Sample records for firm level heterogeneity

  1. 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 ...

  2. 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

  3. 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

  4. 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

  5. Molecular-level Design of Heterogeneous Chiral Catalysts

    SciTech Connect (OSTI)

    Gellman, Andrew John [Carnegie Mellon University; Sholl, David S. [Georgia Institute of Technology; Tysoe, Wilfred T. [University of Wisconsin - Milwaukee; Zaera, Francisco [University of California at Riverside

    2013-04-28T23:59:59.000Z

    Understanding and controlling selectivity is one of the key challenges in heterogeneous catalysis. Among problems in catalytic selectivity enantioselectivity is perhaps the most the most challenging. The primary goal of the project on “Molecular-level Design of Heterogeneous Chiral Catalysts” is to understand the origins of enantioselectivity on chiral heterogeneous surfaces and catalysts. The efforts of the project team include preparation of chiral surfaces, characterization of chiral surfaces, experimental detection of enantioselectivity on such surfaces and computational modeling of the interactions of chiral probe molecules with chiral surfaces. Over the course of the project period the team of PI’s has made some of the most detailed and insightful studies of enantioselective chemistry on chiral surfaces. This includes the measurement of fundamental interactions and reaction mechanisms of chiral molecules on chiral surfaces and leads all the way to rationale design and synthesis of chiral surfaces and materials for enantioselective surface chemistry. The PI’s have designed and prepared new materials for enantioselective adsorption and catalysis. Naturally Chiral Surfaces • Completion of a systematic study of the enantiospecific desorption kinetics of R-3-methylcyclohexanone (R-3-MCHO) on 9 achiral and 7 enantiomeric pairs of chiral Cu surfaces with orientations that span the stereographic triangle. • Discovery of super-enantioselective tartaric acid (TA) and aspartic acid (Asp) decomposition as a result of a surface explosion mechanism on Cu(643)R&S. Systematic study of super-enantiospecific TA and Asp decomposition on five enantiomeric pairs of chiral Cu surfaces. • Initial observation of the enantiospecific desorption of R- and S-propylene oxide (PO) from Cu(100) imprinted with {3,1,17} facets by L-lysine adsorption. Templated Chiral Surfaces • Initial observation of the enantiospecific desorption of R- and S-PO from Pt(111) and Pd(111) modified by a variety of chiral templates. • Demonstrated enantioselective separation of racemic PO on chemically synthesized chiral gold nanoparticles. • Discovery of zwitterionic adsorption states of amino acids on Pd(111). • First structure determinations of adsorbed amino acids and identification of tetrameric chiral template structures. • Exploration of the enantiospecific interaction of PO and R-3-MCHO adsorption on chirally modified Cu(100), Cu(110) and Cu(111). One-to-One Interactions • Determination of cinchona orientation on Pt surfaces in situ at the solid-liquid interface using FT-IRAS. • Systematic study of the influence of solution properties on the adsorption of modified cinchonas alkaloids onto Pt surfaces. • Correlation of cinchona adsorption with catalytic activity, as affected by concentration, the nature of the solvent, and dissolved gases in the liquid phase. • Measurement of enantioselective chemisorption on 1-(1-naphthyl) ethylamine (NEA) modified Pt(111) and Pd(111) surfaces. • Imaging of chiral docking complexes between NEA and methyl pyruvate on Pd(111). Chiral Catalyst Synthesis • Anchoring of cinchona alkaloid to surfaces • Synthesis of chiral Au nanoparticles and demonstration of their enantiospecific interactions with R- and S-PO. • Elucidation of the driving forces for chiral imprinting of Cu(100) by L- and D-lysine to form Cu(3,1,17)R&S facets.

  6. 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

  7. Molecular-Level Design of Heterogeneous Chiral Catalysis

    SciTech Connect (OSTI)

    Francisco Zaera

    2012-03-21T23:59:59.000Z

    The following is a proposal to continue our multi-institutional research on heterogeneous chiral catalysis. Our team combines the use of surface-sensitive analytical techniques for the characterization of model systems with quantum and statistical mechanical calculations to interpret experimental data and guide the design of future research. Our investigation focuses on the interrelation among the three main mechanisms by which enantioselectivity can be bestowed to heterogeneous catalysts, namely: (1) by templating chirality via the adsorption of chiral supramolecular assemblies, (2) by using chiral modifiers capable of forming chiral complexes with the reactant and force enantioselective surface reactions, and (3) by forming naturally chiral surfaces using imprinting chiral agents. Individually, the members of our team are leaders in these various aspects of chiral catalysis, but the present program provides the vehicle to generate and exploit the synergies necessary to address the problem in a comprehensive manner. Our initial work has advanced the methodology needed for these studies, including an enantioselective titration procedure to identify surface chiral sites, infrared spectroscopy in situ at the interface between gases or liquids and solids to mimic realistic catalytic conditions, and DFT and Monte Carlo algorithms to simulate and understand chirality on surfaces. The next step, to be funded by the monies requested in this proposal, is to apply those methods to specific problems in chiral catalysis, including the identification of the requirements for the formation of supramolecular surface structures with enantioselective behavior, the search for better molecules to probe the chiral nature of the modified surfaces, the exploration of the transition from supramolecular to one-to-one chiral modification, the correlation of the adsorption characteristics of one-to-one chiral modifiers with their physical properties, in particular with their configuration, and the development of ways to imprint chiral centers on achiral solid surfaces. Chiral catalysis is not only a problem of great importance in its own right, but also the ultimate test of how to control selectivity in catalysis. The time is ripe for fundamental work in heterogeneous chiral catalysis to provide the U.S. with a leadership role in developing the next generation of catalytic processes for medicinal and agrochemical manufacturing. Our team provides the required expertise for a synergistic and comprehensive integration of physical and chemical experimentation with solid state and molecular reactivity theories to solve this problem.

  8. Control Heterogeneous Catalysis at Atomic and Electronic-level Using

    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 Administration would likeConstitution And BylawsMetal-Organic Frameworks | The Ames

  9. Lake Level Controlled Sedimentological I Heterogenity of Oil Shale, Upper Green River

    E-Print Network [OSTI]

    Gani, M. Royhan

    Chapter 3 Lake Level Controlled Sedimentological 1:'_i 'I I Heterogenity of Oil Shale, Upper Green email: mgani@uno.edu t",. The Green River Formation comprises the world's largest deposit of oil-shale characterization of these lacustrine oil-shale deposits in the subsurface is lacking. This study analyzed ~300 m

  10. Microbial individuality: how single-cell heterogeneity enables population level strategies

    E-Print Network [OSTI]

    Martins, Bruno M. C.; Locke, James C. W.

    2015-02-05T23:59:59.000Z

    A,B). Technologies that deliver individual cell resolution data, such as time-lapse microscopy, flow cytometry, microfluidics and single-cell RNA-seq, are being increasingly used to precisely quantify cell-to-cell heterogeneity in isogenic...

  11. 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 . . . . . . . . .

  12. AN EXPERIMENTAL TOOLCHAIN BASED ON HIGH-LEVEL DATAFLOW MODELS OF COMPUTATION FOR HETEROGENEOUS MPSOC

    E-Print Network [OSTI]

    Boyer, Edmond

    a high-level dataflow language. The experimental platform is based on a 5-core Texas Instruments OMAP4 of functionalities and processing capabilities while respecting a fixed power budget of a few Watts. Recent improvements in em- bedded systems are due to MPSoCs that combine general purpose cores, dedicated cores

  13. 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 ...

  14. 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

  15. 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...

  16. 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...

  17. 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 ...

  18. 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 ...

  19. 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

  20. 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

  1. 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 ...

  2. 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, ...

  3. 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 ...

  4. 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...

  5. 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...

  6. 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...

  7. Heterogeneity and Trade

    E-Print Network [OSTI]

    Costinot, Arnaud

    2007-01-01T23:59:59.000Z

    s ), and, because of free trade in …nal goods, factor price2007], Wealth Heterogeneity and Trade, mimeo Uni- versity ofTheory of International Trade, Cambridge University Press. [

  8. 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 ...

  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. 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...

  11. 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

  12. 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

  13. 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. ...

  14. 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 ...

  15. 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 ...

  16. 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 ...

  17. 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

  18. 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...

  19. Heterogeneous waste processing

    DOE Patents [OSTI]

    Vanderberg, Laura A. (Los Alamos, NM); Sauer, Nancy N. (Los Alamos, NM); Brainard, James R. (Los Alamos, NM); Foreman, Trudi M. (Los Alamos, NM); Hanners, John L. (Los Alamos, NM)

    2000-01-01T23:59:59.000Z

    A combination of treatment methods are provided for treatment of heterogeneous waste including: (1) treatment for any organic compounds present; (2) removal of metals from the waste; and, (3) bulk volume reduction, with at least two of the three treatment methods employed and all three treatment methods emplyed where suitable.

  20. The New Political Economy of Trade : : Heterogeneous Firms and Trade Policy

    E-Print Network [OSTI]

    Plouffe, Michael

    Lobbying on Global Trade. Ithaca: Cornell University Press.Roots of American Trade Policy. ’ World Politics 49.3. 309-The Politics of Foreign Trade. Chicago: Aldine- Atherton,

  1. Financial Fragility, Heterogeneous Firms and the Cross Section of the Business Cycle

    E-Print Network [OSTI]

    Holly, Sean; Santoro, E

    assume c = 1 (without loss of generality) and denoting the equity ratio AiKi by ei : pit = pet #18; #17;a #17; #0; 1 rit eit#0;1#30; a t #19; 1 #15; Y a#0;1 #15; t : (4.31) The price set by the ith ?rm is a negative function of its ?nancial state...

  2. The New Political Economy of Trade : : Heterogeneous Firms and Trade Policy

    E-Print Network [OSTI]

    Plouffe, Michael

    Sean D. 2008. ‘The Tariff and the Lobbyist: PoliticalEconomy of the Smoot-Hawley Tariff. ’ Research in EconomicPolitics, Pressure, and the Tariff. New York: Prentice Hall.

  3. The Yin and Yang of Hardware Heterogeneity: Can Software Survive?

    E-Print Network [OSTI]

    McKinley, Kathryn S.

    The Yin and Yang of Hardware Heterogeneity: Can Software Survive? Kathryn S. McKinley Microsoft- ingly choose high-level managed programming languages with safe pointer disciplines, garbage collection

  4. Emerging heterogeneities in Italian customs

    E-Print Network [OSTI]

    Agliari, Elena; Galluzzi, Andrea; Javarone, Marco Alberto; Pizzoferrato, Andrea; Tantari, Daniele

    2015-01-01T23:59:59.000Z

    Since its unification, more than a century ago, Italy has experienced strong social and economical diversities between its southern and northern regions. In the last decades, Italy has undergone a severe economical and political crisis reflecting corruption at various levels of social stratification as well as a poor involvement of its population in the number of elections that occurred. This might be explained by a lack of confidence, or interest in the country as a whole, as if the primary social and political focus of its citizens could still lay at smaller regional scales, possibly evidencing the persistence of different cultural heritages. In order to shed lights on the possible existence of such heterogeneities, we perform a statistical-mechanics-driven analysis focusing on key social quantifiers, namely the evolution of autochthonous marriages (as family still plays as a fundamental brick in the edification of social aggregates) and of mixed marriages, namely those involving a foreign-born and a native...

  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. 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...

  8. 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...

  9. 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...

  10. 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

  11. 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...

  12. 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

  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

    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...

  14. 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...

  15. 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...

  16. Chimera states in heterogeneous networks

    E-Print Network [OSTI]

    Carlo R. Laing

    2008-12-17T23:59:59.000Z

    Chimera states in networks of coupled oscillators occur when some fraction of the oscillators synchronise with one another, while the remaining oscillators are incoherent. Several groups have studied chimerae in networks of identical oscillators, but here we study these states in a heterogeneous model for which the natural frequencies of the oscillators are chosen from a distribution. We obtain exact results by reduction to a finite set of differential equations. We find that heterogeneity can destroy chimerae, destroy all states except chimerae, or destabilise chimerae in Hopf bifurcations, depending on the form of the heterogeneity.

  17. Heterogeneity in the properties of burst-forming units of erythroid lineage in sickle cell anemia: DNA synthesis and burst-promoting activity production is related to peripheral hemoglobin F levels

    SciTech Connect (OSTI)

    Croizat, H.; Billett, H.H.; Nagel, R.L. (Albert Einstein College of Medicine/Montefiore Medical Center, Bronx, NY (USA))

    1990-02-15T23:59:59.000Z

    Circulating 14-day erythroid progenitors (BFU-E) from 28 sickle cell anemia (SS) patients with hemoglobin F (HbF) levels ranging from 2% to 16% were studied to determine their sensitivity to ({sup 3}H) thymidine kill and burst-promoting activity (BPA)-like factor production. We find that the proportion of BFU-E sensitive to 3H-dT kill, and hence active in DNA synthesis, was inversely correlated with the percent of peripheral HbF when light density (LD) mononuclear cells were used for plating. Regression analysis showed that the correlation between HbF level and BFU-E kill was highly significant (r = .88; P less than .00003). We confirmed the BPA-like factor(s) production by LD mononuclear cells of SS patients, and found, in addition, that this phenomenon is restricted to the population of SS patients with HbF levels lower than 9%. Circulating BFU-E of patients with high HbF levels are not sensitive to 3H-dT, and their mononuclear cells do not release BPA-like factor. In summary, SS patients exhibit differences in the capacity of their mononuclear cells to produce BPA activity according to their peripheral HbF level, as well as to the DNA synthesis-state of their circulating BFU-E. We conclude that erythroid progenitors differ among SS patients in relation to their peripheral HbF level.

  18. Portable performance on heterogeneous architectures

    E-Print Network [OSTI]

    Phothilimthana, Phitchaya Mangpo

    Trends in both consumer and high performance computing are bringing not only more cores, but also increased heterogeneity among the computational resources within a single machine. In many machines, one of the greatest ...

  19. 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 ...

  20. 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...

  1. 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 ...

  2. 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 ...

  3. 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...

  4. 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 ...

  5. 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...

  6. 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 ...

  7. 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...

  8. 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...

  9. 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

  10. New multilateral well architecture in heterogeneous reservoirs

    E-Print Network [OSTI]

    Jia, Hongqiao

    2004-09-30T23:59:59.000Z

    . The performance of new multilateral well in heterogeneous reservoirs is studied, and that is compared with vertical well architecture also. In order to study the productivity of new multilateral wells, we use a numerical simulation method to set up heterogeneous...

  11. Audits for For-Profit Firms FAQ

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

    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 33Frequently20,000 RussianBy:WhetherNovember 13, 2009 Management(Updated 12/31/2010) The U.S.

  12. 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...

  13. 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...

  14. 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

  15. 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.

  16. INTERFACE SYNTHESIS IN HETEROGENEOUS SYSTEM-LEVEL DSP DESIGN TOOLS

    E-Print Network [OSTI]

    using the synchronous dataflow (SDF)[1] model of computation in Ptolemy[2] and can be extended to other to a form of dataflow known as SDF. Through use, SDF has proven to be an appropriate model for describing ourselves to SDF, we are able to statically schedule and then incrementally compile subsystems

  17. System-Level Energy Modeling for Heterogeneous Reconfigurable Chip Multiprocessors

    E-Print Network [OSTI]

    Ziavras, Sotirios G.

    statistics. Experiments with the parallel LU factorization of large sparse matrices show an average error floating-point (FP) data-parallel applications and groups of processors can work simultaneously in a variety of independent or cooperating parallel computing modes, such as SIMD (Single-Instruction, Multiple

  18. 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 ...

  19. 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 ...

  20. 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 ...

  1. 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 ...

  2. 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 ...

  3. 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

  4. 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...

  5. Runtime Adaptation for Autonomic Heterogeneous Computing | ornl...

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

    goal is to make the complex functions of heterogeneous computing autonomic, handling load balancing, memory coherence and other performance critical factors in the runtime. This...

  6. Heterogeneous Catalysis on Atomically Dispersed Supported Metals...

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

    Catalysis on Atomically Dispersed Supported Metals: CO2 Reduction on Multifunctional Pd Catalysts. Heterogeneous Catalysis on Atomically Dispersed Supported Metals: CO2 Reduction...

  7. Chimera: Hypertext for Heterogeneous Software Environments

    E-Print Network [OSTI]

    Whitehead, James

    Chimera: Hypertext for Heterogeneous Software Environments Kenneth M. Anderson, Richard N. Taylor the approach and presents an architecture which supports it. Experience with the Chimera prototype and its

  8. Feedbacks Between Hydrological Heterogeneity and Bioremediation

    E-Print Network [OSTI]

    Hubbard, Susan

    Feedbacks Between Hydrological Heterogeneity and Bioremediation Induced Biogeochemical, intensively studied over the last 20 years (4), has potential to further impact bioremediation efforts

  9. Chimera: Hypermedia for Heterogeneous Software Development Environments

    E-Print Network [OSTI]

    Whitehead, James

    1 of 31 Chimera: Hypermedia for Heterogeneous Software Development Environments Abstract Emerging of "Chimera: Hypertext for Heterogeneous Software Environments," which appeared in the proceedings of ECHT'94 the approach employed by the Chimera open hypermedia system to address this research area, and also serves

  10. 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''.

  11. HETEROGENEOUS REBURNING BY MIXED FUELS

    SciTech Connect (OSTI)

    Wei-Yin Chen; Benson B. Gathitu

    2005-01-14T23:59:59.000Z

    Recent studies of heterogeneous reburning, i.e., reburning involving a coal-derived char, have elucidated its variables, kinetics and mechanisms that are valuable to the development of a highly efficient reburning process. Young lignite chars contain catalysts that not only reduce NO, but they also reduce HCN that is an important intermediate that recycles to NO in the burnout zone. Gaseous CO scavenges the surface oxides that are formed during NO reduction, regenerating the active sites on the char surface. Based on this mechanistic information, cost-effective mixed fuels containing these multiple features has been designed and tested in a simulated reburning apparatus. Remarkably high reduction of NO and HCN has been observed and it is anticipated that mixed fuel will remove 85% of NO in a three-stage reburning process.

  12. Heterogeneous Reburning By Mixed Fuels

    SciTech Connect (OSTI)

    Anderson Hall

    2009-03-31T23:59:59.000Z

    Recent studies of heterogeneous reburning, i.e., reburning involving a coal-derived char, have elucidated its variables, kinetics and mechanisms that are valuable to the development of a highly efficient reburning process. Young lignite chars contain catalysts that not only reduce NO, but they also reduce HCN that is an important intermediate that recycles to NO in the burnout zone. Gaseous CO scavenges the surface oxides that are formed during NO reduction, regenerating the active sites on the char surface. Based on this mechanistic information, cost-effective mixed fuels containing these multiple features has been designed and tested in a simulated reburning apparatus. Remarkably high reduction of NO and HCN has been observed and it is anticipated that mixed fuel will remove 85% of NO in a three-stage reburning process.

  13. 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

  14. Structural and Energetic Heterogeneity in Protein Folding

    E-Print Network [OSTI]

    Steven S. Plotkin; Jose N. Onuchic

    2000-09-27T23:59:59.000Z

    A general theoretical framework is developed using free energy functional methods to understand the effects of heterogeneity in the folding of a well-designed protein. Native energetic heterogeneity arising from non-uniformity in native stability, as well as entropic heterogeneity intrinsic to the topology of the native structure are both investigated as to their impact on the folding free energy landscape and resulting folding mechanism. Given a minimally frustrated protein, both structural and energetic heterogeneity lower the thermodynamic barrier to folding, and designing in sufficient heterogeneity can eliminate the barrier at the folding transition temperature. Sequences with different distributions of stability throughout the protein and correspondingly different folding mechanisms may still be good folders to the same structure. This theoretical framework allows for a systematic study of the coupled effects of energetics and topology in protein folding, and provides interpretations and predictions for future experiments which may investigate these effects.

  15. Essays on regional and firm-level productivity, military spending, and technology

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01T23:59:59.000Z

    BLDG & REPAIRING GENERAL ELECTRIC CO CONGLOMERATES GENERALINC GENERAL DYNAMICS CORP GENERAL ELECTRIC CO GENERAL MOTORSCo Northrop Grumman General Dynamics United Technologies General Electric

  16. Essays on regional and firm-level productivity, military spending, and technology

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01T23:59:59.000Z

    research and development (R&D) and The peak in real defense spendingspending leads to an increase in privately funded research and developmentspending shock, while the microeconomic literature has studied government support for research and development

  17. Description of FLIPSIM V: a General Firm Level Policy Simulation Model.

    E-Print Network [OSTI]

    Richardson, James W.; Nixon, Clair J.

    1986-01-01T23:59:59.000Z

    ................................................ 25 Subroutine FINAN .. .. ............................ . ................ 26 Subroutine LANDVL ............................................... 26 Subroutine DEPREC .............. . ................................. 27 Subroutine LEASE... the flexibility to lease farm machinery, and (g) adding a quadratic programming algorithm to determine crop mix. The model was .developed to allow analysis of the probable consequences of' alternative farm policies and income tax developments on typical...

  18. Mutual Fund Trading Pressure: Firm-Level Stock Price Impact and Timing of SEOs

    E-Print Network [OSTI]

    Khan, Mozaffar Nayim

    We use price pressure resulting from purchases by mutual funds with large capital inflows to identify overvalued equity. This is a relatively exogenous overvaluation indicator as it is associated with who is buying—buyers ...

  19. Essays on regional and firm-level productivity, military spending, and technology

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01T23:59:59.000Z

    BLDG & REPAIRING GENERAL ELECTRIC CO CONGLOMERATES GENERALUnited Technologies General Electric TRW Inc Honeywell Inc-United Technologies General Electric TRW Inc Honeywell Inc-

  20. Essays on regional and firm-level productivity, military spending, and technology

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01T23:59:59.000Z

    COMPUSTAT ALLIEDSIGNAL (now Honeywell) AIRCRAFT PARTS, AUXOFFICE EQUIPMENT HONEYWELL INC (pre 1999) AUTOMATICGeneral Electric TRW Inc Honeywell Inc- AlliedSignal Textron

  1. Essays on the Relationship of Competition and Firms' Price Responses

    E-Print Network [OSTI]

    Lee, Sungbok

    2012-02-14T23:59:59.000Z

    : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : : 133 xi LIST OF TABLES TABLE Page I Quarterly and Over-the-Period Types of Routes : : : : : : : : : : : : 17 II GS?s Approach vs. BR?s Approach: Fixed-E ects Panel Estimates : : 26 III Pooling Routes Types vs. Pooling Carrier Types: Cross... when it directly observes consumer heterogeneity or indirectly elicits it.1 However, they have been still not agreed on whether price discrimination is persistent over increases in competition. For instance, Borenstein and Rose (BR) (1994...

  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. Percolation and homogenization theories for heterogeneous materials

    E-Print Network [OSTI]

    Chen, Ying, Ph. D. Massachusetts Institute of Technology

    2008-01-01T23:59:59.000Z

    Most materials produced by Nature and by human beings are heterogeneous. They contain domains of different states, structures, compositions, or material phases. How these different domains are distributed in space, or in ...

  7. An Empirical Model for Heterogeneous Translucent Objects

    E-Print Network [OSTI]

    Durand, Frédo

    scatter- ing in heterogeneous translucent objects. Motivated by the exponential fall-off of scattered in the marble example (Figure 3). Figure 3: The marble example. Left: Modulation texture and diffusely lit

  8. Heterogeneous effects in fast breeder reactors

    E-Print Network [OSTI]

    Gregory, Michael Vladimir

    1973-01-01T23:59:59.000Z

    Heterogeneous effects in fast breeder reactors are examined through development of simple but accurate models for the calculation of a posteriori corrections to a volume-averaged homogeneous representation. Three distinct ...

  9. Essays on economies with heterogeneous labor

    E-Print Network [OSTI]

    Lehr, Brandon Charles

    2010-01-01T23:59:59.000Z

    In this thesis, I study two different economies that consist of heterogeneous labor. By allowing for differences among individuals where previous analyses restricted attention to homogeneous labor, I am able to understand ...

  10. Dynamical Heterogeneities in Grains and Foams

    E-Print Network [OSTI]

    Olivier Dauchot; Douglas J. Durian; Martin van Hecke

    2010-10-05T23:59:59.000Z

    Dynamical heterogeneities have been introduced in the context of the glass transition of molecular liquids and the lengthscale associated with them has been argued to be at the origin of the observed quasi-universal behaviour of glassy systems. Dense amorphous packings of granular media and foams also exhibit slow dynamics, intermittency and heterogeneities. We review a number of recent experimental studies of these systems, where one has direct access to the relevant space-time dynamics, allowing for direct visualisations of the dynamical heterogeneities. On one hand these visualisations provide a unique opportunity to access the microscopic mechanisms responsible for the growth of dynamical correlations. On the other hand focussing on the differences in these heterogeneities in microscopically different systems allows to discuss the range of the analogies between molecular thermal glasses and athermal glasses such as granular media and foams. Finally this review is the opportunity to discuss various approaches to actually extract quantitatively the dynamical lengthscale from experimental data.

  11. 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

  12. 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

  13. 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

  14. 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

  15. 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

  16. Investigation of the most appropriate capital structure theory and leverage level determinants 

    E-Print Network [OSTI]

    Lew, Sung Hee

    2012-10-03T23:59:59.000Z

    This thesis examines capital structure theories and debt level determinants to develop a better understanding, and to establish the most appropriate theory to explain the behaviour of firms? debt and equity choices. It ...

  17. A collision probability analysis of the double-heterogeneity problem

    SciTech Connect (OSTI)

    Hebert, A. (Commissariat a l'Energie Atomique, Yvette (France))

    1993-10-01T23:59:59.000Z

    A practical collision probability model is presented for the description of geometries with many levels of heterogeneity. Regular regions of the macrogeometry are assumed to contain a stochastic mixture of spherical grains or cylindrical tubes. Simple expressions for the collision probabilities in the global geometry are obtained as a function of the collision probabilities in the macro- and microgeometries. This model was successfully implemented in the collision probability kernel of the APOLLO-1, APOLLO-2, and DRAGON lattice codes for the description of a broad range of reactor physics problems. Resonance self-shielding and depletion calculations in the microgeometries are possible because each microregion is explicitly represented.

  18. 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 ...

  19. 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...

  20. Scheduling Heterogeneous Delay Tolerant Tasks in Smart Grid with Renewable Energy

    E-Print Network [OSTI]

    Sinha, Prasun

    1 Scheduling Heterogeneous Delay Tolerant Tasks in Smart Grid with Renewable Energy Shengbo Chen sources of energy (e.g., harvested renewable energy), and allow for dynamic electricity price, or a business, which is equipped with renewable energy devices when electrical appliances allow different levels

  1. STARPU: A Unified Platform for Task Scheduling on Heterogeneous Multicore Architectures

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    to programmers' habits. As none of the main programming standards (i.e., MPI and OPENMP) currently address all the requirements of heterogeneous machines, important standardization efforts are needed. Unless such efforts, the OpenCL API is a very low-level one which basically offers primitives for explicitely offloading tasks

  2. Clustered animal burrows yield higher spatial heterogeneity Y. Yoshihara T. Okuro B. Buuveibaatar

    E-Print Network [OSTI]

    Schweik, Charles M.

    heterogeneity at the landscape level through the spatial pattern of disturbance frequency. Keywords Patch). In the context of communities at the landscape scale, because the disturbance regime (e.g., size, frequency and disturbance regime is important for establishing the mechanisms neces- sary to maintain biodiversity. Our

  3. Mapping mesoscale heterogeneity in the plastic deformation of a copper single crystal

    E-Print Network [OSTI]

    Magid, K. R.

    2009-01-01T23:59:59.000Z

    619. page 18 Mapping mesoscale heterogeneity in a deformedthese planes. page 36 Mapping mesoscale heterogeneity in aJanuary 2009, 77–107 Mapping mesoscale heterogeneity in the

  4. Heterogeneous catalysts | The Ames Laboratory

    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 PowerCherries 82981-1cn SunnybankD.jpgHanfordDepartment ofHeatHenry Hurwitz,Hermann

  5. 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...

  6. 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...

  7. 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 ...

  8. 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 ...

  9. 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...

  10. 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

  11. 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 ...

  12. 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 ...

  13. 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 ...

  14. 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 ...

  15. 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 ...

  16. 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

  17. Heterogeneous Temporal Probabilistic Agents JURGEN DIX

    E-Print Network [OSTI]

    Kraus, Sarit

    and software modules. We will define the concept of a heterogeneous temporal probabilistic (HTP) agent). Intuitively, an FTPSI specifies what all an HTP agent is permitted/forbidden/obliged to do at various times t. As changes occur in the environment, the HTP agent must compute a new FTPSI. HTP agents continuously compute

  18. Modeling the Energy Efficiency of Heterogeneous Clusters

    E-Print Network [OSTI]

    Teo, Yong-Meng

    are an alternative for energy-efficient clusters [18], [20], [23]. On the contrary, other researchersModeling the Energy Efficiency of Heterogeneous Clusters Lavanya Ramapantulu, Bogdan Marius Tudor analyze the energy efficiency of mixing high-performance and low-power nodes in a cluster. Using a model

  19. Chimera states in heterogeneous Kuramoto networks

    E-Print Network [OSTI]

    Laing, Carlo R.

    Chimera states in heterogeneous Kuramoto networks Carlo R. Laing IIMS, Massey University, Auckland discovered by Kuramoto c. 2002; named "chimeras" by Strogatz. #12;· Identical oscillators, so why coherent/incoherent groups? · This type of solution discovered by Kuramoto c. 2002; named "chimeras" by Strogatz. #12

  20. Heterogeneous Catalysis Environmental Catalysis and Processes

    E-Print Network [OSTI]

    Vardi, Amichay

    Department of Chemical Engineering Ben ­ Gurion University of the Negev Blechner Center for Applied CatalysisHeterogeneous Catalysis Environmental Catalysis and Processes Renewable Fuels M. Herskowitz Nanotechnology and advanced methods are applied in use inspired research #12;Fundamental research of catalytic

  1. Heterogeneous lithium niobate photonics on silicon substrates

    E-Print Network [OSTI]

    Fathpour, Sasan

    Heterogeneous lithium niobate photonics on silicon substrates Payam Rabiei,1,* Jichi Ma,1 Saeed-confined lithium niobate photonic devices and circuits on silicon substrates is reported based on wafer bonding high- performance lithium niobate microring optical resonators and Mach- Zehnder optical modulators

  2. ON DIFFUSION IN HETEROGENEOUS MEDIA YOUXUE ZHANG*,

    E-Print Network [OSTI]

    Liu, Liping

    , heterogeneous media, multi-mineral rocks, multi-phase media, composite materials, kinetics, porous rocks to bulk diffusion, and porous materials (such as plants, soil, rock with partial melt or fluid, sediment of air and moisture in soils, drying of paint, wood, and concrete, diffusion of gases in rubber, movement

  3. Vancouver: A Software Stack for Productive Heterogeneous

    E-Print Network [OSTI]

    .S. Department of Energy Vetter_Vancouver_SC10 Vancouver overview · Large-scale heterogeneous system deployments #12;3 Managed by UT-Battelle for the U.S. Department of Energy Vetter_Vancouver_SC10 Language tools optimizations #12;4 Managed by UT-Battelle for the U.S. Department of Energy Vetter_Vancouver_SC10 Runtime data

  4. Semantic Taxonomy Induction from Heterogenous Evidence Computer Science Department

    E-Print Network [OSTI]

    Ng, Andrew Y.

    Semantic Taxonomy Induction from Heterogenous Evidence Rion Snow Computer Science Department­ tic taxonomies. Previous algorithms for taxonomy induction have typically focused on independent over heterogenous relationships to optimize the entire structure of the taxonomy, using knowl­ edge

  5. Semantic Taxonomy Induction from Heterogenous Evidence Computer Science Department

    E-Print Network [OSTI]

    Ng, Andrew Y.

    Semantic Taxonomy Induction from Heterogenous Evidence Rion Snow Computer Science Department- tic taxonomies. Previous algorithms for taxonomy induction have typically focused on independent over heterogenous relationships to optimize the entire structure of the taxonomy, using knowl- edge

  6. Communication Efficient Construction of Decision Trees Over Heterogeneously Distributed Data

    E-Print Network [OSTI]

    Kargupta, Hilol

    Communication Efficient Construction of Decision Trees Over Heterogeneously Distributed Data Chris Giannella Kun Liu Todd Olsen Hillol Kargupta Department of Computer Science and Electrical Engineering to efficiently construct a decision tree over heterogeneously distributed data with- out centralizing. We compare

  7. Laboratory investigations of effective flow behavior in unsaturated heterogeneous sands

    E-Print Network [OSTI]

    Wildenschild, Dorthe

    Laboratory investigations of effective flow behavior in unsaturated heterogeneous sands D, Lyngby Abstract. Two-dimensional unsaturated flow and transport through heterogeneous sand was investigated under controlled laboratory conditions. The unsaturated hydraulic conductivity of five homogeneous

  8. Quantitative, directional measurement of electric field heterogeneity in the

    E-Print Network [OSTI]

    Boxer, Steven G.

    Quantitative, directional measurement of electric field heterogeneity in the active site SUMMARY Extensive structural studies of enzymes have revealed that biological catalysis occurs within substantial electrostatic field heterogeneity, widely differing sensitivities of discrete probes to a set

  9. Characterization of oil and gas reservoir heterogeneity

    SciTech Connect (OSTI)

    Tyler, N.; Barton, M.D.; Bebout, D.G.; Fisher, R.S.; Grigsby, J.D.; Guevara, E.; Holtz, M.; Kerans, C.; Nance, H.S.; Levey, R.A.

    1992-10-01T23:59:59.000Z

    Research described In this report addresses the internal architecture of two specific reservoir types: restricted-platform carbonates and fluvial-deltaic sandstones. Together, these two reservoir types contain more than two-thirds of the unrecovered mobile oil remaining ill Texas. The approach followed in this study was to develop a strong understanding of the styles of heterogeneity of these reservoir types based on a detailed outcrop description and a translation of these findings into optimized recovery strategies in select subsurface analogs. Research targeted Grayburg Formation restricted-platform carbonate outcrops along the Algerita Escarpment and In Stone Canyon In southeastern New Mexico and Ferron deltaic sandstones in central Utah as analogs for the North Foster (Grayburg) and Lake Creek (Wilcox) units, respectively. In both settings, sequence-stratigraphic style profoundly influenced between-well architectural fabric and permeability structure. It is concluded that reservoirs of different depositional origins can therefore be categorized Into a heterogeneity matrix'' based on varying intensity of vertical and lateral heterogeneity. The utility of the matrix is that it allows prediction of the nature and location of remaining mobile oil. Highly stratified reservoirs such as the Grayburg, for example, will contain a large proportion of vertically bypassed oil; thus, an appropriate recovery strategy will be waterflood optimization and profile modification. Laterally heterogeneous reservoirs such as deltaic distributary systems would benefit from targeted infill drilling (possibly with horizontal wells) and improved areal sweep efficiency. Potential for advanced recovery of remaining mobile oil through heterogeneity-based advanced secondary recovery strategies In Texas is projected to be an Incremental 16 Bbbl. In the Lower 48 States this target may be as much as 45 Bbbl at low to moderate oil prices over the near- to mid-term.

  10. Ion beam analyses of radionuclide migration in heterogeneous rocks

    SciTech Connect (OSTI)

    Alonso, Ursula; Missana, Tiziana; Garcia-Gutierrez, Miguel [CIEMAT, Avda. Complutense 40, Madrid 28040 (Spain); Patelli, Alessandro [CIVEN, Via delle Industrie 5, Venezia-Marghera 30175 (Italy); Rigato, Valentino; Ceccato, Daniele [LNL-INFN, Viale dell' Universita 2, Legnaro-Padova 35020 (Italy)

    2013-07-18T23:59:59.000Z

    The migration of radionuclides (RN) in the environment is a topic of general interest, for its implications on public health, and it is an issue for the long-term safety studies of deep geological repositories (DGR) for high-level radioactive waste. The role played by colloids on RN migration is also of great concern. Diffusion and sorption are fundamental mechanisms controlling RN migration in rocks and many experimental approaches are applied to determine transport parameters for low sorbing RN in homogeneous rocks. However, it is difficult to obtain relevant data for high sorbing RN or colloids, for which diffusion lengths are extremely short, or within heterogeneous rocks, where transport might be different in different minerals. The ion beam techniques Rutherford Backscattering Spectrometry (RBS) and micro-Particle Induced X-Ray Emission ({mu}PIXE), rarely applied in the field, were selected for their micro-analytical potential to study RN diffusion and surface retention within heterogeneous rocks. Main achievements obtained during last 12 years are highlighted.

  11. ORIGINAL RESEARCH PAPER Gridding heterogeneous bathymetric data sets with stacked

    E-Print Network [OSTI]

    Jakobsson, Martin

    heterogeneous bathymetric data sets for the compilation of Digital bathymetric models (DBMs), poses specific of the most widely used gridding methods, our approach yields superior DBMs based on heterogeneous bathymetric gridding algorithm has been specifically designed to con- struct DBMs from heterogeneous bathymetric source

  12. Design of heterogeneous turbine blade Xiaoping Qian, Deba Dutta*

    E-Print Network [OSTI]

    Qian, Xiaoping

    Design of heterogeneous turbine blade Xiaoping Qian, Deba Dutta* Department of Mechanical in turbine drivers push the material capabilities of turbine blades to the limit. The recent development of heterogeneous objects by layered manufacturing offers new potentials for the turbine blades. In heterogeneous

  13. Microgrids and Heterogeneous Power Quality and Reliability

    SciTech Connect (OSTI)

    LaCommare, Kristina; Marnay, Chris

    2007-10-01T23:59:59.000Z

    This paper describes two stylized alternative visions of how the power system might evolve to meet future requirements for the high quality electricity service that modern digital economies demand, a supergrids paradigm and a dispersed paradigm. Some of the economics of the dispersed vision are explored, and perspectives are presented on both the choice of homogeneous universal power quality upstream in the electricity supply chain and on the extremely heterogeneous requirements of end-use loads. It is argued that meeting the demanding requirements of sensitive loads by local provision of high quality power may be more cost effective than increasing the quality of universal homogeneous supply upstream in the legacy grid. Finally, the potential role of microgrids in delivering heterogeneous power quality is demonstrated by reference to two ongoing microgrid tests in the U.S. and Japan.

  14. Dedicated heterogeneous node scheduling including backfill scheduling

    DOE Patents [OSTI]

    Wood, Robert R. (Livermore, CA); Eckert, Philip D. (Livermore, CA); Hommes, Gregg (Pleasanton, CA)

    2006-07-25T23:59:59.000Z

    A method and system for job backfill scheduling dedicated heterogeneous nodes in a multi-node computing environment. Heterogeneous nodes are grouped into homogeneous node sub-pools. For each sub-pool, a free node schedule (FNS) is created so that the number of to chart the free nodes over time. For each prioritized job, using the FNS of sub-pools having nodes useable by a particular job, to determine the earliest time range (ETR) capable of running the job. Once determined for a particular job, scheduling the job to run in that ETR. If the ETR determined for a lower priority job (LPJ) has a start time earlier than a higher priority job (HPJ), then the LPJ is scheduled in that ETR if it would not disturb the anticipated start times of any HPJ previously scheduled for a future time. Thus, efficient utilization and throughput of such computing environments may be increased by utilizing resources otherwise remaining idle.

  15. 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.

  16. 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

  17. 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

  18. Argonne integrated heterogeneous file transfer network

    SciTech Connect (OSTI)

    Schofield, J.

    1984-01-01T23:59:59.000Z

    This presentation describes the computing environment at Argonne National Laboratory and the actions underway to implement a coherent hierarchy of computing systems connected through a heterogeneous file transfer network. A major goal of the Computing Services Division is to integrate heterogeneous computing elements incrementally into a nework, with the goal of having everything somehow connected to everything else. Using standard IBM networking protocols, we have already built a full-function computer-to-computer file transfer network of IBM and DEC VAX systems. Currently, the users on the IBM MVS and VM/CMS systems can use standard IBM commands to send files and mail to DEC VAX users and output devices, and they can receive files from the DEC VAX's as if they had been sent from other IBM systems; similarly, the DEC VAX users can use standard DEC commands to send files and mail to IBM users and output devices, and they can receive files from the IBM systems as if they had been sent from other DEC VAX systems. In fact, the VAXes can exchange files and mail among themselves via the IBM NJE-based network without the need for DECnet links between the VAXes. Because this integrated heterogeneous file transfer network uses the standard IBM peer-to-peer communications protocol, all of the Laboratory's IBM and DEC computers easily communicate with the approximately 170 other computers in the Bitnet university network. Plans call for further integration of existing HP 3000 systems and future word processing systems such as Exxon, NBI, or Wang; we believe it is vitally important to provide smooth paths into this network for users of personal desktop computers. 17 references.

  19. Heterogeneously integrated microsystem-on-a-chip

    DOE Patents [OSTI]

    Chanchani, Rajen (Albuquerque, NM)

    2008-02-26T23:59:59.000Z

    A microsystem-on-a-chip comprises a bottom wafer of normal thickness and a series of thinned wafers can be stacked on the bottom wafer, glued and electrically interconnected. The interconnection layer comprises a compliant dielectric material, an interconnect structure, and can include embedded passives. The stacked wafer technology provides a heterogeneously integrated, ultra-miniaturized, higher performing, robust and cost-effective microsystem package. The highly integrated microsystem package, comprising electronics, sensors, optics, and MEMS, can be miniaturized both in volume and footprint to the size of a bottle-cap or less.

  20. Macroeconomic Study of Construction Firm's Profitability Using Cluster Analysis

    E-Print Network [OSTI]

    Arora, Parth

    2012-10-19T23:59:59.000Z

    productivity and other important factors contributing gross margin at a state level. For this research, these factors were calculated for all the states in USA for the periods ending in 1997, 2002 and 2007. An attempt was then made to analyze the data... for 1997, 2002 and 2007. Construction worker wages per construction worker: Construction worker average wages is studied as one of the six dependent variables used in Model 1 of the research. It is calculated as: 5 Construction worker wages per...

  1. Privatising national oil companies: Assessing the impact on firm performance

    E-Print Network [OSTI]

    Wolf, C; Pollitt, Michael G.

    government having to cede majority control. Key words Privatisation, ownership, corporate performance, anticipation, oil and gas industry JEL Classifications: C23, G32, L33, L71, M20, Q40 2 I. Introduction The impact of ownership... privatisation date, accrue over time, and level off after the initial ownership change rather than accelerate. Details of residual government ownership, control transfer, and size and timing of follow-on offerings provide limited incremental explanatory power...

  2. Painting firm honored by Jefferson Lab (Daily Press) | Jefferson Lab

    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:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomassPPPO Website DirectoryCommunityFuture

  3. aquifer heterogeneity completion: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  4. aquifer heterogeneity final: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  5. axially heterogeneous core: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  6. aquifer property heterogeneity: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  7. analyzing heterogeneous samples: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  8. advanced heterogeneous catalysts: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  9. Heterogeneous Nucleation of Ice on Anthropogenic Organic Particles...

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

    Nucleation of Ice on Anthropogenic Organic Particles Collected in Mexico City. Heterogeneous Nucleation of Ice on Anthropogenic Organic Particles Collected in Mexico City....

  10. Heterogeneous ice nucleation and water uptake by field-collected...

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

    ice nucleation and water uptake by field-collected atmospheric particles below 273 K. Heterogeneous ice nucleation and water uptake by field-collected atmospheric particles below...

  11. Heterogeneous Structure Around the Jemez Volcanic Field, New...

    Open Energy Info (EERE)

    Heterogeneous Structure Around the Jemez Volcanic Field, New Mexico, USA, as Inferred from the Envelope Inversion of Active-Experiment Seismic Data Jump to: navigation, search...

  12. Colorado Firm Develops Innovative Materials for Geothermal Systems |

    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 1112011AT&T, Inc.'sEnergyTexas1. FeedstockCLEAN

  13. New research contract links LANL and robotics firm

    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)Integrated CodesTransparencyDOE Project Taps HPCNew User and DataNewstateConversionNew

  14. Coverage of Independent Audits of For-Profit Firms

    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 33 111 1,613PortsmouthBartlesvilleAbout » Contact Us ContactPractices inCostsCourseColumbiaCOVERAGE

  15. Local firms benefit from Jefferson Lab upgrade (Inside Business) |

    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 PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let usNucleartearing mode flowsLocalJefferson

  16. Local firms benefit from Jefferson Lab upgrade | Jefferson Lab

    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 PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let usNucleartearing mode

  17. Consideration of Firm Redirect from Original Unconditional Parent Methods

    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 Administration would like submitCollector/ReceiverConflictConsideration of Dynamical

  18. Colorado Firm Develops Innovative Materials for Geothermal Systems |

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

    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 742Energy China U.S. DepartmentEnergy This part governs the conductDevelopment |Department of

  19. SF6432-FP (02-01-12) Firm Fixed Price

    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 Scienceand Requirements RecentlyElectronicResourcesjobs RunningSEABRV2/01/12 Page 1 of2/01/12 Page

  20. SF6432-FP (02-01-12) Firm Fixed Price

    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 Scienceand Requirements RecentlyElectronicResourcesjobs RunningSEABRV2/01/12 Page 1 of2/01/12

  1. SF6432-FP (02-01-12) Firm Fixed Price

    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 Scienceand Requirements RecentlyElectronicResourcesjobs RunningSEABRV2/01/12 Page 1

  2. Primus Power Corporation Wind Firming EnergyFarm

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

    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 742EnergyOn April 23, 2014, an OHA AdministrativeofDepartmentEnergyLoan loss reserve (LLR)Primus

  3. Historical Average Priority Firm Power Rates (rates/previous)

    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 PowerCherries 82981-1cnHigh School football High SchoolBundles toHiring-TP59.01 C5;44 4

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

    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 PowerCherries 82981-1cnHigh SchoolIn12electron 9November 6,Bradbury Science Museum Januaryfor

  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. 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...

  14. Deconstruction and Reconstruction of Heterogeneous Electronic Product Catalogues for Semantic Interoperation

    E-Print Network [OSTI]

    Guo, Jingzhi

    if it understands "fridge" as "refrigerator". However, this inference may be wrong if "fridge" in Firm1 does not refer to "refrigerator". Firm2 cannot infer or understand the details of "fridge" specifi- cation

  15. Energy Conservation in Heterogeneous Server Clusters Taliver Heath

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Energy Conservation in Heterogeneous Server Clusters #3; Taliver Heath Dept. of Computer Science, measurement Keywords Energy conservation, server clusters, heterogeneity #3; This research has been supported.g., [3, 4, 9, 21]) and dynamic cluster recon#12;guration for energy conservation without per- formance

  16. The dynamics of chimera states in heterogeneous Kuramoto networks

    E-Print Network [OSTI]

    Laing, Carlo R.

    The dynamics of chimera states in heterogeneous Kuramoto networks Carlo R. Laing a a. Abstract We study a variety of mixed synchronous/incoherent ("chimera") states in sev- eral heterogeneous with one another, while the remainder are incoherent [7­15], referred to by Abrams et al. as "chimera

  17. On the Throughput Capacity of Heterogeneous Wireless Networks

    E-Print Network [OSTI]

    Latchman, Haniph A.

    On the Throughput Capacity of Heterogeneous Wireless Networks Pan Li, Member, IEEE, and Yuguang of wireless networks. However, it is commonly assumed that all nodes in the network are identical. The issue of heterogeneous wireless networks with general network settings. Specifically, we consider an extended network

  18. Periodic Solutions of a Nonlinear Evolution Problem from Heterogeneous Catalysis

    E-Print Network [OSTI]

    Bothe, Dieter

    Periodic Solutions of a Nonlinear Evolution Problem from Heterogeneous Catalysis Dieter Bothe for heterogeneous catalysis in a stirred multi-phase chemical reactor. Since the appearance of T-periodic feeds for this evolution problem are provided and applied to the class of reaction-diffusion systems mentioned above. AMS

  19. Heterogeneous Catalysis DOI: 10.1002/anie.201209476

    E-Print Network [OSTI]

    Kik, Pieter

    Heterogeneous Catalysis DOI: 10.1002/anie.201209476 Trends in the Binding Strength of Surface? These questions are at the heart of many fundamental and practical problems, ranging from heterogeneous catalysis to important applied processes con- nected to materials science. In particular the interaction of oxygen

  20. The Specification and Execution of Heterogeneous Synchronous Reactive Systems

    E-Print Network [OSTI]

    The Specification and Execution of Heterogeneous Synchronous Reactive Systems by Stephen Anthony in Engineering---Electrical Engineering and Computer Sciences in the GRADUATE DIVISION of the UNIVERSITY of Heterogeneous Synchronous Reactive Systems Copyright ã 1997 by Stephen Anthony Edwards #12; Abstract

  1. An Availability-Aware Task Scheduling Strategy for Heterogeneous Systems

    E-Print Network [OSTI]

    Xie, Tao

    An Availability-Aware Task Scheduling Strategy for Heterogeneous Systems Xiao Qin, Member, IEEE, and Tao Xie, Member, IEEE Abstract--High availability is a key requirement in the design and development of heterogeneous systems where processors operate at different speeds and are not continuously available

  2. Dynamic Resource Management in Energy Constrained Heterogeneous Computing

    E-Print Network [OSTI]

    Maciejewski, Anthony A.

    Dynamic Resource Management in Energy Constrained Heterogeneous Computing Systems Using Voltage) in a manner that exploits the heterogeneity of the resources and tasks while considering the energy the resources are wireless and mobile, the limited battery capacity becomes a constraint and power or energy

  3. OSCAR Parallelizing Compiler Cooperative Heterogeneous Multi-core Architecture

    E-Print Network [OSTI]

    Kasahara, Hironori

    OSCAR Parallelizing Compiler Cooperative Heterogeneous Multi-core Architecture Akihiro Hayashi,kamiyama,watanabe,takeshi,mase}@kasahara.cs.waseda.ac.jp 1. Background Heterogeneous multi-core architectures, which integrates multiple general purpose CPU, powerful parallelizing compiler for hetero- geneous multi-core architectures is expected. Furthermore

  4. On the Numerical Simulation of Waterflooding of Heterogeneous

    E-Print Network [OSTI]

    Furtado, Fred

    On the Numerical Simulation of Waterflooding of Heterogeneous Petroleum Reservoirs Jim Douglas, Jr Simulation of Waterflooding of Heterogeneous Petroleum Reservoirs · A two-stage operator-splitting allows consider as a model problem the two-phase immiscible displacement in petroleum reservoirs. A very detailed

  5. On the Numerical Simulation of Waterflooding of Heterogeneous

    E-Print Network [OSTI]

    Douglas Jr., Jim

    On the Numerical Simulation of Waterflooding of Heterogeneous Petroleum Reservoirs Jim Douglas, Jr displacement in petroleum reservoirs. A very detailed description of the numerical method is presented. Follow, 22290 Rio de Janeiro, RJ, Brazil #12; On the Numerical Simulation of Waterflooding of Heterogeneous

  6. Mining Competitive Relationships by Learning across Heterogeneous Networks

    E-Print Network [OSTI]

    Menczer, Filippo

    . Existing studies mainly focus on mining competitive relationships within a single data source, whileMining Competitive Relationships by Learning across Heterogeneous Networks Yang Yang , Jie Tang. In this paper, we study the problem of mining competitive rela- tionships by learning across heterogeneous

  7. Optimizing the Cost of an Heterogeneous Distributed Platform

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Optimizing the Cost of an Heterogeneous Distributed Platform Jean-Marc Nicod, Laurent Philippe [nicod,philippe,sabbah]@lifc.univ-fcomte.fr Abstract--Distributed platforms become heterogeneous in more. For production grids and factories, it is mandatory to control and optimize the economic cost of a such platforms

  8. Dynamic Lung Morphology of Methacholine-Induced Heterogeneous Bronchoconstriction

    E-Print Network [OSTI]

    Dynamic Lung Morphology of Methacholine-Induced Heterogeneous Bronchoconstriction Ben T. Chen and G). The method provides direct visualization of the venti- lated regions within the lung. Heterogeneous bronchoconstric- tion following the i.v. MCh injection was evident using this technique. These 3 He dynamic lung

  9. DESCRIPTION OF HETEROGENEOUS USING PRESSURE AND TRACER DATA

    E-Print Network [OSTI]

    Stanford University

    DESCRIPTION OF HETEROGENEOUS RESERVOIRS USING PRESSURE AND TRACER DATA A DISSERTATION SUBMITTED of characterizing areally heterogeneous reservoirs through the interpretation of pressure data and tracer data for the selected reservoir model, increases the tolerance to noise in the data, increases the confidence

  10. Dynamics on modular networks with heterogeneous correlations

    SciTech Connect (OSTI)

    Melnik, Sergey [MACSI, Department of Mathematics and Statistics, University of Limerick (Ireland) [MACSI, Department of Mathematics and Statistics, University of Limerick (Ireland); Oxford Centre for Industrial and Applied Mathematics, Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom); CABDyN Complexity Centre, University of Oxford, Oxford OX1 1HP (United Kingdom); Porter, Mason A. [Oxford Centre for Industrial and Applied Mathematics, Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom) [Oxford Centre for Industrial and Applied Mathematics, Mathematical Institute, University of Oxford, Oxford OX2 6GG (United Kingdom); CABDyN Complexity Centre, University of Oxford, Oxford OX1 1HP (United Kingdom); Mucha, Peter J. [Department of Mathematics, Carolina Center for Interdisciplinary Applied Mathematics, University of North Carolina, Chapel Hill, North Carolina 27599-3250 (United States) [Department of Mathematics, Carolina Center for Interdisciplinary Applied Mathematics, University of North Carolina, Chapel Hill, North Carolina 27599-3250 (United States); Institute for Advanced Materials, Nanoscience and Technology, University of North Carolina, Chapel Hill, North Carolina 27599-3216 (United States); Gleeson, James P. [MACSI, Department of Mathematics and Statistics, University of Limerick (Ireland)] [MACSI, Department of Mathematics and Statistics, University of Limerick (Ireland)

    2014-06-15T23:59:59.000Z

    We develop a new ensemble of modular random graphs in which degree-degree correlations can be different in each module, and the inter-module connections are defined by the joint degree-degree distribution of nodes for each pair of modules. We present an analytical approach that allows one to analyze several types of binary dynamics operating on such networks, and we illustrate our approach using bond percolation, site percolation, and the Watts threshold model. The new network ensemble generalizes existing models (e.g., the well-known configuration model and Lancichinetti-Fortunato-Radicchi networks) by allowing a heterogeneous distribution of degree-degree correlations across modules, which is important for the consideration of nonidentical interacting networks.

  11. 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 ...

  12. Accelerating Subsurface Transport Simulation on Heterogeneous Clusters

    SciTech Connect (OSTI)

    Villa, Oreste; Gawande, Nitin A.; Tumeo, Antonino

    2013-09-23T23:59:59.000Z

    Reactive transport numerical models simulate chemical and microbiological reactions that occur along a flowpath. These models have to compute reactions for a large number of locations. They solve the set of ordinary differential equations (ODEs) that describes the reaction for each location through the Newton-Raphson technique. This technique involves computing a Jacobian matrix and a residual vector for each set of equation, and then solving iteratively the linearized system by performing Gaussian Elimination and LU decomposition until convergence. STOMP, a well known subsurface flow simulation tool, employs matrices with sizes in the order of 100x100 elements and, for numerical accuracy, LU factorization with full pivoting instead of the faster partial pivoting. Modern high performance computing systems are heterogeneous machines whose nodes integrate both CPUs and GPUs, exposing unprecedented amounts of parallelism. To exploit all their computational power, applications must use both the types of processing elements. For the case of subsurface flow simulation, this mainly requires implementing efficient batched LU-based solvers and identifying efficient solutions for enabling load balancing among the different processors of the system. In this paper we discuss two approaches that allows scaling STOMP's performance on heterogeneous clusters. We initially identify the challenges in implementing batched LU-based solvers for small matrices on GPUs, and propose an implementation that fulfills STOMP's requirements. We compare this implementation to other existing solutions. Then, we combine the batched GPU solver with an OpenMP-based CPU solver, and present an adaptive load balancer that dynamically distributes the linear systems to solve between the two components inside a node. We show how these approaches, integrated into the full application, provide speed ups from 6 to 7 times on large problems, executed on up to 16 nodes of a cluster with two AMD Opteron 6272 and a Tesla M2090 per node.

  13. Top Management Team Personal Wealth, Within-Team Diversity and the Implications for Firm-Level Risk Taking 

    E-Print Network [OSTI]

    Campbell, Joanna

    2012-07-16T23:59:59.000Z

    , Melanie Harris, Alex and Marina Petkevich, Traci Boyle, Gosia Krauze-Kociszewska, and Magdalena Wasilewska. Thank you to my friends in Oxford, OH ? Maria and Brandon Flessner, Mirabai McCarthy, Jeremiah Jonaitis, Laura Klein, and Jess and Steve... the issues associated with top executives and how they manage their organizations ? agency theory and upper echelons theory. Agency theory (Jensen & Meckling, 1976) emerged from the writings of early managerialists (Berle & Means, 1932), and is primarily...

  14. The environmental effects of expanded trade: a firm-level simulation analysis o investment in Texas grapefruit

    E-Print Network [OSTI]

    Elmer,Nicole Audra

    1997-01-01T23:59:59.000Z

    This research is about the future of the Texas citrus industry and, in particular, whether rapid growth and development associated with expanded trade are likely to be significant factors affecting future investment in the industry. The Dixit...

  15. The pros and cons of corruption of firm performance : a micro-level study of businesses in Indonesia

    E-Print Network [OSTI]

    Murdaya, Karuna

    2005-01-01T23:59:59.000Z

    Over the past 10 years, different international organization and NGO's have given birth to a whole host of different anti corruption programs in response to the recent "endemic" of corruption which is seen to plague ...

  16. Top Management Team Personal Wealth, Within-Team Diversity and the Implications for Firm-Level Risk Taking

    E-Print Network [OSTI]

    Campbell, Joanna

    2012-07-16T23:59:59.000Z

    follows the style of Academy of Management Journal. 2 reflections of their top management teams, or the upper echelon of the organization (Hambrick, 2007; Hambrick & Mason, 1984). According to this theory, top managers? characteristics influence...

  17. Impact of demand-enhancing farm policy on the agricultural sector: a firm level simulation of ethanol production subsidies

    E-Print Network [OSTI]

    Wasson, Leta Susanne

    1990-01-01T23:59:59.000Z

    U. S. Fuel Ethanol Production 2. 4 Dry Milling Process 2. 5 Wet Milling Process 22 27 29 30 CHAPTER I INTRODUCTION A ricultural Polic Sett'n Agriculture has long been an industry of instability. Commodity surpluses along with low prices... of reducing stocks. Arguments against demand enhancement state that this sort of policy will do nothing more than increase the already large U. S. stocks of commodities. Proponents of demand enhancement see such policies as a means of reducing surpluses...

  18. Comparisons of empirical viscous-fingering models and their calibration for heterogeneous problems

    SciTech Connect (OSTI)

    Fayers, F.J.; Blunt, M.J.; Christie, M.A. (BP Research Center (GB))

    1992-05-01T23:59:59.000Z

    This paper reviews the formulation and parameters for three principal empirical viscous-fingering models: the Kovl, Todd and Longstaff, and Fayers methods. All three methods give similar levels of accuracy when compared with linear homogeneous experiments, but they differ in performance in 2D applications. This arises from differences in the formulation of the total mobility terms. The superiority of the Todd and Longstaff and Fayers methods is demonstrated for 2D and gravity-influenced flows by comparison with experiments and high-resolution simulation. The use of high-resolution simulation to calibrate empirical models in a systematic manner is described. Results from detailed simulation demonstrate the sensitivity of empirical model parameters to viscous/gravity ratio, recovery process (secondary, tertiary, or water-alternating-gas (WAG)), and geological heterogeneity. For large amplitude heterogeneities with short correlation lengths, the accuracy of the empirical models is shown to be less satisfactory, but improved by the addition of a diffusive term.

  19. Evidence for locus heterogeneity in autosomal dominant limb-girdle muscular dystrophy

    SciTech Connect (OSTI)

    Speer, M.C.; Stajich, J.M.; Gaskell, P.C. [Duke Univ. Medical School, Durham, NC (United States)] [and others

    1995-12-01T23:59:59.000Z

    Limb-girdle muscular dystrophy (LGMD) is a diagnostic classification encompassing a broad group of proximal myopathies. A gene for the dominant form of LGMD (LGMD1A) has recently been localized to a 7-cM region of chromosome 5q between D5S178 and IL9. We studied three additional dominant LGMD families for linkage to these two markers and excluded all from localization to this region, providing evidence for locus heterogeneity within the dominant form of LGMD. Although the patterns of muscle weakness were similar in all families studied, the majority of affected family members in the chromosome 5-linked pedigree have a dysarthric speech pattern, which is not present in any of the five unlinked families. The demonstration of heterogeneity within autosomal dominant LGMD is the first step in attempting to subclassify these families with similar clinical phenotypes on a molecular level. 33 refs., 1 fig., 2 tabs.

  20. IMPACTS OF SOURCE TERM HETEROGENEITIES ON WATER PATHWAY DOSE.

    SciTech Connect (OSTI)

    SULLIVAN, T.; GUSKOV, A.; POSKAS, P.; RUPERTI, N.; HANUSIK, V.; ET AL.

    2004-09-15T23:59:59.000Z

    Radioactive sealed sources are used extensively throughout the world in different field and various activities such as medicine, agriculture, industry, research, education military applications, as well as nuclear facilities. The International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation sources [1] defines a sealed source as ''radioactive material that is (a) permanently sealed in capsule or (b) closely bounded and in a solid form. The capsule or material of sealed source shall be strong enough to maintain remain leak free under the conditions of use and wear for which the source was designed, also under foreseeable mishaps''. When a radioactive sealed source is no longer needed, or becomes unfit for the intended application it is considered spent. A spent sealed source is not necessarily a waste because it can be used in other applications. If for any technical or economic reason (decay, obsolete equipment and technique, worn out equipment) no further use is foreseen, the spent sealed source is considered spent and becomes radioactive waste [2] [3]. In addition, a source may be taken out of service temporarily or indefinitely. In this case the source is out of used (''disused'') but not considered spent [4]. Sources that are not in active use and have not being declared as spent are considered as disused sealed sources [4]. Considering the potential radiation hazards associated with such waste it has to be managed and disposed of in a way that will ensure that the potential radiation hazards are adequately managed and controlled in compliance with the appropriate safety principles and criteria. It is recognized that there exists today experience and means for all steps in the management of disused sealed sources, except disposal of [2]. In many countries, disused sealed sources represent a part of the radioactive waste inventory being characterized generally with high specific activities and small physical sizes and for which a solution has to be found in term of long-term disposal. Together with their casing and packaging, they are one form of heterogeneous waste; many other forms of waste with heterogeneous properties exist. They may arise in very small quantities and with very specific characteristics in the case of small producers, or in larger streams with standard characteristics in others. This wide variety of waste induces three main different levels of waste heterogeneity: (1) hot spot (e.g. disused sealed sources); (2) large item inside a package (e.g. metal components); and (3) very large items to be disposed of directly in the disposal unit (e.g. irradiated pipes, vessels). Safety assessments generally assume a certain level of waste homogeneity in most of the existing or proposed disposal facilities. There is a need to evaluate the appropriateness of such an assumption and the influence on the results of safety assessment. This need is especially acute in the case of sealed sources. There are many cases where are storage conditions are poor, or there is improper management leading to a radiological accident, some with significant or detrimental impacts. Disposal in a near surface disposal facility has been used in the past for some disused sealed sources. This option is currently in use for others sealed sources, or is being studied for the rest of them. The regulatory framework differs greatly between countries. In some countries, large quantities of disused sealed sources have been disposed of without any restriction, in others their disposal is forbidden by law. In any case, evaluation of the acceptability of disposal of disused sealed sources in near surface disposal facility is of utmost importance.

  1. Epistemic levels

    E-Print Network [OSTI]

    Greco, Daniel (Daniel Louis)

    2012-01-01T23:59:59.000Z

    In this dissertation I defend some controversial "level-bridging" principles in epistemology. In the first chapter, I defend the KK principle-the principle that if one knows that P, then one knows that one knows that P. I ...

  2. 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

  3. Molecular Active Sites in Heterogeneous Ir-La/C Catalyzed Carbonylatio...

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

    Molecular Active Sites in Heterogeneous Ir-LaC Catalyzed Carbonylation of Methanol to Acetates. Molecular Active Sites in Heterogeneous Ir-LaC Catalyzed Carbonylation of Methanol...

  4. Towards a multifrontal QR factorization for heterogeneous architectures over runtime systems

    E-Print Network [OSTI]

    Uçar, Bora

    , computer architectures for high performance computing have considerably evolved toward heterogeneous. An example of popular heterogeneous architectures widely adopted in the high performance computing domain

  5. 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 ...

  6. Heterogeneous recurrence monitoring and control of nonlinear stochastic processes

    SciTech Connect (OSTI)

    Yang, Hui, E-mail: huiyang@usf.edu; Chen, Yun [Complex Systems Monitoring, Modeling and Analysis Laboratory, University of South Florida, Tampa, Florida 33620 (United States)] [Complex Systems Monitoring, Modeling and Analysis Laboratory, University of South Florida, Tampa, Florida 33620 (United States)

    2014-03-15T23:59:59.000Z

    Recurrence is one of the most common phenomena in natural and engineering systems. Process monitoring of dynamic transitions in nonlinear and nonstationary systems is more concerned with aperiodic recurrences and recurrence variations. However, little has been done to investigate the heterogeneous recurrence variations and link with the objectives of process monitoring and anomaly detection. Notably, nonlinear recurrence methodologies are based on homogeneous recurrences, which treat all recurrence states in the same way as black dots, and non-recurrence is white in recurrence plots. Heterogeneous recurrences are more concerned about the variations of recurrence states in terms of state properties (e.g., values and relative locations) and the evolving dynamics (e.g., sequential state transitions). This paper presents a novel approach of heterogeneous recurrence analysis that utilizes a new fractal representation to delineate heterogeneous recurrence states in multiple scales, including the recurrences of both single states and multi-state sequences. Further, we developed a new set of heterogeneous recurrence quantifiers that are extracted from fractal representation in the transformed space. To that end, we integrated multivariate statistical control charts with heterogeneous recurrence analysis to simultaneously monitor two or more related quantifiers. Experimental results on nonlinear stochastic processes show that the proposed approach not only captures heterogeneous recurrence patterns in the fractal representation but also effectively monitors the changes in the dynamics of a complex system.

  7. 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...

  8. The building blocks of dynamical heterogeneities in dense granular media

    E-Print Network [OSTI]

    R. Candelier; O. Dauchot; G. Biroli

    2009-01-22T23:59:59.000Z

    We investigate experimentally the connection between short time dynamics and long time dynamical heterogeneities within a dense granular media under cyclic shear. We show that dynamical heterogeneities result from a two timescales process. Short time but already collective events consisting in clustered cage jumps concentrate most of the non affine displacements. On larger timescales such clusters appear aggregated both temporally and spatially in avalanches which eventually build the large scales dynamical heterogeneities. Our results indicate that facilitation plays an important role in the relaxation process although it does not appear to be conserved as proposed in many models studied in the literature.

  9. 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 ...

  10. 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 ...

  11. 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 ...

  12. Market Entry Costs, Producer Heterogeneity, and Export Dynamics Sanghamitra Das

    E-Print Network [OSTI]

    Sadoulet, Elisabeth

    As the exchange rate, foreign demand, production costs and export promotion policies evolve, manufacturing firms-exporting. Thus, while history and expectations matter for a few marginal producers, most of the aggregate export response to a change in the exchange rate regime comes from volume adjustments among large incumbents

  13. Empirical Essays on the Efficiency of Heterogeneous Good Auction

    E-Print Network [OSTI]

    Martin, Thomas A., IV

    2010-01-14T23:59:59.000Z

    to a multi-good setting, performs poorly in the presence of such a value structure. The setting for this analysis is an auction for financial transmission rights held in Texas in 2002. The auction involved twenty two firms and collected almost $70...

  14. Quantitative tumor heterogeneity assessment on a nuclear population

    E-Print Network [OSTI]

    Quantitative tumor heterogeneity assessment on a nuclear population basis Anne-Sofie Wessel score in this area was performed. 110 of the 226 TMA cores were scored by a pathologist. The automatic

  15. Well Productivity Enhancement of High Temperature Heterogeneous Carbonate Reservoirs

    E-Print Network [OSTI]

    Wang, Guanqun

    2014-05-08T23:59:59.000Z

    Acidizing is one of the most popular techniques for well productivity enhancement during oil and gas production. However, the treatment method is not very effective when the wellbore penetrates through multiple layers of heterogeneous reservoirs...

  16. Mapping parallel programs to heterogeneous multi-core systems 

    E-Print Network [OSTI]

    Grewe, Dominik

    2014-06-27T23:59:59.000Z

    Heterogeneous computer systems are ubiquitous in all areas of computing, from mobile to high-performance computing. They promise to deliver increased performance at lower energy cost than purely homogeneous, CPU-based ...

  17. Heterogeneous-race-free Memory Models Derek R. Hower

    E-Print Network [OSTI]

    Wood, David A.

    1 Heterogeneous-race-free Memory Models Derek R. Hower , Blake A. Hechtman§ , Bradford M. Beckmann Electrical and Computer Engineering University of Wisconsin-Madison Computer Sciences {derek.hower, brad

  18. Structure, Thermodynamics and Kinetics of Chemically Heterogeneous Interfaces

    E-Print Network [OSTI]

    Palafox Hernandez, Jesus Pablo

    2011-08-31T23:59:59.000Z

    ), and a metal alloy interface (Cu-Pb). In both systems, interfacial prefreezing (crystal formation above the melting point of the fluid) was observed and this prefreezing was seen to promote heterogeneous nucleation, when the systems were cooled below...

  19. An Intelligent Threat Prevention Framework with Heterogeneous Information

    E-Print Network [OSTI]

    Liu, Weiru

    An Intelligent Threat Prevention Framework with Heterogeneous Information Wenjun Ma 1 and Weiru Liu 1 Abstract. Three issues usually are associated with threat prevention intelligent surveillance, the de- mand of effectively predicting suspects' intention and ranking the potential threats posed

  20. Simulation and design optimization of wave propagation in heterogeneous materials

    E-Print Network [OSTI]

    Saà-Seoane, Joel

    2014-01-01T23:59:59.000Z

    Propagation of waves through heterogeneous structured materials has been the focus of considerable research in recent years. These materials consist of quasi periodic geometries combining two or more piecewise homogeneous ...

  1. Discrete Feature Approach for Heterogeneous Reservoir Production Enhancement

    SciTech Connect (OSTI)

    Dershowitz, William S.; Curran, Brendan; Einstein, Herbert; LaPointe, Paul; Shuttle, Dawn; Klise, Kate

    2002-07-26T23:59:59.000Z

    The report presents summaries of technology development for discrete feature modeling in support of the improved oil recovery (IOR) for heterogeneous reservoirs. In addition, the report describes the demonstration of these technologies at project study sites.

  2. PARTITIONED ANALYSIS FOR DIMENSIONALLY-HETEROGENEOUS HYDRAULIC NETWORKS*

    E-Print Network [OSTI]

    Buscaglia, Gustavo C.

    PARTITIONED ANALYSIS FOR DIMENSIONALLY-HETEROGENEOUS HYDRAULIC NETWORKS* JORGE S. LEIVA , PABLO J for which this procedure is envisaged arises when modeling hydraulic networks in which complex and simple

  3. Effective hydraulic conductivity of bounded, strongly heterogeneous porous media

    E-Print Network [OSTI]

    Tartakovsky, Daniel M.

    Effective hydraulic conductivity of bounded, strongly heterogeneous porous media Evangelos K of Arizona, Tucson Abstract. We develop analytical expressions for the effective hydraulic conductivity Ke boundaries. The log hydraulic conductivity Y forms a Gaussian, statistically homogeneous and anisotropic

  4. Magnetically-Assisted Statistical Assembly - a new heterogeneous integration technique

    E-Print Network [OSTI]

    Fonstad, Clifton G. Jr.

    This paper presents a new technique for the monolithic heterogeneous integration of compound semiconductor devices with silicon integrated circuits, and establishes the theoretical foundation for a key element of the ...

  5. Increasing Stability Reduces Conformational Heterogeneity in a Protein Folding

    E-Print Network [OSTI]

    Increasing Stability Reduces Conformational Heterogeneity in a Protein Folding Intermediate, the results show that protein folding intermediates are ensembles of different structural forms direct experi- mental evidence in support of a basic tenet of energy landscape theory for protein folding

  6. Entrainment of heterogeneous glycolytic oscillations in single cells

    E-Print Network [OSTI]

    Gustavsson, A -K; Mehlig, B; Goksör, M

    2015-01-01T23:59:59.000Z

    Cell signaling, gene expression, and metabolism are affected by cell-cell heterogeneity and random changes in the environment. The effects of such fluctuations on cell signaling and gene expression have recently been studied intensively using single-cell experiments. In metabolism heterogeneity may be particularly important because it may affect synchronisation of metabolic oscillations, an important example of cell-cell communication. This synchronisation is notoriously difficult to describe theoretically as the example of glycolytic oscillations shows: neither is the mechanism of glycolytic synchronisation understood nor the role of cell-cell heterogeneity. To pin down the mechanism and to assess its robustness and universality we have experimentally investigated the entrainment of glycolytic oscillations in individual yeast cells by periodic external perturbations. We find that oscillatory cells synchronise through phase shifts and that the mechanism is insensitive to cell heterogeneity (robustness) and si...

  7. Heterogeneous-k-core versus Bootstrap Percolation on Complex Networks

    E-Print Network [OSTI]

    G. J. Baxter; S. N. Dorogovtsev; A. V. Goltsev; J. F. F. Mendes

    2010-12-20T23:59:59.000Z

    We introduce the heterogeneous-$k$-core, which generalizes the $k$-core, and contrast it with bootstrap percolation. Vertices have a threshold $k_i$ which may be different at each vertex. If a vertex has less than $k_i$ neighbors it is pruned from the network. The heterogeneous-$k$-core is the sub-graph remaining after no further vertices can be pruned. If the thresholds $k_i$ are $1$ with probability $f$ or $k \\geq 3$ with probability $(1-f)$, the process forms one branch of an activation-pruning process which demonstrates hysteresis. The other branch is formed by ordinary bootstrap percolation. We show that there are two types of transitions in this heterogeneous-$k$-core process: the giant heterogeneous-$k$-core may appear with a continuous transition and there may be a second, discontinuous, hybrid transition. We compare critical phenomena, critical clusters and avalanches at the heterogeneous-$k$-core and bootstrap percolation transitions. We also show that network structure has a crucial effect on these processes, with the giant heterogeneous-$k$-core appearing immediately at a finite value for any $f > 0$ when the degree distribution tends to a power law $P(q) \\sim q^{-\\gamma}$ with $\\gamma < 3$.

  8. The heterogeneous gas with singular interaction: Generalized circular law and heterogeneous renormalized energy

    E-Print Network [OSTI]

    Luis Carlos Garcia del Molino; Khashayar Pakdaman; Jonathan Touboul

    2014-10-26T23:59:59.000Z

    We introduce and analyze $d$ dimensional Coulomb gases with random charge distribution and general external confining potential. We show that these gases satisfy a large deviations principle. The analysis of the minima of the rate function (which is the leading term of the energy) reveals that at equilibrium, the particle distribution is a generalized circular law (i.e. with spherical support but non-necessarily uniform distribution). In the classical electrostatic external potential, there are infinitely many minimizers of the rate function. The most likely macroscopic configuration is a disordered distribution in which particles are uniformly distributed (for $d=2$, the circular law), and charges are independent of the positions of the particles. General charge-dependent confining potentials unfold this degenerate situation: in contrast, the particle density is not uniform, and particles spontaneously organize according to their charge. In that picture the classical electrostatic potential appears as a transition at which order is lost. Sub-leading terms of the energy are derived: we show that these are related to an operator, generalizing the Coulomb renormalized energy, which incorporates the heterogeneous nature of the charges. This heterogeneous renormalized energy informs us about the microscopic arrangements of the particles, which are non-standard, strongly depending on the charges, and include progressive and irregular lattices.

  9. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from ENSDF

  10. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from

  11. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2 O

  12. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2 O3

  13. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2 O3Be

  14. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2

  15. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2B

  16. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2BBe

  17. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li from2BBeNe

  18. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4Li

  19. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiB from

  20. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiB fromC

  1. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiB fromCNe

  2. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiB fromCNe9

  3. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiB fromCNe9C

  4. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiB

  5. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiBN from

  6. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiBN from5 H

  7. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiBN from5 H6

  8. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiBN from5

  9. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiBN from58 C

  10. Energy Levels

    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, 2000Consumption Survey (CBECS) Data 210 Available in4LiBN from58

  11. Two-Level Mortar Domain Decomposition Preconditioners for Heterogeneous Elliptic Problems

    E-Print Network [OSTI]

    Arbogast, Todd

    to the domain, which is written in mixed form, i.e., as a system of two first order equations plus the boundary pressure, u is the (Darcy) velocity, and the coefficient a is the permeability. The permeability is often, such as CO2 sequestration, nuclear waste storage, and oil and natural gas production. Furthermore, the flow

  12. Probing the catalytic activity and heterogeneity of Au-nanoparticles at the single-molecule level

    E-Print Network [OSTI]

    Chen, Peng

    electricity from solar or fuel cells.16,20,21,32­38 The modern nanocatalysts, especially for solar and fuel cells, are still far from optimal for sustainable applications, however.39 Intense efforts have thus

  13. 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)

  14. 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

  15. Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations

    SciTech Connect (OSTI)

    Englert, A.; Hubbard, S.S.; Williams, K.H.; Li, L.; Steefel, C.I.

    2009-04-15T23:59:59.000Z

    For guiding optimal design and interpretation of in-situ treatments that strongly perturb subsurface systems, knowledge about the spatial and temporal patterns of mass transport and reaction intensities are important. Here, a procedure was developed and applied to time-lapse concentrations of a conservative tracer (bromide), an injected amendment (acetate) and reactive species (iron(II), uranium(VI) and sulfate) associated with two field scale biostimulation experiments, which were conducted successively at the same field location over two years. The procedure is based on a temporal moment analysis approach that relies on a streamtube approximation. The study shows that biostimulated reactions can be considerably influenced by subsurface hydrological and geochemical heterogeneities: the delivery of bromide and acetate and the intensity of the sulfate reduction is interpreted to be predominantly driven by the hydrological heterogeneity, while the intensity of the iron reduction is interpreted to be primarily controlled by the geochemical heterogeneity. The intensity of the uranium(VI) reduction appears to be impacted by both the hydrological and geochemical heterogeneity. Finally, the study documents the existence of feedbacks between hydrological heterogeneity and remediation-induced biogeochemical transformations at the field scale, particularly the development of precipitates that may cause clogging and flow rerouting.

  16. 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.

  17. Acoustic excitations and elastic heterogeneities in disordered solids

    E-Print Network [OSTI]

    Hideyuki Mizuno; Stefano Mossa; Jean-Louis Barrat

    2014-03-26T23:59:59.000Z

    In the recent years, much attention has been devoted to the inhomogeneous nature of the mechanical response at the nano-scale in disordered solids. Clearly, the elastic heterogeneities that have been characterized in this context are expected to strongly impact the nature of the sound waves which, in contrast to the case of perfect crystals, cannot be completely rationalized in terms of phonons. Building on previous work on a toy model showing an amorphisation transition [Mizuno H, Mossa S, Barrat JL (2013) EPL {\\bf 104}:56001], we investigate the relationship between sound waves and elastic heterogeneities in a unified framework, by continuously interpolating from the perfect crystal, through increasingly defective phases, to fully developed glasses. We provide strong evidence of a direct correlation between sound waves features and the extent of the heterogeneous mechanical response at the nano-scale.

  18. An experimental investigation of viscous fingering in heterogeneous porous media

    SciTech Connect (OSTI)

    Brock, D.C.

    1991-01-01T23:59:59.000Z

    The growth of viscous fingers in heterogeneous porous media was examined using flow visualization experiments in four different glass bead packs with different permeability heterogeneities: a uniform permeability model, one with two equal-width layers in the flow direction, one with a thin, high permeability streak in the flow direction, and one with blocks of different permeabilities. The experiments were compared with numerical simulations, paying particular attention to finger growth mechanisms, finger sizes and locations, and number of fingers. In near-homogeneous model displacements, fingers were observed to grow through the mechanisms of spreading, splitting, shielding, and coalescence. In all experiments, shielding and coalescence acted to reduce the number of fingers as flow progressed. Analysis of pressure distributions in and around fingers indicates that viscous crossflow was the driving force for the finger growth mechanisms. Simulations of the experiments yielded finger patterns similar to those observed in the experiments. The general agreement over a variety of mobility ratios and rates indicates that the simulator used captures the essential features of the physics of finger growth. In heterogeneous permeability fields, locations of fingers were largely determined by the pattern of heterogeneity. In the model with two thick layers and the model with blocks of different permeabilities, a pattern of viscous fingers was superimposed on the fronts. The model with a thin, high permeability streak showed very little viscous fingering because the width of the layer was small. In the heterogeneous cases, simulations yielded finger patterns remarkably similar to those observed in experiments. In particular, simulations reproduced the concept of viscous fingers overlain on flow affected by permeability heterogeneity.

  19. Efficient Network Structures with Separable Heterogeneous Connection Costs

    E-Print Network [OSTI]

    Heydari, Babak; Dalili, Kia

    2015-01-01T23:59:59.000Z

    We introduce a heterogeneous connection model for network formation to capture the effect of cost heterogeneity on the structure of efficient networks. In the proposed model, connection costs are assumed to be separable, which means the total connection cost for each agent is uniquely proportional to its degree. For these sets of networks, we provide the analytical solution for the efficient network and discuss stability impli- cations. We show that the efficient network exhibits a core-periphery structure, and for a given density, we find a lower bound for clustering coefficient of the efficient network.

  20. WHAT DO THREAT LEVELS AND RESPONSE LEVELS MEAN? THREAT LEVELS

    E-Print Network [OSTI]

    Edinburgh, University of

    WHAT DO THREAT LEVELS AND RESPONSE LEVELS MEAN? THREAT LEVELS: The UK Threat Level is decided by the Government's Joint Terrorism Analysis Centre (JTAC). It is the system to assess the threat to the UK from Threat Levels: Low - an attack is unlikely Moderate - an attack is possible, but not likely Substantial

  1. Computational Spectroscopy of Heterogeneous Interfaces | Argonne Leadership

    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 for4,645 3,625govInstrumentstdmadapInactiveVisiting theCommercialization and Innovation2010CompositionalChemistry forScience

  2. Majority-vote model with heterogeneous agents on square lattice

    E-Print Network [OSTI]

    Lima, F W S

    2013-01-01T23:59:59.000Z

    We study a nonequilibrium model with up-down symmetry and a noise parameter $q$ known as majority-vote model of M.J. Oliveira 1992 with heterogeneous agents on square lattice. By Monte Carlo simulations and finite-size scaling relations the critical exponents $\\beta/\

  3. HETEROGENEOUS MULTIPROCESSOR MAPPING FOR REAL-TIME STREAMING SYSTEMS

    E-Print Network [OSTI]

    Gerstlauer, Andreas

    address the problem of multi-objective mapping of SDF graphs onto heterogeneous multi-processor platforms can be modeled by synchronous data flow (SDF) graphs [1]. Multiprocessor mapping of an SDF graph were focused on SDF mapping on homogeneous multiprocessors [1][2]. More recent ap- proaches have

  4. Examining Energy Use in Heterogeneous Archival Storage Systems

    E-Print Network [OSTI]

    Polyzotis, Neoklis (Alkis)

    Examining Energy Use in Heterogeneous Archival Storage Systems Ian F. Adams*, Ethan L. Miller to consume upwards of 35% the total energy used [2]. As systems grow to encompass thousands of storage to power and cool storage devices, and energy costs are no longer the only issues--data center architects

  5. Towards Cooperation of Heterogeneous, Autonomous Robots: A Case Study of

    E-Print Network [OSTI]

    Stryk, Oskar von

    in industrial and research applications the need to execute successfully challenging missions and tasks has also computing capabil- ities. Several applications have been investigated with robots, which differ only are classified as weakly or strongly heterogeneous. An application with a strongly heteroge- neous robot team has

  6. Practical Experience in the Numerical Dangers of Heterogeneous Computing

    E-Print Network [OSTI]

    Dongarra, Jack

    in writing reliable numerical library software for heterogeneous computing environments. Although a lot ways to avoid potential pitfalls, or if that is not possible, we recommend that the software;1. INTRODUCTION There are special challenges associated with writing reliable numerical software on networks

  7. A Resources Virtualization Approach Supporting Uniform Access to Heterogeneous

    E-Print Network [OSTI]

    Keinan, Alon

    A Resources Virtualization Approach Supporting Uniform Access to Heterogeneous Grid Resources1 of resources such as computing resources, storage resources, instrument resources, data resources, etc. However, because of the differences of formats, descriptions, structures, and access modes of these resources, grid

  8. Energy-Efficient Data Gathering in Heterogeneous Wireless Sensor Networks

    E-Print Network [OSTI]

    Cardei, Mihaela

    1 Energy-Efficient Data Gathering in Heterogeneous Wireless Sensor Networks Wael Awada and Mihaela of energy constrained wireless sensor nodes. Sensor nodes are deployed randomly to monitor a number of targets. Since targets are redundantly covered by more sensors, in order to conserve energy resources, we

  9. Cellubrevin-targeted Fluorescence Uncovers Heterogeneity in the Recycling Endosomes*

    E-Print Network [OSTI]

    Machen, Terry E.

    Cellubrevin-targeted Fluorescence Uncovers Heterogeneity in the Recycling Endosomes* (Received, University of California, Berkeley, California 94720-3200 The pH and trafficking of recycling endosomes have-enriched recycling endosomes (pHCb) and FITC-transferrin to measure the pH of transferrin- enriched recycling

  10. Scale-dependent seismic velocity in heterogeneous media

    SciTech Connect (OSTI)

    Mukerji, T.; Mavko, G.; Mujica, D. [Stanford Univ., CA (United States)] [Stanford Univ., CA (United States); Lucet, N. [IFP, Rueil-Malmaison (France)] [IFP, Rueil-Malmaison (France)

    1995-07-01T23:59:59.000Z

    The measurable traveltime of seismic events propagating in heterogeneous media depend on the geologic scale, the seismic wavelength, and the propagation distance. In general, the velocity inferred from arrival times is slower when the wavelength is longer than the scale of heterogeneity and faster when the wavelength is shorter. For normal incidence propagation in stratified media, this is the difference between averaging elastic compliance sin the long wavelength limit. In two and three dimensions there is also the path effect. Shorter wavelengths tend to find faster paths, thus biasing the traveltimes to lower values. In the shorter wavelength limit, the slowness inferred from the average traveltime is smaller than the mean slowness of the medium. When the propagation distance is much larger than the scale of the heterogeneity, the path effect causes the velocity increase from long to short wavelengths to be much larger in two dimensions than in one dimension, and even larger in three dimensions. The amount of velocity dispersion can be understood theoretically, but there is some discrepancy between theory and experiment as to what ratio of wavelength to heterogeneity scale separates the long and short wavelength limits. The scale-dependent traveltime implies that a measured velocity depends not just on rock properties, but also on the scale of the measurement relative to he scale of the geology.

  11. Effect of Land Surface Heterogeneity on Satellite Near-

    E-Print Network [OSTI]

    Walker, Jeff

    in regulating the energy and water balance at the soil surface and it is therefore a crucial variable for many. SMOS will carry an L-band (1.4GHz) microwave radiometer and will provide near-surface soil moisture highly heterogeneous land surface conditions. The principal objectives of this research are to (i) test

  12. Chimera states in heterogeneous networks Carlo R. Laing

    E-Print Network [OSTI]

    Laing, Carlo R.

    Chimera states in heterogeneous networks Carlo R. Laing Institute of Information and Mathematical Chimera states in networks of coupled oscillators occur when some fraction of the oscillators synchronise with one another, while the remaining oscillators are incoherent. Several groups have studied chimerae

  13. The Composition and Validation of Heterogeneous Control Laws Benjamin Kuipersy

    E-Print Network [OSTI]

    Kuipers, Benjamin

    Introduction Much control theory is based on linear models. This works very well for steady state regulation cation." Again, design and validation of these control laws is based primarily on experienceThe Composition and Validation of Heterogeneous Control Laws Benjamin Kuipersy University of Texas

  14. Modeling and Analysis of Heterogeneous Regulation in Biological Networks.

    E-Print Network [OSTI]

    Shamir, Ron

    Modeling and Analysis of Heterogeneous Regulation in Biological Networks. Irit Gat-Viks Amos Tanay of an integrative approach to the modeling and learning of regulation. In this work we study steady state behavior (metabolites may regulate transcription, enzymes may regulate metabolic reactions). We show how such models can

  15. Autonomous Demand Response in Heterogeneous Smart Grid Topologies

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    , heterogeneous grid, locational marginal price, game theory, Nash equilibrium. I. INTRODUCTION Demand response on locational marginal prices (LMPs), which depend on parameters such as the line c appliances such as air-conditioners and water-heaters [2]. An alternative for DLC is smart pricing, where

  16. An Analysis of Heterogeneity in Futuristic Unmanned Vehicle Systems

    E-Print Network [OSTI]

    Cummings, Mary "Missy"

    and with enough automation aboard unmanned vehicles, inverting the multiple operators to single-vehicle control1 An Analysis of Heterogeneity in Futuristic Unmanned Vehicle Systems C.E. NEHME M.L. CUMMINGS paradigm is possible. These studies, however, have generally focused on homogeneous teams of vehicles

  17. Hybrid Heterogeneous Energy Supply Networks Farinaz Koushanfar and Azalia Mirhoseini

    E-Print Network [OSTI]

    Hybrid Heterogeneous Energy Supply Networks Farinaz Koushanfar and Azalia Mirhoseini Department--Efficient energy supply, storage, and distribution are key technical challenges for design and operation of electronic systems. In particular, energy supply is the most scarce resource and constraint for mobile

  18. Probabilistic Detection of Mobile Targets in Heterogeneous Sensor Networks

    E-Print Network [OSTI]

    Poovendran, Radha

    , a surveillance system can be realized via fusion of data aggregated from various sensor modalities: infrared, CCD of detection can be quantified by evaluating the probability of detection by at least k sensors, where kProbabilistic Detection of Mobile Targets in Heterogeneous Sensor Networks Loukas Lazos Network

  19. An analysis and hypothesis generation platform for heterogeneous cancer

    E-Print Network [OSTI]

    Reed, Chris

    An analysis and hypothesis generation platform for heterogeneous cancer databases. Philip Roy QUINLAN a,1, Alastair THOMPSON a and Chris REED b a Dundee Cancer Centre, University of Dundee, Ninewells Hospital, Dundee b School of Computing, University of Dundee, Dundee Abstract. The field of cancer research

  20. Lighting the Dark Silicon by Exploiting Heterogeneity on Future Processors

    E-Print Network [OSTI]

    Koppelman, David M.

    ][17], leading to an ever increasing power density on modern processors. On the other hand, the max- imumLighting the Dark Silicon by Exploiting Heterogeneity on Future Processors Ying Zhang Lu Peng Xin processor power consumption should be always enclosed within a reasonable envelope despite the manufacturing

  1. Embedding Heterogeneous Data using Statistical Models Amir Globerson1

    E-Print Network [OSTI]

    Chechik, Gal

    of similarity is Copyright c 2006, American Association for Artificial In- telligence (www.aaai.org). All rights- ing embeddings from statistical associations. The idea is to find a Euclidean embedding in lowEmbedding Heterogeneous Data using Statistical Models Amir Globerson1 Gal Chechik2 Fernando Pereira

  2. A Heterogeneous Animated Platform for Educational Participatory Simulations

    E-Print Network [OSTI]

    Tomlinson, Bill

    by populations of 3D animated virtual creatures. When a human participant brings one of the mobile devices (a as an educational tool. Keywords: Human-Computer Interaction, Handheld/Mobile Devices, Virtual/3D EnvironmentsA Heterogeneous Animated Platform for Educational Participatory Simulations Bill Tomlinson ACE

  3. Energy-Efficient Computing with Heterogeneous Multi-Cores

    E-Print Network [OSTI]

    Mitra, Tulika

    Energy-Efficient Computing with Heterogeneous Multi-Cores Tulika Mitra School of Computing National the application can be exploited leading to faster and energy-efficient computing. This paper describes of such architectures for improved energy-efficiency. I. INTRODUCTION The past decade has witnessed an unprecedented

  4. Reliability of Heterogeneous Distributed Computing Systems in the Presence

    E-Print Network [OSTI]

    Hayat, Majeed M.

    Reliability of Heterogeneous Distributed Computing Systems in the Presence of Correlated Failures of distributed-computing systems (DCSs) has been widely studied under the assumption that computing elements (CEs of correlated failures are also investigated. Index Terms--Distributed computing, load balancing, reliability

  5. Energy Conservation in Heterogeneous Server Clusters Taliver Heath

    E-Print Network [OSTI]

    Bianchini, Ricardo

    Energy Conservation in Heterogeneous Server Clusters Taliver Heath ¡ , Bruno Diniz ¢ , Enrique V of Quito Piscataway, NJ 08854-8019 Belo Horizonte, Brazil Quito, Ecuador¤ taliver,ricardob¥ @cs nodes show that our server can consume 42% less energy than an energy-oblivious server, with only

  6. Nucleotide Specificity versus Complex Heterogeneity in Exonuclease Activity Measurements

    E-Print Network [OSTI]

    Enderlein, Jörg

    Nucleotide Specificity versus Complex Heterogeneity in Exonuclease Activity Measurements Jo activity is nucleotide-dependent, and that a fluorescent label bound to a nucleotide significantly slows are fluorescently labeled at two specific sites in the nucleotide sequence (positions 5 and 38 from the free end

  7. Heterogeneity of Nucleotide Frequencies Among Evolutionary Lineages and Phylogenetic Inference

    E-Print Network [OSTI]

    Rosenberg, Michael S.

    Heterogeneity of Nucleotide Frequencies Among Evolutionary Lineages and Phylogenetic Inference is the homogeneity of nucleotide frequencies among taxa, which refers to the equality of the nucleotide frequency bias among species. Changes in nucleotide frequency among different lineages in a data set are thought

  8. Numerical assessment of 3-D macrodispersion in heterogeneous porous media

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . [1] Hydrodynamic dispersion is a key controlling factor of solute transport in heterogeneous porous.20206. 1. Introduction [2] Hydrodynamic dispersion is a major component of solute transport; Freeze, 1975; Gelhar and Axness, 1983]. The logarithm of permeability Y xð Þ ¼ ln K xð Þð Þ follows

  9. a Modular, Multi-Engine Simulator for Heterogeneous Swarm Robotics

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    ARGoS: a Modular, Multi-Engine Simulator for Heterogeneous Swarm Robotics Carlo Pinciroli, Vito, Gianni Di Caro, Frederick Ducatelle, Timothy Stirling§, ´Alvaro Guti´errez, Luca Maria Gambardella. A unique feature of ARGoS is the possibility to use multiple physics engines of different types

  10. Heterogeneous cavitation in liquid helium 4 near a glass plate

    E-Print Network [OSTI]

    Caupin, Frédéric

    Heterogeneous cavitation in liquid helium 4 near a glass plate X. Chavanne, S. Balibar and F wave to study cavitation, i.e. the nucleation of bubbles, in liquid helium 4 near a clean glass plate and threshold pressures in the range 0 to -3 bar, significantly less negative than for homogeneous cavitation

  11. Energy Consumption Characteriation of Heterogeneous Servers School of Computer Science

    E-Print Network [OSTI]

    Qin, Xiao

    Energy Consumption Characteriation of Heterogeneous Servers Xiao Zhang School of Computer Science Machine between servers to save energy. An accurate energy consumption model is the basic of energy management. Most past studies show that energy consumption has linear relation with resource utilization. We

  12. Energy-Aware Multiband Communications in Heterogeneous Networks

    E-Print Network [OSTI]

    Gesbert, David

    Engineering, University of Novi Sad, Serbia Abstract--This paper investigates the energy-efficiency of wellEnergy-Aware Multiband Communications in Heterogeneous Networks Wael Guib`ene, Chadi Khirallah- known spectrum sensing algorithms that exploit the sensed signal's energy, autocorrelation

  13. Heterogeneous Surface-Based Freezing of Atmospheric Aerosols Containing Ash, Soot, and Soil

    E-Print Network [OSTI]

    Fornea, Adam P.

    2010-07-14T23:59:59.000Z

    Nucleation of ice crystals in the atmosphere often occurs through heterogeneous freezing processes facilitated by an atmospheric aerosol that acts as the ice nuclei (IN). Depending on ambient conditions and aerosol composition, heterogeneous...

  14. Environmental Kuznets Curve for carbon dioxide emissions: lack of robustness to heterogeneity?

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Environmental Kuznets Curve for carbon dioxide emissions: lack of robustness to heterogeneity applying the iterative Bayesian shrinkage procedure. The environmental Kuznets curve (EKC) hypothesis. Keywords: Environmental Kuznets curve; Bayesian shrinkage estimator; Heterogeneity JEL classification: O13

  15. AN AUTOMATED SYSTEM FOR SYSTEMATIC TESTING OF LOCOMOTION ON HETEROGENEOUS GRANULAR MEDIA*

    E-Print Network [OSTI]

    Goldman, Daniel I.

    robotic locomotors like PackBot or RHex (Figure 1a) travel across these "flowable" types of terrain [1]). Figure 1 Natural heterogeneous terrain. (a) RHex robot traveling across heterogeneous gravel substrate

  16. Hybrid Dynamic Energy and Thermal Management in Heterogeneous Embedded Multiprocessor SoCs

    E-Print Network [OSTI]

    Simunic, Tajana

    Hybrid Dynamic Energy and Thermal Management in Heterogeneous Embedded Multiprocessor SoCs Shervin propose a joint thermal and energy management technique specifically designed for heterogeneous MPSo technique simultaneously reduces the thermal hot spots, temperature gradients, and energy consumption

  17. High Performance Code Generation for Stencil Computation on Heterogeneous Multi-device

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    .namyst@inria.fr Abstract--Heterogeneous architectures have been widely used in the domain of high performance computing, Multi- device, Code generation, Heterogeneous architectures I. INTRODUCTION High performance computing

  18. EVIDENCE FOR MAGNESIUM ISOTOPE HETEROGENEITY IN THE SOLAR PROTOPLANETARY DISK

    SciTech Connect (OSTI)

    Larsen, Kirsten K.; Trinquier, Anne; Paton, Chad; Schiller, Martin; Wielandt, Daniel; Connelly, James N.; Nordlund, Ake; Krot, Alexander N.; Bizzarro, Martin [Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, Copenhagen DK-1350 (Denmark); Ivanova, Marina A. [Vernadsky Institute of Geochemistry and Analytical Chemistry, Moscow 119991 (Russian Federation)

    2011-07-10T23:59:59.000Z

    With a half-life of 0.73 Myr, the {sup 26}Al-to-{sup 26}Mg decay system is the most widely used short-lived chronometer for understanding the formation and earliest evolution of the solar protoplanetary disk. However, the validity of {sup 26}Al-{sup 26}Mg ages of meteorites and their components relies on the critical assumption that the canonical {sup 26}Al/{sup 27}Al ratio of {approx}5 x 10{sup -5} recorded by the oldest dated solids, calcium-aluminium-rich inclusions (CAIs), represents the initial abundance of {sup 26}Al for the solar system as a whole. Here, we report high-precision Mg-isotope measurements of inner solar system solids, asteroids, and planets demonstrating the existence of widespread heterogeneity in the mass-independent {sup 26}Mg composition ({mu}{sup 26}Mg*) of bulk solar system reservoirs with solar or near-solar Al/Mg ratios. This variability may represent heterogeneity in the initial abundance of {sup 26}Al across the solar protoplanetary disk at the time of CAI formation and/or Mg-isotope heterogeneity. By comparing the U-Pb and {sup 26}Al-{sup 26}Mg ages of pristine solar system materials, we infer that the bulk of the {mu}{sup 26}Mg* variability reflects heterogeneity in the initial abundance of {sup 26}Al across the solar protoplanetary disk. We conclude that the canonical value of {approx}5 x 10{sup -5} represents the average initial abundance of {sup 26}Al only in the CAI-forming region, and that large-scale heterogeneity-perhaps up to 80% of the canonical value-may have existed throughout the inner solar system. If correct, our interpretation of the Mg-isotope composition of inner solar system objects precludes the use of the {sup 26}Al-{sup 26}Mg system as an accurate early solar system chronometer.

  19. Characterization of oil and gas reservoir heterogeneity. Final report

    SciTech Connect (OSTI)

    Tyler, N.; Barton, M.D.; Bebout, D.G.; Fisher, R.S.; Grigsby, J.D.; Guevara, E.; Holtz, M.; Kerans, C.; Nance, H.S.; Levey, R.A.

    1992-10-01T23:59:59.000Z

    Research described In this report addresses the internal architecture of two specific reservoir types: restricted-platform carbonates and fluvial-deltaic sandstones. Together, these two reservoir types contain more than two-thirds of the unrecovered mobile oil remaining ill Texas. The approach followed in this study was to develop a strong understanding of the styles of heterogeneity of these reservoir types based on a detailed outcrop description and a translation of these findings into optimized recovery strategies in select subsurface analogs. Research targeted Grayburg Formation restricted-platform carbonate outcrops along the Algerita Escarpment and In Stone Canyon In southeastern New Mexico and Ferron deltaic sandstones in central Utah as analogs for the North Foster (Grayburg) and Lake Creek (Wilcox) units, respectively. In both settings, sequence-stratigraphic style profoundly influenced between-well architectural fabric and permeability structure. It is concluded that reservoirs of different depositional origins can therefore be categorized Into a ``heterogeneity matrix`` based on varying intensity of vertical and lateral heterogeneity. The utility of the matrix is that it allows prediction of the nature and location of remaining mobile oil. Highly stratified reservoirs such as the Grayburg, for example, will contain a large proportion of vertically bypassed oil; thus, an appropriate recovery strategy will be waterflood optimization and profile modification. Laterally heterogeneous reservoirs such as deltaic distributary systems would benefit from targeted infill drilling (possibly with horizontal wells) and improved areal sweep efficiency. Potential for advanced recovery of remaining mobile oil through heterogeneity-based advanced secondary recovery strategies In Texas is projected to be an Incremental 16 Bbbl. In the Lower 48 States this target may be as much as 45 Bbbl at low to moderate oil prices over the near- to mid-term.

  20. ISHHC XIII International Symposium on the Relations between Homogeneous and Heterogeneous Catalysis

    E-Print Network [OSTI]

    Somorjai Ed., G.A.

    2007-01-01T23:59:59.000Z

    K. Lee Semiconductor Photocatalysis in Advanced Oxidationthermal) catalysis or photocatalysis on nanoporous supportswith Heterogeneous Photocatalysis using Nanostructured

  1. ISHHC XIII International Symposium on the Relations betweenHomogeneous and Heterogeneous Catalysis

    SciTech Connect (OSTI)

    Somorjai (Ed.), G.A.

    2007-06-11T23:59:59.000Z

    The International Symposium on Relations between Homogeneous and Heterogeneous Catalysis (ISHHC) has a long and distinguished history. Since 1974, in Brussels, this event has been held in Lyon, France (1977), Groeningen, The Netherlands (1981); Asilomar, California (1983); Novosibirsk, Russia (1986); Pisa, Italy (1989); Tokyo, Japan (1992); Balatonfuered, Hungary (1995); Southampton, United Kingdom (1999); Lyon, France (2001); Evanston, Illinois (2001) and Florence, Italy (2005). The aim of this international conference in Berkeley is to bring together practitioners in the three fields of catalysis, heterogeneous, homogeneous and enzyme, which utilize mostly nanosize particles. Recent advances in instrumentation, synthesis and reaction studies permit the nanoscale characterization of the catalyst systems, often for the same reaction, under similar experimental conditions. It is hoped that this circumstance will permit the development of correlations of these three different fields of catalysis on the molecular level. To further this goal we aim to uncover and focus on common concepts that emerge from nanoscale studies of structures and dynamics of the three types of catalysts. Another area of focus that will be addressed is the impact on and correlation of nanosciences with catalysis. There is information on the electronic and atomic structures of nanoparticles and their dynamics that should have importance in catalyst design and catalytic activity and selectivity.

  2. 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...

  3. 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

  4. Effective friction law for smallscale fault heterogeneity in 3D dynamic rupture

    E-Print Network [OSTI]

    Nicolas, Chamot-Rooke

    Effective friction law for smallscale fault heterogeneity in 3D dynamic rupture S. Latour,1 M friction, we numerically construct effective friction laws that integrate the effects of smallscale, the static friction heterogeneities and the friction law. We first define a periodic smallscale heterogeneous

  5. Joint Network/Channel Decoding for Heterogeneous MultiSource/MultiRelay Cooperative Networks

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Joint Network/Channel Decoding for Heterogeneous Multi­Source/Multi­Relay Cooperative Networks for multi­source multi­relay heterogeneous wireless networks. When convolutional and network codes are used Error Protection (UEP) properties, which might be useful for heterogeneous wireless networks in which

  6. Tissue heterogeneity in the mouse lung: effects of elastase treatment Satoru Ito,1

    E-Print Network [OSTI]

    Lutchen, Kenneth

    Tissue heterogeneity in the mouse lung: effects of elastase treatment Satoru Ito,1 Edward P heterogeneity in the mouse lung: effects of elastase treatment. J Appl Physiol 97: 204­212, 2004. First to characterize heterogeneity of tissue elasticity of the lung. The model includes a parallel set of pathways

  7. Assembling thefacebook: Using heterogeneity to understand online social network assembly

    E-Print Network [OSTI]

    Jacobs, Abigail Z; Ugander, Johan; Clauset, Aaron

    2015-01-01T23:59:59.000Z

    Online social networks represent a popular and highly diverse class of social media systems. Despite this variety, each of these systems undergoes a general process of online social network assembly, which represents the complicated and heterogeneous changes that transform newly born systems into mature platforms. However, little is known about this process. For example, how much of a network's assembly is driven by simple growth? How does a network's structure change as it matures? How does network structure vary with adoption rates and user heterogeneity, and do these properties play different roles at different points in the assembly? We investigate these and other questions using a unique dataset of online connections among the roughly one million users at the first 100 colleges admitted to Facebook, captured just 20 months after its launch. We first show that different vintages and adoption rates across this population of networks reveal temporal dynamics of the assembly process, and that assembly is onl...

  8. Test applications for heterogeneous real-time network testbed

    SciTech Connect (OSTI)

    Mines, R.F.; Knightly, E.W.

    1994-07-01T23:59:59.000Z

    This paper investigates several applications for a heterogeneous real-time network testbed. The network is heterogeneous in terms of network devices, technologies, protocols, and algorithms. The network is real-time in that its services can provide per-connection end-to-end performance guarantees. Although different parts of the network use different algorithms, all components have the necessary mechanisms to provide performance guarantees: admission control and priority scheduling. Three applications for this network are described in this paper: a video conferencing tool, a tool for combustion modeling using distributed computing, and an MPEG video archival system. Each has minimum performance requirements that must be provided by the network. By analyzing these applications, we provide insights to the traffic characteristics and performance requirements of practical real-time loads.

  9. Temperature-dependent structural heterogeneity in calcium silicate liquids.

    SciTech Connect (OSTI)

    Benmore, C. J.; Weber, J. K. R.; Wilding, M. C.; Du, J.; Parise, J. B. (X-Ray Science Division); (Materials Development Inc.); (Aberystwyth Univ.); (State Univ. of New York at Stony Brook); (Univ. of North Texas)

    2010-12-07T23:59:59.000Z

    X-ray diffraction measurements performed on aerodynamically levitated CaSiO{sub 3} droplets have been interpreted using a structurally heterogeneous liquid-state model. When cooled, the high-temperature liquid shows evidence of the polymerization of edge shared Ca octahedra. Diffraction isosbestic points are used to characterize the polymerization process in the pair-distribution function. This behavior is linear in the high-temperature melt but exhibits rapid growth just above the glass transition temperature around 1.2T{sub g}. The heterogeneous liquid interpretation is supported by molecular-dynamics simulations which show the CaSiO{sub 3} glass has more edge-shared polyhedra and fewer corner shared polyhedra than the liquid model.

  10. Nanoscale heterogeneity at the aqueous electrolyte-electrode interface

    E-Print Network [OSTI]

    David T. Limmer; Adam P. Willard

    2014-10-06T23:59:59.000Z

    Using molecular dynamics simulations, we reveal emergent properties of hydrated electrode interfaces that while molecular in origin are integral to the behavior of the system across long times scales and large length scales. Specifically, we describe the impact of a disordered and slowly evolving adsorbed layer of water on the molecular structure and dynamics of the electrolyte solution adjacent to it. Generically, we find that densities and mobilities of both water and dissolved ions are spatially heterogeneous in the plane parallel to the electrode over nanosecond timescales. These and other recent results are analyzed in the context of available experimental literature from surface science and electrochemistry. We speculate on the implications of this emerging microscopic picture on the catalytic proficiency of hydrated electrodes, offering an new direction for study in heterogeneous catalysis at the nanoscale.

  11. A microrheological study of hydrogel kinetics and micro-heterogeneity

    E-Print Network [OSTI]

    Aufderhorst-Roberts, Anders; Frith, William J.; Donald, Athene M.

    2014-05-27T23:59:59.000Z

    such as peptides capped with pyrene [10] and naphthalene [11]. By far the most studied group of aromatic peptide conjugates are pep- tides capped with the fluorenylmethyloxycarbonyl moiety a Present address: School of Physics and Astronomy, E. C. Stoner building... applications include the kinetics of formation [18] and the spatial heterogeneity of the hydrogel network [19]. Un- derstanding the former is essential when designing so- called smart systems that gel under pre-specified condi- tions [20], whereas the latter...

  12. Heterogeneous Beliefs, Collateralization, and Transactions in General Equilibrium

    E-Print Network [OSTI]

    Hu, Xu

    2012-10-19T23:59:59.000Z

    of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Co-Chairs of Committee, Leonardo Auernheimer Rajiv Sarin Committee Members, Thomas R. Saving David A. Bessler Amy J. Glass Head of Department, Timothy Gronberg August 2011 Major Subject...: Economics iii ABSTRACT Heterogeneous Beliefs, Collateralization, and Transactions in General Equilibrium. (August 2011) Xu Hu, B.B.A., The University of Science and Technology of China Co{Chairs of Advisory Committee: Dr. Leonardo Auernheimer Dr. Rajiv...

  13. Evidence for heterogeneity in facioscapulohumeral muscular dystrophy (FSHD)

    SciTech Connect (OSTI)

    Gilbert, J.R.; Stajich, J.M.; Wall, S.; Carter, S.C.; Qiu, H.; Vance, J.M.; Stewart, C.S.; Speer, M.C.; Pufky, J.; Yamaoka, L.H.; Rozear, M.; Roses, A.D.; Pericak-Vance, M.A. (Duke Univ. Medical Center, Durham, NC (United States)); Samson, F.; Fardeau, M. (INSERM, Paris (France))

    1993-08-01T23:59:59.000Z

    Facioscapulohumeral muscular dystrophy (FSHD) is a slowly progressive primary disease of muscle which is usually inherited as an autosomal dominant disorder. FSHD has been localized to the long arm of chromosome 4, specifically to the 4q3.5-qter region. Initially published linkage studies showed no evidence for heterogeneity in FSHD. In the present study the authors have examined individuals in seven FSHD families. Two-point lod scores show significant evidence for linkage for D4S163 (lod score 3.04 at recombination fraction .21) and D4S139 (lod score 3.84 at recombination fraction .20). D4S171 also gave a positive score (lod score 2.56 at recombination fraction .24). Significant evidence for heterogeneity was found for each of the three markers. Multipoint linkage analysis in this region resulted in a peak multipoint lod score of 6.47. The multipoint analysis supported the two-point studies with odds of 20:1 showing linkage and heterogeneity over linkage and homogeneity. Five of the seven families gave a posterior probability of >95% of being of the linked type, while two families appeared unlinked to this region of 4q (P<.01%). Individuals in the two unlinked families met the clinical criteria for the diagnosis of FSHD, including facial weakness, clavicular flattening, scapula winging, proximal muscle weakness, and myopathic changes on muscle biopsies without inflammatory or mitochondrial pathology. This study demonstrates genetic heterogeneity in FSHD and has important implications for both genetic counseling and the elucidation of the etiology of FSHD. 19 refs., 3 figs., 2 tabs.

  14. Architecture-Aware Algorithms for Scalable Performance and Resilience on Heterogeneous Architectures

    SciTech Connect (OSTI)

    Dongarra, Jack [University of Tennessee, Knoxville] [University of Tennessee, Knoxville

    2013-10-15T23:59:59.000Z

    The goal of the Extreme-scale Algorithms & Software Institute (EASI) is to close the ?application-architecture performance gap? by exploring algorithms and runtime improvements that will enable key science applications to better exploit the architectural features of DOE extreme-scale systems. For the past year of the project, our efforts at the University of Tennessee have concentrated on, and made significant progress related to, the following high-level EASI goals: ? Develop multi-precision and architecture-aware implementations of Krylov, Poisson, Helmholtz solvers, and dense factorizations for heterogeneous multi-core systems; ? Explore new methods of algorithm resilience, and develop new algorithms with these capabilities; ? Develop runtime support for adaptable algorithms that are dealing with resilience, scalability; ? Distribute the new algorithms and runtime support through widely used software packages; ? Establish a strong outreach program to disseminate results, interact with colleagues and train students and junior members of our community.

  15. Picosecond Dynamic Heterogeneity, Hopping and Johari-Goldstein Relaxation in Glassforming Liquids

    E-Print Network [OSTI]

    Marcus T. Cicerone; Qin Zhong; Madhusudan Tyagi

    2014-06-30T23:59:59.000Z

    We show that incoherent quasi-elastic neutron scattering (QENS) from molecular liquids reveals a two-state dynamic heterogeneity on a 1 ps timescale, where molecules are either highly confined or are free to undergo relatively large excursions. Data ranging from deep in the glassy state to well above the melting point allows us to observe temperature-dependent population levels and exchange between these two states. A simple physical picture emerges from this data, combined with published work, that provides a mechanism for "hopping" and for the Johari-Goldstein ($\\beta_{JG}$) relaxation, and allows us to accurately calculate the diffusion coefficient, $D_T$, and characteristic times for $\\alpha$, and $\\beta_{JG}$ relaxations from ps timescale neutron data.

  16. Heterogeneous composite bodies with isolated lenticular shaped cermet regions

    DOE Patents [OSTI]

    Sherman, Andrew J. (Cirtland Hills, OH)

    2009-12-22T23:59:59.000Z

    A heterogeneous body having ceramic rich cermet regions in a more ductile metal matrix. The heterogeneous bodies are formed by thermal spray operations on metal substrates. The thermal spray operations apply heat to a cermet powder and project it onto a solid substrate. The cermet powder is composed of complex composite particles in which a complex ceramic-metallic core particle is coated with a matrix precursor. The cermet regions are generally comprised of complex ceramic-metallic composites that correspond approximately to the core particles. The cermet regions are approximately lenticular shaped with an average width that is at least approximately twice the average thickness. The cermet regions are imbedded within the matrix phase and generally isolated from one another. They have obverse and reverse surfaces. The matrix phase is formed from the matrix precursor coating on the core particles. The amount of heat applied during the formation of the heterogeneous body is controlled so that the core particles soften but do not become so fluid that they disperse throughout the matrix phase. The force of the impact on the surface of the substrate tends to flatten them. The flattened cermet regions tend to be approximately aligned with one another in the body.

  17. 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.

  18. Inter-layer Vias and TESH Interconnection Network for 3-D Heterogeneous Sensor System on a Chip

    E-Print Network [OSTI]

    Chapman, Glenn H.

    3D Heterogeneous system on a chip Unattended Ground Sensor Technologies and Applications VII, edited

  19. Addressing resource over-exploitation via cooperative institutions: Insights from sector level technology roadmapping

    E-Print Network [OSTI]

    More, Elliott; Phaal, Dr. Robert; Probert, David

    2015-01-01T23:59:59.000Z

    investment in rail networks [27]. There is some existing research on the benefit of using roadmapping to achieve industry-level collaboration. In the UK automotive industry, Phaal et al. [21] documented communication and network development benefits arising... are dependent on sustainable resource management to ensure their long term survival. This paper examines the potential for roadmapping to foster collaboration between firms in an industry to create cooperative institutions such as those examined by Ostrom...

  20. Final Technical Report - Investigation into the Relationship between Heterogeneity and Heavy-Tailed Solute Transport

    SciTech Connect (OSTI)

    Weissmann, Gary S

    2013-12-06T23:59:59.000Z

    The objective of this project was to characterize the influence that naturally complex geologic media has on anomalous dispersion and to determine if the nature of dispersion can be estimated from the underlying heterogeneous media. The UNM portion of this project was to provide detailed representations of aquifer heterogeneity through producing highly-resolved models of outcrop analogs to aquifer materials. This project combined outcrop-scale heterogeneity characterization (conducted at the University of New Mexico), laboratory experiments (conducted at Sandia National Laboratory), and numerical simulations (conducted at Sandia National Laboratory and Colorado School of Mines). The study was designed to test whether established dispersion theory accurately predicts the behavior of solute transport through heterogeneous media and to investigate the relationship between heterogeneity and the parameters that populate these models. The dispersion theory tested by this work was based upon the fractional advection-dispersion equation (fADE) model. Unlike most dispersion studies that develop a solute transport model by fitting the solute transport breakthrough curve, this project explored the nature of the heterogeneous media to better understand the connection between the model parameters and the aquifer heterogeneity. We also evaluated methods for simulating the heterogeneity to see whether these approaches (e.g., geostatistical) could reasonably replicate realistic heterogeneity. The UNM portion of this study focused on capturing realistic geologic heterogeneity of aquifer analogs using advanced outcrop mapping methods.

  1. 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...

  2. Dense Heterogeneous Continuum Model of Two-Phase Explosion Fields

    SciTech Connect (OSTI)

    Kuhl, A L; Bell, J B

    2010-04-07T23:59:59.000Z

    A heterogeneous continuum model is proposed to describe the dispersion of a dense Aluminum particle cloud in an explosion. Let {alpha}{sub 1} denote the volume fraction occupied by the gas and {alpha}{sub 2} the fraction occupied by the solid, satisfying the volume conservation relation: {alpha}{sub 1} + {alpha}{sub 2} = 1. When the particle phase occupies a non-negligible volume fraction (i.e., {alpha}{sub 2} > 0), additional terms, proportional to {alpha}{sub 2}, appear in the conservation laws for two-phase flows. These include: (i) a particle pressure (due to particle collisions), (ii) a corresponding sound speed (which produces real eigenvalues for the particle phase system), (iii) an Archimedes force induced on the particle phase (by the gas pressure gradient), and (iv) multi-particle drag effects (which enhance the momentum coupling between phases). These effects modify the accelerations and energy distributions in the phases; we call this the Dense Heterogeneous Continuum Model. A characteristics analysis of the Model equations indicates that the system is hyperbolic with real eigenvalues for the gas phase: {l_brace}v{sub 1}, v{sub 1} {+-} {alpha}{sub 1}{r_brace} and for the 'particle gas' phase: {l_brace}v{sub 2}, v{sub 2} {+-}{alpha}{sub 2}{r_brace} and the particles: {l_brace}v{sub 2}{r_brace}, where v{sub i} and {alpha}{sub i} denote the velocity vector and sound speed of phase i. These can be used to construct a high-order Godunov scheme to integrate the conservation laws of a dense heterogeneous continuum.

  3. MRI of Heterogeneous Hydrogenation Reactions Using Parahydrogen Polarization

    SciTech Connect (OSTI)

    Burt, Scott R; Burt, Scott R.

    2008-06-25T23:59:59.000Z

    The power of magnetic resonance imaging (MRI) is its ability to image the internal structure of optically opaque samples and provide detailed maps of a variety of important parameters, such as density, diffusion, velocity and temperature. However, one of the fundamental limitations of this technique is its inherent low sensitivity. For example, the low signal to noise ratio (SNR) is particularly problematic for imaging gases in porous materials due to the low density of the gas and the large volume occluded by the porous material. This is unfortunate, as many industrially relevant chemical reactions take place at gas-surface interfaces in porous media, such as packed catalyst beds. Because of this severe SNR problem, many techniques have been developed to directly increase the signal strength. These techniques work by manipulating the nuclear spin populations to produce polarized} (i.e., non-equilibrium) states with resulting signal strengths that are orders of magnitude larger than those available at thermal equilibrium. This dissertation is concerned with an extension of a polarization technique based on the properties of parahydrogen. Specifically, I report on the novel use of heterogeneous catalysis to produce parahydrogen induced polarization and applications of this new technique to gas phase MRI and the characterization of micro-reactors. First, I provide an overview of nuclear magnetic resonance (NMR) and how parahydrogen is used to improve the SNR of the NMR signal. I then present experimental results demonstrating that it is possible to use heterogeneous catalysis to produce parahydrogen-induced polarization. These results are extended to imaging void spaces using a parahydrogen polarized gas. In the second half of this dissertation, I demonstrate the use of parahydrogen-polarized gas-phase MRI for characterizing catalytic microreactors. Specifically, I show how the improved SNR allows one to map parameters important for characterizing the heat and mass transport in a heterogeneous catalyst bed. This is followed by appendices containing detailed information regarding the design and use of my experimental setup.

  4. What can I do with this degree? Corporate office summer clerkships and entry level

    E-Print Network [OSTI]

    Escher, Christine

    be valuable to private firms later. Governmentworkoffersavarietyofpractice opportunities from criminal Political Action Committees Law firms Public Interest Advocacy Groups Develop the ability to maintain energy Congressional representatives at national, state and local government PRIVATE PRACTICE Large multi-office firms

  5. 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...

  6. 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

  7. 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

  8. Dynamical heterogeneities in an attraction driven colloidal glass

    E-Print Network [OSTI]

    Antonio M. Puertas; Matthias Fuchs; Michael E. Cates

    2006-01-16T23:59:59.000Z

    The dynamical heterogeneities (DH) in non-ergodic states of an attractive colloidal glass are studied, as a function of the waiting time. Whereas the fluid states close to vitrify showed strong DH, the distribution of squared displacements of the glassy states studied here only present a tail of particles with increased mobility for the lower attraction strength at short waiting times. These particles are in the surface of the percolating cluster that comprises all of the particles, reminiscent of the fastest particles in the fluid. The quench deeper into the attractive glass is dynamically more homogeneous, in agreement with repulsive glasses (i.e. Lennard-Jones glass).

  9. Microgrids and Heterogeneous Security, Quality, Reliability, andAvailability

    SciTech Connect (OSTI)

    Marnay, Chris

    2007-01-31T23:59:59.000Z

    This paper describes two stylized alternative visions inpopular currencyof how the power system might evolve to meet futurerequirements for the high quality electricity service that modern digitaleconomies demand, a supergrids paradigm and a dispersed paradigm. Some ofthe economics of the dispersed vision are explored. Economic perspectivesare presented on both the choice of homogeneous universal power qualityupstream in the electricity supply, and also on the extremelyheterogeneous require-ments of end-use loads. Finally, the potential roleof microgrids in delivering heterogeneous power quality is demonstratedby reference to two ongoing microgrid tests in the U.S. andJapan.

  10. A heterogeneous hierarchical architecture for real-time computing

    SciTech Connect (OSTI)

    Skroch, D.A.; Fornaro, R.J.

    1988-12-01T23:59:59.000Z

    The need for high-speed data acquisition and control algorithms has prompted continued research in the area of multiprocessor systems and related programming techniques. The result presented here is a unique hardware and software architecture for high-speed real-time computer systems. The implementation of a prototype of this architecture has required the integration of architecture, operating systems and programming languages into a cohesive unit. This report describes a Heterogeneous Hierarchial Architecture for Real-Time (H{sup 2} ART) and system software for program loading and interprocessor communication.

  11. Ice Nucleation on Carbon Surface Supports the Classical Theory for Heterogeneous Nucleation

    E-Print Network [OSTI]

    Cabriolu, Raffaela

    2015-01-01T23:59:59.000Z

    The prevalence of heterogeneous nucleation in nature was explained qualitatively by the classical theory for heterogeneous nucleation established over more than 60 years ago, but the quantitative validity and the key conclusions of the theory have remained unconfirmed. Employing the forward flux sampling method and the coarse-grained water model mW, we explicitly computed the heterogeneous ice nucleation rates in the supercooled water on a graphitic surface at various temperatures. The independently calculated ice nucleation rates were found to fit well according to the classical theory for heterogeneous nucleation. The fitting procedure further yields the estimate of the potency factor which measures the ratio of the heterogeneous nucleation barrier to the homogeneous nucleation barrier. Remarkably, the estimated potency factor agrees quantitatively with the volumetric ratio of the critical nuclei between the heterogeneous and homogeneous nucleation. Our numerical study thus provides a strong support to the ...

  12. acetylation p1-4intratumoral heterogeneity: Topics by E-print...

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  13. adaptive heterogeneous multi-robot: Topics by E-print Network

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

    Sciences Websites Summary: Sequential Consistency for Heterogeneous-Race-Free DEREK R. HOWER, BRADFORD M. BECKMANN, BENEDICT R: Sequential Consistency for Data-Race-Free (SC for...

  14. Kinetics of Heterogeneous Reaction of CaCO3 Particles with Gaseous...

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

    of Humidity. Abstract: Heterogeneous reaction kinetics of gaseous nitric acid (HNO3) with calcium carbonate (CaCO3) particles was investigated using the Particle-on-Substrate...

  15. Integrative Protein Function Transfer using Factor Graphs and Heterogeneous Data Sources

    E-Print Network [OSTI]

    Mishra, Bud

    Integrative Protein Function Transfer using Factor Graphs and Heterogeneous Data Sources Antonina, translation initiation, enzymatic catalysis, and immune re- sponse. However, for a large portion of proteins

  16. SemiStructured Data Extraction from Heterogeneous Sources Xiaoying Gao and Leon Sterling

    E-Print Network [OSTI]

    Gao, Xiaoying "Sharon"

    Semi­Structured Data Extraction from Heterogeneous Sources Xiaoying Gao and Leon Sterling Intelligent Agent Laboratory Department of Computer Science and Software Engineering The University

  17. Unified Model for Contact Angle Hysteresis on Heterogeneous and Superhydrophobic Surfaces

    E-Print Network [OSTI]

    Raj, Rishi

    Understanding the complexities associated with contact line dynamics on chemically heterogeneous and superhydrophobic surfaces is important for a wide variety of engineering problems. Despite significant efforts to capture ...

  18. Heterogeneous Reduction of U6+ by Structural Fe2+ From Theory...

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

    U6+ by Structural Fe2+ From Theory and Experiment. Heterogeneous Reduction of U6+ by Structural Fe2+ From Theory and Experiment. Abstract: Computational and experimental studies...

  19. Monodisperse Platinum and Rhodium Nanoparticles as Model Heterogeneous Catalysts

    SciTech Connect (OSTI)

    Coble, Inger M

    2008-08-15T23:59:59.000Z

    Model heterogeneous catalysts have been synthesized and studied to better understand how the surface structure of noble metal nanoparticles affects catalytic performance. In this project, monodisperse rhodium and platinum nanoparticles of controlled size and shape have been synthesized by solution phase polyol reduction, stabilized by polyvinylpyrrolidone (PVP). Model catalysts have been developed using these nanoparticles by two methods: synthesis of mesoporous silica (SBA-15) in the presence of nanoparticles (nanoparticle encapsulation, NE) to form a composite of metal nanoparticles supported on SBA-15 and by deposition of the particles onto a silicon wafer using Langmuir-Blodgett (LB) monolayer deposition. The particle shapes were analyzed by transmission electron microscopy (TEM) and high resolution TEM (HRTEM) and the sizes were determined by TEM, X-ray diffraction (XRD), and in the case of NE samples, room temperature H2 and CO adsorption isotherms. Catalytic studies were carried out in homebuilt gas-phase reactors. For the nanoparticles supported on SBA-15, the catalysts are in powder form and were studied using the homebuilt systems as plug-flow reactors. In the case of nanoparticles deposited on silicon wafers, the same systems were operated as batch reactors. This dissertation has focused on the synthesis, characterization, and reaction studies of model noble metal heterogeneous catalysts. Careful control of particle size and shape has been accomplished though solution phase synthesis of Pt and Rh nanoparticles in order to elucidate further structure-reactivity relationships in noble metal catalysis.

  20. Modelling long-distance seed dispersal in heterogeneous landscapes.

    SciTech Connect (OSTI)

    Levey, Douglas, J.; Tewlsbury, Joshua, J.; Bolker, Benjamin, M.

    2008-01-01T23:59:59.000Z

    1. Long-distance seed dispersal is difficult to measure, yet key to understanding plant population dynamics and community composition. 2. We used a spatially explicit model to predict the distribution of seeds dispersed long distances by birds into habitat patches of different shapes. All patches were the same type of habitat and size, but varied in shape. They occurred in eight experimental landscapes, each with five patches of four different shapes, 150 m apart in a matrix of mature forest. The model was parameterized with smallscale movement data collected from field observations of birds. In a previous study we validated the model by testing its predictions against observed patterns of seed dispersal in real landscapes with the same types and spatial configuration of patches as in the model. 3. Here we apply the model more broadly, examining how patch shape influences the probability of seed deposition by birds into patches, how dispersal kernels (distributions of dispersal distances) vary with patch shape and starting location, and how movement of seeds between patches is affected by patch shape. 4. The model predicts that patches with corridors or other narrow extensions receive higher numbers of seeds than patches without corridors or extensions. This pattern is explained by edgefollowing behaviour of birds. Dispersal distances are generally shorter in heterogeneous landscapes (containing patchy habitat) than in homogeneous landscapes, suggesting that patches divert the movement of seed dispersers, ‘holding’ them long enough to increase the probability of seed defecation in the patches. Dispersal kernels for seeds in homogeneous landscapes were smooth, whereas those in heterogenous landscapes were irregular. In both cases, long-distance (> 150 m) dispersal was surprisingly common, usually comprising approximately 50% of all dispersal events. 5. Synthesis . Landscape heterogeneity has a large influence on patterns of long-distance seed dispersal. Our results suggest that long-distance dispersal events can be predicted using spatially explicit modelling to scale-up local movements, placing them in a landscape context. Similar techniques are commonly used by landscape ecologists to model other types of movement; they offer much promise to the study of seed dispersal.

  1. Cooperation of Heterogeneous, Autonomous Robots: A Case Study of Humanoid and Wheeled Robots

    E-Print Network [OSTI]

    Stryk, Oskar von

    . I. INTRO With the growing importance of autonomous mobile robots in industrial and researchCooperation of Heterogeneous, Autonomous Robots: A Case Study of Humanoid and Wheeled Robots Jutta- ation of a strongly heterogeneous robot team, composed of a highly articulated humanoid robot

  2. Methodologies for PVC Configuration in Heterogeneous ATM Environments Using Intelligent Mobile Agents

    E-Print Network [OSTI]

    White, Tony

    Methodologies for PVC Configuration in Heterogeneous ATM Environments Using Intelligent Mobile; Methodologies for PVC Configuration in Heterogeneous ATM Environments Using Intelligent Mobile Agents John Boyer by individual ATM switch vendors has created an environment where there is no uniform method for PVC

  3. DIGITAL CHROMATOGRAPHY AND THE FORMA-TION OF HETEROGENEOUS DROPLET LIBRARIES

    E-Print Network [OSTI]

    Basu, Amar S.

    DIGITAL CHROMATOGRAPHY AND THE FORMA- TION OF HETEROGENEOUS DROPLET LIBRARIES USING University, Detroit MI, USA ABSTRACT Generating chemical libraries in droplet form is vital to the adoption in droplets (µFD), a method for generating heterogeneous droplet libraries using standard separation processes

  4. Dividing wall columns for heterogeneous azeotropic distillation Quang-Khoa Le1

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Dividing wall columns for heterogeneous azeotropic distillation Quang-Khoa Le1 , Ivar J. Halvorsen2 of this work is to implement heterogeneous azeotropic distillation schemes in a dividing wall column (DWC distillation, Petlyuk arrangement, energy saving. 1. Introduction Distillation is one of the most energy

  5. Modeling and rendering heterogeneous fog in real-time using B-Spline wavelets

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Modeling and rendering heterogeneous fog in real-time using B-Spline wavelets Anthony Giroud method to render heterogeneous fog in real-time. The extinction function of our fog, related to its to obtain a decomposition in both space and frequency domains. A grid traversal is used to render the fog

  6. Towards Feasible and Effective Load Sharing in a Heterogeneous Computational Grid

    E-Print Network [OSTI]

    Chung, Yeh-Ching

    speed. Heterogeneity puts a challenge on designing effective load sharing methods. Methods developedTowards Feasible and Effective Load Sharing in a Heterogeneous Computational Grid Kuo-Chan Huang local user communities. Feasible and effective load sharing is key to fulfilling such a concern

  7. DELAR: Device/Energy/Load Aware Relaying in Heterogenous Wireless Ad Hoc Networks

    E-Print Network [OSTI]

    Zhang, Yanchao

    - newable energy sources. In DELAR the heterogeneity of nodal energy capabilities or device types, nodalDELAR: Device/Energy/Load Aware Relaying in Heterogenous Wireless Ad Hoc Networks Wei Liu Energy conservation is of great importance for mobile ad hoc networks in which most nodes are equipped

  8. Visualization of Heterogeneous GeoSpatial Intelligence in a Mobile Environment

    E-Print Network [OSTI]

    Lodha, Suresh K.

    Visualization of Heterogeneous GeoSpatial Intelligence in a Mobile Environment Srikumar Ramalingam for visualization of heterogeneous geospatial information in a synchronous manner. Geospatial reg- istration between to enable location awareness for the mobile agents. Querying of geospatial databases is supported to obtain

  9. The Composition and Validation of Heterogeneous Control Laws \\Lambda Benjamin Kuipers y

    E-Print Network [OSTI]

    Kuipers, Benjamin

    on linear models. This works very well for steady state regulation at a fixed operating point. To makeThe Composition and Validation of Heterogeneous Control Laws \\Lambda Benjamin Kuipers y University a method for creating and validating a nonlinear controller by the composition of heterogeneous local

  10. Heterogeneous ultrathin films fabricated by alternate assembly of exfoliated layered double hydroxides and polyanionw

    E-Print Network [OSTI]

    Wang, Zhong L.

    Heterogeneous ultrathin films fabricated by alternate assembly of exfoliated layered double September 2008 DOI: 10.1039/b807479h Transparent heterogeneous ultrathin films of exfoliated layered double substrate supported or free-standing. Recently, using exfoliated LDHs nanosheets as building blocks, Sasaki

  11. Modeling and Control of Heterogeneous Non-Holonomic Input-Constrained Multiagent Systems

    E-Print Network [OSTI]

    Loizou, Savvas G.

    of multiple-aircraft systems modeled as hybrid systems. With the advent of powerful formal verification toolsModeling and Control of Heterogeneous Non-Holonomic Input-Constrained Multiagent Systems Apollon S of the paper, we develop a modeling framework for heterogeneous multi-agent systems that is based on timed

  12. Efficient Power Management of Heterogeneous Soft Real-Time Clusters Leping Wang, Ying Lu

    E-Print Network [OSTI]

    Lu, Ying

    Efficient Power Management of Heterogeneous Soft Real-Time Clusters Leping Wang, Ying Lu Department}@cse.unl.edu Abstract With growing cost of electricity, the power management of server clusters has become an important for power management of heterogeneous soft real-time clusters. It is built on simple but effective

  13. An Efficient Threshold-Based Power Management Mechanism for Heterogeneous Soft Real-Time Clusters

    E-Print Network [OSTI]

    Lu, Ying

    An Efficient Threshold-Based Power Management Mechanism for Heterogeneous Soft Real-Time Clusters {lwang, ylu}@cse.unl.edu Abstract With growing cost of electricity, the power management of server proposes an efficient algorithm for power management of heterogeneous soft real-time clusters. It is built

  14. A Framework for Distributed Key Management Schemes in Heterogeneous Wireless Sensor Networks

    E-Print Network [OSTI]

    Hu, Jiankun

    A Framework for Distributed Key Management Schemes in Heterogeneous Wireless Sensor Networks Kejie propose a framework for key management schemes in distributed wireless sensor networks with heterogeneous, the wireless sensor network can achieve higher key connectivity and higher resilience. I. INTRODUCTION Wireless

  15. Heterogeneous Wireless Sensor Network Deployment and Topology Control Based on Irregular Sensor Model

    E-Print Network [OSTI]

    Chung, Yeh-Ching

    Heterogeneous Wireless Sensor Network Deployment and Topology Control Based on Irregular Sensor Introduction Wireless sensor network (WSN) is a key element of the pervasive/ubiquitous computing sensor network (heterogeneous WSN) consists of sensor nodes with different ability, such as different

  16. Towards an Integrated BPM Schema: Control Flow Heterogeneity of PNML and BPEL4WS

    E-Print Network [OSTI]

    Zdun, Uwe

    Towards an Integrated BPM Schema: Control Flow Heterogeneity of PNML and BPEL4WS Jan Mendling1 to identify extensions to the schema integration process in order to capture such specifics of BPM schemas. 1 Introduction Heterogeneity of Business Process Modelling (BPM) schemas is a notorious prob- lem for business

  17. Distribution of Agents with Multiple Capabilities in Heterogeneous Multiagent Networks A Graph Theoretic View

    E-Print Network [OSTI]

    Egerstedt, Magnus

    Distribution of Agents with Multiple Capabilities in Heterogeneous Multiagent Networks ­ A Graph networks. I. INTRODUCTION One of the challenges in heterogeneous networks is to optimally distribute agents more fundamental concern is if such a distribution is possible at all for a given network topology. We

  18. Performance and Reliability of Non-Markovian Heterogeneous Distributed Computing Systems

    E-Print Network [OSTI]

    Hayat, Majeed M.

    Performance and Reliability of Non-Markovian Heterogeneous Distributed Computing Systems Jorge E-of-service (QoS), and service reliability associated with heterogeneous parallel and distributed computing and system settings for which the Markovian setting, resulting from employing an exponential- distribution

  19. The influence of rock heterogeneity on the scaling properties of simulated3 and natural stylolites4

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 1 2 The influence of rock heterogeneity on the scaling properties of simulated3 and natural prominent deformation patterns in sedimentary rocks that24 document localized pressure solution. Recent is caused by the composition of27 the host rock, i.e. heterogeneities in the material, or is governed

  20. Static Mapping of Subtasks in a Heterogeneous Ad Hoc Grid Environment

    E-Print Network [OSTI]

    Maciejewski, Anthony A.

    Static Mapping of Subtasks in a Heterogeneous Ad Hoc Grid Environment Sameer Shivle1 , Ralph to efficiently map tasks to machines in an ad hoc grid so as to minimize the energy consumed due to communication University George T. Abell Endowment. Abstract An ad hoc grid is a heterogeneous computing and communication

  1. Critical Path and Area Based Scheduling of Parallel Task Graphs on Heterogeneous Platforms

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Critical Path and Area Based Scheduling of Parallel Task Graphs on Heterogeneous Platforms Tchimou research has been done in the context of single homogeneous clus- ters, heterogeneous platforms have become) a novel "virtual" cluster methodology for handling platform het- erogeneity; (ii) a novel task placement

  2. Selenium and Lung Cancer: A Quantitative Analysis of Heterogeneity in the Current

    E-Print Network [OSTI]

    California at Berkeley, University of

    Selenium and Lung Cancer: A Quantitative Analysis of Heterogeneity in the Current Epidemiological on sele- nium and lung cancer and identify sources of heterogeneity among studies. When all studies were.30). Overall, these results suggest that selenium may have some protective effect against lung cancer

  3. Superdiffusive, heterogeneous, and collective particle motion near the fluid-solid transition in

    E-Print Network [OSTI]

    Berthier, Ludovic

    heterogeneity near glass transitions, we discover a number of original signatures of the jamming transition show that dynamic heterogeneities in dense athermal systems and glass formers are very different to foams and granular materials are dense assemblies of non-Brownian particles [1]. Since thermal energy

  4. Superdiffusive, heterogeneous, and collective particle motion near the jamming transition in athermal disordered materials

    E-Print Network [OSTI]

    Boyer, Edmond

    -to-solid, jamming transition. Borrowing tools developed to study dynamic heterogeneity near glass transitions, we heterogeneities in dense athermal systems and glass-formers are very different, and shed light on recent assemblies. INTRODUCTION Many materials, from emulsions and suspensions to foams and granular materials

  5. Multiscale Universal Interface: A Concurrent Framework for Coupling Heterogeneous Solvers

    E-Print Network [OSTI]

    Tang, Yu-Hang; Bian, Xin; Li, Zhen; Karniadakis, George E

    2014-01-01T23:59:59.000Z

    Concurrently coupled numerical simulations using heterogeneous solvers are powerful tools for modeling multiscale phenomena. However, major modifications to existing codes are often required to enable such simulations, posing significant difficulties in practice. In this paper we present a C++ library, i.e. the Multiscale Universal Interface (MUI), which is capable of facilitating the coupling effort for a wide range of multiscale simulations. The library adopts a header-only form with minimal external dependency and hence can be easily dropped into existing codes. A data sampler concept is introduced, combined with a hybrid dynamic/static typing mechanism, to create an easily customizable framework for solver-independent data interpretation. The library integrates MPI MPMD support and an asynchronous communication protocol to handle inter-solver information exchange irrespective of the solvers' own MPI awareness. Template metaprogramming is heavily employed to simultaneously improve runtime performance and c...

  6. Heterogeneous electrocatalysis in porous cathodes of solid oxide fuel cells

    E-Print Network [OSTI]

    Fu, Y; Bertei, A; Qi, C; Mohanram, A; Pietras, J D; Bazant, M Z

    2014-01-01T23:59:59.000Z

    A general physics-based model is developed for heterogeneous electrocatalysis in porous electrodes and used to predict and interpret the impedance of solid oxide fuel cells. This model describes the coupled processes of oxygen gas dissociative adsorption and surface diffusion of the oxygen intermediate to the triple phase boundary, where charge transfer occurs. The model accurately captures the Gerischer-like frequency dependence and the oxygen partial pressure dependence of the impedance of symmetric cathode cells. Digital image analysis of the microstructure of the cathode functional layer in four different cells directly confirms the predicted connection between geometrical properties and the impedance response. As in classical catalysis, the electrocatalytic activity is controlled by an effective Thiele modulus, which is the ratio of the surface diffusion length (mean distance from an adsorption site to the triple phase boundary) to the surface boundary layer length (square root of surface diffusivity div...

  7. Cryogenic homogenization and sampling of heterogeneous multi-phase feedstock

    DOE Patents [OSTI]

    Doyle, Glenn Michael (Lakewood, CO); Ideker, Virgene Linda (Arvada, CO); Siegwarth, James David (Boulder, CO)

    2002-01-01T23:59:59.000Z

    An apparatus and process for producing a homogeneous analytical sample from a heterogenous feedstock by: providing the mixed feedstock, reducing the temperature of the feedstock to a temperature below a critical temperature, reducing the size of the feedstock components, blending the reduced size feedstock to form a homogeneous mixture; and obtaining a representative sample of the homogeneous mixture. The size reduction and blending steps are performed at temperatures below the critical temperature in order to retain organic compounds in the form of solvents, oils, or liquids that may be adsorbed onto or absorbed into the solid components of the mixture, while also improving the efficiency of the size reduction. Preferably, the critical temperature is less than 77 K (-196.degree. C.). Further, with the process of this invention the representative sample may be maintained below the critical temperature until being analyzed.

  8. Precipitation of heterogeneous nanostructures: Metal nanoparticles and dielectric nanocrystallites

    SciTech Connect (OSTI)

    Masai, Hirokazu; Takahashi, Yoshihiro; Fujiwara, Takumi [Department of Applied Physics, Tohoku University, 6-6-05, Aoba, Aoba-ku, Sendai 980-8579 (Japan); Tokuda, Yomei; Yoko, Toshinobu [Institute for Chemical Research, Kyoto University, Gokasyo, Uji, Kyoto 611-0011 (Japan)

    2010-07-15T23:59:59.000Z

    Heterogeneous precipitation of nanocrystallites of metallic Bi and anatase was observed in CaO-Bi{sub 2}O{sub 3}-B{sub 2}O{sub 3}-Al{sub 2}O{sub 3}-TiO{sub 2} glass-ceramics. Addition of AlN reduced the Bi{sub 2}O{sub 3} to Bi metal nanoparticles, which were uniformly dispersed in the glass. After heat-treatment of the Bi-precipitated glass around the glass transition temperature, nanocrystalline anatase precipitated out without aggregation of the Bi metal particles. It was found that the anatase nanocrystal size was affected by the distance between a nanocrystal and a precipitated Bi nanoparticle. The glass-ceramic produced is a functional material containing a random dispersion of different types of nanoparticles with different dielectric constants.

  9. Assessment of HCDA energetics in the CRBRP heterogeneous reactor core

    SciTech Connect (OSTI)

    Rhow, S K; Switick, D M; McElroy, J L; Joe, B W; Elawar, Z J

    1981-03-27T23:59:59.000Z

    The results of hypothetical core disruptive event analyses for the CRBRP heterogeneous reactor core are reported. The analytical results cover a large number of parametric cases including variations in design parameters and phenomenological assumptions. Reactor core configurations at the beginning of cycle one and end of cycle four are evaluated. The energetic consequences are evaluated based upon both fuel expansion thermodynamic work potential and a relative probability assignment. It is concluded that the structural loads, which result from 101 megajoules of available expansion work at sodium slug impact on the reactor closure head (equivalent to 661 megajoules of fuel expansion work to one atmosphere), is an adequate energetic consequence envelope for use in specifying the Structural Margins Beyond the Design Basis.

  10. Transient Flow in a Heterogeneous Vadose Zone with Uncertain Parameters

    SciTech Connect (OSTI)

    A. M. Tartakovsky; Luis Garcia-Naranjo; Daniel M. Tartakovsky

    2004-02-01T23:59:59.000Z

    We consider transient flow in unsaturated heterogeneous porous media with uncertain hydraulic parameters. Our aim is to provide unbiased predictions (estimates) of system states, such as pressure head, water content, and fluxes, and to quantify the uncertainty associated with such predictions. We achieve this goal by treating hydraulic parameters as random fields and the corresponding flow equations as stochastic. Current stochastic analyses of transient flow in partially saturated soils require linearization of the constitutive relations, which may lead to significant inaccuracies when these relations are highly nonlinear. If relative conductivity and saturation vary exponentially with pressure and the corresponding scaling parameters are random variables, the transient Richards equation is mapped onto a linear equation by means of the Kirchhoff transformation. This allows us to develop deterministic differential equations for the first and second ensemble moments of pressure and saturation. We solve these equations analytically, for vertical infiltration, and compare them with direct Monte Carlo simulations.

  11. A discrete model for compressible flows in heterogeneous media

    SciTech Connect (OSTI)

    Le Metayer, O., E-mail: Olivier.Lemetayer@polytech.univ-mrs.f [IUSTI, UMR CNRS 6595, Universite Aix-Marseille I, Technopole de Chateau Gombert, 5 Rue E. Fermi, 13453 Marseille Cedex 13 (France); SMASH project, INRIA, 2004 route des Lucioles, 06902 Sophia Antipolis (France); Massol, A., E-mail: Alexandre.Massol@airbus.co [AIRBUS Operations SAS, Coc Powerplant, EDET30, M0112/5, 316 Route de Bayonne, 31060 Toulouse Cedex 09 (France); Favrie, N., E-mail: Nicolas.Favrie@polytech.univ-mrs.f [IUSTI, UMR CNRS 6595, Universite Aix-Marseille I, Technopole de Chateau Gombert, 5 Rue E. Fermi, 13453 Marseille Cedex 13 (France); SMASH project, INRIA, 2004 route des Lucioles, 06902 Sophia Antipolis (France); Hank, S., E-mail: Sarah.Hank@polytech.univ-mrs.f [IUSTI, UMR CNRS 6595, Universite Aix-Marseille I, Technopole de Chateau Gombert, 5 Rue E. Fermi, 13453 Marseille Cedex 13 (France); SMASH project, INRIA, 2004 route des Lucioles, 06902 Sophia Antipolis (France)

    2011-04-01T23:59:59.000Z

    This work deals with the building of a discrete model able to describe and to predict the evolution of complex gas flows in heterogeneous media. In many physical applications, large scales numerical simulation is no longer possible because of a lack of computing resources. Indeed the medium topology may be complex due to the presence of many obstacles (walls, pipes, equipments, geometric singularities etc.). Aircraft powerplant compartments are examples where topology is complex due to the presence of pipes, ducts, coolers and other equipment. Other important examples are gas explosions and large scale dispersion of hazardous materials in urban places, cities or underground involving obstacles such as buildings and various infrastructures. In all cases efficient safety responses are required. Then a new discrete model is built and solved in reasonable execution times for large cells volumes including such obstacles. Quantitative comparisons between experimental and numerical results are shown for different significant test cases, showing excellent agreement.

  12. Heterogeneity of cells may explain allometric scaling of metabolic rate

    E-Print Network [OSTI]

    Takemoto, Kazuhiro

    2015-01-01T23:59:59.000Z

    The origin of allometric scaling of metabolic rate is a long-standing question in biology. Several models has been proposed for explaining the origin; however, they have advantages and disadvantages. In particular, previous models only demonstrate either two important observations for the allometric scaling: the variability of scaling exponents and predominance of 3/4-power law. Thus, these models have a dispute over their validity. In this study, we propose a simple geometry model, and show that a hypothesis that total surface area of cells determines metabolic rate can reproduce these two observations by combining two concepts: the impact of cell sizes on metabolic rate and fractal-like (hierarchical) organization. The proposed model both theoretically and numerically demonstrates the approximately 3/4-power law although several different biological strategies are considered. The model validity is confirmed using empirical data. Furthermore, the model suggests the importance of heterogeneity of cell size fo...

  13. Micro-Scale Heterogeneity in Biogeochemical Uranium Cycling

    SciTech Connect (OSTI)

    Ginder-Vogel, M.; Wu, W.-M.; Kelly, S.; Criddle, C.S.; Carley, J.; Jardine, P.; Kemner, K.M.; Fendorf, S.

    2009-06-04T23:59:59.000Z

    One method for the in situ remediation of uranium contaminated subsurface environments is the removal of highly soluble U(VI) from groundwater by microbial reduction to the sparingly soluble U(IV) mineral uraninite. Success of this remediation strategy will, in part, be determined by the extent and products of microbial reduction. In heterogeneous subsurface environments, microbial processes will likely yield a combination of U(IV) and U(VI) phases distributed throughout the soil matrix. Here, we use a combination of bulk X-ray absorption spectroscopy (XAS) and micro-focused XAS and X-ray diffraction to determine uranium speciation and distribution with sediment from a pilot-scale uranium remediation project located in Oak Ridge, TN.

  14. Energy-Aware Task Partitioning on Heterogeneous Multiprocessor Platforms

    E-Print Network [OSTI]

    Saad, Elsayed; Shalan, Mohamed; Elewi, Abdullah

    2012-01-01T23:59:59.000Z

    Efficient task partitioning plays a crucial role in achieving high performance at multiprocessor plat forms. This paper addresses the problem of energy-aware static partitioning of periodic real-time tasks on heterogeneous multiprocessor platforms. A Particle Swarm Optimization variant based on Min-min technique for task partitioning is proposed. The proposed approach aims to minimize the overall energy consumption, meanwhile avoid deadline violations. An energy-aware cost function is proposed to be considered in the proposed approach. Extensive simulations and comparisons are conducted in order to validate the effectiveness of the proposed technique. The achieved results demonstrate that the proposed partitioning scheme significantly surpasses previous approaches in terms of both number of iterations and energy savings.

  15. Multiscale heterogeneity characterization of tidal channel, tidal delta and foreshore facies, Almond Formation outcrops, Rock Springs uplift, Wyoming

    SciTech Connect (OSTI)

    Schatzinger, R.A.; Tomutsa, L. [BDM Petroleum Technologies, Bartlesville, OK (United States)

    1997-08-01T23:59:59.000Z

    In order to accurately predict fluid flow within a reservoir, variability in the rock properties at all scales relevant to the specific depositional environment needs to be taken into account. The present work describes rock variability at scales from hundreds of meters (facies level) to millimeters (laminae) based on outcrop studies of the Almond Formation. Tidal channel, tidal delta and foreshore facies were sampled on the eastern flank of the Rock Springs uplift, southeast of Rock Springs, Wyoming. The Almond Fm. was deposited as part of a mesotidal Upper Cretaceous transgressive systems tract within the greater Green River Basin. Bedding style, lithology, lateral extent of beds of bedsets, bed thickness, amount and distribution of depositional clay matrix, bioturbation and grain sorting provide controls on sandstone properties that may vary more than an order of magnitude within and between depositional facies in outcrops of the Almond Formation. These features can be mapped on the scale of an outcrop. The products of diagenesis such as the relative timing of carbonate cement, scale of cemented zones, continuity of cemented zones, selectively leached framework grains, lateral variability of compaction of sedimentary rock fragments, and the resultant pore structure play an equally important, although less predictable role in determining rock property heterogeneity. A knowledge of the spatial distribution of the products of diagenesis such as calcite cement or compaction is critical to modeling variation even within a single facies in the Almond Fin. because diagenesis can enhance or reduce primary (depositional) rock property heterogeneity. Application of outcrop heterogeneity models to the subsurface is greatly hindered by differences in diagenesis between the two settings. The measurements upon which this study is based were performed both on drilled outcrop plugs and on blocks.

  16. Dynamical Transition and Heterogeneous Hydration Dynamics in RNA

    E-Print Network [OSTI]

    Jeseong Yoon; Jong-Chin Lin; Changbong Hyeon; D. Thirumalai

    2014-04-24T23:59:59.000Z

    Enhanced dynamical fluctuations of RNAs, facilitated by a network of water molecules with strong interactions with RNA, are suspected to be critical in their ability to respond to a variety of cellular signals. Using atomically detailed molecular dynamics simulations at various temperatures of purine (adenine)- and preQ$_1$ sensing riboswitch aptamers, we show that water molecules in the vicinity of RNAs undergo complex dynamics depending on the local structures of the RNAs. The overall lifetimes of hydrogen bonds (HBs) of surface bound waters are more than at least 1-2 orders of magnitude longer than bulk water. Slow hydration dynamics, revealed in non-Arrhenius behavior of the relaxation time, arises from high activation barriers to break water hydrogen bonds with a nucleotide and by reduced diffusion of water. The relaxation kinetics at specific locations in the two RNAs show a broad spectrum of time scales reminiscent of glass-like behavior, suggesting that the hydration dynamics is highly heterogeneous. Both RNAs undergo dynamic transition at $T = T_D \\gtrsim 200$ K as assessed by the mean square fluctuation of hydrogen atoms $\\langle x^2\\rangle$, which undergoes an abrupt harmonic-to-anharmonic transition at $T_D$. The near universal value of $T_D$ found for these RNAs and previously for tRNA is strongly correlated with changes in hydration dynamics as $T$ is altered. Hierarchical dynamics of waters associated with the RNA surface, revealed in the motions of distinct classes of water with well-separated time scales, reflects the heterogeneous local environment on the molecular surface of RNA. At low temperatures slow water dynamics predominates over structural transitions. Our study demonstrates that the complex interplay of dynamics between water and local environment in the RNA structures could be a key determinant of the functional activities of RNA.

  17. Converting Homogeneous to Heterogeneous in Electrophilic Catalysis using Monodisperse Metal Nanoparticles

    SciTech Connect (OSTI)

    Witham, Cole A.; Huang, Wenyu; Tsung, Chia-Kuang; Kuhn, John N.; Somorjai, Gabor A.; Toste, F. Dean

    2009-10-15T23:59:59.000Z

    A continuing goal in catalysis is the transformation of processes from homogeneous to heterogeneous. To this end, nanoparticles represent a new frontier in heterogeneous catalysis, where this conversion is supplemented by the ability to obtain new or divergent reactivity and selectivity. We report a novel method for applying heterogeneous catalysts to known homogeneous catalytic reactions through the design and synthesis of electrophilic platinum nanoparticles. These nanoparticles are selectively oxidized by the hypervalent iodine species PhICl{sub 2}, and catalyze a range of {pi}-bond activation reactions previously only homogeneously catalyzed. Multiple experimental methods are utilized to unambiguously verify the heterogeneity of the catalytic process. The discovery of treatments for nanoparticles that induce the desired homogeneous catalytic activity should lead to the further development of reactions previously inaccessible in heterogeneous catalysis. Furthermore, our size and capping agent study revealed that Pt PAMAM dendrimer-capped nanoparticles demonstrate superior activity and recyclability compared to larger, polymer-capped analogues.

  18. Approaches to identifying reservoir heterogeneity and reserve growth opportunities from subsurface data: The Oficina Formation, Budare field, Venezuela

    SciTech Connect (OSTI)

    Hamilton, D.S.; Raeuchle, S.K.; Holtz, M.H. [Bureau of Economic Geology, Austin, TX (United States)] [and others

    1997-08-01T23:59:59.000Z

    We applied an integrated geologic, geophysical, and engineering approach devised to identify heterogeneities in the subsurface that might lead to reserve growth opportunities in our analysis of the Oficina Formation at Budare field, Venezuela. The approach involves 4 key steps: (1) Determine geologic reservoir architecture; (2) Investigate trends in reservoir fluid flow; (3) Integrate fluid flow trends with reservoir architecture; and (4) Estimate original oil-in-place, residual oil saturation, and remaining mobile oil, to identify opportunities for reserve growth. There are three main oil-producing reservoirs in the Oficina Formation that were deposited in a bed-load fluvial system, an incised valley-fill, and a barrier-strandplain system. Reservoir continuity is complex because, in addition to lateral facies variability, the major Oficina depositional systems were internally subdivided by high-frequency stratigraphic surfaces. These surfaces define times of intermittent lacustrine and marine flooding events that punctuated the fluvial and marginal marine sedimentation, respectively. Syn and post depositional faulting further disrupted reservoir continuity. Trends in fluid flow established from initial fluid levels, response to recompletion workovers, and pressure depletion data demonstrated barriers to lateral and vertical fluid flow caused by a combination of reservoir facies pinchout, flooding shale markers, and the faults. Considerable reserve growth potential exists at Budare field because the reservoir units are highly compartment by the depositional heterogeneity and structural complexity. Numerous reserve growth opportunities were identified in attics updip of existing production, in untapped or incompletely drained compartments, and in field extensions.

  19. Heterogeneous Chemistry of Individual Mineral Dust Particles from Different Dust Source Regions: The Importance of Particle Mineralogy

    SciTech Connect (OSTI)

    Krueger, Brenda J.; Grassian, Vicki H.; Cowin, James P.; Laskin, Alexander

    2004-11-01T23:59:59.000Z

    The heterogeneous chemistry of individual dust particles from four different dust source regions is investigated on a particle-by-particle basis using state-of-the-art scanning electron microscopy techniques including computer-controlled scanning electron microscopy/computer-controlled X-ray analysis (CCSEM/EDX). Morphology and compositional changes of individual particles as they react with nitric acid are observed. Clear differences in the reactivity of mineral dusts from these four different dust regions with nitric acid could be observed. Mineral dust from source regions containing high levels of calcium, such as those found in parts of China and Saudi Arabia, are found to react to the greatest extent. Calcium containing minerals, such as calcite (CaCO3) and dolomite (CaMg(CO3)2), react to form nitrate salt whereas other calcium containing minerals such as gypsum (CaSO4?2H2O) do not react. The importance of particle chemical composition and mineralogy in the heterogeneous chemistry of mineral dust aerosols is definitively borne out in this study of individual dust particles.

  20. Robustness of intratumour 18F-FDG PET uptake heterogeneity quantification for therapy response prediction in ooesophageal carcinoma

    E-Print Network [OSTI]

    Brest, Université de

    1 Robustness of intratumour 18F-FDG PET uptake heterogeneity quantification for therapy response title: Robustness of FDG PET tumour heterogeneity quantification Corresponding author: M. Hatt, INSERM;2 ABSTRACT: PURPOSE: Intra-tumour uptake heterogeneity in PET quantified through textural features

  1. Efficient Heterogeneous Execution on Large Multicore and Accelerator Platforms: Case Study Using a Block Tridiagonal Solver

    SciTech Connect (OSTI)

    Park, Alfred J [ORNL] [ORNL; Perumalla, Kalyan S [ORNL] [ORNL

    2013-01-01T23:59:59.000Z

    The algorithmic and implementation principles are explored in gainfully exploiting GPU accelerators in conjunction with multicore processors on high-end systems with large numbers of compute nodes, and evaluated in an implementation of a scalable block tridiagonal solver. The accelerator of each compute node is exploited in combination with multicore processors of that node in performing block-level linear algebra operations in the overall, distributed solver algorithm. Optimizations incorporated include: (1) an efficient memory mapping and synchronization interface to minimize data movement, (2) multi-process sharing of the accelerator within a node to obtain balanced load with multicore processors, and (3) an automatic memory management system to efficiently utilize accelerator memory when sub-matrices spill over the limits of device memory. Results are reported from our novel implementation that uses MAGMA and CUBLAS accelerator software systems simultaneously with ACML for multithreaded execution on processors. Overall, using 940 nVidia Tesla X2090 accelerators and 15,040 cores, the best heterogeneous execution delivers a 10.9-fold reduction in run time relative to an already efficient parallel multicore-only baseline implementation that is highly optimized with intra-node and inter-node concurrency and computation-communication overlap. Detailed quantitative results are presented to explain all critical runtime components contributing to hybrid performance.

  2. Experimental characterization and crystal plasticity modeling of heterogeneous deformation in polycrystalline -Ti

    SciTech Connect (OSTI)

    Wang, Leyun [Michigan State University, East Lansing; Barabash, Rozaliya [ORNL; Yang, Y [Michigan State University, East Lansing; Bieler, Prof T R [Michigan State University, East Lansing; Crimp, Prof M A [Michigan State University, East Lansing; Eisenlohr, P [Max-Planck-Institut fur Eisenforschung, Germany; Liu, W. [Argonne National Laboratory (ANL); Ice, Gene E [ORNL

    2011-01-01T23:59:59.000Z

    Grain-level heterogeneous deformation was studied in a polycrystalline {alpha}-Ti specimen deformed by four-point bending. Dislocation slip activity in the microstructure was investigated by surface slip trace analysis. Three-dimensional-X-ray diffraction (3D-XRD) was used to investigate subsurface lattice rotations and to identify geometrically necessary dislocations (GNDs). The slip systems of local GNDs were analyzed by studying the streaking directions of reflections in corresponding Laue patterns. The analysis performed in one grain indicated that the subsurface GNDs were from the same slip system identified using slip trace analysis in backscattered electron images. A crystal plasticity finite element (CPFE) model was used to simulate deformation of the same microstructural region. The predictions of dislocation slip activity match the general aspects of the experimental observations, including the ability to simulate the activation of different slip systems in grains where multiple slip systems were activated. Prediction of local crystal rotations, however, was the least accurate aspect of the CPFE model.

  3. Bifurcation behavior in homogeneous-heterogeneous combustion. Part 2; Computations for stagnation-point flow

    SciTech Connect (OSTI)

    Song, X.; Williams, W.R.; Schmidt, L.D.; Aris, R. (Dept. of Chemical Engineering and Materials Science, Univ. of Minnesota, Minneapolis, MN (US))

    1991-04-01T23:59:59.000Z

    Bifurcation analysis of ignition and extinction of combustion in stagnation-point flow was carried out for conditions when both homogeneous and heterogeneous reactions can occur. A technique based on the bifurcation theory and the shooting algorithm is developed, which permits fast and efficient tracking of bifurcation in these systems. The influences of the different parameters on the ignition and extinction behavior were investigated by assuming (1) only catalytic surface (heterogeneous) reaction, (2) only homogeneous reaction on a hot inert surface, and (3) both surface and homogeneous reactions. The coupling effects of the homogeneous and heterogeneous reactions are clearly demonstrated. It is shown that the heterogeneous reaction dominates the system behavior at the lower temperature while both homogeneous and heterogeneous reactions play important role at higher temperature. It is predicted that the homogeneous ignition temperature is higher with surface reaction than without surface reaction. However, homogeneous-heterogeneous or homogeneous reaction alone. The numerical results for propane and for methane oxidation on platinum foil also show good qualitative agreements with the experimental results of Part I of this article, which include the two types of ignition, extinction and autothermal behavior of homogeneous-heterogeneous reactions.

  4. SEISMIC DETERMINATION OF RESERVOIR HETEROGENEITY; APPLICATION TO THE CHARACTERIZATION OF HEAVY OIL RESERVOIRS

    SciTech Connect (OSTI)

    Matthias G. Imhof; James W. Castle

    2003-11-01T23:59:59.000Z

    The objective of the project is to examine how seismic and geologic data can be used to improve characterization of small-scale heterogeneity and their parameterization in reservoir models. The study is performed at West Coalinga Field in California. We continued our investigation on the nature of seismic reactions from heterogeneous reservoirs. We began testing our algorithm to infer parameters of object-based reservoir models from seismic data. We began integration of seismic and geologic data to determine the deterministic limits of conventional seismic data interpretation. Lastly, we began integration of seismic and geologic heterogeneity using stochastic models conditioned both on wireline and seismic data.

  5. Classification of Message Spreading in a Heterogeneous Social Network

    E-Print Network [OSTI]

    Jendoubi, Siwar; Liétard, Ludovic; Yaghlane, Boutheina Ben

    2015-01-01T23:59:59.000Z

    Nowadays, social networks such as Twitter, Facebook and LinkedIn become increasingly popular. In fact, they introduced new habits, new ways of communication and they collect every day several information that have different sources. Most existing research works fo-cus on the analysis of homogeneous social networks, i.e. we have a single type of node and link in the network. However, in the real world, social networks offer several types of nodes and links. Hence, with a view to preserve as much information as possible, it is important to consider so-cial networks as heterogeneous and uncertain. The goal of our paper is to classify the social message based on its spreading in the network and the theory of belief functions. The proposed classifier interprets the spread of messages on the network, crossed paths and types of links. We tested our classifier on a real word network that we collected from Twitter, and our experiments show the performance of our belief classifier.

  6. IMPROVING CO2 EFFICIENCY FOR RECOVERING OIL IN HETEROGENEOUS RESERVOIRS

    SciTech Connect (OSTI)

    Reid B. Grigg; Robert K. Svec; Zheng-Wen Zeng; Liu Yi; Baojun Bai

    2003-05-01T23:59:59.000Z

    A three-year contract for the project, DOE Contract No. DE-FG26-01BC15364, ''Improving CO{sub 2} Efficiency for Recovering Oil in Heterogeneous Reservoirs,'' was awarded and started on September 28, 2001. This project examines three major areas in which CO2 flooding can be improved: fluid and matrix interactions, conformance control/sweep efficiency, and reservoir simulation for improved oil recovery. This report discusses the activity during the six-month period covering October 1, 2002 through March 31, 2003 that covers the first and second fiscal quarters of the project's second year. During these two quarters of the project we have been working in several areas: reservoir fluid/rock interactions and their relationships to changing injectivity, and surfactant adsorption on quarried core and pure component granules, foam stability, and high flow rate effects. We also had a very productive project review in Midland, Texas. A paper on CO{sub 2}-brine-reservoir rock interaction was presented and included in the proceedings of the SPE International Symposium on Oilfield Chemistry, Houston, 5-8 February, 2003. Papers have been accepted for the Second Annual Conference on Carbon Sequestration in Alexandria, VA in May, the Society of Core Analysis meeting in Pau, France in September, and two papers for the SPE Annual Meeting in Denver, CO in October.

  7. Heterogeneity and dynamics in villin headpiece crystal structures

    SciTech Connect (OSTI)

    Meng, Jianmin; McKnight, Christopher James, E-mail: cjmck@bu.edu [Boston University School of Medicine (United States)

    2009-05-01T23:59:59.000Z

    New crystal structures of the well studied protein-folding model system villin headpiece in a new space group provide insights into the conformations available in the folded state. The villin headpiece domain (HP67) is the C-terminal F-actin-binding motif that confers F-actin-bundling activity to villin, a component of the actin bundles that support the brush-border microvilli. It has been investigated extensively by both experimental and theoretical measurements. Our laboratory, for example, has determined both its NMR and its crystal structures. This study presents the structures of HP67 and its pH-stabilized mutant (H41Y) in a different crystal form and space group. For both constructs, two molecules are found in each asymmetric unit in the new space group P6{sub 1}. While one of the two structures (Mol A) is structurally similar to our previously determined structure (Mol X), the other (Mol B) has significant deviations, especially in the N-terminal subdomain, where lattice contacts do not appear to contribute to the difference. In addition, the structurally most different crystal structure, Mol B, is actually closer to the averaged NMR structure. Harmonic motions, as suggested by the B-factor profiles, differ between these crystal structures; crystal structures from the same space group share a similar pattern. Thus, heterogeneity and dynamics are observed in different crystal structures of the same protein even for a protein as small as villin headpiece.

  8. Supporting Dynamic Spectrum Access in Heterogeneous LTE+ Networks

    SciTech Connect (OSTI)

    Luiz A. DaSilva; Ryan E. Irwin; Mike Benonis

    2012-08-01T23:59:59.000Z

    As early as 2014, mobile network operators’ spectral capac- ity is expected to be overwhelmed by the demand brought on by new devices and applications. With Long Term Evo- lution Advanced (LTE+) networks likely as the future one world 4G standard, network operators may need to deploy a Dynamic Spectrum Access (DSA) overlay in Heterogeneous Networks (HetNets) to extend coverage, increase spectrum efficiency, and increase the capacity of these networks. In this paper, we propose three new management frameworks for DSA in an LTE+ HetNet: Spectrum Accountability Client, Cell Spectrum Management, and Domain Spectrum Man- agement. For these spectrum management frameworks, we define protocol interfaces and operational signaling scenar- ios to support cooperative sensing, spectrum lease manage- ment, and alarm scenarios for rule adjustment. We also quan- tify, through integer programs, the benefits of using DSA in an LTE+ HetNet, that can opportunistically reuse vacant TV and GSM spectrum. Using integer programs, we consider a topology using Geographic Information System data from the Blacksburg, VA metro area to assess the realistic benefits of DSA in an LTE+ HetNet.

  9. Ultrafast heterogeneous electron transfer reactions: Comparative theoretical studies on time- and frequency-domain data

    SciTech Connect (OSTI)

    Wang Luxia; Willig, Frank; May, Volkhard [Institut fuer Physik, Humboldt-Universitaet zu Berlin, Newtonstrasse 15, D-12489 Berlin (Germany); Hahn-Meitner-Institut, Abteilung Dynamik von Genzflaechenreaktionen, Glienicker Strasse 100, 14109 Berlin (Germany); Institut fuer Physik, Humboldt-Universitaet zu Berlin, Newtonstrasse 15, D-12489 Berlin (Germany)

    2006-01-07T23:59:59.000Z

    Recent theoretical studies on linear absorption spectra of dye-semiconductor systems [perylene attached to nanostructured TiO{sub 2}, L. Wang et al., J. Phys. Chem. B 109, 9589 (2005)] are extended here in different respects. Since the systems show ultrafast photoinduced heterogeneous electron transfer the time-dependent formulation used to compute the absorbance is also applied to calculate the temporal evolution of the sub-100 fs charge injection dynamics after a 10 fs laser-pulse excitation. These studies complement our recent absorption spectra fit for two perylene bridge-anchor group TiO{sub 2} systems. Moreover, the time-dependent formulation of the absorbance is confronted with a frequency-domain description. The latter underlines the central importance of the self-energy caused by the coupling of the dye levels to the semiconductor band continuum. The used model is further applied to study the effect of different parameters such as (1) the dependence on the reorganization energies of the involved intramolecular transitions, (2) the effect of changing the transfer integral which couples the excited dye state with the band continuum, and (3) the effect of the concrete form of the semiconductor band density of states. Emphasis is also put on the case where the charge injection level of the dye is near or somewhat below the band edge. This nicely demonstrates the change from a structureless absorption to a well-resolved vibrational progression including characteristic shifts of the absorption lines which are a direct measure for the dye-semiconductor coupling.

  10. Plant Heterogeneity and Applied General Equilibrium Models of Trade: Lessons from

    E-Print Network [OSTI]

    Stoiciu, Mihai

    sector. I introduce these features by adapting a Hopenhayn (1992) model of plant entry and exit and embed a Hopenhayn (1992) model of firm entry and exit and embed this in a static multisector trade model with monop) develops a model with plant dynamics to match entry and exit rates in US manufacturing. I do

  11. Tiltmeter leveling mechanism

    DOE Patents [OSTI]

    Hunter, Steven L. (Livermore, CA); Boro, Carl O. (Milpitas, CA); Farris, Alvis (late of Byron, CA)

    2002-01-01T23:59:59.000Z

    A tiltmeter device having a pair of orthogonally disposed tilt sensors that are levelable within an inner housing containing the sensors. An outer housing can be rotated to level at least one of the sensor pair while the inner housing can be rotated to level the other sensor of the pair. The sensors are typically rotated up to about plus or minus 100 degrees. The device is effective for measuring tilts in a wide range of angles of inclination of wells and can be employed to level a platform containing a third sensor.

  12. Fractal: A Software Toolchain for Mapping Applications to Diverse, Heterogeneous Architecures

    E-Print Network [OSTI]

    Skadron, Kevin

    Fractal: A Software Toolchain for Mapping Applications to Diverse, Heterogeneous Architecures, 2011 Abstract We present Fractal, an API for programming parallel workloads on multithreaded and multicore architectures. Fractal schedules threads on processors with cache configuration in mind in order

  13. Theoretical and experimental studies of heterogeneous chemical processes leading to stratospheric ozone depletion

    E-Print Network [OSTI]

    Mantz, Yves André, 1974-

    2002-01-01T23:59:59.000Z

    The microscopic chemical mechanisms of heterogeneous reactions involving HC on crystalline ice and nitric acid trihydrate (NAT) are of fundamental interest to physical chemists, because such reactions yield "active" chlorine ...

  14. Numerical modeling of elastic wave scattering by near-surface heterogeneities

    E-Print Network [OSTI]

    Al Muhaidib, Abdulaziz

    2013-01-01T23:59:59.000Z

    A perturbation method for elastic waves and numerical forward modeling are used to calculate the effects of seismic wave scattering from arbitrary shape shallow subsurface heterogeneities. Wave propagation is simulated ...

  15. Ourcrop characterization of sandstone heterogeneity in Carboniferous reservoirs, Black Warrior basin, Alabama

    SciTech Connect (OSTI)

    Pashin, J.C.; Osborne, E.W.; Rindsberg, A.K.

    1991-08-01T23:59:59.000Z

    Where production is currently declining, improved recovery strategies, such as waterflooding, injection, strategic well placement, and infill drilling may be used to increase production of liquid hydrocarbons from reservoir sandstone in the Black Warrior basin. Characterizing reservoir heterogeneity provides information regarding how those strategies can best be applied, and exceptional exposures of asphaltic sandstone in north Alabama enable first-hand observation of such heterogeneity. This report identifies heterogeneity in Carboniferous strata of the Black Warrior basin on the basis of vertical variations, lithofacies analysis. Results of lithofacies analysis and depositional modeling were synthesized with existing models of sandstone heterogeneity to propose methods which may improve hydrocarbon recovery in Carboniferous sandstone reservoirs of the Black Warrior basin. 238 refs., 89 figs. 2 tabs.

  16. Multiscale Method for Elastic Wave Propagation in the Heterogeneous, Anisotropic Media

    E-Print Network [OSTI]

    Gao, Kai

    2014-08-05T23:59:59.000Z

    FEM) for elastic wave propagation in heterogeneous, anisotropic media in both continuous Galerkin (CG) and discontinuous Galerkin (DG) formulations. The advantage of the multiscale basis functions is they are model-dependent, unlike the predefined polynomial basis...

  17. Stochastic analysis of dense nonaqueous phase liquid dissolution in naturally heterogeneous subsurface systems

    E-Print Network [OSTI]

    Fu, Xin, 1973-

    2003-01-01T23:59:59.000Z

    Field-scale Dense Nonaqueous Phase Liquid (DNAPL) dissolution in three-dimensional heterogeneous subsurface systems is investigated using a stochastic approach that treats the variability of flow properties as three-dimensional ...

  18. Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer

    E-Print Network [OSTI]

    Zheng, Chunmiao

    Geophysical constraints on contaminant transport modeling in a heterogeneous fluvial aquifer Jerry the geophysically derived hydraulic conductivity representation in numerical simulations of the natural the effectiveness of geophysically derived and flowmeter based representations of the hydraulic conductivity field

  19. Heterogeneous chemistry of atmospheric mineral dust particles and their resulting cloud-nucleation properties

    E-Print Network [OSTI]

    Sullivan, Ryan Christopher

    2008-01-01T23:59:59.000Z

    chemical kinetics of N2O5 on CaCO3 and other atmosphericheterogeneous reaction of CaCO3 particles with gaseous HNO3heterogeneous reaction of CaCO3 particles with gaseous HNO3

  20. Impact of structured heterogeneities on reactive two-phase porous flow

    E-Print Network [OSTI]

    Reeves, Daniel

    Two-phase flow through heterogeneous media leads to scale-free distributions of irregularly shaped pockets of one fluid trapped within the other. Although reactions within these fluids are often modeled at the homogeneous ...

  1. Variations in organic aerosol optical and hygroscopic properties upon heterogeneous OH oxidation

    E-Print Network [OSTI]

    Cappa, Christopher D.

    Measurements of the evolution of organic aerosol extinction cross sections (?[subscript ext]) and subsaturated hygroscopicity upon heterogeneous OH oxidation are reported for two model compounds, squalane (a C30 saturated ...

  2. Intrinsic heterogeneity in the survival and proliferation capacities of naïve CD8? T cells

    E-Print Network [OSTI]

    Mahajan, Vinay Subhash

    2009-01-01T23:59:59.000Z

    This thesis describes the identification and characterization of a novel 'layer' of intrinsic non-genetic functional heterogeneity within the seemingly homogeneous naive CD8? T cell population in their survival and ...

  3. Resolving Cancer Heterogeneity by Single Cell Sequencing (7th Annual SFAF Meeting, 2012)

    ScienceCinema (OSTI)

    Xu, Xun [BGI

    2013-02-11T23:59:59.000Z

    Xun Xu on "Resolving Cancer Heterogeneity by Single Cell Sequencing" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

  4. Temperature-Dependent Heterogeneous Efflorescence of Mixed Ammonium Sulfate/Calcium Carbonate Particles

    E-Print Network [OSTI]

    Temperature-Dependent Heterogeneous Efflorescence of Mixed Ammonium Sulfate/Calcium Carbonate sulfate/calcium carbonate microparticles. Deliquescence and efflorescence relative humidities and calcium carbonate and (b) supersaturated with respect to ammonium sulfate and saturated with respect

  5. P and SV waves 3-D Numerical Modeling of AVOA from Heterogeneous Fractured Reservoirs

    E-Print Network [OSTI]

    Zhu, Xiang

    1997-01-01T23:59:59.000Z

    We study the effects of fracture-induced anisotropy and lateral fracture density heterogeneity on the reflected P and SV wave amplitude variation with offset and azimuth (AVOA), using 3-D finite-difference simulations. The ...

  6. Seismic Determination of Reservoir Heterogeneity: Application to the Characterization of Heavy Oil Reservoirs

    SciTech Connect (OSTI)

    Imhof, Matthias G.; Castle, James W.

    2003-03-12T23:59:59.000Z

    The objective of the project was to examine how seismic and geologic data could be used to improve characterization of small-scale heterogeneity and their parameterization in reservoir models. The study was performed at West Coalinga Field in California.

  7. Microwave-induced thermoacoustic tomography: applications and corrections for the effects of acoustic heterogeneities 

    E-Print Network [OSTI]

    Jin, Xing

    2009-05-15T23:59:59.000Z

    This research is primarily focused on developing potential applications for microwaveinduced thermoacoustic tomography and correcting for image degradations caused by acoustic heterogeneities. Microwave-induced thermoacoustic tomography was first...

  8. High-Resolution Characterization of Reservoir Heterogeneity and Connectivity in Clastic Environments

    E-Print Network [OSTI]

    Hull, Thomas Frederick

    2011-10-21T23:59:59.000Z

    This study developed new concepts and interpretative methods for mapping reservoir heterogeneity and connectivity of a fault controlled Wilcox clastic reservoir in Texas, USA. The application of high-resolution seismic enhancement in this study...

  9. Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial

    E-Print Network [OSTI]

    Boyer, Edmond

    Transformation of Sorbitol to Biofuels by Heterogeneous Catalysis: Chemical and Industrial ainsi que des exemples d'applications industrielles. Abstract -- Transformation of Sorbitol to Biofuels and biodiesel production led to first generation biofuels. Nowadays, research is focused on lignocellulosic

  10. On the depinning of a driven drop on a heterogeneous substrate

    E-Print Network [OSTI]

    Thiele, Uwe; Knobloch, Edgar

    2006-01-01T23:59:59.000Z

    contrasts and driving strengths µ. The thin lines corresponddriving the typical situation on a homogeneous substrate is as shown in ?gure 3 (dashed line).line (red online). heterogeneity. For very small driving it

  11. Sorption of strontium and fractal scaling of the heterogeneous media in a candidate VLLW disposal site

    E-Print Network [OSTI]

    Hu, Qinhong "Max"

    of the deposit and accumulation from the debris flow, the heterogeneous geological characteris- tics is obvious Sciences, Key Laboratory of Water and Sediment of the Ministry of Education, Beijing Normal University

  12. Groundwater flow in heterogeneous composite C. L. Winter and Daniel M. Tartakovsky

    E-Print Network [OSTI]

    Tartakovsky, Daniel M.

    Groundwater flow in heterogeneous composite aquifers C. L. Winter and Daniel M. Tartakovsky Hydrology: Stochastic processes; 1829 Hydrology: Groundwater hydrology; 1832 Hydrology: Groundwater, upscaled, decomposition 1. Introduction [2] It has become common to quantify uncertainty in groundwater

  13. Energy Department Advances Market Access for U.S. Firms in Chinese 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 ofNotices |NoticeEmployeeScience &

  14. New Jersey firm creates jobs and vital components for world-leading

    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:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire Solar541,9337, 2011R - 445 CU - 2SCIENCENewexperiment |

  15. JLab Recognizes Security Firm as Top Small Business Subcontractor for 2009

    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 PowerCherries 82981-1cnHigh SchoolIn12 Investigation PeerNOON 2004 FebruaryTimothy Hallman,|

  16. Jefferson Lab Awards $3.54 Million Contract To Pennsylvania Firm for 12 GeV

    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 PowerCherries 82981-1cnHigh SchoolIn12 Investigation PeerNOON...January 2015H8/0 en6/0Company

  17. Y-12 cleaning technology licensed by local engineering firm | Y-12 National

    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 ScienceandMesa del SolStrengtheningWildfires may contribute moredetection scoreAlexEmployees

  18. Regional firms receive ORNL's 2015 Small Business Impact Awards | ornl.gov

    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 Scienceand Requirements Recently Approved JustificationBio-Inspired PowerRegional companies

  19. SF 6432-FP Standard Terms and Conditions for Firm Fixed-price Contracts

    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 Scienceand Requirements RecentlyElectronicResourcesjobs RunningSEAB ReportsFE (04/2015) SECTIONFP

  20. Secretary Chu to Tour Leading Solar Firm in Boston Area | Department of

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

    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 742EnergyOn April 23, 2014,Zaleski - Policy Advisor, EnergyADepartment ofofTomorrow |

  1. Bayesian Semiparametric Models for Heterogeneous Cross-platform Differential Gene Expression

    E-Print Network [OSTI]

    Dhavala, Soma Sekhar

    2012-02-14T23:59:59.000Z

    BAYESIAN SEMIPARAMETRIC MODELS FOR HETEROGENEOUS CROSS-PLATFORM DIFFERENTIAL GENE EXPRESSION A Dissertation by SOMA SEKHAR DHAVALA Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of DOCTOR OF PHILOSOPHY December 2010 Major Subject: Statistics BAYESIAN SEMIPARAMETRIC MODELS FOR HETEROGENEOUS CROSS-PLATFORM DIFFERENTIAL GENE EXPRESSION A Dissertation by SOMA SEKHAR DHAVALA Submitted to the Office of Graduate Studies...

  2. 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

  3. Microbiological and Geochemical Heterogeneity in an In Situ

    E-Print Network [OSTI]

    Uranium Bioremediation; Field Site; Helen A. Vrionis; Robert T. Anderson; Irene Ortiz-bernad; Kathleen R. O’neill; Philip E. Long; Derek R. Lovley

    2005-01-01T23:59:59.000Z

    The geochemistry and microbiology of a uranium-contaminated subsurface environment that had undergone two seasons of acetate addition to stimulate microbial U(VI) reduction was examined. There were distinct horizontal and vertical geochemical gradients that could be attributed in large part to the manner in which acetate was distributed in the aquifer, with more reduction of Fe(III) and sulfate occurring at greater depths and closer to the point of acetate injection. Clone libraries of 16S rRNA genes derived from sediments and groundwater indicated an enrichment of sulfate-reducing bacteria in the order Desulfobacterales in sediment and groundwater samples. These samples were collected nearest the injection gallery where microbially reducible Fe(III) oxides were highly depleted, groundwater sulfate concentrations were low, and increases in acid volatile sulfide were observed in the sediment. Further down-gradient, metal-reducing conditions were present as indicated by intermediate Fe(II)/Fe(total) ratios, lower acid volatile sulfide values, and increased abundance of 16S rRNA gene sequences belonging to the dissimilatory Fe(III)- and U(VI)-reducing family Geobacteraceae. Maximal Fe(III) and U(VI) reduction correlated with maximal recovery of Geobacteraceae 16S rRNA gene sequences in both groundwater and sediment; however, the sites at which these maxima occurred were spatially separated within the aquifer. The substantial microbial and geochemical heterogeneity at this site demonstrates that attempts should be made to deliver acetate in a more uniform manner and that closely

  4. 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

  5. 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

  6. 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

  7. 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

  8. 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

  9. 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

  10. 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

  11. Modeling human supervisory control in heterogeneous unmanned vehicle systems

    E-Print Network [OSTI]

    Nehme, Carl, 1981-

    2009-01-01T23:59:59.000Z

    Given advanced technology that relieves the human operator of low-level tasking and the future vision for network-centric operations, operator supervisory control of Unmanned Vehicle (UV) teams is likely to be a focal point ...

  12. A Methodology to Measure Synergy Among Energy-Efficiency Programs at the Program Participant Level

    SciTech Connect (OSTI)

    Tonn, B.E.

    2003-11-14T23:59:59.000Z

    This paper presents a methodology designed to measure synergy among energy-efficiency programs at the program participant level (e.g., households, firms). Three different definitions of synergy are provided: strong, moderate, and weak. Data to measure synergy can be collected through simple survey questions. Straightforward mathematical techniques can be used to estimate the three types of synergy and explore relative synergistic impacts of different subsets of programs. Empirical research is needed to test the concepts and methods and to establish quantitative expectations about synergistic relationships among programs. The market for new energy-efficient motors is the context used to illustrate all the concepts and methods in this paper.

  13. Company Level Imports Archives

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    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 33 111 1,613 122 40Coal Stocks at CommercialDecadeReservesYear21Company Level Imports Company Level

  14. Improved freezing level retrieval

    E-Print Network [OSTI]

    Hong, Sungwook

    2002-01-01T23:59:59.000Z

    TRMM Microwave Imager(TMI)-based passive microwave retrieval techniques result in biased estimates of the freezing level and rainfall over the east Pacific in the Inter Tropical Convergence Zone (ITCZ). Passive microwave rainfall estimates...

  15. Sea level change

    SciTech Connect (OSTI)

    Meier, M.F. [Univ. of Colorado, Boulder, CO (United States)

    1996-12-31T23:59:59.000Z

    The IPCC (Intergovernmental Panel on Climate Change) 1995 Scientific Assessment, Chapter 7. Sea Level Change, presents a modest revision of the similar chapter in the 1990 Assessment. Principal conclusions on observed sea-level change and the principal terms in the sea-level equation (ocean thermal expansion, glaciers, ice sheets, and land hydrology), including our knowledge of the present-day (defined as the 20th Century) components of sea-level rise, and projections of these for the future, are presented here. Some of the interesting glaciological problems which are involved in these studies are discussed in more detail. The emphasis here is on trends over decades to a century, not on shorter variations nor on those of the geologic past. Unfortunately, some of the IPCC projections had not been agreed at the time of writing of this paper, and these projections will not be given here. 15 refs., 2 figs.

  16. Complexity analysis of pipeline mapping problems in distributed heterogeneous networks

    SciTech Connect (OSTI)

    Lin, Ying [University of Tennessee, Knoxville (UTK); Wu, Qishi [ORNL; Zhu, Mengxia [ORNL; Rao, Nageswara S [ORNL

    2009-04-01T23:59:59.000Z

    Largescale scientific applications require using various system resources to execute complex computing pipelines in distributed networks to support collaborative research. System resources are typically shared in the Internet or over dedicated connections based on their location, availability, capability, and capacity. Optimizing the network performance of computing pipelines in such distributed environments is critical to the success of these applications. We consider two types of largescale distributed applications: (1) interactive applications where a single dataset is sequentially processed along a pipeline; and (2) streaming applications where a series of datasets continuously flow through a pipeline. The computing pipelines of these applications consist of a number of modules executed in a linear order in network environments with heterogeneous resources under different constraints. Our goal is to find an efficient mapping scheme that allocates the modules of a pipeline to network nodes for minimum endtoend delay or maximum frame rate. We formulate the pipeline mappings in distributed environments as optimization problems and categorize them into six classes with different optimization goals and mapping constraints: (1) Minimum Endtoend Delay with No Node Reuse (MEDNNR), (2) Minimum Endtoend Delay with Contiguous Node Reuse (MEDCNR), (3) Minimum Endtoend Delay with Arbitrary Node Reuse (MEDANR), (4) Maximum Frame Rate with No Node Reuse or Share (MFRNNRS), (5) Maximum Frame Rate with Contiguous Node Reuse and Share (MFRCNRS), and (6) Maximum Frame Rate with Arbitrary Node Reuse and Share (MFRANRS). Here, 'contiguous node reuse' means that multiple contiguous modules along the pipeline may run on the same node and 'arbitrary node reuse' imposes no restriction on node reuse. Note that in interactive applications, a node can be reused but its resource is not shared. We prove that MEDANR is polynomially solvable and the rest are NP-complete. MEDANR, where either contiguous or noncontiguous modules in the pipeline can be mapped onto the same node, is essentially the Maximum n-hop Shortest Path problem, and can be solved using a dynamic programming method. In MEDNNR and MFRNNRS, any network node can be used only once, which requires selecting the same number of nodes for onetoone onto mapping. We show its NP-completeness by reducing from the Hamiltonian Path problem. Node reuse is allowed in MEDCNR, MFRCNRS and MFRANRS, which are similar to the Maximum n-hop Shortest Path problem that considers resource sharing. We prove their NP-completeness by reducing from the Disjoint-Connecting-Path Problem and Widest path with the Linear Capacity Constraints problem, respectively.

  17. IMPROVING CO2 EFFICIENCY FOR RECOVERING OIL IN HETEROGENEOUS RESERVOIRS

    SciTech Connect (OSTI)

    Reid B. Grigg

    2003-10-31T23:59:59.000Z

    The second annual report of ''Improving CO{sub 2} Efficiency for Recovery Oil in Heterogeneous Reservoirs'' presents results of laboratory studies with related analytical models for improved oil recovery. All studies have been undertaken with the intention to optimize utilization and extend the practice of CO{sub 2} flooding to a wider range of reservoirs. Many items presented in this report are applicable to other interest areas: e.g. gas injection and production, greenhouse gas sequestration, chemical flooding, reservoir damage, etc. Major areas of studies include reduction of CO{sub 2} mobility to improve conformance, determining and understanding injectivity changes in particular injectivity loses, and modeling process mechanisms determined in the first two areas. Interfacial tension (IFT) between a high-pressure, high-temperature CO{sub 2} and brine/surfactant and foam stability are used to assess and screen surfactant systems. In this work the effects of salinity, pressure, temperature, surfactant concentration, and the presence of oil on IFT and CO{sub 2} foam stability were determined on the surfactant (CD1045{trademark}). Temperature, pressure, and surfactant concentration effected both IFT and foam stability while oil destabilized the foam, but did not destroy it. Calcium lignosulfonate (CLS) can be used as a sacrificial and an enhancing agent. This work indicates that on Berea sandstone CLS concentration, brine salinity, and temperature are dominant affects on both adsorption and desorption and that adsorption is not totally reversible. Additionally, CLS adsorption was tested on five minerals common to oil reservoirs; it was found that CLS concentration, salinity, temperature, and mineral type had significant effects on adsorption. The adsorption density from most to least was: bentonite > kaolinite > dolomite > calcite > silica. This work demonstrates the extent of dissolution and precipitation from co-injection of CO{sub 2} and brine in limestone core. Metal tracers in the brine were used as markers to identify precipitation location and extent. This indicated possible causes of permanent permeability changes in the core and thus in a reservoir. Core segment porosity, permeability, chemical and back-scattered electron imaging, and chemical titrations were all used for qualitative and quantitative determination of compositional and injectivity changes. Also, injectivity effects of high flow rate near a wellbore and stress changes were shown on five different cores (two Berea sandstones, two Indiana limestones, and one Dakota sandstone).

  18. The effect of reservoir heterogeneity on gas production from hydrate accumulations in the permafrost

    SciTech Connect (OSTI)

    Reagan, M. T.; Kowalsky, M B.; Moridis, G. J.; Silpngarmlert, S.

    2010-05-01T23:59:59.000Z

    The quantity of hydrocarbon gases trapped in natural hydrate accumulations is enormous, leading to significant interest in the evaluation of their potential as an energy source. Large volumes of gas can be readily produced at high rates for long times from methane hydrate accumulations in the permafrost by means of depressurization-induced dissociation combined with conventional technologies and horizontal or vertical well configurations. Initial studies on the possibility of natural gas production from permafrost hydrates assumed homogeneity in intrinsic reservoir properties and in the initial condition of the hydrate-bearing layers (either due to the coarseness of the model or due to simplifications in the definition of the system). These results showed great promise for gas recovery from Class 1, 2, and 3 systems in the permafrost. This work examines the consequences of inevitable heterogeneity in intrinsic properties, such as in the porosity of the hydrate-bearing formation, or heterogeneity in the initial state of hydrate saturation. Heterogeneous configurations are generated through multiple methods: (1) through defining heterogeneous layers via existing well-log data, (2) through randomized initialization of reservoir properties and initial conditions, and (3) through the use of geostatistical methods to create heterogeneous fields that extrapolate from the limited data available from cores and well-log data. These extrapolations use available information and established geophysical methods to capture a range of deposit properties and hydrate configurations. The results show that some forms of heterogeneity, such as horizontal stratification, can assist in production of hydrate-derived gas. However, more heterogeneous structures can lead to complex physical behavior within the deposit and near the wellbore that may obstruct the flow of fluids to the well, necessitating revised production strategies. The need for fine discretization is crucial in all cases to capture dynamic behavior during production.

  19. SU-E-I-100: Heterogeneity Studying for Primary and Lymphoma Tumors by Using Multi-Scale Image Texture Analysis with PET-CT Images

    SciTech Connect (OSTI)

    Li, Dengwang [Shandong Normal University, Jinan, Shandong Province (China); Wang, Qinfen [Shandong Normal University, Jinan, Shandong (China); Li, H; Chen, J [Shandong Cancer Hospital and Institute, Jinan, Shandong (China)

    2014-06-01T23:59:59.000Z

    Purpose: The purpose of this research is studying tumor heterogeneity of the primary and lymphoma by using multi-scale texture analysis with PET-CT images, where the tumor heterogeneity is expressed by texture features. Methods: Datasets were collected from 12 lung cancer patients, and both of primary and lymphoma tumors were detected with all these patients. All patients underwent whole-body 18F-FDG PET/CT scan before treatment.The regions of interest (ROI) of primary and lymphoma tumor were contoured by experienced clinical doctors. Then the ROI of primary and lymphoma tumor is extracted automatically by using Matlab software. According to the geometry size of contour structure, the images of tumor are decomposed by multi-scale method.Wavelet transform was performed on ROI structures within images by L layers sampling, and then wavelet sub-bands which have the same size of the original image are obtained. The number of sub-bands is 3L+1.The gray level co-occurrence matrix (GLCM) is calculated within different sub-bands, thenenergy, inertia, correlation and gray in-homogeneity were extracted from GLCM.Finally, heterogeneity statistical analysis was studied for primary and lymphoma tumor using the texture features. Results: Energy, inertia, correlation and gray in-homogeneity are calculated with our experiments for heterogeneity statistical analysis.Energy for primary and lymphomatumor is equal with the same patient, while gray in-homogeneity and inertia of primaryare 2.59595±0.00855, 0.6439±0.0007 respectively. Gray in-homogeneity and inertia of lymphoma are 2.60115±0.00635, 0.64435±0.00055 respectively. The experiments showed that the volume of lymphoma is smaller than primary tumor, but thegray in-homogeneity and inertia were higher than primary tumor with the same patient, and the correlation with lymphoma tumors is zero, while the correlation with primary tumor isslightly strong. Conclusion: This studying showed that there were effective heterogeneity differences between primary and lymphoma tumor by multi-scale image texture analysis. This work is supported by National Natural Science Foundation of China (No. 61201441), Research Fund for Excellent Young and Middle-aged Scientists of Shandong Province (No. BS2012DX038), Project of Shandong Province Higher Educational Science and Technology Program (No. J12LN23), Jinan youth science and technology star (No.20120109)

  20. Heterogeneity-corrected vs -uncorrected critical structure maximum point doses in breast balloon brachytherapy

    SciTech Connect (OSTI)

    Kim, Leonard, E-mail: kimlh@umdnj.edu [Department of Radiation Oncology, Cancer Institute of New Jersey, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ (United States); Narra, Venkat; Yue, Ning [Department of Radiation Oncology, Cancer Institute of New Jersey, Robert Wood Johnson Medical School, University of Medicine and Dentistry of New Jersey, New Brunswick, NJ (United States)

    2013-07-01T23:59:59.000Z

    Recent studies have reported potentially clinically meaningful dose differences when heterogeneity correction is used in breast balloon brachytherapy. In this study, we report on the relationship between heterogeneity-corrected and -uncorrected doses for 2 commonly used plan evaluation metrics: maximum point dose to skin surface and maximum point dose to ribs. Maximum point doses to skin surface and ribs were calculated using TG-43 and Varian Acuros for 20 patients treated with breast balloon brachytherapy. The results were plotted against each other and fit with a zero-intercept line. Max skin dose (Acuros) = max skin dose (TG-43) ? 0.930 (R{sup 2} = 0.995). The average magnitude of difference from this relationship was 1.1% (max 2.8%). Max rib dose (Acuros) = max rib dose (TG-43) ? 0.955 (R{sup 2} = 0.9995). The average magnitude of difference from this relationship was 0.7% (max 1.6%). Heterogeneity-corrected maximum point doses to the skin surface and ribs were proportional to TG-43-calculated doses. The average deviation from proportionality was 1%. The proportional relationship suggests that a different metric other than maximum point dose may be needed to obtain a clinical advantage from heterogeneity correction. Alternatively, if maximum point dose continues to be used in recommended limits while incorporating heterogeneity correction, institutions without this capability may be able to accurately estimate these doses by use of a scaling factor.

  1. Structure and dynamics of colloidal depletion gels: coincidence of transitions and heterogeneity

    E-Print Network [OSTI]

    C. J. Dibble; M. Kogan; M. J. Solomon

    2006-06-06T23:59:59.000Z

    Transitions in structural heterogeneity of colloidal depletion gels formed through short-range attractive interactions are correlated with their dynamical arrest. The system is a density and refractive index matched suspension of 0.20 volume fraction poly(methyl methacyrlate) colloids with the non-adsorbing depletant polystyrene added at a size ratio of depletant to colloid of 0.043. As the strength of the short-range attractive interaction is increased, clusters become increasingly structurally heterogeneous, as characterized by number-density fluctuations, and dynamically immobilized, as characterized by the single-particle mean-squared displacement. The number of free colloids in the suspension also progressively declines. As an immobile cluster to gel transition is traversed, structural heterogeneity abruptly decreases. Simultaneously, the mean single-particle dynamics saturates at a localization length on the order of the short-range attractive potential range. Both immobile cluster and gel regimes show dynamical heterogeneity. Non-Gaussian distributions of single particle displacements reveal enhanced populations of dynamical trajectories localized on two different length scales. Similar dependencies of number density fluctuations, free particle number and dynamical length scales on the order of the range of short-range attraction suggests a collective structural origin of dynamic heterogeneity in colloidal gels.

  2. Ultrasonic liquid level detector

    DOE Patents [OSTI]

    Kotz, Dennis M. (North Augusta, SC); Hinz, William R. (Augusta, GA)

    2010-09-28T23:59:59.000Z

    An ultrasonic liquid level detector for use within a shielded container, the detector being tubular in shape with a chamber at its lower end into which liquid from in the container may enter and exit, the chamber having an ultrasonic transmitter and receiver in its top wall and a reflector plate or target as its bottom wall whereby when liquid fills the chamber a complete medium is then present through which an ultrasonic wave may be transmitted and reflected from the target thus signaling that the liquid is at chamber level.

  3. DATE SUBMITTED: GRADE LEVEL:

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

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  4. Effects of physical and geochemical heterogeneities on mineral transformation and biomass accumulation during uranium bioremediation at Rifle, Colorado

    E-Print Network [OSTI]

    Li, Li

    2010-01-01T23:59:59.000Z

    heterogeneity and bioremediation induced biogeochemicalduring uranium bioremediation at Rifle, Colorado. Environ.E.J.P. , 1992. Bioremediation of Uranium Contamination with

  5. IMPROVING CO2 EFFICIENCY FOR RECOVERING OIL IN HETEROGENEOUS RESERVOIRS

    SciTech Connect (OSTI)

    Reid B. Grigg; Robert K. Svec

    2002-12-20T23:59:59.000Z

    This document is the First Annual Report for the U.S. Department of Energy under contract No., a three-year contract entitled: ''Improving CO{sub 2} Efficiency for Recovering Oil in Heterogeneous Reservoirs.'' The research improved our knowledge and understanding of CO{sub 2} flooding and includes work in the areas of injectivity and mobility control. The bulk of this work has been performed by the New Mexico Petroleum Recovery Research Center, a research division of New Mexico Institute of Mining and Technology. This report covers the reporting period of September 28, 2001 and September 27, 2002. Injectivity continues to be a concern to the industry. During this period we have contacted most of the CO{sub 2} operators in the Permian Basin and talked again about their problems in this area. This report has a summary of what we found. It is a given that carbonate mineral dissolution and deposition occur in a formation in geologic time and are expected to some degree in carbon dioxide (CO{sub 2}) floods. Water-alternating-gas (WAG) core flood experiments conducted on limestone and dolomite core plugs confirm that these processes can occur over relatively short time periods (hours to days) and in close proximity to each other. Results from laboratory CO{sub 2}-brine flow experiments performed in rock core were used to calibrate a reactive transport simulator. The calibrated model is being used to estimate in situ effects of a range of possible sequestration options in depleted oil/gas reservoirs. The code applied in this study is a combination of the well known TOUGH2 simulator, for coupled groundwater/brine and heat flow, with the chemistry code TRANS for chemically reactive transport. Variability in response among rock types suggests that CO{sub 2} injection will induce ranges of transient and spatially dependent changes in intrinsic rock permeability and porosity. Determining the effect of matrix changes on CO{sub 2} mobility is crucial in evaluating the efficacy and potential environmental implications of storing CO{sub 2} in the subsurface. Chemical cost reductions are identified that are derived from the synergistic effects of cosurfactant systems using a good foaming agent and a less expensive poor foaming agent. The required good foaming agent is reduced by at least 75%. Also the effect on injectivity is reduced by as much as 50% using the cosurfactant system, compared to a previously used surfactant system. Mobility control of injected CO{sub 2} for improved oil recovery can be achieved with significant reduction in the chemical cost of SAG, improved injectivity of SAG, and improved economics of CO{sub 2} injection project when compared to reported systems. Our past work has identified a number of mobility control agents to use for CO{sub 2}-foam flooding. In particular the combination of the good foaming agent CD 1045 and a sacrificial agent and cosurfactant lignosulfonate. This work scrutinizes the methods that we are using to determine the efficiency of the sacrificial agents and cosurfactant systems. These have required concentration determinations and reusing core samples. Here, we report some of the problems that have been found and some interesting effects that must be considered.

  6. A dynamic fuel cycle analysis for a heterogeneous thorium-DUPIC recycle in CANDU reactors

    SciTech Connect (OSTI)

    Jeong, C. J.; Park, C. J.; Choi, H. [Korea Atomic Energy Research Inst., P.O. Box 150, Yuseong, Daejeon, 305-600 (Korea, Republic of)

    2006-07-01T23:59:59.000Z

    A heterogeneous thorium fuel recycle scenario in a Canada deuterium uranium (CANDU) reactor has been analyzed by the dynamic analysis method. The thorium recycling is performed through a dry process which has a strong proliferation resistance. In the fuel cycle model, the existing nuclear power plant construction plan was considered up to 2016, while the nuclear demand growth rate from the year 2016 was assumed to be 0%. In this analysis, the spent fuel inventory as well as the amount of plutonium, minor actinides, and fission products of a multiple thorium recycling fuel cycle were estimated and compared to those of the once-through fuel cycle. The analysis results have shown that the heterogeneous thorium fuel cycle can be constructed through the dry process technology. It is also shown that the heterogeneous thorium fuel cycle can reduce the spent fuel inventory and save on the natural uranium resources when compared with the once-through cycle. (authors)

  7. Fracture permeability and seismic wave scattering--Poroelastic linear-slip interface model for heterogeneous fractures

    SciTech Connect (OSTI)

    Nakagawa, S.; Myer, L.R.

    2009-06-15T23:59:59.000Z

    Schoenberg's Linear-slip Interface (LSI) model for single, compliant, viscoelastic fractures has been extended to poroelastic fractures for predicting seismic wave scattering. However, this extended model results in no impact of the in-plane fracture permeability on the scattering. Recently, we proposed a variant of the LSI model considering the heterogeneity in the in-plane fracture properties. This modified model considers wave-induced, fracture-parallel fluid flow induced by passing seismic waves. The research discussed in this paper applies this new LSI model to heterogeneous fractures to examine when and how the permeability of a fracture is reflected in the scattering of seismic waves. From numerical simulations, we conclude that the heterogeneity in the fracture properties is essential for the scattering of seismic waves to be sensitive to the permeability of a fracture.

  8. Correlating Spatial Heterogeneities in Porosity and Permeability with Metal

    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 for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management Fermi Site Office (FSO)Corporate

  9. A hierarchical framework for the multiscale modeling of microstructure evolution in heterogeneous materials.

    SciTech Connect (OSTI)

    Luscher, Darby J.

    2010-04-01T23:59:59.000Z

    All materials are heterogeneous at various scales of observation. The influence of material heterogeneity on nonuniform response and microstructure evolution can have profound impact on continuum thermomechanical response at macroscopic “engineering” scales. In many cases, it is necessary to treat this behavior as a multiscale process thus integrating the physical understanding of material behavior at various physical (length and time) scales in order to more accurately predict the thermomechanical response of materials as their microstructure evolves. The intent of the dissertation is to provide a formal framework for multiscale hierarchical homogenization to be used in developing constitutive models.

  10. Spatial and Geochemical Spatial and Geochemical Heterogeneity Impacts on Iron Biomineralization and Uranium Sequestration

    SciTech Connect (OSTI)

    Scott Fendorf; Shawn Benner; Jim Neiss; Colleen Hansel; Peter Nico; Chris Francis; Phil Jardine

    2004-03-17T23:59:59.000Z

    Bioreductive transformations of iron (hydr)oxides are a critically important processes controlling the fate and transport of contaminants in soil and aquifer systems. Heterogeneity arising from both chemical and physical conditions will lead to various biomineralization products of iron oxides and will additionally alter reactions controlling the partitioning of hazardous elements such as uranium. We are presently exploring chemical and mineralogical transformations within physically complex material having a range of pore-size distribution and chemical environments. Here we discuss the impact of calcium on the reactive transport of uranium and the spatial heterogeneity in iron hydroxide mineralization and concomitant uranium reduction along a diffusive flow path.

  11. Flory-Huggins theory for the solubility of heterogeneously-modified polymers

    E-Print Network [OSTI]

    Patrick B. Warren

    2007-04-05T23:59:59.000Z

    Many water soluble polymers are chemically modified versions of insoluble base materials such as cellulose. A Flory-Huggins model is solved to determine the effects of heterogeneity in modification on the solubility of such polymers. It is found that heterogeneity leads to decreased solubility, with the effect increasing with increasing blockiness. In the limit of extreme blockiness, the nature of the phase coexistence crosses over to a polymer-polymer demixing transition. Some consequences are discussed for the synthesis of partially modified polymers, and the experimental characterisation of such systems.

  12. What can I do with this graduate degree? Corporate office summer clerkships and entry level positions

    E-Print Network [OSTI]

    Rock, Chris

    and litigate sooner; experience gained here can be valuable to private firms later. Governmentworkoffersavarietyofpracticeopportunities from criminal to contracts. INFORMATION/STRATEGIESAREAS EMPLOYERS CORPORATEPRACTICE Trade and professional associations Political Action Committees Law firms Public interest advocacy

  13. Designing for Heterogeneity and Unreliability: Examples from Adaptive Mesh

    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 for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management FermiDavid Turner David3Depth ProfilefromRefinement |

  14. Understanding and Tailoring Metal-Support Interactions in Heterogeneous

    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:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron Spin TransitionProgramUndergraduate MonthlyDecoupling PamelaCatalysts |

  15. LDRD final report : mesoscale modeling of dynamic loading of heterogeneous

    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 PowerCherries 82981-1cnHigh SchoolIn12electron 9 5 - -/e),,s - 1 2 3 4 5 6 7 8 9 104materials. |

  16. Runtime Adaptation for Autonomic Heterogeneous Computing | ornl.gov

    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 Scienceand Requirements RecentlyElectronicResourcesjobs Running jobs QuickRunning on

  17. Heterogeneous Catalyst for Improved Selectivity of Biomass-Derived

    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 PowerCherries 82981-1cn SunnybankD.jpgHanfordDepartment ofHeatHenry Hurwitz,Hermann Muller

  18. Textured Metal Catalysts for Heterogeneous Catalysis - Energy Innovation

    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:Energy: Grid Integration Redefining What'sis Taking Over Our InstagramStructureProposedPAGESafetyTed Donat AboutTextiles (2010 MECS)

  19. The Effect of Surface Heterogeneity on Cloud Absorption Estimates

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

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  20. The Role of Catalyst Surface Structure in Heterogeneous Catalysis |

    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 ScienceandMesa del SolStrengthening a solidSynthesis of 2Dand WaterThe FutureRisk Assessments

  1. Practical Experience in the Dangers of Heterogeneous L. S. Blackford, A. Clearyy, J. Demmelz, I. Dhillonz, J. Dongarrax,

    E-Print Network [OSTI]

    Dongarra, Jack

    Abstract Special challenges exist in writing reliable numerical library software for heteroge- neous. This paper addresses the issue of writing reliable numerical software for networks of heterogeneous computers,or if that is not possible, recommend that the software is not used on heterogeneous networks. 1 Introduction

  2. The seamless provisioning of services and applications across heterogeneous wireless systems will play a key role in

    E-Print Network [OSTI]

    Havinga, Paul J.M.

    is scalable, is able to use the available resources efficiently (like network, energy, and money), and makes for seamless provision of mobile services over heterogeneous wireless networks. The SMART architecture the heterogeneous network transparent to, but nevertheless under control of the user. User-friendliness, security

  3. Combustion, Explosion, and Shock Waves, Vol. 46, No. 3, pp. , 2010 Combustion of Heterogeneous Nanostructural Systems (Review)

    E-Print Network [OSTI]

    Mukasyan, Alexander

    Combustion, Explosion, and Shock Waves, Vol. 46, No. 3, pp. ­, 2010 Combustion of Heterogeneous submitted November 26, 2009. The current status of research in the field of combustion of heterogeneous mechanisms of combustion in such systems and prospects of their further applications are discussed. Key words

  4. Mineralogical heterogeneities in the Earth's mantle: Constraints from Mn, Co, Ni and Zn partitioning during partial melting

    E-Print Network [OSTI]

    Lee, Cin-Ty Aeolus

    Mineralogical heterogeneities in the Earth's mantle: Constraints from Mn, Co, Ni and Zn online 1 June 2011 Editor: L. Stixrude Keywords: transition metals mineralogical heterogeneities are sensitive to changes in mineralogy or major element composition, and thus, are promising to trace

  5. Thetis: A real-time Multi-Vehicles Hybrid Simulator for Heterogeneous Olivier Parodi, Lionel Lapierre, Bruno Jouvencel

    E-Print Network [OSTI]

    Boyer, Edmond

    Thetis: A real-time Multi-Vehicles Hybrid Simulator for Heterogeneous Vehicles Olivier Parodi is to present Thetis: a real-time multi-vehicles hybrid simulator for heterogeneous vehicles. This simulator, the vehicles, sensors and communication simulators and, of course, the actual embedded controller which

  6. Abstract--In the control of heterogeneous unmanned vehicles in future military operations, it will be critical to provide goal-

    E-Print Network [OSTI]

    Cummings, Mary "Missy"

    of unmanned underwater and aerial vehicles, which included the automatic target recognition acknowledgement1 Abstract-- In the control of heterogeneous unmanned vehicles in future military operations heterogeneous unmanned vehicles (UVs). The DCDT was applied to several decision making processes involving a mix

  7. Level: National Data;

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    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 33 111 1,613 122 40Coal StocksProved Reserves (Billion Cubic Feet)Wellhead0 Capability to.5 First

  8. Company Level Imports

    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 for4,645 3,625govInstrumentstdmadapInactiveVisiting theCommercialization and Innovation2010 2010 EIA-28 Financial

  9. Level Diagram Format Choice

    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 PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us count the ways. We've13, 2009 InFormWhich

  10. Tables of Energy Levels

    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 ScienceandMesa del SolStrengthening a solidSynthesis of 2D Alloys &8-5070P3. U.S.7.

  11. Simulating the Heterogeneity in Braided Channel Belt Deposits: 2. Examples of Results and Comparison to Natural Deposits

    SciTech Connect (OSTI)

    Guin, Arijit; Ramanathan, Ramya; Ritzi, Robert W.; Dominic, David F.; Lunt, Ian A.; Scheibe, Timothy D.; Freedman, Vicky L.

    2010-04-29T23:59:59.000Z

    In Part 1 of this series we presented a methodology and a code for modeling the hierarchical sedimentary architecture in braided channel belt deposits. Here, in Part 2, the code was used to create a digital model of this architecture, and the corresponding spatial distribution of permeability. The simulated architecture was compared to the real stratal architecture observed in an abandoned channel belt of the Sagavanirktok River, Alaska by Lunt et al. (2004). The comparisons included assessments of similarity which were both qualitative and quantitative. From the qualitative comparisons we conclude that a synthetic deposit created by the code has unit types, at each level, with a geometry which is generally consistent with the geometry of unit types observed in the field. The digital unit types would generally be recognized as representing their counterparts in nature, including cross stratasets, lobate and scroll bar deposits, channel fills, etc. Furthermore, the synthetic deposit has a hierarchical spatial relationship among these units which represents how the unit types are observed in field exposures and in geophysical images. In quantitative comparisons the proportions and the length, width, and height of unit types at different scales, across all levels of the stratal hierarchy compare well between the digital and the natural deposits. A number of important attributes of the channel belt model were shown to be influenced by more than one level within the hierarchy of stratal architecture. First, the high-permeability open-framework gravels percolated at all levels and thus formed preferential flow pathways. Open framework gravels are indeed known to form preferential flow pathways in natural channel belt deposits. The nature of a percolating cluster changed across different levels of the hierarchy of stratal architecture. As a result of this geologic structure, the percolation occurs at proportions of open-framework gravels below the theoretical percolation threshold for random infinite media. Second, when the channel belt model was populated with permeability distributions by lowest-level unit type, the composite permeability semivariogram contained structures that were identifiable at more than one scale, and each of these structures could be directly linked to unit types of different scales existing at different levels within the hierarchy of strata. These collective results are encouraging with respect to our goal that this model be relevant as a base case in future studies for testing ideas in research addressing the upscaling problem in aquifers and reservoirs with multi-scale heterogeneity.

  12. Design Considerations for a Heterogeneous Network of Bearings-only Sensors using Sensor Management

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    Cevher, Volkan

    College Park, MD 20742 Abstract--This paper presents the design characterization of a heterogeneous sensor data with other nodes, a microprocessor to process and fuse data into information and a battery and replenish batteries. Therefore, the nodes must operate under severe energy constraints to maintain a long

  13. Intra-tumor heterogeneity on baseline 18 F-FDG PET images

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Intra-tumor heterogeneity on baseline 18 F-FDG PET images characterized by textural features 4. INSERM, U613, Faculty of Medicine, Brest F-29200, France Keywords: 18 F-FDG PET, esophageal(0)298018124 Email: florent.tixier@etudiant.univ-brest.fr Short running title: PET texture analysis predicts response

  14. Electromagnetic Induction by Sq Ionospheric Currents in a Heterogeneous Earth: Modeling

    E-Print Network [OSTI]

    Velímsky, Jakub

    Electromagnetic Induction by Sq Ionospheric Currents in a Heterogeneous Earth: Modeling Using Ground-based and Satellite Measurements Jakub Vel´imsk´y and Mark E. Everett Department of Geology of hourly means of the geomagnetic field components observed on quiet days in years 2001­2002 on ground

  15. COMPASS Latency Optimal Routing in Heterogeneous Chord-based P2P Systems

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    Vetter, Thomas

    COMPASS ­ Latency Optimal Routing in Heterogeneous Chord-based P2P Systems Lukas Probst Nenad. In this report, we present COMPASS, a protocol for efficient data access in het- erogeneous mobile Chord-based P2P systems. COMPASS takes into ac- count that the network latencies of nodes in a mobile P2P network

  16. Numerical Modelling of Unsaturated Flow in Uniform and Heterogeneous Waste Rock Piles

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    Aubertin, Michel

    Numerical Modelling of Unsaturated Flow in Uniform and Heterogeneous Waste Rock Piles O Fala1 , M Aubertin1,3 , J Molson1 , B Bussière2,3 , G W Wilson4 , R Chapuis1 and V Martin1 ABSTRACT Waste rock piles these piles, many physical, geochemical and biological processes can contribute to the production of AMD

  17. Control Methodologies for a Heterogeneous Group of Untethered Magnetic Micro-Robots

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    Sitti, Metin

    investigate Mag-µBots that are geometrically and magnetically designed to respond uniquely to the same input magnetic fields. Designs include: (1) ge- ometrically similar Mag-µBots with different values of magControl Methodologies for a Heterogeneous Group of Untethered Magnetic Micro-Robots Steven Floyd

  18. A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid

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    Diaconescu, Ada

    A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid Sylvain Frey proposes a holonic control architecture to help meet these requirements. We show how this architecture can that the proposed architecture can facilitate the development of control solutions addressing the aforementioned

  19. UNIVERSITY OF CHICAGO TOPOLOGY AND HETEROGENEITY AT THE RATE-LIMITING STEP

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    Sosnick, Tobin R.

    UNIVERSITY OF CHICAGO TOPOLOGY AND HETEROGENEITY AT THE RATE-LIMITING STEP OF THE PROTEIN FOLDING .......................................................................... 2 1.3 Physical processes in protein folding...................................................... 5 of the rate-limiting step in protein folding ...................... 11 1.4.1 Two-state mechanisms and TS

  20. A Self-Organizing Heuristic for Building Optimal Heterogeneous Ad-Hoc Sensor Networks

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    Minai, Ali A.

    with equal power, which means that they all have the same transmission radius. Such homoge- neous networks-making about transmission power. However, in sufficiently dense networks (or in networks with significant amount of work on heterogeneous networks, mainly due to their flexibility and better fit into potential