Search for dissertations about: "åstrand"

Showing result 1 - 5 of 36 swedish dissertations containing the word åstrand.

2. 1. Chromatin structure and histone modifications in gene regulation

   Author : Carolina Åstrand; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : In the living cell, DNA is densely packed into a chromatin structure constituting nucleosomal arrays. One nucleosome core particle includes a disc shaped protein octamer consisting of pairs of histones H2A, H2B, H3 and H4. 146 bp of DNA is wrapped in almost two turns around this protein complex. READ MORE

4. 2. A Framework for optimised welding of fatigue loaded structures : Applied to gas metal arc welding of fillet welds

   Author : Erik Åstrand; Gunnar Bolmsjö; Fredrik Sikström; Heikki Remes; Högskolan Väst; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; GMAW; Fatigue; Welding procedures; Fillet welds; Weld quality; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

   Abstract : Welding is a key process for heavy steel structures, but it is also a weak link in the structure since fatigue fractures in welds are a common cause of failure. This thesis proposes several changes in order to improve the fatigue properties in acost effective way, enabling reduced weight and reduced cost of welded structures. READ MORE

5. 3. Bisphosphonates for orthopedic applications. Studies in rat models

   Author : Jörgen Åstrand; Lund Ortopedi; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; traumatology; Kirurgi; ortopedi; traumatologi; orthopaedics; Surgery; topical treatment; osteonecrosis; bone graft resorption; prosthetic loosening; Bisphosphonates; osteoclasts;

   Abstract : Prosthetic loosening, bone graft resorption and osteonecrosis are examples of problems in orthopedic surgery caused by or augmented by bone resorption. Bone resorption is caused by osteoclasts. Osteoclasts can be inactivated with biphosphonates, a drug in clinical use against osteoporosis and osteolytic tumors. READ MORE

6. 4. Energy Policy Instruments Perspectives on their Choice, Combination and Evaluation

   Author : Kerstin Åstrand; Miljö- och energisystem; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy systems; policy instrument choice; socio-technical systems; policy instrument combination; Energiforskning; Energy research; Samhällsvetenskaper; Social sciences; Sweden.; evaluation; Environmental technology; pollution control; Miljöteknik; wind energy policy; green certificate trading scheme; market creation; wind power; Public policy instruments; wind turbine development; kontroll av utsläpp; renewable energy; energy policy;

   Abstract : Abstract The thesis aims at providing a better understanding of public policy instruments used in policy-making within the energy sector, particularly regarding their role in the change towards an increased use of renewable energy sources for generation of electricity. The research was guided by an underlying assumption that a markedly higher proportion of the energy generated from renewable sources can be considerably enhanced by use of policy instruments that support the development and the market creation of new, renewable energy technologies. READ MORE

7. 5. Short-term Underground Mine Scheduling : Constraint Programming in an Industrial Application

   Author : Max Åstrand; Mikael Johansson; Christian Schulte; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; scheduling; mining; mine; underground; constraint programming; cp; large neighborhood search; lns; Electrical Engineering; Elektro- och systemteknik;

   Abstract : The operational performance of an underground mine depends critically on how the production is scheduled. Increasingly advanced methods are used to create optimized long-term plans, and simultaneously the actual excavation is getting more and more automated. READ MORE