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  • Springer  (45)
  • Wiley  (2)
  • 1995-1999  (47)
  • 1
    Electronic Resource
    Electronic Resource
    Risk as a primitive: a survey of measures of perceived risk (1997)
    Springer
    OR spectrum 19 (1997), S. 235-250 
    Details
    ISSN: 1436-6304
    Keywords: Key words: Risk judgement, perceived risk, axiomatic measures of risk ; Schlüsselwörter Risikobeurteilung, wahrgenommenes Risiko, axiomatische Risikomaße
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung. Risiko ist ein Konzept, das bei der Behandlung vieler volks- oder betriebswirtschaftlicher Probleme eine wesentliche Rolle spielt. Üblicherweise wird Risiko im Rahmen des traditionellen Erwartungsnutzenmodells behandelt, bei dem es nur indirekt über die Form der Nutzenfunktion erfaßt wird. Der Zweck von Nutzenfunktionen besteht aber darin, Präferenzen zu modellieren. In diesem Aufsatz wird ein Überblick über solche Ansätze gegeben, die Risikowahrnehmungen direkt modellieren. Nach einer kurzen Darstellung naiver Risikomaße, die aus der früheren ökonomischen Literatur bekannt sind, werden neuere theoretische und empirische Konzepte präsentiert.
    Notes: Abstract. The concept of risk is essential to many problems in economics and business. Usually, risk is treated in the traditional expected utility framework where it is defined only indirectly through the shape of the utility function. The purpose of utility functions, however, is to model preferences. In this paper, we review those approaches which directly model risk judgements. After a short review of naive risk measures used in earlier economic literature, we present recent theoretical and empirical developments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539781
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  • 2
    Electronic Resource
    Electronic Resource
    Strassen Laws of Iterated Logarithm for Partially Observed Processes (1997)
    Springer
    Journal of theoretical probability 10 (1997), S. 101-115 
    Details
    ISSN: 1572-9230
    Keywords: Wiener process ; law of the iterated logarithm ; subsequences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract Let a Wiener process W be observed on some nonbounded set T⊂R + . We show that alter reasonable time- and space-rescaling the correspondent interpolated sample paths converge with probability one (in the usual sense of functional laws) to some limit set in C[0, 1]. The complete description of the limit set for arbitrary T is given. Unlike the various known functional laws, this limit set is not necessarily convex. We also supply an invariance principle which permits us to obtain the same results for partially observed processes generated by the sums of i.i.d. random variables.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022694331667
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  • 3
    Electronic Resource
    Electronic Resource
    Theories for multiple resonances (1995)
    Springer
    The European physical journal 351 (1995), S. 391-396 
    Details
    ISSN: 1434-601X
    Keywords: 21.60.Jz ; 21.60.Ev ; 03.65.Sq
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Two microscope theories for multiple resonances in nuclei are compared, n-particle-hole RPA and quantized Time-Dependent Hartree-Fock (TDHF). The Lipkin-Meshkov-Glick model is used as test case. We find that quantized TDHF is superior in many respects, except for very small systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01291144
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  • 4
    Electronic Resource
    Electronic Resource
    Total charge-changing cross sections for neutron-deficient isotopes from58Ni fragmentation (1995)
    Springer
    The European physical journal 352 (1995), S. 69-75 
    Details
    ISSN: 1434-601X
    Keywords: 21.10.Ft ; 25.70.Np ; 27.40.+Z
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract At the projectile-fragment separator FRS of GSI, relativistic secondary beams of about 520 MeV/nucleon were produced by fragmentation of a primary beam of58Ni at 650 MeV/nucleon in a beryllium target. By means of aΔE—Bρ—TOF measurement, the fragments have been identified and their charge-changing probabilities in targets of CH2, C, Al, and Pb have been determined. We describe the results for the total charge-changing cross sections in this first paper, whereas a second article deals with the partial charge-changing cross sections. At the drip line, the measured charge-changing cross sections exhaust close to 100% of the total interaction cross sections as calculated with semiempirical models. The measurements at the proton drip line with low-Z targets indicate that only a very small increase of the cross sections may be observed, whereas the measurements with a lead target show that no significant increase of the total charge-changing cross sections is present which would be a hint for low-lying dipole strength. Our experimental data are compared to Glauber-type calculations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01292761
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  • 5
    Electronic Resource
    Electronic Resource
    Minimal Surfaces of Least Total Curvature and Moduli Spaces of Plane Polygonal Arcs (1998)
    Springer
    Geometric and functional analysis 8 (1998), S. 1129-1170 
    Details
    ISSN: 1420-8970
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000390050125
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  • 6
    Electronic Resource
    Electronic Resource
    On Variation Functions for Subsequence Ergodic Averages (1999)
    Springer
    Monatshefte für Mathematik 128 (1999), S. 131-150 
    Details
    ISSN: 1436-5081
    Keywords: 1991 Mathematics Subject Classification: 28D99; 60G10 ; 60G12 ; Key words: p-n or m operator ; variation function ; subsequence ergodic averages ; square functions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract.  Suppose denote the ergodic averages for the natural numbers . Let denote the corresponding maximal function and let for . We show that for if there exists such that then there exists such that . Similar weak (1,1) inequalities follow for V q when you know them for M too also with q 〉 1. We also show this fails completely if q= 1. We also show that for certain polynomial like and random sequences , if and is of exponential growth then for a certain positive constant C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s006050050051
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  • 7
    Electronic Resource
    Electronic Resource
    Light–induced charge transport processes in photorefractive barium titanate crystals doped with iron (1997)
    Springer
    Applied physics 65 (1997), S. 481-487 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 61.72.-y; 72.40.+w; 78.20.-e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: 3 ) are annealed in a hydrogen atmosphere at various temperatures. After these reducing treatments, absorption, light–induced absorption changes, two–beam coupling direction, photo electron paramagnetic resonance (photo EPR), dark and photoconductivity as well as bulk photovoltaic current density are investigated. The samples are electron conductive and the charge transport is governed by only one level, which is identified by photo EPR as Fe2+/Fe3+. The photoconductivity exceeds the dark conductivity for intensities above 1 kWm-2. A relation between the absorption constant and the Fe2+ concentration is derived. From the known charge transport parameters the advantageous photorefractive properties of optimized reduced BaTiO3:Fe are deduced; possible response times in the millisecond range at an intensity of 10 kWm-2 are estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050300
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  • 8
    Electronic Resource
    Electronic Resource
    Performance improvement of a holographic double-exposure interferometer by heating of the photorefractive recording crystal (1999)
    Springer
    Applied physics 68 (1999), S. 1069-1072 
    Details
    ISSN: 1432-0649
    Keywords: PACS: 42.40.KW; 42.65.HW; 78.20.Dj
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. A holographic double-exposure interferometer for quasi real-time analysis is realized, utilizing a photorefractive BTO:Cd crystal for hologram recording. Heating of the crystal reduces the time required to reach the steady-state working situation. Light-induced absorption losses are reduced by heating as well. Additionally, the diffraction efficiency is increased by this method. A sixfold increase in the light intensity of the reconstructed interferogram is achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003400050748
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  • 9
    Electronic Resource
    Electronic Resource
    Risk as a primitive: A survey of measures of perceived risk (1997)
    Springer
    OR spectrum 19 (1997), S. 235-250 
    Details
    ISSN: 1436-6304
    Keywords: Risk judgement ; perceived risk ; axiomatic measures of risk ; Risikobeurteilung ; wahrgenommenes Risiko ; axiomatische Risikomaße
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Description / Table of Contents: Zusammenfassung Risiko ist ein Konzept, das bei der Behandlung vieler volks-oder betriebswirtschaftlicher Probleme eine wesentliche Rolle spielt. Üblicherweise wird Risiko im Rahmen des traditionellen Erwartungsnutzenmodells behandelt, bei dem es nur indirekt über die Form der Nutzenfunktion erfaßt wird. Der Zweck von Nutzenfunktionen besteht aber darin, Präferenzen zu modellieren. In diesem Aufsatz wird ein Überblick über solche Ansätze gegeben, die Risikowahrnehmungen direkt modellieren. Nach einer kurzen Darstellung naiver Risikomaße, die aus der früheren ökonomischen Literatur bekannt sind, werden neuere theoretische und empirische Konzepte präsentiert.
    Notes: Abstract The concept of risk is essential to many problems in economics and business. Usually, risk is treated in the traditional expected utility framework where it is defined only indirectly through the shape of the utility function. The purpose of utility functions, however, is to model preferences. In this paper, we review those approaches which directly model risk judgements. After a short review of naive risk measures used in earlier economic literature, we present recent theoretical and empirical developments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01539781
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  • 10
    Electronic Resource
    Electronic Resource
    Improvement of the catalytic properties of penicillin G acylase from Escherichia coli ATCC 11105 by selection of a new substrate specificity (1995)
    Springer
    Applied microbiology and biotechnology 43 (1995), S. 679-684 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Cloned penicillin G acylase (PGA) from Escherichia coli ATCC 11105 was mutagenized in vivo using N-methyl-N′-nitrosoguanidine. Mutants of PGA were selected by their ability to allow growth of the host strain E. coli M8820 with the new substrates phenylacetyl-β-alanyl-l-proline (PhAc-βAla-Pro) phthalyl-l-leucine (Pht-Leu) or phthalylglycyl-l-proline (Pht-Gly-Pro) as sole source of proline and leucine respectively. PGA mutants were purified and immobilized onto spherical methacrylate (G-gel). The immobilized form of mutant PGA selected with (PhAc-gbAla-Pro) hydrolyzed 95% of 9 mmol penicillin G 30% faster than wild-type PGA using the same specific activities. The specific activity of the soluble enzyme was 2.7-fold, and inhibition by phenylacetic acid was halved. Immobilized PGA mutant selected with Pht-Gly-Pro hydrolyzed penicillin G 20% faster than wild-type PGA. The K m of the soluble enzyme was increased 1.7-fold. Furthermore, the latter two mutants were also 3.6-fold more stable at 45° C than wild-type PGA. The specific activity of the mutant selected with Pht-Leu was 6.3-fold lower, and inhibition by phenylacetic acid was increased 13-fold.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164773
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