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Visar resultat 1 - 5 av 1304 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Influences, effects and changes from interventions by eco-labelling schemes - What a Swan can do?

   Författare :Åke Thidell; Internationella miljöinstitutet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Direct effect; Eco-labelling; Intervention theory; Environmental labelling; Nordic Swan; Measurement method; Indirect effect;

   Sammanfattning : Eco-labelling is a voluntary and informative policy instrument aiming at stimulating environmentally beneficial product development through using the market forces. The Nordic Swan eco-labelling scheme has been in operation since 1989. LÄS MER

3. 2. Studies of Volcanic Influence on Aerosols, Clouds and Climate

   Författare :Johan Friberg; Ergonomi och aerosolteknologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lowermost stratosphere; volcanic aerosol; upper troposphere; sulfurous aerosol; carbonaceous aerosol; ion beam analysis; volcanism; indirect effect; radiative forcing; direct effect; Stratosphere; Fysicumarkivet A:2016:Friberg;

   Sammanfattning : This thesis focuses on the influence of volcanism on the compositions of the aerosols in the upper troposphere (UT) and lowermost stratosphere (LMS), and their direct and indirect impact on climate. Aerosol data were obtained by aircraft-borne sampling, using the CARIBIC (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container) platform, and laboratory-based ion beam analysis of aerosol samples at the Lund Ion Beam Analysis Facility (LIBAF). LÄS MER

4. 3. Crystallization of chiral compounds-Possibilities and limitations for resolution by direct crystallization

   Författare :Veronica Profir; KTH; []
   Nyckelord :metastable racemate; nucleation; solvent effect; solubility; direct crystallization; in situ IR spectroscopy; multivariate calibration;

   Sammanfattning : .... LÄS MER

5. 4. Enhancing Direct Searches for Dark Matter : Spatial-Temporal Modeling and Explicit Likelihoods

   Författare :Bart Eduard Jan Pelssers; Jan Conrad; Jochen Schieck; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Dark matter; direct detection; statistical analysis; fysik; Physics;

   Sammanfattning : Astronomical and cosmological observations on different scales point to the existence of dark matter. In the current cosmological paradigm this dark matter accounts for about 26% of the energy-density of the universe, yet has not been directly observed. LÄS MER

7. 5. Direct and indirect magnetocaloric properties of first- and second-order phase transition materials

   Författare :Sagar Ghorai; Peter Svedlindh; Martin Sahlberg; Gabriella Andersson; Ekkes Brück; Uppsala universitet; []
   Nyckelord :Magnetocaloric effect; Adiabatic temperature change; Direct measurement of magnetocaloric effect; Griffiths phase; Magneto-elastic transition; Magneto-structural transition; Second-order magnetic phase transition; First-order magnetic phase transition; Isothermal magnetic entropy change; Fysik; Physics;

   Sammanfattning : The energy-efficient and environmentally friendly alternative cooling technology based on the magnetocaloric effect (MCE) is discussed in this thesis. The thesis has two major parts, one devoted to material characterization and the other to instrument development. LÄS MER