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  • 1990-1994  (3)
  • 1960-1964
  • 1955-1959
  • 1925-1929
  • Engineering  (1)
  • TNO Landolt C optotype  (1)
  • existence  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The determination of the central static visual acuity (1992)
    Springer
    Documenta ophthalmologica 82 (1992), S. 9-14 
    Details
    ISSN: 1573-2622
    Keywords: Pro Oculis ; TNO Landolt C optotype ; Wall-charts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract In identical experimental situations we tested 22 adults with our proposed Landolt C wall-chart and the so-called TNO Landolt-C chart. Contrary to theoretical expectations, it appeared that there was only a slight difference in the measured visual acuities. Further study will show whether this is an incidental or a structural occurrence.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00156987
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Functional and numerical solution of a control problem originating from heat transfer (1991)
    Springer
    Journal of optimization theory and applications 68 (1991), S. 49-73 
    Details
    ISSN: 1573-2878
    Keywords: Nonlinear parabolic equations ; functional analysis ; existence ; uniqueness ; control problems ; Newton's method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The solution of a nonlinear parabolic equation is studied from both the functional and the numerical points of view. Existence, uniqueness, and stability results are given. A boundary-control problem is then presented. Expressions of the gradient and the Hessian of the cost function are given with some details, and the Newton method is compared with a gradient method and the Fletcher-Reeves method. Numerical results are given. The paper concludes with a discussion of the advantages of the Newton method as applied to a control problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00939935
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison of numerical solutions of a one-dimensional non-linear heat equation (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Communications in Applied Numerical Methods 7 (1991), S. 233-240 
    Details
    ISSN: 0748-8025
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics , Technology
    Notes: The aim of this communication is to compare different algorithms for the solution of the 1-D non-linear heat equation. A standard finite-element method is implemented for the space discretization which transforms the initial problem into a non-linear ordinary differential system. This new system is then solved by means of seven classical algorithms included in the ACSL software (advanced continuous simulation language). Three test cases are considered, and results are compared with available analytical solutions.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cnm.1630070308
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    Paper (German National Licenses)
    Fulltext
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