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  • 1990-1994  (9)
  • 1990  (9)
  • 1
    Electronic Resource
    Electronic Resource
    Characteristics of an optically pumped titanium vapor laser (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 1460-1464 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Characteristics of an optically pumped titanium vapor laser have been investigated on the 3d2 4s(4P)4p 3D01−3d3(4F)4Rs 3F2 transition at 551.4 nm. An excimer laser of 14 mJ/pulse for vaporization and an N2 laser of 5 mJ/pulse for optical pumping are employed. The laser output energy is measured as a function of buffer gas pressure, delay time, output mirror reflectivity, pumping laser intensity, and vaporizing laser intensity. The possibility of lasing on the other transitions is also discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346674
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Visible laser action in N2-laser-pumped Ti vapor (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 5378-5380 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ti vapor is produced in a He buffer gas. Ti metal is irradiated by a pulsed YAG laser, and its vapor is optically pumped by a N2 laser at 337 nm. Laser lines at 551.4, 472.3, and 471.0 nm from the Ti 3D01 level which is connected to the ground state by the 337-nm resonance line. Laser lines are reported for the first time at 551.5, 551.3, 431.5, and 547.4 nm from the 3D02, 3D03, or 3G05 levels which are not optically connected to the ground state by the 337 nm line. The laser transitions from the 3D02, 3D03, or 3G05 levels are observed only in a He-Ti mixture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347038
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Optically pumped titanium vapor laser at 551.4 nm (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 45-48 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The output characteristics of an optically pumped titanium vapor laser on various buffer gas species and pressures have been measured, and the role of buffer gas on the laser output is accordingly discussed. He, Ne, Ar, and Kr are used as buffer gases. The optimum condition for the maximum output energy is 4 Torr of He with 10 μs delay time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345226
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Amplification by stimulated emission from optically pumped nickel vapor in an ultraviolet region (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 1709-1711 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Amplification by stimulated emission has been observed from an optically pumped nickel vapor on the transitions at 347 and 381 nm. Nickel vapor was produced by direct laser vaporization, and the nickel atoms were optically pumped by a N2 laser at 337 nm. The amplification factor at 347 nm reaches a maximum after the amplification factor at 381 nm reaches a maximum. The maximum amplification factors are 1.62 and 1.69, respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104065
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  • 5
    Electronic Resource
    Electronic Resource
    In situ growth of superconducting Nd-Ce-Cu-O thin films (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 677-679 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Superconducting Nd-Ce-Cu-O thin films were epitaxially grown on SrTiO3 (100) by activated reactive evaporation. As-grown films showed the metallic temperature dependence of the resistivity and superconducting transition at 12.5 K (R=0). The remarkable parallel shift of the onset temperature of the resistive transition in the magnetic fields was observed. Ginzburg–Landau coherence lengths along the c axis and in the basal plane are 7 and 96 A(ring), respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103309
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Preparation of ferroelectric BaTiO3 thin films by activated reactive evaporation (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 527-529 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ferroelectric BaTiO3 thin films were directly and epitaxially grown on SrTiO3 single crystal and epitaxial Pt film substrates by activated reactive evaporation. The substrate temperature was around 600 °C. For (100) oriented as-grown films, a typical ferroelectric hysteresis loop and a maximum of dielectric constant at about 115 °C were observed. The resistivity was as high as 109 Ω cm and the breakdown voltage was 2.7 MV/cm for as-grown BaTiO3 films.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103300
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  • 7
    Electronic Resource
    Electronic Resource
    Tunneling measurements on superconductor/insulator/superconductor junctions using single-crystal YBa2Cu3O7−x thin films (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 683-685 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have, for the first time, made quasi-particle tunneling measurements on a YBa2Cu3O7−x(001)/Y2O3 (001)/YBa2 Cu3 O7−x (001)junction, which was epitaxially grown on a MgO(100) substrate in an in-situ process. Both layers of YBa2 Cu3 O7−x showed the same superconducting transition of Tc end =86 K with ΔT(R=10–90%)=1.5 K. Quasi-particle tunneling in the direction perpendicular to the Cu-O planes was measured. A gap parameter Δ(4.5 K) of 9.0±0.2 meV and a value of 2Δ/kTc of 3.5+0.4−0.6 were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.103311
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  • 8
    Electronic Resource
    Electronic Resource
    Viscoelastic properties of middle ear effusions from pediatric otitis media with effusion and their relation to gross appearance (1990)
    Springer
    European archives of oto-rhino-laryngology and head & neck 247 (1990), S. 60-62 
    Details
    ISSN: 1434-4726
    Keywords: Viscosity ; Elasticity ; Otitis media with effusion ; Mucociliary transport
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The viscosity and the elasticity were measured in 146 individual middle ear effusions (MEEs) from 93 children with otitis media with effusion (OME). The effusions were classified into serous or mucoid type by their macroscopic appearance. The distribution of elasticity showed two peaks, corresponding to the peaks of serous and mucoid types of effusions. There were a small number of effusions in the intermediate range of elasticity, where the effusions were most effectively transported by the cilia. These findings suggests that the MEEs of pediatric OME are accumulations of rheologically suboptimal fluid in the middle ear cavity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240953
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  • 9
    Electronic Resource
    Electronic Resource
    Secular trend and age distribution of cribra orbitalia in Japanese (1990)
    Springer
    Human evolution 5 (1990), S. 375-385 
    Details
    ISSN: 1824-310X
    Keywords: Cribra orbitalia ; Secular trend ; Age distribution ; Iron deficiency anemia ; Japanese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Cribra orbitalia is currently regarded as an indicator of environmental conditions. The prevalence and severity of this lesion in Japanese populations from prehistoric Jomon to modern times were recorded and discussed. Since the lesion was low in both frequency and grade in the late and final Jomon people from Chiba Prefecture, they presumably lived in relatively favorable environmental conditions. The increased prevalence of the lesion in the medieval Muromachi citizens of Kamakura may be attributed to the poor hygiene and social conditions. The high prevalence and marked severity of the lesion in the citizens of Edo (the old name of Tokyo) in the 17th century suggested that they lived under extremely unfavorable situations of nutrition, sanitation and medical care. Cribra orbitalia was most prevalent in adolescence (81.3%) among the Edo citizens. The incidence of the most severe type of lesion rose gradually during childhood, reached a peak in adolescence, and then gradually decreased with age. These findings would reflect intense marrow hyperplasia in the orbital roof associated with both iron deficiency anemia of long standing during the immature period and increased iron requirement in adolescence. The results obtained support the hypothesis that iron deficiency anemia is the primary factor in the etiology of cribra orbitalia. It was concluded that the incidence and severity of cribra orbitalia due to various anemic reactions reflected the dietary, hygienic, social and environmental circumstances of the populations investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02437251
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    Paper (German National Licenses)
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