Filtyp
Analysis of rail capacity - Investigation of capacity limits Västkustbanan was first recognized by the Swedish Parliament over 50 years ago, when it was decided that the entire route would be equipped with phased out double-track extension. The main purpose was to cope with the future traffic development, along the railway corridor. Since the decision was made, the phased out double-track extensio
Alternative 13-meter roads (2 +1 roads) has recently become a major part of the Swedish road network, in 2008 there were around 1280 km of 2 +1. Since these roads have major downsides for the vulnerable road users, it is important to review the design of the places where the vulnerable road users have to cross the road. The traffic is affecting both environment and humans at three levels, local, r
Principen om fri överlåtbarhet av aktier är central visavi idén om aktiebolaget som kapitalassociation och tjänar nyttiga syften. Dock finns goda skäl för undantag, varför överlåtelseförbehåll får nyttjas antingen i bolagsordning eller i aktieägaravtal. Rättsverkningarna skiljer sig väsentligt, men det finns för och nackdelar med en reglering vad gäller båda instituten. I svensk rätt accepteras
Sedan 1990 och fram till 2009 har en tredjedel av Sveriges biblioteksfilialer lagts ned. Vårt arbete syftar till att studera orsakerna till varför den successiva nedläggningen av folk- och filialbibliotek sker, en frågeställning utan entydiga svar. I arbetet diskuteras olika tänkbara orsaksfaktorer, fokus ligger dock på en fallstudie av Växjö kommuns omstrukturering av sin biblioteksverksamhet. Vi
This study discusses the image of Sweden and Swedish society in Swedish-language instructional material used in the Swedish-language course for immigrants (S.F.I.). As such, the main source material for this study has been different textbooks used as instructional material in the S.F.I. course from 1967-2005. Theoretically, this study takes its inspiration from the branch of discourse analysis kno
Introduction and aim: In SPECT imaging, the finite spatial resolution of the imaging system leads to a blurring of the reconstructed image. Consequently, counts originating from each point in the source distribution will be spread out over a volume in the reconstructed image, leading to spill-over of counts between different structures and distortion of the apparent activity concentration. This pr
Introduction: The purpose of this study was to develop a technique for automatic segmentation based on Fourier descriptors for separating smooth objects from the background in SPECT-images. The aim of the segmentation method was to be able to automatically outline kidneys in SPECT-images of patients undergoing radionuclide therapy with 177Lu-DOTATATE. The potential advantage of combining SPECT- an
Purpose: The main purposes of this study is to a) evaluate the suitability of a Varian aS1000 EPID as a safe quality assurance device for control of machine specific parameters, such as linac output, beam quality and beam symmetry, and b) to investigate the usefulness of the SPC concept for evaluation of the obtained data. Method and Materials: Measurements were performed using a Varian Clinac 23
Radiochromic film, polymer gel and radiochromic plastic are three different kinds of dosimeters developed for radiation therapy. Even though all three types of dosimeters are suitable for optical scanning, the proposed readout method is different for each detector system. In this study, the scanning properties of three optical CT scanners were investigated to determine if they could be developed i
Diffusion MRI is an imaging technique capable of inferring information about the tissue microstructure, based on magnetic resonance imaging (MRI). Diffusion MRI data can be analysed using tractography, a tool able to represent the structure of the white matter (WM) in the brain. Tractography is commonly used qualitatively, but in this report, an algorithm for quantitative tractography was develope
Diffusion tensor magnetic resonance imaging (DT-MRI or DTI) is an imaging technique that is sensitive to the diffusion movement of water contained in tissue. It is used to quantify parameters such as the diffusivity and its directionality. Because diffusion is intimately connected to the tissue microarchitecture DTI is one of the few techniques that can quantify tissue microstructure non-invasivel
Breast tomosynthesis (BT) is a new X-ray modality that reconstructs the breast volume in many slices instead of, as in mammography, showing a single 2D projection of the breast. The slice thickness is typically 1 mm for clinically used BT-units. In screening the review of breast images with BT takes two to four times longer than the review of mammography images. In an effort to reduce the review t
Introduction: Arterial spin labelling (ASL) is a non-invasive magnetic resonance imaging (MRI) technique for assessment of perfusion. ASL uses magnetically labelled blood water as a diffusible endogenous tracer to measure the perfusion of brain tissue, i.e. the cerebral blood flow (CBF). Traditionally, ASL samples images at a specific point in time allowing the CBF to be calculated using a model o
The purpose is to investigate whether the correlation between equity returns and changes in CDS spreads is stronger for sub-investment grade companies than for investment grade companies in the European iTraxx indices.
The thesis is an attempt to investigate the use of “informal justice as a political method” ( or “IRPM” in short) by the two Swedish right-wing organizations “info14/Fria Nationalister” and “Svenska motståndsrörelsen” using the organizations’ own web-published material for the period of 2000-2009, and to put the organizations’ use of “IRPM” into a Swedish empirical context. The thesis goes about
Near Field Communication (NFC) is a form of wireless communication technology enabling data transfer by putting two devices close to each other. The main idea behind NFC is to integrate wireless payment and tag reading in mobile phones along with peer-to-peer communication. An example of the benefit with NFC peer-to-peer communication is that it gives the possibility to quickly set up a Bluetooth
The Single Molecule Spectroscopy Group at the department of Chemical Physics in the Chemical Centre of Lund University conducts research involving spectroscopy on single molecules of organic dyes. Fluorescence microscopy using a wide-field scheme has been used and such a scheme has many advantages such as full image capture at once when using a high sensitivity CCD or CMOS camera. Using different
An engineer always strive to help in the continuous exploration of the unknown. By doing so we go further out in space and further down in scale. This is the case with microfluidics which in the last years have gotten a lot of attention. This thesis will examine and better try to understand and optimize a fluidic system that uses ultrasonic trapping. Its application may be everything from enrichin
In this Master's thesis I present a means of finding active sources of cortical electrical activity from electroencephalogram (EEG) data acquired during operation of a brain-computer interface (BCI). A novel subspace-based technique was used to suppress spatially correlated EEG interference sources, followed by a technique that estimates the source parameters with a near maximum likelihood per
