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In order to safely design accelerator-based research facilities, such as the European Spallation Source, shielding calculations are carried out using Monte-Carlo particle simulations. However, these calculations gain high uncertainty when large amounts of shielding are needed, due to decreasing particle statistics over distance and mass. To circumvent this issue, variance reduction methods are use
Olagliga transaktioner i form av bland annat penningtvätt, insiderhandel och marknadsmanipulation är stora problem som ofta glöms bort. Bara under 2020 tvättades 1.6 biljoner dollar världen över, motsvarande 2.7\% av världens totala BNP. Insiderhandel och marknadsmanipulation bidrar till misstro för marknaden vilket gör att den till lägre grad kan allokera pengar till företag från investerare då fIllegal transactions in the form of money laundering, insider trading and market manipulation is a major problem that is often forgotten. In the year of 2020, 1.6 trillion dollars were successfully laundered, corresponding to 2.7\% of the world's total GDP. Insider trading and market manipulation contribute to mistrust of the market, resulting in worse capital distribution from investors to co
Orally disintegrating tablets (ODTs) is a popular drug delivery system as they dissolve in the mouth, usually within seconds which enables easy medication for patients with problem swallowing. In this thesis properties of ODTs were compared when produced with direct compression of the excipients or the excipients were pretreated to form granules in a fluid bed granulator prior to tableting. B
Problem Statement: The project started with a request from IKEA to contribute more to the environment. The task for this project, issued by IKEA, was to create a concept for a free-standing indoor storage unit for recyclable waste. The unit should hold at least seven different types of waste: cardboard, plastic, paper, metal, glass, deposit waste and some smaller hazardous waste, such as batteries
The topic of this thesis is estimation of nonlinear dynamical systems, focusing on the use of methods such as particle filtering and smoothing. There are three areas of contributions: software implementation, applications of nonlinear estimation and some theoretical extensions to existing algorithms. The common theme for all the work presented is the pyParticleEst software framework, which has b
We report the growth and characterization of GaSb nanowires grown by MOVPE. The structural properties of the nanowires are investigated by the means of transmission electron microscopy, X-ray diffraction and single nanowire photoluminescence. The measurements confirm a high material quality in the GaSb nanowires. Also, a back-gated nanowire transistor structure is used to extract values for the po
Purpose The master thesis highlights improvements potentials that exist in the Psychiatric ER in Stockholm County and the resource-saving measures that can be realized in the medical logistics through by producing a simulation model of the system. Methodology In order to fulfill the purpose of the master thesis qualitative methods such as interviews has been used successfully. To make the simulati
Många av dagens cancerpatienter får strålbehandling. Den strålning som produceras i en strålbehandlingsapparat är av två olika slag: elektronstrålning och fotonstrålning. Vanligt ljus är också fotonstrålning, men fotonstrålningen som används inom strålbehandling är mycket mer energirik och kallas med ett annat namn för röntgenstrålning. Inför en strålbehandling görs mycket planering utav ett team "This project concerns the precise characterization of one of the VARIAN accelerators used in the radiotherapy clinic at the Finsen Centre at Copenhagen University Hospital, Denmark. Detailed characteristics of the clinical beam incident on the patient are almost impossible to measure. Even though manufacturers provide the necessary information about the specific accelerator, the models are c
We present a Monte Carlo algorithm that detects the presence of a Hamiltonian cycle in an n-vertex undirected bipartite graph of average degree delta >= 3 almost surely and with no false positives, in (2-2^{1-delta})^{n/2}poly(n) time using only polynomial space. With the exception of cubic graphs, this is faster than the best previously known algorithms. Our method is a combination of a variant o
The Swedish parliament has decided that by 2045, Sweden will not be a net emitter of greenhouse gases. There is also a goal to have a fossil fuel free transport sector by 2030. However, the transport sector is still dominated by fossil fuels and many efforts are needed to lower emissions. Sweden has a relatively high share of biofuels, around 20% of the energy use in domestictransportation. Howeve
BackgroundDischarge from a neonatal care unit is often experienced as a vulnerable time for parents. By communicating through digital technology, it may be possible to improve the support for parents and thereby make the transition from hospital to home less stressful.AimTo develop an eHealth device supporting the transition from hospital to home for parents with a preterm‐born child in Sweden usi
When relativistic electrons are used to irradiate tissues, such as during FLASH pre-clinical irradiations, the electron beam energy is one of the critical parameters that determine the dose distribution. Moreover, during such irradiations, linear accelerators (linacs) usually operate with significant beam loading, where a small change in the accelerator output current can lead to beam energy reduc
We critically discuss various experimental methods to determine Curie temperature TC of (Ga,Mn)As thin layers or other conducting magnetic materials by means of electric charge transport measurements. They all base on the influence of sample magnetization on the magnetoresistivity tensor ρ̂ and are an alternative to the method based upon an analysis of the temperature derivative of the sample resi
