Sample records for reviews mergers acquisitions

  1. The IT integration of mergers & acquisitions

    E-Print Network [OSTI]

    Zhao, Jun, S.M. Massachusetts Institute of Technology

    2006-01-01T23:59:59.000Z

    The role of information systems in mergers and acquisitions (M&A) becomes increasingly important as the need for speed of reaction and information is growing. Mergers and acquisitions may disrupt the operations of the ...

  2. Mergers and acquisitions in the U.S. Electric Industry: State regulatory policies for reviewing today's deals

    SciTech Connect (OSTI)

    Peterson, Carl R.; McDermott, Karl A.

    2007-01-15T23:59:59.000Z

    Regulators will continue to view mergers through the lens of regulation. However, their standards must be understood in the context of the new market and the proper role of regulators, and their tools should be fashioned accordingly. (author)

  3. Mergers and acquisitions in the medical device industry

    E-Print Network [OSTI]

    Ohashi, Kevin Lee

    2007-01-01T23:59:59.000Z

    Mergers and acquisitions in the Medical Device Industry are the primary mode of exit for early stage companies. The focus of this thesis is to examine factors which influence the value of these M&A transactions from the ...

  4. Aerospace mergers and acquisitions from a lean enterprise perspective

    E-Print Network [OSTI]

    Kim, Junhong, 1974-

    2004-01-01T23:59:59.000Z

    In the past twenty years, companies in the aerospace industry experienced major transitions: mergers and acquisitions, and lean transformation initiatives. This thesis presents research about the relation of lean efforts ...

  5. The role of product management in the success of mergers and acquisitions : analyzing Eaton's 2008 Phoenixtec Power Company Ltd. acquisition

    E-Print Network [OSTI]

    Ren, Lijuan, S.M. Massachusetts Institute of Technology

    2013-01-01T23:59:59.000Z

    Mergers and acquisitions are important ways for multinational companies to expand and grow their business. This thesis studies the role of product management in the success of mergers and acquisitions by analyzing Eaton's ...

  6. Downstream Petroleum Mergers and Acquisitions by U.S. Major Oil Companies

    Reports and Publications (EIA)

    2009-01-01T23:59:59.000Z

    A summary presentation of mergers and acquisitions by U.S. major oil companies (including the U.S. affiliates of foreign major oil companies). The presentation focuses on petroleum refining over the last several years through late 2009.

  7. Tax consequences of a merger or acquisition of or by a subchapter S corporation 

    E-Print Network [OSTI]

    Sanchez, Roxana Maria

    1976-01-01T23:59:59.000Z

    TAX CONSEQUENCES OF A MERGER OR ACQUISITION OF OR BY A SUBCHAPTER S CORPORATION A Thesis by ROXANA MARIA SANCHEc Submitted to the Graduate College of Texas AacM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1976 Major Subject: Accounting TAX CONSEQUENCES OF A MERGER OR ACQUISITION OF OR BY A SUBCHAPTER S CORPORATION A Thesis by ROXANA MARIA SANCHEZ Approved as to style and content by: Chairman of' Committee) (Head of' Department) ggn...

  8. Tax consequences of a merger or acquisition of or by a subchapter S corporation

    E-Print Network [OSTI]

    Sanchez, Roxana Maria

    1976-01-01T23:59:59.000Z

    TAX CONSEQUENCES OF A MERGER OR ACQUISITION OF OR BY A SUBCHAPTER S CORPORATION A Thesis by ROXANA MARIA SANCHEc Submitted to the Graduate College of Texas AacM University in partial fulfillment of the requirement for the degree of MASTER... OF SCIENCE May 1976 Major Subject: Accounting TAX CONSEQUENCES OF A MERGER OR ACQUISITION OF OR BY A SUBCHAPTER S CORPORATION A Thesis by ROXANA MARIA SANCHEZ Approved as to style and content by: Chairman of' Committee) (Head of' Department) ggn...

  9. Mergers and acquisitions process improvement in a matrix organization

    E-Print Network [OSTI]

    Cavazos Cavazos, Jose Juan

    2012-01-01T23:59:59.000Z

    3M has had aggressive growth through acquisitions. Almost all of the acquisitions add new manufacturing sites to the existing manufacturing and distribution networks. 3M is composed of 38 divisions (as of 2011) with ...

  10. Institutions and Cross-border Mergers and Acquisitions (M&A) Value Creation 

    E-Print Network [OSTI]

    Zhu, Hong

    2012-02-14T23:59:59.000Z

    Cross-border Merger and Acquisitions (M&As) are an increasingly important strategy adopted by firms in order to create value in fiercely competitive global markets. Cross-border M&A value creation, that is, wealth creation for shareholders from...

  11. Review of Supervisory Control and Data Acquisition (SCADA) Systems

    SciTech Connect (OSTI)

    Reva Nickelson; Briam Johnson; Ken Barnes

    2004-01-01T23:59:59.000Z

    A review using open source information was performed to obtain data related to Supervisory Control and Data Acquisition (SCADA) systems used to supervise and control domestic electric power generation, transmission, and distribution. This report provides the technical details for the types of systems used, system disposal, cyber and physical security measures, network connections, and a gap analysis of SCADA security holes.

  12. Aspects of Apache's Acquisition of Mariner Energy and Selected Devon Energy Assets

    Reports and Publications (EIA)

    2010-01-01T23:59:59.000Z

    The Energy Information Administration reviews mergers, acquisitions, and alliances by companies that are respondents to Form EIA-28 (Financial Reporting System (FRS)), or that result in a company that meets the FRS reporting criteria.

  13. Galaxy Mergers and Interactions at High Redshift

    E-Print Network [OSTI]

    Christopher J. Conselice

    2006-11-04T23:59:59.000Z

    In this review we discuss the evidence for galaxy interactions and mergers in the distant universe and the role of mergers in forming galaxies. Observations show that the fraction of massive (M> M_*) galaxies involved in major mergers is roughly 5-10% at z~1. The merger fraction however increases steeply for the most massive galaxies up to z~3, where the merger fraction is 50+/-20%. Using N-body models of the galaxy merger process at a variety of merger conditions, merger mass ratios, and viewing angles this merger fraction can be converted into a merger rate, and mass accretion rate due to mergers. A simple integration of the merger rate shows that a typical massive galaxy at z~3 will undergo 4-5 major mergers between z~3 and z~0, with most of this activity, and resulting mass assembly, occurring at z > 1.5.

  14. acquisition board review: Topics by E-print Network

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

    C:orporate acquisitions have important economic and political consequences. When one corporation acquires another, it often replaces the acquired firm's top managers with its...

  15. acquisition healthy subjects: Topics by E-print Network

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

    2004-09-30 85 Tax consequences of a merger or acquisition of or by a subchapter S corporation Texas A&M University - TxSpace Summary: TAX CONSEQUENCES OF A MERGER OR ACQUISITION...

  16. acquisition systematic review: Topics by E-print Network

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

    Cochrane Library 2010, Issue 10 (see unknown authors 2010-01-01 76 Association Between Gout and All-Cause as well as Cardiovascular Mortality: A Systematic Review CiteSeer...

  17. Air Impacts of Increased Natural Gas Acquisition, Processing, and Use: A Critical Review

    E-Print Network [OSTI]

    Jackson, Robert B.

    Air Impacts of Increased Natural Gas Acquisition, Processing, and Use: A Critical Review to rapid and intensive development of many unconventional natural gas plays (e.g., shale gas, tight sand understanding of local and regional air quality impacts of natural gas extraction, production, and use. Air

  18. A review of breast tomosynthesis. Part I. The image acquisition process

    SciTech Connect (OSTI)

    Sechopoulos, Ioannis [Department of Radiology and Imaging Sciences, Hematology and Medical Oncology and Winship Cancer Institute, Emory University, 1701 Upper Gate Drive Northeast, Suite 5018, Atlanta, Georgia 30322 (United States)

    2013-01-15T23:59:59.000Z

    Mammography is a very well-established imaging modality for the early detection and diagnosis of breast cancer. However, since the introduction of digital imaging to the realm of radiology, more advanced, and especially tomographic imaging methods have been made possible. One of these methods, breast tomosynthesis, has finally been introduced to the clinic for routine everyday use, with potential to in the future replace mammography for screening for breast cancer. In this two part paper, the extensive research performed during the development of breast tomosynthesis is reviewed, with a focus on the research addressing the medical physics aspects of this imaging modality. This first paper will review the research performed on the issues relevant to the image acquisition process, including system design, optimization of geometry and technique, x-ray scatter, and radiation dose. The companion to this paper will review all other aspects of breast tomosynthesis imaging, including the reconstruction process.

  19. Compact binary mergers: an astrophysical perspective

    E-Print Network [OSTI]

    S. Rosswog

    2010-12-22T23:59:59.000Z

    This paper reviews the current understanding of double neutron star and neutron star black hole binaries. It addresses mainly (nuclear) astrophysics aspects of compact binary mergers and thus complements recent reviews that have emphasized the numerical relativity viewpoint. In particular, the paper discusses different channels to release neutron-rich matter into the host galaxy, connections between compact binary mergers and short Gamma-ray bursts and accompanying electromagnetic signals.

  20. Acquisition Reform

    E-Print Network [OSTI]

    Sapolsky, Harvey

    This report reviews the six most recent major acquisition reform reports, starting in 1949 with the Hoover Commissions and including McNamara's Total Package Procurement, Fitzhugh Commission, the Commission on Government ...

  1. Acquisition Guide --------------------?

    Office of Environmental Management (EM)

    or services not exceeding the simplified acquisition threshold SAT." Acquisition reform, including SAP, resulted from the following legislation: Federal Acquisition...

  2. The CEO-merger connection : a top leadership perspective on large intercorporate combinations

    E-Print Network [OSTI]

    Park, Kathleen Marshall

    2005-01-01T23:59:59.000Z

    To better understand large mergers and acquisitions (M&A) as major intercorporate strategic maneuvers, I study a key concern from the chief executive perspective at each stage of combining two firms. For the inception ...

  3. ACQUISITION PLANNING

    Office of Environmental Management (EM)

    7.1 (May 2010) 1 ACQUISITION PLANNING REFERENCES 1. FAR 4.803(a)(1) Contents of Contract Files 2. FAR 5.405(a) Exchange of Acquisition Information 3. FAR Part 7 Acquisition...

  4. Acquisition Guide

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

    Guiding Principles Timely acquisition planning is critical Effective oversight control systems are essential to ensuring the high qualityintegrity of procurement...

  5. Merger Driven Explosive Evolution of Distant Galaxies (Minor Mergers)

    E-Print Network [OSTI]

    Kats, A V

    2013-01-01T23:59:59.000Z

    We derived solutions for the Smoluchowski kinetic equation for the mass function of galaxies, which describes mergers in differential approximation, where mergers with low-mass galaxies are the dominant factor. The evolution of the initial distribution is analyzed as well as the influence of the source represented by galaxies (halos) that separate from the global cosmological expansion. It is shown that the evolution of the slope of the power-law part of the luminosity function at a constant mass-to-luminosity ratio observed in the Ultra Deep Hubble Field can be described as a result of explosive evolution driven by galaxy mergers. In this case the exponent depends exclusively on the uniformity degree of merger probability as a function of mass.

  6. ACQUISITION PLANNING

    Energy Savers [EERE]

    as required by these agreements. Utility Services Prior to executing a utility service contract, the contracting officer shall conduct market surveys and perform acquisition...

  7. AT&T Consulting Security Services for Mergers and Acquisitions

    E-Print Network [OSTI]

    Fisher, Kathleen

    . This presents an increasing risk for the security of personally identifiable information entrusted the combined strengths and create a larger economic value. While doing so, overlooking information security Espionage · Misuse of Information · Theft, Fraud Security in the M&A Process Information Security needs

  8. Deal Initiation in Mergers and Acquisitions Ronald W. Masulis

    E-Print Network [OSTI]

    Lin, Xiaodong

    . The paper has benefited from comments from Evrim Akdogu, Nihat Aktas, Jarrad Harford, Mark Humphery

  9. Essays on Merger Simulation in Industrial Organization

    E-Print Network [OSTI]

    Kim, Mee Yeon

    2012-01-01T23:59:59.000Z

    mergers as Coke and Dr. Pepper (rejected), Pepsi and 7–Up (withdrawn), and Coke and Pepsi (hypothetical). Nevo (2000)

  10. Merger Rates of Dark-Matter Haloes

    E-Print Network [OSTI]

    Eyal Neistein; Avishai Dekel

    2008-05-22T23:59:59.000Z

    We derive analytic merger rates for dark-matter haloes within the framework of the Extended Press-Schechter (EPS) formalism. These rates become self-consistent within EPS once we realize that the typical merger in the limit of a small time-step involves more than two progenitors, contrary to the assumption of binary mergers adopted in earlier studies. We present a general method for computing merger rates that span the range of solutions permitted by the EPS conditional mass function, and focus on a specific solution that attempts to match the merger rates in N-body simulations. The corrected EPS merger rates are more accurate than the earlier estimates of Lacey & Cole, by ~20% for major mergers and by up to a factor of ~3 for minor mergers of mass ratio 1:10^4. Based on the revised merger rates, we provide a new algorithm for constructing Monte-Carlo EPS merger trees, that could be useful in Semi-Analytic Modeling. We provide analytic expressions and plot numerical results for several quantities that are very useful in studies of galaxy formation. This includes (a) the rate of mergers of a given mass ratio per given final halo, (b) the fraction of mass added by mergers to a halo, and (c) the rate of mergers per given main progenitor. The creation and destruction rates of haloes serve for a self-consistency check. Our method for computing merger rates can be applied to conditional mass functions beyond EPS, such as those obtained by the ellipsoidal collapse model or extracted from $N$-body simulations.

  11. White dwarf mergers,White dwarf mergers, thermonuclear supernovae,thermonuclear supernovae,

    E-Print Network [OSTI]

    Hinton, Jim

    White dwarf mergers,White dwarf mergers, thermonuclear supernovae,thermonuclear supernovae fusion is ignited. Degenerate, hence runaway. #12;CO white dwarf accretes, either from companion, or from disk after merger. As it approaches maximum mass, C fusion is ignited. Degenerate, hence runaway. SN Ia

  12. Dynamical consequences of CDM merger trees

    E-Print Network [OSTI]

    Xavier Hernandez; William H. Lee

    2003-10-27T23:59:59.000Z

    Within the context of the standard structure formation scenario, massive present day elliptical galaxies are sometimes thought of as the result of a major merger of spiral systems. Through extensive SPH simulations of merging spirals, we have explored these processes with the aim of quantifying their relaxation times. This is important, as it sets a minimum time interval between the onset of a merger, and the appearance of an elliptical galaxy. We then compare this constraint with predictions of the hierarchical scenario, computed through Press-Schechter merger trees. We find evidence for elliptical systems which appear not to have been formed by a major merger of spirals.

  13. ACQUISITION PLANNING

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of Energy-Chapter 7.1 (May 2012) 2 ACQUISITION

  14. Acquisition Guide

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0 March.4

  15. Acquisition Guide

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0 March.4 3.2

  16. Acquisition Guide

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0 March.4

  17. Acquisition Guide

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0

  18. Acquisition News

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,

  19. Acquisition Guide

    Energy Savers [EERE]

    the beginning of the process. Completed documents (e.g, technical evaluation of cost, audit reports, etc.) should be submitted as they become available. d. Package Review in 3-5...

  20. DOE Acquisition Workforce News Acquiring Minds Want to Know

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

    and Project Management SEPTEMBER 2012 Procurement Management Review Program 2 DOENNSA Acquisition Workshop 3 Recently Certified FPDs 3 PMCDP Course Schedule 4 Questions of...

  1. A Behavioral Theory of the Merger Dynamics of the post-merger integration process

    E-Print Network [OSTI]

    , organization performance, organizational culture, computer simulation, computational organization theory #12. This study employs computational organization theory (COT) techniques, such as agent-based modelingA Behavioral Theory of the Merger Dynamics of the post-merger integration process Terrill L. Frantz

  2. Electricity Merger Policy in the Shadow of Regulation

    E-Print Network [OSTI]

    Gilbert, Richard J; Newberry, David M

    2006-01-01T23:59:59.000Z

    power, exemplified by the E.On- Ruhrgas merger. The form ofthe countries) were the E.On-Ruhrgas merger in 2002, 27 andbid was apparently trumped by E.On in May 2006 (and on this

  3. Quasiuniversal properties of neutron star mergers

    E-Print Network [OSTI]

    Sebastiano Bernuzzi; Alessandro Nagar; Simone Balmelli; Tim Dietrich; Maximiliano Ujevic

    2014-06-06T23:59:59.000Z

    Binary neutron star mergers are studied using nonlinear 3+1 numerical relativity simulations and the analytical effective-one-body (EOB) model. The EOB model predicts quasiuniversal relations between the mass-rescaled gravitational wave frequency and the binding energy at the moment of merger, and certain dimensionless binary tidal coupling constants depending on the stars Love numbers, compactnesses and the binary mass ratio. These relations are quasiuniversal in the sense that, for a given value of the tidal coupling constant, they depend significantly neither on the equation of state nor on the mass ratio, though they do depend on stars spins. The spin dependence is approximately linear for small spins aligned with the orbital angular momentum. The quasiuniversality is a property of the conservative dynamics; nontrivial relations emerge as the binary interaction becomes tidally dominated. This analytical prediction is qualitatively consistent with new, multi-orbit numerical relativity results for the relevant case of equal-mass irrotational binaries. Universal relations are thus expected to characterize neutron star mergers dynamics. In the context of gravitational wave astronomy, these universal relations may be used to constrain the neutron star equation of state using waveforms that model the merger accurately.

  4. Life Extinction Due To Neutron Star Mergers

    E-Print Network [OSTI]

    Arnon Dar; Ari Laor; Nir J. Shaviv

    1996-11-24T23:59:59.000Z

    Cosmic ray bursts (CRBs) from mergers or accretion induced collapse of neutron stars that hit an Earth-like planet closer than $\\sim 1 kpc$ from the explosion produce lethal fluxes of atmospheric muons at ground level, underground and underwater. These CRBs also destroy the ozone layer and radioactivate the environment. The mean rate of such life devastating CRBs is one in 100 million years (Myr), consistent with the observed 5 ``great'' extinctions in the past 600 Myr. Unlike the previously suggested extraterrestrial extinction mechanisms the CRBs explain massive life extinction on the ground, underground and underwater and the higher survival levels of radiation resistant species and of terrain sheltered species. More distant mergers can cause smaller extinctions. Biological mutations caused by ionizing radiation produced by the CRB may explain a fast appearance of new species after mass extinctions. The CRB extinction predicts detectable enrichment of rock layers which formed during the extinction periods with cosmogenically produced radioactive nucleides such as $^{129}$I, $^{146}$Sm, $^{205}$Pb with and $^{244}$Pu. Tracks of high energy particles in rock layers on Earth and on the moon may also contain records of intense CRBs. An early warning of future extinctions due to neutron star mergers can be obtained by identifying, mapping and timing all the nearby binary neutron stars systems. A final warning of an approaching CRB from a nearby neutron stars merger will be provided by a gamma ray burst a few days before the arrival of the CRB.

  5. Data Acquisition Interpretation

    E-Print Network [OSTI]

    Oldenburg, Douglas W.

    Data Acquisition Inversion Interpretation Discussion Virgin River DCIP Report Justin Granek1 1 Report #12;Data Acquisition Inversion Interpretation Discussion Outline 1 Data Acquisition Location Survey Specications 2 Inversion Data Errors DCIP2D DCIP3D 3 Interpretation Correlations Snowbird Tectonic

  6. THE POPULATION OF HELIUM-MERGER PROGENITORS: OBSERVATIONAL PREDICTIONS

    SciTech Connect (OSTI)

    Fryer, Chris L. [CCS Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States)] [CCS Division, Los Alamos National Laboratory, Los Alamos, NM 87545 (United States); Belczynski, Krzysztof; Bulik, Tomasz [Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warsaw (Poland)] [Astronomical Observatory, University of Warsaw, Al. Ujazdowskie 4, 00-478 Warsaw (Poland); Berger, Edo [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)] [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States); Thoene, Christina [IAA-CSIC, Glorieta de la Astronomia s/n, E-18008 Granada (Spain)] [IAA-CSIC, Glorieta de la Astronomia s/n, E-18008 Granada (Spain); Ellinger, Carola [Department of Physics, University of Texas at Arlington, 502 Yates Street, Box 19059, Arlington, TX 76019 (United States)] [Department of Physics, University of Texas at Arlington, 502 Yates Street, Box 19059, Arlington, TX 76019 (United States)

    2013-02-20T23:59:59.000Z

    The helium-merger gamma-ray burst (GRB) progenitor is produced by the rapid accretion onto a compact remnant (neutron star or black hole) when it undergoes a common envelope inspiral with its companion's helium core. This merger phase produces a very distinct environment around these outbursts and recent observations suggest that, in some cases, we are detecting the signatures of the past merger in the GRB afterglow. These observations allow us, for the first time, to study the specific features of the helium-merger progenitor. In this paper, we couple population synthesis calculations to our current understanding of GRB engines and common envelope evolution to make observational predictions for the helium-merger GRB population. Many mergers do not produce GRB outbursts and we discuss the implications of these mergers with the broader population of astrophysical transients.

  7. Star Formation in Mergers and Interacting Galaxies: Gathering the Fuel

    E-Print Network [OSTI]

    Curtis Struck

    2006-10-06T23:59:59.000Z

    Selected results from recent studies of star formation in galaxies at different stages of interaction are reviewed. Recent results from the Spitzer Space Telescope are highlighted. Ideas on how large-scale driving of star formation in interacting galaxies might mesh with our understanding of star formation in isolated galaxies and small scale mechanisms within galaxies are considered. In particular, there is evidence that on small scales star formation is determined by the same thermal and turbulent processes in cool compressed clouds as in isolated galaxies. If so, this affirms the notion that the primary role of large-scale dynamics is to gather and compress the gas fuel. In gas-rich interactions this is generally done with increasing efficiency through the merger process.

  8. Acquisition Career Development Program

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

    2004-04-19T23:59:59.000Z

    This Order establishes training and certification requirements and career development programs under the Acquisition Career Development (ACD) Program for DOE and NNSA acquisition workforce. The acquisition workforce includes contracting, purchasing, personal property management, program management, Contracting Officers and Contracting Officer Representatives. The ACD Program implements the Office of Federal Procurement Policy (OFPP) requirements, Federal Acquisition Regulation (FAR) requirements, Federal Acquisition Reform Act (FARA) requirements, and the objectives of Executive Order (E.O.) 129231, Federal Procurement Reform, dated 10-13-1994. This order cancels DOE O 361.1, Acquisition Career Development Program, dated 11-10-99, AND Acquisition Letter 2003-05, Personal Property Management Career Development, Training, and Certification Program, dated 9-10-03. Cancels DOE O 361.1 Chg 2. Canceled by DOE O 361.1B.

  9. Acquisition Career Development Program

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

    1999-11-10T23:59:59.000Z

    The Order implements the Department's Acquisition Career Development program, mandatory for professionals in the GS-1102 and 1105 occupational procurement series, as well as others with significant procurement responsibilities. The Order also ensures that members of the acquisition workforce are aware of and adhere to the mandatory training and certification requirements. Cancels Acquisition Letter 98-06. Canceled by DOE O 361.1 Chg 1.

  10. Acquisition Career Development Program

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

    2003-06-13T23:59:59.000Z

    To set forth requirements and responsibilities for the Department of Energy (DOE) Acquisition Career Development (ACD) Program, which implements Office of Federal Procurement Policy (OFPP) requirements, Federal Acquisition Regulation (FAR) requirements, Federal Acquisition Reform Act (FARA) requirements, and the career development objectives of Executive Order (E.O.) 12931. Change 1 approved 12-20-2001. Change 2 approved 06-13-03. Cancels DOE O 361.1 Chg 1. Canceled by DOE O 361.1A.

  11. Acquisition Career Development Program

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

    2001-12-20T23:59:59.000Z

    To set forth requirements and responsibilities for the Department of Energy (DOE) Acquisition Career Development (ACD) Program, which implements Office of Federal Procurement Policy (OFPP) requirements, Federal Acquisition Regulation (FAR) requirements, Federal Acquisition Reform Act (FARA) requirements, and the career development objectives of Executive Order (E.O.) 12931. Change 1 approved 12-20-2001. Cancels DOE O 361.1. Canceled by DOE O 361.1 Chg 2.

  12. Acquisition Career Management Program

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

    2008-01-24T23:59:59.000Z

    The order defines requirements and responsibilities for training, certification, and career development programs for the DOE acquisition workforce. Cancels DOE O 361.1A.

  13. Acquisition Career Management Program

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

    2015-05-14T23:59:59.000Z

    The order sets forth requirements and responsibilities for the Department of Energy (DOE) Acquisition Career Management Program. Cancels DOE O 361.1B.

  14. Review: ??????? ????: ????????????????? ??????? ?????? ?. ?. ????????? «?????». ?????? ?? ??????? ? ??????????? ??????????

    E-Print Network [OSTI]

    ????????, ??????????; Toichkina, Aleksandra

    2011-01-01T23:59:59.000Z

    — 145 — Ocene, zapiski, poro?ila – Reviews, Notes, Reports ??????? ????: ????????- ????????? ??????? ?????? ?. ?. ????????? «?????». ?????? ?? ??????? ? ??????????? ??????????. ?????-?????????, 2008. 247 ?. ? ?????????? ??????? ???? ????...- ??????, ???????????????? ?????? — 146 — Slavia Centralis 1/2011 Ocene, zapiski, poro?ila – Reviews, Notes, Reports ????????? ?? ? ????????? ????? ? ????, ? ???????? ?? ?????? ?????- ????????? ??????????? ?????? ????. ??? ???????? ?? ?????????? ???...

  15. Merger and Ring Galaxy Formation Rates at z<=2

    E-Print Network [OSTI]

    E. D'Onghia; M. Mapelli; B. Moore

    2008-06-20T23:59:59.000Z

    We compare the observed merger rate of galaxies over cosmic time and the frequency of collisional ring galaxies (CRGs), with analytic models and halo merger and collision rates from a large cosmological simulation. In the Lambda cold dark matter (LCDM) model we find that the cosmic {\\it merger fraction} does not evolve strongly between 0.2rate since z~1 might not be tied to a disappearing population of major mergers. Halos hosting massive galaxies undergo on average ~2 mergers from z~2 up to present day, reflecting the late assembly time for the massive systems and the related downsizing problem. The cosmic {\\it merger rate} declines with redshift: at the present time it is a factor of 10 lower than at z~2, in reasonable agreement with the current available data. The rate of CRG formation derived from the interactions between halo progenitors up to z=2 is found to be a good tracer of the cosmic merger rate. In the LCDM model the rate of CRGs as well as the merger rate do not scale as (1+z)^m, as suggested by previous models. Our predictions of cosmic merger and CRG rates may be applied to forthcoming surveys such as GOODS and zCOSMOS.

  16. Electricity Merger Policy in the Shadow of Regulation

    E-Print Network [OSTI]

    Gilbert, Richard J; Newberry, David M

    2006-01-01T23:59:59.000Z

    merger. The form of the Emissions Trading System amplifiesvertical integration, emissions trading JEL classification:under the European Emissions Trading System in January 2005,

  17. Electricity Merger Policy in the Shadow of Regulation

    E-Print Network [OSTI]

    Gilbert, Richard J; Newberry, David M

    2006-01-01T23:59:59.000Z

    For The Dutch Electricity Sector, NMa, June (available atanalysing horizontal electricity sector mergers, that is notfuel, gas into the electricity sector (exemplified by both

  18. REFORM OF EUROPEAN MERGER POLICY Bruce R Lyons

    E-Print Network [OSTI]

    Feigon, Brooke

    REFORM OF EUROPEAN MERGER POLICY by Bruce R Lyons CCR Working Paper CCR 03-5 Abstract This article highlights the main drivers for merger policy reform in the EU, including the consequences of the recent appeal court reverses. It discusses some of the substantive and procedural issues that the reform package

  19. An increased estimate of the merger rate of double neutron

    E-Print Network [OSTI]

    Sarkissian, John M.

    -star merger rate in the Galaxy is crucial in order to predict whether current gravity wave detectors of only a few double-neutron-star binaries with merger times less than the age of the Universe. Here we position and flux density for the pulsar. Knowledge of the pulsar position with subarcsecond precision

  20. Bundling and Mergers in Energy Markets Laurent Graniery

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ...cant example is the merger case between E.ON and Ruhrgas on the German market. Although the merger proposal producer in Germany while E.ON, the ...rst electricity one. E.ON only owned holdings in a few local

  1. Mergers in the GB Electricity Market: effects on Retail Charges

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Mergers in the GB Electricity Market: effects on Retail Charges N° 2006-08 Mai 2006 Evens SALIES OFCE hal-00972962,version1-3Apr2014 #12;Mergers in the GB Electricity Market: effects on Retail Charges-efficiency as variables relating to price and profitability. The retail electricity market is a case in point, as high

  2. Efficiency Defence, Administrative Fuzziness, and Commitment in Merger Regulation

    E-Print Network [OSTI]

    Feigon, Brooke

    Efficiency Defence, Administrative Fuzziness, and Commitment in Merger Regulation by Andrei: This paper develops a signalling model to look at some effects of the inclusion of an efficiency defence of parameters. May 2006 JEL Classification: K21; L44; L51 Keywords: Merger Regulation, Efficiency Defence

  3. Correlation between Galaxy Mergers and Luminous AGN

    E-Print Network [OSTI]

    Hong, Jueun; Kim, Minjin; Ho, Luis C

    2015-01-01T23:59:59.000Z

    It is not yet clear what triggers the activity of active galactic nuclei (AGNs), but galaxy merging has been suspected to be one of the main mechanisms fuelling the activity. Using deep optical images taken at various ground-based telescopes, we investigate the fraction of galaxy mergers in 39 luminous AGNs (M$_{R}\\, \\lesssim$ -22.6 mag) at $z \\leq$ 0.3 (a median redshift of 0.155), of which the host galaxies are generally considered as early-type galaxies. Through visual inspection of the images, we find that 17 of 39 AGN host galaxies (43.6%) show the evidence for current or past mergers like tidal tails, shells, and disturbed morphology. In order to see if this fraction is abnormally high, we also examined the merging fraction of normal early-type galaxies in the Sloan Digital Sky Survey (SDSS) Strip 82 data (a median redshift of 0.04), of which the surface-brightness limit is comparable to our imaging data. To correct for the effects related to the redshift difference of the two samples, we performed an i...

  4. Data acquisition system

    DOE Patents [OSTI]

    Shapiro, Stephen L. (14228 Amherst Ct., Los Altos Hills, CA 94022); Mani, Sudhindra (1618 17th St., Sacramento, CA 95814); Atlas, Eugene L. (440 De Anza Ct., Oceanside, CA 92057); Cords, Dieter H. W. (526 Cuesta Real, La Honda, CA 94020); Holbrook, Britt (4540 Varsity Ct., Sacramento, CA 95841)

    1997-01-01T23:59:59.000Z

    A data acquisition circuit for a particle detection system that allows for time tagging of particles detected by the system. The particle detection system screens out background noise and discriminate between hits from scattered and unscattered particles. The detection system can also be adapted to detect a wide variety of particle types. The detection system utilizes a particle detection pixel array, each pixel containing a back-biased PIN diode, and a data acquisition pixel array. Each pixel in the particle detection pixel array is in electrical contact with a pixel in the data acquisition pixel array. In response to a particle hit, the affected PIN diodes generate a current, which is detected by the corresponding data acquisition pixels. This current is integrated to produce a voltage across a capacitor, the voltage being related to the amount of energy deposited in the pixel by the particle. The current is also used to trigger a read of the pixel hit by the particle.

  5. Acquisition Fellows Program

    Broader source: Energy.gov [DOE]

    Acquisition Fellows Program (AFP)- is a program designed to recruit, acquire, develop and retain 1102 series contract specialist. Fellows are recruited, hired, selected and funded by their sponsoring DOE/NNSA office.

  6. Formation of Nuclear Disks and Supermassive Black Hole Binaries in Multi-Scale Hydrodynamical Galaxy Mergers

    E-Print Network [OSTI]

    Lucio Mayer; Stelios Kazantzidis; Andres Escala

    2008-07-22T23:59:59.000Z

    (Abridged) We review the results of the first multi-scale, hydrodynamical simulations of mergers between galaxies with central supermassive black holes (SMBHs) to investigate the formation of SMBH binaries in galactic nuclei. We demonstrate that strong gas inflows produce nuclear disks at the centers of merger remnants whose properties depend sensitively on the details of gas thermodynamics. In numerical simulations with parsec-scale spatial resolution in the gas component and an effective equation of state appropriate for a starburst galaxy, we show that a SMBH binary forms very rapidly, less than a million years after the merger of the two galaxies. Binary formation is significantly suppressed in the presence of a strong heating source such as radiative feedback by the accreting SMBHs. We also present preliminary results of numerical simulations with ultra-high spatial resolution of 0.1 pc in the gas component. These simulations resolve the internal structure of the resulting nuclear disk down to parsec scales and demonstrate the formation of a central massive object (~ 10^8 Mo) by efficient angular momentum transport. This is the first time that a radial gas inflow is shown to extend to parsec scales as a result of the dynamics and hydrodynamics involved in a galaxy merger, and has important implications for the fueling of SMBHs. Due to the rapid formation of the central clump, the density of the nuclear disk decreases significantly in its outer region, reducing dramatically the effect of dynamical friction and leading to the stalling of the two SMBHs at a separation of ~1 pc. We discuss how the orbital decay of the black holes might continue in a more realistic model which incorporates star formation and the multi-phase nature of the ISM.

  7. Evolution of the galaxy merger rate in model universes

    E-Print Network [OSTI]

    Abilio Mateus

    2008-02-20T23:59:59.000Z

    We investigate the evolution of the galaxy merger rate predicted by two semi-analytical galaxy formation models implemented on the Millennium Simulation of dark matter structure growth. The fraction of merging galaxy pairs at each time-step of the simulation is derived from the galaxy catalogues obtained by the models and the results are compared with various observational estimates of merger fractions taken from the literature. We find a good match between the pair fractions derived from the simulation and the observed counting of galaxy pairs obtained by different sources in the redshift range 0 evolution of the number of galaxy mergers per Gyr grows with redshift as an exponential rate proportional to (1+z)^m, with m ranging from 0.6 to 0.8 for 0 evolution in the fraction of galaxy mergers since z ~ 1.2. The weak evolution predicted for the galaxy merger rate in an hierarchical model universe shows that the mass assembly evolution of galaxies through mergers does not follow the rapid evolution of the halo merger rate obtained in previous studies.

  8. POLICY FLASH 2014-23 Acquisition Guide 13.3 Simplified Acquisition...

    Energy Savers [EERE]

    3 Acquisition Guide 13.3 Simplified Acquisition Procedures POLICY FLASH 2014-23 Acquisition Guide 13.3 Simplified Acquisition Procedures Questions concerning this policy flash...

  9. Institutions and Cross-border Mergers and Acquisitions (M&A) Value Creation

    E-Print Network [OSTI]

    Zhu, Hong

    2012-02-14T23:59:59.000Z

    &M University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY Approved by: Chair of Committee, Michael A. Hitt Committee Members, Lorraine Eden Laszlo Tihanyi Dudley L. Poston, Jr. Head of Department, Murray R... as much as I can during my career! Thank you, Mike! All of these are truly and greatly appreciated! My committee members Drs. Lorraine Eden, Laszlo Tihanyi and Dudley L. Poston, Jr. have been very supportive, and provided their very valuable...

  10. Electricity Merger Policy in the Shadow of Regulation

    E-Print Network [OSTI]

    Gilbert, Richard J; Newberry, David M

    2006-01-01T23:59:59.000Z

    Pennsylvania-New Jersey-Maryland (PJM) electricity wholesalehour of the next day. The PJM also solicits real-time bidseffects of a merger in the PJM region should consider price

  11. Acquisition | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyDepartment ofATVM Loan ProgramUs AboutAcquisitionAcquisition

  12. Short Gamma-Ray Bursts from Binary Neutron Star Mergers

    E-Print Network [OSTI]

    Roland Oechslin; Thomas Janka

    2006-04-27T23:59:59.000Z

    We present the results from new relativistic hydrodynamic simulations of binary neutron star mergers using realistic non-zero temperature equations of state. We vary several unknown parameters in the system such as the neutron star (NS) masses, their spins and the nuclear equation of state. The results are then investigated with special focus on the post-merger torus-remnant system. Observational implications on the Gamma-ray burst (GRB) energetics are discussed and compared with recent observations.

  13. Language Acquisition Computational Intelligence

    E-Print Network [OSTI]

    Fong, Sandiway

    problem (at 2 levels) · Poverty of the stimulus (at 2 levels) · Noisy data (at 2 levels) #12;The Induction out. #12;Poverty of the Stimulus · Generalization in any domain requires the learner to solve is entirely missing during the acquisition process. E.g., ... #12;Poverty of the Stimulus · Statement

  14. Wholesale Late Merger: Beyond the A/A[over-bar] Distinction

    E-Print Network [OSTI]

    Takahashi, Shoichi

    In this article, we develop a substantially expanded theory of late merger. Adopting related insights by Fox (2002), we argue that late merger is permitted whenever an output representation can be interpreted in the semantic ...

  15. An analysis of the impact of mergers between community development corporations

    E-Print Network [OSTI]

    Haque, Shoma S

    2005-01-01T23:59:59.000Z

    This thesis explores the occurrence of mergers between community development corporations (CDC's) in the United States in the past five years. The research examines how mergers between CDC's affect their capacity to achieve ...

  16. General Relativistic Binary Merger Simulations and Short Gamma Ray Bursts

    E-Print Network [OSTI]

    Joshua A. Faber; Thomas W. Baumgarte; Stuart L. Shapiro; Keisuke Taniguchi

    2006-03-10T23:59:59.000Z

    The recent localization of some short-hard gamma ray bursts (GRBs) in galaxies with low star formation rates has lent support to the suggestion that these events result from compact object binary mergers. We discuss how new simulations in general relativity are helping to identify the central engine of short-hard GRBs. Motivated by our latest relativistic black hole-neutron star merger calculations, we discuss a scenario in which these events may trigger short-hard GRBs, and compare this model to competing relativistic models involving binary neutron star mergers and the delayed collapse of hypermassive neutron stars. Distinguishing features of these models may help guide future GRB and gravitational wave observations to identify the nature of the sources.

  17. Globular Clusters in Elliptical Galaxies: Constraints on Mergers

    E-Print Network [OSTI]

    Duncan Forbes

    1997-11-14T23:59:59.000Z

    Understanding the formation of globular clusters will help us to constrain the evolutionary history of galaxies. For mergers on-going today, it appears that the number of newly created proto-globulars varies with the progenitor types and that the percentage increase in the total cluster population is 100% or less. Elliptical galaxies, which are generally thought to be the end-result of such mergers, often show evidence for two populations of globular clusters. This has been taken as support for the merger picture but we show that there are several problems when examined in detail. Strong evidence for an elliptical galaxy with a single population of globular clusters is also presented. Implications for galaxy formation are briefly mentioned.

  18. Nonthermal Particles and Radiation Produced by Cluster Merger Shocks

    E-Print Network [OSTI]

    Berrington, R C; 10.1086/376981

    2009-01-01T23:59:59.000Z

    We have developed a numerical model for the temporal evolution of particle and photon spectra resulting from nonthermal processes at the shock fronts formed in merging clusters of galaxies. Fermi acceleration is approximated by injecting power-law distributions of particles during a merger event, subject to constraints on maximum particle energies. We consider synchrotron, bremsstrahlung, Compton, and Coulomb processes for the electrons, nuclear, photomeson, and Coulomb processes for the protons, and knock-on electron production during the merging process. The broadband radio through gamma-ray emission radiated by nonthermal protons and primary and secondary electrons is calculated both during and after the merger event. Using ROSAT observations to establish typical parameters for the matter density profile of clusters of galaxies, we find that typical merger shocks are weak and accelerate particles with relatively soft spectra. We consider the prospects for detecting nonthermal radio and gamma-ray emission f...

  19. BRIGHT 'MERGER-NOVA' FROM THE REMNANT OF A NEUTRON STAR BINARY MERGER: A SIGNATURE OF A NEWLY BORN, MASSIVE, MILLISECOND MAGNETAR

    SciTech Connect (OSTI)

    Yu, Yun-Wei [Institute of Astrophysics, Central China Normal University, Wuhan 430079 (China)] [Institute of Astrophysics, Central China Normal University, Wuhan 430079 (China); Zhang, Bing; Gao, He, E-mail: yuyw@mail.ccnu.edu.cn, E-mail: zhang@physics.unlv.edu [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States)] [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States)

    2013-10-20T23:59:59.000Z

    A massive millisecond magnetar may survive the merger of a neutron star (NS) binary, which would continuously power the merger ejecta. We develop a generic dynamic model for the merger ejecta with energy injection from the central magnetar. The ejecta emission (the {sup m}erger-nova{sup )} powered by the magnetar peaks in the UV band and the peak of the light curve, progressively shifts to an earlier epoch with increasing frequency. A magnetar-powered merger-nova could have an optical peak brightness comparable to a supernova, which is a few tens or hundreds times brighter than the radioactive-powered merger-novae (the so-called macro-nova or kilo-nova). On the other hand, such a merger-nova would peak earlier and have a significantly shorter duration than that of a supernova. An early collapse of the magnetar could suppress the brightness of the optical emission and shorten its duration. Such millisecond-magnetar-powered merger-novae may be detected from NS-NS merger events without an observed short gamma-ray burst, and could be a bright electromagnetic counterpart for gravitational wave bursts due to NS-NS mergers. If detected, it suggests that the merger leaves behind a massive NS, which has important implications for the equation-of-state of nuclear matter.

  20. RADIATIVE TRANSFER SIMULATIONS OF NEUTRON STAR MERGER EJECTA

    SciTech Connect (OSTI)

    Tanaka, Masaomi [National Astronomical Observatory of Japan, Mitaka, Tokyo (Japan); Hotokezaka, Kenta, E-mail: masaomi.tanaka@nao.ac.jp, E-mail: hotoke@tap.scphys.kyoto-u.ac.jp [Department of Physics, Kyoto University, Kyoto (Japan)

    2013-10-01T23:59:59.000Z

    Mergers of binary neutron stars (NSs) are among the most promising gravitational wave (GW) sources. Next generation GW detectors are expected to detect signals from NS mergers within about 200 Mpc. The detection of electromagnetic wave (EM) counterparts is crucial to understanding the nature of GW sources. Among the possible EM emission from the NS merger, emission powered by radioactive r-process nuclei is one of the best targets for follow-up observations. However, predictions so far have not taken into account detailed r-process element abundances in the ejecta. We perform for the first time radiative transfer simulations of the NS merger ejecta including all the r-process elements from Ga to U. We show that the opacity of the NS merger ejecta is about ? = 10 cm{sup 2} g{sup –1}, which is higher than that of Fe-rich Type Ia supernova ejecta by a factor of ?100. As a result, the emission is fainter and lasts longer than previously expected. The spectra are almost featureless due to the high expansion velocity and bound-bound transitions of many different r-process elements. We demonstrate that the emission is brighter for a higher mass ratio of the two NSs and a softer equation of state adopted in the merger simulations. Because of the red color of the emission, follow-up observations in red optical and near-infrared (NIR) wavelengths will be the most efficient. At 200 Mpc, the expected brightness of the emission is i = 22-25 AB mag, z = 21-23 AB mag, and 21-24 AB mag in the NIR JHK bands. Thus, observations with wide-field 4 m- and 8 m-class optical telescopes and wide-field NIR space telescopes are necessary. We also argue that the emission powered by radioactive energy can be detected in the afterglow of nearby short gamma-ray bursts.

  1. Federal Acquisition Regulation

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers New Training on Energy ManagementAugustin2012)4 News BlastAcquisition FLASH3

  2. Acquisition Guide --------------------â€

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter 42.5

  3. Acquisition Strategy RM

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613Portsmouth SitePresentations |State Wind EnergyEnergy26.17AcquisitionNo. AL

  4. Status of LIGO and Virgo Searches for Black Hole Mergers

    E-Print Network [OSTI]

    Maryland at College Park, University of

    Freq Time ? #12;11 Searches With an EM Counterpart Gamma Ray Bursts GRB 070201 : not a merger in M31.3824 ] Soft Gamma Repeater Flares GW burst at time of flare? [ PRL 101, 211102 ; ApJL 701, L68 ] GW QPO in progress S4 #12;10 Robust Searches for Arbitrary "Burst" Signals Use excess power and/or cross

  5. Feedback in simulations of disc-galaxy major mergers

    E-Print Network [OSTI]

    T. J. Cox; Patrik Jonsson; Joel R. Primack; Rachel S. Somerville

    2007-09-25T23:59:59.000Z

    Using hydrodynamic simulations of disc-galaxy major mergers, we investigate the star formation history and remnant properties when various parametrizations of a simple stellar feedback model are implemented. The simulations include radiative cooling, a density-dependent star formation recipe and a model for feedback from massive stars. The feedback model stores supernova feedback energy within individual gas particles and dissipates this energy on a time-scale specified by two free parameters; tau_fb, which sets the dissipative time-scale, and n, which sets the effective equation of state in star-forming regions. Using a self-consistent disc galaxy, modelled after a local Sbc spiral, in both isolated and major-merger simulations, we investigate parametrizations of the feedback model that are selected with respect to the quiescent disc stability. These models produce a range of star formation histories that are consistent with the star formation relation found by Kennicutt. All major mergers produce a population of new stars that is highly centrally concentrated, demonstrating a distinct break in the r1/4 surface density profile, consistent with previous findings. The half-mass radius and one-dimensional velocity dispersion are affected by the feedback model used. Finally, we compare our results to those of previous simulations of star formation in disc-galaxy major mergers, addressing the effects of star formation normalization, the version of smoothed particle hydrodynamics (SPH) employed and assumptions about the interstellar medium.

  6. THE FORMATION OF YOUNG DENSE STAR CLUSTERS THROUGH MERGERS

    SciTech Connect (OSTI)

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

    2012-07-01T23:59:59.000Z

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

  7. FORMATION OF STABLE MAGNETARS FROM BINARY NEUTRON STAR MERGERS

    SciTech Connect (OSTI)

    Giacomazzo, Bruno [JILA, University of Colorado and National Institute of Standards and Technology, Boulder, CO 80309 (United States); Perna, Rosalba [JILA and Department of Astrophysical and Planetary Sciences, University of Colorado, Boulder, CO 80309 (United States)

    2013-07-10T23:59:59.000Z

    By performing fully general relativistic magnetohydrodynamic simulations of binary neutron star mergers, we investigate the possibility that the end result of the merger is a stable magnetar. In particular, we show that, for a binary composed of two equal-mass neutron stars (NSs) of gravitational mass M {approx} 1.2 M{sub Sun} and equation of state similar to Shen et al. at high densities, the merger product is a stable NS. Such NS is found to be differentially rotating and ultraspinning with spin parameter J/M{sup 2} {approx} 0.86, where J is its total angular momentum, and it is surrounded by a disk of Almost-Equal-To 0.1 M{sub Sun }. While in our global simulations the magnetic field is amplified by about two orders of magnitude, local simulations have shown that hydrodynamic instabilities and the onset of the magnetorotational instability could further increase the magnetic field strength up to magnetar levels. This leads to the interesting possibility that, for some NS mergers, a stable and magnetized NS surrounded by an accretion disk could be formed. We discuss the impact of these new results for the emission of electromagnetic counterparts of gravitational wave signals and for the central engine of short gamma-ray bursts.

  8. The Fate of the Compact Remnant in Neutron Star Mergers

    E-Print Network [OSTI]

    Chris L. Fryer; Krzysztoff Belczynski; Enrico Ramirez-Ruiz; Stephan Rosswog; Gang Shen; Andrew W. Steiner

    2015-04-28T23:59:59.000Z

    Neutron star (binary neutron star and neutron star - black hole) mergers are believed to produce short-duration gamma-ray bursts. They are also believed to be the dominant source of gravitational waves to be detected by the advanced LIGO and the dominant source of the heavy r-process elements in the universe. Whether or not these mergers produce short-duration GRBs depends sensitively on the fate of the core of the remnant (whether, and how quickly, it forms a black hole). In this paper, we combine the results of merger calculations and equation of state studies to determine the fate of the cores of neutron star mergers. Using population studies, we can determine the distribution of these fates to compare to observations. We find that black hole cores form quickly only for equations of state that predict maximum non-rotating neutron star masses below 2.3-2.4 solar masses. If quick black hole formation is essential in producing gamma-ray bursts, LIGO observed rates compared to GRB rates could be used to constrain the equation of state for dense nuclear matter.

  9. The Fate of the Compact Remnant in Neutron Star Mergers

    E-Print Network [OSTI]

    Fryer, Chris L; Ramirez-Ruiz, Enrico; Rosswog, Stephan; Shen, Gang; Steiner, Andrew W

    2015-01-01T23:59:59.000Z

    Neutron star (binary neutron star and neutron star - black hole) mergers are believed to produce short-duration gamma-ray bursts. They are also believed to be the dominant source of gravitational waves to be detected by the advanced LIGO and the dominant source of the heavy r-process elements in the universe. Whether or not these mergers produce short-duration GRBs depends sensitively on the fate of the core of the remnant (whether, and how quickly, it forms a black hole). In this paper, we combine the results of merger calculations and equation of state studies to determine the fate of the cores of neutron star mergers. Using population studies, we can determine the distribution of these fates to compare to observations. We find that black hole cores form quickly only for equations of state that predict maximum non-rotating neutron star masses below 2.3-2.4 solar masses. If quick black hole formation is essential in producing gamma-ray bursts, LIGO observed rates compared to GRB rates could be used to constr...

  10. Gamma-Ray Bursts from Neutron Star Mergers

    E-Print Network [OSTI]

    T. Piran

    1994-01-17T23:59:59.000Z

    Binary neutron stars merger (NS$^2$M) at cosmological distances is probably the only $\\gamma$-ray bursts model based on an independently observed phenomenon which is known to be taking place at a comparable rate. We describe this model, its predictions and some open questions.

  11. Magnetically-induced outflows from binary neutron star merger remnants

    E-Print Network [OSTI]

    Daniel M. Siegel; Riccardo Ciolfi

    2015-05-06T23:59:59.000Z

    Recent observations by the Swift satellite have revealed long-lasting ($\\sim 10^2-10^5\\,\\mathrm{s}$), "plateau-like" X-ray afterglows in the vast majority of short gamma-ray bursts events. This has put forward the idea of a long-lived millisecond magnetar central engine being generated in a binary neutron star (BNS) merger and being responsible for the sustained energy injection over these timescales ("magnetar model"). We elaborate here on recent simulations that investigate the early evolution of such a merger remnant in general-relativistic magnetohydrodynamics. These simulations reveal very different conditions than those usually assumed for dipole spin-down emission in the magnetar model. In particular, the surrounding of the newly formed NS is polluted by baryons due to a dense, highly magnetized and isotropic wind from the stellar surface that is induced by magnetic field amplification in the interior of the star. The timescales and luminosities of this wind are compatible with early X-ray afterglows, such as the "extended emission". These isotropic winds are a generic feature of BNS merger remnants and thus represent an attractive alternative to current models of early X-ray afterglows. Further implications to BNS mergers and short gamma-ray bursts are discussed.

  12. Policy Flash 2013-78 Acquisition Guide Chapter 7.3 Acquisition...

    Energy Savers [EERE]

    8 Acquisition Guide Chapter 7.3 Acquisition Planning in the M&O Environment Policy Flash 2013-78 Acquisition Guide Chapter 7.3 Acquisition Planning in the M&O Environment Questions...

  13. Surface density profiles of collisionless disc merger remnants

    E-Print Network [OSTI]

    Thorsten Naab; Ignacio Trujillo

    2006-03-01T23:59:59.000Z

    We present a detailed surface density analysis of a large sample of simulated collisionless mergers of disc galaxies with bulges (mass ratios 1:1, 2:1, 3:1, 4:1, and 6:1) and without bulges (mass ratios 1:1 and 3:1). They were classified, according to their bulge--to--total ($B/T$) ratio, either as a one-component system or as a two-component systems. In general projection effects change the classification of a remnant. Only merger remnants of discs with bulges show properties similar to observed early--type galaxies. Their B/T ratios are in the range $0.2merger origin for all early-type galaxies, especially the most massive ones, is unlikely. Observed nearby merger remnants have properties similar to the simulated remnants. They can have formed from binary disc mergers and might evolve into early--type galaxies within a few Gyrs (abbreviated).

  14. Georgia Tech Vehicle Acquisition and

    E-Print Network [OSTI]

    1 2012 Georgia Tech 10/10/2012 Vehicle Acquisition and Disposition Manual #12;2 Vehicle Procedures Regardless of value, all vehicles should be included in this process. Acquisition of a Vehicle 1. Contact Fleet Coordinator to guide the departments in the purchasing process for all vehicles. 2. Fill out

  15. GSA Office of Governmentwide Acquisition Potlcy

    Energy Savers [EERE]

    AGENCY ACQUISITION COUNCIL (CAAC) Class Deviation from the FederalAcquisition Regulation (FAR) Subpart 13.5, Test Program for Certain Commercial ltems FROM: This memorandum...

  16. Searchable Electronic Department of Energy Acquisition Regulation...

    Office of Environmental Management (EM)

    Searchable Electronic Department of Energy Acquisition Regulation Searchable Electronic Department of Energy Acquisition Regulation Updated July 2, 2013. The EDEAR is current...

  17. Merger Histories of Galaxy Halos and Implications for Disk Survival

    SciTech Connect (OSTI)

    Stewart, Kyle R.; Bullock, James S.; Wechsler, Risa H.; Maller, Ariyeh H.; Zentner, Andrew R.

    2008-05-16T23:59:59.000Z

    The authors study the merger histories of galaxy dark matter halos using a high resolution {Lambda}CDM N-body simulation. The merger trees follow {approx} 17,000 halos with masses M{sub 0} = (10{sup 11} - 10{sup 13})h{sup -1}M{sub {circle_dot}} at z = 0 and track accretion events involving objects as small as m {approx_equal} 10{sup 10} h{sup -1}M{sub {circle_dot}}. They find that mass assembly is remarkably self-similar in m/M{sub 0}, and dominated by mergers that are {approx}10% of the final halo mass. While very large mergers, m {approx}> 0.4 M{sub 0}, are quite rare, sizeable accretion events, m {approx} 0.1 M{sub 0}, are common. Over the last {approx} 10 Gyr, an overwhelming majority ({approx} 95%) of Milky Way-sized halos with M{sub 0} = 10{sup 12} h{sup -1}M{sub {circle_dot}} have accreted at least one object with greater total mass than the Milky Way disk (m > 5 x 10{sup 10} h{sup -1}M{sub {circle_dot}}), and approximately 70% have accreted an object with more than twice that mass (m > 10{sup 11} h{sup -1}M{sub {circle_dot}}). The results raise serious concerns about the survival of thin-disk dominated galaxies within the current paradigm for galaxy formation in a {Lambda}CDM universe. in order to achieve a {approx} 70% disk-dominated fraction in Milky Way-sized {Lambda}CDM halos, mergers involving m {approx_equal} 2 x 10{sup 11} h{sup -1}M{sub {circle_dot}} objects must not destroy disks. Considering that most thick disks and bulges contain old stellar populations, the situation is even more restrictive: these mergers must not heat disks or drive gas into their centers to create young bulges.

  18. The Role of Interactions and Mergers

    E-Print Network [OSTI]

    F. Combes

    1998-04-13T23:59:59.000Z

    Galaxy evolution depends strongly on the environment. Dynamical interactions and subsequent evolution make galaxies more concentrated, with higher surface densities, and also trigger star-formation, which consumes the available cold gas. Already at z=0, a large variety of galaxy types are observed, with different evolution stages, from the unevolved gas rich dwarf irregulars, or low surface brightness galaxies, to early-type concentrated galaxies, with no remaining gas. The dynamical processes of galaxy interactions, including internal evolution, are reviewed and evidence is shown of much larger interaction/merging rate at high redshift.

  19. Detecting neutrinos from black hole neutron stars mergers

    E-Print Network [OSTI]

    O. L. Caballero; G. C. McLaughlin; R. Surman

    2009-10-08T23:59:59.000Z

    While it is well known that neutrinos are emitted from standard core collapse protoneutron star supernovae, less attention has been focused on neutrinos from accretion disks. These disks occur in some supernovae (i.e. "collapsars") as well as in compact object mergers, and they emit neutrinos with similar properties to those from protoneutron star supernovae. These disks and their neutrinos play an important role in our understanding of gamma ray bursts as well as the nucleosynthesis they produce. We study a disk that forms in the merger of a black hole and a neutron star and examine the neutrino fluxes, luminosities and neutrino surfaces for the disk. We also estimate the number of events that would be registered in current and proposed supernova neutrino detectors if such an event were to occur in the Galaxy.

  20. Mergers of Supermassive Black Holes in Astrophysical Environments

    E-Print Network [OSTI]

    Tanja Bode; Tamara Bogdanovic; Roland Haas; James Healy; Pablo Laguna; Deirdre Shoemaker

    2011-10-12T23:59:59.000Z

    Modeling the late inspiral and merger of supermassive black holes is central to understanding accretion processes and the conditions under which electromagnetic emission accompanies gravitational waves. We use fully general relativistic, hydrodynamics simulations to investigate how electromagnetic signatures correlate with black hole spins, mass ratios, and the gaseous environment in this final phase of binary evolution. In all scenarios, we find some form of characteristic electromagnetic variability whose pattern depends on the spins and binary mass ratios. Binaries in hot accretion flows exhibit a flare followed by a sudden drop in luminosity associated with the plunge and merger, as well as quasi-periodic oscillations correlated with the gravitational waves during the inspiral. Conversely, circumbinary disk systems are characterized by a low luminosity of variable emission, suggesting challenging prospects for their detection.

  1. The Merger History of Supermassive Black Holes in Galaxies

    E-Print Network [OSTI]

    Kristen Menou; Zoltan Haiman; Vijay K. Narayanan

    2001-05-20T23:59:59.000Z

    The ubiquity of supermassive black holes (SMBHs) at the centers of nearby luminous galaxies can arise from the multiple mergers experienced by dark matter halos in hierarchical structure formation models, even if only a small fraction of these galaxies harbor SMBHs at high redshifts. We illustrate this possibility using cosmological Monte Carlo simulations of the merger history of dark matter halos and their associated SMBHs. In our most extreme models, in order to populate nearly every bright galaxy with a SMBH at z=0, only a few percent of the halos with virial temperatures above 10^4 K are required to harbor a SMBH at high redshift. This possibility must be included in studies of the luminosity function and the clustering properties of quasars. We predict the number of SMBH merger events that are detectable by the gravitational wave experiment LISA, as a function of redshift, out to z=5. Although the event rates can be significantly reduced in scenarios with rare SMBHs, a minimum of \\~10 detectable merger events per year is predicted if SMBH binaries coalesce efficiently. The observed distribution of events with redshift could yield valuable information on the SMBH formation process. If SMBH binaries do not coalesce, we find that at least several SMBH slingshot ejections probably occurred from z=5 to the present in each galaxy more massive than ~10^11 Msun at z=0. Although our results are sensitive to the minimum cooling mass assumed for the formation of SMBHs, we expect the qualitative predictions of our models to be robust.

  2. The Role of Primordial Kicks on Black Hole Merger Rates

    E-Print Network [OSTI]

    Miroslav Micic; Tom Abel; Steinn Sigurdsson

    2006-09-15T23:59:59.000Z

    Primordial stars are likely to be very massive >30 Msun, form in isolation, and will likely leave black holes as remnants in the centers of their host dark matter halos. We expect primordial stars to form in halos in the mass range 10^6-10^10 Msun. Some of these early black holes, formed at redshifts z>10, could be the seed black hole for a significant fraction of the supermassive black holes found in galaxies in the local universe. If the black hole descendants of the primordial stars exist, their mergers with nearby supermassive black holes may be a prime candidate for long wavelength gravitational wave detectors. We simulate formation and evolution of dark matter halos in LambdaCDM universe. We seed high-redshift dark matter halos with early black holes, and explore the merger history of the host halos and the implications of black hole's kick velocities arising from their coalescence. The central concentration of low mass early black holes in present day galaxies is reduced if they experience even moderate kicks of tens of km/s. Even such modest kicks allow the black holes to leave their parent halo, which consequently leads to dynamical friction being less effective on the low mass black holes that were ejected, compared to those still embedded in their parent halos. Therefore, merger rates with central supermassive black holes in the largest halos may be reduced by more than an order of magnitude. Using analytical and illustrative cosmological N-body simulations, we quantify the role of kicks on the merger rates of black holes formed from massive metal free stars with supermassive black holes in present day galaxies.

  3. The Acquisition of Mayan Morphosyntax

    E-Print Network [OSTI]

    Pye, Clifton

    2002-01-01T23:59:59.000Z

    This paper assesses predictions for the acquisition of Mayan verbal inflections derived from structural, comparative and metrical theories. The structuralist theory of Wexler (1998) fails to predict K'iche' (Kiche) ...

  4. Knowledge Acquisition from Data Bases 

    E-Print Network [OSTI]

    Wu, Xindong

    Knowledge acquisition from databases is a research frontier for both data base technology and machine learning (ML) techniques,and has seen sustained research over recent years.It also acts as a link between the two ...

  5. The formation of globular clusters through minihalo-minihalo mergers

    E-Print Network [OSTI]

    Trenti, Michele; Jimenez, Raul

    2015-01-01T23:59:59.000Z

    We propose a novel scenario for the formation of Globular Clusters (GCs) based on the merger of two or more atomic cooling halos at high-redshift (z>6). The model naturally fulfills several key observational constraints on GCs that have emerged in the last decade. Specifically, absolute and relative ages, widespread presence of multiple stellar populations, spatial distribution around host galaxies, and correlations between galactocentric radius and metallicity. In our framework, the oldest globular clusters form the first generation stars as an intense burst in the center of a minihalo that grows above the threshold for hydrogen cooling (halo mass M_h~1e8 Msun) and undergoes a major merger within the cooling timescale (~150 Myr). Subsequent minor mergers and sustained gas infall bring new supply of pristine gas at the halo center, diluting AGB ejecta, and triggering additional bursts of star formation which form multiple generation of stars in the majority of the clusters. The DM halo around the GC is then s...

  6. Magnetic energy production by turbulence in binary neutron star mergers

    E-Print Network [OSTI]

    Zrake, Jonathan

    2013-01-01T23:59:59.000Z

    The simultaneous detection of electromagnetic and gravitational wave emission from merging neutron star binaries would aid greatly in their discovery and interpretation. By studying turbulent amplification of magnetic fields in local high-resolution simulations of neutron star merger conditions, we demonstrate that magnetar-level (~10^16) G fields are present throughout the merger duration. We find that the small-scale turbulent dynamo converts 60% of the randomized kinetic energy into magnetic fields on a merger time scale. Since turbulent magnetic energy dissipates through reconnection events which accelerate relativistic electrons, turbulence may facilitate the conversion of orbital kinetic energy into radiation. If 10^-4 of the ~ 10^53 erg of orbital kinetic available gets processed through reconnection, and creates radiation in the 15-150 keV band, then the fluence at 200 Mpc would be 10^-7 erg/cm^2, potentially rendering most merging neutron stars in the advanced LIGO and Virgo detection volumes detecta...

  7. The Role of Primordial Kicks on Black Hole Merger Rates

    E-Print Network [OSTI]

    Miroslav Micic; Tom Abel; Steinn Sigurdsson

    2006-09-06T23:59:59.000Z

    Primordial stars are likely to be very massive $\\geq30\\Msun$, form in isolation, and will likely leave black holes as remnants in the centers of their host dark matter halos in the mass range $10^{6}-10^{10}\\Ms$. Such early black holes, at redshifts z$\\gtsim10$, could be the seed black holes for the many supermassive black holes found in galaxies in the local universe. If they exist, their mergers with nearby supermassive black holes may be a prime signal for long wavelength gravitational wave detectors. We simulate formation of black holes in the center of high redshift dark matter halos and explore implications of initial natal kick velocities conjectured by some formation models. The central concentration of early black holes in present day galaxies is reduced if they are born even with moderate kicks of tens of km/s. The modest kicks allow the black holes to leave their parent halo, which consequently leads to dynamical friction being less effective on the lower mass black holes as compared to those still embedded in their parent halos. Therefore, merger rates may be reduced by more than an order of magnitude. Using analytical and illustrative cosmological N--body simulations we quantify the role of natal kicks of black holes formed from massive metal free stars on their merger rates with supermassive black holes in present day galaxies. Our results also apply to black holes ejected by the gravitational slingshot mechanism.

  8. The use of gravitational lenses in the study of distant galaxy mergers

    E-Print Network [OSTI]

    Kats, A V

    2013-01-01T23:59:59.000Z

    Gravlenses are efficiently explored for detecting the most distant galaxies (up to z=10 redshifts). As an example of the role played by gravlenses we refer to the observation of the galaxy merger at z=3 (Borys, et al; Berciano Alba, et al). We derived solutions for the Smoluchowski kinetic equation for the mass function of galaxies, which describes mergers in differential approximation (minor mergers). It is shown that the evolution of the slope of luminosity function observed in the Ultra Deep Hubble Field (Bouwence et al) can be described as a result of explosive evolution driven by galaxy mergers.

  9. NIR Luminosity Function of Galaxies in Close Major-Merger Pairs and Mass Dependence of Merger Rate

    E-Print Network [OSTI]

    C. K. Xu; Y. C. Sun; X. T. He

    2004-02-07T23:59:59.000Z

    A sample of close major-merger pairs (projected separation ${\\rm 5 \\leq r \\leq 20 h^{-1}}$ kpc, ${\\rm K_s}$ band magnitude difference $\\delta {\\rm K_s} \\leq 1$ mag) is selected from the matched 2MASS-2dFGRS catalog of Cole et al. (2001). The pair primaries are brighter than ${\\rm K_s} = 12.5$ mag. After corrections for various biases, the comparison between counts in the paired galaxy sample and counts in the parent sample shows that for the local `M* galaxies' sampled by flux limited surveys, the fraction of galaxies in the close major-merger pairs is 1.70$\\pm 0.32%$. Using 38 paired galaxies in the sample, a ${\\rm K_s}$ band luminosity function (LF) is calculated. This is the first unbiased LF for a sample of objectively defined interacting/merging galaxies in the local universe, while all previously determined LFs of paired galaxies are biased by mistreating paired galaxies as singles. A stellar mass function (MF) is translated from the LF. Compared to the LF/MF of 2MASS galaxies, a differential pair fraction function is derived. The results suggest a trend in the sense that less massive galaxies may have lower chance to be involved in close major-merger pairs than more massive galaxies. The algorithm presented in this paper can be easily applied to much larger samples of 2MASS galaxies with redshifts in near future.

  10. FY06 DOE Energy Storage Program PEER Review

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

    6 DOE Energy Storage Program PEER REVIEW John D. Boyes Sandia National Laboratories ESS Program Makeup ESS Base Program - CECDOE Data Acquisition and Project Support - NYSERDADOE...

  11. Essays on horizontal merger simulation: the curse of dimensionality, retail price discrimination, and supply channel stage-games

    E-Print Network [OSTI]

    Pofahl, Geoffrey Michael

    2007-04-25T23:59:59.000Z

    ; Hosken et al., 2002; Capps, 14 Church, and Love, 2003; and Pinkse and Slade, 2004). This pattern of research makes perfect sense given that the essential inputs into any merger simulation are derived from an assumed demand model. Recently, merger...

  12. Termination of star formation by BH feedback in equal- and unequal-mass mergers of disk and elliptical galaxies

    E-Print Network [OSTI]

    Peter H. Johansson; Thorsten Naab; Andreas Burkert

    2008-09-19T23:59:59.000Z

    We present binary galaxy merger simulations of gas-rich disks (Sp-Sp), of early-type galaxies and disks (E-Sp, mixed mergers), and mergers of early-type galaxies (E-E, dry mergers) with varying mass ratios and different progenitor morphologies. The simulations include radiative cooling, star formation and black hole (BH) accretion and the associated feedback processes. We find for Sp-Sp mergers, that the peak star formation rate and BH accretion rate decrease and the growth timescales of the central black holes and newly formed stars increase with higher progenitor mass ratios. The termination of star formation by BH feedback in disk mergers is significantly less important for higher progenitor mass ratios (e.g. 3:1 and higher). In addition, the inclusion of BH feedback suppresses efficiently star formation in dry E-E mergers and mixed E-Sp mergers.

  13. Policy Flash 2015-14 Acquisition Letter 2015-03/Financial Acquisition...

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

    Subject to Energy and Water Development and Related Agencies Appropriations Act, 201 Policy Flash 2015-14 Acquisition Letter 2015-03Financial Acquisition Letter 2015-02...

  14. Acquisition Program | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0 ARRA Newsletters 20103-03 AUDITProducts &AcquisitionAcquisition Program

  15. Acquisition Resources | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0 ARRA Newsletters 20103-03 AUDITProducts &AcquisitionAcquisition

  16. Acquisition Letters | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyDepartment ofATVM Loan ProgramUs AboutAcquisition &Acquisition

  17. acquisition projects performance: Topics by E-print Network

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

    CLIC module acquisition crate, described in the document Study of the CLIC Module Front-End Acquisition and Evaluation Electronics 2. This acquisition system is a project based...

  18. E802 data acquisition complex

    SciTech Connect (OSTI)

    LeVine, M.J.

    1985-01-01T23:59:59.000Z

    The data acquisition architecture planned for experiment E802 is described. A VAX 11/785 will be front-ended by a VME-based array of 68000-family microprocessors, which will be used as intelligent CAMAC crate controllers, event builders, and to augment the computing power of the VAX for on-line analysis of the data. 4 refs.

  19. The Effects of the Political-Legal Environment and Corporate Characteristics on Mergers and Acquisitions in India, 1991-2005

    E-Print Network [OSTI]

    Ranganathan, Shilpa

    2012-07-16T23:59:59.000Z

    an analysis of the transition in public policy governing corporations between 1991 and 2005. The second part tests hypotheses derived from resource dependence theory relating to a firm’s decision to acquire. The analysis explores the factors that explain why...

  20. Factors influencing superior returns achieved through mergers & acquisitions of corporate spin-outs in the life sciences

    E-Print Network [OSTI]

    Magnani, Michael Robert

    2009-01-01T23:59:59.000Z

    Corporate spin-outs have become more frequent in the contemporary business environment as an alternate source of risk diversification and value creation for both the parent and external investors. Once established, corporate ...

  1. Mergers of binary neutron stars with realistic spin

    E-Print Network [OSTI]

    Sebastiano Bernuzzi; Tim Dietrich; Wolfgang Tichy; Bernd Bruegmann

    2014-06-06T23:59:59.000Z

    Simulations of binary neutron stars have seen great advances in terms of physical detail and numerical quality. However, the spin of the neutron stars, one of the simplest global parameters of binaries, remains mostly unstudied. We present the first, fully nonlinear general relativistic dynamical evolutions of the last three orbits for constraint satisfying initial data of spinning neutron star binaries, with astrophysically realistic spins aligned and anti-aligned to the orbital angular momentum. The initial data is computed with the constant rotational velocity approach. The dynamics of the systems is analyzed in terms of gauge-invariant binding energy vs. orbital angular momentum curves. By comparing to a binary black hole configuration we can estimate the different tidal and spin contributions to the binding energy for the first time. First results on the gravitational wave forms are presented. The phase evolution during the orbital motion is significantly affected by spin-orbit interactions, leading to delayed or early mergers. Furthermore, a frequency shift in the main emission mode of the hyper massive neutron star is observed. Our results suggest that a detailed modeling of merger waveforms requires the inclusion of spin, even for the moderate magnitudes observed in binary neutron star systems.

  2. Magnetically-induced outflows from binary neutron star merger remnants

    E-Print Network [OSTI]

    Siegel, Daniel M

    2015-01-01T23:59:59.000Z

    Recent observations by the Swift satellite have revealed long-lasting ($\\sim 10^2-10^5\\,\\mathrm{s}$), "plateau-like" X-ray afterglows in the vast majority of short gamma-ray bursts events. This has put forward the idea of a long-lived millisecond magnetar central engine being generated in a binary neutron star (BNS) merger and being responsible for the sustained energy injection over these timescales ("magnetar model"). We elaborate here on recent simulations that investigate the early evolution of such a merger remnant in general-relativistic magnetohydrodynamics. These simulations reveal very different conditions than those usually assumed for dipole spin-down emission in the magnetar model. In particular, the surrounding of the newly formed NS is polluted by baryons due to a dense, highly magnetized and isotropic wind from the stellar surface that is induced by magnetic field amplification in the interior of the star. The timescales and luminosities of this wind are compatible with early X-ray afterglows, ...

  3. Comprehensive nucleosynthesis analysis for ejecta of compact binary mergers

    E-Print Network [OSTI]

    Just, Oliver; Pulpillo, Ricard Ardevol; Goriely, Stephane; Janka, H -Thomas

    2015-01-01T23:59:59.000Z

    We present a comprehensive study of r-process element nucleosynthesis in the ejecta of compact binary mergers (CBMs) and their relic black-hole (BH)-torus systems. The evolution of the BH-accretion tori is simulated for seconds with a Newtonian hydrodynamics code including viscosity effects, pseudo-Newtonian gravity for rotating BHs, and an energy-dependent two-moment closure scheme for the transport of electron neutrinos and antineutrinos. The investigated cases are guided by relativistic double neutron star (NS-NS) and NS-BH merger models, producing ~3-6 Msun BHs with rotation parameters of A~0.8 and tori of 0.03-0.3 Msun. Our nucleosynthesis analysis includes the dynamical (prompt) ejecta expelled during the CBM phase and the neutrino and viscously driven outflows of the relic BH-torus systems. While typically ~20-25% of the initial accretion-torus mass are lost by viscously driven outflows, neutrino-powered winds contribute at most another ~1%, but neutrino heating enhances the viscous ejecta significantl...

  4. COSMOLOGICAL FAST RADIO BURSTS FROM BINARY WHITE DWARF MERGERS

    SciTech Connect (OSTI)

    Kashiyama, Kazumi; Mészáros, Peter [Department of Astronomy and Astrophysics, Department of Physics, Center for Particle and Gravitational Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States)] [Department of Astronomy and Astrophysics, Department of Physics, Center for Particle and Gravitational Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Ioka, Kunihito, E-mail: kzk15@psu.edu, E-mail: nnp@psu.edu, E-mail: kunihito.ioka@kek.jp [Theory Center, Institute of Particle and Nuclear Studies, KEK, Department of Particle and Nuclear Physics, the Graduate University for Advanced Studies (Sokendai), Tsukuba 305-0801 (Japan)] [Theory Center, Institute of Particle and Nuclear Studies, KEK, Department of Particle and Nuclear Physics, the Graduate University for Advanced Studies (Sokendai), Tsukuba 305-0801 (Japan)

    2013-10-20T23:59:59.000Z

    Recently, Thornton et al. reported the detection of four fast radio bursts (FRBs). The dispersion measures indicate that the sources of these FRBs are at cosmological distance. Given the large full sky event rate ?10{sup 4} sky{sup –1} day{sup –1}, the FRBs are a promising target for multi-messenger astronomy. Here we propose double degenerate, binary white-dwarf (WD) mergers as the source of FRBs, which are produced by coherent emission from the polar region of a rapidly rotating, magnetized massive WD formed after the merger. The basic characteristics of the FRBs, such as the energetics, emission duration and event rate, can be consistently explained in this scenario. As a result, we predict that some FRBs can accompany type Ia supernovae (SNe Ia) or X-ray debris disks. Simultaneous detection could test our scenario and probe the progenitors of SNe Ia, and moreover would provide a novel constraint on the cosmological parameters. We strongly encourage future SN and X-ray surveys that follow up FRBs.

  5. Following Black Hole Scaling Relations Through Gas-Rich Mergers

    E-Print Network [OSTI]

    Medling, Anne M; Max, Claire E; Sanders, David B; Armus, Lee; Holden, Bradford; Mieda, Etsuko; Wright, Shelley A; Larkin, James E

    2015-01-01T23:59:59.000Z

    We present black hole mass measurements from kinematic modeling of high-spatial resolution integral field spectroscopy of the inner regions of 9 nearby (ultra-)luminous infrared galaxies in a variety of merger stages. These observations were taken with OSIRIS and laser guide star adaptive optics on the Keck I and Keck II telescopes, and reveal gas and stellar kinematics inside the spheres of influence of these supermassive black holes. We find that this sample of black holes are overmassive ($\\sim10^{7-9}$ M$_{Sun}$) compared to the expected values based on black hole scaling relations, and suggest that the major epoch of black hole growth occurs in early stages of a merger, as opposed to during a final episode of quasar-mode feedback. The black hole masses presented are the dynamical masses enclosed in $\\sim$25pc, and could include gas which is gravitationally bound to the black hole but has not yet lost sufficient angular momentum to be accreted. If present, this gas could in principle eventually fuel AGN f...

  6. Office of Acquisition and Project Management ...

    Energy Savers [EERE]

    ; Office of Acquisition and Project Management Certifications Program Updated 102012 Course Provider Date Complete CON 216 LEGAL...

  7. Foundations of Artificial Intelligence Knowledge Acquisition

    E-Print Network [OSTI]

    Qu, Rong

    knowledge acquisition and knowledge engineering. To explain how knowledge is taken from a human before being against the original statement. Knowledge Acquisition The field of knowledge engineering can be defined Engineering Problem assessment Data and knowledge acquisition Bottleneck Development of a prototype system

  8. Radio Remnants of Compact Binary Mergers - the Electromagnetic Signal that will follow the Gravitational Waves

    E-Print Network [OSTI]

    Ehud Nakar; Tsvi Piran

    2011-02-04T23:59:59.000Z

    The question "what is the observable electromagnetic (EM) signature of a compact binary merger?" is an intriguing one with crucial consequences to the quest for gravitational waves (GW). Compact binary mergers are prime sources of GW, targeted by current and next generation detectors. Numerical simulations have demonstrated that these mergers eject energetic sub-relativistic (or even relativistic) outflows. This is certainly the case if the mergers produce short GRBs, but even if not, significant outflows are expected. The interaction of such outflows with the surround matter inevitably leads to a long lasting radio signal. We calculate the expected signal from these outflows (our calculations are also applicable to short GRB orphan afterglows) and we discuss their detectability. We show that the optimal search for such signal should, conveniently, take place around 1.4 GHz. Realistic estimates of the outflow parameters yield signals of a few hundred $\\mu$Jy, lasting a few weeks, from sources at the detection horizon of advanced GW detectors. Followup radio observations, triggered by GW detection, could reveal the radio remnant even under unfavorable conditions. Upcoming all sky surveys can detect a few dozen, and possibly even thousands, merger remnants at any give time, thereby providing robust merger rate estimates even before the advanced GW detectors become operational. In fact, the radio transient RT 19870422 fits well the overall properties predicted by our model and we suggest that its most probable origin is a compact binary merger radio remnant.

  9. Fast Access Data Acquisition System

    SciTech Connect (OSTI)

    Dr. Vladimir Katsman

    1998-03-17T23:59:59.000Z

    Our goal in this program is to develop Fast Access Data Acquisition System (FADAS) by combining the flexibility of Multilink's GaAs and InP electronics and electro-optics with an extremely high data rate for the efficient handling and transfer of collider experimental data. This novel solution is based on Multilink's and Los Alamos National Laboratory's (LANL) unique components and technologies for extremely fast data transfer, storage, and processing.

  10. Modelling a data acquisition system

    SciTech Connect (OSTI)

    Green, P.W.

    1986-02-01T23:59:59.000Z

    A data acquisition system to be run on a Data General ECLIPSE computer has been completely designed and developed using a VAX 11/780. This required that many of the features of the RDOS operating system be simulated on the VAX. Advantages and disadvantages of this approach are discussed, with particular regard to transportability of the system among different machines/operating systems, and the effect of the approach on various design decisions.

  11. Simulations of binary black hole mergers using spectral methods

    SciTech Connect (OSTI)

    Szilagyi, Bela; Lindblom, Lee; Scheel, Mark A. [Theoretical Astrophysics 350-17, California Institute of Technology, Pasadena, California 91125 (United States)

    2009-12-15T23:59:59.000Z

    Several improvements in numerical methods and gauge choice are presented that make it possible now to perform simulations of the merger and ringdown phases of 'generic' binary black hole evolutions using the pseudospectral evolution code SpEC. These improvements include the use of a new damped-wave gauge condition, a new grid structure with appropriate filtering that improves stability, and better adaptivity in conforming the grid structures to the shapes and sizes of the black holes. Simulations illustrating the success of these new methods are presented for a variety of binary black hole systems. These include fairly generic systems with unequal masses (up to 2 ratio 1 mass ratios), and spins (with magnitudes up to 0.4M{sup 2}) pointing in various directions.

  12. The water megamaser in the merger system Arp299

    E-Print Network [OSTI]

    A. Tarchi; P. Castangia; C. Henkel; K. M. Menten

    2006-10-30T23:59:59.000Z

    We present preliminary results of an interferometric study of the water megamaser in the merger system Arp299. This system is composed of two main sources: IC694 and NGC3690. There is clear evidence that most of the water maser emission is associated with the nucleus of the latter, confirming the presence of an optically obscured AGN as previously suggested by X-ray observations. Furthermore, emission arises from the inner regions of IC694, where an OH megamaser is also present. The velocity of the water maser line is blueshifted w.r.t. the optically determined systemic velocity and is consistent with that of the OH megamaser line. This finding might then indicate that both masers are associated with the same (expanding) structure and that, for the first time, strong 22 GHz water and 1.67 GHz OH maser emission has been found to coexist.

  13. Deep Trek Re-configurable Processor for Data Acquisition (RPDA)

    SciTech Connect (OSTI)

    Bruce Ohme; Michael Johnson

    2009-06-30T23:59:59.000Z

    This report summarizes technical progress achieved during the cooperative research agreement between Honeywell and U.S. Department of Energy to develop a high-temperature Re-configurable Processor for Data Acquisition (RPDA). The RPDA development has incorporated multiple high-temperature (225C) electronic components within a compact co-fired ceramic Multi-Chip-Module (MCM) package. This assembly is suitable for use in down-hole oil and gas applications. The RPDA module is programmable to support a wide range of functionality. Specifically this project has demonstrated functional integrity of the RPDA package and internal components, as well as functional integrity of the RPDA configured to operate as a Multi-Channel Data Acquisition Controller. This report reviews the design considerations, electrical hardware design, MCM package design, considerations for manufacturing assembly, test and screening, and results from prototype assembly and characterization testing.

  14. Federal Acquisition Regulation Federal Acquisition Circular 2005-61

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers New Training on Energy ManagementAugustin2012)4 News BlastAcquisition61

  15. Acquisition Guide Chapter 1.1 - Acquisition Regulations System - (March

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter

  16. The vortex merger rate in freely decaying, two-dimensional turbulence J. H. LaCascea

    E-Print Network [OSTI]

    LaCasce, Joseph H.

    vortex models in which energy-conserving mergers were allowed. Trizac19 used a molecular dynamics in laboratory experiments in which vortices were generated by electromagnetic excitation in an electrolyte.10

  17. The NYSE-Archipelago merger : a case study in the evolution of exchange structures

    E-Print Network [OSTI]

    Walker, James F. (James Francis)

    2006-01-01T23:59:59.000Z

    At the time of this writing, the NYSE had just completed its historic merger with Archipelago, LLC, while changing its ownership structure to a public company. The conditions leading up to this transformation are descriptive ...

  18. The rhetoric of the NEA/AFT merger: managing conflicting conceptualizations of identity and democracy

    E-Print Network [OSTI]

    Burkett, Amber Leigh

    1999-01-01T23:59:59.000Z

    After many years of negotiations, the National Education Association and the American Federation of Teachers were poised to merge, but the 1998 Representative Assembly failed to approve this merger. This thesis examines the history and culture...

  19. acquisition

    National Nuclear Security Administration (NNSA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742EnergyOn AprilA Approved:AdministrationAnalysisDarby Dietrich5 | NUMBER643|AboutM05720/%2A en

  20. Sensor Acquisition for Water Utilities: A Survey and Technology List

    SciTech Connect (OSTI)

    Alai, M; Glascoe, L; Love, A; Johnson, M; Einfeld, W

    2005-03-07T23:59:59.000Z

    The early detection of the deliberate biological and chemical contamination of water distribution systems is a necessary capability for securing the nation's water supply. Current and emerging early-detection technology capabilities and shortcomings need to be identified and assessed to provide government agencies and water utilities with an improved methodology for assessing the value of installing these technologies. The Department of Homeland Security (DHS) has tasked a multi-laboratory team to evaluate current and future needs to protect the nation's water distribution infrastructure by supporting an objective evaluation of current and new technologies. The primary deliverables from this Operational Technology Demonstration (OTD) are the following: (1) establishment of an advisory board for review and approval of testing protocols, technology acquisition processes and recommendations for technology test and evaluation in laboratory and field settings; (2) development of a technology acquisition process; (3) creation of laboratory and field testing and evaluation capability; and (4) testing of candidate technologies for insertion into a water early warning system. The initial phase of this study involves the development of two separate but complementary strategies to be reviewed by the advisory board: (1) a technology acquisition strategy, and (2) a technology evaluation strategy. Lawrence Livermore National Laboratory and Sandia National Laboratories are tasked with the first strategy, while Los Alamos, Pacific Northwest, and Oak Ridge National Laboratories are tasked with the second strategy. The first goal of the acquisition strategy is the development of a technology survey process that includes a review of previous sensor surveys and current test programs and then the development of a method to solicit and select existing and emerging sensor technologies for evaluation and testing. In this paper we discuss a survey of previous efforts by governmental agencies and private companies with the aim of facilitating a water sensor technology acquisition procedure. We provide a survey of previous sensor studies with regard to the use of Early Warning Systems (EWS) including earlier surveys, testing programs, and response studies. In the project we extend this earlier work by developing a list of important sensor specifications that are then used to help assemble a sensor selection criteria. A list of sensor technologies with their specifications is appended to this document. This list will assist the second goal of the project which is a recommendation of candidate technologies for laboratory and field testing.

  1. Subsea control and data acquisition

    SciTech Connect (OSTI)

    Not Available

    1990-01-01T23:59:59.000Z

    This book contains papers presented at the conference on subsea control and data acquisition. The tasks performed by subsea control systems, although fairly straightforward, are dominated by an alien environment and the high costs associated with failure and repair. The evolution of systems design has resulted in a growing confidence in equipment reliability. In the future, however, more searching demands may include active regulation of valves and the use of data for reservoir management purposes. The emphasis of the papers is on technical depth and understanding, with particular attention being paid to the science control and data monitoring in relation to the task of hydrocarbon recovery.

  2. Acquisition Guide | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter

  3. Acquisition News | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,April 1, 2015 DOE

  4. Acquisition News | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,April 1, 2015

  5. Acquisition News | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,April 1,

  6. Acquisition Savings Reporting Process Template

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,April 1,Savings

  7. ACQUISITION LETTER | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0 ARRA Newsletters 2010 ARRAA Liquid Layer Solution forA TaleACQUISITION

  8. Acquisition News | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0 ARRA Newsletters 20103-03 AUDITProducts &Acquisition

  9. Sustaninable Acquisition | Department of Energy

    Energy Savers [EERE]

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

  10. Department of Energy (DOE) Acquisition Guide

    Broader source: Energy.gov [DOE]

    Regulatory requirements for the acquisition process are set forth in the Federal Acquisition Regulation (FAR) and are supplemented in the Department of Energy Acquisition Regulation (DEAR). FAR 1.301 provides for the issuance of additional internal agency guidance, including designations and delegations of authority, assignments of responsibilities, work-flow procedures, and internal reporting requirements. The DOE Acquisition Guide serves this purpose by identifying relevant internal standard operating procedures to be followed by both procurement and program personnel who are involved in various aspects of the acquisition process. The Guide also is intended to be a repository of best practices found throughout the agency that reflect specific illustrations of techniques which ' might be helpful to all readers. Additionally, the Guide includes subject matter that was issued previously through other media, such as Acquisition Letters.

  11. A systematic study of carbon-oxygen white dwarf mergers: mass combinations for Type Ia supernovae

    E-Print Network [OSTI]

    Sato, Yushi; Tanikawa, Ataru; Nomoto, Ken'ichi; Maeda, Keiichi; Hachisu, Izumi

    2015-01-01T23:59:59.000Z

    Mergers of two carbon-oxygen (CO) white dwarfs (WDs) have been considered as progenitors of Type Ia supernovae (SNe Ia). Based on smoothed particle hydrodynamics (SPH) simulations, previous studies claimed that mergers of CO WDs lead to an SN Ia explosion either in the dynamical merger phase or stationary rotating merger remnant phase. However, the mass range of CO WDs that lead to an SN Ia has not been clearly identified yet. In the present work, we perform systematic SPH merger simulations for the WD masses ranging from $0.5~M_{\\odot}$ to $1.1~M_{\\odot}$ with higher resolutions than the previous systematic surveys and examine whether or not carbon burning occurs dynamically or quiescently in each phase. We further study the possibility of SN Ia explosion and estimate the mass range of CO WDs that lead to an SN Ia. We found that when the both WDs are massive, i.e., in the mass range of $0.9~M_{\\odot} {\\le} M_{1,2} {\\le} 1.1~M_{\\odot}$, they can explode as an SN Ia in the merger phase. On the other hand, when...

  12. Magnetized Moving Mesh Merger of a Carbon-Oxygen White Dwarf Binary

    E-Print Network [OSTI]

    Zhu, Chenchong; van Kerkwijk, Marten H; Chang, Philip

    2015-01-01T23:59:59.000Z

    White dwarf binary mergers are possible progenitors to a number of unusual stars and transient phenomena, including type Ia supernovae. To date, simulations of mergers have not included magnetic fields, even though they are believed to play a significant role in the evolution of the merger remnant. We simulated a 0.625 - 0.65 $M_{\\odot}$ carbon-oxygen white dwarf binary merger in the magnetohydrodynamic moving mesh code Arepo. Each white dwarf was given an initial dipole field with a surface value of $\\sim10^3$ G. As in simulations of merging double neutron star binaries, we find exponential field growth within Kelvin-Helmholtz instability-generated vortices during the coalescence of the two stars. The final field has complex geometry, and a strength $>10^{10}$ G at the center of the merger remnant. Its energy is $\\sim2\\times10^{47}$ ergs, $\\sim0.2$% of the remnant's total energy. The strong field likely influences further evolution of the merger remnant by providing a mechanism for angular momentum transfer ...

  13. Memorandum for Chief Acquisition Officers, Senior Procurement...

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

    lifecycle and a model interagency agreement to reinforce sound contracting and fiscal practices. The guidance reflects comments provided by Chief Acquisition Officers, Senior...

  14. Omak Creek acquisition protects endangered salmonid habitat ...

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

    to protect habitat for endangered salmon and steelhead along Omak Creek in Okano- gan County. This acquisition would protect spawning, rearing and migratory habitat of...

  15. SND data acquisition system upgrade

    E-Print Network [OSTI]

    A. G. Bogdanchikov; V. P. Druzhinin; A. A. Korol; S. V. Koshuba; A. I. Tekutiev; Yu. V. Usov

    2014-04-02T23:59:59.000Z

    The data acquisition (DAQ) system of the SND detector successfully operated during four data-taking seasons (2010-2013) at the e+e- collider VEPP-2000. Currently the collider is shut down for planned reconstruction, which is expected to increase the VEPP-2000 luminosity and data flow from the SND detector electronics by up to 10 times. Since current DAQ system implementation (electronics and computer part) does not have enough reserve for selection of events in the new environment without compromising quality, there arose the need for the system upgrade. Here we report on the major SND data acquisition system upgrade which includes developing new electronics for digitization and data transfer, complete redesign of the data network, increasing of the DAQ computer farm processing capacity and making the event building process concurrent. These measures will allow us to collect data flow from the most congested detector subsystems in parallel in contrast to the current situation. We would like to discuss also the possibility to implement full software trigger solution in the future.

  16. Growth of Spirals: Secular or Driven by Mergers ?

    E-Print Network [OSTI]

    F. Hammer

    2005-09-30T23:59:59.000Z

    The physical phenomena contributing to the galaxy growth can be tested all the way to z= 1. Galaxy mass, extinction, star formation and gas metal abundance can be measured in a robust way, as well as the distribution of the galaxy morphologies. I discuss here the observational methods and their accuracy. Physical quantities can be evaluated with uncertainties much lower than 0.3 dex, if they are based on 2 sets of independent measurements. For example, at a given IMF, the star formation rate is well estimated by combining flux measurements of the extinction corrected Balmer line and of the mid-IR continuum. Spiral mass growth had occurred from gas accretion and from merging. Gas accretion can explain at most half of the spiral mass growth: at moderate redshift, the numerous population of compact, merger and irregular galaxies requires another origin. A spiral rebuilding scenario is able to reproduce all the evolutionary trends observed since z~1, and could be at the origin of the present-day, numerous population of early type spirals.

  17. Abell 1201: a Minor merger at second core passage

    E-Print Network [OSTI]

    Ma, Cheng-Jiun; Nulsen, Paul E J; McNamara, Brian R; Murray, Stephen S; Couch, Warrick J

    2012-01-01T23:59:59.000Z

    We present an analysis of the structures and dynamics of the merging cluster Abell~1201, which has two sloshing cold fronts around a cooling core, and an offset gas core approximately 500kpc northwest of the center. New Chandra and XMM-Newton data reveal a region of enhanced brightness east of the offset core, with breaks in surface brightness along its boundary to the north and east. This is interpreted as a tail of gas stripped from the offset core. Gas in the offset core and the tail is distinguished from other gas at the same distance from the cluster center chiefly by having higher density, hence lower entropy. In addition, the offset core shows marginally lower temperature and metallicity than the surrounding area. The metallicity in the cool core is high and there is an abrupt drop in metallicity across the southern cold front. We interpret the observed properties of the system, including the placement of the cold fronts, the offset core and its tail in terms of a simple merger scenario. The offset cor...

  18. Modelling ISO Galaxy Counts with Luminosity and Merger Rate Evolution

    E-Print Network [OSTI]

    Nathan Roche; Steve Eales

    1998-12-10T23:59:59.000Z

    We model galaxy evolution in the 6.75 and 15 micron passbands of the ISO satellite, by combining models of galaxy evolution at optical wavelengths (which are consistent with the optical galaxy counts) with observed spectral energy distributions in the infra-red. Our model is consistent with the local 12 micron galaxy luminosity, if 3.5 per cent of spirals at z=0 are in interacting pairs with mid-infra-red luminosities enhanced by major starbursts. Source counts from deep ISO surveys exceed non-evolving predictions but are more consistent with our evolving model. The steep number count of 6.75 micron sources appears to be explained primarily by evolving early-type galaxies, whereas at 15 microns the main contributors are star-forming spirals and starbursting interacting/merging galaxies. The 31 per cent of 15 micron sources which are visibly interacting galaxies have high mid-infra-red/optical flux ratios indicating major starbursts combined with dust extinction. The numbers and high mean redshift of these sources suggest the merger-starbursts are increasing in luminosity with redshift, approximately as (1+z)^2, in addition to undergoing (1+z)^2 number evolution reflecting the optically observed increase with redshift in the fraction of interacting galaxies.

  19. Europium production: neutron star mergers versus core-collapse supernovae

    E-Print Network [OSTI]

    Matteucci, F; Arcones, A; Korobkin, O; Rosswog, S

    2013-01-01T23:59:59.000Z

    We have explored the Eu production in the Milky Way by means of a very detailed chemical evolution model. In particular, we have assumed that Eu is formed in merging neutron star (or neutron star black hole) binaries as well as in type II supernovae. We have tested the effects of several important parameters influencing the production of Eu during the merging of two neutron stars, such as: i) the time scale of coalescence, ii) the Eu yields and iii) the range of initial masses for the progenitors of the neutron stars. The yields of Eu from type II supernovae are very uncertain, more than those from coalescing neutron stars, so we have explored several possibilities. We have compared our model results with the observed rate of coalescence of neutron stars, the solar Eu abundance, the [Eu/Fe] versus [Fe/H] relation in the solar vicinity and the [Eu/H] gradient along the Galactic disc. Our main results can be summarized as follows: i) neutron star mergers can be entirely responsible for the production of Eu in t...

  20. Extreme Galactic-Winds and Starburst in IR Mergers and IR QSOs

    E-Print Network [OSTI]

    S. Lipari; D. Sanders; R. Terlevich; S. Veilleux; R. Diaz; Y. Taniguchi; W. Zheng; D. Kim; Z. Tsvetanov; G. Carranza; H. Dottori

    2000-07-20T23:59:59.000Z

    We report -as a part of a long-term study of mergers and IR QSOs- detailed spectroscopic evidences for outflow (OF) and/or Wolf Rayet features in: (i) low velocity OF in the ongoing mergers NGC 4038/39 and IRAS 23128-5919; (ii) extreme velocity OF (EVOF) in the QSOs IRAS 01003-2238 and IRAS 13218+0552; (iii) OF and EVOF in a complete sample of ultra-luminous IR galaxies/QSOs ("The IRAS 1 Jy MKO-KPNO Survey", of 118 objects). We found EVOF in IRAS 11119+3257, 14394+5332, 15130+1958 and 15462-0450. The OF components detected in these objects were mainly associated to starburst processes: i.e., to galactic-winds generated in multiple type II SN explosions and massive stars. The EVOF were detected in objects with strong starburst plus obscured IR QSOs; which suggest that interaction of both processes could generate EVOF. In addition, we analyze the presence of Wolf Rayet features in the large sample of Bright PG-QSOs (Boroson and Green 1992), and nearby mergers and galactic-wind galaxies. We found clear WR features in the Fe II QSOs (type I): PG 1244+026, 1444+407, 1448+273, 1535+547; and in the IR merger Arp 220. HST archive images of IR+BAL QSOs show in practically all of these objects "arc or shell" features probably associated to galactic-winds (i.e., to multiple type II SN explosions) and/or merger processes. Finally, we discuss the presence of extreme starburst and galactic wind as a possible evolutive link between IR merger and IR QSOs; where the relation between mergers and extreme starburst (with powerful galactic-winds) plays in important role, in the evolution of galaxies.

  1. Numerical relativity simulations of neutron star merger remnants using conservative mesh refinement

    E-Print Network [OSTI]

    Tim Dietrich; Sebastiano Bernuzzi; Maximiliano Ujevic; Bernd Bruegmann

    2015-04-06T23:59:59.000Z

    We study equal and unequal-mass neutron star mergers by means of new numerical relativity simulations in which the general relativistic hydrodynamics solver employs an algorithm that guarantees mass conservation across the refinement levels of the computational mesh. We consider eight binary configurations with total mass $M=2.7\\,M_\\odot$, mass-ratios $q=1$ and $q=1.16$, and four different equation of states (EOSs), and one configuration with a stiff EOS, $M=2.5M_\\odot$ and $q=1.5$. We focus on the post-merger dynamics and study the merger remnant, dynamical ejecta and the postmerger gravitational wave spectrum. Although most of the merger remnants form a hypermassive neutron star collapsing to a black hole+disk system on dynamical timescales, stiff EOSs can eventually produce a stable massive neutron star. Ejecta are mostly emitted around the orbital plane; favored by large mass ratios and softer EOS. The postmerger wave spectrum is mainly characterized by non-axisymmetric oscillations of the remnant. The stiff EOS configuration consisting of a $1.5M_\\odot$ and a $1.0M_\\odot$ neutron star shows a rather peculiar dynamics. During merger the companion star is very deformed; about~$\\sim0.03M_\\odot$ of rest-mass becomes unbound from the tidal tail due torque; and the merger remnant forms stable neutron star surrounded by a massive accretion disk $\\sim0.3M_\\odot$. Similar configurations might be particularly interesting for electromagnetic counterparts. Comparing results obtained with and without the conservative mesh refinement algorithm, we find that post-merger simulations can be affected by systematic errors if mass conservation is not enforced in the mesh refinement strategy. However, mass conservation also depends on grid details and on the artificial atmosphere setup. [abridged

  2. Foundations of Artificial Intelligence Knowledge Acquisition

    E-Print Network [OSTI]

    Qu, Rong

    knowledge acquisition and knowledge engineering. To explain how knowledge is taken from a human before being of knowledge engineering can be defined as the process of assessing problems, acquiring knowledge and building knowledge based systems. Knowledge Engineering Problem assessment Data and knowledge acquisition Bottleneck

  3. New online signature acquisition system Adel Oulefki

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    involve the following operations: · Dynamic signature acquisition. · Data pretreatment (adapted, they are relatively more expensive and require more dedicated material for the exploitation of acquired data. Other types of acquisition systems based on a data glove (conceived initially for virtual reality) have also

  4. "Supervisory Control and Data Acquisition (SCADA) Systems." The...

    Energy Savers [EERE]

    "Supervisory Control and Data Acquisition (SCADA) Systems." The CIP Report. Vol 7 No 8 "Supervisory Control and Data Acquisition (SCADA) Systems." The CIP Report. Vol 7 No 8...

  5. Model Acquisition Language for Energy-Efficient Product Contracts...

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

    Technologies Energy-Efficient Products Model Acquisition Language for Energy-Efficient Product Contracts Model Acquisition Language for Energy-Efficient Product Contracts...

  6. POLICY GUIDANCE MEMORANDUM #09A Direct Hire Authority for Acquisition...

    Office of Environmental Management (EM)

    9A Direct Hire Authority for Acquisition Positions (Expired) POLICY GUIDANCE MEMORANDUM 09A Direct Hire Authority for Acquisition Positions (Expired) THIS GUIDANCE HAS EXPIRED...

  7. DOE Acquisition and Project Management (APM) Glossary of Terms...

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

    DOE Acquisition and Project Management (APM) Glossary of Terms Handbook FINAL VERSION 9-30-2014 DOE Acquisition and Project Management (APM) Glossary of Terms Handbook FINAL...

  8. Program & Project Management For The Acquisition Of Capital Assets...

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

    Program & Project Management For The Acquisition Of Capital Assets Program & Project Management For The Acquisition Of Capital Assets Project Assessment and Reporting...

  9. POLICY FLASH 2015-22 - Federal Acquisition Regulation Class Deviation...

    Energy Savers [EERE]

    POLICY FLASH 2015-22 - Federal Acquisition Regulation Class Deviation POLICY FLASH 2015-22 - Federal Acquisition Regulation Class Deviation DATE: May 8, 2015 TO: Procurement...

  10. Meeting the Challenge: Integrating Acquisition and Project Management...

    Energy Savers [EERE]

    Meeting the Challenge: Integrating Acquisition and Project Management - J. E. Surash, P.E. Meeting the Challenge: Integrating Acquisition and Project Management - J. E. Surash,...

  11. acquisition data: Topics by E-print Network

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

    H. Richter, R. Kleber, M. Ohlenroth acquisition purposes commercially available SCI Zachmann, Gabriel 16 Electronic Blocks for Multichannel Data Acquisition Systems CERN...

  12. acquisition system proposal: Topics by E-print Network

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

    H. Richter, R. Kleber, M. Ohlenroth acquisition purposes commercially available SCI Zachmann, Gabriel 10 Data Acquisition System for the UFFO Pathfinder CERN Preprints Summary:...

  13. acquisition system development: Topics by E-print Network

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

    H. Richter, R. Kleber, M. Ohlenroth acquisition purposes commercially available SCI Zachmann, Gabriel 23 Data Acquisition System for the UFFO Pathfinder CERN Preprints Summary:...

  14. acquisition system status: Topics by E-print Network

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

    H. Richter, R. Kleber, M. Ohlenroth acquisition purposes commercially available SCI Zachmann, Gabriel 10 Data Acquisition System for the UFFO Pathfinder CERN Preprints Summary:...

  15. acquisition misa system: Topics by E-print Network

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

    H. Richter, R. Kleber, M. Ohlenroth acquisition purposes commercially available SCI Zachmann, Gabriel 11 Data Acquisition System for the UFFO Pathfinder CERN Preprints Summary:...

  16. acquisition computer network: Topics by E-print Network

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

    H. Richter, R. Kleber, M. Ohlenroth acquisition purposes commercially available SCI Zachmann, Gabriel 15 Model-Driven Data Acquisition in Sensor Networks CiteSeer Summary:...

  17. DOE to Resume Filling Strategic Petroleum Reserve: Oil Acquisition...

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

    to Resume Filling Strategic Petroleum Reserve: Oil Acquisition Slated for 2009 DOE to Resume Filling Strategic Petroleum Reserve: Oil Acquisition Slated for 2009 January 2, 2009 -...

  18. Idaho Spent Fuel Facility (ISFF) Project, Appropriate Acquisition...

    Office of Environmental Management (EM)

    Idaho Spent Fuel Facility (ISFF) Project, Appropriate Acquisition Strategy Lessons Learned Report, NNSA, Feb 2010 Idaho Spent Fuel Facility (ISFF) Project, Appropriate Acquisition...

  19. Black Holes in Galaxy Mergers: Evolution of Quasars

    E-Print Network [OSTI]

    Philip F. Hopkins; Lars Hernquist; Thomas J. Cox; Tiziana Di Matteo; Paul Martini; Brant Robertson; Volker Springel

    2005-06-13T23:59:59.000Z

    Based on numerical simulations of gas-rich galaxy mergers, we discuss a model in which quasar activity is tied to the self-regulated growth of supermassive black holes in galaxies. Nuclear inflow of gas attending a galaxy collision triggers a starburst and feeds black hole growth, but for most of the duration of the starburst, the black hole is heavily obscured by surrounding gas and dust which limits the visibility of the quasar, especially at optical and UV wavelengths. Eventually, feedback energy from accretion heats the gas and expels it in a powerful wind, leaving a 'dead quasar'. Between buried and dead phases there is a window during which the galaxy would be seen as a luminous quasar. Because the black hole mass, radiative output, and distribution of obscuring gas and dust all evolve strongly with time, the duration of this phase of observable quasar activity depends on both the waveband and imposed luminosity threshold. We determine the observed and intrinsic lifetimes as a function of luminosity and frequency, and calculate observable lifetimes ~10 Myr for bright quasars in the optical B-band, in good agreement with empirical estimates and much smaller than the black hole growth timescales ~100 Myr, naturally producing a substantial population of 'buried' quasars. However, observed and intrinsic energy outputs converge in the IR and hard X-ray bands as attenuation becomes weaker and chances of observation greatly increase. We obtain the distribution of column densities along sightlines in which the quasar is seen above a given luminosity, and find that our result agrees remarkably well with observed estimates of the column density distribution from the SDSS for appropriate luminosity thresholds. (Abridged)

  20. Status Report: EM Acquisition and Project Management Review

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2Uranium Transferon the Passing of Admiral James D. Watkins Statement onReport:

  1. Mergers of galaxies in clusters: Monte Carlo simulation of mass and angular momentum distribution

    E-Print Network [OSTI]

    D. S. Krivitsky; V. M. Kontorovich

    1997-03-04T23:59:59.000Z

    A Monte Carlo simulation of mergers in clusters of galaxies is carried out. An ``explosive'' character of the merging process (an analog of phase transition), suggested earlier by Cavaliere et al. (1991), Kontorovich et al. (1992), is confirmed. In particular, a giant object similar to cD-galaxy is formed in a comparatively short time as a result of mergers. Mass and angular momentum distribution function for galaxies is calculated. An intermediate asymptotics of the mass function is close to a power law with the exponent $\\alpha\\approx2$. It may correspond to recent observational data for steep faint end of the luminosity function. The angular momentum distribution formed by mergers is close to Gaussian, the rms dimensionless angular momentum $S/(GM^3R)^{1/2}$ being approximately independent of mass, which is in accordance with observational data.

  2. Radio Flares of Compact Binary Mergers: the Effect of Non-Trivial Outflow Geometry

    E-Print Network [OSTI]

    Margalit, Ben

    2015-01-01T23:59:59.000Z

    The next generation gravitational waves (GW) detectors are most sensitive to GW emitted by compact (neutron star/black hole) binary mergers. If one of those is a neutron star the merger will also emit electromagnetic radiation via three possible channels: Gamma-ray bursts and their (possibly orphan) afterglows (Eichler et al. 1989), Li-Paczynski Macronovae (Li & Paczynski 1998) and radio flares (Nakar & Piran 2011). This accompanying electromagnetic radiation is vitally important in confirming the GW detections (Kochanek & Piran 1993). It could also reveal a wealth of information regarding the merger and will open a window towards multi-messenger astronomy. Identifying and characterizing these counterparts is therefore of utmost importance. In this work we explore late time radio flares emitted by the dynamically ejected outflows. We build upon previous work and consider the effect of the outflow's non-trivial geometry. Using an approximate method we estimate the radio light-curves for several eje...

  3. Realistic fission model and the r-process in neutron star mergers

    SciTech Connect (OSTI)

    Shibagaki, S.; Kajino, T. [Department of Astronomy, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan and National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Chiba, S. [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8850 (Japan); Mathews, G. J. [Center for Astrophysics, Department of Physics, University of Notre Dame, IN 46556, U.S.A. and National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan)

    2014-05-09T23:59:59.000Z

    About half of heavy elements are considered to be produced by the rapid neutron-capture process, r-process. The neutron star merger is one of the viable candidates for the astrophysical site of r-process nucleosynthesis. Nuclear fission reactions play an important role in the r-process of neutron star mergers. However theoretical predictions about fission properties of neutron-rich nuclei have some uncertainties. Especially, their fission fragment distributions are totally unknown and the phenomenologically extrapolated distribution was often applied to nucleosynthesis calculations. In this study, we have carried out r-process nucleosynthesis calculations based upon new theoretical estimates of fission fragment distributions. We discuss the effects on the r-process in neutron star mergers from the nuclear fission of heavy neutron-rich actinide elements. We also discuss how variations in the fission fragment distributions affect the abundance pattern.

  4. Search for gravitational waves from binary black hole inspiral, merger and ringdown

    E-Print Network [OSTI]

    The LIGO Scientific Collaboration; the Virgo Collaboration; J. Abadie; B. P. Abbott; R. Abbott; M. Abernathy; T. Accadia; F. Acernese; C. Adams; R. Adhikari; P. Ajith; B. Allen; G. S. Allen; E. Amador Ceron; R. S. Amin; S. B. Anderson; W. G. Anderson; F. Antonucci; M. A. Arain; M. C. Araya; M. Aronsson; Y. Aso; S. M. Aston; P. Astone; D. Atkinson; P. Aufmuth; C. Aulbert; S. Babak; P. Baker; G. Ballardin; T. Ballinger; S. Ballmer; D. Barker; S. Barnum; F. Barone; B. Barr; P. Barriga; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; M. Bastarrika; J. Bauchrowitz; Th. S. Bauer; B. Behnke; M. G. Beker; A. Belletoile; M. Benacquista; A. Bertolini; J. Betzwieser; N. Beveridge; P. T. Beyersdorf; I. A. Bilenko; G. Billingsley; J. Birch; S. Birindelli; R. Biswas; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; B. Bland; M. Blom; C. Boccara; O. Bock; T. P. Bodiya; R. Bondarescu; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; B. Bouhou; M. Boyle; S. Braccini; C. Bradaschia; P. R. Brady; V. B. Braginsky; J. E. Brau; J. Breyer; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; R. Budzy?ski; T. Bulik; H. J. Bulten; A. Buonanno; J. Burguet-Castell; O. Burmeister; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; J. Cain; E. Calloni; J. B. Camp; E. Campagna; P. Campsie; J. Cannizzo; K. Cannon; B. Canuel; J. Cao; C. Capano; F. Carbognani; S. Caride; S. Caudill; M. Cavaglia`; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; O. Chaibi; T. Chalermsongsak; E. Chalkley; P. Charlton; E. Chassande-Mottin; S. Chelkowski; Y. Chen; A. Chincarini; N. Christensen; S. S. Y. Chua; C. T. Y. Chung; D. Clark; J. Clark; J. H. Clayton; F. Cleva; E. Coccia; C. N. Colacino; J. Colas; A. Colla; M. Colombini; R. Conte; D. Cook; T. R. Corbitt; N. Cornish; A. Corsi; C. A. Costa; J. -P. Coulon; D. M. Coward; D. C. Coyne; J. D. E. Creighton; T. D. Creighton; A. M. Cruise; R. M. Culter; A. Cumming; L. Cunningham; E. Cuoco; K. Dahl; S. L. Danilishin; R. Dannenberg; S. D'Antonio; K. Danzmann; K. Das; V. Dattilo; B. Daudert; M. Davier; G. Davies; A. Davis; E. J. Daw; R. Day; T. Dayanga; R. De Rosa; D. DeBra; G. Debreczeni; J. Degallaix; M. del Prete; V. Dergachev; R. DeRosa; R. DeSalvo; P. Devanka; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; M. Di Paolo Emilio; A. Di Virgilio; M. Díaz; A. Dietz; F. Donovan; K. L. Dooley; E. E. Doomes; S. Dorsher; E. S. D. Douglas; M. Drago; R. W. P. Drever; J. C. Driggers; J. Dueck; J. -C. Dumas; T. Eberle; M. Edgar; M. Edwards; A. Effler; P. Ehrens; G. Ely; R. Engel; T. Etzel; M. Evans; T. Evans; V. Fafone; S. Fairhurst; Y. Fan; B. F. Farr; D. Fazi; H. Fehrmann; D. Feldbaum; I. Ferrante; F. Fidecaro; L. S. Finn; I. Fiori; R. Flaminio; M. Flanigan; K. Flasch; S. Foley; C. Forrest; E. Forsi; L. A. Forte; N. Fotopoulos; J. -D. Fournier; J. Franc; S. Frasca; F. Frasconi; M. Frede; M. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; D. Friedrich; P. Fritschel; V. V. Frolov; P. Fulda; M. Fyffe; M. Galimberti; L. Gammaitoni; J. A. Garofoli; F. Garufi; M. E. Gáspár; G. Gemme; E. Genin; A. Gennai; I. Gholami; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; C. Gill; E. Goetz; L. M. Goggin; G. González; M. L. Gorodetsky; S. Goßler; R. Gouaty; C. Graef; M. Granata; A. Grant; S. Gras; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Greverie; R. Grosso; H. Grote; S. Grunewald; G. M. Guidi; E. K. Gustafson; R. Gustafson; B. Hage; P. Hall; J. M. Hallam; D. Hammer; G. Hammond; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; K. Haughian; K. Hayama; J. -F. Hayau; T. Hayler; J. Heefner; H. Heitmann; P. Hello; I. S. Heng; A. W. Heptonstall; M. Hewitson; S. Hild; E. Hirose; D. Hoak; K. A. Hodge; K. Holt; D. J. Hosken; J. Hough; E. J. Howell; D. Hoyland; D. Huet; B. Hughey; S. Husa; S. H. Huttner; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; P. Jaranowski; W. W. Johnson; D. I. Jones; G. Jones; R. Jones; L. Ju; P. Kalmus; V. Kalogera; S. Kandhasamy; J. B. Kanner; E. Katsavounidis; K. Kawabe; S. Kawamura; F. Kawazoe; W. Kells; D. G. Keppel; A. Khalaidovski; F. Y. Khalili; E. A. Khazanov; H. Kim; P. J. King; D. L. Kinzel; J. S. Kissel; S. Klimenko; V. Kondrashov; R. Kopparapu; S. Koranda; I. Kowalska; D. Kozak; T. Krause; V. Kringel; S. Krishnamurthy; B. Krishnan; A. Królak; G. Kuehn; J. Kullman; R. Kumar; P. Kwee; M. Landry; M. Lang; B. Lantz; N. Lastzka; A. Lazzarini; P. Leaci; J. Leong; I. Leonor; N. Leroy; N. Letendre; J. Li; T. G. F. Li; N. Liguori; H. Lin; P. E. Lindquist; N. A. Lockerbie; D. Lodhia; M. Lorenzini; V. Loriette; M. Lormand; G. Losurdo; P. Lu; J. Luan; M. Lubinski; A. Lucianetti; H. Lück; A. D. Lundgren; B. Machenschalk; M. MacInnis; M. Mageswaran; K. Mailand; E. Majorana

    2011-02-18T23:59:59.000Z

    We present the first modeled search for gravitational waves using the complete binary black hole gravitational waveform from inspiral through the merger and ringdown for binaries with negligible component spin. We searched approximately 2 years of LIGO data taken between November 2005 and September 2007 for systems with component masses of 1-99 solar masses and total masses of 25-100 solar masses. We did not detect any plausible gravitational-wave signals but we do place upper limits on the merger rate of binary black holes as a function of the component masses in this range. We constrain the rate of mergers for binary black hole systems with component masses between 19 and 28 solar masses and negligible spin to be no more than 2.0 per Mpc^3 per Myr at 90% confidence.

  5. Spiral Disk Instability Can Drive Thermonuclear Explosions in Binary White Dwarf Mergers

    E-Print Network [OSTI]

    Kashyap, Rahul; García-Berro, Enrique; Aznar-Siguán, Gabriela; Ji, Suoqing; Lorén-Aguilar, Pablo

    2015-01-01T23:59:59.000Z

    Thermonuclear, or Type Ia supernovae (SNe Ia), originate from the explosion of carbon-oxygen white dwarfs, and serve as standardizable cosmological candles. However, despite their importance, the nature of the progenitor systems which give rise to SNe Ia has not been hitherto elucidated. Observational evidence favors the double-degenerate channel, in which merging white dwarf binaries lead to SNe Ia. Furthermore, significant discrepancies exist between observations and theory, and to date, there has been no self-consistent merger model which yields a SNe Ia. Here we show that a spiral mode instability in the accretion disk formed during a binary white dwarf merger leads to a detonation on a dynamical timescale. This mechanism sheds light on how white dwarf mergers may frequently yield SNe Ia.

  6. Evaluation of Resource Acquisition Approaches : Final Report.

    SciTech Connect (OSTI)

    O`Neill, Maura L.; Mortimer, Tom; Palermini, Debbi; Nelson, Kari

    1991-09-12T23:59:59.000Z

    Over the last few years, Bonneville has been addressing this need and has developed numerous ways of acquiring resources. Four of these Approaches, the Competitive Acquisition, Billing Credits, and Targeted Acquisition Programs, and the Cowlitz Falls Hydroelectric Project, were the subject of this evaluation project. Each Approach is currently in different stages of a process, and Bonneville felt it was an appropriate time that an evaluation be conducted. The purpose of this evaluation is to analyze the various Approaches` processes, to learn what`s working and what`s not, and to offer recommendations as to how Bonneville might improve their resources acquisition efforts. The evaluation was conducted with no preconceived biases.

  7. TFTR diagnostic control and data acquisition system

    SciTech Connect (OSTI)

    Sauthoff, N.R.; Daniels, R.E.; PPL Computer Division

    1985-05-01T23:59:59.000Z

    General computerized control and data-handling support for TFTR diagnostics is presented within the context of the Central Instrumentation, Control and Data Acquisition (CICADA) System. Procedures, hardware, the interactive man--machine interface, event-driven task scheduling, system-wide arming and data acquisition, and a hierarchical data base of raw data and results are described. Similarities in data structures involved in control, monitoring, and data acquisition afford a simplification of the system functions, based on ''groups'' of devices. Emphases and optimizations appropriate for fusion diagnostic system designs are provided. An off-line data reduction computer system is under development.

  8. A data acquisition architecture for the SSC

    SciTech Connect (OSTI)

    Partridge, R.

    1990-01-01T23:59:59.000Z

    An SSC data acquisition architecture applicable to high-p{sub T} detectors is described. The architecture is based upon a small set of design principles that were chosen to simplify communication between data acquisition elements while providing the required level of flexibility and performance. The architecture features an integrated system for data collection, event building, and communication with a large processing farm. The interface to the front end electronics system is also discussed. A set of design parameters is given for a data acquisition system that should meet the needs of high-p{sub T} detectors at the SSC.

  9. Multiple channel data acquisition system

    DOE Patents [OSTI]

    Crawley, H. Bert (Ames, IA); Rosenberg, Eli I. (Ames, IA); Meyer, W. Thomas (Ames, IA); Gorbics, Mark S. (Ames, IA); Thomas, William D. (Boone, IA); McKay, Roy L. (Ames, IA); Homer, Jr., John F. (Ames, IA)

    1990-05-22T23:59:59.000Z

    A multiple channel data acquisition system for the transfer of large amounts of data from a multiplicity of data channels has a plurality of modules which operate in parallel to convert analog signals to digital data and transfer that data to a communications host via a FASTBUS. Each module has a plurality of submodules which include a front end buffer (FEB) connected to input circuitry having an analog to digital converter with cache memory for each of a plurality of channels. The submodules are interfaced with the FASTBUS via a FASTBUS coupler which controls a module bus and a module memory. The system is triggered to effect rapid parallel data samplings which are stored to the cache memories. The cache memories are uploaded to the FEBs during which zero suppression occurs. The data in the FEBs is reformatted and compressed by a local processor during transfer to the module memory. The FASTBUS coupler is used by the communications host to upload the compressed and formatted data from the module memory. The local processor executes programs which are downloaded to the module memory through the FASTBUS coupler.

  10. Multiple channel data acquisition system

    DOE Patents [OSTI]

    Crawley, H.B.; Rosenberg, E.I.; Meyer, W.T.; Gorbics, M.S.; Thomas, W.D.; McKay, R.L.; Homer, J.F. Jr.

    1990-05-22T23:59:59.000Z

    A multiple channel data acquisition system for the transfer of large amounts of data from a multiplicity of data channels has a plurality of modules which operate in parallel to convert analog signals to digital data and transfer that data to a communications host via a FASTBUS. Each module has a plurality of submodules which include a front end buffer (FEB) connected to input circuitry having an analog to digital converter with cache memory for each of a plurality of channels. The submodules are interfaced with the FASTBUS via a FASTBUS coupler which controls a module bus and a module memory. The system is triggered to effect rapid parallel data samplings which are stored to the cache memories. The cache memories are uploaded to the FEBs during which zero suppression occurs. The data in the FEBs is reformatted and compressed by a local processor during transfer to the module memory. The FASTBUS coupler is used by the communications host to upload the compressed and formatted data from the module memory. The local processor executes programs which are downloaded to the module memory through the FASTBUS coupler. 25 figs.

  11. Modularity as an enabler for evolutionary acquisition

    E-Print Network [OSTI]

    Shah, Nirav Bharat, 1979-

    2004-01-01T23:59:59.000Z

    The end of the cold war witnessed several significant changes in the defense acquisition environment. Budgets declined and the scope of mission expanded. At first, the DoD did not respond well to these pressures resulting ...

  12. Modelling the acquisition of natural language categories 

    E-Print Network [OSTI]

    Fountain, Trevor Michael

    2013-07-02T23:59:59.000Z

    The ability to reason about categories and category membership is fundamental to human cognition, and as a result a considerable amount of research has explored the acquisition and modelling of categorical structure from ...

  13. Energy Systems Acquisitions Advisory Board Procedures

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

    1997-10-28T23:59:59.000Z

    The Notice streamlines the Energy Systems Acquisition Advisory Board (ESAAB) process to ensure informed, objective, and documented Strategic and Major System Critical Decision, Baseline Change Proposal, and site selection final decisions. Does not cancel other directives.

  14. Article semantics in second language acquisition

    E-Print Network [OSTI]

    Ionin, Tania

    2003-01-01T23:59:59.000Z

    This thesis examines article choice and parameter-setting in second language (L2) acquisition. It argues, on the basis of L2-English elicitation and production data, that L2- learners have access to UG-based semantic ...

  15. Antitrust Evaluation of Horizontal Mergers: An Economic Alternative to Market Definition

    E-Print Network [OSTI]

    Sadoulet, Elisabeth

    Antitrust Evaluation of Horizontal Mergers: An Economic Alternative to Market Definition 25 between the two firm's products. We argue that our approach is well grounded in economics, workable, Economics and Regulation at Northwestern University and the FTC First Annual Microeconomic Conference

  16. Short gamma-ray bursts from binary neutron star mergers in globular clusters

    E-Print Network [OSTI]

    Loss, Daniel

    ARTICLES Short gamma-ray bursts from binary neutron star mergers in globular clusters JONATHAN@cfa.harvard.edu Published online: 29 January 2006; doi:10.1038/nphys214 Observations by the Swift gamma-ray-burst (GRB, the so-called `long' GRBs (>2-200 s) were located by coded aperture imaging of their hard X-ray emission

  17. Edition No 18 May 2006 Merger of Mechanical Engineering and Aeronautics

    E-Print Network [OSTI]

    ME News Edition No 18 ­ May 2006 Merger of Mechanical Engineering and Aeronautics Mechanical Engineering and Aeronautics have been asked by Julia King, Principal of the Faculty of Engineering, to develop models for a combined Mechanical Engineering and Aeronautics Department. Congratulations to Thomas

  18. Simulation of vortex sheet roll-up: chaos, azimuthal waves, ring merger

    E-Print Network [OSTI]

    Krasny, Robert

    Simulation of vortex sheet roll-up: chaos, azimuthal waves, ring merger Robert KRASNY1 , Keith-1109 USA krasny@umich.edu National Center for Atmospheric Research, Climate andGlobal Dynamics Boulder, axisymmetric, and three- dimensional flow Krasny &Nitsche 2001; Lindsay & Krasny 2001. Vor- tex sheet

  19. Prefetching on the Web Through Merger of Client and Server Profiles

    E-Print Network [OSTI]

    Wills, Craig E.

    Prefetching on the Web Through Merger of Client and Server Profiles Craig E. Wills and Joel Sommers look at the idea of merging client and server profiles for enhanced performance through prefetching builds on previous server profile work, but goes much further in defining client profiles, showing how

  20. Accretion disks around binary black holes of unequal mass: GRMHD simulations of postdecoupling and merger

    E-Print Network [OSTI]

    Roman Gold; Vasileios Paschalidis; Milton Ruiz; Stuart L. Shapiro; Zachariah B. Etienne; Harald P. Pfeiffer

    2014-12-03T23:59:59.000Z

    We report results from simulations in general relativity of magnetized disks accreting onto merging black hole binaries, starting from relaxed disk initial data. The simulations feature an effective, rapid radiative cooling scheme as a limiting case of future treatments with radiative transfer. Here we evolve the systems after binary-disk decoupling through inspiral and merger, and analyze the dependence on the binary mass ratio with $q\\equiv m_{\\rm bh}/M_{\\rm BH}=1,1/2,$ and $1/4$. We find that the luminosity associated with local cooling is larger than the luminosity associated with matter kinetic outflows, while the electromagnetic (Poynting) luminosity associated with bulk transport of magnetic field energy is the smallest. The cooling luminosity around merger is only marginally smaller than that of a single, non-spinning black hole. Incipient jets are launched independently of the mass ratio, while the same initial disk accreting on a single non-spinning black hole does not lead to a jet, as expected. For all mass ratios we see a transient behavior in the collimated, magnetized outflows lasting $2-5 ( M/10^8M_\\odot ) \\rm days$ after merger: the outflows become increasingly magnetically dominated and accelerated to higher velocities, boosting the Poynting luminosity. These sudden changes can alter the electromagnetic emission across the jet and potentially help distinguish mergers of black holes in AGNs from single accreting black holes based on jet morphology alone.

  1. Comments on the use of computer models for merger analysis in the electricity industry

    E-Print Network [OSTI]

    California at Berkeley. University of

    that the commission is considering, electricity market models, production cost/optimal power flow models, and hybridsComments on the use of computer models for merger analysis in the electricity industry FERC Docket for market power in electricity markets. These analyses have yielded several insights about the application

  2. The Influence of Thermal Pressure on Equilibrium Models of Hypermassive Neutron Star Merger Remnants

    E-Print Network [OSTI]

    J. D. Kaplan; C. D. Ott; E. P. O'Connor; K. Kiuchi; L. Roberts; M. Duez

    2014-06-01T23:59:59.000Z

    The merger of two neutron stars leaves behind a rapidly spinning hypermassive object whose survival is believed to depend on the maximum mass supported by the nuclear equation of state, angular momentum redistribution by (magneto-)rotational instabilities, and spindown by gravitational waves. The high temperatures (~5-40 MeV) prevailing in the merger remnant may provide thermal pressure support that could increase its maximum mass and, thus, its life on a neutrino-cooling timescale. We investigate the role of thermal pressure support in hypermassive merger remnants by computing sequences of spherically-symmetric and axisymmetric uniformly and differentially rotating equilibrium solutions to the general-relativistic stellar structure equations. Using a set of finite-temperature nuclear equations of state, we find that hot maximum-mass critically spinning configurations generally do not support larger baryonic masses than their cold counterparts. However, subcritically spinning configurations with mean density of less than a few times nuclear saturation density yield a significantly thermally enhanced mass. Even without decreasing the maximum mass, cooling and other forms of energy loss can drive the remnant to an unstable state. We infer secular instability by identifying approximate energy turning points in equilibrium sequences of constant baryonic mass parametrized by maximum density. Energy loss carries the remnant along the direction of decreasing gravitational mass and higher density until instability triggers collapse. Since configurations with more thermal pressure support are less compact and thus begin their evolution at a lower maximum density, they remain stable for longer periods after merger.

  3. Estimation of cost synergies from mergers without cost data: Application to U.S. radio

    E-Print Network [OSTI]

    Niebur, Ernst

    Estimation of cost synergies from mergers without cost data: Application to U.S. radio Przemyslaw without using actual data on cost. The estimator uses a structural model in which companies play a dynamic for cost data. It turns out that between 1996 and 2006 additional ownership concentration generated $2.5b

  4. Updated NGNP Fuel Acquisition Strategy

    SciTech Connect (OSTI)

    David Petti; Tim Abram; Richard Hobbins; Jim Kendall

    2010-12-01T23:59:59.000Z

    A Next Generation Nuclear Plant (NGNP) fuel acquisition strategy was first established in 2007. In that report, a detailed technical assessment of potential fuel vendors for the first core of NGNP was conducted by an independent group of international experts based on input from the three major reactor vendor teams. Part of the assessment included an evaluation of the credibility of each option, along with a cost and schedule to implement each strategy compared with the schedule and throughput needs of the NGNP project. While credible options were identified based on the conditions in place at the time, many changes in the assumptions underlying the strategy and in externalities that have occurred in the interim requiring that the options be re-evaluated. This document presents an update to that strategy based on current capabilities for fuel fabrication as well as fuel performance and qualification testing worldwide. In light of the recent Pebble Bed Modular Reactor (PBMR) project closure, the Advanced Gas Reactor (AGR) fuel development and qualification program needs to support both pebble and prismatic options under the NGNP project. A number of assumptions were established that formed a context for the evaluation. Of these, the most important are: • Based on logistics associated with the on-going engineering design activities, vendor teams would start preliminary design in October 2012 and complete in May 2014. A decision on reactor type will be made following preliminary design, with the decision process assumed to be completed in January 2015. Thus, no fuel decision (pebble or prismatic) will be made in the near term. • Activities necessary for both pebble and prismatic fuel qualification will be conducted in parallel until a fuel form selection is made. As such, process development, fuel fabrication, irradiation, and testing for pebble and prismatic options should not negatively influence each other during the period prior to a decision on reactor type. • Additional funding will be made available beginning in fiscal year (FY) 2012 to support pebble bed fuel fabrication process development and fuel testing while maintaining the prismatic fuel schedule. Options for fuel fabrication for prismatic and pebble bed were evaluated based on the credibility of each option, along with a cost and schedule to implement each strategy. The sole prismatic option is Babcock and Wilcox (B&W) producing uranium oxycarbide (UCO) tristructural-isotropic (TRISO) fuel particles in compacts. This option finishes in the middle of 2022 . Options for the pebble bed are Nuclear Fuel Industries (NFI) in Japan producing uranium dioxide (UO2) TRISO fuel particles, and/or B&W producing UCO or UO2 TRISO fuel particles. All pebble options finish in mid to late 2022.

  5. The rise and fall of stellar discs across the peak of cosmic star formation history: mergers versus smooth accretion

    E-Print Network [OSTI]

    Welker, Charlotte; Devriendt, Julien; Pichon, Christophe; Kaviraj, Sugata; Peirani, Sebastien

    2015-01-01T23:59:59.000Z

    Building galaxy merger trees from a state-of-the-art cosmological hydrodynamics simulation, Horizon-AGN, we perform a statistical study of how mergers and smooth accretion drive galaxy morphologic properties above $z > 1$. More specifically, we investigate how stellar densities, effective radii and shape parameters derived from the inertia tensor depend on mergers of different mass ratios. We find strong evidence that smooth accretion tends to flatten small galaxies over cosmic time, leading to the formation of disks. On the other hand, mergers, and not only the major ones, exhibit a propensity to puff up and destroy stellar disks, confirming the origin of elliptical galaxies. We also find that elliptical galaxies are more susceptible to grow in size through mergers than disc galaxies with a size-mass evolution $r \\prop M^{1.2}$ instead of $r \\prop M^{-0.5} - M^{0.5}$ depending on the merger mass ratio. The gas content drive the size-mass evolution due to merger with a faster size growth for gas-poor galaxies...

  6. The Relation Between Dry Vortex Merger and Tropical Cyclone Genesis over the Atlantic Ocean

    SciTech Connect (OSTI)

    Chen, Shu-Hua; Liu, Yi-Chin

    2014-10-27T23:59:59.000Z

    A strong, convective African tropical disturbance has a greater chance to develop into a Tropical 23 Depression (TD) if it merges with a shallow, dry vortex (D-vortex) from the north of the African 24 easterly jet (AEJ) after leaving the western coast. Using 11-year reanalysis data we found that the 25 western tip of a vortex strip at northwestern Africa can serve as dry vortices for the D-vortex 26 merger if it shifts southward. Another source of D-vortices is the westward propagating lows 27 along the southern edge of the Saharan air. The D-vortex merger process occurred for 63.5% of 28 tropical cyclones (TCs) or developing systems over the main development region of the Atlantic 29 Ocean, while it occurred for 54% of non-developing systems. TC genesis could be largely 30 controlled by the large-scale environment, but the differences in characteristics of vortices 31 associated with the D-vortex merger between developing and non-developing systems could 32 potentially help determine their destinies; in general, developing systems were dominated by a 33 more intense and moist south vortex, while non-developing systems were dominated by a north 34 vortex which was more intense, drier, and larger in size. Analysis also shows that 74% of intense 35 developing systems were involved with the D-vortex merger process. More attention needs to be 36 paid to the D-vortex merger and the characteristics of those vortices as they can play significant 37 roles or have a strong indication in Atlantic TC genesis.

  7. PLT data acquisition and analysis system

    SciTech Connect (OSTI)

    Murphy, J.A.; Gibney, T.R.

    1986-08-01T23:59:59.000Z

    The data acquisition and analysis system for PLT (Princeton Large Torus) is being moved from a DEC-10 to a VAX 11/785. Most of the major diagnostics are currently running on the VAX, with approximately 1 Mbyte of data being taken each shot. The system uses the MIT model data system (MDS) for acquisition and archival of data and the PPPL event-controlled scheduler (ECS) for scheduling. The analysis programs use the MDS data retrieval subroutines which deliver correctly calibrated results to the user program.

  8. Acquisition Letters Archives | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed off Energy.gov. Are you0 ARRA Newsletters 20103-03 AUDITProducts &Acquisition LetterAcquisition

  9. Numerical simulations of neutron star mergers as the central engines of short-period gamma-ray bursts 

    E-Print Network [OSTI]

    Archibald, Richard Andrew

    2009-01-01T23:59:59.000Z

    We present the results of fully three dimensional, post-Newtonian hydrodynamical simulations of the dynamical evolution of mergers between compact stellar remnants (neutron stars and black holes). Although the code is ...

  10. The E802 data acquisition complex

    SciTech Connect (OSTI)

    Le Vine, M.J.

    1985-08-01T23:59:59.000Z

    The data acquisition architecture planned for experiment E802 is described. A VAX 11/785 will be front-ended by a VME-based array of 68000-family microprocessors, which will be used as intelligent CAMAC crate controllers, event builders, and to augment the computing power of the VAX for on-line analysis of the data.

  11. Talent Acquisition Talent Development Social Network Essentials

    E-Print Network [OSTI]

    Bordenstein, Seth

    Talent Acquisition Talent Development Social Network Essentials for Students Dan Ryan April 1, 2013 #12;What are your goals for today? #12;Beginning steps · Resume/CV · Networking · Social networks relevant information ­ Internships ­ Research ­ Study abroad #12;What is Networking? · A two-way process

  12. Effects of the microphysical Equation of State in the mergers of magnetized Neutron Stars With Neutrino Cooling

    E-Print Network [OSTI]

    C. Palenzuela; S. L. Liebling; D. Neilsen; L. Lehner; O. L. Caballero; E. O'Connor; M. Anderson

    2015-05-07T23:59:59.000Z

    We study the merger of binary neutron stars using different realistic, microphysical nuclear equations of state, as well as incorporating magnetic field and neutrino cooling effects. In particular, we concentrate on the influence of the equation of state on the gravitational wave signature and also on its role, in combination with cooling and electromagnetic effects, in determining the properties of the hypermassive neutron star resulting from the merger, the production of neutrinos, and the characteristics of ejecta from the system. The ejecta we find are consistent with other recent studies that find soft equations of state produce more ejecta than stiffer equations of state. Moreover, the degree of neutron richness increases for softer equations of state. In light of reported kilonova observations (associated to GRB~130603B and GRB~060614) and the discovery of relatively low abundances of heavy, radioactive elements in deep sea deposits (with respect to possible production via supernovae), we speculate that a soft EoS might be preferred---because of its significant production of sufficiently neutron rich ejecta---if such events are driven by binary neutron star mergers. We also find that realistic magnetic field strengths, obtained with a sub-grid model tuned to capture magnetic amplification via the Kelvin-Helmholtz instability at merger, are generally too weak to affect the gravitational wave signature post-merger within a time scale of $\\approx 10$~ms but can have subtle effects on the post-merger dynamics.

  13. Real-time analog acquisition of electrophysiological signals with Soma

    E-Print Network [OSTI]

    Jonas, Eric Michael

    2009-01-01T23:59:59.000Z

    Soma is a high-density recording system for real-time acquisition and analysis of extracellular electrophysiological signals. Here I describe the design, implementation, and evaluation of the Soma Acquisition Board, an ...

  14. Policy Flash 2013-57 New Strategic Sourcing Acquisition Guide...

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

    Policy Flash 2013-57 New Strategic Sourcing Acquisition Guide Chapter 7.2 Policy Flash 2013-57 New Strategic Sourcing Acquisition Guide Chapter 7.2 Questions concerning this policy...

  15. Policy Flash 2014-38 Federal Acquisition Circular (FAC) 2005...

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

    8 Federal Acquisition Circular (FAC) 2005-76 Policy Flash 2014-38 Federal Acquisition Circular (FAC) 2005-76 Questions concerning this policy flash should be directed to Jason...

  16. POLICY FLASH 2014-31 Federal Acquisition Circulars (FACs) 2005...

    Office of Environmental Management (EM)

    POLICY FLASH 2014-31 Federal Acquisition Circulars (FACs) 2005-73 and 2005-74 POLICY FLASH 2014-31 Federal Acquisition Circulars (FACs) 2005-73 and 2005-74 Questions concerning...

  17. A Multiple Merger Model for the Origin of Ultraluminous Infrared Galaxies

    E-Print Network [OSTI]

    Yoshiaki Taniguchi; Yasuhiro Shioya

    1998-05-16T23:59:59.000Z

    It has been often considered that the dissipative collapse caused by a merger of two gas-rich galaxies is responsible for the intense nuclear starbursts or the nonthermal quasar activity in ultraluminous infrared galaxies due to the efficient fueling induced by it. It is also widely known that Ultraluminous Infrared Galaxies (ULIGs) are often found in merging systems. Some ULIGs, such as Arp 220, show two compact starburst regions which are considered to be associated with two galactic nuclei in the process of merging. However, since a merger between two galaxies may make only one compact starburst region, we suggest the possibility that double-nucleus ULIGs are composed of two merging nuclei, each of which contains a couple of galactic nuclei.

  18. Acquisition Letter 2009-03 Acquisition Planning-Extending A Management...

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

    Planning AcquisitionLetter2009dash03Rev1.pdf More Documents & Publications Subject: Cost and Price Analysis Microsoft Word - Policy Flash 2010-67 Attachment 1 Subject: Cost...

  19. A CLOSE-PAIR ANALYSIS OF DAMP MERGERS AT INTERMEDIATE REDSHIFTS

    SciTech Connect (OSTI)

    Chou, Richard C. Y.; Abraham, Roberto G. [Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4 (Canada); Bridge, Carrie R., E-mail: chou@astro.utoronto.ca, E-mail: abraham@astro.utoronto.ca, E-mail: bridge@astro.caltech.edu [Department of Astronomy, California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125 (United States)

    2012-12-01T23:59:59.000Z

    We have studied the kinematics of {approx}2800 candidate close-pair galaxies at 0.1 < z < 1.2 identified from the Canada-France-Hawaii Telescope Legacy Survey fields. Spectra of these systems were obtained using spectrometers on the 6.5 m Magellan and 5 m Hale telescopes. These data allow us to constrain the rate of dry mergers at intermediate redshifts and to test the 'hot halo' model for quenching of star formation. Using virial radii estimated from the correlation between dynamical and stellar masses published by Leauthaud et al., we find that around 1/5 of our candidate pairs are likely to share a common dark matter halo (our metric for close physical association). These pairs are divided into red-red, blue-red, and blue-blue systems using the rest-frame colors classification method introduced in Chou et al.. Galaxies classified as red in our sample have very low star formation rates, but they need not be totally quiescent, and hence we refer to them as 'damp', rather than 'dry', systems. After correcting for known selection effects, the fraction of blue-blue pairs is significantly greater than that of red-red and blue-red pairs. Red-red pairs are almost entirely absent from our sample, suggesting that damp mergers are rare at z {approx} 0.5. Our data support models with a short merging timescale (<0.5 Gyr) in which star formation is enhanced in the early phase of mergers, but quenched in the late phase. Hot halo models may explain this behavior, but only if virial shocks that heat gas are inefficient until major mergers are nearly complete.

  20. R-Process Nucleosynthesis in Dynamically Ejected Matter of Neutron Star Mergers

    E-Print Network [OSTI]

    Stephane Goriely; Andreas Bauswein; H. -Thomas Janka

    2011-08-09T23:59:59.000Z

    Although the rapid neutron-capture process, or r-process, is fundamentally important for explaining the origin of approximately half of the stable nuclei with A > 60, the astrophysical site of this process has not been identified yet. Here we study r-process nucleosynthesis in material that is dynamically ejected by tidal and pressure forces during the merging of binary neutron stars (NSs) and within milliseconds afterwards. For the first time we make use of relativistic hydrodynamical simulations of such events, defining consistently the conditions that determine the nucleosynthesis, i.e., neutron enrichment, entropy, early density evolution and thus expansion timescale, and ejecta mass. We find that 10^{-3}-10^{-2} solar masses are ejected, which is enough for mergers to be the main source of heavy (A > 140) galactic r-nuclei for merger rates of some 10^{-5} per year. While asymmetric mergers eject 2-3 times more mass than symmetric ones, the exact amount depends weakly on whether the NSs have radii of ~15 km for a "stiff" nuclear equation of state (EOS) or ~12 km for a "soft" EOS. R-process nucleosynthesis during the decompression becomes largely insensitive to the detailed conditions because of efficient fission recycling, producing a composition that closely follows the solar r-abundance distribution for nuclei with mass numbers A > 140. Estimating the light curve powered by the radioactive decay heating of r-process nuclei with an approximative model, we expect high emission in the B-V-R bands for 1-2 days with potentially observable longer duration in the case of asymmetric mergers because of the larger ejecta mass.

  1. Do Mergers Improve Efficiency? Evidence from Restructuring the U.S. Electric Power Sector

    E-Print Network [OSTI]

    Kwoka, John; Pollitt, Michael G.

    ), European Workshop on Efficiency and Productivity Analysis (Brussels 2005) and financial support from the American Public Power Association, the CMI Electricity Project IR-45 and the ESRC Electricity Policy Research Group. All opinions in this paper... customers of all investor-owned electricity operating companies. Crucially for our purposes, reporting requirements imposed by the Federal Energy Regulatory Commission on all operating companies were unchanged by merger, creating a consistent set of data...

  2. Data Acquisition-Manipulation At Truckhaven Area (Layman Energy...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At Truckhaven Area (Layman Energy Associates, 2007)...

  3. Data Acquisition-Manipulation At Cascades Region (Ingebritsen...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At Cascades Region (Ingebritsen & Mariner, 2010) Exploration...

  4. Cluster Mergers and Diffuse Radio Emission in Abell 2256 and Abell 754

    E-Print Network [OSTI]

    T. E. Clarke; T. A. Ensslin

    2001-06-07T23:59:59.000Z

    We present deep VLA observations of the galaxy clusters Abell 2256 and Abell 754, both of which appear to be in the violent stage of major cluster merger events. The complex nature of Abell 2256 is revealed through radio images which, in addition to the head-tail galaxies, show two extended, irregular, and sharp-edged regions of diffuse radio emission at the cluster periphery (so called radio relics), and a large-scale diffuse radio halo located in the central regions of the cluster. Polarimetry of the A2256 cluster relics reveals large-scale ordered magnetic fields which appear to trace the bright filaments in the relics. The polarization fraction across the relics ranges from 20% - 40% with the majority of the relics polarized above the 30% level. At the sensitivity of our current observations we place an upper limit of 20% on the polarization of the radio halo. Low frequency VLA observations of Abell 754 reveal extended, diffuse radio (halo) emission in the cluster core region as well as steep spectrum emission in the cluster periphery. The location, morphology, and spectral index of the peripheral emission are consistent with the properties of radio relics. The X-ray evidence of the ongoing mergers in both clusters, together with the polarization properties of A2256's radio relics supports recent suggestions of a merger-induced origin of the relic emission. Deciphering the complex radio properties of these clusters may thus provide the key to understanding the dynamical history of the systems.

  5. General relativistic simulations of black hole-neutron star mergers: Effects of magnetic fields

    E-Print Network [OSTI]

    Zachariah B. Etienne; Yuk Tung Liu; Vasileios Paschalidis; Stuart L. Shapiro

    2012-05-15T23:59:59.000Z

    As a neutron star (NS) is tidally disrupted by a black hole (BH) companion at the end of a BH-NS binary inspiral, its magnetic fields will be stretched and amplified. If sufficiently strong, these magnetic fields may impact the gravitational waveforms, merger evolution and mass of the remnant disk. Formation of highly-collimated magnetic field lines in the disk+spinning BH remnant may launch relativistic jets, providing the engine for a short-hard GRB. We analyze this scenario through fully general relativistic, magnetohydrodynamic (GRMHD) BHNS simulations from inspiral through merger and disk formation. Different initial magnetic field configurations and strengths are chosen for the NS interior for both nonspinning and moderately spinning (a/M=0.75) BHs aligned with the orbital angular momentum. Only strong interior (Bmax~10^17 G) initial magnetic fields in the NS significantly influence merger dynamics, enhancing the remnant disk mass by 100% and 40% in the nonspinning and spinning BH cases, respectively. However, detecting the imprint of even a strong magnetic field may be challenging for Advanced LIGO. Though there is no evidence of mass outflows or magnetic field collimation during the preliminary simulations we have performed, higher resolution, coupled with longer disk evolutions and different initial magnetic field configurations, may be required to definitively assess the possibility of BHNS binaries as short-hard GRB progenitors.

  6. Chemical Signature of a Major Merger in the Early Formation of Small Magellanic Cloud

    E-Print Network [OSTI]

    Tsujimoto, Takuji

    2009-01-01T23:59:59.000Z

    The formation history of the Small Magellanic cloud (SMC) is unraveled based on the results of our new chemical evolution models constructed for the SMC, highlighting the observed anomaly in the age-metallicity relation for star clusters in the SMC. We first propose that evidence of a major merger is imprinted in the age-metallicity relation as a dip in [Fe/H]. Our models predict that the major merger with a mass ratio of 1:1 to 1:4 occurred at ~7.5 Gyr ago, with a good reproduction of the abundance distribution function of field stars in the SMC. Furthermore, our models predict a relatively large scatter in [Mg/Fe] for -1.4 < [Fe/H] <-1.1 as a reflection of a looping feature resulting from the temporally inverse progress of chemical enrichment, which can be tested against future observational results. Given that the observed velocity dispersion (~30 km/s) of the SMC is much smaller than that (~160 km/s) of the Galactic halo, our finding strongly implies that the predicted merger event happened in a sma...

  7. CHEMICAL SIGNATURE OF A MAJOR MERGER IN THE EARLY FORMATION OF THE SMALL MAGELLANIC CLOUD

    SciTech Connect (OSTI)

    Tsujimoto, Takuji [National Astronomical Observatory, Mitaka-shi, Tokyo 181-8588 (Japan); Bekki, Kenji [School of Physics, University of New South Wales, Sydney 2052, NSW (Australia)], E-mail: taku.tsujimoto@nao.ac.jp

    2009-08-01T23:59:59.000Z

    The formation history of the Small Magellanic Cloud (SMC) is unraveled based on the results of our new chemical evolution models constructed for the SMC, highlighting the observed anomaly in the age-metallicity relation for star clusters in the SMC. We first propose that evidence of a major merger is imprinted in the age-metallicity relation as a dip in [Fe/H]. Our models predict that the major merger with a mass ratio of 1:1 to 1:4 occurred at {approx}7.5 Gyr ago, with a good reproduction of the abundance distribution function of field stars in the SMC. Furthermore, our models predict a relatively large scatter in [Mg/Fe] for -1.4 {<=} [Fe/H] {<=} -1.1 as a reflection of a looping feature resulting from the temporally inverse progress of chemical enrichment, which can be tested against future observational results. Given that the observed velocity dispersion ({approx}30 km s{sup -1}) of the SMC is much smaller than that ({approx}160 km s{sup -1}) of the Galactic halo, our finding strongly implies that the predicted merger event happened in a small group environment that was far from the Galaxy and contained a number of small gas-rich dwarfs comparable to the SMC. This theoretical view is extensively discussed in the framework that considers a connection with the formation history of the Large Magellanic Cloud.

  8. Flash Galaxy Cluster Merger, Simulated using the Flash Code, Mass Ratio 1:1

    ScienceCinema (OSTI)

    None

    2013-04-19T23:59:59.000Z

    Since structure in the universe forms in a bottom-up fashion, with smaller structures merging to form larger ones, modeling the merging process in detail is crucial to our understanding of cosmology. At the current epoch, we observe clusters of galaxies undergoing mergers. It is seen that the two major components of galaxy clusters, the hot intracluster gas and the dark matter, behave very differently during the course of a merger. Using the N-body and hydrodynamics capabilities in the FLASH code, we have simulated a suite of representative galaxy cluster mergers, including the dynamics of both the dark matter, which is collisionless, and the gas, which has the properties of a fluid. 3-D visualizations such as these demonstrate clearly the different behavior of these two components over time. Credits: Science: John Zuhone (Harvard-Smithsonian Center for Astrophysics Visualization: Jonathan Gallagher (Flash Center, University of Chicago)?? This research used resources of the Argonne Leadership Computing Facility at Argonne National Laboratory, which is supported by the Office of Science of the U.S. Dept. of Energy (DOE) under contract DE-AC02-06CH11357. This research was supported by the National Nuclear Security Administration's (NNSA) Advanced Simulation and Computing (ASC) Academic Strategic Alliance Program (ASAP).

  9. A compact binary merger model for the short, hard GRB 050509b

    E-Print Network [OSTI]

    William H. Lee; Enrico Ramirez-Ruiz; Jonathan Granot

    2005-08-04T23:59:59.000Z

    The first X-ray afterglow for a short (~30 ms), hard gamma-ray burst was detected by Swift on 9 May 2005 (GRB 050509b). No optical or radio counterpart was identified in follow-up observations. The tentative association of the GRB with a nearby giant elliptical galaxy at redshift z=0.2248 would imply a total energy release E(gamma, isotropic) ~3 x 10**48 erg, and that the progenitor had traveled several tens of kpc from its point of origin, in agreement with expectations linking these events to the final merger of compact binaries driven by gravitational wave emission. We model the dynamical merger of such a system and the time-dependent evolution of the accretion tori thus created. The resulting energetics, variability, and expected durations are consistent with GRB 050509b originating from the tidal disruption of a neutron star by a stellar mass black hole, or of the merger of two neutron stars followed by prompt gravitational collapse of the massive remnant. We discuss how the available gamma-ray and X-ray data provide a probe for the nature of the relativistic ejecta and the surrounding medium.

  10. Type Ia supernovae from merging white dwarfs. II. Post-merger detonations

    SciTech Connect (OSTI)

    Raskin, Cody; Kasen, Daniel [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States); Moll, Rainer; Woosley, Stan [Department of Physics and Department of Astronomy, University of California, Santa Cruz, CA (United States); Schwab, Josiah [Department of Physics and Department of Astronomy, University of California, Berkeley, CA (United States)

    2014-06-10T23:59:59.000Z

    Merging carbon-oxygen (CO) white dwarfs are a promising progenitor system for Type Ia supernovae (SNe Ia), but the underlying physics and timing of the detonation are still debated. If an explosion occurs after the secondary star is fully disrupted, the exploding primary will expand into a dense CO medium that may still have a disk-like structure. This interaction will decelerate and distort the ejecta. Here we carry out multidimensional simulations of 'tamped' SN Ia models, using both particle and grid-based codes to study the merger and explosion dynamics and a radiative transfer code to calculate synthetic spectra and light curves. We find that post-merger explosions exhibit an hourglass-shaped asymmetry, leading to strong variations in the light curves with viewing angle. The two most important factors affecting the outcome are the scale height of the disk, which depends sensitively on the binary mass ratio, and the total {sup 56}Ni yield, which is governed by the central density of the remnant core. The synthetic broadband light curves rise and decline very slowly, and the spectra generally look peculiar, with weak features from intermediate mass elements but relatively strong carbon absorption. We also consider the effects of the viscous evolution of the remnant and show that a longer time delay between merger and explosion probably leads to larger {sup 56}Ni yields and more symmetrical remnants. We discuss the relevance of this class of aspherical 'tamped' SN Ia for explaining the class of 'super-Chandrasekhar' SN Ia.

  11. Supermassive Black Hole Growth and Merger Rates from Cosmological N-body Simulations

    E-Print Network [OSTI]

    Miroslav Micic; Kelly Holley-Bockelmann; Steinn Sigurdsson; Tom Abel

    2007-03-20T23:59:59.000Z

    Understanding how seed black holes grow into intermediate and supermassive black holes (IMBHs and SMBHs, respectively) has important implications for the duty-cycle of active galactic nuclei (AGN), galaxy evolution, and gravitational wave astronomy. Most studies of the cosmological growth and merger history of black holes have used semianalytic models and have concentrated on SMBH growth in luminous galaxies. Using high resolution cosmological N-body simulations, we track the assembly of black holes over a large range of final masses -- from seed black holes to SMBHs -- over widely varying dynamical histories. We used the dynamics of dark matter halos to track the evolution of seed black holes in three different gas accretion scenarios. We have found that growth of Sagittarius A* - size SMBH reaches its maximum mass M_{SMBH}~10^6Msun at z~6 through early gaseous accretion episodes, after which it stays at near constant mass. At the same redshift, the duty-cycle of the host AGN ends, hence redshift z=6 marks the transition from an AGN to a starburst galaxy which eventually becomes the Milky Way. By tracking black hole growth as a function of time and mass, we estimate that the IMBH merger rate reaches a maximum of R_{max}=55 yr^-1 at z=11. From IMBH merger rates we calculate N_{ULX}=7 per Milky Way type galaxy per redshift in redshift range 2

  12. Post-merger evolution of a neutron star-black hole binary with neutrino transport

    E-Print Network [OSTI]

    Foucart, Francois; Roberts, Luke; Duez, Matthew D; Haas, Roland; Kidder, Lawrence E; Ott, Christian D; Pfeiffer, Harald P; Scheel, Mark A; Szilagyi, Bela

    2015-01-01T23:59:59.000Z

    We present a first simulation of the post-merger evolution of a black hole-neutron star binary in full general relativity using an energy-integrated general relativistic truncated moment formalism for neutrino transport. We describe our implementation of the moment formalism and important tests of our code, before studying the formation phase of a disk after a black hole-neutron star merger. We use as initial data an existing general relativistic simulation of the merger of a neutron star of 1.4 solar mass with a black hole of 7 solar mass and dimensionless spin a/M=0.8. Comparing with a simpler leakage scheme for the treatment of the neutrinos, we find noticeable differences in the neutron to proton ratio in and around the disk, and in the neutrino luminosity. We find that the electron neutrino luminosity is much lower in the transport simulations, and that the remnant is less neutron-rich. The spatial distribution of the neutrinos is significantly affected by relativistic effects. Over the short timescale e...

  13. Dynamical interactions and the black-hole merger rate of the Universe

    SciTech Connect (OSTI)

    O'Leary, Ryan M.; O'Shaughnessy, Richard; Rasio, Frederic A. [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, Massachusetts 02138 (United States); Northwestern University, Department of Physics and Astronomy, 2132 Tech Drive, Evanston, Illinois 60208 (United States)

    2007-09-15T23:59:59.000Z

    Binary black holes can form efficiently in dense young stellar clusters, such as the progenitors of globular clusters, via a combination of gravitational segregation and cluster evaporation. We use simple analytic arguments supported by detailed N-body simulations to determine how frequently black holes born in a single stellar cluster should form binaries, be ejected from the cluster, and merge through the emission of gravitational radiation. We then convolve this 'transfer function' relating cluster formation to black-hole mergers with (i) the distribution of observed cluster masses and (ii) the star formation history of the Universe, assuming that a significant fraction g{sub cl} of star formation occurs in clusters and that a significant fraction g{sub evap} of clusters undergo this segregation and evaporation process. We predict future ground-based gravitational wave detectors could observe {approx}500(g{sub cl}/0.5)(g{sub evap}/0.1) double black-hole mergers per year, and the presently operating LIGO interferometer would have a chance (50%) at detecting a merger during its first full year of science data. More realistically, advanced LIGO and similar next-generation gravitational wave observatories provide unique opportunities to constrain otherwise inaccessible properties of clusters formed in the early Universe.

  14. The CDMS II data acquisition system

    SciTech Connect (OSTI)

    Bauer, D.A.; /Fermilab; Burke, S.; /UC, Santa Barbara; Cooley, J.; /Southern Methodist U.; Crisler, M.; /Fermilab; Cushman, P.; /Minnesota U.; DeJongh, F.; /Fermilab; Duong, L.; /Minnesota U.; Ferril, R.; /UC, Santa Barbara; Golwala, S.R.; /Caltech; Hall, J.; /Fermilab; Holmgren, D.; /Fermilab /Texas A-M; ,

    2011-01-01T23:59:59.000Z

    The Data Acquisition System for the CDMS II dark matter experiment was designed and built when the experiment moved to its new underground installation at the Soudan Lab. The combination of remote operation and increased data load necessitated a completely new design. Elements of the original LabView system remained as stand-alone diagnostic programs, but the main data processing moved to a VME-based system with custom electronics for signal conditioning, trigger formation and buffering. The data rate was increased 100-fold and the automated cryogenic system was linked to the data acquisition. A modular server framework with associated user interfaces was implemented in Java to allow control and monitoring of the entire experiment remotely.

  15. The acquisition of dangerous biological materials :

    SciTech Connect (OSTI)

    Aceto, Donato Gonzalo; Astuto-Gribble, Lisa M.; Gaudioso, Jennifer M.

    2007-11-01T23:59:59.000Z

    Numerous terrorist organizations have openly expressed interest in producing and deploying biological weapons. However, a limiting factor for many terrorists has been the acquisition of dangerous biological agents, as evidenced by the very few successful instances of biological weapons use compared to the number of documented hoaxes. Biological agents vary greatly in their ability to cause loss of life and economic damage. Some agents, if released properly, can kill many people and cause an extensive number of secondary infections; other agents will sicken only a small number of people for a short period of time. Consequently, several biological agents can potentially be used to perpetrate a bioterrorism attack but few are likely capable of causing a high consequence event. It is crucial, from a US national security perspective, to more deeply understand the likelihood that terrorist organizations can acquire the range of these agents. Few studies have attempted to comprehensively compile the technical information directly relevant to the acquisition of dangerous bacteria, viruses and toxins. In this report, technical fact sheets were assembled for 46 potentially dangerous biological agents. Much of the information was taken from various research sources which could ultimately and significantly expedite and improve bioterrorism threat assessments. By systematically examining a number of specific agent characteristics included in these fact sheets, it may be possible to detect, target, and implement measures to thwart future terrorist acquisition attempts. In addition, the information in these fact sheets may be used as a tool to help laboratories gain a rudimentary understanding of how attractive a method laboratory theft is relative to other potential acquisition modes.

  16. Acquisitions___Communications.pdf | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyDepartment ofATVM Loan ProgramUsAcquisitions___Communications.pdf

  17. National Ignition Facility project acquisition plan

    SciTech Connect (OSTI)

    Callaghan, R.W.

    1996-04-01T23:59:59.000Z

    The purpose of this National Ignition Facility Acquisition Plan is to describe the overall procurement strategy planned for the National Ignition Facility (NIF) Project. The scope of the plan describes the procurement activities and acquisition strategy for the following phases of the NIF Project, each of which receives either plant and capital equipment (PACE) or other project cost (OPC) funds: Title 1 and 2 design and Title 3 engineering (PACE); Optics manufacturing facilitization and pilot production (OPC); Convention facility construction (PACE); Procurement, installation, and acceptance testing of equipment (PACE); and Start-up (OPC). Activities that are part of the base Inertial Confinement Fusion (ICF) Program are not included in this plan. The University of California (UC), operating Lawrence Livermore National Laboratory (LLNL) and Los Alamos National Laboratory, and Lockheed-Martin, which operates Sandia National Laboratory (SNL) and the University of Rochester Laboratory for Laser Energetics (UR-LLE), will conduct the acquisition of needed products and services in support of their assigned responsibilities within the NIF Project structure in accordance with their prime contracts with the Department of Energy (DOE). LLNL, designated as the lead Laboratory, will have responsibility for all procurements required for construction, installation, activation, and startup of the NIF.

  18. PETC Review

    SciTech Connect (OSTI)

    Santore, R.R.; Blaustein, B.D.; Friedman, S.; Reiss, J.; Brown, J.; Price, M.M. (eds.)

    1993-01-01T23:59:59.000Z

    This issue of the PETC Review is devoted to explaining how the private sector can do business with DOE-and with PETC in particular-and how DOE works with academia, industry, and state and local groups to accomplish objectives of mutual interest. Over the past several years, the notion of cost-sharing'' has been receiving increased attention. Indeed, cost-shared RD D is becoming the norm, not only within DOE but also among other government agencies, including the Department of Defense. It may surprise some of our readership to learn that RD D cost-sharing is not a new government policy. In fact, it has been part of the DOE Acquisition Regulations from their inception in 1977. In lay terms, cost participation, a general kind of cost-sharing, is required for RD D efforts in which the non-Federal participant's goal is commercialization or in situations for which it is reasonable to expect that economic benefits will accrue to the participant as a result of the work. The policy is quite flexible and states that the degree of non-DOEcost participation depends on a number of factors, including the nature of the work performed and the extent of the project risk. As competition for RD D funds increases, it is to be expected that cost-sharing requirements for development, and even for basic research, will increase. Nevertheless, we think that Federal support of RD D will continue to be necessary to maintain this country's leadership in science, technology, industry, and living standards.

  19. Post-merger evolution of a neutron star-black hole binary with neutrino transport

    E-Print Network [OSTI]

    Francois Foucart; Evan O'Connor; Luke Roberts; Matthew D. Duez; Roland Haas; Lawrence E. Kidder; Christian D. Ott; Harald P. Pfeiffer; Mark A. Scheel; Bela Szilagyi

    2015-02-13T23:59:59.000Z

    We present a first simulation of the post-merger evolution of a black hole-neutron star binary in full general relativity using an energy-integrated general relativistic truncated moment formalism for neutrino transport. We describe our implementation of the moment formalism and important tests of our code, before studying the formation phase of a disk after a black hole-neutron star merger. We use as initial data an existing general relativistic simulation of the merger of a neutron star of 1.4 solar mass with a black hole of 7 solar mass and dimensionless spin a/M=0.8. Comparing with a simpler leakage scheme for the treatment of the neutrinos, we find noticeable differences in the neutron to proton ratio in and around the disk, and in the neutrino luminosity. We find that the electron neutrino luminosity is much lower in the transport simulations, and that the remnant is less neutron-rich. The spatial distribution of the neutrinos is significantly affected by relativistic effects. Over the short timescale evolved, we do not observe purely neutrino-driven outflows. However, a small amount of material (3e-4Msun) is ejected in the polar region during the circularization of the disk. Most of that material is ejected early in the formation of the disk, and is fairly neutron rich. Through r-process nucleosynthesis, that material should produce high-opacity lanthanides in the polar region, and could thus affect the lightcurve of radioactively powered electromagnetic transients. We also show that by the end of the simulation, while the bulk of the disk is neutron-rich, its outer layers have a higher electron fraction. As that material would be the first to be unbound by disk outflows on longer timescales, the changes in Ye experienced during the formation of the disk could have an impact on the nucleosynthesis outputs from neutrino-driven and viscously-driven outflows. [Abridged

  20. Realistic fission models, new beta-decay half-lives and the r-process in neutron star mergers

    SciTech Connect (OSTI)

    Shibagaki, S.; Kajino, T. [Department of Astronomy, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan and National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588 (Japan); Chiba, S. [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo, 152-8850 (Japan); Lorusso, G.; Nishimura, S. [RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Mathews, G. J. [Center for Astrophysics, Department of Physics, University of Notre Dame, IN 46556 (United States)

    2014-05-02T23:59:59.000Z

    Almost half of heavy nuclei beyond iron are considered to be produced by rapid neutron capture process (r-process). This process occurs in the neutron-rich environment such as core-collapse supernovae or neutron star mergers, but the main production site is still unknown. In the r-process of neutron star mergers, nuclear fission reactions play an important role. Also beta-decay half-lives of magic nuclei are crucial for the r-process. We have carried out r-process nucleosynthesis calculations based upon new theoretical estimates of fission fragment distributions and new beta-decay half-lives for N=82 nuclei measured at RIBF-RIKEN. We investigate the effect of nuclear fission on abundance patterns in the matter ejected from neutron star mergers with two different fission fragment mass distributions. We also discuss how the new experimental beta-decay half-lives affect the r-process.

  1. Federal Acquisition Circular 2005-60

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers New Training on Energy ManagementAugustin2012)4 News BlastAcquisition

  2. Federal Acquisition Circular WAC) 2001-24

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers New Training on Energy ManagementAugustin2012)4 News BlastAcquisition FLASH

  3. Federal Acquisition Circulars 17, 18 and 20

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers New Training on Energy ManagementAugustin2012)4 News BlastAcquisition FLASH

  4. Federal Acquisition Regulation Clause Usage Guide

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directed offOCHCO2: FinalOffers New Training on Energy ManagementAugustin2012)4 News BlastAcquisition

  5. Procurement and Acquisition | Department of Energy

    Energy Savers [EERE]

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

  6. Acquisition Career Management Program Manual Interim Guidance

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0 March

  7. Acquisition Guide Chapter 42.5

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter 42.5

  8. Acquisition Strategy RM | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,April

  9. Acquisition and Project Management Continuous Improvement Presentation |

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13,AprilDepartment

  10. Walnut Capital Acquisitions | Open Energy Information

    Open Energy Info (EERE)

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

  11. Property:DataAcquisition | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to: navigation,PillarPublicationType JumpDOEInvolve Jump to: navigation, searchDataAcquisition

  12. Data acquisition command interface using VAX/VMS DCL

    SciTech Connect (OSTI)

    Poore, R.V.; Barrus, D.M.; Cort, G.; Goldstone, J.A.; Miller, L.B.; Nelson, R.O.

    1985-01-01T23:59:59.000Z

    The user interface to a data acquisition system is being developed at the Los Alamos Weapons Neutron Research Facility using the VAX/VMS command language interface DCL. Commands are being implemented which provide for system initialization and control functions and FASTBUS diagnostics. The data acquisition system incorporates the concept of a data acquisition ''state'' (running, halted, etc.) where a certain subset of input commands is allowed.

  13. Characteristics of rural bank acquisitions: a logit analysis

    E-Print Network [OSTI]

    Applewhite, Jennifer Lynn

    1994-01-01T23:59:59.000Z

    interstate acquisition of their banks, the rate of acquisitions soared. In 1978, Maine enacted legislation permitting interstate banking on a reciprocal basis. Until mid-1982, Maine was the only state with such a law. In 1982, both New York and Alaska... of U. S. banks using comparative performance profiles and logit analysis. Characteristics of acquired and acquiring banks are compared for five years before the acquisitions and found to have significantly different rates of return on assets...

  14. Studying MRI acquisition protocols of sustained sounds with a multimodal acquisition system

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    system which utilizes infrared emit- ting diodes (IREDs) requires that the sensors to be visible from a multimodal acquisition system which uses electromagnetogra- phy sensors to locate the US probe a millimetric accuracy 3D MRI images of the vocal tract have enabled more accurate evaluations of vocal tract

  15. Sandia Energy - National Supervisory Control and Data Acquisition...

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

    National Supervisory Control and Data Acquisition (SCADA) Home Stationary Power Grid Modernization Cyber Security for Electric Infrastructure National Supervisory Control and Data...

  16. NA APM - Associate Administrator for Acquisition & Project Management...

    National Nuclear Security Administration (NNSA)

    Us Our Operations Management and Budget Office of Civil Rights Workforce Statistics NA APM - Associate Administrator for Acquisition ... NA APM - Associate...

  17. Policy Flash 2014-29 Acquisition Letter 07 - Benchmark Compensation...

    Office of Environmental Management (EM)

    Letter 07 - Benchmark Compensation Amount for Individual Executive Salary Actions Policy Flash 2014-29 Acquisition Letter 07 - Benchmark Compensation Amount for Individual...

  18. Sandia Energy - National Supervisory Control and Data Acquisition...

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

    National Supervisory Control and Data Acquisition (SCADA) Home Stationary Power Safety, Security & Resilience of Energy Infrastructure Grid Modernization Cyber Security for...

  19. acquisition facilitates 3d: Topics by E-print Network

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

    Physics Websites Summary: measurements and finally its instantiation through 3D printing, are presented. Laser scanner acquisition, reconstruction and 3D printing lend well...

  20. Office of Acquisition and Project Management (APM) Organization...

    Energy Savers [EERE]

    Project Management (APM) Organization Chart Office of Acquisition and Project Management (APM) Organization Chart test APM Org Chart v15.pdf More Documents & Publications MA-60 Org...

  1. Microsoft Word - CX Hillside and Squeque MT Land Acquisitions

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

    - KEWM-4 Proposed Action: Hillside Road and Squeque Properties Acquisition Funding Fish and Wildlife Project No. and Contract No.: 2002-003-00, BPA-007585 Categorical...

  2. POLICY FLASH 2015-21 - Federal Acquisition Circulars (FACs) 2005...

    Energy Savers [EERE]

    SUMMARY: Attached for your information is a brief summary of Federal Acquisition Regulation (FAR) amendments, published in the December 15, 2014 Federal Register at 79 FR...

  3. Delegation of Acquisition Executive Authority for Capital Asset...

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

    PortsmouthPaducah Project Office by murphie DelegationAcquisitionExecAuthorityCapitalAssetProjPPPO-MurphieEM.pdf -- PDF Document, 284 KB ID: NA Type: Organizations' Assignment...

  4. acquisition process nssap: Topics by E-print Network

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

    acquisition of newbuildings, the construction of newbuildings, operational aspects as well ... Maroulis, Vasileios 2004-01-01 9 MULTIVARIATE DATA PROCESSING SYSTEM: TRANSPUTER...

  5. Omak Creek land acquisition Fact Sheet.indd

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

    factsheet factsheet Omak Creek acquisition to protect summer steelhead habitat The Bonneville Power Administration is proposing to fund the purchase of two adjacent land parcels to...

  6. Acquisition of Wildlife Habitat in the Calispell Creek Watershed...

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

    the Calispell Creek watershed in Pend Oreille County, Wash. BPA funds the Albeni Falls Wildlife Mitigation Program, which is tasked with the acquisition and restoration of key...

  7. Cougar Creek land acquisition Fact Sheet.indd

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

    of wildlife habitat along Cougar Creek The Bonneville Power Administration proposes to fund the acquisition of wildlife mitigation lands in the Cougar Creek watershed in Shoshone...

  8. acquisition system atlas: Topics by E-print Network

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

    for several monitoring and control tasks. The Supervisory, Control And Data Acquisition (SCADA) system will use PVSS, a commercial software product chosen for the CERN LHC...

  9. National Geothermal Data Systems Data Acquisition and Access

    Broader source: Energy.gov [DOE]

    Project objective: To support the acquisition of new and legacy data from DOE-funded demonstration projects, the US Geological Survey, and other sources.

  10. acquisition scada systems: Topics by E-print Network

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

    Permission from IEEE must Engineering Websites Summary: of Real-Time Locational Marginal Price to SCADA Sensor Data Corruption Dae-Hyun Choi, Student Member, IEEE acquisition...

  11. Data Acquisition-Manipulation At San Francisco Volcanic Field...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At San Francisco Volcanic Field Area (Warpinski, Et Al., 2004)...

  12. Data Acquisition-Manipulation At Valley Of Ten Thousand Smokes...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At Valley Of Ten Thousand Smokes Region Area (Kodosky & Keith,...

  13. Data Acquisition-Manipulation At General Us Region (Blackwell...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At General Us Region (Blackwell & Richards, 2004) Exploration...

  14. Data Acquisition-Manipulation At Lassen Volcanic National Park...

    Open Energy Info (EERE)

    82) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At Lassen Volcanic National Park Geothermal Area (1982)...

  15. Data Acquisition-Manipulation At General Us Region (Blackwell...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At General Us Region (Blackwell, Et Al., 2000) Exploration...

  16. acquisition technique tpat: Topics by E-print Network

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

    Document Revision 7, September, 2005 Copyright 2005, Measurement Computing Corporation 12;iiSM MCCDAQSoftware- web doc Table of Contents About MCC Data Acquisition...

  17. ancestor leca acquisition: Topics by E-print Network

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

    Document Revision 7, September, 2005 Copyright 2005, Measurement Computing Corporation 12;iiSM MCCDAQSoftware- web doc Table of Contents About MCC Data Acquisition...

  18. acquisition programs oversight: Topics by E-print Network

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

    Document Revision 7, September, 2005 Copyright 2005, Measurement Computing Corporation 12;iiSM MCCDAQSoftware- web doc Table of Contents About MCC Data Acquisition...

  19. acquisition regulation american: Topics by E-print Network

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

    C:orporate acquisitions have important economic and political consequences. When one corporation acquires another, it often replaces the acquired firm's top managers with its own,...

  20. acquisition amc module: Topics by E-print Network

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

    Document Revision 7, September, 2005 Copyright 2005, Measurement Computing Corporation 12;iiSM MCCDAQSoftware- web doc Table of Contents About MCC Data Acquisition...

  1. Acquisition of fish and wildlife habitat along Upper Yakima River

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

    factsheet The Bonneville Power Admin- istration is working with the Yakama Nation to acquire and manage a 105 acre parcel in Kittitas County, Washington. BPA funds the acquisition...

  2. ,"New York Dry Natural Gas Reserves Acquisitions (Billion Cubic...

    U.S. Energy Information Administration (EIA) Indexed Site

    Name","Description"," Of Series","Frequency","Latest Data for" ,"Data 1","New York Dry Natural Gas Reserves Acquisitions (Billion Cubic Feet)",1,"Annual",2013 ,"Release...

  3. Transdermal microconduits by microscission for drug delivery and sample acquisition

    E-Print Network [OSTI]

    Gonzalez, Salvador

    Background Painless, rapid, controlled, minimally invasive molecular transport across human skin for drug delivery and analyte acquisition is of widespread interest. Creation of microconduits through the stratum corneum ...

  4. The dynamical mass ejection from binary neutron star mergers: Radiation-hydrodynamics study in general relativity

    E-Print Network [OSTI]

    Sekiguchi, Yuichiro; Kyutoku, Koutarou; Shibata, Masaru

    2015-01-01T23:59:59.000Z

    We perform radiation-hydrodynamics simulations of binary neutron star mergers in numerical relativity on the Japanese "K" supercomputer, taking into account neutrino cooling and heating by an updated leakage-plus-transfer scheme for the first time. Neutron stars are modeled by three modern finite-temperature equations of state (EOS) developed by Hempel and his collaborators. We find that the electron fraction has a broad distribution due to the weak processes and shock heating. The properties of the ejecta such as total mass, average electron fraction, and thermal energy depend strongly on the EOS. Only for a soft EOS (the so-called SFHo), the ejecta mass exceeds $0.01M_{\\odot}$. In this case, the electron fraction has a broad distribution which is well-suited for the production of the solar-like $r$-process abundance. For the other stiff EOS (DD2 and TM1), for which a long-lived massive neutron star is formed after the merger, the ejecta mass is smaller than $0.01M_{\\odot}$, although broad electron-fraction ...

  5. BRIGHT BROADBAND AFTERGLOWS OF GRAVITATIONAL WAVE BURSTS FROM MERGERS OF BINARY NEUTRON STARS

    SciTech Connect (OSTI)

    Gao He; Ding Xuan; Wu Xuefeng [Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210008 (China); Zhang Bing [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States); Dai Zigao, E-mail: xfwu@pmo.ac.cn, E-mail: zhang@physics.unlv.edu, E-mail: dzg@nju.edu.cn [School of Astronomy and Space Science, Nanjing University, Nanjing 210093 (China)

    2013-07-10T23:59:59.000Z

    If double neutron star mergers leave behind a massive magnetar rather than a black hole, then a bright early afterglow can follow the gravitational wave burst (GWB) even if there is no short gamma-ray burst (SGRB)-GWB association or if there is an association but the SGRB does not beam toward Earth. Besides directly dissipating the proto-magnetar wind, as suggested by Zhang, here we suggest that the magnetar wind could push the ejecta launched during the merger process and, under certain conditions, would reach a relativistic speed. Such a magnetar-powered ejecta, when interacting with the ambient medium, would develop a bright broadband afterglow due to synchrotron radiation. We study this physical scenario in detail and present the predicted X-ray, optical, and radio light curves for a range of magnetar and ejecta parameters. We show that the X-ray and optical light curves usually peak around the magnetar spin-down timescale ({approx}10{sup 3}-10{sup 5} s), reaching brightnesses readily detectable by wide-field X-ray and optical telescopes, and remain detectable for an extended period. The radio afterglow peaks later, but is much brighter than the case without a magnetar energy injection. Therefore, such bright broadband afterglows, if detected and combined with GWBs in the future, would be a probe of massive millisecond magnetars and stiff equations of state for nuclear matter.

  6. Short gamma-ray bursts from binary neutron star mergers: the time-reversal scenario

    E-Print Network [OSTI]

    Ciolfi, Riccardo

    2015-01-01T23:59:59.000Z

    After decades of observations the physical mechanisms that generate short gamma-ray bursts (SGRBs) still remain unclear. Observational evidence provides support to the idea that SGRBs originate from the merger of compact binaries, consisting of two neutron stars (NSs) or a NS and a black hole (BH). Theoretical models and numerical simulations seem to converge to an explanation in which the central engine of SGRBs is given by a spinning BH surrounded by a hot accretion torus. Such a BH-torus system can be formed in compact binary mergers and is able to launch a relativistic jet, which can then produce the SGRB. This basic scenario, however, has recently been challenged by Swift satellite observations, which have revealed long-lasting X-ray afterglows in association with a large fraction of SGRB events. The long durations of these afterglows (from minutes to several hours) cannot be explained by the $\\sim\\text{s}$ accretion timescale of the torus onto the BH, and, instead, suggest a long-lived NS as the persist...

  7. Modeling the dynamics of tidally-interacting binary neutron stars up to merger

    E-Print Network [OSTI]

    Sebastiano Bernuzzi; Alessandro Nagar; Tim Dietrich; Thibault Damour

    2015-02-18T23:59:59.000Z

    The data analysis of the gravitational wave signals emitted by coalescing neutron star binaries requires the availability of an accurate analytical representation of the dynamics and waveforms of these systems. We propose an effective-one-body (EOB) model that describes the general relativistic dynamics of neutron star binaries from the early inspiral up to merger. Our EOB model incorporates an enhanced attractive tidal potential motivated by recent analytical advances in the post-Newtonian and gravitational self-force description of relativistic tidal interactions. No fitting parameters are introduced for the description of tidal interaction in the late, strong-field dynamics. We compare the model energetics and the gravitational wave phasing with new high-resolution multi-orbit numerical relativity simulations of equal-mass configurations with different equations of state. We find agreement within the uncertainty of the numerical data for all configurations. Our model is the first semi-analytical model which captures the tidal amplification effects close to merger. It thereby provides the most accurate analytical representation of binary neutron star dynamics and waveforms currently available.

  8. Isotropic Detectable X-ray Counterparts to Gravitational Waves from Neutron Star Binary Mergers

    E-Print Network [OSTI]

    Shota Kisaka; Kunihito Ioka; Takashi Nakamura

    2015-06-05T23:59:59.000Z

    Neutron star binary mergers are strong sources of gravitational waves (GWs). Promising electromagnetic counterparts are short gamma-ray bursts (GRBs) but the emission is highly collimated. We propose that the scattering of the long-lasting plateau emission in short GRBs by the merger ejecta produces nearly isotropic emission for $\\sim 10^4$ s with flux $10^{-10}-10^{-13}$ erg cm$^{-2}$ s$^{-1}$ in X-ray. This is detectable by wide field X-ray detectors such as ISS-Lobster, eROSITA and WF-MAXI, which are desired by the infrared and optical follow-ups to localize and measure the distance to the host galaxy. The scattered X-rays obtain linear polarization, which correlates with the jet direction, X-ray luminosity and GW polarizations. The activity of plateau emission is also a natural energy source of a macronova (or kilonova) detected in short GRB 130603B without the $r$-process radioactivity.

  9. Isotropic Detectable X-ray Counterparts to Gravitational Waves from Neutron Star Binary Mergers

    E-Print Network [OSTI]

    Kisaka, Shota; Nakamura, Takashi

    2015-01-01T23:59:59.000Z

    Neutron star binary mergers are strong sources of gravitational waves (GWs). Promising electromagnetic counterparts are short gamma-ray bursts (GRBs) but the emission is highly collimated. We propose that the scattering of the long-lasting plateau emission in short GRBs by the merger ejecta produces nearly isotropic emission for $\\sim 10^4$ s with flux $10^{-10}-10^{-13}$ erg cm$^{-2}$ s$^{-1}$ in X-ray. This is detectable by wide field X-ray detectors such as ISS-Lobster, eROSITA and WF-MAXI, which are desired by the infrared and optical follow-ups to localize and measure the distance to the host galaxy. The scattered X-rays obtain linear polarization, which correlates with the jet direction, X-ray luminosity and GW polarizations. The activity of plateau emission is also a natural energy source of a macronova (or kilonova) detected in short GRB 130603B without the $r$-process radioactivity.

  10. Reverse Shock Emission and Ionization Break Out Powered by Post-merger Millisecond Magnetars

    E-Print Network [OSTI]

    Wang, Ling-Jun; Yu, Yun-Wei

    2015-01-01T23:59:59.000Z

    There is accumulating evidence that at least a fraction of binary neutron star mergers result in rapidly spinning magnetars, with subrelativistic neutron-rich ejecta as massive as a small fraction of solar mass. The ejecta could be heated continuously by the Poynting flux emanated from the central magnetars. Such Poynting flux could become lepton-dominated so that a reverse shock develops. It was demonstrated that such a picture is capable of accounting for the optical transient PTF11agg (Wang & Dai 2013b). In this paper we investigate the X-ray and ultraviolet (UV) radiation as well as the optical and radio radiation studied by Wang & Dai (2013b). UV emission is particularly important because it has the right energy to ionize the hot ejecta at times $t\\lesssim 600$ s. It is thought that the ejecta of binary neutron star mergers are a remarkably pure sample of r-process material, about which our understanding is still incomplete. In this paper we evaluate the possibility of observationally determining...

  11. 3D spectroscopy with VLT/GIRAFFE - II: Are Luminous Compact Galaxies merger remnants ?

    E-Print Network [OSTI]

    M. Puech; F. Hammer; H. Flores; G. Ostlin; T. Marquart

    2006-03-21T23:59:59.000Z

    Luminous Compact Galaxies are enigmatic sources by many aspects. They can reach the luminosity of the Milky Way within a radius of only a few kpc. They also represent one of the most rapidly evolving populations of galaxies since they represent up to 1/5 of the luminous galaxies at redshift z= 0.7 while being almost absent in the local Universe. The measurement of their dynamics is crucial to our understanding of LCGs since this has the potential of telling us which physical process(es) that drives them, and ultimately to link them to the existing present-day galaxies. Here we derive the 3 dimensional velocity fields and velocity dispersion (sigma) maps of 17 Luminous Compact Galaxies selected from the Canada France Redshift Survey and the Hubble Deep Field South with redshifts ranging from z=0.4 to z=0.75. We find that only 18% of them show rotational velocity fields typical of rotating disks, the others showing more complex kinematics. Assuming that LCGs are not too far from equilibrium, about half of LCGs then appear to be either non-relaxed objects, or objects that are not supported by velocity dispersion alone. This supports the view that an important fraction of LCGs are probably mergers. It brings additional support to the ``spiral rebuilding scenario'' in which LCGs correspond to a previous or post-merger phase before the disk re-building.

  12. Small mass plunging into a Kerr black hole: Anatomy of the inspiral-merger-ringdown waveforms

    E-Print Network [OSTI]

    Andrea Taracchini; Alessandra Buonanno; Gaurav Khanna; Scott A. Hughes

    2014-04-07T23:59:59.000Z

    We numerically solve the Teukolsky equation in the time domain to obtain the gravitational-wave emission of a small mass inspiraling and plunging into the equatorial plane of a Kerr black hole. We account for the dissipation of orbital energy using the Teukolsky frequency-domain gravitational-wave fluxes for circular, equatorial orbits, down to the light-ring. We consider Kerr spins $-0.99 \\leq q \\leq 0.99$, and compute the inspiral-merger-ringdown (2,2), (2,1), (3,3), (3,2), (4,4), and (5,5) modes. We study the large-spin regime, and find a great simplicity in the merger waveforms, thanks to the extremely circular character of the plunging orbits. We also quantitatively examine the mixing of quasinormal modes during the ringdown, which induces complicated amplitude and frequency modulations in the waveforms. Finally, we explain how the study of small mass-ratio black-hole binaries helps extending effective-one-body models for comparable-mass, spinning black-hole binaries to any mass ratio and spin magnitude.

  13. Outflows from accretion disks formed in neutron star mergers: effect of black hole spin

    E-Print Network [OSTI]

    Rodrigo Fernández; Daniel Kasen; Brian D. Metzger; Eliot Quataert

    2014-10-09T23:59:59.000Z

    The accretion disk that forms after a neutron star merger is a source of neutron-rich ejecta. The ejected material contributes to a radioactively-powered electromagnetic transient, with properties that depend sensitively on the composition of the outflow. Here we investigate how the spin of the black hole remnant influences mass ejection on the thermal and viscous timescales. We carry out two-dimensional, time-dependent hydrodynamic simulations of merger remnant accretion disks including viscous angular momentum transport and approximate neutrino self-irradiation. The gravity of the spinning black hole is included via a pseudo-Newtonian potential. We find that a disk around a spinning black hole ejects more mass, up to a factor of several, relative to the non-spinning case. The enhanced mass loss is due to energy release by accretion occurring deeper in the gravitational potential, raising the disk temperature and hence the rate of viscous heating in regions where neutrino cooling is ineffective. The mean electron fraction of the outflow increases moderately with BH spin due to a highly-irradiated (though not neutrino-driven) wind component. While the bulk of the ejecta is still very neutron-rich, thus generating heavy r-process elements, the leading edge of the wind contains a small amount of Lanthanide-free material. This component can give rise to a ~1 day blue optical `bump' in a kilonova light curve, even in the case of prompt BH formation, which may facilitate its detection.

  14. Spent nuclear fuel Canister Storage Building CDR Review Committee report

    SciTech Connect (OSTI)

    Dana, W.P.

    1995-12-01T23:59:59.000Z

    The Canister Storage Building (CSB) is a subproject under the Spent Nuclear Fuels Major System Acquisition. This subproject is necessary to design and construct a facility capable of providing dry storage of repackaged spent fuels received from K Basins. The CSB project completed a Conceptual Design Report (CDR) implementing current project requirements. A Design Review Committee was established to review the CDR. This document is the final report summarizing that review

  15. Essays on horizontal merger simulation: the curse of dimensionality, retail price discrimination, and supply channel stage-games 

    E-Print Network [OSTI]

    Pofahl, Geoffrey Michael

    2007-04-25T23:59:59.000Z

    In the words of Joel I. Klein, former Assistant Attorney General of the United States, âÂ?Â?[a]ntitrust enforcement in the merger area has never been as time-consuming, complex, or as central to the functioning of our economy as it is todayâÂ?Â...

  16. On the fragility of nuclear stellar discs against galaxy mergers: surviving photometric and kinematic signatures of nuclear discs

    E-Print Network [OSTI]

    Sarzi, M; Dotti, M

    2015-01-01T23:59:59.000Z

    Nuclear stellar discs (NSDs) can help to constrain the assembly history of their host galaxies, as long as we can assume them to be fragile structures that are disrupted during merger events. In this work we investigate the fragility of NSDs by means of N-body simulations reproducing the last phases of a galaxy encounter, when the nuclear regions of the two galaxies merge. For this, we exposed a NSD set in the gravitational potential of the bulge and supermassive black hole of a primary galaxy to the impact of the supermassive black hole from a secondary galaxy. We explored merger events of different mass ratios, from major mergers with a 1:1 mass ratio to intermediate and minor interactions with 1:5 and 1:10 ratios, while considering various impact geometries. We analyse the end results of such mergers from different viewing angles and looked for possible photometric and kinematic signatures of the presence of a disc in the remnant surface density and velocity maps, while adopting detection limits from real ...

  17. Neutron star mergers versus core-collapse supernovae as dominant r-process sites in the early Galaxy

    E-Print Network [OSTI]

    D. Argast; M. Samland; F. -K. Thielemann; Y. -Z. Qian

    2003-09-08T23:59:59.000Z

    The astrophysical nature of r-process sites is a long standing mystery and many probable sources have been suggested in the past, among them lower-mass core-collapse supernovae (in the range 8 - 10 Msol), higher-mass core-collapse supernovae (with masses > 20 Msol) and neutron star mergers. In this work, we present a detailed inhomogeneous chemical evolution study that considers for the first time neutron star mergers as major r-process sources, and compare this scenario to the ones in which core-collapse supernovae act as dominant r-process sites. We conclude that, due to the lack of reliable iron and r-process yields as function of progenitor mass, it is not possible at present to distinguish between the lower-mass and higher-mass supernovae scenarios within the framework of inhomogeneous chemical evolution. However, neutron-star mergers seem to be ruled out as the dominant r-process source, since their low rates of occurrence would lead to r-process enrichment that is not consistent with observations at very low metallicities. Additionally, the considerable injection of r-process material by a single neutron-star merger leads to a scatter in [r-process/Fe] ratios at later times which is much too large compared to observations.

  18. A Physical Approach to the Identification of High-z Mergers: Morphological Classification in the Stellar Mass Domain

    E-Print Network [OSTI]

    Cibinel, Anna; Perret, Valentin; Bournaud, Frederic; Daddi, Emanuele; Pannella, Maurilio; Elbaz, David; Amram, Philippe; Duc, Pierre-Alain

    2015-01-01T23:59:59.000Z

    At z>1, the distinction between merging and 'normal' star-forming galaxies based on single band morphology is often hampered by the presence of large clumps which result in a disturbed, merger-like appearance even in rotationally supported disks. In this paper we discuss how a classification based on canonical, non-parametric structural indices measured on resolved stellar mass maps, rather than on single-band images, reduces the misclassification of clumpy but not merging galaxies. We calibrate the mass-based selection of mergers using the MIRAGE hydrodynamical numerical simulations of isolated and merging galaxies which span a stellar mass range of $10^{9.8}$-$10^{10.6}M_{sun}$ and merger ratios between 1:1-1:6.3. These simulations are processed to reproduce the typical depth and spatial resolution of observed HUDF data. We test our approach on a sample of real z~2 galaxies with kinematic classification into disks or mergers and on ~100 galaxies in the HUDF field with photometric/spectroscopic redshift betw...

  19. Wireless Geophone Networks (WGN) for high density land acquisitions*

    E-Print Network [OSTI]

    Savazzi, Stefano

    on the grid size and the particular acquisition geometry (e.g., the intervals among two receivers is limited as for multiple micro-line based geometries in figure 1. These limiting constraints suggest the adoption of an acquisition system that do not rely on cables. Receiver line Sub-surface Storage UnitShot Point Geophone Sub

  20. Cost-Constrained Data Acquisition for Intelligent Data Preparation

    E-Print Network [OSTI]

    Wu, Xindong

    Cost-Constrained Data Acquisition for Intelligent Data Preparation Xingquan Zhu, Member, IEEE to the significant cost of doing so and the inherent correlations in the data set, acquiring correct information attribute costs and the relevance of each attribute to the target concept, so that the data acquisition can

  1. Multiple channel optical data acquisition system

    DOE Patents [OSTI]

    Fasching, G.E.; Goff, D.R.

    1985-02-22T23:59:59.000Z

    A multiple channel optical data acquisition system is provided in which a plurality of remote sensors monitoring specific process variable are interrogated by means of a single optical fiber connecting the remote station/sensors to a base station. The remote station/sensors derive all power from light transmitted through the fiber from the base station. Each station/sensor is individually accessed by means of a light modulated address code sent over the fiber. The remote station/sensors use a single light emitting diode to both send and receive light signals to communicate with the base station and provide power for the remote station. The system described can power at least 100 remote station/sensors over an optical fiber one mile in length.

  2. MTX data acquisition and analysis computer network

    SciTech Connect (OSTI)

    Butner, D.N.; Casper, T.A.; Brown, M.D.; Drlik, M.; Meyer, W.H.; Moller, J.M. (Lawrence Livermore National Laboratory, University of California, Livermore, CA (USA))

    1990-10-01T23:59:59.000Z

    For the MTX experiment, we use a network of computers for plasma diagnostic data acquisition and analysis. This multivendor network employs VMS, UNIX, and BASIC based computers connected in a local area Ethernet network. Some of the data is acquired directly into a VAX/VMS computer cluster over a fiber-optic serial CAMAC highway. Several HP-Unix workstations and HP-BASIC instrument control computers acquire and analyze data for the more data intensive or specialized diagnostics. The VAX/VMS system is used for global analysis of the data and serves as the central data archiving and retrieval manager. Shot synchronization and control of data flow are implemented by task-to-task message passing using our interprocess communication system. The system has been in operation during our initial MTX tokamak and FEL experiments; it has operated reliably with data rates typically in the range of 5 Mbytes/shot without limiting the experimental shot rate.

  3. Off-Center Mergers of Clusters of Galaxies and Nonequipartition of Electrons and Ions in Intracluster Medium

    E-Print Network [OSTI]

    Motokazu Takizawa

    1999-10-25T23:59:59.000Z

    We investigate the dynamical evolution of clusters of galaxies and their observational consequences during off-center mergers, explicitly considering the relaxation process between ions and electrons in intracluster medium by N-body and hydrodynamical simulations. In the contracting phase a bow shock is formed between the two subclusters. The observed temperature between two peaks in this phase depends on the viewing angle even if the geometry of the system seems to be very simple like head-on collisions. Around the most contracting epoch, when we observe merging clusters nearly along the collision axis, they look like spherical relaxed clusters with large temperature gradients. In the expanding phase, spiral bow shocks occur. As in head-on mergers, the electron temperature is significantly lower than the plasma mean one especially in the post-shock regions in the expanding phase. When the systems have relatively large angular momentum, double-peak structures in the X-ray images can survive even after the most contracting epoch. Morphological features in both X-ray images and electron temperature distribution characteristic to off-center mergers are seriously affected by the viewing angle. When the clusters are observed nearly along the collision axis, the distribution of galaxies' line-of-sight (LOS) velocities is a good indicator of mergers. In the contracting phase, an negative kurtosis and a large skewness are expected for nearly equal mass collisions and rather different mass ones, respectively. To obtain statistically significant results, about 1000 galaxies' LOS velocities are required. For nearby clusters ($z<0.05$), large redshift surveys such as 2dF will enable us to study merger dynamics.

  4. Fast and accurate prediction of numerical relativity waveforms from binary black hole mergers using surrogate models

    E-Print Network [OSTI]

    Blackman, Jonathan; Galley, Chad R; Szilagyi, Bela; Scheel, Mark A; Tiglio, Manuel; Hemberger, Daniel A

    2015-01-01T23:59:59.000Z

    Simulating a binary black hole coalescence by solving Einstein's equations is computationally expensive, requiring days to months of supercomputing time. In this paper, we construct an accurate and fast-to-evaluate surrogate model for numerical relativity (NR) waveforms from non-spinning binary black hole coalescences with mass ratios from $1$ to $10$ and durations corresponding to about $15$ orbits before merger. Our surrogate, which is built using reduced order modeling techniques, is distinct from traditional modeling efforts. We find that the full multi-mode surrogate model agrees with waveforms generated by NR to within the numerical error of the NR code. In particular, we show that our modeling strategy produces surrogates which can correctly predict NR waveforms that were {\\em not} used for the surrogate's training. For all practical purposes, then, the surrogate waveform model is equivalent to the high-accuracy, large-scale simulation waveform but can be evaluated in a millisecond to a second dependin...

  5. On the robustness of the r-process in neutron-star mergers

    E-Print Network [OSTI]

    Joel de Jesús Mendoza-Temis; G. Martínez-Pinedo; K. Langanke; A. Bauswein; H. -T. Janka

    2014-09-22T23:59:59.000Z

    We have performed r-process simulations for a set of trajectories describing matter ejected in neutron star mergers. Our calculations consider an extended nuclear network, including spontaneous, $\\beta$- and neutron-induced fission and adopting fission yield distributions from the ABLA code. In particular we have studied the sensitivity of the r-process abundances on the nuclear mass models by using different models. We find that the general features of the observed r-process abundance distribution (the second and third peaks, the rare-earth peak and the lead peak) are reproduced by our simulations, independently of the merger trajectory, and for all mass models. We find distinct differences in the predictions of the mass models at and just above the third peak, which can be traced back to different predictions of neutron separation energies for r-process nuclei around neutron number N=130. In all simulations, we find that the second peak around $A\\sim 130$ is produced by the fission yields of the material that piles up in nuclei with $A\\gtrsim 250$ due to the substantially longer beta-decay half-lives found in this region. The third peak around $A \\sim 195$ is generated in a competition between neutron captures and $\\beta$ decays during r-process freeze-out. We find that at timescales of weeks relevant for kilonova light curve calculations, the abundance of actinides is larger than the one of lanthanides. This means that actinides can be even more important than lanthanides to determine the photon opacities under kilonova conditions.

  6. On the Properties of Hypermassive Neutron Stars Formed in Mergers of Spinning Binaries

    E-Print Network [OSTI]

    Wolfgang Kastaun; Filippo Galeazzi

    2014-11-28T23:59:59.000Z

    We present numerical simulations of binary neutron star (BNS) mergers, comparing irrotational binaries to binaries of NSs rotating aligned to the orbital angular momentum. For the first time, we study spinning BNSs employing nuclear physics equations of state (EOS), namely the ones of Lattimer & Swesty as well as Shen & Horowitz & Teige. We study mainly equal mass systems leading to a hypermassive neutron star (HMNS), and analyze in detail its structure and dynamics. In order to exclude gauge artifacts, we introduce a novel coordinate system used for post-processing. The results for our equal mass models show that the strong radial oscillations of the HMNS modulate the instantaneous frequency of the gravitational wave (GW) signal to an extend that leads to separate peaks in the corresponding Fourier spectrum. In particular, the high frequency peaks which are often attributed to combination frequencies can also be caused by the modulation of the m=2 mode frequency in the merger phase. As a consequence for GW data analysis, the offset of the high frequency peak does not necessarily carry information about the radial oscillation frequency. Further, the low frequency peak in our simulations is dominated by the contribution of the plunge and the first 1-2 bounces. The amplitude of the radial oscillations depends on the initial NS spin, which therefore has a complicated influence on the spectrum. Another important result is that HMNSs can consist of a slowly rotating core with an extended, massive envelope rotating close to Keplerian velocity, contrary to the common notion that a rapidly rotating core is necessary to prevent a prompt collapse. Finally, our estimates on the amount of unbound matter show a dependency on the initial NS spin, explained by the influence of the latter on the amplitude of radial oscillations, which in turn cause shock waves.

  7. TIDAL TAIL EJECTION AS A SIGNATURE OF TYPE Ia SUPERNOVAE FROM WHITE DWARF MERGERS

    SciTech Connect (OSTI)

    Raskin, Cody; Kasen, Daniel [Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA (United States)

    2013-07-20T23:59:59.000Z

    The merger of two white dwarfs may be preceded by the ejection of some mass in ''tidal tails,'' creating a circumstellar medium around the system. We consider the variety of observational signatures from this material, which depend on the lag time between the start of the merger and the ultimate explosion (assuming one occurs) of the system in a Type Ia supernova (SN Ia). If the time lag is fairly short, then the interaction of the supernova ejecta with the tails could lead to detectable shock emission at radio, optical, and/or X-ray wavelengths. At somewhat later times, the tails produce relatively broad NaID absorption lines with velocity widths of the order of the white dwarf escape speed ({approx}1000 km s{sup -1}). That none of these signatures have been detected in normal SNe Ia constrains the lag time to be either very short ({approx}< 100 s) or fairly long ({approx}> 100 yr). If the tails have expanded and cooled over timescales {approx}10{sup 4} yr, then they could be observable through narrow NaID and Ca II H and K absorption lines in the spectra, which are seen in some fraction of SNe Ia. Using a combination of three-dimensional and one-dimensional hydrodynamical codes, we model the mass loss from tidal interactions in binary systems, and the subsequent interactions with the interstellar medium, which produce a slow-moving, dense shell of gas. We synthesize NaID line profiles by ray casting through this shell, and show that in some circumstances tidal tails could be responsible for narrow absorptions similar to those observed.

  8. Policy Flash 2014-33 Revised Department of Energy (DOE) Acquisition...

    Office of Environmental Management (EM)

    of Energy (DOE) Acquisition Guide Chapter 7.2 Strategic Sourcing Requirements Policy Flash 2014-33 Revised Department of Energy (DOE) Acquisition Guide Chapter 7.2...

  9. Policy Flash 2013-39 Acquisition Guide, Chapter 42.15, Contractor...

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

    9 Acquisition Guide, Chapter 42.15, Contractor Performance Information Policy Flash 2013-39 Acquisition Guide, Chapter 42.15, Contractor Performance Information Attached is Policy...

  10. Policy Flash 2013-64 Acquisition Letter 10 and Class Deviation...

    Energy Savers [EERE]

    4 Acquisition Letter 10 and Class Deviation for Nondisplacement of Qualified Workers Policy Flash 2013-64 Acquisition Letter 10 and Class Deviation for Nondisplacement of Qualified...

  11. The valuation of construction companies

    E-Print Network [OSTI]

    Sassine, Edmond, 1980-

    2004-01-01T23:59:59.000Z

    The main objective of this thesis is to study the valuation of construction companies in mergers and acquisitions. The thesis is divided into three main parts; Mergers and Acquisitions, Valuation, and a Case Study. Mergers ...

  12. Acquisition Career Management Program (Informational Purposes Only)

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

    2014-11-21T23:59:59.000Z

    This draft has been scheduled for final review before the Directives Review Board on 4-2-15 (delayed from 12-4-14 session). All major comments and concerns should be provided to your DRB representative, following your organization process. If you do not know who your representative is, please see the list of DRB members at https://www.directives.doe.gov/beta/references/directives-review-board. If your office is represented by Ingrid Kolb, Director, Office of Management, please submit your major concerns and comments to the DRB Liaison, Camille Beben (Camille.Beben@hq.doe.gov; 202-586-4014). All major comments and concerns should be submitted by COB 3-31-15.

  13. A nuclear data acquisition system flow control model

    SciTech Connect (OSTI)

    Hack, S.N.

    1988-02-01T23:59:59.000Z

    A general Petri Net representation of a nuclear data acquisition system model is presented. This model provides for the unique requirements of a nuclear data acquisition system including the capabilities of concurrently acquiring asynchronous and synchronous data, of providing multiple priority levels of flow control arbitration, and of permitting multiple input sources to reside at the same priority without the problem of channel lockout caused by a high rate data source. Finally, a previously implemented gamma camera/physiological signal data acquisition system is described using the models presented.

  14. Pseudo-Newtonian simulations of black hole-neutron star mergers as possible progenitors of short-duration gamma-ray bursts 

    E-Print Network [OSTI]

    Sriskantha, Hari Haran

    2014-11-27T23:59:59.000Z

    Black hole-neutron star (BH-NS) mergers are promising candidates for the progenitors of short-duration gamma-ray bursts (GRBs). With the right initial conditions, the neutron star becomes tidally disrupted, eventually ...

  15. Complete information acquisition in scanning probe microscopy

    SciTech Connect (OSTI)

    Belianinov, Alex [ORNL; Kalinin, Sergei V [ORNL; Jesse, Stephen [ORNL

    2015-01-01T23:59:59.000Z

    In the last three decades, scanning probe microscopy (SPM) has emerged as a primary tool for exploring and controlling the nanoworld. A critical part of the SPM measurements is the information transfer from the tip-surface junction to a macroscopic measurement system. This process reduces the many degrees of freedom of a vibrating cantilever to relatively few parameters recorded as images. Similarly, the details of dynamic cantilever response at sub-microsecond time scales of transients, higher-order eigenmodes and harmonics are averaged out by transitioning to millisecond time scale of pixel acquisition. Hence, the amount of information available to the external observer is severely limited, and its selection is biased by the chosen data processing method. Here, we report a fundamentally new approach for SPM imaging based on information theory-type analysis of the data stream from the detector. This approach allows full exploration of complex tip-surface interactions, spatial mapping of multidimensional variability of material s properties and their mutual interactions, and SPM imaging at the information channel capacity limit.

  16. Acquisition Letter 2009-03 Acquisition Planning-Extending A Management and

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions

  17. Language acquisition and implication for language change: A computational model. 

    E-Print Network [OSTI]

    Clark, Robert A J

    1997-01-01T23:59:59.000Z

    Computer modeling techniques, when applied to language acquisition problems, give an often unrealized insight into the diachronic change that occurs in language over successive generations. This paper shows that using ...

  18. NOVA-NREL Optimal Vehicle Acquisition Analysis (Brochure)

    SciTech Connect (OSTI)

    Blakley, H.

    2011-03-01T23:59:59.000Z

    Federal fleet managers face unique challenges in accomplishing their mission - meeting agency transportation needs while complying with Federal goals and mandates. Included in these challenges are a variety of statutory requirements, executive orders, and internal goals and objectives that typically focus on petroleum consumption and greenhouse gas (GHG) emissions reductions, alternative fuel vehicle (AFV) acquisitions, and alternative fuel use increases. Given the large number of mandates affecting Federal fleets and the challenges faced by all fleet managers in executing day-to-day operations, a primary challenge for agencies and other organizations is ensuring that they are as efficient as possible in using constrained fleet budgets. An NREL Optimal Vehicle Acquisition (NOVA) analysis makes use of a mathematical model with a variety of fleet-related data to create an optimal vehicle acquisition strategy for a given goal, such as petroleum or GHG reduction. The analysis can helps fleets develop a vehicle acquisition strategy that maximizes petroleum and greenhouse gas reductions.

  19. Policy Flash 2013-23 Department of Energy Acquisition Regulation...

    Energy Savers [EERE]

    Policy Flash 2013-23 Department of Energy Acquisition Regulation (DEAR) Final Rule for changes to Parts 908, 945, 952, and 970 regarding Government Property Policy Flash 2013-23...

  20. The Icecube Data Acquisition Software: Lessons Learned During Distributed, Collaborative,

    E-Print Network [OSTI]

    Geddes, Cameron Guy Robinson

    The Icecube Data Acquisition Software: Lessons Learned During Distributed, Collaborative, Multi@mail.npxdesigns.com, CPMcParland@lbl.gov, SJPatton@lbl.gov Abstract. In this experiential paper we report on lessons learned

  1. The Department of the Navy's Research Development and Acquisition Community

    E-Print Network [OSTI]

    The Department of the Navy's Research Development and Acquisition Community Efforts to Achieve the Navy's Energy Goals Enabling Energy Security Strategic Directions Dr. John V. Amy, Jr. ASN (RDA) CHSENG

  2. acquisition system based: Topics by E-print Network

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

    Index 1 The Data Acquisition System Based on PMC Bus CERN Preprints Summary: High energy physics experiments in KEKJapan rush into over KHz trigger stage. Thus, we need a...

  3. New horizons in the study of child language acquisition

    E-Print Network [OSTI]

    Roy, Deb K.

    Naturalistic longitudinal recordings of child development promise to reveal fresh perspectives on fundamental questions of language acquisition. In a pilot effort, we have recorded 230,000 hours of audio-video recordings ...

  4. The articulatory basis of positional asymmetries in phonological acquisition

    E-Print Network [OSTI]

    McAllister, Tara Kathleen

    2009-01-01T23:59:59.000Z

    Child phonological processes that lack counterparts in adult phonological typology have long posed a problem for formal modeling of phonological acquisition. This dissertation investigates child-specific processes with a ...

  5. Page 1 of 3 Acquisition Services Management (ASM) Division

    E-Print Network [OSTI]

    Page 1 of 3 Acquisition Services Management (ASM) Division Subcontracts, ASM-SUB P.O. Box 1663 within the benchmark codes require numbers of MPI ranks which are not practical on a single node

  6. National Ignition Facility project acquisition plan revision 1

    SciTech Connect (OSTI)

    Clobes, A.R.

    1996-10-01T23:59:59.000Z

    The purpose of this National Ignition Facility Acquisition Plan is to describe the overall procurement strategy planned for the National Ignition Facility M Project. It was prepared for the NIP Prood Office by the NIF Procurement Manager.

  7. Project Management for the Acquisition of Capital Assets

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

    2003-03-28T23:59:59.000Z

    The purpose of this Manual is to provide requirements and guidance to Department of Energy (DOE) employees, including National Nuclear Security Administration (NNSA) employees on the planning and acquisition of capital assets. Does not cancel other directives.

  8. acquisition methods trends: Topics by E-print Network

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

    suite of tools and a methodology for building knowledge-based systems and domain-specific knowledge-acquisition tools. In this paper, we show how PROTG-II can be applied to the...

  9. Chapter 1 - Acquisition Regulations System | Department of Energy

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

    1.1AcquisitionRegulationSystem0.pdf 1.2HeadofContractingActivity(HCA)Authority,Functions,andResponsibilities0.pdf 1.2AttachmentTablesI-IV0.pdf...

  10. Microsoft Word - West Swan_Acquisition_CX_10212010.doc

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

    Funding the acquisition by the State of Montana of habitat in the West Swan Valley. Fish and Wildlife Project No.: 2008-800-00, Contract BPA-45235 Categorical Exclusion...

  11. Graphical user interface for image acquisition and processing

    DOE Patents [OSTI]

    Goldberg, Kenneth A. (Berkeley, CA)

    2002-01-01T23:59:59.000Z

    An event-driven GUI-based image acquisition interface for the IDL programming environment designed for CCD camera control and image acquisition directly into the IDL environment where image manipulation and data analysis can be performed, and a toolbox of real-time analysis applications. Running the image acquisition hardware directly from IDL removes the necessity of first saving images in one program and then importing the data into IDL for analysis in a second step. Bringing the data directly into IDL creates an opportunity for the implementation of IDL image processing and display functions in real-time. program allows control over the available charge coupled device (CCD) detector parameters, data acquisition, file saving and loading, and image manipulation and processing, all from within IDL. The program is built using IDL's widget libraries to control the on-screen display and user interface.

  12. Acquisition Costs and Nutritional Data on Great Basin Resources

    E-Print Network [OSTI]

    Simms, Steven R

    1985-01-01T23:59:59.000Z

    parching. Animals Handling-cost data for animals were gener-Presentation of search-cost data and examples are beyond theACQUISITION COST AND NUTRITIONAL DATA Minor, Rick, and Ruth

  13. Decision-making processes in shipping acquisitions and shipbuilding

    E-Print Network [OSTI]

    Maroulis, Vasileios

    2004-01-01T23:59:59.000Z

    The purpose of this thesis is to expand and analyze the decisions that are constantly being made by shipping companies concerning acquisition of newbuildings, the construction of newbuildings, operational aspects as well ...

  14. Corporate serial acquisitions: An empirical test of the learning hypothesis

    E-Print Network [OSTI]

    Nesterov, Yurii

    2007/23 Corporate serial acquisitions: An empirical test of the learning hypothesis Nihat Aktas: An empirical test of the learning hypothesis Nihat AKTAS1, Eric DE BODT2 and Richard ROLL3 March2007 Abstract

  15. Bayesian Network Analysis of Radiological Dispersal Device Acquisitions

    E-Print Network [OSTI]

    Hundley, Grant Richard

    2012-02-14T23:59:59.000Z

    inflict moderate human casualties and significant economic damage. The vast availability of radioactive sources and the nearly limitless methods of dispersing them demand an inclusive study of the acquisition pathways for an RDD. A complete network...

  16. Snopesism and the tradition of acquisitiveness: a reevaluation

    E-Print Network [OSTI]

    Hower, Debra Kay

    1984-01-01T23:59:59.000Z

    SNOPESISM AND THE TRADITION OF ACQUISITIVE?SS: A REEVALUATION A Thesis by DEBRA RAT HOWER Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of Master of Arts May l9S4 Major... Subject: English SNOPESISM AND THE TRADITION OF ACQUISITIVENESS: A REEVALUATION A Thesis by DEBRA RAY HOWER Approved as to style and content by: William Bedfo d Clark (Chairman of Committee) Claude Gibson (Member) Anne Marie Elmquist (Member...

  17. The data acquisition system for the ANTARES neutrino telescope

    E-Print Network [OSTI]

    Aguilar, J A; Ameli, F; Anghinolfi, M; Anton, G; Anvar, S; Aslanides, E; Aubert, Jean-Jacques; Barbarito, E; Basa, S; Battaglieri, M; Becherini, Y; Bellotti, R; Beltramelli, J; Bertin, V; Bigi, A; Billault, M; Blaes, R; De Botton, N R; Bouwhuis, M C; Bradbury, S M; Bruijn, R; Brunner, J; Burgio, G F; Busto, J; Cafagna, F; Caillat, L; Calzas, A; Capone, A; Caponetto, L; Carmona, E; Carr, J; Cartwright, S L; Castel, D; Castorina, E; Cavasinni, V; Cecchini, S; Ceres, A; Charvis, P; Chauchot, P; Chiarusi, T; Circella, M; Colnard, C; Compere, C; Coniglione, R; Cottini, N; Coyle, P; Cuneo, S; Cussatlegras, A S; Damy, G; Van Dantzig, R; De Marzo, C; Dekeyser, I; Delagnes, E; Denans, D; Deschamps, A; Dessages-Ardellier, F; Destelle, J J; Dinkespieler, B; Distefano, C; Donzaud, C; Drogou, J F; Druillole, F; Durand, D; Ernenwein, J P; Escoffier, S; Falchini, E; Favard, S; Feinstein, F; Ferry, S; Festy, D; Fiorello, C; Flaminio, V; Galeotti, S; Gallone, J M; Giacomelli, G; Girard, N; Gojak, C; Goret, P; Graf, K; Hallewell, G D; Harakeh, M N; Hartmann, B; Heijboer, A; Heine, E; Hello, Y; Hernández-Rey, J J; Hossl, J; Hoffman, C; Hogenbirk, J; Hubbard, John R; Jaquet, M; Jaspers, M; De Jong, M; Jouvenot, F; Kalantar-Nayestanaki, N; Kappes, A; Karg, T; Karkar, S; Katz, U; Keller, P; Kok, H; Kooijman, P; Kopper, C; Korolkova, E V; Kouchner, A; Kretschmer, W; Kruijer, A; Kuch, S; Kudryavtsev, V A; Lachartre, D; Lafoux, H; Lagier, P; Lahmann, R; Lamanna, G; Lamare, P; Languillat, J C; Laschinsky, H; Le Guen, Y; Le Provost, H; Le Van-Suu, A; Legou, T; Lim, G; Lo Nigro, L; Lo Presti, D; Löhner, H; Loucatos, Sotirios S; Louis, F; Lucarelli, F; Lyashuk, V; Marcelin, M; Margiotta, A; Masullo, R; Mazéas, F; Mazure, A; McMillan, J E; Megna, R; Melissas, M; Migneco, E; Milovanovic, A; Mongelli, M; Montaruli, T; Morganti, M; Moscoso, L; Musumeci, M; Naumann, C; Naumann-Godo, M; Niess, V; Olivetto, C; Ostasch, R; Palanque-Delabrouille, Nathalie; Payre, P; Peek, H; Petta, C; Piattelli, P; Pineau, J P; Poinsignon, J; Popa, V; Pradier, T; Racca, C; Randazzo, N; Van Randwijk, J; Real, D; Van Rens, B; Rethore, F; Rewiersma, P A M; Riccobene, G; Rigaud, V; Ripani, M; Roca, V; Roda, C; Rolin, J F; Romita, M; Rose, H J; Rostovtsev, A; Roux, J; Ruppi, M; Russo, G V; Salesa, F; Salomon, K; Sapienza, P; Schmitt, F; Schuller, J P; Shanidze, R; Sokalski, I A; Spona, T; Spurio, M; van der Steenhoven, G; Stolarczyk, T; Streeb, K; Stubert, D; Sulak, L; Taiuti, M; Tamburini, C; Tao, C; Terreni, G; Thompson, L F; Valdy, P; Valente, V; Vallage, B; Venekamp, G; Verlaat, B; Vernin, P; De Vita, R; De Vries, G; Van Wijk, R F; De Witt-Huberts, P K A; Wobbe, G; De Wolf, E; Yao, A F; Zaborov, D; Zaccone, Henri; De Dios-Zornoza-Gomez, Juan; Zúñiga, J; al, et

    2006-01-01T23:59:59.000Z

    The ANTARES neutrino telescope is being constructed in the Mediterranean Sea. It consists of a large three-dimensional array of photo-multiplier tubes. The data acquisition system of the detector takes care of the digitisation of the photo-multiplier tube signals, data transport, data filtering, and data storage. The detector is operated using a control program interfaced with all elements. The design and the implementation of the data acquisition system are described.

  18. Neutron star-black hole mergers with a nuclear equation of state and neutrino cooling: Dependence in the binary parameters

    E-Print Network [OSTI]

    Francois Foucart; M. Brett Deaton; Matthew D. Duez; Evan O'Connor; Christian D. Ott; Roland Haas; Lawrence E. Kidder; Harald P. Pfeiffer; Mark A. Scheel; Bela Szilagyi

    2014-06-19T23:59:59.000Z

    We present a first exploration of the results of neutron star-black hole mergers using black hole masses in the most likely range of $7M_\\odot-10M_\\odot$, a neutrino leakage scheme, and a modeling of the neutron star material through a finite-temperature nuclear-theory based equation of state. In the range of black hole spins in which the neutron star is tidally disrupted ($\\chi_{\\rm BH}\\gtrsim 0.7$), we show that the merger consistently produces large amounts of cool ($T\\lesssim 1\\,{\\rm MeV}$), unbound, neutron-rich material ($M_{\\rm ej}\\sim 0.05M_\\odot-0.20M_\\odot$). A comparable amount of bound matter is initially divided between a hot disk ($T_{\\rm max}\\sim 15\\,{\\rm MeV}$) with typical neutrino luminosity $L_\

  19. Effects of the microphysical Equation of State in the mergers of magnetized Neutron Stars With Neutrino Cooling

    E-Print Network [OSTI]

    Palenzuela, C; Neilsen, D; Lehner, L; Caballero, O L; O'Connor, E; Anderson, M

    2015-01-01T23:59:59.000Z

    We study the merger of binary neutron stars using different realistic, microphysical nuclear equations of state, as well as incorporating magnetic field and neutrino cooling effects. In particular, we concentrate on the influence of the equation of state on the gravitational wave signature and also on its role, in combination with cooling and electromagnetic effects, in determining the properties of the hypermassive neutron star resulting from the merger, the production of neutrinos, and the characteristics of ejecta from the system. The ejecta we find are consistent with other recent studies that find soft equations of state produce more ejecta than stiffer equations of state. Moreover, the degree of neutron richness increases for softer equations of state. In light of reported kilonova observations (associated to GRB~130603B and GRB~060614) and the discovery of relatively low abundances of heavy, radioactive elements in deep sea deposits (with respect to possible production via supernovae), we speculate tha...

  20. Merger rates of double neutron stars and stellar origin black holes: The Impact of Initial Conditions on Binary Evolution Predictions

    E-Print Network [OSTI]

    de Mink, S E

    2015-01-01T23:59:59.000Z

    The initial mass function (IMF), binary fraction and distributions of binary parameters (mass ratios, separations and eccentricities) are indispensable input for simulations of stellar populations. It is often claimed that these are poorly constrained significantly affecting evolutionary predictions. Recently, dedicated observing campaigns provided new constraints on the initial conditions for massive stars. Findings include a larger close binary fraction and a stronger preference for very tight systems. We investigate the impact on the predicted merger rates of neutron stars and black holes. Despite the changes with previous assumptions, we only find an increase of less than a factor 2 (insignificant compared with evolutionary uncertainties of typically a factor 10-100). We further show that the uncertainties in the new initial binary properties do not significantly affect (within a factor of 2) our predictions of double compact object merger rates. An exception is the uncertainty in IMF (variations by a fac...

  1. Exploring binary-neutron-star-merger scenario of short-gamma-ray bursts by gravitational-wave observation

    E-Print Network [OSTI]

    Kenta Kiuchi; Yuichiro Sekiguchi; Masaru Shibata; Keisuke Taniguchi

    2010-02-13T23:59:59.000Z

    We elucidate the feature of gravitational waves (GWs) from binary neutron star merger collapsing to a black hole by general relativistic simulation. We show that GW spectrum imprints the coalescence dynamics, formation process of disk, equation of state for neutron stars, total masses, and mass ratio. A formation mechanism of the central engine of short $\\gamma$-ray bursts, which are likely to be composed of a black hole and surrounding disk, therefore could be constrained by GW observation.

  2. EA-1655: Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development

    Broader source: Energy.gov [DOE]

    Berkeley Lab Laser Accelerator (BELLA) Laser Acquisition, Installation and Use for Research and Development

  3. Post-Acquisition Integration: The Cultural Side of the Ferguson Paper Company, Inc. Acquisition of Seastrand Oil Company, Inc.

    E-Print Network [OSTI]

    Beadleston, Scott K.

    2008-12-19T23:59:59.000Z

    Paper Company, Inc.’s post-acquisition integration efficiency and effectiveness. Research indicated employees’ expectations (e.g., level of integration and synergy level) are difficult to gauge. Employees and integration leaders agreed on the most...

  4. Kinematic classifications of local interacting galaxies: implications for the merger/disk classifications at high-z

    E-Print Network [OSTI]

    Hung, Chao-Ling; Yuan, Tiantian; Larson, Kirsten L; Casey, Caitlin M; Smith, Howard A; Sanders, D B; Kewley, Lisa J; Hayward, Christopher C

    2015-01-01T23:59:59.000Z

    The classification of galaxy mergers and isolated disks is key for understanding the relative importance of galaxy interactions and secular evolution during the assembly of galaxies. The kinematic properties of galaxies as traced by emission lines have been used to suggest the existence of a significant population of high-z star-forming galaxies consistent with isolated rotating disks. However, recent studies have cautioned that post-coalescence mergers may also display disk-like kinematics. To further investigate the robustness of merger/disk classifications based on kinematic properties, we carry out a systematic classification of 24 local (U)LIRGs spanning a range of galaxy morphologies: from isolated spiral galaxies, ongoing interacting systems, to fully merged remnants. We artificially redshift the WiFeS observations of these local (U)LIRGs to z=1.5 to make a realistic comparison with observations at high-z, and also to ensure that all galaxies have the same spatial sampling of ~900 pc. Using both kineme...

  5. High-resolution imaging of the molecular outflows in two mergers: IRAS17208-0014 and NGC1614

    E-Print Network [OSTI]

    Garcia-Burillo, S; Usero, A; Aalto, S; Colina, L; Alonso-Herrero, A; Hunt, L K; Arribas, S; Costagliola, F; Labiano, A; Neri, R; Pereira-Santaella, M; Tacconi, L J; van der Werf, P P

    2015-01-01T23:59:59.000Z

    Galaxy evolution scenarios predict that the feedback of star formation and nuclear activity (AGN) can drive the transformation of gas-rich spiral mergers into ULIRGs, and, eventually, lead to the build-up of QSO/elliptical hosts. We study the role that star formation and AGN feedback have in launching and maintaining the molecular outflows in two starburst-dominated advanced mergers, NGC1614 and IRAS17208-0014, by analyzing the distribution and kinematics of their molecular gas reservoirs. We have used the PdBI array to image with high spatial resolution (0.5"-1.2") the CO(1-0) and CO(2-1) line emissions in NGC1614 and IRAS17208-0014, respectively. The velocity fields of the gas are analyzed and modeled to find the evidence of molecular outflows in these sources and characterize the mass, momentum and energy of these components. While most (>95%) of the CO emission stems from spatially-resolved (~2-3kpc-diameter) rotating disks, we also detect in both mergers the emission from high-velocity line wings that ex...

  6. Red or blue? A potential kilonova imprint of the delay until black hole formation following a neutron star merger

    E-Print Network [OSTI]

    Metzger, Brian D

    2014-01-01T23:59:59.000Z

    Mergers of binary neutron stars (NSs) usually result in the formation of a hypermassive neutron star (HMNS). Whether- and when this remnant collapses to a black hole (BH) depends primarily on the equation of state and on angular momentum transport processes, both of which are uncertain. Here we show that the lifetime of the merger remnant may be directly imprinted in the radioactively powered kilonova emission following the merger. We employ axisymmetric, time-dependent hydrodynamic simulations of remnant accretion disks orbiting a HMNS of variable lifetime, and characterize the effect of this delay to BH formation on the disk wind ejecta. Our models follow the system evolution over several seconds, and include the effect of nuclear recombination, viscous heating, and neutrino irradiation by both the HMNS and the disk. When BH formation is relatively prompt ( 140, resulting in ~week-long emission with a spectral peak in the near-infrared (NIR), similar to that produced by the dynamical ejecta. In contrast, de...

  7. Red or blue? A potential kilonova imprint of the delay until black hole formation following a neutron star merger

    E-Print Network [OSTI]

    Brian D. Metzger; Rodrigo Fernández

    2014-05-02T23:59:59.000Z

    Mergers of binary neutron stars (NSs) usually result in the formation of a hypermassive neutron star (HMNS). Whether- and when this remnant collapses to a black hole (BH) depends primarily on the equation of state and on angular momentum transport processes, both of which are uncertain. Here we show that the lifetime of the merger remnant may be directly imprinted in the radioactively powered kilonova emission following the merger. We employ axisymmetric, time-dependent hydrodynamic simulations of remnant accretion disks orbiting a HMNS of variable lifetime, and characterize the effect of this delay to BH formation on the disk wind ejecta. When BH formation is relatively prompt (~ 100 ms), outflows from the disk are sufficiently neutron rich to form heavy r-process elements, resulting in ~ week-long emission with a spectral peak in the near-infrared (NIR), similar to that produced by the dynamical ejecta. In contrast, delayed BH formation allows neutrinos from the HMNS to raise the electron fraction in the polar direction to values such that potentially Lanthanide-free outflows are generated. The lower opacity would produce a brighter, bluer, and shorter-lived ~ day-long emission (a `blue bump') prior to the late NIR peak from the dynamical ejecta and equatorial wind. This new diagnostic of BH formation should be useful for events with a signal to noise lower than that required for direct detection of gravitational waveform signatures.

  8. Independent Scientific Review Panel for the Northwest Power & Conservation Council

    E-Print Network [OSTI]

    1 Independent Scientific Review Panel for the Northwest Power & Conservation Council 851 SW 6th in the original solicitation. Statements about outstanding habitat units (HUs) and calculations from tables, reporting, and acquisitions are sufficiently improved. Those relating to actual management activities

  9. University of BonnUniversity of Bonn Computer Graphics GroupComputer Graphics Group BTF Acquisition & RenderingBTF Acquisition & RenderingBTF Acquisition & Rendering

    E-Print Network [OSTI]

    Eckmiller, Rolf

    University of BonnUniversity of Bonn Computer Graphics GroupComputer Graphics Group BTF AcquisitionRalf Sarlette Mirko SattlerMirko Sattler University of BonnUniversity of Bonn Computer Graphics GroupComputer Graphics Group How to Illuminate cloth?HowHow toto Illuminate clothIlluminate cloth?? People recognize

  10. Dust in the Radio Galaxy and Merger Remnant NGC 1316 (Fornax A)

    E-Print Network [OSTI]

    Asabere, Bernard Duah; Winkler, Hartmut; Jarrett, Thomas; Leeuw, Lerothodi

    2014-01-01T23:59:59.000Z

    We present dust maps of NGC 1316 (Fornax A), a well-studied early-type galaxy located in the outskirts of the Fornax cluster. We used the Large APEX BOlometer CAmera (LABOCA), operating at 870 micron with an angular resolution of 19.5 arcseconds on the Atacama Pathfinder EXperiment (APEX) 12m submillimeter telescope in Chile and the Wide-field Infrared Survey Explorer (WISE). WISE observes in four mid-infrared bands centered at 3.4, 4.6, 12 and 22 micron with angular resolutions ranging from 6 to 12 arcseconds. The WISE and LABOCA maps reveal emission from dust in the central 2 arcminutes of NGC 1316. The disturbed optical morphology with many shells and loops, the complex distribution of molecular gas and our dust maps are evidences of past merger activity or gas accretion in the galaxy. Combining the LABOCA flux measurement with existing mid- and far-infrared measurements, we estimate the temperature of the cold (~20 K) and warm (~55 K) dust components in the galaxy. This study will be extended to other sou...

  11. Enrichment history of r-process elements shaped by a merger of neutron star pairs

    E-Print Network [OSTI]

    Tsujimoto, Takuji

    2014-01-01T23:59:59.000Z

    The origin of r-process elements remains unidentified and still puzzles us. The recent discovery of evidence for the ejection of r-process elements from a short-duration gamma-ray burst singled out neutron star mergers (NSMs) as their origin. In contrast, core-collapse supernovae are ruled out as the main origin of heavy r-process elements (A>110) by recent numerical simulations. However, the properties characterizing NSM events - their rarity and high yield of r-process elements per event - have been claimed to be incompatible with the observed stellar records on r-process elements in the Galaxy. We add to this picture with our results, which show that the observed constant [r-process/H] ratio in faint dwarf galaxies and one star unusually rich in r-process in the Sculptor galaxy agree well with this rarity of NSM events. Furthermore, we found that a large scatter in the abundance ratios of r-process elements to iron in the Galactic halo can be reproduced by a scheme that incorporates an assembly of various ...

  12. The role of neutron star mergers in the chemical evolution of the Galactic halo

    E-Print Network [OSTI]

    Cescutti, G; Matteucci, F; Chiappini, C; Hirschi, R

    2015-01-01T23:59:59.000Z

    Aims. We explore the problem of the site of production of Eu. We use also the information present in the observed spread in the Eu abundances in the early Galaxy, not only its average trend. Moreover, we extend to other heavy elements (Ba, Sr, Rb, Zr) our investigations to provide additional constraints to our results. Methods. We adopt a stochastic chemical evolution model taking into account inhomogeneous mixing. The adopted yields of Eu from neutron star mergers (NSM) and from core-collapse supernovae (SNII) are those that are able to explain the average [Eu/Fe]-[Fe/H] trend observed for solar neighborhood stars, in the framework of a well-tested homogeneous model for the chemical evolution of the MilkyWay. Rb, Sr, Zr, and Ba are produced by both the s- and r-process. The s-process contribution by spinstars is the same as in our previous papers. Results. NSM that merge in less than 10 Myr or NSM combined with a source of r-process generated by massive stars can explain the spread of [Eu/Fe] in the Galactic...

  13. Merger of white dwarf-neutron star binaries: Prelude to hydrodynamic simulations in general relativity

    SciTech Connect (OSTI)

    Paschalidis, Vasileios [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); MacLeod, Morgan [Department of Physics and Astronomy, Bowdoin College, Brunswick, Maine 04011 (United States); Baumgarte, Thomas W. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Department of Physics and Astronomy, Bowdoin College, Brunswick, Maine 04011 (United States); Shapiro, Stuart L. [Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States); Department of Astronomy and NCSA, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)

    2009-07-15T23:59:59.000Z

    White dwarf-neutron star binaries generate detectable gravitational radiation. We construct Newtonian equilibrium models of corotational white dwarf-neutron star (WDNS) binaries in circular orbit and find that these models terminate at the Roche limit. At this point the binary will undergo either stable mass transfer (SMT) and evolve on a secular time scale, or unstable mass transfer (UMT), which results in the tidal disruption of the WD. The path a given binary will follow depends primarily on its mass ratio. We analyze the fate of known WDNS binaries and use population synthesis results to estimate the number of LISA-resolved galactic binaries that will undergo either SMT or UMT. We model the quasistationary SMT epoch by solving a set of simple ordinary differential equations and compute the corresponding gravitational waveforms. Finally, we discuss in general terms the possible fate of binaries that undergo UMT and construct approximate Newtonian equilibrium configurations of merged WDNS remnants. We use these configurations to assess plausible outcomes of our future, fully relativistic simulations of these systems. If sufficient WD debris lands on the NS, the remnant may collapse, whereby the gravitational waves from the inspiral, merger, and collapse phases will sweep from LISA through LIGO frequency bands. If the debris forms a disk about the NS, it may fragment and form planets.

  14. Early Cosmic Evolution of Europium from Core Collapse Supernovae and/or Neutron Star Mergers

    E-Print Network [OSTI]

    Vangioni, E; Daigne, F; Francois, P; Belczynski, K

    2015-01-01T23:59:59.000Z

    The rapid neutron-capture process is known to be of fundamental importance for explaining the origin of approximately half of the A > 60 stable nuclei observed in nature. Despite important efforts, the astrophysical site of the r process remains unidentified. The two most promising astrophysical sites of the r process, namely Core Collapse SuperNovae (CCSN) and Neutron Star Mergers (NSM) are considered in the context of the early cosmic chemical evolution through the origin and evolution of a typical r process element, Eu. The Eu abundance in very low metallicity stars is used to shed light on the possible CCSN and NSM contributions in the early Universe. Predictions are made here using a hierarchical model for structure formation for which a special attention is paid to a proper description of the stellar formation rate. Eu yields from NSM are taken from recent nucleosynthesis calculations. Observations of Eu in ultra metal poor stars are considered to constrain the model. We find that the bulk of Eu observa...

  15. Control And Data Acquisition System Of Tokamak KTM

    SciTech Connect (OSTI)

    Baystrukov, K. I.; Pavlov, V. M.; Sharnin, A. V.; Obhodskij, A. V.; Merkulov, S. V.; Golobokov, Y. N.; Mezentsev, A. A.; Ovchinnikov, A. V. [Tomsk Polytechnic University, 634050, Lenin ave. 30 (Russian Federation); Tazhibaeva, I. L. [National Nuclear Center (Kazakhstan)

    2008-04-07T23:59:59.000Z

    The preliminary results of control and data acquisition system (CODAS) development for Kazakhstan tokamak for material testing (KTM) [1] are presented. The KTM CODAS is completely new system optimized for KTM facility and its regimes of operation. Its development is carrying out in Tomsk Polytechnic University by Russian specialists. The first KTM launching under the control of CODAS is planed on 2008 year. The base functionality of CODAS is presented, including short description of its subsystems, such as control system of conditioning process, plasma control system, digital control system of power supplies, protection and timing system, data acquisition system.

  16. Land acquisition practices by Texas municipal park and recreation agencies

    E-Print Network [OSTI]

    Reuwsaat, Michael Arthur

    1984-01-01T23:59:59.000Z

    control over the use of that land. Hecause of the total control of the land, park and recreation agencies have tradit1 onal ly run into little res1 stance in the acquisition of such rights. In the past few years the acquisition of fee simple interests... Ownership Interest Ownership of the total interest 1n land, legally referred to as fee simple, was the type most frequently acquired by Texas park and recreation agencies. Fee s1mple ownership was acquired by Bl%%d of the agencies followed by leasehold 1...

  17. Acquisition Letter No. AL 1993-04 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY This Acquisition

  18. Fast and accurate prediction of numerical relativity waveforms from binary black hole mergers using surrogate models

    E-Print Network [OSTI]

    Jonathan Blackman; Scott E. Field; Chad R. Galley; Bela Szilagyi; Mark A. Scheel; Manuel Tiglio; Daniel A. Hemberger

    2015-02-26T23:59:59.000Z

    Simulating a binary black hole coalescence by solving Einstein's equations is computationally expensive, requiring days to months of supercomputing time. In this paper, we construct an accurate and fast-to-evaluate surrogate model for numerical relativity (NR) waveforms from non-spinning binary black hole coalescences with mass ratios from $1$ to $10$ and durations corresponding to about $15$ orbits before merger. Our surrogate, which is built using reduced order modeling techniques, is distinct from traditional modeling efforts. We find that the full multi-mode surrogate model agrees with waveforms generated by NR to within the numerical error of the NR code. In particular, we show that our modeling strategy produces surrogates which can correctly predict NR waveforms that were {\\em not} used for the surrogate's training. For all practical purposes, then, the surrogate waveform model is equivalent to the high-accuracy, large-scale simulation waveform but can be evaluated in a millisecond to a second depending on the number of output modes and the sampling rate. Our model includes all spherical-harmonic ${}_{-2}Y_{\\ell m}$ waveform modes that can be resolved by the NR code up to $\\ell=8$, including modes that are typically difficult to model with other approaches. We assess the model's uncertainty, which could be useful in parameter estimation studies seeking to incorporate model error. We anticipate NR surrogate models to be useful for rapid NR waveform generation in multiple-query applications like parameter estimation, template bank construction, and testing the fidelity of other waveform models.

  19. The interplay of disk wind and dynamical ejecta in the aftermath of neutron star - black hole mergers

    E-Print Network [OSTI]

    Rodrigo Fernández; Eliot Quataert; Josiah Schwab; Daniel Kasen; Stephan Rosswog

    2015-02-04T23:59:59.000Z

    We explore the evolution of the different ejecta components generated during the merger of a neutron star (NS) and a black hole (BH). Our focus is the interplay between material ejected dynamically during the merger, and the wind launched on a viscous timescale by the remnant accretion disk. These components are expected to contribute to an electromagnetic transient and to produce r-process elements, each with a different signature when considered separately. Here we introduce a two-step approach to investigate their combined evolution, using two- and three-dimensional hydrodynamic simulations. Starting from the output of a merger simulation, we identify each component in the initial condition based on its phase space distribution, and evolve the accretion disk in axisymmetry. The wind blown from this disk is injected into a three-dimensional computational domain where the dynamical ejecta is evolved. We find that the wind can suppress fallback accretion on timescales longer than ~100 ms. Due to self-similar viscous evolution, the disk accretion at late times nevertheless approaches a power-law time dependence $\\propto t^{-2.2}$. This can power some late-time GRB engine activity, although the available energy is significantly less than in traditional fallback models. Inclusion of radioactive heating due to the r-process does not significantly affect the fallback accretion rate or the disk wind. We do not find any significant modification to the wind properties at large radius due to interaction with the dynamical ejecta. This is a consequence of the different expansion velocities of the two components.

  20. Mining information from binary black hole mergers: a comparison of estimation methods for complex exponentials in noise

    E-Print Network [OSTI]

    Emanuele Berti; Vitor Cardoso; Jose A. Gonzalez; Ulrich Sperhake

    2007-06-17T23:59:59.000Z

    The ringdown phase following a binary black hole merger is usually assumed to be well described by a linear superposition of complex exponentials (quasinormal modes). In the strong-field conditions typical of a binary black hole merger, non-linear effects may produce mode coupling. Artificial mode coupling can also be induced by the black hole's rotation, if the radiation field is expanded in terms of spin-weighted spherical (rather than spheroidal) harmonics. Observing deviations from linear black hole perturbation theory requires optimal fitting techniques to extract ringdown parameters from numerical waveforms, which are inevitably affected by errors. So far, non-linear least-squares fitting methods have been used as the standard workhorse to extract frequencies from ringdown waveforms. These methods are known not to be optimal for estimating parameters of complex exponentials. Furthermore, different fitting methods have different performance in the presence of noise. The main purpose of this paper is to introduce the gravitational wave community to modern variations of a linear parameter estimation technique first devised in 1795 by Prony: the Kumaresan-Tufts and matrix pencil methods. Using "test" damped sinusoidal signals in Gaussian white noise we illustrate the advantages of these methods, showing that they have variance and bias at least comparable to standard non-linear least-squares techniques. Then we compare the performance of different methods on unequal-mass binary black hole merger waveforms. The methods we discuss should be useful both theoretically (to monitor errors and search for non-linearities in numerical relativity simulations) and experimentally (for parameter estimation from ringdown signals after a gravitational wave detection).

  1. HELIUM-IGNITED VIOLENT MERGERS AS A UNIFIED MODEL FOR NORMAL AND RAPIDLY DECLINING TYPE Ia SUPERNOVAE

    SciTech Connect (OSTI)

    Pakmor, R.; Springel, V. [Heidelberger Institut fuer Theoretische Studien, Schloss-Wolfsbrunnenweg 35, D-69118 Heidelberg (Germany); Kromer, M. [Kavli Institute for the Physics and Mathematics of the Universe, University of Tokyo, Kashiwa, Chiba 277-8583 (Japan); Taubenberger, S. [Max-Planck-Institut fuer Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching (Germany)

    2013-06-10T23:59:59.000Z

    The progenitors of Type Ia supernovae (SNe Ia) are still unknown, despite significant progress during the past several years in theory and observations. Violent mergers of two carbon-oxygen (CO) white dwarfs (WDs) are a candidate scenario suggested to be responsible for at least a significant fraction of normal SNe Ia. Here, we simulate the merger of two CO WDs using a moving-mesh code that allows for the inclusion of thin helium (He) shells (0.01 M{sub Sun }) on top of the WDs at an unprecedented numerical resolution. The accretion of He onto the primary WD leads to the formation of a detonation in its He shell. This detonation propagates around the CO WD and sends a converging shock wave into its core, known to robustly trigger a second detonation, as in the well-known double-detonation scenario for He-accreting CO WDs. However, in contrast to that scenario where a massive He shell is required to form a detonation through thermal instability, here the He detonation is ignited dynamically. Accordingly the required He-shell mass is significantly smaller, and hence its burning products are unlikely to affect the optical display of the explosion. We show that this scenario, which works for CO primary WDs with CO- as well as He-WD companions, has the potential to explain the different brightness distributions, delay times, and relative rates of normal and fast declining SNe Ia. Finally, we discuss extensions to our unified merger model needed to obtain a comprehensive picture of the full observed diversity of SNe Ia.

  2. ANATOMY OF A POST-STARBURST MINOR MERGER: A MULTI-WAVELENGTH WFC3 STUDY OF NGC 4150

    SciTech Connect (OSTI)

    Crockett, R. Mark; Kaviraj, Sugata; Silk, Joseph I. [Department of Physics, University of Oxford, Oxford OX1 3RH (United Kingdom); Whitmore, Bradley C.; Mutchler, Max; Bond, Howard E. [Space Telescope Science Institute, Baltimore, MD 21218 (United States); O'Connell, Robert W. [Department of Astronomy, University of Virginia, Charlottesville, VA 22904-4325 (United States); Balick, Bruce [Department of Astronomy, University of Washington, Seattle, WA 98195-1580 (United States); Calzetti, Daniela [Department of Astronomy, University of Massachusetts, Amherst, MA 01003 (United States); Carollo, C. Marcella [Department of Physics, ETH-Zurich, Zurich 8093 (Switzerland); Disney, Michael J. [School of Physics and Astronomy, Cardiff University, Cardiff CF24 3AA (United Kingdom); Dopita, Michael A. [Research School of Astronomy and Astrophysics, Australian National University, ACT 2611 (Australia); Frogel, Jay A. [Association of Universities for Research in Astronomy, Washington, DC 20005 (United States); Hall, Donald N. B. [Institute for Astronomy, University of Hawaii, Honolulu, HI 96822 (United States); Holtzman, Jon A. [Department of Astronomy, New Mexico State University, Las Cruces, NM 88003 (United States); Kimble, Randy A. [NASA-Goddard Space Flight Center, Greenbelt, MD 20771 (United States); McCarthy, Patrick J. [Observatories of the Carnegie Institution of Washington, Pasadena, CA 91101-1292 (United States); Paresce, Francesco [Istituto di Astrofisica Spaziale e Fisica Cosmica, INAF, Via Gobetti 101, 40129 Bologna (Italy); Saha, Abhijit [National Optical Astronomy Observatories, Tucson, AZ 85726-6732 (United States); Trauger, John T., E-mail: mark.crockett@astro.ox.ac.uk [NASA-Jet Propulsion Laboratory, Pasadena, CA 91109 (United States)

    2011-02-01T23:59:59.000Z

    We present a spatially resolved near-UV/optical study, using the Wide Field Camera 3 (WFC3) on board the Hubble Space Telescope, of NGC 4150, a sub-L{sub *}, early-type galaxy (ETG) of around 6 x 10{sup 9} M{sub sun}, which has been observed as part of the WFC3 Early-Release Science Programme. Previous work indicates that this galaxy has a large reservoir of molecular hydrogen gas, exhibits a kinematically decoupled core (a likely indication of recent merging) and strong, central H{beta} absorption (indicative of young stars). While relatively uninspiring in its optical image, the core of NGC 4150 shows ubiquitous near-UV emission and remarkable dusty substructure. Our analysis shows this galaxy to lie in the near-UV green valley, and its pixel-by-pixel photometry exhibits a narrow range of near-UV/optical colors that are similar to those of nearby E+A (post-starburst) galaxies and lie between those of M83 (an actively star-forming spiral) and the local quiescent ETG population. We parameterize the properties of the recent star formation (RSF; age, mass fraction, metallicity, and internal dust content) in the NGC 4150 pixels by comparing the observed near-UV/optical photometry to stellar models. The typical age of the RSF is around 0.9 Gyr, consistent with the similarity of the near-UV colors to post-starburst systems, while the morphological structure of the young component supports the proposed merger scenario. The typical RSF metallicity, representative of the metallicity of the gas fuelling star formation, is {approx}0.3-0.5 Z{sub sun}. Assuming that this galaxy is a merger and that the gas is sourced mainly from the infalling companion, these metallicities plausibly indicate the gas-phase metallicity (GPM) of the accreted satellite. Comparison to the local mass-GPM relation suggests (crudely) that the mass of the accreted system is {approx}3 x 10{sup 8} M{sub sun}, making NGC 4150 a 1:20 minor merger. A summation of the pixel RSF mass fractions indicates that the RSF contributes {approx}2%-3% of the stellar mass. This work reaffirms our hypothesis that minor mergers play a significant role in the evolution of ETGs at late epochs.

  3. Energy Efficient Signal Acquisition in Wireless Sensor Networks : A Compressive

    E-Print Network [OSTI]

    Cambridge, University of

    and transmission. To save the energy in WSNs and thus prolong the network lifetime, we present a novel approach1 Energy Efficient Signal Acquisition in Wireless Sensor Networks : A Compressive Sensing Framework networks (WSNs) determines the rate of its energy consumption since most of the energy is used in sampling

  4. Land Acquisition Prepared by: Ben Floyd, Economic & Engineering Services

    E-Print Network [OSTI]

    Land Acquisition Prepared by: Ben Floyd, Economic & Engineering Services May 2004 Introduction Land taxpayer pockets"), and require no specific economic return to justify the expenditure. · There is also a general perception that long-term negative economic impacts may result if additional lands are taken out

  5. The Allegro gravitational wave detector Data acquisition and analysis

    E-Print Network [OSTI]

    Mauceli, E; Hamilton, W O; Johnson, W W; Merkowitz, S; Morse, A; Price, B T; Solomonson, N

    1996-01-01T23:59:59.000Z

    We discuss the data acquisition and analysis procedures used on the Allegro gravity wave detector, including a full description of the filtering used for bursts of gravity waves. The uncertainties introduced into timing and signal strength estimates due to stationary noise are measured, giving the windows for both quantities in coincidence searches.

  6. The Allegro gravitational wave detector: Data acquisition and analysis

    E-Print Network [OSTI]

    E. Mauceli; Z. K. Geng; W. O. Hamilton; W. W. Johnson; S. Merkowitz; A. Morse; B. Price; N. Solomonson

    1996-10-26T23:59:59.000Z

    We discuss the data acquisition and analysis procedures used on the Allegro gravity wave detector, including a full description of the filtering used for bursts of gravity waves. The uncertainties introduced into timing and signal strength estimates due to stationary noise are measured, giving the windows for both quantities in coincidence searches.

  7. Sanitation dynamics: toilet acquisition and its economic and social implications.

    E-Print Network [OSTI]

    Bandyopadhyay, Antar

    ! Abstract Poor sanitation is an important policy issue facing India, which accounts for over half of the 1 sanitation services to India's citizens. The Indian Government has shown strong commitment to improving villages in Gwalior, India, to understand determinants of toilet ownership and acquisition. (2) Toilet

  8. Bone motion analysis from dynamic MRI: acquisition and tracking

    E-Print Network [OSTI]

    Gilles, Benjamin

    overload, impingement or femoral head instability. For both the diagnosis and the surgical planningBone motion analysis from dynamic MRI: acquisition and tracking Benjamin Gilles1 , Rosalind Perrin2 methods in order to auto- matically extract active bone kinematics from multi-slice real-time dy- namic

  9. Acquisition Services Management (ASM) Division Subcontracts, ASM-SUB

    E-Print Network [OSTI]

    Acquisition Services Management (ASM) Division Subcontracts, ASM-SUB P.O. Box 1663, Mail Stop D447-trace of itself while running. Question/Issue 3 This question is on the three codes described in the Trinity Capability Improvement codes on the Cielo system is shown at different node counts. What is the memory

  10. Acquisition Services Management (ASM) Division Subcontracts, ASM-SUB

    E-Print Network [OSTI]

    Acquisition Services Management (ASM) Division Subcontracts, ASM-SUB P.O. Box 1663, Mail Stop D447 that the 'Base case' shall be run with "no OpenMP" threads or "any existing APIs in the codes which exploit SNAP, or MILC codes without using the OpenMP enabling compiler flag. I can provide details of the code

  11. The Green Computing Observatory: status of acquisition and analysis

    E-Print Network [OSTI]

    Lefèvre, Laurent

    The Green Computing Observatory: status of acquisition and analysis Cécile Germain-Renaud1, Julien, CNRS, INRIA 2: Laboratoire de l'Accélérateur Linéaire, CNRS-IN2P3 #12; Previous GreenDays talks o GreenDays@Paris The Green Computing Observatory: plans and scientific challenges o GreenDays@Lyon The Green Computing

  12. Configural Response Learning: The Acquisition of a Nonpredictive Motor Skill

    E-Print Network [OSTI]

    Ivry, Rich

    different types of strokes. Similarly, when learning to type or to play musical instrumentsConfigural Response Learning: The Acquisition of a Nonpredictive Motor Skill Eliot Hazeltine learning using a task that required simultaneous keypresses with 2 or 3 fingers, similar to the production

  13. Acquisition and Control of a Precision Formation Flying Mission

    E-Print Network [OSTI]

    2010 SSL # 10-10 #12;#12;Acquisition and Control of a Precision Formation Flying Mission John M. Field, David W. Miller June 2010 SSL # 10-10 This work is based on the unaltered text of the thesis by John M

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

    E-Print Network [OSTI]

    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

  15. Data acquisition system at the RIKEN accelerator facility

    SciTech Connect (OSTI)

    Ichihara, T.; Inamura, T.; Wada, T.; Ishihara, M. (RIKEN Accelerator facility 2-1, Hirosawa, Wako, 351-01 (JP))

    1989-10-01T23:59:59.000Z

    This paper describes data acquisition system using J11 CPU (Starburst 2180 ACC) and Micro VAX II. Each event is processed by J11 CPU. Buffered data is transferred to Micro VAX II through Kinetic parallel bus. The executable image on J11 is builded on Micro VAX II using VAX/RSX and down-line loaded via CAMAC dataway.

  16. Remote Sensing Ayman F. Habib Data Acquisition Systems

    E-Print Network [OSTI]

    Habib, Ayman

    Remote Sensing Ayman F. Habib 1 Chapter 3 Data Acquisition Systems #12;Remote Sensing Ayman F. ­ Electro-mechanical scanners. #12;Remote Sensing Ayman F. Habib 3 Overview · LIDAR operational principles for recognition and classification purposes. #12;Remote Sensing Ayman F. Habib 4 Remote Sensing Systems Utilized

  17. LE CONTROLE DE GESTION DANS LES FUSIONS-ACQUISITIONS

    E-Print Network [OSTI]

    Boyer, Edmond

    1 LE CONTROLE DE GESTION DANS LES FUSIONS-ACQUISITIONS INTERNATIONALES : UN OUTIL D'INTEGRATION ? Ludivine Chalençon Doctorante en Sciences de Gestion (titulaire d'un contrat doctoral) Centre de recherche contrôle de gestion peut constituer un pivot pouvant freiner mais également aider la réunion des entités

  18. System Integration System Demonstration Low-Rate Initial Production Acquisition

    E-Print Network [OSTI]

    Rhoads, James

    updated MS A The Milestone Decision Authority may authorize entry into the acquisition process at any) - Certification (MAIS) Clinger-Cohen Act - Compliance (all IT) - Certification (MAIS) Exit Criteria DAB/ DSAB/ ITAB MDA Exit Criteria ADM Exit Criteria Met APB Exit Criteria ADM Exit Criteria Met Exit Criteria ADM

  19. ICT COMPETENCES ACQUISITION USING THE CONCORDE E-LEARNING PLATFORM

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    ICT COMPETENCES ACQUISITION USING THE CONCORDE E-LEARNING PLATFORM Mircea Giurgiu Technical of the web platform. The targeted competences respond to the training needs identified in the first stage of the project. A web platform developed at Technical University of Cluj supports on-line training material

  20. Policy Flash 2014-26 Acquisition Guide Chapter 70.31A - Costs...

    Energy Savers [EERE]

    Policy Flash 2014-26 Acquisition Guide Chapter 70.31A - Costs Associated with Whistleblower Actions Policy Flash 2014-26 Acquisition Guide Chapter 70.31A - Costs Associated with...

  1. Policy Flash 2013-68 Acquisition Guide 42.101 | Department of...

    Energy Savers [EERE]

    Policy Flash 2013-68 Acquisition Guide 42.101 Policy Flash 2013-68 Acquisition Guide 42.101 Questions concerning this policy flash should be directed to Michael Righi of the...

  2. Attached is Policy Flash 2013-34 Department of Energy Acquisition...

    Energy Savers [EERE]

    Attached is Policy Flash 2013-34 Department of Energy Acquisition Letter 2013-04 on Executive Compensation Attached is Policy Flash 2013-34 Department of Energy Acquisition Letter...

  3. Policy Flash 2013-31 Class Deviation from the Federal Acquisition...

    Energy Savers [EERE]

    31 Class Deviation from the Federal Acquisition Regulation (FAR) 13.5, Test Program for Certain Commercial Items Policy Flash 2013-31 Class Deviation from the Federal Acquisition...

  4. Policy Flash 2014-08 ACQUISITION LETTER 2014-02: PROVISIONAL...

    Energy Savers [EERE]

    08 ACQUISITION LETTER 2014-02: PROVISIONAL PAYMENT OF FEE Policy Flash 2014-08 ACQUISITION LETTER 2014-02: PROVISIONAL PAYMENT OF FEE Questions concerning this policy flash should...

  5. U.S. Department of Energy Acquisition Strategy Guide for Capital Assets Projects

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

    2008-07-22T23:59:59.000Z

    This Guide serves as a tool for federal project directors developing a project acquisition strategy document. No cancellation.

  6. CHAPTER 4 NOAA PROCuREMENT, ACQuISITION, & CONSTRuCTION NOAA's Procurement, Acquisition, and Construction (PAC) account

    E-Print Network [OSTI]

    . This account is grouped by line office into five activities: (1) "Systems Acquisition," which includes projects) investments in observing systems and data center modernization; (5) "Fleet and Aircraft Replacement," which) Construction line to the Operations, Research, and Facilities (ORF) account to consolidate funding for WFO

  7. Study of the digital camera acquisition process and statistical modeling of the sensor raw data

    E-Print Network [OSTI]

    Study of the digital camera acquisition process and statistical modeling of the sensor raw data C. In the present report we present a detailed analysis of the digital image acquisition process which allows us. Aguerrebere, J. Delon, Y. Gousseau, P. Mus´e 1 Introduction The accurate modeling of the acquisition process

  8. EARLY X-RAY AND OPTICAL AFTERGLOW OF GRAVITATIONAL WAVE BURSTS FROM MERGERS OF BINARY NEUTRON STARS

    SciTech Connect (OSTI)

    Zhang Bing [Kavli Institute of Astronomy and Astrophysics, Peking University, Beijing 100871 (China)

    2013-01-20T23:59:59.000Z

    Double neutron star mergers are strong sources of gravitational waves. The upcoming advanced gravitational wave detectors are expected to make the first detection of gravitational wave bursts (GWBs) associated with these sources. Proposed electromagnetic counterparts of a GWB include a short gamma-ray burst, an optical macronova, and a long-lasting radio afterglow. Here we suggest that at least some GWBs could be followed by an early afterglow lasting for thousands of seconds, if the post-merger product is a highly magnetized, rapidly rotating, massive neutron star rather than a black hole. This afterglow is powered by dissipation of a proto-magnetar wind. The X-ray flux is estimated to be as bright as (10{sup -8}-10{sup -7}) erg s{sup -1} cm{sup -2}. The optical flux is subject to large uncertainties but could be as bright as 17th magnitude in R band. We provide observational hints of such a scenario, and discuss the challenge and strategy to detect these signals.

  9. Major Mergers Host the Most Luminous Red Quasars at z ~ 2: A Hubble Space Telescope WFC3/IR Study

    E-Print Network [OSTI]

    Glikman, Eilat; Mailly, Madeline; Schawinski, Kevin; Urry, C M; Lacy, M

    2015-01-01T23:59:59.000Z

    We used the Hubble Space Telescope WFC3 near-infrared camera to image the host galaxies of a sample of eleven luminous, dust-reddened quasars at z ~ 2 -- the peak epoch of black hole growth and star formation in the Universe -- to test the merger-driven picture for the co-evolution of galaxies and their nuclear black holes. The red quasars come from the FIRST+2MASS red quasar survey and a newer, deeper, UKIDSS+FIRST sample. These dust-reddened quasars are the most intrinsically luminous quasars in the Universe at all redshifts, and may represent the dust-clearing transitional phase in the merger-driven black hole growth scenario. Probing the host galaxies in rest-frame visible light, the HST images reveal that 8/10 of these quasars have actively merging hosts, while one source is reddened by an intervening lower redshift galaxy along the line-of-sight. We study the morphological properties of the quasar hosts using parametric Sersic fits as well as the non-parametric estimators (Gini coefficient, M_{20} and a...

  10. The pre-merger impact velocity of the binary cluster A1750 from X-ray, lensing, and hydrodynamical simulations

    SciTech Connect (OSTI)

    Molnar, Sandor M. [Leung Center for Cosmology and Particle Astrophysics, National Taiwan University, Taipei 10617, Taiwan (China); Chiu, I-Non Tim [Department of Physics, Ludwig-Maximilians University, Scheinerstr 1, D-81679 Munich (Germany); Broadhurst, Tom [Department of Theoretical Physics, University of the Basque Country, E-48080 Bilbao (Spain); Stadel, Joachim G., E-mail: sandor@phys.ntu.edu.tw [Institute for Theoretical Physics, University of Zurich, 8057 Zurich (Switzerland)

    2013-12-10T23:59:59.000Z

    Since the discovery of the 'Bullet Cluster', several similar cases have been uncovered that suggest relative velocities well beyond the tail of high speed collisions predicted by the concordance ?CDM model. However, quantifying such post-merger events with hydrodynamical models requires a wide coverage of possible initial conditions. Here, we show that it is simpler to interpret pre-merger cases, such as A1750, where the gas between the colliding clusters is modestly affected, so that the initial conditions are clear. We analyze publicly available Chandra data confirming a significant increase in the projected X-ray temperature between the two cluster centers in A1750 consistent with our expectations for a merging cluster. We model this system with a self-consistent hydrodynamical simulation of dark matter and gas using the FLASH code. Our simulations reproduce well the X-ray data and the measured redshift difference between the two clusters in the phase before the first core passage viewed at an intermediate projection angle. The deprojected initial relative velocity derived using our model is 1460 km s{sup –1}, which is considerably higher than the predicted mean impact velocity for simulated massive haloes derived by recent ?CDM cosmological simulations, but is within the allowed range. Our simulations demonstrate that such systems can be identified using a multi-wavelength approach and numerical simulations, for which the statistical distribution of relative impact velocities may provide a definitive examination of a broad range of dark matter scenarios.

  11. Testing the Modern Merger Hypothesis via the Assembly of Massive Blue Elliptical Galaxies in the Local Universe

    E-Print Network [OSTI]

    Haines, Tim; Sánchez, S F; Tremonti, C; Rudnick, G

    2015-01-01T23:59:59.000Z

    The modern merger hypothesis offers a method of forming a new elliptical galaxy through merging two equal-mass, gas-rich disk galaxies fuelling a nuclear starburst followed by efficient quenching and dynamical stabilization. A key prediction of this scenario is a central concentration of young stars during the brief phase of morphological transformation from highly-disturbed remnant to new elliptical galaxy. To test this aspect of the merger hypothesis, we use integral field spectroscopy to track the stellar Balmer absorption and 4000\\AA\\ break strength indices as a function of galactic radius for 12 massive (${\\rm M_{*}}\\ge10^{10}{\\rm M_{\\odot}}$), nearby (${\\rm z}\\le0.03$), visually-selected plausible new ellipticals with blue-cloud optical colours and varying degrees of morphological peculiarities. We find that these index values and their radial dependence correlate with specific morphological features such that the most disturbed galaxies have the smallest 4000\\AA\\ break strengths and the largest Balmer ...

  12. Forrest Ranch Acquisition, Annual Report 2001-2002.

    SciTech Connect (OSTI)

    Smith, Brent

    2003-08-01T23:59:59.000Z

    Through their John Day Basin Office, the Confederated Tribes of Warm Springs Reservation of Oregon (Tribes) acquired the Forrest Ranch during July of 2002. The property consists of two parcels located in the John Day subbasin within the Columbia basin. The mainstem parcel consists of 3,503 acres and is located 1/2 mile to the east of Prairie City, Oregon on the mainstem of the John Day River. The middle fork parcel consists of 820 acres and is located one mile to the west of the town of Austin, OR on the middle fork John Day River. The Forrest Ranch Project is under a memorandum of agreement with the Bonneville Power Administration (BPA) to provide an annual written report generally describing the real property interests of the project and management activities undertaken or in progress. The Forrest Ranch acquisition was funded by BPA as part of their program to protect, mitigate, and enhance fish and wildlife habitat affected by the operation of their hydroelectric facilities on the Columbia River and its tributaries. Following lengthy negotiations with the BPA and property owner, the Tribes were able to conclude the acquisition of the Forrest Ranch in July of 2002. The intent of the acquisition project was to partially mitigate fish and wildlife impacts for the John Day Dam on the Columbia River as outlined in the Northwest Power Planning Council's Wildlife Program (NPPC 1994, section 11.1, section 7.6). While the Tribes hold fee-title to the property, the BPA has assured a level of program funding through a memorandum of agreement and annual statement of work. As early as 1997, the Tribes identified this property as a priority for restoration in the John Day basin. In 2000, the Tribes arranged an agreement with the landowner to seek funds for the acquisition of both the Middle Fork and upper Mainstem John Day River holdings of Mr. John Forrest. This property had been a priority of not only the Tribes, but of many other basin natural resource agencies. The contract period was the first year of the program with December 2001 through July 2nd 2002 being previous to acquisition of the property. The majority of the activities conducted under the contract period were spent on O&M and pre acquisition activities.

  13. Microsoft Word - Acquisition Guide 32 1 - Reviewing and Approving Contract Invoices.doc

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33Frequently Asked Questions forCheneyNovember S. DEPARTMENT OFMonday, December Chapter 71.10,

  14. Molecular and atomic gas in dust lane early-type galaxies - I: Low star-formation efficiencies in minor merger remnants

    E-Print Network [OSTI]

    Davis, Timothy A; Allison, James R; Shabala, Stanislav S; Ting, Yuan-Sen; Lagos, Claudia del P; Kaviraj, Sugata; Bourne, Nathan; Dunne, Loretta; Eales, Steve; Ivison, Rob J; Maddox, Steve; Smith, Daniel J B; Smith, Matthew W L; Temi, Pasquale

    2015-01-01T23:59:59.000Z

    In this work we present IRAM-30m telescope observations of a sample of bulge-dominated galaxies with large dust lanes, which have had a recent minor merger. We find these galaxies are very gas rich, with H2 masses between 4x10^8 and 2x10^10 Msun. We use these molecular gas masses, combined with atomic gas masses from an accompanying paper, to calculate gas-to-dust and gas-to-stellar mass ratios. The gas-to-dust ratios of our sample objects vary widely (between ~50 and 750), suggesting many objects have low gas-phase metallicities, and thus that the gas has been accreted through a recent merger with a lower mass companion. We calculate the implied minor companion masses and gas fractions, finding a median predicted stellar mass ratio of ~40:1. The minor companion likely had masses between ~10^7 - 10^10 Msun. The implied merger mass ratios are consistent with the expectation for low redshift gas-rich mergers from simulations. We then go on to present evidence that (no matter which star-formation rate indicator ...

  15. The Minor-Merger Driven Nuclear Activity in Seyfert Galaxies: A Step toward the Simple Unified Formation Mechanism of Active Galactic Nuclei in the Local Universe

    E-Print Network [OSTI]

    Yoshiaki Taniguchi

    1999-05-27T23:59:59.000Z

    Seyfert nuclei are typical active galactic nuclei (AGNs) in the local universe, which are thought to be powered by gas accretion onto a supermassive black hole (SMBH). The dynamical effect exerted either by non-axisymmetric gravitational potential (such as a stellar bar) or by interaction with other galaxies has been often considered to cause the efficient gas fueling. However, recent systematic studies for large samples of Seyfert nuclei have shown that; 1) Seyfert nuclei do not prefer barred galaxies as their hosts, and 2) only $\\simeq$ 10% of Seyfert galaxies have companion galaxies. These findings raise again a question; "What is important in the fueling of nuclear activity ?" Here we suggest that an alternative fueling mechanism, the minor-merger (i.e., mergers between a gas-rich disk galaxy and a bound, less-massive satellite galaxy) driven fueling appears consistent with almost all important observational properties of Seyfert galaxies. Nucleated (i.e., either a SMBH or a dense nuclear star cluster) galaxies and satellites seem necessary to ensure that the gas in the host disk is surely fueled into the very inner region (e.g., $\\ll$ 1 pc). Taking account that local quasars may be formed by major mergers between/among galaxies, we propose that all the AGNs in the local universe were made either by minor or by major mergers.

  16. Merger-driven Fueling of Active Galactic Nuclei: Six Dual and Offset Active Galactic Nuclei Discovered with Chandra and Hubble Space Telescope Observations

    E-Print Network [OSTI]

    Comerford, Julia M; Barrows, R Scott; Greene, Jenny E; Zakamska, Nadia L; Madejski, Greg M; Cooper, Michael C

    2015-01-01T23:59:59.000Z

    Dual active galactic nuclei (AGNs) and offset AGNs are kpc-scale separation supermassive black holes pairs created during galaxy mergers, where both or one of the black holes are AGNs, respectively. These dual and offset AGNs are valuable probes of the link between mergers and AGNs but are challenging to identify. Here we present Chandra/ACIS observations of 12 optically-selected dual AGN candidates at z < 0.34, where we use the X-rays to identify AGNs. We also present HST/WFC3 observations of 10 of these candidates, which reveal any stellar bulges accompanying the AGNs. We discover a dual AGN system with separation of 2.2 kpc, where the two stellar bulges have coincident [O III] and X-ray sources. This system is an extremely minor merger (460:1) that may include a dwarf galaxy hosting an intermediate mass black hole. We also find six single AGNs, and five systems that are either dual or offset AGNs with separations < 10 kpc. Four of the six dual AGNs and dual/offset AGNs are in ongoing major mergers, a...

  17. FATIMA; A data acquisition system for medium scale experiments

    SciTech Connect (OSTI)

    Watzlawik, K.H.; Nellen, R.; Noll, T.; Karnadi, M.; Machner, H. (Inst. fuer Kernphysik, Forschungszentrum Juelich, Juelich (DE))

    1992-04-01T23:59:59.000Z

    This paper discusses the data acquisition system FATIMA (Fera Amplitude and Time Multiparameter Analyzer) utilizing CAMAC, FERA and a VAX-Station, designed and built for nuclear physics experiments like subthreshold {pi}{sup 0}-production in Heavy Ion Collisions. The major features of the system are fast data readout of up to 352 ADCs and/or TDCs in conjunction with data reduction, event buffering, high speed data transfer and simple interfacing to any workstation. For on-line acquisition, recording and analysis of data as well as experiment control a modular program system was developed on VAX/VMS. Data analysis comprises on-line sort of real and pseudo channels and graphical representation of sorted data.

  18. Program and Project Management for the Acquisition of Capital Assets

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

    2011-05-18T23:59:59.000Z

    To provide the Department of Energy (DOE), including the National Nuclear Security Administration, with project management direction for the acquisition of capital assets with the goal of delivering projects on schedule, within budget, and fully capable of meeting mission performance, safeguards and security, and environmental, safety, and health standards. Cancels DOE O 413.3. Canceled by DOE O 413.3A Chg 1.

  19. Program and Project Management for the Acquisition of Capital Assets

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

    2006-07-28T23:59:59.000Z

    The Order provides project management direction for the acquisition of capital assets that are delivered on schedule, within budget, and capable of meeting mission performance and environmental safety and health standards. The page change incorporates requirements of DOE-STD-1189-2008, Integration of Safety into the Design Process, mandatory for Hazard Category 1, 2 and 3 nuclear facilities. Cancels DOE O 413.3. Canceled by DOE O 413.3B dated 11-29-10.

  20. DATA ACQUISITION FOR SNS BEAM LOSS MONITOR SYSTEM

    SciTech Connect (OSTI)

    YENG,Y.GASSNER,D.HOFF,L.WITKOVER,R.

    2003-10-13T23:59:59.000Z

    The Spallation Neutron Source (SNS) beam loss monitor system uses VME based electronics to measure the radiation produced by lost beam. Beam loss signals from cylindrical argon-filled ion chambers and neutron detectors will be conditioned in analog front-end (AFE) circuitry. These signals will be digitized and further processed in a dedicated VME crate. Fast beam inhibit and low-level, long-term loss warnings will be generated to provide machine protection. The fast loss data will have a bandwidth of 35kHz. While the low level, long-term loss data will have much higher sensitivity. This is further complicated by the 3 decade range of intensity as the Ring accumulates beam. Therefore a bandwidth of 100kHz and dynamic range larger than 21 bits data acquisition system will be required for this purpose. Based on the evaluation of several commercial ADC modules in preliminary design phase, a 24 bits Sigma-Delta data acquisition VME bus card was chosen as the SNS BLM digitizer. An associated vxworks driver and EPICS device support module also have been developed at BNL. Simulating test results showed this system is fully qualified for both fast loss and low-level, long-term loss application. The first prototype including data acquisition hardware setup and EPICS software (running database and OPI clients) will be used in SNS Drift Tube Linac (DTL) system commissioning.

  1. Networked VAX/LSI/CAMAC data acquisition system development

    SciTech Connect (OSTI)

    Melvin, J.D.; Clark, D.L.; Mendenhall, M.H.; Tombrello, T.A.

    1983-10-01T23:59:59.000Z

    Recent development of the Caltech data acquisition system installed in 1981, which runs on a VAX-11/750, a Peritek Q-bus network, LSI-11s, and CAMAC, is described. In this system, the DEC VMS and RT-11 operating systems are supported on the VAX ''host'' and LSI-11 ''front-end'' computers by a VMS device driver and network host program, and a bootable RT-11 device driver. Network ''utility'' and ''control'' programs provide general purpose support for communication between front-end and host software. Data acquisition software tools are provided for writing programs to run nuclear physics experiments. A system similar to Caltech's was installed at the University of Rochester in 1982. The network has been tested for speed and real-time response. After including all software overhead required by data acquisition, it was found that the system could transfer buffers and acknowledge their receipt at a net speed of 127 KB per second with a 35% load on the host computer. The network software is currently being rehosted on Ethernet hardware at Caltech in a multiple host - many front-end computer configuration. Compatibility with the current Peritek network software will be maintained.

  2. Radio controlled release apparatus for animal data acquisition devices

    DOE Patents [OSTI]

    Stamps, James Frederick (5252 Norma Way, Livermore, Alameda County, CA 94550)

    2000-01-01T23:59:59.000Z

    A novel apparatus for reliably and selectively releasing a data acquisition package from an animal for recovery. The data package comprises two parts: 1) an animal data acquisition device and 2) a co-located release apparatus. One embodiment, which is useful for land animals, the release apparatus includes two major components: 1) an electronics package, comprising a receiver; a decoder comparator, having at plurality of individually selectable codes; and an actuator circuit and 2) a release device, which can be a mechanical device, which acts to release the data package from the animal. To release a data package from a particular animal, a radio transmitter sends a coded signal which is decoded to determine if the code is valid for that animal data package. Having received a valid code, the release device is activated to release the data package from the animal for subsequent recovery. A second embodiment includes floatation means and is useful for releasing animal data acquisition devices attached to sea animals. This embodiment further provides for releasing a data package underwater by employing an acoustic signal.

  3. The Swift short gamma-ray burst rate density: prospects for detecting binary neutron star mergers by aLIGO

    E-Print Network [OSTI]

    David Coward; Eric Howell; Tsvi Piran; Giulia Stratta; Marica Branchesi; Omer Bromberg; Bruce Gendre; Ronald Burman; Dafne Guetta

    2012-06-22T23:59:59.000Z

    Presently only 30% of short gamma ray bursts (SGRBs) have accurate redshifts, and this sample is highly biased by the limited sensitivity of {\\it Swift} to detect SGRBs. We account for the dominant biases to calculate a realistic SGRB rate density out to $z = 0.5$ using the {\\it Swift} sample of peak fluxes, redshifts, and those SGRBs with a beaming angle constraint from X-ray/optical observations. Assuming a significant fraction of binary neutron star mergers produce SGRBs, we calculate lower and upper detection rate limits of (1-180) per Yr by an advanced LIGO and Virgo coincidence search. Our detection rate is compatible with extrapolations using Galactic pulsar observations and population synthesis.

  4. Serial stimuli in the acquisition of discriminated avoidance

    E-Print Network [OSTI]

    Hildbrand, Mary Kathleen

    1971-01-01T23:59:59.000Z

    SERIAL STINULI 1N THE ACQUISITION OF DISCRIMINATED AVOIDANCE A Thesis by NARY KATHLEEN HILDBRAND Submitted to the Graduate College of Texas A 6 N University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE... August 1971 Ma)or Sub)ect: Psychology SERIAL STIMUKX IN THE AOgUISITION OF DISCRIMINATED AVOIDANCE A Thesis by Approved as to style and content by: (Chairmen of ommitte d of Department) ber) ber) (Member) AnSust 1971 ABSTRACT Serial Stimuli...

  5. Louisiana Dry Natural Gas Reserves Acquisitions (Billion Cubic Feet)

    Gasoline and Diesel Fuel Update (EIA)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40 Buildingto China (Million Cubic Feet) 3 0 0 0 1569 0 0 0 0 0Acquisitions

  6. California Dry Natural Gas Reserves Acquisitions (Billion Cubic Feet)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,128 2,469 2,321 2,590 1,550 1,460CubicYear Jan,835Acquisitions

  7. Policy Flash 2013-36 Update to Congressional Notifications - Acquisition

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

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  8. Acquisition Guide Chapter 22.1 Labor Standards

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter Chapter

  9. Acquisition Guide Chapter 50.1- Extraordinary Contractual Actions (January

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter

  10. Acquisition Guide Chapter 71.1 - Headquarters Business Clearance Process

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency Acquisitions Acqguide18pt0Chapter Chapter

  11. Acquisition Letter No. AL 1994-19 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY This

  12. Acquisition Letter No. AL 2006-10 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY ThisCLASS DEVIATION

  13. Acquisition Letter No. AL 2008-02 | Department of Energy

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

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  14. Acquisition Letter No. AL 2009-01 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY ThisCLASSSubject:

  15. Acquisition Letter No. AL 2012-02 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY ThisCLASSSubject:6,

  16. Acquisition Letter No. AL 2012-03 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY

  17. Acquisition Letter No. AL 2012-04 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13, 2011 TO:

  18. Acquisition Letter No. AL 2012-08 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13, 2011 TO:DATE:

  19. Acquisition Letter No. AL 2013-03 | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartmentDepartment of2 ofEmergency AcquisitionsAUTHORITY13, 2011

  20. ACQUISITION LETTER DEAR Part 933 | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2UraniumEnergyDepartment54th LessonsA Renewable Boost|ACQUISITION

  1. Acquisition Letter No. AL 2014-07 | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'s Reply Comments AT&T, SENSI NOT27 Acquisition Letter No. AL 2014-07

  2. Acquisition Letter No. AL 2015-07 | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'s Reply Comments AT&T, SENSI NOT27 Acquisition Letter No. AL

  3. Acquisition letter No. AL 2015-05 | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011AT&T, Inc.'s Reply Comments AT&T, SENSI NOT27 Acquisition Letter No.letter No. AL

  4. Acquisition & Financial Assistance Rules Status | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyDepartment ofATVM Loan ProgramUs AboutAcquisition & Financial

  5. Acquisition Guide for Federal Agencies | Department of Energy

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels DataEnergyDepartment ofATVM Loan ProgramUs AboutAcquisition &

  6. New Mexico Dry Natural Gas Reserves Acquisitions (Billion Cubic Feet)

    Annual Energy Outlook 2013 [U.S. Energy Information Administration (EIA)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 111 1,613 122 40CoalLease(Billion2,12803andYearWithdrawalsYear Jan1LeaseAcquisitions (Billion

  7. THE POST-MERGER MAGNETIZED EVOLUTION OF WHITE DWARF BINARIES: THE DOUBLE-DEGENERATE CHANNEL OF SUB-CHANDRASEKHAR TYPE Ia SUPERNOVAE AND THE FORMATION OF MAGNETIZED WHITE DWARFS

    SciTech Connect (OSTI)

    Ji Suoqing; Fisher, Robert T. [University of Massachusetts Dartmouth, Department of Physics, 285 Old Westport Road, North Dartmouth, MA 02740 (United States); Garcia-Berro, Enrique [Departament de Fisica Aplicada, Universitat Politecnica de Catalunya, c/Esteve Terrades, 5, E-08860 Castelldefels (Spain); Tzeferacos, Petros; Jordan, George; Lee, Dongwook [Center for Astrophysical Thermonuclear Flashes, The University of Chicago, Chicago, IL 60637 (United States); Loren-Aguilar, Pablo [School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL (United Kingdom); Cremer, Pascal [Bethe Center for Theoretical Physics, Universitaet Bonn, Nussallee 12, D-53115 Bonn (Germany); Behrends, Jan [Fachbereich Physik, Freie Universitaet Berlin, Arnimallee 14, D-14195 Berlin (Germany)

    2013-08-20T23:59:59.000Z

    Type Ia supernovae (SNe Ia) play a crucial role as standardizable cosmological candles, though the nature of their progenitors is a subject of active investigation. Recent observational and theoretical work has pointed to merging white dwarf binaries, referred to as the double-degenerate channel, as the possible progenitor systems for some SNe Ia. Additionally, recent theoretical work suggests that mergers which fail to detonate may produce magnetized, rapidly rotating white dwarfs. In this paper, we present the first multidimensional simulations of the post-merger evolution of white dwarf binaries to include the effect of the magnetic field. In these systems, the two white dwarfs complete a final merger on a dynamical timescale, and are tidally disrupted, producing a rapidly rotating white dwarf merger surrounded by a hot corona and a thick, differentially rotating disk. The disk is strongly susceptible to the magnetorotational instability (MRI), and we demonstrate that this leads to the rapid growth of an initially dynamically weak magnetic field in the disk, the spin-down of the white dwarf merger, and to the subsequent central ignition of the white dwarf merger. Additionally, these magnetized models exhibit new features not present in prior hydrodynamic studies of white dwarf mergers, including the development of MRI turbulence in the hot disk, magnetized outflows carrying a significant fraction of the disk mass, and the magnetization of the white dwarf merger to field strengths {approx}2 Multiplication-Sign 10{sup 8} G. We discuss the impact of our findings on the origins, circumstellar media, and observed properties of SNe Ia and magnetized white dwarfs.

  8. BER Requirements Review 2015

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

    Attendees 2015 ASCR Requirements Review 2015 Previous Reviews Requirements Review Reports Case Studies News & Publications ESnet News Publications and Presentations Galleries ESnet...

  9. ASCR Requirements Review 2015

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

    Requirements Review 2015 ASCR Attendees 2015 Previous Reviews Requirements Review Reports Case Studies News & Publications ESnet News Publications and Presentations Galleries ESnet...

  10. POLICY FLASH 2014-17 Revised Acquisition Letter 2013-11- Non...

    Energy Savers [EERE]

    Contractor Business Systems Clauses for Section H - Earned Value Management Clause POLICY FLASH 2014-17 Revised Acquisition Letter 2013-11- Non-Management and Operating...

  11. U.S. Department of Energy Fleet Alternative Fuel Vehicle Acquisition...

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

    U.S. Department of Energy Fleet Alternative Fuel Vehicle Acquisition Report for Fiscal Year 2008. doefleetreport2008.pdf More Documents & Publications Audit Report: IG-0896 The...

  12. Reading Acquisition, Developmental Dyslexia, and Skilled Reading Across Languages: A Psycholinguistic Grain Size Theory

    E-Print Network [OSTI]

    Port, Robert

    Reading Acquisition, Developmental Dyslexia, and Skilled Reading Across Languages representations and accompanying differences in developmental reading strategies and the manifestation of dyslexia

  13. Data Acquisition-Manipulation At U.S. West Region (Williams ...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Data Acquisition-Manipulation At U.S. West Region (Williams & Deangelo, 2008) Exploration...

  14. A dual-MBD VAX 11/780 data acquisition facility

    SciTech Connect (OSTI)

    Roberson, N.R.; Gould, C.R.

    1985-08-01T23:59:59.000Z

    The TUNL VAX 11/780 data acquisition facility has been expanded with the installation of a second MBD. Features of the expanded system are described.

  15. additional steady-state acquisition: Topics by E-print Network

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

    approach greatly reduces eddy-current-induced steady-state distortions. Fig. 3 shows ECG-gated measurements; VENC 150 cms). Results using a standard (GRE) PC acquisition...

  16. Sensor Acquisition for Water Utilities: Survey, Down Selection Process, and Technology List

    SciTech Connect (OSTI)

    Alai, M; Glascoe, L; Love, A; Johnson, M; Einfeld, W

    2005-06-29T23:59:59.000Z

    The early detection of the biological and chemical contamination of water distribution systems is a necessary capability for securing the nation's water supply. Current and emerging early-detection technology capabilities and shortcomings need to be identified and assessed to provide government agencies and water utilities with an improved methodology for assessing the value of installing these technologies. The Department of Homeland Security (DHS) has tasked a multi-laboratory team to evaluate current and future needs to protect the nation's water distribution infrastructure by supporting an objective evaluation of current and new technologies. The LLNL deliverable from this Operational Technology Demonstration (OTD) was to assist the development of a technology acquisition process for a water distribution early warning system. The technology survey includes a review of previous sensor surveys and current test programs and a compiled database of relevant technologies. In the survey paper we discuss previous efforts by governmental agencies, research organizations, and private companies. We provide a survey of previous sensor studies with regard to the use of Early Warning Systems (EWS) that includes earlier surveys, testing programs, and response studies. The list of sensor technologies was ultimately developed to assist in the recommendation of candidate technologies for laboratory and field testing. A set of recommendations for future sensor selection efforts has been appended to this document, as has a down selection example for a hypothetical water utility.

  17. Prioritizing Acquisition Pathways in the State Level Concept

    SciTech Connect (OSTI)

    Murphy, Chantell L. [Los Alamos National Laboratory; Budlong-Sylvester, Kory [Los Alamos National Laboratory; Pilat, Joseph F. [Los Alamos National Laboratory

    2012-06-27T23:59:59.000Z

    The International Atomic Energy Agency's (IAEA) Department of Safeguards has launched a project to further develop the State-level concept for the planning, implementation, and evaluation of safeguards activities. In order to further evolve the safeguards system an emphasis is placed on integrating inspection-related activities and the State evaluation process to draw safeguards conclusions in the most efficient way. The credible implementation of acquisition pathway analysis is central to the success of the IAEA's State-level concept. NNSA's Office of Nuclear Safeguards and Security (NA-241) The Next Generation Safeguards Initiative (NGSI) is sponsoring Los Alamos National Laboratory (LANL) to produce a study that will examine the use of acquisition pathway analysis in: (1) Developing a State-specific, State-level approach (SLA) and Annual Implementation Plan (AIP); (2) Maximizing the utility of the physical model; and (3) Supporting resource allocation decisions through a pathway prioritization. To deal with the challenge of developing an effective and efficient SLA, this study looks at: (1) Prioritizing proliferation pathways based on an assessment of a State's capabilities and assumed proliferation strategies; and (2) Relevant State behavior (e.g., transparency, cooperation, etc.) while avoiding subjective judgments about States themselves. The study makes use of case studies and concrete examples in order to illustrate how new concepts and approaches will be implemented, and how they may differ from more traditional safeguards approaches.

  18. Floating data acquisition system for microwave calorimeter measurements on MTX

    SciTech Connect (OSTI)

    Sewall, N.R.; Meassick, S. (Lawrence Livermore National Lab., CA (USA))

    1989-09-13T23:59:59.000Z

    A microwave calorimeter has been designed for making 140-GHz absorption measurements on the MTX. Measurement of the intensity and spatial distribution of the FEL-generated microwave beam on the inner wall will indicate the absorption characteristics of the plasma when heated with a 140 GHz FEL pulse. The calorimeter works by monitoring changes of temperature in silicon carbide tiles located on the inner wall of the tokamak. Thermistors are used to measure the temperature of each tile. The tiles are located inside the tokamak about 1 cm outside of the limiter radius at machine potential. The success of this measurement depends on our ability to float the data acquisition system near machine potential and isolate it from the rest of the vault ground system. Our data acquisition system has 48 channels of thermistor signal conditioning, a multiplexer and digitizer section, a serial data formatter, and a fiber-optic transmitter to send the data out. Additionally, we bring timing signals to the interface through optical fibers to tell it when to begin measurement, while maintaining isolation. The receiver is an HP 200 series computer with a serial data interface; the computer provides storage and local display for the shot temperature profile. Additionally, the computer provides temporary storage of the data until it can be passed to a shared resource management system for archiving. 2 refs., 6 figs.

  19. Performance Reviews

    E-Print Network [OSTI]

    1978-10-01T23:59:59.000Z

    FALL 1978 85 Performance Reviews Abolición de la propiedad In the fall 1974 issue of LATR, Juan Bruce-Novoa observed that the inherent difficulties and expense in staging Abolición de la propiedad by José Agustín made it a risky undertaking... not only by the complex technology involved, but also by the fact that José Agustín di rected the production himself. Agustin's tremendous energy and professional experience, coupled with the enthusiasm of his able student casts, led to excellent...

  20. Using ISS Telescopes for Electromagnetic Follow-up of Gravitational Wave Detections of NS-NS and NS-BH Mergers

    E-Print Network [OSTI]

    Jordan Camp; Scott D. Barthelmy; Lindy Blackburn; Kenneth Carpenter; Neil Gehrels; Jonah Kanner; Frank E. Marshall; Judith L. Racusin; Takanori Sakamoto

    2013-04-12T23:59:59.000Z

    The International Space Station offers a unique platform for rapid and inexpensive deployment of space telescopes. A scientific opportunity of great potential later this decade is the use of telescopes for the electromagnetic follow-up of ground-based gravitational wave detections of neutron star and black hole mergers. We describe this possibility for OpTIIX, an ISS technology demonstration of a 1.5 m diffraction limited optical telescope assembled in space, and ISS-Lobster, a wide-field imaging X-ray telescope now under study as a potential NASA mission. Both telescopes will be mounted on pointing platforms, allowing rapid positioning to the source of a gravitational wave event. Electromagnetic follow-up rates of several per year appear likely, offering a wealth of complementary science on the mergers of black holes and neutron stars.

  1. Search for Gravitational Waves from Binary Black Hole Inspiral, Merger and Ringdown in LIGO-Virgo Data from 2009-2010

    E-Print Network [OSTI]

    The LIGO Scientific Collaboration; the Virgo Collaboration; J. Aasi; J. Abadie; B. P. Abbott; R. Abbott; T. D. Abbott; M. Abernathy; T. Accadia; F. Acernese; C. Adams; T. Adams; P. Addesso; R. Adhikari; C. Affeldt; M. Agathos; K. Agatsuma; P. Ajith; B. Allen; A. Allocca; E. Amador Ceron; D. Amariutei; S. B. Anderson; W. G. Anderson; K. Arai; M. C. Araya; S. Ast; S. M. Aston; P. Astone; D. Atkinson; P. Aufmuth; C. Aulbert; B. E. Aylott; S. Babak; P. Baker; G. Ballardin; S. Ballmer; Y. Bao; J. C. B. Barayoga; D. Barker; F. Barone; B. Barr; L. Barsotti; M. Barsuglia; M. A. Barton; I. Bartos; R. Bassiri; M. Bastarrika; A. Basti; J. Batch; J. Bauchrowitz; Th. S. Bauer; M. Bebronne; D. Beck; B. Behnke; M. Bejger; M. G. Beker; A. S. Bell; C. Bell; I. Belopolski; M. Benacquista; J. M. Berliner; A. Bertolini; J. Betzwieser; N. Beveridge; P. T. Beyersdorf; T. Bhadbade; I. A. Bilenko; G. Billingsley; J. Birch; R. Biswas; M. Bitossi; M. A. Bizouard; E. Black; J. K. Blackburn; L. Blackburn; D. Blair; B. Bland; M. Blom; O. Bock; T. P. Bodiya; C. Bogan; C. Bond; R. Bondarescu; F. Bondu; L. Bonelli; R. Bonnand; R. Bork; M. Born; V. Boschi; S. Bose; L. Bosi; B. Bouhou; S. Braccini; C. Bradaschia; P. R. Brady; V. B. Braginsky; M. Branchesi; J. E. Brau; J. Breyer; T. Briant; D. O. Bridges; A. Brillet; M. Brinkmann; V. Brisson; M. Britzger; A. F. Brooks; D. A. Brown; T. Bulik; H. J. Bulten; A. Buonanno; J. Burguet-Castell; D. Buskulic; C. Buy; R. L. Byer; L. Cadonati; G. Cagnoli; E. Calloni; J. B. Camp; P. Campsie; K. Cannon; B. Canuel; J. Cao; C. D. Capano; F. Carbognani; L. Carbone; S. Caride; S. Caudill; M. Cavaglia; F. Cavalier; R. Cavalieri; G. Cella; C. Cepeda; E. Cesarini; T. Chalermsongsak; P. Charlton; E. Chassande-Mottin; W. Chen; X. Chen; Y. Chen; A. Chincarini; A. Chiummo; H. S. Cho; J. Chow; N. Christensen; S. S. Y. Chua; C. T. Y. Chung; S. Chung; G. Ciani; F. Clara; D. E. Clark; J. A. Clark; J. H. Clayton; F. Cleva; E. Coccia; P. -F. Cohadon; C. N. Colacino; A. Colla; M. Colombini; A. Conte; R. Conte; D. Cook; T. R. Corbitt; M. Cordier; N. Cornish; A. Corsi; C. A. Costa; M. Coughlin; J. -P. Coulon; P. Couvares; D. M. Coward; M. Cowart; D. C. Coyne; J. D. E. Creighton; T. D. Creighton; A. M. Cruise; A. Cumming; L. Cunningham; E. Cuoco; R. M. Cutler; K. Dahl; M. Damjanic; S. L. Danilishin; S. D'Antonio; K. Danzmann; V. Dattilo; B. Daudert; H. Daveloza; M. Davier; E. J. Daw; R. Day; T. Dayanga; R. De Rosa; D. DeBra; G. Debreczeni; J. Degallaix; W. Del Pozzo; T. Dent; V. Dergachev; R. DeRosa; S. Dhurandhar; L. Di Fiore; A. Di Lieto; I. Di Palma; M. Di Paolo Emilio; A. Di Virgilio; M. Diaz; A. Dietz; F. Donovan; K. L. Dooley; S. Doravari; S. Dorsher; M. Drago; R. W. P. Drever; J. C. Driggers; Z. Du; J. -C. Dumas; S. Dwyer; T. Eberle; M. Edgar; M. Edwards; A. Effler; P. Ehrens; G. Endroczi; R. Engel; T. Etzel; K. Evans; M. Evans; T. Evans; M. Factourovich; V. Fafone; S. Fairhurst; B. F. Farr; M. Favata; D. Fazi; H. Fehrmann; D. Feldbaum; I. Ferrante; F. Ferrini; F. Fidecaro; L. S. Finn; I. Fiori; R. P. Fisher; R. Flaminio; S. Foley; E. Forsi; L. A. Forte; N. Fotopoulos; J. -D. Fournier; J. Franc; S. Franco; S. Frasca; F. Frasconi; M. Frede; M. A. Frei; Z. Frei; A. Freise; R. Frey; T. T. Fricke; D. Friedrich; P. Fritschel; V. V. Frolov; M. -K. Fujimoto; P. J. Fulda; M. Fyffe; J. Gair; M. Galimberti; L. Gammaitoni; J. Garcia; F. Garufi; M. E. Gaspar; G. Gelencser; G. Gemme; E. Genin; A. Gennai; L. A. Gergely; S. Ghosh; J. A. Giaime; S. Giampanis; K. D. Giardina; A. Giazotto; S. Gil-Casanova; C. Gill; J. Gleason; E. Goetz; G. Gonzalez; M. L. Gorodetsky; S. Gossler; R. Gouaty; C. Graef; P. B. Graff; M. Granata; A. Grant; C. Gray; R. J. S. Greenhalgh; A. M. Gretarsson; C. Griffo; H. Grote; K. Grover; S. Grunewald; G. M. Guidi; C. Guido; R. Gupta; E. K. Gustafson; R. Gustafson; J. M. Hallam; D. Hammer; G. Hammond; J. Hanks; C. Hanna; J. Hanson; J. Harms; G. M. Harry; I. W. Harry; E. D. Harstad; M. T. Hartman; K. Haughian; K. Hayama; J. -F. Hayau; J. Heefner; A. Heidmann; M. C. Heintze; H. Heitmann; P. Hello; G. Hemming; M. A. Hendry; I. S. Heng; A. W. Heptonstall; V. Herrera; M. Heurs; M. Hewitson; S. Hild; D. Hoak; K. A. Hodge; K. Holt; M. Holtrop; T. Hong; S. Hooper; J. Hough; E. J. Howell; B. Hughey; S. Husa; S. H. Huttner; T. Huynh-Dinh; D. R. Ingram; R. Inta; T. Isogai; A. Ivanov; K. Izumi; M. Jacobson; E. James; Y. J. Jang; P. Jaranowski; E. Jesse; W. W. Johnson; D. I. Jones; R. Jones; R. J. G. Jonker; L. Ju; P. Kalmus; V. Kalogera; S. Kandhasamy; G. Kang; J. B. Kanner; M. Kasprzack; R. Kasturi; E. Katsavounidis; W. Katzman; H. Kaufer; K. Kaufman; K. Kawabe; S. Kawamura; F. Kawazoe; D. Keitel; D. Kelley; W. Kells; D. G. Keppel; Z. Keresztes; A. Khalaidovski; F. Y. Khalili; E. A. Khazanov; B. K. Kim; C. Kim; H. Kim; K. Kim; N. Kim; Y. M. Kim; P. J. King; D. L. Kinzel; J. S. Kissel; S. Klimenko

    2013-02-25T23:59:59.000Z

    We report a search for gravitational waves from the inspiral, merger and ringdown of binary black holes (BBH) with total mass between 25 and 100 solar masses, in data taken at the LIGO and Virgo observatories between July 7, 2009 and October 20, 2010. The maximum sensitive distance of the detectors over this period for a (20,20) Msun coalescence was 300 Mpc. No gravitational wave signals were found. We thus report upper limits on the astrophysical coalescence rates of BBH as a function of the component masses for non-spinning components, and also evaluate the dependence of the search sensitivity on component spins aligned with the orbital angular momentum. We find an upper limit at 90% confidence on the coalescence rate of BBH with non-spinning components of mass between 19 and 28 Msun of 3.3 \\times 10^-7 mergers /Mpc^3 /yr.

  2. STERN 978-0-12-370875-5 00005 Sulfur: From Acquisition

    E-Print Network [OSTI]

    159 STERN 978-0-12-370875-5 00005 Sulfur: From Acquisition to Assimilation David Gonzalez 5 INTRODUCTION Sulfur (S) is an essential element present in proteins, lipids, and important productivity s0010s0010 p0010p0010 CHAPTER CONTENTS Introduction 159 I. SO4 2 Acquisition and assimilation 160

  3. Global SunFarm Data Acquisition Network, Energy CRADLE, and Time Series Analysis

    E-Print Network [OSTI]

    Rollins, Andrew M.

    outdoor test beds across the world. Energy CRADLE is an ontology driven database acquisition tool which for Energy Technology workshop[1], the topic of photovoltaics(PV) lifetime and degradation science (LGlobal SunFarm Data Acquisition Network, Energy CRADLE, and Time Series Analysis Yang Hu, Mohammad

  4. Description and operating procedure for magma characterization data acquisition and control system

    SciTech Connect (OSTI)

    Woodward, M H

    1982-04-01T23:59:59.000Z

    A computerized data acquisition and control system used in a Sandia National Laboratories' facility for molten rock (magma) and metallurgical pressure bonding experiments is described. The system is based on a Hewlett-Packard 9826A Desktop Computer and a Hewlett-Packard 3497A Data Acquisition/Control Unit. Operating procedures are included, and detailed instructions for implementing the procedures are given.

  5. ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE-EDGE SCANNING MICROSCOPY

    E-Print Network [OSTI]

    Keyser, John

    ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis Science #12;ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis) ______________________________ ______________________________ Ergun Akleman Valerie Taylor (Member) (Head of Department) December 2003 Major Subject: Computer Science

  6. USING SPACE SYNTAX TO UNDERSTAND KNOWLEDGE ACQUISITION AND WAYFINDING IN INDOOR ENVIRONMENTS

    E-Print Network [OSTI]

    Klippel, Alexander

    -001- USING SPACE SYNTAX TO UNDERSTAND KNOWLEDGE ACQUISITION AND WAYFINDING IN INDOOR ENVIRONMENTS@psu.edu Abstract It is critical to understand how characteristics of environment influence human acquisition descriptions of environments and predicating wayfinding behaviors. From the perspective of cognitive geography

  7. USING SPACE SYNTAX TO UNDERSTAND KNOWLEDGE ACQUISITION AND WAYFINDING IN INDOOR ENVIRONMENTS

    E-Print Network [OSTI]

    Klippel, Alexander

    USING SPACE SYNTAX TO UNDERSTAND KNOWLEDGE ACQUISITION AND WAYFINDING IN INDOOR ENVIRONMENTS Rui Li@psu.edu Abstract It is critical to understand how characteristics of environment influence human acquisition descriptions of environments and predicating wayfinding behaviors. From the perspective of cognitive geography

  8. Learning, hubris and corporate serial acquisitions Nihat Aktas, Eric de Bodt,

    E-Print Network [OSTI]

    Nesterov, Yurii

    2007/68 Learning, hubris and corporate serial acquisitions Nihat Aktas, Eric de Bodt, and Richard Roll #12;CORE DISCUSSION PAPER 2007/68 Learning, hubris and corporate serial acquisitions Nihat AKTAS1 empirical hypotheses. 1 CORE & IAG, Université catholique de Louvain, Belgium. E-mail: nihat

  9. Etude du choix d'acquisition d'automobiles : Application du modle probit multinomial baysien

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Etude du choix d'acquisition d'automobiles : Application du modèle probit multinomial bayésien à l comportementale du choix individuel des agents lors d'une nouvelle acquisition automobile. En croisant les trois, Motorisation, Automobile. Classification JEL : C11 ; C25 Correspondance à : Roger Collet, INRETS/DEST, 2

  10. Program and Project Management for the Acquisition of Capital Assets

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

    2000-10-13T23:59:59.000Z

    To provide Department of Energy (DOE), including the National Nuclear Security Administration (NNSA), project management direction for the acquisition of capital assets that are delivered on schedule, within budget, and fully capable of meeting mission performance and environmental, safety and health standards. Cancels DOE O 430.1A, paragraphs 6e(7); 7a(3); 7b(11); 7b(14); 7c(4), (6), (7), (11) and (16); 7d(4) and (8); 7e(3), (10), and (17); Attachment 1, Definitions (items 30 - Line Item Project; item 42 - Project, item 48 - Strategic System; and Attachment 2, Contractor Requirements Document paragraph 1d regarding a project management system. Cancels DOE N 430.1 and DOE O 430.1A (in part). Canceled by DOE O 413.3A.

  11. Program and Project Management for the Acquisition of Capital Assets

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

    2000-10-13T23:59:59.000Z

    To provide Department of Energy (DOE), including the National Nuclear Security Administration (NNSA), project management direction for the acquisition of capital assets that are delivered on schedule, within budget, and fully capable of meeting mission performance and environmental, safety and health standards. (Cancels DOE O 430.1A, paragraphs 6e(7); 7a(3); 7b(11); 7b(14); 7c(4), (6), (7), (11) and (16); 7d(4) and (8); 7e(3), (10), and (17); Attachment 1, Definitions (items 30 - Line Item Project; item 42 - Project, item 48 - Strategic System); and Attachment 2, Contractor Requirements Document (paragraph 1d regarding a project management system). Cancels DOE N 430.1 and DOE O 430.1A (in part). Canceled by DOE O 413.3 Chg 1.

  12. System and method for acquisition management of subject position information

    DOE Patents [OSTI]

    Carrender, Curt

    2005-12-13T23:59:59.000Z

    A system and method for acquisition management of subject position information that utilizes radio frequency identification (RF ID) to store position information in position tags. Tag programmers receive position information from external positioning systems, such as the Global Positioning System (GPS), from manual inputs, such as keypads, or other tag programmers. The tag programmers program each position tag with the received position information. Both the tag programmers and the position tags can be portable or fixed. Implementations include portable tag programmers and fixed position tags for subject position guidance, and portable tag programmers for collection sample labeling. Other implementations include fixed tag programmers and portable position tags for subject route recordation. Position tags can contain other associated information such as destination address of an affixed subject for subject routing.

  13. MTX (Microwave Tokamak Experiment) data acquisition and analysis computer network

    SciTech Connect (OSTI)

    Butner, D.N.; Casper, T.A.; Brown, M.D.; Drlik, M.; Meyer, W.H.; Moller, J.M.

    1990-06-01T23:59:59.000Z

    For the MTX experiment, we use a network of computers for plasma diagnostic data acquisition and analysis. This multivendor network employs VMS, UNIX, and BASIC based computers connected in a local area Ethernet network. Some of the data is acquired directly into a VAX/VMS computer cluster over a fiber-optic serial CAMAC highway. Several HP-Unix workstations and HP-BASIC instrument control computers acquire and analyze data for the more data intensive or specialized diagnostics. The VAX/VMS system is used for global analysis of the data and serves as the central data archiving and retrieval manager. Shot synchronization and control of data flow are implemented by task-to-task message passing using our interprocess communication system. The system has been in operation during our initial MTX tokamak and FEL experiments; it has operated reliably with data rates typically in the range of 5 megabytes/shot without limiting the experimental shot rate.

  14. Summary of control and data acquisition systems for Nova experiments

    SciTech Connect (OSTI)

    McCauley, E.W.; Campbell, E.M.; Auerbach, J.M.; Montgomery, D.S.; Martin, V.A.; Randolph, J.E.; Shaw, J.G.; Stewart, B.L.; Stone, G.F.

    1986-04-01T23:59:59.000Z

    The Nova Laser has completed its first year of operation. During this period, emphasis has been placed on activation of the facility and of the numerous target and beam diagnostics. Two separate target chambers are in use. Nova operation is separated into two broad functions: Laser Operations and Experiments. The Operations Group provides the laser system control, operation and data acquisition and the Experiments Group provides experiment definition, diagnostic instrumentation and overall data processing. On the Operations side, VAX 11/780 computers are used to set up diagnostic operating parameters and collect data recorded by the CAMAC and CCD modules. These data are delivered in files by electronic link to the Laser Experiments and Analysis Facility (LEAF) VAX 11/785 of the Experiments Group for processing. Film data are digitized at LEAF and the film data files are also processed on the LEAF VAX.

  15. System and method for acquisition management of subject position information

    DOE Patents [OSTI]

    Carrender, Curt (Morgan Hill, CA)

    2007-01-23T23:59:59.000Z

    A system and method for acquisition management of subject position information that utilizes radio frequency identification (RF ID) to store position information in position tags. Tag programmers receive position information from external positioning systems, such as the Global Positioning System (GPS), from manual inputs, such as keypads, or other tag programmers. The tag programmers program each position tag with the received position information. Both the tag programmers and the position tags can be portable or fixed. Implementations include portable tag programmers and fixed position tags for subject position guidance, and portable tag programmers for collection sample labeling. Other implementations include fixed tag programmers and portable position tags for subject route recordation. Position tags can contain other associated information such as destination address of an affixed subject for subject routing.

  16. WIND TURBINE DRIVETRAIN TEST FACILITY DATA ACQUISITION SYSTEM

    SciTech Connect (OSTI)

    Mcintosh, J.

    2012-01-03T23:59:59.000Z

    The Wind Turbine Drivetrain Test Facility (WTDTF) is a state-of-the-art industrial facility used for testing wind turbine drivetrains and generators. Large power output wind turbines are primarily installed for off-shore wind power generation. The facility includes two test bays: one to accommodate turbine nacelles up to 7.5 MW and one for nacelles up to 15 MW. For each test bay, an independent data acquisition system (DAS) records signals from various sensors required for turbine testing. These signals include resistance temperature devices, current and voltage sensors, bridge/strain gauge transducers, charge amplifiers, and accelerometers. Each WTDTF DAS also interfaces with the drivetrain load applicator control system, electrical grid monitoring system and vibration analysis system.

  17. Toolbox for reconstructing quantum theory from rules on information acquisition

    E-Print Network [OSTI]

    Hoehn, Philipp A

    2015-01-01T23:59:59.000Z

    We develop a novel operational approach for reconstructing (qubit) quantum theory from elementary rules on information acquisition. The focus lies on an observer O interrogating a system S with binary questions and S's state is taken as O's `catalogue of knowledge' about S. The mathematical tools of the framework are simple and we attempt to highlight all underlying assumptions to provide a handle for future generalizations. Five principles are imposed, asserting (1) a limit on the amount of information available to O; (2) the mere existence of complementary information; (3) the possibility for O's information to be `in superposition'; (4) O's information to be preserved in between interrogations; and, (5) continuity of time evolution. This approach permits a constructive derivation of quantum theory, elucidating how the ensuing independence, complementarity and compatibility structure of O's questions matches that of projective measurements in quantum theory, how entanglement and monogamy of entanglement and...

  18. Triggering and data acquisition for the Hyper-Kamiokande experiment

    E-Print Network [OSTI]

    Dewhurst, Debra

    2015-01-01T23:59:59.000Z

    Hyper-Kamiokande has been proposed as a next generation neutrino oscillation experiment capable of observing accelerator, atmospheric, solar and astrophysical neutrinos, as well as possible proton decays, providing a rich scientific program. One of the main goals is the study of CP violation in the lepton sector. The Hyper-Kamiokande detector will be an underground water Cherenkov detector with a fiducial mass of 0.56 million metric tons, approximately 25 times larger than that of Super-Kamiokande. With such a large fiducial mass, the Hyper-Kamiokande detector will need a robust trigger and data acquisition system (DAQ) to be sensitive to the physics events of interest. Several UK institutions are participating in the development of the trigger and DAQ. Here we present some of the on going studies from the UK DAQ group.

  19. High-resolution magnetohydrodynamics simulation of black hole-neutron star merger: Mass ejection and short gamma-ray burst

    E-Print Network [OSTI]

    Kiuchi, Kenta; Kyutoku, Koutarou; Shibata, Masaru; Taniguchi, Keisuke; Wada, Tomohide

    2015-01-01T23:59:59.000Z

    We report results of a high-resolution numerical-relativity simulation for the merger of black hole-magnetized neutron star binaries on Japanese supercomputer "K". We focus on a binary that is subject to tidal disruption and subsequent formation of a massive accretion torus. We find the launch of thermally driven torus wind, subsequent formation of a funnel wall above the torus and a magnetosphere with collimated poloidal magnetic field, and high Blandford-Znajek luminosity. We show for the first time this picture in a self-consistent simulation. The turbulence-like motion induced by the non-axisymmetric magnetorotational instability as well as the Kelvin-Helmholtz instability inside the accretion torus works as an agent to drive the mass accretion and converts the accretion energy to thermal energy, which results in the generation of a strong wind. By an in-depth resolution study, we reveal that high resolution is essential to draw such a picture. We also discuss the implication for the r-process nucleosynth...

  20. Direct formation of supermassive black holes in metal-enriched gas at the heart of high-redshift galaxy mergers

    E-Print Network [OSTI]

    Mayer, Lucio; Bonoli, Silvia; Quinn, Thomas; Roskar, Rok; Shen, Sijing; Wadsley, James

    2014-01-01T23:59:59.000Z

    We present novel 3D multi-scale SPH simulations of gas-rich galaxy mergers between the most massive galaxies at $z \\sim 8 - 10$, designed to scrutinize the direct collapse formation scenario for massive black hole seeds proposed in \\citet{mayer+10}. The simulations achieve a resolution of 0.1 pc, and include both metallicity-dependent optically-thin cooling and a model for thermal balance at high optical depth. We consider different formulations of the SPH hydrodynamical equations, including thermal and metal diffusion. When the two merging galaxy cores collide, gas infall produces a compact, optically thick nuclear disk with densities exceeding $10^{-10}$ g cm$^3$. The disk rapidly accretes higher angular momentum gas from its surroundings reaching $\\sim 5$ pc and a mass of $\\gtrsim 10^9$ $M_{\\odot}$ in only a few $10^4$ yr. Outside $\\gtrsim 2$ pc it fragments into massive clumps. Instead, supersonic turbulence prevents fragmentation in the inner parsec region, which remains warm ($\\sim 3000-6000$ K) and dev...

  1. Readiness Review Training - Development of Criteria And Review...

    Office of Environmental Management (EM)

    Development of Criteria And Review Approach Documents Readiness Review Training - Development of Criteria And Review Approach Documents November 8-9, 2010 Readiness Review Training...

  2. LLE review

    SciTech Connect (OSTI)

    Keck, R.L. (ed.)

    1991-01-01T23:59:59.000Z

    This volume of the LLE Review, covering the period October-December 1991, contains articles on the analysis of argon-filled target experiments, and a theoretical analysis of the impact of nonlocal heat transport in laser filamentation in plasmas. In the Advanced Technology section there is an article on mechanisms that affect thin-film conductivity, and a report on the gain characteristics of the 20-cm SSA prototype amplifier to be used in the OMEGA Upgrade. Finally, the activities of the National Laser Users Facility and the GDL and OMEGA laser facilities are summarized. Highlights of the research reported in this issue are: argon radiation from argon-filled, polymer-shell targets is used as a core-temperature diagnostic and density diagnostic of the surrounding region in a regime where the argon line radiation is strongly absorbed. A theoretical analysis of the impact of nonlocal heat transport on laser filamentation in plasmas is developed. The resulting model is compared with experimental observations and the implications for ICF are discussed. A study of thermal conductivity in thin films seeks to identify mechanisms that result in degradation of thin-film conductivity. Identifying these mechanisms can lead to changes in the thin-film manufacture that will improve their resistance to laser damage.

  3. Estimating parameters of binary black holes from gravitational-wave observations of their inspiral, merger and ringdown

    E-Print Network [OSTI]

    Archisman Ghosh; Walter Del Pozzo; Parameswaran Ajith

    2015-05-21T23:59:59.000Z

    We characterize the expected statistical errors with which the parameters of black-hole binaries can be measured from gravitational-wave (GW) observations of their inspiral, merger and ringdown by a network of second-generation ground-based GW observatories. We simulate a population of black-hole binaries with uniform distribution of component masses in the interval $(3,80)~M_\\odot$, distributed uniformly in comoving volume, with isotropic orientations. From signals producing signal-to-noise ratio $\\geq 5$ in at least two detectors, we estimate the posterior distributions of the binary parameters using the Bayesian parameter estimation code LALInference. The GW signals will be redshifted due to the cosmological expansion and we measure only the "redshifted" masses. By assuming a cosmology, it is possible to estimate the gravitational masses by inferring the redshift from the measured posterior of the luminosity distance. We find that the measurement of the gravitational masses will be in general dominated by the error in measuring the luminosity distance. In spite of this, the component masses of more than $50\\%$ of the population can be measured with accuracy better than $\\sim 25\\%$ using the Advanced LIGO-Virgo network. Additionally, the mass of the final black hole can be measured with median accuracy $\\sim 18\\%$. Spin of the final black hole can be measured with median accuracy $\\sim 5\\% ~(17\\%)$ for binaries with non-spinning (aligned-spin) black holes. Additional detectors in Japan and India significantly improve the accuracy of sky localization, and moderately improve the estimation of luminosity distance, and hence, that of all mass parameters. We discuss the implication of these results on the observational evidence of intermediate-mass black holes and the estimation of cosmological parameters using GW observations.

  4. EFFECT OF A HIGH OPACITY ON THE LIGHT CURVES OF RADIOACTIVELY POWERED TRANSIENTS FROM COMPACT OBJECT MERGERS

    SciTech Connect (OSTI)

    Barnes, Jennifer; Kasen, Daniel [Departments of Physics and Astronomy, 366 LeConte Hall, University of California, Berkeley, CA 94720 (United States)

    2013-09-20T23:59:59.000Z

    The coalescence of compact objects is a promising astrophysical source of detectable gravitational wave signals. The ejection of r-process material from such mergers may lead to a radioactively powered electromagnetic counterpart signal which, if discovered, would enhance the science returns. As very little is known about the optical properties of heavy r-process elements, previous light-curve models have adopted opacities similar to those of iron group elements. Here we consider the effect of heavier elements, particularly the lanthanides, which increase the ejecta opacity by several orders of magnitude. We include these higher opacities in time-dependent, multi-wavelength radiative transport calculations to predict the broadband light curves of one-dimensional models over a range of parameters (ejecta masses {approx}10{sup -3}-10{sup -1} M{sub Sun} and velocities {approx}0.1-0.3 c). We find that the higher opacities lead to much longer duration light curves which can last a week or more. The emission is shifted toward the infrared bands due to strong optical line blanketing, and the colors at later times are representative of a blackbody near the recombination temperature of the lanthanides (T {approx} 2500 K). We further consider the case in which a second mass outflow, composed of {sup 56}Ni, is ejected from a disk wind, and show that the net result is a distinctive two component spectral energy distribution, with a bright optical peak due to {sup 56}Ni and an infrared peak due to r-process ejecta. We briefly consider the prospects for detection and identification of these transients.

  5. Steam turbine field testing techniques using a computerized data acquisition system

    SciTech Connect (OSTI)

    Shafer, H.S.; Cotton, K.C.; Kellyhouse, W.W.; Smith, D.P.

    1982-01-01T23:59:59.000Z

    An automatic data acquisition system for conducting full-scale ASME (1) acceptance tests of large steam turbine-generators is described. This includes the instrumentation, the interfacing hardware for analog to digital conversion and transmission of the data to the trailer mounted computer, the software that controls the acquisition of the data, and the calculation of test results. In addition, the application of this automatic data acquisition system for conducting the ASME acceptance test at Consumers Power Company's J.H. Campbell Unit 3 is discussed.

  6. FES Requirements Review 2014

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

    Review 2014 FES Attendees 2014 BES Requirements Review 2014 Requirements Review Reports Case Studies Contact Us Technical Assistance: 1 800-33-ESnet (Inside US) 1 800-333-7638...

  7. BES Requirements Review 2014

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

    Review 2014 BES Requirements Review 2014 BES Attendees 2014 Requirements Review Reports Case Studies Contact Us Technical Assistance: 1 800-33-ESnet (Inside US) 1 800-333-7638...

  8. Polar On-Line Acquisition Relay and Transmission System (POLARATS)

    SciTech Connect (OSTI)

    Yuracko, K.

    2004-07-15T23:59:59.000Z

    POLARATS (Polar On-Line Acquisition Relay And Transmission System) is being developed by YAHSGS LLC (YAHSGS) and Oak Ridge National Laboratory (ORNL) to provide remote, unattended monitoring of environmental parameters under harsh environmental conditions. In particular, instrumental design and engineering is oriented towards protection of human health in the Arctic, and with the additional goal of advancing Arctic education and research. POLARATS will obtain and transmit environmental data from hardened monitoring devices deployed in locations important to understanding atmospheric and aquatic pollutant migration as it is biomagnified in Arctic food chains. An Internet- and personal computer (PC)-based educational module will provide real time sensor data, on-line educational content, and will be integrated with workbooks and textbooks for use in middle and high school science programs. The educational elements of POLARATS include an Internet-based educational module that will instruct students in the use of the data and how those data fit into changing Arctic environments and food chains. POLARATS will: (1) Enable students, members of the community, and scientific researchers to monitor local environmental conditions in real time over the Internet; and (2) Provide additional educational benefits through integration with middle- and high-school science curricula. Information will be relayed from POLARATS devices to classrooms and libraries along with custom-designed POLARATS teaching materials that will be integrated into existing curricula to enhance the educational benefits realized from the information obtained.

  9. Toolbox for reconstructing quantum theory from rules on information acquisition

    E-Print Network [OSTI]

    Philipp A Hoehn

    2014-12-29T23:59:59.000Z

    We develop a novel operational approach for reconstructing (qubit) quantum theory from elementary rules on information acquisition. The focus lies on an observer O interrogating a system S with binary questions and S's state is taken as O's `catalogue of knowledge' about S. The mathematical tools of the framework are simple and we attempt to highlight all underlying assumptions to provide a handle for future generalizations. Five principles are imposed, asserting (1) a limit on the amount of information available to O; (2) the mere existence of complementary information; (3) the possibility for O's information to be `in superposition'; (4) O's information to be preserved in between interrogations; and, (5) continuity of time evolution. This approach permits a constructive derivation of quantum theory, elucidating how the ensuing independence, complementarity and compatibility structure of O's questions matches that of projective measurements in quantum theory, how entanglement and monogamy of entanglement and, more generally, how the correlation structure of arbitrarily many qubits and rebits arises. The principles yield a reversible time evolution and a quadratic measure, quantifying O's information about S. Finally, it is shown that the five principles admit two solutions for the simplest case of a single elementary system: the Bloch ball and disc as state spaces for a qubit and rebit, respectively, together with their symmetries as time evolution groups. The reconstruction is completed in a companion paper where an additional postulate eliminates the rebit case. This approach is conceptually close to the relational interpretation of quantum theory.

  10. G$^0$ Electronics and Data Acquisition (Forward-Angle Measurements)

    E-Print Network [OSTI]

    D. Marchand; J. Arvieux; L. Bimbot; A. Biselli; J. Bouvier; H. Breuer; R. Clark; J. -C. Cuzon; M. Engrand; R. Foglio; C. Furget; X. Grave; B. Guillon; H. Guler; P. M. King; S. Kox; J. Kuhn; Y. Ky; J. Lachniet; J. Lenoble; E. Liatard; J. Liu; E. Munoz; J. Pouxe; G. Quéméner; B. Quinn; J. -S. Réal; O. Rossetto; R. Sellem

    2007-03-15T23:59:59.000Z

    The G$^0$ parity-violation experiment at Jefferson Lab (Newport News, VA) is designed to determine the contribution of strange/anti-strange quark pairs to the intrinsic properties of the proton. In the forward-angle part of the experiment, the asymmetry in the cross section was measured for $\\vec{e}p$ elastic scattering by counting the recoil protons corresponding to the two beam-helicity states. Due to the high accuracy required on the asymmetry, the G$^0$ experiment was based on a custom experimental setup with its own associated electronics and data acquisition (DAQ) system. Highly specialized time-encoding electronics provided time-of-flight spectra for each detector for each helicity state. More conventional electronics was used for monitoring (mainly FastBus). The time-encoding electronics and the DAQ system have been designed to handle events at a mean rate of 2 MHz per detector with low deadtime and to minimize helicity-correlated systematic errors. In this paper, we outline the general architecture and the main features of the electronics and the DAQ system dedicated to G$^0$ forward-angle measurements.

  11. Dynamics of Galactic Disks and Mergers at z~1.6: Spatially Resolved Spectroscopy with Keck Laser Guide Star Adaptive Optics

    E-Print Network [OSTI]

    Shelley A. Wright; James E. Larkin; David R. Law; Charles C. Steidel; Alice E. Shapley; Dawn K. Erb

    2008-10-31T23:59:59.000Z

    We present 0.2" resolution near-infrared integral field spectroscopy of H-alpha emission from six star forming galaxies at z~1.6 (look-back time of ~9.6 Gyr). These observations were obtained with OSIRIS using the Keck Laser Guide Star Adaptive Optics system. All sources have a compact spatial extent of ~1", with an average half light radius of r=2.9 kpc and average dereddened star formation rate of 22 Msolar per year. Based on H-alpha kinematics we find that these six galaxies are dynamically distinguishable, and we classify them as either merger or disk candidate systems. We find three merger systems (HDF-BX1287, HDF-BX1315, and Q1623-BX491) with varying geometries and dynamical properties. Three galaxies (HDF-BMZ1299, Q2343-BX344, and Q2343-BM145) are well-fit by an inclined-disk model with low velocity residuals (20 to 46 km/sec). An average plateau velocity of v_p=185 km/sec is achieved within 1.0 kpc. The majority of observed velocity dispersions (~88 km/sec) can be explained by the residual seeing halo, and are not intrinsic to our sources. However, one merger and one disk candidate have high velocity dispersions (> 200 km/sec) that cannot be solely explained by beam smearing. For two disk candidates, we detect [NII] emission and are able to map the [NII]/H-alpha ratio on kiloparsec scales. In both cases, [NII] emission is more concentrated than H-alpha emission (metallicity studies that use nebular ratios. All disk candidates have likely completed only a few orbital periods, and if left unperturbed are excellent candidates to become present-day spiral galaxies.

  12. HUD's Environmental Review Training

    Office of Energy Efficiency and Renewable Energy (EERE)

    An environmental review is the process of reviewing a project and its potential environmental impacts to determine whether it meets  federal, state, and local environmental standards. The...

  13. Review: Hijacking Sustainability

    E-Print Network [OSTI]

    Antonelli, Monika

    2010-01-01T23:59:59.000Z

    addressing the attack on sustainability, Sharon Beder’s 2002Review: Hijacking Sustainability By Adrian Parr Reviewed byParr, Adrian. Hijacking Sustainability. Cambridge, MA: MIT

  14. Impact of acquisitions on short-run returns and leverage: two studies in corporate finance 

    E-Print Network [OSTI]

    Tao, Qizhi

    2009-01-01T23:59:59.000Z

    This dissertation consists of two empirical studies in corporate finance. The first study, The Impact of Acquisitions on the Short-Run Returns to Shareholders and Bondholders, investigates shareholder and bondholder ...

  15. Acquisition of cocaine and heroin self-administration in rats developmentally exposed to lead

    E-Print Network [OSTI]

    Rocha, Angelica

    2005-08-29T23:59:59.000Z

    (gestation/lactation) lead exposure on adult rates of acquisition of intravenous (i.v.) heroin self-administration and cocaine self-administration using an automated procedure that included both Pavlovian and operant components. Methods: For Experiment 1...

  16. Supervisory Control and Data Acquisition System Design for CO2 Enhanced Oil Recovery

    E-Print Network [OSTI]

    Sekhon, Jasjeet S.

    with low production rates such as CO2 enhanced oil recovery (EOR). This paper proposes a SCADA systemSupervisory Control and Data Acquisition System Design for CO2 Enhanced Oil Recovery Xie Lu College

  17. An Investigation into the Role of Implicit Knowledge in Adult Second Language Acquisition 

    E-Print Network [OSTI]

    Leonard Cook, Anna

    2009-01-01T23:59:59.000Z

    This thesis investigates the role of implicit knowledge in second language acquisition, presenting five experiments and related simulations based on artificial grammar learning. It examines whether second language learners ...

  18. Complexity within the Air Force acquisition system gaining insight from a theory of collapse

    E-Print Network [OSTI]

    Marticello, Daniel Nicholas, Jr

    2012-01-01T23:59:59.000Z

    Joseph Tainter's theory of societal collapse is applied in an examination of the U.S. Air Force's aircraft acquisition system in order to gain insight into the enterprise's lagging performance. Theories of collapse at both ...

  19. Policy Flash 2013-62 Acquisition Letter 09 - Revision of Department...

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

    Letter 09 - Revision of Department of Energy (DOE) Order 350.1 and Special H Clause Policy Flash 2013-62 Acquisition Letter 09 - Revision of Department of Energy (DOE) Order...

  20. Policy Flash 2014-37 Update to the Department of Energy Acquisition...

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

    and Measurement Plans for Cost-Reimbursement, Non-Management and Operating Contracts Policy Flash 2014-37 Update to the Department of Energy Acquisition Guide Chapter 16.2,...

  1. Policy Flash 2013-40 Acquisition Guide Chapter 43.3 - Maintaining...

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

    Contract Management of Non-Management and Operating (M&O) Cost Reimburstment Contracts Policy Flash 2013-40 Acquisition Guide Chapter 43.3 - Maintaining Alignment of Project...

  2. Policy Flash 2013-42 Acquisition Guide Chapter 19.1- Summary...

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

    19.1- Summary of Small Business Administration and Department of Energy Partnership Policy Flash 2013-42 Acquisition Guide Chapter 19.1- Summary of Small Business Administration...

  3. EMC Corporation: Managing IT M&A Integrations to Enable Profitable Growth by Acquisitions

    E-Print Network [OSTI]

    Tanriverdi, Hüseyin

    2011-08-01T23:59:59.000Z

    EMC Corporation is one of the fastest profitably growing public companies in the United States. It pursues both organic and acquisitive growth. Between 2005 and 2010, it acquired over 50 companies. EMC used to be a vendor ...

  4. E-Print Network 3.0 - acquisition regime radar Sample Search...

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

    except the data acquisition system and the controller unit... A New Coherent Radar for Ice Sounding in Greenland A. Moussessian 1 , R.L. Jordan 1 , E. Rodriguez... : (818)...

  5. Growth strategies : how software start-ups can leverage alliances, acquisitions, IPOs and venture capital

    E-Print Network [OSTI]

    Ybanez, Sergio D

    2007-01-01T23:59:59.000Z

    The identification of the different factors impacting a software start-up company's decision to pursue an alliance, acquisition, IPO or venture capital to sustain growth is the main objective of this research study. First ...

  6. Instructional Practices that Promote Acquisition and Generalization of Skills by Learning Disabled Adolescents

    E-Print Network [OSTI]

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

    1980-01-01T23:59:59.000Z

    While most efforts in programming for learning disabled adolescents have been directed to the content of instructional offering, the authors identify procedures to promote acquisition and generalization of skills . Exemplified ...

  7. The Effects of Hypertext Glosses on L2 Vocabulary Acquisition: A Meta-Analysis

    E-Print Network [OSTI]

    Yun, Jeehwan

    2010-04-14T23:59:59.000Z

    In the field of second language acquisition (SLA), "comprehensible input" (Krashen, 1985) has been considered a critical factor to help learners acquire foreign and second languages (L2). From this perspective, the notion ...

  8. Defense acquisition program manager as program leader : improving program outcomes through key competencies and relationship management

    E-Print Network [OSTI]

    Baumann, B. Marc

    2013-01-01T23:59:59.000Z

    The US defense acquisition system is a massive enterprise charged with developing and acquiring state-of-the-art military technology and systems. For the past 65 years, many broad-reaching studies and commissions have ...

  9. Age effects in L2 acquisition: ultimate attainment at the syntax-morphology interface 

    E-Print Network [OSTI]

    Komar, Paulina

    2010-11-24T23:59:59.000Z

    This paper presents a selective overview of studies that have examined age effects in second language (L2) acquisition. The focus was on adult second language learners and the L2 ultimate attainment at syntax-interface morphology, with particular...

  10. Needle-free interstitial fluid acquisition using a Lorentz-force actuated jet injector

    E-Print Network [OSTI]

    Chang, Jean H

    2014-01-01T23:59:59.000Z

    Interstitial fluid (ISF) provides information on a patient's health as it contains regulatory molecules that are correlated with disease-related processes. However, current ISF acquisition techniques can be slow, resulting ...

  11. A Knowledge Acquisition Tool for Course of Action Analysis* Ken Barker1

    E-Print Network [OSTI]

    Forbus, Kenneth D.

    A Knowledge Acquisition Tool for Course of Action Analysis* Ken Barker1 , Jim Blythe2 , Gary Gil2 , Boris Katz3 , Jihie Kim2 , Gary King6 , Sunil Mishra4 , Clayton Morrison6 , Ken Murray4

  12. Acquisition of renogenic competence in the early mouse embryo and embryonic stem cells 

    E-Print Network [OSTI]

    Ganeva, Veronika Veskova

    2011-11-25T23:59:59.000Z

    The acquisition of renogenic competence (the ability to give rise to kidney) during embryonic development is not yet fully understood. Clarifying the temporal and molecular aspects of this process is equally essential ...

  13. Designing a Procedure for the Acquisition of Probability Constraints for Bayesian Networks

    E-Print Network [OSTI]

    Utrecht, Universiteit

    Designing a Procedure for the Acquisition of Probability Constraints for Bayesian Networks Eveline and Computing Sciences, Utrecht University, P.O. Box 80.089, 3508 TB Utrecht, The Netherlands {eveline

  14. Framework for the selection of acquisition targets applied in the commercial aerospace industry

    E-Print Network [OSTI]

    Tajima, Michael (Michael Ken)

    2010-01-01T23:59:59.000Z

    Acquisitions are costly, even the ones that never happen. They require a significant commitment of resources involving multi-disciplinary teams examining all aspects of a business. This can come at a significant cost if ...

  15. Program and Project Management Policy for the Planning, Programming, Budgeting, and Acquisition of Capital Assets

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

    2000-06-10T23:59:59.000Z

    To establish Department of Energy (DOE) program and project management policy for the planning, programming, budgeting, and acquisition of capital assets consistent with the following Office of Management and Budget (OMB) circulars: OMB Circular A-11, Part 3, Planning, Budgeting, and Acquisition of Capital Assets, and the supplement to Part 3, Capital Programming Guide; OMB Circular A-123; OMB Circular A-127; and OMB Circular A-130. Does not cancel other directives. Canceled by DOE N 251.99

  16. Acquisition and reconstruction of brain tissue using knife-edge scanning microscopy

    E-Print Network [OSTI]

    Mayerich, David Matthew

    2004-09-30T23:59:59.000Z

    ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis by DAVID MATTHEW MAYERICH Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE December 2003 Major Subject: Computer Science ACQUISITION AND RECONSTRUCTION OF BRAIN TISSUE USING KNIFE- EDGE SCANNING MICROSCOPY A Thesis by DAVID MATTHEW MAYERICH Submitted to Texas...

  17. An acquisition system based on a network of microvax's running the realtime DEC VAXELN operating system

    SciTech Connect (OSTI)

    D'Antone, I.; Mandrioli, G.; Matteuzzi, P.; Sanzani, G. (Bologna Univ. (Italy). Dipt. di Fisica); Bloise, C.; Grillo, A.F.; Marini, A.; Ronga, F. (INFN Laboratori Nazionali di Frascati, C.P.13, 00044 Frascati (IT)); Baldini, A. (Via Livornese, San Piero a Grado, 56100 Pisa (IT)); Mancarella, G.; Palamara, O.; Surdo, A. (Lecce Univ. (Italy). Ist. di Fisica)

    1989-10-01T23:59:59.000Z

    The authors describe an acquisition system based on a network (Ethernet/DECNET) of MicroVAX's running in the VAXELN environment. VAXELN is a Digital Equipment software product for the development of dedicated, real time systems for VAX processors. A central VAX running under the VAX/VMS operating system is used as file server and as an interface of the acquisition system with respect to the user's world.

  18. Percutaneous Vertebroplasty: Preliminary Experiences with Rotational Acquisitions and 3D Reconstructions for Therapy Control

    SciTech Connect (OSTI)

    Hodek-Wuerz, Roman [University Hospital Basel, Department of Radiology, Section of Neuroradiology (Switzerland)], E-mail: hodekr@uhbs.ch; Martin, Jean-Baptiste [University Hospital Geneve, Department of Radiology, Section of Neuroradiology (Switzerland); Wilhelm, Kai [University Hospital of Bonn, Department of Radiology (Germany); Lovblad, Karl O. [University Hospital Geneve, Department of Radiology, Section of Neuroradiology (Switzerland); Babic, Drazenko [Philips Medical System (Netherlands); Rufenacht, Daniel A. [University Hospital Geneve, Department of Radiology, Section of Neuroradiology (Switzerland); Wetzel, Stefan G. [University Hospital Basel, Department of Radiology, Section of Neuroradiology (Switzerland)

    2006-10-15T23:59:59.000Z

    Percutaneous vertebroplasty (PVP) is carried out under fluoroscopic control in most centers. The exclusion of implant leakage and the assessment of implant distribution might be difficult to assess based on two-dimensional radiographic projection images only. We evaluated the feasibility of performing a follow-up examination after PVP with rotational acquisitions and volumetric reconstructions in the angio suite. Twenty consecutive patients underwent standard PVP procedures under fluoroscopic control. Immediate postprocedure evaluation of the implant distribution in the angio suite (BV 3000; Philips, The Netherlands) was performed using rotational acquisitions (typical parameters for the image acquisition included a 17-cm field-of-view, 200 acquired images for a total angular range of 180{sup o}). Postprocessing of acquired volumetric datasets included multiplanar reconstruction (MPR), maximum intensity projection (MIP), and volume rendering technique (VRT) images that were displayed as two-dimensional slabs or as entire three-dimensional volumes. Image evaluation included lesion and implant assessment with special attention given to implant leakage. Findings from rotational acquisitions were compared to findings from postinterventional CT. The time to perform and to postprocess the rotational acquisitions was in all cases less then 10 min. Assessment of implant distribution after PVP using rotational image acquisition methods and volumetric reconstructions was possible in all patients. Cement distribution and potential leakage sites were visualized best on MIP images presented as slabs. From a total of 33 detected leakages with CT, 30 could be correctly detected by rotational image acquisition. Rotational image acquisitions and volumetric reconstruction methods provided a fast method to control radiographically the result of PVP in our cases.

  19. Bates solar industrial process-steam application: preliminary design review

    SciTech Connect (OSTI)

    Not Available

    1980-01-07T23:59:59.000Z

    The design is analyzed for a parabolic trough solar process heat system for a cardboard corrugation fabrication facility in Texas. The program is briefly reviewed, including an analysis of the plant and process. The performance modeling for the system is discussed, and the solar system structural design, collector subsystem, heat transport and distribution subsystem are analyzed. The selection of the heat transfer fluid, and ullage and fluid maintenance are discussed, and the master control system and data acquisition system are described. Testing of environmental degradation of materials is briefly discussed. A brief preliminary cost analysis is included. (LEW)

  20. PEER REVIEW PROGRAM

    SciTech Connect (OSTI)

    MOGHISSI, A ALAN; LOVE, BETTY R; STRAJA, SORIN R

    2007-09-29T23:59:59.000Z

    The Institute for Regulatory Science (RS) and the American Society of Mechanical Engineers (ASME) jointly estab lished a peer-review program. As the program evolved, four types of review were established. A process for stakeholder participation in peer review eetings was also developed. While a committee established by the ASME provided oversight to the peer-review process, the RSI managed the day-to-day operations of peer review panels. In addition to the reports resulting from peer review of specific projects, several documents were prepared to facilitate the review process, all of which were widely distributed.