In this paper we investigate the performance of a Fourier based algorithm for fast subpixel shift determination of two mutually shifted images subjected to noise. The algorithm will be used for Shack-Hartmann based adaptive optics correction of images of an extended object subjected to dynamical atmospheric fluctuations. The performance of the algorithm is investigated both analytically and by Mon

Popular Abstract in Swedish För att ge en god omvårdnad behövs kunskaper om ätproblem som helhet och om möjliga hinder för optimalt näringsintag hos äldre patienter, särskilt de med stroke. Sådana kunskaper behövs eftersom åldrandet i sig självt eller tillsammans med sjukdom, t.ex. stroke och dess följder, kan påverka förmågan att äta och därmed också näringsintaget med ökad risk för såväl undernäThe aim of this thesis was to describe eating difficulties and interventions to improve eating among elderly patients, especially those with stroke, to make comparisons between patients with dysphagia and those without (Papers I & II), those with and without assisted eating (Paper IV), and to analyse the relation between eating difficulties, nutritional status (Papers II-V), pressure ulcers (P

The first unifying definition for the metabolic syndrome was proposed by WHO in 1998. In accordance to this, patients with type 2 diabetes mellitus or impaired glucose tolerance have the syndrome if they fulfil two of the criteria: hypertension, dyslipidaemia, obesity/abdominal obesity and microalbuminuria. Persons with normal glucose tolerance (NGT) should also be insulin resistant. About 40% of

If a proper gold standard is not available, then the predictive value of a test cannot be estimated. In this paper the concept of etiologic predictive value (EPV) is introduced. It is a quantity that will yield the predictive value of a test to predict presence of a specified disease in situations for which no proper gold standard is available. This is achieved by using information obtained from a

Popular Abstract in Swedish Den moderna genetiken tar sin början kring sekelskiftet 1900 då de mendelska lagarna återupptäcktes. Den tidiga utvecklingen skedde i många länder i nära anslutning till den praktiska växtförädlingen, så även i Sverige där det redan fanns en framgångsrik växtförädling genom Sveriges utsädesförenings verksamhet i Svalöf. Här introducerade botanisten Herman Nilsson-Ehle mIn the first part of the 20th century genetics developed into an important research field. The aim of this study is to follow and analyse the transformation of genetics from its origin within an agricultural context to an academic discipline in Sweden (ca. 1900-1960). Mendelism was introduced as a methodology in plant breeding at the plant breeding station in Svalöf during the first decade of the

Popular Abstract in Swedish Akut bukspottkörtelinflammation (akut pankreatit ? AP) är en akut inflammation som kan resultera i en självdestruktiv process i bukspottkörteln. 70-80 % av fall med AP klassificeras som lätta-måttliga och är självbegränsande, medan cirka 20 % klassas som svåra och karakteriseras av utvecklingen av nekros (vävnadsdöd) i bukspottkörteln och omkringliggande vävnad, utvecklIn acute pancreatitis (AP), lung injury is an early occuring and important part of the multiple organ dysfunction syndrome. The mechanisms underlying the development of lung injury though still largely remains unclear. The aim of the present study was to study mechanisms of the systemic and secondary pulmonary inflammation and injury, with an emphasis on the involvement of immune cells, inflammato

In this paper we introduce two new methods for solving binary quadratic problems. While spectral relaxation methods have been the workhorse subroutine for a wide variety of computer vision problems - segmentation, clustering, image restoration to name a few - it has recently been challenged by semidefinite programming (SDP) relaxations. In fact, it can be shown that SDP relaxations produce better

The basic underlying mechanisms behind atrial fibrillation (AF), the most abundant therapy demanding cardiac dysrhythmia, have until recently being largely unknown. Once established, AF is not only self-perpetuating but also self-destructive, prompting rapid treatment against possible initiating mechanisms. Recent observations reveal that the ectopic beats, initiating AF, often originate in the wa

In this paper a new wave splitting is suggested that simplifies the analysis of wave propagation in reciprocal bi-isotropic media. Two different methods to solve the scattering problem are analyzed: the invariant imbedding and the Green function approach. The medium is modeled by constitutive relations in the time domain (time convolutions) and the slab is assumed to be inhomogeneous with respect

An increasing incidence of testicular cancer has been reported from several countries in the Western world during the last decades. According to current hypothesis, testicular cancer is initiated during the fetal period, and exposure to endocrine disruptors, i.e., xenoestrogens, has been of concern. In this investigation we studied the concentrations of the sum of 38 polychlorinated biphenyls (PCB

Popular Abstract in Swedish Tidigare trodde man att den vuxna hjärnan inte hade någon förmåga att nybilda nervceller. Detta skulle innebära att nervceller aldrig blev ersatta om de skadades eller dog. Nu vet man däremot att den vuxna hjärnan fortfarande producerar nya nervceller från särskilda moderceller, s.k. stamceller, belägna i åtminstone två områden i hjärnan: subgranulära zonen i hippocamThe adult brain constantly produces new neurons from endogenous neural progenitor cells located in at least two regions, the subgranular zone (SGZ) in dentate gyrus of the hippocampus, and the subventricular zone (SVZ). Major efforts are underway to discover the functional significance of new neurons in the adult brain. Several studies have indicated a relationship exists between newborn hippoca

Popular Abstract in Swedish Moraxella catarrhalis är en human luftvägsbakterie som ofta koloniserar de övre luftvägarna och som orsakar mellanöroninfektion hos barn. Bakterien associeras även med bihåleinfektion, laryngit och nedre luftvägsinfektioner främst hos vuxna med underliggande sjukdomar som kronisk obstruktiv lugninflammation. Forskningen fokuserar främst på moraxellas ytexponerade antigeMoraxella catarrhalis is now an established human pathogen that frequently colonizes the upper respiratory tract causing most importantly otitis media in children. It has also been associated with sinusitis, laryngitis and lower respiratory tract infections in adults with predisposing conditions such as chronic obstructive pulmonary disease (COPD). Current research mainly focuses on surface antige

High energy photon colliders (gammagamma,gammae) are based on e(-)e(-) linear colliders where high energy photons are produced using Compton scattering of laser light on high energy electrons just before the interaction point. This paper is a part of the Technical Design Report of the linear collider TESLA.(1) Physics program, possible parameters and some technical aspects of the photon collider a

A molecular understanding of volatile anesthetic mechanisms of action will require structural descriptions of anesthetic–protein complexes. Porcine odorant binding protein is a 157 residue member of the lipocalin family that features a large β-barrel internal cavity (515 ± 30 Å3) lined predominantly by aromatic and aliphatic residues. Halothane binding to the β-barrel cavity was determined using f

A mixed amphiphilic system composed of the anionic surfactant Aerosol OT (AOT), in water forming a lamellar phase, to which is added a neutral noninteracting polymer, poly(N,N-dimethylacrylamide), is studied experimentally by SAXS, H-2 NMR, and microscopy, in a range of surfactant and polymer compositions. Addition of the polymer produces a decrease in the lamellar spacing, the decrease by the pol

Background: Reduced quadriceps strength is an early finding in subjects with knee osteoarthritis, but it is not clear whether it is a cause or a consequence of knee osteoarthritis. Objective: To determine whether reduced functional performance in the lower extremity predicts the incidence or progression of radiographic knee osteoarthritis. Design: Prospective, epidemiological, population based c