National Library of Energy BETA

Sample records for road athens ga

  1. Epidemiologic characteristics of pityriasis rosea in Athens Greece

    E-Print Network [OSTI]

    Kyriakis, Kyriakos P; Palamaras, Ioulios; Terzoudi, Sofia; Pagana, Georgia; Emmanuelides, Smaro; Michailides, Charalambos

    2006-01-01

    of pityriasis rosea in Athens Greece Kyriakos P. Kyriakis,St. Barbara" Athens, Greece. fountou@spark.net.gr Pityriasis

  2. NATIONAL TECHNICAL UNIVERSITY OF ATHENS SCHOOL OF CIVIL ENGINEERING

    E-Print Network [OSTI]

    Psarrakos, Panayiotis

    NATIONAL TECHNICAL UNIVERSITY OF ATHENS SCHOOL OF CIVIL ENGINEERING LABORATORY://nanolab.chemeng.ntua.gr/) #12; NATIONAL TECHNICAL UNIVERSITY OF ATHENS SCHOOL OF CIVIL ENGINEERING LABORATORY; NATIONAL TECHNICAL UNIVERSITY OF ATHENS SCHOOL OF CIVIL ENGINEERING LABORATORY FOR EARTHQUAKE

  3. ELLESMERE ROAD ELLESMERE ROAD

    E-Print Network [OSTI]

    Boonstra, Rudy

    ELLESMERE ROAD ELLESMERE ROAD M ILITARY TRAIL PARKING PARKING PARKING PARKING PARKING CC SL AA SW SW - Science Wing AccessAbility Services Police & Parking Service Leigha Lee Browne Theatre SRC

  4. Athens 1833-1979 : the dynamics of urban growth

    E-Print Network [OSTI]

    Loukopoulos, Dimitris

    1980-01-01

    His thesis deals with the urban development of the city of Athens since its foundation as the capital of the newborn Greek State (1833) , until our days. The study focuses on two particular characteristics that dominate ...

  5. Drosscape and the city : the case of Eleonas in Athens

    E-Print Network [OSTI]

    Samartzopoulos, Georgios

    2014-01-01

    This thesis addresses design strategies for the future development of drosscapes in urban regions and their relation with the city at large, having as an example the district of Eleonas in Athens, Greece. It provides answers ...

  6. Constructionism 2012, Athens, Greece ISBN: 978-960-88298-4-8 RESEARCH REPORT 370

    E-Print Network [OSTI]

    Wilensky, Uri

    Constructionism 2012, Athens, Greece ISBN: 978-960-88298-4-8 RESEARCH REPORT 370 Representational essentially tying the constructed knowledge structures to the game #12;Constructionism 2012, Athens, Greece

  7. Distributed road assessment system

    DOE Patents [OSTI]

    Beer, N. Reginald; Paglieroni, David W

    2014-03-25

    A system that detects damage on or below the surface of a paved structure or pavement is provided. A distributed road assessment system includes road assessment pods and a road assessment server. Each road assessment pod includes a ground-penetrating radar antenna array and a detection system that detects road damage from the return signals as the vehicle on which the pod is mounted travels down a road. Each road assessment pod transmits to the road assessment server occurrence information describing each occurrence of road damage that is newly detected on a current scan of a road. The road assessment server maintains a road damage database of occurrence information describing the previously detected occurrences of road damage. After the road assessment server receives occurrence information for newly detected occurrences of road damage for a portion of a road, the road assessment server determines which newly detected occurrences correspond to which previously detected occurrences of road damage.

  8. City of Athens, Alabama (Utility Company) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLCLtd JumpGeorgia (Utility Company)Arlington, SouthAthens, Alabama

  9. Athens County, Ohio: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: EnergyYork Jump|Line SitingOil andAshtabulaIowa) Jump to:Athens

  10. Joshua Smith Spring 2006

    E-Print Network [OSTI]

    Radcliffe, David

    Road, Room 101 Athens, GA 30602-1510 (706) 583-0373 · Fax (706) 583-0612 jroskie@uga.edu This report Manager UGA River Basin Center 110 Riverbend Road, Room 101 Athens, GA 30602-1510 (706) 542-9745 · Fax..........................................................................................8 B. City of Griffin

  11. Just Road Pricing

    E-Print Network [OSTI]

    Schweitzer, Lisa; Taylor, Brian D.

    2010-01-01

    Tolls and taxes can both pay to build a road. But congestionUS, road systems are financed primarily through fuel taxes,fairer than a sales tax. For a given road, how much would

  12. Scott Stadium Stadium Road

    E-Print Network [OSTI]

    Acton, Scott

    Scott Stadium Stadium Road Residence Hereford College Alderman Road Residence Area Aquatic illm ontSt Barracks Road Shopping Center £¤29 £¤298 £¤298 UV654 McCormick Road Residence Area Sustained Mobility Workshop Documentation - Bus Transit Prepared for: Prepared by: Legend n£ Kerchof Hall

  13. Popular urban settlements in Athens : a comparative study of low income housing

    E-Print Network [OSTI]

    Kitsiou, Triada

    1981-01-01

    This study is concerned with aspects of housing and urban development related to the lower income groups in the context of urbanization in Athens, Greece. It identifies and evaluates typical low income housing settlements ...

  14. Li (Lily) Wang Address: 223 Statistics Building, University of Georgia, Athens, GA 30602-7952

    E-Print Network [OSTI]

    Wang, Lily

    ). A nonparametric analysis on the environmental Kuznets curve. Environmetrics, 22(3), 420­430. [9] Liu, X., Wang, L

  15. The new Athens Center applied to Space Weather Forecasting

    SciTech Connect (OSTI)

    Mavromichalaki, H.; Sarlanis, C.; Souvatzoglou, G.; Mariatos, G.; Gerontidou, M.; Plainaki, C.; Papaioannou, A.; Tatsis, S. [University of Athens, Physics Department, Section of Nuclear and Particle Physics, Zografos 15771 Athens (Greece); Belov, A.; Eroshenko, E.; Yanke, V. [IZMIRAN, Russian Academy of Science, 1420092 Moscow (Russian Federation)

    2006-08-25

    The Sun provides most of the initial energy driving space weather and modulates the energy input from sources outside the solar system, but this energy undergoes many transformations within the various components of the solar-terrestrial system, which is comprised of the solar wind, magnetosphere and radiation belts, the ionosphere, and the upper and lower atmospheres of Earth. This is the reason why an Earth's based neutron monitor network can be used in order to produce a real time forecasting of space weather phenomena.Since 2004 a fully functioned new data analysis Center in real-time is in operation in Neutron Monitor Station of Athens University (ANMODAP Center) suitable for research applications. It provides a multi sided use of twenty three neutron monitor stations distributing in all world and operating in real-time given crucial information on space weather phenomena. In particular, the ANMODAP Center can give a preliminary alert of ground level enhancements (GLEs) of solar cosmic rays which can be registered around 20 to 30 minutes before the main part of lower energy particles. Therefore these energetic solar cosmic rays provide the advantage of forth warning. Moreover, the monitoring of the precursors of cosmic rays gives a forehand estimate on that kind of events should be expected (geomagnetic storms and/or Forbush decreases)

  16. Road Design Susan Handy

    E-Print Network [OSTI]

    Handy, Susan L.

    Road Design Susan Handy TTP Orientation Seminar October 2014 #12;Lots of Pavement! #12;Level metro areas Planning Local Planning Public Works Local streets Planning Building Operating Road Design · What are the two main purposes of streets/roads/highways? · What's the main difference between streets

  17. Hampton Roads Chart 12245

    E-Print Network [OSTI]

    Hampton Roads Chart 12245 BookletChart Commemorative Edition ­ June, 2012 A reduced scale NOAA ­ East Coast VIRGINIA HAMPTON ROADS The chart on the cover is Coast Chart No. 31, Chesapeake Bay­York River, Hampton Roads, Chesapeake Entrance, published in 1863 by the U.S. Coast and Geo- detic Survey

  18. FaradayRoad National College

    E-Print Network [OSTI]

    Aickelin, Uwe

    FaradayRoad Southwell Hall Newark Hall National College for Teaching and Leadership Melton Hall Wollaton Road A609 Ilkeston Road A609 To University Park Campus (0.5 miles) To city centre Pedestrian/cycle route to campus To city centre To University Park Campus (0.5 mile) TriumphRoad FaradayRoad Derby Road A

  19. The Athens System for Novel Information Discovery N. Vats D.B. Skillicorn

    E-Print Network [OSTI]

    Graham, Nick

    The Athens System for Novel Information Discovery N. Vats D.B. Skillicorn School of Computing Queen-489 Department of Computing and Information Science Queen's University Kingston, Ontario, Canada K7L 3N6 Document information, that is information whose existence is not suspected or for which suitable descriptors

  20. SYNOPTIC AND MESOSCALE WEATHER CONDITIONS DURING AIR POLLUTION EPISODES IN ATHENS, GREECE

    E-Print Network [OSTI]

    Pielke, Roger A.

    KALLOS (1), PAVLOS KASSOMENOS (1) and ROGER A. P1ELKE (2) (1) UniversityofAthens, Dept. ofApplied Physics portion of their surface is covered by pine forests. There are three hills up to 200 m inside the basin

  1. On-Road Remote Sensing of Automobile Emissions in the Los Angeles Area: Year 2

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Los Angeles Area: Year 2 Sajal S. Pokharel Alpharetta, GA. 30022 Contract No. E-23-4 #12;On-Road Remote Sensing in the Los Angeles Area: Year 2 2 EXECUTIVE SUMMARY The University of Denver conducted the second year of a five year remote sensing study

  2. On-Road Remote Sensing of Automobile Emissions in the Los Angeles Area: Year 3

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Los Angeles Area: Year 3 (Riverside) Sajal S., Suite 140 Alpharetta, GA. 30022 Contract No. E-23-4 #12;On-Road Remote Sensing in the Los Angeles Area sensing study in the Los Angeles, CA area. The remote sensor used in this study is capable of measuring

  3. Distributed Road Grade Estimation

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Distributed Road Grade Estimation for Heavy Duty Vehicles PER SAH LHOLM Doctoral Thesis in Automatic Control Stockholm, Sweden 2011 #12;Distributed Road Grade Estimation for Heavy Duty Vehicles PER state-of-charge control decrease the energy consumption of vehicles and increase the safety

  4. Remote Sensing Messungen zur on-road Bestimmung der

    E-Print Network [OSTI]

    Denver, University of

    LUBETRAX Remote Sensing Messungen zur on-road Bestimmung der Abgase von schweren Motorfahrzeugen, Chur, Zürich, Brugg Dr. Peter Maly (Projektleitung) Dr. Stefan Scherer Dr. G.A. Bishop (Remote Sensing;Inhaltsverzeichnis Zusammenfassung 1 1. Einleitung und Zielsetzung 3 1.1 Remote Sensing Messungen (FEAT) 4 1

  5. MSc STUDY PROGRAMME IN THE FACULTY OF GEOLOGY AND GEOENVIRONMENT, UNIVERSITY OF ATHENS 201314 Geology and Geoenvironment

    E-Print Network [OSTI]

    Kouroupetroglou, Georgios

    MSc STUDY PROGRAMME IN THE FACULTY OF GEOLOGY AND GEOENVIRONMENT, UNIVERSITY OF ATHENS 201314 1 Geology and Geoenvironment MSc Programme STUDENT HANDBOOK Applied Environmental Geology, Stratigraphy Paleontology, Geography and Environment, Dynamic Geology and Tectonics/ Hydrogeology, Geophysics

  6. Rapid road repair vehicle

    DOE Patents [OSTI]

    Mara, Leo M. (Livermore, CA)

    1998-01-01

    Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find an the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was was heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past.

  7. Rapid road repair vehicle

    DOE Patents [OSTI]

    Mara, L.M.

    1998-05-05

    Disclosed is a rapid road repair vehicle capable of moving over a surface to be repaired at near normal posted traffic speeds to scan for and find at the high rate of speed, imperfections in the pavement surface, prepare the surface imperfection for repair by air pressure and vacuum cleaning, applying a correct amount of the correct patching material to effect the repair, smooth the resulting repaired surface, and catalog the location and quality of the repairs for maintenance records of the road surface. The rapid road repair vehicle can repair surface imperfections at lower cost, improved quality, at a higher rate of speed than was not heretofor possible, with significantly reduced exposure to safety and health hazards associated with this kind of road repair activities in the past. 2 figs.

  8. Reading Room | Department of Energy

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

    Energy Public Reading Room 1166 Athens Tech Road Elberton, GA 30635-6711 Contact: Joel Seymour Phone: 706-213-3800 Fax: 706-213-3884 Email: joels@sepa.doe.gov Strategic Petroleum...

  9. Impact of solar activity on climate changes in Athens region, Greece

    E-Print Network [OSTI]

    Gizani, Nectaria A B; Vatikiotis, Leonidas; Zervas, Efthimios

    2011-01-01

    The scope of this work is to study the role that the solar weather plays in terrestrial weather. For this reason we study the effect of the solar activity on the climate changes in Greece. In the current work we look for possible correlation between the solar activity data spanning the years from 1975 to 2000 and the meteorological data from two weather stations based inside the city of Athens, Greece (New Philadelphia) and in greater Athens in the north of Attica (Tatoi area). We examine the annual variations of the average values of six meteorological parameters: temperature, atmospheric pressure, direction and intensity of wind, rainfall and relative air humidity. The solar data include decade variations, within the above period, of the solar irradiance, mean sunspot number between two solar cycles, magnetic cycle influence, and solar UV driving of climate (radio flux).

  10. Rapid road repair vehicle

    DOE Patents [OSTI]

    Mara, Leo M. (Livermore, CA)

    1999-01-01

    Disclosed are improvments to a rapid road repair vehicle comprising an improved cleaning device arrangement, two dispensing arrays for filling defects more rapidly and efficiently, an array of pre-heaters to heat the road way surface in order to help the repair material better bond to the repaired surface, a means for detecting, measuring, and computing the number, location and volume of each of the detected surface imperfection, and a computer means schema for controlling the operation of the plurality of vehicle subsystems. The improved vehicle is, therefore, better able to perform its intended function of filling surface imperfections while moving over those surfaces at near normal traffic speeds.

  11. The Bumpy Road to Hydrogen

    E-Print Network [OSTI]

    Sperling, Dan; Ogden, Joan M

    2006-01-01

    It appears to us that hydrogen is a highly promising option06—16 The Bumpy Road to Hydrogen Daniel Sperling Joan OgdenThe Bumpy Road to Hydrogen 1 Daniel Sperling and Joan Ogden

  12. KALELE ROAD Parking Office

    E-Print Network [OSTI]

    FREEWAY H1 KALELE ROAD Parking Office on ground floor Bike Rack Locations Bike Lockers BICYCLE RACK Hale Kahawai Environmental Protection Services Federal Credit Union Energy House & Safety Office Bus Shelter Bus Shelter Art Building Sustainability Courtyard Kuykendall Hall Campus Center Jakuan Tea

  13. ANNOUNCES CLOSURE ALERT ON SEARSVILLE ROAD

    E-Print Network [OSTI]

    : Take Campus Drive West and turn onto Stock Farm Road. Follow Stock Farm to Oak Road and make a left (North & South): Take Sand Hill Road exit, east. Turn right onto Stock Farm Road. Right turn onto Oak (North & South): Take the Embarcadero Road exit, west. Continue on Embarcadero Road to El Camino Real

  14. Politics, Public Opinion, and Project Design in California Road Pricing

    E-Print Network [OSTI]

    Smirti, Megan; Evans, Alexandra; Gougherty, Michael; Morris, Eric

    2007-01-01

    public prefers new sales taxes to road to finance road andthe roads are already paid for through taxes (5). Goldsmith

  15. International Conference on Experiments/Process/System Modeling/Simulation/Optimization Athens, 6-9 July, 2011

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    -EpsMs0 Athens, 6-9 July, 2011 © IC-EpsMsO NUMERICAL SIMULATION IN VERTICAL WIND AXIS TURBINE WITH PITCH turbine (HAWTs) and vertical-axis wind turbine (VAWTs)The present study concerns a small VAWT technology.simonet@ensam.eu Keywords: numerical simulation, performance coefficient, unsteady simulation, VAWT, vertical axis, wind

  16. Road to Net Zero (Presentation)

    SciTech Connect (OSTI)

    Glover, B.

    2011-05-01

    A PowerPoint presentation on NREL's Research Support Facility (RSF) and the road to achieving net zero energy for new construction.

  17. President's House Price's Fork Road

    E-Print Network [OSTI]

    President's House Price's Fork Road Inn at Virginia Tech and Skelton Conference Center HOKIE BIKE HUB Media Hall Fralin Biotechnology Center Greenhouses Air Conditioning Plant Southgate Center Addition Sandy South Drillfield Drive WestCampusDrive Alumni Mall Washington Street SpringRoad Sterre Perry Street Kent

  18. RESTRICTED ACCESS to Groat Road

    E-Print Network [OSTI]

    MacMillan, Andrew

    RESTRICTED ACCESS to Dudely B Menzies Bridge to Kinsmen Park to High Level Bridge to Groat Road 89 Ave Edinboro Road Saskatchewan Drive Saskatchewan Drive Saskatchewan Drive 88 Corbett Field West Aberhart Centre Childcare Centre South Field Car Park Thermal Energy Storage Corbett Hall Canadian Blood

  19. East Avenue Truck Inspection Patterson Pass Road Vasco Road

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

    Office to be badged Sandia National Laboratories 7011 East Avenue Livermore, CA 94551 Tesla Road Interstate 580 - From OaklandSan Francisco Map Not to Scale Map Not to Scale To...

  20. Understanding Road Usage Patterns in Urban Areas

    E-Print Network [OSTI]

    decreases the roads' level of service, while at the same time increasing both fuel consump- tion5Understanding Road Usage Patterns in Urban Areas Pu Wang1,2 , Timothy Hunter4 , Alexandre M. Bayen4 patterns in urban road usage. We find that the major usage of each road segment can be traced to its own

  1. Panos Antsaklis and Kevin Passino, "Introduction to Intelligent Control Systems with High Degrees of Autonomy," in Greek, T echnical R e v i ew M onthly , Athens, Greece, pp 24-35, No 26, March 1994.

    E-Print Network [OSTI]

    Antsaklis, Panos

    of Autonomy," in Greek, T echnical R e v i ew M onthly , Athens, Greece, pp 24-35, No 26, March 1994. #12 of Autonomy," in Greek, T echnical R e v i ew M onthly , Athens, Greece, pp 24-35, No 26, March 1994. #12 of Autonomy," in Greek, T echnical R e v i ew M onthly , Athens, Greece, pp 24-35, No 26, March 1994. #12

  2. Yilun Jiang 220 Handan Road

    E-Print Network [OSTI]

    Paytan, Adina

    Yilun Jiang 220 Handan Road Shanghai 200433, China telephone: 86- 21- 5566- 4267 mobile phone: 86., Zhuang, G., Lin, Y., Li, J., Jiang, Y., Fu, J. S.: The emissions of fine organic aerosol from

  3. Respiratory Protective 231 Corstorphine Road

    E-Print Network [OSTI]

    1 Respiratory Protective Equipment 231 Corstorphine Road Edinburgh EH12 7AT www.forestry.gov.uk J U to sustain life. · The equipment used must be suitable for the intended purpose. This means it must provide

  4. BOARD OF DIRECTORS UCHCFC CIRCLE ROAD CORP.

    E-Print Network [OSTI]

    was also notified that the IRS issued a determination that the Circle Road Corp was tax exempt underBOARD OF DIRECTORS OF THE UCHCFC CIRCLE ROAD CORP. MINUTES OF THE SEPTEMBER 29, 2014 MEETING BOARD

  5. WAMweisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    WAMweisman art museum press release 333 east river road minneapolis, MN 55455 www government that allowed tax-supported institutions (like the University of Minnesota) to acquire these works: The Weisman is located at 333 E. River Road in

  6. Effects of weaving on frontage road operations 

    E-Print Network [OSTI]

    Jacobson, Marc Stuart

    1997-01-01

    Frontage roads parallel to freeways provide access to development adjacent to the freeway while maintaining the primary mobility function of the main lanes. Weaving occurs on frontage roads as exiting vehicles attempt to reach access points...

  7. Texas Toll Road Primer Final Report

    E-Print Network [OSTI]

    Texas Toll Road Primer Final Report PRC 14-3 F #12;Texas Toll Road Primer Texas A&M Transportation ............................................................................................... 11 Texas Legislation and Tolling............................................................ 25 Comparing Texas Toll Facilities to the Nation

  8. QUAD RESIDENCE POND ROAD/SENTINEL ROAD LOT CONSTRUCTION August 21, 2014

    E-Print Network [OSTI]

    QUAD RESIDENCE POND ROAD/SENTINEL ROAD LOT CONSTRUCTION August 21, 2014 Further to the notice issued on July 25 in regards to changes to the Sentinel and Pond Road parking lots flowing from the Quad and the Pond Road parking lots. Effective September 1, 2014 the remaining southern portion of the Sentinel

  9. UMTS on the Road: Broadcasting Intelligent Road Safety Information via MBMS

    E-Print Network [OSTI]

    Zemen, Thomas

    UMTS on the Road: Broadcasting Intelligent Road Safety Information via MBMS Danilo Valerio, Fabio, intersection safety, road congestion warning, accident warning, etc. All these services aim at increasing road resources imposing a severe limit to the sustainable number of users. In this work we quantify this limit

  10. Forest Roads June 3, 2008

    E-Print Network [OSTI]

    Bolding, M. Chad

    or encroach on streamside management zones (SMZs). Best Management Practices (BMP) compliance checks and streamside management zones will also be covered. This course is designed for foresters, timber buyers with numerous classroom and field exercises designed to improve the skills used in timber ac- cess road planning

  11. Virtual Scanning Algorithm for Road Network Surveillance

    E-Print Network [OSTI]

    Jeong, Jaehoon "Paul"

    Virtual Scanning Algorithm for Road Network Surveillance Jaehoon Jeong, Student Member, IEEE, Yu Gu a VIrtual Scanning Algorithm (VISA), tailored and optimized for road network surveillance. Our design roadways and 2) the road network maps are normally known. We guarantee the detection of moving targets

  12. KALELE ROAD D Dormitory Lot

    E-Print Network [OSTI]

    FREEWAY H1 KALELE ROAD VV D D D D D D D D D U U U U U U U U U U C C U U U U A A A A A A A C C C VV Kuahine Hale Kahawai Environmental Protection Services Federal Credit Union Energy House & Safety Office Shelter Art Building Sustainability Courtyard Kuykendall Hall UH Bookstore Jakuan Tea House Sinclair

  13. ISET Journal of Earthquake Technology, Technical Note, Vol. 40, No.1, March 2003, pp. 77-97 ATHENS EARTHQUAKE OF 7 SEPTEMBER 1999

    E-Print Network [OSTI]

    Gupta, Vinay Kumar

    ISET Journal of Earthquake Technology, Technical Note, Vol. 40, No.1, March 2003, pp. 77-97 ATHENS EARTHQUAKE OF 7 SEPTEMBER 1999: INTENSITY MEASURES AND OBSERVED DAMAGES A. Elenas Department of Civil Engineering Institute of Structural Mechanics and Earthquake Engineering Democritus University of Thrace GR

  14. A Test of a Strong Ground Motion Prediction Methodology for the 7 September 1999, Mw=6.0 Athens Earthquake

    SciTech Connect (OSTI)

    Hutchings, L; Ioannidou, E; Voulgaris, N; Kalogeras, I; Savy, J; Foxall, W; Stavrakakis, G

    2004-08-06

    We test a methodology to predict the range of ground-motion hazard for a fixed magnitude earthquake along a specific fault or within a specific source volume, and we demonstrate how to incorporate this into probabilistic seismic hazard analyses (PSHA). We modeled ground motion with empirical Green's functions. We tested our methodology with the 7 September 1999, Mw=6.0 Athens earthquake, we: (1) developed constraints on rupture parameters based on prior knowledge of earthquake rupture processes and sources in the region; (2) generated impulsive point shear source empirical Green's functions by deconvolving out the source contribution of M < 4.0 aftershocks; (3) used aftershocks that occurred throughout the area and not necessarily along the fault to be modeled; (4) ran a sufficient number of scenario earthquakes to span the full variability of ground motion possible; (5) found that our distribution of synthesized ground motions span what actually occurred and their distribution is realistically narrow; (6) determined that one of our source models generates records that match observed time histories well; (7) found that certain combinations of rupture parameters produced ''extreme'' ground motions at some stations; (8) identified that the ''best fitting'' rupture models occurred in the vicinity of 38.05{sup o} N 23.60{sup o} W with center of rupture near 12 km, and near unilateral rupture towards the areas of high damage, and this is consistent with independent investigations; and (9) synthesized strong motion records in high damage areas for which records from the earthquake were not recorded. We then developed a demonstration PSHA for a source region near Athens utilizing synthesized ground motion rather that traditional attenuation. We synthesized 500 earthquakes distributed throughout the source zone likely to have Mw=6.0 earthquakes near Athens. We assumed an average return period of 1000 years for this magnitude earthquake in the particular source zone, thereby having simulated a catalog of ground motion for a period of 500,000 years. The distribution of traditional ground motion parameters of peak acceleration or spectral ordinates then becomes the synthesized record from which we develop hazard curves in the form of the annual probability of exceedance. This approach replaces the aleatory uncertainty that current PSHA studies estimate by regression of empirical parameters from the worldwide database with epistemic uncertainty on what specific sources actually do at specific sites. This is a fundamental change for PSHA and eliminates the need to extrapolate current empirical data that was gathered over about 50 years to represent values for 10{sup -3} annual probability of exceedance or less. This difference becomes especially significant for very sensitive structures that require estimates for 10{sup -5} or less exceedance.

  15. East Avenue Truck Inspection Patterson Pass Road Vasco Road

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansas Nuclear Profile 2010Mesoscopy andSaving onEarth Day EarthVasco Road

  16. Transits of Venus and Solar diameter measures from ground: method and results from Athens (2004) and Huairou (2012)

    E-Print Network [OSTI]

    Sigismondi, Costantino; Wang, Xiaofan; Xie, Wenbin; Carinci, Massimo; Mimmo, Alessio

    2015-01-01

    The variation of the solar diameter in time and in position angle has implications in astrophysics and in general relativity, as the long series of studies attest. The Transits of Venus in 2004 and 2012 have been carefully studied because of the rarity of the phenomenon and its historical importance due the AU measure and to the discovery of Venus atmosphere. The characterization of Venus atmosphere and the measure of the solar diameter to the milliarcsecond level of precision have been studied also from satellite images. The results of the solar diameter measurements made with the observations in Athens (2004) and at the Huairou Solar Observing Station in China (2012) are presented. The topic of the oblateness of the Sun at sunset and its intrinsic value is drafted to introduce the general public to the relativistic relevance of measuring the solar figure, in the occasion of the International Year of Light 2015.

  17. Decommissioning abandoned roads to protect fish

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

    Decommissioning-abandoned-roads-to-protect-fish Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects...

  18. A Road Through Mali-Kuli: A Novel

    E-Print Network [OSTI]

    Dobson, Tracy

    2002-01-01

    Review: A Road Through Mali-Kuli: A Novel By Agi KissUSA Agi Kiss. A Road Through Mali-Kuli: A Novel. Washington,mystery, A Road Through Mali-Kuli stimulates thought about

  19. On-Road Emissions in Asia Measured by Remote Sensing.

    E-Print Network [OSTI]

    Denver, University of

    On-Road Emissions in Asia Measured by Remote Sensing. · Donald H. Stedman, Gary A. Bishop on-road advantage · Large on-road emissions cause poor air quality. · Remote sensing measures on

  20. ENERGY STRATEGY: THE ROAD NOT TAKEN?

    E-Print Network [OSTI]

    Kammen, Daniel M.

    ENERGY STRATEGY: THE ROAD NOT TAKEN? By Amory B. Lovins Two road5 diverged in a wood, and I-- I concepts in energy strategy by outlining and contrasting two en- ergy paths tbat the United States might. His latest books are World Energy Strategies: Facts, Issues, and Options and (with Dr. J. H. Price

  1. On-Road Motor Vehicle Emissions Measurements

    E-Print Network [OSTI]

    Denver, University of

    On-Road Motor Vehicle Emissions Measurements Worldwide -------- www.feat.biochem.du.edu Sajal S but ... Measured grams pollutant per kg of fuel from RSD -quantifiable uncertainty Fuel sales from tax department(tons/day) RSD IM MOBILE5b #12;Implications · RSD method ideal for realistic on-road mobile source emissions

  2. Title: National Road Network: Ontario Data Creator /

    E-Print Network [OSTI]

    Title: National Road Network: Ontario Data Creator / Copyright Owner: Ontario Ministry of Natural/A Keywords (Place): Ontario Keywords (Subject): Roads Restrictions: Data are subject to the GeoBase Unrestricted Use Licence Agreement. Access: Online linkage: http://www.geobase.ca Citation: Ontario. Ministry

  3. KALELE ROAD PARKING PERMIT ZONESPARKING PERMIT ZONES

    E-Print Network [OSTI]

    Greenhouses Institute for Astronomy University of Hawai`i Press Federal Credit Union Energy House & SafetyFREEWAY H1 KALELE ROAD PARKING PERMIT ZONESPARKING PERMIT ZONES 2010 - 20112010 - 2011 Parking Services Office · 2600 Campus Road, Room 014 · Honolulu, HI 96822 · www.hawaii.edu/parking · parking

  4. WAMweisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    WAMweisman art museum press release 333 east river road minneapolis, MN 55455 www per person (current Individual and Dual level members) FREE for members at the Sustainer level: The Weisman is located at 333 E. River Road in Minneapolis. There is no admission fee to the Weisman

  5. Climate policies for road transport revisited (I): Evaluation...

    Open Energy Info (EERE)

    policies for road transport revisited (I): Evaluation of the current framework Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Climate policies for road transport...

  6. Comparison of On-Road Portable and Bench Emission Measurements...

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

    Comparison of On-Road Portable and Bench Emission Measurements Comparison of On-Road Portable and Bench Emission Measurements Chassis dynamometer testing using a conventional...

  7. Electricity for road transport, flexible power systems and wind...

    Open Energy Info (EERE)

    Electricity for road transport, flexible power systems and wind power (Smart Grid Project) Jump to: navigation, search Project Name Electricity for road transport, flexible power...

  8. AlGaN/GaN-based power semiconductor switches

    E-Print Network [OSTI]

    Lu, Bin, Ph. D. Massachusetts Institute of Technology

    2013-01-01

    AlGaN/GaN-based high-electron-mobility transistors (HEMTs) have great potential for their use as high efficiency and high speed power semiconductor switches, thanks to their high breakdown electric field, mobility and ...

  9. Lighting and Dark Sky Regulations

    E-Print Network [OSTI]

    Radcliffe, David

    Lighting and Dark Sky Regulations Marjorie Palmer Spring 2008 #12;The UGA Land Use Clinic provides Road, Room 101 Athens, GA 30602-1510 (706) 583-0373 · Fax (706) 583-0612 jroskie@uga.edu #12;Lighting......................................................................................................................................1 II. Approaches to Lighting Regulation

  10. An Analysis of Development

    E-Print Network [OSTI]

    Radcliffe, David

    , Managing Attorney UGA Land Use Clinic 110 Riverbend Road, Room 101 Athens, GA 30602-1510 (706) 583 and sewer connections, public safety, and transportation improvements. As studies have shown, the tax in the form of higher taxes. If funds are not immediately available for the local government to accommodate

  11. Supplementary Information Adsorption and oxidation of fluoroquinolone antibacterial agents and

    E-Print Network [OSTI]

    Huang, Ching-Hua

    Station Road, Athens, GA 30605 Text S1. Synthesis of goethite. Text S2. Reaction setup. Fig. S1. SEM evolution from the oxidation of CIP by Syn-FeOOH. 1 #12;Text S1. Synthesis of goethite. Briefly, 283 g of Fe and structurally related amines in the presence of goethite Huichun Zhang1 , Ching-Hua Huang* School of Civil

  12. On-road remote sensing of vehicle emissions in

    E-Print Network [OSTI]

    Denver, University of

    On-road remote sensing of vehicle emissions in the Auckland Region August 2003 Technical 1877353000 www.arc.govt.nz #12;TP 198 On-Road Remote Sensing of Vehicle Emissions in the Auckland Region #12;Page i TP 198 On-Road Remote Sensing of Vehicle Emissions in the Auckland Region On-road remote sensing

  13. Research Article Effects of Roads and Crabbing Pressures

    E-Print Network [OSTI]

    Dorcas, Michael E.

    Research Article Effects of Roads and Crabbing Pressures on Diamondback Terrapin Populations tidal creeks to evaluate the current relationships between road and crabbing pressures and the abundance to proximity to roads. Sex ratios did not vary significantly with crabbing activity or proximity to roads

  14. A SENSOR AND DATA FUSION ALGORITHM FOR ROAD GRADE ESTIMATION

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    A SENSOR AND DATA FUSION ALGORITHM FOR ROAD GRADE ESTIMATION Per Sahlholm Henrik Jansson Ermin presents a road grade estimation algorithm for fusion of GPS and vehicle real-time sensor data, with measurements from previous runs over the same road segment. The resulting road grade estimate is thus enhanced

  15. Road Infrastructure and Climate Change in Vietnam

    E-Print Network [OSTI]

    Chinowsky, Paul

    Climate change is a potential threat to Vietnam’s development as current and future infrastructure will be vulnerable to climate change impacts. This paper focuses on the physical asset of road infrastructure in Vietnam ...

  16. Savage Arms Sales Office 118 Mountain Road

    E-Print Network [OSTI]

    New Hampshire, University of

    Savage Arms Sales Office 118 Mountain Road Suffield, Ct. 06078 Phone: (413) 642-4121 Fax: (860) 668 to change.) California orders will also need the Dealers CFD# Sales Tax must be added for orders shipping

  17. HCEI Road Map: 2011 Edition (Brochure)

    SciTech Connect (OSTI)

    Braccio, R.; Finch, P.

    2011-08-01

    This road map outlines the 2011 key goals and strategies of the Hawaii Clean Energy Initiative, was founded based on a Memorandum of Understanding between the State of Hawaii and the U.S. Department of Energy in 2008.

  18. Campus Services 1951 East-West Road

    E-Print Network [OSTI]

    Campus Services 1951 East-West Road Honolulu, Hawai`i 96822 Telephone: (808) 956-2980 Fax: (808 the current economic climate and the salary cuts that many of our employees are experiencing. We arrived

  19. TUDelftLibrary A Long Road.

    E-Print Network [OSTI]

    van Vliet, Lucas J.

    TUDelftLibrary A Long Road. A Short Version. TU Delft Library: Roadmap 2014-2020 Summary #12 in this process, we are committed to achieving this mission. We fully understand that sustainable access

  20. Sarah Shannon, Director 777 Glades Road

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Sarah Shannon, Director 777 Glades Road Building 44, Room 277 Phone:561/297-3749 Fax: 561 from the state or Florida Atlantic University. The IOG sustains itself primarily through income derived

  1. 1Copyright W. Maly SIA Road MapSIA Road Map

    E-Print Network [OSTI]

    Maly, Wojciech P.

    Wojciech Maly Department of Electrical and Computer EngineeringDepartment of Electrical and Computer Engineering1Copyright © W. Maly SIA Road MapSIA Road Map andand DESIGN&TESTDESIGN&TEST Wojciech MalyCopyright © W. Maly ObjectiveObjective D&T Current and Future ProblemsD&T Current and Future Problems Future

  2. Road Pricing1 The Department for Transport's Feasibility Study of Road Pricing in the UK2

    E-Print Network [OSTI]

    Kelly, Frank

    that a well-targeted national road pricing scheme could achieve £10 billion worth of time savings a year, and the cost to the user of motoring has remained approximately constant ­ all measured in real terms. On economic efficiency grounds, the cost to the user of roads is too low overall, especially on congested

  3. University of North Carolina Wilmington 601 S. College Road

    E-Print Network [OSTI]

    Olszewski Jr., Edward A.

    University of North Carolina Wilmington 601 S. College Road Wilmington NC 28403-5951 910: University of North Carolina Wilmington Office of Scholarships and Financial Aid 601 S. College Road

  4. American Road: Clean Diesels for the Real World | Department...

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

    American Road: Clean Diesels for the Real World American Road: Clean Diesels for the Real World Perspectives on clean diesels and public policy as it is developing in the US, as...

  5. Development of a routing application with a heighted road network 

    E-Print Network [OSTI]

    Vasileiadis, Konstantinos

    2007-11-17

    According to Ordnance Survey (OS), the Integrated Transport Network (ITN) layer is the definitive, most accurate and up-to-date geographic reference for Great Britain’s road structure representing all navigable roads, from ...

  6. Make Your Next Road Trip Fuel Efficient | Department of Energy

    Energy Savers [EERE]

    Efficient June 29, 2015 - 3:02pm Addthis Enjoy the open road while keeping your fuel costs low | Photo courtesy of istockphoto.comlisegagne Enjoy the open road while keeping...

  7. Forest Products Road Manual: A Handbook for Municipal Officials

    E-Print Network [OSTI]

    New Hampshire, University of

    Forest Products Road Manual: A Handbook for Municipal Officials and The Forest Products Industry: University of New Hampshire Cooperative Extension with support from: Sustainable Forestry Initiative N............................................................................................................................2 Road Access

  8. On the Road with Fuel Saving Tools | Department of Energy

    Office of Environmental Management (EM)

    On the Road with Fuel Saving Tools On the Road with Fuel Saving Tools May 23, 2014 - 11:07am Addthis Driving efficiently can help you save money on gas this summer.| Photo courtesy...

  9. NELIOTA: ESA's new NEO lunar impact monitoring project with the 1.2m telescope at the National Observatory of Athens

    E-Print Network [OSTI]

    Bonanos, A Z; Boumis, P; Bellas-Velidis, I; Maroussis, A; Dapergolas, A; Fytsilis, A; Charmandaris, V; Tsiganis, K; Tsinganos, K

    2015-01-01

    NELIOTA is a new ESA activity launched at the National Observatory of Athens in February 2015 aiming to determine the distribution and frequency of small near-earth objects (NEOs) via lunar monitoring. The project involves upgrading the 1.2m Kryoneri telescope at the National Observatory of Athens, procuring two fast-frame cameras, and developing a software system, which will control the telescope and the cameras, process the images and automatically detect NEO impacts. NELIOTA will provide a web-based user interface, where the impact events will be reported and made available to the scientific community and the general public. The objective of this 3.5 year activity is to design, develop and implement a highly automated lunar monitoring system, which will conduct an observing campaign for 2 years in search of NEO impact flashes on the Moon. The impact events will be verified, characterised and reported. The 1.2m telescope will be capable of detecting flashes much fainter than current, small-aperture, lunar m...

  10. The Middle East Roads, Bridges and Tolls

    E-Print Network [OSTI]

    Nagurney, Anna

    EconomicCrisis ­ Expatriatejobscut ­ Overconges8on · DubaiWorld'sDebt ­ Slowedexpansion ­ AbuDhabiBailout #12;Negatives Low Housing#12;#12;The Middle East #12;Dubai #12;#12;#12;#12;#12;#12;Roads, Bridges and Tolls RTA Two Major longest automatic driverless system in the world Red (2009) and Green Line (2010) 87 Trains 74

  11. 35 Colovos Road Univ. of New Hampshire

    E-Print Network [OSTI]

    UNHSC Gregg Hall 35 Colovos Road Univ. of New Hampshire Durham, NH 03824 603.862.3957 fax Thomas in New Hampshire showed that traditional stormwater technolo- gies failed in reducing at least one water or present unique conditions. Under new Clean Water Act Phase II rules, the Environmental Protection Agency

  12. Weisman Art Museum 333 East River Road

    E-Print Network [OSTI]

    Thomas, David D.

    Weisman Art Museum 333 East River Road Minneapolis, MN 55455 Contact: Erin Lauderman (612) 625 TREASURES: HIGHLIGHTS FROM THE MINNESOTA MUSEUM OF AMERICAN ART Exhibition dates: February 2 ­ May 12, 2013 MINNEAPOLIS ­ The Weisman Art Museum at the University of Minnesota, will feature the Minnesota Museum

  13. WAMweisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    WAMweisman art museum press release 333 east river road minneapolis, mn 55455 www through May 24, 2009 at the Weisman Art Museum. Changing Identity is the first-ever major U.S. exhibition the country opened itself to the West twenty years ago. Contempo- rary Vietnamese art has seen newfound

  14. WAMweisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    WAMweisman art museum press release 333 east river road minneapolis, MN 55455 www available upon request (continued) Changing Hands: Art Without Reservation Contemporary Native North American Art from the West, Northwest, and Pacific Exhibition dates: October 26, 2007­January 13, 2008

  15. weisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    weisman art museum press release 333 east river road minneapolis, mn 55455 www through January 10, 2010 Opening reception: October 23, 2009, 5­8 p.m. Minneapolis, MN--The Weisman Art from 5 to 8 p.m.. The exhibition showcases a gift to the Weisman of fifty works of art from New York

  16. WAMweisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    WAMweisman art museum press release 333 east river road minneapolis, mn 55455 www images available upon request (see last page of release) WEISMAN ART MUSEUM 2009­2010 EXHIBITION SEASON REFLECTS "ART AND THE EVERYDAY" Minneapolis, MN--Home videos posted on YouTube. Personal photos shared

  17. 5200 N. Lake Road Merced, CA 95343

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    5200 N. Lake Road Merced, CA 95343 Phone 209-228-7178 Fax 209-228-7861 E-mail: finaid on the FAFSA, not claiming the student as a dependent on a tax return, or a student's demonstration of self

  18. Finance forum.........................2 LTAP Roads Scholars.............3

    E-Print Network [OSTI]

    Minnesota, University of

    · Finance forum.........................2 · LTAP Roads Scholars.............3 · CTS Executive on page 3 Value capture continued on page 2 Current funding and finance mechanisms for transportation face completed research project led by CTS. "The project provides new financing meth- ods that are not currently

  19. Bridge Detection By Road Detection Jeff Kaufman

    E-Print Network [OSTI]

    Danner, Andrew

    Bridge Detection By Road Detection Jeff Kaufman cbr@sccs.swarthmore.edu 1 Introduction It is useful, with local min- ima: cells from which there is no direction of descent. A common cause of this is bridges. The area over which a bridge passes shows up in the digital elevation as being of a height greater than

  20. weisman art museum 333 east river road

    E-Print Network [OSTI]

    Thomas, David D.

    and rules about what art should be. "Pop artists like Warhol were using ordinary subject matter to critiqueweisman art museum press release 333 east river road minneapolis, mn 55455 www images available (see thumbnails on final page of this document) EXHIBITION COMMON SENSE: ART

  1. WP1 Climate services for road

    E-Print Network [OSTI]

    Haak, Hein

    WP1 Climate services for road authorities Janette Bessembinder et al. #12;2 A1: review, analysis and assessment of existing climate change projections regarding TEN-T needs A2: Development of a common methodology for the production of regional climate projections to provide consistent input data for risk

  2. Longer View The Road Less Driven

    E-Print Network [OSTI]

    Handy, Susan L.

    Longer View The Road Less Driven Susan Handy I n September 2005, Hurricane Katrina slammed into New.S. Department of Energy [DOE], 2005a), a level unseen in inflation-adjusted terms even at the peak of the late 1970s energy crisis (DOE, 2005b). Shortages in the gasoline supply occurred temporarily in many parts

  3. EFFLUENT DISPERSION FROM THE LANSDOWNE ROAD

    E-Print Network [OSTI]

    Esplanade North Vancouver, B.C. V7M 3H7 and City of Prince George 505 Fourth Avenue Prince George, B.C. V2L- ACKNOWLEDGEMENT This project was jointly funded by the City of Prince George and Environment Canada through plume delineation study was carried out at the Prince George Lansdowne Road Wastewater Treatment Centre

  4. ORIGINAL PAPER Wild Turkey (Meleagris gallopavo) association to roads

    E-Print Network [OSTI]

    Wallace, Mark C.

    ORIGINAL PAPER Wild Turkey (Meleagris gallopavo) association to roads: implications for distance roads. Our objective was to determine if and when Rio Grande wild turkeys (Meleagris gallopavo gallopavo intermedia . Rio Grande wild turkey. Roads . Texas Communicated by H. Kierdorf D. R. Erxleben :M

  5. Privacy Enhanced Fraud Resistant Road Pricing (extended abstract)

    E-Print Network [OSTI]

    Hoepman, Jaap-Henk

    for the current road tax. The announcement of the Dutch authorities stirred a large public debate which stillPrivacy Enhanced Fraud Resistant Road Pricing (extended abstract) Jaap-Henk Hoepman1,2 , George, University of Groningen, the Netherlands g.b.huitema@rug.nl Abstract. A naive implementation of a road

  6. Eli Lilly and Company Limited Erl Wood Manor, Sunninghill Road,

    E-Print Network [OSTI]

    Bogacka, Barbara

    is immediately before the Windmill public house. Proceed along the Sunninghill Road for a few metres until you). This turning is immediately before the Windmill public house. #12; Proceed along the Sunninghill Road for a few the Windmill public house. Proceed along the Sunninghill Road for a few metres until you see some wrought iron

  7. Nericell: Rich Monitoring of Roads and Traffic Using Mobile Smartphones

    E-Print Network [OSTI]

    Rajamani, Sriram K.

    Nericell: Rich Monitoring of Roads and Traffic Using Mobile Smartphones Joint work with Prashanth India 1 Ram Ramjee #12;Road and Traffic Monitoring 2 Bangalore Courtesy intersections · Potholes · Road bumps · ... Need to go beyond GPS-based vehicle tracking! #12;Widespread

  8. Using Real-Time Road Traffic Data to Evaluate Congestion

    E-Print Network [OSTI]

    Cambridge, University of

    Using Real-Time Road Traffic Data to Evaluate Congestion Jean Bacon, Andrei Iu. Bejan, Alastair R regression, spline interpolation. 1 Introduction Congestion on roads, especially in urban areas, has a large kilometres in 2008 [2]. #12;Congestion can be tackled either by increasing road network capacity

  9. Road Transport Informatics -Conceptual Framework and Technologica Components

    E-Print Network [OSTI]

    Aamodt, Agnar

    Road Transport Informatics - Conceptual Framework and Technologica Components Dr. Techn. Mads Nyg of informationtech- nology within the road transport field. The main motivation for our investigation framework for road transport informatics in order to estab- lish a common basis for researchers from both

  10. CITY OF PRINCE GEORGE: SNOW DISPOSAL AT THE LANSDOWNE ROAD

    E-Print Network [OSTI]

    #12;CITY OF PRINCE GEORGE: SNOW DISPOSAL AT THE LANSDOWNE ROAD WASTEWATER TREATMENT CENTRE DOE FRAPH7 #12;Dayton & Knight Ltd. CITY OF PRINCE GEORGE SNOW DISPOSAL STUDY AT THE LANSDOWNE ROAD of Prince George. #12;CITY OF PRINCE GEORGE SNOW DISPOSAL STUDY AT THE LANSDOWNE ROAD WASTEWATER TREATMENT

  11. College Green -Dunearn Road Hostel Dunearn Road Hostel was opened in 1952 and is now known as

    E-Print Network [OSTI]

    Chin, Wei Ngan

    College Green - Dunearn Road Hostel Dunearn Road Hostel was opened in 1952 and is now known as College Green ­ Dunearn Road Hostel (CG-DRH). These former pre-war terrace homes housed gifts attract a 1:1 government matching grant. Singapore tax residents will receive a tax deduction

  12. Polarization-engineered GaN/InGaN/GaN tunnel diodes

    SciTech Connect (OSTI)

    Krishnamoorthy, Sriram; Nath, Digbijoy N.; Akyol, Fatih; Park, Pil Sung; Esposto, Michele; Rajan, Siddharth [Department of Electrical and Computer Engineering, Ohio State University, Columbus, Ohio 43210 (United States)

    2010-11-15

    We report on the design and demonstration of polarization-engineered GaN/InGaN/GaN tunnel junction diodes with high current density and low tunneling turn-on voltage. Wentzel-Kramers-Brillouin calculations were used to model and design tunnel junctions with narrow band gap InGaN-based barrier layers. N-polar p-GaN/In{sub 0.33}Ga{sub 0.67}N/n-GaN heterostructure tunnel diodes were grown using molecular beam epitaxy. Efficient interband tunneling was achieved close to zero bias with a high current density of 118 A/cm{sup 2} at a reverse bias of 1 V, reaching a maximum current density up to 9.2 kA/cm{sup 2}. These results represent the highest current density reported in III-nitride tunnel junctions and demonstrate the potential of III-nitride tunnel devices for a broad range of optoelectronic and electronic applications.

  13. 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)

    2005-01-01

    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.

  14. Florida Solar Energy Center 1679 Clearlake Road

    E-Print Network [OSTI]

    Wu, Shin-Tson

    Florida Solar Energy Center 1679 Clearlake Road Cocoa, FL 32922 321.638.1000 (Located on the Eastern Florida State College Campus) ANNUAL SECURITY GUIDE 2014-2015 UCF POLICE DEPARTMENT Florida Solar Energy Center #12;2 T H E U N I V E R S I T Y o f C E N T R A L F L O R I D A Keeping our campus

  15. ACCESSING ROAD TRAVEL REPORTS The safest traveler is the well-informed traveler. While road safety conditions in a country affect that country's

    E-Print Network [OSTI]

    Arnold, Jonathan

    ACCESSING ROAD TRAVEL REPORTS The safest traveler is the well-informed traveler. While road safety of countries will appear and you can view each road travel report by clicking "Download Now". #12;

  16. GaInNAs laser gain

    SciTech Connect (OSTI)

    CHOW,WENG W.; JONES,ERIC D.; MODINE,NORMAND A.; KURTZ,STEVEN R.; ALLERMAN,ANDREW A.

    2000-05-23

    The optical gain spectra for GaInNAs/GaAs quantum wells are computed using a microscopic laser theory. From these spectra, the peak gain and carrier radiative decay rate as functions of carrier density are determined. These dependences allow the study of the lasing threshold current density of GaInNAs/GaAs quantum well structures.

  17. Advantages of the Blue InGaN/GaN Light-Emitting Diodes with an AlGaN/GaN/AlGaN Quantum Well Structured Electron Blocking Layer

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    ABSTRACT: InGaN/GaN light-emitting diodes (LEDs) with p-(AlGaN/GaN/AlGaN) quantum well structured electron. The proposed QWEBL LED structure, in which a p-GaN QW layer is inserted in the p-AlGaN electron blocking layer the radiative recombination rates across the active region. Consequently, the light output power was enhanced

  18. Red emitting photonic devices using InGaP/InGaAlP material system

    E-Print Network [OSTI]

    Kangude, Yamini

    2005-01-01

    In this thesis, two red emitting photonic devices are presented using the InGaP/InGaAlP material system. InGaP/InGaAlP material system provides large flexibility in the band gap energy while being lattice matched to GaAs ...

  19. ILENR/RE-AQ-ON-ROAD CARBON MONOXIDE AND HYDROCARBON

    E-Print Network [OSTI]

    Denver, University of

    #12;ILENR/RE-AQ- Printed: Contract: Project: ON-ROAD CARBON MONOXIDE AND HYDROCARBON REMOTE SENSING. Repeat Measurements of the Same Vehicle. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 F

  20. Active DPF for Off-Road Particulate Matter (PM) Control

    Broader source: Energy.gov [DOE]

    This presentation details how a possibly catalyzed active diesel particulate filter can be used to control off-road particulate matter.

  1. Efficiency Improvement in an Over the Road Diesel Powered Engine...

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

    in an Over the Road Diesel Powered Engine System by the Application of Advanced Thermoelectric Systems Implemented in a Hybrid Configuration Efficiency Improvement in an Over the...

  2. Sediment production from forest roads in western Oregon Charles H. Luce and Thomas A. Black

    E-Print Network [OSTI]

    Sediment production from forest roads in western Oregon Charles H. Luce and Thomas A. Black USDA erosion from forest roads requires an understanding of how road design and maintenance affect sediment the relationship between sediment production and road attributes such as distance between culverts, road slope

  3. Timber Road II | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EISTJThin Film Solar Technologies JumpTiSol JumpOffshore Wind FarmRoad II

  4. GaAs, AlGaAs and InGaP Tunnel Junctions for Multi-Junction Solar Cells Under Concentration: Resistance Study

    SciTech Connect (OSTI)

    Wheeldon, Jeffrey F.; Valdivia, Christopher E.; Walker, Alex; Kolhatkar, Gitanja; Hall, Trevor J.; Hinzer, Karin; Masson, Denis; Riel, Bruno; Fafard, Simon; Jaouad, Abdelatif; Turala, Artur; Ares, Richard; Aimez, Vincent

    2010-10-14

    The following four TJ designs, AlGaAs/AlGaAs, GaAs/GaAs, AlGaAs/InGaP and AlGaAs/GaAs are studied to determine minimum doping concentration to achieve a resistance of <10{sup -4} {omega}{center_dot}cm{sup 2} and a peak tunneling current suitable for MJ solar cells up to 1500-suns concentration (operating current of 21 A/cm{sup 2}). Experimentally calibrated numerical models are used to determine how the resistance changes as a function of doping concentration. The AlGaAs/GaAs TJ design is determined to require the least doping concentration to achieve the specified resistance and peak tunneling current, followed by the GaAs/GaAs, and AlGaAs/AlGaAs TJ designs. The AlGaAs/InGaP TJ design can only achieve resistances >5x10{sup -4} {omega}cm{sup 2}.

  5. GaAs MOEMS Technology

    SciTech Connect (OSTI)

    SPAHN, OLGA B.; GROSSETETE, GRANT D.; CICH, MICHAEL J.; TIGGES, CHRIS P.; RENO, JOHN L.; PEAKE, GREGORY M.; KLEM, JOHN F.; LEAN, JEN; FULLER, CHARLES T.; BURKHART, JEFF; BAUER, THOMAS; SULLIVAN, CHARLES T.

    2003-03-01

    Many MEMS-based components require optical monitoring techniques using optoelectronic devices for converting mechanical position information into useful electronic signals. While the constituent piece-parts of such hybrid opto-MEMS components can be separately optimized, the resulting component performance, size, ruggedness and cost are substantially compromised due to assembly and packaging limitations. GaAs MOEMS offers the possibility of monolithically integrating high-performance optoelectronics with simple mechanical structures built in very low-stress epitaxial layers with a resulting component performance determined only by GaAs microfabrication technology limitations. GaAs MOEMS implicitly integrates the capability for radiation-hardened optical communications into the MEMS sensor or actuator component, a vital step towards rugged integrated autonomous microsystems that sense, act, and communicate. This project establishes a new foundational technology that monolithically combines GaAs optoelectronics with simple mechanics. Critical process issues addressed include selectivity, electrochemical characteristics, and anisotropy of the release chemistry, and post-release drying and coating processes. Several types of devices incorporating this novel technology are demonstrated.

  6. Intense terahertz emission from molecular beam epitaxy-grown GaAs/GaSb(001)

    SciTech Connect (OSTI)

    Sadia, Cyril P.; Laganapan, Aleena Maria; Agatha Tumanguil, Mae; Estacio, Elmer; Somintac, Armando; Salvador, Arnel; Que, Christopher T.; Yamamoto, Kohji; Tani, Masahiko

    2012-12-15

    Intense terahertz (THz) electromagnetic wave emission was observed in undoped GaAs thin films deposited on (100) n-GaSb substrates via molecular beam epitaxy. GaAs/n-GaSb heterostructures were found to be viable THz sources having signal amplitude 75% that of bulk p-InAs. The GaAs films were grown by interruption method during the growth initiation and using various metamorphic buffer layers. Reciprocal space maps revealed that the GaAs epilayers are tensile relaxed. Defects at the i-GaAs/n-GaSb interface were confirmed by scanning electron microscope images. Band calculations were performed to infer the depletion region and electric field at the i-GaAs/n-GaSb and the air-GaAs interfaces. However, the resulting band calculations were found to be insufficient to explain the THz emission. The enhanced THz emission is currently attributed to a piezoelectric field induced by incoherent strain and defects.

  7. Microsoft Word - Class 1 S Access Road-031611 FINAL.doc

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

    site using the South Access Road. The South Access Road has been upgraded using the same criteria and design standards as the North Access Road and New Mexico Department of...

  8. Office of Scholarships & Financial Aid 601 S. College Road

    E-Print Network [OSTI]

    Olszewski Jr., Edward A.

    Office of Scholarships & Financial Aid 601 S. College Road Wilmington NC 28403-5951 910 & Financial Aid 601 S. College Road Wilmington NC 28403-5951 910-962-3177 Telephone 910-962-3851 Fax finaid School Code: c STEP 2: Complete an Independent Verification Worksheet and attach your 2014 Federal Tax

  9. A Decade of On-road Emissions Measurements

    E-Print Network [OSTI]

    Denver, University of

    % of the NOx to the national emission inventory (3). In the mid-1990s the Coordinating Research CouncilA Decade of On-road Emissions Measurements G A R Y A . B I S H O P * A N D D O N A L D H . S T E D. A multiyear, on-road emission measurement program carried outinthecitiesof

  10. 190 Ben Burton Road, Suite C Bogart, Georgia 30622 706.354.1800 Fax: 706.354.6867 www.geohydro.com

    E-Print Network [OSTI]

    Arnold, Jonathan

    ) The following table presents seismic design values interpolated from applicable seismic hazard maps from The University of Georgia 382 East Broad Street Athens, Georgia 30602 Revised Report of Probabilistic Seismic probabilistic seismic hazard analysis (PSHA) for the main campus of The University of Georgia in Athens

  11. Windshield Wilderness: Cars, Roads, and Nature in Washington’s National Parks

    E-Print Network [OSTI]

    Anderson, Byron

    2006-01-01

    Review: Windshield Wilderness: Cars, Roads, and Nature inLouter. Windshield Wilderness: Cars, Roads, and Nature inpost-consumer waste. “Cars, not people, are the parks’

  12. Road-crossing restoration on alluvial creeks in the Klamath National Forest, California

    E-Print Network [OSTI]

    Lawrence, Justin E

    2008-01-01

    colonization upstream and downstream of the road-crossingsthis data into upstream and downstream bins to estimate thetaken from traps upstream and downstream of the roads.

  13. Performance Measurement in the Road Sector: A Cross-Country Review...

    Open Energy Info (EERE)

    Performance Measurement in the Road Sector: A Cross-Country Review of Experience Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Performance Measurement in the Road...

  14. Computational analysis of thin film InGaAs/GaAs quantum well solar cells with

    E-Print Network [OSTI]

    Yu, Edward T.

    Computational analysis of thin film InGaAs/GaAs quantum well solar cells with back side light, Austin, TX 78758, USA * ety@ece.utexas.edu Abstract: Simulations of thin film (~2.5 µm thick) InGaAs/GaAs. Roberts, G. Hill, and C. Calder, "Progress in quantum well solar cells," Thin Solid Films 511­512, 76

  15. GaSb/GaAs type II quantum dot solar cells for enhanced infrared spectral response

    E-Print Network [OSTI]

    Jalali. Bahram

    into existing multijunction cells either as a means to increase the current or efficiency by using low band gapGaSb/GaAs type II quantum dot solar cells for enhanced infrared spectral response R. B infrared spectral response of GaAs-based solar cells that incorporate type II GaSb quantum dots QDs formed

  16. New GaInP/GaAs/GaInAs, Triple-Bandgap, Tandem Solar Cell for High-Efficiency Terrestrial Concentrator Systems

    SciTech Connect (OSTI)

    Kurtz, S.; Wanlass, M.; Kramer, C.; Young, M.; Geisz, J.; Ward, S.; Duda, A.; Moriarty, T.; Carapella, J.; Ahrenkiel, P.; Emery. K.; Jones, K.; Romero, M.; Kibbler, A.; Olson, J.; Friedman, D.; McMahon, W.; Ptak, A.

    2005-11-01

    GaInP/GaAs/GaInAs three-junction cells are grown in an inverted configuration on GaAs, allowing high quality growth of the lattice matched GaInP and GaAs layers before a grade is used for the 1-eV GaInAs layer. Using this approach an efficiency of 37.9% was demonstrated.

  17. InGaAsN/GaAs heterojunction for multi-junction solar cells

    DOE Patents [OSTI]

    Kurtz, Steven R. (Albuquerque, NM); Allerman, Andrew A. (Albuquerque, NM); Klem, John F. (Albuquerque, NM); Jones, Eric D. (Edgewood, NM)

    2001-01-01

    An InGaAsN/GaAs semiconductor p-n heterojunction is disclosed for use in forming a 0.95-1.2 eV bandgap photodetector with application for use in high-efficiency multi-junction solar cells. The InGaAsN/GaAs p-n heterojunction is formed by epitaxially growing on a gallium arsenide (GaAs) or germanium (Ge) substrate an n-type indium gallium arsenide nitride (InGaAsN) layer having a semiconductor alloy composition In.sub.x Ga.sub.1-x As.sub.1-y N.sub.y with 0GaAs layer, with the InGaAsN and GaAs layers being lattice-matched to the substrate. The InGaAsN/GaAs p-n heterojunction can be epitaxially grown by either molecular beam epitaxy (MBE) or metalorganic chemical vapor deposition (MOCVD). The InGaAsN/GaAs p-n heterojunction provides a high open-circuit voltage of up to 0.62 volts and an internal quantum efficiency of >70%.

  18. 2009 Voluntary Protection Programs Participants' Association (VPPPA) Presentation: Follow The Yellow Brick Road to Safety

    Broader source: Energy.gov [DOE]

    2009 Voluntary Protection Programs Participants' Association (VPPPA) Presentation: Follow The Yellow Brick Road to Safety

  19. Road Safety in the Context of Urban Development in Sweden and California

    E-Print Network [OSTI]

    McAndrews, Carolyn

    2010-01-01

    Architecture, planning, engineering Road users, vehicles, built environment together with high-technology

  20. Design safer and greener road projects by using a multi-objective evolutionary

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    of safety and sustainability on the European road network. However, few tools or methodologies have been and preventive assessment of the road safety performances and the sustainable aspects of road projects, NSGA-II; performance indicators; sustainability; road safety; 1. Introduction For many years

  1. ROME: Road Monitoring and Alert System through Bin Zan Tingting Sun Marco Gruteser Yanyong Zhang

    E-Print Network [OSTI]

    Gruteser, Marco

    1 ROME: Road Monitoring and Alert System through Geocache Bin Zan Tingting Sun Marco Gruteser, NJ 08902-3390 {zanb,sunting,gruteser,yyzhang}@winlab.rutgers.edu Abstract--We present a road from aggregated readings of multiple devices. For example, road monitoring could infer road defects

  2. Improvement of the Road Traffic Management by an Ant-Hierarchical Fuzzy System

    E-Print Network [OSTI]

    Casillas Barranquero, Jorge

    of the road network capacity [3], the improvement of the traffic safety, the minimization of the energyImprovement of the Road Traffic Management by an Ant-Hierarchical Fuzzy System Habib M. Kammoun@decsai.ugr.es Abstract--In view of dynamicity on road networks and the sharp increase of traffic jam states, the road

  3. ROADTRACK: Scaling Location Updates for Mobile Clients on Road Networks with Query Awareness

    E-Print Network [OSTI]

    Liu, Ling

    ROADTRACK: Scaling Location Updates for Mobile Clients on Road Networks with Query Awareness Peter ROADTRACK ­ a road- network based, query-aware location update framework with two unique features. First, we road-network based check-free inter- val optimization further enhances the effectiveness of the ROAD

  4. Nericell: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones

    E-Print Network [OSTI]

    Rajamani, Sriram K.

    Nericell: Rich Monitoring of Road and Traffic Conditions using Mobile Smartphones Prashanth Mohan@microsoft.com Microsoft Research India, Bangalore ABSTRACT We consider the problem of monitoring road and traffic con to be much more com- plex owing to varied road conditions (e.g., potholed roads), chaotic traffic (e

  5. Band Structure of Strain-Balanced GaAsBi/GaAsN Super-lattices on GaAs

    SciTech Connect (OSTI)

    Hwang, J.; Phillips, J. D.

    2011-05-31

    GaAs alloys with dilute content of Bi and N provide a large reduction in band-gap energy with increasing alloy composition. GaAsBi/GaAsN heterojunctions have a type-II band alignment, where superlattices based on these materials offer a wide range for designing effective band-gap energy by varying superlattice period and alloy composition. The miniband structure and effective band gap for strain-balanced GaAsBi/GaAsN superlattices with effective lattice match to GaAs are calculated for alloy compositions up to 5% Bi and N using the k·p method. The effective band gap for these superlattices is found to vary between 0.89 and 1.32 eV for period thickness ranging from 10 to 100 Å. The joint density of states and optical absorption of a 40/40 Å GaAs0.96Bi0.04/GaAs0.98N0.02 superlattice are reported demonstrating a ground-state transition at 1.005 eV and first excited transition at 1.074 eV. The joint density of states is similar in magnitude to GaAs, while the optical absorption is approximately one order of magnitude lower due to the spatially indirect optical transition in the type-II structure. The GaAsBi/GaAsN system may provide a new material system with lattice match to GaAs in a spectral range of high importance for optoelectronic devices including solar cells, photodetectors, and light emitters.

  6. Magnetism and transport properties of epitaxial Fe-Ga thin films on GaAs(001)

    SciTech Connect (OSTI)

    Duong Anh Tuan; Shin, Yooleemi; Cho, Sunglae; Dang Duc Dung; Vo Thanh Son

    2012-04-01

    Epitaxial Fe-Ga thin films in disordered bcc {alpha}-Fe crystal structure (A2) have been grown on GaAs(001) by molecular beam epitaxy. The saturated magnetization (M{sub S}) decreased from 1371 to 1105 kA/m with increasing Ga concentration from 10.5 to 24.3 % at room temperature. The lattice parameter increased with the increase in Ga content because of the larger atomic radius of Ga atom than that of Fe. The increase in carrier density with Ga content caused in lower resistivity.

  7. Graphene induced remote surface scattering in graphene/AlGaN/GaN heterostructures

    SciTech Connect (OSTI)

    Liu, Xiwen; Li, Dan; Wang, Bobo; Liu, Bin; Chen, Famin; Jin, Guangri; Lu, Yanwu, E-mail: ywlu@bjtu.edu.cn [Department of Physics, Beijing Jiaotong University, Beijing 100044 (China)

    2014-10-20

    The mobilities of single-layer graphene combined with AlGaN/GaN heterostructures on two-dimensional electron gases in graphene/AlGaN/GaN double heterojunction are calculated. The impact of electron density in single-layer graphene is also studied. Remote surface roughness (RSR) and remote interfacial charge (RIC) scatterings are introduced into this heterostructure. The mobilities limited by RSR and RIC are an order of magnitude higher than that of interface roughness and misfit dislocation. This study contributes to designing structures for generation of higher electron mobility in graphene/AlGaN/GaN double heterojunction.

  8. LANL closes road, trails for safety reasons; flooding and erosion...

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

    safety reasons LANL closes road, trails for safety reasons; flooding and erosion control work under way Closure is in response to the increased fire risk and danger of flash...

  9. Valuation of the Indiana Toll Road and Chicago Skyway privatizations

    E-Print Network [OSTI]

    Chaudary, Faiza A. (Faiza Arshad)

    2010-01-01

    This thesis analyzes the economics and financing of the recent purchases of the Indiana Toll Road and Chicago Skyway. Similar privatizations have been occurring around the world, but the economic motive for such transactions ...

  10. Disconnecting Experience: Making World-Class Roads in Mumbai

    E-Print Network [OSTI]

    Anand, Nikhil

    2006-01-01

    Experience: Making World-Class Roads in Mumbai- Nikhil Anandis true. Not all world-class cities have ring freeways. Andof what they call world-class cities. These truth claims

  11. INET 2000 Anderson, Camp The Telecom Road Less Traveled

    E-Print Network [OSTI]

    Camp, L. Jean

    As a Nation · 1,800 miles of railway · 8,500 miles of road ­In comparison Wisconsin has 110,000 · Per capita · Incompetent state-run PTT's need not be immediately destroyed ­ Human cost can be considerable · Competitors

  12. Software Evolution: A Road Map Vclav T. Rajlich

    E-Print Network [OSTI]

    Software Evolution: A Road Map Václav T. Rajlich Department of Computer Science Wayne State nonprofit organizations from sale taxes on certain specific items is such a surprise. Software modification

  13. 1 Cyclotron Road, Building 23 Berkeley, CA 94720

    E-Print Network [OSTI]

    Budker, Dmitry

    1 Cyclotron Road, Building 23 Berkeley, CA 94720 (510) 495-8000 reservation queen or double twin rooms. Tax, parking, wifi and weekday shuttle pass are included in the rate

  14. RV 01/29/2015 5200 N. Lake Road

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    DDSWK_1516 RV 01/29/2015 5200 N. Lake Road Merced, CA 95343 Phone 209-228-7178 Fax 209-228-7861 E (if applicable) and effective dates · Provide a complete copy of your 2013 Federal Tax Transcript

  15. RV 01/29/2015 5200 N. Lake Road

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    SDSWK_1516 RV 01/29/2015 5200 N. Lake Road Merced, CA 95343 Phone 209-228-7178 Fax 209-228-7861 E (if applicable) and effective dates · Provide a complete copy of your 2014 Federal Tax Transcript

  16. The Effect of Removing Accidents Repeaters From the Road

    E-Print Network [OSTI]

    Ferreira, Joseph Jr.

    In newspaper editorials, public commentaries and the like, licensing authorities are often advised to solve the "accident problem" by taking the "nut behind the wheel" off the road. This paper uses six-year driver records ...

  17. 100 ROCKAFELLER ROAD ROOM RESERVATION POLICIES AND PROCEDURES

    E-Print Network [OSTI]

    ARE RESPONSIBLE FOR COMPLIANCE WITH RUTGERS BUSINESS SCHOOL, RUTGERS UNIVERSITY, AND STATE REGULATIONS GOVERNING INDIVIDUALS WILL BE PERMITTED IN THE RUTGERS BUSINESS SCHOOL AT 100 ROCKAFELLER ROAD. DISORDERLY PERSONS

  18. State of roads : public works as research, India circa 1960

    E-Print Network [OSTI]

    Khorakiwala, Ateya A

    2009-01-01

    That the road is a symbol of the prowess of the nation-state seems tautological, a uni"ed phenomenon of political symbolism that manifests as an infrastructural network. When subjected to a close historical examination, ...

  19. RoadRunner: Infrastructure-less vehicular congestion control

    E-Print Network [OSTI]

    Gao, Jason Hao

    RoadRunner is an in-vehicle app for traffic congestion control without costly roadside infrastructure, instead judiciously harnessing vehicle-to-vehicle communications, cellular connectivity, and onboard computation and ...

  20. SACHIN SHETTY 148 Glen Hedge Road, Mantua, NJ 08051

    E-Print Network [OSTI]

    Shetty,Sachin

    SACHIN SHETTY 148 Glen Hedge Road, Mantua, NJ 08051 Office Phone: (856) 256-5379 Cell Phone: (757 to characterize the electromagnetic interference and radiation environments. ­ Sensor Web: Implemented a se

  1. Predicting and Utilizing the Vehicle's Past and Futuer Road Grade

    Broader source: Energy.gov [DOE]

    Predicted road grade may be used to estimate the power required to propel the vehicle through the upcoming terrain so that the engine controller can deliver the necessary power.

  2. The Road to SDN: An Intellectual History of Programmable Networks

    E-Print Network [OSTI]

    Rexford, Jennifer

    The Road to SDN: An Intellectual History of Programmable Networks Nick Feamster Jennifer Rexford virtualization [54,67], energy- efficient networking [42], and seamless virtual-machine migration and user

  3. An Ising Model for Road Traffic Cyril Furtlehner

    E-Print Network [OSTI]

    Furtlehner, Cyril

    Chapter 1 An Ising Model for Road Traffic Inference Cyril Furtlehner Abstract We review some, as a minimizer of a Bethe free energy [32], a solver of the cavity equations [21] and its relation to the TAP

  4. Trends in on-road vehicle emissions of ammonia

    E-Print Network [OSTI]

    Kean, A.J.

    2009-01-01

    Gasoline on Motor Vehicle Emissions: Mass Emission Rates.Trends in On-Road Vehicle Emissions of Ammonia A.J. Kean 1 ,94720 Abstract Motor vehicle emissions of ammonia have been

  5. Road Transportable Analytical Laboratory system. Phase 1

    SciTech Connect (OSTI)

    Finger, S.M.; Keith, V.F.; Spertzel, R.O.; De Avila, J.C.; O`Donnell, M.; Vann, R.L.

    1993-09-01

    This developmental effort clearly shows that a Road Transportable Analytical Laboratory System is a worthwhile and achievable goal. The RTAL is designed to fully analyze (radioanalytes, and organic and inorganic chemical analytes) 20 samples per day at the highest levels of quality assurance and quality control. It dramatically reduces the turnaround time for environmental sample analysis from 45 days (at a central commercial laboratory) to 1 day. At the same time each RTAL system will save the DOE over $12 million per year in sample analysis costs compared to the costs at a central commercial laboratory. If RTAL systems were used at the eight largest DOE facilities (at Hanford, Savannah River, Fernald, Oak Ridge, Idaho, Rocky Flats, Los Alamos, and the Nevada Test Site), the annual savings would be $96,589,000. The DOE`s internal study of sample analysis needs projects 130,000 environmental samples requiring analysis in FY 1994, clearly supporting the need for the RTAL system. The cost and time savings achievable with the RTAL system will accelerate and improve the efficiency of cleanup and remediation operations throughout the DOE complex.

  6. Runoff sources and land cover change in the Amazon: an end-member mixing analysis from small watersheds

    E-Print Network [OSTI]

    of Georgia, Athens, GA 30602, USA M. C. Piccolo Laborato´rio Ciclagem de Nutrients, Centro de Energia Nuclear

  7. AlGaAsSb/GaSb Distributed Bragg Reflectors Grown by Organometallic Vapor Phase Epitaxy

    SciTech Connect (OSTI)

    C.A. Wang; C.J. Vineis; D.R. Calawa

    2002-02-13

    The first AlGaAsSb/GaSb quarter-wave distributed Bragg reflectors grown by metallic vapor phase epitaxy are reported. The peak reflectance is 96% for a 10-period structure.

  8. Impact of electrochemical process on the degradation mechanisms of AlGaN/GaN HEMTs

    E-Print Network [OSTI]

    Gao, Feng, Ph. D. Massachusetts Institute of Technology

    2014-01-01

    AlGaN/GaN high electron mobility transistors (HEMTs) constitute a new generation of transistors with excellent electrical characteristics and great potential to replace silicon technology in the future, especially in high ...

  9. GaN nanowires show more 3D piezoelectricity than bulk GaN

    E-Print Network [OSTI]

    Espinosa, Horacio D.

    director cds murder nudity soundtrack BBC movie releases footage worth documentary film Blu-rays Blu-ray Ga

  10. GaInP/GaAs/GaInAs Monolithic Tandem Cells for High-Performance Solar Concentrators

    SciTech Connect (OSTI)

    Wanlass, M. W.; Ahrenkiel, S. P.; Albin, D. S.; Carapella, J. J.; Duda, A.; Emery, K.; Geisz, J. F.; Jones, K.; Kurtz, S.; Moriarty, T.; Romero, M. J.

    2005-08-01

    We present a new approach for ultra-high-performance tandem solar cells that involves inverted epitaxial growth and ultra-thin device processing. The additional degree of freedom afforded by the inverted design allows the monolithic integration of high-, and medium-bandgap, lattice-matched (LM) subcell materials with lower-bandgap, lattice-mismatched (LMM) materials in a tandem structure through the use of transparent compositionally graded layers. The current work concerns an inverted, series-connected, triple-bandgap, GaInP (LM, 1.87 eV)/GaAs (LM, 1.42 eV)/GaInAs (LMM, {approx}1 eV) device structure grown on a GaAs substrate. Ultra-thin tandem devices are fabricated by mounting the epiwafers to pre-metallized Si wafer handles and selectively removing the parent GaAs substrate. The resulting handle-mounted, ultra-thin tandem cells have a number of important advantages, including improved performance and potential reclamation/reuse of the parent substrate for epitaxial growth. Additionally, realistic performance modeling calculations suggest that terrestrial concentrator efficiencies in the range of 40-45% are possible with this new tandem cell approach. A laboratory-scale (0.24 cm2), prototype GaInP/GaAs/GaInAs tandem cell with a terrestrial concentrator efficiency of 37.9% at a low concentration ratio (10.1 suns) is described, which surpasses the previous world efficiency record of 37.3%.

  11. Spontaneous emission in GaN/InGaN photonic crystal nanopillars

    E-Print Network [OSTI]

    Boyer, Edmond

    . Sigalas, "InGaN/GaN quantum-well heterostructure light-emitting diodes employing photonic crystal, "III-nitride blue and ultraviolet photonic crystal light emitting diodes," Appl. Phys. Lett. 84, 466, and H. Benisty, "Photonic-crystal GaN light-emitting diodes with tailored guided modes distribution

  12. Switchable piezoelectric transduction in AlGaN/GaN MEMS resonators

    E-Print Network [OSTI]

    Weinstein, Dana

    This work presents a new switching mechanism in piezoelectric transduction of AlGaN/GaN bulk acoustic resonators. A piezoelectric transducer is formed in the AlGaN, between a top Schottky electrode and a 2D electron gas ...

  13. Scientific Achievement Networks of highly photoresponsive crystalline GaSe

    E-Print Network [OSTI]

    Geohegan, David B.

    Scientific Achievement Networks of highly photoresponsive crystalline GaSe nanosheets a crystalline GaSe target was adjusted to directly grow networks of interconnected triangular GaSe crystalline nanosheets of ~ 200 nm size (inset shows atomic

  14. Roads and cities of $18^{th}$ century France

    E-Print Network [OSTI]

    Perret, Julien; Barthelemy, Marc

    2015-01-01

    The evolution of infrastructure networks such as roads and streets are of utmost importance to understand the evolution of urban systems. However, datasets describing these spatial objects are rare and sparse. The database presented here represents the road network at the french national level described in the historical map of Cassini in the $18^{th}$ century. The digitization of this historical map is based on a collaborative methodology that we describe in detail. This dataset can be used for a variety of interdisciplinary studies, covering multiple spatial resolutions and ranging from history, geography, urban economics to network science.

  15. Development of metallization for GaAs and AlGaAs concentrator solar cells

    SciTech Connect (OSTI)

    Tobin, S.P.

    1987-04-01

    A three-layer metallization system was developed for high temperature stability on GaAs and AlGaAs solar cells. The layers are a Pt ohmic contact metal that forms thermally stable compounds with GaAs, a TiN diffusion barrier, and a gold conductor. The solar cell structure was also designed for contact stability, with the key component being a heavily doped GaAs cap layer. Reactively sputtered TiN was found to act as an excellent barrier when deposited under the proper conditions. The conditions were carefully optimized for low resistivity and low stress in the films. A low but nonzero substrate bias during sputtering was found to be important. Solar cells with sputtered metallizations of Pt/TiN/Ti/Pt/Au were found to be thermally stable up to 500/sup 0/C for 15 minutes in vacuum. At 600/sup 0/C there was catastrophic degradation of the cells due to dissociation of uncapped GaAs surfaces. Below this temperature the metallization performed as designed. The Pt and GaAs layers reacted to form a stable PtGa compound layer that gave low contact resistance. There was no penetration of Au or GaAs through the barrier layer. These results are a very encouraging first step leading to stable, reliable GaAs and AlGaAs concentrator cells.

  16. Structural and optical properties of InGaN–GaN nanowire heterostructures grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Limbach, F.; Gotschke, T.; Stoica, T.; Calarco, R.; Sutter, E.; Ciston, J.; Cusco, R.; Artus, L.; Kremling, S.; Ho?fling, S.; Worschech, L.; Gru?tzmacher, D.

    2011-01-01

    InGaN/GaN nanowire (NW) heterostructures grown by plasma assisted molecular beam epitaxy were studied in comparison to their GaN and InGaN counterparts. The InGaN/GaN heterostructure NWs are composed of a GaN NW, a thin InGaN shell, and a multifaceted InGaN cap wrapping the top part of the GaN NW. High-resolution transmission electron microscopy (HRTEM) images taken from different parts of a InGaN/GaN NW show a wurtzite structure of the GaN core and the epitaxial InGaN shell around it, while additional crystallographic domains are observed whithin the InGaN cap region. Large changes in the lattice parameter along the wire, from pure GaN to higher In concentration demonstrate the successful growth of a complex InGaN/GaN NW heterostructure. Photoluminescence (PL) spectra of these heterostructure NW ensembles show rather broad and intense emission peak at 2.1 eV. However, ?-PL spectra measured on single NWs reveal a reduced broadening of the visible luminescence. The analysis of the longitudinal optical phonon Raman peak position and its shape reveal a variation in the In content between 20% and 30%, in agreement with the values estimated by PL and HRTEM investigations. The reported studies are important for understanding of the growth and properties of NW heterostructures suitable for applications in optoelectronics and photovoltaics.

  17. All roads lead to Newton: Feasible second-order methods for ...

    E-Print Network [OSTI]

    2009-08-31

    Aug 31, 2009 ... The reason for the title, “All roads lead to Newton”, is that this paper extends and ... per saecula Romam” or “a thousand roads lead men forever.

  18. Timber Management: Road and Stream Crossing BMPs http://tfsweb.tamu.edu Page 1 of 2

    E-Print Network [OSTI]

    and frequency. Some crossings are designed specifically for skidding, some for truck and vehicular traffic only- bars and wing ditches (waterbars are better suited for temporary roads or roads with light traffic

  19. The Development and On-Road Performance and Durability of the...

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

    The Development and On-Road Performance and Durability of the Four-Way Emission Control SCRTTM System The Development and On-Road Performance and Durability of the Four-Way...

  20. Cleaning Up Non-Road Diesel Vehicles: A Public Health Imperative...

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

    of Concerned Scientists 2002deermonahan.pdf More Documents & Publications EPA Diesel Update A View From The Bridge Commonalities between Non-road and On-road Diesel Emissions...

  1. The walled city : Beijing hybrid development plan in the 2nd ring road

    E-Print Network [OSTI]

    Liang, Shaoyi

    2014-01-01

    The circular ring roads are one of the key elements that define the spatial organization of Beijing today. However, as the city continues to expand, the ring roads located in the inner city, combined with the gridded ...

  2. Biofuel Facts for the Road: The Energy Department and Your Gasoline...

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

    Biofuel Facts for the Road: The Energy Department and Your Gasoline Pump Biofuel Facts for the Road: The Energy Department and Your Gasoline Pump December 18, 2014 - 2:08pm Addthis...

  3. An empirical study of planning and scheduling interactions in the road passenger transportation domain

    E-Print Network [OSTI]

    Qu, Rong

    An empirical study of planning and scheduling interactions in the road passenger transportation between planning and scheduling in a specific scenario, road pas- senger transportation. The problem (what planning analyzes). The relative change consists of slightingly decreasing the energy level

  4. Ohmic contacts to n-GaSb 

    E-Print Network [OSTI]

    Yang, Zhengchong

    1997-01-01

    In recent years, the Ill-V semiconductor GaSb and its ternary alloys containing antimony have exhibited interesting electrical and optical properties for device applications which include negative resistance tunnel devices, lasers, detectors and FET...

  5. GaTe semiconductor for radiation detection

    DOE Patents [OSTI]

    Payne, Stephen A. (Castro Valley, CA); Burger, Arnold (Nashville, TN); Mandal, Krishna C. (Ashland, MA)

    2009-06-23

    GaTe semiconductor is used as a room-temperature radiation detector. GaTe has useful properties for radiation detectors: ideal bandgap, favorable mobilities, low melting point (no evaporation), non-hygroscopic nature, and availability of high-purity starting materials. The detector can be used, e.g., for detection of illicit nuclear weapons and radiological dispersed devices at ports of entry, in cities, and off shore and for determination of medical isotopes present in a patient.

  6. FOR341 Timber Harvesting and Forest Roads Spring 2009

    E-Print Network [OSTI]

    Vonessen, Nikolaus

    FOR341 Timber Harvesting and Forest Roads Spring 2009 Instructor: Beth Dodson Office: FOR 201A Text: Water Quality BMPs (Best Management Practices) for Montana Forests Other readings as assigned (available in class folder: R:\\Classes\\Spring2009\\FOR341) Course Description: An overview of harvesting

  7. Story Road Landfill Solar Site Evaluation: San Jose

    Broader source: Energy.gov [DOE]

    This report describes the findings of a solar site evaluation conducted at the Story Road Landfill (Site) in the City of San Jose, California (City). This evaluation was conducted as part of a larger study to assess solar potential at multiple public facilities within the City.

  8. An Integrated Measurement to Road Vibration Simulation System

    E-Print Network [OSTI]

    Birdsong, Charles

    An Integrated Measurement to Road Vibration Simulation System Charles Birdsong, Ph.D. Dactron Inc and replication of vibrations for product testing. Important issues such as data verification, compensation for vibrations measured on a Jeep, compensated, and replicated on an electrodynamic shaker. Introduction

  9. Autonomous Off-Road Driving in the DARPA Grand Challenge

    E-Print Network [OSTI]

    Soatto, Stefano

    Frazzoli Henry Samueli School of Engineering and Applied Science University of California, Los Angeles Los a 150 mile off-road course in the desert in under 10 hours. The event was described as "a field test over 6 kph. B. Vehicle Our vehicle was a standard heavy duty pickup truck. We in- stalled actuators

  10. Road to Smart MobilityWorkshop You're Invited!

    E-Print Network [OSTI]

    Bertini, Robert L.

    Road to Smart MobilityWorkshop You're Invited! Join a cross section of transportation professionals and Continental Breakfast 9:45 am-Welcome 10:00 am- Smart Mobility 101 · Mark Hallenbeck, Director, TRAC:00 pm- Role of the Public and Private Sector in Smart Mobility · Paige Fitzgerald, Connected Citizens

  11. Strategic Plan Road Map & Timeline: Next Steps April 16, 2014

    E-Print Network [OSTI]

    Saldin, Dilano

    Strategic Plan Road Map & Timeline: Next Steps April 16, 2014 December 11, 2013 Strategic, 2014 Strategic Planning Core Team meeting cancelled January 910, 2122, 2014 Review team meets Expanded Strategic Planning Core Team meeting: Top objectives shared March 20, 2014 Thematic teams

  12. UNIVERSITY OF FLORIDA POLICE DEPT BUILDING 51, MUSEUM ROAD

    E-Print Network [OSTI]

    Sin, Peter

    UNIVERSITY OF FLORIDA POLICE DEPT BUILDING 51, MUSEUM ROAD GAINESVILLE, FL 32611-2150 352 City GAINESVILLE State FL Zip Code 32611 Business Name UF PAYROLL & TAX SERVICES Phone Number 352. Per DeBose, The UF Finance and Accounting Office of Payroll and Tax Services mistakenly sent out

  13. Office of Scholarships & Financial Aid 601 S. College Road

    E-Print Network [OSTI]

    Olszewski Jr., Edward A.

    Office of Scholarships & Financial Aid 601 S. College Road Wilmington NC 28403-5951 910: ___________________ Student's First Name: ___________________ Non-Tax Filer Worksheet ­ 2014 Tax Year Your 2015-2016 Free a 2014 U.S. federal tax return. You must attach copies of all W-2 form(s) and/or 1099 form(s) received

  14. RV 01/29/2015 5200 N. Lake Road

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    DPDSK_1516 RV 01/29/2015 5200 N. Lake Road Merced, CA 95343 Phone 209-228-7178 Fax 209-228-7861 E · Provide a completed copy of your 2014 Federal Tax Transcript if not already submitted AND · Provide

  15. RV 01/29/2015 5200 N. Lake Road

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    PDSWK_1516 RV 01/29/2015 5200 N. Lake Road Merced, CA 95343 Phone 209-228-7178 Fax 209-228-7861 E of Unemployment Benefits (if applicable) and effective dates · Provide a completed copy of your 2014 Federal Tax

  16. DDSWK2_1415 5200 N. Lake Road

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    DDSWK2_1415 RV 9/30/14 5200 N. Lake Road Merced, CA 95343 Phone 209-228-7178 Fax 209-228-7861 E (if applicable) and effective dates · Provide a complete copy of your 2013 Federal Tax Transcript

  17. Division of Graduate Studies 5200 N. Lake Road

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    Division of Graduate Studies 5200 N. Lake Road Merced, CA 95343 Phone: (209) 228-4723 Fax: (209 Officer. Fee Waiver Option 3: Household Income US federal tax return for the 2014 calendar year attached. My filing status is Dependent (listed on parents' tax return) Independent (filing my own tax return

  18. Road to Recovery: Bringing Recovery to Small Town America

    ScienceCinema (OSTI)

    Nettamo, Paivi

    2012-06-14

    The Recovery Act hits the road to reach out to surrounding towns of the Savannah River Site that are struggling with soaring unemployment rates. This project helps recruit thousands of people to new jobs in environmental cleanup at the Savannah River Site.

  19. 901 San Antonio Road Palo Alto, CA 94303 USA

    E-Print Network [OSTI]

    Fischer, Charles N.

    901 San Antonio Road Palo Alto, CA 94303 USA 800 681­8845 http://www.sun.com/microelectronics UltraSPARC ^TM IIi User's Manual Part No.: 805­0087­02 Sun Microelectronics #12; Copyright © 1999 Sun ANY EXPRESS REPRESENTATIONS OR WARRANTIES. IN ADDITION, SUN MICROSYSTEMS, INC. DISCLAIMS ALL IMPLIED

  20. A HISTORY OF ON-ROAD EMISSIONS AND EMISSIONS DETERIORATION

    E-Print Network [OSTI]

    Denver, University of

    emissions relative to the newer. · Why? IM240 is registration based, every old car is supposed to be testedA HISTORY OF ON-ROAD EMISSIONS AND EMISSIONS DETERIORATION www.feat.biochem.du.edu www of Denver 2101 E. Wesley Ave. Denver, CO 80208 303 871-2580.. FAX 2587 dstedman@du.edu #12;Emissions

  1. On-Road Emission Measurements of Reactive Nitrogen Compounds from

    E-Print Network [OSTI]

    Denver, University of

    - equippedvehiclesarenotbelievedtobesignificant(1).Oxides of nitrogen (NOx) emission rates from light-duty gasoline vehicles have been shown to be rapidly decreasing across the United States, but total NOx emissions are decreasing at a slower rate dueOn-Road Emission Measurements of Reactive Nitrogen Compounds from Three California Cities G A R Y

  2. Considering Climate Change in Road and Building Design

    E-Print Network [OSTI]

    - time maximum 3-second wind speed. Cur- rent climate models do not generate this informationConsidering Climate Change in Road and Building Design First Infrastructure and Climate Network in infrastruc- ture design? How can engineers design for a changing climate? How can climate scien- tists better

  3. Road to Discovery Blog Riding for the Lives of Children

    E-Print Network [OSTI]

    Buechler, Steven

    #12;BOSTON 6.13.11 DALLAS 7.8.11 Road to Discovery Blog Riding for the Lives of Children 2 for us. " " #12;day 1W e had the perfect day today! The weather was a bit chilly at first departed from Ara Parseghian's home in the Boston area. Ara is the grandson of Coach Ara Parseghian, one

  4. Road to Inertial Fusion Energy Fusion Power Associates Meeting

    E-Print Network [OSTI]

    . Crack is clear through 5 mm thick deck plate #12;Coal-fired and KrF laser fusion power power plants have-electron-beams-nrl-to-clean-up- nox-emissions-from-coal-power-plant NRL has a Cooperative Research and Development AgreementRoad to Inertial Fusion Energy Fusion Power Associates Meeting Washington DC 16 December 2014

  5. Energy Change Institute Cockcroft Building 58, Mills Road

    E-Print Network [OSTI]

    course has been provided ­ "Energy Change in a Carbon Trading World". The range of educational offeringsEnergy Change Institute Cockcroft Building 58, Mills Road Canberra ACT 0200 Australia T 02 6125 4702 (direct) T 02 6125 0633 (administrator) F 02 6125 2452 E energy.change@anu.edu.au W www.energy

  6. HCEI Road Map and Introduction and Overview 2011

    Office of Energy Efficiency and Renewable Energy (EERE)

    This road map is a summary of the 2011 key goals and strategies of the Hawaii Clean Energy Initiative, which was founded based on a Memorandum of Understanding between the State of Hawaii and the U.S. Department of Energy in 2008.

  7. MILESTONES ON THE ROAD TO CLIMATE SCIENCE Eugene Rasmusson

    E-Print Network [OSTI]

    Zeng, Ning

    1 MILESTONES ON THE ROAD TO CLIMATE SCIENCE Eugene Rasmusson THANK YOU! This has been a great day-laws said the same thing. I think my contributions to climate science are appropriately described by a 12th." However, the seeds of a new and broadened climate perspective could be found in the reviews of several

  8. MILESTONES ON THE ROAD TO CLIMATE SCIENCE Eugene Rasmusson

    E-Print Network [OSTI]

    Nigam, Sumant

    1 MILESTONES ON THE ROAD TO CLIMATE SCIENCE Eugene Rasmusson THANK YOU! This has been a great day-laws said the same thing. I think my contributions to climate science are appropriately described by a 12th of a new and broadened climate perspective could be found in the reviews of several other specialties

  9. YACOUBA MOUMOUNI 939 E. FLAMINGO ROAD APT#29

    E-Print Network [OSTI]

    Baker, R. Jacob

    1 YACOUBA MOUMOUNI 939 E. FLAMINGO ROAD APT#29 LAS VEGAS, NEVADA 89119 USA E-mail: yacoubam de Nevada, USA Option : Energie/Energie Renouvelable (Solaire) Masters (MS) Génie Mécanique, Mai 2012 Université de Nevada, USA Option : Fluide et Thermosciences/ Energie Solaire These : Mise En

  10. The Northern Highlands: Where does the road lead?

    E-Print Network [OSTI]

    The Northern Highlands: Where does the road lead? Steve Carpenter Professor Center for Limnology the Northern Highland: Climate Population Economy Resilience . . . Living resources, land and lakes Creativity, energy of Northern Highland people (comments from March workshop) #12;Are there obstacles to innovation

  11. Fuel-Based On-Road Motor Vehicle Emissions Inventory

    E-Print Network [OSTI]

    Denver, University of

    Fuel-Based On-Road Motor Vehicle Emissions Inventory for the Denver Metropolitan Area Sajal S -legally correct but ... Measured grams pollutant per kg of fuel from RSD -quantifiable uncertainty Fuel sales from tax department -quite precise Inventory -uncertainty can be estimated Travel Based Model Fuel

  12. Multicriteria decision analysis applied to the evaluation of road projects at the

    E-Print Network [OSTI]

    Libre de Bruxelles, Université

    Multicriteria decision analysis applied to the evaluation of road projects at the design stage in this publication. #12;Multicriteria decision analysis applied to the evaluation of road projects at the design evaluation of road projects in a sustainable development perspective" English version Title: Multicriteria

  13. Highway 280 North or South Take the Sand Hill Road exit, head east

    E-Print Network [OSTI]

    Ford, James

    Highway 280 North or South · Take the Sand Hill Road exit, head east · Turn right on Stock Farm for "all" below From Bayshore US Highway 101 NorthFrom Bayshore US Highway 101 North or South · Take · Turn left on Stock Farm Road LKSC ParkingTurn left on Stock Farm Road · Make the next lefthand turn

  14. From GPS Traces to a Routable Road Map Department of Computer Science

    E-Print Network [OSTI]

    Krumm, John

    pulls together traces that belong on the same road in response to simulated potential energy wellsFrom GPS Traces to a Routable Road Map Lili Cao Department of Computer Science University presents a method for automatically converting raw GPS traces from everyday vehicles into a routable road

  15. IEEE TRANSACTIONS ON MOBILE COMPUTING 1 Road Network-Aware Spatial Alarms

    E-Print Network [OSTI]

    Liu, Ling

    IEEE TRANSACTIONS ON MOBILE COMPUTING 1 Road Network-Aware Spatial Alarms Kisung Lee, Ling Liu, Balaji Palanisamy, and Emre Yigitoglu Abstract--Road network-aware spatial alarms extend the concept of time-based alarms to spatial dimension and remind us when we travel on spatially constrained road

  16. Forecasting Spatiotemporal Impact of Traffic Incidents on Road Networks Bei Pan, Ugur Demiryurek, Cyrus Shahabi

    E-Print Network [OSTI]

    Shahabi, Cyrus

    Forecasting Spatiotemporal Impact of Traffic Incidents on Road Networks Bei Pan, Ugur Demiryurek and quantifying the impact of traffic incidents. Traffic incidents include any non-recurring events on road networks, including accidents, weather hazard, road construction or work zone closures. By analyzing

  17. Seljuk Muqarnas along the Silk Road Harmsen, Silvia and Jungblut, Daniel and Krmker, Susanne

    E-Print Network [OSTI]

    Gertz, Michael

    Seljuk Muqarnas along the Silk Road Harmsen, Silvia and Jungblut, Daniel and Krömker, Susanne URL.ub.uni-heidelberg.de/volltextserver/help/license_pod.html #12;Seljuk Muqarnas along the Silk Road Silvia Harmsen, Daniel Jungblut, Susanne Kr¨omker September 2007 Abstract The film Seljuk Muqarnas along the Silk Road gives an overview of muqarnas, stalactite

  18. Public Perceptions of Toll Roads: A Survey of the Texas Perspective

    E-Print Network [OSTI]

    Kockelman, Kara M.

    Public Perceptions of Toll Roads: A Survey of the Texas Perspective By Kaethe V. Podgorski Graduate 70% agreed on attending to existing roads first, keeping existing roads toll-free, reducing tolls. However, because these taxes have not been tied to inflation and improved vehicle fuel efficiencies have

  19. IDENTIFYING DIFFERENCES IN WET AND DRY ROAD CRASHES USING DATA MINING Emerson D a

    E-Print Network [OSTI]

    Liang, Huizhi "Elly"

    ]. These criteria aim to develop roads that sustain set maximum traffic volumes at certain traffic speeds with low1 IDENTIFYING DIFFERENCES IN WET AND DRY ROAD CRASHES USING DATA MINING Emerson D a , Nayak R, Queensland University of Technology, Brisbane, Queensland, Australia. b. Road Asset Management Branch

  20. GPS World | July 2011 www.gpsworld.com28 TRANSPORTATION | Road and Marine

    E-Print Network [OSTI]

    Stanford University

    GPS World | July 2011 www.gpsworld.com28 TRANSPORTATION | Road and Marine B Moving, Stanford University IntegrityforNon-AviationUsers #12;Road and Marine | TRANSPORTATION www TRANSPORTATION | Road and Marine www.gpsworld.com/ specific_risk FIGURE 2 Fault tree for CAT I GBAS integrity

  1. Downtown Athens DWBrooksMall

    E-Print Network [OSTI]

    Arnold, Jonathan

    STATION RD Rivers Crossing University Health Center CAES Activity Center Visitors Center (Four Towers

  2. InGaN/GaN tunnel junctions for hole injection in GaN light emitting diodes

    SciTech Connect (OSTI)

    Krishnamoorthy, Sriram, E-mail: krishnamoorthy.13@osu.edu, E-mail: rajan@ece.osu.edu; Akyol, Fatih [Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210 (United States); Rajan, Siddharth, E-mail: krishnamoorthy.13@osu.edu, E-mail: rajan@ece.osu.edu [Department of Electrical and Computer Engineering, The Ohio State University, Columbus, Ohio 43210 (United States); Department of Materials Science and Engineering, The Ohio State University, Columbus, Ohio 43210 (United States)

    2014-10-06

    InGaN/GaN tunnel junction contacts were grown using plasma assisted molecular beam epitaxy (MBE) on top of a metal-organic chemical vapor deposition (MOCVD)-grown InGaN/GaN blue (450?nm) light emitting diode. A voltage drop of 5.3?V at 100?mA, forward resistance of 2 × 10{sup ?2} ? cm{sup 2}, and a higher light output power compared to the reference light emitting diodes (LED) with semi-transparent p-contacts were measured in the tunnel junction LED (TJLED). A forward resistance of 5?×?10{sup ?4} ? cm{sup 2} was measured in a GaN PN junction with the identical tunnel junction contact as the TJLED, grown completely by MBE. The depletion region due to the impurities at the regrowth interface between the MBE tunnel junction and the MOCVD-grown LED was hence found to limit the forward resistance measured in the TJLED.

  3. Journal of Crystal Growth 298 (2007) 272275 Dislocation analysis in homoepitaxial GaInN/GaN light emitting

    E-Print Network [OSTI]

    Wetzel, Christian M.

    2007-01-01

    of GaInN/GaN-based light emitting diodes (LED) on quasi-bulk GaN with an atomically flat polished were much improved. The optical output power of the light emitting diode increased by more than one. Cathodoluminescence; A1. Threading dislocation density; A2. Homoepitaxial growth; B1. GaInN; B3. Light emitting diode

  4. Thermoelectric effects in wurtzite GaN and AlxGa1-xN alloys and Alexander A. Balandin

    E-Print Network [OSTI]

    Thermoelectric effects in wurtzite GaN and AlxGa1-xN alloys Weili Liua and Alexander A. Balandin have investigated theoretically the thermoelectric effects in wurtzite GaN crystals and AlxGa1-xN-based alloys may have some potential as thermoelectric materials at high temperature. It was found

  5. Ultra-high frequency photoconductivity decay in GaAs/Ge/GaAs double heterostructure grown by molecular beam epitaxy

    SciTech Connect (OSTI)

    Hudait, M. K.; Zhu, Y. [Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)] [Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States); Johnston, S. W. [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States)] [National Renewable Energy Laboratory, Golden, Colorado 80401 (United States); Maurya, D.; Priya, S. [Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061 (United States)] [Center for Energy Harvesting Materials and Systems (CEHMS), Virginia Tech, Blacksburg, Virginia 24061 (United States); Umbel, R. [Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)] [Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061 (United States)

    2013-03-04

    GaAs/Ge/GaAs double heterostructures (DHs) were grown in-situ using two separate molecular beam epitaxy chambers. High-resolution x-ray rocking curve demonstrates a high-quality GaAs/Ge/GaAs heterostructure by observing Pendelloesung oscillations. The kinetics of the carrier recombination in Ge/GaAs DHs were investigated using photoconductivity decay measurements by the incidence excitation from the front and back side of 15 nm GaAs/100 nm Ge/0.5 {mu}m GaAs/(100)GaAs substrate structure. High-minority carrier lifetimes of 1.06-1.17 {mu}s were measured when excited from the front or from the back of the Ge epitaxial layer, suggests equivalent interface quality of GaAs/Ge and Ge/GaAs. Wavelength-dependent minority carrier recombination properties are explained by the wavelength-dependent absorption coefficient of Ge.

  6. Located between Snyder Hill Road and Ellis Hollow Road, this precinct is at the periphery of the main campus and is home to the research facilities used by the College of Veterinary

    E-Print Network [OSTI]

    Chen, Tsuhan

    205 Located between Snyder Hill Road and Ellis Hollow Road, this precinct is at the periphery a defined spine running north to south along Hungerford road. The Baker Laboratory and its support buildings end of Hungerford Road looking west to the core campus should be preserved. The forested area

  7. Green cubic GaInN/GaN light-emitting diode on microstructured silicon (100)

    SciTech Connect (OSTI)

    Stark, Christoph J. M.; Detchprohm, Theeradetch; Wetzel, Christian, E-mail: wetzel@ieee.org [Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States) [Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States); Future Chips Constellation, Rensselaer Polytechnic Institute, 110 8th Street, Troy, New York 12180 (United States); Lee, S. C.; Brueck, S. R. J. [Department of Electrical and Computer Engineering and Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico 87106 (United States)] [Department of Electrical and Computer Engineering and Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico 87106 (United States); Jiang, Y.-B. [Department of Earth and Planetary Science, University of New Mexico, Albuquerque, New Mexico 87131 (United States)] [Department of Earth and Planetary Science, University of New Mexico, Albuquerque, New Mexico 87131 (United States)

    2013-12-02

    GaInN/GaN light-emitting diodes free of piezoelectric polarization were prepared on standard electronic-grade Si(100) substrates. Micro-stripes of GaN and GaInN/GaN quantum wells in the cubic crystal structure were grown on intersecting (111) planes of microscale V-grooved Si in metal-organic vapor phase epitaxy, covering over 50% of the wafer surface area. Crystal phases were identified in electron back-scattering diffraction. A cross-sectional analysis reveals a cubic structure virtually free of line defects. Electroluminescence over 20 to 100??A is found fixed at 487?nm (peak), 516?nm (dominant). Such structures therefore should allow higher efficiency, wavelength-stable light emitters throughout the visible spectrum.

  8. A hole accelerator for InGaN/GaN light-emitting diodes

    SciTech Connect (OSTI)

    Zhang, Zi-Hui; Liu, Wei; Tan, Swee Tiam; Ji, Yun; Wang, Liancheng; Zhu, Binbin; Zhang, Yiping; Lu, Shunpeng; Zhang, Xueliang; Hasanov, Namig; Sun, Xiao Wei, E-mail: EXWSUN@ntu.edu.sg, E-mail: VOLKAN@stanfordalumni.org [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Demir, Hilmi Volkan, E-mail: EXWSUN@ntu.edu.sg, E-mail: VOLKAN@stanfordalumni.org [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 (Singapore); Department of Electrical and Electronics, Department of Physics, and UNAM-Institute of Material Science and Nanotechnology, Bilkent University, TR-06800 Ankara (Turkey)

    2014-10-13

    The quantum efficiency of InGaN/GaN light-emitting diodes (LEDs) has been significantly limited by the insufficient hole injection, and this is caused by the inefficient p-type doping and the low hole mobility. The low hole mobility makes the holes less energetic, which hinders the hole injection into the multiple quantum wells (MQWs) especially when a p-type AlGaN electron blocking layer (EBL) is adopted. In this work, we report a hole accelerator to accelerate the holes so that the holes can obtain adequate kinetic energy, travel across the p-type EBL, and then enter the MQWs more efficiently and smoothly. In addition to the numerical study, the effectiveness of the hole accelerator is experimentally shown through achieving improved optical output power and reduced efficiency droop for the proposed InGaN/GaN LED.

  9. Gallium surface diffusion on GaAs (001) surfaces measured by crystallization dynamics of Ga droplets

    SciTech Connect (OSTI)

    Bietti, Sergio, E-mail: sergio.bietti@mater.unimib.it; Somaschini, Claudio; Esposito, Luca; Sanguinetti, Stefano [L–NESS and Dipartimento di Scienza dei Materiali, Università di Milano Bicocca, Via Cozzi 55, I–20125 Milano (Italy); Fedorov, Alexey [L–NESS and CNR–IFN, via Anzani 42, I-22100 Como (Italy)

    2014-09-21

    We present accurate measurements of Ga cation surface diffusion on GaAs surfaces. The measurement method relies on atomic force microscopy measurement of the morphology of nano–disks that evolve, under group V supply, from nanoscale group III droplets, earlier deposited on the substrate surface. The dependence of the radius of such nano-droplets on crystallization conditions gives direct access to Ga diffusion length. We found an activation energy for Ga on GaAs(001) diffusion E{sub A}=1.31±0.15 eV, a diffusivity prefactor of D?=0.53(×2.1±1) cm² s?¹ that we compare with the values present in literature. The obtained results permit to better understand the fundamental physics governing the motion of group III ad–atoms on III–V crystal surfaces and the fabrication of designable nanostructures.

  10. Location Privacy with Road network Mix-zones Balaji Palanisamy, Ling Liu, Kisung Lee, Aameek Singh and Yuzhe Tang

    E-Print Network [OSTI]

    Liu, Ling

    Location Privacy with Road network Mix-zones Balaji Palanisamy, Ling Liu, Kisung Lee, Aameek Singh attacks that make mix-zones on road networks vulnerable and illustrate a set of counter measures to make road network mix-zones attack resilient. Concretely, we categorize the vulnerabilities of road network

  11. Adapt-Traf: An adaptive multiagent road traffic management system based on hybrid ant-hierarchical fuzzy model

    E-Print Network [OSTI]

    Casillas Barranquero, Jorge

    of the energy consumption, and others. Road traffic management consists on improving the traffic fluency on roadAdapt-Traf: An adaptive multiagent road traffic management system based on hybrid ant systems Ant colony Hierarchical fuzzy system Traffic simulation a b s t r a c t Usually, road networks

  12. Godfrey Road, Florida: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History View New PagesSustainableGlynn County, Georgia: Energy Resources Jump to:Godfrey Road, Florida:

  13. HCEI Road Map: 2011 Edition (Brochure) | 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 on Delicious Rank EERE:FinancingPetroleum12,ExecutiveFinancing Programs |Reference Station DesignEnergy 0 DOEHCEI Road

  14. Road Tripping through the Geothermal Frontier | 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 on Delicious Rank EERE: Alternative FuelsofProgram: Report AppendicesA Token Requesting AQuestionsRevolving LoanRiskofRoad

  15. GaN: Defect and Device Issues

    SciTech Connect (OSTI)

    Pearton, S.J.; Ren, F.; Shul, R.J.; Zolper, J.C.

    1998-11-09

    The role of extended and point defects, and key impurities such as C, O and H, on the electrical and optical properties of GaN is reviewed. Recent progress in the development of high reliability contacts, thermal processing, dry and wet etching techniques, implantation doping and isolation and gate insulator technology is detailed. Finally, the performance of GaN-based electronic and photonic devices such as field effect transistors, UV detectors, laser diodes and light-emitting diodes is covered, along with the influence of process-induced or grown-in defects and impurities on the device physics.

  16. Influence of pressure on photoluminescence and electroluminescence in GaN/InGaN/AlGaN quantum wells

    E-Print Network [OSTI]

    Weinstein, Benard.A.

    recently that the temperature shifts of the photo- and electroluminescence EL peak energies in Nichia greenV/GPa for the green and blue diodes, respectively. The observed pressure coefficients are much lower than those characteristic of the energy gap in GaN ( 40 meV/GPa) or the energy gap in InN ( 33 meV/GPa). This kind

  17. Adapting to Change 475 Wildlife-Vehicle Collisions Data Collection PREDICTIVE MODELS OF HERPETOFAUNA ROAD MORTALITY HOTSPOTS IN EXTENSIVE ROAD NETWORKS

    E-Print Network [OSTI]

    Langen, Tom A.

    mortality risk and road-caused habitat fragmentation indicate that effective monitoring and mitigation- kill risk or critical corridors for habitat and population connectivity. While such models have already are expensive or labor-intensive, making them impractical to implement throughout a road network (see reviews

  18. A Fork in the Road We stand at a fork in the road. Conventional oil and gas supplies are limited. We can move

    E-Print Network [OSTI]

    Hansen, James E.

    A Fork in the Road We stand at a fork in the road. Conventional oil and gas supplies are limited the dirtiest tar sands and tar shales, hydrofracking for gas, continued mountain-top removal and mechanized change. Fossil fuel moguls get richer, we get poorer. Our children are screwed. Our well-oiled coal

  19. Cultural Resource Investigations for a Multipurpose Haul Road on the Idaho National Laboratory

    SciTech Connect (OSTI)

    Brenda R. Pace; Cameron Brizzee; Hollie Gilbert; Clayton Marler; Julie Braun Williams

    2010-08-01

    The U. S. Department of Energy, Idaho Operations Office is considering options for construction of a multipurpose haul road to transport materials and wastes between the Materials and Fuels Complex (MFC) and other Idaho National Laboratory (INL) Site facilities. The proposed road will be closed to the public and designed for limited year-round use. Two primary options are under consideration: a new route south of the existing T-25 power line road and an upgrade to road T-24. In the Spring of 2010, archaeological field surveys and initial coordination and field reconnaissance with representatives from the Shoshone-Bannock Tribes were completed to identify any resources that may be adversely affected by the proposed road construction and to develop recommendations to protect any listed or eligible for listing on the National Register of Historic Places. The investigations showed that 24 archaeological resources and one historic marker are located in the area of potential effects for road construction and operation south of the T-25 powerline road and 27archaeological resources are located in the area of potential effects for road construction and operation along road T-24. Generalized tribal concerns regarding protection of natural resources were also documented in both road corridors. This report outlines recommendations for additional investigations and protective measures that can be implemented to minimize adverse impacts to the identified resources.

  20. InGaAs/GaAs quantum dot interdiffiusion induced by cap layer overgrowth

    SciTech Connect (OSTI)

    Jasinski, J.; Babinski, A.; Czeczott, M.; Bozek, R.

    2000-06-28

    The effect of thermal treatment during and after growth of InGaAs/GaAs quantum dot (QD) structures was studied. Transmission electron microscopy and atomic force microscopy confirmed the presence of interacting QDs, as was expected from analysis of temperature dependence of QD photoluminescence (PL) peak. The results indicate that the effect of post-growth annealing can be similar to the effect of elevated temperature of capping layer growth. Both, these thermal treatments can lead to a similar In and Ga interdiffiusion resulting in a similar blue-shift of QD PL peak.

  1. Optical spectroscopy of quantum confined states in GaAs/AlGaAs quantum well tubes

    SciTech Connect (OSTI)

    Shi, Teng; Fickenscher, Melodie; Smith, Leigh; Jackson, Howard; Yarrison-Rice, Jan; Gao, Qiang; Tan, Hoe; Jagadish, Chennupati; Etheridge, Joanne; Wong, Bryan M.

    2013-12-04

    We have investigated the quantum confinement of electronic states in GaAs/Al{sub x}Ga{sub 1?x}As nanowire heterostructures which contain radial GaAs quantum wells of either 4nm or 8nm. Photoluminescence and photoluminescence excitation spectroscopy are performed on single nanowires. We observed emission and excitation of electron and hole confined states. Numerical calculations of the quantum confined states using the detailed structural information on the quantum well tubes show excellent agreement with these optical results.

  2. Structural and optical properties of InGaN–GaN nanowire heterostructures grown by molecular beam epitaxy

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

    Limbach, F.; Gotschke, T.; Stoica, T.; Calarco, R.; Sutter, E.; Ciston, J.; Cusco, R.; Artus, L.; Kremling, S.; Ho?fling, S.; et al

    2011-01-01

    InGaN/GaN nanowire (NW) heterostructures grown by plasma assisted molecular beam epitaxy were studied in comparison to their GaN and InGaN counterparts. The InGaN/GaN heterostructure NWs are composed of a GaN NW, a thin InGaN shell, and a multifaceted InGaN cap wrapping the top part of the GaN NW. High-resolution transmission electron microscopy (HRTEM) images taken from different parts of a InGaN/GaN NW show a wurtzite structure of the GaN core and the epitaxial InGaN shell around it, while additional crystallographic domains are observed whithin the InGaN cap region. Large changes in the lattice parameter along the wire, from pure GaNmore »to higher In concentration demonstrate the successful growth of a complex InGaN/GaN NW heterostructure. Photoluminescence (PL) spectra of these heterostructure NW ensembles show rather broad and intense emission peak at 2.1 eV. However, ?-PL spectra measured on single NWs reveal a reduced broadening of the visible luminescence. The analysis of the longitudinal optical phonon Raman peak position and its shape reveal a variation in the In content between 20% and 30%, in agreement with the values estimated by PL and HRTEM investigations. The reported studies are important for understanding of the growth and properties of NW heterostructures suitable for applications in optoelectronics and photovoltaics.« less

  3. IEEE Energy2030 Atlanta, GA USA

    E-Print Network [OSTI]

    Gross, George

    of an aggregation of battery vehicles for the provision of frequency regulation ­ requiring very fast response timesIEEE Energy2030 Atlanta, GA USA 17-18 November, 2008 Design of a Conceptual Framework for the V2G in common is the batteries, which provide good storage capacity that can be effectively integrated

  4. 495 Tech Way NW Atlanta, GA 30318

    E-Print Network [OSTI]

    Li, Mo

    495 Tech Way NW Atlanta, GA 30318 404.385.0384 comments@energy.gatech.edu Copyright 2014 · Georgia concerns, low-cost, clean, secure energy solutions will be necessary to address our global energy needs and sustain our way of life. Georgia Tech Energy Innovations The Strategic Energy Institute's scientists

  5. Defect studies in low-temperature-grown GaAs

    SciTech Connect (OSTI)

    Bliss, D.E.

    1992-11-01

    High content of excess As is incorporated in GaAs grown by low-temperature molecular-beam-epitaxy (LTMBE). The excess As exists primarily as As antisite defects AsGa and a lesser extent of gallium vacancies V[sub Ga]. The neutral AsGa-related defects were measured by infrared absorption at 1[mu]m. Gallium vacancies, V[sub Ga], was investigated by slow positron annihilation. Dependence of defect contents on doping was studied by Si and Be dopants. No free carriers are generated by n-type or p-type doping up to 10[sup 19] cm[sup [minus]3] Si or Be. Raman data indicate Be occupies Ga substitutional sites but Si atom is not substitutional. Si induces more As[sub Ga] in the layer. As As[sub Ga] increases, photoquenchable As[sub Ga] decreases. Fraction of photoquenchable defects correlates to defects within 3 nearest neighbor separations disrupting the metastability. Annealing reduces neutral As[sub Ga] content around 500C, similar to irradiation damaged and plastically deformed Ga[sub As], as opposed to bulk grown GaAs in which As[sub Ga]-related defects are stable up to 1100C. The lower temperature defect removal is due to V[sub Ga] enhanced diffusion of As[sub Ga] to As precipitates. The supersaturated V[sub GA] and also decreases during annealing. Annealing kinetics for As[sub Ga]-related defects gives 2.0 [plus minus] 0.3 eV and 1.5 [plus minus] 0.3 eV migration enthalpies for the As[sub Ga] and V[sub Ga]. This represents the difference between Ga and As atoms hopping into the vacancy. The non-photoquenchable As[sub Ga]-related defects anneal with an activation energy of 1.1 [plus minus] 0.3eV. Be acceptors can be activated by 800C annealing. Temperature difference between defect annealing and Be activation formation of As[sub Ga]-Be[sub Ga] pairs. Si donors can only be partially activated.

  6. Electron mobility enhancement in AlN/GaN/AlN heterostructures with InGaN nanogrooves

    E-Print Network [OSTI]

    it was discovered by Davydov et al.1 and con- firmed by independent studies2,3 that its band gap is small, EG InN =0 The conduction band offset at GaN/AlN interface was estimated as EQW=0.7 EG AlN -EG GaN =1918 meV. The nanoN/GaN/AlN QW. The depth of the nanogroove is calculated as E0=0.8 EG GaN -EG InxGa1-xN . The band gap of InxGa1

  7. Development and Industrialization of InGaN/GaN LEDs on Patterned...

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

    epitaxial growth of indium gallium nitride (InGaN) layers capable of producing high-efficiency LEDs when combined with chip-on-board packaging techniques. The proposed...

  8. High-field quasi-ballistic transport in AlGaN/GaN heterostructures

    SciTech Connect (OSTI)

    Danilchenko, B. A.; Tripachko, N. A.; Belyaev, A. E.; Vitusevich, S. A. Hardtdegen, H.; Lüth, H.

    2014-02-17

    Mechanisms of electron transport formation in 2D conducting channels of AlGaN/GaN heterostructures in extremely high electric fields at 4.2?K have been studied. Devices with a narrow constriction for the current flow demonstrate high-speed electron transport with an electron velocity of 6.8?×?10{sup 7}?cm/s. Such a velocity is more than two times higher than values reported for conventional semiconductors and about 15% smaller than the limit value predicted for GaN. Superior velocity is attained in the channel with considerable carrier reduction. The effect is related to a carrier runaway phenomenon. The results are in good agreement with theoretical predictions for GaN-based materials.

  9. 2DEG electrodes for piezoelectric transduction of AlGaN/GaN MEMS resonators

    E-Print Network [OSTI]

    Weinstein, Dana

    A 2D electron gas (2DEG) interdigitated transducer (IDT) in Gallium Nitride (GaN) resonators is introduced and demonstrated. This metal-free transduction does not suffer from the loss mechanisms associated with more commonly ...

  10. Emission and Excitation Spectra of ZnO:Ga and ZnO:Ga,N Ceramics

    E-Print Network [OSTI]

    P. A. Rodnyi; I. V. Khodyuk; E. I. Gorokhova; S. B. Mikhrin; P. Dorenbos

    2010-09-07

    The spectral characteristics of ZnO:Ga and ZnO:Ga,N ceramics prepared by uniaxial hot pressing have been investigated. At room temperature, the edge (exciton) band at 3.12 eV dominates in the luminescence spectra of ZnO:Ga, while a wide luminescence band at 2.37 eV, which is likely to be due to zinc vacancies, is observed in the spectra of ZnO:Ga,N. Upon heating, the edge band maximum shifts to lower energies and the bandwidth increases. The extrapolated position of the edge-band maximum at zero temperature, Em(0) = 3.367 +/- 0.005 eV, is in agreement with the data for thin zinc oxide films. The luminescence excitation spectra in the range from 3 to 6.5 eV are reported and the mechanism of energy transfer to excitons and luminescence centers is considered.

  11. Composition profiling of GaAs/AlGaAs quantum dots grown by droplet epitaxy

    SciTech Connect (OSTI)

    Bocquel, J.; Koenraad, P. M. [Department of Applied Physics, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven (Netherlands); Giddings, A. D.; Prosa, T. J.; Larson, D. J. [CAMECA Instruments, Inc., 5500 Nobel Drive, Madison, Wisconsin 53711 (United States); Mano, T. [National Institute for Materials Science, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan)

    2014-10-13

    Droplet epitaxy (DE) is a growth method which can create III-V quantum dots (QDs) whose optoelectronic properties can be accurately controlled through the crystallisation conditions. In this work, GaAs/AlGaAs DE-QDs have been analyzed with the complimentary techniques of cross-sectional scanning tunneling microscopy and atom probe tomography. Structural details and a quantitative chemical analysis of QDs of different sizes are obtained. Most QDs were found to be pure GaAs, while a small proportion exhibited high intermixing caused by a local etching process. Large QDs with a high aspect ratio were observed to have an Al-rich crown above the GaAs QD. This structure is attributed to differences in mobility of the cations during the capping phase of the DE growth.

  12. On strongly GA-convex functions and stochastic processes

    SciTech Connect (OSTI)

    Bekar, Nurgül Okur; Akdemir, Hande Günay; ??can, ?mdat

    2014-08-20

    In this study, we introduce strongly GA-convex functions and stochastic processes. We provide related well-known Kuhn type results and Hermite-Hadamard type inequality for strongly GA-convex functions and stochastic processes.

  13. Energy absorption in Ni-Mn-Ga/ polymer composites

    E-Print Network [OSTI]

    Feuchtwanger, Jorge

    2006-01-01

    In recent years Ni-Mn-Ga has attracted considerable attention as a new kind of actuator material. Off-stoichiometric single crystals of Ni2MnGa can regularly exhibit 6% strain in tetragonal martensites and orthorhombic ...

  14. InGaAs/GaAs (110) quantum dot formation via step meandering

    SciTech Connect (OSTI)

    Diez-Merino, Laura; Tejedor, Paloma

    2011-07-01

    InGaAs (110) semiconductor quantum dots (QDs) offer very promising prospects as a material base for a new generation of high-speed spintronic devices, such as single electron transistors for quantum computing. However, the spontaneous formation of InGaAs QDs is prevented by two-dimensional (2D) layer-by-layer growth on singular GaAs (110) substrates. In this work we have studied, by using atomic force microscopy and photoluminescence spectroscopy (PL), the growth of InGaAs/GaAs QDs on GaAs (110) stepped substrates by molecular beam epitaxy (MBE), and the modification of the adatom incorporation kinetics to surface steps in the presence of chemisorbed atomic hydrogen. The as-grown QDs exhibit lateral dimensions below 100 nm and emission peaks in the 1.35-1.37 eV range. It has been found that a step meandering instability derived from the preferential attachment of In adatoms to [110]-step edges relative to [11n]-type steps plays a key role in the destabilization of 2D growth that leads to 3D mound formation on both conventional and H-terminated vicinal substrates. In the latter case, the driving force for 3D growth via step meandering is enhanced by H-induced upward mass transport in addition to the lower energy cost associated with island formation on H-terminated substrates, which results in a high density array of InGaAs/GaAs dots selectively nucleated on the terrace apices with reduced lateral dimensions and improved PL efficiency relative to those of conventional MBE-grown samples.

  15. Sheet resistance under Ohmic contacts to AlGaN/GaN heterostructures

    SciTech Connect (OSTI)

    Haj?asz, M., E-mail: m.hajlasz@m2i.nl [Materials innovation institute (M2i), Mekelweg 2, 2628 CD, Delft (Netherlands); MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede (Netherlands); Donkers, J. J. T. M.; Sque, S. J.; Heil, S. B. S. [NXP Semiconductors Research, High Tech Campus 46, 5656 AE, Eindhoven (Netherlands); Gravesteijn, D. J. [NXP Semiconductors Research, High Tech Campus 46, 5656 AE, Eindhoven (Netherlands); MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede (Netherlands); Rietveld, F. J. R. [NXP Semiconductors, Gerstweg 2, 6534 AE, Nijmegen (Netherlands); Schmitz, J. [MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE, Enschede (Netherlands)

    2014-06-16

    For the determination of specific contact resistance in semiconductor devices, it is usually assumed that the sheet resistance under the contact is identical to that between the contacts. This generally does not hold for contacts to AlGaN/GaN structures, where an effective doping under the contact is thought to come from reactions between the contact metals and the AlGaN/GaN. As a consequence, conventional extraction of the specific contact resistance and transfer length leads to erroneous results. In this Letter, the sheet resistance under gold-free Ti/Al-based Ohmic contacts to AlGaN/GaN heterostructures on Si substrates has been investigated by means of electrical measurements, transmission electron microscopy, and technology computer-aided design simulations. It was found to be significantly lower than that outside of the contact area; temperature-dependent electrical characterization showed that it exhibits semiconductor-like behavior. The increase in conduction is attributed to n-type activity of nitrogen vacancies in the AlGaN. They are thought to form during rapid thermal annealing of the metal stack when Ti extracts nitrogen from the underlying semiconductor. The high n-type doping in the region between the metal and the 2-dimensional electron gas pulls the conduction band towards the Fermi level and enhances horizontal electron transport in the AlGaN. Using this improved understanding of the properties of the material underneath the contact, accurate values of transfer length and specific contact resistance have been extracted.

  16. AlGaAs/GaAs photovoltaic converters for high power narrowband radiation

    SciTech Connect (OSTI)

    Khvostikov, Vladimir; Kalyuzhnyy, Nikolay; Mintairov, Sergey; Potapovich, Nataliia; Shvarts, Maxim; Sorokina, Svetlana; Andreev, Viacheslav; Luque, Antonio

    2014-09-26

    AlGaAs/GaAs-based laser power PV converters intended for operation with high-power (up to 100 W/cm{sup 2}) radiation were fabricated by LPE and MOCVD techniques. Monochromatic (? = 809 nm) conversion efficiency up to 60% was measured at cells with back surface field and low (x = 0.2) Al concentration 'window'. Modules with a voltage of 4 V and the efficiency of 56% were designed and fabricated.

  17. Guided Neuronal Growth on Arrays of Biofunctionalized GaAs/InGaAs Semiconductor Microtubes

    E-Print Network [OSTI]

    Cornelius S. Bausch; Aune Koitmäe; Eric Stava; Amanda Price; Pedro J. Resto; Yu Huang; David Sonnenberg; Yuliya Stark; Christian Heyn; Justin C. Williams; Erik W. Dent; Robert H. Blick

    2013-05-06

    We demonstrate embedded growth of cortical mouse neurons in dense arrays of semiconductor microtubes. The microtubes, fabricated from a strained GaAs/InGaAs heterostructure, guide axon growth through them and enable electrical and optical probing of propagating action potentials. The coaxial nature of the microtubes -- similar to myelin -- is expected to enhance the signal transduction along the axon. We present a technique of suppressing arsenic toxicity and prove the success of this technique by overgrowing neuronal mouse cells.

  18. Lateral and Vertical Transistors Using the AlGaN/GaN Heterostructure

    SciTech Connect (OSTI)

    Chowdhury, S; Mishra, UK

    2013-10-01

    Power conversion losses are endemic in all areas of electricity consumption, including motion control, lighting, air conditioning, and information technology. Si, the workhorse of the industry, has reached its material limits. Increasingly, the lateral AlGaN/GaN HEMT based on gallium nitride (GaN-on-Si) is becoming the device of choice for medium power electronics as it enables high-power conversion efficiency and reduced form factor at attractive pricing for wide market penetration. The reduced form factor enabled by high-efficiency operation at high frequency further enables significant system price reduction because of savings in bulky extensive passive elements and heat sink costs. The high-power market, however, still remains unaddressed by lateral GaN devices. The current and voltage demand for high power conversion application makes the chip area in a lateral topology so large that it becomes more difficult to manufacture. Vertical GaN devices would play a big role alongside of silicon carbide (SiC) to address the high power conversion needs. In this paper, the development, performance, and status of lateral and vertical GaN devices are discussed.

  19. GaNPAs Solar Cells Lattice-Matched To GaP: Preprint

    SciTech Connect (OSTI)

    Geisz, J. F.; Friedman, D. J.; Kurtz, S.

    2002-05-01

    This conference paper describes the III-V semiconductors grown on silicon substrates are very attractive for lower-cost, high-efficiency multijunction solar cells, but lattice-mismatched alloys that result in high dislocation densities have been unable to achieve satisfactory performance. GaNxP1-x-yAsy is a direct-gap III-V alloy that can be grown lattice-matched to Si when y= 4.7x - 0.1. We propose the use of lattice-matched GaNPAs on silicon for high-efficiency multijunction solar cells. We have grown GaNxP1-x-yAsy on GaP (with a similar lattice constant to silicon) by metal-organic chemical vapor phase epitaxy with direct band-gaps in the range of 1.5 to 2.0 eV. We demonstrate the performance of single-junction GaNxP1-x-yAsy solar cells grown on GaP substrates and discuss the prospects for the development of monolithic high-efficiency multijunction solar cells based on silicon substrates.

  20. Accurate characterization and improvement of GaAs microstrip attenuation 

    E-Print Network [OSTI]

    Carroll, James Mason

    1992-01-01

    Convergence. III. E. 6 Final Model. III. F Simulation Results for 100 um GaAs. . III. F. 1 On-GaAs Microstrip. III. I', 2 Suspended Microstrip Line . . . . 50 . . . . 51 . . . . 54 . . . . 56 . . . . 56 . . . 56 . . . . 64 64 . . . , 64 III. F. 3... Comparison Between On-GaAs and Suspcndcd Microstrip . . . 68 III. F. 4 Microstrip Inductance III. G EM Parameters in CAD Simulations . . III. H Simulation Results for 150 um GaAs. III. I Conclusions and Recommendations. IV RESEARCH ACCOMPLISHMENTS...

  1. Fuel Used for Off-Road Recreation: A Reassessment of the Fuel Use Model

    E-Print Network [OSTI]

    Fuel Used for Off-Road Recreation: A Reassessment of the Fuel Use Model Stacy C. Davis Lorena F. Truett Patricia S. Hu #12;ORNL/TM-1999/100 Fuel Used for Off-Road Recreation: A Reassessment of the Fuel.S. Department of Energy under Contract No. DE-AC05-96OR22464 #12;#12;Fuel Used for Off-Road Recreation

  2. Automatic contour-based road network design for optimized wind farm micrositing

    E-Print Network [OSTI]

    Gu, H; Wang, J; Lin, Q; Gong, Q

    2015-01-01

    in Zhejiang: Analysis of wind farm construction cost,” Eastroute slection on wind farm construction,” in Proc. 2010planning of the wind farm construction. A well-chosen road

  3. ?DENTIFICATION OF LOCATION OF ANIMAL-VEHICLE COLLISION AND PRINCIPALS OF ITS MITIGATION ON THE ROADS

    E-Print Network [OSTI]

    Kokhan, Oleh

    2015-01-01

    24, Kyiv, 03151, Ukraine. ?-mail: interecocentre@gmail.comthe United States [7]. In Ukraine, according to the Interiorof AVC on the roads in Ukraine. REFERENCES 1. Conover,

  4. Application of SCR and PM-METALIT for Non-Road Applications: SCRi

    Broader source: Energy.gov [DOE]

    Advantages of this new application of SCR and PM-METALIT for non-road applications include compact design, robustness, low backpressure, and cost

  5. USVI Energy Road Map: Charting the Course to a Clean Energy Future...

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

    More Documents & Publications USVI Energy Road Map: Charting the Course to a Clean Energy Future (Brochure), EDIN (Energy Development in Island Nations), U.S. Virgin Islands...

  6. Technologies for a Sustainable Heavy-Duty On-Road Fleet

    Broader source: Energy.gov [DOE]

    Only selected energy pathways for the heavy-duty on-road fleet are consistent with the joint objectives of reducing petroleum dependence and mitigating climate change

  7. Advanced technologies for improving high frequency performance of AlGaN/GaN high electron mobility transistors

    E-Print Network [OSTI]

    Chung, Jinwook W. (Jinwook Will)

    2008-01-01

    In this thesis, we have used a combination of physical analysis, numerical simulation and experimental work to identify and overcome some of the main challenges in AlGaN/GaN high electron mobility transistors (HEMTs) for ...

  8. Dillard Road Solar Power Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, Alabama (UtilityInstrumentsArea (DOE GTP) JumpDillard Road Solar Power Facility Jump

  9. Lowering On-Road Fuel Use: A Component Approach

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE:Financing Tool Fits the BillDepartmentSites | DepartmentLowering On-Road Fuel Use: A Component

  10. Airport Road, Wyoming: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: Energy ResourcesAir Quality Jump to:Airforce WindRoad, Wyoming:

  11. Cross Roads, Texas: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButtePower VenturesInformation EU-UNDP ClimatePublicCriteriumCrookstonRoads,

  12. City of New Roads, Louisiana (Utility Company) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoopButte County,Camilla,ThermalCuba City,(RedirectedMinneapolis,City of Neola,Roads,

  13. Bruceville Road Solar Power Facility | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'SHeavy Electricals Ltd BHEL Jump to:BottomlineBro DyfiBruceville Road

  14. EV Everywhere: Charging on the Road | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansas Nuclear Profile 2010Mesoscopy and thermodynamics(Revised)EVon the Road

  15. A New Combustion Synthesis Method for GaN:Eu3+ and Ga2O3 :Eu3+

    E-Print Network [OSTI]

    McKittrick, Joanna

    A New Combustion Synthesis Method for GaN:Eu3+ and Ga2O3 :Eu3+ Luminescent Powders G. A. Hirata1 between the precursors. The preparation of Eu-doped Ga2O3 powders was achieved using a new combustion)3 and Ga(NO3)3 as the precursors and hydrazine as (non-carbonaceous) fuel. A spontaneous combustion

  16. Improved device performance of InAs/GaAs quantum dot solar cells with GaP strain compensation layers

    E-Print Network [OSTI]

    Jalali. Bahram

    Improved device performance of InAs/GaAs quantum dot solar cells with GaP strain compensation Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico optical, electrical, and spectral response characteristics of three-stack InAs/GaAs quantum dot solar

  17. Lattice-Mismatched GaAs/InGaAs Two-Junction Solar Cells by Direct Wafer Bonding

    SciTech Connect (OSTI)

    Tanabe, K.; Aiken, D. J.; Wanlass, M. W.; Morral, A. F.; Atwater, H. A.

    2006-01-01

    Direct bonded interconnect between subcells of a lattice-mismatched III-V compound multijunction cell would enable dislocation-free active regions by confining the defect network needed for lattice mismatch accommodation to tunnel junction interfaces, while metamorphic growth inevitably results in less design flexibility and lower material quality than is desirable. The first direct-bond interconnected multijunction solar cell, a two-terminal monolithic GaAs/InGaAs two-junction solar cell, is reported and demonstrates viability of direct wafer bonding for solar cell applications. The tandem cell open-circuit voltage was approximately the sum of the subcell open-circuit voltages. This achievement shows direct bonding enables us to construct lattice-mismatched III-V multijunction solar cells and is extensible to an ultrahigh efficiency InGaP/GaAs/InGaAsP/InGaAs four-junction cell by bonding a GaAs-based lattice-matched InGaP/GaAs subcell and an InP-based lattice-matched InGaAsP/InGaAs subcell. The interfacial resistance experimentally obtained for bonded GaAs/InP smaller than 0.10 Ohm-cm{sup 2} would result in a negligible decrease in overall cell efficiency of {approx}0.02%, under 1-sun illumination.

  18. Properties of (Ga,Mn)As codoped with Li

    SciTech Connect (OSTI)

    Miyakozawa, Shohei; Chen, Lin; Matsukura, Fumihiro; Ohno, Hideo

    2014-06-02

    We grow Li codoped (Ga,Mn)As layers with nominal Mn composition up to 0.15 by molecular beam epitaxy. The layers before and after annealing are characterized by x-ray diffraction, transport, magnetization, and ferromagnetic resonance measurements. The codoping with Li reduces the lattice constant and electrical resistivity of (Ga,Mn)As after annealing. We find that (Ga,Mn)As:Li takes similar Curie temperature to that of (Ga,Mn)As, but with pronounced magnetic moments and in-plane magnetic anisotropy, indicating that the Li codoping has nontrivial effects on the magnetic properties of (Ga,Mn)As.

  19. 56 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 1, JANUARY 2012 Metamorphic GaAsP and InGaP Solar Cells on GaAs

    E-Print Network [OSTI]

    Haller, Gary L.

    solar cells are triple-junction concentrator devices, with each junction efficiently col- lecting subcell in a multijunction de- vice. GaAs0.66 P0.34 single-junction solar cells with Eg = 1.83 eV were56 IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 1, JANUARY 2012 Metamorphic GaAsP and InGaP Solar

  20. Reactive codoping of GaAlInP compound semiconductors

    DOE Patents [OSTI]

    Hanna, Mark Cooper (Boulder, CO); Reedy, Robert (Golden, CO)

    2008-02-12

    A GaAlInP compound semiconductor and a method of producing a GaAlInP compound semiconductor are provided. The apparatus and method comprises a GaAs crystal substrate in a metal organic vapor deposition reactor. Al, Ga, In vapors are prepared by thermally decomposing organometallic compounds. P vapors are prepared by thermally decomposing phospine gas, group II vapors are prepared by thermally decomposing an organometallic group IIA or IIB compound. Group VIB vapors are prepared by thermally decomposing a gaseous compound of group VIB. The Al, Ga, In, P, group II, and group VIB vapors grow a GaAlInP crystal doped with group IIA or IIB and group VIB elements on the substrate wherein the group IIA or IIB and a group VIB vapors produced a codoped GaAlInP compound semiconductor with a group IIA or IIB element serving as a p-type dopant having low group II atomic diffusion.

  1. Three-junction solar cells comprised of a thin-film GaInP/GaAs tandem cell mechanically stacked on a Si cell

    SciTech Connect (OSTI)

    Yazawa, Y.; Tamura, K.; Watahiki, S.; Kitatani, T.; Ohtsuka, H.; Warabisako, T.

    1997-12-31

    Three-junction tandem solar cells were fabricated by mechanical stacking of a thin-film GaInP/GaAs monolithic tandem cell and a Si cell. The epitaxial lift-off (ELO) technique was used for the thinning of GaInP/GaAs tandem cells. Both spectral responses of the GaInP top cell and the GaAs middle cell in the thin-film GaInP/GaAs monolithic tandem cell were conserved. The Si cell performance has been improved by reducing the absorption loss in the GaAs substrate.

  2. Evaluation of mobile emissions contributions to Mexico City's emissions inventory using on-road and cross-road emission measurements and ambient data

    E-Print Network [OSTI]

    Zavala-Perez, Miguel Angel

    Mobile emissions represent a significant fraction of the total anthropogenic emissions burden in the Mexico City Metropolitan Area (MCMA) and, therefore, it is crucial to use top-down techniques informed by on-road exhaust ...

  3. Chemical beam epitaxy growth of AlGaAs/GaAs tunnel junctions using trimethyl aluminium for multijunction solar cells

    SciTech Connect (OSTI)

    Paquette, B.; DeVita, M.; Turala, A.; Kolhatkar, G.; Boucherif, A.; Jaouad, A.; Aimez, V.; Arès, R.; Wilkins, M.; Wheeldon, J. F.; Walker, A. W.; Hinzer, K.; Fafard, S.

    2013-09-27

    AlGaAs/GaAs tunnel junctions for use in high concentration multijunction solar cells were designed and grown by chemical beam epitaxy (CBE) using trimethyl aluminium (TMA) as the p-dopant source for the AlGaAs active layer. Controlled hole concentration up to 4?10{sup 20} cm{sup ?3} was achieved through variation in growth parameters. Fabricated tunnel junctions have a peak tunneling current up to 6140 A/cm{sup 2}. These are suitable for high concentration use and outperform GaAs/GaAs tunnel junctions.

  4. 0.7-eV GaInAs Junction for a GaInP/GaAs/GaInAs(1eV)/GaInAs(0.7eV) Four-Junction Solar Cell

    SciTech Connect (OSTI)

    Friedman, D. J.; Geisz, J. F.; Norman, A. G.; Wanlass, M. W.; Kurtz, S. R.

    2006-01-01

    We discuss recent developments in III-V multijunction solar cells, focusing on adding a fourth junction to the Ga{sub 0.5}In{sub 0.5} P/GaAs/Ga{sub 0.75}In{sub 0.25}As inverted three-junction cell. This cell, grown inverted on GaAs so that the lattice-mismatched Ga{sub 0.75}In{sub 0.25}As third junction is the last one grown, has demonstrated 38% efficiency, and 40% is likely in the near future. To achieve still further gains, a lower-bandgap Ga{sub x}In{sub 1-x}As fourth junction could be added to the three-junction structure for a four-junction cell whose efficiency could exceed 45% under concentration. Here, we present the initial development of the Ga{sub x}In{sub 1-x}As fourth junction. Junctions of various bandgaps ranging from 0.88 to 0.73 eV were grown, in order to study the effect of the different amounts of lattice mismatch. At a bandgap of 0.88 eV, junctions were obtained with very encouraging {approx}80% quantum efficiency, 57% fill factor, and 0.36 eV open-circuit voltage. The device performance degrades with decreasing bandgap (i.e., increasing lattice mismatch). We model the four-junction device efficiency vs. fourth junction bandgap to show that an 0.7-eV fourth-junction bandgap, while optimal if it could be achieved in practice, is not necessary; an 0.9-eV bandgap would still permit significant gains in multijunction cell efficiency while being easier to achieve than the lower-bandgap junction.

  5. Reference: RGL 86-03 Subject: EXEMPTIONS TO CWA-ROADS

    E-Print Network [OSTI]

    US Army Corps of Engineers

    of which is exempted by Section 404(f)(1)(E) of the Clean Water Act: "The determination whether a road is a forest road under Section 404(f)(1)(E) is not limited to consideration of its use in tree harvesting per for harvesting trees, and which subsequently will itself be used directly in harvesting, may also reasonably

  6. An Investigation of Different Computing Sources for Mobile Application Outsourcing on the Road

    E-Print Network [OSTI]

    Chen, Songqing

    mobile applications on the road. Considering the response time to the user and the battery powerAn Investigation of Different Computing Sources for Mobile Application Outsourcing on the Road@gmu.edu,sqchen@cs.gmu.edu Abstract. Mobile applications are growing fast due to pervasive usage of mobile devices. With inherently

  7. Plug-in Hybrid Electric Vehicle On-Road Emissions Characterization and Demonstration Study

    E-Print Network [OSTI]

    Hohl, Carrie

    2012-12-31

    On-road emissions and operating data were collected from a plug-in hybrid electric vehicle (PHEV) over the course of 6months spanning August 2007 through January 2008 providing the first comprehensive on-road evaluation of the PHEV drivetrain...

  8. Avian Response to Road Construction Noise with Emphasis on the Endangered Golden-cheeked Warbler 

    E-Print Network [OSTI]

    Lackey, Melissa A.

    2011-08-08

    of construction noise on reproductive success and territory selection of golden-cheeked warblers (Dendroica chrysoparia) at 3 sites: adjacent to road construction, adjacent to road-noise only, and a control with no noise or construction activity. I also examined...

  9. LASER SCANNING AND NOISE REDUCTION APPLIED TO 3D ROAD SURFACE ANALYSIS

    E-Print Network [OSTI]

    LASER SCANNING AND NOISE REDUCTION APPLIED TO 3D ROAD SURFACE ANALYSIS Thorsten Schulz and Hilmar, EAWAG Email: michele.steiner@eawag.ch Abstract: Terrestrial laser scanning was applied to acquire 3D the catchment area of a road with respect to a pilot plant. As laser scanning requires only a few minutes

  10. Experiments for Online Estimation of Heavy Vehicle's Mass and Time-Varying Road Grade

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    for online estimation of Heavy Duty Vehicle mass and road grade. The test data is obtained from high- wayExperiments for Online Estimation of Heavy Vehicle's Mass and Time-Varying Road Grade Ardalan Vahidi 1 Anna Stefanopoulou Huei Peng Mechanical Engineering Dept., University of Michigan, Ann Arbor

  11. Future of Space Astronomy: A global Road Map for the next decades

    E-Print Network [OSTI]

    Schrijver, Karel

    Review Future of Space Astronomy: A global Road Map for the next decades Pietro Ubertini a, , Neil Institute of Fundamental Research, 400005 Mumbai, India i Department of Physics, Tokyo Institute held in Bremen, Germany in July 2010. The purpose of this Working Group was to establish a Road Map

  12. ENVIRONMENTAL MICROBIOLOGY Arcellacea (Testate Amoebae) as Bio-indicators of Road Salt

    E-Print Network [OSTI]

    Patterson, Timothy

    ENVIRONMENTAL MICROBIOLOGY Arcellacea (Testate Amoebae) as Bio-indicators of Road Salt in a significant reduction in road accidents. Deicing salts can, however, pose a major threat to water quality lakes that have become contaminated by winter deicing salts, particularly sodium chloride. We analysed

  13. ON-ROAD REMOTE SENSING OF VEHICLE EMISSIONS IN MONTERREY, N.L. MEXICO

    E-Print Network [OSTI]

    Denver, University of

    ON-ROAD REMOTE SENSING OF VEHICLE EMISSIONS IN MONTERREY, N.L. MEXICO Final Report Prepared for the University of Denver traveled to Monterrey, N.L. Mexico to monitor remotely the carbon monoxide (CO with other cities that have been sampled in Mexico. The on-road emission averages are similar to the latest

  14. On-Road Remote Sensing of Automobile Emissions in west Los Angeles: Year 4,

    E-Print Network [OSTI]

    Denver, University of

    (or completely) converting engine-out CO, HC and NO emissions to carbon dioxide (CO2), waterOn-Road Remote Sensing of Automobile Emissions in west Los Angeles: Year 4, October 2005 Gary A Alpharetta, Georgia 30022 Contract No. E-23-9 #12;On-Road Remote Sensing in west Los Angeles: Year 4 1

  15. Effects of road de-icing salt (NaCl) on larval wood frogs (Rana sylvatica)

    E-Print Network [OSTI]

    , and they increase pollution from vehicles and road maintenance (Ashley and Robinson, 1996; Forman and Alexander environmental effects including pollution. A major component of road runoff in northern countries is salt organisms exist. Amphibians require aquatic habitats and chemical pollution is implicated as a major factor

  16. Bumpy Road Ahead: Bracing for Insolvency in the Highway Trust Fund 

    E-Print Network [OSTI]

    Dar, Jawad; Taylor, Lori L.

    2015-01-01

    . They recommend a congestion-adjusted vehicle mileage tax (VMT) as an economically efficient means of tackling infrastructure funding issues in a way that reflects the costs of road use. However, given the serious privacy issues associated with tracking road use...

  17. On-Road Emissions of Motor Vehicles in Brazil: Current Status

    E-Print Network [OSTI]

    Denver, University of

    On-Road Emissions of Motor Vehicles in Brazil: Current Status and Future Possibilities of Denver 2101 E. Wesley Ave. Denver, CO 80208 #12;#12;On-road system Motorcycle system #12;#12;RSD measures pollutant per kg of fuel from RSD -quantifiable uncertainty Fuel sales from tax department -quite precise

  18. Fuel-Based On-Road Motor Vehicle Emissions Inventory for the Denver Metropolitan Area

    E-Print Network [OSTI]

    Denver, University of

    Fuel-Based On-Road Motor Vehicle Emissions Inventory for the Denver Metropolitan Area Sajal S of obtaining on-road emissions inventories has been developed. This technique calculates emission factors these factors with fuel use data, available from tax records, yields a fuel based emission inventory. We have

  19. INFLUENCE OF VEGETATION, TOPOGRAPHY, AND ROADS ON COUGAR MOVEMENT IN SOUTHERN CALIFORNIA

    E-Print Network [OSTI]

    Beier, Paul

    264 INFLUENCE OF VEGETATION, TOPOGRAPHY, AND ROADS ON COUGAR MOVEMENT IN SOUTHERN CALIFORNIA BRETT of corridors, and that corridors should lie along routes with relatively gentle topography. Our results suggest, topography, and roads can help parameterize an individually-based movement model for cougars in human

  20. Comparison of Different Load Road Implementation Strategies on Fuel Economy of USPS Step Vans

    Broader source: Energy.gov [DOE]

    An alternative form of measuring road loads, instead of using a chassis dynamometer and a method described in 40 CFR section 86.1229-85, was conducted on on-road coastdowns, and regression analysis was used to determine the characteristics of the two U.S. Postal Service step vans, one of which was a hybrid model

  1. Low-Latency ECDSA Signature Verification A Road Towards Safer Traffic

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    caused by the rising traffic densities on our roads and in our cities. Traffic congestion is increasingly crippling efficient movement inside and towards cities resulting in mounting travel times, fuel consumption and consequent air pollution. In the past these problems have been addressed by expanding road infrastructure

  2. Loggers and Forest Fragmentation: Behavioral Models of Road Building in the Amazon Basin

    E-Print Network [OSTI]

    Walker, Robert T.

    in the landscape, the importance of legal and institutional constraints on economic behavior, and the power of GIS biodiversity and forest fragmentation implied by island biogeography (Whittaker 1998). Roads and market are transformed into human artifacts by the urban and ag- ricultural use of land. Although roads appear

  3. On-Road Remote Sensing of Automobile Emissions in the Omaha Area: Year 2,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Omaha Area: Year 2, September 2004 Gary A of the work. #12;On-Road Remote Sensing in the Omaha Area: Year 2 2 EXECUTIVE SUMMARY The University of Denver conducted a five-day remote sensing study in the Omaha, Nebraska area in September of 2004. The remote

  4. On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 6,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 6, January 2007 Gary A 80208 June 2007 #12;On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 6 1 EXECUTIVE SUMMARY The University of Denver conducted a three-day remote sensing study in the Denver, CO area

  5. On-Road Remote Sensing of Automobile Emissions in the LaBrea Area: Year 2

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the LaBrea Area: Year 2 Mitchell J. Williams 140 Alpharetta, Georgia 30022 Contract No. E-23-4 #12;On-Road Remote Sensing of Automobile Emissions in the LaBrea Area: Year 2 1 EXECUTIVE SUMMARY The University of Denver conducted a five-day remote sensing

  6. On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 5,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 5, September 2002 Gary A five years of a multi-year remote sensing study in the Chicago area, with measurements made as to the extent I/M programs and #12;On-Road Remote Sensing in the Chicago Area: Year 5 2 special fuels contribute

  7. On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 3

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 3 Sajal S. Pokharel, Gary Alpharetta, Georgia 30022-8246 Contract No. E-23-4 #12;On-Road Remote Sensing in the Chicago Area: Year 3 2 EXECUTIVE SUMMARY The University of Denver has completed the first three years of a five-year remote sensing

  8. On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 6,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 6, September 2004 Gary A, Suite 140 Alpharetta, Georgia 30022 Contract No. E-23-9 #12;On-Road Remote Sensing in the Chicago Area-year remote sensing study in the Chicago area, with measurements made in September of 1997 through 2000, 2002

  9. On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 1

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 1 Peter J. Popp, Gary A, Georgia 30346 Contract No. E-23-4 #12;On-Road Remote Sensing in the Chicago Area: Year 1 2 EXECUTIVE SUMMARY The University of Denver conducted a five-day remote sensing study in the Chicago area in the fall

  10. On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 5,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 5, January 2005 Gary A, Suite 140 Alpharetta, Georgia 30022 Contract No. E-23-9 #12;On-Road Remote Sensing of Automobile-day remote sensing study in the Denver, CO area in the winter of 2005. The remote sensor used in this study

  11. On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 2

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 2 Sajal S. Pokharel, Gary A Alpharetta, Georgia 30022 CRC Project No. E-23-4 #12;On-Road Remote Sensing in the Denver Area: Year 2 2 EXECUTIVE SUMMARY The University of Denver has completed the second year of a five-year remote sensing study

  12. On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 4,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 4, January 2003 Daniel A year of a multi-year remote sensing study in the Denver area. The remote sensor used in this study channel was somewhat significant. #12;On-Road Remote Sensing in the Denver Area: Year 4 2 INTRODUCTION

  13. On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 3

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Denver Area: Year 3 Sajal S. Pokharel, Gary A Alpharetta, Georgia 30022 CRC Project No. E-23-4 #12;On-Road Remote Sensing in the Denver Area: Year 3 2 EXECUTIVE SUMMARY The University of Denver has completed the third year of a multi-year remote sensing study

  14. On-Road Remote Sensing of Automobile Emissions in the La Brea Area: Year 3,

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the La Brea Area: Year 3, October 2003 Gary A, Suite 140 Alpharetta, Georgia 30022 Contract No. E-23-4 #12;On-Road Remote Sensing in the La Brea Area: Year 3 1 EXECUTIVE SUMMARY The University of Denver conducted a five-day remote sensing study in the La

  15. Examining the Severity of Motor Vehicle Crashes Involving Roadside Barriers on High Speed Roads 

    E-Print Network [OSTI]

    Xavier, Connie Beth

    2014-09-08

    the effectiveness of roadside safety barriers that are placed on such roads. Current crash test guidelines are contained in the Manual for Assessing Safety Hardware (MASH), which defines 62 mph being the 85th percentile impact speed for high speed roads. A crash...

  16. Marginal costs of freeway traffic congestion with on-road pollution exposure externality

    E-Print Network [OSTI]

    Bertini, Robert L.

    Marginal costs of freeway traffic congestion with on-road pollution exposure externality Alexander August 2012 Received in revised form 6 March 2013 Accepted 23 September 2013 Keywords: External costs Traffic congestion On-road In-vehicle Pollution exposure Vehicle emissions a b s t r a c t The health cost

  17. Hybrid Probabilistic RoadMap -Monte Carlo Motion Planning for Closed Chain Systems with

    E-Print Network [OSTI]

    Han, Li

    Hybrid Probabilistic RoadMap - Monte Carlo Motion Planning for Closed Chain Systems with Spherical@clarku.edu Abstract-- In this paper we propose a hybrid Probabilistic RoadMap - Monte Carlo (PRM-MC) motion planner and connect a large number of robot configurations in order to build a roadmap that reflects the properties

  18. Constrained Tracking on a Road Network Michal Piorkowski and Matthias Grossglauser

    E-Print Network [OSTI]

    Grossglauser, Matthias

    Constrained Tracking on a Road Network Michal Pi´orkowski and Matthias Grossglauser School in scenarios where there are constraints on the movement of nodes, such as with cars on a road network. We. Such a situation may arise because of energy, cost, or radio constraints, or because the tracking system has

  19. Electron tunneling spectroscopy study of electrically active traps in AlGaN/GaN high electron mobility transistors

    SciTech Connect (OSTI)

    Yang, Jie Cui, Sharon; Ma, T. P.; Hung, Ting-Hsiang; Nath, Digbijoy; Krishnamoorthy, Sriram; Rajan, Siddharth

    2013-11-25

    We investigate the energy levels of electron traps in AlGaN/GaN high electron mobility transistors by the use of electron tunneling spectroscopy. Detailed analysis of a typical spectrum, obtained in a wide gate bias range and with both bias polarities, suggests the existence of electron traps both in the bulk of AlGaN and at the AlGaN/GaN interface. The energy levels of the electron traps have been determined to lie within a 0.5?eV band below the conduction band minimum of AlGaN, and there is strong evidence suggesting that these traps contribute to Frenkel-Poole conduction through the AlGaN barrier.

  20. Segregation of In to dislocations in InGaN

    E-Print Network [OSTI]

    Horton, Matthew K.; Rhode, Sneha; Sahonta, Suman-Lata; Kappers, Menno J.; Haigh, Sarah J.; Pennycook, Timothy J.; Humphreys, Colin J.; Dusane, Rajiv O.; Moram, Michelle A.

    2015-01-16

    Daresbury Laboratories, Warrington, WA4 4AD, UK. 5) Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK 6) Dept. Metallurgical Engineering and Materials Science, Indian Institute of Technology Bombay, Mumbai, 400076, India...

  1. A InGaN/GaN quantum dot green ({lambda}=524 nm) laser

    SciTech Connect (OSTI)

    Zhang Meng; Banerjee, Animesh; Lee, Chi-Sen; Hinckley, John M.; Bhattacharya, Pallab

    2011-05-30

    The characteristics of self-organized InGaN/GaN quantum dot lasers are reported. The laser heterostructures were grown on c-plane GaN substrates by plasma-assisted molecular beam epitaxy and the laser facets were formed by focused ion beam etching with gallium. Emission above threshold is characterized by a peak at 524 nm (green) and linewidth of 0.7 nm. The lowest measured threshold current density is 1.2 kA/cm{sup 2} at 278 K. The slope and wall plug efficiencies are 0.74 W/A and {approx}1.1%, respectively, at 1.3 kA/cm{sup 2}. The value of T{sub 0}=233 K in the temperature range of 260-300 K.

  2. Photocapacitance study of type-II GaSb/GaAs quantum ring solar cells

    SciTech Connect (OSTI)

    Wagener, M. C.; Botha, J. R.; Carrington, P. J.; Krier, A.

    2014-01-07

    In this study, the density of states associated with the localization of holes in GaSb/GaAs quantum rings are determined by the energy selective charging of the quantum ring distribution. The authors show, using conventional photocapacitance measurements, that the excess charge accumulated within the type-II nanostructures increases with increasing excitation energies for photon energies above 0.9?eV. Optical excitation between the localized hole states and the conduction band is therefore not limited to the ?(k?=?0) point, with pseudo-monochromatic light charging all states lying within the photon energy selected. The energy distribution of the quantum ring states could consequently be accurately related from the excitation dependence of the integrated photocapacitance. The resulting band of localized hole states is shown to be well described by a narrow distribution centered 407?meV above the GaAs valence band maximum.

  3. Efficiency enhancement of InGaN/GaN solar cells with nanostructures

    SciTech Connect (OSTI)

    Bai, J.; Yang, C. C.; Athanasiou, M.; Wang, T.

    2014-02-03

    We demonstrate InGaN/GaN multi-quantum-well solar cells with nanostructures operating at a wavelength of 520?nm. Nanostructures with a periodic nanorod or nanohole array are fabricated by means of modified nanosphere lithography. Under 1 sun air-mass 1.5 global spectrum illumination, a fill factor of 50 and an open circuit voltage of 1.9?V are achieved in spite of very high indium content in InGaN alloys usually causing degradation of crystal quality. Both the nanorod array and the nanohole array significantly improve the performance of solar cells, while a larger enhancement is observed for the nanohole array, where the conversion efficiency is enhanced by 51%.

  4. Graphene in ohmic contact for both n-GaN and p-GaN

    SciTech Connect (OSTI)

    Zhong, Haijian; Liu, Zhenghui; Shi, Lin; Xu, Gengzhao; Fan, Yingmin; Huang, Zengli [Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, Suzhou 215123 (China); Wang, Jianfeng; Ren, Guoqiang; Xu, Ke, E-mail: kxu2006@sinano.ac.cn [Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, Suzhou 215123 (China); Suzhou Nanowin Science and Technology Co., Ltd., Suzhou 215123 (China)

    2014-05-26

    The wrinkles of single layer graphene contacted with either n-GaN or p-GaN were found both forming ohmic contacts investigated by conductive atomic force microscopy. The local I–V results show that some of the graphene wrinkles act as high-conductive channels and exhibiting ohmic behaviors compared with the flat regions with Schottky characteristics. We have studied the effects of the graphene wrinkles using density-functional-theory calculations. It is found that the standing and folded wrinkles with zigzag or armchair directions have a tendency to decrease or increase the local work function, respectively, pushing the local Fermi level towards n- or p-type GaN and thus improving the transport properties. These results can benefit recent topical researches and applications for graphene as electrode material integrated in various semiconductor devices.

  5. Size-Resolved Particle Number and Volume Emission Factors for On-Road Gasoline and Diesel Motor Vehicles

    E-Print Network [OSTI]

    Ban-Weiss, George A.

    2009-01-01

    matter from on-road gasoline and diesel vehicles.D.H. , Chase, R.E. , 1999b. Gasoline vehicle particle sizeFactors for On-Road Gasoline and Diesel Motor Vehicles

  6. Identifying Contributions of On-road Motor Vehicles to Urban Air Pollution Using Travel Demand Model Data

    E-Print Network [OSTI]

    Wang, Guihua; Bai, Song; Ogden, Joan M.

    2009-01-01

    Health Effects of Motor-Vehicle Air Pollution. University ofon-road motor vehicles to urban air pollution, using travelon-road motor vehicles to urban air pollution using travel

  7. Temperature dependency of the emission properties from positioned In(Ga)As/GaAs quantum dots

    SciTech Connect (OSTI)

    Braun, T.; Schneider, C.; Maier, S.; Forchel, A.; Höfling, S.; Kamp, M.; Igusa, R.; Iwamoto, S.; Arakawa, Y.

    2014-09-15

    In this letter we study the influence of temperature and excitation power on the emission linewidth from site-controlled InGaAs/GaAs quantum dots grown on nanoholes defined by electron beam lithography and wet chemical etching. We identify thermal electron activation as well as direct exciton loss as the dominant intensity quenching channels. Additionally, we carefully analyze the effects of optical and acoustic phonons as well as close-by defects on the emission linewidth by means of temperature and power dependent micro-photoluminescence on single quantum dots with large pitches.

  8. Origins of ion irradiation-induced Ga nanoparticle motion on GaAs surfaces

    SciTech Connect (OSTI)

    Kang, M.; Wu, J. H.; Chen, H. Y.; Thornton, K.; Goldman, R. S. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States)] [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Sofferman, D. L. [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States) [Department of Materials Science and Engineering, University of Michigan, Ann Arbor, Michigan 48109-2136 (United States); Department of Physics, Adelphi University, Garden City, New York 11530-0701 (United States); Beskin, I. [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)] [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109-1040 (United States)

    2013-08-12

    We have examined the origins of ion irradiation-induced nanoparticle (NP) motion. Focused-ion-beam irradiation of GaAs surfaces induces random walks of Ga NPs, which are biased in the direction opposite to that of ion beam scanning. Although the instantaneous NP velocities are constant, the NP drift velocities are dependent on the off-normal irradiation angle, likely due to a difference in surface non-stoichiometry induced by the irradiation angle dependence of the sputtering yield. It is hypothesized that the random walks are initiated by ion irradiation-induced thermal fluctuations, with biasing driven by anisotropic mass transport.

  9. Gregg Hall 35 Colovos Road Durham, New Hampshire 03824-3534 http://www.unh.edu/erg/cstev/ Gregg Hall 35 Colovos Road Durham, New Hampshire 03824-3534 http://www.unh.edu/erg/cstev/

    E-Print Network [OSTI]

    Gregg Hall 35 Colovos Road Durham, New Hampshire 03824-3534 http://www.unh.edu/erg/cstev/ Gregg Hall 35 Colovos Road Durham, New Hampshire 03824-3534 http://www.unh.edu/erg/cstev/ Gregg Hall 35 Colovos Road Durham, New Hampshire 03824-3534 http://www.unh.edu/erg/cstev/ Pervious Concrete Pavement

  10. 2011 Regents of the University of Minnesota. All rights reserved. The University of Minnesota is an equal opportunity educator and employer. Segments of roads with LSFs (right) have better driver visibility and road surface

    E-Print Network [OSTI]

    Minnesota, University of

    and fewer accidents. LSFs can also benefit the atmosphere by storing carbon dioxide and reducing emissions is an equal opportunity educator and employer. Segments of roads with LSFs (right) have better driver visibility and road surface conditions than those without (left), leading to lower road maintenance costs

  11. GaN based nanorods for solid state lighting

    SciTech Connect (OSTI)

    Li Shunfeng; Waag, Andreas [Institute of Semiconductor Technology, Braunschweig University of Technology, 38106 Braunschweig (Germany)

    2012-04-01

    In recent years, GaN nanorods are emerging as a very promising novel route toward devices for nano-optoelectronics and nano-photonics. In particular, core-shell light emitting devices are thought to be a breakthrough development in solid state lighting, nanorod based LEDs have many potential advantages as compared to their 2 D thin film counterparts. In this paper, we review the recent developments of GaN nanorod growth, characterization, and related device applications based on GaN nanorods. The initial work on GaN nanorod growth focused on catalyst-assisted and catalyst-free statistical growth. The growth condition and growth mechanisms were extensively investigated and discussed. Doping of GaN nanorods, especially p-doping, was found to significantly influence the morphology of GaN nanorods. The large surface of 3 D GaN nanorods induces new optical and electrical properties, which normally can be neglected in layered structures. Recently, more controlled selective area growth of GaN nanorods was realized using patterned substrates both by metalorganic chemical vapor deposition (MOCVD) and by molecular beam epitaxy (MBE). Advanced structures, for example, photonic crystals and DBRs are meanwhile integrated in GaN nanorod structures. Based on the work of growth and characterization of GaN nanorods, GaN nanoLEDs were reported by several groups with different growth and processing methods. Core/shell nanoLED structures were also demonstrated, which could be potentially useful for future high efficient LED structures. In this paper, we will discuss recent developments in GaN nanorod technology, focusing on the potential advantages, but also discussing problems and open questions, which may impose obstacles during the future development of a GaN nanorod based LED technology.

  12. Statistical Analysis of the Road Network of India

    E-Print Network [OSTI]

    Mukherjee, Satyam

    2012-01-01

    In this paper we study the Indian Highway Network as a complex network where the junction points are considered as nodes, and the links are formed by an existing connection. We explore the topological properties and community structure of the network. We observe that the Indian Highway Network displays small world properties and is assortative in nature. We also identify the most important road-junctions (or cities) in the highway network based on the betweenness centrality of the node. This could help in identifying the potential congestion points in the network. Our study is of practical importance and could provide a novel approach to reduce congestion and improve the performance of the highway network

  13. Road Type Classification through Data Mining Phillip Taylor, Sarabjot Singh Anand, Nathan Griffiths, Fatimah Adamu-Fika

    E-Print Network [OSTI]

    Griffiths, Nathan

    Road Type Classification through Data Mining Phillip Taylor, Sarabjot Singh Anand, Nathan Griffiths In this paper we investigate data mining approaches to road type classification based on CAN (controller area network) bus data collected from vehicles on UK roads. We consider three related classification problems

  14. The Road We've Traveled: 12 Years of Undergraduate Software Engineering at the Rochester Institute of Technology

    E-Print Network [OSTI]

    Vallino, James R

    The Road We've Traveled: 12 Years of Undergraduate Software Engineering at the Rochester Institute lecturer, and several adjuncts. The program's development was first described in "The Road Less Traveled the road we've traveled, changes made, and how the program changed along the way, and consider the path

  15. Paving the road in virtual spaces IRS Workshop Territoriality of the Commons 29.-30. Sept.2011 Rainer Kuhlen

    E-Print Network [OSTI]

    Kuhlen, Rainer

    Paving the road in virtual spaces­ IRS Workshop Territoriality of the Commons 29.-30. Sept.2011 the road in virtual spaces How to materialize rights to immaterial commons #12;Openness ­ Grundprinzip des;Openness ­ Grundprinzip des Handelns in elektronischen Räumen 4 #12;Paving the road in virtual spaces­ IRS

  16. GaInP/GaAs dual junction solar cells on Ge/Si epitaxial templates Melissa J. Archer,1,a

    E-Print Network [OSTI]

    Atwater, Harry

    GaInP/GaAs dual junction solar cells on Ge/Si epitaxial templates Melissa J. Archer,1,a Daniel C, crack-free GaInP/GaAs double junction solar cells were grown by metal organic chemical vapor deposition with the world record efficiency is a metamorphic triple junction GaInP/GaAs/Ge cell.6 Alternatively, wafer

  17. Enhanced hole transport in InGaN/GaN multiple quantum well light-emitting

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    -emitting diodes (LEDs) are considered the new generation lighting sources due to their advantages in power Society of America OCIS codes: 230.3670, 230.5590, 160.6000. Nitride-based high-power light devoted to the development of high-brightness GaN-based LEDs [3­5]. Lateral hole spreading is one

  18. High-Efficiency GaInP/GaAs Tandem Solar Cells

    SciTech Connect (OSTI)

    Bertness, K. A.; Friedman, D. J.; Kurtz, S. R.; Kibbler, A. E.; Cramer, C.; Olson, J. M.

    1996-09-01

    GaInP/GaAs tandem solar cells have achieved efficiencies between 25.7-30.2%, depending on illumination conditions. The efficiencies are the highest confirmed two-terminal values measured for any solar cell within each standard illumination category. The monolithic, series-connected design of the tandem cells allows them to be substituted for silicon or gallium arsenide cells in photovoltaic panel systems with minimal design changes. The advantages of using GaInP/GaAs tandem solar cells in space and terrestrial applications are discussed primarily in terms of the reduction in balance-of-system costs that accrues when using a higher efficiency cell. The new efficiency values represent a significant improvement over previous efficiencies for this materials system, and we identify grid design, back interface passivation, and top interface passivation as the three key factors leading to this improvement. In producing the high-efficiency cells, we have addressed nondestructive diagnostics and materials growth reproducibility as well as peak cell performance.

  19. High-efficiency GaInP/GaAs tandem solar cells

    SciTech Connect (OSTI)

    Bertness, K.A.; Friedman, D.J.; Kurtz, S.R.; Kibbler, A.E.; Kramer, C.; Olson, J.M.

    1994-12-01

    GaInP/GaAs tandem solar cells have achieved new record efficiencies, specifically 25.7% under air-mass 0 (AM0) illumination, 29.5% under AM 1.5 global (AM1.5G) illumination, and 30.2% at 140-180x concentration under AM 1.5 direct (AM1.5D) illumination. These values are the highest two-terminal efficiencies achieved by any solar cell under these illumination conditions. The monolithic, series-connected design of the tandem cells allows them to be substituted for silicon or gallium arsenide cells in photovoltaic panel systems with minimal design changes. The advantages of using GaInP/GaAs tandem solar cells in space and terrestrial applications are discussed primarily in terms of the reduction in balance-of-system costs that accrues when using a higher efficiency cell. The new efficiency values represent a significant improvement over previous efficiencies for this materials system, and we identify grid design, back interface passivation, and top interface passivation as the three key factors leading to this improvement. In producing the high-efficiency cells, we have addressed nondestructive diagnostics and materials growth reproducibility as well as peak cell performance. 31 refs.

  20. TJ Solar Cell (GaInP/GaAs/Ge Ultrahigh-Efficiency Solar Cells

    SciTech Connect (OSTI)

    Friedman, Daniel

    2002-04-17

    This talk will discuss recent developments in III-V multijunction photovoltaic technology which have led to the highest-efficiency solar cells ever demonstrated. The relationship between the materials science of III-V semiconductors and the achievement of record solar cell efficiencies will be emphasized. For instance, epitaxially-grown GAInP has been found to form a spontaneously-ordered GaP/InP (111) superlattice. This ordering affects the band gap of the material, which in turn affects the design of solar cells which incorporate GaInP. For the next generation of ultrahigh-efficiency III-V solar cells, we need a new semiconductor which is lattice-matched to GaAs, has a band gap of 1 eV, and has long minority-carrier diffusion lengths. Out of a number of candidate materials, the recently-discovered alloy GaInNAs appears to have the greatest promise. This material satisfies the first two criteria, but has to date shown very low diffusion lengths, a problem which is our current focus in the development of these next-generation cells.

  1. Multijunction GaInP/GaInAs/Ge solar cells with Bragg reflectors

    SciTech Connect (OSTI)

    Emelyanov, V. M. Kalyuzhniy, N. A.; Mintairov, S. A.; Shvarts, M. Z.; Lantratov, V. M.

    2010-12-15

    Effect of subcell parameters on the efficiency of GaInP/Ga(In)As/Ge tandem solar cells irradiated with 1-MeV electrons at fluences of up to 3 x 10{sup 15} cm{sup -2} has been theoretically studied. The optimal thicknesses of GaInP and GaInAs subcells, which provide the best photocurrent matching at various irradiation doses in solar cells with and without built-in Bragg reflectors, were determined. The dependences of the photoconverter efficiency on the fluence of 1-MeV electrons and on the time of residence in the geostationary orbit were calculated for structures optimized to the beginning and end of their service lives. It is shown that the optimization of the subcell heterostructures for a rated irradiation dose and the introduction of Bragg reflectors into the structure provide a 5% overall increase in efficiency for solar cells operating in the orbit compared with unoptimized cells having no Bragg reflector.

  2. Localized corrosion of GaAs surfaces and formation of porous GaAs

    SciTech Connect (OSTI)

    Schmuki, P.; Vitus, C.M.; Isaacs, H.S.; Fraser, J.; Graham, M.J.

    1995-12-01

    The present work deals with pitting corrosion of p- and n-type GaAs (100). Pit growth can be electrochemically initiated on both conduction types in chloride-containing solutions and leads after extended periods of time to the formation of a porous GaAs structure. In the case of p-type material, localized corrosion is only observed if a passivating film is present on the surface, otherwise -- e.g. in acidic solutions -- the material suffers from a uniform attack (electropolishing) which is independent of the anion present. In contrast, pitting corrosion of n-type material can be triggered independent of the presence of an oxide film. This is explained in terms of the different current limiting factor for the differently doped materials (oxide film in the case of the p- and a space charge layer in the case of the n-GaAs). The porous structure was characterized by SEM, EDX and AES, and consists mainly of GaAs. From scratch experiments it is clear that the pit initiation process is strongly influenced by surface defects. For n-type material, AFM investigations show that light induced roughening of the order of several hundred nm occurs under non-passivating conditions. This nm- scale roughening however does not affect the pitting process.

  3. Demonstration of a semipolar (10(1)over-bar(3)over-bar) InGaN/GaN green light emitting diode

    E-Print Network [OSTI]

    2005-01-01

    InGaN / GaN green light emitting diode R. Sharma, a? P. M.green ??525 nm? light emitting diode ?LED?. The fabricated

  4. Lessons learnt from post EIS evaluations of national road schemes in Ireland

    SciTech Connect (OSTI)

    King, E.A.; O'Malley, V.P.

    2012-01-15

    The Irish National Roads Authority (NRA) recently completed over twenty post environmental impact assessment evaluations of noise chapters prepared as part of Environmental Impact Statements (EISs) for new national road schemes in Ireland. The study focused on a range of issues including a review of noise monitoring procedures, noise prediction methodologies and an assessment of the effectiveness of noise mitigation measures currently in use on national road schemes. This review was carried out taking cognisance of best international practices for noise assessment and methodologies used to mitigate road traffic noise. The primary focus of the study was to assess the actual noise impacts of national road scheme developments and to revise, where necessary, methodologies recommended in the current NRA guidance document describing the treatment of noise on national road schemes. This paper presents a summary of the study and identifies a number of key areas that should be considered prior to the development of future guidance documents. - Highlights: Black-Right-Pointing-Pointer Presents a post-EIS evaluation of noise assessments for national roads in Ireland. Black-Right-Pointing-Pointer The effectiveness of some noise mitigation measures is critically evaluated. Black-Right-Pointing-Pointer Issues related to the current EIS noise assessment methodologies are discussed. Black-Right-Pointing-Pointer Implications for alterations to the NRA noise guidelines.

  5. Inverse spin Hall effect in Pt/(Ga,Mn)As

    SciTech Connect (OSTI)

    Nakayama, H.; Chen, L.; Chang, H. W.; Ohno, H.; Matsukura, F.

    2015-06-01

    We investigate dc voltages under ferromagnetic resonance in a Pt/(Ga,Mn)As bilayer structure. A part of the observed dc voltage is shown to originate from the inverse spin Hall effect. The sign of the inverse spin Hall voltage is the same as that in Py/Pt bilayer structure, even though the stacking order of ferromagnetic and nonmagnetic layers is opposite to each other. The spin mixing conductance at the Pt/(Ga,Mn)As interface is determined to be of the order of 10{sup 19?}m{sup ?2}, which is about ten times greater than that of (Ga,Mn)As/p-GaAs.

  6. Deep level defects in n-type GaAsBi and GaAs grown at low temperatures

    SciTech Connect (OSTI)

    Mooney, P. M.; Watkins, K. P.; Jiang, Zenan; Basile, A. F.; Lewis, R. B.; Bahrami-Yekta, V.; Masnadi-Shirazi, M.; Beaton, D. A.; Tiedje, T.

    2013-04-07

    Deep level defects in n-type GaAs{sub 1-x}Bi{sub x} having 0 < x < 0.012 and GaAs grown by molecular beam epitaxy (MBE) at substrate temperatures between 300 and 400 Degree-Sign C have been investigated by Deep Level Capacitance Spectroscopy. Incorporating Bi suppresses the formation of an electron trap with activation energy 0.40 eV, thus reducing the total trap concentration in dilute GaAsBi layers by more than a factor of 20 compared to GaAs grown under the same conditions. We find that the dominant traps in dilute GaAsBi layers are defect complexes involving As{sub Ga}, as expected for MBE growth at these temperatures.

  7. High efficiency InGaN/GaN light emitting diodes with asymmetric triangular multiple quantum wells

    SciTech Connect (OSTI)

    Chang, Chiao-Yun; Li, Hen; Lu, Tien-Chang, E-mail: timtclu@mail.nctu.edu.tw [Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan 300 (China)

    2014-03-03

    In this study, we demonstrated high efficiency InGaN/GaN light emitting diodes (LEDs) with asymmetric triangular multiple quantum wells (MQWs). Asymmetric triangular MQWs not only contribute to uniform carrier distribution in InGaN/GaN MQWs but also yield a low Auger recombination rate. In addition, asymmetric triangular MQWs with gallium face-oriented inclination band profiles can be immune from the polarization charge originating from typical c-plane InGaN/GaN quantum well structures. In the experiment, LEDs incorporated with asymmetric triangular MQWs with gallium face-oriented inclination band profiles exhibited a 60.0% external quantum efficiency at 20?mA and a 27.0% efficiency droop at 100?mA (corresponding to a current density of 69?A/cm{sup 2}), which accounted for an 11.7% efficiency improvement and a 31.1% droop reduction compared with symmetric square quantum well structure LEDs.

  8. Deep level centers and their role in photoconductivity transients of InGaAs/GaAs quantum dot chains

    SciTech Connect (OSTI)

    Kondratenko, S. V. Vakulenko, O. V.; Mazur, Yu. I. Dorogan, V. G.; Marega, E.; Benamara, M.; Ware, M. E.; Salamo, G. J.

    2014-11-21

    The in-plane photoconductivity and photoluminescence are investigated in quantum dot-chain InGaAs/GaAs heterostructures. Different photoconductivity transients resulting from spectrally selecting photoexcitation of InGaAs QDs, GaAs spacers, or EL2 centers were observed. Persistent photoconductivity was observed at 80?K after excitation of electron-hole pairs due to interband transitions in both the InGaAs QDs and the GaAs matrix. Giant optically induced quenching of in-plane conductivity driven by recharging of EL2 centers is observed in the spectral range from 0.83?eV to 1.0?eV. Conductivity loss under photoexcitation is discussed in terms of carrier localization by analogy with carrier distribution in disordered media.

  9. Au impact on GaAs epitaxial growth on GaAs (111){sub B} substrates in molecular beam epitaxy

    SciTech Connect (OSTI)

    Liao, Zhi-Ming; Chen, Zhi-Gang; Xu, Hong-Yi; Guo, Ya-Nan; Sun, Wen; Zhang, Zhi; Yang, Lei; Lu, Zhen-Yu; Chen, Ping-Ping; Lu, Wei; Zou, Jin; Centre for Microscopy and Microanalysis, The University of Queensland, St. Lucia, Queensland 4072

    2013-02-11

    GaAs growth behaviour under the presence of Au nanoparticles on GaAs {l_brace}111{r_brace}{sub B} substrate is investigated using electron microscopy. It has been found that, during annealing, enhanced Ga surface diffusion towards Au nanoparticles leads to the GaAs epitaxial growth into {l_brace}113{r_brace}{sub B} faceted triangular pyramids under Au nanoparticles, governed by the thermodynamic growth, while during conventional GaAs growth, growth kinetics dominates, resulting in the flatted triangular pyramids at high temperature and the epitaxial nanowires growth at relatively low temperature. This study provides an insight of Au nanoparticle impact on GaAs growth, which is critical for understanding the formation mechanisms of semiconductor nanowires.

  10. An inverted AlGaAs/GaAs patterned-Ge tunnel junction cascade concentrator solar cell

    SciTech Connect (OSTI)

    Venkatasubramanian, R. )

    1993-01-01

    This report describes work to develop inverted-grown Al[sub 0.34]Ga[sub 0.66]As/GaAs cascades. Several significant developments are reported on as follows: (1) The AM1.5 1-sun total-area efficiency of the top Al[sub 0.34]Ga[sub 0.66]As cell for the cascade was improved from 11.3% to 13.2% (NREL measurement [total-area]). (2) The cycled'' organometallic vapor phase epitaxy growth (OMVPE) was studied in detail utilizing a combination of characterization techniques including Hall-data, photoluminescence, and secondary ion mass spectroscopy. (3) A technique called eutectic-metal-bonding (EMB) was developed by strain-free mounting of thin GaAs-AlGaAs films (based on lattice-matched growth on Ge substrates and selective plasma etching of Ge substrates) onto Si carrier substrates. Minority-carrier lifetime in an EMB GaAs double-heterostructure was measured as high as 103 nsec, the highest lifetime report for a freestanding GaAs thin film. (4) A thin-film, inverted-grown GaAs cell with a 1-sun AM1.5 active-area efficiency of 20.3% was obtained. This cell was eutectic-metal-bonded onto Si. (5) A thin-film inverted-grown, Al[sub 0.34]Ga[sub 0.66]As/GaAs cascade with AM1.5 efficiency of 19.9% and 21% at 1-sun and 7-suns, respectively, was obtained. This represents an important milestone in the development of an AlGaAs/GaAs cascade by OMVPE utilizing a tunnel interconnect and demonstrates a proof-of-concept for the inverted-growth approach.

  11. DC characteristics of OMVPE-grown N-p-n InGaP/InGaAsN DHBTs

    SciTech Connect (OSTI)

    Li, N.Y.; Chang, P.C.; Baca, A.G.; Xie, X.M.; Sharps, P.R.; Hou, H.Q.

    2000-01-04

    The authors demonstrate, for the first time, a functional N-p-n heterojunction bipolar transistor using a novel material, InGaAsN, with a bandgap energy of 1.2eV as the p-type base layer. A 300{angstrom}-thick In{sub x}Ga{sub 1-x}As graded layer was introduced to reduce the conduction band offset at the p-type InGaAsN base and n-type GaAs collector junction. For an emitter size of 500 {mu}m{sup 2}, a peak current gain of 5.3 has been achieved.

  12. The Effect of the Thermal Boundary Resistance on Self-Heating of AlGaN/GaN HFETs

    E-Print Network [OSTI]

    sound velocity in GaN. The cut off wave vector is given by where NA is the Avogadro number, is the mass

  13. Reliability of AlGaN/GaN high electron mobility transistors on low dislocation density bulk GaN substrate: Implications of surface step edges

    SciTech Connect (OSTI)

    Killat, N., E-mail: Nicole.Killat@bristol.ac.uk, E-mail: Martin.Kuball@bristol.ac.uk; Montes Bajo, M.; Kuball, M., E-mail: Nicole.Killat@bristol.ac.uk, E-mail: Martin.Kuball@bristol.ac.uk [Center for Device Thermography and Reliability (CDTR), H.H. Wills Physics Laboratory, Tyndall Avenue, Bristol BS8 1TL (United Kingdom); Paskova, T. [Kyma Technologies, Inc., Raleigh, North Carolina 27617 (United States) [Kyma Technologies, Inc., Raleigh, North Carolina 27617 (United States); Materials Science and Engineering Department, North Carolina State University, Raleigh, North Carolina 27695 (United States); Evans, K. R. [Kyma Technologies, Inc., Raleigh, North Carolina 27617 (United States)] [Kyma Technologies, Inc., Raleigh, North Carolina 27617 (United States); Leach, J. [Kyma Technologies, Inc., Raleigh, North Carolina 27617 (United States) [Kyma Technologies, Inc., Raleigh, North Carolina 27617 (United States); Electrical and Computer Engineering Department, Virginia Commonwealth University, Richmond, Virginia 23284 (United States); Li, X.; Özgür, Ü.; Morkoç, H. [Electrical and Computer Engineering Department, Virginia Commonwealth University, Richmond, Virginia 23284 (United States)] [Electrical and Computer Engineering Department, Virginia Commonwealth University, Richmond, Virginia 23284 (United States); Chabak, K. D.; Crespo, A.; Gillespie, J. K.; Fitch, R.; Kossler, M.; Walker, D. E.; Trejo, M.; Via, G. D.; Blevins, J. D. [Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433 (United States)] [Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio 45433 (United States)

    2013-11-04

    To enable gaining insight into degradation mechanisms of AlGaN/GaN high electron mobility transistors, devices grown on a low-dislocation-density bulk-GaN substrate were studied. Gate leakage current and electroluminescence (EL) monitoring revealed a progressive appearance of EL spots during off-state stress which signify the generation of gate current leakage paths. Atomic force microscopy evidenced the formation of semiconductor surface pits at the failure location, which corresponds to the interaction region of the gate contact edge and the edges of surface steps.

  14. "Title","Creator/Author","Publication Date","OSTI Identifier...

    Office of Scientific and Technical Information (OSTI)

    Genetic analysis of inflorescence and plant height components in sorghum (Panicoidae) and comparative genetics with rice (Oryzoidae)","Zhang, Dong Univ. of Georgia, Athens, GA...

  15. TITLE AUTHORS SUBJECT SUBJECT RELATED DESCRIPTION PUBLISHER AVAILABILI...

    Office of Scientific and Technical Information (OSTI)

    Genetic analysis of inflorescence and plant height components in sorghum Panicoidae and comparative genetics with rice Oryzoidae Zhang Dong Univ of Georgia Athens GA United States...

  16. Istanbul,Turkey & Atlanta, GA Istanbul,Turkey

    E-Print Network [OSTI]

    Frantz, Kyle J.

    Istanbul,Turkey & Atlanta, GA Istanbul,Turkey & Atlanta, GA 2012 Media, Journalism and Business for departure to Istanbul,Turkey Day 9 Depart for Istanbul; guided cultural visit upon arrival; group dinner Day business leaders; site visits to local universities Day 18 UPS and the value of logistics inTurkey Day 19

  17. Photoeffects in WO{sub 3}/GaAs electrode

    SciTech Connect (OSTI)

    Yoon, K.H.; Lee, J.W.; Cho, Y.S.; Kang, D.H.

    1996-12-01

    Photoeffects of a {ital p}-type GaAs coated with WO{sub 3} thin film have been investigated as a function of film thickness and photoresponse transients of the WO{sub 3}/GaAs electrode were studied. Also, these results were compared to those for a single {ital p}-type GaAs electrode. The photocurrent of the WO{sub 3}/GaAs electrode depended on the film thickness of the WO{sub 3}, showing an optimum photon efficiency for specimens of 800 A thickness. This is due to the existence of an effective interface state within the band gap which reduces trapping of carriers and facilitates carrier movement. For an 800-A-thick WO{sub 3} thin film deposited {ital p}-GaAs photoelectrode, the photogenerated electrons were found to move to an electrolyte at a higher positive onset potential compared with that of single {ital p}-type GaAs, which was confirmed as a result of transient behavior. {ital I}{endash}{ital V} and {ital C}{endash}{ital V} characteristics of the WO{sub 3}/GaAs electrode were also compared with those of a single {ital p}-type GaAs electrode. {copyright} {ital 1996 American Institute of Physics.}

  18. Room temperature spin transport in undoped (110) GaAs/AlGaAs quantum wells

    SciTech Connect (OSTI)

    Yokota, Nobuhide Aoshima, Yohei; Ikeda, Kazuhiro; Kawaguchi, Hitoshi

    2014-02-17

    We are reporting on our first observation of a micrometer-order electron spin transport in a (110) GaAs/AlGaAs multiple quantum well (QW) at room temperature using a space- and time-resolved Kerr rotation technique. A 37-?m transport was observed within an electron spin lifetime of 1.2?ns at room temperature when using an in-plane electric field of 1.75?kV/cm. The spatio-temporal profiles of electron spins were well reproduced by the spin drift-diffusion equations coupled with the Poisson equation, supporting the validity of the measurement. The results suggest that (110) QWs are useful as a spin transport layer for semiconductor spintronic devices operating at room temperature.

  19. Evaluation of the two-photon absorption characteristics of GaSb/GaAs quantum rings

    SciTech Connect (OSTI)

    Wagener, M. C.; Botha, J. R.; Carrington, P. J.; Krier, A.

    2014-07-28

    The optical parameters describing the sub-bandgap response of GaSb/GaAs quantum rings solar cells have been obtained from photocurrent measurements using a modulated pseudo-monochromatic light source in combination with a second, continuous photo-filling source. By controlling the charge state of the quantum rings, the photoemission cross-sections describing the two-photon sub-bandgap transitions could be determined independently. Temperature dependent photo-response measurements also revealed that the barrier for thermal hole emission from the quantum rings is significantly below the quantum ring localisation energy. The temperature dependence of the sub-bandgap photo-response of the solar cell is also described in terms of the photo- and thermal-emission characteristics of the quantum rings.

  20. Sidewall passivation for InGaN/GaN nanopillar light emitting diodes

    SciTech Connect (OSTI)

    Choi, Won Hyuck; Abraham, Michael; Yu, Shih-Ying [Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); You, Guanjun; Liu, Jie; Wang, Li; Xu, Jian, E-mail: jianxu@engr.psu.edu [Department of Engineering Science and Mechanics, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Mohney, Suzanne E., E-mail: mohney@ems.psu.edu [Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States); Materials Research Institute, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)

    2014-07-07

    We studied the effect of sidewall passivation on InGaN/GaN multiquantum well-based nanopillar light emitting diode (LED) performance. In this research, the effects of varying etch rate, KOH treatment, and sulfur passivation were studied for reducing nanopillar sidewall damage and improving device efficiency. Nanopillars prepared under optimal etching conditions showed higher photoluminescence intensity compared with starting planar epilayers. Furthermore, nanopillar LEDs with and without sulfur passivation were compared through electrical and optical characterization. Suppressed leakage current under reverse bias and four times higher electroluminescence (EL) intensity were observed for passivated nanopillar LEDs compared with unpassivated nanopillar LEDs. The suppressed leakage current and EL intensity enhancement reflect the reduction of non-radiative recombination at the nanopillar sidewalls. In addition, the effect of sulfur passivation was found to be very stable, and further insight into its mechanism was gained through transmission electron microscopy.

  1. Large linear magnetoresistance in a GaAs/AlGaAs heterostructure

    SciTech Connect (OSTI)

    Aamir, Mohammed Ali, E-mail: aamir@physics.iisc.ernet.in; Goswami, Srijit, E-mail: aamir@physics.iisc.ernet.in; Ghosh, Arindam [Department of Physics, Indian Institute of Science, Bangalore 560 012 (India); Baenninger, Matthias; Farrer, Ian; Ritchie, David A. [Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Tripathi, Vikram [Department of Theoretical Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India); Pepper, Michael [Department of Electrical and Electronic Engineering, University College, London WC1E 7JE (United Kingdom)

    2013-12-04

    We report non-saturating linear magnetoresistance (MR) in a two-dimensional electron system (2DES) at a GaAs/AlGaAs heterointerface in the strongly insulating regime. We achieve this by driving the gate voltage below the pinch-off point of the device and operating it in the non-equilibrium regime with high source-drain bias. Remarkably, the magnitude of MR is as large as 500% per Tesla with respect to resistance at zero magnetic field, thus dwarfing most non-magnetic materials which exhibit this linearity. Its primary advantage over most other materials is that both linearity and the enormous magnitude are retained over a broad temperature range (0.3 K to 10 K), thus making it an attractive candidate for cryogenic sensor applications.

  2. Growth of GaN@InGaN Core-Shell and Au-GaN Hybrid Nanostructures for Energy Applications

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

    Kuykendall, Tevye; Aloni, Shaul; Jen-La Plante, Ilan; Mokari, Taleb

    2009-01-01

    We demonstrated a method to control the bandgap energy of GaN nanowires by forming GaN@InGaN core-shell hybrid structures using metal organic chemical vapor deposition (MOCVD). Furthermore, we show the growth of Au nanoparticles on the surface of GaN nanowires in solution at room temperature. The work shown here is a first step toward engineering properties that are crucial for the rational design and synthesis of a new class of photocatalytic materials. The hybrid structures were characterized by various techniques, including photoluminescence (PL), energy dispersive x-ray spectroscopy (EDS), transmission and scanning electron microscopy (TEM and SEM), and x-ray diffraction (XRD).

  3. Feature Shape and Elevation Based Road Classification and Extraction on High Spatial

    E-Print Network [OSTI]

    Carbonara, Joaquin

    Feature Shape and Elevation Based Road Classification and Extraction on High Spatial Resolution #12; 2 Abstract: Classification and extraction of geospatial features from high spatial resolution. However, the conventional method of human interpretation and digitizing cannot fulfill the requirements

  4. An Archaeological Survey for the Greenhouse Road Project in Western Harris County Texas 

    E-Print Network [OSTI]

    Moore, William; Baxter, Edward

    2015-07-28

    Brazos Valley Research Associates (BVRA) performed an archaeological survey along a one-mile segment of the Greenhouse Road lane addition in western Harris County, Texas for Harris County on October 3, 2007. William E. Moore was the Principal...

  5. Finding Multiple Lanes in Urban Road Networks with Vision and Lidar

    E-Print Network [OSTI]

    Huang, Albert S.

    This paper describes a system for detecting and estimating the properties of multiple travel lanes in an urban road network from calibrated video imagery and laser range data acquired by a moving vehicle. The system operates ...

  6. Multi-criteria analysis : an alternative approach for the evaluation of road pricing strategies

    E-Print Network [OSTI]

    Ensor, Jeffrey D. (Jeffrey Douglas)

    2005-01-01

    Interest in road pricing among political leaders, transportation analysts, academics, and government agencies has increased in recent years. There are myriad reasons for this newfound consideration, but the deployment of ...

  7. High gas prices. Road construction. Plane delays. Traffic jams. Fuel emission.

    E-Print Network [OSTI]

    Bustamante, Fabián E.

    1 High gas prices. Road construction. Plane delays. Traffic jams. Fuel emission. Millions of people interdisciplin- ary nature--focusing on economics, engineering and public policy--presents real-life situations

  8. A tale of two roads: Land tenure, poverty, and politics on the Guatemalan frontier

    E-Print Network [OSTI]

    Lopez-Carr, David

    A tale of two roads: Land tenure, poverty, and politics on the Guatemalan frontier David Carr Elsevier Ltd. All rights reserved. doi:10.1016/j.geoforum.2005.02.007 E-mail address: carr

  9. EA-1184: Transfer of the DP Road Tract to the County of Los Alamos, New Mexico

    Broader source: Energy.gov [DOE]

    This EA evaluates the environmental impacts for the proposal to transfer ownership of the undeveloped DP Road Property from the U.S. Department of Energy to Los Alamos County, New Mexico.

  10. Toll road public-private partnerships in Malaysia : using the CLIOS process for policy improvements

    E-Print Network [OSTI]

    Ward, John L., 1977-

    2005-01-01

    Malaysia has relied on private sector provision of toll roads for over twenty years using public- private partnerships (PPPs). While the program has been successful in providing close to 1,800 kilometers of highway in that ...

  11. Office of Student Financial Aid Services 233 Glenbrook Road Unit 4141

    E-Print Network [OSTI]

    Lozano-Robledo, Alvaro

    Office of Student Financial Aid Services 233 Glenbrook Road Unit 4141 Storrs, CT 06269-4141 Phone I-9 explanation, tax forms, etc. Job Descriptions ­ General job descriptions of Class 1, 2, and 3

  12. Department of Earth Sciences South Parks Road, Oxford OX1 3AN

    E-Print Network [OSTI]

    Henderson, Gideon

    Department of Earth Sciences South Parks Road, Oxford OX1 3AN If you are new to the Department offers two schemes which help parents save tax and national insurance on their childcare costs: Salary

  13. On-Road Development of the C-Gas Plus Engine in Heavy-Duty Vehicles

    SciTech Connect (OSTI)

    Not Available

    2003-06-01

    Fact sheet details on-road development of C-Gas Plus natural gas engine in Viking Freight heavy-duty trucks, including emissions, fuel costs, and petroleum displacement.

  14. RCRA Facility Investigation/Remedial Investigation Report for the Grace Road Site (631-22G)

    SciTech Connect (OSTI)

    Palmer, E.

    1998-10-02

    This report summarizes the activities and documents the results of a Resource Conservation and Recovery Act Facility Investigation/Remedial Investigation conducted at Grace Road Site on the Savannah River Site near Aiken, South Carolina.

  15. EA-1941: Boyer-Tillamook Access Road Improvement Project, Tillamook and Yamhill Counties, Oregon

    Broader source: Energy.gov [DOE]

    BPA prepared an EA, FONSI, and Mitigation Action Plan to assess the potential environmental impacts of proposed improvements to 13 miles of access roads for its existing 115-kV Boyer-Tillamook No. 1 Transmission Line in Tillamook and Yamhill counties, Oregon. Associated activities would include resurfacing roads, adding drainage, widening 3 miles of road, constructing 0.1 mile of new road, maintaining culverts, and constructing outlet ditches and retaining walls. In addition, new bridges would be built, and culverts that currently block fish passage for anadromous and resident fish would be replaced. Additional information is available at the project website: http://efw.bpa.gov/environmental_services/Document_Library/Boyer-Tillamook/.

  16. An analysis of the current investment trend in the U.S. toll road sector

    E-Print Network [OSTI]

    Zhang, Xin, S.M. Massachusetts Institute of Technology

    2008-01-01

    In recent years, long term concessions through public-private partnerships (PPP's) in the US toll road sector have emerged and are expected to become a phenomenon in the near future. Up until now, only two large scale ...

  17. Analysis Reveals Impact of Road Grade on Vehicle Energy Use (Fact Sheet)

    SciTech Connect (OSTI)

    Not Available

    2014-04-01

    Findings of study indicate that, on average, road grade could be responsible for 1%-3% of fuel use in light-duty automobiles, with many individual trips impacted by as much as 40%.

  18. 454 Sequencing: The road to the Future ( 7th Annual SFAF Meeting, 2012)

    ScienceCinema (OSTI)

    Knight, James R [Roche

    2013-03-22

    Jim Knight on "454 Sequencing: The Road to the Future" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

  19. What Eco-Driving Techniques Do You Use on the Road?

    Broader source: Energy.gov [DOE]

    What eco-driving techniques do you use on the road? Simple measures such as observing the speed limit, planning your trips, and keeping your tires properly inflated can make a big difference in your savings.

  20. Archaeological survey of the Gosling Road Extension Project in North Central Harris County Texas 

    E-Print Network [OSTI]

    Moore, William

    2015-06-04

    A cultural resources investigation of the Gosling Road Extension project in north-central Harris County was conducted by Brazos Valley Research Associates on June 8 and 12, 1993 for the environmental firm, W. K. Berg & Associates of Houston, Texas...

  1. Director: Dr Nigel Bowles 1A South Parks Road, Oxford, OX1 3UB, United Kingdom

    E-Print Network [OSTI]

    Oxford, University of

    Director: Dr Nigel Bowles 1A South Parks Road, Oxford, OX1 3UB, United Kingdom +44 1865 282 705-First Century America: What Sustains the Ruckus? #12;Wednesday 29 April 17:00-18:30 Abortion in Context: Law

  2. 454 Sequencing: The road to the Future ( 7th Annual SFAF Meeting, 2012)

    SciTech Connect (OSTI)

    Knight, James R [Roche] [Roche

    2012-06-01

    Jim Knight on "454 Sequencing: The Road to the Future" at the 2012 Sequencing, Finishing, Analysis in the Future Meeting held June 5-7, 2012 in Santa Fe, New Mexico.

  3. Road traffic noise modifies behaviour of a keystone species Graeme Shannon a, *

    E-Print Network [OSTI]

    Angeloni, Lisa

    Road traffic noise modifies behaviour of a keystone species Graeme Shannon a, * , Lisa M. Angeloni the influence of traffic noise on foraging and vigilance in a keystone species in North American prairie systems

  4. Elastic properties of Pu metal and Pu-Ga alloys

    SciTech Connect (OSTI)

    Soderlind, P; Landa, A; Klepeis, J E; Suzuki, Y; Migliori, A

    2010-01-05

    We present elastic properties, theoretical and experimental, of Pu metal and Pu-Ga ({delta}) alloys together with ab initio equilibrium equation-of-state for these systems. For the theoretical treatment we employ density-functional theory in conjunction with spin-orbit coupling and orbital polarization for the metal and coherent-potential approximation for the alloys. Pu and Pu-Ga alloys are also investigated experimentally using resonant ultrasound spectroscopy. We show that orbital correlations become more important proceeding from {alpha} {yields} {beta} {yields} {gamma} plutonium, thus suggesting increasing f-electron correlation (localization). For the {delta}-Pu-Ga alloys we find a softening with larger Ga content, i.e., atomic volume, bulk modulus, and elastic constants, suggest a weakened chemical bonding with addition of Ga. Our measurements confirm qualitatively the theory but uncertainties remain when comparing the model with experiments.

  5. Transport properties of InGaAs/GaAs Heterostructures with {delta}-doped quantum wells

    SciTech Connect (OSTI)

    Baidus, N. V.; Vainberg, V. V.; Zvonkov, B. N.; Pylypchuk, A. S. Poroshin, V. N.; Sarbey, O. G.

    2012-05-15

    The lateral transport of electrons in single- and double-well pseudomorphic GaAs/n-InGaAs/GaAs heterostructures with quantum wells 50-100 meV deep and impurity {delta}-layers in the wells, with concentrations in the range 10{sup 11} < N{sub s} < 10{sup 12} cm{sup -2}, has been investigated. Single-well structures with a doped well at the center exhibit a nonmonotonic temperature dependence of the Hall coefficient and an increase in low-temperature electron mobility with an increase in the impurity concentration. The results obtained indicate that the impurity-band electron states play an important role in the conductivity of these structures. Involvement of the impurity band also allows to explain adequately the characteristics of the conductivity of double-well structures; in contrast to single-well structures, band bending caused by asymmetric doping is of great importance. The numerical calculations of conductivity within the model under consideration confirm these suggestions.

  6. Germanium subcells for multijunction GaInP/GaInAs/Ge solar cells

    SciTech Connect (OSTI)

    Kalyuzhnyy, N. A.; Gudovskikh, A. S.; Evstropov, V. V.; Lantratov, V. M.; Mintairov, S. A.; Timoshina, N. Kh.; Shvarts, M. Z.; Andreev, V. M.

    2010-11-15

    Photovoltaic converters based on n-GaInP/n-p-Ge heterostructures grown by the OMVPE under different conditions of formation of the p-n junction are studied. The heterostructures are intended for use as narrow-gap subcells of the GaInP/GaInAs/Ge three-junction solar cells. It is shown that, in Ge p-tn junctions, along with the diffusion mechanism, the tunneling mechanism of the current flow exists; therefore, the two-diode electrical equivalent circuit of the Ge p-n junction is used. The diode parameters are determined for both mechanisms from the analysis of both dark and 'light' current-voltage dependences. It is shown that the elimination of the component of the tunneling current allows one to increase the efficiency of the Ge subcell by {approx}1% with conversion of nonconcentrated solar radiation. The influence of the tunneling current on the efficiency of the Ge-based devices can be in practice reduced to zero at photogenerated current density of {approx}1.5 A/cm{sup 2} due to the use of the concentrated solar radiation.

  7. On-Road Use of Fischer-Tropsch Diesel Blends

    SciTech Connect (OSTI)

    Nigel Clark; Mridul Gautam; Donald Lyons; Chris Atkinson; Wenwei Xie; Paul Norton; Keith Vertin; Stephen Goguen; James Eberhardt

    1999-04-26

    Alternative compression ignition engine fuels are of interest both to reduce emissions and to reduce U.S. petroleum fuel demand. A Malaysian Fischer-Tropsch gas-to-liquid fuel was compared with California No.2 diesel by characterizing emissions from over the road Class 8 tractors with Caterpillar 3176 engines, using a chassis dynamometer and full scale dilution tunnel. The 5-Mile route was employed as the test schedule, with a test weight of 42,000 lb. Levels of oxides of nitrogen (NO{sub x}) were reduced by an average of 12% and particulate matter (PM) by 25% for the Fischer-Tropsch fuel over the California diesel fuel. Another distillate fuel produced catalytically from Fischer-Tropsch products originally derived from natural gas by Mossgas was also compared with 49-state No.2 diesel by characterizing emissions from Detroit Diesel 6V-92 powered transit buses, three of them equipped with catalytic converters and rebuilt engines, and three without. The CBD cycle was employed as the test schedule, with a test weight of 33,050 lb. For those buses with catalytic converters and rebuilt engines, NO x was reduced by 8% and PM was reduced by 31% on average, while for those buses without, NO x was reduced by 5% and PM was reduced by 20% on average. It is concluded that advanced compression ignition fuels from non-petroleum sources can offer environmental advantages in typical line haul and city transit applications.

  8. Chaotic Vibration of a Quarter-Car Model Excited by the Road Surface Profile

    E-Print Network [OSTI]

    Grzegorz Litak; Marek Borowiec; Michael I. Friswell; Kazimierz Szabelski

    2006-01-14

    The Melnikov criterion is used to examine a global homoclinic bifurcation and transition to chaos in the case of a quarter car model excited kinematically by the road surface profile. By analyzing the potential an analytic expression is found for the homoclinic orbit. By introducing an harmonic excitation term and damping as perturbations, the critical Melnikov amplitude of the road surface profile is found, above which the system can vibrate chaotically.

  9. A simplified mechanistic rut depth prediction procedure for low-volume roads 

    E-Print Network [OSTI]

    Yapa, Kashyapa A.S.

    1988-01-01

    A SIMPLIFIED MECHANISTIC RUT DEPTH PREDICTION PROCEDURE FOR LOW-UOLUME ROADS A Thesis by KASHYAPA ABEYSIRIWARDHANA SENARATH YAPA Submitted to the Office of Graduate Studies Texas ASM University in partial fulfillment of the requirements... rt L. Lytt ( an of Committee) D as . Li tie ( ember) Walter L. Bradley (Member) Ja T. . Yao (Head of De tment) December 1988 ABSTRACT A Simplified Mechanistic Rut Depth Prediction Procedure for Low-volume Roads. (December 1988) Kashyapa...

  10. InGaN/GaN multiple-quantum-well light-emitting diodes with a grading InN composition suppressing the Auger recombination

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    ) In conventional InGaN/GaN light-emitting diodes (LEDs), thin InGaN quantum wells are usually adopted to mitigate recombination scales with the third power of the carrier density. As a result, the efficiency droop of the Auger recombination severely limits the LED performance. Here, we proposed and showed wide InGaN quantum wells

  11. Current crowding in GaInN / GaN LEDs grown on insulating substrates X. Guo, E. F. Schubert and J. Jahns

    E-Print Network [OSTI]

    Jahns, Jürgen

    Current crowding in GaInN / GaN LEDs grown on insulating substrates X. Guo, E. F. Schubert and J. Jahns Current crowding in mesa-structure GaInN/GaN light-emitting diodes (LEDs) grown on insulating and a saturation of the optical output power at high injection currents. It is shown that the optical power

  12. Investigation of the effect of temperature during off-state degradation of AlGaN/GaN High Electron Mobility Transistors

    E-Print Network [OSTI]

    Florida, University of

    , creating both electron traps and increasing electron tunneling through the defect states [4Investigation of the effect of temperature during off-state degradation of AlGaN/GaN High Electron 2011 a b s t r a c t AlGaN/GaN High Electron Mobility Transistors were found to exhibit a negative

  13. Mesoscopic photovoltaic effect in GaAs/Ga1-xAlxAs Aharonov-Bohm rings L. Angers, A. Chepelianskii, R. Deblock, B. Reulet, and H. Bouchiat

    E-Print Network [OSTI]

    Shepelyansky, Dima

    Mesoscopic photovoltaic effect in GaAs/Ga1-xAlxAs Aharonov-Bohm rings L. Angers, A. Chepelianskii specific dc voltage. We have investigated this photovoltaic PV effect on GaAs/Ga1-xAlxAs Aharonov is generally done by measuring the dc induced signal sometimes called photovoltaic effect which has also given

  14. Determination of two-dimensional electron and hole gas carriers in AlGaN/GaN/AlN heterostructures grown by Metal

    E-Print Network [OSTI]

    Ozbay, Ekmel

    between GaN and a sapphire substrate, the dislocation scattering mechanism and the electron spillover

  15. ELLESMERE ROAD ELLESMERE ROAD

    E-Print Network [OSTI]

    Toronto, University of

    Up Area Emergency Phones Parking Lots Accessible ParkingPARKING Building Index AA - Arts PA - Vistor Parking Lot A D4 PB - Permit Lot B D5 PC - Permit/Accessible Parking Lot C C5 PD - Permit Parking Lot D B5 PE - Dept. Visitor Parking Lot E B3 PF - Vistor Parking Lot F C2 PG - Permit Parking Lot

  16. Atomistic description of the electronic structure of InxGa1xAs alloys and InAsGaAs superlattices

    E-Print Network [OSTI]

    Kent, Paul

    quantum-wells15,20 (InxGa1 xAs)n /InP on InP and (InxGa1 xAs)n /GaAs on GaAs, and v GaAs-embedded InAs quantum dots.21­23 We wish to provide a uniform the- oretical description of the electronic structure-period dependence of the band offsets and interband transitions of InAs/GaAs systems on InP and GaAs substrates. DOI

  17. Improved hole distribution in InGaN/GaN light-emitting diodes with graded thickness quantum barriers

    E-Print Network [OSTI]

    Demir, Hilmi Volkan

    is 48.3%. Moreover, the light output power was enhanced from 770 mW for the ETQB LEDs to 870 m; accepted 3 June 2013; published online 19 June 2013) InGaN/GaN light-emitting diodes (LEDs) with graded , which is much smaller than that of the conventional equal-thickness quantum barriers (ETQB) LED, which

  18. Low-frequency noise in GaNAlGaN heterostructure field-effect transistors at cryogenic temperatures

    E-Print Network [OSTI]

    Pala, Nezih

    that the 1/f noise in GaN/AlGaN HFETs might be caused by electron tunneling from the channel to the traps was practically independent of the frequency of analysis. The model linking this maximum to the electron tunneling Department of Electrical, Computer, and Systems Engineering and Center for Integrated Electronics

  19. Development of GaAs/Si and GaAs/Si monolithic structures for future space solar cells

    SciTech Connect (OSTI)

    Spitzer, M.B.; Vernon, S.M.; Wolfson, R.G.; Tobin, S.P.

    1984-01-01

    The results of heteroepitaxial growth of GaAs and GaAlAs directly on Si are presented, and applications to new cell structures are suggested. The novel feature is the elimination of a Ge lattice transition region. This feature not only reduces the cost of substrate preparation, but also makes possible the fabrication of high efficiency monolithic cascade structures. All films to be discussed were grown by organometallic chemical vapor deposition at atmospheric pressure. This process yielded reproducible, large-area films of GaAs, grown directly on Si, that are tightly adherent and smooth, and are characterized by a defect density of 5 x 10(6) power/sq cm. Preliminary studies indicate that GaAlAs can also be grown in this way. A number of promising applications are suggested. Certainly these substrates are ideal for low-weight GaAs space solar ells. For very high efficiency, the absence of Ge makes the technology attractive for GaAlAs/Si monolithic cascades, in which the Si substrates would first be provided with a suitable p/n junction. An evaluation of a three bandgap cascade consisting of appropriately designed GaAlAs/GaAs/Si layers is also presented.

  20. Wavelength-resolved low-frequency noise of GaInN/GaN green light emitting diodes

    E-Print Network [OSTI]

    Wetzel, Christian M.

    Wavelength-resolved low-frequency noise of GaInN/GaN green light emitting diodes S. L. Rumyantseva well light emitting diodes. The light intensity noise was measured as a function of wavelength within the light emitting diode spectral emission line. The spectral noise density is found to increase

  1. GaAs-based self-aligned laser incorporating InGaP opto-electronic confinement layer

    E-Print Network [OSTI]

    be well suited for exploitation of long wavelength quantum dot and dilute nitride technology, resulting in single lateral mode emission from an In0.17Ga0.83As double quantum well laser. Introduction: Lasers based on the GaAs materials system offer advan- tages over their InP counterparts, such as the use

  2. Improved performance of In,,Ga...As/GaAs quantum dot solar cells via light scattering by nanoparticles

    E-Print Network [OSTI]

    Yu, Edward T.

    of QDs in the context of our work is attractive for achieving long wavelength absorption in solar cells enhancement at all infrared wave- lengths in the device photocurrent spectrum. Epitaxial layer structuresImproved performance of In,,Ga...As/GaAs quantum dot solar cells via light scattering

  3. Output Harmonic Termination Techniques for AlGaN/GaN HEMT Power Amplifiers Using Active Integrated Antenna Approach

    E-Print Network [OSTI]

    Itoh, Tatsuo

    Output Harmonic Termination Techniques for AlGaN/GaN HEMT Power Amplifiers Using Active Integrated 1200, Los Angeles, CA 90045 Abstract -- In this paper, effects of output harmonic terminations on PAE termination, we observe a substantial increase in PAE and output power. Further, we demonstrate the high

  4. SnO2 functionalized AlGaN/GaN high electron mobility transistor for hydrogen sensing applications

    E-Print Network [OSTI]

    Florida, University of

    for spacecraft and other long-term sensing applications. However, hydrogen is a dangerous gas for storage for monitoring leakage of hydrogen storage equipment and fuel tanks for spacecraft and hydrogen fuel cellSnO2 functionalized AlGaN/GaN high electron mobility transistor for hydrogen sensing applications

  5. Mn-doped Ga(As,P) and (Al,Ga)As ferromagnetic semiconductors: Electronic structure calculations 

    E-Print Network [OSTI]

    Masek, J.; Kudrnovsky, J.; Maca, F.; Sinova, Jairo; MacDonald, A. H.; Campion, R. P.; Gallagher, B. L.; Jungwirth, T.

    2007-01-01

    A remarkable progress towards functional ferromagnetic semiconductor materials for spintronics has been achieved in p-type (Ga,Mn)As. Robust hole-mediated ferromagnetism has, however, been observed also in other III-V hosts such as antimonides, Ga...

  6. DESIGN, GROWTH, FABRICATION AND CHARACTERIZATION OF HIGH-BAND GAP InGaN/GaN SOLAR CELLS

    E-Print Network [OSTI]

    Honsberg, Christiana

    photovoltaic efficiency of 39% at 236 suns is achieved by a triple-junction GaInP- GaInAs-Ge tandem solar cell [1]. While the achievable efficiency of triple-junction tandem solar cells is restricted to about 40% [2], modeling results show that a tandem solar cell of five junctions or greater, or an equivalent

  7. Progress toward technology transition of GaInP{sub 2}/GaAs/Ge multijunction solar cells

    SciTech Connect (OSTI)

    Keener, D.N.; Marvin, D.C.; Brinker, D.J.; Curtis, H.B.; Price, P.M.

    1997-12-31

    The objective of the joint WL/PL/NASA Multijunction Solar Cell Manufacturing Technology (ManTech) Program is to scale up high efficiency GaInP{sub 2}/GaAs/Ge multijunction solar cells to production size, quantity, and yield while limiting the production cost/Watt ($/W) to 15% over GaAs cells. Progress made by the program contractors, Spectrolab and TECSTAR, include, respectively, best cell efficiencies of 25.76% and 24.7% and establishment of 24.2% and 23.8% lot average efficiency baseline designs. The paper also presents side-by-side testing results collected by Phillips Laboratory and NASA Lewis on Phase 1 deliverable cells, which shows compliance with program objectives. Cell performance, pre- and post-radiation, and temperature coefficient results on initial production GaInP{sub 2}/GaAs/Ge solar cells will be presented.

  8. Road Rash: Ecological and Social Impacts of Road Networks on First Nations Kneeshaw, D.D., Larouche, M., Asselin, H., Adam, M.-C.,

    E-Print Network [OSTI]

    Asselin, Hugo

    communities are confronted with many environmental and social issues associated with natural resource communities (Aboriginal or not). The effects of road networks linked to resources extraction continue regions for the exploitation of natural resources (primarily wood, minerals and fossil fuels). However

  9. Ferromagnetism in undoped One-dimensional GaN Nanowires

    SciTech Connect (OSTI)

    Jeganathan, K. E-mail: jagan@physics.bdu.ac.in; Purushothaman, V.; Debnath, R.; Arumugam, S.

    2014-05-15

    We report an intrinsic ferromagnetism in vertical aligned GaN nanowires (NW) fabricated by molecular beam epitaxy without any external catalyst. The magnetization saturates at ?0.75 × emu/gm with the applied field of 3000 Oe for the NWs grown under the low-Gallium flux of 2.4 × 10{sup ?8} mbar. Despite a drop in saturation magnetization, narrow hysteresis loop remains intact regardless of Gallium flux. Magnetization in vertical standing GaN NWs is consistent with the spectral analysis of low-temperature photoluminescence pertaining to Ga-vacancies associated structural defects at the nanoscale.

  10. Characterization of Zns-GaP Naon-composites

    SciTech Connect (OSTI)

    Todd, V.

    1993-12-09

    It proved possible to produce consistent, high-quality nanocrystalline ZnS powders with grain sizes as small as 8 nm. These powders are nano-porous and are readily impregnated with GaP precursor, although inconsistently. Both crystal structure and small grain size of the ZnS can be maintained through the use of GaP. Heat treatment of the impregnated powders results in a ZnS-GaP composite structure where the grain sizes of the phases are on the order of 10--20 nm. Conventional powder processing should be able to produce optically dense ceramic compacts with improved mechanical properties and suitable IR transmission.

  11. Indium distribution at the interfaces of (Ga,In)(N,As)/GaAs quantum wells

    SciTech Connect (OSTI)

    Luna, E.; Ishikawa, F.; Batista, P. D.; Trampert, A. [Paul-Drude-Institut fuer Festkoerperelektronik, Hausvogteiplatz 5-7, D-10117, Berlin (Germany)

    2008-04-07

    The indium distribution across (Ga,In)(N,As) quantum wells is determined by using transmission electron microscopy techniques. Inside the quantum well, the indium distribution is well described by Muraki's segregation model; however, it fails in reflecting the concentration at the interfaces. To describe them, we propose a sigmoidal law which defines the smooth variation of the indium concentration with the position and provides a systematic and quantitative characterization of the interfaces. The thermal stability of the interfaces and their interplay with segregation effects are discussed. A connection between the high thermal robustness of the interfaces and the inherent thermodynamic miscibility gap of the alloy is suggested.

  12. Local Structures and Interface Morphology of InGaAsN Thin Films Grown on GaAs

    SciTech Connect (OSTI)

    Allerman, A.A.; Chen, J.G.; Geisz, J.F.; Huang, S.; Hulbert, S.L.; Jones, E.D.; Kao, Y.H.; Kurtz, S.; Kurtz, S.R.; Olson, J.M.; Soo, Y.L.

    1999-02-23

    The compound semiconductor system InGaAsN exhibits many intriguing properties which are particularly useful for the development of innovative high efficiency thin film solar cells and long wavelength lasers. The bandgap in these semiconductors can be varied by controlling the content of N and In and the thin films can yet be lattice-matched to GaAs. In the present work, x-ray absorption fine structure (XAFS) and grazing incidence x-ray scattering (GIXS) techniques have been employed to probe the local environment surrounding both N and In atoms as well as the interface morphology of InGaAsN thin films epitaxially grown on GaAs. The soft x-ray XAFS results around nitrogen K-edge reveal that N is in the sp{sup 3} hybridized bonding configuration in InGaAsN and GaAsN, suggesting that N impurities most likely substitute for As sites in these two compounds. The results of In K-edge XAFS suggest a possible trend of a slightly larger coordination number of As nearest neighbors around In atoms in InGaAsN samples with a narrower bandgap whereas the In-As interatomic distance remains practically the same as in InAs within the experimental uncertainties. These results combined suggest that N-substitution of the As sites plays an important role of bandgap-narrowing while in the meantime counteracting the compressive strain caused by In-doping. Grazing incidence x-ray scattering (GIXS) experiments verify that InGaAsN thin films can indeed form very smooth interfaces with GaAs yielding an average interfacial roughness of 5-20{angstrom}.

  13. Structural and optical properties of GaAs-based heterostructures with Ge and Ge/InGaAs quantum wells

    SciTech Connect (OSTI)

    Aleshkin, V. Ya.; Dubinov, A. A., E-mail: sanya@ipm.sci-nnov.ru; Drozdov, M. N. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Zvonkov, B. N. [Nizhni Novgorod State University, Research Physical Technical Institute (Russian Federation); Kudryavtsev, K. E.; Tonkikh, A. A.; Yablonskiy, A. N. [Russian Academy of Sciences, Institute for Physics of Microstructures (Russian Federation); Werner, P. [Max Planck Institute of Microstructure Physics (Germany)

    2013-05-15

    GaAs-based heterostructures with Ge and Ge/InGaAs quantum wells are grown by laser-assisted sputtering. Structural and optical studies of the heterostructures are carried out. A broad photoluminescence line is observed in the wavelength range from 1300 to 1650 nm. The line corresponds to indirect transitions in the momentum space of the Ge quantum wells and to transitions between the In{sub 0.28}Ga{sub 0.72}As and Ge layers, indirect in coordinate space, but direct in momentum space.

  14. Electrical spin injection using GaCrN in a GaN based spin light emitting diode

    SciTech Connect (OSTI)

    Banerjee, D.; Ganguly, S.; Saha, D.; Adari, R.; Sankaranarayan, S.; Kumar, A.; Aldhaheri, R. W.; Hussain, M. A.; Balamesh, A. S.

    2013-12-09

    We have demonstrated electrical spin-injection from GaCrN dilute magnetic semiconductor (DMS) in a GaN-based spin light emitting diode (spin-LED). The remanent in-plane magnetization of the thin-film semiconducting ferromagnet has been used for introducing the spin polarized electrons into the non-magnetic InGaN quantum well. The output circular polarization obtained from the spin-LED closely follows the normalized in-plane magnetization curve of the DMS. A saturation circular polarization of ?2.5% is obtained at 200?K.

  15. Effects of light illumination on electron velocity of AlGaN/GaN heterostructures under high electric field

    SciTech Connect (OSTI)

    Guo, Lei; Yang, Xuelin Cheng, Jianpeng; Sang, Ling; Xu, Fujun; Tang, Ning; Feng, Zhihong; Lv, Yuanjie; Wang, Xinqiang; Shen, B.; Ge, Weikun

    2014-12-15

    We have investigated the variation of electron velocity in AlGaN/GaN heterostructures depending on illuminating light intensity and wavelength. It is shown that the electron velocity at high electric field increases under above-band light illumination. This electron velocity enhancement is found to be related to the photo-generated cold holes which interact with hot electrons and thus accelerate the energy relaxation at high electric field. The results suggest an alternative way to improve the electron energy relaxation rate and hence the electron velocity in GaN based heterostructures.

  16. High-power InGaAs/GaAs quantum-well laser with enhanced broad spectrum of stimulated emission

    SciTech Connect (OSTI)

    Wang, Huolei; Yu, Hongyan; Zhou, Xuliang; Kan, Qiang; Yuan, Lijun; Wang, Wei; Pan, Jiaoqing, E-mail: jqpan@semi.ac.cn [Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Science, Beijing 100083 (China); Chen, Weixi [State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing 100871 (China); Ding, Ying, E-mail: Ying.Ding@glasgow.ac.uk [School of Engineering, University of Glasgow, Glasgow G12 8LT (United Kingdom)

    2014-10-06

    We report the demonstration of an InGaAs/GaAs quantum well (QW) broadband stimulated emission laser with a structure that integrated a GaAs tunnel junction with two QW active regions. The laser exhibits ultrabroad lasing spectral coverage of ?51?nm at a center wavelength of 1060?nm with a total emission power of 790 mW, corresponding to a high average spectral power density of 15.5 mW/nm, under pulsed current conditions. Compared to traditional lasers, this laser with an asymmetric separate-confinement heterostructure shows broader lasing bandwidth and higher spectral power density.

  17. Size-Resolved Particle Number and Volume Emission Factors for On-Road Gasoline and Diesel Motor Vehicles

    E-Print Network [OSTI]

    Ban-Weiss, George A.

    2009-01-01

    losses when sampling diesel aerosol: A quality assurancefrom on-road gasoline and diesel vehicles. AtmosphericSource apportionment of diesel and spark ignition exhaust

  18. 211 Quarry Road, Suite 201, Palo Alto, CA 94304 (650) 725-8400 http://healthlibrary.stanford.edu

    E-Print Network [OSTI]

    Kay, Mark A.

    211 Quarry Road, Suite 201, Palo Alto, CA 94304 (650) 725-8400 · http is my tax-deductible contribution of $______________ Payment Method: Check enclosed Visa Master

  19. Methods for fatigue testing off-road bicycle handlebars based on assembly effects using two different stem designs

    E-Print Network [OSTI]

    McKenna, Sean P; Hill, Michael R; Hull, Maury L

    2003-01-01

    AND EVALUATION [2] “Trek Bicycle Corp. Announces Recall ofSafety Requirements for Bicycles, International Organizationfor Fatigue Testing Off-Road Bicycle Handlebars Based on

  20. Linear and nonlinear optical properties of GaAs/Al{sub x}Ga{sub 1?x}As/GaAs/Al{sub y}Ga{sub 1?y}As multi-shell spherical quantum dot

    SciTech Connect (OSTI)

    Emre Kavruk, Ahmet E-mail: aekavruk@gmail.com; Koc, Fatih; Sahin, Mehmet E-mail: mehsahin@gmail.com

    2013-11-14

    In this work, the optical properties of GaAs/Al{sub x}Ga{sub 1?x}As/GaAs/Al{sub y}Ga{sub 1?y}As multi-shell quantum dot heterostructure have been studied as a function of Al doping concentrations for cases with and without a hydrogenic donor atom. It has been observed that the absorption coefficient strength and/or resonant absorption wavelength can be adjusted by changing the Al content of inner-barrier and/or outer-barrier regions. Besides, it has been shown that the donor atom has an important effect on the control of the electronic and optical properties of the structure. The results have been presented as a function of the Al contents of the inner-barrier x and outer-barrier y regions and probable physical reasons have been discussed.

  1. Electrical degradation mechanisms of RF power GaAs PHEMTs

    E-Print Network [OSTI]

    Villanueva, Anita A. (Anita Ariel), 1978-

    2007-01-01

    GaAs Pseudomorphic High-Electron Mobility Transistors (PHEMTs) are widely used in RF power applications. Since these devices typically operate at high power levels and under high voltage biasing, their electrical reliability ...

  2. Evaporation-based Ge/.sup.68 Ga Separation

    DOE Patents [OSTI]

    Mirzadeh, Saed (Albuquerque, NM); Whipple, Richard E. (Los Alamos, NM); Grant, Patrick M. (Los Alamos, NM); O'Brien, Jr., Harold A. (Los Alamos, NM)

    1981-01-01

    Micro concentrations of .sup.68 Ga in secular equilibrium with .sup.68 Ge in strong aqueous HCl solution may readily be separated in ionic form from the .sup.68 Ge for biomedical use by evaporating the solution to dryness and then leaching the .sup.68 Ga from the container walls with dilute aqueous solutions of HCl or NaCl. The chloro-germanide produced during the evaporation may be quantitatively recovered to be used again as a source of .sup.68 Ga. If the solution is distilled to remove any oxidizing agents which may be present as impurities, the separation factor may easily exceed 10.sup.5. The separation is easily completed and the .sup.68 Ga made available in ionic form in 30 minutes or less.

  3. The road to MOND--a novel perspective

    E-Print Network [OSTI]

    Milgrom, Mordehai

    2015-01-01

    Accepting that galactic mass discrepancies are due to modified dynamics, I show why it is specifically the MOND paradigm that is pointed to cogently. MOND is thus discussed here as a special case of a larger class of modified dynamics theories whereby galactic systems with large mass discrepancies are described by scale-invariant dynamics. This is a novel presentation that uses more recent, after-the-fact insights and data (largely predicted beforehand by MOND). Starting from a purist set of tenets, I follow the path that leads specifically to the MOND basic tenets. The main signposts are: (i) Space-time scale invariance underlies the dynamics of systems with large mass discrepancies. (ii) In these dynamics, $G$ must be replaced by a single "scale-invariant" gravitational constant, Q0 (in MOND, Q0=A0=Ga0, where a0 is MOND's acceleration constant). (iii) Universality of free fall points to the constant q0=Q0/G as the boundary between the G-controlled, standard dynamics, and the Q0-controlled, scale-invariant d...

  4. Low temperature carrier redistribution dynamics in InGaN/GaN quantum wells

    SciTech Connect (OSTI)

    Badcock, T. J., E-mail: Thomas.badcock@crl.toshiba.co.uk; Dawson, P.; Davies, M. J. [School of Physics and Astronomy, Photon Science Institute, Alan Turing Building, University of Manchester, Manchester M13 9PL (United Kingdom); Kappers, M. J.; Massabuau, F. C.-P.; Oehler, F.; Oliver, R. A.; Humphreys, C. J. [Department of Materials Science and Metallurgy, 27 Charles Babbage Road, University of Cambridge, Cambridge CB3 0FS (United Kingdom)

    2014-03-21

    We have studied the carrier recombination dynamics in an InGaN/GaN multiple quantum well structure as a function of emission energy and excitation density between temperatures of 10?K and 100?K. Under relatively low levels of excitation, the photoluminescence (PL) intensity and decay time of emission on the high energy side of the luminescence spectrum decrease strongly between 10?K and 50?K. In contrast, for emission detected on the low energy side of the spectrum, the PL intensity and decay time increase over the same temperature range. These results are consistent with a thermally activated carrier redistribution process in which the (temperature dependent) average timescale for carrier transfer into or out of a localised state depends on the energy of the given state. Thus, the transfer time out of shallow, weakly localised states is considerably shorter than the arrival time into more deeply localised states. This picture is consistent with carriers hopping between localisation sites in an uncorrelated disorder potential where the density of localised states decreases with increasing localisation depth, e.g., a exponential or Gaussian distribution resulting from random alloy disorder. Under significantly higher levels of excitation, the increased occupation fraction of the localised states results in a greater average separation distance between unoccupied localised states, causing a suppression of the spectral and dynamic signatures of the hopping transfer of carriers.

  5. Green (In,Ga,Al)P-GaP light-emitting diodes grown on high-index GaAs surfaces

    SciTech Connect (OSTI)

    Ledentsov, N. N., E-mail: nikolay.ledentsov@v-i-systems.com; Shchukin, V. A. [VI Systems GmbH, Hardenbergstr. 7, Berlin D-10623 (Germany); Lyytikäinen, J.; Okhotnikov, O. [Optoelectronics Research Centre, Tampere University of Technology, Tampere FI-33720 (Finland); Shernyakov, Yu. M.; Payusov, A. S.; Gordeev, N. Yu.; Maximov, M. V. [A. F. Ioffe Physical Technical Institute of the Russian Academy of Sciences, Politekhnicheskaya 26, St. Petersburg 194021 (Russian Federation); Schlichting, S.; Nippert, F.; Hoffmann, A. [Institut für Festkörperphysik, Technische Universität Berlin, Hardenbergstrasse 36, Berlin D-10623 (Germany)

    2014-11-03

    We report on green (550–560?nm) electroluminescence (EL) from (Al{sub 0.5}Ga{sub 0.5}){sub 0.5}In{sub 0.5}P-(Al{sub 0.8}Ga{sub 0.2}){sub 0.5}In{sub 0.5}P double p-i-n heterostructures with monolayer-scale GaP insertions in the cladding layers and light-emitting diodes based thereupon. The structures are grown side-by-side on high-index and (100) GaAs substrates by molecular beam epitaxy. At moderate current densities (?500?A/cm{sup 2}), the EL intensity of the structures is comparable for all substrate orientations. Opposite to the (100)-grown strictures, the EL spectra of (211) and (311)-grown devices are shifted towards shorter wavelengths (?550?nm at room temperature). At high current densities (>1?kA/cm{sup 2}), a much higher EL intensity is achieved for the devices grown on high-index substrates. The integrated intensity of (311)-grown structures gradually saturates at current densities above 4?kA/cm{sup 2}, whereas no saturation is revealed for (211)-grown structures up to the current densities above 14?kA/cm{sup 2}. We attribute the effect to the surface orientation-dependent engineering of the GaP band structure, which prevents the escape of the nonequilibrium electrons into the indirect conduction band minima of the p-doped (Al{sub 0.8}Ga{sub 0.2}){sub 0.5}In{sub 0.5}P cladding layers.

  6. Influence of stress on optical transitions in GaN nanorods containing a single InGaN/GaN quantum disk

    SciTech Connect (OSTI)

    Zhuang, Y. D.; Shields, P. A.; Allsopp, D. W. E., E-mail: d.allsopp@bath.ac.uk [Department of Electronic and Electrical Engineering, University of Bath, Bath BA2 7AY (United Kingdom); Bruckbauer, J.; Edwards, P. R.; Martin, R. W. [Department of Physics, SUPA, University of Strathclyde, Glasgow G4 0NG (United Kingdom)

    2014-11-07

    Cathodoluminescence (CL) hyperspectral imaging has been performed on GaN nanorods containing a single InGaN quantum disk (SQD) with controlled variations in excitation conditions. Two different nanorod diameters (200 and 280?nm) have been considered. Systematic changes in the CL spectra from the SQD were observed as the accelerating voltage of the electron beam and its position of incidence are varied. It is shown that the dominant optical transition in the SQD varies across the nanorod as a result of interplay between the contributions of the deformation potential and the quantum-confined Stark effect to the transition energy as consequence of radial variation in the pseudomorphic strain.

  7. High intensity low temperature (HILT) performance of space concentrator GaInP/GaInAs/Ge MJ SCs

    SciTech Connect (OSTI)

    Shvarts, Maxim Z., E-mail: shvarts@scell.ioffe.ru; Kalyuzhnyy, Nikolay A.; Mintairov, Sergey A.; Soluyanov, Andrei A.; Timoshina, Nailya Kh. [Ioffe Physical-Technical Institute, 26 Polytekhnicheskaya str., St.-Petersburg, 194021 (Russian Federation); Gudovskikh, Alexander S. [Saint-Petersburg Academic University - Nanotechnology Research and Education Centre RAS, St. Petersburg, 194021 (Russian Federation); Luque, Antonio [Ioffe Physical-Technical Institute, 26 Polytekhnicheskaya str., St.-Petersburg, 194021, Russia and Instituto de Energia Solar, Universidad Politecnica de Madrid, Madrid (Spain)

    2014-09-26

    In the work, the results of an investigation of GaInP/GaInAs/Ge MJ SCs intended for converting concentrated solar radiation, when operating at low temperatures (down to ?190 °C) are presented. A kink of the cell I-V characteristic has been observed in the region close to V{sub oc} starting from ?20°C at operation under concentrated sunlight. The causes for its occurrence have been analyzed and the reasons for formation of a built-in potential barrier for majority charge carriers at the n-GaInP/n-Ge isotype hetero-interface are discussed. The effect of charge carrier transport in n-GaInP/n-pGe heterostructures on MJ SC output characteristics at low temperatures has been studied including EL technique.

  8. The origin and reduction of switching noise in GaAs/AlGaAs lateral gated devices

    E-Print Network [OSTI]

    Davies, John H.

    to cryogenic temperature with all gates grounded to the substrate to protect against electrostatic effects in AlGaAs: electrons `freeze' into deep traps ­ DX centres ­ below about 150 K. The occupation of donors

  9. Design and fabrication of InGaN/GaN heterojunction bipolar transistors for microwave power amplifiers

    E-Print Network [OSTI]

    Keogh, David Martin

    2006-01-01

    assuming the material growth technology allows for all ofand a relatively immature growth technology, as well as theof the art for InGaN growth technology. Epitaxial growth of

  10. Polarization field engineering of GaN/AlN/AlGaN superlattices for enhanced thermoelectric properties

    SciTech Connect (OSTI)

    Sztein, Alexander, E-mail: asztein@umail.ucsb.edu [Materials Department, University of California, Santa Barbara, California 93106 (United States); Bowers, John E.; DenBaars, Steven P.; Nakamura, Shuji [Materials Department, University of California, Santa Barbara, California 93106 (United States); Electrical and Computer Engineering Department, University of California, Santa Barbara, California 93106 (United States)

    2014-01-27

    A novel polarization field engineering based strategy to simultaneously achieve high electrical conductivity and low thermal conductivity in thermoelectric materials is demonstrated. Polarization based electric fields are used to confine electrons into two-dimensional electron gases in GaN/AlN/Al{sub 0.2}Ga{sub 0.8}N superlattices, resulting in improved electron mobilities as high as 1176 cm{sup 2}/Vs and in-plane thermal conductivity as low as 8.9?W/mK. The resulting room temperature ZT values reach 0.08, a factor of four higher than InGaN and twelve higher than GaN, demonstrating the potential benefits of this polarization based engineering strategy for improving the ZT and efficiencies of thermoelectric materials.

  11. Si-CMOS-Like Integration of AlGaN/GaN Dielectric-Gated High-Electron-Mobility Transistors 

    E-Print Network [OSTI]

    Johnson, Derek Wade

    2014-07-31

    production is projected to consume ~100,000 wafers per year by 2015 (Yole Development, “Power GaN – 2012 Edition”), this manufacturing breakthrough represents potential savings of ~$17 million per year....

  12. Characterization of the gate oxide of an AlGaN/GaN high electron mobility transistor

    E-Print Network [OSTI]

    Florida, University of

    2011; published online 21 March 2011 A subnanometer thick interfacial oxide layer present between used to characterize a Ni/AlGaN interfacial oxide layer with subnanometer thickness. The semiconducting

  13. The first principle study of Ni{sub 2}ScGa and Ni{sub 2}TiGa

    SciTech Connect (OSTI)

    Özduran, Mustafa; Turgut, Kemal; Arikan, Nihat; ?yigör, Ahmet; Candan, Abdullah

    2014-10-06

    We computed the electronic structure, elastic moduli, vibrational properties, and Ni{sub 2}TiGa and Ni{sub 2}ScGa alloys in the cubic L2{sub 1} structure. The obtained equilibrium lattice constants of these alloys are in good agreement with available data. In cubic systems, there are three independent elastic constants, namely C{sub 11}, C{sub 12} and C{sub 44}. We calculated elastic constants in L2{sub 1} structure for Ni{sub 2}TiGa and Ni{sub 2}ScGa using the energy-strain method. The electronic band structure, total and partial density of states for these alloys were investigated within density functional theory using the plane-wave pseudopotential method implemented in Quantum-Espresso program package. From band structure, total and projected density of states, we observed metallic characters of these compounds. The electronic calculation indicate that the predominant contributions of the density of states at Fermi level come from the Ni 3d states and Sc 3d states for Ni{sub 2}TiGa, Ni 3d states and Sc 3d states for Ni{sub 2}ScGa. The computed density of states at Fermi energy are 2.22 states/eV Cell for Ni{sub 2}TiGa, 0.76 states/eV Cell for Ni{sub 2}ScGa. The vibrational properties were obtained using a linear response in the framework at the density functional perturbation theory. For the alloys, the results show that the L2{sub 1} phase is unstable since the phonon calculations have imagine modes.

  14. Optical investigation of InAs quantum dots inserted in AlGaAs/GaAs modulation doped heterostructure

    SciTech Connect (OSTI)

    Khmissi, H.; Baira, M.; Bouzaieene, L.; Saidi, F.; Maaref, H. [Laboratoire de Micro-optoelectronique et Nanostructures, Universite de Monastir (Tunisia); Sfaxi, L. [Laboratoire de Micro-optoelectronique et Nanostructures, Universite de Monastir (Tunisia); Universite de Sousse Faculte des Sciences de Monastir, Avenue de l'Environnement 5019 Monastir (Tunisia); Bru-Chevallier, C. [Institut des Nanotechnologies de Lyon (INL), CNRS UMR-5270, INSA-LYON, 7, Avenue Jean Capelle, Bat. Blaise Pascal, 69621 Villeurbanne (France)

    2011-03-01

    Optical properties of InAs quantum dots (QDs) inserted in AlGaAs/GaAs modulation doped heterostructure are investigated. To study the effect of carrier transfer behavior on the luminescence of self-assembled quantum dots, a series of sample has been prepared using molecular beam epitaxy (Riber 32 system) in which we have varied the thickness separating the delta dopage and the InAs quantum dots layer. Photoluminescence spectra show the existence of two peaks that can be attributed to transition energies from the ground state (E{sub 1}-HH{sub 1}) and the first excited state (E{sub 2}-HH{sub 2}). Two antagonist effects have been observed, a blue shift of the emission energies result from electron transferred from the AlGaAs/GaAs heterojunction to the InAs quantum dots and a red shift caused by the quantum confined Stark effect due to the internal electric field existing In the AlGaAs/GaAs heterojunction.

  15. Effects of high-temperature AIN buffer on the microstructure of AlGaN/GaN HEMTs

    SciTech Connect (OSTI)

    Coerekci, S.; Oeztuerk, M. K.; Yu, Hongbo; Cakmak, M.; Oezcelik, S.; Oezbay, E.

    2013-06-15

    Effects on AlGaN/GaN high-electron-mobility transistor structure of a high-temperature AlN buffer on sapphire substrate have been studied by high-resolution x-ray diffraction and atomic force microscopy techniques. The buffer improves the microstructural quality of GaN epilayer and reduces approximately one order of magnitude the edge-type threading dislocation density. As expected, the buffer also leads an atomically flat surface with a low root-mean-square of 0.25 nm and a step termination density in the range of 10{sup 8} cm{sup -2}. Due to the high-temperature buffer layer, no change on the strain character of the GaN and AlGaN epitaxial layers has been observed. Both epilayers exhibit compressive strain in parallel to the growth direction and tensile strain in perpendicular to the growth direction. However, an high-temperature AlN buffer layer on sapphire substrate in the HEMT structure reduces the tensile stress in the AlGaN layer.

  16. Road-corridor planning in the EIA procedure in Spain. A review of case studies

    SciTech Connect (OSTI)

    Loro, Manuel [Department of Urban and Regional Planning and Environment, Civil Engineering School, Universidad Politécnica de Madrid, Prof. Aranguren s Transport Research Centre Universidad Politécnica de Madrid, ETSI Caminos, Canales y Puertos, Prof. Aranguren s Centro de investigación del transporte, TRANSyT-UPM, ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Prof. Aranguren s Arce, Rosa M. [Department of Urban and Regional Planning and Environment, Civil Engineering School, Universidad Politécnica de Madrid, Prof. Aranguren s Transport Research Centre Universidad Politécnica de Madrid, ETSI Caminos, Canales y Puertos, Prof. Aranguren s Centro de investigación del transporte, TRANSyT-UPM, ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Prof. Aranguren s Ortega, Emilio [Transport Research Centre Universidad Politécnica de Madrid, ETSI Caminos, Canales y Puertos, Prof. Aranguren s Centro de investigación del transporte, TRANSyT-UPM, ETSI Caminos, Canales y Puertos, Universidad Politécnica de Madrid, Prof. Aranguren s Department of Construction and Rural Roads, Forestry Engineering School, Universidad Politécnica de Madrid, Ciudad Universitaria s and others

    2014-01-15

    The assessment of different alternatives in road-corridor planning must be based on a number of well-defined territorial variables that serve as decision making criteria, and this requires a high-quality preliminary environmental assessment study. In Spain the formal specifications for the technical requirements stipulate the constraints that must be considered in the early stages of defining road corridors, but not how they should be analyzed and ranked. As part of the feasibility study of a new road definition, the most common methodology is to establish different levels of Territorial Carrying Capacity (TCC) in the study area in order to summarize the territorial variables on thematic maps and to ease the tracing process of road-corridor layout alternatives. This paper explores the variables used in 22 road-construction projects conducted by the Ministry of Public Works that were subject to the Spanish EIA regulation and published between 2006 and 2008. The aim was to evaluate the quality of the methods applied and the homogeneity and suitability of the variables used for defining the TCC. The variables were clustered into physical, environmental, land-use and cultural constraints for the purpose of comparing the TCC values assigned in the studies reviewed. We found the average quality of the studies to be generally acceptable in terms of the justification of the methodology, the weighting and classification of the variables, and the creation of a synthesis map. Nevertheless, the methods for assessing the TCC are not sufficiently standardized; there is a lack of uniformity in the cartographic information sources and methodologies for the TCC valuation. -- Highlights: • We explore 22 road-corridor planning studies subjected to the Spanish EIA regulation. • We analyze the variables selected for defining territorial carrying capacity. • The quality of the studies is acceptable (methodology, variable weighting, mapping). • There is heterogeneity in the methods for territorial carrying capacity valuation.

  17. libRoadRunner: A High Performance SBML Simulation and Analysis Library

    E-Print Network [OSTI]

    Endre T. Somogyi; Jean-Marie Bouteiller; James A. Glazier; Matthias König; Kyle Medley; Maciej H. Swat; Herbert M. Sauro

    2015-03-03

    This paper presents libRoadRunner, an extensible, high-performance, cross-platform, open-source software library for the simulation and analysis of models \\ expressed using Systems Biology Markup Language (SBML). SBML is the most widely used standard for representing dynamic networks, especially biochemical networks. libRoadRunner supports solution of both large models and multiple replicas of a single model on desktop, mobile and cluster computers. libRoadRunner is a self-contained library, able to run both as a component inside other tools via its C++ and C bindings andnteractively through its Python interface. The Python Application Programming Interface (API) is similar to the APIs of Matlab and SciPy, making it fast and easy to learn, even for new users. libRoadRunner uses a custom Just-In-Time (JIT) compiler built on the widely-used LLVM JIT compiler framework to compile SBML-specified models directly into very fast native machine code for a variety of processors, making it appropriate for solving very large models or multiple replicas of smaller models. libRoadRunner is flexible, supporting the bulk of the SBML specification (except for delay and nonlinear algebraic equations) and several of its extensions. It offers multiple deterministic and stochastic integrators, as well as tools for steady-state, stability analyses and flux balance analysis. We regularly update libRoadRunner binary distributions for Mac OS X, Linux and Windows and license them under Apache License Version 2.0. http://www.libroadrunner.org provides online documentation, full build instructions, binaries and a git source repository.

  18. Online Optimal Control of Connected Vehicles for Efficient Traffic Flow at Merging Roads

    SciTech Connect (OSTI)

    Rios-Torres, Jackeline [ORNL; Malikopoulos, Andreas [ORNL; Pisu, Pierluigi [Clemson University

    2015-01-01

    This paper addresses the problem of coordinating online connected vehicles at merging roads to achieve a smooth traffic flow without stop-and-go driving. We present a framework and a closed-form solution that optimize the acceleration profile of each vehicle in terms of fuel economy while avoiding collision with other vehicles at the merging zone. The proposed solution is validated through simulation and it is shown that coordination of connected vehicles can reduce significantly fuel consumption and travel time at merging roads.

  19. p-doping-free InGaN/GaN light-emitting diode driven by three-dimensional hole gas

    SciTech Connect (OSTI)

    Zhang, Zi-Hui; Tiam Tan, Swee; Kyaw, Zabu; Liu, Wei; Ji, Yun; Ju, Zhengang; Zhang, Xueliang [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore) [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); Wei Sun, Xiao, E-mail: EXWSUN@ntu.edu.sg [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); Department of Electronics and Electrical Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055 (China); Volkan Demir, Hilmi, E-mail: VOLKAN@stanfordalumni.org [LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); LUMINOUS Centre of Excellence for Semiconductor Lighting and Displays, School of Physical and Mathematical Sciences, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore (Singapore); Department of Electrical and Electronics, UNAM-Institute of Material Science and Nanotechnology, Bilkent University, Ankara TR-06800 (Turkey); Department of Physics, UNAM-Institute of Material Science and Nanotechnology, Bilkent University, Ankara TR-06800 (Turkey)

    2013-12-23

    Here, GaN/Al{sub x}Ga{sub 1-x}N heterostructures with a graded AlN composition, completely lacking external p-doping, are designed and grown using metal-organic-chemical-vapour deposition (MOCVD) system to realize three-dimensional hole gas (3DHG). The existence of the 3DHG is confirmed by capacitance-voltage measurements. Based on this design, a p-doping-free InGaN/GaN light-emitting diode (LED) driven by the 3DHG is proposed and grown using MOCVD. The electroluminescence, which is attributed to the radiative recombination of injected electrons and holes in InGaN/GaN quantum wells, is observed from the fabricated p-doping-free devices. These results suggest that the 3DHG can be an alternative hole source for InGaN/GaN LEDs besides common Mg dopants.

  20. Lasing characteristics of GaSb/GaAs self-assembled quantum dots embedded in an InGaAs quantum well

    E-Print Network [OSTI]

    Jalali. Bahram

    Center for High Technology Materials, University of New Mexico, 1313 Goddard SE, Albuquerque, New Mexico, New Mexico 87545 Received 26 February 2007; accepted 1 June 2007; published online 28 June 2007 intriguing optoelectronic device possibilities on GaAs substrates including lasers, detectors, or solar cells

  1. Ritual and Authority in Early Athens

    E-Print Network [OSTI]

    Laughy, Michael Harold

    2010-01-01

    on funerary amphorae with prothesis and ekphora scenes. See,Avebury. Ahlberg, G. 1971. Prothesis and Ekphora in Greekthe introduction of the prothesis scene on krater. 119 By

  2. Ritual and Authority in Early Athens

    E-Print Network [OSTI]

    Laughy, Michael Harold

    2010-01-01

    9&ôD&Aô, . Note also the dedication of a discus, IG i 3 989,+31,/! ’ %L A$µD/,; 556. Dedication of Altar of Twelve Gods:as the earliest state dedication in Athenian his- 595. Thuc.

  3. Athens, Greece: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC Jump to:Greece: Energy Resources Jump to: navigation, search

  4. Athens, Ohio: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC Jump to:Greece: Energy Resources Jump to: navigation, searchJump

  5. Athens, Ohio: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A SOpenAshley, Ohio:Atchison-Holt Electric Coop

  6. Athens, Wisconsin: Energy Resources | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAandAmminex A SOpenAshley, Ohio:Atchison-Holt Electric CoopWisconsin:

  7. Athens Utility Board | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop IncIowaWisconsin: EnergyYork Jump|Line SitingOil andAshtabulaIowa) Jump

  8. Envlron. Sci. Technol. 1993, 27, 1885-1891 On-Road Hydrocarbon Remote Sensing in the Denver Area

    E-Print Network [OSTI]

    Denver, University of

    of Denver's remote sensor for on-road motor vehicle carbon monoxide (CO) and hydrocarbon (HC thecarbonmonoxidetocarbon dioxide ratio (CO/COz) and the hydrocarbon to carbon dioxide ratio (HC/C02) in the exhaust of anyEnvlron. Sci. Technol. 1993, 27, 1885-1891 On-Road Hydrocarbon Remote Sensing in the Denver Area Yi

  9. PROVO POLLUTION PREVENTION PROGRAM A study designed to show that cost-effective on-road emissions reductions

    E-Print Network [OSTI]

    Denver, University of

    -road emissions reductions can be achieved with a targeted repair program. Prepared by University of Denver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 A. Chemistry of CO and HC Emissions from Automobiles . . . . . . . . . . . . . 3 B. Remote Sensing-road emissions monitor. It is capable of monitoring emissions at vehicle speeds between 2.5 and 150 mph in under

  10. REFUEL: an EU road map for biofuels , E. Deurwaarder and S. Lensink, ECN policy Studies, the Netherlands

    E-Print Network [OSTI]

    REFUEL: an EU road map for biofuels M. Londo1 , E. Deurwaarder and S. Lensink, ECN policy Studies), Poland K. Könighofer, Joanneum Research, Austria Abstract A successful mid-term development of biofuels calls for a robust road map. REFUEL assesses inter alia least-cost biofuel chain options, their benefits

  11. Wildlife Society Bulletin 2005, 33(2):745748 Peer refereed Distance sampling from roads is a common pop-

    E-Print Network [OSTI]

    Wallace, Mark C.

    Young and Priebe 1987, Borralho et al. 1996, Dahlheim et al. 2000). A critical assumption of the distance sam, but this assumption may be violated if the transect is a road (Burnham et al. 1980, Buckland et al. 2001, Williams et sites were cattle ranching interspersed with center-pivot agriculture and oil and gas development. Road

  12. A 3-10 GHZLCR-matched Power Amplifier using Flip-Chip Mounted AlGaN/GaN HEMTs

    E-Print Network [OSTI]

    York, Robert A.

    amplifier using GaN- HEMTs-on-Sapphire. I INTRODUCTION GaN HEMTs have enormous potential for realizing high-power Traveling Wave Power Amplifier circuit (TWPA)[1][2] for realization of wideband power amplifiersWE4A-5 A 3-10 GHZLCR-matched Power Amplifier using Flip-Chip Mounted AlGaN/GaN HEMTs Jane J

  13. Intermixing of InGaAs/GaAs Quantum Well Using Multiple Cycles Annealing Cu-doped SiO2

    SciTech Connect (OSTI)

    Hongpinyo, V; Ding, Y H; Dimas, C E; Wang, Y; Ooi, B S; Qiu, W; Goddard, L L; Behymer, E M; Cole, G D; Bond, T C

    2008-06-11

    The authors investigate the effect of intermixing in InGaAs/GaAs quantum well structure using Cu-doped SiO{sub 2}. The incorporation of Cu into the silica film yields larger bandgap shift than typical impurity-free vacancy diffusion (IFVD) method at a lower activation temperature. We also observe enhancement of the photoluminescence (PL) signal from the intermixed InGaAs/GaAs quantum well structure after being cycle-annealed at 850 C.

  14. Metamorphic GaAsP buffers for growth of wide-bandgap InGaP solar cells J. Simon,1,a

    E-Print Network [OSTI]

    Haller, Gary L.

    . INTRODUCTION Triple-junction metamorphic solar cells have reached ef- ficiencies as high as 41.1% by combiningMetamorphic GaAsP buffers for growth of wide-bandgap InGaP solar cells J. Simon,1,a S. Tomasulo,1 P-yP solar cells. Tensile-strained GaAsxP1-x buffers grown on GaAs using unoptimized conditions

  15. FIRST DEMONSTRATION OF MONOLITHIC InP-BASED InAlAs/InGaAsP/InGaAs TRIPLE JUNCTION SOLAR CELLS

    E-Print Network [OSTI]

    Atwater, Harry

    FIRST DEMONSTRATION OF MONOLITHIC InP-BASED InAlAs/InGaAsP/InGaAs TRIPLE JUNCTION SOLAR CELLS RobynAlAs/InGaAsP/InGaAs triple junction solar cell grown on InP substrate. X-ray diffraction characterization shows high quality solar cell materials. Preliminary 1-sun AM1.5D testing of the triple junction solar cell shows promising

  16. Characterization of Cu(In,Ga)Se2 (CIGS) films with varying gallium ratios

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

    Claypoole, Jesse; Peace, Bernadette; Sun, Neville; Dwyer, Dan; Eisaman, Matthew D.; Haldar, Pradeep; Efstathiadis, Harry

    2015-09-05

    Cu(In1-x,Gax)Se2 (CIGS) absorber layers were deposited on molybdenum (Mo) coated soda-lime glass substrates with varying Ga content (described as Ga/(In+Ga) ratios) with respect to depth. As the responsible mechanisms for the limitation of the performance of the CIGS solar cells with high Ga contents are not well understood, the goal of this work was to investigate different properties of CIGS absorber films with Ga/(In+Ga) ratios varied between 0.29 and 0.41 (as determined by X-ray florescence spectroscopy (XRF)) in order to better understand the role that the Ga content has on film quality. The Ga grading in the CIGS layer hasmore »the effect causing a higher bandgap toward the surface and Mo contact while the band gap in the middle of the CIGS layer is lower. Also, a wider and larger Ga/(In+Ga) grading dip located deeper in the CIGS absorber layers tend to produce larger grains in the regions of the films that have lower Ga/(In+Ga) ratios. It was found that surface roughness decreases from 51.2 nm to 41.0 nm with increasing Ga/(In+Ga) ratios. However, the surface roughness generally decreases if the Ga grading occurs deeper in the absorber layer.« less

  17. Radiation damage of GaAs thin-film solar cells on Si substrates

    SciTech Connect (OSTI)

    Itoh, Y.; Yamaguchi, M.; Nishioka, T.; Yamamoto, A.

    1987-01-15

    1-MeV electron irradiation damages in GaAs thin-film solar cells on Si substrates are examined for the first time. Damage constant for minority-carrier diffusion length in GaAs heteroepitaxial films on Si substrates is found to be the same as that in GaAs homoepitaxial films on GaAs substrates. This agreement suggests that GaAs/Si has the same defect introduction rate with radiation as GaAs/GaAs. The degradation of GaAs solar cells on Si with electron irradiation is less than that of GaAs solar cells on GaAs, because in the present, GaAs films on Si substrates have lower minority-carrier diffusion length compared to GaAs films on GaAs and these films are insensitive to radiation. The p/sup +/-p/sup +/-n AlGaAs-GaAs heteroface solar cell with junction depth of about 0.3 ..mu..m is concluded to be useful for a high-efficiency and radiation-resistant solar cell fabricated on a Si substrate.

  18. Bismuth-induced phase control of GaAs nanowires grown by molecular...

    Office of Scientific and Technical Information (OSTI)

    National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, 500 Yu-Tian Road, Shanghai 200083 (China) Materials Engineering,...

  19. Laser Gain and Threshold Properties in Compressive-Strained and Lattice-Matched GaInNAs/GaAs Quantum Wells

    SciTech Connect (OSTI)

    Chow, W.W.; Jones, E.D.; Modine, N.A.; Allerman, A.A.; Kurtz, S.R.

    1999-08-04

    The optical gain spectra for compressive-strained and lattice-matched GaInNAs/GaAs quantum wells are computed using a microscopic laser theory. From these spectra, the peak gain and carrier radiative decay rate as functions of carrier density are determined. These dependences allow the study of lasing threshold current density for different GAInNAs/GaAs laser structures.

  20. Metal contacts on ZnSe and GaN

    SciTech Connect (OSTI)

    Duxstad, K J [Univ. of California, Berkeley, CA (United States). Materials Science and Mineral Engineering

    1997-05-01

    Recently, considerable interest has been focused on the development of blue light emitting materials and devices. The focus has been on GaN and ZnSe, direct band gap semiconductors with bands gaps of 3.4 and 2.6 eV, respectively. To have efficient, reliable devices it is necessary to have thermally and electrically stable Ohmic contacts. This requires knowledge of the metal-semiconductor reaction behavior. To date few studies have investigated this behavior. Much information has accumulated over the years on the behavior of metals on Si and GaAs. This thesis provides new knowledge for the more ionic wide band gap semiconductors. The initial reaction temperatures, first phases formed, and phase stability of Pt, Pd, and Ni on both semiconductors were investigated. The reactions of these metals on ZnSe and GaN are discussed in detail and correlated with predicted behavior. In addition, comparisons are made between these highly ionic semiconductors and Si and GaAs. The trends observed here should also be applicable to other II-VI and III-Nitride semiconductor systems, while the information on phase formation and stability should be useful in the development of contacts for ZnSe and GaN devices.

  1. Contribution of alloy clustering to limiting the two-dimensional electron gas mobility in AlGaN/GaN and InAlN/GaN heterostructures: Theory and experiment

    SciTech Connect (OSTI)

    Ahmadi, Elaheh; Mishra, Umesh K. [Electrical and Computer Engineering Department, University of California, Santa Barbara, California 93106 (United States); Chalabi, Hamidreza [Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305 (United States); Kaun, Stephen W.; Shivaraman, Ravi; Speck, James S. [Materials Department, University of California, Santa Barbara, California 93106 (United States)

    2014-10-07

    The influence of alloy clustering on fluctuations in the ground state energy of the two-dimensional electron gas (2DEG) in AlGaN/GaN and InAlN/GaN heterostructures is studied. We show that because of these fluctuations, alloy clustering degrades the mobility even when the 2DEG wavefunction does not penetrate the alloy barrier unlike alloy disorder scattering. A comparison between the results obtained for AlGaN/GaN and InAlN/GaN heterostructures shows that alloy clustering limits the 2DEG mobility to a greater degree in InAlN/GaN heterostructures. Our study also reveals that the inclusion of an AlN interlayer increases the limiting mobility from alloy clustering. Moreover, Atom probe tomography is used to demonstrate the random nature of the fluctuations in the alloy composition.

  2. ADEPT SCIENTIFIC ENDNOTE LANDESLIZENZ VEREINBARUNG Dies ist eine Vereinbarung zwischen Thomson ResearchSoft mit Hauptsitz in 2141 Palomar Airport Road, Suite 350,

    E-Print Network [OSTI]

    Ott, Albrecht

    ResearchSoft mit Hauptsitz in 2141 Palomar Airport Road, Suite 350, Carlsbad, CA 92009, USA vertreten durch

  3. Distributional properties of Euclidean distances in wireless networks involving road systems

    E-Print Network [OSTI]

    Schmidt, Volker

    1 Distributional properties of Euclidean distances in wireless networks involving road systems of large wireless networks. The network geometry is modelled by random geometric graphs, and the locations are closely related with the interference geometry and, consequently, the performance of wireless networks

  4. 30/07/14 Coopera've Driving for Road Goods Transporta'on

    E-Print Network [OSTI]

    Johansson, Karl Henrik

    Union (400 000 in Germany) · 19 000 000 light+medium+heavy trucks in China;30/07/14 3 Demands from Goods Road TransportaCon · 24% of long haulage trucks run Lead T3 Truck 1Truck 2Truck 3 Truck 1 Truck 2 Truck 3 Air drag reducCon [%] Rela

  5. The Effects of Altitude on Heavy-Duty Diesel Truck On-Road

    E-Print Network [OSTI]

    Denver, University of

    The Effects of Altitude on Heavy-Duty Diesel Truck On-Road Emissions G A R Y A . B I S H O P , * J oxide from 5772 heavy-duty diesel trucks at five locations in the United States and Europe show slightly emissions has largely been focused on the regulation and control of exhaust emissions from light

  6. Life Cycle Assessment Comparing the Use of Jatropha Biodiesel in the Indian Road and Rail Sectors

    SciTech Connect (OSTI)

    Whitaker, M.; Heath, G.

    2010-05-01

    This life cycle assessment of Jatropha biodiesel production and use evaluates the net greenhouse gas (GHG) emission (not considering land-use change), net energy value (NEV), and net petroleum consumption impacts of substituting Jatropha biodiesel for conventional petroleum diesel in India. Several blends of biodiesel with petroleum diesel are evaluated for the rail freight, rail passenger, road freight, and road-passenger transport sectors that currently rely heavily on petroleum diesel. For the base case, Jatropha cultivation, processing, and use conditions that were analyzed, the use of B20 results in a net reduction in GHG emissions and petroleum consumption of 14% and 17%, respectively, and a NEV increase of 58% compared with the use of 100% petroleum diesel. While the road-passenger transport sector provides the greatest sustainability benefits per 1000 gross tonne kilometers, the road freight sector eventually provides the greatest absolute benefits owing to substantially higher projected utilization by year 2020. Nevertheless, introduction of biodiesel to the rail sector might present the fewest logistic and capital expenditure challenges in the near term. Sensitivity analyses confirmed that the sustainability benefits are maintained under multiple plausible cultivation, processing, and distribution scenarios. However, the sustainability of any individual Jatropha plantation will depend on site-specific conditions.

  7. On-Road Remote Sensing of Automobile Emissions in the Phoenix Area: Year 1

    E-Print Network [OSTI]

    Denver, University of

    80208 November 1999 Prepared for: Coordinating Research Council, Inc. 219 Perimeter Center Parkway selected for 1999. On-Road Remote Sensing in the Phoenix Area: Year 1 2 #12;INTRODUCTION Many cities Agency. Carbon monoxide (CO) levels become elevated primarily due to direct emission of the gas

  8. On-Road Remote Sensing of Automobile Emissions in the Chicago Area: Year 4

    E-Print Network [OSTI]

    Denver, University of

    , CO 80208 August 2001 Prepared for: Coordinating Research Council, Inc. 3650 Mansell Road, Suite 140, 1999 and 1998 to match the vehicle driving patterns of the fleet measured in 1997. After doing so by the Environmental Protection Agency (EPA). Carbon monoxide (CO) levels become elevated primarily due to direct

  9. Techniques and Technology Article Road-Based Surveys for Estimating Wild Turkey Density

    E-Print Network [OSTI]

    Wallace, Mark C.

    Techniques and Technology Article Road-Based Surveys for Estimating Wild Turkey Density-transect­based distance sampling has been used to estimate density of several wild bird species including wild turkeys (Meleagris gallopavo). We used inflatable turkey decoys during autumn (Aug­Nov) and winter (Dec­Mar) 2003

  10. 4-143 Koeppl On the road to energy-efficient mobility in Austria

    E-Print Network [OSTI]

    Steininger, Karl W.

    and transformation technologies as well as primary energy. Energy service in mobility is defined as the access.e. changes in energy services, application and transformation technologies as well as primary energy1 of 7 4-143 Koeppl On the road to energy-efficient mobility in Austria: An extended technology

  11. TOOLS TO MODEL ROAD IMPACTS Providing scientific knowledge and technology to sustain

    E-Print Network [OSTI]

    Fried, Jeremy S.

    TOOLS TO MODEL ROAD IMPACTS Providing scientific knowledge and technology to sustain our nation://www.fs.fed.us/rm/boise/AWAE_home.shtml BACKGROUND The Rocky Mountain Research Station has a long his- tory of developing tools that meet the needs. Existing tools have been optimized to answer particular man- agement questions at specific spatial scales

  12. Modelling a Car Safety Controller in Road Tunnels using Hybrid Petri Nets A. Bobbio[1

    E-Print Network [OSTI]

    Horváth, András

    Modelling a Car Safety Controller in Road Tunnels using Hybrid Petri Nets A. Bobbio[1] , M this specific issue and proposes a hybrid modeling approach based on fluid Petri nets (FPN). An FPN is used that FPN is a valid paradigm to model the dynamics of a car in a detailed way. 1 Introduction In the last

  13. ON-ROAD REMOTE SENSING OF CO AND HC EMISSIONS IN CALIFORNIA

    E-Print Network [OSTI]

    Denver, University of

    1994. v #12;vi #12;ABSTRACT The University of Denver remote sensor for on-road measurement of motor vehicle carbon monoxide and hydrocarbon emissions was used for 30 days in California in 1991 than 130,000 measurements, resulting in 91,679 records with emissions and vehicle information (from

  14. Remote Sensing of Mobile Source Air Pollutant Emissions: Variability and Uncertainty in On-Road Emissions

    E-Print Network [OSTI]

    Frey, H. Christopher

    in the Hydrocarbon Emission Factor 65 6.0 REMOTE SENSING MEASUREMENTS AND ESTIMATED EMISSION FACTORS FOR SCHOOL BUSES-Road Emissions Estimates of Carbon Monoxide and Hydrocarbons for School and Transit Buses Report No. FHWY/NC/97 Transit Buses 34 4.0 SELECTION OF REMOTE SENSING MEASUREMENT SITES 36 4.1 Site Selection Strategies 36 4

  15. PRINCETON CHARITABLE FOUNDATION LIMITED 19 NORCOTT ROAD LONDON N16 7EJ UNITED KINGDOM

    E-Print Network [OSTI]

    Rowley, Clarence W.

    PRINCETON CHARITABLE FOUNDATION LIMITED 19 NORCOTT ROAD · LONDON N16 7EJ · UNITED KINGDOM GIFT AID have paid or will pay an amount of Income Tax and/or Capital Gains Tax for each tax year (6 April to 5 April) that is at least equal to the amount of tax that all the charities or Community Amateur Sports

  16. Suggestions for the Road to Copenhagen University of California, Berkeley, karp@are.berkeley.edu

    E-Print Network [OSTI]

    Karp, Larry S.

    Suggestions for the Road to Copenhagen Larry Karp University of California, Berkeley, karp than carbon taxes. A Central Bank maintains stability of car- bon prices by defending a price ceiling clause, emissions trade, taxes versus cap and trade, price stability, carbon leakage, trade restrictions

  17. Addendum: Tenth International Symposium on Alcohol Fuels, The road to commercialization

    SciTech Connect (OSTI)

    Not Available

    1994-05-01

    The Tenth International Symposium on ALCOHOL FUELS ``THE ROAD TO COMMERCIALIZATION`` was held at the Broadmoor Hotel, Colorado Springs, Colorado, USA November 7--10, 1993. Twenty-seven papers on the production of alcohol fuels, specifications, their use in automobiles, buses and trucks, emission control, and government policies were presented. Individual papers have been processed separately for entry into the data base.

  18. Modelling changes in suspended sediment from forest road surfaces in a coastal watershed of British Columbia

    E-Print Network [OSTI]

    Venditti, Jeremy G.

    for a typical medium-size coastal watershed of British Columbia or the American Pacific Northwest-known negative impacts on the aquatic environment and are thought to produce more sediment than most other and Wondzell, 2005). The removal of forests for construction of road surfaces and their right

  19. POPULATION RESPONSES OF COHO AND CHINOOK SALMON TO SEDIMENTATION ASSOCIATED WITH FOREST ROADS IN A COASTAL

    E-Print Network [OSTI]

    _____________________________________________ Committee Member: Duncan Knowler Associate Dean, Faculty of Environment Associate Professor, School suspended-sediment events caused by forest road construction and use on populations of chinook (Oncorhynchus tshawytscha) and coho salmon (Oncorhynchus kisutch) in a medium-sized coastal watershed of the lower Fraser

  20. Multi-source Skyline Query Processing in Road Networks Ke Deng Xiaofang Zhou Heng Tao Shen

    E-Print Network [OSTI]

    Zhou, Xiaofang

    to Geographical Information Systems, to support de- cision making in the areas such as intelligent transport sys to physically move from a to b along a spatial network (e.g., roads or water systems) or on/near a terrain

  1. USVIEnergyRoadMap Charting the Course to a Clean Energy Future

    E-Print Network [OSTI]

    to help island nations and territories increase their energy security by adopting energy efficiencyUSVIEnergyRoadMap Charting the Course to a Clean Energy Future EDIN Energy Development in Island Nations U.S. Virgin Islands EDIN Energy Development in Island Nations U.S. Virgin Islands EDIN Energy

  2. Research Journal Highlights The silk road to bio-integrated electronics

    E-Print Network [OSTI]

    Rogers, John A.

    Research Journal Highlights The silk road to bio-integrated electronics Nature Materials, April 19, 2010 A strategy for making flexible electronic circuits for bio-implants is reported online this week in Nature Materials. Dissolvable silk substrates enable the use of ultrathin, finely spaced electronic

  3. Coordinated avifaunal roadCounts (Car) inforMation sHeet no. 1 June 2013

    E-Print Network [OSTI]

    de Villiers, Marienne

    Coordinated avifaunal roadCounts (Car) inforMation sHeet no. 1 June 2013 HoW to Count This information sheet is intended as a guide for CAR counts anywhere in South Africa, but minor regional, your map and route description, relevant newsletter and the CAR roadcount form. Bird books, hat, lunch

  4. Taxonomy based models for reasoning: making inferences from electronic road sign information

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Taxonomy based models for reasoning: making inferences from electronic road sign information Université de Paris 8, 2 rue de la Liberté F-93526 St DenisCédex02 France Abstract Taxonomy Based modeling to the behaviour of the drivers we interviewed. Finally, Taxonomy Based Modeling is discussed as a tool for mental

  5. Fact #625: May 31, 2010 Distribution of Trucks by On-Road Vehicle Weight

    Broader source: Energy.gov [DOE]

    According to weigh-in-motion data collected by fifteen states, the majority of 5-axle tractor-trailers on the road weigh between 33,000 and 73,000 lbs.Eleven percent of the tractor-trailers had...

  6. Insulators for cold urban areas: The problem of Road Salt Ravi Gorur and Sreeram Venkataraman

    E-Print Network [OSTI]

    of insulators in winter due to road salt. We have started a research project at Arizona State University that is being funded through an industry-utility-university consortium PSERC, Power Sytems Engineering Research Center. Rest assured, we are not trying to reproduce winter conditions in Sunny Arizona, rather, we

  7. Detection of Vulnerable Road Users in Smart Cities Francisco Guayante, Arnoldo Daz-Ramrez

    E-Print Network [OSTI]

    Mejia-Alvarez, Pedro

    that the population of a city grows, new problems arise, which include scarcity of resources, pollution, and traffic [1]. However, bigger cities generate new kinds of problems, such as scarcity of resources, pollutionDetection of Vulnerable Road Users in Smart Cities Francisco Guayante, Arnoldo Díaz

  8. VTrack: Accurate, Energy-Aware Road Traffic Delay Estimation Using Mobile Phones

    E-Print Network [OSTI]

    the bat- tery quickly. In these cases, VTrack can use alternative, less energy-hungry but noisier sensorsVTrack: Accurate, Energy-Aware Road Traffic Delay Estimation Using Mobile Phones Arvind Thiagarajan for travel time estimation using this sensor data that addresses two key challenges: energy consumption

  9. ASPB News,Vol. 35, No. 6 11 A Winding Road to a Happy Academic Career

    E-Print Network [OSTI]

    Tobin, Elaine

    ASPB News,Vol. 35, No. 6· 11 A Winding Road to a Happy Academic Career by Elaine Tobin Professor that naive!) One of the enjoyable biology courses was taught by Tom Scott, who had been one of Winslow Briggs Nobel Prize winners, and women "obviously" couldn't achieve at that level!) However, luckily for me, I

  10. University of Connecticut School of Nursing, 231 Glenbrook Road, Storrs, CT 062692026 NEWS RELEASE

    E-Print Network [OSTI]

    Alpay, S. Pamir

    University of Connecticut School of Nursing, 231 Glenbrook Road, Storrs, CT 062692026 NEWS, 2015 Storrs, CT - The University of Connecticut School of Nursing jumped 36 spots from a No. 79 ranking, students, community partners and alumni at the University of Connecticut's School of Nursing," said Dean

  11. A Pedestrian View of the Roads to Open Access: Understanding Workflows to Enrich Infrastructure 

    E-Print Network [OSTI]

    Burnhill, Peter; de Castro, Pablo; Dorward, Andrew; Sloan, Terry

    Things are moving quickly on the policy front with respect to the roads to Open Access with renewed focus on Gold Open Access. Gold OA is essentially the purchase of a service from a publisher: that the Publisher’s (or ...

  12. Remote Sensing of Ammonia and Sulfur Dioxide from On-Road Light

    E-Print Network [OSTI]

    Denver, University of

    Remote Sensing of Ammonia and Sulfur Dioxide from On-Road Light Duty Vehicles D A N I E L A . B U R by dynamometer (16), remote sensing (17), and recently by a chase vehicle (18). Results from these studies vary

  13. ON-ROAD REMOTE SENSING OF CO EMISSIONS IN THE LOS ANGELES

    E-Print Network [OSTI]

    Denver, University of

    #12;ON-ROAD REMOTE SENSING OF CO EMISSIONS IN THE LOS ANGELES BASIN Donald H. Stedman, Gary A. Comparison of tailpipe %CO measured by an on-board analyzer and by remote sensing. Data collected 12/8/89, 12

  14. On-Road Remote Sensing of Vehicle Exhaust Emissions in Auckland, New Zealand

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Vehicle Exhaust Emissions in Auckland, New Zealand S. Xie, J. G. Bluett Zealand's vehicle fleet. The remote sensing campaign was implemented to establish the emissions profile of this remote sensing campaign was to redress this knowledge gap, improve understanding of the emissions

  15. USVI Energy Road Map: Charting the Course to a Clean Energy Future (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2011-07-01

    This brochure provides an overview of the integrated clean energy deployment process and progress of the Energy Development in Island Nations U.S. Virgin Islands pilot project road map, including over-arching goals, organization, strategy, technology-specific goals and accomplishments, challenges, solutions, and upcoming milestones.

  16. On-Road Remote Sensing of Automobile Emissions in the Los Angeles Area

    E-Print Network [OSTI]

    Denver, University of

    On-Road Remote Sensing of Automobile Emissions in the Los Angeles Area: Year 1 Gary A. Bishop a nine-day remote sensing study in the Los Angeles, CA area in the summer of 1999. The remote sensor used in this study exhibit a gamma distribution, with the dirtiest 10% of the fleet responsible for 70%, 53%, and 51

  17. Sustainability impacts of car road pricing: A computable general equilibrium analysis for Austria

    E-Print Network [OSTI]

    Keeling, Stephen L.

    2006 Nationwide car road pricing schemes are discussed across Europe. We analyse the impacts important since the 1970s. Transport is now responsible for at least a quarter of world primary energy use, in the economist's jargon, "second-best" (see, e.g., Calthrop and Proost, 1998; Nash et al., 2001; Ubbels et al

  18. EA-1980: Spar Canyon-Round Valley Access Road System Improvements, Custer County, Idaho

    Broader source: Energy.gov [DOE]

    Bonneville Power Administration is preparing an EA to assess potential environmental impacts of proposed improvements to the access road system for its existing Spar Canyon-Round Valley Transmission Line located on Bureau of Land Management land in Custer County, Idaho.

  19. Seymour Marine Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Seymour Marine Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060 (831 were recognized at a ceremony and reception at the Seymour Marine Discovery Center on Thursday, January of the Seymour Center. The Student Research and Education Awards are made possible from annual income on six

  20. Seymour Marine Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Seymour Marine Discovery Center at Long Marine Lab 100 Shaffer Road * Santa Cruz, CA 95060 (831) 459-3800 2014 Endowment Challenge to benefit Seymour Marine Discovery Center SANTA CRUZ, CA--UC Santa Cruz will add $100,000 to a reserve fund for the campus's Seymour Marine Discovery Center