Sökning: "threats"

Visar resultat 21 - 25 av 469 avhandlingar innehållade ordet threats.

  1. 21. Bridging the distance : children’s strategies on the internet

    Författare :Elza Dunkels; Gun-Marie Frånberg; Lisbeth Lundahl; Ola Erstad; Umeå universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Internet; net cultures; children; digital native; online threats; counter-strategies; online interviews; online ethics; Pedgogical work; Pedagogiskt arbete;

    Sammanfattning : This thesis deals with the following questions: What do children find negative on the Internet? What counter strategies do they use? How have they developed these strategies? The method used is one-to-one online interviews and the analyses are qualitative in nature. The sample is children in grade 6 of the Swedish compulsory school, aged between 11 and 13. LÄS MER

  3. 22. Phenotypic responses of zooplankton to variable conditions

    Författare :Marcus Lee; Enhet akvatisk ekologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Multiple threats; Plasticity; Risk-Spreading; sexual conflict; ultraviolet radiation; Daphnia; Copepods;

    Sammanfattning : Organisms are continually challenged by multiple threats in the environment, and such threats are seldom constant in either time or space. Therefore, organisms must maintain physiological, behavioural, morphological and life- history adaptations across environments to prevent reductions in fitness. LÄS MER

  4. 23. Security in Physical Distribution Networks - A Survey Study of Swedish Transport Operators

    Författare :Luca Urciuoli; Teknisk logistik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; antagonistic threats.; supply chain security; cargo security; physical distribution security; transportation security; cargo theft; Quantitative Risk Assessment;

    Sammanfattning : The objective of this study is to understand what factors influence the security of physical distribution networks. Thereafter it aims to bring to light what security measures exist today to enhance security and finally how to determine the profitability of security investments. LÄS MER

  5. 24. Pathogens and other threats to Pinus contorta in northern Sweden

    Författare :Margareta Karlman; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Pinus contorta; Pinus sylvestris; provenance; weather damage; vole damage; parasitic fungi; Gremmeniella abietina; Phacidium infestans; Sweden;

    Sammanfattning : The background to the large-scale planting of Pinus contorta in northern Sweden is reviewed with an account of the distribution and characteristics ofPi nus contorta within its natural range in western North America. The threatsto successful planting of exotics are discussed in relation to the historicalbackground. LÄS MER

  7. 25. Biology, ecology and anthropogenic threats of Indo-Pacific bottlenose dolphins in east Africa

    Författare :Omar A. Amir; Per Berggren; Graham Pierce; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Growth; reproduction; feeding ecology; bycatch; organohalogen compounds; dolphins; Tursiops aduncus; Zanzibar; East Africa; Marine ecology; Marin ekologi; zoologisk ekologi; Animal Ecology;

    Sammanfattning : This thesis examines the biology, ecology and anthropogenic threats of Indo-Pacific bottlenose dolphins (Tursiops aduncus) off Zanzibar, Tanzania, based on research conducted and samples collected between 2000 and 2008. Distribution and occurrence are described based on incidental catches (bycatch) in gillnet fisheries. LÄS MER