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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Biochemical Systematics and Ecology 17 (1989), S. 409-415 
    ISSN: 0305-1978
    Keywords: Brachionidae ; Brachionus plicatilis ; Rotifera ; electrophoresis ; geographic variation ; rotifers ; systematics ; temporal variation ; total protein
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Meccanica 34 (1999), S. 29-38 
    ISSN: 1572-9648
    Keywords: Structural optimization ; Fracture mechanics ; Probabilistic mechanics.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The questions raised in this paper are related to an important class of problems concerning the shape optimization of brittle or quasi‐brittle elastic bodies with cracks. The optimization problems taken into consideration consist in finding the boundary of a body in such a way that the cost functional (volume of the body) reaches a minimum, while satisfying prescribed bounds on stress intensity factors. These problems are characterized by incomplete information concerning crack size, location and orientation. In this context the paper presents some possible formulations of optimal structural design problems based on probabilistic approaches. Using these approaches optimal designs for beams with surface and internal cracks have been found. Sommario.Il presente lavoro riguarda un'importante classe di problemi di ottimizzazione di forma di corpi elastici fragili o quasi fragili con fratture. I problemi di ottimizzazione considerati consistono nel trovare la forma di un corpo in modo tale che il suo volume sia minimo nel rispetto di alcune condizioni riguardanti il fattore di intensità di sforzo. Questi problemi sono caratterizzati da informazioni incomplete riguardanti le dimensioni della frattura, la sua posizione ed il suo orientamento. In questo contesto il presente lavoro presenta alcune possibili formulazioni del problema di ottimizzazione strutturale basato sull'approccio probabilistico. Usando tali approcci vengono ricavate le forme di travi ottime con fratture interne e di superficie.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 104 (1983), S. 279-291 
    ISSN: 1573-5117
    Keywords: rotifers ; Brachionus plicatilis ; biometry ; ecotypes ; cyclomorphosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Univariate comparisons and several multivariate statistical analyses have been performed to study the morphometric variability of B. plicatilis. Both laboratory clones kept under constant conditions and natural populations from different Spanish lagoons and different times of the year have been compared. The results show that not only size, but also allometric coefficients are influenced by environmental factors. However, an important genetic component in the variation of shape and size has been visualized. A clear North-South ordination of the populations of the different lagoons and an important dispersion between their summer populations as well as great differences due to seasonal variation became apparent by the multivariate statistical analysis used.
    Type of Medium: Electronic Resource
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