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Automatic segmentation of organs and tissues in computed tomography (CT) images can aid clinicians in anatomical contextualization for planning surgery or dosimetry. CT scans can cover varying axial ranges of the body. This thesis aims to develop a neural network based on vision transformers for segmenting organs and tissues in CT images of arbitrary axial ranges. Two models are presented, one bas
This thesis explores the classification of savannah trees using EnMAP hyperspectral and Sentinel-2 multispectral satellite data using a Random Forest classifier. The study aimed to assess if the increase in spectral information from the hyperspectral data gives an increase in classification performance, to find the advantages and limitations to hyperspectral data compared to multispectral data and
With rapidly developing digitalization and the growing popularity of online learning platforms, understanding the psychological drivers behind user loyalty has become increasingly critical. This thesis investigates how Flow Experience, defined as a deep state of intense enjoyment, focus, and concentration, shapes user satisfaction and user attitudinal loyalty in the context of online learning
Companies face the strategic challenge of expanding into adjacent markets or areas. This often requires a choice between building internally, acquiring through purchases, or forming partnerships to address the opportunity. While extensive literature exists on each of these options individually, there is limited research on the decision-making process that evaluates all these alternatives collectiv
Problem background and research problem: Previous research has shown that demographic characteristics of corporate executives can influence financial decision-making. According to Upper Echelons Theory, factors such as gender, age and experience play a role in shaping strategic decisions. However, research on the role of CFOs remains limited, especially within capital-intensive industries like the
AIMS/HYPOTHESIS: The incidence of type 1 diabetes increased during the pandemic in various countries. SARS-CoV-2 infections may trigger the development of type 1 diabetes, but the evidence is inconclusive. This study aimed to assess trends in type 1 diabetes incidence between 2007 and 2023, and to quantify the association between SARS-CoV-2 infections and the risk for developing type 1 diabetes.ME
Purpose: The purpose is to retrospectively investigate how the addition of prior and concurrent mammograms affects wide-angle digital breast tomosynthesis (DBT) screening false-positive recall rates, malignancy scoring, and recall agreement. Approach: A total of 200 cases were selected from the Malmö Breast Tomosynthesis Screening Trial. They consist of 150 recalled cases [30 true positives (TPs),
A search for neutral long-lived particles (LLPs) decaying in the ATLAS hadronic calorimeter using 140 fb−1 of proton-proton collisions at s = 13 TeV delivered by the LHC is presented. The analysis is composed of three channels. The first targets pair-produced LLPs, where at least one LLP is produced with sufficiently low boost that its decay products can be resolved as separate jets. The second an
Eftersom Storbritannien efter mer än 30 år sedan CISG:s ikraftträdande fortfarande inte har anslutit sig till konventionen, frågan uppstår om varför så är fallet. Kan det vara så att det till en viss del kan bero på skillnader angående hur den engelska tillämpliga lagen ifråga och CISG ställer sig till skyldigheten att betala skadestånd? Syftet med uppsatsen är att klargöra de likheter och skillnaSince the U.K. after more than 30 years from the CISG’s enforcement still has not adopted the Convention, the question arises; how come? Could it be that this partially is due to differences in how the English applicable law and the CISG addresses liability for damages? The objective of this paper is to elucidate the similarities and differences in the two laws, regarding the seller’s obligation t
The calcipotriol/betamethasone dipropionate two-compound product Dovobet (R)/Daivobet (R)/Taclonex (R)(LEO Pharma A/S, Ballerup, Denmark) has been shown to be safe and effective in the treatment of psoriasis for up to 8 weeks. As psoriasis is a chronic disease, long-term treatment may be required, so there is a need to investigate the safety of its use over a longer period of time. To investigate
Background: Obesity has been proposed as a risk factor for pancreatic cancer. Methods: Pooled data were analyzed from the National Cancer Institute Pancreatic Cancer Cohort Consortium (PanScan) to study the association, between prediagnostic anthropometric measures and risk of pancreatic cancer. PanScan applied a nested case-control study design and included 2170 cases and 2209 control subjects. O
Background: Erectile dysfunction is associated with, and may be the first sign of coronary artery disease. We aimed to assess whether men with erectile dysfunction but without cardiovascular disease have reduced coronary flow reserve, as a sign of early coronary atherosclerosis. Methods: We investigated 12 men aged 68-73 years with erectile dysfunction, and 12 age-matched controls. Erectile functi
Detailed quantitative analysis of the vulnerability of different hippocampal and striatal neurons to global forebrain ischemia has not previously been performed. Here we have studied the survival of immunocytochemically identified neurons using an unbiased stereological method in rats subjected to global forebrain ischemia for 30 min and sacrificed 48 h, 1 week or 4 weeks thereafter. Within the hi
Objective To determine the pharmacodynamic properties of a new oral lyophilisate formulation of desmopressin (in single doses of 30, 60, 120, 240, 360 or 480 mu g) in children with known primary nocturnal enuresis (PNE) and thus identify those dosages that could provide a duration of action corresponding to a typical length of night-time sleep in children with PNE; additional objectives were to de
Background: Osteocalcin (OC) is produced by osteoblasts during bone formation, and circulating OC has been used in clinical investigations as a marker of bone metabolism. OC is excreted into urine by glomerular filtration and can be found in urine as midmolecule fragments. Methods: We developed and evaluated three immunoassays (U-MidOC, U-LongOC, and U-TotalOC) for the detection of various molecul
Serious psychopathology in adulthood may be associated with disturbed foetal brain development, which potentially shows lingering “fossil marks” in the cranial and facial regions. Several methods exist for assessing external craniofacial and internal brain distances but, to our knowledge, no method yet provides simultaneous measurement of cranial, facial and brain dimensions in live subjects. In t
Patients with anaplastic thyroid carcinoma can rarely be cured, but every effort should be made to prevent death due to suffocation. Between 1984 and 1999, 55 consecutive patients with anaplastic thyroid carcinoma were prospectively treated according to a combined regimen consisting of hyperfractionated radiotherapy, doxorubicin, and when feasible surgery. Radiotherapy was carried out for 5 days a
The Loess Plateau in China constitutes in important source area for both water and sediments to the Yellow River. Thus, improved prediction techniques of rainfall may lead to better estimation of discharge and sediment content for the Yellow River. Consequently. the objective of this study was to establish better links between rainfall of the Loess Plateau in China and sea surface temperature (SST
