National Library of Energy BETA

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

    2006-01-01

    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. Molecular-level Design of Heterogeneous Chiral Catalysts

    SciTech Connect (OSTI)

    Gellman, Andrew John; Sholl, David S.; Tysoe, Wilfred T.; Zaera, Francisco

    2013-04-28

    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.

  5. Molecular-Level Design of Heterogeneous Chiral Catalysis

    SciTech Connect (OSTI)

    Francisco Zaera

    2012-03-21

    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.

  6. 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

  7. 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-shale and has enormous potential to meet global energy requirements, yet a detailed sedimentological Formation is obvious. Yet, sedimentology of the oil-shale bearing units of the Green River Formation

  8. Influence of relative sea level on facies, stacking patterns and reservoir heterogeneity: Middle Jurassic Brent group, UK North Sea

    SciTech Connect (OSTI)

    Jennette, D.C. (Exxon Production Research Co., Houston, TX (United States))

    1996-01-01

    The lower Brent Group, above the genetically distinct lowstand deposits of the Broom Formation, is a progradational sequence set made up of the lower- shoreface Rannoch, the upper-shoreface and beach-plain Etive, and the back-barrier Lower Ness Formations. Much of the reservoir heterogeneity in this sandstone-rich succession can be attributed to facies and stacking-pattern variations within higher frequency systems tracts. Highstand systems tracts have strongly offlapping progradational geometries. Sweep efficiency is influenced by: (1) seaward-dipping, mica-rich bed-sets; (2) high-quality ebb tidal-delta sandstone bodies; and (3) the sharp increase in reservoir quality at the sub-horizontal base of the upper shoreface. The increased permeability leads water in the Etive to overrun oil in the Rannoch. Horizontal wells are targeting unswept reserves in the lower-permeability facies. Relative falls in sea level punctuated highstand progradation and led to the subaerial erosion of the Etive and Rannoch formations. Lowstand deposits are contained within incised valleys and consist of fluvial sandstones, coastal-plain mudstones and coal. Well-performance anomalies and abrupt variations in sandstone thickness are associated with the heterogeneous valley-fills. Shoreface sedimentation resumed during transgressive systems tracts. High sediment flux enabled the nearshore system to stack aggradationally. Diachronous lithostratigraphy, aggradation of the heterolithic back-barrier Ness Formation, interbedding of Rannoch facies in the lower Etive and increased carbonate cement in the lower shoreface Rannoch mark this systems tract.

  9. Influence of relative sea level on facies, stacking patterns and reservoir heterogeneity: Middle Jurassic Brent group, UK North Sea

    SciTech Connect (OSTI)

    Jennette, D.C. [Exxon Production Research Co., Houston, TX (United States)

    1996-12-31

    The lower Brent Group, above the genetically distinct lowstand deposits of the Broom Formation, is a progradational sequence set made up of the lower- shoreface Rannoch, the upper-shoreface and beach-plain Etive, and the back-barrier Lower Ness Formations. Much of the reservoir heterogeneity in this sandstone-rich succession can be attributed to facies and stacking-pattern variations within higher frequency systems tracts. Highstand systems tracts have strongly offlapping progradational geometries. Sweep efficiency is influenced by: (1) seaward-dipping, mica-rich bed-sets; (2) high-quality ebb tidal-delta sandstone bodies; and (3) the sharp increase in reservoir quality at the sub-horizontal base of the upper shoreface. The increased permeability leads water in the Etive to overrun oil in the Rannoch. Horizontal wells are targeting unswept reserves in the lower-permeability facies. Relative falls in sea level punctuated highstand progradation and led to the subaerial erosion of the Etive and Rannoch formations. Lowstand deposits are contained within incised valleys and consist of fluvial sandstones, coastal-plain mudstones and coal. Well-performance anomalies and abrupt variations in sandstone thickness are associated with the heterogeneous valley-fills. Shoreface sedimentation resumed during transgressive systems tracts. High sediment flux enabled the nearshore system to stack aggradationally. Diachronous lithostratigraphy, aggradation of the heterolithic back-barrier Ness Formation, interbedding of Rannoch facies in the lower Etive and increased carbonate cement in the lower shoreface Rannoch mark this systems tract.

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

    E-Print Network [OSTI]

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

    2015-02-05

    mechanisms. • Phenotypic diversity can implement population level functions. Much of our knowledge of microbial life is only a description of average population behaviours, but modern technologies provide a more inclusive view and reveal that microbes...

  11. Essays on taxation and firm behavior

    E-Print Network [OSTI]

    Rao, Nirupama S

    2010-01-01

    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 ...

  12. The growth of business firms: Theoretical framework and empirical evidence

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Pg(g) of business-firm growth rates. The model pre- dicts that Pg(g) is exponential in the central rate at all levels of aggregation studied. The Theoretical Framework We model business firms as classesThe growth of business firms: Theoretical framework and empirical evidence Dongfeng Fu* , Fabio

  13. 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

  14. Industry Dynamics: Foundations For Models with an Infinite Number of Firms

    E-Print Network [OSTI]

    Van Roy, Ben

    Industry Dynamics: Foundations For Models with an Infinite Number of Firms Gabriel Y. Weintraub August, 2010 Abstract This paper explores the connection between three important threads of economic research offering different approaches to studying the dynamics of an industry with heterogeneous firms

  15. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-Rich Matrices inPrincipalFirm Exchange . . . . . . . . . . . .

  16. Where do firms manage earnings?

    E-Print Network [OSTI]

    Dyreng, Scott D.

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

  17. Correlations in firm default behavior

    E-Print Network [OSTI]

    Thirukkonda, Sreeram (Sreeram Radhakrishnan), 1975-

    2009-01-01

    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. EPC Firms Expand Their Role 

    E-Print Network [OSTI]

    Hernandez, L. A. Jr.

    1990-01-01

    -owned electric utilities themselves. The bulk of U.S. base-load fossil, nuclear and hydro power plants were built by major firms such as Bechtel Power, Stone & Webster Enginnering Corp., Ebasco and others. Most of these projects were in the 500-1,000 MW... failed to materialize', many EPC companies started working with independent developers as an alternative to their traditional market. The strategy of several EPC firms - Hawker Siddeley Power Engineering Company of Houston, Texas, for example...

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

    E-Print Network [OSTI]

    Liao, Xiongjiu

    2011-01-01

    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, ...

  20. Knowledge Management Capabilities of Lead Firms in Innovation Ecosystems

    E-Print Network [OSTI]

    Velu, Chander

    2015-01-01

    , and the symbiotic nature of relationships between the firm and its external stakeholders (Moore 2006) and the firm as resource integrator (Vargo and Lusch 2004). Firms such as Apple and Facebook have offered recent potent examples of innovation ecosystem...

  1. Empirical essays on firm behavior in India

    E-Print Network [OSTI]

    Ryan, Nicholas (Nicholas James)

    2012-01-01

    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 ...

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

    E-Print Network [OSTI]

    Vadakkepatt, Gautham Gopal

    2011-10-21

    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...

  3. Tomographic Characterization of Aquifer Heterogeneity

    E-Print Network [OSTI]

    Lyle, Shane

    2011-05-31

    ............................................................................................................................................ 26 Pumped Hydraulic Source – Monitoring Wells .................................................................................. 27 Pneumatic Source – Geoprobe... ......................................................................................................................................................... 96 Lateral Heterogeneity – Pumped Hydraulic CPT Source........................................................................ 97 Lateral Heterogeneity – Pneumatic CPT Source...

  4. A Consistent Firm Objective When Markets are Incomplete: Profit Maximization

    E-Print Network [OSTI]

    Sabarwal, Tarun

    2004-08-11

    Markets are Incomplete: Profit Maximization Abstract In economies with private firm ownership, when markets are incomplete, and firm sharehold- ers change over time, there is no broad agreement on what ought to be a firm’s objective. It is shown that ex...-post, profit maximization is consistent with shareholder preferences in such economies; that is, along the equilibrium path, in every period and state of the world, every coalition of a firm’s shareholders in that period and state approves a profit...

  5. Surface Characterization of Heterogeneous Catalysts Using Low Energy Ion Scattering Spectroscopy Combined with Electrochemistry 

    E-Print Network [OSTI]

    Axnanda, Stephanus R.

    2010-07-14

    Fundamental studies of heterogeneous catalysis were performed and presented in this dissertation to gain a better understanding of heterogeneous catalytic reactions at a molecular level. Surface science techniques were ...

  6. Non-traditional growth in large, established firms

    E-Print Network [OSTI]

    Sunderrajan, Suresh, 1970-

    2004-01-01

    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 ...

  7. The impact of financial incentives on firm behavior

    E-Print Network [OSTI]

    Matsa, David

    2006-01-01

    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. ...

  8. Fact Sheet: Wind Firming EnergyFarm (August 2013) | Department...

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

    Wind Firming EnergyFarm (August 2013) Fact Sheet: Wind Firming EnergyFarm (August 2013) Primus Power is deploying a 25 MW75 MWh EnergyFarm(TM) in California's Central Valley,...

  9. Bankruptcy Control and the Theory of the Firm

    E-Print Network [OSTI]

    Muro, Sergio A.

    2008-01-01

    Bankruptcy Control and the Theory of the Firm Sergio A. Muromy own. Bankruptcy Control and the Theory of the Firm I.integrates organization theory, control and biology, see

  10. Acquiring firm long-term performance and governance characteristics 

    E-Print Network [OSTI]

    Breazeale, Jonathan Paul

    2004-09-30

    I examine the market reaction to merger announcements and the long-term post-merger stock price performance of newly merged firms. For a sample of 484 acquiring firms completing mergers between 1993 and 2000, the average ...

  11. Start-up manufacturing firms: operations for survival 

    E-Print Network [OSTI]

    Liu, Kuangyi

    2009-11-25

    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 ...

  12. A political theory of the firm : why ownership matters

    E-Print Network [OSTI]

    Clark Muntean, Susan

    2009-01-01

    stock options—and equity buyouts suggest a weaker schismheld private equity and buyout firms. Venture capital is anprivate equity (e.g. hedge funds, buyout firms) is an over-

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

    E-Print Network [OSTI]

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

    2015-01-01

    failure as firms plan and execute their own growth in developed markets (Elango and Patnaik 2007). For example, firms can learn how to leverage the existing relationships of network members to gain knowledge about developed-market customers and suppliers...

  14. Fast Talking: CEOs, Verbal Intelligence, and Firm Value

    E-Print Network [OSTI]

    Chen, Yiling

    their firms. Kaplan et al. (2008) find that CEO abilities are linked to company success in buyout and venture

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

    E-Print Network [OSTI]

    Plouffe, Michael

    through the congressional testimony of the NationalRelying on congressional testimony, I find significant

  16. Exporting licensing regulations affecting US geothermal firms

    SciTech Connect (OSTI)

    Not Available

    1988-08-01

    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.

  17. Analysis of Firm Transportation Contracts: Results and Methodology

    Reports and Publications (EIA)

    1996-01-01

    Summary of Federal Energy Regulatory Commission (FERC) Index of Customers Data - Firm Transportation Capacity Under Contract as of April 1, 1996.

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

    E-Print Network [OSTI]

    Lee, Sungbok

    2012-02-14

    This dissertation investigates the relationship of competition and firms' price responses, by analyzing: i) whether new entry reduces price discrimination, ii) when incumbents reduce price discrimination preemptively in ...

  19. 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...

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

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

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

  1. Do IPO Charters Maximize Firm Value? Antitakeover Protection in IPOs

    E-Print Network [OSTI]

    Daines, Robert; Klausner, Michael

    1999-01-01

    capitalists and leveraged buyout specialists -- presumablyb) those in which leveraged buyout specialists had investedofferings by major leveraged buyout funds (52 firms). We

  2. Venture capital returns, new firms and social networks

    E-Print Network [OSTI]

    Ewens, Michael

    2010-01-01

    firms . . . . . . . . 2.7 Cabral and Wang (2009) . . . . .spinoff formation model of Cabral and Wang (2009), high typespinoff formation model of Cabral and Wang (2009), high type

  3. A Longitudinal Analysis of the Impact of Firm Resources and Industry Characteristics on Firm-Specific Profitability

    E-Print Network [OSTI]

    Acquaah, Moses; Chi, Tailan

    2007-01-01

    moderating effects of industry characteristics on this relationship. We find that firm-specific resources enhance both accounting-based measures (return on assets and return on sales) and market-based measure (Tobin’s q) of firm-specific performance. Moreover...

  4. The influence of institutional investors on firm value

    E-Print Network [OSTI]

    Lee, Yong Seung

    2013-01-01

    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 ...

  5. Coverage of Independent Audits of For-Profit Firms

    Energy Savers [EERE]

    of a firm's financial statements? What are the objectives of the audit? What is the source of the requirement for the audit? What should the IPA do if he or she finds that the...

  6. Introduction of Chicago-based Architectural Firms Workshop, 2012 Fall

    E-Print Network [OSTI]

    Heller, Barbara

    Open Space Townhouse Urbanism #12; · Size of Firm: 200 Employees · Focus area: Energy-efficient & sustainable architecture, Master plan Office : Chicago 30 West Monroe Suite 700, Chicago IL 60603 · Focus area: Architecture, Urban Design

  7. INNOVATIVE CAPABILITIES, OPERATIONS PRIORITIES AND CORPORATE PERFORMANCE IN MANUFACTURING FIRMS

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    , Turkey 3 Faculty of Management, Gebze Institute of Technology, Kocaeli, Turkey ABSTRACT The purposeINNOVATIVE CAPABILITIES, OPERATIONS PRIORITIES AND CORPORATE PERFORMANCE IN MANUFACTURING FIRMS Management, Kocaeli, Turkey 2 Faculty of Engineering and Natural Sciences, Sabanci University, Istanbul

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

    E-Print Network [OSTI]

    Kojima, Masashi, 1968-

    2004-01-01

    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 ...

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

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

    Research Institute (EPRI). The EnergyFarm will displace a planned 73 million natural-gas-fired power plant intended to smooth (or firm) the output of intermittent wind and...

  10. Application of lean enterprise concept to construction firms in Japan

    E-Print Network [OSTI]

    Taguchi, Hiroshi, 1973-

    2004-01-01

    Construction firms in Japan are struggling with the change in construction industry environment and need a new business model to meet the change. On the other hand, Japanese manufacturing companies, especially automobile ...

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

    E-Print Network [OSTI]

    Eifert, Benjamin Patrick

    2010-01-01

    diffusion. 2.2 Electricity in developing countries The ideveloping countries – one external to the firm in source, electricityDeveloping and transition countries now have some s ubstantial e xperience w ith electricity

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

    E-Print Network [OSTI]

    Wellhausen, Rachel L. (Rachel Louise)

    2012-01-01

    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 ...

  13. The Geography of European Convertible Bonds: Why Firms Issue Convertibles?

    E-Print Network [OSTI]

    Saskatchewan, University of

    1 The Geography of European Convertible Bonds: Why Firms Issue Convertibles? Franck Bancel Usha R at the geography of CB issuance. The size and development of the CB market varies widely across countries and over

  14. A political theory of the firm : why ownership matters

    E-Print Network [OSTI]

    Clark Muntean, Susan

    2009-01-01

    s Largest Private Companies, Family Business America’s 150firms or holding companies and their family members haveloyal to both the company and the family. The management and

  15. Regulatory compliance and air quality permitting: Why do firms overcomply?

    E-Print Network [OSTI]

    DeHart-Davis, Leisha; Bozeman, Barry

    2001-10-01

    Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Regulatory compliance and air quality permitting: Why do firms overcomply? Leisha DeHart-Davis; Barry Bozeman Journal of Public Administration...Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Regulatory compliance and air quality permitting: Why do firms overcomply? Leisha DeHart-Davis; Barry Bozeman Journal of Public Administration...

  16. 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 ...

  17. 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

    2009-05-15

    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, ...

  18. Reaction Selectivity in Heterogeneous Catalysis

    SciTech Connect (OSTI)

    Somorjai, Gabor A.; Kliewer, Christopher J.

    2009-02-02

    The understanding of selectivity in heterogeneous catalysis is of paramount importance to our society today. In this review we outline the current state of the art in research on selectivity in heterogeneous catalysis. Current in-situ surface science techniques have revealed several important features of catalytic selectivity. Sum frequency generation vibrational spectroscopy has shown us the importance of understanding the reaction intermediates and mechanism of a heterogeneous reaction, and can readily yield information as to the effect of temperature, pressure, catalyst geometry, surface promoters, and catalyst composition on the reaction mechanism. DFT calculations are quickly approaching the ability to assist in the interpretation of observed surface spectra, thereby making surface spectroscopy an even more powerful tool. HP-STM has revealed three vitally important parameters in heterogeneous selectivity: adsorbate mobility, catalyst mobility, and selective site-blocking. The development of size controlled nanoparticles from 0.8 to 10 nm, of controlled shape, and of controlled bimetallic composition has revealed several important variables for catalytic selectivity. Lastly, DFT calculations may be paving the way to guiding the composition choice for multi-metallic heterogeneous catalysis for the intelligent design of catalysts incorporating the many factors of selectivity we have learned.

  19. Data Collection and Restoration for Heterogeneous Process Migration *

    E-Print Network [OSTI]

    Sun, Xian-He

    Data Collection and Restoration for Heterogeneous Process Migration * Kasidit Chanchio Xian-He Sun,sung@cs.iit.edu Abstract This study presents a practical solution for data collec- tion and restoration to migrate- grams. Experimental and analytical results show that (1) a user-level process can be migrated across

  20. Renewal-anomalous-heterogeneous files

    E-Print Network [OSTI]

    Ophir Flomenbom

    2010-08-13

    Renewal-anomalous-heterogeneous files are solved. A simple file is made of Brownian hard spheres that diffuse stochastically in an effective 1D channel. Generally, Brownian files are heterogeneous: the spheres' diffusion coefficients are distributed and the initial spheres' density is non-uniform. In renewal-anomalous files, the distribution of waiting times for individual jumps is exponential as in Brownian files, yet obeys: {\\psi}_{\\alpha} (t)~t^(-1-{\\alpha}), 0renewal as all the particles attempt to jump at the same time. It is shown that the mean square displacement (MSD) in a renewal-anomalous-heterogeneous file, , obeys, ~[_{nrml}]^{\\alpha}, where _{nrml} is the MSD in the corresponding Brownian file. This scaling is an outcome of an exact relation (derived here) connecting probability density functions of Brownian files and renewal-anomalous files. It is also shown that non-renewal-anomalous files are slower than the corresponding renewal ones.

  1. State-of-the-art in Heterogeneous Computing

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

    Brodtkorb, Andre R.; Dyken, Christopher; Hagen, Trond R.; Hjelmervik, Jon M.; Storaasli, Olaf O.

    2010-01-01

    Node level heterogeneous architectures have become attractive during the last decade for several reasons: compared to traditional symmetric CPUs, they offer high peak performance and are energy and/or cost efficient. With the increase of fine-grained parallelism in high-performance computing, as well as the introduction of parallelism in workstations, there is an acute need for a good overview and understanding of these architectures. We give an overview of the state-of-the-art in heterogeneous computing, focusing on three commonly found architectures: the Cell Broadband Engine Architecture, graphics processing units (GPUs), and field programmable gate arrays (FPGAs). We present a review of hardware, availablemore »software tools, and an overview of state-of-the-art techniques and algorithms. Furthermore, we present a qualitative and quantitative comparison of the architectures, and give our view on the future of heterogeneous computing.« less

  2. Variational Asymptotic Micromechanics Modeling of Heterogeneous Piezoelectric

    E-Print Network [OSTI]

    Yu, Wenbin

    piezoelectric materials are usually a better technical solution in the case of many applications such 1Variational Asymptotic Micromechanics Modeling of Heterogeneous Piezoelectric Materials Tian Tang properties and local fields of heterogeneous piezoelectric materials using the vari- ational asymptotic

  3. EFFECTS OF INNOVATION TYPES ON FIRM PERFORMANCE Gurhan GUNDAYa

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    , process, product, and marketing innovations on the different aspects of firm performance, including innovative, production, market, and financial performances, based on an empirical study covering 184; Kuratko et al., 2005). Innovation as a term is not only related to products and processes, but is also

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

    E-Print Network [OSTI]

    Wolfley, Jared Lynn

    2009-05-15

    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...

  5. Memory Space Representation Heterogeneous Network Process Migration

    E-Print Network [OSTI]

    Sun, Xian-He

    Memory Space Representation for Heterogeneous Network Process Migration Kasidit Chanchio Xian@bit.csc.lsu.edu http://www.csc.lsu.edu/~scs/ Abstract A major difficulty of heterogeneous process migration is how and effective for heterogeneous network process migration. 1. Introduction As network computing becomes

  6. Innovation Output Choices and Characteristics of Firms in the U.S.

    E-Print Network [OSTI]

    Sanchez, Juana

    2014-01-01

    Determinants of firm’s innovation. Prague Economic Papers2011). Service-sector competition, innovation and R&D.Economics of Innovation and New Technology 20 (1-2), 63–88.

  7. 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

    2012-01-01

    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 ...

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

    E-Print Network [OSTI]

    Kulkarni, Shridhar Waman

    2009-01-01

    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 ...

  9. Energy Department Advances Market Access for U.S. Firms in Chinese...

    Energy Savers [EERE]

    Energy Department Advances Market Access for U.S. Firms in Chinese Energy Efficiency Sector Energy Department Advances Market Access for U.S. Firms in Chinese Energy Efficiency...

  10. 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 ...

  11. The Nature and Determinants of the Economic Currency Exposure of Non-Financial UK Firms 

    E-Print Network [OSTI]

    Moles, Peter; Bradley, K

    1998-01-01

    This study examines the sensitivity of sales, profit margins and input costs to exchange rate movements for non-financial, UK firms. The sample is a representative cross-section of larger, publicly-listed firms and is not ...

  12. A methodology to capture, evaluate and reformulate a firm's supply chain strategy as a conceptual system

    E-Print Network [OSTI]

    Perez-Franco, Roberto, 1976-

    2010-01-01

    A variety of events inside a firm and in its environment can motivate managers to rethink their supply chain strategy. However, the evaluation and reformulation of a firm's supply chain strategy is not a trivial problem, ...

  13. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submit the followingConcentrating DepartmentOIRVI4136Contracts &Trinity

  14. Essays on the Effect of a Financial Crisis on the Productivity of Firms

    E-Print Network [OSTI]

    Kim, Bo Kyung

    2013-01-01

    Productivity measurement . . . . . . . . . . . . . . . . . . . .firms. Productivity measurement As a productivity measure,Measurements This paper focuses on the labor productivity as

  15. Firm Internal Structures and Patent Co-inventor Networks Paper ID: 1437

    E-Print Network [OSTI]

    Lee, Dongwon

    Firm Internal Structures and Patent Co-inventor Networks Paper ID: 1437 ABSTRACT Studies about, to the best of our knowledge, is the first study that compares patent co-inventor network of firms from to identify the potential relationship between patent co-inventor characteristics and these firms' internal

  16. Business Model Innovation and Third-Party Alliance on the Survival of New Firms

    E-Print Network [OSTI]

    Velu, Chander

    2014-10-31

    strategy using a measure that captures the breadth of the products that the firms provide to the market. The geographic location of the firm matters because firms locating in a similar geography could result in a spillover of knowledge and therefore...

  17. Incentive Price Revision Firm Target UT-B Contracts Div Page 1 of 2

    E-Print Network [OSTI]

    Incentive Price Revision ­ Firm Target UT-B Contracts Div Jan 2006 Page 1 of 2 incent-price-rev-firm-ext-utbx-jan06.doc INCENTIVE PRICE REVISION - FIRM TARGET (Jan 2006) (a) General. The supplies or services identified in the Agreement as item numbers __________ are subject to price revision in accordance

  18. Mr. James R. Spaanstra James Spaanstra is a partner in the law firm of Faegre & Benson LLP. Mr. Spaanstra has been

    E-Print Network [OSTI]

    Mr. James R. Spaanstra James Spaanstra is a partner in the law firm of Faegre & Benson LLP. Mr States, where he helped develop national environmental policy. Since that time, Mr. Spaanstra has, state and federal levels. Mr. Spaanstra is a member of the Colorado Commission on Judicial Discipline

  19. Primus Power Corporation Wind Firming EnergyFarm

    Energy Savers [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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuildingBudget | Department Primus Power Corporation Wind Firming

  20. Dynamic Economy with Heterogeneous Agents 

    E-Print Network [OSTI]

    Peng, Yulei

    2013-08-06

    [32], based on US data, show that compared with high income households, low income families use cash for a higher fraction of their total consumptions. By using the cash-in-advance model, Wen[85] shows that if the annual in ation rate is 10...%, households would like to recrease up to 15% of average con- sumption an annual year in order to obtain the Friedman rule in ation rate, which is signi cantly bigger than that of with considering homogeneous agents (Lucas [66]). Therefore, the heterogeneity...

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

    E-Print Network [OSTI]

    Alagaraja, Meera

    2012-02-14

    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...

  2. Canonical Sectors and Evolution of Firms in the US Stock Markets

    E-Print Network [OSTI]

    Chachra, Ricky; Hayden, Lorien X; Ginsparg, Paul H; Sethna, James P

    2015-01-01

    A classification of companies into sectors of the economy is important for macroeconomic analysis and for investments into the sector-specific financial indices and exchange traded funds (ETFs). Major industrial classification systems and financial indices have historically been based on expert opinion and developed manually. Here we show how unsupervised machine learning can provide a more objective and comprehensive broad-level sector decomposition of stocks. An emergent low-dimensional structure in the space of historical stock price returns automatically identifies "canonical sectors" in the market, and assigns every stock a participation weight into these sectors. Furthermore, by analyzing data from different periods, we show how these weights for listed firms have evolved over time.

  3. Firm develops own EMS built on Apple computer

    SciTech Connect (OSTI)

    Pospisil, R.

    1982-04-05

    Firestone Fibers and Textile Co. programmed a $2000 desktop Apple II computer and special electronic panels designed by the engineering staff to perform process control and other energy-management functions. The system should reduce natural gas consumption 40% and save the company up to $75,000 a year by reducing the amount of hot air exhausted from fabric-treating ovens. The system can be expanded to control lights and space-conditioning equipment. The company is willing to negotiate with other firms to market the panels. The Apple II was chosen because it has a high capacity for data acquisition and testing and because of the available software. (DCK)

  4. Automatic Mapping of Real Time Radio Astronomy Signal Processing Pipelines onto Heterogeneous Clusters

    E-Print Network [OSTI]

    Filiba, Terry

    2013-01-01

    Astronomy Signal Processing Pipelines onto HeterogeneousAstronomy Signal Processing Pipelines onto HeterogeneousAstronomy Signal Processing Pipelines onto Heterogeneous

  5. Task and Machine Heterogeneities: Higher Moments Matter

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    Task and Machine Heterogeneities: Higher Moments Matter Abdulla M. Al-Qawasmeh 1 , Anthony A.potter}@colostate.edu jtsmith@digitalglobe.com Abstract - One type of heterogeneous computing (HC) systems consists of machines in this matrix represents the ETC of a specific task on a specific machine when executed exclusively. Heuristics

  6. Geophysics of Chemical Heterogeneity in the Mantle

    E-Print Network [OSTI]

    Stixrude, Lars

    , transition zone Abstract Chemical heterogeneity, produced by the near-surface rock cycle and dom- inatedGeophysics of Chemical Heterogeneity in the Mantle Lars Stixrude and Carolina Lithgow. This lithologic-scale chemical het- erogeneity may survive in the mantle for as long as the age of Earth because

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

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01

    than small companies to a military prime contract award.However, these contracts make up a very small fraction ofaside contracts are competitive, but only certified small

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

    E-Print Network [OSTI]

    Richardson, James W.; Nixon, Clair J.

    1986-01-01

    be taken for all purchases of equipment, as well as investment tax credit. If equipment or cattle are sold rather than traded in, the capital. gains or losses realized from the sale are calculated and used in computing personal income taxes. Depreciation...) standard tax tables. The model selects the tax strategy which results in the lower income tax liability. All investment tax credit allowances are deducted from the regular income tax liability with the result being compared to the income tax liability...

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

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01

    DET,NAV,GUID,AERO SYS EXXON MOBIL CORP PETROLEUM REFININGELECTRIC CO E-SYSTEMS INC EXXON MOBIL CORP FMC CORP FORD

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

    E-Print Network [OSTI]

    Goudie, Bryan Daniel

    2008-01-01

    Oil Shocks, Military Spending, and Other Driving Forces”, Board of Governors of the Federal Reserve System, International FinanceOil Shocks, Military Spending, and other Driving Forces”, Board of Governors of the Federal Reserve System, International Finance

  11. Investment and Research and Development at the Firm Level: Does the Source of Financing Matter?

    E-Print Network [OSTI]

    Hall, Bronwyn H.

    1992-01-01

    96. Kaplan, Steven N . 1989. "Management Buyouts: Evidenceon Post-Buyout Operating Changes." University of Chicagofor the case of leveraged buyouts. 5. Conclusions. This

  12. Compensation Structure and the Creation of Exploratory Knowledge in Technology Firms

    E-Print Network [OSTI]

    Cui, Victor; Ding, Waverly W.; Yanadori, Yoshio

    2011-01-01

    inventions. Strategic Management Journal, Amabile, T.M.intensive firms. Strategic Management Journal, Gerhart,intensive industries. Strategic Management Journal, 9(6),

  13. Design Data Exchange Helps AIA and Member Firms Track and Improve...

    Energy Savers [EERE]

    years ago, DOE and AIA initiated a joint project. Together, they would develop a portal that was to streamline and simplify 2030 Commitment reporting for signatory firms. The...

  14. Learning by Drilling: Inter-Firm Learning and Relationship Persistence in the Texas Oilpatch

    E-Print Network [OSTI]

    KELLOGG, RYAN M

    2007-01-01

    but do not actually drill wells themselves. Drilling isthe time required to drill each well, requires the technicalcertain firm pairings to drill more effectively than others.

  15. Bedload sheets in heterogeneous sediment

    SciTech Connect (OSTI)

    Whiting, P.J.; Dietrich, W.E.; Leopold, L.B.; Drake, T.G.; Shreve, R.L.

    1988-02-01

    Field observations in streams with beds of coarse sand and fine gravel have revealed that bedload moves primarily as thin, migrating accumulations of sediment, and coarse grains cluster at their leading edge. These accumulations are one or two coarse grains high and are much longer (0.2-0.6 m long in sand; 0.5-2.0 m in fine gravel) than their height. The authors propose the term bedload sheet for these features, and the authors argue that they result from an instability inherent to bedload movement of moderately and poorly sorted sediment. In essence, coarse particles in the bedload slow or stop each other, trap finer particles in their interstices, and thus cause the coarse particles to become mobile again. Bedload sheets develop on the stoss side of dunes, causing the dune to advance incrementally with the arrival of each sheet. Successive deposition of coarse sediment from the leading edge followed by fine sediment may generate the grain-size sorting that distinguishes cross-bedding. Available flume experiments and field observations indicate that bedload sheets are a common, but generally unrecognized, feature of heterogeneous sediment transport.

  16. Scroll Waves Pinned to Moving Heterogeneities

    E-Print Network [OSTI]

    Hua Ke; Zhihui Zhang; Oliver Steinbock

    2014-12-04

    Three-dimensional excitable systems can selforganize vortex patterns that rotate around one-dimensional phase singularities called filaments. In experiments with the Belousov-Zhabotinsky reaction and numerical simulations, we pin these scroll waves to moving heterogeneities and demonstrate the controlled repositioning of their rotation centers. If the pinning site extends only along a portion of the filament, the phase singularity is stretched out along the trajectory of the heterogeneity which effectively writes the singularity into the system. Its trailing end point follows the heterogeneity with a lower velocity. This velocity, its dependence on the placement of the anchor, and the shape of the filament are explained by a curvature flow model.

  17. HeNCE: A Heterogeneous Network Computing Environment

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

    Beguelin, Adam; Dongarra, Jack J.; Geist, George Al; Manchek, Robert; Moore, Keith

    1994-01-01

    Network computing seeks to utilize the aggregate resources of many networked computers to solve a single problem. In so doing it is often possible to obtain supercomputer performance from an inexpensive local area network. The drawback is that network computing is complicated and error prone when done by hand, especially if the computers have different operating systems and data formats and are thus heterogeneous. The heterogeneous network computing environment (HeNCE) is an integrated graphical environment for creating and running parallel programs over a heterogeneous collection of computers. It is built on a lower level package called parallel virtual machine (PVM).more »The HeNCE philosophy of parallel programming is to have the programmer graphically specify the parallelism of a computation and to automate, as much as possible, the tasks of writing, compiling, executing, debugging, and tracing the network computation. Key to HeNCE is a graphical language based on directed graphs that describe the parallelism and data dependencies of an application. Nodes in the graphs represent conventional Fortran or C subroutines and the arcs represent data and control flow. This article describes the present state of HeNCE, its capabilities, limitations, and areas of future research.« less

  18. Percolation and homogenization theories for heterogeneous materials

    E-Print Network [OSTI]

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

    2008-01-01

    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 ...

  19. INFORMATION RESOURCES MANAGEMENT IN HETEROGENEOUS, DISTRIBUTED ENVIRONMENTS

    E-Print Network [OSTI]

    Hsu, Cheng

    for Manufacturing Productivity and Technology Transfer RENSSELAER POLYTECHNIC INSTITUTE Troy, NY 12180-3590 #12INFORMATION RESOURCES MANAGEMENT IN HETEROGENEOUS, DISTRIBUTED ENVIRONMENTS: A METADATABASE Conference on Computer Integrated Manufacturing, Rensselaer Polytechnic Institute, Troy, NY 12180, May 1990

  20. Reconciling Semantic Heterogeneity in Web Services Composition

    E-Print Network [OSTI]

    Li, Xitong

    Service Oriented Computing (SOC) is a popular computing paradigm for the development of distributed Web applications. Service composition, a key element of SOC, is severely hampered by various types of semantic heterogeneity ...

  1. Heterogeneous effects in fast breeder reactors

    E-Print Network [OSTI]

    Gregory, Michael Vladimir

    1973-01-01

    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 ...

  2. Proximity Computations on Heterogeneous Computing Systems

    E-Print Network [OSTI]

    Work Optimization-based scheduling Automatically distribute dynamically generated jobs while heterogeneity) (With our optimization-based scheduling) #12;Current Work Results FPS +Tesla2075 +GTX480 +GTX580

  3. Characterizing aquifer heterogeneity using hydraulic tomography

    E-Print Network [OSTI]

    Wachter, Brian James

    2008-07-29

    Fine-scale heterogeneity in a geologic medium determines rates and directions of flow and of contaminant transport. Traditional methods of determining hydraulic conductivity provide only average values of hydraulic ...

  4. Market Structure, Internal Capital Markets, and the Boundaries of the Firm

    E-Print Network [OSTI]

    Aazhang, Behnaam

    , but this flexibility comes at a cost: integrated firms cannot commit to particular capital allocations in advanceMarket Structure, Internal Capital Markets, and the Boundaries of the Firm Richmond D. Mathews an internal capital market. An internal capital market provides resource flexibility but does not allow

  5. 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

  6. The state diagram for cell adhesion under flow: Leukocyte rolling and firm adhesion

    E-Print Network [OSTI]

    Tees, David F.J.

    The state diagram for cell adhesion under flow: Leukocyte rolling and firm adhesion Kai-Chien Chang, Philadelphia, PA, and approved July 31, 2000 (received for review May 24, 2000) Leukocyte adhesion under flow mediated by selectins) followed by firm adhesion (primarily me- diated by integrins). Using a computational

  7. Firm-based Measurements of Market Power in Transmission-Constrained Electricity

    E-Print Network [OSTI]

    Baldick, Ross

    Firm-based Measurements of Market Power in Transmission-Constrained Electricity Markets: Technical: Transmission constraints, electricity markets, market power, market power index, residual supply index. 1 approaches to analyzing firm-based market power con- sidering transmission constraints are proposed. One

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

    E-Print Network [OSTI]

    Lew, Sung Hee

    2012-10-03

    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 ...

  9. Multiscale Conformational Heterogeneity in Staphylococcal Protein A: Possible Determinant

    E-Print Network [OSTI]

    Richardson, David

    to conformational heterogeneity in crys- tal structures, from diverse crystal contacts to functionally rele- vant

  10. ComputerScience,TexasA&MUniversity Modeling Heterogeneous User

    E-Print Network [OSTI]

    Loguinov, Dmitri

    1 ComputerScience,TexasA&MUniversity Modeling Heterogeneous User Churn and Local Resilience of Unstructured P2P Networks Modeling Heterogeneous UserModeling Heterogeneous User Churn and Local Resilience ofChurn Churn and Local Resilience of Unstructured P2P Networks Modeling Heterogeneous User

  11. Transfers of user process innovations to process equipment producers: A study of Dutch high-tech firms

    E-Print Network [OSTI]

    de Jong, Jeroen P. J.

    A detailed survey of 498 high technology small and medium-sized enterprises in the Netherlands shows process innovation by user firms to be common practice. Fifty-four percent of these firms reported developing entirely ...

  12. Percolation model for growth rates of aggregates and its application for business firm growth Dongfeng Fu,1

    E-Print Network [OSTI]

    Buldyrev, Sergey

    Percolation model for growth rates of aggregates and its application for business firm growth of business firm growth, we develop a dynamic percolation model which captures some of the features of the economical system--i.e., merging and splitting of business firms-- represented as aggregates on a d

  13. Three Essays in Applied Microeconomics 

    E-Print Network [OSTI]

    Han, Sungmin

    2013-04-22

    propensity score matching method. For the second part, using household level panel data, it addresses the substantial heterogeneity across demographic groups. In addition, for the last section, I also investigate firm’s optimal innovation strategy...

  14. 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

  15. Applying an ObjectOriented Petri Net Language to Heterogeneous Systems Design

    E-Print Network [OSTI]

    Esser, Robert

    Applying an Object­Oriented Petri Net Language to Heterogeneous Systems Design Robert Esser ESEC SA and Networks Laboratory Swiss Federal Institute of Technology (ETH) Zurich, Switzerland {janneck, naedele and data or material flow dominated parts. The language consists of a class of high level time Petri nets

  16. Generic solution of the heterogeneity-induced competing risk problem in survival analysis

    E-Print Network [OSTI]

    Coolen, ACC "Ton"

    Generic solution of the heterogeneity-induced competing risk problem in survival analysis Ton for Mathematical Sciences Survival analysis and competing risks Individual versus cohort level risk analysis London Institute for Mathematical Sciences Survival analysis and competing risks Individual versus cohort

  17. 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

  18. EFFECTS OF ENTRY MODE AND INCUMBENCY STATUS ON THE RATES OF FIRM PRODUCT INNOVATION IN THE WORLDWIDE OPTICAL DISK DRIVE INDUSTRY, 1983-1999

    E-Print Network [OSTI]

    Olga M. Khessina

    2002-01-01

    the diffusion of product innovations. The Economic Journal,ON THE RATES OF FIRM PRODUCT INNOVATION IN THE WORLDWIDEon the Rates of Firm Product Innovation in the Worldwide

  19. Proposals in for Czech firms; cooperation likely with eastern Germany

    SciTech Connect (OSTI)

    Alperowicz, N.

    1993-02-10

    Two Western groups - Shell and a consortium made up of Agip, Conoco, and Total - have offered to buy the refining operations of Chemopetrol Litvinov and Kaucuk Kralupy, both in the Czech republic. Meanwhile, Amoco, Neste, and PCD are looking at the possibility of acquiring some of the plastics plants at Litvinov. Amoco is interested in the polypropylene operations, Neste in polyethylene, and PCD in both. The two Czech firms are included in the second wave of privatization, which will begin in midyear. So far, there have been no offers for the 80,000-m.t./year polystyrene and 60,000-m.t./year styrene butadiene rubber operations belonging to Kralupy, although Atochem representatives recently visited the plants. Litvinov is carrying out revamping operations at its core unit, a 12-year-old, 450,000-m.t./year ethylene plant. The plant, currently running at 400,000 m.t./year, supplies downstream plants, Neratovice, and sells on the export markets. An existing ethylene pipeline between Litvinov and Bohlen in eastern Germany, which used to supply an average 100,000 m.t./year of ethylene to Bohen in exchange for naphtha, is virtually unused. One proposal involves reactivating this exchange to secure ethylene feedstock for plants in eastern Germany. According to some sources, a preliminary decision has been made to shut down the 100,000-m.t./year ethylene plant at Leuna and possibly to expand the Bohlen cracker by 100,000 m.t./year, to 400,000 m.t./year by the late 1990s.

  20. How Credit Market Conditions Impact the Effect of Voluntary Disclosure on Firms' Cost of Debt Capital 

    E-Print Network [OSTI]

    Scott, Bret

    2012-10-19

    Prior literature finds that firms incur a lower cost of debt capital when they voluntarily disclose information. However, the economic literature demonstrates that creditors' lending standards become more stringent (lax) when credit is rationed...

  1. The study of the communication patterns of Boston-Cambridge regional biotech firms to universities

    E-Print Network [OSTI]

    Hashmi, Nada

    2008-01-01

    This paper analyzes data from a study which focused on understanding the informal scientific communication network among Biotechnology firms in the Boston-Cambridge Biotech area. A previous study (Allen, et. al., 2009) ...

  2. Managerial prestige and post-IPO firm performance: a partially mediated model 

    E-Print Network [OSTI]

    Reutzel, Christopher Ray

    2009-05-15

    The role of top managers in shaping the performance of the firms that employ them represents a central issue to strategic management research. Indeed, a substantial amount of research has examined potential linkages between the characteristics...

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

    E-Print Network [OSTI]

    Mekaroonreung, Maethee

    2012-10-19

    of polluting firms is characterized by weak disposability between outputs and pollutants to reflecting the opportunity cost to reduce pollutants. The StoNED method is extended to estimate a weak disposability frontier production function accounting for random...

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

    E-Print Network [OSTI]

    Gates, Craig

    2008-07-25

    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...

  5. The strategic use of an information system in supporting architectural design decisions for a design firm

    E-Print Network [OSTI]

    Liu, Lu, M.S. Massachusetts Institute of Technology

    1985-01-01

    This thesis is to illustrate how a computer-based information system for supporting decision making, that is a Decision Support System (DSS), can be utilized as a strategic tool in architectural design for a firm. The ...

  6. Analysis of investment prospects for Chinese private equity firms in the U.S. market

    E-Print Network [OSTI]

    Wang, Huifeng, S.M. Massachusetts Institute of Technology

    2015-01-01

    With the wealth and experience accumulated during the past decade, Chinese private equity (PE) firms have emerged as active investors in cross-border acquisition deals. Ambitious global expansion plans of Chinese companies ...

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

    E-Print Network [OSTI]

    Zhao, Zhongyao (Zhongyao Charls)

    2007-01-01

    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 ...

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

    E-Print Network [OSTI]

    Alonso, Elisa (Elisa Yun Han)

    2010-01-01

    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 ...

  9. How Sales Taxes Affect Customer and Firm Behavior: The Role of Search on the Internet

    E-Print Network [OSTI]

    Anderson, Eric T.

    When a multichannel retailer opens its first retail store in a state, the firm is obligated to collect sales taxes on all Internet and catalog orders shipped to that state. This article assesses how opening a store affects ...

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

    E-Print Network [OSTI]

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

    2007-01-01

    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 ...

  11. 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 ...

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

    E-Print Network [OSTI]

    Döhnert, Sylvia, 1970-

    2003-01-01

    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 ...

  13. 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

  14. THE IMPACT OF DYNAMICALLY HETEROGENEOUS MULTICORE

    E-Print Network [OSTI]

    Sorin, Daniel J.

    -Core Opteron, Sun Microsystems' Niagara,2 and IBM's Power5.3 These pro- cessors have between two and eight SHOWS THAT OPERATING SYSTEM SCHEDULERS MUST CONSIDER DYNAMIC HETEROGENEITY OR SUFFER SIGNIFICANT POWER of homogeneous cores.6,7 With core special- ization, runtime fault handling, and power management, it is likely

  15. 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

  16. Heterogeneous lithium niobate photonics on silicon substrates

    E-Print Network [OSTI]

    Fathpour, Sasan

    /waveguide on silicon," J. Lightwave Technol. 25(7), 1826­1831 (2007). 4. M. J. Weber, Handbook of Optical Materials and selective oxidation of refractory metals. The heterogeneous photonic platform is employed to demonstrate as a new electro-optic material," Nature 441(7090), 199­202 (2006). 7. K. K. Tsia, S. Fathpour, and B

  17. Systematically heterogeneous covariance in network gev models

    E-Print Network [OSTI]

    Bierlaire, Michel

    large in certain market seg- ments. The results also suggest that the two heterogeneous models with increasing computational power, but still requires substantial extra computational and memory resources and vector parameters respectively, and F is a transformational function with the properties that F (-) = 0

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

    E-Print Network [OSTI]

    Magid, K. R.

    2009-01-01

    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

  19. Spatial control in the heterogeneous nucleation of water

    E-Print Network [OSTI]

    Varanasi, Kripa K.

    Heterogeneous nucleation of water plays an important role in a wide range of natural and industrial processes. Though heterogeneous nucleation of water is ubiquitous and an everyday experience, spatial control of this ...

  20. STOCHASTIC DESIGN AND CONTROL IN RANDOM HETEROGENEOUS MATERIALS

    E-Print Network [OSTI]

    Del Moral , Pierre

    STOCHASTIC DESIGN AND CONTROL IN RANDOM HETEROGENEOUS MATERIALS RAPHAEL STERNFELS AND PHAEDON-STELIOS KOUTSOURELAKIS Abstract. The present paper discusses a sampling framework that enables the optimization concerned with problems relating to random heterogeneous materials where uncertainties arise from

  1. Change Management in Heterogeneous Semistructured Databases (Demonstration Description) \\Lambda

    E-Print Network [OSTI]

    Chawathe, Sudarshan S.

    Change Management in Heterogeneous Semistructured Databases (Demonstration Description) \\Lambda the trigger should fire. At Stanford we are addressing the problem of change management in heterogeneous TDIFF CORE QSS Tsimmis Figure 1: Components of our change management system subscribers of changes

  2. 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

  3. 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

  4. Virus transport in physically and geochemically heterogeneous subsurface porous media

    E-Print Network [OSTI]

    Ryan, Joe

    Virus transport in physically and geochemically heterogeneous subsurface porous media Subir for virus transport in physically and geochemically heterogeneous subsurface porous media is presented. The model involves solution of the advection­dispersion equation, which additionally considers virus

  5. 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)

    2013-07-18

    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.

  6. Microgrids and Heterogeneous Power Quality and Reliability

    SciTech Connect (OSTI)

    LaCommare, Kristina; Marnay, Chris

    2007-10-01

    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.

  7. Dedicated heterogeneous node scheduling including backfill scheduling

    DOE Patents [OSTI]

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

    2006-07-25

    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.

  8. The economic utilization and value of time savings to trucking fleets of private firms resulting from improved highways 

    E-Print Network [OSTI]

    McFarland, William F

    1963-01-01

    . Market Areas Multiple-Plant Firms . . . ~ 53 57 61 64 IVo CASE STUDY 70 The Firm. . . . . ~ Value of Time Savings Under Present Operations Extension of Market Areas Location of Retail Outlets . . . . . ~ SUMMARY AND CONCLUSIONS . ~ ~ APPENDIX... of Value Added per Hour Derivati. ons by Composite Axle-Class . . . . . . . . . . . . . . . . . 88 vi LIST OF ILLUSTRATIONS Figure Page l. Existing and Potential Market Area Radius, Retail Outlets of Merchandising Firm in East and South...

  9. E-commerce between a large firm and a SME supplier: a screening model

    E-Print Network [OSTI]

    Veronica, Alderete Maria

    2009-01-01

    This paper derives a model of screening contracts in the presence of positive network effects when building an electronic commerce network (e-commerce) between a large firm and a small and medium sized enterprise (SME) supplier based on Compte (2008). Compte (2008) main insight is that when several potential candidates compete for the task, the principal will in general improve the performance of his firm by inducing the member candidates to assess their competence before signing the contract (through an appropriate choice of contracts). The large firm (principal) must choose between different SME suppliers (agents) to build a business to business e-commerce network. In the presence of positive network externalities, we show that social surplus increases.

  10. Markovian Search Games in Heterogeneous Spaces

    SciTech Connect (OSTI)

    Griffin, Christopher H [ORNL

    2009-01-01

    We consider how to search for a mobile evader in a large heterogeneous region when sensors are used for detection. Sensors are modeled using probability of detection. Due to environmental effects, this probability will not be constant over the entire region. We map this problem to a graph search problem and, even though deterministic graph search is NP-complete, we derive a tractable, optimal, probabilistic search strategy. We do this by defining the problem as a differential game played on a Markov chain. We prove that this strategy is optimal in the sense of Nash. Simulations of an example problem illustrate our approach and verify our claims.

  11. Heterogeneously integrated microsystem-on-a-chip

    DOE Patents [OSTI]

    Chanchani, Rajen (Albuquerque, NM)

    2008-02-26

    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.

  12. A New Equivalence Theory Method for Treating Doubly Heterogeneous Fuel - II. Verifications

    SciTech Connect (OSTI)

    Choi, Sooyoung; Kong, Chidong; Lee, Deokjung; Williams, Mark L.

    2015-03-09

    A new methodology has been developed recently to treat resonance self-shielding in systems for which the fuel compact region of a reactor lattice consists of small fuel grains dispersed in a graphite matrix. The theoretical development adopts equivalence theory in both micro- and macro-level heterogeneities to provide approximate analytical expressions for the shielded cross sections, which may be interpolated from a table of resonance integrals or Bondarenko factors using a modified background cross section as the interpolation parameter. This paper describes the first implementation of the theoretical equations in a reactor analysis code. In order to reduce discrepancies caused by use of the rational approximation for collision probabilities in the original derivation, a new formulation for a doubly heterogeneous Bell factor is developed in this paper to improve the accuracy of doubly heterogeneous expressions. This methodology is applied to a wide range of pin cell and assembly test problems with varying geometry parameters, material compositions, and temperatures, and the results are compared with continuous-energy Monte Carlo simulations to establish the accuracy and range of applicability of the new approach. It is shown that the new doubly heterogeneous self-shielding method including the Bell factor correction gives good agreement with reference Monte Carlo results.

  13. A New Equivalence Theory Method for Treating Doubly Heterogeneous Fuel - II. Verifications

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

    Choi, Sooyoung; Kong, Chidong; Lee, Deokjung; Williams, Mark L.

    2015-03-09

    A new methodology has been developed recently to treat resonance self-shielding in systems for which the fuel compact region of a reactor lattice consists of small fuel grains dispersed in a graphite matrix. The theoretical development adopts equivalence theory in both micro- and macro-level heterogeneities to provide approximate analytical expressions for the shielded cross sections, which may be interpolated from a table of resonance integrals or Bondarenko factors using a modified background cross section as the interpolation parameter. This paper describes the first implementation of the theoretical equations in a reactor analysis code. In order to reduce discrepancies caused bymore »use of the rational approximation for collision probabilities in the original derivation, a new formulation for a doubly heterogeneous Bell factor is developed in this paper to improve the accuracy of doubly heterogeneous expressions. This methodology is applied to a wide range of pin cell and assembly test problems with varying geometry parameters, material compositions, and temperatures, and the results are compared with continuous-energy Monte Carlo simulations to establish the accuracy and range of applicability of the new approach. It is shown that the new doubly heterogeneous self-shielding method including the Bell factor correction gives good agreement with reference Monte Carlo results.« less

  14. Electronic copy available at: http://ssrn.com/abstract=1304775 THE EXTROVERTED FIRM

    E-Print Network [OSTI]

    , Complementarities, High Performance Work Practices, Product Development, High-Tech Clusters Acknowledgements: We. Our results may help explain why firms that operate in information-rich environments such as high-technology clusters or areas with high worker mobility have experienced especially high returns to IT investment

  15. The Calculus of Variations The variational principles of mechanics are firmly rooted in the

    E-Print Network [OSTI]

    Hunter, John K.

    LECTURE 3 The Calculus of Variations The variational principles of mechanics are firmly rooted in the soil of that great century of Liberalism which starts with Descartes and ends with the French, from geometry to optimization to mechanics, and it has grown so large that it is difficult to describe

  16. Managing Business-to-Business Customer Relationships Following Key Contact Employee Turnover in a Vendor Firm

    E-Print Network [OSTI]

    Bendapudi, Neeli; Leone, Robert P.

    2002-04-01

    Customers form relationships with the employees who serve them as well as with the vendor firms these employees represent. In many cases, a customer’s relationship with an employee who is closest to them, a key contact employee, may be stronger than...

  17. 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

  18. The Gift of Gab: Evidence TelE-Commerce Firms Can Profit from Viral Marketing

    E-Print Network [OSTI]

    Volinsky, Chris

    The Gift of Gab: Evidence TelE-Commerce Firms Can Profit from Viral Marketing Shawndra Hill New Florham Park, New Jersey 07934, USA volinsky@research.att.com ABSTRACT Viral or buzz marketing takesE-commerce is an ideal domain within which to study viral marketing, because communication linkages can be observed

  19. A Downtown Denver Law Firm Leverages Tenant Improvement Funds to Cut Operating Expenses

    SciTech Connect (OSTI)

    2013-03-01

    Bryan Cave HRO (formerly Holme Roberts & Owen LLP, headquartered in Denver, Colorado), an international law firm, partnered with the U.S Department of Energy (DOE) to develop and implement solutions to retrofit existing buildings to reduce annual energy consumption by at least 30% versus pre-retrofit energy use as part of DOE’s Commercial Building Partnership (CBP) program.

  20. 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

    2012-01-01

    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 ...

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

    E-Print Network [OSTI]

    .S. transmission system is under stress (Abraham, 2002). Growth of electricity demand and new generation capacity investment in new generation and growth in electricity demand. Much of the current underinvestment1 Do Generation Firms in Restructured Electricity Markets Have Incentives to Support Socially

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

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    lovely new specimens that the palate never cloyed." ­-- Paul A. Samuelson in his introduction) and from conduct to performance (price-cost margins or profitability). Implicit behind this approach equilibrium either with or without entry barriers, the actual process of firm entry and exit through which

  3. 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 of Toronto okhope@rotman.utoronto.ca August 19, 2014 Abstract Health-insurance premiums account for a significant portion of the cost base of U.S. corporations. A recent study finds that health-insurance premiums

  4. 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.

    2010-07-14

    I examine the association between earnings quality and audit firm type using a three-tiered audit firm classification scheme which allows for an explicit examination of the quality of Second-Tier audited earnings. My tests are motivated by the lack...

  5. Intratumor heterogeneity alters most effective drugs in designed combinations

    E-Print Network [OSTI]

    Zhao, Boyang

    The substantial spatial and temporal heterogeneity observed in patient tumors poses considerable challenges for the design of effective drug combinations with predictable outcomes. Currently, the implications of tissue ...

  6. Pool Heterogeneity and the Valuation of Mortgage-Backed Securities

    E-Print Network [OSTI]

    Stanton, Richard

    1992-01-01

    Van Drunen. “Pricing Mortgage Pools with Heterogeneous Mort-shows proportion of pools in sample with estimated ? fallingmethodology for deriving pool-speci?c mortgage-backed

  7. Optimization of the dynamic behavior of strongly nonlinear heterogeneous materials

    E-Print Network [OSTI]

    Herbold, Eric B.

    2008-01-01

    dissimilar granular materials) and for optimization of shockOptimization of Dynamic Behavior in Heterogeneous Materials (band-gap materials and structures by topology optimization.

  8. Feedbacks between hydrological heterogeneity and bioremediation induced biogeochemical transformations

    E-Print Network [OSTI]

    Englert, A.

    2009-01-01

    Water Resources Research 2008, 44, W10412, doi:10.1029/2007WR006425. Supporting Information Feedbacks Between Hydrological Heterogeneity and Bioremediation

  9. Heterogeneous Force Chains in Cellularized Biopolymer Network

    E-Print Network [OSTI]

    Liang, Long; Sun, Bo; Jiao, Yang

    2015-01-01

    Biopolymer Networks play an important role in coordinating and regulating collective cellular dynamics via a number of signaling pathways. Here, we investigate the mechanical response of a model biopolymer network due to the active contraction of embedded cells. Specifically, a graph (bond-node) model derived from confocal microscopy data is used to represent the network microstructure, and cell contraction is modeled by applying correlated displacements at specific nodes, representing the focal adhesion sites. A force-based stochastic relaxation method is employed to obtain force-balanced network under cell contraction. We find that the majority of the forces are carried by a small number of heterogeneous force chains emitted from the contracting cells. The force chains consist of fiber segments that either possess a high degree of alignment before cell contraction or are aligned due to the reorientation induced by cell contraction. Large fluctuations of the forces along different force chains are observed. ...

  10. Thermal Maps of Gases in Heterogeneous Reactions

    E-Print Network [OSTI]

    Jarenwattananon, Nanette N; Otto, Trenton; Melkonian, Arek; Morris, William; Burt, Scott R; Yaghi, Omar M; Bouchard, Louis-S

    2015-01-01

    Over 85% of all chemical industry products are made using catalysts, with the overwhelming majority of these employing heterogeneous catalysts functioning at the gas-solid interface. Consequently, optimizing catalytic reactor design attracts much effort. Such optimization relies on heat transfer and fluid dynamics modeling coupled to surface reaction kinetics. The complexity of these systems demands many approximations, which can only be tested with experimental observations of quantities such as temperature, pressure, concentrations, flow rates, etc. One essential measurement is a map of the spatial variation in temperature throughout the catalyst bed. We present here the first non-invasive maps of gas temperatures in catalyst-filled reactors, including high spatial resolution maps in microreactors enabled by parahydrogen. The thermal maps reveal energy flux patterns whose length scale correlates with the catalyst packing. By exploiting the motional averaging under a weak applied magnetic-field gradient, the...

  11. 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)

    2014-06-15

    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.

  12. Heterogeneous metasurface for high temperature selective emission

    SciTech Connect (OSTI)

    Woolf, D., E-mail: dwoolf@psicorp.com; Hensley, J. [Physical Sciences, Inc., 20 New England Business Center, Andover, Massachusetts 01810 (United States); Cederberg, J. G.; Bethke, D. T.; Grine, A. D.; Shaner, E. A. [Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)

    2014-08-25

    We demonstrate selective emission from a heterogeneous metasurface that can survive repeated temperature cycling at 1300?K. Simulations, fabrication, and characterization were performed for a cross-over-a-backplane metasurface consisting of platinum and alumina layers on a sapphire substrate. The structure was stabilized for high temperature operation by an encapsulating alumina layer. The geometry was optimized for integration into a thermophotovoltaic (TPV) system, and was designed to have its emissivity matched to the external quantum efficiency spectrum of 0.6?eV InGaAs TPV material. We present spectral measurements of the metasurface that result in a predicted 22% optical-to-electrical power conversion efficiency in a simplified model at 1300?K. Furthermore, this broadly adaptable selective emitter design can be easily integrated into full-scale TPV systems.

  13. Accelerating Subsurface Transport Simulation on Heterogeneous Clusters

    SciTech Connect (OSTI)

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

    2013-09-23

    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.

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

    E-Print Network [OSTI]

    Murdaya, Karuna

    2005-01-01

    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 ...

  15. 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

    1990-01-01

    to a 60 cent per gallon subsidy on each gallon of ethanol blended with gasoline. Other federal incentives include the Crude Oil Windfall Profit Tax of 1980 which gave blenders of ethanol an income tax credit and extended the gasoline tax exemption... subsidies providing for all off- highway uses of diesel fuel and gasoline to be exempt from Federal Excise taxes. Also, the Federal Crop Insurance Corporation has provided insurance against production losses due to weather and other perils at subsidized...

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

    E-Print Network [OSTI]

    Elmer,Nicole Audra

    1997-01-01

    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...

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

    E-Print Network [OSTI]

    Campbell, Joanna

    2012-07-16

    The manager's personal wealth is one of the central building blocks of agency theory, which considers wealth to be an especially important source of individual utility. The managers' financial position, or the portion of ...

  18. 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

  19. 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

  20. Autonomous Demand Response in Heterogeneous Smart Grid Topologies

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    1 Autonomous Demand Response in Heterogeneous Smart Grid Topologies Hamed Narimani and Hamed-mails: narimani-hh@ec.iut.ac.ir and hamed@ee.ucr.edu Abstract--Autonomous demand response (DR) is scalable and has demand response systems in heterogeneous smart grid topologies. Keywords: Autonomous demand response

  1. 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

  2. Global Cost Diversity Aware Dispatch Algorithm for Heterogeneous Data Centers

    E-Print Network [OSTI]

    Fedorova, Alexandra

    Global Cost Diversity Aware Dispatch Algorithm for Heterogeneous Data Centers Ananth Narayan S. ans centers located across the globe. These data centers often house a heterogeneous computing infrastruc exploits both the data center het- erogeneity and global electricity market diversity to reduce data center

  3. Cooperative Decentralized Resource Allocation in Heterogeneous Wireless Access Medium

    E-Print Network [OSTI]

    Zhuang, Weihua

    1 Cooperative Decentralized Resource Allocation in Heterogeneous Wireless Access Medium Muhammad--In this paper, radio resource allocation in a hetero- geneous wireless access medium is investigated. Mobile the performance tradeoffs of the proposed algorithm. Index Terms--Heterogeneous wireless networks, resource allo

  4. Thermal Properties of Graphene-Copper-Graphene Heterogeneous Pradyumna Goli,

    E-Print Network [OSTI]

    Thermal Properties of Graphene-Copper-Graphene Heterogeneous Films Pradyumna Goli, Hao Ning that gra- phene-Cu-graphene heterogeneous films reveal strongly enhanced thermal conductivity as compared to the reference Cu and annealed Cu films. Chemical vapor deposition of a single atomic plane of graphene on both

  5. An Efficient Stochastic Clustering Auction for Heterogeneous Robot Teams

    E-Print Network [OSTI]

    Barbu, Adrian

    An Efficient Stochastic Clustering Auction for Heterogeneous Robot Teams Kai Zhang and Emmanuel G for effective coordination of heterogeneous robotic systems have numerous applications. For example, they can be used for efficient task allocation for teams of robots in many application domains [1], [2] such as col

  6. Process Migration for Heterogeneous Distributed Systems Matt Bishop

    E-Print Network [OSTI]

    Process Migration for Heterogeneous Distributed Systems Matt Bishop Department of Computer Science and mechanisms for migrating processes in a distributed system become more complicated in a heterogeneous the means to migrate processes to the idle resources. In this paper, we present a graph model for single

  7. THE EFFECT OF HETEROGENEITY IN TEAMS OF 100+ MOBILE ROBOTS

    E-Print Network [OSTI]

    Parker, Lynne E.

    THE EFFECT OF HETEROGENEITY IN TEAMS OF 100+ MOBILE ROBOTS Lynne E. Parker Department of Computer Science The University of Tennessee Knoxville, Tennessee USA parker@cs.utk.edu in Multi-Robot Systems for Distributed Robotics (SDR) Program, aimed at the practical implementation of a team of 100+ heterogeneous

  8. Heterogeneous Hardware Accelerator Architecture for Streaming Image Processing

    E-Print Network [OSTI]

    Bertels, Koen

    Heterogeneous Hardware Accelerator Architecture for Streaming Image Processing Cuong PhamCuong,Z.Al-Ars,K.L.M.Bertels}@tudelft.nl Abstract--This paper proposes a heterogeneous hardware-processed on a host processor and sent to hardware kernels. The host processor and the hardware kernels process

  9. 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

  10. Heterogeneous ice nucleation controlled by the coupling of surface crystallinity and surface hydrophilicity

    E-Print Network [OSTI]

    Bi, Yuanfei; Li, Tianshu

    2015-01-01

    The microscopic mechanisms controlling heterogeneous ice nucleation are complex and remain poorly understood. Although good ice nucleators are generally believed to match ice lattice and to bind water, counter examples are often identified. Here we show, by advanced molecular simulations, that the heterogeneous nucleation of ice on graphitic surface is controlled by the coupling of surface crystallinity and surface hydrophilicity. Molecular level analysis reveals that the crystalline graphitic lattice with an appropriate hydrophilicity may indeed template ice basal plane by forming a strained ice layer, thus significantly enhancing its ice nucleation efficiency. Remarkably, the templating effect is found to transit from within the first contact layer of water to the second as the hydrophilicity increases, yielding an oscillating distinction between the crystalline and amorphous graphitic surfaces in their ice nucleation efficiencies. Our study sheds new light on the long-standing question of what constitutes ...

  11. 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

    1995-12-01

    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.

  12. Low Frequency Scattering Resonance Wave in Strong Heterogeneity

    E-Print Network [OSTI]

    Liu, Yinbin

    2015-01-01

    Multiple scattering of wave in strong heterogeneity can cause resonance-like wave phenomenon where signal exhibits low frequency, high intensity, and slowly propagating velocity. For example, long period event in volcanic seismology and surface plasmon wave and quantum Hall effect in wave-particle interactions. Collective behaviour in a many-body system is usually thought to be the source for generating the anomaly. However, the detail physical mechanism is not fully understood. Here I show by wave field modeling for microscopic bubble cloud model and 1D heterogeneity that the anomaly is related to low frequency scattering resonance happened in transient regime. This low frequency resonance is a kind of wave coherent scattering enhancement phenomenon in strongly-scattered small-scale heterogeneity. Its resonance frequency is inversely proportional to heterogeneous scale and contrast and will further shift toward lower frequency with random heterogeneous scale and velocity fluctuations. Low frequency scatterin...

  13. 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)

    2011-01-01

    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 ...

  14. Evaluating managerial adjustment to farm firm growth: an aplication to investments in sealed storage systems 

    E-Print Network [OSTI]

    Greathouse, Gregory John

    1976-01-01

    sources of managerial adjustment to investment in sealed storage systemst 2)to empirically measure the timing and magnitude of these adjustment factors~ 3)to evaluate the implications of these measures of firm growth and resulting liquidity position... with the sealed storage system included~ 1) labo~ savings, 2)reduced field losses, 3)milk production 'ncrease in about one-half of the cases, 4)increase in multiple fillings through time, 5)machinery changes, 6)different forage crops, 7)different forage...

  15. The Impact of Stewardship on Firm Performance: A Family Ownership and Internal Governance Perspective 

    E-Print Network [OSTI]

    Wesley, Curtis Leonus

    2012-02-14

    stream_source_info WESLEY-DISSERTATION.pdf.txt stream_content_type text/plain stream_size 182391 Content-Encoding ISO-8859-1 stream_name WESLEY-DISSERTATION.pdf.txt Content-Type text/plain; charset=ISO-8859...-1 ? THE IMPACT OF STEWARDSHIP ON FIRM PERFORMANCE: A FAMILY OWNERSHIP AND INTERNAL GOVERNANCE PESPECTIVE A Dissertation by CURTIS LEONUS WESLEY Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment...

  16. Heterogeneous Force Chains in Cellularized Biopolymer Network

    E-Print Network [OSTI]

    Long Liang; Christopher Jones; Bo Sun; Yang Jiao

    2015-08-18

    Biopolymer Networks play an important role in coordinating and regulating collective cellular dynamics via a number of signaling pathways. Here, we investigate the mechanical response of a model biopolymer network due to the active contraction of embedded cells. Specifically, a graph (bond-node) model derived from confocal microscopy data is used to represent the network microstructure, and cell contraction is modeled by applying correlated displacements at specific nodes, representing the focal adhesion sites. A force-based stochastic relaxation method is employed to obtain force-balanced network under cell contraction. We find that the majority of the forces are carried by a small number of heterogeneous force chains emitted from the contracting cells. The force chains consist of fiber segments that either possess a high degree of alignment before cell contraction or are aligned due to the reorientation induced by cell contraction. Large fluctuations of the forces along different force chains are observed. Importantly, the decay of the forces along the force chains is significantly slower than the decay of radially averaged forces in the system. These results suggest that the fibrous nature of biopolymer network structure can support long-range force transmission and thus, long-range mechanical signaling between cells.

  17. Coordinated Collaboration between Heterogeneous Distributed Energy Resources

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

    Abdollahy, Shahin; Lavrova, Olga; Mammoli, Andrea

    2014-01-01

    A power distribution feeder, where a heterogeneous set of distributed energy resources is deployed, is examined by simulation. The energy resources include PV, battery storage, natural gas GenSet, fuel cells, and active thermal storage for commercial buildings. The resource scenario considered is one that may exist in a not too distant future. Two cases of interaction between different resources are examined. One interaction involves a GenSet used to partially offset the duty cycle of a smoothing battery connected to a large PV system. The other example involves the coordination of twenty thermal storage devices, each associated with a commercial building.more »Storage devices are intended to provide maximum benefit to the building, but it is shown that this can have a deleterious effect on the overall system, unless the action of the individual storage devices is coordinated. A network based approach is also introduced to calculate some type of effectiveness metric to all available resources which take part in coordinated operation. The main finding is that it is possible to achieve synergy between DERs on a system; however this required a unified strategy to coordinate the action of all devices in a decentralized way.« less

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

    E-Print Network [OSTI]

    R. Candelier; O. Dauchot; G. Biroli

    2009-01-22

    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.

  19. A study of the correlation between pre-IPO venture funds and founder characteristics with high-tech firm growth

    E-Print Network [OSTI]

    Zaheer, Safwan

    2008-01-01

    High-tech firms are among the fastest growing in the United States. The four industries with the most rapid growth -internet, software, semiconductors, and technology hardware - have almost doubled their share of industry ...

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

    E-Print Network [OSTI]

    Duflo, Esther

    2013-07-17

    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 ...

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

    E-Print Network [OSTI]

    Lee, Eungkyoon

    2005-01-01

    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 ...

  2. A power model of management team restructuring and executive exit in IPO-stage firms: antecedents and performance effects 

    E-Print Network [OSTI]

    Li, Jun

    2005-11-01

    Despite an abundance of executive turnover research in the context of large public firms, little has focused on top executive change in entrepreneurial settings. This study attempts to develop a foundation of theory and evidence on management team...

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

    E-Print Network [OSTI]

    Rasmussen, Stephanie Jean Binger

    2010-10-12

    This study examines revenue recognition methods used by high technology firms for sales to distributors. Revenue is either recognized when products are delivered to distributors (sell-in) or when distributors resell products ...

  4. The Effect of SFAS No. 131 on the Cross-Segment Variability of Profits Reported by Multiple Segment Firms

    E-Print Network [OSTI]

    Ettredge, Michael L.; Kwon, Soo Young; Smith, David B.; Stone, Mary S.

    2006-01-01

    Our study assesses whether SFAS No. 131 improved disclosure about the diversity of multiple segment firms’ operations. We find a post-SFAS No. 131 increase in cross-segment variability of segment profits, an increase in ...

  5. 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

  6. 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 ...

  7. An approach to composing web services with context heterogeneity

    E-Print Network [OSTI]

    Madnick, Stuart E.

    The potential benefits of Web services composition heavily rely on semantic interoperability, i.e., the ability to exchange data meaningfully amongst Web services. Context heterogeneity, which refers to different implicit ...

  8. Dynamic sensor tasking in heterogeneous, mobile sensor networks

    E-Print Network [OSTI]

    Jones, Peter B. (Peter B.), S.M., Massachusetts Institute of Technology

    2005-01-01

    Modern sensor environments often attempt to combine several sensors into a single sensor network. The nodes of this network are generally heterogeneous and may vary with respect to sensor complexity, sensor operational ...

  9. Discrete Feature Approach for Heterogeneous Reservoir Production Enhancement

    SciTech Connect (OSTI)

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

    2002-07-26

    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.

  10. 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

  11. 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

  12. Adapting a delay-based protocol to heterogeneous environments 

    E-Print Network [OSTI]

    Kotla, Kiran

    2008-10-10

    We investigate the issues in making a delay-based protocol adaptive to heterogeneous environments. We assess and address the problems a delay-based protocol faces when competing with a loss-based protocol such as TCP. We ...

  13. OSCAR Parallelizing Compiler Cooperative Heterogeneous Multi-core Architecture

    E-Print Network [OSTI]

    Kasahara, Hironori

    OSCAR Parallelizing Compiler Cooperative Heterogeneous Multi-core Architecture Akihiro Hayashi, powerful parallelizing compiler for hetero- geneous multi-core architectures is expected. Furthermore, cooperative work between parallelizing compiler and hetero- geneous multi-core architectures is important

  14. A Parallelizing Compiler Cooperative Heterogeneous Multicore Processor Architecture

    E-Print Network [OSTI]

    Kasahara, Hironori

    A Parallelizing Compiler Cooperative Heterogeneous Multicore Processor Architecture Yasutaka Wada and a parallelizing com- piler is important. This paper proposes a compiler cooperative hetero- geneous multicore architecture and parallelizing compilation scheme for it. Performance of the proposed scheme is evaluated

  15. Stabilization of Ion Concentration Polarization Using a Heterogeneous Nanoporous Junction

    E-Print Network [OSTI]

    Kim, Pilnam

    We demonstrate a recycled ion-flux through heterogeneous nanoporous junctions, which induce stable ion concentration polarization with an electric field. The nanoporous junctions are based on integration of ionic hydrogels ...

  16. The variation of apparent crown size and canopy heterogeneity across

    E-Print Network [OSTI]

    Malhi, Yadvinder

    , 2 IRD-UMR Botanique et Bioinformatique de l'Architecture des Plantes (AMAP), Boulevard de la Lironde and Africa. Some regions show significantly greater canopy heterogeneity, a feature that may be related

  17. 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

  18. Acid Fracturing Feasibility Study for Heterogeneous Carbonate Formation 

    E-Print Network [OSTI]

    Suleimenova, Assiya

    2015-03-03

    Acid fracturing is a stimulation technique that is commonly used by the industry to increase productivity or injectivity of wells in carbonate reservoirs. To determine a feasibility of acid fracturing treatment for a heterogeneous formation...

  19. MODELING PHOTOSYNTHESIS OF HETEROGENEOUS ROSE CROP CANOPIES IN THE GREENHOUSE

    E-Print Network [OSTI]

    Lieth, J. Heinrich

    MODELING PHOTOSYNTHESIS OF HETEROGENEOUS ROSE CROP CANOPIES IN THE GREENHOUSE Soo-Hyung Kim and J training system ("bent canopy") is widely used in greenhouse rose production. The bent canopy consists

  20. Entrainment of heterogeneous glycolytic oscillations in single cells

    E-Print Network [OSTI]

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

    2015-01-01

    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...

  1. Genetic heterogeneity in breast cancer: the road to personalized medicine?

    E-Print Network [OSTI]

    Baird, Richard D.; Caldas, Carlos

    2013-06-21

    , Alipaz J, Bauer MJ, Beare D, Butler A, Carter RJ, Chen L, Cox AJ, Edkins S, Kokko- Gonzales PI, Gormley NA, Grocock RJ, Haudenschild CD, Hims MM, James T, Jia M, Kingsbury Z, Leroy C, Marshall J, Menzies A, et al: A comprehensive catalogue of somatic... , Next-generation sequencing, W Personalized medicine, Heterogeneity The genetic heterogeneity seen in breast cancer has important clinical implications In 2008 it was estimated that the annual number of new breast cancer diagnoses globally...

  2. Genetic heterogeneity in breast cancer: the road to personalised medicine?

    E-Print Network [OSTI]

    Baird, Richard D.; Caldas, Carlos

    2013-06-18

    , Alipaz J, Bauer MJ, Beare D, Butler A, Carter RJ, Chen L, Cox AJ, Edkins S, Kokko- Gonzales PI, Gormley NA, Grocock RJ, Haudenschild CD, Hims MM, James T, Jia M, Kingsbury Z, Leroy C, Marshall J, Menzies A, et al: A comprehensive catalogue of somatic... . Keywords: Breast cancer, Next-generation sequencing, W Personalized medicine, Heterogeneity The genetic heterogeneity seen in breast cancer has important clinical implications In 2008 it was estimated that the annual number of new breast cancer diagnoses...

  3. 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

    2014-10-26

    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.

  4. Generic solution of the heterogeneity-induced competing risk problem in survival analysis

    E-Print Network [OSTI]

    Coolen, ACC "Ton"

    Generic solution of the heterogeneity-induced competing risk problem in survival analysis J van competing risks to be induced by residual cohort heterogeneity, i.e. heterogeneity that is not captured risks that unifies the main schools of thought. Assuming heterogeneity-induced competing risks is much

  5. The MyView Project: from Heterogeneous Bibliographic Information Repositories to Personalized Digital Libraries

    E-Print Network [OSTI]

    Clausen, Michael

    at the integration of both structured and unstructured bibli­ ographic information from a diversity of heterogeneous

  6. Carbon Fund for Spanish Firms FC2E | 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmentalBowerbank,Cammack Village, Arkansas:Fund for Spanish Firms FC2E Jump to: navigation,

  7. High-level Programming of Dynamically Reconfigurable NoC-based Heterogeneous Multicore SoCs

    E-Print Network [OSTI]

    Vanderbauwhede, W.

    Vanderbauwhede,W. Dynamic Reconfigurable Network-on-Chip Design: Innovations for Computational Processing and Communication Idea Group Publishing

  8. 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

  9. The impact of nanoscience on heterogeneous catalysis

    SciTech Connect (OSTI)

    Bell, Alexis T.

    2003-03-03

    Most catalysts consist of nanometer-sized particles dispersed on a high-surface area support. Advances in characterization methods have led to a molecular level understanding of the relationships between nanoparticle properties and catalytic performance. Together with novel approaches to nanoparticle synthesis, this knowledge is contributing to the design and development of new catalysts.

  10. Persistent local order heterogeneity in the supercritical carbon dioxide

    E-Print Network [OSTI]

    Dima Bolmatov; D. Zav'yalov; M. Gao; M. Zhernenkov

    2014-06-06

    The supercritical state is currently viewed as uniform and homogeneous on the pressure-temperature phase diagram in terms of physical properties. Here, we study structural properties of the supercritical carbon dioxide, and discover the existence of persistent medium-range order correlations which make supercritical carbon dioxide non-uniform and heterogeneous on an intermediate length scale, a result not hitherto anticipated. We report on the carbon dioxide heterogeneity shell structure where, in the first shell, both carbon and oxygen atoms experience gas-like type inter- actions with short range order correlations, while within the second shell oxygen atoms essentially exhibit liquid-like type of interactions with medium range order correlations due to localisation of transverse-like phonon packets. We show that the local order heterogeneity remains in the three phase-like equilibrium within very wide temperature range. Importantly, we highlight a catalytic role of atoms inside the nearest neighbor heterogeneity shell in providing a mechanism for diffusion in the supercritical carbon dioxide on an intermediate length scale. Finally, we discuss important implications for answering the intriguing question whether Venus may have had carbon dioxide oceans and urge for an experimental detection of this persistent local order heterogeneity.

  11. Persistent local order heterogeneity in the supercritical carbon dioxide

    E-Print Network [OSTI]

    Bolmatov, Dima; Gao, M; Zhernenkov, M

    2014-01-01

    The supercritical state is currently viewed as uniform and homogeneous on the pressure-temperature phase diagram in terms of physical properties. Here, we study structural properties of the supercritical carbon dioxide, and discover the existence of persistent medium-range order correlations which make supercritical carbon dioxide non-uniform and heterogeneous on an intermediate length scale, a result not hitherto anticipated. We report on the carbon dioxide heterogeneity shell structure where, in the first shell, both carbon and oxygen atoms experience gas-like type inter- actions with short range order correlations, while within the second shell oxygen atoms essentially exhibit liquid-like type of interactions with medium range order correlations due to localisation of transverse-like phonon packets. We show that the local order heterogeneity remains in the three phase-like equilibrium within very wide temperature range. Importantly, we highlight a catalytic role of atoms inside the nearest neighbor heterog...

  12. Sequence Heterogeneity Accelerates Protein Search for Targets on DNA

    E-Print Network [OSTI]

    Alexey A. Shvets; Anatoly B. Kolomeisky

    2015-07-21

    The process of protein search for specific binding sites on DNA is fundamentally important since it marks the beginning of all major biological processes. We present a theoretical investigation that probes the role of DNA sequence symmetry, heterogeneity and chemical composition in the protein search dynamics. Using a discrete-state stochastic approach with a first-passage events analysis, which takes into account the most relevant physical-chemical processes, a full analytical description of the search dynamics is obtained. It is found that, contrary to existing views, the protein search is generally faster on DNA with more heterogeneous sequences. In addition, the search dynamics might be affected by the chemical composition near the target site. The physical origins of these phenomena are discussed. Our results suggest that biological processes might be effectively regulated by modifying chemical composition, symmetry and heterogeneity of a genome.

  13. PerCon: A Personal Digital Library for Heterogeneous Data

    E-Print Network [OSTI]

    Shipman, Frank

    PerCon: A Personal Digital Library for Heterogeneous Data Su Inn Park, Frank Shipman Center for the Study of Digital Libraries Department of Computer Science and Engineering Texas A&M University 1 a personal digital library of data. Users may then search, browse, visualize and annotate the data

  14. 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

  15. 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 material. A critical task of such synthesis in turbine blade design is an effective design method approach for turbine blade design, which ties B-spline representation of a turbine blade to a physics

  16. 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

  17. 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)

    1995-07-01

    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.

  18. HETEROGENEOUS PROCESS MIGRATION SCALABLE NETWORK OF WORKSTATIONS (SNOW)

    E-Print Network [OSTI]

    Sun, Xian-He

    HETEROGENEOUS PROCESS MIGRATION for SCALABLE NETWORK OF WORKSTATIONS (SNOW) Xian-He Sun Department of Computer Science Louisiana State University sun@bit.csc.lsu.edu URL: http://www.csc.lsu.edu/ scs/SNOW/ Nov and restoration mechanism The SNOW/MpPVM Software Environment Components and Implementation Issues Experimental

  19. Colorado Plateau magmatism and uplift by warming of heterogeneous lithosphere

    E-Print Network [OSTI]

    Pederson, Joel L.

    LETTERS Colorado Plateau magmatism and uplift by warming of heterogeneous lithosphere Mousumi Roy1 , Thomas H. Jordan2 & Joel Pederson3 The forces that drove rock uplift of the low-relief, high experienced 2 km of rock uplift7 without significant internal deformation2­4 . Here we propose that warming

  20. Alamo: An Architecture for Integrating Heterogeneous Data Sources \\Lambda

    E-Print Network [OSTI]

    Samoladas, Vasilis

    Alamo: An Architecture for Integrating Heterogeneous Data Sources \\Lambda Daniel P. Miranker an architecture, Alamo, that addresses both the semantic and physi­ cal aspects of data integration. The Alamo ar source, the Alamo architecture forms an infrastructure for the development and possi­ ble integration

  1. Fog Water and Ecosystem Function: Heterogeneity in a California

    E-Print Network [OSTI]

    Templer, Pamela

    Fog Water and Ecosystem Function: Heterogeneity in a California Redwood Forest Holly A. Ewing,1 Biology, University of Connecticut, 75 N. Eagleville Road, Storrs, Connecticut 06269, USA ABSTRACT Fog and nitrogen (N) fluxes from hori- zontally moving fog and vertically delivered rain as well as redwood tree

  2. Utility Functions and Resource Management in an Oversubscribed Heterogeneous

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    IEEEProof Utility Functions and Resource Management in an Oversubscribed Heterogeneous Computing on those being investigated by the Extreme Scale Systems Center at Oak Ridge National Laboratory. Utility a metric for the performance of resource allocation heuristics. Each task has a time-varying utility

  3. TURBULENT SHEAR STRESS IN HETEROGENEOUS SEDIMENT-LADEN FLOWS

    E-Print Network [OSTI]

    Julien, Pierre Y.

    TURBULENT SHEAR STRESS IN HETEROGENEOUS SEDIMENT-LADEN FLOWS By Hyoseop Woo,1 Associate Member are the beginning of motion of sediment particles and sediment transport in alluvial channels. If shear stress can be well defined in clear-water flows, compar- atively little is known about shear stresses in sediment

  4. Optimal Power Control in Rayleigh-fading Heterogeneous Networks

    E-Print Network [OSTI]

    Tan, Chee Wei

    specifi- cation in a heterogeneous network to minimize the total energy consumption and simultaneously fading. As a by-product, we solve an open problem of convergence for a previously proposed algorithm threshold that is often com- puted from the quality of service requirement. The statistics of the SINR

  5. Continuation Methods for Mixing Heterogeneous Sources Adrian Corduneanu

    E-Print Network [OSTI]

    Jaakkola, Tommi S.

    tasks involve esti­ mation from heterogeneous information sources. This includes classification a preferred information source with another in this setting by evolving continuous paths of fixed points important learning problems involve a compromise between competing sources of information. For example

  6. 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

  7. Modeling mesoscopic attenuation in a highly heterogeneous Biot's medium

    E-Print Network [OSTI]

    Santos, Juan

    and dispersion at seismic frequencies is known as mesoscopic loss, and is caused by the presence-wave diffusion process. It is also the case that the exact spatial distribution of these heterogeneities the effect of underground carbon dioxide (CO2) accumulations on the amplitude and attenuation of seismic

  8. 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

  9. 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

  10. Graph-based Navigation Strategies for Heterogeneous Spatial Data Sets

    E-Print Network [OSTI]

    Rodríguez-Tastets, Maria Andrea

    Graph-based Navigation Strategies for Heterogeneous Spatial Data Sets Andrea Rodr´iguez1 the information contribution of data sets based on correspondence relations outperform a strategy that considers- base representation, this work describes strategies that optimize the navigation of data sets

  11. 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

  12. Automatic Intra-Application Load Balancing for Heterogeneous Systems

    E-Print Network [OSTI]

    Huang, Wei

    Automatic Intra-Application Load Balancing for Heterogeneous Systems Michael Boyer, Shuai Che AMD #12;2 | Automatic Intra-Application Load Balancing | June 14, 2011 Motivation Many applications;3 | Automatic Intra-Application Load Balancing | June 14, 2011 Leveraging Multiple Devices Writing correct

  13. Establishment Heterogeneity, Exporter Dynamics, and the Effects of Trade Liberalization

    E-Print Network [OSTI]

    Alexandrova, Ivana

    to free trade equivalent to 1.03 percent of steady state consumption. Con- sidering the transitionEstablishment Heterogeneity, Exporter Dynamics, and the Effects of Trade Liberalization George the effect of reducing tariffs on welfare, trade, and export participation. We find sizeable gains to moving

  14. Distributed, Secure Load Balancing with Skew, Heterogeneity, and Churn

    E-Print Network [OSTI]

    Distributed, Secure Load Balancing with Skew, Heterogeneity, and Churn Jonathan Ledlie and Margo rates of node join and leave (churn), and wide variation in node network and storage capacity be heavy-tailed, and because node availability and churn rates may change over time. Learning to adapt

  15. 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

  16. An Argument for Archiving Facebook as a Heterogeneous Personal Store

    E-Print Network [OSTI]

    Marshall, Cathy

    An Argument for Archiving Facebook as a Heterogeneous Personal Store Catherine C. Marshall not archive the contents of a major social media service like Facebook to ensure the permanence to archive social media: Facebook is not only viewed as private and vulnerable to violations of content

  17. 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

  18. 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

  19. 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

  20. ADAPTIVE ONLINE ENERGY SAVING FOR HETEROGENEOUS SENSOR Meikang Qiu1

    E-Print Network [OSTI]

    Sha, Edwin

    ADAPTIVE ONLINE ENERGY SAVING FOR HETEROGENEOUS SENSOR NETWORKS Meikang Qiu1 Jingtong Hu2 Edwin H-to-predict environments and have limited lifetime. We use a novel adaptive online energy saving (AOES) algorithm to save as a probabilistic random variable to save energy by se- lecting the best mode assignment for each node, which

  1. Monitoring Marine Environments using a Team of Heterogeneous Robots

    E-Print Network [OSTI]

    Dudek, Gregory

    1 Monitoring Marine Environments using a Team of Heterogeneous Robots Yogesh Girdhar1, Anqi Xu1, Gregory Dudek1 Abstract--We present a novel approach for monitoring marine environments by a team supervisor to plan for further exploration. I. INTRODUCTION Monitoring marine environments is a challenging

  2. 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

  3. A unique dosing system for the production of OH under high vacuum for the study of environmental heterogeneous reactions

    SciTech Connect (OSTI)

    Brown, Matthew A.; Johanek, Viktor; Hemminger, John C.

    2008-02-15

    A unique dosing system for the production of hydroxyl radicals under high vacuum for the study of environmental heterogeneous reactions is described. Hydroxyl radicals are produced by the photodissociation of a hydrogen peroxide aqueous gas mixture with 254 nm radiation according to the reaction H{sub 2}O{sub 2}+h{nu} (254 nm){yields}OH+OH. Under the conditions of the current design, 0.6% conversion of hydrogen peroxide is expected yielding a hydroxyl number density on the order of 10{sup 10} molecules/cm{sup 3}. The flux distribution of the dosing system is calculated using a Monte Carlo simulation method and compared with the experimentally determined results. The performance of this unique hydroxyl dosing system is demonstrated for the heterogeneous reaction with a solid surface of potassium iodide. Coupling of the hydroxyl radical dosing system to a quantitative surface analysis system should help provide molecular level insight into detailed reaction mechanisms.

  4. Wenjia Zhang and Kara M. Kockelman CONGESTION PRICING'S LONG-RUN EFFECTS ON FIRM AND HOUSEHOLD1

    E-Print Network [OSTI]

    Kockelman, Kara M.

    . Pioneering examples include Singapore's Area Licensing Scheme in3 the early 1970s and its Electronic Road, and property taxes),15 and can influence land use decisions rather directly, since trip charges affect travel firms' labor costs,17 productivity, and customer access. Many experts believe that a tax on vehicle

  5. Apple Maturity Protocol Tests for apple flesh firmness and starch conversion are important tools for monitoring crop

    E-Print Network [OSTI]

    Apple Maturity Protocol Tests for apple flesh firmness and starch conversion are important tools dissolved. A magnetic stir plate with a plastic coated stir bar works well. Add 2.2 grams of iodine crystals the solution on the cut surface of an immature apple. Dip the cut surface for a second or two. It should stain

  6. Do Generation Firms in Restructured Electricity Markets Have Incentives to Support Social-Welfare-Improving Transmission Investments? *

    E-Print Network [OSTI]

    Oren, Shmuel S.

    Transmission Grid Study of the U.S. Department of Energy (Abraham, 2002) declares: "Growth in electricity of incentives for investment in the U.S. electricity transmission system are sparse. Moreover, noneDo Generation Firms in Restructured Electricity Markets Have Incentives to Support Social

  7. Policy on agreements with external consultants and firms 1 Current Revision: 01/2013 Policy on agreements with external consultants and

    E-Print Network [OSTI]

    Hammack, Richard

    Policy on agreements with external consultants and firms 1 Current Revision: 01/2013 Policy on agreements with external consultants and firms Policy Type: Local Responsible Office: Development and Alumni Relations Initial Policy Approved: 05/2009 Revised Policy Approved: 1/2013 Policy Statement

  8. Influence of heterogeneity on second-kind self-similar solutions...

    Office of Scientific and Technical Information (OSTI)

    Influence of heterogeneity on second-kind self-similar solutions for viscous gravity currents Citation Details In-Document Search Title: Influence of heterogeneity on second-kind...

  9. Analysis and optimization of heterogeneous materials using the variational asymptotic method for unit cell homogenization

    E-Print Network [OSTI]

    Yu, Wenbin

    1 Analysis and optimization of heterogeneous materials using the variational asymptotic method material and void are mixed artifi- cially. Keywords: Topology optimization; Homogenization method; Unit of the effective properties of periodically heterogeneous materials, within a periodic base cell. The sensitivities

  10. Enhancing marketing with engineering: Optimal product line design for heterogeneous markets

    E-Print Network [OSTI]

    Papalambros, Panos

    Enhancing marketing with engineering: Optimal product line design for heterogeneous markets Jeremy design and development often require a balance of technical and market tradeoffs. Quantitative methods: John H. Roberts Keywords: Product line design Heterogeneity Decomposition Analytical target cascading

  11. ENHANCING MARKETING WITH ENGINEERING: OPTIMAL PRODUCT LINE DESIGN FOR HETEROGENEOUS MARKETS

    E-Print Network [OSTI]

    Papalambros, Panos

    ENHANCING MARKETING WITH ENGINEERING: OPTIMAL PRODUCT LINE DESIGN FOR HETEROGENEOUS MARKETS Jeremy of Business. #12;- 1 - ENHANCING MARKETING WITH ENGINEERING: OPTIMAL PRODUCT LINE DESIGN FOR HETEROGENEOUS MARKETS ABSTRACT Successful product line design and development often requires balancing technical

  12. Modeling Biogeochemistry and Flow within Heterogeneous Formations in Variably-Saturated Media 

    E-Print Network [OSTI]

    Arora, Bhavna

    2012-10-19

    parameters. To evaluate the effect of heterogeneity on redox processes, repacked soil columns with homogeneous and heterogeneous (layered) profiles from soil cores collected at the Norman Landfill site, Oklahoma, USA were employed. Results indicate...

  13. 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

  14. Energy-Efficient Scheduling for Parallel Applications Running on Heterogeneous Clusters

    E-Print Network [OSTI]

    Qin, Xiao

    ), energy efficiency, and heterogeneities. Basically, processors, networks, disks, and cooling system1 Energy-Efficient Scheduling for Parallel Applications Running on Heterogeneous Clusters Ziliang 39406 mnijim@usm.edu § Department of Computer Science New Mexico Institute of Mining and Technology

  15. An Integrated Hardware-Software CosimulationEnvironment for Heterogeneous SystemsPrototyping

    E-Print Network [OSTI]

    Ha, Soonhoi

    An Integrated Hardware-Software CosimulationEnvironment for Heterogeneous Systems - In this paper, we present a hardware-software cosimulation environment for heterogeneoussystems of heterogeneous systems whose hardware and software components are interacting. Traditionally, the task has been

  16. RESEARCH ARTICLE Spatial spread of an alien tree species in a heterogeneous

    E-Print Network [OSTI]

    Petite, Samuel

    RESEARCH ARTICLE Spatial spread of an alien tree species in a heterogeneous forest landscape the observed invasion patterns of an alien tree species, Prunus serotina Ehrh., in a heterogeneous managed

  17. Micronesica 39(2): 297-314, 2007 Habitat Heterogeneity of Cycas micronesica Seed Chemistry

    E-Print Network [OSTI]

    Marler, Thomas E.

    to respond to environmental heterogeneity with phenotypic plasticity of secondary chemistry (Brenes- Arguedas & Coley 2005, Callaway et al. 2003). Phenotypic plasticity resulting from plant ontogeny and heterogeneous gametophyte toxins and determined that the most noxious in relation to neur

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

    SciTech Connect (OSTI)

    Somorjai , G.A.

    2007-06-11

    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.

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

    E-Print Network [OSTI]

    Somorjai Ed., G.A.

    2007-01-01

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

  20. Heterogeneity for Increasing Performance and Reliability of Self-Reconfigurable Multi-Robot Organisms

    E-Print Network [OSTI]

    Kernbach, S; Humza, R; Liedke, J; Popesku, S; Russo, S; Ranzani, T; Manfredi, L; Stefanini, C; Matthias, R; Schwarzer, Ch; Girault, B; Alschbach, P; Meister, E; Scholz, O

    2011-01-01

    Homogeneity and heterogeneity represent a well-known trade-off in the design of modular robot systems. This work addresses the heterogeneity concept, its rationales, design choices and performance evaluation. We introduce challenges for self-reconfigurable systems, show advances of mechatronic and software design of heterogeneous platforms and discuss experiments, which intend to demonstrate usability and performance of this system.

  1. Heterogeneous freezing of ice on atmospheric aerosols containing ash, soot, and soil

    E-Print Network [OSTI]

    Heterogeneous freezing of ice on atmospheric aerosols containing ash, soot, and soil Adam P. Fornea in the atmosphere often occurs through heterogeneous freezing processes in which an atmospheric aerosol acts, heterogeneous nucleation may occur through one of several freezing mechanisms, including contact and immersion

  2. 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

  3. Structural and energetic heterogeneity in protein folding. I. Theory Steven S. Plotkina)

    E-Print Network [OSTI]

    Plotkin, Steven S.

    Structural and energetic heterogeneity in protein folding. I. Theory Steven S. Plotkina) and Jose-energy functional methods to understand the effects of heterogeneity in the folding of a well-designed protein protein, both structural and energetic heterogeneity lower the thermodynamic barrier to folding. When

  4. Modeling Heterogeneous User Churn and Local Resilience of Unstructured P2P Networks

    E-Print Network [OSTI]

    Loguinov, Dmitri

    1 Modeling Heterogeneous User Churn and Local Resilience of Unstructured P2P Networks Zhongmei Yao on the resilience of un- structured P2P systems have not explicitly modeled heterogeneity of user churn (i, we introduce a generic model of heterogeneous user churn, derive the distribution of the various

  5. MpPVM : A Software System Non-Dedicated Heterogeneous Computing

    E-Print Network [OSTI]

    Sun, Xian-He

    MpPVM : A Software System for Non-Dedicated Heterogeneous Computing Kasidit Chanchio Xian-He Sun migration for PVM application programs in a non-dedicated heterogeneous computing environ- ment. New and promising performance of our process migration mechanism in the scalable non- dedicated heterogeneous

  6. Modeling Heterogeneity in Networks using Uncertainty Quantification Tools

    E-Print Network [OSTI]

    Rajendran, Karthikeyan; Siettos, Constantinos I; Laing, Carlo R; Kevrekidis, Ioannis G

    2015-01-01

    Using the dynamics of information propagation on a network as our illustrative example, we present and discuss a systematic approach to quantifying heterogeneity and its propagation that borrows established tools from Uncertainty Quantification. The crucial assumption underlying this mathematical and computational "technology transfer" is that the evolving states of the nodes in a network quickly become correlated with the corresponding node "identities": features of the nodes imparted by the network structure (e.g. the node degree, the node clustering coefficient). The node dynamics thus depend on heterogeneous (rather than uncertain) parameters, whose distribution over the network results from the network structure. Knowing these distributions allows us to obtain an efficient coarse-grained representation of the network state in terms of the expansion coefficients in suitable orthogonal polynomials. This representation is closely related to mathematical/computational tools for uncertainty quantification (th...

  7. Time traces of individual kinesin motors suggest functional heterogeneity

    E-Print Network [OSTI]

    Reddy, Babu J N; Xu, Jing; Mattson, Michelle; Arabi, Karim; Vershinin, Michael; Gross, Steven; Hyeon, Changbong

    2015-01-01

    Conventional analysis of in vitro assays of motor proteins rests on the assumption that all proteins with the same chemical composition function identically; however molecule-to-molecule variation is often seen even in well-controlled experiments. In an effort to obtain a statistically meaningful set of time traces that simultaneously avoid any experimental artifacts, we performed quantum-dot labeled kinesin experiments on both surface and levitated microtubules. Similar to glassy systems, we found that mean velocities of individual kinesin motors vary widely from one motor to another, the variation of which is greater than that expected from the stochastic variation of stepping times. In the presence of heterogeneity, an ensemble-averaged quantity such as diffusion constant or randomness parameter is ill-defined. We propose to analyze heterogeneous data from single molecule measurements by decomposing them into homogeneous subensembles.

  8. Computational Modeling of Heterogeneous Reactive Materials at the Mesoscale

    SciTech Connect (OSTI)

    BAER, MARVIN R.

    1999-09-22

    The mesoscopic processes of consolidation, deformation and reaction of shocked porous energetic materials are studied using shock physics analysis of impact on a collection of discrete ''crystals.'' Highly resolved three-dimensional CTH simulations indicate that rapid deformation occurs at material contact points causing large amplitude fluctuations of stress states with wavelengths of the order of several particle diameters. Localization of energy produces ''hot-spots'' due to shock focusing and plastic work near internal boundaries as material flows into interstitial regions. Numerical experiments indicate that ''hot-spots'' are strongly influenced by multiple crystal interactions. Chemical reaction processes also produce multiple wave structures associated with particle distribution effects. This study provides new insights into the micromechanical behavior of heterogeneous energetic materials strongly suggesting that initiation and sustained reaction of shocked heterogeneous materials involves states distinctly different from single jump state descriptions.

  9. Facilitated diffusion on mobile DNA: configurational traps and sequence heterogeneity

    E-Print Network [OSTI]

    C. A. Brackley; M. E. Cates; D. Marenduzzo

    2012-12-07

    We present Brownian dynamics simulations of the facilitated diffusion of a protein, modelled as a sphere with a binding site on its surface, along DNA, modelled as a semi-flexible polymer. We consider both the effect of DNA organisation in 3D, and of sequence heterogeneity. We find that in a network of DNA loops, as are thought to be present in bacterial DNA, the search process is very sensitive to the spatial location of the target within such loops. Therefore, specific genes might be repressed or promoted by changing the local topology of the genome. On the other hand, sequence heterogeneity creates traps which normally slow down facilitated diffusion. When suitably positioned, though, these traps can, surprisingly, render the search process much more efficient.

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

    E-Print Network [OSTI]

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

    2015-01-01

    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...

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

    SciTech Connect (OSTI)

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

    2013-10-15

    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.

  12. 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))

    1993-08-01

    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.

  13. A distributed scientific visualization paradigm for heterogeneous computer networks 

    E-Print Network [OSTI]

    Lenox, Mark Wayne

    1990-01-01

    hardware product called VX/MVX that uses multiple processors to perform visualization tasks [33]. It is not a heterogeneous distributed environment, however, in that all the processors are located within a single Sun workstation, as shown below in figure... pipeline, and minimization of supercomputer re- source demand are all design features of apE [17]. apE, which stands for animation production Environment, abstracts data in the form of the FLUX language [17]. FLUX has built in capabilities that make...

  14. Incorporating reservoir heterogeneity with geostatistics to investigate waterflood recoveries

    SciTech Connect (OSTI)

    Wolcott, D.S. ); Chopra, A.K. )

    1993-03-01

    This paper presents an investigation of infill drilling performance and reservoir continuity with geostatistics and a reservoir simulator. The geostatistical technique provides many possible realizations and realistic descriptions of reservoir heterogeneity. Correlation between recovery efficiency and thickness of individual sand subunits is shown. Additional recovery from infill drilling results from thin, discontinuous subunits. The technique may be applied to variations in continuity for other sandstone reservoirs.

  15. Modification of heterogeneous chemistry by complex substrate morphology

    SciTech Connect (OSTI)

    Henson, B.F.; Buelow, S.J.; Robinson, J.M.

    1998-12-31

    This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Chemistry in many environmental systems is determined at some stage by heterogeneous reaction with a surface. Typically the surface exists as a dispersion or matrix of particulate matter or pores, and a determination of the heterogeneous chemistry of the system must address the extent to which the complexity of the environmental surface affects the reaction rates. Reactions that are of current interest are the series of chlorine nitrate reactions important in polar ozone depletion. The authors have applied surface spectroscopic techniques developed at LANL to address the chemistry of chlorine nitrate reactions on porous nitric and sulfuric acid ice surfaces as a model study of the measurement of complex, heterogeneous reaction rates. The result of the study is an experimental determination of the surface coverage of one adsorbed reagent and a mechanism of reactivity based on the dependence of this coverage on temperature and vapor pressure. The resulting mechanism allows the first comprehensive modeling of chlorine nitrate reaction probability data from several laboratories.

  16. Heterogeneous composite bodies with isolated lenticular shaped cermet regions

    DOE Patents [OSTI]

    Sherman, Andrew J. (Cirtland Hills, OH)

    2009-12-22

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

    SciTech Connect (OSTI)

    Weissmann, Gary S

    2013-12-06

    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.

  18. Impact of localisation and R&D intensity on the firm performance of MNE subsidiaries investing in emerging markets: an empirical analysis of Taiwanese investment in China 

    E-Print Network [OSTI]

    Li, Chun-Sheng (Joseph)

    2009-01-01

    In this thesis, using Taiwanese companies investing in China as the sample, the impact of localisation and R&D intensity on the firm performance of MNE subsidiaries investing in an emerging market are examined. There has ...

  19. MRI of Heterogeneous Hydrogenation Reactions Using Parahydrogen Polarization

    SciTech Connect (OSTI)

    Burt, Scott R; Burt, Scott R.

    2008-06-25

    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.

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

    SciTech Connect (OSTI)

    Marnay, Chris

    2007-01-31

    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.

  1. Superconducting transition temperature in heterogeneous ferromagnet-superconductor systems 

    E-Print Network [OSTI]

    Pokrovsky, Valery L.; Wei, HD.

    2004-01-01

    ,2 , Chernogolovka o o orde e factor S PHYSICAL REVIEW B 69, 104530 ~2004! the magnetization in the FM film and the vorticity of vortices in the SC film alternate together. In this paper we study the SC transition in heterogeneous FM-SC systems including... the FSB, multilayers, and super- conducting film with a periodic array of magnetic dots ~SFMD!. For this purpose we extend the theory of spontane- ous SC-FM structures developed in the work17 to the case of multilayers. We demonstrate that in the FSB...

  2. A heterogeneous hierarchical architecture for real-time computing

    SciTech Connect (OSTI)

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

    1988-12-01

    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.

  3. Dynamical heterogeneities in an attraction driven colloidal glass

    E-Print Network [OSTI]

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

    2006-01-16

    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).

  4. Modeling micro-macro pedestrian counterflow in heterogeneous domains

    E-Print Network [OSTI]

    Joep Evers; Adrian Muntean

    2010-11-05

    We present a micro-macro strategy able to describe the dynamics of crowds in heterogeneous media. Herein we focus on the example of pedestrian counterflow. The main working tools include the use of mass and porosity measures together with their transport as well as suitable application of a version of Radon-Nikodym Theorem formulated for finite measures. Finally, we illustrate numerically our microscopic model and emphasize the effects produced by an implicitly defined social velocity. Keywords: Crowd dynamics; mass measures; porosity measure; social networks

  5. A Nth-order linear algorithm for extracting diffuse correlation spectroscopy blood flow indices in heterogeneous tissues

    SciTech Connect (OSTI)

    Shang, Yu; Yu, Guoqiang

    2014-09-29

    Conventional semi-infinite analytical solutions of correlation diffusion equation may lead to errors when calculating blood flow index (BFI) from diffuse correlation spectroscopy (DCS) measurements in tissues with irregular geometries. Very recently, we created an algorithm integrating a Nth-order linear model of autocorrelation function with the Monte Carlo simulation of photon migrations in homogenous tissues with arbitrary geometries for extraction of BFI (i.e., ?D{sub B}). The purpose of this study is to extend the capability of the Nth-order linear algorithm for extracting BFI in heterogeneous tissues with arbitrary geometries. The previous linear algorithm was modified to extract BFIs in different types of tissues simultaneously through utilizing DCS data at multiple source-detector separations. We compared the proposed linear algorithm with the semi-infinite homogenous solution in a computer model of adult head with heterogeneous tissue layers of scalp, skull, cerebrospinal fluid, and brain. To test the capability of the linear algorithm for extracting relative changes of cerebral blood flow (rCBF) in deep brain, we assigned ten levels of ?D{sub B} in the brain layer with a step decrement of 10% while maintaining ?D{sub B} values constant in other layers. Simulation results demonstrate the accuracy (errors?heterogeneous tissues with different levels of blood flow variations and noises.

  6. Effect of salt concentration on the stability of heterogeneous DNA

    E-Print Network [OSTI]

    Amar Singh; Navin Singh

    2015-09-28

    We study the role of cations on the stability of double stranded DNA (dsDNA) molecules.It is known that the two strands of double stranded DNA(dsDNA) have negative charge due to phosphate group. Cations in the form of salt in the solution, act as shielding agents thereby reducing the repulsion between these strands. We study several heterogeneous DNA molecules. We calculate the phase diagrams for DNA molecules in thermal as well as in force ensembles using Peyrard-Bishop-Dauxois (PBD) model. The dissociation and the stacking energies are the two most important factors that play an important role in the DNA stability. With suitable modifications in the model parameters we investigate the role of cation concentration on the stability of different heterogeneous DNA molecules. The objective of this work is to understand how these cations modify the strength of different pairs or bases along the strand. The phase diagram for the force ensemble case (a dsDNA is pulled from an end) is compared with the experimental results.

  7. Monodisperse Platinum and Rhodium Nanoparticles as Model Heterogeneous Catalysts

    SciTech Connect (OSTI)

    Coble, Inger M

    2008-08-15

    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.

  8. Static and dynamic heterogeneities in irreversible gels and colloidal gelation

    E-Print Network [OSTI]

    A. Coniglio; T. Abete; A. de Candia; E. Del Gado; A. Fierro

    2006-12-20

    We compare the slow dynamics of irreversible gels, colloidal gels, glasses and spin glasses by analyzing the behavior of the so called non-linear dynamical susceptibility, a quantity usually introduced to quantitatively characterize the dynamical heterogeneities. In glasses this quantity typically grows with the time, reaches a maximum and then decreases at large time, due to the transient nature of dynamical heterogeneities and to the absence of a diverging static correlation length. We have recently shown that in irreversible gels the dynamical susceptibility is instead an increasing function of the time, as in the case of spin glasses, and tends asymptotically to the mean cluster size. On the basis of molecular dynamics simulations, we here show that in colloidal gelation where clusters are not permanent, at very low temperature and volume fractions, i.e. when the lifetime of the bonds is much larger than the structural relaxation time, the non-linear susceptibility has a behavior similar to the one of the irreversible gel, followed, at higher volume fractions, by a crossover towards the behavior of glass forming liquids.

  9. The role of habitat heterogeneity in structuring the community of intertidal free-living marine nematodes

    E-Print Network [OSTI]

    Gingold, Ruth; Mundo-Ocampo, Manuel; Holovachov, Oleksandr; Rocha-Olivares, Axayácatl

    2010-01-01

    heterogeneity hypothesis (HHH), are building blocks ofHuston 1994). Finally, the HHH states that structurally4) in accordance with the HHH, a morphologically heteroge-

  10. 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

  11. Embracing diversity : improving performance for parallel storage systems built with heterogeneous disks

    E-Print Network [OSTI]

    Bruno, Gregory DuVall

    2008-01-01

    Figure I.2: Parallel Storage System Architecture FigureHeterogeneous Parallel Storage Systems . . . . . B. Modeldisks on a multimedia storage system with random data

  12. "Gender Fund" : creating a virtual mutual fund investing in firms with gender diversity

    E-Print Network [OSTI]

    Tomic, Maria

    2015-01-01

    "Companies with more women board directors experience higher financial performance" (Bottom Line report from Catalyst). This shows that gender diversity at the board level is a hot topic. In October 2014, Credit Suisse ...

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

    SciTech Connect (OSTI)

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

    2008-01-01

    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.

  14. Revealing spatially heterogeneous relaxation in a model nanocomposite

    E-Print Network [OSTI]

    Cheng, Shiwang; Carrillo, Jan-Michael Y; Bocharova, Vera; Sumpter, Bobby G; Schweizer, Kenneth S; Sokolov, Alexei P

    2015-01-01

    The detailed nature of spatially heterogeneous dynamics of glycerol-silica nanocomposites is unraveled by combining dielectric spectroscopy with atomistic simulation and statistical mechanical theory. Analysis of the spatial mobility gradient shows no 'glassy' layer, but the alpha relaxation time near the nanoparticle grows with cooling faster than the alpha relaxation time in the bulk, and is ~ 20 times longer at low temperatures. The interfacial layer thickness increases from ~ 1.8 nm at higher temperatures to ~ 3.5 nm upon cooling to near Tg. A real space microscopic description of the mobility gradient is constructed by synergistically combining high temperature atomistic simulation with theory. Our analysis suggests that the interfacial slowing down arises mainly due to an increase of the local cage scale barrier for activated hopping induced by enhanced packing and densification near the nanoparticle surface. The theory is employed to predict how local surface densification can be manipulated to control...

  15. Interface limited growth of heterogeneously nucleated ice in supercooled water

    E-Print Network [OSTI]

    Razvan A. Nistor; Thomas E. Markland; B. J. Berne

    2013-12-30

    Heterogeneous ice growth exhibits a maximum in freezing rate arising from the competition between kinetics and the thermodynamic driving force between the solid and liquid states. Here, we use molecular dynamics simulations to elucidate the atomistic details of this competition, focusing on water properties in the interfacial region along the secondary prismatic direction. The crystal growth velocity is maximized when the efficiency of converting interfacial water molecules to ice, collectively known as the attachment kinetics, is greatest. We find water molecules that contact the intermediate ice layer in concave regions along the atomistically roughened surface are more likely to freeze directly. The increased roughening of the solid surface at large undercoolings consequently plays an important limiting role on the rate of ice growth, as water molecules are unable to integrate into increasingly deeper surface pockets. These results provide insights into the molecular mechanisms for self-assembly of solid phases that are important in many biological and atmospheric processes.

  16. 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)

    2002-01-01

    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.

  17. 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

    2014-01-01

    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...

  18. Linkage heterogeneity among 59 Dutch hereditary breast cancer families

    SciTech Connect (OSTI)

    Cornelis, R.S.; Vliet, M. van; Leeuwen, I. van

    1994-09-01

    We have investigated 59 Dutch kindreds with at least three first-degree relatives with breast and/or ovarian cancer for linkage to BRCA1 on 17q12-q21, using at least 4 microsatellite markers flanking BRCA1 on either side. Assuming no heterogeneity, the overall multipoint lod score in this group of families was -7.59. A marked clustering of lod scores >0.5 was observed among the 13 families with a mean age of onset lower than 45 (total lod score: +3.36). Among the 8 kindreds with a mean age of onset lower than 45 and {ge}3 cases diagnosed under 45, the lod score was +4.43. Interestingly, most of the evidence against linkage was found in 17 families with a mean age of onset between 45 and 54 (total lod score of -8.72). It was estimated that 28% of the breast-only families might be caused by BRCA1. Over the 16 breast-ovarian cancer families a lod score of -3.78 was obtained under homogeneity. The highest lod score was +0.57, assuming heterogeneity with 33% of the families being linked to BRCA1. One family gave a multipoint lod score of -2.01 and thereby satisfies the conventional criterion of an unlinked family. Our results support the conclusions from earlier work by others, namely that BRCA1 predisposes particularly to early-onset breast cancer. The proportion of breast-ovarian cancer families we found linked to BRCA1 is much lower than that found by the Breast Cancer Linkage Consortium. This might be caused by the single unlinked family against an insufficient number of families able to give conclusive positive lod scores.

  19. 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.

    1997-08-01

    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.

  20. 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

  1. Generic Library Extension in a Heterogeneous Environment Cosmin Oancea Stephen M. Watt

    E-Print Network [OSTI]

    Watt, Stephen M.

    Generic Library Extension in a Heterogeneous Environment Cosmin Oancea Stephen M. Watt Department,watt}@csd.uwo.ca Abstract We examine what is necessary to allow generic libraries to be used naturally in a heterogeneous environment. Our approach is to treat a library as a software component and to view the problem as one

  2. 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

  3. Practical tools for survival analysis with heterogeneity-induced competing risks

    E-Print Network [OSTI]

    Applebaum, David

    Practical tools for survival analysis with heterogeneity-induced competing risks J. van Baardewijka-intuitive inferences. Keywords: survival analysis; heterogeneity; competing risks 1 #12;Contents 1 Introduction 3 2 to the survival analysis literature we refer to the textbooks [1, 2, 3, 4]. The competing risk problem

  4. ELSEVIER Tectonophysics 279 (1997) 327350 Continental-scale rheological heterogeneities and complex intraplate

    E-Print Network [OSTI]

    Tommasi, Andrea

    1997-01-01

    displayed different geotherms and lithospheric thicknesses, and therefore contrasted rheological behaviours these heterogeneities may affect strain localization and the distribution of deformation regimes and vertical strain in vertical and/or rotational deformation. Such a heterogeneous strain distribution may induce contrasted

  5. Mapping pipeline skeletons onto heterogeneous platforms Anne Benoit and Yves Robert

    E-Print Network [OSTI]

    Benoit, Anne

    Mapping pipeline skeletons onto heterogeneous platforms Anne Benoit and Yves Robert LIP, ENS Lyon mapping of the application. In this paper, we discuss the mapping of pipeline skeletons onto different, Fully Heterogeneous platforms. We assume that a pipeline stage must be mapped on a single processor

  6. Pointer Warping in Heterogeneous Multi-Monitor Environments Hrvoje Benko Steven Feiner

    E-Print Network [OSTI]

    Benko, Hrvoje

    Pointer Warping in Heterogeneous Multi-Monitor Environments Hrvoje Benko Steven Feiner Department and visual size alone. For mouse operation in a highly heterogeneous multi-monitor environment, all our in a homogeneous multi-monitor environment and showed significant improvements when traversing two or more monitor

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

    E-Print Network [OSTI]

    Vironmental Sciences Department, BrookhaVen National Laboratory, Upton, New York 11973 ReceiVed: July 5, 2000; In Final are analyzed using classical nucleation theory to derive the free-energy barrier to nucleation, the size heterogeneous nuclei. Heterogeneous crystallization represents an alternative mechanism for phase transitions

  8. Utilizing interfaces: One-step forward for rational design of heterogeneous catalysts

    SciTech Connect (OSTI)

    Kim H. Y.

    2013-06-20

    As far as heterogeneous catalysts are a composite material, physicochemical properties of the interfaces between individual components should be extensively studied for rational design of catalysts with desired properties. Here, I will present recent computational achievements in following three heterogeneous catalysts where the interface between composing materials plays a critical role

  9. Soil Biology & Biochemistry 39 (2007) 21382149 Heterogeneity of soil nutrients and subsurface biota

    E-Print Network [OSTI]

    Neher, Deborah A.

    2007-01-01

    Author's personal copy Soil Biology & Biochemistry 39 (2007) 2138­2149 Heterogeneity of soil Laboratory, 999-W, Aiken, SC 29808, USA f Department of Plant & Soil Science, University of Vermont, Hills to have a highly heterogeneous distribution of nutrients and soil biota, with greater concentrations

  10. Cost-aware Cooperative Resource Provisioning for Heterogeneous Workloads in Data Centers

    E-Print Network [OSTI]

    Shi, Weisong

    1 Cost-aware Cooperative Resource Provisioning for Heterogeneous Workloads in Data Centers Jianfeng-scale data centers or cloud systems. In this paper, we argue for a new twist on the classical resource provisioning problem: heterogeneous workloads are a fact of life in large-scale data centers, and current

  11. GUI Migration across Heterogeneous Java Profiles Candy Wong, Hao-hua Chu, Masaji Katagiri

    E-Print Network [OSTI]

    Chu, Hao-hua

    GUI Migration across Heterogeneous Java Profiles Candy Wong, Hao-hua Chu, Masaji Katagiri Do-platform graphical user interface (GUI) development tools do not support migrate-able GUIs as they do not consider that can be migrated across heterogeneous Java profiles. In this paper, we will focus on two major problems

  12. A General Criterion for Liquefaction in Granular Layers with Heterogeneous Pore Pressure

    E-Print Network [OSTI]

    Einat, Aharonov

    A General Criterion for Liquefaction in Granular Layers with Heterogeneous Pore Pressure Liran that liquefaction oc- curs when the pore pressure within the layer becomes equal to the applied normal stress pressure is spatially heterogeneous and it is not clear what measurement of pore pressure should be used

  13. Fractures in heterogeneous two-dimensional systems Antonio Politi1,2,

    E-Print Network [OSTI]

    Politi, Antonio

    Fractures in heterogeneous two-dimensional systems Antonio Politi1,2, * and Maria Zei2,3,4, 1 disorder is used as a testing ground for fracture behavior in heterogeneous materials in strain and different breaking thresholds. We study the strain range where the fracture progressively develops from

  14. Modeling electroporation of the non-treated and vacuum impregnated heterogeneous tissue of spinach leaves

    E-Print Network [OSTI]

    Ljubljana, University of

    Modeling electroporation of the non-treated and vacuum impregnated heterogeneous tissue of spinach a , Damijan Miklavcic b a Food Technology, Engineering and Nutrition, Lund University, PO Box 124, SE-221 00 Vacuum impregnation Uniform electroporation of the heterogeneous structure of spinach leaf cross section

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

    E-Print Network [OSTI]

    Stryk, Oskar von

    Cooperation 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 and a wheeled robot with largely complementing and some competing capabilities. By combining two strongly

  16. 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

  17. Modeling Heterogeneous User Churn and Local Resilience of Unstructured P2P Networks

    E-Print Network [OSTI]

    Yao, Zhongmei

    1 Modeling Heterogeneous User Churn and Local Resilience of Unstructured P2P Networks Zhongmei Yao of user churn (i.e., difference in online behavior) or the impact of in-degree on system resilience. To overcome these limitations, we introduce a generic model of heterogeneous user churn, derive

  18. A Bayesian framework for combining heterogeneous data sources for gene function prediction

    E-Print Network [OSTI]

    Botstein, David

    ). How- ever, these studies combine the information from different sources in a semimanual and heuristicA Bayesian framework for combining heterogeneous data sources for gene function prediction (in that uses formal Bayesian reasoning to inte- grate heterogeneous types of high-throughput biological data

  19. Modeling the heterogeneous hydraulic properties of faults using constraints from reservoir-induced

    E-Print Network [OSTI]

    Cowie, Patience

    Modeling the heterogeneous hydraulic properties of faults using constraints from reservoir the damage zone surrounding faults. The Ac¸u dam is a 34 m high earth-filled dam constructed in 1983 pattern of earthquake clustering and migration that suggests heterogeneous fault zone hydraulic properties

  20. A super-aggregation strategy for multi-homed mobile hosts with heterogeneous wireless interfaces

    E-Print Network [OSTI]

    Sivakumar, Raghupathy

    A super-aggregation strategy for multi-homed mobile hosts with heterogeneous wireless interfaces Abstract Most mobile devices today are equipped with multiple and heterogeneous wireless interfaces. In this paper we ask the following question: What is the best approach to leverage the multiple interfaces

  1. A General Self-adaptive Task Scheduling System for Non-dedicated Heterogeneous Computing

    E-Print Network [OSTI]

    Sun, Xian-He

    1 A General Self-adaptive Task Scheduling System for Non-dedicated Heterogeneous Computing Ming Wu outperforms current systems in scheduling large applications in a non- dedicated heterogeneous environment. 1 are for dedicated systems. By dedicated, we refer resources in the system serve the application in a dedicated

  2. State Multinationals: The Impact of State Ownership on International Diversification and Firm Performance 

    E-Print Network [OSTI]

    He, Xiaoming

    2011-10-21

    of hierarchical linear models indicate that the state multinational, first, does have characteristics that are different from its parents (i.e., the SOE and the MNE) and thus is considered a hybrid organizational form. Second, state ownership may improve the level...

  3. 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.

    1997-08-01

    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.

  4. The Enterprise Level Roadmap

    E-Print Network [OSTI]

    Lean Advancement Initiative

    2000-01-01

    The Enterprise Level Roadmap is part of a Transition-To-Lean Guide, a three volume set of materials designed to help a user navigate through the Roadmap at increasingly deeper levels of detail.

  5. Accounting for Taste Heterogeneity in Purchase Channel Intention Modeling: An Example from Northern California for Book Purchases

    E-Print Network [OSTI]

    Tang, Wei; Mokhtarian, Patricia L

    2009-01-01

    pp 31-55 www.jocm.org.uk Accounting for Taste Heterogeneitya book, identifying and accounting for taste heterogeneity.

  6. 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

    2013-01-01

    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.

  7. Liquid level detector

    DOE Patents [OSTI]

    Grasso, A.P.

    1984-02-21

    A liquid level detector for low pressure boilers. A boiler tank, from which vapor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

  8. Liquid level detector

    DOE Patents [OSTI]

    Grasso, Albert P. (Vernon, CT)

    1986-01-01

    A liquid level detector for low pressure boilers. A boiler tank, from which apor, such as steam, normally exits via a main vent, is provided with a vertical side tube connected to the tank at the desired low liquid level. When the liquid level falls to the level of the side tube vapor escapes therethrough causing heating of a temperature sensitive device located in the side tube, which, for example, may activate a liquid supply means for adding liquid to the boiler tank. High liquid level in the boiler tank blocks entry of vapor into the side tube, allowing the temperature sensitive device to cool, for example, to ambient temperature.

  9. 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)

    2009-05-01

    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.

  10. Aggregate Model for Heterogeneous Thermostatically Controlled Loads with Demand Response

    SciTech Connect (OSTI)

    Zhang, Wei; Kalsi, Karanjit; Fuller, Jason C.; Elizondo, Marcelo A.; Chassin, David P.

    2012-07-22

    Due to the potentially large number of Distributed Energy Resources (DERs) – demand response, distributed generation, distributed storage - that are expected to be deployed, it is impractical to use detailed models of these resources when integrated with the transmission system. Being able to accurately estimate the fast transients caused by demand response is especially important to analyze the stability of the system under different demand response strategies. On the other hand, a less complex model is more amenable to design feedback control strategies for the population of devices to provide ancillary services. The main contribution of this paper is to develop aggregated models for a heterogeneous population of Thermostatic Controlled Loads (TCLs) to accurately capture their collective behavior under demand response and other time varying effects of the system. The aggregated model efficiently includes statistical information of the population and accounts for a second order effect necessary to accurately capture the collective dynamic behavior. The developed aggregated models are validated against simulations of thousands of detailed building models using GridLAB-D (an open source distribution simulation software) under both steady state and severe dynamic conditions caused due to temperature set point changes.

  11. Application of solid ash based catalysts in heterogeneous catalysis

    SciTech Connect (OSTI)

    Shaobin Wang

    2008-10-01

    Solid wastes, fly ash, and bottom ash are generated from coal and biomass combustion. Fly ash is mainly composed of various metal oxides and possesses higher thermal stability. Utilization of fly ash for other industrial applications provides a cost-effective and environmentally friendly way of recycling this solid waste, significantly reducing its environmental effects. On the one hand, due to the higher stability of its major component, aluminosilicates, fly ash could be employed as catalyst support by impregnation of other active components for various reactions. On the other hand, other chemical compounds in fly ash such as Fe{sub 2}O{sub 3} could also provide an active component making fly ash a catalyst for some reactions. In this paper, physicochemical properties of fly ash and its applications for heterogeneous catalysis as a catalyst support or catalyst in a variety of catalytic reactions were reviewed. Fly-ash-supported catalysts have shown good catalytic activities for H{sub 2} production, deSOx, deNOx, hydrocarbon oxidation, and hydrocracking, which are comparable to commercially used catalysts. As a catalyst itself, fly ash can also be effective for gas-phase oxidation of volatile organic compounds, aqueous-phase oxidation of organics, solid plastic pyrolysis, and solvent-free organic synthesis. 107 refs., 4 figs., 2 tabs.

  12. Supporting Dynamic Spectrum Access in Heterogeneous LTE+ Networks

    SciTech Connect (OSTI)

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

    2012-08-01

    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.

  13. Classification of Message Spreading in a Heterogeneous Social Network

    E-Print Network [OSTI]

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

    2015-01-01

    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.

  14. Tiltmeter leveling mechanism

    DOE Patents [OSTI]

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

    2002-01-01

    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.

  15. Streptophyte Algae and the Origin of Land Plants Revisited Using Heterogeneous Models with Three New Algal

    E-Print Network [OSTI]

    Davis, Charles

    Letter Streptophyte Algae and the Origin of Land Plants Revisited Using Heterogeneous Models algae, but different lineages of streptophytes have been suggested to be the sister group of land plants chloroplast genomes from streptophyte algae: Coleochaetae orbicularis (Coleochaetales), Nitella hookeri

  16. Predicting clinical response to anticancer drugs using an ex vivo platform that captures tumour heterogeneity

    E-Print Network [OSTI]

    Majumder, Biswanath

    Predicting clinical response to anticancer drugs remains a major challenge in cancer treatment. Emerging reports indicate that the tumour microenvironment and heterogeneity can limit the predictive power of current ...

  17. 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 ...

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

    E-Print Network [OSTI]

    Fu, Xin, 1973-

    2003-01-01

    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 ...

  19. Dispersion relations for acoustic waves in heterogeneous multi-layered structures contacting with

    E-Print Network [OSTI]

    Turova, Varvara

    Dispersion relations for acoustic waves in heterogeneous multi-layered structures contacting application for the computation of the velocity of acoustic waves excited in complicated multi: Multi-layered structures, Surface acoustic waves, Dispersion relations, Homogenization, Biosensor

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

    E-Print Network [OSTI]

    Mantz, Yves André, 1974-

    2002-01-01

    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 ...

  1. 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

  2. Elucidating the organic-OMS interface and its implications for heterogeneous catalysts 

    E-Print Network [OSTI]

    Wang, Qingqing

    2012-07-16

    Organic – ordered mesoporous silica (OMS) hybrid materials have attracted great interest due to their potential applications for gas separations, and heterogeneous catalysis. Amine-functionalized OMS materials are active in a variety of base...

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

    SciTech Connect (OSTI)

    Imhof, Matthias G.; Castle, James W.

    2003-03-12

    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.

  4. Heterogeneous Reductive Isomerization Reaction Using Catalytic Pd/C and H2

    E-Print Network [OSTI]

    Stoltz, Brian M.

    , N.; Okada, M. Curr. Org. Synth. 2005, 2, 21-38. (h) Tsuji, J. J. Synth. Org. Chem. Jpn. 1999, 57 to examine the unusual reactivity of the heterogeneous palladium system. Herein, we detail our exploration

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

    E-Print Network [OSTI]

    Jin, Xing

    2009-05-15

    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...

  6. PerCon: A Personal Digital Library for Heterogeneous Data Management and Analysis 

    E-Print Network [OSTI]

    Park, Su Inn

    2015-03-31

    Systems are needed to support access to and analysis of larger and more heterogeneous scientific datasets. Users need support in the location, organization, analysis, and interpretation of data to support their current ...

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

    E-Print Network [OSTI]

    Al Muhaidib, Abdulaziz

    2013-01-01

    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 ...

  8. Integration of distributed and heterogeneous information for public-private policy analyses

    E-Print Network [OSTI]

    Cheng, David Su-Kai, 1978-

    2004-01-01

    Databases and analysis tools currently being used to study carbon dioxide capture and storage (CCS) options are managed by diverse organizations and are heterogeneous in format. Tools to study the various components of a ...

  9. Decarbonising the English residential sector: modelling policies, technologies and behaviour within a heterogeneous building stock

    E-Print Network [OSTI]

    Kelly, Scott

    2013-04-16

    propensity to consume more energy are also more likely to have higher energy efficiency. Internal dwelling temperature is one of the most important parameters for explaining residential energy demand over a heterogeneous building stock. Yet bottom up...

  10. 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 ...

  11. Heterogeneous seepage at the Nopal I natural analogue site, Chihuahua, Mexico

    E-Print Network [OSTI]

    Dobson, P.F.

    2014-01-01

    Heterogeneous seepage at the Nopal I natural analogue site,in an adit at the Nopal I uranium mine in Chihuahua, Mexico,of radionuclides from the Nopal I uranium deposit into the

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

    E-Print Network [OSTI]

    Mahajan, Vinay Subhash

    2009-01-01

    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 ...

  13. 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

  14. 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

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

    ScienceCinema (OSTI)

    Xu, Xun [BGI

    2013-02-11

    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.

  16. ALLIANCE: An Architecture for Fault Tolerant, Cooperative Control of Heterogeneous Mobile Robots

    E-Print Network [OSTI]

    Parker, Lynne E.

    ALLIANCE: An Architecture for Fault Tolerant, Cooperative Control of Heterogeneous Mobile Robots ALLIANCE, that utilizes adaptive action selection to achieve fault toler- ant cooperative control in robot demonstration. These experiments illustrate the ability of ALLIANCE to achieve adaptive, fault

  17. Surfkin: A program to solve transient and steady state heterogeneous reaction kinetics

    SciTech Connect (OSTI)

    COLTRIN,MICHAEL E.; WIXOM,RYAN R.; DANDY,DAVID S.

    2000-05-01

    Heterogeneous chemical reactions occurring at a gas/surface interface are fundamental in a variety of important applications, such as combustion, catalysis, chemical vapor deposition and plasma processing. Detailed simulation of these processes may involve complex, coupled fluid flow, heat transfer, gas-phase chemistry, in addition to heterogeneous reaction chemistry. This report documents the Surfkin program, which simulates the kinetics of heterogeneous chemical reactions. The program is designed for use with the Chemkin and Surface Chemkin (heterogeneous chemistry) programs. It calculates time-dependent or steady state surface site fractions and bulk-species production/destruction rates. The surface temperature may be specified as a function of time to simulate a temperature-programmed desorption experiment, for example. This report serves as a user's manual for the program, explaining the required input and format of the output. Two detailed example problems are included to further illustrate the use of this program.

  18. Stable and scalable congestion control for high-speed heterogeneous networks 

    E-Print Network [OSTI]

    Zhang, Yueping

    2008-10-10

    For any congestion control mechanisms, the most fundamental design objectives are stability and scalability. However, achieving both properties are very challenging in such a heterogeneous environment as the Internet. ...

  19. Geometric Multigrid Methods for Flow Problems in Highly Heterogeneous Porous Media 

    E-Print Network [OSTI]

    Mao, Youli

    2014-06-05

    In this dissertation, we develop geometric multigrid methods for the finite element approximation of flow problems (e:g:, Stokes, Darcy and Brinkman models) in highly heterogeneous porous media. Our method is based on ...

  20. Fetal functional imaging portrays heterogeneous development of emerging human brain networks

    E-Print Network [OSTI]

    Schwartz, Ernst

    The functional connectivity architecture of the adult human brain enables complex cognitive processes, and exhibits a remarkably complex structure shared across individuals. We are only beginning to understand its heterogeneous ...

  1. Heterogeneous nuclear ribonucleoprotein A1 post-transcriptionally regulates Drp1 expression in neuroblastoma cells

    E-Print Network [OSTI]

    Park, So Jung; Lee, Heejin; Jo, Doo Sin; Jo, Yoon Kyung; Shin, Ji Hyun; Kim, Han Byeol; Seo, Hae Mi; Rubinsztein, David C.; Koh, Jae-Young; Lee, Eun Kyung; Cho, Dong-Hyung

    2015-10-28

    are known to modulate complex mitochondrial dynamics. However, the posttranscriptional regulation of Drp1 remains poorly understood. Here, we show that the heterogeneous nuclear ribonucleoprotein A1 (hnRNP A1) regulates Drp1 expression at the post...

  2. Abstract--The successful commercialization of any new product depends to a degree on the ability of a firm to match

    E-Print Network [OSTI]

    Graves, Stephen C.

    is the Abraham J Siegel Professor of Management Science at the Massachusetts Institute of Technology, Cambridge Engineering and Computer Science Department, Massachusetts Institute of Technology, Cambridge, MA 02139 USA (e-mail: xinhuang@ mit.edu). process; thus, the micro-fluidic manufacturing firms must plan their capacities

  3. 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

  4. Real-Time Android RealTime DSP AB is a consultant firm, supplying expertise within the areas embedded systems and

    E-Print Network [OSTI]

    Svenningsson, Josef

    Real-Time Android RealTime DSP AB is a consultant firm, supplying expertise within the areas The Android platform is widely used for smartphones running all sorts of applications. Though most-time demands. Since Android is based on a Linux kernel, which is not made for real-time applications, you

  5. 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

  6. 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

  7. HYPERSONIC BUCKSHOT: ASTROPHYSICAL JETS AS HETEROGENEOUS COLLIMATED PLASMOIDS

    SciTech Connect (OSTI)

    Yirak, Kristopher; Frank, Adam; Cunningham, Andrew J.; Mitran, Sorin

    2009-04-20

    Herbig-Haro jets are commonly thought of as homogeneous beams of plasma traveling at hypersonic velocities. Structure within jet beams is often attributed to periodic or 'pulsed' variations of conditions at the jet source. Simulations based on this scenario result in knots extending across the jet diameter. Observations and recent high energy density laboratory experiments shed new light on structures below this scale and indicate they may be important for understanding the fundamentals of jet dynamics. In this paper, we offer an alternative to 'pulsed' models of protostellar jets. Using direct numerical simulations we explore the possibility that jets are chains of subradial clumps propagating through a moving interclump medium. Our models explore an idealization of this scenario by injecting small (r < r {sub jet}), dense ({rho}>{rho}{sub jet}) spheres embedded in an otherwise smooth interclump jet flow. The spheres are initialized with velocities differing from the jet velocity by {approx}15%. We find that the consequences of shifting from homogeneous to heterogeneous flows are significant as clumps interact with each other and with the interclump medium in a variety of ways. Structures which mimic what is expected from pulsed-jet models can form, as can be previously unseen, 'subradial' behaviors including backward facing bow shocks and off-axis working surfaces. While these small-scale structures have not been seen before in simulation studies, they are found in high-resolution jet observations. We discuss implications of our simulations for the interpretation of protostellar jets with regard to characterization of knots by a 'lifetime' or 'velocity history' approach as well as linking observed structures with central engines which produce the jets.

  8. Hypersonic Buckshot: Astrophysical Jets as Heterogeneous Collimated Plasmoids

    E-Print Network [OSTI]

    Kristopher Yirak; Adam Frank; Andrew J. Cunningham; Sorin Mitran

    2008-06-05

    Herbig-Haro (HH) jets are commonly thought of as homogeneous beams of plasma traveling at hypersonic velocities. Structure within jet beams is often attributed to periodic or ``pulsed'' variations of conditions at the jet source. Simulations based on this scenario result in knots extending across the jet diameter. Observations and recent high energy density laboratory experiments shed new light on structures below this scale and indicate they may be important for understanding the fundamentals of jet dynamics. In this paper we offer an alternative to ``pulsed'' models of protostellar jets. Using direct numerical simulations we explore the possibility that jets are chains of sub-radial clumps propagating through a moving inter-clump medium. Our models explore an idealization of this scenario by injecting small ($rjet}$), dense ($\\rho>\\rho_{jet}$) spheres embedded in an otherwise smooth inter-clump jet flow. The spheres are initialized with velocities differing from the jet velocity by $\\sim15$%. We find the consequences of shifting from homogeneous to heterogeneous flows are significant as clumps interact with each other and with the inter-clump medium in a variety of ways. Structures which mimic what is expected from pulsed-jet models can form, as can previously unseen ``sub-radial'' behaviors including backward facing bow shocks and off-axis working surfaces. While these small-scale structures have not been seen before in simulation studies, they are found in high resolution jet observations. We discuss implications of our simulations for the interpretation of protostellar jets with regard to characterization of knots by a ``lifetime'' or ``velocity history'' approach as well as linking observed structures with central engines which produce the jets.

  9. Structure, Thermodynamics and Kinetics of Chemically Heterogeneous Interfaces

    E-Print Network [OSTI]

    Palafox Hernandez, Jesus Pablo

    2011-08-31

    the closest packing orientations [(111) FCC and (110) BCC] developed prefreezing (complete wetting). A detailed atomic-level characterization of the structure, energetics and transport properties of the planar Cu/Pb solid-liquid interface in equilibrium...

  10. Surface heterogeneity impacts on boundary layer dynamics via energy balance partitioning

    E-Print Network [OSTI]

    Brunsell, Nathaniel A.; Mechem, David B.; Anderson, M. C.

    2011-04-11

    vegetation types and phenological patterns be examined for altering the conversion of net radi- ation into turbulent heat fluxes and the potential impacts this may have on boundary layer dynamics. Our results are important for understanding the mechanis- tic... stream_size 62188 stream_content_type text/plain stream_name Brunsell_2011_Surface-heterogeneity-impacts.pdf.txt stream_source_info Brunsell_2011_Surface-heterogeneity-impacts.pdf.txt Content-Encoding UTF-8 Content-Type text...

  11. Precision liquid level sensor

    DOE Patents [OSTI]

    Field, Michael E. (Albuquerque, NM); Sullivan, William H. (Albuquerque, NM)

    1985-01-01

    A precision liquid level sensor utilizes a balanced R. F. bridge, each arm including an air dielectric line. Changes in liquid level along one air dielectric line imbalance the bridge and create a voltage which is directly measurable across the bridge.

  12. Precision liquid level sensor

    DOE Patents [OSTI]

    Field, M.E.; Sullivan, W.H.

    1985-01-29

    A precision liquid level sensor utilizes a balanced R. F. bridge, each arm including an air dielectric line. Changes in liquid level along one air dielectric line imbalance the bridge and create a voltage which is directly measurable across the bridge. 2 figs.

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

    SciTech Connect (OSTI)

    Lin, Ying; Wu, Qishi; Zhu, Mengxia; Rao, Nageswara S

    2009-04-01

    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.

  14. Architecture of the Multi-Modal Organizational Research and Production Heterogeneous Network (MORPHnet)

    SciTech Connect (OSTI)

    Aiken, R.J.; Carlson, R.A.; Foster, I.T. [and others

    1997-01-01

    The research and education (R&E) community requires persistent and scaleable network infrastructure to concurrently support production and research applications as well as network research. In the past, the R&E community has relied on supporting parallel network and end-node infrastructures, which can be very expensive and inefficient for network service managers and application programmers. The grand challenge in networking is to provide support for multiple, concurrent, multi-layer views of the network for the applications and the network researchers, and to satisfy the sometimes conflicting requirements of both while ensuring one type of traffic does not adversely affect the other. Internet and telecommunications service providers will also benefit from a multi-modal infrastructure, which can provide smoother transitions to new technologies and allow for testing of these technologies with real user traffic while they are still in the pre-production mode. The authors proposed approach requires the use of as much of the same network and end system infrastructure as possible to reduce the costs needed to support both classes of activities (i.e., production and research). Breaking the infrastructure into segments and objects (e.g., routers, switches, multiplexors, circuits, paths, etc.) gives the capability to dynamically construct and configure the virtual active networks to address these requirements. These capabilities must be supported at the campus, regional, and wide-area network levels to allow for collaboration by geographically dispersed groups. The Multi-Modal Organizational Research and Production Heterogeneous Network (MORPHnet) described in this report is an initial architecture and framework designed to identify and support the capabilities needed for the proposed combined infrastructure and to address related research issues.

  15. NON-LINEAR FUNCTIONAL APPROXIMATION OF HETEROGENEOUS DYNAMICS

    E-Print Network [OSTI]

    in a latent variable model designed to account for both switching multi-scaling regimes and cascade system or resolution levels. We aim to design ad hoc approximation instruments dealing with a particularly complex in improving the volatility feature detection power. Then we show the good performance of greedy approxima

  16. A New Equivalence Theory Method for Treating Doubly Heterogeneous Fuel - I. Theory

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

    Williams, Mark L.; Lee, Deokjung; Choi, Sooyoung

    2015-03-04

    A new methodology has been developed to treat resonance self-shielding in doubly heterogeneous very high temperature gas-cooled reactor systems in which the fuel compact region of a reactor lattice consists of small fuel grains dispersed in a graphite matrix. This new method first homogenizes the fuel grain and matrix materials using an analytically derived disadvantage factor from a two-region problem with equivalence theory and intermediate resonance method. This disadvantage factor accounts for spatial self-shielding effects inside each grain within the framework of an infinite array of grains. Then the homogenized fuel compact is self-shielded using a Bondarenko method to accountmore »for interactions between the fuel compact regions in the fuel lattice. In the final form of the equations for actual implementations, the double-heterogeneity effects are accounted for by simply using a modified definition of a background cross section, which includes geometry parameters and cross sections for both the grain and fuel compact regions. With the new method, the doubly heterogeneous resonance self-shielding effect can be treated easily even with legacy codes programmed only for a singly heterogeneous system by simple modifications in the background cross section for resonance integral interpolations. This paper presents a detailed derivation of the new method and a sensitivity study of double-heterogeneity parameters introduced during the derivation. The implementation of the method and verification results for various test cases are presented in the companion paper.« less

  17. A New Equivalence Theory Method for Treating Doubly Heterogeneous Fuel - I. Theory

    SciTech Connect (OSTI)

    Williams, Mark L.; Lee, Deokjung; Choi, Sooyoung

    2015-03-04

    A new methodology has been developed to treat resonance self-shielding in doubly heterogeneous very high temperature gas-cooled reactor systems in which the fuel compact region of a reactor lattice consists of small fuel grains dispersed in a graphite matrix. This new method first homogenizes the fuel grain and matrix materials using an analytically derived disadvantage factor from a two-region problem with equivalence theory and intermediate resonance method. This disadvantage factor accounts for spatial self-shielding effects inside each grain within the framework of an infinite array of grains. Then the homogenized fuel compact is self-shielded using a Bondarenko method to account for interactions between the fuel compact regions in the fuel lattice. In the final form of the equations for actual implementations, the double-heterogeneity effects are accounted for by simply using a modified definition of a background cross section, which includes geometry parameters and cross sections for both the grain and fuel compact regions. With the new method, the doubly heterogeneous resonance self-shielding effect can be treated easily even with legacy codes programmed only for a singly heterogeneous system by simple modifications in the background cross section for resonance integral interpolations. This paper presents a detailed derivation of the new method and a sensitivity study of double-heterogeneity parameters introduced during the derivation. The implementation of the method and verification results for various test cases are presented in the companion paper.

  18. A numerical homogenization method for heterogeneous, anisotropic elastic media based on multiscale theory

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

    Gao, Kai; Chung, Eric T.; Gibson, Richard L.; Fu, Shubin; Efendiev, Yalchin

    2015-06-05

    The development of reliable methods for upscaling fine scale models of elastic media has long been an important topic for rock physics and applied seismology. Several effective medium theories have been developed to provide elastic parameters for materials such as finely layered media or randomly oriented or aligned fractures. In such cases, the analytic solutions for upscaled properties can be used for accurate prediction of wave propagation. However, such theories cannot be applied directly to homogenize elastic media with more complex, arbitrary spatial heterogeneity. We therefore propose a numerical homogenization algorithm based on multiscale finite element methods for simulating elasticmore »wave propagation in heterogeneous, anisotropic elastic media. Specifically, our method used multiscale basis functions obtained from a local linear elasticity problem with appropriately defined boundary conditions. Homogenized, effective medium parameters were then computed using these basis functions, and the approach applied a numerical discretization that is similar to the rotated staggered-grid finite difference scheme. Comparisons of the results from our method and from conventional, analytical approaches for finely layered media showed that the homogenization reliably estimated elastic parameters for this simple geometry. Additional tests examined anisotropic models with arbitrary spatial heterogeneity where the average size of the heterogeneities ranged from several centimeters to several meters, and the ratio between the dominant wavelength and the average size of the arbitrary heterogeneities ranged from 10 to 100. Comparisons to finite-difference simulations proved that the numerical homogenization was equally accurate for these complex cases.« less

  19. Arthropod and plant responses to resource availability and heterogeneity

    E-Print Network [OSTI]

    Khavin, Irene Samantha

    2008-03-26

    of their interactions with plants and with other trophic levels. In addition to being interesting for academic reasons, they are also important in their own right. In some systems, including some grasslands, insects eat more plant biomass each year than do... biomass, plant species richness, and percent cover of each species. We found that plant biomass increased monotonically with increasing nitrogen availability, while plant species richness exhibited a unimodal response to nitrogen manipulations...

  20. Empirical Essays on the Efficiency of Heterogeneous Good Auction 

    E-Print Network [OSTI]

    Martin, Thomas A., IV

    2010-01-14

    congestion is likely to occur. If a major power plant, such as one of the two nuclear power plants in Texas fails, zonal congestion would likely follow as power flows into either region to restore balance. Other reasons are weather related. High temperatures... type in which ERCOT orders specific power units to change levels of production. This type of congestion occurs outside of market mechanisms and is not relevant to this research. 13 be the connections between these zones. ERCOT divides power plants...

  1. Ultrasonic liquid level detector

    DOE Patents [OSTI]

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

    2010-09-28

    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.

  2. Large Enhancement in the Heterogeneous Oxidation Rate of Organic Aerosols by Hydroxyl Radicals in the Presence of Nitric Oxide.

    E-Print Network [OSTI]

    Richards-Henderson, NK; Goldstein, AH; Wilson, KR

    2015-01-01

    Heterogeneous Reaction of Hydroxyl Radicals with Sub-Micronof Organic Aerosols by Hydroxyl Radicals in the Presence ofin an aerosol exposed to hydroxyl radicals (OH) is thought

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

    E-Print Network [OSTI]

    Patrick B. Warren

    2007-04-05

    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.

  4. LEVEL 01 FLOOR LEVEL 1 / GROUND FLOOR / SUPPORT SERVICES BUILDING

    E-Print Network [OSTI]

    Lennard, William N.

    LEVEL 01 FLOOR LEVEL 1 / GROUND FLOOR / SUPPORT SERVICES BUILDING 05/02/2012ACCESSIBILITY WESTERN FLOOR PLAN SUPPORT SERVICES BUILDING Level 2 Lower building Rm.2350 1393 WESTERN ROAD N6G -1G9 UPDATE DRAWN #12;LEVEL 02 FLOOR LEVEL 2 / SECOND FLOOR / SUPPORT SERVICES BUILDING 05/02/2012ACCESSIBILITY

  5. 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.

    2010-04-29

    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.

  6. Analytic Coarse-Mesh Finite-Difference Method Generalized for Heterogeneous Multidimensional Two-Group Diffusion Calculations

    SciTech Connect (OSTI)

    Garcia-Herranz, Nuria [Universidad de Nacional de Educacion a Distancia (Spain); Cabellos, Oscar [Polytechnic University of Madrid (Spain); Aragones, Jose M. [Polytechnic University of Madrid (Spain); Ahnert, Carol [Polytechnic University of Madrid (Spain)

    2003-05-15

    In order to take into account in a more effective and accurate way the intranodal heterogeneities in coarse-mesh finite-difference (CMFD) methods, a new equivalent parameter generation methodology has been developed and tested. This methodology accounts for the dependence of the nodal homogeneized two-group cross sections and nodal coupling factors, with interface flux discontinuity (IFD) factors that account for heterogeneities on the flux-spectrum and burnup intranodal distributions as well as on neighbor effects.The methodology has been implemented in an analytic CMFD method, rigorously obtained for homogeneous nodes with transverse leakage and generalized now for heterogeneous nodes by including IFD heterogeneity factors. When intranodal mesh node heterogeneity vanishes, the heterogeneous solution tends to the analytic homogeneous nodal solution. On the other hand, when intranodal heterogeneity increases, a high accuracy is maintained since the linear and nonlinear feedbacks on equivalent parameters have been shown to be as a very effective way of accounting for heterogeneity effects in two-group multidimensional coarse-mesh diffusion calculations.

  7. 660 IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS, VOL. 8, NO. 6, DECEMBER 2000 Heterogeneous Architecture Models for

    E-Print Network [OSTI]

    Wills, Scott

    Heterogeneous Architecture Models for Interconnect-Motivated System Design Sek Meng Chai, Member, IEEE, Tarek M. Taha, D. Scott Wills, Senior Member, IEEE, and James D. Meindl, Life Fellow, IEEE Abstract in the design process. This paper presents a set of heterogeneous architectural models that combines

  8. 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

  9. 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

  10. 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

  11. Geophysical Prospecting doi: 10.1111/j.1365-2478.2010.00909.x Influence of background heterogeneity on traveltime shifts

    E-Print Network [OSTI]

    Tsvankin, Ilya

    by the 3D stress-induced velocity field around a compacting reservoir. Application of this method from interfaces above the reservoir. We also study compaction-induced stress/strain and traveltime heterogeneity. Key words: Compacting reservoirs, Excess stress, Heterogeneous media, Time-lapse seismic

  12. Kinetics of Heterogeneous Ice Nucleation on the Surfaces of Mineral Dust Cores Inserted into Aqueous Ammonium Sulfate Particles

    E-Print Network [OSTI]

    Kinetics of Heterogeneous Ice Nucleation on the Surfaces of Mineral Dust Cores Inserted and absorb- ing terrestrial upwelling infrared radiation in the longwave.1 Unlike lower altitude clouds detailed know- ledge of both homogeneous and heterogeneous ice nucleation kinetics in the liquid phase.6

  13. Heterogeneous IPv6 Infrastructure for Smart Energy Efficient Leila Ben Saad

    E-Print Network [OSTI]

    Boyer, Edmond

    Heterogeneous IPv6 Infrastructure for Smart Energy Efficient Building Leila Ben Saad CITI INSA infrastructure, PLC is mandatory in several place of the smart-grid metering and command infrastructure. Also PLC constrained networking devices. Moreover, low energy PLC, will be able to provide smart grid monitoring

  14. Human impacts on leaf economics in heterogeneous landscapes: the effect of harvesting non-timber forest

    E-Print Network [OSTI]

    Sack, Lawren

    Human impacts on leaf economics in heterogeneous landscapes: the effect of harvesting non tested the effect of foliage harvest by indigenous Fulani people on leaf stoichiometry and eco- nomics with world-wide trends in leaf economics. The effect of foliage harvest on foliar nutrient concentrations

  15. An Approach for Describing Heterogeneous Web Resources in a Unified Schema Ran Tang and Ying Zou

    E-Print Network [OSTI]

    Zou, Ying

    1 An Approach for Describing Heterogeneous Web Resources in a Unified Schema Ran Tang and Ying Zou.zou}@queensu.ca Abstract-- Web resources can be located and accessed through the Internet to provide information and functionalities to users. However, different types of web resources (e.g., Web Services, RESTful services

  16. SLA-based virtual machine management for heterogeneous workloads in a cloud datacenter

    E-Print Network [OSTI]

    Buyya, Rajkumar

    SLA-based virtual machine management for heterogeneous workloads in a cloud datacenter Saurabh it does not guarantee application performance. Thus, currently cloud datacenter providers either do of datacenter resources. In this paper, we tackle the resource allocation problem within a datacenter that runs

  17. SLA-Based Resource Provisioning for Heterogeneous Workloads in a Virtualized Cloud

    E-Print Network [OSTI]

    Buyya, Rajkumar

    SLA-Based Resource Provisioning for Heterogeneous Workloads in a Virtualized Cloud Datacenter applications with different performance re- quirements. Currently, cloud datacenter providers either do. In this paper, we tackle the resource allocation problem within a datacenter that runs different type

  18. Perturbation-based moment equation approach for flow in heterogeneous porous media: applicability range

    E-Print Network [OSTI]

    Zhang, Dongxiao

    with the uncertainty brought about by incomplete knowledge of the reservoir properties. Stochastic models of reservoir equations; Uncertainty analysis; Statistical moments; Monte Carlo simulation; Heterogeneous porous media range and analysis of high-order terms Liyong Li a , Hamdi A. Tchelepi a,*, Dongxiao Zhang b a Chevron

  19. A computational study of chemically heterogeneous particles: patchy vs. uniform particles in shear flow

    E-Print Network [OSTI]

    Marina Bendersky; Maria M. Santore; Jeffrey M. Davis

    2015-06-18

    The adhesion of flowing particles and biological cells over fixed collecting surfaces is vitally important in diverse situations and potentially controlled by small-scale surface heterogeneity on the particle. Differences in the behavior of patchy particles (flowing over uniform collectors) relative to the reverse case of uniform particles (flowing over patchy collectors) are quantified. Because a particle rotates more slowly than it translates in the shear field near a collecting surface, the effective interaction time of a patch on a particle is larger than that of a patch on the collector, suggesting distinct particle capture tendencies in each case. This paper presents a new computational approach to simulate the near-surface motion (rotation and translation) of particles having nanoscale surface heterogeneities flowing over uniform collectors. Small amounts of ~10 nm cationic patches randomly distributed on a net-negative particle surface produced spatially varying DLVO interactions that were computed via the Grid Surface Integration (GSI) technique and then combined with hydrodynamic forces in a mobility tensor formulation. Statistical analysis of simulated trajectories revealed fewer extrema in the fluctuating particle-collector separation of heterogeneous particles, compared with the reverse system geometry of uniform particles flowing past a heterogeneous fixed surface. Additionally, the patchy particles were captured to a lesser extent on uniform surfaces compared with the case of uniform particles flowing above patchy collectors. Such behavior was dependent on ionic strength, with the greatest differences obtained near a Debye length of $\\kappa^{-1} = 4$ nm for the $2a = 500$ nm simulated particles.

  20. @neurIST Chronic Disease Management through Integration of Heterogeneous Data

    E-Print Network [OSTI]

    Frangi, Alejandro

    the context of High Performance Computing. The @neurIST Project and the architecture of the system have been of Sheffield, Sheffield, UK k Information & Communications Technology Department, Universitat Pompeu Fabra by bringing together heterogeneous data, computing and complex processing services. The architecture

  1. Impact of Node Heterogeneity in ZigBee Mesh Network Routing

    E-Print Network [OSTI]

    Chen, Ling-Jyh

    Impact of Node Heterogeneity in ZigBee Mesh Network Routing Nia-Chiang Liang1, Ping-Chieh Chen1-WPAN standard, the ZigBee standard has been proposed to interconnect simple, low rate, and battery powered wireless devices. The deploy- ment of ZigBee networks is expected to facilitate numerous applications

  2. Effective hydraulic parameters for steady state vertical flow in heterogeneous soils

    E-Print Network [OSTI]

    Mohanty, Binayak P.

    Effective hydraulic parameters for steady state vertical flow in heterogeneous soils Jianting Zhu August 2003. [1] In hydroclimate and land-atmospheric interaction models, effective hydraulic properties are needed at large grid scales. In this study, the effective soil hydraulic parameters of the areally

  3. MODELING CELL HETEROGENEITY: FROM SINGLE-CELL VARIATIONS TO MIXED CELLS

    E-Print Network [OSTI]

    Raphael, Ben J.

    MODELING CELL HETEROGENEITY: FROM SINGLE-CELL VARIATIONS TO MIXED CELLS ERIC BATCHELOR Center of Health Bethesda, MD 20894, USA Email: wojtowda@ncbi.nlm.nih.gov Emerging technologies such as single cell gene expression analysis and single cell genome sequencing provide an unprecedented opportunity

  4. Design and Implementation of a Parallel Heterogeneous Algorithm for Hyperspectral Image Analysis Using HeteroMPI

    E-Print Network [OSTI]

    Plaza, Antonio J.

    Design and Implementation of a Parallel Heterogeneous Algorithm for Hyperspectral Image Analysis The development of efficient techniques for transforming the massive volume of remotely sensed hyperspectral data a promising cost-effective solution expected to play a major role in many on-going and planned remote sensing

  5. Simulation of diffusion and trapping in digitized heterogeneous media David A. Coke@ and Salvatore Torquatob)

    E-Print Network [OSTI]

    Torquato, Salvatore

    microscopy," scanning tunneling electron microscopy," and synchrotron based tomography,t3 it is possibleSimulation of diffusion and trapping in digitized heterogeneous media David A. Coke@ and Salvatore of a Brownian particle diffusing among a, digitized lattice-based domain of traps. Following the first

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

    E-Print Network [OSTI]

    Diaconescu, Ada

    A Holonic Control Architecture for a Heterogeneous Multi-Objective Smart Micro-Grid Sylvain Frey--Designing the control infrastructure of future "smart" power grids is a challenging task. Such grids will integrate challenges. Keywords-holon; micro-grid; controller integration; I. INTRODUCTION Over the next decades

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

    SciTech Connect (OSTI)

    Imhof, Matthias G.; Castle, James W.

    2003-03-12

    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. Performed a theoretical and numerical study to examine which subsurface features the surface seismic method actually resolves.

  8. Heterogeneous Modulation for Trading-off Energy Balancing with Bandwidth Efficiency in Hierarchical Sensor Networks

    E-Print Network [OSTI]

    Pedram, Massoud

    Heterogeneous Modulation for Trading-off Energy Balancing with Bandwidth Efficiency in Hierarchical modulation scheme and report its impact on the spatial distribution of energy dissipation and the resulting due to inherent trade-offs in power efficiency and bandwidth efficiency of the different modulation

  9. A one-dimensional model of vertical gas plume migration through a heterogeneous porous medium

    E-Print Network [OSTI]

    Patzek, Tadeusz W.

    A one-dimensional model of vertical gas plume migration through a heterogeneous porous medium Buoyancy Countercurrent flow Plume migration a b s t r a c t This work is motivated by the growing interest or inadvertently created conduits in the cap rock may result in a gas leakage from primary storage. Even

  10. Resource Pooling in Network Virtualization and Heterogeneous Scenarios using Stochastic Petri Nets

    E-Print Network [OSTI]

    Yanikomeroglu, Halim

    Resource Pooling in Network Virtualization and Heterogeneous Scenarios using Stochastic Petri Nets University, Canada {rs,halim}@sce.carleton.ca Abstract--Wireless cellular networks are undergoing severe by the network. While operators traditionally over-provisioned their own separate network capacity in order

  11. (Conference on Diffusion in Heterogeneous Media and Related Topics) 6 March (Thursday) 2014

    E-Print Network [OSTI]

    Nakamura, Shu

    transfer on the random real trees will be derived by estimating heat kernels of the diffusions (Conference on Diffusion in Heterogeneous Media and Related Topics) Room 002 6 March (Thursday) 2014 10:00-10:10: Opening 10:10-11:00: J. Cheng (Fudan Univ.) "The Mathematical Model

  12. The heterogeneous motility of the Lyme disease spirochete in gelatin mimics dissemination

    E-Print Network [OSTI]

    Wolgemuth, Charles

    The heterogeneous motility of the Lyme disease spirochete in gelatin mimics dissemination through encounter in vivo. Here we show that the motility of Borrelia in gelatin ma- trices in vitro resembles and the rheological proper- ties of the gelatin, which cannot be accounted for by recent the- oretical predictions

  13. Statistics of Earthquake Stress Drops on a Heterogeneous Fault in an Elastic Half-Space

    E-Print Network [OSTI]

    Ben-Zion, Yehuda

    -organized heterogeneous initial stress distributions at the times of earthquake failure lead to stress drops drops of large events provides a rationale for reducing the statistical estimates of potential ground an earth- quake rupture eq controls the seismic radiation from the source region and, hence, the generated

  14. OSS tools in a heterogeneous environment for embedded systems modelling: an analysis of adoptions of XMI

    E-Print Network [OSTI]

    Scacchi, Walt

    39 OSS tools in a heterogeneous environment for embedded systems modelling: an analysis information between tools ­ whether in a tool chain, for legacy reasons or because of the natural of XMI interchange for supporting OSS tool adoption to complement other tools in an embedded systems

  15. Mapping A Common Geoscienti c Object Model to Heterogeneous Spatial Data Repositories

    E-Print Network [OSTI]

    Nittel, Silvia

    stored using domain-speci c le format libraries, maps and raster data stored in le-based GIS systemsMapping A Common Geoscienti c Object Model to Heterogeneous Spatial Data Repositories Silvia Nittel Department University of California, Los Angeles University of California, Los Angeles University

  16. Travel{time calculation in heterogeneous 3-D structures * Lud ek Klime s

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Travel{time calculation in heterogeneous 3-D structures * Lud#20;ek Klime#20;s Department-mail: psencik@earn.cvut.cz Summary The selection of the numerical method to calculate travel times depends on the nature of the travel times, on the complexity and computer representation of the seismic model

  17. View Based Integration of Heterogeneous Web Service Registries--the Case of VISR

    E-Print Network [OSTI]

    Dustdar, Schahram

    View Based Integration of Heterogeneous Web Service Registries--the Case of VISR Schahram Dustdar efforts in the Web service area, several dif- ferent incompatible Web service registry implementations distributed Web service registries. In addition, the creation of specialized Web service registries leads

  18. Computationally Efficient Clustering of Power Supplies in Heterogeneous Real Time Systems

    E-Print Network [OSTI]

    Friedman, Eby G.

    functionally diverse systems with multiple power domains. To provide a high quality power delivery system an integrated part of the power management system. To maintain a high quality power supply despite increasingComputationally Efficient Clustering of Power Supplies in Heterogeneous Real Time Systems Inna

  19. An Open Framework to Deploy Heterogeneous Wireless Testbeds for Cyber-Physical Systems

    E-Print Network [OSTI]

    Carloni, Luca

    in a commercial parking lot and an indoor university building instrumentation. Using the two deployments, we deployment of heterogeneous wireless testbeds for Cyber-Physical Systems (CPS). The testbed architecture the architecture, the framework properties, and the hardware resources that are necessary to deploy an experimental

  20. Modular software architecture for flexible reservation mechanisms on heterogeneous Michal Sojka,a

    E-Print Network [OSTI]

    Lipari, Giuseppe

    counting, monitoring of parking lots, etc.). In industrial con- trol, image recognition applicationsModular software architecture for flexible reservation mechanisms on heterogeneous resources Michal. However, it is not easy to design basic infrastructure services that allow for an easy access

  1. Late Fusion of Compact Composite Descriptors for Retrieval from Heterogeneous Image Databases

    E-Print Network [OSTI]

    Arampatzis, Avi

    Late Fusion of Compact Composite Descriptors for Retrieval from Heterogeneous Image Databases-search. While early fusion has been common, late fu- sion still remains an under-explored possibility. Compact University of Thrace Xanthi, Greece schatzic@ee.duth.gr, avi@ee.duth.gr ABSTRACT Compact composite

  2. Seismic waveeld calculation for laterally heterogeneous whole earth models using the pseudospectral method

    E-Print Network [OSTI]

    Furumura, Takashi

    coordinates using the pseudospectral method (PSM). The PSM is an attractive time- domain technique that uses the heterogeneity in the model. Synthetic seismograms obtained by the PSM calculation are compared with those agreement. The PSM method is illustrated by constructing the seismic P^SV wave¢eld for strongly

  3. The Y-chromosome landscape of the Philippines: extensive heterogeneity and varying genetic affinities

    E-Print Network [OSTI]

    Xu, Shuhua

    ARTICLE The Y-chromosome landscape of the Philippines: extensive heterogeneity and varying genetic, Mark Stoneking2 and Maria Corazon A De Ungria*,1 The Philippines exhibits a rich diversity of people history for Filipino groups, with varying roles for migrations from outside the Philippines, genetic drift

  4. Energy-efficient Management of Heterogeneous Wireless Sensor Markus Anwander, Gerald Wagenknecht, Torsten Braun

    E-Print Network [OSTI]

    Braun, Torsten

    Energy-efficient Management of Heterogeneous Wireless Sensor Networks Markus Anwander, Gerald as an appropriate operating system to support dynamic and energy-efficient reconfiguration as well as code updates management tasks are: monitoring the WSN, configuration of the WSN, code updates and managing sensor data

  5. Effective Unsaturated Hydraulic Conductivity for Computing One-Dimensional Flow in Heterogeneous Porous Media

    E-Print Network [OSTI]

    Effective Unsaturated Hydraulic Conductivity for Computing One-Dimensional Flow in Heterogeneous-dimensional unsaturated flow in vertically stratified porous media are examined. Saturated hydraulic conductivity and the alpha parameter of the exponential hydraulic conductivity function were assumed to vary from soil layer

  6. Electro-osmotic flow and mixing in heterogeneous microchannels Jin-bai Zhang,1,4

    E-Print Network [OSTI]

    Liu, Feng

    Electro-osmotic flow and mixing in heterogeneous microchannels Jin-bai Zhang,1,4 Guo-wei He,1 September 2005; published 12 May 2006 Analytical and numerical studies of secondary electro-osmotic flow EOF which could exhibit the complex flow patterns that offer op- portunities for rapid mixing. Electro-osmotic

  7. A Heterogeneous Environment for Computational Prototyping and Simulation Based Design of

    E-Print Network [OSTI]

    Dutton, Robert W.

    process simulation. 1. Introduction Micro-Electro-Mechanical Systems MEMS o er dramatic new functional1 A Heterogeneous Environment for Computational Prototyping and Simulation Based Design of MEMS 94305-4075 Abstract This paper gives an overview of MEMS simulation and the computational re- quirements

  8. A Heterogeneous Environment for Computational Prototyping and Simulation Based Design of

    E-Print Network [OSTI]

    Dutton, Robert W.

    process simulation. 1. Introduction Micro­Electro­Mechanical Systems (MEMS) offer dramatic new functional1 A Heterogeneous Environment for Computational Prototyping and Simulation Based Design of MEMS 94305­4075 Abstract This paper gives an overview of MEMS simulation and the computational re­ quirements

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

    E-Print Network [OSTI]

    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

  10. OSCAR Parallelizing Compiler and API for Real-time Low Power Heterogeneous Multicores

    E-Print Network [OSTI]

    Kasahara, Hironori

    OSCAR Parallelizing Compiler and API for Real-time Low Power Heterogeneous Multicores Akihiro, this paper describes OSCAR par- allelizing compiler which bridges a gap between programmers and hetero- geneous multicores. In particular, this paper describes the compilation framework based on OSCAR compiler

  11. Information Brokers: Gathering Information from Heterogeneous Information Sources Richard Fikes, Adam Farquhar, Wanda Pratt

    E-Print Network [OSTI]

    Pratt, Vaughan

    Information Brokers: Gathering Information from Heterogeneous Information Sources Richard Fikes,adam_farquhar,pratt}@ksl.stanford.edu Abstract The Internet provides dramatic new opportunities for gather­ ing information from multiple technical problems for the information­seeking client, including finding the information sources relevant

  12. Risk analysis via heterogeneous models of SCADA interconnecting Power Grids and Telco Networks

    E-Print Network [OSTI]

    Tronci, Enrico

    Risk analysis via heterogeneous models of SCADA interconnecting Power Grids and Telco Networks A and Data Acquisition (SCADA) systems has led to an improvement of Power Grid operations and functionalities power grid services are increasingly depending upon the adequate functionality of SCADA system which

  13. Aortic Valve Turning Over a New Leaf(let) in Endothelial Phenotypic Heterogeneity

    E-Print Network [OSTI]

    Simmons, Craig A.

    Aortic Valve Turning Over a New Leaf(let) in Endothelial Phenotypic Heterogeneity Peter F. Davies, Anthony G. Passerini, Craig A. Simmons A ortic valve diseases are debilitating cardiovascular disorders the longevity of replacement valves and to improve tissue engineered substitutes,1 the underlying mech- anisms

  14. Pronounced zonal heterogeneity in Eocene southern high-latitude sea surface temperatures

    E-Print Network [OSTI]

    amplification of green- house warming. It is also possible, however, that the available high, was largely responsible for the observed SST gradient. These results indicate that very warm SSTs, in excess- house climates. The pronounced zonal SST heterogeneity evident in the Eocene cautions against inferring

  15. A Cluster-based Energy Balancing Scheme in Heterogeneous Wireless Sensor Networks

    E-Print Network [OSTI]

    Bölöni, Ladislau L

    A Cluster-based Energy Balancing Scheme in Heterogeneous Wireless Sensor Networks Jing Ai, Damla Unbalanced energy consumption is an inherent problem in wireless sensor networks, and it is largely of energy reserve and wireless communication ability. We transform the flat communication in- frastructure

  16. Thermomechanics of a heterogeneous fluctuating chain Tianxiang Su, Prashant K. Purohit.

    E-Print Network [OSTI]

    Purohit, Prashant

    these methods in that we allow the bending modulus Kb(s) of our fluctuating rod to vary as an arbitrary function In this paper we present a theory to efficiently calculate the thermo-mechanical properties of fluctuating through Monte Carlo simulations. Finally, we consider a special heterogeneous chain with only two bending

  17. 3D heterogeneous systems are a key to the next generation of electronics

    E-Print Network [OSTI]

    Rogers, John A.

    3D heterogeneous systems are a key to the next generation of electronics Researchers of substrate, including lightweight, flexible plastic sheets. Circuits built in this way offer electrical-based approaches to electronics. The invention of the transistor was considered by many to be one of the greatest

  18. Green Move: a platform for highly configurable, heterogeneous electric vehicle sharing

    E-Print Network [OSTI]

    Cugola, Gianpaolo

    Green Move: a platform for highly configurable, heterogeneous electric vehicle sharing Andrea G the spreading of electric vehicles, in particular for what concerns the high upfront costs of the vehicles benefits. I. INTRODUCTION Electric vehicle sharing has the potential to provide a solution to many

  19. Thermal, Power, and Co-location Aware Resource Allocation in Heterogeneous High Performance Computing Systems

    E-Print Network [OSTI]

    Maciejewski, Anthony A. "Tony"

    --The rapid increase in power consumption of high performance computing (HPC) systems has led to an increase interference I. INTRODUCTION The power consumption of high-performance comput- ing (HPC) systems and dataThermal, Power, and Co-location Aware Resource Allocation in Heterogeneous High Performance

  20. High-throughput imaging of heterogeneous cell organelles with an X-ray laser

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Hantke, Max, F.

    Preprocessed detector images that were used for the paper "High-throughput imaging of heterogeneous cell organelles with an X-ray laser". The CXI file contains the entire recorded data - including both hits and blanks. It also includes down-sampled images and LCLS machine parameters. Additionally, the Cheetah configuration file is attached that was used to create the pre-processed data.

  1. International Journal of Advanced Robotic Systems Heterogeneous Context-Aware Robots

    E-Print Network [OSTI]

    Veloso, Manuela M.

    International Journal of Advanced Robotic Systems Heterogeneous Context-Aware Robots Providing Turck1 1 Department of Information Technology, Ghent University - IBBT, Ghent, Belgium 2 Robotics Group the original work is properly cited. Abstract Existing robot guides offer a tour of a building

  2. High-throughput imaging of heterogeneous cell organelles with an X-ray laser

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Hantke, Max, F.

    2014-11-17

    Preprocessed detector images that were used for the paper "High-throughput imaging of heterogeneous cell organelles with an X-ray laser". The CXI file contains the entire recorded data - including both hits and blanks. It also includes down-sampled images and LCLS machine parameters. Additionally, the Cheetah configuration file is attached that was used to create the pre-processed data.

  3. Pulse Stabilization in a Strongly Heterogeneous Layered Pawel Lewicki, Robert Burridge

    E-Print Network [OSTI]

    Papanicolaou, George C.

    Pulse Stabilization in a Strongly Heterogeneous Layered Medium Pawel Lewicki, Robert Burridge ). A pulse with O(ffl) wavelength enters the slab at one end. It travels coherently through the slab­moving frame of reference the pulse stabilizes to its mean as ffl tends to zero. It broadens as it travels

  4. Pulse Stabilization in a Strongly Heterogeneous Layered Pawel Lewicki, Robert Burridge

    E-Print Network [OSTI]

    Papanicolaou, George C.

    Pulse Stabilization in a Strongly Heterogeneous Layered Medium Pawel Lewicki, Robert Burridge a slab of nite thickness. The medium parameters vary randomly with correlation length of O 2. A pulse-moving frame of reference the pulse stabilizes to its mean as tends to zero. It broadens as it travels

  5. Modeling Alveolar Volume Changes During Periodic Breathing in Heterogeneously Ventilated Lungs

    E-Print Network [OSTI]

    Jeavons, Peter

    Modeling Alveolar Volume Changes During Periodic Breathing in Heterogeneously Ventilated Lungs SARA-uniform breathing pattern for a lung with an inhomogeneous gas distribution, such as that observed in some subjects of irregular breathing caused by small, poorly ventilated regions of the lung. Presented here is an extension

  6. Thermal-Aware Performance Optimization in Power Constrained Heterogeneous Data Centers

    E-Print Network [OSTI]

    Maciejewski, Anthony A.

    Thermal-Aware Performance Optimization in Power Constrained Heterogeneous Data Centers Abdulla M of data centers has been increasing at a rapid rate over the past few years. Many of these data centers experience physical limitations on the power needed to run the data center. This paper attempts to maximize

  7. Solving Energy-Latency Dilemma: Task Allocation for Parallel Applications in Heterogeneous Embedded Systems

    E-Print Network [OSTI]

    Xie, Tao

    . Assign ti to pv 16. Update the schedule on node pv 17. Compute the energy consumed by ti on pvSolving Energy-Latency Dilemma: Task Allocation for Parallel Applications in Heterogeneous Embedded with an objective of energy-saving and short- latency. A novel task allocation strategy, or BEATA (Balanced Energy

  8. Chemical Sinks of Organic Aerosol: Kinetics and Products of the Heterogeneous Oxidation of Erythritol and Levoglucosan

    E-Print Network [OSTI]

    Kessler, Sean Herbert

    The heterogeneous oxidation of pure erythritol (C[subscript 4]H[subscript 10]O[subscript 4]) and levoglucosan (C[subscript 6]H[subscript 10]O[subscript 5]) particles was studied in order to evaluate the effects of atmospheric ...

  9. Conditional moment analysis of steady state unsaturated flow in bounded, randomly heterogeneous soils

    E-Print Network [OSTI]

    Tartakovsky, Daniel M.

    soils Zhiming Lu and Shlomo P. Neuman Department of Hydrology and Water Resources, University of Arizona 26 April 2002. [1] We consider steady state unsaturated flow in bounded, randomly heterogeneous soils that the solution may remain asymptotic for values of sY 2 as large as 2. INDEX TERMS: 1866 Hydrology: Soil moisture

  10. Heterogeneous networks do not promote cooperation when humans play a Prisoner's Dilemma

    E-Print Network [OSTI]

    Sánchez, Angel "Anxo"

    Heterogeneous networks do not promote cooperation when humans play a Prisoner's Dilemma Carlos in large systems. We have performed the largest experiments to date with humans playing a spatial Prisoner an evolutionary conundrum (1, 2). This conundrum is because many of our interactions can be framed as Prisoner

  11. Disorder-induced dynamics in a pair of coupled heterogeneous phase oscillator Carlo R. Laing

    E-Print Network [OSTI]

    Laing, Carlo R.

    Disorder-induced dynamics in a pair of coupled heterogeneous phase oscillator networks Carlo R investigate the new dynamics induced by this "frozen" dis- order. We find that for sufficiently high disorder, the differential equations governing the dynam- ics of the macroscopic order parameters of the network show chaotic

  12. Dynamic Load Partitioning Strategies for Managing Data of Space and Time Heterogeneity in Parallel

    E-Print Network [OSTI]

    Li, Xiaolin "Andy"

    Dynamic Load Partitioning Strategies for Managing Data of Space and Time Heterogeneity in Parallel}@caip.rutgers.edu Abstract. This paper presents the design and experimental evaluation of two dynamic load partitioning and synchronization in this structure. This paper presents the design and experimental evaluation of dynamic load par

  13. 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 Sharifi Ayse Kivilcim Coskun Tajana Simunic Rosing CSE Department, University of California, San Diego ECE Department Boston University CSE Department, University of California, San Diego shervin@ucsd.edu acoskun

  14. Analysis of the finite element heterogeneous multiscale method for nonlinear elliptic homogenization problems.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Analysis of the finite element heterogeneous multiscale method for nonlinear elliptic homogenization problems. Assyr Abdulle and Gilles Vilmart September 28, 2012 Abstract An analysis of the finite finite elements. Op- timal a-priori error estimates are obtained for the H1 and L2 norms, error bounds

  15. Theory of traveltime shifts around compacting reservoirs: 3D solutions for heterogeneous anisotropic media

    E-Print Network [OSTI]

    Tsvankin, Ilya

    Theory of traveltime shifts around compacting reservoirs: 3D solutions for heterogeneous and cannot be applied to traveltime shifts measured on prestack seismic data. We give an analytic 3D of traveltimes that accounts not only for the velocity changes but also for 3D deformation of reflectors

  16. Deployment and Evaluation of a 802.15.4 Heterogeneous Network

    E-Print Network [OSTI]

    Akribopoulos, Orestis; Koninis, Christos; Papavasileiou, Ioannis; Chatzigiannakis, Ioannis

    2011-01-01

    In this technical report we present a throughput performance analysis on a heterogeneous wireless sensor network which consists of 4 different sensor devices (TelosB, SunSPOT, Arduino, iSense) and the results of a set of experiments during which we gathered LQI/RSSI measurements.

  17. Genetic heterogeneity of Atlantic bluefin tuna caught in the eastern North Atlantic Ocean south of Iceland

    E-Print Network [OSTI]

    Newman, Michael C.

    of Iceland Jens Carlsson, Jan R. McDowell, Jeanette E. L. Carlsson, Droplaug O´ lafsdo´ttir, and John E. Genetic heterogeneity of Atlantic bluefin tuna caught in the eastern North Atlantic Ocean south of Iceland, more recent studies south of Iceland reported only small differences in size of tuna caught

  18. Analysis of Epithelial and Mesenchymal Markers in Ovarian Cancer Reveals Phenotypic Heterogeneity and

    E-Print Network [OSTI]

    Hemminki, Akseli

    Analysis of Epithelial and Mesenchymal Markers in Ovarian Cancer Reveals Phenotypic Heterogeneity and Translational Medicine, Palacky University, Olomouc, Czech Republic Abstract In our studies of ovarian cancer growth is driven by E/M-MP cells, which give rise to epithelial ovarian cancer cells. In contrast

  19. RayKirchhoff multicomponent borehole seismic modelling in 3D heterogeneous, anisotropic media

    E-Print Network [OSTI]

    Edinburgh, University of

    of symmetry. This algorithm can be applied to vertical seismic profile (VSP) geometries and works well when; Anisotropy; Dipping reflectors; Converted waves 1. Introduction Using vertical seismic profiles (VSPsRay­Kirchhoff multicomponent borehole seismic modelling in 3D heterogeneous, anisotropic media $ A

  20. STUDY OF THE MTC ESTIMATION BY NOISE ANALYSIS IN 2-D HETEROGENEOUS SYSTEMS

    E-Print Network [OSTI]

    Demazière, Christophe

    STUDY OF THE MTC ESTIMATION BY NOISE ANALYSIS IN 2-D HETEROGENEOUS SYSTEMS C. DEMAZIÈRE, I. PÁZSIT and Pázsit, 2002a). Nevertheless, this previous study only investigated 1-D one-group homogeneous systems. We propose here to perform a substantially more advanced study of the same problem in 2-D two-group diffusion

  1. PeerCast: Churn-Resilient End System Multicast on Heterogeneous Overlay Networks Jianjun Zhang

    E-Print Network [OSTI]

    Liu, Ling

    P) network are confronted with high churn rates (Saroiu et al., 2002) with nodes enteringTitle: PeerCast: Churn-Resilient End System Multicast on Heterogeneous Overlay Networks Authors-7404 Phone: (706) 542-2737 Fax: (706) 542-2966 Email: laks@cs.uga.edu 1 #12;PeerCast: Churn-Resilient End

  2. TEM and EDS investigation of heterogeneous interfaces in cofired multilayer ceramic capacitors

    E-Print Network [OSTI]

    Chen, Haydn H.

    TEM and EDS investigation of heterogeneous interfaces in cofired multilayer ceramic capacitors Ceramics and Fine Processing, Tsinghua University, Beijing 100084, People's Republic of China b Department migration between AgÁ/Pd electrode and Pb-based relaxor ferroelectric ceramics were directly investigated

  3. Effects of acoustic heterogeneities on transcranial brain imaging with microwave-induced thermoacoustic tomography

    E-Print Network [OSTI]

    Wang, Lihong

    -induced thermoacoustic tomography Xing Jin Department of Biomedical Engineering, Texas A&M University, 3120 TAMU, College: thermoacoustic tomography, transcranial brain imaging, acoustic heterogeneities I. INTRODUCTION Microwave-induced thermoacoustic tomography TAT is a noninvasive and nonionizing imaging modality that can dif- ferentiate

  4. Sharing and integration of cognitive neuroscience data: Metric and pattern matching across heterogeneous ERP datasets

    E-Print Network [OSTI]

    Dou, Dejing

    heterogeneous ERP datasets Haishan Liu a,n , Gwen Frishkoff b , Robert Frank c , Dejing Dou a a Department in the sharing and integration of data from electrophysiological (ERP) studies of human brain function. The first challenge, ERP metric matching, is to identify correspondences among distinct summary features (``metrics

  5. Heterogeneous capital stocks and the optimal timing for CO2 abatement

    E-Print Network [OSTI]

    Heterogeneous capital stocks and the optimal timing for CO2 abatement Mark Jaccard *, Nic Rivers assumptions, an early start at CO2 abatement for long-lived capital stocks would be economically optimal for achieving long run targets for atmospheric CO2 concentrations. If the target is a specific concentration

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

    E-Print Network [OSTI]

    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

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

    E-Print Network [OSTI]

    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

  8. Things of Interest Recommendation by Leveraging Heterogeneous Relations in the Internet of Things

    E-Print Network [OSTI]

    Sheng, Michael

    A Things of Interest Recommendation by Leveraging Heterogeneous Relations in the Internet of Things Internet of Things (IoT) bridges the gap between the physical and the digital worlds, which enables Terms: Design, Algorithms, Performance Additional Key Words and Phrases: Internet of Things, data mining

  9. STUDY OF CLOUD LIFETIME EFFECTS USING THE SGP HETEROGENEOUS DISTRIBUTED RADAR NETWORK: PRELIMINARY CONSIDERATIONS

    E-Print Network [OSTI]

    STUDY OF CLOUD LIFETIME EFFECTS USING THE SGP HETEROGENEOUS DISTRIBUTED RADAR NETWORK: PRELIMINARY-dimensional morphology and life cycle of clouds. Detailing key cloud processes as they transit from the formation stage to precipitation onset and cloud dissipation is critical towards establishing uncertainties in climate models

  10. Service-Oriented Heterogeneous Resource Sharing for Optimizing Service Latency in Mobile Cloud

    E-Print Network [OSTI]

    Mandayam, Narayan

    Service-Oriented Heterogeneous Resource Sharing for Optimizing Service Latency in Mobile Cloud@winlab.rutgers.edu ABSTRACT Fog computing is expected to be an enabler of mobile cloud computing, which extends the cloud computing paradigm to the edge of the network. In the mobile cloud, not only central data centers but also

  11. ADVANCED HETEROGENEOUS REBURN FUEL FROM COAL AND HOG MANURE

    SciTech Connect (OSTI)

    Melanie D. Jensen; Ronald C. Timpe; Jason D. Laumb

    2003-09-01

    This study was performed to investigate whether the nitrogen content inherent in hog manure and alkali used as a catalyst during processing could be combined with coal to produce a reburn fuel that would result in advanced reburning NO{sub x} control without the addition of either alkali or ammonia/urea. Fresh hog manure was processed in a cold-charge, 1-gal, batch autoclave system at 275 C under a reducing atmosphere in the presence of an alkali catalyst. Instead of the expected organic liquid, the resulting product was a waxy solid material. The waxy nature of the material made size reduction and feeding difficult as the material agglomerated and tended to melt, plugging the feeder. The material was eventually broken up and sized manually and a water-cooled feeder was designed and fabricated. Two reburn tests were performed in a pilot-scale combustor. The first test evaluated a reburn fuel mixture comprising lignite and air-dried, raw hog manure. The second test evaluated a reburn fuel mixture made of lignite and the processed hog manure. Neither reburn fuel reduced NO{sub x} levels in the combustor flue gas. Increased slagging and ash deposition were observed during both reburn tests. The material-handling and ash-fouling issues encountered during this study indicate that the use of waste-based reburn fuels could pose practical difficulties in implementation on a larger scale.

  12. Liquid level detector

    DOE Patents [OSTI]

    Tshishiku, Eugene M. (Augusta, GA)

    2011-08-09

    A liquid level detector for conductive liquids for vertical installation in a tank, the detector having a probe positioned within a sheath and insulated therefrom by a seal so that the tip of the probe extends proximate to but not below the lower end of the sheath, the lower end terminating in a rim that is provided with notches, said lower end being tapered, the taper and notches preventing debris collection and bubble formation, said lower end when contacting liquid as it rises will form an airtight cavity defined by the liquid, the interior sheath wall, and the seal, the compression of air in the cavity preventing liquid from further entry into the sheath and contact with the seal. As a result, the liquid cannot deposit a film to form an electrical bridge across the seal.

  13. Router-level community structure of the Internet Autonomous Systems

    E-Print Network [OSTI]

    Beiró, Mariano G; Alvarez-Hamelin, J Ignacio

    2015-01-01

    The Internet is composed of routing devices connected between them and organized into independent administrative entities: the Autonomous Systems. The existence of different types of Autonomous Systems (like large connectivity providers, Internet Service Providers or universities) together with geographical and economical constraints, turns the Internet into a complex modular and hierarchical network. This organization is reflected in many properties of the Internet topology, like its high degree of clustering and its robustness. In this work, we study the modular structure of the Internet router-level graph in order to assess to what extent the Autonomous Systems satisfy some of the known notions of community structure. We show that the modular structure of the Internet is much richer than what can be captured by the current community detection methods, which are severely affected by resolution limits and by the heterogeneity of the Autonomous Systems. Here we overcome this issue by using a multiresolution d...

  14. Learning at the boundary of the firm : learning-by-interaction between a manufacturer and its users

    E-Print Network [OSTI]

    Bae, Sung Joo

    2009-01-01

    My dissertation centers on the very nature of the interaction and the learning that happens between users and manufacturers, and explores various micro-level mechanisms, which I call, "learning-by-interaction." The core ...

  15. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article) |Final Reportthe Growing American66-2012, FireFirm Uses

  16. Assessment of interpatient heterogeneity in tumor radiosensitivity for nonsmall cell lung cancer using tumor-volume variation data

    SciTech Connect (OSTI)

    Chvetsov, Alexei V. Schwartz, Jeffrey L.; Mayr, Nina; Yartsev, Slav

    2014-06-15

    Purpose: In our previous work, the authors showed that a distribution of cell surviving fractionsS{sub 2} in a heterogeneous group of patients could be derived from tumor-volume variation curves during radiotherapy for head and neck cancer. In this research study, the authors show that this algorithm can be applied to other tumors, specifically in nonsmall cell lung cancer. This new application includes larger patient volumes and includes comparison of data sets obtained at independent institutions. Methods: Our analysis was based on two data sets of tumor-volume variation curves for heterogeneous groups of 17 patients treated for nonsmall cell lung cancer with conventional dose fractionation. The data sets were obtained previously at two independent institutions by using megavoltage computed tomography. Statistical distributions of cell surviving fractionsS{sub 2} and clearance half-lives of lethally damaged cells T{sub 1/2} have been reconstructed in each patient group by using a version of the two-level cell population model of tumor response and a simulated annealing algorithm. The reconstructed statistical distributions of the cell surviving fractions have been compared to the distributions measured using predictive assays in vitro. Results: Nonsmall cell lung cancer presents certain difficulties for modeling surviving fractions using tumor-volume variation curves because of relatively large fractional hypoxic volume, low gradient of tumor-volume response, and possible uncertainties due to breathing motion. Despite these difficulties, cell surviving fractionsS{sub 2} for nonsmall cell lung cancer derived from tumor-volume variation measured at different institutions have similar probability density functions (PDFs) with mean values of 0.30 and 0.43 and standard deviations of 0.13 and 0.18, respectively. The PDFs for cell surviving fractions S{sub 2} reconstructed from tumor volume variation agree with the PDF measured in vitro. Conclusions: The data obtained in this work, when taken together with the data obtained previously for head and neck cancer, suggests that the cell surviving fractionsS{sub 2} can be reconstructed from the tumor volume variation curves measured during radiotherapy with conventional fractionation. The proposed method can be used for treatment evaluation and adaptation.

  17. A comparison of reservoir heterogeneity and recovery efficiency of two offshore bar complexes in an intracratonic basin

    SciTech Connect (OSTI)

    Whitaker, S.T.; Leetaru, H.E. (Illinois State Geological Survey, Champaign (United States))

    1991-03-01

    The US Department of Energy is developing a nation-wide reservoir classification system to update and upgrade its TORIS database. This new information will allow targeting of key reservoir types for focused research on improved an/or enhanced recovery. A comparison of two shallow marine siliciclastic reservoirs from the intracratonic Illinois basin offers an example of the level to which reservoir types need to be differentiated in order to predict optimal recovery methods. The lateral homogeneity of offshore bars within the Mississippian Cypress Formation at Bartelso field is a major factor contributing to a relatively high primary and secondary recovery efficiency. On the other hand, the lateral heterogeneity of a partially dissected offshore bar complex within the Mississippian Aux Vases Formation at King field is the major factor adversely affecting the efficiency of primary and secondary recovery techniques there. Although both these fields produce from sandstones that were deposited in shallow marine environments, a classification system must further differentiate between the two in order to stress the different exploitation procedures required to optimize recovery. Significant quantities of remaining mobile reserves may be recovered in King field-type Aux Vases reservoirs by programs involving infill drilling and selective waterflooding. Infill drilling would not be effective in recovering additional reserves from the offshore bar sands of the Cypress Formation where compartments have been effectively drained by typical well spacing and waterflooding. Instead, tertiary methods will need to be applied. Reservoir studies from a variety of basins will be needed before it can be determined to what levels reservoir classification needs to be subdivided to enable prediction of optimal recovery methods.

  18. High-resolution truncated plurigaussian simulations for the characterization of heterogeneous formations

    E-Print Network [OSTI]

    Mariethoz, Grégroire; Cornaton, Fabien; Jaquet, Olivier; 10.1111/j.1745-6584.2008.00489.x

    2011-01-01

    Integrating geological concepts, such as relative positions and proportions of the different lithofacies, is of highest importance in order to render realistic geological patterns. The truncated plurigaussian simulation method provides a way of using both local and conceptual geological information to infer the distributions of the facies and then those of hydraulic parameters. The method (Le Loc'h and Galli 1994) is based on the idea of truncating at least two underlying multi-Gaussian simulations in order to create maps of categorical variable. In this manuscript we show how this technique can be used to assess contaminant migration in highly heterogeneous media. We illustrate its application on the biggest contaminated site of Switzerland. It consists of a contaminant plume located in the lower fresh water Molasse on the western Swiss Plateau. The highly heterogeneous character of this formation calls for efficient stochastic methods in order to characterize transport processes.

  19. The public goods game on homogeneous and heterogeneous networks: investment strategy according to the pool size

    E-Print Network [OSTI]

    Zi-Gang Huang; Zhi-Xi Wu; Jian-Yue Guan; An-Cai Wu; Ying-Hai Wang

    2007-08-21

    We propose an extended public goods interaction model to study the evolution of cooperation in heterogeneous population. The investors are arranged on the well known scale-free type network, the Barab\\'{a}si-Albert model. Each investor is supposed to preferentially distribute capital to pools in its portfolio based on the knowledge of pool sizes. The extent that investors prefer larger pools is determined by investment strategy denoted by a tunable parameter $\\alpha$, with larger $\\alpha$ corresponding to more preference to larger pools. As comparison, we also study this interaction model on square lattice, and find that the heterogeneity contacts favors cooperation. Additionally, the influence of local topology to the game dynamics under different $\\alpha$ strategies are discussed. It is found that the system with smaller $\\alpha$ strategy can perform comparatively better than the larger $\\alpha$ ones.

  20. Effects of heterogeneity and friction on the deformation and strength of rock

    SciTech Connect (OSTI)

    Nihei, K.T.; Myer, L.R.; Liu, Z.; Cook, N.G.W. [Lawrence Berkeley Lab., CA (United States); Kemeny, J.M. [Univ., of Arizona, Tucson, AZ (United States). Dept. of Mineralogy and Geological Engineering

    1994-03-01

    Experimental observations of the evolution of damage in rocks during compressive loading indicate that macroscopic failure occurs predominantly by extensile crack growth parallel or subparallel to the maximum principal stress. Extensile microcracks initiate at grain boundaries and open pores by a variety of micromechanical processes which may include grain bending, Brazilian type fracture and grain boundary sliding. Microstructural heterogeneity in grain size, strength and shape determines the magnitude of the local tensile stresses which produce extensile microcracking and the stability with which these microcracks coalesce to form macrocracks. Friction at grain boundaries and between the surfaces of microcracks reduces the strain energy available for extensile crack growth and increases the stability of microcrack growth. In clastic rocks, frictional forces may improve the conditions for extensile microcrack growth by constraining the amount of sliding and rotation of individual grains. Micromechanical models are used to investigate the effects of heterogeneity and friction on the deformation and strength of crystalline and clastic rocks.