Sample records for young dallas archer

  1. Biomass IBR Fact Sheet: Archer Daniels Midland

    Broader source: Energy.gov [DOE]

    Archer Daniels Midland will develop a pilot plant to demonstrate the continuous production of cellulosic ethanol and butyl acrylate from densified corn stover.

  2. Archer Daniels Midland | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcatAntrim County,Delhi (NCT),ArborviewArcher City, Texas:Archer

  3. Frazier Courts, Dallas

    E-Print Network [OSTI]

    Hall, B.

    2011-01-01T23:59:59.000Z

    Through generous donations Dallas Habitat installed 13 existing Dallas Habitat homes with solar panels & 2 new homes with solar panels Oncor & Green Mountain donated funds to have 47.5 KW of solar arrays installed on Dallas Habitat?s offices... to green building First homes utilized geo-thermal air systems & energy efficient SIP (Structural Insulated Panel) construction Dallas Habitat began building all homes Energy Star Certified in 2004 2008 -DSSI; effort to link green building...

  4. CRISTINA L. ARCHER (ne Cristina Lozej)

    E-Print Network [OSTI]

    Firestone, Jeremy

    : Saturation wind power potential and its implications for wind energy. Proceedings of the National Academy: California offshore wind energy potential. Renewable Energy, doi:10.1016/j.renene.2009.11.022. Archer, C. L: Exploring wind energy potential off the California Coast. Geophysical Research Letters, doi:10.1029/2008GL

  5. V-234: EMC RSA Archer GRC Open Redirection Weakness and Security...

    Energy Savers [EERE]

    4: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue September...

  6. archer fishes toxotes: Topics by E-print Network

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

    20 21 22 23 24 25 Next Page Last Page Topic Index 1 Hydrodynamics of jumping in archer fish, Toxotes microlepis MIT - DSpace Summary: The maneuvering of fish is not only of...

  7. MIS @ UT Dallas Creating Value Through IT -Driven Business Intelligence

    E-Print Network [OSTI]

    O'Toole, Alice J.

    Network Engineer III McDonald's IT Staff UT Dallas Computing Help Desk SAP America Senior Product North America Sales Associate Fidelity Investments Associate Systems Analyst Ernst & Young Forensic Technology and Discovery Services Walmart Inventory Associate Bank of America Project Consultant National

  8. Archer City, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcatAntrim County,Delhi (NCT),ArborviewArcher City, Texas: Energy

  9. V-151: RSA Archer eGRC Bugs Let Remote Authenticated Users Upload...

    Energy Savers [EERE]

    5.x ABSTRACT: Several vulnerabilities were reported in RSA Archer eGRC. REFERENCE LINKS: EMC SecurityTracker Alert ID: 1028516 CVE-2013-0932 CVE-2013-0933 CVE-2013-0934 IMPACT...

  10. V-084: RSA Archer eGRC Permits Cross-Site Scripting, Cross-Domain...

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

    Users Upload Files and Let Remote Users Conduct Cross-Site Scripting Attacks V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass Security Issue U-129: RSA...

  11. Jefferson Lab Leadership Council - Michael Dallas

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

    Force in Mogadishu, Somalia, served as deputy commander, Multinational Forces in Haiti, and as assistant division commander, 10th Mountain Division. Dallas served in key...

  12. A review of "Old Worlds: Egypt, Southwest Asia, India, and Russia in Early Modern English Writing." by John Michael Archer 

    E-Print Network [OSTI]

    Galina Yermolenko

    2002-01-01T23:59:59.000Z

    232 SEVENTEENTH-CENTURY NEWS John Michael Archer. Old Worlds: Egypt, Southwest Asia, India, and Russia in Early Modern English Writing. Stanford: Stanford Univer- sity Press, 2001. ix + 240 pp. $49.50. Review by GALINA YERMOLENKO, DESALES..., the book explores the discourse of ?decline? of the Old World non-European civiliza- tions?i.e., the emergence of racial, sexual, and gender stereotypes about Egypt, Southwest Asia, Russia, and India?in early modern English writing. Archer?s work does...

  13. City of Dallas- Green Energy Purchasing

    Broader source: Energy.gov [DOE]

    Furthermore, the Dallas/Fort Worth International Airport is the highest-ranked airport for renewable energy use, separately ranking 7th on the Green Power Partner listing of local government gree...

  14. City of Dallas- Residential and Commercial Green Building Requirements

    Broader source: Energy.gov [DOE]

    Notably, Dallas became the first U.S. city to adopt the 2012 International Green Construction Code (with amendments, hereafter Dallas Green Construction Code) as mandatory for new commercial cons...

  15. A review of "Old Worlds: Egypt, Southwest Asia, India, and Russia in Early Modern English Writing." by John Michael Archer

    E-Print Network [OSTI]

    Galina Yermolenko

    2002-01-01T23:59:59.000Z

    ?s Anthony and Cleopatra. Archer?s reading of Cleopatra as ?Egypt? invokes gender, sexual, and racial stereotypes, but does not show definitively that the play confirms the model of degeneration. The author argues that Egypt was reconstructed in early... Cleopatra as a wonderful piece of work (61) and that early modern English fantasy of Egyptian empire was not altogether unattractive. Hence, the author?s state- ments that Anthony and Cleopatra ?coincides? with the shift in repre- sentation of Egypt...

  16. City of Dallas- Green Building Expedited Plan Review

    Broader source: Energy.gov [DOE]

    The Dallas Green Building Program establishes expedited permitting for green buildings. During Phase 1 of the program (October 1, 2009 - September 30, 2011), applicants must provide a checklist...

  17. Archer County, Texas ASHRAE 169-2006 Climate Zone | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-fTriWildcatAntrim County,Delhi (NCT),ArborviewArcher City, Texas:

  18. Timothy E John Dallas Department of Electrical and Computer Engineering

    E-Print Network [OSTI]

    Zhuang, Yu

    Hendriske, Daniel Buscarello, Immanuel Purushothaman, and Tim Dallas, J. of Microelectromechanical Systems-Axis Stage," ­ G. Sivakumar, J. Matthews, and T. Dallas, J. of Microelectromechanical Systems 19, pp. 451. of Microelectromechanical Systems 19, pp. 632-639 (2010). 9. "Design and Analysis of a Dual-Mode MEMS Micromirror," X. Xiong

  19. HASE'07 Panel 4a Dallas, TX Achieving High Assurance

    E-Print Network [OSTI]

    Tian, Jeff

    Jeff Tian (tian@engr.smu.edu) Southern Methodist University Dallas, Texas, USA Contents · HA Jeff Tian, SMU #12;HASE'07, Dallas, TX Slide. 2 Qualitative vs Quantification HA · Many aspects/subsystems. Performance: measurement/modeling. Analysis: statistical/other modeling Nov. 15, 2007 Jeff Tian, SMU #12;HASE

  20. Dallas, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs andCrops Ltd Jump1-EA Jump to:Crosse,ArgentinaDallas,

  1. City of Dallas- Green Building Requirements for Municipal Buildings

    Broader source: Energy.gov [DOE]

    In 2003 the Dallas City Council passed a resolution requiring that all new municipal buildings larger than 10,000 square feet be constructed to meet LEED Silver Certification standards. In 2006...

  2. Dallas-Fort Worth, TX Clean Taxi Replacement Incentive

    Broader source: Energy.gov [DOE]

    The North Central Texas Council of Governments has partnered with the U.S. Environmental Protection Agency and the City of Dallas to develop the North Texas Green & Go Clean Taxi Partnership as...

  3. City of Dallas- Green Building Policy for Municipal Buildings

    Broader source: Energy.gov [DOE]

    The first building completed under this policy was the Jack Evans Police Headquarters, which obtained LEED Silver certification in December 2005. As of 2015, Dallas has 26 LEED certified...

  4. SCOPES'05 Dallas, TX, Sept., 2005 Risk-Based Quality Improvement

    E-Print Network [OSTI]

    Tian, Jeff

    (tian@engr.smu.edu) Southern Methodist University Dallas, Texas, USA Contents · Quality, Reliability for ES Jeff Tian, SMU #12;SCOPES'05, Dallas, TX, Sept., 2005 Slide. 2 Quality, Reliability, and Risk 0. SE Panel: New SE Paradigms for ES Jeff Tian, SMU #12;SCOPES'05, Dallas, TX, Sept., 2005 Slide. 3 Risk

  5. Energy Savings Report For Dallas County, July 2000 – June 2001

    E-Print Network [OSTI]

    Claridge, D. E.; Baltazar-Cervantes, J. C.; Zhu, Y.

    2001-01-01T23:59:59.000Z

    This report presents the energy and dollar savings for the period July 2000 - June 2001 for 12 Dallas County facilities that have been retrofit by Enershop. The savings for this period total $745,046, which represent 73.2% of the audit estimated...

  6. University of Texas at Dallas Radiation Safety Manual

    E-Print Network [OSTI]

    O'Toole, Alice J.

    Principles of Radiation Protection E. Exposure Limits for Radiation Workers F. Types of Radiation Exposure G. Biological Effects of Radiation H. Personnel Monitoring I. Bioassays J. ProtectiveUniversity of Texas at Dallas Radiation Safety Manual Table of Contents Introduction Emergency

  7. The University of Texas at Dallas Texas Hazardous Communication Act

    E-Print Network [OSTI]

    O'Toole, Alice J.

    The University of Texas at Dallas Texas Hazardous Communication Act Handbook #12;TEXAS HAZARDOUS IV. Texas Hazard Communication Act Exemptions V. Implementation A. Employee Rights Under the Act Explanation IX. Written Hazard Communication Program A. Manufacturers' Labels and Other Forms of Warning B

  8. SMU, Dept of Electrical Engineering Dallas, Texas 75275

    E-Print Network [OSTI]

    Chen, Thomas M.

    Tom Chen SMU, Dept of Electrical Engineering Dallas, Texas 75275 tchen@engr.smu.edu www.engr.smu.edu/~tchen The Latest Malware Threats Against Your PC #12;TC/10-11-05/IndustryAffiliates SMU Engineering p. MalwareAffiliates SMU Engineering p. Malware Damages 3 · $169-204 billion: total damages from malware in 2004 [mi2g

  9. Lamb customer satisfaction in two Texas cities - - Dallas and Houston

    E-Print Network [OSTI]

    Maddock, Travis David

    2001-01-01T23:59:59.000Z

    An in-home lamb study evaluated consumer ratings from users of lamb (at least once per month) as influenced by cut (blade chop, rib chop, loin chop, and leg steak), demographics, preparation method, and degree of doneness. Consumers in Dallas...

  10. Municipal Consortium LED Street Lighting Workshop Presentations and Materials—Dallas, TX

    Broader source: Energy.gov [DOE]

    This page provides links to the presentations given at the DOE Municipal Solid-State Street Lighting Consortium Workshop held in Dallas March 15–16, 2012.

  11. Kathleen A. Byrnes, Ph.D. The University of Texas at Dallas

    E-Print Network [OSTI]

    O'Toole, Alice J.

    Kathleen A. Byrnes, Ph.D. The University of Texas at Dallas 800 West Campbell Road, Mail Station HH30 Richardson, Texas 75080-3021 (972)883-2323 Education Texas Woman's University, Denton, Texas-term Care. Amberton University, Dallas, Texas. Master of Arts in Counseling Baylor University, Waco, Texas

  12. Alternative Fuel Transit Buses: DART's (Dallas Area Rapid Transit) LNG Bus Fleet Final Results

    SciTech Connect (OSTI)

    Chandler, K. [Battelle (US); Norton, P. [National Renewable Energy Lab., Golden, CO (US); Clark, N.

    2000-11-07T23:59:59.000Z

    In 1998, Dallas Area Rapid Transit, a public transit agency in Dallas, Texas, began operating a large fleet of heavy-duty buses powered by liquefied natural gas. As part of a $16 million commitment to alternative fuels, DART operates 139 LNG buses serviced by two new LNG fueling stations.

  13. Dallas County, Alabama: 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database Data and Resources11-DNA JumpRenewablesDallam County,Dallas

  14. Alternative Fuels Data Center: Dallas Airport Operates With Alternative

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels Clean Cities Reflects on 20onFuels Dallas

  15. Geochemical study of lead in soils from West Dallas, Texas

    SciTech Connect (OSTI)

    Ibrahim, N.M.; Carter, J.L. (Univ. of Texas, Dallas, TX (United States). Programs in Geosciences)

    1993-02-01T23:59:59.000Z

    Soil samples from West Dallas near the RSR smelter were collected and tested to see the content, source, and mobility of lead. 30 cm and 90 cm long cores were cut into 1 cm long pieces and each piece analyzed separately. The results showed that 90%--95% of the lead is readily extractable in cold dilute nitric acid. The lateral distribution of lead in West Dallas indicates an exponential-like decrease with distance from the RSR smelter. Concentrations greater than 500 ppm occur in soils below 10 cm within 1,000 feet of the smelter. In the vicinity of the smelter (300 feet radius), soil cores with total lead content as high as 18,000 ppm in the top 15 cm were obtained. At a distance of 2,400 feet of the smelter the lead in the soil amounts to 400 ppm and drops to 270 ppm at 4,000 feet. The total lead content with depth, correlates with previous clean-up and civil activities in the area: (1) where the soil is original, the lead concentration decreases exponentially with depth; (2) where the soil was cleaned up, the top 10 cm are devoid of lead but are underlain by soil whose lead content varies in response to distance from the smelter; (3) where the top soil had been disturbed (removed, replaced, mixed, etc.) as a result of civil works, the lead content is relatively lower than 1 (above). The underlying insitu soils exhibit similar lead concentration as those in 2 (above).

  16. An ozone climatology of the Dallas-Fort Worth area and its relationship to meteorology 

    E-Print Network [OSTI]

    Nobis, Timothy Edward

    1998-01-01T23:59:59.000Z

    The Environmental protection agency has established a hics. National Ambient Air Quality Standard for surface ozone through the Clean Air Act and its amendments. The Dallas / Fort Worth area is in violation of these standards, and to date...

  17. Texas Watershed Coordinator Roundtable Dallas, Texas July 27, 2010 First Last Organization Email

    E-Print Network [OSTI]

    -Galveston Area Council justin.bower@h-gac.com Henry Brewer U.S. EPA, Region 6 brewer.henry@epa.gov Gary Bryant Coordinator Roundtable Dallas, Texas July 27, 2010 Diane Hyatt Texas Water Develoment board Diane

  18. Case Study Walnut Hill United Methodist Church - Dallas, Texas, Chiller Replacement Analysis

    E-Print Network [OSTI]

    Phillips, J.

    1998-01-01T23:59:59.000Z

    In March of 1992 Walnut Hill United Methodist Church in Dallas, Tx. decided that their existing thermal storage and electric reciprocating chiller system were both in need of replacement. After analyzing several options, they chose to install 150...

  19. Top 10 Considerations of 2012 IECC and IgCC in Dallas

    E-Print Network [OSTI]

    Basora, Z.

    2013-01-01T23:59:59.000Z

    Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 ? Statewide energy code; adoption mandated by SECO ? Jurisdictional sustainability code ?Dallas modified and adopted as Dallas City Code Chapter 61 ? Alternate compliance...CATEE CONFERENCE SAN ANTONIO, TX December 18, 2013 ESL-KT-13-12-31 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 This presentation is protected by US and International copyright laws. Reproduction...

  20. Landslide susceptibility mapping for real estate development, tested along I-35, Dallas to San Antonio, Texas 

    E-Print Network [OSTI]

    Gaidusek, Barbara Ursel Marie

    1982-01-01T23:59:59.000Z

    LANDSLIDE SUSCEPTIBILITY MAPPING FOR REAL ESTATE DEVELOPMENT, TESTED ALONG 1-35, DALLAS TO SAN ANTONIO, TEXAS A Thesis by BARBARA URSEL MARIE GAIDUSEK Subm1tted to the Graduate College of Texas ARM University 1n partial fulfillment... of the requirement for the degree of MASTER OF SCIENCE August 1982 Major Subject: Geolooy LANDSLIDE SUSCEPTIBILITY MAPPING FOR REAL ESTATE DEVELOPMENT, TESTED ALONG 1-35, DALLAS TO SAN ANTONIO, TEXAS A Thesis by BARBARA URSEL MARIE GAIDUSEK Approved...

  1. Mitigation of light rail transit construction on jurisdictional areas in the White Rock Creek floodplain, Dallas, Texas

    E-Print Network [OSTI]

    Schieffer, Emily; Smiley, Jerry

    2001-01-01T23:59:59.000Z

    AREAS IN THE WHITE ROCK CREEK FLOODPLAIN, DALLAS, TEXAS1.2-miles of the White Rock Creek floodplain near theconfluence of three creeks and adjacent to approximately

  2. How's LEED doing?- Analyzing the Success of Dallas' Green Building Initiative

    E-Print Network [OSTI]

    Basora, Z.; Meckfessel, B.

    2013-01-01T23:59:59.000Z

    Platinum ESL-KT-13-12-09 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 City of Dallas Goals for LEED Program • Operating Costs: 30% energy reduction. • Education of citizens about benefits of sustainable design... LIBRARYPRAIRIE CREEK BRANCH LIBRARY DALLAS WEST BRANCH LIBRARY ESL-KT-13-12-09 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 Data UTILITY INFORMATION • Utility consumption and cost were normalized and compared on per...

  3. Professor David Archer

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible forPortsmouth/Paducah47,193.70 Hg Mercury 35 BrProcurementRaw MaterialsAprilHuman impacts

  4. Dallas, August 18-22 Volume 20, Number 4, 1986 THE RENDERING EQUATION

    E-Print Network [OSTI]

    Frey, Pascal

    Dallas, August 18-22 Volume 20, Number 4, 1986 THE RENDERING EQUATION James T. Kajiya California variety of known rendering algorithms. In the course of discussing a monte carlo solutionwe alsopresent reduction. CR CATEGORIES: 1.3.3,1.3.5,1.3.7 1. The rendering equation The technique we present subsumes

  5. The University of Texas at Dallas 1 Bachelor of Science in Geospatial

    E-Print Network [OSTI]

    O'Toole, Alice J.

    The University of Texas at Dallas 1 Bachelor of Science in Geospatial Information Sciences Geospatial information sciences (GISc) harness ground- breaking technologies to analyze features of the Earth range of fields to combine efforts on leading-edge research. Careers in Geospatial Information Sciences

  6. Test Access Mechanism for Core Based SystemonChip The Univ. of Texas at Dallas

    E-Print Network [OSTI]

    Nourani, Mehrdad

    1 Test Access Mechanism for Core Based System­on­Chip M. Nourani The Univ. of Texas at Dallas Dept of TAM for SoC's. The basic goal is to develop a global design for test methodology and tool for testing as their interactions to one another. More specifically, it al­ lows at­speed testing and multi­core interaction during

  7. The Relationship between Land Use and Temperature Change in Dallas County, Texas

    E-Print Network [OSTI]

    Kim, Hee Ju

    2010-10-12T23:59:59.000Z

    to the formation of urban heat islands based on different categories of land use. Specifically, this research analyzes the elements that contribute to the urban heat island effect in Dallas County using temperature data provided by remote sensing imagery and parcel...

  8. The University of Texas at Dallas Erik Jonsson School c C. D. Cantrell (06/1997)

    E-Print Network [OSTI]

    Hart, Gus

    The University of Texas at Dallas Erik Jonsson School PhoTEC c C. D. Cantrell (06/1997) FRESNEL. D. Cantrell (06/1997) FRESNEL-KIRCHHOFF DIFFRACTION THEORY (1) · Maxwell's equations imply. Cantrell (06/1997) FRESNEL-KIRCHHOFF DIFFRACTION THEORY (2) · The scalar wave equation, 2 - 1 v2 2 t2 U

  9. 9/25/10 12:27 PMLEED certification efforts remain strong -Dallas Business Journal Page 1 of 2http://www.bizjournals.com/dallas/stories/2010/08/02/story3.html?s=industry&b=1280721600%5E3731231&t=printable

    E-Print Network [OSTI]

    want LEED-certified buildings to save money on energy costs and to attract the nation's top talent9/25/10 12:27 PMLEED certification efforts remain strong - Dallas Business Journal Page 1 of 2http Larger Dallas Business Journal - August 2, 2010 /dallas/stories/2010/08/02/story3.html

  10. Spatial Ecology of and Public Attitudes toward Monk Parakeets Nesting on Electric Utility Structures in Dallas and Tarrant Counties, Texas

    E-Print Network [OSTI]

    Reed, Janet Elaine

    2014-07-29T23:59:59.000Z

    2013, we examined the spatial ecology of and public attitudes toward monk parakeets nesting on electric utility structures in Dallas and Tarrant counties, Texas, US. As nest sites, monk parakeets selected electric switchyards and substations...

  11. Petrologic and petrophysical evaluation of the Dallas Center Structure, Iowa, for compressed air energy storage in the Mount Simon Sandstone.

    SciTech Connect (OSTI)

    Heath, Jason E.; Bauer, Stephen J.; Broome, Scott Thomas; Dewers, Thomas A.; Rodriguez, Mark Andrew

    2013-03-01T23:59:59.000Z

    The Iowa Stored Energy Plant Agency selected a geologic structure at Dallas Center, Iowa, for evaluation of subsurface compressed air energy storage. The site was rejected due to lower-than-expected and heterogeneous permeability of the target reservoir, lower-than-desired porosity, and small reservoir volume. In an initial feasibility study, permeability and porosity distributions of flow units for the nearby Redfield gas storage field were applied as analogue values for numerical modeling of the Dallas Center Structure. These reservoir data, coupled with an optimistic reservoir volume, produced favorable results. However, it was determined that the Dallas Center Structure cannot be simplified to four zones of high, uniform permeabilities. Updated modeling using field and core data for the site provided unfavorable results for air fill-up. This report presents Sandia National Laboratories' petrologic and petrophysical analysis of the Dallas Center Structure that aids in understanding why the site was not suitable for gas storage.

  12. Modeling the per capita ecological footprint for Dallas County, Texas: Examining demographic, environmental value, land-use, and spatial influences

    E-Print Network [OSTI]

    Ryu, Hyung Cheal

    2005-08-29T23:59:59.000Z

    This study addresses factors driving the variation in the per capita Ecological Footprint (EF) in Dallas County, Texas. A main hypothesis was that scientifically estimated demography, environmental values, spatial attributes, and land-use patterns...

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

    E-Print Network [OSTI]

    North Central Texas Council of Governments

    2009-04-09T23:59:59.000Z

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

  14. Landslide susceptibility mapping for real estate development, tested along I-35, Dallas to San Antonio, Texas

    E-Print Network [OSTI]

    Gaidusek, Barbara Ursel Marie

    1982-01-01T23:59:59.000Z

    estate industry. In order to accomplish this objective, areas were field checked for slope instabilities within four major cities o- the Cretaceous belt: Dallas, Waco, Austin, and San Antonio. All clay formations in the study area were found...-De'I Rio Formation boundaries. Here the caprock tends to squeeze out the underlying clays; rockfalls of the overlying limestone occur. The Bergstrom, Del Rio and Eagle Ford Formations of San Antonio, and the Eagle Ford Formation of Austin have...

  15. Evaluation of the Dallas Thompson Riverscreen Site on the Touchet River.

    SciTech Connect (OSTI)

    Chamness, Mickie [Pacific Northwest National Laboratory

    2007-07-25T23:59:59.000Z

    Riverscreen irrigation pumps are a relatively new design in which the pump intake floats on the river surface, pulling water in only from the bottom side and surrounded by a self-cleaning screen. The Walla Walla County Conservation District recently started replacing old pump screens with the Riverscreen and was interested in whether the screens are protective of juvenile salmonids. Pacific Northwest National Laboratory evaluated approach velocities and operations at the Riverscreen installation on the Dallas Thompson property, approximately 3 mi. north of Touchet, Washington and 300 ft north of Hofer Dam, on June 18, 2007. Evaluation of this site consisted of underwater videography and water velocity measurements. The Dallas Thompson Riverscreen was pumping approximately 930 gpm during our evaluation, which is close to the maximum pumping rate for this model. Underwater videography showed only slow movement of water-borne particulates toward the pump intake, and the screen material was clean. All water velocity measurements were taken below the pump intake opening and between 3 to 6 in. from the screen face. All approach velocities (flow toward the screen and pump) were below National Marine Fisheries Service draft guidelines for juvenile fish screens.

  16. DRAFT UT DALLAS POLICY ON FINANCIAL EXIGENCY (Rev 3 MR 2010) The enunciation of a policy in Rule 31003, Section 1, of the Regents' Rules and Regulations

    E-Print Network [OSTI]

    O'Toole, Alice J.

    1 DRAFT UT DALLAS POLICY ON FINANCIAL EXIGENCY (Rev 3 MR 2010) Preamble The enunciation of a policy in Rule 31003, Section 1, of the Regents' Rules and Regulations (http://www.utsystem.edu/bor/rules.htm#A4

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

    E-Print Network [OSTI]

    Lawrence, Larry Ray

    1977-01-01T23:59:59.000Z

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

  18. Planets of young stars

    E-Print Network [OSTI]

    E. W. Guenther; E. Esposito

    2007-01-10T23:59:59.000Z

    Since the first massive planet in a short period orbit was discovered, the question arised how such an object could have formed. There are basically two formation scenarios: migration due to planet-disk or planet-planet interaction. Which of the two scenarios is more realistic can be found out by observing short-period planets of stars with an age between 10E7 and 10E8 yrs. The second aim of the survey is to find out how many planets originally formed, and how many of these are destroyed in the first Gyrs: Do most young, close-in planets evaporate, or spiral into the host stars? In here we report on the first results of a radial-velocity search program for planets of young stars which we began in 2004. Using HARPS, we currently monitor 85 stars with ages between 10E7 and 10E8 yrs. We show that the detection of planets of young stars is possible. Up to now, we have identified 3 planet-candidates. Taking this result together with the results of other surveys, we conclude that the frequency of massive-short period planets of young stars is not dramatically higher than that of old stars.

  19. Solar heating and hot water system installed at office building, One Solar Place, Dallas, Texas. Final report

    SciTech Connect (OSTI)

    Not Available

    1980-06-01T23:59:59.000Z

    This document is the Final Report of the Solar Energy System Installed at the First Solar Heated Office Building, One Solar Place, Dallas, Texas. The Solar System was designed to provide 87 percent of the space heating needs, 100 percent of the potable hot water needs and is sized for future absorption cooling. The collection subsystem consists of 28 Solargenics, series 76, flat plate collectors with a total area of 1596 square feet. The solar loop circulates an ethylene glycol-water solution through the collectors into a hot water system heat exchanger. The hot water storage subsystem consists of a heat exchanger, two 2300 gallon concrete hot water storage tanks with built in heat exchangers and a back-up electric boiler. The domestic hot water subsystem sends hot water to the 10,200 square feet floor area office building hot water fixtures. The building cold water system provides make-up to the solar loop, the heating loop, and the hot water concrete storage tanks. The design, construction, cost analysis, operation and maintenance of the solar system are described. The system became operational July 11, 1979.

  20. iccs-archer | netl.doe.gov

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

    to come. PAPERS AND PRESENTATIONS Sai Gollakota, Highlights of the DOE-Sponsored Major Carbon Sequestration Projects, Presented at the Association of Rural Electric Generating...

  1. JOHN W. ARCHER NATIONAL RADIO ASTRONOMY OBSERVATORY

    E-Print Network [OSTI]

    Groppi, Christopher

    , in conjunction with computer-aided analysis of the behavior of the non-linear varactor imped- ance, were used circuit requirements for the implementation of efficient frequency multi- pliers, then relates, the measured performance of the frequency multipliers is presented. ImPLEMENTATION Any non-linear impedance

  2. Archer Daniels Midland Company | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0 ARRA NewslettersPartnership of the

  3. A personal message from Bill Archer

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del(ANL-IN-03-032) -Less isNFebruaryOctober 2,generationPhysics Labthe

  4. Lynden Archer > Marjorie L. Hart Chair

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of Science (SC)Integrated Codes |IsLove Your Home and It'll Love You Back Love Yourphotophysics

  5. Research Councils UK Engaging Young

    E-Print Network [OSTI]

    Rambaut, Andrew

    Research Councils UK Engaging Young People with Cutting Edge Research: a guide for researchers to the feel-good factor researchers can have a hand in inspiring the next generation of researchers, to secure

  6. YOUNG GEOLOGY GEOLOGY OF THE

    E-Print Network [OSTI]

    Seamons, Kent E.

    YOUNG GEOLOGY UNIVERSITY May, 1962 GEOLOGY OF THE SOUTHERN WASATCH MOUNTAINS AND VICIN~IM,UTAH C O ....................J. Keith Rigby 80 Economic Geology of North-Central Utah ...,............... Kcnneth C.Bdodc 85 Rod Log ........................Lehi F. Hintze, J. Ka# Ri&, & ClydeT. Hardy 95 Geologic Map of Southern

  7. QER- Comment of Allen Young

    Broader source: Energy.gov [DOE]

    There is much that I can say about energy policy, but most important to me is the have no new infrastructure for fossil fuels, especially a proposed Kinder Morgan "northeast extension" pipeline through beautiful countryside in Massachusetts. There needs to be focus on renewables, plus conservation and efficiency. Allen Young

  8. Owning Hazard, A Tragedy Barbara Young Welke*

    E-Print Network [OSTI]

    Barrett, Jeffrey A.

    693 Owning Hazard, A Tragedy Barbara Young Welke* In Memory of Frances Young Welke (March 21, 1992 in the ownership of hazard from the individuals who suffered injury, to the enterprises involved in manufacturing

  9. Young Supernova Remnants: Issues and Prospects

    E-Print Network [OSTI]

    Christopher F. McKee

    2001-01-03T23:59:59.000Z

    After reviewing recent work on the dynamics of young supernova remnants (YSNRs) and discussing how YSNRs can be used as physics laboratories, I discuss several challenges: Where are the very young SNRs in the Galaxy? Can very young SNRs produce gamma ray bursts? The Connections Challenge: Can one infer the nature of the supernova and its progenitor star from observations of the YSNR?

  10. NREL: Energy Analysis - Katherine Young

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Saleshttp://www.fnal.gov/directorate/nalcal/nalcal02_07_05_files/nalcal.gifNRELPower SystemsDebbieJessica KatzKatherine Young, P.E.

  11. Young Dwarf Galaxies and Cosmology

    E-Print Network [OSTI]

    T. X. Thuan; Y. I. Izotov

    1999-02-25T23:59:59.000Z

    We develop here the theme that extremely metal-deficient Blue Compact Dwarf Galaxies (BCDs), those with Z < Zsun/20, are young galaxies which did not start to form stars until ~ 100 Myr ago. They can be thus considered as primeval galaxies in our local volume of the universe, and are excellent laboratories for studying physical processes occuring at the time of galaxy formation in very metal-deficient environments. We use BCDs to derive a new value of the primordial helium abundance Yp = 0.244+/-0.001, higher than previous determinations. This corresponds to a baryon mass fraction Omega_b*h^2_{50} = 0.058+/-0.007. We discuss the problem of dust in a very low-metallicity environment and show how a large fraction (~ 75%) of the young stars are not visible, and that any derivation of the cosmic star formation rate based only on optical/UV fluxes would be an underestimate. We also show how the loss of Ly-alpha photons from starburst regions puts strong constraints on Ly-alpha searches of high-redshift galaxies.

  12. Palatability of beef from young bulls

    E-Print Network [OSTI]

    Riley, Ray Renfrow

    1981-01-01T23:59:59.000Z

    beef; hower et, previous research (Adams and Arthaud, 1963; Aitken er al. , 1963; Reagan et al. , 1971; Gortsema et al. , 1974) has shown that meat from young bulls is not as tender as that from steers and that the palatability of young bull beef...

  13. MICHIGAN STATE UNIVERSITY YOUNG ALUMNI AWARD

    E-Print Network [OSTI]

    MICHIGAN STATE UNIVERSITY YOUNG ALUMNI AWARD The MSU Alumni Association annually seeks and accepts nominations for the Michigan State University YOUNG ALUMNI AWARD. The selection is made from candidates who high standards of integrity and character to positively reflect and enhance the prestige of Michigan

  14. Feeding Young Horses For Sound Development 

    E-Print Network [OSTI]

    Gibbs, Pete G.; Potter, Gary D.

    2005-05-25T23:59:59.000Z

    Feeding Young Horses for Sound Development B-5043 05-05 Feeding Young Horses for Sound Development Pete G. Gibbs Professor and Extension Horse Specialist Department Of Animal Science Equine Sciences Program The Texas A&M University System Gary D...

  15. Anglers needed - Save young salmon and reel in cash

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

    Power Administration funds the program. Pikeminnow represent about 80 percent of all fish that kill young salmon. So these young salmon need your help. Each angler counts. The...

  16. The effect of frequency on Young`s modulus and seismic wave attenuation

    SciTech Connect (OSTI)

    Price, R.H. [Sandia National Labs., Albuquerque, NM (United States). YMP Performance Assessment Applications Dept.; Martin, R.J. III; Haupt, R.W. [New England Research, Inc., White River Junction, VT (United States)

    1994-07-01T23:59:59.000Z

    Laboratory experiments were performed to measure the effect of frequency, water-saturation, and strain amplitude on Young`s modulus and seismic wave attenuation on rock cores recovered on or near the site of a potential nuclear waste repository at Yucca Mountain, Nevada. The purpose of this investigation is to perform the measurements using four techniques: cyclic loading, waveform inversion, resonant bar, and ultrasonic velocity. The measurements ranged in frequency between 10{sup {minus}2} and 10{sup 6} Hz. For the dry specimens Young`s modulus and attenuation were independent of frequency; that is, all four techniques yielded nearly the same values for modulus and attenuation. For saturated specimens, a frequency dependence for both Young`s modulus and attenuation was observed. In general, saturation reduced Young`s modulus and increased seismic wave attenuation. The effect of strain amplitude on Young`s modulus and attenuation was measured using the cyclic loading technique at a frequency of 10{sup {minus}1} Hz. The effect of strain amplitude in all cases was small. For some rocks, such as the potential repository horizon of the Topopah Spring Member tuff (TSw2), the effect of strain amplitude on both attenuation and modulus was minimal.

  17. Feeding Young Horses For Sound Development

    E-Print Network [OSTI]

    Gibbs, Pete G.; Potter, Gary D.

    2005-05-25T23:59:59.000Z

    mature. Figure 1. Example growth curve for young horses Some young horses must achieve rapid early growth to be competitive. Age (months) Rapid growth Moderate growth Body weight (pounds) 1185 385 585 785 985 0 4 8 12 16 20 24 28 32 36 6 7 The DOD complex... and vitamins relative to energy concentration may cause DOD in young horses. Protein quality, which means amino acid profile, is more important than total protein for growth promotion. 32 Deficiencies in certain trace minerals may contribute to DOD. 8...

  18. Dallam Sherman Hansford Ochiltree Lipscomb Hartley Hutchinson Roberts Hemphill

    E-Print Network [OSTI]

    Baylor Wilbarger Wichita Archer Kent Stonewall Haskell Throckmorton Young Stephens Clay Jack Montague Tom Green Concho Schleicher Val Verde Menard McCulloch Mason Llano San Saba Mills Lampasas Burnet West

  19. Hydrodynamics of jumping in archer fish, Toxotes microlepis

    E-Print Network [OSTI]

    Shih, Anna Margaret

    2010-01-01T23:59:59.000Z

    The maneuvering of fish is not only of interest to those wishing to better understand how fish function, but also is a great inspiration for designing underwater vehicles. This thesis provides the first characterization ...

  20. Archer County, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia: Energy Resources JumpAnaconda,Anza

  1. Mr. Frank Archer President Niagara Cold Drawn Steel Corporation

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA groupTuba City, Arizona, DisposalFourth Five-Year38Report3Department of Energy

  2. EFFECTS OF SOUND WAVES ON YOUNG SALMON

    E-Print Network [OSTI]

    EFFECTS OF SOUND WAVES ON YOUNG SALMON Marine Biological Laboratory X. 1 33 R A. RTT ir.':; WOODS instantaneously to sounds. It was con- were tested in an experimental tank and in eluded that sound waves were, Wash . sound studies conducted under the above contract are terminated. #12;EFFECTS OF SOUND WAVES

  3. , UNIVERSITY Brigham Young University Geology Studies

    E-Print Network [OSTI]

    Seamons, Kent E.

    , UNIVERSITY #12;Brigham Young University Geology Studies Volume 1 5 - 1968 Part 2 Studies for Students No. 1 Guide to the Geology of the Wasatch Mountain Front, Between Provo Canyon and Y Mountain, Northeast of Provo, Utah by J. Keith Rigby and Lehi F. Hintze #12;A publication of the Department of Geology

  4. A Cure For Obesity Professor Terry Young

    E-Print Network [OSTI]

    Young, Terence

    A Cure For Obesity Professor Terry Young Parks and Protected Areas GEO 435 Aaron Gire #12;A Cure for Obesity Introduction: Many cities in Los Angeles County have an ever-growing population affected by obesity (Los Angeles County Department of Public Health, 2011). A person is considered to be obese

  5. SPECTRAL PICTURES OF AB AND BA Robin Harte, Young Ok Kim and Woo Young Lee

    E-Print Network [OSTI]

    Lee, Woo Young

    ;2 ROBIN HARTE, YOUNG OK KIM AND WOO YOUNG LEE If A B(X), write (A), left (A), right (A), ess(A), left ess (A), and right ess (A) for the spectrum, the left spectrum, the right spectrum, the essential(X), a hole in ess(A) is a bounded component of C \\ ess(A) and a pseudohole in ess(A) is a component of ess

  6. Designing for Homeless Young People: Precaution in Ubiquitous Computing

    E-Print Network [OSTI]

    Anderson, Richard

    , academics, and many others. Less obviously, homeless young people, unlike these other people, actually liveDesigning for Homeless Young People: Precaution in Ubiquitous Computing Abstract How should ubiquitous access to information through computing be shaped to improve the lives of homeless young people

  7. BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 26, Part 4

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 26, Part 4 The Fossil Vertebrates of Utah Salt Lake Gty, Utah 84102 W .E. Miller Deparlment~of Geology and Zoology Bngham Young Unrwerrrly Provo of Geology Brigham Young University Provo, Utah 84602 Editors W. Kenneth Hamblln Cynthia M. Gardner Issue

  8. Lifestyle, identity and young people's experiences of mountain biking

    E-Print Network [OSTI]

    Lifestyle, identity and young people's experiences of mountain biking It has been widely recognised emphasis on young people as a key target group. Mountain biking, as a popular youth sport that often occurs biking and to investigate the resulting relation- ships young people developed with countryside spaces

  9. GRADUATE STUDIES IN CHEMICAL ENGINEERING Brigham Young University

    E-Print Network [OSTI]

    Martinez, Tony R.

    GRADUATE STUDIES IN CHEMICAL ENGINEERING Brigham Young University Graduate Student Handbook The Department of Chemical Engineering 350 Clyde Building Brigham Young University Provo, Utah 84602 Phone: (801 Engineering at Brigham Young University, I am pleased to welcome you to the department. We are anxious

  10. YOUNG RADIO PULSARS IN GALACTIC GLOBULAR CLUSTERS

    SciTech Connect (OSTI)

    Boyles, J.; Lorimer, D. R. [Department of Physics, 210 Hodges Hall, West Virginia University, Morgantown, WV 26506 (United States); Turk, P. J.; Mnatsakanov, R. [Department of Statistics, 423 Hodges Hall, West Virginia University, Morgantown, WV 26506 (United States); Lynch, R. S. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States); Ransom, S. M. [National Radio Astronomy Observatory, 520 Edgemont Rd, Charlottesville, VA (United States); Freire, P. C. [Max-Planck-Institut fuer Radioastronomie, Auf dem Huegel D-53121, Bonn (Germany); Belczynski, K. [Astronomical Observatory, University of Warsaw, AL Ujazdowskie 4,00-478, Warsaw (Poland)

    2011-11-20T23:59:59.000Z

    Currently three isolated radio pulsars and one binary radio pulsar with no evidence of any previous recycling are known in 97 surveyed Galactic globular clusters (GCs). As pointed out by Lyne et al., the presence of these pulsars cannot be explained by core-collapse supernovae, as commonly assumed for their counterparts in the Galactic disk. We apply a Bayesian analysis to the results from surveys for radio pulsars in GCs and find the number of potentially observable non-recycled radio pulsars present in all clusters to be <3600. Accounting for beaming and retention considerations, the implied birthrate for any formation scenario for all 97 clusters is <0.25 pulsars century{sup -1} assuming a Maxwellian distribution of velocities with a dispersion of 10 km s{sup -1}. The implied birthrates for higher velocity dispersions are substantially higher than inferred for such pulsars in the Galactic disk. This suggests that the velocity dispersion of young pulsars in GCs is significantly lower than those of disk pulsars. These numbers may be substantial overestimates due to the fact that the currently known sample of young pulsars is observed only in metal-rich clusters. We propose that young pulsars may only be formed in GCs with metallicities with log[Fe/H] > - 0.6. In this case, the potentially observable population of such young pulsars is 447{sup +1420}{sub -399} (the error bars give a 95% confidence interval) and their birthrate is 0.012{sup +0.037}{sub -0.010} pulsars century{sup -1}. The most likely creation scenario to explain these pulsars is the electron capture supernova of an OMgNe white dwarf.

  11. Young and Older Adults’ Reading of Distracters

    E-Print Network [OSTI]

    Kemper, Susan; McDowd, Joan; Metcalf, Kim; Liu, Chiung-Ju

    2008-05-01T23:59:59.000Z

    . Psychology and Aging , 22, 84-94. Kemper, S., & McDowd, J. (2006). Eye movements of young and older adults while reading with distraction. Psychology and Aging, 21, 32-39. Kucera, H., & Francis, W.N. (1967). Computational Analysis of Present-Day American... English. Providence: Brown University Press. Lavie, N., (1995). Perceptual load as a necessary condition for selective attention. Journal of Experimental Psychology: Human Perception and Performance, 21, 451-468. Maylor, E. A., & Lavie, N. (1998...

  12. Young stars and clouds in Camelopardalis

    E-Print Network [OSTI]

    V. Straizys; V. Laugalys

    2008-11-18T23:59:59.000Z

    Star formation in the Local spiral arm in the direction of the Galactic longitudes 132--158 deg is reviewed. Recent star-forming activity in this Milky Way direction is evidenced by the presence here of the Cam OB1 association and dense dust and molecular clouds containing H$\\alpha$ emission stars, young irregular variables and infrared stellar objects. The clouds of the Local arm concentrate in two layers at 150-300 pc and at about 900 pc from the Sun. The Perseus arm objects in this direction are at a distance of about 2 kpc.

  13. Young Energy, LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty Edit withTianlinPapers HomeXuanenYongzhou Zhongxin Hydropower Development CoYoudaYoung

  14. Nurturing young children's curiosity about the universe

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What's Possible for Renewable Energy:Nanowire3627 Federal RegisterImplementation3D SpatialNurturing young

  15. Adam Young | Argonne Leadership Computing Facility

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisiting the TWP TWP Related LinksATHENA AccountManagement |ARQ AAdYoung Guest

  16. Young Inventor Award | GE Global Research

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengtheningWildfires may contributeSecuritysupportsEnergy You Asked,Young

  17. I'm Too Young for This: Adolescent and Young Adult Cancer Survivorship

    E-Print Network [OSTI]

    Vollmer Dahlke, Deborah

    2014-07-25T23:59:59.000Z

    As of January 1, 2012, an estimated 13.7 million cancer survivors were alive in the United States. The number of cancer survivors is expected to reach 18 million by the year 2022. Adolescent and Young Adult (AYA) cancer survivors, ages 15-39, are a...

  18. australian young adults: Topics by E-print Network

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

    theatre to construct a participatory creative space for Indigenous Australian young people . Open Access Theses and Dissertations Summary: ??This thesis investigates the use of...

  19. STEM Mentoring Café- Engaging Young Women in an Authentic Mentoring...

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

    Engaging Young Women in an Authentic Mentoring Experience Melinda Higgins Albert Einstein Distinguished Educator Fellow, NASA Office of Education, Headquarters and Goddard...

  20. Calling all Young Entrepreneurs: Deadline for Energy Department...

    Office of Environmental Management (EM)

    5, 2012 Addthis Related Articles Department of Energy Awards 2 Million for National University Clean Energy Business Challenge to Jump Start Young Entrepreneurship Funding...

  1. active young females: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  2. asymptomatic young adults: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  3. anaemic young children: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  4. akwesasne mohawk young: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  5. asymptomatic young women: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  6. Structure and Stratigraphy Beneath a Young Phreatic Vent: South...

    Open Energy Info (EERE)

    Caldera, California Jump to: navigation, search OpenEI Reference LibraryAdd to library Journal Article: Structure and Stratigraphy Beneath a Young Phreatic Vent: South Inyo Crater,...

  7. Brigham Young University Geology Studies Volume 28, Part 2

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 28, Part 2 Lower and Middle Ordovician at Section G, Ibex, Utah. #12;A publication of the Department of Geology Brigham Young University Provo, Utah o ~ l z gUfziversity Geology Studies is published by the Department of Geology. This publication

  8. Brigham Young University Geology Studies Volume 26, Part I

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 26, Part I Papers presented at the 31st annual meeting, Rocky Mountain Section, Geological Society of America, April 28-29, 1978, at Brig- ham Young ............................................................................................................................Publications and Maps of the Geology Department 91 Cover The Great Basrn seen from a htgh

  9. Brigham Young University Geology Studies Volume 25, Part 3

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 25, Part 3 CONTENTS Remains of Ornithopod ...........................................................................................................................................................ames M. Stolle Publications and Maps of the Geology Department Index to volumes 21-25 of Brigham Young University Geology Studies ........................................Carol T . Smith and Nathan M. Smith Cwec

  10. Brigham Young University Geology Studies Volume 26, Part 2

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 26, Part 2 CONTENTS A New Large Theropod................................................................................................................................................................ Danny J. Wyatt Publications and Maps of the Geology Department Cover: Cretaceouscoals near Castle Gate, Utab. #12;A publication of the Department of Geology Brigham Young University Provo, Utah 84602 Editors

  11. Brigham Young University Geology Studies Volume 26, Part 3

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;P I - #12;Brigham Young University Geology Studies Volume 26, Part 3 Conodont Biostratigraphy-meeting field trip held in conjunction with the Rocky Mountain section, Geological Society of America of the Department of Geology Brigham Young University Provo, Utah 84602 Editors W. Kenneth Hamblin Cynthia M

  12. GRADUATE STUDIES IN CHEMICAL ENGINEERING Brigham Young University

    E-Print Network [OSTI]

    Olsen Jr., Dan R.

    GRADUATE STUDIES IN CHEMICAL ENGINEERING Brigham Young University Graduate Student Handbook The Department of Chemical Engineering 350 Clyde Building Brigham Young University Provo, Utah 84602 Phone: (801;2 To the New Graduate Student, On behalf of the faculty and staff of the Department of Chemical Engineering

  13. No User Required: Young-Hae Chang Heavy Industries and Digital Humanist Inquiry

    E-Print Network [OSTI]

    Solomon, Dana

    2009-01-01T23:59:59.000Z

    Young-Hae Chang Heavy Industries and Digital Modernism. In4] Young-Hae Chang Heavy Industries. Selected works: Nippon,Young-Hae Chang Heavy Industries and Digital Humanist

  14. Posthuman Difference: Traveling to Utopia with Young-Hae Chang Heavy Industries

    E-Print Network [OSTI]

    Liu, Warren

    2012-01-01T23:59:59.000Z

    with Young-Hae Chang Heavy Industries WARREN LIU In a 2007Young-Hae Chang Heavy Industries’ Traveling to Utopia: Withof Young-Hae Chang Heavy Industries’ digital text, Traveling

  15. Extended emission associated with young HII regions

    E-Print Network [OSTI]

    S. P. Ellingsen; S. S. Shabala; S. E. Kurtz

    2004-12-06T23:59:59.000Z

    We have used the Australia Telescope Compact Array (ATCA) to make observations of a sample of eight young ultra-compact HII regions, selected on the basis that they have associated class II methanol maser emission. We have made observations sensitive to both compact and extended structures and find both to be present in most sources. The scale of the extended emission in our sample is in general less than that observed towards samples based on IRAS properties, or large single-dish flux densities. Our observations are consistent with a scenario where extended and compact radio continuum emission coexists within HII regions for a significant period of time. We suggest that these observations are consistent with a model where HII evolution takes place within hierarchically structured molecular clouds. This model is the subject of a companion paper (Shabala et al. 2005) and addresses both the association between compact and extended emission and UCHII region lifetime problem.

  16. SED modeling of Young Massive Stars

    E-Print Network [OSTI]

    Thomas P. Robitaille

    2007-11-27T23:59:59.000Z

    In this contribution, I review the applications and potential limitations of the spectral energy distribution fitting tool that I have developed, with a strong emphasis on the limits to which this tool can be used to improve our understanding of massive star formation. I discuss why our current grid of models cannot be used to distinguish between the several competing theories of massive star formation. I also discuss stellar mass determinations, artificial correlations between parameters in the grid of models, multiplicity, confusion, dust assumptions, and unique fits. I briefly review the improvements we intend to carry out for our next grid of models, which will eliminate many of these limitations. Finally, I show examples of applications of this tool to massive young stars.

  17. Honeywell Young Innovator Award 2012 Team of Criti Mahajan and Ritubhan Gautam from IIT Delhi won the Honeywell Young

    E-Print Network [OSTI]

    Kumar, M. Jagadesh

    Honeywell Young Innovator Award 2012 Team of Criti Mahajan and Ritubhan Gautam from IIT Delhi won the Honeywell Young Innovator Challenge for their entry titled "Blue Energy" (reverse electrodialysis called for the final at Honeywell Bangalore campus. On the day of the university relations day

  18. Black holes in young stellar clusters

    SciTech Connect (OSTI)

    Goswami, Sanghamitra; Kiel, Paul; Rasio, Frederic A. [Department of Physics and Astronomy, Northwestern University, Evanston, IL 60208 (United States)

    2014-02-01T23:59:59.000Z

    We present theoretical models for stellar black hole (BH) properties in young, massive star clusters. Using a Monte Carlo code for stellar dynamics, we model realistic star clusters with N ? 5 × 10{sup 5} stars and significant binary fractions (up to 50%) with self-consistent treatments of stellar dynamics and stellar evolution. We compute the formation rates and characteristic properties of single and binary BHs for various representative ages, cluster parameters, and metallicities. Because of dynamical interactions and supernova (SN) kicks, more single BHs end up retained in clusters compared to BHs in binaries. We also find that the ejection of BHs from a cluster is a strong function of initial density. In low-density clusters (where dynamical effects are negligible), it is mainly SN kicks that eject BHs from the cluster, whereas in high-density clusters (initial central density ? {sub c}(0) ? 10{sup 5} M {sub ?} pc{sup –3} in our models) the BH ejection rate is enhanced significantly by dynamics. Dynamical interactions of binary systems in dense clusters also modify the orbital period and eccentricity distributions while increasing the probability of a BH having a more massive companion.

  19. Clouds and the Faint Young Sun Paradox

    E-Print Network [OSTI]

    Goldblatt, Colin

    2011-01-01T23:59:59.000Z

    We investigate the role which clouds could play in resolving the Faint Young Sun Paradox (FYSP). Lower solar luminosity in the past means that less energy was absorbed on Earth (a forcing of -50 Wm-2 during the late Archean), but geological evidence points to the Earth being at least as warm as it is today, with only very occasional glaciations. We perform radiative calculations on a single global mean atmospheric column. We select a nominal set of three layered, randomly overlapping clouds, which are both consistent with observed cloud climatologies and reproduce the observed global mean energy budget of Earth. By varying the fraction, thickness, height and particle size of these clouds we conduct a wide exploration of how changed clouds could affect climate, thus constraining how clouds could contribute to resolving the FYSP. Low clouds reflect sunlight but have little greenhouse effect. Removing them entirely gives a~forcing of +25 Wm-2 whilst more modest reduction in their efficacy gives a forcing of +10 ...

  20. BRIGHAM YOUNG UNIVERSITY J. REUBEN CLARK LAW SCHOOL

    E-Print Network [OSTI]

    Seamons, Kent E.

    -6) ...........................................................13 C. Credit for Co-Curricular (Law 793R §§1BRIGHAM YOUNG UNIVERSITY J. REUBEN CLARK LAW SCHOOL Policies and Procedures March 2013 #12;Table ................................................................................1 C. Speakers

  1. BRIGHAM YOUNG UNIVERSITY J. REUBEN CLARK LAW SCHOOL

    E-Print Network [OSTI]

    Seamons, Kent E.

    -6) ...........................................................13 C. Credit for Co-Curricular (Law 793R §§1BRIGHAM YOUNG UNIVERSITY J. REUBEN CLARK LAW SCHOOL Policies and Procedures November 2012 #12;Table ................................................................................1 C. Speakers

  2. BRIGHAM YOUNG UNIVERSITY J. REUBEN CLARK LAW SCHOOL

    E-Print Network [OSTI]

    Seamons, Kent E.

    -6) ...........................................................13 C. Credit for Co-Curricular (Law 793R §§1BRIGHAM YOUNG UNIVERSITY J. REUBEN CLARK LAW SCHOOL Policies and Procedures September 2011 (Revised ................................................................................1 C. Speakers

  3. Brigham Young University Geology Studies Volume 28, Part 3

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 28, Part 3 CONTENTS Three Creeks Caldera ................................................................................................................................... Scott Dean Geology of the Antelope Peak Area of the Southern .................................................................................................................. Craig D. Hall Geology of the Longlick and White Mountain Area, Southern San Francisco Mountains

  4. BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 27, Part I

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 27, Part I Preble Formation, a Cambrian Outer ..........................................................................J. Roger Olsen Geology of the Sterling Quadrangle, Sanpete County, Utah ..............................................................................James Michael Taylor Publications and Maps of the Geology Department Cover: Aertalphorograph rhowing

  5. Exclosure size affects young blue oak seedling growth

    E-Print Network [OSTI]

    Phillips, Ralph L.; McDougald, Neil K.; Atwill, Edward R.; McCreary, Doug

    2007-01-01T23:59:59.000Z

    in?uences rodent damage to blue oaks. Oaks ’N Folks tat.Exclosure size affects young blue oak seedling growth byR. Atwill and Doug McCreary Blue oak, a tree native only to

  6. Lithium: Measurement of Young's Modulus and Yield Strength

    SciTech Connect (OSTI)

    Ryan P Schultz

    2002-11-07T23:59:59.000Z

    The Lithium Collection Lens is used for anti-proton collection. In analyzing the structural behavior during operation, various material properties of lithium are often needed. properties such as density, coefficient of thermal expansion, thermal conductivity, specific heat, compressability, etc.; are well known. However, to the authors knowledge there is only one published source for Young's Modulus. This paper reviews the results from the testing of Young's Modulus and the yield strength of lithium at room temperature.

  7. City of Dallas Green Building Case Study

    E-Print Network [OSTI]

    Basora, Z.

    2012-01-01T23:59:59.000Z

    of the city?s green building and energy management policies ?Update of green building policy in 2006 to require a minimum compliance of LEED Gold and incorporation of carbon neutrality goals ? Implementation of training programs on sustainability for city... Roofs for slopes 2:12 or less to meet EPA ENERGY STAR, or ? Install a green/vegetated roof that covers at least 50% of the roof area with the remainder following the Cool Roof requirement for slopes 2:12 or less ?Outdoor Lighting restriction 14...

  8. Prairie Creek Branch Public Library, Dallas

    E-Print Network [OSTI]

    Meckfessel, R.

    2011-01-01T23:59:59.000Z

    and structural engineering Jaster-Quintanilla commissioning Apollo BBC architects / interior designers DSGN Associates ? smart orientation/massing ? sound stormwater mgmt ? indoor environment quality civic budgets mandate common-sense sustainability...

  9. Jefferson Lab Leadership Council - Michael Dallas

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12 InvestigationLab GroupHumanLaserMichaelChief Operating

  10. Dallas, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2,AUDIT REPORTEnergy Offshore Place:WindOilCowal WindDakshidin Ltd Jump

  11. CANDIDATES FOR THE YOUNG STELLAR OUTFLOWS: WATER AND METHANOL MASERS FROM YOUNG STELLAR OBJECTS

    SciTech Connect (OSTI)

    Lim, Wanggi; Lyo, A-Ran; Kim, Kee-Tae; Byun, Do-Young [Korea Astronomy and Space Science Institute, Daedeok Street 776, Yuseong-Gu, 305-348 Daejeon (Korea, Republic of)

    2012-11-01T23:59:59.000Z

    We conducted simultaneous 22 GHz water maser and 44 GHz class I methanol maser surveys of newly identified 282 H{sub 2} emission features from the 2.122 {mu}m H{sub 2} narrowband image survey in the Galactic plane (UWISH2 project) using Korean VLBI Network 21 m radio telescopes. We detected 16 and 13 new water and methanol maser sources, respectively. This result indicates that at least {approx}5% of the H{sub 2} emission features originate from young stellar objects (YSOs) that are in the right physical condition to produce the water and methanol masers. The masers are closely related to the current outflow activities in the Galactic plane. The power sources of these 23 diffused/collimated H{sub 2} emission features (six sources are detected for both masers) are likely to be intermediate- to high-mass YSOs, based on a comparison with the maser luminosities of other well-studied YSOs. Both maser velocities are mostly close to their own systemic velocities within {approx}<5 km s{sup -1}, even though water masers generally show larger variabilities in the intensity, velocity, and shape than methanol masers. We also discovered three new water maser sources with high-velocity components: {approx}25 km s{sup -1} redshifted CMHO 019, {approx}50 km s{sup -1} blueshifted CMHO 132, and {approx}120 km s{sup -1} blueshifted CMHO 182. In particular, we propose that the dominant blueshifted water maser of CHMO 182 can be a unique laboratory for the study of the high-mass young stellar jet and its acceleration.

  12. Eclipsing Binaries in the Young LMC Cluster NGC 1850

    E-Print Network [OSTI]

    Stuart F. Taylor

    2004-10-21T23:59:59.000Z

    I present light curves for two detached eclipsing binary stars in the region of the LMC cluster NGC 1850, which is possibly a young globular cluster still in formation. One, a likely spectral type O star, is a newly detected eclipsing binary in the region of the very young subcluster NGC 1850A. This binary is among a small number of highly massive O-type stars in binary systems found in LMC clusters. These two eclipsing binaries are the first discovered in the well studied NGC 1850, and the O-type star is the first eclisping binary found in NGC 1850A. Light curves for two NGC 1850 region Cepheid variables are also shown. Discovering two eclipsing binaries in the young globlular-like cluster NGC 1850 is discussed in terms of the importance of the binary fraction to globular cluster evolution.

  13. Acceleration of wound healing in young and aged rats 

    E-Print Network [OSTI]

    Maxwell, Bryan Douglas

    1996-01-01T23:59:59.000Z

    1. The effect of ACM on wound healing in young rats. . Page 15 2. The effect of ACM on wound healing in old, ad-lib rats . . . . . . . 17 3. The effect of ACM on wound healing in old, caloric-restricted rats . . . 4. The effect of old and young... group (AL) had been fed a laboratory diet ad libitum during their lifetime. The other group (CR) had been maintained on a calorie-restricted diet at a level of 60% of the food intake of the ad libitum-fed group. This decrease in caloric intake resulted...

  14. THE FORMATION OF YOUNG DENSE STAR CLUSTERS THROUGH MERGERS

    SciTech Connect (OSTI)

    Fujii, M. S.; Portegies Zwart, S. F. [Leiden Observatory, Leiden University, NL-2300RA Leiden (Netherlands); Saitoh, T. R. [Interactive Research Center of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8551 (Japan)

    2012-07-01T23:59:59.000Z

    Young star clusters such as NGC 3603 and Westerlund 1 and 2 in the Milky Way and R136 in the Large Magellanic Cloud are dynamically more evolved than expected based on their current relaxation times. In particular, the combination of a high degree of mass segregation, a relatively low central density, and the large number of massive runaway stars in their vicinity are hard to explain with the monolithic formation of these clusters. Young star clusters can achieve such a mature dynamical state if they formed through the mergers of a number of less massive clusters. The shorter relaxation times of less massive clusters cause them to dynamically evolve further by the time they merge, and the merger product preserves the memory of the dynamical evolution of its constituent clusters. With a series of N-body simulations, we study the dynamical evolution of single massive clusters and those that are assembled through merging smaller clusters together. We find that the formation of massive star clusters through the mergers of smaller clusters can reproduce the currently observed spatial distribution of massive stars, the density, and the characteristics (number and mass distribution) of the stars ejected as runaways from young dense clusters. We therefore conclude that these clusters and possibly other young massive star clusters formed through the mergers of smaller clusters.

  15. Press Releases and News BT-Citibank Young Investors' Forum

    E-Print Network [OSTI]

    Chaudhuri, Sanjay

    Researcher, Prof. Joseph Cherian Business Time, Singapore 20 June 2011 Several factors make this investment of the major investment asset classes out there. For young retail investors, pumping money direct into corn or oil, or buying shares in a far-off land can be daunting. So over the next few Mondays, we'll look

  16. Building Knowledge about Buildings Matthew T. Young and Eyal Amir

    E-Print Network [OSTI]

    Amir, Eyal

    Building Knowledge about Buildings Matthew T. Young and Eyal Amir University of Illinois, Urbana The ability to encode information about the structure of buildings is essential for the development of applications which are able to reason about buildings and answer queries concerning their design and function

  17. 111Screening Young Children for Lead Poisoning Chapter 5: Resources

    E-Print Network [OSTI]

    for providers. For use by health departments in preparing materials for health-care providers, this template- tional Health and Nutrition Examination Survey #12;113Screening Young Children for Lead Poisoning Chapter levels in the U.S. population: phase 1 of the Third National Health and Nutrition Examination Survey

  18. BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 27, Part 3

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 27, Part 3 CONTENTS Studies for Students #lo, Geologic Guide to Provo Canyon and Weber Canyon, Central Wasatch Mountains, Utah ............................................................................................................................. Randy L. Chamberlain The Geology of the Drum Mountains, Millard and Juab Counties, Utah

  19. Brigham Young University Geology Studies Volume 27, Part 2

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 27, Part 2 CONTENTS The Kinnikinic Quartzite ........................................................Robert Q. Oaks,Jr., and W . Calvin James Geology of the Sage Valley 7 W'Quadrangle, Caribou County, Idaho, and Lincoln County, Wyoming ....................J ohn L. Conner Geology of the Elk Valley Quadrangle, Bear

  20. Brigham Young University Geology Studies Volume 24, Part 2

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 24, Part 2 CONTENTS Studies for Students ............................................................................................................................... Robert C. Ahlborn Publications and Maps of the Geology Department Cover: Sahara dune sand, X130. Photo, Univer~ityof Cincinnati, Cincinnati, Ohio 45221. #12;A publication of the Department of Geology Brigham

  1. Brigham Young University Geology Studies Volume 29, Part 2

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 29, Part 2 CONTENTS Stratigraphy ...................................................................................................... Terry C. Gosney 27 Geology of the Champlin Peak Quadrangle,Juab and Millard Counties, Utah ..................................................................................................................................... David R. Keller 103 Publications and Maps of the Department of Geology 117 Cover: Rafted orjoreign

  2. BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 25,Part 1

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 25,Part 1 Papers reviewing geology of field trip areas, 31st annual meeting, Rocky Mountain Section, Geological Society of America, April 28 ....................................................................................................................................................... Geology of Volcanic Rocks and Mineral Deposits in the Southern Thomas Range, Utah: A Brief Summary

  3. Brigham Young University Geology Studies Volume 30, Part 1

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 30, Part 1 CONTENTS Diagenetic Aspects ................................................................................................... Steven G. Driese Geology of the Dog Valley-Red Ridge Area, Southern Pavant Mountains, Millard County .................................................................................................. Lynn C Meibos Geology of the Southwestern Quarter of the Scipio North (15-Minute) Quadrangle, Millard

  4. VOLUMF -31, PART 1 BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES

    E-Print Network [OSTI]

    Seamons, Kent E.

    Y O U N G VOLUMF -31, PART 1 #12;BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES VOLUME 31.PART 1 CONTENTS .................................................................. Ralph E.Lambert Geology of the Mount Ellen Quadrangle. Henry Mountains. Garfield County. Utah near White Horse Pass. Elko County. Nevada ............Stephen M Smith Geology of the Steele Butte

  5. Carbon Storage in Young Growth Coast Redwood Stands

    E-Print Network [OSTI]

    Standiford, Richard B.

    515 Carbon Storage in Young Growth Coast Redwood Stands Dryw A. Jones1 and Kevin L. O'Hara1 Abstract Carbon sequestration is an emerging forest management objective within California and around the dynamics of carbon sequestration and to accurately measure carbon storage is essential to insure successful

  6. FutureGrid User Support Gregory Pike, Andrew Younge,

    E-Print Network [OSTI]

    FutureGrid User Support Gregory Pike, Andrew Younge, Gregor von Laszewski, Fugang Wang, Javier Diaz, Archit Kulshrestha, Geoffrey Fox Indiana University #12;Tiered Support Model Knowledge Base Manuals Documentation Knowledge Base, Manuals, Tutorials, Ticket System, Inca, GNOC status Tier 1: Support through

  7. Random Young Diagrams in a Rectangular Box Dan Beltoft

    E-Print Network [OSTI]

    - portional to the exponential of their area (grand-canonical ensemble), and confined in a rectangular box for the unconfined case lead to a two-sided stationary Ornstein-Uhlenbeck process. Keywords: Young diagrams, Gauss of the classical Gauss polynomials, well- known in combinatorics as the generating functions for the number

  8. Young media-induced travelers: online representations of media-induced travel conversations

    E-Print Network [OSTI]

    Scarpino, Michelle Renee

    2009-05-15T23:59:59.000Z

    and their growing propensity toward travel and tourism, there has been relatively little to no attention paid towards young travelers’ use of the Internet as a multifaceted travel information source. This thesis focused on broadening our knowledge of young travelers...

  9. Thomas Young's research on fluid transients: 200 years on Arris S Tijsseling Alexander Anderson

    E-Print Network [OSTI]

    Eindhoven, Technische Universiteit

    diameter, m E Young's modulus, Pa e tube wall thickness, m f elastic limit, Pa g gravitational acceleration of physical laws and mathematical results. As will be shown, Young was one of the last proponents

  10. The Effects of Varying Task Priorities on Language Production by Young and Older Adults

    E-Print Network [OSTI]

    Kemper, Susan; Schmalzried, RaLynn Cheri; Herman, Ruth; Mohankumar, Deepthi

    2011-02-01T23:59:59.000Z

    The present study compared how varying task priorities affected young and older adults' language production. Both young and older adults responded to monetary incentives to vary their performance when simultaneously talking ...

  11. On the polar cap cascade pair multiplicity of young pulsars

    E-Print Network [OSTI]

    Timokhin, A N

    2015-01-01T23:59:59.000Z

    We study the efficiency of pair production in polar caps of young pulsars under a variety of conditions to estimate the maximum possible multiplicity of pair plasma in pulsar magnetospheres. We develop a semi-analytic model for calculation of cascade multiplicity which allows efficient exploration of the parameter space and corroborate it with direct numerical simulations. Pair creation processes are considered separately from particle acceleration in order to assess different factors affecting cascade efficiency, with acceleration of primary particles described by recent self-consistent non-stationary model of pair cascades. We argue that the most efficient cascades operate in the curvature radiation/synchrotron regime, the maximum multiplicity of pair plasma in pulsar magnetospheres is ~few x 10^5. The multiplicity of pair plasma in magnetospheres of young energetic pulsars weakly depends on the strength of the magnetic field and the radius of curvature of magnetic field lines and has a stronger dependence ...

  12. Ultrasonic evaluation of carcass traits in young Brangus bulls

    E-Print Network [OSTI]

    Hicks, Gerald Don

    1996-01-01T23:59:59.000Z

    Evaluation of Carcass Traits in Young Brangus Bulls. (May 1996) Gerald Don Hicks, B. S. , Texas AdrM Chair of Advisory Committee: Dr. H. R. Cross In Phase I, growth performance and serial ultrasound data were collected and analyzed on 194 Brangus bulls... an inspiration to me. Special thanks to Dr. Dan S. Hale for his Christian &iendship, encouragement and willingness to always take time to listen. Special thanks also to Wendy Schutt for her friendship, editing assistance and motivation she provided...

  13. Production of high-energy ?neutrinos from young neutron stars

    E-Print Network [OSTI]

    G. F. Burgio; B. Link

    2006-09-20T23:59:59.000Z

    Young, rapidly rotating neutron stars could accelerate protons to energies of $\\sim 1$ PeV close to the stellar surface, which scatter with x-rays from the stellar surface through the $\\Delta$ resonance and produce pions. The pions subsequently decay to produce muon neutrinos. We find that the energy spectrum of muon neutrinos consists of a sharp rise at $\\sim 50$ TeV, corresponding to the onset of the resonance, above which the flux drops as $\\epsilon_\

  14. Gravitational wave emission and spin-down of young pulsars

    SciTech Connect (OSTI)

    Alford, Mark G.; Schwenzer, Kai [Department of Physics, Washington University, St. Louis, MO 63130 (United States)

    2014-01-20T23:59:59.000Z

    The rotation frequencies of young pulsars are systematically below their theoretical Kepler limit. r-modes have been suggested as a possible explanation for this observation. With the help of semi-analytic expressions that make it possible to assess the uncertainties of the r-mode scenario due to the impact of uncertainties in underlying microphysics, we perform a quantitative analysis of the spin-down and the emitted gravitational waves of young pulsars. We find that the frequency to which r-modes spin-down a young neutron star (NS) is surprisingly insensitive to both the microscopic details and the saturation amplitude. Comparing our result to astrophysical data, we show that for a range of sufficiently large saturation amplitudes r-modes provide a viable spin-down scenario and that all observed young pulsars are very likely already outside the r-mode instability region. Therefore, the most promising sources for gravitational wave detection are unobserved NSs associated with recent supernovae, and we find that advanced LIGO should be able to see several of them. Our analysis shows that despite the coupling of the spin-down and thermal evolution, a power-law spin-down with an effective braking index n {sub rm} ? 7 is realized. Because of this, the gravitational wave strain amplitude is completely independent of both the r-mode saturation amplitude and the microphysics and depends on the saturation mechanism only within some tens of percent. However, the gravitational wave frequency depends on the amplitude, and we provide the required expected timing parameter ranges to look for promising sources in future searches.

  15. A photometric investigation of the young open cluster Trumpler 15

    E-Print Network [OSTI]

    Carraro, G

    2002-01-01T23:59:59.000Z

    In this paper we present and analyze new CCD $UBVRI$ photometry down to $V\\approx$21 in the region of the young open cluster Trumpler~15, located in the Carina spiral feature. The cluster is rather compact and has a core radius of about 2$^{\\prime}$, which translates in about 1 pc at the distance of the cluster. We provide the first CCD investigation and update its fundamental parameters. We identify 90 candidate photometric members on the base of the position in the color-color and color-magnitude diagrams. This sample allows us to obtain a distance of 2.4$\\pm$0.3 kpc from the Sun and a reddening E$(B-V)$=0.52$\\pm0.07$. We confirm that the cluster is young, and fix a upper limit of 6 million yrs to its age . In addition, we draw the attention on the lower part of the Main Sequence (MS) suggesting that some stars can be in contracting phase and on a gap in the MS, that we show to be a real feature, the $B1-B5$ gap found in other young open clusters. We finally study in details the extinction toward Trumpler~1...

  16. Discovery of a Young Substellar Companion in Chamaeleon

    E-Print Network [OSTI]

    Luhman, K L; Brandner, W; Skrutskie, M F; Nelson, M J; Smith, J D; Peterson, D E; Cushing, M C; Young, E

    2006-01-01T23:59:59.000Z

    During an imaging survey of the Chamaeleon I star-forming region with the ACS aboard HST, we have discovered a candidate substellar companion to the young low-mass star CHXR 73 (~2 Myr, M=0.35 Msun). We measure a projected separation of 1.3+/-0.03" for the companion, CHXR 73 B, which corresponds to 210 AU at the distance of the cluster. A near-infrared spectrum of this source obtained with CorMASS at the Magellan II telescope exhibits strong steam absorption that confirms its late-type nature (>=M9.5). In addition, the gravity-sensitive shapes of the H- and K-band continua demonstrate that CHXR 73 B is a young, pre-main-sequence object rather than a field star. The probability that CHXR 73A and B are unrelated members of Chamaeleon I is ~0.001. We estimate the masses of CHXR 73 B and other known substellar companions in young clusters with a method that is consistent with the dynamical measurements of the eclipsing binary brown dwarf 2M 0535-0546, which consists of a comparison of the bolometric luminosities ...

  17. Evaluation of global wind power Cristina L. Archer and Mark Z. Jacobson

    E-Print Network [OSTI]

    here are representative of the global distribution of winds, global wind power generated at locations or greater) and can therefore be considered suitable for low-cost wind power generation. This estimate in northern Europe along the North Sea, the southern tip of the South American continent, the island

  18. The Composition of the Soils of Archer, Franklin and Harrision Counties.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1919-01-01T23:59:59.000Z

    .................................... Soils of Harrison County 13 ....................................... Soil series in the areas 16 Bastrop loam .......................................... 17 ............................. . Bastrop very fine sandy loam 18 Caddo fine sandy loam... .................................. 18 Greenburg clay .......................................... 20 ...................................... Greenburg clay loa111 21 Greenburg loam ........................................ 22 Houston clay ...-...................................... 23...

  19. California offshore wind energy potential Michael J. Dvorak a,*, Cristina L. Archer b

    E-Print Network [OSTI]

    California (CA). The siting of an offshore wind farm is limited by water depth, with shallow water being generally preferable economically. Acceptable depths for offshore wind farms are divided into three based wind farms which peak at night, the offshore winds near Cape Mendocino are consistently fast

  20. Daniel E. Archer Ph.D., Experimental Nuclear Structure Physics, Florida State University, 1996

    E-Print Network [OSTI]

    in radiation detectors for Homeland Security, the NMIS ­ Nuclear materials Identification System, and CMTB credits grew to include the position of Detector Lead at PANY/NJ CMTB ­ Port Authority of New York and New system that can detect radioactive materials traveling up to 60 mph. ARAM was also developed

  1. V-234: EMC RSA Archer GRC Open Redirection Weakness and Security Bypass

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you sureReportsofDepartmentSeries |Attacks | Department of Energy3: Red

  2. V-084: RSA Archer eGRC Permits Cross-Site Scripting, Cross-Domain Access,

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO Overview OCHCOSystems Analysis Success|SustainableDepartmentregulations.gov to1:Users

  3. V-151: RSA Archer eGRC Bugs Let Remote Authenticated Users Upload Files and

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual Siteof Energy 2, 2015 -Helicopter-Japan Joint NuclearDepartment ofEnergy

  4. Mukul Tikekar > Graduate Student - Archer Group > Researchers, Postdocs &

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHighandSWPA / SPRA /Ml'.SolarUS Dept ofActing Chief HazaelectronicGraduates

  5. Lynden Archer receives chemical engineering award > EMC2 News > The 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: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9November 6, 2014InnovationPatents -

  6. Yu Ho (Ric) Wen > Postdoc - Archer Group > Researchers, Postdocs &

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsingWhatY-12 recognizedThesis Prize |getsSurfaces

  7. Particle acceleration at supernova shocks in young stellar clusters

    E-Print Network [OSTI]

    Bykov, A M; Osipov, S M

    2011-01-01T23:59:59.000Z

    We briefly discuss models of energetic particle acceleration by supernova shock in active starforming regions at different stages of their evolution. Strong shocks may strongly amplify magnetic fields due to cosmic ray driven instabilities. We discuss the magnetic field amplification emphasizing the role of the long-wavelength instabilities. Supernova shock propagating in the vicinity of a powerful stellar wind in a young stellar cluster is argued to increase the maximal CR energies at a given evolution stage of supernova remnant (SNR) and can convert a sizeable fraction of the kinetic energy release into energetic particles.

  8. Nonlinear elastic free energies and gradient Young-Gibbs measures

    E-Print Network [OSTI]

    Roman Kotecký; Stephan Luckhaus

    2012-06-26T23:59:59.000Z

    We investigate, in a fairly general setting, the limit of large volume equilibrium Gibbs measures for elasticity type Hamiltonians with clamped boundary conditions. The existence of a quasiconvex free energy, forming the large deviations rate functional, is shown using a new interpolation lemma for partition functions. The local behaviour of the Gibbs measures can be parametrized by Young measures on the space of gradient Gibbs measures. In view of unboundedness of the state space, the crucial tool here is an exponential tightness estimate that holds for a vast class of potentials and the construction of suitable compact sets of gradient Gibbs measures.

  9. Young Women's Conference in Science, Technology, Engineering & Mathematics

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office of ScienceandMesa del SolStrengtheningWildfires may contributeSecuritysupportsEnergy You Asked,Young|

  10. Women @ Energy: Young-Kee Kim | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartment of EnergyThePatricia Hoffman is theDr.Ulrike MeierWeiYoung-Kee

  11. Young County, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro IndustriesTownDells, Wisconsin: EnergyWyandanch, NewYanceyYokayoYorktown Heights, NewYoung

  12. iScreening Young Children for Lead Poisoning Foreword..........................................................................................v

    E-Print Network [OSTI]

    iScreening Young Children for Lead Poisoning Contents Foreword Advisory Committee on Childhood Lead Poisoning Prevention 1. Childhood Lead Poisoning in the United States

  13. Review of Research on Vulnerable Young people and Their Transitions to Independent Living 

    E-Print Network [OSTI]

    Elsley, Susan; Backett-Milburn, Kathryn; Jamieson, Lynn

    A research review focusing on young people who have been looked after at home and those who have been looked after and accommodated by Local Authorities.

  14. Review of Research on Vulnerable Young People and Their Transitions to Independent Living 

    E-Print Network [OSTI]

    Elsley, Susan; Backett-Milburn, Kathryn; Jamieson, Lynn

    A research review focusing on young people who have been looked after at home and those who have been looked after and accommodated by Local Authorities.

  15. Consequences of melt transport for uranium series disequilibrium in young lavas

    E-Print Network [OSTI]

    Spiegelman, Marc W.

    Consequences of melt transport for uranium series disequilibrium in young lavas Marc Spiegelman do not actu- ally include melt transport. Here we explore the be- haviour of short

  16. Generic relation between the electron work function and Young's modulus of metals

    SciTech Connect (OSTI)

    Hua Guomin; Li Dongyang [Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 2V4 (Canada)

    2011-07-25T23:59:59.000Z

    In this study, efforts were made to establish a generic relation between the Young's modulus and the electron work function of polycrystalline metals, in which Young's Modulus was defined as the second order derivative of interaction potential with respect to the equilibrium distance. The obtained Young's modulus shows a sextic relation with the work function. Data of Young's modulus and work function of polycrystalline metals, including Alkali earth metals, transition metals, and rare earth metals, can be fitted reasonably well by this derived generic relationship.

  17. at-risk young adults: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  18. at-risk young men: Topics by E-print Network

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

    Consumer Vulnerability in the Web Physics Websites Summary: Vulnerability in the Web 2.0 Society Abstract The young consumers constitute one of the fastest growing Internet:...

  19. The young active star SAO 51891 (V383 Lac)

    E-Print Network [OSTI]

    Biazzo, Katia; Marilli, Ettore; Covino, Elvira; Alcala', Juan M; Cakirli, Omur; Klutsch, Alexis; Meyer, Michael R

    2009-01-01T23:59:59.000Z

    Our aim is investigating surface inhomogeneities of the young late-type star SAO51891, from photosphere to upper chromosphere, analyzing contemporaneous high-resolution spectra and broad-band photometry. The FOCES@CAHA spectral range is used to determine spectral classification and derive vsini and Vrad. The Li abundance is measured to estimate the age. The BVRIJHKs bands are used to construct the SED. The variations of our BV fluxes and Teff are used to infer the presence of photospheric spots and observe their behavior over time. The chromospheric activity is studied applying the spectral subtraction technique to Halpha, CaII H&K, Heps, and CaII IRT lines. We find SAO51891 to be a young K0-1V star with Li abundance close to the Pleiades upper envelope, confirming its youth (~100 Myr), also inferred from its kinematical membership to the Local Association. We detect no IR excess from SED analysis, and rotational modulation of luminosity, Teff, CaII, and Heps total fluxes. A spot model with two active reg...

  20. Circumbinary Molecular Rings Around Young Stars in Orion

    E-Print Network [OSTI]

    Luis A. Zapata; Paul T. P. Ho; Luis F. Rodriguez; Peter Schilke; Stan Kurtz

    2007-07-09T23:59:59.000Z

    We present high angular resolution 1.3 mm continuum, methyl cyanide molecular line, and 7 mm continuum observations made with the Submillimeter Array and the Very Large Array, toward the most highly obscured and southern part of the massive star forming region OMC1S located behind the Orion Nebula. We find two flattened and rotating molecular structures with sizes of a few hundred astronomical units suggestive of circumbinary molecular rings produced by the presence of two stars with very compact circumstellar disks with sizes and separations of about 50 AU, associated with the young stellar objects 139-409 and 134-411. Furthermore, these two circumbinary rotating rings are related to two compact and bright {\\it hot molecular cores}. The dynamic mass of the binary systems obtained from our data are $\\geq$ 4 M$_\\odot$ for 139-409 and $\\geq$ 0.5 M$_\\odot$ for 134-411. This result supports the idea that intermediate-mass stars will form through {\\it circumstellar disks} and jets/outflows, as the low mass stars do. Furthermore, when intermediate-mass stars are in multiple systems they seem to form a circumbinary ring similar to those seen in young, multiple low-mass systems (e.g., GG Tau and UY Aur).

  1. August 2014 Subject: Research in Germany-Information Seminar for Young Researchers

    E-Print Network [OSTI]

    Krishnapura, Nagendra

    26th August 2014 Subject: Research in Germany- Information Seminar for Young Researchers Warm-doctoral candidates as well as young academics interested in a research stay in Germany, towards initiating & strengthening research co operations with Germany. Date: 20th September 2014 Venue: IC & SR Auditorium, IIT

  2. PII S0016-7037(98)00211-7 The young age of Earth

    E-Print Network [OSTI]

    Zhang, Youxue

    PII S0016-7037(98)00211-7 The young age of Earth YOUXUE ZHANG* Department of Geological Sciences form June 8, 1998) Abstract--Patterson (1956) established that the age of Earth is close, disagreement is abundant, and the young age of Earth has not been widely accepted. In this work, I examine all

  3. Imaging Young Giant Planets From Ground and Space CHARLES A. BEICHMAN

    E-Print Network [OSTI]

    of the James Webb Space Telescope (JWST). Monte Carlo modeling reveals that JWST can detect planets with masses of a dust disk. What is needed to anchor the models of young planets are objects of known ageImaging Young Giant Planets From Ground and Space CHARLES A. BEICHMAN NASA Exoplanet Science

  4. Thermo-mechanical structure beneath the young orogenic belt of Taiwan

    E-Print Network [OSTI]

    Ma, Kuo-Fong

    Thermo-mechanical structure beneath the young orogenic belt of Taiwan Kuo-Fong Ma*, Teh-Ru Alex Abstract We investigate the thermo-mechanical properties beneath the young orogenic belt of Taiwan.V. All rights reserved. Keywords: Thermo-mechanical; Rheology; Seismicity; Strength profile; Composition

  5. YOUNG ENTREPRENEUR PROGRAM The Indiana Economic Development Corporation (IEDC) is promoting

    E-Print Network [OSTI]

    YOUNG ENTREPRENEUR PROGRAM The Indiana Economic Development Corporation (IEDC) is promoting a reality in Indiana. The IEDC will work with local and regional communities to offer incentives to the Young Entrepreneurs with the best business plans. These incentives can include and are not limited to

  6. School of Engineering and Applied Science Outstanding Young Engineering Graduate Award

    E-Print Network [OSTI]

    Acton, Scott

    and the School of Engineering and Applied Science in Chemical Engineering where he did research in Catalysis2011 School of Engineering and Applied Science Outstanding Young Engineering Graduate Award of Engineering and Applied Science and are 40 years of age or younger. ********** While he is still young, Dr

  7. Brigham Young University Geology Studies Volume 23, Part 3-October 1976

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;Brigham Young University Geology Studies Volume 23, Part 3-October 1976 Contents A Well ........................................................ E. Blair Maxfield 67 Publications and Maps of the Geology Department ............................ 163 #12;A publication of the Department of Geology Brigham Young University Provo, Utah 84602 Edltor W

  8. Skin Cancer: A Young Person's Disease By Lauren Duffy (B.S. Communication, Journalism '14)

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    Skin Cancer: A Young Person's Disease By Lauren Duffy (B.S. Communication, Journalism '14 is that this behavior is extremely unhealthy and risky for their bodies, specifically their skin. Skin cancer is the most common form of cancer found in young adults and second most common cancer found in adolescents

  9. Tobacco, alcohol, cannabis and other illegal drug use among young adults: the socioeconomic context.

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Tobacco, alcohol, cannabis and other illegal drug use among young adults: the socioeconomic.drugalcdep.2011.09.002 #12;2 Tobacco, alcohol, cannabis and other illegal drug use among young adults (CAST), other illegal drug use. Socioeconomic position was defined by educational attainment

  10. Statistical fractal analysis of 25 young star clusters

    E-Print Network [OSTI]

    Gregorio-Hetem, J; Santos-Silva, T; Fernandes, B

    2015-01-01T23:59:59.000Z

    A large sample of young stellar groups is analysed aiming to investigate their clustering properties and dynamical evolution. A comparison of the Q statistical parameter, measured for the clusters, with the fractal dimension estimated for the projected clouds shows that 52% of the sample has substructures and tends to follow the theoretically expected relation between clusters and clouds, according to calculations for artificial distribution of points. The fractal statistics was also compared to structural parameters revealing that clusters having radial density profile show a trend of parameter s increasing with mean surface stellar density. The core radius of the sample, as a function of age, follows a distribution similar to that observed in stellar groups of Milky Way and other galaxies. They also have dynamical age, indicated by their crossing time that is similar to unbound associations. The statistical analysis allowed us to separate the sample into two groups showing different clustering characteristi...

  11. Young's Double Slit Experiment in Quantum Field Theory

    E-Print Network [OSTI]

    Masakatsu Kenmoku; Kenji Kume

    2011-03-01T23:59:59.000Z

    Young's double slit experiment is formulated in the framework of canonical quantum field theory in view of the modern quantum optics. We adopt quantum scalar fields instead of quantum electromagnetic fields ignoring the vector freedom in gauge theory. The double slit state is introduced in Fock space corresponding to experimental setup. As observables, expectation values of energy density and positive frequency part of current with respect to the double slit state are calculated which give the interference term. Classical wave states are realized by coherent double slit states in Fock space which connect quantum particle states with classical wave states systematically. In case of incoherent sources, the interference term vanishes by averaging random phase angles as expected.

  12. MID-INFRARED SPECTRAL VARIABILITY ATLAS OF YOUNG STELLAR OBJECTS

    SciTech Connect (OSTI)

    Kospal, A. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA, Leiden (Netherlands); Abraham, P.; Kun, M.; Moor, A. [Konkoly Observatory, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, P.O. Box 67, 1525 Budapest (Hungary); Acosta-Pulido, J. A. [Instituto de Astrofisica de Canarias, Via Lactea s/n, 38200 La Laguna, Tenerife (Spain); Dullemond, C. P. [Institut fuer Theoretische Astrophysik, Zentrum fuer Astronomie der Universitaet Heidelberg, Albert-Ueberle-Str. 2, 69120 Heidelberg (Germany); Henning, Th.; Leinert, Ch. [Max-Planck-Institut fuer Astronomie, Koenigstuhl 17, 69117 Heidelberg (Germany); Turner, N. J., E-mail: akospal@rssd.esa.int [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States)

    2012-08-01T23:59:59.000Z

    Optical and near-infrared variability is a well-known property of young stellar objects. However, a growing number of recent studies claim that a considerable fraction of them also exhibit mid-infrared flux changes. With the aim of studying and interpreting variability on a decadal timescale, here we present a mid-infrared spectral atlas containing observations of 68 low- and intermediate-mass young stellar objects. The atlas consists of 2.5-11.6 {mu}m low-resolution spectra obtained with the ISOPHOT-S instrument on board the Infrared Space Observatory (ISO) between 1996 and 1998, as well as 5.2-14.5 {mu}m low-resolution spectra obtained with the Infrared Spectrograph instrument on board the Spitzer Space Telescope between 2004 and 2007. The observations were retrieved from the ISO and Spitzer archives and were post-processed interactively by our own routines. For those 47 objects where multi-epoch spectra were available, we analyze mid-infrared spectral variability on annual and/or decadal timescales. We identify 37 variable candidate sources. Many stars show wavelength-independent flux changes, possibly due to variable accretion rates. In several systems, all exhibiting 10 {mu}m silicate emission, the variability of the 6-8 {mu}m continuum, and the silicate feature exhibit different amplitudes. A possible explanation is variable shadowing of the silicate-emitting region by an inner disk structure of changing height or extra silicate emission from dust clouds in the disk atmosphere. Our results suggest that mid-infrared variability, in particular, the wavelength-dependent changes, is more ubiquitous than was known before. Interpreting this variability is a new possibility for exploring the structure of the disk and its dynamical processes.

  13. Young Texas Saves Program Leader Instructions Thank you for committing to be a Young Texas Saves Leader. You will make a difference in your 4-H club. Below, we

    E-Print Network [OSTI]

    Young Texas Saves Program Leader Instructions Thank you for committing to be a Young Texas Saves your session. Program Checklist Introduce yourself as a Saves Leader for your club. Introduce the Saves program. Young Texas Saves is a youth-led movement in the Texas 4-H Program. 4-H members across

  14. International Workshop of Young Doctors in Geomechanics -W(H)YDOC 08 Pereira, De Gennaro & Delage (eds) 2008, Ecole des Ponts ParisTech, Champs-sur-Marne

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 Pereira, De Gennaro of young doctors in geomechanics

  15. International Workshop of Young Doctors in Geomechanics -W(H)YDOC 08 Pereira, De Gennaro & Delage (eds) 2008, Ecole des Ponts ParisTech, Champs-sur-Marne

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 Pereira, De Gennaro of young doctors in geomechanics,

  16. THE ANATOMY OF THE YOUNG PROTOSTELLAR OUTFLOW HH 211

    SciTech Connect (OSTI)

    Tappe, A.; Forbrich, J.; Lada, C. J. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, MS-72, Cambridge, MA 02138 (United States); Martin, S. [European Southern Observatory, Alonso de Cordova 3107, Vitacura, Casilla 19001, Santiago 19 (Chile); Yuan, Y., E-mail: atappe@cfa.harvard.edu [Department of Physics and Astronomy, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 (United States)

    2012-05-20T23:59:59.000Z

    We present Spitzer Space Telescope 5-36 {mu}m mapping observations toward the southeastern lobe of the young protostellar outflow HH 211. The southeastern terminal shock of the outflow shows a rich mid-infrared spectrum including molecular emission lines from OH, H{sub 2}O, HCO{sup +}, CO{sub 2}, H{sub 2}, and HD. The spectrum also shows a rising infrared continuum toward 5 {mu}m, which we interpret as unresolved emission lines from highly excited rotational levels of the CO v = 1-0 fundamental band. This interpretation is supported by a strong excess flux observed in the Spitzer/IRAC 4-5 {mu}m channel 2 image compared to the other IRAC channels. The extremely high critical densities of the CO v = 1-0 ro-vibrational lines and a comparison to H{sub 2} and CO excitation models suggest jet densities larger than 10{sup 6} cm{sup -3} in the terminal shock. We also observed the southeastern terminal outflow shock with the Submillimeter Array and detected pure rotational emission from CO 2-1, HCO{sup +} 3-2, and HCN 3-2. The rotationally excited CO traces the collimated outflow backbone as well as the terminal shock. HCN traces individual dense knots along the outflow and in the terminal shock, whereas HCO{sup +} solely appears in the terminal shock. The unique combination of our mid-infrared and submillimeter observations with previously published near-infrared observations allow us to study the interaction of one of the youngest known protostellar outflows with its surrounding molecular cloud. Our results help us to understand the nature of some of the so-called green fuzzies (Extended Green Objects), and elucidate the physical conditions that cause high OH excitation and affect the chemical OH/H{sub 2}O balance in protostellar outflows and young stellar objects. In an appendix to this paper, we summarize our Spitzer follow-up survey of protostellar outflow shocks to find further examples of highly excited OH occurring together with H{sub 2}O and H{sub 2}.

  17. The Photoevaporation of Discs Around Young Stars in Massive Clusters

    E-Print Network [OSTI]

    C. J. Clarke

    2007-02-05T23:59:59.000Z

    We present models in which the photoevaporation of discs around young stars by an external ultraviolet source (as computed by Adams et al 2004) is coupled with the internal viscous evolution of the discs. These models are applied to the case of the Orion Nebula Cluster, where the presence of a strong ultraviolet field from the central OB stars, together with a detailed census of circumstellar discs and photoevaporative flows, is well established. In particular we investigate the constraints that are placed on the initial disc properties in the ONC by the twin requirement that most stars possess a disc on a scale of a few A.U., but that only a minority ($ 0.1 M_\\odot$). The ubiquity of discs on a small scale, on the other hand, mainly constrains the timespan over which the discs have been exposed to the ultraviolet field ($< 2 $Myr). We argue that the discs that are resolved by HST represent a population of discs in which self-gravity was important at the time that the dominant central OB star switched on, but that, according to our models, self-gravity is unlikely to be important in these discs at the present time. We discuss the implications of our results for the so-called proplyd lifetime problem.

  18. Lyman-break galaxies are they young spheroids?

    E-Print Network [OSTI]

    Matteucci, F

    2002-01-01T23:59:59.000Z

    We have compared the results from a model for the chemical evolution of an elliptical galaxy with initial luminous mass of 2x10^10 M_sun and effective radius of 2 kpc with the recent abundance determinations for the Lyman-break galaxy MS 1512-cB58 at a redshift z=2.7276. After correcting the iron abundance determination for the presence of dust we concluded that the observed [Si/Fe], [Mg/Fe], [N/Fe] are consistent with our model when a galactic age between 20 and 35 Myr is assumed. Moreover, the [N/O] ratio also suggests the same age. This age is in very good agreement with other independent studies based on the analysis of the spectral energy distribution suggesting that this object is younger than 35 Myr. Therefore, we suggest that MS 1512-cB58 is a truly young normal elliptical galaxy experiencing its main episode of star formation and galactic wind.

  19. Non-Cosmological FRB's from Young Supernova Remnant Pulsars

    E-Print Network [OSTI]

    Connor, Liam; Pen, Ue-Li

    2015-01-01T23:59:59.000Z

    We propose a new extragalactic but non-cosmological explanation for FRB's based on very young pulsars in supernova remnants. Within a few hundred years of a core-collapse supernova the ejecta is confined within $\\sim$1 pc, providing a high enough column density of free electrons for the observed 500-1500 pc/cm$^3$. By extrapolating a Crab-like pulsar to its infancy in an environment like that of SN 1987A, we hypothesize such an object could emit supergiant pulses sporadically which would be bright enough to be seen at a few hundred megaparsecs. In this scenario Faraday rotation at the source gives RM's much larger than the expected cosmological contribution. If the emission were pulsar-like, then the polarization vector could swing over the duration of the burst, which is not expected from non-rotating objects. In this model, the scattering, large DM, and commensurate RM all come from one place which is not the case for the cosmological interpretation. The model also provides testable predictions of the flux ...

  20. Herschel Hi-GAL imaging of massive young stellar objects

    E-Print Network [OSTI]

    Olguin, F A; Wheelwright, H E; Clay, S J; de Wit, W -J; Rafiq, I; Pezzuto, S; Molinari, S

    2015-01-01T23:59:59.000Z

    We used Herschel Hi-GAL survey data to determine whether massive young stellar objects (MYSOs) are resolved at 70$\\mu$m and to study their envelope density distribution. Our analysis of three relatively isolated sources in the l=30{\\deg} and l=59{\\deg} Galactic fields show that the objects are partially resolved at 70$\\mu$m. The Herschel Hi-GAL survey data have a high scan velocity which makes unresolved and partially resolved sources appear elongated in the 70$\\mu$m images. We analysed the two scan directions separately and examine the intensity profile perpendicular to the scan direction. Spherically symmetric radiative transfer models with a power law density distribution were used to study the circumstellar matter distribution. Single dish sub-mm data were also included to study how different spatial information affects the fitted density distribution. The density distribution which best fits both the 70$\\mu$m intensity profile and SED has an average index of ~0.5. This index is shallower than expected an...

  1. THE TOP 10 SPITZER YOUNG STELLAR OBJECTS IN 30 DORADUS

    SciTech Connect (OSTI)

    Walborn, Nolan R. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Barba, Rodolfo H. [Departamento de Fisica, Universidad de La Serena, Cisternas 1200 Norte, La Serena (Chile); Sewilo, Marta M., E-mail: walborn@stsci.edu, E-mail: rbarba@dfuls.cl, E-mail: mmsewilo@pha.jhu.edu [Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218 (United States)

    2013-04-15T23:59:59.000Z

    The most luminous Spitzer point sources in the 30 Doradus triggered second generation are investigated coherently in the 3-8 {mu}m region. Remarkable diversity and complexity in their natures are revealed. Some are also among the brightest JHK sources, while others are not. Several of them are multiple when examined at higher angular resolutions with Hubble Space Telescope NICMOS and WFPC2/WFC3 as available, or with VISTA/VMC otherwise. One is a dusty compact H II region near the far northwestern edge of the complex, containing a half-dozen bright I-band sources. Three others appear closely associated with luminous WN stars and causal connections are suggested. Some are in the heads of dust pillars oriented toward R136, as previously discussed from the NICMOS data. One resides in a compact cluster of much fainter sources, while another appears monolithic at the highest resolutions. Surprisingly, one is the brighter of the two extended ''mystery spots'' associated with Knot 2 of Walborn et al. Masses are derived from young stellar object models for unresolved sources and lie in the 10-30 M{sub Sun} range. Further analysis of the IR sources in this unique region will advance understanding of triggered massive star formation, perhaps in some unexpected and unprecedented ways.

  2. The Properties of Young Clusters in M82

    E-Print Network [OSTI]

    L. J. Smith; J. S. Gallagher

    2000-01-31T23:59:59.000Z

    We present a detailed study of two luminous super star clusters in the starburst galaxy M82. Spectra, covering 3250-8790 A at a resolution of 1.6 A, were obtained at the 4.2 m William Herschel Telescope (WHT) for cluster F and the highly reddened cluster L. We compare the strengths of the observed Balmer absorption lines and the Balmer jump in the blue spectrum of F with theoretical model cluster spectra using the PEGASE spectral synthesis code to derive an age of 60+/-20 Myr. For cluster L, we find that the similarities in the strength of the Ca II triplet and overall spectral appearance with cluster F suggest a similar age. The brightness and compactness of cluster F make it an ideal candidate for determining its dynamical mass by measuring the velocity dispersion. We present the results of such an investigation based on echelle spectra at a resolution of 8 km/s obtained at the WHT from 5760-9140 A. By cross-correlating various wavelength regions in the spectrum of cluster F with cool giant and supergiant template stars, we derive a velocity dispersion and, by application of the virial theorem, determine a dynamical mass of 2 million solar masses. We compare our derived mass with those determined for other young super star clusters and discuss whether our derived parameters are consistent with cluster F being able to survive to become a globular cluster.

  3. Mass Segregation in Young LMC Clusters I. NGC 2157

    E-Print Network [OSTI]

    Philippe Fischer; Carlton Pryor; Stephen Murray; Mario Mateo; Tom Richtler

    1997-10-31T23:59:59.000Z

    We have carried out WFPC2 V- and I-band imaging of the young LMC cluster NGC 2157. Construction of a color-magnitude diagram and isochrone fitting yields an age of tau = 100 000 000 yrs, a reddening E(B-V) = 0.1 and a distance modulus of 18.4 mag. Our data covers the mass range 0.75 < m < 5.1 solar masses. We find that the cluster mass function changes significantly from the inner regions to the outer regions, becoming steeper (larger number of low mass stars relative to high mass stars) at larger radii. The age of NGC 2157 is comparable to its two-body relaxation timescale only in the cluster core. The observed steepening of the mass function at larger radii is therefore most likely an initial condition of the cluster stars. Such initial conditions are predicted in models of cluster star formation in which dissipative processes act more strongly upon more massive stars.

  4. Supersonic Line Broadening within Young and Massive Super Star Clusters

    E-Print Network [OSTI]

    Tenorio-Tagle, G; Silich, S; Munoz-Tunon, C; Palous, J

    2009-01-01T23:59:59.000Z

    The origin of supersonic infrared and radio recombination nebular lines often detected in young and massive superstar clusters are discussed. We suggest that these arise from a collection of repressurizing shocks (RSs), acting effectively to re-establish pressure balance within the cluster volume and from the cluster wind which leads to an even broader although much weaker component. The supersonic lines are here shown to occur in clusters that undergo a bimodal hydrodynamic solution (Tenorio-Tagle et al. 2007), that is within clusters that are above the threshold line in the mechanical luminosity or cluster mass vs the size of the cluster (Silich et al. 2004). The plethora of repressurizing shocks is due to frequent and recurrent thermal instabilities that take place within the matter reinserted by stellar winds and supernovae. We show that the maximum speed of the RSs and of the cluster wind, are both functions of the temperature reached at the stagnation radius. This temperature depends only on the cluster...

  5. HUNTING FOR YOUNG DISPERSING STAR CLUSTERS IN IC 2574

    SciTech Connect (OSTI)

    Pellerin, Anne [Department of Physics and Astronomy, Texas A and M University, College Station, TX 77843-4242 (United States); Meyer, Martin M. [International Centre for Radio Astronomy Research, University of Western Australia, 35 Stirling Highway, CRAWLEY WA 6009 (Australia); Calzetti, Daniella [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Harris, Jason, E-mail: apellerin@mta.ca, E-mail: martin.meyer@uwa.edu.au, E-mail: calzetti@astro.umass.edu, E-mail: jharris@30doradus.org [Illumina, Inc., 25861 Industrial Blvd, Hayward, CA 94545 (United States)

    2012-12-01T23:59:59.000Z

    Dissolving stellar groups are very difficult to detect using traditional surface photometry techniques. We have developed a method to find and characterize non-compact stellar systems in galaxies where the young stellar population can be spatially resolved. By carrying out photometry on individual stars, we are able to separate the luminous blue stellar population from the star field background. The locations of these stars are used to identify groups by applying the HOP algorithm, which are then characterized using color-magnitude and stellar density radial profiles to estimate age, size, density, and shape. We test the method on Hubble Space Telescope Advanced Camera for Surveys archival images of IC 2574 and find 75 dispersed stellar groups. Of these, 20 highly dispersed groups are good candidates for dissolving systems. We find few compact systems with evidence of dissolution, potentially indicating that star formation in this galaxy occurs mostly in unbound clusters or groups. These systems indicate that the dispersion rate of groups and clusters in IC 2574 is at most 0.45 pc Myr{sup -1}. The location of the groups found with HOP correlate well with H I contour map features. However, they do not coincide with H I holes, suggesting that those holes were not created by star-forming regions.

  6. Triggered Star Formation in the Environment of Young Massive Stars

    E-Print Network [OSTI]

    M. Gritschneder; T. Naab; F. Heitsch; A. Burkert

    2006-09-26T23:59:59.000Z

    Recent observations with the Spitzer Space Telescope show clear evidence that star formation takes place in the surrounding of young massive O-type stars, which are shaping their environment due to their powerful radiation and stellar winds. In this work we investigate the effect of ionising radiation of massive stars on the ambient interstellar medium (ISM): In particular we want to examine whether the UV-radiation of O-type stars can lead to the observed pillar-like structures and can trigger star formation. We developed a new implementation, based on a parallel Smooth Particle Hydrodynamics code (called IVINE), that allows an efficient treatment of the effect of ionising radiation from massive stars on their turbulent gaseous environment. Here we present first results at very high resolution. We show that ionising radiation can trigger the collapse of an otherwise stable molecular cloud. The arising structures resemble observed structures (e.g. the pillars of creation in the Eagle Nebula (M16) or the Horsehead Nebula B33). Including the effect of gravitation we find small regions that can be identified as formation places of individual stars. We conclude that ionising radiation from massive stars alone can trigger substantial star formation in molecular clouds.

  7. Stay on marked paths to avoid poison ivy. Watch young children carefully around river and creeks.

    E-Print Network [OSTI]

    Shyy, Wei

    Caution · Stay on marked paths to avoid poison ivy. · Watch young children carefully around river or outdoor cooking are not permitted. Poison Ivy Hours · Trails and gardens open 8 am to dusk. · Conservatory

  8. The voice-bar after closure of coda consonants in the speech of young children

    E-Print Network [OSTI]

    Cho, Won Ron

    2008-01-01T23:59:59.000Z

    The purpose of this study is to gain some insight into the speech acquisition process and articulator development of young children whose mother-tongue is American English. The presence of voice-bars after the closure of ...

  9. RADIO DETECTION OF GREEN PEAS: IMPLICATIONS FOR MAGNETIC FIELDS IN YOUNG GALAXIES

    E-Print Network [OSTI]

    Chakraborti, Sayan

    Green Peas are a new class of young, emission line galaxies that were discovered by citizen volunteers in the Galaxy Zoo project. Their low stellar mass, low metallicity, and very high star formation rates make Green Peas ...

  10. Growing Up in Scotland: Use of Informal Support by Families with Young Children 

    E-Print Network [OSTI]

    Bradshaw, Paul; Jamieson, Lynn; Wasoff, Fran

    2008-03-12T23:59:59.000Z

    This report, which draws on data from the first sweep of the Growing Up in Scotland study, starts from the position that in order to understand the types of formal support services that parents of young children require....

  11. A Model for Conducting Research with Learning Disabled Adolescents and Young Adults

    E-Print Network [OSTI]

    Meyen, Edward L.; Schiefelbusch, Richard L.; Deshler, Donald D.; Alley, Gordon R.; Schumaker, Jean B.; Clark, Frances L.

    1980-01-01T23:59:59.000Z

    Issues from the field of learning disabilities and the field of education in general which impact the learning disabled individual are discussed as they relate to research with learning disabled adolescents and young adults ...

  12. A Research Strategy for Studying Learning Disabled Adolescents and Young Adults

    E-Print Network [OSTI]

    Schumaker, Jean B.; Alley, Gordon R.; Warner, Michael M.; Deshler, Donald D.

    1980-01-01T23:59:59.000Z

    Unique problems related to adolescents and young adults which researchers must consider in designing interventions are discussed. These unique factors associate with the condition of learning disabilities in adolescents ...

  13. Eating Attitudes and Behaviours in Young People With or Without a Diabetic Sibling 

    E-Print Network [OSTI]

    Smith, Rachel K

    2007-01-01T23:59:59.000Z

    Objectives: Body image concerns and problematic eating attitudes and behaviours are recognised as an important concern for young people and clinicians. Identification of groups that might be at risk of developing such ...

  14. Professional environment of post-school transitions of young people with additional support needs 

    E-Print Network [OSTI]

    Brown, Joan

    2012-11-29T23:59:59.000Z

    The focus of this qualitative study is the professional environment where post-school transitions take place. It seeks to identify some possible means for improving outcomes for young people with low educational achievement, ...

  15. Quality of Life Concerns in Young Adult Survivors of Childhood Cancer: A Qualitative Research Investigation 

    E-Print Network [OSTI]

    Puckett, Stevie

    2013-06-13T23:59:59.000Z

    , while balancing the dual roles of young adult and survivor. Survivors revealed difficulties in essentially every area of their lives (school, work, friendships, family, romance, self-esteem, outlook and attitudes, etc.), and though many could identify...

  16. Priming the interpretation of ambiguous noun-noun compounds in young children 

    E-Print Network [OSTI]

    Fialka, Justine K B

    2010-06-30T23:59:59.000Z

    Abstract: Investigation into adult language users’ interpretation of ambiguous noun-noun compounds has been considerably explored and documented. However, investigation into the same phenomenon in a population such as young ...

  17. Residential insecticide usage in northern California homes with young XIANGMEI (MAY) WUa

    E-Print Network [OSTI]

    Leistikow, Bruce N.

    Residential insecticide usage in northern California homes with young children XIANGMEI (MAY) WUa of Health and Environment, Seoul National University, Seoul, South Korea Residential insecticide usage and August 2008. Structured telephone interviews were conducted collecting information on residential use

  18. Two examples of education in Acoustics for undergraduate and young postgraduate students

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Two examples of education in Acoustics for undergraduate and young postgraduate students B and arts, since music is very near from many physical problems such as room acous- tics and musical

  19. Tracking Reading: Dual Task Costs of Oral Reading for Young Versus Older Adults

    E-Print Network [OSTI]

    Kemper, Susan; Bontempo, Daniel; Schmalzried, RaLynn Cheri; McKedy, Whitney; Tagliaferri, Bruno; Kieweg, Doug

    2014-02-01T23:59:59.000Z

    A digital pursuit rotor was used to monitor oral reading costs by time-locking tracking performance to the auditory wave form produced as young and older adults were reading out short paragraphs. Multilevel modeling was ...

  20. Tracking Talking: Dual Task Costs of Planning and Producing Speech for Young versus Older Adults

    E-Print Network [OSTI]

    Kemper, Susan; Hoffman, Lesa; Schmalzried, RaLynn Cheri; Herman, Ruth; Kieweg, Doug

    2011-05-01T23:59:59.000Z

    A digital pursuit rotor was used to monitor speech planning and production costs by time-locking tracking performance to the auditory wave form produced as young and older adults were describing someone they admire. The ...

  1. Children's and young people's concerns about their sexual health and wellbeing 

    E-Print Network [OSTI]

    Backett-Milburn, Kathryn; Ogilvie-Whyte, Sharon

    The last decade has seen increasing efforts by central and local government to target sexual health services and initiatives at young people in order to improve their sexual health. In order that the Sexual Health Strategy ...

  2. Assumptions and Strategies for Conducting Research with Learning Disabled Adolescents and Young Adults

    E-Print Network [OSTI]

    Meyen, Edward L.; Schiefelbusch, Richard L.; Deshler, Donald D.; Alley, Gordon R.; Moran, Mary Ross; Clark, Frances L.

    1980-01-01T23:59:59.000Z

    This paper details the assumptions about learning disabled adolescents and young adults as well as assumptions about conducting research with this population held by researchers at the Kansas Institute. Strategies developed ...

  3. A Case Study of a Young Child Doing Turtle Graphics in LOGO

    E-Print Network [OSTI]

    Solomon, Cynthia J.

    1976-07-01T23:59:59.000Z

    This paper explores some important issues with regard to using computers in education. It probes into the question of what programming ideas and projects will engage young children. In particular, a seven year old ...

  4. Shaking things up: young infants' use of sound information for object individuation

    E-Print Network [OSTI]

    Smith, Tracy Rebecca

    2009-05-15T23:59:59.000Z

    SHAKING THINGS UP: YOUNG INFANTS? USE OF SOUND INFORMATION FOR OBJECT INDIVIDUATION A Thesis by TRACY REBECCA SMITH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 2007 Major Subject: Psychology SHAKING THINGS UP: YOUNG INFANTS? USE OF SOUND INFORMATION FOR OBJECT INDIVIDUATION A Thesis by TRACY REBECCA SMITH Submitted to the Office...

  5. The effect of a new anabolic steroid on spermatogenesis in young stallions

    E-Print Network [OSTI]

    Bullard, Tommy Loran

    1971-01-01T23:59:59.000Z

    THE EFFECT OF A NEW ANABOLIC STEROID ON SPERMATOGENESIS IN YOUNG STALLIONS A Thesis by TOMMY LORAN BULLARD Submitted to the Graduate College of Texas AgiM University in partial fulfillment of the requirement for the degree of MASTER...: (Chairman of ' mrnittee) (Head of Department) (Member) (Member) (Member) May 1971 111 ABSTRACT The Effect of a New Anabolic Steroid on Spermatogenesis in Young Stallions (May 1971) Tommy Loran Bullard, B, S. , Texas AK-M University; D. V. M. , Texas...

  6. Water destruction by X-rays in young stellar objects

    E-Print Network [OSTI]

    P. Stauber; J. K. Jorgensen; E. F. van Dishoeck; S. D. Doty; A. O. Benz

    2006-02-06T23:59:59.000Z

    We study the H2O chemistry in star-forming environments under the influence of a central X-ray source and a central far ultraviolet (FUV) radiation field. The gas-phase water chemistry is modeled as a function of time, hydrogen density and X-ray flux. To cover a wide range of physical environments, densities between n_H = 10^4-10^9 cm^-3 and temperatures between T = 10-1000 K are studied. Three different regimes are found: For T water abundance is of order 10^-7-10^-6 and can be somewhat enhanced or reduced due to X-rays, depending on time and density. For 100 K 10^-3 ergs s-1 cm^-2 (t = 10^4 yrs) and for F_X > 10^-4 ergs s^-1 cm^-2 (t = 10^5 yrs). At higher temperatures (T > 250 K) and hydrogen densities, water can persist with x(H2O) ~ 10^-4 even for high X-ray fluxes. The X-ray and FUV models are applied to envelopes around low-mass Class 0 and I young stellar objects (YSOs). Water is destroyed in both Class 0 and I envelopes on relatively short timescales (t ~ 5000 yrs) for realistic X-ray fluxes, although the effect is less prominent in Class 0 envelopes due to the higher X-ray absorbing densities there. FUV photons from the central source are not effective in destroying water. The average water abundance in Class I sources for L_X > 10^27 ergs s^-1 is predicted to be x(H2O) < 10^-6.

  7. DALLAS, TEXAS Localized Patterns in Homogeneous Networks of

    E-Print Network [OSTI]

    Moore, Peter K.

    ;usively Coupled Reactors Peter K. Moore, Werner Horsthemke SMU Math Report 04-002 DEPARTMENT; This research was partially supported by NSF Grant #DMS-0203154 y Department of Chemistry, SMU 1 #12; dynamics

  8. DALLAS, TEXAS Applications of Lobatto Polynomials to an

    E-Print Network [OSTI]

    Moore, Peter K.

    Finite Element Method: Estimating Solution Derivatives and Grid-to-Grid Interpolation Peter K. Moore SMU, pmoore@mail.smu.edu June 28, 2001 Abstract.Hp-adaptive #12;nite element methods require algorithms

  9. MIS @ UT Dallas Creating Value Through IT -Driven Business Intelligence

    E-Print Network [OSTI]

    O'Toole, Alice J.

    . Patient Point WebFilings, LLC Aptiva Corporation ESRI PayPal, Inc. World Wide Technology Argus Fischer & Company PDS Tech. Xenosoft Technologies, Inc. Ariba, Inc. Fiserv PDX Inc Yellowbox Solutions AssociationCoopers Zimmer, Inc. Automation Solutions, Inc. GTL USA, Inc. Propelsys Technologies ZINI'S Pizzeria Axometrics

  10. KaushikRajashekara TheUniversityofTexasatDallas

    E-Print Network [OSTI]

    California at Davis, University of

    of a EV Power-train 13 14 #12;15 Vehicle range per battery charge under various driving conditions Fuel/DOETargets Batteries ElectricMachines PowerElectronics Futurepowertrains Conclusions 2 #12;GeneralMotorsEV1 * Engine: 1.3 liter, 4 cylinder * Battery: 100.8V DC (NiMH battery), 5.75 Ah * Motor/Generator: 13 KW @1500

  11. alcaeorrhynchus grandis dallas: Topics by E-print Network

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

    Summary: ? intelligent landscaping ? efficient MEP systems ? 53 well geothermal heat pump system ? greywater recapture and reuse ? 7.7 kw photovoltaic array key...

  12. Continuous Commissioning® of the Dallas/Fort Worth International Airport

    E-Print Network [OSTI]

    Yazdani, B.; Schroeder, F.; Kramer, L.; Baltazar, J. C.; Turner, W. D.; Wei, G.; Deng, S.; Henson, R.; Dennis, J. R.; T., R.

    and cost savings. The Energy Systems Laboratory was hired to apply the Continuous Commissioning ? (CC ? ) 1 process at the airport. Five projects have been identified to date including: 1. An energy audit and assessment of Terminal B and a lighting... on the completed projects: the Consolidated Rent-A-Car Center, the Airport Administration Building, and the major on-going projects, CC of Terminal D and Energy Plaza. 1 Both Continuous Commissioning and CC...

  13. Radio Frequency Identification (RFID) Stakeholder Meeting Dallas, Texas

    E-Print Network [OSTI]

    in U.S. disposal facilities. · Discussion of limiting pilot to trucks, or whether other modes with wastes brought from Mexico and abandoned in warehouses in Texas. Warehousing of hazardous waste in the U

  14. Sevin Rosen Funds (Texas - Dallas) | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries Pvt Ltd JumpInformationScottsOklahoma:Sevin Rosen Funds (California) Jump

  15. Dallas: Building a Greener City | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T,Office of Policy, OAPMMilestone | DepartmentEA Featured Training

  16. Clean Cities: Dallas-Fort Worth Clean Cities coalition

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z CPlasma0 12

  17. Lake Dallas, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation, searchOf Kilauea Volcano, Hawaii9969995°,ILEDSGP/join <LacArrowhead,IDallas,

  18. Dallas County, Arkansas: 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database Data and Resources11-DNA JumpRenewablesDallam

  19. Dallas County, Iowa: 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database Data and Resources11-DNA JumpRenewablesDallamIowa: Energy

  20. Dallas County, Missouri: 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model,DOE Facility Database Data and Resources11-DNA JumpRenewablesDallamIowa:

  1. Town of Dallas, North Carolina (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 onYou are now leaving Energy.gov You are now leaving Energy.gov YouKizildere IRaghuraji Agro Industries PvtStratosolarTharaldsonInformationTorpedoBoylston, MassachusettsTown ofTown

  2. Alternative Fuels Data Center: Dallas Police Department Reduces Vehicle

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProductsAlternative Fuels Clean Cities Reflects on 20onFuels

  3. Dallas County, 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 onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnualProperty EditCalifornia:PowerCER.pngRoofs andCrops Ltd Jump1-EA Jump to:Crosse,Argentina

  4. COOL YOUNG STARS IN THE NORTHERN HEMISPHERE: {beta} PICTORIS AND AB DORADUS MOVING GROUP CANDIDATES

    SciTech Connect (OSTI)

    Schlieder, Joshua E.; Simon, Michal [Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY 11794 (United States); Lepine, Sebastien, E-mail: michal.simon@stonybrook.edu, E-mail: schlieder@mpia-hd.mpg.de, E-mail: lepine@amnh.org [Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 (United States)

    2012-04-15T23:59:59.000Z

    As part of our continuing effort to identify new, low-mass members of nearby, young moving groups (NYMGs), we present a list of young, low-mass candidates in the northern hemisphere. We used our proven proper-motion selection procedure and ROSAT X-ray and GALEX-UV activity indicators to identify 204 young stars as candidate members of the {beta} Pictoris and AB Doradus NYMGs. Definitive membership assignment of a given candidate will require a measurement of its radial velocity and distance. We present a simple system of indices to characterize the young candidates and help prioritize follow-up observations. New group members identified in this candidate list will be high priority targets for (1) exoplanet direct imaging searches, (2) the study of post-T-Tauri astrophysics, (3) understanding recent local star formation, and (4) the study of local galactic kinematics. Information available now allows us to identify eight likely new members in the list. Two of these, a late-K and an early-M dwarf, we find to be likely members of the {beta} Pic group. The other six stars are likely members of the AB Dor moving group. These include an M dwarf triple system, and three very cool objects that may be young brown dwarfs, making them the lowest-mass, isolated objects proposed in the AB Dor moving group to date.

  5. Presented by the UT Dallas Career Center UT Dallas Fall Career Expo Days STEM Day | Friday, Sept. 26, 2014

    E-Print Network [OSTI]

    O'Toole, Alice J.

    , SAP, & Cyber Security Computer Engineering, Computer Science, Software Engineering, Systems, Software Engineering, Systems Engineering and Management, MIS, ITM Bachelors, Masters Full-time, Interns Bachelors Full-time Unable to consider Availity Developer, Product Owner, Scrum Master, Project Manager All

  6. Log of a young author's thinking: George W. Cable's "Drop Shot".

    E-Print Network [OSTI]

    Sinitiere, Autry James

    1974-01-01T23:59:59.000Z

    . . t 1974 Major Subject: English LOG OF A YOUNG AUTHOR'S THINKING: GEORGE W CABLE'S "DROP SHOT" A Thesis by AUTRY JAMES SINITIERE Approved as to style and content by: Chairman of Committe Hea of Department M er ember) August 1974 & s ~~. )$, gg... APSTRACT Log of a Young Author's Thinking: George W. Cable's "Drop Shot" (August 1974) Autry James Sinitiere, B. A. , College of Santa Fe Chairman of Advisory Committee: Dr Richard H. Ballinger In February 1870 George W. Cable began writing a * p p...

  7. Young Pulsars and the Galactic Center GeV Gamma-ray Excess

    E-Print Network [OSTI]

    O'Leary, Ryan M; Kerr, Matthew; Dexter, Jason

    2015-01-01T23:59:59.000Z

    Studies of Fermi data indicate an excess of GeV gamma rays around the Galactic center (GC), possibly due to dark matter. We show that young gamma-ray pulsars can yield a similar signal. First, a high concentration of GC supernovae naturally leads to a population of kicked pulsars symmetric about the GC. Second, while very-young pulsars with soft spectra reside near the Galactic plane, pulsars with spectra that have hardened with age accumulate at larger angles. This combination, including unresolved foreground pulsars, traces the morphology and spectrum of the Excess.

  8. Young Pulsars and the Galactic Center GeV Gamma-ray Excess

    E-Print Network [OSTI]

    Ryan M. O'Leary; Matthew D. Kistler; Matthew Kerr; Jason Dexter

    2015-04-09T23:59:59.000Z

    Studies of Fermi data indicate an excess of GeV gamma rays around the Galactic center (GC), possibly due to dark matter. We show that young gamma-ray pulsars can yield a similar signal. First, a high concentration of GC supernovae naturally leads to a population of kicked pulsars symmetric about the GC. Second, while very-young pulsars with soft spectra reside near the Galactic plane, pulsars with spectra that have hardened with age accumulate at larger angles. This combination, including unresolved foreground pulsars, traces the morphology and spectrum of the Excess.

  9. Structure and Evolution of Circumstellar Disks Around Young Stars: New Views from ISO

    E-Print Network [OSTI]

    Michael R. Meyer; Steven V. W. Beckwith

    2000-01-31T23:59:59.000Z

    A question central to understanding the origin of our solar system is: how do planets form in circumstellar disks around young stars? Because of the complex nature of the physical processes involved, multi-wavelength observations of large samples will be required in order to obtain a complete answer to this question. Surveys undertaken with ISO have helped to solve pieces of this puzzle in addition to uncovering new mysteries. We review a variety of studies aimed at understanding; i) the physical structure and composition of circumstellar disks commonly found surrounding young stellar objects; and ii) the evolution of circumstellar disks from the active accretion phase to post-planet building debris disks.

  10. Interspecific Variability of Biomass Production of Young Coffea: No Influence of Branch Pruning. Experimental Evidence and Theoretical Analysis

    E-Print Network [OSTI]

    Boyer, Edmond

    Interspecific Variability of Biomass Production of Young Coffea: No Influence of Branch Pruning diversity and architectural plasticity. In this study, we investigated the biomass production and allocation treatment had no influence on biomass production and allocation for these young trees. We propose

  11. You are invited to the 8th Annual Africa Institute of South Africa's (AISA) Young Graduates and Scholars Conference

    E-Print Network [OSTI]

    Wagner, Stephan

    You are invited to the 8th Annual Africa Institute of South Africa's (AISA) Young Graduates, Botswana, Belgium, Kenya, and South Africa. The participants are from multidisciplinary backgrounds. Key Institute of South Africa's (AISA) Young Graduates and Scholars Conference (AYGS) University of Johannesburg

  12. Spatiotemporal Pattern Recognition via Liquid State Machines Eric Goodman, Sandia National Laboratories, and Dan Ventura, Brigham Young University

    E-Print Network [OSTI]

    Martinez, Tony R.

    Laboratories, and Dan Ventura, Brigham Young University Abstract-- The applicability of complex networks- odm@sandia.gov). Dan Ventura is with the Department of Computer Science, Brigham Young University, Provo, UT 84602, USA (email: ventura@cs.byu.edu). 1T is defined as the set of real numbers, R, with some

  13. The relationship of metabolic rate to rate of gain in young beef cattle

    E-Print Network [OSTI]

    Burns, Kenneth Harold

    1952-01-01T23:59:59.000Z

    and growt? rate, and l7-keto steriods against growth rates, but when the two were combined a very signifi- cant correlation was reported. PROCEI3UBE The first trial was conducted during the spring of 1951 on young beef bulls which were the get of sires...

  14. Effect of the Young modulus variability on the mechanical behaviour of a nuclear containment vessel

    E-Print Network [OSTI]

    Effect of the Young modulus variability on the mechanical behaviour of a nuclear containment vessel on the mechanical behaviour of a nuclear containment vessel in case of a loss of cooling agent accident and under values are observed. Preprint submitted to Nuclear Engineering and Design April 19, 2010 hal-00542640

  15. UCLA-DOE Biochemistry Instrumentation Facility: The following equipment is located in Room 5062 Young Hall

    E-Print Network [OSTI]

    Koehler, Carla

    Young Hall: Nexcelom Bioscience Automatic Cell Counter (Cellometer Auto M10) Thermo Scientific Nanodrop 2000 Spectrophotometer Hewlett-Packard HP8453 diode-array UV/Visible spectrophotometer with Peltier Dichroism spectrophotometer, with Peltier temperature control and auto-titration attachments Applied

  16. A Brochure by and for Young People I Think I Might Be Bisexual,

    E-Print Network [OSTI]

    Xuan, Dong

    - erosexual and lesbian and gay people. Many people are bisexual and bisexuality cuts across distinctions- tionship that lasts for decades. Many bisexual people have no sexual relationships or have, HIV, and other STDs. Many young people - gay, straight, or bisexual - choose acti

  17. Unsolved problems for young and old 1 The lure of an unsolved problem

    E-Print Network [OSTI]

    Do, Norman

    Norman Do Unsolved problems for young and old 1 The lure of an unsolved problem In his superb by Andrew Wiles after an incredible eight years of continuous toil spent searching for the Holy Grail on the backs of envelopes, #12;84 Norman Do and passed on by word of mouth until some very clever person can

  18. We often think about energy in personal terms. People comment on the energy young children

    E-Print Network [OSTI]

    Hardy, Darel

    Overview We often think about energy in personal terms. People comment on the energy young children seem to possess. Others mention that they don't feel they have enough energy to make it through the day. We've heard that the world is running out of certain types of energy. In spite of all of our everyday

  19. An empirical framework for tropical cyclone climatology Nam-Young Kang James B. Elsner

    E-Print Network [OSTI]

    Elsner, James B.

    on defining activity with indices like the Accumulated Cyclone Energy (ACE) and Power Dissipation Index (PDI used exponent indices like accumulated cyclone energy, it does not contain cyclone duration. EmpiricalAn empirical framework for tropical cyclone climatology Nam-Young Kang · James B. Elsner Received

  20. Digestibility and energy retention by young rabbits fed different levels of intake

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Note Digestibility and energy retention by young rabbits fed different levels of intake Fernando in digestibility cages, were fed a standard diet at four levels of intake: ad libitum (AL), 60, 40 and 10 % of the AL intake. Digestibility of dietary dry matter, organic matter, crude protein, ether extract and ash

  1. YOUNG JIN LEE, PH D 3756 Gilman, Department of chemistry, Iowa State University, Ames, IA

    E-Print Network [OSTI]

    Clemmer, David E.

    Spectrometry Imaging for the Localization of Plant Lipids in High Spatial Resolution", Young Jin Lee, Gordon, Galveston, TX. 2. "Single Cell Level, High Spatial Resolution Mass Spectrometry Imaging for Plant activated dissociation of some high mass ions; Analysis of mass-analyzed ion kinetic energy peak shapes", Y

  2. Young Physicists Program: May 2011 Lab 8: Radiation and Nuclear Physics-Do

    E-Print Network [OSTI]

    Onuchic, José

    Young Physicists Program: May 2011 Lab 8: Radiation and Nuclear Physics- Do Not Lick Laboratory: Types of radiation, sources of radiation, and shielding Introduction The purpose of this lab is to study the various types of radiation, their role in everyday and exceptional phenomena, and to also understand some

  3. Hot stars in young massive clusters: Mapping the current Galactic metallicity

    E-Print Network [OSTI]

    Figer, Donald F.

    for Detectors, Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623, USA (4) Instituto). Notice the different flux scales. ACKNOWLEDGEMENTS: This project is partially supported by the Spanish extincted regions of the Galactic disk. Also, the young ages of blue massive stars (

  4. Be production-rate calibration for the Arctic NICOLA S E. YOUNG,1,2

    E-Print Network [OSTI]

    Briner, Jason P.

    A 10 Be production-rate calibration for the Arctic NICOLA´ S E. YOUNG,1,2 * JOERG M. SCHAEFER,1 2013; Accepted 18 April 2013 ABSTRACT: We present a Baffin Bay 10 Be production-rate calibration published 10 Be calibration datasets to develop an Arctic 10 Be production rate. Our calibration comprises

  5. INEOS Scholarship Opportunity 2013 INEOS is a young and vibrant leading petrochemical company which has grown

    E-Print Network [OSTI]

    Painter, Kevin

    INEOS Scholarship Opportunity 2013 INEOS is a young and vibrant leading petrochemical company which employees in the company success. The Grangemouth refinery and petrochemicals facility is the largest INEOS and the petrochemical plants. Located 20 miles west of Edinburgh on a 1700-acre site, the petrochemicals facility

  6. The Astrophysical Journal, in press A Determination of the Coronal Emission Measure Distribution in the Young

    E-Print Network [OSTI]

    Guedel, Manuel

    to this temperature regime. We argue that the DEM distribution seen in EK Dra is induced by the propertiesThe Astrophysical Journal, in press A Determination of the Coronal Emission Measure Distribution of a coronal differential emission measure (DEM) analysis of the nearby analog of the young Sun, EK Draconis

  7. Top-Down Influence in Young Children's Linguistic Ambiguity Resolution Hugh Rabagliati

    E-Print Network [OSTI]

    Pylkkänen, Liina

    Top-Down Influence in Young Children's Linguistic Ambiguity Resolution Hugh Rabagliati New York adults resolve syntactic ambiguities by integrating a variety of cues, children are less sensitive to top-down evidence. We test whether this top-down insensitivity is specific to syntax or a general feature

  8. A Scalable Multi-Engine Xpress9 Compressor with Asynchronous Data Transfer Joo-Young Kim

    E-Print Network [OSTI]

    Hauck, Scott

    to the host, which makes the proposed compressor useful under multi-threaded server environment. II. XPRESS9A Scalable Multi-Engine Xpress9 Compressor with Asynchronous Data Transfer Joo-Young Kim Microsoft as a PCIe accelerator to achieve CPU resource saving and high power efficiency. The proposed compressor

  9. EA-1974: Wallooskee-Youngs Confluence Restoration Project, Clatsop County, Oregon

    Broader source: Energy.gov [DOE]

    Bonneville Power Administration is preparing an EA to assess the potential environmental impacts of the proposed restoration of a tidal marsh in the Columbia River Estuary, near Astoria in Clatsop County, Oregon. The project website is https://www.bpa.gov/goto/WallooskeeYoungs.

  10. Demo Abstract: Energy Transference for Sensornets Affan A. Syed Young Cho John Heidemann

    E-Print Network [OSTI]

    Heidemann, John

    Demo Abstract: Energy Transference for Sensornets Affan A. Syed Young Cho John Heidemann USC continuous monitoring, 24x7, at remote, inaccessible locations making energy man- agement a critical part of most sensornets. The sensornet research community has explored energy conservation and energy

  11. Atmosphere-crust coupling and carbon sequestration on the young Mars Professor Martin R. Lee1

    E-Print Network [OSTI]

    Guo, Zaoyang

    Atmosphere-crust coupling and carbon sequestration on the young Mars Professor Martin R. Lee1 *, Dr the idea that CO2 was `scrubbed' by precipitation of carbonate minerals within the planet's crust - a reaction termed `carbonation'. This project will seek evidence for carbonation by analysis of martian

  12. Young drivers and the efficacy of the Texas drug and alcohol driving awareness program

    E-Print Network [OSTI]

    Darnell, Richard

    2009-05-15T23:59:59.000Z

    The purpose of this study was to examine the efficacy of the Texas Drug and Alcohol Driving Awareness Program (TDADAP) in relation to alcohol-related offenses among young drivers. Participants in this study were students in pre-license programs...

  13. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.56) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.56) Track: Technical CONNECTING THE OFFSHORE WIND AND WAVE RESOURCE CALCULATIONS (abstract-ID: 462) Gregor Giebel (Risø DTU, Wind Energy Department, Denmark) Teresa Pontes, Portugal (1) Rebecca Barthelmie

  14. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.206) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.206) Track: Technical INVESTIGATION OF THE MEASUREMENT OF THE WIND SPEED STANDARD DEVIATION USING) Siemens wind power The LiDAR seems to be an effective alternative to met masts measurements of wind

  15. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.201) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.201) Track: Technical OPERATIONAL EXPERIENCE AND ANALYSIS OF A SPINNER ANEMOMETER ON A MW SIZE WIND TURBINE (abstract-ID: 356) Troels Friis Pedersen (Risø DTU, Wind Energy Department, Denmark) Uwe Schmidt

  16. EUROMECH Young Scientist Prize Paper "Cavitation in rubber: The role of elasticity"

    E-Print Network [OSTI]

    Lopez-Pamies, Oscar

    EUROMECH Young Scientist Prize Paper "Cavitation in rubber: The role of elasticity" AUTHOR won suddenly "appear" in the interior of rubber. This phenomenon has come to be popularly known as cavitation. It corresponds, at heart, to nothing more than to the growth of defects inherent in rubber. Such defects can

  17. Discovery of a luminous white dwarf in a young star cluster in the Large Magellanic Cloud

    E-Print Network [OSTI]

    Rebecca A. W. Elson; Steinn Sigurdsson; Jarrod Hurley; Melvyn B. Davies; Gerard F. Gilmore

    1998-03-19T23:59:59.000Z

    We have identified a candidate 1-2 x 10^5 year old luminous white dwarf in NGC 1818, a young star cluster in the Large Magellanic Cloud. This discovery strongly constrains the boundary mass M_c at which stars stop forming neutron stars and start forming white dwarfs, to M_c > 7.6 Msun.

  18. Water movement and its resistance in young trees of Cryptomeria japonica

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Water movement and its resistance in young trees of Cryptomeria japonica H. Yahata Laboratory Information about water flow resistance is essential to understanding and simulating water movement in trees japonica and no data are available on the gradient of water potential in intact stem. This study

  19. CONSIDERATION OF THREE PROPOSED MODELS OF THE MIGRATION OF YOUNG SKIPJACK TUNA (KATSUWONUS PELAMIS)

    E-Print Network [OSTI]

    CONSIDERATION OF THREE PROPOSED MODELS OF THE MIGRATION OF YOUNG SKIPJACK TUNA (KATSUWONUS PELAMIS (KatsuUJonus pelamis) in in the eastern Pacific Ocean have a central racific spawning origin. Three (Katsuwonus pelamis) are widely distributed in tropical and subtropical surface waters of world oceans

  20. Metal-Slit Array Fresnel-Lens for Optical Coupling Young Jin Jung1

    E-Print Network [OSTI]

    Park, Namkyoo

    Metal-Slit Array Fresnel-Lens for Optical Coupling Young Jin Jung1 , Dongwon Park1 , Sunkyu Yu1, for the first time, to utilize metal-slits array Fresnel lens for the optical coupling form free space into silicon slab waveguide while overcoming near focal length limit of the conventional dielectric Fresnel

  1. SIZE COMPOSITION AND GROWTH OF YOUNG ROCK CRAB, CANCER IRRORATUS, ON A ROCKY BEACH IN MAINE!

    E-Print Network [OSTI]

    . Because rock crab is a valuable commercial species as well as an important food source of lobsters (EnnisSIZE COMPOSITION AND GROWTH OF YOUNG ROCK CRAB, CANCER IRRORATUS, ON A ROCKY BEACH IN MAINE! JAY S KROUSE' ABSTRACT Monthly hand collections of small rock crab, Cancer irrorallls, were made from

  2. Electronic and structural properties of carbon nanohorns Savas Berber, Young-Kyun Kwon,* and David Tomanek

    E-Print Network [OSTI]

    -shaped structures, called ``nanohorns,'' using the CO2 laser ablation technique at room temperature in absence as the disintegration behavior of nanohorns at high temperatures. Cones can be formed by cutting a wedge from planarElectronic and structural properties of carbon nanohorns Savas Berber, Young-Kyun Kwon,* and David

  3. Accretion/Jet Activity and Narrow [O III] Kinematics in Young Radio Galaxies

    E-Print Network [OSTI]

    Wu, Qingwen; Humphrey, Andrew

    2009-01-01T23:59:59.000Z

    We estimate black hole masses and Eddington ratios for a sample of 81 young radio galaxies (42 CSS +39 GPS). We find that the average black hole (BH) mass of these young radio galaxies is ~8.3, which is less than that of radio loud QSOs and low redshift radio galaxies. The CSS/GPS sources have relatively high Eddington ratios, with an average value of =-0.75, which are similar to those of narrow line Seyfert 1 galaxies (NLS1s). This suggests that young radio galaxies may not only be in the early stages of their radio activity, but also in the early stage of their accretion activity. We find that the young radio galaxies as a class deviate systematically from M_bh-\\sigma relation defined by nearby inactive galaxies, when using [O III] as a surrogate for stellar velocity dispersion, \\sigma_* . We also find that the deviation of the [O III] line width is correlated with the Eddington ratio and sources with Lbol/LEdd~1 have the largest deviations, which are similar to those of radio quiet QSOs/NLS1s (radio jets i...

  4. Optical Third-Harmonic Generation in Graphene Sung-Young Hong,1

    E-Print Network [OSTI]

    Hone, James

    Optical Third-Harmonic Generation in Graphene Sung-Young Hong,1 Jerry I. Dadap,2,* Nicholas Petrone York 10027, USA (Received 8 April 2013; published 10 June 2013) We report strong third-harmonic verified. In addition, our polarization- and azimuthal-rotation-dependent third-harmonic

  5. Cloud Computing: a Perspective Study Lizhe WANG, Gregor von LASZEWSKI, Younge ANDREW, Xi HE

    E-Print Network [OSTI]

    Cloud Computing: a Perspective Study Lizhe WANG, Gregor von LASZEWSKI, Younge ANDREW, Xi HE Service@ntu.edu.sg Received 1 Dec 2008 Abstract The Cloud computing emerges as a new computing paradigm which aims to provide study the Cloud computing paradigm from various aspects, such as definitions, distinct features

  6. Achieving Pareto Optimality Through Distributed Learning Jason R. Marden, H. Peyton Young, and Lucy Y. Pao

    E-Print Network [OSTI]

    Marden, Jason R.

    , United Kingdom, peyton.young@nuffield.ox.ac.uk. Lucy Y. Pao is with the Department of Electrical in networks and the design and control of wind farms. The proof of the proposed learning algorithm relies-09-1-0751 and #N00014-12-1-0643, and the Center for Research and Education in Wind. The conference version

  7. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.210) Track: Technical

    E-Print Network [OSTI]

    , United Kingdom (1) Ioannis Antoniou, Spain (1) Stuart Bradley, Greece (2) Sabine Von Hunerbein, United interest for the introduction these techniques in wind energy is therefore present. The UPWIND EUSession: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO

  8. Time-resolved dynamics in acetonitrile cluster anions CH3CN Ryan M. Young a

    E-Print Network [OSTI]

    Neumark, Daniel M.

    Time-resolved dynamics in acetonitrile cluster anions ðCH3CN�� n Ryan M. Young a , Graham B December 2009 a b s t r a c t Excited state dynamics of acetonitrile cluster anions, ðCH3CN�� n , were, antiparallel solvent molecules [19,20]. Evidence for two electron solvation motifs in acetonitrile also comes

  9. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.65) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO FOR OFFSHORE WIND POWER (abstract-ID: 252) Pierre Pinson (DTU-Informatics and Mathematical Modelling, , Denmark (5) Risø DTU (6) DONG Energy Generation (7) Vattenfall One of the benefits of Offshore Wind Power

  10. International Workshop of Young Doctors in Geomechanics -W(H)YDOC 08 ereira, De Gennaro & Delage (eds) 2008, ENPC, Champs-sur-Marne

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 ereira, De Gennaro international workshop of young doctors in geomechanics W(h)ydoc 08, novembre 19-21, 2008, France (2008)" #12

  11. Geographical and seasonal variability of the global "practical" wind Cristina L. Archer a,*, Mark Z. Jacobson b

    E-Print Network [OSTI]

    technical, practical, or economic e existed. Using petroleum as an anal- ogy, the theoretical wind power; 3) global model maps evaluated against data are not available at high-resolution, either spatially

  12. Young red supergiants and the near infrared light appearance of disk galaxies

    E-Print Network [OSTI]

    James E. Rhoads

    1997-10-17T23:59:59.000Z

    Disk galaxies often show prominent nonaxisymmetric features at near-infrared wavelengths. Such features may indicate variations in the surface density of stellar mass, contributions from young red supergiants in star forming regions, or substantial dust obscuration. To distinguish among these possibilities, we have searched for spatial variations in the 2.3 micron photometric CO index within the disks of three nearby galaxies (NGC 278, NGC 2649, & NGC 5713). This index measures the strength of the absorption bands of molecular CO in stellar atmospheres, and is strong in cool, low surface-gravity stars, reaching the largest values for red supergiants. We observe significant spatial CO index variations in two galaxies (NGC 278 & NGC 5713), indicating that the dominant stellar population in the near-infrared is not everywhere the same. Central CO index peaks are present in two galaxies; these could be due to either metallicity gradients or recent star formation activity. In addition, significant azimuthal CO index variations are seen in NGC 278. Because strong azimuthal metallicity gradients are physically implausible in disk galaxies, these features are most naturally explained by the presence of a young stellar population. The fraction of 2 micron light due to young stellar populations in star forming regions can be calculated from our data. Overall, young stellar populations can contribute ~3% of a (normal) galaxy's near infrared flux. Locally, this fraction may rise to ~33%. Thus, young stars do not dominate the total near infrared flux, but can be locally dominant in star forming regions, and can bias estimates of spiral arm amplitude or other nonaxisymmetric structures in galaxies' mass distributions.

  13. Oran R. Young, Leslie A. King, and Heike Schroeder, Eds., Institutions and Environmental Change: Principal Findings, Applications, and Research Frontiers : The MIT Press, Boston, MA, 2008, 400 pp., paperback, ISBN 978-0-262-74033-3

    E-Print Network [OSTI]

    Gellers, Josh

    2010-01-01T23:59:59.000Z

    incorporate multiple performance indicators. Young’s chapterindicators,’’ public commitments, and the creation or strengthening of environ- mental norms as well as economic performance

  14. Bio-inspired Active Soft Orthotic Device for Ankle Foot Pathologies Yong-Lae Park, Bor-rong Chen, Diana Young, Leia Stirling,

    E-Print Network [OSTI]

    Napp, Nils

    , Diana Young, Leia Stirling, Robert J. Wood, Eugene Goldfield, and Radhika Nagpal Abstract-- We describe of the NSF. Y.-L. Park, D. Young, and L. Stirling are with the Wyss Institute, Harvard University, Boston, MA 02115. {ylpark, diana.young, leia.stirling}@wyss.harvard.edu B. Chen is with the School of Engineering

  15. Low-Energy X-ray Emission from Young Isolated Neutron Stars

    E-Print Network [OSTI]

    M. Ruderman

    2003-10-28T23:59:59.000Z

    A young neutron star with large spin-down power is expected to be closely surrounded by an e+/- pair plasma maintained by the conversion of gamma-rays associated with the star's polar-cap and/or outer-gap accelerators. Cyclotron-resonance scattering by the e- and e+ within several radii of such neutron stars prevents direct observations of thermal X-rays from the stellar surface. Estimates are presented for the parameters of the Planck-like X-radiation which ultimately diffuses out through this region. Comparisons with observations, especially of apparent blackbody emission areas as a function of neutron star age, support the proposition that we are learning about a neutron star's magnetosphere rather than about its surface from observations of young neutron star thermal X-rays.

  16. Effects of Turbulence on Cosmic Ray Propagation in Protostars and Young Star/Disk Systems

    E-Print Network [OSTI]

    Fatuzzo, Marco

    2014-01-01T23:59:59.000Z

    The magnetic fields associated with young stellar objects are expected to have an hour-glass geometry, i.e., the magnetic field lines are pinched as they thread the equatorial plane surrounding the forming star but merge smoothly onto a background field at large distances. With this field configuration, incoming cosmic rays experience both a funneling effect that acts to enhance the flux impinging on the circumstellar disk and a magnetic mirroring effect that acts to reduce that flux. To leading order, these effects nearly cancel out for simple underlying magnetic field structures. However, the environments surrounding young stellar objects are expected to be highly turbulent. This paper shows how the presence of magnetic field fluctuations affects the process of magnetic mirroring, and thereby changes the flux of cosmic rays striking circumstellar disks. Turbulence has two principle effects: 1) The (single) location of the magnetic mirror point found in the absence of turbulence is replaced with a wide distr...

  17. Young Stars in the Camelopardalis Dust and Molecular Clouds. III. the GL 490 Region

    E-Print Network [OSTI]

    V. Straizys; V. Laugalys

    2008-03-17T23:59:59.000Z

    Using the infrared photometry data extracted from the 2MASS, IRAS and MSX databases, 50 suspected young stellar objects (YSOs) are selected from about 37500 infrared objects in the 3x3 deg area with the center at Galactic longitude 142.5 deg and latitude +1.0 deg, in the vicinity of the young stellar object GL 490 in the dark cloud DoH 942 (Dobashi et al. 2005). The spectral energy distributions between 700 nm and 100 mum suggest that most of the selected objects may be YSOs of classes I and II. In the color-magnitude diagram K_s vs. H-K_s the suspected YSOs occupy an area right of the main sequence what can be interpreted as being caused by the effects of luminosity, interstellar and circumstellar reddening and infrared thermal emission in circumstellar envelopes and disks.

  18. Can a variable gravitational constant resolve the Faint Young Sun Paradox ?

    E-Print Network [OSTI]

    Varun Sahni; Yuri Shtanov

    2014-11-05T23:59:59.000Z

    Solar models suggest that four billion years ago the young Sun was about 25% fainter than it is today, rendering Earth's oceans frozen and lifeless. However, there is ample geophysical evidence that Earth had a liquid ocean teeming with life 4 Gyr ago. Since ${\\cal L_\\odot} \\propto G^7M_\\odot^5$, the Sun's luminosity ${\\cal L_\\odot}$ is exceedingly sensitive to small changes in the gravitational constant $G$. We show that a percent-level increase in $G$ in the past would have prevented Earth's oceans from freezing, resolving the faint young Sun paradox. Such small changes in $G$ are consistent with observational bounds on ${\\Delta G}/G$. Since ${\\cal L}_{\\rm SNIa} \\propto G^{-3/2}$, an increase in $G$ leads to fainter supernovae, creating tension between standard candle and standard ruler probes of dark energy. Precisely such a tension has recently been reported by the Planck team.

  19. Un-Ki Yang, Young-kee Kim University of Chicago

    E-Print Network [OSTI]

    Un-Ki Yang, Young-kee Kim University of Chicago MC workshop, Dec 04, 2003 ISR studies onISR studiesV #12;Comparison of Herwig and Pythia with diff. tuning [parameters] 1.452.502.50 (D=1) parp(91) Kt_sigma (intrinsic parton pt in proton) 1515 (D=5) parp(93) Kt_max (Kt cut-off) 10.21 (=D) parp(64) K facotor

  20. BAYESIAN ANALYSIS TO IDENTIFY NEW STAR CANDIDATES IN NEARBY YOUNG STELLAR KINEMATIC GROUPS

    SciTech Connect (OSTI)

    Malo, Lison; Doyon, Rene; Lafreniere, David; Artigau, Etienne; Gagne, Jonathan; Baron, Frederique [Departement de physique and Observatoire du Mont-Megantic, Universite de Montreal, Montreal, QC H3C 3J7 (Canada)] [Departement de physique and Observatoire du Mont-Megantic, Universite de Montreal, Montreal, QC H3C 3J7 (Canada); Riedel, Adric, E-mail: malo@astro.umontreal.ca, E-mail: doyon@astro.umontreal.ca, E-mail: david@astro.umontreal.ca, E-mail: artigau@astro.umontreal.ca, E-mail: gagne@astro.umontreal.ca, E-mail: baron@astro.umontreal.ca, E-mail: riedel@phy-astr.gsu.edu [Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 (United States)] [Department of Astrophysics, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 (United States)

    2013-01-10T23:59:59.000Z

    We present a new method based on a Bayesian analysis to identify new members of nearby young kinematic groups. The analysis minimally takes into account the position, proper motion, magnitude, and color of a star, but other observables can be readily added (e.g., radial velocity, distance). We use this method to find new young low-mass stars in the {beta} Pictoris and AB Doradus moving groups and in the TW Hydrae, Tucana-Horologium, Columba, Carina, and Argus associations. Starting from a sample of 758 mid-K to mid-M (K5V-M5V) stars showing youth indicators such as H{alpha} and X-ray emission, our analysis yields 214 new highly probable low-mass members of the kinematic groups analyzed. One is in TW Hydrae, 37 in {beta} Pictoris, 17 in Tucana-Horologium, 20 in Columba, 6 in Carina, 50 in Argus, 32 in AB Doradus, and the remaining 51 candidates are likely young but have an ambiguous membership to more than one association. The false alarm rate for new candidates is estimated to be 5% for {beta} Pictoris and TW Hydrae, 10% for Tucana-Horologium, Columba, Carina, and Argus, and 14% for AB Doradus. Our analysis confirms the membership of 58 stars proposed in the literature. Firm membership confirmation of our new candidates will require measurement of their radial velocity (predicted by our analysis), parallax, and lithium 6708 A equivalent width. We have initiated these follow-up observations for a number of candidates, and we have identified two stars (2MASSJ01112542+1526214, 2MASSJ05241914-1601153) as very strong candidate members of the {beta} Pictoris moving group and one strong candidate member (2MASSJ05332558-5117131) of the Tucana-Horologium association; these three stars have radial velocity measurements confirming their membership and lithium detections consistent with young age.

  1. Recognition criteria for young multiple surface ruptures along the Meers fault in southwestern Oklahoma

    E-Print Network [OSTI]

    Westen, Diane Paula

    1985-01-01T23:59:59.000Z

    fault planes in a stream cut exposure in young unconsolidated alluvium, and the possibility of segmentation based on changes in fault strike. The evidence suggests that abrupt, discrete stress-release events break the surface along different scarp-lines...) recognized the fault trace as a straight, continuous line cutting Permian sediments, remarkably fresh in appearance. He postulated that the fault was associated with intense orogenic movement of a deep-seated origin. Subsequent authors have associated...

  2. An extremely young massive clump forming by gravitational collapse in a primordial galaxy

    E-Print Network [OSTI]

    Zanella, A; Floc'h, E Le; Bournaud, F; Gobat, R; Valentino, F; Strazzullo, V; Cibinel, A; Onodera, M; Perret, V; Renaud, F; Vignali, C

    2015-01-01T23:59:59.000Z

    When the cosmic star formation history peaks (z ~ 2), galaxies vigorously fed by cosmic reservoirs are gas dominated and contain massive star-forming clumps, thought to form by violent gravitational instabilities in highly turbulent gas-rich disks. However, a clump formation event has not been witnessed yet, and it is debated whether clumps survive energetic feedback from young stars, thus migrating inwards to form galaxy bulges. Here we report spatially resolved spectroscopy of a bright off-nuclear emission line region in a galaxy at z = 1.987. Although this region dominates the star formation in the galaxy disk, its stellar continuum remains undetected in deep imaging, revealing an extremely young (age 10$^9$ M$_{\\odot}$ of gas. Gas consumption in this young clump is > 10 times faster than in the host galaxy, displaying high star formation efficiency during this phase, in agreement with our hydrodynamic simulations. The frequency of older clumps with similar masses coupled with our initial estimate of thei...

  3. Mapping the Outer Edge of the Young Stellar Cluster in the Galactic Center

    E-Print Network [OSTI]

    Støstad, Morten N; Murray, Norm; Lu, Jessica R; Yelda, Sylvana; Ghez, Andrea M

    2015-01-01T23:59:59.000Z

    We present new near-infrared spectroscopic observations of the outer edges of the young stellar cluster around the supermassive black hole at the Galactic center. The observations show a break in the surface-density profile of young stars at approximately 13 arcsec (0.52 pc). These observations spectroscopically confirm previous suggestions of a break based on photometry. Using Gemini North's Near-Infrared Integral Field Spectrometer (NIFS) we are able to detect and separate early- and late-type stars with a 75% completeness at Ks = 15.5. We sample a region with radii between 7" to 23" (0.28 pc to 0.92 pc) from Sgr A*, and present new spectral classifications of 144 stars brighter than Ks = 15.5, where 140 stars are late-type (> 1 Gyr) and only four stars are early-type (young, 4-6 Myr). A broken power-law fit of the early-type surface-density matches well with our data and previously published values. The projected surface-density of late-type stars is also measured and found to be consistent with previous r...

  4. Search for OB stars running away from young star clusters. I. NGC 6611

    E-Print Network [OSTI]

    V. V. Gvaramadze; D. J. Bomans

    2009-03-04T23:59:59.000Z

    N-body simulations have shown that the dynamical decay of the young (~1 Myr) Orion Nebula cluster could be responsible for the loss of at least half of its initial content of OB stars. This result suggests that other young stellar systems could also lose a significant fraction of their massive stars at the very beginning of their evolution. To confirm this expectation, we used the Mid-Infrared Galactic Plane Survey (completed by the Midcourse Space Experiment satellite) to search for bow shocks around a number of young ($\\la$ several Myr) clusters and OB associations. We discovered dozens of bow shocks generated by OB stars running away from these stellar systems, supporting the idea of significant dynamical loss of OB stars. In this paper, we report the discovery of three bow shocks produced by O-type stars ejected from the open cluster NGC6611 (M16). One of the bow shocks is associated with the O9.5Iab star HD165319, which was suggested to be one of "the best examples for isolated Galactic high-mass star formation" (de Wit et al. 2005, A&A, 437, 247). Possible implications of our results for the origin of field OB stars are discussed.

  5. DEVELOPMENT OF A SCREENING TOOL FOR IDENTIFYING YOUNG PEOPLE AT RISK FOR NOISE-INDUCED HEARING LOSS

    E-Print Network [OSTI]

    Megerson, Susan C.

    2010-07-23T23:59:59.000Z

    This study surveyed common noise activities of young adults, quantified their annual equivalent noise exposures, and examined the efficacy of a self-assessment screening tool for identifying risk of noise-induced hearing ...

  6. "Young Town" growing up : four decades later : self-help housing and upgrading lessons from a squatter neighborhood in Lima

    E-Print Network [OSTI]

    Williams, Susana M. (Susana Maria)

    2005-01-01T23:59:59.000Z

    This thesis examines self-help housing policies in Peru by revisiting Independencia, one of Lima's young towns (squatter settlements), forty-five years after its founding. The study was designed to better understand how ...

  7. Effects of Intra-Articular Lipopolysaccharide Injection on Systemic Cytokine Gene Expression and Leukocyte Population in Young Horses 

    E-Print Network [OSTI]

    Mueller, Carrie

    2012-02-14T23:59:59.000Z

    Nineteen yearling Quarter Horses were utilized in a randomized, complete block design to evaluate systemic cytokine gene expression and circulating leukocyte population in young horses following an intra-articular lipopolysaccharide (LPS) challenge...

  8. Promoting young adolescents򠨹pothesis-development performance in a computer-supported and problem-based learning environment

    E-Print Network [OSTI]

    Kim, Hye Jeong

    2009-05-15T23:59:59.000Z

    In the study, young adolescents’ hypothesis development in a computer-supported and problem-based learning environment was examined in terms of two empirical studies. The first study examined the effect of metacognitive scaffolds to strengthening...

  9. A Low Power High Performance Radix-4 Approximate Squaring Circuit Satyendra R. Datla Mitchell A. Thornton David W. Matula

    E-Print Network [OSTI]

    Thornton, Mitchell

    University Dallas, Texas Dallas, Texas Dallas, Texas sdatla@ti.com mitch@lyle.smu.edu matula@lyle.smu

  10. DISCOVERY OF A YOUNG L DWARF BINARY, SDSS J224953.47+004404.6AB

    SciTech Connect (OSTI)

    Allers, K. N. [Department of Physics and Astronomy, Bucknell University, Lewisburg, PA 17837 (United States); Liu, Michael C.; Dupuy, Trent J.; Cushing, Michael C., E-mail: k.allers@bucknell.ed [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States)

    2010-05-20T23:59:59.000Z

    We report discovery of a young 0.''32 L dwarf binary, SDSS J2249+0044AB, found as the result of a Keck laser guide star adaptive optics imaging survey of young field brown dwarfs. Weak K I, Na I, and FeH features as well as strong VO absorption in the integrated-light J-band spectrum indicate a low surface gravity and hence young age for the system. From spatially resolved K-band spectra we determine spectral types of L3 {+-} 0.5 and L5 {+-} 1 for components A and B, respectively. SDSS J2249+0044A is spectrally very similar to G196-3B, an L3 companion to a young M2.5 field dwarf. Thus, we adopt 100 Myr (the age estimate of the G196-3 system) as the age of SDSS J2249+0044AB, but ages of 12-790 Myr are possible. By comparing our photometry to the absolute magnitudes of G196-3B, we estimate a distance to SDSS J2249+0044AB of 54 {+-} 16 pc and infer a projected separation of 17 {+-} 5 AU for the binary. Comparison of the luminosities to evolutionary models at an age of 100 Myr yields masses of 0.029 {+-} 0.006 and 0.022{sup +0.006}{sub -0.009} M{sub sun} for SDSS J2249+0044A and B, respectively. Over the possible ages of the system (12-790 Myr), the mass of SDSS J2249+0044A could range from 0.011 to 0.070 M{sub sun} and the mass of SDSS J2249+0044B could range from 0.009 to 0.065 M{sub sun}. Evolutionary models predict that either component could be burning deuterium, which could result in a mass ratio as low as 0.4, or alternatively, a reversal in the luminosities of the binary. We find a likely proper motion companion, GSC 00568-01752, which lies 48.''9 away (a projected separation of 2600 AU) and has Sloan Digital Sky Survey and Two Micron All Sky Survey colors consistent with an early M dwarf. We calculate a photometric distance to GSC 00568-01752 of 53 {+-} 15 pc, in good agreement with our distance estimate for SDSS J2249+0044AB. The space motion of SDSS J2249+0044AB shows no obvious coincidence with known young moving groups, though radial velocity and parallax measurements are necessary to refine our analysis. The unusually red near-IR colors, young age, and low masses of the binary make it an important template for studying planetary-mass objects found by direct imaging surveys.

  11. Are superluminous supernovae and long GRBs the products of dynamical processes in young dense star clusters?

    SciTech Connect (OSTI)

    Van den Heuvel, E. P. J. [Astronomical Institute Anton Pannekoek, University of Amsterdam, P.O. Box 94249, 1090 GE Amsterdam (Netherlands); Portegies Zwart, S. F. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands)

    2013-12-20T23:59:59.000Z

    Superluminous supernovae (SLSNe) occur almost exclusively in small galaxies (Small/Large Magellanic Cloud (SMC/LMC)-like or smaller), and the few SLSNe observed in larger star-forming galaxies always occur close to the nuclei of their hosts. Another type of peculiar and highly energetic supernovae are the broad-line Type Ic SNe (SN Ic-BL) that are associated with long-duration gamma-ray bursts (LGRBs). Also these have a strong preference for occurring in small (SMC/LMC-like or smaller) star-forming galaxies, and in these galaxies LGRBs always occur in the brightest spots. Studies of nearby star-forming galaxies that are similar to the hosts of LGRBs show that these brightest spots are giant H II regions produced by massive dense young star clusters with many hundreds of O- and Wolf-Rayet-type stars. Such dense young clusters are also found in abundance within a few hundred parsecs from the nucleus of larger galaxies like our own. We argue that the SLSNe and the SNe Ic-BL/LGRBs are exclusive products of two types of dynamical interactions in dense young star clusters. In our model the high angular momentum of the collapsing stellar cores required for the engines of an SN Ic-BL results from the post-main-sequence mergers of dynamically produced cluster binaries with almost equal-mass components. The merger produces a critically rotating single helium star with sufficient angular momentum to produce an LGRB; the observed 'metal aversion' of LGRBs is a natural consequence of the model. We argue that, on the other hand, SLSNe could be the products of runaway multiple collisions in dense clusters, and we present (and quantize) plausible scenarios of how the different types of SLSNe can be produced.

  12. Detection of steam in the circumstellar disk around a massive Young Stellar Object

    E-Print Network [OSTI]

    W. -F. Thi; A. Bik

    2005-03-24T23:59:59.000Z

    We report on the observation of hot water vapor (steam) in the inner AU of a young massive star located in the star-forming region IRAS 08576-4334. The water lines are detected in a medium resolution (R=10,000) K-band spectrum taken by the infrared spectrometer ISAAC mounted on the VLT-ANTU. The water vapor is at a mean temperature of 1565+/-510 K, cooler than the hot CO found in the same object, which is at 1660K and the column density is N(H2O)=(2.5 +/- 0.4)x1E18 cm-2. The profile of both H2O and CO lines is best reproduced by the emission from a Keplerian disk. To interpret the data, we also investigate the formation of molecules and especially CO and water vapor in the inner hot and dense part of disks around young high mass stars using a pseudo time-dependent gas-phase chemical model. Molecules are rapidly photodissociated but this destruction is compensated by an efficient formation due to fast neutral-neutral reactions. The ability of CO molecules to self-shield significantly enhances its abundance. Water molecules are sufficiently abundant to be detectable. The observed H2O/CO ratio is reproduced by gas at 1600K and an enhanced UV field over gas density ratio I_UV/nH=1E(-4)- 1E(-6). The simulations support the presence of CO and H2O molecules in the inner disks around young massive stars despite the strong UV radiation and show that the OH radical plays an essential role in hot gas chemistry.

  13. Ring shaped 6.7 GHz methanol maser emission around a young high-mass star

    E-Print Network [OSTI]

    A. Bartkiewicz; M. Szymczak; H. J. van Langevelde

    2005-09-21T23:59:59.000Z

    We report on EVN imaging of the 6.7 GHz methanol maser emission from the candidate high-mass protostar G23.657-0.127. The masers originate in a nearly circular ring of 127 mas radius and 12 mas width. The ring structure points at a central exciting object which characteristics are typical for a young massive star; its bolometric luminosity is estimated to be methanol masers originate in a spherical bubble or in a rotating disc seen nearly face-on.

  14. Determinants of sugar-sweetened beverage consumption in young children: a systematic review

    E-Print Network [OSTI]

    Paes, Veena Mazarello; Hesketh, Kathryn; O’Malley, Claire; Moore, Helen; Summerbell, Carolyn; Griffin, Simon; van Sluijs, Esther M. F.; Ong, Ken K.; Lakshman, Rajalakshmi

    2015-01-01T23:59:59.000Z

    review A running title: Determinants of SSB consumption in young children Address of corresponding author and email address: Rajalakshmi Lakshman PhD, MRCP, FFPH, MPH Box 285 MRC Epidemiology Unit and CEDAR University of Cambridge Hills Road... infancy and toddlerhood is associated with child blood pressure at age 7.5 y. The American Journal of Clinical Nutrition. 2013;97(6):1375-86. 23. Lakshman R, Elks CE, Ong KK. Childhood Obesity. Circulation. 2012;126(14):1770- 9. 24. Malik VS, Schulze...

  15. X-ray Luminosity Functions of Young Stars in Taurus-Auriga-Perseus

    E-Print Network [OSTI]

    B. Stelzer

    2000-11-23T23:59:59.000Z

    X-ray luminosity functions (XLF) are frequently used to assess the properties of the X-ray emission from a given sample of stars, and particularly important for a comparison of different groups of stars. I present the results from a detailed analysis of the XLF of pre-main sequence T Tauri Stars in Taurus-Auriga and young main-sequence objects (represented by the Pleiades and Hyades cluster). The study is based on the ROSAT public archive. Various possible biases related to the sample selection are described, and their influence on the luminosity distributions is discussed.

  16. Rewriting Shakespeare: Thomas Otway's Venice Preserv'd and Edward Young's The Revenge

    E-Print Network [OSTI]

    Lovan, Gary Eugene

    1996-01-01T23:59:59.000Z

    Otway's Venice Preserv 'd and Edward Young's The Revenge. (May 1996) Gary Eugene Lovan, B. A. , Texas A8M University Chair of Advisory Committee: Dr. Jefirey Cox From a modern perspective, the plays of Shakespeare are considered by many...? What! Melancholy? Not a word to spare me? Jaff. Fm thinking, Pierre, how that damn'd starving quality Call'd honesty, got footing in the world. Pierre. Why, pow'rful villainy first set it up, For its own ease and safety: honest men Are the soft...

  17. S M Stoller Pinellas Environmental Restoration Project - Young - Rainey Star Center

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA groupTuba City, Arizona, DisposalFourthN V O 1 8 7 +NewAugustr*Sampling4.5Young -

  18. S M Stoller Pinellas Environmental Restoration Project - Young - Rainey Star Center

    Office of Legacy Management (LM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA groupTuba City, Arizona, DisposalFourthN V O 1 8 7 +NewAugustr*Sampling4.5Young

  19. Planets Around Low-Mass Stars (PALMS). III. A Young Dusty L Dwarf Companion at the Deuterium-Burning Limit

    E-Print Network [OSTI]

    Bowler, Brendan P; Shkolnik, Evgenya L; Dupuy, Trent J

    2013-01-01T23:59:59.000Z

    We report the discovery of an L-type companion to the young M3.5V star 2MASS J01225093-2439505 at a projected separation of 1.45" (~52 AU) as part of our adaptive optics imaging search for extrasolar giant planets around young low-mass stars. 2MASS 0122-2439 B has very red near-infrared colors similar to the HR 8799 planets and the reddest known young/dusty L dwarfs in the field. Moderate-resolution (R~3800) 1.5-2.4 $\\mu$m spectroscopy reveals a near-infrared spectral type of L4-L6 and an angular H-band shape, confirming its cool temperature and young age. The kinematics of 2MASS 0122-2439 AB are marginally consistent with members of the ~120 Myr AB Dor young moving group based on the photometric distance to the primary (36 +/- 4 pc) and our radial velocity measurement of 2MASS 0122-2439 A from Keck/HIRES. We adopt the AB Dor group age for the system, but the high energy emission, lack of Li I $\\lambda$6707 absorption, and spectral shape of 2MASS 0122-2439 B suggest a range of ~10-120 Myr is possible. The age...

  20. Obscured clusters.I. GLIMPSE30 - Young Milky Way Star Cluster Hosting Wolf-Rayet Stars

    E-Print Network [OSTI]

    Kurtev, R; Georgiev, L; Ortolani, S; Ivanov, V D

    2007-01-01T23:59:59.000Z

    Young massive clusters are perfect astrophysical laboratories for study of massive stars. Clusters with Wolf-Rayet (WR) stars are of special importance, since this enables us to study a coeval WR population at a uniform metallicity and known age. GLIMPSE30 (G30) is one of them. The cluster is situated near the Galactic plane (l=298.756deg, b=-0.408deg) and we aimed to determine its physical parameters and to investigate its high-mass stellar content and especially WR stars. Our analysis is based on SOFI/NTT JsHKs imaging and low resolution (R~2000) spectroscopy of the brightest cluster members in the K atmospheric window. For the age determination we applied isochrone fits for MS and Pre-MS stars. We derived stellar parameters of the WR stars candidates using a full nonLTE modeling of the observed spectra. Using a variety of techniques we found that G30 is very young cluster, with age t~4Myr. The cluster is located in Carina spiral arm, it is deeply embedded in dust and suffers reddening of Av~10.5+-1.1mag. T...

  1. The blue plume population in dwarf spheroidal galaxies: genuine blue stragglers or young stellar population?

    E-Print Network [OSTI]

    Y. Momany; E. V. Held; I. Saviane; S. Zaggia; L. Rizzi; M. Gullieuszik

    2007-04-11T23:59:59.000Z

    Abridged... Blue stragglers (BSS) are thought to be the product of either primordial or collisional binary systems. In the context of dwarf spheroidal galaxies it is hard to firmly disentangle a genuine BSS population from young main sequence (MS) stars tracing a ~1-2 Gyr old star forming episode. Assuming that their blue plume populations are made of BSS, we estimate the BSS frequency for 8 Local Group non star-forming dwarf galaxies, using a compilation of ground and space based photometry. Our results can be summarized as follows: (i) The BSS frequency in dwarf galaxies, at any given Mv, is always higher than that in globular clusters of similar luminosities; (ii) the BSS frequency for the lowest luminosity dwarf galaxies is in excellent agreement with that observed in the Milky Way halo; and most interestingly (iii) derive a statistically significant anti-correlation between the BSS frequency and the galaxy Mv. The low density, almost collision-less, environments of our dwarf galaxy sample allow us to infer (i) their very low dynamical evolution; (ii) a negligible production of collisional BSS; and consequently (iii) that their blue plumes are mainly made of primordial binaries. The dwarf galaxies anti-correlation can be used as a discriminator: galaxies obeying the anti-correlation are more likely to possess genuine primordial BSS rather than young main sequence stars.

  2. Near-infrared photometry of the young open clusters NGC 1893 and Berkeley 86

    E-Print Network [OSTI]

    Antonella Vallenari; Andrea Richichi; Giovanni Carraro; Leo Girardi

    1999-09-03T23:59:59.000Z

    We present photometry in the J and K near-infrared bands for two regions centered on the young open clusters NGC 1893 and Berkeley 86. We study 700 stars down to K = 17 in the field of NGC 1893, and about 2000 stars in the field of Berkeley 86 down to K$\\sim$ 16.5, for which near-infrared photometry was insofar not available. Coupling J-K data with UBV photometry taken from literature, we produce reddening corrected colour-magnitude diagrams. We find that our data are consistent with previous determinations: the clusters are roughly coeval with an age between 4 and 6 million years. The mean reddening (measured as E(J-K)) values turn out to be 0.35 and 0.50 for NGC 1893 and Berkeley 86, respectively.Using colour-colour plots we discuss the presence of candidate pre-main sequence stars showing infrared excess. Candidates are found in both cluster regions, confirming the young age of these clusters.

  3. Warm Gas in the Inner Disks around Young Intermediate Mass Stars

    E-Print Network [OSTI]

    Sean Brittain; Theodore Simon; Joan Najita; Terrence Rettig

    2006-12-08T23:59:59.000Z

    The characterization of gas in the inner disks around young stars is of particular interest because of its connection to planet formation. In order to study the gas in inner disks, we have obtained high-resolution K-band and M-band spectroscopy of 14 intermediate mass young stars. In sources that have optically thick inner disks, i.e. E(K-L)>1, our detection rate of the ro-vibrational CO transitions is 100% and the gas is thermally excited. Of the five sources that do not have optically thick inner disks, we only detect the ro-vibrational CO transitions from HD 141569. In this case, we show that the gas is excited by UV fluorescence and that the inner disk is devoid of gas and dust. We discuss the plausibility of the various scenarios for forming this inner hole. Our modeling of the UV fluoresced gas suggests an additional method by which to search for and/or place stringent limits on gas in dust depleted regions in disks around Herbig Ae/Be stars.

  4. Theory of Bipolar Outflows from High-Mass Young Stellar Objects

    E-Print Network [OSTI]

    Arieh Konigl

    1999-03-11T23:59:59.000Z

    There is a growing number of observational indicators for the presence of bipolar outflows in massive, young stellar objects that are still accreting mass as part of their formation process. In particular, there is evidence that the outflows from these objects can attain higher velocities and kinetic luminosities than their lower-mass counterparts. Furthermore, the higher-mass objects appear to smoothly continue the correlation found in T Tauri stars between outflow and accretion signatures, and in several cases there are direct clues to the existence of a circumstellar disk from optical and infrared imaging and spectroscopy as well as from millimeter-wavelength interferometry. These results suggest that the disk-outflow connection found in low-mass pre-main-sequence stars extends to more massive objects, and that a similar physical mechanism may drive the outflows in both cases. I examine the observational basis for this hypothesis and consider how the commonly invoked centrifugally driven wind models of bipolar outflows in low-mass stars would be affected by the various physical processes (such as photoionization, photoevaporation, radiation pressure, and stellar wind ram pressure) that operate in higher-mass stars. I then list some of the interesting questions that one could hope to address as this young field of research continues to develop.

  5. PRECISE HIGH-CADENCE TIME SERIES OBSERVATIONS OF FIVE VARIABLE YOUNG STARS IN AURIGA WITH MOST

    SciTech Connect (OSTI)

    Cody, Ann Marie; Tayar, Jamie; Hillenbrand, Lynne A. [Department of Astrophysics, California Institute of Technology, MC 249-17, Pasadena, CA 91125 (United States); Matthews, Jaymie M. [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia V6T 1Z1 (Canada); Kallinger, Thomas, E-mail: amc@ipac.caltech.edu [Institut fuer Astronomie, Universitaet Wien, Tuerkenschanzstrasse 17, A-1180 Vienna (Austria)

    2013-03-15T23:59:59.000Z

    To explore young star variability on a large range of timescales, we have used the MOST satellite to obtain 24 days of continuous, sub-minute cadence, high-precision optical photometry on a field of classical and weak-lined T Tauri stars (TTSs) in the Taurus-Auriga star formation complex. Observations of AB Aurigae, SU Aurigae, V396 Aurigae, V397 Aurigae, and HD 31305 reveal brightness fluctuations at the 1%-10% level on timescales of hours to weeks. We have further assessed the variability properties with Fourier, wavelet, and autocorrelation techniques, identifying one significant period per star. We present spot models in an attempt to fit the periodicities, but find that we cannot fully account for the observed variability. Rather, all stars exhibit a mixture of periodic and aperiodic behavior, with the latter dominating stochastically on timescales less than several days. After removal of the main periodicity, periodograms for each light curve display power-law trends consistent with those seen for other young accreting stars. Several of our targets exhibited unusual variability patterns not anticipated by prior studies, and we propose that this behavior originates with the circumstellar disks. The MOST observations underscore the need for investigation of TTS light variations on a wide range of timescales in order to elucidate the physical processes responsible; we provide guidelines for future time series observations.

  6. New Models for Wolf-Rayet and O Star Populations in Young Starbursts

    E-Print Network [OSTI]

    Daniel Schaerer; William D. Vacca

    1997-11-12T23:59:59.000Z

    Using the latest stellar evolution models, theoretical stellar spectra, and a compilation of observed emission line strengths from Wolf-Rayet (WR) stars, we construct evolutionary synthesis models for young starbursts. We explicitly distinguish between the various WR subtypes (WN, WC, WO), and we treat O and Of stars separately. We provide detailed predictions of UV and optical emission line strengths for both the WR stellar lines and the major nebular hydrogen and helium emission lines, as a function of several input parameters related to the starburst episode. We also derive the theoretical frequency of WR-rich starbursts. We then discuss: nebular HeII 4686 emission, the contribution of WR stars to broad Balmer line emission, techniques used to derive the WR and O star content from integrated spectra, and explore the implications of the formation of WR stars through mass transfer in close binary systems in instantaneous bursts. The observational features predicted by our models allow a detailed quantitative determination of the massive star population in a starburst region (particularly in so-called "WR galaxies") from its integrated spectrum and provide a means of deriving the burst properties (e.g., duration, age) and the parameters of the initial mass function of young starbursts. (Abridged abstract)

  7. The progenitor of the FUor-type young eruptive star 2MASS J06593158-0405277

    E-Print Network [OSTI]

    Kóspál, Á; Moór, A; Haas, M; Chini, R; Hackstein, M

    2015-01-01T23:59:59.000Z

    Only a dozen confirmed FU Orionis-type young outbursting stars (FUors) are known today; this explains the interest in the recent FUor eruption of 2MASS J06593158-0405277. Its outburst and expected decline will be subject to numerous studies in the future. Almost equally important for the understanding of the eruption mechanism, however, is the physical characterization of the FUor's precursor. Here we analyze unpublished archival data and summarize - and partly revise - all relevant photometry from optical to submillimeter wavelengths. Our analysis implies that the FUor is possibly associated with eight T Tauri star candidates and a strong Class 0 source. Adopting a distance of 450 pc for the FUor, we derive a quiescent bolometric luminosity and temperature of L_bol = 4.8 L_Sun and T_bol = 1190 K, typical for young Class II sources. The central star has a temperature of T_eff = 4000 K, a mass of 0.75 M_Sun, and an age of about 6 x 10^5 yr. The SED implies a circumstellar mass of 0.01 - 0.06 M_Sun, and the sys...

  8. Investigating the rotational evolution of young, low mass stars using Monte Carlo simulations

    E-Print Network [OSTI]

    Vasconcelos, M J

    2015-01-01T23:59:59.000Z

    We investigate the rotational evolution of young stars through Monte Carlo simulations. We simulate 280,000 stars, each of which is assigned a mass, a rotational period, and a mass accretion rate. The mass accretion rate depends on mass and time, following power-laws indices 1.4 and -1.5, respectively. A mass-dependent accretion threshold is defined below which a star is considered as diskless, which results in a distribution of disk lifetimes that matches observations. Stars are evolved at constant angular spin rate while accreting and at constant angular momentum when they become diskless. We recover the bimodal period distribution seen in several young clusters. The short period peak consists mostly of diskless stars and the long period one is mainly populated by accreting stars. Both distributions present a long tail towards long periods and a population of slowly rotating diskless stars is observed at all ages. We reproduce the observed correlations between disk fraction and spin rate, as well as between...

  9. Constraining globular cluster formation through studies of young massive clusters - V. ALMA observations of clusters in the Antennae

    E-Print Network [OSTI]

    Cabrera-Ziri, I; Longmore, S N; Brogan, C; Hollyhead, K; Larsen, S S; Whitmore, B; Johnson, K; Chandar, R; Henshaw, J D; Davies, B; Hibbard, J E

    2015-01-01T23:59:59.000Z

    Some formation scenarios that have been put forward to explain multiple populations within Globular Clusters (GCs) require that the young massive cluster have large reservoirs of cold gas within them, which is necessary to form future generations of stars. In this paper we use deep observations taken with Atacama Large Millimeter/sub-millimeter Array (ALMA) to assess the amount of molecular gas within 3 young (50-200 Myr) massive (~10^6 Msun) clusters in the Antennae galaxies. No significant CO(3--2) emission was found associated with any of the three clusters. We place upper limits for the molecular gas within these clusters of ~1x10^5 Msun (or cool gas within young massive clusters at these ages.

  10. Result of International Round Robin Test on Young's Modulus Measurement of 304L and 316L Steels at Cryogenic Temperatures

    SciTech Connect (OSTI)

    Shibata, K. [University of Tokyo - Now, National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047 (Japan); Ogata, T. [National Institute for Materials Science, Tsukuba, Ibaraki, 305-0047 (Japan); Nyilas, A. [Forschungszentrum Karlsruhe, ITP, D-76021 Karlsruhe (Germany); Walsh, R. P.; Toplosky, V. J. [Florida State University, National High Magnetic Field Laboratory, Tallahassee, Florida, FL 32310 (United States); Millet, M. F. [CEA Grenoble, 17 rue des Martyrs, 38054 Grenoble cedex 9 (France); Shindo, Y. [Tohoku University, Sendai, Miyagi, 980-8579 (Japan); Fujii, H.; Ohmiya, S. [Nippon Steel Corporation, Futtsu, Chiba 293-8511 (Japan); Ishio, K. [Japan Steel Works, Ltd. Muroran Research Laboratory, Muroran, Hokkaido, 051-8505 (Japan); Nakajima, H.; Takano, K. [Japan Atomic Energy Research Institute, Naka, Ibaraki, 311-0193 (Japan); Mitterbacher, H. [LINDE LE, Hoellriegelskreuth, 82049 (Germany); Gigante, P. [AIR LIQUIDE - DTA, BP 15, 38360 Sassenage (France)

    2006-03-31T23:59:59.000Z

    Ogata et al. reported in 1996 results of international Round Robin tests on mechanical property measurement of several metals at cryogenic temperatures. Following the report, the standard deviation of Young's modulus of 316L steel is much larger than those of yield and tensile strengths, that is, 4.6 % of the mean value for Young's modulus, while 1.4 % and 1.6 % of the mean values for yield and for tensile strengths, respectively. Therefore, an international Round Robin test on Young's modulus of two austenitic stainless steels at cryogenic temperatures under the participation often institutes from four nations has been initiated within these two years. As a result, the ratios of standard deviation to the mean values are 4.2 % for 304L and 3.6 % for 316L. Such a drop in the standard deviation is attributable to the decrease in the number of institute owing to the application of single extensometer or direct strain gage technique.

  11. The Impact of the Massive Young Star GL 2591 on its Circumstellar Material: Temperature, Density and Velocity Structure

    E-Print Network [OSTI]

    Floris F. S. van der Tak; Ewine F. van Dishoeck; Neal J. Evans II; Eric J. Bakker; Geoffrey A. Blake

    1999-05-05T23:59:59.000Z

    The temperature, density and kinematics of the gas and dust surrounding the luminous young stellar object GL~2591 are investigated on scales as small as 100 AU, probed by 4.7 micron absorption spectroscopy, to over 60,000 AU, probed by single-dish submillimeter spectroscopy. These two scales are connected by interferometric 86-226 GHz images of size 60,000 AU and resolution 2000 AU in continuum and molecular lines. The data are used to constrain the physical structure of the envelope and investigate the influence of the young star on its immediate surroundings.

  12. Temperature dependence of dynamic Young's modulus and internal friction in three plasma sprayed NiCrAlY coating alloys

    E-Print Network [OSTI]

    Cook, Lloyd Steven

    1989-01-01T23:59:59.000Z

    TEMPERATURE DEPENDENCE OF DYNAM'IIC YOUNG'S MODULUS AND INTERNAL FRICTION IN THREE PLASMA SPRAYED NiCrAlY COATING -ALLOYS A Thesis LLOYD STEVEN COOK Submitted to the 08ice of Graduate Studies of Texas AE M University in part. al full...'illment of the requirement for the degree of MASTER OF SCIENCE August 1989 Itiajor Subject: l'dechanical Engineering TEMPERATURE DEPENDENCE OF DYNAMIC YOUNG'S MODULUS AND INTERNAL FRICTION IN THREE PLASMA SPRAYED NiCrAIY COATING ALLOYS A Thesis by LLOYD STEVEN COOK...

  13. JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES, VOL. 118, 10,41410,431, doi:10.1002/jgrd.50808, 2013 Exploring the faint young Sun problem and the possible climates

    E-Print Network [OSTI]

    Spiga, Aymeric

    Exploring the faint young Sun problem and the possible climates of the Archean Earth with a 3-D GCM B solutions have been proposed to solve the "faint young Sun problem," defined by the fact that the Earth was not fully frozen during the Archean despite the fainter Sun. Most previous studies were performed

  14. JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES, VOL. 118, 118, doi:10.1002/jgrd.50808, 2013 Exploring the faint young Sun problem and the possible climates

    E-Print Network [OSTI]

    Codron, Francis

    Exploring the faint young Sun problem and the possible climates of the Archean Earth with a 3-D GCM B to solve the "faint young Sun problem," defined by the fact that the Earth was not fully frozen during the Archean despite the fainter Sun. Most previous studies were performed with simple 1-D radiative convective

  15. Ruminal and post-ruminal digestion of starch from 2 types of concentrates in the young calf during and after weaning

    E-Print Network [OSTI]

    Boyer, Edmond

    Ruminal and post-ruminal digestion of starch from 2 types of concentrates in the young calf during de la digestion, 63122 Saint-Genès-Champanelle, France Abrupt weaning of young calves from milk to concentrate led to rapid development of rumen and starch digestion (Leibholz, 1978). We report data obtained

  16. Ritter, F. E., & Young, R. M. (Eds.). (1998). Proceedings of the Second European Conference on Cognitive Modelling. Thrumpton (UK): Nottingham University Press. ISBN 1-897676-67-0

    E-Print Network [OSTI]

    Ritter, Frank

    Ritter, F. E., & Young, R. M. (Eds.). (1998). Proceedings of the Second European Conference., & Young, R. M. (Eds.). (1998). Proceedings of the Second European Conference on Cognitive Modelling.). (1998). Proceedings of the Second European Conference on Cognitive Modelling. Thrumpton (UK): Nottingham

  17. 4-H Meat Project Helper's Guide Congratulations! You have been asked to be a 4-H Meat Project Helper by a young person interested in understanding

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Meat #12;4-H Meat Project Helper's Guide Congratulations! You have been asked to be a 4-H Meat-being. It is your job to guide the young person through the experiences outlined in this activity guide.The young, creative thinking, and communication. The 4-H Meat Project This activity guide centers on meat

  18. III) New young stars in the CO Cepheus void !!Selecting an appropriate sample of targets is the major difficulty for searching other co-moving young stars in this sky area. We

    E-Print Network [OSTI]

    Complutense de Madrid, Universidad

    is the major difficulty for searching other co-moving young stars in this sky area. We picked optical-ray luminous ­ LX > 1030 erg s!1 and iv) within 170 pc of the Sun. !!Our first intermediate- and high. 2006, A&A, 460, 695; Torres, et al. 2008, Handbook of Star Forming Regions, Volume II, The Southern Sky

  19. Young Stellar Clusters with a Schuster Mass Distribution - I: Stationary Winds

    E-Print Network [OSTI]

    Palous, Jan; Martinez-Gonzalez, Sergio; Hueyotl-Zahuantitla, Filiberto; Silich, Sergiy; Tenorio-Tagle, Guillermo

    2013-01-01T23:59:59.000Z

    Hydrodynamic models for spherically-symmetric winds driven by young stellar clusters with a generalized Schuster stellar density profile are explored. For this we use both semi-analytic models and 1D numerical simulations. We determine the properties of quasi-adiabatic and radiative stationary winds and define the radius at which the flow turns from subsonic into supersonic for all stellar density distributions. Strongly radiative winds diminish significantly their terminal speed and thus their mechanical luminosity is strongly reduced. This also reduces their potential negative feedback into their host galaxy ISM. The critical luminosity above which radiative cooling becomes dominant within the clusters, leading to thermal instabilities which make the winds non-stationary, is determined, and its dependence on the star cluster density profile, core radius and half mass radius is discussed.

  20. Out of equilibrium GigaPa Young modulus of water nanobridge probed by Force Feedback Microscopy

    E-Print Network [OSTI]

    Simon Carpentier; Mario S. Rodrigues; Luca Costa; Miguel V. Vitorino; Elisabeth Charlaix; Joel Chevrier

    2015-03-18T23:59:59.000Z

    Because of capillary condensation, water droplets appear in nano/micropores. The large associated surface interactions can deeply influence macroscopic properties as in granular media. We report that dynamical properties of such nanobridge dramatically change when probed at different time scales. Using a novel AFM mode, the Force Feedback Microscopy, the gap between the nanotip and the surface is continuously varied, and we observe this change in the simultaneous measurements, at different frequencies, of the stiffness G'(N/m), the dissipative coefficient G"(kg/sec) together with the static force. As the measuring time approaches the microsecond, the liquid droplet exhibits a large positive stiffness (it is small and negative in the long time limit). Although clearly controlled by surface effects, it compares to the stiffness of a solid nanobridge with a 1 GigaPa Young modulus. We argue that as evaporation and condensation gradually lose efficiency, the contact line progressively becomes immobile, which explains this behavior.

  1. The Origin of the Galactic Center Nonthermal Radio Filaments: Young Stellar Clusters

    E-Print Network [OSTI]

    F. Yusef-Zadeh

    2003-08-01T23:59:59.000Z

    The unusual class of magnetized nonthermal radio filaments (NTF), threads and streaks with their unique physical characteristics are found only within the inner couple of degrees of the Galactic center. Also, a number of young, mass-losing and rare stellar clusters are recognized to lie in the Galactic center region. The latter characteristic of the Galactic center region is used to explain the origin of the nonthermal radio filaments. We consider a mechanism in which the collective winds of massive WR and OB stars within a dense stellar environment produce shock waves that can accelerate particles to relativistic energies. This mechanism is an extension of a model originally proposed by Rosner and Bodo (1996), who suggested that energetic nonthermal particles are produced in a terminal shock of mass-losing stars. The large-scale distribution of the magnetic field in the context of this model is argued to have neither poloidal geometry nor pervasive throughout the Galactic center region.

  2. The Faint Young Sun Paradox in the Context of Modern Cosmology

    E-Print Network [OSTI]

    Dumin, Yurii V

    2015-01-01T23:59:59.000Z

    The Faint Young Sun Paradox comes from the fact that solar luminosity (2-4)x10^9 years ago was insufficient to support the Earth's temperature necessary for the efficient development of geological and biological evolution (particularly, for the existence of considerable volumes of liquid water). It remains unclear by now if the so-called greenhouse effect on the Earth can resolve this problem. An interesting alternative explanation was put forward recently by M.Krizek (New Ast. 2012, 17, 1), who suggested that planetary orbits expand with time due to the local Hubble effect, caused by the uniformly-distributed Dark Energy. Then, under a reasonable value of the local Hubble constant, it is easy to explain why the Earth was receiving an approximately constant amount of solar irradiation for a long period in the past and will continue to do so for a quite long time in future.

  3. Out of equilibrium GigaPa Young modulus of water nanobridge probed by Force Feedback Microscopy

    E-Print Network [OSTI]

    Carpentier, Simon; Costa, Luca; Vitorino, Miguel V; Charlaix, Elisabeth; Chevrier, Joel

    2015-01-01T23:59:59.000Z

    Because of capillary condensation, water droplets appear in nano/micropores. The large associated surface interactions can deeply influence macroscopic properties as in granular media. We report that dynamical properties of such nanobridge dramatically change when probed at different time scales. Using a novel AFM mode, the Force Feedback Microscopy, the gap between the nanotip and the surface is continuously varied, and we observe this change in the simultaneous measurements, at different frequencies, of the stiffness G'(N/m), the dissipative coefficient G"(kg/sec) together with the static force. As the measuring time approaches the microsecond, the liquid droplet exhibits a large positive stiffness (it is small and negative in the long time limit). Although clearly controlled by surface effects, it compares to the stiffness of a solid nanobridge with a 1 GigaPa Young modulus. We argue that as evaporation and condensation gradually lose efficiency, the contact line progressively becomes immobile, which expla...

  4. Young massive star clusters in nearby galaxies. I. Identification and general properties of cluster systems

    E-Print Network [OSTI]

    Soeren S. Larsen; Tom Richtler

    1999-02-19T23:59:59.000Z

    Using ground-based UBVRI+Halpha CCD photometry we have been carrying out a search for young massive star clusters (YMCs) in a sample consisting of 21 nearby spiral galaxies. We find a large variety concerning the richness of the cluster systems, with some galaxies containing no YMCs at all and others hosting very large numbers of YMCs. Examples of galaxies with poor cluster systems are NGC 300 and NGC 4395, while the richest cluster systems are found in the galaxies NGC 5236, NGC 2997 and NGC 1313. The age distributions of clusters in these galaxies show no obvious peaks, indicating that massive star clusters are formed as an ongoing process rather than in bursts. This is in contrast to what is observed in starbursts and merger galaxies. The radial distributions of clusters follow the Halpha surface brightness. For the galaxies in our sample there is no correlation between the morphological type and the presence of YMCs

  5. SiO Outflow Signatures Toward Massive Young Stellar Objects with Linearly Distributed Methanol Masers

    E-Print Network [OSTI]

    J. M. De Buizer; R. O. Redman; S. N. Longmore; J. Caswell; P. A. Feldman

    2008-10-27T23:59:59.000Z

    Methanol masers are often found in linear distributions, and it has been hypothesized that these masers are tracing circumstellar accretion disks around young massive stars. However, recent observations in H2 emission have shown what appear to be outflows at similar angles to the maser distribution angles, not perpendicular as expected in the maser-disk scenario. The main motivation behind the observations presented here is to determine from the presence and morphology of an independent outflow tracer, namely SiO, if there are indeed outflows present in these regions and if they are consistent or inconsistent with the maser-disk hypothesis. For ten sources with H2 emission we obtained JCMT single dish SiO (6-5) observations to search for the presence of this outflow indicator. We followed up those observations with ATCA interferometric mapping of the SiO emission in the (2-1) line in six sources. The JCMT observations yielded a detection in the SiO (6-5) line in nine of the ten sources. All of the sources with bright SiO lines display broad line wings indicative of outflow. A subset of the sources observed with the JCMT have methanol maser velocities significantly offset from their parent cloud velocities, supporting the idea that the masers in these sources are likely not associated with circumstellar disks. The ATCA maps of the SiO emission show five of the six sources do indeed have SiO outflows. The spatial orientations of the outflows are not consistent with the methanol masers delineating disk orientations. Overall, the observations presented here seem to provide further evidence against the hypothesis that linearly distributed methanol masers generally trace the orientations of circumstellar disks around massive young stars.

  6. ORIGIN OF THE UNUSUALLY LOW NITROGEN ABUNDANCES IN YOUNG POPULATIONS OF THE LARGE MAGELLANIC CLOUD

    SciTech Connect (OSTI)

    Bekki, Kenji [ICRAR, M468, University of Western Australia, 35 Stirling Highway, Crawley Western Australia 6009 (Australia); Tsujimoto, Takuji [National Astronomical Observatory, Mitaka-shi, Tokyo 181-8588 (Japan)

    2010-10-01T23:59:59.000Z

    It is a longstanding problem that H II regions and very young stellar populations in the Large Magellanic Cloud (LMC) have nitrogen abundances ([N/H]) that are a factor of {approx}7 lower than the solar value. We here discuss a new scenario in which the observed unusually low nitrogen abundances can be closely associated with recent collisions and subsequent accretion of H I high velocity clouds (HVCs) that surround the Galaxy and have low nitrogen abundances. We show that if the observed low [N/H] is limited to very young stars with ages less than {approx}10{sup 7} yr, then the collision/accretion rate of the HVCs onto the LMC needs to be {approx}0.2 M{sub sun} yr{sup -1} (corresponding to the total HVC mass of 10{sup 6}-10{sup 7} M{sub sun}) to dilute the original interstellar medium (ISM) before star formation. The required accretion rate means that even if the typical mass of HVCs accreted onto the LMC is {approx}10{sup 7} M{sub sun}, the Galaxy needs to have {approx}2500 massive HVCs within the LMC's orbital radius with respect to the Galactic center. The rather large number of required massive HVCs drives us to suggest that the HVCs are not likely to efficiently dilute the ISM of the LMC and consequently lower the [N/H]. We thus suggest the transfer of gas with low [N/H] from the Small Magellanic Cloud to the LMC as a promising scenario that can explain the observed low [N/H].

  7. The Annals of the American Academy of Political and Social Science Young Disadvantaged Men: Fathers, Families, Poverty, and Policy

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    : Fathers, Families, Poverty, and Policy Vol. 635, May 2011 Timothy M. Smeeding, Irwin Garfinkel, and Ronald B. Mincy, Special Editors Introduction: Young Disadvantaged Men: Fathers, Families, Poverty to obtain full-time work. In 2008, the poverty line for a family of three was $17,400. Far less than half

  8. Balancing Performance, Energy, and Quality in Pervasive Computing Jason Flinn, SoYoung Park, and M. Satyanarayanan

    E-Print Network [OSTI]

    Satyanarayanan, Mahadev "Satya"

    Balancing Performance, Energy, and Quality in Pervasive Computing Jason Flinn, SoYoung Park, and M is self-tuning: it monitors both application resource usage and the availability of resources this determination, Spectra balances the competing goals of performance, energy conservation, and application quality

  9. Balancing Performance, Energy, and Quality in Pervasive Computing Jason Flinn +# , SoYoung Park + , and M. Satyanarayanan +#

    E-Print Network [OSTI]

    Flinn, Jason

    Balancing Performance, Energy, and Quality in Pervasive Computing Jason Flinn +# , SoYoung Park compute servers. Spectra is self­tuning: it monitors both application resource usage and the availability. In making this determination, Spectra balances the competing goals of performance, energy conservation

  10. Why young birds forage at nutritionally poor and dangerous places: classical food-safety trade-offs

    E-Print Network [OSTI]

    Sandercock, Brett K.

    205 205 Why young birds forage at nutritionally poor and dangerous places: classical food in the context of energy state. Animals in low energy states tend to accept the highest danger levels in return classes of birds in habitats that differ in predation danger, food densities, and substrate complexity we

  11. Energy Content of Young Alewives in Eastern Lake Michigan and Muskegon Lake, a Connected Drowned River Mouth Lake

    E-Print Network [OSTI]

    of an individual fish's condition and a key input variable for bioenergetics applications. Energy content of young appropriate energy measures for bioenergetics applications to inform fisheries management. Energy content) is an important input variable for the application of bioenergetics models (Hanson et al. 1997), and predictions

  12. Origin of young EAS with E[sub 0]=1--10 PeV at the mountain level

    SciTech Connect (OSTI)

    Adamov, D.S.; Danilova, T.V.; Erlykin, A.D. (P. N. Lebedev Physical Institute, Moscow (Russian Federation))

    1993-06-15T23:59:59.000Z

    It is shown, that the appearance of young showers with the high concentration of electromagnetic (e.m.) energy in cores of EAS with E[sub 0]=1--10 PeV at the mountain level, different slopes of EAS size and e.m. energy spectra and the rise of [epsilon][sub [ital e][gamma

  13. Marnie (1964) Margaret "Marnie" Edgar (Hedren) is a troubled young woman who has an unnatural fear and

    E-Print Network [OSTI]

    Schenato, Luca

    1964-01-01T23:59:59.000Z

    Marnie (1964) Margaret "Marnie" Edgar (Hedren) is a troubled young woman who has an unnatural fear wants to try to make her marriage work. Cast Tippi Hedren as Marnie Edgar (as 'Tippi' Hedren Louise Latham as Bernice Edgar Bob Sweeney as Cousin Bob Milton Selzer as Man at Track

  14. Sources of Hens Though it's sometimes possible to buy five-month old pullets (young hens) that are ready to

    E-Print Network [OSTI]

    New Hampshire, University of

    Sources of Hens Though it's sometimes possible to buy five-month old pullets (young hens the old pure breeds such as Rhode Island Reds, Barred Rocks or New Hampshires. Expected Results Ten hens dozen eggs or more and eat 90-100 pounds of feed during the same time. Housing Mature laying hens should

  15. Automated fungal DNA sequence comparison Dylan Glotzer `11, Anders Ohman `10, Darcy Young '11 Faculty Sponsor: David Hibbett

    E-Print Network [OSTI]

    Hibbett, David S.

    Automated fungal DNA sequence comparison Dylan Glotzer `11¹, Anders Ohman `10¹, Darcy Young '11 sequences were downloaded from the NCBI's GenBank, which is a database of publicly available DNA sequences. These sequences were categorized as "environmental" or "specimen-based" submissions based on a number of keywords

  16. However, the years that I spent in Egypt as a child and young adult blessed me with a solid foundation

    E-Print Network [OSTI]

    Zewail, Ahmed

    #12;However, the years that I spent in Egypt as a child and young adult blessed me with a solid of the world that often left me distressed. Many thought 1rode camels all day long in Egypt. The truth is that 1had never ridden a camel in Egypt. Many also imagined that most of my fellow Egyptians drilled

  17. The fate of ultrahigh energy nuclei in the immediate environment of young fast-rotating pulsars

    E-Print Network [OSTI]

    Kotera, Kumiko; Blasi, Pasquale

    2015-01-01T23:59:59.000Z

    Young, fast-rotating neutron stars are promising candidate sources for the production of ultrahigh energy cosmic rays (UHECRs). The interest in this model has recently been boosted by the latest chemical composition measurements of cosmic rays, that seem to show the presence of a heavy nuclear component at the highest energies. Neutrons stars, with their metal-rich surfaces, are potentially interesting sources of such nuclei, but some open issues remain: 1) is it possible to extract these nuclei from the star's surface? 2) Do the nuclei survive the severe conditions present in the magnetosphere of the neutron star? 3) What happens to the surviving nuclei once they enter the wind that is launched outside the light cylinder? In this paper we address these issues in a quantitative way, proving that for the most reasonable range of neutron star surface temperatures ($T<10^7\\,$K), a large fraction of heavy nuclei survive photo-disintegration losses. These processes, together with curvature losses and accelerati...

  18. Spectroscopic detection of Carbon Monoxide in the Young Supernova Remnant Cassiopeia A

    E-Print Network [OSTI]

    Rho, Jeonghee; Cami, Jan; Reach, William

    2012-01-01T23:59:59.000Z

    We report the detection of carbon monoxide (CO) emission from the young supernova remnant Cassiopeia A (Cas A) at wavelengths corresponding to the fundamental vibrational mode at 4.65 micron. We obtained AKARI Infrared Camera spectra towards 4 positions which unambiguously reveal the broad characteristic CO ro-vibrational band profile. The observed positions include unshocked ejecta at the center, indicating that CO molecules form in the ejecta at an early phase. We extracted a dozen spectra across Cas A along the long 1 arcmin slits, and compared these to simple CO emission models in Local Thermodynamic Equilibrium to obtain first-order estimates of the excitation temperatures and CO masses involved. Our observations suggest that significant amounts of carbon may have been locked up in CO since the explosion 330 years ago. Surprisingly, CO has not been efficiently destroyed by reactions with ionized He or the energetic electrons created by the decay of the radiative nuclei. Our CO detection thus implies that...

  19. Iron Fluorescent Line Emission from Young Stellar Objects in the Orion Nebula

    E-Print Network [OSTI]

    M. Tsujimoto; E. D. Feigelson; N. Grosso; G. Micela; Y. Tsuboi; F. Favata; H. Shang; J. H. Kastner

    2004-12-25T23:59:59.000Z

    We present the result of a systematic search for the iron Kalpha fluorescent line at 6.4 keV among 1616 X-ray sources detected by ultra-deep Chandra observations of the Orion Nebula Cluster and the obscured Orion Molecular Cloud 1 population as part of the Chandra Orion Ultra-deep Project (COUP). Seven sources are identified to have an excess emission at 6.4 keV among 127 control sample sources with significant counts in the 6.0-9.0 keV band. These seven sources are young stellar objects (YSOs) characterized by intense flare-like flux variations, thermal spectra, and near-infrared (NIR) counterparts. The observed equivalent widths of the line cannot be attributed to the fluorescence by interstellar or circumstellar matter along the line of sight. The X-ray spectral fits and NIR colors of the 6.4 keV sources show that these sources have X-ray absorption of > 1x10^22 cm^(-2) and NIR excess emission, which is not expected when the fluorescence occurs at the stellar photosphere. We therefore conclude that the iron fluorescent line of YSOs arises from reflection off of circumstellar disks, which are irradiated by the hard X-ray continuum emission of magnetic reconnection flares.

  20. Young Stars in the Camelopardalis Dust and Molecular Clouds. II. Infrared Objects

    E-Print Network [OSTI]

    V. Straizys; V. Laugalys

    2008-03-17T23:59:59.000Z

    Using infrared photometric data extracted from the 2MASS, IRAS and MSX databases, 142 suspected young stellar objects (YSOs) are selected from about 2 million stars in the Camelopardalis segment of the Milky Way limited by Galactic longitude 132-158 deg, latitude pm 12 deg. According to radial velocities of the associated CO clouds, the objects are attributed to three molecular and dust cloud layers at 150--300 pc, 900 pc and 2.2 kpc distances from the Sun. These objects concentrate into dust and molecular clouds and exhibit extremely large reddenings (A_V up to 25 mag) which can be caused by the dust in foreground clouds and circumstellar envelopes or disks. In the J-H vs. H-K diagram these objects lie above the intrinsic line of T Tauri variables, roughly along the black-body line. Among the identified objects, some already known YSOs are present, including the well investigated massive object GL 490. The spectral energy distributions between 700 nm and 100 mum suggest that the objects may be YSOs of classes I, II and III. However, we do not exclude the possibility that a small fraction of the objects, especially those without IRAS and MSX photometry, may be unrecognized heavily reddened OB-stars, late-type AGB stars or even galaxies.

  1. Young Stars in the Camelopardalis Dust and Molecular Clouds. I. The Cam OB1 Association

    E-Print Network [OSTI]

    V. Straizys; V. Laugalys

    2008-03-31T23:59:59.000Z

    The distribution of dust and molecular clouds in the direction of Galactic longitudes 132--158 deg and latitudes pm 12 deg is investigated. The maps of dust distribution in the area were plotted from the following surveys: the star counts in the DSS I database by Dobashi et al. (2005), the survey of the average infrared color excesses by Froebrich et al. (2007) and the thermal dust emission survey at 100 micrometers by Schlegel et al. (1998). The distribution of molecular clouds was taken from the whole sky CO survey by Dame et al. (2001). All these surveys show very similar cloud patterns in the area. Using the radial velocities of CO, the distances to separate clouds are estimated. A revised list of the Cam OB1 association members contains 43 stars and the open cluster NGC 1502. 18 young irregular variable and H alpha emission stars are identified in the area. All this proves that the star forming process in the Camelopardalis clouds is still in progress.

  2. An Optical Survey of the Partially Embedded Young Cluster in NGC 7129

    E-Print Network [OSTI]

    Dahm, S E

    2015-01-01T23:59:59.000Z

    NGC 7129 is a bright reflection nebula located in the molecular cloud complex near l=105.4, b=+9.9, about 1.15 kpc distant. Embedded within the reflection nebula is a young cluster dominated by a compact grouping of four early-type stars: BD+65 1638 (B3V), BD+65 1637 (B3e), SVS 13 (B5e), and LkH-alpha 234 (B8e). About 80 H-alpha emission sources brighter than V~23 are identified in the region, many of which are presumably T Tauri star members of the cluster. We also present deep (V~23), optical (VRI) photometry of a field centered on the reflection nebula and spectral types for more than 130 sources determined from low dispersion, optical spectroscopy. The narrow pre-main sequence evident in the color-magnitude diagram suggests that star formation was rapid and coeval. A median age of about 1.8 Myr is inferred for the H-alpha and literature-identified X-ray emission sources having established spectral types, using pre-main sequence evolutionary models. Our interpretation of the structure of the molecular clou...

  3. Complex organic molecules in organic-poor massive young stellar objects

    E-Print Network [OSTI]

    Fayolle, Edith C; Garrod, Robin T; van Dishoeck, Ewine F; Bisschop, Suzanne E

    2015-01-01T23:59:59.000Z

    Massive young stellar objects (MYSOs) with hot cores are classic sources of complex organic molecules. The origins of these molecules in such sources, as well as the small- and large-scale differentiation between nitrogen- and oxygen-bearing complex species, are poorly understood. We aim to use complex molecule abundances toward a chemically less explored class of MYSOs with weak hot organic emission lines to constrain the impact of hot molecular cores and initial ice conditions on the chemical composition toward MYSOs. We use the IRAM 30m and the Submillimeter Array to search for complex organic molecules over 8-16 GHz in the 1~mm atmospheric window toward three MYSOs with known ice abundances, but without luminous molecular hot cores. Complex molecules are detected toward all three sources at comparable abundances with respect to CH$_3$OH to classical hot core sources. The relative importance of CH$_3$CHO, CH$_3$CCH, CH$_3$OCH$_3$, CH$_3$CN, and HNCO differ between the organic-poor MYSOs and hot cores, howe...

  4. Successful Field-Scale In Situ Thermal NAPL Remediation at the Young-Rainey Star Center

    SciTech Connect (OSTI)

    Gavaskar, A.R. [ed.; Chen, A.S.C. [ed.; none,

    2004-05-04T23:59:59.000Z

    The U.S. Department of Energy (DOE) successfully completed a fieldscale remediation to remove non-aqueous phase liquids (NAPLs) from the subsurface at a site on the Young-Rainey Science, Technology, and Research (STAR) Center, Largo, Florida. The STAR Center is a former DOE facility. The remediation project covered an area of 930 m2 (10,000 ft2) and depths extending to 10.5 m (35 ft) below ground surface. In July 2001, DOE’s contractor awarded a subcontract to SteamTech Environmental Services for removal of NAPLs from a portion of the Northeast Site. The technologies used for remediation were steam-enhanced extraction and Electro-Thermal Dynamic Stripping Process, an electrical resistive heating technology. McMillan-McGee Corporation implemented the process. Construction of the remediation system was completed in September 2002. Operations began immediately after construction, and active heating ended in February 2003. After operations were completed, confirmatory sampling was conducted over a 6-month period to verify the level of cleanup achieved. Results of the sampling showed that NAPL concentrations were reduced significantly below the required cleanup goals and, in most cases, below the regulatory maximum contaminant levels. Lessons learned relative to the design, construction, operation, confirmatory sampling approach, and subcontracting could benefit managers of similar remediation projects

  5. THE SOLAR ENERGETIC BALANCE REVISITED BY YOUNG SOLAR ANALOGS, HELIOSEISMOLOGY, AND NEUTRINOS

    SciTech Connect (OSTI)

    Turck-Chieze, Sylvaine; Piau, Laurent [CEA/DSM/IRFU/Service d'Astrophysique, CE Saclay, 91191 Gif-sur-Yvette (France); Couvidat, Sebastien, E-mail: Sylvaine.Turck-Chieze@cea.fr, E-mail: Laurent.Piau@cea.fr, E-mail: Couvidat@stanford.edu [HEPL, Stanford University, Stanford, CA 94305 (United States)

    2011-04-20T23:59:59.000Z

    The energetic balance of the standard solar model (SSM) results from equilibrium between nuclear energy production, energy transfer, and photospheric emission. In this Letter, we give an order of magnitude of several percent for the loss of energy in kinetic energy, magnetic energy, and X-ray or UV radiation during the entire solar lifetime from the observations of the present Sun. We also estimate the loss of mass from the observations of young solar analogs, which could reach up to 30%. We deduce new models of the present Sun, their associated neutrino fluxes, and internal sound-speed profile. This approach sheds quantitative lights on the disagreement between the sound speed obtained by helioseismology and the sound speed derived from the SSM including the updated photospheric CNO abundances, based on recent observations. We conclude that about 20% of the present discrepancy could come from the incorrect description of the early phases of the Sun, its activity, its initial mass, and mass-loss history. This study has obvious consequences on the solar system formation and the early evolution of the closest planets.

  6. Magnetic field measurements at milliarcsecond resolution around massive young stellar objects

    E-Print Network [OSTI]

    Surcis, G; van Langevelde, H J; Kramer, B Hutawarakorn; Bartkiewicz, A; Engelkamp, H

    2015-01-01T23:59:59.000Z

    Magnetic fields have only recently been included in theoretical simulations of high-mass star formation. The simulations show that magnetic fields can play a crucial role not only in the formation and dynamics of molecular outflows, but also in the evolution of circumstellar disks. Therefore, new measurements of magnetic fields at milliarcsecond resolution close to massive young stellar objects (YSOs) are fundamental for providing new input for numerical simulations and for understanding the formation process of massive stars. The polarized emission of 6.7 GHz CH3OH masers allows us to investigate the magnetic field close to the massive YSO where the outflows and disks are formed. Recently, we have detected with the EVN CH3OH maser polarized emission towards 10 massive YSOs. From a first statistical analysis we have found evidence that magnetic fields are primarily oriented along the molecular outflows. To improve our statistics we are carrying on a large observational EVN campaign for a total of 19 sources, ...

  7. Sun-Like Magnetic Cycles in the Rapidly-Rotating Young Solar Analog HD 30495

    E-Print Network [OSTI]

    Egeland, Ricky; Hall, Jeffrey C; Henry, Gregory W

    2015-01-01T23:59:59.000Z

    A growing body of evidence suggests that multiple dynamo mechanisms can drive magnetic variability on different timescales, not only in the Sun but also in other stars. Many solar activity proxies exhibit a quasi-biennial ($\\sim$2 year) variation, which is superimposed upon the dominant 11 year cycle. A well-characterized stellar sample suggests at least two different relationships between rotation period and cycle period, with some stars exhibiting long and short cycles simultaneously. Within this sample, the solar cycle periods are typical of a more rapidly rotating star, implying that the Sun might be in a transitional state or that it has an unusual evolutionary history. In this work, we present new and archival observations of dual magnetic cycles in the young solar analog HD 30495, an $\\sim$1 Gyr-old G1.5V star with a rotation period near 11 days. This star falls squarely on the relationships established by the broader stellar sample, with short-period variations at $\\sim$1.7 years and a long cycle of $...

  8. Dusty supernovae running the thermodynamics of the matter reinserted within young and massive super stellar clusters

    SciTech Connect (OSTI)

    Tenorio-Tagle, Guillermo; Silich, Sergiy; Martínez-González, Sergio [Instituto Nacional de Astrofísica Óptica y Electrónica, AP 51, 72000 Puebla (Mexico); Muñoz-Tuñón, Casiana [Instituto de Astrofísica de Canarias, E-38200 La Laguna, Tenerife (Spain); Palouš, Jan; Wünsch, Richard, E-mail: gtt@inaoep.mx, E-mail: cmt@ll.iac.es [Astronomical Institute, Academy of Sciences of the Czech Republic, Bo?ní II 1401, 141 31 Prague (Czech Republic)

    2013-12-01T23:59:59.000Z

    Following the observational and theoretical evidence that points at core-collapse supernovae (SNe) as major producers of dust, here we calculate the hydrodynamics of the matter reinserted within young and massive super stellar clusters under the assumption of gas and dust radiative cooling. The large SN rate expected in massive clusters allows for a continuous replenishment of dust immersed in the high temperature thermalized reinserted matter and warrants a stationary presence of dust within the cluster volume during the type II SN era. We first show that such a balance determines the range of the dust-to-gas-mass ratio, and thus the dust cooling law. We then search for the critical line that separates stationary cluster winds from the bimodal cases in the cluster mechanical luminosity (or cluster mass) versus cluster size parameter space. In the latter, strong radiative cooling reduces considerably the cluster wind mechanical energy output and affects particularly the cluster central regions, leading to frequent thermal instabilities that diminish the pressure and inhibit the exit of the reinserted matter. Instead, matter accumulates there and is expected to eventually lead to gravitational instabilities and to further stellar formation with the matter reinserted by former massive stars. The main outcome of the calculations is that the critical line is almost two orders of magnitude or more, depending on the assumed value of V {sub A?}, lower than when only gas radiative cooling is applied. And thus, many massive clusters are predicted to enter the bimodal regime.

  9. Targeting Young Stars with Kepler: Planet Formation, Migration Mechanisms and the Early History of Planetary Systems

    E-Print Network [OSTI]

    Lloyd, James P; Mamajek, Eric; Spiegel, David S; Covey, Kevin R; Shkolnik, Evgenya L; Walkowicz, Lucianne; Chavez, Miguel; Bertone, Emanuele; Aguilar, Jose Manuel Olmedo

    2013-01-01T23:59:59.000Z

    This white paper discusses a repurposed mission for the Kepler spacecraft that focusses on solving outstanding problems in planet formation and evolution by targeting the study of the hot Jupiter population of young stars. This mission can solve the question of the mode of migration of hot Jupiters, address the problem of whether Jupiters form by hot-start (gravitational instability) or cold-start (core accretion) mechanisms, and provide a wealth of data on the early stages of planetary system evolution during the active phases of stars which impact planetary habitability. In one year of observations of three weeks dwell time per field, Kepler would increase by more than an order of magnitude the number of known hot Jupiters, which can be followed up with fast cadence observations to to search for transit timing variations and to perform asteroseismological characterization of the host stars. This mission scenario continues to operate Kepler in the photometric monitoring mode for which it was designed, and is...

  10. Evolutionary Stages and Disk Properties of Young Stellar Objects in the Perseus Cloud

    E-Print Network [OSTI]

    Zhang, Hong-Xin; Fang, Min; Yuan, Hai-Bo; Zhao, Yinghe; Chang, Ruixiang; Jiang, Xuejian; Liu, Xiao-Wei; Luo, A-Li; Ma, Hongjun; Shao, Zhengyi; Wang, Xiaolong

    2015-01-01T23:59:59.000Z

    We investigated the evolutionary stages and disk properties of 211 Young stellar objects (YSOs) across the Perseus cloud by modeling the broadband optical to mid-infrared (IR) spectral energy distribution (SED). By exploring the relationships among the turnoff wave bands lambda_turnoff (longward of which significant IR excesses above the stellar photosphere are observed), the excess spectral index alpha_excess at lambda = 5.8 microns, whereas the median fractional dust luminosities L_dust/L_star tend to decrease with lambda_turnoff. This points to an inside-out disk clearing of small dust grains. Moreover, a positive correlation between alpha_excess and R_in was found at alpha_excess > ~0 and R_in > ~10 $\\times$ the dust sublimation radius R_sub, irrespective of lambda_turnoff, L_dust/L_star and disk flaring. This suggests that the outer disk flaring either does not evolve synchronously with the inside-out disk clearing or has little influence on alpha_excess shortward of 24 microns. About 23% of our YSO disk...

  11. Accretion-ejection connection in the young brown dwarf candidate ISO-Cha1 217

    E-Print Network [OSTI]

    Whelan, E T; Bacciotti, F; Nisini, B; Bonito, R; Antoniucci, S; Stelzer, B; Biazzo, K; D'Elia, V; Ray, T P

    2014-01-01T23:59:59.000Z

    As the number of observed brown dwarf outflows is growing it is important to investigate how these outflows compare to the well studied jets from young stellar objects. A key point of comparison is the relationship between outflow and accretion activity and in particular the ratio between the mass outflow and accretion rates ($\\dot{M}_{out}$/$\\dot{M}_{acc}$). The brown dwarf candidate ISO-ChaI 217 was discovered by our group, as part of a spectro-astrometric study of brown dwarfs, to be driving an asymmetric outflow with the blue-shifted lobe having a position angle of $\\sim$ 20$^{\\circ}$. The aim here is to further investigate the properties of ISO-ChaI 217, the morphology and kinematics of its outflow, and to better constrain ($\\dot{M}_{out}$/$\\dot{M}_{acc}$). The outflow is spatially resolved in the $[SII]\\lambda \\lambda 6716,6731$ lines and is detected out to $\\sim$ 1\\farcs6 in the blue-shifted lobe and ~ 1" in the red-shifted lobe. The asymmetry between the two lobes is confirmed although the velocity as...

  12. Time monitoring of radio jets and magnetospheres in the nearby young stellar cluster R Coronae Australis

    SciTech Connect (OSTI)

    Liu, Hauyu Baobab; Takami, Michihiro; Yan, Chi-Hung; Karr, Jennifer; Chou, Mei-Yin; Ho, Paul T.-P. [Academia Sinica Institute of Astronomy and Astrophysics, P.O. Box 23-141, Taipei, 106, Taiwan (China); Galván-Madrid, Roberto; Costigan, Gráinne; Manara, Carlo Felice [European Southern Observatory, Karl-Schwarzschild-Str. 2, D-85748, Garching (Germany); Forbrich, Jan [Department of Astrophysics, University of Vienna, Türkenschanzstraße 17, A-1180, Vienna (Austria); Rodríguez, Luis F. [Centro de Radioastronomía y Astrofísica, UNAM, A.P. 3-72, Xangari, Morelia, 58089 (Mexico); Zhang, Qizhou, E-mail: hyliu@asiaa.sinica.edu.tw [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

    2014-01-10T23:59:59.000Z

    We report Karl G. Jansky Very Large Array 8-10 GHz (? = 3.0-3.7 cm) monitoring observations toward the young stellar object (YSO) cluster R Coronae Australis (R CrA), taken from 2012 March 15 to 2012 September 12. These observations were planned to measure the radio flux variabilities in timescales from 0.5 hr to several days, to tens of days, and up to ?200 days. We found that among the YSOs detectable in individual epochs, in general, the most reddened objects in the Spitzer observations show the highest mean 3.5 cm Stokes I emission, and the lowest fractional variabilities on <200 day timescales. The brightest radio flux emitters in our observations are the two reddest sources IRS7W and IRS7E. In addition, by comparing our observations with observations taken from 1996 to 1998 and 2005, we found that the radio fluxes of these two sources have increased by a factor of ?1.5. The mean 3.5 cm fluxes of the three Class I/II sources, IRSI, IRS2, and IRS6, appear to be correlated with their accretion rates derived by a previous near-infrared line survey. The weakly accreting Class I/II YSOs, or those in later evolutionary stages, present radio flux variability on <0.5 hr timescales. Some YSOs were detected only during occasional flaring events. The source R CrA went below our detection limit during a few fading events.

  13. A radiative-convective equilibrium model to study young giant exoplanets by direct imaging

    E-Print Network [OSTI]

    Baudino, J -L; Boccaletti, A; Bonnefoy, M; Lagrange, A M; Galicher, R

    2015-01-01T23:59:59.000Z

    We developed a model for young giant exoplanets (Exoplanet Radiative-convective Equilibrium Model or Exo-REM). Input parameters are planet's surface gravity (g), effective temperature (Teff ) and elemental composition. Under the additional assumption of thermochemical equilibrium, the model predicts the equilibrium temperature profile and mixing ratio profiles of the most important gases. Opacity sources include the H$_2$-He collision-induced absorption and molecular lines from H$_2$O, CO, CH$_4$ (updated with the Exomol linelist), NH$_3$, VO, TiO, Na and K. Absorption by iron and silicate cloud particles is added above the expected condensation levels with a fixed scale height and a given optical depth at some reference wavelength. Scattering was not included at this stage. We applied Exo-REM to photometric and spectral observations of the planet beta Pictoris b obtained in a series of near IR filters. We derived Teff = 1550 $\\pm$ 150 K, log(g) = 3.5 $\\pm$ 1, and a radius R = 1.76 $\\pm$ 0.24 R Jup (2-$\\sigma...

  14. EFFECT OF DIETARY GLYCOMACROPEPTIDE AND CHOLESTEROL ON CORTICAL GANGLIOSIDE- AND GLYCOPROTEIN-BOUND N-ACETYLNEURAMINIC ACID IN YOUNG RATS

    E-Print Network [OSTI]

    Kary, Susan Ann

    2009-04-29T23:59:59.000Z

    , acylneuraminate pyruvate-lyase, is present in both bacteria and mammals. However, bacteria that express acylneuraminate pyruvate-lyase do not 8 synthesize Neu5Ac, and this enzyme is absent from mammalian tissues that continuously produce sialic acids (18... EFFECT OF DIETARY GLYCOMACROPEPTIDE AND CHOLESTEROL ON CORTICAL GANGLIOSIDE- AND GLYCOPROTEIN-BOUND N- ACETYLNEURAMINIC ACID IN YOUNG RATS by Susan A. Kary B.G.S., University of Kansas, 2006 Submitted to the graduate degree...

  15. Predicting height increment of young-growth red fir in California and southern Oregon. Forest Service research paper (Final)

    SciTech Connect (OSTI)

    Dolph, K.L.

    1992-11-01T23:59:59.000Z

    An equation is given to estimate 10-year height increment for young-growth red fir trees in California and Southern Oregon. The independent variables are the individual tree, stand, and site characteristics significantly related to a tree's height growth. Data used to develop the equation came from stem analysis of 492 trees sampled from 56 stands in the study area. Parameter estimates for the predictive equation were obtained using least-squares linear regression.

  16. Presented by the UT Dallas Career Center UT Dallas Fall Career Expo Days All Majors (non-STEM) Day | Thursday, Sept. 25, 2014

    E-Print Network [OSTI]

    O'Toole, Alice J.

    , and an addition to the Naveen Jindal School of Management that will all open in fall 2014 [Page 5]. In addition helping to create strong infrastruc- ture, a culture of service and an environment of energy. We Updates 17 Audit Compliance 20 Procedure Updates 20 Office of Administration utdallas.edu / administration

  17. Presented by the UT Dallas Career Center UT Dallas Fall Career Expo Days All Majors (non-STEM) Day | Thursday, February 6, 2014

    E-Print Network [OSTI]

    O'Toole, Alice J.

    -time Job Unable to consider Atmos Energy, MDTX Div Financial Assistants, Engineers Accounting, Finance to consider Care Providers Insurance Services Risk Analyst, Underwriting Intern Business Administration, Electrical Engineering, Materials Science and Eng, Software Engineering, Systems Engineering Bachelors

  18. BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey

    E-Print Network [OSTI]

    Gagné, Jonathan; Cruz, Kelle L; Lafrenière, David; Doyon, René; Malo, Lison; Burgasser, Adam J; Naud, Marie-Eve; Artigau, Étienne; Bouchard, Sandie; Gizis, John E; Albert, Loïc

    2015-01-01T23:59:59.000Z

    [Abbreviated] We present the results of a near-infrared (NIR) spectroscopic follow-up survey of 182 M4-L7 low-mass stars and brown dwarfs (BDs) from the BANYAN All-Sky Survey (BASS) for candidate members of nearby, young moving groups (YMGs). We confirm signs of low-gravity for 42 new BD discoveries with estimated masses between 8-75 $M_{Jup}$ and identify previously unrecognized signs of low gravity for 24 known BDs. This allows us to refine the fraction of low-gravity dwarfs in the high-probability BASS sample to $\\sim$82%. We use this unique sample of 66 young BDs, supplemented with 22 young BDs from the literature, to construct new empirical NIR absolute magnitude and color sequences for low-gravity BDs. We obtain a spectroscopic confirmation of low-gravity for 2MASS J14252798-3650229, which is a new $\\sim$27 $M_{Jup}$, L4 $\\gamma$ bona fide member of AB Doradus. We identify a total of 19 new low-gravity candidate members of YMGs with estimated masses below 13 $M_{Jup}$, seven of which have kinematically ...

  19. Spectroscopic characterization of X-ray emitting young stars associated with the Sh 2-296 nebula

    E-Print Network [OSTI]

    Fernandes, B; Montmerle, T; Rojas, G

    2015-01-01T23:59:59.000Z

    We studied a sample of stars associated with the Sh 2-296 nebula, part of the reflection nebulae complex in the region of Canis Major (CMa R1). Our sample corresponds to optical counterparts of X-ray sources detected from observations with the XMM-Newton satellite, which revealed dozens of possible low-mass young stars not yet known in this region. A sample of 58 young star candidates were selected based on optical spectral features, mainly H{\\alpha} and lithium lines, observed with multi-objects spectroscopy performed by the Gemini South telescope. Among the candidates, we find 41 confirmed T Tauri and 15 very likely young stars. Based on the H{\\alpha} emission, the T Tauri stars were distinguished between classical (17%) and weak-lined (83%), but no significant difference was found in the age and mass distribution of these two classes. The characterization of the sample was complemented by near- and mid-infrared data, providing an estimate of ages and masses from the comparison with pre-main-sequence evolut...

  20. The Promises and Pitfalls of Modernity: An Ethnography of Young Catholic Women’s Media Practices for Claiming Cultural Citizenship in Urban India

    E-Print Network [OSTI]

    Doshi, Marissa J

    2014-12-15T23:59:59.000Z

    This dissertation is an ethnography of the media practices of young Catholic women in Mumbai, India. Media practices are conceptualized as cultural practices via which the participants in this study claimed cultural citizenship in order to challenge...

  1. A mixed-methods study of young adults’ receptivity to using Facebook for smoking cessation: If you build it, will they come?

    E-Print Network [OSTI]

    Ramo, Danielle E; Liu, Howard; Prochaska, Judith J

    2013-01-01T23:59:59.000Z

    Development; 2008. AppData. Facebook Apps Leaderboard.use among young people. Facebook for smoking cessationBMC Public Health. 2009;9:32. Facebook for smoking cessation

  2. International Workshop of Young Doctors in Geomechanics -W(H)YDOC 08 Pereira, De Gennaro & Delage (eds) 2008, Ecole des Ponts ParisTech, Champs-sur-Marne

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 Pereira, De Gennaro in geomechanics, Champs-sur- Marne : France (2008)" #12;Figure 2. Interlocking blocks at masonry wall in Peru

  3. International Workshop of Young Doctors in Geomechanics -W(H)YDOC 08 ereira, De Gennaro & Delage (eds) 2008, ENPC, Champs-sur-Marne

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 ereira, De Gennaro in geomechanics, France (2008)" #12;modelled in half, cutting vertically through the tunnel axis. Therefore

  4. Identity Implications of Relationship (Re)Definition Goals: An Analysis of Face Threats and Facework as Young Adults Initiate, Intensify, and Disengage from Romantic Relationships

    E-Print Network [OSTI]

    Kunkel, Adrianne; Wilson, Steven R.; Robson, Scott; Soliz, Jordan; Olufowote, James O.

    2009-01-01T23:59:59.000Z

    Identity implications theory (IIT) is applied to analyze how young adults manage identity concerns associated with the goals of initiating, intensifying, and disengaging from romantic relationships. Participants wrote their ...

  5. 8th World Wide Workshop for Young Environmental Scientists WWW-YES-2008: Urban waters: resource or risks? 13-16 May 2008

    E-Print Network [OSTI]

    Boyer, Edmond

    support systems; sustainable development; developing countries. INTRODUCTION Urban water provision poses prevention, complicate the urban water system's environment. In this context, facing the challenges8th World Wide Workshop for Young Environmental Scientists WWW-YES-2008: Urban waters: resource

  6. Determination of the dynamic Young's modulus, shear modulus, and internal friction as a function of temperature and microstructure in Uranium - 2.4wt% Niobium 

    E-Print Network [OSTI]

    Chancellor, Wayne Morrow

    1988-01-01T23:59:59.000Z

    DETERMINATION OF THE DYNAMIC YOUNG'S MODULUS, SHEAR MODULUS AND INTERNAL FRICTION AS A FUNCTION OF TEMPERATURE AND MICROSTRUCTURE IN URANIUM ? 2. 4vtXNIOBIUM A Thesis by WAYNE MORROW CHANCELLOR Submitted to the Graduate College of Texas A...&M University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE August 1988 Major Subject: Mechanical Engineering DETERMINATION OF THE DYNAMIC YOUNG'S MODULUS, SHEAR MODULUS AND INTERNAL FRICTION AS A FUNCTION OF TEMPERATURE...

  7. Determination of Young's modulus and mechanical damping as a function of temperature for depleted uranium-0.75 wt% titanium using the PUCOT

    E-Print Network [OSTI]

    Keene, Keith Howard

    1986-01-01T23:59:59.000Z

    DETERMINATION OF YOUNG'S MODULUS AND MECHANICAL DAMPING AS A FUNCTION OF TEMPERATURE FOR DEPLETED URANIUM-0. 75 WT% TITANIUM USING THE PUCOT A Thesis bY KEITH HOWARD KEENE Submitted to the Graduate College of Texas A&M University in partial... fulfillment of requirements for the degree of MASTER OF SCIENCE May 1986 Major Subject: Mechanical Engineerinq DETERMINATION OF YOUNG'S MODULUS AND MECHANICAL DAMPING AS A FUNCTION OF TEMPERATURE FOR DEPLETED URANIUM-0. 75 WT% TITANIUM USING THE PUCOT A...

  8. New Mexican politics: a study of territorial delegates

    E-Print Network [OSTI]

    Young, Terry Alan

    1978-01-01T23:59:59.000Z

    NEW MEXICAN POLITICS: A STUDY OF TERRITORIAL DELEGATES A Thesis by TERRY ALAN YOUNG Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF ARTS December 1978 Major..., who care- fully d1rected my course of study. Thanks is also extended to the members of my committee: Dr. R. J. D. Adams, Dr. Garland Bayliss, and Dr. M. E. Benton. Thanks also goes to Congressman Bill Archer of the Seventh Congress1onal District...

  9. YOUNG STELLAR OBJECTS IN LYNDS 1641: DISKS, ACCRETION, AND STAR FORMATION HISTORY

    SciTech Connect (OSTI)

    Fang Min [Purple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, 2 West Beijing Road, 210008 Nanjing (China); Kim, Jinyoung Serena; Flaherty, Kevin [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721-0065 (United States); Van Boekel, Roy; Henning, Thomas [Max-Planck Institute for Astronomy, Koenigstuhl 17, D-69117 Heidelberg (Germany); Sicilia-Aguilar, Aurora, E-mail: mfang@pmo.ac.cn [Departamento de Fisica Teorica, Facultad de Ciencias, Universidad Autonoma de Madrid, 28049 Cantoblanco, Madrid (Spain)

    2013-07-01T23:59:59.000Z

    We investigate the young stellar objects (YSOs) in the Lynds 1641 (L1641) cloud using multi-wavelength data including Spitzer, WISE, the Two Micron All Sky Survey, and XMM covering {approx}1390 YSOs across a range of evolutionary stages. In addition, we targeted a sub-sample of YSOs for optical spectroscopy with the MMT/Hectospec and the MMT/Hectochelle. We use these data, along with archival photometric data, to derive spectral types, extinction values, masses, ages, and accretion rates. We obtain a disk fraction of {approx}50% in L1641. The disk frequency is almost constant as a function of stellar mass with a slight peak at log (M{sub *}/M{sub Sun }) Almost-Equal-To -0.25. The analysis of multi-epoch spectroscopic data indicates that the accretion variability of YSOs cannot explain the two orders of magnitude of scatter for YSOs with similar masses. Forty-six new transition disk (TD) objects are confirmed in this work, and we find that the fraction of accreting TDs is lower than for optically thick disks (40%-45% versus 77%-79%, respectively). We confirm our previous result that the accreting TDs have a median accretion rate similar to normal optically thick disks. We confirm that two star formation modes (isolated versus clustered) exist in L1641. We find that the diskless YSOs are statistically older than the YSOs with optically thick disks and the TD objects have a median age that is intermediate between those of the other two populations. We tentatively study the star formation history in L1641 based on the age distribution and find that star formation started to be active 2-3 Myr ago.

  10. OPTICAL PHOTOMETRIC GTC/OSIRIS OBSERVATIONS OF THE YOUNG MASSIVE ASSOCIATION CYGNUS OB2

    SciTech Connect (OSTI)

    Guarcello, M. G.; Wright, N. J.; Drake, J. J.; Aldcroft, T.; Kashyap, V. L. [Smithsonian Astrophysical Observatory, MS-67, 60 Garden Street, Cambridge, MA 02138 (United States); Garcia-Alvarez, D. [Instituto de Astrofisica de Canarias, E-38205 La Laguna, Tenerife (Spain); Drew, J. E. [CAR/STRI, University of Hertfordshire, College Lane, Hatfield, AL10 9AB (United Kingdom)

    2012-10-15T23:59:59.000Z

    In order to fully understand the gravitational collapse of molecular clouds, the star formation process, and the evolution of circumstellar disks, these phenomena must be studied in different Galactic environments with a range of stellar contents and positions in the Galaxy. The young massive association Cygnus OB2, in the Cygnus-X region, is a unique target to study how star formation and the evolution of circumstellar disks proceed in the presence of a large number of massive stars. We present a catalog obtained with recent optical observations in the r, i, z filters with OSIRIS, mounted on the 10.4 m Gran Telescopio CANARIAS telescope, which is the deepest optical catalog of Cyg OB2 to date. The catalog consists of 64,157 sources down to M = 0.15 M{sub Sun} at the adopted distance and age of Cyg OB2. A total of 38,300 sources have good photometry in all three bands. We combined the optical catalog with existing X-ray data of this region, in order to define the cluster locus in the optical diagrams. The cluster locus in the r - i versus i - z diagram is compatible with an extinction of the optically selected cluster members in the 2.64{sup m} < A{sub V} < 5.57{sup m} range. We derive an extinction map of the region, finding a median value of A{sub V} = 4.33{sup m} in the center of the association, decreasing toward the northwest. In the color-magnitude diagrams, the shape of the distribution of main-sequence stars is compatible with the presence of an obscuring cloud in the foreground {approx}850 {+-} 25 pc from the Sun.

  11. Radio-Continuum Emission From The Young Galactic Supernova Remnant G1.9+0.3

    E-Print Network [OSTI]

    A. Y. De Horta; M. D. Filipovi?; E. J. Crawford; F. H. Stootman; T. G. Pannuti; L. M. Bozzetto; J. D. Collier; E. R. Sommer; A. R. Kosakowski

    2014-08-22T23:59:59.000Z

    We present an analysis of a new Australia Telescope Compact Array (ATCA) radio-continuum observation of supernova remnant (SNR) G1.9+0.3, which at an age of $\\sim$181$\\pm$25 years is the youngest known in the Galaxy. We analysed all available radio-continuum observations at 6-cm from the ATCA and the Very Large Array. Using this data we estimate an expansion rate for G1.9+0.3 of 0.563%$\\pm$0.078% per year between 1984 and 2009. We note that in the 1980's G1.9+0.3 expanded somewhat slower (0.484% per year) than more recently (0.641% per year). We estimate that the average spectral index between 20-cm and 6-cm, across the entire SNR is $\\alpha=-0.72\\pm 0.26$ which is typical for younger SNRs. At 6-cm, we detect an average of 6% fractionally polarised radio emission with a peak of 17%$\\pm$3%. The polarised emission follows the contours of the strongest of X-ray emission. Using the new equipartition formula we estimate a magnetic field strength of B$\\approx 273\\mu$G, which to date, is one of the highest magnetic field strength found for any SNR and consistent with G1.9+0.3 being a very young remnant. This magnetic field strength implies a minimum total energy of the synchrotron radiation of E$_{\\textrm{min}} \\approx$ 1.8$\\times$10$^{48}$ ergs.

  12. ICE CHEMISTRY IN EMBEDDED YOUNG STELLAR OBJECTS IN THE LARGE MAGELLANIC CLOUD

    SciTech Connect (OSTI)

    Oliveira, J. M.; Van Loon, J. Th. [School of Physical and Geographical Sciences, Lennard-Jones Laboratories, Keele University, Staffordshire ST5 5BG (United Kingdom); Chen, C.-H. R.; Indebetouw, R. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States); Tielens, A. G. G. M. [Leiden Observatory, P.O. Box 9513, NL-2300 RA Leiden (Netherlands); Sloan, G. C. [Department of Astronomy, Cornell University, Ithaca, NY 14853 (United States); Woods, P. M.; Kemper, F. [Jodrell Bank Centre for Astrophysics, Alan Turing Building, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom); Gordon, K. D.; Boyer, M. L.; Shiao, B.; Meixner, M. [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Madden, S. [Service d'Astrophysique, Commissariat a L'Energie Atomique de Saclay, 91191 Gif-sur-Yvette (France); Speck, A. K. [Physics and Astronomy, University of Missouri, Columbia, MO 65211 (United States); Marengo, M. [Department of Physics and Astronomy, Iowa State University, Ames, IA 50010 (United States)

    2009-12-20T23:59:59.000Z

    We present spectroscopic observations of a sample of 15 embedded young stellar objects (YSOs) in the Large Magellanic Cloud (LMC). These observations were obtained with the Spitzer Infrared Spectrograph (IRS) as part of the SAGE-Spec Legacy program. We analyze the two prominent ice bands in the IRS spectral range: the bending mode of CO{sub 2} ice at 15.2 mum and the ice band between 5 and 7 mum that includes contributions from the bending mode of water ice at 6 mum among other ice species. The 5-7 mum band is difficult to identify in our LMC sample due to the conspicuous presence of polycyclic aromatic hydrocarbon emission superimposed onto the ice spectra. We identify water ice in the spectra of two sources; the spectrum of one of those sources also exhibits the 6.8 mum ice feature attributed in the literature to ammonium and methanol. We model the CO{sub 2} band in detail, using the combination of laboratory ice profiles available in the literature. We find that a significant fraction (approx>50%) of CO{sub 2} ice is locked in a water-rich component, consistent with what is observed for Galactic sources. The majority of the sources in the LMC also require a pure-CO{sub 2} contribution to the ice profile, evidence of thermal processing. There is a suggestion that CO{sub 2} production might be enhanced in the LMC, but the size of the available sample precludes firmer conclusions. We place our results in the context of the star formation environment in the LMC.

  13. A New Young Galactic Supernova Remnant Containing a Compact Object: G15.9+0.2

    E-Print Network [OSTI]

    S. P. Reynolds; K. J. Borkowski; U. Hwang; I. Harrus; R. Petre; G. Dubner

    2006-10-11T23:59:59.000Z

    We identify the radio-emitting shell-type supernova remnant G15.9+0.2 as a relatively young remnant containing an X-ray point source that may be its associated neutron star. The integrated spectrum of the remnant shell obtained from our 30 ks exploratory Chandra observation shows very strong lines that require elevated element abundances from ejecta, in particular of sulfur. A plane-shock model fit gives a temperature $kT = 0.9 (0.8, 1.0)$ keV, an ionization timescale $n_et = 6 (4, 9) \\times 10^{10}$ cm$^{-3}$ s, and a sulfur abundance of 2.1 (1.7, 2.7) times solar (90% confidence limits). Two-component models with one solar and one enriched component are also plausible, but are not well constrained by the data. Various estimates give a remnant age of order $10^3$ yr, which would make G15.9+0.2 among the dozen or so youngest remnants in the Galaxy. The sparse point source spectrum is consistent with either a steep $\\Gamma \\sim$ 4 power law or a $kT \\sim$ 0.4 keV blackbody. The spectrum is absorbed by a H column density $N_H \\sim 4 \\times 10^{22}$ cm$^{-2}$ similar to that required for the remnant shell. The implied 2--9.5 keV source luminosity is about $10^{33}$ ergs s$^{-1}$ for an assumed distance of 8.5 kpc consistent with the high absorption column. We suggest that the point source is either a rotation-powered pulsar or a compact central object (CCO).

  14. Ozone induces glucose intolerance and systemic metabolic effects in young and aged brown Norway rats

    SciTech Connect (OSTI)

    Bass, V. [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Gordon, C.J.; Jarema, K.A.; MacPhail, R.C. [Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Cascio, W.E. [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Phillips, P.M. [Toxicity Assessment Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Ledbetter, A.D.; Schladweiler, M.C. [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Andrews, D. [Research Cores Unit, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Miller, D. [Curriculum in Toxicology, University of North Carolina, Chapel Hill, NC (United States); Doerfler, D.L. [Research Cores Unit, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States); Kodavanti, U.P., E-mail: kodavanti.urmila@epa.gov [Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC (United States)

    2013-12-15T23:59:59.000Z

    Air pollutants have been associated with increased diabetes in humans. We hypothesized that ozone would impair glucose homeostasis by altering insulin signaling and/or endoplasmic reticular (ER) stress in young and aged rats. One, 4, 12, and 24 month old Brown Norway (BN) rats were exposed to air or ozone, 0.25 or 1.0 ppm, 6 h/day for 2 days (acute) or 2 d/week for 13 weeks (subchronic). Additionally, 4 month old rats were exposed to air or 1.0 ppm ozone, 6 h/day for 1 or 2 days (time-course). Glucose tolerance tests (GTT) were performed immediately after exposure. Serum and tissue biomarkers were analyzed 18 h after final ozone for acute and subchronic studies, and immediately after each day of exposure in the time-course study. Age-related glucose intolerance and increases in metabolic biomarkers were apparent at baseline. Acute ozone caused hyperglycemia and glucose intolerance in rats of all ages. Ozone-induced glucose intolerance was reduced in rats exposed for 13 weeks. Acute, but not subchronic ozone increased ?{sub 2}-macroglobulin, adiponectin and osteopontin. Time-course analysis indicated glucose intolerance at days 1 and 2 (2 > 1), and a recovery 18 h post ozone. Leptin increased day 1 and epinephrine at all times after ozone. Ozone tended to decrease phosphorylated insulin receptor substrate-1 in liver and adipose tissues. ER stress appeared to be the consequence of ozone induced acute metabolic impairment since transcriptional markers of ER stress increased only after 2 days of ozone. In conclusion, acute ozone exposure induces marked systemic metabolic impairments in BN rats of all ages, likely through sympathetic stimulation. - Highlights: • Air pollutants have been associated with increased diabetes in humans. • Acute ozone exposure produces profound metabolic alterations in rats. • Age influences metabolic risk factors in aging BN rats. • Acute metabolic effects are reversible and repeated exposure reduces these effects. • Ozone metabolic effects are only slightly exacerbated in geriatric rats.

  15. Resolved debris disk emission around eta Tel: a young Solar System or ongoing planet formation?

    E-Print Network [OSTI]

    R. Smith; L. J. Churcher; M. C. Wyatt; M. M. Moerchen; C. M. Telesco

    2008-10-28T23:59:59.000Z

    60% of the A star members of the 12 Myr old beta Pictoris moving group (BPMG) show significant excess emission in the mid-infrared, several million years after the proto-planetary disk is thought to disperse. Theoretical models suggest this peak may coincide with the formation of Pluto-sized planetesimals in the disk, stirring smaller bodies into collisional destruction. Here we present resolved mid-infrared imaging of the disk of eta Tel (A0V in the BPMG) and consider its implications for the state of planet formation in this system. eta Tel was observed at 11.7 and 18.3um using T-ReCS on Gemini South. The resulting images were compared to simple disk models to constrain the radial distribution of the emitting material. The emission observed at 18.3um is shown to be significantly extended beyond the PSF along a position angle 8 degrees. This is the first time dust emission has been resolved around eta Tel. Modelling indicates that the extension arises from an edge-on disk of radius 0.5 arcsec (~24 AU). Combining the spatial constraints from the imaging with those from the spectral energy distribution shows that >50% of the 18um emission comes from an unresolved dust component at ~4 AU. The radial structure of the eta Tel debris disk is reminiscent of the Solar System, suggesting that this is a young Solar System analogue. For an age of 12Myr, both the radius and dust level of the extended cooler component are consistent with self-stirring models for a protoplanetary disk of 0.7 times minimum mass solar nebula. The origin of the hot dust component may arise in an asteroid belt undergoing collisional destruction, or in massive collisions in ongoing terrestrial planet formation.

  16. Gamma-ray production in young open clusters: Berk 87, Cyg OB2 and Westerlund 2

    E-Print Network [OSTI]

    W. Bednarek

    2007-08-20T23:59:59.000Z

    Young open clusters are likely sites of cosmic ray acceleration as indicated by recent detections of the TeV gamma-ray sources in the directions of two open clusters (Cyg OB2 and Westerlund 2) and their directional proximity to some unidentified EGRET sources. In fact, up to now a few different scenarios for acceleration of particles inside open clusters have been considered, i.e. shocks in massive star winds, pulsars and their nebulae, supernova shocks, massive compact binaries. Here we consider in detail the radiation processes due to both electrons and hadrons accelerated inside the open cluster. As a specific scenario, we apply the acceleration process at the shocks arising in the winds of WR type stars. Particles diffuse through the medium of the open cluster during the activity time of the acceleration scenario defined by the age of the WR star. They interact with the matter and radiation, at first inside the open cluster and, later in the dense surrounding clouds. We calculate the broad band spectrum in different processes for three example open clusters (Berk 87, Cyg OB2, Westerlund 2) for which the best observational constraints on the spectra are at present available. It is assumed that the high energy phenomena, observed from the X-ray up to the GeV-TeV gamma-ray energies, are related to each other. We conclude that the most likely description of the radiation processes in these objects is achieved in the hybrid (leptonic-hadronic) model in which leptons are responsible for the observed X-ray and GeV gamma-ray emission and hadrons are responsible for the TeV gamma-ray emission, which is produced directly inside and in dense clouds surrounding the open cluster.

  17. Report on enhancing young scholars in science and technology the Center for Excellence in Education

    SciTech Connect (OSTI)

    NONE

    1996-09-30T23:59:59.000Z

    The present stock and flow of highly talented young persons engaged in the global discovery and application of science and technology are critical to the future pace of innovation. Historically, the world`s largest reservoirs of scientists and engineers have been in the Western economies. Overtime, however, Asia has begun to build equivalent pools of scientists and engineers among their university graduates. According to 1993 data from the National Science Foundation and the UNESCO World Science Report, Germany leads all economies with a 67% ratio of science and engineering degrees to total first university degrees compared to the United States with a distant fifth place at 32% behind Italy, Mexico and Poland. If the nation is to keep its scientific and technological prowess, it must capture its very best talent in the science and technology fields. The question is then raised as to the source within the United States of the science and technology talent pool. While between 1978 and 1991 there was an overall decline in male participation in undergraduate (-9%) and graduate degrees (-12%), the number of women receiving undergraduate (+8%) and graduate degrees (+34%) rose dramatically. These numbers are encouraging for women`s participation overall, however, women earn only a small percentage of physical science and engineering degrees. Why are there so few women in mathematics, engineering, and the physical sciences? The answers are complex and begin early in a woman`s exposure to science and mathematics. This report presents results on a study of careers of alumni from the Research Science Institute. Investigations were concerned with the timing of decision processes concerned with the sciences and math and factors that influenced people to turn away from or proceed with careers in science and math.

  18. Spectroscopy of New Substellar Candidates in the Pleiades: Towards a Spectral Sequence for Young Brown Dwarfs

    E-Print Network [OSTI]

    E. L. Martin; R. Rebolo; M. R. Zapatero Osorio

    1996-04-15T23:59:59.000Z

    We present optical and near-IR spectroscopy (600--1000 nm) of 8 faint (I$>$18) very red (R--I$>$2.2) objects discovered in a deep CCD survey of the Pleiades (Zapatero-Osorio et al. 1996). We compare them with reliable cluster members like PPl 15 and Teide 1, and with several field very late-type dwarfs (M4--M9.5), which were observed with similar instrumental configurations. Using pseudocontinuum ratios we classify the new substellar candidates in a spectal sequence defined with reference to field stars of known spectral types. We also reclassify PPl 15 and Teide 1 in a self-consistent way. The likelihood of membership for the new candidates is assesed via the study of their photospheric features, Ha emission, radial velocity, and consistency of their spectral types and I magnitudes with known cluster members. Four of the new substellar candidates are as late or later than PPl~15 (M6.5), but only one, Calar 3 (M8), clearly meets all our membership criteria. It is indeed an object very similar to the brown dwarf Teide 1. Calar 3, together with Teide 1, allows one to compare the spectroscopic characteristics of Pleiades brown dwarfs with those of old very cool dwarfs. The overall spectral properties are similar, but there are slight differences in the NaI doublet (818.3 nm, 819.5 nm), VO molecular band (740 nm), and some spectral ratios, which are probably related to lower surface gravity in the young Pleiades brown dwarfs than in field stars. Finally, we propose a way of improving future CCD-based brown dwarf surveys by using narrow-band near-IR pseudocontinuum filters.

  19. March 2014aMErIcaN METEOrOLOGIcaL SOcIETY | 1 AFFILIATIONS: Archer And Veron--University of Delaware,

    E-Print Network [OSTI]

    topics were explored: 1) wind resource assessment; 2) wind power forecasting; and 3) turbulent wake equivalent wind speed and possible impacts on turbine power production. In European waters, designated these research needs for wind energy along the U.S. East Coast, both coastal and offshore, was the goal of a two

  20. Young Stellar Clusters, WR-type Phenomenon and the Origin of the Galactic Center Nonthermal Radio Filaments

    E-Print Network [OSTI]

    F. Yusef-Zadeh

    2004-11-27T23:59:59.000Z

    Recent observations of the Arches cluster located within a projected distance of 30 pc from the dynamical center of the Galaxy have shown the presence of diffuse and discrete X-ray continuum emission, diffuse 6.4keV line emission as well as thermal and nonthermal radio continuum emission. This young and dense stellar cluster is also recognized to be within the 95% error circle of an identified steady source of $\\gamma$-ray emission associated with the EGRET source 3EG J1746--2851. Much of the thermal and nonthermal emission can be explained by shocked gas resulting from colliding winds originating from massive binaries within the cluster. In particular, we argue that nonthermal particles could upscatter the radiation field of the cluster by ICS and account for the $\\gamma$-ray emission. We also consider that the fluorescent 6.4 keV line emission may be the result of the impact of low-energy relativistic particles on neutral gas distributed in the vicinity of the cluster. Lastly, we sketch an interpretation in which young stellar clusters and massive young binary systems are responsible for the origin of nonthermal radio filaments found throughout the inner 300pc of the Galaxy. The collimation of the nonthermal filaments may be done in the colliding wind region by the ionized surface of individual mass-losing stars of massive binary systems. In this picture, a WR-type phenomenon is expected to power a central star burst in the Galactic center in order to account for all the observed filaments.

  1. Seasonal feeding habits of white-tailed deer (Odocoileus virginianus Bodd.) in young loblolly pine (pinus taeda L.) plantations

    E-Print Network [OSTI]

    Furrh, Patricia Louise

    1983-01-01T23:59:59.000Z

    Two-year old loblolly pine plantations were selected because at that age the tender apical buds of the young pines are within the feeding range of the deer. The two sites chosen had similar site preparation, were planted to the identical species..., as plant growth mstures in late spring or early suarer the tissues, particularly stems, of all species decline in palatability as the fiber fraction increases (Short 1969) . Thus, selectivity by deer may be affected by food quality as well as food...

  2. 2MASS J035523.37+113343.7: A YOUNG, DUSTY, NEARBY, ISOLATED BROWN DWARF RESEMBLING A GIANT EXOPLANET

    SciTech Connect (OSTI)

    Faherty, Jacqueline K. [Department of Astronomy, Universidad de Chile Cerro Calan, Las Condes (Chile); Rice, Emily L.; Cruz, Kelle L.; Nunez, Alejandro [Department of Astrophysics , American Museum of Natural History, Central Park West at 79th Street, New York, NY 10034 (United States); Mamajek, Eric E., E-mail: jfaherty17@gmail.com, E-mail: jfaherty@amnh.org [Cerro Tololo Inter-American Observatory, Casilla 603, La Serena (Chile)

    2013-01-01T23:59:59.000Z

    We present parallax and proper motion measurements, near-infrared spectra, and Wide-field Infrared Survey Explorer photometry for the low surface gravity L5{gamma} dwarf 2MASS J035523.37+113343.7 (2M0355). We use these data to evaluate photometric, spectral, and kinematic signatures of youth as 2M0355 is the reddest isolated L dwarf yet classified. We confirm its low-gravity spectral morphology and find a strong resemblance to the sharp triangular shaped H-band spectrum of the {approx}10 Myr planetary-mass object 2M1207b. We find that 2M0355 is underluminous compared to a normal field L5 dwarf in the optical and Mauna Kea Observatory J, H, and K bands and transitions to being overluminous from 3 to 12 {mu}m, indicating that enhanced photospheric dust shifts flux to longer wavelengths for young, low-gravity objects, creating a red spectral energy distribution. Investigating the near-infrared color-magnitude diagram for brown dwarfs confirms that 2M0355 is redder and underluminous compared to the known brown dwarf population, similar to the peculiarities of directly imaged exoplanets 2M1207b and HR8799bcd. We calculate UVW space velocities and find that the motion of 2M0355 is consistent with young disk objects (<2-3 Gyr) and it shows a high likelihood of membership in the AB Doradus association.

  3. Geologic Characterization of Young Alluvial Basin-Fill Deposits from Drill Hole Data in Yucca Flat, Nye County, Nevada.

    SciTech Connect (OSTI)

    Donald S. Sweetkind; Ronald M. Drake II

    2007-01-22T23:59:59.000Z

    Yucca Flat is a topographic and structural basin in the northeastern part of the Nevada Test Site (NTS) in Nye County, Nevada, that has been the site of numerous underground nuclear tests; many of these tests occurred within the young alluvial basin-fill deposits. The migration of radionuclides to the Paleozoic carbonate aquifer involves passage through this thick, heterogeneous section of Tertiary and Quaternary rock. An understanding of the lateral and vertical changes in the material properties of young alluvial basin-fill deposits will aid in the further development of the hydrogeologic framework and the delineation of hydrostratigraphic units and hydraulic properties required for simulating ground-water flow in the Yucca Flat area. This report by the U.S. Geological Survey, in cooperation with the U.S. Department of Energy, presents data and interpretation regarding the three-dimensional variability of the shallow alluvial aquifers in areas of testing at Yucca Flat, data that are potentially useful in the understanding of the subsurface flow system. This report includes a summary and interpretation of alluvial basin-fill stratigraphy in the Yucca Flat area based on drill hole data from 285 selected drill holes. Spatial variations in lithology and grain size of the Neogene basin-fill sediments can be established when data from numerous drill holes are considered together. Lithologic variations are related to different depositional environments within the basin including alluvial fan, channel, basin axis, and playa deposits.

  4. Enhanced X-ray variability from V1647 Ori, the young star in outburst illuminating McNeil's Nebula

    E-Print Network [OSTI]

    Grosso, N; Ozawa, H; Richmond, M; Simon, T; Weintraub, D A; Hamaguchi, K; Frank, A

    2005-01-01T23:59:59.000Z

    We report a ~38 ks X-ray observation of McNeil's Nebula obtained with XMM on 2004 April 4. V1647 Ori, the young star in outburst illuminating McNeil's Nebula, is detected with XMM and appears variable in X-rays. We investigate the hardness ratio variability and time variations of the event energy distribution with quantile analysis, and show that the large increase of the count rate from V1647 Ori observed during the second half of the observation is not associated with any large plasma temperature variations as for typical X-ray flares from young low-mass stars. X-ray spectral fitting shows that the bulk (~75%) of the intrinsic X-ray emission in the 0.5-8 keV energy band comes from a soft plasma component (0.9 keV) reminiscent of the X-ray spectrum of the classical T Tauri star TW Hya, for which X-ray emission is believed to be generated by an accretion shock onto the photosphere of a low-mass star. The hard plasma component (4.2 keV) contributes ~25% of the total X-ray emission, and can be understood only i...

  5. KEPLER-63b: A GIANT PLANET IN A POLAR ORBIT AROUND A YOUNG SUN-LIKE STAR

    SciTech Connect (OSTI)

    Sanchis-Ojeda, Roberto; Winn, Joshua N.; Albrecht, Simon [Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139 (United States); Marcy, Geoffrey W.; Isaacson, Howard [Astronomy Department, University of California, Berkeley, CA 94720 (United States); Howard, Andrew W. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Johnson, John Asher [Department of Astronomy, California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125 (United States); Torres, Guillermo; Carter, Joshua A.; Dawson, Rebekah I.; Geary, John C. [Harvard-Smithsonian Center for Astrophysics, Cambridge, MA 02138 (United States); Campante, Tiago L.; Chaplin, William J.; Davies, Guy R. [School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT (United Kingdom); Lund, Mikkel N. [Stellar Astrophysics Centre (SAC), Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C (Denmark); Buchhave, Lars A. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen (Denmark); Everett, Mark E. [National Optical Astronomy Observatory, 950 N. Cherry Ave, Tucson, AZ 85719 (United States); Fischer, Debra A. [Astronomy Department, Yale University, New Haven, CT (United States); Gilliland, Ronald L. [Center for Exoplanets and Habitable Worlds, The Pennsylvania State University, 525 Davey Lab, University Park, PA 16802 (United States); Horch, Elliott P. [Southern Connecticut State University, New Haven, CT 06515 (United States); and others

    2013-09-20T23:59:59.000Z

    We present the discovery and characterization of a giant planet orbiting the young Sun-like star Kepler-63 (KOI-63, m{sub Kp} = 11.6, T{sub eff} = 5576 K, M{sub *} = 0.98 M{sub ?}). The planet transits every 9.43 days, with apparent depth variations and brightening anomalies caused by large starspots. The planet's radius is 6.1 ± 0.2 R{sub ?}, based on the transit light curve and the estimated stellar parameters. The planet's mass could not be measured with the existing radial-velocity data, due to the high level of stellar activity, but if we assume a circular orbit, then we can place a rough upper bound of 120 M{sub ?} (3?). The host star has a high obliquity (? = 104°), based on the Rossiter-McLaughlin effect and an analysis of starspot-crossing events. This result is valuable because almost all previous obliquity measurements are for stars with more massive planets and shorter-period orbits. In addition, the polar orbit of the planet combined with an analysis of spot-crossing events reveals a large and persistent polar starspot. Such spots have previously been inferred using Doppler tomography, and predicted in simulations of magnetic activity of young Sun-like stars.

  6. Exploring the faint young Sun problem and the possible climates of the Archean Earth with a 3-D GCM

    E-Print Network [OSTI]

    Charnay, Benjamin; Wordsworth, Robin; Leconte, Jérémy; Millour, Ehouarn; Codron, Francis; Spiga, Aymeric

    2013-01-01T23:59:59.000Z

    Different solutions have been proposed to solve the "faint young Sun problem", defined by the fact that the Earth was not fully frozen during the Archean despite the fainter Sun. Most previous studies were performed with simple 1-D radiative convective models and did not account well for the clouds and ice-albedo feedback or the atmospheric and oceanic transport of energy. We apply a global climate model (GCM) to test the different solutions to the faint young Sun problem. We explore the effect of greenhouse gases (CO2 and CH4), atmospheric pressure, cloud droplet size, land distribution, and Earth's rotation rate. We show that neglecting organic haze, 100 mbar of CO2 with 2 mbar of CH4 at 3.8 Ga and 10 mbar of CO2 with 2 mbar of CH4 at 2.5 Ga allow a temperate climate (mean surface temperature between 10{\\deg}C and 20{\\deg}C). Such amounts of greenhouse gases remain consistent with the geological data. Removing continents produces a warming lower than +4{\\deg}C. The effect of rotation rate is even more limit...

  7. An ozone climatology of the Dallas-Fort Worth area and its relationship to meteorology

    E-Print Network [OSTI]

    Nobis, Timothy Edward

    1998-01-01T23:59:59.000Z

    , no extensive studies on ozone in this area have been published. This study presents a broad overview of the ozone problem in the DFW area. An ozone spatial and temporal climatology was constructed using ozone data at 23 different monitoring sites from 1980...

  8. Application of CC® at a Corporate Headquarters Facility in Dallas, TX

    E-Print Network [OSTI]

    Meline, K.; Kimla, J.

    2011-01-01T23:59:59.000Z

    of data floor space. This building was identified as a candidate for the CC process because it consumed 58% of the 132 million kWh of electricity used by the complex in 2010 and had recently received several HVAC upgrades. CC is an ongoing process...

  9. APS/DFD 2002, November 25 (Dallas, TX) [FE.1] Numerical analysis

    E-Print Network [OSTI]

    Ichiki, Kengo

    Duan­Krasny (2000) J. Chem. Phys. 113, 3492 . Laplace problem (electrostatic interaction) . Multipole

  10. Investigation of Trinity River paleochannels in the central business district, Dallas, Texas

    E-Print Network [OSTI]

    Brillinger, Allan Brown

    1985-01-01T23:59:59.000Z

    significant flows of gasoline and ground-water from the fluvial sands. Organization and analysis of over 1, 000 geotechnical logs from the central business district allowed interpretation of the fluvial deposits to determine the sources of hazardous fluids... and ground-water and to predict where future excavations may encounter similar problems, as well as problems with slope stability. Paleochannels and associated fluvial deposits are present on the Union Terminal and Travis School bedrock terraces. Love...

  11. Energy Consumption Analysis of the Habitat For Humanity Homes at Frazier Court Dallas, Texas

    E-Print Network [OSTI]

    Mukhopadhyay, Jaya; Liu, Zi; Baltazar, Juan Carlos; Haberl, Jeff; Lewis, Cynthia; Bahman, Yazdani

    Jaya Mukhopadhyay Zi Liu Juan-Carlos Baltazar Jeff Haberl Cynthia Lewis Bahman Yazdani Energy Systems Laboratory Texas A&M University System August 2010 Energy Consumption Analysis of the Habitat For Humanity Homes at Frazier Court... : kWh/yr = 0.03492 x CFA + 29.565 x (Nbr + 1) Where CFA = Conditioned floor area Nbr = Number of Bedrooms B ac k g ro u n d C o n cl u si o n s R es u lt s H o u se D es . S o u rc e: h tt p :/ /e n er g y so lu ti o n sn m .c o m /s er...

  12. Intern experience at Dallas Power and Light Company: an internship report 

    E-Print Network [OSTI]

    Fischer, Roger Lewis, 1945-

    2013-03-13T23:59:59.000Z

    ?I:T.U NV? V?0?VV?. IT NU I:? RVTSI: AT.?Un F:? 0-VUI AT.? S-EE l? tNEE?. (GNtNOI .?G?ET3A?OI( l?tN?U? -O I:-U AT.? TOE6 I:? ENO. I:NI -U 3V?U?OIE6 GNtNOI -U t:NOR?. -O ?U?n F:NI -U; I:? 3V?G-T?UE6 GNtNOI ENO. -U OTS .?G?ET3?.n F:? U?tTO. RVTSI: AT.? -U... tNEE?. (V?.?G?ET3A?OI( U-Ot? -O I:-U AT.? NEE T0 I:? ENO. S-I:-O N t?EE -U t:NOR?. 0VTA 3V?U?OI ?U? IT I:NI .-tINI?. l6 I:? t-I6 DTO-OR 0TV I:NI NV?Nn *I U:T?E. l? OTI?. I:NI -O lTI: AT.?U I:? RVTSI: IN)?U 3ENt? NU -O.-tNI?. -O I:? t-I6 DTO-OR TV...

  13. Top 10 Considerations of 2012 IECC and IgCC in Dallas 

    E-Print Network [OSTI]

    Basora, Z.

    2013-01-01T23:59:59.000Z

    Antonio, Texas Dec. 16-18 Energy and Green Top 10 #10 IECC 2012 Energy Code ?Model Code; base level provisions for energy IgCC 2012 Green Code ?Overlay code; adds green building design and construction provisions to other codes such as energy... addressed in ICC-700 standard 5 Energy and Green Top 10 #9 IECC 2012 Energy Code IgCC 2012 Green Code ESL-KT-13-12-31 CATEE 2013: Clean Air Through Energy Efficiency Conference, San Antonio, Texas Dec. 16-18 ? Energy compliance for four main building...

  14. The Chemical Composition of Soils of Cameron, Coleman, Dallas, Erath, Harris, Reeves, Rockwall and Tarrant Counties.

    E-Print Network [OSTI]

    Fraps, G. S. (George Stronach)

    1931-01-01T23:59:59.000Z

    the relative deficiencies of plant food in the soil. The corn possibility is also a convenient way of comparing amounts of various plant foods in the same soil. For example, with the Lake Charles clay loam of Harris county, the corn possibility for total... nitrogen is 28, for active phos- phoric acid is 12, and for the active potash 50. The soil is probably deficient both in phosphoric acid and in nitrogen. This may he com- pared with the Victoria clay loam of Cameron countv, which has a corn possibility...

  15. Alternate stabilizers: solution towards reducing sulfate swell in expansive clay subgrades in Dallas district

    E-Print Network [OSTI]

    Rajendran, Deepa

    1997-01-01T23:59:59.000Z

    with commercially available nonstandard stabilizers. From the tests conducted, two of the additives tested namely, Roadbond ENI and EMC Squared were found to show superior qualities regarding strength, stiffness, permeability and other properties when compared...

  16. Erik Jonsson School of Engineering and Computer Science The University of Texas at Dallas 1

    E-Print Network [OSTI]

    O'Toole, Alice J.

    motors, lighting systems, automotive electronics and navigation systems. Careers are available engineers design, develop and test a wide range of electronic systems, including microelectronics, electric

  17. The Effect of Light Rail Transit on Employment: A Case Study of Dallas, Texas

    E-Print Network [OSTI]

    Mendez, Joel

    2014-08-05T23:59:59.000Z

    The decentralization of residents and jobs from central cities has greatly impacted low income residents as they have remained in the central city while employment opportunities are locating further away. This trend has negatively impacted...

  18. Analyzing spatial-temporal patterns of motor vehicle crashes using GIS: a case study in Dallas 

    E-Print Network [OSTI]

    Lu, Bing

    2003-01-01T23:59:59.000Z

    This paper uses GIS to analyze the characteristics of temporal and spatial distributions of motor vehicle crashes. These characteristics include that traffic accidents are most likely to occur in the afternoon "rush hour" (4:00 - 6:00PM...

  19. The feasibility of a helicopter passenger service in the Dallas-Fort Worth area

    E-Print Network [OSTI]

    Kelley, Nelson Lane

    1965-01-01T23:59:59.000Z

    petfetseeee betm a, fmt~~ -~ffektp, xeXfemxty, : -sag' ~e sf-. pff pJ, fef;@ '-k. :: ~'ee'S Chp' ~et -smf&QXs. ttagspei&. hiive? fsi@~es', ' 1-~, , k ', ". "=:~t44eg", stot:: habet'. the'R0$88e5, s easf+tggf h s~ that teste XfCCXe m se se...

  20. The University of Texas at Dallas 2014-2015 Academic Senate Membership

    E-Print Network [OSTI]

    O'Toole, Alice J.

    -Dhahir Zalman Balanov Poras Balsara Karen Baynham Kurt Beron Adam Brackin Judd Bradbury Gail Breen Matthew Brown-2015 Academic Senate Membership Yulia Gel Lev Gelb Jennifer Holmes M. Ali Hooshyar M. Ishak-Boushaki Joe Izen

  1. Electrical Engineering Seminar Series & Dallas Chapter of IEEE Signal Processing Society Present

    E-Print Network [OSTI]

    O'Toole, Alice J.

    University of Brazil, Brazil Distinguished Lecturer of IEEE Signal Processing Society 11:00am, Monday, Oct 17 and contributed chapters to books as well. He also holds 46 issued patents. According to Harzing's Publish in Brazil and in Latin America. He is the General Chair of ISCAS'2011, MMSP'2009, and SBrT'2012. He was also

  2. A dynamical analysis of the Dallas tornado of 2 April 1957

    E-Print Network [OSTI]

    Shunk, James Frederick

    1965-01-01T23:59:59.000Z

    . Approximate tangential velocity field (subsection)r I ~ a ~ ~ o ~ 0 ~ ~ ~ 28 7. Theoretical stream function field (fullsection). . . . . . , . . . . . . . . . . 30 8. Theoretical stream function field (subsection). . . . . . . . . . , , ~ ~ 32 Stream... courteey of Bill Burkett. ) 10 incompressibility, and the use of a convergent radial speed v distribution proportional to I/R where R is radial distance from the axis of the tornado and 0 ~ n &1. The assumed distribution was constructed so that v...

  3. The Department of Computer Science at the University of Texas at Dallas

    E-Print Network [OSTI]

    Kreinovich, Vladik

    on assigned research projects at the university, field trips to Raytheon, Lockheed Martin Aeronautics Company: · David Struble (Raytheon Network Centric Systems) · Mike Siok (Lockheed Martin Aeronautics Company) · Tom

  4. Intern experience at Dallas Power and Light Company: an internship report

    E-Print Network [OSTI]

    Fischer, Roger Lewis, 1945-

    2013-03-13T23:59:59.000Z

    CMIi 1cpr Figure A-3 .?ANO.U S-EE l? NI UTA? 0?I?V? 3T-OI -O I-A?n *O TV.?V IT NttTA3E-U: I:-U INU); N ENO. ?U? RVTSI: 3VTt?UU -U ?U?.n 4VTSI: HVTt?UU F:? ENO. ?U? S-I:-O N t?EE tNO NO. S-EE t:NOR? TG?V I-A?n B-I:-O I:? K-I6 T0 9NEENU; DTO-OR V?0E... ?o L C CL T" (VI CO N N N p 9 9 t 1 t r PI o d / *v / ZJ iX iX i1 z o o o o 04 ^ N tT N ? p + CM N ? ? g Z + < V5? N ?^- ? V\\?N ? LU L CM8 * z ? KK O h p < E-Y K, x z a o CM + ? * LU...

  5. The feasibility of a helicopter passenger service in the Dallas-Fort Worth area 

    E-Print Network [OSTI]

    Kelley, Nelson Lane

    1965-01-01T23:59:59.000Z

    I Psx'sf, el Kw~X& l;Snab af '@e rejeigmedte %aj. 'phd Be+em 'og 5 By. EMsrm Xapa Kathy Approved hs 00 @~ale ~ qmCeha. by& M-5R $8gQR~B&) ' r Hl59g , ' ' G:-G 'K 5 5:. 'N 'g S ':" 5 :''''I-. . 1. 05t$8ctf vog... - -- - ? ' ? - - 1, S XXX SVAMNXGS AMS SEEN' GP Sg~ ??- - . ' ' 19 QQXI XGS ~ ??? ~ ? R?? 79 Xg S 55??' ?' ?? ~ ~' . ? ? ' ' ? 3R S Qfto1 XG7 V S~gg l XV RKXSSIUG'~ 'AMG FG'g5555XQ GF TIE QN8d@ VGA 'BGSXH ~ Qx' ?sg S-'M?' ea...

  6. som.utdallas.edu/c4isn UT Dallas School of Management

    E-Print Network [OSTI]

    O'Toole, Alice J.

    and government and industry to solve emerging problems in product lifecycle and supply chain management Offers education in product lifecycle management, supply chain management, sourcing management and Lean Six Sigma is to be a recognized leader and premier provider of product lifecycle and supply chain management education, research

  7. A Study of Heuristic Approaches for Runway Scheduling for the Dallas-Fort Worth Airport

    E-Print Network [OSTI]

    Stiverson, Paul W.

    2010-01-16T23:59:59.000Z

    as well as degrading the passenger experience. There are a number of factors that cause delay, chief among these is weather. Some factors, like mechanical troubles, cause a localized delay that doesn?t necessarily affect other aircraft. It is reported...: for i?1?|I|do 7: for j?1?|I|do 8: P ?I 9: P[i]?I[j] 10: P[j]?I[i] 11: if prelimOrderFeasible then 12: objecive?prelimObjectiveCheck 13: if objective < oldObjective then 14: I?P 15: oldObjective?objective 16: improvement?1 17: end if 18: end if 19: end...

  8. The possibilities and problems of multi-unit, earth covered housing in the Dallas area

    E-Print Network [OSTI]

    Beaudette, Joseph Ely

    1979-01-01T23:59:59.000Z

    in the construction field. These included; Frank Moreland, architect and builder of earth covered shelters in Ft. Worth, Richy Woods, who heads project development for Construction Modules and all the other people who I came in contact with at H. B, Zachary Co.... 13. --Soil Drainage Profile . . . . . . . . . . . 61 FIG. 14. --Module Drainage . . . ~. . . . . . . . 61 FIG. 15. --Site Drainage Techniques . . . ~ ~ ~ . ~ ~ ~ . . . . . ~ . 62 FIG. 16. --Catch Basin System ~ ~ ~ ~ ~ ~ ~ ~ ~ 63 ~ 68 FIG. 17...

  9. AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION UNIVERSITY The University of Texas at Dallas

    E-Print Network [OSTI]

    O'Toole, Alice J.

    , Daniel Cohen, David Cordell, Gregg Dieckmann, John Ferguson, Jeremy Hall, Joe Izen, Kamran Kiasaleh Jamison, Serenity King, Abby Kratz, Emily Tobey, Austin Cunningham, Kayla Klein 1. CALL TO ORDER

  10. AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION UNIVERSITY The University of Texas at Dallas

    E-Print Network [OSTI]

    O'Toole, Alice J.

    Cantrell, David Cordell, Gregg Dieckmann, John Ferguson, Lev Gelb Jeremy Hall, Mustapha Ishak-Boushaki, Joe, Chris Parr, Austin Cunningham, Sheila Amin Gutierrez de Pineres, Mary Jo Venetis, Sharkey Andrews 1

  11. AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION UNIVERSITY The University of Texas at Dallas

    E-Print Network [OSTI]

    O'Toole, Alice J.

    : Shawn Alborz, Bobby Alexander, Peter Assman, Kurt Beron, Gail Breen, John Burr, Cy Cantrell, Gregg, Kayla Klein, Austin Cunningham, Blair Flicker 1. CALL TO ORDER, ANNOUNCEMENTS AND QUESTIONS Speaker Leaf

  12. AN EQUAL OPPORTUNITY/AFFIRMATIVE ACTION UNIVERSITY The University of Texas at Dallas

    E-Print Network [OSTI]

    O'Toole, Alice J.

    Cordell, Greg Dess, Gregg Dieckmann, John Ferguson, Lev Gelb, Mustapha Ishak-Boushaki, Joe Izen, Murray Jamison, Austin Cunningham, Marilyn Kaplan, Serenity King, Abby Kratz, Sheila Piñeres, Mary Jo Venetis

  13. 2004 Specifications Abilene, Austin, Brownwood, Childress, Dallas, Fort Worth, Waco and Wichita Falls Districts

    E-Print Network [OSTI]

    Mukhtar, Saqib

    trimmings, biosolids, food scraps, food-processing residuals, manure or other agricultural residuals, forest (CFR), Title 40, Part 503 standards for Class A biosolids and Texas Commission on Environmental Quality that the compost meets the requirements of Table 1. When furnishing biosolids compost, also provide a copy

  14. The University of Texas at Dallas--Computer Science Program CS 5348--Exam I

    E-Print Network [OSTI]

    Venkatesan, S.

    customer leaves. Assume that the entry and exit gates are nearby and both are connected to the same computer. Code a solution to this problem using semaphores. (Code processes control_entry_gate and control_exit_gate.) Assume functions calls open_entry_gate(), close_entry_gate(), open_exit_gate() and close_exit

  15. Analyzing spatial-temporal patterns of motor vehicle crashes using GIS: a case study in Dallas

    E-Print Network [OSTI]

    Lu, Bing

    2003-01-01T23:59:59.000Z

    This paper uses GIS to analyze the characteristics of temporal and spatial distributions of motor vehicle crashes. These characteristics include that traffic accidents are most likely to occur in the afternoon "rush hour" (4:00 - 6:00PM...

  16. Energy Consumption Analysis of the Habitat For Humanity Homes at Frazier Court Dallas, Texas 

    E-Print Network [OSTI]

    Mukhopadhyay, Jaya; Liu, Zi; Baltazar, Juan Carlos; Haberl, Jeff; Lewis, Cynthia; Bahman, Yazdani

    2010-01-01T23:59:59.000Z

    Fusarium verticillioides (Teleomorph Giberella moniliformis) is an ascomycete fungus responsible for ear and stalk rots of maize. Most importantly, it produces a group of mycotoxins called fumonisins upon colonization of ...

  17. Alternate stabilizers: solution towards reducing sulfate swell in expansive clay subgrades in Dallas district 

    E-Print Network [OSTI]

    Rajendran, Deepa

    1997-01-01T23:59:59.000Z

    The practice of using lime as a stabilizer during construction of pavements is widespread and is considered economical. However under certain conditions, the beneficial effects of lime stabilization is overridden. Proximity of gypsum deposits...

  18. EECBG Success Story: Dallas: Building a Greener City | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny:Revised Finding of98-F, Western Systems PowerDepartment ofDepartment of

  19. EECBG Success Story: Dallas: Building a Greener City | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015 Business42.1Energy |FinalEESS-7 to export electricCanada.Gridthe Road |Thanks

  20. Alternative Fuels Data Center: Biodiesel and Propane Fuel Buses for Dallas

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041cloth DocumentationProducts (VAP)MassachusettsExperimentalInfrastructure DevelopmentTreeCounty

  1. Leeds School of Business, University of Colorado, UCB 419, Boulder, CO 80309; kenneth.younge@colorado.edu MIT Sloan School of Management, 100 Main Street, E62-478, Cambridge, MA 02142; mmarx@mit.edu

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    that they capture value from the knowledge that they create. Firms earn supranormal returns only to the extent.younge@colorado.edu MIT Sloan School of Management, 100 Main Street, E62-478, Cambridge, MA 02142; mmarx@mit.edu The Market Value of Knowledge Protection: Evidence from a Natural Experiment Kenneth A. Younge Matt Marx

  2. B. Mobasher, S-Y.Chen, C. Young and S. D. Rajan, "Cost-Based Design Of Residential Steel Roof Systems: A Case Study", Structural Engineering and Mechanics 8:(2) pp.165-180,1999.

    E-Print Network [OSTI]

    Mobasher, Barzin

    B. Mobasher, S-Y.Chen, C. Young and S. D. Rajan, "Cost-Based Design Of Residential Steel Roof OF RESIDENTIAL STEEL ROOF SYSTEMS: A CASE STUDY S. D. Rajan 1 , B. Mobasher 2 , S-Y.Chen 3 and C. Young 3 The cost effectiveness of steel roof systems for residential buildings is becoming increasingly apparent

  3. Technical Report, Brigham Young University, http://hdl.handle.net/1877/588. In press, IEEE Antennas and Wireless Propagation Letters, c 2008 IEEE 1 Efficiencies and System Temperature for a

    E-Print Network [OSTI]

    Wirthlin, Michael J.

    Technical Report, Brigham Young University, http://hdl.handle.net/1877/588. In press, IEEE Antennas [1] is useful for quantifying mismatch loss. The element efficiency can be used to parameterize of Electrical and Computer Engineering, 459 Clyde Building, Brigham Young University, Provo, UT 84602

  4. Focused acoustic beam imaging of grain structure and local Young's modulus with Rayleigh and surface skimming longitudinal waves

    SciTech Connect (OSTI)

    Martin, R. W.; Sathish, S. [University of Dayton Research Institute, Structural Integrity Division 300 College Park Drive, Dayton, OH, 45469 (United States); Blodgett, M. P. [Air Force Research Lab, RXCA, Wright Patterson AFB, OH, 45433 (United States)

    2013-01-25T23:59:59.000Z

    The interaction of a focused acoustic beam with materials generates Rayleigh surface waves (RSW) and surface skimming longitudinal waves (SSLW). Acoustic microscopic investigations have used the RSW amplitude and the velocity measurements, extensively for grain structure analysis. Although, the presence of SSLW has been recognized, it is rarely used in acoustic imaging. This paper presents an approach to perform microstructure imaging and local elastic modulus measurements by combining both RSW and SSLW. The acoustic imaging of grain structure was performed by measuring the amplitude of RSW and SSLW signal. The microstructure images obtained on the same region of the samples with RSW and SSLW are compared and the difference in the contrast observed is discussed based on the propagation characteristics of the individual surface waves. The velocity measurements are determined by two point defocus method. The surface wave velocities of RSW and SSLW of the same regions of the sample are combined and presented as average Young's modulus image.

  5. THE GEMINI NICI PLANET-FINDING CAMPAIGN: THE FREQUENCY OF GIANT PLANETS AROUND YOUNG B AND A STARS

    SciTech Connect (OSTI)

    Nielsen, Eric L.; Liu, Michael C.; Chun, Mark; Ftaclas, Christ [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Wahhaj, Zahed [European Southern Observatory, Alonso de Córdova 3107, Vitacura, Santiago (Chile); Biller, Beth A. [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg (Germany); Hayward, Thomas L.; Hartung, Markus [Gemini Observatory, Southern Operations Center, c/o AURA, Casilla 603, La Serena (Chile); Close, Laird M.; Males, Jared R.; Skemer, Andrew J. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Alencar, Silvia H. P. [Departamento de Fisica, ICEx, Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, 30270-901 Belo Horizonte, MG (Brazil); Artymowicz, Pawel [University of Toronto at Scarborough, 1265 Military Trail, Toronto, Ontario M1C 1A4 (Canada); Boss, Alan [Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, N.W., Washington, DC 20015 (United States); Clarke, Fraser [Department of Astronomy, University of Oxford, DWB, Keble Road, Oxford OX1 3RH (United Kingdom); De Gouveia Dal Pino, Elisabete; Gregorio-Hetem, Jane [Departamento de Astronomia, Universidade de Sao Paulo, IAG/USP, Rua do Matao 1226, 05508-900 Sao Paulo, SP (Brazil); Ida, Shigeru [Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550 (Japan); Kuchner, Marc [NASA Goddard Space Flight Center, Exoplanets and Stellar Astrophysics Laboratory, Greenbelt, MD 20771 (United States); Lin, Douglas N. C. [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA (United States); and others

    2013-10-10T23:59:59.000Z

    We have carried out high contrast imaging of 70 young, nearby B and A stars to search for brown dwarf and planetary companions as part of the Gemini NICI Planet-Finding Campaign. Our survey represents the largest, deepest survey for planets around high-mass stars (?1.5-2.5 M{sub ?}) conducted to date and includes the planet hosts ? Pic and Fomalhaut. We obtained follow-up astrometry of all candidate companions within 400 AU projected separation for stars in uncrowded fields and identified new low-mass companions to HD 1160 and HIP 79797. We have found that the previously known young brown dwarf companion to HIP 79797 is itself a tight (3 AU) binary, composed of brown dwarfs with masses 58{sup +21}{sub -20} M{sub Jup} and 55{sup +20}{sub -19} M{sub Jup}, making this system one of the rare substellar binaries in orbit around a star. Considering the contrast limits of our NICI data and the fact that we did not detect any planets, we use high-fidelity Monte Carlo simulations to show that fewer than 20% of 2 M{sub ?} stars can have giant planets greater than 4 M{sub Jup} between 59 and 460 AU at 95% confidence, and fewer than 10% of these stars can have a planet more massive than 10 M{sub Jup} between 38 and 650 AU. Overall, we find that large-separation giant planets are not common around B and A stars: fewer than 10% of B and A stars can have an analog to the HR 8799 b (7 M{sub Jup}, 68 AU) planet at 95% confidence. We also describe a new Bayesian technique for determining the ages of field B and A stars from photometry and theoretical isochrones. Our method produces more plausible ages for high-mass stars than previous age-dating techniques, which tend to underestimate stellar ages and their uncertainties.

  6. Proton Radiation Therapy for Pediatric Medulloblastoma and Supratentorial Primitive Neuroectodermal Tumors: Outcomes for Very Young Children Treated With Upfront Chemotherapy

    SciTech Connect (OSTI)

    Jimenez, Rachel B., E-mail: rbjimenez@partners.org [Harvard Radiation Oncology Program, Boston, Massachusetts (United States); Sethi, Roshan [Harvard Medical School, Boston, Massachusetts (United States); Depauw, Nicolas [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States); Pulsifer, Margaret B. [Department of Psychiatry, Massachusetts General Hospital, Boston, Massachusetts (United States); Adams, Judith [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States); McBride, Sean M. [Harvard Radiation Oncology Program, Boston, Massachusetts (United States); Ebb, David [Department of Pediatrics, Massachusetts General Hospital, Boston, Massachusetts (United States); Fullerton, Barbara C.; Tarbell, Nancy J.; Yock, Torunn I.; MacDonald, Shannon M. [Department of Radiation Oncology, Massachusetts General Hospital, Boston, Massachusetts (United States)

    2013-09-01T23:59:59.000Z

    Purpose: To report the early outcomes for very young children with medulloblastoma or supratentorial primitive neuroectodermal tumor (SPNET) treated with upfront chemotherapy followed by 3-dimensional proton radiation therapy (3D-CPT). Methods and Materials: All patients aged <60 months with medulloblastoma or SPNET treated with chemotherapy before 3D-CPT from 2002 to 2010 at our institution were included. All patients underwent maximal surgical resection, chemotherapy, and adjuvant 3D-CPT with either craniospinal irradiation followed by involved-field radiation therapy or involved-field radiation therapy alone. Results: Fifteen patients (median age at diagnosis, 35 months) were treated with high-dose chemotherapy and 3D-CPT. Twelve of 15 patients had medulloblastoma; 3 of 15 patients had SPNET. Median time from surgery to initiation of radiation was 219 days. Median craniospinal irradiation dose was 21.6 Gy (relative biologic effectiveness); median boost dose was 54.0 Gy (relative biologic effectiveness). At a median of 39 months from completion of radiation, 1 of 15 was deceased after a local failure, 1 of 15 had died from a non-disease-related cause, and the remaining 13 of 15 patients were alive without evidence of disease recurrence. Ototoxicity and endocrinopathies were the most common long-term toxicities, with 2 of 15 children requiring hearing aids and 3 of 15 requiring exogenous hormones. Conclusions: Proton radiation after chemotherapy resulted in good disease outcomes for a small cohort of very young patients with medulloblastoma and SPNET. Longer follow-up and larger numbers of patients are needed to assess long-term outcomes and late toxicity.

  7. 3rd Work. for Young Researchers on Human-Friendly Robotics, Oct. 2010, Tubingen, Germany Towards Bilateral Teleoperation of Multi-Robot Systems

    E-Print Network [OSTI]

    . For instance, robots are expected to relieve us from monotonous and physically demanding work in industrial.g., telepresence applications where the human operator capabilities are mediated/magnified by the remote robots3rd Work. for Young Researchers on Human-Friendly Robotics, Oct. 2010, T¨ubingen, Germany Towards

  8. G.-L. THOMAS and SYDNEY YOUNG. -The vapour pressures, specific volumes, and critical constants of normal hexane (Tensions de vapeur, volumes spci-

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    propyle, puis purifié et distillé onze fois. Toutes les fractions étudiées avaient des propriétés retiré par distillation fractionnée - par MM. Young et Thomas - d'un produit qualifié « pentane » prove- nant de la distillation du pétrole d'Amérique. Le point d'ébullition ramené à 760 millimètres est 36

  9. NEW VIEW of the young earth covered in oceans of liquid water as early as 4.4 billion years ago

    E-Print Network [OSTI]

    Carlson, Anders

    sun. Averaging 75 times the speed of sound, each impactor scorched the surface--shattering, meltingNEW VIEW of the young earth covered in oceans of liquid water as early as 4.4 billion years ago into a crust, before continents could form, be- fore the dense, steamy atmosphere could pool as liquid water

  10. Study of Adsorption and Decomposition of H2O on Ge(100) Soon Jung Jung, Jun Young Lee, Suklyun Hong,*, and Sehun Kim*,

    E-Print Network [OSTI]

    Kim, Sehun

    Study of Adsorption and Decomposition of H2O on Ge(100) Soon Jung Jung, Jun Young Lee, Suklyun Hong Form: October 9, 2005 The adsorption and decomposition of water on Ge(100) have been investigated using results revealed two distinct adsorption features of H2O on Ge(100) corresponding to molecular adsorption

  11. 9th World Wide Workshop for Young Environmental Scientists WWW-YES-Brazil-2009: Urban waters: resource or risks? 26-30 October 2009

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    . INTRODUCTION Problem The landfilling is an attractive method for the municipal solid waste management due9th World Wide Workshop for Young Environmental Scientists WWW-YES-Brazil-2009: Urban waters problems of the urban water management in developing countries C. Madera* and Viviana Valencia

  12. 9th World Wide Workshop for Young Environmental Scientists WWW-YES-Brazil-2009: Urban waters: resource or risks? 26-30 October 2009

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    supply, sanitation and waste management facilities. Urban context of the Mingoa River watershed9th World Wide Workshop for Young Environmental Scientists WWW-YES-Brazil-2009: Urban waters on the Municipal Lake of Yaoundé, Cameroon Marielle Naah* *Laboratoire Eau Environnement et Systèmes Urbains (LEESU

  13. Mon. Not. R. Astron. Soc. 320, 131138 (2001) Discs and the 10-mm silicate spectra of young stellar objects with non-

    E-Print Network [OSTI]

    Bowey, Janet

    Mon. Not. R. Astron. Soc. 320, 131±138 (2001) Discs and the 10-mm silicate spectra of young stellar and Taurus-Elias 7 (Haro6-10, GV Tau) is distinguished from foreground silicate absorption using a simple that of Elias 7 is optically thick. We suggest that HL Tau's optically thin component arises from silicate dust

  14. Principles Governing the Pursuit of Externally Sponsored Research at BYU Brigham Young University encourages faculty to seek external funding in support of their scholarly work.

    E-Print Network [OSTI]

    Hart, Gus

    imposed no limit to the amount of external research funding that can be accepted. However, the universityPrinciples Governing the Pursuit of Externally Sponsored Research at BYU Brigham Young University encourages faculty to seek external funding in support of their scholarly work. The Board of Trustees has

  15. 9th World Wide Workshop for Young Environmental Scientists WWW-YES-Brazil-2009: Urban waters: resource or risks? 26-30 October 2009

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    director plans. Keywords Management; decision support systems; sustainable development; geopolitics; social9th World Wide Workshop for Young Environmental Scientists WWW-YES-Brazil-2009: Urban waters: resource or risks? 26-30 October 2009 Brazilian Regulatory Process: including groundwater in urban water

  16. 8th World Wide Workshop for Young Environmental Scientists WWW-YES 2009: Urban waters: resource or risks? 2-5 June 2009

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    that cross the urban-rural divide. Also, an easy-to use model can support decision making at the local urban water planning and policy level. This paper describes ongoing research on the urban water system8th World Wide Workshop for Young Environmental Scientists WWW-YES 2009: Urban waters: resource

  17. 8th World Wide Workshop for Young Environmental Scientists WWW-YES-2008: Urban waters: resource or risks? 13-16 May 2008

    E-Print Network [OSTI]

    Boyer, Edmond

    consequence of water lack is unhealthy. Water-borne diseases caused by pathogen agents appear in this city so endemic. Keywords lack, pathogens, quality, water borne disease, water supply, well INTRODUCTION8th World Wide Workshop for Young Environmental Scientists WWW-YES-2008: Urban waters: resource

  18. MAKING THE MOST OF YOUR INTERNSHIP Network. As a young professional, your main interest should be meeting people who can provide you with

    E-Print Network [OSTI]

    Arnold, Jonathan

    MAKING THE MOST OF YOUR INTERNSHIP Network. As a young professional, your main interest should internship. Be professional. Arrive at work on time (preferably a few minutes early) and resist questions. Always remember that an internship is a learning experience for you. While the employer expects

  19. International Mobility Program for Young Researchers from India and Nepal In order to strengthen the relationship and cooperation with India and Nepal, and taking into

    E-Print Network [OSTI]

    Cesare, Bernardo

    1 International Mobility Program for Young Researchers from India and Nepal In order to strengthen the relationship and cooperation with India and Nepal, and taking into account the successful research activities-border research collaboration with advanced research groups coming from India and Nepal. The program offers 8

  20. International Mobility Program for Young Researchers from India and Nepal In order to strengthen the relationship and cooperation with India and Nepal, and taking into

    E-Print Network [OSTI]

    Schenato, Luca

    International Mobility Program for Young Researchers from India and Nepal In order to strengthen the relationship and cooperation with India and Nepal, and taking into account the successful research activities-border research collaboration with advanced research groups coming from India and Nepal. The program offers 4

  1. International Mobility Program for Young Researchers from India and Nepal In order to strengthen the relationship and cooperation with India and Nepal, and taking into account

    E-Print Network [OSTI]

    Schenato, Luca

    International Mobility Program for Young Researchers from India and Nepal In order to strengthen the relationship and cooperation with India and Nepal, and taking into account the successful research activities-border research collaboration with advanced research groups coming from India and Nepal. The program offers 8

  2. International Workshop of Young Doctors in Geomechanics -W(H)YDOC 08 Pereira, De Gennaro & Delage (eds) 2008, Ecole des Ponts ParisTech, Champs-sur-Marne

    E-Print Network [OSTI]

    Boyer, Edmond

    fracturing. This phenomenon is important in petroleum engineering where the reservoir rock and the well3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 Pereira, De Gennaro engineering for radioactive (exothermal) waste disposal in deep clay geological formations as well

  3. Lyapunov instability of rigid diatomic molecules in three dimensions Young-Han Shin, Dong-Chul Ihm, and Eok-Kyun Lee

    E-Print Network [OSTI]

    Lee, EokKyun

    Lyapunov instability of rigid diatomic molecules in three dimensions Young-Han Shin, Dong-Chul Ihm June 2001; published 24 September 2001 We study the Lyapunov instability of a three-dimensional fluid and angular variables for the configura- tional space variables. The spectra of Lyapunov exponents

  4. ENVIRONMENTAL REVIEW FOR CATEGORICAL EXCLUSION DETERMINATION

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

    Archer-Cheyetme South (ARH-CH S) and Archer- Cheyenne North (ARH-CH N) 115-kV Transmission Lines. Cheyenne Light, Fuel, and Power (CLFP), a subsidiary of Black Hills Power...

  5. ENVIRONMENTAL REVIEW FOR CATEGORICAL EXCLUSION DETERMINATION

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

    the Archer-Cheyenne South (ARH-CH S) and Archer-Cheyenne North (ARH-CH N) 115-kV Transmission Lines. The structures were identified as deficient and in need of replacement by...

  6. BRIGHAM YOUNG UNIVERSITY BRIGHAM YOUNG UNIVERSITY

    E-Print Network [OSTI]

    Seamons, Kent E.

    Intosh, Wade E. Miller, Kenneth L. Stadtman, David D. Gillette Sedimentology of a Ceratosaurus Site in the San

  7. 1 Member Raoul Adamchak University of California Davis Agriculture Lecture 2 Member Jeffrey Amthor US DOE, Climate and Environmental Sceiences Div Agriculture Room A

    E-Print Network [OSTI]

    Corr Archer Daniels Midland Co. Energy Lecture 3 Member Matthew Frome Solazyme Energy Room B 4 Member

  8. Spectroscopy of Photovoltaic Materials: Charge-Transfer Complexes and Titanium Dioxide

    E-Print Network [OSTI]

    Dillon, Robert

    2013-01-01T23:59:59.000Z

    Clean Electricity From Photovoltaics ; Archer, M. D. , Hill,1 1.1 Introduction to Photovoltaics andPhotovoltaics.

  9. Prevalence of persistent cough and phlegm in young adults in relation to long-term ambient sulfur oxide exposure

    SciTech Connect (OSTI)

    Chapman, R.S.; Calafiore, D.C.; Hasselblad, V.

    1985-01-01T23:59:59.000Z

    In early 1976, a survey of persistent co gh and plegma (PCP) prevalence was conducted in 5623 young adults in four Utah communities. Over the previous five years, community specific mean sulfur dioxide levels had been 11, 18, 36, and 115 ug/mT. Corresponding mean suspended sulfate levels had been 5, 7, 8, and 14 g/mT No intercommunity exposure gradient of total suspended particulates or suspended nitrates was observed. In mothers, PCP prevalence among non-smokers was 4.2% in the high-exposure community and about 2.0% in all other communities. In smoking mothers, PCP prevalence was 21.8% in the high-exposure community and about 15.0% elsewhere. In fathers, PCP prevalence among non-smokers was about 8.0% in the high-exposure community and averaged about 3.0% elsewhere. In smoking fathers, PCP prevalence was less strongly associated with sulfur oxide exposure. PCP prevalence rates estimated in a categorical logistic regression model were qualitatively consistent with the prevalences presented above.

  10. Three-Dimensional Radiation-Hydrodynamics Calculations of the Envelopes of Young Planets Embedded in Protoplanetary Disks

    E-Print Network [OSTI]

    D'Angelo, Gennaro

    2013-01-01T23:59:59.000Z

    We perform global three-dimensional (3-D) radiation-hydrodynamics calculations of the envelopes surrounding young planetary cores of 5, 10, and 15 Earth masses, located in a protoplanetary disk at 5 and 10 AU from a solar-mass star. We apply a nested-grid technique to resolve the thermodynamics of the disk at the orbital-radius length scale and that of the envelope at the core-radius length scale. The gas is modeled as a solar mixture of molecular and atomic hydrogen, helium, and their ions. The equation of state accounts for both gas and radiation, and gas energy includes contributions from rotational and vibrational states of molecular hydrogen and from ionization of atomic species. Dust opacities are computed from first principles, applying the full Mie theory. One-dimensional (1-D) calculations of planet formation are used to supplement the 3-D calculations by providing energy deposition rates in the envelope due to solids accretion. We compare 1-D and 3-D envelopes and find that masses and gas accretion ...

  11. Associations of water and methanol masers at milli-arcsec angular resolution in two high-mass young stellar objects

    E-Print Network [OSTI]

    C. Goddi; L. Moscadelli; A. Sanna; R. Cesaroni; V. Minier

    2006-10-16T23:59:59.000Z

    Most previous high-angular (methanol masers. While high-angular resolution observations have clarified that water masers originate from shocks associated with protostellar jets, different environments have been proposed in several sources to explain the origin of methanol masers. Tha aim of the paper is to investigate the nature of the methanol maser birthplace in SFRs and the association between the water and methanol maser emission in the same young stellar object. We have conducted phase-reference Very Long Baseline Interferometry (VLBI) observations of water and methanol masers toward two high-mass SFRs, Sh 2-255 IR and AFGL 5142. In Sh 2-255 IR water masers are aligned along a direction close to the orientation of the molecular outflow observed on angular scales of 1-10 arcsec, tracing possibly the disk-wind emerging from the disk atmosphere. In AFGL 5142 water masers trace expansion at the base of a protostellar jet, whilst methanol masers are more probably tracing infalling than outflowing gas. The results for AFGL 5142 suggest that water and methanol masers trace different kinematic structures in the circumstellar gas.

  12. A multi-transition molecular line study of candidate massive young stellar objects associated with methanol masers

    E-Print Network [OSTI]

    M. Szymczak; A. Bartkiewicz; A. M. S. Richards

    2007-04-10T23:59:59.000Z

    We characterize the molecular environment of candidate massive young stellar objects (MYSOs) signposted by methanol masers. Single pixel observations of 10 transitions of HCO^+, CO and CS isotopomers were carried out, using the IRAM 30m telescope. We studied a sample of 28 targets for which the 6.7GHz maser emission positions are known with a sub-arcsecond accuracy. The systemic velocity inferred from the optically thin lines agrees within 3km/s with the central velocity of the maser emission for most of the sources. About 64% of the sources show line wings in one or more transitions of CO, HCO^+ and CS species, indicating the presence of molecular outflows. Comparison of the widths of line wings and methanol maser emission suggests that the 6.7GHz maser line traces the environment of MYSO of various kinematic regimes. Therefore conditions conducive for the methanol maser can exist in the inner parts of molecular clouds or circumstellar discs as well as in the outer parts associated with molecular outflows. Calculations of the physical conditions based on the CO and HCO^+ lines and the CS line intensity ratios refine the input parameters for maser models.

  13. A Braking Index for the Young, High-Magnetic-Field, Rotation-Powered Pulsar in Kes 75

    E-Print Network [OSTI]

    Margaret A. Livingstone; Victoria M. Kaspi; E. V. Gotthelf; Lucien Kuiper

    2006-04-21T23:59:59.000Z

    We present the first phase-coherent measurement of a braking index for the young, energetic rotation-powered pulsar PSR J1846-0258. This 324 ms pulsar is located at the center of the supernova remnant Kes 75 and has a characteristic age of tau_c = 723 years, a spin-down energy of 8.3x10^{36}erg/s, and inferred magnetic field of 4.9x10^{13} G. Two independent phase-coherent timing solutions are derived which together span 5.5 yr of data obtained with the Rossi X-ray Timing Explorer. In addition, a partially phase-coherent timing analysis confirms the fully phase-coherent result. The measured value of the braking index, n=2.65+/-0.01, is significantly less than 3, the value expected from magnetic dipole radiation, implying another physical process must contribute to the pulsar's rotational evolution. Assuming the braking index has been constant since birth, we place an upper limit on the spin-down age of J1846-0258 of 884 yr, the smallest age estimate of any rotation-powered pulsar.

  14. Sowing the seeds of massive black holes in small galaxies: Young clusters as the building blocks of ultracompact dwarf galaxies

    SciTech Connect (OSTI)

    Amaro-Seoane, Pau [Max Planck Institut für Gravitationsphysik (Albert-Einstein-Institut), D-14476 Potsdam (Germany); Konstantinidis, Symeon [Astronomisches Rechen-Institut, Zentrum für Astronomie, Universität Heidelberg, Mönchhofstraße 12-14, Heidelberg D-69120 (Germany); Freitag, Marc Dewi [Institute of Astronomy, Madingley Road, CB3 0HA Cambridge (United Kingdom); Coleman Miller, M. [Department of Astronomy and Joint Space-Science Institute, University of Maryland, College Park, MD 20742-2421 (United States); Rasio, Frederic A., E-mail: Pau.Amaro-Seoane@aei.mpg.de, E-mail: simos@ari.uni-heidelberg.de, E-mail: marc.freitag@gmail.com, E-mail: miller@astro.umd.edu, E-mail: rasio@northwestern.edu [Department of Physics and Astronomy, and Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA), Northwestern University, Evanston, IL 60208 (United States)

    2014-02-20T23:59:59.000Z

    Interacting galaxies often have complexes of hundreds of young stellar clusters of individual masses ?10{sup 4}-10{sup 6} M {sub ?} in regions that are a few hundred parsecs across. These cluster complexes interact dynamically, and their coalescence is a candidate for the origin of some ultracompact dwarf galaxies. Individual clusters with short relaxation times are candidates for the production of intermediate-mass black holes of a few hundred solar masses, via runaway stellar collisions prior to the first supernovae in a cluster. It is therefore possible that a cluster complex hosts multiple intermediate-mass black holes that may be ejected from their individual clusters due to mergers or binary processes, but bound to the complex as a whole. Here we explore the dynamical interaction between initially free-flying massive black holes and clusters in an evolving cluster complex. We find that, after hitting some clusters, it is plausible that the massive black hole will be captured in an ultracompact dwarf forming near the center of the complex. In the process, the hole typically triggers electromagnetic flares via stellar disruptions, and is also likely to be a prominent source of gravitational radiation for the advanced ground-based detectors LIGO and VIRGO. We also discuss other implications of this scenario, notably that the central black hole could be considerably larger than expected in other formation scenarios for ultracompact dwarfs.

  15. Treatment duration and time since disturbance affect vegetation development in a young California red fir plantation. Forest Service research paper

    SciTech Connect (OSTI)

    McDonald, P.M.; Fiddler, G.O.

    1997-06-01T23:59:59.000Z

    The density and development of greenleaf manzanita, snowbrush, goldenbush (rabbitbrush), and graminoids were evaluated in a young California red fir plantation in northern California from 1986 through 1995. Manual grubbing and herbicides created treatments regimes that lasted for 3 to 6 years and vegetation recovery times of 4 to 10 years. The duration and timing of the grubbing and spraying operations constituted the treatments. Species response was mixed: greenleaf manzanita had higher average values of density, foliar cover, and height when time since disturbance was longest, snowbrush density was lowest but cover and height were highest, and values for goldenbrush and graminoids in general showed no trend. In the control at the end of the study, graminoids numbered 82,350 per acre, greenleaf manzanita 10,850, goldenbrush 10,800, and snowbrush 1,850 plants per acre. Foliar cover of manzanita at 7,300 square feet per acre was more than that of all other naturally estblished species combined. Survival of red fir over all teatments after one growing season was 98 percent and after 10 seasons was 89 percent. Average height of red fir seedlings ranged from 3.2 feet with intensive release to 1.7 feet with no release. No release allowed greenleaf manzanita plants to be slightly taller than red fir seedlings and to place the seedlings in danger of being overtopped.

  16. Dynamics of stellar black holes in young star clusters with different metallicities - II. Black hole-black hole binaries

    E-Print Network [OSTI]

    Brunetto Marco Ziosi; Michela Mapelli; Marica Branchesi; Giuseppe Tormen

    2014-05-20T23:59:59.000Z

    In this paper, we study the formation and dynamical evolution of black hole-black hole (BH-BH) binaries in young star clusters (YSCs), by means of N-body simulations. The simulations include metallicity-dependent recipes for stellar evolution and stellar winds, and have been run for three different metallicities (Z = 0.01, 0.1 and 1 Zsun). Following recent theoretical models of wind mass-loss and core-collapse supernovae, we assume that the mass of the stellar remnants depends on the metallicity of the progenitor stars. We find that BH-BH binaries form efficiently because of dynamical exchanges: in our simulations, we find about 10 times more BH-BH binaries than double neutron star binaries. The simulated BH-BH binaries form earlier in metal-poor YSCs, which host more massive black holes (BHs) than in metal-rich YSCs. The simulated BH-BH binaries have very large chirp masses (up to 80 Msun), because the BH mass is assumed to depend on metallicity, and because BHs can grow in mass due to the merger with stars. The simulated BH-BH binaries span a wide range of orbital periods (10^-3-10^7 yr), and only a small fraction of them (0.3 per cent) is expected to merge within a Hubble time. We discuss the estimated merger rate from our simulations and the implications for Advanced VIRGO and LIGO.

  17. DENSE IRON EJECTA AND CORE-COLLAPSE SUPERNOVA EXPLOSION IN THE YOUNG SUPERNOVA REMNANT G11.2-0.3

    SciTech Connect (OSTI)

    Moon, Dae-Sik [Department of Astronomy and Astrophysics, University of Toronto, Toronto, ON M5S 3H4 (Canada); Koo, Bon-Chul; Seok, Ji Yeon [School of Physics and Astronomy, Seoul National University, Seoul, 151-742 (Korea, Republic of); Lee, Ho-Gyu [Department of Astronomy, Graduate School of Science, The University of Tokyo, Bunkyo-ku, Tokyo, 113-0033 (Japan); Matthews, Keith [Division of Physics, Mathematics and Astronomy, California Institute of Technology, MS 320-47, Pasadena, CA 91125 (United States); Lee, Jae-Joon [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Pyo, Tae-Soo; Hayashi, Masahiko, E-mail: moon@astro.utoronto.c [Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI 96720 (United States)

    2009-09-20T23:59:59.000Z

    We present the results of near-infrared spectroscopic observations of dense ({approx}>10{sup 3} cm{sup -3}) iron ejecta in the young core-collapse supernova remnant G11.2-0.3. Five ejecta knots projected to be close to its center show a large dispersion in their Doppler shifts: two knots in the east are blueshifted by more than 1000 km s{sup -1}, while three western knots have relatively small blueshifts of 20-60 km s{sup -1}. This velocity discrepancy may indicate that the western knots have been significantly decelerated or that there exists a systematic velocity difference among the knots. One ejecta filament in the northwestern boundary, on the other hand, is redshifted by {approx}>200 km s{sup -1}, while opposite filament in the southeastern boundary shows a negligible radial motion. Some of the knots and filaments have secondary velocity components, and one knot shows a bow shock-like feature in the velocity structure. The iron ejecta appear to be devoid of strong emission from other heavy elements, such as S, which may attest to the alpha-rich freezeout process in the explosive nucleosynthesis of the core-collapse supernova explosion close to its center. The prominent bipolar distribution of the Fe ejecta in the northwestern and southeastern direction, along with the elongation of the central pulsar wind nebula in the perpendicular direction, is consistent with the interpretation that the supernova exploded primarily along the northwestern and southeastern direction.

  18. Fermi-LAT Discovery of GeV Gamma-ray Emission from the Young Supernova Remnant Cassiopeia A

    SciTech Connect (OSTI)

    Abdo, A.A.

    2011-08-19T23:59:59.000Z

    We report on the first detection of GeV high-energy gamma-ray emission from a young supernova remnant with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope. These observations reveal a source with no discernible spatial extension detected at a significance level of 12.2{sigma} above 500 MeV at a location that is consistent with the position of the remnant of the supernova explosion that occurred around 1680 in the Cassiopeia constellation - Cassiopeia A. The gamma-ray flux and spectral shape of the source are consistent with a scenario in which the gamma-ray emission originates from relativistic particles accelerated in the shell of this remnant. The total content of cosmic rays (electrons and protons) accelerated in Cas A can be estimated as W{sub CR} {approx_equal} (1-4) x 10{sup 49} erg thanks to the well-known density in the remnant assuming that the observed gamma-ray originates in the SNR shell(s). The magnetic field in the radio-emitting plasma can be robustly constrained as B {ge} 0.1 mG, providing new evidence of the magnetic field amplification at the forward shock and the strong field in the shocked ejecta.

  19. The young low-mass star ISO-Oph-50: Extreme variability induced by a clumpy, evolving circumstellar disk

    E-Print Network [OSTI]

    Scholz, Aleks; Geers, Vincent

    2015-01-01T23:59:59.000Z

    ISO-Oph-50 is a young low-mass object in the ~Myr old Ophiuchus star forming region undergoing dramatic changes in its optical/near/mid-infrared brightness by 2-4 mag. We present new multi-band photometry and near-infrared spectra, combined with a synopsis of the existing literature data. Based on the spectroscopy, the source is confirmed as a mid M dwarf, with evidence for ongoing accretion. The near-infrared lightcurves show large-scale variations, with 2-4 mag amplitude in the bands IJHK, with the object generally being bluer when faint. Near its brightest state, the object shows colour changes consistent with variable extinction of dAV~7 mag. High-cadence monitoring at 3.6mu reveals quasi-periodic variations with a typical timescale of 1-2 weeks. The best explanation for these characteristics is a low-mass star seen through circumstellar matter, whose complex variability is caused by changing inhomogeneities in the inner parts of the disk. When faint, the direct stellar emission is blocked; the near-infra...

  20. APEX-CHAMP+ high-J CO observations of low-mass young stellar objects: IV. Mechanical and radiative feedback

    E-Print Network [OSTI]

    Y?ld?z, Umut A; van Dishoeck, Ewine F; Hogerheijde, Michiel R; Karska, Agata; Belloche, Arnaud; Endo, Akira; Frieswijk, Wilfred; Güsten, Rolf; van Kempen, Tim A; Leurini, Silvia; Nagy, Zsofia; Pérez-Beaupuits, Juan-Pablo; Risacher, Christophe; van der Marel, Nienke; van Weeren, Reinout J; Wyrowski, Friedrich

    2015-01-01T23:59:59.000Z

    During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes. Our aim is to quantify the feedback, mechanical and radiative, for a large sample of low-mass sources. The outflow activity is compared to radiative feedback in the form of UV heating by the accreting protostar to search for correlations and evolutionary trends. Large-scale maps of 26 young stellar objects, which are part of the Herschel WISH key program are obtained using the CHAMP+ instrument on the APEX (12CO and 13CO 6-5), and the HARP-B instrument on the JCMT (12CO and 13CO 3-2). Maps are used to determine outflow parameters and envelope models are used to quantify the amount of UV-heated gas and its temperature from 13CO 6-5 observations. All sources in our sample show outflow activity and the outflow force, F_CO, is larger for Class 0 sources than for Class I sources, even if their luminosities are comparable. The outflowing gas typically extends to much greater ...

  1. Detection of a Second Optical Component in the HI cloud associated with the Young Dwarf Galaxy SBS 0335-052: New Data from the 6--m Telescope

    E-Print Network [OSTI]

    S. A. Pustilnik; V. A. Lipovetsky; Yu. I. Izotov; E. Brinks; T. X. Thuan; A. Yu. Kniazev; S. I. Neizvestny; A. V. Ugryumov

    1996-06-04T23:59:59.000Z

    The Blue Compact Dwarf (BCD) galaxy SBS 0335--052 is one of the most metal--deficient galaxies known and one of the best candidates for a young dwarf galaxy in the process of formation. A VLA HI map reveals an unusual structure: the neutral gas is distributed in a very extended disk, about 15 times larger than the Holmberg optical diameter of the BCG. There are two peaks of high density. The eastern peak is close to the position of SBS 0335--052 whereas the western HI peak is associated with a faint compact optical galaxy. A 6--m telescope spectrum of this object shows Halpha, Hbeta, and [OIII] 5007 emission with a redshift close to that of SBS 0335--052. We suggest that it may be a young and chemically unevolved dwarf galaxy.

  2. The young's modulus of 1018 steel and 67061-T6 aluminum measured from quasi-static to elastic precursor strain-rates

    SciTech Connect (OSTI)

    Rae, Philip J [Los Alamos National Laboratory; Trujillo, Carl [Los Alamos National Laboratory; Lovato, Manuel [Los Alamos National Laboratory

    2009-01-01T23:59:59.000Z

    The assumption that Young's modulus is strain-rate invariant is tested for 6061-T6 aluminium alloy and 1018 steel over 10 decades of strain-rate. For the same billets of material, 3 quasi-static strain-rates are investigated with foil strain gauges at room temperature. The ultrasonic sound speeds are measured and used to calculate the moduli at approximately 10{sup 4} s{sup -1}. Finally, ID plate impact is used to generate an elastic pre-cursor in the alloys at a strain-rate of approximately 10{sup 6} s{sup -1} from which the longitudinal sound speed may be obtained. It is found that indeed the Young's modulus is strain-rate independent within the experimental accuracy.

  3. Electron microscopic observations of the adrenal cortical cells of young albino rats after near-lethal doses of chronic gamma irradiation

    E-Print Network [OSTI]

    Riggs, James C

    1968-01-01T23:59:59.000Z

    8. Section of normal spongiocyte indicating the position of an endothelial cell io relation to cortical cells 31 9. Cortical cells from an irradiated animal 33 10. Tubular cristae mitochondriales from an irradiated animal 35 11. Vacuolatioo...ELECTRON MICROSCOPIC OBSERVATIONS OP THE ADRENAL CORTICAL CELLS OF YOUNG ALBINO RATS AFTER NEAR-LETHAL DOSES OP CHRONIC GAK'IA IRRADIATION A Thesis by JAMES CRAIG RIGGS Submitted to the Graduate College of the Texas A&M University...

  4. Determination of Young's modulus, shear modulus and mechanical damping as a function of temperature and microstructure for Uranium-2wt% Molybdenum using the PUCOT

    E-Print Network [OSTI]

    Varughese, Joseph Verghese

    1988-01-01T23:59:59.000Z

    Verghese Varughese, B. S. , Texas A&M University Chairman of Advisory Committee: Dr. Alan Wolfenden A research program has been completed at Texas A&M University in which dynamic Young's and shear modulus measurements were made for depleted Uranium-2wt... INTRODUCTION The need for mankind to utilize his abundant natural resources has led him to numerous research programs with depleted uranium. Depleted uranium ( U-238 ) is a by-product of the nuclear industry. Natural uranium contains about 0. 7...

  5. The PUCOT for measuring dynamic Young's modulus for the B?-CoAl, FeAl and NiAl alloys 

    E-Print Network [OSTI]

    Harmouche, Mahmoud Redwan

    1984-01-01T23:59:59.000Z

    friction contemporaneously. Using this apparatus, dynamic Young's modulus for the B2 polycrystalline CoA1 intermetallic compounds was measured in the composition in- terval 48. 49 to 52. 28 atomic % Co and temperature interval 298 to 1303 K. Also... to exploit advanced material processing concepts for similar goals; and (3) On a higher-risk, long-term basis, identification of alternative materials with no strategic element contents. " To cater to such objectives, intermetallic compounds...

  6. Measurement of the Young's modulus and internal friction of single crystal and polycrystalline copper, and copper-graphite composites as a function of temperature and orientation 

    E-Print Network [OSTI]

    Wickstrom, Steven Norman

    1988-01-01T23:59:59.000Z

    MEASUREMENT OF THE YOUNG'S MODULUS AND INTERNAL FRICTION OF SINGLE CRYSTAL AND POLYCRYSTALLINE COPPER, AND COPPER- GRAPHITE COMPOSITES AS A FUNCTION OF TEMPERATURE AND ORIENTATION A Thesis by S teven Norman Wicks trom Submitted... AND POLYCRYSTALLINE COPPER, AND COPPER- GRAPHITE COMPOSITES AS A FUNCTION OF TEMPERATURE AND ORIENTATION A Thesis by Steven Norman Wickstrom Approved as to style and content by: A(J ~a Alan Wolfenden (Chairman of Committee) Don E. Bray (Member) Donald G...

  7. Search for associations containing young stars (SACY). VI. Is multiplicity universal? Stellar multiplicity in the range 3-1000 au from adaptive-optics observations

    E-Print Network [OSTI]

    Elliott, P; Bouy, H; Bayo, A; Melo, C H F; Torres, C A O; Sterzik, M F; Quast, G R; Chauvin, G; Barrado, D

    2015-01-01T23:59:59.000Z

    Context. Young loose nearby associations are unique samples of close (optics assisted near-infrared observations with NACO (ESO/VLT) and IRCAL (Lick Observatory) for at least one epoch of all 113 SACY members. We have identified multiple systems using co-moving proper-motion analysis and using contamination estimates. We have explored ranges in projected separation and mass-ratio of a [3-1000 au], and ...

  8. On the representation of the diffracted field of Hermite-Gaussian modes in an alien basis and the young diffraction principle

    SciTech Connect (OSTI)

    Smirnov, V.N.; Strokovskii, G.A. [St. Petersburg State Univ. (Russian Federation)

    1994-10-01T23:59:59.000Z

    An analytical form of expansion coefficients of a diffracted field for an arbitrary Hermite-Gaussian beam in an alien Hermite-Gaussian basis is obtained. A possible physical interpretation of the well-known Young phenomenological diffraction principle and experiments on diffraction of Hermite-Gaussian beams of the lowest types (n = 0 - 5) from half-plane are discussed. The case of nearly homogenous expansion corresponding to misalignment and mismatch of optical systems is also analyzed. 7 refs., 2 figs.

  9. Experiences and perceptions of mothers of young people with and without additional support needs and autistic spectrum disorder in relation to behaviour, maternal stress, access to services and family quality of life 

    E-Print Network [OSTI]

    Moffat, Vivien Jane

    2007-01-01T23:59:59.000Z

    This research explores experiences and perceptions of mothers of adolescents and young adults (13-22yrs) with Additional Support Needs (ASN) in relation to stress, service provision and family and individual Quality of ...

  10. Fault Restoration and Spare Capacity Allocation with QoS Constraints for MPLS Networks

    E-Print Network [OSTI]

    Chen, Thomas M.

    Engineering SMU SMU PO Box 750338 PO Box 750122 Dallas, TX 75275 Dallas, TX 75275 Abstract-- This paper

  11. 64-esimo Corso di Orientamento Universitario Scuola Normale Superiore

    E-Print Network [OSTI]

    Abbondandolo, Alberto

    ;1. Si "ricreano le condizioni del big bang" Dalla termodinamica del "forno cosmico": =(T) t=t(T) Dalla

  12. Elm Fork of the Trinity River Floodplain Management Study

    E-Print Network [OSTI]

    Tickle, Greg; Clary, Melinda

    2001-01-01T23:59:59.000Z

    ELM FORK OF THE TRINITY RIVER FLOODPLAIN MANAGEMENT STUDYof the Elm Fork of the Trinity River, Dallas County, Dallas,

  13. THE GEMINI/NICI PLANET-FINDING CAMPAIGN: THE FREQUENCY OF PLANETS AROUND YOUNG MOVING GROUP STARS

    SciTech Connect (OSTI)

    Biller, Beth A.; Ftaclas, Christ [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69115 Heidelberg (Germany); Liu, Michael C.; Wahhaj, Zahed; Nielsen, Eric L. [Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822 (United States); Hayward, Thomas L.; Hartung, Markus [Gemini Observatory, Southern Operations Center, c/o AURA, Casilla 603, La Serena (Chile); Males, Jared R.; Skemer, Andrew; Close, Laird M. [Steward Observatory, University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); Chun, Mark [Institute for Astronomy, 640 North Aohoku Place, 209, Hilo, HI 96720-2700 (United States); Clarke, Fraser; Thatte, Niranjan [Department of Astronomy, University of Oxford, DWB, Keble Road, Oxford OX1 3RH (United Kingdom); Shkolnik, Evgenya L. [Lowell Observatory, 1400 West Mars Hill Road Flagstaff, AZ 86001 (United States); Reid, I. Neill [Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218 (United States); Boss, Alan [Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015 (United States); Lin, Douglas [Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064 (United States); Alencar, Silvia H. P. [Departamento de Fisica-ICEx-Universidade Federal de Minas Gerais, Av. Antonio Carlos 6627, 30270-901 Belo Horizonte, MG (Brazil); De Gouveia Dal Pino, Elisabete; Gregorio-Hetem, Jane [Universidade de Sao Paulo, IAG/USP, Departamento de Astronomia, Rua do Matao 1226, 05508-900 Sao Paulo, SP (Brazil); and others

    2013-11-10T23:59:59.000Z

    We report results of a direct imaging survey for giant planets around 80 members of the ? Pic, TW Hya, Tucana-Horologium, AB Dor, and Hercules-Lyra moving groups, observed as part of the Gemini/NICI Planet-Finding Campaign. For this sample, we obtained median contrasts of ?H = 13.9 mag at 1'' in combined CH{sub 4} narrowband ADI+SDI mode and median contrasts of ?H = 15.1 mag at 2'' in H-band ADI mode. We found numerous (>70) candidate companions in our survey images. Some of these candidates were rejected as common-proper motion companions using archival data; we reobserved with Near-Infrared Coronagraphic Imager (NICI) all other candidates that lay within 400 AU of the star and were not in dense stellar fields. The vast majority of candidate companions were confirmed as background objects from archival observations and/or dedicated NICI Campaign followup. Four co-moving companions of brown dwarf or stellar mass were discovered in this moving group sample: PZ Tel B (36 ± 6 M{sub Jup}, 16.4 ± 1.0 AU), CD–35 2722B (31 ± 8 M{sub Jup}, 67 ± 4 AU), HD 12894B (0.46 ± 0.08 M{sub ?}, 15.7 ± 1.0 AU), and BD+07 1919C (0.20 ± 0.03 M{sub ?}, 12.5 ± 1.4 AU). From a Bayesian analysis of the achieved H band ADI and ASDI contrasts, using power-law models of planet distributions and hot-start evolutionary models, we restrict the frequency of 1-20 M{sub Jup} companions at semi-major axes from 10-150 AU to <18% at a 95.4% confidence level using DUSTY models and to <6% at a 95.4% using COND models. Our results strongly constrain the frequency of planets within semi-major axes of 50 AU as well. We restrict the frequency of 1-20 M{sub Jup} companions at semi-major axes from 10-50 AU to <21% at a 95.4% confidence level using DUSTY models and to <7% at a 95.4% using COND models. This survey is the deepest search to date for giant planets around young moving group stars.

  14. A SPITZER SURVEY OF PROTOPLANETARY DISK DUST IN THE YOUNG SERPENS CLOUD: HOW DO DUST CHARACTERISTICS EVOLVE WITH TIME?

    SciTech Connect (OSTI)

    Oliveira, Isa; Van Dishoeck, Ewine F.; Lahuis, Fred [Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden (Netherlands); Pontoppidan, Klaus M. [California Institute of Technology, Division for Geological and Planetary Sciences, MS 150-21, Pasadena, CA 91125 (United States); MerIn, Bruno [Herschel Science Center, European Space Agency (ESA), P.O. Box 78, 28691 Villanueva de la Canada (Madrid) (Spain); Geers, Vincent C. [University of Toronto, 50 St. George St., Toronto, ON M5R 2W9 (Canada); Joergensen, Jes K. [Centre for Star and Planet Formation, Natural History Museum of Denmark, University of Copenhagen, Oester Voldgade 5-7, DK-1350 Copenhagen (Denmark); Olofsson, Johan; Augereau, Jean-Charles [Laboratoire d'Astrophysique de Grenoble, Universite Joseph Fourier, CNRS, UMR 5571, Grenoble (France); Brown, Joanna M., E-mail: oliveira@strw.leidenuniv.n [Max-Planck Institut fuer Extraterrestrische Physik, Giessenbachstrasse 1, 85748 Garching (Germany)

    2010-05-01T23:59:59.000Z

    We present Spitzer InfraRed Spectrograph (IRS) mid-infrared (5-35 {mu}m) spectra of a complete flux-limited sample ({>=}3 mJy at 8 {mu}m) of young stellar object (YSO) candidates selected on the basis of their infrared colors in the Serpens Molecular Cloud. Spectra of 147 sources are presented and classified. Background stars (with slope consistent with a reddened stellar spectrum and silicate features in absorption), galaxies (with redshifted polycyclic aromatic hydrocarbon (PAH) features), and a planetary nebula (with high ionization lines) amount to 22% of contamination in this sample, leaving 115 true YSOs. Sources with rising spectra and ice absorption features, classified as embedded Stage I protostars, amount to 18% of the sample. The remaining 82% (94) of the disk sources are analyzed in terms of spectral energy distribution shapes, PAHs, and silicate features. The presence, strength, and shape of these silicate features are used to infer disk properties for these systems. About 8% of the disks have 30/13 {mu}m flux ratios consistent with cold disks with inner holes or gaps, and 3% of the disks show PAH emission. Comparison with models indicates that dust grains in the surface of these disks have sizes of at least a few {mu}m. The 20 {mu}m silicate feature is sometimes seen in the absence of the 10 {mu}m feature, which may be indicative of very small holes in these disks. No significant difference is found in the distribution of silicate feature shapes and strengths between sources in clusters and in the field. Moreover, the results in Serpens are compared with other well-studied samples: the c2d IRS sample distributed over five clouds and a large sample of disks in the Taurus star-forming region. The remarkably similar distributions of silicate feature characteristics in samples with different environment and median ages-if significant-imply that the dust population in the disk surface results from an equilibrium between dust growth and destructive collision processes that are maintained over a few million years for any YSO population irrespective of environment.

  15. Dynamic measurements of Young's and shear moduli and mechanical damping as a function of temperature and microstructure for Uranium-6% Niobium

    E-Print Network [OSTI]

    Lowry, David Raymond

    1987-01-01T23:59:59.000Z

    in the form of fissionable U-235, while the remainder is almost entirely U-238. Because of radioactive decay, the enriched uranium is also becoming depleted uranium. The availibility of DU is estimated to have increased from 252. 5 to 433. 2 metric tons...DYNAMIC MEASUREMENTS OF YOUNG'S AND SHEAR MODULI AND MECHANICAL DAMPING AS A FUNCTION OF TEMPERATURE AND MICROSTRUCTURE FOR URANIUM-6 /o NIOBIUM A Thesis by DAVID RAYMOND LOWRY Submitted to the Graduate College of Texas A&M University...

  16. Determination of Young's modulus and mechanical damping as a function of temperature for depleted uranium-0.75 wt% titanium using the PUCOT 

    E-Print Network [OSTI]

    Keene, Keith Howard

    1986-01-01T23:59:59.000Z

    the normal background level was detected with a Geiger counter outside the tool cabinet. The main health hazard from depleted uranium is its heavy metal toxicity [3]. Depleted uranium can be lethal if sufficient amounts of finely divided dust or oxide...DETERMINATION OF YOUNG'S MODULUS AND MECHANICAL DAMPING AS A FUNCTION OF TEMPERATURE FOR DEPLETED URANIUM-0. 75 WT% TITANIUM USING THE PUCOT A Thesis bY KEITH HOWARD KEENE Submitted to the Graduate College of Texas A&M University in partial...

  17. The long term dynamics of the solar radiative zone associated to new results from SoHO and young solar analogs

    E-Print Network [OSTI]

    Sylvaine Turck-Chieze; Sebastien Couvidat; Antonio Eff-Darwich; Vincent Duez; Rafael A. Garcia; Stephane Mathis; Savita Mathur; Laurent Piau; David Salabert

    2011-09-19T23:59:59.000Z

    The Standard Solar Model (SSM) is no more sufficient to interpret all the observations of the radiative zone obtained with the SoHO satellite. We recall our present knowledge of this internal region and compare the recent results to models beyond the SSM assumptions. Then we discuss the missing processes and quantify some of them in using young analog observations to build a more realistic view of our star. This progress will be useful for solar-like stars observed by COROT and KEPLER.

  18. Trajectory-based interpretation of Young's experiment, the Arago-Fresnel laws and the Poisson-Arago spot for photons and massive particles

    E-Print Network [OSTI]

    M. Davidovic; A. S. Sanz; M. Bozic; D. Arsenovic; D. Dimic

    2013-04-02T23:59:59.000Z

    We present a trajectory based interpretation for Young's experiment, the Arago-Fresnel laws and the Poisson-Arago spot. This approach is based on the equation of the trajectory associated with the quantum probability current density in the case of massive particles, and the Poynting vector for the electromagnetic field in the case of photons. Both the form and properties of the evaluated photon trajectories are in good agreement with the averaged trajectories of single photons observed recently in Young's experiment by Steinberg's group at the University of Toronto. In the case of the Arago-Fresnel laws for polarized light, the trajectory interpretation presented here differs from those interpretations based on the concept of "which-way" (or "which-slit") information and quantum erasure. More specifically, the observer's information about the slit that photons went through is not relevant to the existence of interference; what is relevant is the form of the electromagnetic energy density and its evolution, which will model consequently the distribution of trajectories and their topology. Finally, we also show that the distributions of end points of a large number of evaluated photon trajectories are in agreement with the distributions measured at the screen behind a circular disc, clearly giving rise to the Poisson-Arago spot.

  19. INDEPENDENT TECHNICAL REVIEW OF THE BUILDING 100 PLUME, FORMER DOE PINELLAS SITE (YOUNG - RAINEY STAR CENTER), LARGO, FLORIDA

    SciTech Connect (OSTI)

    Eddy-Dilek, C.; Rossabi, J.; Amidon, M.; Riha, B.; Kaback, D.

    2010-07-30T23:59:59.000Z

    Contaminated groundwater associated with Building 100 at the Young-Rainey Science, Technology, and Research Center, formerly the DOE Pinellas plant, is the primary remedial challenge that remains to be addressed at the site. Currently, Building 100 is an active industrial facility that is now owned and operated by the Pinellas county government. Groundwater samples collected from monitoring wells recently installed near the southern boundary of the site suggest that contaminated groundwater has migrated off the plant site. In response to the challenges presented by the Building 100 plume, the Office of Legacy Management (LM) requested assistance from the DOE Office of Groundwater and Soil Remediation (EM-32) to provide a review team to make technical recommendations so that they can efficiently and effectively address characterization and remediation of the plume. The review team was unanimous in the conclusion that a dynamic strategy that combines a phased implementation of direct push samplers, sensors, and tools can be used to better delineate the extent of contamination, control plume migration, and rapidly remediate the contaminated groundwater at the site. The initial efforts of the team focused on reviewing the site history and data, organizing the information into a conceptual model, identifying appropriate technologies, and recommending an integrated strategy. The current groundwater data from the site indicate a two-lobed plume extending to the east and south. To the east vinyl chloride is the primary contaminant of concern, to the south, vinyl chloride and cis1, 2-DCE are the primary contaminants. The limited data that are available suggest that reductive dechlorination of the TCE is already occurring but is not sufficient to prevent offsite migration of low concentrations of TCE daughter products. The team recommends that DOE pursue a strategy that builds on the natural cleansing capacity of the subsurface with reductive methods including biostimulation and/or bioaugmentation to provide a sustainable remediation system within the flow path of the plume. Additional data will be required to implement this approach and will include: (1) Better delineation of the nature and extent of contamination; (2) Demonstration the plume is currently stable or shrinking; and (3) Demonstration the full reductive dechlorination is occurring. The technical team recommends that DOE use a phased approach to identify residual contamination and to provide rapid installation of remedies. Matrices of characterization and remediation sensors, technologies, and tools were developed by the team in order to match the specific conditions and requirements of the site. The team provides a specific example of remedy that includes the incorporation of a dynamic characterization strategy moving from minimally invasive to more aggressive field techniques, the consideration of multiple complementary remediation approaches based on a spatiotemporally phased approach keyed to the different demands of different parts of the plume, and the integration and sequencing of the characterization and remediation activities.

  20. Spatial dimensions of workplaces and the effects on commuting: the dase of metropolitan Dallas-Fort Worth

    E-Print Network [OSTI]

    Shin, Sangyoung

    2004-09-30T23:59:59.000Z

    Sang-Chuel Choe in Seoul National University and to Professor Yang-Choon Park in Kyungpook National University. Thanks to all not listed in this page but deserving of credits. vii TABLE OF CONTENTS Page ABSTRACT g46g46g46g46g46g46g46g46g46g46...g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g46g...