Sample records for dc metropolitan area

  1. Metropolitan area network support at Fermilab

    SciTech Connect (OSTI)

    DeMar, Phil; Andrews, Chuck; Bobyshev, Andrey; Crawford, Matt; Colon, Orlando; Fry, Steve; Grigaliunas, Vyto; Lamore, Donna; Petravick, Don; /Fermilab

    2007-09-01T23:59:59.000Z

    Advances in wide area network service offerings, coupled with comparable developments in local area network technology have enabled many research sites to keep their offsite network bandwidth ahead of demand. For most sites, the more difficult and costly aspect of increasing wide area network capacity is the local loop, which connects the facility LAN to the wide area service provider(s). Fermilab, in coordination with neighboring Argonne National Laboratory, has chosen to provide its own local loop access through leasing of dark fiber to nearby network exchange points, and procuring dense wave division multiplexing (DWDM) equipment to provide data channels across those fibers. Installing and managing such optical network infrastructure has broadened the Laboratory's network support responsibilities to include operating network equipment that is located off-site, and is technically much different than classic LAN network equipment. Effectively, the Laboratory has assumed the role of a local service provider. This paper will cover Fermilab's experiences with deploying and supporting a Metropolitan Area Network (MAN) infrastructure to satisfy its offsite networking needs. The benefits and drawbacks of providing and supporting such a service will be discussed.

  2. american metropolitan areas: Topics by E-print Network

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

    all-to-all traffic and regular ... Guan, Kyle C. 11 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  3. avoiding metropolitan areas: Topics by E-print Network

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

    all-to-all traffic and regular ... Guan, Kyle C. 10 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  4. atlanta metropolitan area: Topics by E-print Network

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

    all-to-all traffic and regular ... Guan, Kyle C. 10 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  5. New Orleans Urbanized Area Metropolitan Transportation Plan FY 2032

    E-Print Network [OSTI]

    New Orleans Urbanized Area Regional Planning Commission

    2007-06-12T23:59:59.000Z

    which are more economical or which have less environmental eff ects while achieving similar transportation objectives. Burgeoning corridors such as the corridor between the Louis Armstrong International Airport and the Central Business District...2 0 23 F Y Metropolitan Transportation Plan New Orleans Urbanized AreaNew Regional Planning Commission Jefferson, Orleans Plaquemines, St. Bernard and St. Tammany Parishes, Louisiana June 12, 2007 Metropolitan Transportation Plan New Orleans...

  6. METROPOLITAN REPORT Economic Indicators for the New Orleans Area

    E-Print Network [OSTI]

    Kulp, Mark

    gained. Growth, while continuing, has slowed. · Construction, driven by recovery activity, is stronger or July 2007. Employment data at the metropolitan level under- went an enormous revision by the Louisiana

  7. Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area

    E-Print Network [OSTI]

    Lei, Wenfang

    Formaldehyde (HCHO) is a radical source that plays an important role in urban atmospheric chemistry and ozone formation. The Mexico City Metropolitan Area (MCMA) is characterized by high anthropogenic emissions of HCHO ...

  8. Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    and dispersion of a Mexico City pollution out- flow eventon air pollution in the Mexico City Metropolitan Area,pollution transport during the MILAGRO-2006 campaign: a case study of a major Mexico

  9. The Transportation Energy and Carbon Footprints of the 100 Largest U.S. Metropolitan Areas

    SciTech Connect (OSTI)

    Southworth, Frank [ORNL; Sonnenberg, Anthon [Georgia Institute of Technology; Brown, Marilyn A [ORNL

    2008-01-01T23:59:59.000Z

    We present estimates of the automobile and truck travel based energy and carbon footprints of the largest 100 U.S. metropolitan areas. The footprints are based on the estimated vehicle miles traveled and the transportation fuels consumed. Results are presented on an annual basis and represent end use emissions only. Total carbon emissions, emissions per capita, and emissions per dollar of gross metropolitan product are reported. Two years of annual data were examined, 2000 and 2005, with most of the in-depth analysis focused on the 2005 results. In section 2 we provide background data on the national picture and derive some carbon and energy consumption figures for the nation as a whole. In section 3 of the paper we examine the metropolitan area-wide results based on the sums and averages across all 100 metro areas, and compare these with the national totals and averages. In section 4 we present metropolitan area specific footprints and examine the considerable variation that is found to exist across individual metro areas. In doing so we pay particular attention to the effects that urban form might have on these differences. Finally, section 5 provides a summary of major findings, and a list of caveats that need to be borne in mind when using the results due to known limitations in the data sources used.

  10. Conservation justice in metropolitan Cape Town: A study at the Macassar Dunes Conservation Area

    E-Print Network [OSTI]

    Silander Jr., John A.

    Stakeholder analysis a b s t r a c t Conservation justice, a concept analogous to environmental justiceConservation justice in metropolitan Cape Town: A study at the Macassar Dunes Conservation Area J xxxx Keywords: Conservation justice Community-based conservation South Africa Urban conservation

  11. If you reside in WASHINGTON, DC - MD -VA - WV your salary will...

    National Nuclear Security Administration (NNSA)

    If you are employed in the WASHINGTON, DC Metropolitan Area (D.C., Baltimore, Northern VA, Eastern WV, and Southern PA) your salary will range from: Pay Band Pay Plan(s) Minimum...

  12. Planning for mitigating climate change risk to metropolitan areas (USA)

    E-Print Network [OSTI]

    Grover, Himanshu

    2009-06-02T23:59:59.000Z

    In the last couple of decades, there has been increasing evidence of changes in global climate. With urban areas identified as the primary contributors to the climate change, there is an impetus for initiatives to persuade major contributors...

  13. Planning for mitigating climate change risk to metropolitan areas (USA) 

    E-Print Network [OSTI]

    Grover, Himanshu

    2009-06-02T23:59:59.000Z

    In the last couple of decades, there has been increasing evidence of changes in global climate. With urban areas identified as the primary contributors to the climate change, there is an impetus for initiatives to persuade major contributors...

  14. Modeling urban growth and land use/land cover change in the Houston Metropolitan Area from 2002 - 2030

    E-Print Network [OSTI]

    Oguz, Hakan

    2005-08-29T23:59:59.000Z

    spatially explicit cellular automata model, to simulate future (2002-2030) urban growth in the Houston metropolitan area, one of the fastest growing metropolises in the United States during the past decades. The model is calibrated with historical data...

  15. The case for pension plan and university endowment equity investment in brownfields in the urban core of major metropolitan areas

    E-Print Network [OSTI]

    Larsen, Tamara C. (Tamara Candace), 1977-

    2003-01-01T23:59:59.000Z

    The purpose of this thesis is to present a case for institutional equity investment in brownfields in the urban core of major metropolitan areas. Pension plans and university endowments are the primary institutional investors ...

  16. In situ measurements of speciated atmospheric mercury and the identification of source regions in the Mexico City Metropolitan Area

    E-Print Network [OSTI]

    Rutter, A. P.

    In order to expand the currently limited understanding of atmospheric mercury source-receptor relationships in the Mexico City Metropolitan Area, real time measurements of atmospheric mercury were made at a downtown urban ...

  17. Tulsa Metropolitan Area Destination 2030 Long Range Transportation Plan

    E-Print Network [OSTI]

    Indian Nations Council of Governments

    OP 151 OP 20 tu 64 ??? 44 ??? 244 ??? 44 ??? 44 tu 75 tu 412 tu 75A tu 169 tu 64 Cherokee Industrial Park Tulsa Airport Area 21st & Utica Corridor BA Expressway & US 169 Corridor South Yale Corridor Port of Catoosa 116th 106th 126th Pine 36th 146th... International Airport Port of Catoosa Johnston's Port 33 116th 106th 126th Pine 36th 146th 166th 56th Uni o n 46th 171st Y a l e 3 3 r d W 161st P e o r i a M i n g o 1 2 9 t h W E l w o o d Apache 1 2 9 t h Admiral 151st 8 1 s t W L e w i s G a r n e t t 9 7...

  18. A comprehensive study of Superfund program benefits in the Denver and Tampa Bay metropolitan areas

    SciTech Connect (OSTI)

    Held, K.; Casper, B.; Siddhanti, S.K. [Booz Allen and Hamilton, Inc., McLean, VA (United States); Smith, E.R. [Environmental Protection Agency, Washington, DC (United States)

    1995-12-31T23:59:59.000Z

    The purpose of the study is to evaluate the benefits of the Superfund program in selected geographic areas. The study demonstrates how the cleanup of Superfund sites has improved the overall quality of life of those in the affected communities. The study presents findings on the benefits of Superfund cleanup activity in the Denver, Colorado and Tampa Bay, Florida metropolitan areas. Denver and Tampa Bay were chosen from several areas that the EPA evaluated and screened during the initial phase of the study. These locations were chosen because of a substantial presence of Superfund activities, making it possible to assess the efficacy of the program. Several features make this study unique in terms of its overall goal. The study examines a broad range of benefit categories related to human health, environmental, and socioeconomic effects of Superfund cleanup activities. The study is also designed to assess benefits due to completed, current, and future planned activity at Superfund sites. This assessment covers Federal remedial activities at National Priorities List (NPL) sites, as well as relevant Federal removal actions in the study areas. These benefits are investigated from an area-wide perspective, as opposed to site-by-site, to determine Superfund`s overall effect on the communities in each area. The study consists of two major phases: Phase 1: Screening and ranking 16 prospective geographic areas and selecting Denver and Tampa Bay as the most appropriate areas for in-depth analysis; and Phase 2: Developing methodologies for assessing benefits, collecting relevant data, and analyzing the benefits from Superfund cleanup activity.

  19. The influence of coyotes on an urban Canada goose population in the Chicago metropolitan area

    SciTech Connect (OSTI)

    Brown, Justin L.; /Ohio State U.

    2007-01-01T23:59:59.000Z

    Canada geese (Branta canadensis) have become common in many urban areas, often creating nuisance problems for human residents. The presence of urban geese has raised concerns about the spread of disease, increased erosion, excessive noise, eutrophication of waterways, and general nuisance problems. Goose populations have grown due to an increase in urbanization resulting in an abundance of high quality food (urban grass) and suitable nesting sites, as well as a decrease in some predators. I monitored nest predation in the Chicago suburbs during the 2004 and 2005 nesting seasons using 3 nest monitoring techniques to identify predators: video cameras, plasticine eggs, and sign from nest using a classification tree analysis. Of 58 nests monitored in 2004 and 286 in 2005, only raccoons (Procyon lotor) and coyotes (Canis latrans) were identified as nest predators. Raccoons were responsible for 22-25% of depredated nests, but were rarely capable of depredating nests that were actively defended by a goose. Coyotes were responsible for 75-78% of all Canada goose nest depredation and were documented killing one adult goose and feeding on several others. The coyote is a top-level predator that had increased in many metropolitan areas in recent years. To determine if coyotes were actively hunting geese or eggs during the nesting season, I analyzed coyote habitat selection between nesting and pre-nesting or post-nesting seasons. Coyote home ranges (95% Minimum Convex Polygon) were calculated for 19 coyotes to examine third order habitat selection related to goose nest abundance. A 100 m buffer (buffer habitat) was created and centered on each waterway edge and contained 90% of all nests. Coyotes showed selection for habitats during all seasons. Buffer habitat was the top ranked habitat in both pre-nesting and nesting seasons, but dropped to third ranked in post-nesting season. Habitat selection across seasons was compared using a repeated measures MANOVA. Habitat selection between pre-nesting and nesting seasons (P=0.72) were similar, while between post-nesting and nesting seasons there was a nearly significant difference (P=0.07). The insignificant change in habitat use across seasons suggests that coyotes did not switch habitat use to take advantage of goose nests. Alternatively, the change in ranking of buffer habitat across seasons suggests that coyotes may have switched habitat use to take advantage of goose nests. The results are not clear as large individual variation between coyotes due to differences in habitat availability, and social status interfere with the results of the analysis. Even though I failed to find strong support for coyotes actively hunting goose nests, they nevertheless were the primary nest predator in the area and may influence Canada goose populations. To determine the potential influence of coyotes on the Canada goose population, I created a Canada goose matrix population model that included variables such as coyote predation on adults and nests as well as coyote influence on nest desertion. Using the base population model I calculated the Canada goose population to be increasing with {lambda} = 1.055. The removal of all coyote influence on the goose population would allow {lambda} to increase to 1.214. Nest predation was the most important factor related to coyotes: the removal of coyote nest predation from the model resulted in a population growth rate {lambda} = 1.157. Modeling results suggest coyotes are serving as a limiting factor for the Canada goose population within the Chicago metropolitan area.

  20. Using a Regional Chemical Transport Model for the Analysis of Gaseous and Particulate Air Pollutants in the Mexico City Metropolitan Area

    E-Print Network [OSTI]

    Ali, Sajjad Ghulam

    2012-02-14T23:59:59.000Z

    Air quality in the Mexico City Metropolitan Area (MCMA) is the subject of many studies due to concerns from high emissions and their adverse effects on public health and the environment. In this study, a high resolution simulation is performed...

  1. The value trees contribute to residential property in the Austin metropolitan area: a factor in assessing the impact of oak wilt

    E-Print Network [OSTI]

    Martin, Clay Whitney

    1986-01-01T23:59:59.000Z

    THE VALUE TREES CONTRIBUTE TO RESIDENTIAL PROPERTY IN THE AUSTIN METROPOLITAN AREA: A FACTOR IN ASSESSING THE IMPACT OF OAK WILT A Thesis by CLAY WHITNEY MARTIN Submitted to the Graduate College of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 1986 Major Subject: Forestry THE VALUE TREES CONTRIBUTE TO RESIDENTIAL PROPERTY IN THE AUSTIN METROPOLITAN AREA: A FACTOR IN ASSESSING THE IMPACT OF OAK WILT A Thesis by CLAY WHITNEY MARTIN...

  2. (Draft) Community air pollution and mortality: Analysis of 1980 data from US metropolitan areas

    SciTech Connect (OSTI)

    Lipfert, F.W.

    1992-11-01T23:59:59.000Z

    1980 data from up to 149 metropolitan areas were used to define cross-sectional associations between community air pollution and ``excess`` human mortality. The regression model proposed by Ozkaynak and Thurston (1987), which accounted for age, race, education, poverty, and population density, was evaluated and several new models were developed. The new models also accounted for migration, drinking water hardness, and smoking, and included a more detailed description of race. Cause-of-death categories analyzed include all causes, all ``non-external`` causes, major cardiovascular diseases, and chronic obstructive pulmonary diseases (COPD). Both annual mortality rates and their logarithms were analyzed. Air quality data were obtained from the EPA AIRS database (TSP, SO{sub 4}{sup =}, Mn, and ozone) and from the inhalable particulate network (PM{sub 15}, PM{sub 2.5} and SO{sub 4}{sup =}, for 63{sup 4} locations). The data on particulates were averaged across all monitoring stations available for each SMSA and the TSP data were restricted to the year 1980. The associations between mortality and air pollution were found to be dependent on the socioeconomic factors included in the models, the specific locations included in the data set, and the type of statistical model used. Statistically significant associations were found as follows: between TSP and mortality due to non-external causes with log-linear models, but not with a linear model betweenestimated 10-year average (1980--90) ozone levels and 1980 non-external and cardiovascular deaths; and between TSP and COPD mortality for both linear and log-linear models. When the sulfate contribution to TSP was subtracted, the relationship with COPD mortality was strengthened.

  3. (Draft) Community air pollution and mortality: Analysis of 1980 data from US metropolitan areas

    SciTech Connect (OSTI)

    Lipfert, F.W.

    1992-11-01T23:59:59.000Z

    1980 data from up to 149 metropolitan areas were used to define cross-sectional associations between community air pollution and excess'' human mortality. The regression model proposed by Ozkaynak and Thurston (1987), which accounted for age, race, education, poverty, and population density, was evaluated and several new models were developed. The new models also accounted for migration, drinking water hardness, and smoking, and included a more detailed description of race. Cause-of-death categories analyzed include all causes, all non-external'' causes, major cardiovascular diseases, and chronic obstructive pulmonary diseases (COPD). Both annual mortality rates and their logarithms were analyzed. Air quality data were obtained from the EPA AIRS database (TSP, SO[sub 4][sup =], Mn, and ozone) and from the inhalable particulate network (PM[sub 15], PM[sub 2.5] and SO[sub 4][sup =], for 63[sup 4] locations). The data on particulates were averaged across all monitoring stations available for each SMSA and the TSP data were restricted to the year 1980. The associations between mortality and air pollution were found to be dependent on the socioeconomic factors included in the models, the specific locations included in the data set, and the type of statistical model used. Statistically significant associations were found as follows: between TSP and mortality due to non-external causes with log-linear models, but not with a linear model betweenestimated 10-year average (1980--90) ozone levels and 1980 non-external and cardiovascular deaths; and between TSP and COPD mortality for both linear and log-linear models. When the sulfate contribution to TSP was subtracted, the relationship with COPD mortality was strengthened.

  4. Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area

    SciTech Connect (OSTI)

    Apel, Eric; Emmons, L.; Karl, Thomas G.; Flocke, Frank M.; Hills, A. J.; Madronich, Sasha; Lee-Taylor, J.; Fried, Alan; Weibring, P.; Walega, J.; Richter, Dirk; Tie, X.; Mauldin, L.; Campos, Teresa; Weinheimer, Andrew J.; Knapp, David; Sive, B.; Kleinman, Lawrence I.; Springston, S.; Zaveri, Rahul A.; Ortega, John V.; Voss, Paul B.; Blake, D. R.; Baker, Angela K.; Warneke, Carsten; Welsh-Bon, Daniel; de Gouw, Joost A.; Zheng, J.; Zhang, Renyi; Rudolph, Jochen; Junkermann, W.; Riemer, D.

    2010-01-01T23:59:59.000Z

    The volatile organic compound (VOC) distribution in the Mexico City Metropolitan Area (MCMA) and its evolution as it is uplifted and transported out of the MCMA basin was studied during the 2006 MILAGRO/MIRAGE-Mex field campaign. The results show that in the morning hours in the city center, the VOC distribution is dominated by non-methane hydrocarbons (NMHCs) but with a substantial contribution from oxygenated volatile organic compounds (OVOCs), predominantly from primary emissions. Alkanes account for a large part of the NMHC distribution in terms of mixing ratios. In terms of reactivity, NMHCs also dominate overall, especially in the morning hours. However, in the afternoon, as the boundary layer lifts and air is mixed and aged within the basin, the distribution changes as secondary products are formed. The WRF-Chem (Weather Research and Forecasting with Chemistry) model and MOZART (Model for Ozone and Related chemical Tracers) were able to reproduce the general features of the daytime cycle of the VOC OH reactivity distribution showing that NMHCs dominate the distribution except in the afternoon hours and that the VOC OH reactivity peaks in the early morning due to high morning emissions from the city into a shallow boundary layer. The WRF-Chem and MOZART models showed higher reactivity than the experimental data during the nighttime cycle, perhaps indicating problems with the modeled nighttime boundary layer height. In addition, a plume was studied in which air was advected out of the MCMA and intercepted downwind with the DOE G1 on March 18 and the NCAR C130 one day later on March 19. A number of identical species measured aboard each aircraft gave insight into the chemical evolution of the plume as it aged and was transported as far as 1000 km downwind. Ozone and many OVOCs were photochemically produced in the plume. The WRF-Chem and MOZART models were used to examine the spatial and temporal extent of the March 19 plume and to help interpret the OH reactivity in the downwind plume. The model results generally showed good agreement with experimental results for the total VOC OH reactivity downwind and gave insight into the distributions of VOC chemical classes downwind. A box model with detailed gas phase chemistry (NCAR Master Mechanism), initialized with concentrations observed at one of the ground sites in the MCMA, was used to examine the expected evolution of specific VOCs over a 1-2 day period. The models clearly supported the experimental evidence for NMHC oxidation leading to the formation of OVOCs downwind, which then become the primary fuel for ozone production far away from the MCMA.

  5. Cooling energy savings potential of light-colored roofs for residential and commercial buildings in 11 US metropolitan areas

    SciTech Connect (OSTI)

    Konopacki, S.; Akbari, H.; Pomerantz, M.; Gabersek, S.; Gartland, L.

    1997-05-01T23:59:59.000Z

    Light-colored roofs reflect more sunlight than dark roofs, thus they keep buildings cooler and reduce air-conditioning demand. Typical roofs in the United States are dark, which creates a potential for savings energy and money by changing to reflective roofs. In this report, the authors make quantitative estimates of the impact of roof color by simulating prototypical buildings with light- and dark-colored roofs and calculating savings by taking the differences in annual cooling and heating energy use, and peak electricity demand. Monetary savings are calculated using local utility rates. Savings are estimated for 11 U.S. Metropolitan Statistical Areas (MSAs) in a variety of climates.

  6. Metropolitan Transportation Plan 2035

    E-Print Network [OSTI]

    Tyler Area Metropolitan Planning Organization

    2009-12-04T23:59:59.000Z

    Adopted by the Tyler Area MPO Policy Committee December 4, 2009 METROPOLITAN TRANSPORTATION PLAN 2035 Revised April 22, 2010 Adopted by the Tyler Area MPO Policy Committee December 4, 2009 Amended/Revised April 22, 2010 Prepared by: Bucher..., Willis, and Ratliff Corporation 1828 East Southeast Loop 323, Suite 202 Tyler, Texas 75701 903.581.7844 This Document Serves as an Update to the Tyler Area Metropolitan Transportation Plan 2030. Portions of that Document were Unchanged and Appear...

  7. Comparison of Daytime and Nighttime Populations Adjacent to Interstate Highways in Metropolitan Areas Using LandScan USA

    SciTech Connect (OSTI)

    Johnson, Paul E [ORNL] [ORNL

    2007-01-01T23:59:59.000Z

    An article of similar title was published in the International Journal of Radioactive Materials Transport in 1999. The study concluded that the daytime and nighttime populations are not substantially different for the metropolitan areas examined. This study revisits the issue, but using the LandScan USA high resolution population distribution data, which includes daytime and night-time population. Segments of Interstate highway beltways, along with the direct route through the city, for Atlanta, St. Louis, and Kansas City are examined with an 800m buffer from either side of the highways. The day/night ratio of population is higher using the LandScan USA data. LandScan USA daytime and night-time data will be incorporated into the TRAGIS routing model in future.

  8. Sanders, J. E.; and Merguerian, Charles, 1992a, Directional history of Pleistocene glaciers inferred from features eroded on bedrock, New York metropolitan area, SE NY.

    E-Print Network [OSTI]

    Merguerian, Charles

    Sanders, J. E.; and Merguerian, Charles, 1992a, Directional history of Pleistocene glaciers inferred from features eroded on bedrock, New York metropolitan area, SE NY. If a glacier erodes bedrock, the usual perception is that the youngest glacier will obliterate all direction-of-flow evidence that any

  9. Regional planning and operations architectures as means to foster transportation integration in the Mexico City Metropolitan Area

    E-Print Network [OSTI]

    Ortiz Mantilla, Bernardo Jose, 1977-

    2005-01-01T23:59:59.000Z

    The MCMA complexity in political, institutional, economical, and jurisdictional terms has resulted in limited coordination between MCMA authorities that in conjunction with the limited role of metropolitan transportation ...

  10. Use of Facility Contractor Employees for Services to DOE in the Washington, D.C., Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2001-07-12T23:59:59.000Z

    To clarify and modify policies and procedures for management of Department of Energy (DOE), including National Nuclear Security Administration (NNSA), facility contractor employees located in the Washington, D.C., area. Cancels DOE N 350.5. Certified 12-28-06. Canceled by DOE O 350.2A.

  11. Community air pollution and mortality: Analysis of 1980 data from US metropolitan areas. 1: Particulate air pollution

    SciTech Connect (OSTI)

    Lipfert, F.W.

    1992-11-01T23:59:59.000Z

    1980 data from up to 149 metropolitan areas were used to define cross-sectional associations between community air pollution and excess human mortality. The regression model proposed by Oezkaynak and Thurston, which accounted for age, race, education, poverty, and population density, was evaluated and several new models were developed. The new models also accounted for population change, drinking water hardness, and smoking, and included a more detailed description of race. Cause-of-death categories analyzed include all causes, all non-external causes, major cardiovascular diseases, and chronic obstructive pulmonary diseases (COPD). Both annual mortality rates and their logarithms were analyzed. The data on particulates were averaged across all monitoring stations available for each SMSA and the TSP data were restricted to the year 1980. The associations between mortality and air pollution were found to be dependent on the socioeconomic factors included in the models, the specific locations included din the data set, and the type of statistical model used. Statistically significant associations were found between TSP and mortality due to non-external causes with log-linear models, but not with a linear model, and between TS and COPD mortality for both linear and log-linear models. When the sulfate contribution to TSP was subtracted, the relationship with COPD mortality was strengthened. Scatter plots and quintile analyses suggested a TSP threshold for COPD mortality at around 65 ug/m{sup 3} (annual average). SO{sub 4}{sup {minus}2}, Mn, PM{sup 15}, and PM{sub 2.5} were not significantly associated with mortality using the new models.

  12. Use of Facility Contractor Employees for Services to DOE in the Washington, D.C., Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1999-04-15T23:59:59.000Z

    To clarify and modify policies and procedures for management of Department of Energy (DOE) facility contractor employees located in the Washington, D.C., area. A facility contractor employee is any employee of either a contractor responsible for managing a Department-owned facility, such as a National Laboratory, or a subcontractor of such a contractor. Facility contractor means any contractor performing under a Management and Operating (M&O), Management and Integration (M&I), or Environmental Restoration Management Contractor (ERMC) contract awarded by a DOE contracting officer. Canceled by DOE O 350.2.

  13. Characterization of Fine Particulate Matter (PM) and Secondary PM Precursor Gases in the Mexico City Metropolitan Area

    SciTech Connect (OSTI)

    Luisa T. Molina, Rainer Volkamer, Benjamin de Foy, Wenfang Lei, Miguel Zavala, Erik Velasco; Mario J. Molina

    2008-10-31T23:59:59.000Z

    This project was one of three collaborating grants funded by DOE/ASP to characterize the fine particulate matter (PM) and secondary PM precursors in the Mexico City Metropolitan Area (MCMA) during the MILAGRO Campaign. The overall effort of MCMA-2006, one of the four components, focused on i) examination of the primary emissions of fine particles and precursor gases leading to photochemical production of atmospheric oxidants and secondary aerosol particles; ii) measurement and analysis of secondary oxidants and secondary fine PM production, with particular emphasis on secondary organic aerosol (SOA), and iii) evaluation of the photochemical and meteorological processes characteristic of the Mexico City Basin. The collaborative teams pursued the goals through three main tasks: i) analyses of fine PM and secondary PM precursor gaseous species data taken during the MCMA-2002/2003 campaigns and preparation of publications; ii) planning of the MILAGRO Campaign and deployment of the instrument around the MCMA; and iii) analysis of MCMA-2006 data and publication preparation. The measurement phase of the MILAGRO Campaign was successfully completed in March 2006 with excellent participation from the international scientific community and outstanding cooperation from the Mexican government agencies and institutions. The project reported here was led by the Massachusetts Institute of Technology/Molina Center for Energy and the Environment (MIT/MCE2) team and coordinated with DOE/ASP-funded collaborators at Aerodyne Research Inc., University of Colorado at Boulder and Montana State University. Currently 24 papers documenting the findings from this project have been published. The results from the project have improved significantly our understanding of the meteorological and photochemical processes contributing to the formation of ozone, secondary aerosols and other pollutants. Key findings from the MCMA-2003 include a vastly improved speciated emissions inventory from on-road vehicles: the MCMA motor vehicles produce abundant amounts of primary PM, elemental carbon, particle-bound polycyclic aromatic hydrocarbons, carbon monoxide and a wide range of air toxics; the feasibility of using eddy covariance techniques to measure fluxes of volatile organic compounds in an urban core and a valuable tool for validating local emissions inventory; a much better understanding of the sources and atmospheric loadings of volatile organic compounds; the first spectroscopic detection of glyoxal in the atmosphere; a unique analysis of the high fraction of ambient formaldehyde from primary emission sources; characterization of ozone formation and its sensitivity to VOCs and NOx; a much more extensive knowledge of the composition, size distribution and atmospheric mass loadings of both primary and secondary fine PM, including the fact that the rate of MCMA SOA production greatly exceeded that predicted by current atmospheric models; evaluations of significant errors that can arise from standard air quality monitors for O3 and NO2; and the implementation of an innovative Markov Chain Monte Carlo method for inorganic aerosol modeling as a powerful tool to analyze aerosol data and predict gas phase concentrations where these are unavailable. During the MILAGRO Campaign the collaborative team utilized a combination of central fixed sites and a mobile laboratory deployed throughout the MCMA to representative urban and boundary sites to measure trace gases and fine particles. Analysis of the extensive 2006 data sets has confirmed the key findings from MCMA-2002/2003; additionally MCMA-2006 provided more detailed gas and aerosol chemistry and wider regional scale coverage. Key results include an updated 2006 emissions inventory; extension of the flux system to measure fluxes of fine particles; better understanding of the sources and apportionment of aerosols, including contribution from biomass burning and industrial sources; a comprehensive evaluation of metal containing particles in a complex urban environment; identification of a close correlation between

  14. Learning sustainable metropolitan development for european students of planning

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Learning sustainable metropolitan development for european students of planning Serrano José, project assessment, sustainable developement, team work Introduction Metropolitan areas are experiencing ways which are more sustainable than others. In our planning training, we teach sustainable development

  15. Metropolitan Transportation Plan 2009-2035

    E-Print Network [OSTI]

    South Central Planning and Development Commission

    2009-05-14T23:59:59.000Z

    ?? Metropolitan? Transportation?Plan? 2009?2035? ? This?document?is?the?long?range?transportation?plan?for?the?Houma?Thibodaux? Metropolitan?Planning?Organization.??It?represents?the?staged?implementation?of? the?transportation...?needs?in?the?Houma?Thibodaux?urbanized?area,?extending?from? 2009?to?2035.? ? Adopted?on?May?14,?2009? Prepared?by?the?South?Central?Planning?and?Development?Commission? ? Adopted My 14, 2009 [METROPOLITAN TRANSPORTATION PLAN] 2 Contents Chapters Page 1 Introduction 5 2 Existing...

  16. Harnessing the Power of the Sun, Solar Impulse Plane Lands in DC Area

    Broader source: Energy.gov [DOE]

    Today, Secretary Moniz spoke at an event welcoming the arrival of the solar-powered Solar Impulse plane at Dulles International Airport near Washington, D.C.

  17. Trap cultures reveal higher species richness of arbuscular mycorrhizal fungi in comparison to soil samples in the Phoenix metropolitan area.Arbuscular mycorrhizal fungal and dark septate endophytes colonization of plant roots from urban desert preserves a

    E-Print Network [OSTI]

    Hall, Sharon J.

    samples in the Phoenix metropolitan area.Arbuscular mycorrhizal fungal and dark septate endophytes mycorrhizal fungal and dark septate endophytes colonization of plant roots from urban desert preserves (Brundett 1999). Dark septate endophytes (DSE) are another type of root colonizing fungi mainly classified

  18. Use of Management and Operating or Other Facility Management Contractor Employees for Services to DOE in the Washington, D.C. Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2015-05-18T23:59:59.000Z

    The Order establishes policies and procedures for managing DOE and NNSA management and operating (M&O) contractors and other facility management contractor employees assigned to the Washington, D.C., area.

  19. Use of Management and Operating or Other Facility Management Contractor Employees for Services to DOE in the Washington, D.C., Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2003-10-29T23:59:59.000Z

    To establish policies and procedures for management of DOE, including NNSA, Management and Operating (M&O) and other facility management contractor employees assigned to the Washington, D.C., area. Cancels DOE O 350.2.

  20. Identification of Water Resources Planning Problems in the Metropolitan Area of Greater San Antonio and its Associated Counties

    E-Print Network [OSTI]

    Garner, J. K.; Shih, C. S.

    1973-01-01T23:59:59.000Z

    agencies, river authorities and interest groups in water resources management have evolved into a complicated system in this area. Thus, it was realized that an overview embedded with the systems approach for the current water resources problems is needed...

  1. Identification of Management and Planning Problems of Urban Water Resources in the Metropolitan Area of Greater San Antonio

    E-Print Network [OSTI]

    Garner, K.; Shih, C. S.

    including the inventory and planning control for both surface and ground Water Resource Management of the San Antonio area are presented. Emphasis has been placed upon the identification of the probabilistic nature of various decision-making parameters...

  2. Sustainable metropolitan growth strategies : exploring the role of the built environment

    E-Print Network [OSTI]

    Diao, Mi, Ph. D. Massachusetts Institute of Technology

    2010-01-01T23:59:59.000Z

    The sustainability of metropolitan areas has been considered one of the most significant social challenges worldwide. Among the various policy options to achieve sustainable metropolitan growth, smart-growth strategies ...

  3. Supplemental Requirements for the Use of Management and Operating or Other Facility Management Contractor Employees for Services to DOE in the Washington, D.C., Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2005-10-19T23:59:59.000Z

    The Notice supplements review and approval requirements of DOE O 350.2A, Use of Management and Operating (M&O) or Other Facility Management Contractor Employees for Services to DOE in the Washington, D.C., Area, dated 10-29-03.

  4. Use of Management and Operating or Other Facility Management Contractor Employees for Services to DOE in the Washington, D.C. Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2011-05-31T23:59:59.000Z

    To establish policies and procedures for management of Department of Energy (DOE), including National Nuclear Security Administration (NNSA), management and operating (M&O) and other facility management contractor employees assigned to the Washington, D.C. area. Cancels DOE O 350.2A

  5. TransBorder 2035 Metropolitan Transportation Plan

    E-Print Network [OSTI]

    El Paso Metropolitan Planning Organization

    2007-11-16T23:59:59.000Z

    i TransBorder 2035 Metropolitan Transportation Plan November 16, 2007 El Paso Metropolitan Planning Organization www.elpasompo.org ii TransBorder 2035 Metropolitan Transportation Plan November 16, 2007... El Paso Metropolitan Planning Organization www.elpasompo.org iii TransBorder 2035 Metropolitan Transportation Plan November 16, 2007 El Paso Metropolitan Planning Organization www.elpasompo.org iv Trans...

  6. Hot Springs Metropolitan Planning Organization 2030 Long Range Transportation Plan

    E-Print Network [OSTI]

    Hot Springs Metropolitan Planning Organization

    2005-11-03T23:59:59.000Z

    Federal Highway Administration Federal Transit Administration 2030 Long Range Transportation Plan for the Hot Springs Area Metropolitan Planning Organization This LRTP has been funded with federal Metropolitan Planning (PL) funds through... the Federal Highway Administration, Section 5303 funds through the Federal Transit Administration, the State of Arkansas, and participating agency local match funds. HSA-MPO 100 Broadway Terrace Hot Springs, AR 71901 501-321-4804 HSA...

  7. 2030 Metropolitan Transportation Plan for the Albuquerque Metropolitan Planning Area

    E-Print Network [OSTI]

    Mid-Region Metropolitan Planning Organization

    2007-04-26T23:59:59.000Z

    ...................................................................13-13 #0;#1;#0;#1; #0;5#0;"#0;##0;-#0;4#0;#1; 2-1 Population Density by Municipality, 2000-2004 ..........................................................................................2-2 2-2 Population by Municipality, 2000-2004..........................................................................................................2-3... .....................................................................................14-2 14-2 Neighborhood Association and Community Group MTP Meetings....................................................14-3 #0;#1; #0;'#0;*#0;(#0;6#0;3#0;4#0;#1; 2-1 Residential Building Permits, 1990...

  8. Abilene Metropolitan Area Metropolitan Transportation Plan 2010-2035

    E-Print Network [OSTI]

    Abilene Metropolitan Planning Organization

    2010-01-12T23:59:59.000Z

    City City of Abilene, Texas Class. Classification Col. Collector E. East Equip. Equipment FAA Federal Aviation Administration FHWA Federal Highway Administration FTA Federal Transit Administration FR or fr Frontage Road FM..., Texas Jones County Taylor County Texas Department of Transportation United States Department of Transportation Federal Highway Administration Federal Transit Administration Adopted by Policy Board January 12, 2010 Table...

  9. 2030 Metropolitan Transportation Plan for the Albuquerque Metropolitan Planning Area 

    E-Print Network [OSTI]

    Mid-Region Metropolitan Planning Organization

    2007-04-26T23:59:59.000Z

    ;B#0;O#0;#1;#0;5#0;S#0;B#0;O#0;T#0;Q#0;P#0;S#0;U#0;B#0;U#0;J#0;P#0;O#0;#1;#0;1#0;M#0;B#0;O#0;#1;#0; #0;.#0;5#0;1#0; #0;#1; #0;G#0;P#0;S#0;#1;#0;U#0;I#0;F#0;#1;#0;"#0;M#0;C#0;V#0;R#0;V#0;F#0;S#0;R#0;V#0;F#0;#1;#0;.#0;F#0;U#0;S#0;P#0;Q#0;P#0;M#0;J#0;U#0...#0;#19;#0;#17;#0;#20;#0;#17;#0;#1;#0;.#0;F#0;U#0;S#0;P#0;Q#0;P#0;M#0;J#0;U#0;B#0;O#0;#1;#0;5#0;S#0;B#0;O#0;T#0;Q#0;P#0;S#0;U#0;B#0;U#0;J#0;P#0;O#0;#1;#0;1#0;M#0;B#0;O#0;#1;#0; #0;.#0;5#0;1#0; #0;#1; #0;G#0;P#0;S#0;#1;#0;U#0;I#0;F#0;#1;#0;"#0;M#0;C#0...

  10. Investigations of Atmospheric and Plant Physiological Effects along an Urban-To-Rural Gradient in the Houston Metropolitan Area Comparing 2011 to 2012

    E-Print Network [OSTI]

    Gramann, Jonathan

    2014-09-02T23:59:59.000Z

    Township”) is a master-planned community started in 1974 and currently covering 115 km2 with a population of over 100,000 residents and a median household income over $100,000 [US Census Bureau 2012]. As the name indicates, The Woodlands is a heavily... wooded area. According to their official website, "the Woodlands philosophy even encourages ‘natural yards’ with less grass and more forest" [The Woodlands Township 2014]. The weather station is located behind the 5 school in an area characteristic...

  11. Emerging factors associated with the decline of a gray fox population and multi-scale land cover associations of mesopredators in the Chicago metropolitan area.

    SciTech Connect (OSTI)

    Willingham, Alison N.; /Ohio State U.; ,

    2008-01-01T23:59:59.000Z

    Statewide surveys of furbearers in Illinois indicate gray (Urocyon cinereoargenteus) and red (Vulpes vulpes) foxes have experienced substantial declines in relative abundance, whereas other species such as raccoons (Procyon lotor) and coyotes (Canis latrans) have exhibited dramatic increases during the same time period. The cause of the declines of gray and red foxes has not been identified, and the current status of gray foxes remains uncertain. Therefore, I conducted a large-scale predator survey and tracked radiocollared gray foxes from 2004 to 2007 in order to determine the distribution, survival, cause-specific mortality sources and land cover associations of gray foxes in an urbanized region of northeastern Illinois, and examined the relationships between the occurrence of gray fox and the presence other species of mesopredators, specifically coyotes and raccoons. Although generalist mesopredators are common and can reach high densities in many urban areas their urban ecology is poorly understood due to their secretive nature and wariness of humans. Understanding how mesopredators utilize urbanized landscapes can be useful in the management and control of disease outbreaks, mitigation of nuisance wildlife issues, and gaining insight into how mesopredators shape wildlife communities in highly fragmented areas. I examined habitat associations of raccoons, opossums (Didelphis virginiana), domestic cats (Felis catus), coyotes, foxes (gray and red), and striped skunks (Mephitis mephitis) at multiple spatial scales in an urban environment. Gray fox occurrence was rare and widely dispersed, and survival estimates were similar to other studies. Gray fox occurrence was negatively associated with natural and semi-natural land cover types. Fox home range size increased with increasing urban development suggesting that foxes may be negatively influenced by urbanization. Gray fox occurrence was not associated with coyote or raccoon presence. However, spatial avoidance and mortality due to coyote predation was documented and disease was a major mortality source for foxes. The declining relative abundance of gray fox in Illinois is likely a result of a combination of factors. Assessment of habitat associations indicated that urban mesopredators, particularly coyotes and foxes, perceived the landscape as relatively homogeneous and that urban mesopredators interacted with the environment at scales larger than that accommodated by remnant habitat patches. Coyote and fox presence was found to be associated with a high degree of urban development at large and intermediate spatial scales. However, at a small spatial scale fox presence was associated with high density urban land cover whereas coyote presence was associated with urban development with increased forest cover. Urban habitats can offer a diversity of prey items and anthropogenic resources and natural land cover could offer coyotes daytime resting opportunities in urban areas where they may not be as tolerated as smaller foxes. Raccoons and opossums were found to utilize moderately developed landscapes with interspersed natural and semi-natural land covers at a large spatial scale, which may facilitate dispersal movements. At intermediate and small spatial scales, both species were found to utilize areas that were moderately developed and included forested land cover. These results indicated that raccoons and opossums used natural areas in proximity to anthropogenic resources. At a large spatial scale, skunk presence was associated with highly developed landscapes with interspersed natural and semi-natural land covers. This may indicate that skunks perceived the urban matrix as more homogeneous than raccoons or opossums. At an intermediate spatial scale skunks were associated with moderate levels of development and increased forest cover, which indicated that they might utilize natural land cover in proximity to human-dominated land cover. At the smallest spatial scale skunk presence was associated with forested land cover surrounded by a suburban matrix. Compared to raccoon

  12. Set of Comparable Carbon Footprints for Highway Travel in Metropolitan America

    SciTech Connect (OSTI)

    Southworth, Frank [ORNL; Sonnenberg, Anthon [Georgia Institute of Technology

    2011-01-01T23:59:59.000Z

    The authors describe the development of a set of carbon dioxide emissions estimates for highway travel by automobile, truck, bus and other public transit vehicle movements within the nation s 100 largest metropolitan areas, in calendar year 2005. Considerable variability is found to exist across metropolitan areas when these greenhouse gas emissions are measured on a per capita and a per gross metropolitan product (GMP) basis. Least square regression modeling shows a relationship between emissions per capita and per GMP with truck traffic share, transit share, employment density, population dispersion within the metro area, and GMP per capita. As a result many of the nation s largest metropolitan areas tend to have lower CO2 emissions per capita and per GMP than smaller and more recently developed metro areas.

  13. Metropolitan Ethernet Network: A Move from LAN to MAN

    E-Print Network [OSTI]

    California at Davis, University of

    transformed from a CSMA/CD technology providing low throughput to a full duplex link increasing the throughput the transformation of Ethernet from the mainstream LAN technology to the possible adoption for metropolitan area networks (MENs). This paper will introduce the movement from basic Ethernet to the carrier grade Ethernet

  14. Baton Rouge Metropolitan Transportation Plan Update

    E-Print Network [OSTI]

    Capital Region Planning Commission

    (028) SUBMITTED TO: LOUISIANA DEPARTMENT OF TRANSPORTATION AND DEVELOPMENT SUBMITTED BY: IN ASSOCIATION WITH: & FINAL Metropolitan Transportation Plan Update Baton Rouge, LA... ............................189? X. APPENDIX .........................................................................................................................195? ? Metropolitan Transportation Plan Update...

  15. Unequal development : decentralization and fiscal disparities in the Metropolitan Zone of the Valley of Mexico

    E-Print Network [OSTI]

    Raich, Uri

    2006-01-01T23:59:59.000Z

    This study is about the impact of decentralization in metropolitan areas. Studies of fiscal decentralization have largely centered on the formal tiers of government, without looking at the effects of this process on the ...

  16. Economic impact of M.I.T. on Cambridge and Metropolitan Boston

    E-Print Network [OSTI]

    Finberg, Irving William

    1964-01-01T23:59:59.000Z

    This thesis investigated the economic impact of the Massachusetts Institute of Technology on its host city, Cambridge, and upon the Boston Metropolitan Area. The primary purpose was to develop sufficient information about ...

  17. Metropolitan governance and local land use planning in Boston, Denver, and Portland

    E-Print Network [OSTI]

    Rosan, Christina

    2007-01-01T23:59:59.000Z

    Metropolitan areas across the U.S. are characterized by sprawling development which uses larger amounts of open space than necessary, leads to the inefficient use of energy and water, increases social inequality, and causes ...

  18. Bi-directional dc-dc Converter

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

    Purpose of Work for FY08 1. Vehicle modeling, simulation, and operation voltages optimization. 2. DC-DC Power converter and control modeling. 3. Silicon Carbide device...

  19. Bi-directional dc-dc Converter

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

    MTBF Dc-dc Fabrication Validation Data Performance Validation BOM and Cost analysis EMIEMC Custom Components Fabrication Components Validation Vehicle System Review Phase-I...

  20. MANCHESTER METROPOLITAN Financial Statements

    E-Print Network [OSTI]

    (includes share of associated company's result) (199,979) (185,386) Impairment on properties in an impairment charge of Ł7.7m The University has during the past year been planning the implementation of six seven campus areas down to three and will ensure the University has a sustainable estate for the future

  1. The participation, spatial distribution, and consumption patterns of boaters residing in Metropolitan Toronto

    E-Print Network [OSTI]

    Weakley, John Robert James

    1971-01-01T23:59:59.000Z

    Board produced a conceptual plan for the redevelopment of the fifty miles of Lake Ontario shoreline within the Metropolitan Toronto Planning Area. Although the Plan provided for numerous marinas and boatramps, the Planning Board was hampered by a... to as the summer cottage is particularly well developed in Central Ontario (9). A large percentage of the boats licensed in Metropolitan Toronto are used in conjunction with these cottages (10). This porportionately high non-urban use of boats can be expected...

  2. Metropolitan Road Traffic Simulation on FPGAs.

    SciTech Connect (OSTI)

    Tripp J. L. (Justin L.); Mortveit, H. S. (Henning S.); Hansson, A. A. (Anders A.); Gokhale, M. (Maya)

    2005-01-01T23:59:59.000Z

    This work demonstrates that road traffic simulation of entire metropolitan areas is possible with reconfigurable supercomputing that combines 64-bit microprocessors and FPGAs in a high bandwidth, low latency interconnect. Previously, traffic simulation on FPGAs was limited to very short road segments or required a very large number of FPGAs. Our data streaming approach overcomes scaling issues associated with direct implementations and still allows for high-level parallelism by dividing the data sets between hardware and software across the reconfigurable supercomputer. Using one FPGA on the Cray XD1 supercomputer, we are able to achieve a 34.4 x speed up over the AMD microprocessor. System integration issues must be optimized to exploit this speedup in the overall simulation.

  3. Radio frequency dc-dc power conversion

    E-Print Network [OSTI]

    Rivas, Juan, 1976-

    2007-01-01T23:59:59.000Z

    THIS THESIS addresses the development of system architectures and circuit topologies for dc-dc power conversion at very high frequencies. The systems architectures that are developed are structured to overcome limitations ...

  4. The Metropolitan Surface Water Management Act (Minnesota)

    Broader source: Energy.gov [DOE]

    The Metropolitan Surface Water Management Act aims to protect, preserve, and use natural, surface, and groundwater storage and retention systems; identify and plan for means to improve and protect...

  5. Metropolitan Accessibility and Transportation Sustainability:Sustainability

    E-Print Network [OSTI]

    Papalambros, Panos

    Metropolitan Accessibility and Transportation Sustainability:Sustainability: Comparative Reduce (fulfillment of)Promote Sustainability: Meet needs of (fulfillment of) needs present Institute SMART Sustainable Mobility and Accessibility Research andSMART Sustainable Mobility

  6. area pollution sources: Topics by E-print Network

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

    unless Rodney B. W. Smith; Theodore D. Tomasi 63 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  7. air pollutants area: Topics by E-print Network

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

    4 Technology and policy options for reducing industrial air pollutants in the Mexico City Metropolitan Area MIT - DSpace Summary: Technology plays an important role in...

  8. area heavily polluted: Topics by E-print Network

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

    of (more) Enohnyaket, John 2013-01-01 18 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  9. area southern mexico: Topics by E-print Network

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

    public domain British Columbia (l; R. H. Pinsent 5 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  10. area nellis air: Topics by E-print Network

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

    reduction credits (offsets); Tuan Ngo P. E 39 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  11. area pollution advisory: Topics by E-print Network

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

    Semrau; Joe Simmler; Jane Zimmerman 2005-01-01 17 Impact of primary formaldehyde on air pollution in the Mexico City Metropolitan Area MIT - DSpace Summary: Formaldehyde (HCHO)...

  12. DC source assemblies

    DOE Patents [OSTI]

    Campbell, Jeremy B; Newson, Steve

    2013-02-26T23:59:59.000Z

    Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.

  13. U.S. Metropolitan Spatial Structure and Employment Growth

    E-Print Network [OSTI]

    Huang, Xiaoyan

    2014-08-13T23:59:59.000Z

    This study explores the influence of US metropolitan spatial structure evolution on regional employment growth rate. The first part of this study investigates the evolution of US metropolitan spatial structures from 2000 to 2010. At the macro level...

  14. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2013-01-01T23:59:59.000Z

    resources, a 10 kW vertical axis wind turbine, and Fig. 4AC-grid Fig. 3. Vertical axis wind turbine in the AIT DC µ

  15. Building Scale DC Microgrids

    E-Print Network [OSTI]

    Marnay, Chris

    2014-01-01T23:59:59.000Z

    resources, a 10 kW vertical axis wind turbine, and Fig. 4the µgrid Fig. 3. Vertical axis wind turbine in the AIT DC µ

  16. METROPOLITAN TRANSPORTATION SUPPORT INITIATIVE (METSI) QUARTERLY REPORT

    E-Print Network [OSTI]

    Illinois at Chicago, University of

    METROPOLITAN TRANSPORTATION SUPPORT INITIATIVE (METSI) QUARTERLY REPORT for the quarter ending over 50%) of residents throughout the state of Illinois would support a 5 cent per gallon gas tax if the proceeds were to improve roads and transit. The other survey, 2002 Market Survey undertaken by RTA examined

  17. Multilevel DC link inverter

    DOE Patents [OSTI]

    Su, Gui-Jia

    2003-06-10T23:59:59.000Z

    A multilevel DC link inverter and method for improving torque response and current regulation in permanent magnet motors and switched reluctance motors having a low inductance includes a plurality of voltage controlled cells connected in series for applying a resulting dc voltage comprised of one or more incremental dc voltages. The cells are provided with switches for increasing the resulting applied dc voltage as speed and back EMF increase, while limiting the voltage that is applied to the commutation switches to perform PWM or dc voltage stepping functions, so as to limit current ripple in the stator windings below an acceptable level, typically 5%. Several embodiments are disclosed including inverters using IGBT's, inverters using thyristors. All of the inverters are operable in both motoring and regenerating modes.

  18. Metropolitan Transportation Plan Fiscal Year 2010 - 2035

    E-Print Network [OSTI]

    Corpus Christi Metropolitan Planning Organization

    2009-12-03T23:59:59.000Z

    Approved by the Transportation Policy Committee December 3, 2009 Disclaimer Statement: The preparation of this report has been financed in part through grant[s] from the Federal Highway Administration and Federal... Transit Administration, U.S. Department of Transportation, under the State Planning and Research Program, Section 505 [or Metropolitan Planning Program, Section 104(f)] of Title 23, U.S. Code. The contents of this report do not necessarily reflect...

  19. Connections 2035 The Waco Metropolitan Transportation Plan

    E-Print Network [OSTI]

    Waco Metropolitan Planning Organization

    2010-02-03T23:59:59.000Z

    Administration, Federal Transit Administration, and the Texas Department of Transportation. Preface The Waco Metropolitan Planning Organization has prepared this plan in compliance with the Safe, Accountable, Flexible and Efficient Transportation Equity Act...: A Legacy for Users (SAFETEA-LU). The preparation of this plan has been funded in part through grants by the Federal Highway Administration, the Federal Transit Administration and the Texas Department of Transportation. The contents...

  20. Metropolitan Transportation Plan 2005-2030

    E-Print Network [OSTI]

    Santa Fe Metropolitan Planning Organization

    1999-01-01T23:59:59.000Z

    The Santa Fe Metropolitan Transportation Plan 2005-2030 (MTP) replaces the Santa Fe MPO Long Range Transportation Plan 2000-2020 as a guide for developing a safer, more efficient and effective transportation system that serves the residents..., commuters and visitors to Santa Fe. The theme of ?providing interconnected options for more travel choices? reflects a strong public call for a safer and more functional interconnected network of roads, trails and transit routes that gives people a choice...

  1. Amarillo Metropolitan Transportation Plan 2010-2035

    E-Print Network [OSTI]

    Amarillo Metropolitan Planning Organization

    2009-10-15T23:59:59.000Z

    , natural resources, environmental protection, conservation, and historic preservation concerning the development of long- and short- range transportation plans. MPO maintains a website www.amarillompo.org that includes this Metropolitan Transportation... Commissioner City of Amarillo Alan M. Taylor City Manager City of Amarillo Howard Holland, P.E. District Engineer TxDOT Kenneth Petr, P.E. Dir. of Transportation Planning & Development TxDOT Judge Arthur Ware County Judge Potter County H.R. Kelly County...

  2. accra metropolitan area: Topics by E-print Network

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

    that the role of transmission in the development of competitive markets in wholesale electric power in the US. We discuss the various developments on both the legislative and...

  3. METROPOLITAN REPORT Economic Indicators for the New Orleans Area

    E-Print Network [OSTI]

    Kulp, Mark

    , about 0.9% or 1.1 million jobs were added across the U.S, and initial unemployment claims went down 13. Still, some industries, like construction, are still damaged. According to Portland Cement Association, construction is expected to recov

  4. Open space system study for the Dacca metropolitan area

    E-Print Network [OSTI]

    Rab, Wajeda Jafar

    1970-01-01T23:59:59.000Z

    and aspirations of 70 million of East Pakistan and 120 zillion people of Pakistan. A propor- tio 'ate distribution of the national capital building is desirable. So far Karachi and Islamabad have been successively developed as the admiristrative seats... of the national government at an estimated cost of Rs. 8, 000, 000, 000 end Rs. 4, 000, 000, 000 respectively. The capital building activity of Islamabad has just begun. Dacce. es the legislative seat of the nation has as its share only R . . 20, 000, 000...

  5. METROPOLITAN REPORT Economic Indicators for the New Orleans Area

    E-Print Network [OSTI]

    Kulp, Mark

    data through April to exclude the sizeable impact of the BP Horizon oil spill, because its purpose is to analyze the net recovery from Hurricane Katrina. Later issues of this report will address the BP oil spill

  6. DC attenuation meter

    DOE Patents [OSTI]

    Hargrove, Douglas L.

    2004-09-14T23:59:59.000Z

    A portable, hand-held meter used to measure direct current (DC) attenuation in low impedance electrical signal cables and signal attenuators. A DC voltage is applied to the signal input of the cable and feedback to the control circuit through the signal cable and attenuators. The control circuit adjusts the applied voltage to the cable until the feedback voltage equals the reference voltage. The "units" of applied voltage required at the cable input is the system attenuation value of the cable and attenuators, which makes this meter unique. The meter may be used to calibrate data signal cables, attenuators, and cable-attenuator assemblies.

  7. A global maximum power point tracking DC-DC converter

    E-Print Network [OSTI]

    Duncan, Joseph, 1981-

    2005-01-01T23:59:59.000Z

    This thesis describes the design, and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the ...

  8. DC arc weld starter

    DOE Patents [OSTI]

    Campiotti, Richard H. (Tracy, CA); Hopwood, James E. (Oakley, CA)

    1990-01-01T23:59:59.000Z

    A system for starting an arc for welding uses three DC power supplies, a high voltage supply for initiating the arc, an intermediate voltage supply for sustaining the arc, and a low voltage welding supply directly connected across the gap after the high voltage supply is disconnected.

  9. Historical Material Analysis of DC745U Pressure Pads

    SciTech Connect (OSTI)

    Ortiz-Acosta, Denisse [Los Alamos National Laboratory

    2012-07-30T23:59:59.000Z

    As part of the Enhance Surveillance mission, it is the goal to provide suitable lifetime assessment of stockpile materials. This report is an accumulation of historical publication on the DC745U material and their findings. It is the intention that the B61 LEP program uses this collection of data to further develop their understanding and potential areas of study. DC745U is a commercially available silicone elastomer consisting of dimethyl, methyl-phenyl, and methyl-vinyl siloxane repeat units. Originally, this material was manufactured by Dow Corning as Silastic{reg_sign} DC745U at their manufacturing facility in Kendallville, IN. Recently, Dow Corning shifted this material to the Xiameter{reg_sign} brand product line. Currently, DC745U is available through Xiameter{reg_sign} or Dow Corning's distributor R. D. Abbott Company. DC745U is cured using 0.5 wt% vinyl-specific peroxide curing agent known as Luperox 101 or Varox DBPH-50. This silicone elastomer is used in numerous parts, including two major components (outer pressure pads and aft cap support) in the W80 and as pressure pads on the B61. DC745U is a proprietary formulation, thus Dow Corning provides limited information on its composition and properties. Based on past experience with Dow Corning, DC745U is at risk of formulation changes without notification to the costumer. A formulation change for DC745U may have a significant impact because the network structure is a key variable in determining material properties. The purpose of this report is to provide an overview of historical DC745U studies and identify gaps that need to be addressed in future work. Some of the previous studies include the following: 1. Spectroscopic characterization of raw gum stock. 2. Spectroscopic, thermal, and mechanical studies on cured DC745U. 3. Nuclear Magnetic Resonance (NMR) and solvent swelling studies on DC745U with different crosslink densities. 4. NMR, solvent swelling, thermal, and mechanical studies on thermally aged DC745U. 5. NMR, solvent swelling, thermal, and mechanical studies on radiolytically aged DC745U. Each area is reviewed and further work is suggested to improve our understanding of DC745U for systems engineering, surveillance, aging assessments, and lifetime assessment.

  10. Active dc filter for HVDC system--A test installation in the Konti-Skan DC link at Lindome converter station

    SciTech Connect (OSTI)

    Zhang, Wenyan; Asplund, G. (ABB Power Systems, Ludvika (Sweden). HVDC Division); Aberg, A. (ABB Corporate Research, Lund (Sweden). Dept. of Man-Machine Communication); Jonsson, U. (Svenska Kraftnaet, Vaellingby (Sweden)); Loeoef, O. (Vattenfall AB, Trollhaettan (Sweden). Region Vaestsverige)

    1993-07-01T23:59:59.000Z

    The purpose of introducing active dc filters is to meet the more and more stringent requirement from power utilities on limiting telephone interference caused by harmonic currents from HVdc transmission lines, without unnecessarily increasing the cost of HVdc stations. An active dc filter installed in the Konti-Skan HVdc link is described. The active dc filter is connected at the bottom of an existing passive dc filter at the Lindome station. The active dc filter includes optic harmonic current measuring unit, control system, protection and supervision system, PWM power amplifier, high-frequency transformer, surge arrester, and coupling apparatuses. The active dc filter has small physical size and occupies small ground area. The performance of the active dc filter for eliminating the disturbing harmonics is excellent. To achieve comparable results by passive filters would require something like ten times more high voltage equipment.

  11. The structure of agriculture in metropolitan and nonmetropolitan America

    E-Print Network [OSTI]

    Scott, Michelle L

    2003-01-01T23:59:59.000Z

    variation of agristructure. Furthermore, total crop, grain, cotton, nursery/greenhouse, fruit/vegetable, and "other crop" sales revenues varied by metropolitan proximity, region, and farm system size. Ordinary least squares regression was employed...

  12. Performance Measurement in Small Texas Metropolitan Planning Organizations

    E-Print Network [OSTI]

    Moore, Devin 1984-

    2012-10-16T23:59:59.000Z

    place including a rise in prominence of the Metropolitan Planning Organization (MPO). The public, state and local agencies, and other stakeholders are mutually served by the regional MPO to assure that transportation funding allocation and project...

  13. Metropolitan Edison Company SEF Loans (FirstEnergy Territory)

    Broader source: Energy.gov [DOE]

    FirstEnergy (formerly GPU) established the Metropolitan Edison Company Sustainable Energy Fund in 2000 with an initial contribution of $5.7 million. The fund later received an additional...

  14. The interests of landowners on the metropolitan fringe

    E-Print Network [OSTI]

    Molinsky, Jennifer H. (Jennifer Hrabchak)

    2005-01-01T23:59:59.000Z

    Numerous authors have noted that the patchy, sprawling pattern of development characterizing the metropolitan fringe results in part from the decisions of individual landowners regarding the use, subdivision, development, ...

  15. Efficient detection of contagious outbreaks in massive metropolitan encounter networks

    E-Print Network [OSTI]

    Sun, Lijun

    Physical contact remains difficult to trace in large metropolitan networks, though it is a key vehicle for the transmission of contagious outbreaks. Co-presence encounters during daily transit use provide us with a city-scale ...

  16. Auxiliary resonant DC tank converter

    DOE Patents [OSTI]

    Peng, Fang Z. (Knoxville, TN)

    2000-01-01T23:59:59.000Z

    An auxiliary resonant dc tank (ARDCT) converter is provided for achieving soft-switching in a power converter. An ARDCT circuit is coupled directly across a dc bus to the inverter to generate a resonant dc bus voltage, including upper and lower resonant capacitors connected in series as a resonant leg, first and second dc tank capacitors connected in series as a tank leg, and an auxiliary resonant circuit comprising a series combination of a resonant inductor and a pair of auxiliary switching devices. The ARDCT circuit further includes first clamping means for holding the resonant dc bus voltage to the dc tank voltage of the tank leg, and second clamping means for clamping the resonant dc bus voltage to zero during a resonant period. The ARDCT circuit resonantly brings the dc bus voltage to zero in order to provide a zero-voltage switching opportunity for the inverter, then quickly rebounds the dc bus voltage back to the dc tank voltage after the inverter changes state. The auxiliary switching devices are turned on and off under zero-current conditions. The ARDCT circuit only absorbs ripples of the inverter dc bus current, thus having less current stress. In addition, since the ARDCT circuit is coupled in parallel with the dc power supply and the inverter for merely assisting soft-switching of the inverter without participating in real dc power transmission and power conversion, malfunction and failure of the tank circuit will not affect the functional operation of the inverter; thus a highly reliable converter system is expected.

  17. Power flow analysis for DC voltage droop controlled DC microgrids

    E-Print Network [OSTI]

    Chaudhary, Sanjay

    loss, such as photovoltaic panels, batteries, fuel cells, LEDs, and electronic loads, DC microgrids sharing and secondary voltage regulation can now be analytically studied, and specialized optimization of the DC microgrid, in term of systematic analysis, protection coordination design, network optimization

  18. Triple voltage dc-to-dc converter and method

    DOE Patents [OSTI]

    Su, Gui-Jia (Knoxville, TN)

    2008-08-05T23:59:59.000Z

    A circuit and method of providing three dc voltage buses and transforming power between a low voltage dc converter and a high voltage dc converter, by coupling a primary dc power circuit and a secondary dc power circuit through an isolation transformer; providing the gating signals to power semiconductor switches in the primary and secondary circuits to control power flow between the primary and secondary circuits and by controlling a phase shift between the primary voltage and the secondary voltage. The primary dc power circuit and the secondary dc power circuit each further comprising at least two tank capacitances arranged in series as a tank leg, at least two resonant switching devices arranged in series with each other and arranged in parallel with the tank leg, and at least one voltage source arranged in parallel with the tank leg and the resonant switching devices, said resonant switching devices including power semiconductor switches that are operated by gating signals. Additional embodiments having a center-tapped battery on the low voltage side and a plurality of modules on both the low voltage side and the high voltage side are also disclosed for the purpose of reducing ripple current and for reducing the size of the components.

  19. DC-DC converter current source fed naturally commutated brushless DC motor drive 

    E-Print Network [OSTI]

    Khopkar, Rahul Vijaykumar

    2004-11-15T23:59:59.000Z

    inductor and the huge number of turns needed to achieve these values of the inductances lead to huge resistive losses. Therefore, it is shown that it is possible to replace the controlled rectifier and the large inductor with a suitable dc-dc converter...

  20. DC WRRC REPORT NO. 115 Conference Proceedings

    E-Print Network [OSTI]

    District of Columbia, University of the

    DC WRRC REPORT NO. 115 Conference Proceedings: An Agenda for Black Universities and Colleges. Kargbo Conference Sponsored by The DC Water Resources Research Center University of the District

  1. Bi-Directional DC-DC Converter for PHEV Applications

    SciTech Connect (OSTI)

    Abas Goodarzi

    2011-01-31T23:59:59.000Z

    Plug-In Hybrid Electric Vehicles (PHEV) require high power density energy storage system (ESS) for hybrid operation and high energy density ESS for Electric Vehicle (EV) mode range. However, ESS technologies to maximize power density and energy density simultaneously are not commercially feasible. The use of bi-directional DC-DC converter allows use of multiple energy storage, and the flexible DC-link voltages can enhance the system efficiency and reduce component sizing. This will improve fuel consumption, increase the EV mode range, reduce the total weight, reduce battery initial and life cycle cost, and provide flexibility in system design.

  2. Convergence Analysis of DC Algorithm for DC programming with ...

    E-Print Network [OSTI]

    2010-09-14T23:59:59.000Z

    In this paper, we consider DC programming with subanalytic data. ... Lojasiewicz inequality is an ingredient tool in Subanalytic Geometry as well as in its ... us list some of the elementary properties of subanalytic sets and subanalytic functions ...

  3. Catalog of DC Appliances and Power Systems

    SciTech Connect (OSTI)

    Garbesi, Karina; Vossos, Vagelis; Shen, Hongxia

    2010-10-13T23:59:59.000Z

    This document catalogs the characteristics of current and potential future DC products and power systems.

  4. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    energy efficient products that utilize DC power internally; the demonstrated energy savings of direct-DC in commercial data centers;energy efficient products that utilize DC power internally, the demonstrated energy savings of direct-DC power use in commercial data centers,

  5. Jonesboro Metropolitan Planning Organization 2030 Long Range Transportation Plan

    E-Print Network [OSTI]

    Jonesboro Metropolitan Planning Organization

    southern boundary. The airport is connected to the roadway system by Airport Road connecting Nettleton Avenue and US 49 (Johnson Avenue). According to the Federal Aviation Administration (FAA) information dated July 7, 2005, there are about 123...Jonesboro Metropolitan Planning Organization In cooperation with the Arkansas State Highway and Transportation Department United States Department of Transportation Federal Highway Administration Federal Transit Administration...

  6. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    and among agencies, universities, and other area researchers; and to support the development and Guidelines under the Water Resources Development Act, and other federal spending and activities relatedD.C. Water Resources Research Center Annual Technical Report FY 2009 D.C. Water Resources Research

  7. Energy Management Program atEnergy Management Program at Metropolitan Water District ofMetropolitan Water District of

    E-Print Network [OSTI]

    Keller, Arturo A.

    ;BackgroundBackground Climate change & global warming Greenhouse gas emissions Legislation ­ Governor's Executive Order S-3-05 ­ AB32: Reduction of GHG Emissions Climate change & global warming Greenhouse gas,385 GWh 2005 Metropolitan elect. usage = 1,940 GWh (0.7% of Calif.) ­ Enough electricity for 280,000 homes

  8. Switching coordination of distributed dc-dc converters for highly efficient photovoltaic power plants

    DOE Patents [OSTI]

    Agamy, Mohammed; Elasser, Ahmed; Sabate, Juan Antonio; Galbraith, Anthony William; Harfman Todorovic, Maja

    2014-09-09T23:59:59.000Z

    A distributed photovoltaic (PV) power plant includes a plurality of distributed dc-dc converters. The dc-dc converters are configured to switch in coordination with one another such that at least one dc-dc converter transfers power to a common dc-bus based upon the total system power available from one or more corresponding strings of PV modules. Due to the coordinated switching of the dc-dc converters, each dc-dc converter transferring power to the common dc-bus continues to operate within its optimal efficiency range as well as to optimize the maximum power point tracking in order to increase the energy yield of the PV power plant.

  9. Light-weight DC to very high voltage DC converter

    DOE Patents [OSTI]

    Druce, Robert L. (Union City, CA); Kirbie, Hugh C. (Dublin, CA); Newton, Mark A. (Livermore, CA)

    1998-01-01T23:59:59.000Z

    A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current.

  10. Light-weight DC to very high voltage DC converter

    DOE Patents [OSTI]

    Druce, R.L.; Kirbie, H.C.; Newton, M.A.

    1998-06-30T23:59:59.000Z

    A DC-DC converter capable of generating outputs of 100 KV without a transformer comprises a silicon opening switch (SOS) diode connected to allow a charging current from a capacitor to flow into an inductor. When a specified amount of charge has flowed through the SOS diode, it opens up abruptly; and the consequential collapsing field of the inductor causes a voltage and current reversal that is steered into a load capacitor by an output diode. A switch across the series combination of the capacitor, inductor, and SOS diode closes to periodically reset the SOS diode by inducing a forward-biased current. 1 fig.

  11. MANCHESTER METROPOLITAN UNIVERSITY ORGANISATION DEVELOPMENT & TRAINING

    E-Print Network [OSTI]

    the Equality & Diversity (E&D) and the Equality Impact Assessment (EIA) Teams are jointly running a Student Research with Disabled Students on Library & ICT Services Through EIA activity in the areas of Library in both of these departments were screened ­ with the EIA Team and policy owners ­ to assess the potential

  12. AC and DC power transmission

    SciTech Connect (OSTI)

    Not Available

    1985-01-01T23:59:59.000Z

    The technical and economic assessment of AC and DC transmission systems; long distance transmission, cable transmission, system inter-connection, voltage support, reactive compensation, stabilisation of systems; parallel operation of DC links with AC systems; comparison between alternatives for particular schemes. Design and application equipment: design, testing and application of equipment for HVDC, series and shunt static compensated AC schemes, including associated controls. Installations: overall design of stations and conductor arrangements for HVDC, series and shunt static AC schemes including insulation co-ordination. System analysis and modelling.

  13. DC to DC power converters and methods of controlling the same

    DOE Patents [OSTI]

    Steigerwald, Robert Louis; Elasser, Ahmed; Sabate, Juan Antonio; Todorovic, Maja Harfman; Agamy, Mohammed

    2012-12-11T23:59:59.000Z

    A power generation system configured to provide direct current (DC) power to a DC link is described. The system includes a first power generation unit configured to output DC power. The system also includes a first DC to DC converter comprising an input section and an output section. The output section of the first DC to DC converter is coupled in series with the first power generation unit. The first DC to DC converter is configured to process a first portion of the DC power output by the first power generation unit and to provide an unprocessed second portion of the DC power output of the first power generation unit to the output section.

  14. Transportation 2035 Longview Metropolitan Transportation Plan

    E-Print Network [OSTI]

    Longview Metropolitan Planning Organization

    2009-11-12T23:59:59.000Z

    Owen, MPO Director Melissa Bechtold, Transportation Planner Nalora Moser, Planning Technician MPO TECHNICAL COMMITTEE Karen Owen, City of Longview Fred Marquez, TXDOT-Austin Dale Spitz, TXDOT-Tyler District Debbie Sadler, City of White... Oak Will Buskell, TXDOT-Longview Area Rea Donna Jones, TXDOT-Atlanta District Margie McAllister, TCEQ-Austin Randy Redmond, TXDOT-Tyler District John Paul Jones, Harrison County Keith Bonds, City of Longview Steve Juneau, TXDOT-Marshall...

  15. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    main conclusions about off-grid markets for DC appliances,and power systems. Mature Off-Grid Markets for DC Appliancesapplications include off-grid residential, telecom, remote

  16. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    DC Conversion Loss Savings of Appliances Running on DirectConversion Loss Savings of Appliances Running on Direct DCrunning on AC and, in column B, the avoided AC-DC conversions losses

  17. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    DC solar-powered DC air-conditioning heat pump produced byRoom Air Conditioners Geothermal Heat Pumps Lighting-efficiency of an air source electric heat-pump water heater

  18. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    and energy-savings potential of using direct current (DC) generated by on-site renewablepotential, benefits, and barriers of using DC generated by on-site renewable energy

  19. DC systems with transformerless converters

    SciTech Connect (OSTI)

    Vithayathil, J.J.; Mittlestadt, W. [Bonneville Power Administration, Portland, OR (United States)] [Bonneville Power Administration, Portland, OR (United States); Bjoerklund, P.E. [ABB Power Systems AB, Ludvika (Sweden)] [ABB Power Systems AB, Ludvika (Sweden)

    1995-07-01T23:59:59.000Z

    A technical and economic feasibility study of HVDC systems without converter transformers is presented. The presentation includes proposed solutions to the drawback related to the absence of galvanic separation between the ac and dc systems, if the converter transformers are eliminated. The results show that HVDC systems without converter transformers are both technically and economically feasible. The cost savings can be substantial.

  20. FEDERAL COMMUNICATIONS COMMISSION Washington, DC

    E-Print Network [OSTI]

    Peha, Jon M.

    1 Before the FEDERAL COMMUNICATIONS COMMISSION Washington, DC GN Docket No. 14-28 In the Matter 15213-3890 peha@cmu.edu July 15, 2014 #12;2 Executive Summary It is important for the Commission situated entity. This policy would particularly benefit new entrepreneurial ventures. The Commission should

  1. Metropolitan Transportation Plan 2005-2030 

    E-Print Network [OSTI]

    Santa Fe Metropolitan Planning Organization

    1999-01-01T23:59:59.000Z

    are being impacted. The ?sub areas? include: Airport Road, NM 599, Richards Avenue/Rodeo Road and South St. Francis Drive. 6 The fifth meeting was a demonstration of the traffic modeling software (VISUM) presented by Robert Shull of PTV America. VISUM... be completed as well as the connection between Agua Fria Rd and County Road 62 at NM 599. ? Traffic calming measures are recommended for Lopez Lane. Public Comment Summary: South St. Francis Drive The comments on this topic were primarily about how to improve...

  2. FC/Battery Power Management for Electric Vehicle Based Interleaved dc-dc Boost Converter Topology

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    FC/Battery Power Management for Electric Vehicle Based Interleaved dc- dc Boost Converter Topology.fr Keywords Fuel cell System (FCS), Electric vehicle, Energy management, Interleaved Boost DC-DC Converter (FC for electric vehicle may not be feasible to satisfy the peak demand changes especially during accelerations

  3. Design and development of a DC-DC converter for a fuel cell inverter system

    E-Print Network [OSTI]

    Gopinath, Rajesh

    2001-01-01T23:59:59.000Z

    This thesis outlines the design and development of a DC-DC converter for a fuel cell inverter application. The proposed DC-DC converter was designed and tested at Texas A&M to meet the specifications laid down for the '2001 Future Energy Challenge...

  4. Analysis and design of a high power dc-dc converter

    E-Print Network [OSTI]

    Husain, Iqbal

    1989-01-01T23:59:59.000Z

    , for example in dc motors, traction motor control, marine hoist~, trolley cars, forklift trucks, mine haulers, dc voltage regulators etc. These choppers can be used for regeneration in the braking mode of a. dc motor pumping energy back to the system.... The elements of a dc-dc SP C are shown in figure 1. 2. The output voltage is usually regulated by pulse width modulation (PAVM) techniques. Input + V, DC Chopper Output V, Control Amp. V, + Ref. Fig. 1. 2 Block diagram of a SPC dc chopper...

  5. Ozone production rate and hydrocarbon reactivity in 5 urban areas: A cause of high ozone concentration in Houston

    E-Print Network [OSTI]

    petrochemical complexes in the world. As a consequence the concentration of O3 in the Houston metropolitan area from nearby petrochemical facili- ties. A comparison between Houston and 4 other cities (Nashville, TN

  6. Graphite electrode DC arc furnace. Innovative technology summary report

    SciTech Connect (OSTI)

    NONE

    1999-05-01T23:59:59.000Z

    The Graphite Electrode DC Arc Furnace (DC Arc) is a high-temperature thermal process, which has been adapted from a commercial technology, for the treatment of mixed waste. A DC Arc Furnace heats waste to a temperature such that the waste is converted into a molten form that cools into a stable glassy and/or crystalline waste form. Hazardous organics are destroyed through combustion or pyrolysis during the process and the majority of the hazardous metals and radioactive components are incorporated in the molten phase. The DC Arc Furnace chamber temperature is approximately 593--704 C and melt temperatures are as high as 1,500 C. The DC Arc system has an air pollution control system (APCS) to remove particulate and volatiles from the offgas. The advantage of the DC Arc is that it is a single, high-temperature thermal process that minimizes the need for multiple treatment systems and for extensive sorting/segregating of large volumes of waste. The DC Arc has the potential to treat a wide range of wastes, minimize the need for sorting, reduce the final waste volumes, produce a leach resistant waste form, and destroy organic contaminants. Although the DC arc plasma furnace exhibits great promise for treating the types of mixed waste that are commonly present at many DOE sites, several data and technology deficiencies were identified by the Mixed Waste Focus Area (MWFA) regarding this thermal waste processing technique. The technology deficiencies that have been addressed by the current studies include: establishing the partitioning behavior of radionuclides, surrogates, and hazardous metals among the product streams (metal, slag, and offgas) as a function of operating parameters, including melt temperature, plenum atmosphere, organic loading, chloride concentration, and particle size; demonstrating the efficacy of waste product removal systems for slag and metal phases; determining component durability through test runs of extended duration, evaluating the effect of feed composition variations on process operating conditions and slag product performance; and collecting mass balance and operating data to support equipment and instrument design.

  7. USCOMM-WB-DC PRELIMZNARY REPORT OH HURRICANE DAISY

    E-Print Network [OSTI]

    QC 945.2 .D3 H8 1958 c.2 #12;#12;USCOMM-WB-DC #12;PRELIMZNARY REPORT OH HURRICANE DAISY AWGUST 24-29, 1958 Hurricane "Daisy", intense but small in area, was detected as a tropical storm about 300 miles into a hurricane on August 25. A u g u s t 27 it drifted very slowly northward. coast increased. the Atlantic off

  8. Areas Participating in the Oxygenated Gasoline Program (Released in the STEO July 1999)

    Reports and Publications (EIA)

    1999-01-01T23:59:59.000Z

    Section 211(m) of the Clean Air Act (42 U.S.C. 7401-7671q) requires that gasoline containing at least 2.7% oxygen by weight is to be used in the wintertime in those areas of the county that exceed the carbon monoxide National Ambient Air Quality Standards (NAAQS). The winter oxygenated gasoline program applies to all gasoline sold in the larger of the Consolidated Metropolitan Statistical Area (CMSA) or Metropolitan Statistical Area (MSA) in which the nonattainment area is located.

  9. Exploring the Raft River geothermal area, Idaho, with the dc...

    Open Energy Info (EERE)

    GEOPHYSICAL SURVEYS; NORTH AMERICA; PACIFIC NORTHWEST REGION; PHYSICAL PROPERTIES; USA; WELLS Authors Zohdy, A.A.R.; Jackson, D.B.; Bisdorf and R.J. Published Journal...

  10. DC Resistivity Survey (Schlumberger Array) At Raft River Geothermal Area

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew|CoreCpWingCushing,DA (Distribution

  11. DC Resistivity Survey (Schlumberger Array) At Coso Geothermal Area (1977) |

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs andCrops Ltd Jump to: navigation,

  12. Active dc filter for HVDC systems

    SciTech Connect (OSTI)

    Zhang, W. (Royal Inst. of Tech., Stockholm (Sweden)); Asplund, G.

    1994-01-01T23:59:59.000Z

    This article is a case history of the installation of active dc filters for high-performance, low-cost harmonics filtering at the Lindome converter station in the Konti-Skan 2 HVDC transmission link between Denmark and Sweden. The topics of the article include harmonics, interference, and filters, Lindome active dc filter, active dc filter design, digital signal processor, control scheme, protection and fault monitoring, and future applications.

  13. Computer-aided optimization of DC/DC converters for automotive applications

    E-Print Network [OSTI]

    Neugebauer, Timothy C.

    This paper investigates computer-aided optimization of DC/DC converters, with a focus on converters for dual-voltage automotive electrical systems. A new CAD optimization approach based on Monte Carlo search methods is ...

  14. High efficiency resonant dc/dc converter for solar power applications

    E-Print Network [OSTI]

    Inam, Wardah

    2013-01-01T23:59:59.000Z

    This thesis presents a new topology for a high efficiency dc/dc resonant power converter that utilizes a resistance compression network to provide simultaneous zero voltage switching and near zero current switching across ...

  15. New Architectures for Radio-Frequency DC-DC Power Conversion

    E-Print Network [OSTI]

    Rivas, Juan M.

    This document proposes two new architectures for switched-mode dc–dc power conversion. The proposed architectures enable dramatic increases in switching frequency to be realized while preserving features critical in practice, ...

  16. Optimization of Integrated Transistors for Very High Frequency DC-DC Converters

    E-Print Network [OSTI]

    Sagneri, Anthony D.

    This paper presents a method to optimize integrated lateral double-diffused MOSFET transistors for use in very high frequency (VHF, 30-300 MHz) dc-dc converters. A transistor model valid at VHF switching frequencies is ...

  17. DC to DC power conversion module for the all-electric ship

    E-Print Network [OSTI]

    Gray, Weston L

    2011-01-01T23:59:59.000Z

    The MIT end to end electric ship model is being developed to study competing electric ship designs. This project produced a model of a Power Conversion Module (PCM)- 4, DC-to-DC converter which interfaces with the MIT ...

  18. Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications

    E-Print Network [OSTI]

    Liberzon, Daniel

    Reliability Assessment of Fault-Tolerant Dc-Dc Converters for Photovoltaic Applications Sairaj V in photovoltaic energy processing applications is presented. The proposed approach acknowledges the influence through several case studies. Index Terms-- Markov reliability modeling, photovoltaic systems, power

  19. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    resistance heating and incandescent lighting, the technologyresistance heating or by DC-favoring heat pump technology (technology (electronic fluorescent and LED). Similarly, heating

  20. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    48V DC , depending on battery bank configuration. Lifetime:Characteristics: Lead-acid battery banks are composed ofto produce the desired battery bank voltage. Typical battery

  1. The capacitively coupled converter (Cł) for high power DC-DC conversion 

    E-Print Network [OSTI]

    Khan, Shahriar

    1992-01-01T23:59:59.000Z

    THE CAPACITIVELY COUPLED CONVERTER (C3) FOR HIGH POWER DC-DC CONVERSION A Thesis by SHAHRIAR KHAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER... OF SCIENCE May 1992 Major Subject: Electrical Engineering THE CAPACITIVELY COUPLED CONVERTER (Cs) FOR HIGH POWER DC-DC CONVERSION A Thesis by SHAHRIAR KHAN Approved as to style and content by: Mehrdad Ehsani (Chair of Committee) Prasad Enjeti...

  2. Digitally Controlled Distributed Multiphase DC-DC Converters Xu Zhang, Luca Corradini and Dragan Maksimovic

    E-Print Network [OSTI]

    Digitally Controlled Distributed Multiphase DC-DC Converters Xu Zhang, Luca Corradini and Dragan, corradin, maksimov}@colorado.edu Abstract -- This paper describes a distributed master-slave multiphase DC V-to-12 V input, 1.3 V, 20 A output two-phase synchronous buck converter. Index Terms-- Multiphase

  3. DC-based magnetic field controller

    DOE Patents [OSTI]

    Kotter, D.K.; Rankin, R.A.; Morgan, J.P.

    1994-05-31T23:59:59.000Z

    A magnetic field controller is described for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a Hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage. 1 fig.

  4. DC-based magnetic field controller

    DOE Patents [OSTI]

    Kotter, Dale K. (Shelley, ID); Rankin, Richard A. (Ammon, ID); Morgan, John P,. (Idaho Falls, ID)

    1994-01-01T23:59:59.000Z

    A magnetic field controller for laboratory devices and in particular to dc operated magnetic field controllers for mass spectrometers, comprising a dc power supply in combination with improvements to a hall probe subsystem, display subsystem, preamplifier, field control subsystem, and an output stage.

  5. Efficient detection of contagious outbreaks in massive metropolitan encounter networks

    E-Print Network [OSTI]

    Sun, Lijun; Lee, Der-Horng; Cebrian, Manuel

    2014-01-01T23:59:59.000Z

    Physical contact remains difficult to trace in large metropolitan networks, though it is a key vehicle for the transmission of contagious outbreaks. Co-presence encounters during daily transit use provide us with a city-scale time-resolved physical contact network, consisting of 1 billion contacts among 3 million transit users. Here, we study the advantage that knowledge of such co-presence structures may provide for early detection of contagious outbreaks. We first examine the "friend sensor" scheme --- a simple, but universal strategy requiring only local information --- and demonstrate that it provides significant early detection of simulated outbreaks. Taking advantage of the full network structure, we then identify advanced "global sensor sets", obtaining substantial early warning times savings over the friends sensor scheme. Individuals with highest number of encounters are the most efficient sensors, with performance comparable to individuals with the highest travel frequency, exploratory behavior and ...

  6. High voltage DC power supply

    DOE Patents [OSTI]

    Droege, Thomas F. (Batavia, IL)

    1989-01-01T23:59:59.000Z

    A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively.

  7. High voltage DC power supply

    DOE Patents [OSTI]

    Droege, T.F.

    1989-12-19T23:59:59.000Z

    A high voltage DC power supply having a first series resistor at the output for limiting current in the event of a short-circuited output, a second series resistor for sensing the magnitude of output current, and a voltage divider circuit for providing a source of feedback voltage for use in voltage regulation is disclosed. The voltage divider circuit is coupled to the second series resistor so as to compensate the feedback voltage for a voltage drop across the first series resistor. The power supply also includes a pulse-width modulated control circuit, having dual clock signals, which is responsive to both the feedback voltage and a command voltage, and also includes voltage and current measuring circuits responsive to the feedback voltage and the voltage developed across the second series resistor respectively. 7 figs.

  8. AVTA: Battery Testing - DC Fast Charging's Effects on PEV Batteries...

    Energy Savers [EERE]

    DC Fast Charging's Effects on PEV Batteries AVTA: Battery Testing - DC Fast Charging's Effects on PEV Batteries The Vehicle Technologies Office's Advanced Vehicle Testing Activity...

  9. Vehicle Technologies Office Merit Review 2014: DC Fast Charging...

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

    DC Fast Charging Effects on Battery Life and EVSE Efficiency and Security Testing Vehicle Technologies Office Merit Review 2014: DC Fast Charging Effects on Battery Life and EVSE...

  10. Planners and the Pork Barrel: Metropolitan Engagement in and Resistance to Congressional Transportation Earmarking

    E-Print Network [OSTI]

    Sciara, Gian-Claudia

    2009-01-01T23:59:59.000Z

    Tri-State Regional Planning Commission, which included metropolitan countiesCounty Department of Transportation Olivia Clark Executive Director of Governmental Affairs Tri-tri-state MPO in 1982, NYMTC has consisted of nine voting members, representing county

  11. Urban growth pattern and sustainable development: a comparative study of municipalities in the Seoul Metropolitan Region

    E-Print Network [OSTI]

    Paek, Seunggeun

    2006-10-30T23:59:59.000Z

    The main purpose of this study was to obtain a better understanding of the impact of urban growth and change on sustainability based on a comparative study of municipalities comprising Gyeonggi Province within the Seoul Metropolitan Region, Korea...

  12. Analysis of The Housing Market in the Metropolitan Areas in the United States

    E-Print Network [OSTI]

    Li, Yarui

    2013-12-04T23:59:59.000Z

    that economics dominates geography in terms of differentiating housing markets (Gyourko and Voith, 1992; Jud and Winkler, 2002; Chan, Ng and Ramchand, 2012). House prices are found to facilitate classifying homogeneous housing market and so are other elements... of attributes varies by geographical region and over time with property size and economic and demographical attributes being the key variables explaining asking price formation. The paper by Capozza, Hendershott, Mack and Mayer (2002) explores...

  13. Mobility 2030: The Metropolitan Transportation Plan for the Dallas-Fort Worth Area 2009 Amendment

    E-Print Network [OSTI]

    North Central Texas Council of Governments

    2009-04-09T23:59:59.000Z

    the airports via DART light rail. DCTA will connect to the system in Carrollton. ? Review surface access to aviation and related changes over time. St udy alternative access and congestion scenarios at commercial airports based on alternative air travel... Dallas/Fort Worth International Airport Kathryn Wilemon Councilm e m b e r, City of Arlingt on Michael Morris, P.E. Director of Transportation, NCTC OG Surface Transportation Technical Committee Jim Sparks, Chair City of Grand Prairi e...

  14. An ozone episode in the Philadelphia metropolitan area Lawrence I. Kleinman,1

    E-Print Network [OSTI]

    and Structure: Pollution--urban and regional (0305); 0365 Atmospheric Composition and Structure: Troposphere follows population density, there are locations within the corridor with a concentration of electric and the Ohio River Valley, are large coal-fired power plants with high emissions of SO2 and NOx. Meteorological

  15. Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    Methanol Ethanol Acetone MEK MTBE CO Methane UCI UCI TOGA/methyl tertiary butyl ether (MTBE), and toluene all ratioedthe observed decay. For MTBE, also a species that is not

  16. An Analysis of the Impacts of British Transport Reforms on Transit Integration in the Metropolitan Areas

    E-Print Network [OSTI]

    Rivasplata, Charles Richard

    2006-01-01T23:59:59.000Z

    and C. Nash, 1995. Bus deregulation: ten years on, TransportFN Spon. ________, 1996. Deregulation and privatization: theand N. Topham (Eds. ), Bus Deregulation and Privatisation,

  17. Geographically varying associations between personality and life satisfaction in the London metropolitan area

    E-Print Network [OSTI]

    Jokela, Markus; Rentfrow, Peter J.; Bleidorn, Wiebke; Lamb, Michael E.; Gosling, Samuel D.

    2015-01-12T23:59:59.000Z

    individual dispositions and neighborhood characteristics. Methods Participants Participants were from the Big Personality Test online survey advertized and hosted by the British Broadcasting Corporation (BBC) on its Lab UK website (https://ssl... TC (1985) Urbanism and tolerance: A test of some hypotheses drawn from Wirth and Stouffer. American Sociological Review. 17. uk MC ed. The Busiest Stations on the London Underground (mapsdata.co.uk) Available at: http://www.mapsdata.co.uk/portfolio...

  18. Executive Summary The Morgantown metropolitan statistical area (MSA) continued to expand in 2011, adding jobs

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    job gains in natural resources and mining (new coal mine and continued development of the Marcellus. In addition, state and federal budgets are likely to tighten during the forecast, putting pressure on spending OF BUSINESS AND ECONOMIC RESEARCH COLLEGE OF BUSINESS AND ECONOMICS WEST VIRGINIA UNIVERSITY www

  19. A comparative study of ozone production in five U.S. metropolitan areas

    E-Print Network [OSTI]

    olefins are coemitted from petrochemical facilities leading to the highest P(O3)s of the five cities

  20. Real-time Air Quality Monitoring Through Mobile Sensing in Metropolitan Areas

    E-Print Network [OSTI]

    Iftode, Liviu

    . General Terms Measurement, Design, Experimentation, Human Factors. Keywords Air Quality, Pollution, Urban levels in the urban and suburban settings. According to the US EPA [3], the six common air pollutants. These are called the criteria pollutants and thus are required to be measured to tell us how healthy the air

  1. Chemical evolution of volatile organic compounds in the outflow of the Mexico City Metropolitan area

    E-Print Network [OSTI]

    2010-01-01T23:59:59.000Z

    C-130 T0 T1 G1 Ethane Propane i-Butane n-Butane i-Pentane n-ppbv) Ethane Ethene Ethyne Propane Propene i-Butane n-Butanee.g. , ethane, ethene, propane, propane, methanol, ethanol,

  2. Modeling the Dynamics of Desakota Regions: Global - Local Nexus in the Taipei Metropolitan Area

    E-Print Network [OSTI]

    Wu, Bing-Sheng

    2010-10-12T23:59:59.000Z

    Since the 1970s, Asia has experienced rapid urbanization processes, which are distinct from U.S. society, and the direction of Asian urbanization is more strongly affected by economic globalization. The desakota model, proposed by McGee and Ginsburg...

  3. publication 420-050 Learning to Live with Coyotes in Metropolitan Areas

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    good chance for survival here. Being general- ists, they eat plants, animals, and even garbage. However. Children should tell an adult if they see one. 4. Take your garbage can to the curb on the morning of your

  4. Technology and policy options for reducing industrial air pollutants in the Mexico City Metropolitan Area

    E-Print Network [OSTI]

    Vijay, Samudra, 1968-

    2005-01-01T23:59:59.000Z

    Technology plays an important role in dealing with air pollution and other environmental problems faced by developing and developed societies. This research examines if technological solutions alone, such as end-of-pipe ...

  5. Vulnerability of the New York City Metropolitan Area to Coastal Hazards,

    E-Print Network [OSTI]

    moved from a manufacturing to a service industry-based economy. Mid-town and Lower Manhattan are two on Long Island, NY, and the north- ern New Jersey shore. Beaches and coastal wetlands provide recreational at or near sea level. Major coastal urban centers have long been vulnerable to natural hazards, such as storm

  6. An Analysis of the Impacts of British Transport Reforms on Transit Integration in the Metropolitan Areas

    E-Print Network [OSTI]

    Rivasplata, Charles Richard

    2006-01-01T23:59:59.000Z

    contrast to many other cities with the smart card system ofthe three case cities. Fare integration: transit smart cardsonly city in the country to have introduced a transit smart

  7. Public perceptions of, and attitudes toward, crime in the parks of a major metropolitan area

    E-Print Network [OSTI]

    Conway, Kenneth Lee

    1980-01-01T23:59:59.000Z

    , Davis Chairman of Advisory Committee: Dr. John L. Crompton Research was conducted to examine whether the perception of high crime and illegal activity levels in Austin parks was related to non- use or low use of these parks. An attempt was made... to determine which types of illegal activities Austin citizens were most sensitive to and how often they perceived these illegal activities to occur in Austin parks. Also, those crimes that most discouraged visitation were iden- tified, along with crime...

  8. Formation of semivolatile inorganic aerosols in the Mexico City Metropolitan Area during the MILAGRO campaign

    E-Print Network [OSTI]

    Karydis, V. A.

    One of the most challenging tasks for chemical transport models (CTMs) is the prediction of the formation and partitioning of the major semi-volatile inorganic aerosol components (nitrate, chloride, ammonium) between the ...

  9. Emission Testing of Washington Metropolitan Area Transit Authority (WMATA) Natural Gas and Diesel Transit Buses

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville Power AdministrationField Campaign:INEAWater UseCElizabethTwo States CARLSBAD,Emilio

  10. Washington Metropolitan Area Transit Authority: Biodiesel Fuel Comparison Final Data Report

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsing Maps1DOE AwardsD ContractBOE Reserve

  11. DC High School Science Bowl Regionals

    Broader source: Energy.gov [DOE]

    This event is the Washington, D.C. High School Regional competition for the US National Science Bowl. The regional competition is run by the Office of Economic Impact and Diversity, and the...

  12. DC readout experiment in Enhanced LIGO

    E-Print Network [OSTI]

    Fricke, Tobin T

    The two 4 km long gravitational wave detectors operated by the Laser Interferometer Gravitational-wave Observatory (LIGO) were modified in 2008 to read out the gravitational wave channel using the DC readout form of homodyne ...

  13. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    www.lunera.com/. Nextek Power Systems. [cited 2010 Dec];data_files/. DC Power Systems. Wholesale Price List. [citedDUS103927W.pdf. Princeton Power Systems. GTIB-480-100 Grid-

  14. American Institute of Aeronautics and Astronautics Active System Identification of a DC-DC Converter Using

    E-Print Network [OSTI]

    American Institute of Aeronautics and Astronautics 1 Active System Identification of a DC and Computer Engineering, UCB 425. #12;American Institute of Aeronautics and Astronautics 2 analysis10

  15. Federal Government Congressional Budget Office, Budget Analysis Division Washington, DC

    E-Print Network [OSTI]

    Shyy, Wei

    Charlotte, NC Gallaher Kazakhstan, Security & Brand Integrity Almaty Oblast, Kazakhstan GMMB Washington, DC

  16. Hydrogen Storage Systems Analysis Working Group Meeting Argonne DC Offices

    E-Print Network [OSTI]

    Hydrogen Storage Systems Analysis Working Group Meeting Argonne DC Offices L'Enfant Plaza, Washington, DC December 4, 2007 SUMMARY REPORT Compiled by Romesh Kumar Argonne National Laboratory Working Group Meeting December 4, 2007 Argonne DC Offices, L'Enfant Plaza, Washington, DC Meeting

  17. Near Time-Optimal Transient Response in DC-DC Buck Converters Taking into Account the Inductor Current Limit

    E-Print Network [OSTI]

    -load transient responses [1-15]. In its simplest form, the TOC responds to a step load change with a singleNear Time-Optimal Transient Response in DC-DC Buck Converters Taking into Account the Inductor transient response of a DC-DC buck converter. The concept of current- limited, time-optimal control (CL

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

    E-Print Network [OSTI]

    of the switch conduction and turn-off losses achieved by an energy recovery secondary clamp circuit an improved PSFB DC-DC converter using only a modified energy recovery clamp circuit attached at the secondaryPhase-Shifted Full Bridge DC-DC Converter with Energy Recovery Clamp and Reduced Circulating

  19. A DC-DC Converter-Based PEM Fuel Cell System Emulator

    E-Print Network [OSTI]

    Boyer, Edmond

    power supplies. Fuel cell systems are characterized by high costs and complex auxiliary devices still impose some drawbacks: the cost of fuel cell system tests are expensive (e.g., hydrogenA DC-DC Converter-Based PEM Fuel Cell System Emulator Daoud Rezzak, Farid Khoucha, Mohamed

  20. DC's Marble ceiling : urban height and its regulation in Washington, DC

    E-Print Network [OSTI]

    Trueblood, Andrew Tyson

    2009-01-01T23:59:59.000Z

    Washington, DC has a unique urban form that is the result of a century-old law. Through the narrow lens of DC's height limit, I survey a range of topics related to urban height, starting with a review of its history of ...

  1. Wide input range DC-DC converter with digital control scheme

    E-Print Network [OSTI]

    Harfman Todorovic, Maja

    2006-04-12T23:59:59.000Z

    In this thesis analysis and design of a wide input range DC-DC converter is proposed along with a robust power control scheme. The proposed converter and its control is designed to be compatible to a fuel cell power source, which exhibits 2...

  2. Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans

    E-Print Network [OSTI]

    Jackson, Scott A.

    Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Expected yield per acre2 118 126 39 62 23 149 158 49 70 29

  3. Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans

    E-Print Network [OSTI]

    Cont. Rot. Rot. DC Cont. Rot. Rot. DC Cont. Rot. Rot. DC Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Corn Corn Beans Wheat Beans Expected yield per acre2 119 127 39 62 23 149 159 49 70 29

  4. New Experimental Data in DC745U

    SciTech Connect (OSTI)

    Ortiz-Acosta, Denisse [Los Alamos National Laboratory; Cady, Carl [Los Alamos National Laboratory; Densmore, Crystal [Los Alamos National Laboratory

    2012-06-18T23:59:59.000Z

    The objectives of this project are: (1) study the molecular and mechanical properties of DC745U - (a) DC745U is a silicone elastomer used in several weapons systems, (b) depending on their chemistry and formulation, polymers can be susceptible to damage and failures due to weak chemical linkages and physical interactions, (c) inefficient production processes can generate heterogeneities throughout the material that can contribute negatively to the overall performance and lifetime of the polyer, (d) aging, long-term thermal and radioactive conditions, and mechanical strains can affect the materials network structure and contribute to the degradation of the production; (2) characterization of DC745U materials cured under different conditions to determine possible differences to the polymer structure; and (3) this work is relevant to mission-critical programs and for supporting programmatic work for weapon research.

  5. Thermoelectric DC conductivities from black hole horizons

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2014-10-14T23:59:59.000Z

    An analytic expression for the DC electrical conductivity in terms of black hole horizon data was recently obtained for a class of holographic black holes exhibiting momentum dissipation. We generalise this result to obtain analogous expressions for the DC thermoelectric and thermal conductivities. We illustrate our results using some holographic Q-lattice black holes as well as for some black holes with linear massless axions, in both $D=4$ and $D=5$ bulk spacetime dimensions, which include both spatially isotropic and anisotropic examples. We show that some recently constructed ground states of holographic Q-lattices, which can be either electrically insulating or metallic, are all thermal insulators.

  6. Design and analysis of a zero-voltage switching scheme for a dc- to-dc converter

    E-Print Network [OSTI]

    Arun, G.

    1992-01-01T23:59:59.000Z

    5S 59 VITA . 65 I. IST OF FICI;RES FIGURE Page Linear versus switch-mode power convers&on Components of a switch-mode dc-to-dc converter 3 A typical dc-to-dc converter system Basic buck converter Basic boost converter Basic buck...-boost converter 7 One leg of a, dc-to-dc converter. Turn-on and turn-off scenartos in switch-mode operation. 16 10 Switching loci in the ur ? ir plane. Circuit for. zero-voltage sw&tching. . Mode 1 17 90 Mode? Mode I Mode 5 oo 93 Typical voltage...

  7. achyrocline satureioides dc: Topics by E-print Network

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

    and DC, microgrid, with its definition as a local grid that comprises distributed generation, energy storage systems to the frequency in the AC bulk grid, the DC voltage in the...

  8. DC Students Flex Their Mental Muscles in Regional Science Bowl...

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

    DC Students Flex Their Mental Muscles in Regional Science Bowl Competition DC Students Flex Their Mental Muscles in Regional Science Bowl Competition February 23, 2015 - 3:12pm...

  9. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, Bernard T. (Livermore, CA); Dreifuerst, Gary R. (Livermore, CA); Post, Richard F. (Walnut Creek, CA)

    1998-01-01T23:59:59.000Z

    A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An "inside-out" design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then "switched" or "commutated" to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives.

  10. Halbach array DC motor/generator

    DOE Patents [OSTI]

    Merritt, B.T.; Dreifuerst, G.R.; Post, R.F.

    1998-01-06T23:59:59.000Z

    A new configuration of DC motor/generator is based on a Halbach array of permanent magnets. This motor does not use ferrous materials so that the only losses are winding losses and losses due to bearings and windage. An ``inside-out`` design is used as compared to a conventional motor/generator design. The rotating portion, i.e., the rotor, is on the outside of the machine. The stationary portion, i.e., the stator, is formed by the inside of the machine. The rotor contains an array of permanent magnets that provide a uniform field. The windings of the motor are placed in or on the stator. The stator windings are then ``switched`` or ``commutated`` to provide a DC motor/generator much the same as in a conventional DC motor. The commutation can be performed by mechanical means using brushes or by electronic means using switching circuits. The invention is useful in electric vehicles and adjustable speed DC drives. 17 figs.

  11. FEDERAL COMMUNICATIONS COMMISSION Washington, DC 20554

    E-Print Network [OSTI]

    Bove Jr., V. Michael

    FCC 96­207 Before the FEDERAL COMMUNICATIONS COMMISSION Washington, DC 20554 In the Matter to the advancement of digital television and related technologies by the Federal Communications Commission, its 617­253­0334, fax 617­258­6264 vmb@media.mit.edu #12; EXECUTIVE SUMMARY The Federal Communications

  12. Energy Training Session for DC Elementary School Teachers

    Broader source: Energy.gov [DOE]

    Are you an elementary school teacher in Washington, DC, looking for creative ideas to introduce energy curriculum to your students?

  13. DraftApril 7, 2009 Features of Climate-Smart Metropolitan Economies

    E-Print Network [OSTI]

    Draft­April 7, 2009 Chapter 8 Features of Climate-Smart Metropolitan Economies Marilyn A. Brown-carbon climate-smart leadership that is required to meet the nation's targets and timetables necessary to avoid emissions of carbon dioxide.) Residential and commercial buildings account for 39 percent of the carbon

  14. Computer Lab Software Installation Policy for the Metropolitan Instructional Support Laboratory

    E-Print Network [OSTI]

    Computer Lab Software Installation Policy for the Metropolitan Instructional Support Laboratory Laboratory (MISL) provides computer lab space for faculty, staff and student use as individuals or in classes on lab computers. This policy applies to both stationary and portable lab computers. Policy: Scenario 1

  15. ERASMUS 2011-2012. . Manchester Metropolitan University UK MANCHES 04 3 18

    E-Print Network [OSTI]

    Kouroupetroglou, Georgios

    ERASMUS 2011-2012. . . / . Manchester Metropolitan University UK MANCHES 04 3 18 PORTO 02 2 20 . University of Presov SK PRESOV 01 2 8 . Hacettepe University TR ANKARA 03 2 10 . University of Eastern Finland SF KUOPIO 12 4 18 Universitat fur Bodenkulrur Wien (BOKU) A WIEN 03 3 18

  16. ERASMUS 2011-2012. . Manchester Metropolitan University UK MANCHES 04 3 18

    E-Print Network [OSTI]

    Kouroupetroglou, Georgios

    ERASMUS 2011-2012. 1 . Manchester Metropolitan University UK MANCHES 04 3 18 PORTO 02 2 20 . University of Presov SK PRESOV 01 2 8 . Hacettepe University TR ANKARA 03 2 10 . University of Eastern Finland SF KUOPIO 12 4 18 Universitat fur Bodenkulrur Wien (BOKU) A WIEN 03 3 18

  17. BNY Mellon -Leading the way across the globe Manchester Metropolitan University

    E-Print Network [OSTI]

    BNY Mellon - Leading the way across the globe Manchester Metropolitan University 2012 #12;Page 2 business Established The Bank of New York Securities Co. Japan, Ltd. Established BNY Luxembourg Acquired) Luxembourg A radical increase in product breadth and global reach Early adopters of mainframe technology 1900

  18. Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    Aalborg Universitet Hierarchical Control for Multiple DC Microgrids Clusters Shafiee, Qobad Control for Multiple DC Microgrids Clusters. I E E E Transactions on Energy Conversion. General rights, J. C. Vasquez, and J. M. Guerrero, "Hierarchical Control for Multiple DC-Microgrids Clusters," IEEE

  19. Transportation YOU 2013 DC Youth Summit WTS Transportation YOU

    E-Print Network [OSTI]

    Minnesota, University of

    Transportation YOU 2013 DC Youth Summit WTS Transportation YOU CTS Research Conference May 21, 2014 Lisa Rasmussen, WTS / Kimley-Horn and Associates, Inc #12;Transportation YOU 2013 DC Youth SummitTransportation YOU 2013 DC Youth Summit Agenda What is Transportation YOU? Transportation YOU ­ WTS Local Chapter

  20. D.C. Water Resources Research Center Annual Technical Report

    E-Print Network [OSTI]

    D.C. Water Resources Research Center Annual Technical Report FY 2007 D.C. Water Resources Research of the District of Columbia (DC) Water Resources Research Institute (the Institute) for the period of March 1 relevant water resources research results and transfer information to assist policy makers and residents

  1. Low Power DC-DC Converters and a Low Quiescent Power High PSRR Class-D Audio Amplifier

    E-Print Network [OSTI]

    Torres, Joselyn

    2013-12-03T23:59:59.000Z

    High-performance DC-DC voltage converters and high-efficient class-D audio amplifiers are required to extend battery life and reduce cost in portable electronics. This dissertation focuses on new system architectures and design techniques...

  2. Low Power DC-DC Converters and a Low Quiescent Power High PSRR Class-D Audio Amplifier 

    E-Print Network [OSTI]

    Torres, Joselyn

    2013-12-03T23:59:59.000Z

    High-performance DC-DC voltage converters and high-efficient class-D audio amplifiers are required to extend battery life and reduce cost in portable electronics. This dissertation focuses on new system architectures and design techniques...

  3. New leading/trailing edge modulation strategies for two-stage AC/DC PFC adapters to reduce DC-link capacitor ripple current 

    E-Print Network [OSTI]

    Sun, Jing

    2007-09-17T23:59:59.000Z

    AC/DC adapters mostly employ two-stage topology: Power Factor Correction (PFC) pre-regulation stage followed by an isolated DC/DC converter stage. Low power AC/DC adapters require a small size to be competitive. Among their components, the bulk DC...

  4. DC side filters for multiterminal HVDC systems

    SciTech Connect (OSTI)

    Shore, N.L.; Adamson, K.; Bard, P. [and others] [and others

    1996-10-01T23:59:59.000Z

    Multiterminal HVDC systems present challenges in the specification and design of suitable dc side filtering. This document examines the existing experience and addresses the particular technical problems posed by multiterminal systems. The filtering requirements of small taps are discussed, as is the potential use of active filters. Aspects of calculation and design are considered and recommendations made to guide the planners and designers of future multiterminal schemes.

  5. The effectiveness of jobs-housing balance as a strategy for reducing traffic congestion: a study of metropolitan Bangkok 

    E-Print Network [OSTI]

    Lobyaem, Sonchai

    2006-10-30T23:59:59.000Z

    Bangkok is widely known for its severe traffic congestion. The Thai government advocates the concept of jobs and housing balance (JHB) as a strategy for reducing traffic congestion in Metropolitan Bangkok. The basic idea ...

  6. The effectiveness of jobs-housing balance as a strategy for reducing traffic congestion: a study of metropolitan Bangkok

    E-Print Network [OSTI]

    Lobyaem, Sonchai

    2006-10-30T23:59:59.000Z

    Bangkok is widely known for its severe traffic congestion. The Thai government advocates the concept of jobs and housing balance (JHB) as a strategy for reducing traffic congestion in Metropolitan Bangkok. The basic idea is to decentralize the jobs...

  7. The 2005 - 2030 Harlingen-San Benito Metropolitan Transportation Plan

    E-Print Network [OSTI]

    Harlingen-San Benito Metropolitan Planning Organization

    2004-12-29T23:59:59.000Z

    construction program for the MPO. It lists what projects will be constructed in the MPO urbanized area and in what fiscal year they will be let. (Let means when the contract will be awarded.) The TIP is updated every two fiscal years (FY 1999, 2001, 2003... the MPO study area experienced significant increases in population, and increased population and growth are projected to continue through the 25-year study period for the Harlingen-San Benito MPO and the Lower Rio Grande Valley as a whole. 1...

  8. Undergraduate Internship Program -National Clandestine Service

    E-Print Network [OSTI]

    Meyers, Steven D.

    Undergraduate Internship Program - National Clandestine Service Work Schedule: Full Time Salary: $39,752 Location: Washington, DC metropolitan area Applications for internships starting in Summer arm of the CIA. The NCS Undergraduate Internship Program offers a limited number of talented

  9. Copy right:Must ask the author to use this template Tolessa Deksissa (tdeksissa@udc.edu), July 31, 2008www.udc.edu/wrri

    E-Print Network [OSTI]

    District of Columbia, University of the

    Copy right:Must ask the author to use this template Tolessa Deksissa (tdeksissa@udc.edu), July 31 quality data in the metropolitan Washington, D.C. area, as reported by the U.S. Geological Survey (USGS

  10. A High Power Density DC-DC Converter for Distributed PV Architectures

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Song Chi; Ahmed Elasser; Maja Harfman-Todorovic; Yan Jiang; Frank Mueller; Fengfeng Tao

    2012-06-01T23:59:59.000Z

    In order to maximize solar energy harvesting capabilities, power converters have to be designed for high efficiency and good MPPT and voltage/current performance. When many converters are used in distributed systems, power density also becomes an important factor as it allows for simpler system integration. In this paper a high power density string dc-dc converter suitable for distributed medium to large scale PV installation is presented. A simple partial power processing topology, implemented with all silicon carbide devices provides high efficiency as well as high power density. A 3.5kW, 100kHz converter is designed and tested to verify the proposed methods.

  11. DC-DC Converter Topology Assessment for Large Scale Distributed Photovoltaic Plant Architectures

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Juan A. Sabate; Robert L. Steigerwald; Yan Jiang; Somasundaram Essakiappan

    2011-07-01T23:59:59.000Z

    Distributed photovoltaic (PV) plant architectures are emerging as a replacement for the classical central inverter based systems. However, power converters of smaller ratings may have a negative impact on system efficiency, reliability and cost. Therefore, it is necessary to design converters with very high efficiency and simpler topologies in order not to offset the benefits gained by using distributed PV systems. In this paper an evaluation of the selection criteria for dc-dc converters for distributed PV systems is performed; this evaluation includes efficiency, simplicity of design, reliability and cost. Based on this evaluation, recommendations can be made as to which class of converters is best fit for this application.

  12. DC Breakdown Experiments with Iridium Cathode

    E-Print Network [OSTI]

    Profatilova, Iaroslava; Korsback, Anders; Muranaka, Tomoko; Wuensch, Walter

    2015-01-01T23:59:59.000Z

    Electrical breakdown occurring in rf accelerating structures is one of the major disruptions of the accelerated beam in CLIC. At CERN, as complements to rf facilities, DC-spark systems have been used to study breakdown properties of many candidate materials for making rf components. In this note, measurements of conditioning speed, breakdown field and field enhancement factor of iridium are presented comparing with previously tested materials. The average breakdown field after conditioning reached 238 MV/m, which places iridium next to copper. By comparison with results and properties of other metals, the low breakdown field of iridium could be explained by its face-centred-cubic crystal structure.

  13. DC Survey 2013 | National Nuclear Security Administration

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management Fermi Site OfficeCoursePublicCurrentCurtis110 1 ofDC

  14. User:Dc | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTri Global Energy LLCEnergy) RedirectCwebber Jump to: navigation,DbowersDc

  15. Dc's blog | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database DataDatatechnicNew Jersey: Energy ResourcesDc's blog Home

  16. Washington DC | 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlin BaxinUmweltVillageGraph HomeWarana Group of CooperativesDC Home

  17. XL-DC/Mark V Options You can customize the XL-DC and Mark V

    E-Print Network [OSTI]

    Berns, Hans-Gerd

    administrator with the NTP Time Server Protocol, network status, and statistics. This feature implements SNMP. XL-DC Mark V Network Time Server Telecommunications Interface Frequency Measurement STD Time Interface Low Phase Noise Output Network Interface Loss of Lock Alarm STD Programmable Pulse Output

  18. A Reachability-Based Method for Large-Signal Behavior Verification of DC-DC Converters

    E-Print Network [OSTI]

    Liberzon, Daniel

    -loop, large-signal system behavior verification, and iv) switching detail modeling. In open-loop, large´inguez-Garc´ia, Member, IEEE Abstract--A method for large-signal behavior verification of power electronics DC behavior verification, lengthy time-domain simula- tions are conducted to analyze the system response

  19. Development of a 55 kW 3X DC-DC Converter for HEV Systems

    E-Print Network [OSTI]

    Tolbert, Leon M.

    converter and a traction motor to drive the vehicle. In most commercial HEV systems, the power converter one of the hottest parts in the system. Hence, with the trend of higher coolant temperatures, those-dc converter and the continuous control of the modulation index of the inverter, it is sufficient to operate

  20. Energy Challenge Two: The WeatherizeDC Campaign | Department...

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

    economic and environmental justice by creating clean energy career opportunities for people who need them most. The DC Project applies cutting-edge organizing tools and tactics...

  1. assisted dc magnetron: Topics by E-print Network

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

    resistivity exceeding 1020 .cm 2. However, native defects (most Mekki, Abdelkarim 23 Optimization of DC reactive magnetron sputtering deposition process for efficient YSZ...

  2. DC Bus Capacitor Manufacturing Facility for Electric Drive Vehicles...

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

    0 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. apearravt028boan2010...

  3. average current dc: Topics by E-print Network

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

    ??Permanent magnet Brushless DC motor drives are being employed in newlinemany variable speed applications due to their high efficiency, silent operation, newlinecompact size,...

  4. ac to dc converters: Topics by E-print Network

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

    to use solid state Inverters(DC to AC converters) to have a variable voltage, fixed or variable frequency power source available for industrial applications. With advancements...

  5. PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL

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

    PHOTOVOLTAIC DC ARC FAULT DETECTOR TESTING AT SANDIA NATIONAL LABORATORIES Jay Johnson 1 , Birger Pahl 2 , Charles Luebke 2 , Tom Pier 2 , Theodore Miller 3 , Jason Strauch 1 ,...

  6. Identifying semiconductors by d.c. ionization conductivity

    E-Print Network [OSTI]

    2006-01-01T23:59:59.000Z

    expected from high-Z semiconductor detectors? ,” IEEE Transand binary compound semiconductors and insulators,” J PhysIdentifying Semiconductors by D.C. Ionization Conductivity

  7. DC Resistivity Survey (Wenner Array) At Mt Princeton Hot Springs...

    Open Energy Info (EERE)

    2008 - 2010 Usefulness useful DOE-funding Unknown Exploration Basis Determination of groundwater flux patterns Notes Researchers measured DC resistivity and produced 12 resistivity...

  8. Design and analysis of a zero-voltage switching scheme for a dc- to-dc converter 

    E-Print Network [OSTI]

    Arun, G.

    1992-01-01T23:59:59.000Z

    DESIGN AND ANALYSIS OF A ZERO-VOLTAGE SSVITCHING SCFIE'. tIE FOR A DC-TO-DC CONVERTER A Thesis by G. ARUN Submitted to the Office of Graduate Studies of Texas ARM 1. niversity in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 1992 Major Subject: Electrical Engineering DESIGN AND ANALYSIS OE A ZERO-VOLTAGE SWITCHING SCHEME I'OR A DC-TO-DC CONVERTER A Thesis by G. AR(tN Approved as to style and content by: P. Enjeti (Chair of Cornrnitteel C...

  9. Switch contact device for interrupting high current, high voltage, AC and DC circuits

    DOE Patents [OSTI]

    Via, Lester C.; Witherspoon, F. Douglas; Ryan, John M.

    2005-01-04T23:59:59.000Z

    A high voltage switch contact structure capable of interrupting high voltage, high current AC and DC circuits. The contact structure confines the arc created when contacts open to the thin area between two insulating surfaces in intimate contact. This forces the arc into the shape of a thin sheet which loses heat energy far more rapidly than an arc column having a circular cross-section. These high heat losses require a dramatic increase in the voltage required to maintain the arc, thus extinguishing it when the required voltage exceeds the available voltage. The arc extinguishing process with this invention is not dependent on the occurrence of a current zero crossing and, consequently, is capable of rapidly interrupting both AC and DC circuits. The contact structure achieves its high performance without the use of sulfur hexafluoride.

  10. SoC Energy Savings = Reduce+Reuse+Recycle: A Case Study Using a 660MHz DC-DC Converter with Integrated Output Filter

    E-Print Network [OSTI]

    Lemieux, Guy

    SoC Energy Savings = Reduce+Reuse+Recycle: A Case Study Using a 660MHz DC-DC Converter, mehdia, samad, prp, shahriar } @ ece.ubc.ca Abstract ­ This paper advocates `reduce, reuse, recycle to emphasize reuse and recycling as well. We design a DC-DC buck converter to demonstrate the 3 techniques

  11. Dynamic microscopic theory of fusion using DC-TDHF

    SciTech Connect (OSTI)

    Umar, A. S.; Oberacker, V. E.; Keser, R.; Maruhn, J. A.; Reinhard, P.-G. [Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235 (United States); RTE University, Science and Arts Faculty, Department of Physics, 53100, Rize (Turkey); Institut fuer Theoretische Physik, Goethe-Universitaet, D-60438 Frankfurt am Main (Germany); Institut fur Theoretische Physik, Universitat Erlangen, D-91054 Erlangen (Germany)

    2012-10-20T23:59:59.000Z

    The density-constrained time-dependent Hartree-Fock (DC-TDHF) theory is a fully microscopic approach for calculating heavy-ion interaction potentials and fusion cross sections below and above the fusion barrier. We discuss recent applications of DC-TDHF method to fusion of light and heavy systems.

  12. ELECTROMAGNETIC RADIATION FROM A STRONG DC ELECTRIC FIELD

    E-Print Network [OSTI]

    Guedel, Manuel

    ELECTROMAGNETIC RADIATION FROM A STRONG DC ELECTRIC FIELD Manuel G¨udel 1 and Donat G. Wentzel 2 1 accelerated by a strong dc electric field show not only very efficient generation of beam waves but also emission of o­mode radiation. We present a set of particle simulations for which we study the behavior

  13. Read-out electronics for DC squid magnetic measurements

    DOE Patents [OSTI]

    Ganther, Jr., Kenneth R. (Olathe, KS); Snapp, Lowell D. (Independence, MO)

    2002-01-01T23:59:59.000Z

    Read-out electronics for DC SQUID sensor systems, the read-out electronics incorporating low Johnson noise radio-frequency flux-locked loop circuitry and digital signal processing algorithms in order to improve upon the prior art by a factor of at least ten, thereby alleviating problems caused by magnetic interference when operating DC SQUID sensor systems in magnetically unshielded environments.

  14. National Small Business Federal Contracting Summit-DC Fall Conference

    Broader source: Energy.gov [DOE]

    The 2014 National Small Business Federal Contracting Summit - DC Fall Conference is presented jointly by the National Association of Small Business Contractors (the Supplier Council of The American Small Business Chamber of Commerce) and the U.S. Women's Chamber of Commerce in Washington DC.

  15. DC, AC and advanced EV propulsion systems

    SciTech Connect (OSTI)

    O'Neil, W.

    1983-08-01T23:59:59.000Z

    Battery development and liquid fuel availability and cost are still the pacing factors in wide scale electric vehicle introduction. Propulsion systems also require technical development, however, if electric vehicles are to be acceptable in the marketplace in competition against ICE vehicles. Eaton Corporation has undertaken a program designed to identify and investigate three broad types of propulsion systems in identical test vehicles on the same test track under conditions as similar as possible. Characteristics of dc, ac and advanced systems are compared to date, and projections of anticipated results and further work are provided. The compelling advantages of multiple mechanical ratios in EV propulsion systems are reviewed. An emerging, but less obvious, advantage is higher overall system efficiency.

  16. Abstract --A systematic framework for reliability assessment and fault-tolerant design of multiphase dc-dc

    E-Print Network [OSTI]

    Liberzon, Daniel

    reliability. Index Terms--Markov reliability modeling, maximum power point tracking, photovoltaics, switch1 Abstract -- A systematic framework for reliability assessment and fault-tolerant design of multiphase dc-dc converters deployed in photovoltaic applications is presented. System-level steady

  17. 3X DC-DC Multiplier/Divider for HEV Systems Wei Qian, Fang Z. Peng, Miaosen Shen

    E-Print Network [OSTI]

    Tolbert, Leon M.

    -dc converter, this converter can have three output/input voltage ratios with smooth transition. The control motor to drive the vehicle. The power converter could be just a traditional inverter or a dc, the inductor is bulky, heavy, costly, and always one of the hottest components. With the trend of higher

  18. Annual Meeting of Energy Recovery Council, W hi DC D b 3 2011Washington DC, December 3. 2011

    E-Print Network [OSTI]

    Columbia University

    Annual Meeting of Energy Recovery Council, W hi DC D b 3 2011Washington DC, December 3. 2011 to the recyclers (e.g. metal smelters; secondary paper mills).(e.g. metal smelters; secondary paper mills). All, recovery (called WastetoEnergy; WTE) gy, , y ( gy; ) · All countries (and communities) who rely on WTE also

  19. Development of a Novel Bi-Directional Isolated Multiple-Input DC-DC Converter

    SciTech Connect (OSTI)

    Li, H.

    2005-10-24T23:59:59.000Z

    There is vital need for a compact, lightweight, and efficient energy-storage system that is both affordable and has an acceptable cycle life for the large-scale production of electric vehicles (EVs) and hybrid electric vehicles (HEVs). Most of the current research employs a battery-storage unit (BU) combined with a fuel cell (FC) stack in order to achieve the operating voltage-current point of maximum efficiency for the FC system. A system block diagram is shown in Fig.1.1. In such a conventional arrangement, the battery is sized to deliver the difference between the energy required by the traction drive and the energy supplied by the FC system. Energy requirements can increase depending on the drive cycle over which the vehicle is expected to operate. Peak-power transients result in an increase of losses and elevated temperatures which result in a decrease in the lifetime of the battery. This research will propose a novel two-input direct current (dc) dc to dc converter to interface an additional energy-storage element, an ultracapacitor (UC), which is shown in Fig.1.2. It will assist the battery during transients to reduce the peak-power requirements of the battery.

  20. This document is the preprint version of the paper: L. Meng, T. Dragicevic, J.M. Guerrero, and J.C. Vasquez, "Stability constrained efficiency optimization for droop controlled dc-dc conversion

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    .C. Vasquez, "Stability constrained efficiency optimization for droop controlled dc-dc conversion system, Austria, Nov 2013. Stability Constrained Efficiency Optimization for Droop Controlled DC-DC Conversion a hierarchical control in a droop-controlled dc-dc conversion system with special focus on improving system

  1. Recovery Act State Memos Washington, DC

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

    are being used to hire or retrain staff in, building in-house expertise in the areas of Smart Grids, critical energy infrastructure interdependencies and cyber-security. *...

  2. Project identification and evaluation techniques for transportation infrastructure : assessing their role in metropolitan areas of developing countries

    E-Print Network [OSTI]

    Kumar, Vimal, S.M. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    Project identification and evaluation of transportation infrastructure play a vital role in shaping and sustaining the forms of cities all over the world. These cities differ substantially in character and urban form and ...

  3. Nitrogen gas emissions from stormwater retention basins during wet weather events in the Phoenix Metropolitan area: an additional ecosystem service?

    E-Print Network [OSTI]

    Hall, Sharon J.

    . We pretreated the basin with a heavy N isotope (15N in NO3 ­ ) to trace the fate of the N added from any process by basin design. Data calculated from gas fluxes in chambers after water, but potentially producing considerable amounts of N2O, a greenhouse gas Incoming data will allow complete

  4. Access to jobs : transportation barriers faced by low-skilled autoless workers in U.S. metropolitan areas

    E-Print Network [OSTI]

    Kawabata, Mizuki, 1972-

    2002-01-01T23:59:59.000Z

    One of the major concerns in today's urban labor market is spatial mismatch, the geographic separation between jobs and workers. Although numerous studies examine spatial mismatch, most of them focus on inner-city minorities, ...

  5. Connecting Land Use and Transportation Toward Sustainable Development: A Case Study of Houston-Galveston Metropolitan Area

    E-Print Network [OSTI]

    Lee, Jae Su

    2011-02-22T23:59:59.000Z

    of sustainable development; rather it has been defined and applied according to the goals and objectives of each agent or organization (Beatley 1995; Litman and Burwell 2006). There is, however, a widely used concept of sustainable development defined...

  6. Energy cost reduction study of the Washington Metropolitan Area Transit Authority metrorail system. volume 2: appendices. Final report

    SciTech Connect (OSTI)

    Uher, R.A.; Sathi, N.; Sathi, A.

    1982-05-01T23:59:59.000Z

    This study is the first time that the Energy Management Model (EMM), developed for the transit industry by the Rail Systems Center at Carnegie-Mellon University, was comprehensively applied to a rapid transit property. The application to Metrorail was verified by comparing the simulated results to actual data obtained from the Potomac Electric Power Company (PEPCO). The simulated results agree to within 3 percent of the actual energy consumption. Five energy conservation strategies were recommended for implementation based on high benefit and low cost, namely: coasting, catch-up operation, passenger load factor improvement, regeneration of braking energy, and passenger station lighting improvements.

  7. Implementing the DC Mode in Cosmological Simulations with Supercomoving Variables

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

    Gnedin, Nickolay Y.; Kravtsov, Andrey V.; Rudd, Douglas H.

    2011-06-02T23:59:59.000Z

    As emphasized by previous studies, proper treatment of the density fluctuation on the fundamental scale of a cosmological simulation volume - the 'DC mode' - is critical for accurate modeling of spatial correlations on scales ~> 10% of simulation box size. We provide further illustration of the effects of the DC mode on the abundance of halos in small boxes and show that it is straightforward to incorporate this mode in cosmological codes that use the 'supercomoving' variables. The equations governing evolution of dark matter and baryons recast with these variables are particularly simple and include the expansion factor, and hence the effect of the DC mode, explicitly only in the Poisson equation.

  8. SPEAR3 LARGE DC MAGNET POWER SUPPLIES

    SciTech Connect (OSTI)

    de Lira, A

    2004-06-23T23:59:59.000Z

    The Stanford Synchrotron Radiation Laboratory (SSRL) has successfully commissioned SPEAR3, its newly upgraded 3-GeV synchrotron light source. First stored beam occurred December 15, 2003 and 100mA operation was reached on January 20, 2004. This paper describes the specification, design, and performance of the SPEAR3 DC magnet large power supplies (LGPS) that consist of tightly-regulated (better than {+-}10 ppm) current sources ranging from 100A to 225A and output powers ranging from 70kW to 135kW. A total of 6 LGPS are in successful operation and are used to power strings of quadrupoles and sextupoles. The LGPS are isolated by a delta/delta-wye 60Hz step-down transformer that provides power to 2 series-connected chopper stages operating phase-shifted at a switching frequency of 18-kHz to provide for fast output response and high efficiency. Also described are outside procurement aspects, installation, in-house testing, and operation of the power supplies.

  9. Radiofrequency amplifier based on a dc superconducting quantum interference device

    DOE Patents [OSTI]

    Hilbert, Claude (Berkeley, CA); Martinis, John M. (Berkeley, CA); Clarke, John (Berkeley, CA)

    1986-01-01T23:59:59.000Z

    A low noise radiofrequency amplifier (10), using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID (11) and an input coil (12) are maintained at superconductivity temperatures in a superconducting shield (13), with the input coil (12) inductively coupled to the superconducting ring (17) of the dc SQUID (11). A radiofrequency signal from outside the shield (13) is applied to the input coil (12), and an amplified radiofrequency signal is developed across the dc SQUID ring (17) and transmitted to exteriorly of the shield (13). A power gain of 19.5.+-.0.5 dB has been achieved with a noise temperature of 1.0.+-.0.4 K. at a frequency of 100 MHz.

  10. Radiofrequency amplifier based on a dc superconducting quantum interference device

    DOE Patents [OSTI]

    Hilbert, C.; Martinis, J.M.; Clarke, J.

    1984-04-27T23:59:59.000Z

    A low noise radiofrequency amplifer, using a dc SQUID (superconducting quantum interference device) as the input amplifying element. The dc SQUID and an input coil are maintained at superconductivity temperatures in a superconducting shield, with the input coil inductively coupled to the superconducting ring of the dc SQUID. A radiofrequency signal from outside the shield is applied to the input coil, and an amplified radiofrequency signal is developed across the dc SQUID ring and transmitted to exteriorly of the shield. A power gain of 19.5 +- 0.5 dB has been achieved with a noise temperature of 1.0 +- 0.4 K at a frequency of 100 MHz.

  11. Mitigation of geomagnetically induced and dc stray currents. Final report

    SciTech Connect (OSTI)

    Kappenman, J.G.

    1983-12-01T23:59:59.000Z

    This report primarily describes several approaches to mitigate the effects of Geomagnetic Induced Currents (GIC) and dc stray currents in power systems; the engineering and design considerations for a neutral capacitor blocking device; and development and testing of a prototype device of this type. Modeling of the power system for computation of GIC are described. Results from three field tests, for documenting the effects of GIC by injecting direct current (dc) into the neutrals of the transformers, are presented. Several mitigation concepts are discussed and evaluated. The concept of blocking GIC and dc stray currents by a neutral capacitor is addressed in detail. The development and testing of the prototype blocking device is described. The technical requirements and specifications for the application of these devices are also included. A perspective on the economics of GIC mitigation is included. The effect of GIC and dc stray currents on HVdc converter operation, supported by computer simulations, is also discussed.

  12. Thermoelectric DC conductivities with momentum dissipation from higher derivative gravity

    E-Print Network [OSTI]

    Long Cheng; Xian-Hui Ge; Zu-Yao Sun

    2015-04-28T23:59:59.000Z

    We present a mechanism of momentum relaxation in higher derivative gravity by adding linear scalar fields to the Gauss-Bonnet theory. We analytically computed all of the DC thermoelectric conductivities in this theory by adopting the method given by Donos and Gauntlett in [arXiv:1406.4742]. The results show that the DC electric conductivity is not a monotonic function of the effective impurity parameter $\\beta$: in the small $\\beta$ limit, the DC conductivity is dominated by the coherent phase, while for larger $\\beta$, pair creation contribution to the conductivity becomes dominant, signaling an incoherent phase. In addition, the DC heat conductivity is found independent of the Gauss-Bonnet coupling constant.

  13. National Science Bowl Brings Best and Brightest to DC

    Broader source: Energy.gov [DOE]

    The National Science Bowl Finals in Washington D.C. April 27 to 30 pit 113 high and middle school teams against one another answering questions Jeopardy-style about biology, chemistry, earth science, physics, astronomy, and math.

  14. Reactive DC magnetron sputtering of ultrathin superconducting niobium nitride films

    E-Print Network [OSTI]

    Dane, Andrew E. (Andrew Edward)

    2015-01-01T23:59:59.000Z

    DC reactive magnetron sputtering was used to deposit few-nanometer-thick films of niobium nitride for fabrication of superconducting devices. Over 1000 samples were deposited on a variety of substrates, under various chamber ...

  15. Low Cost, High Temperature, High Ripple Current DC Bus Capacitors...

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

    2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer Evaluation Meeting, June 7-11, 2010 -- Washington D.C. ape031liu2010p.pdf More Documents &...

  16. A Multiphase, Modular, Bidirectional, Triple-Voltage DC-DC Converter Power Systems

    SciTech Connect (OSTI)

    Su, Gui-Jia [ORNL; Tang, Lixin [ORNL

    2008-01-01T23:59:59.000Z

    Electrical power systems in future hybrid and fuel cell vehicles may employ three voltage [14 V, 42 V, and high voltage (HV)] nets. These will be necessary to accommodate existing 14-V loads as well as efficiently handle new heavy loads at the 42-V net and a traction drive on the HV bus. A low-cost DC-DC converter was proposed for connecting the three voltage nets. It minimizes the number of switches and their associated gate driver components by using two half-bridges and a high-frequency transformer. Another salient feature is that the half bridge on the 42-V bus is also utilized to provide the 14-V bus by operating at duty ratios around an atypical value of 1/3. Moreover, it makes use of the parasitic capacitance of the switches and the transformer leakage inductance for soft switching. The use of half bridges makes the topology well suited for interleaved multiphase modular configurations as a means to increase the power level because the capacitor legs can be shared. This paper presents simulation and experimental results on an interleaved two-phase arrangement rated at 4.5 kW. Also discussed are the benefits of operating with an atypical duty ratio on the transformer and a preferred multiphase configuration to minimize capacitor ripple currents.

  17. Analysis of a transformer-less, multi-level DC-DC converter for HVDC operation

    SciTech Connect (OSTI)

    Karady, G.G.; Devarajan, S. [Arizona State Univ., Tempe, AZ (United States)

    1998-12-31T23:59:59.000Z

    HVDC systems require DC step up and DC step down units. The traditional approach is the application of twelve-pulse thyristor bridges with transformers. The developments of fast switching IGBT devices permit the development of transformer-less, multi-level converters. A multi-level circuit was suggested by Limpaecher. This paper presents a detailed simulation of the proposed circuit together with the analysis of its performance. The converter consists of a set of capacitors, air core inductors and solid state switches arranged in a ladder network. In the step-up mode, the closing of solid state switches resonantly charges the capacitors in parallel through an air-cored inductor. Then solid state switches resonantly charges the capacitors in parallel through an air-cored inductor. Then solid state switches connect the capacitors in series and discharge them through an air-core inductor to the load. In the step-down mode the capacitors are charged in series and discharged in parallel. The circuit has three modes of operation in each cycle: charge, inversion, and discharge. The circuit operation is analyzed in each mode using SPICE simulations. The selection of the components is discussed and output voltage regulation is analyzed. The results show that the proposed circuit promises significant reduction of losses, because of the zero current switching. The investment cost is reduced because of the elimination of transformers.

  18. Analysis and design of a saturable reactor assisted soft-switching full-bridge dc-dc converter

    SciTech Connect (OSTI)

    Hamada, Satoshi (Sansha Electric Manufacturing Co., Ltd., Osaka (Japan)); Nakaoka, Mutsuo (Kobe Univ. (Japan). Dept. of Electrical and Electronics Engineering)

    1994-05-01T23:59:59.000Z

    Analysis and design considerations for a saturable reactor assisted soft-switching full-bridge dc-dc converter are presented. The converter has advantages such as low switching losses with no substantial increase in conduction losses, wide load range, and constant frequency operation. To show how to utilize the analysis results, a 350-W, 500-kHz converter is chosen as a design example. The results are verified experimentally on a prototype converter.

  19. A High Efficiency DC-DC Converter Topology Suitable for Distributed Large Commercial and Utility Scale PV Systems

    SciTech Connect (OSTI)

    Mohammed S. Agamy; Maja Harfman-Todorovic; Ahmed Elasser; Robert L. Steigerwald; Juan A. Sabate; Song Chi; Adam J. McCann; Li Zhang; Frank Mueller

    2012-09-01T23:59:59.000Z

    In this paper a DC-DC power converter for distributed photovoltaic plant architectures is presented. The proposed converter has the advantages of simplicity, high efficiency, and low cost. High efficiency is achieved by having a portion of the input PV power directly fed forward to the output without being processed by the converter. The operation of this converter also allows for a simplified maximum power point tracker design using fewer measurements

  20. Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM

    E-Print Network [OSTI]

    EPA-694 Reid Rosnick/DC/USEPA/US 10/25/2012 11:54 AM To Philip Egidi cc bcc Subject Re: Subpart W Pennsylvania Ave., NW Washington, DC 20460 202.343.9563 rosnick.reid@epa.gov -----Philip Egidi/DC/USEPA/US wrote: ----- To: Reid Rosnick/DC/USEPA/US@EPA From: Philip Egidi/DC/USEPA/US Date: 10/25/2012 11:41AM Cc

  1. DOE Hosts Festival to Collect Items for Area Food Banks

    Broader source: Energy.gov [DOE]

    WASHINGTON, D.C. – Deputy Secretary of Energy Daniel Poneman and a representative of the Capital Area Food Bank are among the guest speakers at an event this Tuesday, July 31, to collect food items for the DOE Feeds Families drive.

  2. Charge and fluence lifetime measurements of a dc high voltage GaAs photogun at high average current

    SciTech Connect (OSTI)

    J. Grames, R. Suleiman, P.A. Adderley, J. Clark, J. Hansknecht, D. Machie, M. Poelker, M.L. Stutzman

    2011-04-01T23:59:59.000Z

    GaAs-based dc high voltage photoguns used at accelerators with extensive user programs must exhibit long photocathode operating lifetime. Achieving this goal represents a significant challenge for proposed high average current facilities that must operate at tens of milliamperes or more. This paper describes techniques to maintain good vacuum while delivering beam, and techniques that minimize the ill effects of ion bombardment, the dominant mechanism that reduces photocathode yield of a GaAs-based dc high voltage photogun. Experimental results presented here demonstrate enhanced lifetime at high beam currents by: (a) operating with the drive laser beam positioned away from the electrostatic center of the photocathode, (b) limiting the photocathode active area to eliminate photoemission from regions of the photocathode that do not support efficient beam delivery, (c) using a large drive laser beam to distribute ion damage over a larger area, and (d) by applying a relatively low bias voltage to the anode to repel ions created within the downstream beam line. A combination of these techniques provided the best total charge extracted lifetimes in excess of 1000 C at dc beam currents up to 9.5 mA, using green light illumination of bulk GaAs inside a 100 kV photogun.

  3. Characterization of the PvdS-regulated promoter motif in Pseudomonas syringae pv. tomato DC3000 reveals

    E-Print Network [OSTI]

    Myers, Chris

    Characterization of the PvdS-regulated promoter motif in Pseudomonas syringae pv. tomato DC3000S, a group IV sigma factor encoded by Pseudomonas syringae pv. tomato DC3000 (DC3000), a plant pathogen, 2002; Potvin et al., 2008). The model plant pathogen Pseudomonas syringae pv. tomato DC3000 (DC3000

  4. DESIGN OF A DC/RF PHOTOELECTRON GUN.

    SciTech Connect (OSTI)

    YU,D.NEWSHAM,Y.SMIRONOV,A.YU,J.SMEDLEY,J.SRINIVASAN RAU,T.LEWELLEN,J.ZHOLENTS,A.

    2003-05-12T23:59:59.000Z

    An integrated dc/rf photoelectron gun produces a low-emittance beam by first rapidly accelerating electrons at a high gradient during a short ({approx}1 ns), high-voltage pulse, and then injecting the electrons into an rf cavity for subsequent acceleration. Simulations show that significant improvement of the emittance appears when a high field ({approx} 0.5-1 GV/m) is applied to the cathode surface. An adjustable dc gap ({le} 1 mm) which can be integrated with an rf cavity is designed for initial testing at the Injector Test Stand at Argonne National Laboratory using an existing 70-kV pulse generator. Plans for additional experiments of an integrated dc/rf gun with a 250-kV pulse generator are being made.

  5. Application of direct pulsewidth modulation scheme to AC-DC converters: - a way to reduce ripple

    E-Print Network [OSTI]

    Zhang, Yuemin

    1993-01-01T23:59:59.000Z

    Modulation (ISPWM), 4 Direct Pulsewidth Modulation (DPWM). 15 5 Single Phase Half Controlled PWM ac-dc Converter . 6 Single Phase Full controlled PWM ac-dc Converter . 18 18 7 Simulation of SPWM ac-dc Converter. 20 8 Output Voltage Spectra of SPWM ac... 30 Balanced Three Phase Inputs 31 Output Voltage of A Three Phase Full Controlled ac-dc SPWM Converter. 42 32 Output Voltage of A Three Phase Full Controlled ac-dc EPWM Con- verter 33 Output Voltage of A Three Phase Full Controlled ac-dc ISPWM Con...

  6. Train the Teacher- Energy Workshops for DC-area Elementary School Teachers

    Broader source: Energy.gov [DOE]

    Are you an elementary school teacher looking for creative ideas to introduce energy curriculum to your students? If so, join us on Friday, May 2, 2014 for an exciting, hands-on training session...

  7. Policy Flash 2013-76 Term Assignments of Contractors to the DC Area |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn April 23, 2014, an OHA Administrative Judgea.Work Plan for FY7

  8. Policy Flash 2013-76 Term Assignments of Contractors to the DC Area |

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2 OPAM615_CostNSAR - T en YMedicineWhatAssistance Letter8Energy 5

  9. DC Resistivity Survey (Dipole-Dipole Array) At Coso Geothermal Area (1977)

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs andCrops Ltd Jump to: navigation, search Name:DBDBD|

  10. Exploring the Raft River geothermal area, Idaho, with the dc resistivity

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualPropertyd8c-a9ae-f8521cbb8489 NoEurope BV Jump to: navigation,Information 7 -Open

  11. High voltage dc--dc converter with dynamic voltage regulation and decoupling during load-generated arcs

    DOE Patents [OSTI]

    Shimer, D.W.; Lange, A.C.

    1995-05-23T23:59:59.000Z

    A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules. 5 Figs.

  12. High voltage dc-dc converter with dynamic voltage regulation and decoupling during load-generated arcs

    DOE Patents [OSTI]

    Shimer, Daniel W. (Danville, CA); Lange, Arnold C. (Livermore, CA)

    1995-01-01T23:59:59.000Z

    A high-power power supply produces a controllable, constant high voltage output under varying and arcing loads. The power supply includes a voltage regulator, an inductor, an inverter for producing a high frequency square wave current of alternating polarity, an improved inverter voltage clamping circuit, a step up transformer, an output rectifier for producing a dc voltage at the output of each module, and a current sensor for sensing output current. The power supply also provides dynamic response to varying loads by controlling the voltage regulator duty cycle and circuitry is provided for sensing incipient arc currents at the output of the power supply to simultaneously decouple the power supply circuitry from the arcing load. The power supply includes a plurality of discrete switching type dc--dc converter modules.

  13. Determining the Optimal Search Area for a Serial Mike O'Leary

    E-Print Network [OSTI]

    O'Leary, Michael

    Determining the Optimal Search Area for a Serial Criminal Mike O'Leary Department of Mathematics Towson University Joint Mathematics Meetings Washington DC, 2009 Mike O'Leary (Towson University) Optimal Department Mike O'Leary (Towson University) Optimal Search Areas for Serial Criminals January 7, 2009 2 / 31

  14. Research Areas

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOnItemResearch > TheNuclear Press Releases 2014References by WebsitehomeResearch Areas

  15. BEAM DYNAMICS SIMULATIONS FOR A DC GUN BASED INJECTOR FOR PERL...

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

    DC gun. The schematic layout of a PERL DC gun based injector and its preliminary beam dynamics are presented in this paper. The transverse and longitudinal emittance of photo-...

  16. Analysis of Fe Nanoparticles Using XPS Measurements Under D.C...

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

    Fe Nanoparticles Using XPS Measurements Under D.C. or Pulsed-Voltage Bias. Analysis of Fe Nanoparticles Using XPS Measurements Under D.C. or Pulsed-Voltage Bias. Abstract: The...

  17. Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on...

    Energy Savers [EERE]

    Moniz's Remarks at CSIS in Washington D.C. on Energy Security 40 Years after the Embargo - As Delivered Energy Secretary Moniz's Remarks at CSIS in Washington D.C. on Energy...

  18. U.S. Department of Energy - Washington, DC | Department of Energy

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

    Photovoltaic System at the Forrestal Building in Washington, DC The U.S. Department of Energy (DOE) is housed in the Forrestal Building in Washington, DC. A photovoltaic (PV)...

  19. Electrostatic coalescence system with independent AC and DC hydrophilic electrodes

    DOE Patents [OSTI]

    Hovarongkura, A. David (Arlington, VA); Henry, Jr., Joseph D. (Morgantown, WV)

    1981-01-01T23:59:59.000Z

    An improved electrostatic coalescence system is provided in which independent AC and DC hydrophilic electrodes are employed to provide more complete dehydration of an oil emulsion. The AC field is produced between an AC electrode array and the water-oil interface wherein the AC electrode array is positioned parallel to the interface which acts as a grounded electrode. The emulsion is introduced into the AC field in an evenly distributed manner at the interface. The AC field promotes drop-drop and drop-interface coalescence of the water phase in the entering emulsion. The continuous oil phase passes upward through the perforated AC electrode array and enters a strong DC field produced between closely spaced DC electrodes in which small dispersed droplets of water entrained in the continuous phase are removed primarily by collection at hydrophilic DC electrodes. Large droplets of water collected by the electrodes migrate downward through the AC electrode array to the interface. All phase separation mechanisms are utilized to accomplish more complete phase separation.

  20. DC WRRC Report No. 126 GROUND WATER RESOURCE ASSESSMENT STUDY

    E-Print Network [OSTI]

    District of Columbia, University of the

    DRILLING AND FIELD OPERATIONS REPORT FOR THE GROUP A WELLS D.C. WATER RESOURCES RESEARCH CENTER University No. 126 GROUND WATER RESOURCE ASSESSMENT STUDY FOR THE DISTRICT OF COLUMBIA WELL DRILLING AND FIELDDC WRRC Report No. 126 GROUND WATER RESOURCE ASSESSMENT STUDY FOR THE DISTRICT OF COLUMBIA WELL

  1. EE443L Lab 2: Modeling a DC Motor Introduction

    E-Print Network [OSTI]

    Wedeward, Kevin

    and add conversion factors. Copy the LabVIEW VI lab2.vi and its associated subVI Altera the four conversion factors. Motor voltage is measured with a voltage divider to ensure DAQ card analog: The DC motor is a common actuator in control systems that converts electrical energy into rotational

  2. DC Optimal Power Flow: Uniqueness and Chee Wei Tan

    E-Print Network [OSTI]

    Tan, Chee Wei

    and are computationally fast for practical smart power grids. I. BACKGROUND The Optimal Power Flow (OPF) problem network. The DC-OPF can be practically important in a smart grid, where there are renewables, e.g., solar implications on how algorithms can be designed to solve the OPF in a smart grid. Different from prior work

  3. D.C. Water Resources Research Institute Annual Technical Report

    E-Print Network [OSTI]

    projects that address the three components of integrated urban water system: storm water runoff and sewer developing and maintaining new environmental quality testing and modeling tools to advance water researchD.C. Water Resources Research Institute Annual Technical Report FY 2013 D.C. Water Resources

  4. Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,,

    E-Print Network [OSTI]

    Jackson, Robert B.

    Natural Gas Pipeline Leaks Across Washington, DC Robert B. Jackson,,, * Adrian Down, Nathan G increased in recent decades, but incidents involving natural gas pipelines still cause an average of 17 fatalities and $133 M in property damage annually. Natural gas leaks are also the largest anthropogenic

  5. High Voltage DC Transmission 1.0 Introduction

    E-Print Network [OSTI]

    McCalley, James D.

    1 High Voltage DC Transmission 1.0 Introduction HVDC has been applied in electric power systems for many years now. Figure 1 illustrates worldwide many of the HVDC applications [1]. Fig. 1 ABB provides a webpage which summarizes HVDC projects by type and capacity or by commissioning year [2]. Wikipedia [3

  6. High Voltage DC Transmission 2 1.0 Introduction

    E-Print Network [OSTI]

    McCalley, James D.

    1 High Voltage DC Transmission 2 1.0 Introduction Interconnecting HVDC within an AC system requires on use of switching devices collectively referred to in the HVDC community as valves. Valves may be non. Fig. 1 There have been three types of devices for implementing HVDC converter circuits: mercury

  7. WASHINGTON TECHNICAL INSTITUTE WASHINGTON, D.C. 20008

    E-Print Network [OSTI]

    District of Columbia, University of the

    WASHINGTON TECHNICAL INSTITUTE WASHINGTON, D.C. 20008 WRRC REPORT NO. 9 CHARACTERIZATION-379, as amended. Agreement No. 14-34-0001-6066 Water Resources Research Center Washington Technical Institute Analysis of Composite Samples Before Concentration............ 16 5. Organic Losses During Concentration

  8. Reprint & Copyright by Aerospace Medical Association, Washington, DC

    E-Print Network [OSTI]

    Reprint & Copyright ©by Aerospace Medical Association, Washington, DC TECHNICAL NOTE Reflectance.EPICS Biomedical Engineering and Science Institute and Department of Electrical and Computer Engineering, Drexel and pulsatile and mean Doppler velocities were examined as predictors of impending peripheral light loss (PLL

  9. Building Scale DC Microgrids Chris Marnay, Steven Lanzisera, Michael Stadler, and Judy Lai

    E-Print Network [OSTI]

    of building loads are either native DC, such as electronics and compact fluorescent and light emitting diode

  10. Interviews in Washington, DC for Albert Einstein Fellowship Semi-Finalists

    Broader source: Energy.gov [DOE]

    Selected semi-finalists in the Albert Einstein Distinguished Educator Fellowship are invited to DC for interviews.

  11. A Decentralized Protection Scheme for Converters Utilizing a DC-link Inductor

    E-Print Network [OSTI]

    Lipo, Thomas

    - as in HVDC transmission for example - as well as in DC-links for high-power current source inverters

  12. Control of a Fuel-Cell Powered DC Electric Vehicle Motor

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad Meeting, 2005 www.ntnu.no Federico Zenith, Sigurd Skogestad, Control of a Fuel-Cell Powered DC Electric Vehicle Motor #12;2 Outline 1) Control of Fuel Cells--Status 2) Dynamic Modelling of Fuel Cells 3) DC

  13. Development of 13-V, 5000-A DC Power Supply with High-Frequency Transformer Coupling

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    -voltage and large-current DC power supply with a high-frequency transformer coupling, which is applied to electric. Keywords-DC power supply; low-voltage and large-current; high-frequency transformer; Schottky diodeDevelopment of 13-V, 5000-A DC Power Supply with High-Frequency Transformer Coupling Applied

  14. FLATNESS BASED CONTROL OF A BUCK-CONVERTER DRIVEN DC MOTOR

    E-Print Network [OSTI]

    Knobloch,Jürgen

    FLATNESS BASED CONTROL OF A BUCK-CONVERTER DRIVEN DC MOTOR Felix Antritter ,1 Peter Maurer Johann on the circuit and control design of a buck converter driven DC motor. The steps of design, as for example objective: tracking control of the DC motor's shaft angular velocity. The dynamic system composed from

  15. A Noise-Shaped Switched-Capacitor DC-DC Voltage Regulator A. Rao, W.McIntyre 1

    E-Print Network [OSTI]

    Moon, Un-Ku

    -dc converter with fractional gains. The charge pump used to convert the input voltage acts as a D/A converter the inductive conversion topology has been the standard solution to providing a constant and stable voltage from a battery. With the continued shrinking of the hand-held devices as cell phones, PDA's, pagers and laptops

  16. 164 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 1, JANUARY 2006 A Digitally Controlled DC/DC Converter

    E-Print Network [OSTI]

    Popovic, Zoya

    164 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 21, NO. 1, JANUARY 2006 A Digitally Controlled DC of power, dynamic control of the drain supply voltage has been proposed [1]­[6]. The technique of adjusting-loop implementation of the RFPA power control through the drain supply voltage. The ob- jectives are to improve

  17. Recovery Act: Integrated DC-DC Conversion for Energy-Efficient Multicore Processors

    SciTech Connect (OSTI)

    Shepard, Kenneth L

    2013-03-31T23:59:59.000Z

    In this project, we have developed the use of thin-film magnetic materials to improve in energy efficiency of digital computing applications by enabling integrated dc-dc power conversion and management with on-chip power inductors. Integrated voltage regulators also enables fine-grained power management, by providing dynamic scaling of the supply voltage in concert with the clock frequency of synchronous logic to throttle power consumption at periods of low computational demand. The voltage converter generates lower output voltages during periods of low computational performance requirements and higher output voltages during periods of high computational performance requirements. Implementation of integrated power conversion requires high-capacity energy storage devices, which are generally not available in traditional semiconductor processes. We achieve this with integration of thin-film magnetic materials into a conventional complementary metal-oxide-semiconductor (CMOS) process for high-quality on-chip power inductors. This project includes a body of work conducted to develop integrated switch-mode voltage regulators with thin-film magnetic power inductors. Soft-magnetic materials and inductor topologies are selected and optimized, with intent to maximize efficiency and current density of the integrated regulators. A custom integrated circuit (IC) is designed and fabricated in 45-nm CMOS silicon-on-insulator (SOI) to provide the control system and power-train necessary to drive the power inductors, in addition to providing a digital load for the converter. A silicon interposer is designed and fabricated in collaboration with IBM Research to integrate custom power inductors by chip stacking with the 45-nm CMOS integrated circuit, enabling power conversion with current density greater than 10A/mm2. The concepts and designs developed from this work enable significant improvements in performance-per-watt of future microprocessors in servers, desktops, and mobile devices. These new approaches to scaled voltage regulation for computing devices also promise significant impact on electricity consumption in the United States and abroad by improving the efficiency of all computational platforms. In 2006, servers and datacenters in the United States consumed an estimated 61 billion kWh or about 1.5% of the nation's total energy consumption. Federal Government servers and data centers alone accounted for about 10 billion kWh, for a total annual energy cost of about $450 million. Based upon market growth and efficiency trends, estimates place current server and datacenter power consumption at nearly 85 billion kWh in the US and at almost 280 billion kWh worldwide. Similar estimates place national desktop, mobile and portable computing at 80 billion kWh combined. While national electricity utilization for computation amounts to only 4% of current usage, it is growing at a rate of about 10% a year with volume servers representing one of the largest growth segments due to the increasing utilization of cloud-based services. The percentage of power that is consumed by the processor in a server varies but can be as much as 30% of the total power utilization, with an additional 50% associated with heat removal. The approaches considered here should allow energy efficiency gains as high as 30% in processors for all computing platforms, from high-end servers to smart phones, resulting in a direct annual energy savings of almost 15 billion kWh nationally, and 50 billion kWh globally. The work developed here is being commercialized by the start-up venture, Ferric Semiconductor, which has already secured two Phase I SBIR grants to bring these technologies to the marketplace.

  18. Point of collapse and continuation methods for large ac/dc systems

    SciTech Connect (OSTI)

    Canizares, C.A. (Escuela Politecnica Nacional, Quito (Ecuador)); Alvarado, F.L. (Univ. of Wisconsin, Madison, WI (United States))

    1993-02-01T23:59:59.000Z

    This paper describes the implementation of both Point of Collapse (PoC) methods and continuation methods for the computation of voltage collapse points (saddle-node bifurcations) in large ac/dc systems. A comparison of the performance of these methods is presented for real systems of up to 2,158 buses. The paper discusses computational details of the implementation of the PoC and continuation methods, and the unique challenges encountered due to the presence of high voltage direct current (HVDC) transmission, area interchange power control regulating transformers, and voltage and reactive power limits. The characteristics of a robust PoC power flow program are presented, and its application to detection and solution of voltage stability problems is demonstrated.

  19. Potential for a cycling steam power plant with TES to supply district heating in Washington DC

    SciTech Connect (OSTI)

    Hobson, M.J.

    1984-02-01T23:59:59.000Z

    The Energy Office of the District of Columbia is planning the conversion of a 1500 TPD incinerator for district heating and the generation of electric power for sale to the local utility, PEPCO. This paper records a preliminary evaluation of whether hot water storage would be appropriate at the heat source plant to maximize power sales and improve the reliability of the district heat service. Hot water storage is being employed successfully at Herning, Denmark, in conjunction with a cogeneration plant heat source, and this concept is adapted to Washington D.C. area needs for heating and cooling service. Heat storage allows a 7% increase in power sales based on a simplified approach to daily load profiles and PEPCO's proposed avoided cost rates. Pressurized storage is uneconomic due to the high cost of containment, but atmospheric storage at 200F shows a simple payback of 5 years.

  20. Dependence of plasma characteristics on dc magnetron sputter parameters

    SciTech Connect (OSTI)

    Wu, S.Z. [Recording Media Operation, Seagate Technology, 47010 Kato Road, Fremont, California 94538 (United States)

    2005-10-15T23:59:59.000Z

    Plasma discharge characteristics of a dc magnetron system were measured by a single Langmuir probe at the center axis of the dual-side process chamber. Plasma potential, floating potential, electron and ion densities, and electron temperature were extracted with varying dc power and gas pressure during sputter deposition of a metal target; strong correlations were shown between these plasma parameters and the sputter parameters. The electron density was controlled mostly by secondary electron generation in constant power mode, while plasma potential reflects the confinement space variation due to change of discharge voltage. When discharge pressure was varied, plasma density increases with the increased amount of free stock molecules, while electron temperature inversely decreased, due to energy-loss collision events. In low-pressure discharges, the electron energy distribution function measurements show more distinctive bi-Maxwellian distribution, with the fast electron temperature gradually decreases with increased gas pressure.

  1. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng (Knoxville, TN); Lai, Jih-Sheng (Blacksburg, VA)

    2002-01-01T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  2. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng (Oak Ridge, TN); Lai, Jih-Sheng (Knoxville, TN)

    1997-01-01T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  3. Multilevel cascade voltage source inverter with seperate DC sources

    DOE Patents [OSTI]

    Peng, Fang Zheng; Lai, Jih-Sheng

    2001-04-03T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations.

  4. Multilevel cascade voltage source inverter with separate DC sources

    DOE Patents [OSTI]

    Peng, F.Z.; Lai, J.S.

    1997-06-24T23:59:59.000Z

    A multilevel cascade voltage source inverter having separate DC sources is described herein. This inverter is applicable to high voltage, high power applications such as flexible AC transmission systems (FACTS) including static VAR generation (SVG), power line conditioning, series compensation, phase shifting and voltage balancing and fuel cell and photovoltaic utility interface systems. The M-level inverter consists of at least one phase wherein each phase has a plurality of full bridge inverters equipped with an independent DC source. This inverter develops a near sinusoidal approximation voltage waveform with only one switching per cycle as the number of levels, M, is increased. The inverter may have either single-phase or multi-phase embodiments connected in either wye or delta configurations. 15 figs.

  5. Cities in Times of Crisis: The Response of Local Governments in Light of the Global Economic Crisis: the role of the formation of human capital, urban innovation and strategic planning

    E-Print Network [OSTI]

    Cohen, Manuel Perlo

    2011-01-01T23:59:59.000Z

    Metropolitan   Area     Campeche                    quarter  in  2010,  Campeche  recorded  an  unemployment  

  6. This document is a preprint of the paper: L. Meng, T. Dragicevic, J.M. Guerrero, and J.C Vasquez, "Optimization with system damping restoration for droop controlled dc-dc converters," in

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    , "Optimization with system damping restoration for droop controlled dc-dc converters," in Proc. IEEE Energy Restoration for Droop Controlled DC-DC Converters Lexuan Meng, Tomislav Dragicevic, Josep M. Guerrero, Juan C systems and uninterruptable power supply systems. Droop control along with virtual resistance (VR

  7. Disc rotors with permanent magnets for brushless dc motor

    SciTech Connect (OSTI)

    Hawsey, R.A.; Bailery, J.M.

    1992-05-26T23:59:59.000Z

    This patent describes a brushless dc permanent magnet motor for driving an autonomous underwater vehicle. It comprises first and second substantially flat, generally cylindrical stators disposed in side by side relation; a first substantially flat, generally cylindrical rotor; a first shaft connected to the first rotor and a second, concentric shaft connected to the second rotor; and means for providing rotation of the first and second shafts in opposite directions.

  8. The Use of DC Glow Discharges as Undergraduate Educational Tools

    SciTech Connect (OSTI)

    Stephanie A. Wissel and Andrew Zwicker, Jerry Ross, and Sophia Gershman

    2012-10-09T23:59:59.000Z

    Plasmas have a beguiling way of getting students excited and interested in physics. We argue that plasmas can and should be incorporated into the undergraduate curriculum as both demonstrations and advanced investigations of electromagnetism and quantum effects. Our device, based on a direct current (DC) glow discharge tube, allows for a number of experiments into topics such as electrical breakdown, spectroscopy, magnetism, and electron temperature.

  9. DC and RF Measurements of Serial Bi-SQUID Arrays

    E-Print Network [OSTI]

    Prokopenko, G V; de Escobar, A Leese; Taylor, B; de Andrade, M C; Berggren, S; Longhini, P; Palacios, A; Nisenoff, M; Fagaly, R L

    2012-01-01T23:59:59.000Z

    SQUID arrays are promising candidates for low profile antennas and low noise amplifier applications. We present the integrated circuit designs and results of DC and RF measurements of the wideband serial arrays based on integration of linear bi-SQUID cells forming a Superconducting Quantum Interference Filter (bi-SQUID SQIF). Various configurations of serial arrays designs are described. The measured linearity, power gain, and noise temperature are analyzed and compared. The experimental results are matched to results of mathematical modeling. A serial bi-SQUID SQIF arrays are mounted into a coplanar waveguide (CPW) and symmetrically grounded to corresponding sides of CPW. The RF output comes out from the central common line, which is also used for DC biasing and forms a symmetrical balanced output. The signal and DC flux biasing line is designed as coplanar lines passed in parallel over each bi-SQUID cell in a bidirectional fashion concentrating magnetic flux inside of each cell. Serial bi-SQUID SQIF arrays ...

  10. Summary of electric vehicle dc motor-controller tests

    SciTech Connect (OSTI)

    McBrien, E F; Tryon, H B

    1982-09-01T23:59:59.000Z

    Available performance data for production motors are usually of marginal value to the electric vehicle designer. To provide at least a partial remedy to this situation, tests of typical dc propulsion motors and controllers were conducted as part of the DOE Electric Vehicle Program. The objectives of this program were to evaluate the differences in the performance of dc motors when operating with chopper-type controllers and when operating on direct current; and to gain an understanding of the interactions between the motor and the controller which cause these differences. Toward this end, motor-controller tests performed by the NASA Lewis Research Center provided some of the first published data that quantified motor efficiency variations for both ripple-free (straight dc) and chopper modes of operation. Test and analysis work at the University of Pittsburgh explored motor-controller relationships in greater depth. And to provide additional data, 3E Vehicles tested two small motors, both on a dynamometer and in a vehicle, and the Eaton Corporation tested larger motors, using sophisticated instrumentation and digital processing techniques. All the motors tested were direct-current types. Of the separately excited types, seven were series wound and two were shunt wound. One self-excited permanent magnet type was also tested. Four of the series wound motors used brush shifting to obtain good commutation. In almost all cases, controller limitations constrained the test envelope so that the full capability of the motors could not be explored.

  11. Abstract -This paper presents the coordinated control of distributed energy storage systems (DESSs) in DC micro-grids.

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    ) in DC micro-grids. In order to balance the state-of-charge (SoC) of each energy storage unit (ESU--Droop control; distributed energy storage system (DESS); DC micro-grids; state-of-charge (SoC) I. INTRODUCTION and more popularity [1]. Nowadays DC micro-grids are becoming more attractive with the raise of DC power

  12. Optimal Demand Response in DC Distribution Networks Hamed Mohsenian-Rad, Member, IEEE and Ali Davoudi, Member, IEEE

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    such as photovoltaic systems are essentially DC sources. Battery storage devices are also easier H. Mohsenian

  13. Multiphase soft switched DC/DC converter and active control technique for fuel cell ripple current elimination

    DOE Patents [OSTI]

    Lai, Jih-Sheng (Blacksburg, VA); Liu, Changrong (Sunnyvale, CA); Ridenour, Amy (Salem, VA)

    2009-04-14T23:59:59.000Z

    DC/DC converter has a transformer having primary coils connected to an input side and secondary coils connected to an output side. Each primary coil connects a full-bridge circuit comprising two switches on two legs, the primary coil being connected between the switches on each leg, each full-bridge circuit being connected in parallel wherein each leg is disposed parallel to one another, and the secondary coils connected to a rectifying circuit. An outer loop control circuit that reduces ripple in a voltage reference has a first resistor connected in series with a second resistor connected in series with a first capacitor which are connected in parallel with a second capacitor. An inner loop control circuit that reduces ripple in a current reference has a third resistor connected in series with a fourth resistor connected in series with a third capacitor which are connected in parallel with a fourth capacitor.

  14. Site Monitoring Area Maps

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

    to the Site Monitoring Area (SMA) The Site Monitoring Area sampler Control measures (best management practices) installed at the Site Monitoring Area Structures such as...

  15. Wildlife Management Areas (Minnesota)

    Broader source: Energy.gov [DOE]

    Certain areas of the State are designated as wildlife protection areas and refuges; new construction and development is restricted in these areas.

  16. Hardwired Control Changes For NSTX DC Power Feeds

    SciTech Connect (OSTI)

    Ramakrishnan, S.

    2013-06-28T23:59:59.000Z

    The National Spherical Torus Experiment (NSTX) has been designed and installed in the existing facilities at Princeton Plasma Physics Laboratory (PPPL). Most of the hardware, plant facilities, auxiliary sub-systems, and power systems originally used for the Tokamak Fusion Test Reactor (TFTR) have been used with suitable modifications to reflect NSTX needs. The original TFTR Hardwired Control System (HCS) with electromechanical relays was used for NSTX DC Power loop control and protection during NSTX operations. As part of the NSTX Upgrade, the HCS is being changed to a PLC-based system with the same control logic. This paper gives a description of the changeover to the new PLC-based system __________________________________________________

  17. Superconducting DC and RF Properties of Ingot Niobium

    E-Print Network [OSTI]

    Dhakal, Pashupati; Kneisel, Peter; Myneni, Ganapati Rao

    2012-01-01T23:59:59.000Z

    The thermal conductivity, DC magnetization and penetration depth of large-grain niobium hollow cylindrical rods fabricated from ingots, manufactured by CBMM subjected to chemical and heat treatment were measured. The results confirm the influence of chemical and heat-treatment processes on the superconducting properties, with no significant dependence on the impurity concentrations in the original ingots. Furthermore, RF properties, such as the surface resistance and quench field of the niobium rods were measured using a TE011 cavity. The hollow niobium rod is the center conductor of this cavity, converting it to a coaxial cavity. The quench field is limited by the critical heat flux through the rods' cooling channel.

  18. The dc modeling program (DCMP): Version 2. 0

    SciTech Connect (OSTI)

    Chapman, D.G. (Manitoba HVDC Research Centre, Winnipeg, MB (Canada))

    1990-08-01T23:59:59.000Z

    In this project one of the main objectives was the refinement of tools for the study of HVDC systems. The original software was prepared in project RP1964-2 (EL-4365) as power flow and stability program models for HVDC systems. In this project new modeling capabilities were added to both the power flow and stability models. Additionally, the HVDC specific model capabilities were integrated into a new program, termed the Standalone program, for use in the development and testing of HVDC models. This manual provides technical background for programmers and those interested in understanding, augmenting or transporting the dc models.

  19. Positron lifetime spectrometer using a DC positron beam

    DOE Patents [OSTI]

    Xu, Jun; Moxom, Jeremy

    2003-10-21T23:59:59.000Z

    An entrance grid is positioned in the incident beam path of a DC beam positron lifetime spectrometer. The electrical potential difference between the sample and the entrance grid provides simultaneous acceleration of both the primary positrons and the secondary electrons. The result is a reduction in the time spread induced by the energy distribution of the secondary electrons. In addition, the sample, sample holder, entrance grid, and entrance face of the multichannel plate electron detector assembly are made parallel to each other, and are arranged at a tilt angle to the axis of the positron beam to effectively separate the path of the secondary electrons from the path of the incident positrons.

  20. Category:DC Resistivity Survey (Wenner Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, click here. Category:Conceptual Model Add.png Add a newpage?InformationDC

  1. EA-327-A DC Energy, LLC | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of No53197EFindingEA-257-CEA-296-B22 Emera EnergyEA-326327-A DC

  2. PowerCentsDC Program Final Report | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn'tOrigin of Contamination in235-1Department of60Power Purchase Agreements PowerPowerCentsDC Program

  3. EA-327-A DC Energy, LLC | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1Energy |Final Site-WideBPAPowerEE US No.Subsidary No. 5 LLCtoDC

  4. EA-377 DC Energy Texas | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onYouTube YouTube Note: Since the YouTube|6721 Federal Register / Vol. 73, No.Plant for5: Finding7:11:D3 EDF Trading67 DC

  5. DC Resistivity Survey (Dipole-Dipole Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs andCrops Ltd Jump to: navigation, searchDC

  6. Workplace Charging Challenge Partner: Washington Area New Automobile...

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

    Association (WANADA) serves as the representative organization for all franchised new car dealers in the metropolitan Washington region. Workplace charging matches the vision...

  7. Sustainable Energy Utility- D.C. Home Performance (District of Columbia)

    Broader source: Energy.gov [DOE]

    The District of Columbia Sustainable Energy Utility currently offers the D.C. Home Performance program (DCHP). DCHP provides a $500 incentive to properties which successfully complete qualifying...

  8. Washington DC Regions | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Washington DC Regions National Science Bowl (NSB) NSB Home About High School Middle School Middle School Students Middle School Coaches Middle School Regionals Middle School...

  9. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    currently being entirely off-grid is much more costly andcan operate off the DC Flexzone Grid [20] and are developing

  10. We Have a Winner - DC High School Regional Science Bowl Competition...

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

    We Have a Winner - DC High School Regional Science Bowl Competition Held Last Saturday Annie Whatley Annie Whatley Deputy Director, Office of Minority Education and Community...

  11. Optimization of spin-torque switching using AC and DC pulses

    SciTech Connect (OSTI)

    Dunn, Tom [Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Kamenev, Alex [Department of Physics, University of Minnesota, Minneapolis, Minnesota 55455 (United States); Fine Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States)

    2014-06-21T23:59:59.000Z

    We explore spin-torque induced magnetic reversal in magnetic tunnel junctions using combined AC and DC spin-current pulses. We calculate the optimal pulse times and current strengths for both AC and DC pulses as well as the optimal AC signal frequency, needed to minimize the Joule heat lost during the switching process. The results of this optimization are compared against numeric simulations. Finally, we show how this optimization leads to different dynamic regimes, where switching is optimized by either a purely AC or DC spin-current, or a combination AC/DC spin-current, depending on the anisotropy energies and the spin-current polarization.

  12. Wildlife Management Areas (Florida)

    Broader source: Energy.gov [DOE]

    Certain sites in Florida are designated as wildlife management areas, and construction and development is heavily restricted in these areas.

  13. Waste form development for a DC arc furnace

    SciTech Connect (OSTI)

    Feng, X.; Bloomer, P.E.; Chantaraprachoom, N.; Gong, M.; Lamar, D.A.

    1996-09-01T23:59:59.000Z

    A laboratory crucible study was conducted to develop waste forms to treat nonradioactive simulated {sup 238}Pu heterogeneous debris waste from Savannah River, metal waste from the Idaho National Engineering Laboratory (INEL), and nominal waste also from INEL using DC arc melting. The preliminary results showed that the different waste form compositions had vastly different responses for each processing effect. The reducing condition of DC arc melting had no significant effects on the durability of some waste forms while it decreased the waste form durability from 300 to 700% for other waste forms, which resulted in the failure of some TCLP tests. The right formulations of waste can benefit from devitrification and showed an increase in durability by 40%. Some formulations showed no devitrification effects while others decreased durability by 200%. Increased waste loading also affected waste form behavior, decreasing durability for one waste, increasing durability by 240% for another, and showing no effect for the third waste. All of these responses to the processing and composition variations were dictated by the fundamental glass chemistry and can be adjusted to achieve maximal waste loading, acceptable durability, and desired processing characteristics if each waste formulation is designed for the result according to the glass chemistry.

  14. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, G.R.

    1983-11-29T23:59:59.000Z

    A dc switching regulated power supply for driving an inductive load is provided. The regulator basic circuit is a bridge arrangement of diodes and transistors. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. A dc power supply is connected to the input of the bridge and the output is connected to the load. A servo controller is provided to control the switching rate of the transistors to maintain a desired current to the load. The regulator may be operated in three stages or modes: (1) for current runup in the load, both first and second transistor switch arrays are turned on and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned off, and load current flywheels through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays off, allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load.

  15. SECONDARY MINERALS FOUND IN CORES DC2 Al AND DC2 TAKEN FROM THE GRANDE RONDE BASALT FORMATION, PASCO BASIN, WASHINGTON

    E-Print Network [OSTI]

    Teague, L.S.

    2010-01-01T23:59:59.000Z

    of secondary and primary mineral phases in basalts of theB. , 1975. Perched silia minerals on mordenite fibers. Jour.lt;. UC—70 I SECONDARY MINERALS FOUND IN CORES DC2 AI AND

  16. DC H2O: What's on Tap? Annual Progress Report for FY 2004

    E-Print Network [OSTI]

    District of Columbia, University of the

    for distributing treated water to DC residents has taken the brunt of the blame and has developed mechanisms. Project resources have secured a GPS unit and additional resources have already been allocated for GIS as a part of the 4-H Youth Cyber Camp. And as such, will incorporate the technological aspects of the DC H2O

  17. Towards Building an Optimal Demand Response Framework for DC Distribution Networks

    E-Print Network [OSTI]

    Mohsenian-Rad, Hamed

    . There- fore, in this paper, the first steps are taken towards designing de- mand response programs, such as photovoltaic (PV) systems, batteries, and fuel cells, that are natively DC sources. H. MohsenianTowards Building an Optimal Demand Response Framework for DC Distribution Networks Hamed Mohsenian

  18. Smith, D.C., et al., 2000 ODP Technical Note 28

    E-Print Network [OSTI]

    Smith, D.C., et al., 2000 ODP Technical Note 28 METHODS FOR QUANTIFYING POTENTIAL MICROBIAL CONTAMINATION DURING DEEP OCEAN CORING 1,2 David C. Smith,3 Arthur J. Spivack,4 Martin R. Fisk,5 Shelley A that these contamination tests be routinely conducted when coring for microbiological studies. 1Smith, D.C., Spivack, A

  19. Genomic Plasticity Enables Phenotypic Variation of Pseudomonas syringae pv. tomato DC3000

    E-Print Network [OSTI]

    Myers, Chris

    Genomic Plasticity Enables Phenotypic Variation of Pseudomonas syringae pv. tomato DC3000 Zhongmeng of a genomic anomaly in the region of 4.7 to 4.9 Mb of the Pseudomonas syringae pv. tomato (Pst) DC3000 genome in P. syringae. Citation: Bao Z, Stodghill PV, Myers CR, Lam H, Wei H-L, et al. (2014) Genomic

  20. Zeroing Transformer's DC Current in Resonant Converters with No Series Capacitors

    E-Print Network [OSTI]

    Gertsman, Student Member, IEEE and Sam Ben-Yaakov ,Fellow, IEEE Power Electronics Laboratory Department: www.ee.bgu.ac.il/~pel Abstract - DC current unbalance in the windings of a transformer may initiate the transformer's DC current to zero by correcting the asymmetry of the drive. This balancing control

  1. Control of Parallel-Connected Bidirectional AC-DC Converters in Stationary Frame for Microgrid

    E-Print Network [OSTI]

    Teodorescu, Remus

    Sistemes Automŕtica i Informŕtica Industrial Universitat Politčcnica de Catalunya Abstract. In this paper, parallel-connected bidirectional converters for AC and DC hybrid microgrid application energy sources [3-6]. A hybrid microgrid can be made up of distributed renewable source, AC and DC common

  2. The Data Center (DC) Genome project is a collaborative effort with Microsoft Research

    E-Print Network [OSTI]

    Amir, Yair

    that IT equipment needs abundant cooling to operate reliably, the CRAC systems in many data centers are set to very, Project Genome: Wireless Sensor Network for Data Center Cooling , The Architecture Journal volume 18, 2009DC Genome The Data Center (DC) Genome project is a collaborative effort with Microsoft Research

  3. PID Control with Derivative Filtering Integral Anti-Windup for a DC Servo

    E-Print Network [OSTI]

    PID Control with Derivative Filtering and Integral Anti-Windup for a DC Servo Nicanor Quijano in the prelab for PID controllers. For that, we use the DC motor for the SRV-02ET to do position control. You . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.4 PID Controller with Derivative Filtering

  4. Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management

    E-Print Network [OSTI]

    Vasquez, Juan Carlos

    such as photovoltaic (PV) systems and secondary batteries. In this paper, several distributed generators (DGs) have1 Supervisory Control of an Adaptive-Droop Regulated DC Microgrid with Battery Management been merged together with a pair of batteries and loads to form an autonomous dc Microgrid (MG

  5. A nonlinear robust HVDC control for a parallel AC/DC power system

    E-Print Network [OSTI]

    Qu, Zhihua

    A nonlinear robust HVDC control for a parallel AC/DC power system Hongzhi Cai a , Zhihua Qu b. Keywords: Robust control; HVDC; Power system; Stability; Lyapunov method 1. Introduction It has been recognized that, through an HVDC transmission line, fast electronic control can be applied on the DC power

  6. CTMCONTROL: Addressing the MC/DC Objective for Safety-Critical Automotive Software

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    CTMCONTROL: Addressing the MC/DC Objective for Safety-Critical Automotive Software Anila Mjeda.mjeda,mike.hinchey}@lero.ie Abstract. We propose a method tailored to the requirements of safety-critical embedded automotive software/DC) objective for automotive safety-critical software. CTMCONTROL is validated via a controlled experiment which

  7. Fabrication of Superhydrophobic Fiber Coatings by DC-Biased AC-Electrospinning

    E-Print Network [OSTI]

    Tafreshi, Hooman Vahedi

    Fabrication of Superhydrophobic Fiber Coatings by DC-Biased AC-Electrospinning Fredrick O. Ochanda DC-biased AC-electrospinning. Superhydrophobic surfaces with water contact angles greater than 150 on superhydrophobicity. VC 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 1112­1119, 2012 Key words: superhydrophobic

  8. Fabrication of Superhydrophobic Fiber Coatings by DC-Biased AC-Electrospinning

    E-Print Network [OSTI]

    Tafreshi, Hooman Vahedi

    Fabrication of Superhydrophobic Fiber Coatings by DC-Biased AC-Electrospinning Fredrick O. Ochanda DC-biased AC-electrospinning. Superhydrophobic surfaces with water contact angles greater than 150 Superhydrophobicity is achieved by combining nano- or microscale roughness with a low-surface free energy material

  9. Dynamics of Three-Dimensional Vesicles in DC Electric fields

    E-Print Network [OSTI]

    Ebrahim M. Kolahdouz; David Salac

    2015-03-02T23:59:59.000Z

    A numerical and systematic parameter study of three-dimensional vesicle electrohydrodynamics is presented to investigate the effects of different fluid and membrane properties. The dynamics of vesicles in the presence of DC electric fields is considered, both in the presence and absence of linear shear flow. For suspended vesicles it is shown that the conductivity ratio and viscosity ratio between the interior and exterior fluids, as well as the vesicle membrane capacitance, substantially affect the minimum electric field strength required to induce a full Prolate-Oblate-Prolate transition.In addition, there exists a critical electric field strength above which a vesicle will no longer tumble when exposed to linear shear flow.

  10. Possible temperature control DC switch effect between two superconductors

    E-Print Network [OSTI]

    Tian De Cao

    2011-08-11T23:59:59.000Z

    The lifetime of an electron pair could not be unlimited long, on the basis of this, we suggest a model. The model means that the movements of charge carriers in a superconductor should have three forms: the single-electron movement, the single-pair movement, and the revolving around the mass center of two electrons in a pair. Thus the current in a superconductor has three possible parts. Similarly, there should be three possible effects in a SIS junction: the tunneling of single electron, the tunneling of single pair, and the pair-forming following the pair-breaking. This paper will discuss these problems and present a possible temperature control DC switch effect between two superconductors.

  11. Generating expansion model incorporating compact DC power flow equations

    SciTech Connect (OSTI)

    Nderitu, D.G.; Sparrow, F.T.; Yu, Z. [Purdue Inst. for Interdisciplinary Engineering Studies, West Lafayette, IN (United States)

    1998-12-31T23:59:59.000Z

    This paper presents a compact method of incorporating the spatial dimension into the generation expansion problem. Compact DC power flow equations are used to provide real-power flow coordination equations. Using these equations the marginal contribution of a generator to th total system loss is formulated as a function of that generator`s output. Incorporating these flow equations directly into the MIP formulation of the generator expansion problem results in a model that captures a generator`s true net marginal cost, one that includes both the cost of generation and the cost of transport. This method contrasts with other methods that iterate between a generator expansion model and an optimal power flow model. The proposed model is very compact and has very good convergence performance. A case study with data from Kenya is used to provide a practical application to the model.

  12. Superconducting DC and RF Properties of Ingot Niobium

    SciTech Connect (OSTI)

    Pashupati Dhakal, Gianluigi Ciovati, Peter Kneisel, Ganapati Rao Myneni

    2011-07-01T23:59:59.000Z

    The thermal conductivity, DC magnetization and penetration depth of large-grain niobium hollow cylindrical rods fabricated from ingots, manufactured by CBMM subjected to chemical and heat treatment were measured. The results confirm the influence of chemical and heat-treatment processes on the superconducting properties, with no significant dependence on the impurity concentrations in the original ingots. Furthermore, RF properties, such as the surface resistance and quench field of the niobium rods were measured using a TE{sub 011} cavity. The hollow niobium rod is the center conductor of this cavity, converting it to a coaxial cavity. The quench field is limited by the critical heat flux through the rods' cooling channel.

  13. Thermal cum DC Camouflage in Duet with Undecorated Natural Materials

    E-Print Network [OSTI]

    Yang, Tian-Zhi; Gao, Dongliang; Wu, Linzhi; Li, Baowen; Thong, John T L; Qiu, Cheng-Wei

    2015-01-01T23:59:59.000Z

    To manipulate various types of physical signals in one single device has long captivated the attention of scientists and engineers. This however is very challenging, if not impossible, even for emerging metamaterials. Up to date, many artificial materials have been proposed, theoretically and (or) experimentally, for manipulating various waves/signals on a one-function-one-device basis. In this work, for the very first time, we employ undecorated natural materials to experimentally demonstrate a simultaneous camouflage for thermal current and electric dc current on the same device. It demonstrates how ingenuity can overcome the limitations of natural material systems without the need for complex decoration to impart inhomogeneous and (or) anisotropic properties, which was previously considered impossible to accomplish except by using metamaterials.

  14. Discharging a DC bus capacitor of an electrical converter system

    DOE Patents [OSTI]

    Kajouke, Lateef A; Perisic, Milun; Ransom, Ray M

    2014-10-14T23:59:59.000Z

    A system and method of discharging a bus capacitor of a bidirectional matrix converter of a vehicle are presented here. The method begins by electrically shorting the AC interface of the converter after an AC energy source is disconnected from the AC interface. The method continues by arranging a plurality of switching elements of a second energy conversion module into a discharge configuration to establish an electrical current path from a first terminal of an isolation module, through an inductive element, and to a second terminal of the isolation module. The method also modulates a plurality of switching elements of a first energy conversion module, while maintaining the discharge configuration of the second energy conversion module, to at least partially discharge a DC bus capacitor.

  15. Reduction of DC-link Capacitor in Case of Cascade Multilevel Converters by means of Reactive Power

    E-Print Network [OSTI]

    Teodorescu, Remus

    to integrate wind generator to multi- terminal dc collection network are few such examples. The basic block

  16. A preliminary analysis of league bowlers, casual bowlers, and non-bowlers in the Dallas-Fort Worth metropolian area

    E-Print Network [OSTI]

    Lawrence, Larry Ray

    1977-01-01T23:59:59.000Z

    -Fort Worth metropolitan area. The differ nce in the age of the classif. ications of bowlers would seem to indicate that, new sources of revenue lie with the young casual bowler. 1f proprietors can convert the young casual bowlers to young league bowlers... the apparatus of a game very similar to modern day bowling. Sir Flinders of Petrie, emeritus professor o f Egyptology, the Univer- sity of London, found nine pieces of stone, used as pins and a stone ball (The National Bowling Council, 1974) The parishioners...

  17. Western Area Power Administration

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

    29-30, 2011 2 Agenda * Overview of Western Area Power Administration * Post-1989 Loveland Area Projects (LAP) Marketing Plan * Energy Planning and Management Program * Development...

  18. Development of Low-Voltage and Large Current DC Power Supply with High-Frequency Transformer Coupling

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    Development of Low-Voltage and Large Current DC Power Supply with High-Frequency Transformer excellent performance. Keywords DC power supply, low-voltage and large-current, high-frequency transformer Iobe (MACOHO Co., Ltd.) Abstract This paper describes low-voltage and large-current DC power supplies

  19. Investigations of Atmospheric and Plant Physiological Effects along an Urban-To-Rural Gradient in the Houston Metropolitan Area Comparing 2011 to 2012 

    E-Print Network [OSTI]

    Gramann, Jonathan

    2014-09-02T23:59:59.000Z

    of oak trees near each weather station were measured on periodic field trips throughout the growing season. Comparisons of temperature, rainfall, carbon dioxide, and ozone concentrations indicate that urbanization is a possible but imperfect proxy...

  20. Effects of urban land cover modifications in a mesoscale meteorological model on surface temperature and heat fluxes in the Phoenix metropolitan area.

    E-Print Network [OSTI]

    Hall, Sharon J.

    in the modeling domain was calculated as part of the energy balance equation according to: E = a C CuM[qs(Tg) -qs MM5. The single urban category in the existing 25-category United States Geological Survey (USGS surface energy fluxes and ground temperature. Planetary boundary layer processes were included via the MRF

  1. Investigation of surface inhomogeneity and estimation of the GOES skin temperature assimilation errors of the MM5 implied by the inhomogeneity over Houston metropolitan area

    E-Print Network [OSTI]

    Han, Sang-Ok

    2005-11-01T23:59:59.000Z

    This study developed a parameterization method to investigate the impacts of inhomogeneous land surfaces on mesoscale model simulations using a high-resolution 1-d PBL model. Then, the 1-d PBL model was used to investigate the inhomogeneity...

  2. Evaluation of the volatility basis-set approach for the simulation of organic aerosol formation in the Mexico City metropolitan area

    E-Print Network [OSTI]

    Tsimpidi, A. P.

    New primary and secondary organic aerosol modules have been added to PMCAMx, a three dimensional chemical transport model (CTM), for use with the SAPRC99 chemistry mechanism based on recent smog chamber studies. The new ...

  3. Hydrologically Sensitive Areas: Variable Source Area Hydrology

    E-Print Network [OSTI]

    Walter, M.Todd

    Hydrologically Sensitive Areas: Variable Source Area Hydrology Implications for Water Quality Risk hydrology was developed and applied to the New York City (NYC) water supply watersheds. According and are therefore hydrologically sensitive with respect to their potential to transport contaminants to perennial

  4. AREA COORDINATOR RESIDENTIAL EDUCATION

    E-Print Network [OSTI]

    Bordenstein, Seth

    AREA COORDINATOR RESIDENTIAL EDUCATION VANDERBILT UNIVERSITY, NASHVILLE, TENNESSEE The Office of Housing and Residential Education at Vanderbilt University is seeking applicants for an Area Coordinator. The Area Coordinator is responsible for assisting in the management and operation of a residential area

  5. Impact of quasi-dc currents on three-phase distribution transformer installations

    SciTech Connect (OSTI)

    McConnell, B.W.; Barnes, P.R. (Oak Ridge National Lab., TN (United States)); Tesche, F.M. (Tesche (F.M.), Dallas, TX (United States)); Schafer, D.A. (Mission Research Corp., Albuquerque, NM (United States))

    1992-06-01T23:59:59.000Z

    This report summarizes a series of tests designed to determine the response of quasi-dc currents on three-phase power distribution transformers for electric power systems. In general, if the dc injection is limited to the primary side of a step-down transformer, significant harmonic distortion is noted and an increase in the reactive power demand results. For dc injection on the secondary (load) side of the step-down transformer the harmonic content at the secondary side is quite high and saturation occurs with a relatively low level of dc injection; however, the reactive power demand is significantly lower. These tests produced no apparent damage to the transformers. Transformer damage is dependent on the duration of the dc excitation, the level of the excitation, and on thermal characteristics of the transfer. The transformer response time is found to be much shorter than seen in power transformer tests at lower dc injection levels. This shorter response time suggests that the response time is strongly dependent on the injected current levels, and that higher levels of dc injection for shorter durations could produce very high reactive power demands and harmonic distortion within a few tenths of a second. The added reactive power load could result in the blowing of fuses on the primary side of the transformer for even moderate dc injection levels, and neutral currents are quite large under even low-level dc injection. This smoking neutral'' results in high-level harmonic injection into equipment via the neutral and in possible equipment failure.

  6. The smoothing transformer, a new concept in dc side harmonic reduction of HVdc schemes

    SciTech Connect (OSTI)

    Enright, W.; Arrillaga, J.; Wood, A.R.; Hidalgo, F.P.

    1996-10-01T23:59:59.000Z

    Direct connection schemes have been a subject of recent investigation, offering operational flexibility and substantial reductions in ac components. In these schemes the use of active dc filters has been suggested to replace the conventional tuned passive filter design. This paper presents the smoothing transformer as a new means for reducing dc harmonics at characteristic and non-characteristic frequencies using only passive components. A realistic smoothing transformer design is examined using the New Zealand HVdc system operating in the direct connection mode. The steady-state and transient performance of the smoothing transformer design is compared with that of the existing dc smoothing reactor and filter bank.

  7. Thermodynamic and quantum bounds on nonlinear DC thermoelectric transport

    E-Print Network [OSTI]

    Robert S. Whitney

    2013-03-05T23:59:59.000Z

    I consider the non-equilibrium DC transport of electrons through a quantum system with a thermoelectric response. This system may be any nanostructure or molecule modeled by the nonlinear scattering theory which includes Hartree-like electrostatic interactions exactly, and certain dynamic interaction effects (decoherence and relaxation) phenomenologically. This theory is believed to be a reasonable model when single-electron charging effects are negligible. I derive three fundamental bounds for such quantum systems coupled to multiple macroscopic reservoirs, one of which may be superconducting. These bounds affect nonlinear heating (such as Joule heating), work and entropy production. Two bounds correspond to the first law and second law of thermodynamics in classical physics. The third bound is quantum (wavelength dependent), and is as important as the thermodynamic ones in limiting the capabilities of mesoscopic heat-engines and refrigerators. The quantum bound also leads to Nernst's unattainability principle that the quantum system cannot cool a reservoir to absolute zero in a finite time, although it can get exponentially close.

  8. DC switching regulated power supply for driving an inductive load

    DOE Patents [OSTI]

    Dyer, George R. (Norris, TN)

    1986-01-01T23:59:59.000Z

    A power supply for driving an inductive load current from a dc power supply hrough a regulator circuit including a bridge arrangement of diodes and switching transistors controlled by a servo controller which regulates switching in response to the load current to maintain a selected load current. First and second opposite legs of the bridge are formed by first and second parallel-connected transistor arrays, respectively, while the third and fourth legs of the bridge are formed by appropriately connected first and second parallel connected diode arrays, respectively. The regulator may be operated in three "stages" or modes: (1) For current runup in the load, both first and second transistor switch arrays are turned "on" and current is supplied to the load through both transistor arrays. (2) When load current reaches the desired level, the first switch is turned "off", and load current "flywheels" through the second switch array and the fourth leg diode array connecting the second switch array in series with the load. Current is maintained by alternating between modes 1 and 2 at a suitable duty cycle and switching rate set by the controller. (3) Rapid current rundown is accomplished by turning both switch arrays "off", allowing load current to be dumped back into the source through the third and fourth diode arrays connecting the source in series opposition with the load to recover energy from the inductive load. The three operating states are controlled automatically by the controller.

  9. A Very Low-Luminosity, Very Cool, DC White Dwarf

    E-Print Network [OSTI]

    Hugh Harris; Conard Dahn; Frederick Vrba; Arne Henden; James Liebert; Gary Schmidt; Neill Reid

    1999-06-03T23:59:59.000Z

    The star LHS 3250 is found to be a white dwarf at a distance of 30 pc. Its absolute magnitudes (M_V = 15.72; M_bol = 16.2) put it among the least-luminous white dwarfs known. Its optical spectrum shows no features, indicating it has a DC classification, and it shows no detectable polarization, indicating it does not have a very strong magnetic field. However, its broadband colors show it to have a unique spectral energy distribution, and it stands out from all other stars in BVI and other broadband photometric surveys. We discuss these properties, and conclude that LHS 3250 must be an extremely cool white dwarf with strong collision-induced absorption at red-infrared wavelengths from molecular hydrogen, in accord with models for very cool white dwarf atmospheres. If so, it is the first such star known, and the first star to provide observational evidence supporting these models. It suggests that other very cool white dwarfs, both halo white dwarfs and the oldest disk white dwarfs, also may have colors affected by similar absorption. The atmospheric composition of LHS 3250 is not known, and therefore its temperature is poorly determined. It may be a helium-core star with a mass 0.3-0.45 M_solar and a product of mass-transfer in a close binary system. However, until its temperature is better known, its mass and age remain uncertain.

  10. Systems and Control Systems and Control is an area of study within mechanical engineering that integrates the basic

    E-Print Network [OSTI]

    New Hampshire, University of

    Systems and Control Systems and Control is an area of study within mechanical engineering, into a methodology that can be used to design complex interdisciplinary systems. Examples include: position control of antenna, modeling of a train breaking system, modeling of a brushless DC motor, control of a remote

  11. Multilevel-Dc-Bus Inverter For Providing Sinusoidal And Pwm Electrical Machine Voltages

    DOE Patents [OSTI]

    Su, Gui-Jia [Knoxville, TN

    2005-11-29T23:59:59.000Z

    A circuit for controlling an ac machine comprises a full bridge network of commutation switches which are connected to supply current for a corresponding voltage phase to the stator windings, a plurality of diodes, each in parallel connection to a respective one of the commutation switches, a plurality of dc source connections providing a multi-level dc bus for the full bridge network of commutation switches to produce sinusoidal voltages or PWM signals, and a controller connected for control of said dc source connections and said full bridge network of commutation switches to output substantially sinusoidal voltages to the stator windings. With the invention, the number of semiconductor switches is reduced to m+3 for a multi-level dc bus having m levels. A method of machine control is also disclosed.

  12. Development and evaluation of an implantable chronic DC stimulation and measurement probe for nerve regeneration studies 

    E-Print Network [OSTI]

    Macha, Douglas Bryan

    1995-01-01T23:59:59.000Z

    isotropic. The actual field strength or current density induced by the applied current is seldom directly measured in-vivo. This research seeks to evaluate the design of an implantable DC stimulator capable of delivering a constant, stable and measurable...

  13. ReHABit : claiming endangered structures in Washington DC to rethink subsidized housing

    E-Print Network [OSTI]

    Fowlkes, Catherine Kuhnle

    2007-01-01T23:59:59.000Z

    There is an affordable housing crisis today in Washington D.C. that is the result of a uniquely complicated history of a capital city and a current economic boom. This thesis responds to that crisis by proposing a new ...

  14. Measured Savings of DC to AC Drive Retrofit in Plastic Extrusion

    E-Print Network [OSTI]

    Sfeir, R. A.

    2008-01-01T23:59:59.000Z

    This paper presents the potential electrical energy efficiency improvements for utilizing alternating current (AC) motors controlled by variable frequency drives (VFD) in place of direct current (DC) motors to drive plastic extrusion machines. A...

  15. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    Model Efficiency a PV Inverter (AC House), includes MPPT DC-into today’s PV-system inverters and is therefore omittedinterviewed. c Today’s PV-system inverter minus the MPPT,

  16. D.C. Middle and High School Students Get a Chance to Experience...

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

    and Community Development Have you ever heard of the Washington, D.C. regional science bowl competition? Are you a teacher or a middle or high school student looking for...

  17. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    a-vis the impact of partial loads on power system componentto test the effect of partial load conditions and possibleto direct-DC savings. Partial load effects reduce estimates

  18. Vehicle Technologies Office Merit Review 2015: High Performance DC Bus Film Capacitor

    Broader source: Energy.gov [DOE]

    Presentation given by GE Global Research at 2015 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high performance DC bus...

  19. Over-Current Protection Scheme for SiC Power MOSFET DC Circuit Breaker

    E-Print Network [OSTI]

    Zhang, Yuan; Liang, Yung C.

    2015-01-01T23:59:59.000Z

    V. Radun, “SiC based solid state power controller,” in 23tha solid-state circuit breaker based on SiC power MOSFET withSolid-state DC circuit breakers made of the modern wide bandgap power

  20. Application to Export Electric Energy OE Docket No. EA-351 DC...

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

    DC Energy Dakota, LLC Application to export electric energy OE Docket No. EA-210-B PPL EnergyPlus, LLC Application to Export Electric Energy OE Docket No. EA-354 Endure...

  1. Low speed control of a DC motor driving a mechanical system with fuzzy adaptive compensation 

    E-Print Network [OSTI]

    Hyun, Dongyoon

    1997-01-01T23:59:59.000Z

    A fuzzy adaptive feedforward control scheme in conjunction with classical feedback control is proposed for the low speed control of DC motors driving mechanical systems in the presence of friction. In the fuzzy adaptive scheme, a fuzzy logic based...

  2. Washington, D.C. : essays on the city form of a capital

    E-Print Network [OSTI]

    Kousoulas, George

    1985-01-01T23:59:59.000Z

    This thesis is an exploration of the city form of Washington. D.C. through four independent essays. Each essay examines a different aspect of the city: its monumentality as determined by its relationship with the nation ...

  3. DC-OPF Formulation with Price-Sensitive Demand Bids Junjie Sun and Leigh Tesfatsion

    E-Print Network [OSTI]

    Tesfatsion, Leigh

    DC-OPF Formulation with Price-Sensitive Demand Bids Junjie Sun and Leigh Tesfatsion Last Revised (TNCS) subject to various transmission constraints. As explained at length in Sun and Tesfation (2007

  4. Vehicle Technologies Office Merit Review 2014: High Performance DC Bus Film Capacitor

    Broader source: Energy.gov [DOE]

    Presentation given by GE Global Research at 2014 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Office Annual Merit Review and Peer Evaluation Meeting about high performance DC bus...

  5. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    wind/fuel cell hybrid energy systems. Energy and Buildings,National Energy Modeling System PHEV plug-in hybrid electrica hybrid DC and AC power system that included energy storage

  6. Effects of stray DC currents on the performance of large core type transformers

    SciTech Connect (OSTI)

    Christini, J.M.; Girgis, R.S. (ABB Power and Company, Inc., Muncie, IN (US))

    1992-01-01T23:59:59.000Z

    This paper presents the results of a study made on the effects of stray DC current on power transformer performance. A circuit model was developed to analyze the magnetic behavior of three-phase five-leg core type transformers. The magnetic field distribution was obtained for several different operating conditions by taking into account core geometry, core design, magnitude of D.C. current, and magnitude of A.C. voltage. The change in transformer performance is discussed.

  7. Nonlinear modal interaction in HVDC/AC power systems with dc power modulation

    SciTech Connect (OSTI)

    Ni, Y.X. [Tsinghua Univ., Beijing (China)] [Tsinghua Univ., Beijing (China); Vittal, V.; Kliemann, W.; Fouad, A.A. [Iowa State Univ., Ames, IA (United States)] [Iowa State Univ., Ames, IA (United States)

    1996-11-01T23:59:59.000Z

    In this paper investigation of nonlinear modal interaction using the normal form of vector fields technique is extended to HVDC/AC power systems with dc power modulation. The ac-dc interface equations are solved to form a state space model with second order approximation. Using the normal form technique, the system`s nonlinear dynamic characteristics are obtained. The proposed approach is applied to a 4-generator HVDC/AC test power system, and compare with the time domain solution.

  8. Wetland Preservation Areas (Minnesota)

    Broader source: Energy.gov [DOE]

    A wetland owner can apply to the host county for designation of a wetland preservation area. Once designated, the area remains designated until the owner initiates expiration, except where a state...

  9. Protected Areas Stacy Philpott

    E-Print Network [OSTI]

    Gottgens, Hans

    · Convention of Biological Diversity, 1992 #12;IUCN Protected Area Management Categories Ia. Strict Nature. Protected Landscape/ Seascape VI. Managed Resource Protected Area #12;Ia. Strict Nature Preserves and Ib. Wilderness Areas · Natural preservation · Research · No · No #12;II. National Parks · Ecosystem protection

  10. Service Entry Delivery Area

    E-Print Network [OSTI]

    New South Wales, University of

    Catheter Lab Boiler House Main Entry Short Street ChapelStreet Vehicle Exit 23. Gray Street Car ParkingService Entry Waste Handling Area Delivery Area Admissions Entrance Inquiries Desk Cafeteria Coffee in July 2000 Vehicle Entry Emergency Main Entrance TOKOGARAHRAILWAYSTATION LEGEND Areas under construction

  11. Use of Management and Operating Contractor and National Laboratory Employees for Services in the D.C. Area

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1997-03-05T23:59:59.000Z

    This Notice provides requirements for Headquarters use of employees from Management and Operating (M&O) contractors and National Laboratories and establishes limitations on payments to those employees whose assignments to Headquarters exceed 365 days.

  12. A body area network for wearable health monitoring : conductive fabric garment utilizing DC-power-line carrier communication

    E-Print Network [OSTI]

    Wade, Eric R. (Eric Randolph), 1978-

    2007-01-01T23:59:59.000Z

    Wearable computing applications are becoming increasingly present in our lives. Of the many wearable computing applications, wearable health monitoring may have the most potential to make a lasting positive impact. The ...

  13. Gaseous and particulate emissions from a DC arc melter

    SciTech Connect (OSTI)

    Overcamp, T.J.; Speer, M.P.; Griner, S.J.; Cash, D.M. [Clemson Univ., Anderson, SC (United States)

    1997-12-31T23:59:59.000Z

    This paper presents the results of the gaseous and particulate emissions from eight experimental tests of a DC arc melter to treat simulated Savannah River soils contaminated with metals, surrogates for radionuclides, and organic debris. The gaseous analyses reported on the concentrations of oxygen, hydrogen, carbon monoxide, carbon dioxide, hydrogen, methane, nitric oxide, and nitrogen dioxide. The carbon dioxide concentration was high for all runs. For the runs with an air purge, the carbon monoxide concentration ranged up to 10% in the runs with the debris and 2% in the runs without debris. Hydrogen ranged up to 5% by with debris and up to 1% without debris. The methane concentration ranged up to 7,000 ppm{sub v} for the runs with debris and 2,000 ppm for the runs without debris. With a nitrogen purge, oxygen concentrations were less than 1%. The carbon dioxide concentrations ranged from 3 to 15%. Much of this carbon dioxide was probably due the carbonates added to the feed material. The carbon monoxide concentration ranged up to 20% with the debris and 7% without debris. Hydrogen was above 6% in with debris and up to 6% without debris. The methane concentration ranged up to 10,000 ppm{sub v} with debris and 4,000 ppm{sub v} without debris. The particulate concentrations exiting ranged from 32 to 145 g/m{sup 3}. From the chemical analyses, the primary elements were silicon and calcium. The CHN analyses indicated that carbon, probably as carbonates, are an additional component in the particulate matter. The estimated emissions were at a level of 3% or less for cerium, up to 7% for nickel, and 11 to 30% for cesium.

  14. The effect of urban canopy parameterizations on mesoscale meteorological model simulations in the Paso del Norte area

    SciTech Connect (OSTI)

    Brown, M.J.; Williams, M.D.

    1997-04-01T23:59:59.000Z

    Since mesoscale numerical models do not have the spatial resolution to directly simulate the fluid dynamics and thermodynamics in and around urban structures, urban canopy parameterizations are sometimes used to approximate the drag, heating, and enhanced turbulent kinetic energy (tke) produced by the sub-grid scale urban elements. In this paper, we investigate the effect of the urban canopy parameterizations used in the HOTMAC mesoscale meteorological model by turning the parameterizations on and off. The model simulations were performed in the Paso del Norte region, which includes the cities of El Paso and Ciudad Juarez, the Franklin and Sierra Juarez mountains, and the Rio Grande. The metropolitan area is surrounded by relatively barren scrubland and is intersected by strips of vegetation along the Rio Grande. Results indicate that the urban canopy parameterizations do affect the mesoscale flow field, reducing the magnitude of wind speed and changing the magnitude of the sensible heat flux and tke in the metropolitan area. A nighttime heat island and a daytime cool island exist when urban canopy parameters are turned on, but associated recirculation flows are not readily apparent. Model-computed solar, net, and longwave radiation values look reasonable, agreeing for the most part with published measurements.

  15. Optimizing Energy Savings from Direct-DC in U.S. Residential Buildings

    SciTech Connect (OSTI)

    Garbesi, Karina; Vossos, Vagelis; Sanstad, Alan; Burch, Gabriel

    2011-10-13T23:59:59.000Z

    An increasing number of energy efficient appliances operate on direct current (DC) internally, offering the potential to use DC from renewable energy systems directly and avoiding the losses inherent in converting power to alternating current (AC) and back. This paper investigates that potential for net-metered residences with on-site photovoltaics (PV) by modeling the net power draw of the ‘direct-DC house’ with respect to today’s typical configuration, assuming identical DC-internal loads. Power draws were modeled for houses in 14 U.S. cities, using hourly, simulated PV-system output and residential loads. The latter were adjusted to reflect a 33% load reduction, representative of the most efficient DC-internal technology, based on an analysis of 32 electricity end-uses. The model tested the effect of climate, electric vehicle (EV) loads, electricity storage, and load shifting on electricity savings; a sensitivity analysis was conducted to determine how future changes in the efficiencies of power system components might affect savings potential. Based on this work, we estimate that net-metered PV residences could save 5% of their total electricity load for houses without storage and 14% for houses with storage. Based on residential PV penetration projections for year 2035 obtained from the National Energy Modeling System (2.7% for the reference case and 11.2% for the extended policy case), direct-DC could save the nation 10 trillion Btu (without storage) or 40 trillion Btu (with storage). Shifting the cooling load by two hours earlier in the day (pre-cooling) has negligible benefits for energy savings. Direct-DC provides no energy savings benefits for EV charging, to the extent that charging occurs at night. However, if charging occurred during the day, for example with employees charging while at work, the benefits would be large. Direct-DC energy savings are sensitive to power system and appliance conversion efficiencies but are not significantly influenced by climate. While direct-DC for residential applications will most likely arise as a spin-off of developments in the commercial sector—because of lower barriers to market entry and larger energy benefits resulting from the higher coincidence between load and insolation—this paper demonstrates that there are substantial benefits in the residential sector as well. Among residential applications, space cooling derives the largest energy savings from being delivered by a direct-DC system. It is the largest load for the average residence on a national basis and is particularly so in high-load regions. It is also the load with highest solar coincidence.

  16. Development of Low-Voltage and Large-Current DC Power Supply with High-Frequency Transformer Coupling

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    Development of Low-Voltage and Large-Current DC Power Supply with High-Frequency Transformer-voltage and large-current DC power supply with a high-frequency transformer coupling. The power supply is simply·,Zü"gg"X·C~R,êC"_N^"X Keywords: DC power supply, low-voltage and large-current, high-frequency transformer, leakage inductance 1

  17. Plasma Chemistry and Plasma Processing, Vol. 23, No. 1, March 2003 ( 2003) Model of the Negative DC Corona Plasma

    E-Print Network [OSTI]

    Chen, Junhong

    Plasma Chemistry and Plasma Processing, Vol. 23, No. 1, March 2003 ( 2003) Model of the Negative DC Corona Plasma: Comparison to the Positive DC Corona Plasma Junhong Chen1 and Jane H. Davidson1,2 Receiûed March 26, 2002, reûised June 14, 2002 A numerical model of the negatiûe DC corona plasma along a thin

  18. Groundwater Management Areas (Texas)

    Broader source: Energy.gov [DOE]

    This legislation authorizes the Texas Commission on Environmental Quality and the Texas Water Development Board to establish Groundwater Management Areas to provide for the conservation,...

  19. Riparian Area. . . . . . . . . . . . . . . . . . . . Management Handbook

    E-Print Network [OSTI]

    Balasundaram, Balabhaskar "Baski"

    ..............................................................................................................19 Bruce Hoagland, Oklahoma Biological Survey and the University of Oklahoma Forest Management Riparian Area. . . . . . . . . . . . . . . . . . . . Management Handbook E-952 Oklahoma Cooperative . . . . . . . . . . . . . Oklahoma Conservation Commission Management Handbook #12

  20. DC WRRC Report No. 170 Program ReportAnnual

    E-Print Network [OSTI]

    District of Columbia, University of the

    and the Bay's ecosystem; There have been agreements on fisheries management, wetland, and toxics reduction as a result of the phosphate detergent ban and tighter sewage treatment plant controls. - Feasibility Study surrounding and underlying a wetland, as well as the driving force or hydraulic gradients in the area

  1. Self-stabilized nonlinear lateral modes of broad area lasers

    SciTech Connect (OSTI)

    Mehuys, D.; Lang, R.J.; Mittelstein, M.; Salzman, J.; Yariv, A.

    1987-11-01T23:59:59.000Z

    The lateral modes of broad area lasers are investigated theoretically. The nonlinear interaction between optical field and effective refractive index lead to a saturable nonlinearity in the governing field equation, so that self-modulated solutions are found to be stable with increased current injection above saturation intensity. The authors derive approximate analytical solutions for traveling wave fields within the broad area laser. The field amplitude consists of a small ripple superimposed on a large dc value. Matching fields at the boundary determines the modulation depth and imparts an overall phase curvature to the traveling wave mode. There are multiple lateral modes for a given set of operating conditions, and modes with successively more lobes in the ripple have greater overall phase curvature. In contrast to the linear problem, several lateral modes can achieve the same modal gain, for a given injected current density, by saturating the gain to different extent. Thus, these modes would exhibit slightly different optical powers.

  2. Geothermal br Resource br Area Geothermal br Resource br Area...

    Open Energy Info (EERE)

    Zone Mesozoic granite granodiorite Aurora Geothermal Area Aurora Geothermal Area Walker Lane Transition Zone Geothermal Region MW Beowawe Hot Springs Geothermal Area Beowawe Hot...

  3. Wide area augmentation of the Global Positioning System

    SciTech Connect (OSTI)

    Enge, P.; Walter, T.; Pullen, S.; Kee, C.; Chao, Y.C.; Tsai, Y.J. [Stanford Univ., CA (United States). Dept. of Aeronautics and Astronautics] [Stanford Univ., CA (United States). Dept. of Aeronautics and Astronautics

    1996-08-01T23:59:59.000Z

    The Wide Area Augmentation System (WAAS) is being deployed by the Federal Aviation Administration (FAA) to augment the Global Positioning System (GPS). The WAAS will aid GPS with the following three services. First, it will broadcast spread-spectrum ranging signals from communication satellites. The airborne WAAS receiver will add these new ranging signals to the GPS constellation of measurements. By so doing, the augmented position fix will be less sensitive to the failure of individual system components, thus improving time availability and continuity of service. Second, the WAAS will use a nationwide ground network to monitor the health of all satellites over the airspace and flag situations which threaten flight safety. This data will be modulated on to the WAAS ranging signals and broadcast to the users, thereby guaranteeing the integrity of the airborne position fix. Third, the WAAS will use the ground network to develop corrections for the errors which currently limit the accuracy of unaugmented GPS. This data will also be included on the WAAS broadcast and will improve position accuracy from approximately 100 m to 8 m. When complete, the augmented system will provide an accurate position fix from satellites to an unlimited number of aircraft across the nation. It will be the primary navigation system for aircraft in oceanic routes, enroute over domestic airspace, in crowded metropolitan airspaces, and on airport approach.

  4. Development of 500 kV DC PPLP-insulated oil-filled submarine cable

    SciTech Connect (OSTI)

    Fujimori, A. [Kansai Electric Power Co., Inc., Osaka (Japan)] [Kansai Electric Power Co., Inc., Osaka (Japan); Tanaka, T. [Electric Power Development Co., Ltd., Tokyo (Japan)] [Electric Power Development Co., Ltd., Tokyo (Japan); Takashima, H. [Shikoku Electric Power Co., Inc., Kagawa (Japan)] [Shikoku Electric Power Co., Inc., Kagawa (Japan); Imajo, T. [Central Research Inst. of Electric Power Industry, Tokyo (Japan)] [Central Research Inst. of Electric Power Industry, Tokyo (Japan); Hata, R. [Sumitomo Electric Industries, Ltd., Osaka (Japan)] [Sumitomo Electric Industries, Ltd., Osaka (Japan); Tanabe, T. [Furukawa Electric Co., Ltd., Tokyo (Japan)] [Furukawa Electric Co., Ltd., Tokyo (Japan); Yoshida, S. [Fujikura, Ltd., Tokyo (Japan)] [Fujikura, Ltd., Tokyo (Japan); Kakihana, T. [Hitachi Cable, Ltd., Tokyo (Japan)] [Hitachi Cable, Ltd., Tokyo (Japan)

    1996-01-01T23:59:59.000Z

    This paper outlines the development of a 500 kV DC oil-filled submarine cable capable of transmitting 2,800 MW with {+-} 500 kV 2800A bipole system. Polypropylene Laminated Paper (PPL) was employed as the insulation material, which is the worlds first application to DC cables. The conductor size is 3,000 mm{sup 2}, which is the largest size for submarine cables ever put into practical use. Through various fundamental and prototype tests, the cable proved to have excellent electrical characteristics for DC voltage as well as transient overvoltage. The cable and accessories are currently undergoing a long-term accelerated aging test as the final confirmation of their reliability and stability.

  5. Solid Silicone Elastomer Material(DC745U)-Historical Overview and New Experimental Results

    SciTech Connect (OSTI)

    Ortiz-Acosta, Denisse [Los Alamos National Laboratory

    2012-08-08T23:59:59.000Z

    DC745U is a silicone elastomer used in several weapon systems. DC745U is manufactured by Dow Corning and its formulation is proprietary. Risk changes without notification to the customer. {sup 1}H and {sup 29}Si{l_brace}{sup 1}H{r_brace} NMR have previously determined that DC745U contains {approx} 98.5% dimethyl siloxane, {approx}1.5% methyl-phenyl siloxane, and a small amount (<1%) of vinyl siloxane repeat units that are converted to crosslinking sites. The polymer is filled with {approx} 38 wt.% of a mixture of fumed silica and quartz. Some conclusions are: (1) DMA shows that crystallization does have an effect on the mechanical properties of DC745U; (2) DMA shows that the crystallization is time and temperature dependent; (3) Mechanical tests show that DC745U undergo a crystalline transition at temperatures below -50 C; (4) Rate and temperature does not have an effect above crystalline transition; (5) Crystalline transition occurs faster at colder temperatures; (6) The material remains responsive and recovers after warming it to temperature above -40 C; (7) We were able to review all previous historical data on DC745U; (8) Identified specific gaps in materials understanding; (9) Developed design of experiments and testing methods to address gaps associated with post-curing and low temperature mechanical behavior; (10) Resolved questions of post-cure and alleviated concerns associated with low temperature mechanical behavior with soak time and temperature; and (11) This work is relevant to mission-critical programs and for supporting programmatic work for weapon research.

  6. Stabilizing sliding mode control design and application for a dc motor: Speed control

    E-Print Network [OSTI]

    Rhif, Ahmed

    2012-01-01T23:59:59.000Z

    The regulation by sliding mode control (SMC) is recognized for its qualities of robustness and dynamic response. This article will briefly talk about the regulation principles by sliding mode as well as the application of this approach to the adjustment of a speed control DC motor bench using the TY36A/EV unit. This unit, from Electronica Veneta products, uses a PID controller to control the speed and position of the DC motor. Our purpose is to improve the set time answer and the robustness of the system when disturbances take place. The experimental results show very good performances of the proposed approach relatively to the PID.

  7. 300 AREA URANIUM CONTAMINATION

    SciTech Connect (OSTI)

    BORGHESE JV

    2009-07-02T23:59:59.000Z

    {sm_bullet} Uranium fuel production {sm_bullet} Test reactor and separations experiments {sm_bullet} Animal and radiobiology experiments conducted at the. 331 Laboratory Complex {sm_bullet} .Deactivation, decontamination, decommissioning,. and demolition of 300 Area facilities

  8. Decontamination & decommissioning focus area

    SciTech Connect (OSTI)

    NONE

    1996-08-01T23:59:59.000Z

    In January 1994, the US Department of Energy Office of Environmental Management (DOE EM) formally introduced its new approach to managing DOE`s environmental research and technology development activities. The goal of the new approach is to conduct research and development in critical areas of interest to DOE, utilizing the best talent in the Department and in the national science community. To facilitate this solutions-oriented approach, the Office of Science and Technology (EM-50, formerly the Office of Technology Development) formed five Focus AReas to stimulate the required basic research, development, and demonstration efforts to seek new, innovative cleanup methods. In February 1995, EM-50 selected the DOE Morgantown Energy Technology Center (METC) to lead implementation of one of these Focus Areas: the Decontamination and Decommissioning (D & D) Focus Area.

  9. SAIL Venture Partners (Washington DC) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ |Rippey Jump to:WY) JumpLand Focus AreaGeothermalSAIL

  10. DC Resistivity Survey (Schlumberger Array) At Roosevelt Hot Springs

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew|CoreCpWingCushing,DA (DistributionGeothermal Area (Ward,

  11. DC Resistivity Survey (Schlumberger Array) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew|CoreCpWingCushing,DA (DistributionGeothermal Area (Ward,

  12. Physics Thrust Areas

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for RenewableSpeedingBiomassPPPOPetroleum ReservesThrust Areas Physics Thrust Areas

  13. New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos Jr.

    E-Print Network [OSTI]

    Zhou, Yaoqi

    New Power Electronics Converter Interfacing a Hybrid Dc/Ac Microgrid M. Alibeik, E. C. dos Santos microgrid is that it has higher efficiency and lesser power conversion. In this work is proposed a new integrated power electronics converter able to connect a Distributed Generation (DG) unit with a hybrid dc

  14. Abstract--Environmentally friendly technologies such as photovoltaics and fuel cells are DC sources. In the current power

    E-Print Network [OSTI]

    Tolbert, Leon M.

    Abstract--Environmentally friendly technologies such as photovoltaics and fuel cells are DC sources in pollution [1]. The most well-known green technologies include photovoltaics and wind turbines. Although fuel, fuel cells and photovoltaics, produce direct current (DC). Currently, power system infrastructures

  15. Ver.2003.01.27 Development of Low-Voltage and Large-Current DC Power Supply

    E-Print Network [OSTI]

    Fujimoto, Hiroshi

    describes low-voltage and large-current DC power supplies with a high-frequency transformer coupling. Two Ver.2003.01.27 Development of Low-Voltage and Large-Current DC Power Supply-bridge inverter, an amorphous-core step down transformer and a schottky diode rectifier. One power supply operates

  16. Control of current and voltage oscillations in a short dc discharge making use of external auxiliary electrode

    E-Print Network [OSTI]

    Kaganovich, Igor

    Control of current and voltage oscillations in a short dc discharge making use of external://rsi.aip.org/about/rights_and_permissions #12;REVIEW OF SCIENTIFIC INSTRUMENTS 83, 103502 (2012) Control of current and voltage oscillations October 2012) A dc discharge with a hot cathode is subject to current and voltage plasma oscillations

  17. Dynamic magnetization states of a spin valve in the presence of dc and ac currents: Synchronization, modification, and chaos

    E-Print Network [OSTI]

    Li, Charles

    Dynamic magnetization states of a spin valve in the presence of dc and ac currents: Synchronization and numerical calculations of dynamic magnetization states of a spin valve in the presence of dc and ac currents are expected to appear. In this paper, we consider a simple spin valve as a model system to study the problem

  18. The DC field components of horizontal and vertical electric dipole sources immersed in three-layered stratified media

    E-Print Network [OSTI]

    Boyer, Edmond

    for the solution in the case of horizontal electric dipole (HED) radiation source and the single-component HertzThe DC field components of horizontal and vertical electric dipole sources immersed in three- ponents of the static (DC) fields of horizontal electric dipoles ( HEDs) and vertical electric dipoles

  19. Superconductivity for Electric Systems Annual Peer Review Washington, DC July 27-29, 2004. OAK RIDGE NATIONAL LABORATORY

    E-Print Network [OSTI]

    Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 27-29, 2004. OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY American Superconductor Corporation U. Schoop, M. W&D support #12;Superconductivity for Electric Systems Annual Peer Review Washington, DC ­ July 27-29, 2004

  20. 300 Area Disturbance Report

    SciTech Connect (OSTI)

    LL Hale; MK Wright; NA Cadoret

    1999-01-07T23:59:59.000Z

    The objective of this study was to define areas of previous disturbance in the 300 Area of the U.S. Department of Energy (DOE) Hanford Site to eliminate these areas from the cultural resource review process, reduce cultural resource monitoring costs, and allow cultural resource specialists to focus on areas where subsurface disturbance is minimal or nonexistent. Research into available sources suggests that impacts from excavations have been significant wherever the following construction activities have occurred: building basements and pits, waste ponds, burial grounds, trenches, installation of subsurface pipelines, power poles, water hydrants, and well construction. Beyond the areas just mentioned, substrates in the' 300 Area consist of a complex, multidimen- sional mosaic composed of undisturbed stratigraphy, backfill, and disturbed sediments; Four Geographic Information System (GIS) maps were created to display known areas of disturbance in the 300 Area. These maps contain information gleaned from a variety of sources, but the primary sources include the Hanford GIS database system, engineer drawings, and historic maps. In addition to these maps, several assumptions can be made about areas of disturbance in the 300 Area as a result of this study: o o Buried pipelines are not always located where they are mapped. As a result, cultural resource monitors or specialists should not depend on maps depicting subsurface pipelines for accurate locations of previous disturbance. Temporary roads built in the early 1940s were placed on layers of sand and gravel 8 to 12 in. thick. Given this information, it is likely that substrates beneath these early roads are only minimally disturbed. Building foundations ranged from concrete slabs no more than 6 to 8 in. thick to deeply excavated pits and basements. Buildings constructed with slab foundations are more numerous than may be expected, and minimally disturbed substrates may be expected in these locations. Historic black and white photographs provide a partial record of some excavations, including trenches, building basements, and material lay-down yards. Estimates of excavation depth and width can be made, but these estimates are not accurate enough to pinpoint the exact location where the disturbedhmdisturbed interface is located (e.g., camera angles were such that depths and/or widths of excavations could not be accurately determined or estimated). In spite of these limitations, these photographs provide essential information. Aerial and historic low-level photographs have captured what appears to be backfill throughout much of the eastern portion of the 300 Area-near the Columbia River shoreline. This layer of fill has likely afforded some protection for the natural landscape buried beneath the fill. This assumption fits nicely with the intermittent and inadvertent discoveries of hearths and stone tools documented through the years in this part of the 300 Area. Conversely, leveling of sand dunes appears to be substantial in the northwestern portion of the 300 Area during the early stages of development. o Project files and engineer drawings do not contain information on any impromptu but necessary adjustments made on the ground during project implementation-after the design phase. Further, many projects are planned and mapped but never implemented-this information is also not often placed in project files. Specific recommendations for a 300 Area cultural resource monitoring strategy are contained in the final section of this document. In general, it is recommended that monitoring continue for all projects located within 400 m of the Columbia River. The 400-m zone is culturally sensitive and likely retains some of the most intact buried substrates in the 300 Area.

  1. ccsd00002041, A study of magnetically-supported dc discharge in

    E-Print Network [OSTI]

    essential condition for the technological progress in this branch. The magnetron systems with cylindrical. To prevent overheating the coils and cathode, the system is cooled by water. The apparatus is constructed of magnetically-supported dc discharge in cylindrical coaxial con#12;guration. In the system the electric #12;eld

  2. HIDDEN DAMAGE DETECTION FOR MAIN CABLES OF SUSPENSION BRIDGES INCORPORATING DC MAGNETIZATION WITH A SEARCH COIL-

    E-Print Network [OSTI]

    Boyer, Edmond

    with artificially inflicted broken wires. KEYWORDS : Cable NDE, Search coil, Total flux, DC magnetization, Damage. To overcome this limitation, this study proposes a noncontact cable inspection system incorporating been applied for the inspection of steel cables for ski lifts, elevators, and for other applications

  3. IEEE Photovoltaic Specialists Conference Washington, D.C., May 13-17, 1996

    E-Print Network [OSTI]

    Perez, Richard R.

    IEEE Photovoltaic Specialists Conference Washington, D.C., May 13-17, 1996 NICHE MARKETS FOR GRID-CONNECTED PHOTOVOLTAICS Howard Wenger Pacific Energy Group Walnut Creek, CA, USA Christy Herig & Roger Taylor National- Sited Photovoltaics (CSPV) in the United States. 1 The intent is to demonstrate markets that are cost

  4. Proceedings IEEE International Test Conference, Washington, DC, 1990 Generating Pseudo-Exhaustive Vectors for External Testing

    E-Print Network [OSTI]

    Hellebrand, Sybille

    Proceedings IEEE International Test Conference, Washington, DC, 1990 Generating Pseudo-Exhaustive Vectors for External Testing S. Hellebrand, H.-J. Wunderlich, O. F. Haberl Institute of Computer Design. Germany Abstract In the past years special chips for external test have been suc- cessfully used

  5. Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith

    E-Print Network [OSTI]

    Skogestad, Sigurd

    Control of a Fuel-Cell Powered DC Electric Vehicle Motor Federico Zenith Sigurd Skogestad Introduction Research in fuel cells receives currently a lot of interest. Fuel cells can be used, in different. However, the dynamics of fuel cells has received comparatively less attention. Control of fuel cells

  6. SEC Training -Risk Management Washington, D.C., February 27, 2006

    E-Print Network [OSTI]

    Frey, Robert J.

    SEC Training - Risk Management Washington, D.C., February 27, 2006 Robert J. Frey, Ph.D. Director Managers, pp. IV-3 to IV-9 · Market Risk · Liquidity Risk · Credit Risk · Leverage Risk · Operational Risk · Valuation Risk 10 #12;Monitoring Risk Source: MFA's 2005 Sound Practices for Hedge Fund Managers, pp. AI-1

  7. Griffith 5/2004 UDP-Glucose Dehydrogenase (DH) & UDP-Glucuronic Acid Decarboxylase (DC) Assays

    E-Print Network [OSTI]

    Doering, Tamara

    mM pyruvate solution (Sigma) Lactic acid dehydrogenase (LDH) Phenol pH 4/chloroform/water (0Griffith 5/2004 UDP-Glucose Dehydrogenase (DH) & UDP-Glucuronic Acid Decarboxylase (DC) Assays are looking at interconversion of nucleotide sugars. The LDH and lactic acid dehydrogenase are included

  8. Microprocessor-based random PWM schemes for DC-AC power conversion

    SciTech Connect (OSTI)

    Hui, S.Y.R. [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering] [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering; [City Univ. of Hong Kong, Kowloon (Hong Kong). Dept. of Electronic Engineering; Oppermann, I.; Sathiakumar, S. [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering] [Univ. of Sydney, New South Wales (Australia). Dept. of Electrical Engineering

    1997-03-01T23:59:59.000Z

    Two classes of microprocessor-based random PWM (RPWM) real-time schemes for dc-ac power conversion are compared and evaluated. Performance of the RPWM schemes based on the mathematical and logical approaches is examined. The proposed schemes exhibit excellent harmonic content with all low and high-order harmonics suppressed and are suitable for both MOSFET and IGBT inverters.

  9. February 2012 Did you know that the Navy Memorial in Washington D.C. is

    E-Print Network [OSTI]

    February 2012 004/12 Did you know that the Navy Memorial in Washington D.C. is is honoring all://navymemorial.org/yotc/Home/tabid/224/Default.aspx Challenge to all: in the Navy Log. This is your free opportunity to be entered and activities occurring across our Navy to support YOTC through this Facebook page: http

  10. Operation of the DC current transformer intensity monitors at FNAL during run II

    SciTech Connect (OSTI)

    Crisp, J.; Fellenz, B.; Heikkinen, D.; Ibrahim, M.A.; Meyer, T.; Vogel, G.; /Fermilab

    2012-01-01T23:59:59.000Z

    Circulating beam intensity measurements at FNAL are provided by five DC current transformers (DCCT), one per machine. With the exception of the DCCT in the Recycler, all DCCT systems were designed and built at FNAL. This paper presents an overview of both DCCT systems, including the sensor, the electronics, and the front-end instrumentation software, as well as their performance during Run II.

  11. New Global Alliance Formed to Undercut Illegal WASHINGTON, DC, May 26, 2010 (ENS) -To reduce trade

    E-Print Network [OSTI]

    New Global Alliance Formed to Undercut Illegal Logging WASHINGTON, DC, May 26, 2010 (ENS. "Some companies are not aware of the need to ask questions about the wood they are buying than on the performance of individual companies, and will complement existing initiatives that certify

  12. DC 20 a,f,g AXISYMMETRIC INSTABILITY IN A NONCIRCDLAR TOKAMAK

    E-Print Network [OSTI]

    Sprott, Julien Clinton

    DC 20 a,f,g AXISYMMETRIC INSTABILITY IN A NONCIRCDLAR TOKAMAK: EXPERIMENT AND THEORY BY B, a tokamak with a four-null poloidal divertor. Experi mental results are clo sely compared with stability indicates #12;AXISYMMETRIC INSTABILITY IN A NONCIRCULAR TOKAMAK: EXPERIMENT AND THEORY by B. Lipschultz

  13. Optical Investigations of Dust Particles Distribution in RF and DC Discharges

    SciTech Connect (OSTI)

    Ramazanov, T. S.; Dosbolayev, M. K.; Jumabekov, A. N.; Amangaliyeva, R. Zh. [Al-Farabi Kazakh National University, IETP, 96a Tole Bi St., Almaty 050012 (Kazakhstan); Filatova, I. I.; Azharonok, V. V. [B. I. Stepanov Institute of Physics NAS of Belarus, Nezavisimosti Ave., 68, 220072, Minsk (Belarus)

    2008-09-07T23:59:59.000Z

    Optical emission spectroscopy is used to study dust particles movement and conditions of a formation of ordered plasma-dust structures in a capacitively coupled RF discharge. 3D binocular diagnostics of plasma-dust structures in dc discharge was made.

  14. An Hybrid-Excited Flux-Switching Machine for High Speed DC-Alternator Applications

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ) with excitation coils located in stator slots (or inner DC windings). After describing the three phase structure is interesting for variable- speed applications. Finally, a prototype having 12 stator poles and different rotor in the stator [17]. Regarding the thermal behavior, we demonstrate in this work the suitability of this topology

  15. Save the Date for ACES 2014! Washington D.C. | December 811, 2014

    E-Print Network [OSTI]

    Watson, Craig A.

    methods and experiences relating to Ecosystem Services. Specific themes to be ad dressed include that ACES: A Community on Ecosystem Services, in partner ship with the Ecosystem Markets Community and the Ecosystem Services Partnership, will host the ACES 2014 Conference in Washington, DC, December 811, 2014

  16. Comparison of Two Autonomous AC-DC Converters for Piezoelectric Energy Scavenging Systems

    E-Print Network [OSTI]

    Boyer, Edmond

    - 1 - Comparison of Two Autonomous AC-DC Converters for Piezoelectric Energy Scavenging Systems E Cornaredo, Milan, Italy Abstract - Piezoelectric Energy Scavenging Systems (PESS) are used to convert of the output voltage of these transducers is needed. Since the output power level of the energy transducer can

  17. Adaptive Nonlinear Control of Induction Motors through AC/DC/AC A. El Fadili*1

    E-Print Network [OSTI]

    Boyer, Edmond

    in a satisfactory way. First, a nonlinear model of the whole controlled system is developed within the Park be tightly regulated; (iii) the power factor correction (PFC) w.r.t. the power supply net must be performed control objectives (motor speed tracking, rotor flux regulation, DC link voltage regulation and unitary

  18. Hydrogen Storage Systems Analysis Working Group Meeting Argonne National Laboratory DC Offices

    E-Print Network [OSTI]

    at Savannah River National Laboratory (Don Anton and Bruce Hardy, SRNL) Based on the operating conditionsHydrogen Storage Systems Analysis Working Group Meeting Argonne National Laboratory DC Offices 955 by Romesh Kumar Argonne National Laboratory and Laura Verduzco Sentech, Inc. February 28, 2007 #12;SUMMARY

  19. Living downtown in Washington, D.C. : defining residential community in the city center

    E-Print Network [OSTI]

    Allen, Robin P. (Robin Porter)

    1995-01-01T23:59:59.000Z

    In Washington D.C., as in many other American cities, a significant section of the downtown is distinguished by boarded-up buildings and vacant lots. In spite of traces of a city plan that could organize and accommodate a ...

  20. First National Conference on Carbon Sequestration Washington, DC, May 14-17, 2001

    E-Print Network [OSTI]

    First National Conference on Carbon Sequestration Washington, DC, May 14-17, 2001 Caldeira, K for Research on Ocean Carbon Sequestration (DOCS) *Climate and Carbon Cycle Modeling Group, Lawrence Livermore carbon sequestration strategy. Therefore, we want to understand the effectiveness of oceanic injection

  1. Corbicula Biomonitoring in the Anacostia Watershed Final Report to the DC Water Resources Research Center

    E-Print Network [OSTI]

    District of Columbia, University of the

    1 Corbicula Biomonitoring in the Anacostia Watershed Final Report to the DC Water Resources and estuary sites for eight weeks and tissues analyzed for 21 pesticides, 28 PCB congenors, 18 PAHs and 6 tPAHs were significently increased. Clams placed just above tide in three of five main tributaries

  2. Conductor Color-Coding In the recent past, most PV arrays have grounded the DC

    E-Print Network [OSTI]

    Johnson, Eric E.

    Conductor Color-Coding In the recent past, most PV arrays have grounded the DC negative conductor would be most clearly understood if it were black. The increasing use of transformerless inverters will dictate the use of ungrounded PV arrays (Section 690.35). Then we can adopt a "red is positive" and "black

  3. INVESTIGATION OF ELECTRIC CONDITIONS IN THE VICINITY OF CARBON NANOTUBES GROWN IN A DC PLASMA SHEATH

    E-Print Network [OSTI]

    Boyer, Edmond

    nanotubes (CNTs ­ long tubular carbon nanostructures) belong to the best electron field emitting materials, such as nanoelectronics devices or mechanical reinforcement in composite materials [2,3]. The field emission propertiesINVESTIGATION OF ELECTRIC CONDITIONS IN THE VICINITY OF CARBON NANOTUBES GROWN IN A DC PLASMA

  4. Copyright 2011 American Chemical Society 1155 Sixteenth Street N.W., Washington, DC 20036

    E-Print Network [OSTI]

    Aksay, Ilhan A.

    Copyright © 2011 American Chemical Society 1155 Sixteenth Street N.W., Washington, DC 20036 For Selected: Application of Highly Ordered TiO2 Nanotube Arrays in Flexible Dye-Sensitized Solar Cells Daibin Light-Emitting Diodes on Solution-Processed Graphene Transparent Electrodes Junbo Wu, Mukul Agrawal, H

  5. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Aristomenis Donos; Jerome P. Gauntlett

    2015-06-04T23:59:59.000Z

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  6. Navier-Stokes on Black Hole Horizons and DC Thermoelectric Conductivity

    E-Print Network [OSTI]

    Donos, Aristomenis

    2015-01-01T23:59:59.000Z

    We consider a general class of black hole solutions of Einstein-Maxwell theory which are holographically dual to CFTs with spatially dependent sources. We show that an averaged DC thermoelectric conductivity matrix can be obtained by solving the forced, linearised, time-independent Navier-Stokes equations on the black hole horizon for an incompressible and charged fluid.

  7. A Comparison of the AC and DC Power Flow Models for LMP Calculations

    E-Print Network [OSTI]

    A Comparison of the AC and DC Power Flow Models for LMP Calculations Thomas J. Overbye, Xu Cheng power flow model for LMP-based market calculations. The paper first provides a general discussion of balanced, three phase, electric power transmission networks is through the solution of the power flow. From

  8. NXT DC Motor Frequency Response Last updated 11/04/12 Copyright Paul Oh

    E-Print Network [OSTI]

    Oh, Paul

    Response Previous labs and lectures investigated a system's step response. One could observe time- domain-domain. Hence concepts on attenuation and phase lag are thus presented. Preamble: Summary of Step Response to any signal. Figure A: Step response of NXT DC motor to a motor command of 75% power Figure B: Simulink

  9. Performance test results for the Eaton dc developmental power train in an electric test bed vehicle

    SciTech Connect (OSTI)

    Crumley, R.L.; Donaldson, M.R.

    1987-09-01T23:59:59.000Z

    This report presents the results of the tests performed on a direct current (dc) power train in a test bed vehicle developed by the Eaton Corporation for the US Department of Energy (DOE). The tests were performed by EG and G Idaho, Inc. at the Idaho National Engineering Laboratory (INEL). The purpose of the INEL testing was to provide test results from which an evaluation of the performance capabilities of the Eaton dc power train could be made and compared with other vehicle propulsion systems. The planned tests were primarily oriented toward road testing, chassis dynamometer testing, and associated dynamometer coastdown tests for road loss determination. Range tests of the Eaton dc test bed vehicle using an ALCO 2200 lead acid battery pack, produced ranges of 97 km at 56 km/h (60 miles at 35 mph), 79 km at 72 km/h (49 miles at 45 mph), and 47 km at 88 km/h (29 miles at 55 mph). The corresponding net dc energy consumptions are 135 Wh/km (217 Wh/mile), 145 Wh/km (233 Wh/mile), and 178 Wh/km (287 Wh/mile). The energy consumption for the D-cycle test was 241 Wh/km (387 Wh/mile). 8 refs., 11 figs., 16 tabs.

  10. Policy Research Working Paper 4844, World Bank, Washington DC, April 2009 Weakly Relative Poverty

    E-Print Network [OSTI]

    Krivobokova, Tatyana

    Policy Research Working Paper 4844, World Bank, Washington DC, April 2009 Weakly Relative Poverty, 20433, USA Abstract: Prevailing measures of relative poverty are unchanged when all incomes grow that relax these assumptions. On calibrating our measures to national poverty lines and survey data, we find

  11. Performance Characterization of IP Network-based Control Methodologies for DC Motor Applications Part I

    E-Print Network [OSTI]

    Chow, Mo-Yuen

    Performance Characterization of IP Network-based Control Methodologies for DC Motor Applications stability, allowing control of real-time applications. I. INTRODUCTION A recent trend in control systems ­ Part I Tyler Richards Mo-Yuen Chow Advanced Diagnosis Automation and Control Lab Advanced Diagnosis

  12. Electrical detection of spin pumping: dc voltage generated by ferromagnetic resonance at ferromagnet/nonmagnet contact

    E-Print Network [OSTI]

    van der Wal, Caspar H.

    Electrical detection of spin pumping: dc voltage generated by ferromagnetic resonance We describe electrical detection of spin pumping in metallic nanostructures. In the spin pumping effect, a precessing ferromagnet attached to a normal metal acts as a pump of spin-polarized current

  13. Teaching Sequence for Two Dimensional Motion R. A. Morse, St. Albans School, Washington, DC

    E-Print Network [OSTI]

    Steinberg, Richard N.

    Teaching Sequence for Two Dimensional Motion R. A. Morse, St. Albans School, Washington, DC robert in understanding. Final teaching sequence 1992- 2000 4. Developed sequence of discussion, simulation use, written questions and class discussions designed to engage students throughout sequence. Results now pretty good

  14. Lubbock Metropolitan Transportation Plan

    E-Print Network [OSTI]

    Lubbock Metropolitan Planning Organization

    2007-09-18T23:59:59.000Z

    for Users (SAFETEA-LU) and its predecessors, the Transportation Equity Act for the 21st Century (TEA-21) and the Intermodal Surface Transportation Efficiency Act (ISTEA) of 1991, specified the transportation systems on which certain federal funds can... in Chapter 5 ? Streets and Highways; Chapter 6 ? Public Transportation; Chapter 7 ? Bicycle and Pedestrian Plan; Chapter 8 ? Lubbock International Airport and Chapter 9 ? Railroads and Trucking. Federally funded transit projects were developed...

  15. Manchester Metropolitan University Sustainability

    E-Print Network [OSTI]

    key technologies such as rainwater harvesting and grey water systems to reduce our water usage & Healthy Buildings Water savings · We've reduced our yearly water consumption by 12.1%. · We've utilised of the most visibly sustainable in Manchester city centre. 2,592,000 Ltr Water Management Biodiversity 39 #12

  16. Metropolitan problems in Texas

    E-Print Network [OSTI]

    Pearson, William Morris

    1965-01-01T23:59:59.000Z

    , the fifty state govern- ments, and 56, 507 local governments other than school districts: 3)043 counties, 17, 997 municipalities, 17, 144 townships, and. 18, 323 special districts. The average number of governmental units per state was 1, 825. However... Counties Municipalities Townships and towns School districts Special districts Total 1 50 17, 997 17, 144 34, 678 18, 323 91, 236 1 50 3)050 17)251 17, 198 50, 454 14, 424 102, 392 1 50 3) 052 16, 807 17)202 67, 355 12, 340 116...

  17. OLED area illumination source

    DOE Patents [OSTI]

    Foust, Donald Franklin (Scotia, NY); Duggal, Anil Raj (Niskayuna, NY); Shiang, Joseph John (Niskayuna, NY); Nealon, William Francis (Gloversville, NY); Bortscheller, Jacob Charles (Clifton Park, NY)

    2008-03-25T23:59:59.000Z

    The present invention relates to an area illumination light source comprising a plurality of individual OLED panels. The individual OLED panels are configured in a physically modular fashion. Each OLED panel comprising a plurality of OLED devices. Each OLED panel comprises a first electrode and a second electrode such that the power being supplied to each individual OLED panel may be varied independently. A power supply unit capable of delivering varying levels of voltage simultaneously to the first and second electrodes of each of the individual OLED panels is also provided. The area illumination light source also comprises a mount within which the OLED panels are arrayed.

  18. Inner Area Principles

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn Other News linkThermalInner Area Principles The Inner Area

  19. PROTECTED AREAS AMENDMENTS AND.

    E-Print Network [OSTI]

    as critical fish and wildlife habitat. The "protected areas" amendment is a major step in the Council's efforts to rebuild fish and wildlife populations that have been damaged by hydroelectric development. Low also imposed significant costs. The Northwest's fish and wildlife have suffered extensive losses

  20. MSL ENTERANCE REFERENCE AREA

    E-Print Network [OSTI]

    Aalberts, Daniel P.

    MSL ENTERANCE LOBBY ELEV STAIRS SSL-019 REFERENCE AREA SSL-021 GROUP STUDY SSL-018 STUDY ROOM SSL-029 SSL-020 COPY ROOM SSL-022 GROUP STUDY SSL-026 STACKS SSL-023 GROUP STUDY SSL-024 GROUP STUDY SSL TBL-014 TBL-014A STAIRS SSL-007 GIS/ WORKROOM SSL-011 SSL-008 SSL-009 SSL-010 SSL-014 SSL-017 STAIRS

  1. Subsurface contaminants focus area

    SciTech Connect (OSTI)

    NONE

    1996-08-01T23:59:59.000Z

    The US Department of Enregy (DOE) Subsurface Contaminants Focus Area is developing technologies to address environmental problems associated with hazardous and radioactive contaminants in soil and groundwater that exist throughout the DOE complex, including radionuclides, heavy metals; and dense non-aqueous phase liquids (DNAPLs). More than 5,700 known DOE groundwater plumes have contaminated over 600 billion gallons of water and 200 million cubic meters of soil. Migration of these plumes threatens local and regional water sources, and in some cases has already adversely impacted off-site rsources. In addition, the Subsurface Contaminants Focus Area is responsible for supplying technologies for the remediation of numerous landfills at DOE facilities. These landfills are estimated to contain over 3 million cubic meters of radioactive and hazardous buried Technology developed within this specialty area will provide efective methods to contain contaminant plumes and new or alternative technologies for development of in situ technologies to minimize waste disposal costs and potential worker exposure by treating plumes in place. While addressing contaminant plumes emanating from DOE landfills, the Subsurface Contaminants Focus Area is also working to develop new or alternative technologies for the in situ stabilization, and nonintrusive characterization of these disposal sites.

  2. Plutonium focus area

    SciTech Connect (OSTI)

    NONE

    1996-08-01T23:59:59.000Z

    To ensure research and development programs focus on the most pressing environmental restoration and waste management problems at the U.S. Department of Energy (DOE), the Assistant Secretary for the Office of Environmental Management (EM) established a working group in August 1993 to implement a new approach to research and technology development. As part of this new approach, EM developed a management structure and principles that led to the creation of specific Focus Areas. These organizations were designed to focus the scientific and technical talent throughout DOE and the national scientific community on the major environmental restoration and waste management problems facing DOE. The Focus Area approach provides the framework for intersite cooperation and leveraging of resources on common problems. After the original establishment of five major Focus Areas within the Office of Technology Development (EM-50, now called the Office of Science and Technology), the Nuclear Materials Stabilization Task Group (EM-66) followed the structure already in place in EM-50 and chartered the Plutonium Focus Area (PFA). The following information outlines the scope and mission of the EM, EM-60, and EM-66 organizations as related to the PFA organizational structure.

  3. DOE Designates Southwest Area and Mid-Atlantic Area National...

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

    Interest Electric Transmission Corridors DOE Designates Southwest Area and Mid-Atlantic Area National Interest Electric Transmission Corridors October 2, 2007 - 11:12am Addthis...

  4. Impact of quasi-dc currents on three-phase distribution transformer installations. Power Systems Technology Program

    SciTech Connect (OSTI)

    McConnell, B.W.; Barnes, P.R. [Oak Ridge National Lab., TN (United States); Tesche, F.M. [Tesche (F.M.), Dallas, TX (United States); Schafer, D.A. [Mission Research Corp., Albuquerque, NM (United States)

    1992-06-01T23:59:59.000Z

    This report summarizes a series of tests designed to determine the response of quasi-dc currents on three-phase power distribution transformers for electric power systems. In general, if the dc injection is limited to the primary side of a step-down transformer, significant harmonic distortion is noted and an increase in the reactive power demand results. For dc injection on the secondary (load) side of the step-down transformer the harmonic content at the secondary side is quite high and saturation occurs with a relatively low level of dc injection; however, the reactive power demand is significantly lower. These tests produced no apparent damage to the transformers. Transformer damage is dependent on the duration of the dc excitation, the level of the excitation, and on thermal characteristics of the transfer. The transformer response time is found to be much shorter than seen in power transformer tests at lower dc injection levels. This shorter response time suggests that the response time is strongly dependent on the injected current levels, and that higher levels of dc injection for shorter durations could produce very high reactive power demands and harmonic distortion within a few tenths of a second. The added reactive power load could result in the blowing of fuses on the primary side of the transformer for even moderate dc injection levels, and neutral currents are quite large under even low-level dc injection. This ``smoking neutral`` results in high-level harmonic injection into equipment via the neutral and in possible equipment failure.

  5. Scientific and Natural Areas (Minnesota)

    Broader source: Energy.gov [DOE]

    Certain scientific and natural areas are established throughout the state for the purpose of preservation and protection. Construction and new development is prohibited in these areas.

  6. DC-like Phase Space Manipulation and Particle Acceleration Using Chirped AC Fields

    SciTech Connect (OSTI)

    P.F. Schmit and N.J. Fisch

    2009-06-17T23:59:59.000Z

    Waves in plasmas can accelerate particles that are resonant with the wave. A DC electric field also accelerates particles, but without a resonance discrimination, which makes the acceleration mechanism profoundly different. We investigate the effect on a Hamiltonian distribution of an accelerating potential waveform, which could, for example, represent the average ponderomotive effect of two counterpropagating electromagnetic waves. In particular, we examine the apparent DC-like time-asymptotic response of the distribution in regimes where the potential structure is accelerated adiabatically. A highly resonant population within the distribution is always present, and we characterize its nonadiabatic response during wave-particle resonance using an integral method in the noninertial reference frame moving with the wave. Finally, we show that in the limit of infinitely slow acceleration of the wave, these highly resonant particles disappear and the response

  7. Effect of alkali addition on DC conductivity and thermal properties of vanadium-bismo-borate glasses

    SciTech Connect (OSTI)

    Khasa, S., E-mail: skhasa@rediff.com; Dahiya, M. S., E-mail: skhasa@rediff.com [Physics Department, Deenbandhu Chhotu Ram University of Science and Technology, Murthal-131039 (India); Agarwal, A. [Physics Department, Guru Jambheshwara University of Science and Technology, Hisar-125001 (India)

    2014-04-24T23:59:59.000Z

    The DC Conductivity and Differential Thermal Analysis of glasses with composition (30?x)Li{sub 2}O?xV{sub 2}O{sub 5}?20Bi{sub 2}O{sub 3}?50B{sub 2}O{sub 3}(x=15, 10, 5) has been carried out in order to study the effect of replacing the Transition Metal Oxide (TMO) with alkali oxide. A significant increase in the DC conductivity has been observed with increase in alkali content. Again the thermal measurements have shown the decrease in both glass transition temperature (T{sub g}) and crystallization temperature (T{sub x}). The Glass Stability (GS) and Glass Forming Ability (GFA) have also been calculated and these also were found to decrease with increase in alkali oxide content at the cost of TMO.

  8. Parallel 3D Finite Element Numerical Modelling of DC Electron Guns

    SciTech Connect (OSTI)

    Prudencio, E.; Candel, A.; Ge, L.; Kabel, A.; Ko, K.; Lee, L.; Li, Z.; Ng, C.; Schussman, G.; /SLAC

    2008-02-04T23:59:59.000Z

    In this paper we present Gun3P, a parallel 3D finite element application that the Advanced Computations Department at the Stanford Linear Accelerator Center is developing for the analysis of beam formation in DC guns and beam transport in klystrons. Gun3P is targeted specially to complex geometries that cannot be described by 2D models and cannot be easily handled by finite difference discretizations. Its parallel capability allows simulations with more accuracy and less processing time than packages currently available. We present simulation results for the L-band Sheet Beam Klystron DC gun, in which case Gun3P is able to reduce simulation time from days to some hours.

  9. Demonstration of Cathode Emittance Dominated High Bunch Charge Beams in a DC gun-based Photoinjector

    E-Print Network [OSTI]

    Gulliford, Colwyn; Bazarov, Ivan; Dunham, Bruce; Cultrera, Luca

    2015-01-01T23:59:59.000Z

    We present the results of transverse emittance and longitudinal current profile measurements of high bunch charge (greater than or equal to 100 pC) beams produced in the DC gun-based Cornell Energy Recovery Linac Photoinjector. In particular, we show that the cathode thermal and core beam emittances dominate the final 95% and core emittance measured at 9-9.5 MeV. Additionally, we demonstrate excellent agreement between optimized 3D space charge simulations and measurement, and show that the quality of the transverse laser distribution limits the optimal simulated and measured emittances. These results, previously thought achievable only with RF guns, demonstrate that DC gun based photoinjectors are capable of delivering beams with sufficient single bunch charge and beam quality suitable for many current and next generation accelerator projects such as Energy Recovery Linacs (ERLs) and Free Electron Lasers (FELs).

  10. Efficiency consideration of DC link soft-switching inverters for motor drive applications

    SciTech Connect (OSTI)

    Lai, J.S.; Young, R.W.; McKeever, J.W.

    1994-12-31T23:59:59.000Z

    This paper critically evaluates efficiency of soft switching inverters including an actively clamped resonant dc link inverter and a clamped-mode resonant pole inverter. An analytical approach to evaluating efficiency of the clamped-mode soft switching inverter has been developed. The evaluation results are compared with that of the standard pulse-width-modulation (PWM) inverter. A 50-kW induction motor is used as the variable load, and the inverter efficiency is evaluated under different speed and torque conditions. The clamped-mode soft-switching inverter, although eliminating the switching loss, shows poor efficiency over the entire load range. Under low load conditions, the efficiency profile is even worse. The actively clamped resonant dc link inverter shows highest efficiency over the entire speed and torque range. However, its energy saving over the standard PWM inverter is marginal under full load or high speed conditions.

  11. Time series analysis of ionization waves in dc neon glow discharge

    SciTech Connect (OSTI)

    Hassouba, M. A.; Al-Naggar, H. I.; Al-Naggar, N. M.; Wilke, C. [Department of Physics, Faculty of Science, Benha University (Egypt); Institute of Physics, E. M. A. University, Domstrasse 10a, 17489 Greifswald (Germany)

    2006-07-15T23:59:59.000Z

    The dynamics of dc neon glow discharge is examined by calculating a Lyapunov exponent spectrum (LES) and correlation dimension (D{sub corr}) from experimental time series. The embedding theory is used to reconstruct an attractor with the delay coordinate method. The analysis refers to periodic, chaotic, and quasi-periodic attractors. The results obtained are confirmed by a comparison with other methods of time series analysis such as the Fourier power spectrum and autocorrelation function. The main object of the present work is the positive column of a dc neon glow discharge. The positive column is an excellent model for the study of a non-linearity plasma system because it is nonisothermal plasma far from equilibrium.

  12. Method of measuring the dc electric field and other tokamak parameters

    DOE Patents [OSTI]

    Fisch, Nathaniel J. (Princeton, NJ); Kirtz, Arnold H. (Princeton Junction, NJ)

    1992-01-01T23:59:59.000Z

    A method including externally imposing an impulsive momentum-space flux to perturb hot tokamak electrons thereby producing a transient synchrotron radiation signal, in frequency-time space, and the inference, using very fast algorithms, of plasma parameters including the effective ion charge state Z.sub.eff, the direction of the magnetic field, and the position and width in velocity space of the impulsive momentum-space flux, and, in particular, the dc toroidal electric field.

  13. VUV generation by adiabatically expanded and excited by a DC electrical discharge Argon gas

    SciTech Connect (OSTI)

    Pipergias, K.; Yasemidis, D.; Reppa, E.; Pentaris, D.; Efthimiopoulos, T. [Laser, Non linear and Quantum Optics Labs, Physics Department University of Patras, Patras, Greece 26500 (Greece); Merlemis, N. [Laser, Non linear and Quantum Optics Labs, Physics Department University of Patras, Patras, Greece 26500 (Greece); TEI of Athens, Phys. Chem. and Mater. Tech. Department, Athens, Greece, 12 210 (Greece); Giannetas, V. [Physics Department, University of Patras, Patras, Greece 26500 (Greece)

    2010-11-10T23:59:59.000Z

    We investigate the emission of Argon (Ar) gas which is adiabatically expanded through a nozzle and excited using a DC electrical discharge. Because of the expansion and the electronic excitation, Ar dimers and clusters are formed, which give radiation in the second (2nd) and in the third (3rd) continua of Ar, centered at about 126 and 254 nm respectively. We particularly focus our study on the 2nd continuum, in order to develop a laser at this wavelength.

  14. Characterization of terahertz emission from a dc-biased filament in air

    SciTech Connect (OSTI)

    Chen Yanping; Wang Tiejun; Marceau, Claude; Chin, See Leang [Centre d'Optique, Photonique et Laser (COPL), and Departement de Physique, de genie physique et d'optique, Universite Laval, Quebec, Quebec G1V 0A6 (Canada); Theberge, Francis; Chateauneuf, Marc; Dubois, Jacques [Defence Research and Development Canada-Valcartier, 2459 Pie-XI Blvd. North, Quebec, Quebec G3J 1X5 (Canada); Kosareva, Olga [International Laser Center, Physics Department, M.V. Lomonosov Moscow State University, Moscow 119992 (Russian Federation)

    2009-09-07T23:59:59.000Z

    We demonstrate that the terahertz emission from a dc-biased filament can be regarded as a sum of an elliptically polarized terahertz source (generated by a filament without external electric field) and a linearly polarized terahertz source induced by the external electric field applied to the filament. The peak frequency and linewidth of the linearly polarized terahertz source are related to the average plasma density of the filament.

  15. Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front

    DOE Patents [OSTI]

    Dawson, J.M.; Mori, W.B.; Lai, C.H.; Katsouleas, T.C.

    1998-07-14T23:59:59.000Z

    Method and apparatus ar disclosed for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing. 4 figs.

  16. Method and apparatus for generating radiation utilizing DC to AC conversion with a conductive front

    DOE Patents [OSTI]

    Dawson, John M. (Pacific Palisades, CA); Mori, Warren B. (Hermosa Beach, CA); Lai, Chih-Hsiang (So. Pasadena, CA); Katsouleas, Thomas C. (Malibu, CA)

    1998-01-01T23:59:59.000Z

    Method and apparatus for generating radiation of high power, variable duration and broad tunability over several orders of magnitude from a laser-ionized gas-filled capacitor array. The method and apparatus convert a DC electric field pattern into a coherent electromagnetic wave train when a relativistic ionization front passes between the capacitor plates. The frequency and duration of the radiation is controlled by the gas pressure and capacitor spacing.

  17. Round-robin artificial contamination test on high voltage dc insulators

    SciTech Connect (OSTI)

    Naito, K.; Schneider, H.M.

    1995-07-01T23:59:59.000Z

    This paper summarizes the results of a worldwide round-robin test of high voltage dc (HVDC) insulators, which was carried out in six laboratories aiming at standardization of the method for artificial contamination tests on HVDC insulators. Flashover characteristics of three kinds of specimens were evaluated by the clean fog and the salt fog procedures. Sufficient information is now available to allow the preparation of provisional international specifications for artificial contamination testing of HVDC insulators.

  18. Hardware model of a shipboard zonal electrical distribution system (ZEDS) : alternating current/direct current (AC/DC)

    E-Print Network [OSTI]

    Tidd, Chad N. (Chad Norman)

    2010-01-01T23:59:59.000Z

    A hardware model of a shipboard electrical distribution system based on aspects of the DDG 51 Flight IIA, Arleigh Burke class, 60Hz Alternating Current (AC) and the future direct current (DC), zonal electrical distribution ...

  19. The design of a hybrid DC motor/SMA actuated robotic hand based on physiological and anatomical synergies

    E-Print Network [OSTI]

    Rosmarin, Josiah Benjamin

    2008-01-01T23:59:59.000Z

    A new approach to the design and control of multi-fingered hands using hybrid DC motor-Shape Memory Alloy (SMA) array actuators is presented in this thesis. The fundamental design concept is based on the principle of motor ...

  20. A High Frequency Isolated Current-fed Bidirectional DC/AC Converter For Grid-Tied Energy Storage System

    E-Print Network [OSTI]

    King Jet, TSENG

    2013-01-01T23:59:59.000Z

    tied energy storage systems (ESS) will be voltage to a high-DC/AC converter to interface ESS based on low voltage cellscharging and discharging of the ESS and the control strategy

  1. Impact of Input Voltage Sag and Unbalance on DC Link Inductor and Capacitor Stress in Adjustable Speed Drives

    E-Print Network [OSTI]

    Lipo, Thomas

    , outages, voltage surges and sags. Power quality problems induced in adjustable-speed drives (ASDs) have (120 Hz for 60 Hz system) that increases the electrical stresses on the dc bus choke inductor (if used

  2. Residential Energy Efficiency Research Planning Meeting Summary Report: Washington, D.C. - October 27-28, 2011

    SciTech Connect (OSTI)

    Not Available

    2012-02-01T23:59:59.000Z

    This report summarizes key findings and outcomes from the U.S. Department of Energy's Building America Residential Energy Efficiency Research Planning meeting, held on October 28-29, 2011, in Washington, D.C.

  3. Design and performance evaluation of an electric go-kart and custom permanent magnet brushless DC motor

    E-Print Network [OSTI]

    Davis, Eli Marc

    2012-01-01T23:59:59.000Z

    This undergraduate thesis documents the design considerations and specifications of building a personal battery-powered go-kart. This includes designing and building a custom brushless DC motor for use in the drivetrain. ...

  4. A Generalized Class of Stationary Frame-Current Controllers for Grid-Connected AC–DC Converters

    E-Print Network [OSTI]

    Hwang, J. George

    Within power systems, high-power pulsewidth-modulated ac-dc converters are used in flexible ac transmission systems controllers and for interfacing renewable energy sources to the grid. These converters traditionally ...

  5. 232 IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 17, NO. 2, MARCH 2002 Current Control Strategy for Brushless DC Motors

    E-Print Network [OSTI]

    Catholic University of Chile (Universidad CatĂłlica de Chile)

    synchronous motor (PMSM), which is fed with sinusoidal currents 2) brushless dc motor (BDCM), which is fed, the power-to-weight ratio of PMSM and BDCM is higher than equivalent squirrel cage induction machines

  6. Large area bulk superconductors

    DOE Patents [OSTI]

    Miller, Dean J. (Darien, IL); Field, Michael B. (Jersey City, NJ)

    2002-01-01T23:59:59.000Z

    A bulk superconductor having a thickness of not less than about 100 microns is carried by a polycrystalline textured substrate having misorientation angles at the surface thereof not greater than about 15.degree.; the bulk superconductor may have a thickness of not less than about 100 microns and a surface area of not less than about 50 cm.sup.2. The textured substrate may have a thickness not less than about 10 microns and misorientation angles at the surface thereof not greater than about 15.degree.. Also disclosed is a process of manufacturing the bulk superconductor and the polycrystalline biaxially textured substrate material.

  7. Strategic Focus Areas

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del Sol HomeFacebookScholarshipSpiralingSecurity217,354Strategic Focus Areas Lockheed

  8. Possibilities for Measurement and Compensation of Stray DC Electric Fields Acting on Drag-Free Test Masses

    E-Print Network [OSTI]

    W. J. Weber; L. Carbone; A. Cavalleri; R. Dolesi; C. D. Hoyle; M. Hueller; S. Vitale

    2003-09-13T23:59:59.000Z

    DC electric fields can combine with test mass charging and thermal dielectric voltage noise to create significant force noise acting on the drag-free test masses in the LISA (Laser Interferometer Space Antenna) gravitational wave mission. This paper proposes a simple technique to measure and compensate average stray DC potentials at the mV level, yielding substantial reduction in this source of force noise. We discuss the attainable resolution for both flight and ground based experiments.

  9. San Francisco Bay Area’s Spare the Air/Free Morning Commute Program: Program Effectiveness in Comparison to the Washington, D.C. and Los Angeles Area Strategy and Suggestions for Enhancing Ridership D.

    E-Print Network [OSTI]

    Joshua Widmann

    2006-01-01T23:59:59.000Z

    Rosa CityBus Sonoma County Transit Tri Delta Transi t UnionSantaRosa CityBus Sonoma County Transit Tri Delta Transi t

  10. T-1 Training Area

    SciTech Connect (OSTI)

    None

    2014-11-07T23:59:59.000Z

    Another valuable homeland security asset at the NNSS is the T-1 training area, which covers more than 10 acres and includes more than 20 separate training venues. Local, County, and State first responders who train here encounter a variety of realistic disaster scenarios. A crashed 737 airliner lying in pieces across the desert, a helicopter and other small aircraft, trucks, buses, and derailed train cars are all part of the mock incident scene. After formal classroom education, first responders are trained to take immediate decisive action to prevent or mitigate the use of radiological or nuclear devices by terrorists. The Counterterrorism Operations Support Center for Radiological Nuclear Training conducts the courses and exercises providing first responders from across the nation with the tools they need to protect their communities. All of these elements provide a training experience that cannot be duplicated anywhere else in the country.

  11. T-1 Training Area

    ScienceCinema (OSTI)

    None

    2015-01-09T23:59:59.000Z

    Another valuable homeland security asset at the NNSS is the T-1 training area, which covers more than 10 acres and includes more than 20 separate training venues. Local, County, and State first responders who train here encounter a variety of realistic disaster scenarios. A crashed 737 airliner lying in pieces across the desert, a helicopter and other small aircraft, trucks, buses, and derailed train cars are all part of the mock incident scene. After formal classroom education, first responders are trained to take immediate decisive action to prevent or mitigate the use of radiological or nuclear devices by terrorists. The Counterterrorism Operations Support Center for Radiological Nuclear Training conducts the courses and exercises providing first responders from across the nation with the tools they need to protect their communities. All of these elements provide a training experience that cannot be duplicated anywhere else in the country.

  12. Functional Area Assessments Project Charter Workstream Name Functional Area Assessments

    E-Print Network [OSTI]

    Sheridan, Jennifer

    with Huron on detailed project plan. Subject Experts Subject Expert Role Functional leadership Administrative1 of 2 Functional Area Assessments ­ Project Charter Workstream Name Functional Area Assessments - Internal Budgeting - Human Resources These diagnostics will be performed using interviews, surveys, data

  13. Surface Water Management Areas (Virginia)

    Broader source: Energy.gov [DOE]

    This legislation establishes surface water management areas, geographically defined surface water areas in which the State Water Control Board has deemed the levels or supply of surface water to be...

  14. Boundary Waters Canoe Area (Minnesota)

    Broader source: Energy.gov [DOE]

    The Boundary Waters Canoe Area occupies a large section of northern Minnesota, and is preserved as a primitive wilderness area. Construction and new development is prohibited. A map of the...

  15. WASHINGTON. DC.

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3uj:'I,\ W C -h J Ircc.p,anc.

  16. Washington, DC'

    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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA group currentBradleyTableSelling7 AugustAFRICAN3uj:'I,\ W C -h JWJLP-~ . '-WQl.

  17. Communication in Home Area Networks

    E-Print Network [OSTI]

    Wang, Yubo

    2012-01-01T23:59:59.000Z

    used in area like smart buildings, street light controls andbuilding. This section focuses on HAN design to address two smart

  18. EARLY PHASE OBSERVATIONS OF EXTREMELY LUMINOUS TYPE Ia SUPERNOVA 2009dc

    SciTech Connect (OSTI)

    Yamanaka, M.; Arai, A.; Chiyonobu, S.; Fukazawa, Y.; Ikejiri, Y.; Itoh, R.; Komatsu, T.; Miyamoto, H. [Department of Physical Science, Hiroshima University, Kagamiyama 1-3-1, Higashi-Hiroshima 739-8526 (Japan); Kawabata, K. S. [Hiroshima Astrophysical Science Center, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan); Kinugasa, K.; Hashimoto, O.; Honda, S. [Gunma Astronomical Observatory, Takayama, Gunma 377-0702 (Japan); Tanaka, M. [Department of Astronomy, School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan); Imada, A.; Kuroda, D. [Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Kamogata, Asakuchi-shi, Okayama 719-0232 (Japan); Maeda, K.; Nomoto, K. [Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa (Japan); Kamata, Y. [National Astronomical Observatory of Japan, Osawa, Mitaka, Tokyo 181-8588 (Japan); Kawai, N. [Department of Physics, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551 (Japan); Konishi, K., E-mail: myamanaka@hiroshima-u.ac.j [Institute for Cosmic Ray Research, University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa, Chiba, 277-8582 (Japan)

    2009-12-20T23:59:59.000Z

    We present early phase observations in optical and near-infrared wavelengths for the extremely luminous Type Ia supernova (SN Ia) 2009dc. The decline rate of the light curve is DELTAm{sub 15}(B) = 0.65 +- 0.03, which is one of the slowest among SNe Ia. The peak V-band absolute magnitude is estimated to be M{sub V} = -19.90 +- 0.15 mag if no host extinction is assumed. It reaches M{sub V} = -20.19 +- 0.19 mag if we assume the host extinction of A{sub V} = 0.29 mag. SN 2009dc belongs to the most luminous class of SNe Ia, like SNe 2003fg and 2006gz. Our JHK{sub s} -band photometry shows that this SN is also one of the most luminous SNe Ia in near-infrared wavelengths. We estimate the ejected {sup 56}Ni mass of 1.2 +- 0.3 M{sub sun} for the no host extinction case (and of 1.6 +- 0.4 M{sub sun} for the host extinction of A{sub V} = 0.29 mag). The C II lambda6580 absorption line remains visible until a week after the maximum brightness, in contrast to its early disappearance in SN 2006gz. The line velocity of Si II lambda6355 is about 8000 km s{sup -1} around the maximum, being considerably slower than that of SN 2006gz. The velocity of the C II line is similar to or slightly less than that of the Si II line around the maximum. The presence of the carbon line suggests that the thick unburned C+O layer remains after the explosion. Spectropolarimetric observations by Tanaka et al. indicate that the explosion is nearly spherical. These observational facts suggest that SN 2009dc is a super-Chandrasekhar mass SN Ia.

  19. Pulsed DC magnetron sputtered piezoelectric thin film aluminum nitride – Technology and piezoelectric properties

    SciTech Connect (OSTI)

    Stoeckel, C., E-mail: chris.stoeckel@zfm.tu-chemnitz.de; Kaufmann, C.; Hahn, R.; Schulze, R. [Center for Microtechnologies, Chemnitz University of Technology, Chemnitz 09126 (Germany); Billep, D. [Fraunhofer Institute for Electronic Nano Systems (ENAS), Chemnitz 09126 (Germany); Gessner, T. [Center for Microtechnologies, Chemnitz University of Technology, Chemnitz 09126 (Germany); Fraunhofer Institute for Electronic Nano Systems (ENAS), Chemnitz 09126 (Germany)

    2014-07-21T23:59:59.000Z

    Pulsed DC magnetron sputtered aluminum nitride (AlN) thin films are prepared on several seed layers and at different sputtering conditions. The piezoelectric c-axis (002) orientation of the AlN is analyzed with X-ray diffraction method. The transverse piezoelectric coefficient d{sub 31} is determined with a Laser-Doppler-Vibrometer at cantilevers and membranes by analytical calculations and finite element method. Additionally, thin film AlN on bulk silicon is used to characterize the longitudinal piezoelectric charge coefficient d{sub 33}.

  20. DC superconducting quantum interference device usable in nuclear quadrupole resonance and zero field nuclear magnetic spectrometers

    DOE Patents [OSTI]

    Fan, N.Q.; Clarke, J.

    1993-10-19T23:59:59.000Z

    A spectrometer for measuring the nuclear quadrupole resonance spectra or the zero-field nuclear magnetic resonance spectra generated by a sample is disclosed. The spectrometer uses an amplifier having a dc SQUID operating in a flux-locked loop for generating an amplified output as a function of the intensity of the signal generated by the sample. The flux-locked loop circuit includes an integrator. The amplifier also includes means for preventing the integrator from being driven into saturation. As a result, the time for the flux-locked loop to recover from the excitation pulses generated by the spectrometer is reduced. 7 figures.