Sökning: "NATURVETENSKAP Geovetenskap Övrig geovetenskap"

Visar resultat 21 - 25 av 35 avhandlingar innehållade orden NATURVETENSKAP Geovetenskap Övrig geovetenskap.

  1. 21. ToF-SIMS as a tool for analysing organic material in geological samples -Fluid inclusions and beyond

    Författare :Sandra Siljeström; Jukka Lausmaa; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Organic material; ToF-SIMS; Other earth sciences; Övrig geovetenskap; geokemi; Geochemistry;

    Sammanfattning : In situ analysis of organic material in rocks has potential to answer questions in geochemistry, astro- and geobiology. Recently, successful studies which included in situ analyses of geological samples with time-of-flight secondary ion mass spectrometry (ToF-SIMS) were carried out. LÄS MER

  3. 22. Environmental Assessments of Landscape Changes : Interdisciplinary studies in rural Tanzania

    Författare :Louise Simonsson; Lennart Strömquist; Annika Dahlberg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Geography; Environmental assessment; interdisciplinary methodology; landscape; perceptions; preferences; land; forest; miombo woodlands; resources; biodiversity; Tanzania; Geografi; Other earth sciences; Övrig geovetenskap;

    Sammanfattning : This thesis aims to show how biogeophysical and social processes are interlinked in landscape change, and to propose approaches for interdisciplinary environmental assessments (such as EIAs), concentrating on developing countries’ situations, and representation of findings from such studies. Landscape in its holistic sense is a very good concept and basis for intellectual and practical use in environmental dialogues. LÄS MER

  4. 23. Making travel sustainable with ICT? : The social practice of travel planning and travel information use in everyday life

    Författare :Åsa Nyblom; Mattias Höjer; Greger Henriksson; Marie Thynell; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; HUMANIORA; HUMANITIES; Travel planning; travel information; travel information services; travel planners; sustainable social practices; practice theory; everyday life; ICT; urban transport; user-centred perspective; Planering och beslutsanalys; Planning and Decision Analysis;

    Sammanfattning : Adopting the perspective of the traveller, this thesis examines how travel plans are actually made in the everyday situation and how information is used and drawn on when planning the many, often unremarkable, trips of ordinary urban life. Ethnographical field studies in southern Stockholm, Sweden, employing a practice theory perspective showed that people use a vast mixture of different types of information when planning and making trips. LÄS MER

  5. 24. Land use dynamics in the face of population increase. A study in the districts of Gatsibo and Nyagatare, Eastern Province, Rwanda

    Författare :Theophile NIYONZIMA; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; land use dynamics; land cover changes; population increase; cropping; livestock; political ecology; Rwanda;

    Sammanfattning : This thesis is about land use dynamics in areas undergoing population increase. The study was undertaken to clarify how the increasing population interacted with their physical environment through farming in Eastern Province, Rwanda. LÄS MER

  7. 25. Towards Prospective Exposure Modeling of Nanoparticles - Applying Particle Flow Analysis and Kinetic Exposure Modeling for the Cases of TiO2 and Ag Nanoparticles

    Författare :Rickard Arvidsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; exposure modeling; environmental risk assessment; nanoparticles; Particle flow analysis PFA ;

    Sammanfattning : The claims regarding the usefulness of nanoparticles (NPs) in different applications, such as wound dressings, solar cells and soil remediation, has been accompanied by concern that NPs may also pose risks to humans and to the environment. Considering the past century, when many substances later shown to cause unacceptable damage were manufactured in large amounts, there are reasons to thoroughly assess the risks of these NPs. LÄS MER