Search for dissertations about: "helgi"

Showing result 1 - 5 of 49 swedish dissertations containing the word helgi.

  2. 1. Combustion Bowl Heat Transfer Analysis in Diesel and PPC Engines

    Author : Helgi Fridriksson; Värmeöverföring; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Heat Transfer; CFD; Internal Combustion Engine; Diesel; PPC;

    Abstract : This thesis concerns a numerical investigation on heat transfer in internal combustion engines, with the aim of increasing engine efficiency. The efficiency gains are to be extracted from reduced heat transfer losses, by increasing the knowledge on how the heat transfer process is affected by various hardware and operational parameters in the engine. READ MORE

  4. 2. On CFD-Analysis of Heat Transfer of a Heavy-Duty Diesel Engine

    Author : Helgi Fridriksson; Värmeöverföring; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; CFD; Heat Transfer; Diesel Engine;

    Abstract : In this work, a heavy-duty diesel engine was studied by employing CFD simulations on a closed volume engine segment. These simulations were used to evaluate both the effects from certain parameters on the wall heat transfer, and to examine how reduction of heat transfer would effect the engine performance and emission levels. READ MORE

  5. 3. Cancer of the Colon and Rectum : Population Based Survival Analysis and Study on Adverse Effects of Radiation Therapy for Rectal Cancer

    Author : Helgi Birgisson; Lars Påhlman; Bengt Glimelius; Ulf Gunnarsson; Ragnar Hultborn; Uppsala universitet; []
    Keywords : Surgery; cancer; colon; rectal; colorectal; survival; radiation therapy; second cancer; adverse effects; Kirurgi;

    Abstract : The Swedish Cancer Register was used to determine the relative survival rate in colon and rectal cancer and to estimate the occurrence of second cancers related to radiation therapy for rectal cancer. The Swedish Hospital Discharge Register and hospital records were used to estimate the rate of late adverse effects due to radiation therapy for rectal cancer. READ MORE

  6. 4. Learning processes in an inter-organizational context : A study of krAft project

    Author : Helgi-Valur Fridriksson; Runólfur Smári Steinthorsson; Jönköping University; []
    Keywords : ;

    Abstract : The purpose of this thesis is to understand learning in an inter-organizational learning project, focusing on the enablers and obstacles of learning. The study shows that traditionally research on organizational learning has focused on intra-organizational learning, paying attention to learning within focal organizations. READ MORE

  7. 5. Bacterial polysaccharides as substrates for D-glucuronyl C-5 epimerases in studies of glycosaminoglycan biosynthesis

    Author : Helgi H. Hannesson; Uppsala universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : .... READ MORE