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  • 1
    Digitale Medien
    Digitale Medien
    Loss of information in genetic distances (1988)
    [s.l.] : Nature Publishing Group
    Nature 336 (1988), S. 118-118 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] SIRá€"We certainly cannot dispense with DNA sequences when reconstructing evolutionary trees. Diamond1 is correct in identifying 'convergence' as one of the important features for tree reconstruction á€" the tree should not change as more data are collected. But ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/336118a0
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  • 2
    Digitale Medien
    Digitale Medien
    Confidence in evolutionary trees from biological sequence data (1993)
    [s.l.] : Nature Publishing Group
    Nature 364 (1993), S. 440-442 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Suppose we have a collection of four sequences of r-state characters (in practice, r will usually be 2, 4 or 20). If we edit the sites so that only the parsimony sites (phylogenetically informative sites) are present, then c will denote the length of these (edited) sequences. Let T,, T2 and T3 be ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/364440a0
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  • 3
    Digitale Medien
    Digitale Medien
    A New Role for the Electrophorous (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 511-512 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] In these investigations a charge is put on the polymer surface by heating in contact with a metal surface at the softening point of the polymer and then applying a static pressure which just deforms the polymer. This process is considered to be the most promising for investigation because the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/207511b0
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  • 4
    Digitale Medien
    Digitale Medien
    Pure adaptive search for finite global optimization (1995)
    Springer
    Mathematical programming 69 (1995), S. 443-448 
    Details
    ISSN: 1436-4646
    Schlagwort(e): Global optimization ; Discrete optimization ; Algorithm complexity ; Random search ; Markov chains
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Informatik , Mathematik
    Notizen: Abstract Pure Adaptive Search is a stochastic algorithm which has been analyzed for continuous global optimization. When a uniform distribution is used in PAS, it has been shown to have complexity which is linear in dimension. We define strong and weak variations of PAS in the setting of finite global optimization and prove analogous results. In particular, for then-dimensional lattice {1,⋯,k} n , the expected number of iterations to find the global optimum is linear inn. Many discrete combinatorial optimization problems, although having intractably large domains, have quite small ranges. The strong version of PAS for all problems, and the weak version of PAS for a limited class of problems, has complexity the order of the size of the range.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01585570
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  • 5
    Digitale Medien
    Digitale Medien
    The sward number and mechanical properties of plastics (1966)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 10 (1966), S. 1343-1350 
    Details
    ISSN: 0021-8995
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: A Sward rocker tester is used to obtain the Sward number for glass, mild steel, copper, poly(methyl methacrylate), polyethylene of various densities, and natural rubber. A relationship between the number and mechnical properties is investigated. It is shown that with metals and glass the number is essentially a frictional factor. With plastics and rubber it is a true hardness factor, involving dynamic Young's modulus, Poisson's ratio, and damping capacity. The aim of the investigation is to encourage the development of the Sward test as a nondestructive quality test for plastics.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/app.1966.070100912
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  • 6
    Digitale Medien
    Digitale Medien
    Ammoniakbestimmung (1912)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 51 (1912), S. 337-338 
    Details
    ISSN: 1618-2650
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01469500
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  • 7
    Digitale Medien
    Digitale Medien
    Über das Verbleiben des Arsens im Körper (1914)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 53 (1914), S. 727-728 
    Details
    ISSN: 1618-2650
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01380396
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  • 8
    Digitale Medien
    Digitale Medien
    Analyse des Gadolinits (1836)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 8 (1836), S. 44-45 
    Details
    ISSN: 0021-8383
    Schlagwort(e): Chemistry ; Organic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/prac.18360080108
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  • 9
    Digitale Medien
    Digitale Medien
    Dielectric properties of lens tissue at microwave frequencies (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Bioelectromagnetics 7 (1986), S. 73-81 
    Details
    ISSN: 0197-8462
    Schlagwort(e): permittivity measurement ; dielectric properties ; eye lens ; bound water ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Physik
    Notizen: The relative permittivity and conductivity of rabbit eye lens were measured in the frequency domain between 2 and 18 GHz at temperatures of 37 and 20°C. An analysis of the data suggested that a significant proportion of the bulk water in nuclear and cortical lens tissue may behave differently to pure water. In addition, the Maxwell-Fricke mixture theory was used to estimate the amount of hydrated water that relaxes far below 1 GHz.
    Zusätzliches Material: 4 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bem.2250070108
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  • 10
    Digitale Medien
    Digitale Medien
    Dielectric properties of developing rabbit brain at 37°C (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Bioelectromagnetics 6 (1985), S. 235-242 
    Details
    ISSN: 0197-8462
    Schlagwort(e): dielectric properties ; frequency domain ; time domain ; water of hydration ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Physik
    Notizen: The dielectric properties of developing rabbit brain were measured at 37°C between 10 MHz and 18 GHz using time domain and frequency domain systems. The results show a variation with age of the dielectric properties of brain. An analysis of the data suggests that the water dispersion in the brain of newly born animals can be represented by a Debye equation. This dispersion increases in complexity with age, and there is evidence of a smaller additional relaxation process centered around 1 GHz. It is concluded that the principal contribution to this subsidiary dispersion region arises from water of hydration.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bem.2250060304
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