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1

Senior Debt Fastball Presentation  

Broader source: Energy.gov [DOE]

Plenary III: Project Finance and Investment Senior Debt Fastball Presentation Phillip Thomas, Senior Vice President of Commercial Lending, Heartland Bank

2

Slow Moving Debt Crises  

E-Print Network [OSTI]

What circumstances or policies leave sovereign borrowers at the mercy of self-fulfilling increases in interest rates? To answer this question, we study the dynamics of debt and interest rates in a model where default is ...

Lorenzoni, Guido

2013-06-30T23:59:59.000Z

3

Student Loan Debt Management O V E R V I E WO V E R V I E WO V E R V I E WO V E R V I E W  

E-Print Network [OSTI]

forgiven remains a taxable income Extended Repayment Plans Unconsolidated debt must be at least $30 000Unconsolidated debt must be at least $30,000 Consolidation loans start at $7,500 · *Based on $25,500 Subsidized

Kammen, Daniel M.

4

Panama's exports and its sovereign debt  

Science Journals Connector (OSTI)

Panama has a foreign debt that represents 81. ... countries such as Mexico. For countries like Panama, which are not in the severely indebted ... with high official debt. In the 1980s, Panama rescheduled $594 mil...

Seymour Patterson

1992-06-01T23:59:59.000Z

5

Ageing, Debt, and Growth Crises: Two Forerunners  

Science Journals Connector (OSTI)

High levels of public debt and frustratingly low growth in Japan and Italy have a common root: an ... chapter follows the reactions of ageing corporations, households, and governments to show that debt crises...

Martin Schulz

2014-01-01T23:59:59.000Z

6

FOREIGN INVESTMENT: Barriers Remain  

Science Journals Connector (OSTI)

FOREIGN INVESTMENT: Barriers Remain ... The two-volume work, titled "Obstacles and Incentives to Private Foreign Investment 1967-68," shows that barriers to private foreign investment around the world haven't really changed much overall in recent years— although there have been some dramatic changes in the investment climate of a few individual nations. ... Comparison with an earlier NICB study covering 1962 to 1964 shows that economic problems are now considered a barrier to foreign investment in a greater number of countries than in the earlier period. ...

1969-09-22T23:59:59.000Z

7

Land Clearing and the Biofuel Carbon Debt  

Science Journals Connector (OSTI)

...first 50 years of this process the “carbon debt” of...Brazilian Amazon to soybean biodiesel, Brazilian Cerrado...tropical rainforest to palm biodiesel, and U.S. central...decomposition, were based on evaluation and synthesis of...and Malaysia to palm biodiesel would result in a biofuel...

Joseph Fargione; Jason Hill; David Tilman; Stephen Polasky; Peter Hawthorne

2008-02-29T23:59:59.000Z

8

Financing Solar PV at Government Sites with PPAs and Public Debt...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Solar PV at Government Sites with PPAs and Public Debt Financing Solar PV at Government Sites with PPAs and Public Debt Overview of financing solar photovoltaics at government...

9

Loans for Refinancing Debt (New York) | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Loans for Refinancing Debt (New York) Loans for Refinancing Debt (New York) Loans for Refinancing Debt (New York) < Back Eligibility Agricultural Commercial Construction Fuel Distributor Industrial Installer/Contractor Institutional Investor-Owned Utility Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools Systems Integrator Transportation Utility Savings Category Alternative Fuel Vehicles Hydrogen & Fuel Cells Buying & Making Electricity Water Home Weatherization Solar Wind Program Info State New York Program Type Loan Program Provider New York Business Development Corporation NYBDC provides Loans for Refinancing Debt. It can refinance up to 80% of the value of the business's collateral, and the repayment period is tied

10

Three essays on sovereign debt and financial markets  

E-Print Network [OSTI]

This dissertation analyzes different aspects of the actions of borrowing and repaying debts by governments in both domestic and international financial markets. In Chapter 1, which is co-authored with Guido Sandleris and ...

Alessandro, Mauro

2011-01-01T23:59:59.000Z

11

Debt bad, surplus good, right? Not necessarily, economists say  

E-Print Network [OSTI]

agree that the U.S. has a high amount of debt relative to its gross domestic product and must do percent under George H.W. Bush and 84 percent under George W. Bush. President Obama has overseen another

Belogay, Eugene A.

12

The Non-Neutrality of Debt in Investment Timing: A New NPV Rule  

E-Print Network [OSTI]

Limited liability debt financing of irreversible investments can affect investment timing through an entrepreneur’s option value, even after compensating a lender for expected default losses. This non-neutrality of debt ...

Sabarwal, Tarun

2005-01-01T23:59:59.000Z

13

Statistical Mechanics of Money, Income, Debt, and Energy Consumption  

E-Print Network [OSTI]

Statistical Mechanics of Money, Income, Debt, and Energy Consumption Physics Colloquium Presented in financial markets. Globally, data analysis of energy consumption per capita around the world shows@american.edu Similarly to the probability distribution of energy in physics, the probability distribution of money among

Hill, Wendell T.

14

11 - Public Debt, Balanced Budgets, and Current Accounts  

Science Journals Connector (OSTI)

The future of the American economy is concerned, as well as the dollar’s stability have been put in doubt by the exponential rise of the debt curve. Also, destabilizing is the fact that Congress sets the ceiling on how much the country may borrow from its citizen without asking penetrating questions to those who authorize runaway expenditures. Critics say that by now, raising the debt ceiling has become the nearest thing to routine. This does not go unnoticed by the markets. In mid-2011, when the debt ceiling was raised after a political fight, trading in \\{CDSs\\} on Treasury securities picked up. The price of protection against default, as measured by the CDS spread, rose to the point that 1-year credit protection became almost as expensive as 5-year protection—which is typically seen in distressed markets where investors price in an imminent default. The federal government now borrows 30 cents of every dollar it spends. America also imports nearly 40 cents of merchandise for every dollar in demand. Even more ominous is the fact that since the early years of this century, under the Bush Jr. Administration, the government has turned a blind eye to the country’s skyrocketing fiscal deficit. Like France, Italy, Spain, and Greece, the United States is a very heavily indebted nation, raising the question: who will bear the burden of adjustment, and of return to “normal” levels of public debt.

Dimitris N. Chorafas

2014-01-01T23:59:59.000Z

15

Recommendation 215: Recommendation on Remaining Legacy Materials...  

Office of Environmental Management (EM)

5: Recommendation on Remaining Legacy Materials on the Oak Ridge Reservation Recommendation 215: Recommendation on Remaining Legacy Materials on the Oak Ridge Reservation The board...

16

The Weak Aggregating Algorithm and Weak Mixability  

E-Print Network [OSTI]

of the Weak Aggregating Algorithm that covers unbounded games is also described. #12; CONTENTS 2 Contents 1The Weak Aggregating Algorithm and Weak Mixability Yuri Kalnishkan Michael V. Vyugin 1 fyura the Weak Aggregating Algorithm that allows us to obtain additive terms of the form C p n. A modification

Kalnishkan, Yuri

17

Taxes and the choice between risky and risk-free debt: on the neutrality of credit default taxation  

Science Journals Connector (OSTI)

Shareholders can decide if their corporation issues risky or risk-free debt. We identify tax systems in which the choice between risky ... and risk-free debt is not distorted by taxes. These credit default neutra...

Kay Blaufus; Jochen Hundsdoerfer

2008-11-01T23:59:59.000Z

18

Are oil prices going to remain volatile?  

Science Journals Connector (OSTI)

For numerous planning problems in industrial but also in private management the expectation of future energy prices remains a crucial parameter. On the basis ... a comprehensive demand/supply model for the world

Dr. F. Wirl

1985-04-01T23:59:59.000Z

19

Weak Parity Scott Aaronson  

E-Print Network [OSTI]

Weak Parity Scott Aaronson Andris Ambainis Kaspars Balodis Mohammad Bavarian§ Abstract We study elementary remarks about WEAK PARITY. (i) Of course it's trivial to guess PAR(X) on a 1/2 fraction of inputs

Aaronson, Scott

20

Understanding Apomixis: Recent Advances and Remaining Conundrums  

Science Journals Connector (OSTI)

...comparative analyses of apomictic and sexual reproduction at the fundamental level in appropriate model systems remains essential for the...2108-2117. Yeung, E.C. (1989). Hieracium. In CRC Handbook of Flowering, Vol. 6, A. Halevy, ed (Boca Raton, FL...

Ross A. Bicknell; Anna M. Koltunow

2004-05-06T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Coal remains a hot commodity for Australia  

SciTech Connect (OSTI)

Based largely on analyses by the Australian Bureau of Agricultural and Resource Economics in late 2005 and early 2006, the article looks at the recent and near future export market for Australian coal. Demand in Asia is growing; European demand remains steady. Developments existing and new mines in Queensland are summarised in the article. 3 tabs.

Bram, L.

2006-02-15T23:59:59.000Z

22

Distillate Stocks Expected to Remain Low  

Gasoline and Diesel Fuel Update (EIA)

5 5 Notes: When EIA's demand forecast is combined with its outlook for production and net imports, distillate stocks are projected to remain low for the rest of the year. - Stocks are beginning at very low levels. The September 1 distillate fuel stock level (112 million barrels) is nearly 20% less than last year, and about 15% below the 10 year average for end of August levels. - But stocks on the East Coast, at 39.8 million barrels, are 39% behind year-ago levels, and about a similar percentage below end-of-August 10-year average levels. Over the last 10 years, the average stock build from the end of August through the end of November has been about 10 million barrels. We are forecasting about a 12 million barrel build, which does not reach the normal band. Forecast stocks peak at the end of November at 127 million

23

The impact of implied facilities cost of money subsidies on capital expenditures and the cost of debt in the defense industry  

Science Journals Connector (OSTI)

We examine the public policy effects of a cash flow subsidy unique to the government contracting industry, on defense contractors’ capital expenditures and cost of debt over a relatively long time-period, 1978–2009. Because the Department of Defense found evidence of a shrinking defense industrial base in the early 1970s, it wanted to encourage capital spending by defense firms. The result was a cost accounting standard that reimbursed contractors for an imputed facilities capital cost of money (FCCOM) that has remained in effect, virtually unchanged, for almost 30 years, despite structural changes in the defense industry. Our results, using a sample of 628 defense firms, suggest that the standard met its intended objective of increased capital spending within 10 years of its promulgation. However, we also find that the FCCOM subsidy may have contributed to a decreased cost of debt within the defense sector over the long-term. Finally, further analyses indicate that the long-term persistence of this subsidy may have encouraged defense contractors to overinvest in capital goods. Our findings suggest that public policy makers should consider both direct and indirect effects of regulation embedded in accounting standards.

Carolyn M. Callahan; Valaria P. Vendrzyk; Maureen G. Butler

2012-01-01T23:59:59.000Z

24

Carbon debt of Conservation Reserve Program (CRP) grasslands converted to bioenergy production  

E-Print Network [OSTI]

to blunt the climate im- pact of future CRP conversion. land-use change | renewable energy | carbon balance of the environmental impacts of fossil fuel use have stimulated interest in renewable energy sources from agri would avoid C debt entirely and provide modest climate change mitigation immediately. Incen- tives

Chen, Jiquan

25

Extinction Debt and Windows of Conservation Opportunity in the Brazilian Amazon  

Science Journals Connector (OSTI)

...2020, whereas the end of deforestation (EOD) scenario eliminates deforestation by...under four scenarios: BAU, GOV, SR, and EOD. (A to J) Species loss and extinction debt were estimated at...GOV (B), BAU (C), SR (D), and EOD (E). Smaller squares have suffered greatest...

Oliver R. Wearn; Daniel C. Reuman; Robert M. Ewers

2012-07-13T23:59:59.000Z

26

AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT | Department...  

Broader source: Energy.gov (indexed) [DOE]

AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT Acquisition Letters (AL)...

27

AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT | Department...  

Broader source: Energy.gov (indexed) [DOE]

AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT AL 2014-06 ACQUISITION LETTERS REMAINING IN EFFECT Acquisition Letters (AL) that remain in effect are identified below. All other...

28

The Difference Between Certainly and Perhaps: The Bargaining Strategies of Venezuela and Argentina In Commercial Debt Negotiations  

E-Print Network [OSTI]

n.a. n.a. Brazil Mexico Venezuela Chile Total Note: BankThe Renegotiation of Venezuela's Foreign Debt During 1982of repayment was whether Venezuela would have to accept an

Doherty, E.

1995-01-01T23:59:59.000Z

29

Strong side of weak topological insulators  

Science Journals Connector (OSTI)

Three-dimensional topological insulators are classified into “strong” (STI) and “weak” (WTI) according to the nature of their surface states. While the surface states of the STI are topologically protected from localization, this does not hold for the WTI. In this work, we show that the surface states of the WTI are actually protected from any random perturbation that does not break time-reversal symmetry, and does not close the bulk energy gap. Consequently, the conductivity of metallic surfaces in the clean system remains finite even in the presence of strong disorder of this type. In the weak disorder limit, the surfaces are found to be perfect metals, and strong surface disorder only acts to push the metallic surfaces inwards. We find that the WTI differs from the STI primarily in its anisotropy, and that the anisotropy is not a sign of its weakness but rather of its richness.

Zohar Ringel; Yaacov E. Kraus; Ady Stern

2012-07-02T23:59:59.000Z

30

Current Understanding and Remaining Challenges in Modeling Long...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Understanding and Remaining Challenges in Modeling Long-Term Degradation of Borosilicate Nuclear Waste Glasses. Current Understanding and Remaining Challenges in Modeling...

31

Questions remain on funding for cleanup of Oak Ridge Reservation...  

Office of Environmental Management (EM)

Questions remain on funding for cleanup of Oak Ridge Reservation Questions remain on funding for cleanup of Oak Ridge Reservation March 18, 2013 - 12:00pm Addthis There is great...

32

Impedance Biosensors: Applications to Sustainability and Remaining Technical Challenges  

E-Print Network [OSTI]

Impedance Biosensors: Applications to Sustainability and Remaining Technical Challenges Rajeswaran impedance spectroscopy, Biosensors, Sustainability, Endocrine-disrupting chemicals, Nanotechnology

Hammock, Bruce D.

33

Quantum Trajectories based on the Weak Value  

E-Print Network [OSTI]

The notion of trajectory of an individual particle is strictly inhibited in quantum mechanics because of the uncertainty principle. Nonetheless, the weak value, which has been proposed as a novel and measurable quantity definable to any quantum observable, can offer a possible description of trajectory on account of its statistical nature of the value. In this paper, we explore the physical significance provided by this weak trajectory by considering various situations where interference takes place simultaneously with the observation of particles, that is, in prototypical quantum situations for which no classical treatment is available. These include the double slit experiment and Lloyd's mirror, where in the former case it is argued that the real part of the weak trajectory describes an average over the possible classical trajectories involved in the process, and that the imaginary part is related to the variation of interference. It is shown that this average interpretation of the weak trajectory holds universally under the complex probability defined from the given transition process. These features remain essentially unaltered in the case of Lloyd's mirror where interference occurs with a single slit.

Takuya Mori; Izumi Tsutsui

2014-12-02T23:59:59.000Z

34

OECD Crude "Demand" Remains Flat Between 1st and 2nd Quarters  

Gasoline and Diesel Fuel Update (EIA)

6 6 Notes: As we enter the year 2000, we can expect crude oil demand to follow the usual pattern and remain relatively flat in OECD countries between first and second quarters. Note that for OECD, product demand is greater than crude use. These areas import products from outside the region. While product demand falls during the second and third quarters, crude inputs to refineries remain high enough to allow for some product stock building Additionally, purchases of crude oil exceed inputs to refineries for a time, allowing crude oil stocks to build as well in order to cover the shortfall between crude oil production and demand during the fourth and first quarters. Price can strengthen during the "weak product demand" summer months when the market feels stock building is inadequate to meet the

35

Cosmology with weak lensing surveys  

Science Journals Connector (OSTI)

...and future weak lensing surveys such as the Joint Dark Energy Mission (JDEM; e.g...Large-aperture Synoptic Survey Telescope will play a major...and future weak lensing surveys such as the Joint Dark Energy Mission (JDEM; e.g...

2005-01-01T23:59:59.000Z

36

United States, International Partners Remove Last Remaining Weapons-Usable  

Broader source: Energy.gov (indexed) [DOE]

States, International Partners Remove Last Remaining States, International Partners Remove Last Remaining Weapons-Usable Highly Enriched Uranium from Hungary, Set Nuclear Security Milestone United States, International Partners Remove Last Remaining Weapons-Usable Highly Enriched Uranium from Hungary, Set Nuclear Security Milestone November 4, 2013 - 2:09pm Addthis NEWS MEDIA CONTACT (202) 586-4940 WASHINGTON - The U.S. Department of Energy today announced under a multi-year international effort coordinated between Hungary, the United States, the Russian Federation, and the International Atomic Energy Agency (IAEA), the successful removal of all remaining highly enriched uranium (HEU) from Hungary. This makes Hungary the twelfth country to completely eliminate HEU from its borders since President Obama's 2009 announcement

37

Prospects for Offshore Mineral Mining Remain in Doubt  

Science Journals Connector (OSTI)

Prospects for Offshore Mineral Mining Remain in Doubt ... Oil and gas exploration and exploitation offshore have been well established, and such sources are already supplying considerable quantities of energy and chemicals to the world economy. ...

JOSEPH HAGGIN

1988-11-07T23:59:59.000Z

38

FAL 2006-04, Financial Assistance Letters Remaining in Effect  

Broader source: Energy.gov (indexed) [DOE]

Financial Assistance Letters (FALs) that remain in effect are identified below. All other previously issued FALs Financial Assistance Letters (FALs) that remain in effect are identified below. All other previously issued FALs have been superseded by a formal rulemaking, incorporated into other guidance, and/or canceled. *************** Financial Assistance Letters Remaining in Effect Number Date Subject 2006-03 05/10/2006 Implementation Guidance for Awarding Technology Investment Agreements Financial Assistance Letters Discontinued Number Date Subject Disposition 2004-03 02/12/2004 Intellectual Property Moved to the Guide to Financial Assistance 2004-06 11/02/2004 Award Terms Moved to the Guide to Financial Assistance 2005-03 06/27/2005 Eligibility Determination Required by Section 2306 of the Energy Policy Act Moved to the Guide to

39

Reply to Davies: Hydraulic fracturing remains a possible mechanism for  

E-Print Network [OSTI]

LETTER Reply to Davies: Hydraulic fracturing remains a possible mechanism for observed methane mechanisms were leaky gas well casings and the possibility that hydraulic fracturing might generate new- knowledged the possibility of hydraulic fracturing playing a role. Is it possible that hydraulic fracturing

Jackson, Robert B.

40

The Relativistic Heavy Ion Collider (RHIC) - the nation's only remaining  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collider (RHIC) - the nation's only remaining Collider (RHIC) - the nation's only remaining particle collider, located at Brookhaven National Laboratory - has made a series of landmark discoveries and continuing breakthroughs in science and technology. One major accomplishment has been RHIC's ability to recreate and study in detail a type of matter that last existed at the beginning of the universe to better understand the strongest force in nature - the force that holds together the fundamental particles that make up 99 percent of visible matter in the universe today, everything from stars to planets to people. In addition to giving us a new way to explore and understand the nature of the early universe and the force that holds together ordinary matter, research at RHIC has revealed stunning

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Simulating weak localization using superconducting quantum circuits  

E-Print Network [OSTI]

Understanding complex quantum matter presents a central challenge in condensed matter physics. The difficulty lies in the exponential scaling of the Hilbert space with the system size, making solutions intractable for both analytical and conventional numerical methods. As originally envisioned by Richard Feynman, this class of problems can be tackled using controllable quantum simulators. Despite many efforts, building an quantum emulator capable of solving generic quantum problems remains an outstanding challenge, as this involves controlling a large number of quantum elements. Here, employing a multi-element superconducting quantum circuit and manipulating a single microwave photon, we demonstrate that we can simulate the weak localization phenomenon observed in mesoscopic systems. By engineering the control sequence in our emulator circuit, we are also able to reproduce the well-known temperature dependence of weak localization. Furthermore, we can use our circuit to continuously tune the level of disorder, a parameter that is not readily accessible in mesoscopic systems. By demonstrating a high level of control and complexity, our experiment shows the potential for superconducting quantum circuits to realize scalable quantum simulators.

Yu Chen; P. Roushan; D. Sank; C. Neill; Erik Lucero; Matteo Mariantoni; R. Barends; B. Chiaro; J. Kelly; A. Megrant; J. Y. Mutus; P. J. J. O'Malley; A. Vainsencher; J. Wenner; T. C. White; Yi Yin; A. N. Cleland; John M. Martinis

2014-03-26T23:59:59.000Z

42

Weak Lensing Predictions at Intermediate Scales  

E-Print Network [OSTI]

As pointed out in previous studies, the measurement of the skewness of the convergence field $\\kappa$ will be useful in breaking the degeneracy among the cosmological parameters constrained from weak lensing observations. The combination of shot noise and finite survey volume implies that such a measurement is likely to be done in a range of intermediate scales ($0.5'$ to 20') where neither perturbation theory nor the hierarchical ansatz apply. Here we explore the behavior of the skewness of $\\kappa$ at these intermediate scales, based on results for the non-linear evolution of the mass bispectrum. We combined different ray-tracing simulations to test our predictions, and we find that our calculations describe accurately the transition from the weakly non-linear to the strongly non-linear regime. We show that the single lens-plane approximation remains accurate even in the non-linear regime, and we explicitly calculate the corrections to this approximation. We also discuss the prospects of measuring the skewn...

Van Waerbeke, L; Scoccimarro, R; Colombi, S; Bernardeau, F

2000-01-01T23:59:59.000Z

43

Probing the Proton's Weak Side | Jefferson Lab  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

proton. The weak force is one of four fundamental forces, which include electromagnetism, gravity and the strong force. The weak force acts on subatomic particles, such...

44

Weak detonations, their paths and  

Science Journals Connector (OSTI)

Previously, a quasi-steady form of the classical Rankine-Hugoniot weak detonation has been shown to play an integral part in describing certain forms of detonation initiation, arising during an intermediate stage between the thermal ignition of the material and the first appearance of a strong detonation with Zeldovich-von Neumann-Döring (ZND) structure. In this paper, we use a parametric variable integration to calculate numerically the path of the weak detonation in two important initiation scenarios, shock-induced and initial disturbance-induced transition to detonation, via a large activation energy induction domain model. The influence that the nature of the path may have on the weak detonation structure is also discussed. In each case these calculations enable us to predict how, where and when the transition to a strong detonation with ZND structure will occur. Explanations for several phenomena observed in both experiments and numerical studies on transition to detonation are also uncovered by these calculations.

Mark Short; J W Dold

2002-01-01T23:59:59.000Z

45

Weak Localization in Bilayer Graphene  

Science Journals Connector (OSTI)

We have performed the first experimental investigation of quantum interference corrections to the conductivity of a bilayer graphene structure. A negative magnetoresistance—a signature of weak localization—is observed at different carrier densities, including the electroneutrality region. It is very different, however, from the weak localization in conventional two-dimensional systems. We show that it is controlled not only by the dephasing time, but also by different elastic processes that break the effective time-reversal symmetry and provide intervalley scattering.

R. V. Gorbachev; F. V. Tikhonenko; A. S. Mayorov; D. W. Horsell; A. K. Savchenko

2007-04-26T23:59:59.000Z

46

Sources of Weakness in Glass  

Science Journals Connector (OSTI)

...October 1964 research-article Sources of Weakness in Glass C. Gurney The theoretical strength of glass is of the order of 2 to 5 MLb./in.$^2$ At room temperature, common glasses with undamaged surfaces give breaking stresses of about...

1964-01-01T23:59:59.000Z

47

Weak lensing and dark energy  

Science Journals Connector (OSTI)

We study the power of upcoming weak lensing surveys to probe dark energy. Dark energy modifies the distance-redshift relation as well as the matter power spectrum, both of which affect the weak lensing convergence power spectrum. Some dark-energy models predict additional clustering on very large scales, but this probably cannot be detected by weak lensing alone due to cosmic variance. With reasonable prior information on other cosmological parameters, we find that a survey covering 1000 sq deg down to a limiting magnitude of R=27 can impose constraints comparable to those expected from upcoming type Ia supernova and number-count surveys. This result, however, is contingent on the control of both observational and theoretical systematics. Concentrating on the latter, we find that the nonlinear power spectrum of matter perturbations and the redshift distribution of source galaxies both need to be determined accurately in order for weak lensing to achieve its full potential. Finally, we discuss the sensitivity of the three-point statistics to dark energy.

Dragan Huterer

2002-02-12T23:59:59.000Z

48

Tight Oklahoma gas sands remain an attractive play  

SciTech Connect (OSTI)

The Cherokee tight gas sands of Oklahoma remain an attractive play because of improvements in drilling and completion practices and actions by the Oklahoma Corporation Commission (OCC) that allow separate allowables for new wells. The expired federal tax credits for tight gas wells have not been the only reason for increased activity. Since decontrol of most regulated gas pricing and since 1986, the number of wells drilled and gas production per well have been increasing in the cherokee area while overall drilling in Oklahoma has decreased. These conclusions are based on wells as categorized by permit date and not by the spud, completion, or first production date. A few wells outside but adjacent to the Cherokee area may have been included, although, their impact on the conclusions is considered nominal. The paper discusses the tight gas credit, proration units, the concept of separate allowables, costs, completion efficiency, and the economic outlook for this area.

Cartwright, G.L. [Marathon Oil Co., Oklahoma City, OK (United States)

1995-04-24T23:59:59.000Z

49

Weak Interactions in Atoms Nuclear Anapole Moment Weak Coupling Constants Nuclear Anapole Moment  

E-Print Network [OSTI]

Weak Interactions in Atoms Nuclear Anapole Moment Weak Coupling Constants Nuclear Anapole Moment;Weak Interactions in Atoms Nuclear Anapole Moment Weak Coupling Constants Plan of the talk Weak Interactions in Atoms Charged and Neutral Currents. Effective P-odd Hamiltonian Nuclear Anapole Moment

Pines, Alexander

50

Electromagnetic weak turbulence theory revisited  

SciTech Connect (OSTI)

The statistical mechanical reformulation of weak turbulence theory for unmagnetized plasmas including fully electromagnetic effects was carried out by Yoon [Phys. Plasmas 13, 022302 (2006)]. However, the wave kinetic equation for the transverse wave ignores the nonlinear three-wave interaction that involves two transverse waves and a Langmuir wave, the incoherent analogue of the so-called Raman scattering process, which may account for the third and higher-harmonic plasma emissions. The present paper extends the previous formalism by including such a term.

Yoon, P. H. [IPST, University of Maryland, College Park, Maryland 20742 (United States); Ziebell, L. F. [Instituto de Fisica, UFRGS, Porto Alegre, RS (Brazil); Gaelzer, R.; Pavan, J. [Instituto de Fisica e Matematica, UFPel, Pelotas, RS (Brazil)

2012-10-15T23:59:59.000Z

51

27 contribution to weak electromagnetic decays  

Science Journals Connector (OSTI)

We notice that the assumption of octet dominance of the Cabibbo weak Hamiltonian is not required to explain the weak electromagnetic decays. In order to explain large asymmetry parameter ?(?+?p?) we consider ?7 contribution to the parity-violating Hamiltonian.

Ramesh C. Verma and M. P. Khanna

1978-12-01T23:59:59.000Z

52

Electronic publishing: strengths, weaknesses and threats  

Science Journals Connector (OSTI)

...April 1998 news News Electronic publishing: strengths, weaknesses and threats Derek McNally Treasurer of the RAS 2.7 April 1998 Vol 39 NEWS Both Monthly...Treasurer of the RAS. Electronic publishing: strengths, weaknesses and threats...

Derek McNally

1998-04-01T23:59:59.000Z

53

Economies of size and other factors influencing costs and returns on major U.S. crop farms with implications for debt repayment capacity  

E-Print Network [OSTI]

ECONOFIIES OF STEP AND OTHER PACTOP+ INFIUENCII1C COSTS AND RETUPoNS ON ILK. IOR U. S. CROP FARMS NITH IMPLICATIONS FOR DEBT REPAYMENT CAPACITY A Thesis Sandra Kay McDonald Submitted to the Graduate Col. lege of Texas A&M University.... S. Crop Farms with Implications For Debt Repayment Capacity (August 1978) Sandra Kay McDonald, B. S. , Texas A&M University Chairman of Advisory Committee: Peter J. Barry This study analyzes several classification variables, including , co...

McDonald, Sandra Kay

1978-01-01T23:59:59.000Z

54

Metrization in weakly sequential spaces  

E-Print Network [OSTI]

is a weakly sequential, T -space with an HCS-CP collection QU of open sets, then QV has finite order at every non-isolated point p in X. Proof: Let QU = (U : a c A) and let p be a non-isolated point in X. Let QU (p) (U c &U : p c U ). Suppose that a... neigh- borhood base QV = (V. : i t N) at p. Since QB (n) has finite order i at p, for each i c N, let pi E(ViA B. ) ? (p. : j & i) where Bi c i B (n), p is not an element of B. and B g B. , for j & i. Then 0 i i j' (p ) converges to p. Since each p...

Emerson, Dominique Margaret

2012-06-07T23:59:59.000Z

55

Weak Boson Emission in Hadron Collider Processes  

E-Print Network [OSTI]

The O(alpha) virtual weak radiative corrections to many hadron collider processes are known to become large and negative at high energies, due to the appearance of Sudakov-like logarithms. At the same order in perturbation theory, weak boson emission diagrams contribute. Since the W and Z bosons are massive, the O(alpha) virtual weak radiative corrections and the contributions from weak boson emission are separately finite. Thus, unlike in QED or QCD calculations, there is no technical reason for including gauge boson emission diagrams in calculations of electroweak radiative corrections. In most calculations of the O(alpha) electroweak radiative corrections, weak boson emission diagrams are therefore not taken into account. Another reason for not including these diagrams is that they lead to final states which differ from that of the original process. However, in experiment, one usually considers partially inclusive final states. Weak boson emission diagrams thus should be included in calculations of electroweak radiative corrections. In this paper, I examine the role of weak boson emission in those processes at the Fermilab Tevatron and the CERN LHC for which the one-loop electroweak radiative corrections are known to become large at high energies (inclusive jet, isolated photon, Z+1 jet, Drell-Yan, di-boson, t-bar t, and single top production). In general, I find that the cross section for weak boson emission is substantial at high energies and that weak boson emission and the O(alpha) virtual weak radiative corrections partially cancel.

U. Baur

2006-11-17T23:59:59.000Z

56

Weak measurement and control of entanglement generation  

E-Print Network [OSTI]

In this paper we show how weak joint measurement and local feedback can be used to control entanglement generation between two qubits. To do this, we make use of a decoherence free subspace (DFS). Weak measurement and feedback can be used to drive the system into this subspace rapidly. Once within the subspace, feedback can generate entanglement rapidly, or turn off entanglement generation dynamically. We also consider, in the context of weak measurement, some of differences between purification and generating entanglement.

Charles D. Hill; J. F. Ralph

2008-01-28T23:59:59.000Z

57

Weak measurements with a qubit meter  

E-Print Network [OSTI]

We derive schemes to measure the so-called weak values of quantum system observables by coupling of the system to a qubit meter system. We highlight, in particular, the meaning of the imaginary part of the weak values, and show how it can be measured directly on equal footing with the real part of the weak value. We present compact expressions for the weak value of single qubit observables and of product observables on qubit pairs. Experimental studies of the results are suggested with cold trapped ions.

Shengjun Wu; Klaus Mølmer

2009-11-13T23:59:59.000Z

58

WEAK MEASUREMENT IN QUANTUM MECHANICS ABRAHAM NEBEN  

E-Print Network [OSTI]

WEAK MEASUREMENT IN QUANTUM MECHANICS ABRAHAM NEBEN PHYS 342 Final Project March 10, 2011 Contents of Postselection 4 4. Impossible Spin Measurements 5 5. Hardy's Paradox 5 6. Controversy over Weak Measurement 8 7 of a Measurement of a Component of the Spin of a Spin-1/2 Particle Can Turn Out to be 100." [1] The topic

Rosner, Jonathan L.

59

SEEING AND COMMUNICATING THROUGH WEAK ELECTRIC  

E-Print Network [OSTI]

Inside JEB i SEEING AND COMMUNICATING THROUGH WEAK ELECTRIC FIELDS Weakly electric fish spend their lives bathed in their own internally generated mild electric field, interpreting perturbations frequency electric `chirps'. Rüdiger Krahe, from McGill University, Canada, says, `These fish are very

60

Oph and the weak-wind problem  

Science Journals Connector (OSTI)

......but also in velocity space (Sundqvist...because of the wind clumpiness...line ratio maps of Sh 2-27...a clump of mass M cl located...candidate weak-wind stars (Martins...its space velocity of 30 km s1...the weak-wind problem...understanding the mass-loss mechanism...transverse velocity imply that......

V. V. Gvaramadze; N. Langer; J. Mackey

2012-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

CP Violation, Neutral Currents, and Weak Equivalence  

DOE R&D Accomplishments [OSTI]

Within the past few months two excellent summaries of the state of our knowledge of the weak interactions have been presented. Correspondingly, we will not attempt a comprehensive review but instead concentrate this discussion on the status of CP violation, the question of the neutral currents, and the weak equivalence principle.

Fitch, V. L.

1972-03-23T23:59:59.000Z

62

Quantum correlation cost of the weak measurement  

E-Print Network [OSTI]

Quantum correlation cost (QCC) characterizing how much quantum correlation is used in a weak-measurement process is presented based on the trace norm. It is shown that the QCC is related to the trace-norm-based quantum discord (TQD) by only a factor that is determined by the strength of the weak measurement, so it only catches partial quantumness of a quantum system compared with the TQD. We also find that the residual quantumness can be `extracted' not only by the further von Neumann measurement, but also by a sequence of infinitesimal weak measurements. As an example, we demonstrate our outcomes by the Bell-diagonal state.

Jun Zhang; Shao-xiong Wu; Chang-shui Yu

2014-09-14T23:59:59.000Z

63

Current Size and Remaining Market Potential of the U.S. Energy...  

Broader source: Energy.gov (indexed) [DOE]

Current Size and Remaining Market Potential of the U.S. Energy Service Company Industry Current Size and Remaining Market Potential of the U.S. Energy Service Company Industry...

64

Microsoft Word - AL 2010-07 Acquistion Letters Remaining in Effect...  

Office of Environmental Management (EM)

AL 2010-07 Acquistion Letters Remaining in Effect May 2010 revision 1 June 2010 Microsoft Word - AL 2010-07 Acquistion Letters Remaining in Effect May 2010 revision 1 June 2010...

65

A test of the social cohesion hypothesis: interactive female marmots remain at home  

Science Journals Connector (OSTI)

...interactive female marmots remain at home Daniel T. Blumstein * Tina W. Wey Karisa...90095-1606, USA Individuals frequently leave home before reaching reproductive age, but...interactive female marmots remain at home. | Individuals frequently leave home before...

2009-01-01T23:59:59.000Z

66

untied as long as the magnetization remains smooth and finite. Skyrmions are therefore  

E-Print Network [OSTI]

neutron-scattering experiments and related theoretical work that established that lattices of skyrmions of a weak mag- netic field4,5 . But because neutron scattering can detect only periodic structures

Blaustein, Andrew R.

67

Weak Lensing Simulations for the SKA  

E-Print Network [OSTI]

Weak gravitational lensing measurements are traditionally made at optical wavelengths where many highly resolved galaxy images are readily available. However, the Square Kilometre Array (SKA) holds great promise for this type of measurement at radio wavelengths owing to its greatly increased sensitivity and resolution over typical radio surveys. The key to successful weak lensing experiments is in measuring the shapes of detected sources to high accuracy. In this document we describe a simulation pipeline designed to simulate radio images of the quality required for weak lensing, and will be typical of SKA observations. We provide as input, images with realistic galaxy shapes which are then simulated to produce images as they would have been observed with a given radio interferometer. We exploit this pipeline to investigate various stages of a weak lensing experiment in order to better understand the effects that may impact shape measurement. We first show how the proposed SKA1-Mid array configurations perfor...

Patel, Prina; Makhathini, Sphesihle; Abdalla, Filipe; Bacon, David; Brown, Michael L; Heywood, Ian; Jarvis, Matt; Smirnov, Oleg

2015-01-01T23:59:59.000Z

68

Superluminal neutrino: a quantum weak measurement effect?  

E-Print Network [OSTI]

Superluminal neutrino: a quantum weak measurement effect? Pragya Shukla · Dynamical laws, both in quantum and classical theory, are ?me-symmetric. · Measurements, the result of a measurement performed at a later ?me t1 or previous ?me

69

Weak Charge of 133 Walter Johnson  

E-Print Network [OSTI]

Atomic PNC and the Weak Charge of 133 Cs Walter Johnson Department of Physics Notre Dame University http://www.nd.edu/johnson June 21, 2002 Abstract Atomic PNC measurements and calculations are reviewed

Johnson, Walter R.

70

Weak and Strong Theories of Truth  

Science Journals Connector (OSTI)

A subtheory of the theory of self-referential truth known as FS is shown to be weak as a theory of truth but equivalent to full FS in its...

Michael Sheard

2001-06-01T23:59:59.000Z

71

Amplification of Angular Rotations Using Weak Measurements  

E-Print Network [OSTI]

We present a weak measurement protocol that permits a sensitive estimation of angular rotations based on the concept of weak-value amplification. The shift in the state of a pointer, in both angular position and the conjugate orbital angular momentum bases, is used to estimate angular rotations. This is done by an amplification of both the real and imaginary parts of the weak-value of a polarization operator that has been coupled to the pointer, which is a spatial mode, via a spin-orbit coupling. Our experiment demonstrates the first realization of weak-value amplification in the azimuthal degree of freedom. We have achieved effective amplification factors as large as 100, providing a sensitivity that is on par with more complicated methods that employ quantum states of light or extremely large values of orbital angular momentum.

Omar S. Magana-Loaiza; Mohammad Mirhosseini; Brandon Rodenburg; Robert W. Boyd

2013-12-10T23:59:59.000Z

72

Hull Remains from the Pabuç Burnu Shipwreck and Early Transition in Archaic Greek Shipbuilding  

E-Print Network [OSTI]

................................................ 19 II THE HULL REMAINS...................................................................... 21 Fragment Catalogue ....................................................................... 23 UM1..................................................................................... 29 Workings............................................................................ 31 UM2............................................................................................... 39 General Description...

Polzer, Mark Edward

2010-10-12T23:59:59.000Z

73

An analysis of the effects of farm size and tenure upon debt repayment capacity of farmers in the Coastal Bend Area of Texas  

E-Print Network [OSTI]

. s Calculation of the Amount of Annual Income Avail- able i' or Long-Term Debt Repayment on Selected Farm Sizes, 1964 Prices and Government Allotment Programs, Coastal Bend Area, Texas 36 Maximum Amortized. Real Estate Loan that Can Be Repaid with 5 I/2... Percent Interest, and Selected Repayment Periods and. Specified Farm Sizes, 1964 Prices and Government Allotment Programs, Coastal Bend Area, Texas 40 Maximum Amortized Real Estate Loan that Can Be Repaid with Selected. Interest Rates and Selected...

Rahman, Md. Lutfor

2012-06-07T23:59:59.000Z

74

Autoresonance energy transfer versus localization in weakly coupled oscillators  

E-Print Network [OSTI]

In this paper we investigate the distribution of energy between weakly coupled linear and nonlinear oscillators in a two-degree-of-freedom (2D) system. Two classes of problems are studied analytically and numerically: (1) a periodic force with constant frequency is applied to the nonlinear (Duffing) oscillator with slowly time-decreasing linear stiffness; (2) the time-independent nonlinear oscillator is excited by a force with slowly increasing frequency. In both cases, stiffness of the attached linear oscillator and linear coupling remain constant, and the system is initially engaged in resonance. This paper demonstrates that in the systems of the first type autoresonance (AR) occurs in both oscillators while in systems of the second type AR occurs only in the excited nonlinear oscillator but the coupled linear oscillator exhibits small bounded oscillations. Considering slow detuning, we obtain explicit asymptotic approximations for the amplitudes and the phases of oscillations close to exact (numerical) results.

Agnessa Kovaleva; Leonid Manevitch

2014-10-22T23:59:59.000Z

75

T-728: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let...  

Broader source: Energy.gov (indexed) [DOE]

8: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let Remote Users Conduct Bypass Attacks T-728: Apache Tomcat HTTP DIGEST Authentication Weaknesses Let Remote Users Conduct...

76

Theory and Modeling of Weakly Bound/Physisorbed Materials for...  

Broader source: Energy.gov (indexed) [DOE]

Theory and Modeling of Weakly BoundPhysisorbed Materials for Hydrogen Storage Theory and Modeling of Weakly BoundPhysisorbed Materials for Hydrogen Storage Presentation on the...

77

T-705: Linux Kernel Weakness in Sequence Number Generation Facilitates...  

Broader source: Energy.gov (indexed) [DOE]

5: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks T-705: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection...

78

GRR/Section 11-TX-b - Human Remains Process | Open Energy Information  

Open Energy Info (EERE)

1-TX-b - Human Remains Process 1-TX-b - Human Remains Process < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 11-TX-b - Human Remains Process 11TXBHumanRemainsProcess.pdf Click to View Fullscreen Regulations & Policies CCP Art. 49 Triggers None specified Click "Edit With Form" above to add content 11TXBHumanRemainsProcess.pdf Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Flowchart Narrative This flowchart illustrates the procedure a developer must follow when human remains are discovered on or near the project site. Local law enforcement must conduct an investigation into the death of the person, and is the

79

GRR/Section 11-MT-b - Human Remains Process | Open Energy Information  

Open Energy Info (EERE)

b - Human Remains Process b - Human Remains Process < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 11-MT-b - Human Remains Process 11MTBHumanRemainsProcess (1).pdf Click to View Fullscreen Contact Agencies Montana State Historic Preservation Office Regulations & Policies MCA 22-3-805: Discovery of Human Remains or Burial Material Triggers None specified Click "Edit With Form" above to add content 11MTBHumanRemainsProcess (1).pdf Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Flowchart Narrative _ 11-MT-b.1 - Cease Operations and Contact County Coroner MCA 22-3-805: (1) A [developer] who by...construction, or other ground-disturbing

80

GRR/Section 11-CO-b - Human Remains Process | Open Energy Information  

Open Energy Info (EERE)

1-CO-b - Human Remains Process 1-CO-b - Human Remains Process < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 11-CO-b - Human Remains Process 11COBHumanRemainsProcess.pdf Click to View Fullscreen Contact Agencies Colorado Office of Archaeology and Historic Preservation Colorado Commission of Indian Affairs Regulations & Policies Historical, Prehistorical, and Archaeological Resources Act of 1973 8 CCR 1504-7, Rules and Procedures Triggers None specified Click "Edit With Form" above to add content 11COBHumanRemainsProcess.pdf 11COBHumanRemainsProcess.pdf Error creating thumbnail: Page number not in range. Error creating thumbnail: Page number not in range. Flowchart Narrative 11-CO-b.1 and 11-CO-b.2 - Notify County Coroner

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

GRR/Section 11-WA-b - Human Remains Process | Open Energy Information  

Open Energy Info (EERE)

Page Page Edit with form History Facebook icon Twitter icon » GRR/Section 11-WA-b - Human Remains Process < GRR Jump to: navigation, search GRR-logo.png GEOTHERMAL REGULATORY ROADMAP Roadmap Home Roadmap Help List of Sections Section 11-WA-b - Human Remains Process 11-WA-b - Human Remains Process (1).pdf Click to View Fullscreen Triggers None specified This flowchart illustrates the necessary procedure when a developer discovers human remains on a project site. In Washington, every person has the duty to notify the coroner upon the discovery of any human remains in the most expeditious manner possible. The Washington Department of Archaeology and Historic Preservation (DAHP) handles the disposition of non-forensic remains, while the county coroner handles the disposition of

82

Strong effects in weak nonleptonic decays  

SciTech Connect (OSTI)

In this report the weak nonleptonic decays of kaons and hyperons are examined with the hope of gaining insight into a recently proposed mechanism for the ..delta..I = 1/2 rule. The effective Hamiltonian for ..delta..S = 1 weak nonleptonic decays and that for K/sup 0/-anti K/sup 0/ mixing are calculated in the six-quark model using the leading logarithmic approximation. These are used to examine the CP violation parameters of the kaon system. It is found that if Penguin-type diagrams make important contributions to K ..-->.. ..pi pi.. decay amplitudes then upcoming experiments may be able to distinguish the six-quark model for CP violation from the superweak model. The weak radiative decays of hyperons are discussed with an emphasis on what they can teach us about hyperon nonleptonic decays and the ..delta..I = 1/2 rule.

Wise, M.B.

1980-04-01T23:59:59.000Z

83

E-Print Network 3.0 - acromegaly remains under-recognized Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

test sample with both antibodies and a wash step, remaining activity in the wells Source: Burn, Charlotte - Department of Veterinary Clinical Sciences, Roayl Verterinary College...

84

E-Print Network 3.0 - angiography remains controversial Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to identify significant coronary lesions. However, visualizing the complete... coronary tree remains a significant technical and clinical issue. One practical approach is to...

85

Weak Lensing: Dark Matter, Dark Energy  

SciTech Connect (OSTI)

The light rays from distant galaxies are deflected by massive structures along the line of sight, causing the galaxy images to be distorted. Measurements of these distortions, known as weak lensing, provide a way of measuring the distribution of dark matter as well as the spatial geometry of the universe. I will describe the ideas underlying this approach to cosmology. With planned large imaging surveys, weak lensing is a powerful probe of dark energy. I will discuss the observational challenges ahead and recent progress in developing multiple, complementary approaches to lensing measurements.

Jain, Bhuvnesh (University of Pennsylvania) [University of Pennsylvania

2006-02-27T23:59:59.000Z

86

Fish remains (Elasmobranchii, Actinopterygii) from the Late Cretaceous of1 the Benue Trough, Nigeria2  

E-Print Network [OSTI]

Fish remains (Elasmobranchii, Actinopterygii) from the Late Cretaceous of1 the Benue Trough address: romain.vullo@univ-rennes1.fr9 10 Abstract11 Selachian and ray-finned fish remains from various Cenomanian­early Turonian and25 Maastrichtian) created opportunities for the dispersal of many marine fish

87

Learning discriminative localization from weakly labeled data  

Science Journals Connector (OSTI)

Visual categorization problems, such as object classification or action recognition, are increasingly often approached using a detection strategy: a classifier function is first applied to candidate subwindows of the image or the video, and then the ... Keywords: Discriminative discovery, Event detection, Image classification, Object detection, Time series classification, Weakly supervised learning

Minh Hoai; Lorenzo Torresani; Fernando De La Torre; Carsten Rother

2014-03-01T23:59:59.000Z

88

The Weak Interactions of the Muon  

Science Journals Connector (OSTI)

20 April 1965 research-article The Weak Interactions of the Muon R. H. Dalitz The Royal Society is collaborating with JSTOR to digitize, preserve, and extend access to Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences. www.jstor.org

1965-01-01T23:59:59.000Z

89

Reversing entanglement change by a weak measurement  

E-Print Network [OSTI]

PHYSICAL REVIEW A 82, 052323 (2010) Reversing entanglement change by a weak measurement Qingqing Sun,1,* M. Al-Amri,2 Luiz Davidovich,3 and M. Suhail Zubairy1 1Department of Physics and Institute for Quantum Science and Engineering, Texas A...

Sun, Qingqing; Al-Amri, M.; Davidovich, Luiz; Zubairy, M. Suhail.

2010-01-01T23:59:59.000Z

90

Removal of Last Remaining HEU from Vietnam - Time Lapse Video | National  

National Nuclear Security Administration (NNSA)

Removal of Last Remaining HEU from Vietnam - Time Lapse Video | National Removal of Last Remaining HEU from Vietnam - Time Lapse Video | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > Media Room > Video Gallery > Removal of Last Remaining HEU from Vietnam ... Removal of Last Remaining HEU from Vietnam - Time Lapse Video Removal of Last Remaining HEU from Vietnam - Time Lapse Video

91

Estimate of remaining life of blades in aircraft gas turbines from accumulated creep strain  

Science Journals Connector (OSTI)

The structure of a multicomponent solution to the problem of calculating the remaining life of blades on the basis of accumulated creep strain with allowance for the effect of vibration loads is ...

A. N. Vetrov; A. G. Kucher

1993-01-01T23:59:59.000Z

92

Prognostics and Health Management of PEMFC -state of the art and remaining Marine Jouin  

E-Print Network [OSTI]

Prognostics and Health Management of PEMFC - state of the art and remaining challenges Marine Jouin. This involves a better understanding of wearing processes and requires emulating the behavior of the whole

Paris-Sud XI, Université de

93

Current Size and Remaining Market Potential of the U.S. Energy Service Company Industry  

Broader source: Energy.gov [DOE]

"This report contains information on Current Size and Remaining Market Potential of the U.S. Energy Service Company Industry, prepared for the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy, Weatherization and Intergovernmental Program."

94

Remnants of Ritual: A discussion of burial practices and material remains of Pompeian tombs  

E-Print Network [OSTI]

in a kiln, and fragments of tiles and pottery. She also writes that the structure collapsed most likely due to unintentional burning, after which the worshippers dug a pit into the collapsed rubble to deposit a burnt offering. Here, along... of their feasts likely remained. The examination of charred remains from burial pits at a Gallo- Roman cemetery at Faulqeumont in Moselle, France, may give us insight into material deposits around 1st century Roman graves. The graves were mostly pits, with a...

Geller, Jennifer

2013-04-01T23:59:59.000Z

95

The social implications of mortuary remains at two Mimbres Mogollon sites in Grant County, New Mexico  

E-Print Network [OSTI]

THE SOCIAL IMPLICATIONS OF MORTUARY REMAINS AT TWO MIMBRES MOGOLLON SITES IN GRANT COUNTY, NEW MEXICO A Thesis by MICHELE RODES KENNEDY SPREEN Submitted to the Graduate College of Texas AFM University in partial fulfillment... of the requirement for the degree of MASTER OF ARTS May 1983 Major Subject: Anthropology THE SOCIAL IMPLICATIONS OF MORTUARY REMAINS AT TWO MIMBRES MOGOLLON SITES IN GRANT COUNTY, NEW MEXICO A Thesis by MICHELE RODES KENNEDY SPREEN Approved as to style...

Spreen, Michele Rodes Kennedy

2012-06-07T23:59:59.000Z

96

Heating Cooling Flows with Weak Shock Waves  

E-Print Network [OSTI]

The discovery of extended, approximately spherical weak shock waves in the hot intercluster gas in Perseus and Virgo has precipitated the notion that these waves may be the primary heating process that explains why so little gas cools to low temperatures. This type of heating has received additional support from recent gasdynamical models. We show here that outward propagating, dissipating waves deposit most of their energy near the center of the cluster atmosphere. Consequently, if the gas is heated by (intermittent) weak shocks for several Gyrs, the gas within 30-50 kpc is heated to temperatures that far exceed observed values. This heating can be avoided if dissipating shocks are sufficiently infrequent or weak so as not to be the primary source of global heating. Local PV and viscous heating associated with newly formed X-ray cavities are likely to be small, which is consistent with the low gas temperatures generally observed near the centers of groups and clusters where the cavities are located.

W. G. Mathews; A. Faltenbacher; F. Brighenti

2005-11-05T23:59:59.000Z

97

Helicity Observation of Weak and Strong Fields  

E-Print Network [OSTI]

We report in this letter our analysis of a large sample of photospheric vector magnetic field measurements. Our sample consists of 17200 vector magnetograms obtained from January 1997 to August 2004 by Huairou Solar Observing Station of the Chinese National Astronomical Observatory. Two physical quantities, $\\alpha$ and current helicity, are calculated and their signs and amplitudes are studied in a search for solar cycle variations. Different from other studies of the same type, we calculate these quantities for weak ($100G1000G$) fields separately. For weak fields, we find that the signs of both $\\alpha$ and current helicity are consistent with the established hemispheric rule during most years of the solar cycle and their magnitudes show a rough tendency of decreasing with the development of solar cycle. Analysis of strong fields gives an interesting result: Both $\\alpha$ and current helicity present a sign opposite to that of weak fields. Implications of these observations on dynamo theory and helicity production are also briefly discussed.

Mei Zhang

2006-06-09T23:59:59.000Z

98

A National Forum on Demand Response: Results on What Remains to Be Done to  

Broader source: Energy.gov (indexed) [DOE]

A National Forum on Demand Response: Results on What Remains to Be A National Forum on Demand Response: Results on What Remains to Be Done to Achieve Its Potential - Program Design and Implementation Working Group A National Forum on Demand Response: Results on What Remains to Be Done to Achieve Its Potential - Program Design and Implementation Working Group In July 2011, the Federal Energy Regulatory Commission's (FERC) staff and the Department of Energy (DOE) jointly submitted to Congress a required "Implementation Proposal for the National Action Plan on Demand Response." The Implementation Proposal was for FERC's June 2010 National Action Plan for Demand Response. Part of the July 2011 Implementation Proposal called for a "National Forum" on demand response to be conducted by DOE and FERC. Given the

99

White House: D'Agostino To Remain as NNSA Administrator | Department of  

Broader source: Energy.gov (indexed) [DOE]

White House: D'Agostino To Remain as NNSA Administrator White House: D'Agostino To Remain as NNSA Administrator White House: D'Agostino To Remain as NNSA Administrator September 3, 2009 - 12:00am Addthis WASHINGTON, DC - Today, President Barack Obama announced that Thomas Paul D'Agostino, Under Secretary for Nuclear Security of the Department of Energy and Administrator for Nuclear Security of the National Nuclear Security Administration, will continue serving in his current role. The following is a quote from the President included in today's White House press release (the full release is included below): "The dedication and talent of these individuals will be tremendously valuable to my administration as we work to tackle our challenges at home and abroad, and I look forward to working with them in the coming months and years."

100

A National Forum on Demand Response: Results on What Remains to Be Done to  

Broader source: Energy.gov (indexed) [DOE]

A National Forum on Demand Response: Results on What Remains to Be A National Forum on Demand Response: Results on What Remains to Be Done to Achieve Its Potential - Tools and Methods Working Group A National Forum on Demand Response: Results on What Remains to Be Done to Achieve Its Potential - Tools and Methods Working Group In July 2011, the Federal Energy Regulatory Commission's (FERC) staff and the Department of Energy (DOE) jointly submitted to Congress a required "Implementation Proposal for the National Action Plan on Demand Response." The Implementation Proposal was for FERC's June 2010 National Action Plan for Demand Response. Part of the July 2011 Implementation Proposal called for a "National Forum" on demand response to be conducted by DOE and FERC. Given the rapid development of the demand response industry, DOE and FERC decided

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Demand for Food for People in Need Remains High Throughout the Year |  

Broader source: Energy.gov (indexed) [DOE]

Demand for Food for People in Need Remains High Throughout the Year Demand for Food for People in Need Remains High Throughout the Year Demand for Food for People in Need Remains High Throughout the Year December 24, 2013 - 12:00pm Addthis Pictured are donations the Office of Human Capital at EM headquarters provided to the campaign. Pictured are donations the Office of Human Capital at EM headquarters provided to the campaign. WASHINGTON, D.C. - EM and its field sites donated 53,630 pounds - or 27 tons - of non-perishable items to a food drive by federal workers to help feed families across the country in 2013. EM surpassed its goal to donate 50,000 pounds to the 2013 Feds Feed Families Campaign. In Ohio, EM's Portsmouth site donated to the Community Action Committee of Pike County Food Pantry, which typically feeds about 250 needy families

102

A comparison of weak-turbulence and PIC simulations of weak electron-beam plasma interaction  

E-Print Network [OSTI]

Quasilinear theory has long been used to treat the problem of a weak electron beam interacting with plasma and generating Langmuir waves. Its extension to weak-turbulence theory treats resonant interactions of these Langmuir waves with other plasma wave modes, in particular ion-sound waves. These are strongly damped in plasma of equal ion and electron temperatures, as sometimes seen in, for example, the solar corona and wind. Weak turbulence theory is derived in the weak damping limit, with a term describing ion-sound wave damping then added. In this paper we use the EPOCH particle-in-cell code to numerically test weak turbulence theory for a range of electron-ion temperature ratios. We find that in the cold ion limit the results agree well, but increasing ion temperature the three-wave resonance becomes broadened in proportion to the ion-sound wave damping rate. This may be important in, for example, the theory of solar radio bursts, where the spectrum of Langmuir waves is critical. Additionally we establish...

Ratcliffe, Heather; Rozenan, Mohammed B Che; Nakariakov, Valery

2014-01-01T23:59:59.000Z

103

Q-weak: First Direct Measurement of the Weak Charge of the Proton  

E-Print Network [OSTI]

The Q-weak experiment at Hall C of Thomas Jefferson National Accelerator Facility has made the first direct measurement of the weak charge of the proton, Qweak(p), through a precision measurement of the parity-violating asymmetry in elastic e-p scattering at low momentum transfer Q^2= 0.025 (GeV/c)^2 with incident electron beam energy of 1.155 GeV. The Q-weak experiment, along with earlier results of parity violating elastic scattering experiments, is expected to determine the most precise value of Qweak(p) which is suppressed in the Standard Model. If this result is further combined with the 133Cs atomic parity violation (APV) measurement, significant constraints on the weak charge of the up quark, down quark, and neutron can be extracted. This data will also be used to determine the weak-mixing angle, sin^2 theta_?W, with a relative uncertainty of < 0.5% that will provide a competitive measurement of the running of sin^2 theta_?W to low Q^2. An overview of the experiment and its results using the commissioning dataset, constituting approximately 4% of the data collected in the experiment, are reported here.

Nuruzzaman

2013-12-20T23:59:59.000Z

104

Spurious Shear in Weak Lensing with LSST  

SciTech Connect (OSTI)

The complete 10-year survey from the Large Synoptic Survey Telescope (LSST) will image {approx} 20,000 square degrees of sky in six filter bands every few nights, bringing the final survey depth to r {approx} 27.5, with over 4 billion well measured galaxies. To take full advantage of this unprecedented statistical power, the systematic errors associated with weak lensing measurements need to be controlled to a level similar to the statistical errors. This work is the first attempt to quantitatively estimate the absolute level and statistical properties of the systematic errors on weak lensing shear measurements due to the most important physical effects in the LSST system via high fidelity ray-tracing simulations. We identify and isolate the different sources of algorithm-independent, additive systematic errors on shear measurements for LSST and predict their impact on the final cosmic shear measurements using conventional weak lensing analysis techniques. We find that the main source of the errors comes from an inability to adequately characterise the atmospheric point spread function (PSF) due to its high frequency spatial variation on angular scales smaller than {approx} 10{prime} in the single short exposures, which propagates into a spurious shear correlation function at the 10{sup -4}-10{sup -3} level on these scales. With the large multi-epoch dataset that will be acquired by LSST, the stochastic errors average out, bringing the final spurious shear correlation function to a level very close to the statistical errors. Our results imply that the cosmological constraints from LSST will not be severely limited by these algorithm-independent, additive systematic effects.

Chang, C.; Kahn, S.M.; Jernigan, J.G.; Peterson, J.R.; AlSayyad, Y.; Ahmad, Z.; Bankert, J.; Bard, D.; Connolly, A.; Gibson, R.R.; Gilmore, K.; Grace, E.; Hannel, M.; Hodge, M.A.; Jee, M.J.; Jones, L.; Krughoff, S.; Lorenz, S.; Marshall, P.J.; Marshall, S.; Meert, A.

2012-09-19T23:59:59.000Z

105

Lossy compression of weak lensing data  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

Future orbiting observatories will survey large areas of sky in order to constrain the physics of dark matter and dark energy using weak gravitational lensing and other methods. Lossy compression of the resultant data will improve the cost and feasibility of transmitting the images through the space communication network. We evaluate the consequences of the lossy compression algorithm of Bernstein et al. (2010) for the high-precision measurement of weak-lensing galaxy ellipticities. This square-root algorithm compresses each pixel independently, and the information discarded is by construction less than the Poisson error from photon shot noise. For simulated space-based images (without cosmic rays) digitized to the typical 16 bits per pixel, application of the lossy compression followed by image-wise lossless compression yields images with only 2.4 bits per pixel, a factor of 6.7 compression. We demonstrate that this compression introduces no bias in the sky background. The compression introduces a small amount of additional digitization noise to the images, and we demonstrate a corresponding small increase in ellipticity measurement noise. The ellipticity measurement method is biased by the addition of noise, so the additional digitization noise is expected to induce a multiplicative bias on the galaxies measured ellipticities. After correcting for this known noise-induced bias, we find a residual multiplicative ellipticity bias of m {approx} -4 x 10{sup -4}. This bias is small when compared to the many other issues that precision weak lensing surveys must confront, and furthermore we expect it to be reduced further with better calibration of ellipticity measurement methods.

Vanderveld, R Ali [Chicago U., EFI; Caltech /Caltech, JPL; Bernstein, Gary M [Pennsylvania U.; Stoughton, Chris [Fermilab; Rhodes, Jason [Caltech; Caltech, JPL; Massey, Richard [Royal Observ., Edinburgh; Dobke, Benjamin M [Caltech; Caltech, JPL

2011-06-01T23:59:59.000Z

106

A little rain doesn't fix it: Farmers and ranchers remain cautious as drought continues  

E-Print Network [OSTI]

A little rain doesn?t fix it Farmers and ranchers remain cautious as drought continues Summer 2012 tx H2O 11 ] Story by Danielle Kalisek Rains in the Brazos Valley early in 2012 helped this grass green up, but more rains are needed now... have helped ease the pressure, farmers and ranchers remain cautious, remembering the pain of last year as they prepare for the future. ?If you look at what the climatologists are saying, the La Ni?a event expired around the end of April, and we...

Kalisek, Danielle

2012-01-01T23:59:59.000Z

107

Nuclear magnetic resonances in weak fields  

E-Print Network [OSTI]

first choax@ation of nuclear resonances in weak f le). de was sade by k 0, S~ in fiel4u of 6 and lg gauss using a sanple siue of. 1 liter, The nagnetic fields were produced in a solenoi4 pou?x?d by a bazdz of lead storage batteriesx an4 the resonances..., Tbe poser was pxovided for the static nagnetic field by a bank of 20 lead storage cells connected in ssriesi The current was a+usted to the desired value with a variable xesistanoe which was connected in sex'ies with the solenoid. Qm source of field...

Mitchell, Richard Warren

2012-06-07T23:59:59.000Z

108

Contradiction and grammar : the case of weak islands  

E-Print Network [OSTI]

This thesis is about weak islands. Weak islands are contexts that are transparent to some but not all operator-variable dependencies. For this reason, they are also sometimes called selective islands. Some paradigmatic ...

Abrusán, Márta

2007-01-01T23:59:59.000Z

109

Weak Values and Direct Measurement of the Quantum Wavefunction  

Science Journals Connector (OSTI)

We review recent work showing that weak values and weak measurements can be used to perform certain measurements with unprecedented accuracy and moreover can be used to perform a...

Boyd, Robert W

110

Steven Weinberg, Weak Interactions, and Electromagnetic Interactions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Steven Weinberg and Steven Weinberg and Weak and Electromagnetic Interactions Resources with Additional Information Steven Weinberg Courtesy Dr. Steven Weinberg Steven "Weinberg is a professor of physics and astronomy at UT [The University of Texas] Austin and is founding director of the Theory Group in the College of Natural Sciences. [He is] well known for his development of a field theory that unifies the electromagnetic and weak nuclear forces, and for other major contributions to physics and cosmology ... Weinberg's work has been honored with numerous prizes, including the Nobel Prize in Physics in 1979 and the National Medal of Science in 1991. Weinberg is the author of the prize-winning book The First Three Minutes: A Modern View of the Origin of the Universe (which has been translated into 22 foreign languages) as well as Gravitation and Cosmology, The Discovery of Subatomic Particles, Dreams of a Final Theory and The Quantum Theory of Fields. ... Weinberg was the recipient of the Scientist as Poet prize from Rockefeller University for "extraordinary achievements in conveying - with passionate clarity - the ideas, history, explanatory power and aesthetic dimensions of fundamental physics." The citation mentioned two of Weinberg's books.

111

A National Forum on Demand Response: What Remains to Be Done to Achieve Its  

Broader source: Energy.gov (indexed) [DOE]

State and Regional Policy Assistance » Technical Assistance » Demand State and Regional Policy Assistance » Technical Assistance » Demand Response - Policy » A National Forum on Demand Response: What Remains to Be Done to Achieve Its Potential A National Forum on Demand Response: What Remains to Be Done to Achieve Its Potential In July 2011, the Federal Energy Regulatory Commission's (FERC) staff and the Department of Energy (DOE) jointly submitted to Congress a required "Implementation Proposal for the National Action Plan on Demand Response." The Implementation Proposal was for FERC's June 2010 National Action Plan for Demand Response. Part of the July 2011 Implementation Proposal called for a "National Forum" on demand response to be conducted by DOE and FERC. Given the rapid development of the demand response industry, DOE and FERC decided

112

Enhanced Contaminated Human Remains Pouch: initial development and preliminary performance assessments  

SciTech Connect (OSTI)

The objective is to produce a proof of concept prototype Enhanced Contaminated Human Remains Pouch (ECHRP) with self-decontamination capability to provide increased protection to emergency response personnel. The key objective was to decrease the concentration of toxic chemicals through the use of an absorbent and reactive nanocellulose liner. Additionally, nanomaterials with biocidal properties were developed and tested as a 'stand-alone' treatment. The setting was a private company research laboratory. The main outcome measures were production of a functional prototype. A functional prototype capable of mitigating the threats due to sulfur mustard, Soman, and a large variety of liquid and vapor toxic industrial chemicals was produced. Stand-alone biocidal treatment efficacy was validated. The ECHRP provides superior protection from both chemical and biological hazards to various emergency response personnel and human remains handlers.

Iseli, A.M.; Kwen, H.D.; Ul-Alam, M.; Balasubramanian, M.; Rajagopalan, S.

2011-11-07T23:59:59.000Z

113

Weak interaction studies using resonance ionization spectroscopy  

SciTech Connect (OSTI)

Important developments in laser sources for the vacuum ultraviolet (VUV) region of the spectrum are making it possible to carry out resonance ionization of some of the noble gases. It has already been shown that xenon can be ionized in a two-photon allowed excitation from the ground state. Recently a new method of generating radiation by four-wave mixing in mercury vapor enables excitation of xenon in a one-photon resonance process. With these new laser sources we expect to have effective ionization volumes of 10/sup -3/ to 10/sup -2/ cm/sup 3/ for the cases of argon, krypton, and xenon. This has important consequences in weak interaction physics and environmental research.

Payne, M.G.; Hurst, G.S.

1982-01-01T23:59:59.000Z

114

Graphene transparency in weak magnetic fields  

E-Print Network [OSTI]

We carry out an explicit calculation of the vacuum polarization tensor for an effective low-energy model of monolayer graphene in the presence of a weak magnetic field of intensity $B$ perpendicularly aligned to the membrane. By expanding the quasiparticle propagator in the Schwinger proper time representation up to order $(eB)^2$, where $e$ is the unit charge, we find an explicitly transverse tensor, consistent with gauge invariance. Furthermore, assuming that graphene is radiated with monochromatic light of frequency $\\omega$ along the external field direction, from the modified Maxwell's equations we derive the intensity of transmitted light and the angle of polarization rotation in terms of the longitudinal ($\\sigma_{xx}$) and transverse ($\\sigma_{xy}$) conductivities. Corrections to these quantities, both calculated and measured, are of order $(eB)^2/\\omega^4$. Our findings generalize and complement previously known results reported in literature regarding the light absorption problem in graphene from th...

Valenzuela, David; Loewe, Marcelo; Raya, Alfredo

2014-01-01T23:59:59.000Z

115

Modeling active electrolocation in weakly electric fish  

E-Print Network [OSTI]

In this paper, we provide a mathematical model for the electrolocation in weakly electric fishes. We first investigate the forward complex conductivity problem and derive the approximate boundary conditions on the skin of the fish. Then we provide a dipole approximation for small targets away from the fish. Based on this approximation, we obtain a non-iterative location search algorithm using multi-frequency measurements. We present numerical experiments to illustrate the performance and the stability of the proposed multi-frequency location search algorithm. Finally, in the case of disk- and ellipse-shaped targets, we provide a method to reconstruct separately the conductivity, the permittivity, and the size of the targets from multi-frequency measurements.

Habib Ammari; Thomas Boulier; Josselin Garnier

2012-03-05T23:59:59.000Z

116

The human skeletal remains of a skull pit at Colha, Belize  

E-Print Network [OSTI]

, age at death, dental and honey pathology, and the cultural practices of cranial deformation and tooth filing. The study also examined the evidence for postmortem mutilation of the remains and explored the burial pattern. The analysis documented... observed on Colha Skull Pit adults, by sex and age classification. 3 Dental pathology observed in Colha Skull Pit adults. 4 Dental pathology in Colha Skull Pit children listed by caries rank. 39 43 45 5 Distribution of enamel hypoplasia and its...

Massey, Virginia Kehrer

1986-01-01T23:59:59.000Z

117

Taphonomy of the faunal remains of a rural roman farmsite, San Giovanni di Ruoti, Italy  

E-Print Network [OSTI]

remains. The taphonomic analysis included examination of the pig skeletal element representation, identification of the specific agents that modify bone, identification of the butchering techniques used at the site, and documentation of possible... element discrimination when identifications are made. The element analysis resulted in a predictible pattern of bone survival based on the physical structure of the bones. When the faunal sample was examined for the effects of the ten taphonomic agents...

Hunter, Cristi Assad

2012-06-07T23:59:59.000Z

118

The Q_weak Experimental Apparatus  

E-Print Network [OSTI]

The Jefferson Lab Q_weak experiment determined the weak charge of the proton by measuring the parity-violating elastic scattering asymmetry of longitudinally polarized electrons from an unpolarized liquid hydrogen target at small momentum transfer. A custom apparatus was designed for this experiment to meet the technical challenges presented by the smallest and most precise ${\\vec{e}}$p asymmetry ever measured. Technical milestones were achieved at Jefferson Lab in target power, beam current, beam helicity reversal rate, polarimetry, detected rates, and control of helicity-correlated beam properties. The experiment employed 180 microA of 89% longitudinally polarized electrons whose helicity was reversed 960 times per second. The electrons were accelerated to 1.16 GeV and directed to a beamline with extensive instrumentation to measure helicity-correlated beam properties that can induce false asymmetries. Moller and Compton polarimetry were used to measure the electron beam polarization to better than 1%. The electron beam was incident on a 34.4 cm liquid hydrogen target. After passing through a triple collimator system, scattered electrons between 5.8 degrees and 11.6 degrees were bent in the toroidal magnetic field of a resistive copper-coil magnet. The electrons inside this acceptance were focused onto eight fused silica Cerenkov detectors arrayed symmetrically around the beam axis. A total scattered electron rate of about 7 GHz was incident on the detector array. The detectors were read out in integrating mode by custom-built low-noise pre-amplifiers and 18-bit sampling ADC modules. The momentum transfer Q^2 = 0.025 GeV^2 was determined using dedicated low-current (~100 pA) measurements with a set of drift chambers before (and a set of drift chambers and trigger scintillation counters after) the toroidal magnet.

Qweak Collaboration; T. Allison; M. Anderson; D. Androic; D. S. Armstrong; A. Asaturyan; T. D. Averett; R. Averill; J. Balewski; J. Beaufait; R. S. Beminiwattha; J. Benesch; F. Benmokhtar; J. Bessuille; J. Birchall; E. Bonnell; J. Bowman; P. Brindza; D. B. Brown; R. D. Carlini; G. D. Cates; B. Cavness; G. Clark; J. C. Cornejo; S. Covrig Dusa; M. M. Dalton; C. A. Davis; D. C. Dean; W. Deconinck; J. Diefenbach; K. Dow; J. F. Dowd; J. A. Dunne; D. Dutta; W. S. Duvall; J. R. Echols; M. Elaasar; W. R. Falk; K. D. Finelli; J. M. Finn; D. Gaskell; M. T. W. Gericke; J. Grames; V. M. Gray; K. Grimm; F. Guo; J. Hansknecht; D. J. Harrison; E. Henderson; J. R. Hoskins; E. Ihloff; K. Johnston; D. Jones; M. Jones; R. Jones; M. Kargiantoulakis; J. Kelsey; N. Khan; P. M. King; E. Korkmaz; S. Kowalski; A. Kubera; J. Leacock; J. P. Leckey; A. R. Lee; J. H. Lee; L. Lee; Y. Liang; S. MacEwan; D. Mack; J. A. Magee; R. Mahurin; J. Mammei; J. W. Martin; A. McCreary; M. H. McDonald; M. J. McHugh; P. Medeiros; D. Meekins; J. Mei; R. Michaels; A. Micherdzinska; A. Mkrtchyan; H. Mkrtchyan; N. Morgan; J. Musson; K. E. Mesick; A. Narayan; L. Z. Ndukum; V. Nelyubin; Nuruzzaman; W. T. H. van Oers; A. K. Opper; S. A. Page; J. Pan; K. D. Paschke; S. K. Phillips; M. L. Pitt; M. Poelker; J. F. Rajotte; W. D. Ramsay; W. R. Roberts; J. Roche; P. W. Rose; B. Sawatzky; T. Seva; M. H. Shabestari; R. Silwal; N. Simicevic; G. R. Smith; S. Sobczynski; P. Solvignon; D. T. Spayde; B. Stokes; D. W. Storey; A. Subedi; R. Subedi; R. Suleiman; V. Tadevosyan; W. A. Tobias; V. Tvaskis; E. Urban; B. Waidyawansa; P. Wang; S. P. Wells; S. A. Wood; S. Yang; S. Zhamkochyan; R. B. Zielinski

2015-01-06T23:59:59.000Z

119

Acquisition LetteJ'S (AL) that remain in effect are identified below. All odJer  

Broader source: Energy.gov (indexed) [DOE]

LetteJ'S (AL) that remain in effect are identified below. All odJer previously issued ALs have been LetteJ'S (AL) that remain in effect are identified below. All odJer previously issued ALs have been supersedcd by a formal rule-making. incorporated into other guidance, and/or canceled. ~ ~,COUISITION LETTERS REMAINING IN EFFECT NUMBER 93-4 94-19 95-06 95-14 96-09 98-04 98-11 99.{)4 99-06 2000-02 2000-05 2000-08 2000-09 2000-10R 2000-12 200 1-03 ~ SUBJECT !!AIE 04/07/93 12/09/94 06!2819~ 11/17/9~ Displaced Workers Benefits Program Basic Labor Policies Fringe Benefits Personal Property Letter System Subcontracts under the New Independent States - Industrial Partnering Program Full and Open Competition - Management and Operating Contracts Diversity Plans Waiver of Synopsis Requirements Consortium Buying 09/16/96 03/11/98 09/18/98 06/23/99 08/27/99 DOE Authorized Subcontract for Use by DOE Management and

120

Magnified Weak Lensing Cross Correlation Tomography  

SciTech Connect (OSTI)

This project carried out a weak lensing tomography (WLT) measurement around rich clusters of galaxies. This project used ground based photometric redshift data combined with HST archived cluster images that provide the WLT and cluster mass modeling. The technique has already produced interesting results (Guennou et al, 2010,Astronomy & Astrophysics Vol 523, page 21, and Clowe et al, 2011 to be submitted). Guennou et al have validated that the necessary accuracy can be achieved with photometric redshifts for our purposes. Clowe et al titled "The DAFT/FADA survey. II. Tomographic weak lensing signal from 10 high redshift clusters," have shown that for the **first time** via this purely geometrical technique, which does not assume a standard rod or candle, that a cosmological constant is **required** for flat cosmologies. The intent of this project is not to produce the best constraint on the value of the dark energy equation of state, w. Rather, this project is to carry out a sustained effort of weak lensing tomography that will naturally feed into the near term Dark Energy Survey (DES) and to provide invaluable mass calibration for that project. These results will greatly advance a key cosmological method which will be applied to the top-rated ground-based project in the Astro2020 decadal survey, LSST. Weak lensing tomography is one of the key science drivers behind LSST. CO-I Clowe is on the weak lensing LSST committee, and senior scientist on this project, at FNAL James Annis, plays a leading role in the DES. This project has built on successful proposals to obtain ground-based imaging for the cluster sample. By 1 Jan, it is anticipated the project will have accumulated complete 5-color photometry on 30 (or about 1/3) of the targeted cluster sample (public webpage for the survey is available at http://cencos.oamp.fr/DAFT/ and has a current summary of the observational status of various clusters). In all, the project has now been awarded the equivalent of over 60 nights on 4-m class telescopes, which gives concrete evidence of strong community support for this project. The WLT technique is based on the dependence of the gravitational shear signal on the angular diameter distances between the observer, the lens, and the lensed galaxy to measure cosmological parameters. By taking the ratio of measured shears of galaxies with different redshifts around the same lens, one obtains a measurement of the ratios of the angular diameter distances involved. Making these observations over a large range of lenses and background galaxy redshifts will measure the history of the expansion rate of the universe. Because this is a purely geometric measurement, it is insensitive to any form of evolution of objects or the necessity to understand the physics in the early universe. Thus, WLT was identified by the Dark Energy Task Force as perhaps the best method to measure the evolution of DE. To date, however, the conjecture of the DETF has not been experimentally verified, but will be by the proposed project. The primary reason for the lack of tomography measurements is that one must have an exceptional data-set to attempt the measurement. One needs both extremely good seeing (or space observations) in order to minimize the point spread function smearing corrections on weak lensing shear measurements and deep, multi-color data, from B to z, to measure reliable photometric redshifts of the background galaxies being lensed (which are typically too faint to obtain spectroscopic redshifts). Because the entire process from multi-drizzling the HST images, and then creating shear maps, to gathering the necessary ground based observations, to generating photo-zs and then carrying out the tomography is a complicated task, until the creation of our team, nobody has taken the time to connect all the levels of expertise necessary to carry out this project based on HST archival data. Our data are being used in 2 Ph.D. theses. Kellen Murphy, at Ohio University, is using the tomography data along with simulations in a thesis expected to be completed in Jun

Ulmer, Melville P., Clowe, Douglas I.

2010-11-30T23:59:59.000Z

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121

Current Size and Remaining Market Potential of the U.S. Energy Service Company Industry  

Broader source: Energy.gov [DOE]

The study analyzes the size, growth and trends in the U.S. energy service company (ESCO) industry, drawing on information provided by industry executives and experts in 2012. The report also provides a preliminary estimate of remaining investment potential and annual blended energy savings in buildings typically addressed by ESCOs–companies for whom performance-based contracting is a core business activity. The study provides figures broken out by specific markets, including state/local, K-12 schools, universities/colleges, health/hospitals. Author: Stuart, Elizabeth, Peter H. Larsen, Charles A. Goldman, and Donald Gilligan

122

Renovation and remaining life management techniques for the reliable operation of steam turbine valve casings  

SciTech Connect (OSTI)

Much attention has been focused on the renovation and remaining life management of steam turbine casings. Properly engineered casing repairs, design upgrades, and strategies such as thermal stress monitoring/control, have been successfully employed to keep older steam turbine casings operating reliably until projected plant decommissioning dates. These proven solutions have resulted in a much lower cost alternative to turbine casing replacement. Valve casings are also subject to the rigors of high pressure/temperature operating environments and have a significant replacement cost as well. The same techniques employed to renovate turbine casings can also be successfully applied to valve casings to ensure their reliable operation for the projected plant life. Of particular interest are design upgrades which can be introduced during the renovation. Advances in computer modeling and techniques such as Finite Element analysis have provided engineers with tools not available during the original casing design. This provides an opportunity to not only restore the casings to their original design, but to re-engineer the casings to exceed original design parameters. This paper will cover the engineering analysis of valve casing defects, restoration techniques, and design upgrades. Thermal stress monitoring will be introduced as a technique to manage remaining life. Typical failure modes in various valve casing designs as well as design improvements will be stressed. It will also use case studies to demonstrate the economic and technical advantages of valve and turbine casing renovation.

Rasmussen, D.M.; Otterlee, T.J. [Turbine Consultants, Inc., Milwaukee, WI (United States)

1994-12-31T23:59:59.000Z

123

Current Understanding and Remaining Challenges in Modeling Long-Term Degradation of Borosilicate Nuclear Waste Glasses  

SciTech Connect (OSTI)

Chemical durability is not a single material property that can be uniquely measured. Instead it is the response to a host of coupled material and environmental processes whose rates are estimated by a combination of theory, experiment, and modeling. High-level nuclear waste (HLW) glass is perhaps the most studied of any material yet there remain significant technical gaps regarding their chemical durability. The phenomena affecting the long-term performance of HLW glasses in their disposal environment include surface reactions, transport properties to and from the reacting glass surface, and ion exchange between the solid glass and the surrounding solution and alteration products. The rates of these processes are strongly influenced and are coupled through the solution chemistry, which is in turn influenced by the reacting glass and also by reaction with the near-field materials and precipitation of alteration products. Therefore, those processes must be understood sufficiently well to estimate or bound the performance of HLW glass in its disposal environment over geologic time-scales. This article summarizes the current state of understanding of surface reactions, transport properties, and ion exchange along with the near-field materials and alteration products influences on solution chemistry and glass reaction rates. Also summarized are the remaining technical gaps along with recommended approaches to fill those technical gaps.

Vienna, John D. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Ryan, Joseph V. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Gin, Stephane [CEA Marcoule, DTCD SECM, Bagnols-sur-Ceze (France); Inagaki, Yaohiro [Dept. of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoda (Japan)

2013-12-05T23:59:59.000Z

124

Degenerate weakly nonlinear elastic plane waves  

E-Print Network [OSTI]

Weakly nonlinear plane waves are considered in hyperelastic crystals. Evolution equations are derived at a quadratically nonlinear level for the amplitudes of quasi-longitudinal and quasi-transverse waves propagating in arbitrary anisotropic media. The form of the equations obtained depends upon the direction of propagation relative to the crystal axes. A single equation is found for all propagation directions for quasi-longitudinal waves, but a pair of coupled equations occurs for quasi-transverse waves propagating along directions of degeneracy, or acoustic axes. The coupled equations involve four material parameters but they simplify if the wave propagates along an axis of material symmetry. Thus, only two parameters arise for propagation along an axis of two-fold symmetry, and one for a three-fold axis. The transverse wave equations decouple if the axis is four-fold or higher. In the absence of a symmetry axis it is possible that the evolution equations of the quasi-transverse waves decouple if the third order elastic moduli satisfy a certain identity. The theoretical results are illustrated with explicit examples.

W?odzimierz Doma?ski; Andrew N. Norris

2008-12-18T23:59:59.000Z

125

Graphene transparency in weak magnetic fields  

E-Print Network [OSTI]

We carry out an explicit calculation of the vacuum polarization tensor for an effective low-energy model of monolayer graphene in the presence of a weak magnetic field of intensity $B$ perpendicularly aligned to the membrane. By expanding the quasiparticle propagator in the Schwinger proper time representation up to order $(eB)^2$, where $e$ is the unit charge, we find an explicitly transverse tensor, consistent with gauge invariance. Furthermore, assuming that graphene is radiated with monochromatic light of frequency $\\omega$ along the external field direction, from the modified Maxwell's equations we derive the intensity of transmitted light and the angle of polarization rotation in terms of the longitudinal ($\\sigma_{xx}$) and transverse ($\\sigma_{xy}$) conductivities. Corrections to these quantities, both calculated and measured, are of order $(eB)^2/\\omega^4$. Our findings generalize and complement previously known results reported in literature regarding the light absorption problem in graphene from the experimental and theoretical points of view, with and without external magnetic fields.

David Valenzuela; Saúl Hernández-Ortiz; Marcelo Loewe; Alfredo Raya

2014-10-20T23:59:59.000Z

126

Weak nuclear forces cause the strong nuclear force  

E-Print Network [OSTI]

We determine the strength of the weak nuclear force which holds the lattices of the elementary particles together. We also determine the strength of the strong nuclear force which emanates from the sides of the nuclear lattices. The strong force is the sum of the unsaturated weak forces at the surface of the nuclear lattices. The strong force is then about ten to the power of 6 times stronger than the weak force between two lattice points.

E. L. Koschmieder

2007-12-11T23:59:59.000Z

127

CP-odd weak basis invariants and texture zeros  

Science Journals Connector (OSTI)

We construct the CP-odd weak basis invariants from the neutrino mass matrix in a weak basis, in which the charged lepton mass matrix is diagonal, and find the necessary and sufficient conditions for CP conservation. We study the interrelationships between different CP-odd weak basis invariants to examine their implications for the Dirac- and Majorana-type CP violating phases for the phenomenologically allowed Frampton-Glashow-Marfatia texture zero structures of the neutrino mass matrix.

S. Dev; Sanjeev Kumar; Surender Verma

2009-02-20T23:59:59.000Z

128

Coherence oscillations between weakly coupled Bose-Hubbard dimers  

E-Print Network [OSTI]

We study theoretically the dynamics of two weakly-coupled Bose-Josephson junctions, prepared with the same particle number $N$ and Josephson excitation number $\

Christine Khripkov; Amichay Vardi

2014-05-11T23:59:59.000Z

129

Weak and Strong Superiorization: Between Feasibility-Seeking and ...  

E-Print Network [OSTI]

Sep 30, 2014 ... This does not create any ambiguity because whether we consider an ... A fundamental difference between weak and strong superiorization lies.

User

2014-10-01T23:59:59.000Z

130

Phenomenology and cosmology of weakly coupled string theory  

E-Print Network [OSTI]

ph/9805320 May 1998 Phenomenology and cosmology of weaklyThe important point for phenomenology is the decomposition2]. Implications for phenomenology and open questions The

Gaillard, Mary K.

1998-01-01T23:59:59.000Z

131

A National Forum on Demand Response: Results on What Remains to Be Done to  

Broader source: Energy.gov (indexed) [DOE]

Cost-Effectiveness Working Group Cost-Effectiveness Working Group A National Forum on Demand Response: Results on What Remains to Be Done to Achieve Its Potential - Cost-Effectiveness Working Group In July 2011, the Federal Energy Regulatory Commission's (FERC) staff and the Department of Energy (DOE) jointly submitted to Congress a required "Implementation Proposal for the National Action Plan on Demand Response." The Implementation Proposal was for FERC's June 2010 National Action Plan for Demand Response. Part of the July 2011 Implementation Proposal called for a "National Forum" on demand response to be conducted by DOE and FERC. Given the rapid development of the demand response industry, DOE and FERC decided that a "virtual" project, in which state officials, industry

132

A National Forum on Demand Response: Results on What Remains to Be Done to  

Broader source: Energy.gov (indexed) [DOE]

Measurement and Verification Working Group Measurement and Verification Working Group A National Forum on Demand Response: Results on What Remains to Be Done to Achieve Its Potential - Measurement and Verification Working Group In July 2011, the Federal Energy Regulatory Commission's (FERC) staff and the Department of Energy (DOE) jointly submitted to Congress a required "Implementation Proposal for the National Action Plan on Demand Response." The Implementation Proposal was for FERC's June 2010 National Action Plan for Demand Response. Part of the July 2011 Implementation Proposal called for a "National Forum" on demand response to be conducted by DOE and FERC. Given the rapid development of the demand response industry, DOE and FERC decided that a "virtual" project, in which state officials, industry

133

Remaining Life Related Issues Being Pursued at DRDO for Indian Air Force  

Science Journals Connector (OSTI)

Abstract Hot section components of an aircraft gas turbine engine are critical to the performance and safety during the operation of military aircraft, where the service spectra are highly random and relatively severe in terms of the loading rates. DMRL, in collaboration with Indian Air Force (IAF), has initiated a project for the estimation of remaining life as well as life extension of military aeroengines of various origins. This is based on extensive laboratory specimen-level material characterization in terms of fatigue and creep, followed by the scale-up of experimental results to actual component. Finite Element Analysis (FEA) is an indispensable engineering tool for evaluation of the mechanical variables that determine crack initiation and growth, apart from material degradation prior to physical failure. DMRL's understanding and experience with FEA applications and damage mechanics concepts in these areas are briefly discussed in this paper.

Vikas Kumar

2013-01-01T23:59:59.000Z

134

RHIC BEAM ABORT KICKER POWER SUPPLY SYSTEM COMMISSIONING EXPERIENCE AND REMAINING ISSUES.  

SciTech Connect (OSTI)

The RHIC Beam Abort Kicker Power Supply Systems commissioning experience and the remaining issues will be reported in this paper. The RHIC Blue Ring Beam Abort Kicker Power Supply System initial commissioning took place in June 1999. Its identical system in Yellow Ring was brought on line during Spring 2000. Each of the RHIC Beam Abort Kicker Power Supply Systems consists of five high voltage modulators and subsystems. These systems are critical devices for RHIC machine protection and environmental protection. They are required to be effective, reliable and operating with sufficient redundancy to safely abort the beam to its beam dump at the end of accumulation or at any time when they are commanded. To deflect 66 GeV ion beam to the beam absorbers, the RHIC Beam Abort Kicker Power Supply Systems were operated at 22 kV level. The RHIC 2000 commissioning run was very successful.

ZHANG,W.; AHRENS,L.A.; MI,J.; OERTER,B.; SANDERS,R.; SANDBERG,J.

2001-06-18T23:59:59.000Z

135

Neutron measurements of the fuel remaining in the TMI II once-through steam generators (OTSG'S)  

SciTech Connect (OSTI)

Polypropylene tubes containing a string of 18 copper rods were inserted into the lower head region and each J-leg of the two once-through steam generators (OTSG) of the unit two reactor at Three Mile Island. The object was to measure the neutron flux present in those regions and estimate the amount of residual fuel remaining in each OTSG. The neutron flux from any residual fuel induces a radioisotope, /sup 64/Cu, in the copper coupons. The /sup 64/Cu activity is detected by coincidence counting the two 511-keV gamma rays produced by the annihilation of the positron emitted in the decay of /sup 64/Cu. The copper coupons were placed between two 6-inch diameter, 6-inch long NaI(Tl) crystals and the electronics produced a coincidence count whenever the two gamma rays were uniquely detected. The net coincidence count is proportional to the amount of /sup 64/Cu activity in the coupon. This document discusses calculation methods, statistical methods, and results of this research. 3 figs., 30 tabs.

Geelhood, B.D.; Abel, K.H.

1989-02-01T23:59:59.000Z

136

V819 TAU: A RARE WEAK-LINED T TAURI STAR WITH A WEAK INFRARED EXCESS  

SciTech Connect (OSTI)

We use Spitzer data to infer that the small infrared excess of V819 Tau, a weak-lined T Tauri star in Taurus, is real and not attributable to a 'companion' 10'' to the south. We do not confirm the mid-infrared excess in HBC 427 and V410 X-ray 3, which are also non-accreting T Tauri stars in the same region; instead, for the former object, the excess arises from a red companion 9'' to the east. A single-temperature blackbody fit to the continuum excess of V819 Tau implies a dust temperature of 143 K; however, a better fit is achieved when the weak 10 and 20 mum silicate emission features are also included. We infer a disk of sub-mum silicate grains between about 1 AU and several 100 AU with a constant surface density distribution. The mid-infrared excess of V819 Tau can be successfully modeled with dust composed mostly of small amorphous olivine grains at a temperature of 85 K, and most of the excess emission is optically thin. The disk could still be primordial, but gas-poor and therefore short-lived, or already at the debris disk stage, which would make it one of the youngest debris disk systems known.

Furlan, E. [Jet Propulsion Laboratory, California Institute of Technology, Mail Stop 264-767, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States); Forrest, W. J.; Manoj, P.; Kim, K. H.; Watson, Dan M. [Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627 (United States); Sargent, B. A., E-mail: Elise.Furlan@jpl.nasa.go, E-mail: forrest@pas.rochester.ed, E-mail: manoj@pas.rochester.ed, E-mail: khkim@pas.rochester.ed, E-mail: dmw@pas.rochester.ed, E-mail: sargent@stsci.ed [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States)

2009-12-01T23:59:59.000Z

137

Quality Assurance of Radiation Therapy Planning Systems: Current Status and Remaining Challenges  

SciTech Connect (OSTI)

Computerized radiation therapy planning systems (RTPSs) are pivotal for treatment planning. The acceptance, commissioning, and quality control of RTPSs are uniquely complex and are described in the American Association of Physicists in Medicine Task Group Report 53 (1998) and International Atomic Energy Agency Technical Report Series No. 430 (2004). The International Atomic Energy Agency also developed a document and data package for use by vendors and purchasers to aid with acceptance testing of RTPSs. This document is based on International Electrotechnical Commission standard 62083 (2000) and describes both 'type' tests to be performed in the factory and 'site' tests to be performed in the clinic. The American Association of Physicists Task Group Report 67 described benchmark tests for the validation of dose calculation algorithms. Test data are being produced with the backing of the U.S. National Cancer Institute. However, significant challenges remain. Technology keeps evolving rapidly, thus requiring new quality assurance (QA) procedures. Intensity-modulated radiation therapy with its use of inverse optimization has added a new dimension to QA, because the results are not intuitively obvious. New technologies such as real-time ultrasound guidance for brachytherapy, TomoTherapy, and Cyberknife, require their own specialized RTPSs with unique QA requirements. On-line imaging allows for the generation of dose reconstructions using image warping techniques to determine the daily dose delivered to the patient. With increasing computer speeds, real-time reoptimization of treatment plans will become a reality. Gating technologies will require four-dimensional dose calculations to determine the actual dose delivered to tissue voxels. With these rapidly changing technologies, it is essential that a strong QA culture is invoked in every institution implementing these procedures and that new protocols are developed as a part of the clinical implementation process.

Van Dyk, Jacob [Department of Physics and Engineering, London Regional Cancer Program/London Health Sciences Centre, London, ON (Canada); Departments of Oncology, Medical Biophysics, Diagnostic Imaging and Nuclear Medicine, and Physics and Astronomy, University of Western Ontario, London, ON (Canada)], E-mail: jake.vandyk@lhsc.on.ca

2008-05-01T23:59:59.000Z

138

Determining Remaining Useful Life of Aging Cables in Nuclear Power Plants – Interim Study FY13  

SciTech Connect (OSTI)

The most important criterion for cable performance is its ability to withstand a design-basis accident. With nearly 1000 km of power, control, instrumentation, and other cables typically found in an NPP, it would be a significant undertaking to inspect all of the cables. Degradation of the cable jacket, electrical insulation, and other cable components is a key issue that is likely to affect the ability of the currently installed cables to operate safely and reliably for another 20 to 40 years beyond the initial operating life. The development of one or more nondestructive evaluation (NDE) techniques and supporting models that could assist in determining the remaining life expectancy of cables or their current degradation state would be of significant interest. The ability to nondestructively determine material and electrical properties of cable jackets and insulation without disturbing the cables or connections has been deemed essential. Currently, the only technique accepted by industry to measure cable elasticity (the gold standard for determining cable insulation degradation) is the indentation measurement. All other NDE techniques are used to find flaws in the cable and do not provide information to determine the current health or life expectancy. There is no single NDE technique that can satisfy all of the requirements needed for making a life-expectancy determination, but a wide range of methods have been evaluated for use in NPPs as part of a continuous evaluation program. The commonly used methods are indentation and visual inspection, but these are only suitable for easily accessible cables. Several NDE methodologies using electrical techniques are in use today for flaw detection but there are none that can predict the life of a cable. There are, however, several physical and chemical ptoperty changes in cable insulation as a result of thermal and radiation damage. In principle, these properties may be targets for advanced NDE methods to provide early warning of aging and degradation. Examples of such key indicators include changes in chemical structure, mechanical modulus, and dielectric permittivity. While some of these indicators are the basis of currently used technologies, there is a need to increase the volume of cable that may be inspected with a single measurement, and if possible, to develop techniques for in-situ inspection (i.e., while the cable is in operation). This is the focus of the present report.

Simmons, Kevin L.; Fifield, Leonard S.; Westman, Matthew P.; Ramuhalli, Pradeep; Pardini, Allan F.; Tedeschi, Jonathan R.; Jones, Anthony M.

2013-09-27T23:59:59.000Z

139

T-705: Linux Kernel Weakness in Sequence Number Generation Facilitates  

Broader source: Energy.gov (indexed) [DOE]

05: Linux Kernel Weakness in Sequence Number Generation 05: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks T-705: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks August 30, 2011 - 3:46am Addthis PROBLEM: A remote user can conduct packet injection attacks. PLATFORM: Linux Kernel ABSTRACT: Linux Kernel Weakness in Sequence Number Generation Facilitates Packet Injection Attacks. reference LINKS: SecurityTracker Alert ID: 1025977 CVE-2011-3188 (under review) The Linux Kernel Archives IMPACT ASSESSMENT: Medium Discussion: A vulnerability was reported in the Linux Kernel. A remote user can conduct packet injection attacks. The kernel's sequence number generation function uses partial MD4 with 24-bits unguessable. A remote user may be able to brute-force guess a valid sequence number to inject a packet into a

140

Momentum broadening in weakly coupled quark-gluon plasma  

E-Print Network [OSTI]

We calculate the probability distribution P(k [subscript ?]) for the momentum perpendicular to its original direction of motion that an energetic quark or gluon picks up as it propagates through weakly coupled quark-gluon ...

D'Eramo, F.

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Inversion for elastic parameters in weakly anisotropic media  

Science Journals Connector (OSTI)

......propagation in inhomogeneous weakly anisotropic elastic media, J. geophys...2001. Ray tracing in anisotropic media with singularities...Measured anisotropy in Pierre shale, Geophys. Prospect., 31...approximation of ray theory for anisotropic media, Geophys. J. Int......

Xuyao Zheng

2004-12-01T23:59:59.000Z

142

Nuclear Constraints on the Weak Nucleon-Nucleon Interaction  

E-Print Network [OSTI]

I discuss the current status of efforts to constrain the strangeness-conserving weak hadronic interaction, which can be isolated in nuclear systems because of the associated parity violation.

W. C. Haxton

2008-02-21T23:59:59.000Z

143

Earth's Core Reveals an Inner Weakness | Advanced Photon Source  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

their results to core conditions and found that the strength of iron deep within the Earth is lower than previously thought. This weakness may explain how the crystal structure...

144

Imprints of dynamical dark energy on weak-lensing measurements  

Science Journals Connector (OSTI)

......Large Synoptic Survey Telescope...g. Joint Dark Energy Mission (JDEM...galaxy redshift surveys and the abundance...spectrum of dark energy P (k), as...to dynamical dark energy is potentially...weak-lensing surveys. The error......

Sirichai Chongchitnan; Lindsay King

2010-09-21T23:59:59.000Z

145

Environmental Metabolomics:? A SWOT Analysis (Strengths, Weaknesses, Opportunities, and Threats)  

Science Journals Connector (OSTI)

Environmental Metabolomics:? A SWOT Analysis (Strengths, Weaknesses, Opportunities, and Threats) ... An overall goal of environmental metabolomics is to understand what is metabolomically “normal” or adaptive and what constitutes a threat to human health and the environment. ...

Marion G. Miller

2007-01-04T23:59:59.000Z

146

Weak-value amplification as an optimal metrological protocol  

E-Print Network [OSTI]

The implementation of weak-value amplification requires the pre- and post-selection of states of a quantum system, followed by the observation of the response of the meter, which interacts weakly with the system. Data acquisition from the meter is conditioned to successful post-selection events. Here we derive an optimal post-selection procedure for estimating the coupling constant between system and meter, and show that it leads both to weak-value amplification and to the saturation of the quantum Fisher information, under conditions fulfilled by all previously reported experiments on the amplification of weak signals. For most of the pre-selected states, full information on the coupling constant can be extracted from the meter data set alone, while for a small fraction of the space of pre-selected states, it must be obtained from the post-selection statistics.

G. Bié Alves; B. M. Escher; R. L. de Matos Filho; N. Zagury; L. Davidovich

2014-10-27T23:59:59.000Z

147

Strong Effect of Weak Charging in Suspensions of Anisotropic Colloids  

E-Print Network [OSTI]

Suspensions of hard colloidal particles frequently serve as model systems in studies on fundamental aspects of phase transitions. But often colloidal particles that are considered as ``hard'' are in fact weakly charged. If the colloids are spherical, weak charging has a only a weak effect on the structural properties of the suspension, which can be easily corrected for. However, this does not hold for anisotropic particles. We introduce a model for the interaction potential between charged ellipsoids of revolution (spheroids) based on the Derjaguin approximation of Debye--H\\"uckel Theory and present a computer simulation study on aspects of the system's structural properties and phase behaviour. In line with previous experimental observations, we find that even a weak surface charge has a strong impact on the correlation functions. A likewise strong impact is seen on the phase behaviour, in particular, we find stable cubatic order in suspensions of oblate ellipsoids.

Sven Dorosz; Nikhilesh Shegokar; Tanja Schilling; Martin Oettel

2014-03-21T23:59:59.000Z

148

Ultra-weak sector, Higgs boson mass, and the dilaton  

SciTech Connect (OSTI)

The Higgs boson mass may arise from a portal coupling to a singlet field $\\sigma$ which has a very large VEV $f \\gg m_\\text{Higgs}$. This requires a sector of "ultra-weak" couplings $\\zeta_i$, where $\\zeta_i \\lesssim m_\\text{Higgs}^2 / f^2$. Ultra-weak couplings are technically naturally small due to a custodial shift symmetry of $\\sigma$ in the $\\zeta_i \\rightarrow 0$ limit. The singlet field $\\sigma$ has properties similar to a pseudo-dilaton. We engineer explicit breaking of scale invariance in the ultra-weak sector via a Coleman-Weinberg potential, which requires hierarchies amongst the ultra-weak couplings.

Allison, Kyle [University of Oxford; Hill, Christopher T. [FNAL; Ross, Graham G. [University of Oxford

2014-11-01T23:59:59.000Z

149

The Hadley Circulation and the Weak Temperature Gradient Approximation  

Science Journals Connector (OSTI)

The weak temperature gradient (WTG) approximation is applied to simple shallow-water models of the Hadley circulation. While it is difficult to formally justify the use of the WTG approximation for this problem, the derived WTG solutions are ...

L. M. Polvani; A. H. Sobel

2002-05-01T23:59:59.000Z

150

Proton's Weak Charge Determined for First Time | Jefferson Lab  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

force is one of the four fundamental forces in our universe, along with gravity, electromagnetism and the strong force. Although the weak force acts only on the sub-atomic level,...

151

Phase sensitivity of slow electrons to interactions with weak potentials  

SciTech Connect (OSTI)

The interaction of very slow electrons with weak potentials is investigated in an exactly soluble, one-dimensional quantum mechanical model. Slow electrons are produced by a decelerating ramp potential, as in experimental mirror electron microscopy, so the electrons can interact with a weak field as they slow and reverse direction. Our model provides a wave mechanical interpretation of this turning point region and suggests the possibility of imaging optical fields utilizing the phase of electron matter waves.

Kennedy, S. M.; Jesson, D. E.; Morgan, M. J.; Smith, A. E.; Barker, P. F. [School of Physics, Monash University, Victoria, 3800 (Australia); Department of Physics, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, EH144AS (United Kingdom)

2006-10-15T23:59:59.000Z

152

Medical Examiner/Coroner on the Handling of a Body/Human Remains that are Potentially Radiologically Contaminated  

Broader source: Energy.gov [DOE]

The purpose of this Model Procedure is to identify precautions and provide guidance to Medical Examiners/Coroners on the handling of a body or human remains that are potentially contaminated with...

153

An Attribute Analysis of Looted Skeletal Remains from the Site of Panquilma in the Lurin Valley of Peru  

E-Print Network [OSTI]

AN ATTRIBUTE ANALYSIS OF LOOTED SKELETAL REMAINS FROM THE SITE OF PANQUILMA IN THE LURIN VALLEY OF PERU An Undergraduate Research Scholars Thesis by COURTNEY VAN GEMERT Submitted to Honors and Undergraduate Research Texas A... ............................................................................................................................... 24 Skeletal Inventory ............................................................................................................. 24 MNI...

Van Gemert, Courtney

2013-09-28T23:59:59.000Z

154

Malaria Researchers Find Weakness in Global Killer | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Malaria Researchers Find Weakness in Global Killer Malaria Researchers Find Weakness in Global Killer Malaria Researchers Find Weakness in Global Killer February 1, 2012 - 9:16am Addthis The protozoan Plasmodium falciparum gliding through a cell in the gut of a mosquito, its primary host. Although five different species of Plasmodium can cause malaria, Plasmodium falciparum causes the most severe disease. | Photo courtesy of Wikipedia Commons. The protozoan Plasmodium falciparum gliding through a cell in the gut of a mosquito, its primary host. Although five different species of Plasmodium can cause malaria, Plasmodium falciparum causes the most severe disease. | Photo courtesy of Wikipedia Commons. Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science

155

Recovering information of tunneling spectrum from Weakly Isolated Horizon  

E-Print Network [OSTI]

In this paper we investigate the properties of tunneling spectrum from weakly isolated horizon(WIH). We find that there are correlations among Hawking radiations from weakly isolated horizon, the information can be carried out in terms of correlations between sequential emissions, and the radiation is an entropy conservation process. We generalize Refs.[11-13]' results to a more general spacetime. Through revisiting the calculation of tunneling spectrum of weakly isolated horizon, we find that Ref.[12]'s requirement that radiating particles have the same angular momenta of unit mass as that of black hole is not needed, and the energy and angular momenta of emitting particles are very arbitrary which should be restricted only by keeping the cosmic censorship of black hole.

Ge-Rui Chen; Yong-Chang Huang

2014-06-02T23:59:59.000Z

156

GAO-07-1036, CRITICAL INFRASTRUCTURE PROTECTION: Multiple Efforts to Secure Control Systems Are Under Way, but Challenges Remain  

Broader source: Energy.gov (indexed) [DOE]

Congressional Requesters Congressional Requesters CRITICAL INFRASTRUCTURE PROTECTION Multiple Efforts to Secure Control Systems Are Under Way, but Challenges Remain September 2007 GAO-07-1036 What GAO Found United States Government Accountability Office Why GAO Did This Study Highlights Accountability Integrity Reliability September 2007 CRITICAL INFRASTRUCTURE PROTECTION Multiple Efforts to Secure Control Systems Are Under Way, but Challenges Remain Highlights of GAO-07-1036, a report to congressional requesters Control systems-computer-based systems that monitor and control sensitive processes and physical functions-perform vital functions in many of our nation's critical infrastructures, including electric power, oil and gas, water treatment, and chemical production. The disruption of

157

Remaining Sites Verification Package for 100-F-38 Stained Soil Site, Waste Site Reclassification Form 2004-093  

SciTech Connect (OSTI)

The 100-F-38 Stained Soil site was an area of yellow stained soil that was discoverd while excavating a trench for the placement of electrical conduit. The 100-F-38 Stained Soil site meets the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling show demonstrate that residual contaminant concentrations support future unrestricted land uses that can be represented by a rural-residential scenario. The results also show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils and the contaminant concentrations remaining in the soil are protective of groundwater and the Columbia River.

R. A. Carlson

2006-03-13T23:59:59.000Z

158

Physical component analysis of galaxy cluster weak gravitational lensing data  

Science Journals Connector (OSTI)

......Optimization schemes for locating the best-fitting point...by weak-lensing data sets: we find the evidence...sample corresponds to a set of haloes that provide...a consequence of the domination of clusters by a single...methods: the natural basis set of elliptical NFW-profile......

Phil Marshall

2006-11-01T23:59:59.000Z

159

Weak field limit of Reissner-Nordström black hole lensing  

Science Journals Connector (OSTI)

We study gravitational lensing by a Reissner-Nordström black hole in the weak field limit. We obtain the basic equations for the deflection angle and time delay and find analytical expressions for the positions and amplifications of the primary and secondary images. Because of a net positive charge, the separation between images increases, but no change in the total magnification occurs.

Mauro Sereno

2004-01-13T23:59:59.000Z

160

Early Results from the Q{sub weak} Experiment  

SciTech Connect (OSTI)

A subset of results from the recently completed Jefferson Lab Q{sub weak} experiment are reported. This experiment, sensitive to physics beyond the Standard Model, exploits the small parity-violating asymmetry in elastic {vector e}p scattering to provide the first determination of the protons weak charge Q{sub w}{sup p}. The experiment employed a 180 {micro}A longitudinally polarized 1.16 GeV electron beam on a 35 cm long liquid hydrogen target. Scattered electrons corresponding to Q{sup 2} of 0.025 GeV{sup 2} were detected in eight Cerenkov detectors arrayed symmetrically around the beam axis. The goals of the experiment were to provide a measure of Q{sub w}{sup p} to 4.2 percent (combined statistical and systematic error), which implies a measure of sin2(thetaw) at the level of 0.3 percent, and to help constrain the vector weak quark charges C{sub 1u} and C{sub 1d}. The experimental method is described, with particular focus on the challenges associated with the worlds highest power LH{sub 2} target. The new constraints on C{sub 1u} and C{sub 1d} provided by the subset of the experiments data analyzed to date will also be shown, together with the extracted weak charge of the neutron.

Androic, D.; Armstrong, D.S.; Asaturyan, A.; Averett, T.; Balewski, J.; Beaufait, J.; Beminiwattha, R.S.; Benesch, J.; Benmokhtar, F.; Birchall, J.; Carlini, R.D.; Cates, G.D.; Cornejo, J.C.; Covrig, S.; Dalton, M.M.; Davis, C.A.; Deconinck, W.; Diefenbach, J.; Dowd, J.F.; Dunne, J.A.; Dutta, D.; Duvall, W.S.; Elaasar, M.; Falk, W.R.; Finn, J.M.; Forest, T.; Gaskel, D.; Gericke, M.T.W.; Grames, J.; Gray, V.M.; Grimm, K.; Guo, F.; Hoskins, J.R.; Johnston, K.; Jones, D.; Jones, M.; Jones, R.; Kargiantoulakis, M.; King, P.M.; Korkmaz, E.; Kowalski, S.; Leacock, J.; Leckey, J.; Lee, A.R.; Lee, J.H.; Lee, L.; MacEwan, S.; Mack, D.; Magee, J.A.; Mahurin, R.; Mammei, J.; Martin, J.; McHugh, M.J.; Meekins, D.; Mei, J.; Michaels, R.; Micherdzinska, A.; Mkrtchyan, A.; Mkrtchyan, H.; Morgan, N.; Myers, K.E.; Narayan, A.; Ndukum, L.Z.; Nelyubin, V.; W T H, Nuruzzaman; Oers, van; Opper, A.K.; Page, S.A.; Pan, J.; Paschke, K.; Phillips, S.K.; Pitt, M.L.; Poelker, M.; Rajotte, J.F.; Ramsay, W.D.; Roche, J.; Sawatzky, B.; Seva, T.; Shabestari, M.H.; Silwal, R.; Simicevic, N.; Smith, G.R.; Solvignon, P.; Spayde, D.T.; Subedi, A.; Subedi, R.; Suleiman, R.; Tadevosyan, V.; Tobias, W.A.; Tvaskis, V.; Waidyawansa, B.; Wang, P.; Wells, S.P.; Wood, S.A.; Yang, S.; Young, R.D.; Zhamkochyan, S.

2014-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Computations of Hypersonic Weakly Ionised Flows using a Relaxation Scheme  

E-Print Network [OSTI]

Computations of Hypersonic Weakly Ionised Flows using a Relaxation Scheme Olivier Rouzaud ONERA to classical Riemann solvers. Thus, we propose a re- laxation scheme adapted to the treatment of hypersonic of large Mach num- ber flows corresponding to hypersonic flows around reentry bodies. At high speeds

Chalons, Christophe

162

INTRODUCTION Weakly electric fish generate an electric organ discharge (EOD)  

E-Print Network [OSTI]

4196 INTRODUCTION Weakly electric fish generate an electric organ discharge (EOD) that results in an electric field that surrounds the fish's body. In Eigenmannia, the EOD is quasi-sinusoidal and when fish are in close proximity (~1m or less) their EODs interact. In the case of two nearby conspecifics, the combined

163

Inversion of borehole weak motion records observed in Istanbul (Turkey)  

Science Journals Connector (OSTI)

......sets, might be large. This indicates...the inversion of borehole weak and strong...2005 December, a drilling program consisting...the 140-m-deep borehole, based on the encountered...applicable also to borehole sites where other...velocities (with a large change of impedance......

S. Parolai; R. Wang; D. Bindi

2012-02-01T23:59:59.000Z

164

Hopfield Neural Network deconvolution for weak lensing measurement  

E-Print Network [OSTI]

Weak gravitational lensing has the potential to place tight constraints on the equation of the state of dark energy. However, this will only be possible if shear measurement methods can reach the required level of accuracy. We present a new method to measure the ellipticity of galaxies used in weak lensing surveys. The method makes use of direct deconvolution of the data by the total Point Spread Function (PSF). We adopt a linear algebra formalism that represents the PSF as a Toeplitz matrix. This allows us to solve the convolution equation by applying the Hopfield Neural Network iterative scheme. The ellipticity of galaxies in the deconvolved images are then measured using second order moments of the autocorrelation function of the images. To our knowledge, it is the first time full image deconvolution is used to measure weak lensing shear. We apply our method to the simulated weak lensing data proposed in the GREAT10 challenge and obtain a quality factor of Q=87. This result is obtained after applying image...

Nurbaeva, Guldariya; Courbin, Frederic; Meylan, Georges

2014-01-01T23:59:59.000Z

165

Non-Autonomous Systems: Asymptotic Behaviour and Weak Invariance Principles *  

E-Print Network [OSTI]

Non-Autonomous Systems: Asymptotic Behaviour and Weak Invariance Principles * H Logemann & E P Ryan@maths.bath.ac.uk Results pertaining to asymptotic behaviour of solutions of non-autonomous ordinary di#11;erential asymptotically autonomous systems and adaptively controlled systems are highlighted. Key Words: adaptive control

Bath, University of

166

TRANSMISSION ELECTRON MICROSCOPY OF WEAKLY DEFORMED ALKALI HALIDE CRYSTALS  

E-Print Network [OSTI]

377 TRANSMISSION ELECTRON MICROSCOPY OF WEAKLY DEFORMED ALKALI HALIDE CRYSTALS H. STRUNK Max'importance croissante du durcissement de la solution solide. Abstract. 2014 Transmission electron microscopy (TEM Abstracts 7j66 - 7 I' 1. Introduction. - It is only some years ago that transmission electron microscopy

Boyer, Edmond

167

WEAK SUBINTEGRALITY AND INVERTIBLE MODULES IN GRADED RINGS  

E-Print Network [OSTI]

WEAK SUBINTEGRALITY AND INVERTIBLE MODULES IN GRADED RINGSB=A : B=A ! I (A?, B?). Here A? is the divided power algebra associated with A, which is the ring having, then the homomorphism iB=A : B=A ! I (A?, B?) is an isomorphism. A key new observation used in the proof

Roberts, Leslie

168

Weak interactions of quarks and leptons: experimental status  

SciTech Connect (OSTI)

The present experimental status of weak interactions is discussed with emphasis on the problems and questions and on the possible lines of future investigations. Major topics include; (1) the quark mixing matrix, (2) CP violation, (3) rare decays, (4) the lepton sector, and (5) right handed currents. 118 references. (WHK)

Wojcicki, S.

1984-09-01T23:59:59.000Z

169

Periodic Orbits in Triaxial Galaxies with Weak Cusps  

E-Print Network [OSTI]

The orbital structure of triaxial models with weak central density cusps, $\\rho\\propto r^{-\\gamma}, gamma fish boxlets in the $x-z$ (long axis-short axis) plane are stable over a wide range of model parameters. The boxlets in the $x-y$ and $y-z$ planes are generally vertically unstable.

Tema Fridman; David Merritt

1997-05-19T23:59:59.000Z

170

Copeia, 2005(1), pp. 4860 Nesting and Paternal Care in the Weakly Electric Fish  

E-Print Network [OSTI]

(Hypopomidae) in Surinam but no parental care was implicated. Parental care is unknown in other weakly

Hopkins, Carl D.

171

Proceedings: EPRI Workshop on Condition and Remaining Life Assessment of Hot Gas Path Components of Combustion Turbines  

SciTech Connect (OSTI)

The severity of modern combustion turbine operation is a reflection of industry competition to achieve higher thermal efficiency. This competitive stance has resulted in new turbine designs and material systems that have at times outpaced condition and remaining life assessment (CARLA) technology. These proceedings summarize a two-day workshop on CARLA technology for hot section components of large combustion turbines.

None

2000-05-01T23:59:59.000Z

172

A Joint Programme of: "Water will remain a strategic resource for countries worldwide, and the quest for water  

E-Print Network [OSTI]

A Joint Programme of: "Water will remain a strategic resource for countries worldwide, and the quest for water sustainability will become increasingly intricate and delicate. A keen understanding of governance issues and policy options will continue to be a key consideration to better water resource

Chaudhuri, Sanjay

173

SUPPORT FUSION ENERGY SCIENCES IN FY 2013 HELP THE UNITED STATES REMAIN A WORLD LEADER IN FUSION RESEARCH  

E-Print Network [OSTI]

SUPPORT FUSION ENERGY SCIENCES IN FY 2013 HELP THE UNITED STATES REMAIN A WORLD LEADER IN FUSION RESEARCH RESTORE FUNDING FOR THE DOMESTIC FUSION PROGRAM AND MAINTAIN OUR COMMITMENT TO ITER the goals of the U.S. fusion program. To realize the promise of participation in ITER, cultivate future

174

Reply to Evans: Use of poison remains the most parsimonious explanation for Border Cave castor bean extract  

Science Journals Connector (OSTI)

...Norway;cBernard Price Institute for...Italy;cBernard Price Institute for...present in castor oil, including ricinoleic...submitted to moderate heating while still remaining toxic. Heating of the compound most...residues of plant oils and animal fats...

Francesco d’Errico; Lucinda Backwell; Paola Villa; Ilaria Degano; Jeannette J. Lucejko; Marion K. Bamford; Thomas F. G. Higham; Maria Perla Colombini; Peter B. Beaumont

2012-01-01T23:59:59.000Z

175

14 The College will remain primarily a residential university, offering research-led education in science, engineering, medicine and busi-  

E-Print Network [OSTI]

14 The College will remain primarily a residential university, offering research-led education at the College. · To provide a research-led education of the highest international quality within and practical experience Research-led education Intellectualand professionaldevelopment UG PGT PGR Imperial

176

On a slow drift of a massive piston in an ideal gas that remains at mechanical equilibrium  

E-Print Network [OSTI]

On a slow drift of a massive piston in an ideal gas that remains at mechanical equilibrium N@math.uab.edu Fax: 1-205-934-9025 February 18, 2004 Abstract We consider a heavy piston in an infinite cylinder surrounded by ideal gases on both sides. The piston moves under elastic collisions with gas atoms. We assume

Chernov, Nikolai

177

Predicting the Remaining Useful Lifetime of a Proton Exchange Membrane Fuel Cell using an Echo State Network  

E-Print Network [OSTI]

1 Predicting the Remaining Useful Lifetime of a Proton Exchange Membrane Fuel Cell using an Echo industrial Fuel Cell (FC) application resides in the system limited useful lifetime. Consequently, it Membrane Fuel Cell using an iterative predictive structure, which is the most common approach performing

Boyer, Edmond

178

As the Division of Social Sciences at UC Santa Cruz moves forward, it remains sharply focused on the study  

E-Print Network [OSTI]

As the Division of Social Sciences at UC Santa Cruz moves forward, it remains sharply focused and new fields in the social sciences. Research, both disciplinary and interdisciplin- ary, has a major, and knowledge; environment and sus- tainable development; globalization and governance; science, technology

California at Santa Cruz, University of

179

Microsoft Word - AL 2010-07 Acquistion Letters Remaining in Effect May 2010 revision 1 June 2010  

Broader source: Energy.gov (indexed) [DOE]

No. AL 2010-07 Rev. 1 No. AL 2010-07 Rev. 1 Acquisition Regulation Date 06/01/2010 ACQUISITION LETTER This Acquisition Letter is issued under the authority of the DOE and NNSA Senior Procurement Executives. Acquisition Letters (AL) that remain in effect are identified below. All other previously issued ALs have been superseded by a formal rule-making, incorporated into other guidance, and/or canceled. * * * * * * * * * * * * * * * * ACQUISITION LETTERS REMAINING IN EFFECT NUMBER DATE SUBJECT 93-4 04/07/1993 Displaced Workers Benefits Program 94-19 12/09/1994 Basic Labor Policies Fringe Benefits 95-06 06/28/1995 Personal Property Letter System 2000-09 11/11/2000 Source Selection Authority 2005-11 07/15/2005 Home Office Expenses for Management and

180

Sensitivity studies for the weak r process: neutron capture rates  

SciTech Connect (OSTI)

Rapid neutron capture nucleosynthesis involves thousands of nuclear species far from stability, whose nuclear properties need to be understood in order to accurately predict nucleosynthetic outcomes. Recently sensitivity studies have provided a deeper understanding of how the r process proceeds and have identified pieces of nuclear data of interest for further experimental or theoretical study. A key result of these studies has been to point out the importance of individual neutron capture rates in setting the final r-process abundance pattern for a ‘main’ (A ? 130 peak and above) r process. Here we examine neutron capture in the context of a ‘weak’ r process that forms primarily the A ? 80 r-process abundance peak. We identify the astrophysical conditions required to produce this peak region through weak r-processing and point out the neutron capture rates that most strongly influence the final abundance pattern.

Surman, R., E-mail: surmanr@union.edu [Department of Physics and Astronomy, Union College, Schenectady, NY 12308 (United States); Mumpower, M. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)] [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Sinclair, R.; Jones, K. L. [Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States)] [Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States); Hix, W. R. [Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States) [Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996 (United States); Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831 (United States); McLaughlin, G. C. [Department of Physics, North Carolina State University, Raleigh, NC 27695 (United States)] [Department of Physics, North Carolina State University, Raleigh, NC 27695 (United States)

2014-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Homotopy Theory of Strong and Weak Topological Insulators  

E-Print Network [OSTI]

We use homotopy theory to extend the notion of strong and weak topological insulators to the non-stable regime (low numbers of occupied/empty energy bands). We show that for strong topological insulators in d spatial dimensions to be "truly d-dimensional", i.e. not realizable by stacking lower-dimensional insulators, a more restrictive definition of "strong" is required. However, this does not exclude weak topological insulators from being "truly d-dimensional", which we demonstrate by an example. Additionally, we prove some useful technical results, including the homotopy theoretic derivation of the factorization of invariants over the torus into invariants over spheres in the stable regime, as well as the rigorous justification of replacing $T^d$ by $S^d$ and $T^{d_k}\\times S^{d_x}$ by $S^{d_k+d_x}$ as is common in the current literature.

Ricardo Kennedy; Charles Guggenheim

2014-09-08T23:59:59.000Z

182

The impact of cosmic variance on simulating weak lensing surveys  

E-Print Network [OSTI]

Upcoming weak lensing surveys will survey large cosmological volumes to measure the growth of cosmological structure with time and thereby constrain dark energy. One major systematic uncertainty in this process is the calibration of the weak lensing shape distortions, or shears. Most upcoming surveys plan to test several aspects of their shear estimation algorithms using sophisticated image simulations that include realistic galaxy populations based on high-resolution data from the Hubble Space Telescope (HST). However, existing datasets from the (HST) cover very small cosmological volumes, so cosmic variance could cause the galaxy populations in them to be atypical. A narrow redshift slice from such surveys could be dominated by a single large overdensity or underdensity. In that case, the morphology-density relation could alter the local galaxy populations and yield an incorrect calibration of shear estimates as a function of redshift. We directly test this scenario using the COSMOS survey, the largest-area...

Kannawadi, Arun; Lackner, Claire

2014-01-01T23:59:59.000Z

183

Anomalous skin effects in a weakly magnetized degenerate electron plasma  

SciTech Connect (OSTI)

Fully relativistic analysis of anomalous skin effects for parallel propagating waves in a weakly magnetized degenerate electron plasma is presented and a graphical comparison is made with the results obtained using relativistic Maxwellian distribution function [G. Abbas, M. F. Bashir, and G. Murtaza, Phys. Plasmas 18, 102115 (2011)]. It is found that the penetration depth for R- and L-waves for degenerate case is qualitatively small in comparison with the Maxwellian plasma case. The quantitative reduction due to weak magnetic field in the skin depth in R-wave for degenerate plasma is large as compared to the non-degenerate one. By ignoring the ambient magnetic field, previous results for degenerate field free case are salvaged [A. F. Alexandrov, A. S. Bogdankevich, and A. A. Rukhadze, Principles of Plasma Electrodynamics (Springer-Verlag, Berlin/Heidelberg, 1984), p. 90].

Abbas, G., E-mail: gohar.abbas@gcu.edu.pk; Sarfraz, M. [Department of Physics, GC University Lahore, Katchery Road, Lahore 54000 (Pakistan); Shah, H. A. [Forman Christian College University, Farozpur Road, Lahore 54600 (Pakistan)

2014-09-15T23:59:59.000Z

184

Experimental feedback control of quantum systems using weak measurements  

E-Print Network [OSTI]

A goal of the emerging field of quantum control is to develop methods for quantum technologies to function robustly in the presence of noise. Central issues are the fundamental limitations on the available information about quantum systems and the disturbance they suffer in the process of measurement. In the context of a simple quantum control scenario--the stabilization of non-orthogonal states of a qubit against dephasing--we experimentally explore the use of weak measurements in feedback control. We find that, despite the intrinsic difficultly of implementing them, weak measurements allow us to control the qubit better in practice than is even theoretically possible without them. Our work shows that these more general quantum measurements can play an important role for feedback control of quantum systems.

G. G. Gillett; R. B. Dalton; B. P. Lanyon; M. P. Almeida; M. Barbieri; G. J. Pryde; J. L. O'Brien; K. J. Resch; S. D. Bartlett; A. G. White

2010-03-01T23:59:59.000Z

185

Gravitational Faraday rotation in a weak gravitational field  

Science Journals Connector (OSTI)

We examine the rotation of the plane of polarization for linearly polarized light rays by the weak gravitational field of an isolated physical system. Based on the rotation of inertial frames, we review the general integral expression for the net rotation. We apply this formula, an analogue to the usual electromagnetic Faraday effect, to some interesting astrophysical systems, namely uniformly shifting mass monopoles and a spinning external shell.

Mauro Sereno

2004-04-08T23:59:59.000Z

186

Gravitational Faraday rotation in a weak gravitational field  

E-Print Network [OSTI]

We examine the rotation of the plane of polarization for linearly polarized light rays by the weak gravitational field of an isolated physical system. Based on the rotation of inertial frames, we review the general integral expression for the net rotation. We apply this formula, analogue to the usual electromagnetic Faraday effect, to some interesting astrophysical systems: uniformly shifting mass monopoles and a spinning external shell.

Mauro Sereno

2004-01-15T23:59:59.000Z

187

Microwave studies of weak localization and antilocalization in epitaxial graphene  

SciTech Connect (OSTI)

A microwave detection method was applied to study weak localization and antilocalization in epitaxial graphene sheets grown on both polarities of SiC substrates. Both coherence and scattering length values were obtained. The scattering lengths were found to be smaller for graphene grown on C-face of SiC. The decoherence rate was found to depend linearly on temperature, showing the electron-electron scattering mechanism.

Drabi?ska, Aneta; Kami?ska, Maria [Faculty of Physics, University of Warsaw, ul. Ho?a 69, 00-681 Warsaw (Poland); Wo?o?, Agnieszka [Faculty of Physics, University of Warsaw, ul. Ho?a 69, 00-681 Warsaw, Poland and Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw (Poland); Strupinski, Wlodek [Institute of Electronic Materials Technology, ul. Wólczyñska 133, 01-919 Warsaw (Poland); Baranowski, J. M. [Faculty of Physics, University of Warsaw, ul. Ho?a 69, 00-681 Warsaw, Poland and Institute of Electronic Materials Technology, ul. Wólczyñska 133, 01-919 Warsaw (Poland)

2013-12-04T23:59:59.000Z

188

Coherence oscillations between weakly coupled Bose-Hubbard dimers  

Science Journals Connector (OSTI)

We study theoretically the dynamics of two weakly coupled Bose-Josephson junctions, prepared with the same particle number N and Josephson excitation number ? but with different reduced one-particle purity ?. An entropy oscillation mode is predicted, in which one-particle coherence is transferred between the Bose-Hubbard dimers with no particle or energy transfer. We explain this purity oscillation using a semiclassical picture.

Christine Khripkov and Amichay Vardi

2014-05-30T23:59:59.000Z

189

Weakly screened thermonuclear reactions in astrophysical plasmas: Improving Salpeter's model  

E-Print Network [OSTI]

This paper presents a detailed study of the electron degeneracy and nonlinear screening effects which play a crucial role in the validity of Salpeter's weak-screening model. The limitations of that model are investigated and an improved one is proposed which can take into account nonlinear screening effects. Its application to the solar pp reaction derives an accurate screening enhancement factor and provides a very reliable estimation of the associated neutrino flux uncertanties.

Theodore E. Liolios

2003-06-23T23:59:59.000Z

190

First Determination of the Weak Charge of the Proton  

SciTech Connect (OSTI)

The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment's commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these initial results the measured asymmetry is A_e_p = -279 +- 35 (statistics) +- 31 (systematics) ppb, which is the smallest and most precise asymmetry ever measured in polarized e-p scattering. The small Q^2 of this experiment has made possible the first determination of the weak charge of the proton, Q^p_W, by incorporating earlier parity-violating electron scattering (PVES) data at higher Q^2 to constrain hadronic corrections. The value of Q^p_W obtained in this way is Q^p_W(PVES) = 0.064 +- 0.012, in good agreement with the Standard Model prediction of Q^p_W(SM) = 0.0710 +- 0.0007. When this result is further combined with the Cs atomic parity violation (APV) measurement, significant constraints on the weak charges of the up and down quarks can also be extracted. That PVES+APV analysis reveals the neutron's weak charge to be Q^n_W(PVES+APV) = -0.975 +- 0.010.

Androic, D; Armstrong, D S; Asaturyan, A; Averett, T; Balewski, J; Beaufait, J; Beminiwattha, R S; Benesch, J; Benmokhtar, F; Birchall, J; Carlini, R D [JLAB; Cates, G D; Cornejo, J C; Covrig, S; Dalton, M M; Davis, C A; Deconinck, W; Diefenbach, J; Dowd, J F; Dunne, J A; Dutta, D; Duvall, W S; Elaasar, M; Falk, W R; Finn, J M; Forest, T; Gaskell, D; Gericke, M T. W.; Grames, J; Gray, V M; Grimm, K; Guo, F; Hoskins, J R; Johnston, K; Jones, D; Jones, M; Jones, R; Kargiantoulakis, M; King, P M; Korkmaz, E; Kowalski, S; Leacock, J; Leckey, J; Lee, A R; Lee, J H; Lee, L; MacEwan, S; Mack, D; Magee, J A; Mahurin, R; Mammei, J; Martin, J W; McHugh, M J; Meekins, D; Mei, J; Michaels, R; Micherdzinska, A; Mkrtchyan, A; Mkrtchyan, H; Morgan, N; Myers, K E; Narayan, A; Ndukum, L Z; Nelyubin, V; van Oers, W T H; Nuruzzaman,; Opper, A K; Page, S A; Pan, J; Paschke, K D; Phillips, S K; Pitt, M L; Poelker, M; Rajotte, J F; Ramsay, W D; Roche, J; Sawatzky, B; Seva, T; Shabestari, M H; Silwal, R; Simicevic, N; Smith, G R; Solvignon, P; Spayde, D T; Subedi, A; Subedi, R; Suleiman, R; Tadevosyan, V; Tobias, W A; Tvaskis, V; Waidyawansa, B; Wang, P; Wells, S P; Wood, S A; Yang, S; Young, R D; Zhamkochyan, S

2013-10-01T23:59:59.000Z

191

First Determination of the Weak Charge of the Proton  

E-Print Network [OSTI]

The Qweak experiment has measured the parity-violating asymmetry in polarized e-p elastic scattering at Q^2 = 0.025(GeV/c)^2, employing 145 microamps of 89% longitudinally polarized electrons on a 34.4cm long liquid hydrogen target at Jefferson Lab. The results of the experiment's commissioning run are reported here, constituting approximately 4% of the data collected in the experiment. From these initial results the measured asymmetry is Aep = -279 +- 35 (statistics) +- 31 (systematics) ppb, which is the smallest and most precise asymmetry ever measured in polarized e-p scattering. The small Q^2 of this experiment has made possible the first determination of the weak charge of the proton, QpW, by incorporating earlier parity-violating electron scattering (PVES) data at higher Q^2 to constrain hadronic corrections. The value of QpW obtained in this way is QpW(PVES) = 0.064 +- 0.012, in good agreement with the Standard Model prediction of QpW(SM) = 0.0710 +- 0.0007. When this result is further combined with the Cs atomic parity violation (APV) measurement, significant constraints on the weak charges of the up and down quarks can also be extracted. That PVES+APV analysis reveals the neutron's weak charge to be QnW(PVES+APV) = -0.975 +- 0.010.

Qweak Collaboration; D. Androic; D. S. Armstrong; A. Asaturyan; T. Averett; J. Balewski; J. Beaufait; R. S. Beminiwattha; J. Benesch; F. Benmokhtar; J. Birchall; R. D. Carlini; G. D. Cates; J. C. Cornejo; S. Covrig; M. M. Dalton; C. A. Davis; W. Deconinck; J. Diefenbach; J. F. Dowd; J. A. Dunne; D. Dutta; W. S. Duvall; M. Elaasar; W. R. Falk; J. M. Finn; T. Forest; D. Gaskell; M. T. W. Gericke; J. Grames; V. M. Gray; K. Grimm; F. Guo; J. R. Hoskins; K. Johnston; D. Jones; M. Jones; R. Jones; M. Kargiantoulakis; P. M. King; E. Korkmaz; S. Kowalski; J. Leacock; J. Leckey; A. R. Lee; J. H. Lee; L. Lee; S. MacEwan; D. Mack; J. A. Magee; R. Mahurin; J. Mammei; J. W. Martin; M. J. McHugh; D. Meekins; J. Mei; R. Michaels; A. Micherdzinska; A. Mkrtchyan; H. Mkrtchyan; N. Morgan; K. E. Myers; A. Narayan; L. Z. Ndukum; V. Nelyubin; Nuruzzaman; W. T. H van Oers; A. K. Opper; S. A. Page; J. Pan; K. D. Paschke; S. K. Phillips; M. L. Pitt; M. Poelker; J. F. Rajotte; W. D. Ramsay; J. Roche; B. Sawatzky; T. Seva; M. H. Shabestari; R. Silwal; N. Simicevic; G. R. Smith; P. Solvignon; D. T. Spayde; A. Subedi; R. Subedi; R. Suleiman; V. Tadevosyan; W. A. Tobias; V. Tvaskis; B. Waidyawansa; P. Wang; S. P. Wells; S. A. Wood; S. Yang; R. D. Young; S. Zhamkochyan

2013-09-02T23:59:59.000Z

192

Constraining dark energy from the abundance of weak gravitational lenses  

E-Print Network [OSTI]

We examine the prospect of using the observed abundance of weak gravitational lenses to constrain the equation-of-state parameter w of the dark energy. Here we solve the spherical-collapse model with dark energy, clarifying some ambiguities found in the literature, and provide fitting formulas for the overdensity at virialization and the linear-theory overdensity at collapse. We then compute the variation in the predicted weak-lens abundance with w. We find that the predicted redshift distribution and number count of weak lenses are highly degenerate in w and \\Omega_0. If we fix \\Omega_0 the number count for w=-2/3 is a factor of 2 smaller than for the \\LambdaCDM model. However, if we allow \\Omega_0 to vary with w such that the amplitude of the matter power spectrum as measured by COBE matches that obtained from the X-ray cluster abundance, the decrease in the predicted lens abundance is less than 25% for -1 40 degree^2 in order for the number count to differentiate a \\LambdaCDM cosmology from a w=-0.9 model...

Weinberg, N N; Weinberg, Nevin N.; Kamionkowski, Marc

2003-01-01T23:59:59.000Z

193

Sovereign Debt, Volatility and Insurance  

E-Print Network [OSTI]

Borensztein, E. and P Mauro [2004], ‘‘GDP-indexed Bonds,’’suggested by Borensztein and Mauro [2004] most recently. Theshould be feasible. Borensztein and Mauro [2004] discuss the

Kletzer, Kenneth

2005-01-01T23:59:59.000Z

194

Analysis of long-term impacts of TRU waste remaining at generator/storage sites for No Action Alternative 2  

SciTech Connect (OSTI)

This report is a supplement to the Waste Isolation Pilot Plant Disposal-Phase Final Supplemental Environmental Impact Statement (SEIS-II). Described herein are the underlying information, data, and assumptions used to estimate the long-term human-health impacts from exposure to radionuclides and hazardous chemicals in transuranic (TRU) waste remaining at major generator/storage sites after loss of institutional control under No Action Alternative 2. Under No Action Alternative 2, TRU wastes would not be emplaced at the Waste Isolation Pilot Plant (WIPP) but would remain at generator/storage sites in surface or near-surface storage. Waste generated at smaller sites would be consolidated at the major generator/storage sites. Current TRU waste management practices would continue, but newly generated waste would be treated to meet the WIPP waste acceptance criteria. For this alternative, institutional control was assumed to be lost 100 years after the end of the waste generation period, with exposure to radionuclides and hazardous chemicals in the TRU waste possible from direct intrusion and release to the surrounding environment. The potential human-health impacts from exposure to radionuclides and hazardous chemicals in TRU waste were analyzed for two different types of scenarios. Both analyses estimated site-specific, human-health impacts at seven major generator/storage sites: the Hanford Site (Hanford), Idaho National Engineering and Environmental Laboratory (INEEL), Lawrence Livermore National Laboratory (LLNL), Los Alamos National Laboratory (LANL), Oak Ridge National Laboratory (ORNL), Rocky Flats Environmental Technology Site (RFETS), and Savannah River Site (SRS). The analysis focused on these seven sites because 99 % of the estimated TRU waste volume and inventory would remain there under the assumptions of No Action Alternative 2.

Buck, J.W.; Bagaasen, L.M.; Bergeron, M.P.; Streile, G.P. [and others

1997-09-01T23:59:59.000Z

195

Remaining Sites Verification Package for the 128-B-3 Burn Pit Site, Waste Site Reclassification Form 2006-058  

SciTech Connect (OSTI)

The 128-B-3 waste site is a former burn and disposal site for the 100-B/C Area, located adjacent to the Columbia River. The 128-B-3 waste site has been remediated to meet the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling demonstrated that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results of sampling at upland areas of the site also showed that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2006-11-17T23:59:59.000Z

196

Remaining Sites Verification Package for the 100-B-24 Spillway, Waste Site Reclassification Form 2006-051  

SciTech Connect (OSTI)

The 100-B-24 Spillway is a spillway that was designed to serve as an emergency discharge point for the 116-B-7 outfall in the event that the 100-B-15 river effluent pipelines were blocked, damaged, or undergoing maintenance. The site meets the remedial action objectives specified in the Remaining Sites ROD. The results of confirmatory sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2006-09-18T23:59:59.000Z

197

Dissimilar-welded failure analysis and development: Volume 6, Weld condition and remaining life assessment manual: Final report  

SciTech Connect (OSTI)

Step-by-step guidelines contained in a new engineering manual explain how to evaluate dissimilar metal weld loadings, assess the current state of damage, and predict remaining weld life. Suggested plant and operational modifications will help utility personnel identify root causes and avoid additional failures in a given boiler. Failure of dissimilar metal welds (DMWs) between the austenitic and ferritic steel tubing used in superheaters and reheaters constitutes a major cause of forced outages in fossil boilers. EPRI has undertaken a study of DMWs, reported in volumes 1-6 of this nine-volume series, to provide utilities with a systematic approach for identifying root causes, remedying identified problems, and estimating remaining DMW useful life. This manual follows the three-phase approach outlined in the EPRI guidelines for life extension (report CS-4778). The investigators subjected the samples to detailed metallurgical examination and established correlations among operating conditions, system stresses, and the extent of observed DMW cracking. These correlations were quantified in the PODIS computer code (prediction of damage in service code; EPRI report CS-4252, volume 7). The investigators documented this information in a manual explaining how to carry out life assessment of DMWs. These guidelines describe an analytic procedure that computes the current level of DMW damage based on operating temperature, the number and nature of cycles, and system stresses. They explain a procedure for supplementary destructive examinations to verify the analytic predictions. 10 refs., 20 figs., 2 tabs.

Not Available

1988-08-01T23:59:59.000Z

198

A method to estimate the size and remaining market potential of the U.S. ESCO (energy service company) industry  

Science Journals Connector (OSTI)

Abstract This study presents a method to estimate the market investment potential for ESPC (energy-saving performance contracts) and annual blended energy savings remaining in buildings typically addressed by U.S. \\{ESCOs\\} (energy service companies). We define \\{ESCOs\\} as companies for whom performance-based contracting is a core business activity. The market potential analysis incorporates market penetration estimates provided by industry experts in late 2012, data on U.S. building stock typically addressed by ESCOs, and typical project investment costs from a database of 4000 + projects. ESCO industry revenue growth significantly outpaced U.S. GDP (gross domestic product) growth during 2009–2011. We estimate that the remaining investment potential in facilities typically addressed by the ESCO industry ranges from ?$71 to $133 billion. Our analysis includes ESCO industry size and growth projections drawing on information from interviews with ESCO executives conducted in late 2012. The U.S. ESCO industry could grow in size from $6 billion in 2013 to ?$7.5 billion by 2014, but this growth is contingent on enabling policies. The U.S. ESCO industry is similar in size to the ESCO industries in Germany, France, and China. Our estimation approach could be adapted for other countries with the caveat that ESCO industry definitions and revenue reporting practices vary across countries.

Elizabeth Stuart; Peter H. Larsen; Charles A. Goldman; Donald Gilligan

2014-01-01T23:59:59.000Z

199

New weakly coupled forces hidden in low-energy QCD  

Science Journals Connector (OSTI)

Is it possible to detect a new weakly coupled force at the QCD scale that interacts primarily with quarks? This work investigates experimental signatures of a new MeV–GeV gauge boson that couples to the baryon number, with attention to the 100 MeV–GeV mass range that is the regime of nonperturbative QCD. Such a state can be searched for in rare radiative decays of light mesons (?,??,?,?) as a ?0? resonance, which is its leading decay mode from 140 to 620 MeV. This is a new discovery window for forces beyond the Standard Model that is not covered by existing dark photon searches.

Sean Tulin

2014-06-05T23:59:59.000Z

200

Lattice Boltzmann method for weakly ionized isothermal plasmas  

Science Journals Connector (OSTI)

In this paper, a lattice Boltzmann method (LBM) for weakly ionized isothermal plasmas is presented by introducing a rescaling scheme for the Boltzmann transport equation. Without using this rescaling, we found that the nondimensional relaxation time used in the LBM is too large and the LBM does not produce physically realistic results. The developed model was applied to the electrostatic wave problem and the diffusion process of singly ionized helium plasmas with a 1–3% degree of ionization under an electric field. The obtained results agree well with theoretical values.

Huayu Li and Hyungson Ki

2007-12-21T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Lattice Boltzmann method for weakly ionized isothermal plasmas  

SciTech Connect (OSTI)

In this paper, a lattice Boltzmann method (LBM) for weakly ionized isothermal plasmas is presented by introducing a rescaling scheme for the Boltzmann transport equation. Without using this rescaling, we found that the nondimensional relaxation time used in the LBM is too large and the LBM does not produce physically realistic results. The developed model was applied to the electrostatic wave problem and the diffusion process of singly ionized helium plasmas with a 1-3% degree of ionization under an electric field. The obtained results agree well with theoretical values.

Li Huayu; Ki, Hyungson [Department of Mechanical Engineering, Michigan State University, East Lansing, Michigan 48824-1226 (United States)

2007-12-15T23:59:59.000Z

202

Self-gravitating line sources of weak hypercharge  

E-Print Network [OSTI]

We explore the role of the Cremmer-Scherk mechanism in the context of low energy effective string theory by coupling the antisymmetric 3-form gauge potential to an Abelian gauge potential carrying weak hypercharge. The theory admits a class of exact self-gravitating solutions in the spontaneously broken phase in which the dual fields acquire massive perturbative modes. Despite the massive nature of these fields they admit non-perturbative progressive longitudinal modes that together with pp-type gravitational waves travel in a direction of a line source at the speed of light.

T. Dereli; R. W. Tucker

1999-02-19T23:59:59.000Z

203

Mechanical squeezing via parametric amplification and weak measurement  

E-Print Network [OSTI]

Nonlinear forces allow motion of a mechanical oscillator to be squeezed below the zero-point motion. Of existing methods, mechanical parametric amplification is relatively accessible, but previously thought to be limited to 3dB of squeezing in the steady state. We consider the effect of applying continuous weak measurement and feedback to this system. If the parametric drive is optimally detuned from resonance, correlations between the quadratures of motion allow unlimited steady-state squeezing. Compared to back-action evasion, we demonstrate that the measurement strength, temperature and efficiency requirements for quantum squeezing are significantly relaxed.

Alex Szorkovszky; Andrew C. Doherty; Glen I. Harris; Warwick P. Bowen

2011-09-30T23:59:59.000Z

204

Neutrino Mass and Dark Energy from Weak Lensing  

Science Journals Connector (OSTI)

Weak gravitational lensing of background galaxies by intervening matter directly probes the mass distribution in the Universe. This distribution is sensitive to both the dark energy and neutrino mass. We examine the potential of lensing experiments to measure features of both simultaneously. Focusing on the radial information contained in a future deep 4000??deg2 survey, we find that the expected (1-?) error on a neutrino mass is 0.1 eV, if the dark-energy parameters are allowed to vary. The constraints on dark-energy parameters are similarly restrictive, with errors on w of 0.09.

Kevork N. Abazajian and Scott Dodelson

2003-07-24T23:59:59.000Z

205

Experimental method to find weak bond distribution functions in a high-temperature superconductor  

Science Journals Connector (OSTI)

A simple phenomenological model of a weakly bonded superconductor is suggested. The model considers the transition from a single weak dangling bond to a disruptive two-dimensional structure in taking the I–V char...

M. A. Vasyutin

2013-11-01T23:59:59.000Z

206

A CLIPPING METHOD TO MITIGATE THE IMPACT OF CATASTROPHIC PHOTOMETRIC REDSHIFT ERRORS ON WEAK LENSING TOMOGRAPHY  

SciTech Connect (OSTI)

We use a mock catalog of galaxies based on the COSMOS galaxy catalog, including information on photometric redshift (photo-z) and spectral energy distribution types of galaxies, in order to study how to define a galaxy subsample suitable for weak lensing tomography feasible with optical (and near-IR) multi-band data. Since most useful cosmological information arises from the sample variance limited regime for upcoming lensing surveys, a suitable subsample can be obtained by discarding a large fraction of galaxies that have less reliable photo-z estimations. We develop a method to efficiently identify photo-z outliers by monitoring the width of the posterior likelihood function of redshift estimation for each galaxy. This clipping method may allow us to obtain clean tomographic redshift bins (here three bins are considered) that have almost no overlap, by discarding more than {approx}70% of galaxies with ill-defined photo-zs corresponding to the number densities of remaining galaxies less than {approx}20 arcmin{sup -2} for a Subaru-type deep survey. Restricting the ranges of magnitudes and redshifts and/or adding near-IR data help us obtain a cleaner redshift binning. Using the Fisher information matrix formalism, we propagate photo-z errors into biases in the dark energy equation of state parameter w. We find that, by discarding most of the ill-defined photo-z galaxies, the bias in w can be reduced to a level comparable to the marginalized statistical error; however, the residual small systematic bias remains due to asymmetric scatters around the relation between photometric and true redshifts. We also use the mock catalog to estimate the cumulative signal-to-noise ratios (S/Ns) for measuring the angular cross-correlations of galaxies between finer photo-z bins, finding higher S/N values for the bins that include photo-z outliers.

Nishizawa, Atsushi J. [Astronomical Institute, Tohoku University, Aramaki Aobaku, Sendai 980-8578 (Japan); Takada, Masahiro [Institute for the Physics and Mathematics of the Universe (IPMU), University of Tokyo, 5-1-5 Kashiwa-no-Ha, Kashiwa City, Chiba 277-8582 (Japan); Hamana, Takashi; Furusawa, Hisanori, E-mail: nishizawa@astr.tohoku.ac.j [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka City, Tokyo 181-8588 (Japan)

2010-08-01T23:59:59.000Z

207

Observing trajectories with weak measurements in quantum systems in the semiclassical regime  

E-Print Network [OSTI]

We propose a scheme allowing to observe the evolution of a quantum system in the semiclassical regime along the paths generated by the propagator. The scheme relies on performing consecutive weak measurements of the position. We show how weak trajectories" can be extracted from the pointers of a series of measurement devices having weakly interacted with the system. The properties of these "weak trajectories" are investigated and illustrated in the case of a time-dependent model system.

A. Matzkin

2012-09-11T23:59:59.000Z

208

Tsung-Dao Lee, Weak Interactions, and Nonconservation of Parity  

Office of Scientific and Technical Information (OSTI)

Tsung-Dao Lee, Weak Interactions, and Nonconservation of Parity Tsung-Dao Lee, Weak Interactions, and Nonconservation of Parity Resources with Additional Information Tsung-Dao Lee Courtesy of Brookhaven National Laboratory T. D. Lee "has devoted his long career to the study of the theoretical aspects of particle and nuclear physics. In 1957, Lee and Chen Ning Yang won the Nobel Prize in physics for disproving a tenet of physics known as the conservation of parity. Their finding was based on research carried out at Brookhaven's particle accelerator, the Cosmotron, while they were visiting scientists at the Laboratory in 1956. In 1997, forty years after receiving the Nobel Prize, Lee returned to Brookhaven Lab as Director of the RIKEN BNL Research Center. Japan's Institute of Physical and Chemical Research (RIKEN) and Brookhaven formed the collaboration to work on basic questions in physics. In addition to developing physics theory, the collaboration studies data produced by Brookhaven's newest accelerator, the Relativistic Heavy Ion Collider, to understand the properties of quark-gluon plasma, a state of matter that scientists theorize existed near the beginning of the Universe.

209

A New Shear Estimator for Weak Lensing Observations  

E-Print Network [OSTI]

We present a new shear estimator for weak lensing observations which properly accounts for the effects of a realistic point spread function (PSF). Images of faint galaxies are subject to gravitational shearing followed by smearing with the instrumental and/or atmospheric PSF. We construct a `finite resolution shear operator' which when applied to an observed image has the same effect as a gravitational shear applied prior to smearing. This operator allows one to calibrate essentially any shear estimator. We then specialize to the case of weighted second moment shear estimators. We compute the shear polarizability which gives the response of an individual galaxy's polarization to a gravitational shear. We then compute the response of the population of galaxies, and thereby construct an optimal weighting scheme for combining shear estimates from galaxies of various shapes, luminosities and sizes. We define a figure of merit --- an inverse shear variance per unit solid angle --- which characterizes the quality of image data for shear measurement. The new method is tested with simulated image data. We discuss the correction for anisotropy of the PSF and propose a new technique involving measuring shapes from images which have been convolved with a re-circularizing PSF. We draw attention to a hitherto ignored noise related bias and show how this can be analyzed and corrected for. The analysis here draws heavily on the properties of real PSF's and we include as an appendix a brief review, highlighting those aspects which are relevant for weak lensing.

Nick Kaiser

1999-04-01T23:59:59.000Z

210

Nonequilibrium statistical mechanics of weakly stochastically perturbed system of oscillators  

E-Print Network [OSTI]

We consider a finite region of a $d$-dimensional lattice, $d\\in\\mathbb{N}$, of weakly coupled harmonic oscillators. The coupling is provided by a nearest-neighbour potential (harmonic or not) of size $\\varepsilon$. Each rotator weakly interacts by force of order $\\varepsilon$ with its own stochastic Langevin thermostat of arbitrary positive temperature. We investigate limiting as $\\varepsilon\\rightarrow 0$ behaviour of solutions of the system and of the local energy of oscillators on long-time intervals of order $\\varepsilon^{-1}$ and in a stationary regime. We show that it is governed by an effective equation which is a dissipative SDE with nondegenerate diffusion. Next we assume that the interaction potential is of size $\\varepsilon\\lambda$, where $\\lambda$ is another small parameter, independent from $\\varepsilon$. Solutions corresponding to this scaling describe small law temperature oscillations. We prove that in a stationary regime, under the limit $\\varepsilon\\rightarrow 0$, the main order in $\\lambda$ of the averaged Hamiltonian energy flow is proportional to the gradient of temperature. We show that the coefficient of proportionality, which we call the conductivity, admits a representation through stationary space-time correlations of the energy flow. Most of the results and convergences we obtain are uniform with respect to the number of oscillators in the system.

A. Dymov

2015-01-17T23:59:59.000Z

211

Weak coherence of groups and finite decomposition complexity.  

E-Print Network [OSTI]

The weak regular coherence (WRC) property of a finitely generated group $\\Gamma$ was introduced by G. Carlsson and this author to play the role of a weakening of Waldhausen's regular coherence as part of computation of the integral $K$-theoretic assembly map. This property is a coarse invariant of the word metric. It was shown that groups with finite asymptotic dimension (FAD) have this property. A new class of metric spaces (sFDC) was introduced recently by A. Dranishnikov and M. Zarichnyi. This class includes most notably the spaces with finite decomposition complexity (FDC) studied by E. Guentner, D. Ramras, R. Tessera, and G. Yu and so is larger than FAD. The main theorem of this paper shows that a group that belongs to sFDC is weakly regular coherent. As a consequence, groups $\\Gamma$ with sFDC have some remarkable algebraic and topological properties. One such property is vanishing of the Whitehead group $\\textit{Wh} (\\Gamma)$ for any group that has finite $K(\\Gamma,1)$ and FDC, which verifies a long-standing conjecture for this class of groups.

Boris Goldfarb

212

Proton-Proton Weak Capture in Chiral Effective Field Theory  

SciTech Connect (OSTI)

The astrophysical $S$-factor for proton-proton weak capture is calculated in chiral effective field theory over the center-of-mass relative-energy range 0--100 keV. The chiral two-nucleon potential derived up to next-to-next-to-next-to leading order is augmented by the full electromagnetic interaction including, beyond Coulomb, two-photon and vacuum-polarization corrections. The low-energy constants (LEC's) entering the weak current operators are fixed so as to reproduce the $A=3$ binding energies and magnetic moments, and the Gamow-Teller matrix element in tritium $\\beta$ decay. Contributions from $S$ and $P$ partial waves in the incoming two-proton channel are retained. The $S$-factor at zero energy is found to be $S(0)=(4.030 \\pm 0.006)\\times 10^{-23}$ MeV fm$^2$, with a $P$-wave contribution of $0.020\\times 10^{-23}$ MeV fm$^2$. The theoretical uncertainty is due to the fitting procedure of the LEC's and to the cutoff dependence. It is shown that polynomial fits to parametrize the energy dependence of the $S$-factor are inherently unstable.

Marcucci, Laura Elisa [Pisa U., INFN-Pisa; Schiavilla, Rocco [Old Dominion U., JLAB; Viviani, MIchele [INFN-Pisa

2013-05-01T23:59:59.000Z

213

Sensory hyperacuity in the jamming avoidance response of weakly electric fish  

E-Print Network [OSTI]

and the African weakly electric fish Cymnanhus perform electrolocation by generating constant wave-type electric473 Sensory hyperacuity in the jamming avoidance response of weakly electric fish Masashi Kawasaki Sensory systems often show remarkable sensitivities to small stimulus parameters. Weakly electric

Kawasaki, Masashi

214

Remaining Sites Verification Package for the 1607-B1 Septic System, Waste Site Reclassification Form 2007-015  

SciTech Connect (OSTI)

The 1607-B1 Septic System includes a septic tank, drain field, and associated connecting pipelines and influent sanitary sewer lines. This septic system serviced the former 1701-B Badgehouse, 1720-B Patrol Building/Change Room, and the 1709-B Fire Headquarters. The 1607-B1 waste site received unknown amounts of nonhazardous, nonradioactive sanitary sewage from these facilities during its operational history from 1944 to approximately 1970. In accordance with this evaluation, the confirmatory sampling results support a reclassification of this site to No Action. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. The results of confirmatory sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-08-30T23:59:59.000Z

215

Remaining Sites Verification Package for the 100-B-14:1 Process Sewer, Waste Site Reclassification Form 2004-005  

SciTech Connect (OSTI)

The 100-B-14:1 subsite encompasses the former process sewer main associated with the 105-B Reactor Building, 108-B Chemical Pumphouse and Tritium Separation Facility, 184-B Boiler House and the 100-B water treatment facilities, as well as the feeder lines associated with the 108-B facility, formerly discharging to the 116-B-7 Outfall Structure. The subsite has been remediated to achieve the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling demonstrated that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also showed that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-02-22T23:59:59.000Z

216

PROTOSTELLAR DISK FORMATION ENABLED BY WEAK, MISALIGNED MAGNETIC FIELDS  

SciTech Connect (OSTI)

The gas from which stars form is magnetized, and strong magnetic fields can efficiently transport angular momentum. Most theoretical models of this phenomenon find that it should prevent formation of large (>100 AU), rotationally supported disks around most protostars, even when non-ideal magnetohydrodynamic (MHD) effects that allow the field and gas to decouple are taken into account. Using recent observations of magnetic field strengths and orientations in protostellar cores, we show that this conclusion is incorrect. The distribution of magnetic field strengths is very broad, and alignments between fields and angular momentum vectors within protostellar cores are essentially random. By combining the field strength and misalignment data with MHD simulations showing that disk formation is expected for both weak and misaligned fields, we show that these observations imply that we should expect disk fractions of {approx}10%-50% even when protostars are still deeply embedded in their parent cores, and even if the gas is governed by ideal MHD.

Krumholz, Mark R. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Crutcher, Richard M. [Department of Astronomy, University of Illinois at Urbana-Champaign, 1002 W Green Street, Urbana, IL 61801 (United States); Hull, Charles L. H., E-mail: mkrumhol@ucsc.edu [Astronomy Department and Radio Astronomy Laboratory, University of California, Berkeley, CA 94720-3411 (United States)

2013-04-10T23:59:59.000Z

217

Analytical Kerr black hole lensing in the weak deflection limit  

Science Journals Connector (OSTI)

We present an analytical treatment of gravitational lensing by a Kerr black hole in the weak deflection limit. Lightlike geodesics are expanded as a Taylor series up to and including third-order terms in m/b and a/b, where m is the black hole mass, a the angular momentum, and b the impact parameter of the light ray. Positions and magnifications of individual images are computed with a perturbative analysis. At this order, the degeneracy with the translated Schwarzschild lens is broken. The critical curve is still a circle displaced from the black hole position in the equatorial direction and the corresponding caustic is pointlike. The degeneracy between the black hole spin and its inclination relative to the observer is broken through the angular coordinates of the perturbed images.

Mauro Sereno and Fabiana De Luca

2006-12-21T23:59:59.000Z

218

A New Shear Estimator for Weak Lensing Observations  

E-Print Network [OSTI]

We present a new shear estimator for weak lensing observations which properly accounts for the effects of a realistic point spread function (PSF). Images of faint galaxies are subject to gravitational shearing followed by smearing with the instrumental and/or atmospheric PSF. We construct a `finite resolution shear operator' which when applied to an observed image has the same effect as a gravitational shear applied prior to smearing. This operator allows one to calibrate essentially any shear estimator. We then specialize to the case of weighted second moment shear estimators. We compute the shear polarizability which gives the response of an individual galaxy's polarization to a gravitational shear. We then compute the response of the population of galaxies, and thereby construct an optimal weighting scheme for combining shear estimates from galaxies of various shapes, luminosities and sizes. We define a figure of merit --- an inverse shear variance per unit solid angle --- which characterizes the quality o...

Kaiser, N

1999-01-01T23:59:59.000Z

219

Weak-strong clustering transition in renewing compressible flows  

E-Print Network [OSTI]

We investigate the statistical properties of Lagrangian tracers transported by a time-correlated compressible renewing flow. We show that the preferential sampling of the phase space performed by tracers yields significant differences between the Lagrangian statistics and its Eulerian counterpart. In particular, the effective compressibility experienced by tracers has a non-trivial dependence on the time correlation of the flow. We examine the consequence of this phenomenon on the clustering of tracers, focusing on the transition from the weak- to the strong-clustering regime. We find that the critical compressibility at which the transition occurs is minimum when the time correlation of the flow is of the order of the typical eddy turnover time. Further, we demonstrate that the clustering properties in time-correlated compressible flows are non-universal and are strongly influenced by the spatio-temporal structure of the velocity field.

Ajinkya Dhanagare; Stefano Musacchio; Dario Vincenzi

2014-11-01T23:59:59.000Z

220

Aerodynamic Effects in Weakly Ionized Gas: Phenomenology and Applications  

SciTech Connect (OSTI)

Aerodynamic effects in ionized gases, often neglected phenomena, have been subject of a renewed interest in recent years. After a brief historical account, we discuss a selected number of effects and unresolved problems that appear to be relevant in both aeronautic and propulsion applications in subsonic, supersonic, and hypersonic flow. Interaction between acoustic shock waves and weakly ionized gas is manifested either as plasma-induced shock wave dispersion and acceleration or as shock-wave induced double electric layer in the plasma, followed by the localized increase of the average electron energy and density, as well as enhancement of optical emission. We describe the phenomenology of these effects and discuss several experiments that still do not have an adequate interpretation. Critical for application of aerodynamic effects is the energy deposition into the flow. We classify and discuss some proposed wall-free generation schemes with respect to the efficiency of energy deposition and overall generation of the aerodynamic body force.

Popovic, S.; Vuskovic, L. [Department of Physics, Old Dominion University, Norfolk, Virginia (United States)

2006-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Extraction of a Weak Phase from $B \\to D^{(*)} \\pi$  

E-Print Network [OSTI]

To observe CP-violating asymmetries through the interference of a weaker amplitude with a stronger one in $\\bo \\to D^{(*)} \\pi$ and $\\ob \\to D^{(*)} \\pi$ decays, one must collect enough events that the intensity associated with the weaker amplitude would be statistically significant. We show that provided the weaker amplitude is measured separately in $B^\\pm \\to D^{(*)\\pm} \\pi^0$ decays, the time-integrated approach requires around $2.5 \\cdot 10^8 \\ B \\bar B$ pairs for measurements of the weak phase $\\sin(2\\beta + \\gamma)$ with an uncertainty of $0.05$ or better. We also determine the optimal conditions for precise $2\\beta + \\gamma$ measurements and discuss the possibilities for resolving a discrete ambiguity.

Suprun, D A; Rosner, Jonathan L; Suprun, Denis; Chiang, Cheng-Wei; Rosner, Jonathan L.

2002-01-01T23:59:59.000Z

222

Extraction of a Weak Phase from $B \\to D^{(*)} ?$  

E-Print Network [OSTI]

To observe CP-violating asymmetries through the interference of a weaker amplitude with a stronger one in $\\bo \\to D^{(*)} \\pi$ and $\\ob \\to D^{(*)} \\pi$ decays, one must collect enough events that the intensity associated with the weaker amplitude would be statistically significant. We show that provided the weaker amplitude is measured separately in $B^\\pm \\to D^{(*)\\pm} \\pi^0$ decays, the time-integrated approach requires around $2.5 \\cdot 10^8 \\ B \\bar B$ pairs for measurements of the weak phase $\\sin(2\\beta + \\gamma)$ with an uncertainty of $0.05$ or better. We also determine the optimal conditions for precise $2\\beta + \\gamma$ measurements and discuss the possibilities for resolving a discrete ambiguity.

Denis Suprun; Cheng-Wei Chiang; Jonathan L. Rosner

2001-10-11T23:59:59.000Z

223

Strong and Weak Lensing United III: Measuring the Mass Distribution of the Merging Galaxy Cluster 1E0657-56  

SciTech Connect (OSTI)

The galaxy cluster 1E0657-56 (z = 0.296) is remarkably well-suited for addressing outstanding issues in both galaxy evolution and fundamental physics. We present a reconstruction of the mass distribution from both strong and weak gravitational lensing data. Multi-color, high-resolution HST ACS images allow detection of many more arc candidates than were previously known, especially around the subcluster. Using the known redshift of one of the multiply imaged systems, we determine the remaining source redshifts using the predictive power of the strong lens model. Combining this information with shape measurements of ''weakly'' lensed sources, we derive a high-resolution, absolutely-calibrated mass map, using no assumptions regarding the physical properties of the underlying cluster potential. This map provides the best available quantification of the total mass of the central part of the cluster. We also confirm the result from Clowe et al. (2004, 2006a) that the total mass does not trace the baryonic mass.

Bradac, Marusa; Clowe, Douglas; Gonzalez, Anthony H.; Marshall, Phil; Forman, William; Jones, Christine; Markevitch, Maxim; Randall, Scott; Schrabback, Tim; Zaritsky,; /KIPAC, Menlo Park /Bonn, Inst. Astrophys. /Arizona U., Astron. Dept. - Steward Observ. /Florida U. /Harvard-Smithsonian Ctr. Astrophys.

2006-09-27T23:59:59.000Z

224

Weak reactions with light nuclei - 6He beta-decay as a test case for the nuclear weak current  

E-Print Network [OSTI]

We present a microscopic calculation of the 6He beta-decay into the ground state of 6Li. To this end we use the impulse approximation to describe the nuclear weak current. The ground state wave functions are obtained from the solution of the nuclear 6-body problem. The nucleonnucleon interaction is described via the J-matrix inverse scattering potential (JISP), and the nuclear problem is solved using the hyperspherical-harmonics approach. This approach results in numerical accuracy of about 2 per mil in the transition matrix element. Bearing in mind that the contribution of meson-exchange currents to the transition matrix element is about 5%, these results pave the way for accurate estimation of their effect.

Doron Gazit; Sergey Vaintraub; Nir Barnea

2009-01-18T23:59:59.000Z

225

Three-dimensional theory of weakly nonlinear Compton scattering  

SciTech Connect (OSTI)

Nonlinear effects are known to occur in light sources when the wiggler parameter, or normalized 4-potential, A=e{radical}(-A{sub {mu}}A{sup {mu}})/m{sub 0}c, approaches unity. In this paper, it is shown that nonlinear spectral features can appear at arbitrarily low values of A if the fractional bandwidth of the undulator, {Delta}{phi}{sup -1}, is sufficiently small and satisfies the condition A{sup 2{Delta}{phi}{approx}}1. Consequences for the spectral brightness of Compton scattering light sources are outlined. Compton and Thomson scattering theories are compared with the Klein-Nishina cross-section formula to highlight differences in the case of narrow band gamma-ray operation. A weakly nonlinear Compton scattering theory is developed in one (plane wave) and three (local plane wave approximation) dimensions. Analytical models are presented and benchmarked against numerical calculations solving the Lorentz force equation with a fourth-order Runge-Kutta algorithm. Finally, narrow band gamma-ray spectra are calculated for realistic laser and electron beams.

Albert, F.; Anderson, S. G.; Gibson, D. J.; Marsh, R. A.; Siders, C. W.; Barty, C. P. J.; Hartemann, F. V. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)

2011-01-15T23:59:59.000Z

226

Weighing the Cosmological Energy Contents with Weak Gravitational Lensing  

E-Print Network [OSTI]

Bernardeau et al. (1997), using perturbation theory, showed that the skewness of the large-scale lensing-convergence, or projected mass density, could be used to constrain $\\Omega_m$, the matter content of the universe. On the other hand, deep weak-lensing field surveys in the near future will likely measure the convergence on small angular scales (energy contents, through their influence on the global geometrical distances and fluctuation growth rate. Moreover, nonlinear clustering appears to enhance the differences between predictions of the convergence skewness for a range of models. Hence, in addition to constraining $\\Omega_m$, the small-scale convergence skewness from future deep several- degree-wide surveys can be used to differentiate between curvature dominated and cosmological constant ($\\Lambda$) dominated models, as well as to constrain the equation of state of a quintessence component, thereby distinguishing $\\Lambda$ from quintessence as well. Finally, our method can be easily generalized to other measures such as aperture mass statistics.

Lam Hui

1999-02-19T23:59:59.000Z

227

Remaining useful life estimates of a PEM fuel cell stack by including characterization-induced disturbances in a particle filter model  

E-Print Network [OSTI]

Remaining useful life estimates of a PEM fuel cell stack by including characterization- induced Besançon, France rgourive@ens2m.fr ABSTRACT: Proton Exchange Membrane Fuel Cells (PEMFC) are available, Prognostics, Remaining Useful life, Particle filter 1. Introduction Proton Exchange Membrane Fuel Cells

Paris-Sud XI, Université de

228

Atmospheric Pressure Weakly Ionized Plasma Reactor Based on the Corona Discharge .  

E-Print Network [OSTI]

??Atmospheric pressure weakly ionized plasma (APWIP) is being used to treat or process goods and materials because it only activates the surface without modification of… (more)

[No author

2012-01-01T23:59:59.000Z

229

Testosterone modulates female chirping behavior in the weakly electric fish, Apteronotus leptorhynchus  

Science Journals Connector (OSTI)

The weakly electric fish, Apteronotus leptorhynchus..., produces a wave-like electric organ discharge (EOD) utilized for electrolocation and communication. Both ... by emitting “chirps”: transient increases in EOD

J. G. Dulka; L. Maler

1994-03-01T23:59:59.000Z

231

A Hybrid Strong/Weak Coupling Approach to Jet Quenching  

E-Print Network [OSTI]

We propose and explore a new hybrid approach to jet quenching in a strongly coupled medium. The basis of this phenomenological approach is to treat physics processes at different energy scales differently. The high-$Q^2$ processes associated with the QCD evolution of the jet from production as a single hard parton through its fragmentation, up to but not including hadronization, are treated perturbatively. The interactions between the partons in the shower and the deconfined matter within which they find themselves lead to energy loss. The momentum scales associated with the medium (of the order of the temperature) and with typical interactions between partons in the shower and the medium are sufficiently soft that strongly coupled physics plays an important role in energy loss. We model these interactions using qualitative insights from holographic calculations of the energy loss of energetic light quarks and gluons in a strongly coupled plasma, obtained via gauge/gravity duality. We embed this hybrid model into a hydrodynamic description of the spacetime evolution of the hot QCD matter produced in heavy ion collisions and confront its predictions with jet data from the LHC. The holographic expression for the energy loss of a light quark or gluon that we incorporate in our hybrid model is parametrized by a stopping distance. We find very good agreement with all the data as long as we choose a stopping distance that is comparable to but somewhat longer than that in ${\\cal N}=4$ supersymmetric Yang-Mills theory. For comparison, we also construct alternative models in which energy loss occurs as it would if the plasma were weakly coupled. We close with suggestions of observables that could provide more incisive evidence for, or against, the importance of strongly coupled physics in jet quenching.

Jorge Casalderrey-Solana; Doga Can Gulhan; José Guilherme Milhano; Daniel Pablos; Krishna Rajagopal

2014-06-26T23:59:59.000Z

232

BUOYANCY INSTABILITIES IN A WEAKLY COLLISIONAL INTRACLUSTER MEDIUM  

SciTech Connect (OSTI)

The intracluster medium (ICM) of galaxy clusters is a weakly collisional plasma in which the transport of heat and momentum occurs primarily along magnetic-field lines. Anisotropic heat conduction allows convective instabilities to be driven by temperature gradients of either sign: the magnetothermal instability (MTI) in the outskirts of clusters and the heat-flux buoyancy-driven instability (HBI) in their cooling cores. We employ the Athena magnetohydrodynamic code to investigate the nonlinear evolution of these instabilities, self-consistently including the effects of anisotropic viscosity (i.e., Braginskii pressure anisotropy), anisotropic conduction, and radiative cooling. We find that, in all but the innermost regions of cool-core clusters, anisotropic viscosity significantly impairs the ability of the HBI to reorient magnetic-field lines orthogonal to the temperature gradient. Thus, while radio-mode feedback appears necessary in the central few Multiplication-Sign 10 kpc, heat conduction may be capable of offsetting radiative losses throughout most of a cool core over a significant fraction of the Hubble time. Magnetically aligned cold filaments are then able to form by local thermal instability. Viscous dissipation during cold filament formation produces accompanying hot filaments, which can be searched for in deep Chandra observations of cool-core clusters. In the case of MTI, anisotropic viscosity leads to a nonlinear state with a folded magnetic field structure in which field-line curvature and field strength are anti-correlated. These results demonstrate that, if the HBI and MTI are relevant for shaping the properties of the ICM, one must self-consistently include anisotropic viscosity in order to obtain even qualitatively correct results.

Kunz, Matthew W.; Stone, James M. [Department of Astrophysical Sciences, Princeton University, Peyton Hall, 4 Ivy Lane, Princeton, NJ 08544 (United States); Bogdanovic, Tamara; Reynolds, Christopher S., E-mail: kunz@astro.princeton.edu, E-mail: jstone@astro.princeton.edu, E-mail: tamarab@astro.umd.edu, E-mail: chris@astro.umd.edu [Department of Astronomy, University of Maryland, College Park, MD 20742 (United States)

2012-08-01T23:59:59.000Z

233

A weakly nonlocal anisotropic fluid model for inhomogeneous Stokesian suspensions  

Science Journals Connector (OSTI)

A continuum model is proposed for a weakly inhomogeneous Stokesian suspensions as an extension with minor amendments of a previous work on homogeneous suspensions [J. D. Goddard J. Fluid Mech.568 1 (2006)]. In the present model stress and particle flux are given as invariant tensor functions of particle volume fraction ? deformation rate E and second-rank anisotropytensor A in a form that is also linear in E and the gradients of ? E and A . In contrast to models without history dependence all nonlinear dependence of particle flux on E arises from the evolution of A . Detailed attention is paid to unsteady viscometric flow where a contribution of streamline curvature to particle migration emerges as a natural consequence of tensorial gradients. The model predicts equal curvature-induced fluxes in gradient and vorticity directions but there is an unexplained disagreement with recent experiments on Couette and torsional flows. A previously proposed corotational evolution equation for A with a two-mode exponential relaxation is employed to investigate the transient response following the reversal of shearing in sinusoidal and in steady shear. The model predicts roughly equal response for the two flows if sinusoidal strains are of order unity which is consistent with some but not all experiments. The model for particle flux admits an asymmetric diffusiontensor which owing to Stokesian reversibility can become nonpositive upon abrupt reversal of shearing. This effect is diminished by non-Stokesian response on short strain scales which although poorly understood appears essential to elementary models without dependence on shear history. A synthesis is given of multipolar Stokesian resistance and the associated Stokesian dynamics showing how these follow from a single grand resistance kernel. In addition to unifying and extending large literature on Stokesian resistance formulae this provides some justification for the proposed continuum model and possible multipolar extensions.

J. D. Goddard

2008-01-01T23:59:59.000Z

234

ON THE ACCURACY OF WEAK-LENSING CLUSTER MASS RECONSTRUCTIONS  

SciTech Connect (OSTI)

We study the bias and scatter in mass measurements of galaxy clusters resulting from fitting a spherically symmetric Navarro, Frenk, and White model to the reduced tangential shear profile measured in weak-lensing (WL) observations. The reduced shear profiles are generated for {approx}10{sup 4} cluster-sized halos formed in a {Lambda}CDM cosmological N-body simulation of a 1 h{sup -1} Gpc box. In agreement with previous studies, we find that the scatter in the WL masses derived using this fitting method has irreducible contributions from the triaxial shapes of cluster-sized halos and uncorrelated large-scale matter projections along the line of sight. Additionally, we find that correlated large-scale structure within several virial radii of clusters contributes a smaller, but nevertheless significant, amount to the scatter. The intrinsic scatter due to these physical sources is {approx}20% for massive clusters and can be as high as {approx}30% for group-sized systems. For current, ground-based observations, however, the total scatter should be dominated by shape noise from the background galaxies used to measure the shear. Importantly, we find that WL mass measurements can have a small, {approx}5%-10%, but non-negligible amount of bias. Given that WL measurements of cluster masses are a powerful way to calibrate cluster mass-observable relations for precision cosmological constraints, we strongly emphasize that a robust calibration of the bias requires detailed simulations that include more observational effects than we consider here. Such a calibration exercise needs to be carried out for each specific WL mass estimation method, as the details of the method determine in part the expected scatter and bias. We present an iterative method for estimating mass M{sub 500c} that can eliminate the bias for analyses of ground-based data.

Becker, Matthew R. [Department of Physics, 5720 S. Ellis Avenue, University of Chicago, Chicago, IL 60637 (United States); Kravtsov, Andrey V. [Kavli Institute for Cosmological Physics, 5640 South Ellis Avenue, University of Chicago, Chicago, IL 60637 (United States)

2011-10-10T23:59:59.000Z

235

Validity of the Weakly Nonlinear Solution of the Cauchy Problem for the Boussinesq-Type Equation  

E-Print Network [OSTI]

Validity of the Weakly Nonlinear Solution of the Cauchy Problem for the Boussinesq-Type Equation for the regularized Boussinesq-type equation in the class of periodic functions. Validity of the weakly nonlinear in the formal asymptotic theory. Wayne and Wright [7] extended this analysis to the regularized Boussinesq

Pelinovsky, Dmitry

236

Born integral, stationary phase and linearized reflection coefficients in weak anisotropic media  

Science Journals Connector (OSTI)

......and a weak but arbitrarily anisotropic medium underlying an isotropic...in determining the weakly anisotropic parameters through an analysis...fluids, thin layers of shale, etc. often cause an otherwise...seismic wave propagation through anisotropic media. The most common anisotropic......

Ranjit K. Shaw; Mrinal K. Sen

2004-07-01T23:59:59.000Z

237

Magnetic reconnection in weakly collisional highly magnetized electron-ion plasmas  

E-Print Network [OSTI]

Magnetic reconnection in weakly collisional highly magnetized electron-ion plasmas Richard three-field model of two-dimensional magnetic reconnection in a weakly collisional, highly magnetized.1063/1.3374427 I. INTRODUCTION Magnetic reconnection is a fundamental physical phe- nomenon which occurs

Fitzpatrick, Richard

238

INTRODUCTION The electric sense of mormyrid weakly electric fish is generally  

E-Print Network [OSTI]

921 INTRODUCTION The electric sense of mormyrid weakly electric fish is generally regarded to be the dominant sense for orientation and communication in these animals. Weakly electric fish explore their environment by the aid of active electrolocation. They generate electric fields and analyze the distortions

Grant, Kirsty

239

Per-Unit Royalty vs Fixed Fee: The Case of Weak Patents  

E-Print Network [OSTI]

Per-Unit Royalty vs Fixed Fee: The Case of Weak Patents Rabah Amiry David Encaouaz Yassine a per-unit royalty or a ...xed fee when her innovation is covered by a weak patent, i.e. a patent of competition is not speci...ed, we show that the patent holder prefers to use a per-unit royalty scheme

Paris-Sud XI, Université de

240

PHYSICAL REVIEW E 88, 052140 (2013) Transport in weak dynamic disorder: A unified theory  

E-Print Network [OSTI]

. Based on Wigner representation, we obtain the radiative transfer equation (a linear Boltzmann equationPHYSICAL REVIEW E 88, 052140 (2013) Transport in weak dynamic disorder: A unified theory Bin Min the transport. In this article, we study the transport behavior of a quantum particle in weak dynamic disorder

Li, Tiejun

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
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241

A free plate surface and weak oceanic crust produce single-sided subduction on Earth  

E-Print Network [OSTI]

A free plate surface and weak oceanic crust produce single-sided subduction on Earth F. Crameri,1 P features of terrestrial plates: (1) the presence of a free deformable upper surface and (2) the presence of weak hydrated crust atop subducting slabs. We show that assuming a free surface, rather than

Kaus, Boris

242

RESONANCE ABSORPTION OF AN ULTRASONIC WAVE IN A WEAKLY ASSOCIATED LIQUID A.V. Narasimham  

E-Print Network [OSTI]

RESONANCE ABSORPTION OF AN ULTRASONIC WAVE IN A WEAKLY ASSOCIATED LIQUID A.V. Narasimham department for absorption and dispersion of an ultrasonic wave in a weakly associated liquid, taking into account resonance absorption of the wave. The state of the liquid has been described by a distribution function. The effect

Boyer, Edmond

243

PREDICTING THE FRACTURE CHARACTER OF POTENTIAL WEAK LAYERS IN PENETROMETER James Floyer1,  

E-Print Network [OSTI]

PREDICTING THE FRACTURE CHARACTER OF POTENTIAL WEAK LAYERS IN PENETROMETER SIGNALS James Floyer1 has proved to be challenging. A scheme for predicting the fracture character of potential weak layers fracture character groups is performed, potential failure layers are correctly classified 80% of the time

Jamieson, Bruce

244

Extension of the weak-line approximation and application to correlated-k methods  

SciTech Connect (OSTI)

Global climate models require accurate and rapid computation of the radiative transfer through the atmosphere. Correlated-k methods are often used. One of the approximations used in correlated-k models is the weakline approximation. We introduce an approximation T/sub g/ which reduces to the weak-line limit when optical depths are small, and captures the deviation from the weak-line limit as the extinction deviates from the weak-line limit. This approximation is constructed to match the first two moments of the gamma distribution to the k-distribution of the transmission. We compare the errors of the weak-line approximation with T/sub g/ in the context of a water vapor spectrum. The extension T/sub g/ is more accurate and converges more rapidly than the weak-line approximation.

Conley, A.J.; Collins, W.D.

2011-03-15T23:59:59.000Z

245

A Measurement of the Weak Charge of the Proton through Parity Violating Electron Scattering using the Q{sub weak} Apparatus  

SciTech Connect (OSTI)

After a decade of preparations, the Q{sub weak} experiment at Jefferson Lab is making the first direct measurement of the weak charge of the proton, Q{sub weak}. Because this quantity is suppressed in the Standard Model, a 4% result will significantly constrain new physics at the TeV scale while providing the most precise measurement of sin{sup 2}{theta}{sub W} at low energies. Operationally, we measure the small (about -0.220 ppm) parity violating asymmetry in electron-proton scattering in integrating mode while flipping the longitudinal polarization of the electrons up to 1000 times per second. Potential sources of new, parity violating interactions between electrons and light quarks include a Z', lepto-quarks, and parity violating SUSY interactions. The result presented here is based on the data taken during an initial two weeks period which included a 16.7% measurement of the parity violating electron-proton ({vec e}p) scattering asymmetry, A=-0.279{+-}0.035(stat.){+-}0.031(syst.) ppm at Q{sup 2}=0.0250{+-}0.0006(GeV){sup 2}. The weak charge of the proton is extracted by performing a global analysis on parity violating electron scattering (PVES) asymmetries on nuclear targets and it is Q{sub W}{sup p}=0.064{+-}0.012. Then effective vector couplings of the up/down quarks (C{sub 1u}/C{sub 1d}) and weak charge of the neutron are extracted by combining precise {sup 133}Cs atomic parity violating (APV) measurement and PVES measurements. The result is a proof of principle for the analysis of the full Q{sub weak} data to be completed in the near future.

Beminiwattha, Rakitha S. [SYRACUSE

2013-12-01T23:59:59.000Z

246

Room-temperature observations of the weak localization in low-mobility graphene films  

SciTech Connect (OSTI)

We report room-temperature observations of the quantum conductance corrections caused by the weak localization in graphene films synthesized using solid-state-source chemical vapor deposition. Both Raman spectroscopy and Hall measurements showed strong disorder in the samples with a low mobility of ?430 cm{sup 2}/V s. The emergence of weak localization at room temperature arises from the competition between the valley-dependent scattering and the thermal dephasing in such low-quality samples, although quantum effects normally appear in the samples that have an ideal structure at cryogenic temperatures. The large disorder in our low-mobility samples unexpectedly preserved the quantum mechanical weak localization.

Han, Junhao; Wang, Shanyue; Qian, Di; Song, Fengqi, E-mail: songfengqi@nju.edu.cn, E-mail: bgwang@nju.edu.cn; Wang, Baigeng, E-mail: songfengqi@nju.edu.cn, E-mail: bgwang@nju.edu.cn; Han, Min; Zhou, Jianfeng [National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093 (China); Wang, Xinran; Wang, Xuefeng [School of Electrical and Electronic Engineering, Nanjing University, Nanjing 210093 (China)

2013-12-07T23:59:59.000Z

247

Method and apparatus for evaluating structural weakness in polymer matrix composites  

DOE Patents [OSTI]

A method and apparatus for evaluating structural weaknesses in polymer matrix composites is described. An object to be studied is illuminated with laser radiation and fluorescence emanating therefrom is collected and filtered. The fluorescence is then imaged and the image is studied to determine fluorescence intensity over the surface of the object being studied and the wavelength of maximum fluorescent intensity. Such images provide a map of the structural integrity of the part being studied and weaknesses, particularly weaknesses created by exposure of the object to heat, are readily visible in the image.

Wachter, Eric A. (Oak Ridge, TN); Fisher, Walter G. (Knoxville, TN)

1996-01-01T23:59:59.000Z

248

Method and apparatus for evaluating structural weakness in polymer matrix composites  

DOE Patents [OSTI]

A method and apparatus for evaluating structural weaknesses in polymer matrix composites is described. An object to be studied is illuminated with laser radiation and fluorescence emanating therefrom is collected and filtered. The fluorescence is then imaged and the image is studied to determine fluorescence intensity over the surface of the object being studied and the wavelength of maximum fluorescent intensity. Such images provide a map of the structural integrity of the part being studied and weaknesses, particularly weaknesses created by exposure of the object to heat, are readily visible in the image. 6 figs.

Wachter, E.A.; Fisher, W.G.

1996-01-09T23:59:59.000Z

249

The Lyons Creek boat remains  

E-Print Network [OSTI]

and artifacts dating to the colonial era were discovered during a dredging operation at Lyons Creek, a tributary of the Patuxent River, Calvert County, Maryland. Also recovered from the spoil area were ceramics, wine bottles, and kaolin tobacco pipes, which... Lyons Creek A Shortage of Boats 17 Ferriage 33 Lightering Tobacco Small Craft on the Patuxent River 35 Shallops and Sloops 48 Flats 61 Other Colonial-Era Small Craft 64 III ARTIFACTS AND DATING 68 A Lack of Provenience 68 Cannonballs 69...

Neyland, Robert Stephen

1990-01-01T23:59:59.000Z

250

Hot spots remain the exception  

SciTech Connect (OSTI)

This article is a survey of the drilling activity and petroleum activity in Africa. The areas which seem to hold the highest promise for new discoveries or increased exports are Egypt's Western Desert which seems to offer the possibility of significant oil discoveries. In addition, Nigeria has dramatically increased its exploration activity which is counter to the global trend in 1986. Areas where activity is decreasing are Cameroon, South Africa. It is pointed out that the Gabon crude oil reserves may have been raised 60% by a single on-shore discovery.

Not Available

1987-08-01T23:59:59.000Z

251

Remaining Sites Verification Package for the 100-C-9:2 Sanitary Sewer Pipelines, Waste Site Reclassification Form 2004-013  

SciTech Connect (OSTI)

The 100-C-9:2 sanitary sewer pipelines include the feeder pipelines associated with the 1607-B8, the 1607-B9, the 1607-B10 and the 1607-B11 septic systems. Contaminated soil and piping from the feeder lines to the septic systems were removed and disposed of. The remaining soil in the excavations has been shown to meet the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-07-11T23:59:59.000Z

252

V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass  

Broader source: Energy.gov (indexed) [DOE]

4: EMC RSA Archer GRC Open Redirection Weakness and Security 4: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue September 4, 2013 - 6:00am Addthis PROBLEM: A weakness and a security issue have been reported in EMC RSA Archer GRC PLATFORM: EMC RSA Archer GRC 5.x ABSTRACT: This fixes multiple vulnerabilities, which can be exploited to bypass certain security restrictions and to conduct spoofing attacks REFERENCE LINKS: Secunia Advisory SA54717 SecurityTracker Alert ID 1028971 EMC Identifier: ESA-2013-057 CVE-2013-3276 CVE-2013-3277 IMPACT ASSESSMENT: Medium DISCUSSION: 1) The application does not properly restrict deactivated users. This can be exploited by deactivated users to login and gain access to otherwise

253

TYPES ARE WEAK #GROUPOIDS BENNO VAN DEN BERG AND RICHARD GARNER  

E-Print Network [OSTI]

TYPES ARE WEAK #­GROUPOIDS BENNO VAN DEN BERG AND RICHARD GARNER Abstract. We define a notion VAN DEN BERG AND RICHARD GARNER groupoid of a space---where we must identify paths up to homotopy

van den Berg, Benno

254

TYPES ARE WEAK -GROUPOIDS BENNO VAN DEN BERG AND RICHARD GARNER  

E-Print Network [OSTI]

TYPES ARE WEAK -GROUPOIDS BENNO VAN DEN BERG AND RICHARD GARNER Abstract. We define a notion Mathematics Subject Classification. Primary: 03B15, 18D05; Secondary: 18D50. 1 #12;2 BENNO VAN DEN BERG

van den Berg, Benno

255

PHYSICAL REVIEW E 85, 026211 (2012) Weakly subcritical stationary patterns: Eckhaus instability and homoclinic snaking  

E-Print Network [OSTI]

PHYSICAL REVIEW E 85, 026211 (2012) Weakly subcritical stationary patterns: Eckhaus instability from subcritical to supercritical stationary periodic patterns is described by the one of localized structures in systems exhibiting homoclinic snaking during the transition from subcriticality

Knobloch, Edgar

256

Dynamics of Weak, Bifurcated and Strong Hydrogen Bonds in Lithium Nitrate Trihydrate  

SciTech Connect (OSTI)

The properties of three distinct types of hydrogen bonds, namely a weak, a bifurcated and a strong one, all present in/the LiNO3 (HDO)(D2O)2 hydrate lattice unit cell are studied using steady-state and time-resolved spectroscopy. The lifetimes of the OH stretching vibrations for the three individual bonds are 2.2 ps (weak), 1.7 ps (bifurcated), and 1.2 ps (strong), respectively. For the first time the properties of bifurcated H bonds can thus be unambiguously directly compared to those of weak and strong H bonds in the same system. The values of their OH stretching vibration lifetime, anharmonicity, red shift and bond strength lie between those for the strong and weak H bonds. The experimentally observed inhomogeneous broadening of their spectral signature is attributed to the coupling with a low frequency intermolecular wagging vibration/

Werhahn, Jasper C.; Pandelov, S.; Xantheas, Sotiris S.; Iglev, H.

2011-07-07T23:59:59.000Z

257

Cosmology with the cluster mass function: mass estimators and shape systematics in large weak lensing surveys  

Science Journals Connector (OSTI)

......density, and the nature and evolution of dark energy. Large weak lensing surveys of 20 000 galaxy clusters and groups will...Joint Dark Energy Mission, Large Synoptic Survey Teloscope and Dark Energy Survey unhindered by galaxy cluster and group......

Virginia L. Corless; Lindsay J. King

2009-06-11T23:59:59.000Z

258

Generic Approach for Dispersing Single-Walled Carbon Nanotubes:? The Strength of a Weak Interaction  

Science Journals Connector (OSTI)

A generic noncovalent approach for dispersing high concentrations of individual single-walled carbon nanotubes (SWNT) in organic as well as aqueous solutions of synthetic block copolymers is presented. It is suggested that a weak, long-ranged entropic ...

Rina Shvartzman-Cohen; Yael Levi-Kalisman; Einat Nativ-Roth; Rachel Yerushalmi-Rozen

2004-06-24T23:59:59.000Z

259

Theory and Modeling of Weakly Bound/Physisorbed Materials for Hydrogen Storage  

Broader source: Energy.gov [DOE]

Presentation on the Theory and Modeling of Weakly Bound/Physisorbed Materials for Hydrogen Storage given at the DOE Theory Focus Session on Hydrogen Storage Materials on May 18, 2006.

260

Weak formulations and solution multiplicity of equilibrium configurations with Coulomb friction  

E-Print Network [OSTI]

Weak formulations and solution multiplicity of equilibrium configurations with Coulomb friction configurations of elastic struc- tures in contact with Coulomb friction. We obtain a variational formulation configurations with arbitrary small friction coefficients. We illustrate the result in two space dimensions

Bostan, Mihai

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

The Difficulty of the Heating of Cluster Cooling Flows by Sound Waves and Weak Shocks  

E-Print Network [OSTI]

We investigate heating of the cool core of a galaxy cluster through the dissipation of sound waves and weak shocks excited by the activities of the central active galactic nucleus (AGN). Using a weak shock theory, we show that this heating mechanism alone cannot reproduce observed temperature and density profiles of a cluster, because the dissipation length of the waves is much smaller than the size of the core and thus the wave energy is not distributed to the whole core.

Yutaka Fujita; Takeru Ken Suzuki

2006-10-19T23:59:59.000Z

262

Nuclear magnetic absorption line widths in weak magnetic fields with a Robinson oscillator  

E-Print Network [OSTI]

NUCLEAR MAGNETIC ABSORPTION LINE WIDTHS IN WEAK MAGNETIC FIELDS WITH A ROBINSON OSCILLATOR A Thesis by TIMOTHY LEE FLUGUM Subnntted to the Graduate College of Texas ARM University in partial fulfillment of the requirement for the degree... of MASTER OF SCIENCE August 19SI Major Subject: Physics NUCLEAR MAGNETIC ABSORPTION LINE WIDTHS IN WEAK MAGNETIC FIELDS WITH A ROBINSON OSCILLATOR A Thesis TIMOTHY LEE FLUGUM Approved as to style and content by: Nelson M. Duller (Chairman...

Flugum, Timothy Lee

1987-01-01T23:59:59.000Z

263

Weak charge form factor and radius of 208Pb through parity violation in electron scattering  

E-Print Network [OSTI]

We use distorted wave electron scattering calculations to extract the weak charge form factor F_W(q), the weak charge radius R_W, and the point neutron radius R_n, of 208Pb from the PREX parity violating asymmetry measurement. The form factor is the Fourier transform of the weak charge density at the average momentum transfer q=0.475 fm$^{-1}$. We find F_W(q) =0.204 \\pm 0.028 (exp) \\pm 0.001 (model). We use the Helm model to infer the weak radius from F_W(q). We find R_W= 5.826 \\pm 0.181 (exp) \\pm 0.027 (model) fm. Here the exp error includes PREX statistical and systematic errors, while the model error describes the uncertainty in R_W from uncertainties in the surface thickness \\sigma of the weak charge density. The weak radius is larger than the charge radius, implying a "weak charge skin" where the surface region is relatively enriched in weak charges compared to (electromagnetic) charges. We extract the point neutron radius R_n=5.751 \\pm 0.175 (exp) \\pm 0.026 (model) \\pm 0.005 (strange) fm$, from R_W. Here there is only a very small error (strange) from possible strange quark contributions. We find R_n to be slightly smaller than R_W because of the nucleon's size. Finally, we find a neutron skin thickness of R_n-R_p=0.302\\pm 0.175 (exp) \\pm 0.026 (model) \\pm 0.005 (strange) fm, where R_p is the point proton radius.

C. J. Horowitz; Z. Ahmed; C. -M. Jen; A. Rakhman; P. A. Souder; M. M. Dalton; N. Liyanage; K. D. Paschke; K. Saenboonruang; R. Silwal; G. B. Franklin; M. Friend; B. Quinn; K. S. Kumar; J. M. Mammei; D. McNulty; L. Mercado; S. Riordan; J. Wexler; R. W. Michaels; G. M. Urciuoli

2014-02-13T23:59:59.000Z

264

Analytic Expression of the Genus in Weakly Non-Gaussian Field Induced by Gravity  

E-Print Network [OSTI]

The gravitational evolution of the genus of the density field in large-scale structure is analytically studied in a weakly nonlinear regime using second-order perturbation theory. Weakly nonlinear evolution produces asymmetry in the symmetric genus curve for Gaussian initial density field. The effect of smoothing the density field in perturbation theory on the genus curve is also evaluated and gives the dependence of the asymmetry of the genus curve on spectra of initial fluctuations.

T. Matsubara

1994-05-16T23:59:59.000Z

265

As we enter 2014, it is no secret that retail merchants remain one of the favorite targets of organized cyber thieves focused on stealing  

E-Print Network [OSTI]

As we enter 2014, it is no secret that retail merchants remain one of the favorite targets organizations. For large retailers, the burden of complying with the PCI DSS is often daunting, if not nearly impossible, at times. The complex, distributed environments of large retailers present unique challenges

Fisher, Kathleen

266

DEWEK Wind Energy Conference 2012 Category: 4. Simulation models BACKWARD EXTRAPOLATION OF SHORT-TIME MEASUREMENT DATA FOR A REMAINING SERVICE LIFE ESTIMATION OF WIND  

E-Print Network [OSTI]

DEWEK Wind Energy Conference 2012 Category: 4. Simulation models 1 BACKWARD EXTRAPOLATION OF SHORT-TIME MEASUREMENT DATA FOR A REMAINING SERVICE LIFE ESTIMATION OF WIND TURBINES Dipl.-Ing. René Kamieth, Prof. Dr, Germany, Tel.: +49-(0)30-314-23603, Fax: +49-(0)30-314-26131 Summary Wind turbines built in the last

Berlin,Technische Universität

267

Quantized topological terms in weakly coupled gauge theories and their connection to symmetry protected topological phases  

E-Print Network [OSTI]

We consider a weakly coupled gauge theory where charged particles all have large gaps (ie no Higgs condensation to break the gauge "symmetry") and the field strength fluctuates only weakly. We ask what kind of topological terms can be added to the Lagrangian of such a weakly coupled gauge theory. In this paper, we systematically construct quantized topological terms which are generalization of the Chern-Simons terms and $F\\wedge F$ terms, in space-time dimensions $d$ and for any gauge groups (continuous or discrete), using each element of the topological cohomology classes $H^{d+1}(BG,\\Z)$ on the classifying space $BG$ of the gauge group $G$. In 3$d$ or for finite gauge groups above 3$d$, the weakly coupled gauge theories are gapped. So our results on topological terms can be viewed as a systematic construction of gapped topologically ordered phases of weakly coupled gauge theories. In other cases, the weakly coupled gauge theories are gapless. So our results can be viewed as an attempt to systematically cons...

Hung, Ling-Yan

2012-01-01T23:59:59.000Z

268

Weak greedy algorithms[*]This research was supported by National Science Foundation Grant DMS 9970326 and by ONR Grant N00014?96?1?1003.  

Science Journals Connector (OSTI)

Theoretical greedy type algorithms are studied: a Weak Greedy Algorithm, a Weak Orthogonal Greedy Algorithm, and a Weak Relaxed Greedy Algorithm. These algorithms are defined by weaker assumptions than their a...

V.N. Temlyakov

269

Remaining Sites Verification Package for the 118-C-3:3, 105-C French Drains, Waste Site Reclassification Form 2006-016  

SciTech Connect (OSTI)

The 118-C-3:3 french drains received condensate from the steam heating system in the 105-C Reactor Building. The 118-C-3:3 french drain meets the remedial action objectives specified in the Remaining Sites ROD. The results demonstrate that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

R. A. Carlson

2006-04-24T23:59:59.000Z

270

Q{sub weak} experiment update and applications/opportunities at lower energies  

SciTech Connect (OSTI)

The Q{sub weak} experiment has recently completed data-taking at Jefferson Lab. The primary focus of the experiment is to perform a precision measurement of the proton's neutral weak charge. The Standard Model gives a definite prediction for the weak charge. Any deviation from that can be interpreted as evidence for new physics beyond the Standard Model. This precision, low energy measurement is sensitive to new physics signatures at energy scales up to 2 TeV. The experiment measures the parity-violating asymmetry in the scattering of 1.165 GeV longitudinally polarized electrons on the proton at low momentum transfer (Q{sup 2} ? 0.025 (GeV/c){sup 2}). This paper provides a brief status report on the experiment with a focus on instrumentation and techniques that are applicable to lower beam energy realizations of parity-violating electron scattering measurements. Estimates of anticipated errors on the proton's weak charge expected if the Q{sub weak} apparatus were used at a lower beam energy are also discussed.

Pitt, Mark L. [Center for Neutrino Physics and Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States); Collaboration: Qweak Collaboration

2013-11-07T23:59:59.000Z

271

Biased Dark Energy Constraints from Neglecting Reduced Shear in Weak Lensing Surveys  

E-Print Network [OSTI]

The weak gravitational lensing of distant galaxies by large-scale structure is expected to become a powerful probe of dark energy. By measuring the ellipticities of large numbers of background galaxies, the subtle gravitational distortion called "cosmic shear" can be measured and used to constrain dark energy parameters. The observed galaxy ellipticities, however, are induced not by shear but by reduced shear, which also accounts for slight magnifications of the images. This distinction is negligible for present weak lensing surveys, but it will become more important as we improve our ability to measure and understand small-angle cosmic shear modes. I calculate the discrepancy between shear and reduced shear in the context of power spectra and cross spectra, finding the difference could be as high as 10% on the smallest accessible angular scales. I estimate how this difference will bias dark energy parameters obtained from two weak lensing methods: weak lensing tomography and the shear ratio method known as offset-linear scaling. For weak lensing tomography, ignoring the effects of reduced shear will cause future surveys considered by the Dark Energy Task Force to measure dark energy parameters that are biased by amounts comparable to their error bars. I advocate that reduced shear be properly accounted for in such surveys, and I provide a semi-analytic formula for doing so. Since reduced shear cross spectra do not follow an offset-linear scaling relation, the shear ratio method is similarly biased but with smaller significance.

Charles Shapiro

2008-12-03T23:59:59.000Z

272

Neutrino halos in clusters of galaxies and their weak lensing signature  

SciTech Connect (OSTI)

We study whether non-linear gravitational effects of relic neutrinos on the development of clustering and large-scale structure may be observable by weak gravitational lensing. We compute the density profile of relic massive neutrinos in a spherical model of a cluster of galaxies, for several neutrino mass schemes and cluster masses. Relic neutrinos add a small perturbation to the mass profile, making it more extended in the outer parts. In principle, this non-linear neutrino perturbation is detectable in an all-sky weak lensing survey such as EUCLID by averaging the shear profile of a large fraction of the visible massive clusters in the universe, or from its signature in the general weak lensing power spectrum or its cross-spectrum with galaxies. However, correctly modeling the distribution of mass in baryons and cold dark matter and suppressing any systematic errors to the accuracy required for detecting this neutrino perturbation is severely challenging.

Villaescusa-Navarro, Francisco; Peña-Garay, Carlos [IFIC, Universidad de Valencia-CSIC, E-46071, Valencia (Spain); Miralda-Escudé, Jordi [Institució Catalana de Recerca i Estudis Avançats, Passeig Lluís Companys, 23, 08010-Barcelona (Spain); Quilis, Vicent, E-mail: villa@ific.uv.es, E-mail: miralda@icc.ub.es, E-mail: penya@ific.uv.es, E-mail: vicent.quilis@uv.es [Departamento de Astronomia y Astrofísica, Universidad de Valencia, C/ Dr. Moliner, 50, E-46100, Burjassot, Valencia (Spain)

2011-06-01T23:59:59.000Z

273

Binary White Dwarf Mergers: Weak Evidence for Prompt Detonations in High-Resolution Adaptive Mesh Simulations.  

E-Print Network [OSTI]

?? The origins of thermonuclear supernovae remain poorly understood – a troubling fact, given their importance in astrophysics and cosmology. A leading theory posits that these… (more)

Fenn, Daniel

2014-01-01T23:59:59.000Z

274

Weak localization of dilute 2D electrons in undoped GaAs heterostructures.  

SciTech Connect (OSTI)

The temperature dependence of the resistivity and magnetoresistance of dilute 2D electrons are reported. The temperature dependence of the resistivity can be qualitatively described through phonon and ionized impurity scattering. While the temperature dependence indicates no ln(T) increase in the resistance, a sharp negative magnetoresistance feature is observed at small magnetic fields. This is shown to arise from weak localization. At very low density, we believe weak localization is still present, but cannot separate it from other effects that cause magnetoresistance in the semi-classical regime.

Seamons, John Andrew; Lilly, Michael Patrick; Reno, John Louis; Bielejec, Edward Salvador

2004-07-01T23:59:59.000Z

275

Review of grid connection requirements for generation assets in weak power grids  

Science Journals Connector (OSTI)

Abstract The integration of variable energy sources in weak power grids poses many technical and economic challenges. Both aspects have an impact on the development of grid codes, that is worth analysing. Grid codes shall be adapted to technical constraints in the corresponding power grid, such as the network strength and the characteristics of generation technologies. This paper reviews and compares technical requirements imposed on to generation assets in countries with very distinct characteristics, in order to analyse the influence of weakness and isolation of a power grid on the interconnection conditions imposed by system operators to grid users. Current and future regulation aspects are covered.

Agurtzane Etxegarai; Pablo Eguia; Esther Torres; Araitz Iturregi; Victor Valverde

2015-01-01T23:59:59.000Z

276

GAO-11-520T Federal Real Property: Progress Made on Planning and Data, but Unneeded Owned and Leased Facilities Remain  

Broader source: Energy.gov (indexed) [DOE]

Economic Economic Development, Public Buildings and Emergency Management, Committee on Transportation and Infrastructure, House of Representatives FEDERAL REAL PROPERTY Progress Made on Planning and Data, but Unneeded Owned and Leased Facilities Remain Statement of David J. Wise, Director Physical Infrastructure Issues Brian J. Lepore, Director Defense Capabilities and Management Issues For Release on Delivery Expected at 10:00 a.m. EDT Wednesday, April 6, 2011 GAO-11-520T Accountability * Integrity * Reliability Highlights of GAO-11-520T, a testimony before the Subcommittee on Economic Development, Public Buildings, and Emergency Management, Committee on Transportation and Infrastructure, House of Representatives. April 6, 2011 FEDERAL REAL PROPERTY

277

Remaining Sites Verification Package for the 100-F-31, 144-F Sanitary Sewer System, Waste Site Reclassification Form 2006-033  

SciTech Connect (OSTI)

The 100-F-31 waste site is a former septic system that supported the inhalation laboratories, also referred to as the 144-F Particle Exposure Laboratory (132-F-2 waste site), which housed animals exposed to particulate material. The 100-F-31 waste site has been remediated to achieve the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2006-08-24T23:59:59.000Z

278

Remaining Sites Verification Package for the 100-F-33, 146-F Aquatic Biology Fish Ponds, Waste Site Reclassification Form 2006-021  

SciTech Connect (OSTI)

The 100-F-33, 146-F Aquatice Biology Fish Ponds waste site was an area with six small rectangular ponds and one large circular pond used to conduct tests on fish using various mixtures of river and reactor effluent water. The current site conditions achieve the remedial action objectives specified in the Remaining Sites ROD. The results of verification and applicable confirmatory sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2006-08-25T23:59:59.000Z

279

Remaining Sites Verification Package for the 100-B-1 Surface Chemical and Solid Waste Dumping Area, Waste Site Reclassification Form 2006-003  

SciTech Connect (OSTI)

The 100-B-1 waste site was a dumping site that was divided into two areas. One area was used as a laydown area for construction materials, and the other area was used as a chemical dumping area. The 100-B-1 Surface Chemical and Solid Waste Dumping Area site meets the remedial action objectives specified in the Remaining Sites ROD. The results demonstrate that residual contaminant concentrations support future unrestricted land uses that can be represented by a rural-residential scenario. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

R. A. Carlson

2006-04-24T23:59:59.000Z

280

Weak interaction corrections to hadronic top quark pair production: contributions from quark-gluon and $b \\bar b$ induced reactions  

E-Print Network [OSTI]

As an addendum to our previous evaluation of the weak-interaction corrections to hadronic top-quark pair production we determine the leading weak-interaction contributions due to the subprocesses $b {\\bar b} \\to t {\\bar t}$ and $g q ({\\bar q}) \\to t {\\bar t} q ({\\bar q})$. For several distributions in $t {\\bar t}$ production at the LHC we find that these contributions are non-negligible as compared to the weak corrections from the other partonic subprocesses.

Werner Bernreuther; Michael Fuecker; Zong-Guo Si

2008-04-08T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

Plasma-wall transition in weakly coUisional G. Manfredi* and S. Devaux^  

E-Print Network [OSTI]

Plasma-wall transition in weakly coUisional plasmas G. Manfredi* and S. Devaux^ *Institut de Abstract. This paper reviews some theoretical and computational aspects of plasma-wall interac- tions model, and are subsequently tested with kinetic simulations. The various regions com- posing the plasma

Paris-Sud XI, Université de

282

Validity of the weakly-nonlinear solution of the Boussinesq-Ostrovsky equation  

E-Print Network [OSTI]

Validity of the weakly-nonlinear solution of the Boussinesq-Ostrovsky equation Dmitry Pelinovsky., in press (2013) D.P. and G. Schneider, Non. Diff. Eqs. Appl. 20, 1277 (2013) #12;Boussinesq-Ostrovsky equation We are concerned here in the regularized Boussinesq-Ostrovsky equation Utt - Uxx = 1 2 (U2 )xx

Pelinovsky, Dmitry

283

CBER-DETR Nevada Coincident and Leading Employment Weak National Recovery Lengthens Nevada's Employment Recession  

E-Print Network [OSTI]

Statistics. The Nevada Coincident Employment Index includes four employment measures ­ household employmentCBER-DETR Nevada Coincident and Leading Employment Indexes1 Weak National Recovery Lengthens Nevada's Employment Recession The Nevada Coincident Employment Index measures the ups and downs of the Nevada economy

Ahmad, Sajjad

284

Search for the weak decays $J/?\\to D^{(*)}_{s}e?_{e}$  

E-Print Network [OSTI]

Using a sample of $2.25\\times 10^8$ $J/\\psi$ events collected with the BESIII detector at the BEPCII collider, we search for the $J/\\psi$ semi-leptonic weak decay $J/\\psi \\to D^{-}_{s} e^{+}\

BESIII collaboration; M. Ablikim; M. N. Achasov; X. C. Ai; O. Albayrak; M. Albrecht; D. J. Ambrose; A. Amoroso; F. F. An; Q. An; J. Z. Bai; R. Baldini Ferroli; Y. Ban; D. W. Bennett; J. V. Bennett; M. Bertani; D. Bettoni; J. M. Bian; F. Bianchi; E. Boger; O. Bondarenko; I. Boyko; R. A. Briere; H. Cai; X. Cai; O. Cakir; A. Calcaterra; G. F. Cao; S. A. Cetin; J. F. Chang; G. Chelkov; G. Chen; H. S. Chen; H. Y. Chen; J. C. Chen; M. L. Chen; S. J. Chen; X. Chen; X. R. Chen; Y. B. Chen; H. P. Cheng; X. K. Chu; Y. P. Chu; G. Cibinetto; D. Cronin-Hennessy; H. L. Dai; J. P. Dai; D. Dedovich; Z. Y. Deng; A. Denig; I. Denysenko; M. Destefanis; F. De Mori; Y. Ding; C. Dong; J. Dong; L. Y. Dong; M. Y. Dong; S. X. Du; P. F. Duan; J. Z. Fan; J. Fang; S. S. Fang; X. Fang; Y. Fang; L. Fava; F. Feldbauer; G. Felici; C. Q. Feng; E. Fioravanti; C. D. Fu; Q. Gao; Y. Gao; I. Garzia; K. Goetzen; W. X. Gong; W. Gradl; M. Greco; M. H. Gu; Y. T. Gu; Y. H. Guan; A. Q. Guo; L. B. Guo; T. Guo; Y. Guo; Y. P. Guo; Z. Haddadi; A. Hafner; S. Han; Y. L. Han; F. A. Harris; K. L. He; Z. Y. He; T. Held; Y. K. Heng; Z. L. Hou; C. Hu; H. M. Hu; J. F. Hu; T. Hu; Y. Hu; G. M. Huang; G. S. Huang; H. P. Huang; J. S. Huang; X. T. Huang; Y. Huang; T. Hussain; Q. Ji; Q. P. Ji; X. B. Ji; X. L. Ji; L. L. Jiang; L. W. Jiang; X. S. Jiang; J. B. Jiao; Z. Jiao; D. P. Jin; S. Jin; T. Johansson; A. Julin; N. Kalantar-Nayestanaki; X. L. Kang; X. S. Kang; M. Kavatsyuk; B. C. Ke; R. Kliemt; B. Kloss; O. B. Kolcu; B. Kopf; M. Kornicer; W. Kuehn; A. Kupsc; W. Lai; J. S. Lange; M. Lara; P. Larin; C. H. Li; Cheng Li; D. M. Li; F. Li; G. Li; H. B. Li; J. C. Li; Jin Li; K. Li; K. Li; P. R. Li; T. Li; W. D. Li; W. G. Li; X. L. Li; X. M. Li; X. N. Li; X. Q. Li; Z. B. Li; H. Liang; Y. F. Liang; Y. T. Liang; G. R. Liao; D. X. Lin; B. J. Liu; C. L. Liu; C. X. Liu; F. H. Liu; Fang Liu; Feng Liu; H. B. Liu; H. H. Liu; H. H. Liu; H. M. Liu; J. Liu; J. P. Liu; J. Y. Liu; K. Liu; K. Y. Liu; L. D. Liu; Q. Liu; S. B. Liu; X. Liu; X. X. Liu; Y. B. Liu; Z. A. Liu; Zhiqiang Liu; Zhiqing Liu; H. Loehner; X. C. Lou; H. J. Lu; J. G. Lu; R. Q. Lu; Y. Lu; Y. P. Lu; C. L. Luo; M. X. Luo; T. Luo; X. L. Luo; M. Lv; X. R. Lyu; F. C. Ma; H. L. Ma; L. L. Ma; Q. M. Ma; S. Ma; T. Ma; X. N. Ma; X. Y. Ma; F. E. Maas; M. Maggiora; Q. A. Malik; Y. J. Mao; Z. P. Mao; S. Marcello; J. G. Messchendorp; J. Min; T. J. Min; R. E. Mitchell; X. H. Mo; Y. J. Mo; H. Moeini; C. Morales Morales; K. Moriya; N. Yu. Muchnoi; H. Muramatsu; Y. Nefedov; F. Nerling; I. B. Nikolaev; Z. Ning; S. Nisar; S. L. Niu; X. Y. Niu; S. L. Olsen; Q. Ouyang; S. Pacetti; P. Patteri; M. Pelizaeus; H. P. Peng; K. Peters; J. L. Ping; R. G. Ping; R. Poling; Y. N. Pu; M. Qi; S. Qian; C. F. Qiao; L. Q. Qin; N. Qin; X. S. Qin; Y. Qin; Z. H. Qin; J. F. Qiu; K. H. Rashid; C. F. Redmer; H. L. Ren; M. Ripka; G. Rong; X. D. Ruan; V. Santoro; A. Sarantsev; M. Savrié; K. Schoenning; S. Schumann; W. Shan; M. Shao; C. P. Shen; P. X. Shen; X. Y. Shen; H. Y. Sheng; M. R. Shepherd; W. M. Song; X. Y. Song; S. Sosio; S. Spataro; B. Spruck; G. X. Sun; J. F. Sun; S. S. Sun; Y. J. Sun; Y. Z. Sun; Z. J. Sun; Z. T. Sun; C. J. Tang; X. Tang; I. Tapan; E. H. Thorndike; M. Tiemens; D. Toth; M. Ullrich; I. Uman; G. S. Varner; B. Wang; B. L. Wang; D. Wang; D. Y. Wang; K. Wang; L. L. Wang; L. S. Wang; M. Wang; P. Wang; P. L. Wang; Q. J. Wang; S. G. Wang; W. Wang; X. F. Wang; Y. D. Wang; Y. F. Wang; Y. Q. Wang; Z. Wang; Z. G. Wang; Z. H. Wang; Z. Y. Wang; D. H. Wei; J. B. Wei; P. Weidenkaff; S. P. Wen; U. Wiedner; M. Wolke; L. H. Wu; Z. Wu; L. G. Xia; Y. Xia; D. Xiao; Z. J. Xiao; Y. G. Xie; Q. L. Xiu; G. F. Xu; L. Xu; Q. J. Xu; Q. N. Xu; X. P. Xu; L. Yan; W. B. Yan; W. C. Yan; Y. H. Yan; H. X. Yang; L. Yang; Y. Yang; Y. X. Yang; H. Ye; M. Ye; M. H. Ye; J. H. Yin; B. X. Yu; C. X. Yu; H. W. Yu; J. S. Yu; C. Z. Yuan; W. L. Yuan; Y. Yuan; A. Yuncu; A. A. Zafar; A. Zallo; Y. Zeng; B. X. Zhang; B. Y. Zhang; C. Zhang; C. C. Zhang; D. H. Zhang; H. H. Zhang; H. Y. Zhang; J. J. Zhang; J. L. Zhang; J. Q. Zhang; J. W. Zhang; J. Y. Zhang; J. Z. Zhang; K. Zhang; L. Zhang; S. H. Zhang; X. J. Zhang; X. Y. Zhang; Y. Zhang; Y. H. Zhang; Z. H. Zhang; Z. P. Zhang; Z. Y. Zhang; G. Zhao; J. W. Zhao; J. Y. Zhao; J. Z. Zhao; Lei Zhao; Ling Zhao; M. G. Zhao; Q. Zhao; Q. W. Zhao; S. J. Zhao; T. C. Zhao; Y. B. Zhao; Z. G. Zhao; A. Zhemchugov; B. Zheng; J. P. Zheng; W. J. Zheng; Y. H. Zheng; B. Zhong; L. Zhou; Li Zhou; X. Zhou; X. K. Zhou; X. R. Zhou; X. Y. Zhou; K. Zhu; K. J. Zhu; S. Zhu; X. L. Zhu; Y. C. Zhu; Y. S. Zhu; Z. A. Zhu; J. Zhuang; B. S. Zou; J. H. Zou

2014-10-30T23:59:59.000Z

285

Elastodynamic and elastostatic Green tensors for homogeneous weak transversely isotropic media  

Science Journals Connector (OSTI)

......TRANSVERSE ISOTROPY ( W T I ) 3.1 Definitionof WTI We shall consider a weak transversely isotropic medium (hereafter called the WTI medium) with a vertical axis of rotation...I , am"denotes the parameters of the WTI medium, and Aa,,, Au,, and are small......

Václav Vavry?uk

1997-09-01T23:59:59.000Z

286

Global weak solutions to magnetic fluid flows with nonlinear Maxwell-Cattaneo heat transfer law  

E-Print Network [OSTI]

Global weak solutions to magnetic fluid flows with nonlinear Maxwell-Cattaneo heat transfer law F transfer in a magnetic fluid flow under the action of an applied magnetic field. Instead of the usual heat-Cattaneo law, heat transfer, magnetic field, magnetization AMS subject classifications: 76N10, 35Q35. 1

Boyer, Edmond

287

The electric organ discharge (EOD) of weakly electric fish generates transcutaneous electric currents that stimulate  

E-Print Network [OSTI]

2443 The electric organ discharge (EOD) of weakly electric fish generates transcutaneous electric object whose conductivity is different from that of water produces an electric image consisting for the formation of electric images. Rule 1: objects more conductive than water cause a local increase

Grant, Kirsty

288

The long, the short and the weak: the origin of gamma-ray bursts  

Science Journals Connector (OSTI)

...and the weak: the origin of gamma-ray-bursts Tsvi Piran 1 Omer Bromberg 1...the Universe . The origin of gamma-ray bursts (GRBs) is one of the most...the commonly used 2s limit. gamma ray bursts|supernova|neutron stars...

2013-01-01T23:59:59.000Z

289

Kinetic Pathways of Order-Disorder and Order-Order Transitions in Weakly Segregated Microstructured Systems  

Science Journals Connector (OSTI)

The kinetics of hexagonal to disordered and hexagonal to body-centered-cubic phase transitions in weakly segregated, microstructured systems (e.g., diblock copolymers) is studied using a time-dependent Ginzburg-Landau (TDGL) approach. Both computer simulation of the TDGL equation and analysis of a simplified two-mode model reveal nontrivial pathways during the transition.

Shuyan Qi and Zhen-Gang Wang

1996-03-04T23:59:59.000Z

290

The impact of camera optical alignments on weak lensing measures for the Dark Energy Survey  

Science Journals Connector (OSTI)

......weak lensing measures for the Dark Energy Survey Michelle L. Antonik 1 David...with specific reference to the Dark Energy Survey (DES). We compute optics...Suprime-Cam (HSC) survey 1 and the Dark Energy Survey: DES 2 ), telescopes under......

Michelle L. Antonik; David J. Bacon; Sarah Bridle; Peter Doel; David Brooks; Sue Worswick; Gary Bernstein; Rebecca Bernstein; Darren DePoy; Brenna Flaugher; Joshua A. Frieman; Michael Gladders; Gaston Gutierrez; Bhuvnesh Jain; Michael Jarvis; Stephen M. Kent; Ofer Lahav; S.-J. Parker; Aaron Roodman; Alistair R. Walker

2013-01-01T23:59:59.000Z

291

Weak lensing predictions for coupled dark energy cosmologies at non-linear scales  

Science Journals Connector (OSTI)

......models, for forthcoming ground-based [such as Dark Energy Survey (DES)] and space-based (Euclid) weak...lensing (WL) surveys - both a ground-based survey similar to the Dark Energy Survey (DES)1 and a space-based survey, i.e......

Emma Beynon; Marco Baldi; David J. Bacon; Kazuya Koyama; Cristiano Sabiu

2012-06-01T23:59:59.000Z

292

PISA Results and School Mathematics in Finland: strengths, weaknesses and future  

E-Print Network [OSTI]

420 PISA Results and School Mathematics in Finland: strengths, weaknesses and future George Malaty University of Joensuu, Finland, george.malaty@joensuu.fi Abstract The success of Finland in PISA is related of surprising can be related to the results of Finland in the International Mathematical Olympiads (IMO). Since

Spagnolo, Filippo

293

Weak electricity of the nucleon in the chiral quark-soliton model  

Science Journals Connector (OSTI)

The induced pseudotensor constant (weak electricity) of the nucleon is calculated in the framework of the chiral quark-soliton model. This quantity originates from G-parity violation and, hence, is proportional to mu-md. We obtain for mu-md=-5 MeV a value of gT/gA=-0.0038.

Hyun-Chul Kim; Maxim V. Polyakov; Klaus Goeke

1997-05-01T23:59:59.000Z

294

INTRODUCTION Weakly electric fish emit an electric organ discharge (EOD) that is  

E-Print Network [OSTI]

4272 INTRODUCTION Weakly electric fish emit an electric organ discharge (EOD) that is used; Hupé and Lewis, 2008; Triefenbach and Zakon, 2008). In wave-type electric fish, the EOD is quasi proximity, their EODs interact to produce emergent amplitude modulations (AM) at the difference frequency

295

Emergence of temporal-pattern sensitive neurons in the midbrain of weakly electric fish Gymnarchus niloticus  

E-Print Network [OSTI]

Emergence of temporal-pattern sensitive neurons in the midbrain of weakly electric fish Gymnarchus fish, Gymnarchus niloticus, to two stimulus parameters that are critical for its behavior the jamming frequencies of fish's own electric organ and that of a neighbor's. The second parameter is the spatial

Kawasaki, Masashi

296

Weak Bisimilarity between FiniteState Systems and BPA or Normed BPP is  

E-Print Network [OSTI]

Weak Bisimilarity between Finite­State Systems and BPA or Normed BPP is Decidable in Polynomial classes of infinite­state systems: context­free processes (BPA) and normed Basic Parallel Processes on the classes of infinite­state processes definable by the syn­ tax of BPA (Basic Process Algebra) and normed

Ã?ayr, Richard

297

A Chemical Potential "Battery" for Superfluid 4He Weak E. Hoskinson  

E-Print Network [OSTI]

A Chemical Potential "Battery" for Superfluid 4He Weak Links E. Hoskinson , Y. Sato , K. Penanen, similar to a simple battery or voltage source for analogous superconducting devices. We describe here power is balanced by thermal conduction through the walls of the inner volume, heat carried out

Packard, Richard E.

298

A Chemical Potential "Battery" for Superfluid 4He Weak E. Hoskinson  

E-Print Network [OSTI]

A Chemical Potential "Battery" for Superfluid 4He Weak Links E. Hoskinson , Y. Sato , K. Penanen, similar to a simple battery or voltage source for analogous superconducting devices. We describe here in the opposite direction: Is = -In. The steady-state T is reached when the heater power is balanced by thermal

Sato, Yuki

299

The Gross-Pitaevskii Soliton: Relating Weakly and Strongly Repulsive Bosonic condensates and the magnetic soliton  

E-Print Network [OSTI]

The Gross-Pitaevskii Soliton: Relating Weakly and Strongly Repulsive Bosonic condensates and the magnetic soliton Indubala I Satija 1,2 and Radha Balakrishnan3 1 Department of Physics, George Mason soliton of the Gross-Pitaevskii equation (GPE) that describes the Bose-Einstein con- densate (BEC) density

Satija, Indu

300

ACHILLES AND THE TURTLE IN THE MAZE OF THE WEAK MEASUREMENT  

E-Print Network [OSTI]

ACHILLES AND THE TURTLE IN THE MAZE OF THE WEAK MEASUREMENT I / Orly ALTER & Oron ZACHAR SCllool the cluilllpion, Socrates. 1 #12;Acllilles flnislled the game, alld tlley both joined tIle Turtle, WIIO was eat-reversal. That's very interesting. As a turtle, I encoullter symmetry under time-reversal in Quantum Theory

Utah, University of

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

WindEvaporation Feedback and Abrupt Seasonal Transitions of Weak, Axisymmetric Hadley Circulations  

E-Print Network [OSTI]

Wind­Evaporation Feedback and Abrupt Seasonal Transitions of Weak, Axisymmetric Hadley Circulations dynamics because the barotropic component of the Hadley circulation, which is coupled to the baroclinic-equatorial Hadley cell can create barotropic westerlies that constructively add to the baroclinic wind

302

Applied Radiation and Isotopes 64 (2006) 6062 Weak energy dependence of EBT gafchromic film dose  

E-Print Network [OSTI]

is almost free of all these drawbacks. Its response is relatively energy-independent, and its sensitivityApplied Radiation and Isotopes 64 (2006) 60­62 Weak energy dependence of EBT gafchromic film dose of Physics and Materials Science, City University of Hong Kong, Kowloon Tong, Hong Kong b Department

Yu, K.N.

303

Coating Flows of Non-Newtonian Fluids: Weakly and Strongly Elastic Limits  

E-Print Network [OSTI]

Coating Flows of Non-Newtonian Fluids: Weakly and Strongly Elastic Limits J. Ashmore(1,a), A.Q. Shen(1,b), H.P. Kavehpour(2,c), H.A. Stone(1) & G.H. McKinley(2) 1: Division of Engineering and Applied of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139 (a): Current address: TIAX

304

Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering  

SciTech Connect (OSTI)

We examine the influence of percent-level dark energy corrections to the nonlinear matter power spectrum on constraints of the dark energy equation of state from future weak lensing probes. We explicitly show that a poor approximation (off by > or approx.10%) to the nonlinear corrections causes a > or approx. 1{sigma} bias on the determination of the dark energy equation of state. Future weak lensing surveys must therefore incorporate dark energy modifications to the nonlinear matter power spectrum accurate to the percent-level, to avoid introducing significant bias in their measurements. For the WMAP5 cosmology, the more accurate power spectrum is more sensitive to dark energy properties, resulting in a factor of 2 improvement in dark energy equation of state constraints. We explore the complementary constraints on dark energy from future weak lensing and supernova surveys. A space-based, Joint Dark Energy Mission-like survey measures the equation of state in five independent redshift bins to {approx}10%, while this improves to {approx}5% for a wide-field ground-based survey like the Large Synoptic Survey Telescope. These constraints are contingent upon our ability to control weak lensing systematic uncertainties to the sub-percent level.

Joudaki, Shahab; Cooray, Asantha; Holz, Daniel E. [Center for Cosmology, Department of Physics and Astronomy, University of California, Irvine, California 92697 (United States); Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2009-07-15T23:59:59.000Z

305

Weak lensing and dark energy: The impact of dark energy on nonlinear dark matter clustering  

Science Journals Connector (OSTI)

We examine the influence of percent-level dark energy corrections to the nonlinear matter power spectrum on constraints of the dark energy equation of state from future weak lensing probes. We explicitly show that a poor approximation (off by ?10%) to the nonlinear corrections causes a ?1? bias on the determination of the dark energy equation of state. Future weak lensing surveys must therefore incorporate dark energy modifications to the nonlinear matter power spectrum accurate to the percent-level, to avoid introducing significant bias in their measurements. For the WMAP5 cosmology, the more accurate power spectrum is more sensitive to dark energy properties, resulting in a factor of 2 improvement in dark energy equation of state constraints. We explore the complementary constraints on dark energy from future weak lensing and supernova surveys. A space-based, Joint Dark Energy Mission-like survey measures the equation of state in five independent redshift bins to ?10%, while this improves to ?5% for a wide-field ground-based survey like the Large Synoptic Survey Telescope. These constraints are contingent upon our ability to control weak lensing systematic uncertainties to the sub-percent level.

Shahab Joudaki; Asantha Cooray; Daniel E. Holz

2009-07-08T23:59:59.000Z

306

Combining weak lensing tomography with halo clustering to probe dark energy  

Science Journals Connector (OSTI)

Two methods of constraining the properties of dark energy are weak lensing tomography and cluster counting. Uncertainties in mass calibration of clusters can be reduced by using the properties of halo clustering (the clustering of clusters). However, within a single survey, weak lensing and halo clustering probe the same density fluctuations. We explore the question of whether this information can be used twice—once in weak lensing and then again in halo clustering to calibrate cluster masses—or whether the combined dark energy constraints are weaker than the sum of the individual constraints. For a survey like the Dark Energy Survey (DES), we find that the cosmic shearing of source galaxies at high redshifts is indeed highly correlated with halo clustering at lower redshifts. Surprisingly, this correlation does not degrade cosmological constraints for a DES-like survey, and in fact, constraints are marginally improved since the correlations themselves act as additional observables. This considerably simplifies the analysis for a DES-like survey: when weak lensing and halo clustering are treated as independent experiments, the combined dark energy constraints (cluster counts included) are accurate if not slightly conservative. Our findings mirror those of Takada and Bridle, who investigated correlations between the cosmic shear and cluster counts.

Charles Shapiro and Scott Dodelson

2007-10-18T23:59:59.000Z

307

Ion distribution in multilayers of weak polyelectrolytes: A neutron reflectometry study  

E-Print Network [OSTI]

Ion distribution in multilayers of weak polyelectrolytes: A neutron reflectometry study Oleh M 2008; published online 22 August 2008 Neutron reflectometry was used to determine the distribution in the formation of these PEMs.10 Recently neutron reflectometry studies on poly 5- 2- trifluoromethyl-1

Barrett, Christopher

308

Ion-acoustic waves in a plasma consisting of adiabatic warm ions, nonisothermal electrons, and a weakly relativistic electron beam: Linear and higher-order nonlinear effects  

SciTech Connect (OSTI)

The nonlinear propagation of finite amplitude ion acoustic solitary waves in a plasma consisting of adiabatic warm ions, nonisothermal electrons, and a weakly relativistic electron beam is studied via a two-fluid model. A multiple scales technique is employed to investigate the nonlinear regime. The existence of the electron beam gives rise to four linear ion acoustic modes, which propagate at different phase speeds. The numerical analysis shows that the propagation speed of two of these modes may become complex-valued (i.e., waves cannot occur) under conditions which depend on values of the beam-to-background-electron density ratio {alpha}, the ion-to-free-electron temperature ratio {sigma}, and the electron beam velocity v{sub 0}; the remaining two modes remain real in all cases. The basic set of fluid equations are reduced to a Schamel-type equation and a linear inhomogeneous equation for the first and second-order potential perturbations, respectively. Stationary solutions of the coupled equations are derived using a renormalization method. Higher-order nonlinearity is thus shown to modify the solitary wave amplitude and may also deform its shape, even possibly transforming a simple pulse into a W-type curve for one of the modes. The dependence of the excitation amplitude and of the higher-order nonlinearity potential correction on the parameters {alpha}, {sigma}, and v{sub 0} is numerically investigated.

Esfandyari-Kalejahi, A. [Faculty of Science, Department of Physics, Azerbaijan University of Tarbiat Moallem, 51745-406 Tabriz (Iran, Islamic Republic of); Kourakis, I. [Center for Plasma Physics (CPP), Department of Physics and Astronomy, Queen's University Belfast, BT7 1 NN Northern Ireland (United Kingdom); Institut fuer Theoretische Physik IV, Fakultaet fuer Physik und Astronomie, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany); Shukla, P. K. [Institut fuer Theoretische Physik IV, Fakultaet fuer Physik und Astronomie, Ruhr-Universitaet Bochum, D-44780 Bochum (Germany)

2008-02-15T23:59:59.000Z

309

Remaining Sites Verification Package for the 100-D-9 Boiler Fuel Oil Tank Site, Waste Site Reclassification Form 2006-030  

SciTech Connect (OSTI)

The 100-D-9 site is the former location of an underground storage tank used for holding fuel for the 184-DA Boiler House. Results of soil-gas samples taken from six soil-gas probes in a rectangle around the site the tank had been removed from concluded that there were no volatile organic compounds at detectable levels in the area. The 100-D-9 Boiler Fuel Oil Tank Site meets the remedial action objectives specified in the Remaining Sites ROD. The results demonstrated that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2006-08-10T23:59:59.000Z

310

Remaining Sites Verification Package for the 1607-B2 Septic System and 100-B-14:2 Sanitary Sewer System, Waste Site Reclassification Form 2006-055  

SciTech Connect (OSTI)

The 1607-B2 waste site is a former septic system associated with various 100-B facilities, including the 105-B, 108-B, 115-B/C, and 185/190-B buildings. The site was evaluated based on confirmatory results for feeder lines within the 100-B-14:2 subsite and determined to require remediation. The 1607-B2 waste site has been remediated to achieve the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-03-21T23:59:59.000Z

311

Light Water Reactor Sustainability (LWRS) Program – Non-Destructive Evaluation (NDE) R&D Roadmap for Determining Remaining Useful Life of Aging Cables in Nuclear Power Plants  

SciTech Connect (OSTI)

Executive Summary [partial] The purpose of the non-destructive evaluation (NDE) R&D Roadmap for Cables is to support the Materials Aging and Degradation (MAaD) R&D pathway. A workshop was held to gather subject matter experts to develop the NDE R&D Roadmap for Cables. The focus of the workshop was to identify the technical gaps in detecting aging cables and predicting their remaining life expectancy. The workshop was held in Knoxville, Tennessee, on July 30, 2012, at Analysis and Measurement Services Corporation (AMS) headquarters. The workshop was attended by 30 experts in materials, electrical engineering, and NDE instrumentation development from the U.S. Nuclear Regulatory Commission (NRC), U.S. Department of Energy (DOE) National Laboratories (Oak Ridge National Laboratory, Pacific Northwest National Laboratory, Argonne National Laboratory, and Idaho National Engineering Laboratory), universities, commercial NDE service vendors and cable manufacturers, and the Electric Power Research Institute (EPRI).

Simmons, K.L.; Ramuhali, P.; Brenchley, D.L.; Coble, J.B.; Hashemian, H.M.; Konnick, R.; Ray, S.

2012-09-01T23:59:59.000Z

312

Light Water Reactor Sustainability (LWRS) Program – Non-Destructive Evaluation (NDE) R&D Roadmap for Determining Remaining Useful Life of Aging Cables in Nuclear Power Plants  

SciTech Connect (OSTI)

The purpose of the non-destructive evaluation (NDE) R&D Roadmap for Cables is to support the Materials Aging and Degradation (MAaD) R&D pathway. The focus of the workshop was to identify the technical gaps in detecting aging cables and predicting their remaining life expectancy. The workshop was held in Knoxville, Tennessee, on July 30, 2012, at Analysis and Measurement Services Corporation (AMS) headquarters. The workshop was attended by 30 experts in materials, electrical engineering, U.S. Nuclear Regulatory Commission (NRC), U.S. Department of Energy (DOE) National Laboratories (Oak Ridge National Laboratory, Pacific Northwest National Laboratory, Argonne National Laboratory, and Idaho National Engineering Laboratory), NDE instrumentation development, universities, commercial NDE services and cable manufacturers, and Electric Power Research Institute (EPRI). The motivation for the R&D roadmap comes from the need to address the aging management of in-containment cables at nuclear power plants (NPPs).

Simmons, Kevin L.; Ramuhalli, Pradeep; Brenchley, David L.; Coble, Jamie B.; Hashemian, Hash; Konnik, Robert; Ray, Sheila

2012-09-14T23:59:59.000Z

313

Remaining Sites Verification Package for the 100-F-46, 119-F Stack Sampling French Drain, Waste Site Reclassification Form 2008-021  

SciTech Connect (OSTI)

The 100-F-46 french drain consisted of a 1.5 to 3 m long, vertically buried, gravel-filled pipe that was approximately 1 m in diameter. Also included in this waste site was a 5 cm cast-iron pipeline that drained condensate from the 119-F Stack Sampling Building into the 100-F-46 french drain. In accordance with this evaluation, the confirmatory sampling results support a reclassification of this site to No Action. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. The results of confirmatory sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

J. M. Capron

2008-08-08T23:59:59.000Z

314

Remaining Sites Verification Package for the 100-C-9:1 Main Process Sewer Collection Line, Waste Site Reclassification Form 2004-012  

SciTech Connect (OSTI)

The 100-C-9:1 main process sewer pipeline, also known as the twin box culvert, was a dual reinforced process sewer that collected process effluent from the 183-C and 190-C water treatment facilities, discharging at the 132-C-2 Outfall. For remedial action purposes, the 100-C-9:1 waste site was subdivided into northern and southern sections. The 100-C-9:1 subsite has been remediated to achieve the remedial action objectives specified in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-06-11T23:59:59.000Z

315

Remaining Sites Verification Package for the 128-F-2, 100-F Burning Pit Waste Site, Waste Site Reclassification Form 2008-031  

SciTech Connect (OSTI)

The 128-F-2 waste site consisted of multiple burn and debris filled pits located directly east of the 107-F Retention Basin and approximately 30.5 m east of the northeast corner of the 100-F Area perimeter road that runs along the riverbank. The burn pits were used for incinerating nonradioactive, combustible materials from 1945 to 1965. In accordance with this evaluation, the verification sampling results support a reclassification of this site to Interim Closed Out. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

J. M. Capron

2008-12-01T23:59:59.000Z

316

Remaining Sites Verification Package for the 100-F-26:9, 1607-F2 Sanitary Sewer Pipelines, Waste Site Reclassification Form 2008-029  

SciTech Connect (OSTI)

The 100-F-26:9 underground pipeline subsite consists of the sanitary sewers servicing the 105-F, 108-F, 184-F, 185-F, and 190-F buildings, and the 1700-F administration and service buildings (1704-F, 1707-F, 1707-FA, 1713-F, 1717-F, 1719-F, and 1722-F). In accordance with this evaluation, the confirmatory and verification sampling results support a reclassification of this site to Interim Closed Out. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

J. M. Capron

2008-10-29T23:59:59.000Z

317

Remaining Sites Verification Package for the 100-B-20, 1716-B Maintenance Garage Underground Tank, Waste Site Reclassification Form 2006-019  

SciTech Connect (OSTI)

The 100-B-20 waste site, located in the 100-BC-1 Operable Unit of the Hanford Site, consisted of an underground oil tank that once serviced the 1716-B Maintenance Garage. The selected action for the 100-B-20 waste site involved removal of the oil tanks and their contents and demonstrating through confirmatory sampling that all cleanup goals have been met. In accordance with this evaluation, a reclassification status of interim closed out has been determined. The results demonstrate that the site will support future unrestricted land uses that can be represented by a rural-residential scenario. These results also show that residual concentrations support unrestricted future use of shallow zone soil and that contaminant levels remaining in the soil are protective of groundwater and the Columbia River.

L. M. Dittmer

2006-09-27T23:59:59.000Z

318

An evaluation of known remaining oil resources in the state of California: Project on advanced oil recovery and the states. Volume 2  

SciTech Connect (OSTI)

The Interstate Oil and Gas Compact Commission (IOGCC) has conducted a series of studies to evaluate the known, remaining oil resource in twenty-three (23) states. The primary objective of die IOGCC`s effort is to examine the potential impact of an aggressive and focused program of research, development, and demonstration (RD&D) and technology transfer on future oil recovery in the United States. As part of a larger effort by the IOGCC, this report focuses on the potential economic benefits of improved oil recovery in the state of California. Individual reports for seven other oil producing states and a national report have been separately published by the IOGCC. Several major technical insights for state and Federal policymakers and regulators can be reached from this analysis. Overall, well abandonments and more stringent environmental regulations could limit economic access to the nation`s known, remaining oil resource. The high risk of near-term abandonment and the significant benefits of future application of improved oil recovery technoloy, clearly point to a need for more aggressive transfer of currently available technologies to domestic oil producers. Development and application of advanced oil recovery technologies could leave even greater benefits to the nation. A collaborative, focused RD&D effort, integrating the resources and expertise of industry, state and local governments, and the Federal government, is clearly warranted. With effective RD&D and a program of aggressive technology transfer to widely disseminate its results, California oil production could be maximized. The resulting increase and improvement in production rates, employment, operator profits, state and Federal tax revenues, energy security will benefit both the state of California and the nation as a whole.

NONE

1993-11-01T23:59:59.000Z

319

An evaluation of known remaining oil resources in the United States: Project on advanced oil recovery and the states. Volume 1  

SciTech Connect (OSTI)

The Interstate Oil and Gas Compact Commission (IOGCC) has conducted a series of studies to evaluate the known, remaining oil resource in twenty-three (23) states. The primary objective of die IOGCC`s effort is to examine the potential impact of an aggressive and focused program of research, development, and demonstration (RD&D) and technology transfer on future oil recovery in the United States. As part of a larger effort by the IOGCC, this report focuses on the potential economic, social, and political benefits of improved oil recovery to the nation as a whole. Individual reports for major oil producing states have been separately published. The individual state reports include California, Illinois, Kansas, Louisiana, New Mexico, Oklahoma, Texas, and Wyoming. Overall, well abandonments and more stringent environmental regulations could limit economic access to the nation`s known, remaining oil resource. The high risk of near-term abandonment and the significant benefits of future application of improved oil recovery technoloy, clearly point to a need for more aggressive transfer of currently available technologies to domestic oil producers. Development and application of advanced oil recovery technologies could leave even greater benefits to the nation. A collaborative, focused RD&D effort, integrating the resources and expertise of industry, state and local governments, and the Federal government, is clearly warranted. With effective RD&D and a program of aggressive technology transfer to widely disseminate its results, domestic oil production could be maximized. The resulting increase and improvement in production rates, employment, operator profits, state and Federal tax revenues, energy security will benefit the nation as a whole.

NONE

1993-11-01T23:59:59.000Z

320

An evaluation of known remaining oil resources in the state of California. Volume 2, Project on Advanced Oil Recovery and the States  

SciTech Connect (OSTI)

The Interstate Oil and Gas Compact Commission (IOGCC) has conducted a series of studies to evaluate the known, remaining oil resource in twenty-three (23) states. The primary objective of the IOGCC`s effort is to examine the potential impact of an aggressive and focused program of research, development, and demonstration (RD&D) and technology transfer on future oil recovery in the United States. As a part of this larger effort by the IOGCC, this report focuses on the potential economic benefits of improved oil recovery in the state of California. Individual reports for seven other oil producing states and a national report have been separately published by the IOGCC. The analysis presented in this report is based on the databases and models available in the Tertiary Oil Recovery Information System (TORIS). Overall, well abandonments and more stringent environmental regulations could limit economic access to California`s known, remaining oil resource. The high risk of near-term abandonment and the significant benefits of future application of improved oil recovery technology, clearly point to a need for more aggressive transfer of currently available technologies to oil producers. Development and application of advanced oil recovery technologies could have even greater benefits to the state and the nation. A collaborative, focused RD&D effort, integrating the resources and expertise of industry, state and local governments, and the Federal government, is clearly warranted. With effective RD&D and a program of aggressive technology transfer to widely disseminate its results, California oil production could be maximized. The resulting increase in production rates, employment, operator profits, state and Federal tax revenues, and energy security will benefit both the state of California and the nation as a whole.

Not Available

1994-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
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321

An evaluation of known remaining oil resources in the state of New Mexico and Wyoming. Volume 4, Project on Advanced Oil Recovery and the States  

SciTech Connect (OSTI)

The Interstate Oil and Gas Compact Commission (IOGCC) has conducted a series of studies to evaluate the known, remaining oil resource in twenty-three (23) states. The primary objective of the IOGCC`s effort is to examine the potential impact of an aggressive and focused program of research, development, and demonstration (RD&D) and technology transfer on future oil recovery in the United States. As part of a larger effort by the IOGCC, this report focuses on the potential economic benefits of improved oil recovery in the states of New Mexico and Wyoming. Individual reports for six other oil producing states and a national report have been separately published by the IOGCC. The analysis presented in this report is based on the databases and models available in the Tertiary Oil Recovery Information System (TORIS). Overall, well abandonments and more stringent environmental regulations could limit economic access to New Mexico`s known, remaining oil resource. The high risk of near-term abandonment and the significant benefits of future application of improved oil recovery technology, clearly point to a need for more aggressive transfer of currently available technologies to domestic oil producers. Development and application of advanced oil recovery technologies could have even greater benefits to the state and the nation. A collaborative, focused RD&D effort, integrating the resources and expertise of industry, state and local governments, and the Federal government, is clearly warranted. With effective RD&D and a program of aggressive technology transfer to widely disseminate its results, oil production could be maximized. The resulting increase in production rates, employment, operator profits, state and Federal tax revenues, and energy security will benefit both the states of New Mexico and Wyoming and the nation as a whole.

Not Available

1994-11-01T23:59:59.000Z

322

Five components of the ethylene-response pathway identified in a screen for weak ethylene-insensitive  

E-Print Network [OSTI]

Five components of the ethylene-response pathway identified in a screen for weak ethylene) Five ethylene-insensitive loci (wei1­wei5) were identified by using a low-dose screen for ``weak'' ethylene-insensitive mutants. wei1, wei2, and wei3 seedlings showed hormone insensitivity only in roots

Ausubel, Frederick M.

323

Wellbore stability model for shale gas reservoir considering the coupling of multi-weakness planes and porous flow  

Science Journals Connector (OSTI)

Abstract Irregular wellbore collapse phenomena and accidents frequently occur during drilling operations in Longmaxi shale gas reservoir. Considering shale formation with natural cross beddings and fractures, we propose a multi-weakness plane instead of a single weakness plane failure model. Shale samples obtained from the Lower Silurian Longmaxi Strata of Sichuan Basin are investigated based on characterization and analysis of mineralogy, pore structure, sliding failure condition, and rock mechanics to study the impact of porous flow on jointed shale masses. Results show that Longmaxi gas shale is a brittle and fracture-prone material with poor hydrating capacity and extremely low permeability in rock matrices. Reduction of rock strength under porous flow may contribute to changes in intensity parameters of the weakness planes. Therefore, considering the failure of multi-weakness planes under porous flow, we present a wellbore stability model for shale gas reservoir. Two types of weakness plane distribution patterns are examined to discuss the effect of the occurrence, numbers, and water saturation of weakness planes. The results demonstrate that the number of weakness planes, difference in weakness plane occurrence, and diverse water saturation levels significantly affect wellbore stability during drilling.

Chuan Liang; Mian Chen; Yan Jin; Yunhu Lu

2014-01-01T23:59:59.000Z

324

Stability of surface states of weak Z2 topological insulators and superconductors  

Science Journals Connector (OSTI)

We study the stability against disorder of surface states of weak Z2 topological insulators (superconductors) which are stacks of strong Z2 topological insulators (superconductors), considering representative Dirac Hamiltonians in the Altland-Zirnbauer symmetry classes in various spatial dimensions. We show that, in the absence of disorder, surface Dirac fermions of weak Z2 topological insulators (superconductors) can be gapped out by a Dirac mass term which couples surface Dirac cones and leads to breaking of a translation symmetry (dimerization). The dimerization mass is a unique Dirac mass term in the surface Dirac Hamiltonian, and the two dimerized gapped phases which differ in the sign of the Dirac mass are distinguished by a Z2 index. In other words the dimerized surfaces can be regarded as a strong Z2 topological insulator (superconductor). We argue that the surface states are not localized by disorder when the ensemble average of the Dirac mass term vanishes.

Takahiro Morimoto and Akira Furusaki

2014-01-13T23:59:59.000Z

325

Hydrogen economy in China: Strengths–weaknesses–opportunities–threats analysis and strategies prioritization  

Science Journals Connector (OSTI)

Abstract The objective of this paper is to analyze the internal and external environment of hydrogen economy in China using strengths–weaknesses–opportunities–threats (SWOT) analytical method, and then to prioritize the strategies for promoting the development of hydrogen economy in China. After the key strengths, weaknesses, opportunities and threats of the hydrogen economy in China were identified and nine effective strategies were proposed, a multi-criteria decision-making method by integrating goal programming and fuzzy theory has been developed for prioritizing these strategies, which can help the stakeholders/decision-makers to implement these strategies appropriately, The proposed method is not limited to China, and it is a generic method that can also be used to study the hydrogen economy of other regions.

Jingzheng Ren; Suzhao Gao; Shiyu Tan; Lichun Dong

2015-01-01T23:59:59.000Z

326

Implicit large eddy simulations of anisotropic weakly compressible turbulence with application to core-collapse supernovae  

E-Print Network [OSTI]

(Abridged) In the implicit large eddy simulation (ILES) paradigm, the dissipative nature of high-resolution shock-capturing schemes is exploited to provide an implicit model of turbulence. Recent 3D simulations suggest that turbulence might play a crucial role in core-collapse supernova explosions, however the fidelity with which turbulence is simulated in these studies is unclear. Especially considering that the accuracy of ILES for the regime of interest in CCSN, weakly compressible and strongly anisotropic, has not been systematically assessed before. In this paper we assess the accuracy of ILES using numerical methods most commonly employed in computational astrophysics by means of a number of local simulations of driven, weakly compressible, anisotropic turbulence. We report a detailed analysis of the way in which the turbulent cascade is influenced by the numerics. Our results suggest that anisotropy and compressibility in CCSN turbulence have little effect on the turbulent kinetic energy spectrum and a...

Radice, David; Ott, Christian D

2015-01-01T23:59:59.000Z

327

Invisible Higgs in weak bosons associative production with heavy quarks at LHC: probing mass and width  

E-Print Network [OSTI]

New physics coupled to the Higgs boson may hide it in the standard decay channels to be investigated at LHC. We consider the models where new invisible dominant decay modes of the Higgs boson are responsible for this hiding. We propose to study at LHC the weak boson production associated with heavy quarks: our analysis revealed that boson pair invariant mass distribution is sensitive to both mass and width of the invisible Higgs boson, if it is not too far from the weak boson pair threshold. We present tree-level results for the most relevant cases of top quarks and of bottom quarks in Standard Model extensions with large $b$-quark Yukawa coupling. We argue that QCD corrections do not spoil these results allowing for unambiguous extraction of the Higgs boson mass and width from the analysis of large enough amount of data.

E. E. Boos; S. V. Demidov; D. S. Gorbunov

2010-10-26T23:59:59.000Z

328

A Primer for Electro-Weak Induced Low Energy Nuclear Reactions  

E-Print Network [OSTI]

In a series of papers, cited in the main body of the paper below, detailed calculations have been presented which show that electromagnetic and weak interactions can induce low energy nuclear reactions to occur with observable rates for a variety of processes. A common element in all these applications is that the electromagnetic energy stored in many relatively slow moving electrons can -under appropriate circumstances- be collectively transferred into fewer, much faster electrons with energies sufficient for the latter to combine with protons (or deuterons, if present) to produce neutrons via weak interactions. The produced neutrons can then initiate low energy nuclear reactions through further nuclear transmutations. The aim of this paper is to extend and enlarge upon various examples analyzed previously, present simplified order of magnitude estimates for each and to illuminate a common unifying theme amongst all of them.

Y. N. Srivastava; A. Widom; L. Larsen

2008-10-01T23:59:59.000Z

329

Triggered single photon emitters based on stimulated parametric scattering in weakly nonlinear systems  

E-Print Network [OSTI]

We introduce a scheme of single photon emission based on four-wave mixing in a three mode system with weak Kerr-type nonlinearity. A highly populated lower energy mode results in strong stimulated scattering of particle pairs out of the central mode, which consequently limits the central mode occupation. Thus, the system can be reduced to a $\\chi^{(2)}$ nonlinear medium with greatly enhanced interaction constant. As a model setup we consider dipolaritons in semiconductor microcavities. Using the master equation approach we show strong antibunching under continuous wave pump, which largely exceeds the conventional blockade mechanism. Finally, using a pulsed excitation we demonstrate theoretically an on-demand single photon emitter in a weakly nonlinear system.

Kyriienko, Oleksandr

2014-01-01T23:59:59.000Z

330

Triggered single photon emitters based on stimulated parametric scattering in weakly nonlinear systems  

E-Print Network [OSTI]

We introduce a scheme of single photon emission based on four-wave mixing in a three mode system with weak Kerr-type nonlinearity. A highly populated lower energy mode results in strong stimulated scattering of particle pairs out of the central mode, which consequently limits the central mode occupation. Thus, the system can be reduced to a $\\chi^{(2)}$ nonlinear medium with greatly enhanced interaction constant. As a model setup we consider dipolaritons in semiconductor microcavities. Using the master equation approach we show strong antibunching under continuous wave pump, which largely exceeds the conventional blockade mechanism. Finally, using a pulsed excitation we demonstrate theoretically an on-demand single photon emitter in a weakly nonlinear system.

Oleksandr Kyriienko; Timothy C. H. Liew

2014-09-09T23:59:59.000Z

331

Efficient Quantum-State Estimation by Continuous Weak Measurement and Dynamical Control  

SciTech Connect (OSTI)

We demonstrate a fast, robust, and nondestructive protocol for quantum-state estimation based on continuous weak measurement in the presence of a controlled dynamical evolution. Our experiment uses optically probed atomic spins as a test bed and successfully reconstructs a range of trial states with fidelities of {approx}90%. The procedure holds promise as a practical diagnostic tool for the study of complex quantum dynamics, the testing of quantum hardware, and as a starting point for new types of quantum feedback control.

Smith, Greg A.; Jessen, Poul S. [College of Optical Sciences, University of Arizona, Tucson, Arizona 85721 (United States); Silberfarb, Andrew; Deutsch, Ivan H. [Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131 (United States)

2006-11-03T23:59:59.000Z

332

Forward Compton Scattering with weak neutral current: constraints from sum rules  

E-Print Network [OSTI]

We generalize forward real Compton amplitude to the case of the interference of the electromagnetic and weak neutral current, formulate a low-energy theorem, relate the new amplitudes to the interference structure functions and obtain a new set of sum rules. We address a possible new sum rule that relates the product of the axial charge and magnetic moment of the nucleon to the 0th moment of the structure function $g_5(\

Gorchtein, Mikhail

2015-01-01T23:59:59.000Z

333

Kinetic roughening of aggregates of patchy colloids with strong and weak bonds  

E-Print Network [OSTI]

We study the irreversible aggregation of films of patchy spherical colloids with directional and selective interactions. We report a crossover of the interfacial roughening from the Kardar-Parisi-Zhang (KPZ) to the KPZ with quenched disorder (KPZQ) universality class when the difference between the strong and weak bonds is sufficiently large. We calculate the critical exponents and identify the crossover between the two regimes.

C. S. Dias; N. A. M. Araújo; M. M. Telo da Gama

2014-07-09T23:59:59.000Z

334

Parity violation in neutron capture on the proton: determining the weak pion-nucleon coupling  

E-Print Network [OSTI]

We investigate the parity-violating analyzing power in neutron capture on the proton at thermal energies in the framework of chiral effective field theory. By combining this analysis with a previous analysis of parity violation in proton-proton scattering, we are able to extract the size of the weak pion-nucleon coupling constant. The uncertainty is significant and dominated by the experimental error which is expected to be reduced soon.

de Vries, J; Meißner, Ulf-G; Nogga, A; Epelbaum, E; Kaiser, N

2015-01-01T23:59:59.000Z

335

Inhomogeneous broadening of polaritons in high-quality microcavities and weak localization  

Science Journals Connector (OSTI)

We theoretically study the elastic scattering of lower cavity polaritons on the static disorder in high quality semiconductor microcavities in the strong coupling regime. We consider the dominant contribution of the resonant scattering on localized exciton levels and calculate for a model density of states the corresponding elastic mean free path. Our analytical results compare well with available linewidth data and substantiate the possibility of weak localization.

M. Litinskaia; G.C. La Rocca; V.M. Agranovich

2001-10-08T23:59:59.000Z

336

I=12 contributions to ??+N???+N+?0 in the Weinberg weak-interaction model  

Science Journals Connector (OSTI)

We use a detailed dispersion-theoretic model for pion production in the (3, 3)-resonance region to calculate the ratio R=?(??+n???+n+?0)+?(??+p???+p+?0)2?(??+n??-+p+?0) in the Weinberg weak-interaction theory. We find that I=12 contributions do not substantially modify the earlier static model calculation of R given by B. W. Lee.

Stephen L. Adler

1974-01-01T23:59:59.000Z

337

Weak locking capacity of quantum channels can be much larger than private capacity  

E-Print Network [OSTI]

We show that it is possible for the so-called weak locking capacity of a quantum channel [Guha et al., PRX 4:011016, 2014] to be much larger than its private capacity. Both reflect different ways of capturing the notion of reliable communication via a quantum system while leaking almost no information to an eavesdropper; the difference is that the latter imposes an intrinsically quantum security criterion whereas the former requires only a weaker, classical condition. The channels for which this separation is most straightforward to establish are the complementary channels of classical-quantum (cq-)channels, and hence a subclass of Hadamard channels. We also prove that certain symmetric channels (related to photon number splitting) have positive weak locking capacity in the presence of a vanishingly small pre-shared secret, whereas their private capacity is zero. These findings are powerful illustrations of the difference between two apparently natural notions of privacy in quantum systems, relevant also to quantum key distribution (QKD): the older, naive one based on accessible information, contrasting with the new, composable one embracing the quantum nature of the eavesdropper's information. Assuming an additivity conjecture for constrained minimum output Renyi entropies, the techniques of the first part demonstrate a single-letter formula for the weak locking capacity of complements to cq-channels, coinciding with a general upper bound of Guha et al. for these channels. Furthermore, still assuming this additivity conjecture, this upper bound is given an operational interpretation for general channels as the maximum weak locking capacity of the channel activated by a suitable noiseless channel.

Andreas Winter

2014-03-25T23:59:59.000Z

338

Weak-localization, near-magnetism, and triplet-pairing superconductivity in three dimensions  

SciTech Connect (OSTI)

In three-dimensional nearly magnetic Fermi liquids, disorder due to impurity scattering is shown to enhance the paramagnon strength and to weaken the triplet superconductivity pair-breaking parameter (through weak-localization quantum effects). As a result (a) ''heavy fermion'' superconductors are good candidates to exhibit triplet pairing and (b) normal liquid /sup 3/He can be considered as both nearly magnetic and nearly localized.

Beal-Monod, M.T.

1985-02-01T23:59:59.000Z

339

An evaluation of known remaining oil resources in the United States: Project on advanced oil recovery and the states. Volume 1  

SciTech Connect (OSTI)

The Interstate Oil and Gas Compact Commission (IOGCC) has conducted a series of studies to evaluate the known, remaining oil resource in twenty-three (23) states. The primary objective of the IOGCC`s effort is to examine the potential impact of an aggressive and focused program of research, development, and demonstration (RD&D) and technology transfer on future oil recovery in the United States. As part of a larger effort by the IOGCC, this report focuses on the potential economic, social, and political benefits of improved oil recovery to the nation as a whole. Individual reports for major oil producing states have been separately published. The individual state reports include California, Illinois, Kansas, Louisiana, New Mexico, Oklahoma, Texas, and Wyoming. The analysis presented in this report is based on the databases and models available in the Tertiary Oil Recovery Information System (TORIS). TORIS is a tested and verified system maintained and operated by the Department of Energy`s Bartlesville Project Office. The TORTS system was used to evaluate over 2,300 major reservoirs in a consistent manner and on an individual basis, the results of which have been aggregated to arrive at the national total.

Not Available

1994-10-01T23:59:59.000Z

340

Higgs Gravitational Interaction, Weak Boson Scattering, and Higgs Inflation in Jordan and Einstein Frames  

E-Print Network [OSTI]

We study gravitational interaction of Higgs boson through the unique dimension-4 operator $\\xi H^\\dag H R$, with $H$ the Higgs doublet and $R$ the Ricci scalar curvature. We analyze the effect of this dimensionless nonminimal coupling $\\xi$ on weak gauge boson scattering in both Jordan and Einstein frames. We explicitly establish the longitudinal-Goldstone boson equivalence theorem with nonzero $\\xi$ coupling in both frames, and analyze the unitarity constraints. We study the $\\xi$-induced weak boson scattering cross sections at O(1-30)TeV scales, and propose to probe the Higgs-gravity coupling via weak boson scattering experiments at the LHC(14TeV) and the next generation pp colliders (50-100TeV). We further extend our study to Higgs inflation, and quantitatively derive the perturbative unitarity bounds via coupled channel analysis, under large field background at the inflation scale. We analyze the unitarity constraints on the parameter space in both the conventional Higgs inflation and the improved models in light of the recent BICEP2 data.

Jing Ren; Zhong-Zhi Xianyu; Hong-Jian He

2014-04-17T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Qweak: First Direct Measurement of the Weak Charge of the Proton  

SciTech Connect (OSTI)

The Qweak experiment at Hall C of Thomas Jefferson National Accelerator Facility has made the first direct measurement of the weak charge of the proton, QWp, through a precision measurement of the parity-violating asymmetry in elastic e-p scattering at low momentum transfer Q2= 0.025 (GeV/c)2 with incident electron beam energy of 1.155 GeV. The Qweak experiment, along with earlier results of parity violating elastic scattering experiments, is expected to determine the most precise value of QWp which is suppressed in the Standard Model. If this result is further combined with the 133Cs atomic parity violation (APV) measurement, significant constraints on the weak charge of the up quark, down quark, and neutron can be extracted. This data will also be used to determine the weak-mixing angle, sin2 ?W, with a relative uncertainty of < 0.5% that will provide a competitive measurement of the running of sin2 ?W to low Q2. An overview of the experiment and its results using the commissioning dataset, constituting approximately 4% of the data collected in the experiment, are reported here.

Nuruzzaman, NFN [Hampton University, JLAB

2014-04-01T23:59:59.000Z

342

PROBING PRIMORDIAL NON-GAUSSIANITY WITH WEAK-LENSING MINKOWSKI FUNCTIONALS  

SciTech Connect (OSTI)

We study the cosmological information contained in the Minkowski functionals (MFs) of weak gravitational lensing convergence maps. We show that the MFs provide strong constraints on the local-type primordial non-Gaussianity parameter f {sub NL}. We run a set of cosmological N-body simulations and perform ray-tracing simulations of weak lensing to generate 100 independent convergence maps of a 25 deg{sup 2} field of view for f {sub NL} = -100, 0 and 100. We perform a Fisher analysis to study the degeneracy among other cosmological parameters such as the dark energy equation of state parameter w and the fluctuation amplitude {sigma}{sub 8}. We use fully nonlinear covariance matrices evaluated from 1000 ray-tracing simulations. For upcoming wide-field observations such as those from the Subaru Hyper Suprime-Cam survey with a proposed survey area of 1500 deg{sup 2}, the primordial non-Gaussianity can be constrained with a level of f {sub NL} {approx} 80 and w {approx} 0.036 by weak-lensing MFs. If simply scaled by the effective survey area, a 20,000 deg{sup 2} lensing survey using the Large Synoptic Survey Telescope will yield constraints of f {sub NL} {approx} 25 and w {approx} 0.013. We show that these constraints can be further improved by a tomographic method using source galaxies in multiple redshift bins.

Shirasaki, Masato; Yoshida, Naoki; Nishimichi, Takahiro [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583 (Japan); Hamana, Takashi, E-mail: masato.shirasaki@ipmu.jp [National Astronomical Observatory of Japan, Tokyo 181-0015 (Japan)

2012-11-20T23:59:59.000Z

343

Complete Fusion of Weakly Bound Cluster-Type Nuclei at Near Barrier Energies  

E-Print Network [OSTI]

We consider the influence of breakup channels on the complete fusion of weakly bound cluster-type systems in terms of dynamic polarization potentials. It is argued that the enhancement of the cross section at sub-barrier energies may be consistent with recent experimental observations that nucleon transfer, often leading to breakup, is dominant compared to direct breakup. The main trends of the experimental complete fusion cross sections are analyzed in the framework of the Dynamic Polarization Potential approach. The qualitative conclusions are supported by CDCC calculations including a sequential breakup channel, the one neutron stripping of $^7$Li followed by the breakup of $^6$Li.

M. S. Hussein; P. R. S. Gomes; J. Lubian; R. Linares; L. F. Canto

2013-03-19T23:59:59.000Z

344

Complete Fusion of Weakly Bound Cluster-Type Nuclei at Near Barrier Energies  

E-Print Network [OSTI]

We consider the influence of breakup channels on the complete fusion of weakly bound cluster-type systems in terms of dynamic polarization potentials. It is argued that the enhancement of the cross section at sub-barrier energies may be consistent with recent experimental observations that nucleon transfer, often leading to breakup, is dominant compared to direct breakup. The main trends of the experimental complete fusion cross sections are analyzed in the framework of the Dynamic Polarization Potential approach. The qualitative conclusions are supported by CDCC calculations including a sequential breakup channel, the one neutron stripping of $^7$Li followed by the breakup of $^6$Li.

Hussein, M S; Lubian, J; Linares, R; Canto, L F

2013-01-01T23:59:59.000Z

345

Nuclear Matter Incompressibility Effect on the Cross Section of Fusion Reactions with a weakly bound projectile  

E-Print Network [OSTI]

Fusion reactions with a weakly bound projectile are studied using the double-folding model along with a repulsive interaction modifying term. Using this modified potential, including nuclear matter incompressibility effects, the fusion reaction cross sections and suppression parameters are calculated for 9Be +209Bi,208Pb,29Si and 27Al reactions. The results show that applying these effects at energies near the Coulomb barrier improves the agreement between the calculated and experimental cross sections, and modifies the mean values of the suppression parameter.

Seyyedi, S A

2015-01-01T23:59:59.000Z

346

Shear Viscosity in Weakly Coupled N-Component Scalar Field Theories  

E-Print Network [OSTI]

The rich phenomena of the shear viscosity (eta) to entropy density (s) ratio, eta/s, in weakly coupled N-component scalar field theories are studied. eta/s can have a "double dip" behavior due to resonances and the phase transition. If an explicit goldstone mass term is added, then eta/s can either decrease monotonically in temperature or, as seen in many other systems, reach a minimum at the phase transition. We also show how to go beyond the original variational approach to make the Boltzmann equation computation of eta systematic.

Jiunn-Wei Chen; Mei Huang; Chang-Tse Hsieh; Han-Hsin Lin

2010-10-15T23:59:59.000Z

347

The quark-hadron phase transition in weakly isospin-asymmetric nuclear matter  

E-Print Network [OSTI]

We consider the transition from quark to hadronic matter which may result during the cooling/expansion of the quark-gluon plasma formed in energetic collisions of weakly isospin-asymmetric ions. This transition involves the energy density of u and d quark matter and the one of nearly isospin-symmetric nuclear matter. Within bag models, the former entails knowledge of the bag pressure, a poorly constrained quantity. The bag pressure at high density can be fixed imposing equality of quark and nucleonic energy densities at the (assumed known) transition point. We find this value to be very model dependent.

Francesca Sammarruca

2010-09-06T23:59:59.000Z

348

Crossover from 2D to 3D in a Weakly Interacting Fermi Gas  

Science Journals Connector (OSTI)

We have studied the transition from two to three dimensions in a low temperature weakly interacting Li6 Fermi gas. Below a critical atom number N2D only the lowest transverse vibrational state of a highly anisotropic oblate trapping potential is occupied and the gas is two dimensional. Above N2D the Fermi gas enters the quasi-2D regime where shell structure associated with the filling of individual transverse oscillator states is apparent. This dimensional crossover is demonstrated through measurements of the cloud size and aspect ratio versus atom number.

P. Dyke; E. D. Kuhnle; S. Whitlock; H. Hu; M. Mark; S. Hoinka; M. Lingham; P. Hannaford; C. J. Vale

2011-03-11T23:59:59.000Z

349

Lattice-Boltzmann simulation of laser interaction with weakly ionized helium plasmas  

SciTech Connect (OSTI)

This paper presents a lattice Boltzmann method for laser interaction with weakly ionized plasmas considering electron impact ionization and three-body recombination. To simulate with physical properties of plasmas, the authors' previous work on the rescaling of variables is employed and the electromagnetic fields are calculated from the Maxwell equations by using the finite-difference time-domain method. To calculate temperature fields, energy equations are derived separately from the Boltzmann equations. In this way, we attempt to solve the full governing equations for plasma dynamics. With the developed model, the continuous-wave CO{sub 2} laser interaction with helium is simulated successfully.

Li Huayu; Ki, Hyungson [Department of Mechanical Engineering, Michigan State University, East Lansing, Michigan 48824-1226 (United States); School of Mechanical and Advanced Materials Engineering, Ulsan National Institute of Science and Technology, Ulsan (Korea, Republic of)

2010-07-15T23:59:59.000Z

350

Neutral weak-current two-body contributions in inclusive scattering from {sup 12}C  

SciTech Connect (OSTI)

An {\\it ab initio} calculation of the sum rules of the neutral weak response functions in $^{12}$C is reported, based on a realistic Hamiltonian, including two- and three-nucleon potentials, and on realistic currents, consisting of one- and two-body terms. We find that the sum rules of the response functions associated with the longitudinal and transverse components of the (space-like) neutral current are largest and that a significant portion ($\\simeq 30$\\%) of the calculated strength is due to two-body terms. This fact may have implications for the MiniBooNE and other neutrino quasi-elastic scattering data on nuclei.

Lovato, Alessandro [ANL; Gandolfi, Stefano [LANL; Carlson, Joseph [LANL; Pieper, S. C. [ANL; Schiavilla, Rocco [JLAB, ODU

2014-05-01T23:59:59.000Z

351

Parity-Violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor  

SciTech Connect (OSTI)

We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q2 = 0.038 (GeV/c)2. This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A = z3.51±0.57 (stat)±0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2 = 0.091 (GeV/c)2, which are also consistent with theoretical predictions.

Ito, Takeyasu; Averett, Todd; Barkhuff, David; Batigne, Guillaume; Beck, Douglas; Beise, Elizabeth; Blake, A.; Breuer, Herbert; Carr, Robert; Clasie, Benjamin; Covrig, Silviu; Danagoulian, Areg; Dodson, George; Dow, Karen; Dutta, Dipangkar; Farkhondeh, Manouchehr; Filippone, Bradley; FRANKLIN, W.; Furget, Christophe; Gao, Haiyan; Gao, Juncai; Gustafsson, Kenneth; Hannelius, Lars; Hasty, R.; Allen, Alice; Herda, M.C.; Jones, CE; King, Paul; Korsch, Wolfgang; Kowalski, Stanley; Kox, Serge; Kramer, Kevin; Lee, P.; Liu, Jinghua; Martin, Jeffery; McKeown, Robert; Mueller, B.; Pitt, Mark; Plaster, Bradley; Quemener, Gilles; Real, Jean-Sebastien; Ritter, J.; Roche, Julie; Savu, V.; Schiavilla, Rocco; Seely, Charles; Spayde, Damon; Suleiman, Riad; Taylor, S.; Tieulent, Raphael; Tipton, Bryan; Tsentalovich, E.; Wells, Steven; Yang, Bin; Yuan, Jing; Yun, Junho; Zwart, Townsend

2004-03-01T23:59:59.000Z

352

Exploring Fusion at Extreme Sub-Barrier Energies with Weakly Bound Nuclei  

SciTech Connect (OSTI)

Results of measurement of residues formed in fusion of {sup 6}Li with {sup 198}Pt in the energy range of 0.68weakly bound projectile confront the current understanding of the fusion hindrance at these low energies, underlying the role of internal reorganization on the dynamical path towards fusion.

Shrivastava, A. [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); GANIL, CEA/DSM-CNRS/IN2P3, Boulevard Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France); Navin, A.; Lemasson, A.; Rejmund, M. [GANIL, CEA/DSM-CNRS/IN2P3, Boulevard Henri Becquerel, BP 55027, F-14076 Caen Cedex 5 (France); Ramachandran, K.; Chatterjee, A.; Kailas, S.; Mahata, K.; Rout, P. C. [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); Nanal, V.; Pillay, R. G. [DNAP, Tata Institute of Fundamental Research, Mumbai 400005 (India); Hagino, K. [Department of Physics, Tohuku University, Sendai 980-8578 (Japan); Ichikawa, T. [Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502 (Japan); Bhattacharyya, S. [Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata 700064 (India); Parkar, V. V. [Nuclear Physics Division, Bhabha Atomic Research Centre, Mumbai 400085 (India); DNAP, Tata Institute of Fundamental Research, Mumbai 400005 (India)

2009-12-04T23:59:59.000Z

353

Curvilinear Motion of Multivortex Laser-Soliton Complexes with Strong and Weak Coupling  

Science Journals Connector (OSTI)

We reveal the existence of stable dissipative soliton complexes with curvilinear motion of their center of mass. This type of motion results from the field distribution asymmetry and is well pronounced for asymmetric complexes of laser solitons with strong coupling. We present results of numerical simulations of such complexes in a model of wide-aperture lasers or laser amplifiers with saturable gain and absorption. The complex consists of a pair of strongly coupled vortex solitons weakly coupled with a number of other vortex solitons. Similar complexes are expected to exist in different spatially distributed nonlinear dissipative systems, including schemes with discrete dissipative solitons.

Nikolay N. Rosanov; Sergey V. Fedorov; Anatoly N. Shatsev

2005-07-27T23:59:59.000Z

354

Case 34-2014 — A 7-Year-Old Boy with Focal Seizures and Progressive Weakness  

Science Journals Connector (OSTI)

...in the left motor strip involving the adjacent white matter and, in more recent studies, the parietal region, with no clear evidence of atrophy. A brain biopsy was recommended. The family sought a second opinion at this hospital. The patient was born at 36 weeks of gestation after the onset of preterm... A 7-year-old boy was evaluated because of focal seizures, twitching of the right arm and the right side of the face, and progressive weakness. Imaging revealed progressive left cortical atrophy and a focal lesion in the left parietal cortex. A diagnostic procedure was performed.

Thibert R.L.Duhaime A.-C.Caruso P.A.Stemmer-Rachamimov A.

2014-10-30T23:59:59.000Z

355

Nuclear Matter Incompressibility Effect on the Cross Section of Fusion Reactions with a weakly bound projectile  

E-Print Network [OSTI]

Fusion reactions with a weakly bound projectile are studied using the double-folding model along with a repulsive interaction modifying term. Using this modified potential, including nuclear matter incompressibility effects, the fusion reaction cross sections and suppression parameters are calculated for 9Be +209Bi,208Pb,29Si and 27Al reactions. The results show that applying these effects at energies near the Coulomb barrier improves the agreement between the calculated and experimental cross sections, and modifies the mean values of the suppression parameter.

S. A. Seyyedi; H. Golnarkar

2015-01-19T23:59:59.000Z

356

Solar-bound weakly interacting massive particles: a no-frills phenomenology  

E-Print Network [OSTI]

The case for a stable population of solar-bound Earth-crossing Weakly Interacting Massive Particles (WIMPs) is reviewed. A practical general expression for their speed distribution in the laboratory frame is derived under basic assumptions. If such a population exists -even with a conservative phase-space density-, the next generation of large-mass, low-threshold underground bolometers should bring about a sizable enhancement in WIMP sensitivity. Finally, a characteristic yearly modulation in their recoil signal, arising from the ellipticity of the Earth's orbit, is presented.

Juan I. Collar

1999-01-22T23:59:59.000Z

357

Apparatus and method for measurement of weak optical absorptions by thermally induced laser pulsing  

DOE Patents [OSTI]

The thermal lensing phenomenon is used as the basis for measurement of weak optical absorptions when a cell containing the sample to be investigated is inserted into a normally continuous-wave operation laser-pumped dye laser cavity for which the output coupler is deliberately tilted relative to intracavity circulating laser light, and pulsed laser output ensues, the pulsewidth of which can be related to the sample absorptivity by a simple algorithm or calibration curve. A minimum detection limit of less than 10[sup [minus]5] cm[sup [minus]1] has been demonstrated using this technique. 6 figs.

Cremers, D.A.; Keller, R.A.

1985-10-01T23:59:59.000Z

358

Weak Interaction Models with New Quarks and Right-handed Currents  

DOE R&D Accomplishments [OSTI]

We discuss various weak interaction issues for a general class of models within the SU(2) x U(1) gauge theory framework, with special emphasis on the effects of right-handed, charged currents and of quarks bearing new quantum numbers. In particular we consider the restrictions on model building which are imposed by the small KL - KS mass difference and by the .I = = rule; and we classify various possibilities for neutral current interactions and, in the case of heavy mesons with new quantum numbers, various possibilities for mixing effects analogous to KL - KS mixing.

Wilczek, F. A.; Zee, A.; Kingsley, R. L.; Treiman, S. B.

1975-06-00T23:59:59.000Z

359

Weak-Field Spherically Symmetric Solutions in $f(T)$ gravity  

E-Print Network [OSTI]

We study weak-field solutions having spherical symmetry in $f(T)$ gravity; to this end, we solve the field equations for a non diagonal tetrad, starting from Lagrangian in the form $f(T)=T+\\alpha T^{n}$, where $\\alpha$ is a small constant, parameterizing the departure of the theory from GR. We show that the classical spherically symmetric solutions of GR, i.e. the Schwarzschild and Schwarzschild-de Sitter solutions, are perturbed by terms in the form $\\propto r^{2-2n}$ and discuss the impact of these perturbations in observational tests.

Ruggiero, Matteo Luca

2015-01-01T23:59:59.000Z

360

Fermionic-bosonic couplings in a weakly deformed odd-mass nucleus, 4193Nb  

Science Journals Connector (OSTI)

A comprehensive level scheme of Nb93 below 2 MeV has been constructed from information obtained with the Nb93(n,n??) and the Zr94(p,2n??)Nb93 reactions. Branching ratios, lifetimes, transition multipolarities, and spin assignments have been determined. From M1 and E2 strengths, fermionic-bosonic excitations of isoscalar and isovector characters have been identified from the weak couplings of the ?1g9/2?4092Zr and ?2p1/2-1?4294Mo configurations. A microscopic interpretation of such excitations is obtained from shell-model calculations, which use low-momentum effective interactions.

J. N. Orce; J. D. Holt; A. Linnemann; C. J. McKay; C. Fransen; J. Jolie; T. T. S. Kuo; S. R. Lesher; M. T. McEllistrem; N. Pietralla; N. Warr; V. Werner; S. W. Yates

2010-10-25T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Dynamic performance of a STATCON at an HVDC inverter feeding a very weak AC system  

SciTech Connect (OSTI)

This paper investigates the dynamic performance of the advanced static var compensator or STATCON at a high voltage direct current (HVDC) converter terminal where the ac system has a very low short circuit ratio (SCR). The STATCON is based on a nine-level GTO thyristor inverter. The studies include operating characteristics of the STATCON under various ac and dc disturbances. The simulation results are compared with other types of reactive power compensation options available for such applications. It is shown that the STATCON has clear advantages over the other compensators, in areas such as; fault response time, voltage support ability, and dc recovery, while operating with very weak ac systems.

Zhuang, Y.; Menzies, R.W. [Univ. of Manitoba, Winnipeg, Manitoba (Canada)] [Univ. of Manitoba, Winnipeg, Manitoba (Canada); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada)] [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)] [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

362

EMTP modeling of CIGRE benchmark based HVDC transmission system operating with weak AC systems  

SciTech Connect (OSTI)

An EMTP based study of a CIGRE benchmark based HVDC system operating with weak ac systems is carried out. The modeled system provides a starting point for (a) educators teaching HVDC transmission courses and (b) for utility planners to develop their own low-cost dedicated digital simulators for training purposes. In this paper, modeling details of the ac-dc system, dc converters and control are presented. To validate the control schemes presented, the HVDC system is tested under ac-dc fault conditions. Results obtained from an EMTP-based study under these fault conditions are also presented in this paper.

Sood, V.K. [Hydro-Quebec, Varennes, Quebec (Canada); Khatri, V.; Jin, H. [Concordia Univ., Montreal, Quebec (Canada). Dept. of Electrical and Computer Engineering

1995-12-31T23:59:59.000Z

363

Weaknesses in the Key Scheduling Algorithm of Scott Fluhrer1, Itsik Mantin2, and Adi Shamir2  

E-Print Network [OSTI]

Weaknesses in the Key Scheduling Algorithm of RC4 Scott Fluhrer1, Itsik Mantin2, and Adi Shamir2 1 and previous results about its security. In Section 3 we consider a slightly mod- i ed variant of the Key

Sirer, Emin Gun

364

Coordination of EOD frequency and pulse duration in a weakly electric wave fish: the influence of androgens  

Science Journals Connector (OSTI)

The electric organ discharge (EOD) of wave-type weakly electric fish is ... organ pulses. Measurements of pulse duration and EOD frequency were made in the speciesSternopygus andEigenmannia.... Pulse duration is ...

Alice Mills; Harold H. Zakon

1987-01-01T23:59:59.000Z

365

Hormone-induced and maturational changes in electric organ discharges and electroreceptor tuning in the weakly electric fishApteronotus  

Science Journals Connector (OSTI)

Plasticity in the frequency of the electric organ discharge (EOD) and electroreceptor tuning of weakly electric fish...Apteronotus.... Both hormone-induced and maturational changes in EOD frequency and electrorec...

J. Harlan Meyer; Margaret Leong; Clifford H. Keller

1987-01-01T23:59:59.000Z

366

Supplementary testing is not required on the cobas 4800 CT/NG test for Neisseria gonorrhoeae weak positive urogenital samples.  

Science Journals Connector (OSTI)

...not required on the cobas 4800 CT/NG test for Neisseria gonorrhoeae weak positive...gonorrhoeae (NG) nucleic acid amplification test (NAAT) results are difficult to interpret...treatment should be based on clinical pre-test probability.

Collette Bromhead; Nadika Liyanarachchy; Julia Mayes; Arlo Upton; Michelle Balm

2014-11-12T23:59:59.000Z

367

Weakly regular T2 symmetric spacetimes. The future causal geometry of Gowdy spaces  

E-Print Network [OSTI]

We investigate the future asymptotic behavior of Gowdy spacetimes on T3, when the metric satisfies weak regularity conditions, so that the metric coefficients (in suitable coordinates) are only in the Sobolev space H1 or have even weaker regularity. The authors recently introduced this class of spacetimes in the broader context of T2 symmetric spacetimes and established the existence of a global foliation by spacelike hypersurfaces when the time function is chosen to be the area of the surfaces of symmetry. In the present paper, we identify the global causal geometry of these spacetimes and, in particular, establish that weakly regular Gowdy spacetimes are future causally geodesically complete. This result extends a theorem by Ringstr\\"om for metrics with sufficiently high regularity. We emphasize that our proof of the energy decay is based on an energy functional inspired by the Gowdy-to-Ernst transformation. In order to establish the geodesic completeness property, we prove a higher regularity property concerning the metric coefficients along timelike curves and we provide a novel analysis of the geodesic equation for Gowdy spacetimes, which does not require high-order regularity estimates. Even when sufficient regularity is assumed, our proof provides an alternative and shorter proof of the energy decay and of the geodesic completeness property for Gowdy spacetimes.

Philippe G. LeFloch; Jacques Smulevici

2014-03-25T23:59:59.000Z

368

High frequency electromagnetic modes in a weakly magnetized relativistic electron plasma  

SciTech Connect (OSTI)

Using the linearized Vlasov-Maxwell model, the polarization tensor for a weakly magnetized electron plasma is derived. For isotropic relativistic Maxwellian velocity distribution function, dispersion relations are obtained for both parallel and perpendicular propagations. The integrals (called Meijer G functions) that arise due to relativistic effects are examined in various limits and dispersion relations are derived for the nonrelativistic, weakly, strongly, and ultrarelativistic Maxwellian velocity distributions. It is generally observed that the propagation domains of the modes are enlarged as one proceeds from the nonrelativistic to the highly relativistic regime. Resultantly, due to the relativistic effects, the Whistler mode is suppressed in the R-wave, the nonpropagation band of X-mode is reduced, and the X-mode itself approaches the O-mode. Further, the results derived in the ultra- and nonrelativistic limits found to be in agreement with the earlier calculations [G. Abbas et al. Phys. Scr. 76, 649 (2007); F. F. Chen, Introduction to Plasma Physics and Controlled Fusion (Plenum, New York, 1984), Vol. 1].

Abbas, Gohar; Murtaza, G. [Department of Physics, G. C. University, Lahore 54000 (Pakistan); Kingham, R. J. [Plasma Physics Group, Imperial College, Blackett Laboratory, London SW7 2AZ (United Kingdom)

2010-07-15T23:59:59.000Z

369

Wide-Field Weak Lensing by RX J1347–1145  

Science Journals Connector (OSTI)

We present an analysis of weak-lensing observations for RX J1347-1145 over a 43' ? 43' field taken in B and R filters on the Blanco 4 m telescope at CTIO. RX J1347-1145 is a massive cluster at redshift z = 0.45. Using a population of galaxies with 20 R p v = 1400 km s-1 for a singular isothermal sphere model and r200 = 3.5 Mpc with c = 15 for an NFW model in an ?m = 0.3, ?? = 0.7 cosmology. In addition, a mass-to-light ratio M/LR = 90 ± 20 M?/LR? was determined. These values are consistent with the previous weak-lensing study of RX J1347-1145 by Fischer & Tyson, giving strong evidence that systemic bias was not introduced by the relatively small field of view in that study. Our best-fit parameter values are also consistent with recent X-ray studies by Allen et al. and Ettori et al. but are not consistent with recent optical velocity dispersion measurements by Cohen & Kneib.

Thomas P. Kling; Ian Dell'Antonio; David Wittman; J. Anthony Tyson

2005-01-01T23:59:59.000Z

370

Testing the weak-form efficiency of the WTI crude oil futures market  

Science Journals Connector (OSTI)

Abstract The weak-form efficiency of energy futures markets has long been studied and empirical evidence suggests controversial conclusions. In this work, nonparametric methods are adopted to estimate the Hurst indexes of the WTI crude oil futures prices (1983–2012) and a strict statistical test in the spirit of bootstrapping is put forward to verify the weak-form market efficiency hypothesis. The results show that the crude oil futures market is efficient when the whole period is considered. When the whole series is divided into three sub-series separated by the outbreaks of the Gulf War and the Iraq War, it is found that the Gulf War reduced the efficiency of the market. If the sample is split into two sub-series based on the signing date of the North American Free Trade Agreement, the market is found to be inefficient in the sub-periods during which the Gulf War broke out. The same analysis on short-time series in moving windows shows that the market is inefficient only when some turbulent events occur, such as the oil price crash in 1985, the Gulf war, and the oil price crash in 2008.

Zhi-Qiang Jiang; Wen-Jie Xie; Wei-Xing Zhou

2014-01-01T23:59:59.000Z

371

Measuring the axial form factor of {sup 3}He using weak capture of polarized electrons  

SciTech Connect (OSTI)

A low energy, high intensity polarized electron beam could enable the extraction of the A=3 weak axial form factors F{sub A} using the reaction ?e+{sup 3}He?{sup 3}H+?. These form factors have never been measured before. We discuss the feasibility of such an experiment using a small toroidal magnet and a radial low energy recoil detector to tag the recoil tritons. A moderately high intensity polarized electron beam (>500 ?A) with beam energies between 50 - 150 MeV is necessary for the cross section measurement and to provides a free clean measurement of the background. Moreover, in addition to the cross section, by measuring the electron spin and recoil triton correlation coefficient it may be possible to search for second class currents and to extract the ratio of the axial to the vector form factor of the nucleon. Such novel electron scattering based measurements would have a completely different set of systematic uncertainties compared to polarized neutron beta decay, neutrino scattering and muon capture experiments which are typically used to extract the weak form-factors.

Dutta, D. [Mississippi State University, Mississippi State, MS 39762 (United States)

2013-11-07T23:59:59.000Z

372

Microscopic Description of Entanglements in Polyethylene Networks and Melts: Strong, Weak, Pairwise, and Collective Attributes  

E-Print Network [OSTI]

We present atomistic molecular dynamics simulations of two Polyethylene systems where all entanglements are trapped: a perfect network, and a melt with grafted chain ends. We examine microscopically at what level topological constraints can be considered as a collective entanglement effect, as in tube model theories, or as certain pairwise uncrossability interactions, as in slip-link models. A pairwise parameter, which varies between these limiting cases, shows that, for the systems studied, the character of the entanglement environment is more pairwise than collective. We employ a novel methodology, which analyzes entanglement constraints into a complete set of pairwise interactions, similar to slip links. Entanglement confinement is assembled by a plethora of links, with a spectrum of confinement strengths, from strong to weak. The strength of interactions is quantified through a link `persistence', which is the fraction of time for which the links are active. By weighting links according to their strength, we show that confinement is imposed mainly by the strong ones, and that the weak, trapped, uncrossability interactions cannot contribute to the low frequency modulus of an elastomer, or the plateau modulus of a melt. A self-consistent scheme for mapping topological constraints to specific, strong binary links, according to a given entanglement density, is proposed and validated. Our results demonstrate that slip links can be viewed as the strongest pairwise interactions of a collective entanglement environment. The methodology developed provides a basis for bridging the gap between atomistic simulations and mesoscopic slip link models.

Stefanos D. Anogiannakis; Christos Tzoumanekas; Doros N. Theodorou

2013-01-30T23:59:59.000Z

373

The MOLLER Experiment: An Ultra-Precise Measurement of the Weak Mixing Angle Using Møller Scattering  

E-Print Network [OSTI]

The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded Jefferson Lab are presented. A highlight of the Fundamental Symmetries subfield of the 2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M{\\o}ller) scattering. The proposed MOLLER experiment will improve on this result by a factor of five, yielding the most precise measurement of the weak mixing angle at low or high energy anticipated over the next decade. This new result would be sensitive to the interference of the electromagnetic amplitude with new neutral current amplitudes as weak as $\\sim 10^{-3}\\cdot G_F$ from as yet undiscovered dynamics beyond the Standard Model. The resulting discovery reach is unmatched by any proposed experiment measuring a flavor- and CP-conserving process over the next decade, and yields a unique window to new physics at MeV and multi-TeV scales, complementary to direct searches at high energy colliders such as the Large Hadron Collider (LHC). The experiment takes advantage of the unique opportunity provided by the upgraded electron beam energy, luminosity, and stability at Jefferson Laboratory and the extensive experience accumulated in the community after a round of recent successfully completed parity-violating electron scattering experiments

MOLLER Collaboration; J. Benesch; P. Brindza; R. D. Carlini; J-P. Chen; E. Chudakov; S. Covrig; M. M. Dalton; A. Deur; D. Gaskell; A. Gavalya; J. Gomez; D. W. Higinbotham; C. Keppel; D. Meekins; R. Michaels; B. Moffit; Y. Roblin; R. Suleiman; R. Wines; B. Wojtsekhowski; G. Cates; D. Crabb; D. Day; K. Gnanvo; D. Keller; N. Liyanage; V. V. Nelyubin; H. Nguyen; B. Norum; K. Paschke; V. Sulkosky; J. Zhang; X. Zheng; J. Birchall; P. Blunden; M. T. W. Gericke; W. R. Falk; L. Lee; J. Mammei; S. A. Page; W. T. H. van Oers; K. Dehmelt; A. Deshpande; N. Feege; T. K. Hemmick; K. S. Kumar; T. Kutz; R. Miskimen; M. J. Ramsey-Musolf; S. Riordan; N. Hirlinger Saylor; J. Bessuille; E. Ihloff; J. Kelsey; S. Kowalski; R. Silwal; G. De Cataldo; R. De Leo; D. Di Bari; L. Lagamba; E. NappiV. Bellini; F. Mammoliti; F. Noto; M. L. Sperduto; C. M. Sutera; P. Cole; T. A. Forest; M. Khandekar; D. McNulty; K. Aulenbacher; S. Baunack; F. Maas; V. Tioukine; R. Gilman; K. Myers; R. Ransome; A. Tadepalli; R. Beniniwattha; R. Holmes; P. Souder; D. S. Armstrong; T. D. Averett; W. Deconinck; W. Duvall; A. Lee; M. L. Pitt; J. A. Dunne; D. Dutta; L. El Fassi; F. De Persio; F. Meddi; G. M. Urciuoli; E. Cisbani; C. Fanelli; F. Garibaldi; K. Johnston; N. Simicevic; S. Wells; P. M. King; J. Roche; J. Arrington; P. E. Reimer; G. Franklin; B. Quinn; A. Ahmidouch; S. Danagoulian; O. Glamazdin; R. Pomatsalyuk; R. Mammei; J. W. Martin; T. Holmstrom; J. Erler; Yu. G. Kolomensky; J. Napolitano; K. A. Aniol; W. D. Ramsay; E. Korkmaz; D. T. Spayde; F. Benmokhtar; A. Del Dotto; R. Perrino; S. Barkanova; A. Aleksejevs; J. Singh

2014-12-03T23:59:59.000Z

374

Positron impact excitations of hydrogen atom embedded in weakly coupled plasmas: Formation of Rydberg atoms  

SciTech Connect (OSTI)

Formation of Rydberg atoms due to 1s?nlm excitations of hydrogen, for arbitrary n, l, m, by positron impact in weakly coupled plasma has been investigated using a distorted-wave theory in the momentum space. The interactions among the charged particles in the plasma have been represented by Debye-Huckel potentials. Making use of a simple variationally determined wave function for the hydrogen atom, it has been possible to obtain the distorted-wave scattering amplitude in a closed analytical form. A detailed study has been made on the effects of plasma screening on the differential and total cross sections in the energy range 20–300?eV of incident positron. For the unscreened case, our results agree nicely with some of the most accurate results available in the literature. To the best of our knowledge, such a study on the differential and total cross sections for 1s?nlm inelastic positron-hydrogen collisions for arbitrary n, l, m in weakly coupled plasmas is the first reported in the literature.

Rej, Pramit; Ghoshal, Arijit, E-mail: aghoshal@math.buruniv.ac.in [Department of Mathematics, Burdwan University, Golapbag, Burdwan 713 104, West Bengal (India)

2014-09-15T23:59:59.000Z

375

The Retrocausal Nature of Quantum Measurement Revealed by Partial and Weak Measurements  

SciTech Connect (OSTI)

Quantum measurement is sometimes more effective when its result is not definite. Partial measurement turns the initial superposition not into a certain state but to a greater probability for it, enabling probing the quantum state in cases where complete measurement makes the noncommuting variables inaccessible. It also enables full quantum erasure that, unlike prevailing method, can be carried out even on recorded results. Aharonov's weak measurement is another method of imprecisely measuring quantum variables, outsmarting the uncertainty principle in even subtler ways. Happily, the two methods complement and corroborate one another in several interesting ways. We gedankenly apply these measurements to the EPR case. A pair of entangled particles undergoes more than one pair of partial and weak measurements, which, unlike complete measurements, leave them partially correlated. Their erasure is then shown to be as nonlocal as measurement itself. Surprisingly, the temporal relations between such measurements in the EPR setting do not follow the temporal sequence perceived by an external observer. For each particle, the measurements performed on the other operate as if they occurred (with signs reversed) in its own past, and in reversed order. This fully accords with Cramer's transactional interpretation and Aharonov's two state-vector formalism.

Elitzur, Avshalom C. [Iyar, Israeli Institute for Advanced Research, Rehovot (Israel); Cohen, Eliahu [School of Physics and Astronomy, Tel-Aviv University, Tel-Aviv 69978 (Israel)

2011-11-29T23:59:59.000Z

376

Discovery of a weak magnetic field in the photosphere of the single giant Pollux  

E-Print Network [OSTI]

Aims: We observe the nearby, weakly-active single giant, Pollux, in order to directly study and infer the nature of its magnetic field. Methods: We used the new generation spectropolarimeters ESPaDOnS and NARVAL to observe and detect circular polarization within the photospheric absorption lines of Pollux. Our observations span 18 months from 2007-2009. We treated the spectropolarimetric data using the Least-Squares Deconvolution method to create high signal-to-noise ratio mean Stokes V profiles. We also measured the classical activity indicator S-index for the Ca H&K lines, and the stellar radial velocity (RV). Results: We have unambiguously detected a weak Stokes V signal in the spectral lines of Pollux, and measured the related surface-averaged longitudinal magnetic field Bl. The longitudinal field averaged over the span of the observations is below one gauss. Our data suggest variations of the longitudinal magnetic field, but no significant variation of the S-index. We observe variations of RV which a...

Aurière, M; Konstantinova-Antova, R; Charbonnel, C; Catala, C; Weiss, W W; Roudier, T; Petit, P; Donati, J -F; Alecian, E; Cabanac, R; Van Eck, S; Folsom, C P; Power, J

2009-01-01T23:59:59.000Z

377

Intranight Optical Variability of Radio-Quiet Weak Emission Line Quasars-III  

E-Print Network [OSTI]

This is continuation of our programme to search for the elusive radio-quiet BL Lacs, by carrying out a systematic search for intranight optical variability (INOV) in a subset of `weak-line quasars' which are already designated as `high-confidence BL Lac candidate' and are also known to be radio-quiet. For 6 such radio-quiet weak-line quasars (RQWLQs), we present here new INOV observations taken in 11 sessions of duration >3 hours each. Combining these data with our previously published INOV monitoring of RQWLQs in 19 sessions yields INOV observations for a set of 15 RQWLQs monitored in 30 sessions, each lasting more than 3 hours. The 30 differential light curves, thus obtained for the 15 RQWLQs, were subjected to a statistical analysis using the F-test, and the deduced INOV characteristics of the RQWLQs then compared with those published recently for several prominent AGN classes, also applying the F-test. From our existing INOV observations, there is a hint that RQWLQs in our sample show a significantly high...

Kumar, Parveen; Chand, Hum

2015-01-01T23:59:59.000Z

378

Constraints on early dark energy from CMB lensing and weak lensing tomography  

SciTech Connect (OSTI)

Dark energy can be studied by its influence on the expansion of the Universe as well as on the growth history of the large-scale structure. In this paper, we follow the growth of the cosmic density field in early dark energy cosmologies by combining observations of the primary CMB temperature and polarisation power spectra at high redshift, of the CMB lensing deflection field at intermediate redshift and of weak cosmic shear at low redshifts for constraining the allowed amount of early dark energy. We present these forecasts using the Fisher matrix formalism and consider the combination of Planck data with the weak lensing survey of Euclid. We find that combining these data sets gives powerful constraints on early dark energy and is able to break degeneracies in the parameter set inherent to the various observational channels. The derived statistical 1{sigma}-bound on the early dark energy density parameter is {sigma}({Omega}{sup e}{sub d}) = 0.0022 which suggests that early dark energy models can be well examined in our approach. In addition, we derive the dark energy figure of merit for the considered dark energy parameterisation and comment on the applicability of the growth index to early dark energy cosmologies.

Hollenstein, Lukas; Crittenden, Robert [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX (United Kingdom)] [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Burnaby Road, Portsmouth PO1 3FX (United Kingdom); Sapone, Domenico [Departement de Physique Theorique, Universite de Geneve, 24 Quai Ernest-Ansermet, CH-1211 Geneve 4 (Switzerland)] [Departement de Physique Theorique, Universite de Geneve, 24 Quai Ernest-Ansermet, CH-1211 Geneve 4 (Switzerland); Schaefer, Bjoern Malte, E-mail: lukas.hollenstein@port.ac.uk, E-mail: domenico.sapone@unige.ch, E-mail: robert.crittenden@port.ac.uk, E-mail: spirou@ita.uni-heidelberg.de [Astronomisches Recheninstitut, Zentrum fuer Astronomie, Universitaet Heidelberg, Moenchhofstrasse 12, 69120 Heidelberg (Germany)

2009-04-15T23:59:59.000Z

379

Microscopic determinants of the weak-form efficiency of an artificial order-driven stock market  

E-Print Network [OSTI]

Stock markets are efficient in the weak form in the sense that no significant autocorrelations can be identified in the returns. However, the microscopic mechanisms are unclear. We aim at understanding the impacts of order flows on the weak-form efficiency through computational experiments based on an empirical order-driven model. Three possible determinants embedded in the model are investigated, including the tail heaviness of relative prices of the placed orders characterized by the tail index $\\alpha_x$, the degree of long memory in relative prices quantified by its Hurst index $H_x$, and the strength of long memory in order direction depicted by $H_x$. It is found that the degree of autocorrelations in returns (quantified by its Hurst index $H_r$) is negatively correlated with $\\alpha_x$ and $H_x$ and positively correlated with $H_s$. In addition, the values of $\\alpha_x$ and $H_x$ have negligible impacts on $H_r$, whereas $H_s$ exhibits a dominating impact on $H_r$. Our results suggest that stock market...

Zhou, Jian; Jiang, Zhi-Qiang; Xiong, Xiong; Zhang, Wei; Zhou, Wei-Xing

2014-01-01T23:59:59.000Z

380

The MOG Weak Field approximation II. Observational test of Chandra X-ray Clusters  

E-Print Network [OSTI]

We apply the weak field approximation limit of the covariant Scalar-Tensor-Vector Gravity (STVG) theory, so-called MOdified gravity (MOG), to the dynamics of clusters of galaxies by using only baryonic matter. The MOG effective gravitational potential in the weak field approximation is composed of an attractive Newtonian term and a repulsive Yukawa term with two parameters $\\alpha$ and $\\mu$. The numerical values of these parameters have been obtained by fitting the predicted rotation curves of galaxies to observational data, yielding the best fit result: $\\alpha = 8.89 \\pm 0.34$ and $\\mu= 0.042\\pm 0.004$ kpc$^{-1}$~\\cite{rah13}. We extend the observational test of this theory to clusters of galaxies, using data for the ionized gas and the temperature profile of nearby clusters obtained by the Chandra X-ray telescope. Using the MOG virial theorem for clusters, we compare the mass profiles of clusters from observation and theory for eleven clusters. The theoretical mass profiles for the inner parts of clusters exceed the observational data. However, the observational data for the inner parts of clusters (i.e., $r<0.1 r_{500}$) is scattered, but at distances larger than $\\sim 300$ kpc, the observed and predicted mass profiles converge. Our results indicate that MOG as a theory of modified gravity is compatible with the observational data from the the solar system to Mega parsec scales without invoking dark matter.

J. W. Moffat; S. Rahvar

2014-06-07T23:59:59.000Z

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381

New weakly-coupled forces hidden in low-energy QCD  

E-Print Network [OSTI]

Is it possible to detect a new weakly-coupled force at the QCD scale that interacts primarily with quarks? This work investigates experimental signatures of a new MeV - GeV gauge boson that couples to baryon number, with attention to the 100 MeV - GeV mass range that is the regime of nonperturbative QCD. Such a state can be searched for in rare radiative decays of light mesons ($\\eta, \\eta^\\prime, \\phi, \\omega$) as a $\\pi^0 \\gamma$ resonance, which is its leading decay mode from 140 - 620 MeV. This is a new discovery window for forces beyond the Standard Model that is not covered by existing dark photon searches.

Sean Tulin

2014-04-16T23:59:59.000Z

382

New weakly-coupled forces hidden in low-energy QCD  

E-Print Network [OSTI]

Is it possible to detect a new weakly-coupled force at the QCD scale that interacts primarily with quarks? This work investigates experimental signatures of a new MeV - GeV gauge boson that couples to baryon number, with attention to the 100 MeV - GeV mass range that is the regime of nonperturbative QCD. Such a state can be searched for in rare radiative decays of light mesons ($\\eta, \\eta^\\prime, \\phi, \\omega$) as a $\\pi^0 \\gamma$ resonance, which is its leading decay mode from 140 - 620 MeV. This is a new discovery window for forces beyond the Standard Model that is not covered by existing dark photon searches.

Tulin, Sean

2014-01-01T23:59:59.000Z

383

Weakly-Basic Anion Exchange Resin Scavenges Impurities in Ionic Liquid Synthesized from Trialkyloxonium Salt  

Science Journals Connector (OSTI)

The Lewis acidic parts of these impurities, that is, H+ and BF3, were demonstrated to be able to transfer to dimethylamino groups of the weakly basic anion exchange resin (DOWEX MARATHON WBA) in aqueous solutions, releasing 1-methylimidazole (mim). ... Although intense reddish brown color was given to the residual oil of [emim]BF4, further purification and decolorization have been achieved by using silica-gel column chromatography (eluent: acetone) and treatment with activated carbon in water. ... The detection and determination of [emim]+, mim, [Hmim]+, [BF3(mim)], and BF4– in the recovered oils and collected volatiles from each batch were performed by using chemical shifts and peak integrals in the 1H and 19F NMR spectra. ...

Koichiro Takao; Taro Tsubomura

2012-08-24T23:59:59.000Z

384

Spectral Singularities and CPA-Laser Action in a Weakly Nonlinear PT-Symmetric Bilayer Slab  

E-Print Network [OSTI]

We study optical spectral singularities of a weakly nonlinear PT-symmetric bilinear planar slab of optically active material. In particular, we derive the lasing threshold condition and calculate the laser output intensity. These reveal the following unexpected features of the system: 1. For the case that the real part of the refractive index $\\eta$ of the layers are equal to unity, the presence of the lossy layer decreases the threshold gain; 2. For the more commonly encountered situations when $\\eta-1$ is much larger than the magnitude of the imaginary part of the refractive index, the threshold gain coefficient is a function of $\\eta$ that has a local minimum. The latter is in sharp contrast to the threshold gain coefficient of a homogeneous slab of gain material which is a decreasing function of $\\eta$. We use these results to comment on the effect of nonlinearity on the prospects of using this system as a CPA-laser.

Ali Mostafazadeh

2014-04-07T23:59:59.000Z

385

Impact of Baryonic Processes on Weak Lensing Cosmology: Higher-Order Statistics and Parameter Bias  

E-Print Network [OSTI]

We study the impact of baryonic physics on cosmological parameter estimation with weak lensing surveys. We run a set of cosmological hydrodynamics simulations with different galaxy formation models. We then perform ray-tracing simulations through the total matter density field to generate 100 independent convergence maps of 25 deg$^2$ field-of-view, and use them to examine the ability of the following three lensing statistics as cosmological probes; power spectrum, peak counts, and Minkowski Functionals. For the upcoming wide-field observations such as Subaru Hyper Suprime-Cam (HSC) survey with a sky coverage of 1400 deg$^2$, the higher-order statistics provide tight constraints on the matter density, density fluctuation amplitude, and dark energy equation of state, but appreciable parameter bias is induced by the baryonic processes such as gas cooling and stellar feedback. When we use power spectrum, peak counts, and Minkowski Functionals, the relative bias in the dark energy equation of state parameter $w$ ...

Osato, Ken; Yoshida, Naoki

2015-01-01T23:59:59.000Z

386

Energy-band structure and intrinsic coherent properties in two weakly linked Bose-Einstein condensates  

SciTech Connect (OSTI)

The energy-band structure and energy splitting due to quantum tunneling in two weakly linked Bose-Einstein condensates were calculated by using the instanton method. The intrinsic coherent properties of Bose-Josephson junction (BJJ) were investigated in terms of energy splitting. For E{sub C}/E{sub J}<<1, the energy splitting is small and the system is globally phase coherent. In the opposite limit, E{sub C}/E{sub J}>>1, the energy splitting is large and the system becomes phase dissipated. Our results suggest that one should investigate the coherence phenomena of BJJ in proper condition such as E{sub C}/E{sub J}{approx}1.

Li, Wei-Dong; Liang, J.-Q. [Department of Physics and Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, (China); Zhang, Yunbo [Department of Physics and Institute of Theoretical Physics, Shanxi University, Taiyuan 030006, (China); Department of Physics, University of Turku, FIN-20014 Turun yliopisto, (Finland)

2003-06-01T23:59:59.000Z

387

Weak Values as Context Dependent Values of Observables and Born's Rule  

E-Print Network [OSTI]

We characterize a value of an observable by a `sum rule' for generally non-commuting observables and a `product rule' when restricted to a maximal commuting subalgebra of observables together with the requirement that the value is unity for the projection operator of the prepared state and the values are zero for the projection operators of the states which are orthogonal to the prepared state. The crucial requirement is that the expectation value and the variance of an observable should be independent of the way of measurement, i.e., the choice of the maximal commuting subalgebra of observables. We shall call the value a {\\it `contextual value'}. We show that the contextual value of an observable coincides with the weak value advocated by Aharonov and his colleagues by demanding the consistency of quantum mechanics with Kolmogorov's measure theory of probability. This also gives a derivation of Born's rule, which is one of the axioms of conventional quantum mechanics.

Akio Hosoya; Minoru Koga

2011-04-11T23:59:59.000Z

388

Bis(pentamethylcyclopentadienyl)ytterbium: An investigation of weak interactions in solution using multinuclear NMR spectroscopy  

SciTech Connect (OSTI)

NMR spectroscopy is ideal for studying weak interactions (formation enthalpy {le}20 kcal/mol) in solution. The metallocene bis(pentamethylcyclopentadienyl)ytterbium, Cp*{sub 2}Yb, is ideal for this purpose. cis-P{sub 2}PtH{sub 2}complexes (P = phosphine) were used to produce slow-exchange Cp*{sub 2}YbL adducts for NMR study. Reversible formation of (P{sub 2}PtH){sub 2} complexes from cis-P{sub 2}PtH{sub 2} complexes were also studied, followed by interactions of Cp*{sub 2}Yb with phosphines, R{sub 3}PX complexes. A NMR study was done on the interactions of Cp*{sub 2}Yb with H{sub 2}, CH{sub 4}, Xe, CO, silanes, stannanes, C{sub 6}H{sub 6}, and toluene.

Schwartz, D.J.

1995-07-01T23:59:59.000Z

389

Electron-electron interaction, weak localization and spin valve effect in vertical-transport graphene devices  

SciTech Connect (OSTI)

We fabricated a vertical structure device, in which graphene is sandwiched between two asymmetric ferromagnetic electrodes. The measurements of electron and spin transport were performed across the combined channels containing the vertical and horizontal components. The presence of electron-electron interaction (EEI) was found not only at low temperatures but also at moderate temperatures up to ?120?K, and EEI dominates over weak localization (WL) with and without applying magnetic fields perpendicular to the sample plane. Moreover, spin valve effect was observed when magnetic filed is swept at the direction parallel to the sample surface. We attribute the EEI and WL surviving at a relatively high temperature to the effective suppress of phonon scattering in the vertical device structure. The findings open a way for studying quantum correlation at relatively high temperature.

Long, Mingsheng; Gong, Youpin; Wei, Xiangfei; Zhu, Chao; Xu, Jianbao; Liu, Ping; Guo, Yufen; Li, Weiwei; Liu, Liwei, E-mail: lwliu2007@sinano.ac.cn [Key Laboratory of Nanodevices and Applications-CAS and Collaborative Innovation Center of Suzhou Nano Science and Technology, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences (CAS), Suzhou 215123 (China); Liu, Guangtong [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)

2014-04-14T23:59:59.000Z

390

Microscopic Description of Entanglements in Polyethylene Networks and Melts: Strong, Weak, Pairwise, and Collective Attributes  

E-Print Network [OSTI]

We present atomistic molecular dynamics simulations of two Polyethylene systems where all entanglements are trapped: a perfect network, and a melt with grafted chain ends. We examine microscopically at what level topological constraints can be considered as a collective entanglement effect, as in tube model theories, or as certain pairwise uncrossability interactions, as in slip-link models. A pairwise parameter, which varies between these limiting cases, shows that, for the systems studied, the character of the entanglement environment is more pairwise than collective. We employ a novel methodology, which analyzes entanglement constraints into a complete set of pairwise interactions, similar to slip links. Entanglement confinement is assembled by a plethora of links, with a spectrum of confinement strengths, from strong to weak. The strength of interactions is quantified through a link `persistence', which is the fraction of time for which the links are active. By weighting links according to their strength,...

Anogiannakis, Stefanos D; Theodorou, Doros N

2012-01-01T23:59:59.000Z

391

Periodic Hartree-Fock study of a weakly bonded layer structure: Brucite Mg(OH)2  

Science Journals Connector (OSTI)

The layered mineral brucite Mg(OH)2 is investigated theoretically using an ab initio all-electron linear combination of atomic orbitals Hartree-Fock (HF) approximation. At the HF level, the interlayer interaction is weak and the interlayer distance is larger than the experimental one. Bonding is discussed on the basis of density of states and charge-density maps. No hydrogen bond is characterized. A posteriori correction of the energy for the correlation error is performed by use of the functional approach. The three semilocal functional formulas used yield similar results. This brings in extra interlayer bonding interaction, and yields a calculated geometry in agreement with experiments. The analysis of the interlayer bondings shows that it is mainly of dispersion type, and that the used functionals account for dispersion, in particular at short interatomic distances.

Philippe D’Arco; Mauro Causà; Carla Roetti; Bernard Silvi

1993-02-15T23:59:59.000Z

392

Radio emission from weak spherical shocks in the outskirts of galaxy clusters  

E-Print Network [OSTI]

In Kang (2015) we calculated the acceleration of cosmic-ray electrons and the ensuing radio synchrotron emission at weak spherical shocks that are expected to form in the outskirts of galaxy clusters.There we demonstrated that, at decelerating spherical shocks, the volume integrated spectra of both electrons and radiation deviate significantly from the test-particle power-laws predicted for constant planar shocks, because the shock compression ratio and the flux of injected electrons decrease in time. In this study, we consider spherical blast waves propagating into a constant density core surrounded by an isothermal halo with a decreasing density profile in order to explore how the deceleration rate of the shock speed affects the radio emission from accelerated electrons. The surface brightness profile and the volume-integrated radio spectrum of the model shocks are calculated by assuming a ribbon-like shock surface on a spherical shell and the associated downstream region of relativistic electrons. If the p...

Kang, Hyesung

2015-01-01T23:59:59.000Z

393

The stability of weakly ionized collisional dusty plasma in the presence of flow  

SciTech Connect (OSTI)

The stability of weakly ionized and magnetized plasma in the presence of transverse (to the magnetic field) neutral wind is investigated in the present work. The collisional coupling of ambient background flow to the magnetized plasma gives rise to an electric field. In the presence of charged unmagnetized dust, electrostatic fluctuations in such plasma become unstable, with the growth rate dependent on the plasma thermal speed as well as on the dust charge and collision frequencies. This instability is similar to the Farley-Buneman instability. However, unlike Farley-Buneman, where the growth rate is directly dependent on the background flow, this dependence in the present case is only indirect. It is shown that this instability can grow over few seconds in the Earth's lower ionosphere and thus could play an important role in the structure formation.

Pandey, B. P. [Department of Physics, Astronomy and Research Centre for Astronomy, Astrophysics and Astrophotonics, Macquarie University, Sydney, NSW 2109 (Australia); Vranjes, J. [Von Karman Institute, Waterloosesteenweg 72, 1640 Sint-Genesius-Rode, Brussels (Belgium); Vladimirov, S. V. [School of Physics, University of Sydney, NSW 2006 (Australia); Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow 125412 (Russian Federation)

2012-09-15T23:59:59.000Z

394

Baryon masses in the three-state Potts field theory in a weak magnetic field  

E-Print Network [OSTI]

The 3-state Potts field theory describes the scaling limit of the 3-state Potts model on the two-dimensional lattice near its continuous phase transition point. In the presence of thermal and magnetic field perturbations, the 3-state Potts field theory in the ordered phase exhibits confinement of kinks, which allows both mesons and baryons. We calculate the masses of light baryons in this model in the weak confinement regime in leading order of the small magnetic field. In leading order of perturbation theory, the light baryons can be viewed as bound states of three quantum particles - the kinks, which move on a line and interact via a linear potential. We determine the masses of the lightest baryons by numerical solution of the associated non-relativistic one-dimensional quantum three-body problem.

S. B. Rutkevich

2014-08-08T23:59:59.000Z

395

A step towards testing general relativity using weak gravitational lensing and redshift surveys  

E-Print Network [OSTI]

Using the linear theory of perturbations in General Relativity, we express a set of consistency relations that can be observationally tested with current and future large scale structure surveys. We then outline a stringent model-independent program to test gravity on cosmological scales. We illustrate the feasibility of such a program by jointly using several observables like peculiar velocities, galaxy clustering and weak gravitational lensing. After addressing possible observational or astrophysical caveats like galaxy bias and redshift uncertainties, we forecast in particular how well one can predict the lensing signal from a cosmic shear survey using an over-lapping galaxy survey. We finally discuss the specific physics probed this way and illustrate how $f(R)$ gravity models would fail such a test.

Yong-Seon Song; Olivier Doré

2008-12-01T23:59:59.000Z

396

The UK landfill tax and the landfill tax credit scheme: operational weaknesses  

Science Journals Connector (OSTI)

The UK Landfill Tax and the related Landfill Tax Credit Scheme have now been in operation since October 1996. There have been a number of reviews to assess its operation and effectiveness that have led to some minor amendments. However, there continue to be concerns about operational weaknesses of the tax and the credit scheme. In particular, there is the risk that the tax may be evaded and there are fears that a lack of transparency and independence may undermine the fundamental principles of the Landfill Tax Credit Scheme. Following a recent report, the Secretary of State for the Department of the Environment, Transport and the Regions has set up an inquiry. This paper looks at some of the specific concerns that have been raised and the implications for waste management.

John R. Morris; Adam D. Read

2001-01-01T23:59:59.000Z

397

Weak equivalence principle for self-gravitating bodies: A sieve for purely metric theories of gravity  

E-Print Network [OSTI]

We propose the almost-geodesic motion of self-gravitating test bodies as a possible selection rule among metric theories of gravity. Starting from a heuristic statement, the "gravitational weak equivalence principle", we build a formal, operative test able to probe the validity of the principle for any metric theory of gravity, in an arbitrary number of spacetime dimensions. We show that, if the theory admits a well-posed variational formulation, this test singles out only the purely metric theories of gravity. This conclusion reproduces known results in the cases of general relativity (also with a cosmological constant term), and scalar-tensor theories, but extends also to debated or unknown scenarios, such as f(R) and Lanczos-Lovelock theories. We thus provide new tools going beyond the standard methods, where the latter turn out to be inconclusive or inapplicable.

Eolo Di Casola; Stefano Liberati; Sebastiano Sonego

2014-04-11T23:59:59.000Z

398

Constraints on warm dark matter from weak lensing in anomalous quadruple lenses  

E-Print Network [OSTI]

We investigate the weak lensing effect by line-of-sight structures with a surface mass density of solar mass/arcsec^2 in QSO-galaxy quadruple lens systems. Using high-resolution N-body simulations in warm dark matter (WDM) models and observed four quadruple lenses that show anomalies in the flux ratios, we obtain constraints on the mass of thermal WDM, m_WDM>= 1.3keV(95%CL), which is consistent with those from Lyman-$\\alpha$ forests and the number counts of high-redshift galaxies at z>4. Our results show that WDM with a free-streaming comoving wavenumber k_{fs} <= 27 h/Mpc is disfavored as the major component of cosmological density at redshifts 0.5 <~ z <~ 4.

Kaiki Taro Inoue; Ryuichi Takahashi; Tomo Takahashi; Tomoaki Ishiyama

2014-09-04T23:59:59.000Z

399

Electromagnetic and neutral-weak response functions of 4He and 12C  

E-Print Network [OSTI]

Ab initio calculations of the quasi-elastic electromagnetic and neutral-weak response functions of 4He and 12C are carried out for the first time. They are based on a realistic approach to nuclear dynamics, in which the strong interactions are described by two- and three-nucleon potentials and the electroweak interactions with external fields include one- and two-body terms. The Green's function Monte Carlo method is used to calculate directly the Laplace transforms of the response functions, and maximum-entropy techniques are employed to invert the resulting imaginary-time correlation functions with associated statistical errors. The theoretical results, confirmed by experiment in the electromagnetic case, show that two-body currents generate excess transverse strength from threshold to the quasi-elastic to the dip region and beyond. These findings challenge the conventional picture of quasi-elastic inclusive scattering as being largely dominated by single-nucleon knockout processes.

Lovato, A; Carlson, J; Pieper, Steven C; Schiavilla, R

2015-01-01T23:59:59.000Z

400

Electron density and temperature measurement by continuum radiation emitted from weakly ionized atmospheric pressure plasmas  

SciTech Connect (OSTI)

The electron-atom neutral bremsstrahlung continuum radiation emitted from weakly ionized plasmas is investigated for electron density and temperature diagnostics. The continuum spectrum in 450–1000?nm emitted from the argon atmospheric pressure plasma is found to be in excellent agreement with the neutral bremsstrahlung formula with the electron-atom momentum transfer cross-section given by Popovi?. In 280–450?nm, however, a large discrepancy between the measured and the neutral bremsstrahlung emissivities is observed. We find that without accounting for the radiative H{sub 2} dissociation continuum, the temperature, and density measurements would be largely wrong, so that it should be taken into account for accurate measurement.

Park, Sanghoo; Choe, Wonho, E-mail: wchoe@kaist.ac.kr [Department of Physics, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Youn Moon, Se [High-enthalpy Plasma Research Center, Chonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju 561-756 (Korea, Republic of); Park, Jaeyoung [5771 La Jolla Corona Drive, La Jolla, CA 92037 (United States)

2014-02-24T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Absence of Right-Handed Neutrino in Weak Interactions: Explanation via Nonlinear Electroweak Model  

E-Print Network [OSTI]

The nonlinear SU(2) electroweak model is used to explain the absence of the right-handed neutrino in weak interactions. Two covariant eigenvalue constraints which affect the transformation lead to two classes of right-handed leptons, and make possible invariant mass terms without the Higgs doublet. A covariant picture of neutrinos with mass is presented. A new invariant form for the boson potentials is described in which the boson mass terms arises via the adjoint field. This model also indicates a different region of matter involving coupled leptons that are "blind" to the massless electromagnetic field but "see" four massive potentials that are themselves blind to the electromagnetic field. We argue that these more difficult to detect "dark" fields provide a possible contribution to the missing mass.

Bill Dalton

2010-06-21T23:59:59.000Z

402

Measuring the Fr Weak Nuclear Charge by Observing a Linear Stark Shift with Small Atomic Samples  

Science Journals Connector (OSTI)

We study the chirality of ground-state alkali atoms in E and B fields, dressed with a circularly-polarized beam near-detuned (?1??GHz) from an E-field-assisted forbidden transition such as 7S-8S in Fr. We predict parity violating energy shifts of their sublevels, linear in E and the weak nuclear charge QW. A dressing beam of 10??kW/cm2 at 506 nm produces a shift of ?100???Hz at E=100??V/cm, B?50??mG which should be observable with ?104 Fr atoms confined in an optical dipole trap. We discuss optimal conditions, parameter reversals, and a calibration procedure to measure QW.

Marie-Anne Bouchiat

2008-03-25T23:59:59.000Z

403

Theory and Modeling of Weakly Bound/Physisorbed Materials for Hydrogen Storage  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

and Modeling of and Modeling of Weakly Bound/Physisorbed Materials for Hydrogen Storage Andrew Williamson Quantum Simulations Group Lawrence Livermore National Laboratory Tadashi Ogitsu Lawrence Livermore National Laboratory Yong-Hyun Kim, Mike Heben, and Shengbai Zhang National Renewable Energy Laboratory UCRL-209054 This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under contract No. W-7405-Eng-48. Outline * Storage by physisorption: - CNT, fullerenes, carbon aerogels - Doping, Decorating, Charging * Accuracy of Methods: DFT, QMC and Quantum Chemistry - Van der Waals interactions - * Use of DFT to screen for new compounds - 2 binding to doped fullerenes * LDA, GGA and ad-hoc corrections to pseudopotentials

404

Breakdown of the Equivalence between Energy Content and Weight in a Weak Gravitational Field for a Quantum Body  

E-Print Network [OSTI]

It is shown that weight operator of a composite quantum body in a weak external gravitational field in the post-Newtonian approximation of the General Relativity does not commute with its energy operator, taken in the absence of the field. Nevertheless, the weak equivalence between the expectations values of weight and energy is shown to survive at a macroscopic level for stationary quantum states for the simplest composite quantum body - a hydrogen atom. Breakdown of the weak equivalence between weight and energy at a microscopic level for stationary quantum states can be experimentally detected by studying unusual electromagnetic radiation, emitted by the atoms, supported and moved in the Earth gravitational field with constant velocity, using spacecraft or satellite. For superpositions of stationary quantum states, a breakdown of the above mentioned equivalence at a macroscopic level leads to time dependent oscillations of the expectation values of weight, where the equivalence restores after averaging over time procedure.

Andrei Lebed

2012-05-14T23:59:59.000Z

405

Interfacial roughening in non-ideal fluids: Dynamic scaling in the weak- and strong-damping regime  

E-Print Network [OSTI]

Interfacial roughening denotes the nonequilibrium process by which an initially flat interface reaches its equilibrium state, characterized by the presence of thermally excited capillary waves. Roughening of fluid interfaces has been first analyzed by Flekkoy and Rothman [Phys. Rev. Lett. 75, 260 (1995)], where the dynamic scaling exponents in the weakly damped case in two dimensions were found to agree with the Kardar-Parisi-Zhang universality class. We extend this work by taking into account also the strong-damping regime and perform extensive fluctuating hydrodynamics simulations in two dimensions using the Lattice Boltzmann method. We show that the dynamic scaling behavior is different in the weakly and strongly damped case.

Markus Gross; Fathollah Varnik

2013-01-18T23:59:59.000Z

406

Interfacial roughening in non-ideal fluids: Dynamic scaling in the weak- and strong-damping regime  

E-Print Network [OSTI]

Interfacial roughening denotes the nonequilibrium process by which an initially flat interface reaches its equilibrium state, characterized by the presence of thermally excited capillary waves. Roughening of fluid interfaces has been first analyzed by Flekkoy and Rothman [Phys. Rev. Lett. 75, 260 (1995)], where the dynamic scaling exponents in the weakly damped case in two dimensions were found to agree with the Kardar-Parisi-Zhang universality class. We extend this work by taking into account also the strong-damping regime and perform extensive fluctuating hydrodynamics simulations in two dimensions using the Lattice Boltzmann method. We find that the dynamic scaling behavior is different in the weakly and strongly damped case.

Gross, Markus

2013-01-01T23:59:59.000Z

407

Case 16-1996 — A 36-year-old woman with bilateral facial and hand weakness and impaired truncal sensation  

Science Journals Connector (OSTI)

...component, which I shall address later. The prominent wasting of the hands should suggest amyotrophic lateral sclerosis. The severity of the sensory loss in the upper trunk, however, as evidenced by the patient's unawareness of a second-degree burn on her shoulder, rules out that diagnosis. The second... Presentation of Case A 36-year-old left-handed woman was admitted to the hospital because of progressive, bilateral hand weakness and numbness, bilateral facial weakness, and loss of truncal sensation. She had been well until five years earlier, when she ...

Siao P.T.C.Cros D.P.Lees R.S.

1996-05-23T23:59:59.000Z

408

OPEC Production Likely To Remain Low  

Gasoline and Diesel Fuel Update (EIA)

4 4 Notes: With a background of some weakening demand from weakening economies (being pushed lower by high crude oil prices), OPEC has shown not only a a reluctance to increase production any time soon, but has actually decreased production. OPEC has attempted to reduce production by 3.5 million barrels per day so far this year. The last of these cuts is not to occur until September, which will affect consuming countries the most over the upcoming winter. Tightness in both European (Brent price) and Asian (Dubai price) markets are reflected in the recent strength seen in the marker crude oil for these regions. But with the effect of the 2nd OPEC production cuts just taking effect and the effect of the 3rd production cut yet to come, U.S. crude oil stocks are

409

Accounting for Remaining Injected Fracturing Fluid  

E-Print Network [OSTI]

The technology of multi-stage fracturing of horizontal wells made the development of shale gas reservoirs become greatly successful during the past decades. A large amount of fracturing fluid, usually from 53,000 bbls to 81,400 bbls, is injected...

Zhang, Yannan

2013-12-06T23:59:59.000Z

410

Recent Moa Remains in New Zealand  

Science Journals Connector (OSTI)

... and to form deep tranverse folds, especially towards the upper part. The surface is roughened by elevated conical papillae, from the apex of some of which springs a slender ...

JAMES HECTOR

1871-07-20T23:59:59.000Z

411

Geothermal developers remain optimistic | Department of Energy  

Office of Environmental Management (EM)

"As it takes relatively longer to develop geothermal power capacity compared to wind or solar installations, many projects in development today won't generate electricity until...

412

INTRODUCTION CARDIOVASCULAR DISEASE remains the leading cause  

E-Print Network [OSTI]

materials such as Dacron (polyethylene terephthalate) and expanded poly- tetrafluorotethylene (e(diol citrate), a novel class of biodegradable polyester elastomer. Scaffolds were characterized for tensile

Yang, Jian

413

Understanding Apomixis: Recent Advances and Remaining Conundrums  

Science Journals Connector (OSTI)

...Commonwealth Scientific and Industrial Research Organization, Plant...each progeny plant and an assessment of ploidy in all individuals...Maize and Wheat Improvement Center, Institut de Recherche pour...sexual crops: A critical assessment of the apomixis technology...

Ross A. Bicknell; Anna M. Koltunow

2004-05-06T23:59:59.000Z

414

Understanding Apomixis: Recent Advances and Remaining Conundrums  

Science Journals Connector (OSTI)

...how this occurs and its impact on seed quality is particularly relevant for the installation...might have on seed yield, viability, and quality for a given plant. EXPERIMENTAL APPROACHES...fronts before we can hope to successfully engineer a controlled, commercially viable form...

Ross A. Bicknell; Anna M. Koltunow

2004-05-06T23:59:59.000Z

415

Understanding Apomixis: Recent Advances and Remaining Conundrums  

Science Journals Connector (OSTI)

...the inherited genetic load. Similarly, we recently...increases its genetic load and limits the viability...to the role of genetic load, this effect can be expected...it markedly reduces the power of the approach. Fine...refine the basic mapping data. It also should be remembered...

Ross A. Bicknell; Anna M. Koltunow

2004-05-06T23:59:59.000Z

416

Fish Oil Supplement Research Remains Murky  

Science Journals Connector (OSTI)

... If you've been following the media trail on fish oil lately, you've probably been tempted to forgo the smelly capsules. A systematic ... , The Journal of the American Medical Association, reported that neither eating extra helpings of fish nor taking ...

Melinda Wenner Moyer

2012-09-25T23:59:59.000Z

417

Universality of weakly bound dimers and Efimov trimers close to Li-Cs Feshbach resonances  

E-Print Network [OSTI]

We study the interspecies scattering properties of ultracold Li-Cs mixtures in their two energetically lowest spin channels in the magnetic field range between 800 G and 1000 G. Close to two broad Feshbach resonances we create weakly bound LiCs dimers by radio-frequency association and measure the dependence of the binding energy on the external magnetic field strength. Based on the binding energies and complementary atom loss spectroscopy of three other Li-Cs s-wave Feshbach resonances we construct precise molecular singlet and triplet electronic ground state potentials using a coupled-channels calculation. We extract the Li-Cs interspecies scattering length as a function of the external field and obtain almost a ten-fold improvement in the precision of the values for the pole positions and widths of the s-wave Li-Cs Feshbach resonances as compared to our previous work [Pires \\textit{et al.}, Phys. Rev. Lett. \\textbf{112}, 250404 (2014)]. We discuss implications on the Efimov scenario and the universal geome...

Ulmanis, J; Pires, R; Kuhnle, E D; Weidemüller, M; Tiemann, E

2015-01-01T23:59:59.000Z

418

New physics in the weak interaction of $\\bar B\\to D^{(*)}?\\bar?$  

E-Print Network [OSTI]

Recent experimental results on exclusive semi-tauonic B meson decays, B -> D(*) tau nu, showing sizable deviations from the standard model prediction, suggest a new physics in which the structure of the relevant weak charged interaction may differ from that of the standard model. We study the exclusive semi-tauonic B decays in a model-independent manner using the most general set of four-Fermi interactions in order to clarify possible structures of the charged current in new physics. It turns out that correlations among observables including tau and D* polarizations and q^2 distributions are useful to distinguish possible new physics operators. Further, we investigate some interesting models to exhibit the advantage of our model-independent analysis. As a result, we find that two Higgs doublet models without tree-level FCNC and the minimal supersymmetric standard model with R-parity violation are unlikely to explain the present experimental data, while two Higgs doublet models with FCNC and a leptoquark model are consistent with the data.

Minoru Tanaka; Ryoutaro Watanabe

2012-12-09T23:59:59.000Z

419

Decay of a weak shock followed by a tail of arbitrary waveform  

Science Journals Connector (OSTI)

Weak?shock theory is used to find the decay of a shock that is propagating into a quiet fluid. The tail or flow field behind the shock is assumed to be smooth but otherwise arbitrary. Let the time wave?form of the pressure at the initial measurement point be given by p = P 0 g(t) where P 0 is the initial pressure amplitude and g(t) is the arbitrary tail function normalized so that g(0) = 1. For plane waves the dependence of the shock amplitude P on distance x is found from the following coupled equations: Ax?=?[g(? b )] ?2 ? ? 0 ? b ?g(?)d? and P = P 0 g(? b ) where A is a constant and ? b is the time?like parameter (for the shock) from the Earnshaw solution. For example if G = exp(?at) (an exponential tail) the coupled equations yield P?=?(P 0 /Ax)[(2Ax?+?1) ?1/2 ?+?1] in agreement with P. H. Rogers' result [J. Acoust. Soc. Am. 62 1412–1419 (1977)]. Solutions have also been obtained for the model tail functions described by J. W. Reed [J. Acoust. Soc. Am. 61 39–49 (1977)]. For spherical waves replace x by r 0 ln(r/r 0) where r is radial distance and r 0 is the initial measurement distance. [Work supported by ONR and AFOSR.

David T. Blackstock

1978-01-01T23:59:59.000Z

420

A weak acceleration effect due to residual gravity in a multiply connected universe  

E-Print Network [OSTI]

Could cosmic topology imply dark energy? We use a weak field (Newtonian) approximation of gravity and consider the gravitational effect from distant, multiple copies of a large, collapsed (virialised) object today (i.e. a massive galaxy cluster), taking into account the finite propagation speed of gravity, in a flat, multiply connected universe, and assume that due to a prior epoch of fast expansion (e.g. inflation), the gravitational effect of the distant copies is felt locally, from beyond the naively calculated horizon. We find that for a universe with a $T^1xR^2$ spatial section, the residual Newtonian gravitational force (to first order) provides an anisotropic effect that repels test particles from the cluster in the compact direction, in a way algebraically similar to that of dark energy. For a typical test object at comoving distance $\\chi$ from the nearest dense nodes of the cosmic web of density perturbations, the pressure-to-density ratio $w$ of the equation of state in an FLRW universe, is w \\sim - (\\chi/L)^3, where $L$ is the size of the fundamental domain, i.e. of the universe. Clearly, |w|dark energy, but the amplitude of the effect at the present epoch is too small to explain the observed dark energy density and its anisotropy makes it an unrealistic candidate for the observed dark energy.

Boudewijn F. Roukema; Stanislaw Bajtlik; Marek Biesiada; Agnieszka Szaniewska; Helena Jurkiewicz

2006-12-08T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

A dimension-breaking phenomenon for water waves with weak surface tension  

E-Print Network [OSTI]

It is well known that the water-wave problem with weak surface tension has small-amplitude line solitary-wave solutions which to leading order are described by the nonlinear Schr\\"odinger equation. The present paper contains an existence theory for three-dimensional periodically modulated solitary-wave solutions which have a solitary-wave profile in the direction of propagation and are periodic in the transverse direction; they emanate from the line solitary waves in a dimension-breaking bifurcation. In addition, it is shown that the line solitary waves are linearly unstable to long-wavelength transverse perturbations. The key to these results is a formulation of the water wave problem as an evolutionary system in which the transverse horizontal variable plays the role of time, a careful study of the purely imaginary spectrum of the operator obtained by linearising the evolutionary system at a line solitary wave, and an application of an infinite-dimensional version of the classical Lyapunov centre theorem.

Mark D. Groves; Shu-Ming Sun; Erik Wahlén

2014-11-10T23:59:59.000Z

422

Stochastic Biasing and Galaxy-Mass Density Relation in the Weakly Non-linear Regime  

E-Print Network [OSTI]

It is believed that the biasing of the galaxies plays an important role for understanding the large-scale structure of the universe. In general, the biasing of galaxy formation could be stochastic. Furthermore, the future galaxy survey might allow us to explore the time evolution of the galaxy distribution. In this paper, the analytic study of the galaxy-mass density relation and its time evolution is presented within the framework of the stochastic biasing. In the weakly non-linear regime, we derive a general formula for the galaxy-mass density relation as a conditional mean using the Edgeworth expansion. The resulting expression contains the joint moments of the total mass and galaxy distributions. Using the perturbation theory, we investigate the time evolution of the joint moments and examine the influence of the initial stochasticity on the galaxy-mass density relation. The analysis shows that the galaxy-mass density relation could be well-approximated by the linear relation. Compared with the skewness of the galaxy distribution, we find that the estimation of the higher order moments using the conditional mean could be affected by the stochasticity. Therefore, the galaxy-mass density relation as a conditional mean should be used with a caution as a tool for estimating the skewness and the kurtosis.

A. Taruya; J. Soda

1998-09-16T23:59:59.000Z

423

High-Frequency Resonance of A Weak Ferromagnet: MnCO3  

Science Journals Connector (OSTI)

The high-frequency resonance of MnCO3 in the canted state was found at 95.7 Gc/sec in zero field at 20.4°K which corresponds to a uniaxial anisotropy energy of 31.4×10-3 cm-1. The frequency dependence of the resonance for magnetic fields parallel to the [111] direction and the angular dependence of the resonance for constant frequency were measured. The latter was found to be different from that of a pure antiferromagnet due to the anisotropic spin-spin interaction. At absolute zero we estimated the zero-field splitting to occur at approximately 132 Gc/sec. When the magnetic field was applied in the (111) plane, the resonance could not be observed due to broadening effects. The broadening effects were also large in magnetic fields smaller than 7 kG. MnCO3 is the first weak ferromagnet with anisotropic spin-spin interaction where the high-frequency branch has been found.

H. J. Fink and D. Shaltiel

1963-04-15T23:59:59.000Z

424

Detection of Weakly Conserved Ancestral Mammalian RegulatorySequences by Primate Comparisons  

SciTech Connect (OSTI)

Genomic comparisons between human and distant, non-primatemammals are commonly used to identify cis-regulatory elements based onconstrained sequence evolution. However, these methods fail to detectcryptic functional elements, which are too weakly conserved among mammalsto distinguish from nonfunctional DNA. To address this problem, weexplored the potential of deep intra-primate sequence comparisons. Wesequenced the orthologs of 558 kb of human genomic sequence, coveringmultiple loci involved in cholesterol homeostasis, in 6 nonhumanprimates. Our analysis identified 6 noncoding DNA elements displayingsignificant conservation among primates, but undetectable in more distantcomparisons. In vitro and in vivo tests revealed that at least three ofthese 6 elements have regulatory function. Notably, the mouse orthologsof these three functional human sequences had regulatory activity despitetheir lack of significant sequence conservation, indicating that they arecryptic ancestral cis-regulatory elements. These regulatory elementscould still be detected in a smaller set of three primate speciesincluding human, rhesus and marmoset. Since the human and rhesus genomesequences are already available, and the marmoset genome is activelybeing sequenced, the primate-specific conservation analysis describedhere can be applied in the near future on a whole-genome scale, tocomplement the annotation provided by more distant speciescomparisons.

Wang, Qian-fei; Prabhakar, Shyam; Chanan, Sumita; Cheng,Jan-Fang; Rubin, Edward M.; Boffelli, Dario

2006-06-01T23:59:59.000Z

425

Analysis of the strengths and weaknesses of acid rain electronic data reports  

SciTech Connect (OSTI)

Entergy Corporation is a Phase II utility with a fossil generation base composed primarily of natural gas and low sulfur coal. This paper presents an analysis of a large Phase II utility`s continuous emissions monitoring data reported to EPA under Title IV Acid Rain. Electric utilities currently report hourly emissions of NO{sub x}, SO{sub 2}, CO{sub 2}, fuel use, and generation through electronic data reports to EPA. This paper describes strengths and weaknesses of the data reported to EPA as determined through an analysis of 1995 data. Emissions reported by this company under acid rain for SO{sub 2} and NO{sub x} are very different from emissions reported to state agencies for annual emission inventory purposes in past years and will represent a significant break with historic trends. A comparison of emissions has been made of 1995 emissions reported under Electronic Data Reports to the emissions that would have been reported using emission factors and fuel data in past years. In addition, the paper examines the impacts of 40 CFR Part 75 Acid Rain requirements such as missing data substitution and monitor bias adjustments. Measurement system errors including stack flow measurement and false NO{sub x}Lb/MMBtu readings at very low loads are discussed. This paper describes the implications for public policy, compliance, emissions inventories, and business decisions of Part 75 acid rain monitoring and reporting requirements.

Schott, J. [Entergy Corp., Beaumont, TX (United States)

1997-12-31T23:59:59.000Z

426

Environmental, seasonal, and social modulations of basal activity in a weakly electric fish  

Science Journals Connector (OSTI)

The electric organ discharge (EOD) of weakly electric fish encodes information about species, sex, behavioral, and physiological states throughout the lifetime. Its central command is crucial for sensory-motor coordination, and is therefore the target of plastic mechanisms that adapt fish to environmental and social challenges. The EOD waveform of Brachyhypopomus pinnicaudatus is modulated by environmental factors and the neuroendocrine system. In this study we investigate the effects of water temperature and day–night cycle upon EOD rate in this species during the breeding and non-breeding seasons. During the non-breeding season, EOD rate is a linear function of water temperature and exhibits counterclockwise hysteresis. During breeding, a thermal resistance strategy prevents the decrease of EOD rate to cooling. A nocturnal increase of EOD basal rate independent of water temperature and locomotor activity was demonstrated in isolated non-breeding adults and in male–female dyads all year round. An additional increase of nocturnal EOD rate, probably acting as a social courtship signal, was found in breeding dyads. This additional increase of nocturnal EOD rate could not be fully explained by gonadal maturation and was modulated by social stimuli. This study provides novel data on the complex interactions between environment, reproductive cycle, social behavior, and electromotor output in an advantageous model of the vertebrate central nervous system.

Ana Silva; Rossana Perrone; Omar Macadar

2007-01-01T23:59:59.000Z

427

Green-Kubo formula for weakly coupled system with dynamical noise  

E-Print Network [OSTI]

We study the Green-Kubo (GK) formula $\\kappa (\\varepsilon, \\xi)$ for the heat conductivity of an infinite chain of $d$-dimensional finite systems (cells) coupled by a smooth nearest neighbour potential $\\varepsilon V$. The uncoupled systems evolve according to Hamiltonian dynamics perturbed stochastically by an energy conserving noise of strength $\\xi$. Noting that $\\kappa (\\varepsilon, \\xi)$ exists and is finite whenever $\\xi> 0$, we are interested in what happens when the strength of the noise $\\xi \\to 0$. For this, we start in this work by formally expanding $\\kappa (\\varepsilon, \\xi)$ in a power series in $\\varepsilon$, $\\kappa (\\varepsilon, \\xi) = \\varepsilon^2 \\sum_{n\\ge 2} \\varepsilon^{n-2} \\kappa_n (\\xi)$ and investigating the (formal) equations satisfied by $\\kappa_n (\\xi$. We show in particular that $\\kappa_2 (\\xi)$ is well defined when no pinning potential is present, and coincides formally with the heat conductivity obtained in the weak coupling (van Hove) limit, where time is rescaled as $\\varepsilon^{-2}t$, for the cases where the latter has been established \\cite{LO, DL}. For one-dimensional systems, we investigate $\\kappa_2 (\\xi)$ as $\\xi\\to 0$ in three cases: the disordered harmonic chain, the rotor chain and a chain of strongly anharmonic oscillators. Moreover, we formally identify $\\kappa_2 (\\xi)$ with the conductivity obtained by having the chain between two reservoirs at temperature $T$ and $T+\\delta T$, in the limit $\\delta T\\to 0$, $N \\to \\infty$, $\\varepsilon \\to 0$.

Cedric Bernardin; Francois Huveneers; Joel L. Lebowitz; Carlangelo Liverani; Stefano Olla

2014-07-15T23:59:59.000Z

428

World petrochemical outlook: Is the current weakness a trend or an aberration?  

SciTech Connect (OSTI)

While the focus of this conference is methanol, a review of the general petrochemical industry might be enlightening and valuable to understanding the methanol market. Methanol is certainly a commodity with similarities to hydrocarbons such as gasoline and similarities to base petrochemicals such as ethylene. Methanol stands with one foot in the fuels market via MTBE and the other in the chemicals business for acetic acid and formaldehyde, among many others. Is the world petrochemical market moving into a new trend of weak prices and profits or is the strong growth seen in 1994 and 1995 continuing and the current situation an aberration? In order to determine whether the current market is a trend or aberration, the author looks at issues that he believes caused the current situation and then considers where the world`s economies and petrochemical markets are heading. The issues discussed are: unusually high price increase in a short period; inventory increase/decrease because of price changes; reduction in demand caused by high prices; increase in capacity caused by high prices; changes in growth of world economies; and political/economic issues in China.

Baggett, P.E. [CMAI, Houston, TX (United States)

1995-12-31T23:59:59.000Z

429

Study of single-pion production by weak charged currents in low-energy ?d interactions  

Science Journals Connector (OSTI)

This paper gives the results of a study of single-pion production by the weak charged current utilizing the wide-band muon-type-neutrino beam at the Argonne Zero Gradient Synchrotron. The data were obtained from hydrogen and deuterium fillings of the 12-ft bubble chamber. The methods of event selection and separation from background are given as are the details of the corrections and systematic effects in the data sample. The energy-dependent cross sections and differential distributions are presented for the three single-pion production reactions ?p??-p?+, ?n??-p?0, and ?n??-n?+. An isospin decomposition shows that the ratio of I=12 to I=32 amplitudes is 0.68±0.04 with a relative phase of (90.7±4.6)° for M(N?)<1.4 GeV. This agrees with theoretical models, particularly the detailed calculation of Adler. Using the data of the reaction ?p??-p?+, the characteristic mass of the nucleon axial-vector elastic form factor is measured to be 0.98-0.03+0.06 GeV when analyzed within the context of the Adler model. The data are also compared to other parametrizations of the nucleon axial-vector form factor.

G. M. Radecky; V. E. Barnes; D. D. Carmony; A. F. Garfinkel; M. Derrick; E. Fernandez; L. Hyman; G. Levman; D. Koetke; B. Musgrave; P. Schreiner; R. Singer; A. Snyder; S. Toaff; S. J. Barish; A. Engler; R. W. Kraemer; K. Miller; B. J. Stacey; R. Ammar; D. Coppage; D. Day; R. Davis; N. Kwak; R. Stump

1982-03-01T23:59:59.000Z

430

Thermodynamics of large-$N$ gauge theories on a sphere: weak versus strong coupling  

E-Print Network [OSTI]

Recently lattice simulation in pure Yang-Mills theory has exhibited significant quadratic corrections for both the thermodynamic quantities and the renormalized Polyakov loop in the deconfined phase. These terms are previously found to appear naturally for ${\\mathcal N}=4$ Super Yang-Mills (SYM) on a sphere at strong coupling, through the gauge/string duality. Here we extend the investigation to the weak coupling regime, and for general large-$N$ gauge theories. Employing the matrix model description, we find some novel behavior in the deconfined phase, which is not noticed in the literature. Due to the non-uniform distribution of the eigenvalues, the deviation of the Polyakov loop from unity starts from $1/T^3$ instead of $1/T^2$. Such a power is fixed by the space dimension and do not change with the coupling. This type of deviation further induces odd temperature powers in the free energy, together with logarithmic factors. These are quite different from the strong-coupled ${\\mathcal N}=4$ SYM and the latt...

Zuo, Fen

2014-01-01T23:59:59.000Z

431

Importance of Compton scattering for radiation spectra of isolated neutron stars with weak magnetic fields  

E-Print Network [OSTI]

Emergent model spectra of neutron star atmospheres are widely used to fit the observed soft X-ray spectra of different types of isolated neutron stars. We investigate the effect of Compton scattering on the emergent spectra of hot (T_eff > 10^6 K) isolated neutron stars with weak magnetic fields. In order to compute model atmospheres in hydrostatic and radiative equilibrium we solve the radiation transfer equation with the Kompaneets operator. We calculate a set of models with effective temperatures in the range 1 - 5 * 10^6 K, with two values of surface gravity (log g = 13.9 and 14.3) and different chemical compositions. Radiation spectra computed with Compton scattering are softer than those computed without Compton scattering at high energies (E > 5 keV) for light elements (H or He) model atmospheres. The Compton effect is more significant in H model atmospheres and models with low surface gravity. The emergent spectra of the hottest (T_eff > 3 * 10^6 K) model atmospheres can be described by diluted blackbody spectra with hardness factors ~ 1.6 - 1.9. Compton scattering is less important in models with solar abundance of heavy elements.

V. Suleimanov; K. Werner

2007-02-15T23:59:59.000Z

432

Beyond the Standard Model: The Weak Scale, Neutrino Mass, and the Dark Sector  

SciTech Connect (OSTI)

The goal of this proposal was to advance theoretical studies into questions of collider physics at the weak scale, models and signals of dark matter, and connections between neutrino mass and dark energy. The project was a significant success, with a number of developments well beyond what could have been anticipated at the outset. A total of 35 published papers and preprints were produced, with new ideas and signals for LHC physics and dark matter experiments, in particular. A number of new ideas have been found on the possible indirect signals of models of dark matter which relate to the INTEGRAL signal of astrophysical positron production, high energy positrons seen at PAMELA and Fermi, studies into anomalous gamma rays at Fermi, collider signatures of sneutrino dark matter, scenarios of Higgs physics arising in SUSY models, the implications of galaxy cluster surveys for photon-axion conversion models, previously unconsidered collider phenomenology in the form of 'lepton jets' and a very significant result for flavor physics in supersymmetric theories. Progress continues on all fronts, including development of models with dramatic implications for direct dark matter searches, dynamics of dark matter with various excited states, flavor physics, and consequences of modified missing energy signals for collider searches at the LHC.

Weiner, Neal

2010-12-20T23:59:59.000Z

433

Weak-triplet, color-octet scalars and the CDF dijet excess  

DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

We extend the standard model to include a weak-triplet and color-octet scalar. This 'octo-triplet' field consists of three particles, two charged and one neutral, whose masses and renormalizable interactions depend only on two new parameters. The charged octo-triplet decay into a W boson and a gluon is suppressed by a loop factor and an accidental cancellation. Thus, the main decays of the charged octo-triplet may occur through higher-dimensional operators, mediated by a heavy vectorlike fermion, into quark pairs. For an octo-triplet mass below the tb? threshold, the decay into Wb b? through an off-shell top quark has a width comparable to that into cs? or cb?. Pair production with one octo-triplet decaying to two jets and the other decaying to a W and two soft b jets may explain the dijet-plus-W excess reported by the CDF Collaboration. The same higher-dimensional operators lead to CP violation in Bs-B?s mixing.

Dobrescu, Bogdan A.; Krnjaic, Gordan Z.

2012-04-24T23:59:59.000Z

434

The effect of 12C + 12C rate uncertainties on the weak s-process component  

SciTech Connect (OSTI)

The contribution by massive stars (M > 15M{sub {circle_dot}}) to the weak s-process component of the solar system abundances is primarily due to the {sup 22}Ne neutron source, which is activated near the end of helium-core burning. The residual {sup 22}Ne left over from helium-core burning is then reignited during carbon burning, initiating further s-processing that modifies the isotopic distribution. This modification is sensitive to the stellar structure and the carbon burning reaction rate. Recent work on the {sup 12}C + {sup 12}C reaction suggests that resonances located within the Gamow peak may exist, causing a strong increase in the astrophysical S-factor and consequently the reaction rate. To investigate the effect of such a rate, 25M{sub {circle_dot}} stellar models with different carbon burning rates, at solar metallicity, were generated using the Geneva Stellar Evolution Code (GENEC) with nucleosynthesis post-processing calculated using the NuGrid Multi-zone Post-Processing Network code (MPPNP). A strongly enhanced rate can cause carbon burning to occur in a convective core rather than a radiative one and the convective core mixes the matter synthesized there up into the carbon shell, significantly altering the initial composition of the carbon-shell. In addition, an enhanced rate causes carbon-shell burning episodes to ignite earlier in the evolution of the star, igniting the {sup 22}Ne source at lower temperatures and reducing the neutron density.

Fryer, Christopher Lee [Los Alamos National Laboratory; Hungerford, Aimee L [Los Alamos National Laboratory; Hirschi, Raphael [KEELE UNIV.; Pignatari, Marco [TRIUMF; Bennett, Michael E [KEELE UNIV.; Diehl, Steven [Los Alamos National Laboratory; Herwig, Falk [CANADA; Hillary, William [CANADA; Richman, Debra [CANADA; Rockefeller, Gabriel [Los Alamos National Laboratory; Timmes, Frank X [UNIV OF ARIZONA; Wiescher, Michael [UNIV OF NOTRE DAME

2010-09-10T23:59:59.000Z

435

Weakly collisional Landau damping and three-dimensional Bernstein-Greene-Kruskal modes: New results on old problemsa...  

E-Print Network [OSTI]

Weakly collisional Landau damping and three-dimensional Bernstein-Greene-Kruskal modes: New results February 2006; published online 8 May 2006 Landau damping and Bernstein-Greene-Kruskal BGK modes are among-center approximation . We show, in fact, that two- and three-dimensional solutions that depend only on energy do

Ng, Chung-Sang

436

Existence and stability of superconducting solutions for the Ginzburg-Landau equations in the presence of weak electric currents  

E-Print Network [OSTI]

For a reduced Ginzburg-Landau model in which the magnetic field is neglected, we prove, for weak electric currents, the existence of a steady-state solution in a vicinity of the purely superconducting state. We further show that this solution is linearly stable.

Yaniv Almog; Leonid Berlyand; Dmitry Golovaty; Itai Shafrir

2014-09-07T23:59:59.000Z

437

Hanle effect in the solar Ba II D2 line: a diagnostic tool for chromospheric weak magnetic fields  

E-Print Network [OSTI]

The physics of the solar chromosphere depends in a crucial way on its magnetic structure. However there are presently very few direct magnetic field diagnostics available for this region. Here we investigate the diagnostic potential of the Hanle effect on the Ba II D2 line resonance polarization for the determination of weak chromospheric turbulent magnetic fields......

M. Faurobert; M. Derouich; V. Bommier; J. Arnaud

2008-11-07T23:59:59.000Z

438

A new approach in the detection of weak ?-ray peak of the radioactive waste in tomography ? scanning  

E-Print Network [OSTI]

We demonstrate a new approach to efficiently detect weak {\\gamma}-ray peak of the radioactive waste in tomographic {\\gamma} scanning (TGS). In the TGS measurement, {\\gamma}-ray peak identification is usually difficult due to the short measurement time that results in a lower {\\gamma}-ray energy produced by the decay. Consequently, the resulting significant scattering in the low-energy side leads to strong statistical fluctuations and low detection efficiency that overwhelm the {\\gamma}-ray peak. Here, we propose the use of shift invariance wavelet algorithm for low-energy part of the spectrum for weak {\\gamma}-ray peak smoothing. The proposed algorithm not only overcomes the pseudo-Gibbs in the high-resolution {\\gamma}-ray spectrum de-noising by the traditional wavelet transform, but also keeps quality of the weak {\\gamma}-ray characteristic peak as well. Our new approach shows a significantly improved performance of the figure of merit (FOM) together with lower limit of quantitation (LLOQ) compared with the traditional wavelet transform. These results indicate the significant potential of our approach that could effectively increase the accuracy of weak {\\gamma}-ray detecting activation analysis in TGS.

Zhang Jinzha; Tuo Xianguo

2014-02-07T23:59:59.000Z

439

864revision:2006-05-15modified:2006-05-16 On Weak and Strong Interpolation in Algebraic  

E-Print Network [OSTI]

are called "meaning algebras". As it is well known, the meaning algebras of first order logics are different of the finite-variable fragments of First Order Logic in which a weak form of Craig's Interpolation Theorem holds but a strong form of this theorem does not hold. Translating these results into Algebraic Logic we

Shelah, Saharon

440

Red grouper is an economically important species of the southeast United States and in particular the Gulf of Mexico. Red grouper are highly territorial and often remain at the same site for long periods of  

E-Print Network [OSTI]

Red grouper is an economically important species of the southeast United States and in particular the Gulf of Mexico. Red grouper are highly territorial and often remain at the same site for long periods of time. We now know Red grouper are also engineering marvels for their ability to modify habitat through

Watson, Craig A.

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441

For French public opinion and government, in the early 1920s, Palestine remains "the most French land of the Orient", at a time when the loss of the Catholic French protectorate in the Holy  

E-Print Network [OSTI]

of Catholics. During this period, a broad appeal is made to French as an instrument of cultureFor French public opinion and government, in the early 1920s, Palestine remains "the most French land of the Orient", at a time when the loss of the Catholic French protectorate in the Holy Land

van den Brink, Jeroen

442

This vacancy will remain posted at Human Resources and will be listed on our web site until notification is received from the President's Office that the position has been filled or written notice is received that  

E-Print Network [OSTI]

NOTICE This vacancy will remain posted at Human Resources and will be listed on our web site until Positions When a vacancy occurs: Please send a copy of the letter of resignation (for a contract employee employee) to the President's Office as soon as a resignation is known. Filling a vacancy: 1. Complete

Gering, Jon C.

443

Bayesian Galaxy Shape Measurement for Weak Lensing Surveys -II. Application to Simulations  

E-Print Network [OSTI]

We extend the Bayesian model fitting shape measurement method presented in Miller et al. (2007) and use the method to estimate the shear from the Shear TEsting Programme simulations (STEP). The method uses a fast model fitting algorithm which uses realistic galaxy profiles and analytically marginalises over the position and amplitude of the model by doing the model fitting in Fourier space. This is used to find the full posterior probability in ellipticity so that the shear can be estimated in a fully Bayesian way. The Bayesian shear estimation allows measurement bias arising from the presence of random noise to be removed. In this paper we introduce an iterative algorithm that can be used to estimate the intrinsic ellipticity prior and show that this is accurate and stable. By using the method to estimate the shear from the STEP1 simulations we find the method to have a shear bias of m ~ 0.005 and a variation in shear offset with PSF type of sigma_c ~ 0.0002. These values are smaller than for any method presented in the STEP1 publication that behaves linearly with shear. Using the method to estimate the shear from the STEP2 simulations we find than the shear bias and offset are m ~ 0.002 and c ~ -0.0007 respectively. In addition we find that the bias and offset are stable to changes in magnitude and size of the galaxies. Such biases should yield any cosmological constraints from future weak lensing surveys robust to systematic effects in shape measurement.

T. D. Kitching; L. Miller; C. E. Heymans; L. van Waerbeke; A. F. Heavens

2008-02-12T23:59:59.000Z

444

Models of magnetic-field evolution and effective viscosity in weakly collisional extragalactic plasmas  

E-Print Network [OSTI]

In weakly collisional extragalactic plasmas such as the intracluster medium, viscous stress and the rate of change of the magnetic-field strength are proportional to the local pressure anisotropy, so subject to constraints imposed by the pressure-anisotropy-driven mirror and firehose instabilities and controlled by the local instantaneous plasma beta. The dynamics of such plasmas is dramatically different from a conventional MHD fluid. The plasma is expected to stay locally in a marginal state with respect to the instabilities, but how it does this is an open question. Two models of magnetic-field evolution are investigated. In the first, marginality is achieved via suppression of the rate of change of the field. In the second, the instabilities give rise to anomalous collisionality, reducing pressure anisotropy to marginal - at the same time decreasing viscosity and so increasing the turbulent rate of strain. Implications of these models are studied in a simplified 0D setting. In the first model, the field grows explosively but on a time scale that scales with initial beta, while in the second, dynamical field strength can be reached in one large-scale turbulence turn-over time regardless of the initial seed. Both models produce very intermittent fields. Both also suffer from strong constraints on their applicability: for typical cluster-core conditions, scale separation between the fluid motions and the microscale fluctuations breaks down at beta~10^5-10^4. At larger beta (weaker fields), a fully collisionless plasma dynamo theory is needed in order to justify the growth of the field from a tiny primordial seed. However, the models discussed here are appropriate for studying the structure of the currently observed field as well as large-scale dynamics and thermodynamics of the magnetized ICM or similarly dilute astrophysical plasmas.

Federico Mogavero; Alexander A. Schekochihin

2014-03-04T23:59:59.000Z

445

Kinetics of phase transitions in weakly segregated block copolymers: Pseudostable and transient states  

Science Journals Connector (OSTI)

We study the kinetics of order-disorder and order-order transitions in weakly segregated diblock copolymers using a time-dependent Ginzburg-Landau (TDGL) approach. In particular, we investigate the microstructural change as well as the order-parameter evolution after a sudden temperature jump from one phase to another. Direct numerical simulation of the TDGL equations shows that depending on the extent of the temperature jump, these transitions often occur in several stages and can involve nontrivial intermediate states. For example, we find that transition from the lamellar phase to the hexagonal cylinder phase goes through a perforated lamellar state within a certain temperature range. The numerical results are elucidated by a multimode analysis under the single-wave-number approximation. The analysis reveals that the geometric characteristics of the free energy surface, particularly saddle points and ridgelike features, are responsible for the nontrivial intermediate states on the kinetic pathways. On the basis of this analysis, a generalized kinetic ``phase diagram'' is constructed, which is able to account for all the different scenarios observed in the numerical simulation. Our results are discussed in connection with available experimental observations. In particular, we suggest the possibility that the perforated-modulated lamellar structures obtained by Bates and co-workers [I. W. Hamley, K. A. Koppi, J. H. Rosedale, F. S. Bates, K. Almdal, and K. Mortensen, Macromolecules 26, 5959 (1993); S. Förster, A. K. Khandpur, J. Zhao, F. S. Bates, I. W. Hamley, A. J. Ryan, and W. Bras, Macromolecules 27, 6922 (1994)] may be kinetic, intermediate states rather than new equilibrium phases.

Shuyan Qi and Zhen-Gang Wang

1997-02-01T23:59:59.000Z

446

Non-linear relativistic contributions to the cosmological weak-lensing convergence  

E-Print Network [OSTI]

Relativistic contributions to the dynamics of structure formation come in a variety of forms, and can potentially give corrections to the standard picture on typical scales of 100 Mpc. These corrections cannot be obtained by Newtonian numerical simulations, so it is important to accurately estimate the magnitude of these relativistic effects. Density fluctuations couple to produce a background of gravitational waves, which is larger than any primordial background. A similar interaction produces a much larger spectrum of vector modes which represent the frame-dragging rotation of spacetime. These can change the metric at the percent level in the concordance model at scales below the equality scale. Vector modes modify the lensing of background galaxies by large-scale structure. This gives in principle the exciting possibility of measuring relativistic frame dragging effects on cosmological scales. The effects of the non-linear tensor and vector modes on the cosmic convergence are computed and compared to first-order lensing contributions from density fluctuations, Doppler lensing, and smaller Sachs-Wolfe effects. The lensing from gravitational waves is negligible so we concentrate on the vector modes. We show the relative importance of this for future surveys such as Euclid and SKA. We find that these non-linear effects only marginally affect the overall weak lensing signal so they can safely be neglected in most analyses, though are still much larger than the linear Sachs-Wolfe terms. The second-order vector contribution can dominate the first-order Doppler lensing term at moderate redshifts and are actually more important for survey geometries like the SKA.

Sambatra Andrianomena; Chris Clarkson; Prina Patel; Obinna Umeh; Jean-Philippe Uzan

2014-02-18T23:59:59.000Z

447

Effects of electron-electron and electron-phonon interactions in weakly disordered conductors and heterostructures  

Science Journals Connector (OSTI)

We investigate quantum corrections to the conductivity due to the interference of electron-electron (electron-phonon) scattering and elastic electron scattering from impurities and defects in weakly disordered conductors. The interference corrections are proportional to the Drude conductivity and have various temperature dependences. The electron-electron interaction results in a T2 ln T correction in bulk conductors. In a quasi-two-dimensional (quasi-2D) conductor, d1) this correction is linear in temperature and differs from that for 2D electrons [G. Zala et al., Phys. Rev. B 64, 214204 (2001)] by a numerical factor. In quasi-one-dimensional conductors with 3D and 2D electron spectra (a wire with radius r

A. Sergeev; M. Yu. Reizer; V. Mitin

2004-02-18T23:59:59.000Z

448

Smart Structures and Systems, Vol. 7, No. 6 (2011) 000-000 1 Biological smart sensing strategies in weakly electric fish  

E-Print Network [OSTI]

-sensing systems in engineering applications. Weakly electric fish, which use self-generated electrical energy weakly electric fish generate electric fields using a specialized electric organ located in the tail-type electric fish generate EODs with little or no gap between successive discharges, resulting in a quasi

Nelson, Mark E.

449

arXiv:0709.4029v1[astro-ph]26Sep2007 Self Calibration of Tomographic Weak Lensing for the Physics of Baryons to  

E-Print Network [OSTI]

such as the Dark Energy Survey (DES), the SuperNova/Acceleration Probe (SNAP), and the Large Synoptic Survey lensing surveys to constrain both the internal structures of halos and the properties of the dark energy- ing probes of dark energy is weak gravitational lens- ing. Forthcoming weak lensing surveys expect

Hu, Wayne

450

A new method of observing weak extended x-ray sources with the Reuven Ramaty High-Energy Solar Spectroscopic Imager  

E-Print Network [OSTI]

A new method of observing weak extended x-ray sources with the Reuven Ramaty High-Energy Solar, for observing weak extended x-ray sources with the Reuven Ramaty High-Energy Solar Spectroscopic Imager RHESSI. INTRODUCTION The Reuven Ramaty High-Energy Solar Spectroscopic Imager, RHESSI,1 is a space-based solar x

California at Berkeley, University of

451

Astrophysical Gyrokinetics: Kinetic and Fluid Turbulent Cascades In Magentized Weakly Collisional Plasmas  

SciTech Connect (OSTI)

This paper presents a theoretical framework for understanding plasma turbulence in astrophysical plasmas. It is motivated by observations of electromagnetic and density fluctuations in the solar wind, interstellar medium and galaxy clusters, as well as by models of particle heating in accretion disks. All of these plasmas and many others have turbulentmotions at weakly collisional and collisionless scales. The paper focuses on turbulence in a strong mean magnetic field. The key assumptions are that the turbulent fluctuations are small compared to the mean field, spatially anisotropic with respect to it and that their frequency is low compared to the ion cyclotron frequency. The turbulence is assumed to be forced at some system-specific outer scale. The energy injected at this scale has to be dissipated into heat, which ultimately cannot be accomplished without collisions. A kinetic cascade develops that brings the energy to collisional scales both in space and velocity. The nature of the kinetic cascade in various scale ranges depends on the physics of plasma fluctuations that exist there. There are four special scales that separate physically distinct regimes: the electron and ion gyroscales, the mean free path and the electron diffusion scale. In each of the scale ranges separated by these scales, the fully kinetic problem is systematically reduced to a more physically transparent and computationally tractable system of equations, which are derived in a rigorous way. In the "inertial range" above the ion gyroscale, the kinetic cascade separates into two parts: a cascade of Alfvenic fluctuations and a passive cascade of density and magnetic-fieldstrength fluctuations. The former are governed by the Reduced Magnetohydrodynamic (RMHD) equations at both the collisional and collisionless scales; the latter obey a linear kinetic equation along the (moving) field lines associated with the Alfvenic component (in the collisional limit, these compressive fluctuations become the slow and entropy modes of the conventional MHD). In the "dissipation range" below ion gyroscale, there are again two cascades: the kinetic-Alfven-wave (KAW) cascade governed by two fluid-like Electron Reduced Magnetohydrodynamic (ERMHD) equations and a passive cascade of ion entropy fluctuations both in space and velocity. The latter cascade brings the energy of the inertial-range fluctuations that was Landau-damped at the ion gyroscale to collisional scales in the phase space and leads to ion heating. The KAWenergy is similarly damped at the electron gyroscale and converted into electron heat. Kolmogorov-style scaling relations are derived for all of these cascades. The relationship between the theoretical models proposed in this paper and astrophysical applications and observations is discussed in detail.

A.A. Schekochihin, S.C. Cowley, W. Dorland, G.W. Hammett, G.G. Howes, E. Quataert, and T. Tatsuno

2009-04-23T23:59:59.000Z

452

Energy dependence of the optical potential of weakly and tightly bound nuclei as projectiles on a medium-mass target  

SciTech Connect (OSTI)

Angular distributions for the elastic scattering of the weakly bound {sup 6,7}Li+{sup 144}Sm systems were measured with high accuracy at bombarding energies from 85% up to 170% of the Coulomb barrier. An optical model analysis was performed, and the relevant parameters of the real and imaginary parts of the optical potential were extracted. The results are compared with those previously published for the tightly bound {sup 12}C+{sup 144}Sm and {sup 16}O+{sup 144}Sm systems. The usual threshold anomaly observed in the behavior of the potential of tightly bound systems was not observed for either weakly bound system. This absence is attributed to the repulsion due to breakup coupling which cancels the attraction arising from couplings with bound channels.

Figueira, J. M.; Arazi, A.; Carnelli, P.; Heimann, D. Martinez; Negri, A. E.; Pacheco, A. J. [Laboratorio Tandar, Comision Nacional de Energia Atomica, B1650KNA San Martin, Buenos Aires (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas, C1033AAJ Ciudad de Buenos Aires (Argentina); Niello, J. O. Fernandez [Laboratorio Tandar, Comision Nacional de Energia Atomica, B1650KNA San Martin, Buenos Aires (Argentina); Consejo Nacional de Investigaciones Cientificas y Tecnicas, C1033AAJ Ciudad de Buenos Aires (Argentina); Escuela de Ciencia y Tecnologia, Universidad de San Martin, B1650BWA San Martin, Buenos Aires (Argentina); Capurro, O. A.; Fimiani, L.; Marti, G. V. [Laboratorio Tandar, Comision Nacional de Energia Atomica, B1650KNA San Martin, Buenos Aires (Argentina); Lubian, J.; Monteiro, D. S.; Gomes, P. R. S. [Instituto de Fisica, Universidade Federal Fluminense, Gragoata, Niteroi, R. J., 24210-340 (Brazil)

2010-02-15T23:59:59.000Z

453

On the transfer of energy towards infinity in the theory of weak turbulence for the nonlinear Schrödinger equation  

E-Print Network [OSTI]

We study the mathematical properties of a kinetic equation which describes the long time behaviour of solutions to the weak turbulence equation associated to the cubic nonlinear Schr\\"odinger equation. In particular, we give a precise definition of weak solutions and prove global existence of solutions for all initial data with finite mass. We also prove that any nontrivial initial datum yields the instantaneous onset of a condensate, i.e. a Dirac mass at the origin for any positive time. Furthermore we show that the only stationary solutions with finite total measure are Dirac masses at the origin. We finally construct solutions with finite energy, which is transferred to infinity in a self-similar manner.

A. H. M. Kierkels; J. J. L. Velázquez

2014-10-08T23:59:59.000Z

454

H2 production based on RDG and assisted by a weak grid. System topology, operation and control  

Science Journals Connector (OSTI)

The Renewable Distributed Generation (RDG), such as production of electricity in the vicinity of the load, it is particularly beneficial when the distribution network is "weak" facing specific demands, as in hydrogen production systems connected to rural electrification networks. In these areas, the wind resource may be suitable for this type of generation. This work proposes the topology and the operation and control strategy for a hydrogen production station, "assisted" by a weak AC grid and "powered" by a variable speed wind turbine based on a three-phase double stator induction machine. The wind energy conversion is optimized through adequate control of the generator. The electrolyzer current is regulated for the maximum utilization of the generated power. The high-speed power fluctuations by turbulence are compensated through a controlled energy storage system based on a flywheel. In addition, the system configuration, its operation mode and control, and simulation results are presented.

P.A. Camocardi; G.M. Toccaceli; P.E. Battaiotto; M.G. Cendoya

2012-01-01T23:59:59.000Z

455

Measurement of the Michel Parameter xi" in Polarized Muon Decay and Implications on Exotic Couplings of the Leptonic Weak Interaction  

E-Print Network [OSTI]

The Michel parameter xi" has been determined from a measurement of the longitudinal polarization of positrons emitted in the decay of polarized and depolarized muons. The result, xi" = 0.981 +- 0.045stat +- 0.003syst, is consistent with the Standard Model prediction of unity, and provides an order of magnitude improvement in the relative precision of this parameter. This value sets new constraints on exotic couplings beyond the dominant V-A description of the leptonic weak interaction.

R. Prieels; O. Naviliat-Cuncic; P. Knowles; P. Van Hove; X. Morelle; J. Egger; J. Deutsch; J. Govaerts; W. Fetscher; K. Kirch; J. Lang

2014-08-07T23:59:59.000Z

456

A new approach in the detection of weak {\\gamma}-ray peak of the radioactive waste in tomography {\\gamma} scanning  

E-Print Network [OSTI]

We demonstrate a new approach to efficiently detect weak {\\gamma}-ray peak of the radioactive waste in tomographic {\\gamma} scanning (TGS). In the TGS measurement, {\\gamma}-ray peak identification is usually difficult due to the short measurement time that results in a lower {\\gamma}-ray energy produced by the decay. Consequently, the resulting significant scattering in the low-energy side leads to strong statistical fluctuations and low detection efficiency that overwhelm the {\\gamma}-ray peak. Here, we propose the use of shift invariance wavelet algorithm for low-energy part of the spectrum for weak {\\gamma}-ray peak smoothing. The proposed algorithm not only overcomes the pseudo-Gibbs in the high-resolution {\\gamma}-ray spectrum de-noising by the traditional wavelet transform, but also keeps quality of the weak {\\gamma}-ray characteristic peak as well. Our new approach shows a significantly improved performance of the figure of merit (FOM) together with lower limit of quantitation (LLOQ) compared with the ...

Jinzha, Zhang

2014-01-01T23:59:59.000Z

457

Weak value amplification: a view from quantum estimation theory that highlights what it is and what isn't  

E-Print Network [OSTI]

Weak value amplification, a 25 five years old technique used in metrology applications, has proved to be highly successful for measuring extremely tiny changes of a variable of interest. In spite of this, in what sense the technique is useful is still a question of debate. Here we show, making use of simple ideas taken from quantum estimation theory, what is the main contribution of the concept of weak value amplification to metrology. On the one hand, since the technique makes use of linear-optics unitary operations, it cannot modify the statistics of photons involved, and therefore, its capabilities are still fundamentally limited by the quantum nature of the light used. On the other hand, in certain scenarios weak value amplification can effectively enhance the sensitivity of real non-ideal detection schemes that might be limited by many other things apart from the specific characteristics of the light, i.e. technical noise. Importantly, it can do that in a straightforward and easily accessible manner.

Juan P. Torres; Luis Jose Salazar-Serrano

2014-08-08T23:59:59.000Z

458

Coherent oscillations between two weakly coupled Bose-Einstein Condensates: Josephson effects, $?$-oscillations, and macroscopic quantum self trapping  

E-Print Network [OSTI]

We discuss the coherent atomic oscillations between two weakly coupled Bose-Einstein condensates. The weak link is provided by a laser barrier in a (possibly asymmetric) double-well trap or by Raman coupling between two condensates in different hyperfine levels. The Boson Josephson Junction (BJJ) dynamics is described by the two-mode non-linear Gross-Pitaevskii equation, that is solved analytically in terms of elliptic functions. The BJJ, being a $neutral$, isolated system, allows the investigations of new dynamical regimes for the phase difference across the junction and for the population imbalance, that are not accessible with Superconductor Josephson Junctions (SJJ). These include oscillations with either, or both of the following properties: 1) the time-averaged value of the phase is equal to $\\pi$ ($\\pi-phase$ oscillations); 2) the average population imbalance is nonzero, in states with ``macroscopic quantum self-trapping'' (MQST). The (non-sinusoidal) generalization of the SJJ `ac' and `plasma' oscillations and the Shapiro resonance can also be observed. We predict the collapse of experimental data (corresponding to different trap geometries and total number of condensate atoms) onto a single universal curve, for the inverse period of oscillations. Analogies with Josephson oscillations between two weakly coupled reservoirs of $^3$He-B and the internal Josephson effect in $^3$He-A are also discussed.

S. Raghavan; A. Smerzi; S. Fantoni; S. R. Shenoy

1997-06-23T23:59:59.000Z

459

Remaining Sites Verification Package for the 100-F-36, 108-F Biological Laboratory, and for the 116-F-15, 108-F Radiation Crib, Waste Site Reclassification Form 2007-003  

SciTech Connect (OSTI)

The 116-F-15 waste site is the former location of the 108-F Radiation Crib that was located in the first floor of the 108-F Biological Laboratory. In accordance with this evaluation, the verification sampling results support a reclassification of this site to Interim Closed Out. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. The results of verification sampling show that residual contaminant concentrations do not preclude any future uses and allow for unrestricted use of shallow zone soils. The results also demonstrate that residual contaminant concentrations are protective of groundwater and the Columbia River.

L. M. Dittmer

2007-05-24T23:59:59.000Z

460

EVALUATION OF ACTIVATION PRODUCTS IN REMAINING IN REMAINING K-, L- AND C-REACTOR STRUCTURES  

SciTech Connect (OSTI)

An analytic model and calculational methodology was previously developed for P-reactor and R-reactor to quantify the radioisotopes present in Savannah River Site (SRS) reactor tanks and the surrounding structural materials as a result of neutron activation of the materials during reactor operation. That methodology has been extended to K-reactor, L-reactor, and C-reactor. The analysis was performed to provide a best-estimate source term input to the Performance Assessment for an in-situ disposition strategy by Site Decommissioning and Demolition (SDD). The reactor structure model developed earlier for the P-reactor and R-reactor analyses was also used for the K-reactor and L-reactor. The model was suitably modified to handle the larger Creactor tank and associated structures. For all reactors, the structure model consisted of 3 annular zones, homogenized by the amount of structural materials in the zone, and 5 horizontal layers. The curie content on an individual radioisotope basis and total basis for each of the regions was determined. A summary of these results are provided herein. The efficacy of this methodology to accurately predict the radioisotopic content of the reactor systems in question has been demonstrated and is documented in Reference 1. As noted in that report, results for one reactor facility cannot be directly extrapolated to other SRS reactors.

Vinson, D.; Webb, R.

2010-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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We encourage you to perform a real-time search of NLEBeta
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461

Measurement of the $?$-asymmetry parameter of $^{67}$Cu in search for tensor type currents in the weak interaction  

E-Print Network [OSTI]

Precision measurements at low energy search for physics beyond the Standard Model in a way complementary to searches for new particles at colliders. In the weak sector the most general $\\beta$ decay Hamiltonian contains, besides vector and axial-vector terms, also scalar, tensor and pseudoscalar terms. Current limits on the scalar and tensor coupling constants from neutron and nuclear $\\beta$ decay are on the level of several percent. The goal of this paper is extracting new information on tensor coupling constants by measuring the $\\beta$-asymmetry parameter in the pure Gamow-Teller decay of $^{67}$Cu, thereby testing the V-A structure of the weak interaction. An iron sample foil into which the radioactive nuclei were implanted was cooled down to milliKelvin temperatures in a $^3$He-$^4$He dilution refrigerator. An external magnetic field of 0.1 T, in combination with the internal hyperfine magnetic field, oriented the nuclei. The anisotropic $\\beta$ radiation was observed with planar high purity germanium detectors operating at a temperature of about 10\\,K. An on-line measurement of the $\\beta$ asymmetry of $^{68}$Cu was performed as well for normalization purposes. Systematic effects were investigated using Geant4 simulations. The experimental value, $\\tilde{A}$ = 0.587(14), is in agreement with the Standard Model value of 0.5991(2) and is interpreted in terms of physics beyond the Standard Model. The limits obtained on possible tensor type charged currents in the weak interaction hamiltonian are -0.045 $< (C_T+C'_T)/C_A <$ 0.159 (90\\% C.L.). The obtained limits are comparable to limits from other correlation measurements in nuclear $\\beta$ decay and contribute to further constraining tensor coupling constants.

G. Soti; F. Wauters; M. Breitenfeldt; P. Finlay; P. Herzog; A. Knecht; U. Köster; I. S. Kraev; T. Porobic; P. N. Prashanth; I. S. Towner; C. Tramm; D. Zákoucký; N. Severijns

2014-09-05T23:59:59.000Z

462

Simultaneous Retrieval of Effective Refractive Index and Density from Size Distribution and Light Scattering Data: Weakly-Absorbing Aerosol  

SciTech Connect (OSTI)

We propose here a novel approach for retrieving in parallel the effective density and real refractive index of weakly absorbing aerosol from optical and size distribution measurements. Here we define “weakly absorbing” as aerosol single-scattering albedos that exceed 0.95 at 0.5 um.The required optical measurements are the scattering coefficient and the hemispheric backscatter fraction, obtained in this work from an integrating nephelometer. The required size spectra come from a Scanning Mobility Particle Sizer and an Aerodynamic Particle Sizer. The performance of this approach is first evaluated using a sensitivity study with synthetically generated but measurement-related inputs. The sensitivity study reveals that the proposed approach is robust to random noise; additionally the uncertainties of the retrieval are almost linearly proportional to the measurement errors, and these uncertainties are smaller for the real refractive index than for the effective density. Next, actual measurements are used to evaluate our approach. These measurements include the optical, microphysical, and chemical properties of weakly absorbing aerosol which are representative of a variety of coastal summertime conditions observed during the Two-Column Aerosol Project (TCAP; http://campaign.arm.gov/tcap/). The evaluation includes calculating the root mean square error (RMSE) between the aerosol characteristics retrieved by our approach, and the same quantities calculated using the conventional volume mixing rule for chemical constituents. For dry conditions (defined in this work as relative humidity less than 55%) and sub-micron particles, a very good (RMSE~3%) and reasonable (RMSE~28%) agreement is obtained for the retrieved real refractive index (1.49±0.02) and effective density (1.68±0.21), respectively. Our approach permits discrimination between the retrieved aerosol characteristics of sub-micron and sub-10micron particles. The evaluation results also reveal that the retrieved density and refractive index tend to decrease with an increase of the relative humidity.

Kassianov, Evgueni I.; Barnard, James C.; Pekour, Mikhail S.; Berg, Larry K.; Shilling, John E.; Flynn, Connor J.; Mei, Fan; Jefferson, Anne

2014-10-01T23:59:59.000Z

463

Chiral phase transition in relativistic heavy-ion collisions with weak magnetic fields: Ring diagrams in the linear sigma model  

Science Journals Connector (OSTI)

Working in the linear sigma model with quarks, we compute the finite-temperature effective potential in the presence of a weak magnetic field, including the contribution of the pion ring diagrams and considering the sigma as a classical field. In the approximation where the pion self-energy is computed perturbatively, we show that there is a region of the parameter space where the effect of the ring diagrams is to preclude the phase transition from happening. Inclusion of the magnetic field has small effects that however become more important as the system evolves to the lowest temperatures allowed in the analysis.

Alejandro Ayala; Adnan Bashir; Alfredo Raya; Angel Sánchez

2009-08-10T23:59:59.000Z

464

Near- and subbarrier elastic and quasielastic scattering of the weakly bound {sup 6}Li projectile on {sup 144}Sm  

SciTech Connect (OSTI)

High-precision data of backward-angle elastic and quasielastic scattering for the weakly bound {sup 6}Li projectile on {sup 144}Sm target at deep-sub-barrier, near-, and above-barrier energies were measured. From the deep-sub-barrier data, the surface diffuseness of the nuclear interacting potential was studied. Barrier distributions were extracted from the first derivatives of the elastic and quasielastic excitation functions. It is shown that sequential breakup through the first resonant state of the {sup 6}Li is an important channel to be included in coupled-channels calculations, even at deep-sub-barrier energies.

Monteiro, D. S.; Otomar, D. R.; Lubian, J.; Gomes, P. R. S. [Instituto de Fisica, Universidade Federal Fluminense, Av. Litoranea s/n, Gragoata, Niteroi, R.J., 24210-340 (Brazil); Capurro, O. A.; Marti, G. V. [Laboratorio TANDAR, Comision Nacional de Energia Atomica, Av. General Paz 1499, 1650 San Martin, Buenos Aires (Argentina); Arazi, A.; Figueira, J. M.; Heimann, D. Martinez; Negri, A. E.; Pacheco, A. J. [Laboratorio TANDAR, Comision Nacional de Energia Atomica, Av. General Paz 1499, 1650 San Martin, Buenos Aires (Argentina); CONICET, Av. Rivadavia 1917, Buenos Aires (1033) (Argentina); Niello, J. O. Fernandez [Laboratorio TANDAR, Comision Nacional de Energia Atomica, Av. General Paz 1499, 1650 San Martin, Buenos Aires (Argentina); CONICET, Av. Rivadavia 1917, Buenos Aires (1033) (Argentina); Escuela de Ciencia y Tecnologia, Univ. Nac. de San Martin, San Martin (1650), Buenos Aires (Argentina); Guimaraes, V. [Instituto de Fisica, Universidade de Sao Paulo, Caixa postal 66318, 05315-970, Sao Paulo, S.P. (Brazil)

2009-01-15T23:59:59.000Z

465

Probing neutrino physics with a self-consistent treatment of the weak decoupling, nucleosynthesis, and photon decoupling epochs  

E-Print Network [OSTI]

We show that a self-consistent and coupled treatment of the weak decoupling, big bang nucleosynthesis, and photon decoupling epochs can be used to provide new insights and constraints on neutrino sector physics from high-precision measurements of light element abundances and cosmic microwave background observables. Implications of beyond-standard-model physics in cosmology, especially within the neutrino sector, are assessed by comparing predictions against five observables: the baryon energy density, helium abundance, deuterium abundance, effective number of neutrinos, and sum of the light neutrino mass eigenstates. We give examples for constraints on dark radiation, neutrino rest mass, lepton numbers, and scenarios for light and heavy sterile neutrinos.

Grohs, E; Kishimoto, C T; Paris, M W

2015-01-01T23:59:59.000Z

466

Verification, optimization and refinement of a direct-inverse transonic wing design method including weak viscous interaction  

E-Print Network [OSTI]

and Refinement of a. Direct-Inverse Transonic Wing Design Method Including Weak Viscous Interaction. (August 1989) Robert R. Ratcliff, B. S. , Texas A&M University Chair oi' Advisory Committee: Dr. Leland A. Carlson New developments in the direct-inverse wing... AND DISCUSSION . 92 VI V. 1 Bound&ary L&iyer and Wake Effects . . V. 2 Spanwise Grid Skewness V. 3 Wing Planform Effects V. 4 Initial Profile Efi'ects V. 5 Pressure Distribution Compatibility V. 6 Grid Refinement Effects . . V. 7 Fixed Trailing Edge...

Ratcliff, Robert R.

2012-06-07T23:59:59.000Z

467

Asymptotic response of observables from divergent weak-coupling expansions: A fractional-calculus-assisted Padé technique  

Science Journals Connector (OSTI)

Appropriate constructions of Padé approximants are believed to provide reasonable estimates of the asymptotic (large-coupling) amplitude and exponent of an observable, given its weak-coupling expansion to some desired order. In many instances, however, sequences of such approximants are seen to converge very poorly. We outline here a strategy that exploits the idea of fractional calculus to considerably improve the convergence behavior. Pilot calculations on the ground-state perturbative energy series of quartic, sextic, and octic anharmonic oscillators reveal clearly the worth of our endeavor.

Sharmistha Dhatt and Kamal Bhattacharyya

2012-08-30T23:59:59.000Z

468

Bridging over p-wave pi-production and weak processes in few-nucleon systems with chiral perturbation theory  

E-Print Network [OSTI]

I study an aspect of chiral perturbation theory (\\chi PT) which enables one to ``bridge'' different reactions. That is, an operator fixed in one of the reactions can then be used to predict the other. For this purpose, I calculate the partial wave amplitude for the p-wave pion production (pp\\to pn\\pi^+) using the pion production operator from the lowest and the next nonvanishing orders. The operator includes a contact operator whose coupling has been fixed using a matrix element of a low-energy weak process (pp\\to de^+\

Satoshi X. Nakamura

2008-05-13T23:59:59.000Z

469

Role of exchange in density-functional theory for weakly interacting systems: Quantum Monte Carlo analysis of electron density and interaction energy  

E-Print Network [OSTI]

We analyze the density-functional theory (DFT) description of weak interactions by employing diffusion and reptation quantum Monte Carlo (QMC) calculations, for a set of benzene-molecule complexes. While the binding energies ...

Grossman, Jeffrey C.

470

potential function derived from the original weak membrane energy function that promotes formation of discontinuities, through the variation of a control parameter.  

E-Print Network [OSTI]

131 potential function derived from the original weak membrane energy function that promotes function is approached rather than being approximated, the original intent of the objective function a sequence of objective functions that more closely approximate the original objective function

Duncan, James S.

471

In-situ weak-beam and polarization control of multidimensional laser sidebands for ultrafast optical switching  

SciTech Connect (OSTI)

All-optical switching has myriad applications in optoelectronics, optical communications, and quantum information technology. To achieve ultrafast optical switching in a compact yet versatile setup, we demonstrate distinct sets of two-dimensional (2D) broadband up-converted multicolor arrays (BUMAs) in a thin type-I ?-barium-borate crystal with two noncollinear near-IR femtosecond pulses at various phase-matching conditions. The unique interaction mechanism is revealed as quadratic spatial solitons (QSSs)-coupled cascaded four-wave mixing (CFWM), corroborated by numerical calculations of the governing phase-matching conditions. Broad and continuous spectral-spatial tunability of the 2D BUMAs are achieved by varying the time delay between the two incident pulses that undergo CFWM interaction, rooted in the chirped nature of the weak white light and the QSSs generation of the intense fundamental beam. The control of 2D BUMAs is accomplished via seeding a weak second-harmonic pulse in situ to suppress the 2D arrays with polarization dependence on the femtosecond timescale that matches the control pulse duration of ?35 fs. A potential application is proposed on femtosecond all-optical switching in an integrated wavelength-time division multiplexing device.

Liu, Weimin; Wang, Liang; Fang, Chong, E-mail: Chong.Fang@oregonstate.edu [Department of Chemistry, Oregon State University, Corvallis, Oregon 97331 (United States)

2014-03-17T23:59:59.000Z

472

The MOLLER Experiment: An Ultra-Precise Measurement of the Weak Mixing Angle Using M{\\o}ller Scattering  

E-Print Network [OSTI]

The physics case and an experimental overview of the MOLLER (Measurement Of a Lepton Lepton Electroweak Reaction) experiment at the 12 GeV upgraded Jefferson Lab are presented. A highlight of the Fundamental Symmetries subfield of the 2007 NSAC Long Range Plan was the SLAC E158 measurement of the parity-violating asymmetry $A_{PV}$ in polarized electron-electron (M{\\o}ller) scattering. The proposed MOLLER experiment will improve on this result by a factor of five, yielding the most precise measurement of the weak mixing angle at low or high energy anticipated over the next decade. This new result would be sensitive to the interference of the electromagnetic amplitude with new neutral current amplitudes as weak as $\\sim 10^{-3}\\cdot G_F$ from as yet undiscovered dynamics beyond the Standard Model. The resulting discovery reach is unmatched by any proposed experiment measuring a flavor- and CP-conserving process over the next decade, and yields a unique window to new physics at MeV and multi-TeV scales, complem...

Benesch, J; Carlini, R D; Chen, J-P; Chudakov, E; Covrig, S; Dalton, M M; Deur, A; Gaskell, D; Gavalya, A; Gomez, J; Higinbotham, D W; Keppel, C; Meekins, D; Michaels, R; Moffit, B; Roblin, Y; Suleiman, R; Wines, R; Wojtsekhowski, B; Cates, G; Crabb, D; Day, D; Gnanvo, K; Keller, D; Liyanage, N; Nelyubin, V V; Nguyen, H; Norum, B; Paschke, K; Sulkosky, V; Zhang, J; Zheng, X; Birchall, J; Blunden, P; Gericke, M T W; Falk, W R; Lee, L; Mammei, J; Page, S A; van Oers, W T H; Dehmelt, K; Deshpande, A; Feege, N; Hemmick, T K; Kumar, K S; Kutz, T; Miskimen, R; Ramsey-Musolf, M J; Riordan, S; Taylor, N Hirlinger; Bessuille, J; Ihloff, E; Kelsey, J; Kowalski, S; Silwal, R; De Cataldo, G; De Leo, R; Di Bari, D; Lagamba, L; Bellini, E NappiV; Mammoliti, F; Noto, F; Sperduto, M L; Sutera, C M; Cole, P; Forest, T A; Khandekar, M; McNulty, D; Aulenbacher, K; Baunack, S; Maas, F; Tioukine, V; Gilman, R; Myers, K; Ransome, R; Tadepalli, A; Beniniwattha, R; Holmes, R; Souder, P; Armstrong, D S; Averett, T D; Deconinck, W; Duvall, W; Lee, A; Pitt, M L; Dunne, J A; Dutta, D; Fassi, L El; De Persio, F; Meddi, F; Urciuoli, G M; Cisbani, E; Fanelli, C; Garibaldi, F; Johnston, K; Simicevic, N; Wells, S; King, P M; Roche, J; Arrington, J; Reimer, P E; Franklin, G; Quinn, B; Ahmidouch, A; Danagoulian, S; Glamazdin, O; Pomatsalyuk, R; Mammei, R; Martin, J W; Holmstrom, T; Erler, J; Kolomensky, Yu G; Napolitano, J; Aniol, K A; Ramsay, W D; Korkmaz, E; Spayde, D T; Benmokhtar, F; Del Dotto, A; Perrino, R; Barkanova, S; Aleksejevs, A; Singh, J

2014-01-01T23:59:59.000Z

473

Banking on Solar: Debt Finance in Today's Distributed Market...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Solar Loans (5-, 10-, and 20-year) vs. Solar PPA and SDG&E Blended Residential Rate Over the last two years, several entities-from banks to credit unions to solar...

474

Briefing Paper The child welfare implications of problem debt  

E-Print Network [OSTI]

where contact is not completely lost the child may have to cope with frequent moves between parental on the ability of some parents to undertake paid employment. They are therefore more vulnerable to income difficulties within the household; the duration of these; and the coping strategies employed by parents

Birmingham, University of

475

Household Need for Liquidity and the Credit Card Debt Puzzle  

E-Print Network [OSTI]

Vendemia. 2006. “The CE and the PCE: A Comparison”. Monthlymeasurement. This is the CEX/PCE ratio, which calculates howdi?erently than in the PCE, so that the aggregated CEX

Telyukova, Irina A.

2012-01-01T23:59:59.000Z

476

Figuring Out What the Debt Agreement Means for Science  

Science Journals Connector (OSTI)

...could go back and revise it. However, I'm very concerned about 2014 and beyond.” In his worst-case scenario, Michael Lubell, a lobbyist for the American Physical Society (APS), calculates across-the-board cuts of 11% to discretionary programs...

Jeffrey Mervis

2011-08-12T23:59:59.000Z

477

Banking on Solar: Debt Finance in Today's Distributed Market (Poster)  

SciTech Connect (OSTI)

Over the last two years, several entities - from banks to credit unions to solar finance companies -have rolled out distributed solar-specific loan programs in the United States. These solar-specific loans are a distinct loan in that the underwriting, loan terms, lender security interest, and other programmatic aspects are designed exclusively for the financing of solar installations. Until recently, loan financing for distributed solar installations was largely through home equity loans, commercial loans, and other standardized loan products available to homeowners and businesses for general expenditures. However, as the U.S. solar market matures, so too are its financing options, and solar-specific loans stand to gain market share. This poster was presented at the Solar Power International conference in Las Vegas, NV in October 2014.

Louder, T.

2014-10-01T23:59:59.000Z

478

Spectral diffusion of molecular electronic transitions in amorphous solids: Weak and strong two-level-system phonon coupling  

SciTech Connect (OSTI)

The two-level-system (TLS) model of glasses is used with nonphenomenological TLS distribution functions [R. Jankowiak [ital et] [ital al]., J. Phys. Chem. 90, 3896 (1986)] to account for the time-dependent spectral-diffusion data for cresyl violet and zinc porphin in ethanol glasses at low temperatures [K. A. Littau and M. D. Fayer, Chem. Phys. Lett. 176, 551 (1991); H. C. Meijers and D. A. Wiersma, Phys. Rev. Lett. 68, 381 (1992)]. The two distributions of faster and slower TLS relaxation rates required to fit the data are characterized for both weak and strong TLS-phonon coupling. Comparison of the values obtained for the TLS parameters with those determined earlier for specific heat, thermal conductivity, pure dephasing, and spontaneous filling of nonphotochemical holes establishes that the faster and slower distributions are associated with intrinsic and extrinsic TLS. The pronounced effects of strong coupling on the TLS relaxation-rate distributions are discussed.

Jankowiak, R.; Small, G.J. (Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States))

1993-06-01T23:59:59.000Z

479

Dynamical analysis of a weakly coupled nonlinear dielectric waveguide: Surface-plasmon model as another type of Josephson junction  

SciTech Connect (OSTI)

We propose that a weakly coupled nonlinear dielectric waveguide surface-plasmon system can be formulated as another type of Josephson junction. Such a system can be realized along a metal-dielectric interface where the dielectric medium hosts a nonlinear waveguide (e.g., fiber) for soliton propagation. We demonstrate that the system is in close analogy to the bosonic Josephson junction of atomic condensates at very low temperatures, yet exhibits different dynamical features. In particular, the inherently dynamic coupling parameter between soliton and surface plasmon generates self-trapped oscillatory states at nonzero fractional populations with zero and {pi} time-averaged phase difference. The salient features of the dynamics are presented in the phase space.

Eksioglu, Yasa; Muestecaplioglu, Oezguer E.; Gueven, Kaan [Department of Physics, Koc University, Istanbul (Turkey)

2011-09-15T23:59:59.000Z

480

Dynamical analysis of a weakly coupled nonlinear dielectric waveguide -- surface-plasmon model as a new type of Josephson Junction  

E-Print Network [OSTI]

We propose that a weakly-coupled nonlinear dielectric waveguide -- surface-plasmon system can be formulated as a new type of Josephson junction. Such a system can be realized along a metal - dielectric interface where the dielectric medium hosts a nonlinear waveguide (e.g. fiber) for soliton propagation. We demonstrate that the system is in close analogy to the bosonic Josephson-Junction (BJJ) of atomic condensates at very low temperatures, yet exhibits different dynamical features. In particular, the inherently dynamic coupling parameter between soliton and surface-plasmon generates self-trapped oscillatory states at nonzero fractional populations with zero and $\\pi$ time averaged phase difference. The salient features of the dynamics are presented in the phase space.

Ek?io?lu, Yasa; Güven, Kaan

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "remain weak debt" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Case 6-2009 — A 37-Year-Old Woman with Vertigo, Facial Weakness, and a Generalized Seizure  

Science Journals Connector (OSTI)

...considered most likely, in view of both the pattern of CNS involvement documented by MRI and the mediastinal and hilar lymphadenopathy. Neurosarcoidosis is a chronic granulomatous disease that varies in incidence around the world and among racial and ethnic groups — in the United States, the adjusted annual... A 37-year-old woman had a 4-month history of episodes of vertigo, followed by tinnitus, decreased hearing in her right ear, and right facial weakness; on the day of admission, she had a generalized seizure. On admission, she was confused and combative and had garbled speech, a right facial droop, and generalized hyperreflexia. Magnetic resonance imaging of the brain and spinal cord revealed multifocal linear and nodular enhancement of the leptomeninges. A diagnostic procedure was performed.

Cros D.Gonzalez R.G.Mark E.J.

2009-02-19T23:59:59.000Z

482

Effect of a weak polar misalignment of the magnetic field on the stabilization of the Hadley flow  

Science Journals Connector (OSTI)

We study the stability of an infinite differentially heated liquid metal layer bounded by two horizontal walls and submitted to an external magnetic field subjected to a slight polar deviation with respect to the initially selected direction. The effects of the weak deviation on the stability characteristics of the two-dimensional stationary and three-dimensional oscillatory instabilities which can develop in such a liquid layer are investigated. The flow exhibits some interesting and unexpected stability characteristics. The effect of the deviation is either stabilizing or destabilizing depending essentially on the initially selected magnetic field orientation: longitudinal, transverse or vertical. In general, when the deviation angle increases the critical values of the Grashof number, the wave numbers and the frequency deviate from the asymptotic behaviours observed for large values of the Hartmann number, Ha > 20 , in the case without deviation. New features and behaviours are found for some orientations of the magnetic field.

Aouatef Rachdi; Slim Kaddeche; Adel Gharbi; Ta?¨eb Lili; Daniel Henry; Hamda Ben Hadid

2007-01-01T23:59:59.000Z

483

Second order corrections to mean field evolution for weakly interacting Bosons in the case of 3-body interactions  

E-Print Network [OSTI]

In this paper, we consider the Hamiltonian evolution of N weakly interacting Bosons. Assuming triple collisions, its mean field approximation is given by a quintic Hartree equation. We construct a second order correction to the mean field approximation using a kernel k(t,x,y) and derive an evolution equation for k. We show the global existence for the resulting evolution equation for the correction and establish an apriori estimate comparing the approximation to the exact Hamiltonian evolution. Our error estimate is global and uniform in time. Comparing with the work in [22,12,13] where the error estimate grows in time, our approximation tracks the exact dynamics for all time with an error of the order O(1/$\\sqrt{N}$).

Xuwen Chen

2010-11-27T23:59:59.000Z

484

Electron-electron interaction effect on the conductivity and the Hall conductivity of weakly disordered electron systems  

Science Journals Connector (OSTI)

The effect of the electron-electron Coulomb interaction on the conductivity and Hall conductivity of weakly disordered (T?>1, where ? is the electron mean free path) three- and two-dimensional electron systems is studied. We find that (i) temperature-dependent interaction corrections to the impurity resistivity and the Hall coefficient are positive in three and two dimensions; (ii) in two dimensions, gapless plasmons and particle-hole excitations both contribute to the electron-electron-impurity interference correction, to the resistivity; and (iii) in two-dimensional electron systems such as GaAs heterojunctions, the electron-electron interaction gives the leading temperature-dependent correction to the impurity conductivity and the Hall conductivity more important than the corresponding corrections from the piezoelectric electron-phonon interaction.

Michael Reizer

1998-05-15T23:59:59.000Z

485

Dynamic performance of static and synchronous compensators at an HVDC inverter bus in a very weak AC system  

SciTech Connect (OSTI)

This paper discusses the performance of dynamic voltage control devices at the inverters of very weak ac systems. The types of compensation considered are: (a) static var compensator (SVC), (b) synchronous compensator (SC), (c) a mix of the two and (d) fixed capacitors. Although the primary purpose of these compensators is to control voltage at the ac bus, their dynamic performance during system disturbances is a very important factor. The investigation includes the behavior of the various voltage control options under ac and dc disturbances. The paper shows that the SVC has the fastest response for load rejection type of overvoltages, but can cause serious problems with recovery during undervoltages caused by single phase faults. The CIGRE benchmark model for HVdc control studies has been modified and used in this study. In particular the effect of local load has been included.

Nayak, O.B.; Gole, A.M. (Univ. of Manitoba, Winnipeg (Canada)); Chapman, D.G.; Davies, J.B. (Manitoba Hydro, Winnipeg (Canada))

1994-08-01T23:59:59.000Z

486

Initiation of weak coal-dust explosions in long galleriesand the importance of the time dependence of the explosion pressure  

Science Journals Connector (OSTI)

Weak coal-dust explosions in galleries (large horizontal tubes) are defined in the paper asthe early stages of what may eventually become a self-sustaining, steady-state situation, if the scale is large enough. An initiating explosion producing a pressure rise of at least 12 kPa is needed to start an explosion from any additional dust that lies beyond the initiating zone; entrainment of this additional dust leads to the main explosion. In long galleries, initiating explosions in the range 16±2 kPa are mostly used. The early stages of the main explosion resemble explosions in which combustion of a very low concentration of coal-dust particles is taking place over a considerable volume at any given time, rather than explosions in which a flame, having a more or less definable front and rear, is propagating through a preformed explosive mixture. The explosions are described in terms of the general shape of the pressure changes occurring at a point near the outermost extent of the flame that is produced by the initiation explosion alone. The initial pressure rise is determined by the form of the initiating explosion and is followed by a roughly exponential pressure increase (from atmospheric pressure), whose time constant depends on the nature of the coal-dust, its dispersion, and the dimensions and characteristics of the gallery. The effects on the development of the explosion of the presence of short dust deposits, suppressive devices, and the ignition of predispersed clouds are briefly discussed. It is concluded that, in weak explosions, propagation results from dust being swept from the floor into the zone of combustion behind the flame front. However, as pressures increase to above, say, 100 kPa, other mechanisms become responsible and, perhaps, a pre-detonation regime sets in.

D. Rae

1973-01-01T23:59:59.000Z

487

Heat transport through a quantum Brownian harmonic chain beyond the weak-coupling regime: An exact treatment  

E-Print Network [OSTI]

We consider a linear chain of quantum harmonic oscillators, in which the number of the individual oscillators is given by an arbitrary number N, and each oscillator is coupled at an arbitrary strength kappa to its nearest neighbors ("intra-coupling"), as well as the two end oscillators of the chain are coupled at an arbitrary strength c_nu to two separate baths at arbitrarily different temperatures, respectively. We derive an exact closed expression for the steady-state heat current flowing from a hot bath through the chain to a cold bath, in the Drude-Ullersma damping model going beyond the Markovian damping. This allows us to explore the behavior of heat current relative to the intra-coupling strength as a control parameter, especially in pursuit of the heat power amplification. Then it turns out that in the weak-coupling regime (kappa, c_nu heat current is small, as expected, and almost independent of chain length N, hence violating Fourier's law of heat conduction; this is consistent to the earlier results obtained within the rotating wave approximation for the intra-coupling as well as in the Born-Markov approximation for the chain-bath coupling. Beyond the weak-coupling regime, on the other hand, we typically observe that with increase of the intra-coupling strength the heat current is gradually amplified, and reaches its maximum value at some specific coupling strength kappa_R "resonant" to a given chain-bath coupling strength. Also, the behavior of heat current versus chain length appears typically in such a way that the magnitude of current reaches its maximum with N=1 and then gradually decreases with increase of the chain length, being in fact almost N-independent in the range of N large enough. As a result, Fourier's law proves violated also in this regime.

Ilki Kim

2014-04-02T23:59:59.000Z

488

Impact of the uncertainty in ?-captures on {sup 22}Ne on the weak s-process in massive stars  

SciTech Connect (OSTI)

Massive stars at solar metallicity contribute to the production of heavy elements with atomic masses between A = 60 and A = 90 via the so-called weak s-process (which takes place during core He and shell C burning phases). Furthermore, recent studies have shown that rotation boosts the s-process production in massive stars at low metallicities, with a production that may reach the barium neutron-magic peak. These results are very sensitive to neutron source and neutron poison reaction rates. For the weak s-process, the main neutron source is the reaction {sup 22}Ne(?,n){sup 25}Mg, which is in competition with {sup 22}Ne(?,?){sup 26}Mg. The uncertainty of both rates strongly affects the nucleosynthesis predictions from stellar model calculations. In this study, we investigate the impact of the uncertainty in ?-captures on {sup 22}Ne on the s-process nucleosynthesis in massive stars both at solar and at very low metallicity. For this purpose, we post-process, with the Nugrid mppnp code, non-rotating and rotating evolutionary models 25M{sub ?} stars at two different metallicities: Z = Z{sub ?} and Z = 10{sup ?5}Z{sub ?}, respectively. Our results show that uncertainty of {sup 22}Ne(?,n){sup 25}Mg and {sup 22}Ne(?,?){sup 26}Mg rates have a significant impact on the final elemental production especially for metal poor rotating models. Beside uncertainties in the neutron source reactions, for fast rotating massive stars at low metallicity we revisit the impact of the neutron poisoning effect by the reaction chain {sup 16}O(n,?){sup 17}O(?,?){sup 21}Ne, in competition with the {sup 17}O(?,n){sup 20}Ne, recycling the neutrons captured by {sup 16}O.

Nishimura, N. [Astrophysics group, EPSAM, Keele University, Keele, ST5 1BH, UK and NuGrid Project (United Kingdom); Hirschi, R. [Astrophysics group, EPSAM, Keele University, Keele, ST5 1BH, UK and Kavli IPMU (WPI), University of Tokyo, Kashiwa, 277-8583 (Japan); Pignatari, M. [NuGrid Project and Department of Physics, University of Basel, Basel, CH-4056 (Switzerland); Herwig, F. [NuGrid Project and Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P5C2 (Canada); Beard, M. [NuGrid Project and Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Imbriani, G. [Dipartiment di Scienze Fisiche, Universita di Napoli Federico II, Napoli (Italy); Görres, J.; Boer, R. J. de; Wiescher, M. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States)

2014-05-02T23:59:59.000Z

489