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Popular Abstract in Swedish Kognitiv funktion är ett samlingsbegrepp för minne och högre tankeprocceser. Nedgången i dessa verbala, logiskt-induktiva, spatiala och minnes funktioner ses både vid normalt åldrandet och sekundärt till demens, stroke och åldersrelaterad minnesstörning. Förändringar i dessa funktioner kan vara ett tidigt tecken på vaskulärt (kärl-relaterad) betingad sjukdom eller degenThe importance of early detection of brain changes during ageing has been recognised. Single photon emission computed tomography (SPECT) is a method used for estimation of cerebral blood flow (CBF) in clinical work and in research. The aim of thesis was to study CBF in demented and non-demented elderly persons with special reference to blood pressure changes. Elderly women with senile dementia of

Sverige är ett utpräglat småföretagarland och mätt i antal bedrivs en klart övervägande del av företagen som enskild näringsverksamhet. Till skillnad från aktiebolag och andra juridiska personer, som hänför alla inkomster till inkomstslaget näringsverksamhet, ska inkomster eller utgifter för fysiska personer hänföras till endera av inkomstslagen näringsverksamhet, tjänst eller kapital. AvhandlingeSweden is a typical small-business country and, based on the numbers, a clear majority of the companies operate as sole traders. Unlike limited companies and other legal entities, which classify all income as business income, the income or expenditures of private persons are classified as either business, service or capital income. The main objective of this thesis is to systematically examine the

This dissertation deals with physical bounds on scattering and absorption of acoustic and electromagnetic waves. A general dispersion relation or sum rule for the extinction cross section of such waves is derived from the holomorphic properties of the scattering amplitude in the forward direction. The derivation is based on the forward scattering theorem via certain Herglotz functions and their as

Popular Abstract in Swedish Skogs- och pappersindustrin är några av Sveriges mest betydande industrier. Mycket av det producerade pappret används till förpackningar och papper har under lång tid varit det dominerande materialet i förpackningsindustrin; en annan viktig industri i Sverige. På senare år har dock pappersindustrin utsatts för hård konkurrens från plastindustrin när det gäller material The paper and packaging industry is a major and important industry in Sweden. The industry is capital intensive with a large investment base and long cycles for renewal and replenishment of machine platforms and other production equipment. Thus, the paper/packaging industry traditionally has a technical product oriented view and product development in the industry is partly made and understood in

In the thesis, three-dimensionally confined resonant tunneling structures were studied experimentally. Two approaches were used for obtaining quantum confinement: gate-defined lateral constriction of double barrier structures, and epitaxial growth of self-assembled quantum dots. In addition, the thesis deals with the basic development of large-area double barrier resonant tunneling diodes, as a st

Crowded field photometry is a powerful method to investigate stellar evolutionary processes in astrophysically interesting regions such as nearby external galaxies and globular cluster cores. While detectors are approaching the physical limits for photon detection, data analysis methods for crowded stellar fields are not yet equally sophisticated. In order to obtain high accuracy of measurements

Popular Abstract in Swedish Polymerer finns överallt i naturen, till exempel i form av stärkelse, cellulosa, DNA. Människan har också skapat syntetiska polymerer som bland annat används i plaster, färger, och kläder. Potatisstärkelse används bland annat i matlagning. En liten mängd stärkelse får en sås att tjockna. Allmänt används vattenlösliga polymerer mycket ofta som förtjockare eller gelbildar

Popular Abstract in Swedish Astma och allergisk rinit (hösnuva) är vanligt förekommande sjukdomar som karakteriseras av inflammation i luftrörs- och nässlemhinnor och ökad produktion av inflammatoriska proteiner t.ex. cytokiner. Cytokiner är små proteiner som fungerar som kemiska signaler mellan celler i kroppen och styr bl.a. inflammationer. Inflammation är kroppens normala försvarsreaktion mot v

BACKGROUND: Porcine embryonic neural tissue transplanted intracerebrally could potentially relieve the symptoms of Parkinson's disease if the immune response toward the graft could be overcome. However, conventional immunosuppressive treatments have proven inefficient in preventing rejection. An alternative is blocking the costimulatory signals for lymphocyte activation. Treatment with cytotoxic T

Introduction: Fenestrated aortic stent-grafts are increasingly being used to treat patients with juxtarenal abdominal aortic aneurysms (AM). Sizing of these stent-grafts is critical to ensure success and requires detailed expert assessment of aortic morphology. At present little is known about how sizing of these stent-grafts varies between observers and the necessary tolerances involved to ensure

Background When acute coronary syndrome (ACS) cannot be ruled out, emergency department (ED) patients with chest pain are admitted for in-hospital observation because of the risk of complications such as arrhythmia and acute heart failure. A study was undertaken to compare the ability of three risk prediction models to identify patients at a very low risk of complications. Methods 559 consecutive

Popular Abstract in Swedish I vår kropp genereras konstant ett stort antal nya blodceller för att ersätta de som går förlorade. Olika sorters blodceller är ansvariga för att transportera syre till alla våra vävnader, hjälpa till med blodets koagulering vid skador och att slåss mot infektioner orsakade av bakterier och virus. All blodceller härstammar från en liten population med blodstamceller somHematopoiesis is the process of blood formation from a limited pool of hematopoietic stem cells (HSCs). These rare stem cells can both self-renew to maintain the HSC pool, and differentiate to continuously replenish lost blood cells. The mechanisms of HSC regulation are not fully known. The aim of this thesis was to study the role of the Hippo signaling pathway in HSCs. The Hippo pathway is a newl

Context: Late-onset hypogonadism (LOH) has recently been defined as a syndrome in middle-aged and elderly men reporting sexual symptoms in the presence of low T. The natural history of LOH, especially its relationship to mortality, is currently unknown. Objective: The aim of this study was to clarify the associations between LOH, low T, and sexual symptoms with mortality in men. Design, Setting, a

Popular Abstract in Swedish Kroppens immunförsvar består av röda och vita blodceller som alla härstammar från blodbildande stamceller i benmärgen. Stamcellerna har den unika egenskapen att kunna producera alla typer av blodceller och upprätthålla produktionen hela livet ut. I princip all blodbildning (hematopoes) sker i benmärgen, förutom för T celler. Dessa är vita blodceller som produceras i thyhe hematopoietic development is a highly dynamic but tightly regulated process. The flexibility to produce blood cells through more than one route will allow the blood system to respond rapidly in stress situations such as infections. On the other hand, regulation of the blood system is required to prevent blood cells from uncontrolled proliferation that could result in leukemia or bone marrow fai

The problem of fitting models to measured data has been studied extensively, not least in the field of computer vision. A central problem in this field is the difficulty in reliably find corresponding structures and points in different images, resulting in outlier data. This thesis presents theoretical results improving the understanding of the connection between model parameter estimation and pos

This thesis is mainly concerned with the intersection between ideals and (maximal commutative) subrings of graded rings. The motivation for this investigation originates in the theory of C*-crossed product algebras associated to topological dynamical systems, where connections between intersection properties of ideals and maximal commutativity of certain subalgebras are well-known. In the last few