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1

The Cost of Debt ?  

E-Print Network (OSTI)

We estimate firm-specific marginal cost of debt functions for a large panel of companies between 1980 and 2007. The marginal cost curves are identified by exogenous variation in the marginal tax benefits of debt. The location of a given company’s cost of debt function varies with characteristics such as asset collateral, size, book-to-market, asset tangibility, cash flows, and whether the firm pays dividends. By integrating the area between benefit and cost functions we estimate that the equilibrium net benefit of debt is 3.5 % of asset value, resulting from an estimated gross benefit of debt of 10.4 % of asset value and an estimated cost of debt of 6.9%. We find that the cost of being overlevered is asymmetrically higher than the cost of being underlevered and that expected default costs constitute approximately half of the total ex ante cost of debt. We thank Rick Green (the Acting Editor), and an anonymous referee, Heitor Almeida, Ravi Bansal,

Jules H. Van Binsbergen; John R. Graham; Jie Yang

2010-01-01T23:59:59.000Z

2

A formal approach to technical debt decision making  

Science Conference Proceedings (OSTI)

The notion of technical debt attracts significant attention, especially in the context of reconciling architecture and agile development. However, most work on technical debt is still largely informal and if it provides a formalization it is often ad-hoc. ... Keywords: Cost Estimation, Decision Making, Formal Model, Incremental Development, Software Systems, Technical Debt

Klaus Schmid

2013-06-01T23:59:59.000Z

3

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

4

Diesel prices remain fairly stable  

U.S. Energy Information Administration (EIA) Indexed Site

Diesel prices remain fairly stable The U.S. average retail price for on-highway diesel fuel slightly fell to 3.85 a gallon on Monday. That's down 6-tenths of a penny from a week...

5

Mortgage Debt Overhang: Reduced Investment by Homeowners with Negative Equity  

E-Print Network (OSTI)

[Do not cite without author’s permission] Homeowners with negative equity have less incentive to invest in their property. They face a debt overhang: in expectation, some value created by equity investments in the property will go to the lender. Using rich microdata on household expenditures, I show that debt overhang plays an important role in household financial decisions. I find that homeowners with negative equity cut back substantially on mortgage principal payments, home improvements and home maintenance spending. At the same time, these households show no difference in durable spending on automobiles, furniture and home appliances, investments that are not attached to the home. The decline in mortgage principal payments is particularly large for negative equity homeowners in non-recourse states, where strategic default is more likely because lenders have limited claim on non-housing wealth. Debt overhang, rather than financial constraints, best explains this set of facts. Given the prevalence of negative home equity in today’s housing market, the results suggest that home prices will grow more slowly in the future because of underinvestment. In addition, the potential deadweight loss due to home foreclosures is only part

Brian T. Melzer

2010-01-01T23:59:59.000Z

6

Bank for International Settlements European Central Bank International Monetary Fund Handbook on Securities Statistics – Second draft of part one: debt securities issuesSUMMARY  

E-Print Network (OSTI)

Section 2: Main features of debt securities........................................................................... 10 Section 3: Institutional units and sectors.............................................................................. 13 Section 4: Securitisation....................................................................................................... 20

unknown authors

2009-01-01T23:59:59.000Z

7

Distillate Stocks Expected to Remain Low  

Gasoline and Diesel Fuel Update (EIA)

8 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...

8

Distillate Stocks Expected to Remain Low  

U.S. Energy Information Administration (EIA)

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.

9

Los Alamos supercomputer remains fastest in world  

NLE Websites -- All DOE Office Websites (Extended Search)

world Los Alamos supercomputer remains fastest in world The latest list of the TOP500 computers in the world continued to place the Roadrunner supercomputer as fastest in the world...

10

Debt Composition and Balance Sheet Effect Of Currency Crisis in Indonesia1  

E-Print Network (OSTI)

1 Debt Composition and Balance Sheet Effect Of Currency Crisis in Indonesia1 Prepared by Agustinus condition in Indonesia. Therefore, even though currency depreciation is not related significantly to firm and Indonesia; despite some slowdown in growth in 1996, there was not a strong case that any of the countries

Paris-Sud XI, Université de

11

Debt swapping as a tool for economic and social stabilization in Russia's closed nuclear cities  

Science Conference Proceedings (OSTI)

The magnitude of Russian foreign debt, both official bilateral and commercial, compounded by collapse of the Russian economic system, is an obstacle in preventing the Russian Federation from effectively increasing the domestic priority of drawing down its nuclear weapons complex and providing a healthy, competitive environment to its nuclear cities. Debt-for-nature swaps, introduced in the early 1980s, provide debtor nations with a means of converting a portion of foreign debt into local currency, often at steep discounts, to use for purposes such as environmental protection that serve both a domestic and international need. This paper presents the debt-for-nature concept as a model for providing an infusion of funds to further U.S. and international nonproliferation objectives to help stabilize Russian closed city economic conditions through direct work on proliferation problems and remediation of the environment. A specific proposal is presented to demonstrate the utility and efficacy of the dept swap concept through initial collaboration with the city administration of Ozersk. The purpose of the proposal is to facilitate making Ozersk a safe, healthy competitive city, providing useful employment for its scientists and population and converting its superior infrastructure into productive activities.

JL Fuller; KM Leek

2000-03-08T23:59:59.000Z

12

Armament remains from His Majesty's sloop Boscawen  

E-Print Network (OSTI)

His Majesty's Sloop Boscawen was built on Lake Champlain by British forces in 1759 as part of their successful campaign to drive the French Army from the Champlain Valley. This thesis describes and analyzes the armament remains found in and around the hull during its excavation in 1984 and 1985. Weaponry recovered from Boscawen includes small arms parts and ammunition, pole arms, and artillery munitions. The distribution of armaments indicates that muskets, other personal weapons, and artillery munitions were loaded into the center of the hold, while ammunition for small arms was loaded in the bow and stern. Attributes of individual arms remains show that non-regulation British, French, and Dutch muskets were most commonly represented on board. The variety of arms remains and ammunition types supports Boscawen's historically documented use as an active combat ship in 1759 and as an armed transport for the Royal Artillery in 1760. A review of research reports on contemporary archaeological sites reveals serious deficiencies in the description and identification of weaponry from some sites. Additionally, the site reports generally do not consider the distribution of artifacts. A re-analysis of armament remains from Seven Years War sites would improve our understanding of how small arms and artillery were distributed on and among those sites.

Carter, Brinnen Stiles

1995-01-01T23:59:59.000Z

13

Higgs Production via Gluon-Induced Weak Boson Fusion  

E-Print Network (OSTI)

We present a calculation that allows for an estimation of the NNLO contributions to the Higgs production in the weak boson fusion channel. A possible deterioration of this important channel for the Higgs discoveries at the LHC can be ruled out by this calculation due to the small remaining cross section after the weak boson cuts.

Jens Vollinga

2008-09-22T23:59:59.000Z

14

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

15

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

16

Scope for Cost Minimization in Public Debt Management: the Case of the UK  

E-Print Network (OSTI)

constant. This formulation is a mirror image of the familiar efficient portfolio problem in finance. The risk parameter ? captures the relative weight attached by the debt manager to the interest cost volatility, and has a similar status as the risk... Metric estimator given by ?ˆt|t?1 = µ 1? ? 1? ?n ¶ nX j=1 ?j?1et?je0t?j , where et is the 2×1 vector of recursive forecast errors, ? is a decay coefficient and n is the size of the observation window. This estimator is used extensively in the professional finance...

Coe, Patrick J; Pesaran, M Hashem

2004-06-16T23:59:59.000Z

17

Weak Energy: Form and Function  

E-Print Network (OSTI)

The equation of motion for a time-independent weak value of a quantum mechanical observable contains a complex valued energy factor - the weak energy of evolution. This quantity is defined by the dynamics of the pre-selected and post-selected states which specify the observable's weak value. It is shown that this energy: (i) is manifested as dynamical and geometric phases that govern the evolution of the weak value during the measurement process; (ii) satisfies the Euler-Lagrange equations when expressed in terms of Pancharatnam (P) phase and Fubini-Study (FS) metric distance; (iii) provides for a PFS stationary action principle for quantum state evolution; (iv) time translates correlation amplitudes; (v) generalizes the temporal persistence of state normalization; and (vi) obeys a time-energy uncertainty relation. A similar complex valued quantity - the pointed weak energy of an evolving state - is also defined and several of its properties in PFS-coordinates are discussed. It is shown that the imaginary part of the pointed weak energy governs the state's survival probability and its real part is - to within a sign - the Mukunda-Simon geometric phase for arbitrary evolutions or the Aharonov-Anandan (AA) phase for cyclic evolutions. Pointed weak energy gauge transformations and the PFS 1-form are discussed and the relationship between the PFS 1-form and the AA connection 1-form is established.

Allen D. Parks

2013-04-09T23:59:59.000Z

18

Continuous Audit Implications on Internet Technology: Triggering Agents over the Web in the Domain of Debt Covenant Compliance  

Science Conference Proceedings (OSTI)

The Canadian Institute of Chartered Accountants and the American Institute of Certified Public Accountants have together called on the research community to show how continuous audit (CA) could be implemented in various auditing domains. In response ... Keywords: continuous audit, debt covenant, workflow, Cold Fusion

J. Woodroof; D. Searcy

2001-01-01T23:59:59.000Z

19

Case study: Improving debt collection processes using rule-based decision engines: A case study of Capital One  

Science Conference Proceedings (OSTI)

This case assesses the plethora of issues related to rule-based decision engine technology, and in particular, its role in complex and dynamic organizational processes. This paper argues rule-based engines can effectively be implemented for good organizational ... Keywords: Capital One, Debt collection, Project Edison, Rule-based decision, Rule-based engine

Amita Goyal Chin; Hiren Kotak

2006-02-01T23:59:59.000Z

20

Hand-Held Analyzer Quickly Detects Buried Human Remains  

A lightweight hand-held analyzer invented by ORNL researchers uses visual andauditory cues to quickly alert investigators to the presence of buried human remains.The Lightweight Analyzer for Buried Remains And Decomposition Odor Recognition(LABRADOR) ...

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

DOE removes all remaining HEU from Hungary | National Nuclear...  

National Nuclear Security Administration (NNSA)

NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > DOE removes all remaining HEU from Hungary DOE removes all remaining HEU...

22

US Removes Last Remaining HEU from Czech Republic, Sets Nonproliferati...  

National Nuclear Security Administration (NNSA)

Remaining HEU from Czech Republic, Sets Nonproliferation Milestone | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering...

23

Cobordisms to weakly splittable links  

E-Print Network (OSTI)

We show that if a link L with non-zero Alexander polynomial admits a locally flat cobordism to a `weakly m-split link', then the cobordism must have genus at least (m-1)/2. This generalises a recent result of J. Pardon.

Friedl, Stefan

2011-01-01T23:59:59.000Z

24

A Study on Remaining Useful Life Prediction for Prognostic Applications.  

E-Print Network (OSTI)

?? We consider the prediction algorithm and performance evaluation for prognostics and health management (PHM) problems, especially the prediction of remaining useful life (RUL) for… (more)

Liu, Gang

2011-01-01T23:59:59.000Z

25

A National Forum on Demand Response: Results on What Remains...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

26

A National Forum on Demand Response: Results on What Remains...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

27

Coal likely to remain most prevalent fuel for electricity ...  

U.S. Energy Information Administration (EIA)

Coal is currently the dominant fuel for electricity generation and is likely to remain so, even if additional environmental control regulations ...

28

US, International Partners Remove Last Remaining HEU from Vietnam...  

National Nuclear Security Administration (NNSA)

International Partners Remove Last Remaining HEU from Vietnam, Set Nuclear Security Milestone | National Nuclear Security Administration Our Mission Managing the Stockpile...

29

Renormalized weak plasma turbulence theory  

SciTech Connect

A renormalized Vlasov turbulence theory, derived by neglecting a mode coupling term in the Direct Interaction Approximation, is discussed. The theory reduces correctly to weak turbulence theory; it predicts both diffusion and polarization effects of the turbulent medium on test particles, as well as the inverse effects of the test particles on the medium. A heuristic, physical algorithm is presented for constructing the equations. The theory of the renormalized dielectric function is reviewed.

Krommes, J.A.; Kleva, R.G.

1979-02-01T23:59:59.000Z

30

On Amplification by Weak Measurement  

E-Print Network (OSTI)

We analyze the amplification by the Aharonov-Albert-Vaidman weak quantum measurement on a Sagnac interferometer [P. B. Dixon et al., Phys. Rev. Lett. 102, 173601 (2009)] up to all orders of the coupling strength between the measured system and the measuring device. The amplifier transforms a small tilt of a mirror into a large transverse displacement of the laser beam. The conventional analysis has shown that the measured value is proportional to the weak value, so that the amplification can be made arbitrarily large in the cost of decreasing output laser intensity. It is shown that the measured displacement and the amplification factor are in fact not proportional to the weak value and rather vanish in the limit of infinitesimal output intensity. We derive the optimal overlap of the pre- and post-selected states with which the amplification become maximum. We also show that the nonlinear effects begin to arise in the performed experiments so that any improvements in the experiment, typically with an amplification greater than 100, should require the nonlinear theory in translating the observed value to the original displacement.

Tatsuhiko Koike; Saki Tanaka

2011-08-09T23:59:59.000Z

31

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

32

United States, International Partners Remove Last Remaining Weapons-Usable  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

33

A National Forum on Demand Response: Results on What Remains...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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,...

34

A National Forum on Demand Response: Results on What Remains...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

35

ORISE: Study finds foreign doctorate recipients' stay rates remain...  

NLE Websites -- All DOE Office Websites (Extended Search)

in the United States remains high No evidence that visa restrictions are reducing stay rates, according to report FOR IMMEDIATE RELEASE Jan. 18, 2012 FY12-12 OAK RIDGE, Tenn.-The...

36

Biased Weak Polyform Achievement Games  

E-Print Network (OSTI)

In a biased weak $(a,b)$ polyform achievement game, the maker and the breaker alternately mark $a,b$ previously unmarked cells on an infinite board, respectively. The maker's goal is to mark a set of cells congruent to a polyform. The breaker tries to prevent the maker from achieving this goal. A winning maker strategy for the $(a,b)$ game can be built from winning strategies for games involving fewer marks for the maker and the breaker. A new type of breaker strategy called the priority strategy is introduced. The winners are determined for all $(a,b)$ pairs for polyiamonds and polyominoes up to size four.

Norris, Ian

2011-01-01T23:59:59.000Z

37

Electromagnetic weak turbulence theory revisited  

SciTech Connect

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

38

Quantum Weak Measurements and Cosmology  

E-Print Network (OSTI)

The indeterminism of quantum mechanics generally permits the independent specification of both an initial and a final condition on the state. Quantum pre-and-post-selection of states opens up a new, experimentally testable, sector of quantum mechanics, when combined with statistical averages of identical weak measurements. In this paper I apply the theory of weak quantum measurements combined with pre-and-post-selection to cosmology. Here, pre-selection means specifying the wave function of the universe or, in a popular semi-classical approximation, the initial quantum state of a subset of quantum fields propagating in a classical back-ground spacetime. The novel feature is post-selection: the additional specification of a condition on the quantum state in the far future. I discuss "natural" final conditions, and show how they may lead to potentially large and observable effects at the present cosmological epoch. I also discuss how pre-and-post-selected quantum contrast to the expectation value of the stress-energy-momentum tensor, resolving a vigorous debate from the 1970's. The paper thus provides a framework for computing large-scale cosmological effects arising from this new sector of quantum mechanics. A simple experimental test is proposed.

Paul Davies

2013-09-03T23:59:59.000Z

39

Oceanic Internal Waves Are Not Weak Waves  

Science Conference Proceedings (OSTI)

It is shown that the oceanic internal wave field is too energetic by roughly two orders of magnitude to be treated theoretically as an assemblage of weakly interacting waves. This may be seen both from recent weak wave theoretical calculations ...

Greg Holloway

1980-06-01T23:59:59.000Z

40

FAL 2006-04, Financial Assistance Letters Remaining in Effect  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

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

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

NLE Websites -- All DOE Office Websites (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

42

Remaining gross market potentials for the Central District  

SciTech Connect

The remaining gross market potential for the central district was studied for 28 power distributors. A special cross tabulation from the Bureau of the Census was used to develop a housing base from which work completions from the Revised Home Insulation Program (RHIP) data base could be subtracted. Key observations were: The largest percentage of remaining gross market potential for RHIP surveys lies in the service area of Nashville Electric Service (28.0%). Approximately 20% of the electrically heated and/or cooled living quarters have installed one or more measures under the Home Weatherization Option. In comparison to the number of RHIP surveys completed, 47.1% of the consumers went on to install one or more of the recommended weatherization measures. Only 1.6% of the occupied living quarters have installed a heat pump under the Heat Pump Option of RHIP. The district penetration rate for heat pump water heater installations in living quarters with existing electric water heaters is less than 0.005%. The largest percentage of remaining solar water heater installations is found in the Nashville Electric Service (NES) area (60.4%). Of the distributors that offered all 4 options in addition to the survey, NES had the highest overall average in performance and closures.

Camp, W.A.

1985-11-01T23:59:59.000Z

43

$?$ meson exchange effect on nonmesonic hypernuclear weak decay observables  

E-Print Network (OSTI)

We analyze the influence of $\\sigma$ meson exchange on the main nonmesonic hypernuclear weak decay observables: the total rate, $\\Gamma_{NM}$, the neutron-to-proton branching ratio, $\\Gamma_{n/p}$, and the proton asymmetry parameter, $a_\\Lambda$. The $\\sigma$ meson exchange is added to the standard strangeness-changing weak $\\Lambda N\\to NN$ transition potential, which includes the exchange of the complete pseudoscalar and vector mesons octet ($\\pi$, $\\eta$, $K$, $\\rho$, $\\omega$, $K^*$). Using a shell model formalism, the $\\sigma$ meson weak coupling constants are adjusted to reproduce the recent $\\Gamma_{NM}$ and $\\Gamma_{n/p}$ experimental data for $^5_{\\Lambda}He$. Numerical results for the remaining observables of $^5_{\\Lambda}He$ and all the observables of $^{12}_{\\Lambda}C$ decays are presented. They clearly show that the addition of the $\\sigma$ meson, in spite of improving some observables values, is not enough to reproduce simultaneously all the measurements, and the puzzle posed by the experimental data remains unexplained.

C. Barbero; A. Mariano

2005-09-15T23:59:59.000Z

44

Spin effects in the weak interaction  

SciTech Connect

Modern experiments investigating the beta decay of the neutron and light nuclei are still providing important constraints on the theory of the weak interaction. Beta decay experiments are yielding more precise values for allowed and induced weak coupling constants and putting constraints on possible extensions to the standard electroweak model. Here we emphasize the implications of recent experiments to pin down the strengths of the weak vector and axial vector couplings of the nucleon.

Freedman, S.J. (Argonne National Lab., IL (USA) Chicago Univ., IL (USA). Dept. of Physics Chicago Univ., IL (USA). Enrico Fermi Inst.)

1990-01-01T23:59:59.000Z

45

Remaining gross market potentials for the Appalachian District  

SciTech Connect

A survey provided a rank ordering of the 22 power distributors and each option's installations under the Revised Home Insulation Program (RHIP). A special cross tabulation from the Bureau of the Census was used to develop a housing base from which work completions from the RHIP data base could be subtracted. Key observations were: the largest percentage of remaining gross market potential for RHIP surveys lies in the service area of the Knoxville utilities Board (22.6%). Approximately 23% of the electrically heated and/or cooled living quarters have installed 1 or more measures under the Home Weatherization Option. In comparison to the number of RHIP surveys completed, 48.3% of the RHIP participants went on to install 1 or more of the recommended weatherization measures. Only 1.8% of the occupied living quarters have installed a heat pump under the Heat Pump Option of RHIP. The district penetration rate for heat pump water heater installation in living quarters with existing electric water heaters is 0.1%. The largest percentage of remaining solar water heater installations is found in the Knoxville Utilities Board's service area (43.3%). Of the distributors that offered all 4 options in addition to the survey, the municipality of Oak Ridge had the highest overall average in performance and closure.

Camp, W.A.

1985-11-01T23:59:59.000Z

46

Remaining gross market potentials for the Alabama District  

SciTech Connect

A survey provided a rank ordering of the 25 power distributors and each option's installations under the Revised Home Insulation Program (RHIP). A special cross tabulation from the Bureau of the Census was used to develop a housing base from which work completions from the RHIP data base could be subtracted. Key observations were: The largest percentage of remaining gross market potential for RHIP surveys lies in the service area of the City of Huntsville Utilities (22.0%). Approximately 34% of the electrically heated and/or cooled living quarters have installed one or more measures under the Home Weatherization Option. In comparison to the number of RHIP surveys completed, 77.3% of the consumers went on to install one or more of the recommended weatherization measures. Only 2.5% of the occupied living quarters have installed a heat pump under the Heat Pump Option of RHIP. The district penetration rate for heat pump water heater installations in living quarters with existing electric water heaters is less than 0.01%. The largest percentage of remaining solar water heater installations is found in the City of Huntsville Utilities service area (52.5%). Of the distributors that offered all 4 options in addition to the survey, the municipality of Sheffield had the highest overall average in performance and closure.

Camp, W.A.

1985-11-01T23:59:59.000Z

47

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

2009-09-04T23:59:59.000Z

48

Cosmic Gamma-Ray Bursts The Remaining Mysteries  

E-Print Network (OSTI)

To anyone who has read a scientific journal or even a newspaper in the last six months, it might appear that cosmic gamma-ray bursts hold no more mysteries: they are cosmological, and possibly the most powerful explosions in the Universe. In fact, however, bursts remain mysterious in many ways. There is no general agreement upon the nature of the event which releases the initial energy. One burst at least appears to strain the energy budget of the merging neutron star model. There is evidence that another recent event may have come from a nearby supernova. Finally, while the number count statistics clearly show a strong deviation from the -3/2 power law expected for a Euclidean, homogeneous distribution, the distributions of some classes of bursts appear to follow a -3/2 power law rather closely. The recent data on bursts is reviewed, some of the mysteries discussed, and future experiments are outlined.

Hurley, K

1998-01-01T23:59:59.000Z

49

EOR dips in U. S. but remains a significant factor  

Science Conference Proceedings (OSTI)

Based on the Journal's exclusive biennial enhanced oil recovery EOR survey including heavy oil projects, and other estimates, worldwide production from enhanced oil recovery projects at the start of 1994 remained about 1.9 million b/d or about the same as at the beginning of 1992. The 1.9 million b/d represents about 3.2% of the world's oil production. Although worldwide EOR production has hit a plateau, projects in the next few years in China, Alaska, Indonesia, Canada, Venezuela, and the US Permian basin might boos the production trend upward. The Journal's current survey found US EOR production decreased by 7%, to 709,000 bo/d. This production rate is still 10% of the overall US daily oil production. The percentage remained the same because between January 1992 and January 1994, total US oil production dropped almost 400,000 bo/d to 6.9 million b/d. Total US oil production is currently about 6.6 million bo/d. The number of US EOR projects has steadily decreased since 1986 but this is the first survey showing less production from EOR projects. Twelve tables compile data on the following: US EOR production; active US EOR projects; planned EOR projects, US and non-US; producing Canadian EOR projects; completed/terminated Canadian projects; producing EOR projects outside US and Canada, completed/terminated/postponed projects outside US and Canada; producing thermal EOR US projects; producing CO[sub 2] gas EOR US projects; producing chemical and microbial EOR US projects; completed/terminated/postponed/delayed US projects; and producing worldwide heavy oil EOR projects.

Moritis, G.

1994-09-26T23:59:59.000Z

50

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

51

On the Structure of Weakly Acyclic Games  

E-Print Network (OSTI)

The class of weakly acyclic games, which includes potential games and dominance-solvable games, captures many practical application domains. In a weakly acyclic game, from any starting state, there is a sequence of better-response moves that leads to a pure Nash equilibrium; informally, these are games in which natural distributed dynamics, such as better-response dynamics, cannot enter inescapable oscillations. We establish a novel link between such games and the existence of pure Nash equilibria in subgames. Specifically, we show that the existence of a unique pure Nash equilibrium in every subgame implies the weak acyclicity of a game. In contrast, the possible existence of multiple pure Nash equilibria in every subgame is insufficient for weak acyclicity in general; here, we also systematically identify the special cases (in terms of the number of players and strategies) for which this is sufficient to guarantee weak acyclicity.

Fabrikant, Alex; Schapira, Michael

2011-01-01T23:59:59.000Z

52

Shock Waves in Weakly Compressed Granular Media  

E-Print Network (OSTI)

We experimentally probe nonlinear wave propagation in weakly compressed granular media, and observe a crossover from quasi-linear sound waves at low impact, to shock waves at high impact. We show that this crossover grows with the confining pressure $P_0$, whereas the shock wave speed is independent of $P_0$ --- two hallmarks of granular shocks predicted recently. The shocks exhibit powerlaw attenuation, which we model with a logarithmic law implying that local dissipation is weak. We show that elastic and potential energy balance in the leading part of the shocks.

Siet van den Wildenberg; Rogier van Loo; Martin van Hecke

2013-04-23T23:59:59.000Z

53

Hall Magnetohydrodynamics of weakly-ionized plasma  

E-Print Network (OSTI)

We show that the Hall scale in a weakly ionized plasma depends on the fractional ionization of the medium and, Hall MHD description becomes important whenever the ion-neutral collision frequency is comparable to the ion-gyration frequency, or, the ion-neutral collisional mean free path is smaller than the ion gyro-radius. Wave properties of a weakly-ionized plasma also depends on the fractional ionization and plasma Hall parameters, and whistler mode is the most dominant mode in such a medium. Thus Hall MHD description will be important in astrophysical disks, dark molecular clouds, neutron star crusts, and, solar and planetary atmosphere.

B. P. Pandey; Mark Wardle

2006-08-01T23:59:59.000Z

54

Weak Solutions for Dislocation Type Equations  

E-Print Network (OSTI)

We describe recent results obtained by G. Barles, P. Cardaliaguet, R. Monneau and the author recently. They are concerned with nonlocal Eikonal equations arising in the study of the dynamics of dislocation lines in crystals. These equations are nonlocal but also non monotone. We use a notion of weak solution to provide solutions for all time. Then, we discuss the link between these weak solutions and the classical viscosity solutions, and state some uniqueness results in particular cases. A counter-example to uniqueness is given.

Ley, Olivier

2008-01-01T23:59:59.000Z

55

Higgs Boson Production and Weak Boson Structure  

E-Print Network (OSTI)

The influence of the QCD structure of the weak bosons on the Higgs boson production in $e$-$p$ scattering is studied. The energy and Higgs boson mass dependence of the cross-section, following from the new contributions, is calculated.

Wojciech Slominski; Jerzy Szwed

1995-07-18T23:59:59.000Z

56

Weak Viscoelastic Nematodynamics of Maxwell Type  

E-Print Network (OSTI)

A constitutive theory for weak viscoelastic nematodynamics of Maxwell type is developed using the standard local approach of non-equilibrium thermodynamics. Along with particular viscoelastic and nematic kinematics, the theory uses the weakly elastic potential proposed by de Gennes for nematic solids and the LEP constitutive equations for viscous nematic liquids, while ignoring the Frank (orientation) elasticity and inertia effects. In spite of many basic parameters, algebraic properties of nematic operations investigated in Appendix, allowed us to reveal a general group structure of the theory and present it in a simple form. It is shown that the evolution equation for director is also viscoelastic. An example of magnetization clarifies the situation with non-symmetric stresses. When the sources of stress asymmetry are absent, the theory is simplified and its relaxation properties are described by a symmetric subgroup of nematic algebraic operations. A purely linear constitutive behavior exemplifies the symmetric situation.

Arkady I. Leonov; Valery S. Volkov

2004-08-26T23:59:59.000Z

57

Quantal Definition of the Weak Equivalence Principle  

E-Print Network (OSTI)

The present work analyzes the meaning of the Weak Equivalence Principle in the context of quantum mechanics. A quantal definition for this principle is introduced. This definition does not require the concept of trajectory and relies upon the phase shift induced by a gravitational field in the context of a quantum interference experiment of two coherent beams of particles. In other words, it resorts to wave properties of the system and not to classical concepts as the idea of trajectory.

Abel Camacho; Arturo Camacho-Guardian

2008-11-03T23:59:59.000Z

58

Stopping power of weakly unstable plasmas  

SciTech Connect

An expression for the additional contribution to the stopping power of a weakly unstable plasma due to the modification of the beam--plasma collision operator by the presence of the unstable modes is derived and evaluated for a plasma with a flowing hot-electron tail, i.e., a bump-on-tail instability. It is found that the unstable plasma oscillations do not substantially alter the screening of the beam--plasma interaction.

Perez, J.D.; Payne, G.L.

1984-02-01T23:59:59.000Z

59

Summary of the Hadronic Weak Interaction session  

Science Conference Proceedings (OSTI)

We summarize and discuss present and future experiments on decays of light mesons and muons that were presented in the Hadronic Weak Interaction working group session of the ``Workshop on Future Directions in Particle and Nuclear Physics at Multi-GeV Hadron Facilities.`` Precise measurements and rare-decay searches, which sense mass scales in the 1--1000 TeV region, are discussed in the context of the standard model and beyond.

Bock, G. [Fermi National Accelerator Lab., Batavia, IL (United States); Bryman, D.A.; Numao, T. [British Columbia Univ., Vancouver, BC (Canada). TRIUMF Facility

1993-07-01T23:59:59.000Z

60

Heat capacity in weakly correlated liquids  

Science Conference Proceedings (OSTI)

Previously unavailable numerical data related to the heat capacity in two- and three-dimensional liquid Yukawa systems are obtained by means of fluctuation theory. The relations between thermal conductivity and diffusion constants are numerically studied and discussed. New approximation for heat capacity dependence on non-ideality parameter for weakly correlated systems of particles is proposed. Comparison of the obtained results to the existing theoretical and numerical data is discussed.

Khrustalyov, Yu. V.; Vaulina, O. S. [Joint Institute for High Temperatures RAS, 125412, Izhorskaya St., 13 bld.2, Moscow (Russian Federation); Moscow Institute of Physics and Technology, 117303, Kerchenskaya St., 1A bld.1, Moscow (Russian Federation); Koss, X. G. [Joint Institute for High Temperatures RAS, 125412, Izhorskaya St., 13 bld.2, Moscow (Russian Federation)

2012-12-15T23:59:59.000Z

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.


61

Higgs Quantum Numbers in Weak Boson Fusion  

E-Print Network (OSTI)

Recently, the ATLAS and CMS experiments have reported the discovery of a Higgs like resonance at the LHC. The next analysis step will include the determination of its spin and CP quantum numbers or the form of its interaction Lagrangian channel-by-channel. We show how weak-boson-fusion Higgs production and associated ZH production can be used to separate different spin and CP states.

C. Englert; D. Goncalves-Netto; K. Mawatari; T. Plehn

2012-12-04T23:59:59.000Z

62

Supersymmetric Higgs Bosons in Weak Boson Fusion  

E-Print Network (OSTI)

We compute the complete supersymmetric next-to-leading order corrections to the production of a light Higgs boson in weak boson fusion. The size of the electroweak corrections is of similar order as the next-to-leading order corrections in the Standard Model. The supersymmetric QCD corrections turn out to be significantly smaller than their electroweak counterparts. These higher--order corrections are an important ingredient to a precision analysis of the (supersymmetric) Higgs sector at the LHC, either as a known correction factor or as a contribution to the theory error.

W. Hollik; T. Plehn; M. Rauch; H. Rzehak

2008-04-17T23:59:59.000Z

63

Bayesian Photometric Redshifts for Weak Lensing Applications  

E-Print Network (OSTI)

The next generation of weak gravitational lensing surveys is capable of generating good measurements of cosmological parameters, provided that, amongst other requirements, adequate redshift information is available for the background galaxies that are measured. It is frequently assumed that photometric redshift techniques provide the means to achieve this. Here we compare Bayesian and frequentist approaches to photometric redshift estimation, particularly at faint magnitudes. We identify and discuss the biases that are inherent in the various methods, and describe an optimum Bayesian method for extracting redshift distributions from photometric data.

Edward Edmondson; Lance Miller; Christian Wolf

2006-07-13T23:59:59.000Z

64

Steven Weinberg, Weak Interactions, and Electromagnetic Interactions  

NLE Websites -- All DOE Office Websites (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.

65

Weak gravitational lensing as a method to constrain unstable dark matter  

SciTech Connect

The nature of the dark matter remains a mystery. The possibility of an unstable dark matter particle decaying to invisible daughter particles has been explored many times in the past few decades. Meanwhile, weak gravitational lensing shear has gained a lot of attention as a probe of dark energy, though it was previously considered a dark matter probe. Weak lensing is a useful tool for constraining the stability of the dark matter. In the coming decade a number of large galaxy imaging surveys will be undertaken and will measure the statistics of cosmological weak lensing with unprecedented precision. Weak lensing statistics are sensitive to unstable dark matter in at least two ways. Dark matter decays alter the matter power spectrum and change the angular diameter distance-redshift relation. We show how measurements of weak lensing shear correlations may provide the most restrictive, model-independent constraints on the lifetime of unstable dark matter. Our results rely on assumptions regarding nonlinear evolution of density fluctuations in scenarios of unstable dark matter and one of our aims is to stimulate interest in theoretical work on nonlinear structure growth in unstable dark matter models.

Wang Meiyu; Zentner, Andrew R. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)

2010-12-15T23:59:59.000Z

66

Weak Pressure Gradient Approximation and Its Analytical Solutions  

Science Conference Proceedings (OSTI)

A weak pressure gradient (WPG) approximation is introduced for parameterizing supradomain-scale (SDS) dynamics, and this method is compared to the relaxed form of the weak temperature gradient (WTG) approximation in the context of 3D, linearized, ...

David M. Romps

2012-09-01T23:59:59.000Z

67

Numerical Tests of the Weak Pressure Gradient Approximation  

Science Conference Proceedings (OSTI)

Cloud-resolving simulations of convection over a surface temperature hot spot are used to evaluate the weak pressure gradient (WPG) and weak temperature gradient (WTG) approximations. The premise of the relaxed form of WTG—that vertical velocity ...

David M. Romps

2012-09-01T23:59:59.000Z

68

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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...

69

Medical Examiner/Coroner on the Handling of a Body/Human Remains...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Medical ExaminerCoroner on the Handling of a BodyHuman Remains that are Potentially Radiologically Contaminated Medical ExaminerCoroner on the Handling of a BodyHuman Remains...

70

Fatigue Weak-Link Density and Strength Distribution in High ...  

Science Conference Proceedings (OSTI)

Symposium, Fatigue and Corrosion Damage in Metallic Materials: Fundamentals, Modeling and Prevention. Presentation Title, Fatigue Weak-Link Density and ...

71

Prospects for Multiple Weak Gauge Boson Production at Supercollider Energies  

E-Print Network (OSTI)

We discuss the prospects for observing multiple weak gauge boson production at the SSC and LHC. We summarize conventional perturbative cross sections for processes involving 1-6 final state weak gauge bosons and compare them with more speculative scenarios including 1) a toy model of a strongly interacting Higgs sector patterned after hadronic multipion production and 2) the nonperturbative production of O(30) weak gauge bosons in a weakly coupled gauge sector.

D. A. Morris

1993-08-24T23:59:59.000Z

72

Using Remaining Battery lifetime information and Relaying to decrease Outage Probability of a Mobile  

E-Print Network (OSTI)

Using Remaining Battery lifetime information and Relaying to decrease Outage Probability is to demonstrate that by employing relaying and using the remaining battery lifetime information of Mobile is determined based on the remaining battery lifetime of the MT. We assume a linear relationship between

Singh, Suresh

73

Composite Weak Bosons at the Large Hadron Collider  

E-Print Network (OSTI)

In a composite model of the weak bosons the excited bosons, in particular the p-wave bosons, are studied. The state with the lowest mass is identified with the boson, which has been discovered recently at the "Large Hadron Collider" at CERN. Specific properties of the excited weak bosons are studied, in particular their decays into weak bosons and into photons.

Harald Fritzsch

2013-07-24T23:59:59.000Z

74

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 approx- imate 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 experi- ments 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.

Ammari, Habib; Garnier, Josselin

2012-01-01T23:59:59.000Z

75

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

76

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

77

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

78

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

79

Atomic Inference from Weak Gravitational Lensing Data  

SciTech Connect

We present a novel approach to reconstructing the projected mass distribution from the sparse and noisy weak gravitational lensing shear data. The reconstructions are regularized via the knowledge gained from numerical simulations of clusters, with trial mass distributions constructed from n NFW profile ellipsoidal components. The parameters of these ''atoms'' are distributed a priori as in the simulated clusters. Sampling the mass distributions from the atom parameter probability density function allows estimates of the properties of the mass distribution to be generated, with error bars. The appropriate number of atoms is inferred from the data itself via the Bayesian evidence, and is typically found to be small, reecting the quality of the data. Ensemble average mass maps are found to be robust to the details of the noise realization, and succeed in recovering the demonstration input mass distribution (from a realistic simulated cluster) over a wide range of scales. As an application of such a reliable mapping algorithm, we comment on the residuals of the reconstruction and the implications for predicting convergence and shear at specific points on the sky.

Marshall, Phil; /KIPAC, Menlo Park

2005-12-14T23:59:59.000Z

80

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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, andor...

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

An Analytical Model for Predicting the Remaining Battery Capacity of Lithium-Ion Batteries  

E-Print Network (OSTI)

An Analytical Model for Predicting the Remaining Battery Capacity of Lithium-Ion Batteries Peng cycle-life tends to shrink significantly. The capacities of commercial lithium-ion batteries fade by 10 prediction model to estimate the remaining capacity of a Lithium-Ion battery. The proposed analytical model

Pedram, Massoud

82

PREDICTION OF REMAINING LIFE OF POWER TRANSFORMERS BASED ON LEFT TRUNCATED AND RIGHT  

E-Print Network (OSTI)

, for the overall fleet of transformers. 1. Introduction. 1.1. Background. Electrical transmission is an important. The prediction of the remaining life can be based on historical lifetime information about the transformer the remaining life of the healthy individual transformers in their fleet and the rate at which

83

An artificial neural network method for remaining useful life prediction of equipment subject to condition monitoring  

Science Conference Proceedings (OSTI)

Accurate equipment remaining useful life prediction is critical to effective condition based maintenance for improving reliability and reducing overall maintenance cost. In this paper, an artificial neural network (ANN) based method is developed for ... Keywords: Accurate, Artificial neural network, Bearing, Prediction, Remaining useful life

Zhigang Tian

2012-04-01T23:59:59.000Z

84

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

85

Phase estimation with weak measurement using a white light source  

E-Print Network (OSTI)

We report results of a high precision phase estimation based on a weak measurements scheme using commercial light-emitting diode. The method is based on a measurement of the imaginary part of the weak value of a polarization operator. The imaginary part of the weak value appeared due to the measurement interaction itself. The sensitivity of our method is equivalent to resolving light pulses of order of attosecond and it is robust against chromatic dispersion.

Xiao-Ye Xu; Yaron Kedem; Kai Sun; Lev Vaidman; Chuan-Feng Li; Guang-Can Guo

2013-06-20T23:59:59.000Z

86

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

87

Interaction between Lattice Dislocation and Weak Interface in ...  

Science Conference Proceedings (OSTI)

We studied the interaction between lattice dislocations and weak interfaces in anisotropic bi-layer composites by using the Green's function method.

88

ElectroWeak theory after the first LHC phase  

E-Print Network (OSTI)

I summarize the status of the ElectroWeak Interactions after the first phase of the Large Hadron Collider and I give an outlook on its possible developments.

Riccardo Barbieri

2013-09-13T23:59:59.000Z

89

ElectroWeak theory after the first LHC phase  

E-Print Network (OSTI)

I summarize the status of the ElectroWeak Interactions after the first phase of the Large Hadron Collider and I give an outlook on its possible developments.

Barbieri, Riccardo

2013-01-01T23:59:59.000Z

90

Distillate Stocks Expected to Remain Low - U.S. Energy Information ...  

U.S. Energy Information Administration (EIA)

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.

91

Italy makes U-turn on nuclear power, but hurdles remain  

SciTech Connect

A consortium consisting of ENEL and EDF in partnership with others including Edison, a major generator, and possibly a number of heavy industrial electricity users could invest in nuclear plants. But many technical, political, regulatory, and financial hurdles remain.

NONE

2009-05-15T23:59:59.000Z

92

Constraints on Dark Energy Models from Weak Gravity Conjecture  

E-Print Network (OSTI)

We study the constraints on the dark energy model with constant equation of state parameter $w=p/\\rho$ and the holographic dark energy model by using the weak gravity conjecture. The combination of weak gravity conjecture and the observational data gives $wenergy model realized by a scalar field is in swampland.

Chen, Ximing; Gong, Yungui

2008-01-01T23:59:59.000Z

93

Constraints on Dark Energy Models from Weak Gravity Conjecture  

E-Print Network (OSTI)

We study the constraints on the dark energy model with constant equation of state parameter $w=p/\\rho$ and the holographic dark energy model by using the weak gravity conjecture. The combination of weak gravity conjecture and the observational data gives $wenergy model realized by a scalar field is in swampland.

Ximing Chen; Jie Liu; Yungui Gong

2008-06-15T23:59:59.000Z

94

The Perturbative Onset of Multiparticle Production in Weak Interactions  

E-Print Network (OSTI)

We use perturbation theory to estimate the energy scale beyond which multiparticle final states become a dominant feature of high energy weak interactions. Using estimates from a weak parton model and comparing two, three and four body final states we deduce that multiparticle states become important at energy scales in the range 10**7 - 10**9 GeV.

D. A. Morris; R. Rosenfeld

1992-10-19T23:59:59.000Z

95

Processing on Information Fusion of Weak Electrical Signals in Plants  

Science Conference Proceedings (OSTI)

Information transmission of weak electrical signals in Bellis perennis was inosculated by a touching test system of self-made double shields with platinum sensors. Tested data of electrical signals denoised by the wavelet soft threshold and using Gaussian ... Keywords: intelligent control, information fusion, RBF neural networks, wavelet soft threshold denoising, weak electrical signal, Bellis perennis

Lanzhou Wang; Jinli Ding

2010-06-01T23:59:59.000Z

96

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

97

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

98

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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."

99

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

100

Device indicating the time remaining of the useful life of a battery  

SciTech Connect

A device is described for a battery in open circuit condition measuring in increments of time, the remaining useful life of a storage battery to the point of full discharge where the battery is used as a prime source of power, having in combination a series circuit connected in parallel to a storage battery in an open circuit condition, means included in the series circuit indicating the entire useful range of the open circuit voltage excursion of the battery on a full scale in increments of time, and the means including means indicating in increments of time the remaining useful life of the battery for any particular use.

Smith, L.S.

1986-11-25T23:59:59.000Z

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.


101

{sigma} meson exchange effect on non-mesonic hypernuclear weak decay observables  

Science Conference Proceedings (OSTI)

We analyze the influence of {sigma} meson exchange on the main non-mesonic hypernuclear weak decay observables: Total rate {gamma}{sub NM}, neutron-to-proton branching ratio {gamma}{sub n/p}, and proton asymmetry parameter a{sub {lambda}}. The {sigma} meson exchange is added to the standard strangeness-changing weak {lambda}N{yields}NN transition potential, which includes the exchange of the complete pseudoscalar and vector mesons octet ({pi},{eta},K,{rho},{omega},K{sup *}). Using a shell model formalism, the {sigma} meson weak coupling constants are adjusted to reproduce the recent {gamma}{sub NM} and {gamma}{sub n/p} experimental data for {sub {lambda}}{sup 5}He. Numerical results for the remaining observables of {sub {lambda}}{sup 5}He and all the observables of {sub {lambda}}{sup 12}C decays are presented. They clearly show that the addition of the {sigma} meson improves the agreement with the data. However, its effect it is not enough to reproduce well the a{sub {lambda}} values, which means that other improvements of the model must be explored to explain the puzzle posed by the experiments.

Barbero, C.; Mariano, A. [Departamento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 67, 1900 La Plata (Argentina)

2006-02-15T23:59:59.000Z

102

Determining the Remaining Strength of Pitting Corrosion in Corroded Pipelines with API579 Criterion  

Science Conference Proceedings (OSTI)

Because the long-distance oil and gas pipelines have buried underground in a long term, there is corrosion on the inside and outside surfaces of pipeline, which can cause serious hole leaking accident, and bring the huge economic losses. In order to ... Keywords: API579 criterion, remaining strength, pipeline corrosion, pitting corrosion, evaluation system

Song-wei Gao; Bo Gao; Li-jian Yang

2011-10-01T23:59:59.000Z

103

An analytical model for predicting the remaining battery capacity of lithium-ion batteries  

Science Conference Proceedings (OSTI)

Predicting the residual energy of the battery source that powers a portable electronic device is imperative in designing and applying an effective dynamic power management policy for the device. This paper starts up by showing that a 30% error in predicting ... Keywords: accelerated rate capacity, cycle aging and dynamic voltage scaling, remaining battery capacity, temperature

Peng Rong; Massoud Pedram

2006-05-01T23:59:59.000Z

104

`TVLSI-00029-2003.R1 An Analytical Model for Predicting the Remaining Battery  

E-Print Network (OSTI)

`TVLSI-00029-2003.R1 1 An Analytical Model for Predicting the Remaining Battery Capacity of Lithium-Ion Batteries Peng Rong, Student Member, IEEE and Massoud Pedram, Fellow, IEEE Abstract -- Predicting the residual energy of the battery source that powers a portable electronic device is imperative in designing

Pedram, Massoud

105

Estimating the Remaining Useful Life of Residential Cory Welch and Brad Rogers, Navigant Consulting, Inc.  

E-Print Network (OSTI)

Estimating the Remaining Useful Life of Residential Appliances Cory Welch and Brad Rogers, Navigant. This paper describes a methodology for estimating the RUL of residential technologies using mortality data is that Weibull shape factors for many residential appliances were found to fall within a tight range

106

World supplies of rapeseed and canola likely to remain tight in the 2012/13 season  

Science Conference Proceedings (OSTI)

Even if Canadian farmers harvest a record canola crop of 14.5–15.0 million metric tons (MMT) in late summer 2012, there is a high probability that world production of rapeseed and canola will remain behind requirements in the 2012/13 season—mainly due to p

107

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

108

Violation of the Weak Equivalence Principle in Bekenstein's theory  

E-Print Network (OSTI)

Bekenstein has shown that violation of Weak Equivalence Principle is strongly supressed in his model of charge variation. In this paper, it is shown that nuclear magnetic energy is large enough to produce observable effects in Eotvos experiments.

L. Kraiselburd; H. Vucetich

2009-02-24T23:59:59.000Z

109

Multiscale Large Eddy States in Weakly Stratified Planetary Boundary Layers  

Science Conference Proceedings (OSTI)

We first discuss observations of two classes of two-dimensional large eddy states in weakly stratified atmospheric boundary layers. One class is characterized by large eddies with a single horizontal scale. The other contains multiscale large ...

Pierre D. Mourad; Robert A. Brown

1990-02-01T23:59:59.000Z

110

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

not checked realm values were not checked the server secret was hard-coded to a known string The result of these weaknesses is that DIGEST authentication was only as secure as...

111

DISCIPLE-1: interactive apprentice system in weak theory fields  

Science Conference Proceedings (OSTI)

The paper presents an interactive approach to learning apprentice systems for weak theory domains. The approach consists of a combination of teaming by analogy and learning by generalizing instances. One main point of this approach is that it uses the ...

Yves Kodratoff; Gheorghe Tecuci

1987-08-01T23:59:59.000Z

112

Corbino-geometry Josephson weak links in thin superconducting films  

Science Conference Proceedings (OSTI)

I consider a Corbino-geometry superconducting-normal-superconducting Josephson weak link in a thin superconducting film, in which current enters at the origin, flows outward, passes through an annular Josephson weak link, and leaves radially. In contrast to sandwich-type annular Josephson junctions, in which the gauge-invariant phase difference obeys the sine-Gordon equation, here the gauge-invariant phase difference obeys an integral equation. I present exact solutions for the gauge-invariant phase difference across the weak link when it contains an integral number N of Josephson vortices and the current is zero. I then study the dynamics when a current is applied, and I derive the effective resistance and the viscous drag coefficient; I compare these results with those in sandwich-type junctions. I also calculate the critical current when there is no Josephson vortex in the weak link but there is a Pearl vortex nearby.

Clem, John R.

2010-11-29T23:59:59.000Z

113

Boils and Turbulence in a Weakly Stratified Shallow Tidal Sea  

Science Conference Proceedings (OSTI)

Measurements of turbulence are made in a weakly but variably stratified region of tidal straining in the eastern Irish Sea using turbulence sensors profiling vertically through the water column on the Fast Light Yo-yo (FLY) profiler and ...

S. A. Thorpe; J. A. M. Green; J. H. Simpson; T. R. Osborn; W. A. M. Nimmo Smith

2008-08-01T23:59:59.000Z

114

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

115

Weak and strong regimes of incompressible magnetohydrodynamic turbulence  

Science Conference Proceedings (OSTI)

It is shown that in the framework of the weak turbulence theory, the autocorrelation and cascade time scales are always of the same order of magnitude. This means that, contrary to the general belief, any model of turbulence that implies a large number of collisions among wave packets for an efficient energy cascade (such as the Iroshnikov-Kraichnan model) is not compatible with the weak turbulence theory.

Gogoberidze, G. [Centre for Plasma Astrophysics, K. U. Leuven, Celestijnenlaan 200B, 3001 Leuven (Belgium); Georgian National Astrophysical Observatory, 2a Kazbegi Ave., 0160 Tbilisi, Georgia (United States); Mahajan, S. M. [Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712 (United States); Poedts, S. [Centre for Plasma Astrophysics, K. U. Leuven, Celestijnenlaan 200B, 3001 Leuven (Belgium)

2009-07-15T23:59:59.000Z

116

Weak rigidity in almost-thermodynamic material schemes  

SciTech Connect

To avoid the restrictions that the Born rigidity supposes for the motions in relativity, the definition of a weakly rigid almost-thermodynamic material scheme is proposed. From it the relativistic incompressibility condition given by Ferrando and Olivert is obtained. Moreover, it is proved that, for the weakly rigid irrotational and geodesic almost-thermodynamic material schemes, the scalar curvature of the Landau manifolds is constant along the streamlines.

del Olmo, V.; Olivert, J.

1985-06-01T23:59:59.000Z

117

Weak coupling limits in a stochastic model of heat conduction  

E-Print Network (OSTI)

We study the Brownian momentum process, a model of heat conduction, weakly coupled to heat baths. In two different settings of weak coupling to the heat baths, we study the non-equilibrium steady state and its proximity to the local equilibrium measure in terms of the strength of coupling. For three and four site systems, we obtain the two-point correlation function and show it is generically not multilinear.

Redig, Frank

2011-01-01T23:59:59.000Z

118

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

119

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

SciTech Connect

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

120

An analytical model for predicting the remaining battery capacity of lithium-ion batteries  

E-Print Network (OSTI)

Abstract—Predicting the residual energy of the battery source that powers a portable electronic device is imperative in designing and applying an effective dynamic power management policy for the device. This paper starts up by showing that a 30 % error in predicting the battery capacity of a lithium-ion battery can result in up to 20 % performance degradation for a dynamic voltage and frequency scaling algorithm. Next, this paper presents a closed form analytical expression for predicting the remaining capacity of a lithium-ion battery. The proposed high-level model, which relies on online current and voltage measurements, correctly accounts for the temperature and cycle aging effects. The accuracy of the highlevel model is validated by comparing it with DUALFOIL simulation results, demonstrating a maximum of 5 % error between simulated and predicted data. Index Terms—Accelerated rate capacity, cycle aging and dynamic voltage scaling, remaining battery capacity, temperature. I.

Peng Rong; Student Member; Massoud Pedram

2003-01-01T23:59:59.000Z

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.


121

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

122

Method and apparatus to predict the remaining service life of an operating system  

DOE Patents (OSTI)

A method and computer-based apparatus for monitoring the degradation of, predicting the remaining service life of, and/or planning maintenance for, an operating system are disclosed. Diagnostic information on degradation of the operating system is obtained through measurement of one or more performance characteristics by one or more sensors onboard and/or proximate the operating system. Though not required, it is preferred that the sensor data are validated to improve the accuracy and reliability of the service life predictions. The condition or degree of degradation of the operating system is presented to a user by way of one or more calculated, numeric degradation figures of merit that are trended against one or more independent variables using one or more mathematical techniques. Furthermore, more than one trendline and uncertainty interval may be generated for a given degradation figure of merit/independent variable data set. The trendline(s) and uncertainty interval(s) are subsequently compared to one or more degradation figure of merit thresholds to predict the remaining service life of the operating system. The present invention enables multiple mathematical approaches in determining which trendline(s) to use to provide the best estimate of the remaining service life.

Greitzer, Frank L. (Richland, WA); Kangas, Lars J. (West Richland, WA); Terrones, Kristine M. (Los Alamos, NM); Maynard, Melody A. (Richland, WA); Pawlowski, Ronald A. (West Richland, WA), Ferryman; Thomas A. (Richland, WA); Skorpik, James R. (Kennewick, WA); Wilson, Bary W. (Coconut Creek, FL)

2008-11-25T23:59:59.000Z

123

Technical advantages for weak value amplification: When less is more  

E-Print Network (OSTI)

The technical merits of weak value amplification techniques are analyzed. We consider models of several different types of technical noise in an optical context and show that weak value amplification techniques (which only use a small fraction of the photons) compare favorably with standard techniques (which uses all of them). Using the Fisher information metric, we demonstrate that weak value techniques can put all of the Fisher information about the detected parameter into a small portion of the events and show how this fact alone gives technical advantages. We go on to consider a time correlated noise model, and find that a Fisher information analysis indicates that while the standard method can have much larger information about the detected parameter than the postselected technique. However, the estimator needed to gather the information is technically difficult to implement, showing that the inefficient (but practical) signal-to-noise estimation of the parameter is usually superior. We also describe other technical advantages unique to imaginary weak value amplification techniques, focusing on beam deflection measurements. In this case, we discuss combined noise types (such as detector transverse jitter, angular beam jitter before the interferometer and turbulence) for which the interferometric weak value technique gives higher Fisher information over conventional methods. We go on to calculate the Fisher information of the recently proposed photon recycling scheme for beam deflection measurements, and show it further boosts the Fisher information by the inverse postselection probability relative to the standard measurement case.

Andrew N. Jordan; Julián Martínez-Rincón; John C. Howell

2013-09-19T23:59:59.000Z

124

Malaria Researchers Find Weakness in Global Killer | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

125

Gravitational Interaction of Higgs Boson and Weak Boson Scattering  

E-Print Network (OSTI)

With the LHC discovery of a 125 GeV Higgs-like boson, we study gravitational interaction of the Higgs boson via the unique dimension-4 operator involving Higgs doublet and scalar curvature, $\\,\\xi H^\\dag H R\\,$, with nonminimal coupling $\\,\\xi\\,$. This Higgs portal term can be transformed away in Einstein frame and induces gauge-invariant effective interactions in the Higgs sector. We study the weak boson scattering in Einstein frame, and explicitly demonstrate the longitudinal-Goldstone boson equivalence theorem in the presence of $\\,\\xi\\,$ coupling. With these, we derive unitarity bound on the Higgs gravitational coupling $\\,\\xi\\,$ in Einstein frame, which is stronger than that inferred from the current LHC Higgs measurements. We further study $\\xi$-dependent weak boson scattering cross sections at TeV scale, and propose a new LHC probe of the Higgs-gravity coupling $\\,\\xi\\,$ via weak boson scattering experiments.

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

2013-05-01T23:59:59.000Z

126

Role of Weak Ties in Link Prediction of Complex Networks  

E-Print Network (OSTI)

Plenty of algorithms for link prediction have been proposed and were applied to various real networks. Among these works, the weights of links are rarely taken into account. In this paper, we use local similarity indices to estimate the likelihood of the existence of links in weighted networks, including Common Neighbor, Adamic-Adar Index, Resource Allocation Index, and their weighted versions. In both the unweighted and weighted cases, the resource allocation index performs the best. To our surprise, the weighted indices perform worse, which reminds us of the well-known Weak Tie Theory. Further extensive experimental study shows that the weak ties play a significant role in the link prediction problem, and to emphasize the contribution of weak ties can remarkably enhance the predicting accuracy.

Lu, Linyuan

2009-01-01T23:59:59.000Z

127

Mechanical and acoustic properties of weakly cemented granular rocks  

SciTech Connect

This paper presents the results of laboratory measurements on the mechanical and acoustic properties of weakly cemented granular rock. Artificial rock samples were fabricated by cementing sand and glass beads with sodium silicate binder. During uniaxial compression tests, the rock samples showed stress-strain behavior which was more similar to that of soils than competent rocks, exhibiting large permanent deformations with frictional slip. The mechanical behavior of the samples approached that of competent rocks as the amount of binder was increased. For very weak samples, acoustic waves propagating in these rocks showed very low velocities of less than 1000 m/sec for compressional waves. A borehole made within this weakly cemented rock exhibited a unique mode of failure that is called ''anti-KI mode fracture'' in this paper. The effect of cementation, grain type, and boundary conditions on this mode of failure was also examined experimentally.

Nakagawa, S.; Myer, L.R.

2001-05-09T23:59:59.000Z

128

QCD Corrections to Jet Correlations in Weak Boson Fusion  

E-Print Network (OSTI)

Higgs boson production via weak boson fusion is sensitive to the tensor structure of the HVV (V=W,Z) couplings, which distinguishes loop induced vertices from SM expectations. At the CERN Large Hadron Collider this information shows up most clearly in the azimuthal angle correlations of the two forward and backward quark jets which are typical for weak boson fusion. We calculate the next-to-leading order QCD corrections to this process, in the presence of anomalous HVV couplings. Gluon emission does not significantly change the azimuthal jet correlations.

Terrance Figy; Dieter Zeppenfeld

2004-03-30T23:59:59.000Z

129

Algebraic Definition of weak ($\\infty$; n)-Categories.  

E-Print Network (OSTI)

In this paper we define a sequence of monads $\\mathbb{T}^(\\infty;n)$ $(n\\in\\mathbb{N})$ on $\\infty$-$\\mathbb{G}\\text{r}$, the category of the $\\infty$-graphs. We conjecture that algebras for $\\mathbb{T}^(0;n)$ which are defined in a purely algebraic setting, are models of weak $\\infty$-groupoids. And for all $n>1$ we conjecture that algebras for $\\mathbb{T}^(\\infty;n)$ which are defined in a purely algebraic setting, are models of weak $(\\infty; n)$-categories.

Camell Kachour

130

A Chemical Potential 'Battery' for Superfluid 4He Weak Links  

Science Conference Proceedings (OSTI)

Research and development of superfluid weak links has been hindered by the absence of a source of dc chemical potential, similar to a simple battery or voltage source for analogous superconducting devices. We describe here a method for generating a dc chemical potential difference, {delta}{mu} across a weak link array in superfluid 4He. The presence of a {delta}{mu} forces quantum oscillations at a Josephson frequency, selectable by the adjustment of input power to a heater. We discuss a case in which the frequency locks onto a resonance feature where it exhibits remarkable stability, and amplitude magnification by a factor of 40.

Hoskinson, E.; Sato, Y.; Packard, R. E. [Department of Physics, University of California, Berkeley, CA 94720 (United States); Penanen, K. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

2006-09-07T23:59:59.000Z

131

Persistent Currents in the Heisenberg chain with a weak link  

E-Print Network (OSTI)

The Heisenberg chain with a weak link is studied, as a simple example of a quantum ring with a constriction or defect. The Heisenberg chain is equivalent to a spinless electron gas under a Jordan-Wigner transformation. Using density matrix renormalization group and quantum Monte Carlo methods we calculate the spin/charge stiffness of the model, which determines the strength of the ‘persistent currents’. The stiffness is found to scale to zero in the weak link case, in agreement with renormalization group arguments of Eggert and Affleck, and Kane and Fisher.

T. M. R. Byrnes; R. J. Bursill; H. -p. Eckle; C. J. Hamer; A. W. Sandvik

2002-01-01T23:59:59.000Z

132

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

133

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

134

Why does Low-Luminosity AGN Fueling Remain an Unsolved Problem?  

E-Print Network (OSTI)

Despite many years of effort, observational studies have not found a strong correlation between the presence of any proposed fueling mechanism and low-luminosity AGN. After a discussion of the mass requirements for fueling, I summarize this observational work and provide a number of hypotheses for why the nature of AGN fueling has remained unresolved. In particular, I stress the potential importance of the increasing number of candidate fueling mechanisms with decreasing mass accretion rate, the relevant spatial scales for different fueling mechanisms, and the lifetime of an individual episode of nuclear accretion. The episodic AGN lifetime is a particularly relevant complication if it is comparable to or shorter than the time that the responsible fueling mechanisms are observationally detectable. I conclude with a number of relatively accessible areas for future investigation.

Martini, P

2004-01-01T23:59:59.000Z

135

Astrophysical weak-interaction processes and nuclear effective field theory  

E-Print Network (OSTI)

Low-energy nuclear weak-interaction processes play important roles in many astrophysical contexts, and effective field theory is believed to be a highly useful framework for describing these processes in a model-independent manner. I present a brief account of the basic features of the nuclear effective theory approach, and some examples of actual calculations carried out in this method.

K. Kubodera

2004-04-09T23:59:59.000Z

136

Microscopic scattering theory for interacting bosons in weak random potentials  

E-Print Network (OSTI)

We develop a diagrammatic scattering theory for interacting bosons in a three-dimensional, weakly disordered potential. Based on a microscopic N-body scattering theory, we identify the relevant diagrams including elastic and inelastic collision processes that are sufficient to describe diffusive quantum transport. By taking advantage of the statistical properties of the weak disorder potential, we demonstrate how the N-body dynamics can be reduced to a nonlinear integral equation of Boltzmann type for the single-particle diffusive flux. Our theory reduces to the Gross-Pitaevskii mean field description in the limit where only elastic collisions are taken into account. However, even at weak interaction strength, inelastic collisions lead to energy redistribution between the bosons - initially prepared all at the same single-particle energy - and thereby induce thermalization of the single-particle current. In addition, we include also weak localization effects and determine the coherent corrections to the incoherent transport in terms of the coherent backscattering signal. We find that inelastic collisions lead to an enhancement of the backscattered cone in a narrow spectral window for increasing interaction strength.

Tobias Geiger; Andreas Buchleitner; Thomas Wellens

2013-07-18T23:59:59.000Z

137

Higgs Production by Gluon initiated Weak Boson Fusion  

E-Print Network (OSTI)

The gluon-gluon induced terms for Higgs production through weak-boson fusion are calculated. They form a finite and gauge-invariant subset of the NNLO corrections in the strong coupling constant. This is also the lowest order with sizeable t-channel colour exchange contributions, leading to additional hadronic activity between the outgoing jets.

M. M. Weber

2007-09-17T23:59:59.000Z

138

On the steady states of weakly reversible chemical reaction networks  

E-Print Network (OSTI)

A natural condition on the structure of the underlying chemical reaction network, namely weak reversibility, is shown to guarantee the existence of an equilibrium (steady state) in each positive stoichiometric compatibility class for the associated mass-action system. Furthermore, an index formula is given for the set of equilibria in a given stoichiometric compatibility class.

Deng, Jian; Feinberg, Martin; Nachman, Adrian

2011-01-01T23:59:59.000Z

139

A Weakly Nonlinear Primitive Equation Baroclinic Life Cycle  

Science Conference Proceedings (OSTI)

A weakly nonlinear baroclinic life cycle is examined with a spherical, multilevel, primitive equation model. The structure of the initial zonal jet is chosen so that the disturbance grows very slowly, that is, linear growth rate less than 0.1 day?...

Steven B. Feldstein

1994-01-01T23:59:59.000Z

140

Effective cavity pumping from weakly coupled quantum dots  

E-Print Network (OSTI)

We derive the effective cavity pumping and decay rates for the master equation of a quantum dot-microcavity system in presence of $N$ weakly coupled dots. We show that the in-flow of photons is not linked to the out-flow by thermal equilibrium relationships.

del Valle, E

2010-01-01T23:59:59.000Z

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.


141

Comparative analysis of remaining oil saturation in waterflood patterns based on analytical modeling and simulation  

E-Print Network (OSTI)

In assessing the economic viability of a waterflood project, a key parameter is the remaining oil saturation (ROS) within each pattern unit. This information helps in identifying the areas with the highest ROS and thus potential for further development. While special core analysis, log-inject-log, and thermal-decay time-log-evaluation techniques are available, they provide only single-point values and a snapshot in time near a wellbore. Also, they can quickly add up to an expensive program. The analytical areal distribution method estimates ROS in a waterflood pattern unit from material balance calculations using well injection and production data with no pressure information required. Well production and injection volumes are routinely measured in oilfield operations, making the method very attractive. The areal distribution technique estimates two major uncertainties: vertical loss of injected water into nontarget areas or areal loss into surrounding patterns, and injected water for gas fill-up. However, developers tested it only in low-pressure conditions, which are increasingly rare in oilfield operations. The main purpose of my research, then, was to verify whether or not the areal distribution method is valid in higher pressure conditions. Simulation of various waterflood patterns confirmed that the areal distribution method with its estimated ROS is capable of precise estimation of actual ROS, but at high pressures it requires consideration of pressure data in addition to injection and production data.

Azimov, Anar Etibar

142

An Assessment of Uncertainty in Remaining Life Estimation for Nuclear Structural Materials  

SciTech Connect

In recent years, several operating US light-water nuclear power reactors (LWRs) have moved to extended-life operations (from 40 years to 60 years), and there is interest in the feasibility of extending plant life to 80 years. Operating experience suggests that material degradation of structural components in LWRs (such as the reactor pressure vessel) is expected to be the limiting factor for safe operation during extended life. Therefore, a need exists for assessing the condition of LWR structural components and determining its remaining useful life (RUL). The ability to estimate RUL of degraded structural components provides a basis for determining safety margins (i.e., whether safe operation over some pre-determined time horizon is possible), and scheduling degradation management activities (such as potentially modifying operating conditions to limit further degradation growth). A key issue in RUL estimation is calculation of uncertainty bounds, which are dependent on current material state, as well as past and future stressor levels (such as time-at-temperature, pressure, and irradiation). This paper presents a preliminary empirical investigation into the uncertainty of RUL estimates for nuclear structural materials.

Ramuhalli, Pradeep; Griffin, Jeffrey W.; Fricke, Jacob M.; Bond, Leonard J.

2012-12-01T23:59:59.000Z

143

Chaotic and Arnold stripes in weakly chaotic Hamiltonian systems  

E-Print Network (OSTI)

The dynamics in weakly chaotic Hamiltonian systems strongly depends on initial conditions and little can be affirmed about generic behaviors. Using two distinct Hamiltonian systems, namely one particle in an open rectangular billiard and four particles globally coupled on a discrete lattice, we show that in these models the transition from integrable motion to weak chaos emerges via chaotic stripes as the nonlinear parameter is increased. The stripes represent intervals of initial conditions which generate chaotic trajectories and increase with the nonlinear parameter of the system. In the billiard case the initial conditions are the injection angles. For higher-dimensional systems and small nonlinearities the chaotic stripes are the initial condition inside which Arnold diffusion occurs.

Marcelo S. Custódio; Cesar Manchein; Marcus W. Beims

2011-11-30T23:59:59.000Z

144

The structure of weak shocks in quantum plasmas  

E-Print Network (OSTI)

The structure of a weak shock in a quantum plasma is studied, taking into account both dissipation terms due to thermal conduction and dispersive quantum terms due to the Bohm potential. Unlike quantum systems without dissipations, even a small thermal conduction may lead to a stationary shock structure. In the limit of zero quantum effects, the monotonic Burgers solution for the weak shock is recovered. Still, even small quantum terms make the structure non-monotonic with the shock driving a train of oscillations into the initial plasma. The oscillations propagate together with the shock. The oscillations become stronger as the role of Bohm potential increases in comparison with thermal conduction. The results could be of importance for laser-plasma interactions, such as inertial confinement fusion plasmas, and in astrophysical environments, as well as in condensed matter systems.

Bychkov, Vitaly; Marklund, Mattias

2008-01-01T23:59:59.000Z

145

Compatibility of weak rigidity with some types of elastic schemes  

SciTech Connect

The behavior of the hypoelastic-Synge, hypoelastic-Maugin, and hypoelastic-Carter and Quintana almost-thermodynamic material schemes, under weak rigidity hypotheses, is studied. In every case, the absence of principal transverse shock waves (or the vanishing of the corresponding speeds) is obtained. The same result follows for the longitudinal shock waves when the Lame coefficient ..mu.. does not vanish. A definition of an elastic almost-thermodynamic material scheme based on the Fermi--Walker transport is proposed and compared with the above elastic schemes. The speeds of the principal shock waves associated are attained and its compatibility with the Ferrando--Olivert incompressibility condition is proved. In the presence of weak rigidity the elastic schemes here defined lead (assuming ..mu..not =0) to the Born-rigidity condition.

del Olmo, V.; Olivert, J.

1986-04-01T23:59:59.000Z

146

Weak localization of light in superdiffusive random systems  

E-Print Network (OSTI)

L\\'evy flights constitute a broad class of random walks that occur in many fields of research, from animal foraging in biology, to economy to geophysics. The recent advent of L\\'evy glasses allows to study L\\'evy flights in controlled way using light waves. This raises several questions about the influence of superdiffusion on optical interference effects like weak and strong localization. Super diffusive structures have the extraordinary property that all points are connected via direct jumps, meaning that finite-size effects become an essential part of the physical problem. Here we report on the experimental observation of weak localization in L\\'evy glasses and compare results with recently developed optical transport theory in the superdiffusive regime. Experimental results are in good agreement with theory and allow to unveil how light propagates inside a finite-size superdiffusive system.

Burresi, Matteo; Savo, Romolo; Bertolotti, Jacopo; Vynck, Kevin; Wiersma, Diederik S

2011-01-01T23:59:59.000Z

147

Bounds on Heavy-to-Heavy Weak Decay Form Factors  

E-Print Network (OSTI)

We provide upper and lower bounds on the semileptonic weak decay form factors for $B \\to D^(*)$ and $\\Lambda_b \\to \\Lambda_c$ decays by utilizing inclusive heavy quark effective theory sum rules. These bounds are calculated to second order in $\\Lambda_{QCD}/m_Q$ and first order in $\\alpha_s$. The $O(\\alpha_s^2 \\beta_0)$ corrections to the bounds at zero recoil are also presented.

Chiang, C W

2001-01-01T23:59:59.000Z

148

Bounds on Heavy-to-Heavy Weak Decay Form Factors  

E-Print Network (OSTI)

We provide upper and lower bounds on the semileptonic weak decay form factors for $B \\to D^(*)$ and $\\Lambda_b \\to \\Lambda_c$ decays by utilizing inclusive heavy quark effective theory sum rules. These bounds are calculated to second order in $\\Lambda_{QCD}/m_Q$ and first order in $\\alpha_s$. The $O(\\alpha_s^2 \\beta_0)$ corrections to the bounds at zero recoil are also presented.

Cheng-Wei Chiang

2000-09-18T23:59:59.000Z

149

Charge and Spin Transport in Superconducting Weak Links  

E-Print Network (OSTI)

Abstract. The coherent mixing of the current states in the superconducting weak link subject to a Josephson phase difference ? and subject to an external transport current in the banks is one of the aims of this work. At ? = ? the nonlocal mixing of current states produces two vortices close to the point-contact between superconducting bulks. The effect of point-contact reflection in an impenetrable interface and effect of temperature on the vortices have been studied. It is obtained that increasing the reflection of the point-contact destroys the vortices while increasing the temperature restore these vortices. The vortex state is a new version of the interference between the macroscopic states and quantum tunnelling. Also, the weak link between unitary triplet superconductors which have f?wave and p + h?wave pairing symmetry has been studied from the spin and charge current-phase relation point of view. The main result in the second part of this thesis, is the polarization of the spin transport when a junction between triplet superconductors is used. It is observed that the spin current is the result of the misorientation between the gap vectors of two supercondcutors. In addition, the weak link between two bipolar nonunitary triplet superconductors is studied mathematically. The current-phase relations obtained in third part of this thesis are totally different from the junctions between the unitary spin-triplet superconductors and between the spin-singlet superconductors. The current phase diagrams which have been obtained in this work can be used to distinguish the symmetry of the order parameter in the crystals. PACS numbers: 74.50.+r, 74.20.Rp, 72.25.-b, 74.70.Pq, 74.70.TxCharge and Spin Transport in Superconducting Weak Links 2 1.

Gholamreza Rashedi

2005-01-01T23:59:59.000Z

150

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

2013-07-19T23:59:59.000Z

151

First Determination of the Weak Charge of the Proton  

SciTech Connect

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

152

TYPE III RADIO BURSTS PERTURBED BY WEAK CORONAL SHOCKS  

Science Conference Proceedings (OSTI)

Some type III bursts are observed to undergo sudden flux modifications, e.g., reductions and intensifications, when type III beams cross shocks in the upper corona or solar wind. First simulations are presented for type III bursts perturbed by weak coronal shocks, which type III beams traverse. The simulations incorporate spatially localized jumps in plasma density and electron and ion temperatures downstream of a shock. A shock is predicted to produce significant modulations to a type III burst: (1) a broadband flux reduction or frequency gap caused by the shock's density jump, (2) a narrowband flux intensification originating from where the downstream plasma density locally has a small gradient, (3) a possible intensification from the shock front or just upstream, and (4) changes in the frequency drift rate profile and the temporal evolution of radiation flux at frequencies corresponding to the shocked plasma. The modulations are caused primarily by fundamental modifications to the radiation processes in response to the shocked density and temperatures. The predicted intensifications and reductions appear qualitatively consistent with the available small number of reported observations, although it is unclear how representative these observations are. It is demonstrated that a weak shock can cause an otherwise radio-quiet type III beam to produce observable levels of narrowband radio emission. The simulations suggest that type III bursts with frequency-time fine structures may provide a tool to probe shocks in the corona and solar wind, especially for weak shocks that do not radiate by themselves.

Li, B.; Cairns, Iver H. [School of Physics, University of Sydney, New South Wales 2006 (Australia)

2012-07-10T23:59:59.000Z

153

Spectral multiplicity for powers of weakly mixing automorphisms  

SciTech Connect

We study the behaviour of the maximal spectral multiplicity m(R{sup n}) for the powers of a weakly mixing automorphism R. For some particular infinite sets A we show that there exists a weakly mixing rank-one automorphism R such that m(R{sup n})=n and m(R{sup n+1})=1 for all positive integers n element of A. Moreover, the cardinality cardm(R{sup n}) of the set of spectral multiplicities for the power R{sup n} is shown to satisfy the conditions cardm(R{sup n+1})=1 and cardm(R{sup n})=2{sup m(n)}, m(n){yields}{infinity}, n element of A. We also construct another weakly mixing automorphism R with the following properties: all powers R{sup n} have homogeneous spectra and the set of limit points of the sequence {l_brace}m(R{sup n})/n:n element of N{r_brace} is infinite. Bibliography: 17 titles.

Ryzhikov, Valerii V [M. V. Lomonosov Moscow State University, Faculty of Mechanics and Mathematics, Moscow (Russian Federation)

2012-07-31T23:59:59.000Z

154

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

Science Conference Proceedings (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

155

On third homology of SL_2 and weak homotopy invariance.  

E-Print Network (OSTI)

The goal of the paper is to achieve - in the special case of the linear group SL_2 - some understanding of the relation between group homology and its A^1-invariant replacement. We discuss some of the general properties of A^1-invariant group homology, such as stabilization sequences and Grothendieck-Witt module structures. Together with very precise knowledge about refined Bloch groups, these methods allow to deduce that in general there is a rather large difference between group homology and its A^1-invariant version. In other words, weak homotopy invariance fails for SL_2 over many families of non-algebraically closed fields.

Kevin Hutchinson; Matthias Wendt

156

Coherent state of a weakly interacting ultracold Fermi gas  

E-Print Network (OSTI)

We examine the weakly interacting atoms in an ultracold Fermi gas leading to a state of macroscopic coherence, from a theoretical perspective. It has been shown that this state can be described as a fermionic coherent state. These coherent states are the eigenstates of fermionic annihilation operators, the eigenvalues being anti-commuting numbers or Grassmann numbers. By exploiting the simple rules of Grassmann algebra and a close kinship between relations evaluated for more familiar bosonic fields and those for fermionic fields, we derive the thermodynamic limit, the spontaneous symmetry breaking and the quasi-particle spectrum of the fermionic system.

Arnab Ghosh; Sudarson Sekhar Sinha; Deb Shankar Ray

2013-01-17T23:59:59.000Z

157

Weak Interaction Neutron Production Rates in Fully Ionized Plasmas  

E-Print Network (OSTI)

Employing the weak interaction reaction wherein a heavy electron is captured by a proton to produce a neutron and a neutrino, the neutron production rate for neutral hydrogen gases and for fully ionized plasmas is computed. Using the Coulomb atomic bound state wave functions of a neutral hydrogen gas, our production rate results are in agreement with recent estimates by Maiani {\\it et al}. Using Coulomb scattering state wave functions for the fully ionized plasma, we find a substantially enhanced neutron production rate. The scattering wave function should replace the bound state wave function for estimates of the enhanced neutron production rate on water plasma drenched cathodes of chemical cells.

A. Widom; J. Swain; Y. N. Srivastava

2013-05-19T23:59:59.000Z

158

Initial Public Offerings with Strong and Weak Premarket Interests †  

E-Print Network (OSTI)

We revisit IPO underpricing and long-run performance conditioned on premarket interest. Using 4,260 non-financial IPOs during 1990-2004, we find that even IPOs faced with weak premarket interest (and consequently priced lower) are underpriced on average by 4.3 percent, which is mostly unpredicted by previous studies. In the long run, we find that low-interest IPOs have much less underperformance than high-interest IPOs over the four years after IPO. Furthermore, after controlling for size, we find little evidence for longrun underperformance in low-interest IPOs.

Sangkyoo (s. Q. Kang; Joseph P. Ogden

2009-01-01T23:59:59.000Z

159

Limits from Weak Gravity Conjecture on Dark Energy Models  

E-Print Network (OSTI)

The weak gravity conjecture has been proposed as a criterion to distinguish the landscape from the swampland in string theory. As an application in cosmology of this conjecture, we use it to impose theoretical constraint on parameters of two types of dark energy models. Our analysis indicates that the Chaplygin-gas-type models realized in quintessence field are in the swampland, whereas the $a$ power-low decay model of the variable cosmological constant can be viable but the parameters are tightly constrained by the conjecture.

Xing Wu; Zong-Hong Zhu

2007-10-07T23:59:59.000Z

160

Effects of weakly coupled channels on quasielastic barrier distributions  

Science Conference Proceedings (OSTI)

Heavy-ion collisions often produce fusion barrier distributions with structures displaying a fingerprint of couplings to highly collective excitations. Similar distributions can be obtained from large-angle quasielastic scattering, although in this case, the role of the many weak direct-reaction channels is unclear. For {sup 20}Ne+{sup 90}Zr, we have observed the barrier structures expected for the highly deformed neon projectile; however, for {sup 20}Ne+{sup 92}Zr, we find significant extra absorption into a large number of noncollective inelastic channels. This leads to smearing of the barrier distribution and a consequent reduction in the ''resolving power'' of the quasielastic method.

Piasecki, E.; Kisielinski, M. [Heavy Ion Laboratory, Warsaw University, Warsaw (Poland); The Andrzej Soltan Institute for Nuclear Studies, Swierk (Poland); Swiderski, L.; Keeley, N.; Rusek, K.; Strojek, I. [The Andrzej Soltan Institute for Nuclear Studies, Swierk (Poland); Gawlikowicz, W.; JastrzePbski, J.; Kordyasz, A.; Trzcinska, A. [Heavy Ion Laboratory, Warsaw University, Warsaw (Poland); Kliczewski, S. [The Henryk Niewodniczanski Institute of Nuclear Physics, Krakow (Poland); Kowalczyk, M. [Heavy Ion Laboratory, Warsaw University, Warsaw (Poland); Institute of Experimental Physics, Warsaw University, Warsaw (Poland); Khlebnikov, S. [Khloplin Radium Institute, St. Petersburg (Russian Federation); Koshchiy, E. [Kharkiv University, Kharkiv (Ukraine); Kozulin, E.; Loktev, T.; Smirnov, S. [JINR, Dubna (Russian Federation); Krogulski, T. [Faculty of Physics, University of Bialystok, Bialystok (Poland); Mutterer, M. [Institut fuer Kernphysik, Technische Universitaet Darmstadt, Darmstadt (Germany); Piasecki, K. [Institute of Experimental Physics, Warsaw University, Warsaw (Poland)] (and others)

2009-11-15T23:59:59.000Z

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.


161

Some new links between the weak KAM and Monge problems  

E-Print Network (OSTI)

The weak KAM theory predicts the survivals of invariant measures of Hamiltonian systems under large perturbations. It is the subject of an extensive research in the last few decades. The optimal mass transportation was introduced by Monge some 200 years ago and is, today, the source of large number of results in analysis, geometry and convexity. Recently, some interesting links where discovered between these two fields. Here we investigate a new, surprising link involving the metric Monge distance. In particular we get for any pair of probability measures $\\lambda^+,\\lambda^-$ a generalization of the identity

Wolansky, Gershon

2009-01-01T23:59:59.000Z

162

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.

163

Weak lensing and the Dyer-Roeder approximation  

E-Print Network (OSTI)

The distance-redshift relation plays an important role in cosmology. In the standard approach to cosmology it is assumed that this relation is the same as in the homogeneous universe. As the real universe is not homogeneous there are several methods to calculate the correction. The weak lensing approximation and the Dyer-Roeder relation are one of them. This paper establishes a link between these two approximations. It is shown that if the universe is homogeneous with only small, vanishing after averaging, density fluctuations along the line of sight, then the distance correction is negligible. It is also shown that a vanishing 3D average of density fluctuations does not imply that the mean of density fluctuations along the line of sight is zero. In this case, even within the linear approximation, the distance correction is not negligible. The modified version of the Dyer-Roeder relation is presented and it is shown that this modified relation is consistent with the correction obtained within the weak lensing approximation. The correction to the distance for a source at z ~ 2 is of order of a few percent. Thus, with an increasing precision of cosmological observations an accurate estimation of the distance is essential. Otherwise errors due to miscalculation the distance can become a major source of systematics.

Krzysztof Bolejko

2010-11-17T23:59:59.000Z

164

Weak and Strong coupling regimes in plasmonic-QED  

E-Print Network (OSTI)

We present a quantum theory for the interaction of a two level emitter with surface plasmon polaritons confined in single-mode waveguide resonators. Based on the Green's function approach, we develop the conditions for the weak and strong coupling regimes by taking into account the sources of dissipation and decoherence: radiative and non-radiative decays, internal loss processes in the emitter, as well as propagation and leakage losses of the plasmons in the resonator. The theory is supported by numerical calculations for several quantum emitters, GaAs and CdSe quantum dots and NV centers together with different types of resonators constructed of hybrid, cylindrical or wedge waveguides. We further study the role of temperature and resonator length. Assuming realistic leakage rates, we find the existence of an optimal length at which strong coupling is possible. Our calculations show that the strong coupling regime in plasmonic resonators is accessible within current technology when working at very low temperatures (<4K). In the weak coupling regime our theory accounts for recent experimental results. By further optimization we find highly enhanced spontaneous emission with Purcell factors over 1000 at room temperature for NV-centers. We finally discuss more applications for quantum nonlinear optics and plasmon-plasmon interactions.

T. Hümmer; F. J. García-Vidal; L. Martín-Moreno; D. Zueco

2012-09-08T23:59:59.000Z

165

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

Energy.gov (U.S. Department of Energy (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...

166

Large Deviations in the Superstable Weakly Imperfect Bose Gas  

E-Print Network (OSTI)

The superstable Weakly Imperfect Bose Gas {(WIBG)} was originally derived to solve the inconsistency of the Bogoliubov theory of superfluidity. Its grand-canonical thermodynamics was recently solved but not at {point of} the {(first order)} phase transition. This paper proposes to close this gap by using the large deviations formalism and in particular the analysis of the Kac distribution function. It turns out that, as a function of the chemical potential, the discontinuity of the Bose condensate density at the phase transition {point} disappears as a function of the particle density. Indeed, the Bose condensate continuously starts at the first critical particle density and progressively grows but the free-energy per particle stays constant until the second critical density is reached. At higher particle densities, the Bose condensate density as well as the free-energy per particle both increase {monotonously}.

J. -B. Bru; V. A. Zagrebnov

2007-09-21T23:59:59.000Z

167

Inspecting the Higgs for New Weakly Interacting Particles  

E-Print Network (OSTI)

We explore new physics scenarios which are optimally probed through precision Higgs measurements rather than direct collider searches. Such theories consist of additional electroweak charged or singlet states which couple directly to or mix with the Higgs boson; particles of this kind may be weakly constrained by direct limits due to their meager production rates and soft decay products. We present a simplified framework which characterizes the effects of these states on Higgs physics by way of tree level mixing (with neutral scalars) and loop level modifications (from electrically charged states), all expressed in terms of three mixing angles and three loop parameters, respectively. The theory parameters are constrained and in some cases even fixed by ratios of Higgs production and decay rates. Our setup is simpler than a general effective operator analysis, in that we discard parameters irrelevant to Higgs observables while retaining complex correlations among measurements that arise due to the underlying m...

Cheung, Clifford; Zurek, Kathryn M

2013-01-01T23:59:59.000Z

168

Are vortices in rotating superfluids breaking the Weak Equivalence Principle?  

E-Print Network (OSTI)

Due to the breaking of gauge symmetry in rotating superfluid Helium, the inertial mass of a vortex diverges with the vortex size. The vortex inertial mass is thus much higher than the classical inertial mass of the vortex core. An equal increase of the vortex gravitational mass is questioned. The possibility that the vortices in a rotating superfluid could break the weak equivalence principle in relation with a variable speed of light in the superfluid vacuum is debated. Experiments to test this possibility are investigated on the bases that superfluid Helium vortices would not fall, under the single influence of a uniform gravitational field, at the same rate as the rest of the superfluid Helium mass.

Clovis Jacinto de Matos

2009-09-15T23:59:59.000Z

169

Anomaly induced transport coefficients, from weak to strong coupling  

E-Print Network (OSTI)

The existence of new transport phenomena associated to the presence of quantum anomalies has atracted very recently the attention of theorist. These transport coefficient have very interesting properties, for example, they do not renormalize. The most famous case of anomaly induced transport phenomena is the Chiral Magnetic Effect, in which an electric current is produced by a magnetic field if the system has a different number of right handed fermions respect the left handed one. In this thesis we have studied those transport coefficients from Kubo formulas at weak and strong coupling. To finish a fluid/gravity approach is used to compute all the second order anomalous coefficients in an anomalous conformal fluid.

Francisco Pena-Benitez

2013-07-01T23:59:59.000Z

170

Nonlinear microwave response of aluminum weak-link Josephson oscillators  

E-Print Network (OSTI)

We present the driven response at T=30mK of 6 GHz superconducting resonators constructed from capacitively-shunted three dimensional (3D) aluminum nanobridge superconducting quantum interference devices (nanoSQUIDs). We observe flux modulation of the resonant frequency in quantitative agreement with numerical calculation and characteristic of near-ideal short weak link junctions. Under strong microwave excitation, we observe stable bifurcation in devices with coupled quality factor (Q) ranging from ~30-3500. Near this bias point, parametric amplification with > 20dB gain, 40 MHz bandwidth, and near quantum-limited noise performance is observed. Our results indicate that 3D nanobridge junctions are attractive circuit elements to realize quantum bits.

E. M. Levenson-Falk; R. Vijay; I. Siddiqi

2011-01-24T23:59:59.000Z

171

Nonlinear microwave response of aluminum weak-link Josephson oscillators  

E-Print Network (OSTI)

We present the driven response at T=30mK of 6 GHz superconducting resonators constructed from capacitively-shunted three dimensional (3D) aluminum nanobridge superconducting quantum interference devices (nanoSQUIDs). We observe flux modulation of the resonant frequency in quantitative agreement with numerical calculation and characteristic of near-ideal short weak link junctions. Under strong microwave excitation, we observe stable bifurcation in devices with coupled quality factor (Q) ranging from ~30-3500. Near this bias point, parametric amplification with > 20dB gain, 40 MHz bandwidth, and near quantum-limited noise performance is observed. Our results indicate that 3D nanobridge junctions are attractive circuit elements to realize quantum bits.

Levenson-Falk, E M; Siddiqi, I

2011-01-01T23:59:59.000Z

172

Weak Lensing Mass Reconstruction of the Galaxy Cluster Abell 209  

E-Print Network (OSTI)

Weak lensing applied to deep optical images of clusters of galaxies provides a powerful tool to reconstruct the distribution of the gravitating mass associated to these structures. We use the shear signal extracted by an analysis of deep exposures of a region centered around the galaxy cluster Abell 209, at redshift z=0.2, to derive both a map of the projected mass distribution and an estimate of the total mass within a characteristic radius. We use a series of deep archival R-band images from CFHT-12k, covering an area of 0.3 deg^2. We determine the shear of background galaxy images using a new implementation of the modified Kaiser-Squires-Broadhurst pipeline for shear determination, which we has been tested against the ``Shear TEsting Program 1 and 2'' simulations. We use mass aperture statistics to produce maps of the 2 dimensional density distribution, and parametric fits using both Navarro-Frenk-White (NFW) and singular-isothermal-sphere profiles to constrain the total mass. The projected mass distribution shows a pronounced asymmetry, with an elongated structure extending from the SE to the NW. This is in general agreement with the optical distribution previously found by other authors. A similar elongation was previously detected in the X-ray emission map, and in the distribution of galaxy colours. The circular NFW mass profile fit gives a total mass of M_{200} = 7.7^{+4.3}_{-2.7} 10^{14} solar masses inside the virial radius r_{200} = 1.8\\pm 0.3 Mpc. The weak lensing profile reinforces the evidence for an elongated structure of Abell 209, as previously suggested by studies of the galaxy distribution and velocities.

S. Paulin-Henriksson; V. Antonuccio-Delogu; C. P. Haines; M. Radovich; A. Mercurio; U. Becciani

2007-01-28T23:59:59.000Z

173

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

174

Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Green Energy (OSTI)

The weak mixing parameter, sin{sup 2} {theta}{sub w}, is one of the fundamental parameters of the Standard Model. Its tree-level value has been measured with high precision at energies near the Z{sup 0} pole; however, due to radiative corrections at the one-loop level, the value of sin{sup 2} {theta}{sub w} is expected to change with the interaction energy. As a result, a measurement of sin{sup 2} {theta}{sub w} at low energy (Q{sup 2} << m{sub Z}, where Q{sup 2} is the momentum transfer and m{sub Z} is the Z boson mass), provides a test of the Standard Model at the one-loop level, and a probe for new physics beyond the Standard Model. One way of obtaining sin{sup 2} {theta}{sub w} at low energy is from measuring the left-right, parity-violating asymmetry in electron-electron (Moeller) scattering: A{sub PV} = {sigma}{sub R}-{sigma}{sub L}/{sigma}{sub R}+{sigma}{sub L}, where {sigma}{sub R} and {sigma}{sub L} are the cross sections for right- and left-handed incident electrons, respectively. The parity violating asymmetry is proportional to the pseudo-scalar weak neutral current coupling in Moeller scattering, g{sub ee}. At tree level g{sub ee} = (1/4 -sin{sup 2} {theta}{sub w}). A precision measurement of the parity-violating asymmetry in Moeller scattering was performed by Experiment E158 at the Stanford Linear Accelerator Center (SLAC). During the experiment, {approx}50 GeV longitudinally polarized electrons scattered off unpolarized atomic electrons in a liquid hydrogen target, corresponding to an average momentum transfer Q{sup 2} {approx} 0.03 (GeV/c){sup 2}. The tree-level prediction for A{sub PV} at such energy is {approx}300 ppb. However one-loop radiative corrections reduce its value by {approx}40%. This document reports the E158 results from the 2002 data collection period. The parity-violating asymmetry was found to be A{sub PV} = -160 {+-} 21 (stat.) {+-} 17 (syst.) ppb, which represents the first observation of a parity-violating asymmetry in Moeller scattering. This value corresponds to a weak mixing angle at Q{sup 2} = 0.026 (GeV/c){sup 2} of sin{sup 2} {theta}{sub w{ovr MS}} = 0.2379 {+-} 0.0016 (stat.) {+-} 0.0013 (syst.), which is -0.3 standard deviations away from the Standard Model prediction: sin{sup 2} {theta}{sub w{ovr MS}}{sup predicted} = 0.2385 {+-} 0.0006 (theory). The E158 measurement of sin{sup 2} {theta}{sub w} at a precision of {delta}(sin{sup 2} {theta}{sub w}) = 0.0020 provides new physics sensitivity at the TeV scale.

Klejda, B.

2005-01-28T23:59:59.000Z

175

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

176

Apparatus for determining past-service conditions and remaining life of thermal barrier coatings and components having such coatings  

DOE Patents (OSTI)

An apparatus for determining past-service conditions and/or remaining useful life of a component of a combustion engine and/or a thermal barrier coating ("TBC") of the component comprises a radiation source that provides the exciting radiation to the TBC to excite a photoluminescent ("PL") material contained therein, a radiation detector for detecting radiation emitted by the PL material, and means for relating a characteristic of an emission spectrum of the PL material to the amount of a crystalline phase in the TBC, thereby inferring the past-service conditions or the remaining useful life of the component or the TBC.

Srivastava, Alok Mani (Niskayuna, NY); Setlur, Anant Achyut (Niskayuna, NY); Comanzo, Holly Ann (Niskayuna, NY); Devitt, John William (Clifton Park, NY); Ruud, James Anthony (Delmar, NY); Brewer, Luke Nathaniel (Rexford, NY)

2004-05-04T23:59:59.000Z

177

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

SciTech Connect

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

178

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

Science Conference Proceedings (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.

2000-06-05T23:59:59.000Z

179

of hydrogen-powered cars," he says. But a major hurdle remains: the cost of platinum metal  

E-Print Network (OSTI)

of hydrogen-powered cars," he says. But a major hurdle remains: the cost of platinum metal needed to produce nothing but pure water as exhaust and clean electricity for power. At the heart of every fuel cell is an advanced plastic membrane coated with a platinum catalyst. That's where the production of electricity takes

180

Weak Lensing Determination of the Mass in Galaxy Halos  

E-Print Network (OSTI)

We detect the weak gravitational lensing distortion of 450,000 background galaxies (20projected radius of 200 \\hkpc, the shear profile is consistent with an isothermal profile with circular velocity 164+-20 km/s for an L* galaxy, consistent with typical disk rotation at this luminosity. This halo mass normalization, combined with the halo profile derived by Fischer et al (2000) from lensing analysis SDSS data, places a lower limit of (2.7+-0.6) x 10^{12}h^{-1} solar masses on the mass of an L* galaxy halo, in good agreement with satellite galaxy studies. Given the known luminosity function of LCRS galaxies, and the assumption that $M\\propto L^\\beta$ for galaxies, we determine that the mass within 260\\hkpc of normal galaxies contributes $\\Omega=0.16\\pm0.03$ to the density of the Universe (for $\\beta=1$) or $\\Omega=0.24\\pm0.06$ for $\\beta=0.5$. These lensing data suggest that $0.6agreement with the usual $\\beta\\approx0.5$ Faber-Jackson or Tully-Fisher scaling. This is the most complete direct inventory of the matter content of the Universe to date.

D. R. Smith; G. M. Bernstein; P. Fischer; R. M. Jarvis

2000-10-03T23:59:59.000Z

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181

A NEW MEASUREMENT OF THE WEAK MIXING ANGLE  

DOE Green Energy (OSTI)

The E158 experiment at SLAC has made the first measurement of parity violation in electron-electron (Moeller) scattering. The authors report a preliminary result using 50% of the accumulated data sample for the right-left parity-violating cross-section asymmetry (A{sub PV}) in the elastic scattering of 45 and 48 GeV polarized electron beams with unpolarized electrons in a liquid hydrogen target. They find A{sub PV} = (-160 {+-} 21(stat.) {+-} 17(syst.)) {center_dot} 10{sup -9}, with a significance of 6.3{sigma} for observing parity violation. In the context of the Standard Model, this yields a measurement of the weak mixing angle, sin{sup 2} {theta}{sub W}{sup {ovr MS}} (Q{sup 2} = 0.026GeV{sup 2}) = 0.2379 {+-} 0.0016(stat.) {+-} 0.0013(syst.). They also present preliminary results for the first observation of a single-spin transverse asymmetry in Moeller scattering.

Woods, M

2004-02-26T23:59:59.000Z

182

Perpendicular propagating modes for weakly magnetized relativistic degenerate plasma  

SciTech Connect

Using the Vlasov-Maxwell system of equations, the dispersion relations for the perpendicular propagating modes (i.e., X-mode, O-mode, and upper hybrid mode) are derived for a weakly magnetized relativistic degenerate electron plasma. By using the density (n{sub 0}=p{sub F}{sup 3}/3{pi}{sup 2} Planck-Constant-Over-Two-Pi {sup 3}) and the magnetic field values for different relativistic degenerate environments, the propagation characteristics (i.e., cutoff points, resonances, dispersions, and band widths in k-space) of these modes are examined. It is observed that the relativistic effects suppress the effect of ambient magnetic field and therefore the cutoff and resonance points shift towards the lower frequency regime resulting in enhancement of the propagation domain. The dispersion relations of these modes for the non-relativistic limit (p{sub F}{sup 2} Much-Less-Than m{sub 0}{sup 2}c{sup 2}) and the ultra-relativistic limit (p{sub F}{sup 2} Much-Greater-Than m{sub 0}{sup 2}c{sup 2}) are also presented.

Abbas, Gohar; Bashir, M. F. [Salam Chair in Physics, G. C. University Lahore, Punjab 54000 (Pakistan); Department of Physics, G. C. University Lahore, Punjab 54000 (Pakistan); Murtaza, G. [Salam Chair in Physics, G. C. University Lahore, Punjab 54000 (Pakistan)

2012-07-15T23:59:59.000Z

183

BE condensates of weakly interacting bosons in gravity fields  

E-Print Network (OSTI)

The Bose-Einstein (BE) condensates of weakly interacting bosons in a strong gravity field, such as AGN (Active Galactic Nuclei), BHs (black holes) and neutron stars, are discussed. Being bound systems in gravity fields, these are stable reservoirs for the Higgs bosons, and vector bosons of Z and W as well as supersymmetric bosons. Upon gravitational disturbances, such as a gravitational collapse, these objects are relieved from the BE condensate bound states and decay or interact with each other freely. Using the repulsive nature of gravity at short distances which was obtained by the present author as quantum corrections to gravity, the particles produced by the decays or interactions of the bosons liberated from BE condensates can be emitted outside the horizon for our observation. It is suggested that the recently observed gamma ray peak at 129.8 +- 2.4 GeV from FERMI Large Area Telescope may be evidence for the existence of the Higgs boson condensates. The BE condensates of supersymmetric bosons are the most likely sources for the gamma rays from DMP (dark matter particle) and anti-DMP collisions. It is shown that the said process from DMPs spread in the galaxy is too small for the incident DMP with the intensity of the cosmic ray energy spectrum.

Yukio Tomozawa

2012-11-21T23:59:59.000Z

184

Weakly Charged Cationic Nanoparticles Induce DNA Bending and Strand Separation  

SciTech Connect

The understanding of interactions between double stranded (ds) DNA and charged nanoparticles will have a broad bearing on many important applications from drug delivery [ 1 4 ] to DNAtemplated metallization. [ 5 , 6 ] Cationic nanoparticles (NPs) can bind to DNA, a negatively charged molecule, through a combination of electrostatic attraction, groove binding, and intercalation. Such binding events induce changes in the conformation of a DNA strand. In nature, DNA wraps around a cylindrical protein assembly (diameter and height of 6 nm) [ 7 ] with an 220 positive charge, [ 8 ] creating the complex known as chromatin. Wrapping and bending of DNA has also been achieved in the laboratory through the binding of highly charged species such as molecular assemblies, [ 9 , 10 ] cationic dendrimers, [ 11 , 12 ] and nanoparticles. [ 13 15 ] The charge of a nanoparticle plays a crucial role in its ability to induce DNA structural changes. If a nanoparticle has a highly positive surface charge density, the DNA is likely to wrap and bend upon binding to the nanoparticle [ 13 ] (as in the case of chromatin). On the other hand, if a nanoparticle is weakly charged it will not induce dsDNA compaction. [ 9 , 10 , 15 ] Consequently, there is a transition zone from extended to compact DNA conformations which depends on the chemical nature of the nanoparticle and occurs for polycations with charges between 5 and 10. [ 9 ] While the interactions between highly charged NPs and DNA have been extensively studied, the processes that occur within the transition zone are less explored.

Railsback, Justin [North Carolina State University; Singh, Abhishek [North Carolina State University; Pearce, Ryan [North Carolina State University; McKnight, Timothy E [ORNL; Collazo, Ramon [North Carolina State University; Sitar, Zlatko [ORNL; Yingling, Yaroslava [North Carolina State University; Melechko, Anatoli Vasilievich [ORNL

2012-01-01T23:59:59.000Z

185

Inspecting the Higgs for New Weakly Interacting Particles  

E-Print Network (OSTI)

We explore new physics scenarios which are optimally probed through precision Higgs measurements rather than direct collider searches. Such theories consist of additional electroweak charged or singlet states which couple directly to or mix with the Higgs boson; particles of this kind may be weakly constrained by direct limits due to their meager production rates and soft decay products. We present a simplified framework which characterizes the effects of these states on Higgs physics by way of tree level mixing (with neutral scalars) and loop level modifications (from electrically charged states), all expressed in terms of three mixing angles and three loop parameters, respectively. The theory parameters are constrained and in some cases even fixed by ratios of Higgs production and decay rates. Our setup is simpler than a general effective operator analysis, in that we discard parameters irrelevant to Higgs observables while retaining complex correlations among measurements that arise due to the underlying mixing and radiative effects. We show that certain correlated observations are forbidden, e.g. a depleted ratio of Higgs production from gluon fusion versus vector boson fusion together with a depleted ratio of Higgs decays to bb versus WW. Moreover, we study the strong correlation between the Higgs decay rate to gamma gamma and WW and how it can be violated in the presence of additional electrically charged particles. Our formalism maps straightforwardly onto a variety of new physics models, such as the NMSSM. We show, for example, that with a Higgsino of mass > 100 GeV and a singlet-Higgs coupling of lambda=0.7, the photon signal strength can deviate from the vector signal strength by up to ~ 40-60% while depleting the vector signal strength by only 5-15% relative to the Standard Model.

Clifford Cheung; Samuel D. McDermott; Kathryn M. Zurek

2013-02-01T23:59:59.000Z

186

BUOYANCY INSTABILITIES IN A WEAKLY COLLISIONAL INTRACLUSTER MEDIUM  

SciTech Connect

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

187

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

188

Remaining Sites Verification Package for 132-DR-1, 1608-DR Effluent Pumping Station, Waste Site Reclassification Form 2005-035  

SciTech Connect

Radiological characterization, decommissioning and demolition of the 132-DR-1 site, 1608-DR Effluent Pumping Station was performed in 1987. The current site conditions achieve the remedial action objectives and the corresponding remedial action goals established in the Remaining Sites ROD. Residual concentrations support future land uses that can be represented by a rural-residential scenario and pose no threat to groundwater or the Columbia River based on RESRAD modeling.

R. A. Carlson

2005-09-22T23:59:59.000Z

189

Advanced Gas Turbine Guidelines: Hot Gas Path Parts Condition and Remaining Life Assessment for GE 7FA in Baseload Operation  

Science Conference Proceedings (OSTI)

Based on two years experience operating four advanced gas turbines (AGT) General Electric MS 7221 FA at Martin CC of Florida Power & Light (FP&L), this guideline describes the operating and maintenance philosophy used for baseload AGT units and the integrity of the hot path components and their remaining life. The guideline will assist utilities operating the GE MS 7221FA class AGT plan inspections and comparisons with other units in this class.

1997-04-16T23:59:59.000Z

190

Geomechanical and weathering properties of weak roof shales in coal mines.  

E-Print Network (OSTI)

??Many coal seams have weak shale immediate roofs that cause ground control problems. Therefore, it is important to know the properties of these shales so… (more)

Gurgenli, Hakan.

2006-01-01T23:59:59.000Z

191

Wind Power Price Trends in the United States: Struggling to Remain Competitive in the Face of Strong Growth  

SciTech Connect

The amount of wind power capacity being installed globally is surging, with the United States the world leader in terms of annual market share for three years running (2005-2007). The rapidly growing market for wind has been a double-edged sword, however, as the resulting supply-demand imbalance in wind turbines, along with the rising cost of materials and weakness in the U.S. dollar, has put upward pressure on wind turbine costs, and ultimately, wind power prices. Two mitigating factors--reductions in the cost of equity provided to wind projects and improvements in project-level capacity factors--have helped to relieve some of the upward pressure on wind power prices over the last few years. Because neither of these two factors can be relied upon to further cushion the blow going forward, policymakers should recognize that continued financial support may be necessary to sustain the wind sector at its current pace of development, at least in the near term. Though this article emphasizes developments in the U.S. market for wind power, those trends are similar to, and hold implications for, the worldwide wind power market.

Bolinger, Mark A; Wiser, Ryan

2008-10-30T23:59:59.000Z

192

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

SciTech Connect

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

193

Detecting of Coal Gas Weak Signals Using Lyapunov Exponent under Strong Noise Background  

Science Conference Proceedings (OSTI)

In coal gas monitoring system, the early detecting of gas concentration is key technique for preventing the gas explosion because the coal gas signals are very weak under strong noise background in mining digging laneway. In this paper, the coal gas ... Keywords: Coal gas, weak signals, coal mine underground, Lyapunov exponent, Duffing chaotic oscillator

Ma Xian-Min

2013-01-01T23:59:59.000Z

194

Unbalanced Load Flow for Weakly Meshed Distribution Systems with Distributed Generation  

Science Conference Proceedings (OSTI)

Distributed Generation (DG) can bring support to distribution system, meanwhile, it bring unbalancedness in power source, load and line. Traditional load flow algorithms are not applicable to the weakly meshed distribution system with DGs. First, this ... Keywords: weakly meshed distribution system, distributed generation, unbalanced load flow, sensitivity compensation

Shao-Qiang Hu; Sen-Mao Li

2010-06-01T23:59:59.000Z

195

Constraining the interacting dark energy models from weak gravity conjecture and recent observations  

E-Print Network (OSTI)

We examine the effectiveness of the weak gravity conjecture in constraining the dark energy by comparing with observations. For general dark energy models with plausible phenomenological interactions between dark sectors, we find that although the weak gravity conjecture can constrain the dark energy, the constraint is looser than that from the observations.

Chen, Ximing; Pan, Nana; Gong, Yungui

2010-01-01T23:59:59.000Z

196

Weakly-supervised discovery of named entities using web search queries  

Science Conference Proceedings (OSTI)

A seed-based framework for textual information extraction allows for weakly supervised extraction of named entities from anonymized Web search queries. The extraction is guided by a small set of seed named entities, without any need for handcrafted extraction ... Keywords: knowledge acquisition, named entities, query logs, unstructured text, weakly supervised information extraction

Marius Pa?ca

2007-11-01T23:59:59.000Z

197

Bootstrapping a hop-optimal network in the weak sensor model  

Science Conference Proceedings (OSTI)

Sensor nodes are very weak computers that get distributed at random on a surface. Once deployed, they must wake up and form a radio network. Sensor network bootstrapping research thus has three parts: One must model the restrictions on sensor nodes; ... Keywords: Ad hoc network, contention resolution, maximal independent set, radio network, random geometric graphs, sensor network, weak sensor model

Martin Farach-Colton; Rohan J. Fernandes; Miguel A. Mosteiro

2009-10-01T23:59:59.000Z

198

Weakly nonlocal non-equilibrium thermodynamics - variational principles and Second Law  

E-Print Network (OSTI)

A general, uniform, rigorous and constructive thermodynamic approach to weakly nonlocal non-equilibrium thermodynamics is reviewed. A method is given to construct and restrict the evolution equations of physical theories according to the Second Law of thermodynamics and considering weakly nonlocal constitutive state spaces. The evolution equations of internal variables, the classical irreversible thermodynamics and Korteweg fluids are treated.

Ván, P

2009-01-01T23:59:59.000Z

199

Focusing of weak shock waves and the von Neumann paradox of oblique shock reflection  

E-Print Network (OSTI)

Focusing of weak shock waves and the von Neumann paradox of oblique shock reflection Esteban G of weak shock waves at small angles are considered: the focusing of curved fronts at a&es, the transition between regular and irregular reflection of oblique shock waves on rigid walls and the diffraction

Tabak, Esteban G.

200

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

Science Conference Proceedings (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

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

Applications of Laminar Weak-Link Mechanisms for Ultraprecision Synchrotron Radiation Instruments  

Science Conference Proceedings (OSTI)

Unlike traditional kinematic flexure mechanisms, laminar overconstrained weak-link mechanisms provide much higher structure stiffness and stability. Using a laminar structure configured and manufactured by chemical etching and lithography techniques, we are able to design and build linear and rotary weak-link mechanisms with ultrahigh positioning sensitivity and stability for synchrotron radiation applications. Applications of laminar rotary weak-link mechanism include: high-energy-resolution monochromators for inelastic x-ray scattering and x-ray analyzers for ultra-small-angle scattering and powder-diffraction experiments. Applications of laminar linear weak-link mechanism include high-stiffness piezo-driven stages with subnanometer resolution for an x-ray microscope. In this paper, we summarize the recent designs and applications of the laminar weak-link mechanisms at the Advanced Photon Source.

Shu, D.; Toellner, T. S.; Alp, E. E.; Maser, J.; Ilavsky, J.; Shastri, S. D.; Lee, P. L.; Narayanan, S.; Long, G. G. [Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)

2007-01-19T23:59:59.000Z

202

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

203

Calibration Technique for Superfluid 4He Weak-Link Cells Based on the Fountain Effect  

Science Conference Proceedings (OSTI)

Studies of superfluid 4He weak-links require calibration constants which permit the determination of the pressure and temperature differences which drive Josephson oscillations. We describe a technique for calibrating 4He weak-link cells in which a heater is used to induce fountain pressures detected by the deflection of a diaphragm. The technique determines the diaphragm spring constant, the inner cell volume, and the thermal conductance of the inner cells walls. This information is used to convert the measured deflection of the diaphragm into the total chemical potential difference across the weak link.

Hoskinson, E.; Packard, R. E. [Department of Physics, University of California, Berkeley, CA 94720 (United States)

2006-09-07T23:59:59.000Z

204

Remaining Sites Verification Package for the 100-F-50 Stormwater Runoff Culvert, Waste Site Reclassification Form 2007-001  

SciTech Connect

The 100-F-50 waste site, part of the 100-FR-2 Operable Unit, is a steel stormwater runoff culvert that runs between two railroad grades in the south-central portion of the 100-F Area. The culvert exiting the west side of the railroad grade is mostly encased in concrete and surrounded by a concrete stormwater collection depression partially filled with soil and vegetation. The drain pipe exiting the east side of the railroad grade embankment is partially filled with soil and rocks. The 100-F-50 stormwater diversion culvert confirmatory sampling results support a reclassification of this site to no action. The current site conditions achieve the remedial action objectives and 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

2008-04-15T23:59:59.000Z

205

WEAK HARD X-RAY EMISSION FROM TWO BROAD ABSORPTION LINE QUASARS OBSERVED WITH NuSTAR: COMPTON-THICK ABSORPTION OR INTRINSIC X-RAY WEAKNESS?  

SciTech Connect

We present Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray observations of two X-ray weak broad absorption line (BAL) quasars, PG 1004+130 (radio loud) and PG 1700+518 (radio quiet). Many BAL quasars appear X-ray weak, probably due to absorption by the shielding gas between the nucleus and the accretion-disk wind. The two targets are among the optically brightest BAL quasars, yet they are known to be significantly X-ray weak at rest-frame 2-10 keV (16-120 times fainter than typical quasars). We would expect to obtain Almost-Equal-To 400-600 hard X-ray ({approx}> 10 keV) photons with NuSTAR, provided that these photons are not significantly absorbed (N{sub H} {approx}< 10{sup 24} cm{sup -2}). However, both BAL quasars are only detected in the softer NuSTAR bands (e.g., 4-20 keV) but not in its harder bands (e.g., 20-30 keV), suggesting that either the shielding gas is highly Compton-thick or the two targets are intrinsically X-ray weak. We constrain the column densities for both to be N{sub H} Almost-Equal-To 7 Multiplication-Sign 10{sup 24} cm{sup -2} if the weak hard X-ray emission is caused by obscuration from the shielding gas. We discuss a few possibilities for how PG 1004+130 could have Compton-thick shielding gas without strong Fe K{alpha} line emission; dilution from jet-linked X-ray emission is one likely explanation. We also discuss the intrinsic X-ray weakness scenario based on a coronal-quenching model relevant to the shielding gas and disk wind of BAL quasars. Motivated by our NuSTAR results, we perform a Chandra stacking analysis with the Large Bright Quasar Survey BAL quasar sample and place statistical constraints upon the fraction of intrinsically X-ray weak BAL quasars; this fraction is likely 17%-40%.

Luo, B.; Brandt, W. N. [Department of Astronomy and Astrophysics, 525 Davey Lab, The Pennsylvania State University, University Park, PA 16802 (United States); Alexander, D. M.; Hickox, R. [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Harrison, F. A.; Fuerst, F.; Grefenstette, B. W.; Madsen, K. K. [Cahill Center for Astronomy and Astrophysics, California Institute of Technology, Pasadena, CA 91125 (United States); Stern, D. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Bauer, F. E. [Departamento de Astronomia y Astrofisica, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile); Boggs, S. E.; Craig, W. W. [Space Sciences Laboratory, University of California, Berkeley, CA 94720 (United States); Christensen, F. E. [DTU Space-National Space Institute, Technical University of Denmark, Elektrovej 327, DK-2800 Lyngby (Denmark); Comastri, A. [INAF-Osservatorio Astronomico di Bologna, Via Ranzani 1, I-40127 Bologna (Italy); Fabian, A. C. [Institute of Astronomy, Madingley Road, Cambridge CB3 0HA (United Kingdom); Farrah, D. [Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States); Fiore, F. [Osservatorio Astronomico di Roma, via Frascati 33, I-00040 Monteporzio Catone (Italy); Hailey, C. J. [Columbia Astrophysics Laboratory, Columbia University, New York, NY 10027 (United States); Matt, G. [Dipartimento di Matematica e Fisica, Universita degli Studi Roma Tre, via della Vasca Navale 84, I-00146 Roma (Italy); Ogle, P. [IPAC, California Institute of Technology, Mail Code 220-6, Pasadena, CA 91125 (United States); and others

2013-08-01T23:59:59.000Z

206

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

207

Microphysical Characteristics of a Well-Developed Weak Echo Region in a High Plains Supercell Thunderstorm  

Science Conference Proceedings (OSTI)

Microphysical measurements in and near the weak echo region of a supercell thunderstorm are discussed. The observations were made in southeastern Montana with an armored T-28 aircraft, which has the capability to measure hydrometeors over almost ...

Dennis J. Musil; Andrew J. Heymsfield; Paul L. Smith

1986-07-01T23:59:59.000Z

208

On death ground : why weak states resist great powers explaining coercion failure in asymmetric interstate conflict  

E-Print Network (OSTI)

Great Powers often adopt coercive strategies, threatening or using limited force to convince weak states to comply with their demands. While coercive strategies have succeeded in just over half of asymmetric crises since ...

Haun, Phil M

2010-01-01T23:59:59.000Z

209

An Analysis of DES Cluster Simulations through the IMCAT and Shapelets Weak Lensing Pipelines  

E-Print Network (OSTI)

We have run two completely independent weak lensing analysis pipelines on a set of realistic simulated images of a massive galaxy cluster with a singular isothermal sphere profile (galaxy velocity dispersion sigma_v=1250 km/ sec). The suite of images was constructed using the simulation tools developed by the Dark Energy Survey. We find that both weak lensing pipelines can accurately recover the velocity dispersion of our simulated clusters, suggesting that current weak lensing tools are accurate enough for measuring the shear profile of massive clusters in upcoming large photometric surveys. We also demonstrate how choices of some cuts influence the final shear profile and sigma_v measurement. Analogously to the STEP program, we make all of these cluster simulation images publically available for other groups to analyze through their own weak lensing pipelines.

Gill, M S S; Draskovic, J P; Honscheid, K; Lin, H; Kuropatkin, N; Martini, P; Peeples, M; Rozo, E; Smith, G N; Weinberg, D H

2009-01-01T23:59:59.000Z

210

Process for loading weak-acid ion exchange resin with uranium  

DOE Patents (OSTI)

A method for loading ion exchange resins is described. The process comprises contacting a weak acid cation exchange resin in the ammonium form with a uranyl fluoride salt solution.

Notz, Karl J. (Oak Ridge, TN)

1976-01-01T23:59:59.000Z

211

A Case Study of Heavy Rainfall Associated with Weak Cyclogenesis in the Northwest Gulf of Mexico  

Science Conference Proceedings (OSTI)

This paper describes a case of unexpected weak cyclogenesis over the northwestern Gulf of Mexico from 16 to 19 September 1984 based upon manually prepared and European Centre for Medium-Range Weather Forecasts (ECMWF) gridded analyses. Noteworthy ...

Lance F. Bosart; Chung-Chieng Lai; Robert A. Weisman

1992-11-01T23:59:59.000Z

212

Simulation of Coherent Doppler Lidar Performance in the Weak-Signal Regime  

Science Conference Proceedings (OSTI)

The performance of coherent Doppler lidar in the weak-signal regime is investigated by computer simulations of velocity estimators that accumulate the signal from N pulses of zero-mean complex Gaussian stationary lidar data described by a ...

Rod Frehlich

1996-06-01T23:59:59.000Z

213

Residual Sediment Fluxes in Weakly-to-Periodically Stratified Estuaries and Tidal Inlets  

Science Conference Proceedings (OSTI)

In this idealized numerical modeling study, the composition of residual sediment fluxes in energetic (e.g., weakly or periodically stratified) tidal estuaries is investigated by means of one-dimensional water column models, with some focus on the ...

Hans Burchard; Henk M. Schuttelaars; W. Rockwell Geyer

2013-09-01T23:59:59.000Z

214

Study of Radiative and Turbulent Processes in the Stable Boundary Layer under Weak Wind Conditions  

Science Conference Proceedings (OSTI)

The role of radiation and turbulence was studied in a weak wind nocturnal inversion layer using a one-dimensional model. In contrast to a strong wind stable boundary layer where cooling within the surface inversion layer is dominated by ...

S. G. Gopalakrishnan; Maithili Sharan; R. T. McNider; M. P. Singh

1998-03-01T23:59:59.000Z

215

On the maintenance of weak meridional temperature gradients during warm climates  

E-Print Network (OSTI)

This thesis examines the dynamics of equable climates. The underlying physics of two mechanisms by which weak meridional temperature gradients might be maintained are studied. First, I examine the evolution of stratospheric ...

Korty, Robert Lindsay

2005-01-01T23:59:59.000Z

216

Reorganization of Tropical Climate during El Niño: A Weak Temperature Gradient Approach  

Science Conference Proceedings (OSTI)

The applicability of a weak temperature gradient (WTG) formulation for the reorganization of tropical climate during El Niño–Southern Oscillation (ENSO) events is investigated. This idealized dynamical framework solves for the divergent portion ...

Benjamin R. Lintner; John C. H. Chiang

2005-12-01T23:59:59.000Z

217

Empirical Orthogonal Function Analysis of the Weakly Convective Atmospheric Boundary Layer. Part I: Eddy Structures  

Science Conference Proceedings (OSTI)

Three-dimensional empirical orthogonal functions (EOFs), representing atmospheric turbulence structures, are determined from a large-eddy simulation of a weakly convective, planetary boundary layer. The method of analysis is based on Lumley's ...

D. Keith Wilson

1996-03-01T23:59:59.000Z

218

Kinematic, Dynamic, and Thermodynamic Analysis of a Weakly Sheared Severe Thunderstorm over Northern Alabama  

Science Conference Proceedings (OSTI)

A kinematic, dynamic, and thermodynamic analysis of a weakly sheared, airmass thunderstorm observed over northern Alabama is presented. Most notable is the fact that the dominant cell in this storm closely resembles the Byers and Braham model for ...

David E. Kingsmill; Roger M. Wakimoto

1991-02-01T23:59:59.000Z

219

Residual Currents Induced by Asymmetric Tidal Mixing in Weakly Stratified Narrow Estuaries  

Science Conference Proceedings (OSTI)

Residual currents induced by asymmetric tidal mixing were examined for weakly stratified, narrow estuaries using analytical and numerical models. The analytical model is an extension of the work of R. K. McCarthy, with the addition of tidal ...

Peng Cheng; Arnoldo Valle-Levinson; Huib E. de Swart

2010-09-01T23:59:59.000Z

220

Mean Structure of the Nocturnal Boundary Layer under Strong and Weak Wind Conditions: EPRI Case Study  

Science Conference Proceedings (OSTI)

The major objective of this study was to analyze the mean structure and evolution of the nocturnal boundary layer (NBL) under strong and weak wind conditions. Meteorological data collected during the plume-validation experiment conducted by the ...

T. B. P. S. Rama V. Krishna; Maithili Sharan; S. G. Gopalakrishnan; Aditi

2003-07-01T23:59:59.000Z

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

Modeling and Parameterization of Near-Source Diffusion in Weak Winds  

Science Conference Proceedings (OSTI)

A critical assessment is made of several different approaches that can be used for modeling near-source diffusion in weak winds, including the calm condition. For the convective boundary layer, the statistical theory approach is used in ...

S. Pal Arya

1995-05-01T23:59:59.000Z

222

A Simple Model of a Convectively Coupled Walker Circulation Using the Weak Temperature Gradient Approximation  

Science Conference Proceedings (OSTI)

An idealized model of a Walker circulation based on the weak temperature gradient (WTG) approximation and a single baroclinic vertical mode for all fields is analyzed. The circulation is forced by a sinusoidal variation of sea surface temperature ...

Christopher S. Bretherton; Adam H. Sobel

2002-10-01T23:59:59.000Z

223

Residual Sediment Fluxes in Weakly-to-Periodically Stratified Estuaries and Tidal Inlets  

Science Conference Proceedings (OSTI)

In this idealized numerical modeling study, the composition of residual sediment fluxes in energetic (e.g., weakly stratified or periodically stratified) tidal estuaries is investigated by means of one-dimensional water column models, with some ...

Hans Burchard; Henk M. Schuttelaars; W. Rockwell Geyer

224

Weak Gravity Conjecture and Holographic Dark Energy Model with Interaction and Spatial Curvature  

E-Print Network (OSTI)

In the paper, we apply the weak gravity conjecture to the holographic quintessence model of dark energy. Three different holographic dark energy models are considered: without the interaction in the non-flat universe; with interaction in the flat universe; with interaction in the non-flat universe. We find that only in the models with the spatial curvature and interaction term proportional to the energy density of matter, it is possible for the weak gravity conjecture to be satisfied.

Cheng-Yi Sun

2010-07-09T23:59:59.000Z

225

Dependence of waterflood remaining oil saturation on relative permeability, capillary pressure, and reservoir parameters in mixed-wet turbidite sands  

SciTech Connect

The dependence of waterflood oil recovery on relative permeability, capillary pressure, and reservoir parameters was investigated by numerical simulation. The relative permeability and capillary pressure curves were based on laboratory measurements on unconsolidated sands. The water-wet case is based on the assumption that the system is water-wet and measurements were made with refined oil. The mixed-wet case assumed that the system is mixed-wet and restored-state measurements were made with crude oil. The reservoir model was a prototype turbidite sand with a range of thickness and permeability values. The economic oil recovery was based on an economic limit water cut of 50%. The remaining oil saturation (ROS) in the swept region for the water-wet cases was close to the residual oil saturation. The ROS of the mixed-wet cases ranged from low values near the residual oil saturation to far above the residual oil saturation. It is dependent on the reservoir parameters that govern (1) the vertical film surface drainage of oil by gravity, (2) accumulation of a high oil saturation and thus a high relative permeability under the caprock, and (3) up-dip migration of the oil that accumulated under the caprock. The dependence on the reservoir parameters can be summarized by dimensionless groups. There is a dimensionless time for the vertical displacement of oil by gravity. The accumulation of a high oil saturation under the caprock is dependent on the ratio of the capillary transition zone and the sand thickness. The updip migration is dependent on a combination of the gravity number and the endpoint mobility ratio.

Hirasaki, G.J. [Rice Univ., Houston, TX (United States)

1996-05-01T23:59:59.000Z

226

Old Socorro Mission: an osteobiological analysis of the skeletal remains from the 1982-1985 field excavations  

E-Print Network (OSTI)

The skeletal remains of 51 individuals from the Old Socorro Mission (OSM) were analyzed to provide both a demographic profile and an assessment of their health. According to Spanish documents, the mission, which was in use from 1684 to 1829, served the Spanish families and Piro Indians who were living at the settlement. Of the 51 burials recovered, 23 of the adults were identifiable as to sex: 15 males and 8 females. All age categories were represented: one fetal, 15 infants, five in early childhood, three in late childhood, one adolescent/adult, 19 adults, and seven old adults. Physical characteristics, such as stature and robusticity were also determined. Stature estimates of the OSM sample did not differ significantly from other Indian groups from the region. Visual observation of the OSM sample indicated that the population appeared to be sexually robust. The males and females displayed a pronounced degree of skeletal dimorphism both in stature and other discrete traits. Examination of the dentition revealed numerous pathological conditions. The OSM population displayed a high frequency of cariogenic activity, enamel hypoplasia, abscessing, antemortem tooth loss, alveolar resorption, and periodontal infection. Dental anomalies, shoveling and enamel wrinkling, were also present. The OSM sample revealed numerous skeletal pathological conditions. Degenerative joint disease, infectious disease, neoplasias, traumatic injuries, and skeletal dysplasias were evident in both sexes. Anomalous features were also identified, such as developmental and cultural modifications. The high frequency of developmental variations is suggestive of a small breeding population with restricted gene flow. The lack of skeletal lesions with dietary imbalances suggests that the OSM people were well nourished. However, the high incidence of degenerative joint disease suggests that the Piro Indians. suffered a great amount of physical stress.

Raisor, Michelle Jeanette

1993-01-01T23:59:59.000Z

227

Session 35 - Panel: Remaining US Disposition Issues for Orphan or Small Volume Low Level and Low Level Mixed Waste Streams  

Science Conference Proceedings (OSTI)

Faced with closure schedules as a driving force, significant progress has been made during the last 2 years on the disposition of DOE mixed waste streams thought previously to be problematic. Generators, the Department of Energy and commercial vendors have combined to develop unique disposition paths for former orphan streams. Recent successes and remaining issues will be discussed. The session will also provide an opportunity for Federal agencies to share lessons learned on low- level and mixed low-level waste challenges and identify opportunities for future collaboration. This panel discussion was organized by PAC member Dick Blauvelt, Navarro Research and Engineering Inc who served as co-chair along with Dave Eaton from INL. In addition, George Antonucci, Duratek Barnwell and Rich Conley, AFSC were invited members of the audience, prepared to contribute the Barnwell and DOD perspective to the issues as needed. Mr. Small provide information regarding the five year 20K M3 window of opportunity at the Nevada Test Site for DOE contractors to dispose of mixed waste that cannot be received at the Energy Solutions (Envirocare) site in Utah because of activity levels. He provided a summary of the waste acceptance criteria and the process sites must follow to be certified to ship. When the volume limit or time limit is met, the site will undergo a RCRA closure. Ms. Gelles summarized the status of the orphan issues, commercial options and the impact of the EM reorganization on her program. She also announced that there would be a follow-on meeting in 2006 to the very successful St. Louis meeting of last year. It will probably take place in Chicago in July. Details to be announced. Mr. McKenney discussed progress made at the Hanford Reservation regarding disposal of their mixed waste inventory. The news is good for the Hanford site but not good for the rest of the DOE complex since shipment for out of state of both low level and low level mixed waste will continue to be prohibited until the completion of a new NEPA study. This is anticipated to take several years. Bill Franz from Portsmouth and Dave Eaton representing the INL provided the audience with information regarding some of the problematic mixed waste streams at their respective sites. Portsmouth has some unique radiological issues with isotopes such as Tc-99 while the INL is trying to deal with mixed waste in the 10-100 nCi/g range. Kaylin Loveland spoke of the new,Energy Solutions organization and provided information on mixed waste treatment capabilities at the Clive site. Mike Lauer described the licensing activities at the WCS site in Texas where they are trying to eventually have disposal capabilities for Class A, B and C mixed waste from both DOE and the commercial sector. The audience included about 75 WM'06 attendees who asked some excellent questions and provided an active and informative exchange of information on the topic. (authors)

Blauvelt, Richard [Navarro Engineering Research Inc. (United States); Small, Ken [Doe Nevada (United States); Gelles, Christine [DOE EM HQ (United States); McKenney, Dale [Fluor Hanford (United States); Franz, Bill [LATA Portsmouth (United States); Loveland, Kaylin [Energy Solutions Inc. (United States); Lauer, Mike [Waste Control Specialists (United States)

2006-07-01T23:59:59.000Z

228

Weak Hopf Algebras unify the Hennings-Kauffman-Radford and the Reshetikhin-Turaev invariant  

E-Print Network (OSTI)

We present an invariant of connected and oriented closed 3-manifolds based on a coribbon Weak Hopf Algebra H with a suitable left-integral. Our invariant can be understood as the generalization to Weak Hopf Algebras of the Hennings-Kauffman-Radford evaluation of an unoriented framed link using a dual quantum-trace. This quantum trace satisfies conditions that render the link evaluation invariant under Kirby moves. If H is a suitable finite-dimensional Hopf algebra (not weak), our invariant reduces to the Kauffman-Radford invariant for the dual of H. If H is the Weak Hopf Algebra Tannaka-Krein reconstructed from a modular category C, our invariant agrees with the Reshetikhin-Turaev invariant. In particular, the proof of invariance of the Reshetikhin-Turaev invariant becomes as simple as that of the Kauffman-Radford invariant. Modularity of C is only used once in order to show that the invariant is non-zero; apart from this, a fusion category with ribbon structure would be sufficient. Our generalization of the Kauffman-Radford invariant for a Weak Hopf Algebra H and the Reshetikhin-Turaev invariant for its category of finite-dimensional comodules C=M^H always agree by construction. There is no need to consider a quotient of the representation category modulo 'negligible morphisms' at any stage, and our construction contains the Reshetikhin-Turaev invariant for an arbitrary modular category C, whether its relationship with some quantum group is known or not.

Hendryk Pfeiffer

2011-05-02T23:59:59.000Z

229

Detecting Weak Interactions between Au- and Gas Molecules: A Photoelectron Spectroscopic and Ab Initio Study  

DOE Green Energy (OSTI)

In this communication, we report a joint experimental and theoretical study of the interactions between gold anion, Au-, and an NG atom (NG ) Ne, Ar, Kr, Xe) or a molecule of O2, CH4, or H2O. Except for the Au- · · ·H2O interaction, which is comparable to strong hydrogen bonding, all of these are weak charge-induced intermolecular interactions. The observation of a weakly bound Au(O2)- complex shows the inertness of Au- toward O2, in line with the previous observation of the odd-even effect in the reactions of Aun - clusters and O2. By comparing with results of high-level ab initio calculations, we demonstrate that anion PES is a good technique for probing weak charge-induced intermolecular interactions.

Gao, Yi; Huang, Wei; Woodford, Jeffrey; Wang, Lai S.; Zeng, Xiao Cheng

2009-06-19T23:59:59.000Z

230

Anomalous skin effects in relativistic parallel propagating weakly magnetized electron plasma waves  

SciTech Connect

Fully relativistic analysis of anomalous skin effects for parallel propagating waves in a weakly magnetized electron plasma is presented and general expressions for longitudinal and transverse permittivites are derived. It is found that the penetration depth for R- and L-waves increases as we move from non-relativistic to highly relativistic regime. The ambient magnetic field reduces/enhances the skin effects for R-wave/L-wave as the strength of the field is increased. In general, the weak magnetic field effects are pronounced for the weakly relativistic regime as compared with other relativistic cases. The results are also graphically illustrated. On switching off the magnetic field, previous results for field free case are retrieved [A. F. Alexandrov, A. S. Bogdankevich, and A. A. Rukhadze, Priniples of Plasma Electrodynamics (Springer-Verlag, Berlin, Heidelberg, 1984), Vol. 9, p. 106].

Abbas, Gohar; Bashir, M. F. [Salam Chair in Physics, G. C. University, Lahore 54000 (Pakistan); Department of Physics, G. C. University, Lahore 54000 (Pakistan); Murtaza, G. [Salam Chair in Physics, G. C. University, Lahore 54000 (Pakistan)

2011-10-15T23:59:59.000Z

231

Binary Bose-Einstein Condensate Mixtures in Weakly and Strongly Segregated Phases  

E-Print Network (OSTI)

We perform a mean-field study of the binary Bose-Einstein Condensate mixtures as the function of the mutual repulsive interaction strength. In the phase segregated regime, we find that there are two distinct phases: the weakly segregated phase characterized by a ‘penetration depth ’ and the strongly segregated phase by a healing length. In the weakly segregated phase the symmetry of the shape of each condensate will not take that of the trap because of the finite surface tension, but their total density profile still does. In the strongly segregated phase even the total density profile takes a different symmetry from that of the trap because of the mutual exclusion of the condensates. The lower critical condensate atom number to observe the complete phase segregation is discussed. A comparison to recent experimental data suggests that the weakly segregated phase has been observed. PACS#: 03.75.Fi 1

P. Ao; S. T. Chui

2008-01-01T23:59:59.000Z

232

Weak Bonds from a Semilocal Density Functional with the Right Ingredients  

E-Print Network (OSTI)

Computationally-efficient semilocal approximations of density functional theory at the level of the local spin density approximation (LSDA) or generalized gradient approximation (GGA) poorly describe weak interactions. We show improved descriptions for weak bonds (without loss of accuracy for strong ones) from a newly-developed semilocal meta-GGA (MGGA), by applying it to: 1) the binding energy curve of graphene adsorbed on a Ni (111) surface, where both chemi- and physisorption minima are present; 2) stacking of DNA/RNA nucleobases. We argue that this improvement comes from using the right MGGA dimensionless ingredient to recognize all degrees of orbital overlap.

Sun, Jianwei; Fang, Yuan; Haunschild, Robin; Hao, Pan; Ruzsinszky, Adrienn; Csonka, Gabor I; Scuseria, Gustavo E; Perdew, John P

2013-01-01T23:59:59.000Z

233

Weak interaction rates for Kr and Sr waiting-point nuclei under rp-process conditions  

E-Print Network (OSTI)

Weak interaction rates are studied in neutron deficient Kr and Sr waiting-point isotopes in ranges of densities and temperatures relevant for the rp-process. The nuclear structure is described within a microscopic model (deformed QRPA) that reproduces not only the half-lives but also the Gamow-Teller strength distributions recently measured. The various sensitivities of the decay rates to both density and temperature are discussed. Continuum electron capture is shown to contribute significantly to the weak rates at rp-process conditions.

P. Sarriguren

2009-10-06T23:59:59.000Z

234

QCD Corrections to Vector Boson Pair Production via Weak Boson Fusion  

E-Print Network (OSTI)

NLO-QCD corrections to vector boson pair production via weak boson fusion have recently been calculated and implemented into flexible parton-level Monte-Carlo programs. These allow for the computation of cross sections and kinematical distributions within realistic experimental cuts. We summarize the basic elements of the calculation and review phenomenological results for the LHC.

B. Jager; C. Oleari; D. Zeppenfeld

2006-08-24T23:59:59.000Z

235

Fuzzy programming problem in the weakly structurable dynamic system and choice of decisions  

Science Conference Proceedings (OSTI)

This work deals with the problems of the Weakly Structurable Continuous Dynamic System (WSCDS) optimal control and briefly discuss the results developed by G. Sirbiladze [17]. Sufficient and necessary conditions are presented for the existence of an ... Keywords: Bellman's optimality principle, WSCDS, extended extremal fuzzy measures, fuzzy dynamic systems, fuzzy gain-loss process, fuzzy optimal control, sugeno type extremal integrals

Gia Sirbiladze; Anna Sikharulidze; Natia Sirbiladze

2008-11-01T23:59:59.000Z

236

Power quality analysis of wind generator connected to the weak grid during low wind speed  

Science Conference Proceedings (OSTI)

Power quality analysis based on measurements performed on wind generator during low wind speed is presented in the paper. Wind generator is connected via 10 kV cable to the distribution network, where grid is weak with low value of short-circuit power. ... Keywords: distribution network, harmonics, power quality, wind speed, wind turbine

Aleksandar Nikolic; Branka Kostic; Maja Markovic; Sasa Minic; Srdjan Milosavljevic

2011-07-01T23:59:59.000Z

237

The Passage of a Weak Thunderstorn Downburst over an Instrumented Tower  

Science Conference Proceedings (OSTI)

On 5 November 1977 a weak downburst associated with a multicell storm passed over an instrumented tower at Bald Hills, a suburb of Brisbane, Australia. Associated with the thunderstorm was a dome of cold air estimated to be 1200 to 1800 m deep. ...

Douglas J. Sherman

1987-06-01T23:59:59.000Z

238

Fuzzy Rule–Based Approach for Detection of Bounded Weak-Echo Regions in Radar Images  

Science Conference Proceedings (OSTI)

A method for the detection of a bounded weak-echo region (BWER) within a storm structure that can help in the prediction of severe weather phenomena is presented. A fuzzy rule–based approach that takes care of the various uncertainties associated ...

Nikhil R. Pal; Achintya K. Mandal; Srimanta Pal; Jyotirmay Das; V. Lakshmanan

2006-09-01T23:59:59.000Z

239

Surface Science Prospectives Weakly bound buffer layers: A versatile template for metallic nano-clusters  

E-Print Network (OSTI)

Surface Science Prospectives Weakly bound buffer layers: A versatile template for metallic nano layers Metallic nano-crystals Film patterning Laser ablation a b s t r a c t Buffer layers composed controlled growth of nano-clusters and for patterning of thin metallic films. Metallic nano-crystals can

Asscher, Micha

240

Comment on "Weak instrument robust tests in GMM and the new Keynesian Phillips curve"  

E-Print Network (OSTI)

Comment on "Weak instrument robust tests in GMM and the new Keynesian Phillips curve", Frank Kleibergen, Sophocles Mavroeidis. Journal of Business and Economic Statistics. July 1, 2009, 27(3): 293-311. doi:10.1198/jbes.2009.08280.

Mikusheva, Anna

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
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241

Stability boundary analysis of the dynamic voltage restorer in weak systems with dynamic loads  

Science Conference Proceedings (OSTI)

In this contribution, a stability analysis for a dynamic voltage restorer (DVR) connected to a weak ac system containing a dynamic load is presented using continuation techniques and bifurcation theory. The system dynamics are explored through the continuation ... Keywords: DVR, Floquet multiplier, active filter, continuation techniques, iterative map, point common coupling, power converter, stability regions, switching process

Juan Segundo-Ramírez; Aurelio Medina; Arindam Ghosh; Gerard Ledwich

2012-06-01T23:59:59.000Z

242

The Very Stable Boundary Layer on Nights with Weak Low-Level Jets  

Science Conference Proceedings (OSTI)

The light-wind, clear-sky, very stable boundary layer (vSBL) is characterized by large values of bulk Richardson number. The light winds produce weak shear, turbulence, and mixing, and resulting strong temperature gradients near the surface. Here ...

Robert M. Banta; Larry Mahrt; Dean Vickers; Jielun Sun; Ben B. Balsley; Yelena L. Pichugina; Eric J. Williams

2007-09-01T23:59:59.000Z

243

Longitudinal singular response of dusty plasma medium in weak and strong coupling limits  

Science Conference Proceedings (OSTI)

The longitudinal response of a dusty plasma medium in both weak and strong coupling limits has been investigated in detail using analytic as well as numerical techniques. In particular, studies on singular response of the medium have been specifically investigated here. A proper Galilean invariant form of the generalized hydrodynamic fluid model has been adopted for the description of the dusty plasma medium. For weak non-linear response, analytic reductive perturbative approach has been adopted. It is well known that in the weak coupling regime for the dusty plasma medium, such an analysis leads to the Korteweg-de Vries equation (KdV) equation and predicts the existence of localized smooth soliton solutions. We show that the strongly coupled dust fluid with the correct Galilean invariant form does not follow the KdV paradigm. Instead, it reduces to the form of Hunter-Saxton equation, which does not permit soliton solutions. The system in this case displays singular response with both conservative as well as dissipative attributes. At arbitrary high amplitudes, the existence and spontaneous formation of sharply peaked cusp structures in both weak and strong coupling regimes has been demonstrated numerically.

Kumar Tiwari, Sanat; Das, Amita; Kaw, Predhiman; Sen, Abhijit [Institute for Plasma Research, Bhat, Gandhinagar - 382428 (India)

2012-01-15T23:59:59.000Z

244

Cross Terms and Weak Frequency Dependent Signals in the CMB Sky  

E-Print Network (OSTI)

In this paper, we study the amplification of weak frequency dependent signals in the CMB sky due to their cross correlation to intrinsic anisotropies. In particular, we center our attention on mechanisms generating some weak signal, of peculiar spectral behaviour, such as resonant scattering in ionic, atomic or molecular lines, thermal SZ effect or extragalactic foreground emissions, whose typical amplitude (denoted by $\\epsilon$) is sufficiently smaller than the intrinsic CMB fluctuations. We find that all these effects involve either the autocorrelation of anisotropies generated during recombination ($z_{rec}$) or the cross-correlation of those anisotropies with fluctuations arising at some later redshift $z_i$. The degree of this correlation can be computed under the assumption that density fluctuations were generated as standard inflationary models dictate and that they evolved in time according to linear theory. In case that the weak signal is frequency dependent, we show that, by substracting power spectra at different frequencies, it is possible to avoid the limit associated to Cosmic Variance and unveil weaker terms linear in $\\epsilon$. We find that the correlation term shows a different spectral dependence than the squared ($\\propto \\epsilon^2$) term considered usually, making its extraction particularly straightforward for the thermal SZ effect. Furthermore, we find that in most cases the correlation terms are particularly relevant at low multipoles and must be taken into account when characterising the power spectrum associated to weak signals in the large angular scales.

C. Hernandez-Monteagudo; R. A. Sunyaev; MPA; IKI

2004-05-25T23:59:59.000Z

245

Wind turbine aerodynamics using ALE---VMS: validation and the role of weakly enforced boundary conditions  

Science Conference Proceedings (OSTI)

In this article we present a validation study involving the full-scale NREL Phase VI two-bladed wind turbine rotor. The ALE---VMS formulation of aerodynamics, based on the Navier---Stokes equations of incompressible flows, is employed in conjunction ... Keywords: ALE---VMS, Finite elements, NREL 5MW offshore, NREL Phase VI, Weakly enforced essential boundary conditions, Wind turbine aerodynamics

Ming-Chen Hsu; Ido Akkerman; Yuri Bazilevs

2012-10-01T23:59:59.000Z

246

Weak aggregating algorithm for the distribution-free perishable inventory problem  

Science Conference Proceedings (OSTI)

We formulate the multiperiod, distribution-free perishable inventory problem as a problem of prediction with expert advice and apply an online learning method (the Weak Aggregating Algorithm) to solve it. We show that the asymptotic average performance ... Keywords: Aggregating algorithm, Newsvendor problem, Online learning

Tatsiana Levina; Yuri Levin; Jeff Mcgill; Mikhail Nediak; Vladimir Vovk

2010-11-01T23:59:59.000Z

247

Parabolic lines and caustics in weakly anisotropic solids 9iFODY##9DYU\\XN  

E-Print Network (OSTI)

117 Parabolic lines and caustics in weakly anisotropic solids 9iFODY##9DYU\\þXN *HRSK@ig.cas.cz Summary The behaviour of parabolic lines and caustics in anisotropic solids can be, in general, very, no parabolic lines appear on the S1 slowness sheet. Consequently, the S1 wave sheet displays no caustics

Cerveny, Vlastislav

248

Weak Hopf Algebras unify the Hennings-Kauffman-Radford and the Reshetikhin-Turaev invariant  

E-Print Network (OSTI)

We present an invariant of connected and oriented closed 3-manifolds based on a coribbon Weak Hopf Algebra H with a suitable left-integral. Our invariant can be understood as the generalization to Weak Hopf Algebras of the Hennings-Kauffman-Radford evaluation of an unoriented framed link using a dual quantum-trace. This quantum trace satisfies conditions that render the link evaluation invariant under Kirby moves. If H is a suitable finite-dimensional Hopf algebra (not weak), our invariant reduces to the Kauffman-Radford invariant for the dual of H. If H is the Weak Hopf Algebra Tannaka-Krein reconstructed from a modular category C, our invariant agrees with the Reshetikhin-Turaev invariant. In particular, the proof of invariance of the Reshetikhin-Turaev invariant becomes as simple as that of the Kauffman-Radford invariant. Modularity of C is only used once in order to show that the invariant is non-zero; apart from this, a fusion category with ribbon structure would be sufficient. Our generalization of the ...

Pfeiffer, Hendryk

2011-01-01T23:59:59.000Z

249

The Role of Latent Heat Release in the Evolution of a Weak Extratropical Cyclone  

Science Conference Proceedings (OSTI)

A study of the sensitivity of a weak winter extratropical cyclone to latent heat release (LHR) is presented using 48-h simulations of the cyclone's evolution derived from three versions of the LFM model: a MOIST simulation in which full model ...

John E. Zimmerman; Phillip J. Smith; David R. Smith

1989-05-01T23:59:59.000Z

250

Forecast of Weak Electrical Signals in Dahlia pinnata by Neural Networks  

Science Conference Proceedings (OSTI)

Signals of electrics in Dahlia pinnata were tested by a touching test system of self-made double shields with platinum sensors and tested data of electrical signals denoised by the wavelet soft threshold and also using Gaussian radial base function (RBF) ... Keywords: radial base function (RBF) neural network, wavelet soft threshold denoising, plant weak electrical signal, intelligent control, Dahlia pinnata

Lanzhou Wang; Jinli Ding

2010-05-01T23:59:59.000Z

251

An Application of a Weakly Constrained 4DVAR to Satellite Data Assimilation and Heavy Rainfall Simulation  

Science Conference Proceedings (OSTI)

In this paper a simple weakly constrained four-dimensional variational data assimilation (4DVAR) technique (W4DVAR) is used in the assimilation of retrieved satellite data for a heavy rainfall simulation. The W4DVAR and the strongly constrained ...

Mi-Seon Lee; Dong-Kyou Lee

2003-09-01T23:59:59.000Z

252

Comparative Evaluation of Eddy Exchange Coefficients for Strong and Weak Wind Stable Boundary Layer Modeling  

Science Conference Proceedings (OSTI)

Five local K-closure formulations and a TKE closure were incorporated in a one-dimensional version of the Pielke’s model, and a comparative evaluation of the closure schemes was made for strong and weak wind stable boundary layer (SBL). The ...

Maithili Sharan; S. G. Gopalakrishnan

1997-05-01T23:59:59.000Z

253

AvrRpm1 Missense Mutations Weakly Activate RPS2-Mediated Immune Response in Arabidopsis thaliana  

E-Print Network (OSTI)

AvrRpm1 Missense Mutations Weakly Activate RPS2- Mediated Immune Response in Arabidopsis thaliana Plants recognize microbes via specific pattern recognition receptors that are activated by microbe to pathogen proliferation. Plant pathogenic bacteria like Pseudomonas syringae utilize a type III secretion

Dangl, Jeff

254

A comment about the existence of a weak solution for a non linear wave equation damped propagation  

E-Print Network (OSTI)

We give a proof for the existence of a weak solution on the initial-value problem of a non-linear damped propagation

Luiz C. L. Botelho

2009-08-31T23:59:59.000Z

255

Weak turbulence and collapses in the Majda-Mc-Laughlin-Tabak equation: Fluxes in wavenumber and in amplitude space  

E-Print Network (OSTI)

The turbulent energy flow of the onedimensional Majda-McLaughlin-Tabak equation is studied numerically. The system exhibits weak turbulence for weak driving forces, while weak turbulence coexists with strongly nonlinear intermittent collapses when the system is strongly driven. These two types of dynamics can be distinguished by their energy and particle fluxes. The weakly turbulent process can be characterized by fluxes in wavenumber space, while additional fluxes in amplitude space emerge in the intermittent process. The particle flux is directed from low amplitudes towards high amplitudes, and the energy flows in the opposite direction.

Benno Rumpf Laura Biven

2005-03-04T23:59:59.000Z

256

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.

Srivastava, Y N; Larsen, L

2008-01-01T23:59:59.000Z

257

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

258

Complementarity of weak lensing and peculiar velocity measurements in testing general relativity  

SciTech Connect

We explore the complementarity of weak lensing and galaxy peculiar velocity measurements to better constrain modifications to General Relativity. We find no evidence for deviations from General Relativity on cosmological scales from a combination of peculiar velocity measurements (for Luminous Red Galaxies in the Sloan Digital Sky Survey) with weak lensing measurements (from the Canadian France Hawaii Telescope Legacy Survey). We provide a Fisher error forecast for a Euclid-like space-based survey including both lensing and peculiar velocity measurements and show that the expected constraints on modified gravity will be at least an order of magnitude better than with present data, i.e. we will obtain {approx_equal}5% errors on the modified gravity parametrization described here. We also present a model-independent method for constraining modified gravity parameters using tomographic peculiar velocity information, and apply this methodology to the present data set.

Song, Yong-Seon [Korea Institute for Advanced Study, Dongdaemun-gu, Seoul 130-722 (Korea, Republic of); Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX (United Kingdom); Zhao Gongbo; Bacon, David; Koyama, Kazuya; Nichol, Robert C. [Institute of Cosmology and Gravitation, University of Portsmouth, Dennis Sciama Building, Portsmouth, PO1 3FX (United Kingdom); Pogosian, Levon [Department of Physics, Simon Fraser University, Burnaby, BC, V5A 1S6 (Canada)

2011-10-15T23:59:59.000Z

259

Experimental Investigation of Weak Non-Mesonic Decay of 10Be(Lambda)Hypernuclei at CEBAF  

E-Print Network (OSTI)

Hypernuclei are convenient laboratory to study the baryon-baryon weak interaction and associated effective Hamiltonian. The strangeness changing process, in which a Lambda hyperon converts to a neutron with a release up to 176 MeV, provides a clear signal for a conversion of an s-quark to a d-quark. We propose to perform a non-mesonic weak decay study of 10Be(Lambda)hypernuclei using the (e,eK) reaction. These investigations will fully utilize the unique parameters of the CEBAF CW electron beam and RF system and are enabled by (1) the use of new detector for alpha particles based on the recently developed RF timing technique with picosecond resolution and (2) the small angle and large acceptance kaon spectrometer-HKS in Hall C.

S. Majewski; L. Majling; A. Margaryan; L. Tang

2005-08-05T23:59:59.000Z

260

A Computational Complexity-Theoretic Elaboration of Weak Truth-Table Reducibility  

E-Print Network (OSTI)

The notion of weak truth-table reducibility plays an important role in recursion theory. In this paper, we introduce an elaboration of this notion, where a computable bound on the use function is explicitly specified. This elaboration enables us to deal with the notion of asymptotic behavior in a manner like in computational complexity theory, while staying in computability theory. We apply the elaboration to sets which appear in the statistical mechanical interpretation of algorithmic information theory. We demonstrate the power of the elaboration by revealing a critical phenomenon, i.e., a phase transition, in the statistical mechanical interpretation, which cannot be captured by the original notion of weak truth-table reducibility.

Tadaki, Kohtaro

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.


261

The weak heat kernel asymptotic expansion and the quantum double suspension  

E-Print Network (OSTI)

In this paper we are concerned with the construction of a general principle that will allow us to produce regular spectral triples with finite and simple dimension spectrum. We introduce the notion of weak heat kernel asymptotic expansion (WHKAE) property of a spectral triple and show that the weak heat kernel asymptotic expansion allows one to conclude that the spectral triple is regular with finite simple dimension spectrum. The usual heat kernel expansion implies this property. Finally we show that WHKAE is stable under quantum double suspension, a notion introduced by Hong and Szymanski. Therefore quantum double suspending compact Riemannian spin manifolds iteratively we get many examples of regular spectral triples with finite simple dimension spectrum. This covers all the odd dimensional quantum spheres. Our methods also apply to the case of noncommutative torus.

Chakraborty, Partha Sarathi

2010-01-01T23:59:59.000Z

262

Test of weak and strong factorization in nucleus-nucleuscollisions atseveral hundred MeV/nucleon  

DOE Green Energy (OSTI)

Total and partial charge-changing cross sections have been measured for argon projectiles at 400 MeV/nucleon in carbon, aluminum, copper, tin and lead targets; cross sections for hydrogen were also obtained, using a polyethylene target. The validity of weak and strong factorization properties has been investigated for partial charge-changing cross sections; preliminary cross section values obtained for carbon, neon and silicon at 290 and 400 MeV/nucleon and iron at 400 MeV/nucleon, in carbon, aluminum, copper, tin and lead targets have been also used for testing these properties. Two different analysis methods were applied and both indicated that these properties are valid, without any significant difference between weak and strong factorization. The factorization parameters have then been calculated and analyzed in order to find some systematic behavior useful for modeling purposes.

La Tessa, Chiara; Sihver, Lembit; Zeitlin, Cary; Miller, Jack; Guetersloh, Stephen; Heilbronn, Lawrence; Mancusi, Davide; Iwata,Yoshiuki; Murakami, Takeshi

2006-06-21T23:59:59.000Z

263

Constraining the Leading Weak Axial Two-body Current by SNO and Super-K  

E-Print Network (OSTI)

We analyze the Sudbury Neutrino Observatory (SNO) and Super-Kamiokande (SK) data on charged current (CC), neutral current (NC) and neutrino electron elastic scattering (ES) reactions to constrain the leading weak axial two-body current parameterized by L_1A. This two-body current is the dominant uncertainty of every low energy weak interaction deuteron breakup process, including SNO's CC and NC reactions. Our method shows that the theoretical inputs to SNO's determination of the CC and NC fluxes can be self-calibrated, be calibrated by SK, or be calibrated by reactor data. The only assumption made is that the total flux of active neutrinos has the standard ^8B spectral shape (but distortions in the electron neutrino spectrum are allowed). We show that SNO's conclusion about the inconsistency of the no-flavor-conversion hypothesis does not contain significant theoretical uncertainty, and we determine the magnitude of the active solar neutrino flux.

Jiunn-Wei Chen; Karsten M. Heeger; R. G. Hamish Robertson

2002-10-24T23:59:59.000Z

264

Next-to-leading order QCD corrections to photon production via weak-boson fusion  

E-Print Network (OSTI)

We present a calculation of next-to-leading order QCD corrections to gamma jj production via weak-boson fusion at a hadron collider in the form of a flexible parton-level Monte Carlo program which allows us to study cross sections and distributions within experimentally relevant selection cuts. The radiative corrections are found to be moderate with residual scale uncertainties being considerably improved beyond tree level. The sensitivity of the reaction to anomalous W+ W- gamma couplings is investigated.

B. Jager

2010-04-06T23:59:59.000Z

265

The use of LEDS (light-emitting diode) to simulate weak YAG-laser beams  

SciTech Connect

The purpose of this report is to determine whether and under what conditions a light-emitting diode may be used to simulate a weak YAG-laser beam that has been scattered by a distant reflecting object. By examining the differences between laser radiation and LED radiation, the author concludes that there is no theoretical reason that a LED may not be used in place of the laser beam.

Young, M.

1981-01-01T23:59:59.000Z

266

A Survey of Analogs to Weak MgII Absorbers in the Present  

E-Print Network (OSTI)

We present the results of a survey of the analogs of weak MgII absorbers (rest frame equivalent width W(2796) 0.02 A, with 30% completeness for the weakest lines. We find the number of weak MgII absorber analogs with 0.02 < W(2796) < 0.3 to be dN/dz = 1.00 +/- 0.20 for 0 < z < 0.3. This value is consistent with cosmological evolution of the population. We consider the expected effect on observability of weak MgII absorbers of the decreasing intensity of the extragalactic background radiation eld from z~1 to z~0. Assuming that all the objects that produce absorption at z~1 are stable on a cosmological timescale, and that no new objects are created, we would expect dN/dz of 2-3 at z~0. About 30-50% of this z~0 population would be decendants of the parsec-scale structures that produce single-cloud, weak MgII absorbers at z~1. The other 50-70% would be lower density, kiloparsec-scale structures that produce CIV absorption, but not detectable low ionization absorption, at z~1. We conclude that at least one, and perhaps some fraction of both, of these populations has evolved away since z~1, in order to match the z~0 dN/dz measured in our survey. This would follow naturally for a population of transient structures whose generation is related to star-forming processes, whose rate has decreased since z~1.

Anand Narayanan; Jane C. Charlton; Joe R. Masiero; Ryan Lynch

2005-09-16T23:59:59.000Z

267

Interaction of impurity ions with a weakly non-Maxwellian simple hydrogenic plasma  

DOE Green Energy (OSTI)

The average acceleration of an ensemble of ''test particles'' in a plasma is called the ''dynamical friction''; the average rate at which their velocity vectors spread out in velocity space is expressed in a velocity-space diffusion-rate tensor. These quantities are derived for impurity ions interacting with a weakly non-Maxwellian simple hydrogenic plasma. The distribution functions for the plasma ions and electrons are written explicitly. 5 refs., 3 figs.

Terry, W.K.

1988-08-01T23:59:59.000Z

268

Effect of Correlated Noise on Source Shape Parameters and Weak Lensing Measurements  

E-Print Network (OSTI)

The measurement of shape parameters of sources in astronomical images is usually performed by assuming that the underlying noise is uncorrelated. Spatial noise correlation is however present in practice due to various observational effects and can affect source shape parameters. This effect is particularly important for measurements of weak gravitational lensing, for which the sought image distortions are typically of the order of only 1%. We compute the effect of correlated noise on two-dimensional gaussian fits in full generality. The noise properties are naturally quantified by the noise autocorrelation function (ACF), which is easily measured in practice. We compute the resulting bias on the mean, variance and covariance of the source parameters, and the induced correlation between the shapes of neighboring sources. We show that these biases are of second order in the inverse signal-to-noise ratio of the source, and could thus be overlooked if bright stars are used to monitor systematic distortions. Radio interferometric surveys are particularly prone to this effect because of the long-range pixel correlations produced by the Fourier inversion involved in their image construction. As a concrete application, we consider the search for weak lensing by large-scale structure with the FIRST radio survey. We measure the noise ACF for a FIRST coadded field, and compute the resulting ellipticity correlation function induced by the noise. In comparison with the weak-lensing signal expected in CDM models, the noise correlation effect is important on small angular scales, but is negligible for source separations greater than about 1 arcmin. We also discuss how noise correlation can affect weak-lensing studies with optical surveys.

A. Refregier; S. T. Brown

1998-03-24T23:59:59.000Z

269

Entangled state generation with an intrinsically pure single-photon source and a weak coherent source  

E-Print Network (OSTI)

We report on the experimental generation of an entangled state with a spectrally pure heralded single-photon state and a weak coherent state. By choosing group-velocity matching in the nonlinear crystal, our system for producing entangled photons was 60 times brighter than that in the earlier experiment [Phys. Rev. Lett. 90, 240401 (2003)], with no need of bandpass filters. This entanglement system is useful for quantum information protocols that require indistinguishable photons from independent sources.

Rui-Bo Jin; Ryosuke Shimizu; Fumihiro Kaneda; Yasuyoshi Mitsumori; Hideo Kosaka; Keiichi Edamatsu

2013-03-12T23:59:59.000Z

270

Fluctuations in the Gravitational, Strong and Weak Nuclear Fields through an Effective Harmonic Oscillator Model  

E-Print Network (OSTI)

We propose an effective harmonic oscillator model in order to treat the fluctuations of the gravitational, strong and weak nuclear fields. With respect to the gravitational field, first we use the model to estimate its fluctuating strength, necessary to decohere the wavefunction of a cubic centimeter of air at the standard temperature and pressure conditions. Second, the fluctuation of a point mass through a distance equal to the Planck length leads to the self-gravitational interaction of a particle, which can be related to its de Broglie frequency. Third, by making the equality of the fluctuating field strength with the gravitational field of a mass M at half of its Schwarzschild radius, we obtain an estimate of the mass of the Universe. We also consider the fluctuations of the strong nuclear field, as a means to estimate the separation in energy between the ground state and the centroid of the excitated states of the nucleon. Finally, taking into account the neutron-proton mass difference, we use the fluctuations of the weak nuclear field in order to evaluate the weak coupling constant.

P. R. Silva

2001-12-10T23:59:59.000Z

271

Subaru weak-lensing study of A2163: bimodal mass structure  

E-Print Network (OSTI)

We present a weak-lensing analysis of the merging cluster A2163 using Subaru/Suprime-Cam and CHFT/Mega-Cam data and discuss the dynamics of this cluster merger, based on complementary weak-lensing, X-ray, and optical spectroscopic datasets. From two dimensional multi-component weak-lensing analysis, we reveal that the cluster mass distribution is well described by three main components: a two component main cluster A2163-A with mass ratio 1:8, and its cluster satellite A2163-B. The bimodal mass distribution in A2163-A is similar to the galaxy density distribution, but appears as spatially segregated from the brightest X-ray emitting gas region. We discuss the possible origins of this gas-dark matter offset, and suggest the gas core of the A2163-A subcluster to have been stripped away by ram pressure from its dark matter component. The survival of this gas core to the tidal forces exerted by the main cluster let us infer a subcluster accretion with non-zero impact parameter. Dominated by the most massive compo...

Okabe, Nobuhiro; Mazzotta, Pasquale; Maurogordato, Sophie

2011-01-01T23:59:59.000Z

272

The Soft-X-Ray Spectral Shape of X-Ray-Weak Seyferts  

E-Print Network (OSTI)

(I) We observed eight Seyfert~2s and two X--ray--weak Seyfert~1/QSOs with the ROSAT PSPC, and one Seyfert~2 with the ROSAT HRI. These targets were selected from the Extended 12\\um\\ Galaxy Sample. (II) Both Seyfert~1/QSOs vary by factors of 1.5---2. The photon indices steepen in the more luminous state, consistent with the variability being mainly due to the softest X--rays, which are confined to a size of less than a parsec. (III) Both the Seyfert~2s and Seyfert~1/QSOs are best fit with a photon index of $\\Gamma\\sim3$, which is steeper than the canonical value of $\\Gamma\\sim1.7$ measured for X--ray--strong Seyferts by ROSAT and at higher energies. Several physical explanations are suggested for the steeper slopes of X--ray--weak objects. (IV) We observed one Seyfert~2, NGC~5005, with the ROSAT HRI, finding about 13\\% of the soft X--rays to come from an extended component. This and other observations suggest that different components to the soft X--ray spectrum of some, if not all, X--ray--weak Seyferts may come from spatially distinct regions.

Brian Rush; Matthew A. Malkan

1995-07-27T23:59:59.000Z

273

PROBING PRIMORDIAL NON-GAUSSIANITY WITH WEAK-LENSING MINKOWSKI FUNCTIONALS  

SciTech Connect

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

274

The Strength of Weak Cooperation: an Attempt to Understand the Meaning of Web 2.0  

E-Print Network (OSTI)

Abstract: This paper examines some continuities and ruptures in the use of Web 2.0 such as blogs, social media, user-generated content services etc. vis-à-vis earlier web services. We hypothesize that one of the sociological characteristics of Web 2.0 services is that making personal production public creates a new articulation between individualism and solidarity, which reveals the strength of weak cooperation. Web 2.0 services allow individual contributors to experience cooperation ex post. The strength of the weak cooperation arises from the fact that it is not necessary for individuals to have an ex ante cooperative action plan or altruistic intention. They discover cooperative opportunities only by making public their individual production. The paper illustrates this phenomenon by analysing the uses of different services and by looking at the new process of innovation that appears through Barcamp and Coworking spaces. Key words: Web 2.0, weak cooperation, BarCamp. E choing the euphoric 2000 internet bubble, the Web 2.0 label is now so widespread that it is increasingly difficult to define the boundaries and

Christophe Aguiton; Dominique Cardon; France Télécom R

2007-01-01T23:59:59.000Z

275

Thermodynamics of MgB2 described by the weak-coupling two-band BCS model  

E-Print Network (OSTI)

Based on weak-coupling anisotropic BCS theory, the temperature dependence of energy gap and the specific heat are evaluated for the MgB2 superconductor, and the results are compared with experimental data. We show that the weak-coupling anisotropic BCS theory describes thermodynamic experimental data with high precision, 3-6%.

Mishonov, TM; Pokrovsky, Valery L.; Wei, HD.

2005-01-01T23:59:59.000Z

276

MHD simula+ons of the solar atmosphere: effects of weak ioniza+on and radia+on  

E-Print Network (OSTI)

true for space weather, though... #12;Outline · Plasma parameters of the solar atmosphere · EffectMHD simula+ons of the solar atmosphere: effects of weak ioniza+on and radia+on Hiroaki Isobe of weak ioniza+on in magne+c reconnec+on is solar chromosphere · Radia+on MHD simula+on of solar

Ito, Atsushi

277

Preheating ablation effects on the Rayleigh-Taylor instability in the weakly nonlinear regime  

SciTech Connect

The two-dimensional Rayleigh-Taylor instability (RTI) with and without thermal conduction is investigated by numerical simulation in the weakly nonlinear regime. A preheat model {kappa}(T)={kappa}{sub SH}[1+f(T)] is introduced for the thermal conduction [W. H. Ye, W. Y. Zhang, and X. T. He, Phys. Rev. E 65, 057401 (2002)], where {kappa}{sub SH} is the Spitzer-Haerm electron thermal conductivity coefficient and f(T) models the preheating tongue effect in the cold plasma ahead of the ablation front. The preheating ablation effects on the RTI are studied by comparing the RTI with and without thermal conduction with identical density profile relevant to inertial confinement fusion experiments. It is found that the ablation effects strongly influence the mode coupling process, especially with short perturbation wavelength. Overall, the ablation effects stabilize the RTI. First, the linear growth rate is reduced, especially for short perturbation wavelengths and a cutoff wavelength is observed in simulations. Second, the second harmonic generation is reduced for short perturbation wavelengths. Third, the third-order negative feedback to the fundamental mode is strengthened, which plays a stabilization role. Finally, on the contrary, the ablation effects increase the generation of the third harmonic when the perturbation wavelengths are long. Our simulation results indicate that, in the weakly nonlinear regime, the ablation effects are weakened as the perturbation wavelength is increased. Numerical results obtained are in general agreement with the recent weakly nonlinear theories as proposed in [J. Sanz, J. Ramirez, R. Ramis et al., Phys. Rev. Lett. 89, 195002 (2002); J. Garnier, P.-A. Raviart, C. Cherfils-Clerouin et al., Phys. Rev. Lett. 90, 185003 (2003)].

Wang, L. F. [SMCE, China University of Mining and Technology, Beijing 100083 (China); CAPT, Peking University, Beijing 100871 (China) and LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Mathematics, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Ye, W. H.; He, X. T. [CAPT, Peking University, Beijing 100871 (China) and LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Physics, Zhejiang University, Hangzhou 310027 (China); Sheng, Z. M. [Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190 (China) and Department of Physics, Shanghai Jiao Tong University, Shanghai 200240 (China); Don, Wai-Sun [Department of Mathematics, Hong Kong Baptist University, Kowloon Tong (Hong Kong); Li, Y. J. [SMCE, China University of Mining and Technology, Beijing 100083 (China)

2010-12-15T23:59:59.000Z

278

A Precision Measurement of the Weak Mixing Angle in Moller Scattering at Low Q^2  

DOE Green Energy (OSTI)

The electroweak theory has been probed to a high level of precision at the mass scale of the Z{sup 0} through the joint contributions of LEP at CERN and the SLC at SLAC. The E158 experiment at SLAC complements these results by measuring the weak mixing angle at a Q{sup 2} of 0.026 (GeV/c){sup 2}, far below the weak scale. The experiment utilizes a 48 GeV longitudinally polarized electron beam on unpolarized atomic electrons in a target of liquid hydrogen to measure the parity-violating asymmetry A{sup PV} in Moeller scattering. The tree-level prediction for A{sup PV} is proportional to 1-4 sin{sup 2} {theta}{sub W}. Since sin{sup 2} {theta}{sub W} {approx} 0.25, the effect of radiative corrections is enhanced, allowing the E158 experiment to probe for physics effects beyond the Standard Model at the TeV scale. This work presents the results from the first two physics runs of the experiment, covering data collected in the year 2002. The parity-violating asymmetry A{sup PV} was measured to be A{sup PV} = -158 ppb {+-} 21 ppb (stat) {+-} 17 ppb (sys). The result represents the first demonstration of parity violation in Moeller scattering. The observed value of A{sup PV} corresponds to a measurement of the weak mixing angle of sin{sup 2} {theta}{sub W}{sup eff} = 0.2380 {+-} 0.0016(stat) {+-} 0.0013(sys), which is in good agreement with the theoretical prediction of sin{sup 2} {theta}{sub W}{sup eff} = 0.2385 {+-} 0.0006 (theory).

Jones, G.

2005-01-28T23:59:59.000Z

279

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

Science Conference Proceedings (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

280

Experimental verification of Boltzmann equilibrium for negative ions in weakly collisional electronegative plasmas  

Science Conference Proceedings (OSTI)

Weakly collisional Ar-O{sub 2} electronegative plasmas are investigated in a dc multidipole chamber. An electronegative core and an electropositive halo are observed. The density ratio of negative ions to electrons ({alpha}) in the nondrifting bulk is found to be 0.43. The profile of {alpha} is found using both the phase velocity of ion acoustic waves and the drift velocity of positive ions determined by laser-induced fluorescence. The experiment shows that negative ions are in Boltzmann equilibrium with a temperature of 0.06{+-}0.02 eV. Double layers are not found separating the electronegative core and the electropositive halo.

Ghim, Young-chul [Department of Physics, University of Oxford, Oxford OX1 3NP (United Kingdom); Hershkowitz, Noah [Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2009-04-13T23:59:59.000Z

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
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281

Rate of decoherence for an electron weakly coupled to a phonon gas  

E-Print Network (OSTI)

We study the dynamics of an electron weakly coupled to a phonon gas. The initial state of the electron is the superposition of two spatially localized distant bumps moving towards each other, and the phonons are in a thermal state. We investigate the dynamics of the system in the kinetic regime and show that the time evolution makes the non-diagonal terms of the density matrix of the electron decay, destroying the interference between the two bumps. We show that such a damping effect is exponential in time, and the related decay rate is proportional to the total scattering cross section of the electron-phonon interaction.

Riccardo Adami; Laszlo Erdos

2008-02-08T23:59:59.000Z

282

Direct observation of dynamics of single spinning dust grains in weakly magnetized complex plasma  

SciTech Connect

The rotational dynamics of single dust grains in a weak magnetic field is investigated on a kinetic level. Experiments reveal spin-up of spherical dust grains and alignment of their magnetic moments parallel to the magnetic induction vector. The angular velocity of spinning prolate grains varies as magnetic induction increases to 250 G. Spinning dust grains are found to flip over only when the magnetic field magnitude is changing. The results demonstrate that dusty plasma has paramagnetic properties. Qualitative interpretations are proposed to explain newly discovered phenomena.

Dzlieva, E. S.; Karasev, V. Yu., E-mail: plasmadust@yandex.ru [St. Petersburg State University, Institute of Physics (Russian Federation); Petrov, O. F. [Russian Academy of Sciences, Institute for High Energy Densities, Joint Institute for High Temperatures (Russian Federation)

2012-01-15T23:59:59.000Z

283

Liquid-gas Phase Transition in Strange Hadronic Matter with Weak Y-Y Interaction  

E-Print Network (OSTI)

The liquid-gas phase transition in strange hadronic matter is reexamined by using the new parameters about the $\\Lambda - \\Lambda$ interaction deduced from recent observation of $^{6}_{\\Lambda\\Lambda}He$ double hypernucleus. The extended Furnstahl-Serot-Tang model with nucleons and hyperons is utilized. The binodal surface, the limit pressure, the entropy, the specific heat capacity and the Caloric curves are addressed. We find that the liquid-gas phase transition can occur more easily in strange hadronic matter with weak Y-Y interaction than that of the strong Y-Y interaction.

Li Yang; Shao Yu Yin; Wei Liang Qian; Ru-keng Su

2005-06-19T23:59:59.000Z

284

Extensive escape rate in lattices of weakly coupled expanding maps with holes  

E-Print Network (OSTI)

This paper discusses possible approaches to the escape rate in infinite lattices of weakly coupled maps with uniformly expanding repeller. It is proved that computed-via-volume rates of spatially periodic approximations grow linearly with the period size, suggesting normalized escape rate as the appropriate notion for the infinite system. The proof relies on symbolic dynamics and is based on the control of cumulative effects of perturbations within cylinder sets. A piecewise affine diffusive example is presented that exhibits monotonic decay of the escape rate with coupling intensity.

Jean-Baptiste Bardet; Bastien Fernandez

2010-06-29T23:59:59.000Z

285

Extensive escape rate in lattices of weakly coupled expanding maps with holes  

E-Print Network (OSTI)

This paper discusses possible approaches to the escape rate in infinite lattices of weakly coupled maps with uniformly expanding repeller. It is proved that computed-via-volume rates of spatially periodic approximations grow linearly with the period size, suggesting normalized escape rate as the appropriate notion for the infinite system. The proof relies on symbolic dynamics and is based on the control of cumulative effects of perturbations within cylinder sets. A piecewise affine diffusive example is presented that exhibits monotonic decay of the escape rate with coupling intensity.

Bardet, Jean-Baptiste

2010-01-01T23:59:59.000Z

286

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma  

E-Print Network (OSTI)

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

Jiunn-Wei Chen; Yen-Fu Liu; Shi Pu; Yu-Kun Song; Qun Wang

2013-08-13T23:59:59.000Z

287

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma  

E-Print Network (OSTI)

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

Chen, Jiunn-Wei; Pu, Shi; Song, Yu-Kun; Wang, Qun

2013-01-01T23:59:59.000Z

288

An Einstein-like theory of gravity with a non-newtonian weak-field limit  

E-Print Network (OSTI)

We propose a model describing Einstein gravity coupled to a scalar field with an exponential potential. We show that the weak-field limit of the model has static solutions given by a gravitational potential behaving for large distances as \\ln r . The Newtonian term GM/r appears only as subleading. Our model can be used to give a phenomenological explanation of the rotation curves of the galaxies without postulating the presence of dark matter. This can be achieved only by giving up at galactic scales Einstein equivalence principle.

Mariano Cadoni

2003-12-09T23:59:59.000Z

289

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

SciTech Connect

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); Nayak, O.B. [HVDC Research Centre, Winnipeg, Manitoba (Canada); Turanli, H.M. [Manitoba Hydro, Winnipeg, Manitoba (Canada)

1996-04-01T23:59:59.000Z

290

Perturbative analysis of sheared flow Kelvin-Helmholtz instability in a weakly relativistic magnetized electron fluid  

Science Conference Proceedings (OSTI)

In the interaction of intense lasers with matter/plasma, energetic electrons having relativistic energies get created. These energetic electrons can often have sheared flow profiles as they propagate through the plasma medium. In an earlier study [Phys. Plasmas 17, 022101 (2010)], it was shown that a relativistic sheared electron flow modifies the growth rate and threshold condition of the conventional Kelvin-Helmholtz instability. A perturbative analytic treatment for the case of weakly relativistic regime has been provided here. It provides good agreement with the numerical results obtained earlier.

Sundar, Sita; Das, Amita; Kaw, Predhiman [Institute for Plasma Research, Bhat, Gandhinagar-382428 (India)

2012-05-15T23:59:59.000Z

291

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

292

Testing the Standard Model by precision measurement of the weak charges of quarks  

SciTech Connect

In a global analysis of the latest parity-violating electron scattering measurements on nuclear targets, we demonstrate a significant improvement in the experimental knowledge of the weak neutral-current lepton-quark interactions at low-energy. The precision of this new result, combined with earlier atomic parity-violation measurements, limits the magnitude of possible contributions from physics beyond the Standard Model - setting a model-independent, lower-bound on the scale of new physics at ~1 TeV.

Ross Young; Roger Carlini; Anthony Thomas; Julie Roche

2007-05-01T23:59:59.000Z

293

Superflow in a Toroidal Bose-Einstein Condensate: An Atom Circuit with a Tunable Weak Link  

SciTech Connect

We have created a long-lived ({approx_equal}40 s) persistent current in a toroidal Bose-Einstein condensate held in an all-optical trap. A repulsive optical barrier across one side of the torus creates a tunable weak link in the condensate circuit, which can affect the current around the loop. Superflow stops abruptly at a barrier strength such that the local flow velocity at the barrier exceeds a critical velocity. The measured critical velocity is consistent with dissipation due to the creation of vortex-antivortex pairs. This system is the first realization of an elementary closed-loop atom circuit.

Ramanathan, A.; Wright, K. C.; Muniz, S. R.; Zelan, M.; Hill, W. T. III; Lobb, C. J.; Helmerson, K.; Phillips, W. D.; Campbell, G. K. [Joint Quantum Institute, National Institute of Standards and Technology and University of Maryland, Gaithersburg, Maryland, 20899 (United States)

2011-04-01T23:59:59.000Z

294

Determination of the Axial-Vector Weak Coupling Constant with Polarized Ultracold Neutrons  

E-Print Network (OSTI)

A precise measurement of the neutron decay $\\beta$-asymmetry $A_0$ has been carried out using polarized ultracold neutrons (UCN) from the pulsed spallation UCN source at the Los Alamos Neutron Science Center (LANSCE). Combining data obtained in 2008 and 2009, we report $A_0 = -0.11966 \\pm 0.00089 _{-0.00140}^{+0.00123}$, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon $g_A/g_V = -1.27590 _{-0.00445}^{+0.00409}$.

Liu, J; Holley, A T; Back, H O; Bowles, T J; Broussard, L J; Carr, R; Clayton, S; Currie, S; Filippone, B W; Garcia, A; Geltenbort, P; Hickerson, K P; Hoagland, J; Hogan, G E; Hona, B; Ito, T M; Liu, C -Y; Makela, M; Mammei, R R; Martin, J W; Melconian, D; Morris, C L; Pattie, R W; Galvan, A Perez; Pitt, M L; Plaster, B; Ramsey, J C; Rios, R; Russell, R; Saunders, A; Seestrom, S; Sondheim, W E; Tatar, E; Vogelaar, R B; VornDick, B; Wrede, C; Yan, H; Young, A R

2010-01-01T23:59:59.000Z

295

Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons  

E-Print Network (OSTI)

A precise measurement of the neutron decay $\\beta$-asymmetry $A_0$ has been carried out using polarized ultracold neutrons (UCN) from the pulsed spallation UCN source at the Los Alamos Neutron Science Center (LANSCE). Combining data obtained in 2008 and 2009, we report $A_0 = -0.11966 \\pm 0.00089_{-0.00140}^{+0.00123}$, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon $g_A/g_V = -1.27590_{-0.00445}^{+0.00409}$.

UCNA Collaboration; J. Liu; M. P. Mendenhall; A. T. Holley; H. O. Back; T. J. Bowles; L. J. Broussard; R. Carr; S. Clayton; S. Currie; B. W. Filippone; A. Garcia; P. Geltenbort; K. P. Hickerson; J. Hoagland; G. E. Hogan; B. Hona; T. M. Ito; C. -Y. Liu; M. Makela; R. R. Mammei; J. W. Martin; D. Melconian; C. L. Morris; R. W. Pattie Jr.; A. Perez Galvan; M. L. Pitt; B. Plaster; J. C. Ramsey; R. Rios; R. Russell; A. Saunders; S. J. Seestrom; W. E. Sondheim; E. Tatar; R. B. Vogelaar; B. VornDick; C. Wrede; H. Yan; A. R. Young

2010-07-22T23:59:59.000Z

296

Determination of the Axial-Vector Weak Coupling Constant with Ultracold Neutrons  

Science Conference Proceedings (OSTI)

A precise measurement of the neutron decay {beta} asymmetry A{sub 0} has been carried out using polarized ultracold neutrons from the pulsed spallation ultracold neutron source at the Los Alamos Neutron Science Center. Combining data obtained in 2008 and 2009, we report A{sub 0}=-0.119 66{+-}0.000 89{sub -0.00140}{sup +0.00123}, from which we determine the ratio of the axial-vector to vector weak coupling of the nucleon g{sub A}/g{sub V}=-1.275 90{sub -0.00445}{sup +0.00409}.

Liu, J. [Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 (United States); Department of Physics, Shanghai Jiao Tong University, Shanghai, 200240 (China); Mendenhall, M. P.; Carr, R.; Filippone, B. W.; Hickerson, K. P.; Perez Galvan, A.; Russell, R. [Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125 (United States); Holley, A. T.; Hoagland, J.; VornDick, B. [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States); Back, H. O.; Pattie, R. W. Jr.; Young, A. R. [Department of Physics, North Carolina State University, Raleigh, North Carolina 27695 (United States); Triangle Universities Nuclear Laboratory, Durham, North Carolina 27708 (United States); Bowles, T. J.; Clayton, S.; Currie, S.; Hogan, G. E.; Ito, T. M.; Makela, M.; Morris, C. L. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2010-10-29T23:59:59.000Z

297

Distillation of free entanglement from bound entangled states using weak measurements  

E-Print Network (OSTI)

We propose a scheme for distillation of free bipartite entanglement from bipartite bound-entangled states. The crucial element of our scheme is an ancillary system that is coupled to the initial bound-entangled state via appropriate weak measurements. We show that in this protocol free entanglement can be always generated with nonzero probability by using a single copy of the bound-entangled state. We also derive a lower bound on the entanglement cost of the protocol, and conclude that, on average, applying weaker measurements results in relatively higher values of free entanglement as well as lower costs.

S. Baghbanzadeh; A. T. Rezakhani

2013-09-11T23:59:59.000Z

298

Detection and Control of Individual Nuclear Spins Using a Weakly Coupled Electron Spin  

Science Conference Proceedings (OSTI)

We experimentally isolate, characterize, and coherently control up to six individual nuclear spins that are weakly coupled to an electron spin in diamond. Our method employs multipulse sequences on the electron spin that resonantly amplify the interaction with a selected nuclear spin and at the same time dynamically suppress decoherence caused by the rest of the spin bath. We are able to address nuclear spins with interaction strengths that are an order of magnitude smaller than the electron spin dephasing rate. Our results provide a route towards tomography with single-nuclear-spin sensitivity and greatly extend the number of available quantum bits for quantum information processing in diamond.

Taminiau, T.H.; Wagenaar, J.J.T.; van der Sar, T.; Jelezko, F.; Dobrovitski, Viatcheslav V.; Hanson, R.

2012-09-28T23:59:59.000Z

299

Ground state cooling of a nanomechanical resonator in the weak-confinement regime via quantum interference  

E-Print Network (OSTI)

Ground state cooling of a nanomechanical resonator coupled to a superconducting flux qubit is discussed. We show that by inducing quantum interference to cancel detrimental carrier excitations, ground state cooling becomes possible in the weak-confinement or non-resolved regime. The qubit is modelled as a three-level system in lambda configuration, and the driving fluxes are applied such that the qubit absorption spectrum exhibits electromagnetically induced transparency, thereby cancelling the unwanted carrier excitation. As our interference-based scheme allows to apply strong cooling fields, fast and efficient cooling can be achieved.

Xia, K

2009-01-01T23:59:59.000Z

300

Ground state cooling of a nanomechanical resonator in the weak-confinement regime via quantum interference  

E-Print Network (OSTI)

Ground state cooling of a nanomechanical resonator coupled to a superconducting flux qubit is discussed. We show that by inducing quantum interference to cancel detrimental carrier excitations, ground state cooling becomes possible in the weak-confinement or non-resolved regime. The qubit is modelled as a three-level system in lambda configuration, and the driving fluxes are applied such that the qubit absorption spectrum exhibits electromagnetically induced transparency, thereby cancelling the unwanted carrier excitation. As our interference-based scheme allows to apply strong cooling fields, fast and efficient cooling can be achieved.

K. Xia; J. Evers

2009-02-23T23:59:59.000Z

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.


301

Tau protein binds to microtubules through a flexible array of distributed weak sites. Z Cell Biol  

E-Print Network (OSTI)

Abstract. Tau protein plays a role in the extension and maintenance of neuronal processes through a direct association with microtubules. To characterize the nature of this association, we have synthesized a collection of tau protein fragments and studied their binding properties. The relatively weak affinity of tau protein for microtubules (ti10- ' M) is concentrated in a large region containing three or four 18 amino acid repeated binding elements. These are separated by apparently flexible but less conserved linker sequences of 13-14 amino acids that do not bind. Within the repeats, the binding energy for microtubules is delocalized and derives from a series of weak interactions contributed by small groups of amino acids. These unusual char acteristics suggest tau protein can assume multiple conformations and can pivot and perhaps migrate on the surface of the microtubule. The flexible structure of the tau protein binding interaction may allow it to be easily displaced from the microtubule lattice and may have important consequences for its function. TAU protein is a microtubule-associated protein present In brain and other neuronal tissues (Binder et al., 1985; Drubin et al., 1986; Weingarten et al., 1975). It is found in the axonal microtubules of mature neurons (Binder et al., 1985) and in the axonlike elongated neurite processes synthesized by differentiating neurons in culture

Karena Butner; Marc W. Kirschner

1991-01-01T23:59:59.000Z

302

Deformed Coordinate-Space Hartree-Fock-Bogoliubov Approach to Weakly Bound Nuclei and Large Deformations  

Science Conference Proceedings (OSTI)

The coordinate space formulation of the Hartree-Fock-Bogoliubov (HFB) method enables self-consistent treatment of mean field and pairing in weakly bound systems whose properties are affected by the particle continuum space. Of particular interest are neutron-rich, deformed drip-line nuclei which can exhibit novel properties associated with neutron skin. To describe such systems theoretically, we developed an accurate 2D lattice Skyrme-HFB solver HFB-AX based on B-splines. Compared to previous implementations, we made a number of improvements aimed at boosting the solver's performance. These include: explicit imposition of axiality and space inversion, use of the modified Broyden's method to solve self-consistent equations, and a partial parallelization of the code. HFB-AX has been benchmarked against other HFB solvers, both spherical and deformed, and the accuracy of the B-spline expansion was tested by employing the multi-resolution wavelet method. Illustrative calculations are carried out for stable and weakly bound nuclei at spherical and very deformed shapes, including constrained fission pathways. In addition to providing new physics insights, HFB-AX can serve as a useful tool to assess the reliability and applicability of coordinate-space and configuration-space HFB solvers, both existing and in development.

Pei, Junchen [ORNL; Stoitsov, M. V. [University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL); Fann, G. I. [Oak Ridge National Laboratory (ORNL); Nazarewicz, W. [University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL); Schunck, N. [University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL); Xu, F. R. [Peking University

2008-01-01T23:59:59.000Z

303

Deformed Coordinate-Space Hartree-Fock-Bogoliubov Approach to Weakly Bound Nuclei and Large Deformations  

E-Print Network (OSTI)

The coordinate space formulation of the Hartree-Fock-Bogoliubov (HFB) method enables self-consistent treatment of mean-field and pairing in weakly bound systems whose properties are affected by the particle continuum space. Of particular interest are neutron-rich, deformed drip-line nuclei which can exhibit novel properties associated with neutron skin. To describe such systems theoretically, we developed an accurate 2D lattice Skyrme-HFB solver {\\hfbax} based on B-splines. Compared to previous implementations, we made a number of improvements aimed at boosting the solver's performance. These include: explicit imposition of axiality and space inversion, use of the modified Broyden's method to solve self-consistent equations, and a partial parallelization of the code. {\\hfbax} has been benchmarked against other HFB solvers, both spherical and deformed, and the accuracy of the B-spline expansion was tested by employing the multiresolution wavelet method. Illustrative calculations are carried out for stable and weakly bound nuclei at spherical and very deformed shapes, including constrained fission pathways. In addition to providing new physics insights, {\\hfbax} can serve as a useful tool to assess the reliability and applicability of coordinate-space and configuration-space HFB solvers, both existing and in development.

J. C. Pei; M. V. Stoitsov; G. I. Fann; W. Nazarewicz; N. Schunck; F. R. Xu

2008-07-18T23:59:59.000Z

304

Quantum interference terms in nonmesonic weak decay of $?$-hypernuclei within a RPA formalism  

E-Print Network (OSTI)

Single and double coincidence nucleon spectra in the $\\Lambda$-hypernuclei weak decay are evaluated and discussed using a microscopic formalism. Nuclear matter is employed together with the local density approximation which allows us to analyze the $^{12}_{\\Lambda}C$ hypernucleus non-mesonic weak decay. Final state interactions (FSI) are included via the first order (in the nuclear residual interaction) terms to the RPA, where the strong residual interaction is modelled by a Bonn potential. At this level of approximation, these FSI are pure quantum interference terms between the primary decay $(\\Lambda N \\to NN)$ and $(\\Lambda N \\to NN \\to NN)$, where the strong interaction is responsible for the last piece in the second reaction. Also the Pauli exchange contributions are explicitly evaluated. We show that the inclusion of Pauli exchange terms is important. A comparison with data is made. We conclude that the limitations in phase space in the RPA makes this approximation inadequate to reproduce the nucleon spectra. This fact, does not allow us to draw a definite conclusion about the importance of the interference terms.

E. Bauer

2007-07-30T23:59:59.000Z

305

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

2012-12-06T23:59:59.000Z

306

Space Inversion of Spinors Revisited: A Possible Explanation of Chiral Behavior in Weak Interactions  

E-Print Network (OSTI)

We investigate a model in which spinors are considered as being embedded within the Clifford algebra that operates on them. In Minkowski space $M_{1,3}$, we have four independent 4-component spinors, each living in a different minimal left ideal of $Cl(1,3)$. We show that under space inversion, a spinor of one left ideal transforms into a spinor of another left ideal. This brings novel insight to the role of chirality in weak interactions. We demonstrate the latter role by considering an action for a generalized spinor field $\\psi^{\\alpha i}$ that has not only a spinor index $\\alpha$ but also an extra index $i$ running over four ideals. The covariant derivative of $\\psi^{\\alpha i}$ contains the generalized spin connection, the extra components of which are interpreted as the SU(2) gauge fields of weak interactions and their generalization. We thus arrive at a system that is left-right symmetric due to the presence of a "parallel sector", postulated a long time ago, that contains mirror particles coupled to mirror SU(2) gauge fields.

Matej Pavsic

2010-05-10T23:59:59.000Z

307

Diagnostic Pressure Equation as a Weak Constraint in a Storm-Scale Three-Dimensional Variational Radar Data Assimilation System  

Science Conference Proceedings (OSTI)

A diagnostic pressure equation is incorporated into a storm-scale three-dimensional variational data assimilation (3DVAR) system in the form of a weak constraint in addition to a mass continuity equation constraint (MCEC). The goal of this ...

Guoqing Ge; Jidong Gao; Ming Xue

2012-08-01T23:59:59.000Z

308

Baroclinically Unstable Geostrophic Turbulence in the Limits of Strong and Weak Bottom Ekman Friction: Application to Midocean Eddies  

Science Conference Proceedings (OSTI)

This paper examines the plausibility of mesoscale eddy generation through local baroclinic instability of weak midocean gyre flows. The main tool is a statistically steady, two-layer quasigeostrophic turbulence model driven by an imposed, ...

Brian K. Arbic; Glenn R. Flierl

2004-10-01T23:59:59.000Z

309

Comparative Diagnostic Case Study of East Coast Secondary Cyclogenesis under Weak Versus Strong Synoptic-Scale Forcing  

Science Conference Proceedings (OSTI)

Two cases of east coast cyclogenesis are compared. They occur under weak and strong synoptic scale forcing, respectively. A set of objective analyses with one degree latitude-longitude horizontal resolution and 100 mb vertical resolution is used ...

Vito Pagnotti; Lance F. Bosart

1984-01-01T23:59:59.000Z

310

Differences in Atmospheric Circulation between the Development of Weak and Strong Warm Events in the Southern Oscillation  

Science Conference Proceedings (OSTI)

In this study temporal and spatial aspects of El Niño (warm event) development are explored by comparing composite sequences of sea level pressure (SLP), surface wind, and sea surface temperature (SST) anomalies leading into strong and weak ...

David J. Stephens; Michael J. Meuleners; Harry van Loon; Malcolm H. Lamond; Nicola P. Telcik

2007-05-01T23:59:59.000Z

311

Study of precision weak-link stage systems with large travel range and sub-nanometer-scale resolution  

SciTech Connect

To use x-ray optics with nanometer resolution limit, scanning x-ray nanoprobes with corresponding mechanical positioning capability need to be designed. In particular, positioning stages with both sub-nanometer resolution and a positioning/scanning range of several millimeters are required. Based on our design of precision weak-link stages with interferometric encoders for the Center for Nanoscale Materials (CNM) hard x-ray nanoprobe at the Advanced Photon Source (APS) Sector 26, we have developed a new two-dimensional (2-D) weak-link stage system for nanopositioning of a specimen holder. This system provides sub-nanometer resolution, coupled with sub-nanometer metrology at a travel range of several millimeters. The 2-D weak-link stage system is designed with high structure stiffness using laminar overconstrained weak-link mechanisms [4-6]. In this paper we present the study of a linear precision weak-link stage system with sub-centimeter travel range and sub-nanometer positioning resolution. Design of a rotary weak-link stage system with 10-nrad resolution and 10-degree-level travel range is also discussed in this paper.

Shu Deming [Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States); Maser, Jorg [Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439 (United States); Advanced Photon Source, Argonne National Laboratory, Argonne, IL 60439 (United States)

2010-06-23T23:59:59.000Z

312

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

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

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

313

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

SciTech Connect

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

314

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

SciTech Connect

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

315

Remaining Sites Verification Package for the 1607-F7, 141-M Building Septic Tank, Waste Site Reclassification Form 2006-040  

SciTech Connect

The 1607-F7, 141-M Building Septic Tank waste site was a septic tank and drain field that received sanitary sewage from the former 141-M Building. Remedial action was performed in August and November 2005. The results of verification sampling demonstrate that residual contaminant concentrations 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

2006-10-19T23:59:59.000Z

316

Remaining Sites Verification Package for the 600-233 Waste Site, Vertical Pipe Near 100-B Electrical Laydown Area, Waste Site Reclassification Form 2005-041  

SciTech Connect

The 600-233 waste site consisted of three small-diameter pipelines within the 600-232 waste site, including previously unknown diesel fuel supply lines discovered during site remediation. The 600-233 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.

R. A. Carlson

2005-12-08T23:59:59.000Z

317

SUBARU WEAK-LENSING STUDY OF A2163: BIMODAL MASS STRUCTURE  

Science Conference Proceedings (OSTI)

We present a weak-lensing analysis of the merging cluster A2163 using Subaru/Suprime-Cam and CFHT/Mega-Cam data and discuss the dynamics of this cluster merger, based on complementary weak-lensing, X-ray, and optical spectroscopic data sets. From two-dimensional multi-component weak-lensing analysis, we reveal that the cluster mass distribution is well described by three main components including the two-component main cluster A2163-A with mass ratio 1:8, and its cluster satellite A2163-B. The bimodal mass distribution in A2163-A is similar to the galaxy density distribution, but appears as spatially segregated from the brightest X-ray emitting gas region. We discuss the possible origins of this gas-dark-matter offset and suggest the gas core of the A2163-A subcluster has been stripped away by ram pressure from its dark matter component. The survival of this gas core from the tidal forces exerted by the main cluster lets us infer a subcluster accretion with a non-zero impact parameter. Dominated by the most massive component of A2163-A, the mass distribution of A2163 is well described by a universal Navarro-Frenk-White profile as shown by a one-dimensional tangential shear analysis, while the singular-isothermal sphere profile is strongly ruled out. Comparing this cluster mass profile with profiles derived assuming intracluster medium hydrostatic equilibrium (H.E.) in two opposite regions of the cluster atmosphere has allowed us to confirm the prediction of a departure from H.E. in the eastern cluster side, presumably due to shock heating. Yielding a cluster mass estimate of M{sub 500} = 11.18{sup +1.64}{sub -1.46} Multiplication-Sign 10{sup 14} h {sup -1} M{sub Sun }, our mass profile confirms the exceptionally high mass of A2163, consistent with previous analyses relying on the cluster dynamical analysis and Y{sub X} mass proxy.

Okabe, N. [Academia Sinica Institute of Astronomy and Astrophysics (ASIAA), P.O. Box 23-141, Taipei 10617, Taiwan (China); Bourdin, H.; Mazzotta, P. [Dipartimento di Fisica, Universita degli Studi di Roma 'Tor Vergata', via della Ricerca Scientifica 1, 00133 Roma (Italy); Maurogordato, S., E-mail: okabe@asiaa.sinica.edu.tw [Universite de Nice Sophia-Antipolis, CNRS, Laboratoire Cassiopee, CNRS, UMR 6202, Observatoire de la Cote d' Azur, BP4229, 06304 Nice Cedex 4 (France)

2011-11-10T23:59:59.000Z

318

Intrinsic fluctuation effects and certain other aspects of superconducting weak links  

SciTech Connect

Thesis. Recent theoretical developments have led to evermore refined theories for the Josephson effects in a variety of superconducting weak link'' structures. One of the major refinements has been the inclusion of the effects of intrinsic thermal fluctuations upon Josephson-like behavior. Some other developments include the investigation of mechanisms for the origin of the Josephson effects in non-tunneling structures, and equivalent circuit representations. Experimental investigations were made which encompass both of these areas; with special emphaais placed upon fluctuation effects; in pariicular, the effect of fluctuations upon the driven dc Josephson effect has been studied in considerable detail. The weak links studied included niobium point contacts, tin whisker'' crystals, and tin thin film bridges, the latter fabricated via an optical photoresist technique. The experiments were conducted in a temperature regime which extended to within a few mK of T/sub c/, the regime in which fluctuation effects are enhanced (and thus tnore experimentally accessible). The data consisted of relatively high resolution (ln V) low noise 1- -V characteristics obtained with an apparatus which incorporated ( plus or minus 10 mu K) temperature control with wide-band rf transmission, in a highly shielded environment. Experiniental rf-induced step pi-ofiles (the driven ac Josephsorin effect) and zero voltage step profiles (the dc Josephson effect) were compared in detail with the relevant intrinsic fluctuation theories (due to Ambegaokar, Halperin, and Stephen) via a one parameter fit, using the respective no-fluctuation step amplitude as she (natural) fitting parameter. We were able to distinguish between external noise effects and intrinsic effects and effectively excluded external noise; thus we maintain a high degree of confidence that the effects reported are indeed intrinsic to the weak links themselves. The agreement between thcory arind experinient was found to be very good in both the driven and the dc effects over a wide range of experimertal parameters and the single-parameter fits yielded step heights which corresponded reasonably well to the dc critical currents. These results indicate that the conceptually simple theory in which thermal fluctuations are introduced as a rapidly fluctuating (Langevin) force and a tilted periodic potential is introduced by the coupling energy (dc effect) or by phase locking to incident radiation (driven ac effect) provides a rather good description of the intrinsic fluctuation phenomena in superconducting weak links of negligible capacitance. The broad applicability of the theoretical concepts is indicated by the consisterincy between the dc and driven effect results, and by-the wide range of parameters over which convincing agreement between theory and experiment was obtained. By making some observations in regimes where fluctuation effects were diminished. evidence was found that slight deviations that were observed in the fluctuation experments could be attributed to deviations from the no-fluctuation model used as the starting point in the fluctuation theories. Supplemental considerations related to junction modeling were also pursued to a certain degree and irin some cases, led to new results or confirmations of recently discovered results of other researchers. These observations included 1--V comparisons, rf step amplitude vs voltage dependences, rf step threshold frequencies, and the Dayem --Wyatt effect. (122 references, 84 figures) (auth)

Henkels, W.H.

1974-01-01T23:59:59.000Z

319

Weak dispersive forces between glass-gold macroscopic surfaces in alcohols  

E-Print Network (OSTI)

In this work we concentrate on an experimental validation of the Lifshitz theory for van der Waals and Casimir forces in gold-alcohol-glass systems. From this theory weak dispersive forces are predicted when the dielectric properties of the intervening medium become comparable to one of the interacting surfaces. Using inverse colloid probe atomic force microscopy dispersive forces were measured occasionally and under controlled conditions by addition of salt to screen the electrostatic double layer force if present. The dispersive force was found to be attractive, and an order of magnitude weaker than that in air. Although the theoretical description of the forces becomes less precise for these systems even with full knowledge of the dielectric properties, we find still our results in reasonable agreement with Lifshitz theory.

P. J. van Zwol; G. Palasantzas; J. Th. M. DeHosson

2009-04-03T23:59:59.000Z

320

Diffusivity and Weak Clustering in a Quasi 2D Granular Gas  

E-Print Network (OSTI)

We present results from a detailed simulation of a quasi-2D dissipative granular gas, kept in a non-condensed steady state via vertical shaking over a rough substrate. This gas shows a weak power-law decay in the tails of its Pair Distribution Functions (PDF's), indicating fractality and therefore a tendency to form clusters over several size scales. This clustering depends monotonically on the dissipation coefficient, and disappears when the sphere-sphere collisions are conservative. Clustering is also sensitive to the packing fraction. This gas also displays the standard nonequilibrium characteristics of similar systems, including non-Maxwellian velocity distributions. The diffusion coefficients are calculated over all the conditions of the simulations, and it is found that diluted gases are more diffusive for smaller restitution coefficients.

J. A. Perera-Burgos; G. Perez-Angel; Y. Nahmad-Molinari

2010-06-01T23:59:59.000Z

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321

Weak and Strong Coupling Theories for Polarizable Colloids and Nano-Particles  

E-Print Network (OSTI)

A theory is presented which allows us to accurately calculate the density profile of monovalent and multivalent counterions in suspensions of polarizable colloids or nano-particles. In the case of monovalent ions, we derive a weak-coupling theory that explicitly accounts for the ion-image interaction, leading to a modified Poisson-Boltzmann equation. For suspensions with multivalent counterions, a strong-coupling theory is used to calculate the density profile near the colloidal surface and a Poisson-Boltzmann equation with a renormalized boundary condition to account for the counterion distribution in the far-field. All the results are compared with the Monte Carlo simulations, showing an excellent agreement between the theory and the simulations.

Amin Bakhshandeh; Alexandre Pereira dos Santos; Yan Levin

2011-09-21T23:59:59.000Z

322

Strong effect of weak diffusion on scalar turbulence at large scales  

E-Print Network (OSTI)

Passive scalar turbulence forced steadily is characterized by the velocity correlation scale, $L$, injection scale, $l$, and diffusive scale, $r_d$. The scales are well separated if the diffusivity is small, $r_d\\ll l,L$, and one normally says that effects of diffusion are confined to smaller scales, $r\\ll r_d$. However, if the velocity is single scale one finds that a weak dependence of the scalar correlations on the molecular diffusivity persists to even larger scales, e.g. $l\\gg r\\gg r_d$ \\cite{95BCKL}. We consider the case of $L\\gg l$ and report a counter-intuitive result -- the emergence of a new range of large scales, $L\\gg r\\gg l^2/r_d$, where the diffusivity shows a strong effect on scalar correlations.

M. Chertkov; I. Kolokolov; V. Lebedev

2007-06-20T23:59:59.000Z

323

Primordial production of massive relic gravitational waves from a weak modification of General Relativity  

E-Print Network (OSTI)

The production of a stochastic background of relic gravitational waves is well known in various works in the literature, where, using the so called adiabatically-amplified zero-point fluctuations process it has been shown how the standard inflationary scenario for the early universe can in principle provide a distinctive spectrum of relic gravitational waves. In this paper, it is shown that a weak modification of General Relativity produces a third massive polarization of gravitational waves and the primordial production of this polarization is analysed adapting the adiabatically-amplified zero-point fluctuations process at this case. The presence of the mass could also have important applications in cosmology as the fact that gravitational waves can have mass could give a contribution to the dark matter of the Universe. At the end of the paper an upper bound for these relic gravitational waves, which arises from the WMAP constrains, is also released.

Christian Corda

2008-12-02T23:59:59.000Z

324

Estimates in Generalized Morrey Spaces for Weak Solutions to Divergence Degenerate Parabolic Systems  

E-Print Network (OSTI)

Let $\\mathrm{X}=(X_{1},...,X_{q})$ be a family of real smooth vector fields satisfying H\\"{o}mander's condition. The purpose of this paper is to establish gradient estimates in generalized Morrey spaces for weak solutions of the divergence degenerate parabolic system related to $X$ :%\\[u_{t}^{i}+X_{\\alpha}^{\\ast}(a_{ij}^{\\alpha\\beta}(z)X_{\\beta}u^{j}%)=g_{i}+X_{\\alpha}^{\\ast}f_{i}^{\\alpha}(z), \\] where $\\alpha,\\beta=1,2,...,q,$ $i,j=1,2,...,N$, $X_{\\alpha}^{\\ast}$ is the transposed vector field of $X_{\\alpha}$, $z=(t,x)\\in{\\mathbb{R}}^{n+1}$, and coefficients $a_{ij}^{\\alpha\\beta}(z)$ belong to the space $VMO$ induced by the vector fields $X_{1}, ...,X_{q}$.

Dong, Yan; Niu, Pengcheng

2011-01-01T23:59:59.000Z

325

Deformed Coordinate-Space Hartree-Fock-Bogoliubov Approach to Weakly Bound Nuclei and Large Deformations  

E-Print Network (OSTI)

The coordinate space formulation of the Hartree-Fock-Bogoliubov (HFB) method enables self-consistent treatment of mean-field and pairing in weakly bound systems whose properties are affected by the particle continuum space. Of particular interest are neutron-rich, deformed drip-line nuclei which can exhibit novel properties associated with neutron skin. To describe such systems theoretically, we developed an accurate 2D lattice Skyrme-HFB solver {\\hfbax} based on B-splines. Compared to previous implementations, we made a number of improvements aimed at boosting the solver's performance. These include: explicit imposition of axiality and space inversion, use of the modified Broyden's method to solve self-consistent equations, and a partial parallelization of the code. {\\hfbax} has been benchmarked against other HFB solvers, both spherical and deformed, and the accuracy of the B-spline expansion was tested by employing the multiresolution wavelet method. Illustrative calculations are carried out for stable and ...

Pei, J C; Fann, G I; Nazarewicz, W; Schunck, N; Xu, F R

2008-01-01T23:59:59.000Z

326

Storage and recall of weak coherent optical pulses with an efficiency of 25%  

E-Print Network (OSTI)

We demonstrate experimentally a quantum memory scheme for the storage of weak coherent light pulses in an inhomogeneously broadened optical transition in a Pr^{3+}: YSO crystal at 2.1 K. Precise optical pumping using a frequency stable (about 1kHz linewidth) laser is employed to create a highly controllable Atomic Frequency Comb (AFC) structure. We report single photon storage and retrieval efficiencies of 25%, based on coherent photon echo type re-emission in the forward direction. The coherence property of the quantum memory is proved through interference between a super Gaussian pulse and the emitted echo. Backward retrieval of the photon echo emission has potential for increasing storage and recall efficiency.

M. Sabooni; F. Beaudoin; A. Walther; N. Lin; A. Amari; M. Huang; S. Kröll

2009-12-14T23:59:59.000Z

327

Storage and recall of weak coherent optical pulses with an efficiency of 25%  

E-Print Network (OSTI)

We demonstrate experimentally a quantum memory scheme for the storage of weak coherent light pulses in an inhomogeneously broadened optical transition in a Pr^{3+}: YSO crystal at 2.1 K. Precise optical pumping using a frequency stable (about 1kHz linewidth) laser is employed to create a highly controllable Atomic Frequency Comb (AFC) structure. We report single photon storage and retrieval efficiencies of 25%, based on coherent photon echo type re-emission in the forward direction. The coherence property of the quantum memory is proved through interference between a super Gaussian pulse and the emitted echo. Backward retrieval of the photon echo emission has potential for increasing storage and recall efficiency.

Sabooni, M; Walther, A; Lin, N; Amari, A; Huang, M; Kröll, S

2009-01-01T23:59:59.000Z

328

A generalized lens equation for light deflection in weak gravitational fields  

E-Print Network (OSTI)

A generalized lens equation for weak gravitational fields in Schwarzschild metric and valid for finite distances of source and observer from the light deflecting body is suggested. The magnitude of neglected terms in the generalized lens equation is estimated to be smaller than or equal to 15 Pi/4 (m/d')^2, where m is the Schwarzschild radius of massive body and d' is Chandrasekhar's impact parameter. The main applications of this generalized lens equation are extreme astrometrical configurations, where 'Standard post-Newtonian approach' as well as 'Classical lens equation' cannot be applied. It is shown that in the appropriate limits the proposed lens equation yields the known post-Newtonian terms, 'enhanced' post-post-Newtonian terms and the Classical lens equation, thus provides a link between these both essential approaches for determining the light deflection.

Sven Zschocke

2011-05-18T23:59:59.000Z

329

Bayesian inference of solar and stellar magnetic fields in the weak-field approximation  

E-Print Network (OSTI)

The weak-field approximation is one of the simplest models that allows us to relate the observed polarization induced by the Zeeman effect with the magnetic field vector present on the plasma of interest. It is usually applied for diagnosing magnetic fields in the solar and stellar atmospheres. A fully Bayesian approach to the inference of magnetic properties in unresolved structures is presented. The analytical expression for the marginal posterior distribution is obtained, from which we can obtain statistically relevant information about the model parameters. The role of a-priori information is discussed and a hierarchical procedure is presented that gives robust results that are almost insensitive to the precise election of the prior. The strength of the formalism is demonstrated through an application to IMaX data. Bayesian methods can optimally exploit data from filter-polarimeters given the scarcity of spectral information as compared with spectro-polarimeters. The effect of noise and how it degrades ou...

Ramos, A Asensio

2011-01-01T23:59:59.000Z

330

Real space estimator for the weak lensing convergence from the CMB  

E-Print Network (OSTI)

We propose an estimator defined in real space for the reconstruction of the weak lensing potential due to the intervening large scale structure from high resolution maps of the cosmic microwave background. This estimator was motivated as an alternative to the quadratic estimator in harmonic space to surpass the difficulties of the analysis of maps containing galactic cuts and point source excisions. Using maps synthesised by pixel remapping, we implement the estimator for two experiments, namely one in the absence and one in the presence of detector noise, and compare the reconstruction of the convergence field with that obtained with the quadratic estimator defined in harmonic space. We find good agreement between the input and the reconstructed power spectra using the proposed real space estimator. We discuss interesting features of the real space estimator and future extensions of this work.

Carvalho, C S

2010-01-01T23:59:59.000Z

331

Fermionic-Bosonic Couplings in a Weakly Deformed Odd-Mass Nucleus ^{93}_{41}Nb  

SciTech Connect

A comprehensive level scheme of {sup 93}Nb below 2 MeV has been constructed from information obtained with the {sup 93}Nb(n,n{prime}{gamma}) and the {sup 94}Zr(p,2n{gamma}{gamma}){sup 93}Nb 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 {pi}1g{sub 9/2} {circle_times} {sub 40}{sup 92}Zr and {pi}2p{sub 1/2}{sup -1} {circle_times} {sub 42}{sup 94}Mo configurations. A microscopic interpretation of such excitations is obtained from shell-model calculations, which use low-momentum effective interactions.

Orce, J. N. [University of Kentucky, Lexington; Holt, J. D. [Oak Ridge National Laboratory (ORNL); Linnemann, A. [Universitat zu Koln, Koln, Germany; McKay, C. J. [University of Kentucky, Lexington; Fransen, C. [Universitat zu Koln, Koln, Germany; Jolie, J. [Universitat zu Koln, Koln, Germany; Kuo, T.T.S. [State University of New York, Stony Brook; Lesher, S. R. [University of Kentucky, Lexington; McEllistrem, M. T. [University of Kentucky, Lexington; Pietralla, N. [Universitat zu Koln, Koln, Germany; Warr, N. [Universitat zu Koln, Koln, Germany; Werner, V. [Universitat zu Koln, Koln, Germany; Yates, S. W. [University of Kentucky, Lexington

2010-01-01T23:59:59.000Z

332

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

NLE Websites -- All DOE Office Websites (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

333

Stochastic perturbation of integrable systems: a window to weakly chaotic systems  

E-Print Network (OSTI)

Integrable non-linear Hamiltonian systems perturbed by additive noise develop a Lyapunov instability, and are hence chaotic, for any amplitude of the perturbation. This phenomenon is related, but distinct, from Taylor's diffusion in hydrodynamics. We develop expressions for the Lyapunov exponents for the cases of white and colored noise. The situation described here being `multi-resonance' -- by nature well beyond the Kolmogorov-Arnold-Moser regime, it offers an analytic glimpse on the regime in which many near-integrable systems, such as some planetary systems, find themselves in practice. We show with the aid of a simple example, how one may model in some cases weakly chaotic deterministic systems by a stochastically perturbed one, with good qualitative results.

Khanh-Dang Nguyen Thu Lam; Jorge Kurchan

2013-05-20T23:59:59.000Z

334

Shell model formalism for all hypernuclei types: A guide to solving the nonmesonic weak decay puzzle  

Science Conference Proceedings (OSTI)

We extend to odd-odd core hypernuclei our independent particle shell model (IPSM) formalism developed previously for the evaluation of the {gamma}{sub NM},{gamma}{sub n/p}, and a{sub {lambda}} hypernuclear weak decay observables. The present procedure reproduces the even-odd and even-even core results as particular cases. Adopting the standard strangeness-changing weak {lambda}N{yields}NN transition potential with exchange of the complete pseudoscalar and vector meson octets ({pi},{eta},K,{rho},{omega},K*) we get simple analytical expressions for all observables. Numerical values for {sub {lambda}}{sup 4}He,{sub {lambda}}{sup 5}He, {sub {lambda}}{sup 11}B,{sub {lambda}}{sup 12}C,{sub {lambda}}{sup 16}O, {sub {lambda}}{sup 17}O, and {sub {lambda}}{sup 28}Si hypernuclei are obtained and compared with available experimental data, putting special attention on the asymmetry parameter. We remark that, in the present form, the IPSM gives roughly the same value of a{sub {lambda}} for all hypernuclei in contradiction with experiments. We stress the necessity of introducing configuration mixing to go beyond the IPSM taking into account, in a more realistic way, nuclear structure effects. Moreover, one could to include more relevant degrees of freedom, even within the IPSM framework, like: (i) modifications of the exchange potential (two-pion, a{sub 1} meson, {delta}T=3/2 terms of vector mesons, etc.), (ii) final state interactions accounting for the distortion of the plane waves of emitted nucleons, and (iii) two-nucleon induced decay, as possible ways to solve the puzzle.

Barbero, C.; Mariano, A.; Samana, A. [Departamento de Fisica, Universidad Nacional de La Plata, C. C. 67, 1900 La Plata (Argentina) and Instituto de Fisica CCT La Plata, CONICET, 1900 La Plata (Argentina); Department of Physics, Texas A and M University-Commerce, P. O. Box 3011, Commerce, Texas (United States)

2008-10-15T23:59:59.000Z

335

Measurement of the parity nonconserving neutral weak interaction in atomic thallium  

Science Conference Proceedings (OSTI)

This thesis describes an experiment to measure parity nonconservation in atomic thallium. A frequency doubled, flashlamp pumped tunable dye laser is used to excite the 6P/sub 1/2/(F = 0) ..-->.. 7P/sub 1/2/(F = 1) transition at 292.7 nm, with circularly polarized light. An electrostatic field E of 100 to 300 V/cm causes this transition to occur via Stark induced electric dipole. Two field free transitions may also occur: a highly forbidden magnetic dipole M, and a parity nonconserving electric dipole epsilon/sub P/. The latter is presumed to be due to the presence of a weak neutral current interaction between the 6p valence electron and the nucleus, as predicted by gauge theories which unite the electromagnetic and weak interactions. Both M and epsilon/sub P/ interfere with the Stark amplitude ..beta..E to produce a polarization of the 7P/sub 1/2/ state. This is measured with a circularly polarized infrared laser beam probe, tuned to the 7P/sub 1/2/ ..-->.. 8S/sub 1/2/ transition. This selectively excites m/sub F/ = +1 or -1 components of the 7P/sub 1/2/ state, and the polarization is seen as an asymmetry in 8S ..-->.. 6P/sub 3/2/ fluorescence when the probe helicity is reversed. The polarization due to M is ..delta../sub M/ = -2M/(BETAE). It is used to calibrate the analyzing efficiency. The polarization due to epsilon/sub P/ is ..delta../sub P/ = 2i epsilon/sub P//(..beta..E), and can be distinguished from ..delta../sub M/ by its properties under reversal of the 292.7 nm photon helicity and reversal of the laser direction. A preliminary measurement yielded a parity violation in agreement with the gauge theory of Weinberg and Salam.

Bucksbaum, P.H.

1980-11-01T23:59:59.000Z

336

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

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

337

An evaluation of known remaining oil resources in the state of Louisiana and Texas. Volume 3, Project on Advanced Oil Recovery and the States  

SciTech Connect

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 Louisiana and Texas. Individual reports for six other oil producing states and a national report have been separately published. The analysis presented in this report is based on the databases and models available in the Tertiary Oil Recovery Information System (TORIS).

Not Available

1994-11-01T23:59:59.000Z

338

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

Science Conference Proceedings (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

339

An evaluation of known remaining oil resources in the state of Kansas and Oklahoma. Volume 5, Project on Advanced Oil Recovery and the States  

SciTech Connect

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 Kansas, Illinois and Oklahoma for five 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 Kansas` 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 state of Kansas, Illinois and Oklahoma and the nation as a whole.

Not Available

1994-11-01T23:59:59.000Z

340

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

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

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

Highlights  

U.S. Energy Information Administration (EIA)

Highlights While generally showing less breadth in their range, world crude oil prices remained at robust levels in November. Debt-related problems in euro-zone

342

Weak-Lensing Detection at z~1.3: Measurement of the Two Lynx Clusters with Advanced Camera for Surveys  

E-Print Network (OSTI)

(Abridged) We present a HST/ACS weak-lensing study of RX J0849+4452 and RX J0848+4453, the two most distant (at z=1.26 and z=1.27, respectively) clusters yet measured with weak-lensing. The two clusters are separated by ~4' from each other and appear to form a supercluster in the Lynx field. Using our deep ACS F775W and F850LP imaging, we detected weak-lensing signals around both clusters at ~4 sigma levels. The mass distribution indicated by the reconstruction map is in good spatial agreement with the cluster galaxies. From the SIS fitting, we determined that RX J0849+4452 and RX J0848+4453 have similar projected masses of ~2.0x10^14 solar mass and ~2.1x10^14 solar mass, respectively, within a 0.5 Mpc (~60") aperture radius.

Jee, M J; Ford, H C; Holden, B; Illingworth, G D; Mei, S; White, R L

2006-01-01T23:59:59.000Z

343

Weak-Lensing Detection at z~1.3: Measurement of the Two Lynx Clusters with Advanced Camera for Surveys  

E-Print Network (OSTI)

(Abridged) We present a HST/ACS weak-lensing study of RX J0849+4452 and RX J0848+4453, the two most distant (at z=1.26 and z=1.27, respectively) clusters yet measured with weak-lensing. The two clusters are separated by ~4' from each other and appear to form a supercluster in the Lynx field. Using our deep ACS F775W and F850LP imaging, we detected weak-lensing signals around both clusters at ~4 sigma levels. The mass distribution indicated by the reconstruction map is in good spatial agreement with the cluster galaxies. From the SIS fitting, we determined that RX J0849+4452 and RX J0848+4453 have similar projected masses of ~2.0x10^14 solar mass and ~2.1x10^14 solar mass, respectively, within a 0.5 Mpc (~60") aperture radius.

M. J. Jee; R. L. White; H. C. Ford; G. D. Illingworth; J. P. Blakeslee; B. Holden; S. Mei

2006-01-16T23:59:59.000Z

344

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

SciTech Connect

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

345

Determining the effect of thermal loading on the remaining useful life of a power transformer from its impedance versus frequency characteristic  

SciTech Connect

It is well known that cellulose materials used to insulate transformer windings gradually degrade during service due to a combination of thermal, mechanical, and electrical stresses. As a result the mechanical characteristics of the paper change during use and may affect the useful life of the transformer. It has generally been assumed that the electrical characteristics remain relatively constant throughout the aging process. If, however, thermal aging changes the electrical characteristics, it may be possible to gauge the thermal age of a transformer by externally monitoring these electrical characteristics over time. In this work, samples of oil impregnated thermally upgraded Kraft insulating paper are subjected to accelerated thermal aging. The relative dielectric constant and loss tangent are investigated by monitoring changes in capacitance and conductance as a function of frequency and thermal aging. This paper presents data showing that the thermal aging process produces changes in the electrical characteristics of the insulating system paper. An example is presented comparing the admittance versus frequency for a model of a 765 kV 500 MVA auto transformer. This demonstrates that the effect of aging can theoretically be observed from the terminals of the transformer.

Batruni, R.; Degeneff, R.C. [Rensselaer Polytechnic Inst., Troy, NY (United States). Electric Power Engineering Dept.; Lebow, M.A. [Consolidated Edison Co., New York, NY (United States)

1996-07-01T23:59:59.000Z

346

The effect of 12C + 12C rate uncertainties on the weak s-process component  

SciTech Connect

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

347

Interface width effect on the classical Rayleigh-Taylor instability in the weakly nonlinear regime  

SciTech Connect

In this paper, the interface width effects (i.e., the density gradient effects or the density transition layer effects) on the Rayleigh-Taylor instability (RTI) in the weakly nonlinear (WN) regime are investigated by numerical simulation (NS). It is found that the interface width effects dramatically influence the linear growth rate in the linear growth regime and the mode coupling process in the WN growth regime. First, the interface width effects decrease the linear growth rate of the RTI, particularly for the short perturbation wavelengths. Second, the interface width effects suppress (reduce) the third-order feedback to the fundamental mode, which induces the nonlinear saturation amplitude (NSA) to exceed the classical prediction, 0.1lambda. The wider the density transition layer is, the larger the NSA is. The NSA in our NS can reach a half of its perturbation wavelength. Finally, the interface width effects suppress the generation and the growth of the second and the third harmonics. The ability to suppress the harmonics' growth increases with the interface width but decreases with the perturbation wavelength. On the whole, in the WN regime, the interface width effects stabilize the RTI, except for an enhancement of the NSA, which is expected to improve the understanding of the formation mechanism for the astrophysical jets, and for the jetlike long spikes in the high energy density physics.

Wang, L. F. [LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083 (China); Ye, W. H. [LCP, Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Department of Physics, Zhejiang University, Hangzhou 310027, China and CAPT, Peking University, Beijing 100871 (China); Li, Y. J. [State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing 100083 (China)

2010-05-15T23:59:59.000Z

348

Weakness of accelerator bounds on electron superluminality without a preferred frame  

E-Print Network (OSTI)

The reference laboratory bounds on superluminality of the electron are obtained from the absence of in-vacuo Cherenkov processes and the determinations of synchrotron radiated power for LEP electrons. It is usually assumed that these analyses establish the validity of a standard special-relativistic description of the electron with accuracy of at least a few parts in $10^{14}$, and in particular this is used to exclude electron superluminality with such an accuracy. We observe that these bounds rely crucially on the availability of a preferred frame. In-vacuo-Cherenkov processes are automatically forbidden in any theory with "deformed Lorentz symmetry", relativistic theories that, while different from Special Relativity, preserve the relativity of inertial frames. Determinations of the synchrotron radiated power can be used to constrain the possibility of Lorentz-symmetry deformation, but provide rather weak bounds, which in particular for electron superluminality we establish to afford us no more constraining power than for an accuracy of a few parts in $10^4$. We argue that this observation can have only a limited role in the ongoing effort of analysis of the anomaly tentatively reported by the OPERA collaboration, but we stress that it could provide a valuable case study for assessing the limitations of "indirect" tests of fundamental laws of physics.

Giovanni Amelino-Camelia; Giulia Gubitosi; Niccoló Loret; Flavio Mercati; Giacomo Rosati

2011-11-03T23:59:59.000Z

349

Precision Beam Parameter Monitoring in a Measurement of the Weak Mixing Angle in Moeller Scattering  

DOE Green Energy (OSTI)

A precision measurement of the parity nonconserving left-right asymmetry, A{sub LR}, in Moeller scattering (e{sup -}e{sup -} {yields} e{sup -}e{sup -}) is currently in progress at the Stanford Linear Accelerator Center (SLAC). This experiment, labeled SLAC-E158, scatters longitudinally polarized electrons off atomic electrons in an unpolarized hydrogen target at a Q{sup 2} of 0.03 (GeV/c){sup 2}. The asymmetry, which is the fractional difference in the scattering cross-sections, measures the effective pseudo-scalar weak neutral current coupling, g{sub ee}, governing Moeller scattering. This quantity is in turn proportional to (1/4 - sin{sup 2} {theta}{sub w}), where {theta}{sub w} is the electroweak mixing angle. The goal is to measure the asymmetry to a precision of 1 x 10{sup -8} which corresponds to {delta}(sin{sup 2} {theta}{sub w}) {approx} 0.0007. Since A{sub LR} is a function of the cross-sections, and the cross-sections depend on the beam parameters, the desired precision of A{sub LR} places stringent requirements on the beam parameters. This paper investigates the requirements on the beam parameters and discusses the means by which they are monitored and accounted for.

Cooke, M.S.

2005-04-11T23:59:59.000Z

350

A Precision Low-Energy Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Green Energy (OSTI)

The E-158 experiment at the Stanford Linear Accelerator Center (SLAC) measures the parity-violating cross-section asymmetry in electron-electron (Moeller) scattering at low Q{sup 2}. This asymmetry, whose Standard Model prediction is roughly -150 parts per billion (ppb), is directly proportional to (1-4 sin{sup 2} {theta}{sub W}), where {theta}{sub W} is the weak mixing angle. Measuring this asymmetry to within 10% provides an important test of the Standard Model at the quantum loop level and probes for new physics at the TeV scale. The experiment employs the SLAC 50 GeV electron beam, scattering it off a liquid hydrogen target. A system of magnets and collimators is used to isolate and focus the Moeller scattering events into an integrating calorimeter. The electron beam is generated at the source using a strained, gradient-doped GaAs photocathode, which produces roughly 5 x 10{sup 11} electrons/pulse (at a beam rate of 120 Hz) with {approx} 80% longitudinal polarization. The helicity of the beam can be rapidly switched, eliminating problems associated with slow drifts. Helicity-correlations in the beam parameters (charge, position, angle and energy) are minimized at the source and corrected for using precision beam monitoring devices.

Mastromarino, P.

2005-01-26T23:59:59.000Z

351

INTERPOLATING MASKED WEAK-LENSING SIGNAL WITH KARHUNEN-LOEVE ANALYSIS  

SciTech Connect

We explore the utility of Karhunen-Loeve (KL) analysis in solving practical problems in the analysis of gravitational shear surveys. Shear catalogs from large-field weak-lensing surveys will be subject to many systematic limitations, notably incomplete coverage and pixel-level masking due to foreground sources. We develop a method to use two-dimensional KL eigenmodes of shear to interpolate noisy shear measurements across masked regions. We explore the results of this method with simulated shear catalogs, using statistics of high-convergence regions in the resulting map. We find that the KL procedure not only minimizes the bias due to masked regions in the field, it also reduces spurious peak counts from shape noise by a factor of {approx}3 in the cosmologically sensitive regime. This indicates that KL reconstructions of masked shear are not only useful for creating robust convergence maps from masked shear catalogs, but also offer promise of improved parameter constraints within studies of shear peak statistics.

VanderPlas, J. T.; Connolly, A. J. [Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States); Jain, B.; Jarvis, M. [Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA 19104-6396 (United States)

2012-01-10T23:59:59.000Z

352

Weak lensing mass map and peak statistics in CFHT/Stripe82 survey  

E-Print Network (OSTI)

We present the weak lensing mass map of the 173 tiles Canada-France-Hawaii Telescope Stripe82 Survey (CS82) with the effective area ~124 square degrees and study the peak statistics, including peak abundance, correlation functions and tangential-shear profile of peaks with the mass map. We find that (1) peak abundance detected in CS82 are consistent with predictions from a Lambda-CDM cosmological model, once noise effects are properly included; (2) correlation function of peaks with different signal-to-noise ratio (SNR) can be well fitted with power laws. Combining with the SDSS-III/Constant Mass (CMASS) galaxies, the cross-correlation between CMASS galaxies and high SNR peaks can be well-fitted with a power law; (3) the tangential shear profiles of the peaks increase with SNR. We concentrate on fitting spherical models to the tangential profiles with both singular isothermal sphere (SIS) and Navarro Frenk & White (NFW) models. For the high SNR peaks, the SIS model is rejected at ~3-sigma. Comparing the D...

Shan, HuanYuan; Comparat, Johan; Jullo, Eric; Charbonnier, Aldee; Erben, Thomas; Makler, Martin; Moraes, Bruno; Van Waerbeke, Ludovic; Courbin, Frederic; Meylan, George; Tao, Charling; Taylor, James E

2013-01-01T23:59:59.000Z

353

More about the hypothesis of a new weak interaction of electromagnetic field in the hidden sector  

E-Print Network (OSTI)

New hypothetical field equations (Eqs. (1) and (2)) are further discussed, unifying Maxwell's equations of the Standard Model (after the electroweak symmetry is spontaneously broken) with the dynamics of hidden sector (expected to be responsible for the cold dark matter). The hidden sector is represented by sterile spin-1/2 Dirac fermions ("sterinos") and sterile spin-0 bosons ("sterons") whose masses are spontaneously generated by a nonzero vacuum expectation value of the steron field, while sterino and steron interactions are mediated by sterile spin-1 quanta of an antisymmetric-tensor field with a large mass scale ("A bosons"). These interactions are presumed to be weak, but stronger than the universal gravity. Beside sterinos and sterons, the Standard-Model photons are included into the source of sterile A bosons and so, they become a link between the hidden and Standard-Model sectors ("photonic portal" to the hidden sector). The relativistic structure of antisymmetric-tensor field of sterile A bosons can be split into a vector and an axial three-dimensional fields (of spin 1 and parities - and +) in such a way that the Standard-Model electric and magnetic fields become involved separately in the sources of these two kinds of sterile A-boson radiation, respectively.

Wojciech Krolikowski

2009-03-30T23:59:59.000Z

354

Current-phase relation of a Bose-Einstein condensate flowing through a weak link  

Science Conference Proceedings (OSTI)

We study the current-phase relation of a Bose-Einstein condensate flowing through a repulsive square barrier by solving analytically the one-dimensional Gross-Pitaevskii equation. The barrier height and width fix the current-phase relation j({delta}{phi}), which tends to j{approx}cos({delta}{phi}/2) for weak barriers and to the Josephson sinusoidal relation j{approx}sin({delta}{phi}) for strong barriers. Between these two limits, the current-phase relation depends on the barrier width. In particular, for wide-enough barriers, we observe two families of multivalued current-phase relations. Diagrams belonging to the first family, already known in the literature, can have two different positive values of the current at the same phase difference. The second family, new to our knowledge, can instead allow for three different positive currents still corresponding to the same phase difference. Finally, we show that the multivalued behavior arises from the competition between hydrodynamic and nonlinear-dispersive components of the flow, the latter due to the presence of a soliton inside the barrier region.

Piazza, F.; Smerzi, A. [CNR-INFM BEC center and Dipartimento di Fisica, Universita di Trento, I-38050 Povo (Italy); Collins, L. A. [Theoretical Division, Mail Stop B214, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2010-03-15T23:59:59.000Z

355

Current-Phase Relation of a Bose-Einstein Condensate Flowing Through a Weak Link  

E-Print Network (OSTI)

We study the current-phase relation of a Bose-Einstein condensate flowing through a repulsive square barrier by solving analytically the one dimensional Gross-Pitaevskii equation. The barrier height and width fix the current-phase relation $j(\\delta\\phi)$, which tends to $j\\sim\\cos(\\delta\\phi/2)$ for weak barriers and to the Josephson sinusoidal relation $j\\sim\\sin(\\delta\\phi)$ for strong barriers. Between these two limits, the current-phase relation depends on the barrier width. In particular, for wide enough barriers, we observe two families of multivalued current-phase relations. Diagrams belonging to the first family, already known in the literature, can have two different positive values of the current at the same phase difference. The second family, new to our knowledge, can instead allow for three different positive currents still corresponding to the same phase difference. Finally, we show that the multivalued behavior arises from the competition between hydrodynamic and nonlinear-dispersive components of the flow, the latter due to the presence of a soliton inside the barrier region.

F. Piazza; L. A. Collins; A. Smerzi

2009-12-16T23:59:59.000Z

356

Detection of Weakly Conserved Ancestral Mammalian RegulatorySequences by Primate Comparisons  

Science Conference Proceedings (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

357

BAYESIAN INFERENCE OF SOLAR AND STELLAR MAGNETIC FIELDS IN THE WEAK-FIELD APPROXIMATION  

SciTech Connect

The weak-field approximation is one of the simplest models that allows us to relate the observed polarization induced by the Zeeman effect with the magnetic field vector present on the plasma of interest. It is usually applied for diagnosing magnetic fields in the solar and stellar atmospheres. A fully Bayesian approach to the inference of magnetic properties in unresolved structures is presented. The analytical expression for the marginal posterior distribution is obtained, from which we can obtain statistically relevant information about the model parameters. The role of a priori information is discussed and a hierarchical procedure is presented that gives robust results that are almost insensitive to the precise election of the prior. The strength of the formalism is demonstrated through an application to IMaX data. Bayesian methods can optimally exploit data from filter polarimeters given the scarcity of spectral information as compared with spectro-polarimeters. The effect of noise and how it degrades our ability to extract information from the Stokes profiles is analyzed in detail.

Asensio Ramos, A., E-mail: aasensio@iac.es [Instituto de Astrofisica de Canarias, 38205, La Laguna, Tenerife (Spain); Departamento de Astrofisica, Universidad de La Laguna, E-38205 La Laguna, Tenerife (Spain)

2011-04-10T23:59:59.000Z

358

Weak oil prices seen hindrance to pace of increase in gas use  

SciTech Connect

World demand for gas is expected to rocket, yet future natural gas and liquefied natural gas projects remain threatened by the link of gas prices to crude oil prices. This is the main message that emerged from the 19th World Gas Conference in Milan last week. A number of reports predicted regional demand for gas. All foresaw a rise. International Gas Union (IGU), organizer of the conference, and said world natural gas production has continued to rise despite a significant downturn in industrial production. The paper discusses gas demand in Europe, the correlation between oil and gas prices, the natural gas industry in Indonesia, Russia, and southern Europe.

Not Available

1994-06-27T23:59:59.000Z

359

Forced Waves in a Baroclinic Shear Flow. Part 2: Damped and Undamped Response to Weak Near-Resonant Forcing  

Science Conference Proceedings (OSTI)

This paper is a continuation of a study of the response of a two-layer baroclinic fluid to weak, near resonant planetary wave forcing. Unlike Part I (Plumb, 1979), the fluid is baroclinically stable and viscous damping is incorporated into the ...

R. Alan Plumb

1981-09-01T23:59:59.000Z

360

Mesoscale Convective Systems in Weakly Forced Large-Scale Environments. Part II: Generation of a Mesoscale Initial Condition  

Science Conference Proceedings (OSTI)

A series of five mesoscale convective systems (MCSs) developed within a weakly forced large-scale environment on 11 and 12 May 1982. Two of these systems had a large component of motion against the midtroposphoric flow and propagated in a ...

David J. Stensrud; J. Michael Fritsch

1994-09-01T23:59:59.000Z

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361

Mesoscale Convective Systems in Weakly Forced Large-Scale Environments. Part III: Numerical Simulations and Implications for Operational Forecasting  

Science Conference Proceedings (OSTI)

During a 24-h period, beginning 1200 UTC 11 May 1982, a series of mesoscale convective systems developed within a weakly forced large-scale environment. Two of these systems had a large component of motion against the midtropospheric flow and ...

David J. Stensrud; J. Michael Fritsch

1994-09-01T23:59:59.000Z

362

Chromospheric activity of ROSAT discovered weak-lined T Tauri stars  

E-Print Network (OSTI)

We have started a high resolution optical observation program dedicated to the study of chromospheric activity in weak-lined T Tauri stars (WTTS) recently discovered by the ROSAT All-Sky Survey (RASS). It is our purpose to quantify the phenomenology of the chromospheric activity of each star determining stellar surface fluxes in the more important chromospheric activity indicators (Ca II H & K, H_beta, H_alpha, Ca II IRT) as well as obtain the Li I abundance, a better determination of the stellar parameters, spectral type, and possible binarity. A large number of WTTS have been discovered by the RASS in and around differen star formation clouds.Whether these stars are really WTTS, or post-TTS, or even young main sequence stars is a matter of ongoing debate. However, we have centered our study only on objects for which very recent studies, of Li I abundance (greater than Pleiads of the same spectral type) or radio properties, clearly confirmed their pre-main sequence (PMS) nature. In this contribution we present preliminary results of our January 1998 high resolution echelle spectroscopic observations at the 2.1m telescope of the McDonald Observatory. We have analysed, using the spectral subtraction technique, the H_alpha and Ca II IRT lines of six WTTS (RXJ0312.8-0414NW, SE; RXJ0333.1+1036; RXJ0348.5+0832; RXJ0512.0+1020; RXJ0444.9+2717) located in and around the Taurus-Auriga molecular clouds. A broad and variable double-picked H_alpha emission is observed in RXJ0444.9+2717. Emission above the continuum in H_alpha and Ca II IRT lines is detected in RXJ0333.1+1036 and a filling-in of these lines is present in the rest of the stars. Our spectral type and Li I EW deterninations confirm the PMS nature of these objects.

D. Montes; L. W. Ramsey

1998-09-09T23:59:59.000Z

363

EFFECT OF AMBIPOLAR DIFFUSION ON THE NONLINEAR EVOLUTION OF MAGNETOROTATIONAL INSTABILITY IN WEAKLY IONIZED DISKS  

Science Conference Proceedings (OSTI)

We study the role of ambipolar diffusion (AD) on the nonlinear evolution of the magnetorotational instability (MRI) in protoplanetary disks using the strong coupling limit, which applies in very weakly ionized gas with electron recombination time much shorter than the orbital time so that a single-fluid treatment is sufficient. The effect of AD in this limit is characterized by the dimensionless number Am, the frequency at which neutral particles collides with ions normalized to the orbital frequency. We perform three-dimensional unstratified shearing-box simulations of the MRI over a wide range of Am as well as different magnetic field strengths and geometries. The saturation level of the MRI turbulence depends on the magnetic geometry and increases with the net magnetic flux. There is an upper limit to the net flux for sustained turbulence, corresponding to the requirement that the most unstable vertical wavelength be less than the disk scale height. Correspondingly, at a given Am, there exists a maximum value of the turbulent stress {alpha}{sub max}. For Am {approx}tight correlation between the turbulent stress {alpha} and the plasma ({beta}) {identical_to} P{sub gas}/P{sub mag} {approx} 1/2{alpha} at the saturated state of the MRI turbulence regardless of field geometry, and {alpha}{sub max} rapidly decreases with decreasing Am. In particular, we find {alpha}{sub max} {approx} 7 x 10{sup -3} for Am = 1 and {alpha}{sub max} {approx} 6 x 10{sup -4} for Am = 0.1.

Bai Xuening; Stone, James M., E-mail: xbai@astro.princeton.edu, E-mail: jstone@astro.princeton.edu [Department of Astrophysical Sciences, Princeton University, Princeton, NJ 08544 (United States)

2011-08-01T23:59:59.000Z

364

Coupling between interface and velocity perturbations in the weakly nonlinear Rayleigh-Taylor instability  

Science Conference Proceedings (OSTI)

Weakly nonlinear (WN) Rayleigh-Taylor instability (RTI) initiated by single-mode cosinusoidal interface and velocity perturbations is investigated analytically up to the third order. Expressions of the temporal evolutions of the amplitudes of the first three harmonics are derived. It is shown that there are coupling between interface and velocity perturbations, which plays a prominent role in the WN growth. When the 'equivalent amplitude' of the initial velocity perturbation, which is normalized by its linear growth rate, is compared to the amplitude of the initial interface perturbation, the coupling between them dominates the WN growth of the RTI. Furthermore, the RTI would be mitigated by initiating a velocity perturbation with a relative phase shift against the interface perturbation. More specifically, when the phase shift between the interface perturbation and the velocity perturbation is {pi} and their equivalent amplitudes are equal, the RTI could be completely quenched. If the equivalent amplitude of the initial velocity perturbation is equal to the initial interface perturbation, the difference between the WN growth of the RTI initiated by only an interface perturbation and by only a velocity perturbation is found to be asymptotically negligible. The dependence of the WN growth on the Atwood numbers and the initial perturbation amplitudes is discussed. In particular, we investigate the dependence of the saturation amplitude (time) of the fundamental mode on the Atwood numbers and the initial perturbation amplitudes. It is found that the Atwood numbers and the initial perturbation amplitudes play a crucial role in the WN growth of the RTI. Thus, it should be included in applications where the seeds of the RTI have velocity perturbations, such as inertial confinement fusion implosions and supernova explosions.

Wang, L. F.; Ye, W. H.; He, X. T. [HEDPS and CAPT, Peking University, Beijing 100871 (China); Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China); Wu, J. F.; Fan, Z. F.; Zhang, W. Y.; Dai, Z. S.; Gu, J. F.; Xue, C. [Institute of Applied Physics and Computational Mathematics, Beijing 100088 (China)

2012-11-15T23:59:59.000Z

365

How does breakup influence near-barrier fusion of weakly bound light nuclei ?  

E-Print Network (OSTI)

The influence on the fusion process of coupling to collective degrees of freedom has been explored. The significant enhancement of he fusion cross setion at sub-barrier energies was understood in terms of the dynamical processes arising from strong couplings to collective inelastic excitations of the target and projectile. However, in the case of reactions where breakup becomes an important process, conflicing model predictions and experimental results have been reported in the literature. Excitation functions for sub- and near-barrier total (complete + incomplete) fusion cross sections have been measured for the $^{6,7}$Li + $^{59}$Co at the Vivitron facility and at the 8UD Pelletron tandem facility using standard $\\gamma$-ray techniques. The data extend to medium-mass systems previous works exploring the coupling effects in fusion reactions of both lighter and heavier systems. Results of continuum-discretized coupled channel (CDCC) calculations indicate a small enhancement of total fusion for the more weakly bound $^{6}$Li at sub-barrier energies, with similar cross sections for both reactions at and above the barrier. A systematic study of $^{4,6}$He induced fusion reactions with the CDCC method is in progress. The understanding of the reaction dynamics involving couplings to the breakup channels requires th explicit measurement of precise elastic scattering data as well as yields leading to the breakup itself. Recent coincidence experiments for $^{6,7}$Li + $^{59}$Co are addressing this issue. The particle identification of the breakup products have been achieved by measuring the three-body final-state correlations.

C. Beck; N. Rowley; M. Rousseau; F. Haas; P. Bednarczyk; S. Courtin; N. Kintz; F. Hoellinger; P. Papka; S. Szilner; A. Sanchez I Zafra; A. Hachem; E. Martin; O. Stezowski; A. Diaz-Torres; F. A. Souza; A. Szanto De Toledo; A. Aissaoui; N. Carlin; R. Liguori Neto; M. G. Munhoz; J. Takahashi; A. A. P. Suade; M. M. De Moura; E. M. Szanto; K. Hagino; I. J. Thompson

2004-11-03T23:59:59.000Z

366

Correlated behavior of conductance and phase rigidity in the transition from the weak-coupling to the strong-coupling regime  

E-Print Network (OSTI)

We study the transmission through different small systems as a function of the coupling strength $v$ to the two attached leads. The leads are identical with only one propagating mode $\\xi^E_C$ in each of them. Besides the conductance $G$, we calculate the phase rigidity $\\rho$ of the scattering wave function $\\Psi^E_C$ in the interior of the system. Most interesting results are obtained in the regime of strongly overlapping resonance states where the crossover from staying to traveling modes takes place. The crossover is characterized by collective effects. Here, the conductance is plateau-like enhanced in some energy regions of finite length while corridors with zero transmission (total reflection) appear in other energy regions. This transmission picture depends only weakly on the spectrum of the closed system. It is caused by the alignment of some resonance states of the system with the propagating modes $\\xi^E_C$ in the leads. The alignment of resonance states takes place stepwise by resonance trapping, i.e. it is accompanied by the decoupling of other resonance states from the continuum of propagating modes. This process is quantitatively described by the phase rigidity $\\rho$ of the scattering wave function. Averaged over energy in the considered energy window, $$ is correlated with $1-$. In the regime of strong coupling, only two short-lived resonance states survive each aligned with one of the channel wave functions $\\xi^E_C$. They may be identified with traveling modes through the system. The remaining $M-2$ trapped narrow resonance states are well separated from one another.

E. N. Bulgakov; I. Rotter; A. F. Sadreev

2007-08-14T23:59:59.000Z

367

One pion production in neutrino-nucleon scattering and the different parametrizations of the weak $N\\rightarrow?$ vertex  

E-Print Network (OSTI)

The $N \\to \\Delta$ weak vertex provides an important contribution to the one pion production in neutrino-nucleon and neutrino-nucleus scattering for $\\pi N$ invariant masses below 1.4 GeV. Beyond its interest as a tool in neutrino detection and their background analyses, one pion production in neutrino-nucleon scattering is useful to test predictions based on the quark model and other internal symmetries of strong interactions. Here we try to establish a connection between two commonly used parametrizations of the weak $N \\to \\Delta$ vertex and form factors (FF) and we study their effects on the determination of the axial coupling $C_5^A(0)$, the common normalization of the axial FF, which is predicted to hold 1.2 by using the PCAC hypothesis. Predictions for the $\

C. Barbero; G. López Castro; A. Mariano

2013-11-14T23:59:59.000Z

368

Energy dependence of the optical potential of weakly and tightly bound nuclei as projectiles on a medium-mass target  

SciTech Connect

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

369

Intercept-resend attacks in the Bennett-Brassard 1984 quantum key distribution protocol with weak coherent pulses  

E-Print Network (OSTI)

Unconditional security proofs of the Bennett-Brassard protocol of quantum key distribution have been obtained recently. These proofs cover also practical implementations that utilize weak coherent pulses in the four signal polarizations. Proven secure rates leave open the possibility that new proofs or new public discussion protocols obtain larger rates over increased distance. In this paper we investigate limits to error rate and signal losses that can be tolerated by future protocols and proofs.

Marcos Curty; Norbert Lütkenhaus

2004-11-05T23:59:59.000Z

370

Proving the conservation of surface brightness during the strong and weak lensing of light by an isothermal sphere  

E-Print Network (OSTI)

An analytical proof of the conservation of surface brightness during the strong and weak lensing of light by a singular isothermal sphere is provided. It is shown that the movement of asymptotic rays provide room for precisely the extra solid angle claimed by the magnification of the centrally passing rays. Previous claim of a violation of this conservation law, leading to a problem over the COBE all sky CMB flux, is hereby withdrawn.

Richard Lieu

2004-09-27T23:59:59.000Z

371

The production of Tsallis entropy in the limit of weak chaos and a new indicator of chaoticity  

E-Print Network (OSTI)

We study the connection between the appearance of a `metastable' behavior of weakly chaotic orbits, characterized by a constant rate of increase of the Tsallis q-entropy (Tsallis 1988), and the solutions of the variational equations of motion for the same orbits. We demonstrate that the variational equations yield transient solutions, lasting for long time intervals, during which the length of deviation vectors of nearby orbits grows in time almost as a power-law. The associated power exponent can be simply related to the entropic exponent for which the q-entropy exhibits a constant rate of increase. This analysis leads to the definition of a new sensitive indicator distinguishing regular from weakly chaotic orbits, that we call `Average Power Law Exponent' (APLE). We compare the APLE with other established indicators of the literature. In particular, we give examples of application of the APLE in a) a thin separatrix layer of the standard map, b) the stickiness region around an island of stability in the same map, and c) the web of resonances of a 4D symplectic map. In all these cases we identify weakly chaotic orbits exhibiting the `metastable' behavior associated with the Tsallis q-entropy.

G. Lukes-Gerakopoulos; N. Voglis; C. Efthymiopoulos

2007-05-10T23:59:59.000Z

372

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)

the Gulf of Mexico. Red grouper are highly territorial and often remain at the same site for long periods in shallow waters of the Florida Keys and in adults offshore in marine reserves in the Gulf of Mexico. Dr

Watson, Craig A.

373

Neutron-Diffraction Evidence for the Ferrimagnetic Ground State of a Molecule-Based Magnet with Weakly Coupled Sublattices  

SciTech Connect

The diruthenium compound [Ru2(O2CMe)4]3[Cr(CN)6] contains two weakly coupled, ferrimag- netically ordered sublattices occupying the same volume. The magnetic field Hc 800 Oe required to align the two sublattice moments is proportional to the antiferromagnetic dipolar interaction Kc B Hc 5 10 3 meV between sublattices. Powder neutron-diffraction measurements on a deuterated sample reveal that the sublattice moments are restricted by the anisotropy of the diruthenium paddle-wheel complexes to the cubic diagonals. Those measurements also suggest that the quantum corrections to the ground state are significant.

Fishman, Randy Scott [ORNL; Campo, Javier [University of Zaragoza, Spain; Vos, Thomas E. [University of Utah; Miller, Joel S. [University of Utah

2012-01-01T23:59:59.000Z

374

Near- and subbarrier elastic and quasielastic scattering of the weakly bound {sup 6}Li projectile on {sup 144}Sm  

Science Conference Proceedings (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

375

A Liquid Hydrogen Target for Precision Measurement of the Weak Mixing Angle in Moller Scattering at SLAC  

DOE Green Energy (OSTI)

A 150 cm long liquid hydrogen target has been built for the SLAC End Station A E158 experiment. The target loop volume is 55 liters, and the maximum target heat load deposited by the electron beam is {approx} 700 W. The liquid hydrogen density fluctuation with full beam current (120 Hz repetition rate, 6 x 10{sup 11} electrons/spill) on target is well below 10{sup -4} level, which fulfills the requirement for a precision measurement of the weak mixing angle in the polarized electron-electron scattering process.

Weisend, John G

2002-11-07T23:59:59.000Z

376

Measuring the Weak Charge of the Proton and the Hadronic Parity Violation of the N -> {Delta} Transition  

SciTech Connect

Qweak will determine the weak charge of the proton, Q{sup p}{sub W}, via an asymmetry measurement of parity-violating elastic electron-proton scattering at low four momentum transfer to a precision of 4%. Q{sup p}{sub W} has a firm Standard Model prediction and is related to the weak mixing angle, sin{sup 2} {Theta}{sub W}, a well-defined Standard Model parameter. Qweak will probe a subset of new physics to the TeV mass scale and test the Standard Model. The details of how this measurement was performed and the analysis of the 25% elastic dataset will be presented in this thesis. Also, an analysis of an auxiliary measurement of the parity-violating asymmetry in the N -> {Delta} transition is presented. It is used as a systematic inelastic background correction in the elastic analysis and to extract information about the hadronic parity violation through the low energy constant, d{sub Delta}. The elastic asymmetry at Q{sup 2} = 0.0252 ± 0.0007 GeV{sup 2} was measured to be A{sub ep} = -265 ± 40 ± 22 ± 68 ppb (stat., sys., and blinding). Extrapolated to Q{sup 2} = 0, the value of the proton's weak charge was measured to be Q{sup p}{sub W} = 0.077 ± 0.019 (stat. and sys.) ± 0.026 (blinding). This is within 1 {sigma} of the Standard Model prediction of Q{sup p}{sub W} = 0.0705 ± 0.0008. The N -> {Delta} inelastic asymmetry at Q{sup 2} = 0.02078 ± 0.0005 GeV{sup 2} and W = 1205 MeV was measured to be A{sub inel} = -3.03 ± 0.65 ± 0.73 ± 0.07 ppm (stat., sys., and blinding). This result constrains the low energy constant to be d{sub {Delta}} = 5.8 ± 22g{sub {pi}}, and, if the result of the G0 experiment is included, d{sub {Delta}} = 5.8 ± 17g{sub {pi}}. This result rules out suggested large values of d{sub {Delta}} motivated by radiative hyperon decays. The elastic measurement is the first direct measurement of the weak charge of the proton while the inelastic measurement is only the second measurement of the neutral current excitation of the {Delta} resonance. It is currently the best constraint for the low energy constant, d{sub {Delta}.

John Leacock

2012-10-16T23:59:59.000Z

377

Emerging Weak Localization Effects on Topological Insulator-Insulating Ferromagnet (Bi_2Se_3-EuS) Interface  

E-Print Network (OSTI)

Thin films of topological insulator Bi_2Se_3 were deposited directly on insulating ferromagnetic EuS. Unusual negative magnetoresistance was observed near the zero field below the Curie temperature (T_C), resembling the weak localization effect; whereas the usual positive magnetoresistance was recovered above T_C. Such negative magnetoresistance was only observed for Bi_2Se_3 layers thinner than t~4nm, when its top and bottom surfaces are coupled. These results provide evidence for a proximity effect between a topological insulator and an insulating ferromagnet, laying the foundation for future realization of the half-integer quantized anomalous Hall effect in three-dimensional topological insulators.

Qi I. Yang; Merav Dolev; Li Zhang; Jinfeng Zhao; Alexander D. Fried; Elizabeth Schemm; Min Liu; Alexander Palevski; Ann F. Marshall; Subhash H. Risbud; Aharon Kapitulnik

2013-06-09T23:59:59.000Z

378

Reaction mechanisms for weakly-bound, stable nuclei and unstable, halo nuclei on medium-mass targets  

E-Print Network (OSTI)

An experimental overview of reactions induced by the stable, but weakly-bound nuclei 6Li, 7Li and 9Be, and by the exotic, halo nuclei 6He, 8B, 11Be and 17F on medium-mass targets, such as 58Ni, 59Co or 64Zn, is presented. Existing data on elastic scattering, total reaction cross sections, fusion processes, breakup and transfer channels are discussed in the framework of a CDCC approach taking into account the breakup degree of freedom.

Beck, C; Papka, P; Courtin, S; Souza, F A; Carlin, N; Neto, R Liguori; De Moura, M M; del Santo, M G; Suaide, A A I; Munhoz, M G; Szanto, E M; de Toledo, A Szanto; Keeley, N; Díaz-Torres, A; Hagino, K

2009-01-01T23:59:59.000Z

379

Methodology for Establishing Remaining Life of Components  

Science Conference Proceedings (OSTI)

When a plant's maintenance personnel develop component assessment procedures, a common step is to establish a methodology that considers the type of component, the materials of construction, the operating regimes, the degradation and failure mechanisms, failure history, lead times for repair, and the costs of refurbishment. A unifying view of condition assessment identifies active and potentially active damage mechanisms and is based on three kinds of information: the degree of damage currently in the co...

2009-03-31T23:59:59.000Z

380

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

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.


381

Slope exploration slow but hopes remain high  

SciTech Connect

Alaska North Slope exploratory drilling has been sparse this winter. Attention focused on a pair of ARCO alaska Inc. wildcats in the West Colville high sector west of Kuparuk River oil field and two BP Exploration (Alaska) Inc. wildcats in the Badami area at Mikkelson Bay. In both prospects, the drilling effort was to prove up more production that could support commercial development of the respective areas. Though there has been relatively little exploratory drilling this winter, both of the slope`s major producers have indicated they are far from finished with exploration in Alaska. The paper discusses the debate over the use of the Arctic National Wildlife Refuge, leasing and licensing, the federal leasing outlook, and Russian-US leasing.

NONE

1995-05-15T23:59:59.000Z

382

OGLE-2008-BLG-510: first automated real-time detection of a weak microlensing anomaly - brown dwarf or stellar binary?  

E-Print Network (OSTI)

The microlensing event OGLE-2008-BLG-510 is characterised by an evident asymmetric shape of the peak, promptly detected by the ARTEMiS system in real time. The skewness of the light curve appears to be compatible both with binary-lens and binary-source models, including the possibility that the lens system consists of an M dwarf orbited by a brown dwarf. The detection of this microlensing anomaly and our analysis demonstrates that: 1) automated real-time detection of weak microlensing anomalies with immediate feedback is feasible, efficient, and sensitive, 2) rather common weak features intrinsically come with ambiguities that are not easily resolved from photometric light curves, 3) a modelling approach that finds all features of parameter space rather than just the `favourite model' is required, and 4) the data quality is most crucial, where systematics can be confused with real features, in particular small higher-order effects such as orbital motion signatures. It moreover becomes apparent that events wit...

Bozza, V; Rattenbury, N J; Joergensen, U G; Tsapras, Y; Bramich, D M; Udalski, A; Bond, I A; Liebig, C; Cassan, A; Fouque, P; Fukui, A; Hundertmark, M; Shin, I -G; Lee, S H; Choi, J -Y; Park, S -Y; Gould, A; Allan, A; Mao, S; Wyrzykowski, L; Street, R A; Buckley, D; Nagayama, T; Mathiasen, M; Hinse, T C; Novati, S Calchi; Harpsoee, K; Mancini, L; Scarpetta, G; Anguita, T; Burgdorf, M J; Horne, K; Hornstrup, A; Kains, N; Kerins, E; Kjaergaard, P; Masi, G; Rahvar, S; Ricci, D; Snodgrass, C; Southworth, J; Steele, I A; Surdej, J; Thoene, C C; Wambsganss, J; Zub, M; Albrow, M D; Batista, V; Beaulieu, J -P; Bennett, D P; Caldwell, J A R; Cole, A; Cook, K H; Coutures, C; Dieters, S; Prester, D Dominis; Donatowicz, J; Greenhill, J; Kane, S R; Kubas, D; Marquette, J -B; Martin, R; Menzies, J; Pollard, K R; Sahu, K C; Williams, A; Szymanski, M K; Kubiak, M; Pietrzynski, G; Soszynski, I; Poleski, R; Ulaczyk, K; DePoy, D L; Dong, S; Han, C; Janczak, J; Lee, C -U; Pogge, R W; Abe, F; Furusawa, K; Hearnshaw, J B; Itow, Y; Kilmartin, P M; Korpela, A V; Lin, W; Ling, C H; Masuda, K; Matsubara, Y; Miyake, N; Muraki, Y; Ohnishi, K; Perrott, Y C; Saito, To; Skuljan, L; Sullivan, D J; Sumi, T; Suzuki, D; Sweatman, W L; Tristram, P J; Wada, K; Yock, P C M; Gulbis, A; Hashimoto, Y; Kniazev, A; Vaisanen, P

2012-01-01T23:59:59.000Z

383

Bounds on the number of bound states in the transfer matrix spectrum for some weakly correlated lattice models  

Science Conference Proceedings (OSTI)

We consider the interaction of particles in weakly correlated lattice quantum field theories. In the imaginary time functional integral formulation of these theories there is a relative coordinate lattice Schroedinger operator H which approximately describes the interaction of these particles. Scalar and vector spin, QCD and Gross-Neveu models are included in these theories. In the weakly correlated regime H=H{sub o}+W where H{sub o}=-{gamma}{Delta}{sub l}, 0 lattice Laplacian: {gamma}={beta}, the inverse temperature for spin systems and {gamma}={kappa}{sup 3} where {kappa} is the hopping parameter for QCD. W is a self-adjoint potential operator which may have non-local contributions but obeys the bound Double-Vertical-Line W(x, y) Double-Vertical-Line Less-Than-Or-Slanted-Equal-To cexp ( -a( Double-Vertical-Line x Double-Vertical-Line + Double-Vertical-Line y Double-Vertical-Line )), a large: exp-a={beta}/{beta}{sub o}{sup (1/2)}({kappa}/{kappa}{sub o}) for spin (QCD) models. H{sub o}, W, and H act in l{sub 2}(Z{sup d}), d Greater-Than-Or-Slanted-Equal-To 1. The spectrum of H below zero is known to be discrete and we obtain bounds on the number of states below zero. This number depends on the short range properties of W, i.e., the long range tail does not increase the number of states.

O'Carroll, Michael [Departamento de Matematica Aplicada e Estatistica, ICMC-USP, C.P. 668,13560-970 Sao Carlos, Sao Paulo (Brazil)

2012-07-15T23:59:59.000Z

384

On the Influence of Weak Magnetic and Electric Fields on the Fluctuations of Ionic Electric Currents in Blood Circulation  

E-Print Network (OSTI)

An analysis of a variety of existing experimental data leads to the conclusion on the existence of a resonance mechanism allowing weak magnetic fields to affect biological processes. These fields may either be static magnetic fields comparable in magnitude with the magnetic field of the earth or weak ultra-low frequency time-dependent fields. So far, a generally accepted theoretical model allowing one to understand the effect of magnetic and electric fields on biological processes is not available. By this reason, it is not clear which characteristics of the fields, like magnetic and electric field strength, frequency of change of the field, shape of the electromagnetic wave, the duration of the magnetic or electric influence or some particular combination of them, are responsible for the biological effect. In the present analysis it is shown that external time-independent magnetic fields may cause a resonance amplification of ionic electric currents in biological tissues and, in particular, in the vasculature system due to a Brownian motion of charges. These resonance electric currents may cause necrotic changes in the tissues or blood circulation and in this way significantly affect the biological organism. The magnitude of the magnetic fields leading to resonance effects is estimated, it is shown that it depends significantly on the radius of the blood capillaries.

Zakirjon Kanokov; Juern W. P. Schmelzer; Avazbek K. Nasirov

2009-04-07T23:59:59.000Z

385

CD-PAN: a protocol for peer-to-peer content distribution in a weakly connected and heterogeneous personal area network  

Science Conference Proceedings (OSTI)

This paper presents CD-PAN, a mechanism to automatically distribute content objects to weakly connected heterogeneous content devices in a personal area network without a global namespace. The content devices under consideration range from cell ...

Shiva Chaitanya; Prasenjit Sarkar

2008-11-01T23:59:59.000Z

386

Dynamic and Double-Diffusive Instabilities in a Weak Pycnocline: Part I: Observations of heat flux and diffusivity in the vicinity of Maud Rise, Weddell Sea  

Science Conference Proceedings (OSTI)

An expedition to study the stability of the weakly stratified water column in the eastern Weddell Sea was undertaken in the austral winter of 2005. A regional CTD survey around Maud Rise delineated water mass boundaries associated with flow around ...

William J. Shaw; Timothy P. Stanton

387

On emissions trading, toxic debt and the Australian power market  

SciTech Connect

Implementation of emissions trading will have profound effects on the financial stability of coal generators. While the impact on equity capital is well understood, the potential fallout in the market for project finance is not. During the current global financial crisis, the form and quantum of transitional assistance to coal generators will be crucial to ensure ongoing participation of domestic and foreign project banks in the power markets. (author)

Simshauser, Paul

2009-03-15T23:59:59.000Z

388

Noninvasive Realistic Stimulation/Recording of Freely Swimming Weakly Electric Fish: Movement Detection and Discharge Entropy to Infer Fish Behavior  

E-Print Network (OSTI)

Weakly electric fish are unique models in Neuroscience allowing experimentalists to access, with non invasive techniques,a central nervous system generated spatio-temporal electric pattern of pulses with roles in at least two complex and not yet completely understood abilities:electrocommunication and electrolocation. We developed an apparatus to allow realistic stimulation and simultaneous recording of electric pulses in freely moving Gymnotus carapo for very long periods-several days. Voltage time series from a 3dimensional array of sensitive dipoles that detects electric field in several positions underwater were digitized and home made real-time software allowed reliable recording of pulse timestamps,independently of the fish's position,and also to infer fish movement. A stimulus fish was mimicked by a dipole electrode that reproduced the voltage time series of real conspecific pulses,but according to timestamp sequences previously recorded that could be chosen by the experimenter. Two independent variabl...

Forlim, Caroline Garcia

2012-01-01T23:59:59.000Z

389

EXISTENCE OF WEAK SOLUTIONS TO A CLASS OF NONSTRICTLY HYPERBOLIC CONSERVATION LAWS WITH NON-INTERACTING WAVES  

E-Print Network (OSTI)

Many applied problems resulting in hyperbolic conservation laws are nonstrictly hyperbolic. As of yet, there is no comprehensive theory to describe the solutions of these systems. In this paper, a proof of existence is given for a class of nonstrictly hyperbolic conservation laws using a proof technique first applied by Glimm to systems of strictly hyperbolic conservation laws. We show that Glimm’s scheme can be used to construct a subsequence converging to a weak solution. This paper necessarily departs from previous work in showing the existence of a convergent subsequence. A novel functional, shown to be equivalent to the total variation norm, is defined according to wave interactions. These interactions can be bounded without any assumptions of strict hyperbolicity. 1. Introduction. A conservation law is called nonstrictly hyperbolic if the eigenvalues of the

Anthony J. Kearsley; Andrea M. Reiff

2002-01-01T23:59:59.000Z

390

Weak-coupling analysis of the single-site large-N gauge theory coupled to adjoint fermions  

E-Print Network (OSTI)

We consider the leading-order expression at weak-coupling for a single-site large-N gauge theory coupled to adjoint fermions. We study the case of overlap and wilson fermions. We extend the theory to real values of the number of fermion flavors and restrict ourselves to asymptotically free theories. Using a four-dimensional density function for the distribution of the eigenvalues of the link variables, we show that it is possible to recover the infinite-volume continuum limit for a certain range of fermion flavors if we use fermions with a bare mass of zero. Our use of the four-dimensional density function is supported by a direct analysis of the lattice action.

Robert Lohmayer; Rajamani Narayanan

2013-05-06T23:59:59.000Z

391

Fermionic-bosonic couplings in a weakly deformed odd-mass nucleus, {sub 41}{sup 93}Nb  

SciTech Connect

A comprehensive level scheme of {sup 93}Nb below 2 MeV has been constructed from information obtained with the {sup 93}Nb(n,n{sup '{gamma}}) and the {sup 94}Zr(p,2n{gamma}{gamma}){sup 93}Nb 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 {pi}1g{sub 9/2} x {sub 40}{sup 92}Zr and {pi}2p{sub 1/2}{sup -1} x {sub 42}{sup 94}Mo configurations. A microscopic interpretation of such excitations is obtained from shell-model calculations, which use low-momentum effective interactions.

Orce, J. N. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 (Canada); Holt, J. D. [TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3 (Canada); Physics Division, Oak Ridge National Laboratory, P. O. Box 2008, Oak Ridge, Tennessee 37831 (United States); Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States); Linnemann, A.; Fransen, C.; Jolie, J.; Warr, N. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); McKay, C. J.; McEllistrem, M. T. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Kuo, T. T. S. [Department of Physics and Astronomy, Nuclear Structure Laboratory, SUNY, Stony Brook, New York 11794-3800 (United States); Lesher, S. R. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Department of Physics, University of Wisconsin-La Crosse, 1725 State Street, La Crosse, Wisconsin 54601 (United States); Pietralla, N. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); Institut fuer Kernphysik, Technische Universitaet Darmstadt, D-64289 Darmstadt (Germany); Werner, V. [Institut fuer Kernphysik, Universitaet zu Koeln, D-50937 Koeln (Germany); Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8120 (United States); Yates, S. W. [Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506-0055 (United States); Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506-0055 (United States)

2010-10-15T23:59:59.000Z

392

Universal breaking point asymptotic for energy spectrum of Riemann waves in weakly nonlinear non-dispersive media  

E-Print Network (OSTI)

In this Letter we study the form of the energy spectrum of Riemann waves in weakly nonlinear non-dispersive media. For quadratic and cubic nonlinearity we demonstrate that the deformation of an Riemann wave over time yields an exponential energy spectrum which turns into power law asymptotic with the slope being approximately -8/3 at the last stage of evolution before breaking. We argue, that this is the universal asymptotic behaviour of Riemann waves in any nonlinear non-dispersive medium at the point of breaking. The results reported in this Letter can be used in various non-dispersive media, e.g. magneto-hydro dynamics, physical oceanography, nonlinear acoustics.

Kartashova, Elena

2013-01-01T23:59:59.000Z

393

Enhanced collective focusing of intense neutralized ion beam pulses in the presence of weak solenoidal magnetic fields  

Science Conference Proceedings (OSTI)

The design of ion drivers for warm dense matter and high energy density physics applications and heavy ion fusion involves transverse focusing and longitudinal compression of intense ion beams to a small spot size on the target. To facilitate the process, the compression occurs in a long drift section filled with a dense background plasma, which neutralizes the intense beam self-fields. Typically, the ion bunch charge is better neutralized than its current, and as a result a net self-pinching (magnetic) force is produced. The self-pinching effect is of particular practical importance, and is used in various ion driver designs in order to control the transverse beam envelope. In the present work we demonstrate that this radial self-focusing force can be significantly enhanced if a weak (B {approx} 100 G) solenoidal magnetic field is applied inside the neutralized drift section, thus allowing for substantially improved transport. It is shown that in contrast to magnetic self-pinching, the enhanced collective self-focusing has a radial electric field component and occurs as a result of the overcompensation of the beam charge by plasma electrons, whereas the beam current becomes well-neutralized. As the beam leaves the neutralizing drift section, additional transverse focusing can be applied. For instance, in the neutralized drift compression experiments (NDCX) a strong (several Tesla) final focus solenoid is used for this purpose. In the present analysis we propose that the tight final focus in the NDCX experiments may possibly be achieved by using a much weaker (few hundred Gauss) magnetic lens, provided the ion beam carries an equal amount of co-moving neutralizing electrons from the preceding drift section into the lens. In this case the enhanced focusing is provided by the collective electron dynamics strongly affected by a weak applied magnetic field.

Dorf, Mikhail A. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Davidson, Ronald C.; Kaganovich, Igor D.; Startsev, Edward A. [Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

2012-05-15T23:59:59.000Z

394

ON DARK PEAKS AND MISSING MASS: A WEAK-LENSING MASS RECONSTRUCTION OF THE MERGING CLUSTER SYSTEM A520 ,  

SciTech Connect

Merging clusters of galaxies are unique in their power to directly probe and place limits on the self-interaction cross-section of dark matter. Detailed observations of several merging clusters have shown the intracluster gas to be displaced from the centroids of dark matter and galaxy density by ram pressure, while the latter components are spatially coincident, consistent with collisionless dark matter. This has been used to place upper limits on the dark matter particle self-interaction cross-section of order 1 cm{sup 2} g{sup -1}. The cluster A520 has been seen as a possible exception. We revisit A520 presenting new Hubble Space Telescope Advanced Camera for Surveys mosaic images and a Magellan image set. We perform a detailed weak-lensing analysis and show that the weak-lensing mass measurements and morphologies of the core galaxy-filled structures are mostly in good agreement with previous works. There is, however, one significant difference: We do not detect the previously claimed 'dark core' that contains excess mass with no significant galaxy overdensity at the location of the X-ray plasma. This peak has been suggested to be indicative of a large self-interaction cross-section for dark matter (at least {approx}5{sigma} larger than the upper limit of 0.7 cm{sup 2} g{sup -1} determined by observations of the Bullet Cluster). We find no such indication and instead find that the mass distribution of A520, after subtraction of the X-ray plasma mass, is in good agreement with the luminosity distribution of the cluster galaxies. We conclude that A520 shows no evidence to contradict the collisionless dark matter scenario.

Clowe, Douglas [Department of Physics and Astronomy, Ohio University, 251B Clippinger Labs, Athens, OH 45701 (United States); Markevitch, Maxim [NASA Goddard Space Flight Center, Code 662, 8800 Greenbelt Road, Greenbelt, MD 20706 (United States); Bradac, Marusa [Department of Physics, University of California, One Shields Avenue, Davis, CA 95616 (United States); Gonzalez, Anthony H.; Chung, Sun Mi [Department of Astronomy, University of Florida, 211 Bryant Space Science Center, Gainesville, FL 32611 (United States); Massey, Richard [Department of Physics, Durham University, South Road, Durham DH1 3LE (United Kingdom); Zaritsky, Dennis, E-mail: clowe@ohio.edu [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States)

2012-10-20T23:59:59.000Z

395

Weak Lensing Analysis of the z~0.8 cluster CL 0152-1357 with the Advanced Camera for Surveys  

E-Print Network (OSTI)

We present a weak lensing analysis of the X-ray luminous cluster CL 0152-1357 at z~0.84 using HST/ACS observations. The unparalleled resolution and sensitivity of ACS enable us to measure weakly distorted, faint background galaxies to the extent that the number density reaches ~175 arcmin^-2. The PSF of ACS has a complicated shape that also varies across the field. We construct a PSF model for ACS from an extensive investigation of 47 Tuc stars in a modestly crowded region. We show that this model PSF excellently describes the PSF variation pattern in the cluster observation when a slight adjustment of ellipticity is applied. The high number density of source galaxies and the accurate removal of the PSF effect through moment-based deconvolution allow us to restore the dark matter distribution of the cluster in great detail. The direct comparison of the mass map with the X-ray morphology from Chandra observations shows that the two peaks of intracluster medium traced by X-ray emission are lagging behind the corresponding dark matter clumps, indicative of an on-going merger. The overall mass profile of the cluster can be well described by an NFW profile with a scale radius of r_s =309+-45 kpc and a concentration parameter of c=3.7+-0.5. The mass estimates from the lensing analysis are consistent with those from X-ray and Sunyaev-Zeldovich analyses. The predicted velocity dispersion is also in good agreement with the spectroscopic measurement from VLT observations. In the adopted WMAP cosmology, the total projected mass and the mass-to-light ratio within 1 Mpc are estimated to be 4.92+-0.44 10^14 solar mass and 95+-8 solar mass/solar luminosity, respectively.

M. J. Jee; R. L. White; N. Benitez; H. C. Ford; J. P. Blakeslee; P. Rosati; R. Demarco; G. D. Illingworth

2004-09-13T23:59:59.000Z

396

Weak-link capacitor  

Science Conference Proceedings (OSTI)

A process for making a dielectric material where a precursor polymer selected from poly(phenylene vinylene) polyacetylene, poly(p-phenylene), poly(thienylene vinylene), poly(1,4-naphthylene vinylene), and poly(p-pyridine vinylene) is energized said by exposure by radiation or increase in temperature to a level sufficient to eliminate said leaving groups contained within the precursor polymer, thereby transforming the dielectric material into a conductive polymer. The leaving group in the precursor polymer can be a chloride, a bromide, an iodide, a fluoride, an ester, an xanthate, a nitrile, an amine, a nitro group, a carbonate, a dithiocarbamate, a sulfonium group, an oxonium group, an iodonium group, a pyridinium group, an ammonium group, a borate group, a borane group, a sulphinyl group, or a sulfonyl group.

Dirk, Shawn M. (Albuquerque, NM); Johnson, Ross S. (Albuquerque, NM); Wheeler, David R. (Albuquerque, NM); Bogart, Gregory R. (Corrales, NM)

2011-06-07T23:59:59.000Z

397

Weak-link capacitor  

DOE Patents (OSTI)

A process for making a dielectric material where a precursor polymer selected from poly(phenylene vinylene)polyacetylene, poly(p-phenylene), poly(thienylene vinylene), poly(1,4-naphthylene vinylene), and poly(p-pyridine vinylene) is energized said by exposure by radiation or increase in temperature to a level sufficient to eliminate said leaving groups contained within the precursor polymer, thereby transforming the dielectric material into a conductive polymer. The leaving group in the precursor polymer can be a chloride, a bromide, an iodide, a fluoride, an ester, an xanthate, a nitrile, an amine, a nitro group, a carbonate, a dithiocarbamate, a sulfonium group, an oxonium group, an iodonium group, a pyridinium group, an ammonium group, a borate group, a borane group, a sulphinyl group, or a sulfonyl group.

Dirk, Shawn M.; Johnson, Ross S.; Wheeler, David R.; Bogart, Gregory R.

2013-04-23T23:59:59.000Z

398

CWE - Common Weakness Enumeration  

Science Conference Proceedings (OSTI)

... 399, The software allows attackers to consume excess resources, such as memory exhaustion from memory leaks, CPU consumption from infinite ...

399

NN Weak Interaction Experiments  

Science Conference Proceedings (OSTI)

... The Spallation Neutron Source at ORNL ? $1.4B--1GeV protons at 2MW, ready now. ? Short (~1 usec) proton pulse– mainly for high TOF resolution ...

2009-07-13T23:59:59.000Z

400

Kinetic equilibrium of iron in the atmospheres of cool dwarf stars II. Weak Fe I lines in the solar spectrum  

E-Print Network (OSTI)

NLTE line formation calculations of FeI in the solar atmosphere are extended to include weak optical lines. Previously established atomic models are used to discriminate between different ways of treating collisional interaction processes. To derive a common solar FeI abundance from both strong and weak lines, fine-tuning of the microturbulence velocity parameter and the van-der- Waals damping constants is required. The solar FeI abundances based on all available f-values are dominated by the large scatter already found for the stronger lines. In particular the bulk of the data from the work of May et al. and O'Brian et al. is not adequate for accurate abundance work. Based on f-values measured by the Hannover and Oxford groups alone, the FeI LTE abundances are eps(FeI,Sun)=7.57 for the empirical and eps(FeI,Sun) = 7.48 ... 7.51 for the line-blanketed solar model. The solar Fe ionization equilibrium obtained for different atomic and atmospheric models rules out NLTE atomic models with a low efficiency of hydrogen collisions. At variance with Paper I, it is now in better agreement with laboratory FeII f-values for all types of line-blanketed models. Our final model assumptions consistent with a single unique solar Fe abundance eps(Fe,Sun) = 7.48 ... 7.51 calculated from NLTE line formation are (a) a line-blanketed solar model atmosphere, (b) an iron model atom with hydrogen collision rates 0.5 < S_H < 5 times the standard value to compensate for the large photoionization cross-sections, (c) a microturbulence velocity xi = 1.0 kms, (d) van-der-Waals damping parameters decreased by Delta(log C6) = -0.10...-0.15 as compared to Anstee & O'Mara's calculations, depending on S_H, (e) FeII f-values as published by Schnabel et al., and (f) FeI f-values published by the Hannover and Oxford groups.

T. Gehren; A. J. Korn; J. Shi

2001-10-29T23:59:59.000Z

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

A WEAK-LENSING AND NEAR-INFRARED STUDY OF A3192: DISASSEMBLING A RICHNESS CLASS 3 ABELL CLUSTER  

SciTech Connect

We present a joint gravitational lensing and near-infrared study of the galaxy cluster Abell 3192 (A3192) that has been associated both with galaxies at z = 0.168 and with the X-ray luminous cluster RXC J0358.8-2955 (RXC J0358) at z = 0.425. Weak-lensing analysis of our Hubble Space Telescope snapshot observation with the Advanced Camera for Surveys detects two mass over-densities separated by {approx}2 arcmin, one adjacent to the optical position of A3192 (4.4{sigma} significance) and the other adjacent to the X-ray position of RXC J0358 (6.2{sigma} significance). These mass peaks coincide with peaks in the K-band luminosity density of galaxies with near-infrared colors consistent with the red sequence at z = 0.168 and z 0.425, respectively. Moreover, the Bayesian evidence of parameterized mass models that include two cluster/group-scale halos centered on the respective mass peaks exceeds that of single-halo models by a factor of {>=}10. The total projected mass of each galaxy system within 250 kpc of the respective peaks is M{sub WL}(z = 0.168) {approx_equal} 3 Multiplication-Sign 10{sup 13} M{sub Sun} and M{sub WL}(z = 0.425) {approx_equal} 1.2 Multiplication-Sign 10{sup 14} M{sub Sun }, both with total mass-to-light ratios of M{sub WL}/L{sub K} {approx_equal} 20 M{sub Sun }/L{sub Sun }. The original Abell cluster therefore comprises two independent galaxy systems-a foreground group at z = 0.168 and RXC J0358 at z = 0.425. Our results demonstrate the power of combining X-ray, near-infrared, and weak-lensing observations to select massive clusters, place those clusters and interloper galaxy systems along the line of sight, and measure their masses. This combination will be invaluable to robust interpretation of future high-redshift cluster surveys, including eROSITA.

Hamilton-Morris, Victoria; Smith, Graham P.; Haines, C. P.; Sanderson, A. J. R. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Edge, A. C. [Institute of Computational Cosmology, Durham University, South Road, Durham DH1 3LE (United Kingdom); Egami, E. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Marshall, P. J. [Sub-department of Astrophysics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom); Targett, T. A., E-mail: vhh@star.sr.bham.ac.uk, E-mail: gps@star.sr.bham.ac.uk [SUPA, Institute for Astronomy, University of Edinburgh, Royal Observatory, Edinburgh EH9 3HJ (United Kingdom)

2012-04-01T23:59:59.000Z

402

Phenomenology of the neutral Higgs-boson in the Weinberg-Salam theory of the weak interactions  

SciTech Connect

The thesis discusses the phenomenological aspects of the Higgs-boson H in the Glashow-Weinberg-Salam SU(2) circle X U(1) Standard Model of the weak interactions. The structures of familiar nonabelian gauge theories and the fermion mass matrix, including some of the latest analyses of the Kobayashi-Maskawa (K.M.) generalization of the Cabbibo and Glashow-IIiopoulons-Maiani (GIM) formulations of universal are reviewed. Some of the properties (coupling, mass, etc.) of the Higgs-boson including comments on some previous suggested reactions and decay modes for the Higgs-boson production in the Standard Model are presented. After the background is reviewed, there is discussion of the research done in the University of Pittsburgh, which includes: a new possible production mechanism for the neutral Higgs-boson in the Standard Model; an empirical lower bound for the mass of the Higgs boson by examining the K/sup +/-/..--> pi../sup +/-///sup +///sup -/ decays; and an investigation of the strong radiative correction to the Q..-->..qH vertex which is just a Sudakov form factor.

Yu, H.L.

1982-01-01T23:59:59.000Z

403

EVALUATION OF ACTIVATION PRODUCTS IN REMAINING IN REMAINING K-, L- AND C-REACTOR STRUCTURES  

SciTech Connect

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

404

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 2007-002  

SciTech Connect

The 100-F-36 waste site is the location of the former 108-F Biological Laboratory. The building was closed in 1973, decontaminated, decommissioned, and eventually demolished in 1999. 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

2007-05-24T23:59:59.000Z

405

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

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

406

The Q{sub weak} Experiment at Jefferson Lab--A Search for New Physics at the TeV Scale  

Science Conference Proceedings (OSTI)

The Q{sub weak} collaboration will make the first precision determination of the proton's weak charge, Q{sub W}{sup P} = 1-4 sin{sup 2} {theta}{sub w}, from a measurement of the parity-violating asymmetry in elastic electron-proton scattering at very low momentum transfer. The results will determine the proton's weak charge with a 4% total error. The Standard Model makes a firm prediction of Q{sub W}{sup P}, based on the running of the weak mixing angle, sin{sup 2} {theta}{sub w}, from the Z{sup 0} pole down to low energies, corresponding to a 10{sigma} effect in this experiment. Any significant deviation of sin{sup 2} {theta}{sub w} from the Standard Model prediction at low Q{sup 2} would be a signal of new physics, wheras agreement would place new and significant constraints on possible Standard Model extensions at the TeV mass scale.

Pitt, Mark L. [Institute for Particle, Nuclear, and Astronomical Sciences and Department of Physics, Virginia Tech, Blacksburg, VA 24061 (United States)

2009-12-17T23:59:59.000Z

407

Kinetics and Mechanism of Hydroxyapatite Crystal Dissolution inWeak Acid Buffers Using the Rotating Disk Method  

E-Print Network (OSTI)

The dissolution rates of synthetic hydroxyapatite pellets under sink conditions were measured using the rotating disk method. The experimental data were analyzed by means of a physical model that yielded an ionic activity product of KHAP=aOCa2+ a6 PO43- a2011. = 1 X 10-124.5+1.0 that was found to govern the dissolution reaction. Also, a surface resistance factor of k ' equal to about 174 sec/cm was deduced from the data. A physical model for describing the dissolution rate behavior of human dental enamel and of hydroxyapatite in weak acid buffers under sink conditions was introduced by Higuchi and his collaborators.1-3 The model assumed that a hydroxyapatite phase governs the driving force of the dissolution and that the dissolution was essentially diffusion controlled in a diffusion layer adjacent to the enamel surface. The mathematical development also included the consideration of simultaneous diffusion and equilibriums of all species in the system. This early model enjoyed notable success.1-3 It was able to generally account for the effects of buffer types (pKa), buffer concentration, pH, and common ions (calcium and phosphate). Furthermore, an extension of this model showed that the influence of solution fluoride on the dissolution rate may be explained by assuming that a surface exchange of OH- by F- occurs rapidly during dissolution.4 For several reasons, it has been apparent that a more critical study of this model would be necessary. First, the value of KHAP This investigation was supported by USPHS Service

Maw-sheng Wu; William Higuchi; Jeffrey L. Fox; Michael Friedman

1975-01-01T23:59:59.000Z

408

Investigations of the potential functions of weakly bound diatomic molecules and laser-assisted excitive Penning ionization  

Science Conference Proceedings (OSTI)

Three variations on the Dunham series expansion function of the potential of a diatomic molecule are compared. The differences among these expansions lie in the choice of the expansion variable, lambda. The functional form of these variables are lambda/sub s/ = l-r/sub e//r for the Simon-Parr-Finlan version, lambda/sub T/ - 1-(r/sub e//r)/sup p/ for that of Thakkar, and lambda/sub H/ = 1-exp(-rho(r/r/sub e/-1) for that of Huffaker. A wide selection of molecular systems are examined. It is found that, for potentials in excess of thirty kcal/mole, the Huffaker expansion provides the best description of the three, extrapolating at large internuclear separation to a value within 10% of the true dissociation energy. For potentials that result from the interaction of excited states, all series expansions show poor behavior away from the equilibrium internuclear separation of the molecule. The series representation of the potentials of weakly bound molecules are examined in more detail. The ground states of BeAr/sup +/, HeNe/sup +/, NaAr, and Ar/sub 2/ and the excited states of HeNe+, NaNe, and NaAr are best described by the Thakkar expansion. Finally, the observation of laser-assisted excitive Penning ionization in a flowing afterglow is reported. The reaction Ar(/sup 3/P/sub 2/) + Ca + h nu ..-->.. Ar + Ca/sup +/(5p /sup 2/P/sub J/) + e/sup -/ occurs when the photon energy, h nu, is approximately equal to the energy difference between the metastable argon and one of the fine structure levels of the ion's doublet. By monitoring the cascade fluorescence of the above reaction and comparing it to the flourescence from the field-free process Ar(/sup 3/P/sub 2/) + Ca ..-->.. Ar + Ca/sup +/(4p /sup 2/P/sub J/) + e/sup -/ a surprisingly large cross section of 6.7 x 10/sup 3/ A/sup 2/ is estimated.

Goble, J.H. Jr.

1982-05-01T23:59:59.000Z

409

Data Plots of Run I - III Results from SLAC E-158: A precision Measurement of the Weak Mixing Angle in Moller Scattering  

DOE Data Explorer (OSTI)

Three physics runs were made in 2002 and 2003 by E-158. As a result, the E-158 Collaboration announced that it had made "the first observation of Parity Violation in electron-electron (Moller) scattering). This precise Parity Violation measurement gives the best determination of the electron's weak charge at low energy (low momentum transfer between interacting particles). E158's measurement tests the predicted running (or evolution) of this weak charge with energy, and searches for new phenomena at TeV energy scales (one thousand times the proton-mass energy scale).[Copied from the experiment's public home page at http://www-project slac.stanford.edu/3158/Default.htm] See also the E158 page for collaborators at http://www.slac.stanford.edu/exp/e158/. Both websites provide data and detailed information.

None

410

Phase-only shaped laser pulses in optimal control theory: Application to indirect photofragmentation dynamics in the weak-field limit  

SciTech Connect

We implement phase-only shaped laser pulses within quantum optimal control theory for laser-molecule interaction. This approach is applied to the indirect photofragmentation dynamics of NaI in the weak-field limit. It is shown that optimized phase-modulated pulses with a fixed frequency distribution can substantially modify transient dissociation probabilities as well as the momentum distribution associated with the relative motion of Na and I.

Shu, Chuan-Cun; Henriksen, Niels E. [Department of Chemistry, Building 207, Technical University of Denmark, DK-2800, Kongens Lyngby (Denmark)

2012-01-28T23:59:59.000Z

411

A Measurement of the Weak Charge of the Proton through Parity Violating Electron Scattering using the Qweak Apparatus: A 21% Result  

SciTech Connect

After a decade of preparations, the Qweak experiment at Jefferson Lab is making the first direct measurement of the weak charge of the proton, Q^p_W. This quantity is suppressed in the Standard Model making a good candidate for search for new physics beyond the SM at the TeV scale. Operationally, we measure a small (about -0.200 ppm) parity-violating asymmetry in elastic electron-proton scattering in integrating mode while flipping the helicity of the electrons 1000 times per second. Commissioning took place Fall 2010, and we finished taking data in early summer 2012. This dissertation is based on the data taken on an initial two weeks period (Wien0). It will provide an overview of the Qweak apparatus, description of the data acquisition and analysis software systems, and final analysis and results from the Wien0 data set. The result is a 16% measurement of the parity violating electron-proton scattering asymmetry, A = -0.2788 +/- 0.0348 (stat.) +/- 0.0290 (syst.) ppm at Q^2 = 0.0250 +/- 0.0006 (GeV)^2. From this a 21% measurement of the weak charge of the proton, Q_w^p(msr)= +0.0952 +/- 0.0155 (stat.) +/- 0.0131 (syst.) +/- 0.0015 (theory) is extracted. From this a 2% measurement of the weak mixing angle, sin^2theta_W(msr)= +0.2328 +/- 0.0039 (stat.) +/- 0.0033 (syst.) +/- 0.0004 (theory) and improved constraints on isoscalar/isovector effective coupling constants of the weak neutral hadronic currents are extracted. These results deviate from the Standard Model by one standard deviation. The Wien0 results are a proof of principle of the Qweak data analysis and a highlight of the road ahead for obtaining full results.

Beminiwattha, Rakitha [JLAB, Ohio U.

2013-08-01T23:59:59.000Z

412

Low energy weak interactions and decays. [Partial summary of presentations at XXth International Conf. on High Energy Physics, Madison, Wisc. , July 17-23, 1980  

SciTech Connect

Results presented during sessions B5 to 7 at the XXth International Conference on High Energy Physics (University of Wisconsin, Madison, July 17 to 23, 1980) are discussed. Essentially all the material presented is summarized. The sessions covered various aspects of low-energy weak interactions. The following topics are addressed: CP-invariance violation, high-statistics study of ..lambda.. beta decay, parity violation in proton-nucleus scattering at 6 GeV/c, new results on the tau, charm particle decays (direct lifetime determinations, semileptonic branching ratios, comparison of semileptonic rate with theoretical expectations, further study of charm meson decays, F decays), and neutrino oscillations. 6 figures, 9 tables. (RWR)

Trilling, G.H.

1980-09-01T23:59:59.000Z

413

JOINT ANALYSIS OF CLUSTER OBSERVATIONS. II. CHANDRA/XMM-NEWTON X-RAY AND WEAK LENSING SCALING RELATIONS FOR A SAMPLE OF 50 RICH CLUSTERS OF GALAXIES  

SciTech Connect

We present a study of multiwavelength X-ray and weak lensing scaling relations for a sample of 50 clusters of galaxies. Our analysis combines Chandra and XMM-Newton data using an energy-dependent cross-calibration. After considering a number of scaling relations, we find that gas mass is the most robust estimator of weak lensing mass, yielding 15% {+-} 6% intrinsic scatter at r{sub 500}{sup WL} (the pseudo-pressure Y{sub X} yields a consistent scatter of 22% {+-} 5%). The scatter does not change when measured within a fixed physical radius of 1 Mpc. Clusters with small brightest cluster galaxy (BCG) to X-ray peak offsets constitute a very regular population whose members have the same gas mass fractions and whose even smaller (<10%) deviations from regularity can be ascribed to line of sight geometrical effects alone. Cool-core clusters, while a somewhat different population, also show the same (<10%) scatter in the gas mass-lensing mass relation. There is a good correlation and a hint of bimodality in the plane defined by BCG offset and central entropy (or central cooling time). The pseudo-pressure Y{sub X} does not discriminate between the more relaxed and less relaxed populations, making it perhaps the more even-handed mass proxy for surveys. Overall, hydrostatic masses underestimate weak lensing masses by 10% on the average at r{sub 500}{sup WL}; but cool-core clusters are consistent with no bias, while non-cool-core clusters have a large and constant 15%-20% bias between r{sub 2500}{sup WL} and r{sub 500}{sup WL}, in agreement with N-body simulations incorporating unthermalized gas. For non-cool-core clusters, the bias correlates well with BCG ellipticity. We also examine centroid shift variance and power ratios to quantify substructure; these quantities do not correlate with residuals in the scaling relations. Individual clusters have for the most part forgotten the source of their departures from self-similarity.

Mahdavi, Andisheh [Department of Physics and Astronomy, San Francisco State University, San Francisco, CA 94131 (United States); Hoekstra, Henk [Leiden Observatory, Leiden University, Niels Bohrweg 2, NL-2333 CA Leiden (Netherlands); Babul, Arif; Bildfell, Chris [Department of Physics and Astronomy, University of Victoria, Victoria, BC V8W 3P6 (Canada); Jeltema, Tesla [Santa Cruz Institute for Particle Physics, UC Santa Cruz, 1156 High Street, Santa Cruz, CA 95064 (United States); Henry, J. Patrick [Institute for Astronomy, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)

2013-04-20T23:59:59.000Z

414

Two-dimensional nonlinear finite element analysis of well damage due to reservoir compaction, well-to-well interactions, and localization on weak layers  

Science Conference Proceedings (OSTI)

In this paper the authors present the results of a coupled nonlinear finite element geomechanics model for reservoir compaction and well-to-well interactions for the high-porosity, low strength diatomite reservoirs of the Belridge field near Bakersfield, California. They show that well damage and failures can occur under the action of two distinct mechanisms: shear deformations induced by pore compaction, and subsidence, and shear deformations due to well-to-well interactions during production or water injection. They show such casting damage or failure can be localized to weak layers that slide or slip under shear due to subsidence. The magnitude of shear displacements and surface subsidence agree with field observations.

Hilbert, L.B. Jr. [Univ. of California, Berkeley, CA (United States); Fredrich, J.T. [Sandia National Labs., Albuquerque, NM (United States); Bruno, M.S. [Terralog Technologies USA, Inc., Arcadia, CA (United States); Deitrick, G.L.; Rouffignac, E.P. de [Shell Exploration and Production Co., Houston, TX (United States)

1996-05-01T23:59:59.000Z

415

Verification test problems for the calculation of probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.  

SciTech Connect

Four verification test problems are presented for checking the conceptual development and computational implementation of calculations to determine the probability of loss of assured safety (PLOAS) in temperature-dependent systems with multiple weak links (WLs) and strong links (SLs). The problems are designed to test results obtained with the following definitions of loss of assured safety: (1) Failure of all SLs before failure of any WL, (2) Failure of any SL before failure of any WL, (3) Failure of all SLs before failure of all WLs, and (4) Failure of any SL before failure of all WLs. The test problems are based on assuming the same failure properties for all links, which results in problems that have the desirable properties of fully exercising the numerical integration procedures required in the evaluation of PLOAS and also possessing simple algebraic representations for PLOAS that can be used for verification of the analysis.

Johnson, Jay Dean (ProStat, Mesa, AZ); Oberkampf, William Louis; Helton, Jon Craig (Arizona State University, Tempe, AZ)

2006-06-01T23:59:59.000Z

416

Structure of Low-Energy Collective $0^{-}$-States in Doubly Magic Nuclei and Matrix Elements of the P-odd and P- and T-odd Weak Interaction  

E-Print Network (OSTI)

The structure of the collective low-energy $J^{\\pi}=0^{-}$ (T=0 and T=1) modes is studied for a doubly magic nucleus in a schematic analytic model of RPA. The $0^{-}$ phonon states ($T= 0,1$) lie at energies $E_{T=0}(0^{-}) \\alt \\omega$ and $E_{T=1}(0^{-}) > \\omega$, where $\\omega$ is the oscillator frequency. The matrix elements of P-odd and P- and T-odd weak one-body potentials connecting the ground state to these $0^{-}$-states, $W_{coll}$, are enhanced by the factor $\\sim 2 (\\frac{\\omega}{E})^{1/2}A^{1/3} \\sim 10$ as compared to the single-particle value $w_{sp}$ what can result in values $|W_{coll}| \\sim 20-30 eV$ if standard values of DDH parameters are used for $w_{sp}$. Similar enhancement arises in the P- and T-odd case.

O. K. Vorov; N. Auerbach; V. V. Flambaum

1996-03-31T23:59:59.000Z

417

Application of the Bogolyubov's theory of weakly non-ideal Bose gas on the A+A, A+B, B+B reaction-diffusion system  

E-Print Network (OSTI)

Theoretical methods for dealing with diffusion-controlled reactions inevitably rely on some kind of approximation and to find the one that works on a particular problem is not always easy. In here the approximation used by Bogolyubov to study weakly non-ideal Bose gas, to be refereed to as weakly non-ideal Bose gas approximation (WBGA), is applied in the analysis of of the three reaction-diffusion models (i) A+A->0, (ii) A+B->0 and (iii) A+A,B+B,A+B->0 (the ABBA model). The two types of WBGA are considered, the simpler WBGA-I and more complicated WBGA-II. All models are defined on the lattice to facilitate comparison with computer experiment (simulation). It is found that the WBGA describes A+B reaction well, it reproduces correct d/4 density decay exponent. However, it fails in the case of the A+A reaction and the ABBA model. (To cure deficiency of WBGA in dealing with A+A model the hybrid of WBGA and Kirkwood superposition approximation is suggested.) It is shown that the WBGA-I is identical to the dressed tree calculation suggested by Lee in J. Phys. A 27, 2633 (1994), and that the dressed tree calculation does not lead to the d/2 density decay exponent when applied to the A+A reaction, as normally believed, but it predicts d/4 decay exponent. Last, the usage of the small n_0 approximation suggested by Mattis and Glasser in Rev. Mod. Phys. 70, 979 (1998) is questioned if used beyond A+B reaction-diffusion model.

Zoran Konkoli

2003-05-07T23:59:59.000Z

418

Conservation Laws in Weak Interactions  

DOE R&D Accomplishments (OSTI)

Notes are presented on four lectures given at Harvard University in March 1957 on elementary particle physics, the theta-tau problem, validity of parity conservation, tests for invariance under P, C, and T, and the two-component theory of the neutrino. (W.D.M.)

Lee, T. D.

1957-03-00T23:59:59.000Z

419

Common Weakness Scoring System (CWSS)  

Science Conference Proceedings (OSTI)

... Product for enabling a large community of people to chat, exchange messages or pictures, and share interests, eg Facebook, MySpace, Twitter ...

2012-10-26T23:59:59.000Z

420

Coal market fundamentals changed, yet spot prices remained stable ...  

U.S. Energy Information Administration (EIA)

Financial market analysis and financial data for major energy companies. ... Source: U.S. Energy Information Administration, Weekly Coal Production, ...

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421

Removal of Last Remaining HEU from Vietnam - Time Lapse Video...  

NLE Websites -- All DOE Office Websites (Extended Search)

(MOST) and the Russian Federation successfully removed 11 kilograms of highly enriched uranium (HEU) from the Dalat Nuclear Research Institute. This is the eleventh country...

422

Failure Analysis and Remaining Life Assessment of Methanol ...  

Science Conference Proceedings (OSTI)

Analysis of a Bucketwheel Stacker Reclaimer Structural Failure · Analysis of Glass Breakage · Analysis of Sealed, Integrated, Automotive Wheel Bearings.

423

Miguel Angel Perez Angon: what is that really remains?  

Science Conference Proceedings (OSTI)

Laudatio in honor of Dr. Miguel Angel Perez Angon, co-recipient of the 2008 Medal of the Division of Particles and Fields of the Mexican Physical Society.

Contreras, J. G. [Departamento de Fisica Aplicada CINVESTAV-IPN, Unidad Merida, A. P. 73 Cordemex, 97310 Merida, Yucatan (Mexico)

2009-04-20T23:59:59.000Z

424

Investment in generation is heavy, but important needs remain  

Science Conference Proceedings (OSTI)

Forecasting the direction of the US electric power industry for 2007, much less the distant future, is like defining a velocity vector; doing so requires a direction and speed to delineate progress. In this special report, the paper looks at current industry indicators and draws conclusions based on more than 100 years of experience. To borrow verbatim the title of basketball legend Charles Barkely's book 'I may be wrong but I doubt it'. The forecast takes into consideration USDOE's National Electric Transmission Congestion Study (August 2006),a summary of industry data prepared by Industrial Info Resources (IIR) and NERC's 2006 Long-Term Reliability Assessment (October 2006). It also reports opinions of industry specialists. 3 figs., 4 tabs.

Maize, K.

2007-01-15T23:59:59.000Z

425

A study investigating copper smelting remains from San Bartolo, Chile  

E-Print Network (OSTI)

Introduction: Research on the metallurgy of archaeological artifacts has focused primarily on the examination of objects to reveal their design, their composition, the properties of the material people selected to achieve ...

Alunni, Antonella I

2006-01-01T23:59:59.000Z

426

US, International Partners Remove Last Remaining HEU from Vietnam...  

NLE Websites -- All DOE Office Websites (Extended Search)

and eliminating weapons-usable nuclear materials," said U.S. Secretary of Energy Ernest Moniz. "Today, with the complete removal of all highly enriched uranium from Vietnam, we can...

427

THE SUPPLY OF ENERGY TO fuel economic development remains a  

E-Print Network (OSTI)

of the impact that new hydro power plants or fossil-burning thermal generators have. Private investors leading in power plant technology is the aim of achieving high thermal efficiencies together with low emission and its dialogue with the environment 18 IEEE power & energy magazine july/august 20061540

Catholic University of Chile (Universidad Católica de Chile)

428

Lack of an energy policy remains a major barrier  

Science Conference Proceedings (OSTI)

This paper reports that the war with Iraq provided a new dimension to the ongoing oil industry struggle to cope with oppressive government action and regulation. Coming as it did just before the administration was to announce guidelines for a long-awaited National Energy Strategy (NES), the war created a renewed and dramatic focus on the national energy security question. Now, numerous congressmen, senators and administration leaders are taking a fresh look at how the U.S. can extricate itself from excessive dependence on Middle East oil imports. For example, the planned free-trade agreement with Mexico could figure prominently in an alliance that would bring much more Mexican oil to the U.S. Meanwhile, the wild card is proposals to open up U.S. drilling offshore and in the Arctic National Wildlife Region (ANWR). Prior to hostilities, Middle East tensions brought on significant increases in the price of oil, and with it a large gain in oil company profits for fourth-quarter 1990. Result: talk in Congress of a new windfall profits tax.

Owen, D.

1991-03-01T23:59:59.000Z

429

Remaining uncertainties in the kinetic mechanism of hydrogen combustion  

SciTech Connect

An analysis of the performance of an updated hydrogen combustion mechanism is presented. Particular attention was paid to different channels of reaction between H atoms and HO{sub 2} radicals, to pressure dependence of the recombination of HO{sub 2} radicals, and to the anomalous rate constant of reaction between OH and HO{sub 2} radicals. The contemporary choice of the reaction rate constants is presented with the emphasis on their uncertainties. Then the predictions of ignition, oxidation, flame burning velocities, and flame structure of hydrogen-oxygen-inert mixtures are shown. The modeling range covers ignition experiments from 950 to 2700 K and from subatmospheric pressures up to 87 atm; hydrogen oxidation in a flow reactor at temperatures around 900 K from 0.3 up to 15.7 atm; flame burning velocities in hydrogen-oxygen-inert mixtures from 0.35 up to 4 atm; and hydrogen flame structure at 1 and 10 atm. Comparison of the modeling and experiments is discussed in terms of the range of applicability of the present detailed mechanism. The necessity for analysis of the mechanism to have an exhaustive list of reactions is emphasized. (author)

Konnov, Alexander A. [Department of Mechanical Engineering, Vrije Universiteit Brussel, Brussels (Belgium)

2008-03-15T23:59:59.000Z

430

Marine construction is on the rise but prices remain low  

SciTech Connect

The offshore construction industry is coming out of the worldwide depression. The North Sea is coming back, the Gulf Mexico is making a comeback, there is work offshore India, development offshore California is helping, and Pemex is again ordering platforms. The best market in the world is still the Gulf of Mexico, and as the rig count increases, construction contractors will begin to feel the upswing. Derrick barges are finding a moderate amount of work; however, the rates are still depressed. The new source of business for the Gulf of Mexico will be oil discoveries in water depths of 1000-1500 ft. The fabrication of these platforms will be limited to the larger fabricators, but the structures are of such size they will take up capacity, and this will help the smaller fabricators as well.

Crews, R.N.

1984-12-01T23:59:59.000Z

431

New technique determines the number of fat cells remains constant...  

NLE Websites -- All DOE Office Websites (Extended Search)

in Sweden; Humboldt University Berlin, Foundation of Research and Technology in Greece; Karolinska University Hospital; and Stockholm University - applied carbon dating to...

432

Search for a Light Higgs Boson Decaying to Long-Lived Weakly Interacting Particles in Proton-Proton Collisions at root s=7 TeV with the ATLAS Detector  

Science Conference Proceedings (OSTI)

A search for the decay of a light Higgs boson (120-140 GeV) to a pair of weakly interacting, long-lived particles in 1.94 fb{sup -1} of proton-proton collisions at {radical}s = 7 TeV recorded in 2011 by the ATLAS detector is presented. The search strategy requires that both long-lived particles decay inside the muon spectrometer. No excess of events is observed above the expected background and limits on the Higgs boson production times branching ratio to weakly interacting, long-lived particles are derived as a function of the particle proper decay length.

Aad G.; Abbott, B.; Abdallah, J.; Abdelalim, A. A.; Abdesselam, A.; Abdinov, O.; Abi, B.; Abolins, M.; AbouZeid, O. S.; Abramowicz, H.; Abreu, H.; Acerbi, E.; Acharya, B. S.; Adamczyk, L.; Adams, D. L.; Addy, T. N.; Adelman, J.; Aderholz, M.; Adomeit, S.; et al.

2012-06-19T23:59:59.000Z

433

Counterexample to "Sufficient Conditions for uniqueness of the Weak Value" by J. Dressel and A. N. Jordan, arXiv:1106.1871v1  

E-Print Network (OSTI)

The abstract of "Contextual Values of Observables in Quantum Measurements" by J. Dressel, S. Agarwal, and A. N. Jordan [Phys. Rev. Lett. 104 240401 (2010)] (called DAJ below), states: "We introduce contextual values as a generalization of the eigenvalues of an observable that takes into account both the system observable and a general measurement procedure. This technique leads to a natural definition of a general conditioned average that converges uniquely to the quantum weak value in the minimal disturbance limit." A counterexample to the claim of the last sentence was presented in Version 1. Subsequently Dressel and Jordan placed in the arXiv the paper of the title (called DJ below) which attempts to prove the claim of DAJ quoted above under stronger hypotheses than given in DAJ, hypotheses which the counterexample does not satisfy. The present work (Version 6) presents a new counterexample to this revised claim of DJ. A brief introduction to "contextual values" is included. Also included is a critical analysis of DJ.

Stephen Parrott

2011-05-20T23:59:59.000Z

434

Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron  

E-Print Network (OSTI)

We combine searches by the CDF and D0 Collaborations for the associated production of a Higgs boson with a W or Z boson and subsequent decay of the Higgs boson to a bottom-antibottom quark pair. The data, originating from Fermilab Tevatron p-pbar collisions at sqrt{s}=1.96 TeV, correspond to integrated luminosities of up to 9.7 fb^-1. The searches are conducted for a Higgs boson with mass in the range 100-150 GeV/c^2. We observe an excess of events in the data compared with the background predictions, which is most significant in the mass range between 120 and 135 GeV/c^2. The largest local significance is 3.3 standard deviations, corresponding to a global significance of 3.1 standard deviations. We interpret this as evidence for the presence of a new particle consistent with the standard model Higgs boson, which is produced in association with a weak vector boson and decays to a bottom-antibottom quark pair.

CDF Collaboration; D0 Collaboration

2012-07-27T23:59:59.000Z

435

NONRELATIVISTIC COLLISIONLESS SHOCKS IN WEAKLY MAGNETIZED ELECTRON-ION PLASMAS: TWO-DIMENSIONAL PARTICLE-IN-CELL SIMULATION OF PERPENDICULAR SHOCK  

Science Conference Proceedings (OSTI)

A two-dimensional particle-in-cell simulation is performed to investigate weakly magnetized perpendicular shocks with a magnetization parameter of {sigma} = 6 x 10{sup -5}, which is equivalent to a high Alfven Mach number M{sub A} of {approx}130. It is shown that current filaments form in the foot region of the shock due to the ion-beam-Weibel instability (or the ion filamentation instability) and that they generate a strong magnetic field there. In the downstream region, these current filaments also generate a tangled magnetic field that is typically 15 times stronger than the upstream magnetic field. The thermal energies of electrons and ions in the downstream region are not in equipartition and their temperature ratio is T{sub e}/T{sub i} {approx} 0.3-0.4. Efficient electron acceleration was not observed in our simulation, although a fraction of the ions are accelerated slightly on reflection at the shock. The simulation results agree very well with the Rankine-Hugoniot relations. It is also shown that electrons and ions are heated in the foot region by the Buneman instability (for electrons) and the ion-acoustic instability (for both electrons and ions). However, the growth rate of the Buneman instability is significantly reduced due to the relatively high temperature of the reflected ions. For the same reason, ion-ion streaming instability does not grow in the foot region.

Kato, Tsunehiko N.; Takabe, Hideaki, E-mail: kato-t@ile.osaka-u.ac.j [Institute of Laser Engineering, Osaka University, 2-6 Yamada-oka, Suita, Osaka 565-0871 (Japan)

2010-09-20T23:59:59.000Z

436

Evidence for a particle produced in association with weak bosons and decaying to a bottom-antibottom quark pair in Higgs boson searches at the Tevatron  

Science Conference Proceedings (OSTI)

We combine searches by the CDF and D0 Collaborations for the associated production of a Higgs boson with a W or Z boson and subsequent decay of the Higgs boson to a bottom-antibottom quark pair. The data, originating from Fermilab Tevatron p{bar p} collisions at {radical}s=1.96 TeV, correspond to integrated luminosities of up to 9.7 fb{sup -1}. The searches are conducted for a Higgs boson with mass in the range 100-150 GeV/c{sup 2}. We observe an excess of events in the data compared with the background predictions, which is most significant in the mass range between 120 and 135 GeV/c{sup 2}. The largest local significance is 3.3 standard deviations, corresponding to a global significance of 3.1 standard deviations. We interpret this as evidence for the presence of a new particle consistent with the standard model Higgs boson, which is produced in association with a weak vector boson and decays to a bottom-antibottom quark pair.

Aaltonen, T.; /Helsinki Inst. of Phys.; Abazov, V.M.; /Dubna, JINR; Abbott, B.; /Oklahoma U.; Acharya, B.S.; /Tata Inst.; Adams, M.; /Illinois U., Chicago; Adams, T.; /Florida State U.; Alexeev, G.D.; /Dubna, JINR; Alkhazov, G.; /St. Petersburg, INP; Alton, A.; /Michigan U.; Alvarez Gonzalez, B.; /Oviedo U. /Cantabria Inst. of Phys.; Alverson, G.; /Northeastern U. /INFN, Padua

2012-07-01T23:59:59.000Z

437

Effect of delayed link failure on probability of loss of assured safety in temperature-dependent systems with multiple weak and strong links.  

SciTech Connect

Weak link (WL)/strong link (SL) systems constitute important parts of the overall operational design of high consequence systems, with the SL system designed to permit operation of the system only under intended conditions and the WL system designed to prevent the unintended operation of the system under accident conditions. Degradation of the system under accident conditions into a state in which the WLs have not deactivated the system and the SLs have failed in the sense that they are in a configuration that could permit operation of the system is referred to as loss of assured safety. The probability of such degradation conditional on a specific set of accident conditions is referred to as probability of loss of assured safety (PLOAS). Previous work has developed computational procedures for the calculation of PLOAS under fire conditions for a system involving multiple WLs and SLs and with the assumption that a link fails instantly when it reaches its failure temperature. Extensions of these procedures are obtained for systems in which there is a temperature-dependent delay between the time at which a link reaches its failure temperature and the time at which that link actually fails.

Johnson, J. D. (ProStat, Mesa, AZ); Oberkampf, William Louis; Helton, Jon Craig (Arizona State University, Tempe, AZ)

2007-05-01T23:59:59.000Z

438

Correlated behavior of conductance and phase rigidity in the transition from the weak-coupling to the strong-coupling regime  

E-Print Network (OSTI)

We study the transmission through different small systems as a function of the coupling strength $v$ to the two attached leads. The leads are identical with only one propagating mode $\\xi^E_C$ in each of them. Besides the conductance $G$, we calculate the phase rigidity $\\rho$ of the scattering wave function $\\Psi^E_C$ in the interior of the system. Most interesting results are obtained in the regime of strongly overlapping resonance states where the crossover from staying to traveling modes takes place. The crossover is characterized by collective effects. Here, the conductance is plateau-like enhanced in some energy regions of finite length while corridors with zero transmission (total reflection) appear in other energy regions. This transmission picture depends only weakly on the spectrum of the closed system. It is caused by the alignment of some resonance states of the system with the propagating modes $\\xi^E_C$ in the leads. The alignment of resonance states takes place stepwise by resonance trapping, i...

Bulgakov, E N; Sadreev, A F

2007-01-01T23:59:59.000Z

439

Prospects for Observing the Standard Model Higgs Boson Decaying into b\\bar{b} Final States Produced in Weak Boson Fusion with an Associated Photon at the LHC  

E-Print Network (OSTI)

One of the primary goals of the Large Hadron Collider is to understand the electroweak symmetry breaking mechanism. In the Standard Model, electroweak symmetry breaking is described by the Higgs mechanism which includes a scalar Higgs boson. Electroweak measurements constrain the Standard Model Higgs boson mass to be in the 114.4 to 157 GeV/c^2 range. Within this mass window, the Higgs predominantly decays into two b-quarks. As such, we investigate the prospect of observing the Standard Model Higgs decaying to b\\bar{b} produced in weak-boson-fusion with an associated central photon. An isolated, high pt, central photon trigger is expected to be available at the ATLAS and CMS experiments. In this study, we investigated the effects originating from showering, hadronization, the underlying event model, and jet performance including b-jet calibration on the sensitivity of this channel. We found that the choice of Monte Carlo and Monte Carlo tune has a large effect on the efficacy of the central jet veto and consequently the signal significance. A signal significance of about 1.86 can be achieved for m(Higgs)=115 GeV/c^2 with 100 1/fb of integrated luminosity which correspond to one year at design luminosity at 14 TeV pp collisions.

D. M. Asner; M. Cunningham; S. Dejong; K. Randrianarivony; C. Santamarina; M. Schram

2010-04-04T23:59:59.000Z

440

Cross-Correlation of SDSS DR7 Quasars and DR10 BOSS Galaxies: The Weak Luminosity Dependence of Quasar Clustering at z~0.5  

E-Print Network (OSTI)

We present the measurement of the two-point cross-correlation function (CCF) of 8,198 Sloan Digital Sky Survey (SDSS) Data Release 7 (DR7) quasars and 349,608 DR10 CMASS galaxies from the Baryonic Oscillation Spectroscopic Survey (BOSS) at redshift ~0.5 (0.3=0.53 from the CCF measurements. This linear bias corresponds to a characteristic host halo mass of ~4x10^12 M_sun/h, compared to ~10^13 M_sun/h characteristic host halo mass for CMASS galaxies. We divide the quasar sample in luminosity and constrain the luminosity dependence of quasar bias to be db_Q/dlogL=0.20+-0.34 or 0.11+-0.32 (depending on different luminosity divisions) for quasar luminosities -23.5>M_i(z=2)>-25.5, implying a weak luminosity dependence of quasar clustering for the bright end of the quasar population at ~0.5. We compare our measurements with theoretical predictions, Halo Occupation Distribution (HOD) models and mock catalogs. These comparisons suggest quasars reside in a broad range of host halos, and the host halo mass distributions...

Shen, Yue; White, Martin; Zheng, Zheng; Myers, Adam D; Guo, Hong; Kirkpatrick, Jessica A; Padmanabhan, Nikhil; Parejko, John K; Ross, Nicholas P; Schlegel, David J; Schneider, Donald P; Streblyanska, Alina; Swanson, Molly E C; Zehavi, Idit; Pan, Kaike; Bizyaev, Dmitry; Brewington, Howard; Ebelke, Garrett; Malanushenko, Viktor; Malanushenko, Elena; Oravetz, Daniel; Simmons, Audrey; Snedden, Stephanie

2012-01-01T23:59:59.000Z

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.


441

Search for a Light Higgs Boson Decaying to Long-Lived Weakly Interacting Particles in Proton-Proton Collisions at ?s=7??TeV with the ATLAS Detector  

E-Print Network (OSTI)

A search for the decay of a light Higgs boson (120–140 GeV) to a pair of weakly interacting, long-lived particles in 1.94??fb-1 of proton-proton collisions at ?s=7??TeV recorded in 2011 by the ATLAS detector is presented. ...

Taylor, Frank E.

442

Subject Areas: Particle Physics A Viewpoint on: Evidence for a Particle Produced in Association with Weak Bosons and Decaying to a Bottom- Antibottom Quark Pair in Higgs Boson Searches at the Tevatron  

E-Print Network (OSTI)

Two collaborations at the Tevatron have combined data from their searches for the Higgs boson and report evidence of a new particle decaying into heavy quark pairs. This could be the first experimental evidence that the same mechanism that gives mass to the carriers of the weak force also underlies the mass of quarks.

Albert De Roeck

2012-01-01T23:59:59.000Z

443

Influence of a Weak Field of Pulsed DC Electricity on the Behavior and Incidence of Injury in Adult Steelhead and Pacific Lamprey, Final Report.  

DOE Green Energy (OSTI)

Predation by pinnipeds, such as California sea lions Zalophus californianus, Pacific harbor seals Phoca vitulina, and Stellar sea lions Eumetopias jubatus on adult Pacific salmon Oncorhynchus spp in the lower Columbia River has become a serious concern for fishery managers trying to conserve and restore runs of threatened and endangered fish. As a result, Smith-Root, Incorporated (SRI; Vancouver, Washington), manufacturers of electrofishing and closely-related equipment, proposed a project to evaluate the potential of an electrical barrier to deter marine mammals and reduce the amount of predation on adult salmonids (SRI 2007). The objectives of their work were to develop, deploy, and evaluate a passive, integrated sonar and electric barrier that would selectively inhibit the upstream movements of marine mammals and reduce predation, but would not injure pinnipeds or impact anadromous fish migrations. However, before such a device could be deployed in the field, concerns by regional fishery managers about the potential effects of such a device on the migratory behavior of Pacific salmon, steelhead O. mykiss, Pacific lampreys Entoshpenus tridentata, and white sturgeon Acipenser transmontanus, needed to be addressed. In this report, we describe the results of laboratory research designed to evaluate the effects of prototype electric barriers on adult steelhead and Pacific lampreys. The effects of electricity on fish have been widely studied and include injury or death (e.g., Sharber and Carothers 1988; Dwyer et al. 2001; Snyder 2003), physiological dysfunction (e.g., Schreck et al. 1976; Mesa and Schreck 1989), and altered behavior (Mesa and Schreck 1989). Much of this work was done to investigate the effects of electrofishing on fish in the wild. Because electrofishing operations would always use more severe electrical settings than those proposed for the pinniped barrier, results from these studies are probably not relevant to the work proposed by SRI. Field electrofishing operations typically use high voltage and amperage settings and a variety of waveforms, pulse widths (PW), and pulse frequencies (PF), depending on conditions and target species. For example, when backpack electrofishing for trout in a small stream, one might use settings such as 500 V pulsed DC, a PW of 1 ms, and a PF of 60 Hz. In contrast, the electrical barrier proposed by SRI will produce electrical conditions significantly lower than those used in electrofishing, particularly for PW and PF (e.g., PW ranging from 300-1,000 {micro}s and PF from 2-3 Hz). Further, voltage gradients (in V/cm) are predicted to be lower in the electric barrier than those produced during typical electrofishing. Although the relatively weak, pulsed DC electric fields to be produced by the barrier may be effective at deterring pinnipeds, little, if anything, is known about the effects of such low intensity electrical fields on fish behavior. For this research, we evaluated the effects of weak, pulsed DC electric currents on the behavior of adult steelhead and Pacific lamprey and the incidence of injury in steelhead only. In a series of laboratory experiments, we: (1) documented the rate of passage of fish over miniature, prototype electric barriers when they were on and off; (2) determined some electric thresholds beyond which fish would not pass over the barrier; and (3) assessed the incidence and severity of injury in steelhead exposed to relatively severe electrical conditions. The results of this study should be useful for making decisions about whether to install electrical barriers in the lower Columbia River, or elsewhere, to reduce predation on upstream migrating salmonids and other fishes by marine pinnipeds.

Mesa, Matthew

2009-02-13T23:59:59.000Z

444

Two-dimensional weak anti-localization in Bi{sub 2}Te{sub 3} thin film grown on Si(111)-(7 Multiplication-Sign 7) surface by molecular beam epitaxy  

SciTech Connect

We report on low temperature transport studies of Bi{sub 2}Te{sub 3} topological insulator thin films grown on Si(111)-(7 Multiplication-Sign 7) surface by molecular beam epitaxy. A sharp increase in the magnetoresistance with magnetic field at low temperature indicates the existence of weak anti-localization. The measured weak anti-localization effect agrees well with the Hikami-Larkin-Nagaoka model, and the extracted phase coherence length shows a power-law dependence with temperature indicating the existence of a two-dimensional system. An insulating ground state has also been observed at low temperature showing a logarithmic divergence of the resistance that appears to be the influence of electron-electron interaction in a two-dimensional system.

Roy, Anupam; Guchhait, Samaresh; Sonde, Sushant; Dey, Rik; Pramanik, Tanmoy; Rai, Amritesh; Movva, Hema C. P.; Banerjee, Sanjay K. [Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758 (United States)] [Microelectronics Research Center, The University of Texas at Austin, Austin, Texas 78758 (United States); Colombo, Luigi [Texas Instruments, 12500 TI Boulevard, Dallas, Texas 75266 (United States)] [Texas Instruments, 12500 TI Boulevard, Dallas, Texas 75266 (United States)

2013-04-22T23:59:59.000Z

445

ii The upfront carbon debt of bioenergy Contents Executive Summary........................................................................................................2  

E-Print Network (OSTI)

2 Bioenergy in the climate policy framework................................................................6 2.1 Reporting and accounting systems..................................................................6

Prepared Giuliana Zanchi; Naomi Pena; Neil Bird

2010-01-01T23:59:59.000Z

446

Managing Liquidity Risk in a Changing Debt Environment: The Issuer's Perspective  

E-Print Network (OSTI)

General Reserve Fund (Oman) $2 billion; and Azerbaijan StateOil Fund Azerbaijan) $1 billion. Id. at 2. This list does

Gabilondo, José

2007-01-01T23:59:59.000Z

447

Financing Solar PV at Government Sites with PPAs and Public Debt (Brochure)  

Science Conference Proceedings (OSTI)

Historically, state and local governmental agencies have employed one of two models to deploy solar photovoltaic (PV) projects: (1) self-ownership (financed through a variety of means) or (2) third-party ownership through a power purchase agreement (PPA). Morris County, New Jersey, administrators recently pioneered a way to combine many of the benefits of self-ownership and third-party PPAs through a bond-PPA hybrid, frequently referred to as the Morris Model. At the request of the Department of Energy?s Solar Market Transformation group, NREL examined the hybrid model. This fact sheet describes how the hybrid model works, assesses the model?s relative advantages and challenges as compared to self-ownership and the third-party PPA model, provides a quick guide to project implementation, and assesses the replicability of the model in other jurisdictions across the United States.

Not Available

2011-12-01T23:59:59.000Z

448

Household Debt in Seventeenth-Century Württemberg: Evidence from Personal Inventories  

E-Print Network (OSTI)

a fair division, defend their interests against those of the surviving spouse who would have inside in formation about the size and composition of the estate, and ensure that they were formally exempted from garnishment should undisclosed loans... courts – loss of collateral (where this had been provided), fining , imprisonment, garnishment of inheritance, confiscation of funds from personal pledges or family members, and even being declared “Mundtot” (deprived of th e legal right to conduct...

Ogilvie, Sheilagh; Küpker, Markus; Maegraith, Janine

449

LDC debt and policy linkages in the determination of world commodity prices  

E-Print Network (OSTI)

Coarse Grain, Rice, and Cotton Prices Explanatory VariablesDependent Variables\\ Wheat Prices Impact (standard error)Inter La DW I Coarse Grain Prices Impact (standard error)

Rausser, Gordon C.; Brazelon, Coleman

1990-01-01T23:59:59.000Z

450

Managing Liquidity Risk in a Changing Debt Environment: The Issuer's Perspective  

E-Print Network (OSTI)

statements in their financial statements. Id. In 1971, thePosition” in a firm’s financial statements. A M . I NST . OFa reader of a firm’s financial statements how much liquidity

Gabilondo, José

2007-01-01T23:59:59.000Z

451

Financing Solar PV at Government Sites with PPAs and Public Debt (Brochure)  

DOE Green Energy (OSTI)

Historically, state and local governmental agencies have employed one of two models to deploy solar photovoltaic (PV) projects: (1) self-ownership (financed through a variety of means) or (2) third-party ownership through a power purchase agreement (PPA). Morris County, New Jersey, administrators recently pioneered a way to combine many of the benefits of self-ownership and third-party PPAs through a bond-PPA hybrid, frequently referred to as the Morris Model. At the request of the Department of Energy's Solar Market Transformation group, NREL examined the hybrid model. This fact sheet describes how the hybrid model works, assesses the model's relative advantages and challenges as compared to self-ownership and the third-party PPA model, provides a quick guide to project implementation, and assesses the replicability of the model in other jurisdictions across the United States.

Not Available

2011-11-01T23:59:59.000Z

452

Contagion by shared financial intermediary in the pre-1914 London sovereign debt market  

E-Print Network (OSTI)

This thesis consists of one empirical essay on contagion (co-authored with Joao Manoel Pinho de Mello¹ and Marcelo de Paiva Abreu²). We document a novel type of international financial contagion whose driving force is ...

Sodre, Antonio Carlos de Azevedo

2011-01-01T23:59:59.000Z

453

Quenching of internal rotations versus collisional cooling at ultralow energies for weakly interacting partners: Cs{sub 2}({sup 3{Sigma}}{sub u}{sup +}) with {sup 3,4}He  

SciTech Connect

Quantum-scattering calculations at ultralow (close to 10{sup -6} cm{sup -1}) collision energies are carried out for the Cs dimer in its spin-stretched triplet state, interacting with helium. An ab initio potential energy surface is computed and employed, while the target molecule is kept in its ground vibrational state and several excitated initial rotational states are considered in the quantum dynamics. The highly anisotropic interaction is seen to cause, in spite of its weakness, internal energy quenching rates comparable with the efficiency of the collisional cooling of relative kinetic energies. The rates of spin-flip processes are also analyzed and compared with pure rotational quenching events.

Caruso, D.; Tacconi, M.; Gianturco, F. A. [Department of Chemistry and CNISM, University of Rome La Sapienza, Piazzale A. Moro 5, I-00185 Rome (Italy); Yurtsever, E. [Department of Chemistry, Koc University, Rumelifeneriyolu, TR-34450 Sariyer, Istanbul (Turkey)

2010-04-15T23:59:59.000Z

454

Genizah MS T-S AS 148.125  

E-Print Network (OSTI)

Recto: document (note or receipt) that the elder Ibrahim al-Parnas gave the writer an exchange bill for the monthly wage on the account of the elder Ab? l-?asan al-?ar?r?. The writer received '18' and there remains a rest of the debt. Verso...

Unknown

2011-02-24T23:59:59.000Z

455

Giant waves in weakly crossing sea states  

Science Conference Proceedings (OSTI)

The formation of rogue waves in sea states with two close spectral maxima near the wave vectors k{sub 0} {+-} {Delta}k/2 in the Fourier plane is studied through numerical simulations using a completely nonlinear model for long-crested surface waves [24]. Depending on the angle {theta} between the vectors k{sub 0} and {Delta}k, which specifies a typical orientation of the interference stripes in the physical plane, the emerging extreme waves have a different spatial structure. If {theta} {<=} arctan(1/{radical}2), then typical giant waves are relatively long fragments of essentially two-dimensional ridges separated by wide valleys and composed of alternating oblique crests and troughs. For nearly perpendicular vectors k{sub 0} and {Delta}k, the interference minima develop into coherent structures similar to the dark solitons of the defocusing nonlinear Schroedinger equation and a two-dimensional killer wave looks much like a one-dimensional giant wave bounded in the transverse direction by two such dark solitons.

Ruban, V. P., E-mail: ruban@itp.ac.r [Landau Institute for Theoretical Physics (Russian Federation)

2010-03-15T23:59:59.000Z

456

Two new weak constraint qualifications and applications  

E-Print Network (OSTI)

ification, that we call Constant Rank of the Subspace Component (CRSC). CQ. .... and visualize. ...... (General SQP) Let C > 0, x0 ? F, H0 ? Rn×n a symmetric.

457

Weak and Strong k-connectivity games  

E-Print Network (OSTI)

For a positive integer $k$ we consider the $k$-vertex-connectivity game, played on the edge set of $K_n$, the complete graph on $n$ vertices. We first study the Maker-Breaker version of this game and prove that, for any integer $k \\geq 2$ and sufficiently large $n$, Maker has a strategy for winning this game within $\\lfloor k n/2 \\rfloor + 1$ moves, which is clearly best possible. This answers a question of Hefetz, Krivelevich, Stojakovi\\'c and Szab\\'o. We then consider the strong $k$-vertex-connectivity game. For every positive integer $k$ and sufficiently large $n$, we describe an explicit first player's winning strategy for this game.

Ferber, Asaf

2012-01-01T23:59:59.000Z

458

Weak Verifiable Random Functions Zvika Brakerski1  

E-Print Network (OSTI)

]. A VRF is a pseudorandom function (see Goldreich, Goldwasser and Micali [2]), that also enables. The VRF's seed (or secret key) SK is associated with a public key PK. As usual, SK can be used to compute interpreted as a public-key of a VRF constitutes a commitment to at most one output per input. VRFs

Bejerano, Gill

459

Energy Current Correlations For Weakly Anharmonic Lattices  

E-Print Network (OSTI)

We discuss energy current correlations in thermal equilibrium and point out the linkage to the fluctuating Peierls equation.

Herbert Spohn

2007-06-06T23:59:59.000Z

460

Optimal bounds for quantum weak oblivious transfer  

E-Print Network (OSTI)

Oblivious transfer is a fundamental cryptographic primitive in which Bob transfers one of two bits to Alice in such a way that Bob cannot know which of the two bits Alice has learned. We present an optimal security bound for quantum oblivious transfer protocols under a natural and demanding definition of what it means for Alice to cheat. Our lower bound is a smooth tradeoff between the probability B with which Bob can guess Alice's bit choice and the probability A with which Alice can guess both of Bob's bits given that she learns one of the bits with certainty. We prove that 2B + A is greater than or equal to 2 in any quantum protocol for oblivious transfer, from which it follows that one of the two parties must be able to cheat with probability at least 2/3. We prove that this bound is optimal by exhibiting a family of protocols whose cheating probabilities can be made arbitrarily close to any point on the tradeoff curve.

André Chailloux; Gus Gutoski; Jamie Sikora

2013-10-11T23:59:59.000Z

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.


461

Weak Lowness Notions for Kolmogorov Complexity  

E-Print Network (OSTI)

COMPLEXITY First we define truth-table reducibility, atwo reals A and B, A is truth-table reducible to B (A ? ttn) = 0 by looking at a ‘truth-table’ of the relevant bits of

Herbert, Ian-Cadoc Robertson

2013-01-01T23:59:59.000Z

462

Microstructural, Anisotropy, and Weak Link Influences  

Science Conference Proceedings (OSTI)

...R.D. Blaugher, High-Temperature Superconductors for Wires and TapesSuperconducting Materials, Vol 2, ASM Handbook,

463

Weak information work in scientific discovery  

Science Conference Proceedings (OSTI)

Scientists continually work with information to move their research projects forward, but the activities involved in finding and using information and their impact on discovery are poorly understood. In the Information and Discovery in Neuroscience (IDN) ... Keywords: Information practices, Information seeking, Neuroscience, Research processes, Scientific discovery

Carole L. Palmer; Melissa H. Cragin; Timothy P. Hogan

2007-05-01T23:59:59.000Z

464

 

Science Conference Proceedings (OSTI)

... Conversion of debt for Poland. Description: What reports and studies are there concerning the conversion of debt. for Poland? ...

465

PSH-12-0123 - In the Matter of Personnel Security Hearing | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

23 - In the Matter of Personnel Security Hearing 23 - In the Matter of Personnel Security Hearing PSH-12-0123 - In the Matter of Personnel Security Hearing On February 15, 2013, an OHA Hearing Officer issued a decision in which he determined that the DOE should not restore an individual's access authorization. As security concerns under 10 CFR Part 710, a Local Security Office cited the individual's filing of a Chapter 7 bankruptcy petition in 2002, and the individual's more recent financial difficulties, including a number of delinquent debts, the largest of which was a $132,489 mortgage balance, payments on which were over 150 days past due. The Hearing Officer found that, while the individual had made some progress toward paying off his prior debts, significant debts remained unpaid, including his mortgage, and the individual had, in addition,

466

Poverty, Armed Conflict and Financial Instability  

E-Print Network (OSTI)

on mortgaging of future returns from resource wealth, tapping into influential international private interests. For example, Angolan war funding was on the basis of oil reserves and diamonds, which led to 95% of Angola?s oil share being used in debt servicing... ). Weak financial regulation in underdeveloped economics promotes wealth accumulation via fraud, destroying savings and living standards and sparking conflict; for example, during the 1997 collapse of Albanian pyramid schemes; the central bank was unable...

Baddeley, Michelle

467

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

E-Print Network (OSTI)

Affairs, Subcommittee on International Finance and Monetary Policy, “Affairs Committee, Subcommittee on International Finance and Monetary Policy,

Doherty, E.

1995-01-01T23:59:59.000Z

468

What is the Risk of European Sovereign Debt Defaults? Fiscal Space, CDS Spreads and Market Pricing of Risk  

E-Print Network (OSTI)

10 PRT correlation = -.6217 ESP ITA GRC IRL MYS COL ZAF MEXcds CZE cds DEU cds DNK cds ESP cds EST cds FIN cds FRA cdsGRC gr IRL ir ITA it PRT pt ESP es AUS au CHL cl CZE cz DNK

Aizenman, Joshua; Hutchison, Michael; Jinjarak, Yothin