We have studied the (110) GaAs surface of a structure containing ortho twins by cross-sectional scanning tunnelling microscopy and we have compared the experimental results with ab initio density functional theory calculations and STM simulations. Both experimentally and theoretically we find that the surface of different twin crystallites are significantly displaced with respect to each other, pa

Objectives. Objective signs of autonomic dysfunction (AD) have been reported in patients with primary SS (pSS) while the presence of associated symptoms has not been systematically studied. Therefore, the aims of this study were (i) to assess the presence and severity of various AD symptoms in pSS patients and (ii) to relate AD symptoms to other clinical features of pSS. Methods. Thirty-eight pSS

Abstract in Undetermined Heimann, M., Nordqvist, E., Rudner, M., Johansson, M. & Lindgren M. (2013). Associative learning measured with ERP predicts deferred imitation using a strict observation only design in 14 to15 month old children. Scandinavian Journal of Psychology 54, 33-40. Deferred imitation (DI) is an established procedure for behavioral measurement of early declarative-like memorie

A highly efficient anode for glucose biofuel cells has been developed by a combination of pyranose dehydrogenase from Agaricus meleagris (AmPDH) and cellobiose dehydrogenase from Myriococcum thermophilum (MtCDH). These two enzymes differ in how they oxidize glucose. AmPDH oxidizes glucose at the C(2) and C(3) carbon, whereas MtCDH at the C(1) carbon. Both enzymes oxidize efficiently a number of ot

Sepsis and invasive bacterial infection is a major cause of human disease and death worldwide. Streptococcus pyogenes is one of the major pathogens responsible for bacterial infections, which range from mild to severe and life threatening conditions. S. pyogenes contains a cell wall anchored M protein, which is an important virulence factor that can interact with many cells of the immune system. O

Popular Abstract in Swedish Introduktion Aggressivt antisocialt beteende utgör en stor utmaning för dagens samhälle, och undersökningar av vad som ligger bakom ett återkommande sådant beteende behövs för utvecklingen av våldspreventiva insatser. Syften & Metod Syftet med avhandlingen var att identifiera faktorer som samvarierar med återkommande aggressivt antisocialt beteende. De specifika måIntroduction Aggressive antisocial behavior is a major challenge to society, and studies on the determinants of its persistence are essential to the development of strategies to prevent violence. Aims & Methods The overall aim of the thesis was to establish covariates of persistent aggressive antisocial behavior in a population-based cohort and in clinically evaluated, prospectively followed,

Background: Reliable, valid, and easy-to-administer instruments to identify possible caseness and to provide proxies for clinical diagnoses are needed in epidemiological research on child and adolescent mental health. The aim of this study is to provide further validity data for a parent telephone interview focused on Autism - Tics, Attention-deficit/hyperactivity disorder (AD/HD), and other Comor

The expansion of wind power in Sweden has brought increasing conflicts between the wind power industry and the interests of the military forces. This paper analyses the reasons for these perceived conflicts and suggests solutions for mitigating at least some of the problems. The analysis is based on literature studies, several semistructured interviews and workshops with stakeholders in Sweden, De

The molecular mechanisms by which the black eumelanin biopolymers exert their photoprotective action on human skin and eyes are still poorly understood, owing to critical insolubility and structural heterogeneity issues hindering direct investigation of excitation and emission behavior. Recently, we set up strategies to obtain water-soluble 5,6-dihydroxyindole (DHI)-based polymers as useful models

We have studied the growth of doped InAsyP1-y (InAsP) NWs and InAsP-InP core-shell NWs. Using hydrogen chloride (HCl) we were able to prevent radial growth on the InAsP NWs. Undoped and H2S-doped InAsP NWs had almost pure wurtzite crystal structure, while DEZn-doped NWs showed wurtzite periodically separated by short sections of pure zincblende with rotational twins. Electrical measurements confir

It has been a common practice both in Sweden and worldwide to enclose nuclear reactors with prestressed concrete structures. The prestress level decreases with time from its initial value due to various degradation mechanisms. To ensure that the prestress level is sufficient the tendon force is measured at regular in-service inspections. The intention with this paper is to present a reliability-ba

The analysis of annual extremes of hydrological and meteorological variables is frequently complicated by the presence of gaps in record, and when records are not only fragmented but also short, it is necessary to utilize to the full the information contained in them. One method is to abstract for statistical analysis all extreme events whose peaks exceed a pre-selected threshold value, but the th

Popular Abstract in Swedish Under de senaste decennierna har matematisk modellering av finansiella marknader rönt stor uppmärksamhet både inom akademi och inom industri. Ett område som har visats särskilt intresse är prissättning av finansiella instrument så som optioner. En europeisk köpoption på en underliggande aktie är ett kontrakt som ger innehavaren rätten att vid en förutbestämt tidpunkt, The first part of this thesis deals with approximations of stochastic integrals and discrete time hedging of derivative contracts; two closely related subjects. Paper A considers the problem of approximating the value of a Wiener process. The discretization points are placed at times when the absolute difference between the value of the process and the approximation reaches a threshold level. It i

Systemic lupus erythematosus (SLE) is an autoimmune connective tissue disease that can affect the central nervous system. Neuropsychiatric symptoms are found in 25-70% of patients. Using diffusion tensor imaging (DTI) various studies have reported changes in white matter integrity in SLE patients with neuropsychiatric symptoms (NPSLE patients). The purpose of this study was to investigate, if regi

The prevalence of troublesome fear of childbirth (FOC) in Western countries is about 20%, of which approximately 6-10% suffer from severe FOC that impacts daily life. The countries of Sweden and Denmark are quite alike as far as childbirth culture is concerned. However, to some extent they differ in the organisation of midwifery care during the antenatal and labour period, respectively, and this m

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