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  • 1
    Electronic Resource
    Electronic Resource
    Indirect drive experiments utilizing multiple beam cones in cylindrical hohlraums on OMEGA : The 39th annual meeting of division of plasma physics of APS (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 1960-1965 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Current plans for time-dependent control of flux asymmetry in the National Ignition Facility [J. A. Paisner, J. D. Boyes, S. A. Kumpan, and M. Sorem, "The National Ignition Facility Project," ICF Quart. 5, 110 (1995)] hohlraums rely on multiple beam cones with different laser power temporal profiles in each cone. Experiments with multiple beam cones have begun on the Omega laser facility [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] at the University of Rochester. In addition to allowing symmetry experiments similar to those performed on Nova [A. Hauer et al., Rev. Sci. Instrum. 66, 672 (1995)], the Omega facility allows multiple beam cones to be moved independently to confirm our ability to model the resulting implosion image shapes. Results indicate that hohlraum symmetry behaves similarly with multiple rings of beams as with a single ring, but with the weighted beam spot position used to parametrize the beam pointing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872866
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  • 2
    Electronic Resource
    Electronic Resource
    Symmetry experiments in gas-filled hohlraums at NOVA (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 2022-2028 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Understanding drive symmetry in gas-filled hohlraums is currently of interest because the baseline design of the indirect drive ignition target for the planned National Ignition Facility uses a gas-filled hohlraum. This paper reports on the results of a series of experiments performed at the Nova laser [C. Bibeau et al. Appl. Opt. 31, 5799 (1992)] facility at Lawrence Livermore National Laboratory with the goal of understanding time-dependent drive symmetry in gas filled hohlraums. Time-dependent symmetry data from capsule implosions and reemission targets in gas-filled hohlraums are discussed. Results of symmetry measurements using thin wall gas-filled hohlraums are also discussed. The results show that the gas is effective in impeding the motion of the wall blowoff material, and that the resulting implosion performance of the capsule is not significantly degraded from vacuum results. The implosion symmetry in gas differs from vacuum results with similar laser pointing indicating a shift in beam position on the hohlraum wall and hotter drive at the capsule's poles than at the equator. A theory has been proposed to explain the observed shift as a plasma physics effect: beam steering due to filamentation and transverse plasma flows. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871999
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  • 3
    Electronic Resource
    Electronic Resource
    Multiple detector triple coincidence spectrometer for (e,3e) electron impact double-ionization measurements (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 3137-3143 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An (e,3e) spectrometer for the study of double ionization of magnesium by electron impact is described. With the spectrometer the angular and energy distributions of the ejected electrons can be measured over a range of incident-electron energies. The spectrometer incorporates two ejected-electron electrostatic energy analyzers and a tandem electrostatic analyzer for the scattered electrons. Up to eight detectors can be placed at the focal planes of each of the ejected analyzers. This increases the data rate by a factor of 64 over arrangements with two ejected-electron detectors. In order to reduce noise and establish the energy of the final state of the doubly charged residual magnesium ion, triple-coincidence electronics are used with a preprocessing circuit to reduce dead time. The first double-ionization study with the instrument was the ejection of a 2p inner valence electron by a 3.5 keV incident electron accompanied by the subsequent filling of the 2p hole and the emission of a 35 eV Auger electron. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145542
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  • 4
    Electronic Resource
    Electronic Resource
    A 32-channel preamplifier chip for the multiplicity vertex detector at PHENIX (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 1684-1687 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The TGV32, a 32-channel preamplifier–multiplicity discriminator chip for the multiplicity vertex detector (MVD) at PHENIX, is a unique silicon preamplifier in that it provides both an analog output for storage in an analog memory and a weighted summed-current output for conversion to a channel multiplicity count. The architecture and test results of the chip are presented. Details about the design of the preamplifier, discriminator, and programmable digital–analog converters performance as well as the process variations are presented. The chip is fabricated in a 1.2 μm, n-well, complementary metal–oxide–semiconductor process. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149651
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  • 5
    Electronic Resource
    Electronic Resource
    A STUDY OF PLASMA DIAZEPAM LEVELS IN MOTHER AND INFANT (1977)
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 84 (1977), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A 10 mg dose of diazepam was given intravenously to mothers at 15 to 205 minutes before delivery, and plasma diazepam concentrations were measured by gas-liquid chromatography in mothers and infants at delivery and again 24 hours later. The plasma levels in the infants were always significantly higher than in the mothers but there was no evidence to suggest that the newborn were unable to metabolize the drug. All infants had a good Apgar score at birth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.1977.tb12659.x
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  • 6
    Electronic Resource
    Electronic Resource
    Polymerization of a 1,2,3-Trithiane to a High Molecular Weight Polymer (1977)
    s.l. : American Chemical Society
    Macromolecules 10 (1977), S. 718-719 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60057a050
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  • 7
    Electronic Resource
    Electronic Resource
    BACTERIAL RELATIONSHIPS IN STORMWATERS (1977)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 13 (1977), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : Data were developed within a three-year period for indicator bacteria and three species of bacterial pathogens following rural storm event hydrographs. The first flush concept was confirmed in all hydrographs. Bacterial density peaking occurred at or before the hydrograph peaks. FC and FS values were higher in more developed areas than the primary rural test site and their numerical ratios followed similar trends. Chlorine demand of storm waters varied between 8 and 16 mg/l and, the ozone requirement was greater than 32 mg/l in the same waters. Aftergrowth of total coliform bacteria occurred following chlorine and ozone doses of 16 mg/l and 32 mg/l respectively. Fecal coliform, fecal streptococci, Salmonella sp., and Pseudomonas sp. all were reduced to near detectable limits by the disinfectants up to 8 days. Staphylococcus sp. demonstrated a propensity to restablish their populations. Multiple regression analysis of the bacterial groups and species in storm waters suggested the fecal streptococci to have been the most useful group in evaluating bacterial storm water quality, with staphylocci have been closely related insofar as their statistical significance was concerned.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1977.tb03856.x
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  • 8
    Electronic Resource
    Electronic Resource
    Reproductive biology of anadromous arctic char, Salvelinus alpinus (L.)? in the Cumberland Sound area of Baffin Island (1975)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 7 (1975), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The ovaries of anadromous arctic char, Salvelinus alpinus (L.), captured during 1973 from four high arctic rivers on Baffin Island started to increase in weight early in July and were at their heaviest in mid-September just before spawning. At this time, 40 cm (615 g) char from two rivers contained ovaries weighing 17.0 g (dry) which differed significantly from the 22.5 g gonads of comparable char from the other two areas. Gonadal development in male fish began in June and the diameter of testes at full maturity (3.0–4.0 cm) was similar regardless of river system. Fecundity of comparable fish varied significantly among the rivers with char 40 cm in length containing 1400–2400 eggs while the corresponding values for 60 cm (i.e. 2050 g) char ranged from 4000–5500. The diameter of both immature and mature eggs was similar regardless of system. Values for immature eggs averaged 0.64 mm in 40 cm fish and 1.60 mm in 60 cm specimens. Diameter of mature eggs, on the other hand, was considerably greater (3.2 and 4.3 mm, respectively). Maturity was first reached at age 10 (i.e. 35 cm) in both males and females and maturing fish of both sexes were not always restricted to fresh water. Redd construction occurred at a depth of one to at least 11 m at a temperature of 0.5–4.0° C. The percentage of eggs retained in the body cavity after spawning varied from 0.22–1.50 and the mortality rate of spawned eggs was extremely low.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1975.tb04584.x
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  • 9
    Electronic Resource
    Electronic Resource
    Anaesthesia Clinical Directors in the United Kingdom: organisation, objectives and support needs (1999)
    Oxford : Blackwell Science Ltd
    Anaesthesia 54 (1999), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A postal survey of all 269 acute hospital trusts identified in the United Kingdom was carried out to study the work of Clinical Directors of anaesthesia. Initial responses from 163 Clinical Directors and 129 completed questionnaires were analysed. Four main areas of concern revealed by the survey were contracts and objectives, funding of managerial sessions, access to information and perceived need for support. Most Clinical Directors had no job description and most had no formal written objectives, despite a substantial body of advice that these should be provided. There was generally substantial underfunding of managerial hours compared with those actually worked and approximately 20% of Clinical Directors surveyed had no funding for managerial duties. Clinical Directors' ratings of the information available to assist their decision making were also a cause of concern. Clinical Directors perceived that they need better networking, more training particularly on human resource management and improved management information.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2044.1999.00960.x
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  • 10
    Electronic Resource
    Electronic Resource
    Attempts to attenuate the cardiostimulatory effects of ketamine (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 33 (1978), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1978.tb08385.x
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