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Note: This page contains sample records for the topic "marketplace constraints limit" from the National Library of EnergyBeta (NLEBeta).
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We encourage you to perform a real-time search of NLEBeta
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1

A marketplace game with neither distribution costs nor distribution-capacity constraints  

E-Print Network [OSTI]

neither distribution costs nor distribution-capacity constraints. II. THE CLEARING PRICE FOR LINEAR DEMAND-RESPONSE-sensitive demand. In turn, based on this demand response, the suppliers determine their optimal prices). We model aggregate consumer demand to be linear in response to clearing price1, D() = Dmax(1-/max

Squicciarini, Anna Cinzia

2

Renewables Marketplace | Open Energy Information  

Open Energy Info (EERE)

Marketplace Jump to: navigation, search Name: Renewables Marketplace Place: Palm Desert, California Zip: 92211 Sector: Renewable Energy Product: The Renewables Marketplace is a...

3

Marketplace Maturity | Department of Energy  

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

Soft Costs Marketplace Maturity Marketplace Maturity Photo of houses with solar panels on the roof. DOE supports advances in the solar market through innovation as well as...

4

In today's highly competitive marketplace,  

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

today's highly competitive marketplace, rapid creation today's highly competitive marketplace, rapid creation and commercialization of scientific advances and innovative technologies are key to the continued prosperity of the United States. Scientists and engineers at Lawrence Livermore National Laboratory (LLNL) have achieved numerous science and technology breakthroughs that have led to new industries, spurred economic growth and benefited the national welfare.

5

Religion in the secular marketplace  

E-Print Network [OSTI]

A design thesis which proposes to create a new religious mall in the growing Texas suburb of Frisco: a design proposal for interfaith space conceived of as a 'marketplace of ideas' in which religions, religious businesses, ...

Telecky, Alexandra (Alexandra Lawrence)

2008-01-01T23:59:59.000Z

6

"The dance of the marketplace"  

E-Print Network [OSTI]

Architecture as infill; or the method by which the patterns of context are synthesized in the process of intervention, stands as the base of this thesis. The work uses and defines the marketplace as a building type generated ...

Bolańos, Michael Raul

1983-01-01T23:59:59.000Z

7

Marketplace Training Marketplace offers several training opportunities below. To request a dedicated training for your department or group, or for  

E-Print Network [OSTI]

Marketplace Training Marketplace offers several training opportunities below. To request a dedicated training for your department or group, or for general questions about Marketplace please contact

Tsien, Roger Y.

8

The floating marketplace of San Juan Bay  

E-Print Network [OSTI]

This thesis seeks to establish the marketplace as a temporal and spatial event that affects a city in a meaningful way. The marketplace was the site of greatest congestion, activity and drama in many cities, often combining ...

Carbonell, Jorge (Jorge R.), 1975-

2002-01-01T23:59:59.000Z

9

Online Marketplace for Residential Measures  

E-Print Network [OSTI]

experimenting with online marketplaces/LED lighting ? Current marketplace solutions are not meeting the needs (or volume requirements) of REPs ? There is an education gap about quality products to promote ? There is a lack of urgency for customers to buy now 7... LED 31% 8w R20 LED 1% 10w BR30 LED 23% 12w BR40 LED Dimm 11% 5w Candle LED E12 Base 7% 10.5w A19 Omni SlimStyle 13% 15w A21 LED 2% 10.5w BR30 LED 1% A21 Omni LED 1% 20w Par38 LED 5% 8w G25 Globe LED 5% 7w MR16 LED 0% # Sold ESL-KT-14-11-09 CATEE...

Ashe,J.; MBA; BEP

2014-01-01T23:59:59.000Z

10

New Online Marketplace for Small Business Contracting Launched...  

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

New Online Marketplace for Small Business Contracting Launched by Presidential Fellows New Online Marketplace for Small Business Contracting Launched by Presidential Fellows...

11

Optimal power flow considering fault current level constraints and fault current limiters  

Science Journals Connector (OSTI)

Abstract The aim of this paper is to present a novel method to dispatch the active generation power properly in the power system while incorporating fault current levels as constraints for the optimization problem. Due to the limited capacity of protective devices such as circuit breakers, allocating active power without considering fault current levels can probably lead to fault currents exceeding the rating of these devices. Hence restricting the fault current levels to an allowable amount while minimizing a specified objective function seems to be necessary. In a number of cases even the appropriate allocation of active power is not able to reduce the fault current levels to the permitted amount therefore using fault current limiters (FCL) is unavoidable. In this paper also a planning scheme is presented for the location and sizing of fault current limiters and the effect of fault current limiters on the objective functions is investigated.

Amirhossein Khazali; Mohsen Kalantar

2014-01-01T23:59:59.000Z

12

Marketplace Opportunities for Integration of Biobased and  

E-Print Network [OSTI]

-------------------------------------------------------------------------------------------------------- 9-10 - Bio based/ compostable plastics conventional plastics market targetsMarketplace Opportunities for Integration of Biobased and Conventional Plastics September 2014 Jim --------------------------------------------------------------------------------------------------------------------------- 4 1. Present size and segmentation of the conventional plastics industry by volume of plastics used

Ciocan-Fontanine, Ionut

13

Health Insurance Marketplace Notification UCF is required to furnish the accompanying Health Insurance Marketplace  

E-Print Network [OSTI]

Health Insurance Marketplace Notification UCF is required to furnish the accompanying Health provides the following information: Information on Health Insurance Marketplace - visit www.HealthCare.gov Information About Health Coverage Offered by the State of Florida Contact Information for People First, SOF

Wu, Shin-Tson

14

The broadcast marketplace : Designing a more efficient local marketplace for goods and services  

E-Print Network [OSTI]

Today's online marketplaces for goods and services are imperfect. Participants make an initial post expressing their intention to buy or sell an object, but all offers on this post are private. These offers can be seen as ...

Blackshaw, Matthew (Matthew Andrew)

2012-01-01T23:59:59.000Z

15

DipZoom: The Internet Measurements Marketplace  

E-Print Network [OSTI]

DipZoom: The Internet Measurements Marketplace (Position Paper) Michael Rabinovich, Sipat Triukose measurements. Unlike existing approaches that face a difficult challenge of building a measurement platform with suf- ficiently diverse measurements and measuring hosts, DipZoom offers a matchmaking service instead

Rabinovich, Michael "Misha"

16

Technical constraints limiting application of enhanced oil recovery techniques to petroleum production in the United States  

SciTech Connect (OSTI)

In the interval since the publication in September 1980 of the technical constraints that inhibit the application of enhanced oil recovery techniques in the United States, there has been a large number of successful field trials of enhanced oil recovery (EOR) techniques. The Department of Energy has shared the costs of 28 field demonstrations of EOR with industry, and the results have been made available to the public through DOE documents, symposiums and the technical literature. This report reexamines the constraints listed in 1980, evaluates the state-of-the-art and outlines the areas where more research is needed. Comparison of the 1980 constraints with the present state-of-the-art indicates that most of the constraints have remained the same; however, the constraints have become more specific. 26 references, 6 tables.

Not Available

1984-01-01T23:59:59.000Z

17

Towards an Open Cloud Marketplace Vision and First Steps  

E-Print Network [OSTI]

and First Steps.'' October 2013. Page 2 of 12 The Cloud Marketplace e notion of co putin as a co odit

18

New Ideas for Seeding Your Solar Marketplace Program Pilots and...  

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

for Seeding Your Solar Marketplace Program Pilots and Embedded Experiments AGENDA May 22, 2014 Hilton Anaheim Anaheim, California 08:30 CONTINENTAL BREAKFAST 09:00 INTRODUCTION...

19

New Ideas for Seeding Your Solar Marketplace Workshop Panel Presentati...  

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

Panel Presentations New Ideas for Seeding Your Solar Marketplace Workshop Panel Presentations Download the speaker presentations from the 2014 SunShot Grand Challenge Summit and...

20

Technical constraints limiting application of enhanced oil recovery techniques to petroleum production in the United States  

SciTech Connect (OSTI)

A critical examination of the potential and the technical constraint that inhibit the application of enhanced oil recovery techniques in the United States has been initiated and is expected to continue. The examination is based on the results of extensive laboratory and field applications now underway under various forms of Department of Energy support. This interim report will be amplified as data become available and as progress is made toward resolving technical constraints. Comments on the approach and substance of the information contained herein are welcome.

Not Available

1980-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

New Online Marketplace for Small Business Contracting Launched by  

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

New Online Marketplace for Small Business Contracting Launched by New Online Marketplace for Small Business Contracting Launched by Presidential Fellows New Online Marketplace for Small Business Contracting Launched by Presidential Fellows January 17, 2013 - 2:54pm Addthis John Hale III John Hale III Director, Office of Small and Disadvantaged Business Utilization Editor's Note: This article was originally posted on the Small Business Administration's website. The U.S. Small Business Administration, in conjunction with the White House's Presidential Innovation Fellows, today launched a "beta" (pilot) version of RFP-EZ, a new online marketplace that streamlines the government contracting process, making it simpler for small businesses to find and bid on low-dollar contracts from federal agencies. The new program allows the government to source low-cost, high-impact

22

New Ideas for Seeding Your Solar Marketplace Workshop Preread  

Broader source: Energy.gov [DOE]

This is the preread memo by Adam Cohen for the 2014 SunShot Summit Grand Challenge and Peer Review Workshop, New Ideas for Seeding Your Solar Marketplace: Program Pilots and Embedded Experiments.

23

New Ideas for Seeding Your Solar Marketplace Workshop Worksheet  

Broader source: Energy.gov [DOE]

This is a worksheet by Adam Cohen, fellow for the SunShot Initiative, for the 2014 SunShot Grand Challenge Summit and Peer Review Workshop, "New Ideas for Seeding Your Solar Marketplace: Program Pilots and Embedded Experiments."

24

New Ideas for Seeding Your Solar Marketplace Workshop Panel Presentations  

Broader source: Energy.gov [DOE]

Download the speaker presentations from the 2014 SunShot Grand Challenge Summit and Peer Review Workshop, "New Ideas for Seeding Your Solar Marketplace: Program Pilots and Embedded Experiments."

25

Green academy helps researchers enter the marketplace | Department of  

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

Green academy helps researchers enter the marketplace Green academy helps researchers enter the marketplace Green academy helps researchers enter the marketplace March 29, 2010 - 11:07am Addthis Andrew Hargadon teaches a workshop at Green Technology Entrepreneurship Academy in Incline Village, Nevada.
| Photo Courtesy of University of California, Davis Andrew Hargadon teaches a workshop at Green Technology Entrepreneurship Academy in Incline Village, Nevada.
| Photo Courtesy of University of California, Davis Stephen Graff Former Writer & editor for Energy Empowers, EERE Before wading into the green energy sector, there are crucial things every budding entrepreneur should know: think like an investor, know your customer, and prove your research is going to solve a problem. To the business-savvy this advice may seem obvious, but for the

26

PPPL's MINDS Technology Takes Nuclear Detection to the Marketplace |  

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

PPPL's MINDS Technology Takes Nuclear Detection to the Marketplace PPPL's MINDS Technology Takes Nuclear Detection to the Marketplace PPPL's MINDS Technology Takes Nuclear Detection to the Marketplace October 20, 2011 - 5:25pm Addthis Charles Gentile (center) and other members of the MINDS team, including Ken Silber (right) and Bill Davis (left) work on new techniques to identify radionuclides. | Photo by Elle Starkman/Princeton Plasma Physics Laboratory Office of Communications Charles Gentile (center) and other members of the MINDS team, including Ken Silber (right) and Bill Davis (left) work on new techniques to identify radionuclides. | Photo by Elle Starkman/Princeton Plasma Physics Laboratory Office of Communications April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs What are the key facts?

27

DOE SUCCESS STORIES: THE ENERGY MISSION IN THE MARKETPLACE  

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

SUCCESS STORIES: THE ENERGY MISSION IN THE MARKETPLACE SUCCESS STORIES: THE ENERGY MISSION IN THE MARKETPLACE Published by: DOE Office of Science Policy 5/95 Contact person: Bob Marley, Director of Office of Science Policy, (202) 5863900 l DOE Success Stories: The Energy Mission in the Marketplace 0 Energy Mission 0 Role of Federal R&D 0 What Successes 0 Improved R&D 0 Economic Successes 0 R&D Management Principles 0 R&D Considerations 0 Deficit Reduction or Revenue Enhancement l Increasinp Energy Efficiency 0 Building Technologies n Fluorescent Lamp Electronic Ballasts n Advanced Energy Efficient Windows n Sulfur Lamp I Computerized AnalyticalTool for Energy Efficient Building Design n High Efficiency Refrigerator Freezer Compressor w Flame Retention Head Oil Burner n Flame Quality Indicator

28

New Health Insurance Marketplace Coverage Options and Your Health Coverage  

E-Print Network [OSTI]

of tax credit that lowers your monthly premium right away. Open enrollment for health insurance coverage will not be eligible for a tax credit through the Marketplace and may wish to enroll in your employer's health plan. However, you may be eligible for a tax credit that lowers your monthly premium, or a reduction in certain

29

New Health Insurance Marketplace Coverage Options and Your Health Coverage  

E-Print Network [OSTI]

When key parts of the health care reform law (the Affordable Care Act or ACA) take effect in 2014 your employer, you may qualify for Medicaid depending on your household income. Please visit www.HealthCare coverage options, including your eligibility for coverage through the Marketplace and its cost. Visit http://www.HealthCare

Ziurys, Lucy M.

30

Limiter  

DOE Patents [OSTI]

A limiter with a specially contoured front face is provided. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution. This limiter shape accommodates the various power scrape-off distances lambda p, which depend on the parallel velocity, V/sub parallel/, of the impacting particles.

Cohen, S.A.; Hosea, J.C.; Timberlake, J.R.

1984-10-19T23:59:59.000Z

31

Limiter  

DOE Patents [OSTI]

A limiter with a specially contoured front face accommodates the various power scrape-off distances .lambda..sub.p, which depend on the parallel velocity, V.sub..parallel., of the impacting particles. The front face of the limiter (the plasma-side face) is flat with a central indentation. In addition, the limiter shape is cylindrically symmetric so that the limiter can be rotated for greater heat distribution.

Cohen, Samuel A. (Hopewell, NJ); Hosea, Joel C. (Princeton, NJ); Timberlake, John R. (Allentown, NJ)

1986-01-01T23:59:59.000Z

32

From the Lab to the Marketplace-Ten Years Later  

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

From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. From the Lab to the Marketplace The United States consumes about 100 quadrillion BTUs (100 quads) of energy at the cost of $1 trillion each year, roughly 10% of our Gross Domestic Product. This energy is used by the nation's 114 million households, 82 billion square feet of commercial building floor space, 130 million cars, 95 million trucks, other modes of transportation, and by millions of manufacturing establishments large and small, to power the economy, and improve our lives. Burning fossil fuels to produce energy leads to a variety of well-known

33

The Art of the Start: Moving Science from the Lab to the Marketplace  

ScienceCinema (OSTI)

April 25, 2009 Berkeley Lab Nano*High lecture: The Art of the Start: Moving Science from the Lab to the Marketplace

Larry Bock

2010-01-08T23:59:59.000Z

34

An investigation to define the physical/chemical constraints which limit NO sub x emission reduction achievable by reburning  

SciTech Connect (OSTI)

Reburning is a combustion modification technique which removes NO{sub x} from combustion products by using fuel as a reducing agent. Previous studies have shown that natural gas is more effective than coal as a reburning fuel. Objectives of this program are to define the chemical and physical constraints which prevent the attainment of 85% NO{sub x} reduction with reburning and to test improved configurations for reburning as an advanced NO{sub x} control technique for coal-fired boilers. Bench scale studies are designed to screen the chemical and physical means for enhancing reburning efficiency. Pilot studies will evaluate the impacts of finite rate mixing on the effectiveness of the various concepts. The program consists of the following tasks: (1) Project Work Plan, (2) Chemical Enhancement of Reburning, (3) Physical Enhancement of Reburning, (4) Concept Verification, (5) Interpretation and Generalization, and (6) Final Report. This report documents the results obtained on Task 2. The focus of this task is to study the chemical means of maximizing N{sub 2} formation both in the reburning zone and in the burnout zone. The experiments were conducted in the bench scale Control Temperature Tower (CTT), which is a downfired, refractory lined tunnel furnace which is 20 cm in diameter and 2.4 m in length. 6 figs.

McCarthy, J. M.; Ho, L.; Chen, S. L.

1988-01-01T23:59:59.000Z

35

New Ideas for Seeding Your Solar Marketplace Workshop Presentation, Adam Cohen  

Broader source: Energy.gov [DOE]

This is the presentation by Adam Cohen, fellow for the SunShot Initiative, for the 2014 SunShot Summit Grand Challenge and Peer Review Workshop, "New Ideas for Seeding Your Solar Marketplace: Program Pilots and Embedded Experiments."

36

The extended ROSAT-ESO Flux-Limited X-ray Galaxy Cluster Survey (REFLEX II) VI. Effect of massive neutrinos on the cosmological constraints from clusters  

E-Print Network [OSTI]

Clusters of galaxies are important probes for the large-scale structure that allow us to test cosmological models. With the REFLEX II galaxy cluster survey we previously derived tight constraints on the cosmological parameters for the matter density, Omega_m, and the amplitude parameter of the matter density fluctuations, sigma_8. Whereas in these previous studies no effect of massive neutrinos was taken into account, we explore these effects in the present publication. We derive cosmological constraints for the sum of the neutrino masses of the conventional three neutrino families in the range 0 to 0.6 eV. The influence on the constraints of Omega_m and sigma_8 for the expected mass range is weak. Interesting constraints on the neutrino properties can be derived by comparing the cluster data with those from the Planck cosmic microwave background observations. The current tension between the Planck results and clusters can formally be resolved with neutrino masses of about M_nu = 0.45 (+- 0.28, 1-sigma) eV. W...

Boehringer, Hans

2015-01-01T23:59:59.000Z

37

As the BPM marketplace continues its rapid evolution, there is an increasing array of technology offerings  

E-Print Network [OSTI]

As the BPM marketplace continues its rapid evolution, there is an increasing array of technology) the increasing diversity of offerings that fall under the BPM technology umbrella, and (2) the complexity. As illustrated in Figure 1, the potential range of tech- nologies on which a BPM solution might be based

van der Aalst, Wil

38

Using Agents to Secure the Internet Marketplace Reactive Security and Social Control  

E-Print Network [OSTI]

Using Agents to Secure the Internet Marketplace Reactive Security and Social Control Lars Rasmusson present the idea to let agents handle security issues in Internet markets. The motivation for this is the difficulties in having external or centralized control over a system as open as the Internet. The agents use

39

INNOVATION MARKETPLACE A QUARTERLY UPDATE OF AVAILABLE TECHNOLOGIES...  

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

limited by their ability to operate on only one plane, and do not offer complete three-dimensional control. Applications and Industries * LEDs * Lighting * Medical devices...

40

References : Appendices : From the Lab to the Marketplace-Ten Years Later  

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

References References From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. References General Lawrence Berkeley National Laboratory. From the Lab to the Marketplace: Making America's Buildings More Energy-Efficient. PUB-758, Revised March 1995. National Research Council. Energy Research at DOE: Was It Worth It? National Academy Press, Washington D.C., 2001. Lighting Ballasts Verderber, R.R. Electronic High Frequency Fluorescent Ballasts (Past, Present and Future). Energy Cost Avoidance in Education Buildings Conference, LBL-28792, 1990. Verderber, R.R. Fluorescent Lamp Fixtures and Ballasts. EPRI Lighting and

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Taking Smart Grid Technology Out of the Lab and Into the Marketplace |  

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

Taking Smart Grid Technology Out of the Lab and Into the Taking Smart Grid Technology Out of the Lab and Into the Marketplace Taking Smart Grid Technology Out of the Lab and Into the Marketplace April 15, 2011 - 1:12pm Addthis Andrew Gumbiner Contractor, Advanced Research Projects Agency-Energy. What does this mean for me? The ARPA-E, Duke Energy and EPRI partnership will take early stage technologies out of the lab and test them to see if they can revolutionize the way we use and store electricity. These technologies are aimed at enhancing smart grid development, grid scale energy storage, power electronics, and energy efficient cooling systems. Duke Energy could deploy these technologies at its various power plants and wind farms, which serve approximately 4 million people. In his 2011 State of the Union address, President Obama challenged

42

Helping Small Businesses Bring Their Clean Energy Ideas to the Marketplace  

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

Small Businesses Bring Their Clean Energy Ideas to the Small Businesses Bring Their Clean Energy Ideas to the Marketplace Helping Small Businesses Bring Their Clean Energy Ideas to the Marketplace July 22, 2010 - 2:39pm Addthis Dr. Kristina Johnson Small businesses play a large role in shaping the American economy and the clean energy revolution. They're an engine of job growth -- creating around two out of every three new jobs in this country -- and they are sources of the innovation and bold ideas that our country needs to address our energy challenges. While larger firms and corporations provide the heft to help energy technologies reach global markets, small businesses thrive at the other end of the spectrum: in the innovation of new energy products and services. They're quicker to adopt new approaches and more willing to take on

43

NREL: Jobs and Economic Competitiveness - Supply Constraints...  

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

Supply Constraints Analysis Some of the materials used in solar PV modules, such as tellurium and indium, are rare materials in limited supply. Solar PV technologies have grown...

44

From Mind to Marketplace: SunShot Incubator's Latest ProtĂ©gĂ©s Get to  

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

From Mind to Marketplace: SunShot Incubator's Latest Protégés From Mind to Marketplace: SunShot Incubator's Latest Protégés Get to Work From Mind to Marketplace: SunShot Incubator's Latest Protégés Get to Work October 22, 2013 - 1:00pm Addthis Workers from Clean Power Research review a software platform that aims to lower the costs associated with connecting distributed solar electricity generation to the grid. The platform is one of several projects funded through the Energy Department’s SunShot Incubator Program, which provides early-stage assistance to help small businesses cross technological barriers to commercialization. | Photo courtesy of Clean Power Research Workers from Clean Power Research review a software platform that aims to lower the costs associated with connecting distributed solar electricity

45

T-Mobile and Nokia collaborate to open up an integrated marketplace for mobile content and Internet services  

E-Print Network [OSTI]

T-Mobile and Nokia collaborate to open up an integrated marketplace for mobile content and Internet and other content offered by both T-Mobile's widget gallery and Nokia's Ovi Store · Through T-Mobile's web of their mobile phone · Launching on mass market Nokia Series 40 platform based phones Today T-Mobile and Nokia

Deutschmann, Rainer

46

Berkeley Hood : Technologies : From the Lab to the Marketplace-Ten Years  

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

Hood Hood From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. Berkeley Hood The average fume hood consumes three-and-a-half-times as much energy as an average house in the U.S. Fume hoods are widely used to protect workers from breathing harmful substances in research laboratories, industrial shops, school labs and pharmaceutical and biotechnology facilities. A typical hood is a box, often mounted at tabletop level, with a moveable window-like "face" or sash. Hazardous fumes are drawn out of the hood through a port at the top. Researchers at Berkeley Lab estimate that the

47

Appliance Standards : New Concepts : From the Lab to the Marketplace-Ten  

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

Appliance Standards Appliance Standards From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. Appliance Standards Residential consumers spent $215 billion and commercial consumers spend $154 billion in 20051 on energy for appliances, heating and cooling equipment and lighting, which consumption resulted in 2305 million metric tons of carbon dioxide emissions2. For many years, Berkeley Lab researchers have provided the technical analysis used by the Department of Energy as it established energy efficiency standards for appliances mandated by law. Berkeley Lab's energy policy work includes analyzing the effects on energy

48

Credits : Appendices : From the Lab to the Marketplace-Ten Years Later  

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

Credits Credits From the Lab to the Marketplace Ten Years Later, Energy Efficient Technologies from Research at the Lawrence Berkeley National Laboratory Berkeley Lab logo (left) with six rows of gray dots transitioning to a line art drawing of a cityscape and residential houses. Credits Editor: Allan Chen Writer: Annalise Blum Additional Writing: Allan Chen Web Master: Sondra Jarvis Art Direction: Anthony Ma Contributors: Hashem Akbari, Barbara Atkinson, Geoffrey Bell, Paul Berdahl, Sam Berman, Fred Buhl, Robert Cheng, Kathy Ellington, William Fisk, David Fridley, Ashok Gadgil, Christina Galitsky, Stephen Johnson, Mark Levine, Ronnen Levinson, James McMahon, Michael McNeil, Steve Meyers, Evan Mills, Mark Modera, Lynn Price, Thomas Richardson, Francis Rubinstein, Max

49

Mechanical constraints enhance electrical energy densities of soft dielectrics  

E-Print Network [OSTI]

Mechanical constraints enhance electrical energy densities of soft dielectrics Lin Zhang, Qiming, the dielectric will breakdown electrically. The breakdown limits the electrical energy density of the dielectric electric fields and thus increase their electrical energy densities. The mechanical constraints suppress

Ferrari, Silvia

50

Limited Lawn & Limited Commercial  

E-Print Network [OSTI]

Limited Lawn & Ornamental Limited Commercial Landscape Maintenance Review and Exams Limited for Commercial Landscape Maintenance Application: http://www.flaes.org/ pdf/lndspckt.pdf Limited Certification.floridatermitehelp.org or request by phone at 850-921-4177. Limited Lawn & Ornamental/Limited Commercial Landscape Maintenance

Watson, Craig A.

51

Limited Lawn & Limited Commercial  

E-Print Network [OSTI]

Limited Lawn & Ornamental Limited Commercial Landscape Maintenance Review and Exams Limited-921-4177. Limited Lawn & Ornamental/Limited Commercial Landscape Maintenance: Ornamental and Turf Pest Control (SM 7&O/Structural only). See web locations below for applications. Limited Certification for Commercial Landscape

Jawitz, James W.

52

studies CP2001 Constraints  

E-Print Network [OSTI]

CP'01 Part III ­ Case studies CP2001 Tutorial ­ Cyprus November 2001 ­ Case studies -- p.1/20 #12; CP'01 Problems and Soft Constraints Typical real problems include: Hard constraints (physical approach: ad­hoc heuristic (but often efficient) handling. CP2001 Tutorial ­ Cyprus November 2001 ­ Case

Rossi, Francesca

53

Constraint and Restoring Force  

E-Print Network [OSTI]

Long-lived sensor network applications must be able to self-repair and adapt to changing demands. We introduce a new approach for doing so: Constraint and Restoring Force. CRF is a physics-inspired framework for computing ...

Beal, Jacob

2007-08-24T23:59:59.000Z

54

Transformation techniques for OCL constraints  

Science Journals Connector (OSTI)

Constraints play a key role in the definition of conceptual schemas. In the UML, constraints are usually specified by means of invariants written in the OCL. However, due to the high expressiveness of the OCL, the designer has different syntactic alternatives ... Keywords: Integrity constraints, OCL, Transformation

J. Cabot; E. Teniente

2007-10-01T23:59:59.000Z

55

Model-driven constraint programming  

Science Journals Connector (OSTI)

Constraint programming can definitely be seen as a model-driven paradigm. The users write programs for modeling problems. These programs are mapped to executable models to calculate the solutions. This paper focuses on efficient model management (definition ... Keywords: constraint modeling languages, constraint programming, metamodeling, model transformation

Raphaël Chenouard; Laurent Granvilliers; Ricardo Soto

2008-07-01T23:59:59.000Z

56

Antiproton Limits on Decaying Gravitino Dark Matter  

E-Print Network [OSTI]

We report on constraints on the lifetime of decaying gravitino dark matter in models with bilinear R-parity violation derived from observations of cosmic-ray antiprotons with the PAMELA experiment. Performing a scan over a viable set of cosmic-ray propagation parameters we find lower limits ranging from $8\\times 10^{28}$s to $6\\times 10^{28}$s for gravitino masses from roughly 100 GeV to 10 TeV. Comparing these limits to constraints derived from gamma-ray and neutrino observations we conclude that the presented antiproton limits are currently the strongest and most robust limits on the gravitino lifetime in the considered mass range. These constraints correspond to upper limits on the size of the bilinear R-parity breaking parameter in the range of $10^{-8}$ to $8\\times 10^{-13}$.

Grefe, Michael

2014-01-01T23:59:59.000Z

57

An optimal filtering algorithm for table constraints  

Science Journals Connector (OSTI)

Filtering algorithms for table constraints are constraint-based, which means that the propagation queue only contains information on the constraints that must be reconsidered. This paper proposes four efficient value-based algorithms for table constraints, ...

Jean-Baptiste Mairy; Pascal Van Hentenryck; Yves Deville

2012-10-01T23:59:59.000Z

58

Constraints on new interactions from neutron scattering experiments  

E-Print Network [OSTI]

Constraints for the constants of hypothetical Yukawa-type corrections to the Newtonian gravitational potential are obtained from analysis of neutron scattering experiments. Restrictions are obtained for the interaction range between 10^{-12} and 10^{-7} cm, where Casimir force experiments and atomic force microscopy are not sensitive. Experimental limits are obtained also for non-electromagnetic inverse power law neutron-nucleus potential. Some possibilities are discussed to strengthen these constraints.

Yu. N. Pokotilovski

2006-01-19T23:59:59.000Z

59

Health Insurance Marketplace  

E-Print Network [OSTI]

options. You may be able to get coverage now through existing programs. Visit HealthCare.gov to learn more, and coinsurance. You'll want to consider these details while you're exploring your options. Visit HealthCare will offer essential health benefits, including doctor visits, preventive care, hospitalization

Acton, Scott

60

Determining physical constraints in transcriptional initiationcomplexes using DNA sequence analysis  

SciTech Connect (OSTI)

Eukaryotic gene expression is often under the control ofcooperatively acting transcription factors whose binding is limited bystructural constraints. By determining these structural constraints, wecan understand the "rules" that define functional cooperativity.Conversely, by understanding the rules of binding, we can inferstructural characteristics. We have developed an information theory basedmethod for approximating the physical limitations of cooperativeinteractions by comparing sequence analysis to microarray expressiondata. When applied to the coordinated binding of the sulfur amino acidregulatory protein Met4 by Cbf1 and Met31, we were able to create acombinatorial model that can correctly identify Met4 regulatedgenes.

Shultzaberger, Ryan K.; Chiang, Derek Y.; Moses, Alan M.; Eisen,Michael B.

2007-07-01T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

LSPE Interim Stowage Thermal Constraints  

E-Print Network [OSTI]

-arm and thermal battery timers require operating temperatures at or above +40°F for reliable starting when·, ' LSPE Interim Stowage Thermal Constraints· Nl,;. ATM1080 PAGE 1 OF 13 DATE 15 December l97l constraints required for thermal integrity are defined. Prepared by:.:Z4·:..=..-~31!::..--.::..·~-:·::....-c

Rathbun, Julie A.

62

Dose Limits  

Broader source: Energy.gov [DOE]

Dose Limits ERAD (Question Posted to ERAD in May 2012) Who do you define as a member of the public for the onsite MEI? This question implies that there may be more than one maximally exposed individual (MEI), one on-site and one off-site, when demonstrating compliance with the Public Dose Limit of DOE Order 458.1. Although all potential MEIs should be considered and documented, as well as the calculated doses and pathways considered, the intent of DOE Order 458.1 is in fact to ultimately identify only one MEI, a theoretical individual who could be either on-site or off-site.

63

Starting October 1, 2013, you can apply and enroll in health coverage through the Health Insurance Marketplace at HealthCare.gov. Health coverage starts as early as January 1, 2014,  

E-Print Network [OSTI]

Marketplace at HealthCare.gov. Health coverage starts as early as January 1, 2014, and open enrollment ends other sources in 2014. If you don't have coverage, you may have to pay a fee. When you visit HealthCare of HealthCare.gov to apply, compare your options, and enroll in coverage. If you run a small business, you

Acton, Scott

64

New Health Insurance Marketplace Coverage Options and Your Health Coverage Key parts of the Patient Protection and Affordable Care Act, also known as the health care reform law, go into effect January 1, 2014. When this  

E-Print Network [OSTI]

Protection and Affordable Care Act, also known as the health care reform law, go into effect January 1, 2014 by the health care reform law (i.e., the plan's share of the total allowed benefit costs covered by the planNew Health Insurance Marketplace Coverage Options and Your Health Coverage Key parts of the Patient

65

Title 10 USC 2684a Agreements to Limit Encroachments and Other...  

Open Energy Info (EERE)

Agreements to Limit Encroachments and Other Constraints on Military Training, Testing, and Operations Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal...

66

Capacity Constraints Across Nests in Assortment Optimization Under the Nested Logit Model  

E-Print Network [OSTI]

Capacity Constraints Across Nests in Assortment Optimization Under the Nested Logit Model Jacob B Abstract We consider assortment optimization problems when customers choose according to the nested logit in all nests. When each product consumes one unit of capacity, our capacity constraint limits

Topaloglu, Huseyin

67

Cooperative Exploration under Communication Constraints  

E-Print Network [OSTI]

process has not been fully characterized. Existing exploration algorithms do not realistically modelCooperative Exploration under Communication Constraints by Emily M. Craparo Submitted. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . David Darmofal Chairman, Department Committee on Graduate Students #12;2 #12;Cooperative Exploration

How, Jonathan P.

68

Geometric constraint solving: The witness configuration method  

Science Journals Connector (OSTI)

Geometric constraint solving is a key issue in CAD, CAM and PLM. The systems of geometric constraints are today studied and decomposed with graph-based methods, before their numerical resolution. However, graph-based methods can detect only the simplest ... Keywords: Constraints dependences, Decomposition and solving, Geometric constraints, Rigidity theory, The numerical probabilistic method

Dominique Michelucci; Sebti Foufou

2006-04-01T23:59:59.000Z

69

UPDATING CONSTRAINT PRECONDITIONERS FOR KKT ...  

E-Print Network [OSTI]

Nov 29, 2013 ... slack variables, used to transform the inequality constraints A1x ? b1 and x ? u ...... processor, with clock frequency of 2.67 GHz, 12 GB of RAM and 8 MB of cache .... drive the design of effective low-rank correction strategies.

2013-11-29T23:59:59.000Z

70

Structured Communications with Concurrent Constraints  

E-Print Network [OSTI]

a particular care in the defi- nition of typing rules to assure the bilinearity condition in presence constraints, name pass- ing and sessions. In this way we get enough expressivity to represent both quality is a type assignment system whose main novelty is the assurance of channel bilinearity in presence

Torino, UniversitĂ  di

71

Office of Inspector General audit report on ``The U.S. Department of Energy`s X-Change 1997: The global D and D marketplace conference``  

SciTech Connect (OSTI)

The Department of Energy and Florida International University (FIU), a state university, cosponsored the X-Change 1997: The Global D and D Marketplace conference (X-Change Conference) that was held December 1--5, 1997, in Miami, Florida. The purpose of the conference was to disseminate information on decontamination and decommissioning problems, solutions, and technologies to an international audience of government, industry, and academia. Through a contract with the Department, FIU was responsible for conference planning, organization, and logistical support. FIU awarded a subcontract to ICF, Inc. to work on the conference. ICF, Inc. is a major Department contractor with responsibilities for projects at Hanford, Argonne National laboratory and Los Alamos National Laboratory. The audit objectives were to determine whether FIU had controls in place to ensure that public funds were used appropriately, and whether fiscal practices associated with the conference were consistent with Government requirements and Department policy. FIU implemented accounting and budget mechanisms to identify and control the sources and uses of funds. However, the absence of a Departmental policy on funding conferences resulted in questionable fiscal practices associated with the conference. These are discussed.

NONE

1998-10-01T23:59:59.000Z

72

Generating propagators for finite set constraints  

Science Journals Connector (OSTI)

Ideally, programming propagators as implementations of constraints should be an entirely declarative specification process for a large class of constraints: a high-level declarative specification is automatically translated into an efficient propagator. ...

Guido Tack; Christian Schulte; Gert Smolka

2006-09-01T23:59:59.000Z

73

Relational Consistency by Constraint Filtering Shant Karakashian,  

E-Print Network [OSTI]

on every set of k constraints of a finite Constraint Sat- isfaction Problem (CSP). This algorithm operates to every combi- nation of m constraints in a CSP, and the more relaxed property of relational (i, m network, where n is the number of variables in the CSP, thus changing its topology. Another research

Farritor, Shane

74

Turtle: A Constraint Imperative Programming Language  

E-Print Network [OSTI]

Turtle: A Constraint Imperative Programming Language Martin Grabm¨uller and Petra Hofstedt of the programming language Turtle, which inte- grates declarative constraints and imperative language elements describes the design of the higher-order constraint imperative pro- gramming language Turtle1 . Even though

Hofstedt, Petra

75

A log-exponential smoothing method for mathematical programs with complementarity constraints  

Science Journals Connector (OSTI)

In this paper a log-exponential smoothing method for mathematical programs with complementarity constraints (MPCC) is analyzed, with some new interesting properties and convergence results provided. It is shown that the stationary points of the resulting smoothed problem converge to the strongly stationary point of MPCC, under the linear independence constraint qualification (LICQ), the weak second-order necessary condition (WSONC), and some reasonable assumption. Moreover, the limit point satisfies the weak second-order necessary condition for MPCC. A notable fact is that the proposed convergence results do not restrict the complementarity constraint functions approach to zero at the same order of magnitude.

Yanyan Li; Tao Tan; Xingsi Li

2012-01-01T23:59:59.000Z

76

The influence of the dwell time deviation constraint (DTDC) parameter on dosimetry with IPSA optimisation for HDR prostate brachytherapy  

Science Journals Connector (OSTI)

To investigate how the dwell time deviation constraint (DTDC) parameter, applied to inverse planning by simulated annealing (IPSA) optimisation limits large dwell times from occurring in each catheter and to c...

Ryan L. Smith; Vanessa Panettieri…

2014-12-01T23:59:59.000Z

77

Direct Detection Constraints on Dark Photon Dark Matter  

E-Print Network [OSTI]

Dark matter detectors built primarily to probe elastic scattering of WIMPs on nuclei are also precise probes of light, weakly coupled particles that may be absorbed by the detector material. In this paper, we derive constraints on the minimal model of dark matter comprised of long-lived vector states V (dark photons) in the 0.01-100 keV mass range. The absence of an ionization signal in direct detection experiments such as XENON10 and XENON100 places a very strong constraint on the dark photon mixing angle, down to $O(10^{-15})$, assuming that dark photons comprise the dominant fraction of dark matter. This sensitivity to dark photon dark matter exceeds the indirect bounds derived from stellar energy loss considerations over a significant fraction of the available mass range. We also revisit indirect constraints from $V\\to 3\\gamma$ decay and show that limits from modifications to the cosmological ionization history are comparable to the updated limits from the diffuse gamma-ray flux.

Haipeng An; Maxim Pospelov; Josef Pradler; Adam Ritz

2014-12-29T23:59:59.000Z

78

Helioseismic limit on heavy element abundance  

E-Print Network [OSTI]

Primary inversions of accurately measured solar oscillation frequencies coupled with the equations of thermal equilibrium and other input physics, enable us to infer the temperature and hydrogen abundance profiles inside the Sun. These profiles also help in setting constraints on the input physics as well as on heavy element abundance in the solar core. Using different treatments of plasma screening for nuclear reaction rates, limits on the cross-section of proton-proton nuclear reaction as a function of heavy element abundance in the solar core are obtained and an upper limit on heavy element abundance in the solar core is also derived from these results.

H. M. Antia; S. M. Chitre

2002-09-08T23:59:59.000Z

79

Health Insurance Marketplace Notice New Health Insurance Marketplace...  

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

Options and Your Health Coverage PART A: General Information When key parts of the health care law take effect in 2014, there will be a new way to buy health insurance: the...

80

Sparse optimization with least-squares constraints  

E-Print Network [OSTI]

Feb 9, 2010 ... Sparse optimization with least-squares constraints. Ewout van den Berg(ewout78 ***at*** cs.ubc.ca) Michael P. Friedlander(mpf ***at*** ...

Ewout van den Berg

2010-02-09T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Chapter 3 - Forest Landowner Goals, Objectives, and Constraints  

Science Journals Connector (OSTI)

Abstract The manner in which forests and natural resources are managed depends on the objectives, goals, and constraints or limitations of the person or entity controlling them. Since the 1990s, a large body of research has been developed to illustrate how one can develop a forest plan for a forest landowner, but the critical first step is to understand the forces that guide their actions. For example, a small nonindustrial private landowner may be interested in managing a forest for outdoor recreation or conservation purposes, whereas a large private company may be interested in managing a forest to maximize revenue or wood flows of various product classes. Public lands may be managed using a revenue generation objective, but plans for these may place a greater weight on maintaining a diverse forest structure to satisfy numerous constituents. In addition, many people in our society commonly think of public lands as strategic assets that should be managed sustainably across generations. Common constraints of all landowner groups include limits to budgets, capital, or knowledge sufficient to implement specific forestry and natural resource practices at desirable scales. Understanding the diverse management objectives of landowner groups and the limitations that they face in managing their natural resources is critical for successfully communicating and interacting with other natural resource professionals and the broader public.

Donald L. Grebner; Pete Bettinger; Jacek P. Siry

2013-01-01T23:59:59.000Z

82

Minimum variance beamforming with soft response constraints  

Science Journals Connector (OSTI)

Soft constraints on the beamformer response to the signal are examined in the context of minimum variance beamforming. A quadratic constraint on the beamformer weights is used to control the mean-squared error between a desired response and the actual ...

B.D. van Veen

1991-09-01T23:59:59.000Z

83

GEOMETRIC CONSTRAINTS FROM PLANAR SURFACE PATCH MATCHING  

E-Print Network [OSTI]

GEOMETRIC CONSTRAINTS FROM PLANAR SURFACE PATCH MATCHING Robert B. Fisher Dept. of Artificial dimensional scene analysis programs pair data surface patches (i.e. as extracted from range data) to model surface patch features. From the correspon- dences, a variety of rotation and translation constraints

Fisher, Bob

84

Editing Nested Constraints and Application Conditions  

E-Print Network [OSTI]

Editing Nested Constraints and Application Conditions Karl Azab Carl v. Ossietzky Universit¨at Oldenburg, Germany azab@informatik.uni-oldenburg.de Abstract. Nested constraints and application conditions to get these editing features and implemented a tree-oriented visualization for editing nested constrains

Habel, Annegret

85

Performance limits of heliostat fields  

SciTech Connect (OSTI)

Geometric and thermodynamic arguments are used to derive upper limits on the performance of a solar energy collection system, consisting of an axisymmetric heliostat field, a solar tower, secondary optics and a black receiver. Performance limits on collected power, concentration, and work output are presented. Performance of tower systems with several secondary optics options is compared: tower-top Compound Parabolic Concentrator (CPC), Tailored Edge-Ray Concentrator (TERC) approximated by a cone, and Cassegrainian with ground-level CPC or Compound Elliptic Concentrator (CEC). Optimized ray tracing is used to generate the design parameters of the secondary concentrators that yield the highest optical efficiency. The results show that the tower-top Cone provides the best performance regarding both concentration and efficiency, except for very large fields. The Cassegrainian designs come in second, but become equal and even better than the Cone for large fields. The results for the Cassegrainian are sensitive to the value of the reflectivity, due to the additional reflections incurred. The choice of a CEC is better than a CPC for the terminal concentration in a Cassegrainian system, but the difference is small. The suitability of the different design options for high-temperature solar applications is discussed. The recommendations regarding optical configuration depend on field size, as well as on application-specific constraints.

Kribus, A.; Krupkin, V.; Yogev, A. [Weizmann Inst. of Science, Rehovot (Israel). Environmental Sciences and Energy Research Dept.; Spirkl, W. [Ludwig-Maximilians-Univ. Muenchen (Germany). Sektion Physik

1998-11-01T23:59:59.000Z

86

Dynamical Constraints on Disk Masses  

E-Print Network [OSTI]

While the total interior mass of a galaxy is reasonably well determined by a good rotation curve, the relative contributions from disk, bulge and halo are only weakly constrained by one-dimensional data. Barred galaxies are intrinsically more complicated, but provide much tighter constraints on the disk masses and support the idea that most of the mass in the inner parts of bright galaxies is in their stars. There appears to be no systematic difference in dark matter content between barred and unbarred galaxies, consistent with the theoretical result that the global stability of galaxies with dense centers does not depend on their halo fraction. The rotation curve shapes of lower luminosity and low-surface-brightness galaxies, on the other hand, indicate significant mass in the DM halo even near their centers. We find that most DM halos appear to have large cores, inconsistent with the predictions from cosmological simulations. We also show that such large-core halos can result from compression by disk infall of physically reasonable initial halos. Maximum disks, while apparently required by the data, do seem to present some puzzles; most notably they re-open the old disk-halo ``conspiracy'' issue and incorrectly predict that surface brightness should be a second parameter in the Tully-Fisher relation.

J. A. Sellwood

1999-03-11T23:59:59.000Z

87

Baryon oscillations and dark-energy constraints from imaging surveys  

Science Journals Connector (OSTI)

......oscillations and dark-energy constraints from imaging surveys Derek Dolney 1...the dependence of dark-energy constraints on survey depth and area...the dependence of dark-energy constraints on survey area. While the......

Derek Dolney; Bhuvnesh Jain; Masahiro Takada

2006-03-01T23:59:59.000Z

88

A geometric approach for early power grid verification using current constraints  

E-Print Network [OSTI]

A geometric approach for early power grid verification using current constraints Imad A. Ferzli Automation Eindhoven, The Netherlands lars@magma-da.com ABSTRACT The verification of power grids in modern programs as there are power grid nodes, to an- other involving a user-limited number of solutions of one

Najm, Farid N.

89

Cloud tomography: Role of constraints and a new algorithm Dong Huang,1  

E-Print Network [OSTI]

Cloud tomography: Role of constraints and a new algorithm Dong Huang,1 Yangang Liu,1 and Warren 2008. [1] Retrieving spatial distributions of cloud liquid water content from limited-angle emission data (passive microwave cloud tomography) is ill-posed, and a small inaccuracy in the data and

90

INTEGRATED ORBIT AND ATTITUDE CONTROL FOR A NANOSATELLITE WITH POWER CONSTRAINTS  

E-Print Network [OSTI]

AAS 03-100 INTEGRATED ORBIT AND ATTITUDE CONTROL FOR A NANOSATELLITE WITH POWER CONSTRAINTS Bo J. Naasz, Matthew M. Berry, Hye-Young Kim, and Christopher D. Hall§ Small satellites tend to be power as with other subsystems for limited electrical power. The Virginia Tech nanosatellite project, HokieSat, must

Hall, Christopher D.

91

CONSTRAINT EFFECT IN FRACTURE WHAT IS IT  

SciTech Connect (OSTI)

The meaning of the phrase 'constraint effect in fracture' has changed in the past two decades from 'contained plasticity' to a broader description of 'dependence of fracture toughness value on geometry of test specimen or structure'. This paper will first elucidate the fundamental mechanics reasons for the apparent 'constraint effects in fracture', followed by outlining a straightforward approach to overcoming this problem in both brittle (elastic) and ductile (elastic-plastic) fracture. It is concluded by discussing the major difference in constraint effect on fracture event in elastic and elastic-plastic materials.

Lam, P; Prof. Yuh J. Chao, P

2008-10-29T23:59:59.000Z

92

vol. 155, no. 2 the american naturalist february 2000 Energy, Density, and Constraints to Species Richness: Ant  

E-Print Network [OSTI]

. This supports the energy limitation hypothesis' assumption that average population densities are highervol. 155, no. 2 the american naturalist february 2000 Energy, Density, and Constraints to Species in a given time and space. The energy limitation hy- pothesis links the species richness of consumer taxa

Kaspari, Mike

93

Constraint of DNA on Functionalized Graphene Improves Its Biostability...  

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

Constraint of DNA on Functionalized Graphene Improves Its Biostability and Specificity. Constraint of DNA on Functionalized Graphene Improves Its Biostability and Specificity....

94

New limits for neutrinoless tau decays  

E-Print Network [OSTI]

double beta decays, neutrino oscillations, Z!l11l22 decays, and other rare pro- cesses. In particular, there are strict limits on muon neutrino- less decays: B(m!eg),4.9310211 and B(m!eee),2.4 310212 at 90% confidence level @18#. However, lepton num- ber... particles and on the new coupling constants. The most optimistic branching fraction predictions are at the level of about 1026. Constraints on lepton flavor violation come from studies of rare and forbidden K , p, and m decays, e-m conversions, neutrinoless...

Ammar, Raymond G.; Baringer, Philip S.; Bean, Alice; Besson, David Zeke; Coppage, Don; Darling, C.; Davis, Robin E. P.; Kotov, S.; Kravchenko, I.; Kwak, Nowhan; Zhou, L.

1998-05-01T23:59:59.000Z

95

Double Beta Decay Constraint on Composite Neutrinos  

Science Journals Connector (OSTI)

......Constraint on Composite Neutrinos Eiichi Takasugi Department of Physics, Osaka University, Toyonaka 560 Neutrinoless double beta decay (betabeta)0v occurs through the magnetic coupling of dimension five operator whose coupling constant is......

Eiichi Takasugi

1997-10-01T23:59:59.000Z

96

Multiple Vehicle Routing Problem with Fuel Constraints  

E-Print Network [OSTI]

In this paper, a Multiple Vehicle Routing Problem with Fuel Constraints (MVRPFC) is considered. This problem consists of a field of targets to be visited, and a collection of vehicles with fuel tanks that may visit the targets. Consideration...

Levy, David

2013-06-26T23:59:59.000Z

97

The Design of Shape from Motion Constraints  

E-Print Network [OSTI]

This report presents a set of representations methodologies and tools for the purpose of visualizing, analyzing and designing functional shapes in terms of constraints on motion. The core of the research is an interactive ...

Caine, Michael E.

1993-09-01T23:59:59.000Z

98

LANSCE beam current limiter  

SciTech Connect (OSTI)

The Radiation Security System (RSS) at the Los Alamos Neutron Science Center (LANSCE) provides personnel protection from prompt radiation due to accelerated beam. Active instrumentation, such as the Beam Current Limiter, is a component of the RSS. The current limiter is designed to limit the average current in a beam line below a specific level, thus minimizing the maximum current available for a beam spill accident. The beam current limiter is a self-contained, electrically isolated toroidal beam transformer which continuously monitors beam current. It is designed as fail-safe instrumentation. The design philosophy, hardware design, operation, and limitations of the device are described.

Gallegos, F.R.

1996-06-01T23:59:59.000Z

99

Sensitivity of galaxy cluster dark energy constraints to halo modeling uncertainties  

Science Journals Connector (OSTI)

We perform a sensitivity study of dark energy (DE) constraints from galaxy cluster surveys to uncertainties in the halo mass function, bias, and the mass-observable relation. For a set of idealized surveys, we evaluate cosmological constraints as priors on 16 nuisance parameters in the halo modeling are varied. We find that surveys with a higher mass limit are more sensitive to mass-observable uncertainties while surveys with low mass limits that probe more of the mass-function shape and evolution are more sensitive to mass-function errors. We examine the correlations among nuisance and cosmological parameters. Mass-function parameters are strongly positively (negatively) correlated with ?DE (w). For the mass-observable parameters, ?DE is most sensitive to the normalization and its redshift evolution while w is more sensitive to redshift evolution in the variance. While survey performance is limited mainly by mass-observable uncertainties, the current level of mass-function error is responsible for up to a factor of 2 degradation in ideal cosmological constraints. For surveys that probe to low masses (1013.5h-1M?), even percent-level constraints on model nuisance parameters result in a degradation of ?2 (2) on ?DE (w) relative to perfect knowledge.

Carlos E. Cunha and August E. Evrard

2010-04-08T23:59:59.000Z

100

How energy conservation limits our measurements  

E-Print Network [OSTI]

Observations in Quantum Mechanics are subject to complex restrictions arising from the principle of energy conservation. Determining such restrictions, however, has been so far an elusive task, and only partial results are known. In this paper we discuss how constraints on the energy spectrum of a measurement device translate into limitations on the measurements which we can effect on a target system with non-trivial energy operator. We provide efficient algorithms to characterize such limitations and we quantify them exactly when the target is a two-level quantum system. Our work thus identifies the boundaries between what is possible or impossible to measure, i.e., between what we can see or not, when energy conservation is at stake.

Miguel Navascues; Sandu Popescu

2012-11-09T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Limited Test Ban Treaty  

National Nuclear Security Administration (NNSA)

Detection System (USNDS), which monitors compliance with the international Limited Test Ban Treaty (LTBT). The LTBT, signed by 108 countries, prohibits nuclear testing in the...

102

Restricting query relaxation through user constraints  

SciTech Connect (OSTI)

This paper describes techniques to restrict and to heuristically control relaxation of deductive database queries. The process of query relaxation provides a user with a means to automatically identify new queries that are related to the user`s original query. However, for large databases, many relaxations may be possible. The methods to control and restrict the relaxation process introduced in this paper focus the relaxation process and make it more efficient. User restrictions over the data base domain may be expressed as user constraints. This paper describes how user constraints can restrict relaxed queries. Also, a set of heuristics based on cooperative answering techniques are presented for controlling the relaxation process. Finally, the interaction of the methods for relaxing queries, processing user constraints, and applying the heuristic rules is described.

Gaasterland, T.

1993-07-01T23:59:59.000Z

103

Electromagnetic field with constraints and Papapetrou equation  

E-Print Network [OSTI]

It is shown that geometric optical description of electromagnetic wave with account of its polarization in curved space-time can be obtained straightforwardly from the classical variational principle for electromagnetic field. For this end the entire functional space of electromagnetic fields must be reduced to its subspace of locally plane monochromatic waves. We have formulated the constraints under which the entire functional space of electromagnetic fields reduces to its subspace of locally plane monochromatic waves. These constraints introduce variables of another kind which specify a field of local frames associated to the wave and contain some congruence of null-curves. The Lagrangian for constrained electromagnetic field contains variables of two kinds, namely, a congruence of null-curves and the field itself. This yields two kinds of Euler-Lagrange equations. Equations of first kind are trivial due to the constraints imposed. Variation of the curves yields the Papapetrou equations for a classical massless particle with helicity 1.

Z. Ya. Turakulov; A. T. Muminov

2006-01-12T23:59:59.000Z

104

Design constraints on Cherenkov telescopes with Davies-Cotton reflectors  

E-Print Network [OSTI]

This paper discusses the construction of high-performance ground-based gamma-ray Cherenkov telescopes with a Davies-Cotton reflector. For the design of such telescopes, usually physics constrains the field-of-view, while the photo-sensor size is defined by limited options. Including the effect of light-concentrators in front of the photo sensor, it is demonstrated that these constraints are enough to mutually constrain all other design parameters. The dependability of the various design parameters naturally arises once a relationship between the value of the point-spread functions at the edge of the field-of-view and the pixel field-of-view is introduced. To be able to include this constraint into a system of equations, an analytical description for the point-spread function of a tessellated Davies-Cotton reflector is derived from Taylor developments and ray-tracing simulations. Including higher order terms renders the result precise on the percent level. Design curves are provided within the typical phase sp...

Bretz, Thomas

2013-01-01T23:59:59.000Z

105

Dark Matter Constraints from a Cosmic Index of Refraction  

E-Print Network [OSTI]

The dark-matter candidates of particle physics invariably possess electromagnetic interactions, if only via quantum fluctuations. Taken en masse, dark matter can thus engender an index of refraction which deviates from its vacuum value. Its presence is signaled through frequency-dependent effects: the real part yields dispersive effects in propagation, and the imaginary part yields such in attenuation. We discuss theoretical constraints on the expansion of the index of refraction with frequency, the physical interpretation of the terms, and the particular observations needed to isolate its coefficients. This, with the advent of new opportunities to view gamma-ray bursts at cosmological distance scales, gives us a new probe of dark matter. As a first application we use the time delay determined from radio afterglow observations of gamma-ray bursts to limit the charge-to-mass ratio of dark matter to |\\epsilon/M|< 1.8 x 10^{-5}/eV at 95% CL.

Gardner, S

2009-01-01T23:59:59.000Z

106

New Constraint on Open Cold-Dark-Matter Models  

E-Print Network [OSTI]

We calculate the large-angle cross-correlation between the cosmic-microwave-background (CMB) temperature and the x-ray-background (XRB) intensity expected in an open Universe with cold dark matter (CDM) and a nearly scale-invariant spectrum of adiabatic density perturbations. Results are presented as a function of the nonrelativistic-matter density $\\Omega_0$ (in units of the critical density) and the x-ray bias $b_x$ (evaluated at a redshift $z\\simeq1$ in evolving-bias models) for both an open Universe and a flat cosmological-constant Universe. Recent experimental upper limits to the amplitude of this cross-correlation provide a new constraint to the $\\Omega_0$-$b_x$ parameter space that open-CDM models (and the open-inflation models that produce them) must satisfy.

Ali Kinkhabwala; Marc Kamionkowski

1999-05-03T23:59:59.000Z

107

LHC constraints on gauge boson couplings to dark matter  

E-Print Network [OSTI]

Collider searches for energetic particles recoiling against missing transverse energy allow to place strong bounds on the interactions between dark matter (DM) and standard model particles. In this article we update and extend LHC constraints on effective dimension-7 operators involving DM and electroweak gauge bosons. A concise comparison of the sensitivity of the mono-photon, mono-W, mono-Z, mono-W/Z, invisible Higgs-boson decays in the vector boson fusion mode and the mono-jet channel is presented. Depending on the parameter choices, either the mono-photon or the mono-jet data provide the most stringent bounds at the moment. We furthermore explore the potential of improving the current 8 TeV limits at 14 TeV. Future strategies capable of disentangling the effects of the different effective operators involving electroweak gauge bosons are discussed as well.

Crivellin, Andreas; Hibbs, Anthony

2015-01-01T23:59:59.000Z

108

The Copenhagen Accord for limiting global warming: Criteria, constraints, and available avenues  

Science Journals Connector (OSTI)

...mitigation efforts must start with diesel fuel (57). Fortunately, regenerative filters for diesel vehicles that reduce BC emissions...52) are available in the market and are in use. The situation is different...emissions from heavy-duty diesel vehicles equipped with diesel...

Veerabhadran Ramanathan; Yangyang Xu

2010-01-01T23:59:59.000Z

109

Power dissipation limits have emerged as a major constraint in the design  

E-Print Network [OSTI]

. At the low end of the per­ formance spectrum, namely in the world of handheld and portable devices or systems, power has always dominated over perfor­ mance (execution time) as the primary design issue. Battery life the approach of using energy­enabled performance simulators in early design. We examine some of the emerg­ ing

Martonosi, Margaret

110

Power dissipation limits have emerged as a major constraint in the design  

E-Print Network [OSTI]

. At the low end of the per- formance spectrum, namely in the world of handheld and portable devices or systems, power has always dominated over perfor- mance (execution time) as the primary design issue. Battery life the approach of using energy-enabled performance simulators in early design. We examine some of the emerg- ing

Martonosi, Margaret

111

Technical constraints limiting application of enhanced oil recovery techniques to petroleum production in the United States  

SciTech Connect (OSTI)

A cost-shared program was initiated in 1974 to accelerate the application of advanced EOR processes. An incentive program was also announced in 1979 for the commercialization of EOR techniques. This report provides a summary of the EOR state-of-the-art and draws upon the data base developed thus far. A critical review of four major cost-shared chemical projects is included. Chemical recovery, miscible recovery, and thermal recovery techniques are covered. The FY 1979 DOE EOR program is summarized in a table. (DLC)

Not Available

1980-09-01T23:59:59.000Z

112

Type II Seesaw Higgsology and LEP/LHC constraints  

E-Print Network [OSTI]

In the {\\sl type II seesaw} model, if spontaneous violation of the lepton number conservation prevails over that of explicit violation, a rich Higgs sector phenomenology is expected to arise with light scalar states having mixed charged-fermiophobic/neutrinophilic properties. We study the constraints on these light CP-even ($h^0$) and CP-odd ($A^0$) states from LEP exclusion limits, combined with the so far established limits and properties of the $125-126$~GeV ${\\cal H}$ boson discovered at the LHC. We show that, apart from a fine-tuned region of the parameter space, masses in the $\\sim 44$ to $80$ GeV range escape from the LEP limits if the vacuum expectation value of the Higgs triplet is $\\lesssim {\\cal O}(10^{-3})$GeV, that is comfortably in the region for 'natural' generation of Majorana neutrino masses within this model. In the lower part of the scalar mass spectrum the decay channels ${\\cal H} \\to h^0 h^0, A^0 A^0$ lead predominantly to heavy flavor plus missing energy or to totally invisible Higgs dec...

Arhrib, Abdesslam; Moultaka, Gilbert; Rahili, Larbi

2014-01-01T23:59:59.000Z

113

Optical limiting materials  

DOE Patents [OSTI]

Optical limiting materials. Methanofullerenes, fulleroids and/or other fullerenes chemically altered for enhanced solubility, in liquid solution, and in solid blends with transparent glass (SiO.sub.2) gels or polymers, or semiconducting (conjugated) polymers, are shown to be useful as optical limiters (optical surge protectors). The nonlinear absorption is tunable such that the energy transmitted through such blends saturates at high input energy per pulse over a wide range of wavelengths from 400-1100 nm by selecting the host material for its absorption wavelength and ability to transfer the absorbed energy into the optical limiting composition dissolved therein. This phenomenon should be generalizable to other compositions than substituted fullerenes.

McBranch, Duncan W. (Santa Fe, NM); Mattes, Benjamin R. (Santa Fe, NM); Koskelo, Aaron C. (Los Alamos, NM); Heeger, Alan J. (Santa Barbara, CA); Robinson, Jeanne M. (Los Alamos, NM); Smilowitz, Laura B. (Los Alamos, NM); Klimov, Victor I. (Los Alamos, NM); Cha, Myoungsik (Goleta, CA); Sariciftci, N. Serdar (Santa Barbara, CA); Hummelen, Jan C. (Groningen, NL)

1998-01-01T23:59:59.000Z

114

Binding (or Cohesive) Energy Denition and Constraints  

E-Print Network [OSTI]

Binding (or Cohesive) Energy Denition and Constraints The binding or cohesive energy cof a substance (either liquid or solid) is the energy required to break all the bonds associated with one of its constituent molecules. It is, therefore a measure of the inter-molecular energy for a substance. We spend time

Nimmo, Francis

115

SYNTHESIS: MODELING VARIABILITY AND CONSTRAINTS Rolf Carlson  

E-Print Network [OSTI]

SYNTHESIS: MODELING VARIABILITY AND CONSTRAINTS Rolf Carlson This is a modified version. Abstract This paper discusses some important topics in current speech synthesis research. Modeling of speaker characteristics and emotions are used as a examples of new trends in the speech synthesis field

Carlson, Rolf

116

Infrastructure Constraints in New England Background Memo  

Broader source: Energy.gov [DOE]

On Monday, April 21, 2014 the U.S. Department of Energy (DOE), acting in its capacity as the Secretariat for the QER Task Force, will convene a two-part public meeting to examine energy infrastructure constraints in New England and regional approaches to addressing them.

117

Prioritisation of test suites containing precedence constraints  

E-Print Network [OSTI]

1 Prioritisation of test suites containing precedence constraints Tim Miller Department@unimelb.edu.au Abstract--Test case prioritisation is the process of ordering the exe- cution of test cases to achieve a certain goal, such as increasing the rate of fault detection. Many existing test case prioritisation

Miller, Tim

118

Constraint Satisfaction Problems Frank C. Langbein  

E-Print Network [OSTI]

Science Cardiff University 13th February 2001 #12;Constraint Satisfaction Problems (CSPs) · A CSP #12;A Geometric CSP, . . . · Parallel planes: nt 1n2 = 1, . . . Elements of the CSP: · Variables: nl S2 (unit sphere), pl R · Domains

Camacho, David

119

Synthesised Constraint Models for Distributed Energy Management  

E-Print Network [OSTI]

for optimisation have been widely ignored ­ a gap we aim to close. As a by-product, we give a formulation of warmSynthesised Constraint Models for Distributed Energy Management Alexander Schiendorfer, Jan frequently encountered in energy management systems such as the coordination of power generators in a virtual

Reif, Wolfgang

120

Thunderstriking Constraints with JUPITER Christos Kloukinas  

E-Print Network [OSTI]

, response jitter, memory, energy consumption, QoS, depend- ability, etc. Unfortunately, we are still lackingThunderstriking Constraints with JUPITER Christos Kloukinas City University Department of Computing Northampton Sq., London EC1V 0HB, U.K. C.Kloukinas(at)soi.city.ac.uk Abstract We present JUPITER, a tool

Weyde, Tillman

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Constraints on Resonant Dark Matter Annihilation  

E-Print Network [OSTI]

by PAMELA and FERMI satellites. In this thesis, we analyze a class of models which allow for dark matter to annihilate through an s-channel resonance. Our analysis takes into account constraints from thermal relic abundance and the recent measurements...

Backovic, Mihailo

2011-07-04T23:59:59.000Z

122

Transforming and Refining Abstract Constraint Specifications  

E-Print Network [OSTI]

Transforming and Refining Abstract Constraint Specifications Alan M. Frisch1 , Brahim Hnich2 , Ian choose model transformations to reduce greatly the amount of effort that is required to solve a problem by systematic search. It is a consid- erable challenge to automate such transformations. A problem may be viewed

Walsh, Toby

123

Limited Commercial Maintenance (LCLM) Limited Lawn & Ornamental (LLO)  

E-Print Network [OSTI]

, Limited Commercial Landscape Maintenance, Ornamental & Turf, Private Ag, or General Standards CORE for Limited Commercial Landscape Maintenance (LCLM), you must attend all day to earn the 6 CEUs required. Limited Commercial Maintenance (LCLM) Limited Lawn & Ornamental (LLO) Training & Exams Date

Florida, University of

124

Magnetic and Electric Dipole Constraints on Extra Dimensions and Magnetic Fluxes  

E-Print Network [OSTI]

The propagation of charged particles and gauge fields in a compact extra dimension contributes to $g-2$ of the charged particles. In addition, a magnetic flux threading this extra dimension generates an electric dipole moment for these particles. We present constraints on the compactification size and on the possible magnetic flux imposed by the comparison of data and theory of the magnetic moment of the muon and from limits on the electric dipole moments of the muon, neutron and electron.

Aaron J. Roy; Myron Bander

2008-05-10T23:59:59.000Z

125

Sets of Symmetry Breaking Constraints Barbara M. Smith  

E-Print Network [OSTI]

Sets of Symmetry Breaking Constraints Barbara M. Smith Cork Constraint Computation Centre, University College Cork, Ireland b.m.smith@4c.ucc.ie Abstract [Puget, 2004] has shown that if the symmetry

Smith, Barbara M.

126

Threshold Boolean form for joint probabilistic constraints with ...  

E-Print Network [OSTI]

Jan 2, 2015 ... probabilistic constraints with random technology matrix”. James Luedtke ?. Department of Industrial and Systems Engineering. University of ...

2015-01-02T23:59:59.000Z

127

Flow shop scheduling with peak power consumption constraints  

E-Print Network [OSTI]

Mar 29, 2012 ... Flow shop scheduling with peak power consumption constraints ... Keywords: scheduling, flow shop, energy, peak power consumption, integer ...

K. Fang

2012-03-29T23:59:59.000Z

128

Chemical Constraints on the Water and Total Oxygen Abundances in the Deep Atmosphere of Saturn  

E-Print Network [OSTI]

Thermochemical equilibrium and kinetic calculations for the trace gases CO, PH3, and SiH4 give three independent constraints on the water and total oxygen abundances of Saturn's deep atmosphere. A lower limit to the water abundance of H2O/H2 > 1.7 x 10^-3 is given by CO chemistry while an upper limit of H2O/H2 < 5.5 x 10^-3 is given by PH3 chemistry. A combination of the CO and PH3 constraints indicates a water enrichment on Saturn of 1.9 to 6.1 times the solar system abundance (H2O/H2 = 8.96 x 10^-4). The total oxygen abundance must be at least 1.7 times the solar system abundance (O/H2 = 1.16 x 10^-3) in order for the SiH4 to remain below a detection limit of SiH4/H2 < 2 x 10^-10. A combination of the CO, PH3, and SiH4 constraints suggests that the total oxygen abundance on Saturn is 3.2 to 6.4 times the solar system abundance. Our results indicate that oxygen on Saturn is less enriched than other heavy elements (such as C and P) relative to a solar system composition. This work was supported by NASA NAG5-11958.

Channon Visscher; Bruce Fegley Jr

2005-01-07T23:59:59.000Z

129

Elementary Model of Constraint Quantization with an Anomaly  

E-Print Network [OSTI]

Quantum gravity is made more difficult in part by its constraint structure. The constraints are classically first-class; however, upon quantization they become partially second-class. To study such behavior, we focus on a simple problem with finitely many degrees of freedom and demonstrate how the projection operator formalism for dealing with quantum constraints is well suited to this type of example.

J. Scott Little; John R. Klauder

2005-02-10T23:59:59.000Z

130

Lifetime-Aware Intrusion Detection under Safeguarding Constraints  

E-Print Network [OSTI]

Lifetime-Aware Intrusion Detection under Safeguarding Constraints Ali Iranli, Hanif Fatemi, Massoud in whereby first the safeguarding constraints are satisfied and then the scheduling problem is solved Detection under Safeguarding constraint (IDS) is the version of the problem that we are interested to extend

Pedram, Massoud

131

Castor: Using Constraint Programming to Solve SPARQL Queries  

E-Print Network [OSTI]

. 1 Constraint Programming A Constraint Satisfaction Problem (CSP) is a triple (X,D,C) where X of values that can be assigned to x, and C is a set of constraints. A solution to a CSP is an assignment. The root node of the tree is the initial CSP. The children of a node are smaller CSPs such that the union

Deville, Yves

132

Utility Maximization Under a Shortfall Risk Constraint Anne Gundel  

E-Print Network [OSTI]

in order to make a position acceptable from a risk management perspective. Second, a risk measure shouldUtility Maximization Under a Shortfall Risk Constraint Anne Gundel Humboldt-Universit¨at zu Berlin-time financial market model under a joint budget and downside risk constraint. The risk constraint is given

GrĂĽbel, Rudolf

133

Security Clearances; Limitations  

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

SEC. 1072. SECURITY CLEARANCES; LIMITATIONS. SEC. 1072. SECURITY CLEARANCES; LIMITATIONS. (a) In General.-Title III of the Intelligence Reform and Terrorism Prevention Act of 2004 (50 U.S.C. 435b) is amended by adding at the end the following new section: "SEC. 3002. SECURITY CLEARANCES; LIMITATIONS. "(a) Definitions.-In this section: "(1) Controlled substance.-The term `controlled substance' has the meaning given that term in section 102 of the Controlled Substances Act (21 U.S.C. 802). "(2) Covered person.-The term `covered person' means- "(A) an officer or employee of a Federal agency; "(B) a member of the Army, Navy, Air Force, or Marine Corps who is on active duty or is in an active status; and "(C) an officer or employee of a contractor of a Federal agency.

134

Urban Parks: Constraints on Park Visitation  

E-Print Network [OSTI]

in a Recreation research shows that there are marked inequalities among population groups in terms of their participation in different leisure activities and their use of local, regional and national park and recre- ation services. Those who do... studies focused primarily on factors that are physical and external to the individual, such as disabilities or lack of facilities. But there are also intrapersonal constraints, which have to do with people?s personality needs, prior socialization...

Scott, David

2006-12-19T23:59:59.000Z

135

Solar system constraints on Rindler acceleration  

E-Print Network [OSTI]

We discuss the classical tests of general relativity in the presence of Rindler acceleration. Among these tests the perihelion shifts give the tightest constraints and indicate that the Pioneer anomaly cannot be caused by a universal solar system Rindler acceleration. We address potential caveats for massive test-objects. Our tightest bound on Rindler acceleration that comes with no caveats is derived from radar echo delay and yields |a|<3nm/s^2.

Sante Carloni; Daniel Grumiller; Florian Preis

2011-05-09T23:59:59.000Z

136

Dark Energy Constraints from Baryon Acoustic Oscillations  

Science Journals Connector (OSTI)

Baryon acoustic oscillations (BAOs) in the galaxy power spectrum allow us to extract the scale of the comoving sound horizon at recombination, a cosmological standard ruler accurately determined by the cosmic microwave background anisotropy data. We examine various issues important in the use of BAOs to probe dark energy. We find that if we assume a flat universe and priors on ?m, ?mh2, and ?bh2 as expected from the Planck mission, the constraints on dark energy parameters (w0, w') scale much less steeply with survey area than (area)-1/2 for a given redshift range. The constraints on the dark energy density ?X(z), however, do scale roughly with (area)-1/2 due to the strong correlation between H(z) and ?m (which reduces the effect of priors on ?m). Dark energy constraints from BAOs are very sensitive to the assumed linear scale of matter clustering and the redshift accuracy of the survey. For a BAO survey with 0.5 ? z ? 2, ? (R) = 0.4 [corresponding to kmax (z = 0) = 0.086 h Mpc-1], and ?z/ (1 + z) = 0.001, we find = (0.115,0.183) and (0.069, 0.104) for survey areas of 1000 and 10,000 deg2, respectively. We find that it is critical to minimize the bias in the scale estimates in order to derive reliable dark energy constraints. For a 1000 (10,000) deg2 BAO survey, a 1 ? bias in ln H (z) leads to a 2 ? (3 ?) bias in w'. The bias in w' due to the same scale bias from ln DA (z) is slightly smaller and opposite in sign. The results from this paper will be useful in assessing different proposed BAO surveys and guiding the design of optimal dark energy detection strategies.

Yun Wang

2006-01-01T23:59:59.000Z

137

Constraints on Supersymmetric Flavour Models from b->s gamma  

E-Print Network [OSTI]

We consider the effects of departures from minimal flavour violations (MFV) in the context of CMSSM-like theories. Second and third generation off-diagonal elements in the Yukawa, sfermion, and trilinear mass matrices are taken to be non-zero at the GUT scale. These are run down together with MSSM parameters to the electroweak scale. We apply constraints from fermion masses and CKM matrix elements to limit the range of the new free parameters of the model. We determine the effect of the departure from MFV on the branching ratio of b->s gamma. We find that only when the expansion parameter in the down-squark sector is relatively large there is a noticeable effect, which tends to relax the lower limit from b->s gamma on the universal gaugino mass. We also find that the expansion parameter associated with the slepton sector needs to be smaller than the corresponding parameter in the down-squark sector in order to be compliant with the bound imposed by the branching ratio of tau-> mu gamma.

Olive, Keith A

2008-01-01T23:59:59.000Z

138

Chemical Enrichment RGS cluster sample (CHEERS): Constraints on turbulence  

E-Print Network [OSTI]

Feedback from AGN, galactic mergers, and sloshing are thought to give rise to turbulence, which may prevent cooling in clusters. We aim to measure the turbulence in clusters of galaxies and compare the measurements to some of their structural and evolutionary properties. It is possible to measure the turbulence of the hot gas in clusters by estimating the velocity widths of their X-ray emission lines. The RGS Spectrometers aboard XMM-Newton are currently the only instruments provided with sufficient effective area and spectral resolution in this energy domain. We benefited from excellent 1.6Ms new data provided by the CHEERS project. The new observations improve the quality of the archival data and allow us to place constraints for some clusters, which were not accessible in previous work. One-half of the sample shows upper limits on turbulence less than 500km/s. For several sources, our data are consistent with relatively strong turbulence with upper limits on the velocity widths that are larger than 1000km/...

Pinto, Ciro; Werner, Norbert; de Plaa, Jelle; Fabian, Andrew C; Zhang, Yu-Ying; Kaastra, Jelle S; Finoguenov, Alexis; Ahoranta, Jussi

2015-01-01T23:59:59.000Z

139

Heat flux limiting sleeves  

DOE Patents [OSTI]

A heat limiting tubular sleeve extending over only a portion of a tube having a generally uniform outside diameter, the sleeve being open on both ends, having one end thereof larger in diameter than the other end thereof and having a wall thickness which decreases in the same direction as the diameter of the sleeve decreases so that the heat transfer through the sleeve and tube is less adjacent the large diameter end of the sleeve than adjacent the other end thereof.

Harris, William G. (Tampa, FL)

1985-01-01T23:59:59.000Z

140

Controlling the bullwhip with transport capacity constraints  

Science Journals Connector (OSTI)

The bullwhip effect can be costly to companies in terms of capacity-on costs and stock-out costs. This paper examines the possibilities for controlling the bullwhip effect with transport capacity management in the supply chain. The goal is to examine how inventories and service levels react to transport capacity constraints in a simulated supply chain that is prone to the bullwhip effect. By controlling the transport capacities, the companies may be able to reduce the impacts of demand amplification and inventory variations. Thus, there may be significant practical implications of the findings for logistics managers in today's volatile business environments.

Jouni Juntunen; Jari Juga

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

A Generalization of Generalized Arc Consistency: From Constraint Satisfaction to Constraint-Based Inference  

E-Print Network [OSTI]

-binary classic con- straint satisfaction problems (CSPs). Based on the Semiring CSP and Valued CSP frameworks CSP, probabilistic CSP, max CSP, and weighted CSP. This extension is based on an idempotent satisfaction problem (CSP), local consistency can be characterized as deriving new constraints based on local

Mackworth, Alan K.

142

A Schema for Constraint Relaxation with Instantiations for Partial Constraint Satisfaction and Schedule Optimization  

E-Print Network [OSTI]

(CSPs) 7 1.3.1 The CSP Model 7 1.3.2 CSP Algorithms 8 1.3.2.1 Retrospective Techniques 8 1.1 Probabilistic Labeling in Machine Vision 15 2.2 Non-Satisfaction of Constraints By Weight 16 2.3 Extending CSP

Fox, Mark S.

143

Big bang nucleosynthesis constraints on hadronically and electromagnetically decaying relic neutral particles  

Science Journals Connector (OSTI)

Big bang nucleosynthesis in the presence of decaying relic neutral particles is examined in detail. All nonthermal processes important for the determination of light-element abundance yields of H2, H3, He3, He4, Li6, and Li7 are coupled to the thermonuclear fusion reactions to obtain comparatively accurate results. Predicted light-element yields are compared to observationally inferred limits on primordial light-element abundances to infer constraints on the abundances and properties of relic decaying particles with decay times in the interval 0.01??sec??X?1012??sec. Decaying particles are typically constrained at early times by He4 or H2, at intermediate times by Li6, and at large times by the He3/H2 ratio. Constraints are shown for a large number of hadronic branching ratios and decaying particle masses and may be applied to constrain the evolution of the early universe.

Karsten Jedamzik

2006-11-08T23:59:59.000Z

144

Energy Efficiency in the Low-SNR Regime under Queueing Constraints and Channel Uncertainty  

E-Print Network [OSTI]

Energy efficiency of fixed-rate transmissions is studied in the presence of queueing constraints and channel uncertainty. It is assumed that neither the transmitter nor the receiver has channel side information prior to transmission. The channel coefficients are estimated at the receiver via minimum mean-square-error (MMSE) estimation with the aid of training symbols. It is further assumed that the system operates under statistical queueing constraints in the form of limitations on buffer violation probabilities. The optimal fraction of power allocated to training is identified. Spectral efficiency--bit energy tradeoff is analyzed in the low-power and wideband regimes by employing the effective capacity formulation. In particular, it is shown that the bit energy increases without bound in the low-power regime as the average power vanishes. A similar conclusion is reached in the wideband regime if the number of noninteracting subchannels grow without bound with increasing bandwidth. On the other hand, it is pr...

Qiao, Deli; Velipasalar, Senem

2009-01-01T23:59:59.000Z

145

Energy Efficiency of Fixed-Rate Wireless Transmissions under Queueing Constraints and Channel Uncertainty  

E-Print Network [OSTI]

Energy efficiency of fixed-rate transmissions is studied in the presence of queueing constraints and channel uncertainty. It is assumed that neither the transmitter nor the receiver has channel side information prior to transmission. The channel coefficients are estimated at the receiver via minimum mean-square-error (MMSE) estimation with the aid of training symbols. It is further assumed that the system operates under statistical queueing constraints in the form of limitations on buffer violation probabilities. The optimal fraction of of power allocated to training is identified. Spectral efficiency--bit energy tradeoff is analyzed in the low-power and wideband regimes by employing the effective capacity formulation. In particular, it is shown that the bit energy increases without bound in the low-power regime as the average power vanishes. On the other hand, it is proven that the bit energy diminishes to its minimum value in the wideband regime as the available bandwidth increases. For this case, expressio...

Qiao, Deli; Velipasalar, Senem

2009-01-01T23:59:59.000Z

146

Cosmological Constraints on the Higgs Boson Mass  

Science Journals Connector (OSTI)

For a robust interpretation of upcoming observations from PLANCK and Large Hadron Collider experiments it is imperative to understand how the inflationary dynamics of a non-minimally coupled Higgs scalar field with gravity may affect the determination of the inflationary observables. We make a full proper analysis of the Wilkinson Microwave Anisotropy Probe, Type Ia supernova distance-redshift relation, and the baryon acoustic oscillations data sets in a context of the non-minimally coupled Higgs inflation field with gravity. For the central value of the top quark pole mass mT = 171.3 GeV, the fit of the inflation model with a non-minimally coupled Higgs scalar field leads to a Higgs boson mass in the range 143.7 GeV ? mH ? 167 GeV (95% CL). We show that the inflation driven by a non-minimally coupled scalar field to the Einstein gravity leads to significant constraints on the scalar spectral index nS and the tensor-to-scalar ratio R when compared with a tensor with similar constraints to form the standard inflation with a minimally coupled scalar field. We also show that an accurate reconstruction of the Higgs potential in terms of inflationary observables requires an improved accuracy of other parameters of the standard model of particle physics such as the top quark mass and the effective QCD coupling constant.

L. A. Popa; A. Caramete

2010-01-01T23:59:59.000Z

147

Astrophysical constraints on millicharged atomic dark matter  

E-Print Network [OSTI]

Some models of inelastic dark matter posit the existence of bound states under some new $U(1)'$ gauge symmetry. If this new dark photon kinetically mixes with the standard model photon, then the constituent particles in these bound states can acquire a fractional electric charge. This electric charge renders a dark-matter medium dispersive. We compute this frequency-dependent index of refraction for such a medium and use the frequency-dependent arrival time of light from astrophysical sources to constrain the properties of dark atoms in the medium. Using optical-wavelength observations from the Crab Pulsar, we find the electric millicharge of dark (electrons) protons to be smaller than the electric charge $e$ for dark atom masses below 100 keV, assuming a dark fine structure constant $\\boldsymbol{\\alpha}=1$. We estimate that future broadband observations of gamma-ray bursts can produce constraints on the millicharge of dark atoms with masses in the keV range that are competitive with existing collider constraints.

Audrey K. Kvam; David C. Latimer

2014-12-01T23:59:59.000Z

148

The limits of intelligence in design  

SciTech Connect (OSTI)

A new, comprehensive design theory is presented, applicable to all design domains such as engineering and industrial design, architecture, city and regional planning, and, in general, any goal-oriented activity that involves decision making. The design process is analyzed into fundamental activities that are characterized with respect to the nature of knowledge requirements and the degree to which they can be specified and delegated to others, in general, and to computers in particular. The characterization of design problems as ``wicked,`` or ``ill-defined,`` design has been understood as a rational activity, that is ``thinking before acting.`` The new theory presented in this paper suggests that design is ``thinking and feeling while acting,`` supporting the position that design is only partially rational. Intelligence, ``natural`` or ``artificial,`` is only one of two requirements for design, the other being emotions. Design decisions are only partially inferred, that is, they are not entirely the product of reasoning. Rather, design decisions are based on judgment that requires the notion of ``good`` and ``bad,`` which is attributed to feelings, rather than thoughts. The presentation of the design theory extends to the implications associated with the limits of intelligence in design, which, in turn, become constraints on the potential role of computers in design. Many of the current development efforts in computer-aided design violate these constraints, especially in the implementation of expert systems and multi-criterion evaluation models. These violations are identified and discussed in detail. Finally, specific areas for further research and development in computer-aided design are presented and discussed.

Papamichael, K. [Lawrence Berkeley Lab., CA (United States); Protzen, J.P. [California Univ., Berkeley, CA (United States). Dept. of Architecture

1993-05-01T23:59:59.000Z

149

Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data  

E-Print Network [OSTI]

Updated constraints on dark matter cross section and mass are presented combining CMB power spectrum measurements from Planck, WMAP9, ACT, and SPT as well as several low-redshift datasets (BAO, HST, supernovae). For the CMB datasets, we combine WMAP9 temperature and polarization data for l 2500, and Planck CMB four-point lensing measurements. We allow for redshift-dependent energy deposition from dark matter annihilation by using a `universal' energy absorption curve. We also include an updated treatment of the excitation, heating, and ionization energy fractions, and provide updated deposition efficiency factors (f_eff) for 41 different dark matter models. Assuming perfect energy deposition (f_eff = 1) and a thermal cross section, dark matter masses below 26 GeV are excluded at the 2-sigma level. Assuming a more generic efficiency of f_eff = 0.2, thermal dark matter masses below 5 GeV are disfavored at the 2-sigma level. These limits are a factor of ~2 improvement over those from WMAP9 data alone. These current constraints probe, but do not exclude, dark matter as an explanation for reported anomalous indirect detection observations from AMS-02/PAMELA and the Fermi Gamma-ray Inner Galaxy data. They also probe relevant models that would explain anomalous direct detection events from CDMS, CRESST, CoGeNT, and DAMA, as originating from a generic thermal WIMP. Projected constraints from the full Planck release should improve the current limits by another factor of ~2, but will not definitely probe these signals. The proposed CMB Stage IV experiment will more decisively explore the relevant regions and improve upon the Planck constraints by another factor of ~2.

Mathew S. Madhavacheril; Neelima Sehgal; Tracy R. Slatyer

2014-11-28T23:59:59.000Z

150

Analyze Constraint Behavior to Discover Hidden Value in your Process  

E-Print Network [OSTI]

of data to the database. Several EMS Reports are generated daily by the MSAccess application. These include: Power Boiler Control Constraints 4200 kPa Header Optimizer Constraints 1150 kPa Header Optimization Constraints 450 kPa Header..., British Columbia. AAI designed advanced regulatory controls to improve boiler operation along with a supervisory control system to optimize overall powerhouse efficiency and facilitate improved decision-making. Supervisory controls and advanced process...

Morrison, R.; Moore, D.

2004-01-01T23:59:59.000Z

151

Fault Current Limiters  

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

Fault Fault Current Limiters Superconducting & Solid-state Power Equipment Office of Electricity Delivery and Energy Reliability www.oe.energy.gov Office of Electricity Delivery and Energy Reliability, OE-1 U.S. Department of Energy - 1000 Independence Avenue, SW - Washington, DC 20585 Plugging America Into the Future of Power What are FCLs? A fault is an unintentional short circuit, or partial short-circuit, in an electric circuit. A variety of factors such as lightning, downed power lines, or crossed power lines cause faults. During a fault, excessive current-called fault current- flows through the electrical system often resulting in a failure of one section of that system by causing a

152

The Constant Rank Condition and Second Order Constraint ...  

E-Print Network [OSTI]

Nov 13, 2009 ... The Constant Rank condition for feasible points of nonlinear ... stant Rank condition is, in addition, a second order constraint qualification.

2009-11-13T23:59:59.000Z

153

Soft Constraints for Quality Aspects in Service Oriented Architectures  

E-Print Network [OSTI]

We propose the use of Soft Constraints as a natural way to model Service Oriented Architecture. In the framework, constraints are used to model components and connectors and constraint aggregation is used to represent their interactions. The "quality of a service" is measured and considered when performing queries to service providers. Some examples consist in the levels of cost, performance and availability required by clients. In our framework, the QoS scores are represented by the softness level of the constraint and the measure of complex (web) services is computed by combining the levels of the components.

Bistarelli, Stefano; 10.4204/EPTCS.2.5

2009-01-01T23:59:59.000Z

154

Geologic and thermochronologic constraints on the initial orientation...  

Open Energy Info (EERE)

footwall shear zone Jump to: navigation, search OpenEI Reference LibraryAdd to library Conference Proceedings: Geologic and thermochronologic constraints on the initial...

155

An approach to initial constraints in general relativity  

E-Print Network [OSTI]

We present a 2+1 decomposition of the momentum constraint in vacuum. In some cases, e.g. under the assumption of analyticity, this constraint can be solved by quadrature. Given a solution with the vanishing mean curvature $H$ the conformal method can be used to solve the Hamiltonian constraint. We show how to obtain in this way initial data with a marginally outer trapped surface. We also shortly discuss an alternative approach, in which the full system of constraints reduces to two real equations for two functions.

Tafel, Jacek

2014-01-01T23:59:59.000Z

156

An approach to initial constraints in general relativity  

E-Print Network [OSTI]

We present a 2+1 decomposition of the momentum constraint in vacuum. In some cases, e.g. under the assumption of analyticity, this constraint can be solved by quadrature. Given a solution with the vanishing mean curvature $H$ the conformal method can be used to solve the Hamiltonian constraint. We show how to obtain in this way initial data with a marginally outer trapped surface. We also shortly discuss an alternative approach, in which the full system of constraints reduces to two real equations for two functions.

Jacek Tafel

2014-05-06T23:59:59.000Z

157

A note on unbounded on/off constraints  

E-Print Network [OSTI]

involving decision variables which represent step counters in an abstract computer ... behind this work was inspired by indicator constraints appearing in large ...

H. Hijazi, L. Liberti

2014-11-12T23:59:59.000Z

158

Handling Nonnegative Constraints in Spectral Estimation Abstract 1 ...  

E-Print Network [OSTI]

Abstract. We consider convex optimization problems with the. constraint that the variables form a ... component of this work in other works, must be obtained from.

159

Experimental demonstration of information to energy conversion in a quantum system at the Landauer Limit  

E-Print Network [OSTI]

Landauer's principle sets fundamental thermodynamic constraints for classical and quantum information processing. Here we measure, for the first time, the heat dissipated in elementary quantum logic gates, at the Landauer limit, implemented in a Nuclear Magnetic Resonance system. This allows for the detailed study of irreversible entropy production in quantum information processors.

John P. P. Silva; Roberto S. Sarthour; Alexandre M. Souza; Ivan S. Oliveira; John Goold; Kavan Modi; Diogo O. Soares-Pinto; Lucas C. Céleri

2014-12-23T23:59:59.000Z

160

Neutrino constraints on the dark matter total annihilation cross section  

SciTech Connect (OSTI)

In the indirect detection of dark matter through its annihilation products, the signals depend on the square of the dark matter density, making precise knowledge of the distribution of dark matter in the Universe critical for robust predictions. Many studies have focused on regions where the dark matter density is greatest, e.g., the galactic center, as well as on the cosmic signal arising from all halos in the Universe. We focus on the signal arising from the whole Milky Way halo; this is less sensitive to uncertainties in the dark matter distribution, and especially for flatter profiles, this halo signal is larger than the cosmic signal. We illustrate this by considering a dark matter model in which the principal annihilation products are neutrinos. Since neutrinos are the least detectable standard model particles, a limit on their flux conservatively bounds the dark matter total self-annihilation cross section from above. By using the Milky Way halo signal, we show that previous constraints using the cosmic signal can be improved on by 1-2 orders of magnitude; dedicated experimental analyses should be able to improve both by an additional 1-2 orders of magnitude.

Yueksel, Hasan [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Horiuchi, Shunsaku [Department of Physics, School of Science, University of Tokyo, Tokyo 113-0033 (Japan); Beacom, John F. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Department of Astronomy, Ohio State University, Columbus, Ohio 43210 (United States); Ando, Shin'ichiro [California Institute of Technology, Mail Code 130-33, Pasadena, California 91125 (United States)

2007-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Constraints on flow regimes in wide-aperture fractures  

SciTech Connect (OSTI)

In recent years, significant advances have been made in our understanding of the complex flow processes in individual fractures, aided by flow visualization experiments and conceptual modeling efforts. These advances have led to the recognition of several flow regimes in individual fractures subjected to different initial and boundary conditions. Of these, the most important regimes are film flow, rivulet flow, and sliding of droplets. The existence of such significantly dissimilar flow regimes has been a major hindrance in the development of self-consistent conceptual models of flow for single fractures that encompass all the flow regimes. The objective of this study is to delineate the existence of the different flow regimes in individual fractures. For steady-state flow conditions, we developed physical constraints on the different flow regimes that satisfy minimum energy configurations, which enabled us to segregate the wide range of fracture transmissivity (volumetric flow rate per fracture width) into several flow regimes. These are, in increasing order of flow rate, flow of adsorbed films, flow of sliding drops, rivulet flow, stable film flow, and unstable (turbulent) film flow. The scope of this study is limited to wide-aperture fractures with the flow on the opposing sides of fracture being independent.

Ghezzehei, Teamrat A.

2004-02-28T23:59:59.000Z

162

Hadronic EDM Constraints on Orbifold GUTs  

E-Print Network [OSTI]

We point out that the null results of the hadronic electric dipole moment (EDM) searches constrain orbifold grand unified theories (GUTs), where the GUT symmetry and supersymmetry (SUSY) are both broken by boundary conditions in extra dimensions and it leads to rich fermion and sfermion flavor structures. A marginal chromoelectric dipole moment (CEDM) of the up quark is induced by the misalignment between the CP violating left- and right-handed up-type squark mixings, in contrast to the conventional four-dimensional SUSY GUTs. The up quark CEDM constraint is found to be as strong as those from charged lepton flavor violation (LFV) searches. The interplay between future EDM and LFV experiments will probe the structures of the GUTs and the SUSY breaking mediation mechanism.

Junji Hisano; Mitsuru Kakizaki; Minoru Nagai

2005-05-27T23:59:59.000Z

163

Constraints on topological order in Mott Insulators  

E-Print Network [OSTI]

We point out certain symmetry induced constraints on topological order in Mott Insulators (quantum magnets with an odd number of spin $\\tfrac{1}{2}$ per unit cell). We show, for example, that the double semion topological order is incompatible with time reversal and translation symmetry in Mott insulators. This sharpens the Hastings-Oshikawa-Lieb-Schultz-Mattis theorem for 2D quantum magnets, which guarantees that a fully symmetric gapped Mott insulator must be topologically ordered, but is silent on which topological order is permitted. An application of our result is the Kagome lattice quantum antiferromagnet where recent numerical calculations of entanglement entropy indicate a ground state compatible with either toric code or double semion topological order. Our result rules out the latter possibility.

Michael P. Zaletel; Ashvin Vishwanath

2014-10-10T23:59:59.000Z

164

A Landscape Analysis of Constraint Satisfaction Problems  

E-Print Network [OSTI]

We discuss an analysis of Constraint Satisfaction problems, such as Sphere Packing, K-SAT and Graph Coloring, in terms of an effective energy landscape. Several intriguing geometrical properties of the solution space become in this light familiar in terms of the well-studied ones of rugged (glassy) energy landscapes. A `benchmark' algorithm naturally suggested by this construction finds solutions in polynomial time up to a point beyond the `clustering' and in some cases even the `thermodynamic' transitions. This point has a simple geometric meaning and can be in principle determined with standard Statistical Mechanical methods, thus pushing the analytic bound up to which problems are guaranteed to be easy. We illustrate this for the graph three and four-coloring problem. For Packing problems the present discussion allows to better characterize the `J-point', proposed as a systematic definition of Random Close Packing, and to place it in the context of other theories of glasses.

Florent Krzakala; Jorge Kurchan

2007-06-18T23:59:59.000Z

165

MODELING OBSERVATIONAL CONSTRAINTS FOR DARK MATTER HALOS  

SciTech Connect (OSTI)

Observations show that the underlying rotation curves at intermediate radii in spiral and low-surface-brightness galaxies are nearly universal. Further, in these same galaxies, the product of the central density and the core radius ({rho}{sub 0} r{sub 0}) is constant. An empirically motivated model for dark matter halos that incorporates these observational constraints is presented and shown to be in accord with the observations. A model fit to the observations of the galaxy cluster A611 shows that {rho}{sub 0} r{sub 0} for the dark matter halo in this more massive structure is larger by a factor of {approx}20 over that assumed for the galaxies. The model maintains the successful Navarro-Frenk-White form in the outer regions, although the well-defined differences in the inner regions suggest that modifications to the standard cold dark matter picture are required.

Hartwick, F. D. A. [Department of Physics and Astronomy, University of Victoria, Victoria, BC V8W 3P6 (Canada)

2012-12-01T23:59:59.000Z

166

FED pumped limiter configuration issues  

SciTech Connect (OSTI)

Impurity control in the Fusion Engineering Device (FED) is provided by a toroidal belt pumped limiter. Limiter design issues addressed in this paper are (1) poloidal location of the limiter belt, (2) shape of the limiter surface facing the plasma, and (3) whether the belt is pumped from one or both sides. The criteria used for evaluation of limiter configuration features were sensitivity to plasma-edge conditions and ease of maintenance and fabrication. The evaluation resulted in the selection of a baseline FED limiter that is located at the bottom of the device and has a flat surface with a single leading edge.

Haines, J.R.; Fuller, G.M.

1983-01-01T23:59:59.000Z

167

New axion and hidden photon constraints from a solar data global fit  

E-Print Network [OSTI]

We present a new statistical analysis that combines helioseismology (sound speed, surface helium and convective radius) and solar neutrino observations (boron and beryllium fluxes) to place upper limits to the properties of non standard weakly interacting particles. Our analysis includes theoretical and observational errors, accounts for tensions between input parameters of solar models and can be easily extended to include other observational constraints. We present two applications to test the method: the well studied case of axions and axion-like particles and the more novel case of low mass hidden photons. For axions we obtain an upper limit at 3 sigma for the axion-photon coupling constant of g_a-gamma < 4 x 10^-10 GeV^-1. For hidden photons we obtain the most restrictive upper limit for the product of the kinetic mixing and mass of chi < 1.82 x 10^-12 eV/m at 3 sigma. Both cases improve the previous solar constraints based on the Standard Solar Models showing the power of our global statistical ap...

Vinyoles, Núria; Villante, Francesco L; Basu, Sarbani; Redondo, Javier; Isern, Jordi

2015-01-01T23:59:59.000Z

168

Strong Upper Limits on Sterile Neutrino Warm Dark Matter  

SciTech Connect (OSTI)

Sterile neutrinos are attractive dark matter candidates. Their parameter space of mass and mixing angle has not yet been fully tested despite intensive efforts that exploit their gravitational clustering properties and radiative decays. We use the limits on gamma-ray line emission from the Galactic center region obtained with the SPI spectrometer on the INTEGRAL satellite to set new constraints, which improve on the earlier bounds on mixing by more than 2 orders of magnitude, and thus strongly restrict a wide and interesting range of models.

Yueksel, Hasan [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Beacom, John F. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Department of Astronomy, Ohio State University, Columbus, Ohio 43210 (United States); Watson, Casey R. [Department of Physics and Astronomy, Millikin University, Decatur, Illinois 62522 (United States)

2008-09-19T23:59:59.000Z

169

Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling  

E-Print Network [OSTI]

Periodic Constraint-Based Control Using Dynamic Wireless Sensor Scheduling James Weimer, Jos´e Ara´ujo, Aitor Hernandez and Karl Henrik Johansson Abstract-- Constraint-based control over wireless sensor net- works (WSNs) require control strategies that achieve a desired closed-loop system performance while

Johansson, Karl Henrik

170

Constraint-based Scheduling Markus P.J. Fromherz  

E-Print Network [OSTI]

such as product assembly se- quencing. This makes constraint-based scheduling interesting to the control community planning, scheduling, and control tasks. This tutorial gives a brief introduction to constraint and reconfigurable con- trol, and the integration of various planning, scheduling, and control tasks

Fromherz, Markus P.J.

171

Thermal Unit Commitment Including Optimal AC Power Flow Constraints  

E-Print Network [OSTI]

iteration to another. The complexity of a given iteration becomes linear in the number of generators instead of the coupling between generator time- spanning constraints and system-wide instantaneous constraints, suers from combinatoric complexity as the number of generators increases. It is this feature that dooms

172

Optimal lifetime consumption and investment under drawdown constraint  

E-Print Network [OSTI]

Optimal lifetime consumption and investment under drawdown constraint Romuald Elie Nizar Touzi consumption-investment problem under the drawdown constraint, i.e. the wealth process never falls below in explicit form, and we derive closed-form expressions for the optimal consumption and investment strategy

Touzi, Nizar

173

Improving Cost Calculations for Global Constraints in Local Search  

E-Print Network [OSTI]

Improving Cost Calculations for Global Constraints in Local Search Markus Bohlin Swedish Institute- straint satisfaction is based on local minimization of a cost function, which is usually the number equivalent to a set of basic constraints but still contributes as little to the cost as a single basic

Rossi, Francesca

174

Capital Expenditures, Financial Constraints, and the Use of Options  

E-Print Network [OSTI]

Capital Expenditures, Financial Constraints, and the Use of Options Tim Adam RMI Working Paper No@nus.edu.sg 1 #12;Capital Expenditures, Financial Constraints, and the Use of Options Abstract This paper of the author and do not necessarily reflect the views of NUS Risk Management Institute (RMI). #12;Capital

Chaudhuri, Sanjay

175

Structural Modelling of Financial Constraints on Investment: Where Do We  

E-Print Network [OSTI]

Structural Modelling of Financial Constraints on Investment: Where Do We Stand? Jean tests of investment facing financial constraints, to their link with firms data and asset prices the interpretation of the sensitivity of investment to liquidity variables such as cash flow as a measure

Paris-Sud XI, Université de

176

Asymptotic Solutions of Hamilton-Jacobi Equations with State Constraints  

SciTech Connect (OSTI)

We study Hamilton-Jacobi equations in a bounded domain with the state constraint boundary condition. We establish a general convergence result for viscosity solutions of the Cauchy problem for Hamilton-Jacobi equations with the state constraint boundary condition to asymptotic solutions as time goes to infinity.

Mitake, Hiroyoshi [Waseda University, Department of Pure and Applied Mathematics (Japan)], E-mail: take_take_hiro2@akane.waseda.jp

2008-12-15T23:59:59.000Z

177

A Meeting Scheduling System Based on Open Constraint Programming  

E-Print Network [OSTI]

- ences can be programmed using the OCP reactors language. CLP is suitable to be used in meetingA Meeting Scheduling System Based on Open Constraint Programming Kenny Qili Zhu and Andrew E a meeting scheduling system based on open constraint programming (OCP) paradigm. OCP is an extension

Zhu, Kenny Q.

178

A Toolkit for Constraint Management in Heterogeneous Information Systems \\Lambda  

E-Print Network [OSTI]

to monitor and enforce distributed integrity constraints in loosely coupled heterogeneous information systems in such environments. Our framework is used to describe (1) interfaces provided by a database for the data items integrity constraints over data that is stored in a collec­ tion of loosely coupled heterogeneous

Chawathe, Sudarshan S.

179

Constraints on Nucleon Decay via Invisible Modes from the Sudbury Neutrino Observatory  

Science Journals Connector (OSTI)

Data from the Sudbury Neutrino Observatory have been used to constrain the lifetime for nucleon decay to “invisible” modes, such as n?3?. The analysis was based on a search for ? rays from the deexcitation of the residual nucleus that would result from the disappearance of either a proton or neutron from O16. A limit of ?inv>2×1029??yr is obtained at 90% confidence for either neutron- or proton-decay modes. This is about an order of magnitude more stringent than previous constraints on invisible proton-decay modes and 400 times more stringent than similar neutron modes.

S. N. Ahmed et al. (SNO Collaboration)

2004-03-10T23:59:59.000Z

180

WiggleZ Dark Energy Survey: Cosmological neutrino mass constraint from blue high-redshift galaxies  

Science Journals Connector (OSTI)

The absolute neutrino mass scale is currently unknown, but can be constrained by cosmology. The WiggleZ high redshift, star-forming, and blue galaxy sample offers a complementary data set to previous surveys for performing these measurements, with potentially different systematics from nonlinear structure formation, redshift-space distortions, and galaxy bias. We obtain a limit of ?m?<0.60??eV (95% confidence) for WiggleZ+Wilkinson?Microwave?Anisotropy?Probe. Combining with priors on the Hubble parameter and the baryon acoustic oscillation scale gives ?m?<0.29??eV, which is the strongest neutrino mass constraint derived from spectroscopic galaxy redshift surveys.

Signe Riemer–Sřrensen et al.

2012-04-23T23:59:59.000Z

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


181

Constraint on Quantum Gravitational Well in Noncommutative Space  

E-Print Network [OSTI]

In two-dimensional noncommutive space for the case of both position-position and momentum-momentum noncommuting, the constraint between noncommutative parameters on the quantum gravitational well is investigated. The related topic of guaranteeing Bose-Einstein statistics in the general case are elucidated: Bose-Einstein statistics is guaranteed by the deformed Heisenberg-Weyl algebra itself, independent of dynamics. A special feature of a dynamical system is represented by a constraint between noncommutative parameters. Such a constraint is fixed by dynamical considerations. The general feature of the constraint is a direct proportionality between noncommutative parameters with a coefficient composed by a product of characteristic parameters of the considered system. The constraint on the quantum gravitational well is obtained, and is applied to estimate the upper bound of the momentum-momentum noncommutative parameter from the experimental upper bound of the position-position noncommutative parameter.

Jian-Zu Zhang

2005-08-23T23:59:59.000Z

182

Cosmological Constraints on Strongly Coupled Moduli from Cosmic Strings  

E-Print Network [OSTI]

Cosmological constraints on moduli, whose coupling to matter is stronger than Planck mass suppressed coupling, are derived. In particular, moduli are considered to be produced by oscillating loops of cosmic strings and constraints are obtained from their effects on big bang nucleosynthesis and their contribution to diffuse gamma ray background and dark matter. Large volume and warped Type-IIB flux compactifications are taken as examples where strongly coupled moduli are present. Finally, the constraints on cosmic string tension, modulus mass and modulus coupling constant are obtained and it is shown that the constraints are relaxed significantly when the coupling constant is large enough. In addition, the effects of thermal production of moduli are considered and the corresponding constraints are derived.

Eray Sabancilar

2009-10-29T23:59:59.000Z

183

New Constraints on Cosmic Polarization Rotation from B-Mode Polarization in Cosmic Microwave Background  

E-Print Network [OSTI]

STPpol, POLARBEAR and BICEP2 have recently measured the cosmic microwave background (CMB) B-mode polarization in various sky regions of several tens of square degrees and obtained BB power spectra in the multipole range 20-3000, detecting the components due to gravitational lensing and to inflationary gravitational waves. We analyze jointly the results of these three experiments and propose modifications of their analysis of the spectra to include in the model, in addition to the gravitational lensing and the inflationary gravitational waves components, also the effects induced by the cosmic polarization rotation (CPR), if it exists within current upper limits. Although in principle our analysis would lead also to new constraints on CPR, in practice these can only be given on its fluctuations , since constraints on its mean angle are inhibited by the de-rotation which is applied by current CMB polarization experiments, in order to cope with the insufficient calibration of the polarization angle. The combined data fits from all three experiments (with 29% CPR-SPTpol correlation, depending on theoretical model) gives constraint ^1/2 areas observed by SPTpol, POLARBEAR and BICEP2.

Sperello di Serego Alighieri; Wei-Tou Ni; Wei-Ping Pan

2014-04-07T23:59:59.000Z

184

Alliance fights limits on chlorofluorocarbons  

Science Journals Connector (OSTI)

Alliance fights limits on chlorofluorocarbons ... Efforts by the nascent Alliance for Responsible CFC Policy to curb the Environmental Protection Agency's plans to put more limits on chlorofluorocarbons are beginning to have results. ... The 400-member alliance was formed last August to fight EPA's avowed intention to limit production of CFC's in the U.S. to 30% of their present levels. ...

1981-03-02T23:59:59.000Z

185

China's Coal: Demand, Constraints, and Externalities  

SciTech Connect (OSTI)

This study analyzes China's coal industry by focusing on four related areas. First, data are reviewed to identify the major drivers of historical and future coal demand. Second, resource constraints and transport bottlenecks are analyzed to evaluate demand and growth scenarios. The third area assesses the physical requirements of substituting coal demand growth with other primary energy forms. Finally, the study examines the carbon- and environmental implications of China's past and future coal consumption. There are three sections that address these areas by identifying particular characteristics of China's coal industry, quantifying factors driving demand, and analyzing supply scenarios: (1) reviews the range of Chinese and international estimates of remaining coal reserves and resources as well as key characteristics of China's coal industry including historical production, resource requirements, and prices; (2) quantifies the largest drivers of coal usage to produce a bottom-up reference projection of 2025 coal demand; and (3) analyzes coal supply constraints, substitution options, and environmental externalities. Finally, the last section presents conclusions on the role of coal in China's ongoing energy and economic development. China has been, is, and will continue to be a coal-powered economy. In 2007 Chinese coal production contained more energy than total Middle Eastern oil production. The rapid growth of coal demand after 2001 created supply strains and bottlenecks that raise questions about sustainability. Urbanization, heavy industrial growth, and increasing per-capita income are the primary interrelated drivers of rising coal usage. In 2007, the power sector, iron and steel, and cement production accounted for 66% of coal consumption. Power generation is becoming more efficient, but even extensive roll-out of the highest efficiency units would save only 14% of projected 2025 coal demand for the power sector. A new wedge of future coal consumption is likely to come from the burgeoning coal-liquefaction and chemicals industries. If coal to chemicals capacity reaches 70 million tonnes and coal-to-liquids capacity reaches 60 million tonnes, coal feedstock requirements would add an additional 450 million tonnes by 2025. Even with more efficient growth among these drivers, China's annual coal demand is expected to reach 3.9 to 4.3 billion tonnes by 2025. Central government support for nuclear and renewable energy has not reversed China's growing dependence on coal for primary energy. Substitution is a matter of scale: offsetting one year of recent coal demand growth of 200 million tonnes would require 107 billion cubic meters of natural gas (compared to 2007 growth of 13 BCM), 48 GW of nuclear (compared to 2007 growth of 2 GW), or 86 GW of hydropower capacity (compared to 2007 growth of 16 GW). Ongoing dependence on coal reduces China's ability to mitigate carbon dioxide emissions growth. If coal demand remains on a high growth path, carbon dioxide emissions from coal combustion alone would exceed total US energy-related carbon emissions by 2010. Within China's coal-dominated energy system, domestic transportation has emerged as the largest bottleneck for coal industry growth and is likely to remain a constraint to further expansion. China has a low proportion of high-quality reserves, but is producing its best coal first. Declining quality will further strain production and transport capacity. Furthermore, transporting coal to users has overloaded the train system and dramatically increased truck use, raising transportation oil demand. Growing international imports have helped to offset domestic transport bottlenecks. In the long term, import demand is likely to exceed 200 million tonnes by 2025, significantly impacting regional markets.

Aden, Nathaniel; Fridley, David; Zheng, Nina

2009-07-01T23:59:59.000Z

186

Timber Products Equipment Services MarketPlace  

E-Print Network [OSTI]

. The 400-acre tract already includes a biomass power plant that Ainsworth used to generate its own power Development Corporation (IEDC) purchased the 400,000 square foot plant and out buildings. In the space of just by 8 feet long stack of wood One board foot equals one board 1 foot wide by 1 foot long by 1 inch thick

187

Constraints on Scalar-Field Dark Energy from the Cosmic Lens All-Sky Survey Gravitational Lens Statistics  

E-Print Network [OSTI]

We use the statistics of strong gravitational lensing based on the Cosmic Lens All-Sky Survey (CLASS) data to constrain cosmological parameters in a spatially-flat, inverse power-law potential energy density, scalar-field dark energy cosmological model. The lensing-based constraints are consistent with, but weaker than, those derived from Type Ia supernova redshift-magnitude data, and mildly favor the Einstein cosmological constant limit of this dark energy model.

Kyu-Hyun Chae; Gang Chen; Bharat Ratra; Dong-Wook Lee

2004-03-10T23:59:59.000Z

188

Impact of leaf motion constraints on IMAT plan quality, deliver accuracy, and efficiency  

SciTech Connect (OSTI)

Purpose: Intensity modulated arc therapy (IMAT) is a radiation therapy delivery technique that combines the efficiency of arc based delivery with the dose painting capabilities of intensity modulated radiation therapy (IMRT). A key challenge in developing robust inverse planning solutions for IMAT is the need to account for the connectivity of the beam shapes as the gantry rotates from one beam angle to the next. To overcome this challenge, inverse planning solutions typically impose a leaf motion constraint that defines the maximum distance a multileaf collimator (MLC) leaf can travel between adjacent control points. The leaf motion constraint ensures the deliverability of the optimized plan, but it also impacts the plan quality, the delivery accuracy, and the delivery efficiency. In this work, the authors have studied leaf motion constraints in detail and have developed recommendations for optimizing the balance between plan quality and delivery efficiency. Methods: Two steps were used to generate optimized IMAT treatment plans. The first was the direct machine parameter optimization (DMPO) inverse planning module in the Pinnacle{sup 3} planning system. Then, a home-grown arc sequencer was applied to convert the optimized intensity maps into deliverable IMAT arcs. IMAT leaf motion constraints were imposed using limits of between 1 and 30 mm/deg. Dose distributions were calculated using the convolution/superposition algorithm in the Pinnacle{sup 3} planning system. The IMAT plan dose calculation accuracy was examined using a finer sampling calculation and the quality assurance verification. All plans were delivered on an Elekta Synergy with an 80-leaf MLC and were verified using an IBA MatriXX 2D ion chamber array inserted in a MultiCube solid water phantom. Results: The use of a more restrictive leaf motion constraint (less than 1-2 mm/deg) results in inferior plan quality. A less restrictive leaf motion constraint (greater than 5 mm/deg) results in improved plan quality but can lead to less accurate dose distribution as evidenced by increasing discrepancies between the planned and the delivered doses. For example, the results from our patient-specific quality assurance measurements demonstrated that the average gamma analysis passing rate decreased from 98% to 80% when the allowable leaf motion increased from 3 to 20 mm/deg. Larger leaf motion constraints also led to longer treatment delivery times (2 to 4 folds) due to the additional MLC leaf motion. Conclusions: Leaf motion constraints significantly impact IMAT plans in terms of plan quality, delivery accuracy, and delivery efficiency with the impact magnified for more complex cases. Our studies indicate that a leaf motion constraint of 2 to 3 mm/deg of gantry rotation can provide an optimal balance between plan quality, delivery accuracy, and efficiency.

Chen Fan; Rao Min; Ye Jinsong; Shepard, David M.; Cao Daliang [Swedish Cancer Institute, 1221 Madison Street, A-Floor East, Seattle, Washington 98104 (United States)

2011-11-15T23:59:59.000Z

189

Observational constraints to a unified cosmological model  

E-Print Network [OSTI]

We propose a phenomenological unified model for dark matter and dark energy based on an equation of state parameter $w$ that scales with the $\\arctan$ of the redshift. The free parameters of the model are three constants: $\\Omega_{b0}$, $\\alpha$ and $\\beta$. Parameter $\\alpha$ dictates the transition rate between the matter dominated era and the accelerated expansion period. The ratio $\\beta / \\alpha$ gives the redshift of the equivalence between both regimes. Cosmological parameters are fixed by observational data from Primordial Nucleosynthesis (PN), Supernovae of the type Ia (SNIa), Gamma-Ray Bursts (GRB) and Baryon Acoustic Oscillations (BAO). The calibration of the 138 GRBs events is performed using the 580 SNIa of the Union2.1 data set and a new set of 79 high-redshift GRBs is obtained. The various sets of data are used in different combinations to constraint the parameters through statistical analysis. The unified model is compared to the $\\Lambda$CDM model and their differences are emphasized.

Cuzinatto, R R; de Morais, E M

2014-01-01T23:59:59.000Z

190

Astrophysical constraints on millicharged atomic dark matter  

E-Print Network [OSTI]

Some models of inelastic dark matter posit the existence of bound states under some new $U(1)'$ gauge symmetry. If this new dark photon kinetically mixes with the standard model photon, then the constituent particles in these bound states can acquire a fractional electric charge. This electric charge renders a dark-matter medium dispersive. We compute this frequency-dependent index of refraction for such a medium and use the frequency-dependent arrival time of light from astrophysical sources to constrain the properties of dark atoms in the medium. Using optical-wavelength observations from the Crab Pulsar, we find the electric millicharge of dark (electrons) protons to be smaller than the electric charge $e$ for dark atom masses below 100 keV, assuming a dark fine structure constant $\\boldsymbol{\\alpha}=1$. We estimate that future broadband observations of gamma-ray bursts can produce constraints on the millicharge of dark atoms with masses in the keV range that are competitive with existing collider constra...

Kvam, Audrey K

2014-01-01T23:59:59.000Z

191

CMB constraints on light dark matter candidates  

E-Print Network [OSTI]

Unveiling the nature of cosmic dark matter is an urgent issue in cosmology. Here we make use of a strategy based on the search for the imprints left on the CMB temperature and polarization spectra by the energy deposition due to annihilations of the most promising dark matter candidate, a stable WIMP of mass 1-20 GeV. A major improvement with respect to previous similar studies is a detailed treatment of the annihilation cascade and its energy deposition in the cosmic gas. This is vital as this quantity is degenerate with the annihilation cross-section . The strongest constraints are obtained from Monte Carlo Markov Chains analysis of the combined WMAP7 and SPT datasets up to lmax = 3100. If annihilation occurs via the e+e- channel, a light WIMP can be excluded at 2-{\\sigma} c.l. as a viable DM candidate in the above mass range. However, if annihilation occurs via {\\mu}+{\\mu}- or {\\tau}+{\\tau}- channels instead we find that WIMPs with mass > 5 GeV might represent a viable cosmological DM candidate. We compare...

Evoli, Carmelo; Ferrara, Andrea

2012-01-01T23:59:59.000Z

192

Theory of constraints and outsourcing decisions  

Science Journals Connector (OSTI)

A new management philosophy, named the theory of constraints (TOC), has changed thinking about production and operations management. According to this philosophy the particular company's goal is ''to make money now and in the future''. At the very top level financial analysis, measures like profits, profitability and cash flow could be used to conclude if the organisation has moved closer to its goal. However, at the other levels of organisation, TOC uses three different performance measures to ensure its goal: 1) throughput 2) investment and 3) operating expense. Applications of these three different performance measures are called throughput accounting, which has been seen in most instances as opposite to conventional and more developed management accounting approaches (e.g. activity based costing). In this paper, we firstly demonstrate the product mix decision based on conventional management approaches and TOC. This hypothetical example is later enlarged to consider outsourcing also. Both of these examples reveal the same conclusions a conventional management approach will give inadequate results, if profit is the measure of success.

Olli-Pekka Hilmola

2001-01-01T23:59:59.000Z

193

Observational constraints on patch inflation in noncommutative spacetime  

SciTech Connect (OSTI)

We study constraints on a number of patch inflationary models in noncommutative spacetime using a compilation of recent high-precision observational data. In particular, the four-dimensional general relativistic (GR) case, the Randall-Sundrum (RS), and the Gauss-Bonnet brane world scenarios are investigated by extending previous commutative analyses to the infrared limit of a maximally symmetric realization of the stringy uncertainty principle. The effect of spacetime noncommutativity modifies the standard consistency relation between the tensor spectral index and the tensor-to-scalar ratio. We perform likelihood analyses in terms of inflationary observables using new consistency relations and confront them with large-field inflationary models with potential V{proportional_to}{phi}{sup p} in two classes of noncommutative scenarios. We find a number of interesting results: (i) the quartic potential (p=4) is rescued from marginal rejection in the class 2 GR case, and (ii) steep inflation driven by an exponential potential (p{yields}{infinity}) is allowed in the class 1 RS case. Spacetime noncommutativity can lead to blue-tilted scalar and tensor spectra even for monomial potentials, thus opening up a possibility to explain the loss of power observed in cosmic microwave background anisotropies. We also explore patch inflation with a Dirac-Born-Infeld tachyon field and explicitly show that the associated likelihood analysis is equivalent to the one in the ordinary scalar field case by using horizon-flow parameters. It turns out that tachyon inflation is compatible with observations in all patch cosmologies even for large p.

Calcagni, Gianluca [Dipartimento di Fisica, Universita di Parma, Parco Area delle Scienze 7/A, I-43100 Parma (Italy); INFN-Gruppo collegato di Parma, Parco Area delle Scienze 7/A, I-43100 Parma (Italy); Tsujikawa, Shinji [Department of Physics, Gunma National College of Technology, Gunma 371-8530 (Japan)

2004-11-15T23:59:59.000Z

194

A Dichotomy for 2-Constraint Forbidden CSP Patterns  

E-Print Network [OSTI]

Although the CSP (constraint satisfaction problem) is NP-complete, even in the case when all constraints are binary, certain classes of instances are tractable. We study classes of instances defined by excluding subproblems. This approach has recently led to the discovery of novel tractable classes. The complete characterisation of all tractable classes defined by forbidding patterns (where a pattern is simply a compact representation of a set of subproblems) is a challenging problem. We demonstrate a dichotomy in the case of forbidden patterns consisting of either one or two constraints. This has allowed us to discover new tractable classes including, for example, a novel generalisation of 2SAT.

Cooper, Martin C

2012-01-01T23:59:59.000Z

195

The WiggleZ Dark Energy Survey: Cosmological neutrino mass constraint from blue high-redshift galaxies  

E-Print Network [OSTI]

The absolute neutrino mass scale is currently unknown, but can be constrained from cosmology. The WiggleZ high redshift star-forming blue galaxy sample is less sensitive to systematics from non-linear structure formation, redshift-space distortions and galaxy bias than previous surveys. We obtain a upper limit on the sum of neutrino masses of 0.60eV (95% confidence) for WiggleZ+Wilkinson Microwave Anisotropy Probe. Combining with priors on the Hubble Parameter and the baryon acoustic oscillation scale gives an upper limit of 0.29eV, which is the strongest neutrino mass constraint derived from spectroscopic galaxy redshift surveys.

Signe Riemer-Sřrensen; Chris Blake; David Parkinson; Tamara M. Davis; Sarah Brough; Matthew Colless; Carlos Contreras; Warrick Couch; Scott Croom; Darren Croton; Michael J. Drinkwater; Karl Forster; David Gilbank; Mike Gladders; Karl Glazebrook; Ben Jelliffe; Russell J. Jurek; I-hui Li; Barry Madore; D. Christopher Martin; Kevin Pimbblet; Gregory B. Poole; Michael Pracy; Rob Sharp; Emily Wisnioski; David Woods; Ted K. Wyder; H. K. C. Yee

2011-12-21T23:59:59.000Z

196

Constraints on Cosmic Strings from the LIGO-Virgo Gravitational-Wave Detectors  

Science Journals Connector (OSTI)

Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from cosmic string cusps in data collected by the LIGO and Virgo gravitational wave detectors between 2005 and 2010, with over 625 days of live time. We find no evidence of GW signals from cosmic strings. From this result, we derive new constraints on cosmic string parameters, which complement and improve existing limits from previous searches for a stochastic background of GWs from cosmic microwave background measurements and pulsar timing data. In particular, if the size of loops is given by the gravitational backreaction scale, we place upper limits on the string tension G? below 10?8 in some regions of the cosmic string parameter space.

J. Aasi et al. (LIGO Scientific Collaboration and Virgo Collaboration)

2014-04-04T23:59:59.000Z

197

Constraints on Light Pseudoscalars Implied by Tests of the Gravitational Inverse-Square Law  

E-Print Network [OSTI]

The exchange of light pseudoscalars between fermions leads to a spin-independent potential in order g^4, where g is the Yukawa pseudoscalar-fermion coupling constant. This potential gives rise to detectable violations of both the weak equivalence principle (WEP) and the gravitational inverse-square law (ISL), even if g is quite small. We show that when previously derived WEP constraints are combined with those arisingfrom ISL tests, a direct experimental limit on the Yukawa coupling of light pseudoscalars to neutrons can be inferred for the first time (g_n^2/4pi < 1.6 \\times 10^-7), along with a new (and significantly improved) limit on the coupling of light pseudoscalars to protons.

Ephraim Fischbach; Dennis E. Krause

1999-06-03T23:59:59.000Z

198

Constraints on the dark matter particle mass from the number of Milky Way satellites  

SciTech Connect (OSTI)

We have conducted N-body simulations of the growth of Milky Way-sized halos in cold and warm dark matter cosmologies. The number of dark matter satellites in our simulated Milky Ways decreases with decreasing mass of the dark matter particle. Assuming that the number of dark matter satellites exceeds or equals the number of observed satellites of the Milky Way, we derive lower limits on the dark matter particle mass. We find with 95% confidence m{sub s}>13.3 keV for a sterile neutrino produced by the Dodelson and Widrow mechanism, m{sub s}>8.9 keV for the Shi and Fuller mechanism, m{sub s}>3.0 keV for the Higgs decay mechanism, and m{sub WDM}>2.3 keV for a thermal dark matter particle. The recent discovery of many new dark matter dominated satellites of the Milky Way in the Sloan Digital Sky Survey allows us to set lower limits comparable to constraints from the complementary methods of Lyman-{alpha} forest modeling and x-ray observations of the unresolved cosmic x-ray background and of dark matter halos from dwarf galaxy to cluster scales. Future surveys like LSST, DES, PanSTARRS, and SkyMapper have the potential to discover many more satellites and further improve constraints on the dark matter particle mass.

Polisensky, Emil [Naval Research Laboratory, Washington, D.C. 20375 (United States); Department of Astronomy, University of Maryland, College Park, Maryland 20745 (United States); Ricotti, Massimo [Department of Astronomy, University of Maryland, College Park, Maryland 20745 (United States)

2011-02-15T23:59:59.000Z

199

Tropical Limit in Statistical Physics  

E-Print Network [OSTI]

Tropical limit for macroscopic systems in equilibrium defined as the formal limit of Boltzmann constant k going to 0 is discussed. It is shown that such tropical limit is well-adapted to analyse properties of systems with highly degenerated energy levels, particularly of frustrated systems like spin ice and spin glasses. Tropical free energy is a piecewise linear function of temperature, tropical entropy is a piecewise constant function and the system has energy for which tropical Gibbs' probability has maximum. Properties of systems in the points of jump of entropy are studied. Systems with finite and infinitely many energy levels and phenomena of limiting temperatures are discussed.

M. Angelelli; B. Konopelchenko

2015-02-04T23:59:59.000Z

200

Magnetic design constraints of helical solenoids  

E-Print Network [OSTI]

Helical solenoids have been proposed as an option for a Helical Cooling Channel for muons in a proposed Muon Collider. Helical solenoids can provide the required three main field components: solenoidal, helical dipole, and a helical gradient. In general terms, the last two are a function of many geometric parameters: coil aperture, coil radial and longitudinal dimensions, helix period and orbit radius. In this paper, we present design studies of a Helical Solenoid, addressing the geometric tunability limits and auxiliary correction system.

Lopes, M L; Tompkins, J C; Yonehara, K; Flanagan, G; Kahn, S A; Melconian, K

2015-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Inhomogeneous primordial nucleosynthesis and new abundance constraints on {Omega}{sub b}h{sup 2}  

SciTech Connect (OSTI)

We discuss the upper limit to the baryonic contribution to the closure density. We consider effects of new observational and theoretical uncertainties in the primordial light element abundances, and the effects of fluctuation geometry on the inhomogeneous nucleosynthesis yields. We also consider implications of the possible detection of a high D/H abundance in a Lyman-{alpha} absorption cloud at high redshift and the implied chemical evolution effects of a high deuterium abundance. We show that there exists a region of the parameter space for inhomogeneous models in which a somewhat higher baryonic contribution to the closure density is possible than that allowed in standard homogeneous models. This result is contrary to some other recent studies and is due to both geometry and recently revised uncertainties in primordial light-element abundances, particularly {sup 7}Li. We find that the presently adopted abundance constraints are consistent with a contribution of baryons to the closure density as high as {Omega}{sub b}h{sub 50}{sup 2} {le} 0.11 ({eta} {le} 7 {times} 10{sup {minus}10}). This corresponds to a 20% increase over the limit from standard homogeneous models ({Omega}{sub b}h{sub 50}{sup 2} {le} 0.08, {eta} {le} 5.8 {times} 10{sup {minus}10}). With a high deuterium abundance the upper limits for the inhomogeneous and homogeneous models would be {Omega}{sub b}h{sub 50}{sup 2} {le} 0.04 and 0.03 ({eta} {le} 2.6 {times} 10{sup {minus}10} and 1.9 {times} 10{sup {minus}10}), respectively. Even higher limits could be obtained by further relaxing the presently accepted primordial lithium abundance constraint as some have proposed.

Mathews, G.J. [Notre Dame Univ., IN (United States). Dept. of Physics]|[Lawrence Livermore National Lab., CA (United States)]|[National Astronomical Observatory of Japan, Tokyo (Japan); Kajino, T.; Orito, M. [National Astronomical Observatory of Japan, Tokyo (Japan)

1995-07-20T23:59:59.000Z

202

Geodetic Constraints on Contemporary Deformation in the Northern Walker  

Open Energy Info (EERE)

Geodetic Constraints on Contemporary Deformation in the Northern Walker Geodetic Constraints on Contemporary Deformation in the Northern Walker Lane: 2. Velocity and Strain Rate Tensor Analysis- In: Late Cenozoic Structure and Evolution of the Great Basin-Sierra Nevada Transition Jump to: navigation, search OpenEI Reference LibraryAdd to library Book Section: Geodetic Constraints on Contemporary Deformation in the Northern Walker Lane: 2. Velocity and Strain Rate Tensor Analysis- In: Late Cenozoic Structure and Evolution of the Great Basin-Sierra Nevada Transition Abstract Abstract unavailable Authors C. Kreemer, Geoffrey Blewitt and William C. Hammond Editors John S. Oldow and Patricia H. Cashman Published Geological Society of America, 2009 DOI Not Provided Check for DOI availability: http://crossref.org Online Internet link for Geodetic Constraints on Contemporary Deformation

203

Concurrent Constraint Programming and NonCommutative Logic  

E-Print Network [OSTI]

Concurrent Constraint Programming and Non­Commutative Logic Paul Ruet ? , Fran¸cois Fages LIENS as formula, computation­as­proof­search paradigm. This paradigm, first introduced for the Horn clause

Ruet, Paul

204

Motion Planning for Unmanned Aerial Vehicles with Resource Constraints  

E-Print Network [OSTI]

Small Unmanned Aerial Vehicles (UAVs) are currently used in several surveillance applications to monitor a set of targets and collect relevant data. One of the main constraints that characterize a small UAV is the maximum amount of fuel the vehicle...

Sundar, Kaarthik

2012-10-19T23:59:59.000Z

205

Composing Constraint Solvers IPA Dissertation Series 2005-18  

E-Print Network [OSTI]

Composing Constraint Solvers #12;IPA Dissertation Series 2005-18 The work reported in this thesis the auspices of the research school IPA (Institute for Programming research and Algorithmics

Zoeteweij, Peter

206

Synthesizing filtering algorithms for global chance-constraints  

Science Journals Connector (OSTI)

Stochastic Constraint Satisfaction Problems (SCSPs) are a powerful modeling framework for problems under uncertainty. To solve them is a P-Space task. The only solution approach to date compiles down SCSPs into classical CSPs. This allows the reuse of ...

Brahim Hnich; Roberto Rossi; S. Armagan Tarim; Steven Prestwich

2009-09-01T23:59:59.000Z

207

Dynamical constraints from field line topology in magnetic flux tubes  

E-Print Network [OSTI]

A topological constraint on the dynamics of a magnetic field in a flux tube arises from the fixed point indices of its field line mapping. This can explain unexpected behaviour in recent resistive-magnetohydrodynamic simulations of magnetic relaxation. Here we present the theory for a general periodic flux tube, representing, for example, a toroidal confinement device or a solar coronal loop. We show how an ideal dynamics on the side boundary of the tube implies that the sum of indices over all interior fixed points is invariant. This constraint applies to any continuous evolution inside the tube, which may be turbulent and/or dissipative. We also consider the analogous invariants obtained from periodic points (fixed points of the iterated mapping). Although there is a countably infinite family of invariants, we show that they lead to at most two independent dynamical constraints. The second constraint applies only in certain magnetic configurations. Several examples illustrate the theory.

A. R. Yeates; G. Hornig

2011-03-11T23:59:59.000Z

208

Solving CSP by Lagrangian Method with Importance of Constraints  

Science Journals Connector (OSTI)

We proposed a neural network called LPPH-CSP for solving constraint satisfaction problem (CSP). The LPPH-CSP is not trapped by any point which is not a solution of the CSP, and it can update all neurons simultane...

Takahiro Nakano; Masahiro Nagamatu

2005-01-01T23:59:59.000Z

209

Volatility and Growth: Credit Constraints and the Composition of Investment  

E-Print Network [OSTI]

How does uncertainty and credit constraints affect the cyclical composition of investment and thereby volatility and growth? This paper addresses this question within a model where firms engage in two types of investment: ...

Aghion, Philippe

210

Constraint satisfaction modules : a methodology for analog circuit design  

E-Print Network [OSTI]

This dissertation describes a methodology for solving convex constraint problems using analog circuits. It demonstrates how this methodology can be used to design circuits that solve function-fitting problems through ...

Mitros, Piotr, 1979-

2007-01-01T23:59:59.000Z

211

Terminal area flight path generation using parallel constraint propagation  

E-Print Network [OSTI]

A Flight Path Generator is defined as the module of an automated Air Traffic Control system which plans aircraft trajectories in the terminal area with respect to operational constraints. The flight path plans have to be ...

Sadoune, Michel

1989-01-01T23:59:59.000Z

212

Genetic Programming with Guaranteed Constraints Colin G. Johnson  

E-Print Network [OSTI]

Genetic Programming with Guaranteed Constraints Colin G. Johnson Computing Laboratory University of Kent at Canterbury Canterbury, Kent, CT2 7NF, England e-mail: C.G.Johnson@ukc.ac.uk Abstract: Genetic

Kent, University of

213

Stochastic constraints for vision-aided inertial navigation  

E-Print Network [OSTI]

This thesis describes a new method to improve inertial navigation using feature-based constraints from one or more video cameras. The proposed method lengthens the period of time during which a human or vehicle can navigate ...

Diel, David D., 1979-

2005-01-01T23:59:59.000Z

214

Toward the Synthesis of Constraint Solvers Douglas R. Smith  

E-Print Network [OSTI]

Toward the Synthesis of Constraint Solvers Douglas R. Smith Stephen J. Westfold Kestrel Institute Palo Alto, CA 94304 {smith,westfold}@kestrel.edu 2 November 2013 Abstract We develop a basic

Smith, Douglas R.

215

Landscape responses to intraplate tectonism: Quantitative constraints from 10  

E-Print Network [OSTI]

Landscape responses to intraplate tectonism: Quantitative constraints from 10 Be nuclide abundances approach for identifying neotectonic forcing of landscape evolution in mildly deforming continental or absent, implying that 10 Be concentration may act as a `tracer' for disequilibrium landscapes responding

Sandiford, Mike

216

Identify Vehicle Usage Mission Constraints for Reducing Greenhouse Gas  

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

Identify Vehicle Usage Mission Constraints for Reducing Greenhouse Identify Vehicle Usage Mission Constraints for Reducing Greenhouse Gas Emissions Identify Vehicle Usage Mission Constraints for Reducing Greenhouse Gas Emissions October 7, 2013 - 11:46am Addthis YOU ARE HERE: Step 2 As Federal agencies work to identify opportunities for right-sizing the fleet and replacing inefficient vehicles with new, efficient, and/or alternatively fueled models to reduce greenhouse gas (GHG) emissions, they should flag potential mission constraints associated with vehicle usage. This may involve further data collection to understand the mission considerations associated with individual vehicles. For instance, in Figure 1, Vehicle 004 appears to be underutilized, having both a low user-to-vehicle ratio and a relatively low time in use per day. However,

217

QER Public Meeting in Bismarck, ND: Infrastructure Constraints...  

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

of the meeting transcript.1 See below to download a PDF of the background memo for the Bakken Infrastructure Constraints meeting. See below to download a PDFs of the speaker's...

218

Solar system constraints on f(G) gravity models  

E-Print Network [OSTI]

We discuss solar system constraints on f(G) gravity models, where f is a function of the Gauss-Bonnet term G. We focus on cosmologically viable f(G) models that can be responsible for late-time cosmic acceleration. These models generally give rise to corrections of the form epsilon*(r/rs)^p to the vacuum Schwarzschild solution, where epsilon = H^2 rs^2 solar system constraints for a wide range of model parameters.

Antonio De Felice; Shinji Tsujikawa

2009-07-10T23:59:59.000Z

219

Leisure constraints which affect continued nonresident hunter participation  

E-Print Network [OSTI]

thesis research. I am grateful for their time, patience, and good humor. I would like to thank McAllister Maxwell, William Cook, Sara Steen, and Kelly Strnadel for their help preparing survey mailouts, offering advice, and continued support. Jason... not significantly different in the constraints they felt affected their hunting participation. Both groups listed no time due to family or work commitments, high lease cost, and distance as their greatest constraints to hunting in Texas. No significant...

Cook, Kathrine Helen

1994-01-01T23:59:59.000Z

220

Limitations on entropic Bell inequalities  

E-Print Network [OSTI]

The derivation of Bell inequalities in terms of quantum statistical (thermodynamic) entropies is considered. Inequalities of the Wigner form are derived but shown to be extremely limiting in their applicability due to the nature of the density matrices involved. This also helps to identify a limitation in the Cerf-Adami inequalities.

Ian T. Durham

2006-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

FUEL CASK IMPACT LIMITER VULNERABILITIES  

SciTech Connect (OSTI)

Cylindrical fuel casks often have impact limiters surrounding just the ends of the cask shaft in a typical 'dumbbell' arrangement. The primary purpose of these impact limiters is to absorb energy to reduce loads on the cask structure during impacts associated with a severe accident. Impact limiters are also credited in many packages with protecting closure seals and maintaining lower peak temperatures during fire events. For this credit to be taken in safety analyses, the impact limiter attachment system must be shown to retain the impact limiter following Normal Conditions of Transport (NCT) and Hypothetical Accident Conditions (HAC) impacts. Large casks are often certified by analysis only because of the costs associated with testing. Therefore, some cask impact limiter attachment systems have not been tested in real impacts. A recent structural analysis of the T-3 Spent Fuel Containment Cask found problems with the design of the impact limiter attachment system. Assumptions in the original Safety Analysis for Packaging (SARP) concerning the loading in the attachment bolts were found to be inaccurate in certain drop orientations. This paper documents the lessons learned and their applicability to impact limiter attachment system designs.

Leduc, D; Jeffery England, J; Roy Rothermel, R

2009-02-09T23:59:59.000Z

222

Black Hole Constraints on Varying Fundamental Constants  

SciTech Connect (OSTI)

We apply the generalized second law of thermodynamics and derive upper limits on the variation in the fundamental constants. The maximum variation in the electronic charge permitted for black holes accreting and emitting in the present cosmic microwave background corresponds to a variation in the fine-structure constant of {delta}{alpha}/{alpha}{approx_equal}2x10{sup -23} per second. This value matches the variation measured by Webb et al. [Phys. Rev. Lett. 82, 884 (1999); Phys. Rev. Lett. 87, 091301 (2001)] using absorption lines in the spectra of distant quasars and suggests the variation mechanism may be a coupling between the electron and the cosmic photon background.

MacGibbon, Jane H. [Department of Physics and Chemistry, University of North Florida, Jacksonville, Florida 32224 (United States)

2007-08-10T23:59:59.000Z

223

Nonlinear subcritical magnetohydrodynamic beta limit  

SciTech Connect (OSTI)

Published gyrokinetic simulations have had difficulty operating beyond about half the ideal magnetohydrodynamic (MHD) critical beta limit with stationary and low transport levels in some well-established reference cases. Here it is demonstrated that this limitation is unlikely due to numerical instability, but rather appears to be a nonlinear subcritical MHD beta limit[R. E. Waltz, Phys. Rev. Lett. 55, 1098 (1985)] induced by the locally enhanced pressure gradients from the diamagnetic component of the nonlinearly driven (zero frequency) zonal flows. Strong evidence that the zonal flow corrugated pressure gradient profiles can act as a MHD-like beta limit unstable secondary equilibrium is provided. It is shown that the addition of sufficient ExB shear or operation closer to drift wave instability threshold, thereby reducing the high-n drift wave turbulence nonlinear pumping of the zonal flows, can allow the normal high-n ideal MHD beta limit to be reached with low transport levels. Example gyrokinetic simulations of experimental discharges are provided: one near the high-n beta limit reasonably matches the low transport levels needed when the high experimental level of ExB shear is applied; a second experimental example at moderately high beta appears to be limited by the subcritical beta.

Waltz, R. E. [General Atomics, P.O. Box 85608, San Diego, California 92186-5608 (United States)

2010-07-15T23:59:59.000Z

224

CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set of  

E-Print Network [OSTI]

CSPs and complexity An instance of the constraint satisfaction problem (CSP) consists of a set to the variables in a way so that all constraints are (simultaneously) satisfied. The general CSP is NP-complete. However, when the CSP is restricted to a fixed constraint language (a set of allowed constraint

Zhao, Yuxiao

225

Use of Authorized Limits During Decontamination and Demolition Phase  

Broader source: Energy.gov [DOE]

USE OF AUTHORIZED LIMITS DURING DECONTAMINATION AND DEMOLITION PHASE Protecting the public and the environment against undue risk from radiation associated with radiological activities conducted under the control of the Department of Energy (DOE) is the purpose of DOE environmental radiation protection programs. To meet this objective, DOE Order (O) 458.1, Radiation Protection of the Public and the Environment contains radiation protection requirements including a 100 mrem/yr public dose limit and two property clearance dose constraints, 1 mrem/yr and 25 mrem/yr. During D&D activities of facilities, some waste and materials generated results in the clearance of property that does not meet the requirements for unrestricted release of surface contaminated objects as set forth in DOE O 458.1. Radioactive material on or within material, equipment, and real property which is approved for release when the radiological conditions of the material, equipment, and real property that have been documented to comply with the criteria for release set forth in a DOE Authorized Limits are exempt from 10 CFR Part 835. The development of Authorized Limits involves an evaluation process whereby land and structures, discrete items, or personal property may be cleared even though they contain minute, residual amounts of radioactivity from DOE activities. DOE O 458.1 outlines the requirements for the development and approval of Authorized Limits. By developing and applying Authorized Limits, some of the waste generated during the D&D may be sent to a public or DOE landfill for disposal instead of a Low Level Waste disposal facility without compromise in health and safety. Authorized Limits have been developed, approved, and are being applied in D&D activities at the Portsmouth and Paducah Gaseous Diffusion Plants. The development of more Authorized Limits is planned for upcoming D&D activities. The waste streams to which Authorized Limits are applied include liquid waste (oil) and solid waste. Authorized Limits have also been developed for buffer land surrounding the Paducah Gaseous Diffusion Plant as part of the long-term property management plan for the area. Currently, Authorized Limits for DOE buffer land at Portsmouth is being developed.

226

Cognitive Limitations and Investment "Myopia"  

E-Print Network [OSTI]

Optimization of investment decisions in an uncertain and dynamically evolving environment is difficult due to the limitations of the decision maker’s cognitive capacity. Thus, actual investment decisions may deviate from ...

Chi, Tailan; Fan, Dashan

1997-01-01T23:59:59.000Z

227

Ecological Exposure Limits and Guidelines  

Science Journals Connector (OSTI)

Abstract Ecological exposure limits and guidelines represent the maximum level of a chemical substance that is considered to be safe or acceptable in environmental releases or compartments. The ecological exposure limits are established to protect the ecosystems and environmental resources and may refer to the emissions, e.g., effluents, atmospheric emissions or discharges, or to the final concentration in the receiving body, e.g., water, sediment, or soil. There are two main methods for setting these limits. One focuses on the identification of best available practices for different sectors and processes; the other is a particular case of risk assessment, named by some authors as reverse risk assessment, which establishes the maximum level in the emission or receiving compartment maintaining an acceptable level of risk. The term ‘exposure limit’ is rarely used in the ecological context; the most usual terms are criteria, standards, or objectives.

J.V. Tarazona

2014-01-01T23:59:59.000Z

228

Hudol Limited | Open Energy Information  

Open Energy Info (EERE)

1TN Sector: Biomass Product: Wales-based firm with a licence that allows cost efficient gas production from biomass and Refuse derived Fuels (RDF). References: Hudol Limited1...

229

Extremal Limits and Kerr Spacetime  

E-Print Network [OSTI]

The fact that one must evaluate the near-extremal and near-horizon limits of Kerr space-time in a specific order, is shown to a lead to discontinuity in the extremal limit, such that this limiting space-time differs nontrivially from the precisely extremal space-time. This is established by first showing a discontinuity in the extremal limit of the maximal analytic extension of the Kerr geometry, given by Carter. Next, we examine the ISCO of the exactly extremal Kerr geometry and show that on the event horizon of the extremal Kerr black hole, it coincides with the principal null geodesic generator of the horizon, having vanishing energy and angular momentum. We find that there is no such ISCO in the near-extremal geometry, thus garnering additional support for our primary contention. We relate this disparity between the two geometries to the lack of a trapping horizon in the extremal situation.

Parthapratim Pradhan; Parthasarathi Majumdar

2011-08-11T23:59:59.000Z

230

Spitzer White Dwarf Planet Limits  

E-Print Network [OSTI]

We present preliminary limits on the presence of planets around white dwarf stars using the IRAC photometer on the Spitzer space telescope. Planets emit strongly in the mid-infrared which allows their presence to be detected as an excess at these wavelengths. We place limits of $5 M_J$ for 8 stars assuming ages of $1 Gyr$, and $10 M_J$ for 23 stars.We describe our survey, present our results and comment on approaches to improve our methodology.

F. Mullally; Ted von Hippel; D. E. Winget

2006-10-28T23:59:59.000Z

231

URANIUM-SERIES CONSTRAINTS ON RADIONUCLIDE TRANSPORT AND GROUNDWATER FLOW AT NOPAL I URANIUM DEPOSIT, SIERRA PENA BLANCA, MEXICO  

SciTech Connect (OSTI)

Uranium-series data for groundwater samples from the vicinity of the Nopal I uranium ore deposit are used to place constraints on radionuclide transport and hydrologic processes at this site, and also, by analogy, at Yucca Mountain. Decreasing uranium concentrations for wells drilled in 2003 suggest that groundwater flow rates are low (< 10 m/yr). Field tests, well productivity, and uranium isotopic constraints also suggest that groundwater flow and mixing is limited at this site. The uranium isotopic systematics for water collected in the mine adit are consistent with longer rock-water interaction times and higher uranium dissolution rates at the front of the adit where the deposit is located. Short-lived nuclide data for groundwater wells are used to calculate retardation factors that are on the order of 1,000 for radium and 10,000 to 10,000,000 for lead and polonium. Radium has enhanced mobility in adit water and fractures near the deposit.

S. J. Goldstein, S. Luo, T. L. Ku, and M. T. Murrell

2006-04-01T23:59:59.000Z

232

Taylor forms { use and limits Arnold Neumaier  

E-Print Network [OSTI]

integration of asteroid dynamics in the solar system in 2001. Apart from summarizing what Taylor forms, centered form, cluster e#11;ect, computer-assisted proof, constraint propagation, dependence, interval

Neumaier, Arnold

233

Taylor forms use and limits Arnold Neumaier  

E-Print Network [OSTI]

of asteroid dynamics in the solar system in 2001. Apart from summarizing what Taylor forms are and do, cluster effect, computer-assisted proof, constraint propagation, dependence, interval arithmetic

Neumaier, Arnold

234

Mass Transfer Constraints On The Chemical Evolution Of An Active  

Open Energy Info (EERE)

Mass Transfer Constraints On The Chemical Evolution Of An Active Mass Transfer Constraints On The Chemical Evolution Of An Active Hydrothermal System, Valles Caldera, New Mexico Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: Mass Transfer Constraints On The Chemical Evolution Of An Active Hydrothermal System, Valles Caldera, New Mexico Details Activities (4) Areas (2) Regions (0) Abstract: Partial equilibrium conditions occur between fluids and secondary minerals in the Valles hydrothermal system, contained principally in the Tertiary rhyolitic Bandelier Tuff. The mass transfer processes are governed by reactive phase compositions, surface areas, water-rock ratios, reaction rates, and fluid residence times. Experimental dissolution of the vitric phase of the tuff was congruent with respect to Cl in the solid and

235

Cosmological and astrophysical constraints on superconducting cosmic strings  

SciTech Connect (OSTI)

We investigate the cosmological and astrophysical constraints on superconducting cosmic strings (SCSs). SCS loops emit strong bursts of electromagnetic waves, which might affect various cosmological and astrophysical observations. We take into account the effect on the CMB anisotropy, CMB blackbody spectrum, BBN, observational implications on radio wave burst and X-ray or ?-ray events, and stochastic gravitational wave background measured by pulsar timing experiments. We then derive constraints on the parameters of SCS from current observations and estimate prospects for detecting SCS signatures in on-going observations. As a result, we find that these constraints exclude broad parameter regions, and also that on-going radio wave observations can probe large parameter space.

Miyamoto, Koichi [Institute for Cosmic Ray Research, University of Tokyo, Kashiwa 277-8582 (Japan); Nakayama, Kazunori, E-mail: miyamone@icrr.u-tokyo.ac.jp, E-mail: kazunori@hep-th.phys.s.u-tokyo.ac.jp [Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan)

2013-07-01T23:59:59.000Z

236

Geologic and thermochronologic constraints on the initial orientation of  

Open Energy Info (EERE)

and thermochronologic constraints on the initial orientation of and thermochronologic constraints on the initial orientation of the Raft River detachment and footwall shear zone Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Geologic and thermochronologic constraints on the initial orientation of the Raft River detachment and footwall shear zone Details Activities (2) Areas (1) Regions (0) Abstract: The Raft River Mountains of northwestern Utah expose a detachment fault that separates a hanging wall of Paleozoic rocks from Proterozoic and Archean rocks of the footwall. Beneath the detachment lies a 100 to 300m-thick top-to-the-east extensional shear zone. Geologic mapping, strain and kinematic analysis, and 40Ar/39 Ar thermochronology suggest that the shear zone and detachment fault had an initial low-angle regional

237

Constraints on anomalous spin-spin interactions from spin-exchange collisions  

SciTech Connect (OSTI)

A comparison between existing measurements and calculated cross sections for spin exchange between alkali-metal atoms and noble gases (specifically sodium and helium) is used to constrain anomalous spin-dependent forces between nuclei at the atomic scale ({approx}10{sup -8} cm). Combined with existing stringent limits on anomalous short-range, spin-dependent couplings of the proton, the dimensionless coupling constant for an axial vector interaction of the neutron arising from exchange of a boson of mass < or approx. 100 eV is constrained to be g{sub A}{sup n}/{radical}(4{pi}({h_bar}/2{pi})c)<2x10{sup -3}. Constraints are established for a velocity- and spin-dependent interaction {proportional_to}(I{center_dot}v)(K{center_dot}v), where I and K are the nuclear spins of He and Na, respectively, and v is the relative velocity of the atoms. Constraints on torsion gravity are also considered.

Jackson Kimball, D. F.; Boyd, Alec; Budker, D. [Department of Physics, California State University-East Bay, Hayward, California 94542-3084 (United States); Physics and Astronomy Department, Pomona College, Claremont, California 91711-6324 (United States); Department of Physics, University of California at Berkeley, Berkeley, California 94720-7300, and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

2010-12-15T23:59:59.000Z

238

Constraints on anomalous spin-spin interactions from spin-exchange collisions  

E-Print Network [OSTI]

Measured and calculated cross sections for spin-exchange between alkali atoms and noble gases (specifically sodium and helium) are used to constrain anomalous spin-dependent forces between nuclei at the atomic scale ($\\sim 10^{-8}~{\\rm cm}$). Combined with existing stringent limits on anomalous short-range, spin-dependent couplings of the proton, the dimensionless coupling constant for a heretofore undiscovered axial vector interaction of the neutron arising from exchange of a boson of mass $\\lesssim 100~{\\rm eV}$ is constrained to be $g_A^n/\\sqrt{4 \\pi \\hbar c} < 2 \\times 10^{-3}$. Constraints are established for a velocity- and spin-dependent interaction $\\propto \\prn{\\mathbf{I} \\cdot \\mathbf{v}} \\prn{\\mathbf{K} \\cdot \\mathbf{v}}$, where $\\mathbf{I}$ and $\\mathbf{K}$ are the nuclear spins of He and Na, respectively, and $\\mathbf{v}$ is the relative velocity of the atoms. Constraints on torsion gravity are also considered.

D. F. Jackson Kimball; Alec Boyd; D. Budker

2010-10-07T23:59:59.000Z

239

Constraint based approach for the steady-state simulation of complex systems: Application to ship control  

Science Journals Connector (OSTI)

When the steady states are largely predominant with respect to transitional phases, steady-state simulation seems sufficient to predict the behavior of a complex system. Over the past 20 years, different modeling languages and dedicated tools have been developed to improve steady state simulation. In this paper, focus is made on steady-state simulation for system control and design. A model combining an emission sub-model with a ship propulsion sub-model was implemented in a constraint programming (CP) approach. It will help to determine the efficiency (i.e. the ability to model and solve the problem) and complexity of implementation (i.e. difficulties encountered during the implementation) of this approach. First, requirements for the steady-state simulation of complex systems are defined. Then, CP approach is shown to be able to answer these issues through experiments. This approach is then compared to one of the main simulation languages: Modelica. Although the two approaches (i.e Modelica and CP) are able to reverse models, the study shows that the use of Modelica principles for steady-state simulation involves some crippling limitations, such as the non-management of under/over-constrained systems, or inequalities. This study also shows that the constraint programming approach permits to meet some needs for steady-state simulation not yet covered by current approaches.

Vincent Larroudé; Raphael Chenouard; Pierre-Alain Yvars; Dominique Millet

2013-01-01T23:59:59.000Z

240

Ablamp Limited | Open Energy Information  

Open Energy Info (EERE)

Ablamp Limited Ablamp Limited Jump to: navigation, search Name Ablamp Limited Place Nanhai, Guangdong Province, China Sector Solar Product Manufacturer of energy-saving Compact Fluorescent Light Bulbs, solar-powered lights, LED bulbs, auto lamps and other speciality lamps. Coordinates 23.049681°, 113.173737° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":23.049681,"lon":113.173737,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "marketplace constraints limit" 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.


241

Solfex Limited | Open Energy Information  

Open Energy Info (EERE)

Solfex Limited Solfex Limited Jump to: navigation, search Name Solfex Limited Address Energy Arena Bannister Hall Works Off Shop Lane, Higher Walton Preston, Lancashire PR5 4DZ Place Preston, United Kingdom Sector Solar Product Solar thermal collectors Phone number 01772 312847 Website http://www.solfex.co.uk/home.h Coordinates 53.743452°, -2.64416° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":53.743452,"lon":-2.64416,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

242

Bioethanol Limited | Open Energy Information  

Open Energy Info (EERE)

Bioethanol Limited Bioethanol Limited Jump to: navigation, search Name Bioethanol Limited Place London, United Kingdom Zip SE1 7TJ Sector Renewable Energy Product Aims to develop a global renewable transport fuel business supplying primarily bioethanol but also biodiesel. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

243

Renpro Limited | Open Energy Information  

Open Energy Info (EERE)

Renpro Limited Renpro Limited Jump to: navigation, search Name Renpro Limited Place London, England, United Kingdom Zip WC2N 4JF Sector Renewable Energy Product String representation "Founded in 2005 ... newable energy." is too long. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

244

Gamma Ray Burst Constraints on Ultraviolet Lorentz Invariance Violation  

E-Print Network [OSTI]

We present a unified general formalism for ultraviolet Lorentz invariance violation (LV) testing through electromagnetic wave propagation, based on both dispersion and rotation measure data. This allows for a direct comparison of the efficacy of different data to constrain LV. As an example we study the signature of LV on the rotation of the polarization plane of $\\gamma$-rays from gamma ray bursts in a LV model. Here $\\gamma$-ray polarization data can provide a strong constraint on LV, 13 orders of magnitude more restrictive than a potential constraint from the rotation of the cosmic microwave background polarization proposed by Gamboa, L\\'{o}pez-Sarri\\'{o}n, and Polychronakos (2006).

Tina Kahniashvili; Grigol Gogoberidze; Bharat Ratra

2006-10-20T23:59:59.000Z

245

Neutron stars in f(R) gravity with perturbative constraints  

SciTech Connect (OSTI)

We study the structure of neutron stars in f(R) gravity theories with perturbative constraints. We derive the modified Tolman-Oppenheimer-Volkov equations and solve them for a polytropic equation of state. We investigate the resulting modifications to the masses and radii of neutron stars and show that observations of surface phenomena alone cannot break the degeneracy between altering the theory of gravity versus choosing a different equation of state of neutron-star matter. On the other hand, observations of neutron-star cooling, which depends on the density of matter at the stellar interior, can place significant constraints on the parameters of the theory.

Cooney, Alan; DeDeo, Simon; Psaltis, Dimitrios [Department of Physics, University of Arizona, Tucson, Arizona 85721 (United States); Santa Fe Institute, 1399 Hyde Park Road, Santa Fe, New Mexico 87501 (United States); Departments of Astronomy and Physics, University of Arizona, Tucson, Arizona 85721 (United States)

2010-09-15T23:59:59.000Z

246

TeV Astrophysics Constraints on Planck Scale Lorentz Violation  

E-Print Network [OSTI]

We analyze observational constraints from TeV astrophysics on Lorentz violating nonlinear dispersion for photons and electrons without assuming any a priori equality between the photon and electron parameters. The constraints arise from thresholds for vacuum Cerenkov radiation, photon decay and photo-production of electron-positron pairs. We show that the parameter plane for cubic momentum terms in the dispersion relations is constrained to an order unity region in Planck units. We find that the threshold configuration can occur with an asymmetric distribution of momentum for pair creation, and with a hard photon for vacuum Cerenkov radiation.

Ted Jacobson; Stefano Liberati; David Mattingly

2002-09-24T23:59:59.000Z

247

Constraints on the density dependence of the symmetry energy  

E-Print Network [OSTI]

Collisions involving 112Sn and 124Sn nuclei have been simulated with the improved Quantum Molecular Dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at sub-normal density are obtained. Results from present work are compared to constraints put forward in other recent analysis.

M. B. Tsang; Yingxun Zhang; P. Danielewicz; M. Famiano; Zhuxia Li; W. G. Lynch; A. W. Steiner

2008-11-19T23:59:59.000Z

248

Constraints on the Density Dependence of the Symmetry Energy  

SciTech Connect (OSTI)

Collisions involving {sup 112}Sn and {sup 124}Sn nuclei have been simulated with the improved quantum molecular dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at subnormal density are obtained. The results from the present work are compared to constraints put forward in other recent analyses.

Tsang, M. B.; Danielewicz, P.; Lynch, W. G.; Steiner, A. W. [Joint Institute of Nuclear Astrophysics and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); Physics and Astronomy Department, Michigan State University, East Lansing, Michigan 48824 (United States); Zhang Yingxun [Joint Institute of Nuclear Astrophysics and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States); China Institute of Atomic Energy, P.O. Box 275 (18), Beijing 102413 (China); Famiano, M. [Physics Department, Western Michigan University, Kalamazoo, Michigan 49008 (United States); Li, Zhuxia [China Institute of Atomic Energy, P.O. Box 275 (18), Beijing 102413 (China)

2009-03-27T23:59:59.000Z

249

Constraints on the density dependence of the symmetry energy  

E-Print Network [OSTI]

Collisions involving 112Sn and 124Sn nuclei have been simulated with the improved Quantum Molecular Dynamics transport model. The results of the calculations reproduce isospin diffusion data from two different observables and the ratios of neutron and proton spectra. By comparing these data to calculations performed over a range of symmetry energies at saturation density and different representations of the density dependence of the symmetry energy, constraints on the density dependence of the symmetry energy at sub-normal density are obtained. Results from present work are compared to constraints put forward in other recent analysis.

Tsang, M B; Danielewicz, P; Famiano, M; Li, Zhuxia; Lynch, W G; Steiner, A W

2008-01-01T23:59:59.000Z

250

Limits on light-speed anisotropies from Compton scattering of high-energy electrons  

E-Print Network [OSTI]

The possibility of anisotropies in the speed of light relative to the limiting speed of electrons is considered. The absence of sidereal variations in the energy of Compton-edge photons at the ESRF's GRAAL facility constrains such anisotropies representing the first non-threshold collision-kinematics study of Lorentz violation. When interpreted within the minimal Standard-Model Extension, this result yields the two-sided limit of 1.6 x 10^{-14} at 95% confidence level on a combination of the parity-violating photon and electron coefficients kappa_{o+} and c. This new constraint provides an improvement over previous bounds by one order of magnitude.

J. -P. Bocquet; D. Moricciani; V. Bellini; M. Beretta; L. Casano; A. D'Angelo; R. Di Salvo; A. Fantini; D. Franco; G. Gervino; F. Ghio; G. Giardina; B. Girolami; A. Giusa; V. G. Gurzadyan; A. Kashin; S. Knyazyan; A. Lapik; R. Lehnert; P. Levi Sandri; A. Lleres; F. Mammoliti; G. Mandaglio; M. Manganaro; A. Margarian; S. Mehrabyan; R. Messi; V. Nedorezov; C. Perrin; C. Randieri; D. Rebreyend; N. Rudnev; G. Russo; C. Schaerf; M. L. Sperduto; M. C. Sutera; A. Turinge; V. Vegna

2010-05-28T23:59:59.000Z

251

Solar system constraints on asymptotically flat IR modified Horava gravity through light deflection  

E-Print Network [OSTI]

In this paper, we study the motion of photons around a Kehagias-Sfetsos (KS) black hole and obtain constraints on IR modified Ho$\\check{r}$ava gravity without cosmological constant ($\\sim \\Lambda_{W}$). An analytic formula for the light deflection angle is obtained. For a propagating photon, the deflection angle $\\delta \\phi$ increases with large values of the Ho$\\check{r}$ava gravity parameter $\\omega$. Under the UV limit $\\omega \\longrightarrow \\infty$, deflection angle reduces to the result of usual Schwarzschild case, $4GM/R$. It is also found that with increasing scale of astronomical observation system the Ho$\\check{r}$ava-Lifshitz gravity should satisfy $|\\omega M^2|>1.1725 \\times10^{-16}$ with 12% precision for Earth system, $|\\omega M^2| > 8.27649 \\times 10^{-17}$ with 17% precision for Jupiter system and $|\\omega M^2| > 8.27650\\times 10^{-15}$ with 0.17% precision for solar system.

Molin Liu; Junwang Lu; Benhai Yu; Jianbo Lu

2010-11-15T23:59:59.000Z

252

Review and Exams Limited Certification  

E-Print Network [OSTI]

__________________________________ Check which exam you will be taking: Commercial Landscape Maintenance Lawn & Ornamental CEU's ONLY 8 Limited Certification for Commercial Landscape Maintenance A license is necessary for each commercial landscape maintenance person who applies pesticides to ornamental plant beds. Application available at: http

Watson, Craig A.

253

Classical limits of unconstrained QFT  

E-Print Network [OSTI]

In nonrelativistic limits for states labeled by minimum packets with constrained spatial spreads and over a short term, states of unconstrained quantum field theories evolve on trajectories described by Newton's equations for the $1/r^2$ force. These states include bound solutions in the attractive force case.

Glenn Eric Johnson

2014-12-21T23:59:59.000Z

254

Constraints on Lorentz invariance violation from Fermi-Large Area Telescope observations of gamma-ray bursts  

Science Journals Connector (OSTI)

We analyze the MeV/GeV emission from four bright gamma-ray bursts (GRBs) observed by the Fermi Large Area Telescope to produce robust, stringent constraints on a dependence of the speed of light in vacuo on the photon energy (vacuum dispersion), a form of Lorentz invariance violation (LIV) allowed by some quantum gravity (QG) theories. First, we use three different and complementary techniques to constrain the total degree of dispersion observed in the data. Additionally, using a maximally conservative set of assumptions on possible source-intrinsic, spectral-evolution effects, we constrain any vacuum dispersion solely attributed to LIV. We then derive limits on the QG energy scale (the energy scale where LIV-inducing QG effects become strong, EQG) and the coefficients of the Standard Model Extension. For the subluminal case (where high-energy photons propagate more slowly than lower-energy photons) and without taking into account any source-intrinsic dispersion, our most stringent limits (at 95% C.L.) are obtained from GRB 090510 and are EQG,1>7.6 times the Planck energy (EPl) and EQG,2>1.3×1011??GeV for linear and quadratic leading-order LIV-induced vacuum dispersion, respectively. These limits improve the latest constraints by Fermi and H.E.S.S. by a factor of ?2. Our results disfavor any class of models requiring EQG,1?EPl.

V. Vasileiou; A. Jacholkowska; F. Piron; J. Bolmont; C. Couturier; J. Granot; F. W. Stecker; J. Cohen-Tanugi; F. Longo

2013-06-04T23:59:59.000Z

255

Constraint Orientated Specification with CSP and Real Time Temporal Logic  

E-Print Network [OSTI]

Constraint Orientated Specification with CSP and Real Time Temporal Logic Justin Pearson Department Processes (CSP) [Hoa85] and a version of Propositional Temporal Logic (PTL), derived from [Eme90]. CSP. The behaviour of a CSP process is dependent on its environment; it is therefore difficult to assert global

Kent, University of

256

Planning Motions for Robotic Systems Subject to Differential Constraints  

E-Print Network [OSTI]

Planning Motions for Robotic Systems Subject to Differential Constraints Alessandro De Luca of planning point-to-point motion for general robotic systems subject to non-integrable differential feedback linearization, are illustrated with the aid of four case studies: the plate-ball manipulation

De Luca, Alessandro

257

Liquidity Constraints and Consumer Bankruptcy: Evidence from Tax Rebates  

E-Print Network [OSTI]

Liquidity Constraints and Consumer Bankruptcy: Evidence from Tax Rebates Tal Gross Matthew J rebates affected consumer bankruptcy filings. We exploit the randomized timing of the rebate checks and estimate that the rebates caused a significant, short-run increase in consumer bankruptcies in both years

Grishok, Alla

258

Rotein Constraints Induced by Multiframe Encoding TEMPLE F.SMITH*  

E-Print Network [OSTI]

Rotein Constraints Induced by Multiframe Encoding TEMPLE F.SMITH* Piysics Dqartment, Northern North Holland, Inc., 1980 0025-5564/80/030017 +1W02.25 #12;18 TEMPLE F. SMITH AND MICHAEL S. W A T E W

Waterman, Michael S.

259

Safe Approximations of Chance Constraints Using Historical Data  

E-Print Network [OSTI]

constraint, where random perturbations belong to a collection of distributions in a given con- ...... stresses on different points of the tube and if the temperature is too high, it will scrap the tube due ..... [10] W. Chen, M. Sim, J. Sun, and C.P. Teo.

2015-01-11T23:59:59.000Z

260

Cosmology and astrophysics from relaxed galaxy clusters – II. Cosmological constraints  

Science Journals Connector (OSTI)

......area of Chandra. Our figure of merit is defined as the inverse of...slightly different figures of merit here compared to that work...decision to normalize our figure of merit to the current f gas constraints...Arnaud for their work on xspec, Nick Battaglia and Susana Planelles......

A. B. Mantz; S. W. Allen; R. G. Morris; D. A. Rapetti; D. E. Applegate; P. L. Kelly; A. von der Linden; R. W. Schmidt

2014-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Optimal lifetime consumption and investment under drawdown constraint  

E-Print Network [OSTI]

Optimal lifetime consumption and investment under drawdown constraint Romuald Elie Nizar Touzi October 21, 2006 Abstract We consider the infinite horizon optimal consumption-investment problem under-form expressions for the optimal consumption and investment strategy. Key words: portfolio allocation, drawdown

Elie, Romuald

262

SPECTRUM OPPORTUNITY AND INTERFERENCE CONSTRAINT IN OPPORTUNISTIC SPECTRUM ACCESS  

E-Print Network [OSTI]

of the radio spec- trum? Actual spectrum usage measurements obtained by the FCC's Spectrum Policy Task Force [1SPECTRUM OPPORTUNITY AND INTERFERENCE CONSTRAINT IN OPPORTUNISTIC SPECTRUM ACCESS Qing Zhao@ece.ucdavis.edu ABSTRACT In this paper, we study two important concepts in opportunis- tic spectrum access: spectrum

Islam, M. Saif

263

Multi-Rank Adaptive Beamforming with Linear and Quadratic Constraints  

E-Print Network [OSTI]

Multi-Rank Adaptive Beamforming with Linear and Quadratic Constraints Henry Cox, Ali Pezeshki the signal is either rank-one of unknown orientation in a subspace or multi-rank. Only signal. The unifying component is the multi-rank MVDR beamformer followed by post processing. Detection statistics

Pezeshki, Ali

264

A Two-Constraint Approach to Risky CyberSecurity  

E-Print Network [OSTI]

A Two-Constraint Approach to Risky CyberSecurity Experiment Management John Wroclawski, Jelena Mirkovic, Ted Faber, Stephen Schwab #12;Risky CyberSecurity Research CyberSecurity systems becoming more;Domains of interest Traditional risky experiment Virus dissection Modern risky CyberSecurity

Faber, Ted

265

Active constraint regions for optimal operation of distillation columns  

E-Print Network [OSTI]

Active constraint regions for optimal operation of distillation columns Magnus G. Jacobsen the control structure of distillation columns, with optimal operation in mind, it is important to know how for distillation columns change with variations in energy cost and feed flow rate. The production of the most

Skogestad, Sigurd

266

Hierarchical clustering using correlation metric and spatial continuity constraint  

DOE Patents [OSTI]

Large data sets are analyzed by hierarchical clustering using correlation as a similarity measure. This provides results that are superior to those obtained using a Euclidean distance similarity measure. A spatial continuity constraint may be applied in hierarchical clustering analysis of images.

Stork, Christopher L.; Brewer, Luke N.

2012-10-02T23:59:59.000Z

267

Temporal Conditions and Integrity Constraints in Active Database Systems \\Lambda  

E-Print Network [OSTI]

database history. The evaluation algorithm is also an add­on component, executed on top of, and usingTemporal Conditions and Integrity Constraints in Active Database Systems \\Lambda A. Prasad Sistla, for specifying conditions and events in the rules for active database sys­ tem. This language permits

Wolfson, Ouri E.

268

Mathematical programs with complementarity constraints in traffic and telecommunications networks  

Science Journals Connector (OSTI)

...applications such as a large-scale nonlinear MPCC model of an electricity market network with 20000 variables and 10000 constraints...and R Srikant2006A tutorial on cross-layer optimization in wireless networks. IEEE J. Select. Areas Commun. 24, 1452-1463...

2008-01-01T23:59:59.000Z

269

X D C X f g Constraint satisfaction.  

E-Print Network [OSTI]

the problem of BIBD generation. In Section 5, we formulate the BIBD generation as a CSP and give empirical and future work. A finite CSP is defined by a triple ( ), where = is a set of variables on ( ). A of the CSP is an assignment of values to vari­ ables which satisfies every constraint. A value is for a

Torras, Carme

270

Opportunistic Scheduling for utility maximization under QoS constraints  

E-Print Network [OSTI]

1 Opportunistic Scheduling for utility maximization under QoS constraints Neung-Hyung Lee, Jin. Our opportunistic scheduling aims at maximizing the utility which is usually expressed as a function of user throughput. In this paper we derive an off-line optimal scheduling policy by optimization theory

Bahk, Saewoong

271

Technology Mapping Targeting Routing Congestion under Delay Constraints  

E-Print Network [OSTI]

1 Technology Mapping Targeting Routing Congestion under Delay Constraints Rupesh S. Shelar, Member a serious concern in today's VLSI designs. To address the same, we propose a technology mapping algorithm in a 100 nm technology show that the algorithm can improve track overflows by 59%, on an average

Sapatnekar, Sachin

272

Financial Constraints as a Barrier to Export Participation  

E-Print Network [OSTI]

be called for to help efficient but financially constrained firms to overcome the sunk entry costs constraint; Sunk costs JEL Classification: F14; G32; L25; D92 University of Nice - Sophia Antipolis the role of sunk entry costs into export markets (Baldwin, 1988; Roberts and Tybout, 1997; Melitz, 2003

Paris-Sud XI, Université de

273

QER Public Meeting: New England Regional Infrastructure Constraints Part I  

Broader source: Energy.gov [DOE]

The Department of Energy will convene a public meeting to discuss and receive comments on issues related to the Quadrennial Energy Review. The purpose of the meeting is to examine energy infrastructure constraints in New England and regional approaches to addressing them

274

QER Public Meeting: New England Regional Infrastructure Constraints Part II  

Broader source: Energy.gov [DOE]

The Department of Energy will convene a public meeting to discuss and receive comments on issues related to the Quadrennial Energy Review. The purpose of the meeting is to examine energy infrastructure constraints in New England and regional approaches to addressing them

275

Convex measures of risk and trading constraints Hans Follmer  

E-Print Network [OSTI]

\\acceptable". In Section 2 we prove a representation theorem for convex measures of risk. In the case in whichConvex measures of risk and trading constraints Hans Follmer Institut fur Mathematik Humboldt of a convex measure of risk, an extension of the concept of a coherent risk measure de#12;ned in Artzner et al

Föllmer, Hans

276

Geometric Structure of Two Self-dual Fields with Constraints  

E-Print Network [OSTI]

A two dimensional Poincar$\\acute{e}$-invariant self-dual field with constraints is studied in geometric way. We obtained its symplectic structure and conservative currents on space of solutions, which are also invariant under transformations of Poincar$\\acute{e}$ group.

Xurong Chen

2007-11-18T23:59:59.000Z

277

Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint  

E-Print Network [OSTI]

Renewable Energy Scheduling for Fading Channels with Maximum Power Constraint Zhe Wang Electrical--In this paper, we develop efficient algorithm to obtain the optimal energy schedule for fading channel with energy harvesting. We assume that the side information of both the channel states and energy harvesting

Greenberg, Albert

278

Optimal Control of a Continuous Distillation Process under Probabilistic Constraints  

E-Print Network [OSTI]

. The aim is to find a control (feed rate, heat supply, reflux rate) which is optimal with respect to energyOptimal Control of a Continuous Distillation Process under Probabilistic Constraints René Henrion1 to be separated or to its temperature. Typically, the un- certainties are not completely irregular but follow

Henrion, René

279

Evolutionary constraints in variable environments, from proteins to  

E-Print Network [OSTI]

networks. At the most elementary level, genetic constraints in constant environments can be expressed a particular residue could increase resistance to antibiotics, but only if a second residue was mutated first, otherwise the resistance de- creased [4,17]. Such sign�epistatic interactions [5�7] can result from

Tans, Sander

280

Codes and sofic constraints Marie-Pierre Beal  

E-Print Network [OSTI]

Codes and sofic constraints Marie-Pierre B´eal Dominique Perrin January 14, 2005 Abstract We study-la-Vall´ee Cedex 2, France. {beal,perrin}@univ-mlv.fr 1 hal-00619227,version1-5Sep2011 Author manuscript, published

Paris-Sud XI, Université de

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


281

Testing robot controllers using constraint programming and continuous integration  

Science Journals Connector (OSTI)

AbstractContext Testing complex industrial robots (CIRs) requires testing several interacting control systems. This is challenging, especially for robots performing process-intensive tasks such as painting or gluing, since their dedicated process control systems can be loosely coupled with the robot’s motion control. Objective Current practices for validating \\{CIRs\\} involve manual test case design and execution. To reduce testing costs and improve quality assurance, a trend is to automate the generation of test cases. Our work aims to define a cost-effective automated testing technique to validate CIR control systems in an industrial context. Method This paper reports on a methodology, developed at ABB Robotics in collaboration with SIMULA, for the fully automated testing of \\{CIRs\\} control systems. Our approach draws on continuous integration principles and well-established constraint-based testing techniques. It is based on a novel constraint-based model for automatically generating test sequences where test sequences are both generated and executed as part of a continuous integration process. Results By performing a detailed analysis of experimental results over a simplified version of our constraint model, we determine the most appropriate parameterization of the operational version of the constraint model. This version is now being deployed at ABB Robotics’s CIR testing facilities and used on a permanent basis. This paper presents the empirical results obtained when automatically generating test sequences for \\{CIRs\\} at ABB Robotics. In a real industrial setting, the results show that our methodology is not only able to detect reintroduced known faults, but also to spot completely new faults. Conclusion Our empirical evaluation shows that constraint-based testing is appropriate for automatically generating test sequences for \\{CIRs\\} and can be faithfully deployed in an industrial context.

Morten Mossige; Arnaud Gotlieb; Hein Meling

2015-01-01T23:59:59.000Z

282

Linear Perturbation constraints on Multi-coupled Dark Energy  

E-Print Network [OSTI]

The Multi-coupled Dark Energy (McDE) scenario has been recently proposed as a specific example of a cosmological model characterized by a non-standard physics of the dark sector of the universe that nevertheless gives an expansion history which does not significantly differ from the one of the standard $\\Lambda $CDM model. In this work, we present the first constraints on the McDE scenario obtained by comparing the predicted evolution of linear density perturbations with a large compilation of recent data sets for the growth rate $f\\sigma_{8}$, including 6dFGS, LRG, BOSS, WiggleZ and VIPERS. Confirming qualitative expectations, growth rate data provide much tighter bounds on the model parameters as compared to the extremely loose bounds that can be obtained when only the background expansion history is considered. In particular, the $95\\%$ confidence level on the coupling strength $|\\beta |$ is reduced from $|\\beta |\\leq 83$ (background constraints only) to $|\\beta |\\leq 0.88$ (background and linear perturbation constraints). We also investigate how these constraints further improve when using data from future wide-field surveys such as supernova data from LSST and growth rate data from Euclid-type missions. In this case the $95\\%$ confidence level on the coupling further reduce to $|\\beta |\\leq 0.85$. Such constraints are in any case still consistent with a scalar fifth-force of gravitational strength, and we foresee that tighter bounds might be possibly obtained from the investigation of nonlinear structure formation in McDE cosmologies.[Abridged

Arpine Piloyan; Valerio Marra; Marco Baldi; Luca Amendola

2014-01-12T23:59:59.000Z

283

Definition: System Operating Limit | Open Energy Information  

Open Energy Info (EERE)

Operating Limit Operating Limit Jump to: navigation, search Dictionary.png System Operating Limit The value (such as MW, MVar, Amperes, Frequency or Volts) that satisfies the most limiting of the prescribed operating criteria for a specified system configuration to ensure operation within acceptable reliability criteria. System Operating Limits are based upon certain operating criteria. These include, but are not limited to: Facility Ratings (Applicable pre- and post- Contingency equipment or facility ratings), Transient Stability Ratings (Applicable pre- and post-Contingency Stability Limits), Voltage Stability Ratings (Applicable pre- and post- Contingency Voltage Stability), System Voltage Limits (Applicable pre- and post- Contingency Voltage Limits)[1] Also Known As SOL

284

New Limits to the IR Background: Bounds on Radiative Neutrino Decay and on VMO Contributions to the Dark Matter Problem  

E-Print Network [OSTI]

From considering the effect of gamma-gamma interactions on recently observed TeV gamma-ray spectra, improved limits are set to the density of extragalactic infrared (IR) photons which are robust and essentially model-independent. The resulting limits are up to two orders of magnitude more restrictive than direct observations in the 0.025-0.3eV regime. These limits are used to improve constraints on radiative neutrino decay in the mass range above 0.05eV and on Very Massive Objects (VMOs) as providing the dark matter needed to explain galaxy rotation curves.

S. D. Biller; J. Buckley; A. Burdett; J. Bussons Gordo; D. A. Carter-Lewis; D. J. Fegan; J. Findley; J. A. Gaidos; A. M. Hillas; F. Krennrich; R. C. Lamb; R. Lessard; J. E. McEnery; G. Mohanty; J. Quinn; A. J. Rodgers; H. J. Rose; F. Samuelson; G. Sembroski; P. Skelton; T. C. Weekes; J; Zweerink

1998-02-18T23:59:59.000Z

285

Constraints on adaptation: explaining deviation from optimal sex ratio using artificial neural networks  

E-Print Network [OSTI]

Y Keywords: adaptation; artificial neural networks; evolutionary constraints; parasitoid; sex ratio by modelling information acquisition and processing using artificial neural networks (ANNs) evolving accordingConstraints on adaptation: explaining deviation from optimal sex ratio using artificial neural

West, Stuart

286

Solving Regular Tree Grammar Based Constraints Yanhong A. Liu Ning Li Scott D. Stoller  

E-Print Network [OSTI]

Solving Regular Tree Grammar Based Constraints Yanhong A. Liu Ning Li Scott D. Stoller July 2000 and is then simpli ed according to a set of simpli cation rules to produce the solution. Usually, the constraints

Stoller, Scott

287

Geodynamic and seismic constraints on the thermochemical structure and dynamics of convection in the deep mantle  

Science Journals Connector (OSTI)

...Brodholt and B. J. Wood Geodynamic and seismic constraints on the thermochemical structure...by this viscosity peak. geodynamics|seismic tomography|mantle viscosity|three-dimensional...anomalies|mantle convection| Geodynamic and seismic constraints on the thermochemical structure...

2002-01-01T23:59:59.000Z

288

OE Releases "Transmission Constraints and Congestion in the Western and Eastern Interconnections, 2009-2012"  

Broader source: Energy.gov [DOE]

The "Transmission Constraints and Congestion in the Western and Eastern Interconnections, 2009-2012" document, which is now available for downloading, is a compilation of publicly-available data on transmission constraints and congestion for the period 2009 through 2012.

289

Development of Superconducting AC Fault Current Limiter  

Science Journals Connector (OSTI)

The authors have developed a new superconducting fault current limiter whose impedance during normal operation is very small. During fault conditions, the limiter behaves as a superconducting reactor. The limiter

Daisuke Ito; Eriko Yoneda; Tsutomu Fujioka…

1990-01-01T23:59:59.000Z

290

Test on Superconducting AC Fault Current Limiter  

Science Journals Connector (OSTI)

The authors have developed a new superconducting fault current limiter whose impedance during normal operation is very small. During fault conditions, the limiter behaves as a superconducting reactor. The limiter

Daisuke Ito; Eriko S. Yoneda…

1990-01-01T23:59:59.000Z

291

Pure Phase Solubility Limits: LANL  

SciTech Connect (OSTI)

The natural and engineered system at Yucca Mountain (YM) defines the site-specific conditions under which one must determine to what extent the engineered and the natural geochemical barriers will prevent the release of radioactive material from the repository. Most important mechanisms for retention or enhancement of radionuclide transport include precipitation or co-precipitation of radionuclide-bearing solid phases (solubility limits), complexation in solution, sorption onto surfaces, colloid formation, and diffusion. There may be many scenarios that could affect the near-field environment, creating chemical conditions more aggressive than the conditions presented by the unperturbed system (such as pH changes beyond the range of 6 to 9 or significant changes in the ionic strength of infiltrated waters). For an extended period of time, the near-field water composition may be quite different and more extreme in pH, ionic strength, and CO{sub 2} partial pressure (or carbonate concentration) than waters at some distance from the repository. Reducing conditions, high pH (up to 11), and low carbonate concentration may be present in the near-field after reaction of infiltrating groundwater with engineered barrier systems, such as cementitious materials. In the far-field, conditions are controlled by the rock-mass buffer providing a near-neutral, oxidizing, low-ionic-strength environment that controls radionuclide solubility limits and sorption capacities. There is the need for characterization of variable chemical conditions that affect solubility, speciation, and sorption reactions. Modeling of the groundwater chemistry is required and leads to an understanding of solubility and speciation of the important radionuclides. Because experimental studies cannot be performed under the numerous potential chemical conditions, solubility limitations must rely on geochemical modeling of the radionuclide's chemistry. Fundamental thermodynamic properties, such as solubility products, complex stability constants, and redox potentials for radionuclides in different oxidation states, form the underlying database to be used for those calculations. The potentially low solubilities of many radionuclides in natural waters constitute the first barrier for their migration from the repository into the environment. Evaluation of this effect requires a knowledge of the site-specific water chemistry and the expected spatial and temporal ranges of its variability. Quantitative determinations of radionuclide solubility in waters within the range of chemistry must be made. Speciation and molecular complexation must be ascertained to interpret and apply solubility results. The solubilities thus determined can be used to assess the effectiveness of solubility in limiting radionuclide migration. These solubilities can also be used to evaluate the effectiveness of other retardation processes expected to occur once dissolution of the source material and migration begin. Understanding the solubility behavior of radionuclides will assist in designing valuable sorption experiments that must be conducted below the solubility limit since only soluble species participate in surface reactions and sorption processes. The present strategy for radionuclide solubility tasks has been to provide a solubility model from bulk-experiments that attempt to bracket the estimate made for this Analysis and Modeling Report (AMR) of water conditions on site. The long-term goal must be to develop a thermodynamic database for solution speciation and solid-state determination as a prerequisite for transport calculations and interpretation of empirical solubility data. The model has to be self-consistent and tested against known solubility studies in order to predict radionuclide solubilities over the continuous distribution ranges of potential water compositions for performance assessment of the site. Solubility studies upper limits for radionuclide concentrations in natural waters. The concentration in the aqueous phase is controlled by the radionuclide-bearing solid phase and by

C. Stockman

2001-01-26T23:59:59.000Z

292

Summary of Superconducting Fault Current Limiter Technology  

Science Journals Connector (OSTI)

In recent years, superconducting fault current limiter (SFCL) has become one of the forefront topics of current-limiting technology in the world. In this...

Linmang Wang; Pengzan Jiang; Dada Wang

2012-01-01T23:59:59.000Z

293

Colony Mills Limited | Open Energy Information  

Open Energy Info (EERE)

Limited Place: Lahore, Pakistan Sector: Solar Product: Yarn manufacturer, plans to set up solar thermal plant. References: Colony Mills Limited1 This article is a stub. You can...

294

Universal Carbon Credits Limited | Open Energy Information  

Open Energy Info (EERE)

Universal Carbon Credits Limited Jump to: navigation, search Name: Universal Carbon Credits Limited Place: London, England, United Kingdom Zip: EC3A6DF Sector: Carbon Product:...

295

Crionaig Power Limited | Open Energy Information  

Open Energy Info (EERE)

Crionaig Power Limited Jump to: navigation, search Name: Crionaig Power Limited Place: United Kingdom Sector: Wind energy Product: Edinburgh-based power company developing wind...

296

Local Generation Limited | Open Energy Information  

Open Energy Info (EERE)

Generation Limited Place: United Kingdom Sector: Biomass Product: UK-based biomass firm developing anaerobic digestion plants. References: Local Generation Limited1 This article...

297

Unit Commitment Considering Generation Flexibility and Environmental Constraints  

SciTech Connect (OSTI)

This paper proposes a new framework for power system unit commitment process, which incorporates the generation flexibility requirements and environmental constraints into the existing unit commitment algorithm. The generation flexibility requirements are to address the uncertainties with large amount of intermittent resources as well as with load and traditional generators, which causes real-time balancing requirements to be variable and less predictable. The proposed flexibility requirements include capacity, ramp and ramp duration for both upward and downward balancing reserves. The environmental constraints include emission allowance for fossil fuel-based generators and ecological regulations for hydro power plants. Calculation of emission rates is formulated. Unit commitment under this new framework will be critical to the economic and reliable operation of the power grid and the minimization of its negative environmental impacts, especially when high penetration levels of intermittent resources are being approached, as required by the renewable portfolio standards in many states.

Lu, Shuai; Makarov, Yuri V.; Zhu, Yunhua; Lu, Ning; Prakash Kumar, Nirupama; Chakrabarti, Bhujanga B.

2010-07-31T23:59:59.000Z

298

Solar System Constraints on Gauss-Bonnet Mediated Dark Energy  

E-Print Network [OSTI]

Although the Gauss-Bonnet term is a topological invariant for general relativity, it couples naturally to a quintessence scalar field, modifying gravity at solar system scales. We determine the solar system constraints due to this term by evaluating the post-Newtonian metric for a distributional source. We find a mass dependent, 1/r^7 correction to the Newtonian potential, and also deviations from the Einstein gravity prediction for light-bending. We constrain the parameters of the theory using planetary orbits, the Cassini spacecraft data, and a laboratory test of Newton's law, always finding extremely tight bounds on the energy associated to the Gauss-Bonnet term. We discuss the relevance of these constraints to late-time cosmological acceleration.

Luca Amendola; Christos Charmousis; Stephen C. Davis

2007-04-02T23:59:59.000Z

299

First cosmological constraints on the Superfluid Chaplygin gas model  

E-Print Network [OSTI]

In this work we set observational constraints of the Superfluid Chaplygin gas model, which gives a unified description of the dark sector of the Universe as a Bose-Einstein condensate (BEC) that behaves as dark energy (DE) while it is in the ground state and as dark matter (DM) when it is in the excited state. We first show and perform the various steps leading to a form of the equations suitable for the observational tests to be carried out. Then, by using a Markov Chain Monte Carlo (MCMC) code, we constrain the model with a sample of cosmology-independent long gamma-ray bursts (LGRBs) calibrated using their Type I Fundamental Plane, as well as the Union2.1 set and observational Hubble parameter data. In this analysis, using our cosmological constraints, we sketch the effective equation of state parameter and deceleration parameter, and we also obtain the redshift of the transition from deceleration to acceleration: $z_t$.

Lazkoz, Ruth; Salzano, Vincenzo

2012-01-01T23:59:59.000Z

300

First cosmological constraints on the Superfluid Chaplygin gas model  

E-Print Network [OSTI]

In this work we set observational constraints of the Superfluid Chaplygin gas model, which gives a unified description of the dark sector of the Universe as a Bose-Einstein condensate (BEC) that behaves as dark energy (DE) while it is in the ground state and as dark matter (DM) when it is in the excited state. We first show and perform the various steps leading to a form of the equations suitable for the observational tests to be carried out. Then, by using a Markov Chain Monte Carlo (MCMC) code, we constrain the model with a sample of cosmology-independent long gamma-ray bursts (LGRBs) calibrated using their Type I Fundamental Plane, as well as the Union2.1 set and observational Hubble parameter data. In this analysis, using our cosmological constraints, we sketch the effective equation of state parameter and deceleration parameter, and we also obtain the redshift of the transition from deceleration to acceleration: $z_t$.

Ruth Lazkoz; Ariadna Montiel; Vincenzo Salzano

2012-11-15T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Lorentz violation at high energy: concepts, phenomena and astrophysical constraints  

E-Print Network [OSTI]

We consider here the possibility of quantum gravity induced violation of Lorentz symmetry (LV). Even if suppressed by the inverse Planck mass such LV can be tested by current experiments and astrophysical observations. We review the effective field theory approach to describing LV, the issue of naturalness, and many phenomena characteristic of LV. We discuss some of the current observational bounds on LV, focusing mostly on those from high energy astrophysics in the QED sector at order E/M_Planck. In this context we present a number of new results which include the explicit computation of rates of the most relevant LV processes, the derivation of a new photon decay constraint, and modification of previous constraints taking proper account of the helicity dependence of the LV parameters implied by effective field theory.

Ted Jacobson; Stefano Liberati; David Mattingly

2005-06-11T23:59:59.000Z

302

Chiral vortons and cosmological constraints on particle physics  

Science Journals Connector (OSTI)

We investigate the cosmological consequences of particle physics theories that admit stable loops of current-carrying string—vortons. In particular, we consider chiral theories where a single fermion zero mode is excited in the string core, such as those arising in supersymmetric theories with a D term. The resulting vortons formed in such theories are expected to be more stable than their nonchiral cousins. General symmetry breaking schemes are considered in which strings formed at one symmetry breaking scale become current carrying at a subsequent phase transition. The vorton abundance is estimated and constraints placed on the underlying particle physics theories from cosmological observations. Our constraints on the chiral theory are considerably more stringent than the previous estimates for more general theories.

Brandon Carter and Anne-Christine Davis

2000-05-02T23:59:59.000Z

303

Solar System Constraints on Gauss-Bonnet Dark Energy  

E-Print Network [OSTI]

Quadratic curvature Gauss-Bonnet gravity may be the solution to the dark energy problem, but a large coupling strength is required. This can lead to conflict with laboratory and planetary tests of Newton's law, as well as light bending. The corresponding constraints are derived. If applied directly to cosmological scales, the resulting bound on the density fraction is |Omega_GB| < 3.6 x 10^-32.

Stephen C. Davis

2007-08-15T23:59:59.000Z

304

Dynamic storage of continuous products under volume constraints  

E-Print Network [OSTI]

Products and Two Tanks with Production Fqual to Demand Case II - Two Products and Three Tanks with Production Equal to Demand Case III ? Two Products and N Tanks w' th Production Equal to Demand Case IV ? Two Products and Two Tanks with Production... Greater than Demand IV GEOMETRIC SOLUTIONS FOR SCHEDULING SHARED FACILITIES WITH INTERFACE CONSTPAINTS. General Constraints and Conditions Product Dominance. Tank Rel. ease Dominance Interpretation of Geometric Solutions. V. GENERAL SOLUTION...

Lewis, Harry Swift

1968-01-01T23:59:59.000Z

305

Constraints and Solutions of Quantum Gravity in Metric Representation  

E-Print Network [OSTI]

We construct the regularised Wheeler-De Witt operator demanding that the algebra of constraints of quantum gravity is anomaly free. We find that for a subset of all wavefunctions being integrals of scalar densities this condition can be satisfied. We proceed to finding exact solutions of quantum gravity being of the form of functionals of volume and average curvature of compact three-manifold.

A. B?aut; J. Kowalski-Glikman

1997-10-07T23:59:59.000Z

306

Phase space coordinates and the Hamiltonian constraint of Regge calculus  

Science Journals Connector (OSTI)

We suggest that the phase space of Regge calculus is spanned by the areas and the deficit angles corresponding to the two-simplexes on the spacelike hypersurface of simplicial spacetime. Our proposal is based on a slight modification of the Ashtekar formulation of canonical gravity. In terms of these phase space coordinates we write an equation which we suggest to be a simplicial version of the Hamiltonian constraint of canonical gravity.

Jarmo Mäkelä

1994-03-15T23:59:59.000Z

307

Perceptual and Attentional Constraints on 1:1 Bimanual Coordination  

E-Print Network [OSTI]

unstable and consequently hard to perform and requiring extensive practice to learn (Swinnen, Lee et al., 1997, Zanone & Kelso, 1992; 1997). Difficulties in performing coordination patterns other than in-phase and anti-phase have been traditionally... attributed to the attraction toward the intrinsic dynamics (in- 3 phase and anti-phase), various structural constraints such as neural crosstalk (Kennerley et al., 2002) and/or time delays associated with the integration of the afferent and efferent...

Kovacs, Attila J.

2011-08-08T23:59:59.000Z

308

An LP-Designed Algorithm for Constraint Satisfaction  

E-Print Network [OSTI]

@watson.ibm.com Abstract. The class Max (r, 2)-CSP consists of constraint satisfaction problems with at most two r ) for binary-valued problems), making it the fastest for Max Cut, but tied for Max 2-Sat. Results The present O(r-valued variables per clause. For instances with n variables and m binary clauses, we present an O(r19m/100 )-time

Scott, Alexander Alexander

309

Dark Energy Constraints from the CTIO Lensing Survey  

Science Journals Connector (OSTI)

We perform a cosmological parameter analysis of the 75 deg2 CTIO lensing survey in conjunction with cosmic microwave background (CMB) and Type Ia supernovae data. For ?CDM cosmologies, we find that the amplitude of the power spectrum at low redshift is given by ?8 = 0.81 (95% confidence level), where the error bound includes both statistical and systematic errors. The total of all systematic errors is smaller than the statistical errors, but they do make up a significant fraction of the error budget. We find that weak lensing improves the constraints on dark energy as well. The (constant) dark energy equation of state parameter, w, is measured to be -0.89 (95% c.l.). Marginalizing over a constant w slightly changes the estimate of ?8 to 0.79 (95% c.l.). We also investigate variable w cosmologies but find that the constraints weaken considerably; next-generation surveys are needed to obtain meaningful constraints on the possible time evolution of dark energy.

Mike Jarvis; Bhuvnesh Jain; Gary Bernstein; Derek Dolney

2006-01-01T23:59:59.000Z

310

Dark Energy Constraints from the CTIO Lensing Survey  

E-Print Network [OSTI]

We perform a cosmological parameter analysis of the 75 square degree CTIO lensing survey in conjunction with CMB and Type Ia supernovae data. For Lambda CDM cosmologies, we find that the amplitude of the power spectrum at low redshift is given by sigma_8 = 0.81 (+0.15,-0.10, 95% c.l.), where the error bar includes both statistical and systematic errors. The total of all systematic errors is smaller than the statistical errors, but they do make up a significant fraction of the error budget. We find that weak lensing improves the constraints on dark energy as well. The (constant) dark energy equation of state parameter, w, is measured to be -0.89 (+0.16,-0.21, 95% c.l.). Marginalizing over a constant $w$ slightly changes the estimate of sigma_8 to 0.79 (+0.17, -0.14, 95% c.l.). We also investigate variable w cosmologies, but find that the constraints weaken considerably; the next generation surveys are needed to obtain meaningful constraints on the possible time evolution of dark energy.

Mike Jarvis; Bhuvnesh Jain; Gary Bernstein; Derek Dolney

2005-02-14T23:59:59.000Z

311

Baryon Oscillations and Dark-Energy Constraints from Imaging Surveys  

E-Print Network [OSTI]

Baryonic oscillations in the galaxy power spectrum have been studied as a way of probing dark-energy models. While most studies have focused on spectroscopic surveys at high redshift, large multi-color imaging surveys have already been planned for the near future. In view of this, we study the prospects for measuring baryonic oscillations from angular statistics of galaxies binned using photometric redshifts. We use the galaxy bispectrum in addition to the power spectrum; this allows us to measure and marginalize over possibly complex galaxy bias mechanisms to get robust cosmological constraints. In our parameter estimation we allow for a weakly nonlinear biasing scheme that may evolve with redshift by two bias parameters in each of ten redshift bins. We find that a multi-color imaging survey that probes redshifts beyond one can give interesting constraints on dark-energy parameters. In addition, the shape of the primordial power spectrum can be measured to better accuracy than with the CMB alone. We explore the impact of survey depth, area, and calibration errors in the photometric redshifts on dark-energy constraints.

Derek Dolney; Bhuvnesh Jain; Masahiro Takada

2004-09-20T23:59:59.000Z

312

On making energy demand and network constraints compatible in the last mile of the power grid  

Science Journals Connector (OSTI)

Abstract In the classical electricity grid power demand is nearly instantaneously matched by power supply. In this paradigm, the changes in power demand in a low voltage distribution grid are essentially nothing but a disturbance that is compensated for by control at the generators. The disadvantage of this methodology is that it necessarily leads to a transmission and distribution network that must cater for peak demand. So-called smart meters and smart grid technologies provide an opportunity to change this paradigm by using demand side energy storage to moderate instantaneous power demand so as to facilitate the supply-demand match within network limitations. A receding horizon model predictive control method can be used to implement this idea. In this paradigm demand is matched with supply, such that the required customer energy needs are met but power demand is moderated, while ensuring that power flow in the grid is maintained within the safe operating region, and in particular peak demand is limited. This enables a much higher utilisation of the available grid infrastructure, as it reduces the peak-to-base demand ratio as compared to the classical control methodology of power supply following power demand. This paper investigates this approach for matching energy demand to generation in the last mile of the power grid while maintaining all network constraints through a number of case studies involving the charging of electric vehicles in a typical suburban low voltage distribution network in Melbourne, Australia.

Iven Mareels; Julian de Hoog; Doreen Thomas; Marcus Brazil; Tansu Alpcan; Derek Jayasuriya; Valentin Müenzel; Lu Xia; Ramachandra Rao Kolluri

2014-01-01T23:59:59.000Z

313

Next generation Higgs bosons: Theory, constraints, and discovery prospects at the Large Hadron Collider  

Science Journals Connector (OSTI)

Particle physics model building within the context of string theory suggests that further copies of the Higgs boson sector may be expected. Concerns regarding tree-level flavor-changing neutral currents are easiest to allay if little or no couplings of next generation Higgs bosons to standard model fermions are allowed. We detail the resulting general Higgs potential and mass spectroscopy in both a standard model extension and a supersymmetric extension. We present the important experimental constraints from meson-meson mixing, loop-induced b?s? decays, and LEP2 direct production limits. We investigate the energy range of the valid perturbation theory of these ideas. In the supersymmetric context we present a class of examples that marginally aids the fine-tuning problem for parameter space where the lightest Higgs boson mass is greater than the standard model limit of 114 GeV. Finally, we study collider physics signatures generic to next generation Higgs bosons, with special emphasis on Ah?hhZ?4b+2l signal events, and describe the capability of discovery at the Large Hadron Collider.

Rick S. Gupta and James D. Wells

2010-03-30T23:59:59.000Z

314

Limited View Angle Iterative CT Reconstruction  

E-Print Network [OSTI]

;Some Prior Literature in Limited View Tomography CT with limited-angle data and few views IRR algorithm Iterative Reconstruction-Reprojection (IRR) : An Algorithm for Limited Data Cardiac- Computed-views and limited-angle data in divergent-beam CT by E. Y. Sidky, CM Kao, and X. Pan (2006) Few-View Projection

315

Limits to power system growth  

SciTech Connect (OSTI)

In the design of space nuclear power systems a variety of conversion techniques may be used, each with its own advantages and disadvantages. A study was performed which analyzed over 120 proposed system designs. The designs were compared to identify the optimum conversion system as a function of power level and find limits to specific mass (kg/kWe) for each power cycle. Furthermore, the component masses were studied to determine which component of the overall design contributes the most to total system mass over a variety of power levels. The results can provide a focus for future research efforts by selecting the best conversion technology for the desired power range, and optimizing the system component which contributes most to the total mass.

Slater, S.M.; Klein, A.C. (Department of Nuclear Engineering, Oregon State University, Corvallis, Oregon 97331 (United States)); Webb, B.J. (Umpqua Research, Inc., P.O. Box 791, Myrtle Creek, Oregon 97457 (United States)); Pauley, K.A. (Battelle Pacific Northwest Laboratory, P.O. Box 999, Richland, Washington 99352 (United States))

1993-01-15T23:59:59.000Z

316

NEW CONSTRAINTS ON COMPANIONS AND DUST WITHIN A FEW AU OF VEGA  

SciTech Connect (OSTI)

We report on high contrast near-infrared ({approx}2.2 {mu}m) observations of Vega obtained with the Palomar Fiber Nuller, a dual sub-aperture rotating coronagraph installed at the Palomar Hale telescope. The data show consistent astrophysical null depth measurements at the {approx_equal} 10{sup -3} level or below for three different baseline orientations spanning 60 deg in azimuth, with individual 1{sigma} uncertainties {<=}7 x 10{sup -4}. These high cancellation and accuracy levels translate into a dynamic range greater than 1000:1 inside the diffraction limit of the 5 m telescope beam. Such high contrast performance is unprecedented in the near-infrared and provides improved constraints on Vega's immediate ({approx_equal}20 to 250 mas, or {approx_equal}0.15 to 2 AU) environment. In particular, our measurements rule out any potential companion in the [0.25-1 AU] region contributing more than 1% of the overall near-infrared stellar flux, with limits as low as 0.2% near 0.6 AU. These are the best upper limits established so far by direct detection for a companion to Vega in this inner region. We also conclude that any dust population contributing a significant ({>=}1%) near-infrared thermal excess can arise only within 0.2 AU of the star, and that it must consist of much smaller grains than in the solar zodiacal cloud. Dust emission from farther than {approx_equal}2 AU is also not ruled out by our observations, but would have to originate in strong scattering, pointing again to very small grains.

Mennesson, B.; Serabyn, E.; Martin, S. R.; Liewer, K.; Mawet, D. [Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099 (United States); Hanot, C., E-mail: bertrand.mennesson@jpl.nasa.gov [AEOS, University of Liege, Allee du 6 Aout, 17 Bat B5c, 4000 Liege (Belgium)

2011-07-20T23:59:59.000Z

317

Photon and graviton mass limits  

SciTech Connect (OSTI)

We review past and current studies of possible long-distance, low-frequency deviations from Maxwell electrodynamics and Einstein gravity. Both have passed through three phases: (1) Testing the inverse-square laws of Newton and Coulomb, (2) Seeking a nonzero value for the rest mass of photon or graviton, and (3) Considering more degrees of freedom, allowing mass while preserving gauge or general-coordinate invariance. For electrodynamics there continues to be no sign of any deviation. Since our previous review the lower limit on the photon Compton wavelength (associated with weakening of electromagnetic fields in vacuum over large distance scale) has improved by four orders of magnitude, to about one astronomical unit. Rapid current progress in astronomical observations makes it likely that there will be further advances. These ultimately could yield a bound exceeding galactic dimensions, as has long been contemplated. Meanwhile, for gravity there have been strong arguments about even the concept of a graviton rest mass. At the same time there are striking observations, commonly labeled 'dark matter' and 'dark energy' that some argue imply modified gravity. This makes the questions for gravity much more interesting. For dark matter, which involves increased attraction at large distances, any explanation by modified gravity would be qualitatively different from graviton mass. Because dark energy is associated with reduced attraction at large distances, it might be explained by a graviton-mass-like effect.

Nieto, Michael [Los Alamos National Laboratory; Goldhaber Scharff, Alfred [SUNY

2008-01-01T23:59:59.000Z

318

Constraints on particle dark matter from cosmic-ray antiprotons  

E-Print Network [OSTI]

Cosmic-ray antiprotons represent an important channel for dark matter indirect-detection studies. Current measurements of the antiproton flux at the top of the atmosphere and theoretical determinations of the secondary antiproton production in the Galaxy are in good agreement, with no manifest deviation which could point to an exotic contribution in this channel. Therefore, antiprotons can be used as a powerful tool for constraining particle dark matter properties. By using the spectrum of PAMELA data from 50 MV to 180 GV in rigidity, we derive bounds on the dark matter annihilation cross section (or decay rate, for decaying dark matter) for the whole spectrum of dark matter annihilation (decay) channels and under different hypotheses of cosmic-rays transport in the Galaxy and in the heliosphere. For typical models of galactic propagation, the constraints are significantly strong, setting a lower bound on the dark matter mass of a "thermal" relic at about 50 -- 90 GeV for hadronic annihilation channels. These bounds are enhanced to about 150 GeV on the dark matter mass, when large cosmic-rays confinement volumes in the Galaxy are considered, and are reduced to 4-5 GeV for annihilation to light quarks (no bound for heavy-quark production) when the confinement volume is small. Bounds for dark matter lighter than few tens of GeV are due to the low energy part of the PAMELA spectrum, an energy region where solar modulation is relevant: to this aim, we have implemented a detailed solution of the transport equation in the heliosphere, which allowed us not only to extend bounds to light dark matter, but also to determine the uncertainty on the constraints arising from solar modulation modeling. Finally, we estimate the impact of soon-to-come AMS-02 data on the antiproton constraints.

N. Fornengo; L. Maccione; A. Vittino

2013-12-12T23:59:59.000Z

319

Constraints on particle dark matter from cosmic-ray antiprotons  

E-Print Network [OSTI]

Cosmic-ray antiprotons represent an important channel for dark matter indirect-detection studies. Current measurements of the antiproton flux at the top of the atmosphere and theoretical determinations of the secondary antiproton production in the Galaxy are in good agreement, with no manifest deviation which could point to an exotic contribution in this channel. Therefore, antiprotons can be used as a powerful tool for constraining particle dark matter properties. By using the spectrum of PAMELA data from 50 MV to 180 GV in rigidity, we derive bounds on the dark matter annihilation cross section (or decay rate, for decaying dark matter) for the whole spectrum of dark matter annihilation (decay) channels and under different hypotheses of cosmic-rays transport in the Galaxy and in the heliosphere. For typical models of galactic propagation, the constraints are significantly strong, setting a lower bound on the dark matter mass of a "thermal" relic at about 50-90 GeV for hadronic annihilation channels. These bounds are enhanced to about 150 GeV on the dark matter mass, when large cosmic-rays confinement volumes in the Galaxy are considered, and are reduced to 4-5 GeV for annihilation to light quarks (no bound for heavy-quark production) when the confinement volume is small. Bounds for dark matter lighter than few tens of GeV are due to the low energy part of the PAMELA spectrum, an energy region where solar modulation is relevant: to this aim, we have implemented a detailed solution of the transport equation in the heliosphere, which allowed us not only to extend bounds to light dark matter, but also to determine the uncertainty on the constraints arising from solar modulation modeling. Finally, we estimate the impact of soon-to-come AMS-02 data on the antiproton constraints.

N. Fornengo; L. Maccione; A. Vittino

2015-01-30T23:59:59.000Z

320

Coupling constant constraints in a nonminimally coupled phantom cosmology  

SciTech Connect (OSTI)

In the paper we investigate observational constraints on coupling to gravity constant parameter {xi} using distant supernovae SNIa data, baryon oscillation peak (BOP), the cosmic microwave background radiation (CMBR) shift parameter, and the H(z) data set. We estimate the value of this parameter to constrain the extended quintessence models with nonminimally coupled to gravity phantom scalar field. The combined analysis of observational data favors a value of {xi} which lies in close neighborhood of the conformal coupling. While our estimations are model dependent they give rise to an indirect bound on the equivalence principle.

Szydlowski, Marek; Hrycyna, Orest; Kurek, Aleksandra [Astronomical Observatory, Jagiellonian University, Orla 171, 30-244 Cracow (Poland) and Mark Kac Complex Systems Research Centre, Jagiellonian University, Reymonta 4, 30-059 Cracow (Poland); Department of Theoretical Physics, Faculty of Philosophy, John Paul II Catholic University of Lublin, Al. Raclawickie 14, 20-950 Lublin (Poland); Astronomical Observatory, Jagiellonian University, Orla 171, 30-244 Cracow (Poland)

2008-01-15T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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.


321

Early universe constraints on time variation of fundamental constants  

SciTech Connect (OSTI)

We study the time variation of fundamental constants in the early Universe. Using data from primordial light nuclei abundances, cosmic microwave background, and the 2dFGRS power spectrum, we put constraints on the time variation of the fine structure constant {alpha} and the Higgs vacuum expectation value without assuming any theoretical framework. A variation in leads to a variation in the electron mass, among other effects. Along the same line, we study the variation of {alpha} and the electron mass m{sub e}. In a purely phenomenological fashion, we derive a relationship between both variations.

Landau, Susana J.; Mosquera, Mercedes E.; Scoccola, Claudia G.; Vucetich, Hector [Departamento de Fisica, FCEyN, Universidad de Buenos Aires, Ciudad Universitaria-Pabellon 1, 1428 Buenos Aires (Argentina); Facultad de Ciencias Astronomicas y Geofisicas. Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata (Argentina); Facultad de Ciencias Astronomicas y Geofisicas. Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata (Argentina); and Instituto de Astrofisica, Paseo del Bosque S/N 1900 La Plata (Argentina); Facultad de Ciencias Astronomicas y Geofisicas. Universidad Nacional de La Plata, Paseo del Bosque S/N 1900 La Plata (Argentina)

2008-10-15T23:59:59.000Z

322

The Solar Heavy Element Abundances: I. Constraints from Stellar Interiors  

E-Print Network [OSTI]

The latest solar atmosphere models include non-LTE corrections and 3D hydrodynamic convection simulations. These models predict a significant reduction in the solar metal abundance, which leads to a serious conflict between helioseismic data and the predictions of solar interiors models. We demonstrate that the helioseismic constraints on the surface convection zone depth and helium abundance combined with stellar interiors models can be used to define the goodness of fit for a given chemical composition. After a detailed examination of the errors in the theoretical models we conclude that models constructed with the older solar abundances are consistent (solar abundance scale are discussed.

Franck Delahaye; Marc Pinsonneault

2005-11-29T23:59:59.000Z

323

Multi-wavelength constraints on the inflationary consistency relation  

E-Print Network [OSTI]

We present the first attempt to use a combination of CMB, LIGO, and PPTA data to constrain both the tilt and the running of primordial tensor power spectrum through constraints on the gravitational wave energy density generated in the early universe. Combining measurements at different cosmological scales highlights how complementary data can be used to test the predictions of early universe models including the inflationary consistency relation. Current data prefers a slightly positive tilt ($n_t = 0.13^{+0.54}_{-0.75}$) and a negative running ($n_{t, {\\rm run}} assumptions regarding the UV cutoff ($k_{\\...

Meerburg, P Daniel; Hadzhiyska, Boryana; Meyers, Joel

2015-01-01T23:59:59.000Z

324

Inequality design limits in optimal aerodynamic shapes  

E-Print Network [OSTI]

of friction. A solution is developed from the variational problem relating the slope of the profile providing the maximum lift-to-drag ratio with the lower bound of the inequality con- straint. CONTENTS Chapter Page INTRODUCTION III IV CALCULUS... variation Lagrangian multiplier Equality constraint CHAPTER I INTRODUCTION The calculus of variations is a branch of calculus concerned with the optimization of integral functions. Considerable interest exists in the use of this branch of calculus...

Seaman, Charles Knight

2012-06-07T23:59:59.000Z

325

Definition: Fault Current Limiter | Open Energy Information  

Open Energy Info (EERE)

Limiter Limiter Jump to: navigation, search Dictionary.png Fault Current Limiter A fault current limiter prevents current in an electrical circuit from exceeding a predetermined level by increasing the electrical impedance of that circuit before the current through the circuit exceeds that level. Fault current limiters are designed so as to minimize the impedance of the circuit under normal conditions to reduce losses, but increase the impedance of the circuit under fault conditions to limit fault current.[1] View on Wikipedia Wikipedia Definition A Fault Current Limiter (FCL) is a device which limits the prospective fault current when a fault occurs (e.g. in a power transmission network). The term includes superconducting devices and non-superconducting devices, however some of the more simple non-superconducting devices (such

326

Gujarat Ambuja Cements Limited | Open Energy Information  

Open Energy Info (EERE)

Ambuja Cements Limited Ambuja Cements Limited Jump to: navigation, search Name Gujarat Ambuja Cements Limited Place Mumbai, India Zip 400 021 Sector Biomass Product Indian cement company. the company installed a 24MW biomass based captive electric generating stations that will provide electricity to Gujarat Ambuja Cements Limitedâ€(tm)s (“GACL”) facility in Ropar, Punjab. References Gujarat Ambuja Cements Limited[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Gujarat Ambuja Cements Limited is a company located in Mumbai, India . References ↑ "Gujarat Ambuja Cements Limited" Retrieved from "http://en.openei.org/w/index.php?title=Gujarat_Ambuja_Cements_Limited&oldid=346290

327

Definition: Fault Current Limiting | Open Energy Information  

Open Energy Info (EERE)

Limiting Limiting Jump to: navigation, search Dictionary.png Fault Current Limiting Fault current limiting can be achieved through sensors, communications, information processing, and actuators that allow the utility to use a higher degree of network coordination to reconfigure the system to prevent fault currents from exceeding damaging levels. Fault current limiting can also be achieved through the implementation of special stand alone devices known as Fault Current Limiters (FCLs) which act to automatically limit high through currents that occur during faults.[1] Related Terms fault, fault current limiter References ↑ SmartGrid.gov 'Description of Functions' Temp LikeLike UnlikeLike You like this.Sign Up to see what your friends like. late:ISGANAttributionsmart grid,smart grid,smart grid,smart grid,

328

DENSITY LIMITS IN TOROIDAL PLASMAS MARTIN GREENWALD  

E-Print Network [OSTI]

(RFP) ---- Spheromaks and FRCs · Physics basis for density limit ---- Neutrals ---- Radiation models as fast terminations · Spheromak and FRC don't have density limit data operation at "optimized" density

Greenwald, Martin

329

Limited Liability Companies and Corporate Business Structures  

E-Print Network [OSTI]

This publication describes limited liability companies and corporate forms of business organization, including S-Corporations and C-Corporations....

Thompson, Bill; Polk, Wade; Hayenga, Wayne

2009-01-07T23:59:59.000Z

330

Relativistic mean-field models and nuclear matter constraints  

SciTech Connect (OSTI)

This work presents a preliminary study of 147 relativistic mean-field (RMF) hadronic models used in the literature, regarding their behavior in the nuclear matter regime. We analyze here different kinds of such models, namely: (i) linear models, (ii) nonlinear {sigma}{sup 3}+{sigma}{sup 4} models, (iii) {sigma}{sup 3}+{sigma}{sup 4}+{omega}{sup 4} models, (iv) models containing mixing terms in the fields {sigma} and {omega}, (v) density dependent models, and (vi) point-coupling ones. In the finite range models, the attractive (repulsive) interaction is described in the Lagrangian density by the {sigma} ({omega}) field. The isospin dependence of the interaction is modeled by the {rho} meson field. We submit these sets of RMF models to eleven macroscopic (experimental and empirical) constraints, used in a recent study in which 240 Skyrme parametrizations were analyzed. Such constraints cover a wide range of properties related to symmetric nuclear matter (SNM), pure neutron matter (PNM), and both SNM and PNM.

Dutra, M.; Lourenco, O.; Carlson, B. V. [Departamento de Fisica, Instituto Tecnologico de Aeronautica-CTA, 12228-900, Sao Jose dos Campos, SP (Brazil); Delfino, A. [Instituto de Fisica, Universidade Federal Fluminense, 24210-150, Boa Viagem, Niteroi, RJ (Brazil); Menezes, D. P.; Avancini, S. S. [Departamento de Fisica, CFM, Universidade Federal de Santa Catarina, CP. 476, CEP 88.040-900, Florianopolis, SC (Brazil); Stone, J. R. [Oxford Physics, University of Oxford, OX1 3PU Oxford (United Kingdom) and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States); Providencia, C. [Centro de Fisica Computacional, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal); Typel, S. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Theorie, Planckstrasse 1,D-64291 Darmstadt (Germany)

2013-05-06T23:59:59.000Z

331

Covariant phase space, constraints, gauge and the Peierls formula  

E-Print Network [OSTI]

It is well known that both the symplectic structure and the Poisson brackets of classical field theory can be constructed directly from the Lagrangian in a covariant way, without passing through the non-covariant canonical Hamiltonian formalism. This is true even in the presence of constraints and gauge symmetries. These constructions go under the names of the covariant phase space formalism and the Peierls bracket. We review both of them, paying more careful attention, than usual, to the precise mathematical hypotheses that they require, illustrating them in examples. Also an extensive historical overview of the development of these constructions is provided. The novel aspect of our presentation is a significant expansion and generalization of an elegant and quite recent argument by Forger & Romero showing the equivalence between the resulting symplectic and Poisson structures without passing through the canonical Hamiltonian formalism as an intermediary. We generalize it to cover theories with constraints and gauge symmetries and formulate precise sufficient conditions under which the argument holds. These conditions include a local condition on the equations of motion that we call hyperbolizability, and some global conditions of cohomological nature. The details of our presentation may shed some light on subtle questions related to the Poisson structure of gauge theories and their quantization.

Igor Khavkine

2014-02-07T23:59:59.000Z

332

LIMITING ABSORPTION PRINCIPLE FOR SINGULARLY PERTURBED OPERATORS  

E-Print Network [OSTI]

LIMITING ABSORPTION PRINCIPLE FOR SINGULARLY PERTURBED OPERATORS WALTER RENGER Abstract. Given an operator H 1 for which a limiting absorption principle holds, we study operators H 2 which are produced that (except for possibly a discrete set of eigenvalues) a limiting absorption principle holds for H 2 . We

333

Constraints on elastic parameters and implications for lithology on VTI media  

SciTech Connect (OSTI)

Energy considerations provide constraints on elastic stiffnesses in media exhibiting transverse isotropy with a vertical axis of symmetry. If the anisotropy is due to thin layers, additional constraints hold. The constraints can be used to provide insight into the mechanisms causing the anisotropy, which in turn gives information about the lithology. These ideas are illustrated by some examples of anisotropic sedimentary rocks and sediments from the literature.

Berge, P.A.

1995-06-02T23:59:59.000Z

334

Constraints on dark energy models from radial baryon acoustic scale measurements  

E-Print Network [OSTI]

We use the radial baryon acoustic oscillation (BAO) measurements of Gaztanaga et al. (2008) to constrain parameters of dark energy models. These constraints are comparable with constraints from other "non-radial" BAO data. The radial BAO data are consistent with the time-independent cosmological constant model but do not rule out time-varying dark energy. When we combine radial BAO and the Kowalski et al. (2008) Union type Ia supernova data we get very tight constraints on dark energy.

Lado Samushia; Bharat Ratra

2008-10-12T23:59:59.000Z

335

Constraints on the density dependence of the symmetry energy from heavy ion collisions  

E-Print Network [OSTI]

Constraints on the Equation of State for symmetric matter (equal neutron and proton numbers) have been extracted from energetic collisions of heavy ions over a range of energies. Collisions of neutron-deficient and neutron-rich heavy ions now provide initial constraints on the EoS of neutron-rich matter at sub-saturation densities from isospin diffusions and neutron proton ratios. This article reviews the experimental constraints on the density dependence of Symmetry Energy at sub-saturation density.

Tsang, M B; Coupland, D; Danielewicz, P; Famiano, F; Hodges, R; Kilburn, M; Lu, F; Lynch, W G; Winkelbauer, J; Youngs, M; Zhang, YingXun

2011-01-01T23:59:59.000Z

336

Constraints on the density dependence of the symmetry energy from heavy ion collisions  

E-Print Network [OSTI]

Constraints on the Equation of State for symmetric matter (equal neutron and proton numbers) have been extracted from energetic collisions of heavy ions over a range of energies. Collisions of neutron-deficient and neutron-rich heavy ions now provide initial constraints on the EoS of neutron-rich matter at sub-saturation densities from isospin diffusions and neutron proton ratios. This article reviews the experimental constraints on the density dependence of Symmetry Energy at sub-saturation density.

M. B. Tsang; Z. Chajecki; D. Coupland; P. Danielewicz; F. Famiano; R. Hodges; M. Kilburn; F. Lu; W. G. Lynch; J. Winkelbauer; M. Youngs; YingXun Zhang

2011-01-19T23:59:59.000Z

337

Carbon Trust Enterprises Limited | Open Energy Information  

Open Energy Info (EERE)

Enterprises Limited Enterprises Limited Jump to: navigation, search Name Carbon Trust Enterprises Limited Place London, United Kingdom Zip WC2A 2AZ Sector Carbon Product Carbon Trust Enterprises creates and invests in new, high growth, carbon reducing businesses. Typically the company focuses on use of mature technologies rather than on technology innovations. References Carbon Trust Enterprises Limited[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Carbon Trust Enterprises Limited is a company located in London, United Kingdom . References ↑ "Carbon Trust Enterprises Limited" Retrieved from "http://en.openei.org/w/index.php?title=Carbon_Trust_Enterprises_Limited&oldid=343250"

338

Impact Capital Partners Limited | Open Energy Information  

Open Energy Info (EERE)

Limited Limited Jump to: navigation, search Name Impact Capital Partners Limited Place Los Angeles, California Zip CA 90067-1509 Product Los Angeles-based, investment intermediary that designs financial solutions and innovative strategies for achieving sustained growth and intrinsic value. References Impact Capital Partners Limited[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Impact Capital Partners Limited is a company located in Los Angeles, California . References ↑ "Impact Capital Partners Limited" Retrieved from "http://en.openei.org/w/index.php?title=Impact_Capital_Partners_Limited&oldid=346814" Categories: Clean Energy Organizations Companies

339

Bharat Electronics Limited BEL | Open Energy Information  

Open Energy Info (EERE)

Limited BEL Limited BEL Jump to: navigation, search Name Bharat Electronics Limited (BEL) Place Bangalore, India Zip 560015 Sector Solar Product Major supplier of products and turnkey systems with expertise in solar products and systems, defence communication, radars & sensors, telecommunication, broadcasting equipments, e-governance networks and other components. References Bharat Electronics Limited (BEL)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Bharat Electronics Limited (BEL) is a company located in Bangalore, India . References ↑ "Bharat Electronics Limited (BEL)" Retrieved from "http://en.openei.org/w/index.php?title=Bharat_Electronics_Limited_BEL&oldid=342709

340

A Constraint between Noncommutative Parameters of Quantum Theories in Noncommutative Space  

E-Print Network [OSTI]

In two-dimensional noncommutive space for the case of both position - position and momentum - momentum noncommuting, a constraint between noncommutative parameters is investigated. The related topic of guaranteeing Bose - Einstein statistics in noncommutive space in the general case are elucidated: Bose - Einstein statistics is guaranteed by the deformed Heisenberg - Weyl algebra itself, independent of dynamics. A special character of a dynamical system is represented by a constraint between noncommutative parameters. The general feature of the constraint for any system is a direct proportionality between noncommutative parameters with a proportional coefficient depending on characteristic parameters of the system under study. The constraint for a harmonic oscillator is illustrated.

Jian-Zu Zhang

2007-01-23T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Haploid genomes illustrate epigenetic constraints and gene dosage effects in mammals  

Science Journals Connector (OSTI)

As part of the Epigenetics Chromatin conference thematic series, Anton Wutz and Martin Leeb discuss how haploid genomes illustrate epigenetic constraints and gene dosage effects in mammals.

Martin Leeb; Anton Wutz

2013-12-05T23:59:59.000Z

342

E-Print Network 3.0 - active kinematic constraint Sample Search...  

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

The 1st Joint International Conference on Multibody System Dynamics May 2527, 2010, Lappeenranta, Finland Summary: the kinematic constraints) and depend thus on all the (passive...

343

Financial Constraints on Investment in an Emerging Market Crisis: An Empirical Investigation of Foreign Ownership  

E-Print Network [OSTI]

Constraints and Corporate Investment,” Brookings Papers onStructure, Liquidity, and Investment: Evidence from JapaneseMarket Inperfections and Investment,” Jour- nal of Economic

Blalock, Garrick; Gertler, Paul J; Levine, David I. I.

2005-01-01T23:59:59.000Z

344

Performance, Market and Manufacturing Constraints relevant to the Industrialization of Thermoelectric Devices  

Broader source: Energy.gov [DOE]

Market pricing of thermoelectric raw materials and processing, cost of manufacture of devices and systems constraints on the viability of a mass market thermoelectric product are discussed

345

Perspectives on quantity-sensitivity and decomposed scalar constraints: A view from Hindi stress  

E-Print Network [OSTI]

24 6.2 WSP VS . P K P ROM . . . . . . . . . .P K P ROM . . . . . . . . . . . . . . . . . . . . . .that the constraint, P K P ROM , often the driving force in

Buchanan, Kendra Nicole

2012-01-01T23:59:59.000Z

346

Classroom Assignment using Constraint Logic Programming Slim Abdennadher, Matthias Saft and Sebastian Will  

E-Print Network [OSTI]

Classroom Assignment using Constraint Logic Programming Slim Abdennadher, Matthias Saft fabdennad, saft, willsg@informatik.uni­muenchen.de Abstract The Classroom Assignment problem consists

Will, Sebastian

347

INTERPRETING THE GLOBAL 21 cm SIGNAL FROM HIGH REDSHIFTS. I. MODEL-INDEPENDENT CONSTRAINTS  

SciTech Connect (OSTI)

The sky-averaged (global) 21 cm signal is a powerful probe of the intergalactic medium (IGM) prior to the completion of reionization. However, so far it has been unclear whether it will provide more than crude estimates of when the universe's first stars and black holes formed, even in the best case scenario in which the signal is accurately extracted from the foregrounds. In contrast to previous work, which has focused on predicting the 21 cm signatures of the first luminous objects, we investigate an arbitrary realization of the signal and attempt to translate its features to the physical properties of the IGM. Within a simplified global framework, the 21 cm signal yields quantitative constraints on the Ly? background intensity, net heat deposition, ionized fraction, and their time derivatives without invoking models for the astrophysical sources themselves. The 21 cm absorption signal is most easily interpreted, setting strong limits on the heating rate density of the universe with a measurement of its redshift alone, independent of the ionization history or details of the Ly? background evolution. In a companion paper, we extend these results, focusing on the confidence with which one can infer source emissivities from IGM properties.

Mirocha, Jordan; Harker, Geraint J. A.; Burns, Jack O., E-mail: jordan.mirocha@colorado.edu [Center for Astrophysics and Space Astronomy, University of Colorado, Campus Box 389, Boulder, CO 80309 (United States)

2013-11-10T23:59:59.000Z

348

Marine biodiversity in the Caribbean UK overseas territories: Perceived threats and constraints to environmental management  

Science Journals Connector (OSTI)

Islands are often considered to be a priority for conservation, because of their relatively high levels of biodiversity and their vulnerability to a range of natural and anthropogenic threats. However, the capacity of islands to conserve and manage biodiversity may depend upon their governance structures. Many island states are affiliated to other countries through an ‘overseas territory’ status, which may provide them with access to resources and support mechanisms, but which may also influence the capacity for local-scale management of environmental issues. The United Kingdom has 12 island Overseas Territories (UKOTs), most of which support biodiversity of high conservation concern. This study investigates perceptions of current and future threats to marine ecosystems and constraints to environmental protection on the six Caribbean UKOTs, through semi-structured interviews with officials from UK and UKOT government departments and non-governmental organisations. Coastal development, pollution and over-fishing were perceived as threats of most concern for the next decade, but climate change was perceived as by far the greatest future threat to the islands' marine ecosystems. However, a series of common institutional limitations that currently constrain mitigation and conservation efforts were also identified, including insufficient personnel and financial support, a lack of long-term, sustainable projects for persistent environmental problems and inadequate environmental legislation. These findings highlight the need for regional cooperation and capacity-building throughout the Caribbean and a more concerted approach to an UKOT environmental management by the UK and UKOTs' governments.

J. Forster; I.R. Lake; A.R. Watkinson; J.A. Gill

2011-01-01T23:59:59.000Z

349

UNDERSTANDING THE EFFECTS OF COMPRESSION AND CONSTRAINTS ON WATER UPTAKE OF FUEL-CELL MEMBRANES  

SciTech Connect (OSTI)

Accurate characterization of polymer-electrolyte fuel cells (PEFCs) requires understanding the impact of mechanical and electrochemical loads on cell components. An essential aspect of this relationship is the effect of compression on the polymer membrane?s water-uptake behavior and transport properties. However, there is limited information on the impact of physical constraints on membrane properties. In this paper, we investigate both theoretically and experimentally how the water uptake of Nafion membrane changes under external compression loads. The swelling of a compressed membrane is modeled by modifying the swelling pressure in the polymer backbone which relies on the changes in the microscopic volume of the polymer. The model successfully predicts the water content of the compressed membrane measured through in-situ swelling-compression tests and neutron imaging. The results show that external mechanical loads could reduce the water content and conductivity of the membrane, especially at lower temperatures, higher humidities, and in liquid water. The modeling framework and experimental data provide valuable insight for the swelling and conductivity of constrained and compressed membranes, which are of interest in electrochemical devices such as batteries and fuel cells.

Kusoglu, Ahmet; Kienitz, Briian; Weber, Adam

2011-08-24T23:59:59.000Z

350

Water constraints on European power supply under climate change: impacts on electricity prices  

Science Journals Connector (OSTI)

Recent warm, dry summers showed the vulnerability of the European power sector to low water availability and high river temperatures. Climate change is likely to impact electricity supply, in terms of both water availability for hydropower generation and cooling water usage for thermoelectric power production. Here, we show the impacts of climate change and changes in water availability and water temperature on European electricity production and prices. Using simulations of daily river flows and water temperatures under future climate (2031–2060) in power production models, we show declines in both thermoelectric and hydropower generating potential for most parts of Europe, except for the most northern countries. Based on changes in power production potentials, we assess the cost-optimal use of power plants for each European country by taking electricity import and export constraints into account. Higher wholesale prices are projected on a mean annual basis for most European countries (except for Sweden and Norway), with strongest increases for Slovenia (12–15%), Bulgaria (21–23%) and Romania (31–32% for 2031–2060), where limitations in water availability mainly affect power plants with low production costs. Considering the long design life of power plant infrastructures, short-term adaptation strategies are highly recommended to prevent undesired distributional and allocative effects.

Michelle T H van Vliet; Stefan Vögele; Dirk Rübbelke

2013-01-01T23:59:59.000Z

351

Distance measurements from supernovae and dark energy constraints  

Science Journals Connector (OSTI)

Constraints on dark energy from current observational data are sensitive to how distances are measured from Type Ia supernova (SN Ia) data. We find that flux averaging of SNe Ia can be used to test the presence of unknown systematic uncertainties, and yield more robust distance measurements from SNe Ia. We have applied this approach to the nearby+SDSS+ESSENCE+SNLS+HST set of 288 SNe Ia, and the “Constitution” set of 397 SNe Ia. Combining the SN Ia data with cosmic microwave background anisotropy data from Wilkinson Microwave Anisotropy Probe 5 yr observations, the Sloan Digital Sky Survey baryon acoustic oscillation measurements, the data of 69 gamma-ray bursts (GRBs) , and the Hubble constant measurement from the Hubble Space Telescope project SHOES, we measure the dark energy density function X(z)??X(z)/?X(0) as a free function of redshift (assumed to be a constant at z>1 or z>1.5). Without the flux averaging of SNe Ia, the combined data using the Constitution set of SNe Ia seem to indicate a deviation from a cosmological constant at ?95% confidence level at 0?z?0.8; they are consistent with a cosmological constant at ?68% confidence level when SNe Ia are flux averaged. The combined data using the nearby+SDSS+ESSENCE+SNLS+HST data set of SNe Ia are consistent with a cosmological constant at 68% confidence level with or without flux averaging of SNe Ia, and give dark energy constraints that are significantly more stringent than that using the Constitution set of SNe Ia. Assuming a flat Universe, dark energy is detected at >98% confidence level for z?0.75 using the combined data with 288 SNe Ia from nearby+SDSS+ESSENCE+SNLS+HST, independent of the assumptions about X(z?1). We quantify dark energy constraints without assuming a flat Universe using the dark energy figure of merit for both X(z) and a dark energy equation-of-state linear in the cosmic scale factor.

Yun Wang

2009-12-21T23:59:59.000Z

352

Radio and gamma-ray constraints on dark matter annihilation in the Galactic center  

SciTech Connect (OSTI)

We determine upper limits on the dark matter (DM) self-annihilation cross section for scenarios in which annihilation leads to the production of electron--positron pairs. In the Galactic center, relativistic electrons and positrons produce a radio flux via synchroton emission, and a gamma-ray flux via bremsstrahlung and inverse Compton scattering. On the basis of archival, interferometric and single-dish radio data, we have determined the radio spectrum of an elliptical region around the Galactic center of extent 3 deg. semimajor axis (along the Galactic plane) and 1 deg. semiminor axis and a second, rectangular region, also centered on the Galactic center, of extent 1.6 deg. x 0.6 deg. The radio spectra of both regions are nonthermal over the range of frequencies for which we have data: 74 MHz-10 GHz. We also consider gamma-ray data covering the same region from the EGRET instrument (about GeV) and from HESS (around TeV). We show how the combination of these data can be used to place robust constraints on DM annihilation scenarios, in a way which is relatively insensitive to assumptions about the magnetic field amplitude in this region. Our results are approximately an order of magnitude more constraining than existing Galactic center radio and gamma-ray limits. For a DM mass of m{sub {chi}=}10 GeV, and an Navarro-Frank-White profile, we find <{sigma}{sub A}v>{<=}fewx10{sup -25} cm{sup 3} s{sup -1}.

Crocker, R. M. [School of Physics, University of Melbourne, 3010, Victoria (Australia); School of Physics, Monash University, 3800, Victoria (Australia); Max Planck Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany); Bell, N. F. [School of Physics, University of Melbourne, 3010, Victoria (Australia); Balazs, C. [School of Physics, Monash University, 3800, Victoria (Australia); Jones, D. I. [Max Planck Institut fuer Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg (Germany)

2010-03-15T23:59:59.000Z

353

Mitigating wind-turbine induced avian mortality: Sensory, aerodynamic and cognitive constraints and options  

Science Journals Connector (OSTI)

Abstract Because of the fast rate of wind-energy development it will become a challenge to verify impacts on birdlife and construe ways to minimise these. Birds colliding with wind turbines are generally perceived as one of the major conflict issues for wind-energy development. Development of effective and practical measures to reduce bird mortality related to offshore and onshore wind energy is therefore paramount to avoid any delay in consenting processes. The expected efficacy of post-construction mitigation measures for wind-turbine induced avian mortality can be expected to be species-specific with regard to audible, optical and biomechanical constraints and options. Species-specific sensory faculties limit the ability to observe a wind turbine in a given circumstance. Their consequent cognitive perception may depend on the possibilities for associating wind turbines with risk, and discriminating these from other sources. Last but not least, perceived risks may only be evaded when their aerodynamic, locomotive physiology enables them to do so in due time. In order to be able to identify and construe functional mitigation measures these aspects need to be taken into account. Measures eliciting a series of intermittent strong stimuli that are variable in frequency may limit habituation effects; these should only be elicited specifically to mitigate imminent collision. Thus measures either adjusting turbine operation or warning/deterring birds approaching turbines are expected to be most functional. Warning signals may either be based on optical or audible stimuli; however, birds? hearing is inferior to humans while their visual acuity and temporal resolution is higher, but with great differences among species. Implementing effective mitigation measures could reduce the general level of conflicts with birdlife and thus enable both the development at new sites, at sites that have been declared having too high conflict levels, and utilise the wind resources better at specific sites without increasing the conflict levels.

R. May; O. Reitan; K. Bevanger; S.-H. Lorentsen; T. Nygĺrd

2015-01-01T23:59:59.000Z

354

Conservative constraints on dark matter annihilation into gamma rays  

SciTech Connect (OSTI)

Using gamma-ray data from observations of the Milky Way, Andromeda (M31), and the cosmic background, we calculate conservative upper limits on the dark matter self-annihilation cross section to monoenergetic gamma rays, <{sigma}{sub A}v>{sub {gamma}}{sub {gamma}}, over a wide range of dark matter masses. (In fact, over most of this range, our results are unchanged if one considers just the branching ratio to gamma rays with energies within a factor of a few of the endpoint at the dark matter mass.) If the final-state branching ratio to gamma rays, Br({gamma}{gamma}), were known, then <{sigma}{sub A}v>{sub {gamma}}{sub {gamma}}/Br({gamma}{gamma}) would define an upper limit on the total cross section; we conservatively assume Br({gamma}{gamma}) > or approx. 10{sup -4}. An upper limit on the total cross section can also be derived by considering the appearance rates of any standard model particles; in practice, this limit is defined by neutrinos, which are the least detectable. For intermediate dark matter masses, gamma-ray-based and neutrino-based upper limits on the total cross section are comparable, while the gamma-ray limit is stronger for small masses and the neutrino limit is stronger for large masses. We comment on how these results depend on the assumptions about astrophysical inputs and annihilation final states, and how GLAST and other gamma-ray experiments can improve upon them.

Mack, Gregory D.; Yueksel, Hasan [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Jacques, Thomas D.; Bell, Nicole F. [School of Physics, The University of Melbourne, Victoria 3010 (Australia); Beacom, John F. [Department of Physics, Ohio State University, Columbus, Ohio 43210 (United States); Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, Ohio 43210 (United States); Department of Astronomy, Ohio State University, Columbus, Ohio 43210 (United States)

2008-09-15T23:59:59.000Z

355

DOE Order 458.1 Property Clearance Requirements and Factors Considered to Update Its Clearance Limits  

Broader source: Energy.gov [DOE]

DOE Order 458.1 Property Clearance Requirements and Factors Considered to Update Its Clearance Limits Carlos Corredor*, U.S. Department of Energy ;Gustavo Vasquez, U.S. Department of Energy; Derek Favret, U.S. Department of Energy This presentation will provide an explanation of the property clearance requirements contained in DOE O 458.1, including the methods to release or clear property: process knowledge and authorized limits. In addition, it will provide a special focus on the efforts to update the surface guidelines table in DOE directives. In planning to update its property clearance criteria DOE is considering many factors; such as their protectiveness, whether they are dose-based, consistency with voluntary consensus standards and national and international radiation protection recommendations, and consistency with DOE dose constraints. One option being considered is a hybrid approach using a national consensus standard for personal property and DOE derived values for real property.

356

Dark radiation from particle decay: cosmological constraints and opportunities  

SciTech Connect (OSTI)

We study particle decay as the origin of dark radiation. After elaborating general properties and useful parametrisations we provide model-independent and easy-to-use constraints from nucleosynthesis, the cosmic microwave background and structure formation. Bounds on branching ratios and mass hierarchies depend in a unique way on the time of decay. We demonstrate their power to exclude well-motivated scenarios taking the example of the lightest ordinary sparticle decaying into the gravitino. We point out signatures and opportunities in cosmological observations and structure formation. For example, if there are two dark decay modes, dark radiation and the observed dark matter with adjustable free-streaming can originate from the same decaying particle, solving small-scale problems of structure formation. Hot dark matter mimicking a neutrino mass scale as deduced from cosmological observations can arise and possibly be distinguished after a discovery. Our results can be used as a guideline for model building.

Hasenkamp, Jasper; Kersten, Jörn, E-mail: Jasper.Hasenkamp@desy.de, E-mail: Joern.Kersten@desy.de [II. Institute for Theoretical Physics, University of Hamburg, 22761 Hamburg (Germany)

2013-08-01T23:59:59.000Z

357

Dark radiation from particle decay: cosmological constraints and opportunities  

E-Print Network [OSTI]

We study particle decay as the origin of dark radiation. After elaborating general properties and useful parametrisations we provide model-independent and easy-to-use constraints from nucleosynthesis, the cosmic microwave background and structure formation. Bounds on branching ratios and mass hierarchies depend in a unique way on the time of decay. We demonstrate their power to exclude well-motivated scenarios taking the example of the lightest ordinary sparticle decaying into the gravitino. We point out signatures and opportunities in cosmological observations and structure formation. For example, if there are two dark decay modes, dark radiation and the observed dark matter with adjustable free-streaming can originate from the same decaying particle, solving small-scale problems of structure formation. Hot dark matter mimicking a neutrino mass scale as deduced from cosmological observations can arise and possibly be distinguished after a discovery. Our results can be used as a guideline for model building.

Jasper Hasenkamp; Jörn Kersten

2014-02-13T23:59:59.000Z

358

Solar System Constraints on f(G) Dark Energy  

E-Print Network [OSTI]

Corrections to solar system gravity are derived for f(G) gravity theories, in which a function of the Gauss-Bonnet curvature term is added to the gravitational action. Their effects on Newton's law, as felt by the planets, and on the frequency shift of signals from the Cassini spacecraft, are both determined. Despite the fact that the Gauss-Bonnet term is quadratic in curvature, the resulting constraints are substantial. It is shown that they practically rule out f(G) as a natural explanation for the late-time acceleration of the universe. Possible exceptions are when f(G) reduces to something very close to a cosmological constant, or if the form of the function f is exceptionally fine-tuned.

Stephen C. Davis

2007-09-27T23:59:59.000Z

359

Neural Modeling and Control of Diesel Engine with Pollution Constraints  

E-Print Network [OSTI]

The paper describes a neural approach for modelling and control of a turbocharged Diesel engine. A neural model, whose structure is mainly based on some physical equations describing the engine behaviour, is built for the rotation speed and the exhaust gas opacity. The model is composed of three interconnected neural submodels, each of them constituting a nonlinear multi-input single-output error model. The structural identi?cation and the parameter estimation from data gathered on a real engine are described. The neural direct model is then used to determine a neural controller of the engine, in a specialized training scheme minimising a multivariable criterion. Simulations show the effect of the pollution constraint weighting on a trajectory tracking of the engine speed. Neural networks, which are ?exible and parsimonious nonlinear black-box models, with universal approximation capabilities, can accurately describe or control complex nonlinear systems, with little a priori theoretical knowledge. The present...

Ouladsine, Mustapha; Dovifaaz, Xavier; 10.1007/s10846-005-3806-y

2009-01-01T23:59:59.000Z

360

Neutron star equations of state with optical potential constraint  

E-Print Network [OSTI]

Nuclear matter and neutron stars are studied in the framework of an extended relativistic mean-field (RMF) model with higher-order derivative and density dependent couplings of nucleons to the meson fields. The derivative couplings lead to an energy dependence of the scalar and vector self-energies of the nucleons. It can be adjusted to be consistent with experimental results for the optical potential in nuclear matter. Several parametrisations, which give identical predictions for the saturation properties of nuclear matter, are presented for different forms of the derivative coupling functions. The stellar structure of spherical, non-rotating stars is calculated for these new equations of state (EoS). A substantial softening of the EoS and a reduction of the maximum mass of neutron stars is found if the optical potential constraint is satisfied.

Antic, Sofija

2015-01-01T23:59:59.000Z

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


361

Neutron star equations of state with optical potential constraint  

E-Print Network [OSTI]

Nuclear matter and neutron stars are studied in the framework of an extended relativistic mean-field (RMF) model with higher-order derivative and density dependent couplings of nucleons to the meson fields. The derivative couplings lead to an energy dependence of the scalar and vector self-energies of the nucleons. It can be adjusted to be consistent with experimental results for the optical potential in nuclear matter. Several parametrisations, which give identical predictions for the saturation properties of nuclear matter, are presented for different forms of the derivative coupling functions. The stellar structure of spherical, non-rotating stars is calculated for these new equations of state (EoS). A substantial softening of the EoS and a reduction of the maximum mass of neutron stars is found if the optical potential constraint is satisfied.

Sofija Antic; Stefan Typel

2015-01-29T23:59:59.000Z

362

Local air quality constraints on energy growth, 1985-1990  

SciTech Connect (OSTI)

This report examines the potential future conflict between energy growth and environmental protection, from the perspective of siting constraints imposed by requirements of the Clean Air Act Amendments of 1977. County-level projections of additional utility powerplant capacity and increases in industrial coal, oil, and gas consumption are derived for the period 1985 to 1990. Emissions of sulfur dioxide and particulate matter, after the application of appropriate control systems, are converted to changes in ambient air quality using a proportional modeling approach. These changes are then compared with Nonattainment and Prevention of Significant Deterioration requirements, and the energy activity is considered to be constrained if a violation is projected. Total percentages of constrained energy activity are developed for the nation, and the geographical patterns of significant impacts are presented.

Streets, D.G.

1980-03-01T23:59:59.000Z

363

Irreversible Thermodynamics of the Universe: Constraints from Planck Data  

E-Print Network [OSTI]

The present work deals with irreversible Universal thermodynamics. The homogenous and isotropic flat model of the universe is chosen as open thermodynamical system and non-equilibrium thermodynamics comes into picture due to the mechanism of particle creation. For simplicity, entropy flow is considered only due to heat conduction. Further, due to Maxwell-Cattaneo modified Fourier law for non-equilibrium phenomenon, the temperature satisfies damped wave equation instead of heat conduction equation. Validity of generalized second law of thermodynamics (GSLT) has been investigated for Universe bounded by apparent or event horizon with cosmic substrutum as perfect fluid with constant or variable equation of state or interacting dark species. Finally, we have used three Planck data sets to constrain the thermal conductivity \\lambda and the coupling parameter b^2. These constraints must be satisfied in order for GSLT to hold for Universe bounded by apparent or event horizons.

Subhajit Saha; Atreyee Biswas; Subenoy Chakraborty

2014-04-04T23:59:59.000Z

364

Observational constraints on dark energy and cosmic curvature  

Science Journals Connector (OSTI)

Current observational bounds on dark energy depend on our assumptions about the curvature of the universe. We present a simple and efficient method for incorporating constraints from cosmic microwave background (CMB) anisotropy data and use it to derive constraints on cosmic curvature and dark energy density as a free function of cosmic time using current CMB, Type Ia supernova (SN Ia), and baryon acoustic oscillation data. We show that there are two CMB shift parameters, R??mH02r(zCMB) (the scaled distance to recombination) and la??r(zCMB)/rs(zCMB) (the angular scale of the sound horizon at recombination), with measured values that are nearly uncorrelated with each other. Allowing nonzero cosmic curvature, the three-year WMAP (Wilkinson Microwave Anisotropy Probe) data give R=1.71±0.03, la=302.5±1.2, and ?bh2=0.02173±0.00082, independent of the dark energy model. The corresponding bounds for a flat universe are R=1.70±0.03, la=302.2±1.2, and ?bh2=0.022±0.00082. We give the covariance matrix of (R,la,?bh2) from the three-year WMAP data. We find that (R,la,?bh2) provide an efficient and intuitive summary of CMB data as far as dark energy constraints are concerned. Assuming the Hubble Space Telescope (HST) prior of H0=72±8??(km/s)?Mpc-1, using 182 SNe Ia (from the HST/GOODS program, the first year Supernova Legacy Survey, and nearby SN Ia surveys), (R,la,?bh2) from WMAP three-year data, and SDSS (Sloan Digital Sky Survey) measurement of the baryon acoustic oscillation scale, we find that dark energy density is consistent with a constant in cosmic time, with marginal deviations from a cosmological constant that may reflect current systematic uncertainties or true evolution in dark energy. A flat universe is allowed by current data: ?k=-0.006-0.012-0.025+0.013+0.025 for assuming that the dark energy equation of state wX(z) is constant, and ?k=-0.002-0.018-0.032+0.018+0.041 for wX(z)=w0+wa(1-a) (68% and 95% confidence levels). The bounds on cosmic curvature are less stringent if dark energy density is allowed to be a free function of cosmic time, and are also dependent on the assumption about the early time property of dark energy. We demonstrate this by studying two examples. Significant improvement in dark energy and cosmic curvature constraints is expected as a result of future dark energy and CMB experiments.

Yun Wang and Pia Mukherjee

2007-11-30T23:59:59.000Z

365

A constraint on a varying proton--electron mass ratio 1.5 billion years after the Big Bang  

E-Print Network [OSTI]

A molecular hydrogen absorber at a lookback time of 12.4 billion years, corresponding to 10$\\%$ of the age of the universe today, is analyzed to put a constraint on a varying proton--electron mass ratio, $\\mu$. A high resolution spectrum of the J1443$+$2724 quasar, which was observed with the Very Large Telescope, is used to create an accurate model of 89 Lyman and Werner band transitions whose relative frequencies are sensitive to $\\mu$, yielding a limit on the relative deviation from the current laboratory value of $\\Delta\\mu/\\mu=(-9.5\\pm5.4_{\\textrm{stat}} \\pm 5.3_{\\textrm{sys}})\\times 10^{-6}$.

Bagdonaite, J; Murphy, M T; Whitmore, J B

2015-01-01T23:59:59.000Z

366

Constraints on neutrino-nucleon interactions at energies of 1 EeV with the IceCube Neutrino Observatory  

Science Journals Connector (OSTI)

A search for extremely high energy cosmic neutrinos has been carried out with the IceCube Neutrino Observatory. The main signals in the search are neutrino-induced energetic charged leptons and their rate depends on the neutrino-nucleon cross section. The upper limit on the neutrino flux has implications for possible new physics beyond the standard model such as the extra space-time dimension scenarios which lead to a cross section much higher than the standard particle physics prediction. In this study we constrain the neutrino-nucleon cross section at energies beyond 109??GeV with the IceCube observation. The constraints are obtained as a function of the extraterrestrial neutrino flux in the relevant energy range, which accounts for the astrophysical uncertainty of neutrino production models.

Shigeru Yoshida

2010-11-22T23:59:59.000Z

367

Review: constraint programming for air traffic management: A survey1  

Science Journals Connector (OSTI)

Air traffic management (ATM) under its current paradigm is reaching its structural limits considering the continuously growing demand. The need for a decrease in traffic workload opens numerous problems for optimization, from capacity balancing to conflict ...

Cyril Allignol; Nicolas Barnier; Pierre Flener; Justin Pearson

2012-07-01T23:59:59.000Z

368

Geologic constraints on clandestine nuclear testing in South Asia  

Science Journals Connector (OSTI)

...strict limits on the development of highly compact and easily delivered multistage thermonuclear weapons and other advanced nuclear weaponry. High-yield thermonuclear weapons cannot be triggered by primaries of just a few kilotons (1), so a...

Dan M. Davis; Lynn R. Sykes

1999-01-01T23:59:59.000Z

369

EU Energy Wind Limited | Open Energy Information  

Open Energy Info (EERE)

energy Product: The company will be concentrating initially on bringing an innovative composite wind tower to market. References: EU Energy (Wind) Limited1 This article is a...

370

Power Projects Limited | Open Energy Information  

Open Energy Info (EERE)

Power Projects Limited Address: PO Box 25456 Panama Street Place: Wellington Zip: 6146 Region: New Zealand Sector: Marine and Hydrokinetic Year Founded: 2001 Website: http:...

371

Unionmet Singapore Limited | Open Energy Information  

Open Energy Info (EERE)

search Name: Unionmet (Singapore) Limited Place: Singapore Zip: 68805 Product: A manufacturer and recycler of indium - a raw material for CIGS PV and also for most transparent...

372

A distributed Approach for Access and Visibility Task under Ergonomic Constraints with a Manikin  

E-Print Network [OSTI]

A distributed Approach for Access and Visibility Task under Ergonomic Constraints with a Manikin, to assess an efficient path planner for a manikin for access and visibility task under ergonomic constraints a way to explore areas such as maintenance or ergonomics of the product that were traditionally ignored

Paris-Sud XI, Université de

373

Scheduling Job Families on Non-Identical Parallel Machines under Run-To-Run Control Constraints  

E-Print Network [OSTI]

1 Scheduling Job Families on Non-Identical Parallel Machines under Run-To-Run Control Constraints A}@emse.fr Keywords: Scheduling, Parallel Machines, Advanced Process Control, Time Constraint, Integer Linear), Run to Run control (R2R), and more recently Virtual Metrology (VM). Scheduling and APC are usually

Paris-Sud XI, Université de

374

CP(Graph): Introducing a Graph Computation Domain in Constraint Programming  

E-Print Network [OSTI]

CP(Graph): Introducing a Graph Computation Domain in Constraint Programming Gregoire Dooms, Yves constraint programming by introducing CP(Graph), a new computation domain focused on graphs including a new and its associated propagator are sketched. CP(Graph) is in- tegrated with finite domain and finite sets

Deville, Yves

375

SYNTHESIS OF SUPERVISED CONTROLLER BASED ON BOOLEAN CONSTRAINTS AND BOOLEAN AUTOMATA  

E-Print Network [OSTI]

SYNTHESIS OF SUPERVISED CONTROLLER BASED ON BOOLEAN CONSTRAINTS AND BOOLEAN AUTOMATA P. Marangé, A to synthesis controllers, an essential step is the modelling of both plant and constraints. However, this step of the Kumar algorithm synthesis adequated to these new modelling. To conclude, we show that our synthesis

Paris-Sud XI, Université de

376

CONSTRAINTS ON LASER-DRIVEN ACCELERATORS FOR A HIGH-ENERGY LINEAR COLLIDER*  

E-Print Network [OSTI]

CONSTRAINTS ON LASER-DRIVEN ACCELERATORS FOR A HIGH-ENERGY LINEAR COLLIDER* J.S. Wurtele and AV on 1 TeV) are applied to free-space laser and laser/plasma accelerators. It is shown that the requirements impose very severe constraints upon the new accelerators-- so severe, that it seems unlikely

Wurtele, Jonathan

377

Recovery of Low Rank Matrices Under Affine Constraints via a Smoothed Rank Function  

E-Print Network [OSTI]

1 Recovery of Low Rank Matrices Under Affine Constraints via a Smoothed Rank Function Mohammadreza Jutten, Fellow, IEEE Abstract--In this paper, the problem of matrix rank mini- mization under affine constraints is addressed. The state-of-the- art algorithms can recover matrices with a rank much less than

Paris-Sud XI, Université de

378

Video Description Length Guided Constant Quality Video Coding with Bitrate Constraint  

E-Print Network [OSTI]

Video Description Length Guided Constant Quality Video Coding with Bitrate Constraint Lei Yang propose a new video encoding strategy -- Video description length guided Constant Quality video coding with Bitrate Constraint (V-CQBC), for large scale video transcoding systems of video charing websites

Tomkins, Andrew

379

Trapped in the darkness of the night: thermal and energetic constraints of daylight flight in bats  

Science Journals Connector (OSTI)

...darkness of the night: thermal and energetic constraints...absorb short-wave solar radiation. We hypothesized...short-wave (visible) solar radiation may drive...other hand, do not overheat because feathers...whether bats face thermal and energetic constraints...natural levels of solar radiation and ambient...

2011-01-01T23:59:59.000Z

380

Optimal transition from coal to gas and renewable power under capacity constraints and adjustment costs  

E-Print Network [OSTI]

Optimal transition from coal to gas and renewable power under capacity constraints and adjustment existing coal power plants to gas and renewable power under a carbon budget. It solves a model of polluting, exhaustible resources with capacity constraints and adjustment costs (to build coal, gas, and renewable power

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "marketplace constraints limit" 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

WORKING PAPER N 2008 -26 Credit constraints and the cyclicality of R&D investment  

E-Print Network [OSTI]

WORKING PAPER N° 2008 - 26 Credit constraints and the cyclicality of R&D investment: Evidence from SUP�RIEURE halshs-00586744,version1-18Apr2011 #12;Credit Constraints and the Cyclicality of R&D Investment main results can be summarized as follows: (i) the share of R&D investment over total investment

Paris-Sud XI, Université de

382

Handling Constraints In Robust Multi-Objective Optimization Himanshu Gupta and Kalyanmoy Deb  

E-Print Network [OSTI]

pragmatic and the procedure is now ready to be applied to real-world problems. 1 Introduction Research-objective optimization procedure remains incomplete. In this paper, we present a constraint-handling scheme. We inheritHandling Constraints In Robust Multi-Objective Optimization Himanshu Gupta and Kalyanmoy Deb Kanpur

Coello, Carlos A. Coello

383

Proceedings of the 1st workshop on Constraints in Software Testing, Verification and Analysis  

E-Print Network [OSTI]

Proceedings of the 1st workshop on Constraints in Software Testing, Verification and Analysis in Software Testing, Verifi- cation and Analysis (CSTVA'06), a workshop of the twelfth International interest in the application of constraint solving techniques to the field of testing and analysis

384

Solving Constraints on the Invisible Bits of the Intermediate Result for Floating-Point Verification  

E-Print Network [OSTI]

Solving Constraints on the Invisible Bits of the Intermediate Result for Floating as the invisible bits. We deal with corner cases that can only be defined via constraints on the intermediate on the invisible bits and the sticky bit, find two inputs for the operation that yield an intermediate result

California at Davis, University of

385

Magma genesis and crustal spreading in the northern neovolcanic zone of Iceland: telluric-magnetotelluric constraints  

Science Journals Connector (OSTI)

......Constraints on temperature beneath Iceland...Symposium on the Development and Use of Geothermal...in the eastern Snake River Plain - Yellowstone...Constraints on temperature beneath Iceland...Symposium on the Development and Use of Geothermal...45,l-16. temperature, J. Geophys......

R. E. Thayer; A. Bjornsson; L. Alvarez; J. F. Hermance

1981-05-01T23:59:59.000Z

386

Analysis of Energy Efficiency in Fading Channels under QoS Constraints  

E-Print Network [OSTI]

Analysis of Energy Efficiency in Fading Channels under QoS Constraints Deli Qiao, Mustafa Cenk delay constraints, is considered. Spectral efficiency­bit energy tradeoff is analyzed in the low efficiency and energy efficiency are impor- tant considerations. Especially in mobile applications, energy

Gursoy, Mustafa Cenk

387

Control of a Bicycle Using Virtual Holonomic Constraints Luca Consolini, Manfredi Maggiore  

E-Print Network [OSTI]

Control of a Bicycle Using Virtual Holonomic Constraints Luca Consolini, Manfredi Maggiore Abstract-- The problem of making a bicycle trace a strictly convex Jordan curve with bounded roll angle and bounded speed of the bicycle as a function of its position along the curve. It is shown that virtual holonomic constraints can

Maggiore, Manfredi

388

Active tokamak limiters: Symmetrizing the edge plasma  

Science Journals Connector (OSTI)

The surface layers of tokamak plasmas are strongly unstable to low-frequency oscillations. The limiter, by imposing a nonaxisymmetric state in the plasma scrape-off layer, may increase the free energy driving the instabilities. An active, two-faced sandwich limiter is proposed to symmetrize the scrape-off layer, thereby minimizing the mismatch between the inner and outer tokamak states.

R. W. Motley

1981-10-01T23:59:59.000Z

389

Classification procedure in limited angle tomography system  

SciTech Connect (OSTI)

In this work we propose the use of limited angle reconstruction algorithms combined with a procedure for defect detection and feature evaluation in three dimensions. The procedure consists of the following steps: acquisition of the X-ray projections, approximated limited angle 3D image reconstruction, and image preprocessing and classification.

Chlewicki, W.; Baniukiewicz, P.; Chady, T.; Brykalski, A. [Faculty of Electrical Engineering, Westpomeranian University of Technology, Szczecin (Poland)

2011-06-23T23:59:59.000Z

390

The Newtonian limit at intermediate energies  

E-Print Network [OSTI]

We study the metric solutions for the gravitational equations in Modified Gravity Models (MGMs). In models with negative powers of the scalar curvature, we show that the Newtonian Limit (NL) is well defined as a limit at intermediate energies, in contrast with the usual low energy interpretation. Indeed, we show that the gravitational interaction is modified at low densities or low curvatures.

J. A. R. Cembranos

2005-07-09T23:59:59.000Z

391

Ultrasonic imaging with limited-diffraction beams  

E-Print Network [OSTI]

Limited-diffraction beams are a class of waves that may be localized in space and time. Theoretically, these beams are propagation invariant and can propagate to an infinite distance without spreading. In practice, when these beams are produced with wave sources of a finite aperture and energy, they have a very large depth of field, meaning that they can keep a small beam width over a large distance. Because of this property, limited-diffraction beams may have applications in various areas such as medical imaging and tissue characterization. In this paper, fundamentals of limited-diffraction beams are reviewed and the studies of these beams are put into a unified theoretical framework. Theory of limited-diffraction beams is further developed. New limited-diffraction solutions to Klein-Gordon Equation and Schrodinger Equation, as well as limited-diffraction solutions to these equations in confined spaces are obtained. The relationship between the transformation that converts any solutions to an (-1)-dimensional wave equation to limited-diffraction solutions of an -dimensional equation and the Lorentz transformation is clarified and extended. The transformation is also applied to the Klein-Gordon Equation. In addition, applications of limited-diffraction beams are summarized.

Jian-yu Lu

2006-03-28T23:59:59.000Z

392

CARD No. 31 Application of Release Limits  

E-Print Network [OSTI]

of calculating the release limits. Section 194.31 specifies that release limits should be calculated based a likelihood of less than one chance in 1,000 of exceeding ten times the quantities calculated according, in particular, the waste unit factor depends solely on the TRU component of waste. Section 194.31 requires

393

Undergraduate Program Time Limits and Work Schedules  

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

Time Limits and Work Schedules Time Limits and Work Schedules Undergraduate Program Time Limits and Work Schedules Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Student Programs (505) 665-8899 Email Time limits The length of participation in the undergraduate program is limited to a maximum of six years for students pursuing a bachelor's degree and three years for students pursuing an associate's degree. Work schedules Year-round students Students participating in some special undergraduate programs, post-baccalaureate appointments, post-master's appointments, and GRA students working on a thesis or dissertation are excluded from the 30-hour per week work restriction.

394

Definition: Stability Limit | Open Energy Information  

Open Energy Info (EERE)

Limit Limit Jump to: navigation, search Dictionary.png Stability Limit The maximum power flow possible through some particular point in the system while maintaining stability in the entire system or the part of the system to which the stability limit refers.[1] Related Terms power, system, stability References ↑ Glossary of Terms Used in Reliability Standards An in LikeLike UnlikeLike You like this.Sign Up to see what your friends like. line Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Stability_Limit&oldid=480505" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load)

395

Limited English Proficiency | Department of Energy  

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

Limited English Proficiency Limited English Proficiency Limited English Proficiency On August 11, 2000, President Clinton signed Executive Order 13166, "Improving Access to Services for Persons with Limited English Proficiency." The Executive Order requires federal agencies, including the Department of Energy, to examine the programs and services they provide, to determine whether there is a need for language assistance for persons with Limited English proficiency (LEP) related to their programs and services, and to develop and implement a system to provide language assistance to LEP persons (where necessary) to ensure they have meaningful access to their programs and services. The Executive Order also requires Federal agencies, including the Department of Energy, to provide guidance to recipients of

396

Graduate Program Time Limits and Work Schedules  

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

Time Limits and Work Schedules Time Limits and Work Schedules Graduate Program Time Limits and Work Schedules Point your career towards LANL: work with the best minds on the planet in an inclusive environment that is rich in intellectual vitality and opportunities for growth. Contact Student Programs (505) 665-8899 Email Time Limits The length of participation in the graduate program is limited as follows: With a bachelor's pursuing a master's degree: 4 years With a bachelor's pursuing a PhD: 7 years With a master's pursuing a second master's degree: 2 years With a master's pursuing a PhD: 4 years With a master's pursuing a master's and PhD in a new field: 6 years Students may remain in the GRA program for up to three months after receiving their PhD. Work schedules Year-round students Students participating in the MBA program, post-baccalaureate appointments,

397

4C Offshore Limited | Open Energy Information  

Open Energy Info (EERE)

4C Offshore Limited 4C Offshore Limited Jump to: navigation, search Name 4C Offshore Limited Place Suffolk, United Kingdom Country United Kingdom Product Project planning, consulting for offshore industries (wind, oil, gas) Year founded 2009 Company Type For Profit Company Ownership Private Small Business No Affiliated Companies 4C Offshore Limited Technology Offshore Wind Phone number +44 (0)1502 509260 Website http://www.4coffshore.com/ References 4C Offshore website[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. 4C Offshore Limited is a company based in Suffolk, United Kingdom. 4C Offshore is an independent marine consulting firm, that provides advice and consulting services in offshore development, particularly renewables and

398

WMAP constraints on the Intra-Cluster Medium  

E-Print Network [OSTI]

We devise a Monte-Carlo based, optimized filter match method to extract the thermal Sunyaev-Zel'dovich (SZ) signature of a catalog of 116 low-redshift X-ray clusters from the first year data release of the Wilkinson Microwave Anisotropy Probe (WMAP). We detect an over-all amplitude for the SZ signal at the ~ 8-sigma level, yielding a combined constraint of f_{gas}h = 0.08 +/- 0.01 (ran) +/- 0.01 (sys) on the gas mass fraction of the Intra-Cluster Medium. We also compile X-ray estimated gas fractions from the literature for our sample, and find that they are consistent with the SZ estimates at the 2-sigma level, while both show an increasing trend with X-ray temperature. Nevertheless, our SZ estimated gas fraction is 30-40% smaller than the concordance LCDM cosmic average. We also express our observations in terms of the SZ flux-temperature relation, and compare it with other observations, as well as numerical studies. Based on its spectral and spatial signature, we can also extract the microwave point source signal of the clusters at the 3-sigma level, which puts the average microwave luminosity (at ~ 41 GHz) of bright cluster members (M_K 5 kev. Our work serves as an example for how correlation of SZ surveys with cluster surveys in other frequencies can significantly increase our physical understanding of the intra-cluster medium.

Niayesh Afshordi; Yen-Ting Lin; Alastair J. R. Sanderson

2004-08-30T23:59:59.000Z

399

Gedanken densities and exact constraints in density functional theory  

SciTech Connect (OSTI)

Approximations to the exact density functional for the exchange-correlation energy of a many-electron ground state can be constructed by satisfying constraints that are universal, i.e., valid for all electron densities. Gedanken densities are designed for the purpose of this construction, but need not be realistic. The uniform electron gas is an old gedanken density. Here, we propose a spherical two-electron gedanken density in which the dimensionless density gradient can be an arbitrary positive constant wherever the density is non-zero. The Lieb-Oxford lower bound on the exchange energy can be satisfied within a generalized gradient approximation (GGA) by bounding its enhancement factor or simplest GGA exchange-energy density. This enhancement-factor bound is well known to be sufficient, but our gedanken density shows that it is also necessary. The conventional exact exchange-energy density satisfies no such local bound, but energy densities are not unique, and the simplest GGA exchange-energy density is not an approximation to it. We further derive a strongly and optimally tightened bound on the exchange enhancement factor of a two-electron density, which is satisfied by the local density approximation but is violated by all published GGA's or meta-GGA’s. Finally, some consequences of the non-uniform density-scaling behavior for the asymptotics of the exchange enhancement factor of a GGA or meta-GGA are given.

Perdew, John P. [Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States) [Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States); Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122 (United States); Ruzsinszky, Adrienn; Sun, Jianwei [Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States)] [Department of Physics, Temple University, Philadelphia, Pennsylvania 19122 (United States); Burke, Kieron [Department of Chemistry and Department of Physics, University of California, Irvine, California 92697 (United States)] [Department of Chemistry and Department of Physics, University of California, Irvine, California 92697 (United States)

2014-05-14T23:59:59.000Z

400

SIMULTANEOUS CONSTRAINTS ON THE NUMBER AND MASS OF RELATIVISTIC SPECIES  

SciTech Connect (OSTI)

Recent indications from both particle physics and cosmology suggest the possible existence of more than three neutrino species. In cosmological analyses the effects of neutrino mass and number of species can in principle be disentangled for fixed cosmological parameters. However, since we do not have perfect measurements of the standard {Lambda} cold dark matter model parameters, some correlation remains between the neutrino mass and number of species, and both parameters should be included in the analysis. Combining the newest observations of several cosmological probes (cosmic microwave background, large-scale structure, expansion rate), we obtain N {sub eff} = 3.58{sup +0.15} {sub -0.16}(68% CL){sup +0.55} {sub -0.53}(95% CL) and {Sigma}m {sub {nu}} < 0.60 eV(95% CL), which are currently the strongest constraints on N {sub eff} and {Sigma}m {sub {nu}} from an analysis including both parameters. The preference for N {sub eff} >3 is at the 2{sigma} level.

Riemer-Sorensen, Signe; Parkinson, David; Davis, Tamara M. [School of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072 (Australia)] [School of Mathematics and Physics, University of Queensland, Brisbane, QLD 4072 (Australia); Blake, Chris, E-mail: signe@physics.uq.edu.au [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122 (Australia)] [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, P.O. Box 218, Hawthorn, VIC 3122 (Australia)

2013-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" 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

MULTIWAVELENGTH CONSTRAINTS ON PULSAR POPULATIONS IN THE GALACTIC CENTER  

SciTech Connect (OSTI)

The detection of radio pulsars within the central few parsecs of the Galaxy would provide a unique probe of the gravitational and magneto-ionic environments in the Galactic center (GC) and, if close enough to Sgr A*, precise tests of general relativity in the strong-field regime. While it is difficult to find pulsars at radio wavelengths because of interstellar scattering, the payoff from detailed timing of pulsars in the GC warrants a concerted effort. To motivate pulsar surveys and help define search parameters for them, we constrain the pulsar number and spatial distribution using a wide range of multiwavelength measurements. These include the five known radio pulsars within 15' of Sgr A*, non-detections in high-frequency pulsar surveys of the central parsec, radio and gamma-ray measurements of diffuse emission, a catalog of radio point sources from an imaging survey, infrared observations of massive star populations in the central few parsecs, candidate pulsar wind nebulae in the inner 20 pc, and estimates of the core-collapse supernova rate based on X-ray measurements. We find that under current observational constraints, the inner parsec of the Galaxy could harbor as many as {approx}10{sup 3} active radio pulsars that are beamed toward Earth. Such a large population would distort the low-frequency measurements of both the intrinsic spectrum of Sgr A* and the free-free absorption along the line of sight of Sgr A*.

Wharton, R. S.; Chatterjee, S.; Cordes, J. M. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Deneva, J. S. [Arecibo Observatory, HC3 Box 53995, Arecibo, PR 00612 (Puerto Rico); Lazio, T. J. W., E-mail: rwharton@astro.cornell.edu [Jet Propulsion Laboratory, California Institute of Technology, M/S 138-308, 4800 Oak Grove Dr., Pasadena, CA 91109 (United States)

2012-07-10T23:59:59.000Z

402

Observational constraints on growth of massive black holes  

E-Print Network [OSTI]

We study the observational constraints on the growth of massive black holes (BHs) in galactic nuclei. We use the velocity dispersions of early-type galaxies obtained by the SDSS and the relation between BH mass and velocity dispersion to estimate the local BH mass density to be 2.5x10^5 Msun/Mpc^3. We also use the QSO luminosity function from the 2dF Redshift Survey to estimate the BH mass density accreted during optically bright QSO phases. The local BH mass density is consistent with the density accreted during optically bright QSO phases if QSOs have an efficiency 0.1. By studying the continuity equation for the BH mass distribution, including the effect of BH mergers, we find relations between the local BH mass function and the QSO luminosity function. If the BH mass is assumed to be conserved during BH mergers, comparison of the predicted relations with the observations suggests that luminous QSOs (L_{bol}>10^{46} erg/s) have a high efficiency (e.g. 0.2), and the growth of high-mass BHs (>10^8 Msun) comes mainly from accretion during optically bright QSO phases, or that luminous QSOs have a super-Eddington luminosity. If luminous QSOs are not accreting with super-Eddington luminosities and the growth of low-mass BHs also occurs mainly during optically bright QSO phases, less luminous QSOs must accrete with a low efficiency 0.1.

Qingjuan Yu; Scott Tremaine

2002-05-16T23:59:59.000Z

403

Precision tip-tilt-piston actuator that provides exact constraint  

DOE Patents [OSTI]

A precision device which can precisely actuate three degrees of freedom of an optic mount, commonly referred to as tip, tilt, and piston. The device consists of three identical flexure mechanisms, an optic mount to be supported and positioned, a structure that supports the flexure mechanisms, and three commercially available linear actuators. The advantages of the precision device is in the arrangement of the constraints offered by the flexure mechanism and not in the particular design of the flexure mechanisms, as other types of mechanisms could be substituted. Each flexure mechanism constrains two degrees of freedom in the plane of the mechanisms and one direction is actuated. All other degrees of freedom are free to move within the range of flexure mechanisms. Typically, three flexure mechanisms are equally spaced in angle about to optic mount and arranged so that each actuated degree of freedom is perpendicular to the plane formed by the optic mount. This arrangement exactly constrains the optic mount and allows arbitrary actuated movement of the plane within the range of the flexure mechanisms. Each flexure mechanism provides a mechanical advantage, typically on the order of 5:1, between the commercially available actuator and the functional point on the optic mount. This improves resolution by the same ratio and stiffness by the square of the ratio.

Hale, Layton C. (Livermore, CA)

1999-01-01T23:59:59.000Z

404

Characterization of evolutionary rates and constraints in three mammalian genomes  

SciTech Connect (OSTI)

We present an analysis of rates and patterns of microevolutionary phenomena that have shaped the human, mouse, and rat genomes since their last common ancestor. We find evidence for a shift in the mutational spectrum between the mouse and rat lineages, with the net effect being a relative increase in GC content in the rat genome. Our estimate for the neutral point substitution rate separating the two rodents is 0.196 substitutions per site, and 0.65 substitutions per site for the tree relating all three mammals. Small insertions and deletions of 1-10 bp in length (''microindels'') occur at approximately 5 percent of the point substitution rate. Inferred regional correlations in evolutionary rates between lineages and between types of sites support the idea that rates of evolution are influenced by local genomic or cell biological context. No substantial correlations between rates of point substitutions and rates of microindels are found, however, implying that the influences that affect these processes are distinct. Finally, we have identified those regions in the human genome that are evolving slowly, which are likely to include functional elements important to human biology. At least 5 percent of the human genome is under substantial constraint, most of which is noncoding.

Cooper, Gregory M.; Brudno, Michael; Stone, Eric A.; Dubchak, Inna; Batzoglou, Serafim; Sidow, Arend

2004-02-15T23:59:59.000Z

405

Analysis of Fuel Ethanol Transportation Activity and Potential Distribution Constraints  

SciTech Connect (OSTI)

This paper provides an analysis of fuel ethanol transportation activity and potential distribution constraints if the total 36 billion gallons of renewable fuel use by 2022 is mandated by EPA under the Energy Independence and Security Act (EISA) of 2007. Ethanol transport by domestic truck, marine, and rail distribution systems from ethanol refineries to blending terminals is estimated using Oak Ridge National Laboratory s (ORNL s) North American Infrastructure Network Model. Most supply and demand data provided by EPA were geo-coded and using available commercial sources the transportation infrastructure network was updated. The percentage increases in ton-mile movements by rail, waterways, and highways in 2022 are estimated to be 2.8%, 0.6%, and 0.13%, respectively, compared to the corresponding 2005 total domestic flows by various modes. Overall, a significantly higher level of future ethanol demand would have minimal impacts on transportation infrastructure. However, there will be spatial impacts and a significant level of investment required because of a considerable increase in rail traffic from refineries to ethanol distribution terminals.

Das, Sujit [ORNL; Peterson, Bruce E [ORNL; Chin, Shih-Miao [ORNL

2010-01-01T23:59:59.000Z

406

Dark energy constraints after the new Planck data  

Science Journals Connector (OSTI)

The Planck Collaboration has recently published maps of the cosmic microwave background radiation with the highest precision. In the standard flat ? cold dark matter framework, Planck data show that the Hubble constant H0 is in tension with that measured by the several direct probes on H0. In this paper, we perform a global analysis from the current observational data in the general dark energy models and find that resolving this tension requires the dark energy model with its equation of state (EOS) w?-1. Firstly, assuming the w to be a constant, the Planck data favor wsurvey” compilation. Consequently the value derived on H0, H0=71.3±2.0??km?s-1?Mpc-1 (68% C.L.) is consistent with that from direct H0 probes. We then investigate the dark energy model with a time-evolving w, and obtain the 68% C.L. constraints w0=-0.81±0.19 and wa=-1.9±1.1 from the Planck data and the “supernova legacy survey” compilation. Current data still slightly favor the quintom dark energy scenario with EOS across the cosmological constant boundary w?-1.

Jun-Qing Xia; Hong Li; Xinmin Zhang

2013-09-03T23:59:59.000Z

407

Observational constraint on the varying speed of light theory  

E-Print Network [OSTI]

The varying speed of light (VSL) theory is controversial. It succeeds in explaining some cosmological problems, but on the other hand it is excluded by mainstream physics because it will shake the foundation of physics. In the present paper, we devote ourselves to test whether the speed of light is varying from the observational data of the type Ia Supernova, Baryon Acoustic Oscillation, Observational $H(z)$ data and Cosmic Microwave Background (CMB). We select the common form $c(t)=c_0a^n(t)$ with the contribution of dark energy and matter, where $c_0$ is the current value of speed of light, $n$ is a constant, and consequently construct a varying speed of light dark energy model (VSLDE). The combined observational data show a much trivial constraint $n=-0.0033 \\pm 0.0045$ at 68.3\\% confidence level, which indicates that the speed of light may be a constant with high significance. By reconstructing the time-variable $c(t)$, we find that the speed of light almost has no variation for redshift $z < 10^{-1}$....

Qi, Jing-Zhao; Liu, Wen-Biao

2014-01-01T23:59:59.000Z

408

Using SCUBA to place upper limits on arcsecond scale CMB anisotropies at 850 microns  

E-Print Network [OSTI]

The SCUBA instrument on the James Clerk Maxwell Telescope has already had an impact on cosmology by detecting relatively large numbers of dusty galaxies at high redshift. Apart from identifying well-detected sources, such data can also be mined for information about fainter sources and their correlations, as revealed through low level fluctuations in SCUBA maps. As a first step in this direction we analyse a small SCUBA data-set as if it were obtained from a Cosmic Microwave Background (CMB) differencing experiment. This enables us to place limits on CMB anisotropy at 850 microns. Expressed as Q_{flat}, the quadrupole expectation value for a flat power spectrum, the limit is 152 microKelvin at 95 per cent confidence, corresponding to C_0^{1/2} < 355 microKelvin for a Gaussian autocorrelation function, with a coherence angle of about 20--25 arcsec; These results could easily be reinterpretted in terms of any other fluctuating sky signal. This is currently the best limit for these scales at high frequency, and comparable to limits at similar angular scales in the radio. Even with such a modest data-set, it is possible to put a constraint on the slope of the SCUBA counts at the faint end, since even randomly distributed sources would lead to fluctuations. Future analysis of sky correlations in more extensive data-sets ought to yield detections, and hence additional information on source counts and clustering.

Colin Borys; Scott C. Chapman; Douglas Scott

1998-08-04T23:59:59.000Z

409

Decoupling limits in multi-sector supergravities  

SciTech Connect (OSTI)

Conventional approaches to cosmology in supergravity assume the existence of multiple sectors that only communicate gravitationally. In principle these sectors decouple in the limit M{sub pl}??. In practice such a limit is delicate: for generic supergravities, where sectors are combined by adding their Kähler functions, the separate superpotentials must contain non-vanishing vacuum expectation values supplementing the naďve global superpotential. We show that this requires non-canonical scaling in the naďve supergravity superpotential couplings to recover independent sectors of globally supersymmetric field theory in the decoupling limit M{sub pl} ? ?.

Achúcarro, Ana; Hardeman, Sjoerd; Schalm, Koenraad; Aalst, Ted van der [Instituut-Lorentz for Theoretical Physics, Universiteit Leiden, Niels Bohrweg 2, Leiden (Netherlands); Oberreuter, Johannes M., E-mail: achucar@lorentz.leidenuniv.nl, E-mail: j.m.oberreuter@uva.nl, E-mail: kschalm@lorentz.leidenuniv.nl, E-mail: vdaalst@lorentz.leidenuniv.nl [Instituut voor Theoretische Fysica, Universiteit van Amsterdam, Science Park 904, Amsterdam (Netherlands)

2013-03-01T23:59:59.000Z

410

The Large Genome Constraint Hypothesis: Evolution, Ecology and Phenotype CHARLES A. KNIGHT1,* , NICOLE A. MOLINARI1  

E-Print Network [OSTI]

The Large Genome Constraint Hypothesis: Evolution, Ecology and Phenotype CHARLES A. KNIGHT1 Accepted: 18 March 2004 Background and Aims If large genomes are truly saturated with unnecessary `junk genome constraint'. We examine the large genome constraint at three scales: evolution, ecology

Petrov, Dmitri

411

Brief paper: Lossless convexification of a class of optimal control problems with non-convex control constraints  

Science Journals Connector (OSTI)

We consider a class of finite time horizon optimal control problems for continuous time linear systems with a convex cost, convex state constraints and non-convex control constraints. We propose a convex relaxation of the non-convex control constraints, ... Keywords: Control of constrained systems, Convex optimization, Guidance, navigation and control of vehicles, Optimal control theory

Behçet Aç?kme?e; Lars Blackmore

2011-02-01T23:59:59.000Z

412

Dose Modeling Evaluations and Technical Support Document For the Authorized Limits Request for the DOE-Owned Property Outside the Limited Area, Paducah Gaseous Diffusion Plant Paducah, Kentucky  

SciTech Connect (OSTI)

Environmental assessments and remediation activities are being conducted by the U.S. Department of Energy (DOE) at the Paducah Gaseous Diffusion Plant (PGDP), Paducah, Kentucky. The Oak Ridge Institute for Science and Education (ORISE), a DOE prime contractor, was contracted by the DOE Portsmouth/Paducah Project Office (DOE-PPPO) to conduct radiation dose modeling analyses and derive single radionuclide soil guidelines (soil guidelines) in support of the derivation of Authorized Limits (ALs) for 'DOE-Owned Property Outside the Limited Area' ('Property') at the PGDP. The ORISE evaluation specifically included the area identified by DOE restricted area postings (public use access restrictions) and areas licensed by DOE to the West Kentucky Wildlife Management Area (WKWMA). The licensed areas are available without restriction to the general public for a variety of (primarily) recreational uses. Relevant receptors impacting current and reasonably anticipated future use activities were evaluated. In support of soil guideline derivation, a Conceptual Site Model (CSM) was developed. The CSM listed radiation and contamination sources, release mechanisms, transport media, representative exposure pathways from residual radioactivity, and a total of three receptors (under present and future use scenarios). Plausible receptors included a Resident Farmer, Recreational User, and Wildlife Worker. single radionuclide soil guidelines (outputs specified by the software modeling code) were generated for three receptors and thirteen targeted radionuclides. These soil guidelines were based on satisfying the project dose constraints. For comparison, soil guidelines applicable to the basic radiation public dose limit of 100 mrem/yr were generated. Single radionuclide soil guidelines from the most limiting (restrictive) receptor based on a target dose constraint of 25 mrem/yr were then rounded and identified as the derived soil guidelines. An additional evaluation using the derived soil guidelines as inputs into the code was also performed to determine the maximum (peak) dose for all receptors. This report contains the technical basis in support of the DOE?s derivation of ALs for the 'Property.' A complete description of the methodology, including an assessment of the input parameters, model inputs, and results is provided in this report. This report also provides initial recommendations on applying the derived soil guidelines.

Boerner, A. J. [Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States). Independent Environmental Assessment and Verification Program; Maldonado, D. G. [Oak Ridge Institute for Science and Education (ORISE), Oak Ridge, TN (United States). Independent Environmental Assessment and Verification Program; Hansen, Tom [Ameriphysics, LLC (United States)

2012-09-01T23:59:59.000Z

413

Carnegie Wave Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Carnegie Wave Energy Limited Carnegie Wave Energy Limited Jump to: navigation, search Name Carnegie Wave Energy Limited Address 1 124 Stirling Highway Place North Fremantle Zip 6159 Sector Marine and Hydrokinetic Year founded 1993 Number of employees 25 Website http://www.carnegiewave.com Region Australia LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This company is listed in the Marine and Hydrokinetic Technology Database. This company is involved in the following MHK Projects: CETO La Reunion CETO3 Garden Island Perth Wave Energy Project PWEP This company is involved in the following MHK Technologies: CETO Wave Energy Technology This article is a stub. You can help OpenEI by expanding it. Retrieved from "http://en.openei.org/w/index.php?title=Carnegie_Wave_Energy_Limited&oldid=678263

414

Limitations and Failures of the Layzer Model  

SciTech Connect (OSTI)

We report several limitations and failure modes of the recently expanded Layzer model for hydrodynamic instabilities. The failures occur for large initial amplitudes, for stable accelerations, and for spikes in two-fluid systems.

Mikaelian, K O

2007-12-21T23:59:59.000Z

415

Climate Prediction: The Limits of Ocean Models  

E-Print Network [OSTI]

We identify three major areas of ignorance which limit predictability in current ocean GCMs. One is the very crude representation of subgrid-scale mixing processes. These processes are parameterized with coefficients whose ...

Stone, Peter H.

416

Limitations on Diversity in Basic Science Departments  

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

ORIGINAL RESEARCH ARTICLE Limitations on Diversity in Basic Science Departments Phoebe S. Leboy 1,2, * and Janice F. Madden 3 It has been over 30 years since the beginning of...

417

Studies on the dynamics of limited filaments  

E-Print Network [OSTI]

A study on the dynamics of filaments in the presence of a diagnostic, conductive limiter is presented. Plasma filaments are coherent structures present in many fusion devices and transport a significant amount of particles ...

Bonde, Jeffrey David

2010-01-01T23:59:59.000Z

418

Language Modeling for limited-data domains  

E-Print Network [OSTI]

With the increasing focus of speech recognition and natural language processing applications on domains with limited amount of in-domain training data, enhanced system performance often relies on approaches involving model ...

Hsu, Bo-June (Bo-June Paul)

2009-01-01T23:59:59.000Z

419

Automated Operating Procedures for Transfer Limits  

E-Print Network [OSTI]

Automated Operating Procedures for Transfer Limits Final Project Report Power Systems Engineering · Illinois · Iowa State · Texas A&M · Washington State · Wisconsin Automated Operating Procedures

420

Infinite volume limit for the dipole gas  

E-Print Network [OSTI]

We consider a classical dipole gas in with low activity and show that the pressure has a limit as the volume goes to infinity. The result is obtained by a renormalization group analysis of the model.

J. Dimock

2009-04-28T23:59:59.000Z

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


421

Tracer transport in the Greenland Ice Sheet: constraints on ice cores and glacial history  

Science Journals Connector (OSTI)

The climate history and dynamics of the Greenland Ice Sheet are studied using a coupled model of the depositional provenance and transport of glacier ice, allowing simultaneous prediction of the detailed isotopic stratigraphy of ice cores at all the major Greenland sites. Adopting a novel method for reconstructing the age–depth relationship, we greatly improve the accuracy of semi-Lagrangian tracer tracking schemes and can readily incorporate an age-dependent ice rheology. The larger aim of our study is to impose new constraints on the glacial history of the Greenland Ice Sheet. Leading sources of uncertainty in the climate and dynamic history are encapsulated in a small number of parameters: the temperature and elevation isotopic sensitivities, the glacial–interglacial precipitation contrast and the effective viscosity of ice in the flow law. Comparing predicted and observed ice layering at ice core sites, we establish plausible ranges for the key model parameters, identify climate and dynamic histories that are mutually consistent and recover the past depositional elevation of ice cores to ease interpretation of their climatic records. With the coupled three-dimensional model of ice dynamics and provenance transport we propose a method to place all the ice core records on a common time scale and use discrepancies to adjust the reconstructed climate history. Analysis of simulated GRIP ice layering and borehole temperature profiles confirms that the GRIP record is sensitive to the dynamic as well as to the climatic history, but not enough to strongly limit speculation on the state of the Greenland Ice Sheet during the Eemian. In contrast, our study indicates that the Dye 3 and Camp Century ice cores are extremely sensitive to ice dynamics and greatly constrain Eemian ice sheet reconstructions. We suggest that the maximum Eemian sea-level contribution of the ice sheet was in the range of 3.5–4.5 m.

Nicolas Lhomme; Garry K.C. Clarke; Shawn J. Marshall

2005-01-01T23:59:59.000Z

422

Core Analysis For The Development And Constraint Of Physical Models Of  

Open Energy Info (EERE)

For The Development And Constraint Of Physical Models Of For The Development And Constraint Of Physical Models Of Geothermal Reservoirs Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Report: Core Analysis For The Development And Constraint Of Physical Models Of Geothermal Reservoirs Details Activities (2) Areas (2) Regions (0) Abstract: Effective reservoir exploration, characterization, and engineering require a fundamental understanding of the geophysical properties of reservoir rocks and fracture systems. Even in the best of circumstances, spatial variability in porosity, fracture density, salinity, saturation, tectonic stress, fluid pressures, and lithology can all potentially produce and/or contribute to geophysical anomalies. As a result, serious uniqueness problems frequently occur when interpreting

423

Constraint preserving boundary conditions for the Z4c formulation of general relativity  

Science Journals Connector (OSTI)

We discuss high-order absorbing constraint preserving boundary conditions for the Z4c formulation of general relativity coupled to the moving puncture family of gauges. We are primarily concerned with the constraint preservation and absorption properties of these conditions. In the frozen coefficient approximation, with an appropriate first-order pseudodifferential reduction, we show that the constraint subsystem is boundary stable on a four-dimensional compact manifold. We analyze the remainder of the initial boundary value problem for a spherical reduction of the Z4c formulation with a particular choice of the puncture gauge. Numerical evidence for the efficacy of the conditions is presented in spherical symmetry.

Milton Ruiz; David Hilditch; Sebastiano Bernuzzi

2011-01-20T23:59:59.000Z

424

Post-Newtonian parameters and constraints on Einstein-aether theory  

Science Journals Connector (OSTI)

We analyze the observational and theoretical constraints on “Einstein-aether theory,” a generally covariant theory of gravity coupled to a dynamical, unit, timelike vector field that breaks local Lorentz symmetry. The results of a computation of the remaining post-Newtonian parameters are reported. These are combined with other results to determine the joint post-Newtonian, vacuum-?erenkov, nucleosynthesis, stability, and positive-energy constraints. All of these constraints are satisfied by parameters in a large two-dimensional region in the four-dimensional parameter space defining the theory.

Brendan Z. Foster and Ted Jacobson

2006-03-15T23:59:59.000Z

425

Origin of Tokamak Density Limit Scalings  

Science Journals Connector (OSTI)

The onset criterion for radiation driven islands [P.?H. Rebut and M. Hugon, Plasma Physics and Controlled Nuclear Fusion Research 1984: Proc. 10th Int. Conf. London, 1984, (IAEA, Vienna, 1985), Vol. 2] in combination with a simple cylindrical model of tokamak current channel behavior is consistent with the empirical scaling of the tokamak density limit [M. Greenwald, Nucl. Fusion 28, 2199 (1988)]. Many other unexplained phenomena at the density limit are consistent with this novel physics mechanism.

D. A. Gates and L. Delgado-Aparicio

2012-04-20T23:59:59.000Z

426

Momentum Trading and Limits to Arbitrage  

E-Print Network [OSTI]

MOMENTUM TRADING AND LIMITS TO ARBITRAGE A Dissertation by WILLIAM JOSEPH ARMSTRONG Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of DOCTOR OF PHILOSOPHY May 2012... Major Subject: Finance MOMENTUM TRADING AND LIMITS TO ARBITRAGE A Dissertation by WILLIAM JOSEPH ARMSTRONG Submitted to the O ce of Graduate Studies of Texas A&M University in partial ful llment of the requirements for the degree of DOCTOR...

Armstrong, William

2012-07-16T23:59:59.000Z

427

Limit theorems for stochastic approximation algorithms  

E-Print Network [OSTI]

We prove a central limit theorem applicable to one dimensional stochastic approximation algorithms that converge to a point where the error terms of the algorithm do not vanish. We show how this applies to a certain class of these algorithms that in particular covers a generalized P\\'olya urn model, which is also discussed. In addition, we show how to scale these algorithms in some cases where we cannot determine the limiting distribution but expect it to be non-normal.

Renlund, Henrik

2011-01-01T23:59:59.000Z

428

Limited-Notice Performance Test Inspectors Guide | Department...  

Office of Environmental Management (EM)

Limited-Notice Performance Test Inspectors Guide Limited-Notice Performance Test Inspectors Guide October 2014 This document describes the Limited-Notice Performance Testing...

429

The local environmental dependence of galaxy properties in the volume-limited sample of Main Galaxies from the SDSS Data Release 5  

E-Print Network [OSTI]

Using a volume-limited sample of Main Galaxies from the SDSS Data Release 5, we investigate the dependence of galaxy properties on local environment. For each galaxy, the local three-dimensional density is calculated. We find that galaxy morphologies strongly depend on local environment: galaxies in dense environments have predominantly early type morphologies, but other galaxy properties do not present significant dependence on local environment. Clearly, this puts a important constraint on proposed physical mechanisms.

Xin-Fa Deng; Ji-Zhou He; Qun Zhang; Cong-Gen He; Peng Jiang; Yong Xin

2006-09-21T23:59:59.000Z

430

CONSTRAINTS ON THE ORIGIN OF COSMIC RAYS ABOVE 10{sup 18} eV FROM LARGE-SCALE ANISOTROPY SEARCHES IN DATA OF THE PIERRE AUGER OBSERVATORY  

SciTech Connect (OSTI)

A thorough search for large-scale anisotropies in the distribution of arrival directions of cosmic rays detected above 10{sup 18} eV at the Pierre Auger Observatory is reported. For the first time, these large-scale anisotropy searches are performed as a function of both the right ascension and the declination and expressed in terms of dipole and quadrupole moments. Within the systematic uncertainties, no significant deviation from isotropy is revealed. Upper limits on dipole and quadrupole amplitudes are derived under the hypothesis that any cosmic ray anisotropy is dominated by such moments in this energy range. These upper limits provide constraints on the production of cosmic rays above 10{sup 18} eV, since they allow us to challenge an origin from stationary galactic sources densely distributed in the galactic disk and emitting predominantly light particles in all directions.

Abreu, P.; Andringa, S. [LIP and Instituto Superior Tecnico, Technical University of Lisbon (Portugal); Aglietta, M. [Istituto di Fisica dello Spazio Interplanetario (INAF), Universita di Torino and Sezione INFN, Torino (Italy); Ahlers, M. [University of Wisconsin, Madison, WI (United States); Ahn, E. J. [Fermilab, Batavia, IL (United States); Albuquerque, I. F. M. [Universidade de Sao Paulo, Instituto de Fisica, Sao Paulo, SP (Brazil); Allard, D. [Laboratoire AstroParticule et Cosmologie (APC), Universite Paris 7, CNRS-IN2P3, Paris (France); Allekotte, I. [Centro Atomico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche (Argentina); Allen, J. [New York University, New York, NY (United States); Allison, P. [Ohio State University, Columbus, OH (United States); Almela, A. [Universidad Tecnologica Nacional - Facultad Regional Buenos Aires, Buenos Aires (Argentina); Castillo, J. Alvarez [Universidad Nacional Autonoma de Mexico, Mexico, D.F. (Mexico); Alvarez-Muniz, J. [Universidad de Santiago de Compostela (Spain); Alves Batista, R. [Universidade Estadual de Campinas, IFGW, Campinas, SP (Brazil); Ambrosio, M.; Aramo, C. [Universita di Napoli 'Federico II' and Sezione INFN, Napoli (Italy); Aminaei, A. [IMAPP, Radboud University Nijmegen (Netherlands); Anchordoqui, L. [University of Wisconsin, Milwaukee, WI (United States); Antici'c, T. [Rudjer Boskovi'c Institute, 10000 Zagreb (Croatia); Arganda, E. [IFLP, Universidad Nacional de La Plata and CONICET, La Plata (Argentina); Collaboration: Pierre Auger Collaboration; and others

2013-01-01T23:59:59.000Z

431

The Role of Incentives in Building Controls Marketplace  

E-Print Network [OSTI]

emissions. Deep deployment of off-the-shelf smart building technologies can cut energy use by at least 30 percent. Outreach, coupled with the help of focused incentives, will allow the building automation and control industry to see the growth... emissions. Deep deployment of off-the-shelf smart building technologies can cut energy use by at least 30 percent. Outreach, coupled with the help of focused incentives, will allow the building automation and control industry to see the growth...

Vanderpool, C.

2011-01-01T23:59:59.000Z

432

INNOVATION MARKETPLACE A QUARTERLY UPDATE OF AVAILABLE TECHNOLOGIES...  

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

focusing further simplifies sun tracking, reducing both the cost and complexity of the solar concentrating design. Small, robust Wireless Passive Radiation Sensor gives immediate...

433

Obstacles and Opportunity: Overcoming Barriers in Today's CHP Marketplace  

E-Print Network [OSTI]

to improve existing incentive programs. By far the most important incentives, according to CHP developers and supporters, are tax incentives or other types of incentives (such as feed-in-tariffs) that offer a set monetary benefit per system output... developers were keen to discuss was a feed-in-tariff (FIT). A FIT is a long-term contract a generator may enter into with a utility to have the generator?s power purchased at a set rate ? typically higher than the wholesale rates that some CHP systems now...

Chittum, A.; Kaufman, N.

2011-01-01T23:59:59.000Z

434

Architektur markt/marked architecture : a new marketplace for Dresden  

E-Print Network [OSTI]

This thesis is an investigation into the design and ideology of public space in the historical core of Dresden, more specifically, public space as it is related to history, commerce, and the monumental in architecture. The ...

Johnson, Carter (Carter deCoursey), 1967-

2000-01-01T23:59:59.000Z

435

Steam Power Partnership: Improving Steam System Efficiency Through Marketplace Partnerships  

E-Print Network [OSTI]

to support the steam efficiency program. Today, the Steam Team includes, the North American Insulation Manufacturers Association (NAIMA), the American Gas Association (AGA), the Council of Industrial Boiler Owners (ClBO), Armstrong International... pinch technology, and high performance steam. ? Armstrong International - Three worldwide factory seminar facilities, 13 North American sales representative facilities, 4 international sales representative facilities, 8 co-sponsored facilities, 2...

Jones, T.

436

Participatory aid marketplace : designing online channels for digital humanitarians  

E-Print Network [OSTI]

Recent years have seen an increase in natural and man-made crises. Information and communication technologies are enabling citizens to contribute creative solutions and participate in crisis response in myriad new ways, ...

Stempeck, Matt (Matt Kelly)

2013-01-01T23:59:59.000Z

437

New Ideas for Seeding Your Solar Marketplace Program Pilots and...  

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

data about the peer networks that spread information about innovations and; (2) the capacity to transform the theory's empirical observations into experimentally-validated...

438

New Ideas for Seeding Your Solar Marketplace Program Pilots and...  

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

solar program pilot 45 min.: Brainstorm a novel format for a future solar program that's able to have demonstrable, measurable, and credible impact. Key questions: What...

439

INNOVATION MARKETPLACE A QUARTERLY UPDATE OF AVAILABLE TECHNOLOGIES FOR INDUSTRY  

E-Print Network [OSTI]

· Heat Flux Sensors · Fuel Cells Highlights From Past Issues · Neutristor · Atomic Magnetometer for remote and unattended sensing applications. Sandia's chemical sensor is able to optimize sample

440

Workshop: New Ideas for Seeding Your Solar Marketplace: Program...  

Office of Environmental Management (EM)

Embedded Experiments May 22, 2014 1:00PM to 8:00PM PDT Avila A & B Solar installers, utilities, non-profit groups, and policymakers are charged with creating on-the-ground solar...

Note: This page contains sample records for the topic "marketplace constraints limit" 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

Monitoring program for radionuclides in marketplace seafoods. Final report  

SciTech Connect (OSTI)

This report presents the results of a monitoring program, conducted in 1981 and 1982, by the Environmental Protection Agency (EPA) and the Food and Drug Administration (FDA) to measure concentrations of man-made radionuclides in seafoods to determine effects from previous U.S. ocean disposals of low-level radioactive wastes (LLW). Commercially-marketed seafood samples were collected from Boston, Massachusetts, Atlantic City, New Jersey and San Francisco, California. Each of these cities is near a previously-used U.S. ocean disposal site for LLW. The data obtained during this monitoring program shows that the concentrations of man-made radioactivity in seafoods sampled are below levels of public health concern. The data are considered to be of normal background level, attributable to global fallout over the oceans.

Curtis, W.R.

1988-06-01T23:59:59.000Z

442

Implications of Direct Dark Matter Constraints for Minimal Supersymmetric Standard Model Higgs Boson Searches at the Tevatron  

E-Print Network [OSTI]

Searches for the Minimal Supersymmetric Standard Model (MSSM) Higgs bosons are among the most promising channels for exploring new physics at the Tevatron. In particular, interesting regions of large $\\tan \\beta$ and small $m_A$ are probed by searches for heavy neutral Higgs bosons, A and H, when they decay to $\\tau^+ \\tau^-$ and $b\\bar{b}$. At the same time, direct searches for dark matter, such as CDMS, attempt to observe neutralino dark matter particles scattering elastically off nuclei. This can occur through t-channel Higgs exchange, which has a large cross section in the case of large $\\tan \\beta$ and small $m_A$. As a result, there is a natural interplay between the heavy, neutral Higgs searches at the Tevatron and the region of parameter space explored by CDMS. We show that if the lightest neutralino makes up the dark matter of our universe, current limits from CDMS strongly constrain the prospects of heavy, neutral MSSM Higgs discovery at the Tevatron (at 3 sigma with 4 fb^-1 per experiment) unless $|\\mu| \\gsim$ 400 GeV. The limits of CDMS projected for 2007 will increase this constraint to $|\\mu| \\gsim$ 800 GeV. On the other hand, if CDMS does observe neutralino dark matter in the near future, it will make the discovery of heavy, neutral MSSM Higgs bosons far more likely at the Tevatron.

Marcela Carena; Dan Hooper; Peter Skands

2006-08-22T23:59:59.000Z

443

THE METALLICITY DISTRIBUTION FUNCTIONS OF SEGUE G AND K DWARFS: CONSTRAINTS FOR DISK CHEMICAL EVOLUTION AND FORMATION  

SciTech Connect (OSTI)

We present the metallicity distribution function (MDF) for 24,270 G and 16,847 K dwarfs at distances from 0.2 to 2.3 kpc from the Galactic plane, based on spectroscopy from the Sloan Extension for Galactic Understanding and Exploration (SEGUE) survey. This stellar sample is significantly larger in both number and volume than previous spectroscopic analyses, which were limited to the solar vicinity, making it ideal for comparison with local volume-limited samples and Galactic models. For the first time, we have corrected the MDF for the various observational biases introduced by the SEGUE target-selection strategy. SEGUE is particularly notable for its sample of K dwarfs, which are too faint to examine spectroscopically far from the solar neighborhood. The MDF of both spectral types becomes more metal-poor with increasing |Z|, which reflects the transition from a sample with small [{alpha}/Fe] values at small heights to one with enhanced [{alpha}/Fe] above 1 kpc. Comparison of our SEGUE distributions to those of two different Milky Way models reveals that both are more metal-rich than our observed distributions at all heights above the plane. Our unbiased observations of G and K dwarfs provide valuable constraints over the |Z|-height range of the Milky Way disk for chemical and dynamical Galaxy evolution models, previously only calibrated to the solar neighborhood, with particular utility for thin- and thick-disk formation models.

Schlesinger, Katharine J. [Research School of Astronomy and Astrophysics, Australian National University, Weston, ACT 2611 (Australia); Johnson, Jennifer A.; Schoenrich, Ralph [Department of Astronomy, The Ohio State University, 140 W 18th Avenue, Columbus, OH 43210 (United States); Rockosi, Constance M. [UCO/Lick Observatory, University of California, Santa Cruz, CA 95064 (United States); Lee, Young Sun [Tombaugh Fellow, Department of Astronomy, New Mexico State University, Las Cruces, NM 88003 (United States); Morrison, Heather L.; Harding, Paul [Department of Astronomy, Case Western Reserve University, Cleveland, OH 44106 (United States); Allende Prieto, Carlos [Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife (Spain); Beers, Timothy C. [Department of Physics and Astronomy and JINA (Joint Institute for Nuclear Astrophysics), Michigan State University, East Lansing, MI 48824 (United States); Yanny, Brian [Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 (United States); Schneider, Donald P. [Department of Astronomy and Astrophysics, Penn State University, 408A Davey Laboratory, University Park, PA 16802 (United States); Chiappini, Cristina; Da Costa, Luiz N.; Maia, Marcio A. G.; Rocha-Pinto, Helio; Santiago, Basilio X. [Laboratorio Interinstitucional de e-Astronomia (LIneA), Rua Gal. Jose Cristino 77, 20921-400 Rio de Janeiro (Brazil); Minchev, Ivan [Leibniz-Institut fuer Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam (Germany)

2012-12-20T23:59:59.000Z

444

Improved Constraints on Isotropic Shift and Anisotropies of the Speed of Light using Rotating Cryogenic Sapphire Oscillators  

E-Print Network [OSTI]

We demonstrate that Michelson-Morley tests, which detect direction-dependent anisotropies in the speed of light, can also be used to place limits upon isotropic deviations of the vacuum speed of light from $c$, as described by the photon sector Standard Model Extension (SME) parameter $\\tilde{\\kappa}_{tr}$. A shift in the speed of light that is isotropic in one inertial frame implies anisotropic shifts in others. Using observer Lorentz covariance, we derive the time-dependent variations in the relative resonance frequencies of a pair of electromagnetic resonators that would be generated by such a shift in the rest frame of the Sun. A new analysis of a recent experimental test of relativity using this result constrains $\\tilde{\\kappa}_{tr}$ with a precision of $7.4\\times10^{-9}$. This represents the first constraint on $\\tilde{\\kappa}_{tr}$ by a Michelson-Morley experiment and the first analysis of a single experiment to simultaneously set limits on all nine non-birefringent terms in the photon sector of the SME.

Michael A. Hohensee; Paul. L. Stanwix; Michael Edmund Tobar; Stephen R. Parker; David F. Phillips; Ronald L. Walsworth

2010-06-07T23:59:59.000Z

445

Improved constraints on isotropic shift and anisotropies of the speed of light using rotating cryogenic sapphire oscillators  

SciTech Connect (OSTI)

We demonstrate that Michelson-Morley tests, which detect direction-dependent anisotropies in the speed of light, can also be used to place limits upon isotropic deviations of the vacuum speed of light from c, as described by the photon-sector standard model extension parameter {kappa}-tilde{sub tr}. A shift in the speed of light that is isotropic in one inertial frame implies anisotropic shifts in others. Using observer Lorentz covariance, we derive the time-dependent variations in the relative resonance frequencies of a pair of electromagnetic resonators that would be generated by such a shift in the rest frame of the Sun. A new analysis of a recent experimental test of relativity using this result constrains {kappa}-tilde{sub tr} with a precision of 7.4x10{sup -9}. This represents the first constraint on {kappa}-tilde{sub tr} by a Michelson-Morley experiment and the first analysis of a single experiment to simultaneously set limits on all nine nonbirefringent terms in the photon sector of the minimal standard model extension.

Hohensee, Michael A. [Department of Physics, Harvard University (United States); Department of Physics, University of California, Berkeley (United States); Stanwix, Paul L. [School of Physics, University of Western Australia (Australia); Harvard-Smithsonian Center for Astrophysics (United States); Tobar, Michael E.; Parker, Stephen R. [School of Physics, University of Western Australia (Australia); Phillips, David F. [Harvard-Smithsonian Center for Astrophysics (United States); Walsworth, Ronald L. [Department of Physics, Harvard University (United States); Harvard-Smithsonian Center for Astrophysics (United States)

2010-10-01T23:59:59.000Z

446

HQFMSP Chapter 2, Limited Areas, Valut-Type Rooms and Temporary Limited  

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

2, Limited Areas, Valut-Type Rooms and Temporary 2, Limited Areas, Valut-Type Rooms and Temporary Limited Areas HQFMSP Chapter 2, Limited Areas, Valut-Type Rooms and Temporary Limited Areas October 2013 2013 Headquarters Facilities Master Security Plan - Chapter 2, Limited Areas, Valut-Type Rooms and Temporary Limited Areas This chapter covers the establishment, maintenance, and termination of areas within HQ buildings where classified activities take place. It covers the requirements applicable to each type of security area, including physical protection measures, controls on the use of electronic devices, restrictions on what security activities can take place, and what security equipment must be present. The procedures in this chapter were developed and are maintained jointly by HS-91 and the Office of Information Security

447

Salinity gradient energy potential in Colombia considering site specific constraints  

Science Journals Connector (OSTI)

Abstract The theoretical potential of salinity gradient energy in river mouth systems is the maximum amount of energy that can be extracted from the controlled mixing of river water and seawater. It is calculated using the Gibbs free energy of mixing equations considering as inputs the mean rivers' discharge and the long term salinity of the ocean basin. However, this theoretical amount of energy can be far from the reality because both, the river discharge and the salinity of the ocean, have natural variations in different time scales. In this paper we expose the site constraints related with the variability of the salinity gradients that must be considered in order to make a more accurate estimation of the available resources and calculate the so-called site specific potential for the most important and feasible river mouths of Colombia. The results show that in Colombia a mean site specific potential of 15.6 GW can be achieved, mainly in the Magdalena River mouth (97% of total). But more important, the results show that the salinity structure of the studied systems have different responses to variations of the environmental forcing, despite being located in the same ocean basin, and therefore, the energy potential for each river mouth has different variability patterns at different time scales. Decreases of the estimated energy potential up to 69% were found when the site specific potential is calculated instead of the theoretical potential. This prove that more detailed input data than long term discharges and salinities are necessary in order to make accurate estimations of local and regional salinity gradient energy potentials.

Oscar Alvarez-Silva; Andrés F. Osorio

2015-01-01T23:59:59.000Z

448

A brightness exceeding simulated Langmuir limit  

SciTech Connect (OSTI)

When an excitation of the first lens determines a beam is parallel beam, a brightness that is 100 times higher than Langmuir limit is measured experimentally, where Langmuir limits are estimated using a simulated axial cathode current density which is simulated based on a measured emission current. The measured brightness is comparable to Langmuir limit, when the lens excitation is such that an image position is slightly shorter than a lens position. Previously measured values of brightness for cathode apical radii of curvature 20, 60, 120, 240, and 480 ?m were 8.7, 5.3, 3.3, 2.4, and 3.9 times higher than their corresponding Langmuir limits, respectively, in this experiment, the lens excitation was such that the lens and the image positions were 180 mm and 400 mm, respectively. From these measured brightness for three different lens excitation conditions, it is concluded that the brightness depends on the first lens excitation. For the electron gun operated in a space charge limited condition, some of the electrons emitted from the cathode are returned to the cathode without having crossed a virtual cathode. Therefore, method that assumes a Langmuir limit defining method using a Maxwellian distribution of electron velocities may need to be revised. For the condition in which the values of the exceeding the Langmuir limit are measured, the simulated trajectories of electrons that are emitted from the cathode do not cross the optical axis at the crossover, thus the law of sines may not be valid for high brightness electron beam systems.

Nakasuji, Mamoru [2-15-11, Serigaya-chou, Kounan-ku, Yokohama-shi, Kanagawa-ken (Japan)] [2-15-11, Serigaya-chou, Kounan-ku, Yokohama-shi, Kanagawa-ken (Japan)

2013-08-15T23:59:59.000Z

449

RLOPF (risk-limiting optimal power flow) for systems with high penetration of wind power  

Science Journals Connector (OSTI)

Abstract In this paper, we formulate a RLOPF (risk-limiting optimal power flow) problem for systems with high penetration of wind power to address the issue of possibly violating the security constraints in power systems due to the volatility of wind power generations. To cope with the computational complexity of the proposed RLOPF problem, we propose a computationally efficient RLOPF algorithm assisted by the off-line constructed probability distribution models for bus voltage magnitudes and transmission line real power flows. We apply the proposed RLOPF algorithm to the RLOPF problems on a 26-bus power system for two cases of significantly different re-dispatching percentage share for non-renewable power generations to compensate the volatility of wind power generations. The test results reveal that the performance of all solutions obtained by the proposed RLOPF algorithm of various step-sizes in both cases meet the required probability 0.95 on satisfying the security constraints in the presence of variable wind power generations, and the CPU time consumption are mostly within 1 s. We also test the performance of conventional OPF (optimal power flow) solution on both cases, and the resulted probability are all smaller than 0.783. These test results demonstrate the merit and the computational efficiency of the proposed RLOPF algorithm.

Shin-Yeu Lin; Ai-Chih Lin

2014-01-01T23:59:59.000Z

450

V-040: Apache Tomcat Bug Lets Remote Users Bypass Security Constraints |  

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

0: Apache Tomcat Bug Lets Remote Users Bypass Security 0: Apache Tomcat Bug Lets Remote Users Bypass Security Constraints V-040: Apache Tomcat Bug Lets Remote Users Bypass Security Constraints December 5, 2012 - 1:00am Addthis PROBLEM: Apache Tomcat Bug Lets Remote Users Bypass Security Constraints PLATFORM: Version(s): 6.0.0 - 6.0.35, 7.0.0 - 7.0.29 ABSTRACT: A vulnerability was reported in Apache Tomcat. REFERENCE LINKS: Apache Tomcat Red Hat Bugzilla - Bug 883634 SecurityTracker Alert ID: 1027833 CVE-2012-3546 IMPACT ASSESSMENT: High DISCUSSION: When using FORM authentication it was possible to bypass the security constraint checks in the FORM authenticator by appending /j_security_check to the end of the URL if some other component (such as the Single-Sign-On valve) had called request.setUserPrincipal() before the call to

451

New age constraints on the Middle Stone Age occupations of Kharga Oasis, Western Desert, Egypt  

E-Print Network [OSTI]

New age constraints on the Middle Stone Age occupations of Kharga Oasis, Western Desert, Egypt rocks, or tufas, exposed along the flanks of the Libyan Plateau near Kharga Oasis, Western Desert, Egypt

Asmerom, Yemane

452

Geochemical and rheological constraints on the dynamics of the oceanic upper mantle  

E-Print Network [OSTI]

I provide constraints on mantle convection through observations of the rheology and composition of the oceanic upper mantle. Convection cannot be directly observed, yet is a fundamental part of the plate tectonic cycle. ...

Warren, Jessica Mendelsohn

2007-01-01T23:59:59.000Z

453

CASH FLOW MATCHING PROBLEM WITH CVaR CONSTRAINTS: A CASE STUDY WITH PORTFOLIO SAFEGUARD  

E-Print Network [OSTI]

CASH FLOW MATCHING PROBLEM WITH CVaR CONSTRAINTS: A CASE STUDY WITH PORTFOLIO SAFEGUARD Danjue problem is minimized. We use Portfolio Safeguard (PSG) decision support tool to solve the optimization

Uryasev, Stanislav

454

E-Print Network 3.0 - ambiguity time constraints Sample Search...  

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

ambiguity time constraints Page: << < 1 2 3 4 5 > >> 1 Support for Managing Design-Time Decisions Alexander Egyed, Member, IEEE, and David S. Wile Summary: that CSTs are suitable...

455

Improving support for generic programming in C# with associated types and constraint propagation  

E-Print Network [OSTI]

Generics has recently been adopted to many mainstream object oriented languages, such as C# and Java. As a particular design choice, generics in C# and Java use a sub-typing relation to constraint type parameters. Failing to encapsulate type...

Srinivasa Raghavan, Aravind

2009-05-15T23:59:59.000Z

456

A new constraint-based spatial clustering algorithm based on spatial adjacent relation for GML data  

Science Journals Connector (OSTI)

Spatial data mining (SDM) is the discovery of interesting relationships and characteristics that may exist implicitly in spatial databases. Many methods on spatial clustering have been proposed, but only few of them considered the constraints like road, ...

V. Pattabiraman; R. Nedunchezhian

2012-01-01T23:59:59.000Z

457

Impact of unit commitment constraints on generation expansion planning with renewables  

E-Print Network [OSTI]

Growing use of renewables pushes thermal generators against operating constraints - e.g. ramping, minimum output, and operating reserves - that are traditionally ignored in expansion planning models. We show how including ...

Palmintier, Bryan Stephen

458

Constraint damping for the Z4c formulation of general relativity  

Science Journals Connector (OSTI)

One possibility for avoiding constraint violation in numerical relativity simulations adopting free-evolution schemes is to modify the continuum evolution equations so that constraint violations are damped away. Gundlach et al. demonstrated that such a scheme damps low-amplitude, high-frequency constraint-violating modes exponentially for the Z4 formulation of general relativity. Here we analyze the effect of the damping scheme in numerical applications on a conformal decomposition of Z4. After reproducing the theoretically predicted damping rates of constraint violations in the linear regime, we explore numerical solutions not covered by the theoretical analysis. In particular we examine the effect of the damping scheme on low-frequency and on high-amplitude perturbations of flat spacetime as well and on the long-term dynamics of puncture and compact star initial data in the context of spherical symmetry. We find that the damping scheme is effective provided that the constraint violation is resolved on the numerical grid. On grid noise the combination of artificial dissipation and damping helps to suppress constraint violations. We find that care must be taken in choosing the damping parameter in simulations of puncture black holes. Otherwise the damping scheme can cause undesirable growth of the constraints, and even qualitatively incorrect evolutions. In the numerical evolution of a compact static star we find that the choice of the damping parameter is even more delicate, but may lead to a small decrease of constraint violation. For a large range of values it results in unphysical behavior.

Andreas Weyhausen; Sebastiano Bernuzzi; David Hilditch

2012-01-24T23:59:59.000Z

459

Effects of time constraint and percent defective on visual inspection performance  

E-Print Network [OSTI]

EFFECTS OF TIME CONSTRAINT AND PERCENT DEFECTIVE ON VISUAL INSPECTION PERFORMANCE A Thesis by WALTER EDGAR GILMORE II Submitted to the Graduate College of Texas ABM University in partial fulfillment of the requirement for the degree MASTER... OF SCIENCE August 1982 Major Subject: Industrial Engineering EFFECTS OF TIME CONSTRAINT AND PERCENT DEFECTIVE ON VISUAL INSPECTION PERFORMANCE A Thesis by WALTER EDGAR GILMORE II Approved as to sty1e and content by: Chairman of Committ e) (Memb r...

Gilmore, Walter Edgar

2012-06-07T23:59:59.000Z

460

A Chiral Schwinger model, its Constraint Structure and Applications to its Quantization  

E-Print Network [OSTI]

The Jackiw-Rajaraman version of the chiral Schwinger model is studied as a function of the renormalization parameter. The constraints are obtained and they are used to carry out canonical quantization of the model by means of Dirac brackets. By introducing an additional scalar field, it is shown that the model can be made gauge invariant. The gauge invariant model is quantized by establishing a pair of gauge fixing constraints in order that the method of Dirac can be used.

Paul Bracken

2007-10-12T23:59:59.000Z

Note: This page contains sample records for the topic "marketplace constraints limit" from the National Library of EnergyBeta (NLEBeta).
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461

Fortune New Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Fortune New Energy Limited Fortune New Energy Limited Jump to: navigation, search Name Fortune New Energy Limited Place Tianjin, Tianjin Municipality, China Sector Wind energy Product Tianjin-based wind project developer Coordinates 39.231831°, 117.878502° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":39.231831,"lon":117.878502,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

462

EPR Ely Power Limited | Open Energy Information  

Open Energy Info (EERE)

EPR Ely Power Limited EPR Ely Power Limited Jump to: navigation, search Name EPR Ely Power Limited Place London, Greater London, United Kingdom Zip SW1Y 5AU Sector Biomass Product Owns and operates the Ely biomass power plant. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

463

Akhter Solar Limited | Open Energy Information  

Open Energy Info (EERE)

Akhter Solar Limited Akhter Solar Limited Jump to: navigation, search Name Akhter Solar Limited Place Islamabad, Pakistan Product Owns a 3MW module assembly line in Pakistan, which uses Q-Cells cells. Coordinates 33.709839°, 73.075912° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.709839,"lon":73.075912,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

464

Central Electronics Limited CEL | Open Energy Information  

Open Energy Info (EERE)

Electronics Limited CEL Electronics Limited CEL Jump to: navigation, search Name Central Electronics Limited (CEL) Place Sahibabad, Uttar Pradesh, India Zip 201010 Sector Solar Product String representation "Sahibabad-based ... nment of India." is too long. Coordinates 28.67127°, 77.371002° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":28.67127,"lon":77.371002,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

465

Acquasol Infrastructure Limited | Open Energy Information  

Open Energy Info (EERE)

Acquasol Infrastructure Limited Acquasol Infrastructure Limited Jump to: navigation, search Name Acquasol Infrastructure Limited Place Adelaide, South Australia, Australia Zip 5000 Sector Solar Product Adelaide based solar thermal project and technology developer. Coordinates -34.926102°, 138.599884° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":-34.926102,"lon":138.599884,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

466

Biodiesel Energy Trading Limited | Open Energy Information  

Open Energy Info (EERE)

Limited Limited Jump to: navigation, search Name Biodiesel Energy Trading Limited Place London, United Kingdom Zip W1J 8DY Product London-based company focused on trading of biodiesel. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

467

Vihaan Networks Limited VNL | Open Energy Information  

Open Energy Info (EERE)

Vihaan Networks Limited VNL Vihaan Networks Limited VNL Jump to: navigation, search Name Vihaan Networks Limited (VNL) Place Gurgaon, Haryana, India Zip 122015 Sector Solar Product Developer of solar-powered GSM system for rural areas in India. Coordinates 28.55114°, 78.89427° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":28.55114,"lon":78.89427,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

468

Amperex Technology Limited ATL | Open Energy Information  

Open Energy Info (EERE)

Amperex Technology Limited ATL Amperex Technology Limited ATL Jump to: navigation, search Name Amperex Technology Limited (ATL) Place N.T., Hong Kong Product Designer and manufacturer of Lithium Ion Polymer (LIP) battery cells and batteries for OEM customers making cell phones, PDA, notebook PC, earphone, and smart card applications. Coordinates 44.994023°, -72.407693° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":44.994023,"lon":-72.407693,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

469

Armaec Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Armaec Energy Limited Armaec Energy Limited Jump to: navigation, search Name Armaec Energy Limited Place Uxbridge, Greater London, United Kingdom Zip UB10 9NA Sector Wind energy Product London based wind farm developer with a focus on emerging markets such as Armenia, South Africa and India. Coordinates 42.060711°, -71.622467° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.060711,"lon":-71.622467,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

470

Symphony Energy Resources Limited | Open Energy Information  

Open Energy Info (EERE)

Symphony Energy Resources Limited Symphony Energy Resources Limited Jump to: navigation, search Name Symphony Energy Resources Limited Place Borehamwood, United Kingdom Zip WD6 1LE Product String representation "Symphony Energy ... dable plastics." is too long. Coordinates 51.65582°, -0.275754° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.65582,"lon":-0.275754,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

471

Mistral Invest Limited | Open Energy Information  

Open Energy Info (EERE)

Mistral Invest Limited Mistral Invest Limited Jump to: navigation, search Name Mistral Invest Limited Place London, United Kingdom Zip W1U 7DW Sector Wind energy Product Private Equity Fund aiming to build a portfolio of wind farms in the UK and France, participating early in the project development phase. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

472

Eclectic Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Eclectic Energy Limited Eclectic Energy Limited Jump to: navigation, search Name Eclectic Energy Limited Place Nottinghamshire, United Kingdom Zip NG21 9PR Sector Wind energy Product Design, manufacture D400, StealthGen micro wind, DuoGen wind and water generators. Coordinates 53.145962°, -1.00554° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":53.145962,"lon":-1.00554,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

473

Transmission Capital Limited | Open Energy Information  

Open Energy Info (EERE)

Capital Limited Capital Limited Jump to: navigation, search Name Transmission Capital Limited Place London, United Kingdom Zip EC2V 7HR Sector Renewable Energy, Services Product String representation "Provides adviso ... y arrangements." is too long. Coordinates 51.506325°, -0.127144° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.506325,"lon":-0.127144,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

474

Trina Solar Limited | Open Energy Information  

Open Energy Info (EERE)

Trina Solar Limited Trina Solar Limited Jump to: navigation, search Name Trina Solar Limited Place Changzhou, Jiangsu Province, China Zip 213031 Sector Solar Product An integrated solar ingot, wafer, solar cell, module and system manufacturer. Coordinates 31.766211°, 119.94722° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":31.766211,"lon":119.94722,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

475

Extremal limits and black hole entropy  

E-Print Network [OSTI]

Taking the extremal limit of a non-extremal Reissner-Nordstr\\"om black hole (by externally varying the mass or charge), the region between the inner and outer event horizons experiences an interesting fate -- while this region is absent in the extremal case, it does not disappear in the extremal limit but rather approaches a patch of $AdS_2\\times S^2$. In other words, the approach to extremality is not continuous, as the non-extremal Reissner-Nordstr\\"om solution splits into two spacetimes at extremality: an extremal black hole and a disconnected $AdS$ space. We suggest that the unusual nature of this limit may help in understanding the entropy of extremal black holes.

Sean M. Carroll; Matthew C. Johnson; Lisa Randall

2009-01-08T23:59:59.000Z

476

Detonation limits in rough walled tubes  

Science Journals Connector (OSTI)

Abstract The present paper reports the results of a study of detonation limits in rough tubes. Detonation velocity is measured by photodiodes and ionization probes spaced at 10 cm intervals along the length of the tube. Short lengths of smoked foils inserted into the core of the rough tube is used to register the structure of the detonation wave. Pressure transducers are also used to obtain the pressure profile. The results indicate that in rough tubes, the detonation velocity is generally much lower than the corresponding values for smooth tubes. The velocity decreases slowly at first and then more rapidly as the limit is approached. The velocity variation is generally continuous and at the limits, the failure velocity is of the order of about 0.4 V CJ for all cases. The detonation limits in rough tubes are found to be wider than for a smooth tube. This indicates that the turbulence generated by the wall roughness facilitates the propagation of the detonation and extends the limits. Smoked foil records show that in the core of the rough tube the detonation front has a cellular structure corresponding to the usual cellular structure due to instability of the detonation. Thus the intrinsic unstable cellular structure is quite robust and retains its global characteristics in spite of the large perturbations generated by the rough wall. The detonation in the core of the rough tube goes from multi-headed to single headed as the limit is approached. Past the single headed spin, the low velocity detonation has no cellular structure but consists of interacting weak transverse waves from the rough wall. The averaged pressure of the low velocity detonation front corresponds to about the constant volume explosion pressure, in accord with the velocity of the low velocity detonation.

Amanda Starr; John H.S. Lee; Hoi Dick Ng

2014-01-01T23:59:59.000Z

477

ON COMPUTING UPPER LIMITS TO SOURCE INTENSITIES  

SciTech Connect (OSTI)

A common problem in astrophysics is determining how bright a source could be and still not be detected in an observation. Despite the simplicity with which the problem can be stated, the solution involves complicated statistical issues that require careful analysis. In contrast to the more familiar confidence bound, this concept has never been formally analyzed, leading to a great variety of often ad hoc solutions. Here we formulate and describe the problem in a self-consistent manner. Detection significance is usually defined by the acceptable proportion of false positives (background fluctuations that are claimed as detections, or Type I error), and we invoke the complementary concept of false negatives (real sources that go undetected, or Type II error), based on the statistical power of a test, to compute an upper limit to the detectable source intensity. To determine the minimum intensity that a source must have for it to be detected, we first define a detection threshold and then compute the probabilities of detecting sources of various intensities at the given threshold. The intensity that corresponds to the specified Type II error probability defines that minimum intensity and is identified as the upper limit. Thus, an upper limit is a characteristic of the detection procedure rather than the strength of any particular source. It should not be confused with confidence intervals or other estimates of source intensity. This is particularly important given the large number of catalogs that are being generated from increasingly sensitive surveys. We discuss, with examples, the differences between these upper limits and confidence bounds. Both measures are useful quantities that should be reported in order to extract the most science from catalogs, though they answer different statistical questions: an upper bound describes an inference range on the source intensity, while an upper limit calibrates the detection process. We provide a recipe for computing upper limits that applies to all detection algorithms.

Kashyap, Vinay L.; Siemiginowska, Aneta [Smithsonian Astrophysical Observatory, 60 Garden Street, Cambridge, MA 02138 (United States); Van Dyk, David A.; Xu Jin [Department of Statistics, University of California, Irvine, CA 92697-1250 (United States); Connors, Alanna [Eureka Scientific, 2452 Delmer Street, Suite 100, Oakland, CA 94602-3017 (United States); Freeman, Peter E. [Department of Statistics, Carnegie Mellon University, 5000 Forbes Avenue, Pittsburgh, PA 15213 (United States); Zezas, Andreas, E-mail: vkashyap@cfa.harvard.ed, E-mail: asiemiginowska@cfa.harvard.ed, E-mail: dvd@ics.uci.ed, E-mail: jinx@ics.uci.ed, E-mail: aconnors@eurekabayes.co, E-mail: pfreeman@cmu.ed, E-mail: azezas@cfa.harvard.ed [Physics Department, University of Crete, P.O. Box 2208, GR-710 03, Heraklion, Crete (Greece)

2010-08-10T23:59:59.000Z

478

The HST/ACS+WFC3 Survey for Lyman Limit Systems II: Science  

E-Print Network [OSTI]

We present the first science results from our Hubble Space Telescope Survey for Lyman limit absorption systems (LLS) using the low dispersion spectroscopic modes of the Advanced Camera for Surveys and the Wide Field Camera 3. Through an analysis of 71 quasars, we determine the incidence frequency of LLS per unit redshift and per unit path length, l(z) and l(x) respectively, over the redshift range 1 stacked spectrum analysis, we determine a median (mean) value of the mean free path to ionizing radiation at z=2.4 of lambda_mfp = 243(252)h^(-1) Mpc, with an error on the mean value of +/- 43h^(-1) Mpc. We also re-evaluate the estimates of lambda_mfp from Prochaska et al. (2009) and place constraints on the evolution of lambda_mfp with redshift, including an estimate of the "breakthrough" redshift of z = 1.6. Consistent with results at higher z, we...

O'Meara, John M; Worseck, Gabor; Chen, Hsiao-Wen; Madau, Piero

2012-01-01T23:59:59.000Z

479

High redshift AGNs and HI reionisation: limits from the unresolved X-ray background  

E-Print Network [OSTI]

The rapidly declining population of bright quasars at z~3 appears to make an increasingly small contribution to the ionising background at the HI Lyman limit. It is then generally though that massive stars in (pre-)galactic systems may provide the additional ionising flux needed to complete HI reionisation by z>6. A galaxy dominated background, however, may require that the escape fraction of Lyman continuum radiation from high redshift galaxies is as high as 10%, a value somewhat at odds with (admittedly scarce) observational constraints. High escape fractions from dwarf galaxies have been advocated, or, alternatively, a so-far undetected (or barely detected) population of unobscured, high-redshift faint AGNs. Here we question the latter hypothesis, and show that such sources, to be consistent with the measured level of the unresolved X-ray background at z=0, can provide a fraction of the HII filling factor not larger than 13% by z=6. The fraction rises to 10%.

Haardt, Francesco

2015-01-01T23:59:59.000Z

480

Core Overshoot: An Improved Treatment and Constraints from Seismic Data  

E-Print Network [OSTI]

We present a comprehensive set of stellar evolution models for Procyon A in an effort to guide future measurements of both traditional stellar parameters and seismic frequencies towards constraining the amount of core overshoot in Procyon A and possibly other stars. Current observational measurements of Procyon A when combined with traditional stellar modeling only place a large upper limit on overshoot of alphaOV < 1.1. By carrying out a detailed pulsation analysis, we further demonstrate, how p- and g-mode averaged spacings can be used to gain better estimates of the core size. For both p- and g-modes, the frequency spacings for models without overshoot are clearly separated from the models with overshoot. In addition, measurements of the l=0 averaged small p-mode spacings could be used to establish Procyon A's evolutionary stage. For a fixed implementation of overshoot and under favorable circumstances, the g-mode spacings can be used to determine the overshoot extent to an accuracy of +-0.05 Hp. However, we stress that considerable confusion is added due to the unknown treatment of the overshoot region. This ambiguity might be removed by analyzing many different stars. A simple non-local convection theory developed by Kuhfuss is implemented in our stellar evolution code and contrasted with the traditional approaches. We show that this theory supports a moderate increase of the amount of convective overshoot with stellar mass of Delta(alphaOV) = +0.10 between 1.5 Msun and 15 Msun. This theory places an upper limit on Procyon A's core overshoot extent of ~0.4 Hp which matches the limit imposed by Roxburgh's integral criterion.

Christian W. Straka; Pierre Demarque; D. B. Guenther

2005-05-01T23:59:59.000Z

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481

Testable constraint on near-tribimaximal neutrino mixing  

E-Print Network [OSTI]

General lowest order perturbations to hermitian squared mass matrices of leptons are considered away from the tribimaximal (TBM) limit in which a weak flavor basis with mass diagonal charged leptons is chosen. The three measurable TBM-deviants are expressed linearly in terms of perturbation induced dimensionless coefficients appearing in the charged lepton and neutrino flavor eigenstates. With unnatural cancellations assumed to be absent and the charged lepton perturbation contributions to their flavor eigenstates argued to be small, we analytically derive that a deviation from maximal atmospheric neutrino mixing and CP violation in neutrino oscillations cannot both be observably large, posing the challenge of verification to forthcoming experiments at the intensity frontier.

Brahmachari, Biswajoy

2014-01-01T23:59:59.000Z

482

Testable constraint on near-tribimaximal neutrino mixing  

E-Print Network [OSTI]

General lowest order perturbations to hermitian squared mass matrices of leptons are considered away from the tribimaximal (TBM) limit in which a weak flavor basis with mass diagonal charged leptons is chosen. The three measurable TBM-deviants are expressed linearly in terms of perturbation induced dimensionless coefficients appearing in the charged lepton and neutrino flavor eigenstates. With unnatural cancellations assumed to be absent and the charged lepton perturbation contributions to their flavor eigenstates argued to be small, we analytically derive that a deviation from maximal atmospheric neutrino mixing and CP violation in neutrino oscillations cannot both be observably large, posing the challenge of verification to forthcoming experiments at the intensity frontier.

Biswajoy Brahmachari; Probir Roy

2014-07-20T23:59:59.000Z

483

Constraints on Top Couplings in Models with Exotic Quarks  

Science Journals Connector (OSTI)

The extension of the standard model with exotic quark singlets and doublets introduces large flavor changing neutral couplings between ordinary fermions. We derive inequalities which translate the precise determination of the diagonal Z couplings, in particular, at LEP, into stringent bounds on the off-diagonal ones. The resulting limits can be saturated in minimal extensions with one vector doublet or singlet. In this case, 23 and 6 single top events, respectively, are predicted at LEP2 for an integrated luminosity of 500 pb-1 per experiment.

F. del Aguila; J. A. Aguilar-Saavedra; R. Miquel

1999-02-22T23:59:59.000Z

484

CONSTRAINTS ON NEUTRON STAR MASS AND RADIUS IN GS 1826-24 FROM SUB-EDDINGTON X-RAY BURSTS  

SciTech Connect (OSTI)

We investigate the constraints on neutron star mass and radius in GS 1826-24 from models of light curves and spectral evolution of type I X-ray bursts. This source shows remarkable agreement with theoretical calculations of burst energies, recurrence times, and light curves. We first exploit this agreement to set the overall luminosity scale of the observed bursts. When combined with a measured blackbody normalization, this leads to a distance- and anisotropy-independent measurement of the ratio between the redshift 1 + z and color-correction factor f{sub c}. We find 1 + z = 1.19-1.28 for f{sub c} = 1.4-1.5. We then compare the evolution of the blackbody normalization with flux in the cooling tail of bursts with predictions from spectral models of Suleimanov et al. The observations are well described by the models at luminosities greater than about one-third of the peak luminosity, with deviations emerging at luminosities below that. We show that this comparison leads to distance-independent upper limits on R{sub {infinity}} and neutron star mass of R{sub {infinity}} {approx}< 9.0-13.2 km and M < 1.2-1.7 M{sub Sun }, respectively, for solar abundance of hydrogen at the photosphere and a range of metallicity and surface gravity. The radius limits are low in comparison to previous measurements. This may be indicative of a subsolar hydrogen fraction in the GS 1826-24 photosphere, or of larger color corrections than that predicted by spectral models. Our analysis also gives an upper limit on the distance to GS 1826-24 of d < 4.0-5.5 kpc {xi}{sup -1/2}{sub b}, where {xi}{sub b} is the degree of anisotropy of the burst emission.

Zamfir, Michael; Cumming, Andrew [Department of Physics, McGill University, 3600 rue University, Montreal, QC H3A 2T8 (Canada); Galloway, Duncan K., E-mail: mzamfir@physics.mcgill.ca, E-mail: cumming@physics.mcgill.ca, E-mail: Duncan.Galloway@monash.edu [Monash Centre for Astrophysics (MoCA), School of Physics, and School of Mathematical Sciences, Monash University, VIC 3800 (Australia)

2012-04-10T23:59:59.000Z

485

Criticality Safety Controls for 55-Gallon Drums with a Mass Limit of 200 grams Pu-239  

SciTech Connect (OSTI)

The following 200-gram Pu drum criticality safety controls are applicable to RHWM drum storage operations: (1) Mass (Fissile/Pu) - each 55-gallon drum or its equivalent shall be limited to 200 gram Pu or Pu equivalent; (2) Moderation - Hydrogen materials with a hydrogen density greater than that (0.133 g H/cc) of polyethylene and paraffin are not allowed and hydrogen materials with a hydrogen density no greater than that of polyethylene and paraffin are allowed with unlimited amounts; (3) Interaction - a spacing of 30-inches (76 cm) is required between arrays and 200-gram Pu drums shall be placed in arrays for 200-gram Pu drums only (no mingling of 200-gram Pu drums with other drums not meeting the drum controls associated with the 200-gram limit); (4) Reflection - no beryllium and carbon/graphite (other than the 50-gram waiver amount) is allowed, (note that Nat-U exceeding the waiver amount is allowed when its U-235 content is included in the fissile mass limit of 200 grams); and (5) Geometry - drum geometry, only 55-gallon drum or its equivalent shall be used and array geometry, 55-gallon drums are allowed for 2-high stacking. Steel waste boxes may be stacked 3-high if constraint.

Chou, P

2011-12-14T23:59:59.000Z

486

Environment--an elastic limit to growth  

Science Journals Connector (OSTI)

...could cope effectively with energy use and transportation problems...present special problems. Our energy and transport problems could...the LDCs are drawn within the ambit of industrial society, but...into the exploitable range. Energy need not be a limit if tech...

S Brubaker

1972-01-01T23:59:59.000Z

487

Quantum dynamics in the thermodynamic limit  

SciTech Connect (OSTI)

The description of spontaneous symmetry breaking that underlies the connection between classically ordered objects in the thermodynamic limit and their individual quantum-mechanical building blocks is one of the cornerstones of modern condensed-matter theory and has found applications in many different areas of physics. The theory of spontaneous symmetry breaking, however, is inherently an equilibrium theory, which does not address the dynamics of quantum systems in the thermodynamic limit. Here, we will use the example of a particular antiferromagnetic model system to show that the presence of a so-called thin spectrum of collective excitations with vanishing energy - one of the well-known characteristic properties shared by all symmetry-breaking objects - can allow these objects to also spontaneously break time-translation symmetry in the thermodynamic limit. As a result, that limit is found to be able, not only to reduce quantum-mechanical equilibrium averages to their classical counterparts, but also to turn individual-state quantum dynamics into classical physics. In the process, we find that the dynamical description of spontaneous symmetry breaking can also be used to shed some light on the possible origins of Born's rule. We conclude by describing an experiment on a condensate of exciton polaritons which could potentially be used to experimentally test the proposed mechanism.

Wezel, Jasper van [Theory of Condensed Matter, Cavendish Laboratory, University of Cambridge, Madingley Road, Cambridge CB3 0HE (United Kingdom)

2008-08-01T23:59:59.000Z

488

DISSOLVED CONCENTRATION LIMITS OF RADIOACTIVE ELEMENTS  

SciTech Connect (OSTI)

The purpose of this study is to evaluate dissolved concentration limits (also referred to as solubility limits) of elements with radioactive isotopes under probable repository conditions, based on geochemical modeling calculations using geochemical modeling tools, thermodynamic databases, field measurements, and laboratory experiments. The scope of this modeling activity is to predict dissolved concentrations or solubility limits for 14 elements with radioactive isotopes (actinium, americium, carbon, cesium, iodine, lead, neptunium, plutonium, protactinium, radium, strontium, technetium, thorium, and uranium) important to calculated dose. Model outputs for uranium, plutonium, neptunium, thorium, americium, and protactinium are in the form of tabulated functions with pH and log (line integral) CO{sub 2} as independent variables, plus one or more uncertainty terms. The solubility limits for the remaining elements are either in the form of distributions or single values. The output data from this report are fundamental inputs for Total System Performance Assessment for the License Application (TSPA-LA) to determine the estimated release of these elements from waste packages and the engineered barrier system. Consistent modeling approaches and environmental conditions were used to develop solubility models for all of the actinides. These models cover broad ranges of environmental conditions so that they are applicable to both waste packages and the invert. Uncertainties from thermodynamic data, water chemistry, temperature variation, and activity coefficients have been quantified or otherwise addressed.

NA

2004-11-22T23:59:59.000Z

489

States' authority to veto offshore leasing limited  

Science Journals Connector (OSTI)

States' authority to veto offshore leasing limited ... In a controversial, 5-to-4 decision, the U.S. Supreme Court has ruled that coastal states do not have the authority to veto most of the leases granted by the federal government for offshore drilling and oil and natural gas explorations. ...

1984-01-23T23:59:59.000Z

490

Incremental integrity checking: limitations and possibilities  

E-Print Network [OSTI]

the problem to query containment, we show that no procedure exists that always returns the best incremental measuring the checking effort. In spite of this theoretical limitation, we develop an effective procedure and also applies to recursive databases. Finally, we point out the improvements with respect to previous

Martinenghi, Davide

491

EU Verbraucherrechte Apple One-Year Limited  

E-Print Network [OSTI]

EU Verbraucherrechte Apple One-Year Limited Warranty AppleCare Protection Plan CC Service Pack, Kabel. Zusätzlich bei allen Macs: 1x Time Capsule oder 1x Airport Gerät sowie 1x Apple Display Macs u sowie 1x Apple Display Material- u. Herstellungsfehler. Keine Leistung für Verschlei�teile wie Akku

Fiebig, Peter

492

TRADEOFFS AND LIMITATIONS IN STATISTICALLY BASED IMAGE  

E-Print Network [OSTI]

Tomography (Compton SPECT) system is derived, and reconstructed images from both simulated and measured data of the projection data using vector quantizers. Asymptotic expressions for the loss in the KullbackTRADEOFFS AND LIMITATIONS IN STATISTICALLY BASED IMAGE RECONSTRUCTION PROBLEMS by Thomas J. Kragh

Hero, Alfred O.

493

Combined Tevatron upper limit on gg --> H --> W[superscript +]W[superscript -] and constraints on the Higgs boson mass in fourth-generation fermion models  

E-Print Network [OSTI]

We combine results from searches by the CDF and D0 collaborations for a standard model Higgs boson (H) in the process gg-->H-->W+W- in pp? collisions at the Fermilab Tevatron Collider at [sqrt]s=1.96??TeV. With 4.8??fb-1 ...

Paus, Christoph M. E.

494

Optimal constraints on local primordial non-Gaussianity from the two-point statistics of large-scale structure  

SciTech Connect (OSTI)

One of the main signatures of primordial non-Gaussianity of the local type is a scale-dependent correction to the bias of large-scale structure tracers such as galaxies or clusters, whose amplitude depends on the bias of the tracers itself. The dominant source of noise in the power spectrum of the tracers is caused by sampling variance on large scales (where the non-Gaussian signal is strongest) and shot noise arising from their discrete nature. Recent work has argued that one can avoid sampling variance by comparing multiple tracers of different bias, and suppress shot noise by optimally weighting halos of different mass. Here we combine these ideas and investigate how well the signatures of non-Gaussian fluctuations in the primordial potential can be extracted from the two-point correlations of halos and dark matter. On the basis of large N-body simulations with local non-Gaussian initial conditions and their halo catalogs we perform a Fisher matrix analysis of the two-point statistics. Compared to the standard analysis, optimal weighting and multiple-tracer techniques applied to halos can yield up to 1 order of magnitude improvements in f{sub NL}-constraints, even if the underlying dark matter density field is not known. In this case one needs to resolve all halos down to 10{sup 10}h{sup -1}M{sub sun} at z=0, while with the dark matter this is already achieved at a mass threshold of 10{sup 12}h{sup -1}M{sub sun}. We compare our numerical results to the halo model and find satisfactory agreement. Forecasting the optimal f{sub NL}-constraints that can be achieved with our methods when applied to existing and future survey data, we find that a survey of 50h{sup -3} Gpc{sup 3} volume resolving all halos down to 10{sup 11}h{sup -1}M{sub sun} at z=1 will be able to obtain {sigma}{sub f{sub N{sub L}}}{approx}1 (68% cl), a factor of {approx}20 improvement over the current limits. Decreasing the minimum mass of resolved halos, increasing the survey volume or obtaining the dark matter maps can further improve these limits, potentially reaching the level of {sigma}{sub f{sub N{sub L}}}{approx}0.1. This precision opens up the possibility to distinguish different types of primordial non-Gaussianity and to probe inflationary physics of the very early Universe.

Hamaus, Nico; Desjacques, Vincent [Institute for Theoretical Physics, University of Zurich, 8057 Zurich (Switzerland); Seljak, Uros [Institute for Theoretical Physics, University of Zurich, 8057 Zurich (Switzerland); Physics Department, Astronomy Department and Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States); Ewha University, Seoul 120-750, S. Korea (Korea, Republic of)

2011-10-15T23:59:59.000Z

495

Constraints on dark matter annihilation from AMS-02 results  

Science Journals Connector (OSTI)

We use recently released data on the positron-to-electron ratio in cosmic rays from the AMS-02 experiment to constrain dark matter annihilation in the Milky Way. Due to the yet unexplained positron excess, limits are generally weaker than those obtained using other probes, especially gamma rays. This also means that explaining the positron excess in terms of dark matter annihilation is difficult. Only if very conservative assumptions on the dark matter distribution in the Galactic center region are adopted, it may be possible to accommodate dark matter annihilating to leptons with a cross section above 10-24??cm3/sec?. We comment on several theoretical mechanisms to explain such large annihilation cross sections.

Joachim Kopp

2013-10-24T23:59:59.000Z

496

Tidal Energy Limited | Open Energy Information  

Open Energy Info (EERE)

Tidal Energy Limited (TEL) Tidal Energy Limited (TEL) Place Cardiff, Wales, United Kingdom Zip CF23 8RS Product Tidal stream device developer. Coordinates 51.48125°, -3.180734° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":51.48125,"lon":-3.180734,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

497

Information-Theoretic Limits of Control  

Science Journals Connector (OSTI)

Fundamental limits on the controllability of physical systems are discussed in the light of information theory. It is shown that the second law of thermodynamics, when generalized to include information, sets absolute limits to the minimum amount of dissipation required by open-loop control. In addition, an information-theoretic analysis of control systems shows feedback control to be a zero sum game: each bit of information gathered from a dynamical system by a control device can serve to decrease the entropy of that system by at most one bit additional to the reduction of entropy attainable without such information. Consequences for the control of discrete state systems and chaotic maps are discussed.

Hugo Touchette and Seth Lloyd

2000-02-07T23:59:59.000Z

498

Superconducting Fault Current Limiter for Transmission Voltage  

Science Journals Connector (OSTI)

Within a collaboration of American Superconductor, Siemens, Nexans and Southern California Edison one electrical phase of a resistive superconducting fault current limiter for the 115 kV transmission voltage level has been designed and manufactured. The active part of the limiter consists of 63 bifilar coils made of 12 mm wide steel-stabilized YBCO conductor and is housed in a cryostat operated at 5 bar and 74 K. The first phase was completely assembled and successfully subjected to power switching tests and high voltage tests. The basic design of the system and the test results are reported. The work was funded in part by US-DOE under Contract Number DE-FC26-07NT43243.

Hans-Peter Kraemer; Wolfgang Schmidt; Hong Cai; Bruce Gamble; David Madura; Tim MacDonald; Joe McNamara; Walther Romanosky; Greg Snitchler; Nicolas Lallouet; Frank Schmidt; Syed Ahmed

2012-01-01T23:59:59.000Z

499

12 Voltz Limited | Open Energy Information  

Open Energy Info (EERE)

Voltz Limited Voltz Limited Jump to: navigation, search Name 12 Voltz Limited Place Cumbria, United Kingdom Zip LA8 9NH Sector Renewable Energy, Solar, Wind energy Product Selling and delivering broad range of advanced energy generating systems and accessories including wind turbines, solar panels, batteries,regulators,and stables, and as well as developing renewable energy technology and related products. Coordinates 54.63044°, -2.89984° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":54.63044,"lon":-2.89984,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

500

Energy Systems Limited ESL | Open Energy Information  

Open Energy Info (EERE)

Limited ESL Limited ESL Jump to: navigation, search Name Energy Systems Limited- ESL Place Kampala, Uganda Zip 25928 Sector Renewable Energy, Solar Product ESL deals with design, supply, installations and maintenance of solar and other renewable energy systems in Uganda. The company has a special focus on the remote rural communitiies within Uganda. Coordinates 0.3228°, 32.574841° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":0.3228,"lon":32.574841,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}