Sökning: "material naturvetenskap"
Visar resultat 1 - 5 av 2831 avhandlingar innehållade orden material naturvetenskap.
1. Assessing Mineral Resource Scarcity in a Circular Economy Context
Sammanfattning : Due to humanity’s dependence on metal resources there are growing concerns regarding impacts related to their potential scarcity, both for current and future generations. The vision of a more circular economy suggests that extending the functional use of metals through measures aiming for resource-efficiency (RE) such as increasing technical lifetime, repairing and recycling could reduce mineral resource scarcity. LÄS MER
2. Undervisning med stöd av förproducerade material : Ett närmande av naturvetenskap i förskolan
Sammanfattning : This thesis aims to develop an understanding of the possibilities and challenges pre-produced teaching materials present to teachers and the learning opportunities children are offered in teaching that uses such materials. To do this a study of preschool teachers and children from three preschool departments in Sweden was carried out. LÄS MER
3. Kalkbruk-krympsprickor och historisk utveckling av material, metoder och förhållningsätt
Sammanfattning : I denna avhandling undersöks uppkomst av krympsprickor i puts. I undersökningen används våtsläckt sub- hydrauliska kalk. Den aktuella kalksorten har används i Sverige under 1800- och 1900-talet men också under 2000-talet i samband med putsrestaureringar. LÄS MER
4. Tunning Multicolor Light Emission in Lead-free Materials
Sammanfattning : Perovskites are a class of compounds with the general formula ABX3 and becoming increasingly attractive recently. Because this kind of material possesses various advantages such as abundant raw materials, easy synthesis, excellent photoelectric properties, and short production process. LÄS MER
5. Assessing Sustainability and Guiding Development towards More Sustainable Products
Sammanfattning : Companies need to develop more sustainable products that fit into future more sustainable markets. For this reason, the integration of sustainability considerations is needed in the early stages of product development, where a major part of the sustainability performance of a final product is determined. LÄS MER