Now showing items 1-20 of 1157

    • 2006 May-July major radio flare episodes in Cygnus X-3: Spectrotiming analysis of the X-ray data 

      Koljonen, Karri I. I.; McCollough, Michael L.; Hannikainen, Diana Carina; Droulans, Robert (2013)
      We analyse in detail the X-ray data of the microquasar Cygnus X-3 obtained during major radio flaring episodes in 2006 with multiple observatories. The analysis consists of two parts: probing the fast (~1min) X-ray spectral ...
    • The 2010 very high energy y-ray flare and 10 years of multi-wavelength observations of M 87 

      Cara, Mihai; Perlman, Eric S.; Abramowski, A.; Acero, F.; Aharonian, F.; Akhperjanian, A. G.; Anton, G.; Balzer, A.; Barnacka, A.; Barres de Almeida, U. (2012-02-02)
      The giant radio galaxy M 87 with its proximity (16 Mpc), famous jet, and very massive black hole ((3 – 6) × 109 M ☉) provides a unique opportunity to investigate the origin of very high energy (VHE; E > 100 GeV) γ-ray ...
    • 2016 Baja Car 

      Al Jaberi, Khalid; Al Katheeri, Mohamed; Al Saleh, Bader; Alblooshi, Saeed; Bonilla, Martin; Salvador, David Cabrera; Faden, Sari; Heeke, Elizabeth; Mo, Jiaqi; Pounder, Andre-Louis; Wang, Bo
      The purpose is to design and build a rolling chassis that is capable of traversing various terrains, which will provide support to the components and make driver feel comfortable and safe to drive.
    • 70 DA white dwarfs identified in LAMOST pilot survey 

      Luo, A.L.; Oswalt, Terry D.; Zhao, J.K.; Zhao, G. (2013-06)
      We present a spectroscopically identified catalog of 70 DA white dwarfs (WDs) from the LAMOST pilot survey. Thirty-five are found to be new identifications after cross-correlation with the Eisenstein et al. and Villanova ...
    • Abundance of elements beyond the iron group in cool do white dwarfs 

      Chayer, Pierre; Vennes, Stéphane; Dupuis, Jean François; Kruk, Jeffrey W. (2005-09-10)
      We report the presence of elements beyond the iron group in the atmospheres of the cool DO white dwarfs HD 149499 B and HZ 21. Photospheric lines of germanium (Z = 32), arsenic (33), selenium (34), tin (50), tellurium (52), ...
    • Abundances and energy spectra of corotating interaction region heavy ions observed during solar cycle 23 

      Mason, Glenn M.; Leske, Richard A.; Desai, Mihir I.; Cohen, Christina M S; Dwyer, Joseph R.; Mazur, Joseph E.; Mewaldt, Richard A.; Gold, Robert E.; Krimigis, Stamatios M. (2008-05-10)
      Using instruments on the ACE spacecraft, we surveyed the heavy-ion spectra and composition over the range He– Fe for 41 corotating interaction regions (CIRs) during 1998–2007. Below~ 1 MeV nucleon^-1 the spectra are power ...
    • Abundances of heavy and ultraheavy ions in ³He-rich solar flares 

      Mason, Glenn M.; Mazur, Joseph E.; Dwyer, Joseph R.; Jokipii, Jack Randy; Gold, Robert E.; Krimigis, Stamatios M. (2004-05-01)
      We have surveyed ³He-rich solar energetic particle (SEP) events over the period 1997 September-2003 April in order to characterize abundances of heavy ions near 400 keV nucleonˉ¹. The first part of the study focuses on 20 ...
    • Acceleration of low-energy ions at parallel shocks with a focused transport model 

      Zuo, Pingbing; Zhang, Ming; Rassoul, Hamid K. (2013-04-10)
      We present a test particle simulation on the injection and acceleration of low-energy suprathermal particles by parallel shocks with a focused transport model. The focused transport equation contains all necessary physics ...
    • Acceleration of suprathermal particles by compressional plasma wave trains in the solar wind 

      Zhang, Ming (2010-12-04)
      This paper presents a calculation of particle acceleration by an idealized compressional plasma wave train. In this model, suprathermal particles, such as pickup ions, are continuously injected into a wave train consisting ...
    • Acceleration of ³He nuclei at interplanetary shocks 

      Desai, Mihir I.; Mason, Glenn M.; Dwyer, Joseph R.; Mazur, Joseph E.; Smith, Charles W.; Skoug, Ruth M. (2001-05-20)
      e have surveyed the 0.5-2.0 MeV nucleonˉ¹ ion composition of 56 interplanetary (IP) shocks observed with the Ultra - Low-Energy Isotope Spectrometer on board the Advanced Composition Explorer from 1997 October 1 through ...
    • Adaptive weighing of context models for lossless data compression 

      Mahoney, Matthew V. (2005-12-21)
      Until recently the state of the art in lossless data compression was prediction by partial match (PPM). A PPM model estimates the next-symbol probability distribution by combining statistics from the longest matching ...
    • Adrenal gland and lung lesions in Gulf of Mexico common bottlenose dolphins (Tursiops truncatus) found dead following the Deepwater Horizon oil spill 

      Fire, Spencer; Venn-Watson, Stephanie K.; Colegrove, Kathleen M.; Kinsel, Michael J.; Litz, Jenny A.; Terio, Karen A.; Saliki, Jeremiah T.; Carmichael, Ruth H.; Chevis, Connie; Hatchett, Wendy (2015-05-20)
      A northern Gulf of Mexico (GoM) cetacean unusual mortality event (UME) involving primarily bottlenose dolphins (Tursiops truncatus) in Louisiana, Mississippi, and Alabama began in February 2010 and continued into 2014. ...
    • The AGILE monitoring of Cygnus X-3: transient gamma-ray emission and spectral constraints 

      Piano, Giovanni; Tavani, Marco; Trois, Alessio; Giuliani, Andrea; Bulgarelli, Andrea; Evangelista, Yuri; Coppi, Paolo S.; Del Monte, Ettore D.; Sabatini, Sabina; Hannikainen, Diana Carina (2012-09-14)
      We present the AGILE-GRID (Astro-rivelatore Gamma a Immagini LEggero – Gamma-Ray Imaging Detector) monitoring of Cygnus X-3, during the period between November 2007 and July 2009. We report here the whole AGILE-GRID ...
    • Air-Ball: the free-flying satellite simulator 

      Byrnes, James; Wang, Jerry; Czap, Andrew; Rivera, Gonzalo; Clark, Casey; McKinnon, William; Savino, Frank
      The project objective is to design, build,and fly a multi-rotor craft that achieves full six degrees of freedom to facilitate research, as well as improve techniques for satellite attitude dynamic and kinematic control.
    • Airline Consumer's Perception of Transport Security Administration’s Prohibited Items 

      D'souza, Clayton Ernest (2014-07)
      There has been limited research conducted and significantly limited scholarly articles on consumer attitudes towards the current TSA prohibited items list. If the research were to be conducted a year after the September ...
    • Aldehyde–alkyne–amine (A3) coupling catalyzed by a highly efficient dicopper complex 

      Chen, Hong-Bin; Zhao, Yan; Liao, Yi (2015-04-13)
      A dicopper(I) complex, CuI 2ðpipÞ 2 (pip ¼ (2-picolyliminomethyl)pyrrole anion), was utilized to catalyze A3 coupling reactions, which led to the formation of propargylamines. Aldehydes, alkynes and amines with a variety ...
    • Algae biodiesel byproduct utilization for economic feasibility 

      Bakley, Troy; Solano, Jennifer; Stewart, Katherine
      Algae derived biodiesel could allow the United States to produce energy domestically and sustainably while utilizing the liquid fuel distribution infrastructure we already have in place. Consistent fluctuations in crude ...
    • An algorithm applicable to clearing combinatorial exchanges 

      Silaghi, Marius-Calin (2002-09-16)
      It is important to approach negotiations in a way that ensures privacy. So far, research has focused on securely solving restricted classes of negotiation techniques, mainly the (M+1)-st-price auctions. Here we show how ...
    • An algorithm for clearing combinatorial markets 

      Nzouonta, Josiane Domgang (2003-12-15)
      It was recently shown possible to solve single item auctions without revealing any secret except for the solution. Namely, with vMB-share [4], the seller and the buyer only learn each other's identity and the selling price ...