Sökning: "alami"
Visar resultat 1 - 5 av 9 avhandlingar innehållade ordet alami.
1. Food security in a changing climate : The role of cropland intensification and land acquisitions across Africa
Sammanfattning : Food security is one of the world’s greatest challenges. The current food system shows an entanglement across the globe which means that local farmers reliant on subsistence agriculture no longer operate in isolation of larger-scale processes within the global economy or the changing biophysical system of the planet. LÄS MER
2. Plasma characterisation in high power pulsed magnetron sputtering
Sammanfattning : In this thesis, plasma parameters including plasma and floating potentials, electron energy distribution function (EEDF) plasma density and electron temperature are studied in a high power pulsed magnetron (HPPM) discharge at different Argon (Ar) gas pressures and different magnetron powers. It is reported that the EEDF during and shortly after the pulse can be represented by a bi-Maxwellian distribution indicating two energy groups of electrons. LÄS MER
3. Plasma Characterization & Thin Film Growth and Analysis in Highly Ionized Magnetron Sputtering
Sammanfattning : The present thesis addresses two research areas related to film growth in a highly ionized magnetron sputtering system: plasma characterization, and thin film growth and analysis. The deposition technique used is called high power pulsed magnetron sputtering (HPPMS). LÄS MER
4. Novel Gemini Surfactants Based on Natural Products Aggregation Behaviour in Aqueous Solutions
Sammanfattning : There is currently much interest in using natural products to obtain novel types of surfactants. One of the reasons for increasing the proportion of surfactants based on natural products and replacing products based on petroleum raw materials is the growing concern about the environment. LÄS MER
5. Thin Film Growth using Pulsed and Highly Ionized Vapor Fluxes
Sammanfattning : Microstructure and morphology of thin films are decisive for many of their resulting properties. To be able to tailor these properties, and thus the film functionality, a fundamental understanding of thin film growth needs to be acquired. LÄS MER