Sökning: "foto"

Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet foto.

  1. 1. Elever syns på nätet : Multimodala texter och autentiska mottagare

    Författare :Dan Åkerlund; Anna Slotte-Lüttge; Ria Heilä-Ylikallio; Ola Erstad; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; skolan; lärande; kommunikation; autentiska mottagare; en dator per elev; klassbloggar; Skype; berättande; foto; demokrati; deliberativ; läroplan; multimodalitet; abduktiv ansats; DBR; fiktionsnivå; bildens presens; ; Education; Pedagogik;

    Sammanfattning : Studien tar sin utgångspunkt i att alla elever med all sannolikhet kommer att ha en dator av något slag som sitt främsta redskap i skolan inom bara några få år. Det övergripande syftet är att bidra till fördjupade kunskaper kring vad utvecklingen av datorstödd multimodal textproduktion och kommunikation på och över nätet kan innebära i en skolkontext. LÄS MER

  3. 2. (Photo)electrochemical Water Oxidation: From Catalysis to Functional Device

    Författare :Hao Yang; Licheng Sun; Marc Koper; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; artificial photosynthesis; solar fuels; water oxidation; nucleophilic attack; conjugated microporous polymer; host-guest chemistry; photoanode; perovskites; artificiell fotosyntes; solbränslen; vattenoxidation; nukleofil attack; konjugerad mikroporös polymer; värd-gästkemi; fotoanoder; perovskiter; Kemi; Chemistry;

    Sammanfattning : The key challenge within artificial photosynthesis is achieving efficient electro- or photo-driven water oxidation catalysis, a necessary process to supply the protons for the reduction reactions, thereby enabling solar fuel production. To facilitate efficient water (photo)electrolysis for solar fuel production, this thesis focuses on two aspects: 1) elucidating the O-O bond formation mechanism and developing efficient, stable, and economical water oxidation catalysts (WOCs); 2) exploring stable, low-cost, light-absorbing photoanode materials that have suitable band structures and excellent charge diffusion properties. LÄS MER

  4. 3. Treatment of textile wastewaters using combinations of biological and physico-chemical methods

    Författare :Maria Jonstrup; Bioteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; azo dyes; anaerobic-aerobic treatment; white rot fungi; laccase; photocatalysis; photo-Fenton;

    Sammanfattning : Considerable amounts of water and chemicals are used in the textile industry, and the presence of dyes in the wastewater is a problem of environmental concern. Synthetic dyes are designed to resist light, water and chemicals to improve the quality of the textiles; however, these properties also contribute to their persistence in the environment. LÄS MER

  5. 4. Ultrafast Photoinduced Processes in Core and Core–Shell Quantum Dots for Solar Cell Applications “Tiny Crystals for Big Applications”

    Författare :Mohamed Qenawy; Kemisk fysik; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum dots; core–shell; electron injection; hole injection; hole trapping; exciton migration; solar cells; ultrafast dynamics; time-resolved spectroscopy.;

    Sammanfattning : The balance between our demands of energy and the energy we are consuming is not in equilibrium anymore. Therefore, the search for other energy resources is indispensable. Sustainable energy sources offer the alternative to the fossil fuels. LÄS MER

  7. 5. Children As Eyewitnesses : Memory recall and face recognition

    Författare :Gunilla Fredin; Institutionen för psykologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; sequential lineup; confidence; question format; Child eyewitness; event memory; elimination lineup;

    Sammanfattning : Through centuries, witnesses to crimes have played an important role for the police to get a conviction of the culprit. This dissertation examined how accurate children are as witnesses of events and when participating in lineups. In Study 1, participants were tested with free recall and focussed questions. LÄS MER