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  • Electronic Resource  (25)
  • 1985-1989  (25)
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  • Electronic Resource  (25)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Comment on: "The infrared spectrum of the ν3 band of TiF4'' (1989)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 90 (1989), S. 5209-5210 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.456542
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of the electrical degradation of silicon Schottky contacts due to mercury contamination (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 2331-2332 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A micrographic investigation of the effect of mercury exposure on silicon substrates was conducted. Mercury was found to leave a residue on the silicon surface. A further study was conducted to determine the extent of electrical degradation of Si Schottky contacts due to the presence of a contaminant mercury residue between the metal and the semiconductor. It was concluded that such a layer caused uncertainties in subsequent resistivity measurements, higher capacitance-voltage (C-V) barrier heights, and observable leakage currents in current-voltage (I-V) plots taken from mercury-contaminated Si Schottky diodes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102052
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Study of oxygen addition to CF3Br reactive ion etching plasmas: Effects on silicon surface chemistry and etching behavior (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2321-2323 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The etching of silicon in CF3Br/O2 plasmas has been examined. In situ x-ray photoelectron spectroscopy shows that silicon surfaces etched in CF3Br/O2 plasmas with a proportion of 30% O2 or less are covered with a reaction layer that is mainly due to bromine bonded to silicon. As the proportion of oxygen is increased above 30% the reaction layer becomes thicker and contains mainly fluorine and oxygen, and the silicon etch rate decreases simultaneously.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101115
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Positron annihilation study of an Fe14Nd2B-type permanent magnet alloy (abstract) (1987)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 61 (1987), S. 3780-3780 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A Dy-substituted Fe14Nd2B-type permanent magnet alloy (Crumax 32) has been studied by positron annihilation lifetime spectroscopy, and also magnetic coercivity and microstructural analysis, to evaluate the effects of thermal treatment of the material. The results of this study show that the room temperature lifetime spectra can be modeled accurately using a partially constrained three-component fit. The variations in lifetime spectra induced by thermal treatment of the sintered magnet can be correlated with the concomitant decreases in coercivity and with a decrease in the surface area of free α-Fe as indicated by transmission electron microscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.338643
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Mechanism of CO bond scission at alkali promoter sites—IRAS study of the system CO/K/Ni(111) (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 86 (1987), S. 6523-6530 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: IRAS (infrared reflection absorption spectroscopy) has been employed to study the isotopic mixing reaction: 13C16O(a)+12C18O(a)→13C18O(a)+12C16O(a) on Ni(111) with preadsorbed K adatoms. Under high temperature conditions (T〉450 K) where the isotopically mixed CO is being desorbed, it has been shown that the isotopic exchange reaction cannot be detected by IRAS on the surface among CO molecules strongly interacting with K adatoms. This result implies that dissociation of CO occurs at K-promoted Ni sites followed by surface diffusion of C(a) and O(a) away from the K promoter site. Statistical recombination of C(a)+O(a) occurs with concomitant CO desorption on Ni(111) sites some distance from K centers. The empty K-promoted sites may be refilled by surface diffusion of CO from outside. Thus, alkali metal promotion of C–O bond scission may act via a "feeder-site'' mechanism connecting promoter atoms to external surface sites via surface diffusion of atomic C and O species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452444
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Efficient and selective population of high vibrational levels by stimulated near resonance Raman scattering (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 5064-5076 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: We report the successful application of an optically pumped molecular beam laser for efficient and selective population transfer from v″=0 to high lying vibrational levels of Na2 in the electronic ground state. More than 50% of the molecules in a thermally populated rotational level of v″=0 can be transferred to a state v″(very-much-greater-than)1 with typically ≥75% of the molecules excited out of the initial state found in the predetermined end vibrational level and approximately ≤25% distributed over other levels according to the Franck–Condon factors. The applicability of this technique to the study of collision processes involving vibrationally highly excited levels is discussed. This work also contributes in general to a better understanding of optically pumped dimer lasers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.453674
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    A comparison of oxygen therapy devices used in the postoperative recovery period (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 43 (1988), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Seventy-one patients scheduled to undergo upper or lower abdominal surgical procedures were allocated at random to one of seven treatment groups: in the recovery room they were to receive oxygen via a 40% Ventimask with 10 litres/minute oxygen flow, or via either a Hudson mask or a nasal cannula with 3,6 or 9 litres/minute oxygen flow. The 40% Ventimask gave the most consistent, satisfactory postoperative values of PaO2 but the much cheaper nasal cannula at 6 or 9 litres/minute was generally adequate in conscious patients. The performance of the intermediately priced Hudson mask was similar to that of the nasal cannula at these flows. The unconscious state was associated with a 45% lower PaO2 than the rousable or awake states. Differences between the treatments with regard to postoperative PaCO2 were small and non-significant. The nasal cannula with 6 litres, minute humidified oxygen flow is recommended for routine treatment, and the Ventimask for unconscious patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1988.tb05483.x
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  • 8
    Electronic Resource
    Electronic Resource
    Unstable cervical fracture (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 42 (1987), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The anaesthetic management of a 26-year-old woman who sustained an unstable fracture of C2 when 40 weeks pregnant, is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1987.tb05320.x
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Innovation: Adaptation and Growth. (1989)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 19 (1989), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1989.tb00658.x
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  • 10
    Electronic Resource
    Electronic Resource
    Cost benefit and public policy issues (1989)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 19 (1989), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: AbstractThe paper reviews the work done and conclusions reached on resource allocation to R&D in the public sector in the last twenty years, and examines what changes have been made in the field of R&D assessment. The paper is based mainly on the author's experience with the UK government's Programmes Analysis Unit (PAU) which was set up in the early 1960s.The Unit's main remit was to examine and disseminate techniques by the use of which the benefit to the nation from possible R&D strategies, programmes and projects might be calculated. It was also called in to help review policy and carry out long-range forecasting. In the course of its existence — it was wound up in 1977 — it analysed many new techniques of analysis which have now passed into common use and took part in studies to support decisions at all levels from the macro-economic sector down to the individual project.The author lists the benefits derivable from such analyses — helping to identify objectives, assemble total programmes, evaluate efficiency of technological transfer, carry out technology assessment and so on. But he warns of their limitations.As for the present day, the author is unhappy about the importance given by the UK Government to the market as a test of value in decision-making about R&D, in so far as it leads to neglect of long-term issues and relies on uncertain causal relationships among critical inputs. Cost-benefit is adequate for dealing with short-term, small-scale projects. For larger projects with controversial long-term implications he advocates broader-based techniques such as multi-attribute analysis, which bring the interests of many parties into the judgment and take into account considerations such as the environment, finite resources and social
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1989.tb00633.x
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