Sample records for television sets radios

  1. Satellite Television Industry Meeting Regarding DOE Set-Top Box...

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

    regarding the pending DOE rulemaking to establish energy conservation standards on set-top boxes (STBs) under title Ill of the Energy Policy and Conservation Act of 1974, as...

  2. PERFECTION, WRETCHED, NORMAL, AND NOWHERE: A REGIONAL GEOGRAPHY OF AMERICAN TELEVISION SETTINGS

    E-Print Network [OSTI]

    Campbell, Gabriel Scott

    2011-05-28T23:59:59.000Z

    ACKNOWLEDGMENTS This dissertation has logged a lot of miles. Portions of it were written on the window sill of a laundromat in Cañon City, Colorado, at an airport bar in Little Rock, Arkansas, and at countless coffee shops, libraries, and hotels in Illinois..., Alabama, Virginia, Mississippi, and Georgia); the West (Oregon, Nevada, Colorado, Montana, Washington, Idaho, Wyoming, Utah, New Mexico, and Arizona), and the Midwest. Because of the large volume of material detailing the television landscapes...

  3. Television 2.0 : reconceptualizing TV as an engagement medium

    E-Print Network [OSTI]

    Askwith, Ivan D

    2007-01-01T23:59:59.000Z

    Television is in a period of dramatic change. As the mass audience continues to fragment into ever-smaller niche audiences and communities of interest, and new technologies shift control over the television viewing experience ...

  4. Social TV : the future of television in the Internet Age

    E-Print Network [OSTI]

    Summa, Giacomo

    2011-01-01T23:59:59.000Z

    Television's influence on culture and society has been widely acknowledged for many years. On the other hand, with the diffusion of the web and of social networks such as Facebook and Twitter, used in concert with television, ...

  5. DIDACTICAL HOLOGRAPHIC EXHIBIT INCLUDING (HOLOGRAPHIC TELEVISION)

    E-Print Network [OSTI]

    de Aguiar, Marcus A. M.

    DIDACTICAL HOLOGRAPHIC EXHIBIT INCLUDING HoloTV (HOLOGRAPHIC TELEVISION) José J. Lunazzi , DanielCampinasSPBrasil Abstract: Our Institute of Physics exposes since 1980 didactical exhibitions of holography in Brazil where

  6. JOB OPENING POSITION: TV WeatherCenter Intern (unpaid internship)

    E-Print Network [OSTI]

    Parker, Matthew D. Brown

    JOB OPENING POSITION: TV WeatherCenter Intern (unpaid internship) JOB NUMBER: 12081 DIVISION/DEPARTMENT: WRAL-TV - Weather DESCRIPTION: THIS IS AN UNPAID INTERNSHIP. Interns in the WRAL HD Weather of North Carolina. The internship will feature hands-on experience in all aspects of television and radio

  7. Say Hello to Stricter TV Standards | Department of Energy

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

    past couple of years to reduce the power consumption of TVs. For example, LED (light emitting diode) technology is expected to be the leading backlight technology for LCD TV sets...

  8. Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 1, Methodology

    SciTech Connect (OSTI)

    Not Available

    1993-11-01T23:59:59.000Z

    The Energy Policy and Conservation Act (P.L. 94-163), as amended, establishes energy conservation standards for 12 of the 13 types of consumer products specifically covered by the Act. The legislation requires the Department of Energy (DOE) to consider new or amended standards for these and other types of products at specified times. DOE is currently considering amending standards for seven types of products: water heaters, direct heating equipment, mobile home furnaces, pool heaters, room air conditioners, kitchen ranges and ovens (including microwave ovens), and fluorescent light ballasts and is considering establishing standards for television sets. This Technical Support Document presents the methodology, data, and results from the analysis of the energy and economic impacts of the proposed standards. This volume presents a general description of the analytic approach, including the structure of the major models.

  9. Rhythms and plasticity: television temporality at home

    E-Print Network [OSTI]

    Irani, Lilly; Jeffries, Robin; Knight, Andrea

    2010-01-01T23:59:59.000Z

    priority. Plastic television watching did not demand com-and domestic demands [5]. 5.7 Nearly plastic Many of the

  10. The effects of mergers in broadcast television

    E-Print Network [OSTI]

    Rainey, Mark Christopher, 1974-

    2001-01-01T23:59:59.000Z

    In 1999 the Federal Communications Commission decided to relax its prohibition against one firm owning two television stations in the same market. Although joint ownership was prohibited prior to 1999, evidence on the ...

  11. How to Discuss Statistics on Live Television Jeffrey S. Rosenthal, University of Toronto

    E-Print Network [OSTI]

    Rosenthal, Jeffrey S.

    ), and one at the undergraduate level (Probability and Statistics: The Science of Uncertainty, with M numerous interviews with television, radio, and print media concerning probability and statistics at the age of 29. He has received several Natural Sciences and Engineering Research Council of Canada

  12. Upgrade LCDs or TVs with improved ergonomic adjustability

    E-Print Network [OSTI]

    Saskatchewan, University of

    Highlights · Upgrade LCDs or TVs with improved ergonomic adjustability · Constant Force (CFTM) patented lift-and-pivot motion technology produces smooth adjustment · Neo-Flex LCD Stand is the only range of movement to your LCD display or TV with the Neo-Flex LCD Stand! This proven technology is now

  13. Energy-efficient lighting system for television

    DOE Patents [OSTI]

    Cawthorne, Duane C. (Amarillo, TX)

    1987-07-21T23:59:59.000Z

    A light control system for a television camera comprises an artificial light control system which is cooperative with an iris control system. This artificial light control system adjusts the power to lamps illuminating the camera viewing area to provide only sufficient artificial illumination necessary to provide a sufficient video signal when the camera iris is substantially open.

  14. Assessment of SEAD Global Efficiency Medals for Televisions

    E-Print Network [OSTI]

    Young, Park, Won

    2013-01-01T23:59:59.000Z

    manufacturers to use fewer LED lamps as well as low-voltageDiode (LED) backlit LCD TVs Cold Cathode Fluorescent LampLED-LCD TVs. Conventional technology is defined as Cold Cathode Fluorescent Lamp

  15. Life cycle assessment of TV sets in China: A case study of the impacts of CRT monitors

    SciTech Connect (OSTI)

    Song Qingbin [Faculty of Science and Technology, University of Macau (Macao); Wang Zhishi, E-mail: zswang@umac.mo [Faculty of Science and Technology, University of Macau (Macao); Li Jinhui; Zeng Xianlai [School of Environment, Tsinghua University, Beijing 100084 (China)

    2012-10-15T23:59:59.000Z

    Along with the rapid increase in both production and use of TV sets in China, there is an increasing awareness of the environmental impacts related to the accelerating mass production, electricity use, and waste management of these sets. This paper aims to describe the application of life cycle assessment (LCA) to investigate the environmental performance of Chinese TV sets. An assessment of the TV set device (focusing on the Cathode Ray Tube (CRT) monitor) was carried out using a detailed modular LCA based on the international standards of the ISO 14040 series. The LCA was constructed using SimaPro software version 7.2 and expressed with the Eco-indicator' 99 life cycle impact assessment method. For a sensitivity analysis of the overall LCA results, the CML method was used in order to estimate the influence of the choice of the assessment method on the results. Life cycle inventory information was compiled by Ecoinvent 2.2 databases, combined with literature and field investigations on the current Chinese situation. The established LCA study shows that the use stage of such devices has the highest environmental impact, followed by the manufacturing stage. In the manufacturing stage, the CRT and the Printed Circuit Board (PCB) are those components contributing the most environmental impacts. During the use phase, the environmental impacts are due entirely to the methods of electricity generation used to run them, since no other aspects were taken into account for this phase. The final processing step-the end-of-life stage-can lead to a clear environmental benefit when the TV sets are processed through the formal dismantling enterprises in China.

  16. Network Television and the Digital Threat

    E-Print Network [OSTI]

    Lapan, Lisa

    2009-01-01T23:59:59.000Z

    NETWORK TV AND THE DIGITAL THREAT tertainment are availableNETWORK TV AND THE DIGITAL THREAT luring users to watch the91 Ryan Nakashima, Digital Threat Prompts Movie Industry

  17. The Use of a Solid State Analog Television Transmitter as a Superconducting Electron Gun Power Amplifier

    SciTech Connect (OSTI)

    J.G. Kulpin, K.J. Kleman, R.A. Legg

    2012-07-01T23:59:59.000Z

    A solid state analog television transmitter designed for 200 MHz operation is being commissioned as a radio frequency power amplifier on the Wisconsin superconducting electron gun cavity. The amplifier consists of three separate radio frequency power combiner cabinets and one monitor and control cabinet. The transmitter employs rugged field effect transistors built into one kilowatt drawers that are individually hot swappable at maximum continuous power output. The total combined power of the transmitter system is 33 kW at 200 MHz, output through a standard coaxial transmission line. A low level radio frequency system is employed to digitally synthesize the 200 MHz signal and precisely control amplitude and phase.

  18. Instructional Television Instructor Handbook Instructor Handbook

    E-Print Network [OSTI]

    Karsai, Istvan

    Campus Overview Interactive Instructional Television at ETSU is a way for students who do not live near-3011 747-5715 392-8016 439-7499 439-6809 kingk@etsu.edu nelsonr@etsu.edu smithdl@etsu.edu haefs@etsu.edu fraleyc@etsu.edu roseg@etsu.edu browsd01@etsu.edu ritchies@etsu.edu 2 Introduction to the Equipment

  19. UITV University of Iowa Cable Television ITS VIDEO SERVICES

    E-Print Network [OSTI]

    UITV ­ University of Iowa Cable Television ITS VIDEO SERVICES 1 UITV Telecommunication and Network Services ITS Video Services 23 Lindquist Center 319-335-5898 UITV, University of Iowa Cable Television Operations Report Calendar Year 2006 February 12, 2007 ­ Michael J. McBride, Video Services Program Manager

  20. UITV University of Iowa Cable Television ITS VIDEO SERVICES

    E-Print Network [OSTI]

    UITV ­ University of Iowa Cable Television ITS VIDEO SERVICES 1 UITV Report for Fiscal Year July 1 and Student Video Productions. o Programs are received from satellite programming services, like SCOLA foreign a venue for student programming, like Daily Iowan Television News and Student Video Productions. · On July

  1. Non-Intrusive User Interfaces for Interactive Digital Television Experiences

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Non-Intrusive User Interfaces for Interactive Digital Television Experiences Pablo Cesar1 , Dick C.Cruz-Lara@loria.fr, Julien.Ducret@loria.fr Abstract. This paper presents a model and architecture for non-intrusive user to consume and interact with television content. We refer to this model as non-intrusive user interfaces

  2. Weather Internship opportunity with KITV 4 Island Television is the ABC television affiliate in Honolulu, Hawai`i.

    E-Print Network [OSTI]

    Weather Internship opportunity with KITV 4 Island Television is the ABC television affiliate in Honolulu, Hawai`i. KITV recognizes that a good internship program can add practical experience to the education a student gains in college or graduate school. KITV has a long-established Internship Program

  3. Mobile and Interactive Social Television A Virtual TV Room Francesco Cricri

    E-Print Network [OSTI]

    Gabbouj, Moncef

    .curcio@nokia.com Moncef Gabbouj Tampere University of Technology Tampere, Finland moncef.gabbouj@tut.fi Abstract Smart on the market. People often prefer to watch TV programs, such as a football game or a movie, together with other be located in a relatively restricted geographical area, in order to be able to meet each other at home

  4. atlas tv project: Topics by E-print Network

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

    television (iTV) Keywords Narrative patterns, Interactive Television (iTV), Interactive Media (i-media) Introduction The development of interactive TV (iTVWinky Dink and You:...

  5. U.S. Energy Department, Pay-Television Industry and Energy Efficiency...

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

    - developed through a non-regulatory agreement between the pay-TV industry, the consumer electronics industry and energy efficiency advocates - will improve set-top box efficiency...

  6. On the use of Satellite Television in High Energy Physics

    E-Print Network [OSTI]

    Lucas Taylor; David O. Williams

    1998-10-24T23:59:59.000Z

    This paper assesses the feasibility of exploiting commercial satellite television technologies to broadcast video signals and data from major High Energy Physics facilities to collaborating institutes throughout the world.

  7. Tomorrow's television and computer screens could be brighter, clearer and

    E-Print Network [OSTI]

    of a conjugated organic polymer--widely used as a conductive material in devices such as light-emitting diodes material in organic light-emitting diodes, PEDOT is found in many electronic devices, such as televisions

  8. Environmental video : personal forms for television's public context

    E-Print Network [OSTI]

    Grabill, Elliott Vincent

    1981-01-01T23:59:59.000Z

    Broadcast television is a fixture in our lives, a utility comparable to the telephone or the electric current running into our homes. In developing an artistic statement in the video medium, the artist must take this ...

  9. Managing On-air Ad Inventory in Broadcast Television

    E-Print Network [OSTI]

    Bollapragada, Srinivas; Mallik, Suman

    2008-01-01T23:59:59.000Z

    Motivated by the experiences of the National Broadcasting Company (NBC), we present an analytical model for managing on-air ad inventory in broadcast television. The ad inventory in this industry is priced based on rating ...

  10. A Review of the 2011 and 2013 Digital Television Energy Efficiency Regulations Developed and Adopted by the California Energy Commission

    E-Print Network [OSTI]

    Wazzan, C. Paul; Eash, Dawn E.

    2011-01-01T23:59:59.000Z

    Television Energy Efficiency Regulations See PG&E Revisednecessitate energy con- trol and regulation are dubious atTelevision Energy Efficiency Regulations THE CALIFORNIA

  11. Audience research for fun and profit : rediscovering the value of television audiences

    E-Print Network [OSTI]

    Seles, Sheila Murphy

    2010-01-01T23:59:59.000Z

    The American television industry is in a moment of transition because of changes brought about by digital distribution and audience fragmentation. This thesis argues that the television industry can no longer adapt to the ...

  12. Measurements and Analysis of Secondary User Device Effects on Digital Television Receivers

    E-Print Network [OSTI]

    Newman, Timothy Ray; DePardo, Daniel; Wyglinski, Alexander M.; Evans, Joseph B.; Rajbanshi, Rakesh; Petty, Victor R.; Datla, Dinesh; Weidling, Frederick; Kolodzy, Paul J.; Marcus, Michael J.; Minden, Gary J.; Roberts, James A.

    2009-11-30T23:59:59.000Z

    This article presents results from a study of the potential effects of secondary users operating in unoccupied television spectrum. Television spectrum is known within the wireless communications community as being ...

  13. The development of high definition television : an ecology of games

    E-Print Network [OSTI]

    Neil, Suzanne Chambliss

    2010-01-01T23:59:59.000Z

    This study is an analysis of the forces that shaped the overall character of a new US television system, high definition or HDTV, between the early 1980s and 2010, with a primary focus on the period leading up the Federal ...

  14. The SEAD global efficiency medal competition: accelerating market transformation for efficient televisions

    SciTech Connect (OSTI)

    Ravi, Kavita [US Department of Energy, Washington, DC (United States)] [US Department of Energy, Washington, DC (United States); Bennich, Peter [Swedish Energy Agency (Sweden)] [Swedish Energy Agency (Sweden); Cockburn, John [Natural Resources Canada, Ottawa (Canada)] [Natural Resources Canada, Ottawa (Canada); Doi, Naoko [Institute of Energy Economics (Japan)] [Institute of Energy Economics (Japan); Garg, Sandeep [United Nations Development Programme, New York, NY (United States)] [United Nations Development Programme, New York, NY (United States); Garnaik, S.P. [ICF International (India)] [ICF International (India); Holt, Shane [Energy and Tourism, Canberra (Australia)] [Energy and Tourism, Canberra (Australia); Walker, Mike [Food and Rural Affairs (United Kingdom)] [Food and Rural Affairs (United Kingdom); Westbrook-Trenholm, Elizabeth [Natural Resources, Canada, Ottawa (Canada). Office of Energy Efficiency] [Natural Resources, Canada, Ottawa (Canada). Office of Energy Efficiency; Lising, Anna [Collaborative Labeling and Appliance Standards Program (United States)] [Collaborative Labeling and Appliance Standards Program (United States); Pantano, Steve [Collaborative Labeling and Appliance Standards Program (United States)] [Collaborative Labeling and Appliance Standards Program (United States); Khare, Amit [Collaborative Labeling and Appliance Standards Program (United States)] [Collaborative Labeling and Appliance Standards Program (United States); Park, Won Young [Lawrence Berkeley National Lab., CA (United States)] [Lawrence Berkeley National Lab., CA (United States)

    2013-10-15T23:59:59.000Z

    The Global Efficiency Medal competition, a cornerstone activity of the Super-efficient Equipment and Appliance Deployment (SEAD) Initiative, is an awards program that encourages the production and sale of super-efficient products. SEAD is a voluntary multinational government collaboration of the Clean Energy Ministerial (CEM). This winner-takes-all competition recognizes products with the best energy efficiency, guides early adopter purchasers towards the most efficient product choices and demonstrates the levels of energy efficiency achievable by commercially available and emerging technologies. The first Global Efficiency Medals were awarded to the most energy-efficient flat panel televisions; an iconic consumer purchase. SEAD Global Efficiency Medals were awarded to televisions that have proven to be substantially more energy efficient than comparable models available at the time of the competition (applications closed in the end of May 2012). The award-winning TVs consume between 33 to 44 percent less energy per 2 unit of screen area than comparable LED-backlit LCD televisions sold in each regional market and 50 to 60 percent less energy than CCFL-backlit LCD TVs. Prior to the launch of this competition, SEAD conducted an unprecedented international round-robin test (RRT) to qualify TV test laboratories to support verification testing for SEAD awards. The RRT resulted in increased test laboratory capacity and expertise around the world and ensured that the test results from participating regional test laboratories could be compared in a fair and transparent fashion. This paper highlights a range of benefits resulting from this first SEAD awards competition and encourages further investigation of the awards concept as a means to promote energy efficiency in other equipment types.

  15. Carrier-frequency synchronization system for improved amplitude modulation and television broadcast reception

    DOE Patents [OSTI]

    Smith, Stephen F.; Moore, James A.

    2003-05-13T23:59:59.000Z

    Systems and methods are described for carrier-frequency synchronization for improved AM and TV broadcast reception. A method includes synchronizing a carrier frequency of a broadcast signal with a remote reference frequency. An apparatus includes a reference signal receiver; a phase comparator coupled to the reference signal receiver; a voltage controlled oscillator coupled to the phase comparator; and a radio frequency output coupled to the voltage controlled oscillator.

  16. TV, Digital, and Social: A Debate

    E-Print Network [OSTI]

    Wang, Jing

    2015-01-01T23:59:59.000Z

    One of the important debates in the social media era regards the future of television. Is TV still relevant? This is both a methodological and pedagogical issue for teachers and students researching contemporary media ...

  17. Value chain dynamics and evolving consumer demographics in the American television industry

    E-Print Network [OSTI]

    Skot, Tessa Ann

    2014-01-01T23:59:59.000Z

    The American television industry has always been one of very fast 'clockspeed,' characterized by the rapid pace of innovation and the emergence of new business models. This has never been truer than now. The entrance of ...

  18. Carrier phase synchronization system for improved amplitude modulation and television broadcast reception

    DOE Patents [OSTI]

    Smith, Stephen F. (Loudon, TN) [Loudon, TN; Moore, James A. (Powell, TN) [Powell, TN

    2009-09-08T23:59:59.000Z

    Systems and methods are described for carrier phase synchronization for improved AM and TV broadcast reception. A method includes synchronizing the phase of a carrier frequency of a broadcast signal with the phase of a remote reference frequency. An apparatus includes a receiver to detect the phase of a reference signal; a phase comparator coupled to the reference signal-phase receiver; a voltage controlled oscillator coupled to the phase comparator; and a phase-controlled radio frequency output coupled to the voltage controlled oscillator.

  19. Carrier phase synchronization system for improved amplitude modulation and television broadcast reception

    DOE Patents [OSTI]

    Smith, Stephen F. (Loudon, TN); Moore, James A. (Powell, TN)

    2011-02-01T23:59:59.000Z

    Systems and methods are described for carrier phase synchronization for improved AM and TV broadcast reception. A method includes synchronizing the phase of a carrier frequency of a broadcast signal with the phase of a remote reference frequency. An apparatus includes a receiver to detect the phase of a reference signal; a phase comparator coupled to the reference signal-phase receiver; a voltage controlled oscillator coupled to the phase comparator; and a phase-controlled radio frequency output coupled to the voltage controlled oscillator.

  20. Texas cable television franchises and compliance with the 1972 FCC rules

    E-Print Network [OSTI]

    Kabrich, Phillip Wayne

    1974-01-01T23:59:59.000Z

    moving into the nation's major. metropolitan areas, and a ncw dimension has been added Lo the industry: two-way cable com- munications. The lifting of the PCC's "freeze" on cable systems in the nation's top 100 television market areas seemed to open...TEXAS CABLE TELEVISION FRANCHISES AND COMPLIANCE WITH THE 1972 FCC RULES A Thesi. s by PHILLIP WAYNE KABRICH Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirements for the degree of MASTER...

  1. TV Energy Consumption Trends and Energy-Efficiency Improvement Options

    E-Print Network [OSTI]

    Park, Won Young

    2011-01-01T23:59:59.000Z

    and Low Power Mode Energy Consumption”, Energy Efficiency inTV Shipments on Energy Consumption.. 22 Figure 3-1.Estimates of Annual Energy Consumption in 3D mode of 3D TVs

  2. A Social Semiotic Discourse Analysis of Film and Television Portrayals of Agriculture: Implications for American Cultural Memory

    E-Print Network [OSTI]

    Specht, Annie

    2013-04-27T23:59:59.000Z

    , the traditional family farm, and the decline of the agrarian tradition—a social semiotic content analysis of 23 films and television programs released between 1950 and 2012 was conducted to identify parallels between the content of those media texts...

  3. The U.S. cable television industry : the multi-service operator organizational structure as a bundle of competencies

    E-Print Network [OSTI]

    Moorthy, Satish K. (Satish Kumar)

    2009-01-01T23:59:59.000Z

    The United States cable television industry is experiencing fierce competition from telephone companies and content providers, as well as new and possibly unknown entrants. As organizations in the industry are currently ...

  4. Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 3, Water heaters, pool heaters, direct heating equipment, and mobile home furnaces

    SciTech Connect (OSTI)

    Not Available

    1993-11-01T23:59:59.000Z

    This is Volume 3 in a series of documents on energy efficiency of consumer products. This volume discusses energy efficiency of water heaters. Water heaters are defined by NAECA as products that utilize oil, gas, or electricity to heat potable water for use outside the heater upon demand. These are major appliances, which use a large portion (18% on average) of total energy consumed per household (1). They differ from most other appliances in that they are usually installed in obscure locations as part of the plumbing and are ignored until they fail. Residential water heaters are capable of heating water up to 180{degrees}F, although the setpoints are usually set lower.

  5. Televised political satire: the new media of political humor and implications for presidential elections

    E-Print Network [OSTI]

    McKenzie, John Marshall, II

    2009-05-15T23:59:59.000Z

    to counteract the bumbler image. 4 It?s clear the power Nessen saw in satire, and how television magnified this power by enabling such a large audience to partake in it. He goes on in his biography to write about how he decided to host an episode... Night Live used him to make his appearance seem like the Ford White House endorsed this type of vulgarity. He attributes great power to Saturday Night Live and the media when it comes to determining the outcome of the 1976 election. He calls...

  6. Losing Sight of Ourselves: Applying Durkheim. Giddens, Baudrillard and Vaknin to Reality Television

    E-Print Network [OSTI]

    Collins, Megan Elizabeth

    2011-02-22T23:59:59.000Z

    more disciplining? (Durkheim 1951:253). Consumerism allows for the possibility of accumulating an infinite amount of goods and possessions. When one is hungry, they usually stop eating when their body tells them ?hey, I?m full.? Yes, overeating... and jump at the chance to participate in reality television programs. Look at me, here I am, don?t you think I?m great?!? I need to know 13 that you think I?m great! Mark Andrejevic believes this phenomenon is both ?a fascination with voyeurism...

  7. Satellite Television Industry Meeting Regarding DOE Set-Top Box Rulemaking

    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 OverviewRepository | DepartmentSEA-04:DepartmentSara C. Pryor About UsSarai|

  8. Authoring and Presentation Tools for Distance Learning over Interactive TV

    E-Print Network [OSTI]

    Erdem, Cigdem Eroglu

    questions into interactive exams, and a virtual teacher whose facial animation is automatically generated]: Multimedia Information Systems ­ animations, evaluation/methodology, video. General Terms Management, Design, Human Factors. Keywords Distance education, interactive TV, set-top-box, multimedia presentation. 1

  9. Voice of the Sea Wins Six Telly Awards Voice of the Sea television series, a signature project of the University of Hawai`i Sea Grant Center

    E-Print Network [OSTI]

    Voice of the Sea Wins Six Telly Awards Voice of the Sea television series, a signature project Awards, which are the premier regional television awards honoring excellence in programming. Voice." Voice of the Sea won a silver Telly, the most prestigious award, for Cultural Programming. Voice

  10. Television Viewing, Walking Speed and Grip Strength in a Prospective Cohort Study

    E-Print Network [OSTI]

    Keevil, Victoria L.; Wijndaele, Katrien; Luben, Robert; Sayer, Avan A.; Wareham, Nicholas J.; Khaw, Kay-Tee

    2014-07-18T23:59:59.000Z

    , strong and consistent associations between grip strength and TV viewing time were not observed. Isometric muscle strength encapsulates only one aspect of muscle func- tion, and low performance may be present without low strength or vice versa, a concept... for age, physical activity, anthropome- try, wealth, comorbidity, smoking, and alcohol intake and combined if no sex–TV viewing time interactions were identified. Results: Men and women who watched the least TV at the 2HC or 3HC walked at a faster usual...

  11. A new approach to teaching factory layout using closed-circuit television

    E-Print Network [OSTI]

    Britain, Jack Chancellor

    1968-01-01T23:59:59.000Z

    HNT ~ III. D. Vl&OP". "!'. NT 0! TH'": SYST'i:N ~ ~ ~ c ~ I'V. USING Tll"-' S1ST":N IN FACTOH': LAYOUT Vc BY-PPOBUCTS C!F TH"' S5'STHlf c 31 ~ ~ ~ ~ ~ 38 VI. CONC1USION ~ ~ BIBB IOGHAPHY ~ ~ ~ ~ ~ ~ c ~ ~ c ~ 45 LIST OF' TABLES 1. Table of lnit...!rpcse closed-eirou! t television system arit} deter! in" hai; it ocu5. d b;. st be u:ed 1n 113. usi rating factory leycut prit!ciples;5 th tiic limited funds available This CCT!& system was to h"ive three tit?in oh!master} s? tice. The fi&rst c f t lie se...

  12. TV Energy Consumption Trends and Energy-Efficiency Improvement Options

    E-Print Network [OSTI]

    Park, Won Young

    2011-01-01T23:59:59.000Z

    Energy Efficiency of New Televisions”. October. http://mappingandbenchmarking.iea-4e.org/shared_files/110/download 2010b Australia

  13. A Battery-Less, Energy Harvesting Device for Long Range Scavenging of Wireless Power from Terrestrial TV Broadcasts

    E-Print Network [OSTI]

    Tentzeris, Manos

    (COFDM or OFDM) modulation, which allows for transmission of a much more enhanced picture quality without lower than Analog, its broadcasting towers can be found at regular geographic intervals in most urban ANALOG AND DIGITAL TV SIGNALS In order to maximize coverage and range, TV and Radio broadcast towers

  14. A Review of the 2011 and 2013 Digital Television Energy Efficiency Regulations Developed and Adopted by the California Energy Commission

    E-Print Network [OSTI]

    Wazzan, C. Paul; Eash, Dawn E.

    2011-01-01T23:59:59.000Z

    1, 2008. “TV Energy Consumption Trends and Energy-EfficiencyElectronics: Market Trends, Energy Consumption, and Program

  15. Development of preference models for regular dissemination of informational and educational programming through cable television systems of Texas

    E-Print Network [OSTI]

    Quinn, Larry Arnold

    1973-01-01T23:59:59.000Z

    of formats on the market today. Different manufacturers' equipment is not compatible, and often even equipment manufactured by the same company is not always compatible (9: I). Results of this study will reveal to the Texas cable industry the kinds...DEVELOPMENT OF PREFERENCE MODELS FOR REGULAR DISSEMINATION OF INFORMATIONAL AND EDUCATIONAL PROGRAMMING THROUGH CABLE TELEVISION SYSTEMS OF TEXAS A Thesis by LARRY ARNOLD QUINN Submitted to the Graduate College of Texas A&M University...

  16. This information describes typical occupations and employment settings associated with this major. Understand that some of these options may require additional training. Moreover, you are not limited to these options when choosing a possible career path.

    E-Print Network [OSTI]

    Arnold, Jonathan

    and the impact of that content on society. Graduates find careers in the film, television, radio, cable Assistant Program Manager Project Manager Promotion Writer/Producer Public Relations Specialist Radio Graduation Survey at www.career.uga.edu/gradsurveyresults/ and search for alumni on Linked In at www

  17. TV Weathercasters as Climate Change Communicators

    E-Print Network [OSTI]

    TV Weathercasters as Climate Change Communicators Kris Wilson Ph.D. School of Journalism University. 2012) #12;TV Weathercasters as Climate Change Communicators On-line survey (n=571) (52% response rate change more frequently in the future #12;TV Weathercasters as Climate Change Communicators "As a TV

  18. Robert Heinecken's TV/Time Environment

    E-Print Network [OSTI]

    Pfahler, Zachary Austin

    2012-01-01T23:59:59.000Z

    Environment, for example, exploits the televisual medium inMedium is the Message:” The Aesthetics of TV/Time Environmentwith TV/Time Environment. 11 “The Medium is the Message:”

  19. Product line-up design based on preference measurement : a case study on TV industry

    E-Print Network [OSTI]

    Park, Chang Bae, S.M. Massachusetts Institute of Technology

    2011-01-01T23:59:59.000Z

    Sony, in 2010, introduced innovative product line-up setting process for its TV, using the technique of market segmentation and conjoint analysis. This practice was expected to increase its sales compared to traditional ...

  20. UNIVERSITY OF MASSACHUSETTS AMHERST CAMERA USE The purpose of this policy is to regulate the use of closed circuit television (CCTV) cameras to monitor and record

    E-Print Network [OSTI]

    Massachusetts at Amherst, University of

    UNIVERSITY OF MASSACHUSETTS AMHERST CAMERA USE POLICY I. Purpose The purpose of this policy is to regulate the use of closed circuit television (CCTV) cameras to monitor and record public areas of Massachusetts Amherst is committed to enhancing the quality of life of the campus community by integrating

  1. TV Energy Consumption Trends and Energy-Efficiency Improvement Options

    E-Print Network [OSTI]

    Park, Won Young

    2011-01-01T23:59:59.000Z

    LBNL-pend TV Energy Consumption Trends and Energy-EfficiencyTrends and Energy Consumption ..TV Technology Trends and Energy Consumption. 1.2.3. Factors

  2. The development of an exemplary plan of social action for the implementation and maintenance of educational television in institutions of higher learning in the United States

    E-Print Network [OSTI]

    Godwin, Norman Floyd

    1969-01-01T23:59:59.000Z

    to designate particular means or methods by which strategies may be achieved. Educational ~chan e - Educational change shall refer to a partial or whole alteration in the pattern of an on-going educational system. Educational television - Educational... is that educational institutions, since they are charged with imparting both old and new knowledge to the young, must themselves be highly dynamic, with frequent changes in teaching methods as well as content. Further- more, the assumption is that teachers...

  3. Real time, TV-based, point-image quantizer and sorter

    DOE Patents [OSTI]

    Case, Arthur L. (Oak Ridge, TN); Davidson, Jackson B. (Oak Ridge, TN)

    1976-01-01T23:59:59.000Z

    A device is provided for improving the vertical resolution in a television-based, two-dimensional readout for radiation detection systems such as are used to determine the location of light or nuclear radiation impinging a target area viewed by a television camera, where it is desired to store the data indicative of the centroid location of such images. In the example embodiment, impinging nuclear radiation detected in the form of a scintillation occurring in a crystal is stored as a charge image on a television camera tube target. The target is scanned in a raster and the image position is stored according to a corresponding vertical scan number and horizontal position number along the scan. To determine the centroid location of an image that may overlap a number of horizontal scan lines along the vertical axis of the raster, digital logic circuits are provided with at least four series-connected shift registers, each having 512 bit positions according to a selected 512 horizontal increment of resolutions along a scan line. The registers are shifted by clock pulses at a rate of 512 pulses per scan line. When an image or portion thereof is detected along a scan, its horizontal center location is determined and the present front bit is set in the first shift register and shifted through the registers one at a time for each horizontal scan. Each register is compared bit-by-bit with the preceding register to detect coincident set bit positions until the last scan line detecting a portion of the image is determined. Depending on the number of shift registers through which the first detection of the image is shifted, circuitry is provided to store the vertical center position of the event according to the number of shift registers through which the first detection of the event is shifted. Interpolation circuitry is provided to determine if the event centroid is between adjacent scan lines and stored in a vertical address accordingly. The horizontal location of the event is stored in a separate address memory.

  4. 6. Electric current is delivered to a television set at a specified voltage. The power delivered to the television is the energy per charge (voltage) multiplied by the charge per time (current) as

    E-Print Network [OSTI]

    Kioussis, Nicholas

    .1 10 m 4 4 2.1 A 6.9 m L L D V V IR I I A I LD - - × = = = = = = × 29. An electric heater - - = - - = - - = 3. (b) Now apply Ohm's Law to 1R to find 1I : 1 12.0 V 0.55 A 22 I= = 4. Repeat step 3 to find 2I : 2 12.0 V 0.18 A 67 I= = 5. Repeat step 3 to find 3I : 3 12.0 V 0.16 A 77 I= = 6. (c) Since 1 ,R I

  5. AUTOMATIC TV LOGO DETECTION AND CLASSIFICATION IN BROADCAST VIDEOS

    E-Print Network [OSTI]

    AUTOMATIC TV LOGO DETECTION AND CLASSIFICATION IN BROADCAST VIDEOS Nedret ¨OZAY, B¨ulent SANKUR In this study1 , we present a fully automatic TV logo iden- tification system. TV logos are detected in static of a logo candidate is established, TV logos are recognized via their subspace fea- tures. Comparative

  6. Authenticating Primary Users' Signals in Cognitive Radio Networks via Integrated Cryptographic and Wireless Link Signatures

    E-Print Network [OSTI]

    Ning, Peng

    any harmful interference to the primary user [17]. For example, in IEEE 802.22 WRANs, TV transmission towers are primary users, and radio devices that use TV channels for communication are secondary users should not use those channels to avoid interfering with the transmission of the primary user. Existing m

  7. U.S. Energy Department, Pay-Television Industry and Energy Efficiency

    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 AskedEnergyIssuesEnergyTransportation& ForumVersion:3Groups Announce Set-Top

  8. Captive Radio

    E-Print Network [OSTI]

    Rosenfeld, Lauren

    2012-01-01T23:59:59.000Z

    Captive Radio (working title) – Fine Cut Transcript,TRT: 23:20 Jungle aerials RADIO VOICE, It is 5:21 in theas the day breaks on Caracol Radio’s program, The Voices of

  9. Special Issue: "Thinking beyond the Box: Designing Interactive TV across Different Devices"

    E-Print Network [OSTI]

    provides new opportunities for using home-related services including online gaming, visualization of energy" Behavior & Information Technology (BIT) Guest Editors: Jan Hess, Hendrik Knoche, Volker Wulf Nowadays consumption, home security or support for healthy living. The TV set is thus becoming a high-tech platform

  10. Feeling the Heat... From My TV Set | 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 Chinaof EnergyImpactOnSTATEMENT OF DAVIDTheJune 6, 2012.Department of

  11. Measurement of induced fractures by downhole TV camera in Black Warrior Basin coalbeds

    SciTech Connect (OSTI)

    Palmer, I.D. (Amoco Production Co., Tulsa, OK (US)); Sparks, P. (Taurus Exploration Inc., Birmingham, AL (US))

    1991-03-01T23:59:59.000Z

    Fracture stimulation is commonly used for coal degasification at the Black Warrior basin in Alabama. To understand coalbed fracturing better, Well AM-1 in the Oak Grove field was completed openhole in the section bracketing the Black Creek coals. Special diagnostics used on this project included various injection tests, static-line pressure measurements, and a downhole television camera. The television camera observed fractures during injection tests and after the propped fracture treatment. The authors believe these are the first successful downhole television pictures of propped fractures in coalbeds. Results are compared with predictions of hydraulic fracture simulators. This is a way of calibrating hydraulic fracture models for improved design/optimization.

  12. TV Energy Consumption Trends and Energy-Efficiency Improvement Options

    E-Print Network [OSTI]

    Park, Won Young

    2011-01-01T23:59:59.000Z

    TV Wikipedia. 2011b. Luminance, Luminous flux, Luminousen.wikipedia.org/wiki/Luminance http://en.wikipedia.org/Luminance

  13. TV Energy Consumption Trends and Energy-Efficiency Improvement Options

    E-Print Network [OSTI]

    Park, Won Young

    2011-01-01T23:59:59.000Z

    China Estimates of global and country-specific energy saving potentials will be based on the above TV market forecast

  14. TV Energy Consumption Trends and Energy-Efficiency Improvement Options

    E-Print Network [OSTI]

    Park, Won Young

    2011-01-01T23:59:59.000Z

    and Low Power Mode Energy Consumption”, Energy Efficiency inEnergy Consumption ..26 3.1.3. 3D TV Energy Consumption and Efficiency

  15. Measuring the Engagement Level of TV Viewers Abstract--This work studies the feasibility of using visual

    E-Print Network [OSTI]

    program and manually coded the engagement levels of each viewer. From each video, we extracted several programs with an RGB video camera mounted on the TV set. Then, we extracted several face and head features features characterizing facial and head gestures, and used several aggregation methods over a short time

  16. Image display device in digital TV

    DOE Patents [OSTI]

    Choi, Seung Jong (Seoul, KR)

    2006-07-18T23:59:59.000Z

    Disclosed is an image display device in a digital TV that is capable of carrying out the conversion into various kinds of resolution by using single bit map data in the digital TV. The image display device includes: a data processing part for executing bit map conversion, compression, restoration and format-conversion for text data; a memory for storing the bit map data obtained according to the bit map conversion and compression in the data processing part and image data inputted from an arbitrary receiving part, the receiving part receiving one of digital image data and analog image data; an image outputting part for reading the image data from the memory; and a display processing part for mixing the image data read from the image outputting part and the bit map data converted in format from the a data processing part. Therefore, the image display device according to the present invention can convert text data in such a manner as to correspond with various resolution, carry out the compression for bit map data, thereby reducing the memory space, and support text data of an HTML format, thereby providing the image with the text data of various shapes.

  17. Assistant Secretary Hoffman Discusses Grid Modernization with the New York Times and E&E TV

    Broader source: Energy.gov [DOE]

    During a New York Times conference on “Energy for Tomorrow: Building Sustainable Cities,” Assistant Secretary Hoffman joined ConEd CEO Kevin Burke, and Euroheat and Power CEO Sabine Froning for a discussion on “Think National but Power Local.” During an interview with E&E TV’s Monica Trauzzi, she discussed how Recovery Act funding is helping utilities achieve important results such as reducing peak load, deferring building of additional generation, improving operations and monitoring the health of the grid more effectively.

  18. A new communication paradigm for mobile TV over cellular network Dr. Hongxiang Li

    E-Print Network [OSTI]

    A new communication paradigm for mobile TV over cellular network Dr. Hongxiang Li Electrical terrestrial TV network and propose a new mobile TV communication paradigm that is radically different from and communication theory (i.e., Network Coding and Dirty Paper Coding) in the new mobile TV system design. Despite

  19. Training Room Equipment Instructions Projector and TV Display

    E-Print Network [OSTI]

    Crawford, T. Daniel

    Training Room Equipment Instructions Projector and TV Display The control panel on the wall are connected to a training room computer and room is equipped with a keyboard, mouse and clicker. Connect USB

  20. Technical support document: Energy efficiency standards for consumer products: Room air conditioners, water heaters, direct heating equipment, mobile home furnaces, kitchen ranges and ovens, pool heaters, fluorescent lamp ballasts and television sets. Volume 2, Fluorescent lamp ballasts, television sets, room air conditioners, and kitchen ranges and ovens

    SciTech Connect (OSTI)

    Not Available

    1993-11-01T23:59:59.000Z

    This document is divided into ``volumes`` B through E, dealing with individual classes of consumer products. Chapters in each present engineering analysis, base case forecasts, projected national impacts of standards, life-cycle costs and payback periods, impacts on manufacturers, impacts of standards on electric utilities, and environmental effects. Supporting appendices are included.

  1. Radio Pulsars

    E-Print Network [OSTI]

    Beskin, V S; Gwinn, C R; Tchekhovskoy, A

    2015-01-01T23:59:59.000Z

    Almost 50 years after radio pulsars were discovered in 1967, our understanding of these objects remains incomplete. On the one hand, within a few years it became clear that neutron star rotation gives rise to the extremely stable sequence of radio pulses, that the kinetic energy of rotation provides the reservoir of energy, and that electromagnetic fields are the braking mechanism. On the other hand, no consensus regarding the mechanism of coherent radio emission or the conversion of electromagnetic energy to particle energy yet exists. In this review, we report on three aspects of pulsar structure that have seen recent progress: the self-consistent theory of the magnetosphere of an oblique magnetic rotator; the location, geometry, and optics of radio emission; and evolution of the angle between spin and magnetic axes. These allow us to take the next step in understanding the physical nature of the pulsar activity.

  2. Radio bursts from superconducting strings

    E-Print Network [OSTI]

    Yi-Fu Cai; Eray Sabancilar; Tanmay Vachaspati

    2012-01-30T23:59:59.000Z

    We show that radio bursts from cusps on superconducting strings are linearly polarized, thus, providing a signature that can be used to distinguish them from astrophysical sources. We write the event rate of string-generated radio transients in terms of observational variables, namely, the event duration and flux. Assuming a canonical set of observational parameters, we find that the burst event rate can be quite reasonable, e.g., order ten a year for Grand Unified strings with 100 TeV currents, and a lack of observed radio bursts can potentially place strong constraints on particle physics models.

  3. Radio Broadcasts from Superconducting Strings

    E-Print Network [OSTI]

    Yi-Fu Cai; Eray Sabancilar; Daniele A. Steer; Tanmay Vachaspati

    2012-05-14T23:59:59.000Z

    Superconducting cosmic strings can give transient electromagnetic signatures that we argue are most evident at radio frequencies. We investigate the three different kinds of radio bursts from cusps, kinks, and kink-kink collisions on superconducting strings. We find that the event rate is dominated by kink bursts in a range of parameters that are of observational interest, and can be quite high (several a day at 1 Jy flux) for a canonical set of parameters. In the absence of events, the search for radio transients can place stringent constraints on superconducting cosmic strings.

  4. file://C:\\Documents and Settings\\MHerren\\Desktop\\DOE IMC Web...

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

    Conference 2012 432012 file:C:Documents and SettingsMHerrenDesktopDOE IMC Web Agenda 43.htm Last Updated: 432012 Wednesday - Radio and Spectrum Technology Radio...

  5. Price and Inventory Competition in Oligopoly TV White Space Markets

    E-Print Network [OSTI]

    Huang, Jianwei

    's wholesale pricing strategy on the market equilibrium. Specifically, we analytically show how the wholesale further propose two different spectrum wholesale pricing strategies that maximize the database manager between these two wholesale pricing strategies. Index Terms--TV White Space, Price and Inventory

  6. Weber's Law and Weberized TV Restoration Jianhong Shen

    E-Print Network [OSTI]

    Soatto, Stefano

    Weber's Law and Weberized TV Restoration Jianhong Shen School of Mathematics University the influence of human vi­ sion psychology. Weber's Law in psychology and psychophysics claims that hu­ man [Physica D, 60:259­268, 1992]. We study the issues of existence and uniqueness for the pro­ posed Weberized

  7. PREDICTION STRATEGIES IN A TV RECOMMENDER SYSTEM METHOD AND EXPERIMENTS

    E-Print Network [OSTI]

    Nijholt, Anton

    203 PREDICTION STRATEGIES IN A TV RECOMMENDER SYSTEM ­ METHOD AND EXPERIMENTS Mark van Setten, Enschede, The Netherlands anijholt@cs.utwente.nl, bvdijk@cs.utwente.nl ABSTRACT Predicting the interests present a way to create prediction engines that allow prediction techniques to be easily combined

  8. Digital Video, Digital TV IMPA -Instituto de Matemtica Pura e

    E-Print Network [OSTI]

    1 Digital Video, Digital TV and Beyond Luiz Velho IMPA - Instituto de Matemática Pura e Aplicada 2 Outline Video in the Digital Age Deployment of Digital Video Enabling Technologies Research @ VISGRAF Laboratory Trends and the Future... 3 Evolution of Digital Video 1st Generation - Analog / Digital Conversion

  9. Telecommunications Radio Lease

    E-Print Network [OSTI]

    Telecommunications Radio Lease 1. Fax completed form to 979.847.1111. 2. If you do not receive. Note: There is an air time charge for the use of the radios. Radio lease rates depend on the radio type to any of the radios, chargers and accessories until signed back over to the Telecommunications office

  10. CATEGORY 15 Media: includes webinars, podcasts, DVDs, videos, press releases, radio, TV, newsletter articles) (29 records)

    E-Print Network [OSTI]

    , newsletter articles) (29 records) Record ID 4010244 Title: Coverage in the Times (front page of the Business Section), 4 June 2013 Other titles: The sustainable management of Britain's forest and woodland areas Commission Company: Forest Research Imprint: 2013 Description: page 37 Main subject: SUSTAINABLE MANAGEMENT

  11. 518 NATURE PHYSICS | VOL 7 | JULY 2011 | www.nature.com/naturephysics books & arts

    E-Print Network [OSTI]

    Loss, Daniel

    television and radio? (Or, likewise, why television and radio have not killed theatre and live concerts -- a graphic that could have been lifted straight from a contemporaneous scientific periodical (indeed

  12. Modulate Internet Radio Into FM Using GNU Radio

    E-Print Network [OSTI]

    Yu, Chansu

    1 Modulate Internet Radio Into FM Using GNU Radio By: Elie Salameh Outline. · Fm in gnu radio · Audio Streams in Internet Radio · Gnu & Audio Files · Sox command · Playlist ".pls" · Recording internet radio #12;2 Project description · Using gnu radio to modulate internet radio into fm. · Using usrp

  13. Telecommunications Radio Rental

    E-Print Network [OSTI]

    Telecommunications Radio Rental 1. Fax completed form to 979.847.1111. 2. If you do not receive://telecom.tamu.edu/Accounts/Rate_Information.php). There is an air time charge for the use of the radios. Rental radios will be pro-rated per radio per daily usage of the radios, chargers and accessories until signed back over to the Telecommunications office. Amount

  14. Radio frequency detection assembly and method for detecting radio frequencies

    DOE Patents [OSTI]

    Cown, Steven H. (Rigby, ID); Derr, Kurt Warren (Idaho Falls, ID)

    2010-03-16T23:59:59.000Z

    A radio frequency detection assembly is described and which includes a radio frequency detector which detects a radio frequency emission produced by a radio frequency emitter from a given location which is remote relative to the radio frequency detector; a location assembly electrically coupled with the radio frequency detector and which is operable to estimate the location of the radio frequency emitter from the radio frequency emission which has been received; and a radio frequency transmitter electrically coupled with the radio frequency detector and the location assembly, and which transmits a radio frequency signal which reports the presence of the radio frequency emitter.

  15. Security camera resolution measurements: Horizontal TV lines versus modulation transfer function measurements.

    SciTech Connect (OSTI)

    Birch, Gabriel Carisle; Griffin, John Clark

    2015-01-01T23:59:59.000Z

    The horizontal television lines (HTVL) metric has been the primary quantity used by division 6000 related to camera resolution for high consequence security systems. This document shows HTVL measurements are fundamen- tally insufficient as a metric to determine camera resolution, and propose a quantitative, standards based methodology by measuring the camera system modulation transfer function (MTF), the most common and accepted metric of res- olution in the optical science community. Because HTVL calculations are easily misinterpreted or poorly defined, we present several scenarios in which HTVL is frequently reported, and discuss their problems. The MTF metric is discussed, and scenarios are presented with calculations showing the application of such a metric.

  16. How Much Energy does Your TV Set Use? | 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 ChinaofSchaefer To:Department ofOral Testimony of Secretary SamuelAs you mayDepartmentThis

  17. People love watching TV and going to the movies. This is great news for multimedia

    E-Print Network [OSTI]

    Zimmerman, John

    People love watching TV and going to the movies. This is great news for multimedia researchers that rarely gets addressed in the research is, Why do people love to consume TV programs and movies? Current, which lift them out of their ordinary exis- tence. Viewers develop strong attachments

  18. Energy Efficient Radio Resource

    E-Print Network [OSTI]

    Yanikomeroglu, Halim

    Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System Omer HALILOGLU Introduction System Model Performance Evaluation Conclusion References Energy Efficient Hacettepe University 5 September 2014 Omer HALILOGLU (Hacettepe University) Energy Efficient Radio Resource

  19. On the Radio and Optical Luminosity Evolution of Quasars

    SciTech Connect (OSTI)

    Singal, J.; /KIPAC, Menlo Park /SLAC; Petrosian, V.; /KIPAC, Menlo Park /SLAC /Stanford U., Phys. Dept. /Stanford U., Appl. Phys. Dept.; Lawrence, A.; /Edinburgh U., Inst. Astron.; Stawarz, L.; /JAXA, Sagamihara /Jagiellonian U., Astron. Observ.

    2011-05-20T23:59:59.000Z

    We calculate simultaneously the radio and optical luminosity evolutions of quasars, and the distribution in radio loudness R defined as the ratio of radio and optical luminosities, using a flux limited data set containing 636 quasars with radio and optical fluxes from White et al. We first note that when dealing with multivariate data it is imperative to first determine the true correlations among the variables, not those introduced by the observational selection effects, before obtaining the individual distributions of the variables. We use the methods developed by Efron and Petrosian which are designed to obtain unbiased correlations, distributions, and evolution with redshift from a data set truncated due to observational biases. It is found that as expected the population of quasars exhibits strong positive correlation between the radio and optical luminosities and that this correlation deviates from a simple linear relation in a way indicating that more luminous quasars are more radio loud. We also find that there is a strong luminosity evolution with redshift in both wavebands, with significantly higher radio than optical evolution. We conclude that the luminosity evolution obtained by arbitrarily separating the sources into radio loud (R > 10) and radio quiet (R < 10) populations introduces significant biases that skew the result considerably. We also construct the local radio and optical luminosity functions and the density evolution. Finally, we consider the distribution of the radio loudness parameter R obtained from careful treatment of the selection effects and luminosity evolutions with that obtained from the raw data without such considerations. We find a significant difference between the two distributions and no clear sign of bi-modality in the true distribution. Our results indicate therefore, somewhat surprisingly, that there is no critical switch in the efficiency of the production of disk outflows/jets between very radio quiet and very radio loud quasars, but rather a smooth transition. Also, this efficiency seems higher for the high-redshift and more luminous sources in the considered sample.

  20. Fusion of speech, faces and text for person identification in TV broadcast

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    person names are tagged with the normalized identity (e.g. Barack OBAMA). People whose identity cannot be.1 Corpus The 2012 Repere corpus contains a total of 6 hours of annotated videos recorded from 2 French TV

  1. presents... CJSF Radio, SFU's Campus and Community radio

    E-Print Network [OSTI]

    presents... CJSF Radio, SFU's Campus and Community radio station is offering their Radio Kids Camp once again this year, for kids aged 8-12! CJSF 90.1fm is a radio station which promotes local around Storytelling. With radio as a way to express their voice, campers will learn innovative skills

  2. NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia Electronics Division Internal Report an opposition battery, a DC Null Voltmeter and a recorder. With this set-up a variation in temperature of .02 °C

  3. On Black Hole Masses and Radio Loudness in AGN

    E-Print Network [OSTI]

    Ari Laor

    2000-09-13T23:59:59.000Z

    The distribution of radio to optical fluxes in AGN is bimodal. The physical origin for this bimodality is not understood. In this Letter I describe observational evidence, based on the Boroson & Green PG quasar sample, that the radio loudness bimodality is strongly related to the black hole mass (M_BH). Nearly all PG quasars with M_BH>10^9M_sun are radio loud, while quasars with M_BH<3x10^8M_sun are practically all radio quiet. This result is consistent with the dependence of quasar host galaxy morphology on radio loudness. There is no simple physical explanation for this result, but it may provide a clue on how jets are formed near massive black holes. The radio loudness--black hole mass relationship suggests that the properties of various types of AGN may be largely set by three basic parameters, M_BH, L/L_Eddington, and inclination angle.

  4. TACTICAL RADIO OPERATIONS August 2009

    E-Print Network [OSTI]

    US Army Corps of Engineers

    FM 6-02.53 TACTICAL RADIO OPERATIONS August 2009 DISTRIBUTION RESTRICTION. Approved for public August 2009 TACTICAL RADIO OPERATIONS Contents Page PREFACE ...........................................................................................................viii Chapter 1 APPLICATIONS FOR TACTICAL RADIO DEPLOYMENT.............................. 1-1 Modularity

  5. Stabilized radio frequency quadrupole

    DOE Patents [OSTI]

    Lancaster, Henry D. (Orinda, CA); Fugitt, Jock A. (Berkeley, CA); Howard, Donald R. (Danville, CA)

    1984-01-01T23:59:59.000Z

    A long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator.

  6. Lion Television films at Oak Ridge

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

    an interesting e-mail came to me from ORNL's Public Relations office. The e-mail had a patent application drawing attached and asked if I knew anything about the apparatus being...

  7. Reservation Emergency Public Information Local Television News

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

    Tennessee Technology Park Heritage Center, the shelter you evacuate to may vary. The grid below the map to the left highlights which shelter to report to based on the...

  8. Rhythms and plasticity: television temporality at home

    E-Print Network [OSTI]

    Irani, Lilly; Jeffries, Robin; Knight, Andrea

    2010-01-01T23:59:59.000Z

    switch off. In: Inside the smart home, pp 115–126 33. Taylorin domestic routine. In: Inside the smart home, pp 183–206

  9. Techniques and Technology Article Optimizing Radio Retention and Minimizing Radio

    E-Print Network [OSTI]

    Sandercock, Brett K.

    Techniques and Technology Article Optimizing Radio Retention and Minimizing Radio Impacts the duration of transmitter attachment and minimizing the impacts of radios on the behavior and demography of the study animal. We tested 4 methods of radio attachment for a breeding population of upland sandpipers

  10. Satellite Radio: Its Global Impact

    E-Print Network [OSTI]

    Udgaonkar, Jayant B.

    Satellite Radio: Its Global Impact TIFR Alumni Lecture By S.Rangarajan #12;1 A wonder called RADIO "No wonder so many physicists started as radio tinkers, and no wonder, before physicist became on Richard Feynmann We will stick to the definition of Radio as · Wireless Audio Delivery ·Listener cannot

  11. TREBALL DE FI DE CARRERA TTOL DEL TFC: Desenvolupament d'una aplicaci HbbTV per a

    E-Print Network [OSTI]

    Yannuzzi Sanchez, Marcelo

    Enginyeria Tècnica de Telecomunicació, especialitat Sistemes de Telecomunicació AUTOR: Àlex Ramonjoan Escobar telecomunicacions. A nivell europeu cal destacar la importància de l'estàndard Hybrid Broadcast Broadband TV around the world. At European level, the relevance of the Hybrid Broadcast Broadband TV standard (better

  12. Cognitive Radio Networks as Sensor Networks

    E-Print Network [OSTI]

    Bandari, Dorna; Yang, Seung R.; Zhao, Yue; Pottie, Gregory

    2007-01-01T23:59:59.000Z

    assuming the cognitive radios know their own coordinates.Networked Sensing Cognitive Radio Networks As SensorIntroduction: Cognitive Radio (CR) Networks The Need For

  13. QoE in Pull Based P2P-TV Systems: Overlay Topology Design Tradeoffs

    E-Print Network [OSTI]

    QoE in Pull Based P2P-TV Systems: Overlay Topology Design Tradeoffs R. Fortuna1, E. Leonardi2, M. Mellia2, M. Meo2, S. Traverso2 1Politecnico di Bari, Italy ­ email: r.fortuna@poliba.it 2Politecnico di

  14. Type Master Thesis Title TV based image processing for manifold-valued data

    E-Print Network [OSTI]

    Grohs, Philipp

    Type Master Thesis Title TV based image processing for manifold-valued data Advisor PROF. PHILIPP of a numerical array of real values (as e.g. in grey-value images) but rather of arrays (matrices) whose elements images, covariance matrices arising in radar observatory data, etc... The challenge is to extend

  15. Backhauling in TV White Spaces Cyrus Gerami, Narayan Mandayam, Larry Greenstein

    E-Print Network [OSTI]

    Mandayam, Narayan

    the overly conservative restrictions on secondary transmissions to protect incumbents. In this paper, instead as well. Using a basic design involving fixed towers and directional antennas, our results show rules for TVBDs (TV Band Devices) by allowing transmission only in certain channels (see Table I

  16. MiTV: Multiple-Implementation Testing of User-Input Validators for Web Applications

    E-Print Network [OSTI]

    Xie, Tao

    MiTV: Multiple-Implementation Testing of User-Input Validators for Web Applications Kunal Taneja1 Nuo Li1 Madhuri R. Marri1 Tao Xie1 Nikolai Tillmann2 1 Department of Computer Science, North Carolina,txie}@ncsu.edu, 2nikolait@microsoft.com ABSTRACT User-input validators play an essential role in guarding a web

  17. Preparing a public database of radio sources

    E-Print Network [OSTI]

    H. Andernach; S. A. Trushkin; A. G. Gubanov; O. V. Verkhodanov; V. B. Titov; A. Micol

    1996-07-22T23:59:59.000Z

    We have collected the largest existing set of radio source lists in machine-readable form: 320 tables with 1.75 million records. Only a minor fraction of these is accessible via public databases. We describe our plans to make this huge amount of heterogeneous data accessible in a homogeneous way via the World Wide Web, with reliable cross-identifications, and searchable by various observables.

  18. eRadio : empowerment through community Web radio

    E-Print Network [OSTI]

    Gomez-Monroy, Carla, 1977-

    2004-01-01T23:59:59.000Z

    The eRadio project proposes to be an effective aid to increase interaction and reduce alienation among the members of dispersed communities by using a holistic approach to participatory and interactive web radio-production, ...

  19. The radio structure of radio-quiet quasars

    E-Print Network [OSTI]

    Christian Leipski; Heino Falcke; Nicola Bennert; Susanne Huettemeister; ;

    2006-06-21T23:59:59.000Z

    We investigate the radio emitting structures of radio-quiet active galactic nuclei with an emphasis on radio-quiet quasars to study their connection to Seyfert galaxies. We present and analyse high-sensitivity VLA radio continuum images of 14 radio-quiet quasars and six Seyfert galaxies. Many of the low redshift radio-quiet quasars show radio structures that can be interpreted as jet-like outflows. However, the detection rate of extended radio structures on arcsecond scales among our sample decreases with increasing redshift and luminosity, most likely due to a lack of resolution. The morphologies of the detected radio emission indicate strong interactions of the jets with the surrounding medium. We also compare the radio data of seven quasars with corresponding HST images of the [OIII] emitting narrow-line region (NLR). We find that the scenario of interaction between the radio jet and the NLR gas is confirmed in two sources by structures in the NLR gas distribution as previously known for Seyfert galaxies. The extended radio structures of radio-quiet quasars at sub-arcsecond resolution are by no means different from that of Seyferts. Among the luminosities studied here, the morphological features found are similar in both types of objects while the overall size of the radio structures increases with luminosity. This supports the picture where radio-quiet quasars are the scaled-up versions of Seyfert galaxies. In addition to known luminosity relations we find a correlation of the NLR size and the radio size shared by quasars and Seyferts.

  20. 208 JOURNAL OF DISPLAY TECHNOLOGY, VOL. 10, NO. 3, MARCH 2014 Polarization-Preserving Light Guide Plate

    E-Print Network [OSTI]

    Wu, Shin-Tson

    to a long battery life. For large screen TVs, Energy Star 6 sets a challenging goal for a 60-inch TV efficiency of an LCD system. For examples, using a more efficient backlight [1], [3], recycling backlight

  1. Some Fundamental Limitations for Cognitive Radio

    E-Print Network [OSTI]

    Sahai, Anant

    ' & $ % Some Fundamental Limitations for Cognitive Radio Anant Sahai Wireless Foundations, UCB EECS program November 1 at BWRC Cognitive Radio Workshop #12;' & $ % Outline 1. Why cognitive radios? 2 November 1 at BWRC Cognitive Radio Workshop #12;' & $ % Apparent spectrum allocations · Traditional

  2. Radio Interferometric Geolocation Miklos Maroti

    E-Print Network [OSTI]

    Maróti, Miklós

    Radio Interferometric Geolocation Mikl´os Mar´oti P´eter V¨olgyesi Sebesty´en D´ora Branislav.kusy, akos.ledeczi}@vanderbilt.edu ABSTRACT We present a novel radio interference based sensor local- ization method for wireless sensor networks. The technique relies on a pair of nodes emitting radio waves

  3. Cognitive Radio: Fundamentals and Opportunities

    E-Print Network [OSTI]

    Morelos-Zaragoza, Robert H.

    Cognitive Radio: Fundamentals and Opportunities Robert H. Morelos-Zaragoza Department of Electrical Engineering San Jose State University October 12, 2007 #12;Cognitive Radio - RHMZ - 2007 Slide 2 of 18 Outline 1. Software-defined radio (SDR) a) Black-box approach b) Components and attributes (Mitola) 2

  4. Language Issues for Cognitive Radio

    E-Print Network [OSTI]

    Kokar, Mieczyslaw M.

    INVITED P A P E R Language Issues for Cognitive Radio Computer languages that may be useful for expressing cognitive radio concepts are identified and evaluated in this tutorial paper. By Mieczyslaw M aspects of formal languages in the context of cognitive radio. A bottom up approach is taken in which

  5. Width of Radio-Loud and Radio-Quiet CMEs

    E-Print Network [OSTI]

    G. Michalek; N. Gopalswamy; H. Xie

    2007-10-24T23:59:59.000Z

    In the present paper we report on the difference in angular sizes between radio-loud and radio-quiet CMEs. For this purpose we compiled these two samples of events using Wind/WAVES and SOHO/LASCO observations obtained during 1996-2005. It is shown that the radio-loud CMEs are almost two times wider than the radio-quiet CMEs (considering expanding parts of CMEs). Furthermore we show that the radio-quiet CMEs have a narrow expanding bright part with a large extended diffusive structure. These results were obtained by measuring the CME widths in three different ways.

  6. Radio Bubbles in Clusters

    E-Print Network [OSTI]

    R. J. H. Dunn; A. C. Fabian; G. B. Taylor

    2005-10-06T23:59:59.000Z

    We extend our earlier work on cluster cores with distinct radio bubbles, adding more active bubbles, i.e. those with Ghz radio emission, to our sample, and also investigating ``ghost bubbles,'' i.e. those without GHz radio emission. We have determined k, which is the ratio of the total particle energy to that of the electrons radiating between 10 MHz and 10 GHz. Constraints on the ages of the active bubbles confirm that the ratio of the energy factor, k, to the volume filling factor, f lies within the range 1 < k/f < 1000. In the assumption that there is pressure equilibrium between the radio-emitting plasma and the surrounding thermal X-ray gas, none of the radio lobes has equipartition between the relativistic particles and the magnetic field. A Monte-Carlo simulation of the data led to the conclusion that there are not enough bubbles present in the current sample to be able to determine the shape of the population. An analysis of the ghost bubbles in our sample showed that on the whole they have higher upper limits on k/f than the active bubbles, especially when compared to those in the same cluster. A study of the Brightest 55 cluster sample shows that 17, possibly 20, clusters required some form of heating as they have a short central cooling time, t_cool < 3 Gyr, and a large central temperature drop, T_centre/T_outer< 1/2. Of these between 12 (70 per cent) and 15 (75 per cent), contain bubbles. This indicates that the duty cycle of bubbles is large in such clusters and that they can play a major role in the heating process.

  7. SPATIAL DATA ON ENERGY, ENVIRONMENTAL, SOCIOECONOMIC, HEALTH AND DEMOGRAPHIC THEMES AT LAWRENCE BERKELEY LABORATORY: 1978 INVENTORY

    E-Print Network [OSTI]

    Burkhart Ed., B.R.

    2012-01-01T23:59:59.000Z

    house heating fuel, water heating fuel, clothes washer and dryer, dishwasher, home freezer, television sets, battery-house heating fuel, water heating fuel, clothes washer and dryer, dishwasher, home freezer, television sets, battery-house heating fuel, water heating fuel, clothes washer and dryer, dishwasher, home freezer, television sets, battery-

  8. Distributed Radio Interferometric Calibration

    E-Print Network [OSTI]

    Yatawatta, Sarod

    2015-01-01T23:59:59.000Z

    Increasing data volumes delivered by a new generation of radio interferometers require computationally efficient and robust calibration algorithms. In this paper, we propose distributed calibration as a way of improving both computational cost as well as robustness in calibration. We exploit the data parallelism across frequency that is inherent in radio astronomical observations that are recorded as multiple channels at different frequencies. Moreover, we also exploit the smoothness of the variation of calibration parameters across frequency. Data parallelism enables us to distribute the computing load across a network of compute agents. Smoothness in frequency enables us reformulate calibration as a consensus optimization problem. With this formulation, we enable flow of information between compute agents calibrating data at different frequencies, without actually passing the data, and thereby improving robustness. We present simulation results to show the feasibility as well as the advantages of distribute...

  9. STANFORD AMATEUR RADIO STATION W6YX PRESS RELEASE June 19, 2008

    E-Print Network [OSTI]

    Straight, Aaron

    Relay League (ARRL, www.arrl.org), the national association for Amateur Radio (a.k.a. "ham radio was designed to test operators' abilities to set up and operate portable stations under emergency conditions, fire, the Red Cross, and other agencies." Field Day is a serious test of skill, but it is also

  10. HelenPilcher,London An avian flu virus is mutating and

    E-Print Network [OSTI]

    Cai, Long

    an unspecified period of time through the auction of radio spectrum that is currently used for television broad that, if elected, he would lift Pre

  11. This description is intended to indicate the kinds of tasks and levels of work that will be required of positions assigned to this classification and shall not be held to exclude other related duties which are not mentioned.

    E-Print Network [OSTI]

    , or assists with routine radio and television programming functions; stocks merchandise or supplies, issues gardening or other landscape duties, lifts and moves equipment and supplies; performs maintenance duties

  12. Fact #872: May 11, 2015 Study Finds More than 60% of Millennials...

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

    All Other Media Sources category includes television, direct mailings, outdoor ads, radio, and magazines. Although the original study did not specify exact definitions, Baby...

  13. MARYLAND HELPS RESIDENTS AND BUSINESSES TO BE SMART | Department...

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

    effort coupled town hall meetings, community fairs, and door-to-door canvassing with social media campaigns and traditional print, radio, and television advertising, such as...

  14. Radio and Collective Identity in the 2006 Oaxacan Uprising

    E-Print Network [OSTI]

    Rogers, Jennifer B.

    2011-01-01T23:59:59.000Z

    4): Buckley, Steve. 2000. “Radio’s New Horizons: DemocracyDiego. 2007. “Community Radio Stations Under Fire. ” InterWhat is Community Radio? A Resource Guide. Johannesburg:

  15. A Formalisation of the Theory of PTSs in Coq Robin Adams

    E-Print Network [OSTI]

    Adams, Robin

    the type TV , to be the set of terms formed using (some of) the objects of type V as free variables: __x_:_V__ __s_:_S_ M_:_TV___N_:_TV_ varx : TV srts : TV appMN : TV A_:_TV___B_:_TV?_ A_:_TV___M_:_TV?_ AB : TV ~AM : TV Here, V

  16. lea esto primero LaserJet 4200

    E-Print Network [OSTI]

    Kleinfeld, David

    to radio or television reception, which can be determined by turning the equipment off and on, the user or an experienced radio/TV technician. Note: Any changes or modifications to the printer that are not expressly lift and move the printer. Prepare the location. Place the printer in a well-ventilated room

  17. Chameleonic Radio Technical Memo No. 3

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Chameleonic Radio Technical Memo No. 3 Implementation Status of the SCA Based FM Radio P. Balister Institute & State University Blacksburg, VA 24061 #12;Implementation Status of the SCA Based FM Radio Philip description of the FM Radio architecture planned for the SCA radio and provides information about the current

  18. Maximizing available spectrum for cognitive radios

    E-Print Network [OSTI]

    Mishra, Shridhar Mubaraq

    2009-01-01T23:59:59.000Z

    Voronoi regions of the transmission towers for TV channelthe KCNS transmission from Sutro tower. Assume channel 40 isprimary transmission if we are beyond that tower’s no-talk

  19. NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA ELECTRONICS DIVISION TECHNICAL NOTE .:41; CLOCK INFORMATION FOR AST 286 COMPUTERS Ronald B. Weimer The battery backed clock is only read (which does not set the battery clock) the AST keeps time from a second crystal oscillator. A rough block

  20. Radio Wave Propagation in Potato Fields John Thelen

    E-Print Network [OSTI]

    Kuzmanov, Georgi

    Radio Wave Propagation in Potato Fields John Thelen Wageningen University Email: John nodes. This paper reports on an extensive set of measurements taken in a potato field, where the foliage of the potato crop is significant. We observed a reduction of 15 dB in signal strength at 15 m between nodes

  1. GNU Radio & USRPGNU Radio & USRP File transfer through WirelessFile transfer through Wireless

    E-Print Network [OSTI]

    Yu, Chansu

    1 GNU Radio & USRPGNU Radio & USRP File transfer through WirelessFile transfer through WirelessSachin Hirve April 30, 2008April 30, 2008 Contents:Contents: What is Software Radio?What is Software Radio? USRPUSRP ­­ MultiMulti--functional hardwarefunctional hardware GNU RadioGNU Radio Previous Work

  2. Radio-nuclide mixture identification using medium energy resolution detectors

    DOE Patents [OSTI]

    Nelson, Karl Einar

    2013-09-17T23:59:59.000Z

    According to one embodiment, a method for identifying radio-nuclides includes receiving spectral data, extracting a feature set from the spectral data comparable to a plurality of templates in a template library, and using a branch and bound method to determine a probable template match based on the feature set and templates in the template library. In another embodiment, a device for identifying unknown radio-nuclides includes a processor, a multi-channel analyzer, and a memory operatively coupled to the processor, the memory having computer readable code stored thereon. The computer readable code is configured, when executed by the processor, to receive spectral data, to extract a feature set from the spectral data comparable to a plurality of templates in a template library, and to use a branch and bound method to determine a probable template match based on the feature set and templates in the template library.

  3. Elements of Radio Waves

    E-Print Network [OSTI]

    Frank G. Borg; Ismo Hakala; Jukka Määttälä

    2007-12-24T23:59:59.000Z

    We present a summary of the basic properties of the radio wave generation, propagation and reception, with a special attention to the gigahertz bandwidth region which is of interest for wireless sensor networks. We also present some measurement results which use the so-called RSSI indicator in order to track how the field strength varies with position and distance of the transceivers. We hope the paper may be useful to anyone who looks for a quick review of the fundamentals of electromagnetic theory with application to antennas.

  4. Short range radio locator system

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01T23:59:59.000Z

    A radio location system comprises a wireless transmitter that outputs two megahertz period bursts of two gigahertz radar carrier signals. A receiver system determines the position of the transmitter by the relative arrival of the radar bursts at several component receivers set up to have a favorable geometry and each one having a known location. One receiver provides a synchronizing gating pulse to itself and all the other receivers to sample the ether for the radar pulse. The rate of the synchronizing gating pulse is slightly offset from the rate of the radar bursts themselves, so that each sample collects one finely-detailed piece of information about the time-of-flight of the radar pulse to each receiver each pulse period. Thousands of sequential pulse periods provide corresponding thousand of pieces of information about the time-of-flight of the radar pulse to each receiver, in expanded, not real time. Therefore the signal processing can be done with relatively low-frequency, inexpensive components. A conventional microcomputer is then used to find the position of the transmitter by geometric triangulation based on the relative time-of-flight information.

  5. Environments of powerful radio galaxies through the cosmic ages

    E-Print Network [OSTI]

    Julie-Ann Goodlet

    2006-02-16T23:59:59.000Z

    I define 3 samples of extragalactic radio sources of type FRII, containing 26 objects in total. The control sample consists of 6C and 7C sources with radio-luminosities of around 10E27 W\\Hz at 151 MHz and z~1. The other samples contain 3CRR sources with either comparable redshifts but radio luminosities about a decade larger or with comparable radio-luminosities but redshifts around z~0.4. These samples are used to investigate the possible evolution of depolarisation and rotation measure properties with redshift and radio luminosity independently. I use the \\citet{kat97} model with 3 flux measurements to estimate the density of the source environment, source age and jet power. Depolarisation and variations in the rotation measure were found to be insensitive to changes in the density of the source environment. This indicates that depolarisation and variations in the rotation measure are not density indicators but map how the disorder in the magnetic field changes with redshift. The model is then used on a larger set of FRII sources taken from the complete 3CRR, 6CE and 7C III samples. I find that the density of the source environment is a strong function of the source radio-luminosity but is insensitive to changes in redshift. The jet power is also a strong function of radio-luminosity but also a weak function of redshift. This indicates that the mass of the black-hole powering FRII sources is epoch dependent. In general, I find that the source environment is dominated by changes in the radio-luminosity but is relatively unaffected by changes in cosmic epoch.

  6. On the origin of radio emission in radio quiet quasars

    E-Print Network [OSTI]

    Ari Laor; Ehud Behar

    2008-08-05T23:59:59.000Z

    The radio emission in radio loud quasars originates in a jet carrying relativistic electrons. In radio quiet quasars (RQQs) the relative radio emission is ~10^3 times weaker, and its origin is not established yet. We show here that there is a strong correlation between the radio luminosity (L_R) and X-ray luminosity (L_X) with L_R~10^-5L_X, for the radio quiet Palomar-Green (PG) quasar sample. The sample is optically selected, with nearly complete radio and X-ray detections, and thus this correlation cannot be due to direct selection biases. The PG quasars lie on an extension of a similar correlation noted by Panessa et al., for a small sample of nearby low luminosity type 1 AGN. A remarkably similar correlation, known as the Guedel-Benz relation, where L_R/L_X~10^-5, holds for coronally active stars. The Guedel-Benz relation, together with correlated stellar X-ray and radio variability, implies that the coronae are magnetically heated. We therefore raise the possibility that AGN coronae are also magnetically heated, and that the radio emission in RQQ also originates in coronal activity. If correct, then RQQ should generally display compact flat cores at a few GHz due to synchrotron self-absorption, while at a few hundred GHz we should be able to see directly the X-ray emitting corona, and relatively rapid and large amplitude variability, correlated with the X-ray variability, is likely to be seen. We also discuss possible evidence that the radio and X-ray emission in ultra luminous X-ray sources and Galactic black holes may be of coronal origin as well.

  7. SECURING RADIO FREQUENCY IDENTIFICATION (RFID)

    E-Print Network [OSTI]

    business process for an organization; as a result, the security risks for RFID systems and the controls for an organization; as a result, the security risks for RFID systems and the controls available to address themMay 2007 SECURING RADIO FREQUENCY IDENTIFICATION (RFID) SYSTEMS SECURING RADIO FREQUENCY

  8. Stabilized radio-frequency quadrupole

    DOE Patents [OSTI]

    Lancaster, H.D.; Fugitt, J.A.; Howard, D.R.

    1982-09-29T23:59:59.000Z

    A long-vane stabilized radio frequency resonator for accelerating charged particles and including means defining a radio frequency resonator cavity, a plurality of long vanes mounted in the defining means for dividing the cavity into sections, and means interconnecting opposing ones of the plurality of vanes for stabilizing the resonator.

  9. Simulated and observed fluxes of sensible and latent heat and CO2 at the WLEF-TV tower using SiB2.5

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Simulated and observed fluxes of sensible and latent heat and CO2 at the WLEF-TV tower using SiB2, Boulder, CO, USA Abstract Three years of meteorological data collected at the WLEF-TV tower were used the WLEF tower, which were not present in the SiB simulation. The model overestimated the magnitude

  10. Spectrum Sensing and Reconstruction for Cognitive Radio

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Spectrum Sensing and Reconstruction for Cognitive Radio Amanpreet S Saini, Zhen Hu, Robert Qiu with spectrum sensing and spectrum reconstruction under the umbrella of cognitive radio which is the smart radio to explore and exploit the free spectrum. Spectrum analyzer is used to emulate cognitive radio to do spectrum

  11. Chameleonic Radio Technical Memo No. 4

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Chameleonic Radio Technical Memo No. 4 A Comparison of Some Existing Radios with Implications 1 2 Methodology 1 3 Findings 2 4 Concluding Remarks 3 A Summary of Radio Specifications 5 B.S. consists of a dis- parate collection of radio technologies operating over a wide range of frequencies

  12. Royal Institute of Technology Cognitive Radio

    E-Print Network [OSTI]

    Maguire Jr., Gerald Q.

    Royal Institute of Technology Cognitive Radio Model-Based Competence for Software Radios Joseph Communication Systems Laboratory Royal Institute of Technology Stockholm, Sweden Cognitive Radio Model-Based Competence for Software Radios Joseph Mitola III August 1999 A thesis submitted to the Royal Institute

  13. Cognitive Radio Technology [from THE GUEST EDITORS

    E-Print Network [OSTI]

    Di Benedetto, Maria-Gabriella

    Cognitive Radio Technology [from THE GUEST EDITORS] Maria Gabriella di Benedetto, Yingbo Hua, Thomas Kaiser, and Xiaodong Wang C ognitive radio is an exciting and new way of thinking and researching of cognitive radio. Perhaps the most pressing of them is improved utilization of the electromagnetic radio

  14. Chameleonic Radio Technical Memo No. 17

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Chameleonic Radio Technical Memo No. 17 The Rise of All-Band All- Mode Radio S.W. Ellingson and S Institute & State University #12;The Rise of All-Band All-Mode Radio Steve Ellingson and S.M. Shajedul Hasan is based on network infrastructure. In this approach, disparate radio networks are integrated through

  15. Radio Astronomy Fundamentals I John Simonetti

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Radio Astronomy Fundamentals I John Simonetti Spring 2012 Radio astronomy provides a very different view of the universe than optical astronomy. Radio astronomers and optical astronomers use different terminology to describe their work. Here I present some basic concepts and terms of radio

  16. Chameleonic Radio Technical Memo No. 1

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Chameleonic Radio Technical Memo No. 1 Prototyping a Software Defined Radio Receiver Based on USRP Defined Radio (SDR) is an emerging technology which supports multi- standard, multi-mode and future proof radio designs. There are several SDR software architectures have been developed during the last few

  17. LOWFREQUENCY RADIO OBSERVATIONS OF XRAY GHOST BUBBLES A2597: A HISTORY RADIO ACTIVITY THE CORE

    E-Print Network [OSTI]

    Sarazin, Craig

    LOW­FREQUENCY RADIO OBSERVATIONS OF X­RAY GHOST BUBBLES A2597: A HISTORY RADIO ACTIVITY THE CORE T showed ``ghost holes'' X­ray emission west northeast central radio galaxy PKS 2322#123. Previous radio observations detect radio emission coming from interior X­ray holes. present low­frequency observations A2597

  18. Radio: Borderless and selective On the use codes in radio broadcast

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Radio: Borderless and selective On the use codes in radio broadcast Jacob Thøgersen The universal radio In the beginning of the 21st century, the Internet may be heralded as the great bringer of free invention, the radio. In Denmark, the earliest experiments with radio broadcasting started as private

  19. Air Shower Measurements with the LOPES Radio Antenna Array

    E-Print Network [OSTI]

    A. Haungs; for the LOPES collaboration

    2008-11-12T23:59:59.000Z

    LOPES is set up at the location of the KASCADE-Grande extensive air shower experiment in Karlsruhe, Germany and aims to measure and investigate radio pulses from Extensive Air Showers. Since radio waves suffer very little attenuation, radio measurements allow the detection of very distant or highly inclined showers. These waves can be recorded day and night, and provide a bolometric measure of the leptonic shower component. LOPES is designed as a digital radio interferometer using high bandwidths and fast data processing and profits from the reconstructed air shower observables of KASCADE-Grande. The LOPES antennas are absolutely amplitude calibrated allowing to reconstruct the electric field strength which can be compared with predictions from detailed Monte Carlo simulations. We report about the analysis of correlations present in the radio signals measured by the LOPES 30 antenna array. Additionally, LOPES operates antennas of a different type (LOPES-STAR) which are optimized for an application at the Pierre Auger Observatory. Status, recent results of the data analysis and further perspectives of LOPES and the possible large scale application of this new detection technique are discussed.

  20. Microwave and Radio Frequency Workshop

    Broader source: Energy.gov [DOE]

    At the Microwave and Radio Frequency Workshop (held in Long Beach, CA, on July 25, 2012), academic and industry experts discussed the existing and emerging electrotechnologies – such as microwave ...

  1. A Variational Approach to the Denoising of Images Based on Different Variants of the TV-Regularization

    SciTech Connect (OSTI)

    Bildhauer, Michael, E-mail: bibi@math.uni-sb.de; Fuchs, Martin, E-mail: fuchs@math.uni-sb.de [Saarland University, Department of Mathematics (Germany)

    2012-12-15T23:59:59.000Z

    We discuss several variants of the TV-regularization model used in image recovery. The proposed alternatives are either of nearly linear growth or even of linear growth, but with some weak ellipticity properties. The main feature of the paper is the investigation of the analytic properties of the corresponding solutions.

  2. T-TV-T^ sr^i Ris-R-597(EN) A ComputerProgram forReliability

    E-Print Network [OSTI]

    T-TV-T^ sr^i Risø-R-597(EN) SIMON A ComputerProgram forReliability and Statistical Analysis using and Statistical Analysis using Monte Carlo Simulation Program Description and Manual Hans ErikKøngsø and Kmt for calculation of reliability and statistical analy- sis. The program is of the Monte Carlo type

  3. Our acclaimed dance troupe, University Dance eatre, attended the American College Dance Festival and Conference hosted by El

    E-Print Network [OSTI]

    Su, Xiao

    we can link your department calendar to the College calendar!) May 3-18: e MFA Lift-O Exhibition Award for Lecturers will be given to: Beverly Mathis-Swanson (Radio,Television, Film, eatre, & Animation Massey (Radio,Television, Film, eatre, & Animation/Illustration). Congratulations to all nominees

  4. Tradeoff between spoofing and jamming a cognitive radio

    E-Print Network [OSTI]

    Peng, Q; Cosman, P C; Milstein, L B

    2009-01-01T23:59:59.000Z

    tradeoff for cognitive radio networks,” IEEE Transactions onemulation attacks in cognitive radio networks,” IEEE Journaldeception for cognitive radio networks,” IEEE Globecom 2009,

  5. RADIO OBSERVATRIO DO ITAPETINGA, ATIBAIA, SP ZONA DE SILNCIO ELTRICO.

    E-Print Network [OSTI]

    RADIO OBSERVATÓRIO DO ITAPETINGA, ATIBAIA, SP ZONA DE SILÊNCIO ELÉTRICO. PROTEÇÃO DO RÁDIO uma Radio Conferência Mundial (World Adminstrative Radio Conference, WARC) patrocinada pela União

  6. A Method for Broadband Full-Duplex MIMO Radio

    E-Print Network [OSTI]

    Hua, Yingbo; Liang, Ping; Ma, Yiming; Cirik, Ali C; Gao, Qian

    2012-01-01T23:59:59.000Z

    canceller for collocated radios,” IEEE Trans. Microwaveusing off-the shelf radios: Feasibility and first results,”Broadband Full-Duplex MIMO Radio Yingbo Hua, Fellow, IEEE,

  7. Small Satellite Applications of Commercial off the Shelf Radio Frequency Integrated Circuits

    E-Print Network [OSTI]

    Graves, John

    2012-02-14T23:59:59.000Z

    from scratch. This opposite extreme requires an extensive set of tools and Radio Frequency (RF) expertise beyond that of most undergraduate 7 engineers. If a program is not careful the resulting cost of test equipment and resources to perform... available from manufacturers today. These chips are compact integrated circuits (IC) that feature combined data interface, RF oscillator, mixing, and amplification circuits. RFIC radio hardware is typically used in cell phone and wireless device...

  8. University of Amsterdam Programming Research Group

    E-Print Network [OSTI]

    Amsterdam, Universiteit van

    as we know. Phase one of the process is based on Relation Partition Algebra (RPA). By lifting systems (like digital set­top boxes and television sets). S

  9. Some Comments related to AGN Radio Loudness

    E-Print Network [OSTI]

    Ari Laor

    2003-12-24T23:59:59.000Z

    The bimodality of the AGN radio loudness distribution, and the relation of radio loudness and black hole mass were recently disputed. A closer look at the existing data suggests possible resolutions of these disputes, as further described below.

  10. Radio Science, Volume ???, Number , Pages 131, Radio tomography of the ionosphere: Analysis

    E-Print Network [OSTI]

    Garcia, Raphaël

    Radio Science, Volume ???, Number , Pages 1­31, Radio tomography of the ionosphere: Analysis AND CRESPON: 4D IONOSPHERE TOMOGRAPHY After analysing the forward and inverse problems of radio tomography, the development of Faraday rotation measurements on-board satellites opens the way to magnetospheric radio

  11. Radio Science, Volume ???, Number , Pages 15, Radio Frequency Interference Mitigation for Detection

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Radio Science, Volume ???, Number , Pages 1­5, Radio Frequency Interference Mitigation for Detection of Extended Sources with an Interferometer Geoffrey C. Bower Radio Astronomy Laboratory, UC Berkeley, Berkeley, CA 94720, USA Radio frequency interference (RFI) is a significant problem for current

  12. Final Project Report Modulate of Internet Radio Into FM Using GNU Radio

    E-Print Network [OSTI]

    Yu, Chansu

    Final Project Report Modulate of Internet Radio Into FM Using GNU Radio Department of Electrical-Introduction: Internet radio (also known as Webcasting) is becoming more and more popular. Especially that it covers for people traveling all the time or living away from there home country, internet radio helps them keep

  13. Cognitive Radio and Smart Grid Dr. Robert C. Qiu

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Cognitive Radio and Smart Grid Dr. Robert C. Qiu Professor Wireless Networking Systems Laboratory RadioCognitive Radio 2 2/23/2010 #12;Outline Cognitive Radio Cognitive Radio @ Tennessee Tech University Spectrum Sensing and Wideband Spectrum Sensing Cognitive Radio Networks and Testbeds Cognitive

  14. Telecommunications Emergency Alert System (EAS) Radio

    E-Print Network [OSTI]

    Telecommunications Emergency Alert System (EAS) Radio 1. Send completed form to Mail Stop of submitting this form, call 979.845.1020. In the event the radio is lost or broken, the department will be charged for a replacement. If the radio malfunctions, please contact Telecommunications. Texas A

  15. FAINT RADIO SOURCES AND STAR FORMATION HISTORY

    E-Print Network [OSTI]

    Waddington, Ian

    FAINT RADIO SOURCES AND STAR FORMATION HISTORY Deborah B. Haarsma 1 , R. Bruce Partridge 1 , Ian 85287­1504 USA Abstract. Faint extragalactic radio sources provide important information about the global history of star formation. Sensitive radio observations of the Hubble Deep Field and other fields

  16. > RADIO TUDIANTE CISM 89,3 FM

    E-Print Network [OSTI]

    Charette, André

    3 0 > RADIO ÉTUDIANTE ­ CISM 89,3 FM Pavillon J.-A.-DeSève 2332, boul. Édouard-Montpetit Local C@pol.umontreal.ca Revue du Département de science politique de l'UdeM. Radio > ATELIERS DE FORMATION EN RADIO (ACTIVITÉS

  17. Analysis of modulation scheme using GNU Radio

    E-Print Network [OSTI]

    Yu, Chansu

    1 Analysis of modulation scheme using GNU Radio By: Zeyu long Outline Introduce Project Goal QPSK CPFSK Resolute Project conclusion Project challenges Reference #12;2 Introduce (1) GNU radio: One of the most popular applications of Software Defined Radios Use C++ to write blocks Use python to connect

  18. Radio Network Planning with Combinatorial Optimisation Algorithms

    E-Print Network [OSTI]

    Boyer, Edmond

    Radio Network Planning with Combinatorial Optimisation Algorithms P. Calégari, F. Guidec, P. Kuonen@c2r.tdf.fr Group: Software tools Abstract: Future UMTS radio planning engineers will face difficult, a software for the optimisation of the radio network is under development. Two mathematical models

  19. Hybrid spread spectrum radio system

    DOE Patents [OSTI]

    Smith, Stephen F. (London, TN) [London, TN; Dress, William B. (Camas, WA) [Camas, WA

    2010-02-09T23:59:59.000Z

    Systems and methods are described for hybrid spread spectrum radio systems. A method, includes receiving a hybrid spread spectrum signal including: fast frequency hopping demodulating and direct sequence demodulating a direct sequence spread spectrum signal, wherein multiple frequency hops occur within a single data-bit time and each bit is represented by chip transmissions at multiple frequencies.

  20. The low-frequency environment of the Murchison Widefield Array: radio-frequency interference analysis and mitigation

    E-Print Network [OSTI]

    Offringa, A R; Hurley-Walker, N; Kaplan, D L; Barry, N; Beardsley, A P; Bell, M E; Bernardi, G; Bowman, J D; Briggs, F; Callingham, J R; Cappallo, R J; Carroll, P; Deshpande, A A; Dillon, J S; Dwarakanath, K S; Ewall-Wice, A; Feng, L; For, B -Q; Gaensler, B M; Greenhill, L J; Hancock, P; Hazelton, B J; Hewitt, J N; Hindson, L; Jacobs, D C; Johnston-Hollitt, M; Kapi?ska, A D; Kim, H -S; Kittiwisit, P; Lenc, E; Line, J; Loeb, A; Lonsdale, C J; McKinley, B; McWhirter, S R; Mitchell, D A; Morales, M F; Morgan, E; Morgan, J; Neben, A R; Oberoi, D; Ord, S M; Paul, S; Pindor, B; Pober, J C; Prabu, T; Procopio, P; Riding, J; Shankar, N Udaya; Sethi, S; Srivani, K S; Staveley-Smith, L; Subrahmanyan, R; Sullivan, I S; Tegmark, M; Thyagarajan, N; Tingay, S J; Trott, C M; Webster, R L; Williams, A; Williams, C L; Wu, C; Wyithe, J S; Zheng, Q

    2015-01-01T23:59:59.000Z

    The Murchison Widefield Array (MWA) is a new low-frequency interferometric radio telescope built in Western Australia at one of the locations of the future Square Kilometre Array (SKA). We describe the automated radio-frequency interference (RFI) detection strategy implemented for the MWA, which is based on the AOFlagger platform, and present 72-231-MHz RFI statistics from 10 observing nights. RFI detection removes 1.1% of the data. RFI from digital TV (DTV) is observed 3% of the time due to occasional ionospheric or atmospheric propagation. After RFI detection and excision, almost all data can be calibrated and imaged without further RFI mitigation efforts, including observations within the FM and DTV bands. The results are compared to a previously published Low-Frequency Array (LOFAR) RFI survey. The remote location of the MWA results in a substantially cleaner RFI environment compared to LOFAR's radio environment, but adequate detection of RFI is still required before data can be analysed. We include speci...

  1. Expense Account "Short List" Acct OMNI Acct Name Account Use Description

    E-Print Network [OSTI]

    Weston, Ken

    advertising agencies as well as broadcast, radio, TV, internet, and print advertising; excludes promotional costing $5K or more ; includes tents, swimming pool and lifting equipment; excludes athletic Audio/visual equipment costing $5K or more ; includes cameras, projectors, camcorders, TVs, etc

  2. Breaking the Attosecond, Angstrom and TV/M Field Barriers with Ultra-Fast Electron Beams

    SciTech Connect (OSTI)

    Rosenzweig, James; Andonian, Gerard; Fukasawa, Atsushi; Hemsing, Erik; Marcus, Gabriel; Marinelli, Agostino; Musumeci, Pietro; O'Shea, Brendan; O'Shea, Finn; Pellegrini, Claudio; Schiller, David; Travish, Gil; /UCLA; Bucksbaum, Philip; Hogan, Mark; Krejcik, Patrick; /SLAC; Ferrario, Massimo; /INFN, Rome; Full, Steven; /Penn State U.; Muggli, Patric; /Southern California U.

    2012-06-22T23:59:59.000Z

    Recent initiatives at UCLA concerning ultra-short, GeV electron beam generation have been aimed at achieving sub-fs pulses capable of driving X-ray free-electron lasers (FELs) in single-spike mode. This use of very low Q beams may allow existing FEL injectors to produce few-100 attosecond pulses, with very high brightness. Towards this end, recent experiments at the LCLS have produced {approx}2 fs, 20 pC electron pulses. We discuss here extensions of this work, in which we seek to exploit the beam brightness in FELs, in tandem with new developments in cryogenic undulator technology, to create compact accelerator-undulator systems that can lase below 0.15 {angstrom}, or be used to permit 1.5 {angstrom} operation at 4.5 GeV. In addition, we are now developing experiments which use the present LCLS fs pulses to excite plasma wakefields exceeding 1 TV/m, permitting a table-top TeV accelerator for frontier high energy physics applications.

  3. High-frame-rate intensified fast optically shuttered TV cameras with selected imaging applications

    SciTech Connect (OSTI)

    Yates, G.J.; King, N.S.P.

    1994-08-01T23:59:59.000Z

    This invited paper focuses on high speed electronic/electro-optic camera development by the Applied Physics Experiments and Imaging Measurements Group (P-15) of Los Alamos National Laboratory`s Physics Division over the last two decades. The evolution of TV and image intensifier sensors and fast readout fast shuttered cameras are discussed. Their use in nuclear, military, and medical imaging applications are presented. Several salient characteristics and anomalies associated with single-pulse and high repetition rate performance of the cameras/sensors are included from earlier studies to emphasize their effects on radiometric accuracy of electronic framing cameras. The Group`s test and evaluation capabilities for characterization of imaging type electro-optic sensors and sensor components including Focal Plane Arrays, gated Image Intensifiers, microchannel plates, and phosphors are discussed. Two new unique facilities, the High Speed Solid State Imager Test Station (HSTS) and the Electron Gun Vacuum Test Chamber (EGTC) arc described. A summary of the Group`s current and developmental camera designs and R&D initiatives are included.

  4. The Nature of Radio-Intermediate Quasars: What is Radio-Loud and what is Radio-Quiet?

    E-Print Network [OSTI]

    Heino Falcke; William Sherwood; Alok Patnaik

    1996-05-27T23:59:59.000Z

    We have performed quasi-simultaneous radio flux density measurements at 2.7 and 10 GHz for all PG quasars with radio flux densities between 4-200 mJy. We find that a large fraction of these sources are variable, flat-spectrum quasars. This brings the total fraction of flat-spectrum quasars with a ratio between radio and optical flux of R>10 - a value previously used to define a radio-loud quasar - to 40% in the PG quasar sample. We also find that the median R-parameter of these flat-spectrum quasars is lower than those of steep-spectrum radio-loud quasars. This contradicts the predictions of the unified scheme and the idea that all flat-spectrum, core-dominated quasars are relativistically boosted lobe-dominated quasars. We show that this discrepancy is due to a population of flat-spectrum radio-intermediate quasars with 25radio-loud quasars nor as normal radio-weak quasars. We point out that a natural explanation for the flat-spectrum radio-intermediate quasars is relativistic boosting in radio-weak quasars. If the flat-spectrum radio-intermediate quasars are considered the boosted counterparts to usual radio-weak quasars, their fraction among radio-weak quasars is roughly 10%, similar to the fraction of boosted radio-loud quasars. This would point towards average Lorentz factors of gamma_jet=2-4 for radio-loud and radio-weak quasars. The presence of the flat-spectrum radio-intermediate quasars changes the definition of 'radio-loud' and can bias some conclusions drawn from optically selected quasar samples, where R ~ 1-10 is used as the dividing line for both, flat- and steep-spectrum quasars. Instead one should use separate R-parameters for the dividing line in steep- (R~25) and flat-spectrum (R~250) quasars.

  5. Cosmological Radio Emission induced by WIMP Dark Matter

    E-Print Network [OSTI]

    N. Fornengo; R. Lineros; M. Regis; M. Taoso

    2012-03-05T23:59:59.000Z

    We present a detailed analysis of the radio synchrotron emission induced by WIMP dark matter annihilations and decays in extragalactic halos. We compute intensity, angular correlation, and source counts and discuss the impact on the expected signals of dark matter clustering, as well as of other astrophysical uncertainties as magnetic fields and spatial diffusion. Bounds on dark matter microscopic properties are then derived, and, depending on the specific set of assumptions, they are competitive with constraints from other indirect dark matter searches. At GHz frequencies, dark matter sources can become a significant fraction of the total number of sources with brightness below the microJansky level. We show that, at this level of fluxes (which are within the reach of the next-generation radio surveys), properties of the faint edge of differential source counts, as well as angular correlation data, can become an important probe for WIMPs.

  6. RADIO CONTROL ADC0 (RSSI)

    E-Print Network [OSTI]

    5 5 4 4 3 3 2 2 1 1 D D C C B B A A RADIO CONTROL PCLK PDATA PALE RADIO DATA SPI_SCK SPI_MOSI SPI_MISO[0..7] PALE RF_DETECT US_OUT_EN SPI_MISO I2C_CLK I2C_DATA US_DETECT AC+ US_OUT SCK RSTN UART_RXD0/SS PB1/SCK PB2/MOSI PB3/MISO PB4/OC0 PB5/OC1A PB6/OC1B PB7/OC1C PC0/A8 PC1/A9 PC2/A10 PC3/A11 PC4/A12

  7. Radio Observations of Supernova Remnants

    E-Print Network [OSTI]

    W. Reich

    2002-08-28T23:59:59.000Z

    Supernovae release an enormous amount of energy into the interstellar medium. Their remnants can observationally be traced up to several ten-thousand years. So far more than 230 Galactic supernova remnants (SNRs) have been identified in the radio range. Detailed studies of the different types of SNRs give insight into the interaction of the blast wave with the interstellar medium. Shock accelerated particles are observed, but also neutron stars left from the supernova explosion make their contribution. X-ray observations in conjunction with radio data constrain models of supernova evolution. A brief review of the origin and evolution of SNRs is given, which are compared with supernova statistics and observational limitations. In addition the morphology and characteristics of the different types of SNRs are described, including some recent results and illustrated by SNRs images mostly obtained with the Effelsberg 100-m telescope.

  8. 2 Aijakko Mitiq: drum-dancing for Australian television

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 SAccession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 2 Length of track 52 minutes Title of track Aijakko Mitiq: drum-dancing for Australian...

  9. Television meets Facebook : social networking through consumer electronics

    E-Print Network [OSTI]

    Baca Del Rosario, Mariana Cristina

    2008-01-01T23:59:59.000Z

    This thesis explores how the merging of ubiquitous consumer electronics and the sociable web improve the user experience of these devices, increase the functionality of both, and help distribute content in a more sociable ...

  10. Assessment of SEAD Global Efficiency Medals for Televisions

    E-Print Network [OSTI]

    Young, Park, Won

    2013-01-01T23:59:59.000Z

    LCD liquid crystal display LED light emitting diode OLEDorganic light emitting diode p progressive scan PC personalwinning models are light emitting diode (LED) backlit liquid

  11. swinburne.edu.au Film andTelevision

    E-Print Network [OSTI]

    Liley, David

    master production skills, develop your scriptwriting talents and begin your career in cinematography Goldner undertook the cinematography. The crew was made up of current and former students. We Keep

  12. Environmental Justice: Made-for-Television-Climate Change: A Global

    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 1,006 492 742 33Frequently20,000 Russian NuclearandJunetrackEllen|July 14, 2014July 7,July2014,Reality |

  13. Digital Television and Media Innovations | Princeton Plasma Physics Lab

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625govInstrumentstdmadapInactiveVisitingContract Management FermiDavidDiesel pricesDiesel28, 2007, 4:15pm to 5:15pm

  14. DOE Publishes Final Rule for Television Test Procedure | Department of

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't Your Destiny: Theof"WaveInteractions and Policy (2009)| Department ofof

  15. The Host Galaxies of Radio-Loud and Radio-Quiet Quasars

    E-Print Network [OSTI]

    James S. Dunlop

    2001-03-15T23:59:59.000Z

    I review our knowledge of the properties of the host galaxies of radio-loud and radio-quiet quasars, both in comparison to each other and in the context of the general galaxy population. It is now clear that the hosts of radio-loud and radio-quiet quasars with M_V 10^9 solar masses appears to be a necessary (although perhaps not sufficient) condition for the production of radio jets of sufficient power to produce an FRII radio source within a massive galaxy halo.

  16. Sources of the Radio Background Considered

    SciTech Connect (OSTI)

    Singal, J.; /KIPAC, Menlo Park /Stanford U.; Stawarz, L.; /KIPAC, Menlo Park /Stanford U. /Jagiellonian U., Astron. Observ.; Lawrence, A.; /Edinburgh U., Inst. Astron. /KIPAC, Menlo Park /Stanford U.; Petrosian, V.; /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., Appl. Phys. Dept.

    2011-08-22T23:59:59.000Z

    We investigate possible origins of the extragalactic radio background reported by the ARCADE 2 collaboration. The surface brightness of the background is several times higher than that which would result from currently observed radio sources. We consider contributions to the background from diffuse synchrotron emission from clusters and the intergalactic medium, previously unrecognized flux from low surface brightness regions of radio sources, and faint point sources below the flux limit of existing surveys. By examining radio source counts available in the literature, we conclude that most of the radio background is produced by radio point sources that dominate at sub {mu}Jy fluxes. We show that a truly diffuse background produced by elections far from galaxies is ruled out because such energetic electrons would overproduce the observed X-ray/{gamma}-ray background through inverse Compton scattering of the other photon fields. Unrecognized flux from low surface brightness regions of extended radio sources, or moderate flux sources missed entirely by radio source count surveys, cannot explain the bulk of the observed background, but may contribute as much as 10%. We consider both radio supernovae and radio quiet quasars as candidate sources for the background, and show that both fail to produce it at the observed level because of insufficient number of objects and total flux, although radio quiet quasars contribute at the level of at least a few percent. We conclude that the most important population for production of the background is likely ordinary starforming galaxies above redshift 1 characterized by an evolving radio far-infrared correlation, which increases toward the radio loud with redshift.

  17. Electrical utilities relay settings

    SciTech Connect (OSTI)

    HACHE, J.M.

    1999-02-24T23:59:59.000Z

    This document contains the Hanford transmission and distribution system relay settings that are under the control of Electrical Utilities.

  18. Deforming Meyer sets

    E-Print Network [OSTI]

    Jeong-Yup Lee; Robert V. Moody

    2009-10-23T23:59:59.000Z

    A linear deformation of a Meyer set $M$ in $\\RR^d$ is the image of $M$ under a group homomorphism of the group $[M]$ generated by $M$ into $\\RR^d$. We provide a necessary and sufficient condition for such a deformation to be a Meyer set. In the case that the deformation is a Meyer set and the deformation is injective, the deformation is pure point diffractive if the orginal set $M$ is pure point diffractive.

  19. EVN+MERLIN Observations of Radio-Intermediate Quasars: Evidence for Boosted Radio-Weak Quasars

    E-Print Network [OSTI]

    Heino Falcke; Alok Patnaik; William Sherwood

    1996-10-08T23:59:59.000Z

    We present VLBI (EVN+MERLIN) observations of a sample of three low-redshift radio-intermediate PG quasars (RIQ) with flat and variable radio spectrum (III Zw 2, PG 1309+355, PG 2209+184). Their radio-to-optical flux ratio (R) is slightly lower than the average R for steep-spectrum quasars, but their radio spectral properties are those of core-dominated quasars. It was proposed previously that these sources might be relativistically boosted jets in radio-weak quasars. Our VLBI observations now indeed confirm the presence of a high brightness temperature core in all three of these objects --- two of them have lower limits on T_B well in excess of 10^10 Kelvin. Moreover, we find no ``missing-flux'' which means that basically all the flux of these quasars is concentrated in the compact radio core. As the total radio flux is already at the low end for radio-loud quasars, we can place a strong limit on the presence of any extended emission. This limit is consistent with the extended emission in radio-weak quasars, but excludes that the flat-spectrum RIQ reside in typical radio-loud quasars. The observations therefore strongly support the idea that relativistic jets are present in radio-weak quasars and hence that radio-loud and radio-weak quasars have very similar central engines.

  20. Radio-telemetry equipment and applications for carnivores

    E-Print Network [OSTI]

    Schweik, Charles M.

    7 Radio-telemetry equipment and applications for carnivores Mark R. Fuller and Todd K. Fuller Radio goals for this chapter are to provide basic information about radio-telemetry equipment and procedures's (2001) comprehensive book, A manual of wildlife radio tagging for persons who are unfamiliar with radio

  1. Radio frequency overview of the high explosive radio telemetry project

    SciTech Connect (OSTI)

    Bracht, R. [Los Alamos National Lab., NM (United States); Dimsdle, J.; Rich, D.; Smith, F. [AlliedSignal Federal Manufacturing and Technologies, Kansas City, MO (United States)

    1998-12-31T23:59:59.000Z

    High explosive radio telemetry (HERT) is a project that is being developed jointly by Los Alamos National Laboratory and AlliedSignal Federal Manufacturing and Technologies. The ultimate goal is to develop a small, modular telemetry system capable of high-speed detection of explosive events, with an accuracy on the order of 10 nanoseconds. The reliable telemetry of this data, from a high-speed missile trajectory, is a very challenging opportunity. All captured data must be transmitted in less than 20 microseconds of time duration. This requires a high bits/Hertz microwave telemetry modulation code to insure transmission of the data with the limited time interval available.

  2. Catalog of DC Appliances and Power Systems

    E-Print Network [OSTI]

    Garbesi, Karina

    2012-01-01T23:59:59.000Z

    Lighting-Torchiere Electric Other Electric Water HeatersSolar Water Heaters Color Televisions and Set-Top BoxesTorchiere Electric Water Heaters Refrigerators Electric

  3. Technology Evaluation of Programmable Communicating Thermostats with Radio Broadcast Data System Communications

    SciTech Connect (OSTI)

    Herter, Karen; Wayland, Seth

    2008-10-31T23:59:59.000Z

    Programmable Communicating Thermostats are thermostats that can be programmed by the user to respond to signals indicating a grid-level system emergency or pricing event. The California Energy Commission is considering standards that would include a requirement for Programmable Communicating Thermostats in residential and small commercial applications. The current specification for Programmable Communicating Thermostats requires Radio Data System communications to Programmable Communicating Thermostats. This study tested the signal strength and reliability of Radio Data System signals at 40 customer sites within the Sacramento Municipal Utility District, which is serviced by 17 radio stations that already transmit Radio Data System signals. The study also tested the functionality of a commercially available Programmable Communicating Thermostat for compliance with California Energy Commission design standards. Test results demonstrated that Radio Data System is capable of reliably sending price and emergency signals. This study also provides evidence that existing Programmable Communicating Thermostats, on receiving a Radio Data System pricing or event signal, are capable of automatically increasing set points to a customer-determined or utility-determined level, thus providing air-conditioning demand response within seconds or just a few (less than 5) minutes.

  4. Hybrid spread spectrum radio system

    DOE Patents [OSTI]

    Smith, Stephen F. (London, TN); Dress, William B. (Camas, WA)

    2010-02-02T23:59:59.000Z

    Systems and methods are described for hybrid spread spectrum radio systems. A method includes modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control an amplification circuit that provides a gain to the signal. Another method includes: modulating a signal by utilizing a subset of bits from a pseudo-random code generator to control a fast hopping frequency synthesizer; and fast frequency hopping the signal with the fast hopping frequency synthesizer, wherein multiple frequency hops occur within a single data-bit time.

  5. Cognitive Radio Network {swjang, sbahk}@netlab.snu.ac.kr

    E-Print Network [OSTI]

    Bahk, Saewoong

    2010 Cognitive Radio Network , , {swjang, sbahk}@netlab.snu.ac.kr Analysis of Average Opportunities in Cognitive Radio Networks Seowoo Jang, Saewoong Bahk INMC, EECS, Seoul National University Cognitive Radio Network . Primary user

  6. RADIO FREQUENCY PHASE IN THE FEL SECTION OF A TBA

    E-Print Network [OSTI]

    Kuenning, R.W.

    2008-01-01T23:59:59.000Z

    Amplitude Control of the Radio Frequency Wave in the Two-Madison, WI, August 21-27, 1986 RADIO FREQUENCY PHASE IN THEAC03-76SF00098 LBL- 223Pl RADIO FREQUENCY PHASE IN THE FEL

  7. NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA ELECTRONICS DIVISION TECHNICAL NOTE R. Lacasse #12;NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia 140-ft CASSEGRAIN BAa

  8. Microwave (MW) and Radio Frequency (RF) as Enabling Technologies...

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

    Microwave (MW) and Radio Frequency (RF) as Enabling Technologies for Advanced Manufacturing Microwave (MW) and Radio Frequency (RF) as Enabling Technologies for Advanced...

  9. Using Radio Waves to Control Fusion Plasma Density

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

    Using Radio Waves to Control Fusion Plasma Density Using Radio Waves to Control Fusion Plasma Density Simulations Run at NERSC Support Fusion Experiments at MIT, General Atomics...

  10. Advanced Radio Frequency-Based Sensors for Monitoring Diesel...

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

    Radio Frequency-Based Sensors for Monitoring Diesel Particulate Filter Loading and Regeneration Advanced Radio Frequency-Based Sensors for Monitoring Diesel Particulate Filter...

  11. Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel...

    Office of Environmental Management (EM)

    Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel Consumption, Wins R&D 100 Award Radio Frequency Diesel Particulate Filter Sensor Reduces Fuel Consumption, Wins R&D...

  12. The Neo-Flex LCD Arm is the perfect accessory to add flexibility to your LCD monitor or TV. Sleek and streamlined, it frees up desk space and allows you

    E-Print Network [OSTI]

    Saskatchewan, University of

    The Neo-Flex LCD Arm is the perfect accessory to add flexibility to your LCD monitor or TV. Sleek lifting the LCD with the other hand. Then position the LCD where you want it and release the button. It. Highlights · Great value at a great price · Easily position your LCD or TV for maximum comfort

  13. data_sets.indd

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

    DATA SETS T est your technology with real data from RMOTC. RMOTC offers its non-proprietary data free of charge under certain terms and conditions. If you or your organization is...

  14. Synchronization of Limit Sets

    E-Print Network [OSTI]

    Changpin Li; Weihua Deng

    2005-10-10T23:59:59.000Z

    In this Letter, we derive a sufficient condition of synchronizing limit sets (attractors and repellers) by using the linear feedback control technique proposed here. There examples are included. The numerical simulations and computer graphics show that our method work well.

  15. Brightest Cluster Galaxies in the Extended GMRT radio halo cluster sample. Radio properties and cluster dynamics

    E-Print Network [OSTI]

    Kale, Ruta; Cassano, Rossella; Giacintucci, Simona; Bardelli, sandro; Dallacasa, Daniele; Zucca, Elena

    2015-01-01T23:59:59.000Z

    Brightest Cluster Galaxies (BCGs) show exceptional properties over the whole electromagnetic spectrum. Their special location at the centres of galaxy clusters raises the question of the role of the environment on their radio properties. To decouple the effect of the galaxy mass and of the environment in their statistical radio properties, we investigate the possible dependence of the occurrence of radio loudness and of the fractional radio luminosity function on the dynamical state of the hosting cluster. We studied the radio properties of the BCGs in the Extended GMRT Radio Halo Survey (EGRHS). We obtained a statistical sample of 59 BCGs, which was divided into two classes, depending on the dynamical state of the host cluster, i.e. merging (M) and relaxed (R). Among the 59 BCGs, 28 are radio-loud, and 31 are radio--quiet. The radio-loud sources are located favourably located in relaxed clusters (71\\%), while the reverse is true for the radio-quiet BCGs, mostly located in merging systems (81\\%). The fraction...

  16. Set theory and physics

    SciTech Connect (OSTI)

    Svozil, K. [Univ. of Technology, Vienna (Austria)

    1995-11-01T23:59:59.000Z

    Inasmuch as physical theories are formalizable, set theory provides a framework for theoretical physics. Four speculations about the relevance of set theoretical modeling for physics are presented: the role of transcendental set theory (i) in chaos theory, (ii) for paradoxical decompositions of solid three-dimensional objects, (iii) in the theory of effective computability (Church-Turing thesis) related to the possible {open_quotes}solution of supertasks,{close_quotes} and (iv) for weak solutions. Several approaches to set theory and their advantages and disadvantages for physical applications are discussed: Cantorian {open_quotes}naive{close_quotes} (i.e., nonaxiomatic) set theory, contructivism, and operationalism. In the author`s opinion, an attitude, of {open_quotes}suspended attention{close_quotes} (a term borrowed from psychoanalysis) seems most promising for progress. Physical and set theoretical entities must be operationalized wherever possible. At the same time, physicists should be open to {open_quotes}bizarre{close_quotes} or {open_quotes}mindboggling{close_quotes} new formalisms, which need not be operationalizable or testable at the time of their creation, but which may successfully lead to novel fields of phenomenology and technology.

  17. Suppression of automotive radio frequency interference 

    E-Print Network [OSTI]

    McLaughlin, Cleon Crosby

    1969-01-01T23:59:59.000Z

    of the spark plug and dlstribijtor gap brcakdo'sns is r epr educed by sc'ri tchi ng from an equiva- lent capacj cor befo'. gap Lreakdo'sn to an equivalent gap res j stance aiel:i ndu'':!nce dur. , nrJ b i akdo~sn This capa- bil i tV i ' . &ne &of the major... into lumped clem!'. nts and by providing equiva. 'ent cir uits for the disirib!!tor and spark plug gapa in both co! ducting and non ? conducti. ng states. Unfor unatcly, the state variable rr. odel recuires a grea. i deal of computer time in order...

  18. Radio-transparent multi-layer insulation for radiowave receivers

    SciTech Connect (OSTI)

    Choi, J. [Korea University, Anam-dong Seongbuk-gu, Seoul 136-713 (Korea, Republic of)] [Korea University, Anam-dong Seongbuk-gu, Seoul 136-713 (Korea, Republic of); Ishitsuka, H. [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan)] [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Mima, S. [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan)] [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Oguri, S., E-mail: shugo@post.kek.jp [Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan); Takahashi, K. [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan) [Terahertz Sensing and Imaging Team, Terahertz-wave Research Group, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198 (Japan); Department of Physics, Tohoku University, Sendai, Miyagi 980-8578 (Japan); Tajima, O. [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan) [Department of Particle and Nuclear Physics, School of High Energy Accelerator Science, The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0193 (Japan); Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Oho, Tsukuba, Ibaraki 305-0801 (Japan)

    2013-11-15T23:59:59.000Z

    In the field of radiowave detection, enlarging the receiver aperture to enhance the amount of light detected is essential for greater scientific achievements. One challenge in using radio transmittable apertures is keeping the detectors cool. This is because transparency to thermal radiation above the radio frequency range increases the thermal load. In shielding from thermal radiation, a general strategy is to install thermal filters in the light path between aperture and detectors. However, there is difficulty in fabricating metal mesh filters of large diameters. It is also difficult to maintain large diameter absorptive-type filters in cold because of their limited thermal conductance. A technology that maintains cold conditions while allowing larger apertures has been long-awaited. We propose radio-transparent multi-layer insulation (RT-MLI) composed from a set of stacked insulating layers. The insulator is transparent to radio frequencies, but not transparent to infrared radiation. The basic idea for cooling is similar to conventional multi-layer insulation. It leads to a reduction in thermal radiation while maintaining a uniform surface temperature. The advantage of this technique over other filter types is that no thermal links are required. As insulator material, we used foamed polystyrene; its low index of refraction makes an anti-reflection coating unnecessary. We measured the basic performance of RT-MLI to confirm that thermal loads are lowered with more layers. We also confirmed that our RT-MLI has high transmittance to radiowaves, but blocks infrared radiation. For example, RT-MLI with 12 layers has a transmittance greater than 95% (lower than 1%) below 200 GHz (above 4 THz). We demonstrated its effects in a system with absorptive-type filters, where aperture diameters were 200 mm. Low temperatures were successfully maintained for the filters. We conclude that this technology significantly enhances the cooling of radiowave receivers, and is particularly suitable for large-aperture systems. This technology is expected to be applicable to various fields, including radio astronomy, geo-environmental assessment, and radar systems.

  19. Multi-mode radio frequency device

    DOE Patents [OSTI]

    Gilbert, Ronald W. (Morgan Hill, CA); Carrender, Curtis Lee (Morgan Hill, CA); Anderson, Gordon A. (Benton City, WA); Steele, Kerry D. (Kennewick, WA)

    2007-02-13T23:59:59.000Z

    A transponder device having multiple modes of operation, such as an active mode and a passive mode, wherein the modes of operation are selected in response to the strength of a received radio frequency signal. A communication system is also provided having a transceiver configured to transmit a radio frequency signal and to receive a responsive signal, and a transponder configured to operate in a plurality of modes and to activate modes of operation in response to the radio frequency signal. Ideally, each mode of operation is activated and deactivated independent of the other modes, although two or more modes may be concurrently operational.

  20. High power radio frequency attenuation device

    DOE Patents [OSTI]

    Kerns, Quentin A. (Bloomingdale, IL); Miller, Harold W. (Winfield, IL)

    1984-01-01T23:59:59.000Z

    A resistor device for attenuating radio frequency power includes a radio frequency conductor connected to a series of fins formed of high relative magnetic permeability material. The fins are dimensional to accommodate the skin depth of the current conduction therethrough, as well as an inner heat conducting portion where current does not travel. Thermal connections for air or water cooling are provided for the inner heat conducting portions of each fin. Also disclosed is a resistor device to selectively alternate unwanted radio frequency energy in a resonant cavity.

  1. 26.1 / M. Doshi 26.1: Low-Frequency Square-Wave Drive for Large Screen LCD-TV

    E-Print Network [OSTI]

    with accurate current control and regulation. The most common electronic ballasts, based on high frequency LCC and removes many of the drawbacks associated with a high frequency drive, including energy loss through26.1 / M. Doshi 26.1: Low-Frequency Square-Wave Drive for Large Screen LCD-TV Backlighting Systems

  2. WWJ-TV CBS Detroit/CW50 Detroit Internship Job Descriptions Community Affairs/Programming Internship: This internship provides students

    E-Print Network [OSTI]

    Cinabro, David

    WWJ-TV CBS Detroit/CW50 Detroit Internship Job Descriptions Community Affairs/Programming Internship: This internship provides students interns the opportunity to gain experience in Community Affairs internships offered for the winter, summer, and fall terms. Interns generally work either a Monday

  3. Automotive Travel Education Employment House & Home Real Estate TV Listings Marathon Golf Yellow News Weather Sports Health Money Tech Recipes Entertainment Traffic NBC 4

    E-Print Network [OSTI]

    Southern California, University of

    's research will emphasize threats to electrical power plants, transportation and telecommunication systemsSearch Automotive Travel Education Employment House & Home Real Estate TV Listings Marathon Golf November 25, 2003 LOS ANGELES -- The University of Southern California will serve as a key national center

  4. How Can I Protect My Child From Sexual Assault? Parents are surrounded by messages about child sexual abuse. Talk shows and TV news warn parents

    E-Print Network [OSTI]

    Olsen, Stephen L.

    sexual abuse. Talk shows and TV news warn parents about dangers at school, in the home about sexual abuse and how to prevent it. Talk to your children about sexuality and sexual abuse in age at their private parts unless they need to touch them to provide care. If someone does need to touch them in those

  5. Gravitational Redshift Experiment with the Space Radio Telescope RadioAstron

    E-Print Network [OSTI]

    D. Litvinov; N. Bartel; K. Belousov; M. Bietenholz; A. Biriukov; A. Fionov; A. Gusev; V. Kauts; A. Kovalenko; V. Kulagin; N. Poraiko; V. Rudenko

    2015-03-12T23:59:59.000Z

    A unique test of general relativity is possible with the space radio telescope RadioAstron. The ultra-stable on-board hydrogen maser frequency standard and the highly eccentric orbit make RadioAstron an ideal instrument for probing the gravitational redshift effect. Large gravitational potential variation, occurring on the time scale of $\\sim$24 hr, causes large variation of the on-board H-maser clock rate, which can be detected via comparison with frequency standards installed at various ground radio astronomical observatories. The experiment requires specific on-board hardware operating modes and support from ground radio telescopes capable of tracking the spacecraft continuously and equipped with 8.4 or 15 GHz receivers. Our preliminary estimates show that $\\sim$30 hr of the space radio telescope's observational time are required to reach $\\sim 2\\times10^{-5}$ accuracy in the test, which would constitute a factor of 10 improvement over the currently achieved best result.

  6. Gravitational Redshift Experiment with the Space Radio Telescope RadioAstron

    E-Print Network [OSTI]

    Litvinov, D; Belousov, K; Bietenholz, M; Biriukov, A; Fionov, A; Gusev, A; Kauts, V; Kovalenko, A; Kulagin, V; Poraiko, N; Rudenko, V

    2015-01-01T23:59:59.000Z

    A unique test of general relativity is possible with the space radio telescope RadioAstron. The ultra-stable on-board hydrogen maser frequency standard and the highly eccentric orbit make RadioAstron an ideal instrument for probing the gravitational redshift effect. Large gravitational potential variation, occurring on the time scale of $\\sim$24 hr, causes large variation of the on-board H-maser clock rate, which can be detected via comparison with frequency standards installed at various ground radio astronomical observatories. The experiment requires specific on-board hardware operating modes and support from ground radio telescopes capable of tracking the spacecraft continuously and equipped with 8.4 or 15 GHz receivers. Our preliminary estimates show that $\\sim$30 hr of the space radio telescope's observational time are required to reach $\\sim 2\\times10^{-5}$ accuracy in the test, which would constitute a factor of 10 improvement over the currently achieved best result.

  7. Energy Efficient Transmissions In MIMO Cognitive Radio Networks

    E-Print Network [OSTI]

    Huang, Jianwei

    Energy Efficient Transmissions In MIMO Cognitive Radio Networks Liqun Fu The Institute of Network@ie.cuhk.edu.hk Abstract-In this paper, we consider energy efficient transmis sions for MIMO cognitive radio networks. Index Terms-Cognitive radio networks, MIMO, Energy efficiency. I. INTRODUCTION Cognitive radio, which

  8. RADIO PROCEDURES DURING NORMAL OPERATING CONDITIONS CALLING AND COMMUNICATING TECHNIQUES

    E-Print Network [OSTI]

    Brody, James P.

    RADIO PROCEDURES DURING NORMAL OPERATING CONDITIONS CALLING AND COMMUNICATING TECHNIQUES The secret are going to say. Many people with radios have a tendency to talk and/or repeat too much. Say what you need until it is second nature. Practicing proper day-to-day radio procedures will make emergency radio

  9. Leveraging Multiple Heterogeneous Radios for Energy-efficient Routing

    E-Print Network [OSTI]

    Kravets, Robin

    /low- rate radio) and presented a dual-radio communication protocol that manages the transitions of the high-power/n. To calculate the anticipated delay, each node mon- Power Source Dual Power Dual Radio MonitorPower Meter Figure efficiency than these lower-power radios due to their higher bit rates, the larger idle costs make them less

  10. The nature of the optical---radio correlations for powerful radio galaxies

    E-Print Network [OSTI]

    C. N. Tadhunter; R. Morganti; A. Robinson; R. Dickson; M. Villar-Martin; R. A. E. Fosbury

    1998-07-23T23:59:59.000Z

    The nature of the optical--radio correlations for powerful radio galaxies is investigated using spectroscopic observations of a complete sample of southern 2Jy radio sources. In line with previous work, we find that significant correlations exist between the luminosities of the [OIII]5007, [OII]3727 and Hbeta emission lines and the radio luminosity. However, our observations are not easily reconciled with the idea that these correlations are caused by the increase in the power of the photoionizing quasar as the jet power increases, with average ISM properties not changing appreciably with redshift or radio power: not only do we find that the scatter in the L_[OIII] vs. L_radio correlation is significantly larger than in L_[OII]} vs. L_radio and L_Hbeta vs. L_radio correlations, but the ionization state deduced from the emission lines does not increase with radio power as predicted by the simple, constant ISM, photionization model. We conclude that: (a) there exists a considerable range in the quasar ionizing luminosity at a given redshift; and (b) that the mean density of the emission line clouds is larger in the high redshift/high power radio sources. The latter density enhancement may either be a consequence of the increased importance of jet-cloud interactions or, alternatively, due to a higher pressure in the confining hot ISM, in the high redshift objects. Deep spectra show that many of the sources in our sample are broad line radio galaxies (BLRG). The fact that the BLRG are observed out the redshift limit of the survey, overlapping in redshift with the quasars, argues against the idea that BLRG are simply the low radio power counterparts of high power, high redshift quasars.

  11. Functional Answer Set Programming

    E-Print Network [OSTI]

    Cabalar, Pedro

    2010-01-01T23:59:59.000Z

    In this paper we propose an extension of Answer Set Programming (ASP), and in particular, of its most general logical counterpart, Quantified Equilibrium Logic (QEL), to deal with partial functions. Although the treatment of equality in QEL can be established in different ways, we first analyse the choice of decidable equality with complete functions and Herbrand models, recently proposed in the literature. We argue that this choice yields some counterintuitive effects from a logic programming and knowledge representation point of view. We then propose a variant called QELF where the set of functions is partitioned into partial and Herbrand functions (we also call constructors). In the rest of the paper, we show a direct connection to Scott's Logic of Existence and present a practical application, proposing an extension of normal logic programs to deal with partial functions and equality, so that they can be translated into function-free normal programs, being possible in this way to compute their answer sets...

  12. Security approaches for Radio Frequency Identification systems

    E-Print Network [OSTI]

    Foley, Joseph Timothy, 1976-

    2007-01-01T23:59:59.000Z

    In this thesis, I explore the challenges related to the security of the Electronic Product Code (EPC) class of Radio Frequency Identification (RFID) tags and associated data. RFID systems can be used to improve supply chain ...

  13. Commercial Mobile Radio Service (WRI CMRS)

    E-Print Network [OSTI]

    Commercial Mobile Radio Service (WRI ­ CMRS) Commercial Motor Vehicle Roadside Technology Corridor Safety Technology Showcase October 14, 2010 Commercial Motor Vehicle Roadside Technology Corridor #12 caused by higher frequency of roadside safety inspections using wireless technologies. · Benefits

  14. Radio Wavelength Observatories within the Exploration Architecture

    E-Print Network [OSTI]

    J. Lazio; R. J. Macdowall; J. Burns; L. Demaio; D. L. Jones; K. W. Weiler

    2007-01-26T23:59:59.000Z

    Observations at radio wavelengths address key problems in astrophysics, astrobiology, and lunar structure including the first light in the Universe (the Epoch of Reionization), the presence of magnetic fields around extrasolar planets, particle acceleration mechanisms, and the structure of the lunar ionosphere. Moreover, achieving the performance needed to address these scientific questions demands observations at wavelengths longer than those that penetrate the Earth's ionosphere, observations in extremely "radio quiet" locations such as the Moon's far side, or both. We describe a series of lunar-based radio wavelength interferometers of increasing capability. The Radio Observatory for Lunar Sortie Science (ROLSS) is an array designed to be deployed during the first lunar sorties (or even before via robotic rovers) and addressing particle acceleration and the lunar ionosphere. Future arrays would be larger, more capable, and deployed as experience is gained in working on the lunar surface.

  15. UC Irvine 800MHz Trunked Radio System Revised 08/16/96 UCI RADIO USE AND PROCEDURES

    E-Print Network [OSTI]

    Brody, James P.

    and/or sound effects over the radio. This activity violates UC and Federal Communications Commission communications are in progress on other talk groups and your unnecessary transmission may delay another radio radio identifier or radio call ]__ , reporting an emergency. " The Communications Center dispatcher

  16. Radio signals of particle dark matter

    E-Print Network [OSTI]

    Marco Regis

    2011-12-08T23:59:59.000Z

    In most of particle dark matter (DM) models, the DM candidate injects sizable fluxes of high-energy electrons and positrons through its annihilations or decays. Emitted in regions with magnetic field, they in turn give raise to a synchrotron radiation, which typically covers radio and infrared bands. We discuss the possibility of detecting signatures of Galactic and extra-galactic DM in the total intensity and small-scale anisotropies of the radio background.

  17. Low Luminosity Radio Loud Active Galactic Nuclei

    E-Print Network [OSTI]

    G. Giovannini; M. Giroletti

    2007-08-30T23:59:59.000Z

    I review observational properties of low power radio loud AGN. High resolution VLBI observations allow the estimate of the jet velocity and orientation with respect to the line of sight and the determination of the Doppler factor. These data reveal rich structures, including two-sided jets and secondary components. New results on 1144+35, a giant radio source with superluminal motion are shown in detail.

  18. Knowledge Exchange records from 01/04/2013 08/07/2013 CATEGORY 15 -Media: includes webinars, podcasts, DVDs, videos, press

    E-Print Network [OSTI]

    , podcasts, DVDs, videos, press releases, radio, TV, newsletter articles) Record ID 4010244 Title: Coverage

  19. Radio flares from gamma-ray bursts

    E-Print Network [OSTI]

    Kopac, D; Kobayashi, S; Virgili, F J; Harrison, R; Japelj, J; Guidorzi, C; Melandri, A; Gomboc, A

    2015-01-01T23:59:59.000Z

    We present predictions of centimeter and millimeter radio emission from reverse shocks in the early afterglows of gamma-ray bursts with the goal of determining their detectability with current and future radio facilities. Using a range of GRB properties, such as peak optical brightness and time, isotropic equivalent gamma-ray energy and redshift, we simulate radio light curves in a framework generalized for any circumburst medium structure and including a parametrization of the shell thickness regime that is more realistic than the simple assumption of thick- or thin-shell approximations. Building on earlier work by Mundell et al. (2007) and Melandri et al. (2010) in which the typical frequency of the reverse shock was suggested to lie at radio, rather than optical wavelengths at early times, we show that the brightest and most distinct reverse-shock radio signatures are detectable up to 0.1 -- 1 day after the burst, emphasizing the need for rapid radio follow-up. Detection is easier for bursts with later opt...

  20. LIMITS ON PROMPT, DISPERSED RADIO PULSES FROM GAMMA-RAY BURSTS

    SciTech Connect (OSTI)

    Bannister, K. W.; Murphy, T.; Gaensler, B. M. [Sydney Institute for Astronomy (SIfA), School of Physics A29, University of Sydney, NSW 2006 (Australia); Reynolds, J. E., E-mail: keith.bannister@csiro.au [CSIRO Astronomy and Space Science, P.O. Box 76, Epping, NSW 1710 (Australia)

    2012-09-20T23:59:59.000Z

    We have searched for prompt radio emission from nine gamma-ray bursts (GRBs) with a 12 m telescope at 1.4 GHz, with a time resolution of 64 {mu}s to 1 s. We detected single dispersed radio pulses with significances >6{sigma} in the few minutes following two GRBs. The dispersion measures of both pulses are well in excess of the expected Galactic values, and the implied rate is incompatible with known sources of single dispersed pulses. The arrival times of both pulses also coincide with breaks in the GRB X-ray light curves. A null trial and statistical arguments rule out random fluctuations as the origin of these pulses with >95% and {approx}97% confidence, respectively, although a simple population argument supports a GRB origin with confidence of only 2%. We caution that we cannot rule out radio frequency interference (RFI) as the origin of these pulses. If the single pulses are not related to the GRBs, we set an upper limit on the flux density of radio pulses emitted between 200 and 1800 s after a GRB of 1.27w {sup -1/2} Jy, where 6.4 Multiplication-Sign 10{sup -5} s < w < 32 Multiplication-Sign 10{sup -3} s is the pulse width. We set a limit of less than 760 Jy for long timescale (>1 s) variations. These limits are some of the most constraining at high time resolution and GHz frequencies in the early stages of the GRB phenomenon.

  1. Logic and the set theory Lecture 19: The set theory

    E-Print Network [OSTI]

    Choi, Suhyoung

    Logic and the set theory Lecture 19: The set theory S. Choi Department of Mathematical Science KAIST, Daejeon, South Korea Fall semester, 2012 S. Choi (KAIST) Logic and set theory November 20, 2012 1 / 24 #12;Introduction About this lecture Axioms of the set theory S. Choi (KAIST) Logic and set theory

  2. 426 nature physics | VOL 2 | JULY 2006 | www.nature.com/naturephysics Prosperity, complexity

    E-Print Network [OSTI]

    Loss, Daniel

    of telephones, radio, automobiles, aeroplanes and television2 . At a constantly accelerating pace, this change The World is Flat: A Brief History of the Twenty-first Century4 , Thomas Friedman gives a succinct

  3. HURRICANES AND TORNADOES What should I know about hurricanes?

    E-Print Network [OSTI]

    Fernandez, Eduardo

    to local newspapers, radio and television stations, the FAU Webmaster and the hurricane hotline that serves (207-260 mph) Well-built homes leveled. F5 INCREDIBLE (261-318 mph) Homes lifted off foundations

  4. HURRICANES AND TORNADOES What should I know about hurricanes?

    E-Print Network [OSTI]

    Fernandez, Eduardo

    by the University to local newspapers, radio and television stations, the FAU Webmaster and the hurricane hotline lifted off foundations and thrown. Cars thrown as far as 100 meters. What is a tornado watch

  5. HURRICANES AND TORNADOES What should I know about hurricanes?

    E-Print Network [OSTI]

    Fernandez, Eduardo

    to local newspapers, radio and television stations, the FAU Webmaster and the hotline that serves all lifted off foundations and thrown. Cars thrown. What is a tornado watch/warning? This is issued

  6. A wireless, low power, asynchronous, multi-sensor, temperature network

    E-Print Network [OSTI]

    Levy, Daniel M. G. H. (Daniel Matthew Guy Ho), 1979-

    2003-01-01T23:59:59.000Z

    Wireless communication is not new. Radio and television broadcasting, as well as air traffic control have used wireless signals in their products for decades. The transmitters for these applications require large antennas ...

  7. Passive Synthetic Aperture Radar Imaging of Ground Moving Targets

    E-Print Network [OSTI]

    Yazici, Birsen

    of opportunity such as radio, cell phone, and television transmission towers. The absence of active signal towers. We describe a novel forward model and a corresponding filtered-backprojection type image

  8. Relative Span Weighted Localization of Uncooperative Nodes in Wireless Networks

    E-Print Network [OSTI]

    Barbeau, Michel

    911) provisions [1] as the Federal Communications Commission (FCC) in the U.S. [2] Under Phase II Radio- television Telecommunications Commission (CRTC) to regulate the same wireless En- hanced 911 (E

  9. Designed for Work, but not from Here: Rural and Remote Perspectives on Networked Technology

    E-Print Network [OSTI]

    Federal Communications Commission (FCC) report indicated that 16,000 towers would need to be added in 2010 by the Canadian Radio-television and Telecommunications Commission (CRTC), in Canada, 16

  10. On Q-sets

    E-Print Network [OSTI]

    Fleissner, William G.; Miller, Arnold W.

    1980-02-01T23:59:59.000Z

    from X is a separable normal nonmetrizable Moore space. Theorem 2. Each of the following statements implies the next. (a) Martin's Axiom plus the negation of the Continuum Hypothesis. (b) There are no ß limits in the partial order (ß(u),Q mod finite.... Assume that 2"1 = wherep = (pß: ß is a sequence of basic open sets from B and where f = wim each ry m something like P(A, X) above. In the extension, M[G], we...

  11. Radio broadcasting and the politics of mass culture in transwar Japan

    E-Print Network [OSTI]

    Jung, Ji Hee

    2010-01-01T23:59:59.000Z

    Press, Cox, Jim. The Great Radio Audience ParticipationSusan. Listening In: Radio and the American Imagination. NewCalling: Japanese Overseas Radio Broadcasting 1937- 1945.

  12. Radio-frequency identification could help reduce the spread of plant pathogens

    E-Print Network [OSTI]

    Luvisi, Andrea; Panattoni, Alessandra; Triolo, Enrico

    2012-01-01T23:59:59.000Z

    ReVIEW Article Radio-frequency identification could helpcertified nursery stock. Radio- frequency identification (Panattoni and Enrico Triolo Radio-frequency identification (

  13. Radio Linear and Circular Polarization from M81*

    E-Print Network [OSTI]

    Andreas Brunthaler; Geoffrey C. Bower; Heino Falcke

    2006-05-05T23:59:59.000Z

    We present results from archival Very Large Array (VLA) data and new VLA observations to investigate the long term behavior of the circular polarization of M81*, the nuclear radio source in the nearby galaxy M81. We also used the Berkeley-Illinois-Maryland Association (BIMA) array to observe M81* at 86 and 230 GHz. M81* is unpolarized in the linear sense at a frequency as high as 86 GHz and shows variable circular polarization at a frequency as high as 15 GHz. The spectrum of the fractional circular polarization is inverted in most of our observations. The sign of circular polarization is constant over frequency and time. The absence of linear polarization sets a lower limit to the accretion rate of $10^{-7} M_\\odot y^{-1}$. The polarization properties are strikingly similar to the properties of Sgr A*, the central radio source in the Milky Way. This supports the hypothesis that M81* is a scaled up version of Sgr A*. On the other hand, the broad band total intensity spectrum declines towards milimeter wavelengths which differs from previous observations of M81* and also from Sgr A*.

  14. Radio-Excess IRAS Galaxies: IV. Optical Spectroscopy

    E-Print Network [OSTI]

    Catherine L. Buchanan; Peter J. McGregor; Geoffrey V. Bicknell; Michael A. Dopita

    2006-04-21T23:59:59.000Z

    This is the fourth in our series of papers investigating radio-excess galaxies, which have radio emission associated with an active nucleus but which do not fit into the traditional categories of either radio-loud or radio-quiet active galaxies. In this paper, we present optical spectra of our sample of FIR-luminous radio-excess galaxies. Optical emission line diagnostics are used to determine the dominant source of the ionizing radiation. We find that radio excess is an excellent indicator of the presence of an active nucleus: the radio-excess sample contains a much higher fraction of AGN than samples selected on FIR luminosity alone, or using other criteria such as warm FIR colors. Several objects have ambiguous classifications and are likely to be composite objects with mixed excitation. The type of optical spectrum appears to be associated with the radio-loudness: radio-loud objects may be more `pure' AGN than radio-intermediate objects. We find strong evidence for interaction between the radio plasma and the surrounding gas. The jet energy fluxes of the radio-excess objects, inferred from the [O III] luminosities, are lower than in powerful radio sources, consistent with our previous results. We conclude that the jets of radio-intermediate sources are intrinsically weaker than those in sources with more powerful radio emission. A significant fraction of the sample spectra show post-starburst stellar continuum, with A-star absorption lines, consistent with the large fraction of merging or disturbed host galaxies in the sample. The ages of the radio sources are significantly less than those of A stars indicating that, if the radio sources are associated with merging activity, there is a delay between the interaction and the initiation of the radio activity. (Abridged.)

  15. Cognitive Radio will revolutionize American transportation

    ScienceCinema (OSTI)

    None

    2013-12-06T23:59:59.000Z

    Cognitive Radio will revolutionize American transportation. Through smart technology, it will anticipate user needs; detect available bandwidths and frequencies then seamlessly connect vehicles, infrastructures, and consumer devices; and it will support the Department of Transportation IntelliDrive Program, helping researchers, auto manufacturers, and Federal and State officials advance the connectivity of US transportation systems for improved safety, mobility, and environmental conditions. Using cognitive radio, a commercial vehicle will know its driver, onboard freight and destination route. Drivers will save time and resources communicating with automatic toll booths and know ahead of time whether to stop at a weigh station or keep rolling. At accident scenes, cognitive radio sensors on freight and transportation modes can alert emergency personnel and measure on-site, real-time conditions such as a chemical leak. The sensors will connect freight to industry, relaying shipment conditions and new delivery schedules. For industry or military purposes, cognitive radio will enable real-time freight tracking around the globe and its sensory technology can help prevent cargo theft or tampering by alerting shipper and receiver if freight is tampered with while en route. For the average consumer, a vehicle will tailor the transportation experience to the passenger such as delivering age-appropriate movies via satellite. Cognitive radio will enhance transportation safety by continually sensing what is important to the user adapting to its environment and incoming information, and proposing solutions that improve mobility and quality of life.

  16. Seyfert galaxies: Nuclear Radio Structure and Unification

    E-Print Network [OSTI]

    Lal, Dharam V; Gabuzda, Denise

    2011-01-01T23:59:59.000Z

    A radio study of a carefully selected sample of 20 Seyfert galaxies that are matched in orientation-independent parameters, which are measures of intrinsic active galactic nuclei (AGN) power and host galaxy properties is presented to test the predictions of the unified scheme hypothesis. Our sample sources have core flux densities greater than 8 mJy at 5 GHz on arcsec-scales due to the feasibility requirements. These simultaneous pc-scale and kpc-scale radio observations reveal (i) that Seyfert 1 and Seyfert 2 galaxies have equal tendency to show compact radio structures on mas-scales, (ii) the distributions of pc-scale and kpc-scale radio luminosities are similar for both Seyfert 1 and Seyfert 2 galaxies, (iii) no evidence for relativistic beaming in Seyfert galaxies, (iv) similar distributions of source spectral indices in spite of the fact that Seyferts show nuclear radio flux density variations, and (v) the distributions of projected linear size for Seyfert 1 and Seyfert 2 galaxies are not significantly d...

  17. Cognitive Radio will revolutionize American transportation

    SciTech Connect (OSTI)

    None

    2013-07-22T23:59:59.000Z

    Cognitive Radio will revolutionize American transportation. Through smart technology, it will anticipate user needs; detect available bandwidths and frequencies then seamlessly connect vehicles, infrastructures, and consumer devices; and it will support the Department of Transportation IntelliDrive Program, helping researchers, auto manufacturers, and Federal and State officials advance the connectivity of US transportation systems for improved safety, mobility, and environmental conditions. Using cognitive radio, a commercial vehicle will know its driver, onboard freight and destination route. Drivers will save time and resources communicating with automatic toll booths and know ahead of time whether to stop at a weigh station or keep rolling. At accident scenes, cognitive radio sensors on freight and transportation modes can alert emergency personnel and measure on-site, real-time conditions such as a chemical leak. The sensors will connect freight to industry, relaying shipment conditions and new delivery schedules. For industry or military purposes, cognitive radio will enable real-time freight tracking around the globe and its sensory technology can help prevent cargo theft or tampering by alerting shipper and receiver if freight is tampered with while en route. For the average consumer, a vehicle will tailor the transportation experience to the passenger such as delivering age-appropriate movies via satellite. Cognitive radio will enhance transportation safety by continually sensing what is important to the user adapting to its environment and incoming information, and proposing solutions that improve mobility and quality of life.

  18. Extended emission around GPS radio sources

    E-Print Network [OSTI]

    C. Stanghellini; C. P. O'Dea; D. Dallacasa; P. Cassaro; S. A. Baum; R. Fanti; C. Fanti

    2005-07-21T23:59:59.000Z

    Extended radio emission detected around a sample of GHz Peaked Spectrum (GPS) radio sources is discussed. Evidence for extended emission which is related to the GPS source is found in 6 objects out of 33. Three objects are associated with quasars with core-jet pc-scale morphology, and three are identified with galaxies with symmetric (CSO) radio morphology. We conclude that the core-jet GPS quasars are likely to be beamed objects with a continuous supply of energy from the core to the kpc scale. It is also possible that low surface brightness extended radio emission is present in other GPS quasars but the emission is below our detection limit due to the high redshifts of the objects. On the other hand, the CSO/galaxies with extended large scale emission may be rejuvenated sources where the extended emission is the relic of previous activity. In general, the presence of large scale emission associated with GPS galaxies is uncommon, suggesting that in the context of the recurrent activity model, the time scale between subsequent bursts is in general longer than the radiative lifetime of the radio emission from the earlier activity.

  19. Ultrafast electron diffraction with radio-frequency compressed electron pulses

    SciTech Connect (OSTI)

    Chatelain, Robert P.; Morrison, Vance R.; Godbout, Chris; Siwick, Bradley J. [Departments of Physics and Chemistry, Center for the Physics of Materials, McGill University, Montreal (Canada)

    2012-08-20T23:59:59.000Z

    We report on the complete characterization of time resolution in an ultrafast electron diffraction (UED) instrument based on radio-frequency electron pulse compression. The temporal impulse response function of the instrument was determined directly in pump-probe geometry by performing electron-laser pulse cross-correlation measurements using the ponderomotive interaction. With optimal settings, a stable impulse response of 334{+-}10 fs was measured at a bunch charge of 0.1 pC (6.24 Multiplication-Sign 10{sup 5} electrons/pulse); a dramatic improvement compared to performance without pulse compression. Phase stability currently limits the impulse response of the UED diffractometer to the range of 334-500 fs, for bunch charges ranging between 0.1 and 0.6 pC.

  20. TV or Not TV | 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 742EnergyOn April 23, 2014,ZaleskiThis Decision considers anExercise32Performance of a

  1. CENSORS: A Combined EIS-NVSS Survey Of Radio Sources. I. Sample definition, radio data and optical identifications

    E-Print Network [OSTI]

    P. N. Best; J. N. Arts; H. J. A. Rottgering; R. Rengelink; M. H. Brookes; J. Wall

    2003-08-22T23:59:59.000Z

    A new sample of radio sources, with the designated name CENSORS (A Combined EIS-NVSS Survey Of Radio Sources), has been defined by combining the NRAO VLA Sky Survey (NVSS) at 1.4 GHz with the ESO Imaging Survey (EIS) Patch D, a 3 by 2 degree region of sky centred at 09 51 36.0, -21 00 00 (J2000). New radio observations of 199 NVSS radio sources with NVSS flux densities S(1.4GHz) > 7.8mJy are presented, and compared with the EIS I-band imaging observations which reach a depth of I~23; optical identifications are obtained for over two-thirds of the ~150 confirmed radio sources within the EIS field. The radio sources have a median linear size of 6 arcseconds, consistent with the trend for lower flux density radio sources to be less extended. Other radio source properties, such as the lobe flux density ratios, are consistent with those of brighter radio source samples. From the optical information, 30-40% of the sources are expected to lie at redshifts z >~ 1.5. One of the key goals of this survey is to accurately determine the high redshift evolution of the radio luminosity function. These radio sources are at the ideal flux density level to achieve this goal; at redshifts z~2 they have luminosities which are around the break of the luminosity function and so provide a much more accurate census of the radio source population at those redshifts than the existing studies of extreme, high radio power sources. Other survey goals include investigating the dual--population unification schemes for radio sources, studying the radio luminosity dependence of the evolution of radio source environments, and understanding the radio power dependence of the K-z relation for radio galaxies.

  2. X-RAY OBSERVATIONS OF HIGH-B RADIO PULSARS

    SciTech Connect (OSTI)

    Olausen, S. A.; Kaspi, V. M. [Department of Physics, Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8 (Canada)] [Department of Physics, Rutherford Physics Building, McGill University, 3600 University Street, Montreal, Quebec, H3A 2T8 (Canada); Zhu, W. W. [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC, V6T 1Z1 (Canada)] [Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC, V6T 1Z1 (Canada); Vogel, J. K. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550 (United States)] [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550 (United States); Lyne, A. G.; Espinoza, C. M.; Stappers, B. W. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)] [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom); Manchester, R. N. [Australia Telescope National Facility, CSIRO Astronomy and Space Science, Epping, NSW 1710 (Australia)] [Australia Telescope National Facility, CSIRO Astronomy and Space Science, Epping, NSW 1710 (Australia); McLaughlin, M. A. [Department of Physics, West Virginia University, White Hall, Morgantown, WV 26506 (United States)] [Department of Physics, West Virginia University, White Hall, Morgantown, WV 26506 (United States)

    2013-02-10T23:59:59.000Z

    The study of high-magnetic-field pulsars is important for examining the relationships between radio pulsars, magnetars, and X-ray-isolated neutron stars (XINSs). Here, we report on X-ray observations of three such high-magnetic-field radio pulsars. We first present the results of a deep XMM-Newton observation of PSR J1734-3333, taken to follow up on its initial detection in 2009. The pulsar's spectrum is well fit by a blackbody with a temperature of 300 {+-} 60 eV, with bolometric luminosity L{sub bb}=2.0{sub -0.7}{sup +2.2} Multiplication-Sign 10{sup 32} erg s{sup -1}{approx}0.0036 E-dot for a distance of 6.1 kpc. We detect no X-ray pulsations from the source, setting a 1{sigma} upper limit on the pulsed fraction of 60% in the 0.5-3 keV band. We compare PSR J1734-3333 to other rotation-powered pulsars of similar age and find that it is significantly hotter, supporting the hypothesis that the magnetic field affects the observed thermal properties of pulsars. We also report on XMM-Newton and Chandra observations of PSRs B1845-19 and J1001-5939. We do not detect either pulsar, setting 3{sigma} upper limits on their blackbody temperatures of 48 and 56 eV, respectively. Despite the similarities in rotational properties, these sources are significantly cooler than all but one of the XINSs, which we attribute to the two groups having been born with different magnetic fields and hence evolving differently.

  3. Sounds energetic: the radio producer's energy minibook

    SciTech Connect (OSTI)

    Not Available

    1980-12-01T23:59:59.000Z

    The Minibook will be expanded into the final Radio Producer's Energy Sourcebook. Radio producers and broadcasters are asked to contribute ideas for presenting energy knowledge to the public and to be included in the Sourcebook. Chapter One presents a case study suggesting programming and promotion ideas and sample scripts for a radio campaign that revolves around no-cost or low-cost steps listeners can take to increase their home energy efficiency and save money. A variety of other energy topics and suggestions on ways to approach them are addressed in Chapter Two. Chapter Three contains energy directories for Baltimore, Philadelphia, Pittsburg, and Washington, DC. The directories will be expanded in the Sourcebook and will consist of a selection of local public and private sector energy-related organizations and list local experts and organizations and the best Federal, state, and local government programs that can provide consumers and citizens groups with information, technical assistance, and financial support. (MCW)

  4. Radio galaxies in the 2SLAQ Luminous Red Galaxy survey: II. The stellar populations of radio-loud and radio-quiet LRGs

    E-Print Network [OSTI]

    Helen M. Johnston; Elaine M. Sadler; Russell Cannon; Scott M. Croom; Nicholas P. Ross; Donald P. Schneider

    2007-11-21T23:59:59.000Z

    We present an analysis of the optical spectra of a volume-limited sample of 375 radio galaxies at redshift 0.4radio-quiet sources from the same survey, we also investigate the effect on the galaxy of the presence of an active nucleus. The composite spectra, binned by redshift and radio luminosity, all require two components to describe them, which we interpret as an old and a younger population. We found no evolution with redshift of the age of the younger population in radio galaxies, nor were they different from the radio-quiet comparison sample. Similarly, there is no correlation with radio power, with the exception that the most powerful radio sources (P(1.4) > 10^26 W/Hz) have younger stars and stronger emission lines than the less powerful sources. This suggests that we have located the threshold in radio power where strong emission lines "switch on", at radio powers of around 10^26 W/Hz. Except for the very powerful radio galaxies, the presence of a currently-active radio AGN does not appear to be correlated with any change in the observed stellar population of a luminous red galaxy at z~0.5.

  5. Radio-tracking reveals that lesser horseshoe bats (Rhinolophus hipposideros) forage in woodland

    E-Print Network [OSTI]

    Richner, Heinz

    Radio-tracking reveals that lesser horseshoe bats (Rhinolophus hipposideros) forage in woodland±8 g) precluded the use of radio-telemetry because commercially available radio-transmitters exceeded 10% of its body mass. In this study, radio- transmitters weighing

  6. GPS radio occultation with CHAMP Jens Wickert, Georg Beyerle, Torsten Schmidt, Christian Marquardt, Rolf

    E-Print Network [OSTI]

    GPS radio occultation with CHAMP Jens Wickert, Georg Beyerle, Torsten Schmidt, Christian Marquardt Positioning System) radio occultation experiment onboard the German CHAMP (CHAllenging Minisatellite Payload sensing of Earth's atmosphere, GPS radio occulta- tion 1 Introduction The CHAMP GPS radio occultation

  7. Coherent Transition Radiation in Askaryan radio detectors

    E-Print Network [OSTI]

    de Vries, Krijn D; van Eijndhoven, Nick; Meures, Thomas; O'Murchadha, Aongus; Scholten, Olaf

    2015-01-01T23:59:59.000Z

    We discuss the coherent transition radiation emitted by a macroscopic bunch of particles with a net charge traversing the boundary of two different media. The obtained expression is compared to the emission from a relativistically moving steady charge, as well the emission from a time-varying charge or current. As a first application, we discuss the transition radiation from high-energy cosmic-ray induced air showers hitting Earth's surface before the cascade has died out in the atmosphere. The induced emission gives rise to a radio signal which should be detectable in the currently operating Askaryan radio detectors built to search for the GZK neutrino flux.

  8. Multiple Objective Fitness Functions for Cognitive Radio Adaptation

    E-Print Network [OSTI]

    Newman, Timothy Ray

    2008-04-30T23:59:59.000Z

    This thesis explores genetic algorithm and rule-based optimization techniques used by cognitive radios to make operating parameter decisions. Cognitive radios take advantage of intelligent control methods by using sensed ...

  9. askaryan radio array: Topics by E-print Network

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

    Askaryan Radio Array (ARA) is an ultra-high energy (>1017 eV) cosmic neutrino detector in phased construction near the South Pole. ARA searches for radio Cherenkov emission...

  10. Pricing for Uplink Power Control in Cognitive Radio Networks

    E-Print Network [OSTI]

    Wang, Xinbing

    1 Pricing for Uplink Power Control in Cognitive Radio Networks Hui Yu, Lin Gao, Zheng Li, Xinbing of the proposed pricing scheme. Keywords: Cognitive radio, power control, non-cooperative game, profit management problems such as power control quite complicated. Wireless radio devices with "cognitive" ability

  11. Energy Efficient Transmissions in MIMO Cognitive Radio Networks

    E-Print Network [OSTI]

    Huang, Jianwei

    Energy Efficient Transmissions in MIMO Cognitive Radio Networks Liqun Fu The Institute of Network@ie.cuhk.edu.hk Abstract--In this paper, we consider energy efficient transmis- sions for MIMO cognitive radio networks on the traffic load of the secondary system. Index Terms--Cognitive radio networks, MIMO, Energy- efficiency. I

  12. Radio Imaging by Cooperative Wireless Network: Localization Algorithms and Experiments

    E-Print Network [OSTI]

    Savazzi, Stefano

    Radio Imaging by Cooperative Wireless Network: Localization Algorithms and Experiments Stefano-mail: (savazzi, nicoli)@elet.polimi.it Abstract-- Radio imaging allows to locate and track passive targets (i. INTRODUCTION Radio Imaging is an emerging technology for locating and tracking moving objects or people

  13. INVITED PAPER, IEEE PIMRC'97 HELSINKI, FINLAND. 0 Impulse Radio

    E-Print Network [OSTI]

    Southern California, University of

    INVITED PAPER, IEEE PIMRC'97 ­ HELSINKI, FINLAND. 0 Impulse Radio Robert A. Scholtz and Moe Z. Win, Los Angeles, CA 90089-2565 USA Abstract Impulse radio, a form of ultra-wide band signaling, has. This paper describes the characteristics of impulse radio, gives analytical estimates of its multiple access

  14. Radio Number for Trees Daphne Der-Fen Liu

    E-Print Network [OSTI]

    Liu, Daphne Der-Fen

    Radio Number for Trees Daphne Der-Fen Liu Department of Mathematics California State University be a connected graph with diameter diam(G). The radio number for G, denoted by rn(G), is the smallest integer k bound for the radio number of trees, and characterize the trees achiev- ing this bound. Moreover, we

  15. Radio Emission from Ultracool Dwarfs and the Relevant Radiation Mechanisms

    E-Print Network [OSTI]

    Radio Emission from Ultracool Dwarfs and the Relevant Radiation Mechanisms A thesis submitted have learnt a lot of knowledge which includes not only the radio instruments for observations, but also the science such as particle simulations for understanding the detected radio signal. Also, from this research

  16. Radio frequency analog electronics based on carbon nanotube transistors

    E-Print Network [OSTI]

    Rogers, John A.

    Radio frequency analog electronics based on carbon nanotube transistors Coskun Kocabas*, Hoon properties of individ- ual tubes. We have implemented solutions to some of these challenges to yield radio band with power gains as high as 14 dB. As a demon- stration, we fabricated nanotube transistor radios

  17. Radio Interferometry & The Measurement Equation -1 School of Physics

    E-Print Network [OSTI]

    Tittley, Eric

    Radio Interferometry & The Measurement Equation - 1 School of Physics and Astronomy An Introduction to Radio Interferometry and The Measurement Equation Formalism Pedagogical Seminar Louise M. Ker March 2010 Abstract The next generation of radio telescopes, such as LOFAR, e-Merlin, ASKAP, MeerKat and even- tually

  18. Radio-frequency scanning tunnelling microscopy U. Kemiktarak1

    E-Print Network [OSTI]

    LETTERS Radio-frequency scanning tunnelling microscopy U. Kemiktarak1 , T. Ndukum3 , K. C. Schwab3 measurementsinmesoscopicelectronicsandmechanics. Broadband noise measurements across the tunnel junction using this radio-frequency STM available from nanoscale optical and electrical displacement detection tech- niques, and the radio

  19. Pop Up Radio Archive: A Solution for Independent Producers

    E-Print Network [OSTI]

    Militzer, Burkhard

    Pop Up Radio Archive: A Solution for Independent Producers Anne Wootton, Bailey Smith, and Christen Penny UC Berkeley School of Information May 4, 2012 #12;Pop Up Radio Archive 2 Abstract Independent" and "dream of a system where [retrieval is easier]" (Silva). Pop Up Radio Archive is a free, open

  20. NATIONAL RADIO ASTRONOMY OBSERVATORY CHARLOTTESVILLE, VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    of operating 135 cryogenic receivers on the VIA. First, a review of recent progress in cryogenically-cooled have been developed for use in a new radio astronomy system [1]. This new system is called the Very other frequencies utilize HEMT amplifiers cooled to 13 K in separate dewars at the Cassegrain focus

  1. Barrier Immune Radio Communications for Demand Response

    E-Print Network [OSTI]

    LBNL-2294E Barrier Immune Radio Communications for Demand Response F. Rubinstein, G. Ghatikar, J Ann Piette of Lawrence Berkeley National Laboratory's (LBNL) Demand Response Research Center (DRRC and Environment's (CIEE) Demand Response Emerging Technologies Development (DRETD) Program, under Work for Others

  2. Angular clustering in the SUMSS radio survey

    E-Print Network [OSTI]

    Chris Blake; Tom Mauch; Elaine M. Sadler

    2003-10-05T23:59:59.000Z

    We measure the angular correlation function of radio galaxies selected by the 843 MHz Sydney University Molonglo Sky Survey (SUMSS). We find that the characteristic imprint of large-scale structure is clearly detectable, and that the survey is very uniform. Through comparison with similar analyses for other wide-area radio surveys - the 1400 MHz NRAO VLA Sky Survey (NVSS) and the 325 MHz Westerbork Northern Sky Survey (WENSS) - we are able to derive consistent angular clustering parameters, including a steep slope for the clustering function, $w(\\theta) \\propto \\theta^{-1.1}$. We revise upwards previous estimates of the NVSS clustering amplitude, and find no evidence for dependence of clustering properties on radio frequency. It is important to incorporate the full covariance matrix when fitting parameters to the measured correlation function. Once the redshift distribution for mJy radio galaxies has been determined, these projected clustering measurements will permit a robust description of large-scale structure at $z \\sim 0.8$, the median redshift of the sources.

  3. RADIO EMISSION OF SOLAR FLARE PARTICLE ACCELERATION

    E-Print Network [OSTI]

    RADIO EMISSION OF SOLAR FLARE PARTICLE ACCELERATION A. O. Benz Abstract The solar corona is a very be considered as a particle accelerator. The free mobility of charged particles in a dilute plasma to accelerate particles in resonance. From a plasma physics point of view, acceleration is not surprising

  4. Special set linear algebra and special set fuzzy linear algebra

    E-Print Network [OSTI]

    W. B. Vasantha Kandasamy; Florentin Smarandache; K. Ilanthenral

    2009-12-30T23:59:59.000Z

    The authors in this book introduce the notion of special set linear algebra and special set fuzzy Linear algebra, which is an extension of the notion set linear algebra and set fuzzy linear algebra. These concepts are best suited in the application of multi expert models and cryptology. This book has five chapters. In chapter one the basic concepts about set linear algebra is given in order to make this book a self contained one. The notion of special set linear algebra and their fuzzy analogue is introduced in chapter two. In chapter three the notion of special set semigroup linear algebra is introduced. The concept of special set n-vector spaces, n greater than or equal to three is defined and their fuzzy analogue is their fuzzy analogue is given in chapter four. The probable applications are also mentioned. The final chapter suggests 66 problems.

  5. Distant FR I radio galaxies in the Hubble Deep Field: implications for the cosmological evolution of radio-loud AGN

    E-Print Network [OSTI]

    Best, Philip

    Distant FR I radio galaxies in the Hubble Deep Field: implications for the cosmological evolution of radio-loud AGN I. A. G. SnellenP and P. N. Best Institute for Astronomy, Royal Observatory, Blackford S T R AC T Deep and high-resolution radio observations of the Hubble Deep Field and flanking fields have

  6. Set Linear Algebra and Set Fuzzy Linear Algebra

    E-Print Network [OSTI]

    W. B. Vasantha Kandasamy; Florentin Smarandache; K. Ilanthenral

    2008-06-17T23:59:59.000Z

    In this book, the authors define the new notion of set vector spaces which is the most generalized form of vector spaces. Set vector spaces make use of the least number of algebraic operations, therefore, even a non-mathematician is comfortable working with it. It is with the passage of time, that we can think of set linear algebras as a paradigm shift from linear algebras. Here, the authors have also given the fuzzy parallels of these new classes of set linear algebras. This book is divided into seven chapters. The first chapter briefly recalls some of the basic concepts in order to make this book self-contained. Chapter two introduces the notion of set vector spaces which is the most generalized concept of vector spaces. Set vector spaces lends itself to define new classes of vector spaces like semigroup vector spaces and group vector spaces. These are also generalization of vector spaces. The fuzzy analogue of these concepts are given in Chapter three. In Chapter four, set vector spaces are generalized to biset bivector spaces and not set vector spaces. This is done taking into account the advanced information technology age in which we live. As mathematicians, we have to realize that our computer-dominated world needs special types of sets and algebraic structures. Set n-vector spaces and their generalizations are carried out in Chapter five. Fuzzy n-set vector spaces are introduced in the sixth chapter. The seventh chapter suggests more than three hundred problems.

  7. Radio-loud Narrow-Line Type 1 Quasars

    E-Print Network [OSTI]

    S. Komossa; W. Voges; D. Xu; S. Mathur; H. -M. Adorf; G. Lemson; W. Duschl; D. Grupe

    2006-03-24T23:59:59.000Z

    We present the first systematic study of (non-radio-selected) radio-loud narrow-line Seyfert 1 (NLS1) galaxies. Cross-correlation of the `Catalogue of Quasars and Active Nuclei' with several radio and optical catalogues led to the identification of 11 radio-loud NLS1 candidates including 4 previously known ones. Most of the radio-loud NLS1s are compact, steep spectrum sources accreting close to, or above, the Eddington limit. The radio-loud NLS1s of our sample are remarkable in that they occupy a previously rarely populated regime in NLS1 multi-wavelength parameter space. While their [OIII]/H_beta and FeII/H_beta intensity ratios almost cover the whole range observed in NLS1 galaxies, their radio properties extend the range of radio-loud objects to those with small widths of the broad Balmer lines. Among the radio-detected NLS1 galaxies, the radio index R distributes quite smoothly up to the critical value of R ~ 10 and covers about 4 orders of magnitude in total. Statistics show that ~7% of the NLS1 galaxies are formally radio-loud while only 2.5% exceed a radio index R > 100. Several mechanisms are considered as explanations for the radio loudness of the NLS1 galaxies and for the lower frequency of radio-louds among NLS1s than quasars. While properties of most sources (with 2-3 exceptions) generally do not favor relativistic beaming, the combination of accretion mode and spin may explain the observations. (abbreviated)

  8. A priori degeneracy of one-dimensional rotation sets for periodic point free torus

    E-Print Network [OSTI]

    Kwapisz, Jaroslaw

    -dimensionalCartesian space Rd by translations; the translation by v 2 Zd is denoted by Tv : Rd ! Rd. The quotient Td := Rd) be the space of all such maps and Di 0(Rd) be the space of their lifts to Rd. We 1Partially supported by NSF : R2 ! R2 that are Z2-equivariant (i.e. ~f Tv = Tv ~f for all v 2 Z2). The maps in Di 0(T2

  9. Detecting Radio Emission from Cosmic Ray Air Showers and Neutrinos with a Digital Radio Telescope

    E-Print Network [OSTI]

    Heino Falcke; Peter Gorham

    2002-07-10T23:59:59.000Z

    We discuss the possibilities of measuring ultra-high energy cosmic rays and neutrinos with radio techniques. We review a few of the properties of radio emission from cosmic ray air showers and show how these properties can be explained by coherent ``geosynchrotron'' emission from electron-positron pairs in the shower as they move through the geomagnetic field. This should allow one to use the radio emission as a useful diagnostic tool for cosmic ray research. A new generation of digital telescopes will make it possible to study this radio emission in greater detail. For example, the planned Low-Frequency Array (LOFAR), operating at 10-200 MHz, will be an instrument uniquely suited to study extensive air showers and even detect neutrino-induced showers on the moon. We discuss sensitivities, count rates and possible detection algorithms for LOFAR and a currently funded prototype station LOPES. This should also be applicable to other future digital radio telescopes such as the Square-Kilometer-Array (SKA). LOFAR will be capable of detecting air-shower radio emission from >2*10^14 eV to ~10^20 eV. The technique could be easily extended to include air shower arrays consisting of particle detectors (KASCADE, Auger), thus providing crucial additional information for obtaining energy and chemical composition of cosmic rays. It also has the potential to extend the cosmic ray search well beyond an energy of 10^21 eV if isotropic radio signatures can be found. Other issues that LOFAR can address are to determine the neutral component of the cosmic ray spectrum, possibly look for neutron bursts, and do actual cosmic ray astronomy.

  10. Addendum to "Coherent radio pulses from GEANT generated electromagnetic showers in ice"

    E-Print Network [OSTI]

    S. Razzaque; S. Seunarine; S. Chambers; D. Besson; D. McKay; J. Ralston; D. Seckel

    2003-06-13T23:59:59.000Z

    We reevaluate our published calculations of electromagnetic showers generated by GEANT 3.21 and the radio frequency pulses they produce in ice. We are prompted by a recent report showing that GEANT 3.21-modeled showers are sensitive to internal settings in the electron tracking subroutine. We report the shower and pulse characteristics obtained with different settings of GEANT 3.21 and with GEANT 4. The default setting of electron tracking in GEANT 3.21 we used in previous work speeds up the shower simulation at the cost of information near the end of the tracks. We find that settings tracking electron and positron to lower energy yield a more accurate calculation, a more intense shower, and proportionately stronger radio pulses at low frequencies. At high frequencies the relation between shower tracking algorithm and pulse spectrum is more complex. We obtain radial distributions of shower particles and phase distributions of pulses from 100 GeV showers that are consistent with our published results.

  11. Dynamics in the Category Set

    E-Print Network [OSTI]

    Elemer E Rosinger

    2010-04-09T23:59:59.000Z

    What makes sets, or more precisely, the category {\\bf Set} important in Mathematics are the well known {\\it two} specific ways in which arbitrary mappings $f : X \\longrightarrow Y$ between any two sets $X, Y$ can {\\it fail} to be bijections. Namely, they can fail to be injective, and/or to be surjective. As for bijective mappings they are rather trivial, since with some relabeling of their domains or ranges, they simply become permutations, or even identity mappings. \\\\ To the above, one may add the {\\it third} property of sets, namely that, between any two nonvoid sets there exist mappings. \\\\ These three properties turn out to be at the root of much of the interest which the category {\\bf Set} has in Mathematics. Specifically, these properties create a certain {\\it dynamics}, or for that matter, lack of it, on the level of the category {\\bf Set} and of some of its subcategories.

  12. YOUNG RADIO PULSARS IN GALACTIC GLOBULAR CLUSTERS

    SciTech Connect (OSTI)

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

    2011-11-20T23:59:59.000Z

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

  13. Radio frequency (RF) heated supersonic flow laboratory

    SciTech Connect (OSTI)

    Wantuck, P.; Watanabe, H.

    1990-01-01T23:59:59.000Z

    A unique supersonic flow apparatus which employs an inductively-coupled, radio frequency (RF) torch to supply high enthalpy source gas to the nozzle inlet is described. The main features of this system are the plasma tube, a cooled nozzle assembly, and a combustion/expansion chamber with a heat exchanger. A description of these components with current test data is presented. In addition, a discussion of anticipated experiments utilizing this system is included.

  14. SPITZER OBSERVATIONS OF HOTSPOTS IN RADIO LOBES

    SciTech Connect (OSTI)

    Werner, Michael W.; Murphy, David W.; Livingston, John H.; Gorjian, Varoujan; Jones, Dayton L.; Meier, David L.; Lawrence, Charles R. [Jet Propulsion Laboratory, 4800 Oak Grove Drive, Pasadena, CA 91109 (United States)

    2012-11-10T23:59:59.000Z

    We have carried out a systematic search with Spitzer Warm Mission and archival data for infrared emission from the hotspots in radio lobes that have been described by Hardcastle et al. These hotspots have been detected with both radio and X-ray observations, but an observation at an intermediate frequency in the infrared can be critical to distinguish between competing models for particle acceleration and radiation processes in these objects. Between the archival and warm mission data, we report detections of 18 hotspots; the archival data generally include detections at all four IRAC bands, the Warm Mission data only at 3.6 {mu}m. Using a theoretical formalism adopted from Godfrey et al., we fit both archival and warm mission spectral energy distributions (SEDs)-including radio, X-ray, and optical data from Hardcastle as well as the Spitzer data-with a synchrotron self-Compton (SSC) model, in which the X-rays are produced by Compton scattering of the radio frequency photons by the energetic electrons which radiate them. With one exception, an SSC model requires that the magnetic field be less or much less than the equipartition value which minimizes total energy and has comparable amounts of energy in the magnetic field and in the energetic particles. This conclusion agrees with those of comparable recent studies of hotspots, and with the analysis presented by Hardcastle et al. We also show that the infrared data rule out the simplest synchrotron-only models for the SEDs. We briefly discuss the implications of these results and of alternate interpretations of the data.

  15. Chautauqua notebook: appropriate technology on radio

    SciTech Connect (OSTI)

    Renz, B.

    1981-01-01T23:59:59.000Z

    Experiences in establishing and maintaining a regional call-in information-exchange radio show (Chautauqua) on energy conservation, appropriate technology, renewable energy sources, and self-reliance are discussed. Information is presented on: appropriate technology; the Chautauquaa concept; topics discussed; research performed; guests; interviewing tips; types of listeners; program features; where to find help; promotion and publicity; the technical and engineering aspects; the budget and funding; and station policies. (MCW)

  16. Detecting Radio Emission from Cosmic Ray Air Showers and Neutrinos with a Digital Radio Telescope

    E-Print Network [OSTI]

    Falcke, H; Falcke, Heino; Gorham, Peter

    2003-01-01T23:59:59.000Z

    We discuss the possibilities of measuring ultra-high energy cosmic rays and neutrinos with radio techniques. We review a few of the properties of radio emission from cosmic ray air showers and show how these properties can be explained by coherent ``geosynchrotron'' emission from electron-positron pairs in the shower as they move through the geomagnetic field. This should allow one to use the radio emission as a useful diagnostic tool for cosmic ray research. A new generation of digital telescopes will make it possible to study this radio emission in greater detail. For example, the planned Low-Frequency Array (LOFAR), operating at 10-200 MHz, will be an instrument uniquely suited to study extensive air showers and even detect neutrino-induced showers on the moon. We discuss sensitivities, count rates and possible detection algorithms for LOFAR and a currently funded prototype station LOPES. This should also be applicable to other future digital radio telescopes such as the Square-Kilometer-Array (SKA). LOFAR...

  17. SIMULTANEOUS X-RAY AND RADIO OBSERVATIONS OF ROTATING RADIO TRANSIENT J1819-1458

    SciTech Connect (OSTI)

    Miller, J. J.; McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); Rea, N. [Institut de Ciències de l'Espai (IEEC-CSIC) Campus UAB, Fac. de Ciències, Torre C5, parell, 2a planta, E-08193 Barcelona (Spain); Lazaridis, K.; Keane, E. F.; Kramer, M. [Max Planck Institut für Radioastronomie, Auf dem Hügel 69, D-53121 Bonn (Germany); Lyne, A. [Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Manchester M13 9PL (United Kingdom)

    2013-10-20T23:59:59.000Z

    We present the results of simultaneous radio and X-ray observations of PSR J1819–1458. Our 94 ks XMM-Newton observation of the high magnetic field (?5 × 10{sup 13} G) pulsar reveals a blackbody spectrum (kT ? 130 eV) with a broad absorption feature, possibly composed of two lines at ?1.0 and ?1.3 keV. We performed a correlation analysis of the X-ray photons with radio pulses detected in 16.2 hr of simultaneous observations at 1-2 GHz with the Green Bank, Effelsberg, and Parkes telescopes, respectively. Both the detected X-ray photons and radio pulses appear to be randomly distributed in time. We find tentative evidence for a correlation between the detected radio pulses and X-ray photons on timescales of less than 10 pulsar spin periods, with the probability of this occurring by chance being 0.46%. This suggests that the physical process producing the radio pulses may also heat the polar-cap.

  18. DIFFUSE RADIO EMISSION IN ABELL 754

    SciTech Connect (OSTI)

    Kale, Ruta; Dwarakanath, K. S. [Raman Research Institute, Bangalore 560080 (India)], E-mail: ruta@rri.res.in, E-mail: dwaraka@rri.res.in

    2009-07-10T23:59:59.000Z

    We present a low-frequency study of the diffuse radio emission in the galaxy cluster A754. We present a new 150 MHz image of the galaxy cluster A754 made with the Giant Metrewave Radio Telescope and discuss the detection of four diffuse features. We compare the 150 MHz image with the images at 74, 330, and 1363 MHz; one new diffuse feature is detected. The flux density upper limits at 330 and 1363 MHz imply a synchrotron spectral index, {alpha}>2 (S {proportional_to} {nu}{sup -{alpha}}), for the new feature. The 'west relic' detected at 74 MHz is not detected at 150 MHz and is thus consistent with its nondetection at 1363 MHz and 330 MHz. Integrated spectra of all the diffuse features are presented. The fourth diffuse feature is located along the proposed merger axis in A754 and 0.7 Mpc away from the peak of X-ray emission; we refer to it as a relic. We have made use of the framework of the adiabatic compression model to obtain spectra. We show that the spectrum of the fourth diffuse feature is consistent with that of a cocoon of a radio galaxy lurking for about 9 x 10{sup 7} yr; no shock compression is required. The other three diffuse emission have spectra steeper than 1.5 and could be cocoons lurking for longer time. We discuss other possibilities such as shocks and turbulent reacceleration being responsible for the diffuse emission in A754.

  19. GENERALIZED SUPPORT SET INVARIANCY SENSITIVITY ...

    E-Print Network [OSTI]

    2005-05-16T23:59:59.000Z

    CQO problems by focusing on the support set of slack variables in dual optimal solutions. ... resources in storage as he had before.” Meanwhile, the manager ...

  20. Set the PACE St. Louis

    Broader source: Energy.gov [DOE]

    Commercial property owners, community associations (e.g., Home Owners Associations), and some residential property owners are eligible for Set the PACE St. Louis. Currently, only residential prop...

  1. SHM Data Sets and Software

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

    Sets and Software Contact Institute Director Charles Farrar (505) 663-5330 Email UCSD EI Director Michael Todd (858) 534-5951 Professional Staff Assistant Jutta Kayser (505)...

  2. LONG-TERM CALIBRATION STABILITY OF A RADIO ASTRONOMICAL PHASED ARRAY FEED

    SciTech Connect (OSTI)

    Elmer, Michael; Jeffs, Brian D.; Warnick, Karl F. [Department of Electrical and Computer Engineering, Brigham Young University, Provo, UT 84602 (United States)

    2013-01-01T23:59:59.000Z

    There are many challenges associated with the implementation of a phased array feed for radio astronomy applications. Among these is the need to have an adequate set of calibration measurements so that reliable beamformers can be computed. Changes in the operating environment and temporal gain drift in the electronics contribute to calibration drift, which affects the beamformer performance. We will show that calibration measurements are relatively stable over a 5 day period and may remain so for up to 70 days or longer. We have incorporated the use of a calibration update system that has the potential to refresh a set of old calibrators, specifically correcting for electronic gain drift. However, the long-term variations that are present with fresh, current calibrators are greater than the degradation due to using an old calibration set, suggesting that, at this time, there is not a need for sophisticated calibration update systems or algorithms.

  3. GNU Radio Group Final Research Report Thomas Bell Kevin Gajewski Anthony Hsu

    E-Print Network [OSTI]

    Yu, Chansu

    GNU Radio Group Final Research Report Thomas Bell Kevin Gajewski Anthony Hsu Advisors: Yu-Dong Yao, the once only theoretical concept of Software-Defined Radio is now a practical reality. Using an open source software-defined radio package called GNU Radio and a basic radio hardware component called

  4. An accretion disk and radio spectra of pulsars

    E-Print Network [OSTI]

    F. V. Prigara

    2003-07-25T23:59:59.000Z

    On the basis of the unified model of compact radio sources, the dependence of a turnover frequency in the smoothed radio spectrum of a pulsar upon the ratio of the dispersion measure to the period of a pulsar is obtained. This relation is produced by the radial density wave in the accretion disk surrounding a pulsar. The unified model of compact radio sources gives also the smoothed spectral indices of radio emission from pulsars as $\\alpha=2$ for the gaseous disk with the temperature profile T=const and $\\alpha=3$ for the gaseous disk with the pressure profile P=const ($F_{\

  5. TWO POPULATIONS OF GAMMA-RAY BURST RADIO AFTERGLOWS

    SciTech Connect (OSTI)

    Hancock, P. J.; Gaensler, B. M.; Murphy, T., E-mail: Paul.Hancock@Sydney.edu.au [Also at Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO), The University of Sydney, Sydney, NSW 2006, Australia. (Australia)

    2013-10-20T23:59:59.000Z

    The detection rate of gamma-ray burst (GRB) afterglows is ?30% at radio wavelengths, much lower than in the X-ray (?95%) or optical (?70%) bands. The cause of this low radio detection rate has previously been attributed to limited observing sensitivity. We use visibility stacking to test this idea, and conclude that the low detection rate is instead due to two intrinsically different populations of GRBs: radio-bright and radio-faint. We calculate that no more than 70% of GRB afterglows are truly radio-bright, leaving a significant population of GRBs that lack a radio afterglow. These radio-bright GRBs have higher gamma-ray fluence, isotropic energies, X-ray fluxes, and optical fluxes than the radio-faint GRBs, thus confirming the existence of two physically distinct populations. We suggest that the gamma-ray efficiency of the prompt emission is responsible for the difference between the two populations. We also discuss the implications for future radio and optical surveys.

  6. Underground radio technology saves miners and emergency response...

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

    and tunnel radios use magnetic induction, advanced digital communications techniques and ultra-low frequency transmission to wirelessly provide reliable 2-way voice, text, or data...

  7. COLLOQUIUM: Type II Solar Radio Bursts: From Fundamental Plasma...

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

    Auditorium COLLOQUIUM: Type II Solar Radio Bursts: From Fundamental Plasma Physics to Space Weather Research Professor Iver Cairns University of Sydney - School of Physics For...

  8. Speaker Recognition The A TVS-UAM System at NIST SRE 05

    E-Print Network [OSTI]

    Autonoma de Madrid, Universidad

    -Castro, Doroteo Torre Toledano, Alberto Montero-Asenjo, Javier Gonzalez-Dominguez, Ignacio Lopez-Moreno, Julian, there was Author's Current Address- J. Gonzalez-Rodriguez, D. Ramnos-Castro, D.Torre Toledano. A. Montero-Asenjo. J

  9. analysis involving tvs-m: Topics by E-print Network

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

    GEOSYNTHETICS Engineering Websites Summary: failure involving a reinforced geosynthetic clay liner in a sedimentation pond at a waste containment liners to hydrate during on-site...

  10. 44 Short stories told on the local radio (Kap York Radio)

    E-Print Network [OSTI]

    Leonard, Stephen Pax

    last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name Stephen Leonard Tape No. / Track / Item No. 44 Length of track 2 hours 45 minutes Title of track Short stories told on the local radio (Kap...

  11. A Survey of Kiloparsec-Scale Radio Outflows in Radio-Quiet Active Galactic Nuclei

    E-Print Network [OSTI]

    J. F. Gallimore; D. J. Axon; C. P. O'Dea; S. A. Baum; A. Pedlar

    2006-04-10T23:59:59.000Z

    Seyfert galaxies commonly host compact jets spanning 10-100 pc scales, but larger structures (KSRs) are resolved out in long baseline, aperture synthesis surveys. We report a new, short baseline Very Large Array (VLA) survey of a complete sample of Seyfert and LINER galaxies. Out of all of the surveyed radio-quiet sources, we find that 44% (19 / 43) show extended radio structures at least 1 kpc in total extent that do not match the morphology of the disk or its associated star-forming regions. The KSR Seyferts stand out by deviating significantly from the far-infrared - radio correlation for star-forming galaxies, and they are more likely to have a relatively luminous, compact radio source in the nucleus; these results argue that KSRs are powered by the AGN rather than starburst. KSRs probably originate from jet plasma that has been decelerated by interaction with the nuclear ISM. We demonstrate the jet loses virtually all of its power to the ISM within the inner kiloparsec to form the slow KSRs.

  12. RADIO CONTROL CRICKET V2.0

    E-Print Network [OSTI]

    5 5 4 4 3 3 2 2 1 1 D D C C B B A A PCLK PDATA PALE RADIO DATA SPI_SCK SPI_MOSI SPI_MISO CHP_SCK PCLK PDATA PALE ADC0 SPI_MISO CHP_OUT RF_DETECT AVCC AVCC VCC VCC AVCC VCC AVCC VCC VCC VCC J9 HDR 2 X AVCC AVCC AVCC AVCC RF_IN RF_OUT L1 L2 CHP_OUT R_BIAS XOSC1 XOSC2 DIO DCLK PCLK PDATA PALE RSSI C18 R13

  13. High efficiency, oxidation resistant radio frequency susceptor

    DOE Patents [OSTI]

    Besmann, Theodore M.; Klett, James W.

    2004-10-26T23:59:59.000Z

    An article and method of producing an article for converting energy from one form to another having a pitch-derived graphitic foam carbon foam substrate and a single layer coating applied to all exposed surfaces wherein the coating is either silicon carbide or carbides formed from a Group IVA metal. The article is used as fully coated carbon foam susceptors that more effectively absorb radio frequency (RF) band energy and more effectively convert the RF energy into thermal band energy or sensible heat. The essentially non-permeable coatings also serve as corrosion or oxidation resistant barriers.

  14. UHECRs from the Radio Lobes of AGNs

    E-Print Network [OSTI]

    F. Fraschetti; F. Melia

    2008-10-07T23:59:59.000Z

    We report a stochastic mechanism of particle acceleration from first principles in an environment having properties like those of Radio Lobes in AGNs. We show that energies $\\sim 10^{20}$ eV are reached in $\\sim 10^6$ years for protons. Our results reopen the question regarding the nature of the high-energy cutoff in the observed spectrum: whether it is due solely to propagation effects, or whether it is also affected by the maximum energy permitted by the acceleration process itself.

  15. Revealing Cosmic Magnetism with Radio Polarimetry

    E-Print Network [OSTI]

    Bryan M. Gaensler

    2007-12-18T23:59:59.000Z

    While gravitation sustains the on-going evolution of the cosmos, it is magnetism that breaks gravity's symmetry and that provides the pathway to the non-thermal Universe. By enabling processes such as anisotropic pressure support, particle acceleration, and jet collimation, magnetism has for billions of years regulated the feedback vital for returning matter to the interstellar and intergalactic medium. After reviewing recent results that demonstrate the unique view of magnetic fields provided by radio astronomy, I explain how the Square Kilometre Array will provide data that will reveal what cosmic magnets look like, how they formed, and what role they have played in the evolving Universe.

  16. CXAllenRadioTower2.pdf

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOE Office511041clothAdvanced Materials Advanced. C o w l i t z C o . C l a r8.0 -CURRICULUM VITAEAllen Radio Tower

  17. Radio Towers Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f < RAPID‎ | Roadmap Jump to:b <RGS Development BVRadiantRadio

  18. Radio Observations of the Hubble Deep Field South Region IV: Optical Properties of the Faint Radio Population

    E-Print Network [OSTI]

    M. T. Huynh; C. A. Jackson; R. P. Norris; A. Fernandez-Soto

    2008-03-31T23:59:59.000Z

    The Australia Telescope Hubble Deep Field-South (ATHDFS) survey of the Hubble Deep Field South reaches sensitivities of ~10 miceoJyJy at 1.4, 2.5, 5.2 and 8.7 GHz, making the ATHDFS one of the deepest surveys ever performed with the Australia Telescope Compact Array. Here we present the optical identifications of the ATHDFS radio sources using data from the literature. We find that ~66% of the radio sources have optical counterparts to I = 23.5 mag. Deep HST imaging of the area identifies a further 12% of radio sources. We present new spectroscopic observations for 98 of the radio sources, and supplement these spectroscopic redshifts with photometric ones calculated from 5-band optical imaging. The host galaxy colors and radio-to-optical ratios indicate that low luminosity (or "radio quiet") AGN make up a significant proportion of the sub-mJy radio population, a result which is in accordance with a number of other deep radio studies. The radio-to-optical ratios of the bright (S_1.4GHz > 1 mJy) sources is consistent with a bimodal distribution.

  19. 3/11/13 9:17 AMResearcher says interest in zombies waxes, wanes to mirror societal dissatisfaction -The Washington Post Page 1 of 5http://www.washingtonpost.com/entertainment/tv/researcher-says-inte...faction/2013/03/11/8a5d0472-8a2e-11e2-a88e-461ffa2e34e

    E-Print Network [OSTI]

    Duchowski, Andrew T.

    - The Washington Post Page 1 of 5http://www.washingtonpost.com/entertainment/tv/researcher-says-inte...faction/2013 to mirror societal dissatisfaction - The Washington Post Page 2 of 5http://www.washingtonpost.com/entertainment/tv/researcher-says-inte...faction

  20. Robust Downlink Beamforming in Multiuser MISO Cognitive Radio Networks

    E-Print Network [OSTI]

    Gharavol, Ebrahim A; Mouthaan, Koenraad

    2009-01-01T23:59:59.000Z

    This paper studies the problem of robust downlink beamforming design in a multiuser Multi-Input Single-Output (MISO) Cognitive Radio Network (CR-Net) in which multiple Primary Users (PUs) coexist with multiple Secondary Users (SUs). Unlike conventional designs in CR-Nets, in this paper it is assumed that the Channel State Information (CSI) for all relevant channels is imperfectly known, and the imperfectness of the CSI is modeled using an Euclidean ball-shaped uncertainty set. Our design objective is to minimize the transmit power of the SU-Transmitter (SU-Tx) while simultaneously targeting a lower bound on the received Signal-to-Interference-plus-Noise-Ratio (SINR) for the SU's, and imposing an upper limit on the Interference-Power (IP) at the PUs. The design parameters at the SU-Tx are the beamforming weights, i.e. the precoder matrix. The proposed methodology is based on a worst case design scenario through which the performance metrics of the design are immune to variations in the channels. We propose thr...

  1. Radio frequency sheaths in an oblique magnetic field

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

    Myra, James R.; D'Ippolito, Daniel A.

    2015-06-01T23:59:59.000Z

    The physics of radio-frequency (rf) sheaths near a conducting surface is studied for plasmas immersed in a magnetic field that makes an oblique angle ? with the surface. A set of one-dimensional equations is developed that describe the dynamics of the time-dependent magnetic presheath and non-neutral Debye sheath. The model employs Maxwell-Boltzmann electrons, and the magnetization and mobility of the ions is determined by the magnetic field strength, and wave frequency, respectively. The angle, ? assumed to be large enough to insure an electron-poor sheath, is otherwise arbitrary. Concentrating on the ion-cyclotron range of frequencies, the equations are solved numericallymore »to obtain the rectified (dc) voltage, the rf voltage across the sheath and the rf current flowing through the sheath. As an application of this model, the sheath voltage-current relation is used to obtain the rf sheath impedance, which in turn gives an rf sheath boundary condition for the electric field at the sheath-plasma interface that can be used in rf wave codes. In general the impedance has both resistive and capacitive contributions, and generalizes previous sheath boundary condition models. The resistive part contributes to parasitic power dissipation at the wall.« less

  2. Background radio-frequency radiation and its impact on radio astronomy Michelle C. Storey, Bruce MacA Thomas and John M. Sarkissian

    E-Print Network [OSTI]

    Sarkissian, John M.

    1 Background radio-frequency radiation and its impact on radio astronomy Michelle C. Storey, Bruce 1710 Email:mstorey@atnf.csiro.au Abstract: The use of radio-frequency telecommunications equipment is dramatically increasing, and one consequence is that background levels of radio-frequency radiation

  3. Cognitive Radio: A path in the Evolution of Public Wireless Networks The concept of cognitive radio has arisen as a generalization of the principle of multiple

    E-Print Network [OSTI]

    Jafar, Syed A.

    Cognitive Radio: A path in the Evolution of Public Wireless Networks The concept of cognitive radio has arisen as a generalization of the principle of multiple access in radio channels initially layer including fixed modulation and error control coding algorithms. The cognitive radio is supposed

  4. A big wet kiss?, A barrel of laughs? : the 2000 presidential election TV talk show interviews with the candidates

    E-Print Network [OSTI]

    Osborn, Barbara

    2006-01-01T23:59:59.000Z

    know that I said he was a boob? [CUT TO BURNETT OFF SET]I just play dumb on the boob thing? BURNETT: I wouldn’tthat I’ve morphed from a boob to a dweeb. LAUGHTER

  5. Polyhedral Methods for Positive Dimensional Solution Sets Danko Adrovic and Jan Verschelde

    E-Print Network [OSTI]

    Adrovic, Danko

    , Hannah Markwig, Thomas Markwig: An Algorithm for Lifting Points in a Tropical Variety. Collect. Math. vol Let V = (v1, v2, . . . , vn) be a pretropism, wi > 0, bi , ci C: G(x, t) = x1 = tv1 (b1 + c1tw1 + . . . ) x2 = tv2 (b2 + c2tw2 +

  6. Radio-Frequency Beam Conditioner for Fast-Wave Free-Electron Generators of Coherent Radiation

    E-Print Network [OSTI]

    Sessler, Andrew M.

    2008-01-01T23:59:59.000Z

    to Physical Review Letters Radio-Frequency Beam ConditionerDE-AC03-76SF00098 LBL-31006 RADIO-FREQUENCY BEAM CONDITIONERIbaraki, 305, Japan. RADIO-FREQUENCY BEAM CONDITIONER FOR

  7. Demo Abstract: A Unified Architecture for Flexible Radio Power Management in Wireless Sensor Networks

    E-Print Network [OSTI]

    Lu, Chenyang

    Demo Abstract: A Unified Architecture for Flexible Radio Power Management in Wireless Sensor Terms Experimentation, Design Keywords Wireless Sensor Networks, Radio Power Management, Architecture, Framework 1 Overview Radio power management is of paramount concern in wireless sensor networks. While

  8. US researchers make tiny radio from 11:05AM Tuesday January 29, 2008

    E-Print Network [OSTI]

    Rogers, John A.

    the radios. They consist of two radio frequency amplifiers, a radio frequency mixer and an audio amplifier ©2008, APN Holdings NZ Limited Served by: Laurel Instance: static | 04 Feb 2008 05:36:27 | 1,877 Page 2

  9. Quark Nova Model for Fast Radio Bursts

    E-Print Network [OSTI]

    Zachary Shand; Amir Ouyed; Nico Koning; Rachid Ouyed

    2015-05-29T23:59:59.000Z

    FRBs are puzzling, millisecond, energetic radio transients with no discernible source; observations show no counterparts in other frequency bands. The birth of a quark star from a parent neutron star experiencing a quark nova - previously thought undetectable when born in isolation - provides a natural explanation for the emission characteristics of FRBs. The generation of unstable r-process elements in the quark nova ejecta provides millisecond exponential injection of electrons into the surrounding strong magnetic field at the parent neutron star's light cylinder via $\\beta$-decay. This radio synchrotron emission has a total duration of hundreds of milliseconds and matches the observed spectrum while reducing the inferred dispersion measure by approximately 200 cm$^{-3}$ pc. The model allows indirect measurement of neutron star magnetic fields and periods in addition to providing astronomical measurements of $\\beta$-decay chains of unstable neutron rich nuclei. Using this model, we can calculate expected FRB average energies ($\\sim$ 10$^{41}$ ergs), spectra shapes and provide a theoretical framework for determining distances.

  10. On the Nature of Pulsar Radio Emission

    E-Print Network [OSTI]

    Lyutikov, M; Machabeli, G Z; Lyutikov, Maxim; Blandford, Roger D.; Machabeli, George

    1998-01-01T23:59:59.000Z

    A theory of pulsar radio emission generation, in which the observed waves are produced directly by maser-type plasma instabilities operating at the anomalous cyclotron-Cherenkov resonance $\\omega- k_{\\parallel} v_{\\parallel} + \\omega_B/ v_{\\parallel} - k_{\\perp} u_d =0$, is capable of explaining the main observational characteristics of pulsar radio emission. The instabilities are due to the interaction of the fast particles from the primary beam and the tail of the distribution with the normal modes of a strongly magnetized one-dimensional electron-positron plasma. The waves emitted at these resonances are vacuum-like, electromagnetic waves that may leave the magnetosphere directly. In this model, the cyclotron-Cherenkov instability is responsible for core emission pattern and the Cherenkov-drift instability produces conal emission. The conditions for the development of the cyclotron-Cherenkov instability are satisfied for both typical and millisecond pulsars provided that the streaming energy of the bulk pl...

  11. The First Steps of Radio Astronomy in Czestochowa

    E-Print Network [OSTI]

    M. Jarosik; S. Starzynski; M. Szczesniak; R. Szczesniak; A. Ceglarek

    2007-12-10T23:59:59.000Z

    In the paper, technical documentation and the principle of operation is presented. "KLAUDIA" radio telescope was built in Rabka in 2007 and it is used to receive secondary radio waves, emitted by the Earth's ionosphere at frequency of 40 kHz.

  12. Intranight optical variability of radio-quiet BL Lacertae objects

    E-Print Network [OSTI]

    Liu, Yuan; Zhang, Shuang Nan

    2015-01-01T23:59:59.000Z

    Aims: The intranight variation (or microvariation) is a common phenomenon of radio-loud BL Lac objects. However, it is not clear whether the recently found radio-quiet BL Lac objects have the same properties. The occurrence rate of intranight variation is helpful in distinguishing the mechanism of the continuum of radio-quiet BL Lac objects. Methods: We conducted a photometric monitoring of 8 radio-quiet BL Lac objects by Xinglong 2.16m and Lijiang 2.4m telescopes. The differential light curves are calculated between each target and two comparison stars. To qualify the variation, the significance of variation is examined by scaled $F$-test. Results: No significant variation is found in the 11 sessions of light curves of 8 radio-quiet BL Lac objects (one galactic source is excluded). The lack of microvariation in radio-quiet BL Lac objects is consistent with the detection rate of microvariation in normal radio-quiet AGNs, but much lower than that of radio-loud AGNs. This result indicates that the continua of t...

  13. Real-time MISO UWB Radio Testbed and Waveform Design

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Real-time MISO UWB Radio Testbed and Waveform Design Yu Song, Zhen Hu, Nan Guo, and Robert C. Qiu-input single-output (MISO) ultra-wideband (UWB) radio testbed, which involves Xinlix Virtex-5 Field in indoor environment. The transmitted MISO signals are optimized in the passband with a bandwidth up to 500

  14. NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK, WEST VIRGINIA ELECTRONICS DIVISION INTERNAL REPORT and Ionospheric Center, Arecibo, Puerto Rico by the National Radio Astronomy Observatory at Green Bank, West Virginia. The general design concept was taken from previous receivers assembled at NRAO. S. Weinreb and N

  15. NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK ) WEST VIRGINIA

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY GREEN BANK ) WEST VIRGINIA ELECTRONICS DIVISION INTERNAL REPORT No. 159 INTERFERENCE POTENTIAL FOR RADIO ASTRONOMY OBSERVATIONS AT GREEN BANK, WEST VIRGINIA CRAIG ASTRONOMY OBSERVATIONS AT GREEN BANK, WEST VIRGINIA Craig R. Moore and James L. Dolan Introduction

  16. NATIONAL RADIO ASTRONOMY OBSERVATORY Green, Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green, Bank, West Virginia Electronics Division Internal Rep preformed by the Standard Receiver Section of the National Radio Astronomy Observatory at Green Bank, West Virginia. The following breakdown was used to divide the costs into various categories: (1) Emckajs.c1 . 1

  17. Soft Sensing and Optimal Power Control for Cognitive Radio

    E-Print Network [OSTI]

    Jafar, Syed A.

    1 Soft Sensing and Optimal Power Control for Cognitive Radio Sudhir Srinivasa and Syed Ali Jafar being present increases. We find that that power control that maximizes the SNR is binary, i transmit power constraint at the secondary radio, both the SNR and capacity optimal power control schemes

  18. Simultaneous Operation of Multiple Collocated Radios and the Scanning Problem

    E-Print Network [OSTI]

    Barbeau, Michel

    Simultaneous Operation of Multiple Collocated Radios and the Scanning Problem Michel Barbeau. The radio interface scans channels to uncover beacons periodically sent by transmitters. The goal of the scanning activity is to uncover the beacons within the shortest possible time. We call this the scanning

  19. Radio-Frequency Rectification on Membrane Bound Pores

    E-Print Network [OSTI]

    Sujatha Ramachandran; Robert H. Blick; Daniel W. van der Weide

    2007-09-12T23:59:59.000Z

    We present measurements on direct radio-frequency pumping of ion channels and pores bound in bilipid membranes. We make use of newly developed microcoaxes, which allow delivering the high frequency signal in close proximity to the membrane bound proteins and ion channels. We find rectification of the radio-frequency signal, which is used to pump ions through the channels and pores.

  20. Negotiating Multichannel Sensing and Access In Cognitive Radio Wireless Networks

    E-Print Network [OSTI]

    Islam, M. Saif

    Negotiating Multichannel Sensing and Access In Cognitive Radio Wireless Networks Hua Liu§, Bhaskar the coordination among secondary users on channel sensing strategy in cognitive wireless networks. In this problem and potentially access in a cognitive radio network? If users may have a potentially different valuation of each

  1. Ultra-Low Power Time Synchronization Using Passive Radio Receivers

    E-Print Network [OSTI]

    Amir, Yair

    Ultra-Low Power Time Synchronization Using Passive Radio Receivers Yin Chen Qiang Wang Marcus Chang. In this pa- per, we present an inexpensive and ultra-low power ( of elapsed seconds. The universal time sig- nal receiver combines an off-the-shelf radio chip with an ultra-low

  2. EnergyEfficient Initialization Protocols for Adhoc Radio Networks ?

    E-Print Network [OSTI]

    Nakano, Koji

    Energy­Efficient Initialization Protocols for Ad­hoc Radio Networks ? J. L. Bordim 1 , J. Cui 1 , T contribution of this work is to propose energy­ efficient randomized initialization protocols for ad­hoc radio this protocol to de­ sign an energy­efficient initialization protocol that terminates, with high probability

  3. CITY OF PRINCE GEORGE: RADIO FREQUENCY TREATMENT OF PARTIALLY

    E-Print Network [OSTI]

    #12;CITY OF PRINCE GEORGE: RADIO FREQUENCY TREATMENT OF PARTIALLY DIGESTED/DEWATERED BIOSOLIDS/DEWATERED BIOSOLIDS FINAL REPORT SUMMARY The City of Prince George recently proposed to investigate the possibility of applying radio frequency (RF) technology to partially digested/dewatered biosolids from domestic wastewater

  4. Orthogonal Exponential Spline Pulses with Application to Impulse Radio

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Federal Communications Commission and will potentially enable an impulse radio communica- tions system@mx.ibaraki.ac.jp Abstract: With application to the impulse radio communications in mind, a locally supported and zero properties are required (i) for the sake of real-time communications, (ii) for the pulse to be feasible

  5. argon radio-frequency glow: Topics by E-print Network

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

    Institute of Standards and Technology RFID is a form of automatic 6 Radio frequency ion source CERN Preprints Summary: The study on Radio Frequency Ion Source is mainly...

  6. Radio detection of cosmic ray air showers with LOPES

    E-Print Network [OSTI]

    Huege, T; Asch, T; Badea, A F; Bähren, L; Bekk, K; Bercuci, A; Bertaina, M; Biermann, P L; Blumer, J; Bozdog, H; Brancus, I M; Buitink, S; Bruggemann, M; Buchholz, P; Butcher, H; Chiavassa, A; Cossavella, F; Daumiller, K; Di Pierro, F; Doll, P; Engel, R; Falcke, H; Gemmeke, H; Ghia, P L; Glasstetter, R; Grupen, C; Hakenjos, A; Haungs, A; Heck, D; Hörandel, J R; Horneffer, A; Isar, P G; Kampert, K H; Kolotaev, Yu; Krömer, O; Kuijpers, J; Lafebre, S; Mathes, H J; Mayer, H J; Meurer, C; Milke, J; Mitrica, B; Morello, C; Navarra, G; Nehls, S; Nigl, A; Obenland, R; Oehlschläger, J; Ostapchenko, S; Over, S; Petcu, M; Petrovic, J; Pierog, T; Plewnia, S; Rebel, H; Risse, A; Roth, M; Schieler, H; Sima, O; Singh, K; Stumpert, M; Toma, G; Trinchero, G C; Ulrich, H; Van Buren, J; Walkowiak, W; Weindl, A; Wochele, J; Zabierowski, J; Zensus, J A; Zimmermann, D; Huege, Tim; al, et

    2006-01-01T23:59:59.000Z

    In the last few years, radio detection of cosmic ray air showers has experienced a true renaissance, becoming manifest in a number of new experiments and simulation efforts. In particular, the LOPES project has successfully implemented modern interferometric methods to measure the radio emission from extensive air showers. LOPES has confirmed that the emission is coherent and of geomagnetic origin, as expected by the geosynchrotron mechanism, and has demonstrated that a large scale application of the radio technique has great potential to complement current measurements of ultra-high energy cosmic rays. We describe the current status, most recent results and open questions regarding radio detection of cosmic rays and give an overview of ongoing research and development for an application of the radio technique in the framework of the Pierre Auger Observatory.

  7. Radio detection of cosmic ray air showers with LOPES

    E-Print Network [OSTI]

    Tim Huege; the LOPES Collaboration

    2006-09-15T23:59:59.000Z

    In the last few years, radio detection of cosmic ray air showers has experienced a true renaissance, becoming manifest in a number of new experiments and simulation efforts. In particular, the LOPES project has successfully implemented modern interferometric methods to measure the radio emission from extensive air showers. LOPES has confirmed that the emission is coherent and of geomagnetic origin, as expected by the geosynchrotron mechanism, and has demonstrated that a large scale application of the radio technique has great potential to complement current measurements of ultra-high energy cosmic rays. We describe the current status, most recent results and open questions regarding radio detection of cosmic rays and give an overview of ongoing research and development for an application of the radio technique in the framework of the Pierre Auger Observatory.

  8. Radio-AGN Feedback: When the Little Ones were Monsters

    E-Print Network [OSTI]

    Williams, W L

    2015-01-01T23:59:59.000Z

    We present a study of the evolution of the fraction of radio-loud active galactic nuclei (AGN) as a function of their host stellar mass. We make use of two samples of radio galaxies: one in the local universe, $0.01 10^{24}$ W/Hz at z ~ 1-2 while the radio-loud fraction for higher mass galaxies ($M_* > 10^{11.25}$ M$_{\\odot}$) remains the same. We argue that this increase is driven largely by the increase in cold or radiative mode accretion with increasing cold gas supply at earlier epochs. The increasing population of low mass Radio-Loud AGN can thus explain the upturn in the Radio Luminosity Function (RLF) at high redshift which is important for understanding the impact of AGN feedback in galaxy evolution.

  9. Predicting low-frequency radio fluxes of known extrasolar planets

    E-Print Network [OSTI]

    Grießmeier, J -M; Spreeuw, H

    2008-01-01T23:59:59.000Z

    Context. Close-in giant extrasolar planets (''Hot Jupiters'') are believed to be strong emitters in the decametric radio range. Aims. We present the expected characteristics of the low-frequency magnetospheric radio emission of all currently known extrasolar planets, including the maximum emission frequency and the expected radio flux. We also discuss the escape of exoplanetary radio emission from the vicinity of its source, which imposes additional constraints on detectability. Methods. We compare the different predictions obtained with all four existing analytical models for all currently known exoplanets. We also take care to use realistic values for all input parameters. Results. The four different models for planetary radio emission lead to very different results. The largest fluxes are found for the magnetic energy model, followed by the CME model and the kinetic energy model (for which our results are found to be much less optimistic than those of previous studies). The unipolar interaction model does ...

  10. MOS: A critical tool for current and future radio surveys

    E-Print Network [OSTI]

    Smith, Daniel J B

    2015-01-01T23:59:59.000Z

    Since radio continuum observations are not affected by dust obscuration, they are of immense potential diagnostic power as cosmological probes and for studying galaxy formation and evolution out to high redshifts. However, the power-law nature of radio frequency spectra ensures that ancillary spectroscopic information remains critical for studying the properties of the faint radio sources being detected in rapidly-increasing numbers on the pathway to the Square Kilometre Array. In this contribution, I present some of the key scientific motivations for exploiting the immense synergies between radio continuum observations and multi-object spectroscopic surveys. I review some of the ongoing efforts to obtain the spectra necessary to harness the huge numbers of star-forming galaxies and AGN that current and future radio surveys will detect. I also touch on the WEAVE-LOFAR survey, which will use the WEAVE spectrograph currently being built for the William Herschel Telescope to target hundreds of thousands of low f...

  11. Analysis on a Fractal Set

    E-Print Network [OSTI]

    Santanu Raut; Dhurjati Prasad Datta

    2010-01-10T23:59:59.000Z

    The formulation of a new analysis on a zero measure Cantor set $C (\\subset I=[0,1])$ is presented. A non-archimedean absolute value is introduced in $C$ exploiting the concept of {\\em relative} infinitesimals and a scale invariant ultrametric valuation of the form $\\log_{\\varepsilon^{-1}} (\\varepsilon/x) $ for a given scale $\\varepsilon>0$ and infinitesimals $0set, if it exists. The formulation of a scale invariant real analysis is also outlined, when the singleton $\\{0\\}$ of the real line $R$ is replaced by a zero measure Cantor set. The Cantor function is realised as a locally constant function in this setting. The ordinary derivative $dx/dt$ in $R$ is replaced by the scale invariant logarithmic derivative $d\\log x/d\\log t$ on the set of valued infinitesimals. As a result, the ordinary real valued functions are expected to enjoy some novel asymptotic properties, which might have important applications in number theory and in other areas of mathematics.

  12. Precision Measurement of the Proton Flux in Primary Cosmic Rays from Rigidity 1 GV to 1.8 TV with the Alpha Magnetic Spectrometer on the International Space Station

    E-Print Network [OSTI]

    Aguilar, M.

    A precise measurement of the proton flux in primary cosmic rays with rigidity (momentum/charge) from 1 GV to 1.8 TV is presented based on 300 million events. Knowledge of the rigidity dependence of the proton flux is ...

  13. Study of Calibration of Solar Radio Spectrometers and the quiet-Sun Radio Emission

    E-Print Network [OSTI]

    Tan, Chengming; Tan, Baolin; Fu, Qijun; Liu, Yuying; Xu, Guirong

    2015-01-01T23:59:59.000Z

    This work presents a systematic investigation of the influence of weather conditions on the calibration errors by using Gaussian fitness, least chi-square linear fitness and wavelet transform to analyze the calibration coefficients from observations of the Chinese Solar Broadband Radio Spectrometers (at frequency bands of 1.0-2.0 GHz, 2.6-3.8 GHz, and 5.2-7.6 GHz) during 1997-2007. We found that calibration coefficients are influenced by the local air temperature. Considering the temperature correction, the calibration error will reduce by about $10\\%-20\\%$ at 2800 MHz. Based on the above investigation and the calibration corrections, we further study the radio emission of the quiet-Sun by using an appropriate hybrid model of the quiet-Sun atmosphere. The results indicate that the numerical flux of the hybrid model is much closer to the observation flux than that of other ones.

  14. Probing dense matter in compact star cores with radio pulsar data

    E-Print Network [OSTI]

    Mark G. Alford; Kai Schwenzer

    2014-08-13T23:59:59.000Z

    Astrophysical observations of compact stars provide, in addition to collider experiments, the other big source of information on matter under extreme conditions. The largest and most precise data set about neutron stars is the timing data of radio pulsars. We show how this unique data can be used to learn about the ultra-dense matter in the compact star interior. The method relies on astro-seismology based on special global oscillation modes (r-modes) that emit gravitational waves. They would prevent pulsars from spinning with their observed high frequencies, unless the damping of these modes, determined by the microscopic properties of matter, can prevent this. We show that for each form of matter there is a distinct region in a frequency/spindown-rate diagram where r-modes can be present. We find that stars containing ungapped quark matter are consistent with both the observed radio and x-ray data, whereas, even when taking into account the considerable uncertainties, neutron star models with standard viscous damping are inconsistent with both data sets and additional damping mechanisms would be required.

  15. The DNA Files: Report from Genome Radio Project, March--June 1995

    SciTech Connect (OSTI)

    NONE

    1995-07-10T23:59:59.000Z

    The Genome Radio Project (GRP) core staff are now all in place and the office infrastructure has been set up. The project logo, stationery, and letterhead have all been approved. The name of the series has been identified: The DNA Files. Weekly staff planning meetings and work plans have been initiated; the research component has been launched; interviews of potential production personnel are being conducted. The first three months of the GRP were principally devoted to the further development of the entire two-year project, specifically by pursuing full funding for this project from sources other than DOE. The principal purpose of this planning grant includes the following: produce a pilot documentary which can be used to strengthen the marketing strategy of the overall project; create concrete strategies for best engaging the talents and energies of the project`s advisors; and identify concrete collaborations that maximize the efficacy of a well-designed set of ancillary materials. During this period, GRP collaborated with the Exploratorium in San Francisco to record their series of evening lectures on the social implications of genetic research and its applications. Project staff also attended Lawrence Berkeley Lab.`s Genome Educators Workshops, and the Public Radio Conference.

  16. An improved integrally formed radio frequency quadrupole

    DOE Patents [OSTI]

    Abbott, S.R.

    1987-10-05T23:59:59.000Z

    An improved radio frequency quadrupole is provided having an elongate housing with an elongate central axis and top, bottom and two side walls symmetrically disposed about the axis, and vanes formed integrally with the walls, the vanes each having a cross-section at right angles to the central axis which tapers inwardly toward the axis to form electrode tips spaced from each other by predetermined distances. Each of the four walls, and the vanes integral therewith, is a separate structural element having a central lengthwise plane passing through the tip of the vane, the walls having flat mounting surfaces at right angles to and parallel to the control plane, respectively, which are butted together to position the walls and vane tips relative to each other. 4 figs.

  17. Axion Stars and Fast Radio Bursts

    E-Print Network [OSTI]

    A. Iwazaki

    2014-10-23T23:59:59.000Z

    We show that fast radio bursts arise from collisions between axion stars and neutron stars. The bursts are emitted in the atmosphere of the neutron stars. The observed frequencies of the bursts are given by the axion mass $m_a$ such as $m_a/2\\pi\\simeq 1.4\\,\\mbox{GHz}\\,\\big(m_a/(6\\times 10^{-6}\\mbox{eV})\\big)$. From the event rate $\\sim 10^{-3}$ per year in a galaxy, we can determine the mass $\\sim 10^{-11}M_{\\odot}$ of the axion stars. Using these values we can explain short durations ( $\\sim $ms ) and amount of radiation energies ( $\\sim 10^{43}$GeV ) of the bursts.

  18. MicrobeWorld Radio and Communications Initiative

    SciTech Connect (OSTI)

    Barbara Hyde

    2006-11-22T23:59:59.000Z

    MicrobeWorld is a 90-second feature broadcast daily on more than 90 public radio stations and available from several sources as a podcast, including www.microbeworld.org. The feature has a strong focus on the use and adapatbility of microbes as alternative sources of energy, in bioremediation, their role in climate, and especially the many benefits and scientific advances that have resulting from decoding microbial genomes. These audio features are permanantly archived on an educational outreach site, microbeworld.org, where they are linked to the National Science Education Standards. They are also being used by instructors at all levels to introduce students to the multiple roles and potential of microbes, including a pilot curriculum program for middle-school students in New York.

  19. Radio Triggered Star Formation in Cooling Flows

    E-Print Network [OSTI]

    B. R. McNamara

    1999-11-08T23:59:59.000Z

    The giant galaxies located at the centers of cluster cooling flows are frequently sites of vigorous star formation. In some instances, star formation appears to have been triggered by the galaxy's radio source. The colors and spectral indices of the young populations are generally consistent with short duration bursts or continuous star formation for durations much less than 1 Gyr, which is less than the presumed ages of cooling flows. The star formation properties are inconsistent with fueling by a continuously accreting cooling flow, although the prevalence of star formation is consistent with repeated bursts and periodic refueling. Star formation may be fueled, in some cases, by cold material stripped from neighboring cluster galaxies.

  20. The nature of extragalactic radio-jets from high-resolution radio-interferometric observations

    E-Print Network [OSTI]

    Perucho, Manel

    2015-01-01T23:59:59.000Z

    Extragalactic jets are a common feature of radio-loud active galaxies. The nature of the observed jets in relation to the bulk flow is still unclear. In particular it is not clear whether the observations of parsec-scale jets using the very long baseline interferometric technique (VLBI) reveal wave-like structures that develop and propagate along the jet, or trace the jet flow itself. In this contribution I review the evidence collected during the last years showing that the ridge-lines of helical radio-jets do not correspond to observational artifacts. This conclusion was reached by studying a number of VLBI observations of the radio jet in the quasar S5~0836+710 at different frequencies and epochs. The ridge-line of the emission in the jet coincides at all frequencies within the errors. Moreover, small differences between the ridge-lines as observed at different epochs reveal wave-like motion transversal to the jet propagation axis. I also discuss similar results, albeit with different interpretations, obta...

  1. AT&T U-verse Terms of Service AT&T U-verse Voice and TV

    E-Print Network [OSTI]

    Fisher, Kathleen

    of Service 1. GENERAL AGREEMENT The following Terms of Service (referred to as "TOS") are between youSouth Telecommunications, Inc. (each individually and collectively referred to as "AT&T"). The TOS constitute a legal-verse Voice service, your TOS include the General Terms of Service set forth herein, and the attached Schedule

  2. Old stellar populations in distant radio galaxies

    E-Print Network [OSTI]

    James Dunlop

    1998-01-13T23:59:59.000Z

    I describe the current status of our attempts to determine the age of the oldest known stellar populations at high redshift, in the red mJy radio galaxies 53W091 ($z = 1.55$) and 53W069 ($z = 1.43$). During the past year the original conclusion of Dunlop et al. (1996) - that 53W091 is $>3$ Gyr old - has been questioned from two, basically orthogonal directions. First, reports that the near-infrared light from 53W091 is highly polarized have cast some doubt on whether its red colour is genuinely due to an old population of stars. Second, assuming that all the light is indeed due to stars, it has been claimed that 53W091 is in fact only 1-2 Gyr old. Here I present a preliminary analysis of new infrared polarimetric observations of 53W091 which show that the first of these criticisms can be rejected with very high confidence. I then explore why different modellers have derived different ages for 53W091, and present new model fits to the spectrum of 53W069 which demonstrate that different spectral synthesis codes are certainly in good agreement that this galaxy is 3-4 Gyr old. Finally I present a preliminary analysis of the morphologies and scale-lengths of 53W091 and 53W069 as derived from new I-band WFPC2 HST images, and compare the results with those for 3CR galaxies at comparable redshifts. I conclude that the scalelengths and luminosities of radio galaxies at $z \\simeq 1.5$ appear to scale together as would be predicted from the Kormendy relation for low-redshift elliptical galaxies.

  3. On the Nature of Pulsar Radio Emission

    E-Print Network [OSTI]

    Maxim Lyutikov; Roger D. Blandford; George Machabeli

    1998-06-27T23:59:59.000Z

    A theory of pulsar radio emission generation, in which the observed waves are produced directly by maser-type plasma instabilities operating at the anomalous cyclotron-Cherenkov resonance $\\omega- k_{\\parallel} v_{\\parallel} + \\omega_B/ \\gamma_{res}=0$ and the Cherenkov-drift resonance $\\omega- k_{\\parallel} v_{\\parallel} - k_{\\perp} u_d =0$, is capable of explaining the main observational characteristics of pulsar radio emission. The instabilities are due to the interaction of the fast particles from the primary beam and the tail of the distribution with the normal modes of a strongly magnetized one-dimensional electron-positron plasma. The waves emitted at these resonances are vacuum-like, electromagnetic waves that may leave the magnetosphere directly. In this model, the cyclotron-Cherenkov instability is responsible for core emission pattern and the Cherenkov-drift instability produces conal emission. The conditions for the development of the cyclotron-Cherenkov instability are satisfied for both typical and millisecond pulsars provided that the streaming energy of the bulk plasma is not very high $\\gamma_p \\approx 10$. In a typical pulsar the cyclotron-Cherenkov and Cherenkov-drift resonances occur in the outer parts of magnetosphere at $r_{res} \\approx 10^9 cm$. This theory can account for various aspects of pulsar phenomenology including the morphology of the pulses, their polarization properties and their spectral behavior. We propose several observational tests for the theory. The most prominent prediction are the high altitudes of the emission region and the linear polarization of conal emission in the plane orthogonal to the local osculating plane of the magnetic field.

  4. Predicting low-frequency radio fluxes of known extrasolar planets

    E-Print Network [OSTI]

    J. -M. Grießmeier; P. Zarka; H. Spreeuw

    2008-06-02T23:59:59.000Z

    Context. Close-in giant extrasolar planets (''Hot Jupiters'') are believed to be strong emitters in the decametric radio range. Aims. We present the expected characteristics of the low-frequency magnetospheric radio emission of all currently known extrasolar planets, including the maximum emission frequency and the expected radio flux. We also discuss the escape of exoplanetary radio emission from the vicinity of its source, which imposes additional constraints on detectability. Methods. We compare the different predictions obtained with all four existing analytical models for all currently known exoplanets. We also take care to use realistic values for all input parameters. Results. The four different models for planetary radio emission lead to very different results. The largest fluxes are found for the magnetic energy model, followed by the CME model and the kinetic energy model (for which our results are found to be much less optimistic than those of previous studies). The unipolar interaction model does not predict any observable emission for the present exoplanet census. We also give estimates for the planetary magnetic dipole moment of all currently known extrasolar planets, which will be useful for other studies. Conclusions. Our results show that observations of exoplanetary radio emission are feasible, but that the number of promising targets is not very high. The catalog of targets will be particularly useful for current and future radio observation campaigns (e.g. with the VLA, GMRT, UTR-2 and with LOFAR).

  5. Problem Set 3 Let's Simplex

    E-Print Network [OSTI]

    Chen, Yiling

    Problem Set 3 Let's Simplex Applied Mathematics 121 -- Spring 2011 Due 5:00 PM, Friday, February 18 linear programs using the Simplex method. Second, you will get a better understanding of linear programming through a better understanding of the Simplex method. Contents 1 Making it rain 2 2 Simplex

  6. Problem Set 3 Let's Simplex

    E-Print Network [OSTI]

    Chen, Yiling

    Problem Set 3 Let's Simplex AM121/ES121 -- Fall 2014 Due 5:00 PM, Tuesday, September 30, 2014 linear programs using the Simplex method. Second, you will get a better understanding of linear programming through a better understanding of the Simplex method. Contents 1 Making it rain 3 2 Simplex

  7. Problem Set 3 Let's Simplex

    E-Print Network [OSTI]

    Chen, Yiling

    Problem Set 3 Let's Simplex Applied Mathematics 121 -- Spring 2014 Due 5:00 PM, Friday, February 21 practice solving linear programs using the Simplex method. Second, you will get a better understanding of linear programming through a better understanding of the Simplex method. Contents 1 Making it rain 3 2

  8. Studying the properties of the radio emitter in LS 5039

    E-Print Network [OSTI]

    V. Bosch-Ramon

    2008-11-06T23:59:59.000Z

    LS 5039 is an X-ray binary that presents non-thermal radio emission. The radiation at $\\sim 5$ GHz is quite steady and optically thin, consisting on a dominant core plus an extended jet-like structure. There is a spectral turnover around 1 GHz, and evidence of variability at timescales of 1 yr at 234 MHz. We investigate the radio emitter properties using the available broadband radio data, and assuming two possible scenarios to explain the turnover: free-free absorption in the stellar wind, or synchrotron self-absorption. We use the relationships between the turnover frequency, the stellar wind density, the emitter location, size and magnetic field, and the Lorentz factor of the emitting electrons, as well as a reasonable assumption on the energy budget, to infer the properties of the low-frequency radio emitter. Also, we put this information in context with the broadband radio data. The location and size of the low-frequency radio emitter can be restricted to $\\ga$ few AU from the primary star, its magnetic field to $\\sim 3\\times 10^{-3}-1$ G, and the electron Lorentz factors to $\\sim 10-100$. The observed variability of the extended structures seen with VLBA would point to electron bulk velocities $\\ga 3\\times 10^8$ cm s$^{-1}$, whereas much less variable radiation at 5 GHz would indicate velocities for the VLBA core $\\la 10^8$ cm s$^{-1}$. The emission at 234 MHz in the high state would mostly come from a region larger than the dominant broadband radio emitter. We suggest a scenario in which secondary pairs, created via gamma-ray absorption and moving in the stellar wind, are behind the steady broadband radio core, whereas the resolved jet-like radio emission would come from a collimated, faster, outflow.

  9. Method and apparatus for radio frequency ceramic sintering

    DOE Patents [OSTI]

    Hoffman, D.J.; Kimrey, H.D. Jr.

    1993-11-30T23:59:59.000Z

    Radio frequency energy is used to sinter ceramic materials. A coaxial waveguide resonator produces a TEM mode wave which generates a high field capacitive region in which a sample of the ceramic material is located. Frequency of the power source is kept in the range of radio frequency, and preferably between 60-80 MHz. An alternative embodiment provides a tunable radio frequency circuit which includes a series input capacitor and a parallel capacitor, with the sintered ceramic connected by an inductive lead. This arrangement permits matching of impedance over a wide range of dielectric constants, ceramic volumes, and loss tangents. 6 figures.

  10. Method and apparatus for radio frequency ceramic sintering

    DOE Patents [OSTI]

    Hoffman, Daniel J. (Oak Ridge, TN); Kimrey, Jr., Harold D. (Knoxville, TN)

    1993-01-01T23:59:59.000Z

    Radio frequency energy is used to sinter ceramic materials. A coaxial waveguide resonator produces a TEM mode wave which generates a high field capacitive region in which a sample of the ceramic material is located. Frequency of the power source is kept in the range of radio frequency, and preferably between 60-80 MHz. An alternative embodiment provides a tunable radio frequency circuit which includes a series input capacitor and a parallel capacitor, with the sintered ceramic connected by an inductive lead. This arrangement permits matching of impedance over a wide range of dielectric constants, ceramic volumes, and loss tangents.

  11. High-power radio-frequency attenuation device

    DOE Patents [OSTI]

    Kerns, Q.A.; Miller, H.W.

    1981-12-30T23:59:59.000Z

    A resistor device for attenuating radio frequency power includes a radio frequency conductor connected to a series of fins formed of high relative magnetic permeability material. The fins are dimensional to accommodate the skin depth of the current conduction therethrough, as well as an inner heat conducting portion where current does not travel. Thermal connections for air or water cooling are provided for the inner heat conducting portions of each fin. Also disclosed is a resistor device to selectively alternate unwanted radio frequency energy in a resonant cavity.

  12. A pilot study of the radio-emitting AGN population: the emerging new class of FR0 radio-galaxies

    E-Print Network [OSTI]

    Baldi, Ranieri D; Giovannini, Gabriele

    2015-01-01T23:59:59.000Z

    We present the results of a pilot JVLA project aimed at studying the bulk of the radio-emitting AGN population, unveiled by the NVSS/FIRST and SDSS surveys.We obtained A-array observations at the JVLA at 1.4, 4.5, and 7.5 GHz for 12 sources of the SDSS/NVSS sample. The radio maps reveal compact unresolved or slightly resolved radio structures on a scale of 1-3 kpc, with only one exception of a FRI/FRII source extended over $\\sim$40 kpc. We isolate the radio core component in most of them. The sample splits into two groups. Four sources have small black hole (BH) masses (mostly $\\sim$10$^{7}$ M$_{\\odot}$) and are hosted by blue galaxies, often showing evidence of a contamination from star formation to their radio emission and associated with radio-quiet AGN. The second group consists in seven radio-loud AGN, which live in red massive ($\\sim10^{11}$ M$_{\\odot}$) early-type galaxies, with large BH masses ($\\gtrsim$10$^{8}$ M$_{\\odot}$), and spectroscopically classified as Low Excitation Galaxies, all characteris...

  13. A Stream-Based Configurable Computing Radio Testbed Steve Swanchara, Scott Harper, and Peter Athanas

    E-Print Network [OSTI]

    -based CCM soft radio consisting of a variety of FPGAs, memories, and a programmable radio interface, providing a pathway from antenna to wired network. CCM techniques are well suited for the computations to a production radio is not always apparent. A CCM-based soft radio can exploit the data flow nature

  14. 4.1.2.8 Radio bursts of the nonthermal sun Arnold O. Benz

    E-Print Network [OSTI]

    4.1.2.8 Radio bursts of the non­thermal sun Arnold O. Benz The time scale of the radio flux. The dis­ tinctions and classifications by radio astronomers should not be considered as se­ mantic described in the previous chap­ ter. 1 Solar radio bursts Enhancements shorter than about one hour form

  15. THE UV/RADIO CORRELATION OF QUASARS AND ITS IMPLICATIONS FOR UNIFIED SCHEMES.

    E-Print Network [OSTI]

    Falcke, Heino

    THE UV/RADIO CORRELATION OF QUASARS AND ITS IMPLICATIONS FOR UNIFIED SCHEMES. HEINO FALCKE of the UV/radio correlations [4] of quasars and the difference between FR I and FR II radio galaxies [3]. 2. The UV/radio correlation for quasars If there is a closely coupled jet/disk system in AGN we would expect

  16. Suppression of radio frequency knock out in stacked beams by phase shifting the betatron oscillations

    E-Print Network [OSTI]

    Terwilliger, K M

    1957-01-01T23:59:59.000Z

    Suppression of radio frequency knock out in stacked beams by phase shifting the betatron oscillations

  17. 34 GPS World July 2001 www.gpsworld.com radio occultation, the tangency point of the

    E-Print Network [OSTI]

    and scans the atmospher- ic layers at Earth's limb from the ionosphere to the surface. When the radio ray Plasma Irregularities Klemens Hocke and Toshitaka Tsuda Kyoto University, Radio Science Center for Space been a professor of Radio Atmospheric Sciences at the Radio Science Center for Space and Atmosphere

  18. Energy Saving Glass Lamination via Selective Radio-Frequency Heating

    SciTech Connect (OSTI)

    Shulman, Holly S.; Allan, Shawn M.

    2009-11-11T23:59:59.000Z

    This Inventions and Innovations program supported the technical and commercial research and development needed to elevate Ceralink's energy saving process for flat glass lamination from bench scale to a self-supporting technology with significant potential for growth. Radio-frequency heating was any un-explored option for laminating glass prior to this program. With significant commercial success through time and energy savings in the wood, paper, and plastics industries, RF heating was found to have significant promise for the energy intensive glass lamination industry. A major technical goal of the program was to demonstrate RF lamination across a wide range of laminate sizes and materials. This was successfully accomplished, dispelling many skeptics' concerns about the abilities of the technology. Ceralink laminated panels up to 2 ft x 3 ft, with four sets processed simultaneously, in a 3 minute cycle. All major categories of interlayer materials were found to work with RF lamination. In addition to laminating glass, other materials including photovoltaic silicon solar cells, light emitting diodes, metallized glass, plastics (acrylic and polycarbonate), and ceramics (alumina) were found compatible with the RF process. This opens up a wide range of commercial opportunities beyond the initially targeted automotive industry. The dramatic energy savings reported for RF lamination at the bench scale were found to be maintained through the scale up of the process. Even at 2 ft x 3 ft panel sizes, energy savings are estimated to be at least 90% compared to autoclaving or vacuum lamination. With targeted promotion through conference presentations, press releases and internet presence, RF lamination has gained significant attention, drawing large audiences at American Ceramic Society meetings. The commercialization success of the project includes the establishment of a revenue-generating business model for providing process development and demonstrations for potential RF lamination users. A path to industrial energy benefits and revenue through industrial equipment sales was established in a partnership with Thermex Thermatron, a manufacturer of RF equipment.

  19. VERY LONG BASELINE ARRAY MULTI-FREQUENCY POLARIMETRIC IMAGING OF RADIO-LOUD BROAD ABSORPTION LINE QUASARS

    SciTech Connect (OSTI)

    Hayashi, Takayuki J.; Nagai, Hiroshi [National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588 (Japan); Doi, Akihiro, E-mail: t.hayashi@nao.ac.jp [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Chuo, Sagamihara, Kanagawa, 252-5210 (Japan)

    2013-07-20T23:59:59.000Z

    We conducted the first multi-frequency polarimetric imaging of four broad absorption line (BAL) quasars using the Very Long Baseline Array at milliarcsecond resolutions to investigate the inclination of the nonthermal jet and test the hypothesis that radio sources in BAL quasars are still young. Among these four sources, J0928+446, J1018+0530, and J1405+4056 show one-sided structures in parsec scales and polarized emission detected in the core. These characteristics are consistent with those of blazars. We set constraints on viewing angles to <66 Degree-Sign for these jets in the framework of a Doppler beaming effect. J1159+0112 exhibits an unpolarized gigahertz-peaked spectrum component and several discrete blobs with steep spectra on both sides of the central component across {approx}1 kpc. These properties are consistent with those of young radio sources. We discuss the structures of jets and active galactic nucleus wind.

  20. Optical set-reset latch

    DOE Patents [OSTI]

    Skogen, Erik J.

    2013-01-29T23:59:59.000Z

    An optical set-reset (SR) latch is formed from a first electroabsorption modulator (EAM), a second EAM and a waveguide photodetector (PD) which are arranged in an optical and electrical feedback loop which controls the transmission of light through the first EAM to latch the first EAM in a light-transmissive state in response to a Set light input. A second waveguide PD controls the transmission of light through the second EAM and is used to switch the first EAM to a light-absorptive state in response to a Reset light input provided to the second waveguide PD. The optical SR latch, which may be formed on a III-V compound semiconductor substrate (e.g. an InP or a GaAs substrate) as a photonic integrated circuit (PIC), stores a bit of optical information and has an optical output for the logic state of that bit of information.

  1. Electrical contact tool set station

    DOE Patents [OSTI]

    Byers, M.E.

    1988-02-22T23:59:59.000Z

    An apparatus is provided for the precise setting to zero of electrically conductive cutting tools used in the machining of work pieces. An electrically conductive cylindrical pin, tapered at one end to a small flat, rests in a vee-shaped channel in a base so that its longitudinal axis is parallel to the longitudinal axis of the machine's spindle. Electronic apparatus is connected between the cylindrical pin and the electrically conductive cutting tool to produce a detectable signal when contact between tool and pin is made. The axes of the machine are set to zero by contact between the cutting tool and the sides, end or top of the cylindrical pin. Upon contact, an electrical circuit is completed, and the detectable signal is produced. The tool can then be set to zero for that axis. Should the tool contact the cylindrical pin with too much force, the cylindrical pin would be harmlessly dislodged from the vee-shaped channel, preventing damage either to the cutting tool or the cylindrical pin. 5 figs.

  2. Throughput Analysis of Wireless Ad-Hoc Cognitive Radio Networks 

    E-Print Network [OSTI]

    Banaei, Armin

    2014-04-25T23:59:59.000Z

    In this dissertation we consider the throughput performance of cognitive radio networks and derive the optimal sensing and access schemes for secondary users that maximizes their sum-throughput while guaranteeing certain ...

  3. Radio-loud high-redshift protogalaxy canidates in Bootes

    SciTech Connect (OSTI)

    Croft, S; van Breugel, W; Brown, M J; de Vries, W; Dey, A; Eisenhardt, P; Jannuzi, B; Rottgering, H; Stanford, S A; Stern, D; Willner, S P

    2007-07-20T23:59:59.000Z

    We used the Near Infrared Camera (NIRC) on Keck I to obtain K{sub s}-band images of four candidate high-redshift radio galaxies selected using optical and radio data in the NOAO Deep Wide-Field Survey in Bootes. Our targets have 1.4 GHz radio flux densities greater than 1 mJy, but are undetected in the optical. Spectral energy distribution fitting suggests that three of these objects are at z > 3, with radio luminosities near the FR-I/FR-II break. The other has photometric redshift z{sub phot} = 1.2, but may in fact be at higher redshift. Two of the four objects exhibit diffuse morphologies in K{sub s}-band, suggesting that they are still in the process of forming.

  4. Radio frequency identification (RFID) applications in semiconductor manufacturing

    E-Print Network [OSTI]

    Cassett, David Ian, 1971-

    2004-01-01T23:59:59.000Z

    Radio frequency identification (RFID) has an enormous potential impact within the semiconductor supply chain, especially within semiconductor manufacturing. The end benefit of RFID will be in the mass serialization, and ...

  5. Enhancing the energy efficiency of radio base stations 

    E-Print Network [OSTI]

    Holtkamp, Hauke Andreas

    2014-06-30T23:59:59.000Z

    This thesis is concerned with the energy efficiency of cellular networks. It studies the dominant power consumer in future cellular networks, the Long Term Evolution (LTE) radio Base Station (BS), and proposes mechanisms ...

  6. Radio-frequency spectroscopy of ultracold atomic Fermi gases

    E-Print Network [OSTI]

    Schirotzek, Andre

    2010-01-01T23:59:59.000Z

    This thesis presents experiments investigating the phase diagram of ultracold atomic Fermi gases using radio-frequency spectroscopy. The tunability of many experimental parameters including the temperature, the interparticle ...

  7. NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia Elec-xonics Division Internal Report 140 MV The battery voltage as a function of temperature was also measured. The voltage was extremely

  8. NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia Electronics Division Internal Report with the calculator. It is constructed from CMOS logic for lowest power consumption and has a NiCad battery back

  9. Numerical modelling of a radio-frequency micro ion thruster

    E-Print Network [OSTI]

    Tsay, Michael Meng-Tsuan

    2006-01-01T23:59:59.000Z

    A simple performance model is developed for an inductively-coupled radio-frequency micro ion thruster. Methods of particle and energy balance are utilized for modeling the chamber plasma discharge. A transformer model is ...

  10. Circuits and passive components for radio-frequency power conversion

    E-Print Network [OSTI]

    Han, Yehui, Ph. D. Massachusetts Institute of Technology

    2010-01-01T23:59:59.000Z

    This thesis focuses on developing technology for high efficiency power converters operating at very high frequencies. The work in the thesis involves two aspects of such converters: rf (radio-frequency) power circuit design ...

  11. Performance Analysis of Dispersed Spectrum Cognitive Radio Systems

    E-Print Network [OSTI]

    Mohammad, Muneer

    2011-02-22T23:59:59.000Z

    probability of dispersed spectrum cognitive radio systems is derived for two cases: where each channel realization experiences independent and dependent Nakagami-m fading, respectively. In addition, the derivation is extended to include the effects...

  12. Throughput Analysis of Wireless Ad-Hoc Cognitive Radio Networks

    E-Print Network [OSTI]

    Banaei, Armin

    2014-04-25T23:59:59.000Z

    In this dissertation we consider the throughput performance of cognitive radio networks and derive the optimal sensing and access schemes for secondary users that maximizes their sum-throughput while guaranteeing certain quality of service...

  13. ORAL QUAL SYLLABUS: SET THEORY; ERGODIC THEORY

    E-Print Network [OSTI]

    ORAL QUAL SYLLABUS: SET THEORY; ERGODIC THEORY SAMUEL COSKEY Set Theory. #15; Basic set theory's theorem { there exists an Aronsajn tree { Shanin's root system lemma (#2;2) #15; Descriptive set theory of set theory (Jech 12,13) { Mostowski's collapsing theorem { relativization and absolute formulas { re

  14. 22 ON WISCONSIN Summer 2008 23

    E-Print Network [OSTI]

    Turner, Monica G.

    -- riveted the public. Fiery images dominated television sets and headlines across the nation- sity, steeled themselves for their first look at the remains of the park. But as the copter lifted them

  15. EA-0819: Final Environmental Assessment

    Broader source: Energy.gov [DOE]

    Proposed Energy Conservation Standards for Eight Types of Consumer Products: Room Air Conditioners, Water Heaters, Direct Heating Equipment, Mobile Home Furnaces, Ranges and Ovens, Pool Heaters, Fluorescent Ballasts, and Television Sets

  16. The 18th Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'07) IMPLEMENTING BACKSCATTER RADIO FOR WIRELESS SENSOR NETWORKS

    E-Print Network [OSTI]

    (PIMRC'07) IMPLEMENTING BACKSCATTER RADIO FOR WIRELESS SENSOR NETWORKS Giovanni Vannucci Mitsubishi Electric Research Laboratories, Cambridge USA Aggelos Bletsas RadioCommunications Lab (RCL) Aristotle University of Thessaloniki, Greece Darren Leigh Mitsubishi Electric Research Laboratories, Cambridge USA

  17. Deep ATLAS radio observations of the CDFS-SWIRE field

    E-Print Network [OSTI]

    Ray P. Norris; Jose Afonso; Phil N. Appleton; Brian J. Boyle; Paolo Ciliegi; Scott M. Croom; Minh T. Huynh; Carole A. Jackson; Anton M. Koekemoer; Carol J. Lonsdale; Enno Middelberg; Bahram Mobasher; Seb J. Oliver; Mari Polletta; Brian D. Siana; Ian Smail; Maxim A. Voronkov

    2006-10-18T23:59:59.000Z

    We present the first results from the Australia Telescope Large Area Survey (ATLAS), which consist of deep radio observations of a 3.7 square degree field surrounding the Chandra Deep Field South, largely coincident with the infrared Spitzer Wide-Area Extragalactic (SWIRE) Survey. We also list cross-identifications to infrared and optical photometry data from SWIRE, and ground-based optical spectroscopy. A total of 784 radio components are identified, corresponding to 726 distinct radio sources, nearly all of which are identified with SWIRE sources. Of the radio sources with measured redshifts, most lie in the redshift range 0.5-2, and include both star-forming galaxies and active galactic nuclei (AGN). We identify a rare population of infrared-faint radio sources which are bright at radio wavelengths but are not seen in the available optical, infrared, or X-ray data. Such rare classes of sources can only be discovered in wide, deep surveys such as this.

  18. Radio Afterglows and Host Galaxies of Gamma-Ray Bursts

    E-Print Network [OSTI]

    Li, Long-Biao; Huang, Yong-Feng; Wu, Xue-Feng; Kong, Si-Wei; Li, Di; Chang, Heon-Young; Choi, Chul-Sung

    2015-01-01T23:59:59.000Z

    Considering the contribution of the emission from the host galaxies of gamma-ray bursts (GRBs) to the radio afterglows, we investigate the effect of host galaxies on observations statistically. For the three types of events, e.g. low-luminosity, standard and high-luminosity GRBs, it is found that a tight correlation exists between the ratio of the radio flux (RRF) of host galaxy to the total radio peak emission and the observational frequency. Especially, toward lower frequencies, the contribution from the host increases significantly. The correlation can be used to get a useful estimate for the radio brightness of those host galaxies which only have very limited radio afterglow data. Using this prediction, we re-considered the theoretical radio afterglow light curves for four kinds of events, i.e. high-luminosity, low-luminosity, standard and failed GRBs, taking into account the contribution from the host galaxies and aiming at exploring the detectability of these events by the Five-hundred-meter Aperture Sp...

  19. Radio faint AGN: a tale of two populations

    E-Print Network [OSTI]

    Padovani, P; Kellermann, K I; Miller, N; Mainieri, V; Tozzi, P

    2015-01-01T23:59:59.000Z

    We study the Extended Chandra Deep Field South (E-CDFS) Very Large Array sample, which reaches a flux density limit at 1.4 GHz of 32.5 microJy at the field centre and redshift ~ 4, and covers ~ 0.3 deg^2. Number counts are presented for the whole sample while the evolutionary properties and luminosity functions are derived for active galactic nuclei (AGN). The faint radio sky contains two totally distinct AGN populations, characterised by very different evolutions, luminosity functions, and Eddington ratios: radio-quiet (RQ)/radiative-mode, and radio-loud/jet-mode AGN. The radio power of RQ AGN evolves ~ (1+z)^2.5, similarly to star-forming galaxies, while the number density of radio-loud ones has a peak at ~ 0.5 and then declines at higher redshifts. The number density of radio-selected RQ AGN is consistent with that of X-ray selected AGN, which shows that we are sampling the same population. The unbiased fraction of radiative-mode RL AGN, derived from our own and previously published data, is a strong funct...

  20. Exploring the magnetized cosmic web through low frequency radio emission

    E-Print Network [OSTI]

    N. Battaglia; C. Pfrommer; J. L. Sievers; J. R. Bond; T. A. Ensslin

    2009-08-07T23:59:59.000Z

    Recent improvements in the capabilities of low frequency radio telescopes provide a unique opportunity to study thermal and non-thermal properties of the cosmic web. We argue that the diffuse, polarized emission from giant radio relics traces structure formation shock waves and illuminates the large-scale magnetic field. To show this, we model the population of shock-accelerated relativistic electrons in high-resolution cosmological simulations of galaxy clusters and calculate the resulting radio synchrotron emission. We find that individual shock waves correspond to localized peaks in the radio surface brightness map which enables us to measure Mach numbers for these shocks. We show that the luminosities and number counts of the relics strongly depend on the magnetic field properties, the cluster mass and dynamical state. By suitably combining different cluster data, including Faraday rotation measures, we are able to constrain some macroscopic parameters of the plasma at the structure formation shocks, such as models of turbulence. We also predict upper limits for the properties of the warm-hot intergalactic medium, such as its temperature and density. We predict that the current generation of radio telescopes (LOFAR, GMRT, MWA, LWA) have the potential to discover a substantially larger sample of radio relics, with multiple relics expected for each violently merging cluster. Future experiments (SKA) should enable us to further probe the macroscopic parameters of plasma physics in clusters.

  1. A search for molecular gas in restarting radio galaxies

    E-Print Network [OSTI]

    Lakshmi Saripalli; Karl-Heinz Mack

    2007-02-14T23:59:59.000Z

    Several radio galaxies are known that show radio morphological signatures that are best interpreted as restarting of nuclear activity after a period of quiescence. The conditions surrounding the phenomenon of nuclear recurrence are not understood. In this paper we have attempted to address this question by examining the nuclear fuelling characteristics in a sample of restarting radio galaxies. We have examined the detection rate for molecular gas in a representative sample of nine restarting radio galaxies, for seven of which we present new upper limits to the molecular gas mass derived from CO line observations we made with the IRAM 30-m telescope. We derive a low CO detection rate for the relatively young restarted radio galaxies suggesting that the cessation of the nuclear activity and its subsequent restarting may be a result of instabilities in the fuelling process rather than a case of depletion of fuel followed by a recent fuel acquisition. It appears that abundant molecular gas content at the level of few 10^8 to 10^9 solar masses does not necessarily accompany the nuclear restarting phenomenon. For comparison we also discuss the molecular gas properties of five normal giant radio galaxies, three of which we observed using SEST. Despite obvious signs of interactions and nuclear dust disks none of them has been found to host significant quantities of molecular gas.

  2. Antenna unit and radio base station therewith

    DOE Patents [OSTI]

    Kuwahara, Mikio; Doi, Nobukazu; Suzuki, Toshiro; Ishida, Yuji; Inoue, Takashi; Niida, Sumaru

    2007-04-10T23:59:59.000Z

    Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband. The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

  3. Fourier phase analysis in radio-interferometry

    E-Print Network [OSTI]

    Francois Levrier; Edith Falgarone; Francois Viallefond

    2006-06-09T23:59:59.000Z

    Most statistical tools used to characterize the complex structures of the interstellar medium can be related to the power spectrum, and therefore to the Fourier amplitudes of the observed fields. To tap into the vast amount of information contained in the Fourier phases, one may consider the probability distribution function (PDF) of phase increments, and the related concepts of phase entropy and phase structure quantity. We use these ideas here with the purpose of assessing the ability of radio-interferometers to detect and recover this information. By comparing current arrays such as the VLA and Plateau de Bure to the future ALMA instrument, we show that the latter is definitely needed to achieve significant detection of phase structure, and that it will do so even in the presence of a fair amount of atmospheric phase fluctuations. We also show that ALMA will be able to recover the actual "amount'' of phase structure in the noise-free case, if multiple configurations are used.

  4. Trirotron: triode rotating beam radio frequency amplifier

    DOE Patents [OSTI]

    Lebacqz, Jean V. (Stanford, CA)

    1980-01-01T23:59:59.000Z

    High efficiency amplification of radio frequencies to very high power levels including: establishing a cylindrical cloud of electrons; establishing an electrical field surrounding and coaxial with the electron cloud to bias the electrons to remain in the cloud; establishing a rotating electrical field that surrounds and is coaxial with the steady field, the circular path of the rotating field being one wavelength long, whereby the peak of one phase of the rotating field is used to accelerate electrons in a beam through the bias field in synchronism with the peak of the rotating field so that there is a beam of electrons continuously extracted from the cloud and rotating with the peak; establishing a steady electrical field that surrounds and is coaxial with the rotating field for high-energy radial acceleration of the rotating beam of electrons; and resonating the rotating beam of electrons within a space surrounding the second field, the space being selected to have a phase velocity equal to that of the rotating field to thereby produce a high-power output at the frequency of the rotating field.

  5. DEEP SPITZER OBSERVATIONS OF INFRARED-FAINT RADIO SOURCES: HIGH-REDSHIFT RADIO-LOUD ACTIVE GALACTIC NUCLEI?

    SciTech Connect (OSTI)

    Norris, Ray P.; Mao, Minnie [CSIRO Australia Telescope National Facility, P.O. Box 76, Epping, NSW, 1710 (Australia); Afonso, Jose [Observatorio Astronomico de Lisboa, Faculdade de Ciencias, Universidade de Lisboa, Tapada da Ajuda, 1349-018 Lisbon (Portugal); Cava, Antonio [Departamento de Astrofisica, Facultad de CC. Fisicas, Universidad Complutense de Madrid, E-28040 Madrid (Spain); Farrah, Duncan; Oliver, Seb [Astronomy Centre, Department of Physics and Astronomy, University of Sussex, Brighton BN1 9QH (United Kingdom); Huynh, Minh T.; Mauduit, Jean-Christophe; Surace, Jason [Infrared Processing and Analysis Center, MS220-6, California Institute of Technology, Pasadena, CA 91125 (United States); Ivison, R. J. [UK Astronomy Technology Centre, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ (United Kingdom); Jarvis, Matt [Centre for Astrophysics, Science and Technology Research Institute, University of Hertfordshire, Hatfield, Herts, AL10 9AB (United Kingdom); Lacy, Mark [NRAO, 520 Edgemont Road, Charlottesville, VA 22903 (United States); Maraston, Claudia [Institute of Cosmology and Gravitation, Dennis Sciama Building, Burnaby Road, Portsmouth, PO1 3FX (United Kingdom); Middelberg, Enno [Astronomisches Institut, Ruhr-Universitaet Bochum, Universitaetsstr. 150, 44801 Bochum (Germany); Seymour, Nick, E-mail: Ray.Norris@csiro.au [Mullard Space Science Laboratory, UCL, Holmbury St Mary, Dorking, Surrey, RH5 6NT (United Kingdom)

    2011-07-20T23:59:59.000Z

    Infrared-faint radio sources (IFRSs) are a rare class of objects which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of a sample of these sources taken as part of the Spitzer Extragalactic Representative Volume Survey. Nearly all the IFRSs are undetected at a level of {approx}1 {mu}Jy in these new deep observations, and even the detections are consistent with confusion with unrelated galaxies. A stacked image implies that the median flux density is S{sub 3.6{mu}m} {approx} 0.2 {mu}Jy or less, giving extreme values of the radio-infrared flux density ratio. Comparison of these objects with known classes of object suggests that the majority are probably high-redshift radio-loud galaxies, possibly suffering from significant dust extinction.

  6. Set Multicover The Set Multicover problem is the same as set cover except

    E-Print Network [OSTI]

    Golin, Mordecai J.

    during that step. Notice that the average cost can not decrease. Then 8e 2 U price(e; 1) Ÿ price(e; 2) Ÿ to be covered a specified number of times. That is we want to pick a minimum­cost set cover such that element e algorithm to multi­ cover A Greedy MultiCover algorithm U / X C / ; select a F 2 F that minimizes Cost(F ) j

  7. Set Multicover The Set Multicover problem is the same as set cover except

    E-Print Network [OSTI]

    Golin, Mordecai J.

    price(e; j) = Cost(F ) jF ``U j If j = r e remove e from U: return(C) This algorithm is very similar during that step. Notice that the average cost can not decrease. Then 8e 2 U price(e; 1) Ÿ price(e; 2) Ÿ to be covered a specified number of times. That is we want to pick a minimum­cost set cover such that element e

  8. Discrete Sets of Singular Cardinality

    E-Print Network [OSTI]

    Fleissner, William G.

    1983-08-02T23:59:59.000Z

    singular cardinal k and a closed, cofinal in k, set of cardinals, {kb: ß «,. Throughout this paper, Y will be a discrete subset of a space X with | Y \\ = k. We say that t? = (Aß)ß...

  9. Tectonic Settings | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand Jump to:Ezfeedflag JumpID-f <Maintained ByManagement Inc Place: Cleveland, Ohio Zip:Settings

  10. Berkeley Lab Compact Accelerator Sets World Record

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

    Berkeley Lab Particle Accelerator Sets World Record Berkeley Lab Particle Accelerator Sets World Record Simulations at NERSC Help Validate Experimental Laser-Plasma Design December...

  11. empl-0004-09/09 Student Financial Affairs

    E-Print Network [OSTI]

    Pilyugin, Sergei S.

    rugs, clean rugs, etc. Lifting, moving, shelving books Moving furniture or supplies Painting analysis Data analysis/reduction Announcer (radio & TV) Literature searching Tape dubbing (radio) Field

  12. First `Winged' and `X'-shaped Radio Source Candidates

    SciTech Connect (OSTI)

    Cheung, C.C.

    2007-01-22T23:59:59.000Z

    A small number of double-lobed radio galaxies (17 from our own census of the literature) show an additional pair of low surface brightness ''wings'', thus forming an overall ''X''-shaped appearance. The origin of the wings in these radio sources is unclear. They may be the result of back-flowing plasma from the currently active radio lobes into an asymmetric medium surrounding the active nucleus, which would make these ideal systems in which to study thermal/non-thermal plasma interactions in extragalactic radio sources. Another possibility is that the wings are the aging radio lobes left over after a (rapid) realignment of the central supermassive black-hole/accretion disk system due perhaps to a merger. Generally, these models are not well tested; with the small number of known examples, previous works focused on detailed case studies of selected sources with little attempt at a systematic study of a large sample. Using the VLA-FIRST survey database, we are compiling a large sample of winged and X-shaped radio sources for such studies. As a first step toward this goal, an initial sample of 100 new candidate objects of this type are presented in this paper. The search process is described, optical identifications from available literature data, and basic radio data are presented. From the limited resolution FIRST images ({approx} 5''), we can already confidently classify a sufficient number of these objects as having the characteristic wing lengths >80% of the active lobes to more than double the number of known X-shaped radio sources. We have also included as candidates, radio sources with shorter wings (<80% wing to lobe length ratios), or simply ''winged'' sources, as it is probable that projection effects are important. Finally, among the candidates are four quasars (z=0.37 to 0.84), and several have morphologies suggestive of Fanaroff-Riley type-I (low-power) radio galaxies. While followup observations are necessary to confirm these identifications, this stresses the importance of source orientation and imaging limitations in finding these enigmatic objects.

  13. Commissioning of helium injector for coupled radio frequency quadrupole and separated function radio frequency quadrupole accelerator

    SciTech Connect (OSTI)

    Peng, Shixiang, E-mail: sxpeng@pku.edu.cn; Chen, Jia; Ren, Haitao; Zhao, Jie; Xu, Yuan; Zhang, Tao; Xia, Wenlong; Gao, Shuli; Wang, Zhi; Luo, Yuting; Guo, Zhiyu [SKLNPT and IHIP, School of Physics, Peking University, Beijing 100871 (China)] [SKLNPT and IHIP, School of Physics, Peking University, Beijing 100871 (China); Zhang, Ailing; Chen, Jia'er [SKLNPT and IHIP, School of Physics, Peking University, Beijing 100871 (China) [SKLNPT and IHIP, School of Physics, Peking University, Beijing 100871 (China); University of Chinese Academy of Sciences, Beijing 100049 (China)

    2014-02-15T23:59:59.000Z

    A project to study a new type of acceleration structure has been launched at Peking University, in which a traditional radio frequency quadrupole (RFQ) and a separated function radio frequency quadrupole are coupled in one cavity to accelerate the He+ beam. A helium injector for this project is developed. The injector consists of a 2.45 GHz permanent magnet electron cyclotron resonance ion source and a 1.16 m long low energy beam transport (LEBT). The commissioning of this injector was carried out and an onsite test was held in June 2013. A 14 mA He+ beam with the energy of 30 keV has been delivered to the end of the LEBT, where a diaphragm with the diameter of 7 mm is located. The position of the diaphragm corresponds to the entrance of the RFQ electrodes. The beam emittance and fraction were measured after the 7 mm diaphragm. Its rms emittance is about 0.14 ??mm?mrad and the fraction of He+ is about 99%.

  14. BASIS Set Exchange (BSE): Chemistry Basis Sets from the William R. Wiley Environmental Molecular Sciences Laboratory (EMSL) Basis Set Library

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Feller, D; Schuchardt, Karen L.; Didier, Brett T.; Elsethagen, Todd; Sun, Lisong; Gurumoorthi, Vidhya; Chase, Jared; Li, Jun

    The Basis Set Exchange (BSE) provides a web-based user interface for downloading and uploading Gaussian-type (GTO) basis sets, including effective core potentials (ECPs), from the EMSL Basis Set Library. It provides an improved user interface and capabilities over its predecessor, the EMSL Basis Set Order Form, for exploring the contents of the EMSL Basis Set Library. The popular Basis Set Order Form and underlying Basis Set Library were originally developed by Dr. David Feller and have been available from the EMSL webpages since 1994. BSE not only allows downloading of the more than 200 Basis sets in various formats; it allows users to annotate existing sets and to upload new sets. (Specialized Interface)

  15. The Radio/Xray Connection in Abell 2029 T.E. Clarke, E.L. Blanton, & C.L. Sarazin

    E-Print Network [OSTI]

    Sarazin, Craig

    The Radio/X­ray Connection in Abell 2029 T.E. Clarke, E.L. Blanton, & C.L. Sarazin Recent advances in galaxy clusters. One of the most spectacular results is the profound effect that the cluster­center radio are often host to powerful radio galaxies. Comparison of the radio and X­ray emission shows that the radio

  16. CORRELATION OF CHANDRA PHOTONS WITH THE RADIO GIANT PULSES FROM THE CRAB PULSAR

    SciTech Connect (OSTI)

    Bilous, A. V. [Department of Astronomy, University of Virginia, P.O. Box 400325, Charlottesville, VA 22904 (United States); McLaughlin, M. A. [Department of Physics, West Virginia University, Morgantown, WV 26506 (United States); Kondratiev, V. I. [Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo (Netherlands); Ransom, S. M., E-mail: avb3k@virginia.edu [National Radio Astronomy Observatory, Charlottesville, VA 22903 (United States)

    2012-04-10T23:59:59.000Z

    No apparent correlation was found between giant pulses (GPs) and X-ray photons from the Crab pulsar during 5.4 hr of simultaneous observations with the Green Bank Telescope at 1.5 GHz and Chandra X-Ray Observatory primarily in the energy range of 1.5-4.5 keV. During the Crab pulsar periods with GPs, the X-ray flux in radio emission phase windows does not change more than by {+-}10% for main pulse (MP) GPs and {+-}30% for interpulse (IP) GPs. During GPs themselves, the X-ray flux does not change by more than two times for MP GPs and five times for IP GPs. All limits quoted are compatible with 2{sigma} fluctuations of the X-ray flux around the sets of false GPs with random arrival times. The results speak in favor of changes in plasma coherence as the origin of GPs. However, the results do not rule out variations in the rate of particle creation if the particles that emit coherent radio emission are mostly at the lowest Landau level.

  17. RECOILING SUPERMASSIVE BLACK HOLES IN SPIN-FLIP RADIO GALAXIES

    SciTech Connect (OSTI)

    Liu, F. K.; Wang Dong [Department of Astronomy, Peking University, 100871 Beijing (China); Chen Xian, E-mail: fkliu@pku.edu.cn [Kavli Institute for Astronomy and Astrophysics, Peking University, 100871 Beijing (China)

    2012-02-20T23:59:59.000Z

    Numerical relativity simulations predict that coalescence of supermassive black hole (SMBH) binaries leads not only to a spin flip but also to a recoiling of the merger remnant SMBHs. In the literature, X-shaped radio sources are popularly suggested to be candidates for SMBH mergers with spin flip of jet-ejecting SMBHs. Here we investigate the spectral and spatial observational signatures of the recoiling SMBHs in radio sources undergoing black hole spin flip. Our results show that SMBHs in most spin-flip radio sources have mass ratio q {approx}> 0.3 with a minimum possible value q{sub min} {approx_equal} 0.05. For major mergers, the remnant SMBHs can get a kick velocity as high as 2100 km s{sup -1} in the direction within an angle {approx}< 40 Degree-Sign relative to the spin axes of remnant SMBHs, implying that recoiling quasars are biased to be with high Doppler-shifted broad emission lines while recoiling radio galaxies are biased to large apparent spatial off-center displacements. We also calculate the distribution functions of line-of-sight velocity and apparent spatial off-center displacements for spin-flip radio sources with different apparent jet reorientation angles. Our results show that the larger the apparent jet reorientation angle is, the larger the Doppler-shifting recoiling velocity and apparent spatial off-center displacement will be. We investigate the effects of recoiling velocity on the dust torus in spin-flip radio sources and suggest that recoiling of SMBHs would lead to 'dust-poor' active galactic nuclei. Finally, we collect a sample of 19 X-shaped radio objects and for each object give the probability of detecting the predicted signatures of recoiling SMBH.

  18. Fast Radio Bursts from Axion Stars

    E-Print Network [OSTI]

    Aiichi Iwazaki

    2015-04-20T23:59:59.000Z

    Axions are one of the most promising candidates of dark matter. The axions have been shown to form miniclusters with masses $\\sim 10^{-12}M_{\\odot}$, some of which condense to form axion stars. We have recently shown a possible origin of fast radio bursts ( FRBs ) by assuming that the axion stars are main component of halos: FRBs arise from the collisions between the axion stars and neutron stars. It is remarkable that the masses of the axion stars obtained by the comparison of the theoretical and observational event rates are coincident with the mass $\\sim 10^{-12}M_{\\odot}$. In this paper, we describe our model of FRBs in detail. We derive the approximate solutions of the axion stars with large radii and constraint their masses for the approximation to be valid. The FRBs are emitted from the atmospheres of neutron stars in the collisions. By calculating the optical depth of the atmospheres, we show that they are transparent for the radiations with the frequency given by the axion mass $m_a$ such as $m_a/2\\pi\\simeq 2.4$GHz$(m_a/10^{-5}\\rm eV)$. Although the radiations are linearly polarized when they are emitted, they are shown to be circularly polarized after they pass magnetospheres of neutron stars. We also show that the frequencies of the FRBs have finite bandwidths owing to the Doppler effect when the neutron stars pass through the axion stars. The presence of the finite bandwidths is a distinctive feature of our model and can be tested observationally. Furthermore, we show that similar FRBs may arise when the axion stars collide with magnetic white dwarfs. The characteristic feature is that the durations of the bursts are of the order of $0.1$second and they are monochromatic contrary to the FRBs observed. We can determine the axion mass by the observating both of the their frequencies and red shifts $z$.

  19. Contagious Sets in Random Graphs Uriel Feige

    E-Print Network [OSTI]

    Contagious Sets in Random Graphs Uriel Feige Michael Krivelevich Daniel Reichman August 10, 2014. A contagious set is a set whose activation results with the entire graph being active. Given a graph G, let m(G, 2) be the minimal size of a contagious set. We consider the binomial random graph G := G(n, p

  20. Math 566: Axiomatic Set Theory Spring 2009

    E-Print Network [OSTI]

    Basic Set Theory Definition (Axiom of Choice (AC)). If F is a family of non-empty sets, then thereMath 566: Axiomatic Set Theory Spring 2009 Professor: Simon Thomas Note-taker: Jay Williams #12;Contents 1 Basic Set Theory 3 1.1 The ordinals

  1. MATH 230A, FALL 2010, PROBLEM SET 9 DUE NOVEMBER 3

    E-Print Network [OSTI]

    Cotton-Clay, Andrew

    ) is smooth of dimension m - n for each p. Let Tv M TM denote ker , and let Th M TM denote the orthogonal field X on N has a unique horizontal lift we denote h(X) on M, a section of Th M such that h(X) = X.e. a section of Tv M. Let M denote the Levi-Civita connection on M and N denote the Levi-Civita connection on N

  2. In Search of the Audience - Forty Years of German Public Television and Its Audience Driven Commercialization

    E-Print Network [OSTI]

    Goebel, Baerbel

    2011-04-11T23:59:59.000Z

    and child murder was a main part of the narrative created an explosive cross-connection. Tatort has a responsibility to its viewers, as the constant use of national, regional and local markers supply a high amount of realism to its viewers, and result in a... as a crime-comedy, is significantly younger then the general viewing audience of Tatort (Henke, 2009). This detective team also has among the highest ratings with 25 percent of the market share on a premiere night. The fact that murder is comedic marks...

  3. Farm and home television viewing habits and preferences of Caldwell County residents in 1955

    E-Print Network [OSTI]

    Sloan, Jack Thomas

    1956-01-01T23:59:59.000Z

    4 4, ~ I ~ 1 4'4 ii I ?-p I 4 h 0 0 ii + I QQ)86'MV85 Qf 84QCQ oyy ~ e4iii, ee ~ sy. cwk ~ e"ii. eye++ i i'i RSVRIW, Qf Xeki@X'SC@VQ eeiiei ~y, q+, +'y'+~?+i?pwee, 'eo 6' - 585264'44@@/. i'aeppi ty'spa' ~ wyygs'+'w+w+~ii'eiii+s+'+y' P~~s e s a... s s s as a s see e's ~ XS 0, 0y~Qm? Qf XQQyquaeSICS. tQVaVQ gzkaey 88 8 CWXVen9PXt day fQX' Vi88iag the VQWn 884 CMKEPg glPQQf'488 e ~ eaeosseo'oeoeo ~ esass ~ e eeeeoes 26 5. 0PXmiQ@8 Qf Z'eeyQSI@88t8 Coax'6 MQ XQP. hQQ2; 88 8 eonVagg88t Ciea foz...

  4. Losing Sight of Ourselves: A Theoretical Analysis of Reality Television in the United States

    E-Print Network [OSTI]

    Collins, Megan E

    2014-06-11T23:59:59.000Z

    world from the moment we are born. Today, births are recorded, photographed, posted on Facebook and tweeted. The growth of a child is tracked and photographed then posted for all the parent’s Facebook friends to follow. Does the child have a choice... front for yourself? In today’s world we can present ourselves as we like via social media avenues such as Facebook. I want people to see me as this type of person who likes certain types of people, food, activities, movies, products. Does presenting...

  5. Mickey and the Mouse: The Motion Picture and Television Industry's Copyright Concerns on the Internet

    E-Print Network [OSTI]

    Torpoco, Mark S.

    1997-01-01T23:59:59.000Z

    on-line services from liability for infringing transmissionsline service providers from direct or vicarious copyright liability for transmissions

  6. A Funny Thing Happened on the Way to the Cinema: Shakespeare's Comedies in Film and Television

    E-Print Network [OSTI]

    Lamb, Wendy Nicole

    2010-01-01T23:59:59.000Z

    would have projected onto the city of Ephesus based on St.Paul's visit to Ephesus as detailed in chapter nineteen ofthe entrance of the Duke of Ephesus and Egeon, a merchant of

  7. Popular Television and Visual Culture: Intentions and Perceptions of Aliens in America

    E-Print Network [OSTI]

    Sourdot, Ludovic A.

    2010-10-12T23:59:59.000Z

    . The Tolchuks anticipate that their teenage son Justin will become more popular at school by associating with an international student. In the first episode, their plan takes an unexpected turn when the family expecting to host a blond-haired, blue...-eyed Scandinavian high school student, instead meets Raja, a Muslim teenager from Pakistan. The title of the show, Aliens in America, is a play on words in that the lead characters, Justin an American student and Raja a Pakistani exchange 12 student, are both...

  8. Audience Response & Disability Representation in Four Film and Television Dramas: A Qualitative Audience Study

    E-Print Network [OSTI]

    Arenas Velez, Fernando

    2008-03-20T23:59:59.000Z

    . ?Realism?: Comparing Movies to Life, 151 vi Chapter 5. The Sea Inside and The Brooke Ellison Story: Truth, Lies and the ?Based on a True Story? Disability (Melo)Drama, 164 Truth and Lies in Adaptation, 168 A Movie or a Film: Distinctions of Ethics and Taste...

  9. Dis/locating audience : transnational media flows and the online circulation of East Asian television drama

    E-Print Network [OSTI]

    Li, Xiaochang, S.M. Massachusetts Institute of Technology

    2009-01-01T23:59:59.000Z

    It is commonly accepted that media and communication technologies play pivotal roles in the complex processes of what is broadly termed "globalization." The increasing speed, volume, and scale of transnational circulation ...

  10. CMOS RF front-end design for terrestrial and mobile digital television systems

    E-Print Network [OSTI]

    Xiao, Jianhong

    2007-09-17T23:59:59.000Z

    architecture……………………………………… 24 Fig. 2.10. Single stage passive polyphase filter…………………………………………… 26 Fig. 2.11. Schematic of broadband quadrature generator…………………………………. 27 Fig. 2.12. Frequency response plot of: (a) quadrature generator; (b) image rejection... (single-ended)…………………. 80 Fig. 4.6. Block diagram of the proposed RFVGA architecture……………………………. 81 Fig. 4.7. Simplified schematic of the current-steering Gm stage………………………….. 82 Fig. 4.8. Broadband impedance matching configurations…………………………………. 85...

  11. Democracy and the political ascendancy of broadcast television in Latin America : 1950 through 1970

    E-Print Network [OSTI]

    Simón, Harry L.

    2009-01-01T23:59:59.000Z

    democracy, 2 nd term) Chile (Alessandri Rodríguez democracy)Chile, in 1959, under the Alessandri democracy. Of course,

  12. Screaming, flying, and laughing: magical feminism's witches in contemporary film, television, and novels

    E-Print Network [OSTI]

    Wells, Kimberly Ann

    2007-09-17T23:59:59.000Z

    differences from the already well known social-protest genre of Magical Realism. The texts examined include Nalo Hopkinson’s Brown Girl in the Ring (1998), Alice Hoffman’s Practical Magic (1996), Chitra Divakaruni’s Mistress of Spices (1997), 5 Sean Stewart.... These witches are women who make their own rules, frequently in opposition to patriarchal ones that say a woman should endure abuse, suppress her own desires and choices in favor of those of her husband, or father, or accept her fate as powerless victim...

  13. Covering the story: a rhetorical analysis of Brownsville's television news coverage

    E-Print Network [OSTI]

    Groenendyk, Kathi Lynn

    1994-01-01T23:59:59.000Z

    , and the accentuation of risk and drama in the news. But not all environmental communication research involves the media. For example, Petermn and Peterson (1993) examine how nonmarket economic valuation methods constrained policy in both the Exxon Valdez disaster... and with endangered whooping cranes. In the Exxon case, Peterson and Peterson argue that "the cultural damage to area residents cannot be appropriately measured in dollars" (p. 61). The nonmarket economic valuation methods also allow shipping of petrochemicals...

  14. Watch the Watts: Tips for Buying a New Television | 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 742EnergyOn AprilA group currentBradley Nickell Director ofDepartmentDRAFTEnergy Review -Jeannie

  15. How Do You Reduce the Amount of Energy Used by Your Televisions...

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

    Gerrity. The New EnergySaver.gov -- Save Money by Saving Energy Did you know: Water heaters account for nearly 17 percent of a home's energy use, consuming more energy...

  16. Answers to the set revision exercise 1 Answers to the set revision exercise

    E-Print Network [OSTI]

    Alechina, Natasha

    to the set revision exercise 5 Answers to the set revision exercise · If A has k elements, how many different1 Answers to the set revision exercise 1 Answers to the set revision exercise · Are A = {1 in which they are listed does not matter. Answers to the set revision exercise 2 Answers to the set

  17. Breaking FIR-Radio Correlation: The Case of Interacting Galaxies

    E-Print Network [OSTI]

    Donevski, Darko

    2015-01-01T23:59:59.000Z

    Far-infrared (FIR)--radio correlation is a well-established empirical connection between continuum radio and dust emission of star-forming galaxies, used as a tool in determining star-formation rates. Here we point out that in the case of interacting star-forming galaxies this tool might break. Galactic interactions and mergers have been known to give rise to tidal shocks and disrupt morphologies especially in the smaller of the interacting components. Moreover, these shocks can also heat the gas and dust and accelerate particles leading to tidal cosmic-ray population in addition to standard galactic cosmic rays. Both heating and additional non-thermal radiation will obviously affect the FIR-radio correlation of these systems. To test this hypothesis we have analyzed a sample of 43 infrared bright star-forming interacting galaxies at different merger stages. We have found that their FIR-radio correlation parameter and radio emission spectral index vary over different merger stages and behave as it would be ex...

  18. A RADIO-LOUD MAGNETAR IN X-RAY QUIESCENCE

    SciTech Connect (OSTI)

    Levin, Lina; Bailes, Matthew; Bhat, N. D. Ramesh; Burke-Spolaor, Sarah; Van Straten, Willem [Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Mail H39, P.O. Box 218, VIC 3122 (Australia); Bates, Samuel; Kramer, Michael; Stappers, Ben [Jodrell Bank Centre for Astrophysics, University of Manchester, Alan Turing Building, Oxford Road, Manchester M13 9PL (United Kingdom); Burgay, Marta; D'Amico, Nichi; Milia, Sabrina; Possenti, Andrea [INAF/Osservatorio Astronomico di Cagliari, localita Poggio dei Pini, strada 54, 09012 Capoterra (Italy); Johnston, Simon; Keith, Michael [Australia Telescope National Facility-CSIRO, P.O. Box 76, Epping, NSW 1710 (Australia); Rea, Nanda [Institut de Ciencies de l'Espai (CSIC-IEEC), Campus UAB, Facultat de Ciencies, Torre C5-parell, 08193 Barcelona (Spain)

    2010-09-20T23:59:59.000Z

    As part of a survey for radio pulsars with the Parkes 64 m telescope, we have discovered PSR J1622-4950, a pulsar with a 4.3 s rotation period. Follow-up observations show that the pulsar has the highest inferred surface magnetic field of the known radio pulsars (B {approx}3 x 10{sup 14} G), and it exhibits significant timing noise and appears to have an inverted spectrum. Unlike the vast majority of the known pulsar population, PSR J1622-4950 appears to switch off for many hundreds of days and even in its on-state exhibits extreme variability in its flux density. Furthermore, the integrated pulse profile changes shape with epoch. All of these properties are remarkably similar to the only two magnetars previously known to emit radio pulsations. The position of PSR J1622-4950 is coincident with an X-ray source that, unlike the other radio pulsating magnetars, was found to be in quiescence. We conclude that our newly discovered pulsar is a magnetar-the first to be discovered via its radio emission.

  19. Antenna system characteristic and solar radio burst observation

    E-Print Network [OSTI]

    Li, Sha; Chen, Zhijun; Wang, Wei; Liu, Donghao

    2015-01-01T23:59:59.000Z

    Chinese Spectral Radio Heliograph (CSRH) is an advanced aperture synthesis solar radio heliograph, developed by National Astronomical Observatories, Chinese Academy of Sciences independently. It consists of 100 reflector antennas, which are grouped into two antenna arrays (CSRH-I and CSRH-II) for low and high frequency bands respectively. The frequency band of CSRH-I is 0.4-2GHz and for CSRH-II, the frequency band is 2-15GHz. In the antenna and feed system, CSRH uses an Eleven feed to receive signals coming from the Sun, the radiation pattern with lower side lobe and back lobe of the feed is well radiated. The characteristics of gain G and antenna noise temperature T effect the quality of solar radio imaging. For CSRH, measured G is larger than 60 dBi and $ T $ is less than 120K, after CSRH-I was established, we have successfully captured a solar radio burst between 1.2-1.6GHz on November 12, 2010 through this instrument and this event was confirmed through the observation of Solar Broadband Radio Spectromete...

  20. Dominant Nuclear Outflow Driving Mechanisms in Powerful Radio Galaxies

    E-Print Network [OSTI]

    Dan Batcheldor; Clive Tadhunter; Joanna Holt; Raffaella Morganti; Christopher P. O'Dea; David J. Axon; Anton Koekemoer

    2007-02-20T23:59:59.000Z

    In order to identify the dominant nuclear outflow mechanisms in Active Galactic Nuclei, we have undertaken deep, high resolution observations of two compact radio sources (PKS 1549-79 and PKS 1345+12) with the Advanced Camera for Surveys (ACS) aboard the Hubble Space Telescope. Not only are these targets known to have powerful emission line outflows, but they also contain all the potential drivers for the outflows: relativistic jets, quasar nuclei and starbursts. ACS allows the compact nature (nuclear position angles of both the optical emission line and radio data. There is no evidence for bi-conical emission line features on the large-scale and there is a divergance in the relative position angles of the optical and radio structure. This enables us to exclude starburst driven outflows. However, we are unable to clearly distinguish between radiative AGN wind driven outflows and outflows powered by relativistic radio jets. The small scale bi-conical features, indicative of such mechanisms could be below the resolution limit of ACS, especially if aligned close to the line of sight. In addition, there may be offsets between the radio and optical nuclei induced by heavy dust obscuration, nebular continuum or scattered light from the AGN.

  1. Giant radio galaxies - II. Tracers of large-scale structure

    E-Print Network [OSTI]

    Malarecki, J M; Saripalli, L; Staveley-Smith, L; Subrahmanyan, R

    2015-01-01T23:59:59.000Z

    We have carried out optical spectroscopy with the Anglo-Australian Telescope for 24,726 objects surrounding a sample of 19 Giant Radio Galaxies (GRGs) selected to have redshifts in the range 0.05 to 0.15 and projected linear sizes from 0.8 to 3.2 Mpc. Such radio galaxies are ideal candidates to study the Warm-Hot Intergalactic Medium (WHIM) because their radio lobes extend beyond the ISM and halos of their host galaxies, and into the tenuous IGM. We were able to measure redshifts for 9,076 galaxies. Radio imaging of each GRG, including high-sensitivity, wideband radio observations from the Australia Telescope Compact Array for 12 GRGs and host optical spectra (presented in a previous paper, Malarecki et al. 2013), is used in conjunction with the surrounding galaxy redshifts to trace large-scale structure. We find that the mean galaxy number overdensity in volumes of ~700 Mpc$^3$ near the GRG host galaxies is ~70 indicating an overdense but non-virialized environment. A Fourier component analysis is used to qu...

  2. On the application of radio frequency voltages to ion traps via helical resonators

    E-Print Network [OSTI]

    J. D. Siverns; L. R. Simkins; S. Weidt; W. K. Hensinger

    2011-10-18T23:59:59.000Z

    Ions confined using a Paul trap require a stable, high voltage and low noise radio frequency (RF) potential. We present a guide for the design and construction of a helical coil resonator for a desired frequency that maximises the quality factor for a set of experimental constraints. We provide an in-depth analysis of the system formed from a shielded helical coil and an ion trap by treating the system as a lumped element model. This allows us to predict the resonant frequency and quality factor in terms of the physical parameters of the resonator and the properties of the ion trap. We also compare theoretical predictions with experimental data for different resonators, and predict the voltage applied to the ion trap as a function of the Q-factor, input power and the properties of the resonant circuit.

  3. Radio Jets in Galaxies with Actively Accreting Black Holes: new insights from the SDSS

    E-Print Network [OSTI]

    Guinevere Kauffmann; Timothy M. Heckman; Philip N. Best

    2007-09-19T23:59:59.000Z

    The majority of nearby radio-loud AGN are found in massive, old elliptical galaxies with weak emission lines. At high redshifts,however, most known radio AGN have strong emission lines. In this paper, we examine a subset of radio AGN with emission lines selected from the Sloan Digital Sky Survey. The probability for a nearby radio AGN to have emission lines is a strongly decreasing function of galaxy mass and an increasing function of radio luminosity above 10^25 W/Hz. Emission line and radio luminosities are correlated, but with large dispersion. At a given radio power, AGN with small black holes have higher [OIII] luminosities (which we interpret as higher accretion rates) than AGN with big black holes. However, if we scale both radio and emission line luminosities by the black hole mass, we find a correlation between normalized radio power and accretion rate in Eddington units that is independent of black hole mass. There is also a clear correlation between normalized radio power and the age of the stellar population in the galaxy. Present-day AGN with the highest normalized radio powers are confined to galaxies with small black holes. High-redshift, high radio-luminosity AGN could be explained if big black holes were similarly active at earlier cosmic epochs. To investigate why only a small fraction of emission line AGN become radio loud, we create matched samples of radio-loud and radio-quiet AGN and compare their host galaxy properties and environments. The main difference lies in their environments; our local density estimates are a factor 2 larger around the radio-loud AGN. We propose a scenario in which radio-loud AGN with emission lines are located in galaxies where accretion of both cold and hot gas can occur simultaneously. (Abridged)

  4. Breakthrough: Record-Setting Cavity

    ScienceCinema (OSTI)

    Ciovati, Gianluigi

    2014-05-21T23:59:59.000Z

    Gianluigi "Gigi" Ciovati, a superconducting radiofrequency scientist, discusses how scientists at the U.S. Department of Energy's Jefferson Lab in Newport News, VA, used ARRA funds to fabricate a niobium cavity for superconducting radiofrequency accelerators that has set a world record for energy efficiency. Jefferson Lab's scientists developed a new, super-hot treatment process that could soon make it possible to produce cavities more quickly and at less cost, benefitting research and healthcare around the world. Accelerators are critical to our efforts to study the structure of matter that builds our visible universe. They also are used to produce medical isotopes and particle beams for diagnosing and eradicating disease. And they offer the potential to power future nuclear power plants that produce little or no radioactive waste.around the world. Accelerators are critical to our efforts to study the structure of matter that builds our visible universe. They also are used to produce medical isotopes and particle beams for diagnosing and eradicating disease. And they offer the potential to power future nuclear power plants that produce little or no radioactive waste.

  5. Dynamical friction of radio galaxies in galaxy clusters

    E-Print Network [OSTI]

    Biman B. Nath

    2008-04-22T23:59:59.000Z

    The distribution of luminous radio galaxies in galaxy clusters has been observed to be concentrated in the inner region. We consider the role of dynamical friction of massive galaxies ($M\\sim 10^{12.5}$ M$_{\\odot}$), assuming them to be hosts of luminous radio galaxies, and show that beginning with a Navarro-Frenk-White density profile of a cluster of mass $M_{cl}\\sim 10^{15}$ M$_{\\odot}$ of concentration $c\\sim 5$ and collapsing at $z\\sim 1$, the density profile of radio galaxies evolve to a profile of concentration $c \\sim 25$, as observed, in a time scale of $t\\sim 3\\hbox{--}5$ Gyr.

  6. Multiphase turbulent interstellar medium: some recent results from radio astronomy

    E-Print Network [OSTI]

    Roy, Nirupam

    2015-01-01T23:59:59.000Z

    The radio frequency 1.4 GHz transition of the atomic hydrogen is one of the important tracers of the diffuse neutral interstellar medium. Radio astronomical observations of this transition, using either a single dish telescope or an array interferometer, reveal different properties of the interstellar medium. Such observations are particularly useful to study the multiphase nature and turbulence in the interstellar gas. Observations with multiple radio telescopes have recently been used to study these two closely related aspects in greater detail. Using various observational techniques, the density and the velocity fluctuations in the Galactic interstellar medium was found to have a Kolmogorov-like power law power spectra. The observed power law scaling of the turbulent velocity dispersion with the length scale can be used to derive the true temperature distribution of the medium. Observations from a large ongoing atomic hydrogen absorption line survey have also been used to study the distribution of gas at d...

  7. Mid Infrared Spectra of Radio Galaxies and Quasars

    E-Print Network [OSTI]

    Ogle, P M; Whysong, D

    2006-01-01T23:59:59.000Z

    Spitzer Infrared Spectrograph (IRS) observations of 3C radio galaxies and quasars shed new light on the nature of the central engines of AGN. Emission from silicate dust obscuring the central engine can be used to estimate the bolometric luminosity of an AGN. Emission lines from ions such as O IV and Ne V give another indication of the presence or lack of a hidden source of far-UV photons in the nucleus. Radio-loud AGN with relative-to-Eddington luminosity ratios of L/L_Edd hydrogen pure-rotational emission lines are also seen in some mid-IR weak radio galaxies, caused by either merger shocks or jet shocks in the interstellar medium.

  8. Mid Infrared Spectra of Radio Galaxies and Quasars

    E-Print Network [OSTI]

    P. M. Ogle; R. R. J. Antonucci; D. Whysong

    2006-12-15T23:59:59.000Z

    Spitzer Infrared Spectrograph (IRS) observations of 3C radio galaxies and quasars shed new light on the nature of the central engines of AGN. Emission from silicate dust obscuring the central engine can be used to estimate the bolometric luminosity of an AGN. Emission lines from ions such as O IV and Ne V give another indication of the presence or lack of a hidden source of far-UV photons in the nucleus. Radio-loud AGN with relative-to-Eddington luminosity ratios of L/L_Edd hydrogen pure-rotational emission lines are also seen in some mid-IR weak radio galaxies, caused by either merger shocks or jet shocks in the interstellar medium.

  9. Radio Galaxies in Cooling Cores: Insights from a Complete Sample

    E-Print Network [OSTI]

    J. A. Eilek; F. N. Owen

    2006-12-04T23:59:59.000Z

    We have observed a new, complete, cooling-core sample with the VLA, in order to understand how the massive black hole in the central galaxy interacts with the local cluster plasma. We find that every cooling core is currently being energized by an active radio jet, which has probably been destabilized by its interaction with the cooling core. We argue that current models of cooling-core radio galaxies need to be improved before they can be used to determine the rate at which the jet is heating the cooling core. We also argue that the extended radio haloes we see in many cooling-core clusters need extended, in situ re-energization, which cannot be supplied solely by the central galaxy.

  10. Optical and Radio monitoring of S5 1803+74

    E-Print Network [OSTI]

    R. Nesci; E. Massaro; M. Maesano; F. Montagni; S. Sclavi; T. Venturi; D. Dallacasa; F. D'Alessio

    2002-04-22T23:59:59.000Z

    The optical (BVRI) and radio (8.4 GHz) light curves of S5 1803+784 on a time span of nearly 6 years are presented and discussed. The optical light curve showed an overall variation greater than 3 mag, and the largest changes occured in three strong flares. No periodicity was found in the light curve on time scales up to a year. The variability in the radio band is very different, and shows moderate oscillations around an average constant flux density rather than relevant flares, with a maximum amplitude of $\\sim$30%, without a simultaneous correspondence between optical and radio luminosity. The optical spectral energy distribution was always well fitted by a power law. The spectral index shows small variations and there is indication of a positive correlation with the source luminosity. Possible explanations of the source behaviour are discussed in the framework of current models.

  11. Storm in a "Teacup": a radio-quiet quasar with ~10kpc radio-emitting bubbles and extreme gas kinematics

    E-Print Network [OSTI]

    Harrison, C M; Alexander, D M; Bauer, F E; Edge, A C; Hogan, M T; Mullaney, J R; Swinbank, A M

    2014-01-01T23:59:59.000Z

    We present multi-frequency (1-8 GHz) VLA data, combined with VIMOS IFU data and HST imaging, of a z=0.085 radio-quiet type 2 quasar (with L(1.4GHz)~5e23 W/Hz and L(AGN)~2e45 erg/s). Due to the morphology of its emission-line region, the target (J1430+1339) has been referred to as the Teacup AGN in the literature. We identify "bubbles" of radio emission that are extended ~10-12 kpc to both the east and west of the nucleus. The edge of the brighter eastern bubble is co-spatial with an arc of luminous ionized gas. We also show that the Teacup AGN hosts a compact radio structure, located ~0.8 kpc from the core position, at the base of the eastern bubble. This radio structure is co-spatial with an ionized outflow with an observed velocity of v=-760 km/s. This is likely to correspond to a jet, or possibly a quasar wind, interacting with the interstellar medium at this position. The large-scale radio bubbles appear to be inflated by the central AGN, which indicates that the AGN can also interact with the gas on >~10...

  12. Radio Remote Sensing of the Corona and the Solar Wind

    E-Print Network [OSTI]

    Steven R. Spangler; Catherine A. Whiting

    2008-09-26T23:59:59.000Z

    Modern radio telescopes are extremely sensitive to plasma on the line of sight from a radio source to the antenna. Plasmas in the corona and solar wind produce measurable changes in the radio wave amplitude and phase, and the phase difference between wave fields of opposite circular polarization. Such measurements can be made of radio waves from spacecraft transmitters and extragalactic radio sources, using radio telescopes and spacecraft tracking antennas. Data have been taken at frequencies from about 80 MHz to 8000 MHz. Lower frequencies probe plasma at greater heliocentric distances. Analysis of these data yields information on the plasma density, density fluctuations, and plasma flow speeds in the corona and solar wind, and on the magnetic field in the solar corona. This paper will concentrate on the information that can be obtained from measurements of Faraday rotation through the corona and inner solar wind. The magnitude of Faraday rotation is proportional to the line of sight integral of the plasma density and the line-of-sight component of the magnetic field. Faraday rotation provides an almost unique means of estimating the magnetic field in this part of space. This technique has contributed to measurement of the large scale coronal magnetic field, the properties of electromagnetic turbulence in the corona, possible detection of electrical currents in the corona, and probing of the internal structure of coronal mass ejections (CMEs). This paper concentrates on the search for small-scale coronal turbulence and remote sensing of the structure of CMEs. Future investigations with the Expanded Very Large Array (EVLA) or Murchison Widefield Array (MWA) could provide unique observational input on the astrophysics of CMEs.

  13. Fourier Modeling of the Radio Torus Surrounding Supernova 1987A

    E-Print Network [OSTI]

    C. -Y. Ng; B. M. Gaensler; L. Staveley-Smith; R. N. Manchester; M. J. Kesteven; L. Ball; A. K. Tzioumis

    2008-05-27T23:59:59.000Z

    We present detailed Fourier modeling of the radio remnant of Supernova 1987A, using high-resolution 9 GHz and 18 GHz data taken with the Australia Telescope Compact Array over the period 1992 to 2008. We develop a parameterized three-dimensional torus model for the expanding radio shell, in which the emission is confined to an inclined equatorial belt; our model also incorporates both a correction for light travel-time effects and an overall east-west gradient in the radio emissivity. By deriving an analytic expression for the two-dimensional Fourier transform of the projected three-dimensional brightness distribution, we can fit our spatial model directly to the interferometric visibility data. This provides robust estimates to the radio morphology at each epoch. The best-fit results suggest a constant remnant expansion at 4000 +/- 400 km/s over the 16-year period covered by the observations. The model fits also indicate substantial mid-latitude emission, extending to 40 degree on either side of the equatorial plane. This likely corresponds to the extra-planar structure seen in H$\\alpha$ and Ly$\\alpha$ emission from the supernova reverse shock, and broadly supports hydrodynamic models in which the complex circumstellar environment was produced by a progression of interacting winds from the progenitor. Our model quantifies the clear asymmetry seen in the radio images: we find that the eastern half of the radio remnant is consistently ~40 brighter than the western half at all epochs, which may result from an asymmetry in the ejecta distribution between these two hemispheres.

  14. A Two-Dimensional Model of Chemical Vapor Infiltration With Radio Frequency Heating

    E-Print Network [OSTI]

    Economou, Demetre J.

    either in a conven- tional microwave oven or by using a radio frequency (RF) induction coil-consistently the power absorbed by the preform from a radio frequency induction coil. The model equations were solved

  15. Spectral indices of Galactic radio loops between 1420, 820 and 408 MHz

    E-Print Network [OSTI]

    V. Borka

    2007-02-10T23:59:59.000Z

    In this paper the average brightness temperatures and surface brightnesses at 1420, 820 and 408 MHz of the six main Galactic radio-continuum loops are derived, as are their radio spectral indices. The temperatures and surface brightnesses of the radio loops are computed using data taken from radio continuum surveys at 1420, 820 and 408 MHz. We have demonstrated the reality of Loops V and VI and present diagrams of their spectra for the first time. We derived the radio spectral indices of Galactic radio loops from radio surveys at three frequencies (1420, 820 and 408 MHz) and confirm them to be non-thermal sources. Diameters and distances of Loops I-VI were also calculated. The results obtained are in good agreement with current theories of supernova remnant (SNR) evolution and suggest that radio loops may have a SNR origin.

  16. Upfront Radio on WMUA 91.1FM Wednesday's @ 4:30-5:30PM

    E-Print Network [OSTI]

    Mullin, William J.

    Upfront Radio on WMUA 91.1FM Wednesday's @ 4:30-5:30PM Show Announcement as the "God Particle" in the popular press. Upfront Radio will speak with UMass

  17. Cultured men, uncultured women : an exploration of the gendered hierarchy of taste governing Afghan radio

    E-Print Network [OSTI]

    Kamal, Sarah

    2005-01-01T23:59:59.000Z

    After years of strict bans on the media, local radio in post-Taliban Afghanistan is undergoing an intense period of reconstruction. This thesis uses a multi-sited ethnographic investigation to examine local Afghan radio's ...

  18. Discovery of Correlated Behavior Between the HXR and the Radio Bands in Cygnus X-3

    E-Print Network [OSTI]

    M. L. McCollough; C. R. Robinson; S. N. Zhang; B. A. Harmon; R. M. Hjellming; E. B. Waltman; R. S. Foster; F. D. Ghigo; M. S. Briggs; G. N. Pendleton; K. J. Johnston

    1998-10-14T23:59:59.000Z

    Using CGRO/BATSE hard X-ray (HXR) data and GHz radio monitoring data from the Green Bank Interferometer (GBI), we have performed a long term study ($\\sim$ 1800 days) of the unusual X-ray binary Cyg X-3 resulting in the discovery of a remarkable relationship between these two wavelength bands. We find that, during quiescent radio states, the radio flux is strongly anticorrelated with the intensity of the HXR emission. The relationship switches to a correlation with the onset of major radio flaring activity. During major radio flaring activity the HXR drops to a very low intensity during quenching in the radio and recovers during the radio flare. Injection of plasma into the radio jets of Cyg X-3 occurs during changes in the HXR emission and suggests that disk-related and jet-related components are responsible for the high energy emission.

  19. Robotic localization of hostile networked radio sources with a directional antenna

    E-Print Network [OSTI]

    Hu, Qiang

    2007-04-25T23:59:59.000Z

    propose a scheme to localize hostile networked radio sources based on the radio signal strength and communication protocol pattern analysis using a mobile robot with a directional antenna. We integrate a Particle Filter algorithm with a new sensing model...

  20. Opportunistic Spectrum Scheduling for Mobile Cognitive Radio Networks in White Space

    E-Print Network [OSTI]

    California at Davis, University of

    by the PU, and transmission link failure could occur. A transmission link failure can be avoided by changing the transmission frequency, i.e., using a different channel. For example, during a period in which a channel on 120. Fortunately, in the white space, the PUs are commonly TV towers whose positions, interference range

  1. A Semi-automatic Search for Giant Radio Galaxy Candidates and their Radio-Optical Follow-up

    E-Print Network [OSTI]

    Santiago-Bautista, I del C; Andernach, H; Coziol, R; Torres-Papaqui, J P; Andrade, E F Jimenez; Plauchu-Frayn, I; Momjian, E

    2015-01-01T23:59:59.000Z

    We present results of a search for giant radio galaxies (GRGs) with a projected largest linear size in excess of 1 Mpc. We designed a computational algorithm to identify contiguous emission regions, large and elongated enough to serve as GRG candidates, and applied it to the entire 1.4-GHz NRAO VLA Sky survey (NVSS). In a subsequent visual inspection of 1000 such regions we discovered 15 new GRGs, as well as many other candidate GRGs, some of them previously reported, for which no redshift was known. Our follow-up spectroscopy of 25 of the brighter hosts using two 2.1-m telescopes in Mexico, and four fainter hosts with the 10.4-m Gran Telescopio Canarias (GTC), yielded another 24 GRGs. We also obtained higher-resolution radio images with the Karl G. Jansky Very Large Array for GRG candidates with inconclusive radio structures in NVSS.

  2. DIVIDE AND CONQUER ROADMAP FOR ALGEBRAIC SETS ...

    E-Print Network [OSTI]

    2014-06-24T23:59:59.000Z

    Jun 18, 2014 ... SAUGATA BASU AND MARIE-FRANÇOISE ROY .... pk,. (2) a finite subset of points of N ? Rp. The set V 0 and the finite set N are not arbitrary ...

  3. Deep radio observations of 3C 324 and 3C 368: evidence for jetcloud interactions

    E-Print Network [OSTI]

    Best, Philip

    Deep radio observations of 3C 324 and 3C 368: evidence for jet­cloud interactions P. N. Best,1 C. L form 1997 August 27 A B S T R AC T High-resolution, deep radio images are presented for two distant radio galaxies, 3C 324 (z ¼ 1:206) and 3C 368 (z ¼ 1:132), which are both prime examples of the radio

  4. JULIA SETS AND WILD CANTOR SETS ALASTAIR FLETCHER AND JANG-MEI WU

    E-Print Network [OSTI]

    Fletcher, Alastair

    JULIA SETS AND WILD CANTOR SETS ALASTAIR FLETCHER AND JANG-MEI WU Abstract. There exist uniformly quasiregular maps f : R3 R3 whose Julia sets are wild Cantor sets. 1. Introduction The most direct is not tame is called wild. The first example of a wild Cantor set was Antoine's necklace [1

  5. Logic and the set theory Lecture 20: The set theory (NS)

    E-Print Network [OSTI]

    Choi, Suhyoung

    Logic and the set theory Lecture 20: The set theory (NS) S. Choi Department of Mathematical Science KAIST, Daejeon, South Korea Fall semester, 2012 S. Choi (KAIST) Logic and set theory November 20, 2012 1 / 14 #12;Introduction About this lecture Further set theory S. Choi (KAIST) Logic and set theory

  6. Winter Energy Savings from Lower Thermostat Settings

    Reports and Publications (EIA)

    2000-01-01T23:59:59.000Z

    This discussion provides details on the effect of lowering thermostat settings during the winter heating months of 1997.

  7. October 2013 ENVIRONMENTAL SETTING, IMPACTS, AND MITIGATION

    E-Print Network [OSTI]

    Lee, Jason R.

    October 2013 4-1 CHAPTER 4 ENVIRONMENTAL SETTING, IMPACTS, AND MITIGATION MEASURES This chapter discusses the environmental setting, impacts, and mitigation measures for the 14 fully evaluated to measure changes that would result #12;Chapter 4 Environmental Setting, Impacts, and Mitigation Measures

  8. Screening and Evaluation Tool (SET) Users Guide

    SciTech Connect (OSTI)

    Layne Pincock

    2014-10-01T23:59:59.000Z

    This document is the users guide to using the Screening and Evaluation Tool (SET). SET is a tool for comparing multiple fuel cycle options against a common set of criteria and metrics. It does this using standard multi-attribute utility decision analysis methods.

  9. Level Set Implementations on Unstructured Point Cloud

    E-Print Network [OSTI]

    Duncan, James S.

    Level Set Implementations on Unstructured Point Cloud by HO, Hon Pong A Thesis Submitted;Level Set Implementations on Unstructured Point Cloud by HO, Hon Pong This is to certify that I have implementations on unstructured point cloud 15 3.1 Level set initialization

  10. On Topology Improvement of a Packet Radio Network by Power Control

    E-Print Network [OSTI]

    Tseng, Yu-Chee

    1 On Topology Improvement of a Packet Radio Network by Power Control Chi­Fu Huang and Yu­Chee Tseng extensively studied. However, in this paper we observe that the power control issue has been ignored by most, packet radio network (PRN), power control, wireless communication. I. INTRODUCTION T HE Packet Radio

  11. Radio Number for Square of Cycles Daphne Der-Fen Liu

    E-Print Network [OSTI]

    Liu, Daphne Der-Fen

    Radio Number for Square of Cycles Daphne Der-Fen Liu Melanie Xie Department of Mathematics and v. A radio labelling for G is a function f that assigns to each vertex a non- negative integer. The span of f is the difference of the maximum and the minimum labels assigned. The radio number of G

  12. Radio-frequency-mediated dipolar recoupling among half-integer quadrupolar spins

    E-Print Network [OSTI]

    Griffin, Robert G.

    Radio-frequency-mediated dipolar recoupling among half-integer quadrupolar spins Marc Baldus quadrupolar spins in the presence of an appropriate radio-frequency field. Experimental and theoretical in close spatial proximity. Unfortunately, most spin-1/2 methods involving radio frequency rf irradiation

  13. Using Radio Telemetry to Assess Movement Patterns in a Giant Rhinoceros Beetle: Are There Differences

    E-Print Network [OSTI]

    Emlen, Douglas J.

    Using Radio Telemetry to Assess Movement Patterns in a Giant Rhinoceros Beetle dichotomus . male dimorphism . movement . radio telemetry Introduction The Japanese horned beetle Trypoxylus of a radio-telemetry study that examined the movement patterns of T. dichotomus major males, minor males

  14. Radio morphology and spectral analysis of cD galaxies in rich and poor galaxy clusters

    E-Print Network [OSTI]

    S. Giacintucci; T. Venturi; M. Murgia; D. Dallacasa; R. Athreya; S. Bardelli; P. Mazzotta; D. J. Saikia

    2007-08-31T23:59:59.000Z

    We present a radio morphological study and spectral analysis for a sample of 13 cD galaxies in rich and poor clusters of galaxies.} Our study is based on new high sensitivity Giant Metrewave Radio Telescope (GMRT) observations at 1.28 GHz, 610 MHz and 235 MHz, and on archival data. From a statistical sample of cluster cD galaxies we selected those sources with little information available in the literature and promising for the detection of aged radio emission. Beyond the high sensitivity images for all 13 radio galaxies, we present also a detailed spectral analysis for 7 of them. We found a variety of morphologies and linear sizes, as typical for radio galaxies in the radio power range sampled here (low to intermediate power radio galaxies). The spectral analysis shows that 10/13 radio galaxies have steep radio spectrum, with spectral index $\\alpha \\ge 1$. In general, the radiative ages and growth velocities are consistent with previous findings that the evolution of radio galaxies at the cluster centres is affected by the dense external medium (i.e. low growth velocities and old ages. We suggest that the dominant galaxies in A 2622 and MKW 03s are dying radio sources, which at present are not fed by nuclear activity. On the other hand, the spectacular source at the centre of A 2372 might be a very interesting example of restarted radio galaxy. For this source we estimated a life cycle of the order of 10$^6$ yr.

  15. THE RADIO NUMBERS OF ALL GRAPHS OF ORDER n AND DIAMETER n -2

    E-Print Network [OSTI]

    Tomova, Maggy

    THE RADIO NUMBERS OF ALL GRAPHS OF ORDER n AND DIAMETER n - 2 KATHERINE BENSON, MATTHEW PORTER, AND MAGGY TOMOVA Abstract. A radio labeling of a connected graph G is a function c : V (G) Z+ such that for every two distinct vertices u and v of G distance(u, v) + |c(u) - c(v)| 1 + diameter(G). The radio

  16. USING RADIO-TELEMETRY TO DETERMINE RANGE AND RESOURCE REQUIREMENTS OF UPLAND SANDPIPERS AT AN EXPERIMENTALLY

    E-Print Network [OSTI]

    Sandercock, Brett K.

    USING RADIO-TELEMETRY TO DETERMINE RANGE AND RESOURCE REQUIREMENTS OF UPLAND SANDPIPERS birds with radio transmitters at the experimentally managed Konza Prairie Biological Station of radios on survival and movement, and optimizing the duration of transmitter attachment. We compared 4

  17. Radio frequency induced ionized collisional flow model for application at atmospheric pressures

    E-Print Network [OSTI]

    Roy, Subrata

    Radio frequency induced ionized collisional flow model for application at atmospheric pressures and radio frequency (rf) induced plasma-sheath dynamics, using multifluid equations. For the former, argon inherent in nonequilibrium discharges such as obtained through radio frequency (rf) or microwave excitation

  18. Radio self-interference cancellation by transmit beamforming, all-analog cancellation and blind digital tuning$

    E-Print Network [OSTI]

    Hua, Yingbo

    Radio self-interference cancellation by transmit beamforming, all-analog cancellation and blind September 2014 Accepted 17 September 2014 Available online 28 September 2014 Keywords: Radio self-interference cancellation Full-duplex radio Transmit beamforming Receive beamforming All-analog cancellation Blind digital

  19. RADIO TRACKING THE MOVEMENTS AND ACTIVITIES OF HARBOR PORPOISES, PHOCOENA PHOCOENA (L.), IN

    E-Print Network [OSTI]

    RADIO TRACKING THE MOVEMENTS AND ACTIVITIES OF HARBOR PORPOISES, PHOCOENA PHOCOENA (L.), IN THE BAY OF FUNDY, CANADA ANDREW J. READ AND DAVID E. GASKIN! ABSTRAcr Eight harbor porpoises were radio-tagged (172 of contact with radio-tagged animals ranged from 0.3 to 22.4 days. One harbor porpoise was tracked for 22

  20. E4.18 Radio Frequency Electronics Copyright 2006 Dr Stepan Lucyszyn Frequency Spectrum

    E-Print Network [OSTI]

    Papavassiliou, Christos

    Applications Phased-array radar Electronic warfare (e.g. Electronic Surveillance Measures, ECM, ECCM, decoysE4.18 Radio Frequency Electronics Copyright © 2006 Dr Stepan Lucyszyn Frequency Spectrum and Applications #12;E4.18 Radio Frequency Electronics Copyright © 2006 Dr Stepan Lucyszyn #12;E4.18 Radio

  1. Flux pinning characteristics in cylindrical niobium samples used for superconducting radio frequency cavity fabrication

    E-Print Network [OSTI]

    Flux pinning characteristics in cylindrical niobium samples used for superconducting radio.1088/0953-2048/25/6/065014 Flux pinning characteristics in cylindrical niobium samples used for superconducting radio frequency-grain (LG) and fine-grain (FG) niobium samples used for the fabrication of superconducting radio frequency

  2. A FUZZY GENETIC ALGORITHM FOR AUTOMATIC CHANNEL ASSIGNMENT FOR TACTICAL HF RADIO NETWORKS

    E-Print Network [OSTI]

    Kaminsky, Alan

    allocating chan- nels to groups of tactical HF radio nets is described. The method finds an optimal channel assignment that pro- vides good propagation for each net, as determined by propagation prediction models). Net Parameters. The radios are grouped into one or more networks, or nets. A particular radio can

  3. 4.1.1.6 Quiet and slowly varying radio emissions Arnold O. Benz

    E-Print Network [OSTI]

    4.1.1.6 Quiet and slowly varying radio emissions of the sun Arnold O. Benz The solar atmosphere emits radio emission at all wavelengths and at all times. Its total flux density varies with magnetic. It is reached when the sun has been free of spots for some weeks. This is called the quiet radio emission

  4. Power Supplies and Radio Frequency Department at Culham

    E-Print Network [OSTI]

    Power Supplies and Radio Frequency Department at Culham Culham Centre for Fusion Energy #12;We employ over 70 power electrical and power electronic engineers and technicians. The department supplies power to the JET and MAST nuclear fusion experiments at Culham. Culham is fed from the grid at 400k

  5. Secure MISO Cognitive Radio System with Perfect and Imperfect CSI

    E-Print Network [OSTI]

    Wong, Vincent

    Secure MISO Cognitive Radio System with Perfect and Imperfect CSI Taesoo Kwon, Vincent W.S. Wong eavesdrop on the primary link. This paper explores multiple-input single-output (MISO) CR systems where a multiple- input single-output (MISO) beamforming algorithm for the secondary system. However, it only

  6. NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia ELECTRONICS DIVISION INTERNAL REPORT the earth's axis and perpendic- ular to the Greenwich Meridian, call it the east-west plane. A telescope's rectangular cordinate components (x,y,z) are X = 882880.0208m Distance from the east-west plane, Greenwich

  7. NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia Electronics Division Internal Report which has been used on all systems mounted in the past at the 300-foot telescope. The East and West 14 are so made to allow the East and West 1410 MHz feeds to be positioned 2. 63, 5.24, 7.88 and 10. 52

  8. NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia

    E-Print Network [OSTI]

    Groppi, Christopher

    NATIONAL RADIO ASTRONOMY OBSERVATORY Green Bank, West Virginia Electronics Division Internal Report (Polarization) Focus Declination Beam East on Sky (Feed West of Center) Beam North to West on Sky (Feed North to West on Sky) Feed moves down toward surface Beam South on Sky Position Read- out Sign 300-FOOT

  9. A radio Search for high redshift HI absorption

    E-Print Network [OSTI]

    Jayaram N. Chengalur; A. G. de Bruyn; R. Braun; C. L. Carilli

    1995-12-12T23:59:59.000Z

    Ground based optical observations have yielded considerable information on the statistics of damped-lyman alpha systems. In particular these systems are known to be the dominant repository of the observed neutral gas at high redshift. However, particularly at high redshift, there is the possibility that optical observations could be biased due to the exclusion of damped-lyman alpha systems that contain moderate to significant amounts of dust. Independent observational constraints on the neutral hydrogen content at high redshifts and the amount of dust in high redshift systems can be obtained from a radio search against the bright lobes of distant radio galaxies (which is less affected by the presence of dust in foreground damped-lyman alpha systems). We describe here a pilot radio survey along the line of sight to a small sample of high redshift radio galaxies, and also present some preliminary results. The survey uses a novel observing mode at the WSRT which enables one to make sensitive searches of a large redshift interval in a modest amount of telescope time.

  10. Stochastic Power Control for Cellular Radio Systems \\Lambda

    E-Print Network [OSTI]

    Yates, Roy

    Stochastic Power Control for Cellular Radio Systems \\Lambda Sennur Ulukus Roy D. Yates July 11, iterative power control algorithms have been proposed to minimize transmitter powers while maintaining power control algorithms that use readily available measurements. Two classes of power control

  11. Soft Sensing and Optimal Power Control for Cognitive Radio

    E-Print Network [OSTI]

    Jafar, Syed A.

    Soft Sensing and Optimal Power Control for Cognitive Radio Sudhir Srinivasa and Syed Ali Jafar being present increases. We find that power control that maximizes the SNR is binary, i implementation at the secondary transmitter. With binary detection and binary power control, minimizing

  12. Radio astronomy in Africa: the case of Ghana

    E-Print Network [OSTI]

    Asabere, Bernard Duah; Horellou, Cathy; Winkler, Hartmut; Jarrett, Thomas

    2015-01-01T23:59:59.000Z

    South Africa has played a leading role in radio astronomy in Africa with the Hartebeesthoek Radio Astronomy Observatory (HartRAO). It continues to make strides with the current seven-dish MeerKAT precursor array (KAT-7), leading to the 64-dish MeerKAT and the giant Square Kilometer Array (SKA), which will be used for transformational radio astronomy research. Ghana, an African partner to the SKA, has been mentored by South Africa over the past six years and will soon emerge in the field of radio astronomy. The country will soon have a science-quality 32m dish converted from a redundant satellite communication antenna. Initially, it will be fitted with 5 GHz and 6.7 GHz receivers to be followed later by a 1.4 - 1.7 GHz receiver. The telescope is being designed for use as a single dish observatory and for participation in the developing African Very Long Baseline Interferometry (VLBI) Network (AVN) and the European VLBI Network. Ghana is earmarked to host a remote station during a possible SKA Phase 2. The loca...

  13. Planet-Star Plasma Interactions and Possible Radio Emission

    E-Print Network [OSTI]

    Demoulin, Pascal

    ? · Planetary radio emissions properties & energy source in Planet-Star plasma interactions · Scaling laws contraints on scaling laws & internal structure models Comparative magnetospheric physics (star-planet properties & energy source in Planet-Star plasma interactions · Scaling laws and Extrapolation to hot

  14. Faraday Accelerator with Radio-frequency Assisted Discharge (FARAD)

    E-Print Network [OSTI]

    Choueiri, Edgar

    rights reserved. #12;Abstract A new electrodeless accelerator concept, called Faraday Accelerator with Radio-frequency Assisted Discharge (FARAD), that relies on an RF-assisted discharge to produce a plasma, an applied magnetic field to guide the plasma into the acceleration region, and an induced current sheet

  15. A Resonant-Mode Model of Pulsar Radio Emission

    E-Print Network [OSTI]

    Matthew D. T. Young

    2003-10-15T23:59:59.000Z

    It is argued that the polar gap and flux tube in the pulsar magnetosphere act as a resonant cavity/waveguide system which is excited by oscillations in the primary beam current and accelerating potential. The modes will be converted, probably scattered, to produce radio beams in the frequency range of those observed.

  16. The Isotropic Radio Background and Annihilating Dark Matter

    SciTech Connect (OSTI)

    Hooper, Dan [Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Belikov, Alexander V. [Institut d'Astrophysique (France); Jeltema, Tesla E. [Univ. of California, Santa Cruz, CA (United States); Linden, Tim [Univ. of California, Santa Cruz, CA (United States); Profumo, Stefano [Univ. of California, Santa Cruz, CA (United States); Slatyer, Tracy R. [Princeton Univ., Princeton, NJ (United States)

    2012-11-01T23:59:59.000Z

    Observations by ARCADE-2 and other telescopes sensitive to low frequency radiation have revealed the presence of an isotropic radio background with a hard spectral index. The intensity of this observed background is found to exceed the flux predicted from astrophysical sources by a factor of approximately 5-6. In this article, we consider the possibility that annihilating dark matter particles provide the primary contribution to the observed isotropic radio background through the emission of synchrotron radiation from electron and positron annihilation products. For reasonable estimates of the magnetic fields present in clusters and galaxies, we find that dark matter could potentially account for the observed radio excess, but only if it annihilates mostly to electrons and/or muons, and only if it possesses a mass in the range of approximately 5-50 GeV. For such models, the annihilation cross section required to normalize the synchrotron signal to the observed excess is sigma v ~ (0.4-30) x 10^-26 cm^3/s, similar to the value predicted for a simple thermal relic (sigma v ~ 3 x 10^-26 cm^3/s). We find that in any scenario in which dark matter annihilations are responsible for the observed excess radio emission, a significant fraction of the isotropic gamma ray background observed by Fermi must result from dark matter as well.

  17. Plasma Diagnostics of the Solar Corona Using Decimetric Radio Waves

    E-Print Network [OSTI]

    process may have different forms. Are they enough to heat the solar corona? The answer seems to become electric currents, must also be con­ sidered. The heating problem of the solar corona can only be solved­thermal and most likely produced by the synchrotron process. In contrast, the quiet and slowly varying solar radio

  18. Radio Cherenkov signals from the Moon: neutrinos and cosmic rays

    E-Print Network [OSTI]

    Yu Seon Jeong; Mary Hall Reno; Ina Sarcevic

    2011-08-11T23:59:59.000Z

    Neutrino production of radio Cherenkov signals in the Moon is the object of radio telescope observations. Depending on the energy range and detection parameters, the dominant contribution to the neutrino signal may come from interactions of the neutrino on the Moon facing the telescope, rather than neutrinos that have traversed a portion of the Moon. Using the approximate analytic expression of the effective lunar aperture from a recent paper by Gayley, Mutel and Jaeger, we evaluate the background from cosmic ray interactions in the lunar regolith. We also consider the modifications to the effective lunar aperture from generic non-standard model neutrino interactions. A background to neutrino signals are radio Cherenkov signals from cosmic ray interactions. For cosmogenic neutrino fluxes, neutrino signals will be difficult to observe because of low neutrino flux at the high energy end and large cosmic ray background in the lower energy range considered here. We show that lunar radio detection of neutrino interactions is best suited to constrain or measure neutrinos from astrophysical sources and probe non-standard neutrino-nucleon interactions such as microscopic black hole production.

  19. Localized radio frequency communication using asynchronous transfer mode protocol

    DOE Patents [OSTI]

    Witzke, Edward L. (Edgewood, NM); Robertson, Perry J. (Albuquerque, NM); Pierson, Lyndon G. (Albuquerque, NM)

    2007-08-14T23:59:59.000Z

    A localized wireless communication system for communication between a plurality of circuit boards, and between electronic components on the circuit boards. Transceivers are located on each circuit board and electronic component. The transceivers communicate with one another over spread spectrum radio frequencies. An asynchronous transfer mode protocol controls communication flow with asynchronous transfer mode switches located on the circuit boards.

  20. The Radio Outburst of j Carinae S. M. White

    E-Print Network [OSTI]

    White, Stephen

    --infrared emission in the sky outside the solar system. It is thought to be one of the most massive and luminous/1993 and has made it one of the brightest stellar radio sources in the sky. The increase in flux is associated in the sky for a time. It subsequently faded, but was then discovered to be the brightest source of mid