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  • 1980-1984  (5)
  • 1975-1979  (2)
  • 1965-1969  (2)
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Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Influence of weak reflections from anti-reflection coated surfaces on CO2 laser optics design (1982)
    Springer
    Optical and quantum electronics 14 (1982), S. 327-330 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The influence of interference due to weak reflections from anti-reflection coated surfaces in CO2 laser optics is discussed and analysed. In certain cases quite low reflection levels (∼1%) are shown to lead to uncertainties in the mirror transmission coefficient or produce a non-uniform power loading on the mirror surface, resulting in damage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00619744
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    A repetitively pulsed sealed-TE CO2 laser using an oxygen tolerant discharge scheme (1981)
    Springer
    Applied physics 26 (1981), S. 169-172 
    Details
    ISSN: 1432-0649
    Keywords: 42.55 DK
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A repetitively pulsed (≦40 Hz) TE CO2 laser using an oxygen tolerant discharge scheme is described. Long lived (〉105 shots) stable discharges at high pump energy density (∼200 J.l−1 atm−1) have been achieved both with and without the use of additive gases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692442
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    Paper (German National Licenses)
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  • 3
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    The Effect of the Home on the School in Trinidad (1968)
    Kingston, Jamaica : Periodicals Archive Online (PAO)
    Social and economic studies. 17:4 (1968:Dec.) 435 
    Details
    ISSN: 0037-7651
    Topics: Sociology , Economics
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:5209-1968-017-04-000006
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Voltage-current characteristics of superatmospheric pressure CO2 laser discharges (1978)
    Springer
    Applied physics 17 (1978), S. 27-30 
    Details
    ISSN: 1432-0630
    Keywords: 52.80 ; HC 51.50+v ; 42–55 DK
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The voltage-current characteristics of a UV preionised CO2 laser operating at pressures ≲13 atmospheres have been investigated and the quasi-steady glow and breakdown fields measured. The discharge resistivity has been found to be a function of the applied excitation field and a simple model has been developed to explain the results obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00885026
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of circuit and UV prioniser parameters on the performance of a discharge pumped KrF laser (1979)
    Springer
    Applied physics 18 (1979), S. 357-361 
    Details
    ISSN: 1432-0630
    Keywords: 42.55 Hq 42.60 By
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The influence of the preioniser and main discharge circuit parameters on the performance of a high pressure UV preionised KrF laser using NF3 as the fluorine donor has been investigated. Output laser energy densities of 1.7J·1−1 based on the mode volume have been obtained under optimised conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00899689
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Pulse evolution in injection mode locked TECO2 lasers (1980)
    Springer
    Applied physics 23 (1980), S. 245-251 
    Details
    ISSN: 1432-0630
    Keywords: 42.55 DK ; 42.60 By
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The pulse train evolution in an injection mode locked TECO2 laser has been investigated for a wide range of input pulse widths e.g., ranging from the cavity round-trip time to near the bandwidth-limited value for the system. Regimes in which pulse narrowing and pulse broadening occur have been identified and are discussed. The combined use of injection and saturable-absorber mode-locking techniques has produced reliable subnanosecond pulse trains from a large aperture TEACO2 laser.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00914907
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    HLA antigens and risk factors for nephropathy in Type 1 (insulin-dependent) diabetes mellitus (1984)
    Springer
    Diabetologia 27 (1984), S. 3-7 
    Details
    ISSN: 1432-0428
    Keywords: Type 1 diabetes ; nephropathy ; risk factors ; HLA antigens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary This study of risk factors for diabetic nephropathy in juvenile Type 1 (insulin-dependent) diabetes mellitus compares two carefully characterised groups of patients, one with proteinuria (n = 23), the other a control group (n = 24) with no evidence of nephropathy despite more than 25 years of diabetic life. No significant difference was observed between the groups in any HLA-A, -B or -DR antigen or Bf allotype. DR3 was present in 87% of patients with proteinuria and 75% of the diabetic control group; DR4 was present in 48% of patients with proteinuria and 63% of diabetic controls; BfFl was present in 17% of patients with nephropathy and 9% of the diabetic control group. Compared with the control group, patients with proteinuria had significantly higher mean diabetic-clinic blood glucose concentrations before the diagnosis of microvascular disease, a significantly earlier age at diagnosis of diabetes, and had more often been treated with once-daily as opposed to twice-daily insulin regimens. Susceptibility to nephropathy in Type 1 diabetes appears to be determined by the quality of metabolic control and age of onset of diabetes; although the number of subjects studied was relatively small no evidence was found of any influence of HLA or Bf phenotype.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00253492
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    An HLA-DR negative acute leukaemia which stimulates MLC and CMC responses (1983)
    Springer
    Cancer immunology immunotherapy 16 (1983), S. 117-122 
    Details
    ISSN: 1432-0851
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We describe an acute myelomonocytic leukaemia (E72) devoid of cell-surface HLA-DR antigens, but capable of inducing cellular responses. Leukaemia E72 induced proliferation of normal lymphocytes in primary mixed lymphocyte culture (MLC), which was only weakly inhibited by anti-DR sera. Depletion of a small percentage (≃4%) of DR+ cells on a cell-sorter failed to abrogate the capacity of E72 to stimulate MLC and cell-mediated cytotoxicity (CMC) responses. We found that normal lymphocytes primed with E72 responded in secondary MLC to lymphocytes and leukaemias, suggesting that the lymphocyte-activating determinant (LAD) on E72 is not leukaemia-specific. In addition, E72 induced CMC responses to both leukaemias and lymphocytes. We suggest that E72 may express a novel HLA or non-HLA LAD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00199243
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Extension of square-root filtering to include process noise (1969)
    Springer
    Journal of optimization theory and applications 3 (1969), S. 444-458 
    Details
    ISSN: 1573-2878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Two different square-root filters, one obtained by Potter and the other employing Householder transformations, are extended to include process noise. The relative numerical accuracy of various sequential filters is explored with several examples.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00929358
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    Paper (German National Licenses)
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