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Browsing by Issue Date, starting with "2005-02"

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  • Intriguing asexual life in marginal populations of the brown seaweed Fucus vesiculosus
    Publication . Tatarenkov, A.; Bergström, L.; Jönsson, R.B.; Serrão, Ester; Kautsky, L.; Johannesson, K.
    Reproduction of attached large brown algae is known to occur only by sexual zygotes. Using microsatellites we show evolution of asexual reproduction in the bladder wrack promoting population persistence in the brackish water Baltic Sea (< 6 psu). Here a dwarf morph of Fucus vesiculosus is dominated by a single clone but clonal reproduction is also present in the common form of the species. We describe a possible mechanism for vegetative reproduction of attached algae, and conclude that clonality plays an important role in persistence and dispersal of these marginal populations, in which sexual reproduction is impaired by low salinity.
    2005-02Journal article Restricted access Show more
  • O bem-estar subjectivo nos deficientes motores
    Publication . Afonso, Marta Luísa Menino; Jesus, Saúl Neves de
    O objectivo desta investigação foi o de tentar compreender qual o nível de bem-estar subjectivo de indivíduos com deficiência motora, bem como comparar esta população específica, com os resultados provenientes da população em geral. Um segundo propósito foi estudar os efeitos da prática do desporto no bem-estar subjectivo, bem como o de observar quais as atitudes em relação ao futuro dos nossos sujeitos.
    2005-02Master thesis Restricted access Show more
  • Boundary value problems for analytic functions in the class of Cauchy-type integrals with density in
    Publication . Kokilashvili, V.; Paatashvili, V.; G. Samko, Stefan
    We study the Riemann boundary value problem , for analytic functions in the class of analytic functions represented by the Cauchy-type integrals with density in the spaces with variable exponent. We consider both the case when the coefficient is piecewise continuous and it may be of a more general nature, admitting its oscillation. The explicit formulas for solutions in the variable exponent setting are given. The related singular integral equations in the same setting are also investigated. As an application there is derived some extension of the Szegö-Helson theorem to the case of variable exponents.
    2005-02-02Journal article Open access Show more