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High-resolution calculations of merging neutron stars - III. Gamma-ray bursts

Recent three-dimensional, high-resolution simulations of neutron star coalescences are analysed to assess whether short gamma-ray bursts (GRBs) could originate from such encounters. The two most popular modes of energy extraction - namely the annihilation of and magnetohydrodynamic processes - are explored in order to investigate their viability in launching GRBs. We find that annihilation can pro

Efter festen: Om konsten att utvecklas från doktor till docent

Postdoktorns utsatta position har lyfts fram i ett antal utredningar, rapporter och debatter de senaste åren. Otydliga karriärvägar och osäkra anställningsförhållanden är några av de kritiska faktorer som identifierats och som riskerar att äventyra framtida kompetensförsörjning inom svensk forskning och utbildning. I Efter festen lyfts den ofta ohörda postdoktorala rösten fram, genom diskussion k

The Diabetes Incidence Study in Sweden (DISS): Ascertainment, risk factors, and problems with classification

Popular Abstract in Swedish Patienter med diabetes mellitus har högt blodsocker. Insulin reglerar blodsockervärdena. Redan i slutet av 1800 talet föreslogs att skulle det finnas två olika typer av diabetes, den ena beroende på bristande insulinbildning, den andra beroende på bristande insulineffekt. I början av 1900 talet utvecklades insulinframställningen. Observationer av blodsockernivåerna i blThe Diabetes Incidence Study in Sweden (DISS) registers diabetes in young adults aged 15-34 years in Sweden. This thesis aims to validate the ascertainment, methods in the classification of diabetes, and putative etiological factors such as family background, psychological stress, and BMI, that may affect the incidence of diabetes in young adults, in the DISS registry. The capture-recapture method

Svenska bokband : historisk översikt

A short illustrated history of the main types of Swedish bookbindings from the 16th to the 20th century and their masters, preceding an exhibition catalogue of modern handbound bindings.

Tacrine treatment modifies cerebrospinal fluid neuropeptide levels in Alzheimer's disease

Biochemical and histochemical studies have demonstrated a widespread deficit in the activity of acetylcholinesterase (AChE) in the brains of patients with Alzheimer's disease (DAT). Multiple disturbances in several transmitter systems have been found. The most consistent neurochemical changes in DAT are reductions in the cholinergic system. The major pharmacological approach today in DAT is based

Electron Transport in Semiconductor Nanowires

Popular Abstract in Swedish Denna avhandling behandlar tillväxt av och elektriska mätningar på halvledande nanotrådar av indiumarsenid (InAs) och kombinationer av InAs och indiumfosfid (InP). En nanotråd är som namnet antyder en tunn solid tråd, som påminner om ett hårstrå fast med en diameter på typiskt 50 nm (en nanometer är en miljarddels meter, 10^-9 m) och längden kan vara allt från 100 nm upIn this thesis, semiconductor nanowires are studied from the point of view of growth and electrical properties. The growth of nanowires is done by chemical beam epitaxy (CBE), an ultra-high vacuum technique allowing a precise control of precursor deposition and low growth rates. In conventional epitaxy, growth is usually two or three- dimensional, depending on growth conditions and material combin

Stratified Sensor Network Self-Calibration From TDOA Measurements

This paper presents a study of the sensor network calibration time-difference-of-arrival (TDOA) measurements. Such calibration arise in several applications such as calibration of (acoustic or ultrasound) microphone arrays, bluetooth arrays, and radio antenna networks. We propose a non-iterative algorithm that apply a three-step stratification process, (i) using a set of rank constraints to determ