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  • Astronomy  (2)
  • Computer Systems  (2)
  • Chromatin/*metabolism  (1)
  • 2000-2004  (5)
  • 1960-1964
  • 2004  (5)
  • 1
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    Molecular biology. Breaking the silence (2004)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2004-01-17
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Owen-Hughes, Tom -- Bruno, Michael -- New York, N.Y. -- Science. 2004 Jan 16;303(5656):324-5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Gene Regulation and Expression, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK. t.a.owenhughes@dundee.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/14726582" target="_blank"〉PubMed〈/a〉
    Keywords: Acetylation ; Acetyltransferases/metabolism ; Adenosine Triphosphatases/genetics/*metabolism ; Adenosine Triphosphate/*metabolism ; Catalysis ; Chromatin/*metabolism ; Chromosomes, Fungal ; Dimerization ; *Gene Expression Regulation, Fungal ; *Gene Silencing ; Genes, Fungal ; Genetic Variation ; Heterochromatin/metabolism ; Histone Acetyltransferases ; Histones/*metabolism ; Mutation ; Nucleosomes/metabolism ; Protein Binding ; Saccharomyces cerevisiae/*genetics/metabolism ; Saccharomyces cerevisiae Proteins/genetics/*metabolism ; Transcription, Genetic
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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    PAPER CURRENT
  • 2
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    A General Overview of the Data Acquisition and Controls Systems (DACS) of the E-Complex at NASA's Stennis Space Center (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The John C. Stennis Space Center (SSC) provides test operations services to a variety of customers, including NASA, DoD, and commercial enterprises for the development of current and next-generation rocket propulsion systems. Many of these testing services are provided in the E-Complex test facilities composed of three active test stands (E1, E2, & E3) and 7 total test positions. Each test position is outfitted with unique sets of data acquisition and controls hardware and software that record both facility and test article data and enable safe operation of the test facility. This paper addresses each system in more detail including efforts to upgrade hardware and software.
    Keywords: Computer Systems
    Type: SSTI-2003-10-00099 , AIAA Paper 2004-2489 , AIAA Aerodynamic Measurement Technology and Ground Testing Conference; Jun 28, 2004 - Jul 01, 2004; Portland, OR; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Multiwavelength Observations of Strong Flares from the TeV Blazar 1ES 1959+650 (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Following the detection of strong TeV gamma ray flares from the BL Lac object 1 ES 1959+650 with the Whipple 10 m Cerenkov telescope on 2002 May 16 and 17, we performed intensive target of opportunity radio, optical, X-ray, and TeV ?ray observations from 2002 May 18 to August 14. Observations with the X-ray telescope RossiX-Ray Timing Explorer and the Whipple and HEGRA gamma-ray telescopes revealed several strong flares, enabling us to sensitively test the X-ray--gamma-ray flux correlation properties. Although the X-ray and gamma-ray fluxes seemed to be correlated in general, we found an orphan gamma-ray flare that was not accompanied by an X-ray flare. While we detected optical flux variability with the Boltwood and Abastumani observatories, the data did not give evidence for a correlation of the optical flux variability with the observed X-ray and 7-ray flares. Within statistical errors of about 0.03 Jy at 14.5 GHz and 0.05 Jy at 4.8 GHz, the radio fluxes measured with the University of Michigan Radio Astronomy Observatory stayed constant throughout the campaign; the mean values agreed well with the values measured on 2002 May 7 and June 7 at 4.9 and 15 GHz with the Very Large Array and at 4.8 GHz with archival flux measurements. After describing in detail the radio, optical, X-ray and gamma-ray light curves, and spectral energy distributions (SEDs), we present initial modeling of the SED with a simple synchrotron self- Compton model. With the addition of another TeV blazar with good broadband data, we consider the set of all TeV blazars, to begin to look for a connection of the jet properties to the properties of the central accreting black hole thought to drive the jet. Remarkably, the temporal and special X-ray and gamma-ray emission characteristics of TeV blazars are very similar, even though the mass estimates of their central black holes differ by up to 1 order of magnitude.
    Keywords: Astronomy
    Type: The Astrophysical Journal; 601; 151-164
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Investigations into Gravitational Wave Emission from Compact Body Inspiral Into Massive Black Holes (2004)
    In:  CASI
    Details
    Publication Date: 2019-08-15
    Description: Much of the grant's support (and associated time) was used in developmental activity, building infrastructure for the core of the work that the grant supports. Though infrastructure development was the bulk of the activity supported this year, important progress was made in research as well. The two most important "infrastructure" items were in computing hardware and personnel. Research activities were primarily focused on improving and extending. Hughes' Teukolsky-equation-based gravitational-wave generator. Several improvements have been incorporated into this generator.
    Keywords: Astronomy
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    GSFC Information Systems Technology Developments Supporting the Vision for Space Exploration (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Vision for Space Exploration will guide NASA's future human and robotic space activities. The broad range of human and robotic missions now being planned will require the development of new system-level capabilities enabled by emerging new technologies. Goddard Space Flight Center is actively supporting the Vision for Space Exploration in a number of program management, engineering and technology areas. This paper provides a brief background on the Vision for Space Exploration and a general overview of potential key Goddard contributions. In particular, this paper focuses on describing relevant GSFC information systems capabilities in architecture development; interoperable command, control and communications; and other applied information systems technology/research activities that are applicable to support the Vision for Space Exploration goals. Current GSFC development efforts and task activities are presented together with future plans.
    Keywords: Computer Systems
    Type: AIAA Space2004; Sep 28, 2004 - Sep 30, 2004; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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