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The flow characteristics in rectangular ducts with aspect ratio of 1:8 were investigated experimentally using particle image velocimetry to reveal the function of the inclined ribs as turbulators or generators of favorable flows. Circular ribs were attached on the wide walls and the rib height-to-hydraulic diameter ratio was kept as 0.06 with an attack angle of 60degrees. The obtained results show

Models of moisture flow processes in wood are normally based on a Fickian approach. In many instances, there are considerable discrepancies between modelling and experimental results. It is shown in this thesis that a major cause for these discrepancies is a so-called retarded sorption which is not accounted for in conventional theories. This retarded sorption occurs in the wood cell wall. A spec

This work deals with different types of repair methods for concrete slab on the ground damaged by moisture. Many of the available methods involve some kind of mechanical ventilation of the foundation. The basic principle for all these systems is the same. By establishing air movement through an air-permeable layer below or above the concrete slab, the flowing air can absorb moisture from surroundi

Based on a retrospective study of 19 neuropathologically verified cases with frontotemporal dementia (FTD), neuropsychiatric symptoms related to behavioral disturbances and their psychosocial consequences were studied. The results indicate that frontotemporal dementia is often misdiagnosed early in the clinical course. Behavioural features with impaired social interactions, impaired personal regul

Rainflow cycles are often used in fatigue analysis of materials for describing the variability of applied loads. Therefore, an important characteristic of a random load process is the intensity of rainflow cycles, also called the expected rainflow matrix (RFM), which can be used for evaluation of the fatigue life. In this thesis mainly two problems are addressed: the first is computation of the ex

Background Earlier reports on reduced physical performance and osteoporosis-related fractures have mostly been short-term studies. The aim of this investigation was to examine the effects of fractures on physical functioning 3 years after trauma, the latter being stratified for pain. Participants and methods The study consisted of a population-based case-control study including 289 subjects from t

A semiempirical method to characterize the pencil-beam dose kernel is presented. Results from measurements are described by mathematical models of the applicable physical processes. The measurements were made with 6 and 25 MV x-ray beams from a linear accelerator. Broad-beam notations were used consistently, and the pencil-beam quantities were obtained by differentiation. The results were compared

The history of spinal cord injuries starts with the ancient Egyptian medical papyrus known as the Edwin Smith Surgical Papyrus. The papyrus written about 2500 B.C.by the physician and architect of the Sakkara pyramids Imhotep, describes "crushed vertebra in his neck" as well as symptoms of neurological deterioration. An ailment not to be treated was the massage to the patients at that time. This f

Several new oral antidiabetic agents, known as 'gliptins' or 'enzyme dipeptidyl peptidase-IV (DPP-4) inhibitors', have been developed for the treatment of type 2 diabetes and a key clinical use of the gliptins is in combination with metformin. There are important differences in the kinetics of the interaction of different gliptins with the catalytic site of DPP-4, which may lead to varying pharmac

Neutralizing antibodies (NAb) able to react to heterologous viruses are generated during natural HIV-1 infection in some individuals. Further knowledge is required in order to understand the factors contributing to induction of cross-reactive NAb responses. Here a well-established model of experimental pathogenic infection in cynomolgus macaques, which reproduces long-lasting HIV-1 infection, was

Popular Abstract in Swedish Njurcancer är ungefär den 10:e vanligaste tumörformen i Sverige och diagnosticeras nästan dubbelt så ofta hos män som hos kvinnor. Tumörerna upptäcks vanligtvis i åldern mellan 50 och 70 år och de mest förekommande symtomen är blod i urinen och flanksmärtor. Varför man får njurcancer är inte känt, men det finns ett klart samband med rökning och asbest. Njurcancer kan up

Introduction and aims. Mental disorders among perpetrators of violent and sexual crimes differ from those in the general population in prevalence, course, and patterns of comorbidity. The Göteborg Forensic Neuropsychiatry Projects was initiated to map neuropsychiatric vulnerability factors (disorders, deficits, symptoms, and neurobiological aberrations) among violent offenders and analyze the find

Popular Abstract in Swedish Blodcirkulationen fungerar i kroppen som ett transport system för proteiner, syre och andra metaboliter. Blodet har den svåra uppgiften att vara flytande och samtidigt kunna koagulera på ställen där kärlet går sönder. Störning i denna balans leder till sjukdomar som hjärtinfarkt och blodpropp eller motsatsen svåra blödningar. Det protein som jag har studerat ingår vid The subject of this thesis is the activated protein C (APC)-mediated inactivation of factor Va. The activated form of factor V (FVa) is a procoagulant cofactor for Factor Xa (FXa) in the conversion of prothrombin to thrombin. The procoagulant function of FVa is down regulated by APC through proteolytic cleavage at three sites, Arg306, Arg506 and Arg679. The cleavage at Arg506 is kinetically favore

Popular Abstract in Swedish Olika arter av stora växtätare lever på platser spridda över nästan hela jordklotet. På många av dessa platser samlar vi människor data för att kunna skatta storleken på deras populationer. Anledningen till att detta görs varierar från plats till plats, det kan till exempel vara för att djuren är utrotningshotade, för att kunna bedriva nöjesjakt eller för att begränsa aLarge herbivores are monitored for various reasons in many areas around the world. Data from such monitoring can be of varying degree of detail and extent. Several studies have shown that we need extensive amounts of data with a high degree of detail to be able to understand anything from it. Nevertheless, data in the less detailed form of annual censuses of large herbivore densities and weather i

Popular Abstract in Swedish Insulinberoende diabetes mellitus (IDDM = Typ 1 diabetes), och kronisk sköldkörtelinflammation - autoimmun thyreoidit (AIT) anses idag vara orsakade av att de hormonproducerande cellerna angrips av kroppens eget immunsystem (sk. autoimmunitet). När sjukdomen ger sig till känna kliniskt finnes antikroppar (sk. autoantikroppar) riktade mot cellkomponenter i det hormonprodThe two most common autoimmune endocrine diseases in children are autoimmune thyroiditis (AIT) and Type 1 (insulin-dependent) diabetes mellitus (IDDM). Autoantibodies (ab) can be found several years before clinical diagnosis in both diseases. The aims of this study were to investigate the prevalence of thyroid ab in children with IDDM and in children with allergic diseases; to study islet ab and t

Popular Abstract in Swedish Genom att utsätta ett material för elektromagnetisk strålning med tillräckligt hög frekvens kan man "slå ut" elektroner. Denna mekanism, som förklarades av Albert Einstein redan 1905, går under namnet den fotoelektriska effekten och utnyttjas idag bl.a. i fotoemissionsexperiment. I dessa experiment analyserar man energin hos de utsända elektronerna och kan dra slutsatseThe present thesis is concerned with the theoretical study of x-ray photoemission spectra from clean and adsorbate-covered metal surfaces. The main tool is ab initio density functional (DFT) total energy calculations. The first part gives an overview of the theoretical treatment of x-ray photoemission with our present contributions highlighted, and an introduction to DFT theory and computational t

Popular Abstract in Swedish Artros i knäleden är en av de tio vanligaste orsakerna till smärta och funktionshinder hos vuxna. Ett av problemen med artros är att det är svårt att diagnosticera vid ett tidigt stadium. Det kan synas som förändringar på röntgen, men ofta inte förrän flera år efter att det utvecklats. Mina studier visar att det finns ett samband mellan muskelfunktion i benen och riskenThe overall purpose of this thesis was to explore the impact of exercise and functional performance on development and treatment of knee osteoarthritis in the middle aged. In this thesis, I have studied a population based cohort of middle-aged subjects (35-54 years, 42 % women) with chronic knee pain at baseline, to evaluate the longitudinal effect of muscle weakness on knee osteoarthritis develo

High testosterone levels have been associated with breast cancer. BRCA1 may function as an androgen receptor (AR) co-regulator. We aimed to examine AR haplotype-tagging single-nucleotide polymorphisms (AR htSNPs) and diplotypes in relation to in vivo androgen levels, combined OC use, CAG and GGC genotypes, and BRCA1/2/X family status in 269 young healthy women from breast cancer high-risk families

Abstract Purpose: To assess the use of periscope grafts to the superior mesenteric artery (SMA) in extending the distal sealing zone of thoracic stent-grafts. Case Reports: Three patients with ruptured Crawford type I thoracoabdominal aortic aneurysms (TAAA) and 1 patient with a symptomatic type B dissection underwent endovascular repair; the celiac trunk was intraoperatively occluded in all patie