Sökning: "reza"
Visar resultat 1 - 5 av 127 avhandlingar innehållade ordet reza.
1. Prevalence and Correlates of Health Risk Behaviors among High School Adolescents in Iran : With focus on Water-pipe Smoking, Suicide Ideation, Physical Activity and Nutrition
Sammanfattning : Background: Adolescence is a transitional stage from childhood into adulthood and many habits, with long-term implications for health, from this period of life can continue into adulthood. Identifying risk factors related to health risk behaviors is therefore an important part of health promotion. LÄS MER
2. Conversion of xylan into value-added products
Sammanfattning : Today’s high demand on finding sustainable energy sources, replacing petroleum-based products and the needfor healthier food alternatives have forced us to search for natural recoverable resources and explore their manyhidden applications. One such resource is xylan, which has gained much attention as possible raw material forvarious exploitations. LÄS MER
3. Supply chain optimisation and market coordinated inventory control
Sammanfattning : This thesis examines serial supply chains in a decentralised, market-basedenvironment. It tries to explain the existing world of decentralized supplychains through a novel modelling approach. The actors in the chain are independentand interact through a “Cournot” game in inventory policies (orderlevels) and pricing (mark-ups). LÄS MER
4. Improving the Dynamic Design Philosophy of High-Speed Railway Bridges Using Reliability-Based Methods
Sammanfattning : Modern railway infrastructures, especially bridges, are exposed to significant vibrations with potential safety implications. In this context, previous studies have shown the inconsistency and inadequacy of some conventional design methods necessitaing them to be improved. The assessment of safety inherently deals with uncertainties. LÄS MER
5. Reliability-Based Assessment and Optimization of High-Speed Railway Bridges
Sammanfattning : Increasing the operational speed of trains has attracted a lot of interest in the last decades and has brought new challenges, especially in terms of infrastructure design methodology, as it may induce excessive vibrations. Such demands can damage bridges, which in turn increases maintenance costs, endangers the safety of passing trains and disrupts passenger comfort. LÄS MER