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Enhanced characterization of non-metallic inclusions in ultra-high-strength steels using advanced synchrotron-based X-ray absorption spectroscopy and chemometric analysis

This study leverages synchrotron radiation-based X-ray absorption photoemission electron microscopy (X-PEEM) to investigate non-metallic inclusions (NMIs) in ultra-high-strength steels. By acquiring Ca-L2,3-edge X-ray absorption spectra from six NMIs at both room temperature and 400 °C, we analyze their structural changes, chemical compositions, and phase transformations. To extract meaningful ins

Wiometrics : Comparative Performance of Artificial Neural Networks for Wireless Navigation

Radio signals are used broadly as navigation aids, and current and future terrestrial wireless communication systems have properties that make their dual-use for this purpose attractive. Sub-6 GHz carrier frequencies enable widespread coverage for data communication and navigation, but typically offer smaller bandwidths and limited resolution for precise estimation of geometries, particularly in e

Association of pre-pandemic respiratory system diseases with long COVID : a population-based case-control study

ObjectivesLong COVID, defined as diverse symptoms persisting > 3 months post-infection, remains a major post-pandemic healthcare burden. Here we investigate risk factor posed by pre-existing respiratory symptoms and illnesses for development of long COVID, with focus on individuals with mild-to-moderate COVID-19 at the primary infection, that did not require hospitalization during the primary SARS

Determinants of Long-term Surgical Outcomes in Sweden. Searching for Modifiable Factors

As populations age and multimorbidity becomes increasingly prevalent, the demand for high risk surgical procedures continues to rise. Although short term surgical outcomes in Sweden are generally favourable, evidence regarding long term morbidity and mortality following non cardiac surgery remains limited. This thesis investigates perioperative determinants of long term outcomes, with the aim of i

Flexible and rapid validation of structural variation using adaptive sampling

Identification of genomic rearrangements by microarrays or short-read sequencing frequently lacks information about the exact architecture and breakpoints of variants due to technical limitations. Independent verification of complex structural variants (SVs) is often performed using custom targeted assays, making confirmation of clinically relevant findings time consuming and laborious. In this st

Uncertainty estimation for adaptable and reliable robotic vision

Throughout the past decade, neural network-based vision has been increasingly integrated into robots. It is well-known, however, that neural networks can be unreliable, especially when faced with inputs that differ from their training data. With the goal of making neural network-based vision more reliable for robotic applications, this thesis explores uncertainty estimation, and adaptability.Adapt

4D Sports Scene Reconstruction: From Motion Capture System to Free-Viewpoint Video using Gaussian Splatting

Key actions, tactical cooperation, and spatial relationships in sports activities are usually recorded through 2D videos, which limits users’ ability to understand the game in three-dimensional space. Although professional sports events can provide Free-Viewpoint Video using large-scale camera arrays, such systems are difficult to deploy in low-cost scenarios such as community games and personal t

Galactic Disc Dynamics and Structure : Analysis of the Phase Spiral and Vertical Scale-heights

The Milky Way provides the most detailed laboratory we have access to for studying the processes of galaxy formation and evolution. Modern large-scale surveys, most notably the Gaia mission, have revolutionised this field by revealing the extent to which the Galaxy is not a steady system, but dynamically active and rich in non-equilibrium features that preserve traces of past interactions. Underst

Flame structure study of premixed NH3/O2/Ar flames using Raman spectroscopy

While NH3 has gained a lot of interest as a potential carbon-free fuel, at present, there are notable disagreements when it comes to predictions of some of its combustion characteristics, such as burning velocity or species mole fractions, in particular of NOx, which have the potential to cause significant harm to both human health and the environment. Nevertheless, because the NH3 flame presents

Large Eddy Simulations of Rotating Detonations in Non-Premixed H2-Air Annular Combustor

High fidelity Large Eddy Simulations (LES) are performed on a non-premixed hydrogen-air annular rotating detonation combustor. The simulations utilize a 22-step hydrogen-air reaction mechanism and an existing flow solver that is optimized for high-speed reacting flows. The selected combustor, designed by the US Air Force Research Laboratory (AFRL), has been extensively studied experimentally acros

Narrativ identitet: En studie kring studenters narrativa identitet i relation till studentengagemang

Denna uppsats syftade till att undersöka sambandet mellan narrativ identitet och studentengagemang, samt relationen till extraversion, öppenhet, autobiografiskt minne och social tillhörighet. Studien utgick teoretiskt ifrån femfaktormodellen, specifikt extraversion och öppenhet, samt social tillhörighet, narrativ identitet och autobiografisk tänkande. Tidigare forskning bidrog med visst underlag fThis essay examined the relationship between narrative identity and student engagement, in addition to the associations with extraversion, openness, autobiographical recollection, and sense of belonging. The theoretical framework was based on the Five-Factor model, specifically extraversion and openness, alongside sense of belonging, narrative identity, and autobiographical-recollection. Previous

Opinion on solar radiation modification – Ethical perspectives

In the context of the European Commission’s work to further the EuropeanGreen Deal, Executive Vice-President Maroš Šefčovič requested theEuropean Group on Ethics in Science and New Technologies (EGE) to issuea series of three Opinions providing ethical perspectives on different aspectsof the green transition.The Scoping Considerations provided by the Vice-President note that thequestions raised by

Energetic stress, immunosuppression and the costs of an antibody response

1. Recently, there has been much interest in physiological trade-offs between parasite resistance and fitness-related traits such as secondary sexual characters or reproductive effort. More specifically it has been suggested that (i) energetically costly activities may suppress the immune system and (ii) that this immunosuppression is caused by costly immune defences competing with other bodily de

Trends in smoking behaviour between 1985 and 2000 in nine European countries by education

Objective: To examine whether trends in smoking behaviour in Western Europe between 1985 and 2000 differed by education group. Design: Data of smoking behaviour and education level were obtained from national cross sectional surveys conducted between 1985 and 2000 (a period characterised by intense tobacco control policies) and analysed for countries combined and each country separately. Annual tr

Thromboembolic and bleeding risk in obese patients with atrial fibrillation according to different anticoagulation strategies

Background: Data on the relationship between body mass index (BMI), thromboembolic events (TEE) and bleeding in patients with atrial fibrillation (AF) are controversial, and further evidence on the risk of such events in obese patients with AF receiving different anticoagulant therapies (OAC) is needed. Methods and results: We divided a total of 9330 participants from the prospective PREFER in AF

Reversal Treatment in Oral Anticoagulant-Related Intracerebral Hemorrhage—An Observational Study Based on the Swedish Stroke Register

Introduction: Intracerebral hemorrhage (ICH) is the most serious adverse effect of oral anticoagulant (OAC) treatment. The effect of OAC reversal therapy on outcome is uncertain. We compared 90-day survival and functional outcome in patients with OAC-ICH who received OAC reversal therapy with those who did not. Methods: Data from The Swedish Stroke Register (Riksstroke) for all registered cases of

Evaluation of NTRK immunohistochemistry as a screening method for NTRK gene fusion detection in non-small cell lung cancer

Purpose: The small molecule inhibitors larotrectinib and entrectinib have recently been approved as cancer agnostic drugs in patients with tumours harbouring a rearrangement of the neurotrophic tropomyosin receptor kinase (NTRK). These oncogenic fusions are estimated to occur in 0.1–3 % of non-small cell lung cancers (NSCLC). Although molecular techniques are most reliable for fusion detection, im

Unequal lands: Soil type, nutrition and child mortality in southern Sweden, 1850-1914

BackgroundChild mortality differed greatly within rural regions in Europe before and during the mortality decline. Not much is known about the role of nutrition in such geographic differences, and about the factors affecting the nutritional level and hence the resistance to diseases.ObjectiveFocusing on nutrition, we analyse the effects of soil type, used as an indicator of the farm-level agricult

A novel food-based foam as oral contrast agent with negative Hounsfield units for demarcation of small bowel loops on abdominal CT : tolerability and bowel distension in 25 volunteers

Background: Diseases of the bowel are not always displayed on conventional abdominal computed tomography (CT). The studied oral contrast agent aims to improve this. Purpose: To investigate whether the use of a novel oral contrast for abdominal CT enables the same diagnostic advantages as seen in magnetic resonance imaging (MRI). Material and Methods: Twenty-five consented volunteers drank up to 14