Filtyp
An n-type InAs/InAsP heterostructure nanowire field-effect transistor has been fabricated and compared with a homogeneous InAs field-effect transistor. For the same device geometry, by introduction of the heterostructure, the threshold voltage is shifted 4 V, the maximum current on-off ratio is enhanced by a factor of 10 000, and the subthreshold swing is lowered by a factor 4 compared to the homo
We report on experimental transition probabilities for thirteenforbidden [Fe II] lines originating from three different metastable FeIi levels. Radiative lifetimes have been measured of two metastablestates by applying a laser probing technique on a stored ion beam.Branching ratios for the radiative decay channels, i.e. M1 and E2transitions, are derived from observed intensity ratios of forbiddenl
Background and aim Scandinavian Quality Register for Thyroid and Parathyroid Surgery is an on-line web-based database with the aim to improve the quality of thyroid and parathyroid surgery. Preliminary data from surgery for primary hyperparathyroidism are reported here. Materials and methods Fifteen departments registered 806 operations, with 639 women (79.7%) and 167 men. The median age of the pa
Objecives: To examine the short-term effect of nicotine on bone healing and osseointegration. Material and methods: Sixteen female rabbits were divided into two groups. The test group was exposed to nicotine tartrate for 8 weeks and the control group was exposed to placebo. Nicotine or placebo was administered via a miniosmotic pump and plasma cotinine levels were measured weekly. The pump deliver
This thesis is concerned with modeling of the cracking process in reinforced concrete due to imposed deformations. Cracking is investigated both at early ages, during hydration, and at mature age when the final properties of the concrete are reached. One of the most important material characteristics of the concrete at early ages, the Young’s modulus is determined by means of a dynamic method call
Green, blue, violet and ultraviolet upconversion luminescence is reported at room temperature in a YAG: 10.5% Er3+ crystal pumped by one-colour (647 nm) and two-colour (647 + 618 nm) laser excitation. The upconversion mechanism was studied by means of time-resolved luminescence spectroscopy and the energy flow pathways are described. Based on the results it appears that energy transfer upconversio
I denna rapport behandlas uppvärmning med golvvärme och hur man med datorns hjälp kan reglera ett golvvärmesystem. Rapporten innehåller också en beskrivning av olika golvvärmesystem, främst vattenburen golvvärme, samt hur värmeförlusterna i en byggnad påverkas med golvvärmesystem. De reglerprinciper som behandlas i detta arbete är framkoppling från utetemperatur, återkoppling från innetemperatur o
Detta arbete avgränsas till att behandla energianvändning i småhus. Studien omfattar tre småhus som byggts för utställningen Bo92 i Örebro. Syftet med studien är att beräkna och ta fram kunskaper om den totala energiåtgången under en byggnads hela livscykel. Användningstiden för husen är antagen till 50 år.This report deals with single-unit dwellings built in 1991 and 1992 in a city called Orebro, Sweden.The houses are prefabricated and the frameworks are made of wood. The aim of the essay is to present the total use of energy during the life-cycle of single-unit dwellings, taking their mode of construction into account. The life-cycle of a house is divided into the following periods: production (m
An obese patient with type 2 diabetes whose diet was changed from the recommended high-carbohydrate, low-fat type to a low-carbohydrate diet showed a significant reduction in bodyweight, improved glycemic control and a reversal of a six year long decline of renal function. The reversal of the renal function was likely caused by both improved glycemic control and elimination of the patient's obesit
Popular Abstract in Swedish Det övergripande området för min studie är lärararbetet. Initialt riktar jag blickarna mot lärare som verkar i den svenska grundskolan. Den övergripande forskningsfrågan lyder: Hur är lärararbetet? Även om det i grundad teori framstår som önskvärt att forskaren ska ge sig ut på fältet utan förutfattade idéer och perspektiv som tvingar data in i förutbestämda analyser, gThe aim of this study is to generate a grounded theory about the work done by teachers. The initial area of data collection was the work done by teachers in their non-regulated hours, in which the teachers are expected to carry out professional activities like planning, preparation, correcting and spontaneous contacts with students, parents and colleagues. Data was collected and analysed according
Many factors can ultimately lead to an increased blood pressure and it is a generally accepted view that an increase in the active tension of arterioles reflects an increase of the free calcium concentration in the cytosol of the vascular smooth muscle cells. Only recently, however, has the possibility been considered that blood pressure regulation could be influenced by calcium homeostasis. A bac
A Swedish translation of the Barrow Neurological Institute Screen for Higher Cerebral Functions was administered to 52 normal control subjects and 36 patients with well-documented brain dysfunction. Findings replicated those reported in American samples. Level of performance was strikingly similar between Swedish controls and American controls, especially in individuals between 15 and 39 years. Sw
Popular Abstract in Swedish Aktie- och fondsparandet bland allmänheten har ökat dramatiskt i Sverige under 1990-talet, och allt fler företag har valt börsintroducering som finansieringsform. På så sätt har frågor som rör värdepappersmarknaden fått en ökad och mer allmän relevans, inte minst när det gäller regleringen av vad som är tillåtet och otillåtet att göra på marknaden. Både från statligt håIn this dissertation the Swedish Financial Supervisory Authority's (FSA) investigation of suspected insider trading offences is examined and analysed. The aim of the study is to describe FSA's investigative activity in insider cases during the 1990?s, a period of both increased activity on the Swedish stock market as well as changed regulation. The study places the investigation of insider offence
Intrapartum death has become a rare event since the introduction of electronic fetal monitoring (EFM). Randomized studies of EFM versus intermittent auscultation show that EFM reduces the risk of low Apgar score at birth and of neonatal seizures, although it may be possible to ensure low perinatal mortality even with intermittent auscultation alone. The rate of operative deliveries may increase wi
Introduction: Vertebral fracture is a strong risk factor for future spine and hip fractures; yet recent data suggest that only 5-20% of subjects with a spine fracture are identified in primary care. We aimed to develop easily applicable algorithms predicting a high risk of future spine fracture in men and women over 50 years of age. Methods: Data was analysed from 5,561 men and women aged 50+ year
