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  • (Rat liver)
  • Instrumentation
  • Nuclear reactions
  • Springer  (11)
  • American Chemical Society
  • American Chemical Society (ACS)
  • Elsevier
  • 1995-1999  (11)
Collection
Keywords
Publisher
  • Springer  (11)
  • American Chemical Society
  • American Chemical Society (ACS)
  • Elsevier
  • Wiley-Blackwell  (2)
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 231 (1995), S. 127-130 
    ISSN: 1572-946X
    Keywords: Gamma-ray bursts ; Counterparts ; Instrumentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The BATSE and OSSE instrument teams have modified flight software to promptly (within 2 min of trigger) slew the OSSE detectors to burst locations determined on-board by BATSE. This enables OSSE to make sensitive searches for prompt and delayed post-burst line and continuum emission above 50 keV. In the best cases our sensitivity will be more than an order of magnitude better than any other search in this energy range. We expect to slew to 1–2 bursts per month, based on the OSSE FOV and BATSE event rate. Detections or limits from continued operation of this system may provide significant constraints on burst models. As an example of the observations made using this system, we present preliminary limits for post-burst emission from GRB 950223 on several time scales.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Materials research innovations 3 (1999), S. 107-111 
    ISSN: 1433-075X
    Keywords: Key words Velocity profile measurement ; Flow patterns ; Instrumentation ; Temperature measurement ; Temperature sensing device ; Polymer melt flow ; Injection moulding ; Polymer rheology ; Polymer melts ; Polymeric meaterial
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  This article introduced a novel technique for the determination of velocity profiles in flowing polymer melts in the barrel of an injection moulding machine, this technique being called Cooled-Stainless Tube (CST). An experimental arrangement of such technique involved making use of a novel temperature sensor coupled with an experimental test rig. The CST technique was found to be novel, simple, and reliable for velocity profile measurements of flowing polymer melts. The preliminary results showed that the velocity profiles in the barrel changed continuously with changing screw position.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experimental astronomy 8 (1998), S. 297-315 
    ISSN: 1572-9508
    Keywords: Instrumentation ; speckle interferometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present a new speckle camera designed and built at Observatoire Midi-Pyrénées. This focal instrument has been used for four years with the 2-meter Bernard Lyot Telescope of Pic du Midi observatory. It can be set in various operating modes: full pupil imaging, masked-pupil imaging, spectroscopy, wave-front sensor and stellar coronagraphy, hence its name 'PISCO' ('Pupil Interferometry Speckle COronagraph'). Restored images of double and triple stars have demonstrated its capabilities in providing close to diffraction limited images (0.06′′ in V). PISCO has been fully tested and is now ready to be used by the whole astronomical community.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Accreditation and quality assurance 1 (1996), S. 24-34 
    ISSN: 1432-0517
    Keywords: Key words Quality assurance ; Instrumentation ; Installation qualification ; Acceptance testing ; Validation ; Software ; Performance control ; Performance verification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract  The quality process for commercial analytical equipment starts with the selection of the vendor. It is recommended that vendors be selected who are recognized as having quality processes in place for instrument design, development, manufacturing, testing, service, and support, for example, ISO 9001 registration. When the instrument arrives in the laboratory, the installation process should follow well-documented procedures. This includes a visual inspection that the instrument is not damaged and checking that the instrument, documentation and accessories such as cables and tubings are complete. Before the instrument is used it should be verified that it meets functional and performance specification. During operation the instruments should be periodically inspected and tested, verified to meet performance, and calibrated. The instrument should be labeled with the calibration status, indicating the dates of the last successful and the next performance verification and calibration. Defective instruments should be removed from the testing area or should at least be labeled as being "out of order."
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 227 (1995), S. 83-91 
    ISSN: 1572-946X
    Keywords: Instrumentation ; Radio Astronomy ; Plasma Astrophysics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract For nearly two decades, the aperature synthesis telescope known as the Very Large Array (VLA) has been providing a wealth of data on all types of astronomical objects. This telescope fills the need for more powerful and more sensitive instruments to gather data on a vast range of plasma phenomena in astrophysical settings. Currently the VLA is capable of observing at eight radio frequency bands (four corresponding to important spectral lines) with sensitivities on the order of 10−29 Wm −2 Hz −1, or 10−3 Jansky (1 mJy), and noise levels ten times lower. This paper describes the VLA and its capabilities, and describes how researchers interested in plasma astrophysics can use the instrument.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Space science reviews 74 (1995), S. 181-193 
    ISSN: 1572-9672
    Keywords: Space optics ; Telescope design ; Instrument design ; Instrumentation ; Stray light ; Black surfaces ; Baffles ; Contamination ; Scattering ; Bidirectional reflectance distribution function ; Point source normalized irradiance transmittance
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The performance of infrared and submillimeter systems can be severely degraded by stray light. Stray light includes off-axis radiation, system diffraction and scattering effects, and thermal self-emission. The purpose of this paper is to identify several keys to preventing system degradation due to stray radiation. The first key is to apply stray light design rules and analysis techniques early in the program before the design is finalized. A systems level analysis using stray light analysis software is often necessary in order to identify more subtle problems and to assess the magnitude of their effect on system performance. Another key is to address contamination control and the choice of surface coatings early in the program. The management of stray radiation issues is extremely cost-effective, if begun early in the program, and can reduce later schedule hardships.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Astrophysics and space science 231 (1995), S. 487-491 
    ISSN: 1572-946X
    Keywords: Gamma ray bursts ; Solid-state detectors ; Instrumentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We have evaluated several solid state detectors which offer excellent energy resolution at room temperature for soft X-rays. For soft X-rays (〈 1 keV to 20 keV), silicon P-intrinsic-N (PIN) and avalanche-mode photodiodes (APD's) have been studied. Using commercially available charge sensitive pre-amplifiers, these photodiodes provide 1 keV resolution without cooling. Their detection efficiencies are limited to about 20 keV and 15 keV, respectively. To overcome this constraint, we have studied thick (1.5 mm) PIN detectors made by Micron Semiconductor Ltd., U.K., as well as compound semiconducting materials with high “Z” constituents such as CZT and PbI2. PbI2 allows high detection efficiencies of photons up to 100 keV with detectors 100–300 microns thick. These new detectors offer the capability to study the low-energy spectral evolution of Gamma ray bursts (GRBs). A matrix of these detectors could be used as an image plane detector with moderate spatial resolution for imaging.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1572-9508
    Keywords: Space Astronomy ; UV Astronomy ; Instrumentation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Spectrum-UV Mission is an ultraviolet space observatory, scheduled to be launched at the break of the century into a 7-day, highly excentric orbit aboard a Spectrum Series platform. The Observatory is endowed with a 170-cm aperture telescope and a focal plane instrument complement for spectroscopy and imaging in the 912 to 3600 Å range. The results of an advanced feasibility study, being carried out in the four partecipating Countries (Germany, Italy, Russia and Ukraine) are presented.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1572-9508
    Keywords: Instrumentation ; gamma ray ; polarization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The proposed Tracking and Imaging Gamma-Ray Experiment (TIGRE), operating in the 0.3–100 MeV energy interval, will be an efficient polarimeter with a modulation factor of ∼50% at 0.5 MeV. The polarization detection parameters of TIGRE were estimated using a Monte Carlo simulation modified to include the polarization dependence of the Klein-Nishina formula. Using Compton scattering of low energy photons and approximately 3π acceptance angle after scattering, TIGRE will be able to measure strong sources with 20% fractional polarization at 3 σ significance in a typical balloon-borne exposure and ≤5% during a 4-week satellite observation.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Experimental astronomy 9 (1999), S. 119-187 
    ISSN: 1572-9508
    Keywords: Instrumentation ; Sky surveys ; Ultraviolet
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract I review the development of UV and EUV astronomy, covering the spectral range from 5 to 300 nm, with emphasis on sky surveys for discrete sources. I discuss studies which resulted in lists of sources observed by imaging and deliberately omit most spectroscopic studies. Technical issues, such as detector and telescope developments, are treated separately from descriptions of specific missions and their results, which contributed to the understanding of the UV sky. The missions are compared in terms of their ‘survey power’, a variable which combines sky coverage and survey depth. I use the existing knowledge of UV sources to predict views of the UV sky, which I then compare with those actually detected. Finally, UV missions which will detect fainter sources and will fly in the near future are described, and a wish list for low-cost ventures, which could considerably advance our knowledge of the UV sky, is presented.
    Type of Medium: Electronic Resource
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