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Police crash reports are often the main source for official data in many countries. However, police sampling and data are known to be subject to bias, making the countermeasures adopted according to them possibly inefficient. In the case of bicycle crashes, this bias is most acute and it probably varies across countries, with some of them being more prone to reporting accidents to police than othe

Irradiating a flame by microwave radiation is one of several plasma-assisted combustion (PAC) technologies that can be used to modify the combustion chemical kinetics in order to improve flame-stability and to delay lean blow-out. One practical implication is that engines may be able to operate with leaner fuel mixtures and have an improved fuel flexibility capability including biofuels. In additi

Ljus är verkligen fantastiskt. Det kan ge oss känslomässiga upplevelser, som när det faller genom en trädkrona i en skog eller vid en blodröd fullmåne, men det gör det också möjligt för oss att uppfatta och förstå vår omgivning. Majoriteten av den information vi kan tillgodogöra oss om Universum, får vi genom det ljus som atomer och joner i olika kosmiska objekt sänder ut. Varje foton - den minstaMotivated by spectroscopic analysis of astrophysical and laboratory plasma, this thesis concerns the fundamental structure and spectral properties of atoms and their ions. The multiconfiguration Dirac-Hartree-Fock (MCDHF) method is used to predict the emission or absorption of radiation, by atomic systems in general, and of heavy and highly charged ions in particular.The first set of publications,

Background: The success of randomized-controlled stroke trials is dependent on the recruitment and retention of a sufficient number of patients, but fewer than half of all trials meet their target number of patients. Methods: We performed a search and review of the literature, and conducted a survey and workshop among 56 European stroke trialists, to identify barriers, suggest methods to improve r

Shift work has been proposed to promote cognitive disturbances in humans; however, conflicting evidence is also present. By using data from 7143 middle-aged and elderly humans (45-75 years) who participated in the Swedish EpiHealth cohort study, the present analysis sought to investigate whether self-reported shift work history would be associated with performance on the trail making test (TMT). T

Ecosystem responses to changes in species diversity are often studied individually. However, changes in species diversity can simultaneously influence multiple interdependent ecosystem functions. Therefore, an important challenge is to determine when and how changes in species diversity that influence one function will also drive changes in other functions. By providing the underlying structure of

We consider optimal channel shortener design for reduced-state soft-output Viterbi equalizer (RS-SOVE) in singlecarrier (SC) systems. To use RS-SOVE, three receiver filters need to be designed: a prefilter, a target response and a feedback filter. The collection of these three filters are commonly referred to as the “channel shortener”. Conventionally, the channel shortener is designed to transfor

Under changing climate conditions, acceptable functionality of buildings and their adaptation to climate are required. More rain and extreme conditions in future make buildings and the built environment more vulnerable. There are currently several scenarios regarding possible future climatic conditions. Results from the impact analysis of climate change can be significantly affected by the selecte

Nanowires can act as efficient light absorbers where waveguide modes are resonant to specific wavelengths. This resonant wavelength can easily be tuned by the nanowire dimensions, but the absorption of infrared radiation requires diameters of hundreds of nm, which is difficult to achieve using epitaxial growth. Here, we demonstrate that infrared absorption in InAsSb nanowires with the diameters of

This thesis has investigated the potential benefits of using transfer learning when training convolu- tional neural networks for the task of autonomously driving a car. Three transfer learning networks were trained and compared with a conventionally trained convolutional neural network. The first conclusion is that training, as expected, is considerably quicker when using transfer learning. More s

During the past few years the focus on bioprocess monitoring and control has increased. An area still under intensive development is the sampling methods for efficient and rapid analysis during fermentations. In this thesis, an online-sampling and monitoring scheme was developed using the versatile automated continuous flow system (VersAFlo) for recombinant protein production. From the implementat

Om dina ögon vore lika känsliga som astronomers toppmoderna teleskop skulle du kunna se långa band av ljus när du kollar upp mot himlen. Dessa band kallas stjärnströmmar och befinner sig i yttre delen av våran galax, Vintergatan. Strömmarna skapas från en klump av stjärnor, t.ex. en dvärggalax, medan de roterar runt Vintergatan. Det som händer är att stjärnor slits loss från klumpen och dras ut tiThe orbital approximation for stellar streams is the assumption that all stars in a stream can be described as following the same orbit. In this thesis, I evaluate this approximation as a method for constraining the potential of the Milky Way. I wrote a program in MATLAB which integrates the orbits of test particles in a potential model which resembles that of the Milky Way's halo and disc. Th

Integrins are adhesion molecules that control cell to cell interactions and play a fundamental role in adhesion of T cells during an immune response. Protein tyrosine phosphatase nonreceptor type 22 (PTPN22) is an important regulatory factor of the integrin lymphocyte function-associated antigen 1 (LFA1). A single-nucleotide polymorphism in the gene coding for PTPN22 has previously been linked as

In the face of climate change wind energy plays an increasing role in Norway. The construction of new wind farms causes opposition and conflicts with, among others, Sámi reindeer herders who are concerned about losing their pastures. By using Schlosberg’s (2004) environmental justice framework, I explore the justice implications of wind energy with regard to Sámi reindeer husbandry in the case of

Parkinson's disease is one of the most common neurodegenerative diseases, and stem cell therapy can be used to reduce patient's symptoms. In this therapy, dopamine producing neurons are transplanted into the patient's brain, after being derived from pluripotent stem cells (PSCs). To understand current protocols for this process and to find new ones, it is necessary to understand the ge

This Master's thesis has concerned the segmentation and classification of background textures in images. In order to segment the images we have used the SLIC algorithm to create superpixels. These are a sort of over segmentation of the image where pixels close to each other and similar in colour are considered to be the same texture. All superpixels were then classified using a convolutional n

The Chinese stock market has been established for more than 20 years. Although it is not as mature as the highly developed western securities markets, it has a huge influence on the global economy. It is significant to study the risks of the Chinese stock market, especially the risk of stock indexes. Affected by the economic globalization today, more and more financial derivatives and financial i

Despite the millenary practice of urban agriculture (UA) in Sub-Saharan African (SSA) cities, research conducted on the topic is much more recent and still little is known on the impact UA has on the engaged households in terms of food security, nutrition and health. The overall picture that emerges from the literature is one of stark contrasts; some advocate UA as a tool of empowerment, capable t

The purpose of this master thesis is to investigate the difficulties that arise in the construction process by analyzing documentations from real-life construction processes that occurred in four municipally in Skåne. By mapping out all the problems that arise, opportunities for improvement will be obvious and thus efficiency solutions can be proposed. After a conversation with a control inspector

In water resource management, it is of importance to be able to predict how different activities might contaminate aquifers. For this kind of application, numerical modelling of water and solute transport can be a useful tool. The purpose of this study was to investigate if one-dimensional numerical modelling (Hydrus-1D) of water in the unsaturated zone of the subsoil is useful to assess the trans