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Monte Carlo-simuleringar har fått en ökad betydelse som forskningsverktyg inom nuklearmedicinsk bildgivning eftersom man på ett mycket kontrollerat sätt kan studera nästan vad man vill. I denna studie har datorsimuleringar av ett PET-system gjorts med ett program som heter GATE. PET (Positron Emission Tomography) är en nuklearmedicinsk bildgivningsteknik som används mer och mer inom sjukvården sIntroduction: Monte Carlo simulation is a powerful tool in research in the field of nuclear medicine imaging and there is a wide area of applications. The purpose of this work was (1) to understand the basics of the Monte Carlo simulation software Geant4 Application for Tomographic Emission (GATE); (2) to create a model of Philips Gemini TF PET/CT system; (3) to run a number of simulations to comp

The effect of temperature on the adiabatic burning velocities of diluted hydrogen flames has been analyzed using an updated version of the Konnov detailed reaction mechanism for hydrogen. The contemporary choice of the reaction rate constants is provided with the emphasis on their uncertainties, and the analysis of the performance of the updated mechanism is presented and compared to the previous

Inorganic nutrient availability and temperature are recognized as major regulators of organic carbon processing by aquatic bacteria, but little is known about how these two factors interact to control bacterial metabolic processes. We manipulated the temperature of boreal humic stream water samples within 0-25 degrees C and measured bacterial production (BP) and respiration (BR) with and without i

Three-dimensional direct numerical simulation with detailed chemical kinetics of lean premixed CH4/air and H-2/air flames at high Karlovitz numbers (Ka similar to 1800) is carried out. It is found that the high intensity turbulence along with differential diffusion result in a much more rapid transport of H radicals from the reaction zone to the low temperature unburned mixtures (similar to 500 K)

My intention was to explore the childhood of children and adolescents within the religious organization of Jehovah´s Witnesses, in Sweden. I used a technique where I interviewed three active witnesses and four former members. The former members either had left the religion freely or had been excluded by the movement. I wanted to know more from those two different perspectives, because they often s

The story of Jonathan and David is a part of the deuteronomical view of Israels history from the occupation of the holy land all the way to the exile in Babylon. I am aware of that this is not true history, but it is nevertheless interesting to ask oneself: Why are those people a part of the deuteronomical history? What was the meaning in telling the story in this way? Exegetes and researchers ar

North Korea is considered to be the most autocratic dictatorship in the world today. Its citizens are denied their most basic human rights and North Koreas ambition to pursue nuclear weapons is looked upon with great fear from the international community and the US in particular. Some experts say that the threat from North Korea is far greater than the one possessed by Saddam Hussein. Although Nor

This is a brief inquiry into the stories of young Westerners who have chosen to travel to Dharamsala India and participate in activities related to self-inquiry and spirituality, as presented through a Buddhist context. The main question to be researched in this thesis is WHY would a diverse group of international young and middle-aged adults choose to spend time, money and comfort traveling to a

En domstol är skyldig att genom s.k. materiell processledning verka för att ett mål blir tillräckligt utrett. Kravet gäller under hela rättegången och i alla instanser. Mitt syfte med denna uppsats är att fastställa hur långtgående materiell processledning i dispositiva tvistemål bör vara och vilka omständigheter som bör spela in när omfattningen av sådan processledning i enskilda fall bestäms. D

Då smarttelefoner på kort tid har blivit oumbärliga verktyg i många människors vardag har frågor kring hur användare psykiskt påverkas av dem väckts. Studier har funnit samband mellan smarttelefonanvändning och psykisk ohälsa, men i många fall baserat på bristfälliga data. Den här studien syftade att vidare undersöka sambandet mellan smarttelefonanvändning och upplevd psykisk ohälsa samt att underSmartphones have rapidly become indispensable tools in everyday life, leading to questions about their psychological impact on users. Studies have found associations between smartphone use and mental health problems, but in many cases based on insufficient data. This study’s purpose was to further explore the relationship between smartphone use and experienced mental health problems, and to determ

Title: Synergi, a digital reporting tool for working environment. Authors: Sebastian Larsson & Joel Ståhl Supervisor: Radhlinah Aulin, Senior lecturer at the Department of Building and Environmental Technology, Division of Construction Management, Lund University. Examinator: Anne Landin, Professor at the Department of Building and Environmental Technology, Division of Construction Management,

Children’s participation could seem to be an obvious ingredient in social services child protection investigations. Children’s rights to make their voice and opinion heard and to affect the decisions that involve them is stated in law, conventions and other regulations. Despite this, a lot of previous studies show that children’s rights often are forgotten or non-prioritized in social services. Th

In recent decades, digitalisation has been a catalyst for economic growth, along which a vital need emerged for contemporary organisations to rapidly anticipate and react to changes. Organisational change is thus a recognised and widely researched topic within the literature. As we study a software implementation, executed as planned change project, we take on a process perspective on change, part

There is not much that can compete with pre- paring and enjoying a meal, cooked to perfec- tion, in the company of friends. No matter how skilled you are at cooking or baking, it is impossible to achieve the same quality of bread and pizza as in a restaurant since a regular household oven will not genera- te the temperature or taste needed. To solve this I set out to design a way for homeowner

The purpose of this project is to explore craftsman- ship, trying to find out how the use of it can become an integrated part of my design process. The initial part of the project is dedicated to research on the top- ic of what craftsmanship is. The research is conducted through literature review, study visits and market research. The project has an exploratory phase whereby I make experiment

A business becoming more common in todays labour market is the one of consultants. The idea of consultants is that they come into a company as experts in order to solve a problem and when the problem is solved and the contract has expired they move on to another costumer/client. These are usually shorter persiods of time, which means that consultants are constantly looking for new assignments. The

The aim of this study was to derive dietary patterns associated with cardio-metabolic traits and to examine whether these predict prospective changes in these traits and incidence of the metabolic syndrome (iMetS). Subjects from the Malmö Diet and Cancer Study cardiovascular cohort without cardio-metabolic disease and related drug treatments at baseline (n 4071; aged 45-67 years, 40 % men) were in

Aphids cause massive agricultural losses through direct damage or as pathogen vectors. Control often relies on insecticides, which are expensive and not selective. An interesting alternative is to use aphid sex pheromones nepetalactone (NON) and nepetalactol (NOL) to interfere with aphid mating or attract aphid predators. Here, we explore production of these compounds in plants, as their precursor

Objective: Auditory change-detection responses provide information on sound discrimination and memory skills in infants. We examined both the automatic change-detection process and the processing of emotional information content in speech in preterm infants in comparison to full-term infants at term age. Methods: Preterm (n = 21) and full-term infants' (n = 20) event-related potentials (ERP) were