Sample records for insight macroeconomic model

  1. An Econometric Model of the Yield Curve With Macroeconomic Jump Effects

    E-Print Network [OSTI]

    Piazzesi, Monika

    2001-01-01T23:59:59.000Z

    Kenneth Singleton (1997). “An Econometric Model of the TermDiscretely-Sampled Data. ” Econometric Theory 4, pp. 231-An Econometric Model of the Yield Curve with Macroeconomic

  2. Modeling for Insights

    SciTech Connect (OSTI)

    Jacob J. Jacobson; Gretchen Matthern

    2007-04-01T23:59:59.000Z

    System Dynamics is a computer-aided approach to evaluating the interrelationships of different components and activities within complex systems. Recently, System Dynamics models have been developed in areas such as policy design, biological and medical modeling, energy and the environmental analysis, and in various other areas in the natural and social sciences. The real power of System Dynamic modeling is gaining insights into total system behavior as time, and system parameters are adjusted and the effects are visualized in real time. System Dynamic models allow decision makers and stakeholders to explore long-term behavior and performance of complex systems, especially in the context of dynamic processes and changing scenarios without having to wait decades to obtain field data or risk failure if a poor management or design approach is used. The Idaho National Laboratory recently has been developing a System Dynamic model of the US Nuclear Fuel Cycle. The model is intended to be used to identify and understand interactions throughout the entire nuclear fuel cycle and suggest sustainable development strategies. This paper describes the basic framework of the current model and presents examples of useful insights gained from the model thus far with respect to sustainable development of nuclear power.

  3. Term Structure Dynamics with Macroeconomic Factors 

    E-Print Network [OSTI]

    Park, Ha-Il

    2011-02-22T23:59:59.000Z

    Affine term structure models (ATSMs) are known to have a trade-off in predicting future Treasury yields and fitting the time-varying volatility of interest rates. First, I empirically study the role of macroeconomic variables ...

  4. Essays in macroeconomics and corporate finance

    E-Print Network [OSTI]

    Goldberg, Jonathan E. (Jonathan Elliot)

    2011-01-01T23:59:59.000Z

    This thesis examines questions at the intersection of macroeconomics and finance. Chapter 1 studies the persistent effects of a decrease in firms' ability to borrow. I develop a tractable model of deleveraging that emphasizes ...

  5. Essays in International Macroeconomics and Forecasting

    E-Print Network [OSTI]

    Bejarano Rojas, Jesus Antonio

    2012-10-19T23:59:59.000Z

    This dissertation contains three essays in international macroeconomics and financial time series forecasting. In the first essay, I show, numerically, that a two-country New-Keynesian Sticky Prices model, driven by monetary and productivity shocks...

  6. Essays in macroeconomics

    E-Print Network [OSTI]

    Nenov, Plamen T. (Plamen Toshkov)

    2012-01-01T23:59:59.000Z

    This thesis examines questions in macroeconomics motivated by the 2007-2008 financial crisis and its aftermath. Chapter 1 studies the impact of a housing bust on regional labor reallocation and the labor market. I document ...

  7. Multimodal Transport Modeling for Nairobi, Kenya: Insights and Recommendations with an Evidence-Based Model

    E-Print Network [OSTI]

    California at Berkeley, University of

    Multimodal Transport Modeling for Nairobi, Kenya: Insights and Recommendations with an Evidence-5 August 2009 #12;Multimodal Transport Modeling for Nairobi, Kenya: Insights and Recommendations

  8. Molecular modeling gives insight into nonionic surfactants

    SciTech Connect (OSTI)

    Gdanski, R.

    1995-11-01T23:59:59.000Z

    This paper describes the study of a nonionic surfactant through the use of molecular modeling software. The surfactant was decyl alcohol capped with 8 moles of ethylene oxide. This nonionic surfactant is a strong water-wetting agent as well as a good aqueous foaming agent. Four molecular dynamics studies of a single surfactant molecule were conducted under the following conditions: at a water surface at 80 F; in bulk water at 260 F; in bulk hexane at 80 F; at a hexane/water interface at 80 F. The conformations of the surfactant were observed and compared to known solubility data. The results from molecular modeling dynamics calculations will provide new insights into the behavior of surfactant molecules at surfaces and interfaces. This methodology was also extended to aggregates of surfactants to promote understanding of wetting behavior and non-emulsification behavior. In this paper, two studies were performed involving aggregates: one in bulk water at 80 F and another in bulk water at 260 F.

  9. Evolution of the Bohemian Massif: Insights from numerical modeling

    E-Print Network [OSTI]

    Cerveny, Vlastislav

    Evolution of the Bohemian Massif: Insights from numerical modeling Petra Maierová Supervisor: Doc of Geophysics Faculty of Mathematics and Physics Charles University in Prague #12;February 4, 2013Evolution Conclusions Outline #12;February 4, 2013Evolution of the Bohemian Massif: Insights from numerical modeling 3

  10. Long Run Macroeconomic Relations in the Global Economy

    E-Print Network [OSTI]

    Dees, S; Holly, Sean; Pesaran, M Hashem; Smith, L Vanessa

    This paper focuses on testing long run macroeconomic relations for interest rates, equity, prices and exchange rates within a model of the global economy. It considers a number of plausible long run relationships suggested by arbitrage in financial...

  11. Essays in macroeconomics and experiments

    E-Print Network [OSTI]

    Shurchkov, Olga

    2008-01-01T23:59:59.000Z

    This dissertation consists of four chapters on empirical and experimental macroeconomics and other experimental topics. Chapter 1 uses a laboratory experiment to test the predictions of a dynamic global game designed to ...

  12. Essays in open economy macroeconomics

    E-Print Network [OSTI]

    Ghosh, Indradeep, Ph. D. Massachusetts Institute of Technology

    2007-01-01T23:59:59.000Z

    This thesis is a collection of two essays on open economy macroeconomics. The first essay is on imperfect asset substitutability and current account dynamics. It is divided into four chapters. The first chapter in this ...

  13. Friction versus dilation revisited: Insights from theoretical and numerical models

    E-Print Network [OSTI]

    Einat, Aharonov

    Friction versus dilation revisited: Insights from theoretical and numerical models N. Makedonska,1 controlled by the frictional strength of the fault gouge, a granular layer that accumulates between the fault friction coefficient) of such granular layers is the systems resistance to dilation, a byprocess

  14. Essays on Macroeconomics

    E-Print Network [OSTI]

    Llosa, Luis Gonzalo

    2012-01-01T23:59:59.000Z

    A Microfounded Business Cycle Model . . . . . . . . . . .A Real Business Cycle Model . . . . . . . . . . . .A Real Business Cycle Model . . . . .

  15. Model year 2010 Honda insight level-1 testing report.

    SciTech Connect (OSTI)

    Rask, E.; Bocci, D.; Duoba, M.; Lohse-Busch, H. (Energy Systems)

    2011-03-22T23:59:59.000Z

    As a part of the US Department of Energy's Advanced Vehicle Testing Activity (AVTA), a model year 2010 Honda Insight was procured by eTec (Phoenix, AZ) and sent to ANL's Advanced Powertrain Research Facility for the purposes of vehicle-level testing in support of the Advanced Vehicle Testing Activity (AVTA). Data was acquired during testing using non-intrusive sensors, vehicle network information, and facilities equipment (emissions and dynamometer data). Standard drive cycles, performance cycles, steady-state cycles and A/C usage cycles were tested. Much of this data is openly available for download in ANL's Downloadable Dynamometer Database (D3). The major results are shown here in this report. Given the preliminary nature of this assessment, the majority of the testing was done over standard regulatory cycles and seeks to obtain a general overview of how the vehicle performs. These cycles include the US FTP cycle (Urban) and Highway Fuel Economy Test cycle as well as the US06, a more aggressive supplemental regulatory cycle. Data collection for this testing was kept at a fairly high level and includes emissions and fuel measurements from an exhaust emissions bench, high-voltage and accessory current and voltage from a DC power analyzer, and CAN bus data such as engine speed, engine load, and electric machine operation when available. The following sections will seek to explain some of the basic operating characteristics of the MY2010 Insight and provide insight into unique features of its operation and design.

  16. Climate Insights 101 Questions and Discussion Points: Module 1, Lesson 4: An Introduction to Climate Modelling

    E-Print Network [OSTI]

    Pedersen, Tom

    Climate Insights 101 Questions and Discussion Points: Module 1, Lesson 4: An Introduction to Climate Modelling 1 Climate Insights 101 Questions and Discussion Points Module 1, Lesson 4: An Introduction to Climate Modelling Available at http://pics.uvic.ca/education/climate-insights-101 Updated May

  17. Test Results and Modeling of the Honda Insight Using ADVISOR: Preprint

    SciTech Connect (OSTI)

    Kelly, K. J.; Zolot, M. (National Renewable Energy Laboratory); Glinsky, G.; Hieronymus, A. (Environmental Testing Corporation)

    2001-08-01T23:59:59.000Z

    Paper describing a series of chassis dynamometer and road tests that NREL conducted on the 2000 model-year Honda Insight.

  18. Roofline: An Insightful Visual Performance Model for Floating-Point Programs and Multicore Architectures

    SciTech Connect (OSTI)

    Williams, Samuel; Waterman, Andrew; Patterson, David

    2009-02-01T23:59:59.000Z

    We propose an easy-to-understand, visual performance model that offers insights to programmers and architects on improving parallel software and hardware for floating point computations.

  19. Essays in Quantitative Macroeconomics

    E-Print Network [OSTI]

    Neumuller, Seth

    2013-01-01T23:59:59.000Z

    quantitative model), I choose to focus on the volatility of permanent shocks to wages as the measure of risk for my analysis.

  20. Three essays in macroeconomics

    E-Print Network [OSTI]

    Farhi, Emmanuel

    2006-01-01T23:59:59.000Z

    Chapter 1 analyzes the theoretical and quantitative implications of optimal fiscal policy in a business cycle model with incomplete markets. I first consider the problem of a government facing expenditure shocks in an ...

  1. Essays on political institutions and macroeconomics

    E-Print Network [OSTI]

    Yared, Pierre

    2007-01-01T23:59:59.000Z

    This dissertation consists of three chapters on the interaction of political institutions and macroeconomic activity in dynamic environments. Chapter 1 studies the optimal management of taxes and debt in a framework which ...

  2. Bioenergetics Modeling in the 21st Century: Reviewing New Insights and Revisiting Old Constraints

    E-Print Network [OSTI]

    Bioenergetics Modeling in the 21st Century: Reviewing New Insights and Revisiting Old Constraints.--The development and application of fish bioenergetics models have flourished in recent years, due in part of bioenergetics models can be hampered by uncertainty in model parameters. A review of the literature showed

  3. Macroeconomics: A Survey of Laboratory Research Department of Economics

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    to laboratory experiments involving human subjects but rather to computational experiments using calibrated Welcome Abstract This chapter surveys laboratory experiments addressing macroeconomic phenomena. The first and mechanisms for resolving these problems. Part three looks at experiments in specific macroeconomic sectors

  4. INTERACTION BETWEEN PRESSURE SOLUTION AND CLAYS IN STYLOLITE DEVELOPMENT: INSIGHTS FROM MODELING

    E-Print Network [OSTI]

    Einat, Aharonov

    INTERACTION BETWEEN PRESSURE SOLUTION AND CLAYS IN STYLOLITE DEVELOPMENT: INSIGHTS FROM MODELING are strongly correlated both with the surrounding stress and with the distribution of clays within the host-solution with and without the presence of clays, where clays play a role of enhancing pressure solution. We use our model

  5. Welding processes in volcanology: insights from field, experimental, and modeling studies

    E-Print Network [OSTI]

    Russell, Kelly

    Welding processes in volcanology: insights from field, experimental, and modeling studies Anita This volume is a collection of ten papers largely derived from a special session, Welding Processes, experimental, and modeling studies. We briefly review advances in understanding welding as represented

  6. Behavioural insights into the Modelling of Freight Transportation and Distribution Systems

    E-Print Network [OSTI]

    Bertini, Robert L.

    fuelled the extension of supply chains and the globalization of the world economy. At the micro-step modelling paradigm cannot provide adequate answers in the twenty-first century global customer-driven economy. This special issue is dedicated to innovative modelling efforts that provide new insights

  7. WAGES, FLEXIBLE EXCHANGE RATES, AND MACROECONOMIC POLICY*

    E-Print Network [OSTI]

    WAGES, FLEXIBLE EXCHANGE RATES, AND MACROECONOMIC POLICY* JEFFREY SACHS In an open economy with a floaLing exchange rate, the efficacy of fiscal and monetary policy depends fundamentally on the wage rate depreciation, while fiscal expansion has no output effect. These results hold only when real wages

  8. NBER WORKING PAPER SERIES MACROECONOMIC INTERDEPENDENCE OF

    E-Print Network [OSTI]

    .S.; (2) the macroeco- nomic implications of a protectionist tariff imposed by the U.S.; and (3) the scope be the macroeconomic implications of a protectionist tariff imposed by the U.S.? Finally, what is the scope for policy

  9. Carbon Footprint and the Management of Supply Chains: Insights from Simple Models

    E-Print Network [OSTI]

    Benjaafar, Saifallah

    Carbon Footprint and the Management of Supply Chains: Insights from Simple Models Saif Benjaafar1, we illustrate how carbon emission concerns could be integrated into operational decision-making with regard to procurement, production, and inventory management. We show how, by associating carbon emission

  10. Essays on macroeconomics and forecasting

    E-Print Network [OSTI]

    Liu, Dandan

    2006-10-30T23:59:59.000Z

    is the structural factor augmented vector autoregressive (SFAVAR) model and the other is the structural factor vector autoregressive (SFVAR) model. Compared to the traditional vector autogression (VAR) model, both models incorporate far more information from...

  11. New insights on geomagnetic storms from observations and modeling

    SciTech Connect (OSTI)

    Jordanova, Vania K [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    Understanding the response at Earth of the Sun's varying energy output and forecasting geomagnetic activity is of central interest to space science, since intense geomagnetic storms may cause severe damages on technological systems and affect communications. Episodes of southward (Bzmodel (RAM), and investigate the mechanisms responsible for trapping particles and for causing their loss. We find that periods of increased magnetospheric convection coinciding with enhancements of plasma sheet density are needed for strong ring current buildup. During the HSS-driven storm the convection potential is highly variable and causes small sporadic injections into the ring current. The long period of enhanced convection during the CME-driven storm causes a continuous ring current injection penetrating to lower L shells and stronger ring current buildup.

  12. Emerging Economies, Trade Policy, and Macroeconomic Shocks

    E-Print Network [OSTI]

    Bown, Chad P.; Crowley, Meredith A.

    2014-05-09T23:59:59.000Z

    and across countries – as to how constrained these emerging economies are by WTO disciplines over their applied import tariff policies. Argentina, India, Malaysia, Philippines and Thailand, for example, each have years for which there are major changes... 0 Emerging Economies, Trade Policy, and Macroeconomic Shocks Chad P. Bown† The World Bank Meredith A. Crowley‡ University of Cambridge This version: March 2014 Abstract This paper estimates the impact of aggregate...

  13. Essays in macroeconomics and finance

    E-Print Network [OSTI]

    Mohsenzadeh Kermani, Amir Reza

    2013-01-01T23:59:59.000Z

    The first chapter proposes a model of booms and busts in housing and non-housing consumption driven by the interplay between relatively low interest rates and an expansion of credit, triggered by further decline in interest ...

  14. Essays on finance and macroeconomics

    E-Print Network [OSTI]

    Di Tella, Sebastian T. (Sebastian Tariacuri)

    2013-01-01T23:59:59.000Z

    This thesis studies the role of the financial system in the amplification and propagation of business cycles. Chapter 1 studies the origin and propagation of balance sheet recessions. I first show that in standard models ...

  15. Modelling macroeconomic flows related to large ensembles

    E-Print Network [OSTI]

    Schellekens, Michel P.

    , including, say, oil prices, interest rates, etc; dynamics of shares markets are governed by information)economics is in understanding quantitative relationships which govern flows of money, various commodities, goods and labours or filled by a water, and there is 3 #12;a price, measured in the universal physics currency, energy

  16. Alternative Measures of Welfare in Macroeconomic Models

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001)gasoline prices4 OilU.S. Offshore U.S.:7)

  17. Transportation technology transitions and macroeconomic growth -- Contemporary evidence

    SciTech Connect (OSTI)

    Santini, D.J.

    1994-12-31T23:59:59.000Z

    This paper presents international and temporal extensions of evidence for a theory developed by the author concerning the interaction of transportation technology transitions and macroeconomic growth. The period 1970 to the present is examined for the nations of Japan, the US, and Europe (France, Germany, Italy and the United Kingdom collectively). An addition to the abstract logic supporting the general arguments of the theory is also presented. The theory has been developed concerning the role of significant transportation technology transitions as a cause of significant macroeconomic declines in nations for which the manufacture of transportation vehicles (ships, locomotives, and automobiles) is a dominant economic activity. The theory offers an explanation for periods of pronounced multiyear decline in economic growth rate--sometimes called depressions and sometimes called stagnations. One purpose of this paper is to explore whether or not Japan and Europe have each recently experienced a multiyear event of this type. In the theory and the evidence presented for it, environmental regulation of transportation vehicles has been shown to be an initiating cause of significant technical change, with sharp, sustained fuel price increases being a second frequent initiating cause. These causes of significant technical change, and their possible consequences, are potentially important considerations for those proposing policies to deal with global warming, since both fuel economy regulation and fuel price increases have been recommended by policy analysts as means to reduce transportation`s contribution to global warming. The theory has been offered and supported by publications developing mathematical models and examining US historical evidence consistent with the theory.

  18. 14.454 Macroeconomic Theory IV, Fall 2004

    E-Print Network [OSTI]

    Caballero, Ricardo

    This half-term course covers the macroeconomic implications of imperfections in labor markets, goods markets, credit and financial markets. The role of nominal rigidities is also an area of focus.

  19. Three essays on empirical macroeconomics and financial markets

    E-Print Network [OSTI]

    Chen, Lili

    2012-08-21T23:59:59.000Z

    This dissertation consists of three essays on empirical macroeconomics and financial markets in the United States. Although they can be considered as three independent essays, their findings are connected with each other ...

  20. 14.452 Macroeconomic Theory II, Spring 2002

    E-Print Network [OSTI]

    Blanchard, Olivier (Olivier J.)

    The basic machines of macroeconomics. Ramsey, Solow, Samuelson-Diamond, RBCs, ISLM, Mundell-Fleming, Fischer-Taylor. How they work, what shortcuts they take, and how they can be used. Half-term subject. From the course ...

  1. Galaxy Evolution Insights from Spectral Modeling of Large Data Sets from the Sloan Digital Sky Survey

    SciTech Connect (OSTI)

    Hoversten, Erik A.; /Johns Hopkins U.

    2007-10-01T23:59:59.000Z

    This thesis centers on the use of spectral modeling techniques on data from the Sloan Digital Sky Survey (SDSS) to gain new insights into current questions in galaxy evolution. The SDSS provides a large, uniform, high quality data set which can be exploited in a number of ways. One avenue pursued here is to use the large sample size to measure precisely the mean properties of galaxies of increasingly narrow parameter ranges. The other route taken is to look for rare objects which open up for exploration new areas in galaxy parameter space. The crux of this thesis is revisiting the classical Kennicutt method for inferring the stellar initial mass function (IMF) from the integrated light properties of galaxies. A large data set ({approx} 10{sup 5} galaxies) from the SDSS DR4 is combined with more in-depth modeling and quantitative statistical analysis to search for systematic IMF variations as a function of galaxy luminosity. Galaxy H{alpha} equivalent widths are compared to a broadband color index to constrain the IMF. It is found that for the sample as a whole the best fitting IMF power law slope above 0.5 M{sub {circle_dot}} is {Lambda} = 1.5 {+-} 0.1 with the error dominated by systematics. Galaxies brighter than around M{sub r,0.1} = -20 (including galaxies like the Milky Way which has M{sub r,0.1} {approx} -21) are well fit by a universal {Lambda} {approx} 1.4 IMF, similar to the classical Salpeter slope, and smooth, exponential star formation histories (SFH). Fainter galaxies prefer steeper IMFs and the quality of the fits reveal that for these galaxies a universal IMF with smooth SFHs is actually a poor assumption. Related projects are also pursued. A targeted photometric search is conducted for strongly lensed Lyman break galaxies (LBG) similar to MS1512-cB58. The evolution of the photometric selection technique is described as are the results of spectroscopic follow-up of the best targets. The serendipitous discovery of two interesting blue compact dwarf galaxies is reported. These galaxies were identified by their extremely weak (< 150) [N {pi}] {lambda}6584 to H{alpha} emission line ratios. Abundance analysis from emission line fluxes reveals that these galaxies have gas phase oxygen abundances 12 + log(O/H) {approx} 7.7 to 7.9, not remarkably low, and near infrared imaging detects an old stellar population. However, the measured nitrogen to oxygen ratios log(N/O) < 1.7 are anomalously low for blue compact dwarf galaxies. These objects may be useful for understanding the chemical evolution of nitrogen.

  2. Three essays in finance and macroeconomics

    E-Print Network [OSTI]

    Panageas, Stavros

    2005-01-01T23:59:59.000Z

    In the first chapter I investigate whether firms' physical investments react to the speculative over-pricing of their securities. I introduce investment considerations in an infinite horizon continuous time model with short ...

  3. Three Essays in Macroeconomics and Financial Economics

    E-Print Network [OSTI]

    Kacaribu, Febrio

    2014-05-31T23:59:59.000Z

    , the expected inflation and output are more consistent with the theory suggested by the model. Value at Risk (VaR) Based on GARCH-Type Estimated Volatility of 5 Stock Markets The Great Recession has stirred up debate about risk management practices. Value...

  4. Insights from Building a Prototype for Model-based On-board Diagnosis of Automotive Systems

    E-Print Network [OSTI]

    Cengarle, María Victoria

    a rigorous mathematical model (such as the combustion engine), and to try to provide the response times

  5. Ocean Heat Transport, Sea Ice, and Multiple Climate States: Insights from Energy Balance Models

    E-Print Network [OSTI]

    Rose, Brian Edward James

    Several extensions of energy balance models (EBMs) are explored in which (i) sea ice acts to insulate the

  6. Theory of hair bundle motion: new insights from the simplest model of hair bundle

    E-Print Network [OSTI]

    Ji, Seung Keun

    2013-01-01T23:59:59.000Z

    2 Single Hair bundle motion and a simpleas a model of a single hair bundle motion . . . . . . . . .of mechan- otransduction in hair cells. ” Annu Rev Neurosci,

  7. MODELING X-RAY BINARY EVOLUTION IN NORMAL GALAXIES: INSIGHTS FROM SINGS

    SciTech Connect (OSTI)

    Tzanavaris, P.; Jenkins, L.; Lehmer, B. D.; Hornschemeier, A.; Ptak, A.; Basu-Zych, A. R. [Laboratory for X-ray Astrophysics, NASA/Goddard Space Flight Center, Mail Code 662, Greenbelt, MD 20771 (United States); Fragos, T.; Zezas, A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02139 (United States); Tremmel, M. [Department of Astronomy, University of Washington, Box 351580, Seattle, WA 98195-1580 (United States); Kalogera, V. [Center for Interdisciplinary Research and Exploration in Astrophysics and Department of Physics and Astronomy, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208 (United States)

    2013-09-10T23:59:59.000Z

    We present the largest-scale comparison to date between observed extragalactic X-ray binary (XRB) populations and theoretical models of their production. We construct observational X-ray luminosity functions (oXLFs) using Chandra observations of 12 late-type galaxies from the Spitzer Infrared Nearby Galaxy Survey. For each galaxy, we obtain theoretical XLFs (tXLFs) by combining XRB synthetic models, constructed with the population synthesis code StarTrack, with observational star formation histories (SFHs). We identify highest-likelihood models both for individual galaxies and globally, averaged over the full galaxy sample. Individual tXLFs successfully reproduce about half of the oXLFs, but for some galaxies we are unable to find underlying source populations, indicating that galaxy SFHs and metallicities are not well matched and/or that XRB modeling requires calibration on larger observational samples. Given these limitations, we find that the best models are consistent with a product of common envelope ejection efficiency and central donor concentration {approx_equal} 0.1, and a 50% uniform-50% ''twins'' initial mass-ratio distribution. We present and discuss constituent subpopulations of tXLFs according to donor, accretor, and stellar population characteristics. The galaxy-wide X-ray luminosity due to low-mass and high-mass XRBs, estimated via our best global model tXLF, follows the general trend expected from the L{sub X} -star formation rate and L{sub X} -stellar mass relations of Lehmer et al. Our best models are also in agreement with modeling of the evolution of both XRBs over cosmic time and of the galaxy X-ray luminosity with redshift.

  8. Currents and turbulence within a kelp forest (Macrocystis pyrifera): Insights from a dynamically scaled laboratory model

    E-Print Network [OSTI]

    Denny, Mark

    forest as an array of vertical cylinders underestimates the net drag by a factor of 1.5 to 3 with pressure gradient, drag, and acceleration terms of the momentum budget. A good model for kelp drag stresses is less critical. The bulk drag coefficient is highest at the up-current end of a kelp forest

  9. Fundulus as the premier teleost model in environmental biology: Opportunities for new insights using genomics

    E-Print Network [OSTI]

    Pfrender, Michael

    University, Baton Rouge, LA 70803, USA r Aquatic Biotechnology and Environmental Laboratory, UniversityReview Fundulus as the premier teleost model in environmental biology: Opportunities for new, Charleston, SC 29412, USA b Clemson Institute of Environmental Toxicology, Clemson University; Pendleton, SC

  10. 9.7 um Silicate Features in AGNs: New Insights into Unification Models

    E-Print Network [OSTI]

    Y. Shi; G. H. Rieke; D. C. Hines; V. Gorjian; M. W. Werner; K. Cleary; F. J. Low; P. S. Smith; J. Bouwman

    2006-12-15T23:59:59.000Z

    We describe observations of 9.7 um silicate features in 97 AGNs, exhibiting a wide range of AGN types and of X-ray extinction toward the central nuclei. We find that the strength of the silicate feature correlates with the HI column density estimated from fitting the X-ray data, such that low HI columns correspond to silicate emission while high columns correspond to silicate absorption. The behavior is generally consistent with unification models where the large diversity in AGN properties is caused by viewing-angle-dependent obscuration of the nucleus. Radio-loud AGNs and radio-quiet quasars follow roughly the correlation between HI columns and the strength of the silicate feature defined by Seyfert galaxies. The agreement among AGN types suggests a high-level unification with similar characteristics for the structure of the obscuring material. We demonstrate the implications for unification models qualitatively with a conceptual disk model. The model includes an inner accretion disk (< 0.1 pc in radius), a middle disk (0.1-10 pc in radius) with a dense diffuse component and with embedded denser clouds, and an outer clumpy disk (10-300 pc in radius).

  11. Structural Basis of Folding Cooperativity in Model Proteins: Insights from a Microcanonical Perspective

    E-Print Network [OSTI]

    Bachmann, Michael

    characteristic in protein folding. It is defined by a depletion of states that lie energetically between folded have been observed only in lattice models. INTRODUCTION Two-state protein folding is characterized (19,20), and protein folding (21­27). Two remarks are worthwhile: 1. If the transition

  12. Monday 16 June 09:30 Macroeconomics. 14:30 Advanced Econometrics 1 (2 hours).

    E-Print Network [OSTI]

    Oxford, University of

    Monday 16 June 09:30 Macroeconomics. 14:30 Advanced Econometrics 1 (2 hours). Tuesday 17 June 09 2 (2 hours). 14:30 Advanced Econometrics 2 (2 hours). Friday 20 June 09:30 Advanced Microeconomics 1

  13. Genome sequence analysis of the model grass Brachypodium distachyon: insights into grass genome evolution

    SciTech Connect (OSTI)

    Schulman, Al

    2009-08-09T23:59:59.000Z

    Three subfamilies of grasses, the Erhardtoideae (rice), the Panicoideae (maize, sorghum, sugar cane and millet), and the Pooideae (wheat, barley and cool season forage grasses) provide the basis of human nutrition and are poised to become major sources of renewable energy. Here we describe the complete genome sequence of the wild grass Brachypodium distachyon (Brachypodium), the first member of the Pooideae subfamily to be completely sequenced. Comparison of the Brachypodium, rice and sorghum genomes reveals a precise sequence- based history of genome evolution across a broad diversity of the grass family and identifies nested insertions of whole chromosomes into centromeric regions as a predominant mechanism driving chromosome evolution in the grasses. The relatively compact genome of Brachypodium is maintained by a balance of retroelement replication and loss. The complete genome sequence of Brachypodium, coupled to its exceptional promise as a model system for grass research, will support the development of new energy and food crops

  14. Transition from static to kinetic friction: Insights from a 2D model

    E-Print Network [OSTI]

    Trømborg, Jørgen; Amundsen, David Skålid; Thøgersen, Kjetil; Malthe-Sørenssen, Anders

    2013-01-01T23:59:59.000Z

    We describe a 2D spring-block model for the transition from static to kinetic friction at an elastic slider/rigid substrate interface obeying a minimalistic friction law (Amontons-Coulomb). By using realistic boundary conditions, a number of previously unexplained experimental results on precursory micro-slip fronts are successfully reproduced. From the analysis of the interfacial stresses, we derive a prediction for the evolution of the precursor length as a function of the applied loads, as well as an approximate relationship between microscopic and macroscopic friction coefficients. We show that the stress build-up due to both elastic loading and micro-slip-related relaxations depend only weakly on the underlying shear crack propagation dynamics. Conversely, crack speed depends strongly on both the instantaneous stresses and the friction coefficients, through a non-trivial scaling parameter.

  15. An empirical specification of the pesek and saving macroeconomic model

    E-Print Network [OSTI]

    Moser, Ernest Richard

    1970-01-01T23:59:59.000Z

    AN EvtPIRICAL SPECIFICATION OF THE PESEK AND SAVING EACROECONONIC NODEL A Thesis by Ernest Richard Noser Submitted to the Graduate ColleEe of Texas A ". i University in partial fulfillment of the requirement for the deCree of KASTM OF SCIENCE... of non-accumulating totals for the stocks of equitics, durables, and bonds must be considered as a source of error. 19 TADLE 4 TlDE DZUQ~D FGd DG:;DD Variable e yt FJP r E ? P Coefficient -0. 03 0. 07 -0. 01 -0. 11 -O. G7 31. 09 -0. 53 1. 29...

  16. An Evaluation of Macroeconomic Models for Use at EIA

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001)gasoline prices4 OilU.S. Offshore U.S.:7)An AssessmentAn

  17. The effects of gas-fluid-rock interactions on CO2 injection and storage: Insights from reactive transport modeling

    SciTech Connect (OSTI)

    Xiao, Y.; Xu, T.; Pruess, K.

    2008-10-15T23:59:59.000Z

    Possible means of reducing atmospheric CO{sub 2} emissions include injecting CO{sub 2} in petroleum reservoirs for Enhanced Oil Recovery or storing CO{sub 2} in deep saline aquifers. Large-scale injection of CO{sub 2} into subsurface reservoirs would induce a complex interplay of multiphase flow, capillary trapping, dissolution, diffusion, convection, and chemical reactions that may have significant impacts on both short-term injection performance and long-term fate of CO{sub 2} storage. Reactive Transport Modeling is a promising approach that can be used to predict the spatial and temporal evolution of injected CO{sub 2} and associated gas-fluid-rock interactions. This presentation will summarize recent advances in reactive transport modeling of CO{sub 2} storage and review key technical issues on (1) the short- and long-term behavior of injected CO{sub 2} in geological formations; (2) the role of reservoir mineral heterogeneity on injection performance and storage security; (3) the effect of gas mixtures (e.g., H{sub 2}S and SO{sub 2}) on CO{sub 2} storage; and (4) the physical and chemical processes during potential leakage of CO{sub 2} from the primary storage reservoir. Simulation results suggest that CO{sub 2} trapping capacity, rate, and impact on reservoir rocks depend on primary mineral composition and injecting gas mixtures. For example, models predict that the injection of CO{sub 2} alone or co-injection with H{sub 2}S in both sandstone and carbonate reservoirs lead to acidified zones and mineral dissolution adjacent to the injection well, and carbonate precipitation and mineral trapping away from the well. Co-injection of CO{sub 2} with H{sub 2}S and in particular with SO{sub 2} causes greater formation alteration and complex sulfur mineral (alunite, anhydrite, and pyrite) trapping, sometimes at a much faster rate than previously thought. The results from Reactive Transport Modeling provide valuable insights for analyzing and assessing the dynamic behaviors of injected CO{sub 2}, identifying and characterizing potential storage sites, and managing injection performance and reducing costs.

  18. Update on INSIGHTS Development

    SciTech Connect (OSTI)

    Not Listed; Eric Burgett

    2011-09-01T23:59:59.000Z

    INSIGHTS is a transformational separate effects testing capability to perform in situ irradiation studies and characterization of the microscale behavior of nuclear fuel materials under a wide variety of in-pile conditions. Separate effects testing including growth, irradiation, and monitoring of these materials, and encompasses the full science based approach for fuels development from the nanoscale to the mesoscale behavior of the sample material and other defects driven by the modeling and simulation efforts of INL.

  19. Atomic Level Green-Kubo Stress Correlation Function for a Model Crystal: An Insight into Molecular Dynamics Results on a Model Liquid

    E-Print Network [OSTI]

    V. A. Levashov

    2014-06-23T23:59:59.000Z

    In order to get insight into the connection between the vibrational dynamics and the atomic level Green-Kubo stress correlation function in liquids we consider this connection in a model crystal instead. Of course, vibrational dynamics in liquids and crystals are quite different and it is not expected that the results obtained on a model crystal should be valid for liquids. However, these considerations provide a benchmark to which the results of the previous molecular dynamics simulations can be compared. Thus, assuming that vibrations are plane waves, we derive analytical expressions for the atomic level stress correlation functions in the classical limit and analyze them. These results provide, in particular, a recipe for analysis of the atomic level stress correlation functions in Fourier space and extraction of the wavevector and frequency dependent information. We also evaluate the energies of the atomic level stresses. Obtained energies are significantly smaller than the energies that were obtained in MD simulations of liquids previously. This result suggests that the average energies of the atomic level stresses in liquids and glasses are largely determined by the structural disorder. We discuss this result in the context of equipartition of the atomic level stress energies. Analysis of the previously published data suggests that it is possible to speak about configurational and vibrational contributions to the average energies of the atomic level stresses in a glass state. However, this separation in a liquid state is problematic. We also consider peak broadening in the pair distribution function with increase of distance. We find that peak broadening (by ~40%) occurs due to the transverse vibrational modes, while contribution from the longitudinal modes does not change with distance. Finally, we introduce and consider atomic level transverse current correlation function.

  20. Course title: Sustainable Development and Macroeconomics Lecturer: Dina Barbian, University of Erlangen-Nuremberg

    E-Print Network [OSTI]

    1 Course title: Sustainable Development and Macroeconomics Lecturer: Dina Barbian, University: 9-11.30 Introduction to the topic and the case studies Sustainable Development ­ Definition and History Lecture Notes Tuesday: 9-11.30 Sustainable Development and Economic Growth Searching for a new way

  1. The macroeconomic effects of oil price shocks : why are the 2000s so different from the 1920s?

    E-Print Network [OSTI]

    Blanchard, Olivier

    2007-01-01T23:59:59.000Z

    We characterize the macroeconomic performance of a set of industrialized economies in the aftermath of the oil price shocks of the 1970s and of the last decade, focusing on the differences across episodes. We examine four ...

  2. Interaction of waves and currents with kelp forests (Macrocystis pyrifera): Insights from a dynamically scaled laboratory model

    E-Print Network [OSTI]

    Denny, Mark

    a dynamically matched 1/25-scale physical model in a laboratory flume. In experiments with kelp mimics, waves a dynamically scaled laboratory model Johanna H. Rosman,a,* Mark W. Denny,b Robert B. Zeller,c Stephen G between model kelp and water under waves increased wake generation of turbulence, resulting in turbulent

  3. 14.451 Macroeconomic Theory I, Spring 2003

    E-Print Network [OSTI]

    Angeletos, Marios

    The first half of the semester is an introduction to the techniques and the applications of dynamic general equilibrium models, with particular emphasis on models of economic growth.

  4. Land-use change trajectories up to 2050: insights from a global agro-economic model comparison

    SciTech Connect (OSTI)

    Schmitz, Christoph; van Meijl, Hans; Kyle, G. Page; Nelson, Gerald C.; Fujimori, Shinichiro; Gurgel, Angelo; Havlik, Petr; Heyhoe, Edwina; Mason d'Croz, Daniel; Popp, Alexander; Sands, Ronald; Tabeau, Andrzej; van der Mensbrugghe, Dominique; von Lampe, Martin; Wise, Marshall A.; Blanc, Elodie; Hasegawa, Tomoko; Kavallari, Aikaterini; Valin, Hugo

    2014-01-01T23:59:59.000Z

    Changes in agricultural land use have important implications for environmental services. Previous studies of agricultural land-use futures have been published indicating large uncertainty due to different model assumptions and methodologies. In this article we present a first comprehensive comparison of global agro-economic models that have harmonized drivers of population, GDP, and biophysical yields. The comparison allows us to ask two research questions: (1) How much cropland will be used under different socioeconomic and climate change scenarios? (2) How can differences in model results be explained? The comparison includes four partial and six general equilibrium models that differ in how they model land supply and amount of potentially available land. We analyze results of two different socioeconomic scenarios and three climate scenarios (one with constant climate). Most models (7 out of 10) project an increase of cropland of 10–25% by 2050 compared to 2005 (under constant climate), but one model projects a decrease. Pasture land expands in some models, which increase the treat on natural vegetation further. Across all models most of the cropland expansion takes place in South America and sub-Saharan Africa. In general, the strongest differences in model results are related to differences in the costs of land expansion, the endogenous productivity responses, and the assumptions about potential cropland.

  5. Insights from a Simple Hotelling Model of the World Oil Market C.-Y. Cynthia Lina1

    E-Print Network [OSTI]

    Lin, C.-Y. Cynthia

    data used in this study were acquired with the help of Brian Greene and with funds from the Littauer Kennedy School Pre-Doctoral Fellowship in energy policy. All errors are my own. #12;1 1 INTRODUCTION. In a 1980-1981 study by Stanford University's Energy Modeling Forum of ten prominent models of the world oil

  6. Modeling disease-related proteins in Saccharomyces cerevisiae : insights into alpha-synuclein and TorsinA biology

    E-Print Network [OSTI]

    Valastyan, Julie S. (Julie Suzanne)

    2013-01-01T23:59:59.000Z

    The yeast Saccharomyces cerevisiae has long been used to model complex cellular processes. As a eukaryote, much of its fundamental biology is conserved with higher organisms. As a single-celled, genetically tractable ...

  7. 14.772 Development Economics: Macroeconomics, Spring 2009

    E-Print Network [OSTI]

    Kremer, Michael

    This course emphasizes dynamic models of growth and development. Topics covered include: migration, modernization, and technological change; static and dynamic models of political economy; the dynamics of income distribution ...

  8. IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, VOL. 51, NO. 3, AUGUST 2009 471 New Insights Into Lightning Return-Stroke Models

    E-Print Network [OSTI]

    Florida, University of

    core are examined based on LCS and DCS models. Index Terms--Continuity equation, corona sheath. Dynamics of lightning-channel corona sheath sur- rounding the thin channel core are examined based continuity equation, in terms of two cur- rent components, propagation current and corona current. For lumped

  9. Applications of Time Series in Finance and Macroeconomics

    E-Print Network [OSTI]

    Ibarra Ramirez, Raul

    2011-08-08T23:59:59.000Z

    with constant intensity. The last essay applies a dynamic factor model to generate out-of-sample forecasts for the inflation rate in Mexico. Factor models are useful to summarize the information contained in large datasets. We evaluate the role of using a wide...

  10. Precipitation and Air Pollution at Mountain and Plain Stations in Northern China: Insights Gained from Observations and Modeling

    SciTech Connect (OSTI)

    Guo, Jianping; Deng, Minjun; Fan, Jiwen; Li, Zhanqing; Chen, Qian; Zhai, Panmao; Dai, Zhijian; Li, Xiaowen

    2014-04-27T23:59:59.000Z

    We analyzed 40 year data sets of daily average visibility (a proxy for surface aerosol concentration) and hourly precipitation at seven weather stations, including three stations located on the Taihang Mountains, during the summertime in northern China. There was no significant trend in summertime total precipitation at almost all stations. However, light rain decreased, whereas heavy rain increased as visibility decreased over the period studied. The decrease in light rain was seen in both orographic-forced shallow clouds and mesoscale stratiform clouds. The consistent trends in observed changes in visibility, precipitation, and orographic factor appear to be a testimony to the effects of aerosols. The potential impact of large-scale environmental factors, such as precipitable water, convective available potential energy, and vertical wind shear, on precipitation was investigated. No direct links were found. To validate our observational hypothesis about aerosol effects, Weather Research and Forecasting model simulations with spectral-bin microphysics at the cloud-resolving scale were conducted. Model results confirmed the role of aerosol indirect effects in reducing the light rain amount and frequency in the mountainous area for both orographic-forced shallow clouds and mesoscale stratiform clouds and in eliciting a different response in the neighboring plains. The opposite response of light rain to the increase in pollution when there is no terrain included in the model suggests that orography is likely a significant factor contributing to the opposite trends in light rain seen in mountainous and plain areas.

  11. Essays on the stock market's reaction to macroeconomic news

    E-Print Network [OSTI]

    Cenesizoglu, Tolga

    2006-01-01T23:59:59.000Z

    topapadakis (2002) use a GARCH model of daily equity returnsGDP announcements using a simple GARCH framework for dailybe able to account for GARCH-type behavior of condi- tional

  12. aldehydes mechanistic insights: Topics by E-print Network

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

    Decho, Alan 55 MODELING AND MECHANISTIC INSIGHTS INTO THE DEVELOPMENT OF ALLERGIC AIRWAY RESPONSES TO HOUSE DUST MITE. Open Access Theses and Dissertations Summary: ??...

  13. Uncertainty quantification and validation of combined hydrological and macroeconomic analyses.

    SciTech Connect (OSTI)

    Hernandez, Jacquelynne; Parks, Mancel Jordan; Jennings, Barbara Joan; Kaplan, Paul Garry; Brown, Theresa Jean; Conrad, Stephen Hamilton

    2010-09-01T23:59:59.000Z

    Changes in climate can lead to instabilities in physical and economic systems, particularly in regions with marginal resources. Global climate models indicate increasing global mean temperatures over the decades to come and uncertainty in the local to national impacts means perceived risks will drive planning decisions. Agent-based models provide one of the few ways to evaluate the potential changes in behavior in coupled social-physical systems and to quantify and compare risks. The current generation of climate impact analyses provides estimates of the economic cost of climate change for a limited set of climate scenarios that account for a small subset of the dynamics and uncertainties. To better understand the risk to national security, the next generation of risk assessment models must represent global stresses, population vulnerability to those stresses, and the uncertainty in population responses and outcomes that could have a significant impact on U.S. national security.

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

    E-Print Network [OSTI]

    Arora, Parth

    2012-10-19T23:59:59.000Z

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

  15. Approved Module Information for BS3365, 2014/5 Module Title/Name: Macroeconomics Policy Module Code: BS3365

    E-Print Network [OSTI]

    Neirotti, Juan Pablo

    on macroeconomic policies 3 Oil and the macroeconomy ? Causes of oil price changes ? Oil prices; investment and depreciation ? Steady state ? Numerical examples 5 Economic Growth 2 ? Savings and investment Direct Investment and Policy (Professor Nigel Driffield) ? Benefits of FDI ? Aspects to FDI Policy

  16. CUISINE AND INSIGHTS ON

    E-Print Network [OSTI]

    Liley, David

    industry. 8 FUEL THE FIRE Fuel-sensor technologies have been developed using artificial intelligence to give drivers accurate fuel readings. 12 LEAF MATTER New insights into the highly efficient energy Chern. 15 MEASURED RESPONSE Working with Credit Union Foundation Australia to create a poverty

  17. ImSET 3.1: Impact of Sector Energy Technologies Model Description and User's Guide

    SciTech Connect (OSTI)

    Scott, Michael J.; Livingston, Olga V.; Balducci, Patrick J.; Roop, Joseph M.; Schultz, Robert W.

    2009-05-22T23:59:59.000Z

    This 3.1 version of the Impact of Sector Energy Technologies (ImSET) model represents the next generation of the previously-built ImSET model (ImSET 2.0) that was developed in 2005 to estimate the macroeconomic impacts of energy-efficient technology in buildings. In particular, a special-purpose version of the Benchmark National Input-Output (I-O) model was designed specifically to estimate the national employment and income effects of the deployment of Office of Energy Efficiency and Renewable Energy (EERE)–developed energy-saving technologies. In comparison with the previous versions of the model, this version features the use of the U.S. Bureau of Economic Analysis 2002 national input-output table and the central processing code has been moved from the FORTRAN legacy operating environment to a modern C++ code. ImSET is also easier to use than extant macroeconomic simulation models and incorporates information developed by each of the EERE offices as part of the requirements of the Government Performance and Results Act. While it does not include the ability to model certain dynamic features of markets for labor and other factors of production featured in the more complex models, for most purposes these excluded features are not critical. The analysis is credible as long as the assumption is made that relative prices in the economy would not be substantially affected by energy efficiency investments. In most cases, the expected scale of these investments is small enough that neither labor markets nor production cost relationships should seriously affect national prices as the investments are made. The exact timing of impacts on gross product, employment, and national wage income from energy efficiency investments is not well-enough understood that much special insight can be gained from the additional dynamic sophistication of a macroeconomic simulation model. Thus, we believe that this version of ImSET is a cost-effective solution to estimating the economic impacts of the development of energy-efficient technologies.

  18. Threat Insight Quarterly Regulatory Compliance

    E-Print Network [OSTI]

    X-Force ® Threat Insight Quarterly Regulatory Compliance www.iss.netwww.iss.net October 2006 #12 Risk Index ..............................................11 Future X-Force Threat Insight Quarterly Internet Security Systems X-Force® Threat Insight Quarterly > October 2006 ©2006 Internet Security Systems

  19. Threat Insight Quarterly Browser Exploitation

    E-Print Network [OSTI]

    X-Force ® Threat Insight Quarterly Browser Exploitation www.iss.netwww.iss.net January 2007 #12 . . . . . . . . . . . . . . . . . . . . . . . . 11 Previous X-Force Threat Insight Quarterly Topics . . . . . . . . . . 15 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Contents IBM Internet Security Systems X-Force® Threat Insight Quarterly > January 2007

  20. Threat Insight Quarterly Wireless Technology

    E-Print Network [OSTI]

    X-Force ® Threat Insight Quarterly Wireless Technology April 2006 #12;X - F O R C E T H R E A T I N the Wireless Threat ..................................................3 Wireless Threats-Force Catastrophic Risk Index...................................... 13 Future X-Force Threat Insight Quarterly Topics

  1. Threat Insight Quarterly Vulnerability Management

    E-Print Network [OSTI]

    X-Force ® Threat Insight Quarterly Vulnerability Management July 2006 #12;X - F O R C E T H R E.................. 7 X-Force Catastrophic Risk Index.............................. 10 Future X-Force Threat Insight Introduction There is a wide range of threats that can exist in any network. The presence of unpatched

  2. Hyperons: Insights into baryon structures

    SciTech Connect (OSTI)

    Lach, J.

    1991-08-01T23:59:59.000Z

    The baryon octet is composed mainly of hyperons. Modern high energy hyperon beams provide a tool for the study of hyperon static properties and interactions. Experiments with these beams have provided new insights into hyperon rare decays, magnetic moments, and interactions. These experiments provide us with insights into the strong, weak, and electromagnetic structure of the baryons. 65 refs., 45 figs., 5 tabs.

  3. Towards a reconstruction of macroeconomics using a stock flow consistent (SFC) model

    E-Print Network [OSTI]

    Godley, Wynne

    . Balancing ; (1) (2) current (3) capital (4) current (5)capital (6) item (7) 1. Inventories +I -I 0 2. Fixed capital +K -K 0 3. Cash +HP +HB -H 0 4. Current accounts +MC -MC 0 5. Deposit accounts +MD -MD 0 6. Bills +BP +BB... of interest on, respectively, bills, money, commercial bills and loans. (**) V (wealth) = NW+DG+I+K ; NW=net worth of firms, DG=government debt, I=inventories, K=fixed capital stock 4 postulated production sector, which we may describe...

  4. Macroeconomic models of consumer demand for consumer packaged goods in Asia

    E-Print Network [OSTI]

    Mau, Jonathan

    2012-01-01T23:59:59.000Z

    CPGCo, a global manufacturer of consumer packaged goods, has had tremendous difficulty in producing accurate forecasts for its products in developing markets. The problem was especially apparent during the global economic ...

  5. Insights from UT Austin Energy Poll

    Broader source: Energy.gov [DOE]

    Insights from UT Austin Energy Poll, Insights from UT Austin Energy Poll on U.S. Consumer Attitudes, July 24, 2013, Sheril Kirshenbaum, director of The Energy Poll.

  6. Insights on the binding of thioflavin derivative markers to amyloid fibril models and A?{sub 1-40} fibrils from computational approaches

    SciTech Connect (OSTI)

    Alí-Torres, Jorge; Rimola, Albert; Sodupe, Mariona [Departament de Química, Universitat Autònoma de Barcelona, Bellaterra 08193 (Spain); Rodriguez-Rodríguez, Cristina [Medicinal Inorganic Chemistry Group, Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, V6T 1Z1 (Canada)

    2014-10-06T23:59:59.000Z

    The present contribution analyzes the binding of ThT and neutral ThT derivatives to a ?-sheet model by means of quantum chemical calculations. In addition, we study the properties of four molecules: (2-(2-hydroxyphenyl)benzoxazole (HBX), 2-(2-hydroxyphenyl)benzothiazole (HBT) and their respective iodinated compounds, HBXI and HBTI, in binding to amyloid fibril models and A?{sub 1-40}fibrils by using a combination of docking, molecular dynamics and quantum mechanics calculations.

  7. Consumer Energy Use Insights

    E-Print Network [OSTI]

    McCracken, B.

    2013-01-01T23:59:59.000Z

    : Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 When do people charge their cars? Source: Pecan Street Research Institute 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 Model*percent ESL-KT-13-12-23 CATEE... 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 When do people charge their cars? Source: Pecan Street Research Institute 0:00 2:00 4:00 6:00 8:00 10:00 12:00 14:00 16:00 18:00 20:00 22:00 Pricing*Trial*percent Model...

  8. Gravity modeling of the Song Hong basin: an insight into its crustal structure and implication for the formation of the basin

    E-Print Network [OSTI]

    Nguyen, Vu Giang

    1996-01-01T23:59:59.000Z

    3-D gravity inversion and rift stretching models are used in the Song Hong basin to determine the general configuration of the upper mantle and the mechanism for its formation in the region. The basin approximately 200 km wide by 600 km in length...

  9. Earth Insights By Phil Rawlings

    E-Print Network [OSTI]

    Earth Insights By Phil Rawlings If you have a question about geothermal installation, design some portion of the water elsewhere) rates are typically 10-30% and may reduce depth per nominal ton is shallow, pipe returning to the heat pump is deep. Mr. Rawlings has over twenty-five years experience

  10. Ice Formation in Arctic Mixed-Phase Clouds: Insights from a 3-D Cloud-Resolving Model with Size-Resolved Aerosol and Cloud Microphysics

    SciTech Connect (OSTI)

    Fan, Jiwen; Ovtchinnikov, Mikhail; Comstock, Jennifer M.; McFarlane, Sally A.; Khain, Alexander

    2009-02-27T23:59:59.000Z

    The single-layer mixed-phase clouds observed during the Atmospheric Radiation Measurement (ARM) program’s Mixed-Phase Arctic Cloud Experiment (MPACE) are simulated with a 3-dimensional cloud-resolving model the System for Atmospheric Modeling (SAM) coupled with an explicit bin microphysics scheme and a radar-lidar simulator. Two possible ice enhancement mechanisms – activation of droplet evaporation residues by condensation-followed-by-freezing and droplet freezing by contact freezing inside-out, are scrutinized by extensive comparisons with aircraft and radar and lidar measurements. The locations of ice initiation associated with each mechanism and the role of ice nuclei (IN) in the evolution of mixed-phase clouds are mainly addressed. Simulations with either mechanism agree well with the in-situ and remote sensing measurements on ice microphysical properties but liquid water content is slightly underpredicted. These two mechanisms give very similar cloud microphysical, macrophysical, dynamical, and radiative properties, although the ice nucleation properties (rate, frequency and location) are completely different. Ice nucleation from activation of evaporation nuclei is most efficient near cloud top areas concentrated on the edges of updrafts, while ice initiation from the drop freezing process has no significant location preference (occurs anywhere that droplet evaporation is significant). Both enhanced nucleation mechanisms contribute dramatically to ice formation with ice particle concentration of 10-15 times higher relative to the simulation without either of them. The contribution of ice nuclei (IN) recycling from ice particle evaporation to IN and ice particle concentration is found to be very significant in this case. Cloud can be very sensitive to IN initially and form a nonquilibrium transition condition, but become much less sensitive as cloud evolves to a steady mixed-phase condition. The parameterization of Meyers et al. [1992] with the observed MPACE IN concentration is able to predict the observed mixed-phase clouds reasonably well. This validation may facilitate the application of this parameterization in the cloud and climate models to simulate Arctic clouds.

  11. Building America Whole-House Solutions for New Homes: Insight...

    Energy Savers [EERE]

    Insight Homes, Seaford, Delaware Building America Whole-House Solutions for New Homes: Insight Homes, Seaford, Delaware Case study of Insight Homes, who worked with the Building...

  12. IBM Internet Security Systems Threat Insight Monthly

    E-Print Network [OSTI]

    IBM Internet Security Systems X-Force ® Threat Insight Monthly www.iss.netwww.iss.net February 2007 Contents www.iss.netwww.iss.net IBM Internet Security Systems X-Force ® Threat Insight Monthly February 2007 #12;X-Force® Threat Insight Monthly > February 2007 www.iss.netwww.iss.net About this report

  13. IBM Internet Security Systems Threat Insight Monthly

    E-Print Network [OSTI]

    IBM Internet Security Systems X-Force ® Threat Insight Monthly www.iss.netwww.iss.net June 2007 #12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Contents www.iss.netwww.iss.net IBM Internet Security Systems X-Force ® Threat Insight Monthly June 2007 #12;X-Force® Threat Insight Monthly > June 2007 www.iss.netwww.iss.net About this report

  14. Stock market volatility and price discovery : three essays on the effect of macroeconomic information

    E-Print Network [OSTI]

    Rangel, Jose Gonzalo

    2006-01-01T23:59:59.000Z

    Modified GARCH (1,1) Model with Non Persistent AnnouncementModified GARCH (1,1) Model with Non Persistent AnnouncementModified GARCH (1,1) Model with Non Persistent Announcement

  15. Optimization of California's Water Supply System: Results and Insights

    E-Print Network [OSTI]

    Pasternack, Gregory B.

    headings: Optimization; California; Water supply; Water shortage. Introduction Water is scarceOptimization of California's Water Supply System: Results and Insights Marion W. Jenkins1 ; Jay R-engineering optimization model of California's water supply system. The results of this 4-year effort illustrate the value

  16. Application Insight Through Performance Modeling Gabriel Marin

    E-Print Network [OSTI]

    Marin, Gabriel

    that estimate the maximum gain expected from tuning different parts of an application, or from increasing the number of machine resources. We show how this metric helped iden- tify a bottleneck in the ASCI Sweep3D benchmark where the lack of instruction-level parallelism limited performance. Transforming one frequently

  17. Voices of Experience | Insights into Advanced Distribution Management...

    Office of Environmental Management (EM)

    Voices of Experience | Insights into Advanced Distribution Management Systems (February 2015) Voices of Experience | Insights into Advanced Distribution Management Systems...

  18. A VECX* Model of the Swiss Economy

    E-Print Network [OSTI]

    Assenmacher-Wesche, Katrin; Pesaran, M Hashem

    A VECX? Model of the Swiss Economy? Katrin Assenmacher-Wesche Swiss National Bank M. Hashem Pesaran Cambridge University, CIMF, and USC February 21, 2008 Abstract This paper applies the modelling strategy of Garratt, Lee, Pesaran and Shin (2003... ) to the estimation of a structural cointegrated VAR model that relates the core macroeconomic variables of the Swiss economy to current and lagged values of a number of key foreign variables. We identify and test a long-run structure between the variables. Moreover...

  19. Insight Homes | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, search OpenEIHesperia,IDGWPIndiantown,Innoferm GmbH Jump to:EnergyInsight Homes

  20. AVTA: 2010 Honda Insight HEV Testing Results

    Broader source: Energy.gov [DOE]

    The Vehicle Technologies Office's Advanced Vehicle Testing Activity carries out testing on a wide range of advanced vehicles and technologies on dynamometers, closed test tracks, and on-the-road. These results provide benchmark data that researchers can use to develop technology models and guide future research and development. The following reports describe results of testing done on a 2010 Honda Insight hybrid-electric vehicle. Baseline and other data collected at Idaho National Laboratory is in the attached documents. Baseline and battery testing data collected at Argonne National Laboratory is available in summary and CSV form on the Argonne Downloadable Dynometer Database site (http://www.anl.gov/energy-systems/group/downloadable-dynamometer-databas...). Taken together, these reports give an overall view of how this vehicle functions under extensive testing.

  1. Three Essays on Price Dynamics and Causations among Energy Markets and Macroeconomic Information

    E-Print Network [OSTI]

    Hong, Sung Wook 1977-

    2012-09-20T23:59:59.000Z

    This dissertation examines three important issues in energy markets: price dynamics, information flow, and structural change. We discuss each issue in detail, building empirical time series models, analyzing the results, and interpreting...

  2. Decision insight into stakeholder conflict for ERN.

    SciTech Connect (OSTI)

    Siirola, John; Tidwell, Vincent Carroll; Benz, Zachary O.; Stansbury, Melanie; Richards, Elizabeth H.; Turnley, Jessica Glicken (Galisteo Consulting); Warrender, Christina E.; Morrow, James Dan

    2012-02-01T23:59:59.000Z

    Participatory modeling has become an important tool in facilitating resource decision making and dispute resolution. Approaches to modeling that are commonly used in this context often do not adequately account for important human factors. Current techniques provide insights into how certain human activities and variables affect resource outcomes; however, they do not directly simulate the complex variables that shape how, why, and under what conditions different human agents behave in ways that affect resources and human interactions related to them. Current approaches also do not adequately reveal how the effects of individual decisions scale up to have systemic level effects in complex resource systems. This lack of integration prevents the development of more robust models to support decision making and dispute resolution processes. Development of integrated tools is further hampered by the fact that collection of primary data for decision-making modeling is costly and time consuming. This project seeks to develop a new approach to resource modeling that incorporates both technical and behavioral modeling techniques into a single decision-making architecture. The modeling platform is enhanced by use of traditional and advanced processes and tools for expedited data capture. Specific objectives of the project are: (1) Develop a proof of concept for a new technical approach to resource modeling that combines the computational techniques of system dynamics and agent based modeling, (2) Develop an iterative, participatory modeling process supported with traditional and advance data capture techniques that may be utilized to facilitate decision making, dispute resolution, and collaborative learning processes, and (3) Examine potential applications of this technology and process. The development of this decision support architecture included both the engineering of the technology and the development of a participatory method to build and apply the technology. Stakeholder interaction with the model and associated data capture was facilitated through two very different modes of engagement, one a standard interface involving radio buttons, slider bars, graphs and plots, while the other utilized an immersive serious gaming interface. The decision support architecture developed through this project was piloted in the Middle Rio Grande Basin to examine how these tools might be utilized to promote enhanced understanding and decision-making in the context of complex water resource management issues. Potential applications of this architecture and its capacity to lead to enhanced understanding and decision-making was assessed through qualitative interviews with study participants who represented key stakeholders in the basin.

  3. IBM Internet Security Systems Threat Insight Monthly

    E-Print Network [OSTI]

    IBM Internet Security Systems X-Force ® Threat Insight Monthly www.iss.netwww.iss.net May 2007 #12 The Emerging Threat Landscape . . . . . . . . . . . . . . . . . . . . . . . . 2 Mobile Security Threats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Contents www.iss.netwww.iss.net IBM Internet Security Systems X-Force ® Threat Insight Monthly May

  4. IBM Internet Security Systems Threat Insight Monthly

    E-Print Network [OSTI]

    of cryptography as it relates to the computer security industry. We will look at some of the underlying technologyIBM Internet Security Systems X-Force ® Threat Insight Monthly www.iss.netwww.iss.net September . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Contents www.iss.netwww.iss.net IBM Internet Security Systems X-Force ® Threat Insight Monthly

  5. The Great Shift: Macroeconomic projections For the World Economy at the 2050 Horizon

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    function that includes capital, labour and energy. We improve on the literature by accounting for the energy constraint through dynamic modelling of energy productivity, and departing from the assumptions, China could account for 33% of the world economy in 2050, which would be much more than the United

  6. On housing booms and credit market conditions: A state space model

    E-Print Network [OSTI]

    Del Moral , Pierre

    of residential mortgage loans, especially since 2002. The impulse response analysis from the estimated model imply lower financial costs of the mortgage loan, which may lead to an increas- ing demand for housing, Mukherjee, Seru and Vig; 2010). Despite these findings, at the level of macroeconomic aggregation, no clear

  7. Comparative Analysis of Modeling Studies on China's Future Energy and Emissions Outlook

    SciTech Connect (OSTI)

    Zheng, Nina; Zhou, Nan; Fridley, David

    2010-09-01T23:59:59.000Z

    The past decade has seen the development of various scenarios describing long-term patterns of future Greenhouse Gas (GHG) emissions, with each new approach adding insights to our understanding of the changing dynamics of energy consumption and aggregate future energy trends. With the recent growing focus on China's energy use and emission mitigation potential, a range of Chinese outlook models have been developed across different institutions including in China's Energy Research Institute's 2050 China Energy and CO2 Emissions Report, McKinsey & Co's China's Green Revolution report, the UK Sussex Energy Group and Tyndall Centre's China's Energy Transition report, and the China-specific section of the IEA World Energy Outlook 2009. At the same time, the China Energy Group at Lawrence Berkeley National Laboratory (LBNL) has developed a bottom-up, end-use energy model for China with scenario analysis of energy and emission pathways out to 2050. A robust and credible energy and emission model will play a key role in informing policymakers by assessing efficiency policy impacts and understanding the dynamics of future energy consumption and energy saving and emission reduction potential. This is especially true for developing countries such as China, where uncertainties are greater while the economy continues to undergo rapid growth and industrialization. A slightly different assumption or storyline could result in significant discrepancies among different model results. Therefore, it is necessary to understand the key models in terms of their scope, methodologies, key driver assumptions and the associated findings. A comparative analysis of LBNL's energy end-use model scenarios with the five above studies was thus conducted to examine similarities and divergences in methodologies, scenario storylines, macroeconomic drivers and assumptions as well as aggregate energy and emission scenario results. Besides directly tracing different energy and CO{sub 2} savings potential back to the underlying strategies and combination of efficiency and abatement policy instruments represented by each scenario, this analysis also had other important but often overlooked findings.

  8. The Inhibitor DBMIB Provides Insight into the Functional Architecture...

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

    The Inhibitor DBMIB Provides Insight into the Functional Architecture of the Qo Site in the Cytochrome b(6)f Complex . The Inhibitor DBMIB Provides Insight into the Functional...

  9. Insight into Alzheimer's, cancer, anemia gleaned from ribosome...

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

    Insights from ribosome research Insight into Alzheimer's, cancer, anemia gleaned from ribosome research Groundbreaking study of the human ribosome reveals tiny molecular machine is...

  10. ALS Gives Chevron Scientists New Insights into Corrosion Resistance

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

    ALS Gives Chevron Scientists New Insights into Corrosion Resistance ALS Gives Chevron Scientists New Insights into Corrosion Resistance Print Thursday, 25 July 2013 13:44 In the...

  11. RCx Insights and Best Practices from Utilities

    Broader source: Energy.gov [DOE]

    Presentation covers the RCx Insights and Best Practices from Utilities and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Rapid City, South Dakota.

  12. 10/24/14, 1:40 PMA New Macroeconomic Strategy by Jeffrey D. Sachs -Project Syndicate Page 1 of 4http://www.project-syndicate.org/print/declining-investment-in-rich-countries-by-jeffrey-d-sachs-2014-10

    E-Print Network [OSTI]

    books include The End of Poverty and Common Wealth. OCT 23, 2014 A New Macroeconomic Strategy NEW YORK of income that is saved rather than consumed should be invested to improve future wellbeing that we turn "excess" saving into another consumption binge. Supply-siders, by contrast, want to promote

  13. Qualitative insights on fundamental mechanics

    E-Print Network [OSTI]

    G. N. Mardari

    2006-11-10T23:59:59.000Z

    The gap between classical mechanics and quantum mechanics has an important interpretive implication: the Universe must have an irreducible fundamental level, which determines the properties of matter at higher levels of organization. We show that the main parameters of any fundamental model must be theory-independent. They cannot be predicted, because they cannot have internal causes. However, it is possible to describe them in the language of classical mechanics. We invoke philosophical reasons in favor of a specific model, which treats particles as sources of real waves. Experimental considerations for gravitational, electromagnetic, and quantum phenomena are outlined.

  14. BLUE VIEW VISION INSIGHT! Good news--your vision plan

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    WELCOME TO BLUE VIEW VISION INSIGHT! Good news--your vision plan is flexible and easy to use, your discounts, and much more! Blue View Vision InsightSM University of California Student Health Insurance Plan (UC SHIP) 2013/14 Your Blue View Vision Insight Network Blue View Vision Insight offers you

  15. BLUE VIEW VISION INSIGHT! Good news--your vision plan

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    WELCOME TO BLUE VIEW VISION INSIGHT! Good news--your vision plan is flexible and easy to use, your discounts, and much more! Blue View Vision InsightSM University of California Student Health Insurance Plan (UC SHIP) 2012/13 Your Blue View Vision Insight Network Blue View Vision Insight offers you

  16. Essays in macroeconomics

    E-Print Network [OSTI]

    Daula, Thomas Anthony; Daula, Thomas Anthony

    2012-01-01T23:59:59.000Z

    2.2.4 Multivariate GARCH . . . . . . . . . .US quarterly growth volatility: GARCH(1,1) . . . . . . . .to output volatility: GARCH(1,1) . . Correlation with US

  17. Essays in macroeconomics

    E-Print Network [OSTI]

    Daula, Thomas Anthony; Daula, Thomas Anthony

    2012-01-01T23:59:59.000Z

    A. , Sanjay Mithal, and Eric Neis, “Corporate Yield Spreads:power. Longstaff, Mithal, and Neis (2005) also found that a

  18. Macroeconomic Activity Module

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

    explain the growth in GDP: the growth rate of nonfarm employment and the rate of productivity change associated with employment. As Table 2.1 indicates, in the Reference case,...

  19. Macroeconomic Activity Module

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

    explain the growth in GDP: the growth rate of nonfarm employment and the rate of productivity change associated with employment. As Table 2.1 indicates, real GDP growth slows...

  20. Essays on international macroeconomics

    E-Print Network [OSTI]

    Gómez-González, Patricia

    2014-01-01T23:59:59.000Z

    This thesis examines several aspects of open economies. The first two chapters are about sovereign debt and its interactions with domestic financial markets. The third chapter, coauthored with my classmate Daniel Rees, ...

  1. Essays on Macroeconomics

    E-Print Network [OSTI]

    Llosa, Luis Gonzalo

    2012-01-01T23:59:59.000Z

    and volatility can lead to information being used in aexternalities lead to information being used inefficientlywhere public information can lead to welfare losses because

  2. Insights into C4 metabolism from comparative deep sequencing

    E-Print Network [OSTI]

    Burgess, Steven J.; Hibberd, Julian M.

    2015-06-05T23:59:59.000Z

    subtypes: insights from comparative transcriptome analysis of NAD-ME, NADP-219 ME, and PEP-CK C4 species. J. Exp. Bot. 2014, 65:3579–93. 220 12. Brautigam A, Kajala K, Wullenweber J, Sommer M, Gagneul D, Weber KL, Carr KM, Gowik U, Mass J, 221 Lercher... 11 16. Wang Y, Bräutigam A, Weber APM, Zhu X-G: Three distinct biochemical subtypes of C4 235 photosynthesis? A modelling analysis. J. Exp. Bot. 2014, 65:3567–78. 236 17. Sommer M, Bräutigam A, Weber APM: The dicotyledonous NAD malic enzyme C4...

  3. Please cite this article in press as: Hallegatte, S. et al., Business cycles, bifurcations and chaos in a neo-classical model with investment dynamics, Journal of Economic Behavior and Organization (2007), doi:10.1016/j.jebo.2007.05.001

    E-Print Network [OSTI]

    Ghil, Michael

    B.V. All rights reserved. Keywords: Macroeconomic dynamics; Non-equilibrium modeling; BusinessPlease cite this article in press as: Hallegatte, S. et al., Business cycles, bifurcations and chaos in a neo-classical model with investment dynamics, Journal of Economic Behavior and Organization

  4. Insights from US ITER: Strategies for Accelerating

    E-Print Network [OSTI]

    Insights from US ITER: Strategies for Accelerating Fusion Energy as a Project Ned Sauthoff US ITER Project Manager SOFE Town Hall Meeting | June 27, 2011 #12;1. Treat fusion energy as a project, rather than a program. Mission: ·Rapid materials and fusion systems development, leading

  5. Academy Insights Vol. 4, No. 9

    E-Print Network [OSTI]

    Paulsson, Johan

    findings and for advancing one's own career through scholarship. Medical educators, for whom the classroom likely published. The investigators concluded that advances in medical education will dependAcademy Insights Vol. 4, No. 9 Medical Education Grand Rounds Presenting Our Annual Medical Student

  6. Academy Insights Vol. 4, No. 10

    E-Print Network [OSTI]

    Goodrich, Lisa V.

    Academy Insights Vol. 4, No. 10 Medical Education Fellows Selected for 2014-2015 Twenty HMS faculty-2015. They were selected on a competitive basis by four fellowship programs: the HMS Academy Fellowships, curriculum development, assessment, and feedback. The Academy Fellowship in Medical Education, sponsored

  7. Internet Security Systems, an IBM Company Threat Insight Monthly

    E-Print Network [OSTI]

    Internet Security Systems, an IBM Company X-Force ® Threat Insight Monthly www . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Contents www.iss.netwww.iss.net Internet Security Systems, an IBM Company X-Force Threat Insight Monthly April 2007 #12;X-Force® Threat Insight Monthly > April 2007 www.iss.netwww.iss.net About

  8. Monetary Policy and Dark Corners in a stylized Agent-Based Model

    E-Print Network [OSTI]

    Gualdi, Stanislao; Zamponi, Francesco; Bouchaud, Jean-Philippe

    2015-01-01T23:59:59.000Z

    We generalise the stylised macroeconomic Agent-Based model introduced in "Tipping Points in Macroeconomic Agent Based Models" [JEDC 50, 29-61 (2015)], with the aim of investigating the role and efficacy of monetary policy of a 'Central Bank', that sets the interest rate such as to steer the economy towards a prescribed inflation and unemployment level. Our major finding is that provided its policy is not too aggressive (in a sense detailed in the paper) the Central Bank is successful in achieving its goals. However, the existence of different equilibrium states of the economy, separated by phase boundaries (or "dark corners"), can cause the monetary policy itself to trigger instabilities and be counter-productive. In other words, the Central Bank must navigate in a narrow window: too little is not enough, too much leads to instabilities and wildly oscillating economies. This conclusion strongly contrasts with the prediction of DSGE models.

  9. ERDC/EL TN-11-1 Flood Risk Management: Insights from

    E-Print Network [OSTI]

    US Army Corps of Engineers

    ERDC/EL TN-11-1 March 2011 Flood Risk Management: Insights from an Expert Modeling Process by M. D preparedness planning that harmonizes efforts of implementing agencies and stakeholders. Risk management are essential for effective risk management policy. Formal (versus ad hoc) analyses of risk manager and stake

  10. New Insight into Photoalignment of Liquid Crystals on Coumarin-Containing Polymer Films

    E-Print Network [OSTI]

    Chen, Shaw H.

    and Laboratory for Laser Energetics, UniVersity of Rochester, 240 East RiVer Road, Rochester, New York 14623New Insight into Photoalignment of Liquid Crystals on Coumarin-Containing Polymer Films Chunki Kim order predicted by the kinetic model, and the energetics of molecular interaction. Introduction

  11. Insights from Agricultural and Forestry GHG Offset Bruce A. McCarl

    E-Print Network [OSTI]

    McCarl, Bruce A.

    of Agricultural Economics Texas A&M University, College Station TX This work benefited from support largely from of the Energy Modeling Forum activities that are partially supported by EPRI. #12;Insights from Agricultural favorable to production of southern pine, while others allow production of redwoods and douglas fir

  12. The water-benzene interaction: Insight from electronic structure theories Jie Ma,1,2,3

    E-Print Network [OSTI]

    Alfè, Dario

    The water-benzene interaction: Insight from electronic structure theories Jie Ma,1,2,3 Dario Alfè,2 theories is challenging. Here we assess the ability of a variety of theories to describe a water-benzene- tween water and benzene. Water benzene is an interesting model system because it is a reasonably small

  13. Role of positive ions on the surface production of negative ions in a fusion plasma reactor type negative ion source—Insights from a three dimensional particle-in-cell Monte Carlo collisions model

    SciTech Connect (OSTI)

    Fubiani, G.; Boeuf, J. P. [Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9 (France) [Université de Toulouse, UPS, INPT, LAPLACE (Laboratoire Plasma et Conversion d'Energie), 118 route de Narbonne, F-31062 Toulouse cedex 9 (France); CNRS, LAPLACE, F-31062 Toulouse (France)

    2013-11-15T23:59:59.000Z

    Results from a 3D self-consistent Particle-In-Cell Monte Carlo Collisions (PIC MCC) model of a high power fusion-type negative ion source are presented for the first time. The model is used to calculate the plasma characteristics of the ITER prototype BATMAN ion source developed in Garching. Special emphasis is put on the production of negative ions on the plasma grid surface. The question of the relative roles of the impact of neutral hydrogen atoms and positive ions on the cesiated grid surface has attracted much attention recently and the 3D PIC MCC model is used to address this question. The results show that the production of negative ions by positive ion impact on the plasma grid is small with respect to the production by atomic hydrogen or deuterium bombardment (less than 10%)

  14. BAYESIAN INSIGHTS ON DISCLOSURE LIMITATION: MASK OR IMPUTE?

    SciTech Connect (OSTI)

    S. KELLER-MCNULTY; G. DUNCAN

    2000-10-01T23:59:59.000Z

    Statistical agencies seek to disseminate useful data while keeping low the risk of statistical confidentiality disclosure. Recognizing that reidentification of data is generally inadequate to protect its confidentiality against attack by a data snooper, agencies restrict the data they release for general use. Typically, these restricted data procedures have involved transformation or masking of the original, collected data through such devices as adding noise, topcoding, data swapping, and recoding. Recently, proposals have been put forth for the release of synthetic data, simulated from models constructed from the original data. This paper gives a framework for the comparison of masking and synthetic data as two approaches to disclosure limitation. Particular attention is paid to data utility and disclosure risk. Examples of instantiation of masking and of synthetic data construction are provided to illustrate the concepts. Particular attention is paid to data swapping. Insights drawn from the Bayesian paxadigm are provided.

  15. Applying insights from repository safety assessments.

    SciTech Connect (OSTI)

    Swift, Peter N.

    2010-03-01T23:59:59.000Z

    Despite decades of international consensus that deep geological disposal is the best option for permanent management of long-lived high-level radioactive wastes, no repositories for used nuclear fuel or high-level waste are in operation. Detailed long-term safety assessments have been completed worldwide for a wide range of repository designs and disposal concepts, however, and valuable insights from these assessments are available to inform future decisions about managing radioactive wastes. Qualitative comparisons among the existing safety assessments for disposal concepts in clay, granite, salt, and unsaturated volcanic tuff show how different geologic settings can be matched with appropriate engineered barrier systems to provide a high degree of confidence in the long-term safety of geologic disposal. Review of individual assessments provides insights regarding the release pathways and radionuclides that are most likely to contribute to estimated doses to humans in the far future for different disposal concepts, and can help focus research and development programs to improve management and disposal technologies. Lessons learned from existing safety assessments may be particularly relevant for informing decisions during the process of selecting potential repository sites.

  16. Economics definitions, methods, models, and analysis procedures for Homeland Security applications.

    SciTech Connect (OSTI)

    Ehlen, Mark Andrew; Loose, Verne William; Vargas, Vanessa N.; Smith, Braeton J.; Warren, Drake E.; Downes, Paula Sue; Eidson, Eric D.; Mackey, Greg Edward

    2010-01-01T23:59:59.000Z

    This report gives an overview of the types of economic methodologies and models used by Sandia economists in their consequence analysis work for the National Infrastructure Simulation&Analysis Center and other DHS programs. It describes the three primary resolutions at which analysis is conducted (microeconomic, mesoeconomic, and macroeconomic), the tools used at these three levels (from data analysis to internally developed and publicly available tools), and how they are used individually and in concert with each other and other infrastructure tools.

  17. Economic Model For a Return on Investment Analysis of United States Government High Performance Computing (HPC) Research and Development (R & D) Investment

    SciTech Connect (OSTI)

    Joseph, Earl C.; Conway, Steve; Dekate, Chirag

    2013-09-30T23:59:59.000Z

    This study investigated how high-performance computing (HPC) investments can improve economic success and increase scientific innovation. This research focused on the common good and provided uses for DOE, other government agencies, industry, and academia. The study created two unique economic models and an innovation index: 1 A macroeconomic model that depicts the way HPC investments result in economic advancements in the form of ROI in revenue (GDP), profits (and cost savings), and jobs. 2 A macroeconomic model that depicts the way HPC investments result in basic and applied innovations, looking at variations by sector, industry, country, and organization size. ? A new innovation index that provides a means of measuring and comparing innovation levels. Key findings of the pilot study include: IDC collected the required data across a broad set of organizations, with enough detail to create these models and the innovation index. The research also developed an expansive list of HPC success stories.

  18. Battery Usage and Thermal Performance of the Toyota Prius and Honda Insight for Various Chassis Dynamometer Test Procedures: Preprint

    SciTech Connect (OSTI)

    Kelly, K. J.; Mihalic, M.; Zolot, M.

    2001-11-20T23:59:59.000Z

    This study describes the results from the National Renewable Energy Laboratory's (NREL) chassis dynamometer testing of a 2000 model year Honda Insight and 2001 model year Toyota Prius. The tests were conducted for the purpose of evaluating the battery thermal performance, assessing the impact of air conditioning on fuel economy and emissions, and providing information for NREL's Advanced Vehicle Simulator (ADVISOR).

  19. atoll kiritimati insights: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 387 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  20. achilles insight qus: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 386 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  1. accretionary orogens insights: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 447 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  2. aminotransferase ehpsat insights: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 359 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  3. alsophila spinulosa insights: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 355 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  4. acacia tortilis insights: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 426 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  5. australopithecus africanus insights: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 365 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  6. acorn weevil insight: Topics by E-print Network

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

    for Research in Environmental Sciences, University Sun, Dezheng 452 Is the Internet for Porn? An Insight Into the Online Adult Industry Computer Technologies and Information...

  7. Radiation tolerance of ceramics—Insights from atomistic...

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

    different radiation response as the damage accumulates. Citation: Devanathan R, WJ Weber, and JD Gale.2010."Radiation tolerance of ceramicsInsights from atomistic simulation...

  8. Ecofys-Nationally Appropriate Mitigation Actions: Insights from...

    Open Energy Info (EERE)

    Actions: Insights from Example Development1 "Ecofys elaborated in several projects, concrete examples of NAMAs to understand the issues arising from this concept. This report...

  9. AVTA: Honda Insight HEV 2010 Testing Results | Department of...

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

    The following reports describe results of testing done on a 2010 Honda Insight hybrid-electric vehicle. The baseline performance testing provides a point of comparison...

  10. Improved understanding of protein complex offers insight into...

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

    Improved understanding of protein complex offers insight into DNA replication initiation mechanism basics By Angela Hardin * March 18, 2015 Tweet EmailPrint Argonne, Ill. - A...

  11. Worldwide Trends in Energy Use and Efficiency: Key Insights from...

    Open Energy Info (EERE)

    Efficiency: Key Insights from International Energy Agency (IEA) Indicator Analysis in Support of the Group of Eight (G8) Plan of Action Jump to: navigation, search Tool Summary...

  12. New insight into the Berezinskii-Kosterlitz-Thouless phase transition

    E-Print Network [OSTI]

    Urs Gerber; Wolfgang Bietenholz; Fernando G Rejón-Barrera

    2014-02-11T23:59:59.000Z

    We investigate the 2d XY model by using the constraint angle action, which belongs to the class of topological lattice actions. These actions violate important features usually demanded for a lattice action, such as the correct classical continuum limit and the applicability of perturbation theory. Nevertheless, they still lead to the same universal quantum continuum limit and show excellent scaling behavior. By using the constraint angle action we gain new insight into the Berezinskii-Kosterlitz-Thouless phase transition of the 2d XY model. This phase transition is of special interest since it is one of the few examples of a phase transition beyond second order. It is of infinite order and therefore an essential phase transition. In particular, we observe an excellent scaling behavior of the helicity modulus, which characterizes this phase transition. We also observe that the mechanism of (un)binding vortex--anti-vortex pairs follows the usual pattern, although free vortices do not require any energy in the formulation of the 2d XY model using the constraint angle action.

  13. DEGRADATION OF TRANSPARENT CONDUCTIVE OXIDES: MECHANISTIC INSIGHTS AND INTERFACIAL ENGINEERING

    E-Print Network [OSTI]

    Rollins, Andrew M.

    DEGRADATION OF TRANSPARENT CONDUCTIVE OXIDES: MECHANISTIC INSIGHTS AND INTERFACIAL ENGINEERING;Degradation of Transparent Conductive Oxides: Mechanistic insights and Interfacial engineering Case Western;Dedicated to the science and engineering of photovoltaics, in an effort to make a better world. #12;Table

  14. Energy and Water Interactions: Insights from Mathematical Models

    E-Print Network [OSTI]

    Keller, Arturo A.

    EnergyUse Water Use or Environmental Impact More More Less Less 0 0 Biofuels Production? Seawater desalting Water-Water TradeoffsEnergyUse Water Use or Environmental Impact More More Less Less 0 0 Biofuels Production? Seawater improvements Solar generation agriculture substitution? Pumping Shale oil Production? Drip irrigation-SW Trade

  15. The ADVANCE project: Insights and achievments

    SciTech Connect (OSTI)

    NONE

    1996-12-31T23:59:59.000Z

    ADVANCE [Advanced Driver and Vehicle Advisory Navigation ConcEpt] was a public/private partnership conceived and developed by four founding parties. The founding parties include the Federal Highway Administration (FHWA), the Illinois Department of Transportation (IDOT), the University of Illinois at Chicago and Northwestern University operating together under the auspices of the Illinois Universities Transportation Research Consortium (IUTRC), and Motorola, Inc. The major responsibilities of each party are fully described in the Project agreement. Subsequently, these four were joined on the Steering Committee by the American Automobile Association (AAA). This unique blending of public sector, private sector and university interests, augmented by more than two dozen other private sector participants, provided a strong set of resources for ADVANCE. The ADVANCE test area covered over 300 square miles including portions of the City of Chicago and 40 northwest suburban communities. The Project encompasses the high growth areas adjacent to O`Hare International Airport, the Schaumburg/Hoffman Estates office and retail complexes, and the Lake-Cook Road development corridor. It also includes major sports and entertainment complexes such as the Arlington International Racecourse and the Rosemont Horizon. The population in the area is more than 750,000. The Insights and Perspectives Compendium is intended to provide useful information to project managers, system developers, and system integrators of future similar ITS implementations. It is intended for those that are technically interested in the ADVANCE Project and have a basic understanding of the project.

  16. Insights from the downhole dynamometer database

    SciTech Connect (OSTI)

    Waggoner, J.R.

    1997-03-01T23:59:59.000Z

    The Downhole Dynamometer Database is a compilation of test data collected with a set of five downhole tools built by Albert Engineering under contract to Sandia National Laboratories. The downhole dynamometer tools are memory tools deployed in the sucker rod string with sensors to measure pressure, temperature, load, and acceleration. The acceleration data is processed to yield position, so that a load vs. position dynagraph can be generated using data collected downhole. With five tools in the hole at one time, all measured data and computed dynagraphs from five different positions in the rod string are available. The purpose of the Database is to provide industry with a complete and high quality measurement of downhole sucker rod pumping dynamics. To facilitate use of the database, Sandia has developed a Microsoft Windows-based interface that functions as a visualizer and browser to the more than 40 MBytes of data. The interface also includes a data export feature to allow users to extract data from the database for use in their own programs. Following a brief description of the downhole dynamometer tools, data collection program, and database content, this paper will illustrate a few of the interesting and unique insights gained from the downhole data.

  17. Computer Modeling Illuminates Degradation Pathways of Cations in Alkaline Membrane Fuel Cells (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2012-08-01T23:59:59.000Z

    Cation degradation insights obtained by computational modeling could result in better performance and longer lifetime for alkaline membrane fuel cells.

  18. Thermal Evaluation of the Honda Insight Battery Pack: Preprint

    SciTech Connect (OSTI)

    Zolot, M.D.; Kelly, K.; Keyser, M.; Mihalic, M.; Pesaran, A.; Hieronymus, A.

    2001-06-18T23:59:59.000Z

    The hybrid vehicle test efforts at National Renewable Energy Laboratory (NREL), with a focus on the Honda Insight's battery thermal management system, are presented. The performance of the Insight's high voltage NiMH battery pack was characterized by conducting in-vehicle dynamometer testing at Environmental Testing Corporation's high altitude dynamometer test facility, on-road testing in the Denver area, and out-of-car testing in NREL's Battery Thermal Management Laboratory. It is concluded that performance does vary considerably due to thermal conditions the pack encounters. The performance variations are due to both inherent NiMH characteristics, and the Insight's thermal management system.

  19. Novel Insights into the Downstream Pathways and Targets Controlled by Transcription Factors CREM in the Testis

    E-Print Network [OSTI]

    2012-01-01T23:59:59.000Z

    proteins in spermatids: Downstream targets and implicationsNovel Insights into the Downstream Pathways and TargetsNovel Insights into the Downstream Pathways and Targets

  20. New Insights on congested part of the FD calibration

    E-Print Network [OSTI]

    Bertini, Robert L.

    New Insights on congested part of the FD calibration from Loop Detector Data Nicolas Chiabaut an automatic method that will permits efficient on-line calibration procedure #12;Outline of the paper

  1. Maintenance Records for 2010 Honda Insight EX vin 0141

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

    Insight EX VIN JHMZE2H78AS010141 Date Mileage Description Cost 12102009 5,947 Changed oil and filter and inspected brake system 30.44 252010 11,011 Changed oil and filter and...

  2. 2010 Honda Insight VIN 0141 Hybrid Electric Vehicle Battery Test...

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

    2 2010 Honda Insight VIN 0141 Hybrid Electric Vehicle Battery Test Results Tyler Gray Mathew Shirk January 2013 The Idaho National Laboratory is a U.S. Department of Energy...

  3. 2010 Honda Insight VIN 1748 Hybrid Electric Vehicle Battery Test...

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

    3 2010 Honda Insight VIN 1748 Hybrid Electric Vehicle Battery Test Results Tyler Gray Matthew Shirk January 2013 The Idaho National Laboratory is a U.S. Department of Energy...

  4. Genome sequence of the Brown Norway rat yields insights into

    E-Print Network [OSTI]

    Pachter, Lior

    Genome sequence of the Brown Norway rat yields insights into mammalian evolution Rat Genome Norway (BN) rat strain. The sequence represents a high-quality `draft' covering over 90% of the genome

  5. Advancing healthcare technology through insight, innovation, and leadership

    E-Print Network [OSTI]

    Soloveichik, David

    Advancing healthcare technology through insight, innovation, and leadership Master of Translational medical technologies and improving healthcare delivery? Successful medical innovation requires more than of medical innovators. Applications are open to engineers, scientists, and clinicians with a passion

  6. Suppressions and cascades : insights from gauge/gravity dualities

    E-Print Network [OSTI]

    Ejaz, Qudsia Jabeen

    2008-01-01T23:59:59.000Z

    At present, there are no non-perturbative analytic methods available for investigating gauge theories at large couplings. Consequently, it is desirable to explore more avenues to gain qualitative and quantitative insights. ...

  7. Enzyme Structure Provides Insights into Cancer and Aging

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

    Enzyme Structure Provides Insights into Cancer and Aging Print XPD helicase is an enzyme that unwinds the DNA double helix; it is one component of an essential repair mechanism...

  8. Social network theory: new insights and issues for behavioral ecologists

    E-Print Network [OSTI]

    Sih, Andrew; Hanser, Sean F.; McHugh, Katherine A.

    2009-01-01T23:59:59.000Z

    interactions using social network theory (SNT; reviewed inShen W, Jordan W (2007) Social network analysis of animal009-0725-6 REVIEW Social network theory: new insights and

  9. active site insights: Topics by E-print Network

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

    disassembly of C-site. Our current results Lee, Keun Woo 2 Theoretic Insight into CO2 Reduction at Active Sites of Molybdenum and Tungsten Enzymes: a pi Interaction between CO2...

  10. Better Buildings Neighborhood Program Business Models Guide

    Broader source: Energy.gov [DOE]

    Uses lessons learned from Better Buildings grantees, existing data, and private sector insights to highlight business models that can help develop a sustainable residential energy efficiency market.

  11. Improved computer models support genetics research

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

    Simple computer models unravel genetic stress reactions in cells Integrated biological and computational methods provide insight into why genes are activated. February 8, 2013 When...

  12. Better Buildings Neighborhood Program Business Models Guide ...

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

    Guide Better Buildings Neighborhood Program Business Models Guide Uses lessons learned from Better Buildings grantees, existing data, and private sector insights to highlight...

  13. Technical Insights for Saltstone PA Maintenance

    SciTech Connect (OSTI)

    Flach, G.; Sarkar, S.; Mahadevan, S.; Kosson, D.

    2011-07-20T23:59:59.000Z

    The Cementitious Barriers Partnership (CBP) is a collaborative program sponsored by the US DOE Office of Waste Processing. The objective of the CBP is to develop a set of computational tools to improve understanding and prediction of the long-term structural, hydraulic, and chemical performance of cementitious barriers and waste forms used in nuclear applications. CBP tools are expected to better characterize and reduce the uncertainties of current methodologies for assessing cementitious barrier performance and increase the consistency and transparency of the assessment process, as the five-year program progresses. In September 2009, entering its second year of funded effort, the CBP sought opportunities to provide near-term tangible support to DOE Performance Assessments (PAs). The Savannah River Saltstone Disposal Facility (SDF) was selected for the initial PA support effort because (1) cementitious waste forms and barriers play a prominent role in the performance of the facility, (2) certain important long-term behaviors of cementitious materials composing the facility are uncertain, (3) review of the SDF PA by external stakeholders is ongoing, and (4) the DOE contractor responsible for the SDF PA is open to receiving technical assistance from the CBP. A review of the current (SRR Closure & Waste Disposal Authority 2009) and prior Saltstone PAs (e.g., Cook et al. 2005) suggested five potential opportunities for improving predictions. The candidate topics considered were (1) concrete degradation from external sulfate attack, (2) impact of atmospheric exposure to concrete and grout before closure, such as accelerated slag and Tc-99 oxidation, (3) mechanistic prediction of geochemical conditions, (4) concrete degradation from rebar corrosion due to carbonation, and (5) early age cracking from drying and/or thermal shrinkage. The candidate topics were down-selected considering the feasibility of addressing each issue within approximately six months, and compatibility with existing CBP expertise and already-planned activities. Based on these criteria, the five original topics were down-selected to two: external sulfate attack and mechanistic geochemical prediction. For each of the selected topics, the CBP communicated with the PA analysts and subject matter experts at Savannah River to acquire input data specific to the Saltstone facility and related laboratory experiments. Simulations and analyses were performed for both topics using STADIUM (SIMCO 2008), LeachXS/ORCHESTRA (ECN 2007, Meeussen 2003), and other software tools. These supplemental CBP analyses produced valuable technical insights that can be used to strengthen the Saltstone PA using the ongoing PA maintenance process. This report in part summarizes key information gleaned from more comprehensive documents prepared by Sarkar et al. (2010), Samson (2010), and Sarkar (2010).

  14. Essays in Macroeconomics and Finance

    E-Print Network [OSTI]

    Khramov, Vadim

    2013-01-01T23:59:59.000Z

    economies. ” Journal of Finance 39, pages 77-92. Vasicek,Interest Rate. ” Journal of Finance, Vol. 47, No. 3 Chernov,of Economics. B.A. (Finance), Higher School of Economics.

  15. Essays on Open Economy Macroeconomics

    E-Print Network [OSTI]

    Lu, Mi

    2013-01-01T23:59:59.000Z

    Hong Kong Household House Preference Shock . . . . . PPPnominal depreciation rate (or PPP relationship) is ˆ t+1 ? U1 + ? ?,t Where ? ?,t is PPP shock. PPP shock is very common

  16. Essays on Macroeconomics and Oil

    E-Print Network [OSTI]

    CAKIR, NIDA

    2013-01-01T23:59:59.000Z

    Venezuelan Oil Industry Total Wells Drilled and InvestmentWells Drilled and Investment in the Venezuelan Oil Industryopenness of the oil sector to foreign investment contributes

  17. Essays on Macroeconomics and Oil

    E-Print Network [OSTI]

    CAKIR, NIDA

    2013-01-01T23:59:59.000Z

    reserves. In the data, crude oil reserve addi- tions consistForce and Proven Reserves in the Venezuelan Oil Industry .such as crude oil production, proved reserves, new reserves,

  18. Essays on Macroeconomics and Oil

    E-Print Network [OSTI]

    CAKIR, NIDA

    2013-01-01T23:59:59.000Z

    is described below. Data Crude oil production data is fromproductivity measure is crude oil production per worker, andwhich is measured as crude oil production per worker, is

  19. Essays in Macroeconomics and Finance

    E-Print Network [OSTI]

    Khramov, Vadim

    2013-01-01T23:59:59.000Z

    3, 14, pages 325–332. Huizinga, John and Frederic Mishkin,variables (Mishkin (1981) and Huizinga and Mishkin (1986)).

  20. Essays on Macroeconomics and Oil

    E-Print Network [OSTI]

    CAKIR, NIDA

    2013-01-01T23:59:59.000Z

    Oil Production in Venezuela and Mexico . . . . . . . . . .Oil Production and Productivity in Venezuela and Mexico . . . . . . . .2.6: Oil Production in Venezuela and Mexico 350 Productivity

  1. Essays on Macroeconomics and Oil

    E-Print Network [OSTI]

    CAKIR, NIDA

    2013-01-01T23:59:59.000Z

    the Oil Industry . . . . . . . . . . . . . . . . . . . . . .in the Venezuelan Oil Industry . . . . . . . . . . . . .and Productivity: Evidence from the Oil Industry . .

  2. Essays on Macroeconomics and Oil

    E-Print Network [OSTI]

    CAKIR, NIDA

    2013-01-01T23:59:59.000Z

    Oil Production . . . . . . . . . . . . . . . . . . . . . . . . . . .Oil Production in Venezuela and Mexico . . . . . . . . . .Oil Production and Productivity in Venezuela and

  3. Say's Law and modern macroeconomics

    E-Print Network [OSTI]

    Van Allen, Laurel Cameron

    2013-02-22T23:59:59.000Z

    Many economists have debated the interpretation of what is known as "Say's Law of markets"; it has been the subject of controversy for two centuries. Jean Baptiste Say describes Say's Law by noting that the "success of one branch of commerce...

  4. Computer Modeling Illuminates Degradation Pathways of

    E-Print Network [OSTI]

    Computer Modeling Illuminates Degradation Pathways of Cations in Alkaline Membrane Fuel Cells Cation degradation insights obtained by computational modeling could result in better performance are effective in increasing cation stability. With the help of computational modeling, more cations are being

  5. Using Numerical Simulations to Gain Insight into the Structure of Superbubbles

    E-Print Network [OSTI]

    Philip T. Komljenovic; Shantanu Basu; Doug Johnstone

    1999-01-21T23:59:59.000Z

    Recent high resolution observations of Galactic superbubbles have motivated us to re-examine several classes of superbubble models. We compare three classes of hydrodynamic models (the Kompaneets approximation, the thin shell model, and numerical simulations) in order to understand the structure of superbubbles and to gain insight into observations. In particular, we apply models to the W4 superbubble, which has been observed in the Pilot project of the arcminute resolution Canadian Galactic Plane Survey (Normandeau et al. 1996). Magnetohydrodynamic simulations are also performed and point the way to a fuller understanding of the W4 superbubble. We suggest that the highly collimated bubble and apparent lack of a Rayleigh-Taylor instability in the superbubble shell can be explained by the presence of a magnetic field.

  6. Insights from twenty years of bacterial genome sequencing

    SciTech Connect (OSTI)

    Land, Miriam L [ORNL; Hauser, Loren John [ORNL; Jun, Se Ran [ORNL; Nookaew, Intawat [ORNL; Leuze, Michael Rex [ORNL; Ahn, Tae-Hyuk [ORNL; Karpinets, Tatiana V [ORNL; Lund, Ole [Technical University of Denmark; Kora, Guruprasad H [ORNL; Wassenaar, Trudy [Molecular Microbiology & Genomics Consultants, Zotzenheim, Germany; Poudel, Suresh [ORNL; Ussery, David W [ORNL

    2015-01-01T23:59:59.000Z

    Since the first two complete bacterial genome sequences were published in 1995, the science of bacteria has dramatically changed. Using third-generation DNA sequencing, it is possible to completely sequence a bacterial genome in a few hours and identify some types of methylation sites along the genome as well. Sequencing of bacterial genome sequences is now a standard procedure, and the information from tens of thousands of bacterial genomes has had a major impact on our views of the bacterial world. In this review, we explore a series of questions to highlight some insights that comparative genomics has produced. To date, there are genome sequences available from 50 different bacterial phyla and 11 different archaeal phyla. However, the distribution is quite skewed towards a few phyla that contain model organisms. But the breadth is continuing to improve, with projects dedicated to filling in less characterized taxonomic groups. The clustered regularly interspaced short palindromic repeats (CRISPR)-Cas system provides bacteria with immunity against viruses, which outnumber bacteria by tenfold. How fast can we go? Second-generation sequencing has produced a large number of draft genomes (close to 90 % of bacterial genomes in GenBank are currently not complete); third-generation sequencing can potentially produce a finished genome in a few hours, and at the same time provide methlylation sites along the entire chromosome. The diversity of bacterial communities is extensive as is evident from the genome sequences available from 50 different bacterial phyla and 11 different archaeal phyla. Genome sequencing can help in classifying an organism, and in the case where multiple genomes of the same species are available, it is possible to calculate the pan- and core genomes; comparison of more than 2000 Escherichia coli genomes finds an E. coli core genome of about 3100 gene families and a total of about 89,000 different gene families. Why do we care about bacterial genome sequencing? There are many practical applications, such as genome-scale metabolic modeling, biosurveillance, bioforensics, and infectious disease epidemiology. In the near future, high-throughput sequencing of patient metagenomic samples could revolutionize medicine in terms of speed and accuracy of finding pathogens and knowing how to treat them.

  7. Physiological Insights Towards Improving Fish Culture L. CURRY WOODS III*

    E-Print Network [OSTI]

    Hamza, Iqbal

    Physiological Insights Towards Improving Fish Culture L. CURRY WOODS III* Department of Animal, and American Fisheries Society (AFS) Fish Culture Section, was held February 26 through March 2, 2007, in San Antonio, Texas. At this meeting, the AFS Fish Culture and Fish Physiol- ogy Sections co

  8. Nuclear magnetic resonance offers new insights into Pu 239

    E-Print Network [OSTI]

    - 1 - Nuclear magnetic resonance offers new insights into Pu 239 May 29, 2012 Nuclear magnetic signal of plutonium 239's unique nuclear magnetic resonance signature has been detected by scientists on the subject, "Observation of 239 Pu Nuclear Magnetic Resonance," was published in the May 18 issue of Science

  9. Uncertainty and Predictability in Geophysics: Chaos and Multifractal Insights

    E-Print Network [OSTI]

    Lovejoy, Shaun

    Uncertainty and Predictability in Geophysics: Chaos and Multifractal Insights Daniel Schertzer Department, McGill University, Montreal, Canada Uncertainty and error growth are crosscutting geophysical extremes. The focus is now on time-space geophysical scaling behavior: their multifractality. It is found

  10. Insights from Machine Learning Applied to Human Visual Classification

    E-Print Network [OSTI]

    Insights from Machine Learning Applied to Human Visual Classification Arnulf B. A. Graf and Felix A to understand visual classification in humans using both psy- chophysical and machine learning techniques). On an algorithmic level, however, methods and understanding of brain processes are still limited. Here we report

  11. Insights from Machine Learning Applied to Human Visual Classification

    E-Print Network [OSTI]

    Insights from Machine Learning Applied to Human Visual Classification Arnulf B. A. Graf and Felix A both psy- chophysical and machine learning techniques. Frontal views of human faces were used processes are still limited. Here we report on a study combining psychophysical and ma- chine learning

  12. Social Networks in Health Care: Communication, collaboration and insights

    E-Print Network [OSTI]

    Klein, Ophir

    Social Networks in Health Care: Communication, collaboration and insights Foreword At Chirp, Facebook boasts 400 million users and has created its own unique cyber culture. Social networking is accessed and shared. In this issue brief, we provide a snapshot of social networking's evolution

  13. adolescent brain insights: Topics by E-print Network

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

    adolescent brain insights First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 NEW UNDERSTANDING OF...

  14. Groundwater and global hydrological change current challenges and new insight

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Groundwater and global hydrological change ­ current challenges and new insight R. TAYLOR1 , L Groundwater Resources Assessment Centre, Utrecht, The Netherlands 11 Federal Institute for Geosciences, groundwater plays a critical role in enabling communities to adapt to freshwater shortages derived from low

  15. Dynamical insight into dark-matter haloes

    E-Print Network [OSTI]

    Walter Dehnen; Dean McLaughlin

    2005-06-22T23:59:59.000Z

    We investigate, using the spherical Jeans equation, self-gravitating dynamical equilibria satisfying a relation rho/sigma_r^3 propto r^-alpha, which holds for simulated dark-matter haloes over their whole resolved radial range. Considering first the case of velocity isotropy, we find that this problem has only one solution with realistic density profile, which occurs only for a critical value of alpha_crit = 35/18 ~= 1.94, which is consistent with the empirical value of 1.9+/-0.05. We extend our analysis in two ways: first we introduce a parameter epsilon to allow for a more general relation rho/\\sigma_r^epsilon propto r^-alpha; second we consider velocity anisotropy. If we assume beta(r) := 1- sigma_theta^2 / sigma_r^2 to be linearly related to the logarithmic density slope gamma(r) := -dln(rho)/dln(r), which is in agreement with simulations, the problem remains analytically tractable and is equivalent to the simpler isotropic case: there exists only one physical solution, which occurs at a critical alpha value. Remarkably, this value of alpha and the density and velocity-dispersion profiles depend only on epsilon and the value beta_0 := beta(r=0), but not on the slope of the linear beta-gamma relation. For epsilon=3, alpha_crit = 35/18 - 2beta_0/9 and the resulting density profile is fully analytic (as are the velocity dispersion and circular speed) with an inner cusp rho propto r^{-(7+10beta_0)/9} and a very smooth transition to a steeper outer power-law asymptote. These models are in excellent agreement with the density, velocity-dispersion and anisotropy profiles of simulated dark-matter haloes over their full resolved radial range. If epsilon=3 is a universal constant, some scatter in beta_0 ~= 0 may account for some diversity in the density profiles. (ABRIDGED)

  16. Better Buildings Neighborhood Program Business Models Guide: Executive Summary

    Broader source: Energy.gov [DOE]

    Uses lessons learned from Better Buildings grantees, existing data, and private sector insights to highlight business models that can help develop a sustainable residential energy efficiency market.

  17. Better Buildings Neighborhood Program Business Models Guide: Introduction

    Broader source: Energy.gov [DOE]

    Uses lessons learned from Better Buildings grantees, existing data, and private sector insights to highlight business models that can help develop a sustainable residential energy efficiency market.

  18. Modeling diffusion of electrical appliances in the residential sector

    SciTech Connect (OSTI)

    McNeil, Michael A.; Letschert, Virginie E.

    2009-11-22T23:59:59.000Z

    This paper presents a methodology for modeling residential appliance uptake as a function of root macroeconomic drivers. The analysis concentrates on four major energy end uses in the residential sector: refrigerators, washing machines, televisions and air conditioners. The model employs linear regression analysis to parameterize appliance ownership in terms of household income, urbanization and electrification rates according to a standard binary choice (logistic) function. The underlying household appliance ownership data are gathered from a variety of sources including energy consumption and more general standard of living surveys. These data span a wide range of countries, including many developing countries for which appliance ownership is currently low, but likely to grow significantly over the next decades as a result of economic development. The result is a 'global' parameterization of appliance ownership rates as a function of widely available macroeconomic variables for the four appliances studied, which provides a reliable basis for interpolation where data are not available, and forecasting of ownership rates on a global scale. The main value of this method is to form the foundation of bottom-up energy demand forecasts, project energy-related greenhouse gas emissions, and allow for the construction of detailed emissions mitigation scenarios.

  19. The National Energy Modeling System: An overview 1998

    SciTech Connect (OSTI)

    NONE

    1998-02-01T23:59:59.000Z

    The National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of US energy markets for the midterm period through 2020. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors world energy markets, resource availability and costs, behavior and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. This report presents an overview of the structure and methodology of NEMS and each of its components. The first chapter provides a description of the design and objectives of the system, followed by a chapter on the overall modeling structure and solution algorithm. The remainder of the report summarizes the methodology and scope of the component modules of NEMS. The model descriptions are intended for readers familiar with terminology from economics, operations research, and energy modeling. 21 figs.

  20. Insights from Smart Meters: The Potential for Peak-Hour Savings from Behavior-Based Programs

    E-Print Network [OSTI]

    Todd, Annika

    2014-01-01T23:59:59.000Z

    2014.  Insights from Smart  Meters: The Potential for Peak available data captured by smart meters and other sources,series Insights from Smart Meters. DRAFT – DO NOT CIRCULATE

  1. Understanding Clusters in Multidimensional Spaces: Making Meaning by Combining Insights from Coordinated Views of

    E-Print Network [OSTI]

    Golbeck, Jennifer

    - 1 - Understanding Clusters in Multidimensional Spaces: Making Meaning by Combining Insights from: Cluster Analysis, Interactive Design, Information Visualization, Coordination, Domain Knowledge, Graphical. #12;- 2 - Understanding Clusters in Multidimensional Spaces: Making Meaning by Combining Insights from

  2. A conceptual model to estimate cost effectiveness of the indoor environment improvements

    SciTech Connect (OSTI)

    Seppanen, Olli; Fisk, William J.

    2003-06-01T23:59:59.000Z

    Macroeconomic analyses indicate a high cost to society of a deteriorated indoor climate. The few example calculations performed to date indicate that measures taken to improve IEQ are highly cost-effective when health and productivity benefits are considered. We believe that cost-benefit analyses of building designs and operations should routinely incorporate health and productivity impacts. As an initial step, we developed a conceptual model that shows the links between improvements in IEQ and the financial gains from reductions in medical care and sick leave, improved work performance, lower employee turn over, and reduced maintenance due to fewer complaints.

  3. DNA MOLECULAR WIRE-BASED NANOELECTRONICS: NEW INSIGHT AND HIGH FREQUENCY AC ELECTRICAL

    E-Print Network [OSTI]

    Kassegne, Samuel Kinde

    DNA MOLECULAR WIRE-BASED NANOELECTRONICS: NEW INSIGHT AND HIGH FREQUENCY AC ELECTRICAL the Thesis of Denni Ari Wibowo: DNA Molecular Wire-Based Nanoelectronics: New Insight and High Frequency AC alone. #12;v ABSTRACT OF THE THESIS DNA Molecular Wire-Based Nanoelectronics: New Insight and High

  4. Qualification for PowerInsight accuracy of power measurements.

    SciTech Connect (OSTI)

    DeBonis, David; Laros, James H.,; Pedretti, Kevin Thomas Tauke

    2013-11-01T23:59:59.000Z

    Accuracy of component based power measuring devices forms a necessary basis for research in the area of power-e cient and power-aware computing. The accuracy of these devices must be quanti ed within a reasonable tolerance. This study focuses on PowerInsight, an out- of-band embedded measuring device which takes readings of power rails on compute nodes within a HPC system in realtime. We quantify how well the device performs in comparison to a digital oscilloscope as well as PowerMon2. We show that the accuracy is within a 6% deviation on measurements under reasonable load.

  5. Los Alamos offers new insights into radiation damage evolution

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

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

  6. Collective excitations and thermodynamics of disordered state: new insights into an old problem

    E-Print Network [OSTI]

    V. V. Brazhkin; K. Trachenko

    2014-08-27T23:59:59.000Z

    Disorder has been long considered as a formidable foe of theoretical physicists in their attempts to understand system's behavior. Here, we review recently accumulated data and propose that from the point of view of calculating thermodynamic properties, the problem of disorder may not be as severe as has been hitherto assumed. We particularly emphasize that contrary to the long-held view, collective excitations do not decay in disordered systems. We subsequently discuss recent experimental, theoretical and modelling results related to collective excitations in disordered media, and show how these results pave the way to understanding thermodynamics of disordered systems: glasses, liquids, supercritical fluids and spin glasses. An interesting insight from the recent work is the realization that most important changes of thermodynamic properties of the disordered system are governed only by its fundamental length, the interatomic separation. We discuss how the proposed theory relates to the previous approaches based on general many-body statistical mechanics framework.

  7. Voices of Experience | Insights into Advanced Distribution Management Systems

    Broader source: Energy.gov [DOE]

    The American Recovery and Reinvestment Act (ARRA) of 2009 spurred investments in smart grid technology and programs at utilities across the country. In 2011, the Office of Electricity Delivery and Energy Reliability (OE), in partnership with electric utilities that received ARRA funds, convened a series of Regional Smart Grid Peer-to-Peer Workshops. These were designed to bring together utilities to engage in dialogues about the most compelling smart grid topics in each region. In February 2014, OE formed the Advanced Distribution Management Systems (ADMS) Working Group by assembling a leadership team of representatives from the utility industry with the mission to collect the experiences, insights, and lessons learned from implementing these systems. This Voices of Experience | Insights into Advanced Distribution Management Systems report is the result of a one-day meeting held at CenterPoint Energy in Houston, Texas, in May 2014 that was followed by a series of conference calls about specific aspects of ADMS, interviews with individuals leading ADMS projects at their utilities, and a final small group meeting at San Diego Gas & Electric in California in October 2014.

  8. Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar (PREDICTS) Funding Opportunity

    Broader source: Energy.gov [DOE]

    The Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar (PREDICTS) program supports projects that evaluate the degradation and failure mechanisms of concentrating...

  9. Nonclassicality Phase-Space Functions: More Insight with Fewer Detectors

    E-Print Network [OSTI]

    A. Luis; J. Sperling; W. Vogel

    2015-03-17T23:59:59.000Z

    Systems of on-off detectors are well established for measuring radiation fields in the regime of small photon numbers. We propose to combine these detector systems with unbalanced homodyning with a weak local oscillator. This approach yields phase-space functions, which represent the click counterpart of the s parametrized quasiprobabilities of standard photoelectric detection theory. This introduced class of distributions can be directly sampled from the measured click counting statistics. Therefore, our technique visualizes nonclassical effects without further data processing. Surprisingly, a small number of on-off diodes can yield more insight than perfect photon number resolution. Quantum signatures in the particle and wave domain of the quantized radiation field, as shown by photon number and squeezed states, respectively, will be uncovered in terms of negativities of the sampled phase-space functions. Application in the vast fields of quantum optics and quantum technology will benefit from our efficient nonclassicality characterization approach.

  10. Studies of Neurological Transmission Analysis Hierarchical Bayesian Mixture Models

    E-Print Network [OSTI]

    West, Mike

    Studies of Neurological Transmission Analysis using Hierarchical Bayesian Mixture Models MIKE WEST of individual neuro­ transmitter release sites at nerve junctions. Models attempt to capture scientific features, with result­ ing neurophysiological insights in some recently generated experimental contexts. Further

  11. Sudhakar Yedla* and Sarika Kansal Economic insight into municipal solid waste

    E-Print Network [OSTI]

    Columbia University

    Sudhakar Yedla* and Sarika Kansal Economic insight into municipal solid waste management in Mumbai: a critical analysis 511 " Economic insight into solid waste management Conventional MSW management fails metropolitan city in India, presents the most critical solid waste management system in India. The present

  12. The stable isotope amount effect: New insights from NEXRAD echo tops, Luquillo Mountains, Puerto Rico

    E-Print Network [OSTI]

    . Rain and cloud water isotope collectors in the Luquillo Mountains in northeastern Puerto Rico were isotope amount effect: New insights from NEXRAD echo tops, Luquillo Mountains, Puerto Rico, Water ResourThe stable isotope amount effect: New insights from NEXRAD echo tops, Luquillo Mountains, Puerto

  13. Thunderstorm lightning and radar characteristics: insights on electrification and severe weather forecasting

    E-Print Network [OSTI]

    Steiger, Scott Michael

    2007-04-25T23:59:59.000Z

    THUNDERSTORM LIGHTNING AND RADAR CHARACTERISTICS: INSIGHTS ON ELECTRIFICATION AND SEVERE WEATHER FORECASTING A Dissertation by SCOTT MICHAEL STEIGER Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2005 Major Subject: Atmospheric Sciences THUNDERSTORM LIGHTNING AND RADAR CHARACTERISTICS: INSIGHTS ON ELECTRIFICATION AND SEVERE WEATHER...

  14. Some insight on why Bam (Iran) was destroyed by an earthquake of relatively moderate size

    E-Print Network [OSTI]

    Hatzfeld, Denis

    Some insight on why Bam (Iran) was destroyed by an earthquake of relatively moderate size Michel March 2006; accepted 29 March 2006; published 13 May 2006. [1] The Bam (Iran) earthquake of 2003. Hatzfeld, J. A. Jackson, and E. Haghshenas (2006), Some insight on why Bam (Iran) was destroyed

  15. NREL Highlights SCIENCE Research provides insight for exploring use of Earth-

    E-Print Network [OSTI]

    NREL Highlights SCIENCE Research provides insight for exploring use of Earth- abundant quaternary, it is critical to find new material that is Earth abundant and easily manufactured. Previous experimental studies This research provides insight for exploring use of Earth-abundant quaternary semiconductors for large

  16. Making Sustainable Energy Choices: Insights on the Energy/Water/Land Nexus

    SciTech Connect (OSTI)

    Not Available

    2014-10-01T23:59:59.000Z

    This periodic publication summarizes insights from the body of NREL analysis work. In this issue of Analysis Insights, we examine the implications of our energy choices on water, land use, climate, developmental goals, and other factors. Collectively, NREL's work helps policymakers and investors understand and evaluate energy choices within the complex web of connections, or nexus, between energy, water, and land.

  17. Generic risk insights for General Electric boiling water reactors

    SciTech Connect (OSTI)

    Travis, R.; Taylor, J. (Brookhaven National Lab., Upton, NY (USA)); Chung, J. (Nuclear Regulatory Commission, Washington, DC (USA). Office of Nuclear Reactor Regulation)

    1991-05-01T23:59:59.000Z

    A methodology has been developed to extract generic risk-based information from probabilistic risk assessments (PRAs) of General Electric boiling water rectors and applying the insights gained to plants that have not been subjected to a PRA. The available risk assessments (six plants) were examined to identify the most probable, i.e., dominant accident sequences at each plants. The goal was to include all sequences which represented at least 80% of core damage frequency. If the same plant specific dominant accident sequence appeared within this boundary in at least two plant PRAs, the sequence was considered to be a representative sequence. Eight sequences met this definition. From these sequences, the most important component failures and human error that contributed to each sequence have been prioritized. Guidance is provided to prioritize the representative sequences and modify selected basic events that have been shown to be sensitive to the plant specific design or operating variations of the contributing PRAs. This risk-based guidance can be used for utility and NRC activities including operator training, maintenance, design review, and inspections. 13 refs., 6 tabs.

  18. Delivering Insight The History of the Accelerated Strategic Computing Initiative

    SciTech Connect (OSTI)

    Larzelere II, A R

    2007-01-03T23:59:59.000Z

    The history of the Accelerated Strategic Computing Initiative (ASCI) tells of the development of computational simulation into a third fundamental piece of the scientific method, on a par with theory and experiment. ASCI did not invent the idea, nor was it alone in bringing it to fruition. But ASCI provided the wherewithal - hardware, software, environment, funding, and, most of all, the urgency - that made it happen. On October 1, 2005, the Initiative completed its tenth year of funding. The advances made by ASCI over its first decade are truly incredible. Lawrence Livermore, Los Alamos, and Sandia National Laboratories, along with leadership provided by the Department of Energy's Defense Programs Headquarters, fundamentally changed computational simulation and how it is used to enable scientific insight. To do this, astounding advances were made in simulation applications, computing platforms, and user environments. ASCI dramatically changed existing - and forged new - relationships, both among the Laboratories and with outside partners. By its tenth anniversary, despite daunting challenges, ASCI had accomplished all of the major goals set at its beginning. The history of ASCI is about the vision, leadership, endurance, and partnerships that made these advances possible.

  19. National Energy Modeling System (NEMS)

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

    The National Energy Modeling System (NEMS) is a computer-based, energy-economy modeling system of U.S. through 2030. NEMS projects the production, imports, conversion, consumption, and prices of energy, subject to assumptions on macroeconomic and financial factors, world energy markets, resource availability and costs, behavioral and technological choice criteria, cost and performance characteristics of energy technologies, and demographics. NEMS was designed and implemented by the Energy Information Administration (EIA) of the U.S. Department of Energy (DOE). NEMS can be used to analyze the effects of existing and proposed government laws and regulations related to energy production and use; the potential impact of new and advanced energy production, conversion, and consumption technologies; the impact and cost of greenhouse gas control; the impact of increased use of renewable energy sources; and the potential savings from increased efficiency of energy use; and the impact of regulations on the use of alternative or reformulated fuels. NEMS has also been used for a number of special analyses at the request of the Administration, U.S. Congress, other offices of DOE and other government agencies, who specify the scenarios and assumptions for the analysis. Modules allow analyses to be conducted in energy topic areas such as residential demand, industrial demand, electricity market, oil and gas supply, renewable fuels, etc.

  20. Intuition and Insight: A New Job Description for the Battered Woman's Prosecutor and Other More Modest Proposals

    E-Print Network [OSTI]

    Mills, Linda G.

    1997-01-01T23:59:59.000Z

    PROSECUTOR AND OTHER MORE MODEST PROPOSALS Linda G. Mills*insight suggested by the more modest proposal. Instead, it

  1. Energy metabolism in Desulfovibrio vulgaris Hildenborough: insights from transcriptome analysis

    SciTech Connect (OSTI)

    Pereira, Patricia M.; He, Qiang; Valente, Filipa M.A.; Xavier, Antonio V.; Zhou, Jizhong; Pereira, Ines A.C.; Louro, Ricardo O.

    2007-11-01T23:59:59.000Z

    Sulphate-reducing bacteria are important players in the global sulphur and carbon cycles, with considerable economical and ecological impact. However, the process of sulphate respiration is still incompletely understood. Several mechanisms of energy conservation have been proposed, but it is unclear how the different strategies contribute to the overall process. In order to obtain a deeper insight into the energy metabolism of sulphate-reducers whole-genome microarrays were used to compare the transcriptional response of Desulfovibrio vulgaris Hildenborough grown with hydrogen/sulphate, pyruvate/sulphate, pyruvate with limiting sulphate, and lactate/thiosulphate, relative to growth in lactate/sulphate. Growth with hydrogen/sulphate showed the largest number of differentially expressed genes and the largest changes in transcript levels. In this condition the most up-regulated energy metabolism genes were those coding for the periplasmic [NiFeSe]hydrogenase, followed by the Ech hydrogenase. The results also provide evidence for the involvement of formate cycling and the recently proposed ethanol pathway during growth in hydrogen. The pathway involving CO cycling is relevant during growth on lactate and pyruvate, but not during growth in hydrogen as the most down-regulated genes were those coding for the CO-induced hydrogenase. Growth on lactate/thiosulphate reveals a down-regulation of several energymetabolism genes similar to what was observed in the presence of nitrite. This study identifies the role of several proteins involved in the energy metabolism of D. vulgaris and highlights several novel genes related to this process, revealing a more complex bioenergetic metabolism than previously considered.

  2. Insights into the structure of mixed CO2/CH4 in gas hydrates

    SciTech Connect (OSTI)

    Everett, Susan M [ORNL; Rawn, Claudia J [ORNL; Chakoumakos, Bryan C [ORNL; Keffer, David J. [University of Tennessee, Knoxville (UTK); Huq, Ashfia [ORNL; Phelps, Tommy Joe [ORNL

    2015-01-01T23:59:59.000Z

    The exchange of CO2 for CH4 in natural gas hydrates is an attractive approach to methane for energy production while simultaneously sequestering CO2. In addition to the energy and environmental implications, the solid solution of clathrate hydrate (CH4)1-x(CO2)x 5.75H2O provides a model system to study how the distinct bonding and shapes of CH4 and CO2 influence the structure and properties of the compound. High-resolution neutron diffraction was used to examine mixed CO2/CH4 gas hydrates. CO2-rich hydrates had smaller lattice parameters, which were attributed to the higher affinity of the CO2 molecule interacting with H2O molecules that form the surrounding cages, and resulted in a reduction in the unit cell volume. Experimental nuclear scattering densities illustrate how the cage occupants and energy landscape change with composition. These results provide important insights on the impact and mechanisms for exchanging CH4 and CO2.

  3. Evolutionary history and metabolic insights of ancient mammalian uricases

    E-Print Network [OSTI]

    Gaucher, Eric

    causing gout. We have applied evolutionary models to understand the history of primate uricases of treating gout and preventing tumor lysis syndrome in human patients. hyperuricemia | pseudogene | evolution

  4. Comment on 'New Insights in the Electrocatalytic Proton Reduction...

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

    investigation of the mechanism of oxidation of H2 proton reduction using a model nickel complex for nickel-based electrocatalysts with cyclic phosphorous ligands...

  5. Physics of Reliability: Evaluating Design Insights for Component...

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

    seal (DGS) components in the turboexpander of a supercritical CO2 turbine. The Bayesian model is to include phase changes, low cycle fatiguehigh cycle fatigue, dynamic...

  6. Technology and society : some insights on the development of metallurgy in the Southern Levant in the light of new dates of slag deposits

    E-Print Network [OSTI]

    Ben-Yosef, Erez

    2008-01-01T23:59:59.000Z

    CALIFORNIA, SAN DIEGO Technology and Society: Some InsightsOF THE THESIS Technology and Society: Some insights on theinteraction between technology and society in the past. For

  7. Essays on Macroeconomics and International Finance

    E-Print Network [OSTI]

    Wang, Gewei

    2012-01-01T23:59:59.000Z

    investment flows. Journal of Finance 52(5):1851–80. Calvo,mutual funds. Journal of Finance 45(2):497–521. Dvo?r´ak,Indonesia. Journal of Finance 60(2):817–839. Eichenbaum,

  8. Essays in International Finance and Macroeconomics

    E-Print Network [OSTI]

    Maggiori, Matteo

    2012-01-01T23:59:59.000Z

    In that case, the Home SDF would also feature an additionaltwo stochastic discount factors (SDF), one for each country,1 R t+1 where ? t+1 is the US SDF, and R t+1 is any US asset

  9. Natural gas exports and macroeconomic performance

    SciTech Connect (OSTI)

    Naini, A. [Alberta Energy and Utilities Board, Calgary, Alberta (Canada). Economics and Policy Development

    1998-08-01T23:59:59.000Z

    Alberta, in volumetric terms, is Canada`s leading exporter of natural gas, crude oil, bitumen, and coal. Alberta natural gas shipments to other Canadian provinces and exports to the United States have developed into an increasingly important component of Alberta economy. This article attempts to measure the impact of gas production and exports on different sectors of the Alberta economy as the energy producing province of Canada.

  10. Macroeconomic Implications of the Zero Lower Bound

    E-Print Network [OSTI]

    Wieland, Johannes Friedrich

    2013-01-01T23:59:59.000Z

    A.10 Oil Shocks in Incomplete Markets . . . . . . . .shocks in the crude oil market,” The American Economicin the Global Market for Crude Oil,” 2011. Kim, Jinill and

  11. Essays on Macroeconomics and International Finance

    E-Print Network [OSTI]

    Wang, Gewei

    2012-01-01T23:59:59.000Z

    Production function, inventory, and goods demand . . .channel and inventory behavior . . . . . . . . . . . . . .inventories . . . . . . . . . . . . . . . . . . . . . . . . . . .

  12. Essays on macroeconomics and international trade

    E-Print Network [OSTI]

    Mestieri, Martí (Mestieri Ferre)

    2011-01-01T23:59:59.000Z

    This thesis focuses on the study of different aspects of income inequality across and within countries. In the first chapter, I study how the optimal provision of human capital is distorted in the presence of borrowing ...

  13. Term Structure Dynamics with Macroeconomic Factors

    E-Print Network [OSTI]

    Park, Ha-Il

    2011-02-22T23:59:59.000Z

    (1985), researchers extended ATSMs to explain several important aspects of Treasury yields data. Recently, Dai and Singleton (2000), Du ee (2002), and Duarte (2004) reported that there exists a trade-o between improving forecast ability on future bond... be one way to resolve these issues. Along this line, Du ee (2002) and Duarte (2004) use alternative parameterizations of the market price of risk and report some success in increasing the predictive power of ATSMs, but they still have di culty...

  14. Essays on Macroeconomics and Information Economics

    E-Print Network [OSTI]

    Zambrano Riveros, Jorge Andres

    2012-01-01T23:59:59.000Z

    on-Hudson, NY: Levy Economics Institute, Bard College, 2010.Journal of Labor Economics, 7(3):281–302, 1989. [4] S.N.Quarterly Jour- nal of Economics, 109(3):659, 1994. [6] Y.

  15. Essays on frictions in financial macroeconomics

    E-Print Network [OSTI]

    Kay, Benjamin S.

    2012-01-01T23:59:59.000Z

    3.2.4 Multivariate GARCH . . . . . . . . . . . . . . . . .productivity: DCC-GARCH . . . . . . . 87 US conditionalquarterly growth volatility: GARCH(1,1) . . . . . . 85 Ratio

  16. Essays on frictions in financial macroeconomics

    E-Print Network [OSTI]

    Kay, Benjamin S.

    2012-01-01T23:59:59.000Z

    94 (1), Lucas, Robert E. , “Econometric Policy Evaluation: Aorder flow based econometric measurements of spread

  17. Essays on the macroeconomics of economic development

    E-Print Network [OSTI]

    Peters, Michael

    2012-01-01T23:59:59.000Z

    Chapter 1 contains a theory of misallocation. In contrast to a recent literature where misallocation stems from imperfect input markets, I study an economy with non-competitive output markets. This change of focus has two ...

  18. Essays in macroeconomics : information and financial markets

    E-Print Network [OSTI]

    Iovino, Luigi

    2012-01-01T23:59:59.000Z

    This thesis studies how information imperfections affect financial markets and the macroeconomy. Chapter 1 considers an economy where investors delegate their investment decisions to financial institutions that choose ...

  19. Complexity within the Air Force acquisition system gaining insight from a theory of collapse

    E-Print Network [OSTI]

    Marticello, Daniel Nicholas, Jr

    2012-01-01T23:59:59.000Z

    Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both ...

  20. Structure and evolution of the Australian continent : insights from seismic and mechanical heterogeneity and anisotropy

    E-Print Network [OSTI]

    Simons, Frederik Jozef Maurits, 1974-

    2002-01-01T23:59:59.000Z

    In this thesis, I explore the geophysical structure and evolution of the Australian continental lithosphere. I combine insights from isotropic and anisotropic seismic surface-wave tomography with an analysis of the anisotropy ...

  1. Insights into the historical construction of species-rich Mesoamerican seasonally dry tropical forests: the diversification

    E-Print Network [OSTI]

    Olson, Mark

    Insights into the historical construction of species-rich Mesoamerican seasonally dry tropical, Mesoamerica, niche conservatism, seasonally dry tropical forests. Summary · Mesoamerican arid biomes epitomize the vast species richness of Meso- american seasonally dry tropical forests (SDTFs), and to evaluate

  2. Insights into the Mechanism of Fe(II) Adsorption and Oxidation...

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

    Mechanism of Fe(II) Adsorption and Oxidation at Fe-Clay Mineral Surfaces from First-Principles Calculations. Insights into the Mechanism of Fe(II) Adsorption and Oxidation at...

  3. Insights On The Thermal History Of The Valles Caldera, New Mexico...

    Open Energy Info (EERE)

    Insights On The Thermal History Of The Valles Caldera, New Mexico- Evidence From Zircon Fission-Track Analysis Jump to: navigation, search OpenEI Reference LibraryAdd to library...

  4. GTPase Catalysis by Ras and Other G-proteins: Insights from Substrate Directed SuperImposition

    E-Print Network [OSTI]

    Kosloff, Mickey

    GTPase Catalysis by Ras and Other G-proteins: Insights from Substrate Directed Super usage of similar approaches to comparison of enzyme catalytic machineries. We applied SDSI to various G catalysis; GTPase; guanine nucleotides; conformational rearrangement; structure comparison

  5. The nature of fire-cracked rock: new insights from ethnoarchaeological and laboratory experiments

    E-Print Network [OSTI]

    Jackson, Michael A

    1998-01-01T23:59:59.000Z

    thermal weathering better than metamorphic or sedimentary rock types. Ethnoarchaeological results are applied to six archaeological FCR features, and provide new insights on the use-history of five of the features. Microscopic observations...

  6. Cognitive Emotion Regulation Insights From Social Cognitive and Affective Neuroscience

    E-Print Network [OSTI]

    Ochsner, Kevin

    . Imaging studies have con- tributed to the development of a multilevel model of emo- tion regulation in emotional control. In this article, we review imaging studies of one type of cognitive emotion regulation understanding of cognitive emotion regulation. MULTILEVEL MODELS One tenet of SCAN research is that behavior

  7. Language acquisition and implication for language change: A computational model

    E-Print Network [OSTI]

    Clark, Robert A J

    1997-01-01T23:59:59.000Z

    Computer modeling techniques, when applied to language acquisition problems, give an often unrealized insight into the diachronic change that occurs in language over successive generations. This paper shows that using ...

  8. Documentation of the DRI Model of the US economy, December 1993

    SciTech Connect (OSTI)

    Not Available

    1994-02-28T23:59:59.000Z

    The Energy Information Administration (EIA) uses models of the US economy developed by Data Resources, Inc. (DRI) for conducting policy analyses, preparing forecasts for the Annual Energy Outlook, the Short-Term Energy Outlook, and related analyses in conjunction with EIA`s National Energy Modeling System (NEMS) and its other energy market models. Both the DRI Model of the US Economy and the DRI Personal Computer Input-Output Model (PC-IO){sup 2} were developed and are maintained by DRI as proprietary models. This report provides documentation, as required by EIA standards for the use of proprietary models; describes the theoretical basis, structure and functions of both DRI models; and contains brief descriptions of the models and their equations. Appendix A describes how the two large-scale models documented here are used to support the macroeconomic and interindustry modeling associated with the National Energy Modeling System. Appendix B is an article by Stephen McNees of the Federal Reserve Bank of Boston on ``How Large are Economic Forecast Errors.`` This article assesses the forecast accuracy of a number of economic forecasting models (groups) and is attached as an independent assessment of the forecast accuracy of the DRI Model of the US Economy.

  9. Development of Risk Insights for Regulatory Review of a Near-Surface Disposal Facility for Radioactive Waste

    SciTech Connect (OSTI)

    Esh, D.W.; Ridge, A.C.; Thaggard, M. [U.S. Nuclear Regulatory Commission, Mail Stop T7J8, Washington, DC 20555 (United States)

    2006-07-01T23:59:59.000Z

    Section 3116 of the Ronald W. Reagan National Defense Authorization Act for Fiscal Year 2005 (NDAA) requires the Department of Energy (DOE) to consult with the Nuclear Regulatory Commission (NRC) about non-High Level Waste (HLW) determinations. In its consultative role, NRC performs technical reviews of DOE's waste determinations but does not have regulatory authority over DOE's waste disposal activities. The safety of disposal is evaluated by comparing predicted disposal facility performance to the performance objectives specified in NRC regulations for the disposal of low-level waste (10 CFR Part 61 Subpart C). The performance objectives contain criteria for protection of the public, protection of inadvertent intruders, protection of workers, and stability of the disposal site after closure. The potential radiological dose to receptors typically is evaluated with a performance assessment (PA) model that simulates the release of radionuclides from the disposal site, transport of radionuclides through the environment, and exposure of potential receptors to residual contamination for thousands of years. This paper describes NRC's development and use of independent performance assessment modeling to facilitate review of DOE's non-HLW determination for the Saltstone Disposal Facility (SDF) at the Savannah River Site. NRC's review of the safety of near-surface disposal of radioactive waste at the SDF was facilitated and focused by risk insights developed with an independent PA model. The main components of NRC's performance assessment model are presented. The development of risk insights that allow the staff to focus review efforts on those areas that are most important to satisfying the performance objectives is discussed. Uncertainty analysis was performed of the full stochastic model using genetic variable selection algorithms. The results of the uncertainty analysis were then used to guide the development of simulations of other scenarios to understand the key risk drivers and risk limiters of the SDF. Review emphasis was placed on those aspects of the disposal system that were expected to drive performance: the physical and chemical performance of the cementitious wasteform and concrete vaults. Refinement of the modeling of the degradation and release from the cementitious wasteform had a significant effect on the predicted dose to a member of the public. (authors)

  10. A Model for Contingent Manpower Planning: Insights from a High Clock Speed Industry

    E-Print Network [OSTI]

    Bhatnagar, Rohit

    Intense competitive pressures have led to compressed product life cycles and frequent introduction of new products. This creates demand volatility and a consequent pressure on manufacturing to meet this variable demand. ...

  11. Syn-collisional delamination in convergent orogens: insights from lithospheric buoyancy and physical modeling 

    E-Print Network [OSTI]

    Moore, Vernon Michael

    2002-01-01T23:59:59.000Z

    Delamination of the lower crust and lithospheric mantle has occurred in several orogens during convergence, most notably the Alps and Pyrenees. The factors responsible for initiating the delamination are not clear. Some workers suggest...

  12. Insights into Conventional and Low Temperature Diesel Combustion Using Combustion Trajectory Prediction Model

    E-Print Network [OSTI]

    Bittle, Joshua A

    2014-04-18T23:59:59.000Z

    ...................................................................................................... 20 2.3 Gas entrainment (original) ............................................................................... 21 2.4 Gas entrainment (improvement)....................................................................... 23 2.5 Fuel consumption... and radiator configuration ................................................. 115 8.1.4 Fuel delivery and measurement system configuration ............................... 116 vi 8.1.5 Engine controller and data acquisition hardware...

  13. Modeling of a human circadian mutation yields insights into clock regulation by PER2

    E-Print Network [OSTI]

    Xu, Y; Toh, K L; Jones, C R; Shin, J Y; Fu, Y H; Ptacek, L J

    2007-01-01T23:59:59.000Z

    in transgenic mice. Genotypes S-G S-D WT S-G/mPer2 ldc S-D/mPer2 ldc mPer2ldc S-G/S-G N= Period (Hours) SDonto a homozygous mPer2 ldc (15) background (-/-, tg+).

  14. Transition from static to kinetic friction: Insights from a 2D model J. Trmborg,1

    E-Print Network [OSTI]

    Boyer, Edmond

    a satisfactory pic- ture of the steady sliding regime of such interfaces has been developed during the last sliding occurs only after shear crack-like micro-slip fronts have spanned the entire contact interface point in side-driven systems [11, 14, 16, 18] or by a friction-induced pressure asym- metry in top

  15. Transition from static to kinetic friction: insights from a 2D model J. Trmborg,1

    E-Print Network [OSTI]

    ] and nanomechanics [4]. Whereas a satisfactory pic- ture of the steady sliding regime of such interfaces has been shown that macro- scopic sliding occurs only after shear crack-like micro-slip fronts have spanned near the loading point in side-driven systems [10, 13, 15, 17] or by a friction-induced pressure asym

  16. New Insight into Integrated Reservoir Management using Top-Down, Intelligent Reservoir Modeling

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    ;Introduction · Can be used as an alternative to traditional reservoir simulation ­ Cost ­ Man Power · May · Time and resources required : Only a small fraction performing a conventional reservoir simulation is basis for estimation of initial and remaining hydrocarbons volumes in the reservoir. · Results obtained

  17. Simultaneous activation of multiple memory systems during learning : insights from electrophysiology and modeling

    E-Print Network [OSTI]

    Thorn, Catherine A. (Catherine Ann), 1980-

    2010-01-01T23:59:59.000Z

    Parallel cortico-basal ganglia loops are thought to give rise to a diverse set of limbic, associative and motor functions, but little is known about how these loops operate and how their neural activities evolve during ...

  18. Water Vapor Variability Across Spatial Scales: Insights for Theory, Parameterization, and Model Assessment

    E-Print Network [OSTI]

    Pressel, Kyle Gregory

    2012-01-01T23:59:59.000Z

    The best fitting power laws are shown as solid lines. Dottedbest fitting power laws are shown as solid lines. VerticalThe best fitting power laws are shown as solid lines. Dotted

  19. Transform faults and lithospheric structure : insights from numerical models and shipboard and geodetic observations

    E-Print Network [OSTI]

    Takeuchi, Christopher S.

    2012-01-01T23:59:59.000Z

    3.8)- Parkfield, the Elk Hills, and the San Joaquin Valley [Parkfield San Joaquin Valley Elk Hills DCS WCS Distance from

  20. Up to what temperature is petroleum stable? New insights from a 5200 free radical reactions model

    E-Print Network [OSTI]

    Domine, Florent

    ´ (1975). That approach was initially intended to describe and predict oil generation from source rocks and accelerators, and to a composition representing a light mature oil. From the results obtained, we conclude that mature oils will be stable up to 240­260 C, depending on their composition, and that the thermal

  1. Forest fire management in Portugal : developing system insights through models of social and physical dynamics

    E-Print Network [OSTI]

    Collins, Ross D. (Ross Daniel)

    2012-01-01T23:59:59.000Z

    Managing forest fires is a serious national problem in Portugal. Burned area has increased steadily over the past several decades, with particularly devastating years in 2003 and 2005. Ignitions also spike dramatically in ...

  2. Syn-collisional delamination in convergent orogens: insights from lithospheric buoyancy and physical modeling

    E-Print Network [OSTI]

    Moore, Vernon Michael

    2002-01-01T23:59:59.000Z

    with depth in various crustal provinces based on P-wave velocity data. 53 11 Geotherms for continental lithosphere with a 30. 5 km thick crust. . . 12 Net buoyant mass within the lithosphere for various geotherms. . . . . 56 13 Net buoyant mass... continental margins are not the cause of delamination and wedge development because both margins are likely to be irregular. Instead, the over-riding plate is proposed to thicken during convergence, thus reducing the geotherm and increasing and deepening...

  3. Baffin Island snow extent sensitivity: Insights from a regional climate model

    E-Print Network [OSTI]

    Robock, Alan

    in both timing and degree. In the Arctic, the LIA caused expansion of ice caps and glaciers Baffin Island suggests that a sudden expansion of ice caps began soon after a succession of several large., 2009; Zhong et al., 2010; Miller et al., 2012]. The ice sheets did not start to melt until roughly

  4. Hybrid Electric Vehicle End-Of-Life Testing On Honda Insights, Gen I Civics And Toyota Gen I Priuses

    SciTech Connect (OSTI)

    James Francfort; Donald Karner; Ryan Harkins; Joseph Tardiolo

    2006-02-01T23:59:59.000Z

    This technical report details the end-of-life fuel efficiency and battery testing on two model year 2001 Honda Insight hybrid electric vehicles (HEVs), two model year 2003 Honda Civic HEVs, and two model year 2002 Toyota Prius HEVs. The end-of-life testing was conducted after each vehicle has been operated for approximately 160,000 miles. This testing was conducted by the U.S. Department of Energy’s (DOE) Advanced Vehicle Testing Activity (AVTA). The AVTA is part of DOE’s FreedomCAR and Vehicle Technologies Program. SAE J1634 fuel efficiency testing was performed on the six HEVs with the air conditioning (AC) on and off. The AC on and off test results are compared to new vehicle AC on and off fuel efficiencies for each HEV model. The six HEVs were all end-of-life tested using new-vehicle coast down coefficients. In addition, one of each HEV model was also subjected to fuel efficiency testing using coast down coefficients obtained when the vehicles completed 160,000 miles of fleet testing. Traction battery pack capacity and power tests were also performed on all six HEVs during the end-of-life testing in accordance with the FreedomCAR Battery Test Manual For Power-Assist Hybrid Electric Vehicles procedures. When using the new-vehicle coast down coefficients (Phase I testing), 11 of 12 HEV tests (each HEV was tested once with the AC on and once with the AC off) had increases in fuel efficiencies compared to the new vehicle test results. The end-of-life fuel efficiency tests using the end-of-life coast down coefficients (Phase II testing) show decreases in fuel economies in five of six tests (three with the AC on and three with it off). All six HEVs experienced decreases in battery capacities, with the two Insights having the highest remaining capacities and the two Priuses having the lowest remaining capacities. The AVTA’s end-of-life testing activities discussed in this report were conducted by the Idaho National Laboratory; the AVTA testing partner Electric Transportation Applications, and by Exponent Failure Analysis Associates.

  5. Insight in the Brain: The Cognitive and Neural Bases of Eureka Moments

    SciTech Connect (OSTI)

    Beeman, Mark [Northwestern University

    2013-04-03T23:59:59.000Z

    Where do new ideas come from? Although all new ideas build on old, this can happen in different ways. Some new ideas, or solutions to old problems, are achieved through methodical, analytical processing. Other new ideas come about in a sudden burst of insight, often based on or generating a restructured view of the problem itself. Behavioral, brain imaging, and eye-tracking results all reveal distinct cortical networks contributing to insight solving, as contrasted with analytic solving. Consistently, the way in which people solve problems appears to relate to the way they engage attention and cognitive control: across time, across moods, and across individuals. Insight is favored when people can disengage from strong stimuli and associations - figuratively and literally looking "outside the box" of the problem to suddenly solve with a new idea.

  6. U.S. Solar Market Insight®: 2014 Year In Review (Executive Summary)

    Broader source: Energy.gov [DOE]

    U.S. Solar Market Insight is a quarterly publication of the Solar Energy Industries Association (SEIA)® and GTM Research. Each quarter, they survey nearly 200 installers, manufacturers, utilities, and state agencies to collect granular data on photovoltaic (PV) and concentrating solar. These data provide the backbone of the Solar Market Insight report, in which they identify and analyze trends in U.S. solar demand, manufacturing, and pricing by state and market segment. This analysis also forecasts demand over the next five years. As the U.S. solar market expands, it is the hope that Solar Market Insight will provide an invaluable decision-making tool for installers, suppliers, investors, policymakers, and advocates alike.

  7. FRESH INSIGHTS ON THE STRUCTURE OF THE SOLAR CORE

    SciTech Connect (OSTI)

    Basu, Sarbani [Department of Astronomy, Yale University, P.O. Box 208101, New Haven, CT 06520-8101 (United States); Chaplin, William J.; Elsworth, Yvonne [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); New, Roger [Faculty of Arts, Computing, Engineering and Sciences, Sheffield Hallam University, Sheffield S1 1WB (United Kingdom); Serenelli, Aldo M. [Max Planck Institute for Astrophysics K. Schwarzschild Str. 1, Garching, D-85471 (Germany)], E-mail: sarbani.basu@yale.edu, E-mail: w.j.chaplin@bham.ac.uk, E-mail: y.p.elsworth@bham.ac.uk, E-mail: r.new@shu.ac.uk, E-mail: aldos@mpa-garching.mpg.de

    2009-07-10T23:59:59.000Z

    We present new results on the structure of the solar core, obtained with new sets of frequencies of solar low-degree p modes obtained from the BiSON network. We find that different methods used in extracting the different sets of frequencies cause shifts in frequencies, but the shifts are not large enough to affect solar structure results. We find that the BiSON frequencies show that the solar sound speed in the core is slightly larger than that inferred from data from Michelson Doppler Imager low-degree modes, and the uncertainties on the inversion results are smaller. Density results also change by a larger amount, and we find that solar models now tend to show smaller differences in density compared to the Sun. The result is seen at all radii, a result of the fact that conservation of mass implies that density differences in one region have to cancel out density differences in others, since our models are constructed to have the same mass as the Sun. The uncertainties on the density results are much smaller too. We attribute the change in results to having more, and lower frequency, low-degree mode frequencies available. These modes provide greater sensitivity to conditions in the core.

  8. Amyloid Structure and Assembly: Insights from Scanning Transmission Electron Microscopy

    SciTech Connect (OSTI)

    Goldsbury, C.; Wall, J.; Baxa, U.; Simon, M. N.; Steven, A. C.; Engel, A.; Aebi, U.; Muller, S. A.

    2011-01-01T23:59:59.000Z

    Amyloid fibrils are filamentous protein aggregates implicated in several common diseases such as Alzheimer's disease and type II diabetes. Similar structures are also the molecular principle of the infectious spongiform encephalopathies such as Creutzfeldt-Jakob disease in humans, scrapie in sheep, and of the so-called yeast prions, inherited non-chromosomal elements found in yeast and fungi. Scanning transmission electron microscopy (STEM) is often used to delineate the assembly mechanism and structural properties of amyloid aggregates. In this review we consider specifically contributions and limitations of STEM for the investigation of amyloid assembly pathways, fibril polymorphisms and structural models of amyloid fibrils. This type of microscopy provides the only method to directly measure the mass-per-length (MPL) of individual filaments. Made on both in vitro assembled and ex vivo samples, STEM mass measurements have illuminated the hierarchical relationships between amyloid fibrils and revealed that polymorphic fibrils and various globular oligomers can assemble simultaneously from a single polypeptide. The MPLs also impose strong constraints on possible packing schemes, assisting in molecular model building when combined with high-resolution methods like solid-state nuclear magnetic resonance (NMR) and electron paramagnetic resonance (EPR).

  9. Radio Galaxies in Cooling Cores: Insights from a Complete Sample

    E-Print Network [OSTI]

    J. A. Eilek; F. N. Owen

    2006-12-04T23:59:59.000Z

    We have observed a new, complete, cooling-core sample with the VLA, in order to understand how the massive black hole in the central galaxy interacts with the local cluster plasma. We find that every cooling core is currently being energized by an active radio jet, which has probably been destabilized by its interaction with the cooling core. We argue that current models of cooling-core radio galaxies need to be improved before they can be used to determine the rate at which the jet is heating the cooling core. We also argue that the extended radio haloes we see in many cooling-core clusters need extended, in situ re-energization, which cannot be supplied solely by the central galaxy.

  10. Symbiosis insights through metagenomic analysis of a microbialconsortium

    SciTech Connect (OSTI)

    Woyke, Tanja; Teeling, Hanno; Ivanova, Natalia N.; Hunteman,Marcel; Richter, Michael; Gloeckner, Frank Oliver; Boffelli, Dario; Barry, Kerrie W.; Shapiro, Harris J.; Anderson, Iain J.; Szeto, Ernest; Kyrpides, Nikos C.; Mussmann, Marc; Amann, Rudolf; Bergin, Claudia; Ruehland, Caroline; Rubin, Edward M.; Dubilier, Nicole

    2006-09-01T23:59:59.000Z

    Symbioses between bacteria and eukaryotes are ubiquitous, yet our understanding of the interactions driving these associations is hampered by our inability to cultivate most host-associated microbes. Here, we used a metagenomic approach to describe four co-occurring symbionts from the marine oligochaete Olavius algarvensis, a worm lacking a mouth, gut, and nephridia. Shotgun sequencing and metabolic pathway reconstruction revealed that the symbionts are sulfur-oxidizing and sulfate-reducing bacteria, all of which are capable of carbon fixation, providing the host with multiple sources of nutrition. Molecular evidence for the uptake and recycling of worm waste products by the symbionts suggests how the worm could eliminate its excretory system, an adaptation unique among annelid worms. We propose a model which describes how the versatile metabolism within this symbiotic consortium provides the host with an optimal energy supply as it shuttles between the upper oxic and lower anoxic coastal sediments which it inhabits.

  11. Insight from Fukushima Daiichi Unit 3 Investigations using MELCOR

    SciTech Connect (OSTI)

    Robb, Kevin R. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Francis, Matthew W. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Ott, Larry J. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

    2014-01-01T23:59:59.000Z

    During the emergency response period of the accidents that took place at Fukushima Daiichi in March of 2011, researchers at Oak Ridge National Laboratory (ORNL) conducted a number of studies using the MELCOR code to help understand what was occurring and what had occurred. During the post-accident period, the Department of Energy (DOE) and the US Nuclear Regulatory Commission (NRC) jointly sponsored a study of the Fukushima Daiichi accident with collaboration among Oak Ridge, Sandia, and Idaho national laboratories. The purpose of the study was to compile relevant data, reconstruct the accident progression using computer codes, assess the codes predictive capabilities, and identify future data needs. The current paper summarizes some of the early MELCOR simulations and analyses conducted at ORNL of the Fukushima Daiichi Unit 3 accident. Extended analysis and discussion of the Unit 3 accident is also presented taking into account new knowledge and modeling refinements made since the joint DOE/NRC study.

  12. @scale: Insights from a Large, Long-Lived Appliance Stephen Dawson-Haggerty

    E-Print Network [OSTI]

    Culler, David E.

    Design, Measurement, Performance Keywords Energy, Audit, Building, Power, Wireless, Sensor Network 1@scale: Insights from a Large, Long-Lived Appliance Energy WSN Stephen Dawson-Haggerty , Steven Lanzisera , Jay Taneja , Richard Brown , and David Culler Computer Science Division Environmental Energy

  13. Isotopic fractionations associated with phosphoric acid digestion of carbonate minerals: Insights from first-principles theoretical

    E-Print Network [OSTI]

    Goddard III, William A.

    Isotopic fractionations associated with phosphoric acid digestion of carbonate minerals: Insights for oxygen- and carbon-isotope analysis of carbonate minerals since 1950, and was recently established of oxygen isotope acid digestion fractionations among different carbonate minerals. We suggest these results

  14. The central Kenya peralkaline province: Insights into the evolution of peralkaline salic magmas

    E-Print Network [OSTI]

    Boyer, Edmond

    The central Kenya peralkaline province: Insights into the evolution of peralkaline salic magmas Ra rue de la Férollerie, 45071 Orléans cedex 2, France Abstract The central Kenya peralkaline processes is summarized. Keywords: Kenya; Petrogenesis; Peralkaline magmas 1. Introduction In the central

  15. Welding: insights from high-temperature analogue experiments Steven L. Quane, J.K. Russell*

    E-Print Network [OSTI]

    Russell, Kelly

    Welding: insights from high-temperature analogue experiments Steven L. Quane, J.K. Russell* Igneous of pyroclastic deposits during welding is incompletely understood and is based on a surprisingly small number roles of emplacement temperature, load and glass transition temperature in welding of pyroclastic

  16. Thorium isotopes in the western Mediterranean Sea: an insight into the marine particle dynamics

    E-Print Network [OSTI]

    Coppola, Laurent

    Thorium isotopes in the western Mediterranean Sea: an insight into the marine particle dynamics M rights reserved. Keywords: thorium; isotopes; sea water; particles; sedimentation; Mediterranean Sea 1 physical, chemical and biological processes and sometimes non-steady-state condi- tions [1^4]. Thorium

  17. Is the Internet for Porn? An Insight Into the Online Adult Industry

    E-Print Network [OSTI]

    Kruegel, Christopher

    Is the Internet for Porn? An Insight Into the Online Adult Industry Gilbert Wondracek1 , Thorsten Introduction "The Internet is for Porn" is the title of a satirical song that has been viewed several million at work. With a total worth of more than 97 billion USD in 2006 [14], the Internet porn industry yields

  18. 13The Role of Insight in Perceptual Learning: Evidence from Illusory Contour Perception

    E-Print Network [OSTI]

    Rubin, Nava

    theoretical framework. In terms of brain mechanisms, this means that all types of learning may involve13The Role of Insight in Perceptual Learning: Evidence from Illusory Contour Perception Nava Rubin in performance is commonly made in behavioral studies of learning. The learning of perceptual and motor skills

  19. Formation of bands and ridges on Europa by cyclic deformation: Insights from analogue wax experiments

    E-Print Network [OSTI]

    Manga, Michael

    Formation of bands and ridges on Europa by cyclic deformation: Insights from analogue wax perform a set of analogue wax experiments aimed at understanding the processes and conditions that lead to lineament formation on Europa. We heat a layer of wax from below and cool it from above so that a solid

  20. Mechanistic Insights on the Hydrodesulfurization of Biphenyl-2-thiol with Nickel Compounds

    E-Print Network [OSTI]

    Jones, William D.

    Mechanistic Insights on the Hydrodesulfurization of Biphenyl-2-thiol with Nickel Compounds Jorge@servidor.unam.mx Abstract: The reactivity of the nickel(I) dimer [(dippe)Ni(µ-H)]2 (1) with biphenyl-2-thiol was explored evolves to the terminal nickel-hydride [(dippe)Ni (1 -C-2-biphenyl)(H)] (4) and transient [(dippe)NiS] (5

  1. LETTER Communicated by Christopher Williams Prototype Classification: Insights from Machine Learning

    E-Print Network [OSTI]

    LETTER Communicated by Christopher Williams Prototype Classification: Insights from Machine-of-class prototype classification using algorithms from machine learning that satisfy a set of invariance properties. We report a simple yet general approach to express different types of linear classification

  2. Oxygen diffusion in solid oxide fuel cell cathode and electrolyte materials: mechanistic insights from atomistic simulations

    E-Print Network [OSTI]

    Yildiz, Bilge

    to drive fast ionic transport. 1. Introduction The interest in Solid Oxide Fuel Cell (SOFC) technologyOxygen diffusion in solid oxide fuel cell cathode and electrolyte materials: mechanistic insights. Current targets of cost and durability necessitate solid oxide fuel cells to operate in the intermediate

  3. The Chaotic Nature of Human Experience: Insights on the Subject Matter of Design towards

    E-Print Network [OSTI]

    Mutlu, Bilge

    The Chaotic Nature of Human Experience: Insights on the Subject Matter of Design towards," as Design has no fixed subject matter but the entire scope of human experience. I argue that human" of the subject matter of design that is #12;iv "human experience." My thesis essay is an attempt to explore

  4. The Anatomy of a Memory: Insights Into How Information is Stored in the Brain

    E-Print Network [OSTI]

    Qian, Ning

    The Anatomy of a Memory: Insights Into How Information is Stored in the Brain Maria Concetta, to the ability of our brains to record and to store our experiences. Memory is the glue that binds our mental and biologists have joined forces to open up the "black box" to study how the brain and behavior allows us

  5. The Rock Varnish Revolution: New Insights from Microlaminations and the Contributions of Tanzhuo Liu

    E-Print Network [OSTI]

    Dorn, Ron

    in potential source materials. In the ensuing two centu- ries, investigations into rock varnish have beenThe Rock Varnish Revolution: New Insights from Microlaminations and the Contributions of Tanzhuo Liu Ronald I. Dorn* School of Geographical Sciences, Arizona State University Abstract Rock varnish

  6. Applicability of InSAR to tropical volcanoes: insights from Central AmericaQ1

    E-Print Network [OSTI]

    Biggs, Juliet

    volcanoes: insights from Central AmericaQ1 S. K. EBMEIER1*, J. BIGGS2,3, T. A. MATHER1 & F. AMELUNG3 1 COMET. 2009; Biggs et al. 2010), as well as a variety of shallower surface processes. These include previously thought to be quiescent (e.g. on the East African Rift: Biggs et al. 2009) and at locations

  7. The FASEB Journal Research Communication Structural insight into acute intermittent porphyria

    E-Print Network [OSTI]

    Zhijie, Liu

    Gaojie Song,* Yang Li,* Chongyun Cheng,* Yu Zhao,* Ang Gao,* Rongguang Zhang, Andrzej Joachimiak, Neil-regulation of PBGD activity in AIP.--Song, G., Li, Y., Cheng, C., Zhao, Y., Gao, A., Zhang, R., Joachimiak, A., Shaw, N., Liu, Z.-J. Structural insight into acute intermittent porphyria. FASEB J. 23, 396­404 (2009) Key

  8. Size effects in bimetallic nickelgold nanowires: Insight from atomic force microscopy nanoindentation

    E-Print Network [OSTI]

    Sansoz, Frederic

    Size effects in bimetallic nickel­gold nanowires: Insight from atomic force microscopy the local plastic behavior and hardness properties of electrodeposited bimetallic Ni­Au NWs ranging from 60 rights reserved. Keywords: Atomic force microscopy (AFM); Nanowire; Nickel; Gold; Nanoindentation 1

  9. New Insights into the Mechanisms of Water-Stress-Induced Cavitation in Conifers

    E-Print Network [OSTI]

    Mencuccini, Maurizio

    New Insights into the Mechanisms of Water-Stress-Induced Cavitation in Conifers Herve´ Cochard of Edinburgh, Edinburgh EH9 3JN, United Kingdom (M.M.) Cavitation resistance is a key parameter to understand at a pressure sufficient to aspirate pit tori and well above the pressure for cavitation induction we failed

  10. New insights into the chemical composition of chitinozoans Jrmy Jacob1,

    E-Print Network [OSTI]

    Boyer, Edmond

    1 New insights into the chemical composition of chitinozoans Jérémy Jacob1, , Florentin Paris2 dominated by aromatic groups with a low contribution of aliphatics and oxygen- or nitrogen-bearing compounds-GC/MS, chitin, Lower Palaeozoic Corresponding author: jeremy.jacob@univ-orleans.fr #12;2 1. Introduction

  11. Branching morphogenesis of the lung: new molecular insights into an old

    E-Print Network [OSTI]

    Chuang, Pao-Tien

    Branching morphogenesis of the lung: new molecular insights into an old problem Pao-Tien Chuang1 It has been known for decades that branching morpho- genesis of the lung is mediated through reciprocal between major signaling path- ways during branching morphogenesis of the lung in mice. It has been known

  12. Examination of 1D Solar Cell Model Limitations Using 3D SPICE Modeling: Preprint

    SciTech Connect (OSTI)

    McMahon, W. E.; Olson, J. M.; Geisz, J. F.; Friedman, D. J.

    2012-06-01T23:59:59.000Z

    To examine the limitations of one-dimensional (1D) solar cell modeling, 3D SPICE-based modeling is used to examine in detail the validity of the 1D assumptions as a function of sheet resistance for a model cell. The internal voltages and current densities produced by this modeling give additional insight into the differences between the 1D and 3D models.

  13. Modeling diffusion of electrical appliances in the residential sector

    E-Print Network [OSTI]

    McNeil, Michael A.

    2010-01-01T23:59:59.000Z

    baseline energy consumption and efficiency trends for eachenergy consumption take a top-down approach, correlating consumption growth to macroeconomic trends.Energy Consumption Survey (RECS) for 2001 (USDOE 2001). The data show a clear trend,

  14. Temporal and spatial scaling of hydraulic response to recharge in fractured aquifers: Insights from a frequency domain analysis

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Temporal and spatial scaling of hydraulic response to recharge in fractured aquifers: Insights from investigate the hydraulic response to recharge of a fractured aquifer, using a frequency domain approach scaling of hydraulic response to recharge in fractured aquifers: Insights from a frequency domain analysis

  15. Climate Insights 101 Questions and Discussion Points Module 1, Lesson 1: CO2 and the Greenhouse Effect

    E-Print Network [OSTI]

    Pedersen, Tom

    Effect 1 Climate Insights 101 Questions and Discussion Points Module 1, Lesson 1: CO2 and the Greenhouse Effect Available at http://pics.uvic.ca/education/climate-insights-101 1. CO2 and the Greenhouse Effect Questions: How did the term "greenhouse effect" originate? Why did it stick in the public imagination? Why

  16. Structural and biochemical insights into 2?-O-methylation at the 3?-terminal nucleotide of RNA by Hen1

    SciTech Connect (OSTI)

    Chan, Chio Mui; Zhou, Chun; Brunzelle, Joseph S.; Huang, Raven H.; (UIUC); (NWU)

    2010-01-28T23:59:59.000Z

    Small RNAs of {approx}20-30 nt have diverse and important biological roles in eukaryotic organisms. After being generated by Dicer or Piwi proteins, all small RNAs in plants and a subset of small RNAs in animals are further modified at their 3'-terminal nucleotides via 2'-O-methylation, carried out by the S-adenosylmethionine-dependent methyltransferase (MTase) Hen1. Methylation at the 3' terminus is vital for biological functions of these small RNAs. Here, we report four crystal structures of the MTase domain of a bacterial homolog of Hen1 from Clostridium thermocellum and Anabaena variabilis, which are enzymatically indistinguishable from the eukaryotic Hen1 in their ability to methylate small single-stranded RNAs. The structures reveal that, in addition to the core fold of the MTase domain shared by other RNA and DNA MTases, the MTase domain of Hen1 possesses a motif and a domain that are highly conserved and are unique to Hen1. The unique motif and domain are likely to be involved in RNA substrate recognition and catalysis. The structures allowed us to construct a docking model of an RNA substrate bound to the MTase domain of bacterial Hen1, which is likely similar to that of the eukaryotic counterpart. The model, supported by mutational studies, provides insight into RNA substrate specificity and catalytic mechanism of Hen1.

  17. New insights into Arctic paleogeography and tectonics from U-Pb detrital zircon geochronology

    E-Print Network [OSTI]

    Amato, Jeff

    of these rifting models, the ``rotational opening model'', often referred to as the ``windshield wiper'' model

  18. Game theoretic models of inter-firm R&D dynamics in semiconductor manufacturing

    E-Print Network [OSTI]

    Heaps-Nelson, G. Thomas

    2013-01-01T23:59:59.000Z

    This dissertation demonstrates that valuable strategic insight and a reasonable measure of predictive power can be obtained by developing and analyzing context-rich parsimonious game theoretic strategy models during large ...

  19. Bayesian Gaussian Graphical models using sparse selection priors and their mixtures

    E-Print Network [OSTI]

    Talluri, Rajesh

    2012-10-19T23:59:59.000Z

    and identification of related networks and samples. Such models may improve the accuracy of biological sample classification based on patterns of protein network activation, and provide insight into the distinct biological relationships underlying different cancers...

  20. Structural and Mechanistic Insights into C-P Bond Hydrolysis by Phosphonoacetate Hydrolase

    SciTech Connect (OSTI)

    Agarwal, Vinayak; Borisova, Svetlana A.; Metcalf, William W.; van der Donk, Wilfred A.; Nair, Satish K. (UIUC)

    2011-12-22T23:59:59.000Z

    Bacteria have evolved pathways to metabolize phosphonates as a nutrient source for phosphorus. In Sinorhizobium meliloti 1021, 2-aminoethylphosphonate is catabolized to phosphonoacetate, which is converted to acetate and inorganic phosphate by phosphonoacetate hydrolase (PhnA). Here we present detailed biochemical and structural characterization of PhnA that provides insights into the mechanism of C-P bond cleavage. The 1.35 {angstrom} resolution crystal structure reveals a catalytic core similar to those of alkaline phosphatases and nucleotide pyrophosphatases but with notable differences, such as a longer metal-metal distance. Detailed structure-guided analysis of active site residues and four additional cocrystal structures with phosphonoacetate substrate, acetate, phosphonoformate inhibitor, and a covalently bound transition state mimic provide insight into active site features that may facilitate cleavage of the C-P bond. These studies expand upon the array of reactions that can be catalyzed by enzymes of the alkaline phosphatase superfamily.

  1. Viscoelastic Model for Lung Parenchyma for Multi-Scale Modeling of Respiratory System, Phase II: Dodecahedral Micro-Model

    SciTech Connect (OSTI)

    Freed, Alan D.; Einstein, Daniel R.; Carson, James P.; Jacob, Rick E.

    2012-03-01T23:59:59.000Z

    In the first year of this contractual effort a hypo-elastic constitutive model was developed and shown to have great potential in modeling the elastic response of parenchyma. This model resides at the macroscopic level of the continuum. In this, the second year of our support, an isotropic dodecahedron is employed as an alveolar model. This is a microscopic model for parenchyma. A hopeful outcome is that the linkage between these two scales of modeling will be a source of insight and inspiration that will aid us in the final year's activity: creating a viscoelastic model for parenchyma.

  2. Wing Shape of Four New Bee Fossils (Hymenoptera: Anthophila) Provides Insights to Bee Evolution

    E-Print Network [OSTI]

    Dehon, Manuel; Michez, Denis; Nel, André Engel, Michael S.; De Meulemeester, Thibaut

    2014-10-29T23:59:59.000Z

    insights into more recent phenomena among bee evolution, such as changing patterns of biogeography and responses to Paleogene and Neogene geological events. Four of the most important deposits with bee fossils are the Eckfeld/Messel oil shales of Germany... compressions in oil shale. The flora found in this section of the basin suggests a tropical to subtropical climate with a distinct dry season [37], and occurred at a paleoelevation of ,1500–2900 m [38]. The Oligocene lacustrine beds (‘calcaire de Campagne...

  3. Managing aging in nuclear power plants: Insights from NRC maintenance team inspection reports

    SciTech Connect (OSTI)

    Fresco, A.; Subudhi, M.; Gunther, W.; Grove, E.; Taylor, J. [Brookhaven National Lab., Upton, NY (United States)

    1993-12-01T23:59:59.000Z

    A plant`s maintenance program is the principal vehicle through which age-related degradation is managed. From 1988 to 1991, the NRC evaluated the maintenance program of every nuclear power plant in the United States. Forty-four out of a total of 67 of the reports issued on these in-depth team inspections were reviewed for insights into the strengths and weaknesses of the programs as related to the need to understand and manage the effects of aging on nuclear plant systems, structures, and components. Relevant information was extracted from these inspection reports and sorted into several categories, including Specific Aging Insights, Preventive Maintenance, Predictive Maintenance and Condition Monitoring, Post Maintenance Testing, Failure Trending, Root Cause Analysis and Usage of Probabilistic Risk Assessment in the Maintenance Process. Specific examples of inspection and monitoring techniques successfully used by utilities to detect degradation due to aging have been identified. The information also was sorted according to systems and components, including: Auxiliary Feedwater, Main Feedwater, High Pressure Injection for both BWRs and PWRs, Service Water, Instrument Air, and Emergency Diesel Generator Air Start Systems, and Emergency Diesel Generators Air Start Systems, emergency diesel generators, electrical components such as switchgear, breakers, relays, and motor control centers, motor operated valves and check valves. This information was compared to insights gained from the Nuclear Plant Aging Research (NPAR) Program. Attributes of plant maintenance programs where the NRC inspectors felt that improvement was needed to properly address the aging issue also are discussed.

  4. Controlled manipulation of elastomers with radiation: Insights from multiquantum nuclear-magnetic-resonance data and mechanical measurements

    SciTech Connect (OSTI)

    Maiti, A.; Weisgraber, T.; Dinh, L. N.; Gee, R. H.; Wilson, T.; Chinn, S.; Maxwell, R. S. [Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

    2011-03-15T23:59:59.000Z

    Filled and cross-linked elastomeric rubbers are versatile network materials with a multitude of applications ranging from artificial organs and biomedical devices to cushions, coatings, adhesives, interconnects, and seismic-isolation, thermal, and electrical barriers. External factors such as mechanical stress, temperature fluctuations, or radiation are known to create chemical changes in such materials that can directly affect the molecular weight distribution (MWD) of the polymer between cross-links and alter the structural and mechanical properties. From a materials science point of view it is highly desirable to understand, affect, and manipulate such property changes in a controlled manner. Unfortunately, that has not yet been possible due to the lack of experimental characterization of such networks under controlled environments. In this work we expose a known rubber material to controlled dosages of {gamma} radiation and utilize a newly developed multiquantum nuclear-magnetic-resonance technique to characterize the MWD as a function of radiation. We show that such data along with mechanical stress-strain measurements are amenable to accurate analysis by simple network models and yield important insights into radiation-induced molecular-level processes.

  5. Insights from Smart Meters: The Potential for Peak-Hour Savings from Behavior-Based Programs

    SciTech Connect (OSTI)

    Todd, Annika; Perry, Michael; Smith, Brian; Sullivan, Michael; Cappers, Peter; Goldman, Charles

    2014-03-25T23:59:59.000Z

    The rollout of smart meters in the last several years has opened up new forms of previously unavailable energy data. Many utilities are now able in real-time to capture granular, household level interval usage data at very high-frequency levels for a large proportion of their residential and small commercial customer population. This can be linked to other time and locationspecific information, providing vast, constantly growing streams of rich data (sometimes referred to by the recently popular buzz word, “big data”). Within the energy industry there is increasing interest in tapping into the opportunities that these data can provide. What can we do with all of these data? The richness and granularity of these data enable many types of creative and cutting-edge analytics. Technically sophisticated and rigorous statistical techniques can be used to pull interesting insights out of this highfrequency, human-focused data. We at LBNL are calling this “behavior analytics”. This kind of analytics has the potential to provide tremendous value to a wide range of energy programs. For example, highly disaggregated and heterogeneous information about actual energy use would allow energy efficiency (EE) and/or demand response (DR) program implementers to target specific programs to specific households; would enable evaluation, measurement and verification (EM&V) of energy efficiency programs to be performed on a much shorter time horizon than was previously possible; and would provide better insights in to the energy and peak hour savings associated with specifics types of EE and DR programs (e.g., behavior-based (BB) programs). In this series, “Insights from Smart Meters”, we will present concrete, illustrative examples of the type of value that insights from behavior analytics of these data can provide (as well as pointing out its limitations). We will supply several types of key findings, including: • Novel results, which answer questions the industry previously was unable to answer; • Proof-of-concept analytics tools that can be adapted and used by others; and • Guidelines and protocols that summarize analytical best practices. This report focuses on one example of the kind of value that analysis of this data can provide: insights into whether behavior-based (BB) efficiency programs have the potential to provide peak-hour energy savings.

  6. Insights on Curriculum, Instruction, and Early Literacy Learning: Student Characteristic by Instruction Interaction Effects on Literacy Outcomes

    E-Print Network [OSTI]

    Rose, Michael R.

    in focusing students' attention on learning activities within grade, from grade Insights on Curriculum, Instruction, and Early Literacy Learning: Student focused on children's learning in the classroom ­ from preschool through third

  7. CIMS: An Integrated US-Canadian Model

    E-Print Network [OSTI]

    Nyboer, J.

    2006-01-01T23:59:59.000Z

    CIMS: An Integrated US-Canadian Model John Nyboer, Simon Fraser University As the US addresses energy supply security and, at a state level, various environmental objectives, it is not clear what effect these will have on Canada's exports... technologies in both countries, one can obtain insight into economic and policy consequences for Canada of various US energy scenarios. ...

  8. Density Functional Theory Models for Radiation Damage

    E-Print Network [OSTI]

    Density Functional Theory Models for Radiation Damage S.L. Dudarev EURATOM/CCFE Fusion Association and informative as the most advanced experimental techniques developed for the observation of radiation damage investigation and assessment of radiation damage effects, offering new insight into the origin of temperature

  9. Insights into a researcher's attempt to study the mentoring needs of first-year, white, female teachers in diverse schools

    E-Print Network [OSTI]

    Attaway, Kathy Ann

    2008-10-10T23:59:59.000Z

    INSIGHTS INTO A RESEARCHER’S ATTEMPT TO STUDY THE MENTORING NEEDS OF FIRST-YEAR, WHITE, FEMALE TEACHERS IN DIVERSE SCHOOLS A Dissertation by KATHY ANN ATTAWAY Submitted to the Office of Graduate Studies of Texas A&M University... in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY December 2007 Major Subject: Educational Administration INSIGHTS INTO A RESEARCHER’S ATTEMPT TO STUDY THE MENTORING NEEDS OF FIRST-YEAR, WHITE, FEMALE...

  10. Computationally Efficient Cardiac Bioelectricity Models Toward Whole-Heart Simulation

    E-Print Network [OSTI]

    Branicky, Michael S.

    Computationally Efficient Cardiac Bioelectricity Models Toward Whole-Heart Simulation Nathan A of developing new insights and techniques in simulating the electrical behavior of the human heart. While very A computationally feasible whole-heart model could be invaluable in the study of human heart pathology

  11. New Whole-House Solutions Case Study: Insight Homes, Seaford, Delaware

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in Many DevilsForumEngines |New Technology forDepartmentDevotedtheInsight

  12. Closer to HIV vaccine goal with new insight into viral factors

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t zManufacturing:DOE National LaboratoryLabNew insight

  13. Integrated Assessment Modeling

    SciTech Connect (OSTI)

    Edmonds, James A.; Calvin, Katherine V.; Clarke, Leon E.; Janetos, Anthony C.; Kim, Son H.; Wise, Marshall A.; McJeon, Haewon C.

    2012-10-31T23:59:59.000Z

    This paper discusses the role of Integrated Assessment models (IAMs) in climate change research. IAMs are an interdisciplinary research platform, which constitutes a consistent scientific framework in which the large-scale interactions between human and natural Earth systems can be examined. In so doing, IAMs provide insights that would otherwise be unavailable from traditional single-discipline research. By providing a broader view of the issue, IAMs constitute an important tool for decision support. IAMs are also a home of human Earth system research and provide natural Earth system scientists information about the nature of human intervention in global biogeophysical and geochemical processes.

  14. A Computational Model of Limb Impedance Control Based on Principles of Internal Model Uncertainty

    E-Print Network [OSTI]

    Vijayakumar, Sethu

    of Informatics, University of Edinburgh, Edinburgh, United Kingdom, 2 ATR Computational Neuroscience Laboratories uncertainties, along with energy and accuracy demands. The insights from this computational model could be used. This is an effortless task, however if suddenly a seemingly random wind gust perturbs the umbrella, you will typically

  15. Development of Sulfur and Carbon Tolerant Reforming Alloy Catalysts Aided Fundamental Atomistic Insights

    SciTech Connect (OSTI)

    Suljo Linic

    2008-12-31T23:59:59.000Z

    Current hydrocarbon reforming catalysts suffer from rapid carbon and sulfur poisoning. Even though there is a tremendous incentive to develop more efficient catalysts, these materials are currently formulated using inefficient trial and error experimental approaches. We have utilized a hybrid experimental/theoretical approach, combining quantum Density Functional Theory (DFT) calculations and various state-of-the-art experimental tools, to formulate carbon tolerant reforming catalysts. We have employed DFT calculations to develop molecular insights into the elementary chemical transformations that lead to carbon poisoning of Ni catalysts. Based on the obtained molecular insights, we have identified, using DFT quantum calculation, various Ni alloy catalysts as potential carbon tolerant reforming catalysts. The alloy catalysts were synthesized and tested in steam reforming and partial oxidation of methane, propane, and isooctane. We demonstrated that the alloy catalysts are much more carbon-tolerant than monometallic Ni catalysts under nearly stoichiometric steam-to-carbon ratios. Under these conditions, monometallic Ni is rapidly poisoned by sp2 carbon deposits. The research approach is distinguished by two characteristics: (a) knowledge-based, bottomup approach, compared to the traditional trial and error approach, allows for a more efficient and systematic discovery of improved catalysts. (b) the focus is on exploring alloy materials which have been largely unexplored as potential reforming catalysts.

  16. Heat transfer and oil displacement models for tar sands reservoirs

    SciTech Connect (OSTI)

    Ward, C.E.; Ward, G.D.

    1984-09-01T23:59:59.000Z

    A convective heat transfer model and one dimensional displacement model applicable to tar sands and heavy oils for use with a microcomputer are presented. The convective heat transfer model describes the temperature profiles in a thermal operation. The displacement model offers insight into the effect of process variables on the steam/oil or air/oil ratio of thermal operations. A method is presented for predicting the fuel burn in a fireflood.

  17. Crystal Structure of UBA2[superscript ufd]-Ubc9: Insights into E1-E2 Interactions in Sumo Pathways

    SciTech Connect (OSTI)

    Wang, Jing; Taherbhoy, Asad M.; Hunt, Harold W.; Seyedin, Steven N.; Miller, David W.; Miller, Darcie J.; Huang, Danny T.; Schulman, Brenda A. (SJCH)

    2012-04-30T23:59:59.000Z

    Canonical ubiquitin-like proteins (UBLs) such as ubiquitin, Sumo, NEDD8, and ISG15 are ligated to targets by E1-E2-E3 multienzyme cascades. The Sumo cascade, conserved among all eukaryotes, regulates numerous biological processes including protein localization, transcription, DNA replication, and mitosis. Sumo conjugation is initiated by the heterodimeric Aos1-Uba2 E1 enzyme (in humans called Sae1-Uba2), which activates Sumo's C-terminus, binds the dedicated E2 enzyme Ubc9, and promotes Sumo C-terminal transfer between the Uba2 and Ubc9 catalytic cysteines. To gain insights into details of E1-E2 interactions in the Sumo pathway, we determined crystal structures of the C-terminal ubiquitin fold domain (ufd) from yeast Uba2 (Uba2{sup ufd}), alone and in complex with Ubc9. The overall structures of both yeast Uba2{sup ufd} and Ubc9 superimpose well on their individual human counterparts, suggesting conservation of fundamental features of Sumo conjugation. Docking the Uba2{sup ufd}-Ubc9 and prior full-length human Uba2 structures allows generation of models for steps in Sumo transfer from Uba2 to Ubc9, and supports the notion that Uba2 undergoes remarkable conformational changes during the reaction. Comparisons to previous structures from the NEDD8 cascade demonstrate that UBL cascades generally utilize some parallel E1-E2 interaction surfaces. In addition, the structure of the Uba2{sup ufd}-Ubc9 complex reveals interactions unique to Sumo E1 and E2. Comparison with a previous Ubc9-E3 complex structure demonstrates overlap between Uba2 and E3 binding sites on Ubc9, indicating that loading with Sumo and E3-catalyzed transfer to substrates are strictly separate steps. The results suggest mechanisms establishing specificity and order in Sumo conjugation cascades.

  18. Revisiting Insights from Three Mile Island Unit 2 Postaccident Examinations and Evaluations in View of the Fukushima Daiichi Accident

    SciTech Connect (OSTI)

    Joy Rempe; Mitchell Farmer; Michael Corradini; Larry Ott; Randall Gauntt; Dana Powers

    2012-11-01T23:59:59.000Z

    The Three Mile Island Unit 2 (TMI-2) accident, which occurred on March 28, 1979, led industry and regulators to enhance strategies to protect against severe accidents in commercial nuclear power plants. Investigations in the years after the accident concluded that at least 45% of the core had melted and that nearly 19 tonnes of the core material had relocated to the lower head. Postaccident examinations indicate that about half of that material formed a solid layer near the lower head and above it was a layer of fragmented rubble. As discussed in this paper, numerous insights related to pressurized water reactor accident progression were gained from postaccident evaluations of debris, reactor pressure vessel (RPV) specimens, and nozzles taken from the RPV. In addition, information gleaned from TMI-2 specimen evaluations and available data from plant instrumentation were used to improve severe accident simulation models that form the technical basis for reactor safety evaluations. Finally, the TMI-2 accident led the nuclear community to dedicate considerable effort toward understanding severe accident phenomenology as well as the potential for containment failure. Because available data suggest that significant amounts of fuel heated to temperatures near melting, the events at Fukushima Daiichi Units 1, 2, and 3 offer an unexpected opportunity to gain similar understanding about boiling water reactor accident progression. To increase the international benefit from such an endeavor, we recommend that an international effort be initiated to (a) prioritize data needs; (b) identify techniques, samples, and sample evaluations needed to address each information need; and (c) help finance acquisition of the required data and conduct of the analyses.

  19. Domain wall motion and electromechanical strain in lead-free piezoelectrics: Insight from the model system (1 ? x)Ba(Zr{sub 0.2}Ti{sub 0.8})O{sub 3}–x(Ba{sub 0.7}Ca{sub 0.3})TiO{sub 3} using in situ high-energy X-ray diffraction during application of electric fields

    SciTech Connect (OSTI)

    Tutuncu, Goknur [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 (United States); Li, Binzhi [Department of Chemical Engineering and Materials Science, University of California, Davis, Davis, California 95616 (United States); Bowman, Keith [Illinois Institute of Technology, Armour College of Engineering, Chicago, Illinois 60616 (United States); School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907 (United States); Jones, Jacob L., E-mail: JacobJones@ncsu.edu [Department of Materials Science and Engineering, North Carolina State University, Raleigh, North Carolina 27695 (United States)

    2014-04-14T23:59:59.000Z

    The piezoelectric compositions (1 ? x)Ba(Zr{sub 0.2}Ti{sub 0.8})O{sub 3}–x(Ba{sub 0.7}Ca{sub 0.3})TiO{sub 3} (BZT-xBCT) span a model lead-free morphotropic phase boundary (MPB) between room temperature rhombohedral and tetragonal phases at approximately x?=?0.5. In the present work, in situ X-ray diffraction measurements during electric field application are used to elucidate the origin of electromechanical strain in several compositions spanning the tetragonal compositional range 0.6???x???0.9. As BCT concentration decreases towards the MPB, the tetragonal distortion (given by c/a-1) decreases concomitantly with an increase in 90° domain wall motion. The increase in observed macroscopic strain is predominantly attributed to the increased contribution from 90° domain wall motion. The results demonstrate that domain wall motion is a significant factor in achieving high strain and piezoelectric coefficients in lead-free polycrystalline piezoelectrics.

  20. INSIGHTS INTO PRE-ENRICHMENT OF STAR CLUSTERS AND SELF-ENRICHMENT OF DWARF GALAXIES FROM THEIR INTRINSIC METALLICITY DISPERSIONS

    SciTech Connect (OSTI)

    Leaman, Ryan, E-mail: rleaman@uvic.ca [Department of Physics and Astronomy, University of Victoria, Victoria, BC V8P 1A1 (Canada)

    2012-12-01T23:59:59.000Z

    Star clusters are known to have smaller intrinsic metallicity spreads than dwarf galaxies due to their shorter star formation timescales. Here we use individual spectroscopic [Fe/H] measurements of stars in 19 Local Group dwarf galaxies, 13 Galactic open clusters, and 49 globular clusters to show that star cluster and dwarf galaxy linear metallicity distributions are binomial in form, with all objects showing strong correlations between their mean linear metallicity Z-bar and intrinsic spread in metallicity {sigma}(Z){sup 2}. A plot of {sigma}(Z){sup 2} versus Z-bar shows that the correlated relationships are offset for the dwarf galaxies from the star clusters. The common binomial nature of these linear metallicity distributions can be explained with a simple inhomogeneous chemical evolution model, where the star cluster and dwarf galaxy behavior in the {sigma}(Z){sup 2}- Z-bar diagram is reproduced in terms of the number of enrichment events, covering fraction, and intrinsic size of the enriched regions. The inhomogeneity of the self-enrichment sets the slope for the observed dwarf galaxy {sigma}(Z){sup 2}- Z-bar correlation. The offset of the star cluster sequence from that of the dwarf galaxies is due to pre-enrichment, and the slope of the star cluster sequence represents the remnant signature of the self-enriched history of their host galaxies. The offset can be used to separate star clusters from dwarf galaxies without a priori knowledge of their luminosity or dynamical mass. The application of the inhomogeneous model to the {sigma}(Z){sup 2}- Z-bar relationship provides a numerical formalism to connect the self-enrichment and pre-enrichment between star clusters and dwarf galaxies using physically motivated chemical enrichment parameters. Therefore we suggest that the {sigma}(Z){sup 2}- Z-bar relationship can provide insight into what drives the efficiency of star formation and chemical evolution in galaxies, and is an important prediction for galaxy simulation models to reproduce.

  1. Comments on the use of computer models for merger analysis in the electricity industry

    E-Print Network [OSTI]

    California at Berkeley. University of

    that the commission is considering, electricity market models, production cost/optimal power flow models, and hybridsComments on the use of computer models for merger analysis in the electricity industry FERC Docket for market power in electricity markets. These analyses have yielded several insights about the application

  2. Chemical kinetics and combustion modeling

    SciTech Connect (OSTI)

    Miller, J.A. [Sandia National Laboratories, Livermore, CA (United States)

    1993-12-01T23:59:59.000Z

    The goal of this program is to gain qualitative insight into how pollutants are formed in combustion systems and to develop quantitative mathematical models to predict their formation rates. The approach is an integrated one, combining low-pressure flame experiments, chemical kinetics modeling, theory, and kinetics experiments to gain as clear a picture as possible of the process in question. These efforts are focused on problems involved with the nitrogen chemistry of combustion systems and on the formation of soot and PAH in flames.

  3. Mobilizing Public Markets to Finance Renewable Energy Projects: Insights from Expert Stakeholders

    SciTech Connect (OSTI)

    Schwabe, P.; Mendelsohn, M.; Mormann, F.; Arent, D. J.

    2012-06-01T23:59:59.000Z

    Financing renewable energy projects in the United States can be a complex process. Most equity investment in new renewable power production facilities is supported by tax credits and accelerated depreciation benefits, and is constrained by the pool of potential investors that can fully use these tax benefits and are willing to engage in complex financial structures. For debt financing, non-government lending has largely been provided by foreign banks that may be under future lending constraints due to economic and regulatory conditions. To discuss renewable energy financing challenges and to identify new sources of capital to the U.S. market, two roundtable discussions were held with renewable energy and financing experts in April 2012. This report summarizes the key messages of those discussions and is designed to provide insights to the U.S. market and inform the international conversation on renewable energy financing innovations.

  4. Core damage frequency observations and insights of LWRs based on the IPEs

    SciTech Connect (OSTI)

    Dingman, S.E.; Camp, A.L. [Sandia National Labs., Albuquerque, NM (United States); Drouin, M.T.; Kolaczkowski, A.; Darby, J.; LaChance, J.L.; Yakle, J.

    1995-01-01T23:59:59.000Z

    Seventy-eight plants are expected to submit Individual Plant Examinations (IPEs) for severe accident vulnerabilities to the U.S. Nuclear Regulatory Commission (NRC). The majority of the plants have elected to perform full Level 1 probabilistic risk assessments (PRAs) to meet the intent of the IPES. Because of this, it is possible to compare the results from the IPE submittals to determine general observations and {open_quotes}lessons learned{close_quotes} from the IPES. The IPE Insights Program is performing this evaluation, and preliminary results are presented in this paper. The core damage frequency and core damage sequences are identified and compared for pressurized water reactors and boiling water reactors. Examination of the results indicates that variations among plant results are due to a combination of actual plant design/operational features and analysis approaches. The findings are consistent with previous NRC studies, such as WASH-1400 and NUREG-1 150.

  5. Core damage frequency observations and insights of LWRs based on the IPEs

    SciTech Connect (OSTI)

    Dingman, S.E.; Camp, A.L. [Sandia National Labs., Albuquerque, NM (United States); Drouin, M.T. [and others

    1995-04-01T23:59:59.000Z

    Seventy-eight plants are expected to submit Individual Plant Examinations (IPEs) for severe accident vulnerabilities to the US Nuclear Regulatory Commission (NRC). The majority of the plants have elected to perform full Level 1 probabilistic risk assessments (PRAs) to meet the intent of the IPEs. Because of this, it is possible to compare the results from the IPE submittals to determine general observations and {open_quotes}lessons learned{close_quotes} from the IPEs. The IPE Insights Program is performing this evaluation, and preliminary results are presented in this paper. The core damage frequency and core damage sequences are identified and compared for pressurized water reactors and boiling water reactors. Examination of the results indicates that variations among plant results are due to a combination of actual plant design/operational features and analysis approaches. The findings are consistent with previous NRC studies, such as WASH-1400 and NUREG-1150.

  6. 2010 Honda Insight VIN 1748 Hybrid Electric Vehicle Battery Test Results

    SciTech Connect (OSTI)

    Tyler Gray; Matthew Shirk

    2013-01-01T23:59:59.000Z

    The U.S. Department of Energy Advanced Vehicle Testing Activity Program consists of vehicle, battery, and infrastructure testing on advanced technology related to transportation. The activity includes tests on hybrid electric vehicles (HEVs), including testing the HEV batteries when both the vehicles and batteries are new and at the conclusion of 160,000 miles of on road fleet testing. This report documents battery testing performed for the 2010 Honda Insight HEV (VIN: JHMZE2H59AS011748). Battery testing was performed by the Electric Transportation Engineering Corporation dba ECOtality North America. The Idaho National Laboratory and ECOtality North America collaborate on the Advanced Vehicle Testing Activity for the Vehicle Technologies Program of the U.S. Department of Energy.

  7. 2010 Honda Insight VIN 0141 Hybrid Electric Vehicle Battery Test Results

    SciTech Connect (OSTI)

    Tyler Gray

    2013-01-01T23:59:59.000Z

    The U.S. Department of Energy Advanced Vehicle Testing Activity Program consists of vehicle, battery, and infrastructure testing on advanced technology related to transportation. The activity includes tests on hybrid electric vehicles (HEVs), including testing the HEV batteries when both the vehicles and batteries are new and at the conclusion of 160,000 miles of on road fleet testing. This report documents battery testing performed for the 2010 Honda Insight HEV (VIN: JHMZE2H78AS010141). Battery testing was performed by the Electric Transportation Engineering Corporation dba ECOtality North America. The Idaho National Laboratory and ECOtality North America collaborate on the Advanced Vehicle Testing Activity for the Vehicle Technologies Program of the U.S. Department of Energy.

  8. Development of Integrated Motor Assist Hybrid System: Development of the 'Insight', a Personal Hybrid Coupe

    SciTech Connect (OSTI)

    Kaoru Aoki; Shigetaka Kuroda; Shigemasa Kajiwara; Hiromitsu Sato; Yoshio Yamamoto

    2000-06-19T23:59:59.000Z

    This paper presents the technical approach used to design and develop the powerplant for the Honda Insight, a new motor assist hybrid vehicle with an overall development objective of just half the fuel consumption of the current Civic over a wide range of driving conditions. Fuel consumption of 35km/L (Japanese 10-15 mode), and 3.4L/100km (98/69/EC) was realized. To achieve this, a new Integrated Motor Assist (IMA) hybrid power plant system was developed, incorporating many new technologies for packaging and integrating the motor assist system and for improving engine thermal efficiency. This was developed in combination with a new lightweight aluminum body with low aerodynamic resistance. Environmental performance goals also included the simultaneous achievement of low emissions (half the Japanese year 2000 standards, and half the EU2000 standards), high efficiency, and recyclability. Full consideration was also given to key consumer attributes, including crash safety performance, handling, and driving performance.

  9. Application of molecular simulations: Insight into liquid bridging and jetting phenomena

    E-Print Network [OSTI]

    I. Nezbeda; J. Jirsák; F. Mou?ka; W. R. Smith

    2015-04-03T23:59:59.000Z

    Molecular dynamics simulations have been performed on pure liquid water, aqueous solutions of sodium chloride, and polymer solutions exposed to a strong external electric field with the goal to gain molecular insight into the structural response to the field. Several simulation methodologies have been used to elucidate the molecular mechanisms of the processes leading to the formation of liquid bridges and jets (in the production of nanofibers). It is shown that in the established nanoscale structures, the molecules form a chain with their dipole moments oriented parallel to the applied field throughout the entire sample volume. The presence of ions may disturb this structure leading to its ultimate disintegration into droplets; the concentration dependence of the threshold field required to stabilize a liquid column has been determined. Conformational changes of the polymer in the jetting process have also been observed.

  10. Crystal Structures of Human and Staphylococcus aureus Pyruvate Carboxylase and Molecular Insights into the Carboxyltransfer Reaction

    SciTech Connect (OSTI)

    Xiang,S.; Tong, L.

    2008-01-01T23:59:59.000Z

    Pyruvate carboxylase (PC) catalyzes the biotin-dependent production of oxaloacetate and has important roles in gluconeogenesis, lipogenesis, insulin secretion and other cellular processes. PC contains the biotin carboxylase (BC), carboxyltransferase (CT) and biotin-carboxyl carrier protein (BCCP) domains. We report here the crystal structures at 2.8-Angstroms resolution of full-length PC from Staphylococcus aureus and the C-terminal region (missing only the BC domain) of human PC. A conserved tetrameric association is observed for both enzymes, and our structural and mutagenesis studies reveal a previously uncharacterized domain, the PC tetramerization (PT) domain, which is important for oligomerization. A BCCP domain is located in the active site of the CT domain, providing the first molecular insights into how biotin participates in the carboxyltransfer reaction. There are dramatic differences in domain positions in the monomer and the organization of the tetramer between these enzymes and the PC from Rhizobium etli.

  11. Global Workspace Theory, its LIDA Model and the Underlying Neuroscience Stan Franklin, Steve Strain, Javier Snaider, Ryan McCall, Usef Faghihi

    E-Print Network [OSTI]

    Memphis, University of

    from animal (including human) cognition. Such architectures should faithfully model its insights from what is known from animal (including human) cognition be tested against empirical studies of humans and other animals. Such studies

  12. Serpentinization reaction pathways: implications for modeling approach

    SciTech Connect (OSTI)

    Janecky, D.R.

    1986-01-01T23:59:59.000Z

    Experimental seawater-peridotite reaction pathways to form serpentinites at 300/sup 0/C, 500 bars, can be accurately modeled using the EQ3/6 codes in conjunction with thermodynamic and kinetic data from the literature and unpublished compilations. These models provide both confirmation of experimental interpretations and more detailed insight into hydrothermal reaction processes within the oceanic crust. The accuracy of these models depends on careful evaluation of the aqueous speciation model, use of mineral compositions that closely reproduce compositions in the experiments, and definition of realistic reactive components in terms of composition, thermodynamic data, and reaction rates.

  13. A case for variational geomagnetic data assimilation: insights from a one-dimensional, nonlinear, and sparsely observed

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    variations of the geomagnetic field have been measured with a continuously im- proving accuracy duringA case for variational geomagnetic data assimilation: insights from a one-dimensional, nonlinear-mentioned coupled system ­ some version being currently under construction ­ the question is debated in this paper

  14. Mineralogical and chemical characterization of lunar highland soils: Insights into the space weathering of soils on airless bodies

    E-Print Network [OSTI]

    Perfect, Ed

    Mineralogical and chemical characterization of lunar highland soils: Insights into the space soils, with respect to their mineralogical and chemical makeup. It is these lunar soils that are being, A. Patchen, D.-H. S. Taylor, R. V. Morris, L. P. Keller, and D. S. McKay (2010), Mineralogical

  15. Penetration of UV-visible solar radiation in the global oceans: Insights from ocean color remote sensing

    E-Print Network [OSTI]

    Penetration of UV-visible solar radiation in the global oceans: Insights from ocean color remote 2013. [1] Penetration of solar radiation in the ocean is determined by the attenuation coefficient (Kd. Lewis, R. Arnone, and R. Brewin (2013), Penetration of UV-visible solar radiation in the global oceans

  16. Massive first-principles simulation provides insight into flame anchoring in a hydrogen-rich jet in cross-flow.

    E-Print Network [OSTI]

    in cross-flow. When gas turbine designers want to use gasified biomass for stationary power generation is far more reactive than the methane that is the traditional gas turbine fuel. This reactivity leads Science Simulations Provide New Insights to Aid Hydrogen Gas Turbine Development NREL Highlights SCIENCE

  17. The California rangeland decisionmaking survey provides important insights into defining sustainability on working landscapes. First, there is considerable heterogeneity

    E-Print Network [OSTI]

    Tate, Kenneth

    practices supporting multiple ecosystem service goals. Ranchers and rangeland managers already valueChampaign Sustaining working rangelands: Insights from rancher decision-making surveys and interviews Overview Methods systems in which society demands provisioning of both goods (e.g., livestock, forage production

  18. Folk Labeling: Insights on Improving Usability and Saving Energy Gleaned from After-Market Graffiti on Common Appliances

    E-Print Network [OSTI]

    Aragon, Cecilia R.

    Folk Labeling: Insights on Improving Usability and Saving Energy Gleaned from After-Market Graffiti for Energy and Environment Jessica Granderson, Gari Kloss and Alan Meier, Lawrence Berkeley National users often indicates problematic usability, which can affect the device's energy consumption

  19. Soil animal responses to moisture availability are largely scale, not ecosystem dependent: insight from a cross-site

    E-Print Network [OSTI]

    Wall, Diana

    Soil animal responses to moisture availability are largely scale, not ecosystem dependent: insight Cruces, NM 88012, USA, 4 USDA ARS Grassland Soil and Water Research Laboratory, Temple, TX 76502, USA, 5 Abstract Climate change will result in reduced soil water availability in much of the world either due

  20. One-Dimensional Barrier-Preserving Free-Energy Projections of a -sheet Miniprotein: New Insights into the Folding Process

    E-Print Network [OSTI]

    Caflisch, Amedeo

    One-Dimensional Barrier-Preserving Free-Energy Projections of a -sheet Miniprotein: New Insights simulations for a total of 20 µs. The resulting one-dimensional free-energy profiles (FEPs) provide a detailed description of the free-energy basins and barriers for the folding reaction. The similarity of the FEPs

  1. Ahmed, Rose, Figliozzi & Jacob 1 Commuter Cyclist's Sensitivity to Changes in Weather: Insight from Two Cities with

    E-Print Network [OSTI]

    Bertini, Robert L.

    Ahmed, Rose, Figliozzi & Jacob 1 Commuter Cyclist's Sensitivity to Changes in Weather: Insight from between various weather conditions and commuter bicyclist volume in two cities (Portland, USA and Brisbane may condition bicyclist's responsiveness to changes in weather and climate. Temporal variations

  2. NEW INSIGHTS INTO THE ORIGIN OF 14053 THE ONLY BASALTIC ROCK RETURNED BY APOLLO 14. Rhiannon G. Mayne1

    E-Print Network [OSTI]

    Taylor, Lawrence A.

    NEW INSIGHTS INTO THE ORIGIN OF 14053 ­ THE ONLY BASALTIC ROCK RETURNED BY APOLLO 14. Rhiannon G of Geological Sciences, University of Tennessee, Knoxville, Tennessee, 37996. Introduction: The Apollo 14 to the hy- pothesis that 14053 and other Apollo 14 hi-Al basalts actually had an impact-melt origin

  3. Insights into formation of semiconductor nanocrystals : from first principles calculations to kinetic models of nucleation and growth

    E-Print Network [OSTI]

    Rempel, Jane Yevgeniya

    2008-01-01T23:59:59.000Z

    Over the past decade the synthesis of colloidal semiconductor nanocrystals of diverse shapes and sizes has sparked tremendous interest in both the industrial and scientific communities. Much of the work thus far has been ...

  4. When and for whom would e-waste be a treasure trove? Insights from a network equilibrium model of

    E-Print Network [OSTI]

    Nagurney, Anna

    Progressively increasing environmental concerns for WEEE. Toyasaki/Wakolbinger/Nowak/Nagurney WEE flows June 12 environmental concerns for WEEE. WEEE is an important resource of precious metals. Toyasaki Progressively increasing environmental concerns for WEEE. WEEE is an important resource of precious metals. WEEE

  5. Low-latitude Western North Atlantic climate variability during the past millennium : insights from proxies and models

    E-Print Network [OSTI]

    Saenger, Casey Pearce

    2009-01-01T23:59:59.000Z

    Estimates of natural climate variability during the past millennium provide a frame of reference in which to assess the significance of recent changes. This thesis investigates new methods of reconstructing low-latitude ...

  6. An Information Flow Model of Fault Detection Margaret C. Thompson ?

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    not be practical. Nonethe­ less, Relay provides insight into testing and fault de­ tection and suggests an approach and Computer Science Amherst, MA 01003 University of California Irvine, CA 92717 Abstract Relay is a model of how a fault causes a failure on execution of some test datum. This process begins with introduction

  7. Using simulation to model and understand group learning Maartje Spoelstra

    E-Print Network [OSTI]

    Sklar, Elizabeth

    Using simulation to model and understand group learning Maartje Spoelstra Dept of Computer Science for agents acting in a simulated learning environment. Varying parameter values can change the learning in a simulation that we can use to gain insights into the design of effective learning environments. Here, we

  8. Thermochemical Insight into the Reduction of CO to CH3OH with [Re(CO)]+ and [Mn(CO)]+ Complexes

    SciTech Connect (OSTI)

    Wiedner, Eric S.; Appel, Aaron M.

    2014-05-22T23:59:59.000Z

    To gain insight into thermodynamic barriers for reduction of CO into CH3OH, free energies for reduction of [CpRe(PPh3)(NO)(CO)]+ into CpRe(PPh3)(NO)(CH2OH) have been determined from experimental measurements. Using model complexes, the free energies for the transfer of H+, H–, and e– have been determined. A pKa of 10.6 was estimated for [CpRe(PPh3)(NO)(CHOH)]+ by measuring the pKa for the analogous [CpRe(PPh3)(NO)(CMeOH)]+. The hydride donor ability (?G°H–) of CpRe(PPh3)(NO)(CH2OH) was estimated to be 58.0 kcal mol–1, based on calorimetry measurements of the hydride transfer reaction between CpRe(PPh3)(NO)(CHO) and [CpRe(PPh3)(NO)(CHOMe)]+ to generate the methylated analog, CpRe(PPh3)(NO)(CH2OMe). Cyclic voltammograms recorded on CpRe(PPh3)(NO)(CMeO), CpRe(PPh3)(NO)(CH2OMe), and [CpRe(PPh3)(NO)(CHOMe)]+ displayed either a quasireversible oxidation (neutral species) or reduction (cationic species). These potentials were used as estimates for the oxidation of CpRe(PPh3)(NO)(CHO) or CpRe(PPh3)(NO)(CH2OH), or the reduction of [CpRe(PPh3)(NO)(CHOH)]+. Combination of the thermodynamic data permits construction of three-dimensional free energy landscapes under varying conditions of pH and PH2. The free energy for H2 addition (?G°H2) to [CpRe(PPh3)(NO)(CO)]+ (+15 kcal mol–1) was identified as the most significant thermodynamic impediment for the reduction of CO. DFT computations indicate that ?G°H2 varies by only 4.3 kcal mol–1 across a series of [CpXRe(L)(NO)(CO)]+, while the experimental ?G°H– values for the analogous series of CpRe(PPh3)(NO)(CHO) varies by 12.9 kcal mol–1. The small range of ?G°H2 values is attributed to a minimal change in the C–O bond polarization upon modification of the ancillary ligands, as determined from the computed atomic charges. This work was supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Chemical Sciences, Geosciences & Biosciences. Pacific Northwest National Laboratory (PNNL) is a multiprogram national laboratory operated for DOE by Battelle.

  9. Chemical Kinetic Modeling of Advanced Transportation Fuels

    SciTech Connect (OSTI)

    PItz, W J; Westbrook, C K; Herbinet, O

    2009-01-20T23:59:59.000Z

    Development of detailed chemical kinetic models for advanced petroleum-based and nonpetroleum based fuels is a difficult challenge because of the hundreds to thousands of different components in these fuels and because some of these fuels contain components that have not been considered in the past. It is important to develop detailed chemical kinetic models for these fuels since the models can be put into engine simulation codes used for optimizing engine design for maximum efficiency and minimal pollutant emissions. For example, these chemistry-enabled engine codes can be used to optimize combustion chamber shape and fuel injection timing. They also allow insight into how the composition of advanced petroleum-based and non-petroleum based fuels affect engine performance characteristics. Additionally, chemical kinetic models can be used separately to interpret important in-cylinder experimental data and gain insight into advanced engine combustion processes such as HCCI and lean burn engines. The objectives are: (1) Develop detailed chemical kinetic reaction models for components of advanced petroleum-based and non-petroleum based fuels. These fuels models include components from vegetable-oil-derived biodiesel, oil-sand derived fuel, alcohol fuels and other advanced bio-based and alternative fuels. (2) Develop detailed chemical kinetic reaction models for mixtures of non-petroleum and petroleum-based components to represent real fuels and lead to efficient reduced combustion models needed for engine modeling codes. (3) Characterize the role of fuel composition on efficiency and pollutant emissions from practical automotive engines.

  10. Computational fire modeling for aircraft fire research

    SciTech Connect (OSTI)

    Nicolette, V.F.

    1996-11-01T23:59:59.000Z

    This report summarizes work performed by Sandia National Laboratories for the Federal Aviation Administration. The technical issues involved in fire modeling for aircraft fire research are identified, as well as computational fire tools for addressing those issues, and the research which is needed to advance those tools in order to address long-range needs. Fire field models are briefly reviewed, and the VULCAN model is selected for further evaluation. Calculations are performed with VULCAN to demonstrate its applicability to aircraft fire problems, and also to gain insight into the complex problem of fires involving aircraft. Simulations are conducted to investigate the influence of fire on an aircraft in a cross-wind. The interaction of the fuselage, wind, fire, and ground plane is investigated. Calculations are also performed utilizing a large eddy simulation (LES) capability to describe the large- scale turbulence instead of the more common k-{epsilon} turbulence model. Additional simulations are performed to investigate the static pressure and velocity distributions around a fuselage in a cross-wind, with and without fire. The results of these simulations provide qualitative insight into the complex interaction of a fuselage, fire, wind, and ground plane. Reasonable quantitative agreement is obtained in the few cases for which data or other modeling results exist Finally, VULCAN is used to quantify the impact of simplifying assumptions inherent in a risk assessment compatible fire model developed for open pool fire environments. The assumptions are seen to be of minor importance for the particular problem analyzed. This work demonstrates the utility of using a fire field model for assessing the limitations of simplified fire models. In conclusion, the application of computational fire modeling tools herein provides both qualitative and quantitative insights into the complex problem of aircraft in fires.

  11. Section 1603 Treasury Grant Expiration: Industry Insight on Financing and Market Implications

    SciTech Connect (OSTI)

    Mendelsohn, M.; Harper, J.

    2012-06-01T23:59:59.000Z

    In the wake of the 2008-2009 financial crises, tax equity investors largely withdrew from the market, resulting in stagnation of project development. In response, Congress established the Treasury grant program pursuant to Section 1603 of the American Recovery and Reinvestment Act (..Section..1603 Program) to offer a cash payment in lieu of a production and investment tax credit. This study addresses the likely project financing and market impacts from the expiration of the ..Section..1603 Program. The authors assembled an array of insights offered by financial executives active in the renewable energy (RE) market during conference panel discussions and in presentations, direct interviews, and email correspondences. This analysis found that the ..Section..1603 Program alleviated the need to monetize the tax credit incentives through specialized investors, helped lower the transaction and financing costs associated with renewable electricity projects, and generally supported an extensive build-out of renewable power generation capacity. With the expiration of the ..Section..1603 Program, smaller or less-established renewable power developers will have more difficulty attracting needed financial capital and completing their projects, development of projects relying on newer or 'innovative' technologies will likely slow as traditional tax equity investors are known to be highly averse to technology risk in the projects they fund, and, finally, projects relying on tax equity may be more expensive to develop due to higher transaction costs and potentially higher yields required to attract tax equity.

  12. Transcriptome Analysis of Manganese-deficient Chlamydomonas reinhardtii Provides Insight on the Chlorophyll Biosynthesis Pathway

    SciTech Connect (OSTI)

    Lockhart, Ainsley; Zvenigorodsky, Natasha; Pedraza, Mary Ann; Lindquist, Erika

    2011-08-11T23:59:59.000Z

    The biosynthesis of chlorophyll and other tetrapyrroles is a vital but poorly understood process. Recent genomic advances with the unicellular green algae Chlamydomonas reinhardtii have created opportunity to more closely examine the mechanisms of the chlorophyll biosynthesis pathway via transcriptome analysis. Manganese is a nutrient of interest for complex reactions because of its multiple stable oxidation states and role in molecular oxygen coordination. C. reinhardtii was cultured in Manganese-deplete Tris-acetate-phosphate (TAP) media for 24 hours and used to create cDNA libraries for sequencing using Illumina TruSeq technology. Transcriptome analysis provided intriguing insight on possible regulatory mechanisms in the pathway. Evidence supports similarities of GTR (Glutamyl-tRNA synthase) to its Chlorella vulgaris homolog in terms of Mn requirements. Data was also suggestive of Mn-related compensatory up-regulation for pathway proteins CHLH1 (Manganese Chelatase), GUN4 (Magnesium chelatase activating protein), and POR1 (Light-dependent protochlorophyllide reductase). Intriguingly, data suggests possible reciprocal expression of oxygen dependent CPX1 (coproporphyrinogen III oxidase) and oxygen independent CPX2. Further analysis using RT-PCR could provide compelling evidence for several novel regulatory mechanisms in the chlorophyll biosynthesis pathway.

  13. Generic risk insights for Westinghouse and Combustion Engineering pressurized water reactors

    SciTech Connect (OSTI)

    Travis, R.; Taylor, J.; Fresco, A. (Brookhaven National Lab., Upton, NY (USA)); Chung, J. (Nuclear Regulatory Commission, Washington, DC (USA))

    1990-11-01T23:59:59.000Z

    A methodology has been developed to extract generic risk-based information from probabilistic risk assessments (PRAs) of Westinghouse and Combustion Engineering (CE) pressurized water reactors (PWRs) and apply the insights gained to Westinghouse and Ce plants have not been subjected to a PRA. The available PRAs (five Westinghouse plants and one CE plant) were examined to identify the most probable, i.e., dominant accident sequences at each plant. The goal was to include all sequences which represented at least 80% of core damage frequency. If the same plant specific dominant accident sequence appeared within this boundary in at least two plant PRAs, the sequence was considered to be a representative sequence. Eleven sequences met this definition. From these sequences, the most important component failures and human errors that contributed to each sequence have been prioritized. Guidance is provided to prioritize the representative sequences and modify selected basic events that have been shown to be sensitive to the plant specific design or operating variations of the contributing PRAs. This risk-based guidance can be used for utility and NRC activities including operator training maintenance, design review, and inspections.

  14. Computational insights of water droplet transport on graphene sheet with chemical density

    SciTech Connect (OSTI)

    Zhang, Liuyang; Wang, Xianqiao, E-mail: xqwang@uga.edu [College of Engineering and NanoSEC, University of Georgia, Athens, Georgia 30602 (United States)

    2014-05-21T23:59:59.000Z

    Surface gradient has been emerging as an intriguing technique for nanoscale particle manipulation and transportation. Owing to its outstanding and stable chemical properties, graphene with covalently bonded chemical groups represents extraordinary potential for the investigation of nanoscale transport in the area of physics and biology. Here, we employ molecular dynamics simulations to investigate the fundamental mechanism of utilizing a chemical density on a graphene sheet to control water droplet motions on it. Simulation results have demonstrated that the binding energy difference among distinct segment of graphene in terms of interaction between the covalently bonded oxygen atoms on graphene and the water molecules provides a fundamental driving force to transport the water droplet across the graphene sheet. Also, the velocity of the water droplet has showed a strong dependence on the relative concentration of oxygen atoms between successive segments. Furthermore, a multi-direction channel provides insights to guide the transportation of objects towards a targeted position, separating the mixtures with a system of specific chemical functionalization. Our findings shed illuminating lights on the surface gradient method and therefore provide a feasible way to control nanoscale motion on the surface and mimic the channelless microfluidics.

  15. Insights From Laboratory Experiments On Simulated Faults With Application To Fracture Evolution In Geothermal Systems

    SciTech Connect (OSTI)

    Stephen L. Karner, Ph.D

    2006-06-01T23:59:59.000Z

    Laboratory experiments provide a wealth of information related to mechanics of fracture initiation, fracture propagation processes, factors influencing fault strength, and spatio-temporal evolution of fracture properties. Much of the existing literature reports on laboratory studies involving a coupling of thermal, hydraulic, mechanical, and/or chemical processes. As these processes operate within subsurface environments exploited for their energy resource, laboratory results provide insights into factors influencing the mechanical and hydraulic properties of geothermal systems. I report on laboratory observations of strength and fluid transport properties during deformation of simulated faults. The results show systematic trends that vary with stress state, deformation rate, thermal conditions, fluid content, and rock composition. When related to geophysical and geologic measurements obtained from engineered geothermal systems (e.g. microseismicity, wellbore studies, tracer analysis), laboratory results provide a means by which the evolving thermal reservoir can be interpreted in terms of physico-chemical processes. For example, estimates of energy release and microearthquake locations from seismic moment tensor analysis can be related to strength variations observed from friction experiments. Such correlations between laboratory and field data allow for better interpretations about the evolving mechanical and fluid transport properties in the geothermal reservoir – ultimately leading to improvements in managing the resource.

  16. New insight into the Solar System's transition disk phase provided by the unusual meteorite Isheyevo

    E-Print Network [OSTI]

    Morris, Melissa A; Knauth, L Paul

    2014-01-01T23:59:59.000Z

    Many aspects of planet formation are controlled by the amount of gas remaining in the natal protoplanetary disk (PPDs). Infrared observations show that PPDs undergo a transition stage at several Myr, during which gas densities are reduced. Our Solar System would have experienced such a stage. However, there is currently no data that provides insight into this crucial time in our PPD's evolution. We show that the Isheyevo meteorite contains the first definitive evidence for a transition disk stage in our Solar System. Isheyevo belongs to a class of metal-rich meteorites whose components have been dated at almost 5 Myr after the first solids in the Solar System, and exhibits unique sedimentary layers that imply formation through gentle sedimentation. We show that such layering can occur via gentle sweep-up of material found in the impact plume resulting from the collision of two planetesimals. Such sweep-up requires gas densities consistent with observed transition disks. As such, Isheyevo presents the first ev...

  17. Insights gained from in-depth reviews of several industry generated PRAs

    SciTech Connect (OSTI)

    Pratt, W.T.; Khatib-Rahbar, M.; Bari, R.A.; Rosenthal, J.

    1985-01-01T23:59:59.000Z

    During the last several years BNL staff have performed in-depth reviews of the containment failure modes and fission product release analyses of all the ''industry'' PRAs submitted to the Office of Nuclear Reactor Regulation, NRC. This program started with a reevaluation of the risks reported in the Zion and Indian Point Probabilistic Safety Studies (PWRs with large dry containments) and was followed by reviews of the Limerick (BWR with Mark II containment) and Big Rock Point (early BWR design) PRAs. We are currently completing reviews of the GESSAR-II (BWR with a Mark III containment) and Millstone-3 (PWR with a subatmospheric containment) PRAs. This paper therefore presents the insights gained from extensive reevaluations of the risk associated with a wide range of reactor and containment designs. In particular, the paper shows how changing methodology has influenced our understanding of containment performance under degraded core conditions and how this influences the frequency, timing and magnitude of fission product release to the environment, which in turn impacts potential off-site consequences. 18 refs.

  18. Structural insight into nucleotide recognition by human death-associated protein kinase

    SciTech Connect (OSTI)

    McNamara, Laurie K.; Watterson, D.M.; Brunzelle, Joseph S.; (NWU)

    2009-06-01T23:59:59.000Z

    Death-associated protein kinase (DAPK) is a member of the Ca{sup 2+}/calmodulin-regulated family of serine/threonine protein kinases. The role of the kinase activity of DAPK in eukaryotic cell apoptosis and the ability of bioavailable DAPK inhibitors to rescue neuronal death after brain injury have made it a drug-discovery target for neurodegenerative disorders. In order to understand the recognition of nucleotides by DAPK and to gain insight into DAPK catalysis, the crystal structure of human DAPK was solved in complex with ADP and Mg{sup 2+} at 1.85 {angstrom} resolution. ADP is a product of the kinase reaction and product release is considered to be the rate-limiting step of protein kinase catalytic cycles. The structure of DAPK-ADP-Mg{sup 2+} was compared with a newly determined DAPK-AMP-PNP-Mg{sup 2+} structure and the previously determined apo DAPK structure (PDB code 1 jks). The comparison shows that nucleotide-induced changes are localized to the glycine-rich loop region of DAPK.

  19. Structural Insight into the Mechanisms of Enveloped Virus Tethering by Tetherin

    SciTech Connect (OSTI)

    H Yang; J Wang; X Jia; M McNatt; T Zang; B Pan; W Meng; H Wang; P Bieniasz; Y Xiong

    2011-12-31T23:59:59.000Z

    Tetherin/BST2 is a type-II membrane protein that inhibits the release of a range of enveloped viruses, including HIV-1. Here we report three crystal structures of human tetherin, including the full-length ectodomain, a triple cysteine mutant and an ectodomain truncation. These structures show that tetherin forms a continuous alpha helix encompassing almost the entire ectodomain. Tetherin helices dimerize into parallel coiled coils via interactions throughout the C-terminal portion of the ectodomain. A comparison of the multiple structures of the tetherin dimer reveals inherent constrained flexibility at two hinges positioned at residues A88 and G109. In the crystals, two tetherin ectodomain dimers associate into a tetramer by forming an antiparallel four-helix bundle at their N termini. However, mutagenesis studies suggest that the tetrametric form of tetherin, although potentially contributing to, is not essential for its antiviral activity. Nonetheless, the structural and chemical properties of the N terminus of the ectodomain are important for optimal tethering function. This study provides detailed insight into the mechanisms by which this broad-spectrum antiviral restriction factor can function.

  20. Structural insight into the mechanisms of enveloped virus tethering by tetherin

    SciTech Connect (OSTI)

    Yang, Haitao; Wang, Jimin; Jia, Xiaofei; McNatt, Matthew W.; Zang, Trinity; Pan, Baocheng; Meng, Wuyi; Wang, Hong-Wei; Bieniasz, Paul D.; Xiong, Yong (Yale); (Rockefeller)

    2010-11-10T23:59:59.000Z

    Tetherin/BST2 is a type-II membrane protein that inhibits the release of a range of enveloped viruses, including HIV-1. Here we report three crystal structures of human tetherin, including the full-length ectodomain, a triple cysteine mutant and an ectodomain truncation. These structures show that tetherin forms a continuous alpha helix encompassing almost the entire ectodomain. Tetherin helices dimerize into parallel coiled coils via interactions throughout the C-terminal portion of the ectodomain. A comparison of the multiple structures of the tetherin dimer reveals inherent constrained flexibility at two hinges positioned at residues A88 and G109. In the crystals, two tetherin ectodomain dimers associate into a tetramer by forming an antiparallel four-helix bundle at their N termini. However, mutagenesis studies suggest that the tetrametric form of tetherin, although potentially contributing to, is not essential for its antiviral activity. Nonetheless, the structural and chemical properties of the N terminus of the ectodomain are important for optimal tethering function. This study provides detailed insight into the mechanisms by which this broad-spectrum antiviral restriction factor can function.

  1. Wild Fire Computer Model Helps Firefighters

    ScienceCinema (OSTI)

    Canfield, Jesse

    2014-06-02T23:59:59.000Z

    A high-tech computer model called HIGRAD/FIRETEC, the cornerstone of a collaborative effort between U.S. Forest Service Rocky Mountain Research Station and Los Alamos National Laboratory, provides insights that are essential for front-line fire fighters. The science team is looking into levels of bark beetle-induced conditions that lead to drastic changes in fire behavior and how variable or erratic the behavior is likely to be.

  2. Eddy Current Model of Ball Lightning

    E-Print Network [OSTI]

    J. D. Shelton

    2011-02-07T23:59:59.000Z

    Eddy Current Model of Ball Lightning Calculations show that high-energy ball lightning may consist of a ball of plasma containing a large circular electric current arising as an eddy current generated by lightning. Synthetic ball lightning might serve as a method of plasma confinement for purposes of nuclear fusion. In this paper, three articles concerning ball lightning and the related phenomenon of large ball lightning are combined to provide insight into this rarely glimpsed occurrence.

  3. Project Profile: Predictive Physico-Chemical Modeling of Intrinsic Degradation Mechanisms for Advanced Reflector Materials

    Broader source: Energy.gov [DOE]

    NREL, under the Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar (PREDICTS) Program will be developing a physics-based computational degradation model to assess the kinetic oxidation rates; realistic model light attenuation and transport; and multi-layer treatment with variable properties Simulation based experimental design.

  4. World gold prices and stock returns in China: insights for hedging and diversification strategies

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    make use of several multivariate GARCH models (CCC-, DCC-, BEKK-, diagonal BEKK-, and VAR-GARCH exposures can be effectively hedged in portfolios of stocks over time. Finally, we show that the VAR-GARCH model performs better than the other multivariate GARCH models. Keywords: Stock markets, gold prices

  5. Houses as ATMs? Mortgage Refinancing and Macroeconomic Uncertainty

    E-Print Network [OSTI]

    Sadeh, Norman M.

    Michael Michaux USC Marshall Nikolai Roussanov Wharton and NBER September 11, 2011 Abstract Mortgage Kaplan, Dirk Krueger, Debbie Lucas, Hanno Lustig, Vincenzo Quadrini, Monika Piazzesi, Victor Rios

  6. Economics 309 Fall 2000 Macroeconomics I Mr. Miller

    E-Print Network [OSTI]

    Ahmad, Sajjad

    of Monetary Economics, September 1982. 3. Perron, "The Great Crash, the Oil Price Shock, and the Unit Root. Demand for Labor 2. Supply of Labor 3. Market Equilibrium A. Goods Markets 1. Consumption Demand 2. Investment Demand 3. Saving Equals Investment A. Asset Markets 1. Demand for Money 2. Supply of Money 3

  7. Introduction to Macroeconomic Dynamics Special Issue on Oil Price Shocks

    E-Print Network [OSTI]

    Garousi, Vahid

    shocks, Oil price uncertainty, Nonlinearity in the Oil Price- Output Relationship. 2 #12;Table Production: Is the Relationship Linear?" John Elder and Apostolos Serletis, "Volatility in Oil Prices-Term Oil Price Forecasts: A New Perspective on Oil and the Macroeconomy." 3 #12;1 Overview The relationship

  8. The macroeconomic dimension of agriculture and food policy reform

    E-Print Network [OSTI]

    Rausser, Gordon C.

    1988-01-01T23:59:59.000Z

    and Performance Links Between LDC Debtors and Industrialless-developed countries (LDC). Third~ political economicpolicies can affect an LDC, espe- cially a commodity-

  9. Essays in Empirical Macroeconomics: Applications to the GCC Monetary Union

    E-Print Network [OSTI]

    Al-Hassan, Abdullah Mohammed

    2008-01-01T23:59:59.000Z

    for several different reasons. First, it accounts for 45% of proven global oil reserves, and 25% of global natural gas reserves. The GCC area produces 22% and 6.5% of global oil and gas output, respectively. Second, table 1.1 shows the aggregate GDP... reserves that were accumulated from excess oil revenues. Thus, central banks in the GCC area opted to use foreign asset reserves instead of monetizing the fiscal deficits. The high degree of convergence and stability among exchange rates in the GCC...

  10. Essays on the macroeconomics of the labor markets

    E-Print Network [OSTI]

    Guerrieri, Veronica

    2006-01-01T23:59:59.000Z

    In Chapter 1, I study the efficiency properties of competitive search equilibria in economies with informational asymmetries. Employers and workers are both risk-neutral and ex-ante homogeneous. I characterize an equilibrium ...

  11. KDD Project Thesis Data Mining in Macroeconomic Data Sets

    E-Print Network [OSTI]

    Gordon, Geoffrey J.

    .......................................................................................................................... 34 Appendix ­ Oil Price Chronology-sector dependence evolution by investigating the historical EIO data over the years 1947-1982. Here we make

  12. Labor Market Frictions, Interest Rates, and Macroeconomic Policies

    E-Print Network [OSTI]

    Zhang, Ji

    a large decline of the whole economy, unconventional creditdecline, but raise unemployment and slow the recovery of the labor market. Unconventionaldecline, but raise unem- ployment and slow the recovery of the labor market. Unconventional

  13. Energy Production and Trade: An Overview of Some Macroeconomic Issues

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40Coal Stocks at1,066,688Electricity Use as an IndicatorNatural Gas Monthly

  14. Assumption to the Annual Energy Outlook 2014 - Macroeconomic Activity Module

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for On-Highway4,1,50022,3,,,,6,1,9,1,50022,3,,,,6,1,Decade Year-0E (2001)gasoline prices4 OilU.S.5Are thereDemandEnergy

  15. Crystal Structures of the Tetratricopeptide Repeat Domains of Kinesin Light Chains: Insight into Cargo Recognition Mechanisms

    SciTech Connect (OSTI)

    Zhu, Haizhong; Lee, Han Youl; Tong, Yufeng; Hong, Bum-Soo; Kim, Kyung-Phil; Shen, Yang; Lim, Kyung Jik; Mackenzie, Farrell; Tempel, Wolfram; Park, Hee-Won (SGC-Toronto); (PPCS); (Toronto)

    2012-10-23T23:59:59.000Z

    Kinesin-1 transports various cargos along the axon by interacting with the cargos through its light chain subunit. Kinesin light chains (KLC) utilize its tetratricopeptide repeat (TPR) domain to interact with over 10 different cargos. Despite a high sequence identity between their TPR domains (87%), KLC1 and KLC2 isoforms exhibit differential binding properties towards some cargos. We determined the structures of human KLC1 and KLC2 tetratricopeptide repeat (TPR) domains using X-ray crystallography and investigated the different mechanisms by which KLCs interact with their cargos. Using isothermal titration calorimetry, we attributed the specific interaction between KLC1 and JNK-interacting protein 1 (JIP1) cargo to residue N343 in the fourth TRP repeat. Structurally, the N343 residue is adjacent to other asparagines and lysines, creating a positively charged polar patch within the groove of the TPR domain. Whereas, KLC2 with the corresponding residue S328 did not interact with JIP1. Based on these finding, we propose that N343 of KLC1 can form 'a carboxylate clamp' with its neighboring asparagine to interact with JIP1, similar to that of HSP70/HSP90 organizing protein-1's (HOP1) interaction with heat shock proteins. For the binding of cargos shared by KLC1 and KLC2, we propose a different site located within the groove but not involving N343. We further propose a third binding site on KLC1 which involves a stretch of polar residues along the inter-TPR loops that may form a network of hydrogen bonds to JIP3 and JIP4. Together, these results provide structural insights into possible mechanisms of interaction between KLC TPR domains and various cargo proteins.

  16. Structural and mechanistic insights into Mcm2-7 double-hexamer assembly and function

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

    Sun, Jingchuan; Li, Huilin; Fernandez-Cid, Alejandra; Riera, Alberto; Tognetti, Sivia; Yuan, Zuanning; Stillman, Bruce; Speck, Christian

    2014-10-15T23:59:59.000Z

    Eukaryotic cells license each DNA replication origin during G1 phase by assembling a prereplication complex that contains a Mcm2–7 (minichromosome maintenance proteins 2–7) double hexamer. During S phase, each Mcm2–7 hexamer forms the core of a replicative DNA helicase. However, the mechanisms of origin licensing and helicase activation are poorly understood. The helicase loaders ORC–Cdc6 function to recruit a single Cdt1–Mcm2–7 heptamer to replication origins prior to Cdt1 release and ORC–Cdc6–Mcm2–7 complex formation, but how the second Mcm2–7 hexamer is recruited to promote double-hexamer formation is not well understood. Here, structural evidence for intermediates consisting of an ORC–Cdc6–Mcm2–7 complex andmore »an ORC–Cdc6–Mcm2–7–Mcm2–7 complex are reported, which together provide new insights into DNA licensing. Detailed structural analysis of the loaded Mcm2–7 double-hexamer complex demonstrates that the two hexamers are interlocked and misaligned along the DNA axis and lack ATP hydrolysis activity that is essential for DNA helicase activity. Moreover, we show that the head-to-head juxtaposition of the Mcm2–7 double hexamer generates a new protein interaction surface that creates a multisubunit-binding site for an S-phase protein kinase that is known to activate DNA replication. The data suggest how the double hexamer is assembled and how helicase activity is regulated during DNA licensing, with implications for cell cycle control of DNA replication and genome stability.« less

  17. Structural and mechanistic insights into Mcm2-7 double-hexamer assembly and function

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

    Sun, Jingchuan [Brookhaven National Laboratory (BNL), Upton, NY (United States); Li, Huilin [Brookhaven National Laboratory (BNL), Upton, NY (United States); Stony Brook Univ., Stony Brook, NY (United States); Fernandez-Cid, Alejandra [Imperial College Faculty of Medicine, London (United Kingdom). DNA Replication Group; Riera, Alberto [Imperial College Faculty of Medicine, London (United Kingdom). MRC Clinical Sciences Centre; Tognetti, Sivia [Imperial College Faculty of Medicine, London (United Kingdom). MRC Clinical Sciences Centre; Yuan, Zuanning [Stony Brook Univ., Stony Brook, NY (United States); Stillman, Bruce [Cold Spring Harbor Lab., NY (United States); Speck, Christian [Imperial College Faculty of Medicine, London (United Kingdom). DNA Replication Group

    2014-10-15T23:59:59.000Z

    Eukaryotic cells license each DNA replication origin during G1 phase by assembling a prereplication complex that contains a Mcm2–7 (minichromosome maintenance proteins 2–7) double hexamer. During S phase, each Mcm2–7 hexamer forms the core of a replicative DNA helicase. However, the mechanisms of origin licensing and helicase activation are poorly understood. The helicase loaders ORC–Cdc6 function to recruit a single Cdt1–Mcm2–7 heptamer to replication origins prior to Cdt1 release and ORC–Cdc6–Mcm2–7 complex formation, but how the second Mcm2–7 hexamer is recruited to promote double-hexamer formation is not well understood. Here, structural evidence for intermediates consisting of an ORC–Cdc6–Mcm2–7 complex and an ORC–Cdc6–Mcm2–7–Mcm2–7 complex are reported, which together provide new insights into DNA licensing. Detailed structural analysis of the loaded Mcm2–7 double-hexamer complex demonstrates that the two hexamers are interlocked and misaligned along the DNA axis and lack ATP hydrolysis activity that is essential for DNA helicase activity. Moreover, we show that the head-to-head juxtaposition of the Mcm2–7 double hexamer generates a new protein interaction surface that creates a multisubunit-binding site for an S-phase protein kinase that is known to activate DNA replication. The data suggest how the double hexamer is assembled and how helicase activity is regulated during DNA licensing, with implications for cell cycle control of DNA replication and genome stability.

  18. Consistent nonlinear dynamics: identifying model inadequacy

    E-Print Network [OSTI]

    Patrick E. McSharry; Leonard A. Smith

    2004-03-09T23:59:59.000Z

    Empirical modelling often aims for the simplest model consistent with the data. A new technique is presented which quantifies the consistency of the model dynamics as a function of location in state space. As is well-known, traditional statistics of nonlinear models like root-mean-square (RMS) forecast error can prove misleading. Testing consistency is shown to overcome some of the deficiencies of RMS error, both within the perfect model scenario and when applied to data from several physical systems using previously published models. In particular, testing for consistent nonlinear dynamics provides insight towards (i) identifying when a delay reconstruction fails to be an embedding, (ii) allowing state dependent model selection and (iii) optimising local neighbourhood size. It also provides a more relevant (state dependent) threshold for identifying false nearest neighbours.

  19. Insights into Ubiquitin Transfer Cascades from a Structure of a UbcH5B[is equivalent to]Ubiquitin-HECT[superscript NEDD4L] Complex

    SciTech Connect (OSTI)

    Kamadurai, Hari B.; Souphron, Judith; Scott, Daniel C.; Duda, David M.; Miller, Darcie J.; Stringer, Daniel; Piper, Robert C.; Schulman, Brenda A.; (SJCH)

    2010-02-23T23:59:59.000Z

    In E1-E2-E3 ubiquitin (Ub) conjugation cascades, the E2 first forms a transient E2 {approx} Ub covalent complex and then interacts with an E3 for Ub transfer. For cascades involving E3s in the HECT class, Ub is transferred from an associated E2 to the acceptor cysteine in the HECT domain C lobe. To gain insights into this process, we determined the crystal structure of a complex between the HECT domain of NEDD4L and the E2 UbcH5B bearing a covalently linked Ub at its active site (UbcH5B {approx} Ub). Noncovalent interactions between UbcH5B and the HECT N lobe and between Ub and the HECT domain C lobe lead to an overall compact structure, with the Ub C terminus sandwiched between UbcH5B and HECT domain active sites. The structure suggests a model for E2-to-HECT Ub transfer, in which interactions between a donor Ub and an acceptor domain constrain upstream and downstream enzymes for conjugation.

  20. Behavior of the mass transfer coefficient during the MADE-2 experiment: New insights

    E-Print Network [OSTI]

    Zhou, Quanlin

    differences in advection that are probably the root cause of dispersion in natural heterogeneous sediments model, a more complete analysis of the MADE-2 experiment, a natural gradient tracer (tritium) test conductivity (K) measurements and interpolations, mass transfer rate expressions and conceptual errors in model

  1. Biofuel-Food Market Interactions:A Review of Modeling Approaches and Findings

    SciTech Connect (OSTI)

    Oladosu, Gbadebo A [ORNL; Msangi, Siwa [International Food and Policy Research Institute (IFPRI)

    2013-01-01T23:59:59.000Z

    The interaction between biofuels and food markets remains a policy issue for a number of reasons. There is a continuing need to understand the role of biofuels in the recent spikes in global food prices. Also, there is an ongoing discussion of changes to biofuel policy as a means to cope with severe weather-induced crop losses. Lastly, there are potential interactions between food markets and advanced biofuels, although most of the latter are expected to be produced from non-food feedstocks. This study reviews the existing literature on the food market impacts of biofuels. Findings suggest that initial conclusions attributing most of the spike in global food prices between 2005 and 2008 to biofuels have been revised. Instead, a multitude of factors, in addition to biofuels, converged during the period. Quantitative estimates of the impacts of biofuels on food markets vary significantly due to differences in modeling approaches, geographical scope, and assumptions about a number of crucial factors. In addition, many studies do not adequately account for the effects of macroeconomic changes, adverse weather conditions and direct market interventions during the recent food price spikes when evaluating the role of biofuels.

  2. Modeling of fundamental phenomena in welds

    SciTech Connect (OSTI)

    Zacharia, T.; Vitek, J.M. [Oak Ridge National Lab., TN (United States); Goldak, J.A. [Carleton Univ., Ottawa, Ontario (Canada); DebRoy, T.A. [Pennsylvania State Univ., University Park, PA (United States); Rappaz, M. [Ecole Polytechnique Federale de Lausanne (Switzerland); Bhadeshia, H.K.D.H. [Cambridge Univ. (United Kingdom)

    1993-12-31T23:59:59.000Z

    Recent advances in the mathematical modeling of fundamental phenomena in welds are summarized. State-of-the-art mathematical models, advances in computational techniques, emerging high-performance computers, and experimental validation techniques have provided significant insight into the fundamental factors that control the development of the weldment. The current status and scientific issues in the areas of heat and fluid flow in welds, heat source metal interaction, solidification microstructure, and phase transformations are assessed. Future research areas of major importance for understanding the fundamental phenomena in weld behavior are identified.

  3. A Modest Revision of the Standard Model

    E-Print Network [OSTI]

    G. J. Stephenson, Jr.; T. Goldman

    2015-03-13T23:59:59.000Z

    With a modest revision of the mass sector of the Standard Model, the systematics of the fermion masses and mixings can be fully described and interpreted as providing information on matrix elements of physics beyond the Standard Model. A by-product is a reduction of the largest Higgs Yukawa fine structure constant by an order of magnitude. The extension to leptons provides for insight on the difference between quark mixing and lepton mixing as evidenced in neutrino oscillations. The large difference between the scale for up-quark and down-quark masses is not addressed.

  4. A Modest Revision of the Standard Model

    E-Print Network [OSTI]

    Stephenson,, G J

    2015-01-01T23:59:59.000Z

    With a modest revision of the mass sector of the Standard Model, the systematics of the fermion masses and mixings can be fully described and interpreted as providing information on matrix elements of physics beyond the Standard Model. A by-product is a reduction of the largest Higgs Yukawa fine structure constant by an order of magnitude. The extension to leptons provides for insight on the difference between quark mixing and lepton mixing as evidenced in neutrino oscillations. The large difference between the scale for up-quark and down-quark masses is not addressed.

  5. Insights into subgenomic RNA synthesis in coronaviruses from structural and biophysical studies

    E-Print Network [OSTI]

    Li, Lichun

    2009-05-15T23:59:59.000Z

    The 5’ untranslated region (UTR) of coronaviral genomes contains cis-acting sequences necessary for replication, transcription and translation. A consensus secondary structural model of the 5' 140 nucleotides of the 5' UTRs of nine coronaviruses (Co...

  6. Slip on ridge transform faults : insights from earthquakes and laboratory experiments

    E-Print Network [OSTI]

    Boettcher, Margaret S

    2005-01-01T23:59:59.000Z

    The relatively simple tectonic environment of mid-ocean ridge transform fault (RTF) seismicity provides a unique opportunity for investigation of earthquake and faulting processes. We develop a scaling model that is complete ...

  7. Disease in Natural Plant Populations, Communities, and Ecosystems: Insights into Ecological and Evolutionary Processes

    E-Print Network [OSTI]

    Alexander, Helen M.

    2010-05-01T23:59:59.000Z

    ) included both crop landscapes and patches of unman- aged vegetation in models of soybean rust epidemiology and illus- trated that noncrop plants (such as kudzu, Pueraria montana var. lobata) could play an important role in overwintering survival...

  8. Conversion of CO2 to Polycarbonates and Other Materials: Insights through Computational Chemistry

    E-Print Network [OSTI]

    Yeung, Andrew D

    2014-09-25T23:59:59.000Z

    The use of carbon dioxide as a chemical feedstock for the copolymerization with epoxides to give polycarbonates, and for coupling with hydrocarbons to give carboxylic acids, was probed using computational chemistry. Metal-free systems were modeled...

  9. Logistics Network Design with Differentiated Delivery Lead-Time: Benefits and Insights

    E-Print Network [OSTI]

    Cheong, Michelle L.F.

    Most logistics network design models assume exogenous customer demand that is independent of the service time or level. This paper examines the benefits of segmenting demand according to lead-time sensitivity of customers. ...

  10. Coral calcification : insights from inorganic experiments and coral responses to environmental variables

    E-Print Network [OSTI]

    Holcomb, Michael (Michael C.)

    2010-01-01T23:59:59.000Z

    The mechanisms involved in the formation of coral skeletons are examined using a laboratory model for coral calcification and the growth of living corals under different environmental conditions. Abiogenic aragonite was ...

  11. Recent advances in modeling stellar interiors (u)

    SciTech Connect (OSTI)

    Guzik, Joyce Ann [Los Alamos National Laboratory

    2010-01-01T23:59:59.000Z

    Advances in stellar interior modeling are being driven by new data from large-scale surveys and high-precision photometric and spectroscopic observations. Here we focus on single stars in normal evolutionary phases; we will not discuss the many advances in modeling star formation, interacting binaries, supernovae, or neutron stars. We review briefly: (1) updates to input physics of stellar models; (2) progress in two and three-dimensional evolution and hydrodynamic models; (3) insights from oscillation data used to infer stellar interior structure and validate model predictions (asteroseismology). We close by highlighting a few outstanding problems, e.g., the driving mechanisms for hybrid {gamma} Dor/{delta} Sct star pulsations, the cause of giant eruptions seen in luminous blue variables such as {eta} Car and P Cyg, and the solar abundance problem.

  12. Shell model Monte Carlo methods

    SciTech Connect (OSTI)

    Koonin, S.E. [California Inst. of Tech., Pasadena, CA (United States). W.K. Kellogg Radiation Lab.; Dean, D.J. [Oak Ridge National Lab., TN (United States)

    1996-10-01T23:59:59.000Z

    We review quantum Monte Carlo methods for dealing with large shell model problems. These methods reduce the imaginary-time many-body evolution operator to a coherent superposition of one-body evolutions in fluctuating one-body fields; resultant path integral is evaluated stochastically. We first discuss the motivation, formalism, and implementation of such Shell Model Monte Carlo methods. There then follows a sampler of results and insights obtained from a number of applications. These include the ground state and thermal properties of pf-shell nuclei, thermal behavior of {gamma}-soft nuclei, and calculation of double beta-decay matrix elements. Finally, prospects for further progress in such calculations are discussed. 87 refs.

  13. Asthenospheric upwelling, oceanic slab retreat, and exhumation of UHP mantle rocks: Insights from Greater Antilles

    E-Print Network [OSTI]

    of the Greater Antilles in Hispaniola. We use numerical models of intra-oceanic subduction to explain exhumation Antilles in Hispaniola [Abbott et al., 2006; Abbott et al., 2005]. Field observations show that the garnet and Hispaniola islands [e.g., Lewis et al., 2006]. It was formed during subduction of the Proto-Caribbean oceanic

  14. Transmembrane Helix Orientation and Dynamics: Insights from Ensemble Dynamics with Solid-State NMR Observables

    E-Print Network [OSTI]

    Jo, Sunhwan; Im, Wonpil

    2011-06-22T23:59:59.000Z

    observables, but important motional information can be missing or misinterpreted in the model. In this work, we have investigated the orientation of the single-pass transmembrane domain of viral protein ”u“ (VpuTM) from HIV-1 by determining an ensemble...

  15. Diagnostic indicators for integrated assessment models of climate policy

    SciTech Connect (OSTI)

    Kriegler, Elmar; Petermann, Nils; Krey, Volker; Schwanitz, Jana; Luderer, Gunnar; Ashina, Shuichi; Bosetti, Valentina; Eom, Jiyong; Kitous, Alban; Mejean, Aurelie; Paroussos, Leonidas; Sano, Fuminori; Turton, Hal; Wilson, Charlie; Van Vuuren, Detlef

    2015-01-01T23:59:59.000Z

    Integrated assessments of how climate policy interacts with energy-economic systems can be performed by a variety of models with different functional structures. This article proposes a diagnostic scheme that can be applied to a wide range of integrated assessment models to classify differences among models based on their carbon price responses. Model diagnostics can uncover patterns and provide insights into why, under a given scenario, certain types of models behave in observed ways. Such insights are informative since model behavior can have a significant impact on projections of climate change mitigation costs and other policy-relevant information. The authors propose diagnostic indicators to characterize model responses to carbon price signals and test these in a diagnostic study with 11 global models. Indicators describe the magnitude of emission abatement and the associated costs relative to a harmonized baseline, the relative changes in carbon intensity and energy intensity and the extent of transformation in the energy system. This study shows a correlation among indicators suggesting that models can be classified into groups based on common patterns of behavior in response to carbon pricing. Such a classification can help to more easily explain variations among policy-relevant model results.

  16. Insight into methanol synthesis from CO2 hydrogenation on Cu(111): Complex reaction network and the effects of H2O

    SciTech Connect (OSTI)

    Zhao, Yafan; Yang, Yong; Mims, Charles A.; Peden, Charles HF; Li, Jun; Mei, Donghai

    2011-05-31T23:59:59.000Z

    Methanol synthesis from CO2 hydrogenation on supported Cu catalysts is of considerable importance in the chemical and energy industries. Although extensive experimental and theoretical efforts have been carried out in the past decades, the most fundamental questions such as the reaction mechanisms and the key reaction intermediates are still in debate. In the present work, a comprehensive reaction network for CO2 hydrogenation to methanol on Cu(111) was studied using periodic density functional theory (DFT) calculations. All of the elementary reaction steps in the reaction network were identified in an unbiased way with the dimer method. Our calculation results show that methanol synthesis from direct hydrogenation of formate on Cu(111) is not feasible due to the high activation barriers for some of the elementary steps. Instead, we find that CO2 hydrogenation to hydrocarboxyl (trans-COOH) is kinetically more favorable than formate in the presence of H2O via a unique proton transfer mechanism. The trans-COOH is then converted into hydroxymethylidyne (COH) via dihydroxycarbene (COHOH) intermediates, followed by three consecutive hydrogenation steps to form hydroxymethylene (HCOH), hydroxymethyl (H2COH), and methanol. This is consistent with recent experimental observations [1], which indicate that direct hydrogenation of formate will not produce methanol under dry hydrogen conditions. Thus, both experiment and computational modeling clearly demonstrate the important role of trace amounts of water in methanol synthesis from CO2 hydrogenation on Cu catalysts. The proposed methanol synthesis route on Cu(111) not only provides new insights into methanol synthesis chemistry, but also demonstrates again that spectroscopically observed surface species are often not critical reaction intermediates but rather spectator species. Pacific Northwest National Laboratory is operated by Battelle for the US Department of Energy.

  17. Analysis of methods and models for assessing the direct and indirect economic impacts of CO/sub 2/-induced environmental changes in the agricultural sector of the US economy

    SciTech Connect (OSTI)

    Callaway, J.M.

    1982-08-01T23:59:59.000Z

    Alternative methods for quantifying the economic impacts associated with future increases in the ambient concentration of CO/sub 2/ were examined. A literature search was undertaken, both to gain a better understanding of the ways in which CO/sub 2/ buildup could affect crop growth and to identify the different methods available for assessing the impacts of CO/sub 2/-induced environmental changes on crop yields. The second task involved identifying the scope of both the direct and indirect economic impacts that could occur as a result of CO/sub 2/-induced changes in crop yields. The third task then consisted of a comprehensive literature search to identify what types of economic models could be used effectively to assess the kinds of direct and indirect economic impacts that could conceivably occur as a result of CO/sub 2/ buildup. Specific attention was focused upon national and multi-regional agricultural sector models, multi-country agricultural trade models, and macroeconomic models of the US economy. The fourth and final task of this research involved synthesizing the information gathered in the previous tasks into a systematic framework for assessing the direct and indirect economic impacts of CO/sub 2/-induced environmental changes related to agricultural production.

  18. Insights into the mechanism of a G-quadruplex-unwinding DEAH-box helicase

    E-Print Network [OSTI]

    Chen, Michael C.; Murat, Pierre; Abecassis, Keren; Ferré-D’Amaré, Adrian R.; Balasubramanian, Shankar

    2015-02-04T23:59:59.000Z

    contained 4 nM DHX36 and 4 nM Z33 G4. The mix- ture was then incubated for an additional 10 min at 37?C before being analyzed by PAGE. Gels were either directly imaged or dried using a BioRad Model 583 Gel Drier and exposed to a storage phosphor screen... . Crystallogr., 60, 2126–2132. 27. Akman,S.A., Lingeman,R.G., Doroshow,J.H. and Smith,S.S. (1991) Quadruplex DNA formation in a region of the tRNA gene supF Nucleic Acids Research, 2015, Vol. 43, No. 4 2231 associated with hydrogen peroxide mediated mutations...

  19. Somatic Sex Determination in D. melanogaster: Insights in the Establishment to Maintenance Transition

    E-Print Network [OSTI]

    Gonzalez Rojos, Alejandra Noemi

    2012-07-16T23:59:59.000Z

    Pe to regulation by SxlPm occurs. The sisA protein (SisA), as part of the b-ZIP protein family, is thought to bind to its target as a dimer, but a dimerization partner has not yet been found. This work uses knockouts and germ-line clones to examine interaction.... ........................................................................................ 13 Figure 4 Modern model of the molecular sex determination mechanism ............... 17 Figure 5 b-ZIP protein dimerization topology. ........................................................ 19 Figure 6 In-situ hybridization of Sis A...

  20. New insights into self-heating in double-gate transistors by solving Boltzmann transport equations

    SciTech Connect (OSTI)

    Thu Trang Nghiêm, T., E-mail: tthutrang.nghiem@gmail.com [Institute of Fundamental Electronics, UMR 8622, CNRS-University of Paris-Sud, Orsay (France); The Center for Thermal Sciences of Lyon, UMR 5008, CNRS–INSA–University of Lyon 1, Villeurbanne (France); Saint-Martin, J.; Dollfus, P. [Institute of Fundamental Electronics, UMR 8622, CNRS-University of Paris-Sud, Orsay (France)

    2014-08-21T23:59:59.000Z

    Electro-thermal effects become one of the most critical issues for continuing the downscaling of electron devices. To study this problem, a new efficient self-consistent electron-phonon transport model has been developed. Our model of phonon Boltzmann transport equation (pBTE) includes the decay of optical phonons into acoustic modes and a generation term given by electron-Monte Carlo simulation. The solution of pBTE uses an analytic phonon dispersion and the relaxation time approximation for acoustic and optical phonons. This coupled simulation is applied to investigate the self-heating effects in a 20?nm-long double gate MOSFET. The temperature profile per mode and the comparison between Fourier temperature and the effective temperature are discussed. Some significant differences occur mainly in the hot spot region. It is shown that under the influence of self-heating effects, the potential profile is modified and both the drain current and the electron ballisticity are reduced because of enhanced electron-phonon scattering rates.

  1. New insights of asteroid 4179 Toutatis using China Chang'e-2 close flyby optical measurements

    SciTech Connect (OSTI)

    Bu, Yanlong; Tang, Geshi; Cao, Jianfeng; Hu, Songjie; Yang, Cheng; Liu, Chuankai [Aerospace Flight Dynamics Laboratory, Beijing Aerospace Control Center, PO Box 5130, Beijing 100094 (China); Di, KaiChang; Xu, Bin; Liu, Bin [Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101 (China); Fa, Wenzhe [School of Earth and Space Sciences, Peking University, Peking 100871 (China); Hu, Tianjiang [College of Mechatronics and Automation, National University of Defense Technology, 410073 (China); Ding, Chibiao, E-mail: buyanlong@yahoo.com, E-mail: tanggeshi@bacc.org.cn [Institute of Electronics, Chinese Academy of Sciences, 100190 (China)

    2015-01-01T23:59:59.000Z

    The mysteries of near-Earth asteroid 4179 Toutatis have been more comprehensively unveiled by analyzing the optical images taken during the Chang'e-2 flyby in 2012. Compared with previous works, this paper concentrates on the photogrammetric relation between the Chang'e-2 spacecraft and Toutatis and the imaging shadow effect during the flyby. Accurate models of imaging and optical measurements are developed to study Toutatis's dimensions and rotational state at the time of imaging. As the illumination study shows, the shadowed region perpendicular to the long axis accounts for 27.78% of the Toutatis images, while the long axis of the body is fully captured. With a compensation on the shadow effect, the optical measurements reveal that Toutatis's long axis is 4354 ± 56 m, the maximum length is 4391 ± 56 m, and the spatial orientation described with the angles of direction cosine during the flyby is (126.°13 ± 0.°29, 122.°98 ± 0.°21, 126.°63 ± 0.°46). Furthermore, a new triaxial ellipsoid of 4354 × 1835 × 2216 m and a volume of 7.5158 km{sup 3} are proposed based on the previous Toutatis shape model. The effectiveness of the proposed method is validated, since typical features such as the neck and endpoints agree well with the results simultaneously observed by the ground radar. Moreover, it also potentially provides a feasible approach to precisely calculate the spin period of Toutatis.

  2. Human KZNF Gene Catalog - A comprehensive catalog of human KRAB-associated zinc finger genes: insights into the evolutionary history of a large family of transcriptional repressors

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

    Huntley, S; Baggott, D. M.; Hamilton, A. T.; Tran-Gyamfi, M.; Yang, S.; Kim, J.; Gordon, L.; Branscomb, E.; Stubbs, L.

    Kruppel-type zinc finger (ZNF) motifs are prevalent components of transcription factor proteins in all eukaryotes. KRAB-ZNF proteins, in which a potent repressor domain is attached to a tandem array of DNA-binding zinc-finger motifs, are specific to tetrapod vertebrates and represent the largest class of ZNF proteins in mammals. To define the full repertoire of human KRAB-ZNF proteins, we searched the genome sequence for key motifs and then constructed and manually curated gene models incorporating those sequences. The resulting gene catalog contains 423 KRAB-ZNF protein-coding loci, yielding alternative transcripts that altogether predict at least 742 structurally distinct proteins. Active rounds of segmental duplication, involving single genes or larger regions and including both tandem and distributed duplication events, have driven the expansion of this mammalian gene family. Comparisons between the human genes and ZNF loci mined from the draft mouse, dog, and chimpanzee genomes not only identified 103 KRAB-ZNF genes that are conserved in mammals but also highlighted a substantial level of lineage-specific change; at least 136 KRAB-ZNF coding genes are primate specific, including many recent duplicates. KRAB-ZNF genes are widely expressed and clustered genes are typically not coregulated, indicating that paralogs have evolved to fill roles in many different biological processes. To facilitate further study, we have developed a Web-based public resource with access to gene models, sequences, and other data, including visualization tools to provide genomic context and interaction with other public data sets. [This abstract was copied from: S Huntley, DM Baggott, AT Hamilton, M Tran-Gyamfi, S Yang, J Kim, L Gordon, E Branscomb, and L Stubbs. 2006. A comprehensive catalog of human KRAB-associated zinc finger genes: insights into the evolutionary history of a large family of transcriptional repressors, Genome Research 16(5):669 - 677] The website provides the ability to search the online catalog by genomic coordinates, name, locus type, and motifs, to utilize a graphical browser and to download data files.

  3. Insights into the crystal chemistry of Earth materials rendered by electron density distributions: Pauling's rules revisited

    SciTech Connect (OSTI)

    Gibbs, Gerald V.; Ross, Nancy L.; Cox, David F.; Rosso, Kevin M.

    2014-05-20T23:59:59.000Z

    Pauling's first two rules are examined in terms of the accumulation of the electron density between bonded pairs of atoms for a relatively large number of oxide and silicate crystals and siloxane molecules. The distribution of the electron density shows that the radius of the oxygen atom is not fixed, but that it actually decreases systematically from ~1.40 Å to ~ 0.65 Å as the polarizing power and the electronegativity of the bonded metal atoms increase and the distribution of the O atom is progressively polarized and contracted along the bond vectors by the impact of the bonded interactions. The contractions result in an aspherical oxygen atom that displays as many different bonded “radii” as it has bonded interactions. The bonded radii for the metal atoms match the Shannon and Prewitt ionic radii for the more electropositive atoms like potassium and sodium, but they are systematically larger for the more electronegative atoms like aluminum, silicon and phosphorous. Pauling's first rule is based on the assumption that the radius of the oxide anion is fixed and that the radii of the cations are such that radius sum of the spherical oxide anion and a cation necessarily equals the separation between the cation-anion bonded pair with the coordination number of the cation being determined by the ratio of the radii of the cation and anion. In the case of the bonded radii, the sum of the bonded radii for the metal atoms and the oxide anion necessarily equals the bond lengths by virtue of the way that the bonded radii were determined in the partitioning of the electron density along the bond path into metal and O atom parts. But, the radius ratio for the O and M atoms is an unsatisfactory rule for determining the coordination number of the metal atom inasmuch as a bonded O atom is not, in general, spherical, and its size varies substantially along its bonded directions. But by counting the number of bond paths that radiate from a bonded atom, the coordination number of the atom is determined uniquely independent of the asphericity and sizes of the atom. A power law connection established between the bond lengths and bond strengths for crystals and molecules is mirrored by a comparable power law connection between bond length and the accumulation of the electron density between bonded pairs of atoms, a connection that is consistent with Pauling's electroneutrality postulate that the charges of the atoms in an oxide are negligibly small. The connection indicates that a one-to-one correspondence exists between the accumulation between a pair of bonded atoms and the Pauling bond strength for M-O bonded interaction for all atoms of the periodic table. The connection provides a common basis for understanding the success of the manifold applications that have been made with the bond valence theory model together with the modeling of crystal structures, chemical zoning, leaching and cation transport in batteries and the like. We believe that the wide spread applications of the model in mineralogy and material science owes much of its success to the direct connection between bond strength and the quantum mechanical observable, the electron density distribution. Comparable power law expressions established for the bonded interactions for both crystals and molecules support Pauling's assertion that his second rule has significance for molecules as well as for crystals. A simple expression is found that provides a one to one connection between the accumulation of the electron density between bonded M and O atoms and the Pauling bond strength for all M atoms of the periodic table with ~ 95 % of the variation of the bond strength being explained in terms of a linear dependence on the accumulated electron density. Compelling evidence is presented that supports the argument that the Si-O bonded interactions for tiny siloxane molecules and silicate crystals are chemically equivalent.

  4. INteRNatIONal BuSINeSS BuSINeSS adMINIStRatION Students will gain critical insights into business operations

    E-Print Network [OSTI]

    Maxwell, Bruce D.

    MINORS INteRNatIONal BuSINeSS BuSINeSS adMINIStRatION Students will gain critical insights into business operations and strategy from accounting, finance, management and marketing coursework. The Business Administration Minor will provide students with fundamental knowledge and exposure to key business

  5. Sea ice loss and the changing atmospheric CO2 uptake capacity of the Arctic Ocean: Insights1 from the southeastern Canada Basin2

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Sea ice loss and the changing atmospheric CO2 uptake capacity of the Arctic Ocean: Insights1 from (Arctic Ocean) to act as an atmospheric CO2 sink under the summertime ice-free conditions12 expected in the near future. Beneath a heavily decayed ice cover, we found surprisingly high13 pCO2sw (~290-320 atm

  6. Syntheses and anti-MRSA activities of the C3 analogs of mansonone F, a potent anti-bacterial sesquiterpenoid: insights into

    E-Print Network [OSTI]

    Suh, Young-Ger

    Syntheses and anti-MRSA activities of the C3 analogs of mansonone F, a potent anti-bacterial sesquiterpenoid: insights into its structural requirements for anti-MRSA activity Dong-Yun Shin,a Sun Nam Kim June 2004 Available online 3 July 2004 Abstract--Syntheses and excellent anti-MRSA activities

  7. "In terms of the long-term outlook for biomass and biofuels, the largest proportion of Business Insights industry survey respondents

    E-Print Network [OSTI]

    "In terms of the long-term outlook for biomass and biofuels, the largest proportion of Business Insights industry survey respondents (47%) thought that biofuels would account for 5-10% of total global fuel production by 2017. A further 25% of respondents thought that biofuels would account for 2

  8. 8th International Conference on LCA in the Agri-Food Sector, Rennes, France, 2-4 October 2012 Life Cycle Assessment at the regional scale: innovative insights

    E-Print Network [OSTI]

    Boyer, Edmond

    in groundwater irrigated areas worldwide are manifold and the Life Cycle Assessment (LCA) is very relevant and decision making is carried out, Life Cycle Assessment (LCA) should be applied at regional scale, which Life Cycle Assessment at the regional scale: innovative insights based on the Systems Approach used

  9. Graphite grains in supernova ejecta Insights from a noble gas study of 91 individual KFC1 presolar graphite grains from the

    E-Print Network [OSTI]

    Graphite grains in supernova ejecta ­ Insights from a noble gas study of 91 individual KFC1 Zu¨rich, Switzerland b Lund University, Department of Geology, So¨lvegatan 12, SE-22362 Lund, Sweden Museum of Natural History, 1400 South Lake Shore Drive, Chicago, IL 60605-2496, USA d Chicago Center

  10. Environment and climate of the last 51,000 years e new insights from the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO)

    E-Print Network [OSTI]

    Long, Bernard

    Environment and climate of the last 51,000 years e new insights from the Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO) B. Zolitschka a,*, F. Anselmetti b , D. Ariztegui c , H-M, D-28359 Bremen, Germany b Eawag, Swiss Federal Institute of Aquatic Science and Technology

  11. Improving water quality with a "territorial" agri-environmental policy? Insights from the new generation AES in South-West France

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Improving water quality with a "territorial" agri-environmental policy? Insights from the new with the Local Agri-Environmental Schemes (LAES), the French contractual policy instrument within the European underlie the French agri-environmental policy, from a retrospective of the successive national schemes set

  12. Project Profile: Physics-Based Reliability Models for Supercritical-CO2 Turbomachinery Components

    Broader source: Energy.gov [DOE]

    GE, under the Physics of Reliability: Evaluating Design Insights for Component Technologies in Solar (PREDICTS) Program will be leveraging internally developed models to predict the reliability of hybrid gas bearing (HGB) and dry gas seal (DGS) components in the turboexpander of a supercritical CO2 turbine. The Bayesian model is to include phase changes, low cycle fatigue/high cycle fatigue, dynamic instabilities, and corrosion processes.

  13. The Origin and Kinematics of Cold Gas in Galactic Winds: Insight from Numerical Simulations

    E-Print Network [OSTI]

    Fujita, Akimi; Mac Low, Mordecai-Mark; New, Kimberly C B; Weaver, Robert

    2008-01-01T23:59:59.000Z

    We study the origin of Na I absorbing gas in ultraluminous infrared galaxies motivated by the recent observations by Martin of extremely superthermal linewidths in this cool gas. We model the effects of repeated supernova explosions driving supershells in the central regions of molecular disks with M_d=10^{10} M_{\\odot}, using cylindrically symmetric gas dynamical simulations run with ZEUS-3D. The shocked swept-up shells quickly cool and fragment by Rayleigh-Taylor instability as they accelerate out of the dense, stratified disks. The numerical resolution of the cooling and compression at the shock fronts determines the peak shell density, and so the speed of Rayleigh-Taylor fragmentation. We identify cooled shells and shell fragments as Na I absorbing gas and study its kinematics along various sightlines across the grid. We find that simulations with a numerical resolution of \\le 0.2 pc produce multiple Rayleigh-Taylor fragmented shells in a given line of sight that appear to explain the observed kinematics....

  14. Structural insight into recruitment of translesion DNA polymerase Dpo4 to sliding clamp PCNA

    SciTech Connect (OSTI)

    Xing, G.; Kirouac, K.; Shin, Y.J.; Bell, S.D.; Ling, H.; (UWO); (Sir W.Dunn)

    2009-09-16T23:59:59.000Z

    DNA polymerases are co-ordinated by sliding clamps (PCNA/{beta}-clamp) in translesion synthesis. It is unclear how these enzymes assemble on PCNA with geometric and functional compatibility. We report the crystal structure of a full-length Y-family polymerase, Dpo4, in complex with heterodimeric PCNA1-PCNA2 at 2.05 {angstrom} resolution. Dpo4 exhibits an extended conformation that differs from the Dpo4 structures in apo- or DNA-bound form. Two hinges have been identified in Dpo4, which render the multidomain polymerase flexible conformations and orientations relative to PCNA. Dpo4 binds specifically to PCNA1 on the conserved ligand binding site. The C-terminal peptide of Dpo4 becomes structured with a 3{sub 10} helix and dominates the specific binding. The Y-family polymerase also contacts PCNA1 with its finger, thumb and little finger domains, which are conformation-dependent protein-protein interactions that diversify the binding mode of Dpo4 on PCNA. The structure reveals a molecular model in which substrate/partner binding-coupled multiple conformations of a Y-family polymerase facilitate its recruitment and co-ordination on the sliding clamp. The conformational flexibility would turn the error-prone Y-family polymerase off when more efficient high-fidelity DNA polymerases work on undamaged DNA and turn it onto DNA templates to perform translesion synthesis when replication forks are stalled by DNA lesions.

  15. Insights into the behavior of nuclear power plant containments during severe accidents

    SciTech Connect (OSTI)

    Horschel, D.S.; Ludwigsen, J.S.; Parks, M.B.; Lambert, L.D. [Sandia National Labs., Albuquerque, NM (United States); Dameron, R.A.; Rashid, Y.R. [ANATECH Research Corp., San Diego, CA (United States)

    1993-06-01T23:59:59.000Z

    The containment building surrounding a nuclear reactor offers the last barrier to the release of radioactive materials from a severe accident into the environment. The loading environment of the containment under severe accident conditions may include much greater than design pressures and temperatures. Investigations into the performance of containments subject to ultimate or failure pressure and temperature conditions have been performed over the last several years through a program administered by the Nuclear Regulatory Commission (NRC). These NRC sponsored investigations are subsequently discussed. Reviewed are the results of large scale experiments on reinforced concrete, prestressed concrete, and steel containment models pressurized to failure. In conjunction with these major tests, the results of separate effect testing on many of the critical containment components; that is, aged and unaged seals, a personnel air lock and electrical penetration assemblies subjected to elevated temperature and pressure have been performed. An objective of the NRC program is to gain an understanding of the behavior of typical existing and planned containment designs subject to postulated severe accident conditions. This understanding has led to the development of experimentally verified analytical tools that can be applied to accurately predict their ultimate capacities useful in developing severe accident mitigation schemes. Finally, speculation on the response of containments subjected to severe accident conditions is presented.

  16. Insights into the particle acceleration of a peculiar gamma -ray radio galaxy IC 310

    E-Print Network [OSTI]

    Sitarek, J; Mannheim, K; Colin, P; Kadler, M; Schultz, R; Krauß, F; Ros, E; Bach, U; Wilms, J

    2015-01-01T23:59:59.000Z

    IC 310 has recently been identified as a gamma-ray emitter based on observations at GeV energies with Fermi-LAT and at very high energies (VHE, E > 100 GeV) with the MAGIC telescopes. Despite IC 310 having been classified as a radio galaxy with the jet observed at an angle > 10 degrees, it exhibits a mixture of multiwavelength properties of a radio galaxy and a blazar, possibly making it a transitional object. On the night of 12/13th of November 2012 the MAGIC telescopes observed a series of violent outbursts from the direction of IC 310 with flux-doubling time scales faster than 5 min and a peculiar spectrum spreading over 2 orders of magnitude. Such fast variability constrains the size of the emission region to be smaller than 20% of the gravitational radius of its central black hole, challenging the shock acceleration models, commonly used in explanation of gamma-ray radiation from active galaxies. Here we will show that this emission can be associated with pulsar-like particle acceleration by the electric...

  17. Queuing models System dynamics models

    E-Print Network [OSTI]

    Glushko, Robert J.

    models Value chain models Business Model / Organizational Perspective Process Perspective Information#12;#12;#12;#12;Queuing models System dynamics models #12;#12;#12;#12;Blueprint or touchpoint

  18. The Origin and Kinematics of Cold Gas in Galactic Winds: Insight from Numerical Simulations

    E-Print Network [OSTI]

    Akimi Fujita; Crystal L. Martin; Mordecai-Mark Mac Low; Kimberly C. B. New; Robert Weaver

    2009-04-02T23:59:59.000Z

    We study the origin of Na I absorbing gas in ultraluminous infrared galaxies motivated by the recent observations by Martin of extremely superthermal linewidths in this cool gas. We model the effects of repeated supernova explosions driving supershells in the central regions of molecular disks with M_d=10^10 M_\\sun, using cylindrically symmetric gas dynamical simulations run with ZEUS-3D. The shocked swept-up shells quickly cool and fragment by Rayleigh-Taylor instability as they accelerate out of the dense, stratified disks. The numerical resolution of the cooling and compression at the shock fronts determines the peak shell density, and so the speed of Rayleigh-Taylor fragmentation. We identify cooled shells and shell fragments as Na I absorbing gas and study its kinematics. We find that simulations with a numerical resolution of \\le 0.2 pc produce multiple Rayleigh-Taylor fragmented shells in a given line of sight. We suggest that the observed wide Na I absorption lines, = 320 \\pm 120 km s^-1 are produced by these multiple fragmented shells traveling at different velocities. We also suggest that some shell fragments can be accelerated above the observed average terminal velocity of 750 km s^-1 by the same energy-driven wind with an instantaneous starburst of \\sim 10^9 M_\\sun. The bulk of mass is traveling with the observed average shell velocity 330 \\pm 100 km s^-1. Our results show that an energy-driven bubble causing Rayleigh-Taylor instabilities can explain the kinematics of cool gas seen in the Na I observations without invoking additional physics relying primarily on momentum conservation, such as entrainment of gas by Kelvin-Helmholtz instabilities, ram pressure driving of cold clouds by a hot wind, or radiation pressure acting on dust. (abridged)

  19. Modeling of scalar dissipation rates in flamelet models for low temperature combustion engine simulations

    E-Print Network [OSTI]

    Gupta, Saurabh; Pal, Pinaki; Im, Hong G

    2014-01-01T23:59:59.000Z

    The flamelet approach offers a viable framework for combustion modeling of homogeneous charge compression ignition (HCCI) engines under stratified mixture conditions. Scalar dissipation rate acts as a key parameter in flamelet-based combustion models which connects the physical mixing space to the reactive space. The aim of this paper is to gain fundamental insights into turbulent mixing in low temperature combustion (LTC) engines and investigate the modeling of scalar dissipation rate. Three direct numerical simulation (DNS) test cases of two-dimensional turbulent auto-ignition of a hydrogen-air mixture with different correlations of temperature and mixture fraction are considered, which are representative of different ignition regimes. The existing models of mean and conditional scalar dissipation rates, and probability density functions (PDFs) of mixture fraction and total enthalpy are a priori validated against the DNS data.

  20. Model Evaluation and Hindcasting: An Experiment with an Integrated Assessment Model

    SciTech Connect (OSTI)

    Chaturvedi, Vaibhav; Kim, Son H.; Smith, Steven J.; Clarke, Leon E.; Zhou, Yuyu; Kyle, G. Page; Patel, Pralit L.

    2013-11-01T23:59:59.000Z

    Integrated assessment models have been extensively used for analyzing long term energy and greenhouse emissions trajectories and have influenced key policies on this subject. Though admittedly these models are focused on the long term trajectories, how well these models are able to capture historical dynamics is an open question. In a first experiment of its kind, we present a framework for evaluation of such integrated assessment models. We use Global Change Assessment Model for this zero order experiment, and focus on the building sector results for USA. We calibrate the model for 1990 and run it forward up to 2095 in five year time steps. This gives us results for 1995, 2000, 2005 and 2010 which we compare to observed historical data at both fuel level and service level. We focus on bringing out the key insights for the wider process of model evaluation through our experiment with GCAM. We begin with highlighting that creation of an evaluation dataset and identification of key evaluation metric is the foremost challenge in the evaluation process. Our analysis highlights that estimation of functional form of the relationship between energy service demand, which is an unobserved variable, and its drivers is a significant challenge in the absence of adequate historical data for both the dependent and driver variables. Historical data availability for key metrics is a serious limiting factor in the process of evaluation. Interestingly, service level data against which such models need to be evaluated are itself a result of models. Thus for energy services, the best we can do is compare our model results with other model results rather than observed and measured data. We show that long term models, by the nature of their construction, will most likely underestimate the rapid growth in some services observed in a short time span. Also, we learn that modeling saturated energy services like space heating is easier than modeling unsaturated services like space cooling and understanding that how far a service is from its saturation level is a key question which we probably don’t have an answer to. Finally and most importantly, even if long term models partially miss the short term dynamics, the long term insights provides by these models is fairly robust. We conclude by highlighting that our work is the first step in the much wider process of integrated assessment model evaluation and will hence have its own limitations. Future evaluation research work should build upon this zero order experiment for improving our modeling of human and coupled earth systems.

  1. New insight into the properties of proton conducting oxides from neutron total scattering

    SciTech Connect (OSTI)

    Proffen, Thomas E [Los Alamos National Laboratory; Kim, Hyunjeong [Los Alamos National Laboratory; Malavasi, Lorenzo [U PAVIA, ITALY; Flor, Giorgio [U PAVIA, ITALY

    2008-01-01T23:59:59.000Z

    In recent years there has been a growing interest in searching for new proton conducting materials that could be successfully used in medium temperature solid oxide fuel cells (SOFC). In particular, proton conducting oxides have been the subject of a massive research activity. Among the most promising oxide the acceptor doped cerates appears to be those most appealing in view of practical applications. A relevant aspect of these materials is the investigation of the local distortion of the structure arising from water incorporation. This kind of study is of great help in defining how the structure changes in order to accommodate the proton which is usually thought to enter the structure in form of hydroxyl group where the oxygen vacancy results from the acceptor doping on the Ce site. Atomistic simulation work confirmed that the preferential location of dopant ions is on the Ce site. To the best of our knowledge the only experimental work addressing the role of dopant and water incorporation on the local structure of V-doped cerates is a X-ray absorption spectroscopy (XAS) work carried out by Longo and coworkers at the Y K-edge. The main conclusion of that work was the observation that Y-doping induces a distortion of the parent BaCe0{sub 3} structure resulting in a significantly distorted Y local environment. However, local structure information derived from XAS study does not provide a direct structural information and depends strongly upon the model used to calcualte theoretical {chi}(k) which is not unique. Moreover, the XAS analysis usually provide significant information only up to the second shell. As a consequence, a more reliable and useful technique to investigate the local arrangement in these proton conducting oxides appears to be the Pair Distribution Function (PDF) analysis derived from total neutron scattering measurements. In the present work we investigated the pure BaCeO{sub 3} and the acceptor doped BaCe{sub 0.90}Y{sub 0.10}O{sub 2.85} compounds. In both cases the samples have been measured at room temperature and after being exposed to dry and wet air (humidification attained through bubbling air in D{sub 2}O). Aim of this work is to look at the effect of Y-doping and water doping on the local structure of the above mentioned samples.

  2. Insights into Silicate Carbonation Processes in Water-Bearing Supercritical CO2 Fluids

    SciTech Connect (OSTI)

    Miller, Quin RS; Thompson, Christopher J.; Loring, John S.; Windisch, Charles F.; Bowden, Mark E.; Hoyt, David W.; Hu, Jian Z.; Arey, Bruce W.; Rosso, Kevin M.; Schaef, Herbert T.

    2013-07-01T23:59:59.000Z

    Long-term geologic storage of carbon dioxide (CO2) is considered an integral part to moderating CO2 concentrations in the atmosphere and subsequently minimizing effects of global climate change. Although subsurface injection of CO2 is common place in certain industries, deployment at the scale required for emission reduction is unprecedented and therefore requires a high degree of predictability. Accurately modeling geochemical processes in the subsurface requires experimental derived data for mineral reactions occurring between the CO2, water, and rocks. Most work in this area has focused on aqueous-dominated systems in which dissolved CO2 reacts to form crystalline carbonate minerals. Comparatively little laboratory research has been conducted on reactions occurring between minerals in the host rock and the wet supercritical fluid phase. In this work, we studied the carbonation of wollastonite [CaSiO3] exposed to variably hydrated supercritical CO2 (scCO2) at a range of temperatures (50, 55 and 70 °C) and pressures (90,120 and 160 bar) that simulate conditions in geologic repositories. Mineral transformation reactions were followed by three novel in situ high pressure techniques, including x-ray diffraction that tracked the rate and extents of wollastonite conversion to calcite. Increased dissolved water concentrations in the supercritical CO2 resulted in increased silicate carbonation approaching ~50 wt. %. Development of thin water films on the mineral surface were directly observed with infrared spectroscopy and determined to be critical for facilitating carbonation processes. Even in extreme low water conditions, magic angle spinning nuclear magnetic resonance detected formation of Q3 [Si(OSi)3OH] and Q4 [Si(OSi)4] amorphous silica species. Unlike the thick (<10 ?m) passivating silica layers observed in the fully water saturated scCO2 experiments, images obtained from a focused ion beam sectioned sample indicted these coatings were chemically wollastonite but structurally amorphous. In addition, evidence of an intermediate hydrated amorphous calcium carbonate forming under these conditions further emphasize the importance of understanding geochemical processes occurring in water bearing scCO2 fluids.

  3. An analysis of oil supply disruption scenarios

    E-Print Network [OSTI]

    Mork, Knut Anton

    1981-01-01T23:59:59.000Z

    This report brings the results of simulations of some oil supply disruptions on the M.I.T. Energy Laboratory Energy Macro Model. This model has previously been used to study the macroeconomic effects of the 1973-74 and ...

  4. Model documentation report: Commercial Sector Demand Module of the National Energy Modeling System

    SciTech Connect (OSTI)

    NONE

    1998-01-01T23:59:59.000Z

    This report documents the objectives, analytical approach and development of the National Energy Modeling System (NEMS) Commercial Sector Demand Module. The report catalogues and describes the model assumptions, computational methodology, parameter estimation techniques, model source code, and forecast results generated through the synthesis and scenario development based on these components. The NEMS Commercial Sector Demand Module is a simulation tool based upon economic and engineering relationships that models commercial sector energy demands at the nine Census Division level of detail for eleven distinct categories of commercial buildings. Commercial equipment selections are performed for the major fuels of electricity, natural gas, and distillate fuel, for the major services of space heating, space cooling, water heating, ventilation, cooking, refrigeration, and lighting. The algorithm also models demand for the minor fuels of residual oil, liquefied petroleum gas, steam coal, motor gasoline, and kerosene, the renewable fuel sources of wood and municipal solid waste, and the minor services of office equipment. Section 2 of this report discusses the purpose of the model, detailing its objectives, primary input and output quantities, and the relationship of the Commercial Module to the other modules of the NEMS system. Section 3 of the report describes the rationale behind the model design, providing insights into further assumptions utilized in the model development process to this point. Section 3 also reviews alternative commercial sector modeling methodologies drawn from existing literature, providing a comparison to the chosen approach. Section 4 details the model structure, using graphics and text to illustrate model flows and key computations.

  5. Nuclear Safety Design Principles & the Concept of Independence: Insights from Nuclear Weapon Safety for Other High-Consequence Applications.

    SciTech Connect (OSTI)

    Brewer, Jeffrey D.

    2014-05-01T23:59:59.000Z

    Insights developed within the U.S. nuclear weapon system safety community may benefit system safety design, assessment, and management activities in other high consequence domains. The approach of assured nuclear weapon safety has been developed that uses the Nuclear Safety Design Principles (NSDPs) of incompatibility, isolation, and inoperability to design safety features, organized into subsystems such that each subsystem contributes to safe system responses in independent and predictable ways given a wide range of environmental contexts. The central aim of the approach is to provide a robust technical basis for asserting that a system can meet quantitative safety requirements in the widest context of possible adverse or accident environments, while using the most concise arrangement of safety design features and the fewest number of specific adverse or accident environment assumptions. Rigor in understanding and applying the concept of independence is crucial for the success of the approach. This paper provides a basic description of the assured nuclear weapon safety approach, in a manner that illustrates potential application to other domains. There is also a strong emphasis on describing the process for developing a defensible technical basis for the independence assertions between integrated safety subsystems.

  6. Risk perception & strategic decision making :general insights, a framework, and specific application to electricity generation using nuclear energy.

    SciTech Connect (OSTI)

    Brewer, Jeffrey D.

    2005-11-01T23:59:59.000Z

    The objective of this report is to promote increased understanding of decision making processes and hopefully to enable improved decision making regarding high-consequence, highly sophisticated technological systems. This report brings together insights regarding risk perception and decision making across domains ranging from nuclear power technology safety, cognitive psychology, economics, science education, public policy, and neural science (to name a few). It forms them into a unique, coherent, concise framework, and list of strategies to aid in decision making. It is suggested that all decision makers, whether ordinary citizens, academics, or political leaders, ought to cultivate their abilities to separate the wheat from the chaff in these types of decision making instances. The wheat includes proper data sources and helpful human decision making heuristics; these should be sought. The chaff includes ''unhelpful biases'' that hinder proper interpretation of available data and lead people unwittingly toward inappropriate decision making ''strategies''; obviously, these should be avoided. It is further proposed that successfully accomplishing the wheat vs. chaff separation is very difficult, yet tenable. This report hopes to expose and facilitate navigation away from decision-making traps which often ensnare the unwary. Furthermore, it is emphasized that one's personal decision making biases can be examined, and tools can be provided allowing better means to generate, evaluate, and select among decision options. Many examples in this report are tailored to the energy domain (esp. nuclear power for electricity generation). The decision making framework and approach presented here are applicable to any high-consequence, highly sophisticated technological system.

  7. Cross-study and cross-omics comparisons of three nephrotoxic compounds reveal mechanistic insights and new candidate biomarkers

    SciTech Connect (OSTI)

    Matheis, Katja A., E-mail: katja.matheis@boehringer-ingelheim.com [Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach an der Riss (Germany); Com, Emmanuelle [Sanofi-Aventis, Paris (France); High-Throughput Proteomics Core Facility OUEST-genopole (registered) , Rennes (France); Gautier, Jean-Charles [Sanofi-Aventis, Paris (France); Guerreiro, Nelson [Novartis Institutes for BioMedical Research (NIBR), Basel (Switzerland); Brandenburg, Arnd; Gmuender, Hans [GeneData AG, Basel (Switzerland); Sposny, Alexandra; Hewitt, Philip [Merck KGaA, Darmstadt (Germany); Amberg, Alexander [Sanofi-Aventis, Frankfurt (Germany); Boernsen, Olaf [Novartis Institutes for BioMedical Research (NIBR), Basel (Switzerland); Riefke, Bjoern [Bayer Schering Pharma AG, Berlin (Germany); Hoffmann, Dana; Mally, Angela [Department of Toxicology, University of Wuerzburg, Wuerzburg (Germany); Kalkuhl, Arno [Boehringer Ingelheim Pharma GmbH and Co. KG, Biberach an der Riss (Germany); Suter, Laura [F. Hoffmann-La Roche, Ltd., Basel (Switzerland); Dieterle, Frank; Staedtler, Frank [Novartis Institutes for BioMedical Research (NIBR), Basel (Switzerland)

    2011-04-15T23:59:59.000Z

    The European InnoMed-PredTox project was a collaborative effort between 15 pharmaceutical companies, 2 small and mid-sized enterprises, and 3 universities with the goal of delivering deeper insights into the molecular mechanisms of kidney and liver toxicity and to identify mechanism-linked diagnostic or prognostic safety biomarker candidates by combining conventional toxicological parameters with 'omics' data. Mechanistic toxicity studies with 16 different compounds, 2 dose levels, and 3 time points were performed in male Crl: WI(Han) rats. Three of the 16 investigated compounds, BI-3 (FP007SE), Gentamicin (FP009SF), and IMM125 (FP013NO), induced kidney proximal tubule damage (PTD). In addition to histopathology and clinical chemistry, transcriptomics microarray and proteomics 2D-DIGE analysis were performed. Data from the three PTD studies were combined for a cross-study and cross-omics meta-analysis of the target organ. The mechanistic interpretation of kidney PTD-associated deregulated transcripts revealed, in addition to previously described kidney damage transcript biomarkers such as KIM-1, CLU and TIMP-1, a number of additional deregulated pathways congruent with histopathology observations on a single animal basis, including a specific effect on the complement system. The identification of new, more specific biomarker candidates for PTD was most successful when transcriptomics data were used. Combining transcriptomics data with proteomics data added extra value.

  8. The NMDA Receptor NR1 C1 Region Bound to Calmodulin: Structural Insights into Functional Differences between Homologous Domains

    SciTech Connect (OSTI)

    Ataman, Zeynep Akyol; Gakhar, Lokesh; Sorensen, Brenda R.; Hell, Johannes W.; Shea, Madeline A. (Iowa)

    2008-09-17T23:59:59.000Z

    Calmodulin (CaM) regulates tetrameric N-methyl-D-aspartate receptors (NMDARs) by binding tightly to the C0 and C1 regions of its NR1 subunit. A crystal structure (2HQW; 1.96 {angstrom}) of calcium-saturated CaM bound to NR1C1 (peptide spanning 875-898) showed that NR1 S890, whose phosphorylation regulates membrane localization, was solvent protected, whereas the endoplasmic reticulum retention motif was solvent exposed. NR1 F880 filled the CaM C-domain pocket, whereas T886 was closest to the N-domain pocket. This 1-7 pattern was most similar to that in the CaM-MARCKS complex. Comparison of CaM-ligand wrap-around conformations identified a core tetrad of CaM C-domain residues (FLMM{sub C}) that contacted all ligands consistently. An identical tetrad of N-domain residues (FLMM{sub N}) made variable sets of contacts with ligands. This CaM-NR1C1 structure provides a foundation for designing mutants to test the role of CaM in NR1 trafficking as well as insights into how the homologous CaM domains have different roles in molecular recognition.

  9. Insights into Hsp70 Chaperone Activity from a Crystal Structure of the Yeast Hsp110 Sse1

    SciTech Connect (OSTI)

    Liu,Q.; Hendrickson, W.

    2007-01-01T23:59:59.000Z

    Classic Hsp70 chaperones assist in diverse processes of protein folding and translocation, and Hsp110s had seemed by sequence to be distant relatives within an Hsp70 superfamily. The 2.4 Angstroms resolution structure of Sse1 with ATP shows that Hsp110s are indeed Hsp70 relatives, and it provides insight into allosteric coupling between sites for ATP and polypeptide-substrate binding in Hsp70s. Subdomain structures are similar in intact Sse1(ATP) and in the separate Hsp70 domains, but conformational dispositions are radically different. Interfaces between Sse1 domains are extensive, intimate, and conservative in sequence with Hsp70s. We propose that Sse1(ATP) may be an evolutionary vestige of the Hsp70(ATP) state, and an analysis of 64 mutant variants in Sse1 and three Hsp70 homologs supports this hypothesis. An atomic-level understanding of Hsp70 communication between ATP and substrate-binding domains follows. Requirements on Sse1 for yeast viability are in keeping with the distinct function of Hsp110s as nucleotide exchange factors.

  10. Experimental Verification of a Cracked Fuel Mechanical Model

    SciTech Connect (OSTI)

    Williford, R. E.

    1982-12-01T23:59:59.000Z

    This report describes the results of a series of laboratory experiments conducted to independently verify a model that describes the nonlinear mechanical behavior of cracked fuel in pelletized UO{sub 2}/Zircaloy nuclear fuel rods under normal operating conditions. After a brief description of the analytical model, each experiment is discussed in detail. Experiments were conducted to verify the general behavior and numerical values for the three primary independent modelling parameters (effective crack roughness, effective gap roughness, and total crack length), and to verify the model predictions that the effective Young's moduli for cracked fuel systems were substantially less than those for solid UO{sub 2} pellets. In general, the model parameters and predictions were confirmed, and new insight was gained concerning the complexities of cracked fuel mechanics.

  11. Cosmological Insights from Supernovae

    E-Print Network [OSTI]

    P. Ruiz-Lapuente

    1998-10-26T23:59:59.000Z

    While low-z Type Ia supernovae are used to measure the present rate of expansion of the Universe, high-z Type Ia measure its variation due to the cosmic matter-energy content. Results from those determinations imply a low matter density Universe with a non-zero cosmological constant (vacuum-energy component). The expansion rate of the Universe accelerates, according to these determinations. The validity of the Type Ia supernova approach for this cosmological research is addressed. An account is given of additional prospects to further investigate through supernovae what the Universe is made of. Those attempts range from constraining the large scale dark matter distribution to further test and interpret the presence of a vacuum energy component.

  12. Global Insight Energy Group

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto17 3400, U.S.MajorMarketsNov-14 Dec-14 Jan-15Gas Reserve Class

  13. Modeling Power System Operation with Intermittent Resources

    SciTech Connect (OSTI)

    Marinovici, Maria C.; Kirkham, Harold; Glass, Kevin A.; Carlsen, Leif C.

    2013-02-27T23:59:59.000Z

    Electricity generating companies and power system operators face the need to minimize total fuel cost or maximize total profit over a given time period. These issues become optimization problems subject to a large number of constraints that must be satisfied simultaneously. The grid updates due to smart-grid technologies plus the penetration of intermittent re- sources in electrical grid introduce additional complexity to the optimization problem. The Renewable Integration Model (RIM) is a computer model of interconnected power system. It is intended to provide insight and advice on complex power systems management, as well as answers to integration of renewable energy questions. This paper describes RIM basic design concept, solution method, and the initial suite of modules that it supports.

  14. Modelling piloted ignition of wood and plastics

    SciTech Connect (OSTI)

    Blijderveen, Maarten van [TNO, Schoemakerstraat 97, 2628 VK Delft (Netherlands); University of Twente, Department of Thermal Engineering, Drienerlolaan 5, 7522 NB Enschede (Netherlands); Bramer, Eddy A. [University of Twente, Department of Thermal Engineering, Drienerlolaan 5, 7522 NB Enschede (Netherlands); Brem, Gerrit, E-mail: g.brem@utwente.nl [University of Twente, Department of Thermal Engineering, Drienerlolaan 5, 7522 NB Enschede (Netherlands)

    2012-09-15T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer We model piloted ignition times of wood and plastics. Black-Right-Pointing-Pointer The model is applied on a packed bed. Black-Right-Pointing-Pointer When the air flow is above a critical level, no ignition can take place. - Abstract: To gain insight in the startup of an incinerator, this article deals with piloted ignition. A newly developed model is described to predict the piloted ignition times of wood, PMMA and PVC. The model is based on the lower flammability limit and the adiabatic flame temperature at this limit. The incoming radiative heat flux, sample thickness and moisture content are some of the used variables. Not only the ignition time can be calculated with the model, but also the mass flux and surface temperature at ignition. The ignition times for softwoods and PMMA are mainly under-predicted. For hardwoods and PVC the predicted ignition times agree well with experimental results. Due to a significant scatter in the experimental data the mass flux and surface temperature calculated with the model are hard to validate. The model is applied on the startup of a municipal waste incineration plant. For this process a maximum allowable primary air flow is derived. When the primary air flow is above this maximum air flow, no ignition can be obtained.

  15. Proceedings of the workshop on geochemical modeling

    SciTech Connect (OSTI)

    Not Available

    1986-01-01T23:59:59.000Z

    The following collection of papers was presented at a workshop on geochemical modeling that was sponsored by the Office of Civilian Radioactive Waste Management Program at the Lawrence Livermore National Laboratory (LLNL). The LLNL Waste Management Program sponsored this conference based on their belief that geochemical modeling is particularly important to the radioactive waste disposal project because of the need to predict the consequences of long-term water-rock interactions at the proposed repository site. The papers included in this volume represent a subset of the papers presented at the Fallen Leaf Lake Conference and cover a broad spectrum of detail and breadth in a subject that reflects the diverse research interests of the conference participants. These papers provide an insightful look into the current status of geochemical modeling and illustrate how various geochemical modeling codes have been applied to problems of geochemical interest. The emphasis of these papers includes traditional geochemical modeling studies of individual geochemical systems, the mathematical and theoretical development and refinement of new modeling capabilities, and enhancements of data bases on which the computations are based. The papers in this proceedings volume have been organized into the following four areas: Geochemical Model Development, Hydrothermal and Geothermal Systems, Sedimentary and Low Temperature Environments, and Data Base Development. The participants of this symposium and a complete list of the talks presented are listed in the appendices.

  16. Introduction Literature Review Supply Chain Network Model Simulation Studies Managerial Insights and Conclusions Supply Chain Outsourcing Under Exchange Rate Risk and

    E-Print Network [OSTI]

    Nagurney, Anna

    generally reduces production costs. From 2000 to 2007, 70 percent of U.S. non-oil import growth was driven Foreign exchange risk is consistently considered to be on the list of top concerns of supply chain executives. A study conducted by The Economist, which surveyed 500 global company executives

  17. Gravity modeling of the Song Hong basin: an insight into its crustal structure and implication for the formation of the basin 

    E-Print Network [OSTI]

    Nguyen, Vu Giang

    1996-01-01T23:59:59.000Z

    measurements 18 105' 106' 107 108 109 110' 22' 0. C INA 22' 21 21' 20 ETN M 19 18 O -20 O . '~0 0- HAINAM 19' 18' 17 LAO 17 16 16 15 106 107' 108 109' 110' 15' Figure 8: Bouguer gravity anomaly onland and free air anomaly at sea map...' Ao 16 15 0 4, ~ o I Qoo 1O5' 1O6' 107' 108' 109 110 16 15' Figure 9: Topography of the Song Hong basin area. Contour interval 10 m for the water depth at sea and 200m for the topography on land (ETOPO 5). Water depth is used in terrain...

  18. Motor Neuron-Specific Restoration of SMN in Two SMA Mouse Models: Insights into the Role of Motor Neurons in Spinal Muscular Atrophy

    E-Print Network [OSTI]

    Paez, Ximena

    2014-06-02T23:59:59.000Z

    . The intronic splicing silencer (N1 ISS-N1, discovered by Singh et al. 2006) is the main checkpoint of SMN2 exon 7 splicing regulation. Once ISS-N1 is deleted exon 7 is included. Anti-N1 treatment was capable of elevating SMN levels in type I SMA patient...

  19. Dynamics of P-binding forms in sediments of a mesotrophic hard-water lake: Insights from non-steady state reactive-transport modeling,

    E-Print Network [OSTI]

    Arhonditsis, George B.

    Gudimov 1 , George Arhonditsis, Alexey Chesnyuk, Maria Dittrich Department of Physical and Environmental r t i c l e i n f o Article history: Received 6 November 2012 Received in revised form 10 June 2013 the fractionation data of phosphorus binding forms. The impact of the interplay between sedi- mentation fluxes

  20. New insight into the ZnO sulfidation reaction:mechanism and kinetics modeling of the ZnS outward growth

    E-Print Network [OSTI]

    Boyer, Edmond

    are commonly used for the final desulfurization of synthesis gas in Fischer­Tropsch based XTL processes, Fischer­Tropsch based XTL processes (X = Biomass, Coal, or Gas) comprise a first step of feed gasification at reaching the required specifications,2,3 the syngas undergoes the Fischer­Tropsch reaction in order

  1. Sources and production of organic aerosol in Mexico City: insights from the combination of a chemical transport model (PMCAMx-2008) and measurements

    E-Print Network [OSTI]

    Tsimpidi, A. P.

    Urban areas are large sources of organic aerosols and their precursors. Nevertheless, the contributions of primary (POA) and secondary organic aerosol (SOA) to the observed particulate matter levels have been difficult to ...

  2. Induced technical change and the cost of climate policy

    E-Print Network [OSTI]

    Sue Wing, Ian.

    This paper investigates the potential for a carbon tax to induce R&D, and for the consequent induced technical change (ITC) to lower the macroeconomic cost of abating carbon emissions. ITC is modelled within a general ...

  3. Essays on Broad Divisia Monetary Aggregates: Admissibility and Practice

    E-Print Network [OSTI]

    Mattson, Ryan Scott

    2013-08-31T23:59:59.000Z

    The assumption of weak separability of goods and services in the utility function is ubiquitous in macroeconomic modeling. If the goods and services are weakly separable, they can be combined into an "admissible" aggregate. ...

  4. A Self-Consistent Method to Assess Air Quality Co-Benefits from US Climate Policies

    E-Print Network [OSTI]

    Saari, R.

    Air quality co-benefits can potentially reduce the costs of greenhouse gas mitigation. However, while many studies of the cost of greenhouse gas mitigation model the full macroeconomic welfare impacts, most studies of air ...

  5. Lifecycle Model

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-05-21T23:59:59.000Z

    This chapter describes the lifecycle model used for the Departmental software engineering methodology.

  6. Diode laser welding of ABS: Experiments and process modeling

    E-Print Network [OSTI]

    Ilie, Mariana; Mattei, Simone; Cicala, Eugen; Stoica, Virgil; 10.1016/j.optlastec.2008.10.005

    2010-01-01T23:59:59.000Z

    The laser beam weldability of acrylonitrile/butadiene/styrene (ABS) plates is determined by combining both experimental and theoretical aspects. In modeling the process, an optical model is used to determine how the laser beam is attenuated by the first material and to obtain the laser beam profile at the interface. Using this information as the input data to a thermal model, the evolution of the temperature field within the two components can be estimated. The thermal model is based on the first principles of heat transfer and utilizes the temperature variation laws of material properties. Corroborating the numerical results with the experimental results, some important insights concerning the fundamental phenomena that govern the process could be extracted. This approach proved to be an efficient tool in determining the weldability of polimeric materials and assures a significant reduction of time and costs with the experimental exploration.

  7. Model for Dynamic Self-Assembled Magnetic Surface Structures

    E-Print Network [OSTI]

    M. Belkin; A. Glatz; A. Snezhko; I. S. Aranson

    2010-02-02T23:59:59.000Z

    We propose a first-principles model for self-assembled magnetic surface structures on the water-air interface reported in earlier experiments \\cite{snezhko2,snezhko4}. The model is based on the Navier-Stokes equation for liquids in shallow water approximation coupled to Newton equations for interacting magnetic particles suspended on the water-air interface. The model reproduces most of the observed phenomenology, including spontaneous formation of magnetic snake-like structures, generation of large-scale vortex flows, complex ferromagnetic-antiferromagnetic ordering of the snake, and self-propulsion of bead-snake hybrids. The model provides valuable insights into self-organization phenomena in a broad range of non-equilibrium magnetic and electrostatic systems with competing interactions.

  8. Amphibia-Reptilia 35 (2014): 305-320 New insights on phylogeography and distribution of painted frogs

    E-Print Network [OSTI]

    Carranza, Salvador

    2014-01-01T23:59:59.000Z

    distribution models. 1 - Zoological Institute, Technical University of Braun- schweig, Mendelssohnstr. 4, 38106. Americo Vespucio s/n, 41092 Sevilla, Spain 6 - Centro de Investigação em Biodiversidade e Recursos

  9. Disjoining Pressure and the Film-Height-Dependent Surface Tension of Thin Liquid Films: New Insight from Capillary Wave Fluctuations

    E-Print Network [OSTI]

    Luis G. MacDowell; Jorge Benet; Nebil A. Katcho; Jose G. Palanco

    2014-06-25T23:59:59.000Z

    In this paper we review simulation and experimental studies of thermal capillary wave fluctuations as an ideal means for probing the underlying disjoining pressure and surface tensions, and more generally, fine details of the Interfacial Hamiltonian Model. We discuss recent simulation results that reveal a film-height-dependent surface tension not accounted for in the classical Interfacial Hamiltonian Model. We show how this observation may be explained bottom-up from sound principles of statistical thermodynamics and discuss some of its implications.

  10. Analysis of methods and models for assessing the direct and indirect economic impacts of CO/sub 2/-induced environmental changes in the agricultural sector of the US economy

    SciTech Connect (OSTI)

    Callaway, J.M.; Cronin, F.J.; Currie, J.W.; Tawil, J.

    1982-08-01T23:59:59.000Z

    The overall purpose of this research was to assist the US Department of Energy (DOE) in developing methods for assessing the direct and indirect economic impacts due to the effects of increases in the ambient concentration of CO/sub 2/ on agricultural production. First, a comprehensive literature search was undertaken to determine what types of models and methods have been developed, which could be effectively used to conduct assessments of the direct and indirect economic impacts of CO/sub 2/ buildup. Specific attention was focused upon models and methods for assessing the physical impacts of CO/sub 2/-induced environmental changes on crop yields; national and multi-regional agricultural sector models; and macroeconomic models of the US economy. The second task involved a thorough investigation of the research efforts being conducted by other public and private sector organizations in order to determine how more recent analytical methods being developed outside of DOE could be effectively integrated into a more comprehensive analysis of the direct economic impacts of CO/sub 2/ buildup. The third and final task involved synthesizing the information gathered in the first two tasks into a systematic framework for assessing the direct and indirect economic impacts of CO/sub 2/-induced environmental changes originating in the agricultural sector of the US economy. It is concluded that the direct economic impacts of CO/sub 2/ on the agricultural sector and the indirect economic impacts caused by spillover effects from agriculture to other sectors of the economy will be pervasive; however, the direction and magnitude of these impacts on producers and consumers cannot be determined a priori.

  11. MEASURING GALAXY STAR FORMATION RATES FROM INTEGRATED PHOTOMETRY: INSIGHTS FROM COLOR-MAGNITUDE DIAGRAMS OF RESOLVED STARS

    SciTech Connect (OSTI)

    Johnson, Benjamin D. [Institute d'Astrophysique de Paris, CNRS, UPMC, 98bis Bd Arago, F-75014 Paris (France); Weisz, Daniel R.; Dalcanton, Julianne J.; Johnson, L. C.; Williams, Benjamin F. [Department of Astronomy, Box 351580, University of Washington, Seattle, WA 98195 (United States); Dale, Daniel A. [Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071 (United States); Dolphin, Andrew E. [Raytheon, 1151 E. Hermans Road, Tucson, AZ 85756 (United States); Gil de Paz, Armando [CEI Campus Moncloa, UCM-UPM, Departamento de Astrofisica y CC. de la Atmosfera, Facultad de CC. Fisicas, Universidad Complutense de Madrid, Avda. Complutense s/n, E-28040 Madrid (Spain); Kennicutt, Robert C. Jr. [Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA (United Kingdom); Lee, Janice C. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Skillman, Evan D. [Department of Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455 (United States); Boquien, Mederic [Marseille Universite, CNRS, LAM (Laboratoire d'Astrophysique de Marseille) UMR 7326, F-13388 Marseille (France)

    2013-07-20T23:59:59.000Z

    We use empirical star formation histories (SFHs), measured from Hubble-Space-Telescope-based resolved star color-magnitude diagrams, as input into population synthesis codes to model the broadband spectral energy distributions (SEDs) of 50 nearby dwarf galaxies (6.5 < log M{sub *}/M{sub Sun} < 8.5, with metallicities {approx}10% solar). In the presence of realistic SFHs, we compare the modeled and observed SEDs from the ultraviolet (UV) through near-infrared and assess the reliability of widely used UV-based star formation rate (SFR) indicators. In the FUV through i bands, we find that the observed and modeled SEDs are in excellent agreement. In the Spitzer 3.6 {mu}m and 4.5 {mu}m bands, we find that modeled SEDs systematically overpredict observed luminosities by up to {approx}0.2 dex, depending on treatment of the TP-AGB stars in the synthesis models. We assess the reliability of UV luminosity as a SFR indicator, in light of independently constrained SFHs. We find that fluctuations in the SFHs alone can cause factor of {approx}2 variations in the UV luminosities relative to the assumption of a constant SFH over the past 100 Myr. These variations are not strongly correlated with UV-optical colors, implying that correcting UV-based SFRs for the effects of realistic SFHs is difficult using only the broadband SED. Additionally, for this diverse sample of galaxies, we find that stars older than 100 Myr can contribute from <5%-100% of the present day UV luminosity, highlighting the challenges in defining a characteristic star formation timescale associated with UV emission. We do find a relationship between UV emission timescale and broadband UV-optical color, though it is different than predictions based on exponentially declining SFH models. Our findings have significant implications for the comparison of UV-based SFRs across low-metallicity populations with diverse SFHs.

  12. A Population Model for the Academic Ecosystem

    E-Print Network [OSTI]

    Wu, Yan; Chiu, Dah Ming

    2015-01-01T23:59:59.000Z

    In recent times, the academic ecosystem has seen a tremendous growth in number of authors and publications. While most temporal studies in this area focus on evolution of co-author and citation network structure, this systemic inflation has received very little attention. In this paper, we address this issue by proposing a population model for academia, derived from publication records in the Computer Science domain. We use a generalized branching process as an overarching framework, which enables us to describe the evolution and composition of the research community in a systematic manner. Further, the observed patterns allow us to shed light on researchers' lifecycle encompassing arrival, academic life expectancy, activity, productivity and offspring distribution in the ecosystem. We believe such a study will help develop better bibliometric indices which account for the inflation, and also provide insights into sustainable and efficient resource management for academia.

  13. CIMS: A FRAMEWORK FOR INFRASTRUCTURE INTERDEPENDENCY MODELING AND ANALYSIS

    SciTech Connect (OSTI)

    Donald D. Dudenhoeffer; May R. Permann; Milos Manic

    2006-12-01T23:59:59.000Z

    Today’s society relies greatly upon an array of complex national and international infrastructure networks such as transportation, utilities, telecommunication, and even financial networks. While modeling and simulation tools have provided insight into the behavior of individual infrastructure networks, a far less understood area is that of the interrelationships among multiple infrastructure networks including the potential cascading effects that may result due to these interdependencies. This paper first describes infrastructure interdependencies as well as presenting a formalization of interdependency types. Next the paper describes a modeling and simulation framework called CIMS© and the work that is being conducted at the Idaho National Laboratory (INL) to model and simulate infrastructure interdependencies and the complex behaviors that can result.

  14. Modeling veterans healthcare administration disclosure processes : CY 2012 summary.

    SciTech Connect (OSTI)

    Beyeler, Walter Eugene; DeMenno, Mercy B.; Finley, Patrick D.

    2013-09-01T23:59:59.000Z

    As with other large healthcare organizations, medical adverse events at the Department of Veterans Affairs (VA) facilities can expose patients to unforeseen negative risks. VHA leadership recognizes that properly handled disclosure of adverse events can minimize potential harm to patients and negative consequences for the effective functioning of the organization. The work documented here seeks to help improve the disclosure process by situating it within the broader theoretical framework of issues management, and to identify opportunities for process improvement through modeling disclosure and reactions to disclosure. The computational model will allow a variety of disclosure actions to be tested across a range of incident scenarios. Our conceptual model will be refined in collaboration with domain experts, especially by continuing to draw on insights from VA Study of the Communication of Adverse Large-Scale Events (SCALE) project researchers.

  15. Learning Structural Changes of Gaussian Graphical Models in Controlled Experiments

    E-Print Network [OSTI]

    Zhang, Bai

    2012-01-01T23:59:59.000Z

    Graphical models are widely used in scienti fic and engineering research to represent conditional independence structures between random variables. In many controlled experiments, environmental changes or external stimuli can often alter the conditional dependence between the random variables, and potentially produce significant structural changes in the corresponding graphical models. Therefore, it is of great importance to be able to detect such structural changes from data, so as to gain novel insights into where and how the structural changes take place and help the system adapt to the new environment. Here we report an effective learning strategy to extract structural changes in Gaussian graphical model using l1-regularization based convex optimization. We discuss the properties of the problem formulation and introduce an efficient implementation by the block coordinate descent algorithm. We demonstrate the principle of the approach on a numerical simulation experiment, and we then apply the algorithm to...

  16. Coexistence of spinodal instability and thermal nucleation in thin-film rupture:Insights from molecular levels

    SciTech Connect (OSTI)

    Nguyen, Trung D [ORNL] [ORNL; Fuentes-Cabrera, Miguel A [ORNL] [ORNL; Fowlkes, Jason Davidson [ORNL] [ORNL; Rack, Philip D [ORNL] [ORNL

    2014-01-01T23:59:59.000Z

    Despite extensive investigation using hydrodynamic models and experiments over the past decades, there remain open questions regarding the origin of the initial rupture of thin liquid films. One of the reasons that makes it difficult to identify the rupture origin is the coexistence of two dewettingmechanisms, namely, thermal nucleation and spinodal instability, as observed in many experimental studies. Using a coarse-grained model and large-scale molecular dynamics simulations, we are able to characterize the very early stage of dewetting in nanometer-thick liquid-metal films wetting a solid substrate. We observe the features characteristic of both spinodal instability and thermal nucleation in the spontaneously dewetting films and show that these two macroscopic mechanisms share a common origin at molecular levels.

  17. Modeling and Diagnostics of Fuel Cell Porous Media for Improving Water Transport

    SciTech Connect (OSTI)

    Allen, Jeff; M'edici, Ezequiel

    2011-07-01T23:59:59.000Z

    When a fuel cell is operating at high current density, water accumulation is a significant cause of performance and component degradation. Investigating the water transport inside the fuel cell is a challenging task due to opacity of the components, the randomness of the porous materials, and the difficulty in gain access to the interior for measurement due to the small dimensions of components. Numerical simulation can provide a good insight of the evolution of the water transport under different working condition. However, the validation of those simulations is remains an issue due the same experimental obstacles associated with in-situ measurements. The discussion herein will focus on pore-network modeling of the water transport on the PTL and the insights gained from simulations as well as in the validation technique. The implications of a recently published criterion to characterize PTL, based on percolation theory, and validate numerical simulation are discussed.

  18. Improving the Usability of Integrated Assessment for Adaptation Practice: Insights from the U.S. Southeast Energy Sector

    SciTech Connect (OSTI)

    de Bremond, Ariane; Preston, Benjamin; Rice, Jennie S.

    2014-10-01T23:59:59.000Z

    Energy systems comprise a key sector of the U.S. economy, and one that has been identified as potentially vulnerable to the effects of climate variability and change. However, understanding of adaptation processes in energy companies and private entities more broadly is limited. It is unclear, for example, the extent to which energy companies are well-served by existing knowledge and tools emerging from the impacts, adaptation and vulnerability (IAV) and integrated assessment modeling (IAM) communities and/or what experiments, analyses, and model results have practical utility for informing adaptation in the energy sector. As part of a regional IAM development project, we investigated available evidence of adaptation processes in the energy sector, with a particular emphasis on the U.S. Southeast and Gulf Coast region. A mixed methods approach of literature review and semi-structured interviews with key informants from energy utilities was used to compare existing knowledge from the IAV community with that of regional stakeholders. That comparison revealed that much of the IAV literature on the energy sector is climate-centric and therefore disconnected from the more integrated decision-making processes and institutional perspectives of energy utilities. Increasing the relevance of research and assessment for the energy sector will necessitate a greater investment in integrated assessment and modeling efforts that respond to practical decision-making needs as well as greater collaboration between energy utilities and researchers in the design, execution, and communication of those efforts.

  19. Ventilation Model

    SciTech Connect (OSTI)

    H. Yang

    1999-11-04T23:59:59.000Z

    The purpose of this analysis and model report (AMR) for the Ventilation Model is to analyze the effects of pre-closure continuous ventilation in the Engineered Barrier System (EBS) emplacement drifts and provide heat removal data to support EBS design. It will also provide input data (initial conditions, and time varying boundary conditions) for the EBS post-closure performance assessment and the EBS Water Distribution and Removal Process Model. The objective of the analysis is to develop, describe, and apply calculation methods and models that can be used to predict thermal conditions within emplacement drifts under forced ventilation during the pre-closure period. The scope of this analysis includes: (1) Provide a general description of effects and heat transfer process of emplacement drift ventilation. (2) Develop a modeling approach to simulate the impacts of pre-closure ventilation on the thermal conditions in emplacement drifts. (3) Identify and document inputs to be used for modeling emplacement ventilation. (4) Perform calculations of temperatures and heat removal in the emplacement drift. (5) Address general considerations of the effect of water/moisture removal by ventilation on the repository thermal conditions. The numerical modeling in this document will be limited to heat-only modeling and calculations. Only a preliminary assessment of the heat/moisture ventilation effects and modeling method will be performed in this revision. Modeling of moisture effects on heat removal and emplacement drift temperature may be performed in the future.

  20. Comparisons of Statistical Multifragmentation and Evaporation Models for Heavy Ion Collisions

    E-Print Network [OSTI]

    Tsang, M B; Charity, R; Durand, D; Friedman, W A; Gulminelli, F; Lefèvre, A; Raduta, A H; Raduta, A R; Souza, S; Trautmann, W; Wada, R; Raduta, Ad.R.; Raduta, Al. H.

    2006-01-01T23:59:59.000Z

    The results from ten statistical multifragmentation models have been compared with each other using selected experimental observables. Even though details in any single observable may differ, the general trends among models are similar. Thus these models and similar ones are very good in providing important physics insights especially for general properties of the primary fragments and the multifragmentation process. Mean values and ratios of observables are also less sensitive to individual differences in the models. In addition to multifragmentation models, we have compared results from five commonly used evaporation codes. The fluctuations in isotope yield ratios are found to be a good indicator to evaluate the sequential decay implementation in the code. The systems and the observables studied here can be used as benchmarks for the development of statistical multifragmentation models and evaporation codes.

  1. Comparisons of Statistical Multifragmentation and Evaporation Models for Heavy Ion Collisions

    E-Print Network [OSTI]

    M. B. Tsang; R. Bougault; R. Charity; D. Durand; W. A. Friedman; F. Gulminelli; A. Le Fevre; Al. H. Raduta; Ad. R. Raduta; S. Souza; W. Trautmann; R. Wada

    2006-10-03T23:59:59.000Z

    The results from ten statistical multifragmentation models have been compared with each other using selected experimental observables. Even though details in any single observable may differ, the general trends among models are similar. Thus these models and similar ones are very good in providing important physics insights especially for general properties of the primary fragments and the multifragmentation process. Mean values and ratios of observables are also less sensitive to individual differences in the models. In addition to multifragmentation models, we have compared results from five commonly used evaporation codes. The fluctuations in isotope yield ratios are found to be a good indicator to evaluate the sequential decay implementation in the code. The systems and the observables studied here can be used as benchmarks for the development of statistical multifragmentation models and evaporation codes.

  2. Harmonic polynomials for expanding the fluctuations of the Cosmic Microwave Background: The Poincare and the 3-sphere model

    E-Print Network [OSTI]

    Peter Kramer

    2007-01-01T23:59:59.000Z

    Fluctuations of the Cosmic Microwave Background CMB are observed by the WMAP. When expanded into the harmonic eigenmodes of the space part of a cosmological model, they provide insight into the large-scale topology of space. All harmonic polynomials on the multiply connected dodecahedral Poincare space are constructed. Strong and specific selection rules are given by comparing the polynomials to those on the 3-sphere, its simply connected cover.

  3. Fundamentals of PV Efficiency Interpreted by a Two-Level Model

    E-Print Network [OSTI]

    Muhammad A. Alam; M. Ryyan Khan

    2012-09-13T23:59:59.000Z

    Elementary physics of photovoltaic energy conversion in a two-level atomic PV is considered. We explain the conditions for which the Carnot efficiency is reached and how it can be exceeded! The loss mechanisms - thermalization, angle entropy, and below-bandgap transmission - explain the gap between Carnot efficiency and the Shockley-Queisser limit. Wide varieties of techniques developed to reduce these losses (e.g., solar concentrators, solar-thermal, tandem cells, etc.) are reinterpreted by using a two level model. Remarkably, the simple model appears to capture the essence of PV operation and reproduce the key results and important insights that are known to the experts through complex derivations.

  4. Comparisons of Shewanella strains based on genome annotations, modeling and experiments

    SciTech Connect (OSTI)

    Ong, Wai Kit; Vu, Trang; Lovendahl, Klaus N.; Llull, Jenna; Serres, Margaret; Romine, Margaret F.; Reed, Jennifer L.

    2014-01-01T23:59:59.000Z

    Shewanella is a genus of facultatively anaerobic, Gram-negative bacteria that have highly adaptable metabolism which allows them to thrive in diverse environments. This quality makes them attractive target bacteria for research in bioremediation and microbial fuel cell applications. Constraint-based modeling is a useful tool for helping researchers gain insights into the metabolic capabilities of these bacteria. However, Shewanella oneidensis MR-1 is the only strain with a genome-scale metabolic model constructed out of the 22 sequenced Shewanella strains.

  5. Ventilation Model

    SciTech Connect (OSTI)

    V. Chipman

    2002-10-05T23:59:59.000Z

    The purpose of the Ventilation Model is to simulate the heat transfer processes in and around waste emplacement drifts during periods of forced ventilation. The model evaluates the effects of emplacement drift ventilation on the thermal conditions in the emplacement drifts and surrounding rock mass, and calculates the heat removal by ventilation as a measure of the viability of ventilation to delay the onset of peak repository temperature and reduce its magnitude. The heat removal by ventilation is temporally and spatially dependent, and is expressed as the fraction of heat carried away by the ventilation air compared to the fraction of heat produced by radionuclide decay. One minus the heat removal is called the wall heat fraction, or the remaining amount of heat that is transferred via conduction to the surrounding rock mass. Downstream models, such as the ''Multiscale Thermohydrologic Model'' (BSC 2001), use the wall heat fractions as outputted from the Ventilation Model to initialize their post-closure analyses. The Ventilation Model report was initially developed to analyze the effects of preclosure continuous ventilation in the Engineered Barrier System (EBS) emplacement drifts, and to provide heat removal data to support EBS design. Revision 00 of the Ventilation Model included documentation of the modeling results from the ANSYS-based heat transfer model. The purposes of Revision 01 of the Ventilation Model are: (1) To validate the conceptual model for preclosure ventilation of emplacement drifts and verify its numerical application in accordance with new procedural requirements as outlined in AP-SIII-10Q, Models (Section 7.0). (2) To satisfy technical issues posed in KTI agreement RDTME 3.14 (Reamer and Williams 2001a). Specifically to demonstrate, with respect to the ANSYS ventilation model, the adequacy of the discretization (Section 6.2.3.1), and the downstream applicability of the model results (i.e. wall heat fractions) to initialize post-closure thermal models (Section 6.6). (3) To satisfy the remainder of KTI agreement TEF 2.07 (Reamer and Williams 2001b). Specifically to provide the results of post-test ANSYS modeling of the Atlas Facility forced convection tests (Section 7.1.2). This portion of the model report also serves as a validation exercise per AP-SIII.10Q, Models, for the ANSYS ventilation model. (4) To further satisfy KTI agreements RDTME 3.01 and 3.14 (Reamer and Williams 2001a) by providing the source documentation referred to in the KTI Letter Report, ''Effect of Forced Ventilation on Thermal-Hydrologic Conditions in the Engineered Barrier System and Near Field Environment'' (Williams 2002). Specifically to provide the results of the MULTIFLUX model which simulates the coupled processes of heat and mass transfer in and around waste emplacement drifts during periods of forced ventilation. This portion of the model report is presented as an Alternative Conceptual Model with a numerical application, and also provides corroborative results used for model validation purposes (Section 6.3 and 6.4).

  6. Model development for household waste prevention behaviour

    SciTech Connect (OSTI)

    Bortoleto, Ana Paula, E-mail: a.bortoleto@sheffield.ac.uk [Department of Urban Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan); Kurisu, Kiyo H.; Hanaki, Keisuke [Department of Urban Engineering, University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan)

    2012-12-15T23:59:59.000Z

    Highlights: Black-Right-Pointing-Pointer We model waste prevention behaviour using structure equation modelling. Black-Right-Pointing-Pointer We merge attitude-behaviour theories with wider models from environmental psychology. Black-Right-Pointing-Pointer Personal norms and perceived behaviour control are the main behaviour predictors. Black-Right-Pointing-Pointer Environmental concern, moral obligation and inconvenience are the main influence on the behaviour. Black-Right-Pointing-Pointer Waste prevention and recycling are different dimensions of waste management behaviour. - Abstract: Understanding waste prevention behaviour (WPB) could enable local governments and decision makers to design more-effective policies for reducing the amount of waste that is generated. By merging well-known attitude-behaviour theories with elements from wider models from environmental psychology, an extensive cognitive framework that provides new and valuable insights is developed for understanding the involvement of individuals in waste prevention. The results confirm the usefulness of the theory of planned behaviour and of Schwartz's altruistic behaviour model as bases for modelling participation in waste prevention. A more elaborate integrated model of prevention was shown to be necessary for the complete analysis of attitudinal aspects associated with waste prevention. A postal survey of 158 respondents provided empirical support for eight of 12 hypotheses. The proposed structural equation indicates that personal norms and perceived behaviour control are the main predictors and that, unlike the case of recycling, subjective norms have a weak influence on WPB. It also suggests that, since social norms have not presented a direct influence, WPB is likely to be influenced by a concern for the environment and the community as well by perceptions of moral obligation and inconvenience. Results also proved that recycling and waste prevention represent different dimensions of waste management behaviour requiring particular approaches to increase individuals' engagement in future policies.

  7. Comment on "New Insights in the Electrocatalytic Proton Reduction and Hydrogen Oxidation by Bioinspired Catalysts: A DFT Investigation"

    SciTech Connect (OSTI)

    Dupuis, Michel; Chen, Shentan; Raugei, Simone; DuBois, Daniel L; Bullock, R. Morris

    2011-05-12T23:59:59.000Z

    In the title paper, Vetere et al. reported a computational investigation of the mechanism of H{sub 2} oxidation/proton reduction using a model of nickel-based electrocatalysts that incorporates pendant amines in cyclic phosphorus ligands. These catalysts are attracting considerable attention owing to their high turnover rates and relatively low overpotentials. These authors interpreted the results of their calculations as evidence for a symmetric bond cleavage of H{sub 2} leading directly to two protonated amines in concert with a two-electron reduction of the Ni(II) site to form a Ni(0) diproton state. Proton reduction would involve a reverse symmetric bond formation. We report here an analysis that refutes the interpretation by these authors. We give, for the same model system, the structure of a heterolytic cleavage transition state consistent with the presence of the Ni(II) center acting as a Lewis acid and the pendant amines acting as Lewis bases. We present the associated intrinsic reaction coordinate (IRC) pathway connecting the dihydrogen (?{sup 2}-H{sub 2}) adduct and a hydride–proton state. We report also the transition state and associated IRC for the proton rearrangement from a hydride–proton state to a diproton state. Finally, we complete the characterization of the transition state reported by Vetere et al. through a determination of the corresponding IRC. In summary, H{sub 2} oxidation/proton reduction with this class of catalysts involves a heterolytic bond breaking/formation.

  8. Toward the classification of the realistic free fermionic models

    SciTech Connect (OSTI)

    Faraggi, A.E.

    1997-08-01T23:59:59.000Z

    The realistic free fermionic models have had remarkable success in providing plausible explanations for various properties of the Standard Model which include the natural appearance of three generations, the explanation of the heavy top quark mass and the qualitative structure of the fermion mass spectrum in general, the stability of the proton and more. These intriguing achievements makes evident the need to understand the general space of these models. While the number of possibilities is large, general patterns can be extracted. In this paper the author presents a detailed discussion on the construction of the realistic free fermionic models with the aim of providing some insight into the basic structures and building blocks that enter the construction. The role of free phases in the determination of the phenomenology of the models is discussed in detail. The author discusses the connection between the free phases and mirror symmetry in (2,2) models and the corresponding symmetries in the case of (2,0) models. The importance of the free phases in determining the effective low energy phenomenology is illustrated in several examples. The classification of the models in terms of boundary condition selection rules, real world-sheet fermion pairings, exotic matter states and the hidden sector is discussed.

  9. OSPREY Model

    SciTech Connect (OSTI)

    Veronica J. Rutledge

    2013-01-01T23:59:59.000Z

    The absence of industrial scale nuclear fuel reprocessing in the U.S. has precluded the necessary driver for developing the advanced simulation capability now prevalent in so many other countries. Thus, it is essential to model complex series of unit operations to simulate, understand, and predict inherent transient behavior and feedback loops. A capability of accurately simulating the dynamic behavior of advanced fuel cycle separation processes will provide substantial cost savings and many technical benefits. The specific fuel cycle separation process discussed in this report is the off-gas treatment system. The off-gas separation consists of a series of scrubbers and adsorption beds to capture constituents of interest. Dynamic models are being developed to simulate each unit operation involved so each unit operation can be used as a stand-alone model and in series with multiple others. Currently, an adsorption model has been developed within Multi-physics Object Oriented Simulation Environment (MOOSE) developed at the Idaho National Laboratory (INL). Off-gas Separation and REcoverY (OSPREY) models the adsorption of off-gas constituents for dispersed plug flow in a packed bed under non-isothermal and non-isobaric conditions. Inputs to the model include gas, sorbent, and column properties, equilibrium and kinetic data, and inlet conditions. The simulation outputs component concentrations along the column length as a function of time from which breakthrough data is obtained. The breakthrough data can be used to determine bed capacity, which in turn can be used to size columns. It also outputs temperature along the column length as a function of time and pressure drop along the column length. Experimental data and parameters were input into the adsorption model to develop models specific for krypton adsorption. The same can be done for iodine, xenon, and tritium. The model will be validated with experimental breakthrough curves. Customers will be given access to OSPREY to used and evaluate the model.

  10. Beyond the Cosmological Standard Model

    E-Print Network [OSTI]

    Austin Joyce; Bhuvnesh Jain; Justin Khoury; Mark Trodden

    2014-12-15T23:59:59.000Z

    After a decade and a half of research motivated by the accelerating universe, theory and experiment have a reached a certain level of maturity. The development of theoretical models beyond \\Lambda, or smooth dark energy, often called modified gravity, has led to broader insights into a path forward, and a host of observational and experimental tests have been developed. In this review we present the current state of the field and describe a framework for anticipating developments in the next decade. We identify the guiding principles for rigorous and consistent modifications of the standard model, and discuss the prospects for empirical tests. We begin by reviewing attempts to consistently modify Einstein gravity in the infrared, focusing on the notion that additional degrees of freedom introduced by the modification must screen themselves from local tests of gravity. We categorize screening mechanisms into three broad classes: mechanisms which become active in regions of high Newtonian potential, those in which first derivatives become important, and those for which second derivatives are important. Examples of the first class, such as f(R) gravity, employ the familiar chameleon or symmetron mechanisms, whereas examples of the last class are galileon and massive gravity theories, employing the Vainshtein mechanism. In each case, we describe the theories as effective theories. We describe experimental tests, summarizing laboratory and solar system tests and describing in some detail astrophysical and cosmological tests. We discuss future tests which will be sensitive to different signatures of new physics in the gravitational sector. Parts that are more relevant to theorists vs. observers/experimentalists are clearly indicated, in the hope that this will serve as a useful reference for both audiences, as well as helping those interested in bridging the gap between them.

  11. Sandia Energy - Systems Modeling

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

    Simulation Model Energy, Power & Water Simulation Model SunCity Model Water, Energy and Carbon Sequestration Model Gila Basin-Az Water Settlement Model Electrical Grid Storage...

  12. A case for variational geomagnetic data assimilation: insights from a one-dimensional, nonlinear, and sparsely observed MHD system

    E-Print Network [OSTI]

    Fournier, Alexandre; Alboussière, Thierry

    2007-01-01T23:59:59.000Z

    Secular variations of the geomagnetic field have been measured with a continuously improving accuracy during the last few hundred years, culminating nowadays with satellite data. It is however well known that the dynamics of the magnetic field is linked to that of the velocity field in the core and any attempt to model secular variations will involve a coupled dynamical system for magnetic field and core velocity. Unfortunately, there is no direct observation of the velocity. Independently of the exact nature of the above-mentioned coupled system -- some version being currently under construction -- the question is debated in this paper whether good knowledge of the magnetic field can be translated into good knowledge of core dynamics. Furthermore, what will be the impact of the most recent and precise geomagnetic data on our knowledge of the geomagnetic field of the past and future? These questions are cast into the language of variational data assimilation, while the dynamical system considered in this pape...

  13. Insight into the photoelectron angular dependent energy distribution of negative-electron-affinity InP photocathodes

    SciTech Connect (OSTI)

    Chen, Zhanghui; Jiang, Xiangwei; Dong, Shan; Li, Jingbo, E-mail: jbli@semi.ac.cn; Li, Shushen [State Key Laboratory of Superlattices and Microstructures, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083 (China); Wang, Linwang [Materials Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Mail Stop 50F, Berkeley, California 94720 (United States)

    2014-01-13T23:59:59.000Z

    Energy distribution and angular distribution of the photoelectrons from InP photocathodes are investigated using a precise Monte Carlo model. It is found that ?-valley electrons contribute to the first peak of the energy distribution curve, but the second peak is contributed by both ?-valley and L-valley electrons rather than only L-valley electrons. L valley electrons are shown to have a smaller angular spread than ?-valley electrons, which is attributed to the much higher potential energy of L-valley minimum. The further simulation indicates that the performance of InP photocathodes can be improved by increasing the hole concentration or decreasing the temperature, but the activation layer thickness variation only has very slight influence on either energy or angular distribution.

  14. Policy modeling for industrial energy use

    SciTech Connect (OSTI)

    Worrell, Ernst; Park, Hi-Chun; Lee, Sang-Gon; Jung, Yonghun; Kato, Hiroyuki; Ramesohl, Stephan; Boyd, Gale; Eichhammer, Wolfgang; Nyboer, John; Jaccard, Mark; Nordqvist, Joakim; Boyd, Christopher; Klee, Howard; Anglani, Norma; Biermans, Gijs

    2003-03-01T23:59:59.000Z

    The international workshop on Policy Modeling for Industrial Energy Use was jointly organized by EETA (Professional Network for Engineering Economic Technology Analysis) and INEDIS (International Network for Energy Demand Analysis in the Industrial Sector). The workshop has helped to layout the needs and challenges to include policy more explicitly in energy-efficiency modeling. The current state-of-the-art models have a proven track record in forecasting future trends under conditions similar to those faced in the recent past. However, the future of energy policy in a climate-restrained world is likely to demand different and additional services to be provided by energy modelers. In this workshop some of the international models used to make energy consumption forecasts have been discussed as well as innovations to enable the modeling of policy scenarios. This was followed by the discussion of future challenges, new insights in the data needed to determine the inputs into energy model s, and methods to incorporate decision making and policy in the models. Based on the discussion the workshop participants came to the following conclusions and recommendations: Current energy models are already complex, and it is already difficult to collect the model inputs. Hence, new approaches should be transparent and not lead to extremely complex models that try to ''do everything''. The model structure will be determined by the questions that need to be answered. A good understanding of the decision making framework of policy makers and clear communication on the needs are essential to make any future energy modeling effort successful. There is a need to better understand the effects of policy on future energy use, emissions and the economy. To allow the inclusion of policy instruments in models, evaluation of programs and instruments is essential, and need to be included in the policy instrument design. Increased efforts are needed to better understand the effects of innovative (no n-monetary) policy instruments through evaluation and to develop approaches to model both conventional and innovative policies. The explicit modeling of barriers and decision making in the models seems a promising way to enable modeling of conventional and innovative policies. A modular modeling approach is essential to not only provide transparency, but also to use the available resources most effectively and efficiently. Many large models have been developed in the past, but have been abandoned after only brief periods of use. A development path based on modular building blocks needs the establishment of a flexible but uniform modeling framework. The leadership of international agencies and organizations is essential in the establishment of such a framework. A preference is given for ''softlinks'' between different modules and models, to increase transparency and reduce complexity. There is a strong need to improve the efficiency of data collection and interpretation efforts to produce reliable model inputs. The workshop participants support the need for the establishment of an (in-)formal exchanges of information, as well as modeling approaches. The development of an informal network of research institutes and universities to help build a common dataset and exchange ideas on specific areas is proposed. Starting with an exchange of students would be a relative low-cost way to start such collaboration. It would be essential to focus on specific topics. It is also essential to maintain means of regular exchange of ideas between researchers in the different focus points.

  15. Finding low-energy conformations of lattice protein models by quantum annealing

    E-Print Network [OSTI]

    Perdomo-Ortiz, Alejandro; Drew-Brook, Marshall; Rose, Geordie; Aspuru-Guzik, Alán

    2012-01-01T23:59:59.000Z

    Lattice protein folding models are a cornerstone of computational biophysics. Although these models are a coarse grained representation, they provide useful insight into the energy landscape of natural proteins. Finding low-energy three-dimensional structures is an intractable problem even in the simplest model, the Hydrophobic-Polar (HP) model. Exhaustive search of all possible global minima is limited to sequences in the tens of amino acids. Description of protein-like properties are more accurately described by generalized models, such as the one proposed by Miyazawa and Jernigan (MJ), which explicitly take into account the unique interactions among all 20 amino acids. There is theoretical and experimental evidence of the advantage of solving classical optimization problems using quantum annealing over its classical analogue (simulated annealing). In this report, we present a benchmark implementation of quantum annealing for a biophysical problem (six different experiments up to 81 superconducting quantum ...

  16. Modeling Quality Information within Business Process Models

    E-Print Network [OSTI]

    Paech, Barbara

    Modeling Quality Information within Business Process Models Robert Heinrich, Alexander Kappe. Business process models are a useful means to document information about structure and behavior literature and tool survey on modeling quality information within business process models. Keywords: Business

  17. Dependence of Ridge Formation on Trigger Azimuth: Correlated Emission Model

    E-Print Network [OSTI]

    Charles B. Chiu; Rudolph C. Hwa

    2009-01-05T23:59:59.000Z

    Ridge formation in near-side correlation in heavy-ion collisions is studied in the framework of a phenomenological model, called Correlated Emission Model (CEM). Successive soft emissions due to jet-medium interaction lead to the enhancement of thermal partons which follow the local flow directions. The correlation between the flow direction and the semihard parton direction is the major factor that causes the ridge formation to depend on the trigger direction relative to the reaction plane. With the use of a few parameters we have been able to reproduce the data on the ridge yields as functions of the trigger azimuthal angle for different centralities. An inside-outside asymmetry function is proposed to further probe the characteristics of the azimuthal correlation function. Insights are provided for the understanding of some detailed aspects of the centrality dependence.

  18. Challenges in Modeling the Degradation of Ceramic Waste Forms

    SciTech Connect (OSTI)

    Devanathan, Ramaswami; Gao, Fei; Sun, Xin

    2011-09-01T23:59:59.000Z

    We identify the state of the art, gaps in current understanding, and key research needs in the area of modeling the long-term degradation of ceramic waste forms for nuclear waste disposition. The directed purpose of this report is to define a roadmap for Waste IPSC needs to extend capabilities of waste degradation to ceramic waste forms, which overlaps with the needs of the subconsinuum scale of FMM interests. The key knowledge gaps are in the areas of (i) methodology for developing reliable interatomic potentials to model the complex atomic-level interactions in waste forms; (ii) characterization of water interactions at ceramic surfaces and interfaces; and (iii) extension of atomic-level insights to the long time and distance scales relevant to the problem of actinide and fission product immobilization.

  19. Modeling Arcs

    SciTech Connect (OSTI)

    Insepov, Z.; Norem, J. [Argonne National Lab, Argonne, IL 60439 (United States); Vetizer, S.; Mahalingam, S. [Tech-X Corp., Boulder, CO (United States)

    2011-12-23T23:59:59.000Z

    Although vacuum arcs were first identified over 110 years ago, they are not yet well understood. We have since developed a model of breakdown and gradient limits that tries to explain, in a self-consistent way: arc triggering, plasma initiation, plasma evolution, surface damage and gradient limits. We use simple PIC codes for modeling plasmas, molecular dynamics for modeling surface breakdown, and surface damage, and mesoscale surface thermodynamics and finite element electrostatic codes for to evaluate surface properties. Since any given experiment seems to have more variables than data points, we have tried to consider a wide variety of arcing (rf structures, e beam welding, laser ablation, etc.) to help constrain the problem, and concentrate on common mechanisms. While the mechanisms can be comparatively simple, modeling can be challenging.

  20. Programming models

    SciTech Connect (OSTI)

    Daniel, David J [Los Alamos National Laboratory; Mc Pherson, Allen [Los Alamos National Laboratory; Thorp, John R [Los Alamos National Laboratory; Barrett, Richard [SNL; Clay, Robert [SNL; De Supinski, Bronis [LLNL; Dube, Evi [LLNL; Heroux, Mike [SNL; Janssen, Curtis [SNL; Langer, Steve [LLNL; Laros, Jim [SNL

    2011-01-14T23:59:59.000Z

    A programming model is a set of software technologies that support the expression of algorithms and provide applications with an abstract representation of the capabilities of the underlying hardware architecture. The primary goals are productivity, portability and performance.

  1. LEDCOM Model

    Broader source: Energy.gov [DOE]

    Zip file containing the LEDCOM model as an excel worksheet, the backend database, and an operating information document. Extract all files to the same local directory on your computer.

  2. 24/03/2011 15:53Insight into parasite 'family planning' could help target malaria Page 1 of 2http://www.sciencedaily.com/releases/2011/03/110316104111.htm

    E-Print Network [OSTI]

    Gardner, Andy

    the right amount of damage could be the best way to interrupt the malaria parasite's development) -- Fresh insight into the way the parasite that causes malaria reproduces could lead to new treatments Transmission to Mosquitoes (Dec. 20, 2009) -- An experimental nasally administered malaria vaccine prevented

  3. InSight: RIVIER ACADEMIC JOURNAL, VOLUME 5, NUMBER 2, FALL 2009 Copyright 2009 by Daniel Szilagyi, Arti Sood and Tejinder Singh. Published by Rivier College, with permission. 1

    E-Print Network [OSTI]

    Riabov, Vladimir V.

    InSight: RIVIER ACADEMIC JOURNAL, VOLUME 5, NUMBER 2, FALL 2009 Copyright © 2009 by Daniel Szilagyi Szilagyi*, Arti Sood** and Tejinder Singh§ M.S. in Computer Science Program, Rivier College #12;Daniel Szilagyi, Arti Sood, and Tejinder Singh 2 Service Providers (ISPs). The ability to act as proxy server

  4. Theoretical Insight into the Interactions of TMA-Benzene and TMA-Pyrrole with B3LYP Density-Functional Theory (DFT) and ab Initio Second Order Mller-Plesset Perturbation

    E-Print Network [OSTI]

    Sussman, Joel L.

    Theoretical Insight into the Interactions of TMA-Benzene and TMA-Pyrrole with B3LYP Density theoretical investigation of the tetramethylammonium(TMA)-benzene and TMA-pyrrole complexes has been performed density in the 5 6 aromatic system of pyrrole is larger than that in the 6 6 system of benzene

  5. Ertek, G., Tun, M.M., Kurtaraner, E., Kebude, D., 2012, 'Insights into the Efficiencies of On-Shore Wind Turbines: A Data-Centric Analysis', INISTA 2012 Conference. July 2-4, 2012, Trabzon,

    E-Print Network [OSTI]

    Yanikoglu, Berrin

    -Shore Wind Turbines: A Data-Centric Analysis', INISTA 2012 Conference. July 2-4, 2012, Trabzon, Turkey://research.sabanciuniv.edu. Insights into the Efficiencies of On-Shore Wind Turbines: A Data-Centric Analysis Gürdal Ertek, Murat University Istanbul, Turkey Abstract--Literature on renewable energy alternative of wind turbines does

  6. The March 11, 2002 Masafi, United Arab Emirates Earthquake: Insights into the Seismotectonics of the Northern Oman Mountains

    SciTech Connect (OSTI)

    Rodgers, A; Fowler, A; Al-Amri, A; Al-Enezi, A

    2005-04-26T23:59:59.000Z

    A moderate (M{approx}5) earthquake struck the northeastern United Arab Emirates (UAE) and northern Oman on March 11, 2002. The event was felt over a wide area of the northern Emirates and was accompanied by smaller (felt) events before and after the March 11 main shock. The event was large enough to be detected and located by global networks at teleseismic distances. We estimated focal mechanism and depth from broadband complete regional waveform modeling. We report a normal mechanism with a slight right-lateral strike-slip component consistent with the large-scale tectonics. The normal component suggests relaxation of obducted crust of the Semail Ophilite (specifically, the Khor Fakkan Block) while the right-lateral strike-slip component of the mechanism is consistent with shear across the Oman Line. Felt earthquakes are rare in the region, however no regional seismic network exists in the UAE to determine local seismicity. This event offers a unique opportunity to study the active tectonics of the region as well as inform future studies of seismic hazard in the UAE and northern Oman.

  7. Insights into gas heating and cooling in the disc of NGC 891 from Herschel far-infrared spectroscopy

    E-Print Network [OSTI]

    Hughes, T M; Schirm, M R P; Parkin, T J; De Looze, I; Wilson, C D; Bendo, G J; Baes, M; Fritz, J; Boselli, A; Cooray, A; Cormier, D; Karczewski, O ?; Lebouteiller, V; Lu, N; Madden, S C; Spinoglio, L; Viaene, S

    2014-01-01T23:59:59.000Z

    We present Herschel PACS and SPIRE spectroscopy of the most important far-infrared cooling lines in the nearby edge-on spiral galaxy, NGC 891: [CII] 158 $\\mu$m, [NII] 122, 205 $\\mu$m, [OI] 63, 145 $\\mu$m, and [OIII] 88 $\\mu$m. We find that the photoelectric heating efficiency of the gas, traced via the ([CII]+[OII]63)/$F_{\\mathrm{TIR}}$ ratio, varies from a mean of 3.5$\\times$10$^{-3}$ in the centre up to 8$\\times$10$^{-3}$ at increasing radial and vertical distances in the disc. A decrease in ([CII]+[OII]63)/$F_{\\mathrm{TIR}}$ but constant ([CII]+[OI]63)/$F_{\\mathrm{PAH}}$ with increasing FIR colour suggests that polycyclic aromatic hydrocarbons (PAHs) may become important for gas heating in the central regions. We compare the observed flux of the FIR cooling lines and total IR emission with the predicted flux from a PDR model to determine the gas density, surface temperature and the strength of the incident far-ultraviolet (FUV) radiation field, $G_{0}$. Resolving details on physical scales of ~0.6 kpc, a p...

  8. Comment on 'New Insights in the Electrocatalytic Proton Reduction and Hydrogen Oxidation by Bioinspired Catalysts: A DFT Investigation'

    SciTech Connect (OSTI)

    Dupuis, Michel; Chen, Shentan; Raugei, Simone; DuBois, Daniel L.; Bullock, R. Morris

    2011-05-12T23:59:59.000Z

    In the title paper, Vetere et al. reported a computational investigation of the mechanism of oxidation of H2 / proton reduction using a model nickel complex for nickel-based electrocatalysts with cyclic phosphorous ligands incorporating pendant amines. These catalysts are attracting considerable attention owing to their high turn-over rates and relatively low overpotentials. These authors interpreted the results of their calculations as evidence for a symmetric bond breaking (forming) of H2 directly to (from) two protonated amines in concert with a 2-electron reduction of the Ni(II) site to form a Ni(0) di-proton state. We show here that this interpretation is erroneous as we report the structure of an heterolytic cleavage transition state consistent with the presence of the Ni(II) center acting as a Lewis acid and of the pendant amines acting as Lewis bases. We determined the associated intrinsic reaction coordinate (IRC) pathway connecting the di-hydrogen (?2-H2) adduct and a hydride-proton state. We also characterize differently the nature of the transition state reported by these authors. H2 oxidation / proton reduction with this class of catalysts is a heterolytic process.

  9. Liberalizing Capital Flows in India: Financial Repression, Macroeconomic Policy and Gradual Reforms

    E-Print Network [OSTI]

    Kletzer, Kenneth

    2004-01-01T23:59:59.000Z

    2004], “Fiscal Policy in India: Lessons and Priorities,”analyses of fiscal policy in India include, Pinto andtaxes and regulatory policies in India and across the states

  10. Macroeconomic Theory MW 7:00 to 8:15 PM

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Accounting 3. Saving and Investment 4. Price Level and Interest Rates 5. Employment and Unemployment Readings of Monetary Economics, September 1982. 3. Perron, "The Great Crash, the Oil Price Shock, and the Unit Root. Investment Demand 3. Saving Equals Investment C. Asset Markets 1. Demand for Money 2. Supply of Money 3

  11. Macroeconomic Theory MW 5:30 to 6:45 PM

    E-Print Network [OSTI]

    Ahmad, Sajjad

    Accounting 3. Saving and Investment 4. Price Level and Interest Rates 5. Employment and Unemployment Readings of Monetary Economics, September 1982. 3. Perron, "The Great Crash, the Oil Price Shock, and the Unit Root. Investment Demand 3. Saving Equals Investment C. Asset Markets 1. Demand for Money 2. Supply of Money 3

  12. High-End Variety Exporters Defying Distance: Micro Facts and Macroeconomic Implications

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    features of high-end variety exports could affect the response of aggregate foreign sales to demand shocks, but they export to more distant ones. This comes with a greater geographic diversification of their aggregate, the sources of a country's aggregate exports volatility are modified. The higher sensitivity to per capita

  13. Essays in Applied Macroeconomics: Asymmetric Price Adjustment, Exchange Rate and Treatment Effect

    E-Print Network [OSTI]

    Gu, Jingping

    2009-05-15T23:59:59.000Z

    -varying volatility of gasoline price disturbances is an important feature of the data, and when we allow for asymmetric GARCH errors and investigate the system wide impulse response function, we find evidence of asymmetric adjustment to crude oil price changes...

  14. Insights into the Molecular Activation Mechanism of the RhoA-specific Guanine Nucleotide Exchange Factor, PDZRhoGEF

    SciTech Connect (OSTI)

    Bielnicki, Jakub A.; Shkumatov, Alexander V.; Derewenda, Urszula; Somlyo, Avril V.; Svergun, Dmitri I.; Derewenda, Zygmunt S. (EMBL); (UV)

    2012-10-09T23:59:59.000Z

    PDZRhoGEF (PRG) belongs to a small family of RhoA-specific nucleotide exchange factors that mediates signaling through select G-protein-coupled receptors via G{alpha}{sub 12/13} and activates RhoA by catalyzing the exchange of GDP to GTP. PRG is a multidomain protein composed of PDZ, regulators of G-protein signaling-like (RGSL), Dbl-homology (DH), and pleckstrin-homology (PH) domains. It is autoinhibited in cytosol and is believed to undergo a conformational rearrangement and translocation to the membrane for full activation, although the molecular details of the regulation mechanism are not clear. It has been shown recently that the main autoregulatory elements of PDZRhoGEF, the autoinhibitory 'activation box' and the 'GEF switch,' which is required for full activation, are located directly upstream of the catalytic DH domain and its RhoA binding surface, emphasizing the functional role of the RGSL-DH linker. Here, using a combination of biophysical and biochemical methods, we show that the mechanism of PRG regulation is yet more complex and may involve an additional autoinhibitory element in the form of a molten globule region within the linker between RGSL and DH domains. We propose a novel, two-tier model of autoinhibition where the activation box and the molten globule region act synergistically to impair the ability of RhoA to bind to the catalytic DH-PH tandem. The molten globule region and the activation box become less ordered in the PRG-RhoA complex and dissociate from the RhoA-binding site, which may constitute a critical step leading to PRG activation.

  15. Model systems This year's model

    E-Print Network [OSTI]

    Raines, Ronald T.

    @biochem.wisc.edu RTR received ScB degrees in chemistry and biology from the Massachusetts Institute of Technology that initially inspired the chemical simplification. In such cases, the later stages of model studies can seem

  16. R&D for computational cognitive and social models : foundations for model evaluation through verification and validation (final LDRD report).

    SciTech Connect (OSTI)

    Slepoy, Alexander; Mitchell, Scott A.; Backus, George A.; McNamara, Laura A.; Trucano, Timothy Guy

    2008-09-01T23:59:59.000Z

    Sandia National Laboratories is investing in projects that aim to develop computational modeling and simulation applications that explore human cognitive and social phenomena. While some of these modeling and simulation projects are explicitly research oriented, others are intended to support or provide insight for people involved in high consequence decision-making. This raises the issue of how to evaluate computational modeling and simulation applications in both research and applied settings where human behavior is the focus of the model: when is a simulation 'good enough' for the goals its designers want to achieve? In this report, we discuss two years' worth of review and assessment of the ASC program's approach to computational model verification and validation, uncertainty quantification, and decision making. We present a framework that extends the principles of the ASC approach into the area of computational social and cognitive modeling and simulation. In doing so, we argue that the potential for evaluation is a function of how the modeling and simulation software will be used in a particular setting. In making this argument, we move from strict, engineering and physics oriented approaches to V&V to a broader project of model evaluation, which asserts that the systematic, rigorous, and transparent accumulation of evidence about a model's performance under conditions of uncertainty is a reasonable and necessary goal for model evaluation, regardless of discipline. How to achieve the accumulation of evidence in areas outside physics and engineering is a significant research challenge, but one that requires addressing as modeling and simulation tools move out of research laboratories and into the hands of decision makers. This report provides an assessment of our thinking on ASC Verification and Validation, and argues for further extending V&V research in the physical and engineering sciences toward a broader program of model evaluation in situations of high consequence decision-making.

  17. Insights into Stabilization of the 99TcVO Core for Synthesis of 99TcVO Compounds

    SciTech Connect (OSTI)

    McGregor, Donna; Burton-Pye, Benjamin P.; Lukens, Wayne W.; Howell, Robertha C.; Francesconi, Lynn C.

    2014-01-01T23:59:59.000Z

    Synthesis of technetium-99 (99Tc; t1/2: 2.1 105 years, max: 253 keV) materials is of importance in studies of the nuclear fuel cycle where Tc is a major fission product (6percent thermal yield from 235U and 239Pu), in understanding radioactive tank waste composition, and in identifying 99mTc compounds for nuclear medicine imaging. One of the most useful synthetic starting materials, (NBu4)TcOCl4, is susceptible to disproportionation in water to form TcO4 and TcIV species, especially TcO2 2H2O. This unwanted reaction is especially problematic when working with ligands bearing hard donor atoms, such as oxygen, where the stability with the soft TcV=O3+ core may be low. Polyoxometalates (POMs) are such ligands. They possess defect sites with four hard oxygen atoms and show low (ca. 108) stability constants with transition metals. Tc complexes of POMs are molecular-level models for Tc metal oxide solid-state materials and can provide information on coordination and redox environments of metal oxides that stabilize low-valent Tc. In order to synthesize pure Tc POM complexes [TcVO(1-P2W17O61)]7 (TcVO-1) and [TcVO(2-P2W17O61)]7 (TcVO-2) from (NBu4)TcOCl4, we have identified strategies that minimize formation of TcIV species and optimize the formation of pure TcV species. The parameters that we consider are the amount of ethylene glycol, which is employed as a transfer ligand to prevent hydrolysis of (NBu4)TcOCl4, and the precipitating agent. The TcIV species that contaminates the non-optimized syntheses is likely a TcIV -oxido-bridged dimer [TcIV-(-O)2-TcIV]. We also employ a novel procedure where the 2 ligand is photoactivated and reduced (in the presence of a sacrificial electron donor) to subsequently reduce TcVIIO4 to an isolatable TcVO-2 product that is remarkably free of TcIV.

  18. ISDAC Modeling

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh School footballHydrogen andHypernucleiNORTHWESTOfficeModeling Modeling

  19. In Silico Modeling of Geobacter Species.

    SciTech Connect (OSTI)

    Lovley, Derek, R.

    2008-01-29T23:59:59.000Z

    This project employed a combination of in silico modeling and physiological studies to begin the construction of models that could predict the activity of Geobacter species under different environmental conditions. A major accomplishment of the project was the development of the first genome-based models of organisms known environmental relevance. This included the modeling of two Geobacter species and two species of Pelobacter. Construction of these models required increased sophistication in the annotation of the original draft genomes as well as collection of physiological data on growth yields, cell composition, and metabolic reactions. Biochemical studies were conducted to determine whether proposed enzymatic reactions were in fact expressed. During this process we developed an Automodel Pipeline process to accelerate future model development of other environmentally relevant organisms by using bioinformatics techniques to leverage predicted protein sequences and the Genomatica database containing a collection of well-curated metabolic models. The Automodel Pipeline was also used for iterative updating of the primary Geobacter model of G. sulfurreducens to expand metabolic functions or to add alternative pathways. Although each iteration of the model does not lead to another publication, it is an invaluable resource for hypothesis development and evaluation of experimental data. In order to develop a more accurate G. sulfurreducens model, a series of physiological studies that could be analyzed in the context of the model were carried out. For example, previous field trials of in situ uranium bioremediation demonstrated that Geobacter species face an excess of electron donor and a limitation of electron acceptor near the point of acetate injection into the groundwater. Therefore, a model-based analysis of electron acceptor limitation physiology was conducted and model predictions were compared with growth observed in chemostats. Iterative studies resulted in the model accurately predicting acetate oxidation and electron acceptor reduction. The model also predicted that G. sulfurreducens must release hydrogen under electron-accepting conditions in order to maintain charge and electron balance. This prediction was borne out by subsequent hydrogen measurements. Furthermore, changes in gene expression were consistent with model predictions of flux changes around central metabolism. The model revealed multiple redundant pathways in central metabolism suggesting an apparent versatility unusual in microbial metabolism. The computational analysis led to the identification of 32 reactions that participated in eight sets of redundant pathways. The computational results guided the design of strains with mutations in key reactions to elucidate the role of the alternate pathways and obtain information on their physiological function. A total of seven strains with mutations in genes encoding five metabolic reactions were constructed and their phenotypes analyzed in 12 different environments. This analysis revealed several interesting insights on the role of the apparent redundant pathways. 13C labeling approaches were developed for further elucidation of metabolic pathways with model-driven interpretation. For example, the model was used to calculate the optimal acetate 13C labeling ratio for distinguishing flux through various pathways based on amino acid isotopomer distributions. With this method it was possible to elucidate the pathways for amino acid biosynthesis. Surprisingly, the labeling pattern of isoleucine deviated significantly from what was predicted by the metabolic reconstruction. Detailed analysis of the labeling patterns with the model led to the discovery that there are two pathways for leucine biosynthesis, including a novel citramalate pathway that was subsequently confirmed with biochemical analysis. In summary, the combined computational and experimental studies have been instrumental in further characterizing the central metabolism of members of the Geobacteraceae. Furthermore, the methods developed in these

  20. Modelling osteomyelitis

    E-Print Network [OSTI]

    Liò, Pietro; Paoletti, Nicola; Moni, Mohammad A; Atwell, Kathryn; Merelli, Emanuela; Viceconti, Marco

    2012-09-07T23:59:59.000Z

    13 of 14 12. Paoletti N, Lio P, Merelli E, Viceconti M: Multi-level Computational Modeling and Quantitative Analysis of Bone Remodeling. IEEE/ACM Transactions on Computational Biology and Bioinformatics 2012, 99(PrePrints). 13. Geris L, Vander Sloten...