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Image Analysis and Enhancement with Applications in Medicine
This thesis consists of six parts in which methods for image analysis and processing are studied. Two-dimensional medical images, image sequences, and three-dimensional image volumes are considered. In the first part, the concept of optical flows (OF) is employed for restoring the contracting/expanding ventricle motion in ultrasonic echocardiograms. Radial velocities obtained by a scalar approach
Strain-induced semimetal-semiconductor transition in InAs/GaSb broken-gap quantum wells
We investigate the hybridization of the electron, heavy-hole and/or light-hole dispersion relations in strained InAs/GaSb quantum wells. In the considered structures, the lowest electron level lies below several hole levels at zero in-plane wave vector k(parallel to), so that the anticrossings of subbands produce gaps in the in-plane dispersions. To calculate the electronic band structures of such
Quadratic Optimization of Motion Coordination and Control
Cigarette smoking accelerates progression of alcoholic chronic pancreatitis
Background: Smoking is a recognised risk factor for pancreatic cancer and has been associated with chronic pancreatitis and also with type II diabetes. Aims: The aim of this study was to investigate the effect of tobacco on the age of diagnosis of pancreatitis and progression of disease, as measured by the appearance of calcification and diabetes. Patients: We used data from a retrospective cohort
Treatment with a GnRH analogue: effects on hemostatic risk factors for thrombo-embolic disease
OBJECTIVE--Steroid hormones, especially estrogens, are known to affect hemostatic risk factors for thromboembolism, cardiovascular disease, and stroke. We examined these risk factors during depression of the serum estradiol concentration by a GnRH analogue. DESIGN--Patients were treated with a GnRH analogue, goserelin (Zoladex), 3.6 mg/inj monthly, for a period of 6 months. Blood samples were coll
Mönsteranalys av inomhusluft. Undersökning av luftkvaliteten i sjuka hus med flytspackelproblem
Den hälsomässiga effekten som rapporteras i samband med sjuka-hus syndromet (SBS), vars orsak är okänd, kan betraktas som ett mönster av icke specifika symptom såsom irritationer i ögon, näsa och mun, upplevelser av torra sletnhinnor och hud, hudrodnad, mental trötthet och upplevelse av svag men ihållande lukt. Aven exponeringar i inomhusluften kan beskrivas som ett mönster av en mängd olika ämnen
Traveling in Japan
This is the research report which was sent to the Japanese Society for the Promotion of Science, JSPS. It is a documentation of traveling as well as research activities, conferences, people I met, discussions, etc., during my JSPS postdoctoral fellowship at Tokyo Institute of Technology.
Rec. av Carina Burman, Bremer
Preoperative and postoperative instability in lumbar spinal stenosis
Sixty-one patients operated on for spinal stenosis, without a fusion, were studied retrospectively. Preoperative instability, as revealed by functional myelography, was found to predict a poor prognosis (P less than 0.01). Women had less favorable results (P less than 0.05). The "slipping" group was significantly more often radically decompressed than the "nonslipping" group (P less than 0.01). Po
Short-block variable-length trellis quantization
We present two methods for variable-rate trellis quantization. Both methods utilize trellis codes based on linear congruential (LC) recursions. LC code trellises have good pseudo-random properties and are easily adapted to serve reconstruction alphabets of different sizes. The first method finds an entropy-constrained code only by optimizing over a scale factor. The scale factor modifies an initia
Adolescent respiratory symptoms-girls are at risk: The Young-HUNT study, Norway
The objective was to study sex differences in adolescence regarding prevalence of asthma and current wheeze and to explore the association between respiratory symptoms and hereditary, lifestyle and socioeconomic factors. Young-HUNT included data comprehensive questionnaire on health, disease, lifestyle and social factors from 8817 teenagers 13-19 years conducted in 1995/97 (89% response rate). Que
Manganese trends in a sample of thin and thick disk stars : The origin of Mn
Context. Manganese is an iron-peak element and although the nucleosynthesis path that leads to its formation is fairly well understood, it remains unclear which objects, SN II and/or SN Ia, that contribute the majority of Mn to the interstellar medium. It also remains unclear to which extent the supernovae Mn yields depend on the metallicity of the progenitor star or not. Aims. By using a well stu
Complexes and Diffrerential Graded Modules
The main topic of the thesis is the generalization of some traditional module-theoretic homological applications to complexes of modules and to differential graded modules over differential graded rings. We introduce three possible generalizations of the classical notion of annihilator of an R-module. For linear functors D (R) -> D (R), preserving the triangulation, certain inclusion results for
High-spin spectroscopy of natural and unnatural parity states in the mirror-pair V-45/Ti-45
High-spin states in the proton-rich nucleus V-45 have been identified for the first time. A comprehensive gamma-ray decay scheme has been established following an experiment performed at the Vivitron accelerator at IReS Strasbourg by using the Euroball gamma-ray detector array coupled to the Neutron Wall and Euclides detector arrays. The natural (negative-) parity scheme is identified up to the f(
Stress vid förändring.
J-Dependent 3s4p 3PJ Lifetimes in Mg-Like Sulphur and Chlorine
Quantum-Chemical Studies of Metal Oxides for Photoelectrochemical Applications
A review of recent research, as well as new results, are presented on transition metal oxide clusters, surfaces, and crystals. Quantum-chem. calcns. of clusters of first row transition metal oxides have been made to evaluate the accuracy of ab initio and d. functional calcns. Adsorbates on metal oxide surfaces have been studied with both ab initio and semi-empirical methods, and results are presen
Differences in perinatal mortality and suboptimal care between 10 European regions: results of an international audit.
Objective A European concerted action (the EuroNatal study) investigated the background of differences in perinatal mortality between countries of Europe. The study aimed to determine the contribution of differences in quality of care, by looking at differences in the presence of suboptimal factors in individual cases of perinatal death. Design Retrospective audit study. Setting Regions of 10 E