Sökning: "sites"

Visar resultat 1 - 5 av 2996 avhandlingar innehållade ordet sites.

  1. 1. Modelling and Degradation Characteristics of Thin-film CIGS Solar Cells

    Författare :Ulf Malm; Marika Edoff; Lars Stolt; James R. Sites; Uppsala universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; solar cells; thin-film; chalcogenide; stability; characterization; modelling; simulations; finite element method; CIGS; photovoltaic module; Electronics; Elektronik;

    Sammanfattning : Thin-film solar cells based around the absorber material CuIn1-xGaxSe2 (CIGS) are studied with respect to their stability characteristics, and different ways of modelling device operation are investigated. Two ways of modelling spatial inhomogeneities are detailed, one fully numerical and one hybrid model. LÄS MER

  2. 2. Languaging in virtual learning sites : studies of online encounters in the language-focused classroom

    Författare :Giulia Messina Dahlberg; Sangeeta Bagga-Gupta; Mats Tegmark; Sylvi Vigmo; David Malinowski; Örebro universitet; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; virtual learning sites; synchronous computer mediated communication; Pedagogik; Education; Utbildning och lärande; Education and Learning;

    Sammanfattning : This thesis focuses upon a series of empirical studies which examine communication and learning in online glocal communities within higher education in Sweden. A recurring theme in the theoretical framework deals with issues of languaging in virtual multimodal environments as well as the making of identity and negotiation of meaning in these settings; analyzing the activity, what people do, in contraposition to the study of how people talk about their activity. LÄS MER

  3. 3. Assessments of Advertisements on Social Networking Sites

    Författare :Hossam Deraz; Gabriel Awuah; Klaus Søilen; Gerson Tontini; Tim Foster; Högskolan i Halmstad; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Internet Marketing; Advertisements; Social networking sites; Assessment of advertisements; National Culture; Brand communities;

    Sammanfattning : Advertisements (ads) in social networking sites (SNSAs) have been considered by many researchers as a crucial area of research. However, the scope of the existing studies on consumers’ assessments of SNSAs has been very limited. LÄS MER

  4. 4. Fate and exposure assessment of PCDD/Fs at contaminated sites

    Författare :Annika Åberg; Karin Wiberg; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; contaminated sites; dioxins; PCDD F; exposure; food chain; modeling; risk assessment; physical-chemical properties; förorenade områden; dioxiner; PCDD F; exponering; födokedja; modellering; riskbedömning; fysikaliska-kemiska egenskaper; Environmental chemistry; Miljökemi;

    Sammanfattning : Polychlorinated dibenzo-p-dioxins (PCDD) and polychlorinated dibenzo-furans (PCDFs) belong to the most toxic compounds known to science and they are defined as Persistent Organic Pollutants (POPs) under the Stock-holm Convention. The general human exposure to PCDD/Fs is primarily through dietary intake. LÄS MER

  5. 5. Hazard screening of contaminated sites : bioavailable fractions and biological in vitro tools

    Författare :Daniel Ragnvaldsson; Mats Tysklind; Per Leffler; Lars Lövgren; Bengt-Erik Bengtsson; Umeå universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Hazard screening; bioavailability; metal pollution; in vitro cytotoxicity; water extraction; CCA; arsenic genotoxicity; genotoxicity; Contaminated soil; Environmental chemistry; Miljökemi;

    Sammanfattning : The environmental bioavailability of contaminants, rather than their total concentrations in the soil compartment play a decisive role for the risks associated with contaminated sites. Various soil constituents and abiotic conditions have strong influence on bioavailability, which may vary substantially between different locations. LÄS MER