Sökning: "godkänd"
Visar resultat 16 - 20 av 1931 avhandlingar innehållade ordet godkänd.
16. Sulphide oxidation, oxygen diffusion and metal mobility in sulphide-bearing mine tailings in Northern Sweden
Sammanfattning : Large quantities of sulphide-bearing mining wastes produced from ore processing are deposited throughout the world. Sulphide oxidation in the wastes may release acidic water with high concentrations of metals to the environment. Remediation strategies are usually site specific, since the physical and chemical properties of the wastes vary. LÄS MER
17. Offentliga storkök i det gröna folkhemmet : diffrakterade berättelser om hållbar utveckling
Sammanfattning : Det är nu 20 år sedan Brundtlandskommissionens rapport kom ut, och begreppet hållbar utveckling fick sin stora spridning och inter¬nationella uppmärksamhet. Nu, våren 2007, är begreppet inte omdiskuterat på samma sätt som det en gång var, idag är det i stället begrepp som ”klimathotet” som debatteras och får rubriker. LÄS MER
18. Charge dynamics in tumbling mills : simulation and measurements with an in-mill sensor
Sammanfattning : Grinding is a process of reducing the particle size distribution of an extracted ore commonly performed in tumbling mills. The process is complex with many factors affecting the result, predominately the ores physical and chemical properties. LÄS MER
19. Material modelling for simulation of heat treatment
Sammanfattning : Heat treatment of materials is a fundamental metallurgical process. Materials are subjected to heat treatment to relieve internal stresses, reduce brittleness and to improve machinability. The properties of materials can also be altered such as hardness, strength, toughness, and wear resistance to suit particular applications. LÄS MER
20. Simulation of welding and heat treatment : modelling and validation
Sammanfattning : Many aerospace components with complex geometry are fabricated from smaller parts using joining techniques such as welding. Welding and the heat treatment which usually follows, can result in unwanted deformation and stresses. LÄS MER