Sökning: "physical environment"
Visar resultat 16 - 20 av 1450 avhandlingar innehållade orden physical environment.
16. Carbon metabolism in clear-water and brown-water lakes
Sammanfattning : The trophic state of lakes is commonly defined by the concentration of nutrients in the water column. High nutrient concentrations generate high phytoplankton production, and lakes with low nutrient concentrations are considered low-productive. LÄS MER
17. ”Fysisk aktivitet –att röra sig och må väl.” Villkor och dilemman för äldres fysiska aktivitet : En observations- och intervjustudie
Sammanfattning : Fysisk aktivitet beskrivs vara positiv både för den fysiska och den psykiska hälsan för personer i alla åldrar. Det finns rekommendationer för hur mycket fysisk aktivitet människor bör ägna sig åt varje dag. Idag finns även rekommendationer för fysisk aktivitet framtagna för personer som bor i särskilt boende. LÄS MER
18. Superconducting quantum circuits in a tunable electromagnetic environment
Sammanfattning : This thesis presents the results of an experimental study onsmall-capacitance Josephson junctions in a high impedanceenvironment. In small-capacitance Josephson junctions the charging energyEC=e2/2C becomes relevant at low temperature and thecharging effects influence the transport properties. LÄS MER
19. Structure and Dynamics in Liquid Battery Electrolytes
Sammanfattning : The introduction of Sony’s rechargeable lithium-ion battery in 1991 sparked a transformation of our everyday life, enabling wide-spread use of portable electronics, such as smartphones and laptops. Furthermore, in recent years the increased usage of electrical vehicles and the on-going change to transient renewable energy sources has created a large interest in cheaper, safer, more sustainable, long-lasting and energy denser batteries. LÄS MER
20. Platinum-Based Nanocatalysts for Proton Exchange Membrane Fuel Cells
Sammanfattning : Fuel cells have potential to become an integral technology in a future sustainable energy system. For transport applications, the proton exchange membrane fuel cell (PEMFC) is the most promising option, exhibiting light weight and high energy density. LÄS MER