National Library of Energy BETA

Sample records for research general circulation

  1. Ocean General Circulation Models

    SciTech Connect (OSTI)

    Yoon, Jin-Ho; Ma, Po-Lun

    2012-09-30

    1. Definition of Subject The purpose of this text is to provide an introduction to aspects of oceanic general circulation models (OGCMs), an important component of Climate System or Earth System Model (ESM). The role of the ocean in ESMs is described in Chapter XX (EDITOR: PLEASE FIND THE COUPLED CLIMATE or EARTH SYSTEM MODELING CHAPTERS). The emerging need for understanding the Earth’s climate system and especially projecting its future evolution has encouraged scientists to explore the dynamical, physical, and biogeochemical processes in the ocean. Understanding the role of these processes in the climate system is an interesting and challenging scientific subject. For example, a research question how much extra heat or CO2 generated by anthropogenic activities can be stored in the deep ocean is not only scientifically interesting but also important in projecting future climate of the earth. Thus, OGCMs have been developed and applied to investigate the various oceanic processes and their role in the climate system.

  2. Thermospheric tides simulated by the national center for atmospheric research thermosphere-ionosphere general circulation model at equinox

    SciTech Connect (OSTI)

    Fesen, C.G. (Dartmouth College, Hanover, NH (United States)); Roble, R.G.; Ridley, E.C. (National Center for Atmospheric Research, Boulder, CO (United States))

    1993-05-01

    The authors use the National Center for Atmospheric Research (NCAR) thermosphere/ionosphere general circulation model (TIGCM) to model tides and dynamics in the thermosphere. This model incorporates the latest advances in the thermosphere general circulation model. Model results emphasized the 70[degree] W longitude region to overlap a series of incoherent radar scatter installations. Data and the model are available on data bases. The results of this theoretical modeling are compared with available data, and with prediction of more empirical models. In general there is broad agreement within the comparisons.

  3. Water isotopes and the general circulation

    E-Print Network [OSTI]

    Noone, David

    quantities are equator to pole temperature gradient, and the vertical thermal stratification #12;Isotopic" is the fractionation factor is a function of temperature F depends on large scale circulation and thermal state Both, temperature gradient/condensation) 2. Entrainment of non-depleted water (humidity, stratification/sheer) #12

  4. On the Wind Power Input to the Ocean General Circulation

    E-Print Network [OSTI]

    Zhai, Xiaoming

    The wind power input to the ocean general circulation is usually calculated from the time-averaged wind products. Here, this wind power input is reexamined using available observations, focusing on the role of the synoptically ...

  5. Simulation of snow mass and extent in general circulation models

    E-Print Network [OSTI]

    Yang, Zong-Liang

    Simulation of snow mass and extent in general circulation models Zong-Liang Yang,1,2* Robert E Scheme (BATS) snow submodel was conducted, both in a stand-alone mode and within the National Center Union and from Mammoth Mountain, California. The BATS snow scheme reproduces well the seasonal evolution

  6. Application of Improved Radiation Modeling to General Circulation Models

    SciTech Connect (OSTI)

    Michael J Iacono

    2011-04-07

    This research has accomplished its primary objectives of developing accurate and efficient radiation codes, validating them with measurements and higher resolution models, and providing these advancements to the global modeling community to enhance the treatment of cloud and radiative processes in weather and climate prediction models. A critical component of this research has been the development of the longwave and shortwave broadband radiative transfer code for general circulation model (GCM) applications, RRTMG, which is based on the single-column reference code, RRTM, also developed at AER. RRTMG is a rigorously tested radiation model that retains a considerable level of accuracy relative to higher resolution models and measurements despite the performance enhancements that have made it possible to apply this radiation code successfully to global dynamical models. This model includes the radiative effects of all significant atmospheric gases, and it treats the absorption and scattering from liquid and ice clouds and aerosols. RRTMG also includes a statistical technique for representing small-scale cloud variability, such as cloud fraction and the vertical overlap of clouds, which has been shown to improve cloud radiative forcing in global models. This development approach has provided a direct link from observations to the enhanced radiative transfer provided by RRTMG for application to GCMs. Recent comparison of existing climate model radiation codes with high resolution models has documented the improved radiative forcing capability provided by RRTMG, especially at the surface, relative to other GCM radiation models. Due to its high accuracy, its connection to observations, and its computational efficiency, RRTMG has been implemented operationally in many national and international dynamical models to provide validated radiative transfer for improving weather forecasts and enhancing the prediction of global climate change.

  7. Upward Shift of the Atmospheric General Circulation under Global Warming: Theory and Simulations

    E-Print Network [OSTI]

    Singh, Martin Simran

    Many features of the general circulation of the atmosphere shift upward in response to warming in simulations of climate change with both general circulation models (GCMs) and cloud-system-resolving models. The importance ...

  8. ResearchNews Please circulate to

    E-Print Network [OSTI]

    Anderson, Paul R.

    invention disclosures (15% of the WFU total) named at least one Reynolda campus inventor, and 3 provisional helps to fund the research of inventor Errin Fulp, Computer Science. On September 1, the Reynolda campus

  9. ResearchNews Please circulate to

    E-Print Network [OSTI]

    Anderson, Paul R.

    to the Department of Energy; and $50 million to the National Endowment for the Arts. These stimulus funds must-003.html) Department of Defense: www.defenselink.mil/ recovery/--$300M to develop energy of Energy: www.energy.gov/recovery/-- Investments in building and renovating laboratories and research

  10. Solving Problems with GCMs: General Circulation Models and Their Role in the Climate Modeling Hierarchy

    E-Print Network [OSTI]

    Robertson, Andrew W.

    Solving Problems with GCMs: General Circulation Models and Their Role in the Climate Modeling of a hierarchy of models for solving problems in climate dynamics. General circulation models (GCMs) occupy, capture all the phenomena, and solve all the problems. Hence the concept of a hierarchy of climate models

  11. On the Wind Power Input to the Ocean General Circulation XIAOMING ZHAI

    E-Print Network [OSTI]

    Wunsch, Carl

    On the Wind Power Input to the Ocean General Circulation XIAOMING ZHAI Atmospheric, Oceanic January 2012, in final form 3 May 2012) ABSTRACT The wind power input to the ocean general circulation is usually calculated from the time-averaged wind products. Here, this wind power input is reexamined using

  12. The Importance of Mesoscale Circulations Generated by SubgridScale Landscape Heterogeneities in General Circulations Models

    E-Print Network [OSTI]

    Fridlind, Ann

    jcl92c.tex The Importance of Mesoscale Circulations Generated by Subgrid­Scale Landscape Oceanography, Cook Campus, Rutgers University, New Brunswick, NJ 08903, USA. #12; Abstract A mesoscale. These results emphasize the need to parameterize mesoscale processes induced by landscape discontinuities

  13. MPO 665: General Circulation of the Atmosphere Spring 2007

    E-Print Network [OSTI]

    Miami, University of

    : dnolan@rsmas.miami.edu; phone: 305-421-4930 MSC 329, Mondays and Wednesdays, 10:40-12:10 Topics: I Circulation A. Radiation, temperature, pressure, winds, moisture B. The oceans, land, ice, and their effects C climate models B. Hadley cell models C. First look at wave and eddy transports D. Zonally averaged heat

  14. Climatic variations of the work done by the wind on the ocean's general circulation

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Climatic variations of the work done by the wind on the ocean's general circulation J. M for the deep overturning circulation. In a coarse-resolution ocean model, northward-shifted winds increase Circumpolar Current (ACC). Alternatively, energy supply is diminished by southward-shifted winds, primarily

  15. Electrodynamic effects of thermospheric winds from the NCAR thermospheric general circulation model

    SciTech Connect (OSTI)

    Richmond, A.D.; Roble, R.G.

    1987-11-01

    The ionospheric electric fields and currents and the associated ground magnetic variations, generated by the dynamo action of winds simulated with the National Center for Atmospheric Research, Boulder, Colo. (NCAR) Thermospheric General Circulation Model (TGCM), are modelled and compared with observations for equinox solar minimum conditions. The dynamo model uses a tilted dipole geomagnetic field and allows for field-aligned current flow between conjugate points, but no magnetospheric dynamo effects are included. Two TGCM wind simulations are used, one of which is driven only by in situ solar ultraviolet heating and the other of which includes lower boundary forcing that mimics the effects of upward propagating semidiurnal tides, as described by Fesen et al. (1986). Without tidal forcing, the TGCM winds produce ground magnetic variations that have the general pattern of observed Sq variations but are only about half as strong.

  16. 1950 B i M d l 1960 General Circulation

    E-Print Network [OSTI]

    Rannacher, Rolf

    AFA 2001 TAR 2000 Earth System Models (ESMs) 2014 ARS Climate Research Meteo- rology Climate Change Atmosphere Ocean Models (AOGCMs) 1979 Charney Report 1990 FAR 1995 SAR 2007 AFA 2001 TAR 2000 Earth System Models (ESMs) 2014 ARS Climate Research Meteo- rology Climate Change Science and Policy 1 Cl Re Meteo

  17. The Mars thermosphere. 2. General circulation with coupled dynamics and composition

    SciTech Connect (OSTI)

    Bougher, S.W. (Univ. of Arizona, Tucson (USA)); Roble, R.G.; Ridley, E.C.; Dickinson, R.E. (National Center for Atmospheric Research, Boulder, CO (USA))

    1990-08-30

    The National Center for Atmospheric Research thermospheric general circulation model (TGCM) for the Earth's thermosphere has been modified to examine the three-dimensional structure and circulation of the upper mesosphere and thermosphere of Mars (MTGCM). The computational framework and major processes unique to a CO{sub 2} thermosphere are similar to those utilized in a recent Venus TGCM. Solar EUV, UV, and IR heating alone combine to drive the Martian winds above {approximately}100 km. An equinox version of the code is used to examine the Mars global dynamics and structure for two specific observational periods spanning a range of solar activity: Viking 1 (July 1976) and Mariner 6-7 (August-September 1969). The MTGCM is then modified to predict the state of the Mars thermosphere for various combinations of solar and orbital conditions. Calculations show that no nightside cryosphere of the type observed on Venus is obtained on the Mars nightside. Instead, planetary rotation significantly modifies the winds and the day-to-night contrast in densities and temperatures, giving a diurnal behavior similar to the Earth under quiet solar conditions. Maximum exospheric temperatures are calculated near 1,500 LT ({le} 305 K), with minimum values at 0500 LT ({le} 175 K). The global temperature distribution is strongly modified by nightside adiabatic heating (subsidence) and dayside cooling (upwelling). The global winds also affect vertical density distributions; vertical eddy diffusion much weaker than used in previous one-dimensional models is required to maintain observed Viking profiles. A solar cycle variation in dayside exospheric temperatures of {approximately}195-305 K is simulated by the Viking and Mariner runs.

  18. Estimates of the Southern Ocean general circulation improved by animal-borne instruments

    E-Print Network [OSTI]

    Wunsch, Carl

    of the Southern Ocean have become available through the use of instrumented seals. ConductivityEstimates of the Southern Ocean general circulation improved by animal-borne instruments Fabien collection of seal-derived hydrographic data is now available, consisting of more than 165,000 profiles

  19. Extension of a Martian general circulation model to thermospheric altitudes: UV heating

    E-Print Network [OSTI]

    Forget, François

    Extension of a Martian general circulation model to thermospheric altitudes: UV heating altitudes: UV heating and photochemical models, J. Geophys. Res., 110, E09008, doi:10.1029/2004JE002312. 1. Introduction [2] New modeling efforts and new data from spacecraft instrumentation are two relevant topics

  20. The Effect of Topography on Storm-Track Intensity in a Relatively Simple General Circulation Model

    E-Print Network [OSTI]

    Son, Seok-Woo

    The Effect of Topography on Storm-Track Intensity in a Relatively Simple General Circulation Model The effect of topography on storm-track intensity is examined with a set of primitive equation model flow impinging on the topography. If the background flow consists of a weak double jet, higher

  1. Ocean mixed layer processes in the Pacific Decadal Oscillation in coupled general circulation models

    E-Print Network [OSTI]

    Qiu, Bo

    Ocean mixed layer processes in the Pacific Decadal Oscillation in coupled general circulation to be larger for CGCMs with a larger ocean heat transport in the region. Keywords Pacific Decadal Oscillation Á. 1994a, b; Zhanget al. 1996), ocean-atmosphere interactions over the North Pacific (e.g., Latif

  2. Selected translated abstracts of Russian-language climate-change publications. 4: General circulation models

    SciTech Connect (OSTI)

    Burtis, M.D.; Razuvaev, V.N.; Sivachok, S.G.

    1996-10-01

    This report presents English-translated abstracts of important Russian-language literature concerning general circulation models as they relate to climate change. Into addition to the bibliographic citations and abstracts translated into English, this report presents the original citations and abstracts in Russian. Author and title indexes are included to assist the reader in locating abstracts of particular interest.

  3. Impact Assessment of Satellite-Derived Leaf Area Index Datasets Using a General Circulation Model

    E-Print Network [OSTI]

    Xue, Yongkang

    Impact Assessment of Satellite-Derived Leaf Area Index Datasets Using a General Circulation Model the impact of two different remote sensing­derived leaf area index (RSLAI) datasets retrieved from the same using the RSLAI and other satellite-derived land surface products showed sub- stantial improvements

  4. Investigating the ability of general circulation models to capture the effects of Eurasian snow cover on winter climate

    E-Print Network [OSTI]

    Investigating the ability of general circulation models to capture the effects of Eurasian snow of general circulation models (GCMs) to reproduce the observed strong correlations of Eurasian snow extent in the troposphere in response to snow-forced surface cooling and a coupled zonal-mean stratosphere

  5. Enhancing the resolution of sea ice in long-term global ocean general circulation model (gcm) integrations 

    E-Print Network [OSTI]

    Kim, Joong Tae

    2007-09-17

    Open water in sea ice, such as leads and polynyas, plays a crucial role in determining the formation of deep- and bottom-water, as well as their long-term global properties and circulation. Ocean general circulation models (GCMs) designed...

  6. Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model

    E-Print Network [OSTI]

    Thornton, P. E.; Doney, S. C.; Lindsay, Keith; Moore, J. K.; Mahowald, N. M.; Randerson, J. T.; Fung, I.; Lamarque, J. F.; Feddema, Johannes J.

    2009-01-01

    Abstract. Inclusion of fundamental ecological interactions between carbon and nitrogen cycles in the land component of an atmosphere-ocean general circulation model (AOGCM) leads to decreased carbon uptake associated ...

  7. RESEARCH ARTICLE Open Access Alteration in circulating metabolites during and

    E-Print Network [OSTI]

    cycle/creatinine metabolism), energetics (stasis in glycolysis and tricarboxylic acid cycle, -oxidation for Environmental Health Research, Environmental Health Program, Bldg. 568 Doughten Drive, Fort Detrick, Frederick

  8. Improving Groundwater Predictions Utilizing Seasonal Precipitation Forecasts from General Circulation Models

    E-Print Network [OSTI]

    Arumugam, Sankar

    Improving Groundwater Predictions Utilizing Seasonal Precipitation Forecasts from General. The research reported in this paper evaluates the potential in developing 6-month-ahead groundwater Surface Temperature forecasts. Ten groundwater wells and nine streamgauges from the USGS Groundwater

  9. Power-Law and Long-Memory Characteristics of the Atmospheric General Circulation DMITRY I. VYUSHIN AND PAUL J. KUSHNER

    E-Print Network [OSTI]

    Power-Law and Long-Memory Characteristics of the Atmospheric General Circulation DMITRY I. VYUSHIN memory'' or ``power-law'' model. Such a model fits a temporal spectrum to a single power-law function, which thereby accumulates more power at lower frequencies than an AR1 fit. In this study, several power

  10. Passive tracers in a general circulation model of the Southern Ocean I. G. Stevens, D. P. Stevens

    E-Print Network [OSTI]

    Stevens, David

    Passive tracers in a general circulation model of the Southern Ocean I. G. Stevens, D. P. Stevens: 22 January 1999 / Accepted: 12 February 1999 Abstract. Passive tracers are used in an o-line version and provide information on the inter-ocean exchange of water masses. The use of passive tracers allows

  11. Ocean Water Clarity and the Ocean General Circulation in a Coupled Climate Model ANAND GNANADESIKAN AND WHIT G. ANDERSON

    E-Print Network [OSTI]

    Gnanadesikan, Anand

    shortwave penetration in the high-latitude Southern Ocean causes an increase in the formation of mode waterOcean Water Clarity and the Ocean General Circulation in a Coupled Climate Model ANAND GNANADESIKAN Jersey (Manuscript received 11 October 2007, in final form 17 July 2008) ABSTRACT Ocean water clarity

  12. Convective Precipitation Variability as a Tool for General Circulation Model Analysis CHARLOTTE A. DEMOTT, DAVID A. RANDALL, AND MARAT KHAIROUTDINOV

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Convective Precipitation Variability as a Tool for General Circulation Model Analysis CHARLOTTE A Precipitation variability is analyzed in two versions of the Community Atmospheric Model (CAM), the standard rainfall as soon as the boundary layer energizes. Precipitation is also concurrent with tropospheric

  13. Evaluating Parameterizations in General Circulation Models: Climate Simulation Meets Weather Prediction

    SciTech Connect (OSTI)

    Phillips, T J; Potter, G L; Williamson, D L; Cederwall, R T; Boyle, J S; Fiorino, M; Hnilo, J J; Olson, J G; Xie, S; Yio, J J

    2004-05-06

    To significantly improve the simulation of climate by general circulation models (GCMs), systematic errors in representations of relevant processes must first be identified, and then reduced. This endeavor demands that the GCM parameterizations of unresolved processes, in particular, should be tested over a wide range of time scales, not just in climate simulations. Thus, a numerical weather prediction (NWP) methodology for evaluating model parameterizations and gaining insights into their behavior may prove useful, provided that suitable adaptations are made for implementation in climate GCMs. This method entails the generation of short-range weather forecasts by a realistically initialized climate GCM, and the application of six-hourly NWP analyses and observations of parameterized variables to evaluate these forecasts. The behavior of the parameterizations in such a weather-forecasting framework can provide insights on how these schemes might be improved, and modified parameterizations then can be tested in the same framework. In order to further this method for evaluating and analyzing parameterizations in climate GCMs, the U.S. Department of Energy is funding a joint venture of its Climate Change Prediction Program (CCPP) and Atmospheric Radiation Measurement (ARM) Program: the CCPP-ARM Parameterization Testbed (CAPT). This article elaborates the scientific rationale for CAPT, discusses technical aspects of its methodology, and presents examples of its implementation in a representative climate GCM.

  14. A comparison of general circulation model predictions to sand drift and dune orientations

    SciTech Connect (OSTI)

    Blumberg, D.G.; Greeley, R.

    1996-12-01

    The growing concern over climate change and decertification stresses the importance of aeolian process prediction. In this paper the use of a general circulation model to predict current aeolian features is examined. A GCM developed at NASA/Goddard Space Flight Center was used in conjunction with White`s aeolian sand flux model to produce a global potential aeolian transport map. Surface wind shear stress predictions were used from the output of a GCM simulation that was performed as part of the Atmospheric Model Intercomparison Project on 1979 climate conditions. The spatial resolution of this study (as driven by the GCM) is 4{degrees} X 5{degrees}; instantaneous 6-hourly wind stress data were saved by the GCM and used in this report. A global map showing potential sand transport was compared to drift potential directions as inferred from Landsat images from the 1980s for several sand seas and a coastal dune field. Generally, results show a good correlation between the simulated sand drift direction and the drift direction inferred for dune forms. Discrepancies between the drift potential and the drift inferred from images were found in the North American deserts and the Arabian peninsula. An attempt to predict the type of dune that would be formed in specific regions was not successful. The model could probably be further improved by incorporating soil moisture, surface roughness, and vegetation information for a better assessment of sand threshold conditions. The correlation may permit use of a GCM to analyze {open_quotes}fossil{close_quotes} dunes or to forecast aeolian processes. 48 refs., 8 figs.

  15. An assessment of possible climate change in the Australian region based on intercomparison of general circulation modeling results

    SciTech Connect (OSTI)

    Whetton, P.H.; Pittock, A.B.; Haylock, M.R. ); Rayner, P.J. )

    1994-03-01

    To assist in estimating likely future climate change in the Australian region, the authors examine the results of four different general circulation modeling experiments run to assess the equilibrium impact of doubling greenhouse gases. The results examined were the most recent available at the time of study from various research centers in North America and Europe, as well as those of the Commonwealth Scientific and Industrial Research Organisation (CSIRO). The approach used is, first, to assess the quality of the control (1 x CO[sub 2]) simulations from each of the models of mean sea level (MSL) pressure and precipitation in the Australian region by comparing these with the corresponding observed patterns; and, second, to then analyze the 2 x CO[sub 2] results of only those model experiments with the best control simulations. Of the models examined two are chosen on the basis of their simulation of current climate in the region: the CSIRO four-level model (CSIRO4) and the United Kingdom Meteorological Office (UKMO) model. For conditions of equivalent doubling of CO[sub 2], both models show substantial increases in surface air temperature of around 4[degrees]-6[degrees] inland and 2[degrees]-4[degrees]C in coastal regions. Both models show decreased MSL pressure over the Australian continent and increases in rainfall over northern, central, and eastern Australia, particularly in the summer half of the year. The CSIRO4 model, but not the UKMO model, also shows increased pressure to the south of the continent and decreased winter rainfall in southwest and southern Australia. Generally, field significance tests show the pattern and magnitude of the changes to be significant of CSIRO4 (for which the necessary monthly simulated data were available). 42 refs., 20 figs., 5 tabs.

  16. Forced and free variations of the surface temperature field in a general circulation model

    SciTech Connect (OSTI)

    North, G.R.; Yip, K.J.J.; Laiyung Leung (Texas A M Univ., College Station (United States)); Chervin, R.M. (National Center for Atmospheric Research, Boulder, CO (United States))

    1992-03-01

    The concept of forced' and free' variations of large-scale surface temperature is examined by analyzing several long runs of the Community Climate Model (CCM0) with idealized boundary conditions and forcing. (1) The planet is all land with uniform sea-level topography and fixed soil moisture. (2) The planetary surface and prescribed ozone are reflection symmetric across the equator and there is no generation of snow. (3) The obliquity is set to zero so that the climate is for a perpetual equinox solar insolation (i.e., sun fixed over the equator). After examining some relevant aspects of the undisturbed climate (surface temperature field) such as temporal and spatial autocorrelations and the corresponding spectra, two types of changes in external forcing are imposed to study the model response: (1) sinusoidal changes of the solar constant (5%, 10%, 20%, and 40% amplitudes) at periods of 15 and 30 days (the latter is the autocorrelation time for the global average surface temperature) and 20% at 60 days and (2) insertion of steady heat sources (points and zonal bands) of variable strength at the surface. Then the temporal spectra of large scales for the periodically forced climate and the ensemble-averaged influence functions are examined for the point source disturbed climates. In each class of experiments the response of ensemble-averaged amplitudes was found to be proportional to the amplitude of the forcing. These results suggest that the lowest moments of the surface temperature field have a particularly simple dependence on forcing. Furthermore, the apparent finiteness of the variance spectrum at low frequencies suggest that estimates of long-term statistics are stable in this type of atmospheric general circulation model. 31 refs., 17 figs.

  17. Short ensembles: An Efficient Method for Discerning Climate-relevant Sensitivities in Atmospheric General Circulation Models

    SciTech Connect (OSTI)

    Wan, Hui; Rasch, Philip J.; Zhang, Kai; Qian, Yun; Yan, Huiping; Zhao, Chun

    2014-09-08

    This paper explores the feasibility of an experimentation strategy for investigating sensitivities in fast components of atmospheric general circulation models. The basic idea is to replace the traditional serial-in-time long-term climate integrations by representative ensembles of shorter simulations. The key advantage of the proposed method lies in its efficiency: since fewer days of simulation are needed, the computational cost is less, and because individual realizations are independent and can be integrated simultaneously, the new dimension of parallelism can dramatically reduce the turnaround time in benchmark tests, sensitivities studies, and model tuning exercises. The strategy is not appropriate for exploring sensitivity of all model features, but it is very effective in many situations. Two examples are presented using the Community Atmosphere Model version 5. The first example demonstrates that the method is capable of characterizing the model cloud and precipitation sensitivity to time step length. A nudging technique is also applied to an additional set of simulations to help understand the contribution of physics-dynamics interaction to the detected time step sensitivity. In the second example, multiple empirical parameters related to cloud microphysics and aerosol lifecycle are perturbed simultaneously in order to explore which parameters have the largest impact on the simulated global mean top-of-atmosphere radiation balance. Results show that in both examples, short ensembles are able to correctly reproduce the main signals of model sensitivities revealed by traditional long-term climate simulations for fast processes in the climate system. The efficiency of the ensemble method makes it particularly useful for the development of high-resolution, costly and complex climate models.

  18. Aerosol indirect effects -- general circulation model intercomparison and evaluation with satellite data

    SciTech Connect (OSTI)

    Quaas, Johannes; Ming, Yi; Menon, Surabi; Takemura, Toshihiko; Wang, Minghuai; Penner, Joyce E.; Gettelman, Andrew; Lohmann, Ulrike; Bellouin, Nicolas; Boucher, Olivier; Sayer, Andrew M.; Thomas, Gareth E.; McComiskey, Allison; Feingold, Graham; Hoose, Corinna; Kristjansson, Jon Egill; Liu, Xiaohong; Balkanski, Yves; Donner, Leo J.; Ginoux, Paul A.; Stier, Philip; Feichter, Johann; Sednev, Igor; Bauer, Susanne E.; Koch, Dorothy; Grainger, Roy G.; Kirkevag, Alf; Iversen, Trond; Seland, Oyvind; Easter, Richard; Ghan, Steven J.; Rasch, Philip J.; Morrison, Hugh; Lamarque, Jean-Francois; Iacono, Michael J.; Kinne, Stefan; Schulz, Michael

    2009-04-10

    Aerosol indirect effects continue to constitute one of the most important uncertainties for anthropogenic climate perturbations. Within the international AEROCOM initiative, the representation of aerosol-cloud-radiation interactions in ten different general circulation models (GCMs) is evaluated using three satellite datasets. The focus is on stratiform liquid water clouds since most GCMs do not include ice nucleation effects, and none of the model explicitly parameterizes aerosol effects on convective clouds. We compute statistical relationships between aerosol optical depth (Ta) and various cloud and radiation quantities in a manner that is consistent between the models and the satellite data. It is found that the model-simulated influence of aerosols on cloud droplet number concentration (Nd) compares relatively well to the satellite data at least over the ocean. The relationship between Ta and liquid water path is simulated much too strongly by the models. It is shown that this is partly related to the representation of the second aerosol indirect effect in terms of autoconversion. A positive relationship between total cloud fraction (fcld) and Ta as found in the satellite data is simulated by the majority of the models, albeit less strongly than that in the satellite data in most of them. In a discussion of the hypotheses proposed in the literature to explain the satellite-derived strong fcld - Ta relationship, our results indicate that none can be identified as unique explanation. Relationships similar to the ones found in satellite data between Ta and cloud top temperature or outgoing long-wave radiation (OLR) are simulated by only a few GCMs. The GCMs that simulate a negative OLR - Ta relationship show a strong positive correlation between Ta and fcld The short-wave total aerosol radiative forcing as simulated by the GCMs is strongly influenced by the simulated anthropogenic fraction of Ta, and parameterisation assumptions such as a lower bound on Nd. Nevertheless, the strengths of the statistical relationships are good predictors for the aerosol forcings in the models. An estimate of the total short-wave aerosol forcing inferred from the combination of these predictors for the modelled forcings with the satellite-derived statistical relationships yields a global annual mean value of -1.5+-0.5 Wm-2. An alternative estimate obtained by scaling the simulated clear- and cloudy-sky forcings with estimates of anthropogenic Ta and satellite-retrieved Nd - Ta regression slopes, respectively, yields a global annual mean clear-sky (aerosol direct effect) estimate of -0.4+-0.2 Wm-2 and a cloudy-sky (aerosol indirect effect) estimate of -0.7+-0.5 Wm-2, with a total estimate of -1.2+-0.4 Wm-2.

  19. Support of Publication Costs, Atlantic Meridional Overturning Circulation Special Issue of Deep Sea Research II Journal

    SciTech Connect (OSTI)

    Amy Honchar

    2012-11-12

    The contribution of funds from DOE supported publication costs of a special issue of Deep Sea Research arising from presentations at the First U.S. Atlantic Meridional Overturning Circulation (AMOC) Meeting held 4-6 May, 2009 to review the US implementation plan and its coordination with other monitoring activities. The special issue includes a total of 16 papers, including publications from three DOE-supported investigators (ie Sevellec, F., and A.V. Fedorov; Hu et. al., and Wan et. al.,). The special issue addresses DOE interests in understanding and simulation/modeling of abrupt climate change.

  20. A study of longwave radiation codes for climate studies: Validation with ARM observations and tests in general circulation models. Final report, September 15, 1990--October 31, 1994

    SciTech Connect (OSTI)

    Ellingson, R.G.; Baer, F.

    1998-09-01

    DOE has launched a major initiative -- the Atmospheric Radiation Measurements (ARM) Program -- directed at improving the parameterization of the physics governing cloud and radiative processes in general circulation models (GCMs). One specific goal of ARM is to improve the treatment of radiative transfer in GCMs under clear-sky, general overcast and broken cloud conditions. In 1990, the authors proposed to contribute to this goal by attacking major problems connected with one of the dominant radiation components of the problem -- longwave radiation. In particular, their long-term research goals are to: develop an optimum longwave radiation model for use in GCMs that has been calibrated with state-of-the-art observations, assess the impact of the longwave radiative forcing in a GCM, determine the sensitivity of a GCM to the radiative model used in it, and determine how the longwave radiative forcing contributes relatively when compared to shortwave radiative forcing, sensible heating, thermal advection and expansion.

  1. Aerosol indirect effects ? general circulation model intercomparison and evaluation with satellite data

    SciTech Connect (OSTI)

    Quaas, Johannes; Ming, Yi; Menon, Surabi; Takemura, Toshihiko; Wang, Minghuai; Penner, Joyce E.; Gettelman, Andrew; Lohmann, Ulrike; Bellouin, Nicolas; Boucher, Olivier; Sayer, Andrew M.; Thomas, Gareth E.; McComiskey, Allison; Feingold, Graham; Hoose, Corinna; Kristansson, Jon Egill; Liu, Xiaohong; Balkanski, Yves; Donner, Leo J.; Ginoux, Paul A.; Stier, Philip; Grandey, Benjamin; Feichter, Johann; Sednev, Igor; Bauer, Susanne E.; Koch, Dorothy; Grainger, Roy G.; Kirkevag, Alf; Iversen, Trond; Seland, Oyvind; Easter, Richard; Ghan, Steven J.; Rasch, Philip J.; Morrison, Hugh; Lamarque, Jean-Francois; Iacono, Michael J.; Kinne, Stefan; Schulz, Michael

    2010-03-12

    Aerosol indirect effects continue to constitute one of the most important uncertainties for anthropogenic climate perturbations. Within the international AEROCOM initiative, the representation of aerosol-cloud-radiation interactions in ten different general circulation models (GCMs) is evaluated using three satellite datasets. The focus is on stratiform liquid water clouds since most GCMs do not include ice nucleation effects, and none of the model explicitly parameterises aerosol effects on convective clouds. We compute statistical relationships between aerosol optical depth ({tau}{sub a}) and various cloud and radiation quantities in a manner that is consistent between the models and the satellite data. It is found that the model-simulated influence of aerosols on cloud droplet number concentration (N{sub d}) compares relatively well to the satellite data at least over the ocean. The relationship between {tau}{sub a} and liquid water path is simulated much too strongly by the models. This suggests that the implementation of the second aerosol indirect effect mainly in terms of an autoconversion parameterisation has to be revisited in the GCMs. A positive relationship between total cloud fraction (f{sub cld}) and {tau}{sub a} as found in the satellite data is simulated by the majority of the models, albeit less strongly than that in the satellite data in most of them. In a discussion of the hypotheses proposed in the literature to explain the satellite-derived strong f{sub cld} - {tau}{sub a} relationship, our results indicate that none can be identified as a unique explanation. Relationships similar to the ones found in satellite data between {tau}{sub a} and cloud top temperature or outgoing long-wave radiation (OLR) are simulated by only a few GCMs. The GCMs that simulate a negative OLR - {tau}{sub a} relationship show a strong positive correlation between {tau}{sub a} and f{sub cld} The short-wave total aerosol radiative forcing as simulated by the GCMs is strongly influenced by the simulated anthropogenic fraction of {tau}{sub a}, and parameterization assumptions such as a lower bound on N{sub d}. Nevertheless, the strengths of the statistical relationships are good predictors for the aerosol forcings in the models. An estimate of the total short-wave aerosol forcing inferred from the combination of these predictors for the modelled forcings with the satellite-derived statistical relationships yields a global annual mean value of -1.5 {+-} 0.5 Wm{sup -2}. In an alternative approach, the radiative flux perturbation due to anthropogenic aerosols can be broken down into a component over the cloud-free portion of the globe (approximately the aerosol direct effect) and a component over the cloudy portion of the globe (approximately the aerosol indirect effect). An estimate obtained by scaling these simulated clear- and cloudy-sky forcings with estimates of anthropogenic {tau}{sub a} and satellite-retrieved Nd - {tau}{sub a} regression slopes, respectively, yields a global, annual-mean aerosol direct effect estimate of -0.4 {+-} 0.2 Wm{sup -2} and a cloudy-sky (aerosol indirect effect) estimate of -0.7 {+-} 0.5 Wm{sup -2}, with a total estimate of -1.2 {+-} 0.4 Wm{sup -2}.

  2. Adjusting to policy expectations in climate change modeling : an interdiciplinary study of flux adjustments in coupled atmosphere-ocean general circulation models

    E-Print Network [OSTI]

    Shackley, Simon.; Risbey, James; Stone, Peter H.; Wynne, Brian

    This paper surveys and interprets the attitudes of scientists to the use of flux adjustments in climate projections with coupled Atmosphere Ocean General Circulation Models. The survey is based largely on the responses of ...

  3. A 3D general circulation model for Pluto and Triton with fixed volatile abundance and simplified surface forcing

    E-Print Network [OSTI]

    Zalucha, Angela

    2012-01-01

    We present a 3D general circulation model of Pluto and Triton's atmospheres, which uses radiative-conductive-convective forcing. In both the Pluto and Triton models, an easterly (prograde) jet is present at the equator with a maximum magnitude of 10-12 m/s and 4 m/s, respectively. Neither atmosphere shows any significant overturning circulation in the meridional and vertical directions. Rather, it is horizontal motions (mean circulation and transient waves) that transport heat meridionally at a magnitude of 1 and 3 x 10^7 W at Pluto's autumn equinox and winter solstice, respectively (seasons referenced to the Northern Hemisphere). The meridional and dayside-nightside temperature contrast is small (<5 K). We find that the lack of vertical motion can be explained on Pluto by the strong temperature inversion in the lower atmosphere. The height of the Voyager 2 plumes on Triton can be explained by the dynamical properties of the lower atmosphere alone (i.e., strong wind shear) and does not require a thermally ...

  4. Prognostic residual mean flow in an ocean general circulation model and its relation to prognostic Eulerian mean flow

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

    Saenz, Juan A.; Chen, Qingshan; Ringler, Todd

    2015-05-19

    Recent work has shown that taking the thickness-weighted average (TWA) of the Boussinesq equations in buoyancy coordinates results in exact equations governing the prognostic residual mean flow where eddy–mean flow interactions appear in the horizontal momentum equations as the divergence of the Eliassen–Palm flux tensor (EPFT). It has been proposed that, given the mathematical tractability of the TWA equations, the physical interpretation of the EPFT, and its relation to potential vorticity fluxes, the TWA is an appropriate framework for modeling ocean circulation with parameterized eddies. The authors test the feasibility of this proposition and investigate the connections between the TWAmore »framework and the conventional framework used in models, where Eulerian mean flow prognostic variables are solved for. Using the TWA framework as a starting point, this study explores the well-known connections between vertical transfer of horizontal momentum by eddy form drag and eddy overturning by the bolus velocity, used by Greatbatch and Lamb and Gent and McWilliams to parameterize eddies. After implementing the TWA framework in an ocean general circulation model, we verify our analysis by comparing the flows in an idealized Southern Ocean configuration simulated using the TWA and conventional frameworks with the same mesoscale eddy parameterization.« less

  5. A global view of gravity waves in the Martian atmosphere inferred from a high-resolution general circulation model

    E-Print Network [OSTI]

    Kuroda, Takeshi; Yi?it, Erdal; Hartogh, Paul

    2015-01-01

    Global characteristics of the small-scale gravity wave (GW) field in the Martian atmosphere obtained from a high-resolution general circulation model (GCM) are presented for the first time. The simulated GW-induced temperature variances are in a good agreement with available radio occultation data in the lower atmosphere between 10 and 30 km. The model reveals a latitudinal asymmetry with stronger wave generation in the winter hemisphere, and two distinctive sources of GWs: mountainous regions and the meandering winter polar jet. Orographic GWs are filtered while propagating upward, and the mesosphere is primarily dominated by harmonics with faster horizontal phase velocities. Wave fluxes are directed mainly against the local wind. GW dissipation in the upper mesosphere generates body forces of tens of m~s$^{-1}$~sol$^{-1}$, which tend to close the simulated jets. The results represent a realistic surrogate for missing observations, which can be used for constraining GW parameterizations and validating GCM si...

  6. USE OF GENERAL CIRCULATION MODEL OUTPUT IN THE CREATION OF CLIMATE CHANGE SCENARIOS

    E-Print Network [OSTI]

    Robock, Alan

    , Sub-Saharan Africa and Venezuela, for use in biological effects models. By combining the general, and possible solar variations, and all agree that surface air temperatures will rise, pre- cipitation patterns will change, and sea level will rise. Even though such projections of the future are relatively crude

  7. Interdisciplinary: Research General Engineer/Physical Scientist

    Broader source: Energy.gov [DOE]

    *1 Position exists that may be filled at Albany, Oregon or Morgantown, WV. The position is located in the Science & Technology Strategic Plans & Programs (STSPP), Research and Innovation...

  8. A Study of Longwave Radiation Codes for Climate Studies: Validation with ARM Observations and Tests in General Circulation Models

    SciTech Connect (OSTI)

    Robert G. Ellingson

    2004-09-28

    One specific goal of the Atmospheric Radiation Measurements (ARM) program is to improve the treatment of radiative transfer in General Circulation Models (GCMs) under clear-sky, general overcast and broken cloud conditions. Our project was geared to contribute to this goal by attacking major problems associated with one of the dominant radiation components of the problem --longwave radiation. The primary long-term project objectives were to: (1) develop an optimum longwave radiation model for use in GCMs that has been calibrated with state-of-the-art observations for clear and cloudy conditions, and (2) determine how the longwave radiative forcing with an improved algorithm contributes relatively in a GCM when compared to shortwave radiative forcing, sensible heating, thermal advection and convection. The approach has been to build upon existing models in an iterative, predictive fashion. We focused on comparing calculations from a set of models with operationally observed data for clear, overcast and broken cloud conditions. The differences found through the comparisons and physical insights have been used to develop new models, most of which have been tested with new data. Our initial GCM studies used existing GCMs to study the climate model-radiation sensitivity problem. Although this portion of our initial plans was curtailed midway through the project, we anticipate that the eventual outcome of this approach will provide both a better longwave radiative forcing algorithm and from our better understanding of how longwave radiative forcing influences the model equilibrium climate, how improvements in climate prediction using this algorithm can be achieved.

  9. Interdisciplinary: Research General Engineer/Physical Scientist

    Broader source: Energy.gov [DOE]

    This position is located in the Computational Science and Engineering Division (CS&ED;), Office of Research and Development (ORD), NETL. The function of this Division is to (1) conceive, plan,...

  10. Interdisciplinary: Research General Engineer/Physical Scientist

    Broader source: Energy.gov [DOE]

    *1 Position exists that may be filled at Morgantown, WV or Pittsburgh, PA. This position is located in the Energy Process Innovation Division of the Office of Research and Development (ORD). The...

  11. GENERAL CIRCULATION Energy Cycle

    E-Print Network [OSTI]

    Grotjahn, Richard

    process. PE is useful for global energy balance. Solar radiant energy does not reach the Earth equally static energy (DSE), while including the third defines moist static energy (MSE). Potential energy (PE) is usually defined as DSE. A tiny fraction of the PE, called the available potential energy, APE, can be used

  12. General Information | Photosynthetic Antenna Research Center

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities Nuclearlong version)shortGateGeneral

  13. DEEP SEA RESEARCH PART II Circulation in the Eastern Bering Sea: Inferences

    E-Print Network [OSTI]

    Kurapov, Alexander

    of Alaska coastal currents connect with the Bering Sea basin and shelf through narrow island passes35 of Alaska, Fairbanks, Alaska, 99775, USA 4 National Research Tomsk Polytechnic University, Tomsk, Russia of erosion of the water mass as the shelf warms and mixes. On the Bering Sea shelf, tidal motions

  14. A thermosphere-ionosphere-mesosphere-electrodynamics general circulation model (time-GCM): Equinox solar cycle minimum simulations (30-500 km)

    SciTech Connect (OSTI)

    Roble, R.G.; Ridley, E.C.

    1994-03-15

    A new simulation model of the mesosphere, thermosphere, and ionosphere with coupled electrodynamics has been developed and used to calculate the global circulation, temperature and compositional structure between 30-500 km for equinox, solar cycle minimum, geomagnetic quiet conditions. The model incorporates all of the features of the NCAR thermosphere-ionosphere-electrodynamics general circulation model (TIE-GCM) but the lower boundary has been extended downward from 97 to 30 km (10 mb) and it includes the physical and chemical processes appropriate for the mesosphere and upper stratosphere. The first simulation used Rayleigh friction to represent gravity wave drag in the middle atmosphere and although it was able to close the mesospheric jets it severely damped the diurnal tide. Reduced Rayleigh friction allowed the tide to penetrate to thermospheric heights but did not close the jets. A gravity wave parameterization developed by Fritts and Lu allows both features to exist simultaneously with the structure of tides and mean flow dependent upon the strength of the gravity wave source. The model calculates a changing dynamic structure with the mean flow and diurnal tide dominant in the mesosphere, the in-situ generated semi-diurnal tide dominating the lower thermosphere and an in-situ generated diurnal tide in the upper thermosphere. The results also show considerable interaction between dynamics and composition, especially atomic oxygen between 85 and 120 km. 31 refs., 3 figs.

  15. Use of ARM observations and numerical models to determine radiative and latent heating profiles of mesoscale convective systems for general circulation models

    SciTech Connect (OSTI)

    Tao, Wei-Kuo; Houze, Robert, A., Jr.; Zeng, Xiping

    2013-03-14

    This three-year project, in cooperation with Professor Bob Houze at University of Washington, has been successfully finished as planned. Both ARM (the Atmospheric Radiation Measurement Program) data and cloud-resolving model (CRM) simulations were used to identify the water budgets of clouds observed in two international field campaigns. The research results achieved shed light on several key processes of clouds in climate change (or general circulation models), which are summarized below. 1. Revealed the effect of mineral dust on mesoscale convective systems (MCSs) Two international field campaigns near a desert and a tropical coast provided unique data to drive and evaluate CRM simulations, which are TWP-ICE (the Tropical Warm Pool International Cloud Experiment) and AMMA (the African Monsoon Multidisciplinary Analysis). Studies of the two campaign data were contrasted, revealing that much mineral dust can bring about large MCSs via ice nucleation and clouds. This result was reported as a PI presentation in the 3rd ASR Science Team meeting held in Arlington, Virginia in March 2012. A paper on the studies was published in the Journal of the Atmospheric Sciences (Zeng et al. 2013). 2. Identified the effect of convective downdrafts on ice crystal concentration Using the large-scale forcing data from TWP-ICE, ARM-SGP (the Southern Great Plains) and other field campaigns, Goddard CRM simulations were carried out in comparison with radar and satellite observations. The comparison between model and observations revealed that convective downdrafts could increase ice crystal concentration by up to three or four orders, which is a key to quantitatively represent the indirect effects of ice nuclei, a kind of aerosol, on clouds and radiation in the Tropics. This result was published in the Journal of the Atmospheric Sciences (Zeng et al. 2011) and summarized in the DOE/ASR Research Highlights Summaries (see http://www.arm.gov/science/highlights/RMjY5/view). 3. Used radar observations to evaluate model simulations In cooperation with Profs. Bob Houze at University of Washington and Steven Rutledge at Colorado State University, numerical model results were evaluated with observations from W- and C-band radars and CloudSat/TRMM satellites. These studies exhibited some shortcomings of current numerical models, such as too little of thin anvil clouds, directing the future improvement of cloud microphysics parameterization in CRMs. Two papers of Powell et al (2012) and Zeng et al. (2013), summarizing these studies, were published in the Journal of the Atmospheric Sciences. 4. Analyzed the water budgets of MCSs Using ARM data from TWP-ICE, ARM-SGP and other field campaigns, the Goddard CRM simulations were carried out to analyze the water budgets of clouds from TWP-ICE and AMMA. The simulations generated a set of datasets on clouds and radiation, which are available http://cloud.gsfc.nasa.gov/. The cloud datasets were available for modelers and other researchers aiming to improve the representation of cloud processes in multi-scale modeling frameworks, GCMs and climate models. Special datasets, such as 3D cloud distributions every six minutes for TWP-ICE, were requested and generated for ARM/ASR investigators. Data server records show that 86,206 datasets were downloaded by 120 users between April of 2010 and January of 2012. 5. MMF simulations The Goddard MMF (multi-scale modeling framework) has been improved by coupling with the Goddard Land Information System (LIS) and the Goddard Earth Observing System Model, Version 5 (GOES5). It has also been optimized on NASA HEC supercomputers and can be run over 4000 CPUs. The improved MMF with high horizontal resolution (1 x 1 degree) is currently being applied to cases covering 2005 and 2006. The results show that the spatial distribution pattern of precipitation rate is well simulated by the MMF through comparisons with satellite retrievals from the CMOPRH and GPCP data sets. In addition, the MMF results were compared with three reanalyses (MERRA, ERA-Interim and CFSR). Although the MMF tends

  16. A study of longwave radiation codes for climate studies: Validation with ARM observations and tests in general circulation models. Technical report, 15 September 1990--25 April 1993

    SciTech Connect (OSTI)

    Ellingson, R.G.; Baer, F.

    1993-12-31

    This report summarizes the activities of our group to meet our stated objectives. The report is divided into sections entitled: Radiation Model Testing Activities, General Circulation Model Testing Activities, Science Team Activities, and Publications, Presentations and Meetings. The section on Science Team Activities summarizes our participation with the science team to further advance the observation and modeling programs. Appendix A lists graduate students supported, and post-doctoral appointments during the project. Reports on the activities during each of the first two years are included as Appendix B. Significant progress has been made in: determining the ability of line-by-line radiation models to calculate the downward longwave flux at the surface; determining the uncertainties in calculated the downwelling radiance and flux at the surface associated with the use of different proposed profiling techniques; intercomparing clear-sky radiance and flux observations with calculations from radiation codes from different climate models; determining the uncertainties associated with estimating N* from surface longwave flux observations; and determining the sensitivity of model calculations to different formulations of the effects of finite sized clouds.

  17. The northern wintertime divergence extrema at 200 hPa and surface cyclones as simulated in the AMIP integration of the ECMWF general circulation model

    SciTech Connect (OSTI)

    Boyle, J.S.

    1994-11-01

    Divergence and convergence centers at 200 hPa and mean sea level pressure (MSLP) cyclones were located every 6 hr for a 10-yr general circulation model (GCM) simulation with the ECMWF (Cycle 36) for the boreal winters from 1980 to 1988. The simulation used the observed monthly mean sea surface temperature (SST) for the decade. Analysis of the frequency, location, and strength of these centers and cyclones gives insight into the dynamical response of the model to the varying SST. The results indicate that (1) the model produces reasonable climatologies of upper-level divergence and MSLP cyclones; (2) the model distribution of anomalies of divergence and convergence centers and MSLP cyclones is consistent with observations for the 1982-83 and 1986-87 El Nifio events; (3) the tropical Indian Ocean is the region of greatest divergence activity and interannual variability in the model; (4) the variability of the divergence centers is greater than that of the convergence centers; (5) strong divergence centers occur chiefly over the ocean in the midlatitudes but are more land-based in the tropics, except in the Indian Ocean; and (6) locations of divergence and convergence centers can be a useful tool for the intercomparison of global atmospheric simulations.

  18. Research Ethics, some general principles 1. The primary responsibility for the ethical conduct of research lies with the

    E-Print Network [OSTI]

    Harman, Neal.A.

    1 Research Ethics, some general principles 1. The primary responsibility for the ethical conduct of research lies with the researcher. The researcher should consider their project design against standard ethical guidelines for the conduct of research (see below for links to relevant documents), in particular

  19. Ice shelf-ocean interactions in a general circulation model : melt-rate modulation due to mean flow and tidal currents

    E-Print Network [OSTI]

    Dansereau, Véronique

    2012-01-01

    Interactions between the ocean circulation in sub-ice shelf cavities and the overlying ice shelf have received considerable attention in the context of observed changes in flow speeds of marine ice sheets around Antarctica. ...

  20. 7 Tips for Communicating Your Research to a General Audience

    SciTech Connect (OSTI)

    Labios, Liezel AN

    2014-10-15

    This ~900-word article provides useful tips for scientists (especially early career scientists) to communicate their research.

  1. Reversing the Circulation of Magnetic Vortices

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

    at the ALS, researchers have shown for the first time how to use pulsed magnetic fields to reverse the circulation. Taming the Whirlwind Although magnetic vortices may seem...

  2. General Shape Grammar Interpreter for Intelligent Designs Generations Artificial Intelligence Research Institute

    E-Print Network [OSTI]

    Rodríguez, Inmaculada

    General Shape Grammar Interpreter for Intelligent Designs Generations T. Trescak Artificial@maia.ub.es M. Esteva Artificial Intelligence Research Institute Spanish Council for Scientific Research visualization and artificial intelligent technologies have motivated the evolution of traditional computer aided

  3. EUROPEAN COMMISSION Directorate-General for Research and Innovation

    E-Print Network [OSTI]

    Zhigilei, Leonid V.

    : http://ec.europa.eu/research/industrial_technologies/pdf/modelling-brochure_en.pdf Contact: Lula Rosso the ways... ModellinginFP7NMPProgramme Materialsprojects Third version Edited by Lula Rosso and Anne F de

  4. Accelerated simulation of passive tracers in ocean circulation models

    E-Print Network [OSTI]

    Khatiwala, Samar

    to be particularly powerful tools when combined with ocean general circulation models (GCMs). (See England and Maier's circulation, such as the poleward transport of heat, water mass transfor- mation and ventilation

  5. GEOPHYSICAL RESEARCH LETTERS, VOL. 39, L18604, 6 PP., 2012, DOI:10.1029/2012GL053099 Sensitivity of the ocean's deep overturning circulation to

    E-Print Network [OSTI]

    Stewart, Andrew

    of the MOC by providing a path for deep water masses to return to the surface. This article addresses of the ocean's deep overturning circulation to easterly Antarctic winds Andrew L. Stewart,1 and Andrew F. Thompson1 We investigate the sensitivity of the deep meridional overturning circulation (MOC

  6. Research Focus A general mechanism for decision-making in the

    E-Print Network [OSTI]

    Newsome, William

    Research Focus A general mechanism for decision-making in the human brain? Alan E. Rorie by flipping coins, rolling dice or drawing straws. Ideally, jurors attend carefully and equally to all sources-making in human subjects. Functional MRI data obtained while subjects categorized visual images suggest

  7. Use of ARM observations and numerical models to determine radiative and latent heating profiles of mesoscale convective systems for general circulation models

    SciTech Connect (OSTI)

    Houze, Jr., Robert A.

    2013-11-13

    We examined cloud radar data in monsoon climates, using cloud radars at Darwin in the Australian monsoon, on a ship in the Bay of Bengal in the South Asian monsoon, and at Niamey in the West African monsoon. We followed on with a more in-depth study of the continental MCSs over West Africa. We investigated whether the West African anvil clouds connected with squall line MCSs passing over the Niamey ARM site could be simulated in a numerical model by comparing the observed anvil clouds to anvil structures generated by the Weather Research and Forecasting (WRF) mesoscale model at high resolution using six different ice-phase microphysical schemes. We carried out further simulations with a cloud-resolving model forced by sounding network budgets over the Niamey region and over the northern Australian region. We have devoted some of the effort of this project to examining how well satellite data can determine the global breadth of the anvil cloud measurements obtained at the ARM ground sites. We next considered whether satellite data could be objectively analyzed to so that their large global measurement sets can be systematically related to the ARM measurements. Further differences were detailed between the land and ocean MCS anvil clouds by examining the interior structure of the anvils with the satellite-detected the CloudSat Cloud Profiling Radar (CPR). The satellite survey of anvil clouds in the Indo-Pacific region was continued to determine the role of MCSs in producing the cloud pattern associated with the MJO.

  8. Circulating Fluid Bed Combustor 

    E-Print Network [OSTI]

    Fraley, L. D.; Do, L. N.; Hsiao, K. H.

    1982-01-01

    The circulating bed combustor represents an alternative concept of burning coal in fluid bed technology, which offers distinct advantages over both the current conventional fluidized bed combustion system and the pulverized coal boilers equipped...

  9. Adaptive Grids for Atmospheric General Circulation Models

    E-Print Network [OSTI]

    Jablonowski, Christiane

    the wind speed OMEGA model Courtesy of A. Sarma (SAIC, NC, USA) #12;Two Adaptive Shallow Water Models AMR the vertical resolutions adds another factor of 2 We need to increase our computational power by a factor

  10. Generalized Min Cost Circulation Kevin Wayne

    E-Print Network [OSTI]

    Wayne, Kevin

    conversion, machine loading, fuel utilization, crop management, aircraft fleet assignment $40 £20$ £ = 1-cut theorem ­ no integrality theorem Kevin Wayne 5 #12;Problem History Kantorovich '39 dual simplex Dantzig '62 network simplex Jewell '62 primal-dual Vaidya '89 interior point ­ O (m1.5 n2 log B) time

  11. Journal of Coastal Research 24 3 615627 West Palm Beach, Florida May 2008 A General Formula for Noncohesive Suspended

    E-Print Network [OSTI]

    US Army Corps of Engineers

    Journal of Coastal Research 24 3 615­627 West Palm Beach, Florida May 2008 A General Formula. and LARSON, M., 2008. A general formula for noncohesive suspended sediment transport. Journal of Coastal transport formula for noncohesive sediment is presented for application to river, estuarine, and coastal

  12. Shelf circulation patterns off Nigeria 

    E-Print Network [OSTI]

    Rider, Kelly Elizabeth

    2005-08-29

    Little has been published about the shelf circulation off the coast of Nigeria. Due to increased activity and associated incidents in the shallow waters offshore Nigeria, there is a need to more clearly define the near-shore circulation patterns...

  13. Isentropic diagnostics of mid-latitude circulation and transport

    E-Print Network [OSTI]

    Koh, Tieh-Yong, 1972-

    2001-01-01

    This thesis examines the mid-latitude circulation and tracer transport using zonal average isentropic diagnostics. The Underworld (i.e. the region roughly below the 300K-isentrope) is targeted by our research. Currently, ...

  14. Observed Characteristics of Clouds and Precipitating Systems Associated with the Tropical Circulation in Global Models and Reanalyses 

    E-Print Network [OSTI]

    Stachnik, Justin Paul

    2013-03-25

    This dissertation presents a series of work related to the representation of the Hadley circulation (HC) in atmospheric reanalyses and general circulation models (GCMs), with connections to the underlying tropical and ...

  15. Using Theory to Model Polymer Properties There are two general themes to this research: (1) polymer degradation that occurs when

    E-Print Network [OSTI]

    the polymer with nanoinclusions of carbon nanotubes and graphene sheets and other structures. PolymerUsing Theory to Model Polymer Properties There are two general themes to this research: (1) polymer degradation that occurs when polymers are exposed to low earth orbit conditions, and (2) polymer mechanical

  16. The Role of Eddy-Tansport in the Thermohaline Circulation

    SciTech Connect (OSTI)

    Dr. Paola Cessi

    2011-11-17

    Several research themes were developed during the course of this project. (1) Low-frequency oceanic varibility; (2) The role of eddies in the Antarctic Circumpolar Current (ACC) region; (3) Deep stratification and the overturning circulation. The key findings were as follows: (1) The stratification below the main thermocline (at about 500m) is determined in the circumpolar region and then communicated to the enclosed portions of the oceans through the overturning circulation. (2) An Atlantic pole-to-pole overturning circulation can be maintained with very small interior mixing as long as surface buoyancy values are shared between the northern North Atlantic and the ACC region.

  17. Thermohaline Circulation Lynne D Talley

    E-Print Network [OSTI]

    Talley, Lynne D.

    currents. The convective source regions and ocean basins are connected through deep western boundary cur of the upper 2000 m of the ocean are about 10 times faster, reaching 1 m s 1 in bound- ary currents and about 0, Ltd, Chichester, 2002 #12;Thermohaline Circulation Thermohaline circulation is the part of the ocean

  18. ResearchNews Please circulate to

    E-Print Network [OSTI]

    Anderson, Paul R.

    . Centers build a university's reputation and attract funding, new partnerships, and new faculty. Two economics, arts and humanities, and the professions--law, medicine, business, and divinity-- with other discuss current topics, readings, works in progress, and new directions. CBHS makes small grants to new

  19. ResearchNews Please circulate to

    E-Print Network [OSTI]

    Anderson, Paul R.

    to groundbreaking clean energy technologies. The request does not allocate funds to continue the agency's Graduate subcontracts (NIH contract) ACCORDION - $38.2M, 8 subcontracts (NIH contract) Women's Health Initiative (WHI, information access, and cleaner, more efficient energy use. DOE. The Department of Energy Office of Science

  20. Designing Technical Action Research and Generalizing from Real-World Cases

    E-Print Network [OSTI]

    Wieringa, Roel

    to estimate the effort of this project. The goal is both to help the project and to learn something about developed some new effort estimation technique, (2) use this technique in an ERP implementation project not generalize from it, and the tutorial introduces architectural inference as a way of supporting

  1. Texas AgriLife Research with General Atomics Pilots Microalgae Ponds in Pecos BIOENERGY PROGRAM

    E-Print Network [OSTI]

    production goal would be 5,000 gallons per acre, and researchers are evaluating hybrid systems that could tied to coal-fired power plants, which could use carbon dioxide emissions and waste heat for algae the raceways, and pumps move the water from one pond to another. A laboratory supports the production facility

  2. Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 In general, a microgrid can operate in both the grid-connected

    E-Print Network [OSTI]

    Panel: Microgrid Research and Field Testing IEEE PES General Meeting, 24-28 June 2007, Tampa, FL 1 Abstract In general, a microgrid can operate in both the grid-connected mode and the islanded mode where the microgrid is interfaced to the main power system by a fast semiconductor switch called static switch, (SS

  3. Mechanisms for Tropical Tropospheric Circulation Change in Response to Global Warming*

    E-Print Network [OSTI]

    Xie, Shang-Ping

    Mechanisms for Tropical Tropospheric Circulation Change in Response to Global Warming* JIAN MA change in global warming is studied by comparing the response of an atmospheric general circulation model globally in response to SST warming. A diagnostic framework is developed based on a linear baroclinic model

  4. Discriminating robust and non-robust atmospheric circulation responses to global warming

    E-Print Network [OSTI]

    Discriminating robust and non-robust atmospheric circulation responses to global warming Michael response to global warming in a set of atmospheric general circulation models (AGCMs) is investigated. The global-warmed climate is forced by a global pattern of warmed ocean surface temperatures

  5. Interactions between the Indonesian Throughflow and circulations in the Indian and Pacific Oceans

    E-Print Network [OSTI]

    Jensen, Tommy

    Interactions between the Indonesian Throughflow and circulations in the Indian and Pacific Oceans with the Indonesian Throughflow (IT), particularly concerning subsurface currents in the Pacific Ocean, are studied model (LOM), both confined to the Indo-Pacific basin; and a global, ocean general circulation model

  6. Eos, Vol. 91, No. 30, 27 July 2010 Global ocean circulation is a primary

    E-Print Network [OSTI]

    Susanto, R. Dwi

    , in addition to modify- ing marine ecosystems, primary productiv- ity, and seasonal fish migration. ThereforeEos, Vol. 91, No. 30, 27 July 2010 Global ocean circulation is a primary mechanism for transporting is important for verification of ocean circulation models and of primary interest to climate research

  7. Ocean Circulation Lynne D Talley

    E-Print Network [OSTI]

    Talley, Lynne D.

    to the topography, with low pressure in the center. Ocean currents transport heat from the tropics to the poles have gone to sea. As knowledge about ocean currents and capabilities to observe it below the surfaceOcean Circulation Lynne D Talley Volume 1, The Earth system: physical and chemical dimensions

  8. On-chip superconducting microwave circulator from synthetic rotation

    E-Print Network [OSTI]

    Joseph Kerckhoff; Kevin Lalumière; Benjamin J. Chapman; Alexandre Blais; K. W. Lehnert

    2015-02-21

    We analyze the design of a potential replacement technology for the commercial ferrite circulators that are ubiquitous in contemporary quantum superconducting microwave experiments. The lossless, lumped element design is capable of being integrated on chip with other superconducting microwave devices, thus circumventing the many performance-limiting aspects of ferrite circulators. The design is based on the dynamic modulation of DC superconducting microwave quantum interference devices (SQUIDs) that function as nearly linear, tunable inductors. The connection to familiar ferrite-based circulators is a simple frame boost in the internal dynamics' equation of motion. In addition to the general, schematic analysis, we also give an overview of many considerations necessary to achieve a practical design with a tunable center frequency in the 4-8 GHz frequency band, a bandwidth of 240 MHz, reflections at the -20 dB level, and a maximum signal power of approximately order 100 microwave photons per inverse bandwidth.

  9. On the Patterns of Wind-Power Input to the Ocean Circulation

    E-Print Network [OSTI]

    Roquet, Fabien

    Pathways of wind-power input into the ocean general circulation are analyzed using Ekman theory. Direct rates of wind work can be calculated through the wind stress acting on the surface geostrophic flow. However, because ...

  10. Turbulent convection in the anelastic rotating sphere : a model for the circulation on the giant planets

    E-Print Network [OSTI]

    Kaspi, Yohai

    2008-01-01

    This thesis studies the dynamics of a rotating compressible gas sphere, driven by internal convection, as a model for the dynamics on the giant planets. We develop a new general circulation model for the Jovian atmosphere, ...

  11. Predictive models of circulating fluidized bed combustors

    SciTech Connect (OSTI)

    Gidaspow, D.

    1992-07-01

    Steady flows influenced by walls cannot be described by inviscid models. Flows in circulating fluidized beds have significant wall effects. Particles in the form of clusters or layers can be seen to run down the walls. Hence modeling of circulating fluidized beds (CFB) without a viscosity is not possible. However, in interpreting Equations (8-1) and (8-2) it must be kept in mind that CFB or most other two phase flows are never in a true steady state. Then the viscosity in Equations (8-1) and (8-2) may not be the true fluid viscosity to be discussed next, but an Eddy type viscosity caused by two phase flow oscillations usually referred to as turbulence. In view of the transient nature of two-phase flow, the drag and the boundary layer thickness may not be proportional to the square root of the intrinsic viscosity but depend upon it to a much smaller extent. As another example, liquid-solid flow and settling of colloidal particles in a lamella electrosettler the settling process is only moderately affected by viscosity. Inviscid flow with settling is a good first approximation to this electric field driven process. The physical meaning of the particulate phase viscosity is described in detail in the chapter on kinetic theory. Here the conventional derivation resented in single phase fluid mechanics is generalized to multiphase flow.

  12. "What Controls the Structure and Stability of the Ocean Meridional Overturning Circulation: Implications for Abrupt Climate Change?"

    SciTech Connect (OSTI)

    Fedorov, Alexey

    2013-11-23

    The central goal of this research project is to understand the properties of the ocean meridional overturning circulation (MOC) – a topic critical for understanding climate variability and stability on a variety of timescales (from decadal to centennial and longer). Specifically, we have explored various factors that control the MOC stability and decadal variability in the Atlantic and the ocean thermal structure in general, including the possibility abrupt climate change. We have also continued efforts on improving the performance of coupled ocean-atmosphere GCMs.

  13. Hall Effect Gyrators and Circulators

    E-Print Network [OSTI]

    Giovanni Viola; David P. DiVincenzo

    2014-03-04

    The electronic circulator, and its close relative the gyrator, are invaluable tools for noise management and signal routing in the current generation of low-temperature microwave systems for the implementation of new quantum technologies. The current implementation of these devices using the Faraday effect is satisfactory, but requires a bulky structure whose physical dimension is close to the microwave wavelength employed. The Hall effect is an alternative non-reciprocal effect that can also be used to produce desired device functionality. We review earlier efforts to use an ohmically-contacted four-terminal Hall bar, explaining why this approach leads to unacceptably high device loss. We find that capacitive coupling to such a Hall conductor has much greater promise for achieving good circulator and gyrator functionality. We formulate a classical Ohm-Hall analysis for calculating the properties of such a device, and show how this classical theory simplifies remarkably in the limiting case of the Hall angle approaching 90 degrees. In this limit we find that either a four-terminal or a three-terminal capacitive device can give excellent circulator behavior, with device dimensions far smaller than the a.c. wavelength. An experiment is proposed to achieve GHz-band gyration in millimetre (and smaller) scale structures employing either semiconductor heterostructure or graphene Hall conductors. An inductively coupled scheme for realising a Hall gyrator is also analysed.

  14. Telomere Length in Circulating Leukocytes Is Associated with Lung Function and Disease

    E-Print Network [OSTI]

    Nyholt, Dale R.

    Telomere Length in Circulating Leukocytes Is Associated with Lung Function and Disease Eva Albrecht. Comprehensive Pneumology Center Munich (CPC-M), Member of the German Center for Lung Research, Munich, Germany

  15. Circulation

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room News PublicationsAudits &BradburyMayARM-0501 MarineCenterChrisChristopher MoserCinco

  16. Modelling ocean circulation processes in the MIT general circulation model using nen 

    E-Print Network [OSTI]

    Barnshaw, Heather E

    2007-09-24

    Previous work by Reitsma and Albrecht (2005, 2006) and Reitsma and Dubayah (2006) documented the development and implementation of a new process-based data model, called nen. This paper extends that work by applying the ...

  17. Research

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

    Research Research Isotopes produced at Los Alamos National Laboratory are saving lives, advancing cutting-edge research and keeping the U.S. safe. Research thorium test foil A...

  18. On the circulation and tidal flushing of Mobile Bay, Alabama 

    E-Print Network [OSTI]

    Austin, George Belden

    1953-01-01

    of Symbols, Tables ~ . . . I, INTRODUCTION Historical B. Classification of Estuaries C. Ob]ectives II. GENERAL DISCUSSION OF NOBILE BAY A. Geomorphological B. Geological C. Biological iii ~ ~ vi ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ o sic.... Collection of Data 27 2B V, ANALYSIS OF THE DATA A. Methods B. Distribution of Temperature, Salinity, and Fresh Water Page 30 30 C. Circulation D. Mass Transport . E. Tidal Flushing of Mobile Bay . VI ~ SUMMAHY AND CONCLUSIONS VII, BIBLIOGRAPHY...

  19. Circulation in Enewetak Atoll lagoon

    SciTech Connect (OSTI)

    Atkinson, M.; Smith, S.V.; Stroup, E.D.

    1981-11-01

    Currents at Enewetak Atoll, Marshall Islands, were measured on the reef margins, in the channels, and in the lagoon. Lagoon circulation is dominated by wind-driven downwind surface flow and an upwind middepth return flow. This wind-driven flow has the characteristics of an Ekman spiral in an enclosed sea. Lagoon flushing is accomplished primarily by surf-driven water input over the windward (eastern) reefs and southerly drift out the South Channel. Mean water residence time is 1 month, while water entering the northern portion of the atoll takes about 4 months to exit.

  20. Posters A Stratiform Cloud Parameterization for General Circulation Models

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgram Guidelines This document outlines the majorL.Posters Posters51

  1. Posters Comparison Between General Circulation Model Simulation and Central Equatorial

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgram Guidelines This document outlines the majorL.Posters

  2. Posters Treatment of Cloud Radiative Effects in General Circulation Models

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeedingProgram Guidelines This document outlines the majorL.Posters955 Posters3735

  3. Evaluation of cirrus statistics produced by general circulation models

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunitiesof Energy8) Wigner Home ·the EffectEvaluation

  4. General Permit General Permit

    E-Print Network [OSTI]

    L General Permit Parking LOT A General Permit Parking LOT C General Permit Parking LOT R Reserved Parking LOT D Faculty/Staff Parking LOT K General Permit Parking LOT J Reserved Parking PV LOT General Parking after 3 p.m. WEST CAMPUS PARKING LOT O General Permit Parking LOT M General Permit Parking LOT P

  5. General Permit General Permit

    E-Print Network [OSTI]

    98 28 28 60 96 31 7 23 LOT L General Permit Parking LOT A General Permit Parking LOT C General Permit Parking LOT R Reserved Parking LOT D Faculty/Staff Parking LOT K General Permit Parking LOT J Reserved Parking PV LOT General Parking after 3 p.m. WEST CAMPUS PARKING LOT O General Permit Parking LOT M General

  6. The Maine Coastal Current: Spring Climatological Circulation

    E-Print Network [OSTI]

    The Maine Coastal Current: Spring Climatological Circulation Daniel R. Lynch, Monica J. Holboke in the Gulf of Maine, with special emphasis on its coastal current in the periods March­April and May of Maine cyclonic circulation is persistent, with significant bimonthly modulation of key Maine Coastal

  7. Downhole material injector for lost circulation control

    DOE Patents [OSTI]

    Glowka, D.A.

    1991-01-01

    This invention is comprised of an apparatus and method for simultaneously and separately emplacing two streams of different materials through a drillstring in a borehole to a downhole location for lost circulation control. The two streams are mixed outside the drillstring at the desired downhole location and harden only after mixing for control of a lost circulation zone.

  8. Microfluidic Platforms for Capturing Circulating Tumor Cells

    E-Print Network [OSTI]

    Tang, William C

    Microfluidic Platforms for Capturing Circulating Tumor Cells Sweta Gupta, Allison C. Baker-cost microfluidic device that can be used to isolate and capture circulating tumor cells (CTCs) from whole blood. The device was made from polydimethylsiloxane (PDMS) consisting of a microfluidic channel with microposts

  9. Downhole material injector for lost circulation control

    DOE Patents [OSTI]

    Glowka, D.A.

    1994-09-06

    Apparatus and method are disclosed for simultaneously and separately emplacing two streams of different materials through a drill string in a borehole to a downhole location for lost circulation control. The two streams are mixed outside the drill string at the desired downhole location and harden only after mixing for control of a lost circulation zone. 6 figs.

  10. The effect of topography on the Martian atmospheric circulation and determining Pluto's atmospheric thermal structure from stellar occultations

    E-Print Network [OSTI]

    Zalucha, Angela M. (Angela Marie)

    2010-01-01

    Previous work with Mars General Circulation Models (MGCMs) has shown that the north-south slope in Martian topography causes asymmetries in the Hadley cells at equinox and in the annual average. To quantitatively solve for ...

  11. Research

    E-Print Network [OSTI]

    My research interests. Numerical method of stochastic partial differential equations; Uncertainty Quantification; High-order numerical method; Domain ...

  12. Research

    E-Print Network [OSTI]

    author

    Research Interests. Mathematical biology: Computational modelling of biological systems, experimental design and control of cellular processes. Applied math: ...

  13. RF power recovery feedback circulator

    DOE Patents [OSTI]

    Sharamentov, Sergey I. (Bolingbrook, IL)

    2011-03-29

    A device and method for improving the efficiency of RF systems having a Reflective Load. In the preferred embodiment, Reflected Energy from a superconducting resonator of a particle accelerator is reintroduced to the resonator after the phase of the Reflected Energy is aligned with the phase of the Supply Energy from a RF Energy Source. In one embodiment, a Circulator is used to transfer Reflected Energy from the Reflective Load into a Phase Adjuster which aligns the phase of the Reflected Energy with that of the Supply Energy. The phase-aligned energy is then combined with the Supply Energy, and reintroduced into the Reflective Load. In systems having a constant phase shift, the Phase Adjuster may be designed to shift the phase of the Reflected Energy by a constant amount using a Phase Shifter. In systems having a variety (variable) phase shifts, a Phase Shifter controlled by a phase feedback loop comprising a Phase Detector and a Feedback Controller to account for the various phase shifts is preferable.

  14. Global warming and changes in ocean circulation

    SciTech Connect (OSTI)

    Duffy, P.B.; Caldeira, K.C.

    1998-02-01

    This final report provides an overview of the goals and accomplishments of this project. Modeling and observational work has raised the possibility that global warming may cause changes in the circulation of the ocean. If such changes would occur they could have important climatic consequences. The first technical goal of this project was to investigate some of these possible changes in ocean circulation in a quantitative way, using a state-of -the-art numerical model of the ocean. Another goal was to develop our ocean model, a detailed three-dimensional numerical model of the ocean circulation and ocean carbon cycles. A major non-technical goal was to establish LLNL as a center of excellence in modelling the ocean circulation and carbon cycle.

  15. PHYSICS OF OCEAN CIRCULATION Instructor: S. Riser

    E-Print Network [OSTI]

    Riser, Stephen C.

    Topography Tides Wind Geothermal heating Surface flows elsewhere #12;How deep is the ocean? The average ocean circulation #12;UNITS Horizontal distance: km (= 105 cm) Vertical distance: m Velocity: cm/sec Density: g/cm3

  16. Circulation and convection in the Irminger Sea

    E-Print Network [OSTI]

    Våge, Kjetil

    2010-01-01

    Aspects of the circulation and convection in the Irminger Sea are investigated using a variety of in-situ, satellite, and atmospheric reanalysis products. Westerly Greenland tip jet events are intense, small-scale wind ...

  17. Continuous Circulation System: a new enabling technology 

    E-Print Network [OSTI]

    Kenawy, Walid F.

    2002-01-01

    of drilled cuttings. It also causes some operating problems in underbalanced drilling. A new technology in drilling has been introduced through a joint industry project to overcome problems caused by interruption of circulation. This technology...

  18. Cops and Robber on Circulant Graphs

    E-Print Network [OSTI]

    Bonato, Anthony

    Edward Island #12;Cops and Robber Played on a finite, simple graph Cops have perfect information TwoCops and Robber on Circulant Graphs Shannon Fitzpatrick John Paul Larkin University of Prince

  19. Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 Winners *ReindustrializationEnergyWindNO.RequirementsResearch Research

  20. Recent technology improvements in Exxon's circulating zinc-bromine battery system

    SciTech Connect (OSTI)

    Bellows, R.J.

    1981-01-01

    Recent electrode and electrolyte performance on 500 wH and 3 kWh units indicates that Exxon's circulating zinc-bromine battery in 20 kWh designs will be capable of high energy density (65 to 70 wH/kg), and turn-around efficiency (65 to 70%). This performance, coupled with recent factory cost projections of $28/kWh (exclusive of R.O.I. and various indirect overheads), makes zinc/bromine an attractive advanced battery candidate for not only photovoltaic, but also electric vehicle and bulk energy storage applications. Recent technical developments in this program may be generally useful in other circulating electrolyte systems.

  1. Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAboutNuclearPrincipal InvestigatorsResearch

  2. Vertical mixing and the ocean circulation

    E-Print Network [OSTI]

    Jones, Peter JS

    Changing sources of mixing Hurricanes Tidal dissipation 2 #12;Zonal Mean Ocean Temperature 3 #12;Sandström's Theorem A circulation cannot be driven unless heat is input at a lower depth than it is lost in the ocean? Wind-driven stirring Tidal generation of internal waves Biota Hurricanes Nasa 6 #12;Sources

  3. Regional Patterns of Tropical Indo-Pacific Climate Change: Evidence of the Walker Circulation Weakening*

    E-Print Network [OSTI]

    Xie, Shang-Ping

    in the tropical eastern Pacific and western Indian Ocean than in the tropical western Pacific and eastern IndianRegional Patterns of Tropical Indo-Pacific Climate Change: Evidence of the Walker Circulation Weakening* HIROKI TOKINAGA, SHANG-PING XIE, AND AXEL TIMMERMANN International Pacific Research Center, SOEST

  4. JETS: intense circulations in atmospheres and ocean OC569c Spring 2008

    E-Print Network [OSTI]

    1 JETS: intense circulations in atmospheres and ocean OC569c Spring 2008 Room 211 Ocean Teaching.ocean.washington.edu/research/gfd Outline a look at the extratropical jet stream with synoptic data: transport, energy, vertical structure or veering with height) the Hadley cell and its limited size oceanic jets and boundary currents Why

  5. The Transient Circulation Response to Radiative Forcings and Sea Surface Warming

    SciTech Connect (OSTI)

    Staten, Paul; Reichler, Thomas; Lu, Jian

    2014-12-15

    Tropospheric circulation shifts have strong potential to impact surface climate. But the magnitude of these shifts in a changing climate, and the attending regional hydrological changes, are difficult to project. Part of this difficulty arises from our lack of understanding of the physical mechanisms behind the circulation shifts themselves. In order to better delineate circulation shifts and their respective causes, we decompose the circulation response into (1) the "direct" response to radiative forcings themselves, and (2) the "indirect" response to changing sea surface temperatures. Using ensembles of 90-day climate model simulations with immediate switch-on forcings, including perturbed greenhouse gas concentrations, stratospheric ozone concentrations, and sea surface temperatures, we document the direct and indirect transient responses of the zonal mean general circulation, and investigate the roles of previously proposed mechanisms in shifting the midlatitude jet. We find that both the direct and indirect wind responses often begin in the lower stratosphere. Changes in midlatitude eddies are ubiquitous and synchronous with the midlatitude zonal wind response. Shifts in the critical latitude of wave absorption on either flank of the jet are not indicted as primary factors for the poleward shifting jet, although we see some evidence for increasing equatorward wave reflection over the southern hemisphere in response to sea surface warming. Mechanisms for the northern hemisphere jet shift are less clear.

  6. Dynamics of the Thermohaline Circulation under Wind forcing

    E-Print Network [OSTI]

    Hongjun Gao; Jinqiao Duan

    2001-08-12

    The ocean thermohaline circulation, also called meridional overturning circulation, is caused by water density contrasts. This circulation has large capacity of carrying heat around the globe and it thus affects the energy budget and further affects the climate. We consider a thermohaline circulation model in the meridional plane under external wind forcing. We show that, when there is no wind forcing, the stream function and the density fluctuation (under appropriate metrics) tend to zero exponentially fast as time goes to infinity. With rapidly oscillating wind forcing, we obtain an averaging principle for the thermohaline circulation model. This averaging principle provides convergence results and comparison estimates between the original thermohaline circulation and the averaged thermohaline circulation, where the wind forcing is replaced by its time average. This establishes the validity for using the averaged thermohaline circulation model for numerical simulations at long time scales.

  7. Deep South China Sea circulation Guihua Wang,1,2

    E-Print Network [OSTI]

    Xie, Shang-Ping

    Deep South China Sea circulation Guihua Wang,1,2 ShangPing Xie,2,3 Tangdong Qu,2 and Rui Xin Huang4 Environment Model reveals a basin scale cyclonic circulation over the deep South China Sea (SCS). The cyclonic, and potential density in the deep SCS are consistent with the existence of the cyclonic circulation

  8. Reducing mode circulating fluid bed combustion

    DOE Patents [OSTI]

    Lin, Yung-Yi (Katy, TX); Sadhukhan, Pasupati (Katy, TX); Fraley, Lowell D. (Sugarland, TX); Hsiao, Keh-Hsien (Houston, TX)

    1986-01-01

    A method for combustion of sulfur-containing fuel in a circulating fluid bed combustion system wherein the fuel is burned in a primary combustion zone under reducing conditions and sulfur captured as alkaline sulfide. The reducing gas formed is oxidized to combustion gas which is then separated from solids containing alkaline sulfide. The separated solids are then oxidized and recycled to the primary combustion zone.

  9. Wind induced circulation on the outer continental shelf of Texas, spring 1982 

    E-Print Network [OSTI]

    Beard, Daniel Walker

    1984-01-01

    in the record is offshore, to the southeast. On the 29th of March, in the wake of strong northeast winds, the current shifted to the west. In general, the westward direction was maintained throughout the deployment period. However, there was one occurrence... WIND INDUCED CIRCULATION ON THE OUTER CONTINENTAL SHELF OF TEXAS, SPRING 1982 A Thesis by DANIEL WALKER BEARD Submitted to the Graduate College of Texas AE M University in partial fulfillment of the requirements for the degree of MASTER...

  10. Reversing the Circulation of Magnetic Vortices

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100Nationalquestionnaires 0serial codesReversing the Circulation of Magnetic

  11. Reversing the Circulation of Magnetic Vortices

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100Nationalquestionnaires 0serial codesReversing the Circulation of

  12. Reversing the Circulation of Magnetic Vortices

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100Nationalquestionnaires 0serial codesReversing the Circulation ofReversing

  13. Reversing the Circulation of Magnetic Vortices

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100Nationalquestionnaires 0serial codesReversing the Circulation

  14. Reversing the Circulation of Magnetic Vortices

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100Nationalquestionnaires 0serial codesReversing the CirculationReversing

  15. Carderock Circulating Water Channel | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla, Georgia: Energy ResourcesRanchCirculating Water Channel Jump

  16. Continuous VRML output fromContinuous VRML output from regional circulation models: aregional circulation models: a

    E-Print Network [OSTI]

    Continuous VRML output fromContinuous VRML output from regional circulation models: aregional and volume to viewview ·· Generate Virtual Reality Modeling LanguageGenerate Virtual Reality ModelingDesktop or laptop PC with web browser ­­ High speed/large RAM not essentialHigh speed/large RAM not essential

  17. Circulation in gas-slurry column reactors

    SciTech Connect (OSTI)

    Clark, N.; Kuhlman, J.; Celik, I.; Gross, R.; Nebiolo, E.; Wang, Yi-Zun.

    1990-08-15

    Circulation in bubble columns, such as those used in fischer-tropsch synthesis, detracts from their performance in that gas is carried on average more rapidly through the column, and the residence time distribution of the gas in the column is widened. Both of these factors influence mass-transfer operations in bubble columns. Circulation prediction and measurement has been undertaken using probes, one-dimensional models, laser Doppler velocimetry, and numerical modeling. Local void fraction was measured using resistance probes and a newly developed approach to determining air/water threshold voltage for the probe. A tall column of eight inch diameter was constructed of Plexiglas and the distributor plate was manufactured to distribute air evenly through the base of the column. Data were gathered throughout the volume at three different gas throughputs. Bubble velocities proved difficult to measure using twin probes with cross-correlation because of radial bubble movement. A series of three-dimensional mean and RMS bubble and liquid velocity measurements were also obtained for a turbulent flow in a laboratory model of a bubble column. These measurements have been made using a three-component laser Doppler velocimeter (LDV), to determine velocity distributions non-intrusively. Finally, the gas-liquid flow inside a vertically situated circular isothermal column reactor was simulated numerically. 74 refs., 170 figs., 5 tabs.

  18. Hydrodynamic aspects of a circulating fluidized bed with internals

    SciTech Connect (OSTI)

    Balasubramanian, N.; Srinivasakannan, C.

    1998-06-01

    An attempt is made to examine the influence of internals (baffles) in the riser of the circulating fluidized bed. Experiments are conducted in a circulating fluidized bed, having perforated plates with different free areas. It is noticed from the present work that a circulating fluidized bed having 45% free area gives uniform solids concentration and pressure drop along the length of the riser. In addition to the uniformity, the circulating fluidized bed with internals gives higher pressure drop (solids concentration) compared to a conventional circulating fluidized bed. For internals having 67.6% free area the pressure drop is higher at the lower portion of the riser compared to the upper portion, similar to a conventional circulating fluidized bed. For 30% free area plates the solids concentration varies axially within the stage and remains uniform from stage to stage.

  19. Impact of a Warm Ocean Eddy's Circulation on Hurricane-Induced Sea Surface Cooling with Implications for Hurricane Intensity

    E-Print Network [OSTI]

    Rhode Island, University of

    Impact of a Warm Ocean Eddy's Circulation on Hurricane-Induced Sea Surface Cooling with Implications for Hurricane Intensity RICHARD M. YABLONSKY AND ISAAC GINIS Graduate School of Oceanography) ABSTRACT Upper oceanic heat content (OHC) in advance of a hurricane is generally superior to prestorm sea

  20. Progress in The Lost Circulation Technology Development Program

    SciTech Connect (OSTI)

    Glowka, D.A.; Schafer, D.M.; Loeppke, G.E.; Wright, E.K.

    1991-01-01

    Lost circulation is the loss of drilling fluid from the wellbore to fractures or pores in the rock formation. In geothermal drilling, lost circulation is often a serious problem that contributes greatly to the cost of the average geothermal well. The Lost Circulation Technology Development Program is sponsored at Sandia National Laboratories by the US Department of Energy. The goal of the program is to reduce lost circulation costs by 30--50{percent} through the development of mitigation and characterization technology. This paper describes the technical progress made in this program during the period April, 1990--March, 1991. 4 refs., 15 figs., 1 tab.

  1. The Role of Circulation Features on Black Carbon Transport into...

    Office of Scientific and Technical Information (OSTI)

    significantly different AO modulation of BC transport over Northeast Asia and Eastern Europe. Nevertheless, we find that the overall climatological circulation patterns simulated...

  2. Research Staff Forum 12th February 2015

    E-Print Network [OSTI]

    Sussex, University of

    Research Staff Forum 12th February 2015 #12;Welcome! · Quick update from Research Staff Office · Understanding Research Impact ­ Christina Miariti, Research Impact officer · Open Discussions and Lunch (All Slides and Resources will be circulated after the event and uploaded onto the research staff webpages

  3. Primary cementing across massive lost circulation zones

    SciTech Connect (OSTI)

    Turki, W.H.; Mackay, A.S.

    1983-03-01

    As a result of severe lost circulation problems in some wells in the Ghawar and Abqaiq Fields, Aramco has been unable to cover the Umm Er-Radhuma (Paleocene) and Wasia (Cretaceous) aquifers with cement. This has necessitated setting an extended liner opposite the Wasia aquifer, to ensure that there are two casing strings and a cement sheath across the aquifer, resulting in increased casing cost and reduced well productivity. This paper describes the results of field trial tests performed, along with conclusions and recommendations aimed at solving this problem. Field methods employed include light weight extended cements, ultra-light cement slurries weighing as little as 55 lbm/ft/sup 3/ (pcf), using ceramic hollow spheres, glass bubbles and foam, plus hydrostatic cementing, and mechanical devices. Finally, methods of job evaluation are discussed. These include temperature surveys, bond logs, radioactive tracers, and a new cement volume log.

  4. Thermodynamics of atmospheric circulation on hot Jupiters

    E-Print Network [OSTI]

    J. Goodman

    2008-10-07

    Atmospheric circulation on tidally-locked exoplanets is driven by the absorption and reradiation of heat from the host star. They are natural heat engines, converting heat into mechanical energy. A steady state is possible only if there is a mechanism to dissipate mechanical energy, or if the redistribution of heat is so effective that the Carnot efficiency is driven to zero. Simulations based on primitive, equivalent-barotropic, or shallow-water equations without explicit provision for dissipation of kinetic energy and for recovery of that energy as heat, violate energy conservation. More seriously perhaps, neglect of physical sources of drag may overestimate wind speeds and rates of advection of heat from the day to the night side.

  5. Independent review of SCDAP/RELAP5 natural circulation calculations

    SciTech Connect (OSTI)

    Martinez, G.M.; Gross, R.J.; Martinez, M.J.; Rightley, G.S.

    1994-01-01

    A review and assessment of the uncertainties in the calculated response of reactor coolant system natural circulation using the SCDAP/RELAP5 computer code were completed. The SCDAP/RELAP5 calculation modeled a station blackout transient in the Surry nuclear power plant and concluded that primary system depressurization from natural circulation induced primary system failure is more likely than previously thought.

  6. An Empirical Test of Context-Specific Safety Climate Measurement: A Comparison of Five Research Laboratory Safety Climate Measures to a General Measure of Safety Climate 

    E-Print Network [OSTI]

    Keiser, Nathanael Lincoln

    2015-08-05

    , general safety climate measures might provide a comparatively deficient assessment of the underlying construct as indicated by weaker relationships with various safety-related constructs (e.g., safety knowledge, injuries, etc.). In the current study, 757...

  7. 3D modeling of GJ1214b's atmosphere: vertical mixing driven by an anti-Hadley circulation

    E-Print Network [OSTI]

    Charnay, Benjamin; Leconte, Jérémy

    2015-01-01

    GJ1214b is a warm sub-Neptune transiting in front of a nearby M dwarf star. Recent observations indicate the presence of high and thick clouds or haze whose presence requires strong atmospheric mixing. In order to understand the transport and distribution of such clouds/haze, we study the atmospheric circulation and the vertical mixing of GJ1214b with a 3D General Circulation Model for cloud-free hydrogen-dominated atmospheres (metallicity of 1, 10 and 100 times the solar value) and for a water-dominated atmosphere. We analyze the effect of the atmospheric metallicity on the thermal structure and zonal winds. We also analyze the zonal mean meridional circulation and show that it corresponds to an anti-Hadley circulation in most of the atmosphere with upwelling at mid-latitude and downwelling at the equator in average. This circulation must be present on a large range of synchronously rotating exoplanets with strong impact on cloud formation and distribution. Using simple tracers, we show that vertical winds o...

  8. Testing Components of New Community Isopycnal Ocean Circulation Model

    SciTech Connect (OSTI)

    Bryan, Kirk

    2008-05-09

    The ocean and atmosphere are both governed by the same physical laws and models of the two media have many similarities. However, there are critical differences that call for special methods to provide the best simulation. One of the most important difference is that the ocean is nearly opaque to radiation in the visible and infra-red part of the spectrum. For this reason water mass properties in the ocean are conserved along trajectories for long distances and for long periods of time. For this reason isopycnal coordinate models would seem to have a distinct advantage in simulating ocean circulation. In such a model the coordinate surfaces are aligned with the natural paths of near adiabatic, density conserving flow in the main thermocline. The difficulty with this approach is at the upper and lower boundaries of the ocean, which in general do not coincide with density surfaces. For this reason hybrid coordinate models were proposed by Bleck and Boudra (1981) in which Cartesian coordinates were used near the ocean surface and isopycnal coordinates were used in the main thermocline. This feature is now part of the HICOM model (Bleck, 2002).

  9. Design of Complex Systems to Achieve Passive Safety: Natural Circulation Cooling of Liquid Salt Pebble Bed Reactors

    E-Print Network [OSTI]

    Scarlat, Raluca Olga

    2012-01-01

    natural circulation solar water heater. Energy Conversionas water circulation in solar water heaters 60 , and passivewater circulation in solar water heaters 60 , and passive

  10. CIRCULATING MOVING BED COMBUSTION PROOF OF CONCEPT

    SciTech Connect (OSTI)

    Jukkola, Glen

    2010-06-30

    Circulating Moving Bed (CMB) combustion technology has its roots in traditional circulating fluidized bed technology and involves a novel method of solid fuel combustion and heat transfer. CMB technology represents a step change in improved performance and cost relative to conventional PC and FBC boilers. The CMB heat exchanger preheats the energy cycle working fluid, steam or air, to the high temperature levels required in systems for advanced power generation. Unique features of the CMB are the reduction of the heat transfer surfaces by about 60% as a result of the enhanced heat transfer rates, flexibility of operation, and about 30% lower cost over existing technology. The CMB Phase I project ran from July 2001 through March 2003. Its objective was to continue development of the CMB technology with a series of proof of concept tests. The tests were conducted at a scale that provided design data for scale up to a demonstration plant. These objectives were met by conducting a series of experiments in ALSTOM Power’s Multi-use Test Facility (MTF). The MTF was modified to operate under CMB conditions of commercial interest. The objective of the tests were to evaluate gas-to-solids heat transfer in the upper furnace, assess agglomeration in the high temperature CMB bubbling bed, and evaluate solids-to-tube heat transfer in the moving bed heat exchanger. The Phase I program results showed that there are still some significant technical uncertainties that needed to be resolved before the technology can be confidently scaled up for a successful demonstration plant design. Work remained in three primary areas: • scale up of gas to solid heat transfer • high temperature finned surface design • the overall requirements of mechanical and process design. The CMB Phase II workscope built upon the results of Phase I and specifically addressed the remaining technical uncertainties. It included a scaled MTF heat transfer test to provide the necessary data to scale up gas-to-solids heat transfer. A stress test rig was built and tested to provide validation data for a stress model needed to support high temperature finned surface design. Additional cold flow model tests and MTF tests were conducted to address mechanical and process design issues. This information was then used to design and cost a commercial CMB design concept. Finally, the MBHE was reconfigured into a slice arrangement and tested for an extended duration at a commercial CFB plant.

  11. Estimates of the stratospheric residual circulation using the downward control principle

    SciTech Connect (OSTI)

    Rosenlof, K.H.; Holton, J.R. [Univ. of Washington, Seattle, WA (United States)

    1993-06-20

    The transformed Eulerian-mean momentum and continuity equations are used to calculate the residual mean meridional circulations for the lower stratosphere and troposphere. Momentum and temperature fluxes required for the computation are estimated from U.K. Meterological Office (UKMO) analyzed geopotential heights. National Center for Atmospheric Research (NCAR) CCM2 model output is used to assess the errors associated with the calculation. The model comparisons showed that the method works reasonably well for solstice seasons, but is inadequate for equinox seasons. In addition, it is found that some parameterization of gravity wave drag needs to be included with the planetary wave forcing to accurately estimate the residual mean circulation using this method. 24 refs., 10 figs., 5 tabs.

  12. GENERAL INFORMATION City State Zip

    E-Print Network [OSTI]

    Ullrich, Paul

    GENERAL INFORMATION City State Zip Phone Number Mobile Number BACKGROUND INFORMATION Venture of operation of your company? TM VENTURE CATALYST Smart Toolkit for Accelerated Research Translation START Last

  13. COMPUTATIONAL MODELING OF CIRCULATING FLUIDIZED BED REACTORS

    SciTech Connect (OSTI)

    Ibrahim, Essam A

    2013-01-09

    Details of numerical simulations of two-phase gas-solid turbulent flow in the riser section of Circulating Fluidized Bed Reactor (CFBR) using Computational Fluid Dynamics (CFD) technique are reported. Two CFBR riser configurations are considered and modeled. Each of these two riser models consist of inlet, exit, connecting elbows and a main pipe. Both riser configurations are cylindrical and have the same diameter but differ in their inlet lengths and main pipe height to enable investigation of riser geometrical scaling effects. In addition, two types of solid particles are exploited in the solid phase of the two-phase gas-solid riser flow simulations to study the influence of solid loading ratio on flow patterns. The gaseous phase in the two-phase flow is represented by standard atmospheric air. The CFD-based FLUENT software is employed to obtain steady state and transient solutions for flow modulations in the riser. The physical dimensions, types and numbers of computation meshes, and solution methodology utilized in the present work are stated. Flow parameters, such as static and dynamic pressure, species velocity, and volume fractions are monitored and analyzed. The differences in the computational results between the two models, under steady and transient conditions, are compared, contrasted, and discussed.

  14. Does hydrologic circulation mask frictional heat on faults after large earthquakes?

    E-Print Network [OSTI]

    Fulton, Patrick M.; Harris, Robert N.; Saffer, Demian M.; Brodsky, Emily E.

    2010-01-01

    from circulating fluids during drilling diffuse quickly5.1. Thermal Disturbance From Drilling Fluids [ 18 ]During drilling, fluids are circulated through the bore-

  15. On the World-wide Circulation of the Deeper Waters of the World Ocean

    E-Print Network [OSTI]

    Reid, Joseph L

    2009-01-01

    circulation of the Pacific Ocean: Flow patterns, tracers,in preparing the figures. Fig. 1 Pacific Ocean winds Fig.2 Pacific Ocean circulation Fig. 4 Pacific Ocean potential

  16. Circulating heat exchangers for oscillating wave engines and refrigerators

    DOE Patents [OSTI]

    Swift, Gregory W.; Backhaus, Scott N.

    2003-10-28

    An oscillating-wave engine or refrigerator having a regenerator or a stack in which oscillating flow of a working gas occurs in a direction defined by an axis of a trunk of the engine or refrigerator, incorporates an improved heat exchanger. First and second connections branch from the trunk at locations along the axis in selected proximity to one end of the regenerator or stack, where the trunk extends in two directions from the locations of the connections. A circulating heat exchanger loop is connected to the first and second connections. At least one fluidic diode within the circulating heat exchanger loop produces a superimposed steady flow component and oscillating flow component of the working gas within the circulating heat exchanger loop. A local process fluid is in thermal contact with an outside portion of the circulating heat exchanger loop.

  17. Parameters of Integral Circulant Graphs and Periodic Quantum Dynamics

    E-Print Network [OSTI]

    Nitin Saxena; Simone Severini; Igor Shparlinski

    2007-03-26

    The intention of the paper is to move a step towards a classification of network topologies that exhibit periodic quantum dynamics. We show that the evolution of a quantum system, whose hamiltonian is identical to the adjacency matrix of a circulant graph, is periodic if and only if all eigenvalues of the graph are integers (that is, the graph is integral). Motivated by this observation, we focus on relevant properties of integral circulant graphs. Specifically, we bound the number of vertices of integral circulant graphs in terms of their degree, characterize bipartiteness and give exact bounds for their diameter. Additionally, we prove that circulant graphs with odd order do not allow perfect state transfer.

  18. Gas phase hydrodynamics inside a circulating fluidized bed

    E-Print Network [OSTI]

    Moran, James C. (James Christopher)

    2001-01-01

    Circulating Fluidized Beds (CFB's) offer many advantages over traditional pulverized coal burners in the power generation industry. They operate at lower temperatures, have better environmental emissions and better fuel ...

  19. The biogeochemistry and residual mean circulation of the southern ocean

    E-Print Network [OSTI]

    Ito, Takamitsu, 1976-

    2005-01-01

    I develop conceptual models of the biogeochemistry and physical circulation of the Southern Ocean in order to study the air-sea fluxes of trace gases and biological productivity and their potential changes over ...

  20. General Engineer

    Broader source: Energy.gov [DOE]

    This position may be located in either the Office of Energy Statistics or the Office of Energy Analysis of EIA. This position is established to provide a professional general engineer to perform...

  1. General Information

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERALProblemsGeneral Information General

  2. Stability of Thermohaline circulation with respect to fresh water release

    E-Print Network [OSTI]

    Ajay Patwardhan; Vivek Tewary

    2008-05-16

    The relatively warm climate found in the North- Western Europe is due to the gulf stream that circulates warm saline water from southern latitudes to Europe. In North Atlantic ocean the stream gives out a large amount of heat, cools down and sinks to the bottom to complete the Thermohaline circulation. There is considerable debate on the stability of the stream to inputs of fresh water from the melting ice in Greenland and Arctic. The circulation, being switched off, will have massive impact on the climate of Europe. Intergovernmental panel on climate change (IPCC) has warned of this danger in its recent report. Our aim is to model the Thermohaline circulation at the point where it sinks in the North-Atlantic. We create a two dimensional discrete map modeling the salinity gradient and vertical velocity of the stream. We look for how a perturbation in the form of fresh water release can destabilise the circulation by pushing the velocity below a certain threshold.

  3. Precipitation response to land subsurface hydrologic processes in atmospheric general circulation model simulations

    E-Print Network [OSTI]

    Lo, Min-Hui; Famiglietti, James S

    2011-01-01

    spatially variable water and energy balance processes, Waterdescribe fluxes of energy, water, and momentum between thewater vapor in the lower tropo- sphere increases moist static energy [

  4. Interactive chemistry in the Laboratoire de Meteorologie Dynamique general circulation model

    E-Print Network [OSTI]

    Hourdin, Chez Frédéric

    of soluble species. The global and annual mean methane (7.9 years) and methylchloroform (4.6 years) chemical chemical scheme representative of the background chemistry of the troposphere is considered. We derive rapid interhemispheric exchange times of 1.13­ 1.38 years and 0.70­0.82 years, based on surface

  5. Comparison of observed and general circulation model derived continental subsurface heat flux in the Northern Hemisphere

    E-Print Network [OSTI]

    Beltrami, Hugo

    and compared to those obtained from subsurface geothermal data. Since GCMs have bottom boundary conditions. In addition, the agreement between the LSM surface fluxes and the borehole temperature reconstructed fluxes

  6. Constraints on Saturn's tropospheric general circulation from Cassini ISS images Anthony D. Del Genio a,

    E-Print Network [OSTI]

    images from 2011 and 2012 to define the near-global distribution of zonal winds and eddy momentum fluxes combined with the greater feature contrast in the northern hemisphere during the approach to spring equinox allow for better rejection of erroneous wind vectors, a more objective assessment at any latitude

  7. Petascale Atmospheric General Circulation Models R. D. Nair and H. M. Tufo#

    E-Print Network [OSTI]

    Nair, Ramachandran D.

    ) into an Earth system model will require a highly scalable and accurate flux-form formulation of the dynamics

  8. WORK IN PROGRESS --NOT FOR GENERAL CIRCULATION Animal Spirits: Affective and Deliberative

    E-Print Network [OSTI]

    , and that the person's behavior is chosen to best achieve those goals. We develop a model in which a person's behavior model provides a framework for understanding many departures from full rationality discussed on factors that moderate the relative influence of the two systems, our model generates a variety of novel

  9. Interannual variations in the North American monsoon and SST anomalies: A general circulation model study.

    E-Print Network [OSTI]

    Farrara, J. D.; Yu, J.-Y.

    2002-01-01

    surface solar fluxes decrease. In the Gulf of Mexico, thesolar radiative fluxes (not shown). For the Gulf of Mexico,

  10. Observational data for studies of the General Circulation Overall global coverage (both over land and ocean)

    E-Print Network [OSTI]

    O'Gorman, Paul

    2005­2006). Dates of radiosonde changes (red dotted lines) are one sort of `metadata event',5 others--change of pressure sensor; triangle--change of wind equipment; square--change of relative humidity sensor. Photos

  11. Changing the Climate Sensitivity of an Atmospheric General Circulation Model through Cloud Radiative Adjustment

    E-Print Network [OSTI]

    Sokolov, Andrei P.

    Conducting probabilistic climate projections with a particular climate model requires the ability to vary the model’s characteristics, such as its climate sensitivity. In this study, the authors implement and validate a ...

  12. NOAA Technical Memorandum ERL GLERL-16 A GENERAL CIRCULATION MODEL FOR LAKES

    E-Print Network [OSTI]

    Stability 4.5 Energy Conservation PRELIMINARY RESULTS SUMMARY AND CONCLUSIONS . ACKNOWLEDGMENTS REFERENCES of prognostic variables. Vertically integrated transport function under the south- westerly wind. Time evolution of the kinetic energy in the Lake Ontario model; (a) Total kinetic energy, (b) Kinetic energy of the barorropic

  13. Interannual variations in the North American monsoon and SST anomalies: A general circulation model study.

    E-Print Network [OSTI]

    Farrara, J. D.; Yu, J.-Y.

    2002-01-01

    the recent notable Midwest summer flood ( drought) events ofdrought in particular—the rain- fall anomalies in the Midwest

  14. Cloud/Aerosol Parameterizations: Application and Improvement of General Circulation Models

    SciTech Connect (OSTI)

    Penner, Joyce

    2012-06-30

    One of the biggest uncertainties associated with climate models and climate forcing is the treatment of aerosols and their effects on clouds. The effect of aerosols on clouds can be divided into two components: The first indirect effect is the forcing associated with increases in droplet concentrations; the second indirect effect is the forcing associated with changes in liquid water path, cloud morphology, and cloud lifetime. Both are highly uncertain. This project applied a cloud-resolving model to understand the response of clouds under a variety of conditions to changes in aerosols. These responses are categorized according to the large-scale meteorological conditions that lead to the response. Meteorological conditions were sampled from various fields, which, together with a global aerosol model determination of the change in aerosols from present day to pre-industrial conditions, was used to determine a first order estimate of the response of global cloud fields to changes in aerosols. The response of the clouds in the NCAR CAM3 GCM coupled to our global aerosol model were tested by examining whether the response is similar to that of the cloud resolving model and methods for improving the representation of clouds and cloud/aerosol interactions were examined.

  15. Precipitation response to land subsurface hydrologic processes in atmospheric general circulation model simulations

    E-Print Network [OSTI]

    Lo, Min-Hui; Famiglietti, James S

    2011-01-01

    LO AND FAMIGLIETTI: PRECIPITATION RESPONSE TO LAND PROCESSES2006), Regional tropical precipitation change mechanisms inrobustness of tropical precipitation asymmetry, J. Clim. ,

  16. Single-Column Modeling A Stratiform Cloud Parameterization for General Circulation Models

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effect Photovoltaics -7541 UnlimitedShiftwater vapor andParticle DatabaseC.J.A

  17. General Relativity

    E-Print Network [OSTI]

    Canuto, V

    2015-01-01

    This is an English translation of the Italian version of an encyclopedia chapter that appeared in the Italian Encyclopedia of the Physical Sciences, edited by Bruno Bertotti (1994). Following requests from colleagues we have decided to make it available to a more general readership. We present the motivation for constructing General Relativity, provide a short discussion of tensor algebra, and follow the set up of Einstein equations. We discuss briefly the initial value problem, the linear approximation and how should non gravitational physics be described in curved spacetime.

  18. General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities NuclearlongGeneral Tables The General Tables for

  19. General Engineer

    Broader source: Energy.gov [DOE]

    EEREs mission is to create and sustain American leadership in the global transition to a clean energy economy through high-impact research, development, and demonstration and by breaking down...

  20. ARM Climate Research Facility Annual Report 2004

    SciTech Connect (OSTI)

    Voyles, J.

    2004-12-31

    Like a rock that slowly wears away beneath the pressure of a waterfall, planet earth?s climate is almost imperceptibly changing. Glaciers are getting smaller, droughts are lasting longer, and extreme weather events like fires, floods, and tornadoes are occurring with greater frequency. Why? Part of the answer is clouds and the amount of solar radiation they reflect or absorb. These two factors clouds and radiative transfer represent the greatest source of error and uncertainty in the current generation of general circulation models used for climate research and simulation. The U.S. Global Change Research Act of 1990 established an interagency program within the Executive Office of the President to coordinate U.S. agency-sponsored scientific research designed to monitor, understand, and predict changes in the global environment. To address the need for new research on clouds and radiation, the U.S. Department of Energy (DOE) established the Atmospheric Radiation Measurement (ARM) Program. As part of the DOE?s overall Climate Change Science Program, a primary objective of the ARM Program is improved scientific understanding of the fundamental physics related to interactions between clouds and radiative feedback processes in the atmosphere.

  1. Research Laboratories General Motors Corporation General Motors Technical Center

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouth DakotaRobbins and700 GJO-2003-411-TACe -' RIDGE NATIONAL :UN4 MI.

  2. Recent progress on Exxon's circulating zinc bromine battery system

    SciTech Connect (OSTI)

    Bellows, R.J.

    1981-01-01

    The design, performance, and factory cost of Exxon's circulating zinc bromine batteries are described. The Exxon system has demonstrated stable performance in scale-ups to 3- and 10-kWh sub-modules. Cost studies based on recently demonstrated extrusion and injection molding techniques, have shown that this battery, with plastic electrodes, bipolar stacks, Br/sub 2/ complexation, and circulating electrolytes, could be produced (20 kWh units, 100,000 units/year) at a factory cost of $28/kWh (excluding R.O.I., and various indirect overheads).

  3. Decadal variability of the Atlantic Meridional Overturning Circulation

    E-Print Network [OSTI]

    Buckley, Martha Weaver

    2011-01-01

    In the mean, the Atlantic Ocean transports 1 to 1.5 PW of heat northward, and estimates suggest that 60% of this heat transport is associated with a circulation that reaches the cold waters of the abyss. Due to the role ...

  4. Modeling the Circulation in Penobscot Bay, Maine Huijie Xue1

    E-Print Network [OSTI]

    Xiu, Peng

    Xue et al1 Modeling the Circulation in Penobscot Bay, Maine Huijie Xue1 , Yu Xu1 , David Brooks2 , Neal Pettigrew1 , John Wallinga1 1. School of Marine Sciences, University of Maine, Orono, ME 04469 Penobscot Bay, with approximate dimensions 50 x 100 km, is the largest estuarine embayment along the Maine

  5. FLORIDA STATE UNIVERSITY GENERAL BULLETIN

    E-Print Network [OSTI]

    Sexual Harassment Policy................................9 Conflicts of Interest). The Florida State University Undergraduate Edition of the General Bulletin is published annually in June...................................19 Academic Degree and Certificate Programs..........21 Research Facilities and Special Programs

  6. GEOPHYSICAL RESEARCH LETTERS Supporting Information for "Eddy-mediated

    E-Print Network [OSTI]

    Stewart, Andrew

    GEOPHYSICAL RESEARCH LETTERS Supporting Information for "Eddy-mediated transport of warm, and over- turning circulation. 1 Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, California, USA. 2 Environmental Sciences and Engineering, California

  7. Benchmarking assessment of RELAP5/MOD3 for the low flow and natural circulation experiment

    SciTech Connect (OSTI)

    Martin, R.P. (EG and G Idaho, Inc., Idaho Falls, ID (United States)); Taylor, B.K. (Westinghouse Savannah River Co., Aiken, SC (United States))

    1992-01-01

    The RELAP5/MOD3 code was assessed against experimental thermal hydraulics data for a 12.5 foot test section comprised of two vertical concentric tubes with water flowing upward in the tubes. The inner tubewas stainless steel and uniformly heated. ne outer tube was transparent polycarbonate (lexan) and unheated. The experimental procedure incorporated a test matrix of 24 tests to address single- and two-phase flow, forced and natural circulation flow and heated and unheated fluid. The tests were conducted at system pressures of 14.7 and 17.0 psia. Nine of the tests representing the full range of test conditions were analyzed using RELAP5/MOD3. RELAP5/MOD3 analysis of the tests yielded general agreement with experiment with regard to the prediction of forced flow and natural circulation trends. However, a number of deficiencies were observed in the RELAP5/MOD3 treatment and these, along with recommendations for their resolution, are described in the paper.

  8. Benchmarking assessment of RELAP5/MOD3 for the low flow and natural circulation experiment

    SciTech Connect (OSTI)

    Martin, R.P. [EG and G Idaho, Inc., Idaho Falls, ID (United States); Taylor, B.K. [Westinghouse Savannah River Co., Aiken, SC (United States)

    1992-11-01

    The RELAP5/MOD3 code was assessed against experimental thermal hydraulics data for a 12.5 foot test section comprised of two vertical concentric tubes with water flowing upward in the tubes. The inner tubewas stainless steel and uniformly heated. ne outer tube was transparent polycarbonate (lexan) and unheated. The experimental procedure incorporated a test matrix of 24 tests to address single- and two-phase flow, forced and natural circulation flow and heated and unheated fluid. The tests were conducted at system pressures of 14.7 and 17.0 psia. Nine of the tests representing the full range of test conditions were analyzed using RELAP5/MOD3. RELAP5/MOD3 analysis of the tests yielded general agreement with experiment with regard to the prediction of forced flow and natural circulation trends. However, a number of deficiencies were observed in the RELAP5/MOD3 treatment and these, along with recommendations for their resolution, are described in the paper.

  9. Predictive models of circulating fluidized bed combustors. 12th technical progress report

    SciTech Connect (OSTI)

    Gidaspow, D.

    1992-07-01

    Steady flows influenced by walls cannot be described by inviscid models. Flows in circulating fluidized beds have significant wall effects. Particles in the form of clusters or layers can be seen to run down the walls. Hence modeling of circulating fluidized beds (CFB) without a viscosity is not possible. However, in interpreting Equations (8-1) and (8-2) it must be kept in mind that CFB or most other two phase flows are never in a true steady state. Then the viscosity in Equations (8-1) and (8-2) may not be the true fluid viscosity to be discussed next, but an Eddy type viscosity caused by two phase flow oscillations usually referred to as turbulence. In view of the transient nature of two-phase flow, the drag and the boundary layer thickness may not be proportional to the square root of the intrinsic viscosity but depend upon it to a much smaller extent. As another example, liquid-solid flow and settling of colloidal particles in a lamella electrosettler the settling process is only moderately affected by viscosity. Inviscid flow with settling is a good first approximation to this electric field driven process. The physical meaning of the particulate phase viscosity is described in detail in the chapter on kinetic theory. Here the conventional derivation resented in single phase fluid mechanics is generalized to multiphase flow.

  10. Research project on CO{sub 2}-induced climate change. Annual progress report, March 1, 1994--February 28, 1995

    SciTech Connect (OSTI)

    Cess, R.D.; Hameed, S.

    1995-01-01

    This summarizes current progress in the research project at SUNY Stony Brook on CO2-induced climate change. Three tasks are described, corresponding to the task categories in the USDOE/PRC CAS cooperative project on climate change. Task 1, led by Dr. Robert Cess, concerns the intercomparison of CO2 related climatic warming in contemporary general circulation models. Task 2, directed by Dr. Sultan Hameed, looks at understanding the natural variability in climatic data and comparing its significant features between observations and model simulations. Task 3, also directed by Dr. Hameed focuses on analysis of historical climate data developed at the institute of Geography of the Chinese Academy of Sciences.

  11. The circulation of the ocean is usually divided into two parts, a wind-driven circulation that

    E-Print Network [OSTI]

    measurements show that the thermohaline circulation turns over all the deep water in the ocean every 600 years, in the formation of new deep water in the North Atlantic and the Southern Ocean. Large volumes of cold polar water occurs and how upwelled deep water returns to the areas of deep-water formation. The main new development

  12. General Publications

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities Nuclearlong version)shortGateGeneralMotors

  13. General Recommendations

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities Nuclearlong version)shortGateGeneralMotors»

  14. GENERAL ASSIGNMENT

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERAL ASSIGNMENT KNOW ALL MEN BY THESE

  15. Course Syllabus Chem 451: General Biochemistry

    E-Print Network [OSTI]

    Wagner, Diane

    Course Syllabus Chem 451: General Biochemistry Course Name: Chem 451: General Biochemistry of Chemistry and Biochemistry Arctic Health Research Building Rm 228 Research: Arctic Health Research Building of Biochemistry 4th or 5th ed. Author: David L. Nelson and Michael M. Cox W.H. Freeman and Company ISBN: 0

  16. Experimental Study of the Circulation Air Volume of Recirculation Evaporative Cooling 

    E-Print Network [OSTI]

    Xiong, J.; Liu, Z.; Wang, C.; Chen, G.

    2006-01-01

    This paper introduces the technology of re-circulation evaporative cooling (REC), which uses a portion of supply air as secondary air to make cool water used to indirectly cool outside air through a heat exchanger. The circulation volume...

  17. A self-circulating heat exchanger for use in stirling andthermoacoust...

    Office of Scientific and Technical Information (OSTI)

    Conference: A self-circulating heat exchanger for use in stirling and thermoacoustic-stirling engines Citation Details In-Document Search Title: A self-circulating heat exchanger...

  18. Localization of Deep Water Formation: Role of Atmospheric Moisture Transport and Geometrical Constraints on Ocean Circulation

    E-Print Network [OSTI]

    Marshall, John C.

    A series of coupled atmosphere–ocean–ice aquaplanet experiments is described in which topological constraints on ocean circulation are introduced to study the role of ocean circulation on the mean climate of the coupled ...

  19. Research Misconduct (Research Integrity

    E-Print Network [OSTI]

    Wapstra, Erik

    Research Misconduct (Research Integrity Coordinator report) Glossary ADR Associate Dean Research ANDS Australian National Data Sharing ITS Information Technology Services NeCTAR National eResearch Collaboration Tools and Resources RSDI Research Storage Data Infrastructure input Research Integrity Advisors

  20. The effect of a hydraulic parameterisation of overflows on the ocean circulation

    E-Print Network [OSTI]

    Born, Andreas

    eine Bistabilit¨at erm¨oglichen. #12;Contents 1 Introduction 7 2 The circulation in the Atlantic Ocean

  1. Interdisciplinary: Research General Engineer/Physical Scientist

    Broader source: Energy.gov [DOE]

    *1 Position exists that may be filled at Morgantown, WV or Albany, OR. This position is located in the Thermal Sciences Division (TSD). The TSD develops experimental techniques and data for the...

  2. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid you notHeat Pumps Heat PumpsfacilityviaGas AdsorptionInvention

  3. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and Hybrid IntroScientific

  4. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and Hybrid IntroScientificSultan Shair

  5. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and Hybrid IntroScientificSultan

  6. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and Hybrid IntroScientificSultanAmol

  7. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and Hybrid

  8. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi Bruno Betoni

  9. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi Bruno BetoniLeao

  10. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi Bruno

  11. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi BrunoFabio

  12. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi BrunoFabioHari NS

  13. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi BrunoFabioHari

  14. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni Parodi

  15. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni ParodiPrasanth Kumar

  16. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni ParodiPrasanth

  17. Inventors Behind General Electric | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation CurrentHenryInhibitingInteractivePGAS and HybridBetoni ParodiPrasanthSundeep

  18. AcceptedArticleThe effect of moist convection on thermally induced mesoscale circulations

    E-Print Network [OSTI]

    Gentine, Pierre

    AcceptedArticleThe effect of moist convection on thermally induced mesoscale circulations Malte of thermally induced mesoscale circulations rests primarily on observations and model studies of dry convection-eddy simulations are used to investigate the effect of moist convection on an idealized mesoscale circulation

  19. Wave Energy Converter (WEC) Array Effects on Wave Current and Sediment Circulation: Monterey Bay CA.

    SciTech Connect (OSTI)

    Roberts, Jesse D.; Jones, Craig; Magalen, Jason

    2014-09-01

    The goal s of this study were to develop tools to quantitatively characterize environments where wave energy converter ( WEC ) devices may be installed and to assess e ffects on hydrodynamics and lo cal sediment transport. A large hypothetical WEC array was investigated using wave, hydrodynamic, and sediment transport models and site - specific average and storm conditions as input. The results indicated that there were significant changes in sediment s izes adjacent to and in the lee of the WEC array due to reduced wave energy. The circulation in the lee of the array was also altered; more intense onshore currents were generated in the lee of the WECs . In general, the storm case and the average case show ed the same qualitative patterns suggesting that these trends would be maintained throughout the year. The framework developed here can be used to design more efficient arrays while minimizing impacts on nearshore environmen ts.

  20. Dependence of heat transport on the strength and shear rate of prescribed circulating flows

    E-Print Network [OSTI]

    Emily S. C. Ching; K. M. Pang

    2001-11-28

    We study numerically the dependence of heat transport on the maximum velocity and shear rate of physical circulating flows, which are prescribed to have the key characteristics of the large-scale mean flow observed in turbulent convection. When the side-boundary thermal layer is thinner than the viscous boundary layer, the Nusselt number (Nu), which measures the heat transport, scales with the normalized shear rate to an exponent 1/3. On the other hand, when the side-boundary thermal layer is thicker, the dependence of Nu on the Peclet number, which measures the maximum velocity, or the normalized shear rate when the viscous boundary layer thickness is fixed, is generally not a power law. Scaling behavior is obtained only in an asymptotic regime. The relevance of our results to the problem of heat transport in turbulent convection is also discussed.

  1. Polymer grouts for plugging lost circulation in geothermal wells.

    SciTech Connect (OSTI)

    Galbreath, D. (Green Mountain International, Waynesvile, NC); Mansure, Arthur James; Bauer, Stephen J.

    2004-12-01

    We have concluded a laboratory study to evaluate the survival potential of polymeric materials used for lost circulation plugs in geothermal wells. We learned early in the study that these materials were susceptible to hydrolysis. Through a systematic program in which many potential chemical combinations were evaluated, polymers were developed which tolerated hydrolysis for eight weeks at 500 F. The polymers also met material, handling, cost, and emplacement criteria. This screening process identified the most promising materials. A benefit of this work is that the components of the polymers developed can be mixed at the surface and pumped downhole through a single hose. Further strength testing is required to determine precisely the maximum temperature at which extrusion through fractures or voids causes failure of the lost circulation plug.

  2. The Role of Subtropical Irreversible PV Mixing in the Zonal Mean Circulation Response to Global Warming-like Thermal Forcing

    SciTech Connect (OSTI)

    Lu, Jian; Sun, Lantao; Wu, Yutian; Chen, Gang

    2014-03-15

    The atmospheric circulation response to the global warming-like tropical upper tropospheric heating is revisited using a dry atmospheric general circulation model (AGCM) in light of a new diagnostics based on the concept of finite-amplitude wave activity (FAWA) on equivalent latitude. For a given tropical heating profile, the linear Wentzel-Kramers-Brillouin (WKB) wave refraction analysis sometimes gives a very different and even opposite prediction of the eddy momentum flux response to that of the actual full model simulation, exposing the limitation of the traditional linear approach in understanding the full dynamics of the atmospheric response under global warming. The implementation of the FAWA diagnostics reveals that in response to the upper tropospheric heating, effective diffusivity, a measure of the mixing efficiency, increases and advances upward and poleward in the subtropics and the resultant enhancement and the poleward encroachment of eddy potential vorticity mixing leads to a poleward displaced potential vorticity (PV) gradient peak in the upper troposphere. The anomalous eddy PV flux, in balance with the PV dissipation, gives rise to a poleward shift in the eddy-driven jet and eddy-driven mean meridional circulation. Sensitivity experiments show that these irreversible dissipation processes in the upper troposphere are robust, regardless of the width of the tropical heating.

  3. On the circulation and stratification of the Weddell Gyre 

    E-Print Network [OSTI]

    Orsi, Alejandro H.

    1990-01-01

    , and probably also in deep water formation over the continental margins of the eastern sector. Within the ACC the upper portion of the CDW is characterized by a temperature maximum (8-max) and oxygen minimum (~-min). The lower part of the CDW (LCDW... on selected isopycnals. South of the eastward-flowing Antarctic Circumpolar Current, the Weddell Gyre is revealed as a weakly-sheared circulation elongated in the southwest-to-northeast direction. Southward penetration of Circumpolar Deep Water (CDW...

  4. Circulant conference matrices for new complex Hadamard matrices

    E-Print Network [OSTI]

    Petre Dita

    2011-07-07

    The circulant real and complex matrices are used to find new real and complex conference matrices. With them we construct Sylvester inverse orthogonal matrices by doubling the size of inverse complex conference matrices. When the free parameters take values on the unit circle the inverse orthogonal matrices transform into complex Hadamard matrices. The method is used for $n=6$ conference matrices and in this way we find new parametrisations of Hadamard matrices for dimension $ n=12$.

  5. Modeling International Relationships in Applied General Equilibrium...

    Open Energy Info (EERE)

    in Applied General Equilibrium (MIRAGE) AgencyCompany Organization: International Food Policy Research Institute, Centre d'Etudes Prospectives et d'Informations...

  6. Joseph Lipman Research Publications

    E-Print Network [OSTI]

    RESEARCH PUBLICATIONS of JOSEPH LIPMAN. For more information see Reviews. 1. A generalization of Ceva's theorem. Amer. Math. Monthly 67 (1960) ...

  7. PPPL and General Atomics scientists make breakthrough in understanding...

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

    shows a response that was ineffective. Simulation by General Atomics. Researchers from General Atomics and the U.S. Department of Energy's Princeton Plasma Physics Laboratory...

  8. FRED HUTCHINSON CANCER RESEARCH CENTER RESEARCH MISCONDUCT POLICY AND PROCEDURES

    E-Print Network [OSTI]

    Brent, Roger

    agencies, the Office of the Inspector General ("OIG") generally carries out enforcement of research of interest. (See: http://www.fhcrc.org/intranet/general_counsel/conflict_interest_2002.pdf) The Center shall and reporting research, its philosophy and policy of dealing with and reporting possible research misconduct

  9. STAG RESEARCH CENTERSTAG RESEARCH

    E-Print Network [OSTI]

    Abrahams, I. David

    STAG RESEARCH CENTERSTAG RESEARCH CENTERSTAG RESEARCH CENTER Postrgraduate study in mathematical physics Marika Taylor Mathematical Sciences and STAG research centre, Southampton December 19, 2014 Marika Taylor (University of Southampton) Mathematical Physics December 19, 2014 1 / 26 #12;STAG RESEARCH

  10. GENERAL RESEARCH Real Options Based Analysis of Optimal Pharmaceutical Research

    E-Print Network [OSTI]

    Maranas, Costas

    planning initiatives of a pharmaceutical company. Every drug in a pharmaceutical pipeline undergoes a well from a set of 20 candidate drugs at different stages in the developmental pipeline over a planning horizon of 6 years. This proposed framework provides a road map for future decisions by tracking

  11. HTGR-SC/C program baseline review meeting, Session IIC: circulators, C and I, and helium service

    SciTech Connect (OSTI)

    Not Available

    1981-01-01

    Information is presented concerning main and auxiliary circulators; reactor service equipment; and control and instrumentation systems.

  12. ATMOSPHERIC CIRCULATION OF BROWN DWARFS: JETS, VORTICES, AND TIME VARIABILITY

    SciTech Connect (OSTI)

    Zhang, Xi; Showman, Adam P.

    2014-06-10

    A variety of observational evidence demonstrates that brown dwarfs exhibit active atmospheric circulations. In this study we use a shallow-water model to investigate the global atmospheric dynamics in the stratified layer overlying the convective zone on these rapidly rotating objects. We show that the existence and properties of the atmospheric circulation crucially depend on key parameters including the energy injection rate and radiative timescale. Under conditions of strong internal heat flux and weak radiative dissipation, a banded flow pattern comprised of east-west jet streams spontaneously emerges from the interaction of atmospheric turbulence with the planetary rotation. In contrast, when the internal heat flux is weak and/or radiative dissipation is strong, turbulence injected into the atmosphere damps before it can self-organize into jets, leading to a flow dominated by transient eddies and isotropic turbulence instead. The simulation results are not very sensitive to the form of the forcing. Based on the location of the transition between jet-dominated and eddy-dominated regimes, we suggest that many brown dwarfs may exhibit atmospheric circulations dominated by eddies and turbulence (rather than jets) due to the strong radiative damping on these worlds, but a jet structure is also possible under some realistic conditions. Our simulated light curves capture important features from observed infrared light curves of brown dwarfs, including amplitude variations of a few percent and shapes that fluctuate between single-peak and multi-peak structures. More broadly, our work shows that the shallow-water system provides a useful tool to illuminate fundamental aspects of the dynamics on these worlds.

  13. Experimental analysis of the mechanics of reverse circulation air lift 

    E-Print Network [OSTI]

    Zeineddine, Talal Ibrahim

    1980-01-01

    investigation of the two-phase air-water flow in the lifting pipe of an air lift pump model was conducted. The effect of the diffuser design on the efficiency of the pump was then determined. The experimental study consisted of measuring the void frac- tion... circulation air lift device as a function of diffuser configuration. The two-phase flow in the vertical lifting pipe of the pump was studied in detail so that the flow parameters and their variations across and along the pipe were investigated...

  14. Global Circulating Fluidized Bed Boilers Market | OpenEI Community

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky:BoreOpenGilliamOhio: EnergyGlenwillow,Iowa:BusCirculating

  15. General Motors Clean Combustion Engines Advanced

    E-Print Network [OSTI]

    Siefert, Chris

    General Motors Clean Combustion Engines Advanced with Predictive Simulation Tools Sandia National Laboratories (SNL) has been working with General Motors (GM) for over 30 years. In the last few years General Motors n Daniel Dedrick, an SNL researcher, handles a complex metal hydride within an inert

  16. Climate research in the former Soviet Union. FASAC: Foreign Applied Sciences Assessment Center technical assessment report

    SciTech Connect (OSTI)

    Ellingson, R.G.; Baer, F.; Ellsaesser, H.W.; Harshvardhan; Hoffert, M.I.; Randall, D.A.

    1993-09-01

    This report assesses the state of the art in several areas of climate research in the former Soviet Union. This assessment was performed by a group of six internationally recognized US experts in related fields. The areas chosen for review are: large-scale circulation processes in the atmosphere and oceans; atmospheric radiative processes; cloud formation processes; climate effects of natural atmospheric disturbances; and the carbon cycle, paleoclimates, and general circulation model validation. The study found an active research community in each of the above areas. Overall, the quality of climate research in the former Soviet Union is mixed, although the best Soviet work is as good as the best corresponding work in the West. The best Soviet efforts have principally been in theoretical studies or data analysis. However, an apparent lack of access to modern computing facilities has severely hampered the Soviet research. Most of the issues considered in the Soviet literature are known, and have been discussed in the Western literature, although some extraordinary research in paleoclimatology was noted. Little unusual and exceptionally creative material was found in the other areas during the study period (1985 through 1992). Scientists in the former Soviet Union have closely followed the Western literature and technology. Given their strengths in theoretical and analytical methods, as well as their possession of simplified versions of detailed computer models being used in the West, researchers in the former Soviet Union have the potential to make significant contributions if supercomputers, workstations, and software become available. However, given the current state of the economy in the former Soviet Union, it is not clear that the computer gap will be bridged in the foreseeable future.

  17. Intermediate- to Deep-Water Circulation Changes on Short and Long Time Scales 

    E-Print Network [OSTI]

    Murphy, Daniel Patrick

    2012-07-16

    . Deborah Thomas Oceanic circulation remains one of the poorly understood elements of the global climate system, despite its importance to planetary heat redistribution and carbon cycling. The nature of deep-water formation and circulation in ancient... oceans are even more poorly constrained. In order to understand climate dynamics of past and future climates we must have a better understanding of the role of deep-ocean circulation. In this dissertation I investigated changes in intermediate...

  18. Mixing energy analysis of Bingham plastic fluids for severe lost circulation prevention using similitude 

    E-Print Network [OSTI]

    Massingill, Robert Derryl, Jr.

    2006-04-12

    , efforts have been focused on developing new Lost Circulation Materials (LCM?s) that are more effective and that minimize the operation costs by achieving sufficient FCS to allow drilling to continue.7,8 A variety of products have been proposed with a... chemical lost circulation treatments have emerged that focus on rapid application and effectively widening the mud weight window, therefore, minimizing drilling costs. Among the most popular LCM?s used while treating minor lost circulations are blended...

  19. Negative Binomial-Generalized Exponential Distribution: Generalized Linear Model and its Applications 

    E-Print Network [OSTI]

    Vangala, Prathyusha

    2015-05-06

    Modelling crash data has been an integral part of the research done in highway safety. Different tools have been suggested by researchers to analyze crash data. One such tool, which was recently proposed, is the Negative Binomial Generalized...

  20. MARINE RESEARCH Volume 66, Number 1

    E-Print Network [OSTI]

    Journal of MARINE RESEARCH Volume 66, Number 1 Mean energy balance in the tropical Pacific Ocean requires energy input from the wind. Previous studies estimate that the mean rate of wind work (or wind global energy input into the ocean circulation, it is also critical in maintaining the east-west tilt

  1. The Low-Energy State of Circulating Stored Ion Beams: Crystalline Beams

    E-Print Network [OSTI]

    Wei, J.

    2008-01-01

    Proc. of the Workshop on Crystalline Ion Beams, Werheim,Critical Temperatures for Crystalline Beams", Proc. of theCirculating Stored Ion Beams: Crystalline Beams J. Wei, X. -

  2. Intermediate-depth circulation of the Indian and South Pacific Oceans measured by autonomous floats

    E-Print Network [OSTI]

    Davis, Russ E

    2005-01-01

    circulation of the Pacific Ocean: Flow patterns, tracers,the Indian and South Pacific Oceans Measured by Autonomousthe tropical and South Pacific Ocean and 228 were deployed

  3. Estimating the solar meridional circulation by normal mode decomposition

    E-Print Network [OSTI]

    Lars Krieger; Markus Roth; Oskar von der Luehe

    2008-11-05

    The objective of this article is to use Fourier-Hankel decomposition as suggested earlier by Braun & Fan (1998) to estimate the integrated horizontal meridional flow velocity as a function of mode penetration depth, and to find ways of potentially improve this technique. We use a time series of 43200 (30 days) consecutive full-disk Dopplergrams obtained by the MDI (Michelson Doppler Imager) instrument aboard the SOHO (Solar Heliospheric Observatory) spacecraft in April 1999. We find averaged meridional flow estimates of 15 m/s for modes with a penetration depth in the upper 20 Mm of the solar convection zone. This reproduces the results of the earlier investigations. Moreover we conclude that this method has the potential to become a new technique to measure the meridional circulation in the deep convection zone, if some improvements will be applied.

  4. Options for Cryogenic Load Cooling with Forced Flow Helium Circulation

    SciTech Connect (OSTI)

    Peter Knudsen, Venkatarao Ganni, Roberto Than

    2012-06-01

    Cryogenic pumps designed to circulate super-critical helium are commonly deemed necessary in many super-conducting magnet and other cooling applications. Acknowledging that these pumps are often located at the coldest temperature levels, their use introduces risks associated with the reliability of additional rotating machinery and an additional load on the refrigeration system. However, as it has been successfully demonstrated, this objective can be accomplished without using these pumps by the refrigeration system, resulting in lower system input power and improved reliability to the overall cryogenic system operations. In this paper we examine some trade-offs between using these pumps vs. using the refrigeration system directly with examples of processes that have used these concepts successfully and eliminated using such pumps

  5. Modeling of a coal-fired natural circulation boiler

    SciTech Connect (OSTI)

    Bhambare, K.S.; Mitra, S.K.; Gaitonde, U.N.

    2007-06-15

    Modeling of a natural circulation boiler for a coal-fired thermal power station is presented here. The boiler system is divided into seven subcomponents, and for each section, models based on conservation of mass, momentum, and energy are formulated. The pressure drop at various sections and the heat transfer coefficients are computed using empirical correlations. Solutions are obtained by using SIMULINK. The model is validated by comparing its steady state and dynamic responses with the actual plant data. Open loop responses of the model to the step changes in the operating parameters, such as pressure, temperature, steam flow, feed water flow, are also analyzed. The present model can be used for the development and design of effective boiler control systems.

  6. Doppler Signatures of the Atmospheric Circulation on Hot Jupiters

    E-Print Network [OSTI]

    Showman, Adam P; Lewis, Nikole K; Shabram, Megan

    2013-01-01

    The meteorology of hot Jupiters has been characterized primarily with thermal measurements, but recent observations suggest the possibility of directly detecting the winds by observing the Doppler shift of spectral lines seen during transit. Motivated by these observations, we show how Doppler measurements can place powerful constraints on the meteorology. We show that the atmospheric circulation--and Doppler signature--of hot Jupiters splits into two regimes. Under weak stellar insolation, the day-night thermal forcing generates fast zonal jet streams from the interaction of atmospheric waves with the mean flow. In this regime, air along the terminator (as seen during transit) flows toward Earth in some regions and away from Earth in others, leading to a Doppler signature exhibiting superposed blue- and redshifted components. Under intense stellar insolation, however, the strong thermal forcing damps these planetary-scale waves, inhibiting their ability to generate jets. Strong frictional drag likewise damps...

  7. The stability of the thermohaline circulation in global warming experiments

    SciTech Connect (OSTI)

    Schmittner, A.; Stocker, T.F.

    1999-04-01

    A simplified climate model of the coupled ocean-atmosphere system is used to perform extensive sensitivity studies concerning possible future climate change induced by anthropogenic greenhouse gas emissions. Supplemented with an active atmospheric hydrological cycle, experiments with different rates of CO{sub 2} increase and different climate sensitivities are performed. The model exhibits a threshold value of atmospheric CO{sub 2} concentration beyond which the North Atlantic Deep Water formation stops and never recovers. For a climate sensitivity that leads to an equilibrium warming of 3.6 C for a doubling of CO{sub 2} and a rate of CO{sub 2} increase of 1% yr{sup {minus}1}, the threshold lies between 650 and 700 ppmv. Moreover, it is shown that the stability of the thermohaline circulation depends on the rate of increase of greenhouse gases. For a slower increase of atmospheric pCO{sub 2} the final amount that can be reached without a shutdown of the circulation is considerably higher. This rate-sensitive response is due to the uptake of heat and excess freshwater from the uppermost layers to the deep ocean. The increased equator-to-pole freshwater transport in a warmer atmosphere is mainly responsible for the cessation of deep water formation in the North Atlantic. Another consequence of the enhanced latent heat transport is a stronger warming at high latitudes. A model version with fixed water vapor transport exhibits uniform warming at all latitudes. The inclusion of a simple parameterization of the ice-albedo feedback increases the model sensitivity and further decreases the pole-to-equator temperature difference in a greenhouse climate. The possible range of CO{sub 2} threshold concentrations and its dependency on the rate of CO{sub 2} increase, on the climate sensitivity, and on other model parameters are discussed.

  8. DEEP SEA RESEARCH PART II Circulation in the Eastern Bering Sea: Inferences

    E-Print Network [OSTI]

    Kurapov, Alexander

    of the North Pacific and Gulf of Alaska coastal currents connect with the Bering Sea basin and shelf through of Alaska, Fairbanks, Alaska, 99775, USA December 18, 2013, 1:54pm DRAFT #12;X - 2 DURSKI ET AL.: CIRC. EAST in determining the pattern of erosion of the water mass as the shelf warms and mixes. On the Bering Sea Shelf

  9. Deep-Sea Research II 52 (2005) 18021826 Observed deep circulation in the Ulleung Basin

    E-Print Network [OSTI]

    Rhode Island, University of

    2005-01-01

    .: +1 228 688 4734; fax: +1 228 688 5997. E-mail address: teague@nrlssc.navy.mil (W.J. Teague). #12;in

  10. Research papers The vertical structure of time-mean estuarine circulation in a shallow,

    E-Print Network [OSTI]

    Polton, Jeff

    gradients and surface wind stress. At small scales (of order metres or less) nonlinear turbulent dissipation , Matthew R. Palmer, M.J. Howarth National Oceanography Centre, Joseph Proudman Building, Liverpool L3 5DA are small compared to the instantaneous tidal velocities and yet of key importance for determining the fate

  11. Author's personal copy Sensitivity of the Atlantic Ocean circulation to a hydraulic overflow

    E-Print Network [OSTI]

    Levermann, Anders

    Author's personal copy Sensitivity of the Atlantic Ocean circulation to a hydraulic overflow the explicit representation of the overflows using a parameterisation by hydraulic constraints and compare circulation (AMOC) (Redler and Böning, 1997; Kuhlbrodt et al., 2007). The potential energy stored in the dense

  12. Control of the ocean circulation by boundaries and topography P.B. Rhines

    E-Print Network [OSTI]

    energy in the ocean circulation is dominated by boundary currents, zonal jets and mesoscale eddies and jet-like zonal currents dominate the kinetic energy of the world ocean. They are key features of bothControl of the ocean circulation by boundaries and topography P.B. Rhines University of Washington

  13. 1 Drivers of the projected changes to the Pacific Ocean 2 equatorial circulation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Drivers of the projected changes to the Pacific Ocean 2 equatorial circulation 3 A. Sen Gupta,1 A), 29 Drivers of the projected changes to the Pacific Ocean equatorial 30 circulation, Geophys. Res. Lett., 39, LXXXXX, doi:10.1029/ 31 2012GL051447. 32 1. Introduction 33 [2] The equatorial Pacific Ocean

  14. A regional numerical ocean model of the circulation in the Bay of Biscay

    E-Print Network [OSTI]

    Drijfhout, Sybren

    A regional numerical ocean model of the circulation in the Bay of Biscay Y. Friocourt,1,2,3 B Peninsula and in the Bay of Biscay is investigated by means of a regional ocean model. In particular numerical ocean model of the circulation in the Bay of Biscay, J. Geophys. Res., 112, C09008, doi:10

  15. Mesoscale circulations and atmospheric CO2 variations in the Tapajos Region, Para, Brazil

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Mesoscale circulations and atmospheric CO2 variations in the Tapajo´s Region, Para´, Brazil Lixin; published 2 November 2005. [1] We have investigated mesoscale circulations and atmospheric CO2 variations over a heterogeneous landscape of forests, pastures, and large rivers during the Santare´m Mesoscale

  16. The Circulation of Tampa Bay Driven by Buoyancy, Tides and Winds, as Simulated

    E-Print Network [OSTI]

    Meyers, Steven D.

    1 The Circulation of Tampa Bay Driven by Buoyancy, Tides and Winds, as Simulated using a Finite by rivers, tides and winds. Because of a mean wind velocity vector directed down the estuary axis we ran a parallel model experiment without winds to distinguish the estuarine circulation by gravitational

  17. Sensitivity of the Overturning Circulation in the Southern Ocean to Decadal Changes in Wind Forcing

    E-Print Network [OSTI]

    Naveira Garabato, Alberto

    Sensitivity of the Overturning Circulation in the Southern Ocean to Decadal Changes in Wind Forcing circulation in the Southern Ocean to the recent decadal strengthening of the overlying winds is being to changes in winds. Fundamental to reconciling these diverse views is to un- derstand properly the role

  18. On the role of topography and wind stress on the stability of the thermohaline circulation

    E-Print Network [OSTI]

    Edwards, Neil

    On the role of topography and wind stress on the stability of the thermohaline circulation Neil R or absence of wind stress. If the ow exhibits collapses we consider how topography and wind stress a ect the circulation by modifying the barotropic ow and reducing the depth of convection. Wind stress stabilizes

  19. Paleogene deepwater mass composition of the tropical Pacific and implications for thermohaline circulation in a greenhouse

    E-Print Network [OSTI]

    Thomas, Debbie

    circulation in a greenhouse world Deborah J. Thomas and Mitchell Lyle Department of Oceanography, Texas A Ocean likely exerted the greatest marine influence on climate during the greenhouse interval and implications for thermohaline circulation in a greenhouse world, Geochem. Geophys. Geosyst., 9, Q02002, doi:10

  20. Lyapunov Exponents of a Simple Stochastic Model of the Thermally and Wind-Driven Ocean Circulation

    E-Print Network [OSTI]

    Monahan, Adam Hugh

    Lyapunov Exponents of a Simple Stochastic Model of the Thermally and Wind-Driven Ocean Circulation, then the leading Lyapunov exponent of the circulation can become positive for sufficiently strong fluctuations of the leading Lyapunov exponent can have a substantial effect on the predictability of the system. 1 #12

  1. Circulation during intermittent lung ventilation in the ~artel" snake Thamnophis WARREN B URG(;RFS

    E-Print Network [OSTI]

    Burggren, Warren

    I .'11 Circulation during intermittent lung ventilation in the ~artel" snake Thamnophis WARREN B" Vi'lllW5 Received April 26, 1'177 RU\\lung "/-'r1t relationship, within the central arterial circulation ",'ere observed during intermittent. voluntary lung

  2. Wind- and Buoyancy-modulated Along-shore Circulation over the Texas-Louisiana Shelf 

    E-Print Network [OSTI]

    Zhang, Zhaoru

    2013-07-22

    Numerical experiments are used to study the wind- and buoyancy-modulated along-shore circulation over the Texas-Louisiana continental shelf inshore of 50-m water depth. Most attention is given to circulation in the non-summer flow regime. A major...

  3. Combustion of municipal solid wastes with oil shale in a circulating fluidized bed. Quarterly report, quarter ending 31 December 1994

    SciTech Connect (OSTI)

    Not Available

    1995-01-01

    The test plan is designed to demonstrate that oil shale co-combusted with municipal solid waste (MSW) can reduce gaseous pollutants (SO{sub 2}, CO) to acceptable levels (90%+ reduction) and produce a cementitious ash which will, at a minimum, be acceptable in normal land fills. The small-scale combustion testing will be accomplished in a 6-in. circulating fluid bed combustor (CFBC) at Hazen Research Laboratories. This work will be patterned after the study the authors conducted in 1988 when coal and oil shale were co-combusted in a program sponsored by the Electric Power Research Institute. The specific purpose of the test program will be to: determine the required ratio of oil shale to MSW by determining the ratio of absorbent to pollutant (A/P); determine the effect of temperature and resident time in the reactor; and determine if kinetic model developed for coal/oil shale mixture is applicable.

  4. The Role of Circulation Features on Black Carbon Transport into the Arctic in the Community Atmosphere Model Version 5 (CAM5)

    SciTech Connect (OSTI)

    Ma, Po-Lun; Rasch, Philip J.; Wang, Hailong; Zhang, Kai; Easter, Richard C.; Tilmes, S.; Fast, Jerome D.; Liu, Xiaohong; Yoon, Jin-Ho; Lamarque, Jean-Francois

    2013-05-28

    Current climate models generally under-predict the surface concentration of black carbon (BC) in the Arctic due to the uncertainties associated with emissions, transport, and removal. This bias is also present in the Community Atmosphere Model Version 5.1 (CAM5). In this study, we investigate the uncertainty of Arctic BC due to transport processes simulated by CAM5 by configuring the model to run in an “offline mode” in which the large-scale circulations are prescribed. We compare the simulated BC transport when the offline model is driven by the meteorology predicted by the standard free-running CAM5 with simulations where the meteorology is constrained to agree with reanalysis products. Some circulation biases are apparent: the free-running CAM5 produces about 50% less transient eddy transport of BC than the reanalysis-driven simulations, which may be attributed to the coarse model resolution insufficient to represent eddies. Our analysis shows that the free-running CAM5 reasonably captures the essence of the Arctic Oscillation (AO), but some discernable differences in the spatial pattern of the AO between the free-running CAM5 and the reanalysis-driven simulations result in significantly different AO modulation of BC transport over Northeast Asia and Eastern Europe. Nevertheless, we find that the overall climatological circulation patterns simulated by the free-running CAM5 generally resembles those from the reanalysis products, and BC transport is very similar in both simulation sets. Therefore, the simulated circulation features regulating the long-range BC transport is unlikely the most important cause of the large under-prediction of surface BC concentration in the Arctic.

  5. Determining root causes of drilling problems by combining cases and general knowledge

    E-Print Network [OSTI]

    Aamodt, Agnar

    -based, knowledge intensive, oil well drilling 1 Introduction Drilling of oil wells is an expensive offshore based reasoning to improve efficiency of oil well drilling. Their focus was on lost circulation, whichDetermining root causes of drilling problems by combining cases and general knowledge Samad

  6. Bivariate Generalized Exponential Distribution

    E-Print Network [OSTI]

    Kundu, Debasis

    Bivariate Generalized Exponential Distribution Debasis Kundu and Rameshwar D. Gupta Abstract Recently it is observed that the generalized exponential distribution can be used quite effectively exponential distribution so that the marginals have generalized exponential distributions. It is observed

  7. Wind-driven changes in Southern Ocean residual circulation, ocean carbon reservoirs and atmospheric CO[subscript 2

    E-Print Network [OSTI]

    Lauderdale, Jonathan M.

    The effect of idealized wind-driven circulation changes in the Southern Ocean on atmospheric CO[subscript 2] and the ocean carbon inventory is investigated using a suite of coarse-resolution, global coupled ocean circulation ...

  8. The Fundamentals of Generalized Electrodynamics

    E-Print Network [OSTI]

    A. K. Tomilin

    2008-08-27

    The article presents an alternative approach to the definition of vector electrodynamic potential and its properties. It is shown that generally it has vortical and potential components. The system of differential equations of generalized electrodynamics (the macroscopical theory) is written down; and on the basis of these equations the mechanism of occurrence of the electromagnetic waves spreading in the direction of vector (longitudinal E-waves) is explained. It is demonstrated that the new macroscopical theory is in accordance with quantum electrodynamics. The author investigates the issue of physical pithiness of longitudinal electromagnetic E-waves and specifies the references to the experimental researches confirming the new theory.

  9. Graph searching and a generalized parking function 

    E-Print Network [OSTI]

    Kostic, Dimitrije Nenad

    2009-05-15

    Parking functions have been a focus of mathematical research since the mid-1970s. Various generalizations have been introduced since the mid-1990s and deep relationships between these and other areas of mathematics have ...

  10. A cryogenic circulating advective multi-pass absorption cell

    SciTech Connect (OSTI)

    Stockett, M. H.; Lawler, J. E. [Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706 (United States)

    2012-03-15

    A novel absorption cell has been developed to enable a spectroscopic survey of a broad range of polycyclic aromatic hydrocarbons (PAH) under astrophysically relevant conditions and utilizing a synchrotron radiation continuum to test the still controversial hypothesis that these molecules or their ions could be carriers of the diffuse interstellar bands. The cryogenic circulating advective multi-pass absorption cell resembles a wind tunnel; molecules evaporated from a crucible or injected using a custom gas feedthrough are entrained in a laminar flow of cryogenically cooled buffer gas and advected into the path of the synchrotron beam. This system includes a multi-pass optical White cell enabling absorption path lengths of hundreds of meters and a detection sensitivity to molecular densities on the order of 10{sup 7} cm{sup -3}. A capacitively coupled radio frequency dielectric barrier discharge provides ionized and metastable buffer gas atoms for ionizing the candidate molecules via charge exchange and the Penning effect. Stronger than expected clustering of PAH molecules has slowed efforts to record gas phase PAH spectra at cryogenic temperatures, though such clusters may play a role in other interstellar phenomena.

  11. TRANSPORT BY MERIDIONAL CIRCULATIONS IN SOLAR-TYPE STARS

    SciTech Connect (OSTI)

    Wood, T. S.; Brummell, N. H., E-mail: tsw25@soe.ucsc.edu [Department of Applied Mathematics and Statistics, Baskin School of Engineering, University of California Santa Cruz, CA (United States)

    2012-08-20

    Transport by meridional flows has significant consequences for stellar evolution, but is difficult to capture in global-scale numerical simulations because of the wide range of timescales involved. Stellar evolution models therefore usually adopt parameterizations for such transport based on idealized laminar or mean-field models. Unfortunately, recent attempts to model this transport in global simulations have produced results that are not consistent with any of these idealized models. In an effort to explain the discrepancies between global simulations and idealized models, here we use three-dimensional local Cartesian simulations of compressible convection to study the efficiency of transport by meridional flows below a convection zone in several parameter regimes of relevance to the Sun and solar-type stars. In these local simulations we are able to establish the correct ordering of dynamical timescales, although the separation of the timescales remains unrealistic. We find that, even though the generation of internal waves by convective overshoot produces a high degree of time dependence in the meridional flow field, the mean flow has the qualitative behavior predicted by laminar, 'balanced' models. In particular, we observe a progressive deepening, or 'burrowing', of the mean circulation if the local Eddington-Sweet timescale is shorter than the viscous diffusion timescale. Such burrowing is a robust prediction of laminar models in this parameter regime, but has never been observed in any previous numerical simulation. We argue that previous simulations therefore underestimate the transport by meridional flows.

  12. Circulating fluidized-bed boiler makes inroads for waste recycling

    SciTech Connect (OSTI)

    1995-09-01

    Circulating fluidized-bed (CFB) boilers have ben used for years in Scandinavia to burn refuse-derived fuel (RDF). Now, Foster Wheeler Power Systems, Inc., (Clinton, N.J.) is bringing the technology to the US. Touted as the world`s largest waste-to-energy plant to use CFB technology, the Robbins (III.) Resource Recovery Facility will have the capacity to process 1,600 tons/d of municipal solid waste (MSW) when it begins operation in early 1997. The facility will have two materials-separation and RDF-processing trains, each with dual trommel screens, magnetic and eddy current separators, and shredders. About 25% of the incoming MSW will be sorted and removed for recycling, while 75% of it will be turned into fuel, with a heat value of roughly 6,170 btu/lb. Once burned in the twin CFB boilers the resulting steam will be routed through a single turbine generator to produce 50,000 mW of electric power.

  13. Uncertainty quantification for large-scale ocean circulation predictions.

    SciTech Connect (OSTI)

    Safta, Cosmin; Debusschere, Bert J.; Najm, Habib N.; Sargsyan, Khachik

    2010-09-01

    Uncertainty quantificatio in climate models is challenged by the sparsity of the available climate data due to the high computational cost of the model runs. Another feature that prevents classical uncertainty analyses from being easily applicable is the bifurcative behavior in the climate data with respect to certain parameters. A typical example is the Meridional Overturning Circulation in the Atlantic Ocean. The maximum overturning stream function exhibits discontinuity across a curve in the space of two uncertain parameters, namely climate sensitivity and CO{sub 2} forcing. We develop a methodology that performs uncertainty quantificatio in the presence of limited data that have discontinuous character. Our approach is two-fold. First we detect the discontinuity location with a Bayesian inference, thus obtaining a probabilistic representation of the discontinuity curve location in presence of arbitrarily distributed input parameter values. Furthermore, we developed a spectral approach that relies on Polynomial Chaos (PC) expansions on each sides of the discontinuity curve leading to an averaged-PC representation of the forward model that allows efficient uncertainty quantification and propagation. The methodology is tested on synthetic examples of discontinuous data with adjustable sharpness and structure.

  14. ESTABLISHMENT OF AN ENVIRONMENTAL CONTROL TECHNOLOGY LABORATORY WITH A CIRCULATING FLUIDIZED-BED COMBUSTION SYSTEM

    SciTech Connect (OSTI)

    Wei-Ping Pan, Kunlei Liu; John T. Riley

    2004-07-30

    This report presents the progress made on the project ''Establishment of an Environmental Control Technology Laboratory (ECTL) with a Circulating Fluidized-Bed Combustion (CFBC) System'' during the quarter April 1--June 30, 2004. The following tasks have been completed. First, the final specifications for the renovation of the new Combustion Laboratory and the construction of the CFB Combustor Building have been delivered to the architect, and invitations for construction bids for the two tasks have been released. Second, the component parts of the CFBC system have been designed after the design work for assembly parts of the CFBC system was completed. Third, the literature pertaining to Polychlorinated Dibenzo-p-Dioxins (PCDD) and Polychlorinated Dibenzofurans (PCDF) released during the incineration of solid waste, including municipal solid waste (MSW) and refuse-derived fuel (RDF) have been reviewed, and an experimental plan for fundamental research of MSW incineration on a simulated fluidized-bed combustion (FBC) facility has been prepared. Finally, the proposed work for the next quarter has been outlined in this report.

  15. Congressional Research Service, Research

    E-Print Network [OSTI]

    Fernández-Juricic, Esteban

    , confidential memos, expert testimony at Congressional hearings, and responses to inquiries about major policyCongressional Research Service, Research Associate Graduate Intern Behind the Capitol Building, the face of the Legislative Branch, lies the Congressional Research Service (CRS) which provides support

  16. Assimilation of sea surface salinity in a tropical Oceanic General Circulation Model (OGCM): A twin experiment approach

    E-Print Network [OSTI]

    as they are actually a strong limitation in assimilation performance when assimilating any real data set. INDEX TERMS Caledonia, France Jacques Verron Laboratoire des Ecoulements Ge´ophysiques et Industriels, Centre National must be taken into proper account in conjunction with temperature and altimetric data. The sensitivity

  17. The general circulation of the Gulf of Aqaba (Gulf of Eilat) revisited: The interplay between the exchange flow

    E-Print Network [OSTI]

    Gildor, Hezi

    an ecological system that includes coral reefs and other tropical biota that are unique in such high latitudes importance and the severe anthropogenic stresses that endanger the gulf and may alter it permanently

  18. Carbon-nitrogen interactions regulate climate-carbon cycle feedbacks: results from an atmosphere-ocean general circulation model

    E-Print Network [OSTI]

    2009-01-01

    2009 P. E. Thornton et al. : Carbon-nitrogen interactionsregulate climate-carbon cycle feedbacks Monfray, P. ,T. H. : A global ocean carbon climatology: Results from

  19. Polarized 3He Gas Circulating Technologies for Neutron Analyzers

    SciTech Connect (OSTI)

    Watt, David; Hersman, Bill

    2014-12-10

    We describe the development of an integrated system for quasi-continuous operation of a large volume neutron analyzer. The system consists of a non-magnetic diaphragm compressor, a prototype large volume helium polarizer, a surrogate neutron analyzer, a non-depolarizing gas storage reservoir, a non-ferrous valve manifold for handling gas distribution, a custom rubidium-vapor gas return purifier, and wire-wound transfer lines, all of which are immersed in a two-meter external magnetic field. Over the Phase II period we focused on three major tasks required for the successful deployment of these types of systems: 1) design and implementation of gas handling hardware, 2) automation for long-term operation, and 3) improvements in polarizer performance, specifically fabrication of aluminosilicate optical pumping cells. In this report we describe the design, implementation, and testing of the gas handling hardware. We describe improved polarizer performance resulting from improved cell materials and fabrication methods. These improvements yielded valved 8.5 liter cells with relaxation times greater than 12 hours. Pumping this cell with 1500W laser power with 1.25nm linewidth yielded peak polarizations of 60%, measured both inside and outside the polarizer. Fully narrowing this laser to 0.25nm, demonstrated separately on one stack of the four, would have allowed 70% polarization with this cell. We demonstrated the removal of 5 liters of polarized helium from the polarizer with no measured loss of polarization. We circulated the gas through a titanium-clad compressor with polarization loss below 3% per pass. We also prepared for the next phase of development by refining the design of the polarizer so that it can be engineer-certified for pressurized operation. The performance of our system far exceeds comparable efforts elsewhere.

  20. The Full Water Disposal Ways and Study on Central Air-conditioning Circulation Cooling Water System 

    E-Print Network [OSTI]

    Zhang, J.

    2006-01-01

    This paper has been made the further study about the water quality issue of the central air-conditioning circulation cooling water. Based on the comparison of the existing common adopted disposal ways, put forward the new ways of combination...

  1. The role of the geothermal heat flux in driving the abyssal ocean circulation

    E-Print Network [OSTI]

    Mashayek, A.

    The results presented in this paper demonstrate that the geothermal heat flux (GHF) from the solid Earth into the ocean plays a non-negligible role in determining both abyssal stratification and circulation strength. Based ...

  2. Slip stream apparatus and method for treating water in a circulating water system

    DOE Patents [OSTI]

    Cleveland, J.R.

    1997-03-18

    An apparatus is described for treating water in a circulating water system that has a cooling water basin which includes a slip stream conduit in flow communication with the circulating water system, a source of acid solution in flow communication with the slip stream conduit, and a decarbonator in flow communication with the slip stream conduit and the cooling water basin. In use, a slip stream of circulating water is drawn from the circulating water system into the slip stream conduit of the apparatus. The slip stream pH is lowered by contact with an acid solution provided from the source thereof. The slip stream is then passed through a decarbonator to form a treated slip stream, and the treated slip stream is returned to the cooling water basin. 4 figs.

  3. Sensitivity of the Ocean's Meridional Overturning Circulation to Surface Conditions in the Paleogene 

    E-Print Network [OSTI]

    Haines, Brian Andrew

    2012-10-19

    Deep circulations in the ocean affect the distribution of physical, chemical, and biological properties, and are intimately entwined with the planetary-scale climate. Numerous proxies, including neodymium (Nd) in fossil fish teeth, point to a source...

  4. Atlantic Ocean circulation at the last glacial maximum : inferences from data and models

    E-Print Network [OSTI]

    Dail, Holly Janine

    2012-01-01

    This thesis focuses on ocean circulation and atmospheric forcing in the Atlantic Ocean at the Last Glacial Maximum (LGM, 18-21 thousand years before present). Relative to the pre-industrial climate, LGM atmospheric CO? ...

  5. Dis/locating audience : transnational media flows and the online circulation of East Asian television drama

    E-Print Network [OSTI]

    Li, Xiaochang, S.M. Massachusetts Institute of Technology

    2009-01-01

    It is commonly accepted that media and communication technologies play pivotal roles in the complex processes of what is broadly termed "globalization." The increasing speed, volume, and scale of transnational circulation ...

  6. Relative Roles of Climate Sensitivity and Forcing in Defining the Ocean Circulation Response to Climate Change

    E-Print Network [OSTI]

    Scott, Jeffery R.

    The response of the ocean’s meridional overturning circulation (MOC) to increased greenhouse gas forcing is examined using a coupled model of intermediate complexity, including a dynamic 3D ocean subcomponent. Parameters ...

  7. Elevated circulating branched chain amino acids are an early event in pancreatic adenocarcinoma development

    E-Print Network [OSTI]

    Mayers, Jared R.

    Most patients with pancreatic ductal adenocarcinoma (PDAC) are diagnosed with advanced disease and survive less than 12 months. PDAC has been linked with obesity and glucose intolerance, but whether changes in circulating ...

  8. Impact of the Atlantic meridional overturning circulation on ocean heat storage and transient climate change

    E-Print Network [OSTI]

    Armour, Kyle C.

    We propose here that the Atlantic meridional overturning circulation (AMOC) plays an important role in setting the effective heat capacity of the World Ocean and thus impacts the pace of transient climate change. The depth ...

  9. Stability analysis of natural circulation in BWRs at high pressure conditions

    E-Print Network [OSTI]

    Hu, Rui, Ph. D. Massachusetts Institute of Technology

    2007-01-01

    At rated conditions, a natural circulation boiling water reactor (NCBWR) depends completely on buoyancy to remove heat from the reactor core. This raises the issue of potential unstable flow. oscillations. The objective ...

  10. Impact of cloud radiative heating on East Asian summer monsoon circulation

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

    Guo, Zhun; Zhou, Tianjun; Wang, Minghuai; Qian, Yun

    2015-07-17

    The impacts of cloud radiative heating on East Asian Summer Monsoon (EASM) over the southeastern China (105°-125°E, 20°-35°N) are explained by using the Community Atmosphere Model version 5 (CAM5). Sensitivity experiments demonstrate that the radiative heating of clouds leads to a positive effect on the local EASM circulation over southeastern China. Without the radiative heating of cloud, the EASM circulation and precipitation would be much weaker than that in the normal condition. The longwave heating of clouds dominates the changes of EASM circulation. The positive effect of clouds on EASM circulation is explained by the thermodynamic energy equation, i.e. themore »different heating rate between cloud base and cloud top enhances the convective instability over southeastern China, which enhances updraft consequently. The strong updraft would further result in a southward meridional wind above the center of the updraft through Sverdrup vorticity balance.« less

  11. Porous compaction in transient creep regime and implications for melt, petroleum, and CO2 circulation

    E-Print Network [OSTI]

    Kaminski, Edouard

    Porous compaction in transient creep regime and implications for melt, petroleum, and CO2 in transient creep regime and implications for melt, petroleum, and CO2 circulation, J. Geophys. Res., 113, B

  12. Evolution of Atlantic deep-water circulation: from the greenhouse to the icehouse 

    E-Print Network [OSTI]

    Via, Rachael Kathleen

    2005-11-01

    To better understand how the evolution of Cenozoic deep-water circulation related to changes in global climate and ocean basin configuration, we generated Nd isotope records from Ocean Drilling Program sites in the southeastern Atlantic to track...

  13. Slip stream apparatus and method for treating water in a circulating water system

    DOE Patents [OSTI]

    Cleveland, Joe R. (West Hills, CA)

    1997-01-01

    An apparatus (10) for treating water in a circulating water system (12) t has a cooling water basin (14) includes a slip stream conduit (16) in flow communication with the circulating water system (12), a source (36) of acid solution in flow communication with the slip stream conduit (16), and a decarbonator (58) in flow communication with the slip stream conduit (16) and the cooling water basin (14). In use, a slip stream of circulating water is drawn from the circulating water system (12) into the slip stream conduit (16) of the apparatus (10). The slip stream pH is lowered by contact with an acid solution provided from the source (36) thereof. The slip stream is then passed through a decarbonator (58) to form a treated slip stream, and the treated slip stream is returned to the cooling water basin (14).

  14. Evaluation of equipment and methods to map lost circulation zones in geothermal wells

    SciTech Connect (OSTI)

    McDonald, W.J.; Leon, P.A.; Pittard, G.

    1981-05-01

    A study and evaluation of methods to locate, characterize, and quantify lost circulation zones are described. Twenty-five methods of mapping and quantifying lost circulation zones were evaluated, including electrical, acoustical, mechanical, radioactive, and optical systems. Each tool studied is described. The structured, numerical evaluation plan, used as the basis for comparing the 25 tools, and the resulting ranking among the tools is presented.

  15. THREE-DIMENSIONAL ATMOSPHERIC CIRCULATION OF HOT JUPITERS ON HIGHLY ECCENTRIC ORBITS

    SciTech Connect (OSTI)

    Kataria, T.; Showman, A. P.; Lewis, N. K. [Department of Planetary Sciences and Lunar and Planetary Laboratory, The University of Arizona, Tucson, AZ 85721 (United States)] [Department of Planetary Sciences and Lunar and Planetary Laboratory, The University of Arizona, Tucson, AZ 85721 (United States); Fortney, J. J. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States)] [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Marley, M. S.; Freedman, R. S., E-mail: tkataria@lpl.arizona.edu [NASA Ames Research Center 245-3, Moffett Field, CA 94035 (United States)

    2013-04-10

    Of the over 800 exoplanets detected to date, over half are on non-circular orbits, with eccentricities as high as 0.93. Such orbits lead to time-variable stellar heating, which has major implications for the planet's atmospheric dynamical regime. However, little is known about the fundamental dynamical regime of such planetary atmospheres, and how it may influence the observations of these planets. Therefore, we present a systematic study of hot Jupiters on highly eccentric orbits using the SPARC/MITgcm, a model which couples a three-dimensional general circulation model (the MITgcm) with a plane-parallel, two-stream, non-gray radiative transfer model. In our study, we vary the eccentricity and orbit-average stellar flux over a wide range. We demonstrate that the eccentric hot Jupiter regime is qualitatively similar to that of planets on circular orbits; the planets possess a superrotating equatorial jet and exhibit large day-night temperature variations. As in Showman and Polvani, we show that the day-night heating variations induce momentum fluxes equatorward to maintain the superrotating jet throughout its orbit. We find that as the eccentricity and/or stellar flux is increased (corresponding to shorter orbital periods), the superrotating jet strengthens and narrows, due to a smaller Rossby deformation radius. For a select number of model integrations, we generate full-orbit light curves and find that the timing of transit and secondary eclipse viewed from Earth with respect to periapse and apoapse can greatly affect what we see in infrared (IR) light curves; the peak in IR flux can lead or lag secondary eclipse depending on the geometry. For those planets that have large temperature differences from dayside to nightside and rapid rotation rates, we find that the light curves can exhibit 'ringing' as the planet's hottest region rotates in and out of view from Earth. These results can be used to explain future observations of eccentric transiting exoplanets.

  16. Improving Control System Security through the Evaluation of Current Trends in Computer Security Research

    SciTech Connect (OSTI)

    Rolston

    2005-03-01

    At present, control system security efforts are primarily technical and reactive in nature. What has been overlooked is the need for proactive efforts, focused on the IT security research community from which new threats might emerge. Evaluating cutting edge IT security research and how it is evolving can provide defenders with valuable information regarding what new threats and tools they can anticipate in the future. Only known attack methodologies can be blocked, and there is a gap between what is known to the general security community and what is being done by cutting edge researchers --both those trying to protect systems and those trying to compromise them. The best security researchers communicate with others in their field; they know what cutting edge research is being done; what software can be penetrated via this research; and what new attack techniques and methodologies are being circulated in the black hat community. Standardization of control system applications, operating systems, and networking protocols is occurring at a rapid rate, following a path similar to the standardization of modern IT networks. Many attack methodologies used on IT systems can be ported over to the control system environment with little difficulty. It is extremely important to take advantage of the lag time between new research, its use on traditional IT networks, and the time it takes to port the research over for use on a control system network. Analyzing nascent trends in IT security and determining their applicability to control system networks provides significant information regarding defense mechanisms needed to secure critical infrastructure more effectively. This work provides the critical infrastructure community with a better understanding of how new attacks might be launched, what layers of defense will be needed to deter them, how the attacks could be detected, and how their impact could be limited.

  17. Thermohaline circulations and global climate change. Final report

    SciTech Connect (OSTI)

    Hanson, H.P.

    1994-09-01

    This research is ultimately concerned with investigating the hypothesis that changes in surface thermal and hydrological forcing of the North Atlantic, changes that might be expected to accompany CO2-induced global warming, could result in ocean-atmosphere interactions` exerting a positive feedback on the climate system. This report concerns research conducted with funding from the Carbon Dioxide Research Program (now the Global Climate Change Program) of the US Department of Energy via grant no. DE-FG02-90ER61019 during the period 15 July 1990 - 14 July 1994. This was a three-year award, extended to a fourth year (15 July 1993 - 14 July 1994) via a no-cost extension. It is important to emphasize that this award has been renewed for an additional two years (15 July 1993 - 14 July 1995) via grant no. DE-FG03-93ER61646 (with the same title). Because the project was originally envisioned to be a five-year effort, many of the important results and conclusions will be available for the Final Report of that second award. This report therefore concerns mainly preliminary conclusions and a discussion of progress toward understanding the central hypothesis of the research.

  18. General Service LED Lamps

    Broader source: Energy.gov [DOE]

    A U.S. DOE SSL technology fact sheet that compares general service LED light bulbs with incandescent and CFL bulbs.

  19. Generalizations of quantum statistics

    E-Print Network [OSTI]

    O. W. Greenberg

    2008-05-02

    We review generalizations of quantum statistics, including parabose, parafermi, and quon statistics, but not including anyon statistics, which is special to two dimensions.

  20. Dynamics of Arctic and Sub-Arctic Climate and Atmospheric Circulation: Diagnosis of Mechanisms and Biases Using Data Assimilation

    SciTech Connect (OSTI)

    Eric T. DeWeaver

    2010-01-19

    This is the final report for DOE grant DE-FG02-07ER64434 to Eric DeWeaver at the University of Wisconsin-Madison. The overall goal of work performed under this grant is to enhance understanding of simulations of present-day climate and greenhouse gas-induced climate change. Enhanced understanding is desirable 1) as a prerequisite for improving simulations; 2) for assessing the credibility of model simulations and their usefulness as tools for decision support; and 3) as a means to identify robust behaviors which commonly occur over a wide range of models, and may yield insights regarding the dominant physical mechanisms which determine mean climate and produce climate change. A furthe objective is to investigate the use of data assimilation as a means for examining and correcting model biases. Our primary focus is on the Arctic, but the scope of the work was expanded to include the global climate system to the extent that research targets of opportunity present themselves. Research performed under the grant falls into five main research areas: 1) a study of data assimilation using an ensemble filter with the atmospheric circulation model of the National Center for Atmospheric Research, in which both conventional observations and observations of the refraction of radio waves from GPS satellites were used to constrain the atmospheric state of the model; 2) research on the likely future status of polar bears, in which climate model simluations were used to assess the effectiveness of climate change mitigation efforts in preserving the habitat of polar bears, now considered a threatened species under global warming; 3) as assessment of the credibility of Arctic sea ice thickness simulations from climate models; 4) An examination of the persistence and reemergence of Northern Hemisphere sea ice area anomalies in climate model simulations and in observations; 5) An examination of the roles played by changes in net radiation and surface relative humidity in determine the response of the hydrological cycle to global warming.

  1. Research Area Research Instruction

    E-Print Network [OSTI]

    Kaji, Hajime

    -machinery system (centrifugal and axial flow fans and compressors), research on aeroacoustics and unsteady data of Engineering (Univ. of Tokyo.) TEZUKA Asei Machine engine (numerical modelings on turbulence, combustion and compressor) by numerical simulation and experiment concerning internal flow, flow induced vibration

  2. Model-free adaptive control of supercritical circulating fluidized-bed boilers

    DOE Patents [OSTI]

    Cheng, George Shu-Xing; Mulkey, Steven L

    2014-12-16

    A novel 3-Input-3-Output (3.times.3) Fuel-Air Ratio Model-Free Adaptive (MFA) controller is introduced, which can effectively control key process variables including Bed Temperature, Excess O2, and Furnace Negative Pressure of combustion processes of advanced boilers. A novel 7-input-7-output (7.times.7) MFA control system is also described for controlling a combined 3-Input-3-Output (3.times.3) process of Boiler-Turbine-Generator (BTG) units and a 5.times.5 CFB combustion process of advanced boilers. Those boilers include Circulating Fluidized-Bed (CFB) Boilers and Once-Through Supercritical Circulating Fluidized-Bed (OTSC CFB) Boilers.

  3. Embeddings for General Relativity

    E-Print Network [OSTI]

    J. Ponce de Leon

    2015-09-01

    We present a systematic approach to embed $n$-dimensional vacuum general relativity in an $(n + 1)$-dimensional pseudo-Riemannian spacetime whose source is either a (non)zero cosmological constant or a scalar field minimally-coupled to Einstein gravity. Our approach allows us to generalize a number of results discussed in the literature. We construct {\\it all} the possible (physically distinct) embeddings in Einstein spaces, including the Ricci-flat ones widely discussed in the literature. We examine in detail their generalization, which - in the framework under consideration - are higher-dimensional spacetimes sourced by a scalar field with flat (constant $\

  4. General relativity and experiment

    E-Print Network [OSTI]

    T. Damour

    1994-12-08

    The confrontation between Einstein's theory of gravitation and experiment is summarized. Although all current experimental data are compatible with general relativity, the importance of pursuing the quest for possible deviations from Einstein's theory is emphasized.

  5. Symmetric generalized binomial distributions

    SciTech Connect (OSTI)

    Bergeron, H.; Curado, E. M. F.; Instituto Nacional de Ciência e Tecnologia - Sistemas Complexos, Rua Xavier Sigaud 150, 22290-180 - Rio de Janeiro, RJ ; Gazeau, J. P.; APC, UMR 7164, Univ Paris Diderot, Sorbonne Paris Cité, 75205 Paris ; Rodrigues, Ligia M. C. S. E-mail: evaldo@cbpf.br E-mail: ligia@cbpf.br

    2013-12-15

    In two recent articles, we have examined a generalization of the binomial distribution associated with a sequence of positive numbers, involving asymmetric expressions of probabilities that break the symmetry win-loss. We present in this article another generalization (always associated with a sequence of positive numbers) that preserves the symmetry win-loss. This approach is also based on generating functions and presents constraints of non-negativeness, similar to those encountered in our previous articles.

  6. Generalizing Optical Geometry

    E-Print Network [OSTI]

    Rickard Jonsson; Hans Westman

    2007-08-21

    We show that by employing the standard projected curvature as a measure of spatial curvature, we can make a certain generalization of optical geometry (Abramowicz and Lasota 1997, Class. Quantum Grav. 14 (1997) A23). This generalization applies to any spacetime that admits a hypersurface orthogonal shearfree congruence of worldlines. This is a somewhat larger class of spacetimes than the conformally static spacetimes assumed in standard optical geometry. In the generalized optical geometry, which in the generic case is time dependent, photons move with unit speed along spatial geodesics and the sideways force experienced by a particle following a spatially straight line is independent of the velocity. Also gyroscopes moving along spatial geodesics do not precess (relative to the forward direction). Gyroscopes that follow a curved spatial trajectory precess according to a very simple law of three-rotation. We also present an inertial force formalism in coordinate representation for this generalization. Furthermore, we show that by employing a new sense of spatial curvature (Jonsson, Class. Quantum Grav. 23 (2006) 1) closely connected to Fermat's principle, we can make a more extensive generalization of optical geometry that applies to arbitrary spacetimes. In general this optical geometry will be time dependent, but still geodesic photons move with unit speed and follow lines that are spatially straight in the new sense. Also, the sideways experienced (comoving) force on a test particle following a line that is straight in the new sense will be independent of the velocity.

  7. Mesoscale Systems: weather associated with circulation systems of horizontal scales of 5 to 1,000 km

    E-Print Network [OSTI]

    Weber, Rodney

    . Urban heat island induced circulations (city-country side circulation) 4. Mountain-valley winds in winter #12;Urban Heat Island Urban heat island intensity: DTu-r = Turban - Trural Max DTu-r usually at night Intensity of urban heat island depends on many factors · Size of city · Geographical location

  8. Multi-Carrier Multiple Access is Sum-Rate Optimal for Block Transmissions over Circulant ISI Channels*

    E-Print Network [OSTI]

    Giannakis, Georgios

    Multi-Carrier Multiple Access is Sum-Rate Optimal for Block Transmissions over Circulant ISI to maximizing the sum-rate of circulant inter-symbol interference (ISI) channels, that are assumed available at the transmitter. Cir- culant ISI channels are ensured either with cyclic pre`xed block transmissions

  9. Numerical Simulations of the Island-Induced Circulations over the Island of Hawaii during HaRP

    E-Print Network [OSTI]

    Chen, Yi-Leng

    Numerical Simulations of the Island-Induced Circulations over the Island of Hawaii during HaRP YANG YANG AND YI-LENG CHEN Department of Meteorology, SOEST, University of Hawaii at Manoa, Honolulu, Hawaii island-scale circulations over the island of Hawaii during the Hawaiian Rainband Project (HaRP, 11 July

  10. Central South Pacific thermocline water circulation from a high-resolution ocean model validated against satellite data

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Central South Pacific thermocline water circulation from a high-resolution ocean model validated. Introduction [2] Most South Pacific Ocean studies have been focused on its western or eastern part, leaving 12 January 2009; accepted 28 January 2009; published 13 May 2009. [1] The oceanic circulation

  11. Relative effects of wind stress curl, topography, and stratification on large-scale circulation in Lake Michigan

    E-Print Network [OSTI]

    Relative effects of wind stress curl, topography, and stratification on large-scale circulation, and stratification on large-scale circulation. The multiseason simulations provide a period long enough to encompass the full range of atmospheric and thermal conditions that can occur in the lake. The purpose of this paper

  12. Phase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating Current

    E-Print Network [OSTI]

    Phase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating@aei.com Abstract - This paper introduces a full bridge converter with reduced circulating current and a reduction bridge converter operating at 32 kHz switching frequency. Losses and efficiency of the experimental

  13. Impact of the Intraseasonal Variability of the Western North Pacific Large-Scale Circulation on Tropical Cyclone Tracks

    E-Print Network [OSTI]

    Chen, Tsing-Chang "Mike"

    Pacific rim, as portrayed by the Pacific-Japan Oscillation. During the extreme phases of the monsoon lifeImpact of the Intraseasonal Variability of the Western North Pacific Large-Scale Circulation@iastate.edu #12;1 Abstract The life cycle of the Southeast Asia-western North Pacific monsoon circulation

  14. Effects of tropical cyclones on large-scale circulation and ocean heat transport in the South China Sea

    E-Print Network [OSTI]

    suggests that effects of TC can penetrate deeper into the ocean. This deep effect may result from the nearEffects of tropical cyclones on large-scale circulation and ocean heat transport in the South China the influence of tropical cyclones (TCs) on large-scale circulation and ocean heat transport in the South China

  15. 2 Ocean circulation at the Last Glacial Maximum: 3 A combined modeling and magnetic proxy-based study

    E-Print Network [OSTI]

    40 greater influence and penetration of deep water formed in 41 the Southern Ocean [e.g., Oppo2 Ocean circulation at the Last Glacial Maximum: 3 A combined modeling and magnetic proxy (NADW) is an important component of the ocean thermohaline 7 circulation, but debate exists over

  16. A Large Ozone-Circulation Feedback & Its Implications for Global Warming Assessments

    E-Print Network [OSTI]

    Jackson, Sophie

    Peer A Large Ozone-Circulation Feedback & Its Implications for Global Warming Assessments PeerCO2, b T by 4xCO2, c T by O3 and d water vapour by O3. 4. GLOBAL WARMING RESPONSE 0 50 100 150 200 250) Figure 1 | Temporal evolution of the annual and global mean surface tem- perature anomalies. Interactive

  17. Muted change in Atlantic overturning circulation over some glacial-aged Heinrich events

    E-Print Network [OSTI]

    Lynch-Stieglitz, Jean

    Muted change in Atlantic overturning circulation over some glacial-aged Heinrich events Jean Lynch--punctuated the last glacial period. The events are associated with millennial-scale cooling in the Northern Hemisphere. Fresh water from the melting icebergs is thought to have interrupted the Atlantic meridional overturning

  18. Circulation induced by subglacial discharge in glacial fjords: Results from idealized numerical simulations

    E-Print Network [OSTI]

    deYoung, Brad

    , 1980). In some subpolar glacial fjords, however, the glacial ice melting can be masked by the muchCirculation induced by subglacial discharge in glacial fjords: Results from idealized numerical). The connection between ice and ocean boundaries in Arctic environments can be through glacial fjords

  19. Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole

    E-Print Network [OSTI]

    Deep Meridional Overturning Circulation in the Indian Ocean and Its Relation to Indian Ocean Dipole of the Ocean (GECCO) syn- thesis data to analyze and examine the relationship of the Indian Ocean deep within the zonal band of 108 on both sides of the equator. Therefore, there exists a surface to deep

  20. Market Basket Analysis of Library Circulation Data Sally Jo Cunningham, Eibe Frank

    E-Print Network [OSTI]

    Frank, Eibe

    Market Basket Analysis of Library Circulation Data Sally Jo Cunningham, Eibe Frank Department market basket analysis tool to the task of detecting subject classification categories that co-occur in transaction records of books borrowed from a university library. This information can be useful in directing

  1. Market Basket Analysis of Library Circulation Data Sally Jo Cunningham, Eibe Frank

    E-Print Network [OSTI]

    Frank, Eibe

    Market Basket Analysis of Library Circulation Data Sally Jo Cunningham, Eibe Frank Department market basket analysis tool to the task of detecting subject classification categories that co­occur in transaction records of books borrowed from a university library. This information can be useful in directing

  2. Instruments and Methods Surface circulation in the Nordic Seas from clustered drifters

    E-Print Network [OSTI]

    LaCasce, Joseph H.

    Instruments and Methods Surface circulation in the Nordic Seas from clustered drifters I. Koszalka Accepted 18 January 2011 Available online 31 January 2011 Keywords: Surface drifters Lagrangian methods estimates where the data is sparse. Clustering the available surface drifter data, extended by recent

  3. Global surface cooling: the atmospheric fast feedback response to a collapse of the thermohaline circulation

    E-Print Network [OSTI]

    Drijfhout, Sybren

    Global surface cooling: the atmospheric fast feedback response to a collapse of the thermohaline thermohaline circulation results in a global surface cooling of 0.72 K. The mechanisms that are responsible for this cooling are investigated. Additional experiments were performed with a one-dimensional radiative

  4. Monsoons as eddy-mediated regime transitions of the tropical overturning circulation

    E-Print Network [OSTI]

    Bordoni, Simona

    monsoons are prominent features of the summertime circulation of Earth's atmo- 1 #12;sphere, the mechanisms their largest values (Fig. 2b, f). Consistent with the Coriolis force on the meridional near-surface flow approximately balancing the drag on the zonal near- surface wind, the zonal near-surface wind in the northern

  5. The influence of the transition zone water filter on convective circulation in the mantle

    E-Print Network [OSTI]

    The influence of the transition zone water filter on convective circulation in the mantle Garrett M 2004. [1] The ``transition zone water filter'' model of mantle convection attempts to reconcile bulk mass and heat transfer across mantle interfaces. Here we test the basic effect of the water filter

  6. A Climatology of Tropical Anvil and Its Relationship to the Large-Scale Circulation 

    E-Print Network [OSTI]

    Li, Wei

    2011-02-22

    of anvil formation, and to provide a more realistic assessment of the radiative impact of tropical anvil on the large-scale circulation. Based on 10 years (1998-2007) of observations, anvil observed by the Tropical Rainfall Measuring Mission (TRMM...

  7. The impact of natural versus anthropogenic aerosols on atmospheric circulation in the Community

    E-Print Network [OSTI]

    Sherwood, Steven

    The impact of natural versus anthropogenic aerosols on atmospheric circulation in the Community strengthen wintertime zonal wind near 60°N, weaken it near 30°N, warm the tropo- sphere, cool and absorb solar radiation, and therefore contribute to atmospheric solar heating and surface cooling (Ramana

  8. Sources of Variability in Gulf of Maine Circulation, and the Observations Needed to

    E-Print Network [OSTI]

    Pringle, James "Jamie"

    Sources of Variability in Gulf of Maine Circulation, and the Observations Needed to Model it. James in the Gulf of Maine are then quantified, with an emphasis on variability on timescales longer than tidal and the volume of water entering from the Scotian Shelf to the Gulf of Maine produce roughly comparable amounts

  9. Seasonal Mean Circulation in the Yellow Sea A ModelGenerated Climatology

    E-Print Network [OSTI]

    . Data in­ puts include seasonal hydrography, seasonal mean wind and river input, and oceanic tides pattern. The Changjiang discharge is driven offshore toward the Korean Strait by the summer wind. Results for winter and summer exhibit two distinct circulation modes. In winter, strong northerly wind

  10. Frontal circulation induced by up-front and coastal downwelling winds

    E-Print Network [OSTI]

    consequences to vertical exchanges of tracers and water masses. Keywords Ocean fronts . Wind-front interactionFrontal circulation induced by up-front and coastal downwelling winds Yu-Lin Chang & Lie-Yauw Oey-shelf and depth) circula- tion by downwelling wind in the presence of a prograding front (with isopycnals

  11. Vertical circulation and thermospheric composition: a modelling study H. Rishbeth1

    E-Print Network [OSTI]

    Mueller-Wodarg, Ingo

    -layer. At equinox, the vertical air motion is basically up by day, down by night, and the atomic oxygen is greater in winter than in summer, the semiannual anomaly exists if NmF2 is greater at equinox than by global-scale vertical and horizontal winds associated with a worldwide thermospheric circulation

  12. Numerical Simulation of Mesoscale Circulations in a Region of Contrasting Soil Types

    E-Print Network [OSTI]

    Raman, Sethu

    Numerical Simulation of Mesoscale Circulations in a Region of Contrasting Soil Types SETHU RAMAN,1 AARON SIMS,1,2 ROBB ELLIS,1 and RYAN BOYLES 1 Abstract--Mesoscale processes that form due to changes on mesoscale processes are examined. Climatological analyses indicate increased convective precipitation

  13. Effect of the Atlantic hurricanes on the oceanic meridional overturning circulation and heat transport

    E-Print Network [OSTI]

    Hu, Aixue

    Effect of the Atlantic hurricanes on the oceanic meridional overturning circulation and heat February 2009. [1] Hurricanes have traditionally been perceived as intense but relatively small scale that hurricanes could play a much more significant role in global climate. Here we prescribe Atlantic hurricanes

  14. NearCoM-TVD --A quasi-3D nearshore circulation and sediment transport model

    E-Print Network [OSTI]

    Kirby, James T.

    NearCoM-TVD -- A quasi-3D nearshore circulation and sediment transport model Jia-Lin Chen , Fengyan: Nearshore community model TVD-scheme Sediment transport Sandbar migration The newly developed nearshore). For sediment transport applications, two sediment transport models are applied to pre- dict three sandbar

  15. Modeling circulation and thermal structure in Lake Michigan: Annual cycle and interannual variability

    E-Print Network [OSTI]

    structure in Lake Michigan: spring thermal bar, full stratification, deepening of the thermocline duringModeling circulation and thermal structure in Lake Michigan: Annual cycle and interannual and thermal structure in the lake. The model was able to reproduce all of the basic features of the thermal

  16. Jet-like circulations occur in the `simple' geometries of gas planets and Earth's

    E-Print Network [OSTI]

    #12;Jet-like circulations occur in the `simple' geometries of gas planets and Earth's liquid to barotropize jets => life cycles of BC instability. large-scale PV gradients act as source of eddy entrophy The Jet Stream Conundrum Baldwin, Rhines, Huang & McIntyre, Nature 2007 #12;For Earth's oceans, density

  17. A new model to simulate the Martian mesoscale and microscale atmospheric circulation: Validation and first results

    E-Print Network [OSTI]

    Spiga, Aymeric

    A new model to simulate the Martian mesoscale and microscale atmospheric circulation: Validation) Mesoscale Model is a new versatile simulator of the Martian atmosphere and environment at horizontal scales, and photochemistry cycles. Since LMD-GCM large-scale simulations are also used to drive the mesoscale model

  18. Performance evaluation approach for the supercritical helium cold circulators of ITER

    SciTech Connect (OSTI)

    Vaghela, H.; Sarkar, B.; Bhattacharya, R.; Kapoor, H. [ITER-India, Institute for Plasma Research, Near Indira Bridge, Bhat, Gandhinagar-382428 (India); Chalifour, M.; Chang, H.-S.; Serio, L. [ITER Organization, Route de Vinon sur Verdon - 13115 St Paul Lez Durance (France)

    2014-01-29

    The ITER project design foresees Supercritical Helium (SHe) forced flow cooling for the main cryogenic components, namely, the superconducting (SC) magnets and cryopumps (CP). Therefore, cold circulators have been selected to provide the required SHe mass flow rate to cope with specific operating conditions and technical requirements. Considering the availability impacts of such machines, it has been decided to perform evaluation tests of the cold circulators at operating conditions prior to the series production in order to minimize the project technical risks. A proposal has been conceptualized, evaluated and simulated to perform representative tests of the full scale SHe cold circulators. The objectives of the performance tests include the validation of normal operating condition, transient and off-design operating modes as well as the efficiency measurement. A suitable process and instrumentation diagram of the test valve box (TVB) has been developed to implement the tests at the required thermodynamic conditions. The conceptual engineering design of the TVB has been developed along with the required thermal analysis for the normal operating conditions to support the performance evaluation of the SHe cold circulator.

  19. Circulation . Author manuscript Activation of lung p53 by Nutlin-3a prevents and reverses experimental

    E-Print Network [OSTI]

    Boyer, Edmond

    Circulation . Author manuscript Page /1 14 Activation of lung p53 by Nutlin-3a prevents PA-SMCs; lung p53, p21, and MDM2 protein levels; and p21, Bax, PUMA, BTG2, and MDM2 mRNA levels or reversal by Nutlin-3a required lung p53 stabilization and increased p21 expression, as indicated

  20. First Tracer Test After Circulation in Desert Peak 27-15

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

    Rose, Peter

    2013-11-16

    Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

  1. A numerical study of circulation and mixing in a macrotidal estuary: Cobscook Bay, Maine 

    E-Print Network [OSTI]

    Baca, Michael William

    1998-01-01

    A numerical, three-dimensional coastal ocean model was ics. used to study the circulation and subsequent mixing of Cobscook Bay by the lunar semi-diurnal tide. The results showed strong ebbing and flooding currents along a main channel connected...

  2. Mobilization of Viable Tumor Cells Into the Circulation During Radiation Therapy

    SciTech Connect (OSTI)

    Martin, Olga A.; Anderson, Robin L.; Russell, Prudence A.; Ashley Cox, R.; Ivashkevich, Alesia; Swierczak, Agnieszka; Doherty, Judy P.; Jacobs, Daphne H.M.; Smith, Jai; Siva, Shankar; Daly, Patricia E.; Ball, David L.; and others

    2014-02-01

    Purpose: To determine whether radiation therapy (RT) could mobilize viable tumor cells into the circulation of non-small cell lung cancer (NSCLC) patients. Methods and Materials: We enumerated circulating tumor cells (CTCs) by fluorescence microscopy of blood samples immunostained with conventional CTC markers. We measured their DNA damage levels using ?-H2AX, a biomarker for radiation-induced DNA double-strand breaks, either by fluorescence-activated cell sorting or by immunofluorescence microscopy. Results: Twenty-seven RT-treated NSCLC patients had blood samples analyzed by 1 or more methods. We identified increased CTC numbers after commencement of RT in 7 of 9 patients treated with palliative RT, and in 4 of 8 patients treated with curative-intent RT. Circulating tumor cells were also identified, singly and in clumps in large numbers, during RT by cytopathologic examination (in all 5 cases studied). Elevated ?-H2AX signal in post-RT blood samples signified the presence of CTCs derived from irradiated tumors. Blood taken after the commencement of RT contained tumor cells that proliferated extensively in vitro (in all 6 cases studied). Circulating tumor cells formed ?-H2AX foci in response to ex vivo irradiation, providing further evidence of their viability. Conclusions: Our findings provide a rationale for the development of strategies to reduce the concentration of viable CTCs by modulating RT fractionation or by coadministering systemic therapies.

  3. A decrease of circulating CD4? T cells in Attwater's prairie chickens infected with reticuloendotheliosis virus 

    E-Print Network [OSTI]

    Ferro, Pamela Joyce Bloomer

    2001-01-01

    of this project was to develop a method to monitor CD4? and CD8? T cells in prairie chickens and to determine if there was an alteration in the number of circulating T cells associated with REV infection in prairie chickens. A panel of anti-chicken monoclonal...

  4. On the role of topography and wind stress on the stability of the thermohaline circulation

    E-Print Network [OSTI]

    Edwards, Neil

    On the role of topography and wind stress on the stability of the thermohaline circulation Neil R variations and the presence or absence of wind stress. If the flow exhibits collapses we consider how topography and wind stress affect the ensuing oscillations. Large scale slope up towards the north

  5. A Continuous ` \\Gamma oe Vertical Coordinate for a Baroclinic Model of the Atmospheric Circulation

    E-Print Network [OSTI]

    Drake, John B.

    meteorolgoical coordinate system is developed which can support a continuous isentropic­ oe vertical coordinate and boundary layer approximations were addressed by the introduction of a hybrid (patched) model [15]. By use analysis [14, 8]. The effects of heating on the circulation are most clearly seen with the isentropic

  6. Ocean Heat Transport , Overturning Circulations, and some fine-resolution ASOF dynamics

    E-Print Network [OSTI]

    , seasonal storage of heat in the mixed layer balances air/sea heat flux, so only a mixed layer ocean of Europe? (i.e., is air-sea heat flux dominated by seasonal storage in the mixed layer?) We have argued, it is thermally driven'. Why? -salt diffusion is essential to overturning circulation, -diffusion is molecular

  7. Telomere length in circulating leukocytes is associated with lung function and

    E-Print Network [OSTI]

    Nyholt, Dale R.

    Telomere length in circulating leukocytes is associated with lung function and disease Eva Albrecht intrinsic age-related processes contribute to the interindividual variability of lung function. Our meta-analysis of 14 studies included 934 COPD cases with 15846 controls defined according to the Global Lungs

  8. Eocene circulation of the Southern Ocean: Was Antarctica kept warm by subtropical waters?

    E-Print Network [OSTI]

    Döös, Kristofer

    climate model simulations. We find that the EAC did not penetrate to high latitudes and ocean heatEocene circulation of the Southern Ocean: Was Antarctica kept warm by subtropical waters? Matthew suddenly grew and ocean productivity patterns changed. Previous studies conjectured that poleward

  9. Impacts of Shortwave Penetration Depth on Large-Scale Ocean Circulation and Heat Transport

    E-Print Network [OSTI]

    Gnanadesikan, Anand

    Impacts of Shortwave Penetration Depth on Large-Scale Ocean Circulation and Heat Transport COLM independent parameter- izations that use ocean color to estimate the penetration depth of shortwave radiation. This study offers a way to evaluate the changes in irradiance penetration depths in coupled ocean

  10. An unsteady wave driver for narrowbanded waves: modeling nearshore circulation driven by wave groups

    E-Print Network [OSTI]

    Kirby, James T.

    An unsteady wave driver for narrowbanded waves: modeling nearshore circulation driven by wave Abstract In this paper, we derive an unsteady refraction­diffraction model for narrowbanded water waves for use in computing coupled wave­current motion in the nearshore. The end result is a variable

  11. Water masses and circulation pathways through the Iceland Basin during Vivaldi 1996

    E-Print Network [OSTI]

    Water masses and circulation pathways through the Iceland Basin during Vivaldi 1996 R. T. Pollard through the middle of the Iceland Basin as far as 60°N, 20°W. A second branch (the Northern Branch or Sub into the northern Iceland Basin between Rockall and Lousy Banks. This saline, weakly stratified tongue can be traced

  12. Design and measured performance of a solar chimney for natural circulation solar energy dryers

    SciTech Connect (OSTI)

    Ekechukwu, O.V. [Univ. of Nigeria, Naukka (Nigeria). Energy Research Centre; Norton, B. [Univ. of Ulster, Newtownabbey (Ireland)

    1996-02-01

    An experimental solar chimney consisted of a cylindrical polyethylene-clad vertical chamber supported by steel framework and draped internally with a selectively absorbing surface. The performance of the chimney which was monitored extensively is reported. Issues related to the design and construction of solar chimneys for natural circulation solar energy dryers are discussed.

  13. Greening the terrestrial biosphere: simulated feedbacks on atmospheric heat and energy circulation

    E-Print Network [OSTI]

    Cowling, Sharon A.

    Greening the terrestrial biosphere: simulated feedbacks on atmospheric heat and energy circulation on atmospheric exchange of heat and moisture. Our CONTROL simulation had a mean global net primary production (NPP) of 56.3 GtCyr-1 which is half that of our scenario value of 115.1 GtCyr-1 . LAI and latent energy

  14. Wintertime Northern Bering Sea Tip Jets and their Impact on Oceanic Circulation

    E-Print Network [OSTI]

    Pickart, Robert S.

    Wintertime Northern Bering Sea Tip Jets and their Impact on Oceanic Circulation G, 12 #12; 2 Abstract: Low-level regions of high wind speed known as tip jets have been identified show that tips jets characterized by enhanced northeasterly winds occur in the vicinity of the two

  15. DRAFT: PLEASE DO NOT CITE OR DISTRIBUTE WITHOUT PERMISSION Brain Circulation and Chinese Chipmakers

    E-Print Network [OSTI]

    Saxenian, AnnaLee

    spent more than a dozen years in the U.S., first obtaining a doctorate in electrical engineering from from developing to developed economies, is giving way to a two-way process of "brain circulation countries, others start companies in the U.S. with operations at home or build cross-regional alliances

  16. Observations and Numerical Simulations of Urban Heat Island and Sea Breeze Circulations over New York City

    E-Print Network [OSTI]

    Raman, Sethu

    (HIC) associated with an urban area can significantly alter lower tropospheric winds and lowObservations and Numerical Simulations of Urban Heat Island and Sea Breeze Circulations over New disaster on September 11, 2001. An ARPS model numerical simulation was conducted to explore the complex

  17. 2012 Changing Arctic Ocean 506E/497E -Lecture 7 -Woodgate Schematic Surface and Atlantic Circulation

    E-Print Network [OSTI]

    Washington at Seattle, University of

    LHW ­ Lower Halocline Water AW ­ Atlantic Water DW ­ Deep Water WESTERN ARCTIC (PACIFIC) HALOCLINE Halocline Water LHW ­ Lower Halocline Water AW ­ Atlantic Water DW ­ Deep Water European Speak: e.g. Manley Circulation Jones, 2001 Typical Arctic profiles Bottom Water "the rest" Western Arctic warmer ATLANTIC WATER T

  18. First Tracer Test After Circulation in Desert Peak 27-15

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

    Rose, Peter

    Following the successful stimulation of Desert Peak target EGS well 27-15, a circulation test was initiated by injecting a conservative tracer (1,5-nds) in combination with a reactive tracer (7-amino-1,3-naphthalene disulfonate). The closest production well 74-21 was monitored over the subsequent several months.

  19. Evaluating carbon sequestration efficiency in an ocean circulation model by adjoint sensitivity analysis

    E-Print Network [OSTI]

    Follows, Mick

    Evaluating carbon sequestration efficiency in an ocean circulation model by adjoint sensitivity the application of the adjoint method to develop three-dimensional maps of carbon sequestration efficiency. Sequestration efficiency (the percentage of carbon injected at a continuous point source that remains

  20. Parameterization of gravity current entrainment for ocean circulation models using a high-order 3D

    E-Print Network [OSTI]

    Ozgökmen, Tamay M.

    Parameterization of gravity current entrainment for ocean circulation models using a high-order 3D on the work by Turner [Turner, J.S., 1986. The development of the entrainment assumption and its application. Weather Rev. 128, 1402­1419], an algebraic parameterization of the entrainment process in gravity current

  1. Modeling wind-driven circulation during the March 1998 sediment resuspension event in Lake Michigan

    E-Print Network [OSTI]

    Modeling wind-driven circulation during the March 1998 sediment resuspension event in Lake Michigan Lake Michigan caused by a storm with winds up to 20 m/s. The hydrodynamic model is driven with surface winds derived from observed meteorological conditions at 18 land stations and a meteorological buoy

  2. DETECTING AND TRACKING OF MESOSCALE OCEANIC FEATURES IN THE MIAMI ISOPYCNIC CIRCULATION OCEAN MODEL

    E-Print Network [OSTI]

    Tandon, Amit

    DETECTING AND TRACKING OF MESOSCALE OCEANIC FEATURES IN THE MIAMI ISOPYCNIC CIRCULATION OCEAN MODEL developed to automatically detect, locate and track mesoscale eddies spatially and temporally. Using an invaluable tool to assess mesoscale oceanic features. Key Words ­ Scientific Visualization, Eddy Detection

  3. POISSON CONVERGENCE OF EIGENVALUES OF CIRCULANT TYPE ARUP BOSE*, RAJAT SUBHRA HAZRA, AND KOUSHIK SAHA**

    E-Print Network [OSTI]

    Bandyopadhyay, Antar

    , AND KOUSHIK SAHA** Abstract. We consider the point processes based on the eigenvalues of the reverse circulant and Peche (2008) to 2 Saha (2009) establish the distributional by CSIR Fellowship, Govt. of India. #12;2 ARUP BOSE, R. S. HAZRA, AND K.SAHA These eigenvalues are given

  4. On thermoelectric power conversion from heat re-circulating combustion systems F. J. Weinberg

    E-Print Network [OSTI]

    On thermoelectric power conversion from heat re-circulating combustion systems F. J. Weinberg Fax: 4420 7594 5604 Word count: 3750 Diags. equivalent: 1600 5350 #12;On thermoelectric power the absolute maximum efficiency of energy conversion by thermoelectric devices that operate as part of the heat

  5. CURRICULUM VITAE GENERAL INFORMATION

    E-Print Network [OSTI]

    for the Petroleum Industry, Spain Consultant 1995, Maxus and Pertamina Oil Companies, Indonesia Consultant 1991, Petroleum Research Section (2001-2005), Stratigraphic Research Section (2005-present), Kansas Geological of Kansas Associate Scientist: July 1995- 2001, Carbonate Sedimentologist/Sequence Stratigrapher, Petroleum

  6. MODELING STRATEGIES TO COMPUTE NATURAL CIRCULATION USING CFD IN A VHTR AFTER A LOFA

    SciTech Connect (OSTI)

    Yu-Hsin Tung; Richard W. Johnson; Ching-Chang Chieng; Yuh-Ming Ferng

    2012-11-01

    A prismatic gas-cooled very high temperature reactor (VHTR) is being developed under the next generation nuclear plant program (NGNP) of the U.S. Department of Energy, Office of Nuclear Energy. In the design of the prismatic VHTR, hexagonal shaped graphite blocks are drilled to allow insertion of fuel pins, made of compacted TRISO fuel particles, and coolant channels for the helium coolant. One of the concerns for the reactor design is the effects of a loss of flow accident (LOFA) where the coolant circulators are lost for some reason, causing a loss of forced coolant flow through the core. In such an event, it is desired to know what happens to the (reduced) heat still being generated in the core and if it represents a problem for the fuel compacts, the graphite core or the reactor vessel (RV) walls. One of the mechanisms for the transport of heat out of the core is by the natural circulation of the coolant, which is still present. That is, how much heat may be transported by natural circulation through the core and upwards to the top of the upper plenum? It is beyond current capability for a computational fluid dynamic (CFD) analysis to perform a calculation on the whole RV with a sufficiently refined mesh to examine the full potential of natural circulation in the vessel. The present paper reports the investigation of several strategies to model the flow and heat transfer in the RV. It is found that it is necessary to employ representative geometries of the core to estimate the heat transfer. However, by taking advantage of global and local symmetries, a detailed estimate of the strength of the resulting natural circulation and the level of heat transfer to the top of the upper plenum is obtained.

  7. OLEDS FOR GENERAL LIGHTING

    SciTech Connect (OSTI)

    Anil Duggal; Don Foust; Chris Heller; Bill Nealon; Larry Turner; Joe Shiang; Nick Baynes; Tim Butler; Nalin Patel

    2004-02-29

    The goal of this program was to reduce the long term technical risks that were keeping the lighting industry from embracing and developing organic light-emitting diode (OLED) technology for general illumination. The specific goal was to develop OLEDs for lighting to the point where it was possible to demonstrate a large area white light panel with brightness and light quality comparable to a fluorescence source and with an efficacy comparable to that of an incandescent source. it was recognized that achieving this would require significant advances in three area: (1) the improvement of white light quality for illumination, (2) the improvement of OLED energy efficiency at high brightness, and (3) the development of cost-effective large area fabrication techniques. The program was organized such that, each year, a ''deliverable'' device would be fabricated which demonstrated progress in one or more of the three critical research areas. In the first year (2001), effort concentrated on developing an OLED capable of generating high illumination-quality white light. Ultimately, a down-conversion method where a blue OLED was coupled with various down-conversion layers was chosen. Various color and scattering models were developed to aid in material development and device optimization. The first year utilized this approach to deliver a 1 inch x 1 inch OLED with higher illumination-quality than available fluorescent sources. A picture of this device is shown and performance metrics are listed. To their knowledge, this was the first demonstration of true illumination-quality light from an OLED. During the second year, effort concentrated on developing a scalable approach to large area devices. A novel device architecture consisting of dividing the device area into smaller elements that are monolithically connected in series was developed. In the course of this development, it was realized that, in addition to being scalable, this approach made the device tolerant to the most common OLED defect--electrical shorts. This architecture enabled the fabrication of a 6 inch x 6 inch OLED deliverable for 2002. A picture of this deliverable is shown and the performance metrics are listed. At the time, this was the highest efficiency, highest lumen output illumination-quality OLED in existence. The third year effort concentrated on improving the fabrication yield of the 6 inch x 6 inch devices and improving the underlying blue device efficiency. An efficiency breakthrough was achieved through the invention of a new device structure such that now 15 lumen per watt devices could be fabricated. A 2 feet x 2 feet OLED panel consisting of sixteen 6 inch x 6 inch high efficiency devices tiled together was then fabricated. Pictures of this panel are shown with performance metrics listed. This panel met all project objectives and was the final deliverable for the project. It is now the highest efficiency, highest lumen output, illumination-quality OLED in existence.

  8. On the Influence of Weak Magnetic and Electric Fields on the Fluctuations of Ionic Electric Currents in Blood Circulation

    E-Print Network [OSTI]

    Zakirjon Kanokov; Juern W. P. Schmelzer; Avazbek K. Nasirov

    2009-04-07

    An analysis of a variety of existing experimental data leads to the conclusion on the existence of a resonance mechanism allowing weak magnetic fields to affect biological processes. These fields may either be static magnetic fields comparable in magnitude with the magnetic field of the earth or weak ultra-low frequency time-dependent fields. So far, a generally accepted theoretical model allowing one to understand the effect of magnetic and electric fields on biological processes is not available. By this reason, it is not clear which characteristics of the fields, like magnetic and electric field strength, frequency of change of the field, shape of the electromagnetic wave, the duration of the magnetic or electric influence or some particular combination of them, are responsible for the biological effect. In the present analysis it is shown that external time-independent magnetic fields may cause a resonance amplification of ionic electric currents in biological tissues and, in particular, in the vasculature system due to a Brownian motion of charges. These resonance electric currents may cause necrotic changes in the tissues or blood circulation and in this way significantly affect the biological organism. The magnitude of the magnetic fields leading to resonance effects is estimated, it is shown that it depends significantly on the radius of the blood capillaries.

  9. Research and Development | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Awards Mo-99 Cooperative Agreement to General Atomics Stewardship Science Academic Alliances Awards Research, Development, Test, and Evaluation Material Management and...

  10. Forest Research Annual Report and Accounts 20012002

    E-Print Network [OSTI]

    Forest Research Annual Report and Accounts 2001­2002 An Agency of the Forestry Commission #12;#12;Forest Research Annual Report and Accounts 2001­2002 Together with the Comptroller and Auditor General

  11. General Infrastructure Services

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERALProblemsGeneral Information GeneralOn the

  12. General Presentation Template

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERALProblemsGeneral Information GeneralOnSteve

  13. General User Proposals (GUPs)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERALProblemsGeneral InformationGeneral User

  14. Policies and Procedures for Human Subject Research Procedures for the Review of Human Subjects Research

    E-Print Network [OSTI]

    Policies and Procedures for Human Subject Research June 1997 #12;Procedures for the Review of Human Subjects Research I. General Description of the System of Review of Research Involving Human Subjects involving human subjects must be reviewed prior to conducting any research. Research studies which involve

  15. Parking Legend General Parking

    E-Print Network [OSTI]

    Anderson, Paul R.

    Parking Legend General Parking Faculty/Staff Parking Satellite/Freshman Lot Sophomore Parking Reserved Parking Off-Campus Parking (OC) Visitor/Off Campus Employee Parking Visitor Parking Winston-Salem First Church Vehicle Parking Only WFU-Owned Residential Theme Housing Call Boxes (Emergency Phones) Z2

  16. Optimization Under Generalized Uncertainty

    E-Print Network [OSTI]

    Lodwick, Weldon

    11 Optimization Under Generalized Uncertainty Optimization Modeling Math 4794/5794: Spring 2013 Weldon A. Lodwick Weldon.Lodwick@ucdenver.edu 2/14/2013 Optimization Modeling - Spring 2013 #12 in the context of optimization problems. The theoretical frame-work for these notes is interval analysis. From

  17. 38520152016 GENERAL BULLETIN Mathematics

    E-Print Network [OSTI]

    Hung, I-Kuai

    3852015­2016 GENERAL BULLETIN Sciences& Mathematics THE COLLEGE OF SCIENCES AND MATHEMATICS A primary aim of the College of Sciences and Mathematics is to contribute to the liberal arts education of all students through the presentation of fundamental con- cepts and methods of science and mathematics

  18. DRILLING MACHINES GENERAL INFORMATION

    E-Print Network [OSTI]

    Gellman, Andrew J.

    TC 9-524 Chapter 4 DRILLING MACHINES GENERAL INFORMATION PURPOSE This chapter contains basic information pertaining to drilling machines. A drilling machine comes in many shapes and sizes, from small hand-held power drills to bench mounted and finally floor-mounted models. They can perform operations

  19. General Syllabus Physics 45100

    E-Print Network [OSTI]

    Brinkmann, Peter

    General Syllabus Physics 45100 Thermodynamics and Statistical Physics Designation: Undergraduate Catalog description: 45100: Thermodynamics and Statistical Physics Temperature; equation of state; work and statistical mechanics; low-temperature physics; the Third Law. 3 HR./Wk.; 3 CR. Prerequisites: Physics 35100

  20. Constrained Generalized Supersymmetries

    SciTech Connect (OSTI)

    Toppan, Francesco; Kuznetsova, Zhanna

    2005-10-17

    We present a classification of admissible types of constraint (hermitian, holomorphic, with reality condition on the bosonic sectors, etc.) for generalized supersymmetries in the presence of complex spinors. A generalized supersymmetry algebra involving n-component real spinors Qa is given by the anticommutators {l_brace}Q{sub a},Q{sub b}{r_brace} = Z{sub ab} where the matrix Z appearing in the r.h.s. is the most general symmetric matrix. A complex generalized supersymmetry algebra is expressed in terms of complex spinors Qa and their complex conjugate Q* a. The most general (with a saturated r.h.s.) algebra is in this case given by {l_brace}Q{sub a},Q{sub b}{r_brace} P{sub ab}{l_brace}Q*{sub a}, Q*{sub b}{r_brace} = P*{sub ab}{l_brace}Q{sub a},Q*{sub b}{r_brace} = R{sub ab} where the matrix Pab is symmetric, while Rab is hermitian. The bosonic right hand side can be expressed in terms of the rank-k totally antisymmetric tensors P{sub ab} {sigma}k(C{gamma}{sub [{mu}}{sub 1...{mu}}{sub k]}){sub ab}P{sup [{mu}{sup 1...{mu}{sup k}]}.The decomposition in terms of anti-symmetric tensors for any space-time up to dimension D = 13 is presented. Real type, complex type, and quaternionic type space-times are classified. Any restriction on the saturated bosonic generators that allows all possible combinations of these tensors is in principle admissible by a Lorenz-covariant requirement. We investigate division algebra constraints and their influence on physical models. High spin theory models are presented as examples of the applications of such models.

  1. he e-mails leaked from the University of East Anglia's Climatic Research Unit

    E-Print Network [OSTI]

    Nizkorodov, Sergey

    Earth's climate system and its com- ponents, and yes, nothing has been made clear enough to the public used to simulate Earth's climate are general circulation models (GCMs), which represent physical changes and the inability of climate models to simulate such warming without including the role

  2. General Relativistic Radiative Transfer and GeneralRelativistic...

    Office of Scientific and Technical Information (OSTI)

    systems using a fully general relativistic radiative transfer formulation, with flow structures obtained by general relativistic magneto-hydrodynamic simulations. We consider...

  3. ASHRAE Transactions: Research 107 Commercial buildings and institutions are generally

    E-Print Network [OSTI]

    can be integrated into the ground-loop heat exchanger design. GSHP systems that incorporate some type cooling-dominatedand therefore rejectmore heat to a ground- loop heat exchanger than they extract over as supplemental heat rejecters in GSHP systems. Through this example, it is shown that ground-loop heat exchanger

  4. ASHRAE Transactions: Research 107 Commercial buildings and institutions are generally

    E-Print Network [OSTI]

    for modeling the performance of a shallow pond as a supplemental heat rejecter in ground- source heat pump Ground-source heat pump (GSHP) systems have become increasingly popular for both residential, under these circumstances, ground-source heat pump systems may be eliminated from consideration during

  5. General support for integrated assessment research. Final report

    SciTech Connect (OSTI)

    Dowlatabadi, Hadi

    2001-03-01

    The climate change problem spans an extraordinarily large number of disciplines from earth sciences to social and political sciences. The interaction of processes described by these different fields is why climate change is such a complex issue. Keeping track of these interactions and bringing coherence to the assumptions underlying each disciplinary insight on the climate problem is a massive undertaking. Integrated assessment is an interdisciplinary approach designed to provide systematic evaluations of technically complex problems such as the analysis of environmental change challenges facing humanity. Ph.D. theses stemming from this application are summarized. Then some aspects of Integrated Climate Assessment Models are described.

  6. PROJECT PROFILE: General Electric - GE Global Research | Department of

    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 Data Center Home Page on Delicious RankADVANCED MANUFACTURINGEnergy Bills andOrder 422.1, CONDUCT P - . . -

  7. Renzo Tomellini, EC Directorate General for Research and innovation,

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematicsEnergyInterested PartiesBuildingBudgetFinancialReliabilityEnergyRenewable

  8. Microfluidics and Nanoscale Research Profile

    E-Print Network [OSTI]

    Microfluidics and Nanoscale Science Research Profile Our research group is engaged in a broad range of activities in the general area of microfluidics and nanoscale science. At a primary level, our interest that when compared to macroscale tech- nology, microfluidic systems engender a number of distinct advantages

  9. On the Roles of the Secondary Circulation in the Formation of Hurricanes

    E-Print Network [OSTI]

    Kieu, C Q

    2006-01-01

    Secondary circulations (SC) associated with hurricanes are traditionally regarded as small perturbations superimposed on the primary circulations (PC). The reason behind this treatment roots in an observation that the magnitude of the SC is about 10 orders of magnitude smaller than that of the PC. This approximation underlines all of the hurricane theories up until now. Recently, Kieu (2004) proposes a revitalizing theory for the development of hurricanes for which a class of exact solutions of the primitive equations is obtained explicitly without appealing to scaling approximation. The solutions share some of the most important dynamical aspects with observations. According to this theory, the SC turns out to be particular important in determining the three-dimensional structure and temporal evolution of axisymmetric hurricanes. Like all theories for the hurricane development, Kieu's theory however contains an infinite growth of the SC with time. In this study, it will be shown that the infinite growth does...

  10. Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion System

    SciTech Connect (OSTI)

    Wei-Ping Pan; Yan Cao; Songgeng Li

    2006-04-01

    This report is to present the progress made on the project ''Establishment of an Environmental Control Technology Laboratory (ECTL) with a Circulating Fluidized-Bed Combustion (CFBC) System'' during the period January 1, 2006 through March 31, 2006. Work was performed on the following activities. First, the fabrication and manufacture of the CFBC Facility were completed. The riser, primary cyclone and secondary cyclone of Circulating Fluidized Bed (CFB) Combustor have been erected. Second, the Mercury Control Workshop and the Grand Opening of Institute for Combustion Science and Environmental Technology (ICSET) were successfully held on February 22 and 23, 2006, respectively. Third, effects of hydrogen chlorine (HCl) and sulfur dioxide (SO{sub 2}) on mercury oxidation were studied in a drop tube reactor. The experimental results from this study are presented in this report. Finally, the proposed work for the next quarter is described in this report.

  11. Validation of a plant dynamics code for 4S - Test analysis of natural circulation behavior

    SciTech Connect (OSTI)

    Sebe, F.; Horie, H.; Matsumiya, H.; Fanning, T. H.

    2012-07-01

    A plant transient dynamics code for a sodium-cooled fast reactor was developed by Toshiba. The code is used to evaluate the safety performance of Super-Safe, Small, and Simple reactor (4S) for Anticipated Operational Occurrences (AOOs), Design Basis Accident (DBA) and Beyond DBA (BDBA). The code is currently undergoing verification and validation (V and V). As one of the validation, test analysis of the Shutdown Heat Removal Test (SHRT)-17 performed in the Experimental Breeder Reactor (EBR)-II was conducted. The SHRT-17 is protected loss of flow test. The purpose of this validation is to confirm capability of the code to simulate natural circulation behavior of the plant. As a result, good agreements are shown between the analytical results and the measured data which were available from instrumented subassembly. The detailed validation result of the natural circulation behavior is described in this paper. (authors)

  12. Regulation XVI: GENERAL UNIVERSITY REGULATIONS

    E-Print Network [OSTI]

    Regulation XVI: GENERAL UNIVERSITY REGULATIONS APPLICATION AND INTERPRETATION 1. Unless stated otherwise, these and the following Regulations apply to students in all Faculties, including the International Faculty: General Regulations for First Degrees; General Regulations for Higher Degrees

  13. MTL ANNUAL RESEARCH REPORT 2014 Research Centers 207 Research Centers

    E-Print Network [OSTI]

    Reif, Rafael

    MTL ANNUAL RESEARCH REPORT 2014 Research Centers 207 Research Centers Center for Integrated ................................................................................................................................ 171 Energy Frontier Research Center for Excitonics ........................................................................................................... 175 #12;208 Research Centers MTL ANNUAL RESEARCH REPORT 2014 #12;MTL ANNUAL RESEARCH REPORT 2014

  14. Postdoctoral Research Awards Annual Research Meeting: Joseph...

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

    Joseph Mondloch Postdoctoral Research Awards Annual Research Meeting: Joseph Mondloch Postdoctoral Research Awards Annual Research Meeting: Joseph Mondloch poster presentation....

  15. A PC simulation of heat transfer and temperature distribution in a circulating wellbore 

    E-Print Network [OSTI]

    Pierce, Robert Duane

    1987-01-01

    -Wold (Chair of Committee) James E. Russell (Member) Earl R. Hoskins (Member) D, Von Gonton (H ad of Department) December 1987 ABSTRACT A PC Simulation of Heat Transfer and Temperature Distribution in a Circulating Wellbore (December 1987) Robert... SUPPLEMENTAL SOURCES CONSULTED APPENDIX A: MATHEMATICAL MODEL AND TREATMENT 103 108 APPENDIX B: DERIVATION OF RAMEY'SS WELLBORE HEAT TRANSMISSION SOLUTION 112 APPENDIX C: RHEOLOGICAL PRESSURE LOSS MODEL CALCULATIONS APPENDIX D: OVER-ALL HEAT TRANSFER...

  16. Contribution of circulation changes to recent and future temperature extremes in Europe

    E-Print Network [OSTI]

    Contribution of circulation changes to recent and future temperature extremes in Europe J. Cattiaux.cattiaux@meteo.fr The exceptionally mild autumn 2006 T2m anomaly: on average 2.5K (3.2 ), and exceeding 5K over North-Western Europe = 0.7) misses the recent warming (Fig 4). Recent warming and extremes in Europe Figure 2. T2m (left

  17. Generalized constructive tree weights

    SciTech Connect (OSTI)

    Rivasseau, Vincent E-mail: adrian.tanasa@ens-lyon.org; Tanasa, Adrian E-mail: adrian.tanasa@ens-lyon.org

    2014-04-15

    The Loop Vertex Expansion (LVE) is a quantum field theory (QFT) method which explicitly computes the Borel sum of Feynman perturbation series. This LVE relies in a crucial way on symmetric tree weights which define a measure on the set of spanning trees of any connected graph. In this paper we generalize this method by defining new tree weights. They depend on the choice of a partition of a set of vertices of the graph, and when the partition is non-trivial, they are no longer symmetric under permutation of vertices. Nevertheless we prove they have the required positivity property to lead to a convergent LVE; in fact we formulate this positivity property precisely for the first time. Our generalized tree weights are inspired by the Brydges-Battle-Federbush work on cluster expansions and could be particularly suited to the computation of connected functions in QFT. Several concrete examples are explicitly given.

  18. General Relativistic Radiative Transfer

    E-Print Network [OSTI]

    S. Knop; P. H. Hauschildt; E. Baron

    2006-11-30

    We present a general method to calculate radiative transfer including scattering in the continuum as well as in lines in spherically symmetric systems that are influenced by the effects of general relativity (GR). We utilize a comoving wavelength ansatz that allows to resolve spectral lines throughout the atmosphere. The used numerical solution is an operator splitting (OS) technique that uses a characteristic formal solution. The bending of photon paths and the wavelength shifts due to the effects of GR are fully taken into account, as is the treatment of image generation in a curved spacetime. We describe the algorithm we use and demonstrate the effects of GR on the radiative transport of a two level atom line in a neutron star like atmosphere for various combinations of continuous and line scattering coefficients. In addition, we present grey continuum models and discuss the effects of different scattering albedos on the emergent spectra and the determination of effective temperatures and radii of neutron star atmospheres.

  19. A Generalized Deletion Machine

    E-Print Network [OSTI]

    Indranil Chakrabarty; Satyabrata Adhikari

    2005-11-22

    In this work we prescribe a more generalized quantum-deleting machine (input state dependent). The fidelity of deletion is dependent on some machine parameters such that on alteration of machine parameters we get back to standard deleting machines. We also carried out a various comparative study of various kinds of quantum deleting machines. We also plotted graphs, making a comparative study of fidelity of deletion of the deletion machines, obtained as particular cases on changing the machine parameters of our machine.

  20. General User Proposals (GUPs)

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERALProblemsGeneral Information

  1. Generalized utility metrics for supercomputers

    E-Print Network [OSTI]

    Strohmaier, Erich

    2009-01-01

    2007:1–12 Generalized utility metrics for supercomputers 12.ISSUE PAPER Generalized utility metrics for supercomputersproblem of ranking the utility of supercom- puter systems

  2. Generalized Adaptive A* Xiaoxun Sun

    E-Print Network [OSTI]

    Yeoh, William

    Generalized Adaptive A* Xiaoxun Sun USC Computer Science Los Angeles, California xiaoxuns spaces changes. Adaptive A* [7] is a Cite as: Generalized Adaptive A*, Xiaoxun Sun, Sven Koenig

  3. Study of natural circulation in a VHTR after a LOFA using different turbulence models

    SciTech Connect (OSTI)

    Yu-Hsin Tung; Yuh-Ming Ferng; Richard W. Johnson; Ching-Chang Chieng

    2013-10-01

    Natural convection currents in the core are anticipated in the event of the failure of the gas circulator in a prismatic gas-cooled very high temperature reactor (VHTR). The paths that the helium coolant takes in forming natural circulation loops and the effective heat transport are of interest. The heated flow in the reactor core is turbulent during normal operating conditions and at the beginning of the LOFA with forced convection, but the flow may significantly be slowed down after the event and laminarized with mixed convection. In the present study, the potential occurrence and effective heat transport of natural circulation are demonstrated using computational fluid dynamic (CFD) calculations with different turbulence models as well as laminar flow. Validations and recommendation on turbulence model selection are conducted. The study concludes that large loop natural convection is formed due to the enhanced turbulence levels by the buoyancy effect and the turbulent regime near the interface of upper plenum and flow channels increases the flow resistance for channel flows entering upper plenum and thus less heat can be removed from the core than the prediction by laminar flow assumption.

  4. Generalized Domination in Graphs with Applications in Wireless Networks 

    E-Print Network [OSTI]

    Sung, Je Sang

    2013-12-10

    The objective of this research is to study practical generalization of domination in graphs and explore the theoretical and computational aspects of models arising in the design of wireless networks. For the construction of a virtual backbone of a...

  5. Automated safety and training avionics for general aviation aircraft 

    E-Print Network [OSTI]

    Trang, Jeffrey Alan

    1997-01-01

    and Training Avionics (ASTRA). ASTRA research is focused on integrating low-cost, yet sophisticated, computing technology into general aviation aircraft. The system architecture includes a Flight Mode Interpreter (FMI), which provides real-time identification...

  6. UGA DESIGN & CONSTRUCTION SUPPLEMENTAL GENERAL REQUIREMENTS & STANDARDS GENERAL UTILITIES REQUIREMENTS

    E-Print Network [OSTI]

    Arnold, Jonathan

    UGA DESIGN & CONSTRUCTION SUPPLEMENTAL GENERAL REQUIREMENTS & STANDARDS GENERAL UTILITIES REQUIREMENTS JANUARY 16, 2015 33 00 001 33 00 00 GENERAL UTILITIES REQUIREMENTS 1. GENERAL A. Related sections: i. 01 41 26.02 ­ Utility Information & Locate ii. 23 05 19 ­ Meters and Gages iii

  7. Cross-shelf circulation and momentum and heat balances over the inner continental shelf near Martha's Vineyard, Massachusetts

    E-Print Network [OSTI]

    Fewings, Melanie Rinn

    2007-01-01

    The water circulation and evolution of water temperature over the inner continental shelf are investigated using observations of water velocity, temperature, density, and bottom pressure; surface gravity waves; wind stress; ...

  8. b. Project Summary This is an experimental investigation of the oceanic circulation and its small-scale, yet

    E-Print Network [OSTI]

    focus. There, several external sources of circulation have been identified (wind, deep convection using a layered, hydrostatic ocean model. The specific experiments planned are (i), the concentration, also optically. The fourth set of experiments requires special comment. Numerical modeling

  9. The effect of stratification on wind-driven, cross-shelf circulation and transport on the inner continental shelf

    E-Print Network [OSTI]

    Horwitz, Rachel Mandy

    2012-01-01

    Observations from a three-year field program on the inner shelf south of Martha's Vineyard, MA and a numerical model are used to describe the effect of stratification on inner shelf circulation, transport, and sediment ...

  10. Use of the parabiotic model in studies of cutaneous wound healing to define the participation of circulating cells

    E-Print Network [OSTI]

    Song, Guodong

    Previous experimental studies to assess the contribution of blood-borne circulating (BBC) cells to cutaneous wound healing have relied on discontinuous pulsing of labeled BBC elements or bone marrow transplant protocols. ...

  11. Deep and Surface Circulation in the Northwest Indian Ocean from Argo, Surface Drifter, Satellite, and In Situ Profiling Current Observations 

    E-Print Network [OSTI]

    Stryker, Sarah

    2012-10-19

    , but little is understood about the Sea of Oman. This thesis incorporated observations from Argo floats, surface drifters and satellite imagery to study the deep and surface circulation in the northwest Indian Ocean. An assessment of four independent moorings...

  12. Development and Implementation of a Composite Model for Wave, Circulation, and Sediment Processes in Ibaka Deep Seaport in Nigeria 

    E-Print Network [OSTI]

    Paul, Ephraim Udo

    2014-06-20

    In-­?depth knowledge of nearshore wave, circulation, and sediment processes are vital to effective and efficient management, operation, and regulation of ports and harbors. The scientific knowledge of these processes is currently lacking in Ibaka...

  13. Deglacial Neodymium Isotopic Ratios in the Florida Straits and the Response of Intermediate Waters to Reduced Meridional Overturning Circulation 

    E-Print Network [OSTI]

    Franklin, Alyssa L.

    2010-07-14

    studied using conventional paleo-circulation tracers. In this study we measure Nd isotopes in sediments of the Florida Straits to investigate this discrepancy. Nd isotope ratios in the authigenic component of marine sediments are thought to be a reliable...

  14. Plant Design and Cost Estimation of a Natural Circulation Lead-Bismuth Reactor with Helium Power Conversion Cycle

    E-Print Network [OSTI]

    Kim, D.

    The analysis of an indirect helium power conversion system with lead-bismuth natural circulation primary system has been performed. The work of this report is focused on 1) identifying the allowable design region for the ...

  15. JV Task 108 - Circulating Fluidized-Bed Combustion and Combustion Testing of Turkish Tufanbeyli Coal

    SciTech Connect (OSTI)

    Douglas Hajicek; Jay Gunderson; Ann Henderson; Stephen Sollom; Joshua Stanislowski

    2007-08-15

    Two combustion tests were performed at the Energy & Environmental Research Center (EERC) using Tufanbeyli coal from Turkey. The tests were performed in a circulating fluidized-bed combustor (CFBC) and a pulverized coal-fired furnace, referred to as the combustion test facility (CTF). One of the goals of the project was to determine the type of furnace best suited to this coal. The coal is high in moisture, ash, and sulfur and has a low heating value. Both the moisture and the sulfur proved problematic for the CTF tests. The fuel had to be dried to less than 37% moisture before it could be pulverized and further dried to about 25% moisture to allow more uniform feeding into the combustor. During some tests, water was injected into the furnace to simulate the level of flue gas moisture had the fuel been fed without drying. A spray dryer was used downstream of the baghouse to remove sufficient sulfur to meet the EERC emission standards permitted by the North Dakota Department of Health. In addition to a test matrix varying excess air, burner swirl, and load, two longer-term tests were performed to evaluate the fouling potential of the coal at two different temperatures. At the lower temperature (1051 C), very little ash was deposited on the probes, but deposition did occur on the walls upstream of the probe bank, forcing an early end to the test after 2 hours and 40 minutes of testing. At the higher temperature (1116 C), ash deposition on the probes was significant, resulting in termination of the test after only 40 minutes. The same coal was burned in the CFBC, but because the CFBC uses a larger size of material, it was able to feed this coal at a higher moisture content (average of 40.1%) compared to the CTF (ranging from 24.2% to 26.9%). Sulfur control was achieved with the addition of limestone to the bed, although the high calcium-to-sulfur rate required to reduce SO{sub 2} emissions resulted in heat loss (through limestone calcination) and additional ash handling. A more efficient downstream sulfur scrubber capable of operation at a much lower Ca/S ratio would result in significantly higher boiler efficiency for this coal. At the operating temperature of a typical CFBC, bed agglomeration and convective pass fouling are not likely to be significant problems with this fuel. Compared to pulverized coal-firing, CFBC technology is clearly the better choice for this fuel. It provides more efficient sulfur capture, lower NO{sub x} emissions, better solids-handling capability, and can utilize a wetter feedstock, requiring less crushing and sizing. The lower operating temperature of CFBC boilers (820 C) reduces the risk of fouling and agglomeration. Care must be taken to minimize heat loss in the system to accommodate the low heating value of the coal.

  16. Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion System

    SciTech Connect (OSTI)

    Wei-Ping Pan; Yan Cao; John Smith

    2008-05-31

    On February 14, 2002, President Bush announced the Clear Skies Initiative, a legislative proposal to control the emissions of nitrogen oxides (NO{sub x}), sulfur dioxide (SO{sub 2}), and mercury from power plants. In response to this initiative, the National Energy Technology Laboratory organized a Combustion Technology University Alliance and hosted a Solid Fuel Combustion Technology Alliance Workshop. The workshop identified multi-pollutant control; improved sorbents and catalysts; mercury monitoring and capture; and improved understanding of the underlying reaction chemistry occurring during combustion as the most pressing research needs related to controlling environmental emissions from fossil-fueled power plants. The Environmental Control Technology Laboratory will help meet these challenges and offer solutions for problems associated with emissions from fossil-fueled power plants. The goal of this project was to develop the capability and technology database needed to support municipal, regional, and national electric power generating facilities to improve the efficiency of operation and solve operational and environmental problems. In order to effectively provide the scientific data and the methodologies required to address these issues, the project included the following aspects: (1) Establishing an Environmental Control Technology Laboratory using a laboratory-scale, simulated fluidized-bed combustion (FBC) system; (2) Designing, constructing, and operating a bench-scale (0.6 MW{sub th}), circulating fluidized-bed combustion (CFBC) system as the main component of the Environmental Control Technology Laboratory; (3) Developing a combustion technology for co-firing municipal solid waste (MSW), agricultural waste, and refuse-derived fuel (RDF) with high sulfur coals; (4) Developing a control strategy for gaseous emissions, including NO{sub x}, SO{sub 2}, organic compounds, and heavy metals; and (5) Developing new mercury capturing sorbents and new particulate filtration technologies. Major tasks during this period of the funded project's timeframe included: (1) Conducting pretests on a laboratory-scale simulated FBC system; (2) Completing detailed design of the bench-scale CFBC system; (3) Contracting potential bidders to fabricate of the component parts of CFBC system; (4) Assembling CFBC parts and integrating system; (5) Resolving problems identified during pretests; (6) Testing with available Powder River Basin (PRB) coal and co-firing of PRB coal with first wood pallet and then chicken wastes; and (7) Tuning of CFBC load. Following construction system and start-up of this 0.6 MW CFBC system, a variety of combustion tests using a wide range of fuels (high-sulfur coals, low-rank coals, MSW, agricultural waste, and RDF) under varying conditions were performed to analyze and monitor air pollutant emissions. Data for atmospheric pollutants and the methodologies required to reduce pollutant emissions were provided. Integration with a selective catalytic reduction (SCR) slipstream unit did mimic the effect of flue gas composition, including trace metals, on the performance of the SCR catalyst to be investigated. In addition, the following activities were also conducted: (1) Developed advanced mercury oxidant and adsorption additives; (2) Performed laboratory-scale tests on oxygen-fuel combustion and chemical looping combustion; and (3) Conducted statistical analysis of mercury emissions in a full-scale CFBC system.

  17. Georgia Tech Research Institute The Georgia Tech Research Institute (GTRI) is Georgia Tech's applied

    E-Print Network [OSTI]

    Li, Mo

    Georgia Tech Research Institute The Georgia Tech Research Institute (GTRI) is Georgia Tech general funds will further erode its ability to sustain its high level of external funding and its overall

  18. Fasting-induced suppression of circulating luteinizing hormone is caused by altered luteinizing hormone releasing-hormone secretion 

    E-Print Network [OSTI]

    Farr, Jaime Alan

    1992-01-01

    FASTING-INDUCED SUPPRESSION OF CIRCULATING LUTEINIZING HORMONE IS CAUSED IIY ALTERED LUTEINIZING HORMONE RELEASING-HORMONE SECREI'ION A Thesis JAIME ALAN FARR Submitted to the Office of Graduate Studies of Texas ARM University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE December 1992 Major Subject: Veterinary Anatomy FASTING-INDUCED SUPPRESSION OF CIRCULATING LUTEINIZING HORMONE IS CAUSED BY ALTERED LUTEINIZING HORMONE RELEASING-HORMONE SECRETION A...

  19. General | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainable UrbanKentucky: EnergyGateway EditOpen Energy InformationGeneral Jump

  20. 7He General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATION OFsafer The mp4 23He General

  1. 9He General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATION OFsaferHe General Table The

  2. 9Li General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATION OFsaferHe General Table

  3. A = 10 General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATIONPostdoctoral10 General Tables

  4. A = 5 General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATIONPostdoctoral10He5 General

  5. A = 6 General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATIONPostdoctoral10He5 General6

  6. A = 7 General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATIONPostdoctoral10He5 General67

  7. A = 8 General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATIONPostdoctoral10He5 General678

  8. A = 9 General Tables

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-InspiredAtmosphericdevicesPPONeApril351APPLICATIONPostdoctoral10He5 General6789

  9. 2011 IAEA General Conference

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirleyEnergyTher i n c i p a l De p u t y A s s i s t a nsecondof2011 Cost SymposiumIAEA General

  10. GENERAL TERMS & CONDITIONS

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformation Current HABFESOpportunities Nuclear Physics (NP)aboutRioGlobalGENERAL TERMS

  11. GENERAL PRINCIPLES OF AGREEMENT

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would likeUniverse (Journal Article)ForthcomingGENERAL ASSIGNMENT KNOW ALL MEN BY THESE1

  12. Secondary constructions on generalized bent functions Brajesh Kumar Singh

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    Secondary constructions on generalized bent functions Brajesh Kumar Singh Department of Mathematics of Maiorana-McFarland class of bent functions, for Research supported by CSIR, INDIA. #12;2 B. K. Singh q = 4. Recently, Stanica, Gangopadhyay and Singh [13] studied several proper- ties generalized bent Boolean

  13. Cultivating Global Science IN OUR RAPIDLY EXPANDING GLOBAL SCIENTIFIC RESEARCH ENTERPRISE, GOOD SCIENCE ANYWHERE

    E-Print Network [OSTI]

    Suresh, Subra

    .* The heads of major science and engineering research funding agen- cies from nearly 50 countries's unique needs for economic growth, national security, and human capital development. One major barrier synthesized into a coherent set of basic principles that were circulated for input from all participants

  14. RESEARCH STATEMENT

    E-Print Network [OSTI]

    2013-11-15

    ... costs of the measurements/model simulations are expensive, especially on high .... proposed in this research is the Markov Chain Monte Carlo sampling. For

  15. Research Statement

    E-Print Network [OSTI]

    2014-11-06

    days, Electronic Communications Networks provide an array that allows ... Processes such as general theory of Markov processes an point processes, weak ... treatment of statistical properties, with a clear exposition of important work in LOB ...

  16. Research Statement

    E-Print Network [OSTI]

    2014-11-11

    listed above highlight the utility of experimental design methods, where ... Generalizing convergence results for experimental design to encompass other design criteria that are .... chaos, Reliability Engineering & System Safety, 107 (

  17. Title 1 General Provisions Chapter 5 Common Law; General Rights...

    Open Energy Info (EERE)

    Title 1 General Provisions Chapter 5 Common Law; General Rights 3 V.S.A. Section 2809 Jump to: navigation, search OpenEI Reference LibraryAdd to library Legal Document-...

  18. Action Principle for the Generalized Harmonic Formulation of General Relativity

    E-Print Network [OSTI]

    J. David Brown

    2011-09-07

    An action principle for the generalized harmonic formulation of general relativity is presented. The action is a functional of the spacetime metric and the gauge source vector. An action principle for the Z4 formulation of general relativity has been proposed recently by Bona, Bona--Casas and Palenzuela (BBP). The relationship between the generalized harmonic action and the BBP action is discussed in detail.

  19. Parametric study of natural circulation flow in molten salt fuel in molten salt reactor

    SciTech Connect (OSTI)

    Pauzi, Anas Muhamad; Cioncolini, Andrea; Iacovides, Hector

    2015-04-29

    The Molten Salt Reactor (MSR) is one of the most promising system proposed by Generation IV Forum (GIF) for future nuclear reactor systems. Advantages of the MSR are significantly larger compared to other reactor system, and is mainly achieved from its liquid nature of fuel and coolant. Further improvement to this system, which is a natural circulating molten fuel salt inside its tube in the reactor core is proposed, to achieve advantages of reducing and simplifying the MSR design proposed by GIF. Thermal hydraulic analysis on the proposed system was completed using a commercial computation fluid dynamics (CFD) software called FLUENT by ANSYS Inc. An understanding on theory behind this unique natural circulation flow inside the tube caused by fission heat generated in molten fuel salt and tube cooling was briefly introduced. Currently, no commercial CFD software could perfectly simulate natural circulation flow, hence, modeling this flow problem in FLUENT is introduced and analyzed to obtain best simulation results. Results obtained demonstrate the existence of periodical transient nature of flow problem, hence improvements in tube design is proposed based on the analysis on temperature and velocity profile. Results show that the proposed system could operate at up to 750MW core power, given that turbulence are enhanced throughout flow region, and precise molten fuel salt physical properties could be defined. At the request of the authors and the Proceedings Editor the name of the co-author Andrea Cioncolini was corrected from Andrea Coincolini. The same name correction was made in the Acknowledgement section on page 030004-10 and in reference number 4. The updated article was published on 11 May 2015.

  20. A Test Facility for MEIC ERL Circulator Ring Based Electron Cooler Design

    SciTech Connect (OSTI)

    Zhang, Yuhong; Derbenev, Yaroslav S.; Douglas, David R.; Hutton, Andrew M.; Krafft, Geoffrey A.; Nissen, Edward W.

    2013-05-01

    An electron cooling facility which is capable to deliver a beam with energy up to 55 MeV and average current up to 1.5 A at a high bunch repetition rate up to 750 MHz is required for MEIC. The present cooler design concept is based on a magnetized photo-cathode SRF gun, an SRF ERL and a compact circulator ring. In this paper, we present a proposal of a test facility utilizing the JLab FEL ERL for a technology demonstration of this cooler design concept. Beam studies will be performed and supporting technologies will also be developed in this test facility.

  1. www.research.wayne.edu Research Handbook

    E-Print Network [OSTI]

    Finley Jr., Russell L.

    www.research.wayne.edu Research Handbook 2014-2015 #12;RESEARCH HANDBOOK TABLE OF CONTENTS Office of the Vice President for Research (OVPR) ....... Section 1 Research Programs and Resources.............................. Section 2 Seminars and Trainings................................................ Section 3 Research

  2. General anesthesia, sleep, and coma

    E-Print Network [OSTI]

    Brown, Emery N.

    In the United States, nearly 60,000 patients per day receive general anesthesia for surgery.1 General anesthesia is a drug-induced, reversible condition that includes specific behavioral and physiological traits — ...

  3. General anesthesia, sleep and coma

    E-Print Network [OSTI]

    Schiff, Nicholas D.

    In the United States, nearly 60,000 patients per day receive general anesthesia for surgery.1 General anesthesia is a drug-induced, reversible condition that includes specific behavioral and physiological traits — ...

  4. “Create a Bigger Monster:” Tobacco industry actions to neutralize three landmark Surgeon Generals’ Reports

    E-Print Network [OSTI]

    Klausner, Kim; Landman, Anne; Taketa, Rachel

    2014-01-01

    Blalock, JV. 1963a. Report on Public Relations Committee3 Public Relations Report to the Tobacco Industry ResearchUpcoming Surgeon General's Report]. Tobacco Institute. Bates

  5. Faculty of Science General Science

    E-Print Network [OSTI]

    Faculty of Science General Science The General Science program gives you maximum flexibility to explore the sciences, plus the core requirements you need for on-going, specialized studies. www.uwindsor.ca/science Rigorous, Enriching Programs The BSc General Science program is a great way to explore your many interests

  6. Research Theme Paper Research Themes...............................................................................................................................................3

    E-Print Network [OSTI]

    Wapstra, Erik

    Research Theme Paper May 2015 #12;Contents Research Themes&S).......................................................................................8 Environment, Resources and Sustainability Research Programs&M)...................................................................................................13 MA&M Research Program

  7. Postdoctoral Research Awards Annual Research Meeting: Brandon...

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

    Brandon Mercado Postdoctoral Research Awards Annual Research Meeting: Brandon Mercado Poster Presentation at 2012 EERE Annual Research Meeting, Postdoctoral Research Awards, from...

  8. Postdoctoral Research Awards Annual Research Meeting: Padmaja...

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

    Padmaja Gunda Postdoctoral Research Awards Annual Research Meeting: Padmaja Gunda Poster Presentation at 2012 EERE Annual Research Meeting, Postdoctoral Research Awards, from the...

  9. GREAT LAKES ENVIRONMENTAL RESEARCH LABORATORY

    E-Print Network [OSTI]

    generation. Studiesof the lakes' physics i m p m understandingand predictionof the circulation, the thermal; numericalforecasttools result in productsapplicable to pollution transportand dispersion. Researchon physical phenomena

  10. RESEARCH PROJECTS A Basic research

    E-Print Network [OSTI]

    25 7 RESEARCH PROJECTS A Basic research SOFT SENSOR METHODS TO IMPROVE COMPETENCE OF INDUSTRIAL, Oulu University Duration of the project: 2000-2004 The aim is to improve the competence of industrial. #12;26 B Energy and process automation INTERACTION BETWEEN WOOD AND DEFIBRATION MEDIA IN GRINDING

  11. Research Help

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAboutNuclearPrincipalResearchResearchResearch

  12. Development of a circulating zinc-bromine battery. Phase I. Final report

    SciTech Connect (OSTI)

    Bellows, R.; Einstein, H.; Grimes, P.; Kantner, E.; Malachesky, P.; Newby, K.; Tsien, H.

    1983-01-01

    This report summarizes Phase I of a three phase program aimed at developing Exxon's circulating zinc-bromine battery for photovoltaic energy storage. Previous work at Exxon had developed a basic zinc-bromine system approach. This approach incorporates carbon plastic electrodes in a bipolar stack design, a circulating electrolyte with separable bromine complexes, and shunt current protection. Phase I was highlighted by the successful scale-up and demonstration of 3 and 10 kWh submodules. Two smaller demonstration batteries were delivered to Sandia for testing. Important technology improvements were demonstrated concerning shunt current protection, improved performance of low cost microporous separators, and insert injection molding of electrodes and separators. Base technology was expanded via an increased parametric testing program, materials testing and electrolyte studies. Production cost estimates were revised based on improved design concepts to project direct factory costs of $28/kWh (1980$) for large scale production of 20 kWh modules. A potential developmental plan was drafted, delineating critical development milestones. The project effort is continuing to show steady progress toward developing a deliverable 20 kWh photovoltaic battery for the completion of Phase III in 1983.

  13. Development of a circulating zinc-bromine battery, Phase II. Final report

    SciTech Connect (OSTI)

    Bellows, R.; Einstein, H.; Grimes, P.; Kantner, E.; Malachesky, P.; Newby, K.; Tsien, H.; Young, A.

    1983-10-01

    This report summarizes Phase II of a multi-phase program aimed at developing Exxon's circulating zinc-bromine battery into an advanced energy storage system. Previous work at Exxon had developed a basic zinc-bromine battery system approach. This approach utilizes carbon-plastic electrodes in a bipolar stack design, a circulating electrolyte with separable bromine complexes, and shunt current protection. Phase II was highlighted by the successful scale-up and demonstration of a 20 kWh zinc-bromine battery module. Important technology improvements were demonstrated in the areas of extended life cycling, low cost stack technology, high power/high efficiency supported electrolytes, and system auxiliaries. The basic technology was augmented via increases in parametric testing, materials testing, and electrolyte studies. Production cost estimates from Phase I ($28/kWh in 1980$) were projected to an OEM price of $37/kWh using the A.D. Little costing method. A revised cost analysis, using an approach in which all battery components are produced at the battery manufacturing facility (as compared to the original analysis based on purchase of cell components from plastics fabricators) showed essentially the same factory costs as the original estimate (approx. $28/kWh). A design has been developed for a prototype 20 kWh energy storage system which will be delivered to Sandia National laboratories in 1983 near the completion of Phase III. Project effort is continuing to show steady progress toward the attainment of this goal.

  14. Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion System

    SciTech Connect (OSTI)

    Wei-Ping Pan; Songgeng Li; John T. Riley

    2005-10-01

    This report is to present the progress made on the project ''Establishment of an Environmental Control Technology Laboratory (ECTL) with a Circulating Fluidized-Bed Combustion (CFBC) System'' during the period July 1, 2005 through September 30, 2005. The following tasks have been completed. First, the construction of the Circulating Fluidized-Bed (CFB) Combustor Building was completed. The experimental facilities have been moved into the CFB Combustor Building. Second, the fabrication and manufacture of the CFBC Facility is in the final stage and is expected to be completed before November 30, 2005. Third, the drop tube reactor has been remodeled and installed to meet the specific requirements for the investigation of the effects of flue gas composition on mercury oxidation. This study will start in the next quarter. Fourth, the effect of sulfur dioxide on molecular chlorine via the Deacon reaction was investigated. The experimental results from this study are presented in this report. Finally, the proposed work for the next quarter is described in this report.

  15. Simulation of NOx emission in circulating fluidized beds burning low-grade fuels

    SciTech Connect (OSTI)

    Afsin Gungor

    2009-05-15

    Nitrogen oxides are a major environmental pollutant resulting from combustion. This paper presents a modeling study of pollutant NOx emission resulting from low-grade fuel combustion in a circulating fluidized bed. The simulation model accounts for the axial and radial distribution of NOx emission in a circulating fluidized bed (CFB). The model results are compared with and validated against experimental data both for small-size and industrial-size CFBs that use different types of low-grade fuels given in the literature. The present study proves that CFB combustion demonstrated by both experimental data and model predictions produces low and acceptable levels of NOx emissions resulting from the combustion of low-grade fuels. Developed model can also investigate the effects of different operational parameters on overall NOx emission. As a result of this investigation, both experimental data and model predictions show that NOx emission increases with the bed temperature but decreases with excess air if other parameters are kept unchanged. 37 refs., 5 figs., 5 tabs.

  16. Brain insulin lowers circulating BCAA levels by inducing hepatic BCAA catabolism

    SciTech Connect (OSTI)

    Shin, Andrew C.; Fasshauer, Martin; Filatova, Nika; Grundell, Linus A.; Zielinski, Elizabeth; Zhou, Jianying; Scherer, Thomas; Lindtner, Claudia; White, Phillip J.; Lapworth, Amanda L.; Llkayeva, Olka; Knippschild, Uwe; Wolf, Anna M.; Scheja, Ludger; Grove, Kevin L.; Smith, Richard D.; Qian, Weijun; Lynch, Christopher J.; Newgard, Christopher B.; Buettner, Christoph

    2014-11-04

    Circulating branched-chain amino acid (BCAA) levels are elevated in obesity and diabetes and are a sensitive predictor for type 2 diabetes. Here we show in rats that insulin dose-dependently lowers plasma BCAA levels through induction of protein expression and activity of branched-chain alpha keto-acid dehydrogenase (BCKDH), the rate-limiting enzyme in the BCAA degradation pathway in the liver. Selective induction of hypothalamic insulin signaling in rats as well as inducible and lifelong genetic modulation of brain insulin receptor expression in mice both demonstrate that brain insulin signaling is a major regulator of BCAA metabolism by inducing hepatic BCKDH. Further, short-term overfeeding impairs the ability of brain insulin to lower circulating BCAA levels in rats. Chronic high-fat feeding in primates and obesity and/or type 2 diabetes in humans is associated with reduced BCKDH protein expression in liver, further supporting the concept that decreased hepatic BCKDH is a primary cause of increased plasma BCAA levels in insulin-resistant states. These findings demonstrate that neuroendocrine pathways control BCAA homeostasis and that hypothalamic insulin resistance can be a cause of impaired BCAA metabolism in obesity and diabetes.

  17. DETECTION OF EQUATORWARD MERIDIONAL FLOW AND EVIDENCE OF DOUBLE-CELL MERIDIONAL CIRCULATION INSIDE THE SUN

    SciTech Connect (OSTI)

    Zhao Junwei; Bogart, R. S.; Kosovichev, A. G.; Hartlep, Thomas; Duvall, T. L. Jr.

    2013-09-10

    Meridional flow in the solar interior plays an important role in redistributing angular momentum and transporting magnetic flux inside the Sun. Although it has long been recognized that the meridional flow is predominantly poleward at the Sun's surface and in its shallow interior, the location of the equatorward return flow and the meridional flow profile in the deeper interior remain unclear. Using the first 2 yr of continuous helioseismology observations from the Solar Dynamics Observatory/Helioseismic Magnetic Imager, we analyze travel times of acoustic waves that propagate through different depths of the solar interior carrying information about the solar interior dynamics. After removing a systematic center-to-limb effect in the helioseismic measurements and performing inversions for flow speed, we find that the poleward meridional flow of a speed of 15 m s{sup -1} extends in depth from the photosphere to about 0.91 R{sub Sun }. An equatorward flow of a speed of 10 m s{sup -1} is found between 0.82 and 0.91 R{sub Sun} in the middle of the convection zone. Our analysis also shows evidence of that the meridional flow turns poleward again below 0.82 R{sub Sun }, indicating an existence of a second meridional circulation cell below the shallower one. This double-cell meridional circulation profile with an equatorward flow shallower than previously thought suggests a rethinking of how magnetic field is generated and redistributed inside the Sun.

  18. Design and the Interpretation of Psychological Research Psychology 530

    E-Print Network [OSTI]

    Hopfinger, Joseph B.

    Design and the Interpretation of Psychological Research Psychology 530 A.T. Panter General Description This course covers both theory and applied methods in psychological research, and in particular psychological research (both one's own research and the research of others). Prerequisites There are two

  19. Caterpillar Research

    Broader source: Energy.gov [DOE]

    Presentation given at the 2007 Diesel Engine-Efficiency & Emissions Research Conference (DEER 2007). 13-16 August, 2007, Detroit, Michigan. Sponsored by the U.S. Department of Energy's (DOE) Office of FreedomCAR and Vehicle Technologies (OFCVT).

  20. UGA DESIGN & CONSTRUCTION SUPPLEMENTAL GENERAL REQUIREMENTS & STANDARDS GENERAL THERMAL & MOISTURE PROTECTION REQUIREMENTS ROOF DRAINS & ROOFS

    E-Print Network [OSTI]

    Arnold, Jonathan

    UGA DESIGN & CONSTRUCTION SUPPLEMENTAL GENERAL REQUIREMENTS & STANDARDS GENERAL THERMAL & MOISTURE. ii. General #12;UGA DESIGN & CONSTRUCTION SUPPLEMENTAL GENERAL REQUIREMENTS & STANDARDS GENERAL

  1. One: Microphysics of frost metamorphism: Applications to Triton and Mars. Two: A global analysis of the ozone deficit in the upper stratosphere and lower mesosphere. Three: The diabatic circulation in the stratosphere as diagnosed from Microwave Limb Sounder data

    SciTech Connect (OSTI)

    Eluszkiewicz, J.B.

    1993-01-01

    The present thesis is devoted to two broad subjects, planetary frost metamorphism and the terrestrial middle atmosphere, and consists of three papers. Paper 1 considers frost metamorphism on the surfaces of Triton and Mars. Based on an analysis of the microphysical processes involved in the pressureless sintering, it is concluded that fine-grained nitrogen and carbon dioxide frosts can undergo seasonal metamorphism into semitransparent layers on the surface of Triton and in the Martian seasonal polar caps, respectively. The presence of such layers explains a host of facts about Triton's surface and about the Martian seasonal caps. Paper 2 is devoted to elucidating a long-standing issue in the terrestrial middle atmosphere chemistry, the so-called 'ozone deficit problem.' Based on an analysis of data acquired by the Limb Infrared Monitor of the Stratosphere (LIMS) instrument between October 1978 and May 1979, it is concluded that current photochemical models systematically underestimate observed ozone abundances in the upper stratosphere and lower mesosphere. Three modifications to the accepted photochemical scheme, capable of providing a global solution to this problem, are proposed and discussed. Paper 3 differs from the other two in that it reports on results from an ongoing research effort. It considers the diabatic circulation in the stratosphere and lower mesosphere, using ozone and temperature measurements acquired by the Microwave Limb Sounder (MLS) instrument onboard the Upper Atmosphere Research Satellite (UARS). The present study extends past analyses of the diabatic circulation by considering a full annual cycle, November 1991-November 1992, and by taking advantage of the high vertical resolution of MLS data. In the tropical upper stratosphere and lower mesosphere, a semiannual oscillation (SAO) is observed in the computed circulation, with the region of downwelling reaching maximum spatial extent approximately 1 month before the equinox.

  2. A. Our Research Excellence 4. Research Funding

    E-Print Network [OSTI]

    Zandstra, Peter W.

    A. Our Research Excellence 4. Research Funding Figure f University of Toronto Performance Indicators 2012 Research Funding from Industrial Sources Performance Relevance: The amount of research relationship between the university research community and the private sector. This partnership between

  3. Research Opportunities

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen Generation |Publications TheGashomeResearchResearch Mission

  4. Research Techniques

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen Generation |Publications TheGashomeResearchResearchIn

  5. Research Tools

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen Generation |Publications TheGashomeResearchResearchInSoftware

  6. Research | NREL

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefieldSulfateSciTechtail.Theory ofDid youOxygen Generation |Publications| Blandine JeromeResearchResearch

  7. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 WinnersAffiliates Research Affiliates Yan Mei Wang Yan MeiResearch

  8. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 WinnersAffiliates Research Affiliates Yan Mei Wang Yan MeiResearchFog and

  9. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 WinnersAffiliates Research Affiliates Yan Mei Wang Yan MeiResearchFog

  10. Research Highlight

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMassR&D100 WinnersAffiliates Research Affiliates Yan Mei Wang Yan MeiResearchFogThe

  11. Research Gallery

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAboutNuclearPrincipalResearchResearch Finds

  12. Research Groups

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservation of Fe(II) by Carbon-RichProtonAboutNuclearPrincipalResearchResearch

  13. Digestive System general organization throughout

    E-Print Network [OSTI]

    Houde, Peter

    Digestive System general organization throughout: mucosa, submucosa, muscularis externa, serosa digestive glands salivary pancreas liver (lobes: right, left, caudate, quadrate, diaphragmatic surface, bare

  14. II. GENERAL COMPLIANCE SUPPLEMENT INTRODUCTION

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

    and Suggested Audit Procedures At the end of this General Compliance Supplement is a matrix that outlines the compliance requirements, including special tests and provisions,...

  15. CPFFS Exhibit A General Conditions

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

    General Conditions Page 29 of 33 (3) A least developed country (Afghanistan, Angola, Bangladesh, Benin, Bhutan, Burkina Faso, Burundi, Cambodia, Central African Republic, Chad,...

  16. Analysis of ammonium sulfate circulation tank failure -- Possible causes and their remediation

    SciTech Connect (OSTI)

    O`Hearn, R.J. [Acme Steel, Chicago, IL (United States)

    1997-12-31

    Acme steel manufactures a liquid solution of ammonium sulphate by scrubbing the coke oven gas with a dilute solution of sulphuric acid. When the bath reaches a predetermined specific gravity, it is isolated from the system, neutralized with aqua ammonia, pumped to the shipping tanks, re-charged with water and acid, then placed back in service. To improve the ammonia removal efficiency, three circulation tanks are used in this system. In June 1996, the volume of two of the sulfate solution tanks in the ammonia removal plant were increased by two different pressure events. The first tank was damaged by pressure that was not relieved due to a plugged vent line. The second tank was damaged by a pressure event generated during the process of making ammonium sulfate. This paper will discuss the cause of the second tank`s failure, and the design solution to restart the operation of the plant.

  17. Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion System

    SciTech Connect (OSTI)

    Wei-Ping Pan; Zhongxian Cheng; Yan Cao; John Smith

    2006-09-30

    This report is to present the progress made on the project entitled ''Establishment of an Environmental Control Technology Laboratory (ECTL) with a Circulating Fluidized-Bed Combustion (CFBC) System'' during the period July 1, 2006 through September 30, 2006. The following activities have been completed: the steel floor grating around the riser in all levels and the three-phase power supply for CFBC System was installed. Erection of downcomers, loop seals, ash bunker, thermal expansion joints, fuel and bed material bunkers with load cells, rotary air-lock valves and fuel flow monitors is underway. Pilot-scale slipstream tests conducted with bromine compound addition were performed for two typical types of coal. The purposes of the tests were to study the effect of bromine addition on mercury oxidization. From the test results, it was observed that there was a strong oxidization effect for Powder River Basin (PRB) coal. The proposed work for next quarter and project schedule are also described.

  18. MFIX simulation of NETL/PSRI challenge problem of circulating fluidized bed

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

    Li, Tingwen; Dietiker, Jean-François; Shahnam, Mehrdad

    2012-12-01

    In this paper, numerical simulations of NETL/PSRI challenge problem of circulating fluidized bed (CFB) using the open-source code Multiphase Flow with Interphase eXchange (MFIX) are reported. Two rounds of simulation results are reported including the first-round blind test and the second-round modeling refinement. Three-dimensional high fidelity simulations are conducted to model a 12-inch diameter pilot-scale CFB riser. Detailed comparisons between numerical results and experimental data are made with respect to axial pressure gradient profile, radial profiles of solids velocity and solids mass flux along different radial directions at various elevations for operating conditions covering different fluidization regimes. Overall, the numericalmore »results show that CFD can predict the complex gas–solids flow behavior in the CFB riser reasonably well. In addition, lessons learnt from modeling this challenge problem are presented.« less

  19. Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion System

    SciTech Connect (OSTI)

    Wei-Ping Pan; Songgeng Li

    2006-01-01

    This report is to present the progress made on the project ''Establishment of an Environmental Control Technology Laboratory (ECTL) with a Circulating Fluidized-Bed Combustion (CFBC) System'' during the period October 1, 2005 through December 31, 2005. Work was performed on the following activities. First, the fabrication and manufacture of the CFBC Facility is nearly completed. The erection of the CFBC facility is expected to start in the second week of February, 2006. Second, effect of flue gas components on mercury oxidation was investigated in a drop tube reactor. As a first step, experiment for mercury oxidation by chlorine was investigated. The experimental results from this study are presented in this report. Finally, the proposed work for the next quarter is described in this report.

  20. ESTABLISHMENT OF AN ENVIRONMENTAL CONTROL TECHNOLOGY LABORATORY WITH A CIRCULATING FLUIDIZED-BED COMBUSTION SYSTEM

    SciTech Connect (OSTI)

    Wei-Ping Pan; Kunlei Liu; John T. Riley

    2004-01-01

    The purpose of this report is to summarize the progress made on the project ''Establishment of an Environmental Control Technology Laboratory with a Circulating Fluidized-Bed Combustion (CFBC) System'' in this quarter (September-December of 2003). The main tasks in this quarter consisted of the following four parts. First, all documents for managing this project have been prepared and sent to the Office of Project Management at the US Department of Energy's (DOE's) National Energy Technology Laboratory (NETL). Second, plans for the renovation of space for a new combustion laboratory for the CFBC system has progressed smoothly. Third, considerable progress in the design of the CFBC system has been made. Finally, a lab-scale simulated fluidized-bed combustion facility has been set up in order to make some fundamental investigations of the co-firing of coal with waste materials in the next quarter. Proposed work for the next quarter has been outlined in this report.

  1. MFIX simulation of NETL/PSRI challenge problem of circulating fluidized bed

    SciTech Connect (OSTI)

    Li, Tingwen; Dietiker, Jean-François; Shahnam, Mehrdad

    2012-12-01

    In this paper, numerical simulations of NETL/PSRI challenge problem of circulating fluidized bed (CFB) using the open-source code Multiphase Flow with Interphase eXchange (MFIX) are reported. Two rounds of simulation results are reported including the first-round blind test and the second-round modeling refinement. Three-dimensional high fidelity simulations are conducted to model a 12-inch diameter pilot-scale CFB riser. Detailed comparisons between numerical results and experimental data are made with respect to axial pressure gradient profile, radial profiles of solids velocity and solids mass flux along different radial directions at various elevations for operating conditions covering different fluidization regimes. Overall, the numerical results show that CFD can predict the complex gas–solids flow behavior in the CFB riser reasonably well. In addition, lessons learnt from modeling this challenge problem are presented.

  2. Guest Researcher Location Gaithersburg Boulder

    E-Print Network [OSTI]

    . RELEVANT RECORDS OF THE DOMESTIC GUEST RESEARCHER RECORD SYSTEM MAY, AS A MATTER OF ROUTINE USE FOR INVESTIGATING OR PROSECUTING CONTRACTS, CRIMINAL, CIVIL ORREGULATORY VIOLATIONS; MAINTAINING ENFORCEMENT OF A CONTRACT; OR (D) THE GENERAL SERVICES ADMINISTRATOR, OR HIS DESIGNEE, DURING AN INSPECTION OF RECORDS

  3. Call for Research Proposals January 23, 2015

    E-Print Network [OSTI]

    Subramanian, Venkat

    are sought under the following general guidelines. Example Research Activities: 1. Energy Efficiency 2. Solar Energy Processes and Photoactive Materials 3. Carbon Neutral Energy Production and Processing 4. Metabolic Engineering, Bioprocessing 5. Ecosystems and Earth Systems Science 6. Sustainable Development

  4. On the correlation between ice water content and ice crystal size and its application to radiative transfer and general circulation models

    E-Print Network [OSTI]

    Liou, K. N.

    On the correlation between ice water content and ice crystal size and its application to radiative analysis involving ice water content (IWC) and mean effective ice crystal size (De) intended, K. N., Y. Gu, Q. Yue, and G. McFarguhar (2008), On the correlation between ice water content and ice

  5. NASA's new modeling framework for integrating cloud processes explicitly within each grid column of a general circulation model can improve realism over the conventional model that

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    NASA's new modeling framework for integrating cloud processes explicitly within each grid column, AND SIMPSON--Laboratory for Atmospheres, NASA Goddard Space Flight Center, Greenbelt, Maryland; CHERN--Laboratory for Atmospheres, NASA Goddard Space Flight Center, Greenbelt, and Goddard Earth Sciences and Technology Center

  6. GFDL ARM Project Technical Report: Using ARM Observations to Evaluate Cloud and Convection Parameterizations & Cloud-Convection-Radiation Interactions in the GFDL Atmospheric General Circulation Model

    SciTech Connect (OSTI)

    V. Ramaswamy; L. J. Donner; J-C. Golaz; S. A. Klein

    2010-06-17

    This report briefly summarizes the progress made by ARM postdoctoral fellow, Yanluan Lin, at GFDL during the period from October 2008 to present. Several ARM datasets have been used for GFDL model evaluation, understanding, and improvement. This includes a new ice fall speed parameterization with riming impact and its test in GFDL AM3, evaluation of model cloud and radiation diurnal and seasonal variation using ARM CMBE data, model ice water content evaluation using ARM cirrus data, and coordination of the TWPICE global model intercomparison. The work illustrates the potential and importance of ARM data for GCM evaluation, understanding, and ultimately, improvement of GCM cloud and radiation parameterizations. Future work includes evaluation and improvement of the new dynamicsPDF cloud scheme and aerosol activation in the GFDL model.

  7. Studies of Ocean Predictability at Decade to Century Time Scales Using a Global Ocean General Circulation Model in a Parallel Computing Environment

    SciTech Connect (OSTI)

    Barnett, T.P.

    1998-11-30

    The objectives of this report are to determine the structure of oceanic natural variability at time scales of decades to centuries, characterize the physical mechanisms responsible for the variability; determine the relative importance of heat, fresh water, and moment fluxes on the variability; determine the predictability of the variability on these times scales. (B204)

  8. Precipitation over South America during the Last Glacial Maximum: An analysis of the "amount effect" with a water isotope-enabled general circulation model

    E-Print Network [OSTI]

    Lee, Jung-Eun; Johnson, Kathleen; Fung, Inez

    2009-01-01

    Modeling d 18 O in precipitation over the tropical Americas:2007), Millennial-scale precipitation changes in southernStable isotopes in precipitation, Tellus, 16, 436 – Fedorov,

  9. Deep-Sea Research I 53 (2006) 17181728 A North Atlantic deep-water eddy in the

    E-Print Network [OSTI]

    Miami, University of

    2006-01-01

    Deep-Sea Research I 53 (2006) 1718­1728 A North Atlantic deep-water eddy in the Agulhas Current the deep waters, pinching off an eddy, which later detached from the slope current and was carried. Keywords: Circulation; Indian Ocean; Boundary currents; Agulhas Current; Deep water; Oceanic eddies 1

  10. Research Councils UK Research funded by the

    E-Print Network [OSTI]

    Crowther, Paul

    Research Councils UK RCUK and big data #12;Research funded by the Research Councils makes a vital innovation and deliver impact from research, including the development of collaborative research programmes, investment in major research capabilities, such as national research facilities, and the support of impact

  11. YORK RESEARCH Principles Guiding Research at York & Strategic Research Plan

    E-Print Network [OSTI]

    YORK RESEARCH Principles Guiding Research at York & Strategic Research Plan (Approved at Senate, June 2001) The Senate Committee on Research recommends and APPC concurs that Senate approve the following principles guiding research, which are intended to underpin the Strategic Research Plan for York

  12. DEPARTMENT OF PHYSICS General Syllabus

    E-Print Network [OSTI]

    Brinkmann, Peter

    DEPARTMENT OF PHYSICS General Syllabus Physics 20700 General Physics Designation: Elective./Sem. Prerequisites: Pre- or coreq.: Math 20200 for Physics 20700. (Required for all students in the Physical Sciences, Engineering and Computer Science.) Textbook and other suggested material: "Fundamentals of Physics 9th Edition

  13. Florida State University General Bulletin

    E-Print Network [OSTI]

    Ronquist, Fredrik

    Florida State University 2010-2011 General Bulletin Graduate Edition #12;Statement of Publication Fall 2010 (Volume CV, No. 2). The Florida State University Graduate Edition of the General Bulletin and numerous eminent scholars in many areas of the arts and sciences, our academic programs continue to receive

  14. On the generalized continuity equation

    E-Print Network [OSTI]

    Arbab I. Arbab; Hisham. M. Widatallah

    2010-02-27

    A generalized continuity equation extending the ordinary continuity equation has been found using quanternions. It is shown to be compatible with Dirac, Schrodinger, Klein-Gordon and diffusion equations. This generalized equation is Lorentz invariant. The transport properties of electrons are found to be governed by Schrodinger-like equation and not by the diffusion equation.

  15. Computational plasma physics Plasma physics is blossoming and flourishing. It is a very fertile research area, from both a scientific and technological

    E-Print Network [OSTI]

    Ebert, Ute

    , in general, computational plasma physics is a powerful alternative for experimental plasma research

  16. SYMPOSIUM DE GENIE ELECTRIQUE (SGE'14) : EF-EPF-MGE 2014, 8-10 JUILLET 2014, ENS CACHAN, FRANCE Intgration d'une batterie circulation pour lisser la

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . Cet article propose d'utiliser une batterie à circulation ou « flow battery » pour faciliter la'énergie (ESS) ont été étudiés pour être associés à une hydrolienne dans [6]. La technologie de type « flow » batterie (batterie à circulation d'électrolyte) apparaît très appropriée pour le stockage de l

  17. Raman and far ir spectroscopic study of quaternary ammonium polybromide fused salt phases for zinc bromine circulating electrolyte batteries

    SciTech Connect (OSTI)

    Larrabee, J.A.; Graf, K.R.; Grimes, P.G.

    1985-01-01

    The circulating electrolyte zinc bromine battery is an attractive advanced battery system. The electrolyte is a solution of zinc bromide, quaternary ammonium bromides for bromine complexation and added salts to enhance properties. Laser Raman spectroscopy and far infrared spectroscopy were used to characterize the liquid quaternary ammonium polybromide fused salt phases.

  18. On the Patterns of Wind-Power Input to the Ocean Circulation FABIEN ROQUET AND CARL WUNSCH

    E-Print Network [OSTI]

    Wunsch, Carl

    On the Patterns of Wind-Power Input to the Ocean Circulation FABIEN ROQUET AND CARL WUNSCH received 1 February 2011, in final form 12 July 2011) ABSTRACT Pathways of wind-power input into the ocean pumping, with a pattern determined by the wind curl rather than the wind itself. Regions of power

  19. Project Profile Medical Cell BioPhysics Circulating Tumor Cells Sanne de Wit: s.dewit@utwente.nl

    E-Print Network [OSTI]

    Twente, Universiteit

    by Islam et al. to prepare full length barcoded cDNA from single cells in a single step. This assignmentProject Profile Medical Cell BioPhysics ­ Circulating Tumor Cells Contact: Sanne de Wit: s.dewit@utwente.nl Visit us: Carré 4.435 Catching metastasizing cells in the act Novel characterization methods

  20. Multifractal Analysis of Chaotic Flashing-Induced Instabilities in Boiling Channels in the Natural-Circulation CIRCUS Facility

    E-Print Network [OSTI]

    Demazière, Christophe

    . INTRODUCTION Instability of forced-circulation boiling water reac- tors ~BWRs!, which is manifested by selfMultifractal Analysis of Chaotic Flashing-Induced Instabilities in Boiling Channels in the Natural University of Technology, Department of Physics of Nuclear Reactors, Delft, 2629 BJ, The Netherlands Received