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Sample records for won young amol

  1. Distributed Graphplan Mark Iwen & Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    Distributed Graphplan Mark Iwen & Amol Dattatraya Mali Electrical Engineering & Computer Science University of Wisconsin, Milwaukee, WI 53211 iwen2724@uwm.edu, mali@miller.cs.uwm.edu, Fax: 1

  2. Marker-Augmented Robot-Environment Interaction Amol D. Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    Marker-Augmented Robot-Environment Interaction Amol D. Mali Dept. of computer science and engineering Arizona state university, Tempe, AZ 85287-5406 mali@tahoma.eas.asu.edu, Fax: 602-965-2751 Abstract

  3. On Temporal Planning as CSP Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    On Temporal Planning as CSP Amol Dattatraya Mali Electrical Engg. & Computer Science, University of Wisconsin, Milwaukee, WI 53211 mali@miller.cs.uwm.edu, Fax: 1­414­229­2769 Abstract (Appears as a regular

  4. On Temporal Planning as CSP Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    On Temporal Planning as CSP Amol Dattatraya Mali Electrical Engg. & Computer Science, University of Wisconsin, Milwaukee, WI 53211 mali@miller.cs.uwm.edu, Fax: 1-414-229-2769 Abstract (Appears as a regular

  5. On the Hybrid Propositional Plan Encodings Amol D. Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    On the Hybrid Propositional Plan Encodings #3; Amol D. Mali Dept. of Electr. Engg. & Computer Science, P.O.Box 784 University of Wisconsin, Milwaukee, WI 53201, USA. mali@miller.cs.uwm.edu, Phone: 414

  6. Refinementbased Planning As Satisfiability \\Lambda Amol D. Mali, Subbarao Kambhampati

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    Refinement­based Planning As Satisfiability \\Lambda Amol D. Mali, Subbarao Kambhampati Dept. of computer science & Engg. Arizona state university, Tempe, AZ 85287­5406. famol.mali, raog@asu.edu Abstract

  7. Towards Synthesis of Reactive & Robust Behavior Chains Amol D. Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    Towards Synthesis of Reactive & Robust Behavior Chains Amol D. Mali Electrical Engg. & Computer Science, P.O.Box 784 University of Wisconsin, Milwaukee, Milwaukee, WI 53201, USA. e-mail: mali

  8. On the Evaluation of Agent Behaviors Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    1 On the Evaluation of Agent Behaviors #3; Amol Dattatraya Mali Dept. of Electrical Engg-414-229-2769, mali@miller.cs.uwm.edu This work focuses on robot behaviors which use minimal communication and rely

  9. Enhancing HTN Planning As Satis ability Amol D. Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    Enhancing HTN Planning As Satis#12;ability Amol D. Mali Dept. of Electr. Engg. & Computer Science, University of Wisconsin, Milwaukee, WI 53211, USA. mali@miller.cs.uwm.edu, Phone: 414 - 906 - 8942 Fax: 414

  10. Hybrid Planning for Partially Hierarchical Domains Subbarao Kambhampati , Amol Mali & Biplav Srivastava

    E-Print Network [OSTI]

    Mali, Amol D.

    Hybrid Planning for Partially Hierarchical Domains Subbarao Kambhampati , Amol Mali & Biplav: frao,amol.mali,biplavg@asu.edu WWW: http://rakaposhi.eas.asu.edu/yochan.html Abstract Hierarchical task

  11. Metrics For Evaluation of Behavior-Based Robotic Systems Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    Metrics For Evaluation of Behavior-Based Robotic Systems Amol Dattatraya Mali Dept. of computer science and engg. Arizona state university, Tempe, AZ 85287-5406, USA amol.mali@asu.edu Amitabha Mukerjee

  12. Hybrid Planning for Partially Hierarchical Domains Subbarao Kambhampati \\Lambda , Amol Mali & Biplav Srivastava

    E-Print Network [OSTI]

    Mali, Amol D.

    Hybrid Planning for Partially Hierarchical Domains Subbarao Kambhampati \\Lambda , Amol Mali­5406 email: frao,amol.mali,biplavg@asu.edu WWW: http://rakaposhi.eas.asu.edu/yochan.html Abstract

  13. On Quanti ed Weighted MAX-SAT Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    On Quanti#12;ed Weighted MAX-SAT Amol Dattatraya Mali Dept. of Electrical Engg. & Computer Science, University of Wisconsin, Milwaukee, WI 53211, mali@miller.cs.uwm.edu, Phone: 1-414-229-6762, Fax: 1-414-229-2769, http://www.cs.uwm.edu/faculty/mali Abstract In this paper we introduce quanti#12;ed weighted MAX-SAT (Q

  14. On the utility of Planspace (Causal) Encodings Amol D. Mali & Subbarao Kambhampati #

    E-Print Network [OSTI]

    Mali, Amol D.

    On the utility of Plan­space (Causal) Encodings Amol D. Mali & Subbarao Kambhampati # Dept. of Computer Science & Engineering Arizona State University, Tempe, AZ 85287­5406 Email: famol.mali, raog

  15. Search Control Techniques for Planning Minh Tang and Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    Search Control Techniques for Planning Minh Tang and Amol Dattatraya Mali Electrical Engineering-414-229-2769, minhtang,mali @uwm.edu Abstract Significant advances have been made in heuristic search for classical

  16. MFSAT: A SAT Solver Using Multi-Flip Local Search Amol Dattatraya Mali & Yevgeny Lipen (*)

    E-Print Network [OSTI]

    Mali, Amol D.

    MFSAT: A SAT Solver Using Multi-Flip Local Search Amol Dattatraya Mali & Yevgeny Lipen (*) Elect: 1-414-229-2769, mali@uwm.edu (*) Strong Financial Corporation, 200 Woodland Prime, Menomonee Falls

  17. On the Hybrid Propositional Encodings of Planning 1 Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    On the Hybrid Propositional Encodings of Planning 1 Amol Dattatraya Mali Electrical Engg. & Computer Science University of Wisconsin, Milwaukee, USA e-mail: mali@miller.cs.uwm.edu Phone (W): 1

  18. Encoding HTN Planning in Propositional Logic \\Lambda Amol D. Mali and Subbarao Kambhampati

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    Encoding HTN Planning in Propositional Logic \\Lambda Amol D. Mali and Subbarao Kambhampati Department of Computer Science & Engineering, Arizona State University, Tempe, AZ 85287­5406 Email: famol.mali

  19. On the utility of Planspace (Causal) Encodings Amol D. Mali & Subbarao Kambhampati \\Lambda

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    On the utility of Plan­space (Causal) Encodings Amol D. Mali & Subbarao Kambhampati \\Lambda Dept. of Computer Science & Engineering Arizona State University, Tempe, AZ 85287­5406 Email: famol.mali, raog

  20. Frugal Propositional Encodings for Planning \\Lambda Amol D. Mali, Subbarao Kambhampati

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    Frugal Propositional Encodings for Planning \\Lambda Amol D. Mali, Subbarao Kambhampati Dept. of computer science & Engg. Arizona state university, Tempe, AZ 85287­5406 famol.mali, raog@.asu.edu Abstract

  1. DSatz: A Directional SAT Solver for Planning Mark Iwen and Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    DSatz: A Directional SAT Solver for Planning Mark Iwen and Amol Dattatraya Mali Electrical Engineering and Computer Science University of Wisconsin, Milwaukee, WI 53211 iwen2724@uwm.edu, mali

  2. On the utility of Plan-space (Causal) Encodings Amol D. Mali & Subbarao Kambhampati

    E-Print Network [OSTI]

    Kambhampati, Subbarao

    On the utility of Plan-space (Causal) Encodings Amol D. Mali & Subbarao Kambhampati Dept. of Computer Science & Engineering Arizona State University, Tempe, AZ 85287-5406 Email: famol.mali, raog

  3. Local Search for Incremental Satis ability Jos'e Gutierrez and Amol Dattatraya Mali,

    E-Print Network [OSTI]

    Mali, Amol D.

    Local Search for Incremental Satis#12;ability Jos'e Gutierrez and Amol Dattatraya Mali, Dept: 1-414-229-2769 jose@uwm.edu, mali@miller.cs.uwm.edu Content Areas: Propositional Satis#12;ability

  4. Encoding HTN Planning in Propositional Logic Amol D. Mali and Subbarao Kambhampati

    E-Print Network [OSTI]

    Mali, Amol D.

    Encoding HTN Planning in Propositional Logic #3; Amol D. Mali and Subbarao Kambhampati Department of Computer Science & Engineering, Arizona State University, Tempe, AZ 85287-5406 Email: famol.mali, raog

  5. Toward On-line Schema Evolution for Non-stop Amol Deshpande and Michael Hicks

    E-Print Network [OSTI]

    Hicks, Michael

    in the third issue. Supporting on-line evolution is non-trivial. Almost every aspect of a running database and process of on-line schema evolution more concrete, we present an example inspired by http://www.agiledata.org/essays/databaseToward On-line Schema Evolution for Non-stop Systems Amol Deshpande and Michael Hicks University

  6. PADS: A Policy Architecture for Distributed Storage Systems Nalini Belaramani, Jiandan Zheng, Amol Nayate, Robert Soule,

    E-Print Network [OSTI]

    Grimm, Robert

    PADS: A Policy Architecture for Distributed Storage Systems Nalini Belaramani, Jiandan Zheng§, Amol for build- ing distributed storage systems. A policy architecture has two aspects. First, a common set for how policies, them- selves, should be specified. In the case of distributed storage systems, PADS

  7. Automatic Problem Decomposition for Distributed Planning Mark Iwen & Amol Dattatraya Mali,

    E-Print Network [OSTI]

    Mali, Amol D.

    Automatic Problem Decomposition for Distributed Planning Mark Iwen & Amol Dattatraya Mali, EECS.uwm.edu, mali@miller.cs.uwm.edu Content Areas: Distributed Planning, Graphplan Abstract (Appears in [Mali & Kambhampati 2002]. Most of the research in distributed planning has fo- cused on important

  8. S-MEP: A Planner for Numeric Goals Javier Sanchez(*) & Amol Dattatraya Mali

    E-Print Network [OSTI]

    Mali, Amol D.

    S-MEP: A Planner for Numeric Goals Javier Sanchez(*) & Amol Dattatraya Mali Dept. of Elect. Engg-414-229-2769, mali@uwm.edu (*) EDESA S.A, Cra 18 86A-14, Bogota, Colombia, javier.sanchez@edesa.net Abstract Planning

  9. On the Behavior-based Architectures of Autonomous Amol Dattatraya Mali (Member, IEEE)

    E-Print Network [OSTI]

    Mali, Amol D.

    On the Behavior-based Architectures of Autonomous Agency 1 Amol Dattatraya Mali (Member, IEEE) Dept-414-229-6762, Fax - 1-414-229-2769 mali@miller.cs.uwm.edu Abstract A number of autonomous robots with varying degree

  10. On Quanti ed Weighted MAX-SAT Amol D. Mali 1

    E-Print Network [OSTI]

    Mali, Amol D.

    On Quanti#12;ed Weighted MAX-SAT Amol D. Mali 1 Abstract Propositional satis#12;ability (SAT Science, University of Wisconsin, Milwaukee, WI 53211, mali@miller.cs.uwm.edu, Phone: 1-414-229-6762, Fax: 1-414-229-2769, http://www.cs.uwm.edu/faculty/mali. This technical report is an extended version

  11. a-IGZO TFT Based Pixel Circuits for AM-OLED Displays Hyunseung Jung, Yongchan Kim, Youngseok Kim, Charlene Chen1

    E-Print Network [OSTI]

    Kanicki, Jerzy

    ) full color active-matrix organic light-emitting displays (AM-OLEDs). Simulation results, based on aa-IGZO TFT Based Pixel Circuits for AM-OLED Displays Hyunseung Jung, Yongchan Kim, Youngseok Kim-InGaZnO TFT and OLED experimental data, show that both device sizes and operational voltages can be reduced

  12. 7.3: Reliability Enhancement of AM-OLED with a-Si:H TFT and Top-Anode OLED Employing a New Pixel Circuit

    E-Print Network [OSTI]

    Kanicki, Jerzy

    device and top-anode OLED structure as a top light emission device. We focused on maintaining constant7.3: Reliability Enhancement of AM-OLED with a-Si:H TFT and Top-Anode OLED Employing a New Pixel, USA Abstract: This paper reports a new pixel circuit suitable for enhancing the reliability of AM-OLED

  13. P-14 / C. Chen P-14: AM-OLED Pixel Circuits Based on a-InGaZnO Thin Film Transistors

    E-Print Network [OSTI]

    Kanicki, Jerzy

    film transistors (TFTs) to active- matrix organic light emitting display (AM-OLED) pixel circuits-matrix organic light-emitting display (AM-OLED) is now generally viewed as the next generation display because to constantly supply a current to the organic light- emitting diode (OLED) instead of just acting like a switch

  14. Towards a Model-based Application Integration Framework for Smart Oilfields Cong Zhang, Amol Bakshi, Viktor Prasanna

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    oilfields are characterized with heterogeneous data and resources, com- plicated business processesTowards a Model-based Application Integration Framework for Smart Oilfields Cong Zhang, Amol Bakshi- duction has led to an industry-wide push to develop smart oilfields for the future. Applications for smart

  15. Energy Ecient Monitoring in Sensor Networks Amol Deshpande y Samir Khuller zx Azarakhsh Malekian z Mohammed Toossi

    E-Print Network [OSTI]

    Khuller, Samir

    Energy EÆcient Monitoring in Sensor Networks #3; Amol Deshpande y Samir Khuller zx Azarakhsh Malekian z Mohammed Toossi Abstract In this paper we study a set of problems related to eÆ- cient energy Introduction EÆcient energy management in sensor networks is a primary challenge as we expect wireless de

  16. Sandia Energy - Sandians Won Best Poster Award at the ASME 12th...

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

    Won Best Poster Award at the ASME 12th Fuel Cell Science, Engineering, and Technology Conference Home Energy Transportation Energy Facilities News News & Events Research &...

  17. Single-Walled Carbon Nanotubes for High-Energy Optical Pulse Formation Yong-Won Song

    E-Print Network [OSTI]

    Maruyama, Shigeo

    - 1 - Single-Walled Carbon Nanotubes for High-Energy Optical Pulse Formation Yong-Won Song Center-Walled Carbon Nanotubes for High-Energy Optical Pulse Formation Authors: Yong-Won Song, Shinji Yamashita, Shigeo for Energy Materials Research, Korea Institute of Science and Technology, Seoul 136-791, Korea E-mail: ysong

  18. Linda and T.J. Won the Inaugural Third Year Design Competition

    E-Print Network [OSTI]

    Calgary, University of

    Linda and T.J. Won the Inaugural Third Year Design Competition Linda Savage and Tommy-Jo (TJ) Fletcher, third year civil engineering students won the inaugural third year design competition eight assignments in third year civil engineering curriculum, write an executive summary (to explain

  19. A Distributed Ladder Transportation Algorithm for Two Robots in a Corridor \\Lambda Yuichi Asahiro y Eric ChungHui Chang z Amol Mali z Ichiro Suzuki z Masafumi Yamashita y

    E-Print Network [OSTI]

    Mali, Amol D.

    Eric Chung­Hui Chang z Amol Mali z Ichiro Suzuki z Masafumi Yamashita y y Department of Computer Science and Communication Engineering, Kyushu University, Fukuoka, Japan z Department of Electrical

  20. Policy Ratification Dakshi Agrawal, James Giles, Kang-Won Lee, Jorge Lobo

    E-Print Network [OSTI]

    Lee, Kang-Won

    Policy Ratification Dakshi Agrawal, James Giles, Kang-Won Lee, Jorge Lobo IBM T. J. Watson Research the syntax of new poli- cies before they are deployed in a system; policies need to be analyzed for their interactions with each other and with their local environment. That is, policies need to go through a rat

  1. A Microfluidic Biomaterial Mario Cabodi, Nak Won Choi, Jason P. Gleghorn, Christopher S. D. Lee,

    E-Print Network [OSTI]

    A Microfluidic Biomaterial Mario Cabodi, Nak Won Choi, Jason P. Gleghorn, Christopher S. D. Lee this physiological strategy in synthetic biomaterials. A successful Microfluidic Biomaterial (µFBM), a biomaterial with an embedded microfluidic network, must satisfy the conven- tional constraints on biomaterials as well

  2. Coordination of Converter and Fuel Cell Controllers Kyung-Won Suh and Anna G. Stefanopoulou

    E-Print Network [OSTI]

    Stefanopoulou, Anna

    Coordination of Converter and Fuel Cell Controllers Kyung-Won Suh and Anna G. Stefanopoulou following fuel cell systems depend on control of reactant flow and regulation of DC bus voltage during load (current) drawn from them. To this end, we model and analyze the dynamics of a fuel cell system equipped

  3. Adaptive Neural Replication and Resilient Control Despite Malicious Attacks Salvatore Giorgi, Firdous Saleheen, Frank Ferrese, and Chang-Hee Won

    E-Print Network [OSTI]

    Won, Chang-Hee

    , Firdous Saleheen, Frank Ferrese, and Chang-Hee Won Department of Electrical and Computer Engineering adaptive neural networks. I. INTRODUCTION The problem of maintaining control in the face of mali- cious

  4. Md. Mottaleb Hossain won "People's Choice" award in the student poster competition at CS/ECE Tech Day 2014 at The University of New Mexico

    E-Print Network [OSTI]

    New Mexico, University of

    Md. Mottaleb Hossain won "People's Choice" award in the student poster competition at CS/ECE Tech Day 2014 at The University of New Mexico CHTM and OSE-ECE graduate student, Md. Mottaleb Hossain, won a prestigious "People's Choice" award in the student poster competition at CS/ECE Tech Day 2014

  5. WHAT TO DO ABOUT CLIMATE CHANGE? Slowing the rate of carbon burning won't stop global warming

    E-Print Network [OSTI]

    Baez, John

    WHAT TO DO ABOUT CLIMATE CHANGE? #12;Slowing the rate of carbon burning won't stop global warming: most CO2 stays in the air over a century, though individual molecules come and go. Global warming. But we need to research it -- starting now. If global warming gets bad, public opinion may suddently flip

  6. TabletopAccelerator Breaks`Cold Fusion'Jinx ButWon'tYield Energy,Physicists Say

    E-Print Network [OSTI]

    TabletopAccelerator Breaks`Cold Fusion'Jinx ButWon'tYield Energy,Physicists Say A crystal with a strange property is at the heart of a clever method for inducing nuclear fusion in a tabletop-sized device-rays for medical therapies. Although the field of room-temperature fusion is littered with scandals and dubious

  7. Satellite Attitude Control Using Statistical Game Theory Jong-Ha Lee, Ronald W. Diersing and Chang-Hee Won

    E-Print Network [OSTI]

    Won, Chang-Hee

    Satellite Attitude Control Using Statistical Game Theory Jong-Ha Lee, Ronald W. Diersing and Chang sensing satellite attitude control. Statistical game theory is a generalization of mixed H2/H control-Hee Won Abstract-- We consider the application of multi-objective sta- tistical game theory to a remote

  8. TOP 10 REASONS NUKES WON'T SAVE CLIMATE Tue Aug 18, 2009 at 10:47:22 AM PDT

    E-Print Network [OSTI]

    Laughlin, Robert B.

    . Leaving aside the politics for a moment--and those Senators who most want more nuclear subsidies arenTOP 10 REASONS NUKES WON'T SAVE CLIMATE Tue Aug 18, 2009 at 10:47:22 AM PDT Despite the nuclear industry's lavishly-funded propaganda, which claims that nuclear power is at least a partial solution

  9. Nano/Microfluidics for diagnosis of infectious diseases in developing countries Won Gu Lee a,b,1

    E-Print Network [OSTI]

    Demirci, Utkan

    Nano/Microfluidics for diagnosis of infectious diseases in developing countries Won Gu Lee a,b,1 history: Received 15 June 2009 Accepted 14 September 2009 Available online 30 November 2009 Keywords: Nano/Microfluidics Infectious diseases HIV/AIDS Point-of-care Diagnostics Global health Nano/Microfluidic technologies

  10. WON NATIONAL PRIZE AS STUDENT OF THE YEAR PAGES 24-25 EXCHANGE STUDENTS ABOUT STUDYING AT LIU PAGES 4-6

    E-Print Network [OSTI]

    Zhao, Yuxiao

    Alumni around the globe Meet four international alumni from LiU. 34 Working with the world's largest student barometer (ISB), the biggest student survey in the world. In the latest survey, over 90% would recently won the biggest case competition in the world for business students are, by the way, a wonderful

  11. Vacuum-ultraviolet ionization spectroscopy of the jet-cooled RNA-base Kyo-Won Choi, Joo-Hee Lee and Sang Kyu Kim*

    E-Print Network [OSTI]

    Kim, Sang Kyu

    Vacuum-ultraviolet ionization spectroscopy of the jet-cooled RNA-base uracil Kyo-Won Choi, Joo accurately and precisely determined for the first time using a vacuum-ultraviolet mass-analyzed threshold be used for the clarification of the latter in this report. Here, we employ a vacuum-ultraviolet mass

  12. Sponsorship Packet Young Alumni Night

    E-Print Network [OSTI]

    Arnold, Jonathan

    Sponsorship Packet 2015 Young Alumni Night at SweetWater Brewing Company #12;UGA Young Alumni Night at SweetWater Brewing Company 2015 Sponsorship Opportunities Silver Sponsor - $500 Logo on UGA Young Alumni at SweetWater Brewing Company 2015 Sponsorship Opportunities (company or individual name as it should

  13. Karine Chesnel Brigham Young University

    E-Print Network [OSTI]

    Hart, Gus

    Exam committee at BYU Physics department Society member: American Physical Society (APS), The MineralsKarine Chesnel Brigham Young University Department of Physics & Astronomy N 319 ESC Provo, Utah, Department of Physics and Astronomy, Brigham Young University, Utah, USA 2007 (Jan-Dec): Visiting Researcher

  14. Growth mechanism of catalyst-and template-free group III-nitride nanorods Yong Sun Won a,b,,1

    E-Print Network [OSTI]

    Anderson, Timothy J.

    , Young Seok Kim a , Olga Kryliouk a,c,2,Ã, Timothy J. Anderson a a Department of Chemical Engineering calculation A1. Phase equilibria A3. Hydride vapor phase epitaxy B2. Semiconducting III­V materials a b s t r a c t A feasible mechanism for catalyst- and template-free group III-nitride nanorod growth by hydride

  15. BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES

    E-Print Network [OSTI]

    Seamons, Kent E.

    #12;BRIGHAM YOUNG UNIVERSITY GEOLOGY STUDIES Volume 33, Part 1 CONTENTS Tertiary Geologic History Geology of the Deadman Canyon 7112-Minute Quadrangle, Carbon County, Utah, Utah. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .James Douglas Smith 135 Geology

  16. 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

  17. 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 and teachers #12;Information for Researchers pages 1-8 Information for Teachers pages 9-14 Resources for Researchers and Teachers pages 15-20 #12;Research Councils UK (RCUK) support a portfolio of successful

  18. FIRE Diagnostics Kenneth M. Young

    E-Print Network [OSTI]

    first evaluation of plasmas where alpha-particle heating dominates. K. M. Young 5/2/00 #12;Simplified° Vacuum Vessel Test Cell Floor Quartz coherent fiber optic bundles Radiation Shielding Enclosure Detector Enclosure Probes Basement Floor Shielding for fiber bundles CL TFTR Escaping Alpha Diagnostic TFTR K. M

  19. 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

  20. 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

  1. Studying Young Stars with Large Spectroscopic Surveys

    E-Print Network [OSTI]

    Martell, Sarah L

    2015-01-01

    Galactic archaeology is the study of the history of star formation and chemical evolution in the Milky Way, based on present-day stellar populations. Studies of young stars are a key anchor point for Galactic archaeology, since quantities like the initial mass function and the star formation rate can be studied directly in young clusters and star forming regions. Conversely, massive spectroscopic Galactic archaeology surveys can be used as a data source for young star studies.

  2. Young Women's Conference in Science, Technology, Engineering...

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

    Education Organization Contact Us Programs Young Women's Conference in Science, Technology, Engineering & Mathematics Due to an overwhelming response, registration for the 2015...

  3. Adam Young | Argonne Leadership Computing Facility

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

    Young Guest Researcher Argonne National Laboratory 9700 S. Cass Avenue Building 240 Wkstn. 4D15 Argonne, IL 60439 younga@anl...

  4. Feeding Young Horses For Sound Development 

    E-Print Network [OSTI]

    Gibbs, Pete G.; Potter, Gary D.

    2005-05-25

    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...

  5. 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...

  6. 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)

    1994-07-01

    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.

  7. Model-Driven Data Acquisition in Sensor Networks Amol Deshpande

    E-Print Network [OSTI]

    Hellerstein, Joseph M.

    is a database" is problematic, however, because sensors do not exhaustively represent the data in the real world to complement the readings. In this paper, we enrich interactive sensor querying with statistical modeling tech time and energy. Utilizing the combination of a model and live data acquisition raises the challenging

  8. Enhanced Photocurrent in Engineered Bacteriorhodopsin Monolayer Amol V. Patil,

    E-Print Network [OSTI]

    Watts, Anthony

    these membranes the protein is trimeric with each monomer, an independent proton pump composed of seven; the remaining steps are a sequence of thermal relaxations that return the retinal to its all-trans conformer.4 surface. Wild-type BR, which occurs as a two-dimensional crystal, exhibits exceptional thermal

  9. Moon C. Won 2300 Glenna Goodacre Blvd

    E-Print Network [OSTI]

    Chen, Xinzhong

    DOT Research Project 0-1753 (1996 ­ 1998: $67,052) Conducted research studies on the use of recycled concrete aggregates for concrete pavement. 1990 ­ 1990: The University of Texas at Austin Research Engineer operations of the engineering section of TxDOT's Houston District Laboratory and Soils & Aggregates Section

  10. Palatability of beef from young bulls 

    E-Print Network [OSTI]

    Riley, Ray Renfrow

    1981-01-01

    Palatability of Beef from Young Bulls. (December 1981) Ray Renfrow Riley, B. S. , Texas ASM University Co-Chairmen of Advisory Committee: Dr. J. W, Savell Dr. G. C. Smrth Electrical stimulation (ES), subcutaneous fat thickness and carcass masculinity... such matched steers were not different (P&. 05) - n overall palatability than steaks from ES young bulls. Steaks from U. S. Choice steers and from U. S. Good steers or bulls that had at least. 7. 62 mm fat thickness did not differ (P&. 05) in 39 of 42...

  11. Young Persons Guide to BCPL Programming

    E-Print Network [OSTI]

    Mullins, Robert

    Young Persons Guide to BCPL Programming on the Raspberry Pi Part 1 by Martin Richards mr:07:33 BST 2015 Abstract The Raspberry Pi is a credit card sized computer with versions costing between £20 to learn to write, compile and run BCPL programs on the Raspberry Pi in as little as one or two days, even

  12. SPRING/SUMMER 2012 ANDREW YOUNG SCHOOL

    E-Print Network [OSTI]

    Frantz, Kyle J.

    for supporting our students. Another is the new university-wide Honors College. Assistant Dean Cynthia Searcy has three times a year for alumni, friends, faculty and staff of the AndrewYoung School of Policy Studies Cynthia Searcy Assistant Dean for Academic Programs Avani Raval Promotion, Events, Facilities & Safety

  13. Growing Young Trees in the Greening Era

    E-Print Network [OSTI]

    Ma, Lena

    winter · If possible, consider electric pumps and computer controls to be able to irrigate in small doses · Irrigation · Fertilization · Weed Control · Pest Management · Disease Management #12;The Young Tree Paradox and economic return = FLUSH!!! #12;Irrigation · Critical ­ restriction of canopy development is the first

  14. , 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

  15. DENNIS J. MOORE 2015 Young Guns Award Recipient

    E-Print Network [OSTI]

    Rock, Chris

    DENNIS J. MOORE 2015 Young Guns Award Recipient Dennis J. Moore, CFP® , MBA has established himself. In addition, he was named the 2011 FPA DFW Young Gun. Dennis lives in Dallas with his wife, Aubrey, who

  16. An equivalent form of Young's inequality with upper bound

    E-Print Network [OSTI]

    E. Minguzzi

    2008-08-05

    Young's integral inequality is complemented with an upper bound to the remainder. The new inequality turns out to be equivalent to Young's inequality, and the cases in which the equality holds become particularly transparent in the new formulation.

  17. Registration for the 2015 Conference for Young Women in STEM...

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

    Registration for the 2015 Conference for Young Women in STEM is OPEN October 15, 2014 The 2015 Young Women's Conference in STEM will be held on Thursday, March 19, 2015 at...

  18. Jefferson Lab Activities Group Invites Young and Not-So-Young...

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

    Holiday Events Holiday Party on Dec. 12 for Jefferson Lab Children and the Young at Heart The JAG Holiday Party is scheduled for Saturday, Dec. 12, 10 a.m.-1 p.m. in the CEBAF...

  19. 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

  20. Quality characteristics of young bovine carcasses 

    E-Print Network [OSTI]

    Bellinger, John Wayne

    1978-01-01

    ) May 1978 442834 1 1. 1 ABSTRACT Quality Characteristics of Young Bovine Carcasses. (May 1978) John Wayne Bellinger B. S. , Texas A&M University Co-Chairmen of Advisory Committee: Dr. G C. Smith Dr Z. L. Carpenter A total of 305 carcasses... longissimus muscle steaks. ACKNOWLEDGMENTS The author greatly appreciates the encouragement and inspiration given by Drs. G. C. Smith and Z. L. Carpenter throughout his coursework and research. Their guidance and suggestions will always be remembered...

  1. NEW YOUNG STAR CANDIDATES IN CG4 AND Sa101

    SciTech Connect (OSTI)

    Rebull, L. M.; Laine, S.; Laher, R.; Legassie, M.; Hoette, V.; Kim, J. S.; Foster, M.; Mallory, C. R.; McCarron, K.; Sherry, W. H.

    2011-07-15

    The CG4 and Sa101 regions together cover a region of {approx}0.5 deg{sup 2} in the vicinity of a 'cometary globule' that is part of the Gum Nebula. There are seven previously identified young stars in this region; we have searched for new young stars using mid- and far-infrared data (3.6-70 {mu}m) from the Spitzer Space Telescope, combined with ground-based optical data and near-infrared data from the Two Micron All Sky Survey. We find infrared excesses in all six of the previously identified young stars in our maps and identify 16 more candidate young stars based on apparent infrared excesses. Most (73%) of the new young stars are Class II objects. There is a tighter grouping of young stars and young star candidates in the Sa101 region, in contrast to the CG4 region, where there are fewer young stars and young star candidates, and they are more dispersed. Few likely young objects are found in the 'fingers' of the dust being disturbed by the ionization front from the heart of the Gum Nebula.

  2. SEARCHING FOR YOUNG M DWARFS WITH GALEX

    SciTech Connect (OSTI)

    Shkolnik, Evgenya L.; Weinberger, Alycia J.; Liu, Michael C.; Dupuy, Trent; Reid, I. Neill E-mail: alycia@dtm.ciw.edu E-mail: tdupuy@ifa.hawaii.edu

    2011-01-20

    The census of young moving groups in the solar neighborhood is significantly incomplete in the low-mass regime. We have developed a new selection process to find these missing members based on the Galaxy Evolution Explorer (GALEX) All-Sky Imaging Survey (AIS). For stars with spectral types {approx}>K5 (R - J {approx}> 1.5) and younger than {approx}300 Myr, we show that near-UV (NUV) and far-UV (FUV) emission is greatly enhanced above the quiescent photosphere, analogous to the enhanced X-ray emission of young low-mass stars seen by ROSAT but detectable to much larger distances with GALEX. By combining GALEX data with optical (HST Guide Star Catalog) and near-IR (2MASS) photometry, we identified an initial sample of 34 young M dwarf candidates in a 1000 deg{sup 2} region around the {approx}10 Myr TW Hydra Association (TWA). Low-resolution spectroscopy of 30 of these found 16 which had H{alpha} in emission, which were then followed up at high resolution to search for spectroscopic evidence of youth and to measure their radial velocities. Four objects have low surface gravities, photometric distances and space motions consistent with TWA, but the non-detection of Li indicates that they may be too old to belong to this moving group. One object (M3.5, 93 {+-} 19 pc) appears to be the first known accreting low-mass member of the {approx}15 Myr Lower Centaurus Crux OB association. Two objects exhibit all the characteristics of the known TWA members, and thus we designate them as TWA 31 (M4.2, 110 {+-} 11 pc) and TWA 32 (M6.3, 53 {+-} 5 pc). TWA 31 shows extremely broad (447 km s{sup -1}) H{alpha} emission, making it the sixth member of TWA found to have ongoing accretion. TWA 32 is resolved into a 0.''6 binary in Keck laser guide star adaptive optics imaging. Our search should be sensitive down to spectral types of at least M4-M5 in TWA and thus the small numbers of new member is puzzling. This might indicate TWA has an atypical mass function or that the presence of lithium absorption may be too restrictive a criteria for selecting young low-mass stars.

  3. YoungHo Shin | Argonne National Laboratory

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust,Field-effectWorkingLos Alamos verifies largest single|Yejun FengResultscurrent |YoungHo

  4. Young Physicist from Syracuse University Receives Jefferson Lab...

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

    Physicist from Syracuse University Receives Jefferson Lab's 2014 Thesis Prize Beminiwattha Rakitha Beminiwattha NEWPORT NEWS, VA, June 6, 2014 - A young researcher, who worked on...

  5. Three Young Scientists Earn DOE Graduate Research Grants at Jefferson...

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

    accomplishments have earned three young scientists funds to conduct part of their thesis research at the U.S. Department of Energy's Thomas Jefferson National Accelerator...

  6. Young Womens Conference attracts more attendees in 2014! | Princeton...

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

    Gallery: The 2014 Young Women's Conference is Science, Engineering, Technology, and Mathematics attracted students from all over New Jersey With almost 400 students, 50,...

  7. Pluto's Seasons: New Predictions for New Horizons L. A. Young

    E-Print Network [OSTI]

    Young, Leslie A.

    (2012) and Young (in prep). Energy balance for the world that New Horizons will encounter in 2015, and our ability to relate this snapshot to preceding

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

    Open Energy Info (EERE)

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

  9. 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

  10. 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. The research employed ethnographic techniques to capture youth experiences and understandings of mountain

  11. The New York State Summer Young Writers Institute

    E-Print Network [OSTI]

    Alexandrova, Ivana

    #12;The New York State Summer Young Writers Institute W hat you hold in your hands are the poems and stories ­ true and imagined ­ that the stu- dents of the New York State Summer Young Writers Institute take advantage of the New York State Summer Writers Institute, directed by Robert Boyers, which

  12. The New York State Summer Young Writers Institute

    E-Print Network [OSTI]

    Alexandrova, Ivana

    #12;The New York State Summer Young Writers Institute The New York State Summer Young Writers Institute (NYSSYWI), sponsored jointly by the New York State Writers Institute at the University at Albany attend high schools in New York State. Now in its 9th year, NYSSYWI is held the first week in July

  13. 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;2 To the New Graduate Student, On behalf of the faculty and staff of the Department of Chemical Engineering

  14. Spoken word recognition and lexical representation in very young children

    E-Print Network [OSTI]

    Makous, Walter

    Spoken word recognition and lexical representation in very young children Daniel Swingley*, Richard March 2000 Abstract Although children's knowledge of the sound patterns of words has been a focus of debate for many years, little is known about the lexical representations very young children use in word

  15. The New York State Summer Young Writers Institute

    E-Print Network [OSTI]

    Alexandrova, Ivana

    #12;The New York State Summer Young Writers Institute What you hold in your hands are the poems and stories ­ true and imagined ­ that the students of the New York State Summer Young Writers Institute that our students could take advantage of the New York State Summer Writers Institute, directed by Robert

  16. 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

  17. 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

  18. 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

  19. 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

  20. SED modeling of Young Massive Stars

    E-Print Network [OSTI]

    Thomas P. Robitaille

    2007-11-27

    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.

  1. Isokinetic Peak Torque in Young Wrestlers

    E-Print Network [OSTI]

    Housh, Terry J.; Johnson, Glen O.; Housh, Dona J.; Stout, Jeffrey R.; Weir, Joseph P.; Weir, Loree L.; Eckerson, Joan M.

    1996-01-01

    previous studies (13, 21, 26) were within 1 stan- dard deviation of the means for the present sample of young wrestlers. These 146 — Housh, Johnson, Housh, etal. i i. E o 00 S 2 o o i en CN' —' ~ en — (N en" — — t A A A A A A A A A A A A A A A A A vo...»n'^mr^voiO':t"fnvow~i"^mvo'0"^m ooooooooaoooooooo en d +1 CN d +1 in d +1 en d +1 CN d +1 >n od +1 OS 14 5 9.7 +1 • VO t-; od +1 15 2.: GO 14 6.6 + 1 in VO +1 f^ CN vq +1 vq 13 3 +1 CN d +1 m 40 .: 1.1 +1 VO 52 . o d +1 45 .0 39 .4 ± 7, 1-: +1 OS od en OS +1 32 . p en +1...

  2. Are Low Surface Brightness Discs Young?

    E-Print Network [OSTI]

    Paolo Padoan; Raul Jimenez; Vincenzo Antonuccio-Delogu

    1996-09-12

    We reconsider the problem of the age of the stellar discs of late-type Low Surface Brightness (LSB) galaxies by making use of a new IMF recently derived from numerical fluid dynamical simulations (Padoan, Nordlund and Jones, 1997). While a Miller-Scalo IMF cannot adequately describe the photometric properties of LSBs, when we apply the new Padoan et al. (1997) IMF to a simple exponential disc model with parameters appropriate to LSBs, we get excellent fits of the colors and color gradients. We then conclude that: a) The star formation history of LSB disc galaxies can be described by an initial burst of a few times $10^7$ yr followed by a quiescent period with only sporadic star formation; b) LSBs' discs are not young. The age of the LSB disc galaxies for which colors have been measured are all larger than about 10 Gyr$.

  3. Tunable Young's Modulus in Carbon MEMS using Graphene-based Stiffeners...

    Office of Scientific and Technical Information (OSTI)

    Tunable Young's Modulus in Carbon MEMS using Graphene-based Stiffeners. Citation Details In-Document Search Title: Tunable Young's Modulus in Carbon MEMS using Graphene-based...

  4. 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)

    2014-02-01

    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.

  5. Young Stellar Objects in the Gould Belt

    E-Print Network [OSTI]

    Dunham, Michael M; Evans, Neal J; Broekhoven-Fiene, Hannah; Cieza, Lucas; Di Francesco, James; Gutermuth, Robert A; Harvey, Paul M; Hatchell, Jennifer; Heiderman, Amanda; Huard, Tracy; Johnstone, Doug; Kirk, Jason M; Matthews, Brenda C; Miller, Jennifer F; Peterson, Dawn E; Young, Kaisa E

    2015-01-01

    We present the full catalog of Young Stellar Objects (YSOs) identified in the 18 molecular clouds surveyed by the Spitzer Space Telescope "cores to disks" (c2d) and "Gould Belt" (GB) Legacy surveys. Using standard techniques developed by the c2d project, we identify 3239 candidate YSOs in the 18 clouds, 2966 of which survive visual inspection and form our final catalog of YSOs in the Gould Belt. We compile extinction corrected SEDs for all 2966 YSOs and calculate and tabulate the infrared spectral index, bolometric luminosity, and bolometric temperature for each object. We find that 326 (11%), 210 (7%), 1248 (42%), and 1182 (40%) are classified as Class 0+I, Flat-spectrum, Class II, and Class III, respectively, and show that the Class III sample suffers from an overall contamination rate by background AGB stars between 25% and 90%. Adopting standard assumptions, we derive durations of 0.40-0.78 Myr for Class 0+I YSOs and 0.26-0.50 Myr for Flat-spectrum YSOs, where the ranges encompass uncertainties in the ado...

  6. Who is Park Joo Young?, A Documentary Film

    E-Print Network [OSTI]

    Kopacz, Elizabeth Min-Sook

    2014-01-01

    Park Joo Young? , A Documentary Film A thesis submitted indocumentary narratives. I am drawn to firmly establishing the constructed nature of filmdocumentaries are visual by nature. Along a similar line, I was supposed to film

  7. Young fathers and their experiences of forming families 

    E-Print Network [OSTI]

    Ross, Nicola; Church, Stephanie; Hill, Malcolm; Seaman, Peter; Roberts, Tom

    The male partners of teenage mothers are often ignored or portrayed negatively. This briefing outlines a study that set out to see what could be learned about fathers’ roles by interviewing young couples who were committed ...

  8. 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

  9. 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

  10. Cool with Change: Young People and Family Change 

    E-Print Network [OSTI]

    Highet, Gill; Jamieson, Lynn

    Cool with Change breaks new grounds by combining in-depth research of young people’s experience of family change in Scotland, reflection by service providers on the implications for their services and consultation with ...

  11. The Spatial Structure of Young Stellar Clusters. II. Total Young Stellar Populations

    E-Print Network [OSTI]

    Kuhn, Michael A; Feigelson, Eric D

    2015-01-01

    We investigate the intrinsic stellar populations (estimated total numbers of OB and pre-main-sequence stars down to 0.1 Mo) that are present in 17 massive star-forming regions (MSFRs) surveyed by the MYStIX project. The study is based on the catalog of >31,000 MYStIX Probable Complex Members with both disk-bearing and disk-free populations, compensating for extinction, nebulosity, and crowding effects. Correction for observational sensitivities is made using the X-ray Luminosity Function (XLF) and the near-infrared Initial Mass Function (IMF)--a correction that is often not made by infrared surveys of young stars. The resulting maps of the projected structure of the young stellar populations, in units of intrinsic stellar surface density, allow direct comparison between different regions. Several regions have multiple dense clumps, similar in size and density to the Orion Nebula Cluster. The highest projected density of ~34,000 stars/pc^2 is found in the core of the RCW38 cluster. Histograms of surface densit...

  12. 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)

    2012-11-01

    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.

  13. Properties of Young Massive Cluster Derived from Photometry

    E-Print Network [OSTI]

    U. Fritze-v. Alvensleben

    2004-08-25

    I will show that photometry -- if extending over a reasonable choice of passbands -- can give fairly precise information about young star clusters and their evolutionary state. Optical colors alone are known to leave severe ambiguities due to degeneracies between age, metallicity and extinction. High quality photometry including $U, B, V$ or $I$, and a NIR band, however, in combination with an extensive grid of evolutionary synthesis models for star clusters and a dedicated tool to analyse spectral energy distributions allows to assess and largely disentangle star cluster ages, metallicities, extinction values and, hence, to derive their masses. Gaseous emission contributions sensibly affect broad band colors during the youngest stages, depending on metallicity. Mass functions of young star cluster systems may considerably differ in shape from luminosity functions. An ESO ASTROVIRTEL project provides multi-color photometry for a large number of young, intermediate age and old star cluster systems. As a first example I show results obtained for NGC 1569.

  14. Acceleration of wound healing in young and aged rats 

    E-Print Network [OSTI]

    Maxwell, Bryan Douglas

    1996-01-01

    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...

  15. NONPARAMETRIC REGRESSION ESTIMATION OF HOUSEHOLD VMT Young-Jun Kweon

    E-Print Network [OSTI]

    Kockelman, Kara M.

    NONPARAMETRIC REGRESSION ESTIMATION OF HOUSEHOLD VMT Young-Jun Kweon (Corresponding Author Transportation Survey. The results are density functions and regression surfaces for VMT, in relation regressions perform better than their ordinary-least squares counterparts in many ways: they permit full

  16. KnowledgeAssetManagementMentzasApostolou AbeckerYoung

    E-Print Network [OSTI]

    Chen-Burger, Yun-Heh (Jessica)

    123 KnowledgeAssetManagementMentzas·Apostolou Abecker·Young Gregoris Mentzas Dimitris Apostolou Knowledge Asset Management There are two main approaches to knowledge management (KM): · the process Asset Management presents a knowledge asset-centric approach, which fuses the previous two approaches

  17. Activity Identification Utilizing Data Mining Techniques Jae Young Lee

    E-Print Network [OSTI]

    Hoff, William A.

    Activity Identification Utilizing Data Mining Techniques Jae Young Lee Dept. of Math. and Computer belong to. The proposed method utilizes various data mining techniques, including clustering Sciences Colorado School of Mines Golden, Colorado, USA jaelee@mines.edu William Hoff Engineering Division

  18. Sex differences in indirect aggression Psychological evidence from young adults

    E-Print Network [OSTI]

    Sex differences in indirect aggression Psychological evidence from young adults Nicole H. Hessa theories of sex differences in indirect aggression propose selection pressures that would have acted on older teenagers and adults. Evidence for sex differences in indirect aggression in adults, however

  19. The New York State Summer Young Writers Institute

    E-Print Network [OSTI]

    Alexandrova, Ivana

    #12;The New York State Summer Young Writers Institute This anthology contains poems, stories, and creative nonfiction pieces produced by the talented high school writers of the 2009 New York State Summer held in July on the campus of Skidmore College in Saratoga Springs, New York, to coincide with one week

  20. 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

  1. 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

  2. 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

  3. 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

  4. 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

  5. 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

  6. 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

  7. How Europe fails its young Sep 8th 2005

    E-Print Network [OSTI]

    Marrucci, Lorenzo

    How Europe fails its young Sep 8th 2005 From The Economist print edition The state of Europe sense of a sort: Europe's only chance of preserving its living standards lies in working smarter than its competitors rather than harder or cheaper. But Europe's failing higher-education system poses

  8. The Young Planet-mass Ob ject 2M1207b: A cool, cloudy, and methane...

    Office of Scientific and Technical Information (OSTI)

    Young Planet-mass Ob ject 2M1207b: A cool, cloudy, and methane-poor atmosphere Citation Details In-Document Search Title: The Young Planet-mass Ob ject 2M1207b: A cool, cloudy, and...

  9. BrighamYoungUniversitySummerInternships DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY

    E-Print Network [OSTI]

    Seamons, Kent E.

    BrighamYoungUniversitySummerInternships DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY BRIGHAM YOUNG UNIVERSITY EIGHT WEEK SUMMER UNDERGRADUATE RESEARCH INTERNSHIPS The Department of Chemistry and Biochemistry programs. Summer Term 2013: June 24 through August 12 Requirements: Registered chemistry or biochemistry

  10. BrighamYoungUniversitySummerInternships DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY

    E-Print Network [OSTI]

    Seamons, Kent E.

    BrighamYoungUniversitySummerInternships DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY BRIGHAM YOUNG UNIVERSITY EIGHT WEEK SUMMER UNDERGRADUATE RESEARCH INTERNSHIPS The Department of Chemistry and Biochemistry programs. Summer Term 2012: June 18 through August 10 Requirements: Registered chemistry or biochemistry

  11. How was it for you? The quality of young people's sexual relationships 

    E-Print Network [OSTI]

    Wright, Daniel; Forrest, Simon

    Few studies have investigated young people’s own evaluations of their heterosexual experiences or relationships, other than by measuring negative sexual encounters. An evaluation of young peoples’ views is important, to ...

  12. Doing ok? Children and young people's views on what affects their mental health 

    E-Print Network [OSTI]

    Elsley, Susan; McMellon, Christina

    This briefing highlights the findings from a consultation which was undertaken with specific groups of children and young people in order to inform the NHS Health Scotland draft framework for children and young people’s ...

  13. Stanley: The Robot that Won the DARPA Grand Challenge

    E-Print Network [OSTI]

    Thrun, Sebastian

    Alessandrini Volkswagen of America, Inc. Electronics Research Laboratory 4009 Miranda Avenue, Suite 100 Palo by Stanford University, and involving experts from Volkswagen of America, Mohr Davidow Ventures, Intel Research, and a number of other entities. Stanley is based on a 2004 Volkswagen Touareg R5 TDI, outfitted

  14. WHEN SPACECRAFT WON'T POINT Christopher D. Hall

    E-Print Network [OSTI]

    Hall, Christopher D.

    failures that are used in the course. The paper includes references to failure reports, conference papers and other technical reports that describe these failures in more detail. The course, AOE 4140 Spacecraft and for reaction wheel (RW) and control moment gyro (CMG) control systems. Understand the similarities

  15. EVIDENCE FOR A WEAK WIND FROM THE YOUNG SUN

    SciTech Connect (OSTI)

    Wood, Brian E.; Müller, Hans-Reinhard; Redfield, Seth; Edelman, Eric

    2014-02-01

    The early history of the solar wind has remained largely a mystery due to the difficulty of detecting winds around young stars that can serve as analogs for the young Sun. Here we report on the detection of a wind from the 500 Myr old solar analog ?{sup 1} UMa (G1.5 V), using spectroscopic observations from the Hubble Space Telescope. We detect H I Ly? absorption from the interaction region between the stellar wind and interstellar medium, i.e., the stellar astrosphere. With the assistance of hydrodynamic models of the ?{sup 1} UMa astrosphere, we infer a wind only half as strong as the solar wind for this star. This suggests that the Sun and solar-like stars do not have particularly strong coronal winds in their youth.

  16. What could infant and young child nutrition learn from sweatshops?

    E-Print Network [OSTI]

    Singer, Peter A; Ansett, Sean; Sagoe-Moses, Isabella

    2011-05-05

    Vitamin A, iron, zinc), essential fats, and energy. Therefore, ade- quate Infant and Young Child Nutrition (IYCN) demands high rates of breastfeeding and good access to nutrient rich complementary foods, requiring public sec- tor action to promote... feeding are diminished with reliable access to Singer et al. BMC Public Health 2011, 11:276 http://www.biomedcentral.com/1471-2458/11/276 Page 2 of 5 clean water. Moreover, the companies claim the Code has shortcomings: it is open to interpretation...

  17. 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)

    2014-01-20

    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.

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

    E-Print Network [OSTI]

    G. F. Burgio; B. Link

    2006-09-20

    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_\

  19. Lean color characteristics of beef from steers and young bulls 

    E-Print Network [OSTI]

    Purser, David Elbert

    1982-01-01

    bulls are more muscular with less fat than those from steers; it would seem logical that beef from young bulls could be utilized at the retail level to provide consumers with retail cuts with less fat. One of the problems associated with marketing... panel evaluations of steaks from retail display, microbial sampling, colorimetric measures of muscle surface light reflectance, pH, and total pigment concentration were analyzed to determine causes, if any, for the differences in muscle color between...

  20. 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 the Saves program. Young Texas Saves is a youth-led movement in the Texas 4-H Program. 4-H members across 3000 4-H members across the state take part in the Young Texas Saves Program. Begin the program

  1. Ensemble Asteroseismology of the Young Open Cluster NGC 2244

    E-Print Network [OSTI]

    Aerts, Conny; Marcos-Arenal, Pablo; Moravveji, Ehsan; Degroote, Pieter; Papics, Peter; Tkachenko, Andrew; De Ridder, Joris; Briquet, Maryline; Thoul, Anne; Saesen, Sophie; Mowlavi, Nami; Barblan, Fabio; Neiner, Coralie; Pavlovski, Kresimir; Guzik, Joyce

    2013-01-01

    Our goal is to perform in-depth ensemble asteroseismology of the young open cluster NGC2244 with the 2-wheel Kepler mission. While the nominal Kepler mission already implied a revolution in stellar physics for solar-type stars and red giants, it was not possible to perform asteroseismic studies of massive OB stars because such targets were carefully avoided in the FoV in order not to disturb the exoplanet hunting. Now is an excellent time to fill this hole in mission capacity and to focus on the metal factories of the Universe, for which stellar evolution theory is least adequate. Our white paper aims to remedy major shortcomings in the theory of stellar structure and evolution of the most massive stars by focusing on a large ensemble of stars in a carefully selected young open cluster. Cluster asteroseismology of very young stars such as those of NGC2244 has the major advantage that all cluster stars have similar age, distance and initial chemical composition, implying drastic restrictions for the stellar mo...

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

    E-Print Network [OSTI]

    Carraro, G

    2002-01-01

    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...

  3. NEW CANDIDATE ERUPTIVE YOUNG STARS IN LYNDS 1340

    SciTech Connect (OSTI)

    Kun, M.; Moór, A.; Szegedi-Elek, E. [Konkoly Observatory, H-1121 Budapest, Konkoly Thege út 15-17 (Hungary); Apai, D. [Department of Astronomy and Department of Planetary Sciences, The University of Arizona, 933 North Cherry Avenue, Tucson, AZ 85721 (United States); O'Linger-Luscusk, J. [California Institute of Technology, 1200 East California Avenue, Pasadena, CA 91125 (United States); Stecklum, B. [Thüringer Landessternwarte Tautenburg, Sternwarte 5, D-07778 Tautenburg (Germany); Wolf-Chase, G., E-mail: kun@konkoly.hu [Astronomy Department, Adler Planetarium, 1300 South Lake Shore Drive, Chicago, IL 60605 (United States)

    2014-11-10

    We report on the discovery of three candidate eruptive young stars, found during our comprehensive multi-wavelength study of the young stellar population of the dark cloud L1340. These stars are as follows. (1) IRAS 02224+7227 (2MASS 02270555+7241167, HH 487S) exhibited FUor-like spectrum in our low-resolution optical spectra. The available photometric data restrict its luminosity to 23 L {sub ?} < L {sub bol} < 59 L {sub ?}. (2) 2MASS 02263797+7304575, identified as a classical T Tauri star during our H? survey, exhibited an EXor-type brightening in 2005 November at the time of the Sloan Digital Sky Survey observations of the region. (3) 2MASS 02325605+7246055, a low-mass embedded young star, associated with a fan-shaped infrared nebula, underwent an outburst between the DSS 1 and DSS 2 surveys, leading to the appearance of a faint optical nebula. Our [S II] and H? images, as well as the Spitzer Infrared Array Camera 4.5 ?m images, revealed Herbig-Haro objects associated with this star. Our results suggest that amplitudes and timescales of outbursts do not necessarily correlate with the evolutionary stage of the stars.

  4. Low Voltage, Low Power Organic Light Emitting Transistors for AMOLED Displays

    SciTech Connect (OSTI)

    McCarthy, M. A. [University of Florida, Gainesville; Liu, B. [University of Florida, Gainesville; Donoghue, E. P. [University of Florida, Gainesville; Kravchenko, Ivan I [ORNL; Kim, D. Y. [University of Florida, Gainesville; Reynolds, J. R. [University of Florida, Gainesville; So, Franky [University of Florida, Gainesville; Rinzler, A. G. [University of Florida, Gainesville

    2011-01-01

    Low voltage, low power dissipation, high aperture ratio organic light emitting transistors are demonstrated. The high level of performance is enabled by a carbon nanotube source electrode that permits integration of the drive transistor and the organic light emitting diode into an efficient single stacked device. Given the demonstrated performance, this technology could break the technical logjam holding back widespread deployment of active matrix organic light emitting displays at flat panel screen sizes.

  5. Data Component Based Management of Reservoir Simulation Models Cong Zhang Amol Bakshi Viktor K. Prasanna

    E-Print Network [OSTI]

    Hwang, Kai

    provides a clean and efficient way to man- age data sharing relationships among the models. 1 Introduction Reservoir simulation models are computer models used to predict the flow of fluids (typically, oil, water

  6. 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page| Open Energy Information Serbia-EnhancingEtGeorgia:Illinois:WizardYates County, NewYorktown Heights, New York:Young

  7. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home RoomPreservationBio-Inspired SolarAboutXu Named| Princeton Plasma Physics Lab Programs Young

  8. Sandia Energy - Sandian Selected for Outstanding Young Engineer Award

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust, High-Throughput AnalysisSinkhole OfficialsWork onand NaturalAppliedRecognized asYoung

  9. 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)

    2011-07-25

    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.

  10. 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

  11. 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.

  12. 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.

  13. Risky Business: Sex-work and Young Southeast Asian American Women in Oakland

    E-Print Network [OSTI]

    U, Nicol

    2008-01-01

    Press. ——— (b). 2001. Sex Crimes, Predators, Perpetrators,treat and “protect” young sex-workers as “victims”, how isfalling into the business of sex-work. References Bromberg,

  14. UV Radiation Fields Produced by Young Embedded Star Clusters

    E-Print Network [OSTI]

    M. Fatuzzo; F. C. Adams

    2007-12-20

    A large fraction of stars form within young embedded clusters, and these environments produce a substantial ultraviolet (UV) background radiation field, which can provide feedback on the star formation process. To assess the possible effects of young stellar clusters on the formation of their constituent stars and planets, this paper constructs the expected radiation fields produced by these clusters. We include both the observed distribution of cluster sizes $N$ in the solar neighborhood and an extended distribution that includes clusters with larger $N$. The paper presents distributions of the FUV and EUV luminosities for clusters with given stellar membership $N$, distributions of FUV and EUV luminosity convolved over the expected distribution of cluster sizes $N$, and the corresponding distributions of FUV and EUV fluxes. These flux distributions are calculated both with and without the effects of extinction. Finally, we consider the effects of variations in the stellar initial mass function on these radiation fields. Taken together, these results specify the distributions of radiation environments that forming solar systems are expected to experience.

  15. NEW YOUNG STAR CANDIDATES IN BRC 27 AND BRC 34

    SciTech Connect (OSTI)

    Rebull, L. M.; Laher, R.; Legassie, M.; Gibbs, J. C.; Aryal, S.; Canakapalli, T. S.; Linahan, M.; Ezyk, N.; Fagan, J.; Sartore, D.; Badura, K. S.; Armstrong, J. D.; Allen, L. E.; McGehee, P.; and others

    2013-01-01

    We used archival Spitzer Space Telescope mid-infrared data to search for young stellar objects (YSOs) in the immediate vicinity of two bright-rimmed clouds, BRC 27 (part of CMa R1) and BRC 34 (part of the IC 1396 complex). These regions both appear to be actively forming young stars, perhaps triggered by the proximate OB stars. In BRC 27, we find clear infrared excesses around 22 of the 26 YSOs or YSO candidates identified in the literature, and identify 16 new YSO candidates that appear to have IR excesses. In BRC 34, the one literature-identified YSO has an IR excess, and we suggest 13 new YSO candidates in this region, including a new Class I object. Considering the entire ensemble, both BRCs are likely of comparable ages, within the uncertainties of small number statistics and without spectroscopy to confirm or refute the YSO candidates. Similarly, no clear conclusions can yet be drawn about any possible age gradients that may be present across the BRCs.

  16. 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

    2009-01-01

    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...

  17. 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

  18. Course Profile: Programming and Services for Children and Young Adults Course Number: LIS 7250

    E-Print Network [OSTI]

    Berdichevsky, Victor

    Course Profile: Programming and Services for Children and Young Adults Course Number: LIS 7250 with children and young adults in public libraries there is a need for skill in the development of programming adults. Course Objectives: To provide an understanding of age-specific services, program planning

  19. SYNTHETIC SPECTRA AND COLORS OF YOUNG GIANT PLANET ATMOSPHERES: EFFECTS OF INITIAL CONDITIONS AND ATMOSPHERIC METALLICITY

    E-Print Network [OSTI]

    , as giant planets should be warmest, largest, and brightest when they are young, but will cool, contractSYNTHETIC SPECTRA AND COLORS OF YOUNG GIANT PLANET ATMOSPHERES: EFFECTS OF INITIAL CONDITIONS 2008 March 17; accepted 2008 May 7 ABSTRACT We examine the spectra and infrared colors of the cool

  20. 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

  1. 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

  2. The young stellar population in M17 revealed by Chandra

    E-Print Network [OSTI]

    Patrick S. Broos; Eric D. Feigelson; Leisa K. Townsley; Konstantin V. Getman; Junfeng Wang; Gordon P. Garmire; Zhibo Jiang; Yohko Tsuboi

    2006-12-20

    We report here results from a Chandra ACIS observation of the stellar populations in and around the Messier 17 H II region. The field reveals 886 sources, 771 of which have stellar counterparts in infrared images. In addition to comprehensive tables of X-ray source properties, several results are presented: * The X-ray Luminosity Function is calibrated to that of the Orion Nebula Cluster population to infer a total population of roughly 8000--10,000 stars * About 40% of the ACIS sources are heavily obscured with A_V > 10 mag. Some are concentrated around well-studied star-forming regions but most are distributed across the field. X-ray emission is detected from 64 of the hundreds of Class I protostar candidates that can be identified by near- and mid-infrared colors. These constitute the most likely protostar candidates known in M17. * The spatial distribution of X-ray stars is complex: we find a new embedded cluster, a 2 pc-long arc of young stars along the southwest edge of the M17 H II region, and 0.1 pc substructure within various populations. These structures may indicate that the populations are dynamically young. * All (14/14) of the known O stars but only about half (19/34) of the known B0--B3 stars in the M17 field are detected. Six of these stars exhibit very hard thermal plasma components (kT>4 keV) that may be due to colliding wind binaries. More than 100 candidate new OB stars are found, including 28 X-ray detected intermediate- and high-mass protostar candidates with infrared excesses. * Only a small fraction (perhaps 10%) of X-ray selected high- and intermediate- mass stars exhibit K-band emitting protoplanetary disks, providing further evidence that inner disks evolve very rapidly around more massive stars.

  3. 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,

  4. 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

  5. Young's modulus of electroplated Ni thin film for MEMS applications J.K. Luoa,*, A.J. Flewitta

    E-Print Network [OSTI]

    Fleck, Norman A.

    to a less dense coating. D 2004 Elsevier B.V. All rights reserved. Keywords: Young's modulus; ElectroplatedYoung's modulus of electroplated Ni thin film for MEMS applications J.K. Luoa,*, A.J. Flewitta , S online 28 April 2004 Abstract The Young's modulus of an electroplated nickel (Ni) thin film suitable

  6. Possible contribution of low shear modulus C?? to the low Young’s modulus of Ti-36Nb-5Zr alloy

    SciTech Connect (OSTI)

    Meng, Qingkun; Guo, Shun; Ren, Xiaobing; Xu, Huibin; Zhao, Xinqing

    2014-09-29

    Despite the importance of single-crystal elastic constants of ?-phase titanium alloys in understanding their low Young's modulus—a property crucial for many applications, such data are often difficult to obtain when the alloy composition is close to the instability limit of the ? phase, where the presence of ?" martensite precludes the fabrication of ?-phase single crystal. In the present study, we extracted the single-crystal elastic constants of such a ?-phase titanium alloy with low Young's modulus, Ti-36Nb-5Zr (wt. %), from polycrystalline specimens by using an in-situ synchrotron X-ray diffraction technique. It is indicated that the low Young's modulus of the alloy originates from the anomalously low shear modulus C?? as well as the low shear modulus C', which is different from a common viewpoint that the Young's modulus of ?-phase titanium alloys is dominantly controlled by the C'. This suggests that low C?? is an important contributor to low Young's modulus for instable ?-phase titanium alloys.

  7. Searches for continuous gravitational waves from nine young supernova remnants

    E-Print Network [OSTI]

    Aasi, J; Abbott, R; Abbott, T; Abernathy, M R; Acernese, F; Ackley, K; Adams, C; Adams, T; Addesso, P; Adhikari, R X; Adya, V; Affeldt, C; Agathos, M; Agatsuma, K; Aggarwal, N; Aguiar, O D; Ain, A; Ajith, P; Alemic, A; Allen, B; Allocca, A; Amariutei, D; Anderson, S B; Anderson, W G; Arai, K; Araya, M C; Arceneaux, C; Areeda, J S; Ast, S; Aston, S M; Astone, P; Aufmuth, P; Aulbert, C; Aylott, B E; Babak, S; Baker, P T; Baldaccini, F; Ballardin, G; Ballmer, S W; Barayoga, J C; Barbet, M; Barclay, S; Barish, B C; Barker, D; Barone, F; Barr, B; Barsotti, L; Barsuglia, M; Bartlett, J; Barton, M A; Bartos, I; Bassiri, R; Basti, A; Batch, J C; Bauer, Th S; Baune, C; Bavigadda, V; Behnke, B; Bejger, M; Belczynski, C; Bell, A S; Bell, C; Benacquista, M; Bergman, J; Bergmann, G; Berry, C P L; Bersanetti, D; Bertolini, A; Betzwieser, J; Bhagwat, S; Bhandare, R; Bilenko, I A; Billingsley, G; Birch, J; Biscans, S; Bitossi, M; Biwer, C; Bizouard, M A; Blackburn, J K; Blackburn, L; Blair, C D; Blair, D; Bloemen, S; Bock, O; Bodiya, T P; Boer, M; Bogaert, G; Bojtos, P; Bond, C; Bondu, F; Bonelli, L; Bonnand, R; Bork, R; Born, M; Boschi, V; Bose, Sukanta; Bradaschia, C; Brady, P R; Braginsky, V B; Branchesi, M; Brau, J E; Briant, T; Bridges, D O; Brillet, A; Brinkmann, M; Brisson, V; Brooks, A F; Brown, D A; Brown, D D; Brown, N M; Buchman, S; Buikema, A; Bulik, T; Bulten, H J; Buonanno, A; Buskulic, D; Buy, C; Cadonati, L; Cagnoli, G; Bustillo, J Calderón; Calloni, E; Camp, J B; Cannon, K C; Cao, J; Capano, C D; Carbognani, F; Caride, S; Caudill, S; Cavaglià, M; Cavalier, F; Cavalieri, R; Cella, G; Cepeda, C; Cesarini, E; Chakraborty, R; Chalermsongsak, T; Chamberlin, S J; Chao, S; Charlton, P; Chassande-Mottin, E; Chen, Y; Chincarini, A; Chiummo, A; Cho, H S; Cho, M; Chow, J H; Christensen, N; Chu, Q; Chua, S; Chung, S; Ciani, G; Clara, F; Clark, J A; Cleva, F; Coccia, E; Cohadon, P -F; Colla, A; Collette, C; Colombini, M; Cominsky, L; Constancio,, M; Conte, A; Cook, D; Corbitt, T R; Cornish, N; Corsi, A; Costa, C A; Coughlin, M W; Coulon, J -P; Countryman, S; Couvares, P; Coward, D M; Cowart, M J; Coyne, D C; Coyne, R; Craig, K; Creighton, J D E; Creighton, T D; Cripe, J; Crowder, S G; Cumming, A; Cunningham, L; Cuoco, E; Cutler, C; Dahl, K; Canton, T Dal; Damjanic, M; Danilishin, S L; D'Antonio, S; Danzmann, K; Dartez, L; Dattilo, V; Dave, I; Daveloza, H; Davier, M; Davies, G S; Daw, E J; Day, R; DeBra, D; Debreczeni, G; Degallaix, J; De Laurentis, M; Deléglise, S; Del Pozzo, W; Denker, T; Dent, T; Dereli, H; Dergachev, V; De Rosa, R; DeRosa, R T; DeSalvo, R; Dhurandhar, S; Díaz, M; Di Fiore, L; Di Lieto, A; Di Palma, I; Di Virgilio, A; Dojcinoski, G; Dolique, V; Dominguez, E; Donovan, F; Dooley, K L; Doravari, S; Douglas, R; Downes, T P; Drago, M; Driggers, J C; Du, Z; Ducrot, M; Dwyer, S; Eberle, T; Edo, T; Edwards, M; Effler, A; Eggenstein, H -B; Ehrens, P; Eichholz, J; Eikenberry, S S; Essick, R; Etzel, T; Evans, M; Evans, T; Factourovich, M; Fafone, V; Fairhurst, S; Fan, X; Fang, Q; Farinon, S; Farr, B; Farr, W M; Favata, M; Fays, M; Fehrmann, H; Fejer, M M; Feldbaum, D; Ferrante, I; Ferreira, E C; Ferrini, F; Fidecaro, F; Fiori, I; Fisher, R P; Flaminio, R; Fournier, J -D; Franco, S; Frasca, S; Frasconi, F; Frei, Z; Freise, A; Frey, R; Fricke, T T; Fritschel, P; Frolov, V V; Fuentes-Tapia, S; Fulda, P; Fyffe, M; Gair, J R; Gammaitoni, L; Gaonkar, S; Garufi, F; Gatto, A; Gehrels, N; Gemme, G; Gendre, B; Genin, E; Gennai, A; Gergely, L Á; Ghosh, S; Giaime, J A; Giardina, K D; Giazotto, A; Gleason, J; Goetz, E; Goetz, R; Gondan, L; González, G; Gordon, N; Gorodetsky, M L; Gossan, S; Goßler, S; Gouaty, R; Gräf, C; Graff, P B; Granata, M; Grant, A; Gras, S; Gray, C; Greenhalgh, R J S; Gretarsson, A M; Groot, P; Grote, H; Grunewald, S; Guidi, G M; Guido, C J; Guo, X; Gushwa, K; Gustafson, E K; Gustafson, R; Hacker, J; Hall, E D; Hammond, G; Hanke, M; Hanks, J; Hanna, C; Hannam, M D; Hanson, J; Hardwick, T; Harms, J; Harry, G M; Harry, I W; Hart, M; Hartman, M T; Haster, C -J; Haughian, K; Hee, S; Heidmann, A; Heintze, M; Heinzel, G; Heitmann, H; Hello, P; Hemming, G; Hendry, M; Heng, I S; Heptonstall, A W; Heurs, M; Hewitson, M; Hild, S; Hoak, D; Hodge, K A; Hofman, D; Hollitt, S E; Holt, K; Hopkins, P; Hosken, D J; Hough, J; Houston, E; Howell, E J; Hu, Y M; Huerta, E; Hughey, B; Husa, S; Huttner, S H; Huynh, M; Huynh-Dinh, T; Idrisy, A; Indik, N; Ingram, D R; Inta, R; Islas, G; Isler, J C; Isogai, T; Iyer, B R; Izumi, K; Jacobson, M; Jang, H; Jaranowski, P; Jawahar, S; Ji, Y; Jiménez-Forteza, F; Johnson, W W; Jones, D I; Jones, R; Jonker, R J G; Ju, L; K, Haris; Kalogera, V; Kandhasamy, S; Kang, G; Kanner, J B; Kasprzack, M; Katsavounidis, E; Katzman, W; Kaufer, H; Kaufer, S; Kaur, T; Kawabe, K; Kawazoe, F; Kéfélian, F; Keiser, G M; Keitel, D; Kelley, D B; Kells, W; Keppel, D G; Key, J S; Khalaidovski, A

    2014-01-01

    We describe directed searches for continuous gravitational waves in data from the sixth LIGO science data run. The targets were nine young supernova remnants not associated with pulsars; eight of the remnants are associated with non-pulsing suspected neutron stars. One target's parameters are uncertain enough to warrant two searches, for a total of ten. Each search covered a broad band of frequencies and first and second frequency derivatives for a fixed sky direction. The searches coherently integrated data from the two LIGO interferometers over time spans from 5.3-25.3 days using the matched-filtering F-statistic. We found no credible gravitational-wave signals. We set 95% confidence upper limits as strong (low) as $4\\times10^{-25}$ on intrinsic strain, $2\\times10^{-7}$ on fiducial ellipticity, and $4\\times10^{-5}$ on r-mode amplitude. These beat the indirect limits from energy conservation and are within the range of theoretical predictions for neutron-star ellipticities and r-mode amplitudes.

  8. Photon Bubbles in the Circumstellar Envelopes of Young Massive Stars

    E-Print Network [OSTI]

    N. J. Turner; E. Quataert; H. W. Yorke

    2007-01-28

    We show that the optically-thick dusty envelopes surrounding young high-mass stars are subject to the photon bubble instability. The infrared radiation passing through the envelope amplifies magnetosonic disturbances, with growth rates in our local numerical radiation MHD calculations that are consistent with a linear analysis. Modes with wavelengths comparable to the gas pressure scale height grow by more than two orders of magnitude in a thousand years, reaching non-linear amplitudes within the envelope lifetime. If the magnetic pressure in the envelope exceeds the gas pressure, the instability develops into trains of propagating shocks. Radiation escapes readily through the low-density material between the shocks, enabling accretion to continue despite the Eddington limit imposed by the dust opacity. The supersonic motions arising from the photon bubble instability can help explain the large velocity dispersions of hot molecular cores, while conditions in the shocked gas are suitable for maser emission. We conclude that the photon bubble instability may play a key role in the formation of massive stars.

  9. Do you know the extinction in your young massive cluster?

    E-Print Network [OSTI]

    De Marchi, Guido; Sabbi, Elena

    2015-01-01

    Up to ages of ~100 Myr, massive clusters are still swamped in large amounts of gas and dust, with considerable and uneven levels of extinction. At the same time, large grains (ices?) produced by type II supernovae profoundly alter the interstellar medium (ISM), thus resulting in extinction properties very different from those of the diffuse ISM. To obtain physically meaningful parameters of stars, from basic luminosities and effective temperatures to masses and ages, we must understand and measure the local extinction law. This problem affects all the massive young clusters discussed in his volume. We have developed a powerful method to unambiguously determine the extinction law in an uniform way across a cluster field, using multi-band photometry of red giant stars belonging to the red clump (RC). In the Large Magellanic Cloud, with about 20 RC stars per arcmin^2, we can easily derive a solid and self-consistent absolute extinction curve over the entire wavelength range of the photometry. Here, we present th...

  10. Lyman-break galaxies are they young spheroids?

    E-Print Network [OSTI]

    Matteucci, F

    2002-01-01

    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.

  11. Searches for continuous gravitational waves from nine young supernova remnants

    E-Print Network [OSTI]

    J. Aasi; B. P. Abbott; R. Abbott; T. Abbott; M. R. Abernathy; F. Acernese; K. Ackley; C. Adams; T. Adams; T. Adams; P. Addesso; R. X. Adhikari; V. Adya; C. Affeldt; M. Agathos; K. Agatsuma; N. Aggarwal; O. D. Aguiar; A. Ain; P. Ajith; A. Alemic; B. Allen; A. Allocca; D. Amariutei; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; C. Arceneaux; J. S. Areeda; S. Ast; S. M. Aston; P. Astone; P. Aufmuth; C. Aulbert; B. E. Aylott; S. Babak; P. T. Baker; F. Baldaccini; G. Ballardin; S. W. Ballmer; J. C. Barayoga; M. Barbet; S. Barclay; B. C. Barish; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; J. Bartlett; M. A. Barton; I. Bartos; R. Bassiri; A. Basti; J. C. Batch; Th. S. Bauer; C. Baune; V. Bavigadda; B. Behnke; M. Bejger; C. Belczynski; A. S. Bell; C. Bell; M. Benacquista; J. Bergman; G. Bergmann; C. P. L. Berry; D. Bersanetti; A. Bertolini; J. Betzwieser; S. Bhagwat; R. Bhandare; I. A. Bilenko; G. Billingsley; J. Birch; S. Biscans; M. Bitossi; C. Biwer; M. A. Bizouard; J. K. Blackburn; L. Blackburn; C. D. Blair; D. Blair; S. Bloemen; O. Bock; T. P. Bodiya; M. Boer; G. Bogaert; P. Bojtos; C. Bond; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; Sukanta Bose; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; A. F. Brooks; D. A. Brown; D. D. Brown; N. M. Brown; S. Buchman; A. Buikema; T. Bulik; H. J. Bulten; A. Buonanno; D. Buskulic; C. Buy; L. Cadonati; G. Cagnoli; J. Calderón Bustillo; E. Calloni; J. B. Camp; K. C. Cannon; J. Cao; C. D. Capano; F. Carbognani; S. Caride; S. Caudill; M. Cavaglià; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; R. Chakraborty; T. Chalermsongsak; S. J. Chamberlin; S. Chao; P. Charlton; E. Chassande-Mottin; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; M. Cho; J. H. Chow; N. Christensen; Q. Chu; S. Chua; S. Chung; G. Ciani; F. Clara; J. A. Clark; F. Cleva; E. Coccia; P. -F. Cohadon; A. Colla; C. Collette; M. Colombini; L. Cominsky; M. Constancio, Jr.; A. Conte; D. Cook; T. R. Corbitt; N. Cornish; A. Corsi; C. A. Costa; M. W. Coughlin; J. -P. Coulon; S. Countryman; P. Couvares; D. M. Coward; M. J. Cowart; D. C. Coyne; R. Coyne; K. Craig; J. D. E. Creighton; T. D. Creighton; J. Cripe; S. G. Crowder; A. Cumming; L. Cunningham; E. Cuoco; C. Cutler; K. Dahl; T. Dal Canton; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; L. Dartez; V. Dattilo; I. Dave; H. Daveloza; M. Davier; G. S. Davies; E. J. Daw; R. Day; D. DeBra; G. Debreczeni; J. Degallaix; M. De Laurentis; S. Deléglise; W. Del Pozzo; T. Denker; T. Dent; H. Dereli; V. Dergachev; R. De Rosa; R. T. DeRosa; R. DeSalvo; S. Dhurandhar; M. Díaz; L. Di Fiore; A. Di Lieto; I. Di Palma; A. Di Virgilio; G. Dojcinoski; V. Dolique; E. Dominguez; F. Donovan; K. L. Dooley; S. Doravari; R. Douglas; T. P. Downes; M. Drago; J. C. Driggers; Z. Du; M. Ducrot; S. Dwyer; T. Eberle; T. Edo; M. Edwards; M. Edwards; A. Effler; H. -B. Eggenstein; P. Ehrens; J. Eichholz; S. S. Eikenberry; R. Essick; T. Etzel; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; X. Fan; Q. Fang; S. Farinon; B. Farr; W. M. Farr; M. Favata; M. Fays; H. Fehrmann; M. M. Fejer; D. Feldbaum; I. Ferrante; E. C. Ferreira; F. Ferrini; F. Fidecaro; I. Fiori; R. P. Fisher; R. Flaminio; J. -D. Fournier; S. Franco; S. Frasca; F. Frasconi; Z. Frei; A. Freise; R. Frey; T. T. Fricke; P. Fritschel; V. V. Frolov; S. Fuentes-Tapia; P. Fulda; M. Fyffe; J. R. Gair; L. Gammaitoni; S. Gaonkar; F. Garufi; A. Gatto; N. Gehrels; G. Gemme; B. Gendre; E. Genin; A. Gennai; L. Á. Gergely; S. Ghosh; J. A. Giaime; K. D. Giardina; A. Giazotto; J. Gleason; E. Goetz; R. Goetz; L. Gondan; G. González; N. Gordon; M. L. Gorodetsky; S. Gossan; S. Goßler; R. Gouaty; C. Gräf; P. B. Graff; M. Granata; A. Grant; S. Gras; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; P. Groot; H. Grote; S. Grunewald; G. M. Guidi; C. J. Guido; X. Guo; K. Gushwa; E. K. Gustafson; R. Gustafson; J. Hacker; E. D. Hall; G. Hammond; M. Hanke; J. Hanks; C. Hanna; M. D. Hannam; J. Hanson; T. Hardwick; J. Harms; G. M. Harry; I. W. Harry; M. Hart; M. T. Hartman; C. -J. Haster; K. Haughian; S. Hee; A. Heidmann; M. Heintze; G. Heinzel; H. Heitmann; P. Hello; G. Hemming; M. Hendry; I. S. Heng; A. W. Heptonstall; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; D. Hofman; S. E. Hollitt; K. Holt; P. Hopkins; D. J. Hosken; J. Hough; E. Houston; E. J. Howell; Y. M. Hu; E. Huerta; B. Hughey; S. Husa; S. H. Huttner; M. Huynh; T. Huynh-Dinh; A. Idrisy; N. Indik; D. R. Ingram; R. Inta; G. Islas; J. C. Isler; T. Isogai; B. R. Iyer; K. Izumi; M. Jacobson; H. Jang; P. Jaranowski; S. Jawahar; Y. Ji; F. Jiménez-Forteza; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; Haris K; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; M. Kasprzack; E. Katsavounidis; W. Katzman

    2014-12-18

    We describe directed searches for continuous gravitational waves in data from the sixth LIGO science data run. The targets were nine young supernova remnants not associated with pulsars; eight of the remnants are associated with non-pulsing suspected neutron stars. One target's parameters are uncertain enough to warrant two searches, for a total of ten. Each search covered a broad band of frequencies and first and second frequency derivatives for a fixed sky direction. The searches coherently integrated data from the two LIGO interferometers over time spans from 5.3-25.3 days using the matched-filtering F-statistic. We found no credible gravitational-wave signals. We set 95% confidence upper limits as strong (low) as $4\\times10^{-25}$ on intrinsic strain, $2\\times10^{-7}$ on fiducial ellipticity, and $4\\times10^{-5}$ on r-mode amplitude. These beat the indirect limits from energy conservation and are within the range of theoretical predictions for neutron-star ellipticities and r-mode amplitudes.

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

    E-Print Network [OSTI]

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

    1997-10-31

    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.

  13. The Properties of Young Clusters in M82

    E-Print Network [OSTI]

    L. J. Smith; J. S. Gallagher

    2000-01-31

    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.

  14. Interaction of Infall and Winds in Young Stellar Objects

    E-Print Network [OSTI]

    G. Delamarter; A. Frank; L. Hartmann

    1999-10-14

    The interaction of a stellar or disk wind with a collapsing environment holds promise for explaining a variety of outflow phenomena observed around young stars. In this paper we present the first simulations of these interactions. The focus here is on exploring how ram pressure balance between wind and ambient gas and post-shock cooling affects the shape of the resulting outflows. In our models we explore the role of ram pressure and cooling by holding the wind speed constant and adjusting the ratio of the inflow mass flux to the wind mass flux (Mdot_a/Mdot_w) Assuming non-spherical cloud collapse, we find that relatively strong winds can carve out wide, conical outflow cavities and that relatively weak winds can be strongly collimated into jet-like structures. If the winds become weak enough, they can be cut off entirely by the infalling environment. We identify discrepancies between results from standard snowplow models and those presented here that have important implications for molecular outflows. We also present mass vs. velocity curves for comparison with observations.

  15. Parenting style and older children's and young adolescents' dietary intake and nutritional status 

    E-Print Network [OSTI]

    Kim, Mi Jeong

    2007-09-17

    neglected. The present study examined whether perceived parenting style and its dimensions are associated with older children�s/young adolescents� health outcomes, including self-concept, eating behaviors, physical activity behaviors, energy...

  16. 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

    2014-02-01

    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 ...

  17. Queering young adult literature: examining sexual minorities in contemporary realistic fiction 

    E-Print Network [OSTI]

    Wickens, Corrine Marie

    2009-05-15

    Fiction that incorporates gay, lesbian, bisexual, transgender, or questioning of heterosexuality itself (GLBTQ) themes and characters has been noted among the most widely censored novels for young adults (ALA, 2007; Finnessy, ...

  18. Young Professionals in Nuclear Industry Group Forms at Savannah River Site

    Broader source: Energy.gov [DOE]

    AIKEN, S.C. – Supporting the development of young nuclear professionals in the Central Savannah River Area (CSRA) is the purpose behind a new group forming at the Savannah River Site (SRS).

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

    E-Print Network [OSTI]

    Brown, Joan

    2012-11-29

    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, ...

  20. 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 ...

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

    Office of Scientific and Technical Information (OSTI)

    Third-Harmonic Generation in Graphene Hong, Sung-Young; Dadap, Jerry I.; Petrone, Nicholas; Yeh, Po-Chun; Hone, James; Osgood, Richard M. American Physical Society None USDOE...

  2. The shared experience of adolescent and young adult cancer patients and their caregivers

    E-Print Network [OSTI]

    Juth, V; Silver, RC; Sender, L

    2015-01-01

    young adult survivors of childhood cancer. Oncology Nursingadults with cancer. Journal of Pediatric Oncology Nursing,adults with cancer: Comparing the findings from two qualitative studies. European Journal of Oncology Nursing,

  3. Survey of Brain Variations of Young Adult and Aged B2 (-/-) Knockout Mice 

    E-Print Network [OSTI]

    Kuban, J Katherine

    2008-07-16

    loss and therefore decreased brain area and that this effect would be pronounced in older ?2 (-/-) knockout mice compared to younger mice. Currently, young adult mice (2-3 month old), have been evaluated, and no significant statistical difference...

  4. Engineering and Science Experts Needed to Assist Young People 14 January 2014

    E-Print Network [OSTI]

    Hansen, James E.

    reconstruction of a pipeline that caused a major oil spill. They want to use the necessity defense, their actions for why unconventional fossil fuels should not be developed and likely will harm the future of young

  5. 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

  6. PHYTOREMEDIATION OF CHLORPYRIFOS BY POPULUS AND Keum Young Lee, Stuart E. Strand, and Sharon L. Doty

    E-Print Network [OSTI]

    Doty, Sharon Lafferty

    PHYTOREMEDIATION OF CHLORPYRIFOS BY POPULUS AND SALIX Keum Young Lee, Stuart E. Strand, and Sharon of chlorpyrifos, several plant species of poplar (Populus sp.) and willow (Salix sp.) were investigated

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

    E-Print Network [OSTI]

    Cho, Won Ron

    2008-01-01

    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 ...

  8. A Feminist Dialogue on Theatre for Young Audiences through Suzan Zeder's Plays.

    E-Print Network [OSTI]

    Klein, Jeanne; Austin, Gayle; Zeder, Suzan; Still, James; Smith, Iris

    1997-01-01

    Klein and Austin share perceptions of Theatre for Young Audiences and discuss three plays by Suzan Zeder using feminist dramatic criticism. Zeder responded from her playwright's perspective. Subsequently, playwright James ...

  9. Enhancing Interventions for Pediatric Obesity Among Young Latino Children: A Mixed Methods Study

    E-Print Network [OSTI]

    Sampilo, Marilyn L.

    2014-12-31

    Recent national data indicate that nearly 1/3 of US youth are overweight (BMI % 85th). Of these children, a disproportionate number are Latino. This racial and ethnic disparity has been observed in young childhood and ...

  10. Different effects of dual task demands on the speech of young and older adults

    E-Print Network [OSTI]

    Kemper, Susan; Herman, Ruth; Nartowicz, Jennifer

    2005-12-01

    Young and older adults provided language samples in response to elicitation questions while concurrently performing 3 different tasks. The language samples were scored on three dimensions: fluency, grammatical complexity, and content. Previous...

  11. arXiv:astro-ph/0310394v115Oct2003 Palomar Testbed Interferometer Observations of Young

    E-Print Network [OSTI]

    arXiv:astro-ph/0310394v115Oct2003 Palomar Testbed Interferometer Observations of Young Stellar Cygni. Our K-band (2.2 µm) observations from the Palomar Testbed Interferometer (PTI) used baselines

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

    E-Print Network [OSTI]

    Smith, Rachel K

    2007-01-01

    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 ...

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

    E-Print Network [OSTI]

    Fialka, Justine K B

    2010-06-30

    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 ...

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

    E-Print Network [OSTI]

    Puckett, Stevie

    2013-06-13

    , 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...

  15. I Am the Monster: Self and the Monstrous Feminine in Contemporary Young Adult Literature 

    E-Print Network [OSTI]

    Talafuse, Elizabeth

    2014-05-15

    My dissertation surveys British, American, Australian, and New Zealand young adult texts of the late twentieth and early twenty-first centuries featuring female protagonists who are fantastic monsters. Addressing such texts ...

  16. 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.

    1980-01-01

    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 ...

  17. 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.

    1980-01-01

    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 ...

  18. Assessing the Health Care Needs of Kansas' Young Adults with Disabilities

    E-Print Network [OSTI]

    Hall, Jean P.; Starrett, B.

    2007-08-01

    Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Assessing the Health Care Needs of Kansas' Young Adults with Disabilities Jean Hall; Barbara Starrett Kansas Nurse; Aug 2007; 82, 7; Pro...Reproduced with permission of the copyright owner. Further reproduction prohibited without permission. Assessing the Health Care Needs of Kansas' Young Adults with Disabilities Jean Hall; Barbara Starrett Kansas Nurse; Aug 2007; 82, 7; Pro...

  19. 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

    2006-02-06

    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.

  20. Uranium and thorium decay series disequilibria in young volcanic rocks

    SciTech Connect (OSTI)

    Williams, R.W.

    1988-01-01

    Two of the central questions in igneous geochemistry that study of radioactive disequilibria can help to answer are: what are the rates of magma genesis; and what are the timescales of magma separation and transport. In addition to the temporal information that may be extracted from disequilibria data, the {sup 230}Th/{sup 232}Th of a young rock may be used as a tracer of the Th/U ratio of its source region. Measurements were made by isotope dilution alpha-spectrometry of {sup 238}U, {sup 234}U, {sup 230}Th, and {sup 232}Th in 20 subduction related, 3 oceanic intraplate, and 10 continental intraplate volcanics. {sup 210}Pb was measured in all, {sup 226}Ra was measured in about half, and {sup 228}Th was measured in 10 of the most recent samples. Disequilibrium between {sup 228}Th and {sup 232}Th was found only in the Nacarbonatite samples from Oldoinyo Lengai volcano in Tanzania, which is attributable to {sup 228}Ra/{sup 232}Th {approximately} 27 at the time of eruption. These rocks also have {sup 226}Ra/{sup 230}Th > 60. Three Ra-enrichment models are developed which constrain carbonatite magma formation at less than 20 years before eruption. The effects of different partial melting processes on the {sup 238}U decay series are investigated. If mid-ocean ridge basalts are formed by a dynamic melting process, the {sup 230}Th/{sup 232}Th of the basalts provides a minimum estimate of the Th/U ratio of the source region. The {sup 238}U enrichment in arc volcanics is probably the results of metasomatism of the source by fluids derived from the subducting slab, and the {sup 230}Th enrichment observed for other volcanics is probably due to the partial melting process in the absence of U-bearing fluids.

  1. THE ENIGMATIC YOUNG, LOW-MASS VARIABLE TWA 30

    SciTech Connect (OSTI)

    Looper, Dagny L.; Rayner, John; Pitts, Mark A.; Mohanty, Subhanjoy; Bochanski, John J.; Burgasser, Adam J.; Mamajek, Eric E.; Herczeg, Gregory J.; West, Andrew A.; Faherty, Jacqueline K.; Kirkpatrick, J. Davy

    2010-05-01

    TWA 30 is a remarkable young (7 {+-} 3 Myr), low-mass (0.12 {+-} 0.04 M{sub sun}), late-type star (M5 {+-} 1) residing 42 {+-} 2 pc away from the Sun in the TW Hydrae Association (TWA). It shows strong outflow spectral signatures such as [S II], [O I], [O II], [O III], and Mg I], while exhibiting weak H{alpha} emission (-6.8 {+-} 1.2 A). Emission lines of [S II] and [O I] are common to T Tauri stars still residing in their natal molecular clouds, while [O III] and Mg I] emission lines are incredibly rare in this same population; in the case of TWA 30, these latter lines may arise from new outflow material colliding into older outflow fronts. The weak H{alpha} emission and small radial velocity shifts of line emission relative to the stellar frame of rest (generally {approx_lt}10 km s{sup -1}) suggest that the disk is viewed close to edge-on and that the stellar axis may be inclined to the disk, similar to the AA Tau system, based on its temporal changes in emission/absorption line strengths/profiles and variable reddening (A{sub V} = 1.5-9.0). The strong Li absorption (0.61 {+-} 0.13 A) and common kinematics with members of the TWA confirm its age and membership to the association. Given the properties of this system such as its proximity, low mass, remarkable outflow signatures, variability, and edge-on configuration, this system is a unique case study at a critical time in disk evolution and planet-building processes.

  2. X-ray emitting young stars in the Orion Nebula

    E-Print Network [OSTI]

    Eric D. Feigelson; Patrick Broos; James A. Gaffney III; Gordon Garmire; Lynne A. Hillenbrand; Steven H. Pravdo; Leisa Townsley; Yohko Tsuboi

    2002-03-19

    The Orion Nebula Cluster and the molecular cloud in its vicinity have been observed with the ACIS-I detector on board the Chandra X-ray Observatory with 23 hours exposure. We detect 1075 X-ray sources: 91% are spatially associated with known stellar members of the cluster, and 7% are newly identified deeply embedded cloud members. This provides the largest X-ray study of a pre-main sequence stellar population. We examine here the X-ray properties of Orion young stars as a function of mass. Results include: (a) the discovery of rapid variability in the O9.5 31 M_o star \\theta^2A Ori, and several early B stars, inconsistent with the standard model of X-ray production in small wind shocks; (b) support for the hypothesis that intermediate-mass mid-B through A type stars do not themselves produce significant X-ray emission; (c) confirmation that low-mass G- through M-type T Tauri stars exhibit powerful flaring but typically at luminosities considerably below the `saturation' level; (d) confirmation that the presence or absence of a circumstellar disk has no discernable effect on X-ray emission; (e) evidence that T Tauri plasma temperatures are often very high with T >= 100 MK, even when luminosities are modest and flaring is not evident; and (f) detection of the largest sample of pre-main sequence very low mass objects showing high flaring levels and a decline in magnetic activity as they evolve into L- and T-type brown dwarfs.

  3. A Model for Parent-Teacher Collaboration to Promote Self-Determination in Young Children With Disabilities

    E-Print Network [OSTI]

    Lee, Suk-Hyang; Palmer, Susan B.; Turnbull, Ann P.; Wehmeyer, Michael L.

    2006-01-01

    Curriculum Modifications and Accommodations t s a A Model for Parent-Teacher Collaboration to Promote SeK-Determination in Young Children With Disabilities Suk-Hyang Lee Susan B. Palmer Ann P. TXirnbull Michael L. Wehmeyer Young's mother says she...Curriculum Modifications and Accommodations t s a A Model for Parent-Teacher Collaboration to Promote SeK-Determination in Young Children With Disabilities Suk-Hyang Lee Susan B. Palmer Ann P. TXirnbull Michael L. Wehmeyer Young's mother says she...

  4. 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

    2015-04-09

    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.

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

    E-Print Network [OSTI]

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

    2015-01-01

    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.

  6. ModelML: a Markup Language for Automatic Model Synthesis Cong Zhang Amol Bakshi Viktor K. Prasanna

    E-Print Network [OSTI]

    Hwang, Kai

    are developed based on an exhaustive characterization of the underlying domain, and are used by the designer Management (IAM) project at the Chevron- funded Center for Interactive Smart Oilfield Technologies

  7. Amol Kane, Kevin Budhoo, and Prof. David Sinton (Supervising Professor) Department of Mechanical and Industrial Engineering, University of Toronto

    E-Print Network [OSTI]

    Sun, Yu

    for smaller particles and a more energy-efficient spray method as seen in the cone pattern in Figure 5 and Industrial Engineering, University of Toronto · The Earth Rangers Centre (ERC) uses sustainable building a non-renewable energy source · The location of the humidifier in the building's Heating, Ventilation

  8. PADS: A Policy Architecture for Distributed Storage Systems (Extended) Nalini Belaramani, Jiandan Zheng, Amol Nayate, Robert Soule,

    E-Print Network [OSTI]

    Grimm, Robert

    PADS: A Policy Architecture for Distributed Storage Systems (Extended) Nalini Belaramani, Jiandan architecture for build- ing distributed storage systems. A policy architecture has two aspects. First, a common, a structure for how policies, them- selves, should be specified. In the case of distributed storage systems

  9. Assessing "Dangerous Climate Change": Required Reduction of Carbon Emissions to Protect Young People, Future Generations and Nature

    E-Print Network [OSTI]

    Hansen, James E.

    Assessing "Dangerous Climate Change": Required Reduction of Carbon Emissions to Protect Young high and would subject young people, future generations and nature to irreparable harm. Carbon dioxide. Of course carbon dioxide from deforestation also causes warming and policies must address that carbon source

  10. Deformation zone `jumps' in a young convergent setting; the Lengguru fold-and-thrust belt, New Guinea Island

    E-Print Network [OSTI]

    Nicolas, Chamot-Rooke

    Deformation zone `jumps' in a young convergent setting; the Lengguru fold-and-thrust belt, New The Lengguru fold-and-thrust belt in West Papua (Indonesia) has all the characteristics of a young orogen buttress. The construction of these two wedges is younger than 11 Myr. The structures of the Lengguru belt

  11. Caffeine and stress alter salivary a-amylase activity in young men Laura C. Klein1*, Jeanette M. Bennett1

    E-Print Network [OSTI]

    Ritter, Frank

    Caffeine and stress alter salivary a-amylase activity in young men Laura C. Klein1*, Jeanette M and a psychological stressor on salivary a-amylase (sAA) in healthy young males (age 18­ 30 years) who consumed. Copyright # 2010 John Wiley & Sons, Ltd. key words -- blood pressure; caffeine; heart rate; salivary alpha-amylase

  12. 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

  13. ORIGINAL ARTICLE -H2AX foci are increased in lymphocytes in vivo in young

    E-Print Network [OSTI]

    Brenner, David Jonathan

    very low ionizing radiation exposure doses from CT exams can induce -H2AX formation in vivo in young children. Objective To test whether very low ionizing radiation doses from CT exams can induce lymphocytic low-dose X-irradiation: a pilot study Brunhild M. Halm & Adrian A. Franke & Jennifer F. Lai & Helen C

  14. Anorexia nervosa during adolescence and young adulthood: Towards a developmental and integrative approach sensitive to

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    1 Anorexia nervosa during adolescence and young adulthood: Towards a developmental and integrative of print" DOI : 10.1016/j.jphysparis.2013.03.010 #12;2 Abstract Anorexia nervosa is situated of the underlying mental disorder. Taken together, these observations support an approach to anorexia nervosa

  15. Murder Mystery Day Day event for young people in care in school years 10-13

    E-Print Network [OSTI]

    Jackson, Sophie

    Murder Mystery Day Day event for young people in care in school years 10-13 Develop your scientific investigative skills while investigating a fiendish crime! Take part in solving a murder mystery activity, plus: Saturday 11 July 2015 www.cam.ac.uk/care-events #12;Murder Mystery Day www

  16. Carbon fluxes in a young, naturally regenerating jack pine ecosystem Eugenie S. Euskirchen

    E-Print Network [OSTI]

    Chen, Jiquan

    , are measurements within young, recently disturbed ecosystems. [3] Generally, net ecosystem productivity (NEP, or equiv- alently, net ecosystem exchange of carbon, NEE = ­NEP; where a positive value of NEP indicates a C uptake, or equivalently, a C sink, and a negative value of NEP indicates a C loss, or equivalently

  17. Instructor: Brad de Young Physics and Physical Oceanography bdeyoung@physics.mun.ca

    E-Print Network [OSTI]

    deYoung, Brad

    Instructor: Brad de Young Physics and Physical Oceanography bdeyoung@physics.mun.ca Room C-3000 737-8738 This course will cover data analysis techniques in oceanography. We will cover some basic time-series analysis for this paper: (i) Maximum Entropy Analysis, (ii) Neural networks, (iii) Oceanography 6316 ­ Winter 2007 Physics

  18. An adult pine weevil feeding on the bark of the main stem of a young tree.

    E-Print Network [OSTI]

    Figure 1 An adult pine weevil feeding on the bark of the main stem of a young tree. 1 P R A C T I C forest sites after clearfelling. Typically, adult weevils feed on bark of the main stem (Figure 1 of attack, the main management alternatives are to delay planting, to restock with pre- treated trees or

  19. 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

  20. 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

  1. 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

  2. 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

  3. 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

  4. 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

  5. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.139) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.139) Track: Technical VARIABLE SPEED WIND TURBINES ­ FAULT RIDE-THROUGH AND GRID SUPPORT CAPABILITIES is on the fault ride through and grid support capability of variable speed wind turbines. The paper focuses

  6. Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.141) Track: Technical

    E-Print Network [OSTI]

    Session: Poster Session + Poster Award + Scientific Award + Excellent young wind doctor award (PO.141) Track: Technical MODELLING AND FAULT RIDE-THROUGH CAPABILITY OF A FULL CONVERTER WIND TURBINE WITH MULTI-POLE PMSG (abstract-ID: 114) Anca Hansen (Risø DTU, Wind Energy Department, Denmark) Gabriele

  7. Earth's Glow on the Young Moon: A Conjecture on the Lunar Farside Asymmetry

    E-Print Network [OSTI]

    Rhoads, James

    Earth's Glow on the Young Moon: A Conjecture on the Lunar Farside Asymmetry Arpita Roy & Jason of the Moon with the Earth" by Stigmatella aurantiaca Licensed under CC BY-SA 3.0 via Wikimedia Commons File:Tidal_locking_of_the_Moon_with_the_Earth Hypothesis: Moon formed from impact of Mars sized protoplanet, "Theia", with proto-earth Moon formed from

  8. Chinese-English Code-switching in Blogs by Macao Young People 

    E-Print Network [OSTI]

    San, Hong Ka

    2009-11-26

    This paper attempts to investigate Chinese-English code-switching behaviour present in blogs (a kind of computer-mediated communication) belonging to young people in Macao. The first goal of this study is to describe the patterns of Chinese...

  9. Study of Latina Mothers' Coping Processes While Their Young Adult Sons Are Incarcerated

    E-Print Network [OSTI]

    Hayes-Bautista, Teodocia Maria

    2013-01-01

    Mexican American adults. Oncology Nursing Forum 36, 413-420Adult Sons Are Incarcerated by Teodocia Maria Hayes-Bautista Doctor of Philosophy in NursingNursing Research so that I can understand how Latina mothers cope while their young adult

  10. An experience of young software engineers' employability in the Moroccan offshore industry

    E-Print Network [OSTI]

    Brest, Université de

    An experience of young software engineers' employability in the Moroccan offshore industry Philippe the emergence of an offshore software development industry in Morocco. A network of eight Moroccan universities and the University of Brest has set up a mobility scheme for Moroccan Master students. The OTI programme "Offshoring

  11. Implicit Learning of Predictive Relationships in Three-Element Visual Sequences by Young and Old Adults

    E-Print Network [OSTI]

    Dennis, Nancy

    sequence task and illustrate its utility for investi- gating procedural learning in healthy old adultsImplicit Learning of Predictive Relationships in Three-Element Visual Sequences by Young and Old Adults James H. Howard Jr. The Catholic University of America and Georgetown University Darlene V. Howard

  12. Climate signal age effects--Evidence from young and old trees in the Swiss Engadin

    E-Print Network [OSTI]

    Esper, Jan

    Climate signal age effects--Evidence from young and old trees in the Swiss Engadin Jan Esper a of these long-term records are composed of >1000- year old living trees, such as the reconstructions from different climatic information than ``adult'' rings that are typically defined as being older than 50

  13. Enhanced Teleoperation for D&D Young S. Park, Hyosig Kang, Thomas F. Ewing

    E-Print Network [OSTI]

    Amaral, Luis A.N.

    Enhanced Teleoperation for D&D Young S. Park, Hyosig Kang, Thomas F. Ewing Nuclear Engineering-based control architecture and cobot control technology. Keywords ­ teleoperation, teleautonomy Platform (DAWP) system for dismantling the CP-5 reactor internals at Argonne National Laboratory. Despite

  14. Ph.D in Economics at the Andrew Young School, Georgia State University

    E-Print Network [OSTI]

    Frantz, Kyle J.

    Ph.D in Economics at the Andrew Young School, Georgia State University WHY Georgia State University's Department of Economics? We are part of one of America's best public affairs graduate schools: the Andrew in scholarly journals including Econometrica, American Economic Review, Journal of Political Economy, Quarterly

  15. iD Tech needs your help to inspire more young women to enter the

    E-Print Network [OSTI]

    Oviedo, Néstor J.

    -18 as well as a new all-girls option (Alexa Café for ages 10-15). At Alexa Café, we also emphasize techiD Tech needs your help to inspire more young women to enter the tech industry and make their voices and ideas heard. iD Tech is determined to help reshape the face of the tech industry by providing

  16. Loyalty Fund + for deceased donors | ^ for young alumni 2014 Loyalty Fund Honor Roll | page 2

    E-Print Network [OSTI]

    Holliday, Mark A.

    Roll | page 2 2013­2014 Donors The 2014 Loyalty Fund Honor Roll includes alumni, friends and parents Steed Gold Scholars: $1,000-$4,999 Katherine Abbott-Beam '67 and David Beam Cynthia H. '71 and Robert H `77 Alan T. '69 and Cynthia Yount #12;+ for deceased donors | ^ for young alumni 2014 Loyalty Fund

  17. Basin-Wavelength Equatorial Deep Jet Signals Across Three Oceans1 Madeleine K. Youngs2

    E-Print Network [OSTI]

    Johnson, Gregory C.

    of intermediate and deep water masses in the Atlantic. Brandt et al. (2011, 2012) argue38 that as wellBasin-Wavelength Equatorial Deep Jet Signals Across Three Oceans1 Madeleine K. Youngs2 NOAA/Pacific Marine Environmental Laboratory, Seattle WA and Environmental Science and Engineering, California

  18. Virus Calculated as Culprit Killing Sea Stars By Ben Young Landis

    E-Print Network [OSTI]

    Virus Calculated as Culprit Killing Sea Stars By Ben Young Landis [Reprinted from USGS Science Features: Top Story, November 17, 2014, virus://soundwaves.usgs.gov/ (Virus Killing Sea Stars continued on page 2) Sound Waves Volume FY 2015, Issue No. 156156 January

  19. In today's world, financial education is crucial; however, many young people are leaving high school lacking

    E-Print Network [OSTI]

    Relevance In today's world, financial education is crucial; however, many young people are leaving say students are prepared to deal with the financial challenges awaiting them in the adult world. More The Welcome to the Real World! (WTTRW) program consists of two parts: financial education and real-world

  20. http://valhalla.chem.udel.edu/YSA.pdf Philadelphia Multi-Stake -Young Single Adult

    E-Print Network [OSTI]

    Firestone, Jeremy

    http://valhalla.chem.udel.edu/YSA.pdf Philadelphia Multi-Stake - Young Single Adult Comprising the Stakes in Cherry Hill NJ, Philadelphia PA, Reading PA, Valley Forge PA and Wilmington DE Please send at 3913 Chestnut Street, Philadelphia, at 5:00. Be prompt, as the activity will move on from there. Bring

  1. YOUNG MEASURES AND ORDER-DISORDER TRANSITION IN STATIONARY FLOW OF LIQUID CRYSTALS

    E-Print Network [OSTI]

    Panchenko, Alexander

    YOUNG MEASURES AND ORDER-DISORDER TRANSITION IN STATIONARY FLOW OF LIQUID CRYSTALS M. CARME measures generated by sequences of weak solutions of the governing equations. It is experimentally well [-1, 1] with R2 Ã? (-1, 1), representing the domain of the flow. The governing system is highly

  2. YOUNG MEASURES AND ORDER-DISORDER TRANSITION IN STATIONARY FLOW OF LIQUID CRYSTALS

    E-Print Network [OSTI]

    YOUNG MEASURES AND ORDER-DISORDER TRANSITION IN STATIONARY FLOW OF LIQUID CRYSTALS By M. Carme AND ORDER-DISORDER TRANSITION IN STATIONARY FLOW OF LIQUID CRYSTALS M. CARME CALDERER AND ALEXANDER of the governing equations. It is experimentally well known that liquid crystal flows with large Ericksen number

  3. 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

  4. Cold gas and the disruptive effect of a young radio jet

    E-Print Network [OSTI]

    Morganti, R; Maccagni, F M; Gereb, K; Oonk, J B R; Tadhunter, C N

    2015-01-01

    Newly born and young radio sources are in a delicate phase of their life. Their jets are fighting their way through the surrounding gaseous medium, strongly experiencing this interaction while, at the same time, impacting and affecting the interstellar medium (ISM). Here we present the results from two studies of HI (in absorption) and molecular gas illustrating what can be learned from these phases of the gas. We first describe a statistical study with the WSRT. The study shows that the young radio sources not only have an higher detection rate of HI, but also systematically broader and more asymmetric HI profiles, most of them blueshifted. This supports the idea that we are looking at young radio jets making their way through the surrounding ISM, which also appears to be, on average, richer in gas than in evolved radio sources. Signatures of the impact of the jet are seen in the kinematics of the gas. However, even among the young sources, we identify a population that remains undetected in HI even after st...

  5. 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

  6. 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

  7. Brown Dwarf Companions to Young Solar Analogs: An Adaptive Optics Survey Using Palomar and Keck

    E-Print Network [OSTI]

    Metchev, Stanimir

    Brown Dwarf Companions to Young Solar Analogs: An Adaptive Optics Survey Using Palomar and Keck to its present state, had it not been for the dedication and professionalism of the Palomar and Keck possibilities offered by the technology. Rich and Hal also helped me design the Palomar AO astrometric

  8. 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

  9. Technical NoteYoung Investigator's Award, 8th World Biomaterials Congress, Amsterdam RAI, The Netherlands,

    E-Print Network [OSTI]

    Lu, Helen H.

    Technical NoteYoung Investigator's Award, 8th World Biomaterials Congress, Amsterdam RAI Stephen B. Doty,3 X. Edward Guo,4 Scott A. Rodeo,2 Helen H. Lu1,5 1 Biomaterials and Interface Tissue of Dental Medicine, Columbia University, New York, New York 10032 Received 18 January 2008; accepted 12

  10. 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

  11. Chaos in the Solar Cycle: using data to drive predictions Matthew Young

    E-Print Network [OSTI]

    Chaos in the Solar Cycle: using data to drive predictions Matthew Young May 21, 2012 Abstract This report presents first steps at applying chaos theory to the solar activity cycle. We provide brief­scale turbulence, and it goes through two noteworthy cycles: The 11­year (Schwabe) activity cycle, and the 22­year

  12. Frosh senator ignores `Rubio for VP' push Tea partyers, establishment like what they see in young

    E-Print Network [OSTI]

    Fernandez, Eduardo

    Frosh senator ignores `Rubio for VP' push Tea partyers, establishment like what they see in young the dapper, articulate and ambitious Miami native -- who is admired by tea party activists and the party] is somebody that is beloved by the tea party who holds statewide office in a swing state and, oh, is Hispanic

  13. 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

  14. 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

  15. A Comparative Analysis of Mestizo and Indigenous Mayan Young Women in Guatemala: Attitudes and Knowledge of Sexual Reproduction and Health among Members of Children International's Youth Health Corps

    E-Print Network [OSTI]

    Trapp, Sarah Casement

    2011-04-21

    youth in Guatemala participate in the program together. In this comparative analysis of Kaqchikel Maya young women and non–indigenous young women in Guatemala, a written anonymous survey was administered to both groups of female participants to determine...

  16. 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

  17. Structural Transitions of Electrosprayed Ubiquitin Ions Stored in an Ion Trap over 10 ms Sunnie Myung, Ethan R. Badman, Young Jin Lee, and David E. Clemmer*

    E-Print Network [OSTI]

    Clemmer, David E.

    s Sunnie Myung, Ethan R. Badman, Young Jin Lee, and David E. Clemmer* Department of Chemistry, Indiana Uni

  18. A Disk of Young Stars at the Galactic Center as Determined by Individual Stellar Orbits

    E-Print Network [OSTI]

    J. R. Lu; A. M. Ghez; S. D. Hornstein; M. R. Morris; E. E. Becklin; K. Matthews

    2008-08-28

    We present new proper motions from the 10 m Keck telescopes for a puzzling population of massive, young stars located within 3.5" (0.14 pc) of the supermassive black hole at the Galactic Center. Our proper motion measurements have uncertainties of only 0.07 mas/yr (3 km/s), which is ~7 times better than previous proper motion measurements for these stars, and enables us to measure accelerations as low as 0.2 mas/yr^2 (7 km/s/yr). Using these measurements, line-of-sight velocities from the literature, and 3D velocities for additional young stars in the central parsec, we constrain the true orbit of each individual star and directly test the hypothesis that the massive stars reside in two stellar disks as has been previously proposed. Analysis of the stellar orbits reveals only one of the previously proposed disks of young stars using a method that is capable of detecting disks containing at least 7 stars. The detected disk contains 50% of the young stars, is inclined by ~115 deg from the plane of the sky, and is oriented at a position angle of ~100 deg East of North. Additionally, the on-disk and off-disk populations have similar K-band luminosity functions and radial distributions that decrease at larger projected radii as \\propto r^-2. The disk has an out-of-the-disk velocity dispersion of 28 +/- 6 km/s, which corresponds to a half-opening angle of 7 +/- 2 deg, and several candidate disk members have eccentricities greater than 0.2. Our findings suggest that the young stars may have formed in situ but in a more complex geometry than a simple, thin circular disk.

  19. Young Low-Mass Stars and Brown Dwarfs in IC 348

    E-Print Network [OSTI]

    K. L. Luhman

    1999-05-21

    I present new results from a continuing program to identify and characterize the low-mass stellar and substellar populations in the young cluster IC 348 (1-10~Myr). Optical spectroscopy has revealed young objects with spectral types as late as M8.25. The intrinsic J-H and H-K colors of these sources are dwarf-like, whereas the R-I and I-J colors appear intermediate between the colors of dwarfs and giants. Furthermore, the spectra from 6500 to 9500 A are reproduced well with averages of standard dwarf and giant spectra, suggesting that such averages should be used in the classification of young late-type sources. An H-R diagram is constructed for the low-mass population in IC 348 (K6-M8). The presumably coeval components of the young quadruple system GG~Tau (White et al.) and the locus of stars in IC 348 are used as empirical isochrones to test the theoretical evolutionary models. For the models of Baraffe et al., an adjustment of the temperature scale to progressively warmer temperatures at later M types, intermediate between dwarfs and giants, brings all components of GG~Tau onto the same model isochrone and gives the population of IC 348 a constant age and age spread as a function of mass. When other observational constraints are considered, such as the dynamical masses of GM~Aur, DM~Tau, and GG~Tau~A, the models of Baraffe et al. are the most consistent with observations of young systems. With compatible temperature scales, the models of both D'Antona & Mazzitelli and Baraffe et al. suggest that the hydrogen burning mass limit occurs near M6 at ages of <10 Myr. Thus, several likely brown dwarfs are discovered in this study of IC 348, with masses down to ~20-30 M_J.

  20. Magnetic complexity as an explanation for bimodal rotation populations among young stars

    E-Print Network [OSTI]

    Garraffo, Cecilia; Cohen, Ofer

    2015-01-01

    Observations of young open clusters have revealed a bimodal distribution of fast and slower rotation rates that has proven difficult to explain with predictive models of spin down that depend on rotation rates alone. The Metastable Dynamo Model proposed recently by Brown, employing a stochastic transition probability from slow to more rapid spin down regimes, appears to be more successful but lacks a physical basis for such duality. Using detailed 3D MHD wind models computed for idealized multipole magnetic fields, we show that surface magnetic field complexity can provide this basis. Both mass and angular momentum losses decline sharply with increasing field complexity. Combined with observation evidence for complex field morphologies in magnetically active stars, our results support a picture in which young, rapid rotators lose angular momentum in an inefficient way because of field complexity. During this slow spin-down phase, magnetic complexity is eroded, precipitating a rapid transition from weak to str...

  1. Debris Disks in Nearby Young Moving Groups in the ALMA Era

    E-Print Network [OSTI]

    Kóspál, Á

    2015-01-01

    Many members of nearby young moving groups exhibit infrared excess attributed to circumstellar debris dust, formed via erosion of planetesimals. With their proximity and well-dated ages, these groups are excellent laboratories for studying the early evolution of debris dust and of planetesimal belts. ALMA can spatially resolve the disk emission, revealing the location and extent of these belts, putting constraints on planetesimal evolution models, and allowing us to study planet-disk interactions. While the main trends of dust evolution in debris disks are well-known, there is almost no information on the evolution of gas. During the transition from protoplanetary to debris state, even the origin of gas is dubious. Here we review the exciting new results ALMA provided by observing young debris disks, and discuss possible future research directions.

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

    E-Print Network [OSTI]

    M. Ruderman

    2003-10-28

    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.

  3. Isochronal age scale of young moving groups in the solar neighbourhood

    E-Print Network [OSTI]

    Bell, Cameron P M; Naylor, Tim

    2015-01-01

    We present a self-consistent, absolute isochronal age scale for young (< 200 Myr), nearby (< 100 pc) moving groups, which is consistent with recent lithium depletion boundary ages for both the Beta Pic and Tucana-Horologium moving groups. This age scale was derived using a set of semi-empirical pre-main-sequence model isochrones that incorporate an empirical colour-Teff relation and bolometric corrections based on the observed colours of Pleiades members, with theoretical corrections for the dependence on log g. Absolute ages for young, nearby groups are vital as these regions play a crucial role in our understanding of the early evolution of low- and intermediate-mass stars, as well as providing ideal targets for direct imaging and other measurements of dusty debris discs, substellar objects and, of course, extrasolar planets.

  4. 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; Riedel, Adric E-mail: doyon@astro.umontreal.ca E-mail: artigau@astro.umontreal.ca E-mail: baron@astro.umontreal.ca

    2013-01-10

    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.

  5. IDENTIFYING THE YOUNG LOW-MASS STARS WITHIN 25 pc. II. DISTANCES, KINEMATICS, AND GROUP MEMBERSHIP

    SciTech Connect (OSTI)

    Shkolnik, Evgenya L.; Anglada-Escude, Guillem; Liu, Michael C.; Bowler, Brendan P.; Weinberger, Alycia J.; Boss, Alan P.; Reid, I. Neill; Tamura, Motohide

    2012-10-10

    We have conducted a kinematic study of 165 young M dwarfs with ages of {approx}<300 Myr. Our sample is composed of stars and brown dwarfs with spectral types ranging from K7 to L0, detected by ROSAT and with photometric distances of {approx}<25 pc assuming that the stars are single and on the main sequence. In order to find stars kinematically linked to known young moving groups (YMGs), we measured radial velocities for the complete sample with Keck and CFHT optical spectroscopy and trigonometric parallaxes for 75 of the M dwarfs with the CAPSCam instrument on the du Pont 2.5 m Telescope. Due to their youthful overluminosity and unresolved binarity, the original photometric distances for our sample underestimated the distances by 70% on average, excluding two extremely young ({approx}<3 Myr) objects found to have distances beyond a few hundred parsecs. We searched for kinematic matches to 14 reported YMGs and identified 10 new members of the AB Dor YMG and 2 of the Ursa Majoris group. Additional possible candidates include six Castor, four Ursa Majoris, two AB Dor members, and one member each of the Her-Lyr and {beta} Pic groups. Our sample also contains 27 young low-mass stars and 4 brown dwarfs with ages {approx}<150 Myr that are not associated with any known YMG. We identified an additional 15 stars that are kinematic matches to one of the YMGs, but the ages from spectroscopic diagnostics and/or the positions on the sky do not match. These warn against grouping stars together based only on kinematics and that a confluence of evidence is required to claim that a group of stars originated from the same star-forming event.

  6. DISCOVERY OF X-RAY EMISSION FROM YOUNG SUNS IN THE SMALL MAGELLANIC CLOUD

    SciTech Connect (OSTI)

    Oskinova, L. M.; Hainich, R. [Institute for Physics and Astronomy, University Potsdam, D-14476 Potsdam (Germany)] [Institute for Physics and Astronomy, University Potsdam, D-14476 Potsdam (Germany); Sun, W.; Chen, Y. [Department of Astronomy, Nanjing University, Nanjing, 210093 Jiangsu (China)] [Department of Astronomy, Nanjing University, Nanjing, 210093 Jiangsu (China); Evans, C. J. [UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom)] [UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Henault-Brunet, V. [Scottish Universities Physics Alliance (SUPA), Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom)] [Scottish Universities Physics Alliance (SUPA), Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Chu, Y.-H.; Gruendl, R. A. [Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801 (United States)] [Department of Astronomy, University of Illinois, 1002 West Green Street, Urbana, IL 61801 (United States); Gallagher, J. S. III [Department of Astronomy, University of Wisconsin-Madison, 5534 Sterling, 475 North Charter Street, Madison, WI 53706 (United States)] [Department of Astronomy, University of Wisconsin-Madison, 5534 Sterling, 475 North Charter Street, Madison, WI 53706 (United States); Guerrero, M. A. [Instituto de Astrofisica de Andalucia, IAA-CSIC, Glorieta de la Astronomia s/n, E-18008 Granada (Spain)] [Instituto de Astrofisica de Andalucia, IAA-CSIC, Glorieta de la Astronomia s/n, E-18008 Granada (Spain); Guedel, M. [Department of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, A-1180 Vienna (Austria)] [Department of Astrophysics, University of Vienna, Tuerkenschanzstrasse 17, A-1180 Vienna (Austria); Silich, S. [Instituto Nacional de Astrofisica Optica y Electronica, AP 51, 72000 Puebla (Mexico)] [Instituto Nacional de Astrofisica Optica y Electronica, AP 51, 72000 Puebla (Mexico); Naze, Y. [GAPHE, Departement AGO, Universite de Liege, Allee du 6 Aout 17, Bat. B5C, B-4000 Liege (Belgium)] [GAPHE, Departement AGO, Universite de Liege, Allee du 6 Aout 17, Bat. B5C, B-4000 Liege (Belgium); Reyes-Iturbide, J. [LATO-DCET/Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, km 16, 45662-000 Ilheus, BA (Brazil)] [LATO-DCET/Universidade Estadual de Santa Cruz, Rodovia Jorge Amado, km 16, 45662-000 Ilheus, BA (Brazil)

    2013-03-01

    We report the discovery of extended X-ray emission within the young star cluster NGC 602a in the Wing of the Small Magellanic Cloud (SMC) based on observations obtained with the Chandra X-Ray Observatory. X-ray emission is detected from the cluster core area with the highest stellar density and from a dusty ridge surrounding the H II region. We use a census of massive stars in the cluster to demonstrate that a cluster wind or wind-blown bubble is unlikely to provide a significant contribution to the X-ray emission detected from the central area of the cluster. We therefore suggest that X-ray emission at the cluster core originates from an ensemble of low- and solar-mass pre-main-sequence (PMS) stars, each of which would be too weak in X-rays to be detected individually. We attribute the X-ray emission from the dusty ridge to the embedded tight cluster of the newborn stars known in this area from infrared studies. Assuming that the levels of X-ray activity in young stars in the low-metallicity environment of NGC 602a are comparable to their Galactic counterparts, then the detected spatial distribution, spectral properties, and level of X-ray emission are largely consistent with those expected from low- and solar-mass PMS stars and young stellar objects (YSOs). This is the first discovery of X-ray emission attributable to PMS stars and YSOs in the SMC, which suggests that the accretion and dynamo processes in young, low-mass objects in the SMC resemble those in the Galaxy.

  7. Russian-Estonian Code-Switching Among Young Estonian Russians: Developing a Mixed Linguistic Identity

    E-Print Network [OSTI]

    Zabrodskaja, Anastassia

    2006-01-01

    RUSSIAN-ESTONIAN CODE-SWITCHING AMONG YOUNG ESTONIAN RUSSIANS: DEVELOPING A MIXED LINGUISTIC IDENTITY? Anastassia Zabrodskaja Tallinn University Introduction The study is concerned with conversational functions of Russian-Estonian code...- switching in Kohtla-J?rve, which is a specific region in terms of population structure: Estonians from 20.9 % and Russians 79.1 %. The demographic situation is not homogenous throughout the whole Estonian territory. There are predominantly Russian...

  8. The impact of education in shaping lives: reflections of young people with disabilities in Ghana

    E-Print Network [OSTI]

    Singal, Nidhi; Salifu, Edward Mahama; Iddrisu, Khadijatu; Casely-Hayford, Leslie; Lundebye, Helen

    2015-03-11

    employees with disabilities. Furthermore, they noted that most Ghanaians tend to ‘admire disable people who engage in productive activities and view those who resort to begging as a source of work as lazy and indeed ‘disabled’’ (p. 58). Given... with opportunities to make a positive contribution to society. Abbink, J. 2005. Being young in Africa: the politics of despair and renewal. Retrieved from: https://openaccess.leidenuniv.nl/bitstream/handle/1887/9608/ASC_1242160_167.pdf? sequence=1...

  9. The BANYAN All-Sky Survey for Brown Dwarf Members of Young Moving Groups

    E-Print Network [OSTI]

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

    2015-01-01

    We describe in this work the BASS survey for brown dwarfs in young moving groups of the solar neighborhood, and summarize the results that it generated. These include the discovery of the 2MASS J01033563-5515561 (AB)b and 2MASS J02192210-3925225 B young companions near the deuterium-burning limit as well as 44 new low-mass stars and 69 new brown dwarfs with a spectroscopically confirmed low gravity. Among those, ~20 have estimated masses within the planetary regime, one is a new L4 $\\gamma$ bona fide member of AB Doradus, three are TW Hydrae candidates with later spectral types (L1-L4) than all of its previously known members and six are among the first contenders to low-gravity $\\geq$ L5 $\\beta$/$\\gamma$ brown dwarfs, reminiscent of WISEP J004701.06+680352.1, PSO J318.5338-22.8603 and VHS J125601.92-125723.9 b. Finally, we describe a future version of this survey, BASS-Ultracool, that will specifically target $\\geq$ L5 candidate members of young moving groups. First experimentations in designing the survey h...

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

    E-Print Network [OSTI]

    Mueller, Carrie

    2012-02-14

    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...

  11. "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)

    2005-01-01

    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 ...

  12. Young children's perceptions and constructions of social identities and social implications: promoting social justice in early childhood 

    E-Print Network [OSTI]

    Konstantoni, Kristina

    2011-07-04

    multiple understandings of parts of social identities (e.g. multiple 'masculinities' and 'femininities') in early childhood. There has also been a need for further research to explore how young children‘s intersected social identities may impact...

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

    E-Print Network [OSTI]

    Megerson, Susan C.

    2010-07-23

    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 loss. One hundred fourteen...

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

    E-Print Network [OSTI]

    Kim, Hye Jeong

    2009-05-15

    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...

  15. RNA-Seq Approach for Genetic Improvement of Meat Quality in Pig and Evolutionary Insight into the Substrate

    E-Print Network [OSTI]

    Lee, Keun Woo

    Chung1,2 , Young Min Song1,2 , Il Suk Kim1,2 , Sang Keun Jin1,2 , Doo Hwan Kim1,2 , Seung-Won Lee3 , Keun Woo Lee4,5 , Woo Young Bang2 *, Chul Wook Kim1,2 * 1 Department of Animal Resources Technology

  16. "So the Kids Won't Understand": Inherited Futures of Jewish Women Writers

    E-Print Network [OSTI]

    Weiman-Kelman, Zohar Eeda

    2012-01-01

    I   offer  a  queer  genealogy   based  on  nonlinear  encounters.   This   genealogy   serves   as   an  offer   an   affective   genealogy   based   on   erotic  

  17. Accelerating In-Page Logging with Non-Volatile Memory Sang-Won Lee

    E-Print Network [OSTI]

    Moon, Bongki

    memory. We report a few advantages of this new design that will make IPL more suitable for flash memory competitive in both capacity and price. In this paper, we present an improved design of In-Page Logging (IPL) by augmenting it with phase change RAM (PCRAM) in its log area. IPL is a buffer and storage man- agement

  18. A scalable high-order discontinuous Galerkin method for global atmospheric modeling Hae-Won Choia

    E-Print Network [OSTI]

    Nair, Ramachandran D.

    system model will require a highly scalable and accurate flux-form formulation of atmospheric dynamics supercomputers. 1. INTRODUCTION The future evolution of the Community Climate System Model (CCSM) into an Earth

  19. When revenue decoupling will work... and when it won't

    SciTech Connect (OSTI)

    Kihm, Steven

    2009-10-15

    As long as the Averch-Johnson effect continues to hold - which it likely will for many utilities - it may be difficult to persuade such utilities to abandon large-scale supply-side construction plans in favor of aggressive promotion of energy efficiency, even if a decoupling mechanism is in place. (author)

  20. A Harmonic-Rejecting CMOS LNA for Broadband Radios Joung Won Park and Behzad Razavi

    E-Print Network [OSTI]

    Razavi, Behzad

    signal at f1, amplify the blocker at 3f1, and subtract the result from the main path. This third reaching the summing node. Note that the noise contribution of A1 at f1 is minimal owing to its low gain at this frequency. Located at f1, the three zero frequencies in Fig. 2 pro- duce some phase shift at 3f1

  1. Data-driven Control of Flapping Flight EUNJUNG JU and JUNGDAM WON and JEHEE LEE

    E-Print Network [OSTI]

    Lee, Jehee

    in high-speed videos (see Figure 3). 3.2 System Overview Our flight control system consists of three main graphs that vary in its shape, amplitude, and phase (see Figure 5). We use a parametrized wingbeat model the controller from the first phase for random control tasks. In Figure 10, we plotted the outputs (P

  2. Molecular interaction between parkin and PINK1 in mammalian neuronal cells Ji Won Um a

    E-Print Network [OSTI]

    Lübbert, Hermann

    Available online 8 January 2009 Keywords: Parkinson's disease Parkin PINK1 Lewy bodies Proteasome Parkinson Elsevier Inc. All rights reserved. Introduction Parkinson disease (PD) is a devastating neurodegenerative-749, Republic of Korea b Brain Disease Research Center, Institute for Medical Science, Ajou University School

  3. Mimi Koehl has won many accolades for her research, including a

    E-Print Network [OSTI]

    Koehl, Mimi

    environment. Gleaning design principles from living things is her stock in trade. Koehl is now working then put the robot downstream from an odor source in a big flow tank where she could mimic the turbulent filaments so the lobster can process the odor. Calculations of the fluid dynamics confirmed her findings

  4. Mesh Resolution Augmentation using 3D Skin Bank Won-Sook Lee*

    E-Print Network [OSTI]

    Lee, WonSook

    of Engineering, University of Ottawa, 800 King Edward Avenue, Ottawa, ON, Canada K1N 6N5 Abstract We present 3D American and European Surface Anthropometry Res

  5. City of Chicago won't sweat the flu with Argonne's help | Argonne...

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

    on their toes." This particular exercise followed the spread of an imaginary flu from Egypt. By the time the flu "arrived" in Chicago, more than 15,000 cases had been reported...

  6. How the green guys won : interest group strategies & the California Clean Cars Legislation

    E-Print Network [OSTI]

    Paine, Carli

    2005-01-01

    In July of 2002, the California State Legislature passed the "California Clean Cars Bill," the first law in the United States to regulate carbon dioxide as a vehicular pollutant. California's vehicular standards have ...

  7. Making H-Anim bodies Won-Sook Lee, Taro Goto, Nadia Magnenat-Thalmann

    E-Print Network [OSTI]

    Lee, WonSook

    virtual human and H- Anim compatible bodies are able to be visualized in any VRML97 compliant browser, to make an H-Anim compatible virtual humans is very important now. There are various approaches to make Humanoid H-Anim bodies. In addition, it treats not only an animatable virtual bodies but also photo

  8. Sandia Energy - Sandians Won Best Poster Award at the ASME 12th Fuel Cell

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power AdministrationRobust, High-Throughput AnalysisSinkhole OfficialsWork onandEnvironmental ScienceScience,

  9. Energy Department-funded researchers have won 46 of the 100 awards given

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration would like submitKansasCommunities Energy EfficiencyModular NuclearINLProjectout this year by

  10. 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)

    2013-12-20

    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.

  11. Limits on Planet Formation Around Young Pulsars and Implications for Supernova Fallback Disks

    E-Print Network [OSTI]

    Kerr, Matthew; Hobbs, George; Shannon, Ryan M

    2015-01-01

    We have searched a sample of 151 young, energetic pulsars for periodic variation in pulse time-of-arrival arising from the influence of planetary companions. We are sensitive to objects with masses two orders of magnitude lower than those detectable with optical transit timing, but we find no compelling evidence for pulsar planets. For the older pulsars most likely to host planets, we can rule out Mercury analogues in one third of our sample and planets with masses $>0.4 M_{\\oplus}$ and periods $P_b2$ Myr) than their protoplanetary counterparts.

  12. Spectroscopy and BVI photometry of the young open cluster NGC 6604

    E-Print Network [OSTI]

    R. Barbon; G. Carraro; U. Munari; T. Zwitter; L. Tomasella

    2000-04-03

    BVI photometry (from South Africa Astron. Obs.), Echelle high resolution spectroscopy and AFOSC integral field spectroscopy (from Asiago, Italy) of the young open cluster NGC 6604 are presented. Age, distance, reddening, membership, radial and rotational velocities are derived and discussed. An age of 5 million years, a distance of 1.7 kpc and a reddening E(B-V)=1.02 are found. The cluster radial velocity is in agreement with the Hron (1987) model for the Galaxy disk rotation. Pre-ZAMS objects are not present down to M_V = +1.5 mag.

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

    E-Print Network [OSTI]

    B. Stelzer

    2000-11-23

    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.

  14. 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

    2005-09-21

    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.

  15. Young's natural representation of the symmetric groups of degree less than six 

    E-Print Network [OSTI]

    Swardstrom, Paul David

    1967-01-01

    matrices corresponding to the linear transformations in the image of D. It follows that T is a matrix representation of G called the matrix representation afforded by D. Definition 1. 2, The degree of a representation is the dimen- sion n...', . . . , n'] if n, &n', for the first distinct pair l. 1. (n&, ni) of elements from the two partitions. ~3*125. 7h f pl g'gt thd't' tp t of 3 are: EP Definition 2. 6. A Young tableau is a frame which has been filled in with the integers from 1 up to n...

  16. 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

    2015-01-01

    TITLE PAGE Title of article: Determinants of sugar-sweetened beverage consumption in young children: a systematic review Authors: Veena Mazarello Paes1,2, Kathryn Hesketh2,3, Claire O’Malley4, Helen Moore4, Carolyn Summerbell4, Simon Griffin1... . Public Health Nutr. 2012;15(08):1338-46. 37. Koh GA, Scott JA, Oddy WH, Graham KI, Binns CW. Exposure to non-core foods and beverages in the first year of life: Results from a cohort study. Nutrition & Dietetics. 2010;67(3):137-42. 38. Lim S, Zoellner...

  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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouthReport for the Weldon Spring,7=cr5rnPandAlba4 Fact SheetYoung -

  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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouthReport for the Weldon Spring,7=cr5rnPandAlba4 Fact SheetYoung

  19. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of NaturalDukeWakefield Municipal Gas &SCE-SessionsSouthReport for the Weldon Spring,7=cr5rnPandAlba4 Fact SheetYoung6/06

  20. Bright Young Minds for a Clean Energy Future | 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity of Natural GasAdjustmentsShirley Ann JacksonDepartment of EnergyResearchers atDayWhenBethanyOnAristides Patrinos,Bright Young

  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

    2007-04-11

    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. The Parkes multibeam pulsar survey III. Young pulsars & the discovery and timing of 200 pulsars

    E-Print Network [OSTI]

    Krämer, M; Manchester, R N; Lyne, A G; Camilo, F; Stairs, I H; D'Amico, N; Kaspi, V M; Hobbs, G; Morris, D J; Crawford, F; Possenti, A; Joshi, B C; McLaughlin, M A; Lorimer, D R; Faulkner, A J

    2003-01-01

    The Parkes multibeam pulsar survey has unlocked vast areas of the Galactic plane which were previously invisible to earlier low-frequency and less-sensitive surveys. The survey has discovered more than 600 new pulsars so far, including many that are young and exotic. In this paper we report the discovery of 200 pulsars for which we present positional and spin-down parameters, dispersion measures, flux densities and pulse profiles. A large number of these new pulsars are young and energetic, and we review possible associations of $\\gamma$-ray sources with the sample of about 1300 pulsars for which timing solutions are known. Based on a statistical analysis, we estimate that about $19\\pm6$ associations are genuine. The survey has also discovered 12 pulsars with spin properties similar to those of the Vela pulsar, nearly doubling the known population of such neutron stars. Studying the properties of all known `Vela-like' pulsars, we find their radio luminosities to be similar to normal pulsars, implying that the...

  3. 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

    1999-09-03

    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.

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

    E-Print Network [OSTI]

    Sean Brittain; Theodore Simon; Joan Najita; Terrence Rettig

    2006-12-08

    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.

  5. A pulsation search among young brown dwarfs and very-low-mass stars

    SciTech Connect (OSTI)

    Cody, Ann Marie; Hillenbrand, Lynne A., E-mail: amc@ipac.caltech.edu [California Institute of Technology, Department of Astrophysics, MC 249-17, Pasadena, CA 91125 (United States)

    2014-12-01

    In 2005, Palla and Baraffe proposed that brown dwarfs (BDs) and very-low-mass stars (VLMSs; < 0.1 solar masses) may be unstable to radial oscillations during the pre-main-sequence deuterium burning phase. With associated periods of one to four hours, this potentially new class of pulsation offers unprecedented opportunities to probe the interiors and evolution of low-mass objects in the 1-15 million year age range. Following up on reports of short-period variability in young clusters, we designed a high-cadence photometric monitoring campaign to search for deuterium-burning pulsation among a sample of 348 BDs and VLMSs in the four young clusters ? Orionis, Chamaeleon I, IC 348, and Upper Scorpius. In the resulting light curves we achieved sensitivity to periodic signals of amplitude several millimagnitudes, on timescales from 15 minutes to two weeks. Despite the exquisite data quality, we failed to detect any periodicities below seven hours. We conclude that D-burning pulsations are not able to grow to observable amplitudes in the early pre-main sequence. In spite of the nondetection, we did uncover a rich set of variability behavior—both periodic and aperiodic—on day to week timescales. We present new compilations of variable sources from our sample, as well as three new candidate cluster members in Chamaeleon I.

  6. SPIN EVOLUTION OF ACCRETING YOUNG STARS. II. EFFECT OF ACCRETION-POWERED STELLAR WINDS

    SciTech Connect (OSTI)

    Matt, Sean P.; Greene, Thomas P.; Pudritz, Ralph E. E-mail: thomas.p.greene@nasa.gov E-mail: pudritz@physics.mcmaster.ca

    2012-01-20

    We present a model for the rotational evolution of a young, solar-mass star interacting magnetically with an accretion disk. As in a previous paper (Paper I), the model includes changes in the star's mass and radius as it descends the Hayashi track, a decreasing accretion rate, and a prescription for the angular momentum transfer between the star and disk. Paper I concluded that, for the relatively strong magnetic coupling expected in real systems, additional processes are necessary to explain the existence of slowly rotating pre-main-sequence stars. In the present paper, we extend the stellar spin model to include the effect of a spin-down torque that arises from an accretion-powered stellar wind (APSW). For a range of magnetic field strengths, accretion rates, initial spin rates, and mass outflow rates, the modeled stars exhibit rotation periods within the range of 1-10 days in the age range of 1-3 Myr. This range coincides with the bulk of the observed rotation periods, with the slow rotators corresponding to stars with the lowest accretion rates, strongest magnetic fields, and/or highest stellar wind mass outflow rates. We also make a direct, quantitative comparison between the APSW scenario and the two types of disk-locking models (namely, the X-wind and Ghosh and Lamb type models) and identify some remaining theoretical issues for understanding young star spins.

  7. Discovery of the young L dwarf wise J174102.78-464225.5

    SciTech Connect (OSTI)

    Schneider, Adam C.; Cushing, Michael C.; Kirkpatrick, J. Davy; Mace, Gregory N.; Gelino, Christopher R.; Fajardo-Acosta, Sergio; Faherty, Jacqueline K.; Sheppard, Scott S.

    2014-02-01

    We report the discovery of the L dwarf WISE J174102.78–464225.5, which was discovered as part of a search for nearby L dwarfs using the Wide-field Infrared Survey Explorer (WISE). The distinct triangular peak of the H-band portion of its near-infrared spectrum and its red near-infrared colors (J – K{sub S} = 2.35 ± 0.08 mag) are indicative of a young age. Via comparison to spectral standards and other red L dwarfs, we estimate a near-infrared spectral type of L7 ± 2 (pec). From a comparison to spectral and low-mass evolutionary models, we determine self-consistent effective temperature, log g, age, and mass values of 1450 ± 100 K, 4.0 ± 0.25 (cm s{sup –2}), 10-100 Myr, and 4-21 M {sub Jup}, respectively. With an estimated distance of 10-30 pc, we explore the possibility that WISE J174102.78–464225.5 belongs to one of the young nearby moving groups via a kinematic analysis and we find potential membership in the ? Pictoris or AB Doradus associations. A trigonometric parallax measurement and a precise radial velocity can help to secure its membership in either of these groups.

  8. 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

    2007-01-01

    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...

  9. Variability in a Young, L/T Transition Planetary-Mass Object

    E-Print Network [OSTI]

    Biller, Beth A; Bonavita, Mariangela; Buenzli, Esther; Baxter, Claire; Crossfield, Ian J M; Allers, Katelyn; Liu, Michael C; Bonnefoy, Mickaël; Deacon, Niall; Brandner, Wolfgang; Schlieder, Joshua E; Dupuy, Trent; Kopytova, Taisiya; Manjavacas, Elena; Allard, France; Homeier, Derek; Henning, Thomas

    2015-01-01

    As part of our ongoing NTT SoFI survey for variability in young free-floating planets and low mass brown dwarfs, we detect significant variability in the young, free-floating planetary mass object PSO J318.5-22, likely due to rotational modulation of inhomogeneous cloud cover. A member of the 23$\\pm$3 Myr $\\beta$ Pic moving group, PSO J318.5-22 has T$_\\mathrm{eff}$ = 1160$^{+30}_{-40}$ K and a mass estimate of 8.3$\\pm$0.5 M$_{Jup}$ for a 23$\\pm$3 Myr age. PSO J318.5-22 is intermediate in mass between 51 Eri b and $\\beta$ Pic b, the two known exoplanet companions in the $\\beta$ Pic moving group. With variability amplitudes from 7-10$\\%$ in J$_{S}$ at two separate epochs over 3-5 hour observations, we constrain the rotational period of this object to $>$5 hours. In K$_{S}$, we marginally detect a variability trend of up to 3$\\%$ over a 3 hour observation. This is the first detection of weather on an extrasolar planetary mass object. Among L dwarfs surveyed at high-photometric precision ($<$3$\\%$) this is the...

  10. YOUNG STARS IN AN OLD BULGE: A NATURAL OUTCOME OF INTERNAL EVOLUTION IN THE MILKY WAY

    SciTech Connect (OSTI)

    Ness, M. [Max-Planck-Institut für Astronomie, Königstuhl 17, D-69117 Heidelberg (Germany); Debattista, Victor P.; Cole, D. R. [Jeremiah Horrocks Institute, University of Central Lancashire, Preston PR1 2HE (United Kingdom); Bensby, T.; Feltzing, S. [Lund Observatory, Department of Astronomy and Theoretical Physics, Box 43, SE-221 00 Lund (Sweden); Roškar, R. [Institute for Theoretical Physics, University of Zürich, Wintherthurerstrasse 190, Zürich CH-8057 (Switzerland); Johnson, J. A. [Department of Astronomy, Ohio State University, 140 W. 18th Avenue, Columbus, OH 43210 (United States); Freeman, K., E-mail: ness@mpia.de [Research School of Astronomy and Astrophysics, Mount Stromlo Observatory, Cotter Road, Weston Creek, ACT 2611 (Australia)

    2014-06-01

    The center of our disk galaxy, the Milky Way, is dominated by a boxy/peanut-shaped bulge. Numerous studies of the bulge based on stellar photometry have concluded that the bulge stars are exclusively old. The perceived lack of young stars in the bulge strongly constrains its likely formation scenarios, providing evidence that the bulge is a unique population that formed early and separately from the disk. However, recent studies of individual bulge stars using the microlensing technique have reported that they span a range of ages, emphasizing that the bulge may not be a monolithic structure. In this Letter we demonstrate that the presence of young stars that are located predominantly nearer to the plane is expected for a bulge that has formed from the disk via dynamical instabilities. Using an N-body+ smoothed particle hydrodynamics simulation of a disk galaxy forming out of gas cooling inside a dark matter halo and forming stars, we find a qualitative agreement between our model and the observations of younger metal-rich stars in the bulge. We are also able to partially resolve the apparent contradiction in the literature between results that argue for a purely old bulge population and those that show a population comprised of a range in ages; the key is where to look.

  11. Origin of the unusually low nitrogen abundances in young populations of the Large Magellanic Cloud

    E-Print Network [OSTI]

    Bekki, Kenji

    2010-01-01

    It is a longstanding problem that HII regions and very young stellar populations in the Large Magellanic Cloud (LMC) have the nitrogen abundances ([N/H]) by a factor of ~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 collision and subsequent accretion of HI 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 ~10^7 yr, then the collision/accretion rate of the HVCs onto the LMC needs to be ~ 0.2 M_sun/yr (corresponding to the total HVC mass of 10^6-10^7 M_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 ~ 10^7 M_sun, the Galaxy needs to have ~2500 massive HVCs within the LMC's orbital radius with respect to the Galactic center. The required rather large number...

  12. Recollimation boundary layers as X-ray sources in young stellar jets

    SciTech Connect (OSTI)

    Günther, Hans Moritz; Li, Zhi-Yun; Schneider, P. C.

    2014-11-01

    Young stars accrete mass from circumstellar disks and, in many cases, the accretion coincides with a phase of massive outflows, which can be highly collimated. Those jets emit predominantly in the optical and IR wavelength range. However, in several cases, X-ray and UV observations reveal a weak but highly energetic component in those jets. X-rays are observed both from stationary regions close to the star and from knots in the jet several hundred AU from the star. In this article, we show semianalytically that a fast stellar wind that is recollimated by the pressure from a slower, more massive disk wind can have the right properties to power stationary X-ray emission. The size of the shocked regions is compatible with observational constraints. Our calculations support a wind-wind interaction scenario for the high-energy emission near the base of young stellar object jets. For the specific case of DG Tau, a stellar wind with a mass-loss rate of 5 × 10{sup –10} M {sub ?} yr{sup –1} and a wind speed of 800 km s{sup –1} reproduces the observed X-ray spectrum. We conclude that a stellar wind recollimation shock is a viable scenario to power stationary X-ray emission close to the jet launching point.

  13. 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

    1999-05-05

    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.

  14. Evidence of the Galactic outer ring R1R2' from young open clusters and OB-associations

    E-Print Network [OSTI]

    Melnik, A M; Glushkova, E V; Dambis, A K

    2016-01-01

    The distribution of young open clusters in the Galactic plane within 3 kpc from the Sun suggests the existence of the outer ring R1R2' in the Galaxy. The optimum value of the solar position angle with respect to the major axis of the bar, theta_b, providing the best agreement between the distribution of open clusters and model particles is theta_b=35 +/- 10 degrees. The kinematical features obtained for young open clusters and OB-associations with negative Galactocentric radial velocity VR indicate the solar location near the descending segment of the outer ring R2.

  15. 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

  16. 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

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

    E-Print Network [OSTI]

    Wood, Robert

    02115. {ylpark, diana.young, leia.stirling}@wyss.harvard.edu B. Chen is with the School of Engineering, Diana Young, Leia Stirling, Robert J. Wood, Eugene Goldfield, and Radhika Nagpal Abstract-- We describe Engineering and National Science Foundation (NSF) grant CNS 0932015. Any opinions, findings, and conclusions

  18. 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

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

    E-Print Network [OSTI]

    Dumin, Yurii V

    2015-01-01

    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.

  20. 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

    2015-01-01

    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...

  1. The evolution of surface magnetic fields in young solar-type stars

    E-Print Network [OSTI]

    Folsom, C P; Bouvier, J; Morin, J; Lèbre, A

    2015-01-01

    Surface rotation rates of young solar-type stars display drastic changes at the end of the pre-main sequence through the early main sequence. This may trigger corresponding changes in the magnetic dynamos operating in these stars, which ought to be observable in their surface magnetic fields. We present here the first results of an observational effort aimed at characterizing the evolution of stellar magnetic fields through this critical phase. We observed stars from open clusters and associations, which range from 20 to 600 Myr, and used Zeeman Doppler Imaging to characterize their complex magnetic fields. We find a clear trend towards weaker magnetic fields for older ages, as well as a tight correlation between magnetic field strength and Rossby number over this age range. Comparing to results for younger T Tauri stars, we observe a very significant change in magnetic strength and geometry, as the radiative core develops during the late pre-main sequence.

  2. Discovery and spectroscopy of the young Jovian planet 51 Eri b with the Gemini Planet Imager

    E-Print Network [OSTI]

    Macintosh, B; Barman, T; De Rosa, R J; Konopacky, Q; Marley, M S; Marois, C; Nielsen, E L; Pueyo, L; Rajan, A; Rameau, J; Saumon, D; Wang, J J; Ammons, M; Arriaga, P; Artigau, E; Beckwith, S; Brewster, J; Bruzzone, S; Bulger, J; Burningham, B; Burrows, A S; Chen, C; Chiang, E; Chilcote, J K; Dawson, R I; Dong, R; Doyon, R; Draper, Z H; Duchêne, G; Esposito, T M; Fabrycky, D; Fitzgerald, M P; Follette, K B; Fortney, J J; Gerard, B; Goodsell, S; Greenbaum, A Z; Hibon, P; Hinkley, S; Hufford, T; Hung, L -W; Ingraham, P; Johnson-Groh, M; Kalas, P; Lafreniere, D; Larkin, J E; Lee, J; Line, M; Long, D; Maire, J; Marchis, F; Matthews, B C; Max, C E; Metchev, S; Millar-Blanchaer, M A; Mittal, T; Morley, C V; Morzinski, K M; Murray-Clay, R; Oppenheimer, R; Palmer, D W; Patel, R; Patience, J; Perrin, M D; Poyneer, L A; Rafikov, R R; Rantakyrö, F T; Rice, E; Rojo, P; Rudy, A R; Ruffio, J -B; Ruiz, M T; Sadakuni, N; Saddlemyer, L; Salama, M; Savransky, D; Schneider, A C; Sivaramakrishnan, A; Song, I; Soummer, R; Thomas, S; Vasisht, G; Wallace, J K; Ward-Duong, K; Wiktorowicz, S J; Wolff, S G; Zuckerman, B

    2015-01-01

    Directly detecting thermal emission from young extrasolar planets allows measurement of their atmospheric composition and luminosity, which is influenced by their formation mechanism. Using the Gemini Planet Imager, we discovered a planet orbiting the \\$sim$20 Myr-old star 51 Eridani at a projected separation of 13 astronomical units. Near-infrared observations show a spectrum with strong methane and water vapor absorption. Modeling of the spectra and photometry yields a luminosity of L/LS=1.6-4.0 x 10-6 and an effective temperature of 600-750 K. For this age and luminosity, "hot-start" formation models indicate a mass twice that of Jupiter. This planet also has a sufficiently low luminosity to be consistent with the "cold- start" core accretion process that may have formed Jupiter.

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

    E-Print Network [OSTI]

    Soeren S. Larsen; Tom Richtler

    1999-02-19

    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

  4. MAGNETIC FIELD STRUCTURE IN THE FLATTENED ENVELOPE AND JET IN THE YOUNG PROTOSTELLAR SYSTEM HH 211

    SciTech Connect (OSTI)

    Lee, Chin-Fei; Rao, Ramprasad; Hirano, Naomi; Ho, Paul T. P.; Hwang, Hsiang-Chih; Ching, Tao-Chung; Lai, Shih-Ping

    2014-12-10

    HH 211 is a young Class 0 protostellar system with a flattened envelope, a possible rotating disk, and a collimated jet. We have mapped it with the Submillimeter Array in the 341.6 GHz continuum and SiO J = 8-7 at ?0.''6 resolution. The continuum traces the thermal dust emission in the flattened envelope and the possible disk. Linear polarization is detected in the continuum in the flattened envelope. The field lines implied from the polarization have different orientations, but they are not incompatible with current gravitational collapse models, which predict a different orientation depending on the region/distance. Also, we might have detected for the first time polarized SiO line emission in the jet due to the Goldreich-Kylafis effect. Observations at higher sensitivity are needed to determine the field morphology in the jet.

  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

    2008-10-27

    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. Jet emission in young radio sources: A Fermi large area telescope gamma-ray view

    SciTech Connect (OSTI)

    Migliori, G.; Siemiginowska, A.; Kelly, B. C.; Stawarz, ?.; Celotti, A.; Begelman, M. C.

    2014-01-10

    We investigate the contribution of the beamed jet component to the high-energy emission in young and compact extragalactic radio sources, focusing for the first time on the ?-ray band. We derive predictions on the ?-ray luminosities associated with the relativistic jet assuming a leptonic radiative model. The high-energy emission is produced via Compton scattering by the relativistic electrons in a spherical region at the considered scales (?10 kpc). Simulations show a wide range of ?-ray luminosities, with intensities up to ?10{sup 46}-10{sup 48} erg s{sup –1} depending on the assumed jet parameters. We find a highly linear relation between the simulated X-ray and ?-ray luminosities that can be used to select candidates for ?-ray detection. We compare the simulated luminosity distributions in the radio, X-ray, and ?-ray regimes with observations for the largest sample of X-ray-detected young radio quasars. Our analysis of ?4-yr Fermi Large Area Telescope (LAT) data does not yield any statistically significant detections. However, the majority of the model-predicted ?-ray fluxes for the sample are near or below the current Fermi-LAT flux threshold and compatible with the derived upper limits. Our study gives constraints on the minimum jet power (L {sub jet,} {sub kin}/L {sub disk} > 0.01) of a potential jet contribution to the X-ray emission in the most compact sources (? 1 kpc) and on the particle-to-magnetic field energy density ratio that are in broad agreement with equipartition assumptions.

  7. Effects of turbulence on cosmic ray propagation in protostars and young star/disk systems

    SciTech Connect (OSTI)

    Fatuzzo, Marco; Adams, Fred C. E-mail: fca@umich.edu

    2014-05-20

    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 distribution of values. (2) The median of the mirror point distribution moves outward for sufficiently large fluctuation amplitudes (roughly when ?B/B {sub 0} > 0.2 at the location of the turbulence-free mirror point); the distribution becomes significantly non-Gaussian in this regime as well. These results may have significant consequences for the ionization fraction of the disk, which in turn dictates the efficiency with which disk material can accrete onto the central object. A similar reduction in cosmic ray flux can occur during the earlier protostellar stages; the decrease in ionization can help alleviate the magnetic braking problem that inhibits disk formation.

  8. 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)

    2010-10-01

    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].

  9. CSI 2264: characterizing accretion-burst dominated light curves for young stars in NGC 2264

    SciTech Connect (OSTI)

    Stauffer, John; Cody, Ann Marie; Rebull, Luisa; Carey, Sean [Spitzer Science Center, California Institute of Technology, Pasadena, CA 91125 (United States); Baglin, Annie [LESIA, Observatoire de Paris-Meudon, 5 place Jules Janssen, F-92195, Meudon (France); Alencar, Silvia [Departamento de Física-ICEx-UFMG, Av. Antônio Carlos, 6627, 30270-901, Belo Horizonte, MG (Brazil); Hillenbrand, Lynne A.; Carpenter, John; Findeisen, Krzysztof [Astronomy Department, California Institute of Technology, Pasadena, CA 91125 (United States); Venuti, Laura; Bouvier, Jerome [UJF-Grenoble 1/CNRS-INSU, Institut de Planétologie et d'Astrophysique de Grenoble (IPAG) UMR 5274, Grenoble, F-38041 (France); Turner, Neal J. [Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109 (United States); Plavchan, Peter [Infrared Processing and Analysis Center, California Institute of Technology, Pasadena, CA 91125 (United States); Terebey, Susan [Department of Physics and Astronomy, 5151 State University Drive, California State University at Los Angeles, Los Angeles, CA 90032 (United States); Morales-Calderón, María [Centro de Astrobiología, Dpto. de Astrofísica, INTA-CSIC, P.O. Box 78, E-28691, ESAC Campus, Villanueva de la Cañada, Madrid (Spain); Micela, Giusi; Flaccomio, Ettore [INAF - Osservatorio Astronomico di Palermo, Piazza del Parlamento 1, I-90134, Palermo (Italy); Song, Inseok [Department of Physics and Astronomy, The University of Georgia, Athens, GA 30602-2451 (United States); Gutermuth, Rob [Five College Astronomy Department, Smith College, Northampton, MA 01063 (United States); Hartmann, Lee, E-mail: stauffer@ipac.caltech.edu [Department of Astronomy, University of Michigan, 500 Church Street, Ann Arbor, MI 48105 (United States); and others

    2014-04-01

    Based on more than four weeks of continuous high-cadence photometric monitoring of several hundred members of the young cluster NGC 2264 with two space telescopes, NASA's Spitzer and the CNES CoRoT (Convection, Rotation, and planetary Transits), we provide high-quality, multi-wavelength light curves for young stellar objects whose optical variability is dominated by short-duration flux bursts, which we infer are due to enhanced mass accretion rates. These light curves show many brief—several hours to one day—brightenings at optical and near-infrared wavelengths with amplitudes generally in the range of 5%-50% of the quiescent value. Typically, a dozen or more of these bursts occur in a 30 day period. We demonstrate that stars exhibiting this type of variability have large ultraviolet (UV) excesses and dominate the portion of the u – g versus g – r color-color diagram with the largest UV excesses. These stars also have large H? equivalent widths, and either centrally peaked, lumpy H? emission profiles or profiles with blueshifted absorption dips associated with disk or stellar winds. Light curves of this type have been predicted for stars whose accretion is dominated by Rayleigh-Taylor instabilities at the boundary between their magnetosphere and inner circumstellar disk, or where magneto-rotational instabilities modulate the accretion rate from the inner disk. Among the stars with the largest UV excesses or largest H? equivalent widths, light curves with this type of variability greatly outnumber light curves with relatively smooth sinusoidal variations associated with long-lived hot spots. We provide quantitative statistics for the average duration and strength of the accretion bursts and for the fraction of the accretion luminosity associated with these bursts.

  10. 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

  11. Deep Packet Filter with Dedicated Logic and Read Only Memories Young H. Cho and William H. Mangione-Smith

    E-Print Network [OSTI]

    Cho, Young Hyun

    Deep Packet Filter with Dedicated Logic and Read Only Memories Young H. Cho and William H. Mangione is a computationally expensive task. The speed of the search pattern module determines the overall performance of deep of deep packet filters to detect application level attacks in the packet payloads. Deep packet filters

  12. Simulated Radio Images and Light Curves of Young Supernovae Amy J. Mioduszewski 1 , Vikram V. Dwarkadas 2 & Lewis Ball 3

    E-Print Network [OSTI]

    Mioduszewski, Amy

    { supernovae: individual: SN1980K, SN1993J { hydrodynamics { shock waves { radio continuum: stars 1Simulated Radio Images and Light Curves of Young Supernovae Amy J. Mioduszewski 1 , Vikram V for publication in ApJ ABSTRACT We present calculations of the radio emission from supernovae based on high

  13. 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

  14. The origin of young mare basalts inferred from lunar meteorites Northwest Africa 4734, 032, and LaPaz Icefield 02205

    E-Print Network [OSTI]

    The origin of young mare basalts inferred from lunar meteorites Northwest Africa 4734, 032, and La accepted 21 October 2013) Abstract­Northwest Africa (NWA) 4734 is an unbrecciated basaltic lunar meteorite basalts. NWA 4734 is a low-Ti mare basalt with a low Mg* (36.5) and elevated abundances of incompatible

  15. Construction required the expertise of architects and civil engineers CERN attracts both the young and old, including Claire Timlin from

    E-Print Network [OSTI]

    Construction required the expertise of architects and civil engineers CERN attracts both the young STFC funds the UK membership to CERN which enables UK scientists and engineers access to the vast has thanks to the LHC Engineering Success The LHC sits in a 27 km long tunnel, the construction

  16. Personalized prediction of brain fiber integrity in 396 young adults based on genotyping of multiple common genetic variants

    E-Print Network [OSTI]

    Thompson, Paul

    Personalized prediction of brain fiber integrity in 396 young adults based on genotyping-derived measures may be useful for early, personalized risk assessment of impaired brain integrity. #12;#12; matter fiber integrity in the living brain, as measured by diffusion tensor imaging (DTI). We considered

  17. TENTATIVE EVIDENCE FOR RELATIVISTIC ELECTRONS GENERATED BY THE JET OF THE YOUNG SUN-LIKE STAR DG Tau

    SciTech Connect (OSTI)

    Ainsworth, Rachael E.; Ray, Tom P.; Taylor, Andrew M.; Scaife, Anna M. M.; Green, David A.; Buckle, Jane V.

    2014-09-01

    Synchrotron emission has recently been detected in the jet of a massive protostar, providing further evidence that certain jet formation characteristics for young stars are similar to those found for highly relativistic jets from active galactic nuclei. We present data at 325 and 610 MHz taken with the Giant Metrewave Radio Telescope of the young, low-mass star DG Tau, an analog of the Sun soon after its birth. This is the first investigation of a low-mass young stellar object at such low frequencies. We detect emission with a synchrotron spectral index in the proximity of the DG Tau jet and interpret this emission as a prominent bow shock associated with this outflow. This result provides tentative evidence for the acceleration of particles to relativistic energies due to the shock impact of this otherwise very low-power jet against the ambient medium. We calculate the equipartition magnetic field strength B {sub min} ? 0.11 mG and particle energy E {sub min} ? 4 × 10{sup 40} erg, which are the minimum requirements to account for the synchrotron emission of the DG Tau bow shock. These results suggest the possibility of low energy cosmic rays being generated by young Sun-like stars.

  18. arXiv:astro-ph/010224014Feb2001 A dusty torus around the luminous young star LkH 101

    E-Print Network [OSTI]

    Tuthill, Peter

    , thermonuclear fusion begins. The remaining disk, which can still contain up to 0.3 times the mass of the star[3arXiv:astro-ph/010224014Feb2001 A dusty torus around the luminous young star LkH 101 Peter G. A star forms when a cloud of dust and gas collapses. It is generally believed that this collapse first

  19. XPS, AES and SEM analysis of recent dental implants Byung-Soo Kang a,*, Young-Taeg Sul a

    E-Print Network [OSTI]

    Oh, Se-Jung

    XPS, AES and SEM analysis of recent dental implants Byung-Soo Kang a,*, Young-Taeg Sul a , Se-Jung Oh b , Hyun-Ju Lee c , Tomas Albrektsson a a Department of Biomaterials/Handicap Research, Institute a development strategy for dental implants. The present study investigated the chemistry and morphology

  20. 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

  1. BIOMEDICAL ENGINEERING (BME) IS A YOUNG DEPARTMENT UNDERGOING RAPID GROWTH. IT LEVERAGES THE STRONG COLLABORATIVE, MULTIDISCIPLINARY CULTURE OF CARNEGIE MELLON

    E-Print Network [OSTI]

    Spirtes, Peter

    BIOMEDICAL ENGINEERING (BME) IS A YOUNG DEPARTMENT UNDERGOING RAPID GROWTH. IT LEVERAGES THE STRONG O M E D I C A L E N G I N E E R I N G Biomedical Engineering Centers Center for Bioimage Informatics Pittsburgh NMR Center for Biomedical Research Fast Facts · BME is offered as an additional major B.S. degree

  2. Tradeo s in Making the Behavior-Based Robotic Systems Goal-Directed

    E-Print Network [OSTI]

    Mali, Amol D.

    Tradeo#11;s in Making the Behavior-Based Robotic Systems Goal-Directed Amol Dattatraya Mali Dept. of computer science and engineering Arizona state university, Tempe, AZ 85287-5406, USA amol.mali

  3. A self-consistent, absolute isochronal age scale for young moving groups in the solar neighbourhood

    E-Print Network [OSTI]

    Bell, Cameron P M; Naylor, Tim

    2015-01-01

    We present a self-consistent, absolute isochronal age scale for young (solar neighbourhood based on homogeneous fitting of semi-empirical pre-main-sequence model isochrones using the tau^2 maximum-likelihood fitting statistic of Naylor & Jeffries in the M_V, V-J colour-magnitude diagram. The final adopted ages for the groups are: 149+51-19 Myr for the AB Dor moving group, 24+/-3 Myr for the {\\beta} Pic moving group (BPMG), 45+11-7 Myr for the Carina association, 42+6-4 Myr for the Columba association, 11+/-3 Myr for the {\\eta} Cha cluster, 45+/-4 Myr for the Tucana-Horologium moving group (Tuc-Hor), 10+/-3 Myr for the TW Hya association, and 22+4-3 Myr for the 32 Ori group. At this stage we are uncomfortable assigning a final, unambiguous age to the Argus association as our membership list for the association appears to suffer from a high level of contamination, and therefore it remains unclear whether these stars represent a single population of co...

  4. A NEAR-INFRARED SPECTROSCOPIC STUDY OF YOUNG FIELD ULTRACOOL DWARFS

    SciTech Connect (OSTI)

    Allers, K. N.; Liu, Michael C.

    2013-08-01

    We present a near-infrared (0.9-2.4 {mu}m) spectroscopic study of 73 field ultracool dwarfs having spectroscopic and/or kinematic evidence of youth ( Almost-Equal-To 10-300 Myr). Our sample is composed of 48 low-resolution (R Almost-Equal-To 100) spectra and 41 moderate-resolution spectra (R {approx}> 750-2000). First, we establish a method for spectral typing M5-L7 dwarfs at near-IR wavelengths that is independent of gravity. We find that both visual and index-based classification in the near-IR provides consistent spectral types with optical spectral types, though with a small systematic offset in the case of visual classification at J and K band. Second, we examine features in the spectra of {approx}10 Myr ultracool dwarfs to define a set of gravity-sensitive indices based on FeH, VO, K I, Na I, and H-band continuum shape. We then create an index-based method for classifying the gravities of M6-L5 dwarfs that provides consistent results with gravity classifications from optical spectroscopy. Our index-based classification can distinguish between young and dusty objects. Guided by the resulting classifications, we propose a set of low-gravity spectral standards for the near-IR. Finally, we estimate the ages corresponding to our gravity classifications.

  5. 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)

    2013-12-01

    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.

  6. Discovery of Young Methane Dwarfs in the Rho Ophiuchi L 1688 Dark Cloud

    E-Print Network [OSTI]

    Chiang, Poshih

    2015-01-01

    We report the discovery of two methane dwarfs in the dark cloud L 1688 of the Rho Oph star-forming region. The two objects were among the T dwarf candidates with possible methane absorption and cool atmospheres, as diagnosed by infrared colors using deep WIRCam/CFHT HK plus CH4ON images, and IRAC/Spitzer c2d data. Follow-up spectroscopic observations with the FLAMINGOS-2/Gemini South confirmed the methane absorption at 1.6 micron. Compared with spectral templates of known T dwarfs in the field, i.e., of the old populations, Oph J162738-245240 (Oph-T3) is a T0/T1 type, whereas Oph J162645-241949 (Oph-T17) is consistent with a T3/T4 type in the H band but an L8/T1 in the K band. Compared with the BT-Settl model, both Oph-T3 and Oph-T17 are consistent with being cool, ~ 1000 K and ~ 900 K, respectively, and of low surface gravity, log(g) = 3.5. With an age no more than a couple Myr, these two methane dwarfs thereby represent the youngest T dwarfs ever confirmed. A young late L dwarf, OphJ162651-242110, was found...

  7. Direct Imaging and Spectroscopy of a Young Extrasolar Kuiper Belt in the Nearest OB Association

    E-Print Network [OSTI]

    Currie, Thayne; Kuchner, Marc J; Madhusudhan, Nikku; Kenyon, Scott J; Thalmann, Christian; Carson, Joseph; Debes, John H

    2015-01-01

    We describe the discovery of a bright, young Kuiper belt-like debris disk around HD 115600, a $\\sim$ 1.4--1.5 M$_\\mathrm{\\odot}$, $\\sim$ 15 Myr old member of the Sco-Cen OB Association. Our H-band coronagraphy/integral field spectroscopy from the \\textit{Gemini Planet Imager} shows the ring has a (luminosity scaled) semi major axis of ($\\sim$ 22 AU) $\\sim$ 48 AU, similar to the current Kuiper belt. The disk appears to have neutral scattering dust, is eccentric (e $\\sim$ 0.1--0.2), and could be sculpted by analogues to the outer solar system planets. Spectroscopy of the disk ansae reveal a slightly blue to gray disk color, consistent with major Kuiper belt chemical constituents, where water-ice is a very plausible dominant constituent. Besides being the first object discovered with the next generation of extreme adaptive optics systems (i.e. SCExAO, GPI, SPHERE), HD 115600's debris ring and planetary system provides a key reference point for the early evolution of the solar system, the structure and compositio...

  8. SUBSTELLAR OBJECTS IN NEARBY YOUNG CLUSTERS (SONYC). II. THE BROWN DWARF POPULATION OF {rho} OPHIUCHI

    SciTech Connect (OSTI)

    Geers, Vincent; Jayawardhana, Ray; Lee, Eve; Lafreniere, David [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4 (Canada); Scholz, Alexander [School of Cosmic Physics, Dublin Institute for Advanced Studies, 31 Fitzwilliam Place, Dublin 2 (Ireland); Tamura, Motohide, E-mail: vcgeers@astro.utoronto.ca [National Astronomical Observatory, Osawa 2-21-2, Mitaka, Tokyo 181 (Japan)

    2011-01-01

    SONYC-Substellar Objects in Nearby Young Clusters-is a survey program to investigate the frequency and properties of brown dwarfs (BDs) down to masses below the deuterium-burning limit in nearby star-forming regions. In this second paper, we present results on the {approx}1 Myr old cluster {rho} Ophiuchi, combining our own deep optical- and near-infrared imaging using Subaru with photometry from the Two Micron All Sky Survey and the Spitzer Space Telescope. Of the candidates selected from iJK{sub s} photometry, we have confirmed three-including a new BD with a mass close to the deuterium limit-as likely cluster members through low-resolution infrared spectroscopy. We also identify 27 substellar candidates with mid-infrared excess consistent with disk emission, of which 16 are new and 11 are previously spectroscopically confirmed BDs. The high and variable extinction makes it difficult to obtain the complete substellar population in this region. However, current data suggest that its ratio of low-mass stars to BDs is similar to those reported for several other clusters, though higher than what was found for NGC 1333 in Scholz et al.

  9. The continuous period search method and its application to the young solar analogue HD 116956

    E-Print Network [OSTI]

    Lehtinen, J; Hackman, T; Henry, P Kajatkari G W

    2010-01-01

    Aims: We formulate an improved time series analysis method for the analysis of photometry of active stars. This new Continuous Period Search (CPS) method is applied to 12 years of V band photometry of the young solar analogue HD 116956 (NQ UMa). Methods: The new method is developed from the previous Three Stage Period Analysis (TSPA) method. Our improvements are the use of a sliding window in choosing the modelled datasets, a criterion applied to select the best model for each dataset and the computation of the time scale of change of the light curve. We test the performance of CPS with simulated and real data. Results: The CPS has a much improved time resolution which allows us to better investigate fast evolution of stellar light curves. We can also separate between the cases when the data is best described by periodic (i.e. rotational modulation of brightness) and aperiodic (e.g. constant brightness) models. We find, however, that the performance of the CPS has certain limitations. It does not determine th...

  10. Herschel observations of the hydroxyl radical (OH) in young stellar objects

    E-Print Network [OSTI]

    Wampfler, S F; Bruderer, S; Benz, A O; van Dishoeck, E F; Kristensen, L E; Visser, R; Doty, S D; Melchior, M; van Kempen, T A; Yildiz, U A; Dedes, C; Goicoechea, J R; Baudry, A; Melnick, G; Bachiller, R; Benedettini, M; Bergin, E; Bjerkeli, P; Blake, G A; Bontemps, S; Braine, J; Caselli, P; Cernicharo, J; Codella, C; Daniel, F; di Giorgio, A M; Dominik, C; Encrenaz, P; Fich, M; Fuente, A; Giannini, T; de Graauw, Th; Helmich, F; Herpin, F; Jacq, T; Johnstone, D; ørgensen, J K J; Larsson, B; Lis, D; Liseau, R; Marseille, M; McCoey, C; Neufeld, D; Nisini, B; Olberg, M; Parise, B; Pearson, J C; Plume, R; Risacher, C; Santiago-Garcia, J; Saraceno, P; Shipman, R; Tafalla, M; van der Tak, F F S; Wyrowski, F; Roelfsema, P; Jellema, W; Dieleman, P; Caux, E; Stutzki, J

    2010-01-01

    Water in Star-forming regions with Herschel (WISH) is a Herschel Key Program investigating the water chemistry in young stellar objects (YSOs) during protostellar evolution. Hydroxyl (OH) is one of the reactants in the chemical network most closely linked to the formation and destruction of H2O. High-temperature chemistry connects OH and H2O through the OH + H2 H2O + H reactions. Formation of H2O from OH is efficient in the high-temperature regime found in shocks and the innermost part of protostellar envelopes. Moreover, in the presence of UV photons, OH can be produced from the photo-dissociation of H2O. High-resolution spectroscopy of the OH 163.12 micron triplet towards HH 46 and NGC 1333 IRAS 2A was carried out with the Heterodyne Instrument for the Far Infrared (HIFI) on board Herschel. The low- and intermediate-mass YSOs HH 46, TMR 1, IRAS 15398-3359, DK Cha, NGC 7129 FIRS 2, and NGC 1333 IRAS 2A were observed with the Photodetector Array Camera and Spectrometer (PACS) in four transitions of OH and tw...

  11. A dusty torus around the luminous young star LkHa 101

    E-Print Network [OSTI]

    Peter G. Tuthill; John D. Monnier; William C. Danchi

    2001-02-14

    A star forms when a cloud of dust and gas collapses. It is generally believed that this collapse first produces a flattened rotating disk, through which matter is fed onto the embryonic star at the center of the disk. When the temperature and density at the center of the star pass a critical threshold, thermonuclear fusion begins. The remaining disk, which can still contain up to 0.3 times the mass of the star, is then sculpted and eventually dissipated by the radiation and wind from the newborn star. Unfortunately this picture of the structure and evolution of the disk remains speculative because of the lack of morphological data of sufficient resolution and uncertainties regarding the underlying physical processes. Here we present resolved images of a young star, LkHa 101 in which the structure of the inner accretion disk is resolved. We find that the disk is almost face-on, with a central gap (or cavity) and a hot inner edge. The cavity is bigger than previous theoretical predictions, and we infer that the position of the inner edge is probably determined by sublimation of dust grains by direct stellar radiation, rather than by disk reprocessing or the viscous heating processes as usually assumed.

  12. UV variability and accretion dynamics in the young open cluster NGC 2264

    E-Print Network [OSTI]

    Venuti, Laura; Irwin, Jonathan; Stauffer, John; Hillenbrand, Lynne; Rebull, Luisa; Cody, Ann Marie; Alencar, Silvia; Micela, Giuseppina; Flaccomio, Ettore; Peres, Giovanni

    2015-01-01

    We explore UV and optical variability signatures for several hundred members of NGC 2264 (3 Myr). We performed simultaneous u- and r-band monitoring over two full weeks with CFHT/MegaCam. About 750 young stars are probed; 40% of them are accreting. Statistically distinct variability properties are observed for accreting and non-accreting cluster members. The accretors exhibit a significantly higher level of variability than the non-accretors, especially in the UV. The amount of u-band variability correlates statistically with UV excess in disk-bearing objects, which suggests that accretion and star-disk interaction are the main sources of variability. Cool magnetic spots, several hundred degrees colder than the photosphere and covering from 5 to 30% of the stellar surface, appear to be the leading factor of variability for the non-accreting stars. In contrast, accretion spots, a few thousand degrees hotter than the photosphere and covering a few percent of the stellar surface, best reproduce the variability o...

  13. 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)

    2014-01-10

    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.

  14. Formation of young boxy/peanut bulges in ringed barred galaxies

    E-Print Network [OSTI]

    Wozniak, Herve; 10.1051/0004-6361:200810903

    2009-01-01

    We investigate whether the formation mechanism of boxy and peanut-shaped (B/PS) bulges could depend on the gas content of the galaxy. We have performed N-body simulations with and without a gaseous component. In the second case star formation/feedback recipes have also been implemented to create new stellar populations. As in many previous studies, in our N-body collisionless simulation, the B/PS is due to the classical break in the z mirror symmetry lasting roughly 200 Myr. When a gaseous component and star formation recipes are added to the simulation, the bulge-growing mechanism is quite different. The young stellar population that is born in the thin gaseous disc rapidly populates vertical resonant orbits triggered by the combined effects of the linear horizontal and vertical ILRs. This leads to a B/PS bulge mainly made of stellar material younger than the surrounding population. The non-linear analysis of the orbital structure shows that the main orbit family responsible for the B/PS is not the same in t...

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

    E-Print Network [OSTI]

    Tsujimoto, M; Grosso, N; Micela, G; Tsuboi, Y; Favata, F; Shang, H; Kästner, J H

    2004-01-01

    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 iro...

  16. 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

    2015-01-01

    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 $...

  17. NuSTAR observations of the young, energetic radio pulsar PSR B1509-58

    E-Print Network [OSTI]

    Chen, Ge; Kaspi, Victoria M; Harrison, Fiona; Madsen, Kristen; Stern, Daniel

    2015-01-01

    We report on Nuclear Spectroscopic Telescope Array (NuSTAR) hard X-ray observations of the young rotation-powered radio pulsar PSR B1509$-$58 in the supernova remnant MSH 15$-$52. We confirm the previously reported curvature in the hard X-ray spectrum, showing that a log parabolic model provides a statistically superior fit to the spectrum compared with the standard power law. The log parabolic model describes the NuSTAR data, as well as previously published gamma-ray data obtained with COMPTEL and AGILE, all together spanning 3 keV through 500 MeV. Our spectral modelling allows us to constrain the peak of the broadband high energy spectrum to be at 2.6$\\pm$0.8 MeV, an improvement of nearly an order of magnitude over previous measurements. In addition, we calculate NuSTAR spectra in 26 pulse phase bins and confirm previously reported variations of photon indices with phase. Finally, we measure the pulsed fraction of PSR B1509$-$58 in the hard X-ray energy band for the first time. Using the energy resolved pul...

  18. EXTREME CONDITIONS IN A CLOSE ANALOG TO THE YOUNG SOLAR SYSTEM: HERSCHEL OBSERVATIONS OF ? ERIDANI

    SciTech Connect (OSTI)

    Greaves, J. S. [SUPA, Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, Fife KY16 9SS (United Kingdom); Sibthorpe, B.; Holland, W. S. [UK Astronomy Technology Centre, Royal Observatory Edinburgh, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Acke, B.; Vandenbussche, B.; Blommaert, J. A. D. L. [Instituut voor Sterrenkunde, K. U. Leuven, Celestijnenlaan 200D, B-3001 Leuven (Belgium); Pantin, E. E. [Laboratoire AIM, CEA/DSM-CNRS-Universit Paris Diderot, IRFU/Service dAstrophysique, Bat.709, CEA-Saclay, F-91191 Gif- sur-Yvette Cedex (France); Olofsson, G.; Brandeker, A.; De Vries, B. L. [Stockholm University Astrobiology Centre, SE-106 91 Stockholm (Sweden); Dominik, C. [Astronomical Institute Anton Pannekoek, University of Amsterdam, P.O. Box 94249, 1090-GE Amsterdam (Netherlands); Barlow, M. J. [Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT (United Kingdom); Bendo, G. J. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester M13 9PL (United Kingdom); Dent, W. R. F. [ALMA SCO, Alonso de Cordova 3107, Vitacura, Casilla 763 0355, Santiago (Chile); Di Francesco, J. [Herzberg Astronomy and Astrophysics Programs, National Research Council of Canada, 5071 West Saanich Road, Victoria, BC, V9E 2E7 (Canada); Fridlund, M. [ESA, SRE-SA, Keplerlaan 1, NL-2201 AZ Noordwijk (Netherlands); Gear, W. K. [School of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA (United Kingdom); Harvey, P. M. [Astronomy Department, University of Texas, Austin, TX 78712 (United States); Hogerheijde, M. R. [Leiden Observatory, Leiden University, P.O. Box 9513, 2300-RA Leiden (Netherlands); Ivison, R. J., E-mail: jsg5@st-andrews.ac.uk [Institute for Astronomy, University of Edinburgh, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); and others

    2014-08-10

    Far-infrared Herschel images of the ? Eridani system, seen at a fifth of the Sun's present age, resolve two belts of debris emission. Fits to the 160 ?m PACS image yield radial spans for these belts of 12-16 and 54-68 AU. The south end of the outer belt is ?10% brighter than the north end in the PACS+SPIRE images at 160, 250, and 350 ?m, indicating a pericenter glow attributable to a planet ''c''. From this asymmetry and an upper bound on the offset of the belt center, this second planet should be mildly eccentric (e{sub c} ? 0.03-0.3). Compared to the asteroid and Kuiper Belts of the young Sun, the ? Eri belts are intermediate in brightness and more similar to each other, with up to 20 km sized collisional fragments in the inner belt totaling ?5% of an Earth mass. This reservoir may feed the hot dust close to the star and could send many impactors through the Habitable Zone, especially if it is being perturbed by the suspected planet ? Eri b, at semi-major axis ?3 AU.

  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

    2004-12-25

    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. Inner disc rearrangement revealed by dramatic brightness variations in the young star PV Cep

    E-Print Network [OSTI]

    Kun, M; Moór, A; Kóspál, Á; Ábrahám, P; Apai, D; Kiss, Z T; Klagyivik, P; Magakian, T Yu; Mez\\Ho, Gy; Movsessian, T A; Pál, A; Rácz, M; Rogers, J

    2011-01-01

    Young Sun-like stars at the beginning of the pre-main sequence (PMS) evolution are surrounded by accretion discs and remnant protostellar envelopes. Photometric and spectroscopic variations of these stars are driven by interactions of the star with the disc. Time scales and wavelength dependence of the variability carry information on the physical mechanisms behind these interactions. We conducted multi-epoch, multi-wavelength study of PV Cep, a strongly variable, accreting PMS star. By combining our own observations from 2004-2010 with archival and literature data, we show that PV Cep started a spectacular fading in 2005, reaching an I_C-band amplitude of 4 mag. Analysis of variation of the optical and infrared fluxes, colour indices, and emission line fluxes suggests that the photometric decline in 2005-2009 resulted from an interplay between variable accretion and circumstellar extinction: since the central luminosity of the system is dominated by accretion, a modest drop in the accretion rate could induce...

  1. Radio Emission from a Young Supernova Remnant Interacting with an Interstellar Cloud Magnetohydrodynamic Simulation with Relativistic Electrons

    E-Print Network [OSTI]

    Jun, B I; Jun, Byung-Il

    1999-01-01

    We present two-dimensional MHD simulations of the evolution of a young Type Ia supernova remnant during its interaction with an interstellar cloud of comparable size at impact. We include for the first time in such simulations explicit relativistic electron transport, including spectral information using a simple but effective scheme that follows their acceleration at shocks and subsequent transport. From this information we also model radio synchrotron emission, including spectra. The principal conclusions from these experiments are: 1) Independent of the cloud interaction, the SNR reverse shock can be an efficient site for particle acceleration in a young SNR. 2) At these early times the synchrotron spectral index due to electrons accelerated at the primary shocks should be close to 0.5 unless those shocks are modified by cosmic-ray pressures. However, interaction with the cloud generates regions of distinctly steeper spectra, which may complicate interpretation in terms of global dynamical models for SNR e...

  2. Superconducting properties of BeB2.75 D. P. Young, R. G. Goodrich, and P. W. Adams

    E-Print Network [OSTI]

    Adams, Philip W.

    Superconducting properties of BeB2.75 D. P. Young, R. G. Goodrich, and P. W. Adams Department commonly known as BeB2. In contrast to the much simpler AlB2-type structure of the 39-K superconductor MgB2 , BeB2 forms a complex structure-type that is nearly unique in nature. The structure has 110.5 atoms

  3. H_alpha emission fluxes and lithium abundances of low mass stars in the young open cluster IC 4665

    E-Print Network [OSTI]

    E. L. Martin; D. Montes

    1996-05-08

    As part of a long term effort to understand pre-main sequence Li burning, we have obtained high resolution spectroscopic observations of 14 late type stars (G0--M1) in the young open cluster IC~4665. Most of the stars have \\ha filled-in and \\li absorption, as expected for their young age. From the equivalent widths of \\ha emission excess (obtained using the spectral subtraction technique) and the \\lii feature, we have derived \\ha emission fluxes and photospheric Li abundances. The mean Li abundance of IC~4665 solar-type stars is log N(Li)=3.1; the same as in other young clusters ($\\alpha$~Per, Pleiades) and T Tauri stars. Our results support the conclusions from previous works that PMS Li depletion is very small for masses $\\sim$ 1 \\msun . Among the IC 4665 late-G and early K-type stars, there is a spread in Li abundances of about one order of magnitude. The Li-poor IC~4665 members have low \\ha excess and vsin{\\it i}$\\le$10. Hence, the Li-activity-rotation connection which has been clearly established in the Pleiades also seems to hold in IC 4665. One M-type IC~4665 star that we have observed does not show Li, implying a very efficient Li depletion as observed in $\\alpha$~Per stars of the same spectral type. The level of chromospheric activity and Li depletion among the low mass stars of IC 4665 is similar to that in the Pleiades. In fact, we note that the Li abundance distributions in several young clusters ($\\alpha$~Per, Pleiades, IC~2391, IC~4665) and in post T Tauri stars are strikingly similar. This result suggests that \\ha emission and Li abundance not well correlated with age for low mass stars between 20 and 100 Myr old. We argue that a finer age indicator, the ``LL-clock", would be the luminosity at

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

    E-Print Network [OSTI]

    Cook, Lloyd Steven

    1989-01-01

    for internal friction 6. 3 The corstant C TABLE OF CONTENTS (Continued) CONCLUSIONS Page 17 REFERENCES VITA 00 LIST OF TABLES Table l. Alloy Compositions . 2. Measured Densities of Specimens 3. Polynomials for CTE Data 4. Dynamic Young's Modulus... in failure, the mechanical properties of coatings have not been a subject of much concern. Recently, however, plasma sprayed NiCrA1Y coatings have been used as "bond coats", intermediate between an insulating top coat and the protected structural member...

  5. 2338 IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 55, NO. 9, SEPTEMBER 2008 Dynamic Response of Normal and Corbino

    E-Print Network [OSTI]

    Kanicki, Jerzy

    -matrix organic light- emitting display (AM-OLED), bottom gate, corbino, dynamic measurement, dynamic response. INTRODUCTION TO DATE, the active-matrix organic light-emitting dis- play (AM-OLED) has attracted many interests of Normal and Corbino a-Si:H TFTs for AM-OLEDs Hojin Lee, Chun-Sung Chiang, and Jerzy Kanicki, Senior Member

  6. IRS 16SW - A New Comoving Group of Young Stars in the Central Parsec of the Milky Way

    E-Print Network [OSTI]

    J. R. Lu; A. M. Ghez; S. D. Hornstein; M. Morris; E. E. Becklin

    2005-04-12

    One of the most perplexing problems associated with the supermassive black hole at the center of our Galaxy is the origin of the young stars in its close vicinity. Using proper motion measurements and stellar number density counts based on 9 years of diffraction-limited K(2.2 micron)-band speckle imaging at the W. M. Keck 10-meter telescopes, we have identified a new comoving group of stars, which we call the IRS 16SW comoving group, located 1.9" (0.08 pc, in projection) from the central black hole. Four of the five members of this comoving group have been spectroscopically identified as massive young stars, specifically He I emission-line stars and OBN stars. This is the second young comoving group within the central parsec of the Milky Way to be recognized and is the closest, by a factor of 2, in projection to the central black hole. These comoving groups may be the surviving cores of massive infalling star clusters that are undergoing disruption in the strong tidal field of the central supermassive black hole.

  7. 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

    2015-01-01

    [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 ...

  8. Securing Wireless Data Networks against Eavesdropping Using Smart Antennas Sriram Lakshmanan, Cheng-Lin Tsao, Raghupathy Sivakumar, Tae-young chang

    E-Print Network [OSTI]

    Sivakumar, Raghupathy

    Securing Wireless Data Networks against Eavesdropping Using Smart Antennas Sriram Lakshmanan, Cheng-Lin Tsao, Raghupathy Sivakumar, Tae-young chang Georgia Institute of Technology Atlanta,GA,USA {sriram

  9. 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

  10. 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

  11. 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

    3 rd International Workshop of Young Doctors in Geomechanics - W(H)YDOC 08 Pereira, De Gennaro fracturing. This phenomenon is important in petroleum engineering where the reservoir rock and the well

  12. 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

    2013-01-01

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

  13. 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

    2014-12-15

    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 ...

  14. 35.4 / C. Wu 35.4: A 2.1-inch AMOLED Display Based on Metal-Induced Laterally

    E-Print Network [OSTI]

    the development of active-matrix (AM) organic light-emitting diode (OLED) displays [1]. In the realization not only low field-effect mobility but also stress-induced instability. OLED is a current-driven light University, Beijing, PR China Abstract A 2.1-inch color active-matrix organic light-emitting diode display

  15. J. Microbiol. Biotechnol. (2007), 17(11), 18751879 Arthrobacter subterraneus sp. nov., Isolated from Deep Subsurface Water of

    E-Print Network [OSTI]

    Bae, Jin-Woo

    2007-01-01

    from Deep Subsurface Water of the South Coast of Korea CHANG,HO-WON1,2 ,JIN-WOOBAE1 ,YOUNG-DONAM1 ,HYUK-yellow pigmented bacterial strain CH7T was isolated using a dilution-plating technique from deep subsurface water, Chungnam National University, Daejeon 306-764, Korea3 Department of Microbiology and Microbial Engineering

  16. Thermally Stable Gel Polymer Electrolytes Min-Kyu Song,a

    E-Print Network [OSTI]

    Popov, Branko N.

    Thermally Stable Gel Polymer Electrolytes Min-Kyu Song,a Young-Taek Kim,a Yong Tae Kim,b Byung Won/polyvinylidene fluoride PEGDA/PVdF blend gel polymer electrolytes, low molecular weight (M 742) liquid PEGDA oligomer was mixed with PVdF-HFP dissolved in ethylene carbonate/dimethyl carbonate/LiPF6 liquid electrolytes

  17. Observations and Tectonic Setting of Historic and Instrumentally Located Earthquakes in the Greater New York CityPhiladelphia Area

    E-Print Network [OSTI]

    in the Greater New York City­Philadelphia Area by Lynn R. Sykes, John G. Armbruster, Won-Young Kim, and Leonardo Seeber Abstract A catalog of 383 earthquakes in southeastern New York, southwestern Connecticut, northern New Jersey, and eastern Pennsylvania, including metropolitan New York City and Philadelphia

  18. Nonthermal radiation of young supernova remnants: The case of Cas A

    SciTech Connect (OSTI)

    Zirakashvili, V. N.; Aharonian, F. A.; Yang, R.; Oña-Wilhelmi, E.; Tuffs, R. J.

    2014-04-20

    The processes responsible for the broadband radiation of the young supernova remnant Cas A are explored by using a new code that is designed for a detailed treatment of the diffusive shock acceleration of particles in the nonlinear regime. The model is based on spherically symmetric hydrodynamic equations complemented with transport equations for relativistic particles. Electrons, protons, and the oxygen ions accelerated by forward and reverse shocks are included in the numerical calculations. We show that the available multi-wavelength observations in the radio, X-ray, and gamma-ray bands can be best explained by invoking particle acceleration by both forward and reversed shocks. Although the TeV gamma-ray observations can be interpreted by interactions of both accelerated electrons and protons/ions, the measurements by Fermi Large Area Telescope at energies below 1 GeV give a tentative preference to the hadronic origin of gamma-rays. Then, the acceleration efficiency in this source, despite the previous claims, should be very high; 25% of the explosion energy (or approximately 3 × 10{sup 50} erg) should already be converted to cosmic rays, mainly by the forward shock. At the same time, the model calculations do not provide extension of the maximum energy of accelerated protons beyond 100 TeV. In this model, the acceleration of electrons is dominated by the reverse shock; the required 10{sup 48} erg can be achieved under the assumption that the injection of electrons (positrons) is supported by the radioactive decay of {sup 44}Ti.

  19. Excitation of Molecular Material Near the Young Stellar Object LkHalpha-234 in NGC 7129

    E-Print Network [OSTI]

    P. W. Morris; A. Noriega-Crespo; F. R. Marleau; H. I. Teplitz; K. I. Uchida; L. Armus

    2004-06-03

    With the Spitzer-IRS we have obtained the first mid-IR spectroscopy of NGC 7129, in the unusually strong outflow and in a ridge of H_2 emission near the Herbig Be star LkHalpha-234. The UV radiation field strength is estimated from PAH band intensities in the H_2 ridge, and from the rotational H_2 emission lines we have deduced aperture average excitation temperatures and column densities in the two regions, finding the H_2 ridge values to be consistent with pumping by UV fluorescence, but also comparable to regions that form H_2 in non-dissociative C-shocks. The H_2 emission in the outflow is consistent with formation by collisional excitation in J-shocks, with shock velocities of 10 - 30 km/sec. A photodissociating component may be present in the outflow, by similarity of S(0) line intensities in both regions. There is no indication of warm dust in the outflow. We also present the first 16um imaging of a Galactic nebula using the unique imaging capabilities of the IRS, and combine with ground-based 2.12um (H_2 1-0 S(1)) imaging. Candidate pre-main sequence objects are clearly evident in these data. We also find extended emission not previously observed around the young B star BD+65 1638, ~22'' across, showing that the region is not free of material as otherwise inferred by recent high angular resolution mapping at submillimeter wavelengths. The presence of this material complicates interpretation of the surrounding CO cavity and origin(s) of the photodissociated region, and further spectroscopic observations are needed to characterize its nature.

  20. 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)

    2009-12-20

    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.

  1. SPIN EVOLUTION OF ACCRETING YOUNG STARS. I. EFFECT OF MAGNETIC STAR-DISK COUPLING

    SciTech Connect (OSTI)

    Matt, Sean P.; Greene, Thomas P.; Pinzon, Giovanni; De la Reza, Ramiro E-mail: thomas.p.greene@nasa.go E-mail: delareza@on.b

    2010-05-10

    We present a model for the rotational evolution of a young, solar mass star interacting with an accretion disk. The model incorporates a description of the angular momentum transfer between the star and the disk due to a magnetic connection, and includes changes in the star's mass and radius and a decreasing accretion rate. The model also includes, for the first time in a spin evolution model, the opening of the stellar magnetic field lines, as expected to arise from twisting via star-disk differential rotation. In order to isolate the effect that this has on the star-disk interaction torques, we neglect the influence of torques that may arise from open field regions connected to the star or disk. For a range of magnetic field strengths, accretion rates, and initial spin rates, we compute the stellar spin rates of pre-main-sequence stars as they evolve on the Hayashi track to an age of 3 Myr. How much the field opening affects the spin depends on the strength of the coupling of the magnetic field to the disk. For the relatively strong coupling (i.e., high magnetic Reynolds number) expected in real systems, all models predict spin periods of less than {approx}3 days, in the age range of 1-3 Myr. Furthermore, these systems typically do not reach an equilibrium spin rate within 3 Myr, so that the spin at any given time depends upon the choice of initial spin rate. This corroborates earlier suggestions that, in order to explain the full range of observed rotation periods of approximately 1-10 days, additional processes, such as the angular momentum loss from powerful stellar winds, are necessary.

  2. Report on enhancing young scholars in science and technology the Center for Excellence in Education

    SciTech Connect (OSTI)

    NONE

    1996-09-30

    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.

  3. The Gemini NICI planet-finding campaign: the orbit of the young exoplanet ? Pictoris b

    SciTech Connect (OSTI)

    Nielsen, Eric L.; Liu, Michael C.; Chun, Mark; Ftaclas, Christ; Wahhaj, Zahed; Biller, Beth A.; Hayward, Thomas L.; Kuchner, Marc J.; Rodigas, Timothy J.; Toomey, Douglas W.

    2014-10-20

    We present new astrometry for the young (12-21 Myr) exoplanet ? Pictoris b taken with the Gemini/NICI and Magellan/MagAO instruments between 2009 and 2012. The high dynamic range of our observations allows us to measure the relative position of ? Pic b with respect to its primary star with greater accuracy than previous observations. Based on a Markov Chain Monte Carlo analysis, we find the planet has an orbital semi-major axis of 9.1{sub ?0.5}{sup +5.3} AU and orbital eccentricity <0.15 at 68% confidence (with 95% confidence intervals of 8.2-48 AU and 0.00-0.82 for semi-major axis and eccentricity, respectively, due to a long narrow degenerate tail between the two). We find that the planet has reached its maximum projected elongation, enabling higher precision determination of the orbital parameters than previously possible, and that the planet's projected separation is currently decreasing. With unsaturated data of the entire ? Pic system (primary star, planet, and disk) obtained thanks to NICI's semi-transparent focal plane mask, we are able to tightly constrain the relative orientation of the circumstellar components. We find the orbital plane of the planet lies between the inner and outer disks: the position angle (P.A.) of nodes for the planet's orbit (211.8 ± 0.°3) is 7.4? greater than the P.A. of the spine of the outer disk and 3.2? less than the warped inner disk P.A., indicating the disk is not collisionally relaxed. Finally, for the first time we are able to dynamically constrain the mass of the primary star ? Pic to 1.76{sub ?0.17}{sup +0.18} M {sub ?}.

  4. 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

    2014-08-22

    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.

  5. SEARCH FOR IONIZED JETS TOWARD HIGH-MASS YOUNG STELLAR OBJECTS

    SciTech Connect (OSTI)

    Guzman, Andres E.; Garay, Guido; Brooks, Kate J.; Voronkov, Maxim A.

    2012-07-01

    We are carrying out multi-frequency radio continuum observations, using the Australia Telescope Compact Array, to systematically search for collimated ionized jets toward high-mass young stellar objects (HMYSOs). Here we report observations at 1.4, 2.4, 4.8, and 8.6 GHz, made with angular resolutions of about 7'', 4'', 2'', and 1'', respectively, toward six objects of a sample of 33 southern HMYSOs thought to be in very early stages of evolution. The objects in the sample were selected from radio and infrared catalogs by having positive radio spectral indices and being luminous (L{sub bol} > 2 Multiplication-Sign 10{sup 4} L{sub Sun }), but underluminous in radio emission compared with that expected from its bolometric luminosity. This criterion makes the radio sources good candidates for being ionized jets. As part of this systematic search, two ionized jets have been discovered: one previously published and the other reported here. The rest of the observed candidates correspond to three hypercompact H II regions and two ultracompact H II regions. The two jets discovered are associated with two of the most luminous (7 Multiplication-Sign 10{sup 4} and 1.0 Multiplication-Sign 10{sup 5} L{sub Sun }) HMYSOs known to harbor this type of object, showing that the phenomena of collimated ionized winds appear in the formation process of stars at least up to masses of {approx}20 M{sub Sun} and provide strong evidence for a disk-mediated accretion scenario for the formation of high-mass stars. From the incidence of jets in our sample, we estimate that the jet phase in high-mass protostars lasts for {approx}4 Multiplication-Sign 10{sup 4} yr.

  6. Ozone induces glucose intolerance and systemic metabolic effects in young and aged brown Norway rats

    SciTech Connect (OSTI)

    Bass, V.; Gordon, C.J.; Jarema, K.A.; MacPhail, R.C.; Cascio, W.E.; Phillips, P.M.; Ledbetter, A.D.; Schladweiler, M.C.; Andrews, D.; Miller, D.; Doerfler, D.L.; Kodavanti, U.P.

    2013-12-15

    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.

  7. Distribution of Circumstellar Disk Masses in the Young Cluster NGC 2024

    E-Print Network [OSTI]

    J. A. Eisner; John M. Carpenter

    2003-08-15

    We determine the distribution of circumstellar disk masses in the young (~0.3 Myr) cluster NGC 2024 by imaging a 2.5'x2.5' region in 3mm continuum emission to an RMS noise level of ~0.75 mJy/beam with the Owens Valley Millimeter Array. The mosaic encompasses 147 K-band sources as well as the molecular ridge seen previously in dust continuum emission. We detect 10 point-like sources in 3mm continuum emission above the level of 5-sigma within the unit gain region of the mosaic. One of these sources corresponds to the near-IR source IRS 2, an early B-type star. Two other sources are tentatively associated with low-mass near-IR cluster members, and the remaining 7 sources have no K-band counterparts. Assuming the millimeter continuum point sources represent emission from circumstellar disks and/or envelopes, then ~6% of the total population (infrared and millimeter sources) in the NGC 2024 mosaic has a circumstellar mass in excess of ~0.06 solar masses. We obtain further constraints on the average circumstellar disk mass by considering the mean millimeter continuum flux observed toward a sample of 140 K-band sources that likely have stellar masses <1-2 Msun. While none of these sources are detected individually above the 3-sigma limit of ~0.035 Msun, the ensemble of sources are detected in the mean at the 5-sigma level with a mean disk mass of ~0.005 Msun. Compared to the older (~2 Myr) cluster IC 348, NGC 2024 contains a higher frequency of massive disks/envelopes and has a higher mean disk mass by a factor of 2.5 +/- 1.3 among K-band sources, suggesting that the mean circumstellar mass is decreasing with cluster age. We also compare the results for the NGC 2024 and IC 348 clusters to those for the lower-density Taurus star forming region.

  8. PHOTOELECTRIC CHARGING OF DUST GRAINS IN THE ENVIRONMENT OF YOUNG STELLAR OBJECTS

    SciTech Connect (OSTI)

    Pedersen, Andreas; Gomez de Castro, Ana I.

    2011-10-20

    The evolution of disks around young stellar objects (YSOs) is deeply affected by the YSOs' ultraviolet (UV) radiation field especially in the 500-1100 A spectral range. The two dominant processes are: the photodissociation of H{sub 2} molecules in the Werner and Lyman bands, and the emission of photoelectrons from dust grains when high energy photons are absorbed. Photoelectrons are an important source of gas heating. In this paper, dust grain charging when exposed to various possible UV fields in the YSOs' environment is investigated. Numerical simulations of the evolution of photoelectrons in the electric field created by the charged dust grains are carried out to obtain the charging profile of dust grains. From the simulations it appears that the different spectra produce significant quantitative and qualitative differences in the charging processes. Both the UV background and the Ae-Herbig star radiation field produce a relatively slow charging of dust grains due to the low fraction of sufficiently energetic photons. The radiation field of T Tauri stars (TTSs) is harder due to the release of magnetic energy in the dense magnetospheric environment. These numerical results have been used to propose a new simple analytical model for grain charging in the atmosphere of protostellar disks around TTSs susceptible to be used in any disk modeling. It has been found that the yield decreases exponentially with the dust charge and that two populations of photoelectrons are produced: a low energy population with mean kinetic energy E = 2.5 eV and a high energy population with E = 5.5-6 eV; the energy dispersion within the populations is {approx}1.3 eV (T {approx} 1.5 x 10{sup 4} K). The high energy population is susceptible of dissociating the H{sub 2} and ionizing some low ionization potential species, such as the Mg. These results add an additional role to dust on the chemistry of the layers just below the H{sub 2} photoionization front. This photoelectic yield has been applied to a simple evaluation of the dust charge in the atmospheres of accretion disks ({alpha}-disks).

  9. BANYAN. II. Very low mass and substellar candidate members to nearby, young kinematic groups with previously known signs of youth

    SciTech Connect (OSTI)

    Gagné, Jonathan; Lafrenière, David; Doyon, René; Malo, Lison; Artigau, Étienne

    2014-03-10

    We present Bayesian Analysis for Nearby Young AssociatioNs II (BANYAN II), a modified Bayesian analysis for assessing the membership of later-than-M5 objects to any of several Nearby Young Associations (NYAs). In addition to using kinematic information (from sky position and proper motion), this analysis exploits 2MASS-WISE color-magnitude diagrams in which old and young objects follow distinct sequences. As an improvement over our earlier work, the spatial and kinematic distributions for each association are now modeled as ellipsoids whose axes need not be aligned with the Galactic coordinate axes, and we use prior probabilities matching the expected populations of the NYAs considered versus field stars. We present an extensive contamination analysis to characterize the performance of our new method. We find that Bayesian probabilities are generally representative of contamination rates, except when a parallax measurement is considered. In this case contamination rates become significantly smaller and hence Bayesian probabilities for NYA memberships are pessimistic. We apply this new algorithm to a sample of 158 objects from the literature that are either known to display spectroscopic signs of youth or have unusually red near-infrared colors for their spectral type. Based on our analysis, we identify 25 objects as new highly probable candidates to NYAs, including a new M7.5 bona fide member to Tucana-Horologium, making it the latest-type member. In addition, we reveal that a known L2? dwarf is co-moving with a bright M5 dwarf, and we show for the first time that two of the currently known ultra red L dwarfs are strong candidates to the AB Doradus moving group. Several objects identified here as highly probable members to NYAs could be free-floating planetary-mass objects if their membership is confirmed.

  10. HERSCHEL FINDS EVIDENCE FOR STELLAR WIND PARTICLES IN A PROTOSTELLAR ENVELOPE: IS THIS WHAT HAPPENED TO THE YOUNG SUN?

    SciTech Connect (OSTI)

    Ceccarelli, C.; López-Sepulcre, A.; Dominik, C.; Kama, M.; Padovani, M.; Caux, E.; Caselli, P.

    2014-07-20

    There is evidence that the young Sun emitted a high flux of energetic (?10 MeV) particles. The collisions of these particles with the material at the inner edge of the Protosolar Nebula disk induced spallation reactions that formed short-lived radionuclei, like {sup 10}Be, whose trace is now visible in some meteorites. However, it is poorly known exactly when this happened, and whether and how it affected the solar system. Here, we present indirect evidence for an ejection of energetic particles in the young protostar, OMC-2 FIR 4, similar to that experienced by the young solar system. In this case, the energetic particles collide with the material in the protostellar envelope, enhancing the abundance of two molecular ions, HCO{sup +} and N{sub 2}H{sup +}, whose presence is detected via Herschel observations. The flux of energetic particles at a distance of 1 AU from the emitting source, estimated from the measured abundance ratio of HCO{sup +} and N{sub 2}H{sup +}, can easily account for the irradiation required by meteoritic observations. These new observations demonstrate that the ejection of ?10 MeV particles is a phenomenon occurring very early in the life of a protostar, before the disappearance of the envelope from which the future star accretes. The whole envelope is affected by the event, which sets constraints on the magnetic field geometry in the source and opens up the possibility that the spallation reactions are not limited to the inner edge of the Protosolar Nebula disk.

  11. The Development of a Self-Rating Instrument to Screen for Learning Disabilities Among Adolescents and Young Adults

    E-Print Network [OSTI]

    Alley, Gordon R.; Deshler, Donald D.; Warner, Michael M.; White, Warren J.

    1982-06-01

    of similar complexity : Some people find sentences like this hard to read: "The palm nut, from which oil is made, is one of the Congo's leading products." a. always a problem for me b. often a problem for me c. not often a problem for me d. not a... problem for me If the student/young adult endorsed either response a or b, the SRSC was administered orally. The item was included to account for persons with extremely poor reading skills. 3. The consumer validity items were changed to reflect the Job...

  12. Brain structural deficits and working memory fMRI dysfunction in young adults who were diagnosed with ADHD in adolescence

    E-Print Network [OSTI]

    Roman-Urrestarazu, Andres; Lindholm, Päivi; Moilanen, Irma; Kiviniemi, Vesa; Miettunen, Jouko; Jääskeläinen, Erika; Mäki, Pirjo; Hurtig, Tuula; Ebeling, Hanna; Barnett, Jennifer H.; Nikkinen, Juha; Suckling, John; Jones, Peter B.; Veijola, Juha; Murray, Graham K.

    2015-01-01

    -based morphometry style pipeline analysis (32-40). We used the default FSL pipeline, including non-linear registration, and modulation, and applying a smoothing kernel of 3 mm. 2.5 Group level statistical analysis of brain structure For the between group... , Heinimaa M, Lindholm P, Jones PB, Barnett JH, Murray GK, Miettunen J. Young people at risk for psychosis: case finding and sample characteristics of the Oulu Brain and Mind Study. Early Intervention in Psychiatry. 2013;7:146-154. 26. Hurtig T, Ebeling...

  13. Possible contribution of low shear modulus C{sub 44} to the low Young's modulus of Ti-36Nb-5Zr alloy

    SciTech Connect (OSTI)

    Meng, Qingkun; Xu, Huibin; Zhao, Xinqing; Guo, Shun; Ren, Xiaobing

    2014-09-29

    Despite the importance of single-crystal elastic constants of ?-phase titanium alloys in understanding their low Young's modulus—a property crucial for many applications, such data are often difficult to obtain when the alloy composition is close to the instability limit of the ? phase, where the presence of ?' martensite precludes the fabrication of ?-phase single crystal. In the present study, we extracted the single-crystal elastic constants of such a ?-phase titanium alloy with low Young's modulus, Ti-36Nb-5Zr (wt.?%), from polycrystalline specimens by using an in-situ synchrotron X-ray diffraction technique. It is indicated that the low Young's modulus of the alloy originates from the anomalously low shear modulus C{sub 44} as well as the low shear modulus C?, which is different from a common viewpoint that the Young's modulus of ?-phase titanium alloys is dominantly controlled by the C?. This suggests that low C{sub 44} is an important contributor to low Young's modulus for instable ?-phase titanium alloys.

  14. EU promises new biofuel rules won't harm the environment http://www.pr-inside.com/eu-promises-new-biofuel-rules-won-t-r385258.htm 1 of 2 1/16/2008 12:32 PM

    E-Print Network [OSTI]

    -inside Special Pages Gold Medal Mortgage Get the latest news with our RSS feed More information Finance EU, rapeseed or sugar cane, to replace polluting oil _ aiming also to cut down on expensive energy imports

  15. 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

    2007-01-22

    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.

  16. The Young Solar Analogs Project: I. Spectroscopic and Photometric Methods and Multi-year Timescale Spectroscopic Results

    E-Print Network [OSTI]

    Gray, R O; Corbally, C J; Briley, M M; Lambert, R A; Fuller, V A; Newsome, I M; Seeds, M F; Kahvaz, Y

    2015-01-01

    This is the first in a series of papers presenting methods and results from the Young Solar Analogs Project, which began in 2007. This project monitors both spectroscopically and photometrically a set of 31 young (300 - 1500 Myr) solar-type stars with the goal of gaining insight into the space environment of the Earth during the period when life first appeared. From our spectroscopic observations we derive the Mount Wilson $S$ chromospheric activity index ($S_{\\rm MW}$), and describe the method we use to transform our instrumental indices to $S_{\\rm MW}$ without the need for a color term. We introduce three photospheric indices based on strong absorption features in the blue-violet spectrum -- the G-band, the Ca I resonance line, and the Hydrogen-$\\gamma$ line -- with the expectation that these indices might prove to be useful in detecting variations in the surface temperatures of active solar-type stars. We also describe our photometric program, and in particular our "Superstar technique" for differential ph...

  17. An Imaging Survey for Extrasolar Planets around 45 Close, Young Stars with SDI at the VLT and MMT

    E-Print Network [OSTI]

    Beth A. Biller; Laird M. Close; Elena Masciadri; Eric Nielsen; Rainer Lenzen; Wolfgang Brandner; Donald McCarthy; Markus Hartung; Stephan Kellner; Eric Mamajek; Thomas Henning; Douglas Miller; Matthew Kenworthy; Craig Kulesa

    2007-05-01

    We present the results of a survey of 45 young (planets. As part of the survey, we observed 54 objects total, of which 45 were close, young stars, 2 were somewhat more distant (planets, and 4 were older, very nearby (cool brown dwarfs and gas giant planets. In our VLT data, we achieved H band contrasts > 10 mag (5 sigma) at a separation of 0.5" from the primary star on 45% of our targets and H band contrasts of > 9 mag at a separation of 0.5'' on 80% of our targets. With this degree of attenuation, we should be able to image (5sigma detection) a 5 M_{Jup} planet 15 AU from a 70 Myr K1 star at 15 pc or a 5 M_{Jup} planet at 2 AU from a 12 Myr M star at 10 pc. We believe that our SDI images are the highest contrast astronomical images ever made from ground or space for methane rich companions planets at semi-major axes of 20-40 AU. Thus, our completeness levels are sufficient to significantly test theoretical planet distributions. From our survey null result, we can rule out (at the 98% confidence/2.0sigma level) a model planet population using a planet distribution where N(a) $\\propto$ constant out to a distance of 45 AU (further model assumptions discussed within).

  18. 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; Marcy, Geoffrey W.; Isaacson, Howard; Howard, Andrew W.; Johnson, John Asher; Torres, Guillermo; Carter, Joshua A.; Dawson, Rebekah I.; Geary, John C.; Campante, Tiago L.; Chaplin, William J.; Davies, Guy R.; Lund, Mikkel N.; Buchhave, Lars A.; Everett, Mark E.; Fischer, Debra A.; Gilliland, Ronald L.; Horch, Elliott P.; and others

    2013-09-20

    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.

  19. Radio Emission from a Young Supernova Remnant Interacting with an Interstellar Cloud: MHD Simulation with Relativistic Electrons

    E-Print Network [OSTI]

    Byung-Il Jun; T. W. Jones

    1998-09-07

    We present two-dimensional MHD simulations of the evolution of a young Type Ia supernova remnant during its interaction with an interstellar cloud of comparable size at impact. We include for the first time in such simulations explicit relativistic electron transport, including spectral information using a simple but effective scheme that follows their acceleration at shocks and subsequent transport. From this information we also model radio synchrotron emission, including spectra. The principal conclusions from these experiments are: 1) Independent of the cloud interaction, the SNR reverse shock can be an efficient site for particle acceleration in a young SNR. 2) At these early times the synchrotron spectral index due to electrons accelerated at the primary shocks should be close to 0.5 unless those shocks are modified by cosmic-ray pressures. However, interaction with the cloud generates regions of distinctly steeper spectra, which may complicate interpretation in terms of global dynamical models for SNR evolution. 3) The internal motions within the SNR become highly turbulent following the cloud interaction. 4) An initially uniform interstellar magnetic field is preferentially amplified along the magnetic equator of the SNR, primarily due to biased amplification by instabilities. Independent of the external field configuration, there is a net radial direction to this field inside the SNR. 5) Filamentary radio structures correlate well with magnetic filaments, while diffuse emission follows the electron distribution. 6) Interaction with the cloud enhances both the electron population and the radio emission.

  20. ndias Independence was won in the backdrop of the great Bengal famine of 1942-43. No

    E-Print Network [OSTI]

    Pal, Debnath

    .2 6.0 5 5 Pulses 26.0 36.6 1 1 Groundnut 28.6 35.2 1 1 Sugarcane 22.6 20.0 2 2 Tea 28.3 18.5 1 2 productivity improvement was also visible in rice, the phenomenon has been described as "Green Revolution". Wheat crop has exhibited a robust growth trend since the onset of the Green Revolution in 1968. In 2001

  1. WHAT TO DO ABOUT CLIMATE CHANGE? Slowing the rate of carbon burning won't stop global warming

    E-Print Network [OSTI]

    Baez, John

    : most CO2 stays in the air over a century, though individual molecules come and go. Global warming. In 2004, Pacala and Socolow said merely holding worldwide carbon emissions constant for 50 years would. Starting now, double existing nuclear power. Replace 1400 gigawatts of coal-burning power plants with gas

  2. Cobalt Catalyst Heterogenized on SBA-15 for p-Xylene Oxidation David Raju Burri, Ki-Won Jun,

    E-Print Network [OSTI]

    Kim, Ji Man

    was filtered and dried at 353 K in a vacuum oven overnight. The product was then slurried in ethanol under reflux condition, filtered, washed with ethanol and dried at 393 K in an oven. The washing resulted materials.1 Cobalt based homogeneous catalytic systems are widely used for this reaction.2 However

  3. 19. Every BIG helps Previously, we saw that we won't be able to meet our energy needs

    E-Print Network [OSTI]

    Ernst, Damien

    " and "technology". Supply could be increased in three ways: 1. by investing in "clean coal" technology 2

  4. Maps, Networks and a Sea That Won’t Conform: Thinking Critically About Marine Spatial Planning in Scotland 

    E-Print Network [OSTI]

    Smith, Glen

    Scotland has adopted marine spatial planning (MSP) as a key instrument of its National Marine Plan. This follows a global trend in shifting marine governance techniques. MSP is turn away from sectoral governance of the sea ...

  5. Best Practices of Print Journalists Who Have Won Awards for Mental-Health Reporting: A Qualitative Interview Study 

    E-Print Network [OSTI]

    Subramanian, Roma

    2012-02-14

    the administration of psychological or pharmacological therapies or both (USDHHS, 1999). Despite the availability of therapies, most people with diagnosable mental disorders do not seek treatment (Rusch, Angermeyer, & Corrigan, 2005; USDHHS, 1999). Stigma has been... questions for this study. Mental illness: an overview. Mental illness refers to diagnosable mental disorders (U.S. Department of Health and Human Services [USDHHS], 1999). These are disorders ?characterized by abnormalities in cognition (organizing...

  6. When Blood Won't Tell: An Intra-Categorical Intersectional Framework for Understanding the Construction of Race

    E-Print Network [OSTI]

    Carbado, Asmara Gabrielle

    2012-01-01

    built an operated two naval shipyards,” a “naval officer andran a manor as well as shipyards, one can infer that he wasIt is possible he used the shipyard to transport slaves who

  7. THE EXTREMELY RED, YOUNG L DWARF PSO J318.5338–22.8603: A FREE-FLOATING PLANETARY-MASS ANALOG TO DIRECTLY IMAGED YOUNG GAS-GIANT PLANETS

    SciTech Connect (OSTI)

    Liu, Michael C.; Magnier, Eugene A.; Kotson, Michael C.; Aller, Kimberly M.; Burgett, W. S.; Chambers, K. C.; Hodapp, K. W.; Jedicke, R.; Kaiser, N.; Kudritzki, R.-P.; Morgan, J. S.; Tonry, J. L.; Wainscoat, R. J.; Deacon, Niall R.; Allers, Katelyn N.; Dupuy, Trent J.; Draper, P. W.; Price, P. A.; Metcalfe, N.

    2013-11-10

    We have discovered using Pan-STARRS1 an extremely red late-L dwarf, which has (J – K){sub MKO} = 2.78 and (J – K){sub 2MASS} = 2.84, making it the reddest known field dwarf and second only to 2MASS J1207–39b among substellar companions. Near-IR spectroscopy shows a spectral type of L7 ± 1 and reveals a triangular H-band continuum and weak alkali (K I and Na I) lines, hallmarks of low surface gravity. Near-IR astrometry from the Hawaii Infrared Parallax Program gives a distance of 24.6 ± 1.4 pc and indicates a much fainter J-band absolute magnitude than field L dwarfs. The position and kinematics of PSO J318.5–22 point to membership in the ? Pic moving group. Evolutionary models give a temperature of 1160{sup +30}{sub -40} K and a mass of 6.5{sup +1.3}{sub -1.0} M {sub Jup}, making PSO J318.5–22 one of the lowest mass free-floating objects in the solar neighborhood. This object adds to the growing list of low-gravity field L dwarfs and is the first to be strongly deficient in methane relative to its estimated temperature. Comparing their spectra suggests that young L dwarfs with similar ages and temperatures can have different spectral signatures of youth. For the two objects with well constrained ages (PSO J318.5–22 and 2MASS J0355+11), we find their temperatures are ?400 K cooler than field objects of similar spectral type but their luminosities are similar, i.e., these young L dwarfs are very red and unusually cool but not 'underluminous'. Altogether, PSO J318.5–22 is the first free-floating object with the colors, magnitudes, spectrum, luminosity, and mass that overlap the young dusty planets around HR 8799 and 2MASS J1207–39.

  8. 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

  9. CCD uvby-beta photometry of young open clusters. I. The double cluster h and chi Persei

    E-Print Network [OSTI]

    G. Capilla; J. Fabregat

    2002-06-04

    We present CCD uvby-beta photometry for stars in the nuclei of the young double cluster h and chi Persei. We find that the reddening is highly variable through the h Persei nucleus, increasing from west to east, with values ranging from E(b-y)=0.328+-0.022 in the western part to E(b-y)=0.465+-0.025 in the south-east. Towards chi Persei the reddening is fairly constant, with E(b-y)=0.398+-0.025. Both clusters share a common distance modulus of 11.7+-0.1 mag., and an age of log t=7.10+-0.05 years.

  10. 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)

    2013-09-01

    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.

  11. Spitzer IRAC Observations of White Dwarfs. II. Massive Planetary and Cold Brown Dwarf Companions to Young and Old Degenerates

    E-Print Network [OSTI]

    J. Farihi; E. E. Becklin; B. Zuckerman

    2008-05-13

    This paper presents a sensitive and comprehensive IRAC 3-8 $\\mu$m photometric survey of white dwarfs for companions in the planetary mass regime with temperatures cooler than the known T dwarfs. The search focuses on descendents of intermediate mass stars with $M\\ga3$ $M_{\\odot}$ whose inner, few hundred AU regions cannot be probed effectively for massive planets and brown dwarfs by any alternative existing method. Furthermore, examination for mid-infrared excess explores an extensive range of orbital semimajor axes, including the intermediate 5-50 AU range poorly covered and incompletely accessible by other techniques at main sequence or evolved stars. Three samples of white dwarfs are chosen which together represent relatively young as well as older populations of stars: 9 open cluster white dwarfs, 22 high mass field white dwarfs, and 17 metal-rich field white dwarfs. In particular, these targets include: 7 Hyads and 4 field white dwarfs of similar age; 1 Pleiad and 19 field white dwarfs of similar age; van Maanen 2 and 16 similarly metal-rich white dwarfs with ages between 1 and 7 Gyr. No substellar companion candidates were identified at any star. By demanding a 15% minimum photometric excess at 4.5 $\\mu$m to indicate a companion detection, upper limits in the planetary mass regime are established at 34 of the sample white dwarfs, 20 of which have limits below 10 $M_{\\rm J}$ according to substellar cooling models. Specifically, limits below the minimum mass for deuterium burning are established at all Pleiades and Hyadeswhite dwarfs, as well as similarly young field white dwarfs, half a dozen of which receive limits at or below 5 $M_{\\rm J}$. Two IRAC epochs at vMa 2 rule out $T\\ga200$ K proper motion companions within 1200 AU.

  12. Our Sun. V. A Bright Young Sun Consistent with Helioseismology and Warm Temperatures on Ancient Earth and Mars

    E-Print Network [OSTI]

    I. -Juliana Sackmann; Arnold I. Boothroyd

    2002-10-05

    The relatively warm temperatures required on early Earth and Mars have been difficult to account for via warming from greenhouse gases. We tested whether this problem can be resolved for both Earth and Mars by a young Sun that is brighter than predicted by the standard solar model. We computed high-precision solar evolutionary models with slightly increased initial masses of M_i = 1.01 to 1.07 M_sun; for each mass, we considered three different mass loss scenarios. We then tested whether these models were consistent with the current high-precision helioseismic observations. The relatively modest mass loss rates in these models are consistent with observational limits from young stars and estimates of the past solar wind obtained from lunar rocks, and do not significantly affect the solar lithium depletion. For appropriate initial masses, all three mass loss scenarios are capable of yielding a solar flux 3.8 Gyr ago high enough to be consistent with water on ancient Mars. We find that all of our mass-losing solar models are consistent with the helioseismic observations. The early solar mass loss of a few percent does indeed leave a small fingerprint on the Sun's internal structure. However, for helioseismology to significantly constrain early solar mass loss would require higher accuracy in the observed solar parameters and input physics, namely, by a factor of about 3 for the observed solar surface composition, and a factor of 2 for the solar interior opacities, the pp nuclear reaction rate, and the diffusion constants for gravitational settling.

  13. 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

  14. 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

  15. Self-Assembly of Multiwall Carbon Nanotubes from Quench-Condensed CNi3 Films D.P. Young, A.B. Karki, and P. W. Adams

    E-Print Network [OSTI]

    Adams, Philip W.

    Self-Assembly of Multiwall Carbon Nanotubes from Quench-Condensed CNi3 Films D.P. Young, A.B. Karki deposition of thin films of the metastable carbides CT3 (T = Ni, Co) onto fire-polished glass sub- strates of carbon out of hot CT3 nanoparticles as they quench-condense onto the substrate. This process is extremely

  16. 3rd Work. for Young Researchers on Human-Friendly Robotics, Oct. 2010, Tubingen, Germany Towards Bilateral Teleoperation of Multi-Robot Systems

    E-Print Network [OSTI]

    3rd Work. for Young Researchers on Human-Friendly Robotics, Oct. 2010, T¨ubingen, Germany Towards Bilateral Teleoperation of Multi-Robot Systems Paolo Robuffo Giordano, Antonio Franchi, Hyoung Il Son control strategy for the bilateral teleoperation of multi-robot systems, by espe- cially focusing

  17. Control of Large-Scale Heat Transport by Small-Scale Mixing PAOLA CESSI, W. R. YOUNG, AND JEFF A. POLTON

    E-Print Network [OSTI]

    Young, William R.

    Control of Large-Scale Heat Transport by Small-Scale Mixing PAOLA CESSI, W. R. YOUNG, AND JEFF A of entropy production, mechanical energy balance, and heat trans- port. The flow is rapidly rotating in terms of the external parameters. The scaling theory predicts relations between heat transport

  18. 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

  19. Guidelines for CO2 Euthanasia of Poultry and Young Swine The AVMA Guidelines for the Euthanasia of Animals: 2013 Edition does not specifically address the best

    E-Print Network [OSTI]

    Chen, Deming

    1 Guidelines for CO2 Euthanasia of Poultry and Young Swine The AVMA Guidelines for the Euthanasia of Animals: 2013 Edition does not specifically address the best practices for CO2 euthanasia of swine of poultry and swine with CO2 are appropriate. It is standard practice in all cases to assure that adequate

  20. Low Voltage High-SNR Pipeline Data Converters Charles Myers, Jipeng Li, Dong-Young Chang, and Un-Ku Moon

    E-Print Network [OSTI]

    Moon, Un-Ku

    Low Voltage High-SNR Pipeline Data Converters Charles Myers, Jipeng Li, Dong-Young Chang, and Un pipeline data converter. This is accomplished with the removal of the S/H input stage and the use of a rail limitations. In pipeline data converters, noise reduction options such as oversampling and noise shaping

  1. 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

  2. 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)

    2014-02-20

    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.

  3. 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

    2007-04-10

    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.

  4. 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

    2006-10-16

    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.

  5. The evolution of surface magnetic fields in young solar-type stars I: the first 250 Myr

    E-Print Network [OSTI]

    Folsom, C P; Bouvier, J; Lèbre, A; Amard, L; Palacios, A; Morin, J; Donati, J -F; Jeffers, S V; Marsden, S C; Vidotto, A A

    2016-01-01

    The surface rotation rates of young solar-type stars vary rapidly with age from the end of the pre-main sequence through the early main sequence. Important changes in the dynamos operating in these stars may result from this evolution, which should be observable in their surface magnetic fields. Here we present a study aimed at observing the evolution of these magnetic fields through this critical time period. We observed stars in open clusters and stellar associations of known ages, and used Zeeman Doppler Imaging to characterize their complex magnetic large-scale fields. Presented here are results for 15 stars, from 5 associations, with ages from 20 to 250 Myr, masses from 0.7 to 1.2 solar masses, and rotation periods from 0.4 to 6 days. We find complex large-scale magnetic field geometries, with global average strengths from 14 to 140 G. There is a clear trend towards decreasing average large-scale magnetic field strength with age, and a tight correlation between magnetic field strength and Rossby number. ...

  6. 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.

    1985-01-01

    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.

  7. DYNAMICAL EVIDENCE FOR A MAGNETOCENTRIFUGAL WIND FROM A 20 M{sub Sun} BINARY YOUNG STELLAR OBJECT

    SciTech Connect (OSTI)

    Greenhill, L. J.; Goddi, C.; Humphreys, E. M. L.; Chandler, C. J.; Matthews, L. D.

    2013-06-20

    In Orion BN/KL, proper motions of {lambda}7 mm vibrationally excited SiO masers trace the rotation of a nearly edge-on disk and a bipolar wide-angle outflow 10-100 AU from radio source I, a binary young stellar object of {approx}20 M{sub Sun }. Here we map ground-state {lambda}7 mm SiO emission with the Very Large Array and track proper motions over 9 yr. The innermost and strongest emission lies in two extended arcs bracketing Source I. The proper motions trace a northeast-southwest bipolar outflow 100-1000 AU from Source I with a median three-dimensional motion of {approx}18 km s{sup -1}. An overlying distribution of {lambda}1.3 cm H{sub 2}O masers betrays similar flow characteristics. Gas dynamics and emission morphology traced by the masers suggest the presence of a magnetocentrifugal disk wind. Reinforcing evidence lies in the colinearity of the flow, apparent rotation across the flow parallel to the disk rotation, and recollimation that narrows the flow opening angle {approx}120 AU downstream. The arcs of ground-state SiO emission may mark the transition point to a shocked super-Alfvenic outflow.

  8. Fermi-LAT Discovery of GeV Gamma-ray Emission from the Young Supernova Remnant Cassiopeia A

    SciTech Connect (OSTI)

    Abdo, A.A.

    2011-08-19

    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.

  9. Discovery of extended VHE \\gamma-ray emission from the vicinity of the young massive stellar cluster Westerlund 1

    E-Print Network [OSTI]

    Abramowski, A; Aharonian, F; Akhperjanian, A G; Anton, G; Balzer, A; Barnacka, A; de Almeida, U Barres; Becherini, Y; Becker, J; Behera, B; Bernlöhr, K; Birsin, E; Biteau, J; Bochow, A; Boisson, C; Bolmont, J; Bordas, P; Brucker, J; Brun, F; Brun, P; Bulik, T; Büsching, I; Carrigan, S; Casanova, S; Cerruti, M; Chadwick, P M; Charbonnier, A; Chaves, R C G; Cheesebrough, A; Chounet, L -M; Clapson, A C; Coignet, G; Cologna, G; Conrad, J; Dalton, M; Daniel, M K; Davids, I D; Degrange, B; Deil, C; Dickinson, H J; Djannati-Ataï, A; Domainko, W; Drury, L O'C; Dubois, F; Dubus, G; Dutson, K; Dyks, J; Dyrda, M; Egberts, K; Eger, P; Espigat, P; Fallon, L; Farnier, C; Fegan, S; Feinstein, F; Fernandes, M V; Fiasson, A; Fontaine, G; Förster, A; Füßling, M; Gallant, Y A; Gast, H; Gérard, L; Gerbig, D; Giebels, B; Glicenstein, J F; Glück, B; Goret, P; Göring, D; Häffner, S; Hague, J D; Hampf, D; Hauser, M; Heinz, S; Heinzelmann, G; Henri, G; Hermann, G; Hinton, J A; Hoffmann, A; Hofmann, W; Hofverberg, P; Holler, M; Horns, D; Jacholkowska, A; de Jager, O C; Jahn, C; Jamrozy, M; Jung, I; Kastendieck, M A; Katarzynski, K; Katz, U; Kaufmann, S; Keogh, D; Khangulyan, D; Khélifi, B; Klochkov, D; Klu?niak, W; Kneiske, T; Komin, Nu; Kosack, K; Kossakowski, R; Laffon, H; Lamanna, G; Lennarz, D; Lohse, T; Lopatin, A; Lu, C -C; Marandon, V; Marcowith, A; Masbou, J; Maurin, D; Maxted, N; Mayer, M; McComb, T J L; Medina, M C; Méhault, J; Moderski, R; Moulin, E; Naumann, C L; Naumann-Godo, M; de Naurois, M; Nedbal, D; Nekrassov, D; Nguyen, N; Nicholas, B; Niemiec, J; Nolan, S J; Ohm, S; Wilhelmi, E de Ona; Opitz, B; Ostrowski, M; Oya, I; Panter, M; Arribas, M Paz; Pedaletti, G; Pelletier, G; Petrucci, P -O; Pita, S; Pühlhofer, G; Punch, M; Quirrenbach, A; Raue, M; Rayner, S M; Reimer, A; Reimer, O; Renaud, M; Reyes, R de los; Rieger, F; Ripken, J; Rob, L; Rosier-Lees, S; Rowell, G; Rudak, B; Rulten, C B; Ruppel, J; Sahakian, V; Sanchez, D; Santangelo, A; Schlickeiser, R; Schöck, F M; Schulz, A; Schwanke, U; Schwarzburg, S; Schwemmer, S; Sheidaei, F; Sikora, M; Skilton, J L; Sol, H; Spengler, G; Stawarz, L; Steenkamp, R; Stegmann, C; Stinzing, F; Stycz, K; Sushch, I; Szostek, A; Tavernet, J -P; Terrier, R; Tluczykont, M; Valerius, K; van Eldik, C; Vasileiadis, G; Venter, C; Vialle, J P; Viana, A; Vincent, P; Völk, H J; Volpe, F; Vorobiov, S; Vorster, M; Wagner, S J; Ward, M; White, R; Wierzcholska, A; Zacharias, M; Zajczyk, A; Zdziarski, A A; Zech, A; Zechlin, H -S

    2011-01-01

    Results obtained in very-high-energy (VHE; E > 100 GeV) \\gamma-ray observations performed with the H.E.S.S. telescope array are used to investigate particle acceleration processes in the vicinity of the young massive stellar cluster Westerlund 1 (Wd 1). Imaging of Cherenkov light from \\gamma-ray induced particle cascades in the Earth's atmosphere is used to search for VHE \\gamma\\ rays from the region around Wd 1. Possible catalogued counterparts are searched for and discussed in terms of morphology and energetics of the H.E.S.S. source. The detection of the degree-scale extended VHE \\gamma-ray source HESS J1646-458 is reported based on 45 hours of H.E.S.S. observations performed between 2004 and 2008. The VHE \\gamma-ray source is centred on the nominal position of Wd 1 and detected with a total statistical significance of ~20\\sigma. The emission region clearly extends beyond the H.E.S.S. point-spread function (PSF). The differential energy spectrum follows a power law in energy with an index of \\Gamma=2.19 \\p...

  10. Three-dimensional simulations of the non-thermal broadband emission from young supernova remnants including efficient particle acceleration

    SciTech Connect (OSTI)

    Ferrand, Gilles; Safi-Harb, Samar [Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2 (Canada); Decourchelle, Anne, E-mail: gferrand@physics.umanitoba.ca, E-mail: samar@physics.umanitoba.ca, E-mail: anne.decourchelle@cea.fr [Laboratoire AIM (CEA/Irfu, CNRS/INSU, Université Paris VII), CEA Saclay, bât. 709, F-91191 Gif sur Yvette (France)

    2014-07-01

    Supernova remnants are believed to be major contributors to Galactic cosmic rays. In this paper, we explore how the non-thermal emission from young remnants can be used to probe the production of energetic particles at the shock (both protons and electrons). Our model couples hydrodynamic simulations of a supernova remnant with a kinetic treatment of particle acceleration. We include two important back-reaction loops upstream of the shock: energetic particles can (1) modify the flow structure and (2) amplify the magnetic field. As the latter process is not fully understood, we use different limit cases that encompass a wide range of possibilities. We follow the history of the shock dynamics and of the particle transport downstream of the shock, which allows us to compute the non-thermal emission from the remnant at any given age. We do this in three dimensions, in order to generate projected maps that can be compared with observations. We observe that completely different recipes for the magnetic field can lead to similar modifications of the shock structure, although to very different configurations of the field and particles. We show how this affects the emission patterns in different energy bands, from radio to X-rays and ?-rays. High magnetic fields (>100 ?G) directly impact the synchrotron emission from electrons, by restricting their emission to thin rims, and indirectly impact the inverse Compton emission from electrons and also the pion decay emission from protons, mostly by shifting their cut-off energies to respectively lower and higher energies.

  11. 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)

    1994-10-01

    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.

  12. 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

    1988-01-01

    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...

  13. LMS-CMI Research Schools aim to provide training for young researchers in core areas of mathematics. Students and post-docs can meet a number of leading experts in the topic as well as other young researchers working in related areas.

    E-Print Network [OSTI]

    LMS-CMI Research Schools aim to provide training for young researchers in core areas of mathematics working in related areas. The LMS is the UK's learned society for mathematics. Registered charity no. 252660 (www.lms.ac.uk) The CMI is charitable private operating foundation, incorporated in the USA

  14. The slow ionized wind and rotating disklike system that are associated with the high-mass young stellar object G345.4938+01.4677

    SciTech Connect (OSTI)

    Guzmán, Andrés E.; Garay, Guido; Bronfman, Leonardo; Mardones, Diego; Rodríguez, Luis F.; Moran, James; Brooks, Kate J.; Nyman, Lars-Åke; Sanhueza, Patricio

    2014-12-01

    We report the detection, made using ALMA, of the 92 GHz continuum and hydrogen recombination lines (HRLs) H40?, H42?, and H50? emission toward the ionized wind associated with the high-mass young stellar object G345.4938+01.4677. This is the luminous central dominating source located in the massive and dense molecular clump associated with IRAS 16562–3959. The HRLs exhibit Voigt profiles, which is a strong signature of Stark broadening. We successfully reproduce the observed continuum and HRLs simultaneously using a simple model of a slow ionized wind in local thermodynamic equilibrium, with no need for a high-velocity component. The Lorentzian line wings imply electron densities of 5 × 10{sup 7} cm{sup –3} on average. In addition, we detect SO and SO{sub 2} emission arising from a compact (?3000 AU) molecular core associated with the central young star. The molecular core exhibits a velocity gradient that is perpendicular to the jet-axis, which we interpret as evidence of rotation. The set of observations toward G345.4938+01.4677 are consistent with it being a young high-mass star associated with a slow photo-ionized wind.

  15. Jaw Dysfunction Related to Pterygoid and Masseter Muscle Dosimetry After Radiation Therapy in Children and Young Adults With Head-and-Neck Sarcomas

    SciTech Connect (OSTI)

    Krasin, Matthew J., E-mail: matthew.krasin@stjude.org [Department of Radiological Sciences, St. Jude Children's Research Hospital, Memphis, TN (United States); Wiese, Kristin M. [Department of Rehabilitation Services, St. Jude Children's Research Hospital, Memphis, TN (United States); Spunt, Sheri L. [Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN (United States); Department of Pediatrics, University of Tennessee College of Medicine, Memphis, TN (United States); Hua, Chia-ho [Department of Radiological Sciences, St. Jude Children's Research Hospital, Memphis, TN (United States); Daw, Najat [Department of Pediatrics, University of Tennessee College of Medicine, Memphis, TN (United States); Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN (United States); Navid, Fariba [Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN (United States); Department of Pediatrics, University of Tennessee College of Medicine, Memphis, TN (United States); Davidoff, Andrew M. [Department of Surgery, St. Jude Children's Research Hospital, Memphis, TN (United States); Department of Surgery, University of Tennessee College of Medicine, Memphis, TN (United States); McGregor, Lisa [Department of Oncology, St. Jude Children's Research Hospital, Memphis, TN (United States); Department of Pediatrics, University of Tennessee College of Medicine, Memphis, TN (United States); Merchant, Thomas E.; Kun, Larry E. [Department of Radiological Sciences, St. Jude Children's Research Hospital, Memphis, TN (United States); McCrarey, Lola [Department of Rehabilitation Services, St. Jude Children's Research Hospital, Memphis, TN (United States); and others

    2012-01-01

    Purpose: To investigate the relationship between jaw function, patient and treatment variables, and radiation dosimetry of the mandibular muscles and joints in children and young adults receiving radiation for soft-tissue and bone sarcomas. Methods and Materials: Twenty-four pediatric and young adult patients with head-and-neck sarcomas were treated on an institutional review board-approved prospective study of focal radiation therapy for local tumor control. Serial jaw depression measurements were related to radiation dosimetry delivered to the medial and lateral pterygoid muscles, masseter muscles, and temporomandibular joints to generate mathematical models of jaw function. Results: Baseline jaw depression was only influenced by the degree of surgical resection. In the first 12 weeks from initiation of radiation, surgical procedures greater than a biopsy, administration of cyclophosphamide containing chemotherapy regimes, and large gross tumor volumes adversely affected jaw depression. Increasing dose to the pterygoid and masseter muscles above 40 Gy predicted loss of jaw function over the full course of follow-up. Conclusions: Clinical and treatment factors are related to initial and subsequent jaw dysfunction. Understanding these complex interactions and the affect of specific radiation doses may help reduce the risk for jaw dysfunction in future children and young adults undergoing radiation therapy for the management of soft-tissue and bone sarcomas.

  16. Component-specific electromechanical response in a ferroelectric/dielectric superlattice Ji Young Jo,1 Rebecca J. Sichel,1 Eric M. Dufresne,2 Ho Nyung Lee,3 Serge M. Nakhmanson,4 and Paul G. Evans1

    E-Print Network [OSTI]

    Evans, Paul G.

    Component-specific electromechanical response in a ferroelectric/dielectric superlattice Ji Young The electronic and electromechanical properties of complex oxide superlattices are closely linked distortion is shared between the two components. Theoretical predictions of the electromechanical properties

  17. 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

    2007-01-01

    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 ...

  18. In vivo treatment with diphenyl ditelluride induces neurodegeneration in striatum of young rats: Implications of MAPK and Akt pathways

    SciTech Connect (OSTI)

    Heimfarth, Luana; Loureiro, Samanta Oliveira; Dutra, Márcio Ferreira; Andrade, Cláudia; Pettenuzzo, Letícia; Guma, Fátima T. Costa Rodrigues; Gonçalves, Carlos Alberto Saraiva [Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Porto Alegre, RS (Brazil)] [Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Porto Alegre, RS (Brazil); Batista Teixeira da Rocha, João [Departamento de Química, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS Brazil (Brazil); Pessoa-Pureur, Regina, E-mail: rpureur@ufrgs.br [Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Porto Alegre, RS (Brazil)] [Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, UFRGS, Porto Alegre, RS (Brazil)

    2012-10-15

    In the present report 15 day-old Wistar rats were injected with 0.3 ?mol of diphenyl ditelluride (PhTe){sub 2}/kg body weight and parameters of neurodegeneration were analyzed in slices from striatum 6 days afterwards. We found hyperphosphorylation of intermediate filament (IF) proteins from astrocyte (glial fibrillary acidic protein—GFAP and vimentin) and from neuron (low-, medium- and high molecular weight neurofilament subunits: NF-L, NF-M and NF-H, respectively) and increased MAPK (Erk, JNK and p38MAPK) as well as PKA activities. The treatment induced reactive astrogliosis in the striatum, evidenced by increased GFAP and vimentin immunocontent as well as their mRNA overexpression. Also, (PhTe){sub 2} significantly increased the propidium iodide (PI) positive cells in NeuN positive population without altering PI incorporation into GFAP positive cells, indicating that in vivo exposure to (PhTe){sub 2} provoked neuronal damage. Immunohistochemistry showed a dramatic increase of GFAP staining characteristic of reactive astrogliosis. Moreover, increased caspase 3 in (PhTe){sub 2} treated striatal slices suggested apoptotic cell death. (PhTe){sub 2} exposure decreased Akt immunoreactivity, however phospho-GSK-3-? (Ser9) was unaltered, suggesting that this kinase is not directly implicated in the neurotoxicity of this compound. Therefore, the present results shed light into the mechanisms of (PhTe){sub 2}-induced neurodegeneration in rat striatum, evidencing a critical role for the MAPK and Akt signaling pathways and disruption of cytoskeletal homeostasis, which could be related with apoptotic neuronal death and astrogliosis. -- Highlights: ? Diphenyl ditelluride causes apoptotic neuronal death in the striatum of young rats. ? Diphenyl ditelluride causes reactive astrogliosis in the striatum of rats. ? Diphenyl ditelluride disrupts the homeostasis of the cytoskeleton of the striatum. ? The actions of diphenyl ditelluride are mediated by MAPK and Akt signaling pathways.

  19. Yunge Libe/ Young Love

    E-Print Network [OSTI]

    Jacob Friedman, Yankl Fridman/

    1980-01-01

    px ,yw8a ÎW^ÎI n ; û"n H /inox ,yiyii" H px ,jni8'? p8Btoiyn .payp -18 D*X aiy^a inox /pp OJ$TI$I -px ,"ii .T"aw a*a^aiiayn pn -18 pyayi D*X inox &$n ,oy,ayï8ii axi^o X ,|nn

  20. Introduction Ernst&Young

    E-Print Network [OSTI]

    Banbara, Mutsunori

    Engineering & Shipbuilding Co., Ltd., LG Electronics, Altech Corporation, Kubota Corporation, BROOMBERG L

  1. THE GEMINI/NICI PLANET-FINDING CAMPAIGN: THE FREQUENCY OF PLANETS AROUND YOUNG MOVING GROUP STARS

    SciTech Connect (OSTI)

    Biller, Beth A.; Ftaclas, Christ; Liu, Michael C.; Wahhaj, Zahed; Nielsen, Eric L.; Hayward, Thomas L.; Hartung, Markus; Chun, Mark; Clarke, Fraser; Thatte, Niranjan; Shkolnik, Evgenya L.; Reid, I. Neill; Boss, Alan; Lin, Douglas; Alencar, Silvia H. P.; De Gouveia Dal Pino, Elisabete; Gregorio-Hetem, Jane [Universidade de Sao Paulo, IAG and others

    2013-11-10

    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.

  2. 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

    2011-09-19

    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.

  3. The PUCOT for measuring dynamic Young's modulus for the B?-CoAl, FeAl and NiAl alloys 

    E-Print Network [OSTI]

    Harmouche, Mahmoud Redwan

    1984-01-01

    element alloying addition, and high potential for plastic flow at high temperatures. In addition, they have remarkable mechanical properties [2] . The melting temperature for the CoA1 and NiA1 systems is about 1900 K while that of the FeA1 is about..., measurements are a lot more time consum- ing. This is usually the case in physical and mechanical property . measurements but the actual time required to run a test (after preparation) is less than one hour. The validity of the measured Young's moduli using...

  4. THE GEMINI NICI PLANET-FINDING CAMPAIGN: DISCOVERY OF A CLOSE SUBSTELLAR COMPANION TO THE YOUNG DEBRIS DISK STAR PZ Tel

    SciTech Connect (OSTI)

    Biller, Beth A.; Liu, Michael C.; Wahhaj, Zahed; Dupuy, Trent J.; Ftaclas, Christ; Nielsen, Eric L.; Close, Laird M.; Males, Jared; Skemer, Andrew; Hayward, Thomas L.; Hartung, Markus; Chun, Mark; Clarke, Fraser; Tecza, Matthias; Thatte, Niranjan; Reid, I. Neill; Shkolnik, Evgenya L.; Alencar, Silvia H. P.; Artymowicz, Pawel

    2010-09-01

    We report the discovery of a tight substellar companion to the young solar analog PZ Tel, a member of the {beta} Pic moving group observed with high-contrast adaptive optics imaging as part of the Gemini Near-Infrared Coronagraphic Imager Planet-Finding Campaign. The companion was detected at a projected separation of 16.4 {+-} 1.0 AU (0.''33 {+-} 0.''01) in 2009 April. Second-epoch observations in 2010 May demonstrate that the companion is physically associated and shows significant orbital motion. Monte Carlo modeling constrains the orbit of PZ Tel B to eccentricities >0.6. The near-IR colors of PZ Tel B indicate a spectral type of M7 {+-} 2 and thus this object will be a new benchmark companion for studies of ultracool, low-gravity photospheres. Adopting an age of 12{sup +8} {sub -4} Myr for the system, we estimate a mass of 36 {+-} 6 M {sub Jup} based on the Lyon/DUSTY evolutionary models. PZ Tel B is one of the few young substellar companions directly imaged at orbital separations similar to those of giant planets in our own solar system. Additionally, the primary star PZ Tel A shows a 70 {mu}m emission excess, evidence for a significant quantity of circumstellar dust that has not been disrupted by the orbital motion of the companion.

  5. ROSAT X-ray Spectral Properties of Nearby Young Associations: TW Hydrae, Tucana-Horologium, and the beta Pic Moving Group

    E-Print Network [OSTI]

    Joel H. Kastner; Lara Crigger; Margaret Rich; David A. Weintraub

    2002-11-15

    We present archival ROSAT data for three recently identified, nearby (DPic Moving Group. The distributions of ROSAT X-ray hardness ratios (HR1, HR2) for these three groups, whose membership is dominated by low-mass, weak-lined T Tauri stars, are tightly clustered and very similar to one another. The value of HR1 for TW Hya itself -- the only bona fide classical T Tauri star in any of the nearby groups -- is clearly anomalous among these nearby young stars. We compare the hardness ratio distributions of stars in the three nearby groups with those of T Tauri stars, the Hyades, and main sequence dwarfs in the field. This comparison demonstrates that the X-ray spectra of F through M stars soften with age, and that F and G stars evolve more rapidly in X-ray spectral hardness than do K and M stars. It is as yet unclear whether this trend can be attributed to age-dependent changes in the intrinsic X-ray spectra of stars of type F and later, to a decrease in the column density of circumstellar gas (e.g., in residual protoplanetary disks), or to the diminishing contributions of star-disk interactions to X-ray emission. Regardless, these results demonstrate that analysis of archival ROSAT X-ray spectral data can help both to identify nearby, young associations and to ascertain the X-ray emission properties of members of known associations.

  6. 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

    2013-04-02

    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.

  7. 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.

    2010-07-30

    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.

  8. A Systematic Study of X-Ray Flares from Low-Mass Young Stellar Objects in the Rho Ophiuchi Star-Forming Region with Chandra

    E-Print Network [OSTI]

    K. Imanishi; H. Nakajima; M. Tsujimoto; K. Koyama; Y. Tsuboi

    2003-05-10

    We report on the results of a systematic study of X-ray flares from low-mass young stellar objects, using Chandra observations of the main region of the Rho Oph. From 195 X-ray sources, including class I-III sources and some young brown dwarfs, we detected a total of 71 X-ray flares. Most of the flares have the typical profile of solar and stellar flares, fast rise and slow decay. We derived the time-averaged temperature (kT), luminosity (L_X), rise and decay timescales (tau_r and tau_d) of the flares, finding that (1) class I-II sources tend to have a high kT, (2) the distribution of L_X during flares is nearly the same for all classes, and (3) positive and negative log-linear correlations are found between tau_r and tau_d, and kT and tau_r. In order to explain these relations, we used the framework of magnetic reconnection model to formulate the observational parameters as a function of the half-length of the reconnected magnetic loop (L) and magnetic field strength (B). The estimated L is comparable to the typical stellar radius of these objects (10^{10-11} cm), which indicates that the observed flares are triggered by solar-type loops, rather than larger ones (10^{12} cm) connecting the star with its inner accretion disk. The higher kT observed for class I sources may be explained by a higher magnetic field strength (about 500 G) than for class II-III sources (200-300 G).

  9. According to the Prevention Institute, guns claim 30,000 lives every year, particularly young blacks and Hispanics. The level of anguish and outrage should be no less than what we feel in response to that day in

    E-Print Network [OSTI]

    According to the Prevention Institute, guns claim 30,000 lives every year, particularly young: "Public health has a role to play in preventing gun violence in America." The Nation's Health, February 2013, p.3) In this issue: Editorial: Gun Violence Prevention Advocacy Town Hall Meeting: The Power

  10. Computational materials science and engineering (CMSE) is a relatively young field. The first-known case study of materials that used digital computers was made shortly after the Second World

    E-Print Network [OSTI]

    Li, Mo

    at the time was on how irradiation of high-energy particles would change a material's structure and properties these advanced tools allows us to more efficiently develop new materials and extend the life~~ * ~~ Computational materials science and engineering (CMSE) is a relatively young field

  11. The NCCR Climate, Switzerland`s Centre of Excellence in Climate and Climate Impact Research, invites young scientists to join leading climate researchers in a scenic Swiss Alpine setting for keynote lectures, workshops

    E-Print Network [OSTI]

    Richner, Heinz

    The NCCR Climate, Switzerland`s Centre of Excellence in Climate and Climate Impact Research, invites young scientists to join leading climate researchers in a scenic Swiss Alpine setting for keynote lectures, workshops and poster sessions on the occasion of the 12th NCCR Climate Summer School 2013

  12. A Model-Based Framework for Developing and Deploying Data Aggregation Services

    E-Print Network [OSTI]

    Prasanna, Viktor K.

    A Model-Based Framework for Developing and Deploying Data Aggregation Services Ramakrishna Soma1 , Amol Bakshi2 , V.K.Prasanna2 , Will Da Sie3 1 Dept of Computer Science, USC, Los Angeles, CA 2 Dept of Electrical Engineering, USC, Los Angeles, CA {rsoma, amol, prasanna}@usc.edu 3 Chevron Corporation, San Ramon

  13. Reactive Robots and Amnesics : A Comparative Study in Memoryless Behavior

    E-Print Network [OSTI]

    Mali, Amol D.

    for Robotics I.I.T. Kanpur, India 208016 e-mail: amit@iitk.ernet.in Amol D. Mali (Member, IEEE) Dept. of Computer Science & Engg. Arizona State University, Tempe, AZ 85287-5406 e-mail: amol.mali@asu.edu Submitted

  14. Novel a-Si:H TFT pixel circuit for electrically stable top-anode light-emitting Juhn Suk Yoo

    E-Print Network [OSTI]

    Kanicki, Jerzy

    Novel a-Si:H TFT pixel circuit for electrically stable top-anode light-emitting AMOLEDs Juhn Suk for electrically stable AMOLEDs with an a-Si:H TFT backplane and top-anode organic light-emitting diode is reported. The OLED current compensation for drive TFT threshold voltage variation has been verified using SPICE

  15. 1322 IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 48, NO. 7, JULY 2001 Improved A-Si:H TFT Pixel Electrode Circuits for

    E-Print Network [OSTI]

    Kanicki, Jerzy

    with the organic light-emitting device (OLED) having an external quantum efficiency of 1%. These pixel elec- trode circuits can potentially be used for the active-matrix organic light-emitting displays (AM-OLEDs). I techniques for the organic light-emitting displays (OLEDs) [1]­[4]. AM-OLED driving schemes based on one thin

  16. IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 52, NO. 6, JUNE 2005 1123 A Novel Current-Scaling a-Si:H TFTs Pixel

    E-Print Network [OSTI]

    Kanicki, Jerzy

    -matrix organic light-emitting dis- plays (AM-OLEDs). In contrast to the conventional current mirror pixel electrode circuit, in this circuit a high data-to-organic light-emitting device (OLED) current ratio can--Active-matrix, active-matrix organic light-emit- ting displays (AM-OLEDs), current driving, current scaling, light

  17. IEEE TRANSACTIONS ON ELECTRON DEVICES, VOL. 54, NO. 9, SEPTEMBER 2007 2403 Current-Scaling a-Si:H TFT Pixel-Electrode Circuit

    E-Print Network [OSTI]

    Kanicki, Jerzy

    -electrode circuit. Index Terms--Active-matrix organic light-emitting display (AM-OLED), current program, current-Si:H TFT Pixel-Electrode Circuit for AM-OLEDs: Electrical Properties and Stability Hojin Lee, Yen-Chung Lin- electrode circuit with the current-scaling function that can be used for active-matrix organic light

  18. Discrete-Time, Bi-Cumulant Minimax and Nash Games Ronald W. Diersing, Michael K. Sain, and Chang-Hee Won

    E-Print Network [OSTI]

    Won, Chang-Hee

    Discrete-Time, Bi-Cumulant Minimax and Nash Games Ronald W. Diersing, Michael K. Sain, and Chang player, Nash and minimax cumulant games will be formulated and developed for a nonlinear system with non, a cumulant based, discrete time, Nash game will be developed. At first we will consider a nonlinear system

  19. ?"Won't we never get out of this state??": western soldiers in post-civil war Texas, 1865-1866 

    E-Print Network [OSTI]

    Beall, Jonathan Andrew

    2005-02-17

    the movements from wartime positions in Tennessee and Alabama to peacetime posts within Texas. The study examines Texan-soldier relations as they differed from place to place. It also investigates the Westerners? peacetime occupation duties... to supplement the existing historiography of the army in Texas during Reconstruction. Broadly, this thesis also hopes to be a more general look at the use of citizen soldiers for postwar occupation duty. v To my family and friends...

  20. The Japan Times Printer Friendly Articles France has won the competition to host the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear-

    E-Print Network [OSTI]

    the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear- fusion reactor. Japan fought for nuclear energy in Japan. The controversies surrounding the Monju fast-breeder-reactor project -- nuclear-fusion reactions -- to produce energy. Scientists at the ITER plant will create nuclear

  1. You won`t find these leaks with a blower door: The latest in {open_quotes}leaking electricity{close_quotes} in homes

    SciTech Connect (OSTI)

    Rainer, L.; Greenberg, S.; Meier, A.

    1996-08-01

    Leaking electricity is the energy consumed by appliances when they are switched off or not performing their principal functions. Field measurements in Florida, California, and Japan show that leaking electricity represents 50 to 100 Watts in typical homes, corresponding to about 5 GW of total electricity demand in the United States. There are three strategies to reduce leaking electricity: eliminate leakage entirely, eliminate constant leakage and replace with intermittent charge plus storage, and improve efficiency of conversion. These options are constrained by the low value of energy savings-less than $5 per saved Watt. Some technical and lifestyle solutions are proposed. 13 refs., 1 fig., 2 tabs.

  2. Modeling Leakage through Faults of CO2 Stored in an Aquifer Kyung Won Chang,* Susan E. Minkoff,** and Steven L. Bryant,* SPE

    E-Print Network [OSTI]

    Minkoff, Susan E.

    for drinking water. Thus, CO2 leakage along faults will have three behaviors: upward migration from the storage. The difference arises because of preferential flow within the layer (CO2 in the upper part, water below

  3. Signal Source Localization with Tetrodes: Experimental Verification Chang Won Lee, Christine E. King, Shun Chi Wu, A. Lee Swindlehurst, and Zoran Nenadic

    E-Print Network [OSTI]

    Swindlehurst, A. Lee

    for extracellular recording of neuronal action potentials have significantly increased the signal-to-noise ratio (SNR) in neurophysiological experiments, ultimately leading to a more accurate interpretation of neurons whose activities are being recorded. This study introduces the multiple signal classification

  4. Volume 25, Number 2 Published by the UNIVERSITY OF CALIFORNIA BOTANICAL GARDEN at Berkeley Spring 2000 The University of California Botanical Garden won

    E-Print Network [OSTI]

    -catching, yet energy efficient, succulent covering of the roof structure attracted much interest. Photosby Efficient Garden for the New Millennium," was designed by Horticulture Manager, David Brunner-circulating water and a shade structure roofed with succulent plants. The East Bay Municipal Utility District

  5. 1066-033X/10/$26.002010IEEE APRIL 2011 IEEE CONTROL SYSTEMS MAGAZINE 63 PHOTO BY HAE-WON PARK AND KOUSHIL SREENATH

    E-Print Network [OSTI]

    Hurst, Jonathan

    efficient [1]. This robot walks with a dimension- less mechanical-transport cost cmt of 0, agility, and energy efficiency. This robot can be thought of as a hybrid of the Planar biped and Rabbit predicts a dimensionless mechanical-transport cost cmt of 0.04, while it is experimen- tally measured

  6. Radiation May Indirectly Impair Growth Resulting in Reduced Standing Height via Subclinical Inflammation in Atomic-Bomb Survivors Exposed at Young Ages

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

    Nakashima, Eiji; Neriishi, Kazuo; Hsu, Wan-Ling

    2015-01-01

    For young atomic-bomb (A-bomb) survivors, A-bomb radiation’s (total) effect on standing height is thought to comprise the sum of direct effect and indirect effect via inflammation. With the data of five inflammatory markers—white blood cell count, sialic acid, corrected erythrocyte sedimentation rate (ESR), ? 1 globulin, and ? 2 globulin—obtained in adulthood during the period 1988 to 1992, a summary inflammatory index was constructed as a surrogate for the five subclinical inflammatory markers. For 3,327 A-bomb survivors exposed at ages of less than 25 years, a structural equation modelmore »was analyzed to measure direct radiation effects on adult height as well as mediating effect of radiation via inflammation on the height after adjustment for other risk factors, smoking, cancer, inflammatory disease, obesity, and diabetes mellitus. The mediation proportion of the radiation effect on height via inflammation was approximately 5% for both sexes for all ages, and indirect dose effects via inflammation were statistically significant for both sexes combined and for females exposed at ages 0 to 5 years. Indirect dose effects for all ages via sialic acid, corrected ESR, and ? 2 globulin were marginally significant for both sexes combined and for females. These proportions are likely underestimated. « less

  7. A SURVEY OF H{sub 2}O, CO{sub 2}, AND CO ICE FEATURES TOWARD BACKGROUND STARS AND LOW-MASS YOUNG STELLAR OBJECTS USING AKARI

    SciTech Connect (OSTI)

    Noble, J. A.; Fraser, H. J.; Aikawa, Y.; Pontoppidan, K. M.; Sakon, I.

    2013-10-01

    We present near-infrared spectroscopic observations of 19 molecular clouds made using the AKARI satellite, and the data reduction pipeline written to analyze those observations. The 2.5-5 ?m spectra of 30 objects—22 field stars behind quiescent molecular clouds and 8 low-mass young stellar objects in cores—were successfully extracted using the pipeline. Those spectra are further analyzed to calculate the column densities of key solid phase molecular species, including H{sub 2}O, CO{sub 2}, CO, and OCN{sup –}. The profile of the H{sub 2}O ice band is seen to vary across the objects observed and we suggest that the extended red wing may be an evolutionary indicator of both dust and ice mantle properties. The observation of 22 spectra with fluxes as low as < 5 mJy toward background stars, including 15 where the column densities of H{sub 2}O, CO, and CO{sub 2} were calculated, provides valuable data that could help to benchmark the initial conditions in star-forming regions prior to the onset of star formation.

  8. Integral Field Spectroscopy of Massive Young Stellar Objects in the N113 H\\,{\\sc ii} Region in the Large Magellanic Cloud

    E-Print Network [OSTI]

    Ward, J L; van Loon, J Th; Sewilo, M

    2015-01-01

    The \\textit{Spitzer} SAGE survey has allowed the identification and analysis of significant samples of Young Stellar Object (YSO) candidates in the Large Magellanic Cloud (LMC). However the angular resolution of \\textit{Spitzer} is relatively poor meaning that at the distance of the LMC, it is likely that many of the \\textit{Spitzer} YSO candidates in fact contain multiple components. We present high resolution \\textit{K}-band integral field spectroscopic observations of the three most prominent massive YSO candidates in the N113 H\\,{\\sc ii} region using VLT/SINFONI. We have identified six \\textit{K}-band continuum sources within the three \\textit{Spitzer} sources and we have mapped the morphology and velocity fields of extended line emission around these sources. Br$\\gamma$, He\\,{\\sc i} and H$_2$ emission is found at the position of all six \\textit{K}-band sources; we discuss whether the emission is associated with the continuum sources or whether it is ambient emission. H$_2$ emission appears to be mostly a...

  9. Early Results from VLT-SPHERE: Long-Slit Spectroscopy of 2MASS 0122-2439B, a Young Companion Near the Deuterium Burning Limit

    E-Print Network [OSTI]

    Hinkley, Sasha; Vigan, Arthur; Aller, Kimberly M; Liu, Michael C; Mawet, Dimitri; Matthews, Elisabeth; Wahhaj, Zahed; Kraus, Stefan; Baraffe, Isabelle; Chabrier, Gilles

    2015-01-01

    We present 0.95-1.80 $\\mu$m spectroscopy of the $\\sim$12-27 $M_{\\rm Jup}$ companion orbiting the faint ($R$$\\sim$13.6), young ($\\sim$120 Myr) M-dwarf 2MASS J01225093--2439505 ("2M0122--2439 B") at 1.5 arcsecond separation (50 AU). Our coronagraphic long-slit spectroscopy was obtained with the new high contrast imaging platform VLT-SPHERE during Science Verification. The unique long-slit capability of SPHERE enables spectral resolution an order of magnitude higher than other extreme AO exoplanet imaging instruments. With a low mass, cool temperature, and very red colors, 2M0122-2439 B occupies a particularly important region of the substellar color-magnitude diagram by bridging the warm directly imaged hot planets with late-M/early-L spectral types (e.g. $\\beta$ Pic b and ROXs 42Bb) and the cooler, dusty objects near the L/T transition (e.g. HR 8799bcde and 2MASS 1207b). We fit BT-Settl atmospheric models to our $R$$\\approx$350 spectrum and find $T_{\\rm eff}$=1600$\\pm$100 K and $\\log(g)$=4.5$\\pm$0.5 dex. Visua...

  10. The molecular emissions and the infall motion in the high-mass young stellar object G8.68-0.37

    E-Print Network [OSTI]

    Ren, Zhiyuan; Zhu, Ming; Liu, Tie; Peng, Ruisheng; Shengli,; Qin,; Li, Lixin

    2012-01-01

    We present a multi-wavelength observational study towards the high-mass young stellar object G8.68-0.37. A single massive gas-and-dust core is observed in the (sub)millimeter continuum and molecular line emissions. We fitted the spectral energy distribution (SED) from the dust continuum emission. The best-fit SED suggests the presence of two components with temperature of $T_{\\rm d}=20$ K and 120 K, respectively. The core has a total mass of up to $1.5\\times10^3$ $M_{\\odot}$ and bolometric luminosity of $2.3\\times10^4 L_{\\odot}$. Both the mass and luminosity are dominated by the cold component ($T_{\\rm d}=20$ K). The molecular lines of C$^{18}$O, C$^{34}$S, DCN, and thermally excited CH$_3$OH are detected in this core. Prominent infall signatures are observed in the $^{12}$CO $(1-0)$ and $(2-1)$. We estimated an infall velocity of 0.45 km s$^{-1}$ and mass infall rate of $7\\times10^{-4} M_{\\odot}$ year$^{-1}$. From the molecular lines, we have found a high DCN abundance and relative abundance ratio to HCN. Th...

  11. The structure of disks around intermediate-mass young stars from mid-infrared interferometry. Evidence for a population of group II disks with gaps

    E-Print Network [OSTI]

    Menu, J; Henning, Th; Leinert, Ch; Waelkens, C; Waters, L B F M

    2015-01-01

    The disks around Herbig Ae/Be stars are commonly divided into group I and group II based on their far-infrared spectral energy distribution, and the common interpretation for that is flared and flat disks. Recent observations suggest that many flaring disks have gaps, whereas flat disks are thought to be gapless. The different groups of objects can be expected to have different structural signatures in high-angular-resolution data. Over the past 10 years, the MIDI instrument on the Very Large Telescope Interferometer has collected observations of several tens of protoplanetary disks. We model the large set of observations with simple geometric models. A population of radiative-transfer models is synthesized for interpreting the mid-infrared signatures. Objects with similar luminosities show very different disk sizes in the mid-infrared. Restricting to the young objects of intermediate mass, we confirm that most group I disks are in agreement with being transitional. We find that several group II objects have ...

  12. A survey for Fe 6.4 keV emission in young stellar objects in rho Oph: the strong fluorescence from Elias 29

    E-Print Network [OSTI]

    Favata, F; Silva, B; Sciortino, S; Tsujimoto, M

    2004-01-01

    We report the results of a search for 6.4 keV Fe fluorescent emission in Young Stellar Objects (YSOs) with measured accretion luminosities in the rho Oph cloud, using all existing chandra and XMM-Newton observations of the region. A total of nine such YSOs have X-ray data with sufficiently high S/N for the 6.4 keV line to be potentially detected if present. A positive detection of the Fe 6.4 keV line is reported for one object, Elias 29, in both the XMM-Newton and the chandra data. The 6.4 keV line is detected in Elias 29 both during quiescent and flaring emission, unlikely all previously reported detections of 6.4 keV Fe fluorescence in YSOs which were made during intense flaring. The observed equivalent width of the fluorescent line is large, at W_alpha approx 140 eV, ruling out fluorescence from diffuse circumstellar material. It is also larger than expected for simple reflection from a solar-composition photosphere or circumstellar disk, but it is compatible with being due to fluorescence from a centrally...

  13. A survey for Fe 6.4 keV emission in young stellar objects in rho Oph: the strong fluorescence from Elias 29

    E-Print Network [OSTI]

    F. Favata; G. Micela; B. Silva; S. Sciortino; M. Tsujimoto

    2004-12-20

    We report the results of a search for 6.4 keV Fe fluorescent emission in Young Stellar Objects (YSOs) with measured accretion luminosities in the rho Oph cloud, using all existing chandra and XMM-Newton observations of the region. A total of nine such YSOs have X-ray data with sufficiently high S/N for the 6.4 keV line to be potentially detected if present. A positive detection of the Fe 6.4 keV line is reported for one object, Elias 29, in both the XMM-Newton and the chandra data. The 6.4 keV line is detected in Elias 29 both during quiescent and flaring emission, unlikely all previously reported detections of 6.4 keV Fe fluorescence in YSOs which were made during intense flaring. The observed equivalent width of the fluorescent line is large, at W_alpha approx 140 eV, ruling out fluorescence from diffuse circumstellar material. It is also larger than expected for simple reflection from a solar-composition photosphere or circumstellar disk, but it is compatible with being due to fluorescence from a centrally illuminated circumstellar disk. The X-ray spectrum of Elias 29 is also peculiar in terms of its high (ionized) Fe abundance, as evident from the very intense Fe xxv 6.7 keV line emission; we speculate on the possible mechanism leading to the observed high abundance.

  14. DEEP X-RAY OBSERVATIONS OF THE YOUNG HIGH-MAGNETIC-FIELD RADIO PULSAR J1119-6127 AND SUPERNOVA REMNANT G292.2-0.5

    SciTech Connect (OSTI)

    Ng, C.-Y.; Kaspi, V. M. [Department of Physics, McGill University, Montreal, QC H3A 2T8 (Canada); Ho, W. C. G. [School of Mathematics, University of Southampton, Southampton SO17 1BJ (United Kingdom); Weltevrede, P. [Jodrell Bank Centre for Astrophysics, University of Manchester, Alan Turing Building, Manchester M13 9PL (United Kingdom); Bogdanov, S. [Columbia Astrophysics Laboratory, Columbia University, 550 West 120th Street, New York, NY 10027 (United States); Shannon, R. [CSIRO Astronomy and Space Sciences, Australia Telescope National Facility, Marsfield, NSW 2210 (Australia); Gonzalez, M. E., E-mail: ncy@physics.mcgill.ca [Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1 (Canada)

    2012-12-10

    High-magnetic-field radio pulsars are important transition objects for understanding the connection between magnetars and conventional radio pulsars. We present a detailed study of the young radio pulsar J1119-6127, which has a characteristic age of 1900 yr and a spin-down-inferred magnetic field of 4.1 Multiplication-Sign 10{sup 13} G, and its associated supernova remnant G292.2-0.5, using deep XMM-Newton and Chandra X-ray Observatory exposures of over 120 ks from each telescope. The pulsar emission shows strong modulation below 2.5 keV with a single-peaked profile and a large pulsed fraction of 0.48 {+-} 0.12. Employing a magnetic, partially ionized hydrogen atmosphere model, we find that the observed pulse profile can be produced by a single hot spot of temperature 0.13 keV covering about one-third of the stellar surface, and we place an upper limit of 0.08 keV for an antipodal hot spot with the same area. The non-uniform surface temperature distribution could be the result of anisotropic heat conduction under a strong magnetic field, and a single-peaked profile seems common among high-B radio pulsars. For the associated remnant G292.2-0.5, its large diameter could be attributed to fast expansion in a low-density wind cavity, likely formed by a Wolf-Rayet progenitor, similar to two other high-B radio pulsars.

  15. LOW-VELOCITY SHOCKS TRACED BY EXTENDED SiO EMISSION ALONG THE W43 RIDGES: WITNESSING THE FORMATION OF YOUNG MASSIVE CLUSTERS

    SciTech Connect (OSTI)

    Nguyen-Luong, Q.; Martin, P. G.; Motte, F.; Louvet, F.; Hill, T.; Hennemann, M.; Didelon, P.; Lesaffre, P.; Gusdorf, A.; Menten, K. M.; Wyrowski, F.; Bendo, G.; Roussel, H.; Bernard, J.-P.; Bronfman, L.; and others

    2013-10-01

    The formation of high-mass stars is tightly linked to that of their parental clouds. Here, we focus on the high-density parts of W43, a molecular cloud undergoing an efficient event of star formation. Using a column density image derived from Herschel continuum maps, we identify two high-density filamentary clouds, called the W43-MM1 and W43-MM2 ridges. Both have gas masses of 2.1 × 10{sup 4} M{sub ?} and 3.5 × 10{sup 4} M{sub ?} above >10{sup 23} cm{sup -2} and within areas of ?6 and ?14 pc{sup 2}, respectively. The W43-MM1 and W43-MM2 ridges are structures that are coherent in velocity and gravitationally bound, despite their large velocity dispersion measured by the N{sub 2}H{sup +} (1-0) lines of the W43-HERO IRAM large program. Another intriguing result is that these ridges harbor widespread (?10 pc{sup 2}) bright SiO (2-1) emission, which we interpret to be the result of low-velocity shocks (?10 km s{sup –1}). We measure a significant relationship between the SiO (2-1) luminosity and velocity extent and show that it distinguishes our observations from the high-velocity shocks associated with outflows. We use state-of-the-art shock models to demonstrate that a small percentage (10%) of Si atoms in low-velocity shocks, observed initially in gas phase or in grain mantles, can explain the observed SiO column density in the W43 ridges. The spatial and velocity overlaps between the ridges of high-density gas and the shocked SiO gas suggest that ridges could be forming via colliding flows driven by gravity and accompanied by low-velocity shocks. This mechanism may be the initial conditions for the formation of young massive clusters.

  16. Play Texts and Public Practice in the Chester Cycle, 1422-1607

    E-Print Network [OSTI]

    Sergi, Matthew John

    2011-01-01

    and fetch anon to mee / an asse and a foale alsoe (linesHow, how! I must have this asse. JANITOR Here thou gettestwon Luce won Camell, won Asse, won dragon, sixe hobby

  17. MIKE TURNER ON SPOTTING YOUNG

    E-Print Network [OSTI]

    REVIEW: PAGE 18 How carbon emissions trading can work in the aviation industry MY THEORY: PAGE 19 Peter

  18. Diagnostics for Kenneth M. Young

    E-Print Network [OSTI]

    and Heating #12;The FIRE Divertor #12;Key Nuclear Radiation Data Radiation dose at inboard magnet Biological Loading and Radiation Dose at Different Poloidal Locations outside Vacuum Vessel M.E. Sawan and H ­ Aspect ratio ~ 3.8 ­ low ripple 0.34% · The minimum size (cost) device is being sought, therefore

  19. IWA Balkan Young Water Professionals

    E-Print Network [OSTI]

    Psarrakos, Panayiotis

    Networks Industrial Waste Treatment and Disposal River Basins Management Legislation in the Water those associated with cross-border water management issues, which require experience exchange among 2015 - Thessaloniki, Greece Topics Water Management (Water Loss ­ Mitigation Methods and Technologies

  20. IEEE Builds Better Young Professionals

    E-Print Network [OSTI]

    of Honor 2013 Co-founder, Qualcomm, Inc. B. Jayant Baliga IEEE Medal of Honor 2013 Transformed Power;RENEWABLE ENERGY How we've grown: IEEE covers all areas of technology SMART GRID AEROSPACECOMMUNICATIONS agencies · Communications and energy labs · Patent offices and scientific councils · Government R&D centers

  1. WINTER 2012 ANDREW YOUNG SCHOOL

    E-Print Network [OSTI]

    Frantz, Kyle J.

    of the Dean publishes The Briefing three times a year for alumni, friends, faculty and staff of the Andrew Walker Dean Robert E. Moore Associate Dean Cynthia Searcy Assistant Dean for Academic Programs Avani

  2. CHRISTIE PABARUE MORTENSEN AND 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L OBransenBusinessInitialRadiological Surveys at

  3. CHRISTIE PABARUE MORTENSEN AND 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B L OBransenBusinessInitialRadiological Surveys at - -, CHRISTIE

  4. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass map shines light on771/6/14 Contact:NewsWebmasterWorkingEllaKrueger

  5. Microsoft Word - young_abstract

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 Outreach Home Room NewsInformationJessework uses concrete7 Assessment ofLana7, at 3:00Theory Seminar

  6. Planck cold clumps in the $\\lambda$ Orionis complex: I. Discovery of an extremely young Class 0 protostellar object and a proto-brown dwarf candidate in a bright rimmed clump PGCC G192.32-11.88

    E-Print Network [OSTI]

    Liu, Tie; Kim, Kee-Tae; Wu, Yuefang; Lee, Chang Won; Lee, Jeong-Eun; Tatematsu, Kenichi; Choi, Minho; Juvela, Mika; Thompson, Mark; Goldsmith, Paul F; Liu, Sheng-yuan; Naomi, Hirano; Koch, Patrick; Henkel, Christian; Sanhueza, Patricio; He, JinHua; Rivera-Ingraham, Alana; Wang, Ke; Cunningham, Maria R; Tang, Ya-Wen; Lai, Shih-Ping; Yuan, Jinghua; Li, Di; Fuller, Gary; Kang, Miju; Luong, Quang Nguyen; Liu, Hauyu Baobab; Ristorcelli, Isabelle; Yang, Ji; Xu, Ye; Hirota, Tomoya; Mardones, Diego; Qin, Sheng-Li; Chen, Huei-Ru; Kwon, Woojin; Meng, FanYi; Zhang, Huawei; Kim, Mi-Ryang; Yi, Hee-Weon

    2015-01-01

    We are performing a series of observations with ground-based telescopes toward Planck Galactic cold clumps (PGCCs) in the $\\lambda$ Orionis complex in order to systematically investigate the effects of stellar feedback. In the particular case of PGCC G192.32-11.88, we discovered an extremely young Class 0 protostellar object (G192N) and a proto-brown dwarf candidate (G192S). G192N and G192S are located in a gravitationally bound bright-rimmed clump. The velocity and temperature gradients seen in line emission of CO isotopologues indicate that PGCC G192.32-11.88 is externally heated and compressed. G192N probably has the lowest bolometric luminosity ($\\sim0.8$ L$_{\\sun}$) and accretion rate (6.3$\\times10^{-7}$ M$_{\\sun}$~yr$^{-1}$) when compared with other young Class 0 sources (e.g. PACS Bright Red sources (PBRs)) in the Orion complex. It has slightly larger internal luminosity ($0.21\\pm0.01$ L$_{\\sun}$) and outflow velocity ($\\sim$14 km~s$^{-1}$) than the predictions of first hydrostatic cores (FHSCs). G192N...

  7. MARKER-AUGMENTED ROBOT-ENVIRONMENT INTERACTION

    E-Print Network [OSTI]

    Mali, Amol D.

    MARKER-AUGMENTED ROBOT-ENVIRONMENT INTERACTION Amol Dattatraya Mali Electrical Engg. & Computer Science University of Wisconsin, Milwaukee, WI 53211 mali@miller.cs.uwm.edu Abstract There has been

  8. MARKERAUGMENTED ROBOTENVIRONMENT INTERACTION

    E-Print Network [OSTI]

    Mali, Amol D.

    MARKER­AUGMENTED ROBOT­ENVIRONMENT INTERACTION Amol Dattatraya Mali Electrical Engg. & Computer Science University of Wisconsin, Milwaukee, WI 53211 mali@miller.cs.uwm.edu Abstract There has been

  9. Plan Merging & Plan Reuse As Satis ability

    E-Print Network [OSTI]

    Mali, Amol D.

    Plan Merging & Plan Reuse As Satis#12;ability #3; Amol Dattatraya Mali Dept. of Elect. Engg. & Computer Science, P.O.Box 784 University of Wisconsin, Milwaukee, WI 53201, USA mali@miller.cs.uwm.edu July

  10. Manufacturers of light sensitive devices need to measure the

    E-Print Network [OSTI]

    Langendoen, Koen

    of light sensitive devices. The Solar cells testing system has won the Dutch Cleantech Challenge 2014

  11. Political Support in Advanced Industrial Democracie

    E-Print Network [OSTI]

    Dalton, Russell J.

    1998-01-01

    Dalton 1993). In Germany, for example, local citizen action groups have won changes in administrative law

  12. Detection of electrically formed photosensitive area in Ca-doped BiFeO3 K. Kamala Bharathi, Won-Mo Lee, Ji Ho Sung, Ji Soo Lim, Seung Jin Kim et al.

    E-Print Network [OSTI]

    Jo, Moon-Ho

    ; accepted 20 December 2012; published online 10 January 2013) We report on the visualization of n-p junctions formed by oxygen vacancy movement under the application of an electric field in a Ca-doped BiFeO3

  13. Forever Young: Aging Control In DTNs

    E-Print Network [OSTI]

    Altman, Eitan; Menasche, Daniel Sadoc; Xu, Yuedong

    2010-01-01

    The demand for Internet services that require frequent updates through small messages, also known as microblogging, has tremendously grown in the past few years. Although the use of such applications by domestic users is usually free, their access from mobile devices is subject to fees and consumes energy from limited batteries. If a user activates his mobile device and is in range of a service provider, a content update is received at the expense of monetary and energy costs. Thus, users face a tradeoff between such costs and their messages aging. The goal of this paper is to show how to cope with such a tradeoff, by devising \\emph{aging control policies}. An aging control policy consists of deciding, based on the current utility of the last message received, whether to activate the mobile device, and if so, which technology to use (WiFi or 3G). We present a model that yields the optimal aging control policy. Our model is based on a Markov Decision Process in which states correspond to message ages. Using ou...

  14. Curriculum Vitae Young-Hee Ryu

    E-Print Network [OSTI]

    Bou-Zeid, Elie

    , and J.-J. Baik, 2013: Characteristics of the urban heat island in a high-altitude metropolitan city to urban heat island intensity. Journal of Applied Meteorology and Climatology, 51, 842-854. [link] 7. Kwak Publications 17. Ryu, Y.-H., J.-J. Baik, and S.-H. Lee, 2013: Effects of anthropogenic heat on ozone air

  15. Infrared Imaging with COAST John Stephen Young

    E-Print Network [OSTI]

    Young, John

    in the passive voice, and the only one which might make you smile. Above all, I would like to thank my supervisor-time housemates Matt, Emma (honorary housemate), Tim, Steve, and Anna. I also want to thank Dave, Pip and Fred

  16. NOTE / NOTE Allometric equations for young northern

    E-Print Network [OSTI]

    Battles, John

    . Vadeboncoeur, Mary A. Arthur, Russell D. Briggs, and Carrie R. Levine Abstract: Estimates of aboveground-specific equations for estimating aboveground biomass Farrah R. Fatemi, Ruth D. Yanai, Steven P. Hamburg, Matthew A relationships. Despite the widespread use of this approach, there is little information about whether equations

  17. QER- Comment of Allen Young 2

    Broader source: Energy.gov [DOE]

    Here is a comment from me on the issue of energy infrastructure in Massachusetts. I will address only one issue: the proposed Kinder Morgan pipelines from Albany to Dracut. I am absolutely opposed to the construction of this pipeline and here are my reasons

  18. EFFECTS OF SOUND WAVES ON YOUNG SALMON

    E-Print Network [OSTI]

    percent. Hamilton and Andrew (1954) estimated survival rates at Baker Dam at between 36.5 and 71.7 per scope, intended to aid or direct management or utilization practices and as guides for administrative Figure 2. Piezo-electric Transducer 4 Figure 3 . Experimental Tank 5 Figure 4. Tank Covers Showing

  19. Jared W. Young, CV. CURRICULUM VITAE

    E-Print Network [OSTI]

    Squire, Larry R.

    of Paisley. AWARDS AND HONORS 2014: Awarded Fellow status in the International Behavioral Neuroscience

  20. Tangible Programming Elements for Young Children

    E-Print Network [OSTI]

    Wyeth, P.A.; Purchase, H.C.

    Wyeth,P.A. Purchase,H.C. Proceedings of the CHI conference. Comstock,B.,Sasse,M.A.(eds) pp 774-775 ACM