Now showing items 1-20 of 1318

    • 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.
    • 2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system? 

      Schüh, Sonja L.; Handler, Gerald; Drechsel, Horst; Hauschildt, Peter H.; Dreizler, Stefan; Medupe, R.; Karl, C. A.; Napiwotzki, Ralf; Kim, Seunglee; Wood, Matt A. (2003-11)
      We report the discovery of a new eclipsing system less than one arcminute south of the pulsating DB white dwarf KUV 05134+2605 . The object could be identified with the point source 2MASS J0516288+260738 published by the ...
    • 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 ...
    • The 72-h WEBT microvariability observation of blazar S5 0716+714 in 2009 

      Bhatta, G.; Webb, James R.; Hollingsworth, H.; Dhalla, S.; Khanuja, A.; Bachev, Rumen S.; Blinov, Dmitry A.; Böttcher, Markus; Bravo Calle, O. J A; Vennes, Stéphane (2013-10-10)
      Context. The international Whole Earth Blazar Telescope (WEBT) consortium planned and carried out three days of intensive micro-variability observations of S5 0716+714 from February 22, 2009 to February 25, 2009. This ...
    • A Robot Platform for Intelligent Ground Vehicle Research 

      Li, Jihang (2016-11)
      This thesis presents a mobile platform developed for further research on the Intellegent Ground Vehicle project which began as a capstone project but without achieving full autonomy. The scope of the current project is ...
    • 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 ...
    • Acquisition of airborne imagery in support of Deepwater Horizon oil spill recovery assessments 

      Bostater, Charles R.; Müller-Karger, Frank Edgar (2012-10-19)
      Remote sensing imagery was collected from a low flying aircraft along the near coastal waters of the Florida Panhandle and northern Gulf of Mexico and into Barataria Bay, Louisiana, USA, during March 2011. Imagery was ...
    • 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. ...
    • AES Encryption Algorithm using ARM TrustZone Technology 

      Lee, Chia-Che (2016-11)
      With the huge impact of IoT devices, the security needs are becoming more important than what it had before. Since embedded systems have limited resources, the traditional security solutions are not quite fitting to IoTs ...
    • 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.
    • Airborne imaging sensors for environmental monitoring & Surveillance In support of oil spills & recovery efforts 

      Bostater, Charles R.; Jones, James W.; Frystacky, Heather; Coppin, Gaelle; Levaux, Florian; Neyt, Xavier (2011-10-04)
      Collection of pushbroom sensor imagery from a mobile platform requires corrections using inertial measurement units (IMU's) and DGPS in order to create useable imagery for environmental monitoring and surveillance of ...