Sökning: "water mist"

Visar resultat 6 - 10 av 10 avhandlingar innehållade orden water mist.

  1. 6. Lithium-ion Battery Safety - Assessment by Abuse Testing, Fluoride Gas Emissions and Fire Propagation

    Författare :Carl Fredrik Larsson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fire; thermal runaway; gas emission; gas explosion; propagation; safety; abuse testing; Lithium-ion; cell case explosion; hydrogen fluoride;

    Sammanfattning : Lithium-ion batteries offer high energy and power densities as well as long life time but have a more narrow stability window compared to other battery types and contain reactive and flammable materials. In case of overheating the battery cell can release gas (vent) and, at temperatures of about 150-200 °C, a so called thermal runaway can occur, that is a rapid self-heated temperature increase which is typically accompanied with a large release of smoke and gas, fire and a potential cell case explosion or gas explosion. LÄS MER

  3. 7. Additive Manufacturing and Integration of 3D MEMS using Ultrafast Lasers and Magnetic Assembly

    Författare :Simone Pagliano; Frank Niklaus; Göran Stemme; Gijs Krijnen; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; additive manufacturing; 3D printing; 3D micromachining; two-photon polymerization; MEMS; polyimide; ultrafast laser; laser micromachining; vertical integration; magnetic assembly; stochastic assembly; diminutive chips;

    Sammanfattning : The geometry of MEMS devices is limited by the technologies used to fabricate them. Today, microsystems are manufactured with patterning technologies that allow only for 2D and 2.5D geometries. LÄS MER

  4. 8. Physiological adaptations in two ecotypes of Fucus vesiculosus and in Fucus radicans with focus on salinity

    Författare :A Maria Gylle; Nils GA Ekelund; Stefan Falk; Pauli Snoeijs; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Bothnian Sea; brackish; brown algae; D1; 77 K fluorescence emission; Fucus vesiculosus; Fucus radicans; light-harvest antenna; mannitol; marine; NMR; Norwegian Sea; quantum yield; photosynthetic maximum capacity Pmax ; photosystem; PSI; PSII ; PsaA; Rubisco; salinity.; Biology; Biologi; Plant physiology; Växtfysiologi;

    Sammanfattning : The in origin intertidal marine brown alga Fucus vesiculosus L. grow permanently sublittoral in the brackish Bothnian Sea, side by side with the recently discovered F. radicans L. Bergström et L. LÄS MER

  5. 9. Everything has its processes, one could say : a longitudinal study following students' ideas about transformations of matter from age 7 to 16

    Författare :Lena Löfgren; Gustav Helldén; Margareta Ekborg; John Leach; Högskolan Kristianstad; []
    Nyckelord :SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; longitudinal study; primary education; secondary education; science learning; transformations of matter; the particulate nature of matter; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; Education; Pedagogik;

    Sammanfattning : This thesis concerns students’ learning and meaning-making in science. The theoretical framework builds upon Human Constructivism. This perspective underlines the unique interplay that occurs between thinking, feeling, and acting in human meaning-making and also stresses the important role of language in learning processes. LÄS MER

  7. 10. Everything has its processes, one could say - A longitudinal study following students’ ideas about transformations of matter from age 7 to 16

    Författare :Lena Löfgren; Margareta Ekborg; Malmö högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; longitudinal study; primary education; secondary education; science learning; transformations of matter; the particulate nature of matter; longitudinell studie; grundskola; lärande i naturvetenskap; materietransformationer; materiens partikelnatur; transformations of matter; science learning; secondary education; primary education; longitudinal study; the particulate nature of matter;

    Sammanfattning : Denna avhandling handlar om elevers lärande och meningsskapande i naturvetenskap. Det teoretiska ramverket bygger på Human Constructivism. Detta perspektiv framhåller det unika samspel som äger rum mellan tankar, känslor och handlingar då människor skapar mening. Perspektivet betonar också språkets viktiga roll i lärandeprocesser. LÄS MER