Search for dissertations about: "OSR"

Showing result 1 - 5 of 7 swedish dissertations containing the word OSR.

2. 1. The link between brain size, cognitive ability, mate choice and sexual behaviour in the guppy (Poecilia reticulata)

   Author : Alberto Corral López; Niclas Kolm; Janette Boughman; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; sexual selection; artificial selection; brain evolution; optomotor test; decision-making; discrimination; assessment; optimal decisions; rational choice; behavioural flexibility; expensive tissue; predation; sex ratio; OSR; maintenance of variation; etologi; Ethology;

   Abstract : Competition over access for mates has led to the evolution of many striking examples of morphological traits and behaviour in animals. The rapid development of the sexual selection field in recent decades have dramatically advanced our understanding of what traits make individuals more successful in attracting mates and how preferences for mates evolve over time. READ MORE

4. 2. Popliteal Artery Aneurysms : - epidemiology, treatment and results

   Author : Anne Cervin; Martin Björck; Mårten Falkenberg; Hans Ravn; Michelle Antonello; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Popliteal artery aneurysms; Endovascular; Open surgery; Outcome; Occlusion; Screening; Prevalence; Rupture; Surgery; Kirurgi;

   Abstract : Popliteal aneurysms (PA) are limb threatening, since the aneurysm thrombose and emboli from the aneurysm sac occlude the distal vessels, resulting in chronic or acute limb ischaemia. Open surgical repair (OSR) has been challenged by endovascular repair (ER), a minimal invasive technique. READ MORE

5. 3. Abdominal compartment syndrome and colonic ischaemia after abdominal aortic aneurysm repair in the endovascular era

   Author : Samuel Ersryd; Anders Wanhainen; Martin Björck; Khatereh Djavani; Anders Albäck; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Aortic aneurysm-abdominal; Intra-abdominal pressure; Intra-abdominal hypertension; Abdominal compartment syndrome; Rupture; Open ab-domen treatment; Colonic ischaemia; Endovascular aneurysm repair; Surgery; Kirurgi;

   Abstract : Abdominal Compartment Syndrome (ACS) and colonic ischaemia (CI) are serious and potentially lethal complications after open (OSR) and endovascular repair (EVAR) of ruptured (rAAA) and intact (iAAA) abdominal aortic aneurysms. The aims of this thesis were to investigate the incidence, outcome, and risk factors associated with ACS (Papers I-III) and to evaluate extraluminal colonic tonometry for postoperative surveillance of colonic perfusion (Paper IV). READ MORE

6. 4. Development of a Neutron Flux Monitoring System for Sodium-cooled Fast Reactors

   Author : Vasudha Verma; Carl Hellesen; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Protection systems; safety; accidents; sodium-cooled fast reactor; instrumentation; fission chamber; self powered neutron detector;

   Abstract : Safety and reliability are one of the key objectives for future Generation IV nuclear energy systems. The neutron flux monitoring system forms an integral part of the safety design of a nuclear reactor and must be able to detect any irregularities during all states of reactor operation. READ MORE

7. 5. Wideband Sigma-Delta Modulators

   Author : Xiaolong Yuan; Svante Signell; Jakob Wikner; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; sigma-delta modulator; feedforward; reconfigurable; quadrature bandpass filtering; Electronics; Elektronik;

   Abstract : Sigma-delta modulators (SDM) have come up as an attractive candidatefor analog-to-digital conversion in single chip front ends thanks to the continuousimproving performance. The major disadvantage is the limited bandwidthdue to the need of oversampling. READ MORE