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  • 1995-1999  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Excess Molar Enthalpies of Chloroalkanes or Chloroalkene + 2-Propyn-1-ol at 298.15 K (1995)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 40 (1995), S. 1056-1057 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je00021a005
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Visibility with Multiple Reflections (1998)
    Springer
    Discrete & computational geometry 20 (1998), S. 61-78 
    Details
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. We show that the region lit by a point light source inside a simple n -gon after at most k reflections off the boundary has combinatorial complexity O(n 2k ) , for any k≥ 1 . A lower bound of Ω ((n/k-Θ(1)) 2k ) is also established which matches the upper bound for any fixed k . A simple near-optimal algorithm for computing the illuminated region is presented, which runs in O(n 2k log n) time and O(n 2k ) space for k〉1 , and in O(n 2 log 2 n) time and O(n 2 ) space for k=1 .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00009378
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  • 3
    Electronic Resource
    Electronic Resource
    Visibility with One Reflection (1998)
    Springer
    Discrete & computational geometry 19 (1998), S. 553-574 
    Details
    ISSN: 1432-0444
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mathematics
    Notes: Abstract. We extend the concept of the polygon visible from a source point S in a simple polygon by considering visibility with two types of reflection, specular and diffuse. In specular reflection a light ray reflects from an edge of the polygon according to the rule: the angle of incidence equals the angle of reflection. In diffuse reflection a light ray reflects from an edge of the polygon in all inward directions. Several geometric and combinatorial properties of visibility polygons under these two types of reflection are described, when at most one reflection is permitted. We show that the visibility polygon Vs(S) under specular reflection may be nonsimple, while the visibility polygon Vd(S) under diffuse reflection is always simple. We present a Θ(n 2 ) worst-case bound on the combinatorial complexity of both Vs(S) and Vd(S) and describe simple O(n 2 log 2 n) time algorithms for constructing the sets.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00009368
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Characteristics of VHF radiowave scintillations over a solar cycle (1983–1993) at a low-latitude station: Waltair (17.7°N, 83.3°E) (1997)
    Springer
    Annales geophysicae 15 (1997), S. 729-733 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The characteristics of VHF radiowave scintillations at 244 MHz (FLEETSAT) during a complete solar cycle (1983–93) at a low-latitude station, Waltair (17.7°N, 83.3°E), are presented. The occurrence of night-time scintillations shows equinoctial maxima and summer minima in all the epochs of solar activity, and follows the solar activity. The daytime scintillation occurrence is negatively correlated with the solar activity and shows maximum occurrence during the summer months in a period of low solar activity. The occurrence of night-time scintillations is inhibited during disturbed days of high solar activity and enhanced during low solar activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-997-0729-3
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Gamma knife surgery for craniopharyngioma (1995)
    Springer
    Acta neurochirurgica 134 (1995), S. 167-176 
    Details
    ISSN: 0942-0940
    Keywords: Craniopharyngioma ; Gamma Knife ; radiosurgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We present our results of Gamma Knife surgery for craniopharyngioma in nine patients. The current status of surgery, radiation therapy, intracavitary instillation of radionucleides and Gamma Knife surgery in the management of craniopharyngiomas is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01417685
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  • 6
    Electronic Resource
    Electronic Resource
    Failure in management of pituitary tumors discussion of 3 cases (1995)
    Springer
    Acta neurochirurgica 134 (1995), S. 159-166 
    Details
    ISSN: 0942-0940
    Keywords: Failure ; pituitary adenoma ; treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Three patients with pituitary adenomas (ACTH-secreting, non-secretory, and multi-secretory) with unfavorable course, in spite of repeated microsurgery, drag therapy, as well as radiotherapy and radiosurgery, are presented. Each case was re-evaluated for possible flaws in management. Two of the invasive tumors continued to grow, in spite of correct management. The third patient with a pituitary adenoma underwent microsurgical resection, and later following a false positive finding of recurrence, received radiotherapy and underwent radiosurgery. The lesion actually was chronic inflammatory tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01417684
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Experimental study of dispersive effects in fiber ring lasers (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 447-448 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of dispersion on the pulsewidth of a mode-locked fiber ring laser are examined. We have identified two different modes of operation, one where the pulsewidth is determined by the path-integrated (global) dispersion of the cavity and another novel mode where pulsewidth is not limited by the global dispersion. Experimental results show that for some configurations, the local dispersion of the cavity plays an important role in determining the pulsewidth of the laser. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116408
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  • 8
    Electronic Resource
    Electronic Resource
    Lubrication of rollers by power law fluids considering consistency-variation with pressure and temperature (1995)
    Springer
    Acta mechanica 111 (1995), S. 223-239 
    Details
    ISSN: 1619-6937
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The steady state lubrication of two rigid cylindrical rollers under entraining and squeezing motion including cavitation is studied. The lubricant consistencym of the power law fluid is assumed to be pressure and temperature dependent. A numerical solution to the coupled Reynolds' and energy equation for pressure and temperature has been obtained using higher order predictor corrector method. Also several other bearing characteristics such as load, traction ratios, maximum pressure, location of pressure maximum, temperature ratios etc. are calculated and discussed in detail for different values of the power law index including the Newtonian fluid behaviour. A comparison of the present results with those under isothermal condition is also made. It is concluded that the effect of temperature is to shift the position of the pressure peak slightly away from the center line of contact, whereas the trend is opposite for the cavitation points. The variation in consistency is found to be very significant, especially in the pressure peak region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01376932
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