Search results

The aim of the thesis work is the further development of practical engine simulation tools based on Stochastic Reactor Models, SRMs. Novel and efficient implementations were made of a variety of SRMs adapted to different engine types. The models in question are the HCCI-SRM, the TwoZone SI-SRM and the DI-SRM. The specific models developed were incorporated into two different interfaces: DARS-ESSA,

Issue management, a central part of software maintenance, requires much effort for complex software systems. The continuous inflow of issue reports makes it hard for developers to stay on top of the situation, and the threatening information overload makes activities such as duplicate management, Issue Assignment (IA), and Change Impact Analysis (CIA) tedious and error-prone. Still, most practitio

We investigate antenna correlation of an M-antenna massive multiple-input multiple-output (MIMO) setup with the purpose of obtaining a low-rank representation of the instantaneous massive MIMO channel. Low-rank representation bases using short-term and long-term antenna correlation statistics are defined, and their performance is evaluated with data sets obtained from channel measurements in both

Gasoline Partially Premixed Combustion (PPC) is a promising alternative combustion concept that can offer both high indicated efficiency and low exhaust emissions in terms of NOx and soot, compared to conventional diesel combustion (CDC). Previous research has shown that PPC can operate with gasoline-like fuels of varying RON numbers. Some of the most promising results come with the use of gasolin

Objective To evaluate the effectiveness of oral glucosamine in subgroups of people with hip or knee osteoarthritis (OA) based on baseline pain severity, body mass index (BMI), sex, structural abnormalities and presence of inflammation using individual patient data. Methods After a systematic search of the literature and clinical trial registries, all randomised controlled trials (RCTs) evaluating

The most complete and realistic physiological data are derived from direct measurements during human experiments; however, they present some limitations such as ethical concerns, time and cost burden. Thermophysiological models are able to predict human thermal response in a wide range of environmental conditions, but their use is limited due to lack of validation. The aim of this work was to vali

Electric and magnetic current densities are an essential part of electromagnetic theory. The goal of the present paper is to define and investigate stored energies that are valid for structures that can support both electric and magnetic current densities. Stored energies normalized with the dissipated power give us the Q factor, or antenna Q, for the structure. Lower bounds of the Q factor provid

The current trend around vehicle automation can be likened to a technological race to achieve the maximum amount of automation possible, aiming for complete ‘Automated Drive’ (AD). The development on the way to a full AD experience includes a range of supporting functions like blind spot warning or collision aid, to advanced driver assistance systems like Adaptive Cruise Control (ACC) and Pilot As

Since its inception, Estonia has been at the forefront of innovation in terms of e-governance and applications of online systems into various aspects of Estonians’ lives. In 2014 Estonia opened up it’s digital borders and launched a digital economic citizenship - e-Residency - available to anyone in the world for using Estonian e-services to register and manage a company online. In May 2018, 5000

Uppsatsen behandlar detaljplaner och vilken roll dessa har vid en kommande bygglovsprövning. Syftet är att utifrån den rättsdogmatiska metoden, utreda om det vid en bygglovsprövning uppkommer några problem med en detaljplan som inte har reglerat byggrätten samt om anpassnings- och omgivningskravet i 2 kap. PBL tillmäts större betydelse när sådana planer ska beaktas. Att en detaljplan inte har regThe thesis examines detailed development plans and what position detailed development plans have in a future examination of building permits. In the light of a legal dogmatic method, the purpose is to examine if any problems arise when a detailed development plan does not contain building regulations. Since detailed development plans are valid until they are changed or repealed, there are many e

Globally, the production and consumption of plastic has increased exponentially. As plastic items are produced using fossil fuels, the plastic industry is intrinsically tied to the petrochemical industry. One unique case of this dilemma lies in the petrochemical industry’s role in plastic production in Taiwan. Despite its reputation for recycling, Taiwan is satiated with ineffective sustainability

Today’s flow of technological improvement, along with increased demand from corporations, is creating workplaces that are becoming more based on digital collaboration technologies. It creates new digital landscapes for corporations and their management. Previous research has shown that users experience frustration when using digital collaboration tools. This study aims to contribute towards facili

This thesis represents results from a numerical study of the ventilation system in the control room in the Swedish submarine A26. This thesis's primary focus is to study and examine the performance and efficiency of the current ventilation system. The ventilation system is very critical and crucial in enclosed environments. Many factors and parameters are affected by the installed system. In c

Vulnerability to climate change and the capacity to adapt to it are the result of intersecting power structures, system dynamics, and social identity markers otherwise known as intersectionality; and thus, differ greatly between contexts. However, despite the stark contextual differences between small and metropolitan cities, and lower and higher income countries, the policy and study of climate c

Restrictions in the distribution of interventions by the public elderly care have resulted in an increase in care for relatives. Those who have increased their relative care are primarily women, especially women from the working class and women who provide care to a relative who was born outside the Nordic countries. The purpose of this study was to investigate young female second-generation Swede

Det är viktigt för försäkringsbolag att kunna förutspå framtida stora utbetalningar och även den totala utbetalningen per år för en specifik försäkring. Detta underlag kan försäkringsbolaget sedan ta hjälp av vid premiesättning och vid köp av återförsäkring. I denna uppsats används extremvärdesteori, en gren inom matematisk statistik där extrema händelser studeras, för att uppskatta storleken av fPredicting future large claims, as well as the total cost, of a specific insurance is essential for insurance companies, for example when setting premium levels or purchasing reinsurance coverage. The purpose of this thesis is to investigate if extreme value theory can be applied to construction defect insurance claims. Data is provided by an insurance company offering construction insurance and

Autonomous robots must operate reliably and safely under uncertain, dynamic conditions over extended periods. To ensure such operational robustness, it is vital that both developers and operators can clearly and verifiably specify functional requirements and safety constraints throughout the robot software lifecycle. My research targets different layers of robot operational safety: early error det

Since the markets of multipacks are growing we have examined the multipacks out of the perspective of opinions, handling / distribution times and costs, and cost of producing multipack both in Sweden and the UK. Our aim has been to develop a research model that can be used for future studies of other multitask markets. The research started with a thorough field study of the Swedish and UK markets