Sample records for windy gap firming

  1. EIS-0370: Windy Gap Firming Project, Colorado | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of98-F,-SA-01:5-SA-01:Draftoftoto Conduct PublicFinalFinal0: Windy

  2. Vertical Farrning in the Windy City

    E-Print Network [OSTI]

    Saniie, Jafar

    vegetable and fish waste into fertilizer and biogas to power a heating, cooling, and 280-kilowatt electricalIIScience News Vertical Farrning in the Windy City In Chicago's meatpacking district, developer

  3. The Windy Prize-Collecting Rural Postman Problem:

    E-Print Network [OSTI]

    2014-04-14T23:59:59.000Z

    studied windy ARPs with a single vehicle as particular cases is given by Cor- berán et al ...... In: Varela F, Bourgine P (eds) Toward a Practice of Autonomous.

  4. EA-1610: Windy Hollow Wind Project, Laramie County, Wyoming

    Broader source: Energy.gov [DOE]

    This EA will evaluate the environmental impacts of a proponent request to interconnect their proposed Windy Hollow Wind Project in Laramie County, Wyoming, to DOE’s Western Area Power Administration’s transmission system.

  5. Windy City Renewable Energy LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTown ofNationwideWTEDBird,Wilsonville, Oregon:WindPoleWisconsin: EnergyWindy City

  6. Big Windy (Great Escape Restaurant Turbine) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: EnergyAvignon,Belcher Homes JumpMaintenance |BigBig Windy (Great

  7. Record of Decision for the Electrical Interconnection of the Windy Point Wind Energy Project.

    SciTech Connect (OSTI)

    United States. Bonneville Power Administration.

    2006-11-01T23:59:59.000Z

    The Bonneville Power Administration (BPA) has decided to offer contract terms for interconnection of 250 megawatts (MW) of power to be generated by the proposed Windy Point Wind Energy Project (Wind Project) into the Federal Columbia River Transmission System (FCRTS). Windy Point Partners, LLC (WPP) propose to construct and operate the proposed Wind Project and has requested interconnection to the FCRTS. The Wind Project will be interconnected at BPA's Rock Creek Substation, which is under construction in Klickitat County, Washington. The Rock Creek Substation will provide transmission access for the Wind Project to BPA's Wautoma-John Day No.1 500-kilovolt (kV) transmission line. BPA's decision to offer terms to interconnect the Wind Project is consistent with BPA's Business Plan Final Environmental Impact Statement (BP EIS) (DOE/EIS-0183, June 1995), and the Business Plan Record of Decision (BP ROD, August 15, 1995). This decision thus is tiered to the BP ROD.

  8. %% file: linux-brief-manual.txt = unix basics for micro$oft windies %% last: Jan 13 2012

    E-Print Network [OSTI]

    Rutten, Rob

    students ("windie dotties"): http://www.staff.science.uu.nl/~rutte101/Students_to_the_DOT_program.html I also have Ubuntu installation recipes at http://www.staff.science.uu.nl/~rutte101/Installing_Ubuntu.html and some unix/linux recipes at http://www.staff.science.uu.nl/~rutte101/Assorted_linux.html See also: http

  9. A wind turbine blade is ready to be lifted into place at the Windy Point Wind Farm in the Columbia River Gorge. Photo: C. Bruce Forster

    E-Print Network [OSTI]

    A wind turbine blade is ready to be lifted into place at the Windy Point Wind Farm in the Columbia with juvenile bypass systems to keep the smolts out of the turbines. But given the gravity of the [salmon

  10. EIS-0400: Granby Pumping Plant Switchyard-Windy Gap Substation Transmission Line Rebuild Project, Grand County, CO

    Broader source: Energy.gov [DOE]

    Western Area Power Administration prepared an EIS, with the U.S. Forest Service, Bureau of Land Management, and Grand County (Colorado) as cooperating agencies, to evaluate the potential environmental impacts of rebuilding a 12-mile, 69 kV electric transmission line in Grand County. The proposed project would rebuild the single-circuit line as a double-circuit transmission line and add a second power transformer. Western identified potentially significant impacts while preparing an EA for this proposal (DOE/EA-1520) and prepared an EIS instead of completing the EA. Further information about the project is available on the project website.

  11. Hydrocarbon-bearing fluid inclusions in fluorite associated with the Windy Knoll bitumen deposit, UK

    SciTech Connect (OSTI)

    Moser, M.R. (Imperial College, London (United Kingdom) University College, London (United Kingdom)); Rankin, A.H. (Imperial College, London (United Kingdom)); Milledge, H.J. (University College, London (United Kingdom))

    1992-01-01T23:59:59.000Z

    Hydrocarbon-bearing fluid inclusions in fluorite, associated with an outcropping bitumen deposit at Windy Knoll, Derbyshire, have been analyzed in situ using a combination of microthermometry, Fourier transform infrared (FTIR) microspectrometry, and ultraviolet (UV) microscopy. The inclusions in these samples can be considered as a series with two end members: aqueous inclusions containing a low-density vapor phase and inclusions containing liquid oil' with no detectable aqueous phase. The majority of the inclusions are mixed types containing both aqueous and liquid hydrocarbon phases. Although microthermometry distinguishes at least two different aqueous fluids with varying homogenization temperatures and salinities, the oil fraction is cogenetic and trapped together with just one fluid, a low-salinity, low-calcium brine with an average homogenization temperature of 134C. The majority of the liquid hydrocarbon-bearing inclusions fluoresce bright blue under UV illumination with peaks around 475 nm, characteristic of paraffinic oils. The FTIR spectra of these inclusions are dominated by peaks assigned to aliphatic C-H bonding. However, inclusions have also been found which display a fluorescence typical of the red-shift associated with less mature oils. The FTIR spectra display peaks assigned to C{double bond}O, C-O, and O-CH{sub 2} bonding. This study presents new data on the in-situ analysis of hydrocarbon-bearing fluid inclusion from this important area of natural petroleum seepage and ore mineralization. The results suggest a direct link between the fluid inclusion populations, the outcropping bitumens, and fluorite deposition.

  12. An assessment of the available windy land area and wind energy potential in the contiguous United States

    SciTech Connect (OSTI)

    Elliott, D.L.; Wendell, L.L.; Gower, G.L.

    1991-08-01T23:59:59.000Z

    Estimates of land areas with various levels of wind energy resource and resultant wind energy potential have been developed for each state in the contiguous United States. The estimates are based on published wind resource data and account for the exclusion of some windy lands as a result of environmental and land-use considerations. Despite these exclusions, the amount of wind resource estimated over the contiguous United States is surprisingly large and has the potential to supply a substantial fraction of the nation's energy needs, even with the use of today's wind turbine technology. Although this study shows that, after exclusions, only about 0.6% of the land area in the contiguous United States is characterized by high wind resource (comparable to that found in windy areas of California where wind energy is being cost-effectively developed), the wind electric potential that could be extracted with today's technology from these areas across the United States is equivalent to about 20% of the current US electric consumption. Future advances in wind turbine technology will further enhance the potential of wind energy. As advances in turbine technology allow areas of moderate wind resource to be developed, more than a tenfold increase in the wind energy potential is possible. These areas, which cover large sections of the Great Plains and are widely distributed throughout many other sections of the country, have the potential of producing more than three times the nation's current electric consumption. 9 refs., 12 figs., 13 tabs.

  13. 2010FirmRateAdj

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

    2015 Firm Power Rates & Rate Schedules The Pick-Sloan Missouri Basin Program--Eastern Division: Firm Electric Service Pick Sloan Missouri River -Eastern Division Rates Effective...

  14. Priority Firm Exchange .

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)IntegratedSpeedingTechnical News, informationPriority Firm Exchange . . . . . . . . .

  15. Correlations in firm default behavior

    E-Print Network [OSTI]

    Thirukkonda, Sreeram (Sreeram Radhakrishnan), 1975-

    2009-01-01T23:59:59.000Z

    Modeling credit risk using Structural and Reduced Form models has been a popular and apropos topic of research. This work makes an attempt to better understand correlations in firm default. A review of contemporary research ...

  16. Where do firms manage earnings?

    E-Print Network [OSTI]

    Dyreng, Scott D.

    Despite decades of research on how, why, and when companies manage earnings, there is a paucity of evidence about the geographic location of earnings management within multinational firms. In this study, we examine where ...

  17. Organizational Learning and Internationalization Knowledge: A Comparative Study of Family Firms and Non-Family Firms

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Organizational Learning and Internationalization Knowledge: A Comparative Study of Family Firms with knowledge in family firms by analyzing the role of organizational knowledge in the internationalization, the influence of these variables on internationalization organizational knowledge and finally on firms

  18. IT investments and firm performance across economies

    E-Print Network [OSTI]

    Sahu, Rakesh

    2009-01-01T23:59:59.000Z

    Research has shown a positive relationship between IT investments and firm performance. But the results vary across firms and performance measures. Evidence indicates that IT resource allocations, in the form of investment ...

  19. Closing the Mesoscale Gap

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

    Closing the Mesoscale Gap Los Alamos proposes to fill in the gaps in our fundamental understanding of materials with MaRIE, a facility designed to gain access to the mesoscale....

  20. Windy Flats | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension Jump to:Flats Jump

  1. Externalities of public firm presence: Evidence from private firms' investment decisions

    E-Print Network [OSTI]

    Badertscher, Brad

    Public firms provide a large amount of information through their disclosures. In addition, information intermediaries publicly analyze, discuss, and disseminate these disclosures. Thus, greater public firm presence in an ...

  2. College Gender Gaps

    E-Print Network [OSTI]

    Bronson, Mary Ann

    2013-01-01T23:59:59.000Z

    College Gender Gaps BY MARY ANN BRONSONBY MARY ANN BRONSON FALL 2013 W HY DO WOMEN ATTEND collegerelationship is crucial. Mary Ann Bronson, a Ph.D. candidate

  3. Institutional Investors, Managerial Incentives, and Firms' Risk Profiles

    E-Print Network [OSTI]

    Celil, Hursit S

    2013-04-11T23:59:59.000Z

    (Vega). Instead, I find that institutional investors appear to influence the risk profile of firm through the firm’s investment, financing and diversification policy choices even after I control for the CEO’s compensation structure. The results suggest...

  4. Colorado Firm Develops Innovative Materials for Geothermal Systems...

    Office of Environmental Management (EM)

    Firm Develops Innovative Materials for Geothermal Systems Colorado Firm Develops Innovative Materials for Geothermal Systems April 18, 2013 - 12:00am Addthis With support from...

  5. Empirical essays on firm behavior in India

    E-Print Network [OSTI]

    Ryan, Nicholas (Nicholas James)

    2012-01-01T23:59:59.000Z

    In this thesis, I study the behavior of industrial firms in India in the electricity market and with respect to locational choice and environmental regulation. In the first chapter, I study the competitive effects of ...

  6. Essays on taxation and firm behavior

    E-Print Network [OSTI]

    Rao, Nirupama S

    2010-01-01T23:59:59.000Z

    This dissertation consists of three essays that examine the impact of tax policy of firm behavior. The first chapter uses new well-level production data on California oil wells and after-tax producer prices to estimate how ...

  7. Generation gaps in engineering?

    E-Print Network [OSTI]

    Kim, David J. (David Jinwoo)

    2008-01-01T23:59:59.000Z

    There is much enthusiastic debate on the topic of generation gaps in the workplace today; what the generational differences are, how to address the apparent challenges, and if the generations themselves are even real. ...

  8. Fiber optic gap gauge

    DOE Patents [OSTI]

    Wood, Billy E. (Livermore, CA); Groves, Scott E. (Brentwood, CA); Larsen, Greg J. (Brentwood, CA); Sanchez, Roberto J. (Pleasanton, CA)

    2006-11-14T23:59:59.000Z

    A lightweight, small size, high sensitivity gauge for indirectly measuring displacement or absolute gap width by measuring axial strain in an orthogonal direction to the displacement/gap width. The gap gauge includes a preferably titanium base having a central tension bar with springs connecting opposite ends of the tension bar to a pair of end connector bars, and an elongated bow spring connected to the end connector bars with a middle section bowed away from the base to define a gap. The bow spring is capable of producing an axial strain in the base proportional to a displacement of the middle section in a direction orthogonal to the base. And a strain sensor, such as a Fabry-Perot interferometer strain sensor, is connected to measure the axial strain in the base, so that the displacement of the middle section may be indirectly determined from the measurement of the axial strain in the base.

  9. Essays on Firm Growth and Survival as a Fortune 500 Firm 

    E-Print Network [OSTI]

    Vadakkepatt, Gautham Gopal

    2011-10-21T23:59:59.000Z

    In this dissertation, I develop frameworks and models capturing the effects of marketing capital and R and D capital on firm growth and sustained membership in the Fortune 500 cohort. Drawing on the resource-based view (RBV) of the firm...

  10. Do Private Firms Invest Dierently than Public Firms? Taking Cues from the Natural Gas Industry

    E-Print Network [OSTI]

    Lin, Xiaodong

    Do Private Firms Invest Dierently than Public Firms? Taking Cues from the Natural Gas Industry Erik and public rms using a unique dataset of onshore U.S. natural gas producers. In rm-level regressions we nd that investments by private rms are 68% less responsive to changes in natural gas prices, a measure that captures

  11. Uncertainties in Gapped Graphene

    E-Print Network [OSTI]

    Eylee Jung; Kwang S. Kim; DaeKil Park

    2012-03-20T23:59:59.000Z

    Motivated by graphene-based quantum computer we examine the time-dependence of the position-momentum and position-velocity uncertainties in the monolayer gapped graphene. The effect of the energy gap to the uncertainties is shown to appear via the Compton-like wavelength $\\lambda_c$. The uncertainties in the graphene are mainly contributed by two phenomena, spreading and zitterbewegung. While the former determines the uncertainties in the long-range of time, the latter gives the highly oscillation to the uncertainties in the short-range of time. The uncertainties in the graphene are compared with the corresponding values for the usual free Hamiltonian $\\hat{H}_{free} = (p_1^2 + p_2^2) / 2 M$. It is shown that the uncertainties can be under control within the quantum mechanical law if one can choose the gap parameter $\\lambda_c$ freely.

  12. Mind The Gap

    E-Print Network [OSTI]

    Daniel F. Litim

    2001-04-25T23:59:59.000Z

    We discuss an optimisation criterion for the exact renormalisation group based on the inverse effective propagator, which displays a gap. We show that a simple extremisation of the gap stabilises the flow, leading to better convergence of approximate solutions towards the physical theory. This improves the reliability of truncations, most relevant for any high precision computation. These ideas are closely linked to the removal of a spurious scheme dependence and a minimum sensitivity condition. The issue of predictive power and a link to the Polchinski RG are discussed as well. We illustrate our findings by computing critical exponents for the Ising universality class.

  13. Essays on Firm Growth and Survival as a Fortune 500 Firm

    E-Print Network [OSTI]

    Vadakkepatt, Gautham Gopal

    2011-10-21T23:59:59.000Z

    Growth and Survival as a Fortune 500 Firm. (August 2010) Gautham Gopal Vadakkepatt, B.T.C, Trichur, Calicut University; M.En.; M.S., Texas A&M University Co-Chairs of Advisory Committee: Dr. Venkatesh Shankar Dr. Rajan Varadarajan... In this dissertation, I develop frameworks and models capturing the effects of marketing capital and R&D capital on firm growth and sustained membership in the Fortune 500 cohort. Drawing on the resource-based view (RBV) of the firm and industrial organization...

  14. GAP TESTS; COMPARISON BETWEEN UN GAP TEST AND CARD GAP TEST

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    98-36 GAP TESTS; COMPARISON BETWEEN UN GAP TEST AND CARD GAP TEST by R. BRANKA and C. MICHOT, FRANCE (tel.: 33 3 44 55 65 19, fax: 33 3 44 55 65 10) ABSTRACT: UN gap test, type 1(a) or 2(a), is the recommended test in the acceptance procedure for transport of explosives in class 1. Up to the revision

  15. Multiple gap photovoltaic device

    DOE Patents [OSTI]

    Dalal, Vikram L. (Newark, DE)

    1981-01-01T23:59:59.000Z

    A multiple gap photovoltaic device having a transparent electrical contact adjacent a first cell which in turn is adjacent a second cell on an opaque electrical contact, includes utilizing an amorphous semiconductor as the first cell and a crystalline semiconductor as the second cell.

  16. UPSTREAM COMPETITION BETWEEN VERTICALLY INTEGRATED FIRMS

    E-Print Network [OSTI]

    Boyer, Edmond

    marginal cost in equilibrium, which is detrimental to consumers' surplus and social welfare. We obtain input in order to serve final consumers. In this paper, we focus on industries in which the intermediate downstream firms, which have not built their own network. Similarly, in the mobile telephony market, Mobile

  17. Firm Size And Higher Education Graduate

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    Firm Size And Higher Education Graduate Employment In West Virginia 2010 Summary Results For Work 2012 Prepared for the West Virginia Higher Education Policy Commission By George W. Hammond, Associate Corporation Funding for this research was provided by the West Virginia Higher Education Policy Commission

  18. The impact of financial incentives on firm behavior

    E-Print Network [OSTI]

    Matsa, David

    2006-01-01T23:59:59.000Z

    This dissertation analyzes the impact of various financial incentives on firm behavior. The first two chapters examine product-market and input-market effects of a firm's capital structure and the incentives they create. ...

  19. Non-traditional growth in large, established firms

    E-Print Network [OSTI]

    Sunderrajan, Suresh, 1970-

    2004-01-01T23:59:59.000Z

    Firms must continuously strive to grow through the creation of new sources of competitive advantage. The challenges to growth are more severe for large, established firms that derive a predominant amount of their present ...

  20. Start-up manufacturing firms: operations for survival 

    E-Print Network [OSTI]

    Liu, Kuangyi

    2009-11-25T23:59:59.000Z

    Start-up firms play an important role in the economy. Statistics show that a large percent of start-up firms fail after few years of establishment. Raising capital, which is crucial to success, is one of the difficulties ...

  1. Product service transformation in product-centric firms

    E-Print Network [OSTI]

    Levitt, Benjamin (Benjamin P.)

    2014-01-01T23:59:59.000Z

    In slow or no-growth economies, firms cannot rely solely on recurring business from large, core customers who often delay or cancel capital investments in belt-tightening times. To achieve growth, firms must lever domain ...

  2. To: Microsoft's Premier Preferred Provider Law Firms From: Brad Smith

    E-Print Network [OSTI]

    Bernstein, Phil

    and the details concerning the Law Firm Diversity Program for Microsoft's Premier Preferred Provider (PPP) law that each PPP firm is eligible for a two percent quarterly or annual bonus based on whether it achieves of the PPP elections. First, we are pleased and honored to announce that all PPP firms have elected

  3. International Entry Decision for Design Firms 

    E-Print Network [OSTI]

    Tohidi Vahdat, Amin

    2013-11-22T23:59:59.000Z

    make the study of these transactions more complex. Table 1 – Illustrative Commercial Transactions Investment Characteristics Nonspecific Mixed Idiosyncratic F re q u en cy O cc as io n al Purchasing Standard Equipment Purchasing... Customized equipment Constructing a Plant R ec u rr en t Purchasing Standard Material Purchasing Customized Material Site-Specific Transfer of Intermediate Product Across Successive Stages When firms enter a new international market they assume...

  4. Mind the gap

    E-Print Network [OSTI]

    M. S. Bhagwat; A. Krassnigg; P. Maris; C. D. Roberts

    2006-12-06T23:59:59.000Z

    In this summary of the application of Dyson-Schwinger equations to the theory and phenomenology of hadrons, some deductions following from a nonperturbative, symmetry-preserving truncation are highlighted, notable amongst which are results for pseudoscalar mesons. We also describe inferences from the gap equation relating to the radius of convergence of a chiral expansion, applications to heavy-light and heavy-heavy mesons, and quantitative estimates of the contribution of quark orbital angular momentum in pseudoscalar mesons; and recapitulate upon studies of nucleon electromagnetic form factors.

  5. The small firm enters international trade

    E-Print Network [OSTI]

    Steelquist, Laura McDowell

    1973-01-01T23:59:59.000Z

    be & ditcd for ~ 6] information of benefit to the, smaller fir?& engaged i;& internationai trade. ~ The Small Business Adm inis Lrat ion ' s Fx~&&rt Marl' . t ', n n' for S. &ai 3 cr &'3 rms- provides a discussion of i oreigr I 3P] market analysis... for the small business firm and is useful in this field. However, this book does not cover the foreign cultux al environment, which may be the decisive factor in marketing, and provides no information con- cerning shipp. ', ng and finance. Many trade...

  6. Exporting licensing regulations affecting US geothermal firms

    SciTech Connect (OSTI)

    Not Available

    1988-08-01T23:59:59.000Z

    This document presents a brief introduction and overview of the Department of Commerce's Export Administration Regulations which might affect potential US geothermal goods exporters. It is intended to make US geothermal firms officials aware of the existence of such regulations and to provide them with references, contacts and phone numbers where they can obtain specific and detailed information and assistance. It must be stressed however, that the ultimate responsibility for complying with the above mentioned regulations lies with the exporter who must consult the complete version of the regulations.

  7. Domain walls in gapped graphene

    E-Print Network [OSTI]

    G. W. Semenoff; V. Semenoff; Fei Zhou

    2008-05-31T23:59:59.000Z

    The electronic properties of a particular class of domain walls in gapped graphene are investigated. We show that they can support mid-gap states which are localized in the vicinity of the domain wall and propagate along its length. With a finite density of domain walls, these states can alter the electronic properties of gapped graphene significantly. If the mid-gap band is partially filled,the domain wall can behave like a one-dimensional metal embedded in a semi-conductor, and could potentially be used as a single-channel quantum wire.

  8. Domain walls in gapped graphene

    E-Print Network [OSTI]

    Semenoff, G W; Zhou, Fei

    2015-01-01T23:59:59.000Z

    The electronic properties of a particular class of domain walls in gapped graphene are investigated. We show that they can support mid-gap states which are localized in the vicinity of the domain wall and propagate along its length. With a finite density of domain walls, these states can alter the electronic properties of gapped graphene significantly. If the mid-gap band is partially filled,the domain wall can behave like a one-dimensional metal embedded in a semi-conductor, and could potentially be used as a single-channel quantum wire.

  9. Gap and stripline combined monitor

    DOE Patents [OSTI]

    Yin, Yan (Palo Alto, CA)

    1986-01-01T23:59:59.000Z

    A combined gap and stripline monitor device (10) for measuring the intensity and position of a charged particle beam bunch in a beam pipe of a synchotron radiation facility. The monitor has first and second beam pipe portions (11a, 11b) with an axial gap (12) therebetween. An outer pipe (14) cooperates with the first beam pipe portion (11a) to form a gap enclosure, while inner strips (23a-d) cooperate with the first beam pipe portion (11a) to form a stripline monitor, with the stripline length being the same as the gap enclosure length.

  10. Maintenance & Cleaning Firm Earns Jefferson Lab's Small Business...

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

    Maintenance & Cleaning Firm Earns Jefferson Lab's Small Business Award for 2013 Prestige award Prestige Maintenance staff (left to right) Sandra Coltrain, Operations Managers John...

  11. JLab Recognizes Security Firm as Top Small Business Subcontractor...

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

    Recognizes Security Firm as Top Small Business Subcontractor for 2009 Small Business Mike Dallas, Jefferson Lab's chief operating officer, presents Nicole Stuart, Top Guard...

  12. Y-12 cleaning technology licensed by Knoxville engineering firm...

    National Nuclear Security Administration (NNSA)

    cleaning technology licensed by Knoxville engineering firm | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile...

  13. Essays on the Performance of Manufacturing Firms in Developing Countries

    E-Print Network [OSTI]

    Eifert, Benjamin Patrick

    2010-01-01T23:59:59.000Z

    firms were aware of preventive maintenance but few of themSpecific practice Preventive maintenance is carried outfor the machines Preventive maintenance is carried out per

  14. Fact Sheet: Wind Firming EnergyFarm (October 2012)

    Energy Savers [EERE]

    Electricity Delivery & Energy Reliability Energy Storage Program Primus Power American Recovery and Reinvestment Act (ARRA) Wind Firming EnergyFarm Using energy storage to...

  15. Windy Dog I | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:Wilson

  16. Windy Flats IIa extension | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension Jump to: navigation,

  17. Windy Flats Phase III | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension Jump to:

  18. Productivity and Firm Selection: Intra-National and International Trade.

    E-Print Network [OSTI]

    Sussex, University of

    Productivity and Firm Selection: Intra-National and International Trade. Gregory Corcos (NHH) Firm Selection: Intra- vs International Trade April 23, 2007 1 / 35 #12;Overview Objective: Quantify the productivity gains from inter- and intra-national trade. What we do in this paper: model the effect of trade

  19. Exports and exchange rate : a firm-level investigation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Exports and exchange rate : a firm-level investigation N° 2008-02 Février 2008 Sarah Guillou OFCE-DRIC hal-00973044,version1-3Apr2014 #12;Exports and exchange rate: a firm-level investigation Sarah Guillou February 2008 Abstract This paper investigates the relation between export behaviour and the exchange rate

  20. Achieving HR-Firm Performance Linkage through Organizational Strategy Implementation: Qualitative Case Studies of Four U.S. Based Firms

    E-Print Network [OSTI]

    Alagaraja, Meera

    2012-02-14T23:59:59.000Z

    elaborates on ways in which organizations achieve the HR-firm performance linkage using the resource-based view of the firm as a theoretical framework. In order to do so, the study examined HRM&D function involvement in lean and quality strategy (LQS...

  1. The impact of CEO option grants on firm value: determinants of the effectiveness of option grants

    E-Print Network [OSTI]

    Weber, Catherine Krueger

    2007-04-25T23:59:59.000Z

    portfolio sensitivity to stock price, was found to influence the association between stock option grants and firm value. The positive association between grants and firm value was evidenced for the sub-sample of firms that demonstrate disequilibrium in CEO...

  2. Scaling up energy efficiency: bridging the action gap

    E-Print Network [OSTI]

    percent of firms in Latin America, 38 percent of firms in South Asia and 44 percent of all firms in sub to 2050 of the International Energy Agency. Other measures, including increased use of renewable energy

  3. Six area firms receive ORNL small business awards | ornl.gov

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

    National Laboratory Communications 865.574.4399 Six area firms receive ORNL small business awards OAK RIDGE, Tenn., March 14, 2014 -- Six East Tennessee firms doing business...

  4. Risk warehousing within insurance firms and the role of securitization

    E-Print Network [OSTI]

    Strydom, Johann J. (Johann Jurie)

    2011-01-01T23:59:59.000Z

    Insurance firms perform two key economic functions. First, they intermediate risk by marketing, selling and administering insurance policies. Second, they warehouse the risks underlying those policies. If viewed as separate ...

  5. Indirect Learning: How Emerging- Market Firms Grow in Developed Markets

    E-Print Network [OSTI]

    Banerjee, Sourindra; Prabhu, Jaideep C.; Chandy, Rajesh K.

    2015-01-01T23:59:59.000Z

    -market competitors such as Nokia- Siemens Networks (operating in China). Drawing on these arguments, we hypothesize the following: H2a: Emerging-market firms that have greater exposure to developed-market competitors in their domestic market exhibit greater...

  6. The influence of institutional investors on firm value

    E-Print Network [OSTI]

    Lee, Yong Seung

    2013-01-01T23:59:59.000Z

    The impact of corporate governance on firm value has been extensively debated by academics and business practitioners. Some studies show that companies that allow minority shareholders to have more control are likely to ...

  7. When governments break contracts : foreign firms in emerging economies

    E-Print Network [OSTI]

    Wellhausen, Rachel L. (Rachel Louise)

    2012-01-01T23:59:59.000Z

    Emerging economy governments commit to protect the property rights of foreign firms through a variety of contracts, from treaties to direct agreements. In an era of liberalized capital flows, these contracts are thought ...

  8. Green Buildings: Construction Design Firms' Implementation of Sustainable Design Standards

    E-Print Network [OSTI]

    Malone, Nathan

    2008-12-19T23:59:59.000Z

    This paper is written to show the importance of green buildings and therefore the need for sustainable design. The paper describes why a construction design firm must take the steps necessary to properly integrate these sustainable design standards...

  9. Factors affecting the selling prices of small firms

    E-Print Network [OSTI]

    Somervuo, Timo J. (Timo Juhani)

    2008-01-01T23:59:59.000Z

    58 percent of the jobs in the United Stated are created by firms with fewer than 500 employees (Davis, et al. [1998]). Yet, there is only limited research done on the industry trends and conditions affecting small company ...

  10. angliiskije firm vrutsja: Topics by E-print Network

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

    choice of ... Xue, Yanfeng 2004-02-13 63 The Nature of the Firm and Peculiarities of the Corporation University of Cambridge - Dspace Summary: at all in a specialised exchange...

  11. Overseas projects finance by international institutions for Japanese construction firms

    E-Print Network [OSTI]

    Kojima, Masashi, 1968-

    2004-01-01T23:59:59.000Z

    This thesis analyzes the relationships between Japanese construction firms, and overseas projects financed by international institutions, such as the World Bank Group, United Nations, ADB, IDB, JBIC, and JICA. Japanese ...

  12. Goal Orientation as Shaping the Firm's Entrepreneurial Orientation and Performance

    E-Print Network [OSTI]

    Webb, Justin W.

    2011-02-22T23:59:59.000Z

    . Coombs Oi-man Kwok Laszlo Tihanyi Head of Department, Murray Barrick December 2009 Major Subject: Management iii ABSTRACT Goal Orientation as Shaping the Firm?s Entrepreneurial Orientation and Performance. (December 2009... Ireland and Mike Hitt, and my committee members, Laszlo Tihanyi, Joe Coombs, and Oi-man Kwok. I was exceptionally fortunate to have each of these individuals serve on my committee. I was provided extraordinary freedom in deciding my topic of interest...

  13. THE ENERGY GAP IN NUCLEAR MATTER

    E-Print Network [OSTI]

    Emery, V.J.

    2008-01-01T23:59:59.000Z

    of Physics, The Ohio State University, THE ENERGY GAP INEnergy Commission. + Permanent addross: Columbus, Ohio.

  14. Virtual gap dielectric wall accelerator

    DOE Patents [OSTI]

    Caporaso, George James; Chen, Yu-Jiuan; Nelson, Scott; Sullivan, Jim; Hawkins, Steven A

    2013-11-05T23:59:59.000Z

    A virtual, moving accelerating gap is formed along an insulating tube in a dielectric wall accelerator (DWA) by locally controlling the conductivity of the tube. Localized voltage concentration is thus achieved by sequential activation of a variable resistive tube or stalk down the axis of an inductive voltage adder, producing a "virtual" traveling wave along the tube. The tube conductivity can be controlled at a desired location, which can be moved at a desired rate, by light illumination, or by photoconductive switches, or by other means. As a result, an impressed voltage along the tube appears predominantly over a local region, the virtual gap. By making the length of the tube large in comparison to the virtual gap length, the effective gain of the accelerator can be made very large.

  15. Exports and exchange rate: a firm-level investigation Sarah Guillou

    E-Print Network [OSTI]

    Boyer, Edmond

    Exports and exchange rate: a firm-level investigation Sarah Guillou February 2008 Abstract This paper investigates the relation between export behaviour and the exchange rate at firm level. We use a dataset of French manufacturing firms from 1994 to 2004, to study the sensitivity of firms' export

  16. Multiple input electrode gap controller

    DOE Patents [OSTI]

    Hysinger, C.L.; Beaman, J.J.; Melgaard, D.K.; Williamson, R.L.

    1999-07-27T23:59:59.000Z

    A method and apparatus for controlling vacuum arc remelting (VAR) furnaces by estimation of electrode gap based on a plurality of secondary estimates derived from furnace outputs. The estimation is preferably performed by Kalman filter. Adaptive gain techniques may be employed, as well as detection of process anomalies such as glows. 17 figs.

  17. Multiple input electrode gap controller

    DOE Patents [OSTI]

    Hysinger, Christopher L. (Austin, TX); Beaman, Joseph J. (Austin, TX); Melgaard, David K. (Albuquerque, NE); Williamson, Rodney L. (Albuquerque, NE)

    1999-01-01T23:59:59.000Z

    A method and apparatus for controlling vacuum arc remelting (VAR) furnaces by estimation of electrode gap based on a plurality of secondary estimates derived from furnace outputs. The estimation is preferably performed by Kalman filter. Adaptive gain techniques may be employed, as well as detection of process anomalies such as glows.

  18. Strategic alliance announcements and new venture stock market returns: signaling and resource-based perspectives on the effects of partner firm, new venture firm, and alliance characteristics 

    E-Print Network [OSTI]

    Holmes Jr, Robert Michael

    2009-05-15T23:59:59.000Z

    Firms form marketing and technology alliances to access other firms’ resources, and these alliances act as signals to investors. Investors use these signals to adjust expectations about new venture performance prospects, but our understanding...

  19. Hard-gapped Holographic Superconductors

    E-Print Network [OSTI]

    Pallab Basu; Jianyang He; Anindya Mukherjee; Hsien-Hang Shieh

    2009-12-05T23:59:59.000Z

    In this work we discuss the zero temperature limit of a "p-wave" holographic superconductor. The bulk description consists of a non-Abelian SU(2) gauge fields minimally coupled to gravity. We numerically construct the zero temperature solution which is the gravity dual of the superconducting ground state of the "p-wave" holographic superconductors. The solution is a smooth soliton with zero horizon size and shows an emergent conformal symmetry in the IR. We found the expected superconducting behavior. Using the near horizon analysis we show that the system has a "hard gap" for the relevant gauge field fluctuations. At zero temperature the real part of the conductivity is zero for an excitation frequency less than the gap frequency. This is in contrast with what has been observed in similar scalar- gravity-gauge systems (holographic superconductors). We also discuss the low but finite temperature behavior of our solution.

  20. The History of Cranfills Gap ISD

    E-Print Network [OSTI]

    Rudd, Charla J

    2013-05-06T23:59:59.000Z

    of Bosque County, Texas ....................................... 30 4 Topographical Map of Cranfills Gap ....................................................... 34 5 Upper Meridian Creek Settlement... ............................................................ 36 6 Topographical Map of German Settlement .............................................. 37 7 Cranfills Gap Land Deed, 1888 ............................................................... 46 8 Dream Stage to Infancy Stage...

  1. Spark gap with low breakdown voltage jitter

    DOE Patents [OSTI]

    Rohwein, Gerald J. (Albuquerque, NM); Roose, Lars D. (Albuquerque, NM)

    1996-01-01T23:59:59.000Z

    Novel spark gap devices and electrodes are disclosed. The novel spark gap devices and electrodes are suitable for use in a variety of spark gap device applications. The shape of the electrodes gives rise to local field enhancements and reduces breakdown voltage jitter. Breakdown voltage jitter of approximately 5% has been measured in spark gaps according the invention. Novel electrode geometries and materials are disclosed.

  2. Spark gap with low breakdown voltage jitter

    DOE Patents [OSTI]

    Rohwein, G.J.; Roose, L.D.

    1996-04-23T23:59:59.000Z

    Novel spark gap devices and electrodes are disclosed. The novel spark gap devices and electrodes are suitable for use in a variety of spark gap device applications. The shape of the electrodes gives rise to local field enhancements and reduces breakdown voltage jitter. Breakdown voltage jitter of approximately 5% has been measured in spark gaps according the invention. Novel electrode geometries and materials are disclosed. 13 figs.

  3. Low band gap polymers Organic Photovoltaics

    E-Print Network [OSTI]

    Low band gap polymers for Organic Photovoltaics Eva Bundgaard Ph.D. Dissertation Risø National Bundgaard Title: Low band gap polymers for Organic photovoltaics Department: The polymer department Report the area of organic photovoltaics are focusing on low band gap polymers, a type of polymer which absorbs

  4. Air Gap Tunin Yilin Mao, Yashwanth

    E-Print Network [OSTI]

    Elsherbeni, Atef Z.

    Air Gap Tunin Yilin Mao, Yashwanth Electrical Engineering Departm The Unive ymao1@olemiss.edu, ypadooru@ Abstract-- An adjustable air gap was proposed the resonant frequency of patch antennas the frequency of coaxially fed p center conductor has to be de-soldered and r time the width of the air gap

  5. Calibration curves for some standard Gap Tests

    SciTech Connect (OSTI)

    Bowman, A.L.; Sommer, S.C.

    1989-01-01T23:59:59.000Z

    The relative shock sensitivities of explosive compositions are commonly assessed using a family of experiments that can be described by the generic term ''Gap Test.'' Gap tests include a donor charge, a test sample, and a spacer, or gap, between two explosives charges. The donor charge, gap material, and test dimensions are held constant within each different version of the gap test. The thickness of the gap is then varied to find the value at which 50% of the test samples will detonate. The gap tests measure the ease with a high-order detonation can be established in the test explosive, or the ''detonability,'' of the explosive. Test results are best reported in terms of the gap thickness at the 50% point. It is also useful to define the shock pressure transmitted into the test sample at the detonation threshold. This requires calibrating the gap test in terms of shock pressure in the gap as a function of the gap thickness. It also requires a knowledge of the shock Hugoniot of the sample explosive. We used the 2DE reactive hydrodynamic code with Forest Fire burn rates for the donor explosives to calculate calibration curves for several gap tests. The model calculations give pressure and particle velocity on the centerline of the experimental set-up and provide information about the curvature and pulse width of the shock wave. 10 refs., 1 fig.

  6. FAQS Gap Analysis Qualification Card - Senior Technical Safety...

    Office of Environmental Management (EM)

    Gap Analysis Qualification Card - Senior Technical Safety Manager FAQS Gap Analysis Qualification Card - Senior Technical Safety Manager Functional Area Qualification Standard Gap...

  7. Machinery sharing by agribusiness firms: methodology, application, and simulation

    E-Print Network [OSTI]

    Wolfley, Jared Lynn

    2009-05-15T23:59:59.000Z

    entering into a joint machinery ownership contract are examined. Two, two-player models, a Nash equilibrium game theoretical model and an applied two-farm simulation model are used to determine impacts of machinery sharing on firms engaged in machinery...

  8. Acquiring firm long-term performance and governance characteristics

    E-Print Network [OSTI]

    Breazeale, Jonathan Paul

    2004-09-30T23:59:59.000Z

    and directors, and InstOwn is the percentage of the firm owned by large outside block shareholders. Value-weighted calendar-time portfolios consisting of the full sample of acquirers exhibit significant abnormal returns of 9.12%, 33.84% and 55.8% for the 12...

  9. Pricing and Firm Conduct in California's Deregulated Electricity Market

    E-Print Network [OSTI]

    California at Berkeley. University of

    PWP-080 Pricing and Firm Conduct in California's Deregulated Electricity Market Steven L. Puller of the Program on Workable Energy Regulation (POWER). POWER is a program of the University of California Energy. University of California Energy Institute 2539 Channing Way Berkeley, California 94720-5180 www

  10. Real Time Pricing and the Real Live Firm

    SciTech Connect (OSTI)

    Moezzi, Mithra; Goldman, Charles; Sezgen, Osman; Bharvirkar, Ranjit; Hopper, Nicole

    2004-05-26T23:59:59.000Z

    Energy economists have long argued the benefits of real time pricing (RTP) of electricity. Their basis for modeling customers response to short-term fluctuations in electricity prices are based on theories of rational firm behavior, where management strives to minimize operating costs and optimize profit, and labor, capital and energy are potential substitutes in the firm's production function. How well do private firms and public sector institutions operating conditions, knowledge structures, decision-making practices, and external relationships comport with these assumptions and how might this impact price response? We discuss these issues on the basis of interviews with 29 large (over 2 MW) industrial, commercial, and institutional customers in the Niagara Mohawk Power Corporation service territory that have faced day-ahead electricity market prices since 1998. We look at stories interviewees told about why and how they respond to RTP, why some customers report that they can't, and why even if they can, they don't. Some firms respond as theorized, and we describe their load curtailment strategies. About half of our interviewees reported that they were unable to either shift or forego electricity consumption even when prices are high ($0.50/kWh). Reasons customers gave for why they weren't price-responsive include implicit value placed on reliability, pricing structures, lack of flexibility in adjusting production inputs, just-in-time practices, perceived barriers to onsite generation, and insufficient time. We draw these observations into a framework that could help refine economic theory of dynamic pricing by providing real-world descriptions of how firms behave and why.

  11. Strategies to Address Risks of Platinum Scarcity for Supply Chain Downstream Firms

    E-Print Network [OSTI]

    Kirchain, Randolph E., Jr.

    Increased recycling, product redesign and substitution can improve firm resilience in the face of uncertainties in materials availability. The delays involved in implementing these strategies may result in unprepared firms ...

  12. The Effects of Firm Size, Corporate Governance Quality, and Bad News on Disclosure Compliance

    E-Print Network [OSTI]

    Ettredge, Michael L.; Johnstone, Karla; Stone, Mary S.; Wang, Qian

    2011-01-01T23:59:59.000Z

    Motivated by calls for increased compliance, size-based regulation, and continued exemption of small firms from internal control reporting requirements, we assess the incremental effects of firm size, corporate governance ...

  13. Do Firms Want to Borrow More? Testing Credit Constraints Using a Directed Lending Program

    E-Print Network [OSTI]

    Banerjee, Abhijit

    This article uses variation in access to a targeted lending program to estimate whether firms are credit constrained. While both constrained and unconstrained firms may be willing to absorb all the directed credit that ...

  14. Complementary capabilities in dynamic environments : the evolution of professional services in information technology product firms

    E-Print Network [OSTI]

    Anderson, Phillip C., Ph. D. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    The innovative firm must continually evaluate its boundaries - decisions often shaped through make-buy-partner evaluations and choices about where to define the firm's competences. Building off of earlier work that suggests ...

  15. Innovations in professional services firms engaged in outsourcing of IT services

    E-Print Network [OSTI]

    Kulkarni, Shridhar Waman

    2009-01-01T23:59:59.000Z

    The objective of this thesis is to understand the unique features of Professional Services Firms and the challenges associated with effective knowledge management in these firms. A framework is developed to analyze innovations ...

  16. EIS-0400: EPA Notice of Availability of Final Environmental Impact...

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

    Final Environmental Impact Statement EIS-0400: EPA Notice of Availability of Final Environmental Impact Statement Granby Pumping Plant Switchyard-Windy Gap Substation Transmission...

  17. EIS-0400: EPA Notice of Availability of a Draft Environmental...

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

    a Draft Environmental Impact Statement EIS-0400: EPA Notice of Availability of a Draft Environmental Impact Statement Grandby Pumping Plant Switchyard Windy Gap Substation...

  18. CX-011621: Categorical Exclusion Determination | Department of...

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

    Determination CX-011621: Categorical Exclusion Determination Windy Gap-Granby Pumping Plant and Granby Pumping Plant-Mary's Lake (West Portal) 69-kilovolt Transmission...

  19. HOW CEO ATTRIBUTES AFFECT FIRM R&D SPENDING? NEW EVIDENCE FROM A

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    evidence on the crucial role played by research and development (hereafter R&D) activities in enhancing1 HOW CEO ATTRIBUTES AFFECT FIRM R&D SPENDING? NEW EVIDENCE FROM A PANEL OF FRENCH FIRMS Basma the relationship between CEO attributes and R&D spending. Using a sample of French firms listed on Euronext Paris

  20. Productivity and Market Selection of French Manufacturing Firms in the Nineties

    E-Print Network [OSTI]

    Boyer, Edmond

    ,version1-3Apr2014 #12;Abstract: This paper analyses post-entry and pre-exit performance of French firms11, L60. Keywords: entry and exit patterns, firm level data, TFP indexes, market selection hal productive firm heterogeneity and industrial dynamics (entry, exit and reallocation of market shares) have

  1. Photonic band gap structure simulator

    DOE Patents [OSTI]

    Chen, Chiping; Shapiro, Michael A.; Smirnova, Evgenya I.; Temkin, Richard J.; Sirigiri, Jagadishwar R.

    2006-10-03T23:59:59.000Z

    A system and method for designing photonic band gap structures. The system and method provide a user with the capability to produce a model of a two-dimensional array of conductors corresponding to a unit cell. The model involves a linear equation. Boundary conditions representative of conditions at the boundary of the unit cell are applied to a solution of the Helmholtz equation defined for the unit cell. The linear equation can be approximated by a Hermitian matrix. An eigenvalue of the Helmholtz equation is calculated. One computation approach involves calculating finite differences. The model can include a symmetry element, such as a center of inversion, a rotation axis, and a mirror plane. A graphical user interface is provided for the user's convenience. A display is provided to display to a user the calculated eigenvalue, corresponding to a photonic energy level in the Brilloin zone of the unit cell.

  2. Narrow gap electronegative capacitive discharges

    SciTech Connect (OSTI)

    Kawamura, E.; Lieberman, M. A.; Lichtenberg, A. J. [Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720 (United States)] [Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, California 94720 (United States)

    2013-10-15T23:59:59.000Z

    Narrow gap electronegative (EN) capacitive discharges are widely used in industry and have unique features not found in conventional discharges. In this paper, plasma parameters are determined over a range of decreasing gap length L from values for which an electropositive (EP) edge exists (2-region case) to smaller L-values for which the EN region connects directly to the sheath (1-region case). Parametric studies are performed at applied voltage V{sub rf}=500 V for pressures of 10, 25, 50, and 100 mTorr, and additionally at 50 mTorr for 1000 and 2000 V. Numerical results are given for a parallel plate oxygen discharge using a planar 1D3v (1 spatial dimension, 3 velocity components) particle-in-cell (PIC) code. New interesting phenomena are found for the case in which an EP edge does not exist. This 1-region case has not previously been investigated in detail, either numerically or analytically. In particular, attachment in the sheaths is important, and the central electron density n{sub e0} is depressed below the density n{sub esh} at the sheath edge. The sheath oscillations also extend into the EN core, creating an edge region lying within the sheath and not characterized by the standard diffusion in an EN plasma. An analytical model is developed using minimal inputs from the PIC results, and compared to the PIC results for a base case at V{sub rf}=500 V and 50 mTorr, showing good agreement. Selected comparisons are made at the other voltages and pressures. A self-consistent model is also developed and compared to the PIC results, giving reasonable agreement.

  3. Chiral gap effect in curved space

    E-Print Network [OSTI]

    Antonino Flachi; Kenji Fukushima

    2014-06-25T23:59:59.000Z

    We discuss a new type of QCD phenomenon induced in curved space. In the QCD vacuum a mass gap of Dirac fermions is attributed to the spontaneous breaking of chiral symmetry. If the curvature is positive large, the chiral condensate melts but a chiral invariant mass gap can still remain, which we name the chiral gap effect in curved space. This leads to decoupling of quark deconfinement which implies a view of black holes surrounded by a first-order QCD phase transition.

  4. Gap between active and passive solar heating

    SciTech Connect (OSTI)

    Balcomb, J.D.

    1985-01-01T23:59:59.000Z

    The gap between active and passive solar could hardly be wider. The reasons for this are discussed and advantages to narrowing the gap are analyzed. Ten years of experience in both active and passive systems are reviewed, including costs, frequent problems, performance prediction, performance modeling, monitoring, and cooling concerns. Trends are analyzed, both for solar space heating and for service water heating. A tendency for the active and passive technologies to be converging is observed. Several recommendations for narrowing the gap are presented.

  5. FAQS Gap Analysis Qualification Card – Radiation Protection

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  6. FAQS Gap Analysis Qualification Card – Mechanical Systems

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  7. FAQS Gap Analysis Qualification Card – Environmental Restoration

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  8. Undecidability of the Spectral Gap (short version)

    E-Print Network [OSTI]

    Cubitt, Toby; Wolf, Michael M

    2015-01-01T23:59:59.000Z

    The spectral gap -- the difference in energy between the ground state and the first excited state -- is one of the most important properties of a quantum many-body system. Quantum phase transitions occur when the spectral gap vanishes and the system becomes critical. Much of physics is concerned with understanding the phase diagrams of quantum systems, and some of the most challenging and long-standing open problems in theoretical physics concern the spectral gap, such as the Haldane conjecture that the Heisenberg chain is gapped for integer spin, proving existence of a gapped topological spin liquid phase, or the Yang-Mills gap conjecture (one of the Millennium Prize problems). These problems are all particular cases of the general spectral gap problem: Given a quantum many-body Hamiltonian, is the system it describes gapped or gapless? Here we show that this problem is undecidable, in the same sense as the Halting Problem was proven to be undecidable by Turing. A consequence of this is that the spectral gap...

  9. Undecidability of the Spectral Gap (short version)

    E-Print Network [OSTI]

    Toby Cubitt; David Perez-Garcia; Michael M. Wolf

    2015-02-13T23:59:59.000Z

    The spectral gap -- the difference in energy between the ground state and the first excited state -- is one of the most important properties of a quantum many-body system. Quantum phase transitions occur when the spectral gap vanishes and the system becomes critical. Much of physics is concerned with understanding the phase diagrams of quantum systems, and some of the most challenging and long-standing open problems in theoretical physics concern the spectral gap, such as the Haldane conjecture that the Heisenberg chain is gapped for integer spin, proving existence of a gapped topological spin liquid phase, or the Yang-Mills gap conjecture (one of the Millennium Prize problems). These problems are all particular cases of the general spectral gap problem: Given a quantum many-body Hamiltonian, is the system it describes gapped or gapless? Here we show that this problem is undecidable, in the same sense as the Halting Problem was proven to be undecidable by Turing. A consequence of this is that the spectral gap of certain quantum many-body Hamiltonians is not determined by the axioms of mathematics, much as Goedels incompleteness theorem implies that certain theorems are mathematically unprovable. We extend these results to prove undecidability of other low temperature properties, such as correlation functions. The proof hinges on simple quantum many-body models that exhibit highly unusual physics in the thermodynamic limit.

  10. FAQS Gap Analysis Qualification Card – Criticality Safety

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  11. FAQS Gap Analysis Qualification Card – Construction Management

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  12. Gap Assessment (FY 13 Update)

    SciTech Connect (OSTI)

    Getman, Dan

    2013-09-30T23:59:59.000Z

    To help guide its future data collection efforts, The DOE GTO funded a data gap analysis in FY2012 to identify high potential hydrothermal areas where critical data are needed. This analysis was updated in FY2013 and the resulting datasets are represented by this metadata. The original process was published in FY 2012 and is available here: https://pangea.stanford.edu/ERE/db/GeoConf/papers/SGW/2013/Esposito.pdf Though there are many types of data that can be used for hydrothermal exploration, five types of exploration data were targeted for this analysis. These data types were selected for their regional reconnaissance potential, and include many of the primary exploration techniques currently used by the geothermal industry. The data types include: 1. well data 2. geologic maps 3. fault maps 4. geochemistry data 5. geophysical data To determine data coverage, metadata for exploration data (including data type, data status, and coverage information) were collected and catalogued from nodes on the National Geothermal Data System (NGDS). It is the intention of this analysis that the data be updated from this source in a semi-automated fashion as new datasets are added to the NGDS nodes. In addition to this upload, an online tool was developed to allow all geothermal data providers to access this assessment and to directly add metadata themselves and view the results of the analysis via maps of data coverage in Geothermal Prospector (http://maps.nrel.gov/gt_prospector). A grid of the contiguous U.S. was created with 88,000 10-km by 10-km grid cells, and each cell was populated with the status of data availability corresponding to the five data types. Using these five data coverage maps and the USGS Resource Potential Map, sites were identified for future data collection efforts. These sites signify both that the USGS has indicated high favorability of occurrence of geothermal resources and that data gaps exist. The uploaded data are contained in two data files for each data category. The first file contains the grid and is in the SHP file format (shape file.) Each populated grid cell represents a 10k area within which data is known to exist. The second file is a CSV (comma separated value) file that contains all of the individual layers that intersected with the grid. This CSV can be joined with the map to retrieve a list of datasets that are available at any given site. The attributes in the CSV include: 1. grid_id : The id of the grid cell that the data intersects with 2. title: This represents the name of the WFS service that intersected with this grid cell 3. abstract: This represents the description of the WFS service that intersected with this grid cell 4. gap_type: This represents the category of data availability that these data fall within. As the current processing is pulling data from NGDS, this category universally represents data that are available in the NGDS and are ready for acquisition for analytic purposes. 5. proprietary_type: Whether the data are considered proprietary 6. service_type: The type of service 7. base_url: The service URL

  13. Achieving HR-Firm Performance Linkage through Organizational Strategy Implementation: Qualitative Case Studies of Four U.S. Based Firms 

    E-Print Network [OSTI]

    Alagaraja, Meera

    2012-02-14T23:59:59.000Z

    LQS Lean and Quality Strategy HRM&D Human Resource Management & Development C1 Company 1 (Industrial Distributor) C2 Company 2 (Electronics Distributor) C3 Company 3 (Automotive Distributor) C4 Company 4 (Chemical Distributor) ix TABLE..., electronics, automotive and chemical), they jointly shared and yet differentiate firm and HR specific characteristics. Thus organizations situate HRM&D differently in the cases offering a balance of similarity and differences in leveraging available...

  14. Drop short control of electrode gap

    DOE Patents [OSTI]

    Fisher, Robert W. (Albuquerque, NM); Maroone, James P. (Albuquerque, NM); Tipping, Donald W. (Albuquerque, NM); Zanner, Frank J. (Sandia Park, NM)

    1986-01-01T23:59:59.000Z

    During vacuum consumable arc remelting the electrode gap between a consumable electrode and a pool of molten metal is difficult to control. The present invention monitors drop shorts by detecting a decrease in the voltage between the consumable electrode and molten pool. The drop shorts and their associated voltage reductions occur as repetitive pulses which are closely correlated to the electrode gap. Thus, the method and apparatus of the present invention controls electrode gap based upon drop shorts detected from the monitored anode-cathode voltage. The number of drop shorts are accumulated, and each time the number of drop shorts reach a predetermined number, the average period between drop shorts is calculated from this predetermined number and the time in which this number is accumulated. This average drop short period is used in a drop short period electrode gap model which determines the actual electrode gap from the drop short. The actual electrode gap is then compared with a desired electrode gap which is selected to produce optimum operating conditions and the velocity of the consumable error is varied based upon the gap error. The consumable electrode is driven according to any prior art system at this velocity. In the preferred embodiment, a microprocessor system is utilized to perform the necessary calculations and further to monitor the duration of each drop short. If any drop short exceeds a preset duration period, the consumable electrode is rapidly retracted a predetermined distance to prevent bonding of the consumable electrode to the molten remelt.

  15. Narrow band gap amorphous silicon semiconductors

    DOE Patents [OSTI]

    Madan, A.; Mahan, A.H.

    1985-01-10T23:59:59.000Z

    Disclosed is a narrow band gap amorphous silicon semiconductor comprising an alloy of amorphous silicon and a band gap narrowing element selected from the group consisting of Sn, Ge, and Pb, with an electron donor dopant selected from the group consisting of P, As, Sb, Bi and N. The process for producing the narrow band gap amorphous silicon semiconductor comprises the steps of forming an alloy comprising amorphous silicon and at least one of the aforesaid band gap narrowing elements in amount sufficient to narrow the band gap of the silicon semiconductor alloy below that of amorphous silicon, and also utilizing sufficient amounts of the aforesaid electron donor dopant to maintain the amorphous silicon alloy as an n-type semiconductor.

  16. Is environmental impact assessment regulation a 'burden' to private firms?

    SciTech Connect (OSTI)

    Annandale, David; Taplin, Ross

    2003-05-01T23:59:59.000Z

    The impact of environmental regulation on macroeconomic performance has been studied in some depth over the last 15 years. Similarly, impact on profit performance, investment intention and location decisions of firms has also been studied, although in less depth. There has been less academic interest, however, in the impact that environmental regulation has on the strategic objectives of companies. This article reports on a research project that focused on the impact that environmental approvals regulation (predominantly environmental impact assessment, EIA) has on proposed new development in the international mining sector. Based on a large and externally valid survey of senior mining company executives in Australia and Canada in the late 1990s, the research indicated that a significant majority of firms consider the environmental approvals process to be an important determinant of investment strategy. An initial reaction to these figures might suggest that the majority of respondents believe the environmental approvals process to be a negative influence. However, further questioning indicated that only a small proportion of companies in both countries thought of the environmental approvals process as an impediment to development. Instead, it is clear that most firms see EIA as a catalyst for integrating environmental design into the early planning of a project, thereby alleviating the need to spend money on overcoming environmental problems once a poorly designed project has been commissioned. The somewhat surprising conclusion that companies see environmental approvals regulation as important, but as an encouragement to development rather than as an impediment, goes against much previous industry and academic comment and, at least in relation to the mining sector, refutes the idea that EIA is ''burdensome''.

  17. FirmGreen Energy Inc FGE | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdf Jump to:ar-80m.pdfFillmore County, Minnesota:Island, NewFirmGreen Energy Inc

  18. Engine piston having an insulating air gap

    DOE Patents [OSTI]

    Jarrett, Mark Wayne (Washington, IL); Hunold,Brent Michael (Apex, NC)

    2010-02-02T23:59:59.000Z

    A piston for an internal combustion engine has an upper crown with a top and a bottom surface, and a lower crown with a top and a bottom surface. The upper crown and the lower crown are fixedly attached to each other using welds, with the bottom surface of the upper crown and the top surface of the lower crown forming a mating surface. The piston also has at least one centrally located air gap formed on the mating surface. The air gap is sealed to prevent substantial airflow into or out of the air gap.

  19. Chiral gap effect in curved space

    E-Print Network [OSTI]

    Antonino Flachi; Kenji Fukushima

    2015-05-29T23:59:59.000Z

    We discuss a new type of QCD phenomenon induced in curved space. In the QCD vacuum, a mass-gap of Dirac fermions is attributed to the spontaneous breaking of chiral symmetry. If the curvature is positive large, the chiral condensate melts but a chiral invariant mass-gap can still remain, which we name the chiral gap effect in curved space. This leads to decoupling of quark deconfinement which implies a view of black holes surrounded by a first-order QCD phase transition.

  20. Are We Closing the School Discipline Gap?

    E-Print Network [OSTI]

    Losen, Daniel; Hodson, Cheri; Keith II, Michael A; Morrison, Katrina; Belway, Shakti

    2015-01-01T23:59:59.000Z

    D.J. , (Ed). Closing the School Discipline Gap: EquitableBooth, E.A. (2011). Breaking schools’ rules: A statewidestudy of how school discipline relates to students’ success

  1. Columbia River Component Data Gap Analysis

    SciTech Connect (OSTI)

    L. C. Hulstrom

    2007-10-23T23:59:59.000Z

    This Data Gap Analysis report documents the results of a study conducted by Washington Closure Hanford (WCH) to compile and reivew the currently available surface water and sediment data for the Columbia River near and downstream of the Hanford Site. This Data Gap Analysis study was conducted to review the adequacy of the existing surface water and sediment data set from the Columbia River, with specific reference to the use of the data in future site characterization and screening level risk assessments.

  2. Social firms as a means of vocational recovery for people with mental illness: a UK survey

    E-Print Network [OSTI]

    Gilbert, Eleanor; Marwaha, Steven; Milton, Alyssa; Johnson, Sonia; Morant, Nicola; Parsons, Nicholas; Fisher, Adrian; Singh, Swaran; Cunliffe, Di

    2013-07-11T23:59:59.000Z

    disorders. They are currently an underdeveloped sector in the UK. l firm, Social enterpriseAdrian Fisher7, Swaran Singh2 and Di Cunliffe8© 2013 Gilbert et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms... of the Social Firm model from the perspective of both those with mental health problems and managers of Social Firms may assist to inform future developmentCompeting interests Di Cunliffe is an employee of Social Firms UK, an umbrella organisation which promotes...

  3. Firm Value and Corporate Governance: How the Former Determines the Latter

    E-Print Network [OSTI]

    Hermalin, Benjamin E.

    2008-01-01T23:59:59.000Z

    The Econometrics of Corporate Governance Studies, Cambridge,Firm Value and Corporate Governance: How the FormerAbstract A model of corporate governance must explain (i)

  4. Do Investors Forecast Fat Firms? Evidence from the Gold Mining Industry

    E-Print Network [OSTI]

    Borenstein, Severin; Farrell, Joseph

    2006-01-01T23:59:59.000Z

    Fat Firms? Evidence from the Gold Mining Industry Abstract:market valuations of gold mining companies vary with goldstock values of many gold mining companies are concave in

  5. When Do Firms Hire Lobbyists? The Organization of Lobbying at the Federal Communications Commission

    E-Print Network [OSTI]

    de Figueiredo, John

    2004-12-10T23:59:59.000Z

    This paper examines the explanatory power of transaction cost economics to explain vertical integration decisions for lobbying by firms. We examine 150 lobbying contacts at the Federal Communications ...

  6. Code Gaps and Future Research Needs of Combustion Safety: Building...

    Energy Savers [EERE]

    Code Gaps and Future Research Needs of Combustion Safety: Building America Expert Meeting Update Code Gaps and Future Research Needs of Combustion Safety: Building America Expert...

  7. Summary of Gaps and Barriers for Implementing Residential Building...

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

    Gaps and Barriers for Implementing Residential Building Energy Efficiency Strategies Summary of Gaps and Barriers for Implementing Residential Building Energy Efficiency Strategies...

  8. Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries...

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

    Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries. Band-Gap Engineering of Carbon Nanotubes with Grain Boundaries. Abstract: Structure and electronic properties of...

  9. NWChem: Bridging the Gap Between Experimental and Computational...

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

    NWChem: Bridging the Gap Between Experimental and Computational Chemistry NWChem: Bridging the Gap Between Experimental and Computational Chemistry Intel recently interviewed...

  10. antiparticle spectrometer gaps: Topics by E-print Network

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

    Next Page Last Page Topic Index 1 The General Antiparticle Spectrometer (GAPS) - Hunt for dark matter using low-energy antideuterons CERN Preprints Summary: The GAPS experiment is...

  11. CHP: Connecting the Gap between Markets and Utility Interconnection...

    Office of Environmental Management (EM)

    CHP: Connecting the Gap between Markets and Utility Interconnection and Tariff Practices, 2006 CHP: Connecting the Gap between Markets and Utility Interconnection and Tariff...

  12. Health-Insurer Bargaining Power and Firms' Incentives to Manage Earnings Francesco Bova

    E-Print Network [OSTI]

    Tipple, Brett

    Health-Insurer Bargaining Power and Firms' Incentives to Manage Earnings Francesco Bova Rotman Power and Firms' Incentives to Manage Earnings 1. Introduction The United States relies primarily School of Management University of Toronto Francesco.Bova@rotman.utoronto.ca Yiwei Dou Stern School

  13. Managerial Incentive Horizons and the Quality of Firms' Information Environments Jianxin (Daniel) Chi

    E-Print Network [OSTI]

    in the short-term speculative component of the stock price. Current shareholders benefit from the option` information environments. When a firm`s managerial incentive horizon is short, it is more likely to report are consistent with the hypothesis that short incentive horizons induce managers to adopt strategies that reduce

  14. Do Generation Firms in Restructured Electricity Markets Have Incentives to Support Socially-Efficient Transmission Investments? *

    E-Print Network [OSTI]

    transmission rights (FTRs) by generation firms. We investigate the way in which the allocation of FTRs may-Efficient Transmission Investments? * Enzo E. Sauma a, ** , Shmuel S. Oren b a Industrial and Systems Engineering that generation firms have in restructured electricity markets for supporting long-term transmission investments

  15. ANALYSE DES DETERMINANTS DE LA GESTION DES RESULTATS : CAS DES FIRMES CANADIENNES FRANCAISES ET TUNISIENNES

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    - 1 - ANALYSE DES DETERMINANTS DE LA GESTION DES RESULTATS : CAS DES FIRMES CANADIENNES FRANCAISES)" #12;- 2 - ANALYSE DES DETERMINANTS DE LA GESTION DES RESULTATS : CAS DES FIRMES CANADIENNES FRANCAISES article sans l'aval écrit des auteurs'' "Please do not cote wihout authors' written permission" Adresse de

  16. Developing a Model for Planning and Controlling Production in Small Sized Building Firms Proceedings IGLC `98

    E-Print Network [OSTI]

    Tommelein, Iris D.

    Developing a Model for Planning and Controlling Production in Small Sized Building Firms Proceedings IGLC `98 DEVELOPING A MODEL FOR PLANNING AND CONTROLLING PRODUCTION IN SMALL SIZED BUILDING FIRMS process of a model for planning and controlling production in small sized building companies, as well

  17. Dynamics of regeneration gaps following harvest of aspen stands

    E-Print Network [OSTI]

    Macdonald, Ellen

    Dynamics of regeneration gaps following harvest of aspen stands Daniel A. MacIsaac, Philip G in postharvest regeneration in five stands in north- western Alberta dominated by trembling aspen (Populus conditions in 30 aspen regeneration gaps (gaps in regeneration that were not gaps preharvest and were not due

  18. Homolumo gap from dynamical energy levels

    SciTech Connect (OSTI)

    Andric, I.; Jonke, L.; Jurman, D.; Nielsen, H. B. [Theoretical Physics Division, Rudjer Boskovic Institute, P.O. Box 180, 10002 Zagreb (Croatia); Niels Bohr Institute, Copenhagen DK 2100 (Denmark)

    2009-11-15T23:59:59.000Z

    We introduce a dynamical matrix model where the matrix is interpreted as a Hamiltonian representing interaction of a bosonic system with a single fermion. We show how a system of second-quantized fermions influences the ground state of the whole system by producing a gap between the highest eigenvalue of the occupied single-fermion states and the lowest eigenvalue of the unoccupied single-fermion states. We describe the development of the gap in both the strong and weak coupling regimes, while for the intermediate coupling strength we expect formation of homolumo kinks.

  19. Natural Gas Engine Development Gaps (Presentation)

    SciTech Connect (OSTI)

    Zigler, B.T.

    2014-03-01T23:59:59.000Z

    A review of current natural gas vehicle offerings is presented for both light-duty and medium- and heavy-duty applications. Recent gaps in the marketplace are discussed, along with how they have been or may be addressed. The stakeholder input process for guiding research and development needs via the Natural Gas Vehicle Technology Forum (NGVTF) to the U.S. Department of Energy and the California Energy Commission is reviewed. Current high-level natural gas engine development gap areas are highlighted, including efficiency, emissions, and the certification process.

  20. Gribov gap equation at finite temperature

    E-Print Network [OSTI]

    Fabrizio Canfora; Pablo Pais; Patricio Salgado-Rebolledo

    2014-06-05T23:59:59.000Z

    In this paper the Gribov gap equation at finite temperature is analyzed. The solutions of the gap equation (which depend explicitly on the temperature) determine the structure of the gluon propagator within the semi-classical Gribov approach. The present analysis is consistent with the standard confinement scenario for low temperatures, while for high enough temperatures, deconfinement takes place and a free gluon propagator is obtained. It also suggests the presence of the so-called semi-quark-gluon-plasma phase in between the confined and quark-gluon plasma phases.

  1. Trainers by design : a case study of inter-firm learning, institution building and local governance in western Mexico

    E-Print Network [OSTI]

    Lowe, Nichola J

    2003-01-01T23:59:59.000Z

    Studies of international economic development often feature the competitive gains from inter-firm cooperation. By cooperating, firms within a region can draw on their collective resources and experience to test out new ...

  2. FINAL REPORT ON GDE GAP CELL

    SciTech Connect (OSTI)

    Herman, D.; Summers, W.; Danko, E.

    2009-09-28T23:59:59.000Z

    A project has been undertaken to develop an electrochemical cell and support equipment for evaluation of a gas diffusion electrode-based, narrow-electrolyte-gap anode for SO{sub 2} oxidation in the hydrogen production cycle of the hybrid sulfur (HyS) process. The project supported the HyS development program at the Savannah River National Lab (SRNL). The benefits of using a gas diffusion electrode in conjunction with the narrow anolyte gap are being determined through electrochemical polarization testing under a variety conditions, and by comparison to results produced by SRNL and others using anode technologies that have no anolyte gap. These test results indicate that the NGA cell has low resistance suitable for use in the HyS electrolyzer, exhibits good efficiency at high current densities compared to the direct feed HyS electrolyzer, and indicates robust performance in extended testing over 65 hours. Seepage episodes were mostly caused by port clogging, which can be mitigated in future designs through minor modifications to the hardware. Significant reductions in sulfur crossover have not yet been demonstrated in the NGA configuration compared to in-house direct feed testing, but corroborative sulfur layer analysis is as yet incomplete. Further testing in a single-pass anolyte configuration is recommended for complete evaluation of steady-state electrochemical efficiency and SO{sub 2} crossover in the narrow gap configuration.

  3. SHEEP MOUNTAIN URANIUM PROJECT CROOKS GAP, WYOMING

    E-Print Network [OSTI]

    SHEEP MOUNTAIN URANIUM PROJECT CROOKS GAP, WYOMING US EPA Project Meeting April 7 2011April 7, 2011/Titan Uranium, VP Development · Deborah LebowAal/EPA Region 8 Air Program Introduction to Titan Uranium USA;PROJECT OVERVIEW ·Site Location·Site Location ·Fremont , Wyoming ·Existing Uranium Mine Permit 381C

  4. Gapped spin Hamiltonian motivated by quantum teleportation

    E-Print Network [OSTI]

    Ari Mizel

    2014-10-07T23:59:59.000Z

    We construct a Hamiltonian whose ground state encodes a time-independent emulation of quan- tum teleportation. We calculate properties of the Hamiltonian, using exact diagonalization and a mean-field theory, and argue that it has a gap. The system exhibits an illuminating relationship to the well-known AKLT (Affleck, Lieb, Kennedy and Tasaki) model.

  5. Investigating the Structure of the Windy Torus in Quasars

    E-Print Network [OSTI]

    Gallagher, S C; Abado, M M; Keating, S K

    2015-01-01T23:59:59.000Z

    Thermal mid-infrared emission of quasars requires an obscuring structure that can be modeled as a magneto-hydrodynamic wind in which radiation pressure on dust shapes the outflow. We have taken the dusty wind models presented by Keating and collaborators that generated quasar mid-infrared spectral energy distributions (SEDs), and explored their properties (such as geometry, opening angle, and ionic column densities) as a function of Eddington ratio and X-ray weakness. In addition, we present new models with a range of magnetic field strengths and column densities of the dust-free shielding gas interior to the dusty wind. We find this family of models -- with input parameters tuned to accurately match the observed mid-IR power in quasar SEDs -- provides reasonable values of the Type 1 fraction of quasars and the column densities of warm absorber gas, though it does not explain a purely luminosity-dependent covering fraction for either. Furthermore, we provide predictions of the cumulative distribution of E(B-V...

  6. Discrete Optimization Lower bounds and heuristics for the Windy Rural

    E-Print Network [OSTI]

    Fernández de Córdoba, Pedro

    or not they are consid- ered as non-required edges. Hence, the problem of finding a minimum energy consumption traversal of the known single-vehicle Arc Routing Prob- lems, and it is the mathematical model describing several real periodi- cally. The possibility of using autonomous robots equipped with TV cameras represents a very

  7. The windy city : harnessing power in the neighborhood landscape

    E-Print Network [OSTI]

    Cherry, Jonathan S. (Jonathan Sher)

    2008-01-01T23:59:59.000Z

    As wind power has spread in North America, so has an awareness that community acceptance will largely determine whether this renewable energy source continues to grow. Despite apparently widespread popular support for wind ...

  8. Windy Flats(3Q09 portion) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension Jump to:Flats

  9. Windy Point (08) Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension Jump to:Flats(08)

  10. Windy Point - REpower (09) Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension Jump

  11. Windy Point - Siemens Wind Farm | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcat 1 Wind Project Jump to:WilsonIIa extension JumpSiemens Wind Farm

  12. Big Windy Hot Springs Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:EzfeedflagBiomass ConversionsSouth Carolina:EnergyPark, Arizona: Energy ResourcesStone

  13. A New Era for the Big 8? Evidence on the Association Between Earnings Quality and Audit Firm Type

    E-Print Network [OSTI]

    Cassell, Cory A.

    2010-07-14T23:59:59.000Z

    research that fully differentiates audit firm type. My results indicate that the post-Andersen growth of Second-Tier audit firms coincides with improved Second-Tier audit quality, relative to the other audit firm types (Big N and other non-Big N...

  14. Results of the GAP-4 experiment on molten-fuel drainage through intersubassembly gap geometry. [LMFBR

    SciTech Connect (OSTI)

    Spencer, B.W.; Vetter, D.; Wesel, R.; Sienicki, J.J.

    1983-01-01T23:59:59.000Z

    One of the key issues in assessment of the meltout phase of a hypothetical core disruptive accident in the LMFBR system involves the timing and paths for dispersal of molten fuel from the disrupted core. A program of experiments is underway at Argonne National Laboratory to investigate molten fuel penetration through these postulated escape paths. The purpose of the GAP-4 test was to examine the penetration distances of molten fuel flowing through the flat, narrow channels representing the intersubassembly gap geometry. In the experiment design, the gap geometry was selected to be two-dimensional on the basis that the gap volume in a reactor design would be interconnected and continuous. The molten fuel used in these tests was a mixture of UO/sub 2/ (81%) and molybdenum (19%) which was generated by an exothermic thermite reaction at a temperature of approx. 3470 K.

  15. Comparison of GAP-3 and GAP-4 experiments with conduction freezing calculations. [LMFBR

    SciTech Connect (OSTI)

    Sienicki, J.J.; Spencer, B.W.

    1983-01-01T23:59:59.000Z

    Experiments GAP-3 and GAP-4 were performed at ANL to investigate the ability of molten fuel to penetrate downward through the narrow channels separating adjacent subassemblies during an LMFBR hypothetical core disruptive accident. Molten fuel-metal mixtures (81% UO/sub 2/, 19% Mo) at an initial temperature of 3470/sup 0/K generated by a thermite reaction were injected downward into 1 m long rectangular test sections (gap thickness = 0.43 cm, channel width = 20.3 cm) initially at 1170/sup 0/K simulating the nominal Clinch River Breeder Reactor intersubassembly gap. In the GAP-3 test, a prolonged reaction time of approx. 15 s resulted in segregation of the metallic Mo and oxidic UO/sub 2/ constituents within the reaction vessel prior to injection. Consequently, Mo entered the test section first and froze, forming a complete plug at a penetration distance of 0.18 m. In GAP-4, the reaction time was reduced to approx. 3 s and the constituents remained well mixed upon injection with the result that the leading edge penetration distance increased to 0.35 m. Posttest examination of the cut-open test sections has revealed the existence of stable insulating crusts upon the underlying steel walls with melting and ablation of the walls only very localized.

  16. Gap Assessment in the Emergency Response Community

    SciTech Connect (OSTI)

    Barr, Jonathan L.; Burtner, Edwin R.; Pike, William A.; Peddicord, Annie M Boe; Minsk, Brian S.

    2010-09-27T23:59:59.000Z

    This report describes a gap analysis of the emergency response and management (EM) community, performed during the fall of 2009. Pacific Northwest National Laboratory (PNNL) undertook this effort to identify potential improvements to the functional domains in EM that could be provided by the application of current or future technology. To perform this domain-based gap analysis, PNNL personnel interviewed subject matter experts (SMEs) across the EM domain; to make certain that the analyses reflected a representative view of the community, the SMEs were from a variety of geographic areas and from various sized communities (urban, suburban, and rural). PNNL personnel also examined recent and relevant after-action reports and U.S. Government Accountability Office reports.

  17. On fixed-gap adiabatic quantum computation

    E-Print Network [OSTI]

    Ari Mizel

    2014-01-21T23:59:59.000Z

    Quantum computation has revolutionary potential for speeding algorithms and for simulating quantum systems such as molecules. We report here a quantum computer design that performs universal quantum computation within a single non-degenerate ground state protected from decohering noise by an energy gap that we argue is system-size-independent. Closely analogous to a traditional electric circuit, it substantially changes the requirements for quantum computer construction, easing measurement, timing, and heating problems. Using the standard adiabatic condition, we present evidence that this design permits "quantum concurrent processing" distributing a quantum computation among extra qubits to perform a quantum algorithm of N gates in an amount of time that scales with the square root of N. One consequence of our work is a fixed gap version of adiabatic quantum computation, which several arguments hinted could be impossible.

  18. Codoped direct-gap semiconductor scintillators

    DOE Patents [OSTI]

    Derenzo, Stephen Edward (Pinole, CA); Bourret-Courchesne, Edith (Berkeley, CA); Weber, Marvin J. (Danville, CA); Klintenberg, Mattias K. (Berkeley, CA)

    2008-07-29T23:59:59.000Z

    Fast, bright inorganic scintillators at room temperature are based on radiative electron-hole recombination in direct-gap semiconductors, e.g. CdS and ZnO. The direct-gap semiconductor is codoped with two different impurity atoms to convert the semiconductor to a fast, high luminosity scintillator. The codopant scheme is based on dopant band to dopant trap recombination. One dopant provides a significant concentration of carriers of one type (electrons or holes) and the other dopant traps carriers of the other type. Examples include CdS:In,Te; CdS:In,Ag; CdS:In,Na; ZnO:Ga,P; ZnO:Ga,N; ZnO:Ga,S; and GaN:Ge,Mg.

  19. Codoped direct-gap semiconductor scintillators

    DOE Patents [OSTI]

    Derenzo, Stephen E.; Bourret-Courchesne, Edith; Weber, Marvin J.; Klintenberg, Mattias K.

    2006-05-23T23:59:59.000Z

    Fast, bright inorganic scintillators at room temperature are based on radiative electron-hole recombination in direct-gap semiconductors, e.g. CdS and ZnO. The direct-gap semiconductor is codoped with two different impurity atoms to convert the semiconductor to a fast, high luminosity scintillator. The codopant scheme is based on dopant band to dopant trap recombination. One dopant provides a significant concentration of carriers of one type (electrons or holes) and the other dopant traps carriers of the other type. Examples include CdS:In,Te; CdS:In,Ag; CdS:In,Na; ZnO:Ga,P; ZnO:Ga,N; ZnO:Ga,S; and GaN:Ge,Mg.

  20. Fabrication of photonic band gap materials

    DOE Patents [OSTI]

    Constant, Kristen (Ames, IA); Subramania, Ganapathi S. (Ames, IA); Biswas, Rana (Ames, IA); Ho, Kai-Ming (Ames, IA)

    2002-01-15T23:59:59.000Z

    A method for forming a periodic dielectric structure exhibiting photonic band gap effects includes forming a slurry of a nano-crystalline ceramic dielectric or semiconductor material and monodisperse polymer microspheres, depositing a film of the slurry on a substrate, drying the film, and calcining the film to remove the polymer microspheres therefrom. The film may be cold-pressed after drying and prior to calcining. The ceramic dielectric or semiconductor material may be titania, and the polymer microspheres may be polystyrene microspheres.

  1. ISSN 1745-96481 A firm-level panel-data approach to

    E-Print Network [OSTI]

    Feigon, Brooke

    - up and innovation and mobile telecommunications reform (1995-2007) by Yan Li ESRC Centre the relationship between the regulatory reform (including competition, privatization and independent regulator provides robust results, suggesting that mobile sector reforms, in general, improve firms' efficiency

  2. Production Economics Modeling and Analysis of Polluting firms: The Production Frontier Approach

    E-Print Network [OSTI]

    Mekaroonreung, Maethee

    2012-10-19T23:59:59.000Z

    As concern grows about energy and environment issues, energy and environmental modeling and related policy analysis are critical issues for today's society. Polluting firms such as coal power plants play an important role in providing electricity...

  3. Successful Pursuit of Small Electrical and Controls Projects by a Small Civil Engineering Firm

    E-Print Network [OSTI]

    Gates, Craig

    2008-07-25T23:59:59.000Z

    This paper determines how a small, primarily civil engineering firm possessing an electrical and controls group can successfully pursue small electrical and controls projects issued by local electrical generation utilities. Not only...

  4. A theoretical and empirical exploration into the heterogeneous fragility of Chilean firms and workplaces

    E-Print Network [OSTI]

    Landerretche, Oscar

    2006-01-01T23:59:59.000Z

    This dissertation consists of three essays on the heterogeneous reactions of firms to shocks, with particular empirical applications to the Chilean economy. The first essay presents a model of heterogeneity in an economy ...

  5. Intrametropolitan firm clustering : measurement, detection and determinants : case study in Boston

    E-Print Network [OSTI]

    Liao, Xiongjiu

    2011-01-01T23:59:59.000Z

    In this thesis, I attempt to construct a conceptual and computational framework for studying firm clustering at intrametropolitan level. Specifically, this framework includes methods of measuring general industry clustering, ...

  6. Developing a unified manufacturing and sourcing strategy in a multi-business unit engineering firm

    E-Print Network [OSTI]

    Abu-Khalil, Ramy, 1978-

    2005-01-01T23:59:59.000Z

    Competitive pressures in manufacturing industries have led to an increased utilization of outsourcing as a strategic alternative to vertical integration. This thesis develops a methodology to aid multi-business unit firms ...

  7. Mediating regional development : how metalworking firms forged lasting linkages with steel in Ciudad, Guayana, Venezuela

    E-Print Network [OSTI]

    Döhnert, Sylvia, 1970-

    2003-01-01T23:59:59.000Z

    Ever since the late 1950s, planners have lured large firms to lagging regions with the expectation that they will trigger local industrial activity. According to the literatures on unbalanced growth, growth poles, foreign ...

  8. The Effects Of Port Security Compliance On The Competitiveness Of European Union Maritime Industry Firms

    E-Print Network [OSTI]

    Stone, Jonathan Taylor

    2013-02-12T23:59:59.000Z

    ABSTRACT The Effects Of Port Security Compliance On The Competitiveness Of European Union Maritime Industry Firms. (May 2013) Jonathan Stone Department of Maritime Administration Texas A&M University Research Advisor: Dr. Joan Mileski Department...

  9. Do Firms Interact Strategically? A Structural Model of the Multi-Stage Investment Timing Game

    E-Print Network [OSTI]

    Lin, C.-Y. Cynthia

    interactions take place on U.S. federal lands in the Gulf of Mexico. In particular, it analyzes whether a firm, Ariel Pakes, Jack Porter, Juan Robalino, Stephen Ryan, M ichael Springborn, Jam es Stock, Stephen Weinb

  10. How to transition Chinese firms into world-class corporations : organizational and cultural innovations are key

    E-Print Network [OSTI]

    Zhao, Zhongyao (Zhongyao Charls)

    2007-01-01T23:59:59.000Z

    Entering the 21st Century, after almost 30 years development of the Chinese economy, several famous Chinese firms have grown to a significant scale and achieved the rudiments of world-class corporations. Following Japanese ...

  11. Material scarcity from the perspective of manufacturing firms : case studies of platinum and cobalt

    E-Print Network [OSTI]

    Alonso, Elisa (Elisa Yun Han)

    2010-01-01T23:59:59.000Z

    Many agree that materials availability, especially non-renewable materials, is an issue of global concern. However, the implications and strategy options for manufacturing firms are not obvious. Manufacturers select materials ...

  12. Services and the Business Models of Product Firms: An Empirical Analysis of the Software Industry

    E-Print Network [OSTI]

    Suarez, Fernando F.

    Some product firms increasingly rely on service revenues as part of their business models. One possible explanation is that they turn to services to generate additional profits when their product industries mature and ...

  13. What is the value of logistics for a large pharmaceutical firm?

    E-Print Network [OSTI]

    Tiwari, Prasoon, M. Eng. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    Understanding business needs arising out of both, external and internal environments, is an essential first step in determining the value of logistics in a large pharmaceutical firm. In this research, we have used a variety ...

  14. System architecture of a consulting engineering services firm and its application to information system development

    E-Print Network [OSTI]

    Martino, Rachael Eileen Applebee

    Building Information Systems (IS) requires employees to have a clear understanding of not only the daily work of the company, but of value delivery mechanisms throughout the firm. The three major success factors for IS ...

  15. Agent-Based Modeling and Computational Experiments in Industrial Organization: Growing Firms and Industries in silico

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    equilibrium either with or without entry barriers, the actual process of firm entry and exit through which-specific factors affect the out-of-equilibrium processes of entry and exit as well as the long-run equilibrium

  16. The effect of firming agents on quality of parthenocarpic and normal fresh-pack pickles

    E-Print Network [OSTI]

    Longan, Bobby Jeff

    1971-01-01T23:59:59.000Z

    The use of calcium salts as firming agents is widespread in the food industry; however, alum has traditionally been used for this purpose in pickles. The parthenocarpic cucumber, which holds great promise because of improved machine harvesting... characteris- tics, was found to be softer than normal pickles when processed by the usual commercial method. Calcium chloride, calcium lactate, and alum were evaluated as firming agents at five levels each in both parthenocarpic and normal pickles...

  17. Vehicle Codes and Standards: Overview and Gap Analysis

    SciTech Connect (OSTI)

    Blake, C.; Buttner, W.; Rivkin, C.

    2010-02-01T23:59:59.000Z

    This report identifies gaps in vehicle codes and standards and recommends ways to fill the gaps, focusing on six alternative fuels: biodiesel, natural gas, electricity, ethanol, hydrogen, and propane.

  18. Substrate-Induced Band-Gap Opening in Epitaxial Graphene

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

    Substrate-Induced Band-Gap Opening in Epitaxial Graphene Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Wednesday, 26 March 2008 00:00 Prospective challengers to...

  19. Direct band gap narrowing in highly doped Ge

    E-Print Network [OSTI]

    Han, Zhaohong

    Direct band gap narrowing in highly doped n-type Ge is observed through photoluminescence measurements by determining the spectrum peak shift. A linear relationship between the direct band gap emission and carrier concentration ...

  20. Substrate-induced band gap opening in epitaxial graphene

    E-Print Network [OSTI]

    2008-01-01T23:59:59.000Z

    H.A. Electronic states of graphene nanoribbons studied withS.G. Louie. Energy gaps in graphene nanoribbons. Phys. Rev.band-gap engineering of graphene nanoribbons. Phys. Rev.

  1. Minding the Gap Makes for More Efficient Solar Cells

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

    Minding the Gap Makes for More Efficient Solar Cells Minding the Gap Makes for More Efficient Solar Cells Print Thursday, 19 December 2013 11:01 Using novel materials to develop...

  2. Bridging the Efficiency Gap: Commercial Packaged Rooftop Air Conditioners

    E-Print Network [OSTI]

    Bridging the Efficiency Gap: Commercial Packaged Rooftop Air Conditioners John Shugars, Consultant ofcommercialpackaged air conditioners, explore the reasons behindthis efficiency gap, and assess opportunities). Although sales of rooftop air conditioners have steadily increased over the past decade, the efficiency

  3. Turbine blade tip gap reduction system

    DOE Patents [OSTI]

    Diakunchak, Ihor S.

    2012-09-11T23:59:59.000Z

    A turbine blade sealing system for reducing a gap between a tip of a turbine blade and a stationary shroud of a turbine engine. The sealing system includes a plurality of flexible seal strips extending from a pressure side of a turbine blade generally orthogonal to the turbine blade. During operation of the turbine engine, the flexible seal strips flex radially outward extending towards the stationary shroud of the turbine engine, thereby reducing the leakage of air past the turbine blades and increasing the efficiency of the turbine engine.

  4. Closed Gap Enzen | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof EnergyInnovationin UrbanCity ofCityCleanInformation ClimateClio PowerClosed Gap

  5. A Simple Analytical Model for Gaps in Protoplanetary Disks

    E-Print Network [OSTI]

    Duffell, Paul C

    2015-01-01T23:59:59.000Z

    An analytical model is presented for calculating the surface density as a function of radius $\\Sigma(r)$ in protoplanetary disks in which a planet has opened a gap. This model is also applicable to circumbinary disks with extreme binary mass ratios. The gap profile can be solved for algebraically, without performing any numerical integrals. In contrast with previous one-dimensional gap models, this model correctly predicts that low-mass (sub-Jupiter) planets can open gaps in sufficiently low-viscosity disks, and it correctly recovers the power-law dependence of gap depth on planet-to-star mass ratio $q$, disk aspect ratio $h/r$, and dimensionless viscosity $\\alpha$ found in previous numerical studies. Analytical gap profiles are compared with numerical calculations over a range of parameter space in $q$, $h/r$, and $\\alpha$, demonstrating accurate reproduction of the "partial gap" regime, and general agreement over a wide range of parameter space.

  6. On band gaps in photonic crystal fibers

    E-Print Network [OSTI]

    Shane Cooper; Ilia Kamotski; Valery Smyshlyaev

    2014-11-02T23:59:59.000Z

    We consider the Maxwell's system for a periodic array of dielectric `fibers' embedded into a `matrix', with respective electric permittivities $\\epsilon_0$ and $\\epsilon_1$, which serves as a model for cladding in photonic crystal fibers (PCF). The interest is in describing admissible and forbidden (gap) pairs $(\\omega,k)$ of frequencies $\\omega$ and propagation constants $k$ along the fibers, for a Bloch wave solution on the cross-section. We show that, for "pre-critical" values of $k(\\omega)$ i.e. those just below $\\omega (\\min\\{\\epsilon_0,\\epsilon_1\\}\\mu)^{1/2}$ (where $\\mu$ is the magnetic permeability assumed constant for simplicity), the coupling specific to the Maxwell's systems leads to a particular partially degenerating PDE system for the axial components of the electromagnetic field. Its asymptotic analysis allows to derive the limit spectral problem where the fields are constrained in one of the phases by Cauchy-Riemann type relations. We prove related spectral convergence. We finally give some examples, in particular of small size "arrow" fibers ($\\epsilon_0>\\epsilon_1$) where the existence of the gaps near appropriate "micro-resonances" is demonstrated by a further asymptotic analysis.

  7. Extended Supersymmetry in Gapped and Superconducting Graphene

    E-Print Network [OSTI]

    V. K. Oikonomou

    2015-06-27T23:59:59.000Z

    In view of the many quantum field theoretical descriptions of graphene in $2+1$ dimensions, we present another field theoretical feature of graphene, in the presence of defects. Particularly, we shall be interested in gapped graphene in the presence of a domain wall and also for superconducting graphene in the presence of a vortex. As we explicitly demonstrate, the gapped graphene electrons that are localized on the domain wall are associated with four $N=2$ one dimensional supersymmetries, with each pair combining to form an extended $N=4$ supersymmetry with non-trivial topological charges. The case of superconducting graphene is more involved, with the electrons localized on the vortex being associated with $n$ one dimensional supersymmetries, which in turn combine to form an $N=2n$ extended supersymmetry with no-trivial topological charges. As we shall prove, all supersymmetries are unbroken, a feature closely related to the number of the localized fermions and also to the exact form of the associated operators. In addition, the corresponding Witten index is invariant under compact and odd perturbations.

  8. Extended Supersymmetry in Gapped and Superconducting Graphene

    E-Print Network [OSTI]

    V. K. Oikonomou

    2014-11-30T23:59:59.000Z

    In view of the many quantum field theoretical descriptions of graphene in $2+1$ dimensions, we present another field theoretical feature of graphene, in the presence of defects. Particularly, we shall be interested in gapped graphene in the presence of a domain wall and also for superconducting graphene in the presence of a vortex. As we explicitly demonstrate, the gapped graphene electrons that are localized on the domain wall are associated with four $N=2$ one dimensional supersymmetries, with each pair combining to form an extended $N=4$ supersymmetry with non-trivial topological charges. The case of superconducting graphene is more involved, with the electrons localized on the vortex being associated with $n$ one dimensional supersymmetries, which in turn combine to form an $N=2n$ extended supersymmetry with no-trivial topological charges. As we shall prove, all supersymmetries are unbroken, a feature closely related to the number of the localized fermions and also to the exact form of the associated operators. In addition, the corresponding Witten index is invariant under compact and odd perturbations.

  9. Next Generation Nuclear Plant GAP Analysis Report

    SciTech Connect (OSTI)

    Ball, Sydney J [ORNL; Burchell, Timothy D [ORNL; Corwin, William R [ORNL; Fisher, Stephen Eugene [ORNL; Forsberg, Charles W. [Massachusetts Institute of Technology (MIT); Morris, Robert Noel [ORNL; Moses, David Lewis [ORNL

    2008-12-01T23:59:59.000Z

    As a follow-up to the phenomena identification and ranking table (PIRT) studies conducted recently by NRC on next generation nuclear plant (NGNP) safety, a study was conducted to identify the significant 'gaps' between what is needed and what is already available to adequately assess NGNP safety characteristics. The PIRT studies focused on identifying important phenomena affecting NGNP plant behavior, while the gap study gives more attention to off-normal behavior, uncertainties, and event probabilities under both normal operation and postulated accident conditions. Hence, this process also involved incorporating more detailed evaluations of accident sequences and risk assessments. This study considers thermal-fluid and neutronic behavior under both normal and postulated accident conditions, fission product transport (FPT), high-temperature metals, and graphite behavior and their effects on safety. In addition, safety issues related to coupling process heat (hydrogen production) systems to the reactor are addressed, given the limited design information currently available. Recommendations for further study, including analytical methods development and experimental needs, are presented as appropriate in each of these areas.

  10. Quantum confinement in GaP nanoclusters

    SciTech Connect (OSTI)

    Laurich, B.K.; Smith, D.C.; Healy, M.D.

    1994-06-01T23:59:59.000Z

    We have prepared GaP and GaAs nanoclusters from organometallic condensation reactions of E[Si(ChH{sub 3})3]3 (E = P, As) and GaCl{sub 3}. The size of the as synthesized clusters is 10 {Angstrom} to 15 {Angstrom}. Larger clusters of 20 {Angstrom} to 30 {Angstrom} size were obtained by thermal annealing of the as grown material. X-ray diffraction and transmission electron microscopy confirm the high crystalline quality. A lattice contraction of 6.7% could be seen for 10 {Angstrom} sized GaAs clusters. The clusters are nearly spherical in shape. Optical absorption spectra show a distinct line which can be assigned to the fundamental transition of the quantum confined electronic state. The measured blue shift, with respect to the GaP bulk absorption edge is 0.53 eV. As the cluster is smaller than the exciton radius, we can calculate the cluster size from this blue shift and obtain 20.2 {Angstrom}, consistent with the results from X-ray diffraction of 19.5 {Angstrom} for the same sample.

  11. Arc voltage distribution skewness as an indicator of electrode gap during vacuum arc remelting

    DOE Patents [OSTI]

    Williamson, Rodney L. (Albuquerque, NM); Zanner, Frank J. (Sandia Park, NM); Grose, Stephen M. (Glenwood, WV)

    1998-01-01T23:59:59.000Z

    The electrode gap of a VAR is monitored by determining the skewness of a distribution of gap voltage measurements. A decrease in skewness indicates an increase in gap and may be used to control the gap.

  12. Arc voltage distribution skewness as an indicator of electrode gap during vacuum arc remelting

    DOE Patents [OSTI]

    Williamson, R.L.; Zanner, F.J.; Grose, S.M.

    1998-01-13T23:59:59.000Z

    The electrode gap of a VAR is monitored by determining the skewness of a distribution of gap voltage measurements. A decrease in skewness indicates an increase in gap and may be used to control the gap. 4 figs.

  13. This paper focuses on the tension that firms face between the need for resources from partners and the potentially

    E-Print Network [OSTI]

    Prinz, Friedrich B.

    power of entrepreneurial firms in resource mobilization.· A central question in organization and Singh, 1998; Ahuja, 2000; Katila and Mang, 2003). Although the ten- sion between cooperation

  14. Sensitivity Analysis of the Gap Heat Transfer Model in BISON.

    SciTech Connect (OSTI)

    Swiler, Laura Painton; Schmidt, Rodney C.; Williamson, Richard (INL); Perez, Danielle (INL)

    2014-10-01T23:59:59.000Z

    This report summarizes the result of a NEAMS project focused on sensitivity analysis of the heat transfer model in the gap between the fuel rod and the cladding used in the BISON fuel performance code of Idaho National Laboratory. Using the gap heat transfer models in BISON, the sensitivity of the modeling parameters and the associated responses is investigated. The study results in a quantitative assessment of the role of various parameters in the analysis of gap heat transfer in nuclear fuel.

  15. Sandia National Laboratories: projected gap between western U...

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

    projected gap between western U.S. water supply and demand Sandia, the Atlantic Council, and NM Water Resource Research Institute Sponsor Roundtable on Western Water Scarcity On...

  16. Rapidity gaps in jet events at D0

    SciTech Connect (OSTI)

    Abbott, B. [New York Univ., NY (United States); Abolins, M. [Michigan State Univ., East Lansing, MI (United States); Acharya, B.S. [Delhi Univ. (India)] [and others; D0 Collaboration

    1997-07-01T23:59:59.000Z

    Preliminary results from the D0 experiment on jet production with rapidity gaps in p{anti p} collisions are presented. A class of dijet events with a forward rapidity gap is observed at center-of-mass energies {radical}s = 1800 GeV and 630 GeV. The number of events with rapidity gaps at both center-of-mass energies is significantly greater than the expectation from multiplicity fluctuations and is consistent with a hard diffractive process. A class of events with two forward gaps and central dijets is also observed at 1800 GeV. This topology is consistent with hard double pomeron exchange.

  17. alteration print gap: Topics by E-print Network

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

    Elihu, David Morad 2006-01-01 2 Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jrmie Dumas Computer Technologies and Information Sciences Websites Summary:...

  18. acoustic band gaps: Topics by E-print Network

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

    type of phononic crystals manufactured Institute of Physics. DOI: 10.10631.2167794 The propagation of acoustic waves in periodic composite Deymier, Pierre 2 Acoustic band gap...

  19. FAQS Gap Analysis Qualification Card – Fire Protection Engineering

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  20. Substrate-Induced Band-Gap Opening in Epitaxial Graphene

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

    Substrate-Induced Band-Gap Opening in Epitaxial Graphene Print Prospective challengers to silicon, the long-reigning king of semiconductors for computer chips and other electronic...

  1. FAQS Gap Analysis Qualification Card – Nuclear Explosive Safety Study

    Broader source: Energy.gov [DOE]

    Functional Area Qualification Standard Gap Analysis Qualification Cards outline the differences between the last and latest version of the FAQ Standard.

  2. Catalysis by Design: Bridging the Gap between Theory and Experiments...

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

    between Theory and Experiments Catalysis by Design: Bridging the Gap between Theory and Experiments Poster presentation at the 2007 Diesel Engine-Efficiency & Emissions Research...

  3. Catalysis by Design: Bridging the Gap Between Theory and Experiments...

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

    Between Theory and Experiments at Nanoscale Level Catalysis by Design: Bridging the Gap Between Theory and Experiments at Nanoscale Level Studies on a simple platinum-alumina...

  4. MI Gap Clearing Kicker Magnet Design Review

    SciTech Connect (OSTI)

    Jensen, Chris; /Fermilab

    2008-10-01T23:59:59.000Z

    The kicker system requirements were originally conceived for the NOvA project. NOvA is a neutrino experiment located in Minnesota. To achieve the desired neutrino flux several upgrades are required to the accelerator complex. The Recycler will be used as a proton pre-injector for the Main Injector (MI). As the Recycler is the same size as the MI, it is possible to do a single turn fill ({approx}11 {micro}sec), minimizing the proton injection time in the MI cycle and maximizing the protons on target. The Recycler can then be filled with beam while the MI is ramping to extract beam to the target. To do this requires two new transfer lines. The existing Recycler injection line was designed for 10{pi} pbar beams, not the 20{pi} proton beams we anticipate from the Booster. The existing Recycler extraction line allows for proton injection through the MI, while we want direct injection from the Booster. These two lines will be decommissioned. The new injection line from the MI8 line into the Recycler will start at 848 and end with injection kickers at RR104. The new extraction line in the RR30 straight section will start with a new extraction kicker at RR232 and end with new MI injection kickers at MI308. Finally, to reduce beam loss activation in the enclosure, a new gap clearing kicker will be used to extract uncaptured beam created during the slip stack injection process down the existing dump line. It was suggested that the MI could benefit from this type of system immediately. This led to the early installation of the gap clearing system in the MI, followed by moving the system to Recycler during NOvA. The specifications also changed during this process. Initially the rise and fall time requirements were 38 ns and the field stability was {+-}1%. The 38 ns is based on having a gap of 2 RF buckets between injections. (There are 84 RF buckets that can be filled from the Booster for each injection, but 82 would be filled with beam. MI and Recycler contain 588 RF buckets.) A rough cost/benefit analysis showed that increasing the number of empty buckets to 3 decreased the kicker system cost by {approx}30%. This could be done while not extending the running time since this is only a 1% reduction in protons per pulse, hence the rise and fall time are now 57 ns. Additionally, the {+-}1% tolerance would have required a fast correction kicker while {+-}3% could be achieved without this kicker. The loosened tolerance was based on experience on wide band damping systems in the MI. A higher power wideband damping system is a better use of the resources as it can be used to correct for multiple sources of emittance growth. Finally, with the use of this system for MI instead of Recycler, the required strength grew from 1.2 mrad to 1.7 mrad. The final requirements for this kicker are listed.

  5. Business Model Change in Early-Stage Entrepreneurial Firms Facing High Uncertainty BUSINESS MODEL CHANGE IN EARLY-STAGE ENTREPRENEURIAL

    E-Print Network [OSTI]

    Mottram, Nigel

    Business Model Change in Early-Stage Entrepreneurial Firms Facing High Uncertainty 1 BUSINESS MODEL Business School, U.K. Changing business models is inevitable for early-stage entrepreneurial firms striving in elements of business models in a set of eight early-stage university spin-offs. Findings suggest

  6. The effect of a corporate name change related to a change in corporate image upon a firm's stock price

    E-Print Network [OSTI]

    DeFanti, Mark P.

    2009-06-02T23:59:59.000Z

    primary research questions. First, what is the effect of a CNC related to a change in corporate image, as opposed to a change in corporate entity (e.g., acquisition), on a firm’s stock price? Second, what is the effect of a major change versus a minor...

  7. Intertemporal Emissions Trading and Market Power: A Dominant Firm with Competitive Fringe Model

    E-Print Network [OSTI]

    Boyer, Edmond

    1 Intertemporal Emissions Trading and Market Power: A Dominant Firm with Competitive Fringe Model Julien Chevallier1 May 26, 2009 Abstract In international emissions trading schemes such as the Kyoto Protocol and the European Union Emissions Trading Scheme, the suboptimal negotiation of the cap

  8. The American Model of the Multinational Firm and the "New" Multinationals From Emerging

    E-Print Network [OSTI]

    Sharp, Kim

    of multinational enterprise (MNE), characterized by foreign direct investment (FDI) aimed at exploiting firm from emerging, upper-middle-income, or oil-rich countries have followed completely different patterns expansion was reached during the 1950s and '60s, as trade and investment barriers gradually fell around

  9. Joint leverage and maturity choices in real estate firms: The role of the REIT status

    E-Print Network [OSTI]

    Alcock, Jamie T.; Steiner, Eva; Tan, Kelvin J. K.

    2012-05-22T23:59:59.000Z

    KJK (2011) The determinants of debt maturity in australian firms. Ac- counting & Finance DOI 10.1111/j.1467-629X.2010.00397.x, URL http://dx.doi.org/ 10.1111/j.1467-629X.2010.00397.x Alcock J, Glascock JL, Steiner E (2012) Manipulation in u.s. reit...

  10. The value relevance of R&D across profit and loss firms Laurel Franzen *, Suresh Radhakrishnan

    E-Print Network [OSTI]

    Muðan, Uðurhan

    the relation between stock price and R&D expense, earnings (before R&D expense) and book value of equi- tyThe value relevance of R&D across profit and loss firms Laurel Franzen *, Suresh Radhakrishnan School of Management, SM 41, University of Texas at Dallas, Richardson, TX 75083, United States a r t i c

  11. Acquisition and management of technology-based firms in a trading and investment company

    E-Print Network [OSTI]

    Tanaka, Jin, M.B.A. Massachusetts Institute of Technology

    2012-01-01T23:59:59.000Z

    Among several key factors affecting new technology innovation, two important ones that are sometimes disturbed by M&A are long-term p-ans and the commitment of the acquired firm's management team. M&A led by technology ...

  12. Top Management Group Pay Disparities and Subsequent Firm Performance: The Effect of Powerful CEOs

    E-Print Network [OSTI]

    McClelland, Patrick Lyn

    2008-05-21T23:59:59.000Z

    and to move the current debate beyond tournament theoretic explanations by showing that pay disparities within top management groups arise as a function of the distribution of power within them. This study is based on a sample of 604 publicly-traded firms...

  13. USING FIRM OPTIMIZATION TO EVALUATE AND ESTIMATE PRODUCTIVITY AND RETURNS TO SCALE

    E-Print Network [OSTI]

    Sadoulet, Elisabeth

    USING FIRM OPTIMIZATION TO EVALUATE AND ESTIMATE PRODUCTIVITY AND RETURNS TO SCALE Yuriy, not production function. Given this observation, the paper argues that, under weak assumptions, micro profits. The puzzle arises because popular estimators ignore heterogeneity and endogeneity in factor/product

  14. Professional Human Capital Flows: Temporal Structure of Loss, Replacement and Contingent Bundling Effects on Firm Performance

    E-Print Network [OSTI]

    Brymer, Rhett

    2012-10-19T23:59:59.000Z

    to appropriate more value than s/he brings to the new firm (Coff, _______________ This dissertation follows the style of Academy of Management Journal. 2 Pa ge 2 2011; 1999). Despite the evidence that losing and gaining PHC can negatively affect...

  15. SEMIEMPIRICAL MOLECULAR ORBITAL CALCULATIONS OF BAND GAPS OF CONJUGATED POLYMERS

    E-Print Network [OSTI]

    Goddard III, William A.

    SEMI­EMPIRICAL MOLECULAR ORBITAL CALCULATIONS OF BAND GAPS OF CONJUGATED POLYMERS Tahir Cagin Research and Development Center, Materials Labarotory, Polymer Branch, Wright Patterson AFB, Ohio 45433 geometries and energy band gaps of conjugated polymers. In this study, we used a modified version of semi

  16. Organizational resources, industry membership, and firm performance: the role of capability formation and use in value creation for IPO-stage new ventures 

    E-Print Network [OSTI]

    Holcomb, Timothy R.

    2009-06-02T23:59:59.000Z

    A widely held belief is that resource constraints and industry conditions pose severe threats to the performance of entrepreneurial firms. While previous research links resources controlled by these firms to different ...

  17. Organizational resources, industry membership, and firm performance: the role of capability formation and use in value creation for IPO-stage new ventures

    E-Print Network [OSTI]

    Holcomb, Timothy R.

    2009-06-02T23:59:59.000Z

    to this This dissertation follows the style of the Academy of Management Journal. 2 perspective, firms differ in their resource positions, providing a source of performance heterogeneity across firms (Peteraf, 1993). This growing body of work, which is based...

  18. 21600 Federal Register / Vol. 75, No. 79 / Monday, April 26, 2010 / Notices 1 An SME is defined as a firm with 500 or fewer

    E-Print Network [OSTI]

    21600 Federal Register / Vol. 75, No. 79 / Monday, April 26, 2010 / Notices 1 An SME is defined,680 for large firms and $2,925 for a small or medium-sized enterprise (SME) 1 or small organization, which will cover one representative. The fee for each additional firm representative (large firm or SME) is $500

  19. British Academy (e-GAP2) Guide for Applicants The British Academy e-GAP2 applicant guide July 2012 Page 1

    E-Print Network [OSTI]

    British Academy (e-GAP2) Guide for Applicants The British Academy e-GAP2 applicant guide July 2012 Page 1 2012 INTERNAL USER GUIDE A Guide to the British Academy Electronic Submission System (e-GAP2) A Quick Guide for Applicants applying for funding using the e-GAP2 System The British Academy web page

  20. CX-011618: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Kremmling-Windy Gap 138-kilovolt Transmission Line Danger Tree Management CX(s) Applied: B1.3 Date: 11/21/2013 Location(s): Colorado Offices(s): Western Area Power Administration-Rocky Mountain Region

  1. Pairing Gaps, Pseudogaps, and Phase Diagrams for Cuprate Superconductors

    E-Print Network [OSTI]

    Yang Sun; Mike Guidry; Cheng-Li Wu

    2007-02-21T23:59:59.000Z

    We use a symmetry-constrained variational procedure to construct a generalization of BCS to include Cooper pairs with non-zero momentum and angular momentum. The resulting gap equations are solved at zero and finite temperature, and the doping-dependent solutions are used to construct gap and phase diagrams. We find a pseudogap terminating at a critical doping that may be interpreted in terms of both competing order and preformed pairs. The strong similarity between observation and predicted gap and phase structure suggests that this approach may provide a unified description of the complex structure observed for cuprate superconductors.

  2. The structural preconditions for maximizing FDI spillovers in Colombia : a sectoral impact analysis of Foreign Direct Investment (FDI) on Industry output, labor payments, firm productivity, and the productive structure (1995-2009)

    E-Print Network [OSTI]

    Hyman, Benjamin G. (Benjamin Gabriel)

    2011-01-01T23:59:59.000Z

    Do multinational corporations (MNCs) crowd out domestic firms in developing countries, or is foreign direct investment (FDI) complementary to domestic firm profitability, productivity, and employment? Empirical literature ...

  3. Cross-border business challenges: an ethnographic study of small U.S. and Mexican firms

    E-Print Network [OSTI]

    Snider, Rhonda

    1997-01-01T23:59:59.000Z

    VI. CONCLUSIONS . 127 Cultural Frameworks Tested The Challenges to Cross-Border Business . . Further Research Application and Relevance 127 . . . 131 133 136 REFERENCES CITED 138 APPENDIX A: SELECTION OF FIRMS VIA SNOWBALL METHOD . . . 155... challenges to cross-border commerce? To answer these questions, I used both qualitative and quantitative methods in my investi- gation, and placed an emphasis on the applied rather than the theoretical dimensions of anthropology. LITERATURE REVIEW...

  4. Feasibility of band gap engineering of pyrite FeS?

    E-Print Network [OSTI]

    Sun, Ruoshi

    We use first-principles computations to investigate whether the band gap of pyrite FeS? can be increased by alloying in order to make it a more effective photovoltaic material. In addition to the isostructural compounds ...

  5. Topological gap states of semiconducting armchair graphene ribbons

    E-Print Network [OSTI]

    Y. H. Jeong; S. C. Kim; S. -R. Eric Yang

    2015-05-18T23:59:59.000Z

    In semiconducting armchair graphene ribbons a chiral lattice deformation can induce pairs of topological gap states with opposite energies. Near the critical value of the deformation potential these kink and antikink states become almost degenerate with zero energy and have a fractional charge one-half. Such a semiconducting armchair ribbon represents a one-dimensional topological insulator with nearly zero energy end states. Using data collapse of numerical results we find that the shape of the kink displays an anomalous power-law dependence on the width of the local lattice deformation. We suggest that these gap states may be probed in optical measurements. However, "metallic" armchair graphene ribbons with a gap induced by many-electron interactions have no gap states and are not topological insulators.

  6. Gap generation and semimetal-insulator phase transition in graphene

    E-Print Network [OSTI]

    O. V. Gamayun; E. V. Gorbar; V. P. Gusynin

    2009-12-15T23:59:59.000Z

    The gap generation is studied in suspended clean graphene in the continuum model for quasiparticles with the Coulomb interaction. We solve the gap equation with the dynamical polarization function and show that, comparing to the case of the static polarization function, the critical coupling constant lowers to the value \\alpha_c=0.92, which is close to that obtained in lattice Monte Carlo simulations. It is argued that additional short-range four-fermion interactions should be included in the continuum model to account for the lattice simulation results. We obtain the critical line in the plane of electromagnetic and four-fermion coupling constants and find a second order phase transition separating zero gap and gapped phases with critical exponents close to those found in lattice calculations.

  7. Proper Sustainability: GAP Grant Proposal Work Plan Strategy Webinar

    Office of Energy Efficiency and Renewable Energy (EERE)

    In this webinar I will discuss the new GAP grant requirements for tribal environmental programs and strategies for crafting a work plan that focuses on capacity building activities.  My goal is to...

  8. Topological gap states of semiconducting armchair graphene ribbons

    E-Print Network [OSTI]

    Jeong, Y H; Yang, S -R Eric

    2015-01-01T23:59:59.000Z

    In semiconducting armchair graphene ribbons a chiral lattice deformation can induce pairs of topological gap states with opposite energies. Near the critical value of the deformation potential these kink and antikink states become almost degenerate with zero energy and have a fractional charge one-half. Such a semiconducting armchair ribbon represents a one-dimensional topological insulator with nearly zero energy end states. Using data collapse of numerical results we find that the shape of the kink displays an anomalous power-law dependence on the width of the local lattice deformation. We suggest that these gap states may be probed in optical measurements. However, "metallic" armchair graphene ribbons with a gap induced by many-electron interactions have no gap states and are not topological insulators.

  9. Topological gap states of semiconducting armchair graphene ribbons

    E-Print Network [OSTI]

    Y. H. Jeong; S. C. Kim; S. -R. Eric Yang

    2015-05-31T23:59:59.000Z

    In semiconducting armchair graphene ribbons a chiral lattice deformation can induce pairs of topological gap states with opposite energies. Near the critical value of the deformation potential these kink and antikink states become almost degenerate with zero energy and have a fractional charge one-half. Such a semiconducting armchair ribbon represents a one-dimensional topological insulator with nearly zero energy end states. Using data collapse of numerical results we find that the shape of the kink displays an anomalous power-law dependence on the width of the local lattice deformation. We suggest that these gap states may be probed in optical measurements. However, "metallic" armchair graphene ribbons with a gap induced by many-electron interactions have no gap states and are not topological insulators.

  10. Energy gap of Kronig-Penney-type hydrogenated graphene superlattices

    E-Print Network [OSTI]

    Lee, Joo-Hyoung

    The electronic structure of graphene-graphane superlattices with armchair interfaces is investigated with first-principles density-functional theory. By separately varying the widths, we find that the energy gap Eg is ...

  11. Combined Heat and Power: Connecting the Gap between Markets and...

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

    801, Washington, D.C. 20036 (202) 429-8873 phone, (202) 429-2248 fax, http:aceee.org Web site CHP: Connecting the Gap, ACEEE Contents Acknowledgments......

  12. Combined Heat and Power: Connecting the Gap Between Markets and...

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

    there seems to be very little new CHP. Instead, there are a large amount of photovoltaics in operation. Arizona is ideal for 22 CHP: Connecting the Gap (Part II), ACEEE...

  13. Plugging of intersubassembly gaps by downward flowing molten steel. [LMFBR

    SciTech Connect (OSTI)

    Sienicki, J.J.; Spencer, B.W.

    1984-01-01T23:59:59.000Z

    In the assessment of the meltout phase of an LMFBR hypothetical core disruptive accident, a pathway for the escape of molten fuel from the disrupted core is provided by the narrow channels separating adjacent subassemblies. However, the removal of fuel through intersubassembly gaps might be impeded by steel blockage formation, if molten steel is postulated to enter the gap network ahead of disrupted fuel. Reported here are the results of an analysis of the conduction freezing controlled penetration behavior of molten steel flowing downward through the voided (of sodium) gap channels nominally separating adjacent subassemblies below the active core region. The objective is to determine the range of conditions under which the steel is predicted to be deposited as a thin crust on the channel walls leaving an open pathway remaining for subsequent fuel flow instead of forming a complete plug which closes off the gap channel and obstructs fuel removal immediately thereafter.

  14. Perspective The MAHB, the Culture Gap, and Some Really

    E-Print Network [OSTI]

    Ford, James

    is a product of population size, per capita consumption, and the sorts of technologies and social and economic systems that supply the consumption. A vast ``culture gap'' has developed over the past century or so

  15. Vacuum gaps with small tunnel currents at large electric field...

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

    Vacuum gaps with small tunnel currents at large electric field and its potential applications for energy storage, charge storage and power supplies. Friday, May 27, 2011 - 4:00pm...

  16. Bridging conduction and radiation : investigating thermal transport in nanoscale gaps

    E-Print Network [OSTI]

    Chiloyan, Vazrik

    2015-01-01T23:59:59.000Z

    Near field radiation transfer between objects separated by small gaps is a widely studied field in heat transfer and has become more important than ever. Many technologies such as heat assisted magnetic recording, aerogels, ...

  17. Permanent-magnet-less machine having an enclosed air gap

    DOE Patents [OSTI]

    Hsu, John S.

    2013-03-05T23:59:59.000Z

    A permanent magnet-less, brushless synchronous system includes a stator that generates a magnetic rotating field when sourced by an alternating current. An uncluttered rotor disposed within the magnetic rotating field is spaced apart from the stator to form an air gap relative to an axis of rotation. A stationary excitation core spaced apart from the uncluttered rotor by an axial air gap and a radial air gap substantially encloses the stationary excitation core. Some permanent magnet-less, brushless synchronous systems include stator core gaps to reduce axial flux flow. Some permanent magnet-less, brushless synchronous systems include an uncluttered rotor coupled to outer laminations. The quadrature-axis inductance may be increased in some synchronous systems. Some synchronous systems convert energy such as mechanical energy into electrical energy (e.g., a generator); other synchronous systems may convert any form of energy into mechanical energy (e.g., a motor).

  18. Excitonic gap, phase transition, and quantum Hall effect in graphene

    E-Print Network [OSTI]

    V. P. Gusynin; V. A. Miransky; S. G. Sharapov; I. A. Shovkovy

    2006-11-23T23:59:59.000Z

    We suggest that physics underlying the recently observed removal of sublattice and spin degeneracies in graphene in a strong magnetic field describes a phase transition connected with the generation of an excitonic gap. The experimental form of the Hall conductivity is reproduced and the main characteristics of the dynamics are described. Predictions of the behavior of the gap as a function of temperature and a gate voltage are made.

  19. Computation of radiative heat transport across a nanoscale vacuum gap

    SciTech Connect (OSTI)

    Budaev, Bair V., E-mail: bair@berkeley.edu; Bogy, David B., E-mail: dbogy@berkeley.edu [University of California, Etcheverry Hall, MC 1740, Berkeley, California 94720-1740 (United States)

    2014-02-10T23:59:59.000Z

    Radiation heat transport across a vacuum gap between two half-spaces is studied. By consistently applying only the fundamental laws of physics, we obtain an algebraic equation that connects the temperatures of the half-spaces and the heat flux between them. The heat transport coefficient generated by this equation for such structures matches available experimental data for nanoscale and larger gaps without appealing to any additional specific mechanisms of energy transfer.

  20. Hydrogeologic Model for the Gable Gap Area, Hanford Site

    SciTech Connect (OSTI)

    Bjornstad, Bruce N.; Thorne, Paul D.; Williams, Bruce A.; Last, George V.; Thomas, Gregory S.; Thompson, Michael D.; Ludwig, Jami L.; Lanigan, David C.

    2010-09-30T23:59:59.000Z

    Gable Gap is a structural and topographic depression between Gable Mountain and Gable Butte within the central Hanford Site. It has a long and complex geologic history, which includes tectonic uplift synchronous with erosional downcutting associated with the ancestral Columbia River during both Ringold and Cold Creek periods, and by the later Ice Age (mostly glacial Lake Missoula) floods. The gap was subsequently buried and partially backfilled by mostly coarse-grained, Ice Age flood deposits (Hanford formation). Erosional remnants of both the Ringold Formation and Cold Creek unit locally underlie the high-energy flood deposits. A large window exists in the gap where confined basalt aquifers are in contact with the unconfined suprabasalt aquifer. Several paleochannels, of both Hanford and Ringold Formation age, were eroded into the basalt bedrock across Gable Gap. Groundwater from the Central Plateau presently moves through Gable Gap via one or more of these shallow paleochannels. As groundwater levels continue to decline in the region, groundwater flow may eventually be cut off through Gable Gap.

  1. Truth-telling by Third-party Auditors and the Response of Polluting Firms: Experimental Evidence from India

    E-Print Network [OSTI]

    Duflo, Esther

    2013-07-17T23:59:59.000Z

    In many regulated markets, private, third-party auditors are chosen and paid by the firms that they audit, potentially creating a conflict of interest. This paper reports on a two-year field experiment in the Indian state ...

  2. Management of intermediated channels for high technology firms : achieving success in a dynamic and rapidly changing marketplace

    E-Print Network [OSTI]

    Gorsky, John Paul

    2005-01-01T23:59:59.000Z

    One of the most challenging problems for high technology firms in an increasingly global marketplace is the effective utilization of intermediated sales channels. As product development cycles shorten, there can be a ...

  3. Why did they comply while others did not? : environmental compliance of small firms and implications for regulation

    E-Print Network [OSTI]

    Lee, Eungkyoon

    2005-01-01T23:59:59.000Z

    This doctoral dissertation aims to offer new insights into the environmental compliance behavior of small firms (SFs). Specifically, the dissertation examines the impacts of two categories of factors. The first category ...

  4. Adiabatic and nonadiabatic nanofocusing of plasmons by tapered gap plasmon waveguides

    E-Print Network [OSTI]

    Pile, DFP; Gramotnev, D K

    2006-01-01T23:59:59.000Z

    wave vector of the gap plasmon generated by a line sourcean adaptor between two gap plasmon waveguides of the widthslosses for the focused plasmons, because they have to

  5. Integration of MEA Components-Status and Technology Gaps: A Stakeholde...

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

    Integration of MEA Components-Status and Technology Gaps: A Stakeholder's Perspective Integration of MEA Components-Status and Technology Gaps: A Stakeholder's Perspective...

  6. Investigating the book-tax income gap : factors which affect the gap and details regarding its most significant component

    E-Print Network [OSTI]

    Seidman, Jeri

    2008-01-01T23:59:59.000Z

    (cont.) In total, my thesis suggests that recent changes in the book-tax income gap may be exogenous and transitory, due to changes to the calculation of book income, general business conditions or other factors which ...

  7. Influence of gap spacing on the characteristics of Trichel pulse generated in point-to-plane discharge gaps

    SciTech Connect (OSTI)

    Li, Zhen, E-mail: leezhen1988@gmail.com; Zhang, Bo, E-mail: shizbcn@mail.tsinghua.edu.cn; He, Jinliang, E-mail: hejl@tsinghua.edu.cn; Xu, Yongsheng, E-mail: evebus@163.com [State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084 (China)] [State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084 (China)

    2014-01-15T23:59:59.000Z

    In this paper, the specific characteristics of the Trichel pulse generated in wide point-to-plane discharge gaps are investigated and compared with those of the currents generated in narrow gaps. A set of empirical formulas are derived to describe the specific characteristics. The influence of the gap spacing both on the current characteristics and on the coefficients of the formulas is studied. Based on the experiment results, an improvement is made to the space charge calculation method proposed by Lama and Gallo [J. Appl. Phys. 45, 103–113 (1974)] and the calculation results are compared to the ones obtained with Lama and Gallo's original method. With the influence of the space charge considered, the modified method obtains more accurate results of the space charge accumulating in the gap and gives a more precise description of the motion of the space charge in the gap. Based on the calculation results, the influence of the space charge on the distribution of the electric field is examined and the influence of the gap spacing on the current characteristics is also studied.

  8. Impact on asteroseismic analyses of regular gaps in Kepler data

    E-Print Network [OSTI]

    Garc?a, R A; Pires, S; Regulo, C; Bellamy, B; Palle, P L; Ballot, J; Forteza, S Barcelo; Beck, P G; Bedding, T R; Ceillier, T; Cortes, T Roca; Salabert, D; Stello, D

    2014-01-01T23:59:59.000Z

    The NASA Kepler mission has observed more than 190,000 stars in the constellations of Cygnus and Lyra. Around 4 years of almost continuous ultra high-precision photometry have been obtained reaching a duty cycle higher than 90% for many of these stars. However, almost regular gaps due to nominal operations are present in the light curves at different time scales. In this paper we want to highlight the impact of those regular gaps in asteroseismic analyses and we try to find a method that minimizes their effect in the frequency domain. To do so, we isolate the two main time scales of quasi regular gaps in the data. We then interpolate the gaps and we compare the power density spectra of four different stars: two red giants at different stages of their evolution, a young F-type star, and a classical pulsator in the instability strip. The spectra obtained after filling the gaps in the selected solar-like stars show a net reduction in the overall background level, as well as a change in the background parameters....

  9. CV evolution: AM Her binaries and the period gap

    E-Print Network [OSTI]

    R. F. Webbink; D. T. Wickramasinghe

    2002-04-19T23:59:59.000Z

    AM Her variables -- synchronised magnetic cataclysmic variables (CVs) -- exhibit a different period distribution from other CVs across the period gap. We show that non-AM Her systems may infiltrate the longer-period end of the period gap if they are metal-deficient, but that the position and width of the gap in orbital period is otherwise insensitive to other binary parameters (excepting the normalisation of the braking rate). In AM Her binaries, magnetic braking is reduced as the wind from the secondary star may be trapped within the magnetosphere of the white dwarf primary. This reduced braking fills the period gap from its short-period end as the dipole magnetic moment of the white dwarf increases. The consistency of these models with the observed distribution of CVs, both AM Her and non-AM Her type, provides compelling evidence supporting magnetic braking as the agent of angular momentum loss among long-period CVs, and its disruption as the explanation of the 2 - 3 hour period gap among nonmagnetic CVs.

  10. Shared-savings firm goes out of business: PMI users left with unserviced, malfunctioning equipment

    SciTech Connect (OSTI)

    Galvin, C.

    1983-05-23T23:59:59.000Z

    Some customers of Performance Management Inc. (PMI) are left with non-functioning and the possible removal of equipment now that the shared-savings financing firm has gone out of business. PMI's departure from the contracts leaves no service or maintenance funds for the 50 to 100 installations in the field. Officials from most of the equipment manufacturers denied knowledge of PMI, which dealt only with independent installers and customers under a contract that called for users to share energy savings with PMI in exchange for PMI financing for installation and service. (DCK)

  11. Fact Sheet: Wind Firming EnergyFarm (August 2013) | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic Plan| Department of.pdf6-OPAMDepartment6 FY FactWind Firming EnergyFarm (August

  12. Fact Sheet: Wind Firming EnergyFarm (August 2013) | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport in RepresentativeDepartment ofDepartmentLastSodium-BetaDepartment ofWind Firming

  13. 2009 Voluntary Protection Programs Participants' Association (VPPPA) Presentation: Gaps in your Safety Program?

    Broader source: Energy.gov [DOE]

    2009 Voluntary Protection Programs Participants' Association (VPPPA) Presentation: Gaps in your Safety Program?

  14. Giant radiation heat transfer through the micron gaps

    E-Print Network [OSTI]

    Nefedov, Igor

    2011-01-01T23:59:59.000Z

    Near-field heat transfer between two closely spaced radiating media can exceed in orders radiation through the interface of a single black body. This effect is caused by exponentially decaying (evanescent) waves which form the photon tunnel between two transparent boundaries. However, in the mid-infrared range it holds when the gap between two media is as small as few tens of nanometers. We propose a new paradigm of the radiation heat transfer which makes possible the strong photon tunneling for micron thick gaps. For it the air gap between two media should be modified, so that evanescent waves are transformed inside it into propagating ones. This modification is achievable using a metamaterial so that the direct thermal conductance through the metamaterial is practically absent and the photovoltaic conversion of the transferred heat is not altered by the metamaterial.

  15. Finite-temperature lineshapes in gapped quantum spin chains

    E-Print Network [OSTI]

    Fabian H. L. Essler; Robert M. Konik

    2007-12-05T23:59:59.000Z

    We consider the finite-temperature dynamical structure factor (DSF) of gapped quantum spin chains such as the spin one Heisenberg model and the transverse field Ising model in the disordered phase. At zero temperature the DSF in these models is dominated by a delta-function line arising from the coherent propagation of single particle modes. Using methods of integrable quantum field theory we determine the evolution of the lineshape at low temperatures. We show that the line shape is in general asymmetric in energy and becomes Lorentzian only at temperatures far below the gap. We discuss the relevance of our results for the analysis of inelastic neutron scattering experiments on gapped spin chain systems such as CsNiCl_3 and YBaNiO_5.

  16. Prebreakdown and breakdown phenomena in large oil gaps under AC

    SciTech Connect (OSTI)

    Saker, A.; Gournay, P.; Lesaint, O.; Tobazeon, R. [CNRS, Grenoble (France). Lab. d`Electrostatique et de Materiaux Dielectriques; Trinh, N.G. [Inst. de Recherche d`Hydro-Quebec, Varennes, Quebec (Canada); Boisdon, C. [Jeumont-Schneider Transformateurs, Lyon (France)

    1996-12-31T23:59:59.000Z

    This paper presents a study of prebreakdown and breakdown phenomena under AC voltage in mineral oil in large gaps to 60 cm. The investigations presented concern the study of streamers and the measurement of breakdown voltages in rod-plane and sphere-plane gaps. Also, the influence of a contamination by solid particles in the oil has been considered. A specific breakdown mode under AC voltage is evidenced, where bursts of streamers lead to the lowest breakdown fields recorded. Numerical values of the mean field in oil required for direct or burst breakdown modes are derived from the experiments. As a consequence, the great sensitivity to the presence of particles on EHV transformers insulation with large oil gaps is pointed out.

  17. Band gap engineering strategy via polarization rotation in perovskite ferroelectrics

    SciTech Connect (OSTI)

    Wang, Fenggong, E-mail: fenggong@sas.upenn.edu; Grinberg, Ilya; Rappe, Andrew M., E-mail: rappe@sas.upenn.edu [The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104–6323 (United States)

    2014-04-14T23:59:59.000Z

    We propose a strategy to engineer the band gaps of perovskite oxide ferroelectrics, supported by first principles calculations. We find that the band gaps of perovskites can be substantially reduced by as much as 1.2?eV through local rhombohedral-to-tetragonal structural transition. Furthermore, the strong polarization of the rhombohedral perovskite is largely preserved by its tetragonal counterpart. The B-cation off-center displacements and the resulting enhancement of the antibonding character in the conduction band give rise to the wider band gaps of the rhombohedral perovskites. The correlation between the structure, polarization orientation, and electronic structure lays a good foundation for understanding the physics of more complex perovskite solid solutions and provides a route for the design of photovoltaic perovskite ferroelectrics.

  18. Band gap engineering at a semiconductor - crystalline oxide interface

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

    Moghadam, Jahangir-Moghadam; Shen, Xuan; Chrysler, Matthew; Ahmadi-Majlan, Kamyar; Su, Dong; Ngai, Joseph H.

    2015-03-01T23:59:59.000Z

    The epitaxial growth of crystalline oxides on semiconductors provides a pathway to introduce new functionalities to semiconductor devices. Key to integrating the functionalities of oxides onto semiconductors is controlling the band alignment at interfaces between the two materials. Here we apply principles of band gap engineering traditionally used at heterojunctions between conventional semiconductors to control the band offset between a single crystalline oxide and a semiconductor. Reactive molecular beam epitaxy is used to realize atomically abrupt and structurally coherent interfaces between SrZrxTi1-xO? and Ge, in which the band gap of the former is enhanced with Zr content x. We presentmore »structural and electrical characterization of SrZrxTi1-xO?-Ge heterojunctions and demonstrate a type-I band offset can be achieved. These results demonstrate that band gap engineering can be exploited to realize functional semiconductor crystalline oxide heterojunctions.« less

  19. NGNP Project Regulatory Gap Analysis for Modular HTGRs

    SciTech Connect (OSTI)

    Wayne Moe

    2011-09-01T23:59:59.000Z

    The Next Generation Nuclear Plant (NGNP) Project Regulatory Gap Analysis (RGA) for High Temperature Gas-Cooled Reactors (HTGR) was conducted to evaluate existing regulatory requirements and guidance against the design characteristics specific to a generic modular HTGR. This final report presents results and identifies regulatory gaps concerning current Nuclear Regulatory Commission (NRC) licensing requirements that apply to the modular HTGR design concept. This report contains appendices that highlight important HTGR licensing issues that were found during the RGA study. The information contained in this report will be used to further efforts in reconciling HTGR-related gaps in the NRC licensing structure, which has to date largely focused on light water reactor technology.

  20. Vortex and gap generation in gauge models of graphene

    E-Print Network [OSTI]

    O. Oliveira; C. E. Cordeiro; A. Delfino; W. de Paula; T. Frederico

    2011-04-22T23:59:59.000Z

    Effective quantum field theoretical continuum models for graphene are investigated. The models include a complex scalar field and a vector gauge field. Different gauge theories are considered and their gap patterns for the scalar, vector, and fermion excitations are investigated. Different gauge groups lead to different relations between the gaps, which can be used to experimentally distinguish the gauge theories. In this class of models the fermionic gap is a dynamic quantity. The finite-energy vortex solutions of the gauge models have the flux of the "magnetic field" quantized, making the Bohm-Aharonov effect active even when external electromagnetic fields are absent. The flux comes proportional to the scalar field angular momentum quantum number. The zero modes of the Dirac equation show that the gauge models considered here are compatible with fractionalization.

  1. Narrow gap welding with the hot wire GTA process

    SciTech Connect (OSTI)

    Cook, G.E.; Levick, P.C.

    1985-08-01T23:59:59.000Z

    Narrow gap welding offers the promise of dramatically improved weld completion rates and reduced heat input for welding of butt joints in materials of 10 mm (0.4 in.) section thickness and larger. Techniques for successful welding of narrow gap joint preparations have been discussed in the literature for approximately twenty years, with the majority of these based on the consumable electrode processes. Gas tungsten arc welding with cold wire filler addition has been shown to be capable of narrow gap welding although limited deposition rate capability has not made this a competitive alternative. The GTAW process offers the advantages of superior penetration control for one-sided welding of butt joints, as well as the potential for reducing incomplete fusion defects. The addition of hot wire filler metal to the gas tungsten arc provides an attractive alternative that combines high deposition rate capability and independent control of heat input.

  2. The gender gap on concept inventories in physics: what is consistent, what is inconsistent, and what factors influence the gap?

    E-Print Network [OSTI]

    Madsen, Adrian; Sayre, Eleanor C

    2013-01-01T23:59:59.000Z

    We review the literature on the gender gap on concept inventories in physics. Across studies, men consistently score higher on pre-tests of the Force Concept Inventory (FCI) and Force and Motion Conceptual Evaluation (FMCE) by about 10%, and in most cases score higher on post-tests as well, also by about 10%. The average difference in normalized gain is about 6%. This difference is much smaller than the average difference in normalized gain between traditional lecture and interactive engagement (25%), but is large enough that it could impact the results of studies comparing the effectiveness of different teaching methods. Based on our analysis of 24 published articles comparing the impact of 34 factors that could potentially influence the gender gap, no single factor is sufficient to explain the gap. Several high-profile studies that have claimed to account for or reduce the gender gap have failed to be replicated, suggesting that isolated claims of explanations of the gender gap should be interpreted with ca...

  3. The role of the energy gap in protein folding dynamics

    E-Print Network [OSTI]

    Estelle Pitard; Henri Orland

    1998-11-17T23:59:59.000Z

    The dynamics of folding of proteins is studied by means of a phenomenological master equation. The energy distribution is taken as a truncated exponential for the misfolded states plus a native state sitting below the continuum. The influence of the gap on the folding dynamics is studied, for various models of the transition probabilities between the different states of the protein. We show that for certain models, the relaxation to the native state is accelerated by increasing the gap, whereas for others it is slowed down .

  4. Special purpose modes in photonic band gap fibers

    DOE Patents [OSTI]

    Spencer, James; Noble, Robert; Campbell, Sara

    2013-04-02T23:59:59.000Z

    Photonic band gap fibers are described having one or more defects suitable for the acceleration of electrons or other charged particles. Methods and devices are described for exciting special purpose modes in the defects including laser coupling schemes as well as various fiber designs and components for facilitating excitation of desired modes. Results are also presented showing effects on modes due to modes in other defects within the fiber and due to the proximity of defects to the fiber edge. Techniques and devices are described for controlling electrons within the defect(s). Various applications for electrons or other energetic charged particles produced by such photonic band gap fibers are also described.

  5. Bridging the Gap between Crisis Response Operations and Systems

    E-Print Network [OSTI]

    Khalil, Khaled M; Nazmy, Taymour T; Salem, Abdel-Badeeh M

    2009-01-01T23:59:59.000Z

    There exist huge problems in the current practice of crisis response operations. Response problems are projected as a combination of failure in communication, failure in technology, failure in methodology, failure of management, and finally failure of observation. In this paper we compare eight crisis response systems namely: DrillSim [2, 13], DEFACTO [12, 17], ALADDIN [1, 6], RoboCup Rescue [11, 15], FireGrid [3, 8, 18], WIPER [16], D-AESOP [4], and PLAN C [14]. Comparison results will disclose the cause of failure of current crisis response operations (the response gap). Based on comparison results; we provide recommendations for bridging this gap between response operations and systems.

  6. Rapidity gap survival in the black-disk regime

    SciTech Connect (OSTI)

    Leonid Frankfurt; Charles Hyde; Mark Strikman; Christian Weiss

    2007-04-16T23:59:59.000Z

    We summarize how the approach to the black-disk regime (BDR) of strong interactions at TeV energies influences rapidity gap survival in exclusive hard diffraction pp -> p + H + p (H = dijet, Qbar Q, Higgs). Employing a recently developed partonic description of such processes, we discuss (a) the suppression of diffraction at small impact parameters by soft spectator interactions in the BDR; (b) further suppression by inelastic interactions of hard spectator partons in the BDR; (c) correlations between hard and soft interactions. Hard spectator interactions substantially reduce the rapidity gap survival probability at LHC energies compared to previously reported estimates.

  7. Multi-gap high impedance plasma opening switch

    DOE Patents [OSTI]

    Mason, R.J.

    1996-10-22T23:59:59.000Z

    A high impedance plasma opening switch having an anode and a cathode and at least one additional electrode placed between the anode and cathode is disclosed. The presence of the additional electrodes leads to the creation of additional plasma gaps which are in series, increasing the net impedance of the switch. An equivalent effect can be obtained by using two or more conventional plasma switches with their plasma gaps wired in series. Higher impedance switches can provide high current and voltage to higher impedance loads such as plasma radiation sources. 12 figs.

  8. Multi-gap high impedance plasma opening switch

    DOE Patents [OSTI]

    Mason, Rodney J. (Los Alamos, NM)

    1996-01-01T23:59:59.000Z

    A high impedance plasma opening switch having an anode and a cathode and at least one additional electrode placed between the anode and cathode. The presence of the additional electrodes leads to the creation of additional plasma gaps which are in series, increasing the net impedance of the switch. An equivalent effect can be obtained by using two or more conventional plasma switches with their plasma gaps wired in series. Higher impedance switches can provide high current and voltage to higher impedance loads such as plasma radiation sources.

  9. GaN0.011P0.989–GaP Double-Heterostructure Red Light-Emitting Diodes Directly Grown on GaP Substrates

    E-Print Network [OSTI]

    Tu, Charles W

    2000-01-01T23:59:59.000Z

    and C. W. Tu, GaN diodes on GaP substrates, 2000. [7] J. W.on a GaN directly grown on a GaP substrate was successfullyDH) directly a GaN grown on a (100) GaP substrate. Fig. 1(a)

  10. New Embolization Microcoil Consisting of Firm and Flexible Segments: Preliminary Clinical Experience

    SciTech Connect (OSTI)

    Irie, Toshiyuki [Hitachi General Hospital, Department of Radiology (Japan)], E-mail: toshiyuki.irie@ibabyo.hitachi.co.jp

    2006-12-15T23:59:59.000Z

    Purpose. To describe the preliminary clinical experience with a new embolization microcoil. Methods. The microcoil was made of a platinum coil spring, and consisted of firm and flexible segments. The firm segment functioned as an anchor and the flexible segment was well compacted to occlude the arteries. No Dacron fiber was attached. Seventy-one new microcoils were placed via microcatheters in 28 visceral arteries of 17 patients. Two other types of microcoils with Dacron fibers were used together in 8 arteries. Results. Sixty-nine new microcoils were placed and compacted successfully. Two coils were misplaced; one was retrieved and the other was left in the migrated artery, which remained patent 5 months later. All 28 arteries were occluded, and the goals of intervention were achieved successfully in all 17 cases. Conclusion. The new microcoils anchored and compacted well in the arteries. The clinical feasibility of this coil design was confirmed. The additional use of other types of microcoils with Dacron fiber was necessary to obtain rapid occlusion in some cases.

  11. Thermal resistance gaps for solid breeder blankets using packed beds

    SciTech Connect (OSTI)

    Gorbis, Z.R.; Raffray, A.R.; Tillack, M.S.; Abdou, M.A.

    1989-03-01T23:59:59.000Z

    The main design features of a new concept for solid breeder blanket thermal resistance gaps are described and analysis is shown for the blanket thermal characteristics. The effective thermal conductivity of a helium-beryllium packed bed configuration is studied, including the effect of a purge stream. Possible applications of this concept to ITER blanket designs are stressed.

  12. mctau: Bridging the Gap between Modest and UPPAAL

    E-Print Network [OSTI]

    David, Alexandre

    mctau: Bridging the Gap between Modest and UPPAAL Jonathan Bogdoll2 , Alexandre David1 , Arnd Saarland University ­ Computer Science, Saarbrücken, Germany Abstract. Modest is a high-level compositional of Modest is to make use of existing analysis techniques and tools in a single-formalism, multiple- solution

  13. The CSU Graduation Initiative Closing the Achievement Gap

    E-Print Network [OSTI]

    Su, Xiao

    Graduation Initiative is part of the nationwide Access to Success project of the National Association to Graduation 7 #12;Tracking and Reporting Consistent evaluation of project results is a critical componentThe CSU Graduation Initiative Closing the Achievement Gap Executive Vice Chancellor Jeri Echeverria

  14. "Charter and Code" Gap Analysis ANALYSIS FOR NORWAY

    E-Print Network [OSTI]

    Johansen, Tom Henning

    "Charter and Code" ­ Gap Analysis ANALYSIS FOR NORWAY The European Charter for Researchers: Acceptable. The principle of research freedom is well-established in Norway. The committee refers for Research Ethics in Norway. #12;In recent years, issues of research ethics have received increasing

  15. Topology of Local Health Officials' Advice Networks: Mind the Gaps

    E-Print Network [OSTI]

    Sadeh, Norman M.

    , evidence-based programs, and service delivery, and health care reform are innovations Author AffiliationsTopology of Local Health Officials' Advice Networks: Mind the Gaps Jacqueline Merrill, RN, MPH: To determine how a health officials' advice network might contribute to a high-performing public health systems

  16. Finding and Mending Barrier Gaps in Wireless Sensor Networks

    E-Print Network [OSTI]

    Liu, Benyuan

    Finding and Mending Barrier Gaps in Wireless Sensor Networks Anwar Saipulla Benyuan Liu Jie Wang--Constructing sensing barriers using wireless sensor networks has important applications in military operations results show that our algorithms can effectively improve the barrier coverage of a wireless sensor network

  17. Development of Low Energy Gap and Fully Regioregular Polythienylenevinylene Derivative

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

    David, Tanya M. S.; Zhang, Cheng; Sun, Sam-Shajing

    2014-01-01T23:59:59.000Z

    Low energy gap and fully regioregular conjugated polymers find its wide use in solar energy conversion applications. This paper will first briefly review this type of polymers and also report synthesis and characterization of a specific example new polymer, a low energy gap, fully regioregular, terminal functionalized, and processable conjugated polymer poly-(3-dodecyloxy-2,5-thienylene vinylene) or PDDTV. The polymer exhibited an optical energy gap of 1.46?eV based on the UV-vis-NIR absorption spectrum. The electrochemically measured highest occupied molecular orbital (HOMO) level is ?4.79?eV, resulting in the lowest unoccupied molecular orbital (LUMO) level of ?3.33?eV based on optical energy gap. The polymer wasmore »synthesized via Horner-Emmons condensation and is fairly soluble in common organic solvents such as tetrahydrofuran and chloroform with gentle heating. DSC showed two endothermic peaks at 67°C and 227°C that can be attributed to transitions between crystalline and liquid states. The polymer is thermally stable up to about 300°C. This polymer appears very promising for cost-effective solar cell applications.« less

  18. Template strand scrunching during DNA gap repair synthesis by human polymerase [lamda

    SciTech Connect (OSTI)

    Garcia-Diaz, Miguel; Bebenek, Katarzyna; Larrea, Andres A.; Havener, Jody M.; Perera, Lalith; Krahn, Joseph M.; Pedersen, Lars C.; Ramsden, Dale A.; Kunkel, Thomas A.; (NIH); (UNC)

    2009-09-25T23:59:59.000Z

    Family X polymerases such as DNA polymerase {lambda}(Pol {lambda}) are well suited for filling short gaps during DNA repair because they simultaneously bind both the 5{prime} and 3{prime} ends of short gaps. DNA binding and gap filling are well characterized for 1-nucleotide (nt) gaps, but the location of yet-to-be-copied template nucleotides in longer gaps is unknown. Here we present crystal structures revealing that, when bound to a 2-nt gap, Pol {lambda} scrunches the template strand and binds the additional uncopied template base in an extrahelical position within a binding pocket that comprises three conserved amino acids. Replacing these amino acids with alanine results in less processive gap filling and less efficient NHEJ when 2-nt gaps are involved. Thus, akin to scrunching by RNA polymerase during transcription initiation, scrunching occurs during gap filling DNA synthesis associated with DNA repair.

  19. Smoothness of the Gap Function in the BCS-Bogoliubov Theory of Superconductivity

    E-Print Network [OSTI]

    Shuji Watanabe

    2010-06-07T23:59:59.000Z

    We deal with the gap equation in the BCS-Bogoliubov theory of superconductivity, where the gap function is a function of the temperature $T$ only. We show that the squared gap function is of class $C^2$ on the closed interval $[\\,0,\\,T_c\\,]$. Here, $T_c$ stands for the transition temperature. Furthermore, we show that the gap function is monotonically decreasing on $[0,\\,T_c]$ and obtain the behavior of the gap function at $T=T_c$. We mathematically point out some more properties of the gap function.

  20. Valley pair qubits in double quantum dots of gapped graphene

    E-Print Network [OSTI]

    G. Y. Wu; N. -Y. Lue; L. Chang

    2011-07-03T23:59:59.000Z

    The rise of graphene opens a new door to qubit implementation, as discussed in the recent proposal of valley pair qubits in double quantum dots of gapped graphene (Wu et al., arXiv: 1104.0443 [cond-mat.mes-hall]). The work here presents the comprehensive theory underlying the proposal. It discusses the interaction of electrons with external magnetic and electric fields in such structures. Specifically, it examines a strong, unique mechanism, i.e., the analogue of the 1st-order relativistic effect in gapped graphene. This mechanism is state mixing free and allows, together with the electrically tunable exchange coupling, a fast, all-electric manipulation of qubits via electric gates, in the time scale of ns. The work also looks into the issue of fault tolerance in a typical case, yielding at 10oK a long qubit coherence time (~O(ms)).

  1. The imaginary part of the gap function in color superconductivity

    E-Print Network [OSTI]

    Bo Feng; Defu Hou; Jiarong Li; Hai-cang Ren

    2006-09-16T23:59:59.000Z

    We clarify general properties of the energy gap regarding its functional dependence on the energy-momentum dictated by the invariance under a space inversion or a time reversal. Then we derive perturbatively the equation of the imaginary part of the gap function for dense QCD in weak coupling and generalize our results from 2SC case to CFL case. We confirm that the imaginary part is down by $g$ relative to the real part in weak coupling. The numerical results show that, up to the leading order, the imaginary part is no larger than one MeV at extremely large densities and can be as large as several MeV the densities are of physical interest.

  2. Air-Gap Convection in a Switched Reluctance Machine

    E-Print Network [OSTI]

    Romanazzi, Pietro

    2015-01-01T23:59:59.000Z

    Switched reluctance machines (SRMs) have recently become popular in the automotive market as they are a good alternative to the permanent magnet machines commonly employed for an electric powertrain. Lumped parameter thermal networks are usually used for thermal analysis of motors due to their low computational cost and relatively accurate results. A critical aspect to be modelled is the rotor-stator air-gap heat transfer, and this is particularly challenging in an SRM due to the salient pole geometry. This work presents firstly a review of the literature including the most relevant correlations for this geometry, and secondly, numerical CFD simulations of air-gap heat transfer for a typical configuration. A new correlation has been derived: $\\mathbf{Nu=0.181\\ Ta_m^{0.207}}$

  3. Axionic superconductivity in three dimensional doped narrow gap semiconductors

    E-Print Network [OSTI]

    Pallab Goswami; Bitan Roy

    2014-08-07T23:59:59.000Z

    We consider the competition between the conventional s-wave and the triplet Balian-Werthamer or the B-phase pairings in the doped three dimensional narrow gap semiconductors, such as $\\mathrm{Cu}_x\\mathrm{Bi}_2\\mathrm{Se}_3$ and $\\mathrm{Sn}_{1-x}\\mathrm{In}_x\\mathrm{Te}$. When the coupling constants of the two contending channels are comparable, we find a simultaneously time-reversal and parity violating $p + is$ state at low temperatures, which provides an example of dynamic axionic state of matter. In contradistinction to the time-reversal invariant, topological B-phase, the $p + is$ state possesses gapped Majorana fermions as the surface Andreev bound states, which give rise to an anomalous surface thermal Hall effect. The anomalous gravitational and electrodynamic responses of the $p+is$ state can be described by the $\\theta$ vacuum structure, where $\\theta \

  4. Entanglement vs. gap for one-dimensional spin systems

    SciTech Connect (OSTI)

    Hastings, Matthew [Los Alamos National Laboratory; Aharonov, Dorit [HEBREW UNIV; Gottesman, Daniel [PERIMETER INSTITUTE

    2008-01-01T23:59:59.000Z

    We study the relationship between entanglement and spectral gap for local Hamiltonians in one dimension. The area law for a one-dimensional system states that for the ground state, the entanglement of any interval is upper-bounded by a constant independent of the size of the interval. However, the possible dependence of the upper bound on the spectral gap {Delta} is not known, as the best known general upper bound is asymptotically much larger than the largest possible entropy of any model system previously constructed for small {Delta}. To help resolve this asymptotic behavior, we construct a family of one-dimensional local systems for which some intervals have entanglement entropy which is polynomial in 1/{Delta}, whereas previously studied systems had the entropy of all intervals bounded by a constant times log(1/{Delta}).

  5. An investigation on reliable passivation of GaP

    E-Print Network [OSTI]

    Greaves King, Carlos A.

    1983-01-01T23:59:59.000Z

    reports the results of a study of sputtered Silicon Nitride 3N4) and Anodic Oxide as passivating techniques for Gallium Phosphide. Anodic Oxide was grown on GaP by anodizing the semiconductor in 30% hydrogen peroxide. The resulting oxide had an index... is therefore needed to prevent degradation due to contamination and charge motion on the surface of the semiconductor [1] . Traditional thermal oxidation techniques used in silicon passivation involves oxidation in high temperature furnaces like the one...

  6. Bridge Health Insurance Options ief gap in health

    E-Print Network [OSTI]

    limitations to bear in mind: n denied health care coverage, you almost certainly won't qualify y at the end-800-304-0372 www.anthem.com and click on visitor and click on state. United Health Care at 1-888-545-5205 or visitBridge Health Insurance Options ief gap in health of coverage became seriously hurt or ill. That

  7. Implications of mercury interactions with band-gap semiconductor oxides

    SciTech Connect (OSTI)

    Granite, E.J.; King, W.P.; Stanko, D.C.; Pennline, H.W.

    2008-09-01T23:59:59.000Z

    Titanium dioxide is a well-known photooxidation catalyst. It will oxidize mercury in the presence of ultraviolet light from the sun and oxygen and/or moisture to form mercuric oxide. Several companies manufacture self-cleaning windows. These windows have a transparent coating of titanium dioxide. The titanium dioxide is capable of destroying organic contaminants in air in the presence of ultraviolet light from the sun, thereby keeping the windows clean. The commercially available self-cleaning windows were used to sequester mercury from oxygen–nitrogen mixtures. Samples of the self-cleaning glass were placed into specially designed photo-reactors in order to study the removal of elemental mercury from oxygen–nitrogen mixtures resembling air. The possibility of removing mercury from ambient air with a self-cleaning glass apparatus is examined. The intensity of 365-nm ultraviolet light was similar to the natural intensity from sunlight in the Pittsburgh region. Passive removal of mercury from the air may represent an option in lieu of, or in addition to, point source clean-up at combustion facilities. There are several common band-gap semiconductor oxide photocatalysts. Sunlight (both the ultraviolet and visible light components) and band-gap semiconductor particles may have a small impact on the global cycle of mercury in the environment. The potential environmental consequences of mercury interactions with band-gap semiconductor oxides are discussed. Heterogeneous photooxidation might impact the global transport of elemental mercury emanating from flue gases.

  8. Sell-in versus Sell-through Revenue Recognition: An Examination of Firm Characteristics and Financial Information Quality

    E-Print Network [OSTI]

    Rasmussen, Stephanie Jean Binger

    2010-10-12T23:59:59.000Z

    equipment industries that use either the sell-in method or the sell-through method. I find that firms with higher growth opportunities and strong corporate governance are less likely to use the sell-in method. In addition, corporate governance strength...

  9. Journal of Economic Behavior & Organization 68 (2008) 125139 A naturalistic approach to the theory of the firm: The role of

    E-Print Network [OSTI]

    Richerson, Peter J.

    2008-01-01T23:59:59.000Z

    Journal of Economic Behavior & Organization 68 (2008) 125­139 A naturalistic approach to the theory firms exist, this paper argues, is because they are suitable organizations within which cooperative of different kinds of organizations. Modern organizations have functions rather different from ancient tribes

  10. Grammatically-guided resolution of filler-gap dependencies: An investigation of Chinese multiple dependencies

    E-Print Network [OSTI]

    Liu, Jie

    2014-08-31T23:59:59.000Z

    Previous studies have provided evidence that the parser avoids positing gaps in grammatically unlicensed positions such as islands, suggesting that the grammar constrains the construction of filler-gap dependencies (e.g., Stowe, 1986). However...

  11. Controlling electrode gap during vacuum arc remelting at low melting current

    DOE Patents [OSTI]

    Williamson, R.L.; Zanner, F.J.; Grose, S.M.

    1997-04-15T23:59:59.000Z

    An apparatus and method are disclosed for controlling electrode gap in a vacuum arc remelting furnace, particularly at low melting currents. Spectrographic analysis is performed of the metal vapor plasma, from which estimates of electrode gap are derived. 5 figs.

  12. Controlling electrode gap during vacuum arc remelting at low melting current

    DOE Patents [OSTI]

    Williamson, Rodney L. (Albuquerque, NM); Zanner, Frank J. (Sandia Park, NM); Grose, Stephen M. (Glenwood, WV)

    1997-01-01T23:59:59.000Z

    An apparatus and method for controlling electrode gap in a vacuum arc remelting furnace, particularly at low melting currents. Spectrographic analysis is performed of the metal vapor plasma, from which estimates of electrode gap are derived.

  13. Hydraulically controlled magnetic bougienage for correction of long-gap esophageal atresia

    E-Print Network [OSTI]

    Noh, Minkyun

    2014-01-01T23:59:59.000Z

    About one in 4000 babies in the United States is born with their esophageal disconnected and separated by a gap, which is called esophageal atresia. Esophageal atresia with a relatively short gap can be directly corrected ...

  14. An optical gap calibration applied to the case of hydrogenated amorphous silicon

    SciTech Connect (OSTI)

    Sweenor, D.E.; O'Leary, S.K.; Foutz, B.E.

    1999-07-01T23:59:59.000Z

    There are many different empirical means whereby the optical gap of an amorphous semiconductor may be defined. They analyze some hydrogenated amorphous silicon data with respect to a number of these empirical measures for the optical gap. By plotting these various gap measures as a function of the breadth of the optical absorption tail, they provide a means of relating these disparate measures of the optical gap. The applicability of this calibration to another set of hydrogenated amorphous silicon data is investigated.

  15. Penetration of plasma into the wafer-focus ring gap in capacitively coupled plasmas

    E-Print Network [OSTI]

    Kushner, Mark

    Penetration of plasma into the wafer-focus ring gap in capacitively coupled plasmas Natalia Y of capacitively coupled plasma reactors with a wafer-focus ring gap. The penetration of plasma generated species i.e., ions and radicals into the wafer-focus ring gap is discussed. We found that the penetration of plasma

  16. Erratum to ``How should gaps be treated in parsimony? A comparison of approaches using simulation"

    E-Print Network [OSTI]

    Rosenberg, Michael S.

    Erratum Erratum to ``How should gaps be treated in parsimony? A comparison of approaches using)]. The three comparisons for treating gaps as unknown, fifth state character, and Simple Indel Coding are shownTrueTree TAA Fig. 3. Moving average lines of treating gaps as unknown, fifth state, and Simple Indel Coding

  17. OIKOS 101: 499504, 2003 Do seedlings in gaps interact? A field test of assumptions in ESS

    E-Print Network [OSTI]

    Silvertown, Jonathan

    OIKOS 101: 499­504, 2003 Do seedlings in gaps interact? A field test of assumptions in ESS seed seedlings in gaps interact? A field test of assumptions in ESS seed size models. ­ Oikos 101: 499­504. ESS for the occupancy of `safe sites' or vegetation gaps. If mortality rates are high and/or frequency-independent, ESS

  18. An Abelian Ward identity and the vertex corrections to the color superconducting gap

    E-Print Network [OSTI]

    Hao-jie Xu; Qun Wang

    2008-10-13T23:59:59.000Z

    We derive an Abelian-like Ward identity in color superconducting phase and calculate vertex corrections to the color superconducting gap. Making use of the Ward identity, we show that subleading order contributions to the gap from vertices are absent for gapped excitations.

  19. Low-pressure spark gap triggered by an ion diode

    DOE Patents [OSTI]

    Prono, D.S.

    1982-08-31T23:59:59.000Z

    Spark gap apparatus for use as an electric switch operating at high voltage, high current and high repetition rate. Mounted inside a housing are an anode, cathode and ion plate. An ionizable fluid is pumped through the chamber of the housing. A pulse of current to the ion plate causes ions to be emitted by the ion plate, which ions move into and ionize the fluid. Electric current supplied to the anode discharges through the ionized fluid and flows to the cathode. Current stops flowing when the current source has been drained. The ionized fluid recombines into its initial dielectric ionizable state. The switch is now open and ready for another cycle.

  20. Low pressure spark gap triggered by an ion diode

    DOE Patents [OSTI]

    Prono, Daniel S. (Livermore, CA)

    1985-01-01T23:59:59.000Z

    Spark gap apparatus for use as an electric switch operating at high voltage, high current and high repetition rate. Mounted inside a housing are an anode, cathode and ion plate. An ionizable fluid is pumped through the chamber of the housing. A pulse of current to the ion plate causes ions to be emitted by the ion plate, which ions move into and ionize the fluid. Electric current supplied to the anode discharges through the ionized fluid and flows to the cathode. Current stops flowing when the current source has been drained. The ionized fluid recombines into its initial dielectric ionizable state. The switch is now open and ready for another cycle.

  1. Relations as patterns: bridging the gap between OBO and OWL

    E-Print Network [OSTI]

    Hoehndorf, Robert; Oellrich, Anika; Dumontier, Michel; Kelso, Janet; Rebholz-Schuhmann, Dietrich; Herre, Heinrich

    2010-08-31T23:59:59.000Z

    METHODOLOGY ARTICLE Open Access Relations as patterns: bridging the gap between OBO and OWL Robert Hoehndorf1,5*, Anika Oellrich1, Michel Dumontier4, Janet Kelso3, Dietrich Rebholz-Schuhmann1, Heinrich Herre2 Abstract Background: Most biomedical... . Genome Biol 2005, 6(5). 8. Horridge M, Drummond N, Goodwin J, Rector A, Stevens R, Wang H: The Manchester OWL Syntax. Proc of the 2006 OWL Experiences and Directions Workshop (OWL-ED2006) 2006. 9. Hoehndorf R, Loebe F, Kelso J, Herre H: Representing...

  2. Fermi velocity renormalization and dynamical gap generation in graphene

    E-Print Network [OSTI]

    C. Popovici; C. S. Fischer; L. von Smekal

    2015-01-12T23:59:59.000Z

    We study the renormalization of the Fermi velocity by the long-range Coulomb interactions between the charge carriers in the Dirac-cone approximation for the effective low-energy description of the electronic excitations in graphene at half filling. Solving the coupled system of Dyson-Schwinger equations for the dressing functions in the corresponding fermion propagator with various approximations for the particle-hole polarization we observe that Fermi velocity renormalization effects generally lead to a considerable increase of the critical coupling for dynamical gap generation and charge-density wave formation at the semimetal-insulator transition.

  3. GAPS Power Infrastructure Pvt Ltd | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are8COaBulkTransmissionSitingProcess.pdf Jump1946865°, -86.0529604°Wisconsin:FyreStorm Inc JumpGAD (Smart GridGAPS

  4. U. S. S. R. E and P woes create opportunities for service firms

    SciTech Connect (OSTI)

    Deffavges, E.H.; Moeller, R.C.; Tveat, J.E. (Booz, Allen and Hamilton, San Francisco, CA (US))

    1990-09-24T23:59:59.000Z

    This paper discusses how many oil field service and supply (OFSS) firms now have the opportunity to enter the Soviet Union. Their technology can help reverse production declines in existing fields and improve long-term prospects for newly discovered reverses. The Soviet Union is in the throes of its third oil crisis in 15 years. The U.S.S.R.'s first oil crisis was triggered by the unexpected decline of production from the Volga fields in 1977. Its second crisis was set off when West Siberian production faltered in 1985-1988, combined with a fall in oil prices which reduced the hard currency earnings needed to pay for imports of Western technology. In the past, rapid shifts of internal investment funds into the oil sector and selected imports of critical Western oil field technology saved the day. Today, the situation requires a fundamental change because only a massive influx of Western capital, experience, services, and technology offers any hope of reversing the latest decline in Soviet oil production, which began in 1988.

  5. Hanford Waste Physical and Rheological Properties: Data and Gaps

    SciTech Connect (OSTI)

    Kurath, Dean E.; Wells, Beric E.; Huckaby, James L.; Mahoney, Lenna A.; Daniel, Richard C.; Burns, Carolyn A.; Tingey, Joel M.; Cooley, Scott K.

    2012-03-01T23:59:59.000Z

    The retrieval, transport, treatment and disposal operations associated with Hanford Tank Wastes involve the handling of a wide range of slurries. Knowledge of the physical and rheological properties of the waste is a key component to the success of the design and implementation of the waste processing facilities. Previous efforts to compile and analyze the physical and rheological properties were updated with new results including information on solids composition and density, particle size distributions, slurry rheology, and particle settling behavior. The primary source of additional data is from a recent series of tests sponsored by the Hanford Waste Treatment and Immobilization Plant. These tests involved an extensive suite of characterization and bench-scale process testing of 8 waste groups representing approximately 75% of the high-level waste mass expected to be processed through the WTP. Additional information on the morphology of the waste solids was also included. Based on the updated results, a gap analysis to identify gaps in characterization data, analytical methods and data interpretation was completed.

  6. Hanford Waste Physical and Rheological Properties: Data and Gaps - 12078

    SciTech Connect (OSTI)

    Kurath, D.E.; Wells, B.E.; Huckaby, J.L.; Mahoney, L.A.; Daniel, R.C.; Burns, C.A.; Tingey, J.M.; Cooley, S.K. [Pacific Northwest National Laboratory PO Box 999, Richland WA 99352 (United States)

    2012-07-01T23:59:59.000Z

    The retrieval, transport, treatment and disposal operations associated with Hanford Tank Wastes involve the handling of a wide range of slurries. Knowledge of the physical and rheological properties of the waste is a key component to the success of the design and implementation of the waste processing facilities. Previous efforts to compile and analyze the physical and rheological properties were updated with new results including information on solids composition and density, particle size distributions, slurry rheology, and particle settling behavior. The primary source of additional data is from a recent series of tests sponsored by the Hanford Waste Treatment and Immobilization Plant (WTP). These tests involved an extensive suite of characterization and bench-scale process testing of 8 waste groups representing approximately 75% of the high-level waste mass expected to be processed through the WTP. Additional information on the morphology of the waste solids was also included. Based on the updated results, a gap analysis to identify gaps in characterization data, analytical methods and data interpretation was completed. (authors)

  7. Transport band gap opening at metal–organic interfaces

    SciTech Connect (OSTI)

    Haidu, Francisc, E-mail: francisc.haidu@physik.tu-chemnitz.de; Salvan, Georgeta; Zahn, Dietrich R. T. [Semiconductor Physics, Technische Universität Chemnitz, D-09107 Chemnitz (Germany); Smykalla, Lars; Hietschold, Michael [Solid Surfaces Analysis, Technische Universität Chemnitz, D-09107 Chemnitz (Germany); Knupfer, Martin [Electronic and Optical Properties Department, IFW Dresden, D-01171 Dresden (Germany)

    2014-07-01T23:59:59.000Z

    The interface formation between copper phthalocyanine (CuPc) and two representative metal substrates, i.e., Au and Co, was investigated by the combination of ultraviolet photoelectron spectroscopy and inverse photoelectron spectroscopy. The occupied and unoccupied molecular orbitals and thus the transport band gap of CuPc are highly influenced by film thickness, i.e., molecule substrate distance. Due to the image charge potential given by the metallic substrates the transport band gap of CuPc “opens” from (1.4?±?0.3) eV for 1?nm thickness to (2.2?±?0.3) eV, and saturates at this value above 10?nm CuPc thickness. The interface dipoles with values of 1.2?eV and 1.0?eV for Au and Co substrates, respectively, predominantly depend on the metal substrate work functions. X-ray photoelectron spectroscopy measurements using synchrotron radiation provide detailed information on the interaction between CuPc and the two metal substrates. While charge transfer from the Au or Co substrate to the Cu metal center is present only at sub-monolayer coverages, the authors observe a net charge transfer from the molecule to the Co substrate for films in the nm range. Consequently, the Fermi level is shifted as in the case of a p-type doping of the molecule. This is, however, a competing phenomenon to the energy band shifts due to the image charge potential.

  8. Mass Flow and Accretion through gaps in Accretion Discs

    E-Print Network [OSTI]

    Willy Kley

    1998-09-21T23:59:59.000Z

    We study the structure and dynamics of the gap created by a protoplanet in an accretion disc. The hydrodynamic equations for a flat, two-dimensional, non-selfgravitating protostellar accretion disc with an embedded, Jupiter sized protoplanet on a circular orbit are solved. To simulate possible accretion of mass onto the protoplanet we continually remove mass from the interior of the planet's Roche lobe which is monitored. Firstly, it is shown that consistent results independent on numerical issues (such as boundary or initial conditions, artificial viscosity or resolution) can be obtained. Then, a detailed parameter study delineates the influence of the disc viscosity and pressure on the magnitude of the accretion rate. We find that, even after the formation of a gap in the disc, the planet is still able to accrete more mass from the disc. This accretion occurs from regions of the disc which are radially exterior and interior to the planet's orbital radius. The rate depends on the magnitude of the viscosity and vertical thickness of the disc. For a disc viscosity alpha=10^{-3} and vertical thickness H/r=0.05 we estimate the time scale for the accumulation of one Jupiter mass to be of order hundred thousand years. For a larger(smaller) viscosity and disc thickness this accretion rate is increasing(decreasing). For a very small viscosity (alpha disc.

  9. The controversy over the concept of profit maximization in the theory of the firm in the period 1930-1950

    E-Print Network [OSTI]

    Dudley, Bobby George

    1966-01-01T23:59:59.000Z

    was explicitly developed by Edgeworth and Narshall. Alfred Nsrshail's smst explicit statements relative to the actions of ti * ot ill hi ~Pi il I Dt ply. Nsrshail developed a theory of equilibrium around hia theory of the firm. He used the terms industry... knowledge of anthropology, psychology& and the biological sciences~ gave him perspective. Having received hia doctorate in philosophy, he had specie) equip- ment for theoretical discussion and the relat1on of eco nomics to other fields of knowledge. He...

  10. Numerical and experimental design of three-electrode spark gap for synthetic test circuits

    SciTech Connect (OSTI)

    Osmokrovic, P.; Lazarevic, Z.; Kusic, D. (Buleva Revolucije 73, Belgrade (Yugoslavia). Faculty of Electrical Engineering); Arsic, N. (Suncani Breg bb, Pristina (Yugoslavia). Faculty of Electrical Engineering)

    1994-07-01T23:59:59.000Z

    The development of a three-electrode spark gap used with synthetic circuit is considered in this paper. Two types of three-electrode gas insulated spark gaps have been tested: a spark gap with a third electrode being inside the main electrode, and a spark gap with a separate third electrode. Both types of spark gaps were theoretically sized in the optimal way. Several characteristics are determined experimentally: (1) the influence of the gas insulation parameters on the spark gap functioning, (2) the influence of the working and triggering voltages polarities on the spark gap functioning, (3) the influence of the triggering voltage rate-of-rise on the spark gap functioning and (4) the degree of spark gap erosion vs number of operations. Three types of gases were applied: SF6 gas, N2 gas and mixture of 60% SF6 with 40% N2. Also, three electrode materials were used: copper, steel and tungsten. The spark gap switching time and delay time are measured. The statistical analysis of results is presented.

  11. Method of Controlling Corona Effects and Breakdown Voltage of Small Air Gaps Stressed by Impulse Voltages

    E-Print Network [OSTI]

    Athanasios Maglaras; Trifon Kousiouris; Frangiskos Topalis; Dimitrios Katsaros; Leandros A. Maglaras; Konstantina Giannakopoulou

    2014-10-15T23:59:59.000Z

    This paper investigates the influence of a resistor on the dielectric behavior of an air gap. The resistor is connected in series with the air gap and the latter is stressed by impulse voltage. Air gap arrangements of different geometry with either the rod or the plate grounded are stressed with impulse voltages of both positive and negative polarity. The resistor is connected in series with the air gap in the return circuit connecting the gap with the impulse generator. The method followed involves the investigation of the graphs of the charging time concerning the air gaps capacitances, in connection to the value of the resistor, the geometry of the gap, the effect of grounding and the polarity effect. It is determined that the charging time of the air gap increases, as the value of the resistor increases. It is also determined that the peak voltage value of the fully charged air gap decreases as the value of the resistor increases. The results of the mathematical and simulation analysis are compared with the results of the oscillograms taken from experimental work. In addition and consequently to the above results it is concluded from the experimental work that the in series connection of the resistor in the circuit has significant influence on corona pulses (partial discharges) occurring in the gap and on the breakdown voltage of the gap. A new method of controlling the corona effects and consequently the breakdown voltage of small air gaps stressed by impulse voltage of short duration in connection to the ground effect and the polarity effect has arisen. Furthermore through mathematical analysis of the charging graphs obtained from simulation and experimental oscillograms there was a calculation of the values of the capacitance of the air gaps in relation to their geometry and the results were compared to the values calculated with mathematical analysis.

  12. Survey of commercial firms with mixed-waste treatability study capability

    SciTech Connect (OSTI)

    McFee, J.; McNeel, K.; Eaton, D. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States); Kimmel, R. [Dept. of Energy, Idaho Falls, ID (United States). Idaho Operations Office

    1996-04-01T23:59:59.000Z

    According to the data developed for the Proposed Site Treatment Plans, the US Department of Energy (DOE) mixed low-level and mixed transuranic waste inventory was estimated at 230,000 m{sup 3} and embodied in approximately 2,000 waste streams. Many of these streams are unique and may require new technologies to facilitate compliance with Resource Conservation and Recovery Act disposal requirements. Because most waste streams are unique, a demonstration of the selected technologies is justified. Evaluation of commercially available or innovative technologies in a treatability study is a cost-effective method of providing a demonstration of the technology and supporting decisions on technology selection. This paper summarizes a document being prepared by the Mixed Waste Focus Area of the DOE Office of Science and Technology (EM-50). The document will provide DOE waste managers with a list of commercial firms (and universities) that have mixed-waste treatability study capabilities and with the specifics regarding the technologies available at those facilities. In addition, the document will provide a short summary of key points of the relevant regulations affecting treatability studies and will compile recommendations for successfully conducting an off-site treatability study. Interim results of the supplier survey are tabulated in this paper. The tabulation demonstrates that treatment technologies in 17 of the US Environmental Protection Agency`s technology categories are available at commercial facilities. These technologies include straightforward application of standard technologies, such as pyrolysis, as well as proprietary technologies developed specifically for mixed waste. The paper also discusses the key points of the management of commercial mixed-waste treatability studies.

  13. The Effect of Branding and Firm Size on the Recurrence of Food Recall Events Associated with Pathogenic Contamination in the United States

    E-Print Network [OSTI]

    Kapilakanchana, Montalee

    2012-07-16T23:59:59.000Z

    an econometric model with discrete choice modeling approaches: logit and probit. There are two main hypotheses. Firstly, it is hypothesized that branding decreases the likelihood of the occurrence of the repeated recall event. Secondly, size of the firm...

  14. 1602 Federal Register / Vol. 76, No. 7 / Tuesday, January 11, 2011 / Notices * An SME is defined as a firm with 500 or fewer

    E-Print Network [OSTI]

    1602 Federal Register / Vol. 76, No. 7 / Tuesday, January 11, 2011 / Notices * An SME is defined,000 for large firms and $2,000 for a small or medium-sized enterprise (SME),* with up to two company

  15. A research team is developing tools based on the theory of complex systems to analyze the structure and behavior of firms in a non-intrusive, objective, and

    E-Print Network [OSTI]

    Ottino, Julio M.

    and behavior of firms in a non-intrusive, objective, and quantitative way. NORTHWESTERN CHEMICAL AND BIOLOGICAL reveal how people interact and allow mapping of the informal network in a non-intrusive, objective

  16. Voltage-matched, monolithic, multi-band-gap devices

    SciTech Connect (OSTI)

    Wanlass, Mark W.; Mascarenhas, Angelo

    2006-08-22T23:59:59.000Z

    Monolithic, tandem, photonic cells include at least a first semiconductor layer and a second semiconductor layer, wherein each semiconductor layer includes an n-type region, a p-type region, and a given band-gap energy. Formed within each semiconductor layer is a sting of electrically connected photonic sub-cells. By carefully selecting the numbers of photonic sub-cells in the first and second layer photonic sub-cell string(s), and by carefully selecting the manner in which the sub-cells in a first and second layer photonic sub-cell string(s) are electrically connected, each of the first and second layer sub-cell strings may be made to achieve one or more substantially identical electrical characteristics.

  17. Annular gap solitons in Kerr media with circular gratings

    SciTech Connect (OSTI)

    Scheuer, Jacob [School of Electrical Engineering, Tel-Aviv University, Tel Aviv 69978 (Israel); Center for Nanoscience and Nanotechnology, Tel-Aviv University, Tel Aviv 69978 (Israel); Malomed, Boris [School of Electrical Engineering, Tel-Aviv University, Tel Aviv 69978 (Israel)

    2007-06-15T23:59:59.000Z

    We introduce standing-light patterns trapped in a Bragg grating written along the radial direction in a self-focusing (SF) or self-defocusing (SDF) optical medium. Unlike previously studied axisymmetric settings that deal with the axial propagation, we consider the propagation of light in the radial directions (outward and inward), which may give rise to annular gap solitons (AGSs), supported by the circular grating. An estimate for the threshold of the modulational instability of the AGS against azimuthal perturbations in the SF medium is obtained analytically, and verified by direct simulations. In the SDF model, stable annular and dipole solitons are found in a numerical form, while multipole patterns and vortex rings are unstable. Similar solitons are possible in the Bose-Einstein condensate.

  18. Voltage-Matched, Monolithic, Multi-Band-Gap Devices

    DOE Patents [OSTI]

    Wanlass, M. W.; Mascarenhas, A.

    2006-08-22T23:59:59.000Z

    Monolithic, tandem, photonic cells include at least a first semiconductor layer and a second semiconductor layer, wherein each semiconductor layer includes an n-type region, a p-type region, and a given band-gap energy. Formed within each semiconductor layer is a string of electrically connected photonic sub-cells. By carefully selecting the numbers of photonic sub-cells in the first and second layer photonic sub-cell string(s), and by carefully selecting the manner in which the sub-cells in a first and second layer photonic sub-cell string(s) are electrically connected, each of the first and second layer sub-cell strings may be made to achieve one or more substantially identical electrical characteristics.

  19. Mind the Gap: Supersymmetry Breaking in Scaling, Microstate Geometries

    E-Print Network [OSTI]

    Orestis Vasilakis; Nicholas P. Warner

    2011-06-30T23:59:59.000Z

    We use a multi-species supertube solution to construct an example of a scaling microstate geometry for non-BPS black rings in five dimensions. We obtain the asymptotic charges of the microstate geometry and show how the solution is related to the corresponding non-BPS black ring. The supersymmetry is broken in a very controlled manner using holonomy and this enables a close comparison with a scaling, BPS microstate geometry. Requiring that there are no closed time-like curves near the supertubes places additional restrictions on the moduli space of physical, non-BPS solutions when compared to their BPS analogs. For large holonomy the scaling non-BPS solution always has closed time-like curves while for smaller holonomy there is a "gap" in the non-BPS moduli space relative to the BPS counterpart.

  20. Thermal performance simulation of a solar cavity receiver under windy conditions

    SciTech Connect (OSTI)

    Fang, J.B.; Wei, J.J.; Dong, X.W.; Wang, Y.S. [State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049 (China)

    2011-01-15T23:59:59.000Z

    Solar cavity receiver plays a dominant role in the light-heat conversion. Its performance can directly affect the efficiency of the whole power generation system. A combined calculation method for evaluating the thermal performance of the solar cavity receiver is raised in this paper. This method couples the Monte-Carlo method, the correlations of the flow boiling heat transfer, and the calculation of air flow field. And this method can ultimately figure out the surface heat flux inside the cavity, the wall temperature of the boiling tubes, and the heat loss of the solar receiver with an iterative solution. With this method, the thermal performance of a solar cavity receiver, a saturated steam receiver, is simulated under different wind environments. The highest wall temperature of the boiling tubes is about 150 C higher than the water saturation temperature. And it appears in the upper middle parts of the absorbing panels. Changing the wind angle or velocity can obviously affect the air velocity inside the receiver. The air velocity reaches the maximum value when the wind comes from the side of the receiver (flow angle {alpha} = 90 ). The heat loss of the solar cavity receiver also reaches a maximum for the side-on wind. (author)

  1. Gap symmetries from the neighbor coupling in square-lattice superconductors

    E-Print Network [OSTI]

    W. Liming

    2009-11-17T23:59:59.000Z

    The gap symmetries of superconductivity are studied in this work. It is found that the gap symmetries are simply determined by the 4-fold rotational symmetries of the coupling potential on neighbor sites. A local on-site coupling potential results in the on-site pairing with the conventional s-wave symmetry, but a coupling potential between the nearest neighbors or the next-nearest neighbors results in the pairing on neighbor sites with the $s^-$, $d_{x^2-y^2}$, $d_{xy}$, or $s_{x^2y^2}$ gap symmetries. It is proved that both isotropic and anisotropic gap functions are allowed by the 4-fold rotational symmetries of the coupling potential. Finally a numerical computation is performed to demonstrate the gap symmetries. This neighbor coupling provides a unified picture for the gap functions of the conventional and the high Tc superconductivity.

  2. Single-junction solar cells with the optimum band gap for terrestrial concentrator applications

    DOE Patents [OSTI]

    Wanlass, Mark W. (Golden, CO)

    1994-01-01T23:59:59.000Z

    A single-junction solar cell having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of "pinning" the optimum band gap for a wide range of operating conditions at a value of 1.14.+-.0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap.

  3. Surface Plasmon Band Gap Sensor A new sensor for robust on-field biosensing (SEN 1)

    E-Print Network [OSTI]

    Arnaud Benahmed; Robert Lam; Chih-Ming Ho

    2006-01-01T23:59:59.000Z

    Networked Sensing Surface Plasmon Band Gap Sensor A newsensing concept Nanostructures for Surface Plasmon SensingSurface Plasmon are surface EM waves whose wavelength is

  4. Stationary Fuel Cell Application Codes and Standards: Overview and Gap Analysis

    SciTech Connect (OSTI)

    Blake, C. W.; Rivkin, C. H.

    2010-09-01T23:59:59.000Z

    This report provides an overview of codes and standards related to stationary fuel cell applications and identifies gaps and resolutions associated with relative codes and standards.

  5. Influence of film thickness and air exposure on the transport gap of manganese phthalocyanine

    SciTech Connect (OSTI)

    Haidu, F.; Fechner, A.; Salvan, G.; Gordan, O. D.; Fronk, M.; Zahn, D. R. T. [Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz (Germany); Lehmann, D. [Semiconductor Physics, Chemnitz University of Technology, D-09107 Chemnitz (Germany); INNOVENT Technology Development, D-07745 Jena (Germany); Mahns, B.; Knupfer, M. [Electronic and Optical Properties Department, IFW Dresden, D-01171 Dresden (Germany)

    2013-06-15T23:59:59.000Z

    The interface formation between manganese phthalocyanine (MnPc) and cobalt was investigated combining ultraviolet photoelectron spectroscopy and inverse photoelectron spectroscopy. The transport band gap of the MnPc increases with the film thickness up to a value of (1.2 {+-} 0.3) eV while the optical band gap as determined from spectroscopic ellipsometry amounts to 0.5 eV. The gap values are smaller compared to other phthalocyanines due to metallic Mn 3d states close to the Fermi level. The transport band gap was found to open upon air exposure as a result of the disappearance of the occupied 3d electronic states.

  6. Gap generation in Weyl semimetals in a model with local four-fermion interaction

    E-Print Network [OSTI]

    P. O. Sukhachov

    2014-06-25T23:59:59.000Z

    We study the gap generation in Weyl semimetals in a model with local four-fermion interaction. It is shown that there exists a critical value of coupling constant separating the symmetric and broken symmetry phases, and the corresponding phase diagram is described. The gap generation in a more general class of Weyl materials with small bare gap is studied, and the quasiparticle energy spectrum is determined. It is found that, in this case, the dynamically generated gap leads to additional splitting of the quasiparticle energy bands.

  7. PHYSICAL REVIEW B 90, 115209 (2014) Computational search for direct band gap silicon crystals

    E-Print Network [OSTI]

    Lee, Jooyoung

    2014-01-01T23:59:59.000Z

    of microns thick, while solar cells made from direct band gap materials (such as CdTe, CIGS, or CZTS) can

  8. CIVIL-MILITARY GAP AND MILITARY EFFECTIVENESS: THE IMPACT OF IDEOLOGY AND MILITARY EXPERIENCE GAP ON DEFENSE SPENDING IN THE UNITED STATES, 1952-2000

    E-Print Network [OSTI]

    Lee, Byeonggu

    2010-01-01T23:59:59.000Z

    Previous studies of civil-military gap have argued that the difference in values, perspectives, and opinions between civilians and the military matters because it determines military effectiveness, but empirical analyses ...

  9. Genetic-Algorithm Discovery of a Direct-Gap and Optically Allowed Superstructure from Indirect-Gap Si and Ge Semiconductors

    SciTech Connect (OSTI)

    d'Avezac, M.; Luo, J. W.; Chanier, T.; Zunger, A.

    2012-01-13T23:59:59.000Z

    Combining two indirect-gap materials - with different electronic and optical gaps - to create a direct gap material represents an ongoing theoretical challenge with potentially rewarding practical implications, such as optoelectronics integration on a single wafer. We provide an unexpected solution to this classic problem, by spatially melding two indirect-gap materials (Si and Ge) into one strongly dipole-allowed direct-gap material. We leverage a combination of genetic algorithms with a pseudopotential Hamiltonian to search through the astronomic number of variants of Si{sub n}/Ge{sub m}/.../Si{sub p}/Ge{sub q} superstructures grown on (001) Si{sub 1-x}Ge{sub x}. The search reveals a robust configurational motif - SiGe{sub 2}Si{sub 2}Ge{sub 2}SiGe{sub n} on (001) Si{sub x}Ge{sub 1-x} substrate (x {le} 0.4) presenting a direct and dipole-allowed gap resulting from an enhanced {Gamma}-X coupling at the band edges.

  10. Evaluation of architectural paradigms for addressing theprocessor-memory gap

    SciTech Connect (OSTI)

    Oliker, Leonid; Gorden, Grime; Husbands, Parry; Chame, Jacqualine

    2003-07-04T23:59:59.000Z

    Many high performance applications run well below the peak arithmetic performance of the underlying machine, with inefficiencies often attributed to poor memory system behavior. In the context of scientific computing we examine three emerging processors designed to address the well-known gap between processor and memory performance through the exploitation of data parallelism. The VIRAM architecture uses novel PIM technology to combine embedded DRAM with a vector co-processor for exploiting its large bandwidth potential. The DIVA architecture incorporates a collection of PIM chips as smart-memory coprocessors to a conventional microprocessor, and relies on superword-level parallelism to make effective use of the available memory bandwidth. The Imagine architecture provides a stream-aware memory hierarchy to support the tremendous processing potential of SIMD controlled VLIW clusters. First we develop a scalable synthetic probe that allows us to parametize key performance attributes of VIRAM, DIVA and Imagine while capturing the performance crossover points of these architectures. Next we present results for scientific kernels with different sets of computational characteristics and memory access patterns. Our experiments allow us to evaluate the strategies employed to exploit data parallelism, isolate the set of application characteristics best suited to each architecture and show a promising direction towards interfacing leading-edge processor technology with high-end scientific computations.

  11. Bridging the Gap Between BusinessBridging the Gap Between BusinessBridging the Gap Between BusinessBridging the Gap Between Business Process Models and ServiceProcess Models and ServiceProcess Models and ServiceProcess Models and Service

    E-Print Network [OSTI]

    Ulm, Universität

    Bridging the Gap Between Business Process Models and ServiceProcess Models and ServiceProcess Models and Service of the major reasons for this deficiency is the gap that exists between business process models on the one hand a flexible approach for aligning business process models with workflow specifications. In order to maintain

  12. An evaluation of fusion energy R&D gaps using Technology Readiness Levels

    E-Print Network [OSTI]

    for prioritization. #12;The topic of fusion energy R&D gaps is receiving increased attention page 2 of 16 In EUAn evaluation of fusion energy R&D gaps using Technology Readiness Levels M. S. Tillack to develop and apply this technology assessment approach to fusion energy are reported here. #12;We adopted

  13. Thermoelectric power measurements of wide band gap semiconducting Chul-Ho Lee,1

    E-Print Network [OSTI]

    Kim, Philip

    Thermoelectric power measurements of wide band gap semiconducting nanowires Chul-Ho Lee,1 Gyu online 13 January 2009 We investigated the temperature-dependent thermoelectric power TEP of individual concentration in wide band gap semiconducting nano- wires employing temperature-dependent thermoelectric power

  14. Nonperiodicity of the flow within the gap of a thermoacoustic couple at high amplitudes

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Nonperiodicity of the flow within the gap of a thermoacoustic couple at high amplitudes Arganthaël arganthael.berson@ec-lyon.fr, philippe.blanc-benon@ec-lyon.fr Abstract: The flow inside a thermoacoustic at high driving amplitudes. Development of vortices is also observed within the gap of a thermoacoustic

  15. Beam dynamics of a double-gap acceleration cell for ion implantation with multiple atomic species

    SciTech Connect (OSTI)

    Wadlinger, E.A.; Lysenko, W.P.; Rusnak, B. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Saadatmand, K. [Eaton Corporation, Semiconductor Equipment Operation, 108 Cherry Hill Drive, Beverly, Massachusetts 01915 (United States)

    1997-02-01T23:59:59.000Z

    As a result of our work on ion implantation, we derived equations for the beam dynamics of a two-gap-resonator cavity for accelerating and bunching various ion species of varying energies with the cavity designed for one particular ion species of a given energy (the design-reference particle). A two gap structure is useful at low resonant frequencies where lumped circuit elements (inductors) can be used and the structure kept small. A single gap structure has the advantage that each gap can be independently phased to produce the desired beam dynamics behavior for various ion species and ion energies. However at low frequencies, single gap resonant structures can be large. We find that the two-gap structure, where the phase difference between gaps, for the design reference particle, is fixed at {pi} radians can give acceptable performance provided that the individual two gap cells in the entire accelerator are optimized for the ion species having the largest mass to charge ratio and having the maximum required output energy. Our equations show how to adjust the cavity phases and electric fields to obtain equivalent first-order accelerator performance for various ion species and energies. These equations allow for the effective evaluation of various accelerator concepts and can facilitate the tuning of a linac when changing energies and ion species. Extensive simulations have confirmed the efficacy of our equations. {copyright} {ital 1997 American Institute of Physics.}

  16. Energy Band-Gap Engineering of Graphene Nanoribbons Melinda Y. Han,1

    E-Print Network [OSTI]

    Kim, Philip

    , New York, New York 10027, USA 2 Department of Physics, Columbia University, New York, New York 10027Energy Band-Gap Engineering of Graphene Nanoribbons Melinda Y. Han,1 Barbaros O¨ zyilmaz,2 Yuanbo an energy gap near the charge neutrality point. Individual graphene layers are contacted with metal

  17. Light trapping design for low band-gap polymer solar cells

    E-Print Network [OSTI]

    John, Sajeev

    Light trapping design for low band-gap polymer solar cells Stephen Foster1,* and Sajeev John1,2 1 demonstrate numerically a 2-D nanostructured design for light trapping in a low band-gap polymer solar cell observe an enhancement in solar absorption of almost 40% relative to a planar cell. Improvements

  18. "This is a very important book that bridges the gap between modern atomic physics and modern

    E-Print Network [OSTI]

    Nahar, Sultana Nurun

    "This is a very important book that bridges the gap between modern atomic physics and modern University Sultana N. Nahar, Ohio State University Bridging the gap between physics and astronomy, this is the first integrated graduate-level textbook on atomic astrophysics. It covers the basics of atomic physics

  19. Band gap changes of GaN shocked to 13 GPa M. D. McCluskeya)

    E-Print Network [OSTI]

    McCluskey, Matthew

    Band gap changes of GaN shocked to 13 GPa M. D. McCluskeya) and Y. M. Gupta Institute for Shock, California 94304 Received 24 October 2001; accepted for publication 19 December 2001 The band gap of GaN in shock-wave experiments. Shock waves were generated by impacting the GaN samples with c-cut sapphire

  20. Why not have a gap year at a US university....in London

    E-Print Network [OSTI]

    Raina, Ramesh

    Why not have a gap year at a US university....in London Sarah Ebner July 20 2012 8:35 AM GET SENT a Gap Year Semester at their London centre. By opening its doors to school leavers based in the UK (and a limited number of exceptional sixth form students), SU London is enabling students to try out the American

  1. Filling Knowledge Gaps with Five Fuel Cycle Studies

    SciTech Connect (OSTI)

    Steven J. Piet; Jess Gehin; William Halsey; Temitope Taiwo

    2010-11-01T23:59:59.000Z

    During FY 2010, five studies were conducted of technology families’ applicability to various fuel cycle strategies to fill in knowledge gaps in option space and to better understand trends and patterns. Here, a “technology family” is considered to be defined by a type of reactor and by selection of which actinides provide fuel. This report summarizes the higher-level findings; the detailed analyses and results are documented in five individual reports, as follows: • Advanced once through with uranium fuel in fast reactors (SFR), • Advanced once through (uranium fuel) or single recycle (TRU fuel) in high temperature gas cooled reactors (HTGR), • Sustained recycle with Th/U-233 in light water reactors (LWRs), • Sustained recycle with Th/U-233 in molten salt reactors (MSR), and • Several fuel cycle missions with Fusion-Fission Hybrid (FFH). Each study examined how the designated technology family could serve one or more designated fuel cycle missions, filling in gaps in overall option space. Each study contains one or more illustrative cases that show how the technology family could be used to meet a fuel cycle mission, as well as broader information on the technology family such as other potential fuel cycle missions for which insufficient information was available to include with an illustrative case. None of the illustrative cases can be considered as a reference, baseline, or nominal set of parameters for judging performance; the assessments were designed to assess areas of option space and were not meant to be optimized. There is no implication that any of the cases or technology families are necessarily the best way to meet a given fuel cycle mission. The studies provide five examples of 1-year fuel cycle assessments of technology families. There is reasonable coverage in the five studies of the performance areas of waste management and uranium utilization. The coverage of economics, safety, and proliferation resistance and physical protection in the five studies was spotty. Some studies did not have existing or past work to draw on in one or more of these areas. Resource constraints limited the amount of new analyses that could be performed. Little or no assessment was done of how soon any of the technologies could be deployed and therefore how quickly they could impact domestic or international fuel cycle performance. There were six common R&D needs, such as the value of advanced fuels, cladding, coating, and structure that would survive high neutron fluence. When a technology family is considered for use in a new fuel cycle mission, fuel cycle performance characteristics are dependent on both the design choices and the fuel cycle approach. For example, the use of the sodium-cooled fast reactor to provide recycle in either breeder or burner mode has been studied for decades, but the SFR could be considered for once-through fuel cycle with the physical reactor design and fuel management parameters changed. In addition, the sustained recycle with Th/U-233 in LWR could be achieved with a heterogeneous assembly and derated power density. Therefore, it may or may not be adjustable for other fuel cycle missions although a reactor intended for one fuel cycle mission is built. Simple parameter adjustment in applying a technology family to a new fuel cycle mission should be avoided and, if observed, the results viewed with caution.

  2. Design, conditioning, and performance of a high voltage, high brightness dc photoelectron gun with variable gap

    SciTech Connect (OSTI)

    Maxson, Jared; Bazarov, Ivan; Dunham, Bruce; Dobbins, John; Liu, Xianghong; Smolenski, Karl [Cornell Laboratory for Accelerator-Based Sciences and Education, Cornell University, Ithaca, New York 14853 (United States)

    2014-09-15T23:59:59.000Z

    A new high voltage photoemission gun has been constructed at Cornell University which features a segmented insulator and a movable anode, allowing the cathode-anode gap to be adjusted. In this work, we describe the gun's overall mechanical and high voltage design, the surface preparation of components, as well as the clean construction methods. We present high voltage conditioning data using a 50 mm cathode-anode gap, in which the conditioning voltage exceeds 500 kV, as well as at smaller gaps. Finally, we present simulated emittance results obtained from a genetic optimization scheme using voltage values based on the conditioning data. These results indicate that for charges up to 100 pC, a 30 mm gap at 400 kV has equal or smaller 100% emittance than a 50 mm gap at 450 kV, and also a smaller core emittance, when placed as the source for the Cornell energy recovery linac photoinjector with bunch length constrained to be <3 ps rms. For 100 pC up to 0.5 nC charges, the 50 mm gap has larger core emittance than the 30 mm gap, but conversely smaller 100% emittance.

  3. Efficient Computation of Info-Gap Robustness for Finite Element Models

    SciTech Connect (OSTI)

    Stull, Christopher J. [Los Alamos National Laboratory; Hemez, Francois M. [Los Alamos National Laboratory; Williams, Brian J. [Los Alamos National Laboratory

    2012-07-05T23:59:59.000Z

    A recent research effort at LANL proposed info-gap decision theory as a framework by which to measure the predictive maturity of numerical models. Info-gap theory explores the trade-offs between accuracy, that is, the extent to which predictions reproduce the physical measurements, and robustness, that is, the extent to which predictions are insensitive to modeling assumptions. Both accuracy and robustness are necessary to demonstrate predictive maturity. However, conducting an info-gap analysis can present a formidable challenge, from the standpoint of the required computational resources. This is because a robustness function requires the resolution of multiple optimization problems. This report offers an alternative, adjoint methodology to assess the info-gap robustness of Ax = b-like numerical models solved for a solution x. Two situations that can arise in structural analysis and design are briefly described and contextualized within the info-gap decision theory framework. The treatments of the info-gap problems, using the adjoint methodology are outlined in detail, and the latter problem is solved for four separate finite element models. As compared to statistical sampling, the proposed methodology offers highly accurate approximations of info-gap robustness functions for the finite element models considered in the report, at a small fraction of the computational cost. It is noted that this report considers only linear systems; a natural follow-on study would extend the methodologies described herein to include nonlinear systems.

  4. Thin plate gap bridging study for Nd:YAG pulsed laser lap welds.

    SciTech Connect (OSTI)

    Roach, Robert Allen; Fuerschbach, Phillip William; Bernal, John E.; Norris, Jerome T.

    2006-01-01T23:59:59.000Z

    In an on going study of gap bridging for thin plate Nd:YAG laser lap welds, empirical data, high speed imaging, and computer modeling were utilized to better understand surface physics attributed to the formation and solidification of a weld pool. Experimental data indicates better gap bridging can be achieved through optimized laser parameters such as pulse length, duration, and energy. Long pulse durations at low energies generating low peak powers were found to create the highest percent of gap bridging ability. At constant peak power, gap-bridging ability was further improved by using a smaller spot diameter resulting in higher irradiances. Hence, welding in focus is preferable for bridging gaps. Gas shielding was also found to greatly impact gap-bridging ability. Gapped lap welds that could not be bridged with UHP Argon gas shielding, were easily bridged when left unshielded and exposed to only air. Incident weld angle and joint offset were also investigated for their ability to improve gap bridging. Optical filters and brightlight surface illumination enabled high-speed imaging to capture the fluid dynamics of a forming and solidifying weld pool. The effects of various laser parameters and the weld pool's interaction with the laser beam could also be observed utilizing the high-speed imaging. The work described is used to develop and validate a computer model with improved weld pool physics. Finite element models have been used to derive insight into the physics of gap bridging. The dynamics of the fluid motion within the weld pool in conjunction with the free surface physics have been the primary focus of the modeling efforts. Surface tension has been found to be a more significant factor in determining final weld pool shape than expected.

  5. Defect assistant band alignment transition from staggered to broken gap in mixed As/Sb tunnel field effect transistor heterostructure

    E-Print Network [OSTI]

    Yener, Aylin

    .3As heterointerface. As a result, the band alignment was converted from staggered gap to broken gap-to-source voltage, VGS. As the SS of a MOSFET is governed by the transport mechanism of thermionic-emission over

  6. Electrochemical Waves on Patterned Surfaces: Propagation through Narrow Gaps and Konstantin Agladze, Stephanie Thouvenel-Romans, and Oliver Steinbock*

    E-Print Network [OSTI]

    Steinbock, Oliver

    Electrochemical Waves on Patterned Surfaces: Propagation through Narrow Gaps and Channels propagation through narrow gaps and long channels. In channels, the wave velocity decreases with decreasing dynamically similar phenomena such as propagating fronts, target patterns, and rotating spiral waves. Pattern

  7. Theorem on the existence of a nonzero energy gap in adiabatic quantum computation

    E-Print Network [OSTI]

    Da-Jian Zhang; Xiao-Dong Yu; D. M. Tong

    2014-10-14T23:59:59.000Z

    Adiabatic quantum computation, based on the adiabatic theorem, is a promising alternative to conventional quantum computation. The validity of an adiabatic algorithm depends on the existence of a nonzero energy gap between the ground and excited states. However, it is difficult to ascertain the exact value of the energy gap. In this paper, we put forward a theorem on the existence of nonzero energy gap for the Hamiltonians used in adiabatic quantum computation. It can help to effectively identify a large class of the Hamiltonians without energy-level crossing between the ground and excited states.

  8. Single-junction solar cells with the optimum band gap for terrestrial concentrator applications

    DOE Patents [OSTI]

    Wanlass, M.W.

    1994-12-27T23:59:59.000Z

    A single-junction solar cell is described having the ideal band gap for terrestrial concentrator applications. Computer modeling studies of single-junction solar cells have shown that the presence of absorption bands in the direct spectrum has the effect of ''pinning'' the optimum band gap for a wide range of operating conditions at a value of 1.14[+-]0.02 eV. Efficiencies exceeding 30% may be possible at high concentration ratios for devices with the ideal band gap. 7 figures.

  9. Fact #837: September 8, 2014 Gap between Net Imports and Total Imports of Petroleum is Widening – Dataset

    Broader source: Energy.gov [DOE]

    Excel file with dataset for Fact #837: Gap between Net Imports and Total Imports of Petroleum is Widening

  10. GAP-independent termination of photoreceptor light response by excess gamma subunit of the cGMP-phosphodiesterase

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    of photoreceptor signal termination. Invest Oph- thalmol VisMolecular GAP-Independent Termination of Photoreceptor Light

  11. Molten Carbonate and Phosphoric Acid Stationary Fuel Cells: Overview and Gap Analysis

    Fuel Cell Technologies Publication and Product Library (EERE)

    This report details technical and cost gap analyses of molten carbonate fuel cell and phosphoric acid fuel cell stationary fuel cell power plants and identifies pathways for reducing costs.

  12. Molten Carbonate and Phosphoric Acid Stationary Fuel Cells: Overview and Gap Analysis

    SciTech Connect (OSTI)

    Remick, R.; Wheeler, D.

    2010-09-01T23:59:59.000Z

    This report describes the technical and cost gap analysis performed to identify pathways for reducing the costs of molten carbonate fuel cell (MCFC) and phosphoric acid fuel cell (PAFC) stationary fuel cell power plants.

  13. Fact #837: September 8, Gap between Net Imports and Total Imports...

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

    exports) were 6.2 million barrels per day in 2013 - the lowest since the 1980's (dark blue line). The widening gap between total imports (light blue line) and net imports (dark...

  14. Calculation of wakefields in a 17 GHz beam-driven photonic band-gap accelerator structure

    E-Print Network [OSTI]

    Hu, Min

    We present the theoretical analysis and computer simulation of the wakefields in a 17 GHz photonic band-gap (PBG) structure for accelerator applications. Using the commercial code CST Particle Studio, the fundamental ...

  15. Extended variational approach to the SU(2) mass gap on the lattice

    SciTech Connect (OSTI)

    Akeyo, J.O. (Physics Department, Kenyatta University, P.O. Box 43844, Nairobi, Kenya (Kenya)); Jones, H.F.; Parker, C.S. (Blackett Laboratory, Imperial College, London, SW7 2BZ (United Kingdom))

    1995-02-01T23:59:59.000Z

    The linear [delta] expansion is applied to a calculation of the SU(2) mass gap on the lattice. Our results compare favorably with the strong-coupling expansion and are in good agreement with recent Monte Carlo estimates.

  16. Bridging the Learning Gap in the Market for Higher Education: Elearning and Public Subsidies

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    two types of learning organizations ­ namely, traditional learning and e learning, thus providing somehow distant learning features. Following the developing of such new typesBridging the Learning Gap in the Market for Higher Education: Elearning and Public Subsidies Ben

  17. Tunable frequency band-gap and pulse propagation in a strongly nonlinear diatomic chain

    E-Print Network [OSTI]

    E. B. Herbold; J. Kim; V. F. Nesterenko; S. Wang; C. Daraio

    2008-06-26T23:59:59.000Z

    One-dimensional nonlinear phononic crystals have been assembled from periodic diatomic chains of stainless steel cylinders alternated with Polytetrafluoroethylene (PTFE) spheres. We report the presence of acoustic band gaps in the dispersion relation of the linearized systems and study the transformation of single and multiple pulses in linear, nonlinear and strongly nonlinear regimes with numerical calculations and experiments. The limiting frequencies of the band gap are within the audible frequency range (20-20,000 Hz) and can be tuned by varying the particle's material properties, mass and initial compression. Pulses rapidly transform within very short distances from the impacted end due to the influence of the band gap in the linear and in nonlinear elastic chains. The effects of an in situ band gap created by a mean dynamic compression are observed in the strongly nonlinear wave regime.

  18. Large inherent optical gain from the direct gap transition of Ge thin films

    E-Print Network [OSTI]

    Wang, Xiaoxin

    The recent demonstration of Ge-on-Si diode lasers renews the interest in the unique carrier dynamics of Ge involving both direct (?) and indirect (L) valleys. Here, we report a large inherent direct gap optical gain ...

  19. Direct gap photoluminescence of n-type tensile-strained Ge-on-Si

    E-Print Network [OSTI]

    Sun, Xiaochen

    Room temperature direct gap photoluminescence (PL) was observed from n-type tensile-strained epitaxial Ge-on-Si. The PL intensity increases with n-type doping due to a higher electron population in the direct ? valley as ...

  20. Photonic band gap of a graphene-embedded quarter-wave stack

    SciTech Connect (OSTI)

    Fan, Yuancheng [Ames Laboratory; Wei, Zeyong [Tongji University; Li, Hongqiang [Tongji University; Chen, Hong [Tongji University; Soukoulis, Costas M [Ames Laboratory

    2013-12-10T23:59:59.000Z

    Here, we present a mechanism for tailoring the photonic band structure of a quarter-wave stack without changing its physical periods by embedding conductive sheets. Graphene is utilized and studied as a realistic, two-dimensional conductive sheet. In a graphene-embedded quarter-wave stack, the synergic actions of Bragg scattering and graphene conductance contributions open photonic gaps at the center of the reduced Brillouin zone that are nonexistent in conventional quarter-wave stacks. Such photonic gaps show giant, loss-independent density of optical states at the fixed lower-gap edges, of even-multiple characteristic frequency of the quarter-wave stack. The conductive sheet-induced photonic gaps provide a platform for the enhancement of light-matter interactions.

  1. Codes and Standards Gap Analysis Helps DOE Define Research Priorities (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2010-11-01T23:59:59.000Z

    This fact sheet describes NREL's accomplishments in analyzing gaps in codes and standards for alternative vehicle fuels, including hydrogen. Work was performed by the Hydrogen Technologies and Systems Center.

  2. Gap junction intercellular communication: a microinjection investigation of fibroblast and epithelial cell lines 

    E-Print Network [OSTI]

    Pahlka, Raymond Benton

    2002-01-01T23:59:59.000Z

    parameters as well as optimal cell conditions for effective, repeatable studies using the microinjection protocol. The second objective was to determine whether or not the AG1522 cell line exhibited gap junction intercellular communication (GJIC) through...

  3. Procedures for Filling Short Gaps in Energy Use and Weather Data

    E-Print Network [OSTI]

    Chen, H.; Claridge, D. E.

    2000-01-01T23:59:59.000Z

    data. Single variable regression, polynomial models, Lagrange interpolation, and linear interpolation models are developed, demonstrated, and used to fill 1-6 hour gaps in weather data, heating data and cooling data for commercial buildings...

  4. Parton-Parton Elastic Scattering and Rapidity Gaps at Tevatron Energies

    E-Print Network [OSTI]

    Vittorio Del Duca; Wai-Keung Tang

    1993-08-02T23:59:59.000Z

    The theory of the perturbative pomeron, due to Lipatov and collaborators, is used to compute the probability of observing parton-parton elastic scattering and rapidity gaps between jets in hadron collisions at Tevatron energies.

  5. Parton-Parton Elastic Scattering and Rapidity Gaps at SSC and LHC Energies

    E-Print Network [OSTI]

    Vittorio Del Duca

    1993-08-02T23:59:59.000Z

    The theory of the perturbative pomeron, due to Lipatov and collaborators, is used to compute the probability of observing parton-parton elastic scattering and rapidity gaps between jets in hadron collisions at SSC and LHC energies.

  6. Mid-Gap Electronic States in Zn1 xMnxO. | EMSL

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

    measurements were performed on epitaxial Zn1 xMnxO films to investigate the origin of the new mid-gap band that appears upon introduction of Mn2+ into the ZnO lattice. Absorption...

  7. Developing Secure Power Systems Professional Competence: Alignment and Gaps in Workforce Development Programs—Summary Report

    SciTech Connect (OSTI)

    O'Neil, Lori Ross; Assante, Michael; Tobey, D. H.; Conway, T. J.; Vanderhorst, Jr, T. J.; Januszewski, III, J.; Leo, R.; Perman, K.

    2013-07-01T23:59:59.000Z

    This document is a summarization of the report, Developing Secure Power Systems Professional Competence: Alignment and Gaps in Workforce Development Programs, the final report for phase 2 of the SPSP (DOE workforce study) project.

  8. Variation of treefall gap characteristics in an East Texas bottomland hardwood forest: effects of microtopography

    E-Print Network [OSTI]

    Almquist, Benjamin Eric

    1998-01-01T23:59:59.000Z

    such as bottomland hardwood forests. This study examined differences in the treefall gap regime among three microtopographical classes - bowl, ridge, and slope - in a late-successional hardwood stand on the Neches River floodplain near Spurger, Texas. I tested...

  9. Variation of treefall gap characteristics in an East Texas bottomland hardwood forest: effects of microtopography 

    E-Print Network [OSTI]

    Almquist, Benjamin Eric

    1998-01-01T23:59:59.000Z

    such as bottomland hardwood forests. This study examined differences in the treefall gap regime among three microtopographical classes - bowl, ridge, and slope - in a late-successional hardwood stand on the Neches River floodplain near Spurger, Texas. I tested...

  10. Thermophotovoltaic conversion using selective infrared line emitters and large band gap photovoltaic devices

    DOE Patents [OSTI]

    Brandhorst, Jr., Henry W. (Auburn, AL); Chen, Zheng (Auburn, AL)

    2000-01-01T23:59:59.000Z

    Efficient thermophotovoltaic conversion can be performed using photovoltaic devices with a band gap in the 0.75-1.4 electron volt range, and selective infrared emitters chosen from among the rare earth oxides which are thermally stimulated to emit infrared radiation whose energy very largely corresponds to the aforementioned band gap. It is possible to use thermovoltaic devices operating at relatively high temperatures, up to about 300.degree. C., without seriously impairing the efficiency of energy conversion.

  11. A constrained theory of non-BCS type superconductivity in gapped Graphene

    E-Print Network [OSTI]

    Vivek M. Vyas; Prasanta K. Panigrahi

    2011-07-27T23:59:59.000Z

    We show that gapped Graphene, with a local constraint that current arising from the two valley fermions are exactly equal, shows a non-BCS type superconductivity. Unlike the conventional mechanisms, this superconductivity phenomenon does not require any pairing. We estimate the critical temperature for superconducting-to-normal transition via Berezinskii-Kosterlitz-Thouless mechanism, and find that it is proportional to the gap.

  12. On the gap-opening criterion of migrating planets in protoplanetary disks

    E-Print Network [OSTI]

    Malik, Matej; Mayer, Lucio; Meyer, Michael R

    2015-01-01T23:59:59.000Z

    We perform two-dimensional hydrodynamical simulations to quantitatively explore the torque balance criterion for gap-opening (as formulated by Crida et al. 2006) in a variety of disks when considering a migrating planet. We find that even when the criterion is satisfied, there are instances when planets still do not open gaps. We stress that gap-opening is not only dependent on whether a planet has the ability to open a gap, but whether it can do so quickly enough. This can be expressed as an additional condition on the gap-opening timescale versus the crossing time, i.e. the time it takes the planet to cross the region which it is carving out. While this point has been briefly made in the previous literature, our results quantify it for a range of protoplanetary disk properties and planetary masses, demonstrating how crucial it is for gap-opening. This additional condition has important implications for the survival of planets formed by core accretion in low mass disks as well as giant planets or brown dwarf...

  13. Dust Filtration by Planet-Induced Gap Edges: Implications for Transitional Disks

    E-Print Network [OSTI]

    Zhu, Zhaohuan; Dong, Ruobing; Espaillat, Catherine; Hartmann, Lee

    2012-01-01T23:59:59.000Z

    By carrying out two-dimensional two-fluid global simulations, we have studied the response of dust to gap formation by a single planet in the gaseous component of a protoplanetary disk - the so-called "dust filtration" mechanism. We have found that a gap opened by a giant planet at 20 AU in a \\alpha=0.01, \\dot{M}=10^{-8} Msun/yr disk can effectively stop dust particles larger than 0.1 mm drifting inwards, leaving a sub-millimeter dust cavity/hole. However, smaller particles are difficult to filter by a planet-induced gap due to 1) dust diffusion, and 2) a high gas accretion velocity at the gap edge. An analytic model is also derived to understand what size particles can be filtered by the gap edge. Finally, with our updated understanding of dust filtration, we have computed Monte-Carlo radiative transfer models with variable dust size distributions to generate the spectral energy distributions (SEDs) of disks with gaps. By comparing with transitional disk observations (e.g. GM Aur), we have found that dust fi...

  14. TBC-Domain GAPs for Rab GTPases Accelerate GTP Hydrolysis by a Dual-Finger Mechanism

    SciTech Connect (OSTI)

    Pan,X.; Eathiraj, S.; Lambright, D.

    2006-01-01T23:59:59.000Z

    Rab GTPases regulate membrane trafficking by cycling between inactive (GDP-bound) and active (GTP-bound) conformations. The duration of the active state is limited by GTPase-activating proteins (GAPs), which accelerate the slow intrinsic rate of GTP hydrolysis. Proteins containing TBC (Tre-2, Bub2 and Cdc16) domains are broadly conserved in eukaryotic organisms and function as GAPs for Rab GTPases as well as GTPases that control cytokinesis. An exposed arginine residue is a critical determinant of GAP activity in vitro and in vivo. It has been expected that the catalytic mechanism of TBC domains would parallel that of Ras and Rho family GAPs. Here we report crystallographic, mutational and functional analyses of complexes between Rab GTPases and the TBC domain of Gyp1p. In the crystal structure of a TBC-domain-Rab-GTPase-aluminium fluoride complex, which approximates the transition-state intermediate for GTP hydrolysis, the TBC domain supplies two catalytic residues in trans, an arginine finger analogous to Ras/Rho family GAPs and a glutamine finger that substitutes for the glutamine in the DxxGQ motif of the GTPase. The glutamine from the Rab GTPase does not stabilize the transition state as expected but instead interacts with the TBC domain. Strong conservation of both catalytic fingers indicates that most TBC-domain GAPs may accelerate GTP hydrolysis by a similar dual-finger mechanism.

  15. Two decades before launching Clipper, its founder, James Dehlsen, had started Zond, a pioneering U.S. wind power firm. Zond worked closely with NREL, and once it was acquired by

    E-Print Network [OSTI]

    Laboratory (NREL) and newly formed wind turbine builder, Clipper Windpower Inc., forged a partnership based, a pioneering U.S. wind power firm. Zond worked closely with NREL, and once it was acquired by another firm in the late 1990s, Dehlsen was free to pursue his latest wind turbine innovations. His new idea

  16. Utrecht University is firmly rooted in society. It not only responds to civic developments, it actively contributes to them. It is with just cause that the

    E-Print Network [OSTI]

    Utrecht, Universiteit

    An overall impression of 2012 #12;Foreword Utrecht University is firmly rooted in society yet again in the international and national rankings. Regionally, nationally and worldwide, Utrecht, Sustainability and Life Sciences. With these choices, Utrecht University is closely aligned to the Dutch top

  17. Abstract--We formulate a three-period model for studying how the exercise of local market power by generation firms

    E-Print Network [OSTI]

    by generation firms affects the equilibrium investment between the generation and the transmission sectors-efficient equilibrium of generation investments) with both those made by an integrated-resources planner (who jointly plans generation and transmission expansions) and those made by a "reactive" network planner (who plans

  18. Abstract--We formulate a three-period model for studying how the exercise of local market power by generation firms

    E-Print Network [OSTI]

    Oren, Shmuel S.

    by generation firms affects the equilibrium investment between the generation and the transmission sectors-efficient equilibrium of generation investments) with both those made by an integrated- resources planner (who jointly plans generation and transmission expansions) and those made by a "reactive" network planner (who plans

  19. Traditional communities, multinationals and biodiversity: the example of an innovative partnership between the cosmetic firm Natura and the Brazil nut extractivists of So

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    between the cosmetic firm Natura and the Brazil nut extractivists of São Francisco in the Sustainable Studies Association, Rio de Janeiro, Brazil, June 11-14th , 2009. 1 halshs-00493592,version1-20Jun2010 Author manuscript, published in "LASA 2009 conference, Rion de janeiro : Brazil (2009)" #12;Abstract

  20. How the Second Amendment to China's Patent Law Affects Firms' Patenting Behavior In this study, we examine how the second amendment to China's patent law affects the

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    How the Second Amendment to China's Patent Law Affects Firms' Patenting Behavior Abstract In this study, we examine how the second amendment to China's patent law affects the patenting behavior passed a second amendment to its patent system in 2000 in accordance with the Trade-Related Aspects

  1. Computer Methods International Corp. (CMiC) is a software Development firm specializing in enterprise financial and cost management systems designed for the

    E-Print Network [OSTI]

    Ellis, Randy

    Computer Methods International Corp. (CMiC) is a software Development firm specializing/SQL o Oracle - 9i / 10g / 11g #12;o Java Reporting Tools · Knowledge / Experience of the following is an asset: o Oracle Reports o JSP / JSF / HTML / Web Technologies · Excellent written and oral communication

  2. Computer Methods International Corp. (CMiC) is a software Development firm specializing in enterprise financial and cost management systems designed for the

    E-Print Network [OSTI]

    Ellis, Randy

    Computer Methods International Corp. (CMiC) is a software Development firm specializing CMiC meets our overall SLA's in order to provide optimum maintenance and consistency across development · Provide guidance, support and reporting with other management members · Other related duties

  3. LOW-MASS PLANETS IN PROTOPLANETARY DISKS WITH NET VERTICAL MAGNETIC FIELDS: THE PLANETARY WAKE AND GAP OPENING

    SciTech Connect (OSTI)

    Zhu Zhaohuan; Stone, James M.; Rafikov, Roman R., E-mail: zhzhu@astro.princeton.edu, E-mail: jstone@astro.princeton.edu, E-mail: rrr@astro.princeton.edu [Department of Astrophysical Sciences, Princeton University, Princeton, NJ, 08544 (United States)

    2013-05-10T23:59:59.000Z

    Some regions in protoplanetary disks are turbulent, while some regions are quiescent (e.g. the dead zone). In order to study how planets open gaps in both inviscid hydrodynamic disk (e.g. the dead zone) and the disk subject to magnetorotational instability (MRI), we carried out both shearing box two-dimensional inviscid hydrodynamical simulations and three-dimensional unstratified magnetohydrodynamical (MHD) simulations (having net vertical magnetic fields) with a planet at the box center. We found that, due to the nonlinear wave steepening, even a low mass planet can open gaps in both cases, in contradiction to the ''thermal criterion'' for gap opening. In order to understand if we can represent the MRI turbulent stress with the viscous {alpha} prescription for studying gap opening, we compare gap properties in MRI-turbulent disks to those in viscous HD disks having the same stress, and found that the same mass planet opens a significantly deeper and wider gap in net vertical flux MHD disks than in viscous HD disks. This difference arises due to the efficient magnetic field transport into the gap region in MRI disks, leading to a larger effective {alpha} within the gap. Thus, across the gap, the Maxwell stress profile is smoother than the gap density profile, and a deeper gap is needed for the Maxwell stress gradient to balance the planetary torque density. Comparison with previous results from net toroidal flux/zero flux MHD simulations indicates that the magnetic field geometry plays an important role in the gap opening process. We also found that long-lived density features (termed zonal flows) produced by the MRI can affect planet migration. Overall, our results suggest that gaps can be commonly produced by low mass planets in realistic protoplanetary disks, and caution the use of a constant {alpha}-viscosity to model gaps in protoplanetary disks.

  4. Avian response to microclimate in canopy gaps in a bottomland hardwood forest.

    SciTech Connect (OSTI)

    Champlin, Tracey B.; Kilgo, John C.; Gumpertz, Marcia L.; Moorman, Christopher E.

    2009-04-01T23:59:59.000Z

    Abstract - Microclimate may infl uence use of early successional habitat by birds. We assessed the relationships between avian habitat use and microclimate (temperature, light intensity, and relative humidity) in experimentally created canopy gaps in a bottomland hardwood forest on the Savannah River Site, SC. Gaps were 2- to 3-year-old group-selection timber harvest openings of three sizes (0.13, 0.26, 0.50 ha). Our study was conducted from spring through fall, encompassing four bird-use periods (spring migration, breeding, post-breeding, and fall migration), in 2002 and 2003. We used mist netting and simultaneously recorded microclimate variables to determine the influence of microclimate on bird habitat use. Microclimate was strongly affected by net location within canopy gaps in both years. Temperature generally was higher on the west side of gaps, light intensity was greater in gap centers, and relative humidity was higher on the east side of gaps. However, we found few relationships between bird captures and the microclimate variables. Bird captures were inversely correlated with temperature during the breeding and postbreeding periods in 2002 and positively correlated with temperature during spring 2003. Captures were high where humidity was high during post-breeding 2002, and captures were low where humidity was high during spring 2003. We conclude that variations in the local microclimate had minor infl uence on avian habitat use within gaps. Instead, habitat selection in relatively mild regions like the southeastern US is based primarily on vegetation structure, while other factors, including microclimate, are less important.

  5. ANALYSIS OF THE AXIAL GAP VS FIBERBOARD MOISTURE CONTENT IN A 9975 SHIPPING PACKAGE

    SciTech Connect (OSTI)

    Daugherty, W.

    2013-09-30T23:59:59.000Z

    The fiberboard assembly within a 9975 shipping package contains a modest amount of moisture, which can migrate to the cooler regions of the package when an internal heat load is present. Typically, this leads to increased moisture levels in the bottom fiberboard layers, along with elevated chloride levels which can leach from the fiberboard. Concerns have been raised that this condition could lead to corrosion of the stainless steel drum. It has been postulated that checking the axial gap at the top of the package against the current 1 inch maximum criterion provides a sufficient indication regarding the integrity of the fiberboard and drum. This report estimates the increase in axial gap that might be expected for a given moisture increase in the bottom fiberboard layers, and the likelihood that the increase will create a nonconforming condition that will lead to identification of the moisture increase. Using data relating the fiberboard moisture content with the degree of compaction under load, the present analysis indicates that the axial gap will increase by 0.282 inch as the bottom fiberboard layers approach the saturation point. This increase will cause approximately 58% of packages with otherwise nominal package component dimensions to fail the axial gap criterion, based on a survey of axial gap values recorded in K-Area surveillance activities. As the moisture content increases above saturation, the predicted increase in axial gap jumps to 0.405 inch, which would result in 92% or more of all packages failing the axial gap criterion. The data and analysis described in this report are specific to cane fiberboard. While it is expected that softwood fiberboard will behave similarly, such behavior has not yet been demonstrated.

  6. Effect of gaps on the performance of the vertically installed wet thermal insulator

    SciTech Connect (OSTI)

    Kim, S. H.; Kim, Y. I.; Park, C. T.; Choi, S.; Yoon, J. [Korea Atomic Energy Research Inst., Daeduk-daero 989-111, Yuseong-Gu, Daejeon, 305-353 (Korea, Republic of)

    2012-07-01T23:59:59.000Z

    In SMART, the main flow path of the reactor coolant and the pressurizer partially share common walls in the reactor coolant system. To reduce this heat transfer, the wet thermal insulator (WTI) is installed on the inner wall of the pressurizer. The WTI is constituted of stacked thin stainless steel plates. The water layer width between the plates is chosen to suppress natural convection in each layer. The plates of the WTI require clearance for thermal expansion. When the WTI is installed on a vertical wall, this clearance might cause gaps at the top and bottom at the operating condition. In this study, we focused on the effect of gaps at the both ends on the WTI performance. A numerical simulation was conducted for an 8-layer WTI with gaps at the both ends. To compare with this, a simulation of a WTI without a gap, which is an ideal case, was also conducted. The simulation was conducted in a 2-dimensional manner by a commercial computational fluid dynamics code, FLUENT. The simulations showed that the WTI thermal performance was substantially decreased by a flow that circulated through the top and bottom gaps and water layers at the sides of the WTI. This circulation caused a high temperature difference between the wall and the circulating flow. To find a way to prevent this performance deterioration of the WTI we simulated several cases with the smaller gap heights. However, the flow circulation and the higher heat transfer rate were still observed even at a case with the smallest gap, which seems to be hardly achievable in a real installation. Another way of reducing the flow circulation was suggested and also simulated in this study. (authors)

  7. Band gap engineering for graphene by using Na{sup +} ions

    SciTech Connect (OSTI)

    Sung, S. J.; Lee, P. R.; Kim, J. G.; Ryu, M. T.; Park, H. M.; Chung, J. W., E-mail: jwc@postech.ac.kr [Department of Physics, Pohang University of Science and Technology, Pohang 790-784 (Korea, Republic of)

    2014-08-25T23:59:59.000Z

    Despite the noble electronic properties of graphene, its industrial application has been hindered mainly by the absence of a stable means of producing a band gap at the Dirac point (DP). We report a new route to open a band gap (E{sub g}) at DP in a controlled way by depositing positively charged Na{sup +} ions on single layer graphene formed on 6H-SiC(0001) surface. The doping of low energy Na{sup +} ions is found to deplete the ?* band of graphene above the DP, and simultaneously shift the DP downward away from Fermi energy indicating the opening of E{sub g}. The band gap increases with increasing Na{sup +} coverage with a maximum E{sub g}?0.70?eV. Our core-level data, C 1s, Na 2p, and Si 2p, consistently suggest that Na{sup +} ions do not intercalate through graphene, but produce a significant charge asymmetry among the carbon atoms of graphene to cause the opening of a band gap. We thus provide a reliable way of producing and tuning the band gap of graphene by using Na{sup +} ions, which may play a vital role in utilizing graphene in future nano-electronic devices.

  8. Solar UV-B in tropical forest gaps: Analysis using direct and diffuse radiation

    SciTech Connect (OSTI)

    Flint, S.D.; Caldwell, M.M. [Utah State Univ., Logan, UT (United States)

    1995-06-01T23:59:59.000Z

    Experiments with natural levels of solar ultraviolet-B radiation (UV-B) have recently shown inhibition of the growth of some tropical forest tree seedlings. A knowledge of forest radiation environments is needed to help assess UV-B effects in natural situations. Although forest canopies strongly attenuate solar radiation, treefall gaps provide a very different radiation environment. We simultaneously measured both UV-B and photosynthetically active radiation (PAR) in forest gaps on Barro Colorado Island, Panama. Outside the forest, UV-B is predominately diffuse even under clear sky conditions. In sunflecks of small forest gaps, most of the UV-B was in the direct beam component. Compared to conditions outside the forest, the UV-B in these sunflecks was low relative to PAR. Shaded portions of the gap, in contrast, had proportionately high levels of UV-B relative to PAR. There are indications in the literature that relatively low UV-B levels may be effective under low PFD. Seasonal trends of PAR and UV-B in different locations in gaps can be inferred from hemispherical canopy photographs.

  9. Gamma-Ray Burst Polarimeter - GAP - aboard the Small Solar Power Sail Demonstrator IKAROS

    E-Print Network [OSTI]

    Yonetoku, D; Gunji, S; Mihara, T; Sakashita, T; Morihara, Y; Kikuchi, Y; Fujimoto, H; Toukairin, N; Kodama, Y; Kubo, S

    2010-01-01T23:59:59.000Z

    The small solar power sail demonstrator "IKAROS" is a Japanese engineering verification spacecraft launched by H-IIA rocket on May 21, 2010 at JAXA Tanegashima Space Center. IKAROS has a huge sail with 20 m in diameter which is made of thin polyimide membrane. This sail converts the solar radiation-pressure into the propulsion force of IKAROS and accelerates the spacecraft. The Gamma-Ray Burst Polarimeter (GAP) aboard IKAROS is the first polarimeter to observe the gamma-ray polarization of Gamma-Ray Bursts (GRBs) during the IKAROS cruising phase. GAP is a tinny detector of 3.8 kg in weight and 17 cm in size with an energy range between 50-300 keV. The GAP detector also plays a role of the interplanetary network (IPN) to determine the GRB direction. The detection principle of gamma-ray polarization is the anisotropy of the Compton scattering. GAP works as the GRB polarimeter with the full coincidence mode between the central plastic and the surrounding CsI detectors. GAP is the first instrument, devoted for th...

  10. Heat transfer in rotating rectangular channels (AR=4:1) with V-shaped and angled rib turbulators with and without gaps 

    E-Print Network [OSTI]

    Lee, Eungsuk

    2003-01-01T23:59:59.000Z

    and trailing surfaces: parallel and staggered V-shaped ribs without gaps, parallel and staggered angled ribs without gaps, parallel V-shaped ribs with gaps, and parallel angled ribs with gaps are considered. The rib height-to-hydraulic diameter ratio (e...

  11. Microwave band gap and cavity mode in spoof-insulator-spoof waveguide with multiscale structured surface

    E-Print Network [OSTI]

    Zhang, Qiang; Han, Dezhuan; Qin, Fei Fei; Zhang, Xiao Ming; Yao, Yong

    2015-01-01T23:59:59.000Z

    We propose a multiscale spoof-insulator-spoof (SIS) waveguide by introducing periodic geometry modulation in the wavelength scale to a SIS waveguide made of perfect electric conductor. The MSIS consists of multiple SIS subcells. The dispersion relationship of the fundamental guided mode of the spoof surface plasmon polaritons (SSPPs) is studied analytically within the small gap approximation. It is shown that the multiscale SIS possesses microwave band gap (MBG) due to the Bragg scattering. The "gap maps" in the design parameter space are provided. We demonstrate that the geometry of the subcells can efficiently adjust the effective refraction index of the elementary SIS and therefore further control the width and the position of the MBG. The results are in good agreement with numerical calculations by the finite element method (FEM). For finite-sized MSIS of given geometry in the millimeter scale, FEM calculations show that the first-order symmetric SSPP mode has zero transmission in the MBG within frequency...

  12. Dome-like variation of the superconducting gap anisotropy in Fe-based superconductors

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

    Prozorov, Ruslan; Cho, Kyuil; Kim, Hyong June; Tanatar, Makariy

    2013-07-17T23:59:59.000Z

    Experiments performed on different iron-based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing mechanisms, it is important to identify common features in the behavior of different materials. Measurements of the temperature - dependent London penetration depth provide important information on the structure of the superconducting gap. We show that despite significant differences between different iron - based superconductors, there is a universal trend: the gap is least anisotropic at the optimal doping and its anisotropy increases upon the departure towards underdoped and overdoped ends of the ''superconducting dome''.more »This trend is not related to the presence of the long-range magnetic order in the underdoped state.« less

  13. One-dimensional electromagnetic band gap structures formed by discharge plasmas in a waveguide

    SciTech Connect (OSTI)

    Arkhipenko, V. I.; Simonchik, L. V., E-mail: l.simonchik@dragon.bas-net.by; Usachonak, M. S. [B.I. Stepanov Institute of Physics of the NAS of Belarus, Ave. Nezavisimostsi 68, 220072 Minsk (Belarus); Callegari, Th.; Sokoloff, J. [Université de Toulouse, UPS, INPT, LAPLACE, Laboratoire Plasma et Conversion d'Energie, 118 route de Narbonne, F-31062 Toulouse cedex 9 (France)

    2014-09-28T23:59:59.000Z

    We demonstrate the ability to develop one-dimensional electromagnetic band gap structure in X-band waveguide solely by using the positive columns of glow discharges in neon at the middle pressure. Plasma inhomogeneities are distributed uniformly along a typical X-band waveguide with cross section of 23?×?10?mm{sup 2}. It is shown that electron densities larger than 10{sup 14?}cm{sup ?3} are needed in order to create an effective one-dimensional electromagnetic band gap structure. Some applications for using the one-dimensional electromagnetic band gap structure in waveguide as a control of microwave (broadband filter and device for variation of pulse duration) are demonstrated.

  14. Dome-like variation of the superconducting gap anisotropy in Fe-based superconductors

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

    Prozorov, Ruslan [Ames Lab., Ames, IA (United States); Cho, Kyuil [Ames Lab., Ames, IA (United States); Kim, Hyong June [Ames Lab., Ames, IA (United States); Tanatar, Makariy [Ames Lab., Ames, IA (United States)

    2013-07-17T23:59:59.000Z

    Experiments performed on different iron-based superconductors suggest a variety of possible structures of the superconducting energy gap, both nodeless and nodal. To understand the pairing mechanisms, it is important to identify common features in the behavior of different materials. Measurements of the temperature - dependent London penetration depth provide important information on the structure of the superconducting gap. We show that despite significant differences between different iron - based superconductors, there is a universal trend: the gap is least anisotropic at the optimal doping and its anisotropy increases upon the departure towards underdoped and overdoped ends of the ''superconducting dome''. This trend is not related to the presence of the long-range magnetic order in the underdoped state.

  15. Designing double-gap linear accelerators for a wide mass range

    SciTech Connect (OSTI)

    Lysenko, W.P.; Wadlinger, E.A.; Rusnak, B.; Krawczyk, F. [Los Alamos National Lab., NM (United States); Saadatmand, K.; Wan, Z. [Eaton Corp., Beverly, MA (United States)

    1998-12-31T23:59:59.000Z

    For applications like ion implantation, rf linacs using double-gap structures with external resonators can be used because they are practical at low frequencies. However, since the two gaps associated with a given resonator cannot be individually phased, it is not obvious how to build a linac that can efficiently accelerate particles having different mass/charge ratios. This paper describes the beam dynamics of double-gap rf linacs and shows how to maximize the range of mass/charge ratios. The theory also tells one how to rescale a linac tune (i.e., reset the voltages and phases) so that a new particle, having a different mass or charge, will behave similarly to the original particle.

  16. Method of manufacturing flexible metallic photonic band gap structures, and structures resulting therefrom

    DOE Patents [OSTI]

    Gupta, Sandhya (Bloomington, MN); Tuttle, Gary L. (Ames, IA); Sigalas, Mihail (Ames, IA); McCalmont, Jonathan S. (Ames, IA); Ho, Kai-Ming (Ames, IA)

    2001-08-14T23:59:59.000Z

    A method of manufacturing a flexible metallic photonic band gap structure operable in the infrared region, comprises the steps of spinning on a first layer of dielectric on a GaAs substrate, imidizing this first layer of dielectric, forming a first metal pattern on this first layer of dielectric, spinning on and imidizing a second layer of dielectric, and then removing the GaAs substrate. This method results in a flexible metallic photonic band gap structure operable with various filter characteristics in the infrared region. This method may be used to construct multi-layer flexible metallic photonic band gap structures. Metal grid defects and dielectric separation layer thicknesses are adjusted to control filter parameters.

  17. Direct measurements of band gap grading in polycrystalline CIGS solar cells

    E-Print Network [OSTI]

    Heinrich, M P; Zhang, Y; Kiowski, O; Powalla, M; Lemmer, U; Slobodskyy, A

    2010-01-01T23:59:59.000Z

    We present direct measurements of depth-resolved band gap variations of CuIn(1-x)Ga(x)Se2 thin-film solar cell absorbers. A new measurement technique combining parallel measurements of local thin-film interference and spectral photoluminescence was developed for this purpose. We find sample-dependent correlation parameters between measured band gap depth and composition profiles, and emphasize the importance of direct measurements. These results bring a quantitative insight into the electronic properties of the solar cells and open a new way to analyze parameters that determine the efficiency of solar cells.

  18. Simulations of the spontaneous emission of a quantum dot near a gap plasmon waveguide

    SciTech Connect (OSTI)

    Perera, Chamanei S., E-mail: cp.hettiarachchige@qut.edu.au; Vernon, Kristy C.; Mcleod, Angus [Plasmonic Device Group, Queensland University of Technology, GPO box 2434, Brisbane, Queensland (Australia)

    2014-02-07T23:59:59.000Z

    In this paper, we modeled a quantum dot at near proximity to a gap plasmon waveguide to study the quantum dot-plasmon interactions. Assuming that the waveguide is single mode, this paper is concerned about the dependence of spontaneous emission rate of the quantum dot on waveguide dimensions such as width and height. We compare coupling efficiency of a gap waveguide with symmetric configuration and asymmetric configuration illustrating that symmetric waveguide has a better coupling efficiency to the quantum dot. We also demonstrate that optimally placed quantum dot near a symmetric waveguide with 50?nm?×?50?nm cross section can capture 80% of the spontaneous emission into a guided plasmon mode.

  19. Gap anisotropy and universal pairing scale in a spin-fluctuation model of cuprate superconductors

    E-Print Network [OSTI]

    Abanov, Artem; Chubukov, A. V.; Norman, M. R.

    2008-01-01T23:59:59.000Z

    Gap anisotropy and universal pairing scale in a spin-fluctuation model of cuprate superconductors Ar. Abanov,1 A. V. Chubukov,2 and M. R. Norman3 1Department of Physics, Texas A&M University, College Station, Texas 77843, USA 2Department...-Tc cu- prate superconductors is a key problem.1 Some argue that the pseudogap originates from #1;quasi-#2;long-range order in a non- pairing channel #1;two-gap scenario#2;.2 Others argue instead that the pseudogap is a phase in which fermions already...

  20. Direct measurements of band gap grading in polycrystalline CIGS solar cells

    E-Print Network [OSTI]

    M. P. Heinrich; Z-H. Zhang; Y. Zhang; O. Kiowski; M. Powalla; U. Lemmer; A. Slobodskyy

    2010-09-20T23:59:59.000Z

    We present direct measurements of depth-resolved band gap variations of CuIn(1-x)Ga(x)Se2 thin-film solar cell absorbers. A new measurement technique combining parallel measurements of local thin-film interference and spectral photoluminescence was developed for this purpose. We find sample-dependent correlation parameters between measured band gap depth and composition profiles, and emphasize the importance of direct measurements. These results bring a quantitative insight into the electronic properties of the solar cells and open a new way to analyze parameters that determine the efficiency of solar cells.

  1. Cell motility in models of wounded human skin is improved by Gap27 despite raised glucose, insulin and IGFBP-5

    SciTech Connect (OSTI)

    Wright, Catherine S.; Berends, Rebecca F. [Department of Life Sciences, School of Health and Life Sciences, Glasgow Caledonian University, 70 Cowcaddens Road, Glasgow G4 0BA (United Kingdom); Flint, David J. [Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow G4 0RE (United Kingdom); Martin, Patricia E.M., E-mail: Patricia.Martin@gcu.ac.uk [Department of Life Sciences, School of Health and Life Sciences, Glasgow Caledonian University, 70 Cowcaddens Road, Glasgow G4 0BA (United Kingdom)

    2013-02-15T23:59:59.000Z

    Reducing Cx43 expression stimulates skin wound healing. This is mimicked in models when Cx43 function is blocked by the connexin mimetic peptide Gap27. IGF-I also stimulates wound healing with IGFBP-5 attenuating its actions. Further, the IGF-I to IGFBP-5 ratio is altered in diabetic skin, where wound closure is impaired. We investigated whether Gap27 remains effective in augmenting scrape-wound closure in human skin wound models simulating diabetes-induced changes, using culture conditions with raised glucose, insulin and IGFBP-5. Gap27 increased scrape-wound closure in normal glucose and insulin (NGI) and to a lesser extent in high glucose and insulin (HGI). IGF-I enhanced scrape-wound closure in keratinocytes whereas IGFBP-5 inhibited this response. Gap27 overcame the inhibitory effects of IGFBP-5 on IGF-I activity. Connexin-mediated communication (CMC) was reduced in HGI, despite raised Cx43, and Gap27 significantly decreased CMC in NGI and HGI. IGF-I and IGFBP-5 did not affect CMC. IGF-I increased keratinocyte proliferation in NGI, and Gap27 increased proliferation in NGI to a greater extent than in HGI. We conclude that IGF-I and Gap27 stimulate scrape-wound closure by independent mechanisms with Gap27 inhibiting Cx43 function. Gap27 can enhance wound closure in diabetic conditions, irrespective of the IGF-I:IGFBP-5 balance. - Highlights: ? Human organotypic and keratinocyte ‘diabetic’ skin models were used to demonstrate the ability of Gap27 to improve scrape-wound closure. ? Gap27 enhanced scrape-wound closure by reducing Cx43-mediated communication, whereas IGFBP-5 retarded cell migration. ? IGF-I and IGFBP-5 did not affect connexin-mediated pathways. ? Gap27 can override altered glucose, insulin, IGF-I, and IGFBP-5 in ‘diabetic’ skin models and thus has therapeutic potential.

  2. Surface Plasmon Polariton Assisted Optical Switching in Noble Metal Nanoparticle Systems: A Sub-Band Gap Approach

    E-Print Network [OSTI]

    Dhara, S

    2015-01-01T23:59:59.000Z

    In a proposed book chapter surface plasmon polariton assisted optical switching in noble metal nanoparticle systems is discussed in the sub-band gap formalism.

  3. Fact #850: December 8, 2014 Automatic Transmissions have closed the Fuel Economy Gap with Manual Transmissions- Dataset

    Broader source: Energy.gov [DOE]

    Excel file with dataset for Fact #850: December 8, 2014 Automatic Transmissions have closed the Fuel Economy Gap with Manual Transmissions

  4. Multi-gap Resistive Plate Chambers as a Time-of-Flight System for the PHENIX Experiment

    SciTech Connect (OSTI)

    Velkovska, Julia [Vanderbilt University] [Vanderbilt University

    2013-12-08T23:59:59.000Z

    In this project a Time-of-Flight detector based on multi-gap resistive plate chambers was built and installed for the PHENIX experiment at RHIC.

  5. RESEARCH ARTICLE Open Access Bridging the gap between gene expression and

    E-Print Network [OSTI]

    , and metabolome data using kinetic models to create a mechanistic link between gene expression and metabolism expression, Kinetic models, Metabolic networks, S. cerevisiae, Transcriptomics, Fluxomics, MetabolomicsRESEARCH ARTICLE Open Access Bridging the gap between gene expression and metabolic phenotype via

  6. High-efficient solar power systems based on thermionic converter with small gap

    SciTech Connect (OSTI)

    Nikolaev, Y.V.; Eryomin, S.A.; Kalmykov, S.S.; Karpechenko, Y.D.; Kucherov, R.Y.; Lapochkin, N.V. [Research Institute of Scientific Industrial Association ``Lutch``, 142100, Podolsk, Moscow Region (Russian Federation)

    1996-03-01T23:59:59.000Z

    Various configurations of power systems based on thermionic converter with small interelectrode gap have been considered. The results of studies of systems energy characteristics are presented. The high efficiency and perspectivety of such systems for different applications have been shown. {copyright} {ital 1996 American Institute of Physics.}

  7. Glass Transition and the Coulomb Gap in Electron Glasses M. Muller and L. B. Ioffe

    E-Print Network [OSTI]

    Müller, Markus

    Glass Transition and the Coulomb Gap in Electron Glasses M. Mu¨ller and L. B. Ioffe Department December 2004) We establish the connection between the presence of a glass phase and the appearance correlations in a systematic way, we show that in the case of strong disorder a continuous glass transition

  8. Constraining the nuclear pairing gap with pairing vibrations M. Grasso,1

    E-Print Network [OSTI]

    Boyer, Edmond

    Constraining the nuclear pairing gap with pairing vibrations E. Khan,1 M. Grasso,1 and J. Margueron. Using the same pairing interaction in nuclear matter and in Tin nuclei, the range of densities where I. INTRODUCTION Studies on pairing effects in both nuclear matter and fi- nite nuclei have known

  9. Working Nine to Five: Economic Impacts on the Gender Gap in Macro Politics .

    E-Print Network [OSTI]

    Scott, Holly Katherine

    2013-09-28T23:59:59.000Z

    ways, which lead to a dynamic policy preference gap between genders. I test the impact of economic differences created by careers in “gender divisive,” or male dominated and non-male dominated industries on the differences between men and women’s policy...

  10. PHYSICAL REVIEW B 84, 155438 (2011) Tunable graphene band gaps from superstrate-mediated interactions

    E-Print Network [OSTI]

    Hague, Jim

    2011-01-01T23:59:59.000Z

    , and photovoltaics through the relatively simple application of polarizable materials such as SiO2 and Si3N4. DOI: 10, light-emitting diodes (LEDs), photovoltaics, heterojunctions, and photodetectors. Here, I investigate gap-enhancement effects due to inter- actions mediated through superstrates placed on graphene systems

  11. Flying over the Reality Gap: From Simulated to Real Indoor Airships

    E-Print Network [OSTI]

    Floreano, Dario

    Flying over the Reality Gap: From Simulated to Real Indoor Airships Jean-Christophe Zufferey-Christophe.Zufferey@epfl.ch Abstract Because of their ability to naturally float in the air, indoor airships (often called blimps) con physics-based dynamic modelling of indoor airships including a pragmatic methodology for parameter

  12. Mining Probabilistic Frequent Spatio-Temporal Sequential Patterns with Gap Constraints from Uncertain Databases

    E-Print Network [OSTI]

    Pei, Jian

    discovery in ecology [11]. The main computational challenge in mining spatio- temporal sequential patternsMining Probabilistic Frequent Spatio-Temporal Sequential Patterns with Gap Constraints from in much interest in itemset mining for uncertain transaction databases. In this paper, we focus on pattern

  13. 1364 Brief Communication Gap junction protein connexin-43 interacts directly with

    E-Print Network [OSTI]

    Mullen, Sean P.

    Increasing evidence indicates that gap-junctional Cx43 ismediate intercellular communication-terminal tail of connexin-43 (Cx43), the phorylate the Cx43 C-terminal tail (CT) via SH2 and SH3 domain in the regulation of Cx43 channel C-terminal residues of Cx43 interact with the second PDZ domain of the Zona

  14. Optical gain from the direct gap transition of Ge-on-Si at room temperature

    E-Print Network [OSTI]

    Liu, Jifeng

    We report direct band gap optical gain of tensile strained n+ epitaxial Ge-on-Si at room temperature, which confirms that band-engineered Ge-on-Si is a promising gain medium for monolithic optical amplifiers and lasers on Si.

  15. Quantifying the gap between embedded control models and time-triggered implementations

    E-Print Network [OSTI]

    Pappas, George J.

    Quantifying the gap between embedded control models and time-triggered implementations Hakan the controller design is complete, the designed controller model is typically expressed as a set of control control components to exe- cutable code introduces errors due to a variety of factors

  16. Partial frequency band gap in one-dimensional magnonic crystals M. Kostylev,1,a

    E-Print Network [OSTI]

    Adeyeye, Adekunle

    approach. It is shown that, due to the one-dimensional artificial periodicity of the medium, the gaps with the artificial spatial periodicity of the structure. In this work, by measuring the frequencies of collective on a silicon substrate using deep ultraviolet lithography with 248 nm exposure wavelength followed by a lift

  17. BETA DECAY STUDIES OF 69Ni AND 58V: DEVELOPMENT OF SUBSHELL GAPS WITHIN THE

    E-Print Network [OSTI]

    Mantica, Paul F.

    BETA DECAY STUDIES OF 69Ni AND 58V: DEVELOPMENT OF SUBSHELL GAPS WITHIN THE N = 28 - 50 SHELL of the requirements for the Degree of DOCTOR OF PHILOSOPHY Department of Chemistry 2001 #12;ABSTRACT BETA DECAY for neutron-rich nuclides within the N = 28 ; 50 shell were investigated. A conventional beta detection system

  18. TABLE OF CONTENTS A Combinatorial Explosion | Cross-Disciplinary Approach Bridges Gaps to New Frontiers 4

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    Gaps to New Frontiers 4 Bending Beams and Extending the Laws of Physics to Focus Electromagnetic Waves with Unparalleled Precision 6 Revolution Evolution On The Net | Harnessing Network Dynamics for a Better Tomorrow 8 with innovative research ideas and projects. This creative energy, in turn, benefits our undergraduate program

  19. Li Reaction Behavior of GaP Nanoparticles Prepared by a Sodium Naphthalenide Reduction Method

    E-Print Network [OSTI]

    Cho, Jaephil

    chemistry.1-21 Cheon et al. recently synthesized wurtzite and zinc blende structured GaP nanorods.1 to the wurtzite structure. They proposed that the formation of a zinc blende structure was favored with highly steric ligands, such as trioctylamine, while wurtzite was dominant when a less bulky alkyl amine was used

  20. Surface multi-gap vector solitons Ivan L. Garanovich, Andrey A. Sukhorukov, and Yuri S. Kivshar

    E-Print Network [OSTI]

    binding on crystal surfaces," Z. Phys. 76, 849­850 (1932). 3. P. Yeh, A. Yariv, and C. S. Hong). 4. P. Yeh, A. Yariv, and A. Y. Cho, "Optical surface waves in periodic layered media," Appl. PhysSurface multi-gap vector solitons Ivan L. Garanovich, Andrey A. Sukhorukov, and Yuri S. Kivshar

  1. New Reconfigurable Power Divider Based on Radial Waveguide and Cylindrical Electromagnetic Band Gap Structure for Low

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Structure for Low Power and Low Cost Smart Antenna Systems Halim Boutayeb, Paul Watson and Toby Kemp AntennaNew Reconfigurable Power Divider Based on Radial Waveguide and Cylindrical Electromagnetic Band Gap halim.boutayeb@huawei.com Abstract--A new low power and low cost technique is proposed for designing

  2. Effects of gaps in adhesives that bond elastically deformed panels to parabolic, cylindrical substructures

    SciTech Connect (OSTI)

    Wilson, R.K.; Reuter, R.C. Jr.

    1982-03-01T23:59:59.000Z

    In previous studies of the mechanical behavior of line focusing solar collectors, the reflective surface panel was modeled as a thin, initially flat, elastic plate that underwent large displacements to attain the shape of a prescribed parabolic cylinder. Attention was focused upon the stresses that developed in an adhesive layer which bonded the deformed panel to a rigid, parabolic substructure. Among the myriad possible collector designs, some possess longitudinally oriented, hollow ribs or corrugations in the substructure which interrupt the transverse continuity of the bond line between the deformed panel and the substructure. Thus, finite gaps in the adhesive are present which create regions where the panel surface becomes intermittently supported. The presence of these gaps perturbs the otherwise smooth distribution of adhesive contact stresses and it is the analytical modeling of this behavior that is the subject of the present report. In particular, attention is devoted to gaps which overlap with the edge effect zone - a region near the rim or vertex of the deformed panel where, in the absence of uniform edge loads necessary to maintain a true parabolic shape, high stresses and associated deformations occur. Significant influences of the gap size and position in the edge effect zone are demonstrated and discussed.

  3. Emergence and evolution of learning gaps across countries: Linked panel evidence from Ethiopia, India, Peru and

    E-Print Network [OSTI]

    Bandyopadhyay, Antar

    Emergence and evolution of learning gaps across countries: Linked panel evidence from Ethiopia unique child-level panel data from Ethiopia, India, Peru and Vietnam with identical tests administered, prior to school enrolment, with children in Vietnam at the upper end, children in Ethiopia at the lower

  4. Exploiting pattern transformation to tune phononic band gaps in a two-dimensional granular crystal

    E-Print Network [OSTI]

    ) cylinders is investigated numerically. This system was previously shown to undergo a pattern transformation with uniaxial compression by Go¨ncu¨ et al. [Soft Matter 7, 2321 (2011)]. The dispersion relations, or elastic waves in certain frequency ranges known as band gaps is an important feature of these materials

  5. Zero Duality Gap in Optimal Power Flow Problem Javad Lavaei and Steven H. Low

    E-Print Network [OSTI]

    Low, Steven H.

    power flow (OPF) problem deals with finding an optimal operating point of a power system that mini1 Zero Duality Gap in Optimal Power Flow Problem Javad Lavaei and Steven H. Low Abstract--The optimal power flow (OPF) problem is nonconvex and generally hard to solve. In this paper, we propose

  6. Access Control Hygiene and the Empathy Gap in Medical IT Yifei Wang Sean Smith Andrew Gettinger

    E-Print Network [OSTI]

    Access Control Hygiene and the Empathy Gap in Medical IT Yifei Wang Sean Smith Andrew Gettinger the enterprise and clinicians to regulatory and legal punishments). Access Control Hygiene In computer security passwords, post-it notes, and other circumvention. One researcher termed this the access control hygiene

  7. Access Control Hygiene and the Empathy Gap in Medical IT Yifei Wang Sean Smith Andrew Gettinger

    E-Print Network [OSTI]

    Smith, Sean W.

    Access Control Hygiene and the Empathy Gap in Medical IT Yifei Wang Sean Smith Andrew Gettinger). Access Control Hygiene In computer security, access control addresses the problem of who can do what this the access control hygiene problem [2]. As literature reports (e.g., [8]) and as we have seen in our own

  8. Making the Right Moves: Guiding Alpha-Expansion using Local Primal-Dual Gaps

    E-Print Network [OSTI]

    Rajamani, Sriram K.

    Making the Right Moves: Guiding Alpha-Expansion using Local Primal-Dual Gaps Dhruv Batra Toyota@microsoft.com Abstract This paper presents a new adaptive graph-cut based move-making algorithm for energy minimization-space to search over. At each step, it tries to greedily find the move-space that will lead to biggest de- crease

  9. OEP Terminal and CONUS Weather Radar Coverage Gap Identification Analysis for NextGen

    E-Print Network [OSTI]

    Cho, John Y. N.

    iii OEP Terminal and CONUS Weather Radar Coverage Gap Identification Analysis for NextGen April 2-density terminal airspace, we focused on this domain with the 35 Operational Evolution Plan (OEP) airports acting as proxy for the yet-to-be-determined list of super-density terminals. We also analyzed, to a lesser extent

  10. Band gap structure modification of amorphous anodic Al oxide film by Ti-alloying

    SciTech Connect (OSTI)

    Canulescu, S., E-mail: stec@fotonik.dtu.dk; Schou, J. [Department of Photonics Engineering, Technical University of Denmark, 4000 Roskilde (Denmark); Rechendorff, K.; Pleth Nielsen, L. [Danish Technological Institute, Kongsvang Alle 29, 8000 Aarhus (Denmark); Borca, C. N. [Paul Scherrer Institute, 5232 Villigen (Switzerland); Jones, N. C.; Hoffmann, S. V. [ISA, Department of Physics and Astronomy, Aarhus University, 8000 Aarhus (Denmark); Bordo, K.; Ambat, R. [Department of Mechanical Engineering, Technical University of Denmark, 2800 Kongens Lyngby (Denmark)

    2014-03-24T23:59:59.000Z

    The band structure of pure and Ti-alloyed anodic aluminum oxide has been examined as a function of Ti concentration varying from 2 to 20 at.?%. The band gap energy of Ti-alloyed anodic Al oxide decreases with increasing Ti concentration. X-ray absorption spectroscopy reveals that Ti atoms are not located in a TiO{sub 2} unit in the oxide layer, but rather in a mixed Ti-Al oxide layer. The optical band gap energy of the anodic oxide layers was determined by vacuum ultraviolet spectroscopy in the energy range from 4.1 to 9.2?eV (300–135?nm). The results indicate that amorphous anodic Al{sub 2}O{sub 3} has a direct band gap of 7.3?eV, which is about ?1.4?eV lower than its crystalline counterpart (single-crystal Al{sub 2}O{sub 3}). Upon Ti-alloying, extra bands appear within the band gap of amorphous Al{sub 2}O{sub 3}, mainly caused by Ti 3d orbitals localized at the Ti site.

  11. A method to bridge the gap between affordance formalisation and visual simulation in virtual environment

    E-Print Network [OSTI]

    Frénod, Emmanuel

    of the emergence of interaction between a human or animal agent and some relevant patterns of sensorial informationA method to bridge the gap between affordance formalisation and visual simulation in virtual to a concrete simulation of the model within a Virtual Environment. This simulation makes the direct observation

  12. Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jrmie Dumas

    E-Print Network [OSTI]

    Lévy, Bruno

    Bridging the Gap: Automated Steady Scaffoldings for 3D Printing Jérémie Dumas Université de Figure 1: The upper leg of the Poppy robot (www.poppy-project.org) cannot be 3D printed on low cost FDM usage. Abstract Fused Filament Fabrication (FFF) is the process of 3D printing ob- jects from melted

  13. Daily Thermal Predictions of the AGR-1 Experiment with Gas Gaps Varying with Time

    SciTech Connect (OSTI)

    Grant Hawkes; James Sterbentz; John Maki; Binh Pham

    2012-06-01T23:59:59.000Z

    A new daily as-run thermal analysis was performed at the Idaho National Laboratory on the Advanced Gas Reactor (AGR) test experiment number one at the Advanced Test Reactor (ATR). This thermal analysis incorporates gas gaps changing with time during the irradiation experiment. The purpose of this analysis was to calculate the daily average temperatures of each compact to compare with experimental results. Post irradiation examination (PIE) measurements of the graphite holder and fuel compacts showed the gas gaps varying from the beginning of life. The control temperature gas gap and the fuel compact – graphite holder gas gaps were linearly changed from the original fabrication dimensions, to the end of irradiation measurements. A steady-state thermal analysis was performed for each daily calculation. These new thermal predictions more closely match the experimental data taken during the experiment than previous analyses. Results are presented comparing normalized compact average temperatures to normalized log(R/B) Kr-85m. The R/B term is the measured release rate divided by the predicted birth rate for the isotope Kr-85m. Correlations between these two normalized values are presented.

  14. National Poverty Center Working Paper Series The Black-White Test Score Gap

    E-Print Network [OSTI]

    Shyy, Wei

    National Poverty Center Working Paper Series #05-09 June 2005 The Black-White Test Score Gap This paper is available online at the National Poverty Center Working Paper Series index at: http of the author(s) and do not necessarily reflect the view of the National Poverty Center or any sponsoring agency

  15. The Electrical and Band-Gap Properties of Amorphous Zinc-Indium-Tin Oxide Thin Films

    E-Print Network [OSTI]

    Shahriar, Selim

    MRSEC The Electrical and Band-Gap Properties of Amorphous Zinc-Indium-Tin Oxide Thin Films D Science & Engineering Center For zinc-indium-tin oxide (ZITO) films, grown by pulsed-laser deposition was replaced by substitution with zinc and tin in equal molar proportions (co-substitution). All ZITO films

  16. The Influence of Caregiver-Child Acculturation Gap on Mexican American Adolescents' Depression and Suicidality

    E-Print Network [OSTI]

    Piña-Watson, Brandy Michelle

    2014-05-27T23:59:59.000Z

    acculturation gaps have on caregiver-child connectedness and conflict, depression and suicidality for Mexican American adolescents. Data was collected on 524 Mexican American adolescents (46.9% male; 53.1% female) ranging from 14 to 20 years (M = 16.23 years; SD...

  17. Color-Superconducting Gap in the Presence of a Magnetic Field

    E-Print Network [OSTI]

    Efrain J. Ferrer; Vivian de la Incera; Cristina Manuel

    2006-05-17T23:59:59.000Z

    We explore the effects of an external magnetic field in the structure and magnitude of the diquark condensate in a three massless quark flavor color superconductor. It is shown that the long-range component $\\widetilde{B}$ of the external magnetic field that penetrates the color-flavor locked (CFL) phase modifies its gap structure, producing a new phase of lower symmetry. Our analysis is performed within an NJL effective field theory with four-fermion interactions, inspired by one-gluon exchange. Using Ritus' method, we compute the quark propagators in the presence of a background magnetic field, and derive the gap equations for arbitrary values of the field. An analytical solution is found for strong magnetic fields. A main outcome of our study is that the $\\widetilde{B}$ field tends to strengthen the gaps that get contributions from pairs of $\\widetilde{Q}$-charged quarks. These gaps are enhanced through the field-dependent density of states of the $\\widetilde{Q}$-charged quarks on the Fermi surface. Our considerations are relevant for the study of highly magnetized compact stars.

  18. Plasma process-induced band-gap modifications of a strained SiGe heterostructure

    E-Print Network [OSTI]

    Misra, Durgamadhab "Durga"

    Plasma process-induced band-gap modifications of a strained SiGe heterostructure P. K. Swain,a) S the strain of coherently strained SiGe. This work investigates the change in valence-band discontinuity in plasma-exposed SiGe films due to strain relaxation by a capacitance­voltage (C­V) profiling technique

  19. KNOWLEDGE GAPS IN APPLYING CONDENSATION CALCULATIONS TO CHONDRITES. L. Grossman (yosi@uchicago.edu)

    E-Print Network [OSTI]

    Grossman, Lawrence

    solar nebula predict the first condensates from a cooling nebular gas to be corundum, hibonite (CaAl12O predicted to condense directly from the solar nebular gas would have the Al, Ti 3+ or Ti 4+ contentsKNOWLEDGE GAPS IN APPLYING CONDENSATION CALCULATIONS TO CHONDRITES. L. Grossman (yosi

  20. The gap in term of mobility for disabled travellers in France DEJOUX, Virginie; ARMOOGUM, Jimmy

    E-Print Network [OSTI]

    Boyer, Edmond

    The gap in term of mobility for disabled travellers in France DEJOUX, Virginie; ARMOOGUM, Jimmy 12 Verte 93166 Noisy le grand cedex Telephone: 33 1 45 92 55 88 virginie.dejoux@inrets.fr ARMOOGUM Jimmy cedex Telephone: 33 1 45 92 55 79 jimmy.armoogum@inrets.fr ABSTRACT The demographic and social changes

  1. Summary of Gaps and Barriers for Implementing Residential Building Energy Efficiency Strategies

    SciTech Connect (OSTI)

    Not Available

    2010-08-01T23:59:59.000Z

    This report presents the key gaps and barriers to implementing residential energy efficiency strategies in the U.S. market, as identified in sessions at the U.S. Department of Energy's Building America 2010 Residential Energy Efficiency Meeting held in Denver, Colorado, on July 20-22, 2010.

  2. Using Process Mining to Bridge the Gap between BI and BPM

    E-Print Network [OSTI]

    van der Aalst, Wil

    offer mature data mining capabilities, and even the tools that do so, are not process-centric, i, and other data attributes (e.g., the size of an order). #12;Typically, three types of process mining canUsing Process Mining to Bridge the Gap between BI and BPM Wil van der Aalst Eindhoven University

  3. Measurement of the direct energy gap of coherently strained SnxGe1x Ge,,001... heterostructures

    E-Print Network [OSTI]

    Atwater, Harry

    Measurement of the direct energy gap of coherently strained SnxGe1Àx ÕGe,,001... heterostructures The direct energy gap has been measured for coherently strained SnxGe1 x alloys on Ge 001 substrates with 0 for coherently strained SnxGe1 x alloys indicates a large alloy contribution and a small strain contribution

  4. A simple high-voltage high current spark gap with subnanosecond jitter triggered by femtosecond laser filamentation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 A simple high-voltage high current spark gap with subnanosecond jitter triggered by femtosecond and able to switch currents in excess of 10 kA with sub-nanosecond jitter. The spark gap is remotely with a nanosecond jitter time2-7 . The jitter could be reduced to hundred of picoseconds with a SF6 filled cell8

  5. PHYSICAL REVIEW B 83, 104511 (2011) Superconducting energy gap in MgCNi3 single crystals: Point-contact spectroscopy

    E-Print Network [OSTI]

    Boyer, Edmond

    2011-01-01T23:59:59.000Z

    PHYSICAL REVIEW B 83, 104511 (2011) Superconducting energy gap in MgCNi3 single crystals: Point Center for Superconductivity, Sogang University, Seoul 100-611, Republic of Korea (Received 14 December that a superconducting energy gap is fully open on the whole Fermi surface, in agreement with our previous magnetic

  6. the ultrasonic methods find the width of a gap by measuring the time needed for a high frequency

    E-Print Network [OSTI]

    Kosmopoulos, Dimitrios I.

    of the measurement is high and there is no risk of damaging the product since the measurement is non- contact in the production process can be identi®ed and corrected as they occur, saving time, energy and labor inspection of gaps. ``Third Dimen- sion Software Ltd.'' [7] has implemented a device called ``Gap Gun

  7. Firm Affiliate Event Details

    E-Print Network [OSTI]

    Shahriar, Selim

    Lightning Tenneco Inc. TreeHouse Foods, Inc. Attendee Profile 2013 Corporate Counsel Institute Contact Peter

  8. Engineering direct-indirect band gap transition in wurtzite GaAs nanowires through size and uniaxial strain

    E-Print Network [OSTI]

    Copple, Andrew; Peng, Xihong; 10.1063/1.4718026

    2012-01-01T23:59:59.000Z

    Electronic structures of wurtzite GaAs nanowires in the [0001] direction were studied using first-principles calculations. It was found that the band gap of GaAs nanowires experience a direct-to-indirect transition when the diameter of the nanowires is smaller than ~28 {\\AA}. For those thin GaAs nanowires with an indirect band gap, it was found that the gap can be tuned to be direct if a moderate external uniaxial strain is applied. Both tensile and compressive strain can trigger the indirect-to-direct gap transition. The critical strains for the gap-transition are determined by the energy crossover of two states in conduction bands.

  9. Digital Book Showcases Washington Wind Project

    Broader source: Energy.gov [DOE]

    "The New American Farm" chronicles the stages of the Windy Flats/Windy Point project, from prospecting to harvest.

  10. Band gap tuning in transition metal oxides by site-specific substitution

    DOE Patents [OSTI]

    Lee, Ho Nyung; Chisholm, Jr., Matthew F; Jellison, Jr., Gerald Earle; Singh, David J; Choi, Woo Seok

    2013-12-24T23:59:59.000Z

    A transition metal oxide insulator composition having a tuned band gap includes a transition metal oxide having a perovskite or a perovskite-like crystalline structure. The transition metal oxide includes at least one first element selected form the group of Bi, Ca, Ba, Sr, Li, Na, Mg, K, Pb, and Pr; and at least one second element selected from the group of Ti, Al, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Ru, Rh, Hf, Ta, W, Re, Os, Ir, and Pt. At least one correlated insulator is integrated into the crystalline structure, including REMO.sub.3, wherein RE is at least one Rare Earth element, and wherein M is at least one element selected from the group of Co, V, Cr, Ni, Mn, and Fe. The composition is characterized by a band gap of less of 4.5 eV.

  11. Evolution of the N=50 shell gap energy towards $^{78}$Ni

    E-Print Network [OSTI]

    J. Hakala; S. Rahaman; V. -V. Elomaa; T. Eronen; U. Hager; A. Jokinen; A. Kankainen; I. D. Moore; H. Penttilä; S. Rinta-Antila; J. Rissanen; A. Saastamoinen; T. Sonoda; C. Weber; J. Äystö

    2008-06-27T23:59:59.000Z

    Atomic masses of the neutron-rich isotopes $^{76-80}$Zn, $^{78-83}$Ga, $^{80-85}Ge, $^{81-87}$As and $^{84-89}$Se have been measured with high precision using the Penning trap mass spectrometer JYFLTRAP at the IGISOL facility. The masses of $^{82,83}$Ga, $^{83-85}$Ge, $^{84-87}$As and $^{89}$Se were measured for the first time. These new data represent a major improvement in the knowledge of the masses in this neutron-rich region. Two-neutron separation energies provide evidence for the reduction of the N=50 shell gap energy towards germanium Z=32 and a subsequent increase at gallium (Z=31). The data are compared with a number of theoretical models. An indication of the persistent rigidity of the shell gap towards nickel (Z=28) is obtained.

  12. Singlet-Triplet Energy Gaps for Diradicals from Fractional-Spin Density-Functional Theory

    SciTech Connect (OSTI)

    Ess, Daniel H.; Johnson, E R; Hu, Xiangqian; Yang, W T

    2011-01-01T23:59:59.000Z

    Open-shell singlet diradicals are difficult to model accurately within conventional Kohn?Sham (KS) density-functional theory (DFT). These methods are hampered by spin contamination because the KS determinant wave function is neither a pure spin state nor an eigenfunction of the S2 operator. Here we present a theoretical foray for using single-reference closed-shell ground states to describe diradicals by fractional-spin DFT (FS-DFT). This approach allows direct, self-consistent calculation of electronic properties using the electron density corresponding to the proper spin eigenfunction. The resulting FS-DFT approach is benchmarked against diradical singlet?triplet gaps for atoms and small molecules. We have also applied FS-DFT to the singlet?triplet gaps of hydrocarbon polyacenes.

  13. Laboratory Studies on Surface Sampling of Bacillus anthracis Contamination: Summary, Gaps, and Recommendations

    SciTech Connect (OSTI)

    Piepel, Gregory F.; Amidan, Brett G.; Hu, Rebecca

    2011-11-28T23:59:59.000Z

    This report summarizes previous laboratory studies to characterize the performance of methods for collecting, storing/transporting, processing, and analyzing samples from surfaces contaminated by Bacillus anthracis or related surrogates. The focus is on plate culture and count estimates of surface contamination for swab, wipe, and vacuum samples of porous and nonporous surfaces. Summaries of the previous studies and their results were assessed to identify gaps in information needed as inputs to calculate key parameters critical to risk management in biothreat incidents. One key parameter is the number of samples needed to make characterization or clearance decisions with specified statistical confidence. Other key parameters include the ability to calculate, following contamination incidents, the (1) estimates of Bacillus anthracis contamination, as well as the bias and uncertainties in the estimates, and (2) confidence in characterization and clearance decisions for contaminated or decontaminated buildings. Gaps in knowledge and understanding identified during the summary of the studies are discussed and recommendations are given for future studies.

  14. Bridging a gap between continuum-QCD and ab initio predictions of hadron observables

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

    Binosi, Daniele; Chang, Lei; Papavassiliou, Joannis; Roberts, Craig D.

    2015-03-01T23:59:59.000Z

    Within contemporary hadron physics there are two common methods for determining the momentum- dependence of the interaction between quarks: the top-down approach, which works toward an ab initio computation of the interaction via direct analysis of the gauge-sector gap equations; and the bottom-up scheme, which aims to infer the interaction by fitting data within a well-defined truncation of those equations in the matter sector that are relevant to bound-state properties. We unite these two approaches by demonstrating that the renormalisation-group-invariant running-interaction predicted by contemporary analyses of QCD’s gauge sector coincides with that required in order to describe ground-state hadron observablesmore »using a nonperturbative truncation of QCD’s Dyson–Schwinger equations in the matter sector. This bridges a gap that had lain between nonperturbative continuum-QCD and the ab initio prediction of bound-state properties.« less

  15. Fabrication of Ceramic Layer-by-Layer Infrared Wavelength Photonic Band Gap Crystals

    SciTech Connect (OSTI)

    Henry Hao-Chuan Kang

    2004-12-19T23:59:59.000Z

    Photonic band gap (PBG) crystals, also known as photonic crystals, are periodic dielectric structures which form a photonic band gap that prohibit the propagation of electromagnetic (EM) waves of certain frequencies at any incident angles. Photonic crystals have several potential applications including zero-threshold semiconductor lasers, the inhibition of spontaneous emission, dielectric mirrors, and wavelength filters. If defect states are introduced in the crystals, light can be guided from one location to another or even a sharp bending of light in micron scale can be achieved. This generates the potential for optical waveguide and optical circuits, which will contribute to the improvement in the fiber-optic communications and the development of high-speed computers.

  16. The refractive index and electronic gap of water and ice increase with increasing pressure

    E-Print Network [OSTI]

    Pan, Ding; Galli, Giulia

    2014-01-01T23:59:59.000Z

    Determining the electronic and dielectric properties of water at high pressure and temperature is an essential prerequisite to understand the physical and chemical properties of aqueous environments under supercritical conditions, e.g. in the Earth interior. However optical measurements of compressed ice and water remain challenging and it has been common practice to assume that their band gap is inversely correlated to the measured refractive index, consistent with observations reported for hundreds of materials. Here we report ab initio molecular dynamics and electronic structure calculations showing that both the refractive index and the electronic gap of water and ice increase with pressure, at least up to 30 GPa. Subtle electronic effects, related to the nature of interband transitions and band edge localization under pressure, are responsible for this apparently anomalous behavior.

  17. Marginal Extended Perturbations in Two Dimensions and Gap-Exponent Relations

    E-Print Network [OSTI]

    L. Turban; B. Berche

    1997-09-11T23:59:59.000Z

    The most general form of a marginal extended perturbation in a two-dimensional system is deduced from scaling considerations. It includes as particular cases extended perturbations decaying either from a surface, a line or a point for which exact results have been previously obtained. The first-order corrections to the local exponents, which are functions of the amplitude of the defect, are deduced from a perturbation expansion of the two-point correlation functions. Assuming covariance under conformal transformation, the perturbed system is mapped onto a cylinder. Working in the Hamiltonian limit, the first-order corrections to the lowest gaps are calculated for the Ising model. The results confirm the validity of the gap-exponent relations for the perturbed system.

  18. Effect of topological defects and Coulomb charge on the low energy quantum dynamics of gapped graphene

    E-Print Network [OSTI]

    Baishali Chakraborty; Kumar S. Gupta; Siddhartha Sen

    2012-08-03T23:59:59.000Z

    We study the combined effect of a conical topological defect and a Coulomb charge impurity on the dynamics of Dirac fermions in gapped graphene. Beyond a certain strength of the Coulomb charge, quantum instability sets in, which demarcates the boundary between sub and supercritical values of the charge. In the subcritical regime, for certain values of the system parameters, the allowed boundary conditions in gapped graphene cone can be classified in terms of a single real parameter. We show that the observables such as local density of states, scattering phase shifts and the bound state spectra are sensitive to the value of this real parameter, which is interesting from an empirical point of view. For a supercritical Coulomb charge, we analyze the system with a regularized potential as well as with a zigzag boundary condition and find the effect of the sample topology on the observable features of the system.

  19. Periodic dielectric structure for production of photonic band gap and method for fabricating the same

    DOE Patents [OSTI]

    Ozbay, E.; Tuttle, G.; Michel, E.; Ho, K.M.; Biswas, R.; Chan, C.T.; Soukoulis, C.

    1995-04-11T23:59:59.000Z

    A method is disclosed for fabricating a periodic dielectric structure which exhibits a photonic band gap. Alignment holes are formed in a wafer of dielectric material having a given crystal orientation. A planar layer of elongate rods is then formed in a section of the wafer. The formation of the rods includes the step of selectively removing the dielectric material of the wafer between the rods. The formation of alignment holes and layers of elongate rods and wafers is then repeated to form a plurality of patterned wafers. A stack of patterned wafers is then formed by rotating each successive wafer with respect to the next-previous wafer, and then placing the successive wafer on the stack. This stacking results in a stack of patterned wafers having a four-layer periodicity exhibiting a photonic band gap. 42 figures.

  20. Microclimatic Performance of a Free-Air Warming and CO2 Enrichment Experiment in Windy Wyoming, USA

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

    LeCain, Daniel; Smith, David; Morgan, Jack; Kimball, Bruce A.; Pendall, Elise; Miglietta, Franco; Liang, Wenju

    2015-02-06T23:59:59.000Z

    In order to plan for global changing climate experiments are being conducted in many countries, but few have monitored the effects of the climate change treatments (warming, elevated CO2) on the experimental plot microclimate. During three years of an eight year study with year-round feedback-controlled infra-red heater warming (1.5/3.0°C day/night) and growing season free-air CO2 enrichment (600 ppm) in the mixed-grass prairie of Wyoming, USA, we monitored soil, leaf, canopy-air, above-canopy-air temperatures and relative humidity of control and treated experimental plots and evaluated ecologically important temperature differentials. Leaves were warmed somewhat less than the target settings (1.1 & 1.5°C day/night)more »but soil was warmed more creating an average that matched the target settings extremely well both during the day and night plus the summer and winter. The site typically has about 50% bare or litter covered soil, therefore soil heat transfer is more critical than in dense canopy ecosystems. The Wyoming site commonly has strong winds (5 ms-1 average) and significant daily and seasonal temperature fluctuations (as much as 30°C daily) but the warming system was nearly always able to maintain the set temperatures regardless of abiotic variation. The within canopy-air was only slightly warmed and above canopy-air was not warmed by the system, therefore convective warming was minor. Elevated CO2 had no direct effect nor interaction with the warming treatment on microclimate. Relative humidity within the plant canopy was only slightly reduced by warming. Soil water content was reduced by warming but increased by elevated CO2. This study demonstrates the importance of monitoring the microclimate in manipulative field global change experiments so that critical physiological and ecological conclusions can be determined. Highly variable energy demand fluctuations showed that passive IR heater warming systems will not maintain desired warming for much of the time.« less

  1. Pre-Stressed Viscoelastic Composites: Effective Incremental Moduli and Band-Gap Tuning

    SciTech Connect (OSTI)

    Parnell, William J. [School of Mathematics, Alan Turing Building, University of Manchester, Manchester, M13 9PL (United Kingdom)

    2010-09-30T23:59:59.000Z

    We study viscoelastic wave propagation along pre-stressed nonlinear elastic composite bars. In the pre-stressed state we derive explicit forms for the effective incremental storage and loss moduli with dependence on the pre-stress. We also derive a dispersion relation for the effective wavenumber in the case of arbitrary frequency, hence permitting a study of viscoelastic band-gap tuning via pre-stress.

  2. Wave propagation in ordered, disordered, and nonlinear photonic band gap materials

    SciTech Connect (OSTI)

    Lidorikis, Elefterios

    1999-12-10T23:59:59.000Z

    Photonic band gap materials are artificial dielectric structures that give the promise of molding and controlling the flow of optical light the same way semiconductors mold and control the electric current flow. In this dissertation the author studied two areas of photonic band gap materials. The first area is focused on the properties of one-dimensional PBG materials doped with Kerr-type nonlinear material, while, the second area is focused on the mechanisms responsible for the gap formation as well as other properties of two-dimensional PBG materials. He first studied, in Chapter 2, the general adequacy of an approximate structure model in which the nonlinearity is assumed to be concentrated in equally-spaced very thin layers, or 6-functions, while the rest of the space is linear. This model had been used before, but its range of validity and the physical reasons for its limitations were not quite clear yet. He performed an extensive examination of many aspects of the model's nonlinear response and comparison against more realistic models with finite-width nonlinear layers, and found that the d-function model is quite adequate, capturing the essential features in the transmission characteristics. The author found one exception, coming from the deficiency of processing a rigid bottom band edge, i.e. the upper edge of the gaps is always independent of the refraction index contrast. This causes the model to miss-predict that there are no soliton solutions for a positive Kerr-coefficient, something known to be untrue.

  3. Engineering of the band gap and optical properties of thin films of yttrium hydride

    SciTech Connect (OSTI)

    You, Chang Chuan; Mongstad, Trygve; Maehlen, Jan Petter; Karazhanov, Smagul, E-mail: smagulk@ife.no [Institute for Energy Technology, P.O. Box 40, NO-2027 Kjeller (Norway)

    2014-07-21T23:59:59.000Z

    Thin films of oxygen-containing yttrium hydride show photochromic effect at room temperature. In this work, we have studied structural and optical properties of the films deposited at different deposition pressures, discovering the possibility of engineering the optical band gap by variation of the oxygen content. In sum, the transparency of the films and the wavelength range of photons triggering the photochromic effect can be controlled by variation of the deposition pressure.

  4. Generalized parton distributions and rapidity gap survival in exclusive diffractive pp scattering

    SciTech Connect (OSTI)

    Leonid Frankfurt; Charles Hyde-Wright; Mark Strikman; Christian Weiss

    2007-03-01T23:59:59.000Z

    We propose a new approach to the problem of rapidity gap survival (RGS) in the production of high-mass systems (H = dijet, heavy quarkonium, Higgs boson) in double-gap exclusive diffractive pp scattering, pp-->p + (gap) + H + (gap) + p. It is based on the idea that hard and soft interactions proceed over widely different time- and distance scales and are thus approximately independent. The high-mass system is produced in a hard scattering process with exchange of two gluons between the protons. Its amplitude is calculable in terms of the gluon generalized parton distributions (GPDs) in the protons, which can be measured in J= production in exclusive ep scattering. The hard scattering process is modified by soft spectator interactions, which we calculate in a model-independent way in terms of the pp elastic scattering amplitude. Contributions from inelastic intermediate states are suppressed. A simple geometric picture of the interplay of hard and soft interactions in diffraction is obtained. The onset of the black-disk limit in pp scattering at TeV energies strongly suppresses diffraction at small impact parameters and is the main factor in determining the RGS probability. Correlations between hard and soft interactions (e.g. due to scattering from the long-range pion field of the proton, or due to possible short-range transverse correlations between partons) further decrease the RGS probability. We also investigate the dependence of the diffractive cross section on the transverse momenta of the final-state protons (''diffraction pattern''). By measuring this dependence one can perform detailed tests of the interplay of hard and soft interactions, and even extract information about the gluon GPD in the proton. Such studies appear to be feasible with the planned forward detectors at the LHC.

  5. Growth and characterization of liquid phase epitaxial GaP layers 

    E-Print Network [OSTI]

    Kao, Yung-Chung

    1982-01-01T23:59:59.000Z

    Inside a High-vacuum Chamber . . . . . . . . . . . . . . . . . . . . . . . 3 3. Cross Section of Multi-well Sliding Graphite Boat. Solubility Curve of P in Ga Melt 5. Apparatus of LPE Growth by Tipping Method. 10 Dipping System Schematic for LPE... Growth. 10 7. Sliding Boat System Block Diagram for LPE Growth 12 Temperature Profile Along the Graphite Boat. 13 9. Disassembled Graphite Boat for Multi-layer LPE Growth. . . 14 10. Ga-P Phase Diagram 17 Solution Cooling Procedure for Three...

  6. Local droplet etching – Nanoholes, quantum dots, and air-gap heterostructures

    SciTech Connect (OSTI)

    Heyn, Ch.; Sonnenberg, D.; Graf, A.; Kerbst, J.; Stemmann, A.; Hansen, W. [Institute of Applied Physics, University of Hamburg, Jungiusstr. 11, 20355 Hamburg (Germany)

    2014-05-15T23:59:59.000Z

    Local droplet etching (LDE) allows the self-organized generation of nanoholes in semiconductor surfaces and is fully compatible with molecular beam epitaxy (MBE). The influence of the process parameters as well as of droplet and substrate materials on the LDE nanohole morphology is discussed. Furthermore, recent applications of LDE, the fabrication of quantum dots by hole filling and the creation of air-gap heterostructures are addressed.

  7. Monte Carlo Studies of the CALICE AHCAL Tiles Gaps and Non-uniformities

    E-Print Network [OSTI]

    Felix Sefkow; Angela Lucaci-Timoce

    2010-06-18T23:59:59.000Z

    The CALICE analog HCAL is a highly granular calorimeter, proposed for the International Linear Collider. It is based on scintillator tiles, read out by silicon photomultipliers (SiPMs). The effects of gaps between the calorimeter tiles, as well as the non-uniform response of the tiles, in view of the impact on the energy resolution, are studied in Monte Carlo events. It is shown that these type of effects do not have a significant influence on the measurement of hadron showers.

  8. Computation of the Field in an Axial Gap, Trapped-Flux Type Superconducting Electric Machine

    E-Print Network [OSTI]

    Shen, Zejun; Ainslie, Mark D.; Campbell, Archie M.; Cardwell, David A.

    2014-11-04T23:59:59.000Z

    Abstract—The Bulk Superconductivity Group at the University of Cambridge is currently investigating the use of high temper- ature superconductors in wire and bulk form to increase the electrical and magnetic loading of an axial gap, trapped flux... electric machines are an importantapplication of superconducting materials in both bulk and wire forms. Bulk high temperature superconductors, in partic- ular, are capable of trapping magnetic fields greater than 17 T below 30 K [1], [2], as well as up to 3...

  9. Band gap tunning in BN-doped graphene systems with high carrier mobility

    SciTech Connect (OSTI)

    Kaloni, T. P.; Schwingenschlögl, U., E-mail: udo.schwingenschlogl@kaust.edu.sa [KAUST, PSE Division, Thuwal 23955-6900 (Saudi Arabia); Joshi, R. P.; Adhikari, N. P. [Central Department of Physics, Tribhuvan University, Kirtipur, Kathmandu (Nepal)

    2014-02-17T23:59:59.000Z

    Using density functional theory, we present a comparative study of the electronic properties of BN-doped graphene monolayer, bilayer, trilayer, and multilayer systems. In addition, we address a superlattice of pristine and BN-doped graphene. Five doping levels between 12.5% and 75% are considered, for which we obtain band gaps from 0.02?eV to 2.43?eV. We demonstrate a low effective mass of the charge carriers.

  10. Reconstruction of nuclear charged fragment trajectories from a large gap sweeper magnet

    E-Print Network [OSTI]

    N. Frank; A. Schiller; D. Bazin; W. A. Peters; M. Thoennessen

    2007-08-29T23:59:59.000Z

    A new method to reconstruct charged fragment four-momentum vectors from measured trajectories behind an open, large gap, magnetic dispersion element (a sweeper magnet) has been developed. In addition to the position and angle behind the magnet it includes the position measurement in the dispersive direction at the target. The method improves the energy and angle resolution of the reconstruction significantly for experiments with fast rare isotopes, where the beam size at the target position is large.

  11. Coexistence and competition of nematic and gapped states in bilayer graphene

    E-Print Network [OSTI]

    E. V. Gorbar; V. P. Gusynin; V. A. Miransky; I. A. Shovkovy

    2012-09-24T23:59:59.000Z

    In bilayer graphene, the phase diagram in the plane of a strain-induced bare nematic term, ${\\cal N}_{0}$, and a top-bottom gates voltage imbalance, $U_{0}$, is obtained by solving the gap equation in the random-phase approximation. At nonzero ${\\cal N}_0$ and $U_0$, the phase diagram consists of two hybrid spin-valley symmetry-broken phases with both nontrivial nematic and mass-type order parameters. The corresponding phases are separated by a critical line of first- and second-order phase transitions at small and large values of ${\\cal N}_0$, respectively. The existence of a critical end point, where the line of first-order phase transitions terminates, is predicted. For ${\\cal N}_0=0$, a pure gapped state with a broken spin-valley symmetry is the ground state of the system. As ${\\cal N}_{0}$ increases, the nematic order parameter increases, and the gap weakens in the hybrid state. For $U_{0}=0$, a quantum second-order phase transition from the hybrid state into a pure gapless nematic state occurs when the strain reaches a critical value. A nonzero $U_{0}$ suppresses the critical value of the strain. The relevance of these results to recent experiments is briefly discussed.

  12. Particle Concentration At Planet Induced Gap Edges and Vortices: I. Inviscid 3-D Hydro Disks

    E-Print Network [OSTI]

    Zhu, Zhaohuan; Rafikov, Roman R; Bai, Xuening

    2013-01-01T23:59:59.000Z

    We perform a systematic study of the dynamics of dust particles in protoplanetary disks with embedded planets using global 2-D and 3-D inviscid hydrodynamic simulations. We implement Lagrangian particles into magnetohydrodynamic code Athena with cylindrical coordinates and explore the behavior of dust grains with sizes spanning more than 6 orders of magnitude --- from the well-coupled to decoupled limits. We find two distinct outcomes depending on the mass of the embedded planet, which is varied between 8 M_earth to 9 M_{J}. In the presence of a low mass planet (8 M_earth), two narrow gaps start to open in the gas on each side of the planet where the density waves shock. Although these gaps are quite shallow, they dramatically affect particle drift speed and cause significant, axisymmetric dust depletion near the planet. On the other hand, a more massive planet (>0.1 M_{J}) carves out a deeper gap with sharp edges, which are unstable to the formation of vortices that later merge into a single vortex. The vort...

  13. ALE3D Simulations of Gap Closure and Surface Ignition for Cookoff Modeling

    SciTech Connect (OSTI)

    Howard, W M; McClelland, M A; Nichols, A L

    2006-06-22T23:59:59.000Z

    We are developing ALE3D models to describe the thermal, chemical and mechanical behavior during the heating, ignition and explosive phases of various cookoff phenomena. The candidate models and numerical strategies are being evaluated using benchmark cookoff experiments. ALE3D is a three-dimensional computer code capable of solving the model equations in a coupled fashion through all the phases of the cookoff in a single calculation. For the cookoff experiments, we are interested in representing behavior on widely varying timescales. We have used an implicit hydrodynamics option during the heating phase and an explicit solution method during the explosive phase. To complicate the modeling problem, high heat fluxes cause rapid temperature increases in boundary layers and lead to the formation of gaps between energetic and structural materials and ignition on surfaces. The initially solid energetic and structural materials react to produce gases, which fill the gaps. These materials can also melt and flow. Since an implicit solution method is used, simple no-strength materials models can no longer be used for liquids and gases. In this paper, we discuss and demonstrate choices of materials models for solid/liquid/gas mixtures to be used in conjunction with the implicit solution method. In addition, results are given for mesh movement strategies applied to the opening, closing, and surface ignition within gaps.

  14. Photonic-band-gap properties for two-component slow light

    SciTech Connect (OSTI)

    Ruseckas, J.; Kudriasov, V.; Juzeliunas, G.; Unanyan, R. G.; Otterbach, J.; Fleischhauer, M. [Institute of Theoretical Physics and Astronomy, Vilnius University, A. Gostauto 12, Vilnius 01108 (Lithuania); Fachbereich Physik and Research Center OPTIMAS, Technische Universitaet Kaiserslautern, Kaiserslautern D-67663 (Germany)

    2011-06-15T23:59:59.000Z

    We consider two-component ''spinor'' slow light in an ensemble of atoms coherently driven by two pairs of counterpropagating control laser fields in a double tripod-type linkage scheme. We derive an equation of motion for the spinor slow light (SSL) representing an effective Dirac equation for a massive particle with the mass determined by the two-photon detuning. By changing the detuning the atomic medium acts as a photonic crystal with a controllable band gap. If the frequency of the incident probe light lies within the band gap, the light experiences reflection from the sample and can tunnel through it. For frequencies outside the band gap, the transmission and reflection probabilities oscillate with the increasing length of the sample. In both cases the reflection takes place into the complementary mode of the probe field. We investigate the influence of the finite excited state lifetime on the transmission and reflection coefficients of the probe light. We discuss possible experimental implementations of the SSL using alkali-metal atoms such as rubidium or sodium.

  15. Localized Excitation in the Hybridization Gap in YbAl{sub 3}

    SciTech Connect (OSTI)

    Christianson, A.D.; Fanelli, V.R. [University of California, Irvine, California 92697 (United States); Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Lawrence, J.M. [University of California, Irvine, California 92697 (United States); Goremychkin, E.A. [Argonne National Laboratory, Argonne, Illinois 60439 (United States); ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX (United Kingdom); Osborn, R. [Argonne National Laboratory, Argonne, Illinois 60439 (United States); Bauer, E.D.; Sarrao, J.L.; Thompson, J.D. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Frost, C.D. [ISIS Facility, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX (United Kingdom); Zarestky, J. L. [Ames Laboratory, Iowa State University, Ames, Iowa 50011 (United States)

    2006-03-24T23:59:59.000Z

    The intermediate valence compound YbAl{sub 3} exhibits a broad magnetic excitation in the inelastic neutron scattering spectrum with characteristic energy E{sub 1}{approx_equal}50 meV, equal to the Kondo energy (T{sub K}{approx}600-700 K). In the low temperature (Tgap that exists in this compound. We report inelastic neutron scattering results for a single-crystal sample. The scattering at energies near E{sub 1} qualitatively has the momentum (Q) dependence expected for interband scattering across the indirect gap. The scattering near E{sub 2} has a very different Q dependence: it is a weak function of Q over a large fraction of the Brillouin zone and is smallest near (1/2,1/2,1/2). A possibility is that the peak at E{sub 2} arises from a spatially localized excitation in the hybridization gap.

  16. Blocking a wave: Frequency band gaps in ice shelves with periodic crevasses

    E-Print Network [OSTI]

    Julian Freed-Brown; Jason M. Amundson; Douglas R. MacAyeal; Wendy W. Zhang

    2011-12-14T23:59:59.000Z

    We assess how the propagation of high-frequency elastic-flexural waves through an ice shelf is modified by the presence of spatially periodic crevasses. Analysis of the normal modes supported by the ice shelf with and without crevasses reveals that a periodic crevasse distribution qualitatively changes the mechanical response. The normal modes of an ice shelf free of crevasses are evenly distributed as a function of frequency. In contrast, the normal modes of a crevasse-ridden ice shelf are distributed unevenly. There are "band gaps", frequency ranges over which no eigenmodes exist. A model ice shelf that is 50 km in lateral extent and 300 m thick with crevasses spaced 500 m apart has a band gap from 0.2 to 0.38 Hz. This is a frequency range relevant for ocean wave/ice-shelf interactions. When the outermost edge of the crevassed ice shelf is oscillated at a frequency within the band gap, the ice shelf responds very differently from a crevasse-free ice shelf. The flexural motion of the crevassed ice shelf is confined to a small region near the outermost edge of the ice shelf and effectively "blocked" from reaching the interior.

  17. Blocking a wave: Frequency band gaps in ice shelves with periodic crevasses

    E-Print Network [OSTI]

    Freed-Brown, Julian; MacAyeal, Douglas R; Zhang, Wendy W

    2011-01-01T23:59:59.000Z

    We assess how the propagation of high-frequency elastic-flexural waves through an ice shelf is modified by the presence of spatially periodic crevasses. Analysis of the normal modes supported by the ice shelf with and without crevasses reveals that a periodic crevasse distribution qualitatively changes the mechanical response. The normal modes of an ice shelf free of crevasses are evenly distributed as a function of frequency. In contrast, the normal modes of a crevasse-ridden ice shelf are distributed unevenly. There are "band gaps", frequency ranges over which no eigenmodes exist. A model ice shelf that is 50 km in lateral extent and 300 m thick with crevasses spaced 500 m apart has a band gap from 0.2 to 0.38 Hz. This is a frequency range relevant for ocean wave/ice-shelf interactions. When the outermost edge of the crevassed ice shelf is oscillated at a frequency within the band gap, the ice shelf responds very differently from a crevasse-free ice shelf. The flexural motion of the crevassed ice shelf is c...

  18. Band gap reduction in GaNSb alloys due to the anion mismatch

    SciTech Connect (OSTI)

    Veal, T.D.; Piper, L.F.J.; Jollands, S.; Bennett, B.R.; Jefferson, P.H.; Thomas, P.A.; McConville, C.F.; Murdin, B.N.; Buckle, L.; Smith, G.W.; Ashley, T. [Department of Physics, University of Warwick, Coventry, CV4 7AL (United Kingdom); School of Electronics and Physical Sciences, University of Surrey, Guildford, GU2 5XH (United Kingdom); QinetiQ Ltd., St. Andrews Road, Malvern, Worcestershire, WR14 3PS (United Kingdom)

    2005-09-26T23:59:59.000Z

    The structural and optoelectronic properties in GaN{sub x}Sb{sub 1-x} alloys (0{<=}x<0.02) grown by molecular-beam epitaxy on both GaSb substrates and AlSb buffer layers on GaAs substrates are investigated. High-resolution x-ray diffraction (XRD) and reciprocal space mapping indicate that the GaN{sub x}Sb{sub 1-x} epilayers are of high crystalline quality and the alloy composition is found to be independent of substrate, for identical growth conditions. The band gap of the GaNSb alloys is found to decrease with increasing nitrogen content from absorption spectroscopy. Strain-induced band-gap shifts, Moss-Burstein effects, and band renormalization were ruled out by XRD and Hall measurements. The band-gap reduction is solely due to the substitution of dilute amounts of highly electronegative nitrogen for antimony, and is greater than observed in GaNAs with the same N content.

  19. Analysis of potential self-guarantee tests for demonstrating financial assurance by non-profit colleges, universities, and hospitals and by business firms that do not issue bonds

    SciTech Connect (OSTI)

    Bailey, P.; Dean, C.; Collier, J.; Dasappa, V.; Goldberg, W. [ICF, Inc., Fairfax, VA (United States)

    1997-06-01T23:59:59.000Z

    The Nuclear Regulatory Commission (NRC) on December 29, 1993, promulgated self-guarantee requirements that materials licensees may use to demonstrate financial assurance for decommissioning costs. However, nonprofit colleges and universities, nonprofit hospitals, and for-profit firms that do not issue bonds are currently precluded, by their unique accounting and financial reporting systems, or by other features of their business practices, from using the financial tests for self-guarantors adopted by the NRC. This Report evaluates several alternative financial tests that might serve as the basis for self-guarantee by these three categories of licensees.

  20. Firm Uses DOEs Fastest Supercomputer to Streamline Long-Haul Trucks | U.S. DOE Office of Science (SC)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField8,Dist.New MexicoFinancing Opportunities forFinishing theParking Lot,Firm

  1. Reduced Expression of the NMDA Receptor-Interacting Protein SynGAP Causes Behavioral Abnormalities that Model

    E-Print Network [OSTI]

    Kalueff, Allan V.

    . SynGAP mutants exhibited enhanced startle reactivity and impaired sensory-motor gating. These mice.1038/npp.2008.223 Keywords: schizophrenia; NMDA receptor; postsynaptic density; plasticity; hyperactivity

  2. IEEE MICROWAVE AND GUIDED WAVE LETTERS, VOL. 7, NO. 10, OCTOBER 1997 329 Air-Gap Stacked Spiral Inductor

    E-Print Network [OSTI]

    Seo, Kwang Seok

    Inductor Seung Won Paek and Kwang Seok Seo Abstract--In this letter, we propose an air-gap stacked spiral and Materials Laboratory, LG Corporate Institute of Technology, Seoul 137-140, Korea. K. S. Seo

  3. Thermal conductivity of the electrode gap of a thermionic converter, filled with inert gases, at low pressures

    SciTech Connect (OSTI)

    Modin, V.A.; Nikolaev, Y.V.

    1985-11-01T23:59:59.000Z

    Experimental data is presented on the thermal conductivity of the electrode gap of a thermionic converter filled with He, Ar, and Xe in the pressure range 40--550 Pa. The need to account for the coefficients of thermal accommodation of the emitter-inert-gas-collector system in this range is shown. The accommodation coefficients for different temperature regimes are measured and expressions are obtained to calculate the heat flux transported by the inert gases in the electrode gap.

  4. RESOLVING THE GAP AND AU-SCALE ASYMMETRIES IN THE PRE-TRANSITIONAL DISK OF V1247 ORIONIS

    SciTech Connect (OSTI)

    Kraus, Stefan; Espaillat, Catherine; Wilner, David J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-78, Cambridge, MA 02138 (United States); Ireland, Michael J. [Department of Physics and Astronomy, Macquarie University, Sydney, NSW 2109 (Australia); Sitko, Michael L.; Swearingen, Jeremy R.; Werren, Chelsea [Department of Physics, University of Cincinnati, Cincinnati, OH 45221 (United States); Monnier, John D.; Calvet, Nuria [Department of Astronomy, University of Michigan, 918 Dennison Building, Ann Arbor, MI 48109 (United States); Grady, Carol A. [Eureka Scientific Inc., Oakland, CA 94602 (United States); Harries, Tim J. [School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom); Hoenig, Sebastian F. [Department of Physics, University of California Santa Barbara, Broida Hall, Santa Barbara, CA 93106 (United States); Russell, Ray W. [The Aerospace Corporation, Los Angeles, CA 90009 (United States)

    2013-05-01T23:59:59.000Z

    Pre-transitional disks are protoplanetary disks with a gapped disk structure, potentially indicating the presence of young planets in these systems. In order to explore the structure of these objects and their gap-opening mechanism, we observed the pre-transitional disk V1247 Orionis using the Very Large Telescope Interferometer, the Keck Interferometer, Keck-II, Gemini South, and IRTF. This allows us to spatially resolve the AU-scale disk structure from near- to mid-infrared wavelengths (1.5-13 {mu}m), tracing material at different temperatures and over a wide range of stellocentric radii. Our observations reveal a narrow, optically thick inner-disk component (located at 0.18 AU from the star) that is separated from the optically thick outer disk (radii {approx}> 46 AU), providing unambiguous evidence for the existence of a gap in this pre-transitional disk. Surprisingly, we find that the gap region is filled with significant amounts of optically thin material with a carbon-dominated dust mineralogy. The presence of this optically thin gap material cannot be deduced solely from the spectral energy distribution, yet it is the dominant contributor at mid-infrared wavelengths. Furthermore, using Keck/NIRC2 aperture masking observations in the H, K', and L' bands, we detect asymmetries in the brightness distribution on scales of {approx}15-40 AU, i.e., within the gap region. The detected asymmetries are highly significant, yet their amplitude and direction changes with wavelength, which is not consistent with a companion interpretation but indicates an inhomogeneous distribution of the gap material. We interpret this as strong evidence for the presence of complex density structures, possibly reflecting the dynamical interaction of the disk material with sub-stellar mass bodies that are responsible for the gap clearing.

  5. Tetracene air-gap single-crystal field-effect transistors Yu Xia, Vivek Kalihari, and C. Daniel Frisbiea

    E-Print Network [OSTI]

    Rogers, John A.

    Tetracene air-gap single-crystal field-effect transistors Yu Xia, Vivek Kalihari, and C. Daniel FETs utilizing an air or vacuum gap as the gate dielectric. The linear mobility of the device can be as high as 1.6 cm2 /V s in air, with a subthreshold slope lower than 0.5 V nF/decade cm2 . By changing

  6. DESIGN, GROWTH, FABRICATION AND CHARACTERIZATION OF HIGH-BAND GAP InGaN/GaN SOLAR CELLS

    E-Print Network [OSTI]

    Honsberg, Christiana

    DESIGN, GROWTH, FABRICATION AND CHARACTERIZATION OF HIGH-BAND GAP InGaN/GaN SOLAR CELLS Omkar Jani1 with a band gap of 2.4 eV or greater. InxGa1-xN is one of a few alloys that can meet this key requirement. InGaN.4 eV. InGaN has the appropriate optical properties and has been well demonstrated for light

  7. Low gap amorphous GaN1-xAsx alloys grown on glass substrate K. M. Yu,1,a

    E-Print Network [OSTI]

    Wu, Junqiao

    Low gap amorphous GaN1-xAsx alloys grown on glass substrate K. M. Yu,1,a S. V. Novikov,2 R September 2010 Amorphous GaN1-xAsx layers with As content in the range of x=0.1 to 0.6 were grown defined optical absorption edges. The measured band gap values for the crystalline and amorphous GaN1-x

  8. Superconducting gap evolution in overdoped BaFe?(As1-xPx)? single crystals through nanocalorimetry

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

    Campanini, D.; Diao, Z.; Fang, L.; Kwok, W.-K.; Welp, U.; Rydh, A.

    2015-06-01T23:59:59.000Z

    We report on specific heat measurements on clean overdoped BaFe?(As1-xPx)? single crystals performed with a high resolution membrane-based nanocalorimeter. A nonzero residual electronic specific heat coefficient at zero temperature ?r=C/T|T?0 is seen for all doping compositions, indicating a considerable fraction of the Fermi surface ungapped or having very deep minima. The remaining superconducting electronic specific heat is analyzed through a two-band s-wave ? model in order to investigate the gap structure. Close to optimal doping we detect a single zero-temperature gap of ??~5.3 me V, corresponding to ??/kBTc ~ 2.2. Increasing the phosphorus concentration x, the main gap reduces tillmore »a value of ?? ~ 1.9 meV for x = 0.55 and a second weaker gap becomes evident. From the magnetic field effect on ?r, all samples however show similar behavior [?r(H) - ?r (H = 0)? Hn, with n between 0.6 and 0.7]. This indicates that, despite a considerable redistribution of the gap weights, the total degree of gap anisotropy does not change drastically with doping.« less

  9. Superconducting gap evolution in overdoped BaFe?(As1-xPx)? single crystals through nanocalorimetry

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

    Campanini, D.; Diao, Z.; Fang, L.; Kwok, W.-K.; Welp, U.; Rydh, A.

    2015-06-01T23:59:59.000Z

    We report on specific heat measurements on clean overdoped BaFe?(As1-xPx)? single crystals performed with a high resolution membrane-based nanocalorimeter. A nonzero residual electronic specific heat coefficient at zero temperature ?r=C/T|T?0 is seen for all doping compositions, indicating a considerable fraction of the Fermi surface ungapped or having very deep minima. The remaining superconducting electronic specific heat is analyzed through a two-band s-wave ? model in order to investigate the gap structure. Close to optimal doping we detect a single zero-temperature gap of ??~5.3 me V, corresponding to ??/kBTc ~ 2.2. Increasing the phosphorus concentration x, the main gap reduces till a value of ?? ~ 1.9 meV for x = 0.55 and a second weaker gap becomes evident. From the magnetic field effect on ?r, all samples however show similar behavior [?r(H) - ?r (H = 0)? Hn, with n between 0.6 and 0.7]. This indicates that, despite a considerable redistribution of the gap weights, the total degree of gap anisotropy does not change drastically with doping.

  10. Technical Barriers, Gaps, and Opportunities Related to Home Energy Upgrade Market Delivery

    SciTech Connect (OSTI)

    Bianchi, M. V. A.

    2011-11-01T23:59:59.000Z

    This report outlines the technical barriers, gaps, and opportunities that arise in executing home energy upgrade market delivery approaches, as identified through research conducted by the U.S. Department of Energy's Building America program. The objective of this report is to outline the technical1 barriers, gaps, and opportunities that arise in executing home energy upgrade market delivery approaches, as identified through research conducted by the U.S. Department of Energy's (DOE) Building America program. This information will be used to provide guidance for new research necessary to enable the success of the approaches. Investigation for this report was conducted via publications related to home energy upgrade market delivery approaches, and a series of interviews with subject matter experts (contractors, consultants, program managers, manufacturers, trade organization representatives, and real estate agents). These experts specified technical barriers and gaps, and offered suggestions for how the technical community might address them. The potential benefits of home energy upgrades are many and varied: reduced energy use and costs; improved comfort, durability, and safety; increased property value; and job creation. Nevertheless, home energy upgrades do not comprise a large part of the overall home improvement market. Residential energy efficiency is the most complex climate intervention option to deliver because the market failures are many and transaction costs are high (Climate Change Capital 2009). The key reasons that energy efficiency investment is not being delivered are: (1) The opportunity is highly fragmented; and (2) The energy efficiency assets are nonstatus, low-visibility investments that are not properly valued. There are significant barriers to mobilizing the investment in home energy upgrades, including the 'hassle factor' (the time and effort required to identify and secure improvement works), access to financing, and the opportunity cost of capital and split incentives.

  11. Large Gap Size Paired-end Library Construction for Second Generation Sequencing

    SciTech Connect (OSTI)

    Peng, Ze; Hamilton, Matthew; Froula, Jeff; Ewing, Aren; Foster, Brian; Cheng, Jan-Fang

    2010-05-28T23:59:59.000Z

    Fosmid or BAC end sequencing plays an important role in de novo assembly of large genomes like fungi and plants. However construction and Sanger sequencing of fosmid or BAC libraries are laborious and costly. The current 454 Paired-End (PE) Library and Illumina Jumping Library construction protocols are limited with the gap sizes of approximately 20 kb and 8 kb, respectively. In the attempt to understand the limitations of constructing PE libraries with greater than 30Kb gaps, we have purified 18, 28, 45, and 65Kb sheared DNA fragments from yeast and circularized the ends using the Cre-loxP approach described in the 454 PE Library protocol. With the increasing fragment sizes, we found a general trend of decreasing library quality in several areas. First, redundant reads and reads containing multiple loxP linkers increase when the average fragment size increases. Second, the contamination of short distance pairs (<10Kb) increases as the fragment size increases. Third, chimeric rate increases with the increasing fragment sizes. We have modified several steps to improve the quality of the long span PE libraries. The modification includes (1) the use of special PFGE program to reduce small fragment contamination; (2) the increase of DNA samples in the circularization step and prior to the PCR to reduce redundant reads; and (3) the decrease of fragment size in the double SPRI size selection to get a higher frequency of LoxP linker containing reads. With these modifications we have generated large gap size PE libraries with a much better quality.

  12. Effect of silver incorporation in phase formation and band gap tuning of tungsten oxide thin films

    SciTech Connect (OSTI)

    Jolly Bose, R.; Kumar, R. Vinod; Sudheer, S. K.; Mahadevan Pillai, V. P. [Department of Optoelectronics, University of Kerala, Kariyavattom, Thiruvananthapuram, Kerala 695581 (India); Reddy, V. R.; Ganesan, V. [UGC - DAE Consortium for Scientific Research, Khandwa Road, Indore 452017, Madhyapradesh (India)

    2012-12-01T23:59:59.000Z

    Silver incorporated tungsten oxide thin films are prepared by RF magnetron sputtering technique. The effect of silver incorporation in micro structure evolution, phase enhancement, band gap tuning and other optical properties are investigated using techniques such as x-ray diffraction, micro-Raman spectroscopy, atomic force microscopy, scanning electron microscopy, energy dispersive x-ray spectroscopy, and UV-Visible spectroscopy. Effect of silver addition in phase formation and band gap tuning of tungsten oxide thin films are investigated. It is found that the texturing and phase formation improves with enhancement in silver content. It is also found that as the silver incorporation enhances the thickness of the films increases at the same time the strain in the film decreases. Even without annealing the desired phase can be achieved by doping with silver. A broad band centered at the wavelength 437 nm is observed in the absorption spectra of tungsten oxide films of higher silver incorporation and this can be attributed to surface plasmon resonance of silver atoms present in the tungsten oxide matrix. The transmittance of the films is decreased with increase in silver content which can be due to increase in film thickness, enhancement of scattering, and absorption of light caused by the increase of grain size, surface roughness and porosity of films and enhanced absorption due to surface plasmon resonance of silver. It is found that silver can act as the seed for the growth of tungsten oxide grains and found that the grain size increases with silver content which in turn decreases the band gap of tungsten oxide from 3.14 eV to 2.70 eV.

  13. Calculation of the Superconductivity Gap of Metal from Its Parameters in Normal State

    E-Print Network [OSTI]

    I. M. Yurin

    2006-04-09T23:59:59.000Z

    A previously considered model interpreted a superconductor as an electron gas immersed in a medium with the dielectric constant $\\epsilon$ and a certain elasticity, which could be determined by measured sonic speed in the metal. The obtained expression of effective electron-electron interaction (EEI) potential unambiguously implied that, contrary to the suggestions of BCS theory, it is its long-wave limit which is responsible for the emergence of bound two-electron states and, consequently, for gap formation in one-electron spectrum of the metal. However, the existence of singularities in the EEI potential expression continued to pose a problem, which did not allow a calculation of the gap value for specific superconducting materials, first of all, for metals belonging to periodic table (PT). In the present work, I suggest taking into account matrix elements traditionally attributed to electron scattering in EEI effective potential calculations. For superconductors that has been made on the basis of a semiconductor material by implanting electro-active defects into it, this inclusion results in the appearance of an uncertainty of electron momentum $\\delta p \\sim l^{- 1}$, where $l$ is the electron free path. When considering pure PT metals, Hamiltonian terms relating to creation and annihilaton of phonons should be taken into account, which also produces an uncertainty of electron momentum. This uncertainty results in a regularization of EEI potential expression and, therefore, in a possibility of examination of physical properties of specific superconductors. Results of calculation of superconductivity gap value for a range of simple metals (Al, Zn, Pb, Sn) confirm the consistency of the developed approach.

  14. Regulation of gap junction function and Connexin 43 expression by cytochrome P450 oxidoreductase (CYPOR)

    SciTech Connect (OSTI)

    Polusani, Srikanth R.; Kar, Rekha; Riquelme, Manuel A.; Masters, Bettie Sue [The University of Texas Health Science Center at San Antonio, Department of Biochemistry, San Antonio, TX 78229 (United States)] [The University of Texas Health Science Center at San Antonio, Department of Biochemistry, San Antonio, TX 78229 (United States); Panda, Satya P., E-mail: panda@uthscsa.edu [The University of Texas Health Science Center at San Antonio, Department of Biochemistry, San Antonio, TX 78229 (United States)

    2011-08-05T23:59:59.000Z

    Highlights: {yields} Humans with severe forms of cytochrome P450 oxidoreductase (CYPOR) mutations show bone defects as observed in Antley-Bixler Syndrome. {yields} First report showing knockdown of CYPOR in osteoblasts decreased Connexin 43 (Cx43) protein levels. Cx43 is known to play an important role in bone modeling. {yields} Knockdown of CYPOR decreased Gap Junctional Intercellular Communication and hemichannel activity. {yields} Knockdown of CYPOR decreased Cx43 in mouse primary calvarial osteoblasts. {yields} Decreased Cx43 expression was observed at the transcriptional level. -- Abstract: Cytochrome P450 oxidoreductase (CYPOR) is a microsomal electron-transferring enzyme containing both FAD and FMN as co-factors, which provides the reducing equivalents to various redox partners, such as cytochromes P450 (CYPs), heme oxygenase (HO), cytochrome b{sub 5} and squalene monooxygenase. Human patients with severe forms of CYPOR mutation show bone defects such as cranio- and humeroradial synostoses and long bone fractures, known as Antley-Bixler-like Syndrome (ABS). To elucidate the role of CYPOR in bone, we knocked-down CYPOR in multiple osteoblast cell lines using RNAi technology. In this study, knock-down of CYPOR decreased the expression of Connexin 43 (Cx43), known to play a critical role in bone formation, modeling, and remodeling. Knock-down of CYPOR also decreased Gap Junction Intercellular Communication (GJIC) and hemichannel activity. Promoter luciferase assays revealed that the decrease in expression of Cx43 in CYPOR knock-down cells was due to transcriptional repression. Primary osteoblasts isolated from bone specific Por knock-down mice calvariae confirmed the findings in the cell lines. Taken together, our study provides novel insights into the regulation of gap junction function by CYPOR and suggests that Cx43 may play an important role(s) in CYPOR-mediated bone defects seen in patients.

  15. Determing Degradation Of Fiberboard In The 9975 Shipping Package By Measuring Axial Gap

    SciTech Connect (OSTI)

    Hackney, E. R.; Dougherty, W. L.; Dunn, K. A.; Stefek, T. M

    2013-08-01T23:59:59.000Z

    Currently, thousands of model 9975 transportation packages are in use by the US Department of Energy (DOE); the design of which has been certified by DOE for shipment of Type B radioactive and fissile materials in accordance with Part 71, Title 10 Code of Federal Regulations (CFR), or 10 CFR 71, Packaging and Transportation of Radioactive Material. These transportation packages are also approved for the storage of DOE-STD-3013 containers at the Savannah River Site (SRS). As such, the 9975 has been continuously exposed to the service environment for a period of time greater than the approved transportation service life. In order to ensure the material integrity as specified in the safety basis, an extensive surveillance program is in place in K-Area Complex (KAC) to monitor the structural and thermal properties of the fiberboard of the 9975 shipping packages. The surveillance approach uses a combination of Non-Destructive Examination (NDE) field surveillance and Destructive Examination (DE) lab testing to validate the 9975 performance assumptions. The fiberboard in the 9975 is credited with thermal insulation, criticality control and resistance to crushing. During surveillance monitoring in KAC, an increased axial gap of the fiberboard was discovered on selected items packaged at Rocky Flats Environmental Technology Site (RFETS). Many of these packages were later found to contain excess moisture. Savannah River National Laboratory (SRNL) testing has resulted in a better understanding of the relationship between the fiberboard moisture level and compaction of the fiberboard under storage conditions and during transport. In laboratory testing, the higher moisture content has been shown to correspond to higher total compaction of fiberboard material and compaction rate. The fiberboard height is reduced by compression of the layers. This change is observed directly in the axial gap between the flange and the air shield. The axial gap measurement is made during the pre-use inspection or during the annual recertification process and is a screening measurement for changes in the fiberboard.

  16. Analysis of plasma-magnetic photonic crystal with a tunable band gap

    SciTech Connect (OSTI)

    Mehdian, H.; Mohammadzahery, Z.; Hasanbeigi, A. [Department of Physics and Plasma Research Institute of Tarbiat Moallem University, 49 Dr Mofatteh Avenue, Tehran 15614 (Iran, Islamic Republic of)

    2013-04-15T23:59:59.000Z

    In this paper, electromagnetic wave propagation through the one-dimensional plasma-magnetic photonic crystal in the presence of external magnetic field has been analyzed. The dispersion relation, transmission and reflection coefficients have been obtained by using the transfer matrix method. It is investigated how photonic band gap of photonic crystals will be tuned when both dielectric function {epsilon} and magnetic permeability {mu} of the constitutive materials, depend on applied magnetic field. This is shown by one dimensional photonic crystals consisting of plasma and ferrite material layers stacked alternately.

  17. Experimental study of upper sd shell nuclei and evolution of sd-fp shell gap

    SciTech Connect (OSTI)

    Sarkar, M. Saha [Saha Institute of Nuclear Physics, Kolkata - 700064 (India)

    2012-06-27T23:59:59.000Z

    The intruder orbitals from the fp shell play important role in the structure of nuclei around the line of stability in the upper sd shell. Experimentally we have studied {sup 35}Cl, {sup 30}P, {sup 36}Cl, {sup 37}Ar and {sup 34}Cl in this mass region using the INGA setup. Large basis cross-shell shell model calculations have indicated the need for change of the sd-fp energy gap for reliable reproduction of negative parity and high spin positive parity states. Indication of population of states of large deformation has been found in our data. Theoretical interpretation of these states has been discussed.

  18. Gap anisotropy and universal pairing scale in a spin-fluctuation model of cuprate superconductors 

    E-Print Network [OSTI]

    Abanov, Artem; Chubukov, A. V.; Norman, M. R.

    2008-01-01T23:59:59.000Z

    -Tc cu- prate superconductors is a key problem.1 Some argue that the pseudogap originates from #1;quasi-#2;long-range order in a non- pairing channel #1;two-gap scenario#2;.2 Others argue instead that the pseudogap is a phase in which fermions already... and W is the bandwidth. For u#2;1, it is natural to assume that pairing is confined to near the Fermi surface and can be thought of as mediated by a bosonic ?glue,? the most natural candidate being collective excitations in the spin channel, enhanced...

  19. Methodology for Defining Gap Areas between Course-over-ground Locations

    SciTech Connect (OSTI)

    Wilson, John E.

    2013-09-30T23:59:59.000Z

    Finding all areas that lie outside some distance d from a polyline is a problem with many potential applications. This application of the Visual Sample Plan (VSP) software required finding all areas that were more than distance d from a set of existing paths (roads and trails) represented by polylines. An outer container polygon (known in VSP as a “sample area”) defines the extents of the area of interest. The term “gap area” was adopted for this project, but another useful term might be “negative coverage area.” The project required a polygon solution rather than a raster solution. The search for a general solution provided no results, so this methodology was developed

  20. Wave equations for determining energy-level gaps of quantum systems

    E-Print Network [OSTI]

    Zeqian Chen

    2006-09-10T23:59:59.000Z

    An differential equation for wave functions is proposed, which is equivalent to Schr\\"{o}dinger's wave equation and can be used to determine energy-level gaps of quantum systems. Contrary to Schr\\"{o}dinger's wave equation, this equation is on `bipartite' wave functions. It is shown that those `bipartite' wave functions satisfy all the basic properties of Schr\\"{o}dinger's wave functions. Further, it is argued that `bipartite' wave functions can present a mathematical expression of wave-particle duality. This provides an alternative approach to the mathematical formalism of quantum mechanics.