National Library of Energy BETA

Sample records for 3g radio station

  1. Maximizing Network Lifetime Via 3G Gateway Assignment in Dual-Radio Sensor Networks

    E-Print Network [OSTI]

    Liang, Weifa

    - ments, such as temperature, humidity, wind, solar radiation, etc. [3]. Sensor nodes are typically as well as in the idling cost [5]. If all sensors are gateways, they will run out of energy within a shortMaximizing Network Lifetime Via 3G Gateway Assignment in Dual-Radio Sensor Networks Xu Xu, Weifa

  2. Antenna unit and radio base station therewith

    DOE Patents [OSTI]

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

    2007-04-10

    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. Enhancing the energy efficiency of radio base stations 

    E-Print Network [OSTI]

    Holtkamp, Hauke Andreas

    2014-06-30

    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 ...

  4. Radio Frequency Station - Beam Dynamics Interaction in Circular Accelerators

    SciTech Connect (OSTI)

    Mastoridis, Themistoklis; /Stanford U., Elect. Eng. Dept. /SLAC

    2011-03-01

    The longitudinal beam dynamics in circular accelerators is mainly defined by the interaction of the beam current with the accelerating Radio Frequency (RF) stations. For stable operation, Low Level RF (LLRF) feedback systems are employed to reduce coherent instabilities and regulate the accelerating voltage. The LLRF system design has implications for the dynamics and stability of the closed-loop RF systems as well as for the particle beam, and is very sensitive to the operating range of accelerator currents and energies. Stability of the RF loop and the beam are necessary conditions for reliable machine operation. This dissertation describes theoretical formalisms and models that determine the longitudinal beam dynamics based on the LLRF implementation, time domain simulations that capture the dynamic behavior of the RF station-beam interaction, and measurements from the Positron-Electron Project (PEP-II) and the Large Hadron Collider (LHC) that validate the models and simulations. These models and simulations are structured to capture the technical characteristics of the system (noise contributions, non-linear elements, and more). As such, they provide useful results and insight for the development and design of future LLRF feedback systems. They also provide the opportunity to study diverse longitudinal beam dynamics effects such as coupled-bunch impedance driven instabilities and single bunch longitudinal emittance growth. Coupled-bunch instabilities and RF station power were the performance limiting effects for PEP-II. The sensitivity of the instabilities to individual LLRF parameters, the effectiveness of alternative operational algorithms, and the possible tradeoffs between RF loop and beam stability were studied. New algorithms were implemented, with significant performance improvement leading to a world record current during the last PEP-II run of 3212 mA for the Low Energy Ring. Longitudinal beam emittance growth due to RF noise is a major concern for LHC. Simulations studies and measurements were conducted that clearly show the correlation between RF noise and longitudinal bunch emittance, identify the major LLRF noise contributions, and determine the RF component dominating this effect. With these results, LHC upgrades and alternative algorithms are evaluated to reduce longitudinal emittance growth during operations. The applications of this work are described with regard to future machines and analysis of new technical implementations, as well as to possible future work which would continue the directions of this dissertation.

  5. An in situ measurement of the radio-frequency attenuation in ice at Summit Station, Greenland

    E-Print Network [OSTI]

    J. Avva; J. M. Kovac; C. Miki; D. Saltzberg; A. G. Vieregg

    2014-09-30

    We report an in situ measurement of the electric field attenuation length at radio frequencies for the bulk ice at Summit Station, Greenland, made by broadcasting radio-frequency signals vertically through the ice and measuring the relative power in the return ground bounce signal. We find the depth-averaged field attenuation length to be 947 +92/-85 meters at 75 MHz. While this measurement has clear radioglaciological applications, the radio clarity of the ice also has implications for the detection of ultra-high energy (UHE) astrophysical particles via their radio emission in dielectric media such as ice. The measured attenuation length at Summit Station is comparable to previously measured radio-frequency attenuation lengths at candidate particle detector sites around the world, and strengthens the case for Summit Station as the most promising northern site for UHE neutrino detection.

  6. An in situ measurement of the radio-frequency attenuation in ice at Summit Station, Greenland

    E-Print Network [OSTI]

    J. Avva; J. M. Kovac; C. Miki; D. Saltzberg; A. G. Vieregg

    2015-12-02

    We report an in situ measurement of the electric field attenuation length at radio frequencies for the bulk ice at Summit Station, Greenland, made by broadcasting radio-frequency signals vertically through the ice and measuring the relative power in the return ground bounce signal. We find the depth-averaged field attenuation length to be 947 +92/-85 meters at 75 MHz. While this measurement has clear radioglaciological applications, the radio clarity of the ice also has implications for the detection of ultra-high energy (UHE) astrophysical particles via their radio emission in dielectric media such as ice. Assuming a reliable extrapolation to higher frequencies, the measured attenuation length at Summit Station is comparable to previously measured radio-frequency attenuation lengths at candidate particle detector sites around the world, and strengthens the case for Summit Station as a promising northern site for UHE neutrino detection.

  7. 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

  8. Design, Modeling and Testing of the Askaryan Radio Array South Pole Autonomous Renewable Power Stations

    E-Print Network [OSTI]

    Besson, D Z; Ratzlaff, K; Young, R

    2014-01-01

    We describe the design, construction and operation of the Askaryan Radio Array (ARA) Autonomous Renewable Power Stations, initially installed at the South Pole in December, 2010 with the goal of providing an independently operating 100 W power source capable of year-round operation in extreme environments. In addition to particle astrophysics applications at the South Pole, such a station can easily be, and has since been, extended to operation elsewhere, as described herein.

  9. Nanosecond-level time synchronization of autonomous radio detector stations for extensive air showers

    E-Print Network [OSTI]

    The Pierre Auger Collaboration; A. Aab; P. Abreu; M. Aglietta; E. J. Ahn; I. Al Samarai; I. F. M. Albuquerque; I. Allekotte; P. Allison; A. Almela; J. Alvarez Castillo; J. Alvarez-Muñiz; R. Alves Batista; M. Ambrosio; A. Aminaei; G. A. Anastasi; L. Anchordoqui; S. Andringa; C. Aramo; F. Arqueros; N. Arsene; H. Asorey; P. Assis; J. Aublin; G. Avila; N. Awal; A. M. Badescu; C. Baus; J. J. Beatty; K. H. Becker; J. A. Bellido; C. Berat; M. E. Bertaina; X. Bertou; P. L. Biermann; P. Billoir; S. G. Blaess; A. Blanco; M. Blanco; J. Blazek; C. Bleve; H. Blümer; M. Bohá?ová; D. Boncioli; C. Bonifazi; N. Borodai; J. Brack; I. Brancus; T. Bretz; A. Bridgeman; P. Brogueira; P. Buchholz; A. Bueno; S. Buitink; M. Buscemi; K. S. Caballero-Mora; B. Caccianiga; L. Caccianiga; M. Candusso; L. Caramete; R. Caruso; A. Castellina; G. Cataldi; L. Cazon; R. Cester; A. G. Chavez; A. Chiavassa; J. A. Chinellato; J. Chudoba; M. Cilmo; R. W. Clay; G. Cocciolo; R. Colalillo; A. Coleman; L. Collica; M. R. Coluccia; R. Conceição; F. Contreras; M. J. Cooper; A. Cordier; S. Coutu; C. E. Covault; J. Cronin; R. Dallier; B. Daniel; S. Dasso; K. Daumiller; B. R. Dawson; R. M. de Almeida; S. J. de Jong; G. De Mauro; J. R. T. de Mello Neto; I. De Mitri; J. de Oliveira; V. de Souza; L. del Peral; O. Deligny; N. Dhital; C. Di Giulio; A. Di Matteo; J. C. Diaz; M. L. Díaz Castro; F. Diogo; C. Dobrigkeit; W. Docters; J. C. D'Olivo; A. Dorofeev; Q. Dorosti Hasankiadeh; R. C. dos Anjos; M. T. Dova; J. Ebr; R. Engel; M. Erdmann; M. Erfani; C. O. Escobar; J. Eser; J. Espadanal; A. Etchegoyen; H. Falcke; K. Fang; G. Farrar; A. C. Fauth; N. Fazzini; A. P. Ferguson; B. Fick; J. M. Figueira; A. Filevich; A. Filip?i?; O. Fratu; M. M. Freire; T. Fujii; B. García; D. García-Gámez; D. Garcia-Pinto; F. Gate; H. Gemmeke; A. Gherghel-Lascu; P. L. Ghia; U. Giaccari; M. Giammarchi; M. Giller; D. G?as; C. Glaser; H. Glass; G. Golup; M. Gómez Berisso; P. F. Gómez Vitale; N. González; B. Gookin; J. Gordon; A. Gorgi; P. Gorham; P. Gouffon; N. Griffith; A. F. Grillo; T. D. Grubb; F. Guarino; G. P. Guedes; M. R. Hampel; P. Hansen; D. Harari; T. A. Harrison; S. Hartmann; J. L. Harton; A. Haungs; T. Hebbeker; D. Heck; P. Heimann; A. E. Hervé; G. C. Hill; C. Hojvat; N. Hollon; E. Holt; P. Homola; J. R. Hörandel; P. Horvath; M. Hrabovský; D. Huber; T. Huege; A. Insolia; P. G. Isar; I. Jandt; S. Jansen; C. Jarne; J. A. Johnsen; M. Josebachuili; A. Kääpä; O. Kambeitz; K. H. Kampert; P. Kasper; I. Katkov; B. Keilhauer; E. Kemp; R. M. Kieckhafer; H. O. Klages; M. Kleifges; J. Kleinfeller; R. Krause; N. Krohm; D. Kuempel; G. Kukec Mezek; N. Kunka; A. W. Kuotb Awad; D. LaHurd; A. Lang; L. Latronico; R. Lauer; M. Lauscher; P. Lautridou; S. Le Coz; D. Lebrun; P. Lebrun; M. A. Leigui de Oliveira; A. Letessier-Selvon; I. Lhenry-Yvon; K. Link; L. Lopes; R. López; A. López Casado; K. Louedec; A. Lucero; M. Malacari; M. Mallamaci; J. Maller; D. Mandat; P. Mantsch; A. G. Mariazzi; V. Marin; I. C. Mari?; G. Marsella; D. Martello; H. Martinez; O. Martínez Bravo; D. Martraire; J. J. Masías Meza; H. J. Mathes; S. Mathys; J. Matthews; J. A. J. Matthews; G. Matthiae; D. Maurizio; E. Mayotte; P. O. Mazur; C. Medina; G. Medina-Tanco; R. Meissner; V. B. B. Mello; D. Melo; A. Menshikov; S. Messina; M. I. Micheletti; L. Middendorf; I. A. Minaya; L. Miramonti; B. Mitrica; L. Molina-Bueno; S. Mollerach; F. Montanet; C. Morello; M. Mostafá; C. A. Moura; G. Müller; M. A. Muller; S. Müller; S. Navas; P. Necesal; L. Nellen; A. Nelles; J. Neuser; P. H. Nguyen; M. Niculescu-Oglinzanu; M. Niechciol; L. Niemietz; T. Niggemann; D. Nitz; D. Nosek; V. Novotny; L. Nožka; L. A. Núñez; L. Ochilo; F. Oikonomou; A. Olinto; N. Pacheco; D. Pakk Selmi-Dei; M. Palatka; J. Pallotta; P. Papenbreer; G. Parente; A. Parra; T. Paul; M. Pech; J. P?kala; R. Pelayo; I. M. Pepe; L. Perrone; E. Petermann; C. Peters; S. Petrera; Y. Petrov; J. Phuntsok; R. Piegaia; T. Pierog; P. Pieroni; M. Pimenta; V. Pirronello; M. Platino; M. Plum; A. Porcelli; C. Porowski; R. R. Prado; P. Privitera; M. Prouza; E. J. Quel; S. Querchfeld; S. Quinn; J. Rautenberg; O. Ravel; D. Ravignani; D. Reinert; B. Revenu; J. Ridky; M. Risse; P. Ristori; V. Rizi; W. Rodrigues de Carvalho; J. Rodriguez Rojo; M. D. Rodríguez-Frías; D. Rogozin; J. Rosado; M. Roth; E. Roulet; A. C. Rovero; S. J. Saffi; A. Saftoiu; H. Salazar; A. Saleh; F. Salesa Greus; G. Salina; J. D. Sanabria Gomez; F. Sánchez; P. Sanchez-Lucas; E. M. Santos; E. Santos; F. Sarazin; B. Sarkar; R. Sarmento; C. Sarmiento-Cano; R. Sato; C. Scarso; M. Schauer; V. Scherini; H. Schieler; D. Schmidt; O. Scholten; H. Schoorlemmer; P. Schovánek; F. G. Schröder; A. Schulz; J. Schulz; J. Schumacher; S. J. Sciutto; A. Segreto; M. Settimo; A. Shadkam; R. C. Shellard; G. Sigl; O. Sima; A. ?mia?kowski

    2015-12-07

    To exploit the full potential of radio measurements of cosmic-ray air showers at MHz frequencies, a detector timing synchronization within 1 ns is needed. Large distributed radio detector arrays such as the Auger Engineering Radio Array (AERA) rely on timing via the Global Positioning System (GPS) for the synchronization of individual detector station clocks. Unfortunately, GPS timing is expected to have an accuracy no better than about 5 ns. In practice, in particular in AERA, the GPS clocks exhibit drifts on the order of tens of ns. We developed a technique to correct for the GPS drifts, and an independent method used for cross-checks that indeed we reach nanosecond-scale timing accuracy by this correction. First, we operate a "beacon transmitter" which emits defined sine waves detected by AERA antennas recorded within the physics data. The relative phasing of these sine waves can be used to correct for GPS clock drifts. In addition to this, we observe radio pulses emitted by commercial airplanes, the position of which we determine in real time from Automatic Dependent Surveillance Broadcasts intercepted with a software-defined radio. From the known source location and the measured arrival times of the pulses we determine relative timing offsets between radio detector stations. We demonstrate with a combined analysis that the two methods give a consistent timing calibration with an accuracy of 2 ns or better. Consequently, the beacon method alone can be used in the future to continuously determine and correct for GPS clock drifts in each individual event measured by AERA.

  10. Assessment of Radio-Frequency Radiation Exposure Level from Selected Mobile Base Stations (MBS) in Lokoja, Kogi State, Nigeria

    E-Print Network [OSTI]

    Victor, U J Nwankwo; Dada, S S; Onugba, A A; Ushie, P

    2012-01-01

    The acquisition and use of mobile phone is tremendously increasing especially in developing countries, but not without a concern. The greater concern among the public is principally over the proximity of mobile base stations (MBS) to residential areas rather than the use of handsets. In this paper, we present an assessment of Radio-Frequency (RF) radiation exposure level measurements and analysis of radiation power density (in \\mu W/sq m) from mobile base stations relative to radial distance (in metre). The minimum average power density from individual base station in the town was about 47\\mu W/sq m while the average maximum was about 1.5mW/sq m. Our result showed that average power density of a base station decreases with increase in distance (from base station) and that radiation intensity varies from one base station to another even at the same distance away. Our result (obtained signature of power density variation) was also compared with the 'expected' signature. It was found that radiation from external...

  11. DETECTION OF FAST RADIO TRANSIENTS WITH MULTIPLE STATIONS: A CASE STUDY USING THE VERY LONG BASELINE ARRAY

    SciTech Connect (OSTI)

    Thompson, David R.; Wagstaff, Kiri L.; Majid, Walid A.; Brisken, Walter F.; Deller, Adam T.; Tingay, Steven J.; Wayth, Randall B.

    2011-07-10

    Recent investigations reveal an important new class of transient radio phenomena that occur on submillisecond timescales. Often, transient surveys' data volumes are too large to archive exhaustively. Instead, an online automatic system must excise impulsive interference and detect candidate events in real time. This work presents a case study using data from multiple geographically distributed stations to perform simultaneous interference excision and transient detection. We present several algorithms that incorporate dedispersed data from multiple sites, and report experiments with a commensal real-time transient detection system on the Very Long Baseline Array. We test the system using observations of pulsar B0329+54. The multiple-station algorithms enhanced sensitivity for detection of individual pulses. These strategies could improve detection performance for a future generation of geographically distributed arrays such as the Australian Square Kilometre Array Pathfinder and the Square Kilometre Array.

  12. Heat flows and energetic behavior of a telecommunication radio base station

    E-Print Network [OSTI]

    Petraglia, Antonio; Vetromile, Carmela; D'Onofrio, Antonio; Lubritto, Carmine

    2015-01-01

    This paper shows a study on energetic consumption of BTSs (Base Transceiver Stations) for mobile communication, related to conditioning functions. An energetic "thermal model" of a telecommunication station is proposed and studied. The results have been validated with a BTS in central Italy, showing good agreement. Findings show a substantial high internal-external temperature difference in the containing shelter, particularly during daytime and warm months, due to sources of heat (equipment, external temperature and sun radiation) and to the difficulty in spread the warmth out. The necessity to keep the operating temperatures within a given range for the correct functioning of the electronic equipment requires the use of conditioning setups, and this significantly increases the energetic demand of the whole system. The analysis of thermal flows across the shelter can help to gather further data on its temperature behavior and to devise practical measures to lower the power demand, while keeping the operating...

  13. Performance of two Askaryan Radio Array stations and first results in the search for ultra-high energy neutrinos

    E-Print Network [OSTI]

    Allison, P; Beatty, J J; Besson, D Z; Bora, C; Chen, C -C; Chen, C -H; Chen, P; Christenson, A; Connolly, A; Davies, J; Duvernois, M; Fox, B; Gaior, R; Gorham, P W; Hanson, K; Haugen, J; Hill, B; Hoffman, K D; Hong, E; Hsu, S -Y; Hu, L; Huang, J -J; Huang, M -H A; Ishihara, A; Karle, A; Kelley, J L; Kennedy, D; Kravchenko, I; Kuwabara, T; Landsman, H; Laundrie, A; Li, C -J; Liu, T C; Lu, M -Y; Macchiarulo, L; Mase, K; Meures, T; Meyhandan, R; Miki, C; Morse, R; Nam, J; Nichol, R J; Nir, G; Novikov, A; Pfendner, C; Ratzlaff, K; Relich, M; Richman, M; Ritter, L; Rotter, B; Sandstrom, P; Schellin, P; Shultz, A; Seckel, D; Shiao, Y -S; Stockham, J; Stockham, M; Touart, J; Varner, G S; Wang, M -Z; Wang, S -H; Yang, Y; Yoshida, S; Young, R

    2015-01-01

    Ultra-high energy neutrinos are interesting messenger particles since, if detected, they can transmit exclusive information about ultra-high energy processes in the Universe. These particles, with energies above $10^{16}\\mathrm{eV}$, interact very rarely. Therefore, detectors that instrument several gigatons of matter are needed to discover them. The ARA detector is currently being constructed at South Pole. It is designed to use the Askaryan effect, the emission of radio waves from neutrino-induced cascades in the South Pole ice, to detect neutrino interactions at very high energies. With antennas distributed among 37 widely-separated stations in the ice, such interactions can be observed in a volume of several hundred cubic kilometers. Currently 3 deep ARA stations are deployed in the ice of which two have been taking data since the beginning of the year 2013. In this publication, the ARA detector "as-built" and calibrations are described. Furthermore, the data reduction methods used to distinguish the rare...

  14. Measurement and Analysis of Radio-frequency Radiation Exposure Level from Different Mobile Base Transceiver Stations in Ajaokuta and Environs, Nigeria

    E-Print Network [OSTI]

    Ushie, P O; Bolaji, Ayinmode; Osahun, O D

    2013-01-01

    We present the result of a preliminary assessment of radio-frequency radiation exposure from selected mobile base stations in Ajaokuta environs. The Power density of RF radiation within a radial distance of 125m was measured. Although values fluctuated due to the influence of other factors, including wave interference from other electromagnetic sources around reference base stations, we show from analysis that radiation exposure level is below the standard limit (4.5W/sqm for 900MHz and 9W/sqm for 18000MHz) set by the International Commission on Non-ionizing Radiation Protection (ICNIRP) and other regulatory agencies.

  15. Radio and Collective Identity in the 2006 Oaxacan Uprising

    E-Print Network [OSTI]

    Rogers, Jennifer B.

    2011-01-01

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

  16. 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

  17. Design, Construction and Operation of a Low-Power, Autonomous Radio-Frequency Data-Acquisition Station for the TARA Experiment

    E-Print Network [OSTI]

    Kunwar, S; Allen, C; Belz, J; Besson, D; Byrne, M; Farhang-Boroujeny, B; Gillman, W H; Hanlon, W; Hanson, J; Myers, I; Novikov, A; Prohira, S; Ratzlaff, K; Rezazadeh, A; Sanivarapu, V; Schurig, D; Shustov, A; Smirnova, M; Takai, H; Thomson, G B; Young, R

    2015-01-01

    Employing a 40-kW radio-frequency transmitter just west of Delta, UT, and operating at 54.1 MHz, the TARA (Telescope Array RAdar) experiment seeks radar detection of extensive air showers (EAS) initiated by ultra-high energy cosmic rays (UHECR). For UHECR with energies in excess of $10^{19}$ eV, the Doppler-shifted "chirps" resulting from EAS shower core radar reflections should be observable above background (dominantly galactic) at distances of tens of km from the TARA transmitter. In order to stereoscopically reconstruct cosmic ray chirps, two remote, autonomous self-powered receiver stations have been deployed. Each remote station (RS) combines both low power consumption as well as low cost. Triggering logic, the powering and communication systems, and some specific details of hardware components are discussed.

  18. Constraints on the Ultra-High Energy Neutrino Flux from Gamma-Ray Bursts from a Prototype Station of the Askaryan Radio Array

    E-Print Network [OSTI]

    Allison, P; Bard, R; Beatty, J J; Besson, D Z; Bora, C; Chen, C -C; Chen, P; Connolly, A; Davies, J P; DuVernois, M A; Fox, B; Gorham, P W; Hanson, K; Hill, B; Hoffman, K D; Hong, E; Hu, L -C; Ishihara, A; Karle, A; Kelley, J; Kravchenko, I; Landsman, H; Laundrie, A; Li, C -J; Liu, T; Lu, M -Y; Maunu, R; Mase, K; Meures, T; Miki, C; Nam, J; Nichol, R J; Nir, G; O'Murchadha, A; Pfendner, C G; Ratzlaff, K; Richman, M; Rotter, B; Sandstrom, P; Seckel, D; Shultz, A; Song, M; Stockham, J; Stockham, M; Sullivan, M; Touart, J; Tu, H -Y; Varner, G S; Yoshida, S; Young, R; Guetta, D

    2015-01-01

    We searched for ultra-high energy (UHE) neutrinos from Gamma-Ray Bursts (GRBs) with the Askaryan Radio Array (ARA) Testbed station's 2011-2012 data set. Among 589 GRBs monitored by the Gamma Ray Coordinate Network (GCN) catalog from Jan. 2011 to Dec. 2012 over the entire sky, 57 GRBs were selected for analysis. These GRBs were chosen because they occurred during a period of low anthropogenic background and high stability of the station and fell within our geometric acceptance. We searched for UHE neutrinos from 57 GRBs and observed 0 events, which is consistent with 0.11 expected background events. With this result, we set the limits on the UHE GRB neutrino fluence and quasi-diffuse flux from $10^{16}$ to $10^{19}$~eV. This is the first limit on the UHE GRB neutrino quasi-diffuse flux at energies above $10^{16}$~eV.

  19. The Poplar Springs Radiometeor Station http://www.amsmeteors.org/radio/poplar.html[2/22/2014 5:27:46 PM

    E-Print Network [OSTI]

    Richardson Jr., James E.

    ), the free electrons in this ionized trail are capable of reflecting radio waves from transmitters below rapidly diffuses into the surrounding air, it quickly looses its ability to reflect radio waves, causing capable of reflecting radio waves for up to several minutes. Meteor radio wave reflections are also called

  20. 3G Meets the Internet: Understanding the Performance of Hierarchical Routing in 3G Networks

    E-Print Network [OSTI]

    Greenberg, Albert

    traffic uses GTP (GPRS Tunneling Protocol) tunnel and goes through GGSN. By using GGSN as a gateway data traffic goes through a small number of aggregation points using logical tunnels. In this paper, we in Figure 1, the 3G core network consists of SGSNs (Serving GPRS Support Nodes) and GGSNs (Gateway GPRS

  1. Reducing 3G energy consumption on mobile devices

    E-Print Network [OSTI]

    Deng, Shuo

    2012-01-01

    The 3G wireless interface is a significant contributor to battery drain on mobile devices. This paper describes the design, implementation, and experimental evaluation of methods to reduce the energy consumption of the 3G ...

  2. Energy Efficient Offloading of 3G Networks Nikodin Ristanovic

    E-Print Network [OSTI]

    Chaintreau, Augustin

    Energy Efficient Offloading of 3G Networks Nikodin Ristanovic EPFL, Switzerland nikodin address the amount of offloading, delay and mobile energy efficiency. We find that both solutions succeed of their smartphones. We propose two Wi-Fi based solutions for energy efficient offloading of 3G

  3. REGIONAL BLACKOUTS: PROTECTION OF BROADCAST CONTENT ON 3G NETWORKS

    E-Print Network [OSTI]

    International Association for Cryptologic Research (IACR)

    REGIONAL BLACKOUTS: PROTECTION OF BROADCAST CONTENT ON 3G NETWORKS Alexander W. Dent, Allan- gional blackouts. Broadcasters are often required to res- trict broadcasts of certain content to specific of reception is outside the blackout region. What is now required is proof that the end user is outside

  4. Captive Radio

    E-Print Network [OSTI]

    Rosenfeld, Lauren

    2012-01-01

    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

  5. Multiple Objective Fitness Functions for Cognitive Radio Adaptation

    E-Print Network [OSTI]

    Newman, Timothy Ray

    2008-04-30

    needs into commands to the underlying radio functions. In March of 2005, Vanu, Inc. introduced the first (and presently only), FCC-certified software radio product [23]. The AnyWaveTM Base Station is the first base station system that fully implements... needs into commands to the underlying radio functions. In March of 2005, Vanu, Inc. introduced the first (and presently only), FCC-certified software radio product [23]. The AnyWaveTM Base Station is the first base station system that fully implements...

  6. Challenges and Opportunities for Compound Semiconductor Devices in Next Generation Wireless Base Station Power Amplifiers

    E-Print Network [OSTI]

    Asbeck, Peter M.

    Station Power Amplifiers Lawrence Larson, Peter Asbeck, and Donald Kimball Center for Wireless Communications, Dept of ECE, UCSD, La Jolla, CA 92093 Abstract -- Power Amplifiers for cellular base stations their networks to 3G services in the coming years, it is expected that the market for base station power

  7. On the Sliding Property of SNOW 3G and Aleksandar Kircanski and Amr M. Youssef

    E-Print Network [OSTI]

    Youssef, Amr M.

    1 On the Sliding Property of SNOW 3G and SNOW 2.0 Aleksandar Kircanski and Amr M. Youssef Concordia.638, Montreal, Quebec, CANADA, H3G 2W1 email: {a kircan,youssef}@ciise.concordia.ca Abstract SNOW 3G is a stream in case its security is compromised. SNOW 2.0 is one of the stream ciphers chosen for the ISO/IEC standard

  8. Radio Transmitter 

    E-Print Network [OSTI]

    Unknown

    2011-08-17

    ? Intelligent Radio Frequency (RF) Monitoring ? 2009 Armstrong International, Inc. www.armstronginternational.com 2 ?Expect many enjoyable experiences!? David M. Armstrong Present Process Challenges ? Identifying a failure ? Procedure...

  9. EIS-0274: Disposal of S3G and D1G Prototype Reactor Plants

    Broader source: Energy.gov [DOE]

    This EIS analyzes the options and alternatives for the handling of the S3G and D1G Prototype reactor plants. Alternatives include their of prompt dismantlement, a deferred dismantlement alternative, and a no action alternative of keeping the defueled S3G and D1G Prototype reactor plants in protective storage indefinitely.

  10. Master's Thesis Performance Measurement over 3G and 3.5G Wireless Networks

    E-Print Network [OSTI]

    Moon, Sue B.

    Master's Thesis 3 3.5 Performance Measurement over 3G and 3.5G Wireless Networks ( Han, Mongnam) Department of Electrical Engineering and Computer Science Division of Computer Science and 3.5G Wireless Networks 2 #12;Performance Measurement over 3G and 3.5G Wireless Networks Major

  11. Kernel Level Energy-Efficient 3G Background Traffic Shaper for Android Smartphones

    E-Print Network [OSTI]

    Kernel Level Energy-Efficient 3G Background Traffic Shaper for Android Smartphones Ekhiotz Jon the Android platform, and measures its energy footprint. The total energy savings of our implementation range study. Index Terms--transmission energy; 3G; kernel; Android I. INTRODUCTION Mobile users have been

  12. Radio Pulsars

    E-Print Network [OSTI]

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

    2015-01-01

    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.

  13. Warkworth 12m VLBI Station: WARK12M - 2014

    E-Print Network [OSTI]

    Weston, Stuart; Woodburn, Lewis; Hart, Ben; Gulyaev, Sergei

    2015-01-01

    The Warkworth Radio Astronomical Observatory is operated by the Institute for Radio Astronomy and Space Research (IRASR), AUT University, Auckland, New Zealand. Here we review the characteristics of the VLBI station facilities and report on a number of activities and technical developments in 2014.

  14. Yerkes Summer Institute 2002 Before we begin our investigations into radio waves you should review the

    E-Print Network [OSTI]

    Collar, Juan I.

    Yerkes Summer Institute 2002 Before we begin our investigations into radio waves you should review to spend more time learning about the basic properties of waves and radio so that you will be able to get waves from your favorite radio stations. All waves have certain things in common. Let's look

  15. 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

  16. To evaluate various technologies proposed for 3G wireless communication systems, and to contribute to

    E-Print Network [OSTI]

    Objectives To evaluate various technologies proposed for 3G wireless communication systems the capacity of future cellular communication systems. To develop advanced techniques for transport of multimedia data in mobile communication systems. Collaborators/Customers ·Industry Collaborators: AT&T, Nokia

  17. A New Reconfigurable Modem Architecture for 3G Multi-Standard Wireless Communication Systems

    E-Print Network [OSTI]

    Ha, Dong S.

    A New Reconfigurable Modem Architecture for 3G Multi-Standard Wireless Communication Systems Jina, Blacksburg, VA 24061 E-mail: reedjh@vt.edu Abstract ­ The trend in communication systems is towards more. This results in a coexistence of many diverse standards. To support this diversity, communication systems

  18. The Ramsey Number R(3, K10 -e) and Computational Bounds for R(3, G)

    E-Print Network [OSTI]

    Radziszowski, Stanislaw P.

    The Ramsey Number R(3, K10 - e) and Computational Bounds for R(3, G) Jan Goedgebeur Department that the Ramsey number R(3, K10 - e) is equal to 37, which solves the smallest open case for Ramsey numbers method, we determine two other previously unknown Ramsey numbers, namely R(3, K10 - K3 - e) = 31 and R(3

  19. Replication Protein A (RPA) Hampers the Processive Action of APOBEC3G Cytosine Deaminase on

    E-Print Network [OSTI]

    Borgstahl, Gloria

    National Center for Biotechnology Information, National Library of Medicine, National Institutes of Health Abstract Background: Editing deaminases have a pivotal role in cellular physiology. A notable member of the similar antagonism of yeast RPA and human RPA with A3G in vitro, we propose that RPA plays a role

  20. Imaging the Radio Universe

    E-Print Network [OSTI]

    Hibbard, John

    not "listen" to Radio Data #12;· Radio waves are electromatic radiation, exactly like light (and x of this membrane into "sound". MediumEar Sound Radio Waves are not Sound Waves #12;You do not listen to radio waves with a radio Sound wave 5 Hz ­ 20 kHz Microphone membrane Electronically encoded sound wave (5 Hz ­ 20 k

  1. 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

  2. Energy-Ecient Initialization Protocols for Radio Networks with no Collision Detection

    E-Print Network [OSTI]

    Nakano, Koji

    to be indistinguishable. Further, since the stations are power-limited it is of importance to de- sign energy radio stations. We assume that the sta- tions are small, bulk-produced, hand-held devices running is non-trivial since the stations are assumed to be indistin- guishable. The problem is fundamental

  3. M Station, Austin 

    E-Print Network [OSTI]

    Mathon, S.

    2011-01-01

    $300 ID LL SS WE EA MR EQ AE LEED Platinum (Standard) 90 ID LL SS WE EA MR EQ AE LEED Platinum (Standard) LEED Platinum (M Station) 9081 ID LL SS WE EA MR EQ AE LEED Platinum (Standard) LEED Platinum (M Station) M Station 9081 108 ID LL... SS WE EA MR EQ AE LEED Platinum (Standard) LEED Platinum (M Station) M Station 9081 10849 $0.00/sf Planning ID LL SS WE EA MR EQ AE LEED Platinum (Standard) LEED Platinum (M Station) M Station 9081 10849 $0.00/sf Planning Location ID...

  4. Final Report: The self Reliance Foundation and Hispanic Radio Network Collaborative, September 30, 1995 - January 31, 1998

    SciTech Connect (OSTI)

    Multedo, Molly

    1998-09-30

    The Self Reliance Foundation, through its production subcontractor, Hispanic Radio Network, produced daily 1-3 minute radio capsules on science, education, and the environment. The programs were broadcast on over 100 U.S. Spanish-language radio stations from 1995-1998, reaching 2 million weekly listeners.

  5. A Taxonomy of Cyber Attacks on 3G Networks Kameswari Kotapati, Peng Liu, Yan Sun, Thomas F. LaPorta

    E-Print Network [OSTI]

    Yener, Aylin

    1 A Taxonomy of Cyber Attacks on 3G Networks Kameswari Kotapati, Peng Liu, Yan Sun, Thomas F. La Infrastructure Cyber Attack. This paper is the first to propose attack taxonomy for 3G networks. The uniqueness of this taxonomy is the inclusion of Cross Infrastructure Cyber Attacks in addition to the standard Single

  6. 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

  7. 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

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

    DOE Patents [OSTI]

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

    2010-03-16

    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.

  9. Chautauqua notebook: appropriate technology on radio

    SciTech Connect (OSTI)

    Renz, B.

    1981-01-01

    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)

  10. Improving Small Cell Capacity with Common-Carrier Full Duplex Radios

    E-Print Network [OSTI]

    Panwar, Shivendra S.

    Improving Small Cell Capacity with Common-Carrier Full Duplex Radios Sanjay Goyal, Pei Liu. A multi macro cell network with full duplex base stations is analyzed in [13], where an analytical model.com Abstract-- Recent progress in establishing the capability of radios to operate in full duplex mode

  11. Software Defined Radio Architecture

    E-Print Network [OSTI]

    Kranakis, Evangelos

    ) [14]. The USRP2 bridges the analog world of electromagnetic radio waves and digital world of computersChapter 2 Software Defined Radio Architecture A SDR is a real-time system. The inputs to the system are actions performed by the radio operator and data produced by active elements present in the SDR

  12. Introduction Big Radio Data

    E-Print Network [OSTI]

    Prodiæ, Aleksandar

    Introduction VLBI Pulsars Summary Big Radio Data Ue-Li Pen CITA, UofT, CIFAR July 3, 2014U. Pen Big Radio Data #12;Introduction VLBI Pulsars Summary Overview History VLBI Processing Future U. Pen Big signal processing U. Pen Big Radio Data #12;Introduction VLBI Pulsars Summary VLBI Current experiments

  13. Energy Efficient Radio Resource

    E-Print Network [OSTI]

    Yanikomeroglu, Halim

    Energy Efficient Radio Resource Management in a Coordinated Multi-Cell Distributed Antenna System Hacettepe University 5 September 2014 Omer HALILOGLU (Hacettepe University) Energy Efficient Radio Resource mobility , 1 Gb/s at high mobility). Omer HALILOGLU (Hacettepe University) Energy Efficient Radio Resource

  14. EA-1996: Glass Buttes Radio Station, Lake County, Oregon

    Broader source: Energy.gov [DOE]

    The Bureau of Land Management (BLM), with DOE’s Bonneville Power Administration (BPA) as a cooperating agency, is preparing an EA that will evaluate the potential environmental impacts of a proposal to construct two telecommunications facilities, one of which would provide BPA telecommunications services, on BLM land. Additional information is available at http://www.blm.gov/or/districts/prineville/plans/glassbuttes/.

  15. Cognitive Radio will revolutionize American transportation

    ScienceCinema (OSTI)

    None

    2013-12-06

    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. Radio detection of high-energy cosmic rays with the Auger Engineering Radio Array (PISA 2015)

    E-Print Network [OSTI]

    Schröder, Frank G

    2016-01-01

    The Auger Engineering Radio Array (AERA) is an enhancement of the Pierre Auger Observatory in Argentina. Covering about View the $17\\,$km$^2$, AERA is the world-largest antenna array for cosmic-ray observation. It consists of more than 150 antenna stations detecting the radio signal emitted by air showers, i.e., cascades of secondary particles caused by primary cosmic rays hitting the atmosphere. At the beginning, technical goals had been in focus: first of all, the successful demonstration that a large-scale antenna array consisting of autonomous stations is feasible. Moreover, techniques for calibration of the antennas and time calibration of the array have been developed, as well as special software for the data analysis. Meanwhile physics goals come into focus. At the Pierre Auger Observatory air showers are simultaneously detected by several detector systems, in particular water-Cherenkov detectors at the surface, underground muon detectors, and fluorescence telescopes, which enables cross-calibration of...

  17. Network Cooperation for Energy Saving in Green Radio Communications

    E-Print Network [OSTI]

    Zhuang, Weihua

    is for energy costs [1]. Each base station (BS), in cellular networks, roughly consumes upto 2.7 KWH in the following. RENEWABLE ENERGY SOURCES From an environmental perspective, the objective of green radio communications is to reduce the CO2 emissions [6]. This can be achieved by using renewable energy sources

  18. Livetime and sensitivity of the ARIANNA Hexagonal Radio Array

    E-Print Network [OSTI]

    Barwick, S W; Besson, D Z; Binder, G; Binns, W R; Boersma, D; Bose, R G; Braun, D L; Buckley, J H; Bugaev, V; Buitink, S; Dookayka, K; Dowkontt, P F; Duffin, T; Euler, S; Gerhardt, L; Gustafsson, L; Hallgren, A; Hanson, J C; Israel, M H; Kiryluk, J; Klein, S; Kleinfelder, S; Nelles, A; Niederhausen, H; Olevitch, M A; Persichelli, C; Ratzlaff, K; Rauch, B F; Reed, C; Roumi, M; Samanta, A; Simburger, G E; Stezelberger, T; Tatar, J; Uggerhoj, U; Walker, J; Young, R

    2015-01-01

    The ARIANNA collaboration completed the installation of the hexagonal radio array (HRA) in December 2014, serving as a pilot program for a planned high energy neutrino telescope located about 110 km south of McMurdo Station on the Ross Ice Shelf near the coast of Antarctica. The goal of ARIANNA is to measure both diffuse and point fluxes of astrophysical neutrinos at energies in excess of 1016 eV. Upgraded hardware has been installed during the 2014 deployment season and stations show a livetime of better than 90% between commissioning and austral sunset. Though designed to observe radio pulses from neutrino interactions originating within the ice below each detector, one station was modified to study the low-frequency environment and signals from above. We provide evidence that the HRA observed both continuous emission from the Galaxy and a transient solar burst. Preliminary work on modeling the (weak) Galactic signal confirm the absolute sensitivity of the HRA detector system.

  19. OPENENDED CONFIGURATIONS OF RADIO TELESCOPES

    E-Print Network [OSTI]

    Kreinovich, Vladik

    telescopes, devices that use the second observability window of radio waves. Why configurations of radioOPEN­ENDED CONFIGURATIONS OF RADIO TELESCOPES: A GEOMETRICAL ANALYSIS Vladik Kreinovich, Scott A. The quality of radio astronomical images drastically depends on where we place the radio telescopes. During

  20. OPENENDED CONFIGURATIONS OF RADIO TELESCOPES

    E-Print Network [OSTI]

    Kreinovich, Vladik

    telescopes, devices that use the second observability window of radio waves. #12; Why configurations of radioOPEN­ENDED CONFIGURATIONS OF RADIO TELESCOPES: TOWARDS OPTIMAL DESIGN VLADIK KREINOVICH, SCOTT A, Russia ABSTRACT The quality of radio astronomical images drastically depends on where we place the radio

  1. CRAF Handbook for Radio Astronomy

    E-Print Network [OSTI]

    Rodriguez, Luis F.

    CRAF Handbook for Radio Astronomy EUROPEAN SCIENCE FOUNDATION Committee on Radio Astronomy Handbook for Radio Astronomy, 3rd edition". #12;CRAF Handbook for Radio Astronomy Edited by Jim Cohen. This Handbook reviews the needs of the Radio Astronomy Service and the measures required for its continued

  2. Glitch Power Minimization by Gate Freezing L. Benini3 G. De Micheli A. Maciiz E. Maciiz M. Poncinoz R. Scarsiz

    E-Print Network [OSTI]

    De Micheli, Giovanni

    Glitch Power Minimization by Gate Freezing L. Benini3 G. De Micheli A. Maciiz E. Maciiz M freezing idea we present in this paper. Di erently from gate freezing, the techniques above are applied before placement and routing. We have applied the gate freezing procedure to the Iscas'85 benchmarks 2

  3. Int. J. Wireless and Mobile Computing, Vol. 2, No. 4, 2007 237 Interworking of 3G cellular networks and

    E-Print Network [OSTI]

    Zhuang, Weihua

    and wireless LANs Wei Song and Weihua Zhuang* Centre for Wireless Communications, Department of ElectricalInt. J. Wireless and Mobile Computing, Vol. 2, No. 4, 2007 237 Interworking of 3G cellular networks@bbcr.uwaterloo.ca E-mail: wzhuang@bbcr.uwaterloo.ca *Corresponding author Aladdin Saleh Wireless Technology Department

  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)

    1984-01-01

    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. 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

  7. Stellar radio astrophysics

    E-Print Network [OSTI]

    Josep M. Paredes

    2004-02-27

    Radio emission has been detected from all the stages of stellar evolution across the HR Diagram. Its presence reveals both astrophysical phenomena and stellar activity which, otherwise, would not be detectable by other means. The development of large, sensitive interferometers has allowed us to resolve the radio structure of several stellar systems, providing insights into the mass transfer process in close binary systems. I review the main characteristics of the radio emission from several kinds of stars, paying special attention to those cases where such an emission originates in relativistic jets.

  8. Chautauqua radio workshop project. Final report, July 1, 1980-October 30, 1981

    SciTech Connect (OSTI)

    Not Available

    1982-01-25

    Chautauqua is a daily call-in radio show (260 hour-long shows) broadcast over Public Radio Station WOUB fm, Athens, Ohio. This radio series covers a wide range of topics such as: energy conservation, developing small scale alternative energy sources (like windpower, solar energy, wood heat, alcohol production, earth-sheltered home construction, etc.), backyard vegetable production, and food preservation. The program's information is generated by the guests, listeners, and the show's host. An outline of the proposed steps to accomplish the proliferation of the Chautauqua radio concept throughout the US is presented. The Final Report from the Chautauqua Radio Workshop Project is presented along with the Chautauqua Notebook: appropriate technology on radio. (MCW)

  9. 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

  10. Hydrogen Filling Station

    SciTech Connect (OSTI)

    Boehm, Robert F; Sabacky, Bruce; Anderson II, Everett B; Haberman, David; Al-Hassin, Mowafak; He, Xiaoming; Morriseau, Brian

    2010-02-24

    Hydrogen is an environmentally attractive transportation fuel that has the potential to displace fossil fuels. The Freedom CAR and Freedom FUEL initiatives emphasize the importance of hydrogen as a future transportation fuel. Presently, Las Vegas has one hydrogen fueling station powered by natural gas. However, the use of traditional sources of energy to produce hydrogen does not maximize the benefit. The hydrogen fueling station developed under this grant used electrolysis units and solar energy to produce hydrogen fuel. Water and electricity are furnished to the unit and the output is hydrogen and oxygen. Three vehicles were converted to utilize the hydrogen produced at the station. The vehicles were all equipped with different types of technologies. The vehicles were used in the day-to-day operation of the Las Vegas Valley Water District and monitoring was performed on efficiency, reliability and maintenance requirements. The research and demonstration utilized for the reconfiguration of these vehicles could lead to new technologies in vehicle development that could make hydrogen-fueled vehicles more cost effective, economical, efficient and more widely used. In order to advance the development of a hydrogen future in Southern Nevada, project partners recognized a need to bring various entities involved in hydrogen development and deployment together as a means of sharing knowledge and eliminating duplication of efforts. A road-mapping session was held in Las Vegas in June 2006. The Nevada State Energy Office, representatives from DOE, DOE contractors and LANL, NETL, NREL were present. Leadership from the National hydrogen Association Board of Directors also attended. As a result of this session, a roadmap for hydrogen development was created. This roadmap has the ability to become a tool for use by other road-mapping efforts in the hydrogen community. It could also become a standard template for other states or even countries to approach planning for a hydrogen future. Project partners also conducted a workshop on hydrogen safety and permitting. This provided an opportunity for the various permitting agencies and end users to gather to share experiences and knowledge. As a result of this workshop, the permitting process for the hydrogen filling station on the Las Vegas Valley Water District’s land was done more efficiently and those who would be responsible for the operation were better educated on the safety and reliability of hydrogen production and storage. The lessons learned in permitting the filling station and conducting this workshop provided a basis for future hydrogen projects in the region. Continuing efforts to increase the working pressure of electrolysis and efficiency have been pursued. Research was also performed on improving the cost, efficiency and durability of Proton Exchange Membrane (PEM) hydrogen technology. Research elements focused upon PEM membranes, electrodes/catalysts, membrane-electrode assemblies, seals, bipolar plates, utilization of renewable power, reliability issues, scale, and advanced conversion topics. Additionally, direct solar-to-hydrogen conversion research to demonstrate stable and efficient photoelectrochemistry (PEC) hydrogen production systems based on a number of optional concepts was performed. Candidate PEC concepts included technical obstacles such as inefficient photocatalysis, inadequate photocurrent due to non-optimal material band gap energies, rapid electron-hole recombination, reduced hole mobility and diminished operational lifetimes of surface materials exposed to electrolytes. Project Objective 1: Design, build, operate hydrogen filling station Project Objective 2: Perform research and development for utilizing solar technologies on the hydrogen filling station and convert two utility vehicles for use by the station operators Project Objective 3: Increase capacity of hydrogen filling station; add additional vehicle; conduct safety workshop; develop a roadmap for hydrogen development; accelerate the development of photovoltaic components Project Objective 4:

  11. Strawberries at Troupe Station

    E-Print Network [OSTI]

    Green, Edward C.

    1904-01-01

    THE TEXAS A&M UNIVERSITY SYSTEM DANIEL C. PFANNSTIEL, DIRECTOR COLLEGE STATION, TEXAS I COVER Kenneth Hoffman, Extension demonstrator, and Hollis Duke, Atascosa County Extension agent, inspect a field of Fresno strawberries in Poteet. as Strawberries... George Ray McEachern and Bluefford G. Hancock* ery vigorous plant and can r a wide range of conditions. However, a profitable crop, definite practices are strawberry plant has three basic parts-tlle wn, and leaves. The roots are shallow and rbing...

  12. Cognitive Radio Networks as Sensor Networks

    E-Print Network [OSTI]

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

    2007-01-01

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

  13. updated_supplemental_lists_1h-2h-3g- 11-4-2011.xlsx | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LIST OFAMERICA'S FUTURE.EnergyWooden RooftopsNRC FORM 74116,test testh-2h-3g-

  14. Nguyen, Son, Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks Master of Science (Computer Science and Engineering), August 2005, 82 pp., 16 tables, 25

    E-Print Network [OSTI]

    Akl, Robert

    L. Terrell, Dean of the Robert B. Toulouse School of Graduate Studies #12;ACKNOWLEDGMENTS FirstNguyen, Son, Capacity and Throughput Optimization in Multi-cell 3G WCDMA Networks Master of Science;CAPACITY AND THROUGHPUT OPTIMIZATION IN MULTI-CELL 3G WCDMA NETWORKS Son Nguyen, B.S. Thesis Prepared

  15. eRadio : empowerment through community Web radio

    E-Print Network [OSTI]

    Gomez-Monroy, Carla, 1977-

    2004-01-01

    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, ...

  16. PV powering a weather station for severe weather

    SciTech Connect (OSTI)

    Young, W. Jr. [Florida Solar Energy Center, Cocoa, FL (United States); Schmidt, J. [Joe Schmidt, Inc., Miami, FL (United States)

    1997-12-31

    A natural disaster, such as Hurricane Andrew, destroys thousands of homes and businesses. The destruction from this storm left thousands of people without communications, potable water, and electrical power. This prompted the Florida Solar Energy Center to study the application of solar electric power for use in disasters. During this same period, volunteers at the Tropical Prediction Center at the National Hurricane Center (NHC), Miami, Florida and the Miami Office of the National Weather Service (NWS) were working to increase the quantity and quality of observations received from home weather stations. Forecasters at NHC have found surface reports from home weather stations a valuable tool in determining the size, strength and course of hurricanes. Home weather stations appear able to record the required information with an adequate level of accuracy. Amateur radio, utilizing the Automatic Packet Report System, (APRS) can be used to transmit this data to weather service offices in virtually real time. Many weather data collecting stations are at remote sites which are not readily serviced by dependable commercial power. Photovoltaic (solar electric) modules generate electricity and when connected to a battery can operate as a stand alone power system. The integration of these components provides an inexpensive standalone system. The system is easy to install, operates automatically and has good communication capabilities. This paper discusses the design criteria, operation, construction and deployment of a prototype solar powered weather station.

  17. Transit Infrastructure Finance Through Station Location Auctions

    E-Print Network [OSTI]

    Ian Carlton

    2009-01-01

    Numerous route and station options Strong real estate marketreal estate market Transit friendly constituents Numerous route and station options

  18. A prototype station for ARIANNA: a detector for cosmic neutrinos

    SciTech Connect (OSTI)

    Gerhardt, L.; Klein, S.; Stezelberger, T.; Barwick, S.; Dookayka, K.; Hanson, J.; Nichol, R.

    2010-05-27

    The Antarctic Ross Iceshelf Antenna Neutrino Array (ARIANNA) is a proposed detector for ultra-high energy astrophysical neutrinos. It will detect coherent radio Cherenkov emission from the particle showers produced by neutrinos with energies above about 1017 eV. ARIANNA will be built on the Ross Ice Shelf just off the coast of Antarctica, where it will eventually cover about 900 km2 in surface area. There, the ice-water interface below the shelf reflects radio waves, giving ARIANNA sensitivity to downward going neutrinos and improving its sensitivity to horizontally incident neutrinos. ARIANNA detector stations will each contain 4-8 antennas which search for brief pulses of 50 MHz to 1 GHz radio emission from neutrino interactions. We describe a prototype station for ARIANNA which was deployed in Moore's Bay on the Ross Ice Shelf in December 2009, discuss the design and deployment, and present some initial figures on performance. The ice shelf thickness was measured to be 572 +- 6 m at the deployment site.

  19. The radio structure of radio-quiet quasars

    E-Print Network [OSTI]

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

    2006-06-21

    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. Oriel UV Exposure Station

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

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantityBonneville Power Administration wouldMass mapSpeeding access toOctoberConsumption (Million CubicLSDOriel UV Exposure Station

  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. Continuum Radio Emission and Diagnostics

    E-Print Network [OSTI]

    White, Stephen

    Continuum Radio Emission and Diagnostics The Sun is a strong radio source (one of the first objects discusses incoher­ ent emission from thermal plasma in the non­flaring so­ lar atmosphere; other relevant material may be found in Coherent Plasma Emission and in Solar Flares: Radio Bursts. Emission mechanisms

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

    E-Print Network [OSTI]

    G. Michalek; N. Gopalswamy; H. Xie

    2007-10-24

    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.

  7. UIC/HALSTED CTA STATION

    E-Print Network [OSTI]

    Illinois at Chicago, University of

    UIC/HALSTED CTA STATION TAYLOR STREET ROOSEVELT ROAD POLK STREET MILLERSTREET CARPENTERSTREET VERNON PARK HARRISON STREET EISENHOWER EXPRESSWAY I-290 DANRYANEXPRESSWAYI-90/94 POLK STREET MORGANSTREET

  8. PacificSouthwestResearchStationPrograms Pacific Southwest Research Station

    E-Print Network [OSTI]

    PacificSouthwestResearchStationPrograms Pacific Southwest Research Station Publications List Air Pollution and Global Change Impacts on Western Forest Ecosystems Center for Urban Forest Research Chemical branch of the USDA Forest Service in the states of California and Hawaii and the U.S.-affiliat- ed

  9. Alan a. Blggs Agriculture Canada, Research Station, Vineland Station, Ontario

    E-Print Network [OSTI]

    Biggs, Alan R.

    Alan a. Blggs Agriculture Canada, Research Station, Vineland Station, Ontario IntegratedApproach to Controlling LeucostomaCankerof Peachin Ontario Peach (Prunuspersica (L.) Batsch) is the third most valuable fruit crop in Ontario, Canada, following appIes (Matus domestica Barkh.) and grapes (Vizisspp.). In 1988

  10. MicrobeWorld Radio and Communications Initiative

    SciTech Connect (OSTI)

    Barbara Hyde

    2006-11-22

    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.

  11. EFFECTS OF RADIO WAVE PROPAGATION IN URBANIZED AREAS ON UAV-GCS COMMAND AND CONTROL

    E-Print Network [OSTI]

    Jenn, David C.

    EFFECTS OF RADIO WAVE PROPAGATION IN URBANIZED AREAS ON UAV-GCS COMMAND AND CONTROL Lock Wai Lek In an urban environment, the linkage between UAVs and ground control stations are subjected to multipath multipath can result in a nearly complete loss of command signals, which can limit the UAV's operational

  12. Enabling Pervasive Mobile Applications with the FM Radio Broadcast Data System

    E-Print Network [OSTI]

    Zhong, Lin

    the cellular data service in developing markets due to its low cost. For example, 22% of low- income owners. Second, challenges for radio stations: how can they maximize their utility while maintaining customer loyalty? Third, challenges for clients: how can they maximize their reward while minimizing energy

  13. OPEN-ENDED CONFIGURATIONS OF RADIO TELESCOPES

    E-Print Network [OSTI]

    Kreinovich, Vladik

    radio telescopes, devices that use the second observability window of radio waves. Why configurationsOPEN-ENDED CONFIGURATIONS OF RADIO TELESCOPES: A GEOMETRICAL ANALYSIS Vladik Kreinovich, Scott A. The quality of radio astronomical images drastically depends on where we place the radio telescopes. During

  14. 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

  15. Energy Department Launches Alternative Fueling Station Locator...

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

    Launches Alternative Fueling Station Locator App Energy Department Launches Alternative Fueling Station Locator App November 7, 2013 - 11:16am Addthis As part of the Obama...

  16. Hydrogen Refueling Station Costs in Shanghai

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Shaojun, Liu; Ogden, Joan M; Jianxin, Ma

    2006-01-01

    04 Hydrogen Refueling Station Costs in Shanghai Jonathan X.Hydrogen Refueling Station Costs in Shanghai Jonathan X.voltage connections) Capital costs for this equipment must

  17. Hydrogen refueling station costs in Shanghai

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Shaojun, Liu; Ogden, Joan M; Jianxin, Ma

    2007-01-01

    Kingdom; 2004. [8] Amos W. Costs of storing and transportingcon- nections). Capital costs for this equipment must bein an analysis of station costs. Total station construction

  18. Elements of Radio Waves

    E-Print Network [OSTI]

    Frank G. Borg; Ismo Hakala; Jukka Määttälä

    2007-12-24

    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.

  19. 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

  20. Radio astronomy in Africa: the case of Ghana

    E-Print Network [OSTI]

    Asabere, Bernard Duah; Horellou, Cathy; Winkler, Hartmut; Jarrett, Thomas

    2015-01-01

    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...

  1. A prototype station for ARIANNA: a detector for cosmic neutrinos

    E-Print Network [OSTI]

    Gerhardt, L.

    2010-01-01

    the shelf reflects radio waves, giving ARIANNA sensitivityof 35,000 km, looking for radio waves emitted by neutrinothis interface reflects radio waves from downward-going

  2. Radio frequency coaxial feedthrough

    DOE Patents [OSTI]

    Owens, Thomas L. (Kingston, TN)

    1989-01-17

    An improved radio frequency coaxial transmission line vacuum feed-through provided based on the use of a half-wavelength annular dielectric pressure barrier disk, or multiple disks comprising an effective half wavelength structure to eliminate reflections from the barrier surfaces. Gas-tight seals are formed about the outer and inner diameter surfaces of the barrier disk using a sealing technique which generates radial forces sufficient to form seals by forcing the conductor walls against the surfaces of the barrier disks in a manner which does not deform the radii of the inner and outer conductors, thereby preventing enhancement of the electric field at the barrier faces which limits voltage and power handling capabilities of a feedthrough.

  3. Data products: what do we want? The Radio Sun

    E-Print Network [OSTI]

    Data products: what do we want? #12;The Radio Sun #12;The Radio Sun #12;Radio Emission Mechanisms) is produced by nonthermal electrons in flares. #12;The Radio Sun in Frequency #12;What do we see in a radio

  4. Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

    E-Print Network [OSTI]

    Aab, Alexander; Aglietta, Marco; Ahn, Eun-Joo; Samarai, Imen Al; Albuquerque, Ivone; Allekotte, Ingomar; Allison, Patrick; Almela, Alejandro; Castillo, Jesus Alvarez; Alvarez-Muñiz, Jaime; Batista, Rafael Alves; Ambrosio, Michelangelo; Aminaei, Amin; Anastasi, Gioacchino Alex; Anchordoqui, Luis; Andringa, Sofia; Aramo, Carla; Arqueros, Fernando; Arsene, Nicusor; Asorey, Hernán Gonzalo; Assis, Pedro; Aublin, Julien; Avila, Gualberto; Awal, Nafiun; Badescu, Alina Mihaela; Baus, Colin; Beatty, Jim; Becker, Karl Heinz; Bellido, Jose A; Berat, Corinne; Bertaina, Mario Edoardo; Bertou, Xavier; Biermann, Peter; Billoir, Pierre; Blaess, Simon G; Blanco, Alberto; Blanco, Miguel; Blazek, Jiri; Bleve, Carla; Blümer, Hans; Bohá?ová, Martina; Boncioli, Denise; Bonifazi, Carla; Borodai, Nataliia; Brack, Jeffrey; Brancus, Iliana; Bretz, Thomas; Bridgeman, Ariel; Brogueira, Pedro; Buchholz, Peter; Bueno, Antonio; Buitink, Stijn; Buscemi, Mario; Caballero-Mora, Karen S; Caccianiga, Barbara; Caccianiga, Lorenzo; Candusso, Marina; Caramete, Laurentiu; Caruso, Rossella; Castellina, Antonella; Cataldi, Gabriella; Cazon, Lorenzo; Cester, Rosanna; Chavez, Alan G; Chiavassa, Andrea; Chinellato, Jose Augusto; Chudoba, Jiri; Cilmo, Marco; Clay, Roger W; Cocciolo, Giuseppe; Colalillo, Roberta; Coleman, Alan; Collica, Laura; Coluccia, Maria Rita; Conceição, Ruben; Contreras, Fernando; Cooper, Mathew J; Cordier, Alain; Coutu, Stephane; Covault, Corbin; Cronin, James; Dallier, Richard; Daniel, Bruno; Dasso, Sergio; Daumiller, Kai; Dawson, Bruce R; de Almeida, Rogerio M; de Jong, Sijbrand J; De Mauro, Giuseppe; Neto, Joao de Mello; De Mitri, Ivan; de Oliveira, Jaime; de Souza, Vitor; del Peral, Luis; Deligny, Olivier; Dhital, Niraj; Di Giulio, Claudio; Di Matteo, Armando; Diaz, Johana Chirinos; Castro, Mary Lucia Díaz; Diogo, Francisco; Dobrigkeit, Carola; Docters, Wendy; D'Olivo, Juan Carlos; Dorofeev, Alexei; Hasankiadeh, Qader Dorosti; Anjos, Rita dos; Dova, Maria Teresa; Ebr, Jan; Engel, Ralph; Erdmann, Martin; Erfani, Mona; Escobar, Carlos O; Espadanal, Joao; Etchegoyen, Alberto; Falcke, Heino; Fang, Ke; Farrar, Glennys; Fauth, Anderson; Fazzini, Norberto; Ferguson, Andrew P; Fick, Brian; Figueira, Juan Manuel; Filevich, Alberto; Filip?i?, Andrej; Fratu, Octavian; Freire, Martín Miguel; Fujii, Toshihiro; García, Beatriz; Garcia-Gamez, Diego; Garcia-Pinto, Diego; Gate, Florian; Gemmeke, Hartmut; Gherghel-Lascu, Alexandru; Ghia, Piera Luisa; Giaccari, Ugo; Giammarchi, Marco; Giller, Maria; G?as, Dariusz; Glaser, Christian; Glass, Henry; Golup, Geraldina; Berisso, Mariano Gómez; Vitale, Primo F Gómez; González, Nicolás; Gookin, Ben; Gordon, Jacob; Gorgi, Alessio; Gorham, Peter; Gouffon, Philippe; Griffith, Nathan; Grillo, Aurelio; Grubb, Trent D; Guarino, Fausto; Guedes, Germano; Hampel, Matías Rolf; Hansen, Patricia; Harari, Diego; Harrison, Thomas A; Hartmann, Sebastian; Harton, John; Haungs, Andreas; Hebbeker, Thomas; Heck, Dieter; Heimann, Philipp; Herve, Alexander E; Hill, Gary C; Hojvat, Carlos; Hollon, Nicholas; Holt, Ewa; Homola, Piotr; Hörandel, Jörg; Horvath, Pavel; Hrabovský, Miroslav; Huber, Daniel; Huege, Tim; Insolia, Antonio; Isar, Paula Gina; Jandt, Ingolf; Jansen, Stefan; Jarne, Cecilia; Johnsen, Jeffrey A; Josebachuili, Mariela; Kääpä, Alex; Kambeitz, Olga; Kampert, Karl Heinz; Kasper, Peter; Katkov, Igor; Keilhauer, Bianca; Kemp, Ernesto; Kieckhafer, Roger; Klages, Hans; Kleifges, Matthias; Kleinfeller, Jonny; Krause, Raphael; Krohm, Nicole; Kuempel, Daniel; Mezek, Gasper Kukec; Kunka, Norbert; Awad, Alaa Metwaly Kuotb; LaHurd, Danielle; Latronico, Luca; Lauer, Robert; Lauscher, Markus; Lautridou, Pascal; Coz, Sandra Le; Lebrun, Didier; Lebrun, Paul; de Oliveira, Marcelo Augusto Leigui; Letessier-Selvon, Antoine; Lhenry-Yvon, Isabelle; Link, Katrin; Lopes, Luis; López, Rebeca; Casado, Aida López; Louedec, Karim; Lucero, Agustin; Malacari, Max; Mallamaci, Manuela; Maller, Jennifer; Mandat, Dusan; Mantsch, Paul; Mariazzi, Analisa; Marin, Vincent; Mari?, Ioana; Marsella, Giovanni; Martello, Daniele; Martinez, Humberto; Bravo, Oscar Martínez; Martraire, Diane; Meza, Jimmy Masías; Mathes, Hermann-Josef; Mathys, Sebastian; Matthews, James; Matthews, John; Matthiae, Giorgio; Maurizio, Daniela; Mayotte, Eric; Mazur, Peter; Medina, Carlos; Medina-Tanco, Gustavo; Meissner, Rebecca; Mello, Victor; Melo, Diego; Menshikov, Alexander; Messina, Stefano; Micheletti, Maria Isabel; Middendorf, Lukas; Minaya, Ignacio A; Miramonti, Lino; Mitrica, Bogdan; Molina-Bueno, Laura; Mollerach, Silvia; Montanet, François

    2015-01-01

    The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30 to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy density is determined from the radio pulses at each observer position and is interpolated using a two dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving per...

  5. Abstract--The advent of 2.5 and 3G networks mark the beginning of the mobile Internet. The investments in these

    E-Print Network [OSTI]

    Landfeldt, Bjorn

    Abstract--The advent of 2.5 and 3G networks mark the beginning of the mobile Internet. The investments in these technologies will be the largest in the history of telecommunication. However inaccessible to mobile Internet terminals that will reside in the IPv6 address space. There have been many

  6. Types of Stations and Activities at Each: 1) Short Station

    E-Print Network [OSTI]

    ) from starboard A-Frame­ Hydro Team · Fe CTD cast (1) at some locations - Wu · VPR cast (1) from stern A camera deployed from ice-Cooper/Grebmier team · If necessary, small boat work to access ice- Gradinger small boat ­ Moran At 5-6 Open Water Stations: · Van Veen Grab sampling from stern A-frame, 3/8" wire, 3

  7. Radio bursts from superconducting strings

    E-Print Network [OSTI]

    Yi-Fu Cai; Eray Sabancilar; Tanmay Vachaspati

    2012-01-30

    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.

  8. Radio Broadcasts from Superconducting Strings

    E-Print Network [OSTI]

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

    2012-05-14

    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.

  9. 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

  10. 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

  11. 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

  12. 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

  13. 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

  14. Implementing TCP Flow-Level Fairness Using 802.11e in a Multi-Radio Mesh Testbed

    E-Print Network [OSTI]

    Duffy, Ken

    , CSMA/CA, TCP, test-bed I. Introduction The problems faced by TCP in 802.11 multi-hop mesh wireless with multi-radio relay stations built us- ing commodity hardware. The proposed approach creates present whenever TCP flows are aggregated at a relay hop in a mesh network. This leads to queueing

  15. 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

  16. 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

  17. 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 ...

  18. Security Policy: Radio Network Controller

    E-Print Network [OSTI]

    Security Policy: Radio Network Controller Encryption Module Controller (RNC EMC) Cryptographic, 2007 Security Policy: RNC EMC Page 1 of 22 #12;Security Policy: RNC EMC Page 2 of 22 #12;Table...........................................................14 7. IDENTIFICATION AND AUTHENTICATION POLICY

  19. LIQUIDSLIQUIDS GISAXSGISAXSGISAXS/WAXS station

    E-Print Network [OSTI]

    Ohta, Shigemi

    LIQUIDSLIQUIDS GISAXSGISAXSGISAXS/WAXS station: * Energy range: 2.1 to 24 keV * Low divergence mode 60m 55m 50m 45m 40m 35m 30m SAXS SAXS SCD SSA VFM HFM DCMKB's Gi-SAXS/WAXS sample Liquids sample Gi

  20. NOAA PMEL Station Chemistry Data

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

    Quinn, Patricia

    Submicron and supermicron samples are analyzed by ion chromatography for Cl-, NO3-, SO4-2, Na+, NH4+, K+, Mg2+, and Ca+2. The analysis of MSA-, Br-, and oxalate has been added to some stations. Samples also are analyzed for total mass by gravimetric analysis at 55 +/- 5% RH.

  1. Mobile Alternative Fueling Station Locator

    SciTech Connect (OSTI)

    Not Available

    2009-04-01

    The Department of Energy's Alternative Fueling Station Locator is available on-the-go via cell phones, BlackBerrys, or other personal handheld devices. The mobile locator allows users to find the five closest biodiesel, electricity, E85, hydrogen, natural gas, and propane fueling sites using Google technology.

  2. NOAA PMEL Station Chemistry Data

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

    Quinn, Patricia

    2008-04-04

    Submicron and supermicron samples are analyzed by ion chromatography for Cl-, NO3-, SO4-2, Na+, NH4+, K+, Mg2+, and Ca+2. The analysis of MSA-, Br-, and oxalate has been added to some stations. Samples also are analyzed for total mass by gravimetric analysis at 55 +/- 5% RH.

  3. Signatures in a Giant Radio Galaxy of a Cosmological Shock Wave at Intersecting Filaments of Galaxies

    E-Print Network [OSTI]

    Torsten A. Ensslin; Patrick Simon; Peter L. Biermann; Ulrich Klein; Sven Kohle; Philipp P. Kronberg; Karl-Heinz Mack

    2000-12-19

    Sensitive images of low-level, Mpc-sized radio cocoons offer new opportunities to probe large scale intergalactic gas flows outside clusters of galaxies. New radio images of high surface brightness sensitivity at strategically chosen wavelengths of the giant radio galaxy NGC 315 (Mack et al. 1997,1998) reveal significant asymmetries and particularities in the morphology, radio spectrum and polarization of the ejected radio plasma. We argue that the combination of these signatures provides a sensitive probe of an environmental shock wave. Analysis of optical redshifts in NGC 315 vicinity confirms its location to be near, or at a site of large-scale flow collisions in the 100 Mpc sized Pisces-Perseus Supercluster region. NGC 315 resides at the intersection of several galaxy filaments, and its radio plasma serves there as a `weather station' (Burns 1998) probing the flow of the elusive and previously invisible IGM gas. If our interpretation is correct, this is the first indication for a shock wave in flows caused by the cosmological large scale structure formation, which is located in a filament of galaxies. The possibility that the putative shock wave is a source of gamma-rays and ultra high energy cosmic rays is briefly discussed.

  4. COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY

    E-Print Network [OSTI]

    Laughlin, Robert B.

    CALIFORNIA ENERGY COMMISSION COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY GENERATION and Anitha Rednam, Comparative Costs of California Central Station Electricity Generation Technologies................................................................................................... 1 CHAPTER 1: Summary of Technology Costs

  5. The Response of a Two-Element Radio Interferometer to Gravitational Waves

    E-Print Network [OSTI]

    Kipp Cannon

    2003-11-20

    This document presents a ray-optics analysis of the response of a two-element radio interferometer to the presence of a plane gravitational wave. A general expression for the differential phase observed between the two receiving stations as a result of an arbitrary gravitational wave is determined, as well as the specific responses to monochromatic and black hole ring-down waveforms. Finally, the possibility of gravitational wave detection via this mechanism is discussed in the context of interferometer noise.

  6. Envelope amplifier design for wireless base-station power amplifiers

    E-Print Network [OSTI]

    Hsia, Chin

    2010-01-01

    Base Station Power Amplifiers . . . . . . . . . . . .for High Efficiency Bbase Station Power Amplifiers,” in IEEEfor Wireless Base-Station Power Amplifiers A dissertation

  7. Tradeoff between spoofing and jamming a cognitive radio

    E-Print Network [OSTI]

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

    2009-01-01

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

  8. 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

  9. A Method for Broadband Full-Duplex MIMO Radio

    E-Print Network [OSTI]

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

    2012-01-01

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

  10. Rocky Mountain Research Station 20142017 Strategic Framework

    E-Print Network [OSTI]

    Rocky Mountain Research Station 2014­2017 Strategic Framework #12;Rocky Mountain Research Station 240 West Prospect Fort Collins, CO 80526 (970) 498-1100 www.fs.fed.us/rmrs High mountain lake at GLEES (Glacier Lakes Ecosystem Experiments Site) #12;1ROCKY MOUNTAIN RESEARCH STATION -- 2014­2017 STRATEg

  11. Modeling pedestrian flows in train stations: The example of Lausanne railway station

    E-Print Network [OSTI]

    Bierlaire, Michel

    Modeling pedestrian flows in train stations: The example of Lausanne railway station Flurin S, April 15 ­ 17, 2015 #12;Modeling pedestrian flows in train stations: The example of Lausanne railway Engineering EPFL ­ Ecole Polytechnique Fédérale de Lausanne Modeling pedestrian flows in train stations

  12. Limits on Fast Radio Bursts at 145 MHz with ARTEMIS, a real-time software backend

    E-Print Network [OSTI]

    Karastergiou, A; Armour, W; Williams, C; Mort, B; Dulwich, F; Salvini, S; Magro, A; Roberts, S; Serylak, M; Doo, A; Bilous, A V; Breton, R P; Falcke, H; Griessmeier, J -M; Hessels, J W T; Keane, E F; Kondratiev, V I; Kramer, M; van Leeuwen, J; Noutsos, A; Oslowski, S; Sobey, C; Stappers, B W; Weltevrede, P

    2015-01-01

    Fast Radio Bursts (FRBs), are millisecond radio signals that exhibit dispersion larger than what the Galactic electron density can account for. We have conducted a 1446 hour survey for Fast Radio Bursts (FRBs) at 145~MHz, covering a total of 4193 sq. deg on the sky. We used the UK station of the LOFAR radio telescope -- the Rawlings Array -- , accompanied for a majority of the time by the LOFAR station at Nan\\c{c}ay, observing the same fields at the same frequency. Our real-time search backend, ARTEMIS, utilizes graphics processing units to search for pulses with dispersion measures up to 320 cm$^{-3}$ pc. Previous derived FRB rates from surveys around 1.4~GHz, and favoured FRB interpretations, motivated this survey, despite all previous detections occurring at higher dispersion measures. We detected no new FRBs above a signal-to-noise threshold of 10, leading to the most stringent upper limit yet on the FRB event rate at these frequencies: 29 sky$^{-1}$ day$^{-1}$ for 5~ms-duration pulses above 62~Jy. The no...

  13. Taipei terminal rail station : casting an urban gateway

    E-Print Network [OSTI]

    Tsai, May Deanna

    1991-01-01

    Access is a key issue in the design of railway stations. The evolution of the train station typology, has resulted in many types of stations based on the development of the stations' access. Since rail travel on a larger ...

  14. Timber Mountain Precipitation Monitoring Station

    SciTech Connect (OSTI)

    Lyles, Brad; McCurdy, Greg; Chapman, Jenny; Miller, Julianne

    2012-01-01

    A precipitation monitoring station was placed on the west flank of Timber Mountain during the year 2010. It is located in an isolated highland area near the western border of the Nevada National Security Site (NNSS), south of Pahute Mesa. The cost of the equipment, permitting, and installation was provided by the Environmental Monitoring Systems Initiative (EMSI) project. Data collection, analysis, and maintenance of the station during fiscal year 2011 was funded by the U.S. Department of Energy, National Nuclear Security Administration, Nevada Site Office Environmental Restoration, Soils Activity. The station is located near the western headwaters of Forty Mile Wash on the Nevada Test and Training Range (NTTR). Overland flows from precipitation events that occur in the Timber Mountain high elevation area cross several of the contaminated Soils project CAU (Corrective Action Unit) sites located in the Forty Mile Wash watershed. Rain-on-snow events in the early winter and spring around Timber Mountain have contributed to several significant flow events in Forty Mile Wash. The data from the new precipitation gauge at Timber Mountain will provide important information for determining runoff response to precipitation events in this area of the NNSS. Timber Mountain is also a groundwater recharge area, and estimation of recharge from precipitation was important for the EMSI project in determining groundwater flowpaths and designing effective groundwater monitoring for Yucca Mountain. Recharge estimation additionally provides benefit to the Underground Test Area Sub-project analysis of groundwater flow direction and velocity from nuclear test areas on Pahute Mesa. Additionally, this site provides data that has been used during wild fire events and provided a singular monitoring location of the extreme precipitation events during December 2010 (see data section for more details). This letter report provides a summary of the site location, equipment, and data collected in fiscal year 2011.

  15. 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

  16. 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

  17. 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

  18. Pilgrim Station | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIXsourceII JumpQuarterly SmartDB-2, Blue Mountain GeothermalPilger Estates HotStation Jump

  19. Philippe Zarka Recherche de transitoires radio associs

    E-Print Network [OSTI]

    Meyer-Vernet, Nicole

    LOFAR Search of radio transient counterparts for gravitational waves with LOFAR IVème Ecole de PhysiquePhilippe Zarka LESIA Recherche de transitoires radio associés à des ondes gravitationnelles avec des Astroparticules "Ondes gravitationnelles et Multi-Messagers", OHP, 2013 #12;· RADIO COUNTERPARTS

  20. Secure Location Verification Using Radio Broadcast

    E-Print Network [OSTI]

    Nesterenko, Mikhail

    , exploits the difference between propagation speeds of radio and sound waves to estimate the position1 Secure Location Verification Using Radio Broadcast Adnan Vora and Mikhail Nesterenko Abstract of the prover. In this paper, we propose a solution that leverages the broadcast nature of the radio signal

  1. Secure Location Verification Using Radio Broadcast

    E-Print Network [OSTI]

    Nesterenko, Mikhail

    the difference between propagation speeds of radio and sound waves to estimate the position of the proverSecure Location Verification Using Radio Broadcast Adnan Vora and Mikhail Nesterenko Computer. In this paper, we propose a solution that leverages the broadcast nature of the radio signal emitted

  2. METHODS OF RADIO-FREQUENCY CURRENT DRIVE

    E-Print Network [OSTI]

    -670 Radio-frequency waves can penetrate thermonuclear plasmas, depositing momentum and energy with great. INTRODUCTION Using radio-frequency (rf) waves to drive the toroidal current in tokamak reactors is attractiveMETHODS OF RADIO-FREQUENCY CURRENT DRIVE N. J. FISCH* Princeton Plasma Physics Laboratory

  3. Radio Wave Emission from the Outer Planets

    E-Print Network [OSTI]

    Meyer-Vernet, Nicole

    Radio Wave Emission from the Outer Planets P. Zarka LESIA, Observatoire de Paris, Meudon #12;All outer planets) produce intense nonthermal radio emissions potentially interesting remote sensing tool of magnetospheric plasma(s) we can "see" magnetospheres directly, but do we understand what we see ? #12;"Radio

  4. 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

  5. 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

  6. 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

  7. 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

  8. *Correspondence to: Mark S. Fox, Department of Mechanical and Industrial Engineering, and Department of Computer Science, University of Toronto, Toronto, Ontario, Canada M5S 3G9. E-mail: msf@ie.utoronto.ca

    E-Print Network [OSTI]

    Fox, Mark S.

    , and Department of Computer Science, University of Toronto, Toronto, Ontario, Canada M5S 3G9. E-mail: msf and Manufacturing, Ontario Contract/grant sponsor: Digital Equipment of Canada CCC 1094 AND MARK S. FOX* Department of Computer Science, ºniversity of ¹oronto, ¹oronto,Ontario, Canada M5S 3G9

  9. Hybrid spread spectrum radio system

    DOE Patents [OSTI]

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

    2010-02-09

    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.

  10. Physics 343 Observational Radio Astronomy

    E-Print Network [OSTI]

    Baker, Andrew J.

    is spending this week in Cape Town, South Africa, where he is helping lead the first facetoface meeting is fair game. Previous years: "Current and Future Radio Astronomy Projects" "The Search: measuring a telecope's beam #2: calibrating a telescope's response; measuring solar variability #3

  11. 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

  12. Relic Radio Bubbles and Cluster Cooling Flows

    E-Print Network [OSTI]

    David S. De Young

    2003-05-09

    Recent suggestions that buoyant radio emitting cavities in the intracluster medium can cause significant reheating of cooling flows are re-examined when the effects of the intracluster magnetic field are included. Expansion of the cavity creates a tangential magnetic field in the ICM around the radio source, and this field can suppress instabilities that mix the ICM and the radio source. The onset of instability can be delayed for ~100 million years, and calculation of the actual reheating time shows that this may not occur until about 1Gy after creation of the cavity. These results may explain why the relic radio bubbles are still intact at such late times, and it may imply that the role of radio sources in reheating the ICM should be re-examined. In addition, the existence of relic radio cavities may also imply that the particle content of radio source lobes is primarily electrons and protons rather than electrons and positrons.

  13. Hydrogen refueling station costs in Shanghai

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Shaojun, Liu; Ogden, Joan M; Jianxin, Ma

    2007-01-01

    station and equipment costs Capital equipment costs Non-a function of capital cost and is therefore represented intechnology and therefore capital cost and maintenance cost

  14. Reference Designs for Hydrogen Fueling Stations

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

    and piping & instrumentation diagrams * Ancillary Results - Near-term FCEV rollout scenario analysis year-by-year - Near-term hydrogen station rollout analysis year-by-year...

  15. Illinois Nuclear Profile - Byron Generating Station

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

    Byron Generating Station" ,"Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date"...

  16. Illinois Nuclear Profile - Dresden Generating Station

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

    Dresden Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration...

  17. Illinois Nuclear Profile - Braidwood Generation Station

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

    Braidwood Generation Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License...

  18. Kansas Nuclear Profile - Wolf Creek Generating Station

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

    April 2012" "Next Release Date: February 2013" "Wolf Creek Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor...

  19. Illinois Nuclear Profile - Clinton Power Station

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

    Clinton Power Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date"...

  20. Washington Nuclear Profile - Columbia Generating Station

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

    Columbia Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration...

  1. Massachusetts Nuclear Profile - Pilgrim Nuclear Power Station

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

    Pilgrim Nuclear Power Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer cpacity factor (percent)","Type","Commercial operation date","License...

  2. Hydrogen Refueling Station Costs in Shanghai

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Shaojun, Liu; Ogden, J; Jianxin, Ma

    2006-01-01

    production equipment (e.g. electrolyzer, steam reformer) (iffeedstock costs differences. Electrolyzer stations yield theuses an alkaline electrolyzer powered by grid electricity to

  3. Hydrogen refueling station costs in Shanghai

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Shaojun, Liu; Ogden, Joan M; Jianxin, Ma

    2007-01-01

    production equipment (e.g. electrolyzer, steam reformer) (iffeedstock costs differences. Electrolyzer stations yield theuses an alkaline electrolyzer powered by grid electricity to

  4. Hydrogen Fueling Infrastructure Research and Station Technology...

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

    An Overview of the Hydrogen Fueling Infrastructure Research and Station Technology (H2FIRST) Project" held on November 18, 2014. Hydrogen Fueling Infrastructure Research and...

  5. Station Footprint: Separation Distances, Storage Options, and...

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

    & Publications Light Duty Fuel Cell Electric Vehicle Hydrogen Fueling Protocol H2FIRST Reference Station Design Task: Project Deliverable 2-2 On-Board Storage Systems Analysis...

  6. NREL Dedicates Advanced Hydrogen Fueling Station | Community...

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

    NREL Dedicates Advanced Hydrogen Fueling Station Ceremony Coincides With National Hydrogen and Fuel Cell Day October 8, 2015 The Energy Department's National Renewable Energy...

  7. Reference Designs for Hydrogen Fueling Stations Webinar

    Broader source: Energy.gov [DOE]

    Access the recording and download the presentation slides from the Fuel Cell Technologies Office webinar "Reference Designs for Hydrogen Fueling Stations" held on October 13, 2015.

  8. Base Station Localization in Search of Empty Spectrum Spaces in Cognitive Radio Networks

    E-Print Network [OSTI]

    Welling, Max

    Department Jilin University, China University of California, Irvine zhangyuan2u@gmail.com {lbao from both spatial and temporal perspectives. Spatially, the spectrum is over-populated by mobile

  9. EA-1996: Glass Buttes Radio Station, Lake County, Oregon | 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 Data Center Home Page on Delicious Rank EERE:FinancingPetroleum Based|Department of Energy 8:Final78: Sand

  10. Fast Radio Bursts and Radio Transients from Black Hole Batteries

    E-Print Network [OSTI]

    Chiara M. F. Mingarelli; Janna Levin; T. Joseph W. Lazio

    2015-11-09

    Most black holes (BHs) will absorb a neutron star (NS) companion fully intact, without tidal disruption, suggesting the pair will remain dark to telescopes. Even without tidal disruption, electromagnetic luminosity is generated from the battery phase of the binary when the BH interacts with the NS magnetic field. Originally the luminosity was expected in high-energy X-rays or gamma-rays, however we conjecture that some of the battery power is emitted in the radio bandwidth. While the luminosity and timescale are suggestive of fast radio bursts (FRBs; millisecond-scale radio transients) NS--BH coalescence rates are too low to make these a primary FRB source. Instead, we propose the transients form a FRB sub-population, distinguishable by a double peak with a precursor. The rapid ramp-up in luminosity manifests as a precursor to the burst which is $20\\%-80\\%$ as luminous, given 0.5~ms timing resolution. The main burst is from the peak luminosity before merger. The post-merger burst follows from the NS magnetic field migration to the BH, causing a shock. NS--BH pairs are especially desirable for ground-based gravitational wave (GW) observatories since the pair might not otherwise be detected, with electromagnetic counterparts greatly augmenting the scientific leverage beyond the GW signal. Valuably, the electromagnetic signal can break degeneracies in the parameters encoded in the GW as well as probe the NS magnetic field strength, yielding insights into open problems in NS magnetic field decay.

  11. Fast Radio Bursts and Radio Transients from Black Hole Batteries

    E-Print Network [OSTI]

    Mingarelli, Chiara M F; Lazio, T Joseph W

    2015-01-01

    Most black holes (BHs) will absorb a neutron star (NS) companion fully intact, without tidal disruption, suggesting the pair will remain dark to telescopes. Even without tidal disruption, electromagnetic luminosity is generated from the battery phase of the binary when the BH interacts with the NS magnetic field. Originally the luminosity was expected in high-energy X-rays or gamma-rays, however we conjecture that some of the battery power is emitted in the radio bandwidth. While the luminosity and timescale are suggestive of fast radio bursts (FRBs; millisecond-scale radio transients) NS--BH coalescence rates are too low to make these a primary FRB source. Instead, we propose the transients form a FRB sub-population, distinguishable by a double peak with a precursor. The rapid ramp-up in luminosity manifests as a precursor to the burst which is $20\\%-80\\%$ as luminous, given 0.5~ms timing resolution. The main burst is from the peak luminosity before merger. The post-merger burst follows from the NS magnetic ...

  12. Rocky Mountain Research Station Publishing Services Categories of Serial Station Publications

    E-Print Network [OSTI]

    Rocky Mountain Research Station ­ Publishing Services Categories of Serial Station Publications forestry public Information of a technical nature, but not necessarily an original report. Computer (Proc.) Forestry technicians/ practitioners, landowners, homeowners, general public Compilation

  13. CX-002767: Categorical Exclusion Determination

    Broader source: Energy.gov [DOE]

    Granite Mountain 3G Radio Station ProjectCX(s) Applied: B1.19Date: 06/10/2010Location(s): Stevens County, WashingtonOffice(s): Bonneville Power Administration

  14. Imaging algorithms in radio interferometry

    E-Print Network [OSTI]

    R. J. Sault; T. A. Oosterloo

    2007-01-08

    The paper reviews progress in imaging in radio interferometry for the period 1993-1996. Unlike an optical telescope, the basic measurements of a radio interferometer (correlations between antennas) are indirectly related to a sky brightness image. In a real sense, algorithms and computers are the lenses of a radio interferometer. In the last 20 years, whereas interferometer hardware advances have resulted in improvements of a factor of a few, algorithm and computer advances have resulted in orders of magnitude improvement in image quality. Developing these algorithms has been a fruitful and comparatively inexpensive method of improving the performance of existing telescopes, and has made some newer telescopes possible. In this paper, we review recent developments in the algorithms used in the imaging part of the reduction process. What constitutes an `imaging algorithm'? Whereas once there was a steady `forward' progression in the reduction process of editing, calibrating, transforming and, finally, deconvolving, this is no longer true. The introduction of techniques such as self-calibration, and algorithms that go directly from visibilities to final images, have made the dividing lines less clear. Although we briefly consider self-calibration, for the purposes of this paper calibration issues are generally excluded. Most attention will be directed to the steps which form final images from the calibrated visibilities.

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

    E-Print Network [OSTI]

    James S. Dunlop

    2001-03-15

    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. Geotechnical Engineering at the Waterways Experiment Station

    E-Print Network [OSTI]

    motions, advanced methods of site characterization, liquefaction po tentia l of fine-grained and gra vellyGEOSPEC Geotechnical Engineering at the Waterways Experiment Station The Geotechnical Laboratory at the U.S. Army Engineer Waterways Experi ment Station (WES) was founded in 1932 and currently

  17. Station GPS permanente IPG Paris DGF Uchile

    E-Print Network [OSTI]

    Vigny, Christophe

    and autonomous energy (battery and solar panel). HISTORIC Semi-permanent GPS station installed since 08­DEC- 2007.08295 - 68.92680 DESCRIPTION North Chile II region, semipermanent GPS station from IPGP / DGF network telephone nearby NONO Electric power nearby NONO equipment storage available YESYES possibility of leaving

  18. LNG to CNG refueling stations

    SciTech Connect (OSTI)

    Branson, J.D. [ECOGAS Corp., Austin, TX (United States)

    1995-12-31

    While the fleet operator is concerned about the environment, he or she is going to make the choice based primarily on economics. Which fuel provides the lowest total operating cost? The calculation of this costing must include the price-per-gallon of the fuel delivered, as well as the tangible and intangible components of fuel delivery, such as downtime for vehicles during the refueling process, idle time for drivers during refueling, emissions costings resulting from compressor oil blow-by, inclusion of non-combustible constituents in the CNG, and energy consumption during the refueling process. Also, the upfront capital requirement of similar delivery capabilities must be compared. The use of LNG as the base resource for the delivered CNG, in conjunction with the utilization of a fully temperature-compressed LNG/CNG refueling system, eliminates many of the perceived shortfalls of CNG. An LNG/CNG refueling center designed to match the capabilities of the compressor-based station will have approximately the same initial capital requirement. However, because it derives its CNG sales product from the {minus}260 F LNG base product, thus availing itself of the natural physical properties of the cryogenic product, all other economic elements of the system favor the LNG/CNG product.

  19. High speed imager test station

    DOE Patents [OSTI]

    Yates, G.J.; Albright, K.L.; Turko, B.T.

    1995-11-14

    A test station enables the performance of a solid state imager (herein called a focal plane array or FPA) to be determined at high image frame rates. A programmable waveform generator is adapted to generate clock pulses at determinable rates for clock light-induced charges from a FPA. The FPA is mounted on an imager header board for placing the imager in operable proximity to level shifters for receiving the clock pulses and outputting pulses effective to clock charge from the pixels forming the FPA. Each of the clock level shifters is driven by leading and trailing edge portions of the clock pulses to reduce power dissipation in the FPA. Analog circuits receive output charge pulses clocked from the FPA pixels. The analog circuits condition the charge pulses to cancel noise in the pulses and to determine and hold a peak value of the charge for digitizing. A high speed digitizer receives the peak signal value and outputs a digital representation of each one of the charge pulses. A video system then displays an image associated with the digital representation of the output charge pulses clocked from the FPA. In one embodiment, the FPA image is formatted to a standard video format for display on conventional video equipment. 12 figs.

  20. High speed imager test station

    DOE Patents [OSTI]

    Yates, George J. (Santa Fe, NM); Albright, Kevin L. (Los Alamos, NM); Turko, Bojan T. (Moraga, CA)

    1995-01-01

    A test station enables the performance of a solid state imager (herein called a focal plane array or FPA) to be determined at high image frame rates. A programmable waveform generator is adapted to generate clock pulses at determinable rates for clock light-induced charges from a FPA. The FPA is mounted on an imager header board for placing the imager in operable proximity to level shifters for receiving the clock pulses and outputting pulses effective to clock charge from the pixels forming the FPA. Each of the clock level shifters is driven by leading and trailing edge portions of the clock pulses to reduce power dissipation in the FPA. Analog circuits receive output charge pulses clocked from the FPA pixels. The analog circuits condition the charge pulses to cancel noise in the pulses and to determine and hold a peak value of the charge for digitizing. A high speed digitizer receives the peak signal value and outputs a digital representation of each one of the charge pulses. A video system then displays an image associated with the digital representation of the output charge pulses clocked from the FPA. In one embodiment, the FPA image is formatted to a standard video format for display on conventional video equipment.

  1. Burner balancing Salem Harbor Station

    SciTech Connect (OSTI)

    Sload, A.W.; Dube, R.J.

    1995-12-31

    The traditional method of burner balancing is first to determine the fuel distribution, then to measure the economizer outlet excess oxygen distribution and to adjust the burners accordingly. Fuel distribution is typically measured by clean and dirty air probing. Coal pipe flow can then be adjusted, if necessary, through the use of coal pipe orificing or by other means. Primary air flow must be adjusted to meet the design criteria of the burner. Once coal pipe flow is balanced to within the desired criteria, secondary air flow to individual burners can be changed by adjusting windbox dampers, burner registers, shrouds or other devices in the secondary air stream. This paper discusses problems encountered in measuring excess O{sub 2} at the economizer outlet. It is important to recognize that O{sub 2} measurements at the economizer outlet, by themselves, can be very misleading. If measurement problems are suspected or encountered, an alternate approach similar to that described should be considered. The alternate method is not only useful for burner balancing but also can be used to help in calibrating the plant excess O{sub 2} instruments and provide an on line means of cross-checking excess air measurements. Balanced burners operate closer to their design stoichiometry, providing better NO{sub x} reduction. For Salem Harbor Station, this means a significant saving in urea consumption.

  2. High-interactivity radio : using the Internet to enhance community among radio listeners

    E-Print Network [OSTI]

    Easton, Joellen

    2005-01-01

    (cont.) This thesis examines the evidence of community among listeners to three radio programs, who gather online to discuss radio programming in blogs, message boards and discussion forums provided by those programs. The ...

  3. Secure Software-Defined Radio Project

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

    Project results will include the following: * Radio platform that secures "last mile" wireless communications to remote utility sites and provides superior versatility and...

  4. Hybrid spread spectrum radio system

    DOE Patents [OSTI]

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

    2010-02-02

    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. Radio-frequency power generation

    E-Print Network [OSTI]

    Carter, Richard G

    2013-01-01

    This paper reviews the main types of radio-frequency power amplifiers which are, or may be, used for high-power hadron accelerators. It covers tetrodes, inductive output tubes, klystrons and magnetrons with power outputs greater than 10 kW continuous wave or 100 kW pulsed at frequencies from 50 MHz to 30 GHz. Factors affecting the satisfactory operation of amplifiers include cooling, matching and protection circuits are discussed. The paper concludes with a summary of the state of the art for the different technologies.

  6. Fuel Station of the Future- Innovative Approach to Fuel Cell...

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

    Station of the Future- Innovative Approach to Fuel Cell Technology Unveiled in California Fuel Station of the Future- Innovative Approach to Fuel Cell Technology Unveiled in...

  7. Trona Injection Tests: Mirant Potomac River Station, Unit 1,...

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

    Trona Injection Tests: Mirant Potomac River Station, Unit 1, November 12 to December 23, 2005, Summary Report Trona Injection Tests: Mirant Potomac River Station, Unit 1, November...

  8. The Status of Renewable Hydrogen and Energy Station Technologies...

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

    The Status of Renewable Hydrogen and Energy Station Technologies and Policy Recommendations The Status of Renewable Hydrogen and Energy Station Technologies and Policy...

  9. Puge County Gongdefang Hydropower Station Investment and Development...

    Open Energy Info (EERE)

    Puge County Gongdefang Hydropower Station Investment and Development Co Ltd Jump to: navigation, search Name: Puge County Gongdefang Hydropower Station Investment and Development...

  10. Hydrogen Fueling Station in Honolulu, Hawaii Feasibility Analysis...

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

    Fueling Station in Honolulu, Hawaii Feasibility Analysis Hydrogen Fueling Station in Honolulu, Hawaii Feasibility Analysis This feasibility report assesses the technical and...

  11. License Amendment Request for Storing Exelon Sister Nuclear Stations...

    Office of Scientific and Technical Information (OSTI)

    License Amendment Request for Storing Exelon Sister Nuclear Stations Class BC LLRW in the LaSalle Station Interim Radwaste Storage Facility - 13620 Citation Details In-Document...

  12. Alternative Fueling Station Locator App Provides Info at Your...

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

    stations that offer electricity, natural gas, biodiesel, E85, propane, or hydrogen. | Energy Department The Alternative Fueling Station Locator iPhone app helps you find...

  13. 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

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

    E-Print Network [OSTI]

    Kuenning, R.W.

    2008-01-01

    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

  15. Hydrogen Refueling Station Costs in Shanghai

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Shaojun, Liu; Ogden, J; Jianxin, Ma

    2006-01-01

    Well-to-wheels analysis of hydrogen based fuel-cell vehicleJP, et al. Distributed Hydrogen Fueling Systems Analysis,”Year 2006 UCD—ITS—RR—06—04 Hydrogen Refueling Station Costs

  16. COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY GENERATIONCann Please use the following citation for this report: Klein, Joel. 2009. Comparative Costs of California............................................................................................................................1 Changes in the Cost of Generation Model

  17. Spectrum Sensing and Reconstruction for Cognitive Radio

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    to explore and exploit the free spectrum. Spectrum analyzer is used to emulate cognitive radio to do spectrum should keep silent; otherwise, cognitive radio can access this spectrum. In this paper, spectrum analyzer- rithm of sensing spectrum and transmission schemes [6]. Pre- viously, spectrum analyzer was controlled

  18. Radio Tomographic Imaging for Ambient Assisted Living

    E-Print Network [OSTI]

    Patwari, Neal

    radio device. We describe a technique named radio tomographic imaging (RTI), which produces real of people. People's locations are inferred from the estimated RTI images. We show results from a long of the domestic environment, we introduce methods to make the RTI system self-calibrating. Experimental results

  19. (Surveying isolated diesel power stations in Guatemala)

    SciTech Connect (OSTI)

    Waddle, D.B.

    1990-02-26

    I travelled to Guatemala City, Guatemala, to lead a team of specialists to study the operating, administrative, and management efficiency of isolated diesel power plants, operated by Instituto Nacional de Electrificacion (INDE). The study is part of a global initiative managed jointly by the Agency for International Development and the World Bank. The power plants were audited, including INDE's largest isolated diesel station, and two, much smaller municipal and privately owned stations. I returned to Oak Ridge on February 22, 1990.

  20. Wintering Steer Calves at the Spur Station

    E-Print Network [OSTI]

    Jones, J. H.; Fisher, C. E.; Marion, P. T.

    1956-01-01

    at the Spur Station SUMMARY Winter maintenance experiments were conducted with 1,034 steer calves at the Spur station dur. ing the 14-year period from the fall of 1941 to the spring of 1955. Results of these comparative trials, in most instances, were... made approximately the same gain during the winter as heavy calves averaging 466 pounds. Wheat pasture provided the lowest cost of winter maintenance for calves. Sorghum fields and na- tive grass supplemented with cottonseed cake were intermediate...

  1. Solar and Infrared Radiation Station (SIRS) Handbook

    SciTech Connect (OSTI)

    Stoffel, T

    2005-07-01

    The Solar Infrared Radiation Station (SIRS) provides continuous measurements of broadband shortwave (solar) and longwave (atmospheric or infrared) irradiances for downwelling and upwelling components. The following six irradiance measurements are collected from a network of stations to help determine the total radiative flux exchange within the Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) Climate Research Facility: • Direct normal shortwave (solar beam) • Diffuse horizontal shortwave (sky) • Global horizontal shortwave (total hemispheric) • Upwelling shortwave (reflected) • Downwelling longwave (atmospheric infrared) • Upwelling longwave (surface infrared)

  2. Utilities respond to nuclear station blackout rule

    SciTech Connect (OSTI)

    Rubin, A.M.; Beasley, B.; Tenera, L.P

    1990-02-01

    The authors discuss how nuclear plants in the United States have taken actions to respond to the NRC Station Blackout Rule, 10CFR50.63. The rule requires that each light water cooled nuclear power plant licensed to operate must be able to withstand for a specified duration and recover from a station blackout. Station blackout is defined as the complete loss of a-c power to the essential and non-essential switch-gear buses in a nuclear power plant. A station blackout results from the loss of all off-site power as well as the on-site emergency a-c power system. There are two basic approaches to meeting the station blackout rule. One is to cope with a station blackout independent of a-c power. Coping, as it is called, means the ability of a plant to achieve and maintain a safe shutdown condition. The second approach is to provide an alternate a-c power source (AAC).

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

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

    coherent radio emission stimulated by shocks. Type II bursts are widely accepted to be radio emission produced at the electron plasma frequency andor twice that frequency...

  4. 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...

  5. 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...

  6. 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...

  7. Bayesian Inference for Radio Observations

    E-Print Network [OSTI]

    Lochner, Michelle; Zwart, Jonathan T L; Smirnov, Oleg; Bassett, Bruce A; Oozeer, Nadeem; Kunz, Martin

    2015-01-01

    (Abridged) New telescopes like the Square Kilometre Array (SKA) will push into a new sensitivity regime and expose systematics, such as direction-dependent effects, that could previously be ignored. Current methods for handling such systematics rely on alternating best estimates of instrumental calibration and models of the underlying sky, which can lead to inaccurate uncertainty estimates and biased results because such methods ignore any correlations between parameters. These deconvolution algorithms produce a single image that is assumed to be a true representation of the sky, when in fact it is just one realisation of an infinite ensemble of images compatible with the noise in the data. In contrast, here we report a Bayesian formalism that simultaneously infers both systematics and science. Our technique, Bayesian Inference for Radio Observations (BIRO), determines all parameters directly from the raw data, bypassing image-making entirely, by sampling from the joint posterior probability distribution. Thi...

  8. 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

    2015-01-01

    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...

  9. Optimal Base Station Density for Power Efficiency in Cellular Networks

    E-Print Network [OSTI]

    Haenggi, Martin

    Optimal Base Station Density for Power Efficiency in Cellular Networks Sanglap Sarkar, Radha, power consumption, power efficiency, optimal base station density. I. INTRODUCTION Cell size reduction by increasing the number of macro base stations or adding tiers of low powered base stations. There are two

  10. Competitive Charging Station Pricing for Plug-in Electric Vehicles

    E-Print Network [OSTI]

    Huang, Jianwei

    Competitive Charging Station Pricing for Plug-in Electric Vehicles Wei Yuan, Member, IEEE, Jianwei considers the problem of charging station pricing and station selection of plug-in electric vehicles (PEVs). Every PEV needs to select a charging station by con- sidering the charging prices, waiting times

  11. Hydrogen Fueling - Coming Soon to a Station Near You (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2009-04-01

    Fact sheet providing information useful to local permitting officials facing hydrogen fueling station proposals.

  12. Station GPS permanente IPG Paris DGF Uchile UNAP Iquique

    E-Print Network [OSTI]

    Vigny, Christophe

    Colocated with seismic station. Pilar constructed in reinforced concrete. Inox 12 cm rod (Delmont type

  13. Station blackout transients in the semiscale facility

    SciTech Connect (OSTI)

    Chapman, J.C.

    1985-12-01

    The test results of station blackout transients conducted in the Semiscale MOD-2B facility are discussed in this report. The Semiscale MOD-2B facility simulates a pressurized water reactor (PWR) power plant. The experiments were initiated from conditions typical of PWR plant operating conditions (primary pressure of 15.2 MPa (2205 psi) and cold leg fluid temperature of 550 K (530F)). Five station blackout experiments were conducted, Three tests in the Power Loss (PL) Test Series and the two Primary Boil-off (PBO) Tests. The responses of these tests were analyzed and compared. However, only one test response (S-PL-2) is presented and discussed in detail. The S-PL-2 experiment is characterized by examining the responses of the primary and secondary pressures and fluid temperatures, the pressurizer liquid level, the primary fluid distribution, and the core thermal behavior. The mechanisms driving the S-PL-2 responses, the main elements of the station blackout transient, the influences of initial and boundary conditions and other transient that may appear similar to a station blackout are also discussed. Information pertinent to station blackout nuclear safety issues is presented in the report. 13 refs., 44 figs.

  14. Gravitational Wave Emission from Galactic Radio Pulsars

    E-Print Network [OSTI]

    J. A. de Freitas Pacheco; J. E. Horvath

    1997-04-15

    We consider in this work continuous gravitational wave (GW) emission from non-axisymmetric radio pulsars. We treat in some detail the observational issues related to the known radio pulsar sample with the aim of unveiling the actual number of sources contributing to GW, which are likely to be the main contributors of GWs. It is shown that the operation of spheroidal GW detectors and full-size interferometers could detect this component of the radiation or impose useful limits on the effective oblateness of young radio pulsars.

  15. 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)

    2007-02-13

    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.

  16. High power radio frequency attenuation device

    DOE Patents [OSTI]

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

    1984-01-01

    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.

  17. LWA Station Design S. Ellingson, Virginia Tech

    E-Print Network [OSTI]

    Ellingson, Steven W.

    Mexico, USA Technical Goals: 10-88 MHz tuning range Baselines up to 400 km for resolution [8,2]'' @ [20 evolution Pulsars Solar Science & Space Weather Radio heliography of solar bursts & coronal mass ejections Solar radar Exploration of the Transient Universe New coherent sources (More GCRT J1745-3009s?) GRB

  18. Exploiting Radio Irregularity in Wireless Networks for Automated People Counting

    E-Print Network [OSTI]

    T, suffers from radio irregularity ­ a phenomenon referring to radio waves being selectively absorbedExploiting Radio Irregularity in Wireless Networks for Automated People Counting Wei-Chuan Lin. Radio irregularity is often regarded as a problem in wireless communications but, with the envisioned

  19. Historical Radio Astronomy Working Group IAU General Assembly

    E-Print Network [OSTI]

    Groppi, Christopher

    the observed radio waves and the stellar atmospheres research. The origin of the radio emission observed be present in the interstellar space to account for a free-free emission of the radio waves. In 1947 UnsöldProgram Historical Radio Astronomy Working Group IAU General Assembly Beijing, China Room 408

  20. A brief Overview of the GSM Radio Interface Thierry Turletti

    E-Print Network [OSTI]

    Turletti, Thierry

    Networking. Contents 1 Introduction 2 2 Radio Transmission Aspects 2 3 From Speech to Radio Waves 4 3A brief Overview of the GSM Radio Interface Thierry Turletti Telemedia Networks and Systems Group to the GSM­900 radio interface. It is not exhaustive and it is restricted to the TraOEc Channel

  1. 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

  2. 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

  3. Technological advancements in NGV station design

    SciTech Connect (OSTI)

    Ledbetter, G.S.; Grimmer, J.E.; Ketcham, E.T.

    1995-12-31

    Hurricane Compressors` SPRINT System (patent pending) is designed to increase the rate of flow from compressed natural gas (CNG) fuel stations and provide greater utilization of stored CNG than is available from traditional compressor stations. Using a novel method of adapting compressor operation to changes in CNG storage system pressures, this advanced technology provides an alternative mechanism for fuel delivery when demand for fuel is high. Transfer of CNG may be made at higher rates of flow than would be possible either from a pressure depleted storage system or directly from the compressor.

  4. Refueling stations for natural gas vehicles

    SciTech Connect (OSTI)

    Blazek, C.F.; Kinast, J.A.; Biederman, R.T.; Jasionowski, W.

    1991-01-01

    The unavailability of natural gas vehicle (NGV) refueling stations constitutes one of the major barriers to the wide spread utilization of natural gas in the transportation market. The purpose of this paper is to review and evaluate the current technical and economic status of compressed natural gas vehicle refueling stations and to identify the components or design features that offer the greatest potential for performance improvements and/or cost reductions. Both fast-fill- and slow-fill-type refueling systems will be discussed. 4 refs., 10 figs., 6 tabs.

  5. Pump station for radioactive waste water

    DOE Patents [OSTI]

    Whitton, John P.; Klos, Dean M.; Carrara, Danny T.; Minno, John J.

    2003-11-18

    A pump station for transferring radioactive particle containing waste water, includes: (a.) an enclosed sump having a vertically elongated right frusto conical wall surface and a bottom surface and (b.) a submersible volute centrifugal pump having a horizontally rotating impeller and a volute exterior surface. The sump interior surface, the bottom surface and the volute exterior surface are made of stainless steel having a 30 Ra or finer surface finish. A 15 Ra finish has been found to be most cost effective. The pump station is used for transferring waste water, without accumulation of radioactive fines.

  6. 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

    2007-01-26

    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.

  7. Security approaches for Radio Frequency Identification systems

    E-Print Network [OSTI]

    Foley, Joseph Timothy, 1976-

    2007-01-01

    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 ...

  8. Observations of Radio Giant Pulses with GAVRT

    E-Print Network [OSTI]

    Jones, Glenn

    2015-01-01

    Radio giant pulses provide a unique opportunity to study the pulsar radio emission mechanism in exquisite detail. Previous studies have revealed a wide range of properties and phenomena, including extraordinarily high brightness temperatures, sub-nanosecond emission features, and banded dynamic spectra. New measurements of giant pulse characteristics can help guide and test theoretical emission models. To this end, an extensive observation campaign has begun which will provide more than 500 hours on the Crab with a 34-meter antenna located in California, USA. The observations are being done as part of an educational outreach program called the Goldstone-Apple Valley Radio Telescope (GAVRT). This antenna has a novel wide bandwidth receiver which provides up to 8 GHz of instantaneous bandwidth in the range of 2.5 to 14 GHz. These observations will provide detailed information about the variability, amplitude distribution, and detailed frequency structure of radio giant pulses. In addition, a database of pulses ...

  9. Antenna design for ultra wideband radio

    E-Print Network [OSTI]

    Powell, Johnna, 1980-

    2004-01-01

    The recent allocation of the 3.1-10.6 GHz spectrum by the Federal Communications Commission (FCC) for Ultra Wideband (UWB) radio applications has presented a myriad of exciting opportunities and challenges for design in ...

  10. Polarimetric observations at low radio frequencies

    E-Print Network [OSTI]

    Farnes, Jamie S.

    2012-10-09

    . An interferometric polarisation mode has recently become available at the Giant Metrewave Radio Telescope (GMRT). A detailed analysis of the GMRT’s instrumental response is presented. The findings are used to create a polarisation pipeline, which in combination...

  11. Low Luminosity Radio Loud Active Galactic Nuclei

    E-Print Network [OSTI]

    G. Giovannini; M. Giroletti

    2007-08-30

    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.

  12. Radio signals of particle dark matter

    E-Print Network [OSTI]

    Marco Regis

    2011-12-08

    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.

  13. Integrally formed radio frequency quadrupole

    SciTech Connect (OSTI)

    Abbott, Steven R.

    1989-01-01

    An improved radio frequency quadrupole (10) is provided having an elongate housing (11) with an elongate central axis (12) and top, bottom and two side walls (13a-d) symmetrically disposed about the axis, and vanes (14a-d) formed integrally with the walls (13a-d), the vanes (14a-d) each having a cross-section at right angles to the central axis (12) which tapers inwardly toward the axis to form electrode tips (15a-d) spaced from each other by predetermined distances. Each of the four walls (13a-d), and the vanes (14a-d) integral therewith, is a separate structural element having a central lengthwise plane (16) passing through the tip of the vane, the walls (13a-d) having flat mounting surfaces (17, 18) at right angles to and parallel to the control plane (16), respectively, which are butted together to position the walls and vane tips relative to each other.

  14. Short range radio locator system

    DOE Patents [OSTI]

    McEwan, T.E.

    1996-12-31

    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. 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 figs.

  15. Short range radio locator system

    DOE Patents [OSTI]

    McEwan, Thomas E. (Livermore, CA)

    1996-01-01

    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.

  16. 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

    2015-01-01

    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...

  17. Abell 1033: birth of a radio phoenix

    E-Print Network [OSTI]

    de Gasperin, F; van Weeren, R J; Dawson, W A; Brüggen, M; Bonafede, A; Simionescu, A

    2015-01-01

    Extended steep-spectrum radio emission in a galaxy cluster is usually associated with a recent merger. However, given the complex scenario of galaxy cluster mergers, many of the discovered sources hardly fit into the strict boundaries of a precise taxonomy. This is especially true for radio phoenixes that do not have very well defined observational criteria. Radio phoenixes are aged radio galaxy lobes whose emission is reactivated by compression or other mechanisms. Here, we present the detection of a radio phoenix close to the moment of its formation. The source is located in Abell 1033, a peculiar galaxy cluster which underwent a recent merger. To support our claim, we present unpublished Westerbork Synthesis Radio Telescope and Chandra observations together with archival data from the Very Large Array and the Sloan Digital Sky Survey. We discover the presence of two sub-clusters displaced along the N-S direction. The two sub-clusters probably underwent a recent merger which is the cause of a moderately per...

  18. Magnetoresistance oscillations in multilayer systems: Triple quantum wells S. Wiedmann,1,2 N. C. Mamani,3 G. M. Gusev,3 O. E. Raichev,4 A. K. Bakarov,5 and J. C. Portal1,2,6

    E-Print Network [OSTI]

    Gusev, Guennady

    . Mamani,3 G. M. Gusev,3 O. E. Raichev,4 A. K. Bakarov,5 and J. C. Portal1,2,6 1LNCMI­CNRS, UPR 3228, BP Physics, Novosibirsk 630090, Russia 6Institut Universitaire de France, 75005 Paris, France Received 30

  19. Qualitative Aspects of the Solutions of a Mathematical Model for the Dynamic Analysis of the Reversible Chemical Reaction SO2(g)+1/2O2(g)SO3(g) in a Catalytic Reactor

    E-Print Network [OSTI]

    Angulo Wilfredo; Contreras Joyne

    2014-12-19

    We present some qualitative aspects concerning the solution to the mathematical model describing the dynamical behavior of the reversible chemical reaction SO2(g)+1/2O2(g)SO3(g) carried out in a catalytic reactor used in the process of sulfuric acid production.

  20. Qualitative Aspects of the Solutions of a Mathematical Model for the Dynamic Analysis of the Reversible Chemical Reaction SO2(g)+1/2O2(g)SO3(g) in a Catalytic Reactor

    E-Print Network [OSTI]

    Wilfredo, Angulo

    2014-01-01

    We present some qualitative aspects concerning the solution to the mathematical model describing the dynamical behavior of the reversible chemical reaction SO2(g)+1/2O2(g)SO3(g) carried out in a catalytic reactor used in the process of sulfuric acid production.

  1. The Village Base Station Kurtis Heimerl

    E-Print Network [OSTI]

    California at Berkeley, University of

    deployment due to low power requirements that enable local generation via solar or wind; · explicit support. At around 20W, its power consumption is low enough to avoid diesel genera- tors and the corresponding damaging equipment [2]. We propose operating the entire base station on solely wind or solar power, which

  2. City of College Station's Thermographic Mobile Scan 

    E-Print Network [OSTI]

    Shear, C. K.

    1986-01-01

    During the first quarter of 1986, the City of College Station conducted a thermographic mobile scan of the entire city. A thermographic mobile scan is a process by which heat loss/heat gain data is accumulated by a vehicle traveling the city...

  3. Technical Design Report, Second Target Station

    SciTech Connect (OSTI)

    Galambos, John D.; Anderson, David E.; Bechtol, D.; Bethea, Katie L.; Brown, N.; Carden, W. F.; Chae, Steven M.; Clark, A.; Counce, Deborah M.; Craft, K.; Crofford, Mark T.; Collins, Richard M.; Cousineau, Sarah M.; Curry, Douglas E.; Cutler, Roy I.; Dayton, Michael J.; Dean, Robert A.; Deibele, Craig E.; Doleans, Marc; Dye, T.; Eason, Bob H.; Eckroth, James A.; Fincrock, C.; Fritts, S.; Gallmeier, Franz X.; Gawne, Ken R.; Hartman, Steven M.; Herwig, Kenneth W.; Hess, S.; Holmes, Jeffrey A.; Horak, Charlie M.; Howell, Matthew P.; Iverson, Erik B.; Jacobs, Lorelei L.; Jones, Larry C.; Johnson, B.; Johnson, S.; Kasemir, Kay; Kim, Sang-Ho; Laughon, Gregory J.; Lu, W.; Mahoney, Kelly L.; Mammosser, John; McManamy, T.; Michilini, M.; Middendorf, Mark E.; O'Neal, Ed; Nemec, B.; Peters, Roy Cecil; Plum, Michael A.; Reagan, G.; Remec, Igor; Rennich, Mark J.; Riemer, Bernie; Saethre, Robert B.; Schubert, James Phillip; Shishlo, Andrei P.; Smith, C. Craig; Strong, William Herb; Tallant, Kathie M.; Tennant, David Alan; Thibadeau, Barbara M.; Trumble, S.; Trotter, Steven M.; Wang, Z.; Webb, Steven B.; Williams, Derrick C.; White, Karen S.; Zhao, Jinkui

    2015-01-01

    The Second Target Station (STS) is a proposed upgrade for SNS. It includes a doubling of the accelerator power and an additional instrument hall. The new instrument hall will receive a 467 kW 10 Hz beam. The parameters and preliminary design aspects of the STS are presented for the accelerator, target systems, instrument hall, instruments and civil construction aspects.

  4. COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY

    E-Print Network [OSTI]

    CALIFORNIA ENERGY COMMISSION COMPARATIVE COSTS OF CALIFORNIA CENTRAL STATION ELECTRICITY GENERATION in this paper. #12;ABSTRACT In this 2007 report of the cost of generation of electricity for California located technologies, California Energy Commission staff provides levelized costs, including the cost assumptions

  5. TEST STATION SALE OF PERFORMANCE TESTED BULLS

    E-Print Network [OSTI]

    Tennessee, University of

    in the test had to meet minimum performance requirements. Those were: CREEP NON-CREEP Adj 205 day wt. 560 520AS-B428 U T BULL TEST STATION SALE OF PERFORMANCE TESTED BULLS THURSDAY, MARCH 8, 2012 12:00 NOON IN GREENEVILLE AND KNOXVILLE LIVESTOCK CENTER http://animalscience.ag.utk.edu/ (For video) #12;UT BULL TEST

  6. Economic Analysis of Hydrogen Energy Station Concepts: Are "H 2E-Stations" a Key Link to a Hydrogen Fuel Cell Vehicle Infrastructure?

    E-Print Network [OSTI]

    Lipman, Timothy E.; Edwards, Jennifer L.; Kammen, Daniel M.

    2002-01-01

    ECONOMIC ANALYSIS OF HYDROGEN ENERGY STATION CONCEPTS: ARE 'Economic Analysis of Hydrogen Energy Station Concepts: Are “the concept of the “hydrogen energy station”(H 2 E-Station).

  7. First tsunami gravity wave detection in ionospheric radio occultation data

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

    Coïsson, Pierdavide; Lognonné, Philippe; Walwer, Damian; Rolland, Lucie M.

    2015-05-09

    After the 11 March 2011 earthquake and tsunami off the coast of Tohoku, the ionospheric signature of the displacements induced in the overlying atmosphere has been observed by ground stations in various regions of the Pacific Ocean. We analyze here the data of radio occultation satellites, detecting the tsunami-driven gravity wave for the first time using a fully space-based ionospheric observation system. One satellite of the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) recorded an occultation in the region above the tsunami 2.5 h after the earthquake. The ionosphere was sounded from top to bottom, thus providing themore »vertical structure of the gravity wave excited by the tsunami propagation, observed as oscillations of the ionospheric Total Electron Content (TEC). The observed vertical wavelength was about 50 km, with maximum amplitude exceeding 1 total electron content unit when the occultation reached 200 km height. We compared the observations with synthetic data obtained by summation of the tsunami-coupled gravity normal modes of the Earth/Ocean/atmosphere system, which models the associated motion of the ionosphere plasma. These results provide experimental constraints on the attenuation of the gravity wave with altitude due to atmosphere viscosity, improving the understanding of the propagation of tsunami-driven gravity waves in the upper atmosphere. They demonstrate that the amplitude of the tsunami can be estimated to within 20% by the recorded ionospheric data.« less

  8. Radio Galaxy Zoo: host galaxies and radio morphologies derived from visual inspection

    E-Print Network [OSTI]

    Banfield, J K; Willett, K W; Norris, R P; Rudnick, L; Shabala, S S; Simmons, B D; Snyder, C; Garon, A; Seymour, N; Middelberg, E; Andernach, H; Lintott, C J; Jacob, K; Kapinska, A D; Mao, M Y; Masters, K L; Jarvis, M J; Schawinski, K; Paget, E; Simpson, R; Klockner, H R; Bamford, S; Burchell, T; Chow, K E; Cotter, G; Fortson, L; Heywood, I; Jones, T W; Kaviraj, S; Lopez-Sanchez, A R; Maksym, W P; Polsterer, K; Borden, K; Hollow, R P; Whyte, L

    2015-01-01

    We present results from the first twelve months of operation of Radio Galaxy Zoo, which upon completion will enable visual inspection of over 170,000 radio sources to determine the host galaxy of the radio emission and the radio morphology. Radio Galaxy Zoo uses $1.4\\,$GHz radio images from both the Faint Images of the Radio Sky at Twenty Centimeters (FIRST) and the Australia Telescope Large Area Survey (ATLAS) in combination with mid-infrared images at $3.4\\,\\mu$m from the {\\it Wide-field Infrared Survey Explorer} (WISE) and at $3.6\\,\\mu$m from the {\\it Spitzer Space Telescope}. We present the early analysis of the WISE mid-infrared colours of the host galaxies. For images in which there is $>\\,75\\%$ consensus among the Radio Galaxy Zoo cross-identifications, the project participants are as effective as the science experts at identifying the host galaxies. The majority of the identified host galaxies reside in the mid-infrared colour space dominated by elliptical galaxies, quasi-stellar objects (QSOs), and l...

  9. An Assessment of the Near-Term Costs of Hydrogen Refueling Stations and Station Components

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Lipman, Timothy

    2006-01-01

    economics. Summary of Results Costs are calculated for sevenTable ES-1. Station costs are presented both individually (was selected because the costs provided by Fuel Cell Energy

  10. Fossil Radio Plasma in Cluster Merger Shock Waves

    E-Print Network [OSTI]

    Torsten A. Ensslin; Marcus Brueggen

    2001-04-06

    In several merging clusters of galaxies so-called cluster radio relics have been observed. These are extended radio sources which do not seem to be associated with any radio galaxy. Two competing physical mechanisms to accelerate the radio emitting electrons have been proposed: (i) diffusive shock acceleration and (ii) adiabatic compression of fossil radio plasma by merger shock waves. Here the second scenario is investigated. We present detailed 3-dimensional magneto-hydrodynamical simulations of the passage of a radio plasma cocoon through a shock wave. Taking into account synchrotron, inverse Compton and adiabatic energy losses and gains we evolved the relativistic electron population to produce synthetic radio maps in Stokes I-, Q-, and U-polarisation. In the synthetic radio maps the electric polarisation vectors are mostly perpendicular to the filamentary radio structures.

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

    E-Print Network [OSTI]

    Jung, Ji Hee

    2010-01-01

    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

    2012-01-01

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

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

    E-Print Network [OSTI]

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

    2006-04-21

    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.)

  14. VELO[city] : rethinking the multi-modal urban station

    E-Print Network [OSTI]

    Dickson, Amanda, 1974-

    2003-01-01

    Train travel was once integral to the urban condition. Railway stations and rural depots were designed as machines for efficiency and it was within the station that one could escape the chaos of the city to become a part ...

  15. Fact #816: February 10, 2014 Natural Gas Refueling Stations Grow...

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

    6: February 10, 2014 Natural Gas Refueling Stations Grow Over the Last Ten Years Fact 816: February 10, 2014 Natural Gas Refueling Stations Grow Over the Last Ten Years In 2003...

  16. Webinar October 13: Reference Designs for Hydrogen Fueling Stations...

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

    titled "Reference Designs for Hydrogen Fueling Stations" on Tuesday, October 13, from 12 to 1 p.m. Eastern Daylight Time (EDT). The goal of the H2FIRST Reference Station Design...

  17. H2FIRST Reference Station Design Task: Project Deliverable 2...

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

    Reference Station Design Task: Project Deliverable 2-2 H2FIRST Reference Station Design Task: Project Deliverable 2-2 This H2FIRST project report, published in April 2015, presents...

  18. Which way is up : towards accessible wayfinding in transit stations

    E-Print Network [OSTI]

    Leven, Dalia (Dalia Beth)

    2006-01-01

    Passengers' most frequent interaction with a rail transit system is at its stations, which represent the beginning, the end and sometimes the middle of transit trips. The design of these stations can greatly affect a user's ...

  19. 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

    2005-07-21

    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.

  20. Optical and Radio Variability of BL Lacertae

    E-Print Network [OSTI]

    Gaur, Haritma; Bachev, R; Strigachev, A; Semkov, E; Wiita, Paul J; Volvach, A E; Gu, Minfeng; Agarwal, A; Agudo, I; Aller, M F; Aller, H D; Kurtanidze, O M; Kurtanidze, S O; Lahteenmaki, A; Peneva, S; Nikolashvili, M G; Sigua, L A; Tornikoski, M; Volvach, L N

    2015-01-01

    We observed the prototype blazar, BL Lacertae, extensively in optical and radio bands during an active phase in the period 2010--2013 when the source showed several prominent outbursts. We searched for possible correlations and time lags between the optical and radio band flux variations using multifrequency data to learn about the mechanisms producing variability. During an active phase of BL Lacertae, we searched for possible correlations and time lags between multifrequency light curves of several optical and radio bands. We tried to estimate any possible variability timescales and inter-band lags in these bands. We performed optical observations in B, V, R and I bands from seven telescopes in Bulgaria, Georgia, Greece and India and obtained radio data at 36.8, 22.2, 14.5, 8 and 4.8 GHz frequencies from three telescopes in Ukraine, Finland and USA. Significant cross-correlations between optical and radio bands are found in our observations with a delay of cm-fluxes with respect to optical ones of ~250 days...

  1. Stormy Weather and Cluster Radio Galaxies

    E-Print Network [OSTI]

    J. O. Burns; C. Loken; K. Roettiger; E. Rizza; G. Bryan; M. L. Norman; P. Gomez; F. N. Owen

    1999-08-31

    New adaptive mesh refinement N-body + hydrodynamics numerical simulations are used to illustrate the complex and changing cluster environments in which many radio galaxies live and evolve. Groups and clusters of galaxies form at the intersections of filaments where they continue to accrete gas and dark matter to the present day. The accretion process produces shocks, turbulence, and transonic bulk flows forming a kind of stormy weather within the intracluster medium (ICM). Radio sources embedded within the stormy ICM form distorted, complex morphologies as observed in recent VLA cluster surveys. We show that the bending of wide-angle tailed radio sources can be understood as the result of recent cluster-subcluster mergers. We use new MHD simulations to illustrate how cluster radio halos can be formed by the shocks and turbulence produced during cluster mergers. Finally, we discuss new observations of distant Abell clusters that reveal a class of weak radio sources, probably starbursts, likely produced during the formation of the clusters as they accrete material from the supercluster environment.

  2. Are there Radio-quiet Solar Flares?

    E-Print Network [OSTI]

    Arnold O. Benz; Roman Brajsa; Jasmina Magdalenic

    2007-01-19

    Some 15% of solar flares having a soft X-ray flux above GOES class C5 are reported to lack coherent radio emission in the 100 - 4000 MHz range (type I - V and decimetric emissions). A detailed study of 29 such events reveals that 22 (76%) of them occurred at a radial distance of more than 800'' from the disk center, indicating that radio waves from the limb may be completely absorbed in some flares. The remaining seven events have statistically significant trends to be weak in GOES class and to have a softer non-thermal X-ray spectrum. All of the non-limb flares that were radio-quiet > 100 MHz were accompanied by metric type III emission below 100 MHz. Out of 201 hard X-ray flares, there was no flare except near the limb (R>800'') without coherent radio emission in the entire meter and decimeter range. We suggest that flares above GOES class C5 generally emit coherent radio waves when observed radially above the source.

  3. Station GPS permanente IPG Paris DGF Uchile UNAP Iquique

    E-Print Network [OSTI]

    Vigny, Christophe

    .691 DESCRIPTION Permanent GPS station North Chili I region. MONUMENTATION Inox 12 cm rod (Delmont type) scealed

  4. Station GPS permanente IPG Paris DGF Uchile UNAP Iquique

    E-Print Network [OSTI]

    Vigny, Christophe

    Colocated with seismic station. Bedrock. Inox 12 cm rod (Delmont type) scealed in bedrock. PG-A1 antena

  5. Hydrogen Energy Stations: Poly-Production of Electricity, Hydrogen, and Thermal Energy

    E-Print Network [OSTI]

    Lipman, Timothy; Brooks, Cameron

    2006-01-01

    shaving and backup power, and the station is expected toor “onsite power”), energy stations offer a potentially moreCharacteristics of Energy Station Power Technologies Low/

  6. Plug-In Electric Vehicle Handbook for Public Charging Station Hosts

    SciTech Connect (OSTI)

    2012-04-01

    This handbook answers basic questions about plug-in electric vehicles, charging stations, charging equipment, and considerations for station owners, property owners, and station hosts.

  7. Plug-In Electric Vehicle Handbook for Public Charging Station Hosts (Brochure)

    SciTech Connect (OSTI)

    Not Available

    2012-04-01

    This handbook answers basic questions about plug-in electric vehicles, charging stations, charging equipment, and considerations for station owners, property owners, and station hosts.

  8. Central Station DHC Phase 1 feasibility

    SciTech Connect (OSTI)

    Henderson, H.L.

    1992-03-01

    This project assisted a private real estate developer in technically assessing the feasibility of integrating a central DHC system into a proposed 72 acre area mixed-use Planned Development (Central Station) just south of the Chicago Central Business District (Loop). The technical assessment concluded that a district heating and cooling system for Central Station will be feasible, provided that a major anchor load can be connected to the system. The system conceived for the site employs a modular approach that adjusts production capacity to actual load growth. The design concept includes gas-fired boilers for heating, gas turbine driven chillers for base loading, electric motor driven chillers for peaking, steam turbines for peak power and back pressure operation, and chilled water storage. Energy will be supplied to the users in the form of steam or low temperature hot water for heating, and low temperature chilled water for cooling.

  9. BIOMASS COGASIFICATION AT POLK POWER STATION

    SciTech Connect (OSTI)

    John McDaniel

    2002-05-01

    Part of a closed loop biomass crop was recently harvested to produce electricity in Tampa Electric's Polk Power Station Unit No.1. No technical impediments to incorporating a small percentage of biomass into Polk Power Station's fuel mix were identified. Appropriate dedicated storage and handling equipment would be required for routine biomass use. Polk Unit No.1 is an integrated gasification combined cycle (IGCC) power plant. IGCC is a new approach to generating electricity cleanly from solid fuels such as coal, petroleum coke, The purpose of this experiment was to demonstrate the Polk Unit No.1 could process biomass as a fraction of its fuel without an adverse impact on availability and plant performance. The biomass chosen for the test was part of a crop of closed loop Eucalyptus trees.

  10. Fort Collins CSU Campus Weather Station Commemoration and Open House

    E-Print Network [OSTI]

    Collett Jr., Jeffrey L.

    Fort Collins CSU Campus Weather Station Commemoration and Open House Please join us in celebrating the fascinating history and important scientific contributions of the Campus Weather Station to Colorado State, July 28, 2014 from 3 - 6 p.m. with remarks at 3:30 p.m. At the Campus Weather Station*** Community Open

  11. Power-aware Base Station Positioning for Sensor Networks

    E-Print Network [OSTI]

    Bogdanov, Andrej

    Power-aware Base Station Positioning for Sensor Networks Andrej Bogdanov Elitza Maneva Samantha station, where the data can be processed. There are several power metrics that one can consider optimizing consider the problem of positioning data collecting base stations in a sensor network. We show

  12. Xcel Energy Comanche Station: Pueblo, Colorado (Data)

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

    Stoffel, T.; Andreas, A.

    A partnership with industry and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

  13. Xcel Energy Comanche Station: Pueblo, Colorado (Data)

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

    Stoffel, T.; Andreas, A.

    2007-06-20

    A partnership with industry and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

  14. Reykjanes Geothermal Power Station | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page onRAPID/Geothermal/Exploration/ColoradoRemsenburg-Speonk, New York: EnergyOpenReykjanes Geothermal Power Station Jump to:

  15. Alternative Fueling Station Locator | Department of Energy

    Energy Savers [EERE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on DeliciousMathematics And StatisticsProgram ManagerCorridor Designations in 11Alternative Fueling Station Locator

  16. 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

    2007-11-21

    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.

  17. Hanna Franberg-Delahaye SPIRAL 2 production station 4th HPTW 2011 Page 1 SPIRAL 2 production station

    E-Print Network [OSTI]

    McDonald, Kirk

    Hanna Franberg-Delahaye SPIRAL 2 production station ­ 4th HPTW 2011 Page 1 SPIRAL 2 production station Hanna Frånberg Delahaye Radioactive beam production GANIL-SPIRAL 2, Caen, France May 3, 2011 #12;Hanna Franberg-Delahaye SPIRAL 2 production station ­ 4th HPTW 2011 Page 2 Lay out of the presentation

  18. 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

  19. 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

  20. Mixing Water and Oil Under Static High Pressure H.K. Ploeg1, M.D. McCluskey2,3, G.J. Hanna2,3

    E-Print Network [OSTI]

    Collins, Gary S.

    Mixing Water and Oil Under Static High Pressure H.K. Ploeg1, M.D. McCluskey2,3, G.J. Hanna2,3 1The and O. Grasset, Journal of Chemical Physics 127, 124506 (2007) Citations: Water in Oil: Procedure: ·The initial experiment was to see a drop of water freeze to ice VI while surrounded by mineral oil

  1. Optimization Online - Radio Planning of Energy-Aware Cellular ...

    E-Print Network [OSTI]

    Nov 3, 2010 ... Radio Planning of Energy-Aware Cellular Networks ... Keywords: green networking, wireless, network design, coverage, network management, ...

  2. Calculating the probability of detecting radio signals from alien civilizations

    E-Print Network [OSTI]

    Horvat, Marko

    2006-01-01

    Although it might not be self-evident, it is in fact entirely possible to calculate the probability of detecting alien radio signals by understanding what types of extraterrestrial radio emissions can be expected and what properties these emissions can have. Using the Drake equation as the obvious starting point, and logically identifying and enumerating constraints of interstellar radio communications can yield the probability of detecting a genuine alien radio signal.

  3. Calculating the probability of detecting radio signals from alien civilizations

    E-Print Network [OSTI]

    Marko Horvat

    2007-07-14

    Although it might not be self-evident, it is in fact entirely possible to calculate the probability of detecting alien radio signals by understanding what types of extraterrestrial radio emissions can be expected and what properties these emissions can have. Using the Drake equation as the obvious starting point, and logically identifying and enumerating constraints of interstellar radio communications can yield the probability of detecting a genuine alien radio signal.

  4. Radio Properties of EROs in the Phoenix Deep Survey

    E-Print Network [OSTI]

    J. Afonso; A. M. Hopkins; M. Sullivan; B. Mobasher; A. Georgakakis; L. E. Cram

    2003-12-04

    Insensitive to dust obscuration, radio wavelengths are ideal to study star-forming galaxies free of dust induced biases. Using data from the Phoenix Deep Survey, we have identified a sample of star-forming extremely red objects (EROs). Stacking of the radio images of the radio-undetected star-forming EROs revealed a significant radio detection. Using the expected median redshift, we estimate an average star-formation rate of 61 M_sun/yr for these galaxies.

  5. Solar Radio Bursts and Space Weather Stephen M. White

    E-Print Network [OSTI]

    White, Stephen

    advantage of exceptionally clean radio spectra of such bursts acquired with the Green Bank Solar Radio Burst­effective disturbances probably originate: the layers where energy is released in solar flares, where energetic particlesSolar Radio Bursts and Space Weather Stephen M. White Dept. of Astronomy, University of Maryland

  6. Radio Wave Propagation in Potato Fields John Thelen

    E-Print Network [OSTI]

    Langendoen, Koen

    Radio Wave Propagation in Potato Fields John Thelen Wageningen University Email: John has an important effect on the propagation of radio waves. The influence of the growth stage from 23 m to 10 m. Another important result is that radio waves propagate better in conditions

  7. IS TITAN A RADIO SOURCE? W. S. Kurth

    E-Print Network [OSTI]

    Gurnett, Donald A.

    , 2004. Again, however, Saturn was actively emitting radio waves in a similar frequency range, henceIS TITAN A RADIO SOURCE? W. S. Kurth , B. Cecconi , D. A. Gurnett , M. L. Kaiser , P. Zarka , and A. Lecacheux Abstract Voyager 1 observations near Titan suggested that radio emissions near 60 kHz were

  8. The Symbiosis of Cognitive Radio and Wireless Mesh Networks

    E-Print Network [OSTI]

    Boutaba, Raouf

    a transmitter to encode information and generate radio waves. These electromagnetic waves occurring at lowChapter 18 The Symbiosis of Cognitive Radio and Wireless Mesh Networks Brent Ishibashi and Raouf, the dual usage of wireless communication makes them very resource dependent. Proposed cognitive radio (CR

  9. Technologies for DWDM Millimetre-Wave Fibre-Radio Networks

    E-Print Network [OSTI]

    Bakaul, Masuduzzaman

    Technologies for DWDM Millimetre- Wave Fibre-Radio Networks Masuduzzaman Bakaul BSc. Eng. (EE. The millimetre-wave (mm-wave) fibre-radio system with its inherent advantages of large bandwidth characteristics services and applications. At mm-wave frequencies, propagation effects through the air limit the radio cell

  10. SOME UNSOLVED CHALLENGES IN RADIO-FREQUENCY HEATING AND

    E-Print Network [OSTI]

    in the electronic version. I. INTRODUCTION There are many methods by which radio-frequency (rf) waves driveSOME UNSOLVED CHALLENGES IN RADIO-FREQUENCY HEATING AND CURRENT DRIVE N. J. FISCH* Princeton Plasma, 2013 doi:10.13182/FST13-682 Several unsolved challenges in radio-frequency heating and current drive

  11. FAILURE OF GPS FUNCTIONING CAUSED BY EXTREME SOLAR RADIO EVENTS

    E-Print Network [OSTI]

    solar radio emission followed the flare exceeded power solar radio bursts (SRB) in all flares known tillFAILURE OF GPS FUNCTIONING CAUSED BY EXTREME SOLAR RADIO EVENTS E. L. Afraimovich1 , V. V. Demyanov1 , D. E. Gary2 , A. B. Ishin1 , and G. Ya. Smolkov1 1) Institute of Solar-Terrestrial Physics

  12. 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* solutions do not adequately serve independent radio producers, who "have all these hard drives at home

  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. Data Analysis in the Radio Astr 257: Modern Astronomical Techniques

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Data Analysis in the Radio Emma Storm Astr 257: Modern Astronomical Techniques May 28th, 2013 Storm (Astr257) Radio Data Analysis 05/28/13 1 / 36 #12;Radio Data Analysis interferometers measure antenna to raw, uncalibrated data need to manually calibrate image processing depends on science goals Storm

  20. 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

  1. > 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-1509 Téléphone : 514 343-7511 Télécopieur : 514 343-2418 cism@cam.org www.cismfm.qc.ca Recherche

  2. DYNAMIC SPECTRUM ACCESS IN COGNITIVE RADIO NETWORKS

    E-Print Network [OSTI]

    Katz, Jonathan

    , the Federal Communications Commission (FCC) has con- trolled the radio frequency energy spectrum. They license resources. The basic idea is to let people use licensed frequencies, pro- vided they can guarantee interference perceived by the primary license holders will be minimal. With advances in software and cognitive

  3. 3D tracking via body radio reflections

    E-Print Network [OSTI]

    Kabelac, Zachary (Zachary E.)

    2014-01-01

    This thesis presents WiTrack, a system that tracks the 3D motion of a user from the radio signals reflected off her body. It works even if the person is occluded from the WiTrack device or in a different room. WiTrack does ...

  4. Angular clustering in the SUMSS radio survey

    E-Print Network [OSTI]

    Chris Blake; Tom Mauch; Elaine M. Sadler

    2003-10-05

    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.

  5. 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

  6. 2010 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency

    E-Print Network [OSTI]

    Jain, Raj

    . Louis RFID ReadersRFID Readers Sends a pulse of radio energy and listens for tags response Readers may24-1 ©2010 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency;24-3 ©2010 Raj JainCSE574sWashington University in St. Louis What is RFID?What is RFID? Radio Frequency

  7. Opacity in compact extragalactic radio sources and its effect on radio-optical reference frame alignment

    E-Print Network [OSTI]

    Y. Y. Kovalev; A. P. Lobanov; A. B. Pushkarev; J. A. Zensus

    2007-10-22

    Accurate alignment of the radio and optical celestial reference frames requires detailed understanding of physical factors that may cause offsets between the positions of the same object measured in different spectral bands. Opacity in compact extragalactic jets (due to synchrotron self-absorption and external free-free absorption) is one of the key physical phenomena producing such an offset, and this effect is well-known in radio astronomy ("core shift"). We have measured the core shifts in a sample of 29 bright compact extragalactic radio sources observed using very long baseline interferometry (VLBI) at 2.3 and 8.6 GHz. We report the results of these measurements and estimate that the average shift between radio and optical positions of distant quasars would be of the order of 0.1-0.2 mas. This shift exceeds positional accuracy of GAIA and SIM. We suggest two possible approaches to carefully investigate and correct for this effect in order to align accurately the radio and optical positions. Both approaches involve determining a Primary Reference Sample of objects to be used for tying the radio and optical reference frames together.

  8. Polk power station syngas cooling system

    SciTech Connect (OSTI)

    Jenkins, S.D.

    1995-01-01

    Tampa Electric Company (TEC) is in the site development and construction phase of the new Polk Power Station Unit No. 1. This will be the first unit at a new site and will use Integrated Gasification Combined Cycle (IGCC) Technology. The unit will utilize Texaco`s oxygen-blown, entrained-flow coal gasification, along with combined cycle power generation, to produce nominal 260MW. Integral to the gasification process is the syngas cooling system. The design, integration, fabrication, transportation, and erection of this equipment have provided and continue to provide major challenges for this project.

  9. Repowering of the Midland Nuclear Station 

    E-Print Network [OSTI]

    Gatlin, C. E. Jr.; Vellender, G. C.; Mooney, J. A.

    1988-01-01

    , Michigan The conversion of the Midland Nuclear Station to a combined cycle power facility is the first of its kind. The eXisting nuclear steam turbine, combined with new, natural-gas-fired gas turbines, will create the largest cogeneration facility... in the midst of a repa..'erin;J that will convert it to a natural gas-fired carbined cycle cogeneration plant. 'Ihe nuclear project started in 1967 as a two unit plant utilizin;J pressurized water reactors to supply 1,357 MW of electric generatin...

  10. Farinello Geothermal Power Station | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTIONRobertsdale, AlabamaETEC GmbHFarinello Geothermal Power Station Jump to: navigation, search

  11. Nesjavellir Geothermal Power Station | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QAsource History ViewMayo, Maryland:NPI Ventures Ltd JumpNesjavellir Geothermal Power Station Jump to: navigation,

  12. Boyd Station LLC | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX E LISTStar Energy LLC JumpBiossence JumpJersey Logo: BostonStation LLC Jump to:

  13. Alternative Fuels Data Center: Biodiesel Fueling Stations

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center Home Page on Digg FindPortsas a Vehicle FuelFueling Stations to

  14. Alternative Fuels Data Center: Ethanol Fueling Stations

    Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative Fuels Data Center Home Page on Digg FindPortsas aEthanol Benefits andFueling Stations

  15. 2006 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency

    E-Print Network [OSTI]

    Jain, Raj

    18-1 ©2006 Raj JainCSE574sWashington University in St. Louis Radio FrequencyRadio Frequency;18-3 ©2006 Raj JainCSE574sWashington University in St. Louis What is RFID?What is RFID? ! Radio Frequency #. 96-bit block of read- only storage (ROM). " Read-write memory. " Tags may have embedded sensors (tire

  16. 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

    that number counts of radio sources contain important information about the distribution of radio sources by Jackson & Wall (1999), who use the source counts at several frequencies and redshift information of the 3C of radio-loud AGN I. A. G. SnellenP and P. N. Best Institute for Astronomy, Royal Observatory, Blackford

  17. 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.

    of the radio-frequency background levels as they use the most sensitive radio-wave receivers in the world to study the sky at radio wavelengths. Radio waves can give us information about astronomical phenomena astronomy telescopes are the most sensitive radio-wave receivers in the world. For example, a mobile phone

  18. Emergency Alert System Radio Quick Guide The Emergency Alert System (EAS) radio is one component of Texas A&M University's

    E-Print Network [OSTI]

    to KAMU 90.9 FM. Power: Green light that shows the radio has power. Ready-Reset Switch: Toggle switch a test. Signal Indicator: Green light that shows radio signal reception. The EAS radio should be tuned the radio to AM or FM. Set to FM. Power Input: Plug for the AC adapter, which provides power to the radio

  19. 50,000-Watt AM Stations IA | MB | MI | MN | NE | ND | ON | SD | WI | Station News | Owners | TV Captures | Links

    E-Print Network [OSTI]

    Allen, Gale

    that broadcast with a power of 50,000 Watts day and night. Some of these stations are what was once known50,000-Watt AM Stations IA | MB | MI | MN | NE | ND | ON | SD | WI | Station News | Owners | TV Captures | Links 50,000-Watt AM stations This list includes AM stations in the United States and Canada

  20. Recovery sequences for a station blackout accident at the Grand Gulf Nuclear Station

    SciTech Connect (OSTI)

    Carbajo, J.J. [Martin Marietta Energy Systems, Oak Ridge, TN (United States)

    1995-12-31

    Recovery sequences for a low-pressure, short term, station blackout severe accident at the Grand Gulf power plant have been investigated using the computer code MELCOR, version 1.8.3 PN. This paper investigates the effect of reflood timing and mass flow rate on accident recovery.

  1. Arcsecond positions for milliarcsecond VLBI nuclei of extragalactic radio soures. Part 1. 546 sources

    SciTech Connect (OSTI)

    Morabito, D.D.; Preston, R.A.; Slade, M.A.; Jauncey, D.L.

    1981-12-01

    Very long Baseline Interferometry measurements at 2290 MHz on baselines of approximately 10 to the 4th power km between Deep Space Network stations were used to identify sources that are suitable for precision astrometric applications. The use of relatively crude time delay measurements along with fringe frequency measurements to determine the positions of the milliarcsecond nuclei in 546 extragalactic sources with accuracies of generally approximately 1' is described. The calculated positions of the sources and the corresponding uncertainties are presented and the positions are referenced to the equinox of 1950.0 and elliptical aberration terms are included so as to agree with past astronomical convention. The source positions and position uncertainties for sources which were multiply observed were estimated from a weighted average. The reliability of the determined positions was demonstrated by testing the repeatability of multiple observations on the same source and by position comparisons with more accurate radio catalogs.

  2. Radio Astronomy Data Model for Single-Dish Multiple-Feed Telescopes, and Robledo Archive Architecture

    E-Print Network [OSTI]

    Santander-Vela, J D; Gómez, J F; Verdes-Montenegro, L; Leon, S; Gutíerrez, R; Rodrigo, C; Morata, O; Solano, E; Suárez, O

    2008-01-01

    All the effort that the astrophysical community has put into the development of the Virtual Observatory (VO) has surpassed the non-return point: the VO is a reality today, and an initiative that will self-sustain, and to which all archival projects must adhere. We have started the design of the scientific archive for the DSS-63 70-m antenna at NASA's DSN station in Robledo de Chavela (Madrid). Here we show how we can use all VO proposed data models to build a VO-compliant single-dish, multiple-feed, radio astronomical archive data model (RADAMS) suitable for the archival needs of the antenna. We also propose an exhaustive list of Universal Content Descriptors (UCDs) and FITS keywords for all relevant metadata. We will further refine this data model with the experience that we will gain from that implementation.

  3. Radio Astronomy Data Model for Single-Dish Multiple-Feed Telescopes, and Robledo Archive Architecture

    E-Print Network [OSTI]

    J. D. Santander-Vela; E. Garcia; J. F. Gomez; L. Verdes-Montenegro; S. Leon; R. Gutierrez; C. Rodrigo; O. Morata; E. Solano; O. Suarez

    2008-10-02

    All the effort that the astrophysical community has put into the development of the Virtual Observatory (VO) has surpassed the non-return point: the VO is a reality today, and an initiative that will self-sustain, and to which all archival projects must adhere. We have started the design of the scientific archive for the DSS-63 70-m antenna at NASA's DSN station in Robledo de Chavela (Madrid). Here we show how we can use all VO proposed data models to build a VO-compliant single-dish, multiple-feed, radio astronomical archive data model (RADAMS) suitable for the archival needs of the antenna. We also propose an exhaustive list of Universal Content Descriptors (UCDs) and FITS keywords for all relevant metadata. We will further refine this data model with the experience that we will gain from that implementation.

  4. Radio Frequency Noise Effects on the CERN Large Hadron Collider Beam Diffusion

    SciTech Connect (OSTI)

    Mastoridis, T.; Baudrenghien, P.; Butterworth, A.; Molendijk, J.; Rivetta, C.; Fox, J.D.; /SLAC

    2012-04-30

    Radio frequency (rf) accelerating system noise can have a detrimental impact on the Large Hadron Collider (LHC) performance through longitudinal motion and longitudinal emittance growth. A theoretical formalism has been developed to relate the beam and rf station dynamics with the bunch length growth. Measurements were conducted at LHC to determine the performance limiting rf components and validate the formalism through studies of the beam diffusion dependence on rf noise. As a result, a noise threshold was established for acceptable performance which provides the foundation for beam diffusion estimates for higher energies and intensities. Measurements were also conducted to determine the low level rf noise spectrum and its major contributions, as well as to validate models and simulations of this system.

  5. 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

    2006-03-24

    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)

  6. Tracking the CME-driven shock wave on 2012 March 5 and radio triangulation of associated radio emission

    SciTech Connect (OSTI)

    Magdaleni?, J.; Marqué, C.; Mierla, M.; Zhukov, A. N.; Rodriguez, L.; Krupar, V.; Maksimovi?, M.; Cecconi, B.

    2014-08-20

    We present a multiwavelength study of the 2012 March 5 solar eruptive event, with an emphasis on the radio triangulation of the associated radio bursts. The main points of the study are reconstruction of the propagation of shock waves driven by coronal mass ejections (CMEs) using radio observations and finding the relative positions of the CME, the CME-driven shock wave, and its radio signatures. For the first time, radio triangulation is applied to different types of radio bursts in the same event and performed in a detailed way using goniopolarimetric observations from STEREO/Waves and WIND/Waves spacecraft. The event on 2012 March 5 was associated with a X1.1 flare from the NOAA AR 1429 situated near the northeast limb, accompanied by a full halo CME and a radio event comprising long-lasting interplanetary type II radio bursts. The results of the three-dimensional reconstruction of the CME (using SOHO/LASCO, STEREO COR, and HI observations), and modeling with the ENLIL cone model suggest that the CME-driven shock wave arrived at 1 AU at about 12:00 UT on March 7 (as observed by SOHO/CELIAS). The results of radio triangulation show that the source of the type II radio burst was situated on the southern flank of the CME. We suggest that the interaction of the shock wave and a nearby coronal streamer resulted in the interplanetary type II radio emission.

  7. Pulsar radiation belts and transient radio emission

    E-Print Network [OSTI]

    Q. Luo; D. B. Melrose

    2007-04-22

    It is proposed that radiation belts similar to the ones in the planetary magnetosphere can exist for a pulsar with a relatively long period and a strong magnetic field. In the belts located in the closed field line region near the light cylinder relativistic pairs are trapped and maintained at a density substantially higher than the local Goldreich-Julian corotation density. The trapped plasma can be supplied and replenished by either direct injection of relativistic pairs from acceleration of externally-supplied particles in a dormant outer gap or in situ ionization of the accreted neutral material in the trapping region. The radiation belts can be disrupted by waves that are excited in the region as the result of plasma instabilities or emitted from the surface due to starquakes or stellar oscillations. The disruption can cause an intermittent particle precipitation toward the star producing radio bursts. It is suggested that such bursts may be seen as rotating radio transients (RRATs).

  8. CALLISTO - A new concept for solar radio

    E-Print Network [OSTI]

    Arnold O. Benz; Christian Monstein; HAnsueli Meyer

    2004-10-19

    A new radio spectrometer, CALLISTO, is presented. It is a dual-channel frequency-agile receiver based on commercially available consumer electronics. Its major characteristic is the low price for hardware and software, and the short assembly time, both two or more orders of magnitude below existing spectrometers. The instrument is sensitive at the physical limit and extremely stable. The total bandwidth is 825 MHz, and the width of individual channels is 300 kHz. A total of 1000 measurements can be made per second. The spectrometer is well suited for solar low-frequency radio observations pertinent to space weather research. Five instruments of the type were constructed until now and put into operation at several sites, including Bleien (Zurich) and NRAO (USA). First results in the 45 - 870 MHz range are presented. Some of them were recorded in a preliminary setup during the time of high solar activity in October and November 2003.

  9. Re: Potomac River Generating Station Department of Energy, Case...

    Office of Environmental Management (EM)

    PEPCO is providing you with information regarding the planned transmission maintenance outage Notification of Planned 230kV Outage at Potomac River Generating Station Comments and...

  10. Re: Potomac River Generating Station Department of Energy Case...

    Energy Savers [EERE]

    PEPCO is providing you with information regarding the planned transmission maintenance outage Re: Potomac River Generating Station Department of Energy Case No. EO-05-01: PEPCO is...

  11. Sandia Energy - More California Gas Stations Can Provide Hydrogen...

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

    More California Gas Stations Can Provide Hydrogen than Previously Thought, Sandia Study Says Home Infrastructure Security Energy Transportation Energy CRF Facilities News News &...

  12. Webinar May 12: Overview of Station Analysis Tools Developed...

    Energy Savers [EERE]

    Daylight Time. This webinar will provide a basic introduction to two new models-the Hydrogen Refueling Station Analysis Model (HRSAM) and the Hydrogen Financial Analysis Scenario...

  13. New York Nuclear Profile - Nine Mile Point Nuclear Station

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

    Nine Mile Point Nuclear Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License...

  14. New Jersey Nuclear Profile - PSEG Salem Generating Station

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

    PSEG Salem Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License...

  15. New Jersey Nuclear Profile - PSEG Hope Creek Generating Station

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

    PSEG Hope Creek Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License...

  16. California Nuclear Profile - San Onofre Nuclear Generating Station

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

    San Onofre Nuclear Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License...

  17. Illinois Nuclear Profile - LaSalle Generating Station

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

    LaSalle Generating Station" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration...

  18. Microgrid V2G Charging Station Interconnection Testing (Presentation)

    SciTech Connect (OSTI)

    Simpson, M.

    2013-07-01

    This presentation by Mike Simpson of the National Renewable Energy Laboratory (NREL) describes NREL's microgrid vehicle-to-grid charging station interconnection testing.

  19. H2FIRST Reference Station Design Task: Project Deliverable 2...

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

    98 List of Tables Table ES-1. Station Types Selected for Detailed Reference Design Development ... v Table 1. Changed Input Parameters...

  20. College Station Utilities- Residential Energy Back II Rebate Program

    Broader source: Energy.gov [DOE]

    College Station Utilities offers an incentive for residential customers to install energy efficient HVAC equipment through the Energy Back II Program. Rebates only apply for replacements in...

  1. EECBG Success Story: Police Station Triples Solar Power - and...

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

    the North Community Police Substation in Henderson, Nevada installed new, roof-top photovoltaic panels that provide almost 40% of the station's electricity, up from 12.5%....

  2. NREL Dedicates Advanced Hydrogen Fueling Station - News Releases...

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

    Dedicates Advanced Hydrogen Fueling Station Ceremony Coincides With National Hydrogen and Fuel Cell Day October 8, 2015 The Energy Department's National Renewable Energy Laboratory...

  3. 20,000 and Counting: Alternative Fueling and Charging Stations...

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

    or by vehicle technology. Shannon Shea Clean Cities Communications Manager Thanks to the Energy Department's Alternative Fueling Station Locator tool, it's easier than ever for...

  4. Distributed Hydrogen Fueling Station Based on GEGR SCPO Technology...

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

    Fueling Station Based on GEGR SCPO Technology (Presentation) Presented at the 2007 Bio-Derived Liquids to Hydrogen Distributed Reforming Working Group held November 6, 2007 in...

  5. 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

    1996-07-22

    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.

  6. 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)

    2012-11-10

    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.

  7. 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)

    2013-10-20

    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.

  8. PHYSICAL CONSTRAINTS ON FAST RADIO BURSTS

    SciTech Connect (OSTI)

    Luan, Jing; Goldreich, Peter

    2014-04-20

    Fast radio bursts (FRBs) are isolated, ms radio pulses with dispersion measure (DM) of order 10{sup 3} pc cm{sup –3}. Galactic candidates for the DM of high latitude bursts detected at GHz frequencies are easily dismissed. DM from bursts emitted in stellar coronas are limited by free-free absorption and those from H II regions are bounded by the nondetection of associated free-free emission at radio wavelengths. Thus, if astronomical, FRBs are probably extragalactic. FRB 110220 has a scattering tail of ?5.6 ± 0.1 ms. If the electron density fluctuations arise from a turbulent cascade, the scattering is unlikely to be due to propagation through the diffuse intergalactic plasma. A more plausible explanation is that this burst sits in the central region of its host galaxy. Pulse durations of order ms constrain the sizes of FRB sources implying high brightness temperatures that indicates coherent emission. Electric fields near FRBs at cosmological distances would be so strong that they could accelerate free electrons from rest to relativistic energies in a single wave period.

  9. Solar Powered Radioactive Air Monitoring Stations

    SciTech Connect (OSTI)

    Barnett, J. M.; Bisping, Lynn E.; Gervais, Todd L.

    2013-10-30

    Environmental monitoring of ambient air for radioactive material is required as stipulated in the PNNL Site radioactive air license. Sampling ambient air at identified preferred locations could not be initially accomplished because utilities were not readily available. Therefore, solar powered environmental monitoring systems were considered as a possible option. PNNL purchased two 24-V DC solar powered environmental monitoring systems which consisted of solar panels, battery banks, and sampling units. During an approximate four month performance evaluation period, the solar stations operated satisfactorily at an on-site test location. They were subsequently relocated to their preferred locations in June 2012 where they continue to function adequately under the conditions found in Richland, Washington.

  10. Robust bearing estimation for 3-component stations

    SciTech Connect (OSTI)

    CLAASSEN,JOHN P.

    2000-02-01

    A robust bearing estimation process for 3-component stations has been developed and explored. The method, called SEEC for Search, Estimate, Evaluate and Correct, intelligently exploits the inherent information in the arrival at every step of the process to achieve near-optimal results. In particular the approach uses a consistent framework to define the optimal time-frequency windows on which to make estimates, to make the bearing estimates themselves, to construct metrics helpful in choosing the better estimates or admitting that the bearing is immeasurable, and finally to apply bias corrections when calibration information is available to yield a single final estimate. The algorithm was applied to a small but challenging set of events in a seismically active region. It demonstrated remarkable utility by providing better estimates and insights than previously available. Various monitoring implications are noted from these findings.

  11. SURVEYING THE DYNAMIC RADIO SKY WITH THE LONG WAVELENGTH DEMONSTRATOR ARRAY

    SciTech Connect (OSTI)

    Lazio, T. Joseph W.; Clarke, Tracy E.; Lane, W. M.; Gross, C.; Kassim, N. E.; Hicks, B.; Polisensky, E.; Stewart, K.; Ray, P. S.; Wood, D.; York, J. A.; Kerkhoff, A.; Dalal, N. Paravastu; Cohen, A. S.; Erickson, W. C.

    2010-12-15

    This paper presents a search for radio transients at a frequency of 73.8 MHz (4 m wavelength) using the all-sky imaging capabilities of the Long Wavelength Demonstrator Array (LWDA). The LWDA was a 16-dipole phased array telescope, located on the site of the Very Large Array in New Mexico. The field of view of the individual dipoles was essentially the entire sky, and the number of dipoles was sufficiently small that a simple software correlator could be used to make all-sky images. From 2006 October to 2007 February, we conducted an all-sky transient search program, acquiring a total of 106 hr of data; the time sampling varied, being 5 minutes at the start of the program and improving to 2 minutes by the end of the program. We were able to detect solar flares, and in a special-purpose mode, radio reflections from ionized meteor trails during the 2006 Leonid meteor shower. We detected no transients originating outside of the solar system above a flux density limit of 500 Jy, equivalent to a limit of no more than about 10{sup -2} events yr{sup -1} deg{sup -2}, having a pulse energy density {approx}>1.5 x 10{sup -20} J m{sup -2} Hz{sup -1} at 73.8 MHz for pulse widths of about 300 s. This event rate is comparable to that determined from previous all-sky transient searches, but at a lower frequency than most previous all-sky searches. We believe that the LWDA illustrates how an all-sky imaging mode could be a useful operational model for low-frequency instruments such as the Low Frequency Array, the Long Wavelength Array station, the low-frequency component of the Square Kilometre Array, and potentially the Lunar Radio Array.

  12. Project X Energy Station Workshop Report. Report by the Organizers and Co-Conveners of the Project X Energy Station Workshop

    SciTech Connect (OSTI)

    Asner, David M.; Hurh, Patrick; Brady Raap, Michaele C.; Gohar, Yoursy; Peterson, Mary E.; Pithcer, Eric; Riemer, Bernie; Senor, David J.; Wootan, David W.

    2013-06-14

    Project X Energy Station Workshop Report Report by the Organizers and Co-Conveners of the Project X Energy Station Workshop

  13. On the Radio and Optical Luminosity Evolution of Quasars

    SciTech Connect (OSTI)

    Singal, J.; Petrosian, V.; Lawrence, A.; Stawarz, L.; /JAXA, Sagamihara /Jagiellonian U., Astron. Observ.

    2011-05-20

    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.

  14. Radio-Frequency Interference from Digital Television Patrick C. Crane

    E-Print Network [OSTI]

    Ellingson, Steven W.

    , in Albuquerque channels 2, 4, and 5 are currently used by high-power analog television stations. After the transition to DTV on 19 February 2009, all the high-power analog television stations in New Mexico RFI and failed. The second issue is the conversion of low-power television stations and translators

  15. Grad Princeton Lakeside Lawrence Wegmans Walmart Trader Lawrence Lakeside Princeton College Station Apts Apts Joe's Apts Apts Station

    E-Print Network [OSTI]

    Rowley, Clarence W.

    Grad Princeton Lakeside Lawrence Wegmans Walmart Trader Lawrence Lakeside Princeton College Station:53 PM Grad Princeton Lakeside Lawrence Wegmans Walmart Trader Lawrence Lakeside Princeton College

  16. RADIO FREQUENCY IDENTIFICATION DEVICES: EFFECTIVENESS IN IMPROVING SAFEGUARDS AT GAS-CENTRIFUGE URANIUM-ENRICHMENT PLANTS.

    SciTech Connect (OSTI)

    JOE,J.

    2007-07-08

    Recent advances in radio frequency identification devices (RFIDs) have engendered a growing interest among international safeguards experts. Potentially, RFIDs could reduce inspection work, viz. the number of inspections, number of samples, and duration of the visits, and thus improve the efficiency and effectiveness of international safeguards. This study systematically examined the applications of RFIDs for IAEA safeguards at large gas-centrifuge enrichment plants (GCEPs). These analyses are expected to help identify the requirements and desirable properties for RFIDs, to provide insights into which vulnerabilities matter most, and help formulate the required assurance tests. This work, specifically assesses the application of RFIDs for the ''Option 4'' safeguards approach, proposed by Bruce Moran, U. S. Nuclear Regulatory Commission (NRC), for large gas-centrifuge uranium-enrichment plants. The features of ''Option 4'' safeguards include placing RFIDs on all feed, product and tails (F/P/T) cylinders, along with WID readers in all FP/T stations and accountability scales. Other features of Moran's ''Option 4'' are Mailbox declarations, monitoring of load-cell-based weighing systems at the F/P/T stations and accountability scales, and continuous enrichment monitors. Relevant diversion paths were explored to evaluate how RFIDs improve the efficiency and effectiveness of safeguards. Additionally, the analysis addresses the use of RFIDs in conjunction with video monitoring and neutron detectors in a perimeter-monitoring approach to show that RFIDs can help to detect unidentified cylinders.

  17. The Smithsonian Marine Station welcomes research scientists who wish to conduct studies at the Marine Station on a space-available basis. The following is a list of fees for laboratory space and use of Station

    E-Print Network [OSTI]

    Miller, Scott

    The Smithsonian Marine Station welcomes research scientists who wish to conduct studies at the Marine Station on a space-available basis. The following is a list of fees for laboratory space and use of Station equipment. Smithsonian Marine Station at Fort Pierce Fees for 2014 Tyson House lodging

  18. Evaluation of Station Post Porcelain Insulators with Room Temperature

    E-Print Network [OSTI]

    Evaluation of Station Post Porcelain Insulators with Room Temperature Vulcanized (RTV) Silicone to Engineer the Future Electric Energy System #12;Evaluation of Station Post Porcelain Insulators with Room and analysis of porcelain post insulators that were coated with a room temperature vulcanized (RTV) silicone

  19. General Information Relating to the Texas Agricultural Experiment Station

    E-Print Network [OSTI]

    Curtis, Geo. W. (George Washington)

    1891-01-01

    EXPERIMENT STATION. BULLETIN NO. 17. AUGUST, 1891. GENERAL INFORMATION RELATING TO THE n Texas Ae;ricuItural C Experiment Station: LAWS BUTFIORIZISG ESTABLISHPIIEKT; ORGANIZATIOS ASD OF- FICERS; RESULTS TO DATE; IITORK UNDER WAY; ISVENTORP.... ............................................... Horticultnrist. ................ n. ADRIAXCE, 31. S. .Meteorologist, Asst. Chemist. ............................. J. \\lt. C~RSON,. Assistant to Director. ........................... J. M. CARSOX.. .Assistant Agriculturist. ........... P. S. TILSON, B. S. A...

  20. Upcoming H2USA Workshop: Hydrogen Fueling Station Component Listings

    Broader source: Energy.gov [DOE]

    H2USA will host an online workshop about hydrogen fueling station component listings on April 22 from 2 to 3:30 p.m. Eastern Daylight Time. This workshop will focus on the need for components for hydrogen fueling stations to be listed by Nationally Recognized Testing Laboratories (NRTLs).

  1. DEVELOPMENT OF A TURNKEY COMMERCIAL HYDROGEN FUELING STATION

    E-Print Network [OSTI]

    NREL/CP-610-32405 #12;Approach Within this program, the development efforts are expected to build evaluations for each major sub-system in the Fueling Station will be completed. In Phase 2, sub-system R&D will be performed to test the concepts put forth in Phase 1. Also, the technical viability and Fueling Station costs

  2. Validation of an Integrated Hydrogen Energy Station

    SciTech Connect (OSTI)

    Edward C. Heydorn

    2012-10-26

    This report presents the results of a 10-year project conducted by Air Products and Chemicals, Inc. (Air Products) to determine the feasibility of coproducing hydrogen with electricity. The primary objective was to demonstrate the technical and economic viability of a hydrogen energy station using a high-temperature fuel cell designed to produce power and hydrogen. This four-phase project had intermediate go/no-go decisions and the following specific goals: �¢���¢ Complete a technical assessment and economic analysis of the use of high-temperature fuel cells, including solid oxide and molten carbonate, for the co-production of power and hydrogen (energy park concept). �¢���¢ Build on the experience gained at the Las Vegas H2 Energy Station and compare/contrast the two approaches for co-production. �¢���¢ Determine the applicability of co-production from a high-temperature fuel cell for the existing merchant hydrogen market and for the emerging hydrogen economy. �¢���¢ Demonstrate the concept on natural gas for six months at a suitable site with demand for both hydrogen and electricity. �¢���¢ Maintain safety as the top priority in the system design and operation. �¢���¢ Obtain adequate operational data to provide the basis for future commercial activities, including hydrogen fueling stations. Work began with the execution of the cooperative agreement with DOE on 30 September 2001. During Phase 1, Air Products identified high-temperature fuel cells as having the potential to meet the coproduction targets, and the molten carbonate fuel cell system from FuelCell Energy, Inc. (FuelCell Energy) was selected by Air Products and DOE following the feasibility assessment performed during Phase 2. Detailed design, construction and shop validation testing of a system to produce 250 kW of electricity and 100 kilograms per day of hydrogen, along with site selection to include a renewable feedstock for the fuel cell, were completed in Phase 3. The system also completed six months of demonstration operation at the wastewater treatment facility operated by Orange County Sanitation District (OCSD, Fountain Valley, CA). As part of achieving the objective of operating on a renewable feedstock, Air Products secured additional funding via an award from the California Air Resources Board. The South Coast Air Quality Management District also provided cost share which supported the objectives of this project. System operation at OCSD confirmed the results from shop validation testing performed during Phase 3. Hydrogen was produced at rates and purity that met the targets from the system design basis, and coproduction efficiency exceeded the 50% target set in conjunction with input from the DOE. Hydrogen production economics, updated from the Phase 2 analysis, showed pricing of $5 to $6 per kilogram of hydrogen using current gas purification systems. Hydrogen costs under $3 per kilogram are achievable if next-generation electrochemical separation technologies become available.

  3. Simultaneous observations of Jovian quasi-periodic radio emissions by the Galileo and Cassini spacecraft

    E-Print Network [OSTI]

    Gurnett, Donald A.

    of many Jovian plasma wave and radio emissions. One of these emissions is Jovian type III radio emissions); 2784 Magnetospheric Physics: Solar wind/magnetosphere interactions; 6984 Radio Science: Waves in plasma rich in radio and plasma wave emissions. One interesting radio emission component is the quasi

  4. 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

  5. Sol3g SL | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION J APPENDIX ECoop Inc JumpHeter Battery TechnologySocovoltaic Systems Jump to:SoftSuisse AG Jump

  6. 3G Energi | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EAand Dalton Jump to:Wylie,InformationSpeciesRegister of HistoricCG

  7. Radio Planning of Energy-Aware Cellular Networks

    E-Print Network [OSTI]

    Silvia Boiardi

    2010-11-03

    Nov 3, 2010 ... Radio Planning of Energy-Aware Cellular Networks. Silvia Boiardi(Silvia.Boiardi ***at*** gerad.ca) Capone Antonio(antonio.capone ***at*** ...

  8. 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)

    2013-10-20

    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.

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

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

    Filter Sensor and Controls for Advanced Low-Pressure Drop Systems to Reduce Engine Fuel Consumption Vehicle Technologies Office Merit Review 2014: Development of Radio Frequency...

  10. CONTRIBUTION OF GAMMA-RAY-LOUD RADIO GALAXIES' CORE EMISSIONS...

    Office of Scientific and Technical Information (OSTI)

    The Fermi gamma-ray satellite has recently detected gamma-ray emissions from radio galaxy cores. From these samples, we first examine the correlation between the luminosities...

  11. Field Stations Compliance CommitteesAdministrative Units Research Units

    E-Print Network [OSTI]

    Walker, Matthew P.

    & Regional Development Kavli Energy Nanosciences Institute Miller Institute for Basic Research Radio Diving & Small Boat Safety Stem Cell Research Oversight Archaeological Research Facility Berkeley Energy Care Research Administration & Compliance -Sponsored Projects Office -Office of Animal Care & Use

  12. Background Paper: Politics and Interactive Media in Zambia

    E-Print Network [OSTI]

    Simutanyi, Neo; Fraser, Alastair; Milapo, Nalukui

    2015-06-23

    areas, particularly in Lusaka (OSISA, 2010). While radio broadcasting is widespread, most people outside the cities are only able to receive ZNBC and one local or community radio stations. There is at least one local or community radio station in each... phone technology has revolutionised audience engagement with the media, as people can use their mobile phones to access broadcast media through phone-in and text-in, as well as access radio. Increasingly, access to ‘smart’ phone handsets and 3G signals...

  13. Statistics of solar microwave radio burst spectra with implications for operations of microwave radio systems

    E-Print Network [OSTI]

    .6 GHz to employ an adaptable mode wherein, if the prediction of solar activity suggested the possible [Hey, 1946], the understanding and prediction of solar events that might produce interfering noiseStatistics of solar microwave radio burst spectra with implications for operations of microwave

  14. 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

  15. Revealing Cosmic Magnetism with Radio Polarimetry

    E-Print Network [OSTI]

    Bryan M. Gaensler

    2007-12-18

    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. High efficiency, oxidation resistant radio frequency susceptor

    DOE Patents [OSTI]

    Besmann, Theodore M.; Klett, James W.

    2004-10-26

    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.

  17. 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: Alternative Fuels Data Center Homesum_a_epg0_fpd_mmcf_m.xls" ,"Available from WebQuantity ofkandz-cm11 OutreachProductswsicloudwsiclouddenDVA N C E D B LReports from the CloudGEGR-N Goods POCTBT |CUD-55 /Allen Radio

  18. 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 on Google Bookmark EERE: Alternative Fuels Data Center Home Page on QA:QA J-E-1 SECTION JEnvironmental Jump to:EA EIS Report UrlNM-b < RAPID‎ |RENERCO RenewableRGSRadarEnergyRadio

  19. Irradiation Environment of the Materials Test Station

    SciTech Connect (OSTI)

    Pitcher, Eric John

    2012-06-21

    Conceptual design of the proposed Materials Test Station (MTS) at the Los Alamos Neutron Science Center (LANSCE) is now complete. The principal mission is the irradiation testing of advanced fuels and materials for fast-spectrum nuclear reactor applications. The neutron spectrum in the fuel irradiation region of MTS is sufficiently close to that of fast reactor that MTS can match the fast reactor fuel centerline temperature and temperature profile across a fuel pellet. This is an important characteristic since temperature and temperature gradients drive many phenomena related to fuel performance, such as phase stability, stoichiometry, and fission product transport. The MTS irradiation environment is also suitable in many respects for fusion materials testing. In particular, the rate of helium production relative to atomic displacements at the peak flux position in MTS matches well that of fusion reactor first wall. Nuclear transmutation of the elemental composition of the fusion alloy EUROFER97 in MTS is similar to that expected in the first wall of a fusion reactor.

  20. Severe Accident Test Station Activity Report

    SciTech Connect (OSTI)

    Pint, Bruce A.; Terrani, Kurt A.

    2015-06-01

    Enhancing safety margins in light water reactor (LWR) severe accidents is currently the focus of a number of international R&D programs. The current UO2/Zr-based alloy fuel system is particularly susceptible since the Zr-based cladding experiences rapid oxidation kinetics in steam at elevated temperatures. Therefore, alternative cladding materials that offer slower oxidation kinetics and a smaller enthalpy of oxidation can significantly reduce the rate of heat and hydrogen generation in the core during a coolant-limited severe accident. In the U.S. program, the high temperature steam oxidation performance of accident tolerant fuel (ATF) cladding solutions has been evaluated in the Severe Accident Test Station (SATS) at Oak Ridge National Laboratory (ORNL) since 2012. This report summarizes the capabilities of the SATS and provides an overview of the oxidation kinetics of several candidate cladding materials. A suggested baseline for evaluating ATF candidates is a two order of magnitude reduction in the steam oxidation resistance above 1000ºC compared to Zr-based alloys. The ATF candidates are categorized based on the protective external oxide or scale that forms during exposure to steam at high temperature: chromia, alumina, and silica. Comparisons are made to literature and SATS data for Zr-based alloys and other less-protective materials.

  1. Conceptual design of a submerged power station

    SciTech Connect (OSTI)

    Herring, J.S. )

    1992-01-01

    Providing safe and sustainable energy to the world's increasing population will be one of the major challenges of the 21st century. Idaho National Engineering Laboratory is developing the concept of a submerged power stations (SPS). The reactor is located in the forward part of the vessel, while the turbine and generator are in the midsection, and the control and crew quarters are located at the opposite end of the vessel. The current design of the SPS has a 22.5-m o.d., is 146 m long, and has a total mass, including seawater in the annular region between the hulls, of 47,000 t. The SPS would be operated in 20 to 100 m of water at a distance of 10 to 30 km from the shore and would generate 300 to 600 MW(electric) transmitted to shore by undersea cables. The SPS has the advantages of centralized fabrication and maintenance. The author believes that the SPS has significant safety and environmental advantages.

  2. Economic Analysis of Hydrogen Energy Station Concepts: Are "H 2E-Stations" a Key Link to a Hydrogen Fuel Cell Vehicle Infrastructure?

    E-Print Network [OSTI]

    Lipman, Timothy E.; Edwards, Jennifer L.; Kammen, Daniel M.

    2002-01-01

    California location for the energy station concepts, and we include electricity and natural gas costs

  3. Solar-Assisted Electric Vehicle Charging Station Interim Report

    SciTech Connect (OSTI)

    Lapsa, Melissa Voss; Durfee, Norman; Maxey, L Curt; Overbey, Randall M

    2011-09-01

    Oak Ridge National Laboratory (ORNL) has been awarded $6.8 million in the Department of Energy (DOE) American Recovery and Reinvestment Act (ARRA) funds as part of an overall $114.8 million ECOtality grant with matching funds from regional partners to install 125 solar-assisted Electric Vehicle (EV) charging stations across Knoxville, Nashville, Chattanooga, and Memphis. Significant progress has been made toward completing the scope with the installation of 25 solar-assisted charging stations at ORNL; six stations at Electric Power Research Institute (EPRI); and 27 stations at Nissan's Smyrna and Franklin sites, with three more stations under construction at Nissan's new lithium-ion battery plant. Additionally, the procurement process for contracting the installation of 34 stations at Knoxville, the University of Tennessee Knoxville (UTK), and Nashville sites is underway with completion of installation scheduled for early 2012. Progress is also being made on finalizing sites and beginning installations of 30 stations in Nashville, Chattanooga, and Memphis by EPRI and Tennessee Valley Authority (TVA). The solar-assisted EV charging station project has made great strides in fiscal year 2011. A total of 58 solar-assisted EV parking spaces have been commissioned in East and Middle Tennessee, and progress on installing the remaining 67 spaces is well underway. The contract for the 34 stations planned for Knoxville, UTK, and Nashville should be underway in October with completion scheduled for the end of March 2012; the remaining three Nissan stations are under construction and scheduled to be complete in November; and the EPRI/TVA stations for Chattanooga, Vanderbilt, and Memphis are underway and should be complete by the end of March 2012. As additional Nissan LEAFs are being delivered, usage of the charging stations has increased substantially. The project is on course to complete all 125 solar-assisted EV charging stations in time to collect meaningful data by the end of government fiscal year 2012. Lessons learned from the sites completed thus far are being incorporated and are proving to be invaluable in completion of the remaining sites.

  4. 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

    2008-03-31

    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.

  5. 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

  6. Simulation of radio emission from air showers in atmospheric electric fields

    E-Print Network [OSTI]

    Buitink, S.

    2010-01-01

    the propagation of the radio waves. In this work we use theof propagation of the radio wave. The three-dimensionalof propagation of the radio wave cannot be unambiguously de?

  7. PHASE AND AMPLITUDE CONTROL OF THE RADIO FREQUENCY WAVE IN THE TWO-BEAM ACCELERATOR

    E-Print Network [OSTI]

    Kuenning, R.W.

    2008-01-01

    CONTROL OF THE RADIO FREQUENCY WAVE IN THE TWO-BEAMCONTROL OF THE RADIO FREQUENCY WAVE IN THE TWO-BEAMsensitivity of the radio frequency (rf) wave generated by

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

    E-Print Network [OSTI]

    Sessler, Andrew M.

    2008-01-01

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

  9. Bridging the Gap Between Transportation and Stationary Power: Hydrogen Energy Stations and their Implications for the Transportation Sector

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Lipman, Timothy; Unnasch, Stephen

    2005-01-01

    and Stationary Power: Hydrogen Energy Stations and theirand Stationary Power: Hydrogen Energy Stations and their2004) for power parks & energy stations. (10) DESIGNS/

  10. Bridging the Gap Between Transportation and Stationary Power: Hydrogen Energy Stations and their Implications for the Transportation Sector

    E-Print Network [OSTI]

    Weinert, Jonathan X.; Lipman, Timothy; Unnasch, Stephen

    2005-01-01

    Economic Analysis of Hydrogen Energy Station Concepts,E 2 Four Potential Types of Hydrogen Energy Stations VehicleOperational Toronto Hydrogen Energy Station Stationary PEMFC

  11. Canonical Particle Acceleration in FRI Radio Galaxies

    E-Print Network [OSTI]

    Andrew Young; Lawrence Rudnick; Debora Katz; Tracey DeLaney; Namir E. Kassim; Kazuo Makishima

    2005-02-26

    Matched resolution multi-frequency VLA observations of four radio galaxies are used to derive the asymptotic low energy slope of the relativistic electron distribution. Where available, low energy slopes are also determined for other sources in the literature. They provide information on the acceleration physics independent of radiative and other losses, which confuse measurements of the synchrotron spectra in most radio, optical and X-ray studies. We find a narrow range of inferred low energy electron energy slopes, n(E)=const*E^-2.1 for the currently small sample of lower luminosity sources classified as FRI (not classical doubles). This distribution is close to, but apparently inconsistent with, the test particle limit of n(E)=const*E^-2.0 expected from strong diffusive shock acceleration in the non-relativistic limit. Relativistic shocks or those modified by the back-pressure of efficiently accelerated cosmic rays are two alternatives to produce somewhat steeper spectra. We note for further study the possiblity of acceleration through shocks, turbulence or shear in the flaring/brightening regions in FRI jets as they move away from the nucleus. Jets on pc scales and the collimated jets and hot spots of FRII (classical double) sources would be governed by different acceleration sites and mechanisms; they appear to show a much wider range of spectra than for FRI sources.

  12. Quark Nova Model for Fast Radio Bursts

    E-Print Network [OSTI]

    Zachary Shand; Amir Ouyed; Nico Koning; Rachid Ouyed

    2015-05-29

    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.

  13. On the Nature of Pulsar Radio Emission

    E-Print Network [OSTI]

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

    1998-01-01

    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...

  14. Beam calibration of radio telescopes with drones

    E-Print Network [OSTI]

    Chang, Chihway; Refregier, Alexandre; Amara, Adam; Glauser, Adrian; Casura, Sarah

    2015-01-01

    We present a multi-frequency far-field beam map for the 5m dish telescope at the Bleien Observatory measured using a commercially available drone. We describe the hexacopter drone used in this experiment, the design of the flight pattern, and the data analysis scheme. This is the first application of this calibration method to a single dish radio telescope in the far-field. The high signal-to-noise data allows us to characterise the beam pattern with high accuracy out to at least the 4th side-lobe. The resulting 2D beam pattern is compared with that derived from a more traditional calibration approach using an astronomical calibration source. We discuss the advantages of this method compared to other beam calibration methods. Our results show that this drone-based technique is very promising for ongoing and future radio experiments, where the knowledge of the beam pattern is key to obtaining high-accuracy cosmological and astronomical measurements.

  15. Envelope amplifier for broadband base-station envelope tracking power amplifier

    E-Print Network [OSTI]

    Zhu, Qiuyao

    2011-01-01

    Therefore, today’s base-station power amplifiers need to bethis chapter, the base-station power amplifier will be firstin section 1.3. Base-station Power Amplifiers Fig.1.1

  16. Buried waste integrated demonstration human engineered control station. Final report

    SciTech Connect (OSTI)

    Not Available

    1994-09-01

    This document describes the Human Engineered Control Station (HECS) project activities including the conceptual designs. The purpose of the HECS is to enhance the effectiveness and efficiency of remote retrieval by providing an integrated remote control station. The HECS integrates human capabilities, limitations, and expectations into the design to reduce the potential for human error, provides an easy system to learn and operate, provides an increased productivity, and reduces the ultimate investment in training. The overall HECS consists of the technology interface stations, supporting engineering aids, platform (trailer), communications network (broadband system), and collision avoidance system.

  17. 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

  18. Software Defined Radio Architecture Survey for Cognitive Testbeds

    E-Print Network [OSTI]

    Risset, Tanguy

    ]. While implementing the whole radio node in software is still an utopia, many architectures now hittingSoftware Defined Radio Architecture Survey for Cognitive Testbeds Micka¨el Dardaillon, Kevin propose a classification related to the architectural organization of the pro- totypes and provide some

  19. Near-Optimal Radio Use For Wireless Network Synchronization

    E-Print Network [OSTI]

    Kohler, Eddie

    of energy. We distill a clean theoretical formulation of minimizing radio use and present near either switch their radios off to save energy (and hence, can neither send nor receive messages-hungry. As the power costs of process- ing, memory, and other computing components drop, the lifetime of a battery

  20. NearOptimal Radio Use For Wireless Network Synchronization #

    E-Print Network [OSTI]

    Ostrovsky, Rafail

    of energy. We distill a clean theoretical formulation of minimizing radio use and present near either switch their radios o# to save energy (and hence, can neither send nor receive messages­hungry. As the power costs of process­ ing, memory, and other computing components drop, the lifetime of a battery

  1. Energy-Constrained Cooperative Spectrum Sensing in Cognitive Radio Networks

    E-Print Network [OSTI]

    Shihada, Basem

    Energy-Constrained Cooperative Spectrum Sensing in Cognitive Radio Networks Xinxin Feng 1 duration to strike a balance between energy consumption and system throughput. We focus on a cooperative is an impor- tant issue in Cognitive Radio (CR) networks, which could greatly affect energy efficiency

  2. Radio-Frequency Rectification on Membrane Bound Pores

    E-Print Network [OSTI]

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

    2007-09-12

    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.

  3. 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

  4. Coronal Magnetography with FASR Magnetic Sensitivity of Radio Emission

    E-Print Network [OSTI]

    Coronal Magnetography with FASR - 1 - Magnetic Sensitivity of Radio Emission There are three main radio emission mechanisms that operate in the Sun. In order of their usefulness for direct measurement of coronal magnetic fields, the broad families are gyroemission, free-free emission, and plasma emission

  5. Coronal Magnetography with FASR Magnetic Sensitivity of Radio Emission

    E-Print Network [OSTI]

    Coronal Magnetography with FASR ­ 1 ­ Magnetic Sensitivity of Radio Emission There are three main radio emission mechanisms that operate in the Sun. In order of their usefulness for direct measurement of coronal magnetic fields, the broad families are gyroemission, free­free emission, and plasma emission

  6. Google's Auction for Radio and TV Ads Preliminary version

    E-Print Network [OSTI]

    Cortes, Corinna

    Google's Auction for Radio and TV Ads Preliminary version Noam Nisan Jason Bayer Deepak Chandra Tal. Abstract This document describes the auction system used by Google for allocation and pricing of TV ads and Radio ads. It is based on a simultaneous ascending auction, and has been in use since September 2008. 0

  7. Energy Efficient Resource Allocation for Cognitive Radios: A Generalized Sensing

    E-Print Network [OSTI]

    Shihada, Basem

    1 Energy Efficient Resource Allocation for Cognitive Radios: A Generalized Sensing Analysis Abdul In this paper, we propose two resource allocation schemes for energy efficient cognitive radio systems. Our-sensing information, adaptive sensing thresholds, and adaptive power to achieve an energy efficient system. We

  8. Department of Electrical & Computer Engineering SIGNAL PROCESSING FOR COGNITIVE RADIOS

    E-Print Network [OSTI]

    New Mexico, University of

    Department of Electrical & Computer Engineering SIGNAL PROCESSING FOR COGNITIVE RADIOS (A Fall 2015 of signal processing and machine learning in achieving self-awareness, subsequent intelligent decision-making and radio reconfiguration cannot be over-emphasized. In fact, one may argue that it is signal processing

  9. ARQ PROTOCOL FEATURES FOR HF RADIO LINKS Eric E. Johnson

    E-Print Network [OSTI]

    Johnson, Eric E.

    ARQ PROTOCOL FEATURES FOR HF RADIO LINKS Eric E. Johnson New Mexico State University ABSTRACT The explosion of interest in using Internet-style applica- tions over wireless links prompts investigation links with Internet-style workloads. The investigation is focused on high-frequency radio links

  10. Interior Structure and Seasonal Mass Redistribution of Mars from Radio

    E-Print Network [OSTI]

    Manga, Michael

    Interior Structure and Seasonal Mass Redistribution of Mars from Radio Tracking of Mars Pathfinder. Analysis of radio tracking measurements from the Vi- king landers has determined the normal- ized polar. The precession is driven by the gravita- tional torque of the sun acting on Mars' oblate figure

  11. Radio tracking of Phoenix during its landing on Mars

    E-Print Network [OSTI]

    Withers, Paul

    Radio tracking of Phoenix during its landing on Mars Paul Withers Center for Space Physics, Boston University (withers@bu.edu) MEX/VEX Radio Science Meeting 2010.03.18-19 Bonn, Germany #12;Phoenix atmospheric for a-aero using known quantities Re-arrange: #12;Next steps · Find f(t) for Phoenix direct

  12. 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 Vancouver, B.C. V7M 3H7 #12;S-1 CITY OF PRINCE GEORGE RADIO FREQUENCY TREATMENT OF PARTIALLY DIGESTED/DEWATERED BIOSOLIDS FINAL REPORT SUMMARY The City of Prince George recently proposed to investigate the possibility

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

    E-Print Network [OSTI]

    Smith, Daniel J B

    2015-01-01

    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...

  14. Fossil shell emission in dying radio loud AGNs

    E-Print Network [OSTI]

    Kino, M; Kawakatu, N; Orienti, M; Nagai, H; Wajima, K; Itoh, R

    2015-01-01

    We investigate shell emission associated with dying radio loud AGNs. First, based on our recent work by Ito et al. (2015), we describe the dynamical and spectral evolutions of shells after stopping the jet energy injection. We find that the shell emission overwhelms that of the radio lobes soon after stopping the jet energy injection because fresh electrons are continuously supplied into the shell via the forward shock while the radio lobes rapidly fade out without jet energy injection. We find that such fossil shells can be a new class of target sources for SKA telescope. Next, we apply the model to the nearby radio source 3C84. Then, we find that the fossil shell emission in 3C84 is less luminous in radio band while it is bright in TeV gamma-ray band and it can be detectable by CTA.

  15. The Phoenix survey: the pairing fraction of faint radio sources

    E-Print Network [OSTI]

    A. Georgakakis; B. Mobasher; L. Cram; A. Hopkins

    1999-10-07

    The significance of tidal interactions in the evolution of the faint radio population (sub-mJy) is studied using a deep and homogeneous radio survey (1.4 GHz), covering an area of 3.14 deg$^2$ and complete to a flux density of 0.4 mJy. Optical photometric and spectroscopic data are also available for this sample. A statistical approach is employed to identify candidate physical associations between radio sources and optically selected `field' galaxies. We find an excess of close pairs around optically identified faint radio sources, albeit at a low significance level, implying that the pairing fraction of the sub-mJy radio sources is similar to that of `field' galaxies (at the same magnitude limit) but higher than that of local galaxies.

  16. The Phoenix Deep Survey: A Deep Microjansky Radio Survey

    E-Print Network [OSTI]

    J. Afonso; B. Mobasher; A. Hopkins; L. Cram

    1999-09-05

    The study of the nature of faint radio sources is of great importance since a significant fraction of these objects is thought to be composed of actively star-forming galaxies. Due to the increased sensitivity of radio telescopes, we are now not only able to catalogue large numbers of these sources in the sub-millijansky regime, but also to start the study of the nature of increasingly fainter microjansky sources. This paper presents a new very deep 1.4 GHz radio survey made as a part of the Phoenix Deep Survey, a project aimed to study the nature of the faintest radio sources. With a limiting sensitivity of 45 microJy, this new survey has allowed us to assemble a large number of sources with 1.4 GHz flux densities below 100 microJy. The resulting source counts and the analysis of the optical properties of the faintest radio sources are presented.

  17. SOARCA Peach Bottom Atomic Power Station Long-Term Station Blackout Uncertainty Analysis: Knowledge Advancement.

    SciTech Connect (OSTI)

    Gauntt, Randall O.; Mattie, Patrick D.; Bixler, Nathan E.; Ross, Kyle; Cardoni, Jeffrey N; Kalinich, Donald A.; Osborn, Douglas M.; Sallaberry, Cedric Jean-Marie; Ghosh, S. Tina

    2014-02-01

    This paper describes the knowledge advancements from the uncertainty analysis for the State-of- the-Art Reactor Consequence Analyses (SOARCA) unmitigated long-term station blackout accident scenario at the Peach Bottom Atomic Power Station. This work assessed key MELCOR and MELCOR Accident Consequence Code System, Version 2 (MACCS2) modeling uncertainties in an integrated fashion to quantify the relative importance of each uncertain input on potential accident progression, radiological releases, and off-site consequences. This quantitative uncertainty analysis provides measures of the effects on consequences, of each of the selected uncertain parameters both individually and in interaction with other parameters. The results measure the model response (e.g., variance in the output) to uncertainty in the selected input. Investigation into the important uncertain parameters in turn yields insights into important phenomena for accident progression and off-site consequences. This uncertainty analysis confirmed the known importance of some parameters, such as failure rate of the Safety Relief Valve in accident progression modeling and the dry deposition velocity in off-site consequence modeling. The analysis also revealed some new insights, such as dependent effect of cesium chemical form for different accident progressions. (auth)

  18. Survey Results and Analysis of the Cost and Efficiency of Various Operating Hydrogen Fueling Stations

    SciTech Connect (OSTI)

    Cornish, John

    2011-03-05

    Existing Hydrogen Fueling Stations were surveyed to determine capital and operational costs. Recommendations for cost reduction in future stations and for research were developed.

  19. Vision for Rollout of Fuel Cell Vehicles and Hydrogen Fuel Stations...

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

    Vision for Rollout of Fuel Cell Vehicles and Hydrogen Fuel Stations Vision for Rollout of Fuel Cell Vehicles and Hydrogen Fuel Stations This document establishes the California...

  20. Where the Rubber Meets the Road-- the Alternative Fuel Station Locator

    Broader source: Energy.gov [DOE]

    To use the Alternative Fuel Station Locator, travelers with alternative fuel vehicles just enter their address alternative fuel station locator mobile and pick their fuel.

  1. Strategy for international cooperation in planning the Chinese Space Station

    E-Print Network [OSTI]

    Foley, Jordan J. (Jordan James)

    2014-01-01

    After ten years of planning and pre-development, the Chinese government approved the space station project on September 25, 2010. In October 2010, the People's Republic of China (PRC) officially announced its independent ...

  2. Optimal command generation for maneuvering the space station 

    E-Print Network [OSTI]

    Bryson, Amy Louise

    2001-01-01

    The objective of this research is to obtain near minimum-fuel and minimum-time maneuver commands for large-angle maneuvers for the international space station. Attitude and angular velocity waypoints are generated using the method of differential...

  3. Waiting for TOD : developing in the Millbrae BART Station Area

    E-Print Network [OSTI]

    Shih, Janet Wei

    2012-01-01

    The suburban terminus station dedicates large amounts of land for parking in order to cater to its driving riders, and causes a trade-off tension between attracting ridership through providing park-and-rides and building ...

  4. Re: Potomac River Generating Station Department of Energy, Case...

    Office of Environmental Management (EM)

    2005 ("DOE Potomac River Order") Pepco hereby files this revised notice of the planned outage of the 230 kV circuits serving the Potomac River Substation, and through that station,...

  5. STDS08.COD: Climate Data from Weather Stations

    E-Print Network [OSTI]

    Whiting, John W. M.

    1986-01-01

    STDS08.COD: CLIMATE DATA FROM WEATHER STATIONS John W. M.84:279-298 (1982). The weather data are cited as coming fromFischer. Keywords: Climate. Weather. SCCS Codes. STDS08.CSV

  6. Development of a Turnkey Hydrogen Fueling Station Final Report

    SciTech Connect (OSTI)

    David E. Guro; Edward Kiczek; Kendral Gill; Othniel Brown

    2010-07-29

    The transition to hydrogen as a fuel source presents several challenges. One of the major hurdles is the cost-effective production of hydrogen in small quantities (less than 1MMscf/month). In the early demonstration phase, hydrogen can be provided by bulk distribution of liquid or compressed gas from central production plants; however, the next phase to fostering the hydrogen economy will likely include onsite generation and extensive pipeline networks to help effect a pervasive infrastructure. Providing inexpensive hydrogen at a fleet operator’s garage or local fueling station is a key enabling technology for direct hydrogen Fuel Cell Vehicles (FCVs). The objective of this project was to develop a comprehensive, turnkey, stand-alone, commercial hydrogen fueling station for FCVs with state-of-the-art technology that is cost-competitive with current hydrocarbon fuels. Such a station would promote the advent of the hydrogen fuel economy for buses, fleet vehicles, and ultimately personal vehicles. Air Products, partnering with the U.S. Department of Energy (DOE), The Pennsylvania State University, Harvest Energy Technology, and QuestAir, developed a turnkey hydrogen fueling station on the Penn State campus. Air Products aimed at designing a station that would have 65% overall station efficiency, 82% PSA (pressure swing adsorption) efficiency, and the capability of producing hydrogen at $3.00/kg (gge) H2 at mass production rates. Air Products designed a fueling station at Penn State from the ground up. This project was implemented in three phases. The first phase evaluated the various technologies available in hydrogen generation, compression, storage, and gas dispensing. In the second phase, Air Products designed the components chosen from the technologies examined. Finally, phase three entailed a several-month period of data collection, full-scale operation, maintenance of the station, and optimization of system reliability and performance. Based on field data analysis, it was determined by a proprietary hydrogen-analysis model that hydrogen produced from the station at a rate of 1500 kg/day and when produced at 1000 stations per year would be able to deliver hydrogen at a price of $3.03/kg (gge) H2. The station’s efficiency was measured to be 65.1%, and the PSA was tested and ran at an efficiency of 82.1%, thus meeting the project targets. From the study, it was determined that more research was needed in the area of hydrogen fueling. The overall cost of the hydrogen energy station, when combined with the required plot size for scaled-up hydrogen demands, demonstrated that a station using steam methane reforming technology as a means to produce on–site hydrogen would have limited utility in the marketplace. Alternative hydrogen supplies, such as liquid or pipeline delivery to a refueling station, need to be included in the exploration of alternative energy site layouts. These avenues need to be explored before a definitive refueling station configuration and commercialization pathway can be determined.

  7. Transfer stations and long-haul transport systems

    SciTech Connect (OSTI)

    Walsh, P.; Pferdehirt, W.; O'Leary, P. (Univ. of Wisconsin, Madison, WI (United States). Solid and Hazardous Waste Education Center)

    1993-12-01

    Transfer stations can be an important link between pickup at the curb and ultimate disposal, often allowing significant savings in the total costs to move wastes from the generator to the disposal site. A transfer station is simply a facility where collection trucks bring collected materials for loading into larger vehicles and subsequent shipment, usually to a landfill, waste-to-energy plant, or composting facility. Transferred wastes are typically shipped out in large trailers, but barges and railroad cars are also transport options. Although modern transfer stations usually include some provisions for handling recyclables, solid waste transfer dominates the operation of most facilities. Some communities have begun experimenting with transferring commingled, source-separated recyclables to regional processing centers. Transfer facilities can be as simple as a pavement slab and a front-end loader. Alternatively, transfer stations can cost millions of dollars and move thousands of tons of waste each day.

  8. Effective Load Management for the City of College Station 

    E-Print Network [OSTI]

    Hecox, O. D.; Bauer, V.

    1985-01-01

    A successful electrical demand management program for the City of College Station in 1984 employed techniques proven in the industrial and commercial sectors that have seldom been used at the community level. The program, with technical assistance...

  9. Determination of station blackout frequency-duration relationships

    SciTech Connect (OSTI)

    Griggs, D.P.; Riggs, B.K.; Balakrishna, S.

    1986-01-01

    Station blackout is the loss of all alternating current (ac) power to the essential and nonessential electrical buses in a nuclear power plant. This generally involves the loss of redundant off-site power sources and the failure of two or more emergency diesel generators (EDGs). The US Nuclear Regulatory Commission (NRC) has proposed requiring all commercial reactors to have the capability of coping with a station blackout of a specified duration. The NRC has also proposed 4 or 8 h as acceptable durations, depending on plant susceptibility to the occurrence of station blackout events. Analyses were performed to determine expected station blackout frequencies representative of a majority of domestic nuclear power plants. A methodology based on that developed by the NRC was used. Representative industry data for loss of off-site power (LOOP) events and EDG reliability were used in the analyses.

  10. Field Stations Compliance CommitteesAdministrative Units Research Units

    E-Print Network [OSTI]

    Alvarez-Cohen, Lisa

    of the Environment Berkeley Nanosciences & Nanoengineering Institute California Institute for Energy for the Study of Sexual Culture Center for Tebtunis Papyri Energy Biosciences Institute (EBI) Field Station & Social Research Institute of Slavic, East European, and Eurasian Studies Institute of Transportation

  11. (Survey of three isolated diesel power stations in Guatemala)

    SciTech Connect (OSTI)

    Chronowski, R.A.

    1990-03-15

    I traveled to Guatemala City, Guatemala to participate with a team of specialists to study the operating, administrative, and management efficiency of isolated diesel power plants, operated by Instituto Nacional de Electrificacion (INDE). The study is part of a global initiative managed jointly by the Agency for International Development and the World Bank. The power plants were audited, including INDE's largest isolated diesel station, and two much smaller municipal and privately owned stations. I returned to the USA on February 20, 1990.

  12. 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

    2015-01-01

    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.

  13. Non-thermal emission from extragalactic radio sources: a high resolution broad band (radio to X-rays) approach

    E-Print Network [OSTI]

    Gianfranco Brunetti

    2002-07-31

    In the framework of the study of extragalactic radio sources, we will focus on the importance of the spatial resolution at different wavelengths, and of the combination of observations at different frequency bands. In particular, a substantial step forward in this field is now provided by the new generation X-ray telescopes which are able to image radio sources in between 0.1--10 keV with a spatial resolution comparable with that of the radio telescopes (VLA) and of the optical telescopes. After a brief description of some basic aspects of acceleration mechanisms and of the radiative processes at work in the extragalactic radio sources, we will focus on a number of recent radio, optical and X-ray observations with arcsec resolution, and discuss the deriving constraints on the physics of these sources.

  14. Southwest Region Experiment Station - Final Technical Report

    SciTech Connect (OSTI)

    Rosenthal, A

    2011-08-19

    Southwest Technology Development Institute (SWTDI), an independent, university-based research institute, has been the operator of the Southwest Region Photovoltaic Experiment Station (SWRES) for almost 30 years. The overarching mission of SWTDI is to position PV systems and solar technologies to become cost-effective, major sources of energy for the United States. Embedded in SWTDI's general mission has been the more-focused mission of the SWRES: to provide value added technical support to the DOE Solar Energy Technologies Program (SETP) to effectively and efficiently meet the R&D needs and targets specified in the SETP Multi-Year Technical Plan. : The DOE/SETP goals of growing U.S. PV manufacturing into giga-watt capacities and seeing tera-watt-hours of solar energy production in the U.S. require an infrastructure that is under development. The staff of the SWRES has supported DOE/SETP through a coherent, integrated program to address infrastructural needs inhibiting wide-scale PV deployment in three major technical categories: specialized engineering services, workforce development, and deployment facilitation. The SWRES contract underwent three major revisions during its five year period-of- performance, but all tasks and deliverables fell within the following task areas: Task 1: PV Systems Assistance Center 1. Develop a Comprehensive multi-year plan 2. Provide technical workforce development materials and workshops for PV stakeholder groups including university, professional installers, inspectors, state energy offices, Federal agencies 3. Serve on the NABCEP exam committee 4. Provide on-demand technical PV system design reviews for U.S. PV stakeholders 5. Provide PV system field testing and instrumentation, technical outreach (including extensive support for the DOE Market Transformation program) Task 2: Design-for-Manufacture PV Systems 1. Develop and install 18 kW parking carport (cost share) and PV-thermal carport (Albuquerque) deriving and publishing lessons learned Task 3: PV Codes and Standards 1. Serve as the national lead for development and preparation of all proposals (related to PV) to the National Electrical Code 2. Participate in the Standards Technical Panels for modules (UL1703) and inverters (UL1741) Task 4: Assess Inverter Long Term Reliability 1. Install and monitor identical inverters at SWRES and SERES 2. Operate and monitor all inverters for 5 years, characterizing all failures and performance trends Task 5: Test and Evaluation Support for Solar America Initiative 1. Provide test and evaluation services to the National Laboratories for stage gate and progress measurements of SAI TPP winners

  15. The Radio Luminosity Function of the NEP Distant Cluster Radio Galaxies

    E-Print Network [OSTI]

    M. Branchesi; I. M. Gioia; C. Fanti; R. Fanti; R. Perley

    2005-09-06

    A complete sample of 18 X-ray selected clusters of galaxies belonging to the ROSAT North Ecliptic Pole (NEP) survey has been observed with the Very Large Array at 1.4 GHz. These are the most distant clusters in the X-ray survey with redshift in the range 0.3 =0.17 mJy/beam, except for three sources, belonging to the same cluster, which have a higher peak brightness limit of 0.26 mJy/beam. The NEP field source counts are in good agreement with the source counts of a comparison survey, the VLA-VIRMOS deep field survey, indicating that the NEP sample is statistically complete. Thirty-two out of the 79 sources are within 0.2 Abell radii, twenty-two of them are considered cluster members based on spectroscopic redshifts or their optical magnitude and morphological classification. The cluster radio galaxies are used to construct the Radio Luminosity Function (RLF) of distant X-ray selected clusters. A comparison with two nearby cluster RLFs shows that the NEP RLF lies above the local ones, has a steeper slope at low radio powers (<= 10^(24) W/Hz) and shows no evidence for a break at about 6 X 10^(24) W/Hz which is observed in the nearby cluster RLFs. We discuss briefly the origin and possible explanations of the differences observed in the radio properties of nearby and distant clusters of galaxies. The main result of this study is that the RLF of the distant X-ray clusters is very different from that of the local rich Abell clusters.

  16. Drift Wave Model of Rotating Radio Transients

    E-Print Network [OSTI]

    D. Lomiashvili; G. Machabeli; I. Malov

    2007-09-13

    During the last few years there were discovered and deeply examined several transient neutron stars (Rotating Radio Transients). It is already well accepted that these objects are rotating neutron stars. But their extraordinary features (burst-like behavior) made necessary revision of well accepted models of pulsar interior structure. Nowadays most popular model for RRATs is precessing pulsar model, which is the subject of big discussion. We assume that these objects are pulsars with specific spin parameters. An important feature of our model, naturally explaining most of the properties of these neutron stars, is presence of very low frequency, nearly transverse drift waves propagating across the magnetic field and encircling the open field lines region of the pulsar magnetosphere.

  17. Gravitation Wave Emission from Radio Pulsars Revisited

    E-Print Network [OSTI]

    T. Regimbau; J. A. de Freitas Pacheco

    2000-05-02

    We report a new pulsar population synthesis based on Monte Carlo techniques, aiming to estimate the contribution of galactic radio pulsars to the continuous gravitational wave emission. Assuming that the rotation periods of pulsars at birth have a Gaussian distribution, we find that the average initial period is 290 ms. The number of objects with periods equal to or less than 0.4 s, and therefore capable of being detected by an interferometric gravitational antenna like VIRGO, is of the order of 5100-7800. With integration times lasting between 2 and 3 yr, our simulations suggest that about two detections should be possible, if the mean equatorial ellipticity of the pulsars is $\\epsilon$ =10$^{-6}$. A mean ellipticity an order of magnitude higher increases the expected number of detections to 12-18, whereas for $\\epsilon < 10^{-6}$, no detections are expected

  18. Neutral hydrogen absorption towards Fast Radio Bursts

    E-Print Network [OSTI]

    Fender, Rob

    2015-01-01

    If Fast Radio Bursts (FRBs) are truly at astronomical, in particular cosmological, distances, they represent one of the most exciting discoveries in astrophysics of the past decade. However, the distance to FRBs has, to date, been estimated purely from their excess dispersion, and has not been corroborated by any independent means. In this paper we discuss the possibility of detecting neutral hydrogen absorption against FRBs both from spiral arms within our own galaxy, or from intervening extragalactic HI clouds. In either case a firm lower limit on the distance to the FRB would be established. Absorption against galactic spiral arms may already be detectable for bright low-latitude bursts with existing facilities, and should certainly be so by the Square Kilometre Array (SKA). Absorption against extragalactic HI clouds, which would confirm the cosmological distances of FRBs, should also be detectable with the SKA, and maybe also Arecibo. Quantitatively, we estimate that SKA1-MID should be able to detect extr...

  19. Axion Stars and Fast Radio Bursts

    E-Print Network [OSTI]

    A. Iwazaki

    2014-10-23

    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.

  20. Radio Triggered Star Formation in Cooling Flows

    E-Print Network [OSTI]

    B. R. McNamara

    1999-11-08

    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.

  1. An improved integrally formed radio frequency quadrupole

    DOE Patents [OSTI]

    Abbott, S.R.

    1987-10-05

    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.

  2. An Intelligent Solar Powered Battery Buffered EV Charging Station with Solar Electricity Forecasting and EV Charging Load Projection Functions

    E-Print Network [OSTI]

    Zhao, Hengbing; Burke, Andrew

    2014-01-01

    eliminate the charging station peak power demand for EVcan lower the station’s peak power demand and reduce thefor a workplace charging station, solar PV power cannot be

  3. On the Nature of Pulsar Radio Emission

    E-Print Network [OSTI]

    Maxim Lyutikov; Roger D. Blandford; George Machabeli

    1998-06-27

    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. Old stellar populations in distant radio galaxies

    E-Print Network [OSTI]

    James Dunlop

    1998-01-13

    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.

  5. The Tunka Radio Extension (Tunka-Rex): Radio Measurements of Cosmic Rays in Siberia (PISA 2015)

    E-Print Network [OSTI]

    Schröder, F G; Budnev, N M; Gress, O A; Haungs, A; Hiller, R; Huege, T; Kazarina, Y; Kleifges, M; Konstantinov, E N; Korosteleva, E E; Kostunin, D; Krömer, O; Kuzmichev, L A; Lubsandorzhiev, N; Mirgazov, R R; Monkhoev, R; Pakhorukov, A; Pankov, L; Prosin, V V; Rubtsov, G I; Wischnewski, R; Zagorodnikov, A

    2015-01-01

    The Tunka observatory is located close to Lake Baikal in Siberia, Russia. Its main detector, Tunka-133, is an array of photomultipliers measuring Cherenkov light of air showers initiated by cosmic rays in the energy range of approximately $10^{16}-10^{18}\\,$eV. In the last years, several extensions have been built at the Tunka site, e.g., a scintillator array named Tunka-Grande, a sophisticated air-Cherenkov-detector prototype named HiSCORE, and the radio extension Tunka-Rex. Tunka-Rex started operation in October 2012 and currently features 44 antennas distributed over an area of about $3\\,$km$^2$, which measure the radio emission of the same air showers detected by Tunka-133 and Tunka-Grande. Tunka-Rex is a technological demonstrator that the radio technique can provide an economic extension of existing air-shower arrays. The main scientific goal is the cross-calibration with the air-Cherenkov measurements. By this cross-calibration, the precision for the reconstruction of the energy and mass of the primary...

  6. Unusual Solar Radio Burst Observed at Decameter Wavelengths

    E-Print Network [OSTI]

    Melnik, V N; Konovalenko, A A; Rucker, H O; Frantsuzenko, A V; Dorovskyy, V V; Panchenko, M; Stanislavskyy, A A

    2015-01-01

    An unusual solar burst was observed simultaneously by two decameter radio telescopes UTR-2 (Kharkov, Ukraine) and URAN-2 (Poltava, Ukraine) on 3 June 2011 in the frequency range 16-28 MHz. The observed radio burst has some unusual properties, which are not typical for the other types of solar radio bursts. The frequency drift rate of it was positive (about 500 kHz s$^{-1}$) at frequencies higher than 22 MHz and negative (100 kHz s$^{-1}$) at lower frequencies. The full duration of this event varies from 50 s up to 80 s, depending on the frequency. The maximum radio flux of the unusual burst reaches $\\approx 10^3$ s.f.u and its polarization does not exceed 10%. This burst has a fine frequency-time structure of unusual appearance. It consists of stripes with the frequency bandwidth 300-400 kHz. We consider that several accompanied radio and optical events observed by SOHO and STEREO spacecraft are possibly associated with the reported radio burst. A model that may interpret the observed unusual solar radio burs...

  7. 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

    2007-02-20

    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 (<0.15") of these radio sources to be optically resolved for the first time. Through comparison with existing radio maps we have seen consistency in the 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.

  8. The Complex North Transition Region of Centaurus A: Radio Structure

    E-Print Network [OSTI]

    Neff, Susan G; Owen, Frazer N

    2015-01-01

    We present deep radio images of the inner 50 kpc of Centaurus A, taken with the Karl G. Jansky Very Large Array (VLA) at 90cm. We focus on the Transition Regions between the inner galaxy - including the active nucleus, inner radio lobes, and star-forming disk - and the outer radio lobes. We detect previously unknown extended emission around the Inner Lobes, including radio emission from the star-forming disk. We find that the radio-loud part of the North Transition Region, known as the North Middle Lobe, is significantly overpressured relative to the surrounding ISM. We see no evidence for a collimated flow from the Active Galactic Nucleus (AGN) through this region. Our images show that the structure identified by Morganti et al. (1999) as a possible large-scale jet appears to be part of a narrow ridge of emission within the broader, diffuse, radio-loud region. This knotty radio ridge is coincident with other striking phenomena: compact X-ray knots, ionized gas filaments, and streams of young stars. Several s...

  9. The Phoenix radio survey: the angular correlation function

    E-Print Network [OSTI]

    A. Georgakakis; B. Mobasher; L. Cram; A. Hopkins; M. Rowan-Robinson

    1999-10-18

    Using the Phoenix radio survey, a homogeneous survey selected at 1.4GHz and covering an area of ~3deg^2, we analyse the clustering of the sub-mJy radio population using angular correlation function analysis. Extensive simulations are carried out to investigate the significance of the estimated angular correlation amplitudes. Our analysis show that for the S_1.4>0.5mJy sub-samples the radio source distribution is anisotropic at the 2$\\sigma$ significance level. Additionally, we estimate upper limits for the angular correlation amplitudes that, despite the large uncertainties, are in good agreement with the amplitude estimates for sources brighter than 1mJy, detected in the FIRST radio survey (Cress {et al.} 1997). Adopting a radio luminosity function and assuming an evolving spatial correlation function of the form \\xi(r)=(r/r_{o})^{-\\gamma} (1+z)^{-(3+\\epsilon)}, with the evolution parametrised by \\epsilon, we find an upper limit for the angular correlation length r_{o}~9h^-1Mpc for S_1.4>0.5mJy and \\gamma=2.1. This agrees well with the value r_{o}~6-8h^-1Mpc estimated from the FIRST radio survey for sources brighter than 1mJy. Additionally, we quantify the characteristics, in terms of areal coverage and limiting flux density, of future deep radio surveys to yield a significant correlation amplitude detection and to explore possible changes of the correlation amplitude with flux density.

  10. High-power radio-frequency attenuation device

    DOE Patents [OSTI]

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

    1981-12-30

    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.

  11. Method and apparatus for radio frequency ceramic sintering

    DOE Patents [OSTI]

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

    1993-11-30

    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.

  12. Method and apparatus for radio frequency ceramic sintering

    DOE Patents [OSTI]

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

    1993-01-01

    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.

  13. Radio emission from Colliding-Wind Binaries: Observations and Models

    E-Print Network [OSTI]

    S. M. Dougherty; J. M. Pittard; E. P. O'Connor

    2005-10-18

    We have developed radiative transfer models of the radio emission from colliding-wind binaries (CWB) based on a hydrodynamical treatment of the wind-collision region (WCR). The archetype of CWB systems is the 7.9-yr period binary WR140, which exhibits dramatic variations at radio wavelengths. High-resolution radio observations of WR140 permit a determination of several system parameters, particularly orbit inclination and distance, that are essential for any models of this system. A model fit to data at orbital phase 0.9 is shown, and some short comings of our model described.

  14. 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

    2015-01-01

    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...

  15. Radio-Loud and Radio-Quiet Gamma-Ray Pulsars from the Galactic Plane and the Gould Belt

    SciTech Connect (OSTI)

    Gonthier, P. L.

    2005-03-17

    We present recent results of a pulsar population synthesis study in the polar cap model that includes the Parkes Multibeam Pulsar Survey, realistic beam geometries for radio and {gamma}-ray emission from neutron stars born in the Galactic disc as well as the local Gould Belt. We include nine radio surveys to normalize the simulated results from the Galactic disc to the number of radio pulsars observed by the group of selected surveys. In normalizing the contribution of the Gould Belt, we use results from a recent study that indicates a supernova rate in the Gould Belt of 3 to 5 times that of the local region of the Galactic plane leading to {approx}100 neutron stars born in the Gould Belt during the last 5 Myr. Our simulations include the dynamical evolution of the Gould Belt where neutron stars are produced in the plane of the Gould Belt during the past 5 Myr. We discuss the simulated numbers of radio-quiet (those below flux threshold of radio surveys) and radio-loud, {gamma}-ray pulsars from the Galactic disc and the Gould belt observed by {gamma}-ray telescopes EGRET, AGILE and GLAST. They suggest that about 35 of the unidentified EGRET sources could be (mostly radio-loud) {gamma}-ray pulsars with 2/3 of them born in the Galactic disc and 1/3 in the Gould Belt.

  16. ARM: Broadband Radiometer Station (BRS) broadband shortwave and longwave 1-min radiation data with Dutton correction

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

    Laura Riihimaki

    1993-09-01

    Broadband Radiometer Station (BRS) broadband shortwave and longwave 1-min radiation data with Dutton correction

  17. Power-Optimal Scheduling for a Green Base Station with Delay Constraints

    E-Print Network [OSTI]

    Sharma, Vinod

    Power-Optimal Scheduling for a Green Base Station with Delay Constraints Anusha Lalitha, Santanu with average delay constraint on the downlink of a Green Base- station. A Green Base-station is powered by both Terms--Power-optimal, Green Base station, Delay con- straint, multi-user. I. INTRODUCTION The main

  18. Planning and Installation Guide: North Carolina Compressed Natural Gas Fueling Stations

    E-Print Network [OSTI]

    Introduction Are you considering installing a compressed natural gas (CNG) fueling station for your fleet of important items to consider when planning for a CNG station. Natural gas infrastructure, which is commonly - Others interested in installing a natural gas fueling station CNG fueling station under construction

  19. ARM: Broadband Radiometer Station (BRS) broadband shortwave and longwave 1-min radiation data with Dutton correction

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

    Laura Riihimaki

    Broadband Radiometer Station (BRS) broadband shortwave and longwave 1-min radiation data with Dutton correction

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

    E-Print Network [OSTI]

    Terwilliger, K M

    1957-01-01

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

  1. Radio Wave Propagation in Metal Train Compartments MSc thesis in Embedded Systems

    E-Print Network [OSTI]

    Langendoen, Koen

    #12;#12;Radio Wave Propagation in Metal Train Compartments MSc thesis in Embedded Systems Faculty Yaowen Khee January 12, 2009 #12;#12;Author Yaowen Khee yb.khee@gmail.com Title Radio Wave Propagation of multiple nodes, each with the ability to communicate using radio waves. The characteristics of the radio

  2. On the antenna calibration of space radio instruments using the galactic background: General formulas

    E-Print Network [OSTI]

    California at Berkeley, University of

    and application to STEREO/WAVES, Radio Sci., 46, RS2008, doi:10.1029/2010RS004464. 1. Introduction [2] Radio apply these rela- tions to the antenna calibration of the STEREO/WAVES (S/WAVES) radio instrumentOn the antenna calibration of space radio instruments using the galactic background: General

  3. Exploiting Radio Irregularity in the Internet of Things for Automated People Counting

    E-Print Network [OSTI]

    T, suffers from radio irregularity ­ a phenomenon referring to radio waves being selectively absorbedExploiting Radio Irregularity in the Internet of Things for Automated People Counting Wei-chuan Lin. Radio irregularity is often regarded as a problem in wireless communications but, with the envisioned

  4. Ulysses Radio and Plasma Wave Observations at High Southern Heliographic Latitudes

    E-Print Network [OSTI]

    California at Berkeley, University of

    Ulysses Radio and Plasma Wave Observations at High Southern Heliographic Latitudes R. G. Stone, R-Frey, R. Manning, M. J. Reiner, J. L. Steinberg, G. Thejappa Ulysses spacecraft radio and plasma wave wind. Radio and plasma wave observations, such as those made by the Unified Radio and Plasma Wave

  5. 30TH INTERNATIONAL COSMIC RAY CONFERENCE Radio Detection of UltraHigh Energy Cosmic Rays

    E-Print Network [OSTI]

    Falcke, Heino

    offers a number of interesting advantages. Since radio waves suffer no attenuation, radio measurements30TH INTERNATIONAL COSMIC RAY CONFERENCE Radio Detection of Ultra­High Energy Cosmic Rays HEINO: The radio technique for the detection of cosmic particles has seen a major revival in recent years. New

  6. Intrinsic advantages of the w component and spherical imaging for wide-field radio interferometry

    E-Print Network [OSTI]

    McEwen, Jason

    . Next-generation radio interferometers, such as the Square Kilometre Array1 (SKA) [1], will inherently

  7. 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

  8. THE JETS IN FRII RADIO GALAXIES WITH Z ! 0:3 MARTIN HARDCASTLE

    E-Print Network [OSTI]

    Hardcastle, Martin

    THE JETS IN FRII RADIO GALAXIES WITH Z ! 0:3 MARTIN HARDCASTLE Mullard Radio Astronomy Observatory, Cavendish Laboratory, Madingley Road, Cambridge CB3 OHE, UK 1. Introduction If we believe that jets trace radio galaxy with compact hot spots. Until recently the detection rate of jets in FRII radio galaxies

  9. EXAMINING THE RADIO-LOUD/RADIO-QUIET DICHOTOMY WITH NEW CHANDRA AND VLA OBSERVATIONS OF 13 UGC GALAXIES

    SciTech Connect (OSTI)

    Kharb, P.; Axon, D. J.; Robinson, A.; Capetti, A.; Balmaverde, B.; Chiaberge, M.; Macchetto, D.; Grandi, P.; Giovannini, G.; Montez, R.

    2012-04-15

    We present the results from new {approx}15 ks Chandra-ACIS and 4.9 GHz Very Large Array (VLA) observations of 13 galaxies hosting low-luminosity active galactic nuclei (AGNs). This completes the multiwavelength study of a sample of 51 nearby early-type galaxies described in Capetti and Balmaverde and Balmaverde and Capetti. The aim of the three previous papers was to explore the connection between the host galaxies and AGN activity in a radio-selected sample. We detect nuclear X-ray emission in eight sources and radio emission in all but one (viz., UGC 6985). The new VLA observations improve the spatial resolution by a factor of 10: the presence of nuclear radio sources in 12 of the 13 galaxies confirms their AGN nature. As previously indicated, the behavior of the X-ray and radio emission in these sources depends strongly on the form of their optical surface brightness profiles derived from Hubble Space Telescope imaging, i.e., on their classification as 'core', 'power-law', or 'intermediate' galaxies. With more than twice the number of 'power-law' and 'intermediate' galaxies compared to previous work, we confirm with a much higher statistical significance that these galaxies lie well above the radio-X-ray correlation established in Fanaroff-Riley type I radio galaxies and the low-luminosity 'core' galaxies. This result highlights the fact that the 'radio-loud/radio-quiet' dichotomy is a function of the host galaxy's optical surface brightness profile. We present radio-optical-X-ray spectral indices for all 51 sample galaxies. Survival statistics point to significant differences in the radio-to-optical and radio-to-X-ray spectral indices between the 'core' and 'power-law galaxies (Gehan's Generalized Wilcoxon test probability p for the two classes being statistically similar is <10{sup -5}), but not in the optical-to-X-ray spectral indices (p = 0.25). Therefore, the primary difference between the 'core' and 'power-law' galaxies is in their ability to launch powerful radio outflows. This result is consistent with the hypothesis of different formation processes and evolution histories in 'core' and 'power-law' galaxies: major mergers are likely to have created 'core' galaxies, while minor mergers were instrumental in the creation of 'power-law' galaxies.

  10. Loss of pressurizer water level during station blackout

    SciTech Connect (OSTI)

    Griggs, D.P.; Riggs, B.K.

    1986-01-01

    Station blackout is the loss of all alternating current (ac) power to both the essential and nonessential electrical buses in a nuclear power plant. The US Nuclear Regulatory Commission (NRC) has proposed a requirement that all plants be capable of maintaining adequate core cooling during station blackout events lasting a specified duration. The NRC has also suggested acceptable specified durations of four or eight hours, depending on individual plant susceptibility to blackout events. In a pressurized water reactor (PWR), the occurrence of a station blackout event results in the functional loss of many plant components, including main feedwater, reactor coolant pumps, the emergency core cooling system, and pressurizer heaters and spray. Nevertheless, PWRs have the capability of removing decay heat for some period of time using steam-driven auxiliary feedwater pumps and the natural-circulation capability of the primary system. The purpose of this investigation is to determine the early response of a PWR to station blackout conditions. In particular, the effect of primary coolant shrinkage and inventory loss on pressurizer level is examined to gain insight into the operational and analytical issues associated with the proposed station blackout coping requirement.

  11. ATLAS: Deep Radio Observations of Six Square Degrees

    E-Print Network [OSTI]

    Ray P. Norris; Enno Middelberg; Brian J. Boyle

    2007-01-12

    We are using the Australia Telescope Compact Array to image about six square degrees surrounding the Chandra Deep Field South and European Large Area ISO Survey - South 1 regions, with the aim of producing the widest deep radio survey ever attempted, in fields with deep optical, infrared, and X-ray data. Our goal is to penetrate the heavy dust extinction which is found in active galaxies at all redshifts, and study the star formation activity and active galactic nuclei buried within. Although we are only about half-way through the survey, our data are proving remarkably fruitful. For example, we have discovered a new and unexpected class of object (the Infrared-Faint Radio Sources), we have found that the radio-FIR correlation extends to low flux densities, and we havefound powerful AGN-like radio objects in galaxies with a star-forming SED.

  12. Multiobjective optimization of a radio telescope array with site constraints

    E-Print Network [OSTI]

    Cohanim, Babak, 1980-

    2004-01-01

    The next generation of radio telescope interferometric arrays requires careful design of the array configuration to optimize the performance and minimize the cost of the overall system while adhering to site constraints. ...

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

    E-Print Network [OSTI]

    Cassett, David Ian, 1971-

    2004-01-01

    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 ...

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

    E-Print Network [OSTI]

    Banaei, Armin

    2014-04-25

    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 ...

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

    E-Print Network [OSTI]

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

    2010-01-01

    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 ...

  16. Operator and radio resource sharing in multi-carrier environments

    E-Print Network [OSTI]

    Teeraparpwong, Pongsakorn

    2009-01-01

    a Radio Network System (RNS). RNSs are interconnected toBSC MS BTS CM SM RB UI PS-CN RNS Internet UE UI UE Node B CMavailable bandwidth at each RNS/BSS and donating available

  17. Cognitive Radio Network as Wireless Sensor Network (II): Security Consideration

    E-Print Network [OSTI]

    Qiu, Robert Caiming

    Radio Institute, Department of Electrical and Computer Engineering, Center for Manufacturing Research [2], in which a mali- cious CR node can inject false information on the spectrum en- vironment

  18. Adventures in Radio Astronomy Instrumentation and Signal Processing

    E-Print Network [OSTI]

    Masci, Frank

    Adventures in Radio Astronomy Instrumentation and Signal Processing by Peter Leonard Mc Alan Langman, Karoo Array Telescope 1 Center for Astronomy Signal Processing and Electronics Research and implementation of several instruments for digi- tizing and processing analogue astronomical signals collected

  19. Performance Analysis of Dispersed Spectrum Cognitive Radio Systems 

    E-Print Network [OSTI]

    Mohammad, Muneer

    2011-02-22

    Dispersed spectrum cognitive radio systems represent a promising approach to exploit the utilization of spectral resources to full extent. Therefore, the performance analysis of such systems is conducted in this research. The Average symbol error...

  20. Radio Resource Management for Green Wireless Networks Cristina Comaniciu

    E-Print Network [OSTI]

    Mandayam, Narayan

    energy sources (e.g. solar cells and wind turbines). Although research on the design of green radio battery power for mobile terminals and wireless sensors. Because of the focus on mobile terminals

  1. Radio-frequency spectroscopy of ultracold atomic Fermi gases

    E-Print Network [OSTI]

    Schirotzek, Andre

    2010-01-01

    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 ...

  2. Search for Axion Radio Broadcasts from the Galaxy | Argonne National...

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

    Search for Axion Radio Broadcasts from the Galaxy November 23, 2015 3:30PM to 4:30PM Presenter Aaron Chou, Fermilab Location Building 203, Room R150 Type Seminar Abstract:...

  3. Radio-frequency probes of Antarctic ice at South Pole

    E-Print Network [OSTI]

    Besson, David Zeke; Kravchenko, I.

    2013-05-16

    consistent with measurements in East Antarctica. Combined with other radio echo sounding data, we conclude that observed birefringent asymmetries at South Pole are generated entirely in the lower half of the ice sheet. By contrast, birefringent asymmetries...

  4. Observational tests of hurricane intensity estimations using GPS radio occultations

    E-Print Network [OSTI]

    Vergados, Panagiotis

    This study presents a novel approach to estimating the intensity of hurricanes using temperature profiles from Global Positioning System radio occultation (GPSRO) measurements. Previous research has shown that the temperature ...

  5. MEASURING THE JET POWER OF FLAT-SPECTRUM RADIO QUASARS

    SciTech Connect (OSTI)

    Shabala, S. S.; Santoso, J. S.; Godfrey, L. E. H.

    2012-09-10

    We use frequency-dependent position shifts of flat-spectrum radio cores to estimate the kinetic power of active galactic nucleus (AGN) jets. We find a correlation between the derived jet powers and AGN narrow-line luminosity, consistent with the well-known relation for radio galaxies and steep spectrum quasars. This technique can be applied to intrinsically weak jets even at high redshift.

  6. Intranight optical variability of radio-quiet and radio lobe dominated quasars

    E-Print Network [OSTI]

    C. S. Stalin; Gopal-Krishna; Ram Sagar; Paul J. Wiita

    2003-06-19

    We present results of a programme of multi-epoch, intra-night optical monitoring of a sample of non-blazar type AGN, which includes seven radio-quiet QSOs (RQQs) and an equal number of radio-loud, lobe-dominated quasars (LDQs), covering a redshift range from about 0.2 to 2.0. These two sets of optically bright and intrinsically luminous QSOs are well matched in the redshift-optical luminosity ($z - M_B$) plane. Our CCD monitoring covered a total of 61 nights with an average of 6.1 hours of densely sampled monitoring of just a single QSO per night, thereby achieving a typical detection threshold of $\\sim 1$% variation over the night. Unambiguous detection of intra-night variability(INOV) amplitudes in the range 1$-$3% on day-like or shorter time scales were thus made for both RQQs and LDQs. Based on these clear detections of INOV, we estimate duty cycles of 17% and 9% for RQQs and LDQs, respectively; inclusion of the two cases of probable variations of LDQs would raise the duty cycle to 15% for LDQs. The similarity in the duty cycle and amplitude of INOV for the RQQs and LDQs suggests, firstly, that the radio loudness alone does not guarantee an enhanced INOV in QSOs and,secondly, that as in LDQs, relativistic jets may also be present in RQQs. We argue that, as compared to BL Lacs, the conspicuously milder, rarer and possibly slower INOV of RQQs and LDQs, can in fact be readily understood in terms of their having optical synchrotron jets which are modestly misaligned from us,but are otherwise intrinsically as relativistic and active as the jets in BL Lacs.

  7. Fourier phase analysis in radio-interferometry

    E-Print Network [OSTI]

    Francois Levrier; Edith Falgarone; Francois Viallefond

    2006-06-09

    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.

  8. Radio wave emissions due to gravitational radiation

    E-Print Network [OSTI]

    Mattias Marklund; Gert Brodin; Peter Dunsby

    2000-02-29

    We consider the interaction of a weak gravitational wave with electromagnetic fields in a thin plasma on a Minkowski background spacetime using the 1+3 orthonormal frame formalism. Because gravitational and electromagnetic waves satisfy the same dispersion relation, electromagnetic waves can be effectively generated as a result of this interaction. In the case of the interaction with a static magnetic field, the amplitude of the electromagnetic waves depends on the size of the excitation region in which the magnetic field is contained. It is argued that due to the presence of a plasma this process can also lead to the generation of higher harmonics of the original mode. Estimates are given for this effect in the case of a binary pulsar and a cold electron plasma. It is found that the emmited radiation will lie in the radio frequency band. We also speculate on the possible relevance of this process on situations in cosmology, in particular whether this could be used to constrain primordial magnetic fields.

  9. Trirotron: triode rotating beam radio frequency amplifier

    DOE Patents [OSTI]

    Lebacqz, Jean V. (Stanford, CA)

    1980-01-01

    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.

  10. 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

    2015-01-01

    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...

  11. 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

    2009-08-07

    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.

  12. Radio faint AGN: a tale of two populations

    E-Print Network [OSTI]

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

    2015-01-01

    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...

  13. Locating PHEV Exchange Stations in V2G

    E-Print Network [OSTI]

    Pan, Feng; Berscheid, Alan; Izraelevitz, David

    2010-01-01

    Plug-in hybrid electric vehicles (PHEVs) are an environmentally friendly technology that is expected to rapidly penetrate the transportation system. Renewable energy sources such as wind and solar have received considerable attention as clean power options for future generation expansion. However, these sources are intermittent and increase the uncertainty in the ability to generate power. The deployment of PHEVs in a vehicle-to-grid (V2G) system provide a potential mechanism for reducing the variability of renewable energy sources. For example, PHEV supporting infrastructures like battery exchange stations that provide battery service to PHEV customers could be used as storage devices to stabilize the grid when renewable energy production is fluctuating. In this paper, we study how to best site these stations in terms of how they can support both the transportation system and the power grid. To model this problem we develop a two-stage stochastic program to optimally locate the stations prior to the realizat...

  14. 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

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

    SciTech Connect (OSTI)

    Norris, Ray P.; Mao, Minnie; Afonso, Jose; Cava, Antonio; Farrah, Duncan; Oliver, Seb; Huynh, Minh T.; Mauduit, Jean-Christophe; Surace, Jason; Ivison, R. J.; Jarvis, Matt; Lacy, Mark; Maraston, Claudia; Middelberg, Enno; Seymour, Nick

    2011-07-20

    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.

  16. EIS-0210: Tampa Electric Company-Polk Power Station (Adopted)

    Broader source: Energy.gov [DOE]

    The U.S. Environmental Protection Agency prepared this statement to fulfill its National Environmental Policy Act requirements with respect to the potential issuance of a permit to the Tampa Electric Company under the National Pollutant Discharge Elimination System for the 1,150-MW Polk Power Station, a new pollutant source. The U.S. Department of Energy served as a cooperating agency in the development of this document due to its potential role to provide cost-shared financial assistance for a 260-MW Integrated Gasification Combined Cycle unit at the Power Station under its Clean Coal Technology Demonstration Project, and adopted the document by August 1994.

  17. Design of photovoltaic central power station concentrator array

    SciTech Connect (OSTI)

    Not Available

    1984-02-01

    A design for a photovoltaic central power station using tracking concentrators has been developed. The 100 MW plant is assumed to be located adjacent to the Saguaro Power Station of Arizona Public Service. The design assumes an advanced Martin Marietta two-axis tracking fresnel lens concentrator. The concentrators are arrayed in 5 MW subfields, each with its own power conditioning unit. The photovoltaic plant output is connected to the existing 115 kV switchyard. The site specific design allows detailed cost estimates for engineering, site preparation, and installation. Collector and power conditioning costs have been treated parametrically.

  18. Presented at "RFI2004: Workshop on Mitigation of Radio Frequency Interference in Radio Astronomy"; Penticton, Canada, 16-18 July 2004

    E-Print Network [OSTI]

    Ellingson, Steven W.

    of the large financial investment foreseen in the Square Kilometre Array (SKA) radio telescope, it will need

  19. Restarting radio activity and dust emission in radio-loud broad absorption line quasars

    E-Print Network [OSTI]

    Bruni, G; Montenegro-Montes, F M; Brienza, M; González-Serrano, J I

    2015-01-01

    Broad absorption line quasars (BAL QSOs) are objects showing absorption from relativistic outflows, with velocities up to 0.2c. These manifest, in about 15% of quasars, as absorption troughs on the blue side of UV emission lines, such as C iv and Mg ii. In this work, we complement the information collected in the cm band for our previously presented sample of radio loud BAL QSOs with new observations at m and mm bands. Our aim is to verify the presence of old, extended radio components in the MHz range, and probe the emission of dust (linked to star formation) in the mm domain. We observed 5 sources from our sample, already presenting hints of low-frequency emission, with the GMRT at 235 and 610 MHz. Other 17 sources (more than half the sample) were observed with bolometer cameras at IRAM-30m and APEX. All sources observed with the GMRT present extended emission at a scale of tens of kpc. In some cases these measurements allow us to identify a second component in the SED, at frequencies below 1.4 GHz, beyond ...

  20. The Radio Luminosity Function of the NEP Distant Cluster Radio Galaxies

    E-Print Network [OSTI]

    Branchesi, M; Fanti, C; Fanti, R; Perley, R

    2005-01-01

    A complete sample of 18 X-ray selected clusters of galaxies belonging to the ROSAT North Ecliptic Pole (NEP) survey has been observed with the Very Large Array at 1.4 GHz. These are the most distant clusters in the X-ray survey with redshift in the range 0.3 =0.17 mJy/beam, except for three sources, belonging to the same cluster, which have a higher peak brightness limit of 0.26 mJy/beam. The NEP field source counts are in good agreement with the source counts of a comparison survey, the VLA-VIRMOS deep field survey, indicating that the NEP sample is statistically complete. Thirty-two out of the 79 sources are within 0.2 Abell radii, twenty-two of them are considered cluster members based on spectroscopic redshifts or their optical magnitude and morphological classification. The cluster radio galaxies are used to construct the Radio Luminosity Function (RLF) of distant X-ray selected clusters. A comparison with two nearby cluster RLFs shows that the NEP RLF lies above the local ones, has a steeper slope at lo...