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Water mist systems have seen an increase in use as an alternative clean agent fire suppressant since the late 1980s after the use of Halon gases were discontinued. One of the potential uses of these systems is to provide a protective curtain between a fire and desired target. The following experimental work investigates the radiation attenuation abilities of a single water mist spray. These experi
Utländska studier på militära veteraner visar på att psykiska sjukdomar, såsom Posttraumatiskt stressyndrom (PTSD) till följd av missionen förekommer. Samtidigt som studier på svenska militära utlandsveteraner uppvisat en lägre frekvens av PTSD. Den här studien undersökte kvantitativt hur det psykologiska stödet ser ut och hur det påverkar förekomsten av PTSD hos de svenska militära veteranerna. SInternational studies of military veterans display that psychological illnesses, like Posttraumatic Stress Syndrome (PTSD), exists as a result of the missions. Studies of Swedish military veterans indicates a lower frequency of PTSD, than foreign military veterans. This study used a quantitative method to investigate how the psychological supportive functions by the Swedish armed forces affect the
Face-to-face dialogue can be regarded as a direct and visible way to establish a close connection, between two people facing each other communicate proactively and without barriers. It also plays a key role in the study of verbal and nonverbal communication. A number of studies provide an overview of how gesture rates in face-to-face conditions have registered different rates compared with other s
This master’s thesis investigates the possibility of a new de-air concept for BorgWarners hydraulically actuated torque transfer couplings. De-airing of the hydraulic system is required to minimize the compressibility and ensure low response times. The current de-airing solution works well but limits the usable torque range of the couplings and produces a lot of noise. To meet increasingly demandi
This thesis treats the problem of finding optimal parameters for first-order optimization methods. In part, we use the Performance Estimation Problem (PEP), a framework for convergence analysis of first-order optimization methods. The fundamental idea of the PEP is to formulate the problem of finding the worst-case convergence rate of a first-order optimization algorithm, as an optimization proble
This thesis presents a method, based on feedback linearization, for controlling a general 3-degree-of-freedom simulation model of an aircraft. Only aircraft models that utilize Taylor approximations of the aerodynamic coefficients are considered. The intent is to be able to simulate the same mission with different aircraft models without having to tune the control system specifically for each mode
The recent increase in popularity of the financial instrument Exchange Traded Fund (ETF) and sustainable investments has pushed financial research in the direction of long-term and viable investing. When researching sustainable finance, factors like Environmental, Social, and Governance (ESG) are commonly studied to determine whether an investment is considered “sustainable” or not. This paper int
The Arctic is experiencing a phenomenon called Arctic amplification (AA) which has caused a rapid warming rate two to three times greater than that of the Northern Hemisphere (NH) or global in both observed and modelled data over the past few decades. Previous studies focused mostly on temperature and sea ice albedo feedbacks; however, the impacts of biosphere feedbacks especially from carbon cycl
Den svenska polisen har befogenhet och skyldighet att upprätthålla allmän ordning och säkerhet i Sverige. För att uppnå detta mål har polisen blivit tilldelad olika maktbefogenheter. Det faktum att en myndighet får i uppgift att upprätthålla allmän ordning är dock förknippat med ett antal risker. Befogenheter kan misstolkas och fördomar kan påverka den enskilde polisens handlande. I den här teorThe Swedish police have the authority and the obligation to maintain public order in the Swedish state. To fulfill this objective the Swedish police have been granted different powers and coercive techniques. The fact that a public authority is given this task is however associated with a number of risks. The law can be misinterpreted, and bias can influence the actions of the individual police of
Social workers, like most professionals, are often limited in how they make use of their professional competences by the culture, norms and values that dominate their workplaces. While these groups of working staff have their merits, a strong expectation of conformity might result in errors of judgement among highly skilled members. The purpose of this study has been to contribute to the knowledge
Exchange Traded Funds are known as a relatively recent financial innovation and have been gaining investors' interest in recent years. The performance of ETF in comparison to other benchmarks is still the central concern when investors make an investment decision. This thesis conducts empirical studies in the US market, using the Mean-Variance portfolio optimization, to construct optimal portf
In this thesis we are evaluating Bluetooth Low Energy (BLE) v5.1 in combination with Direction Of Arrival (DOA) algorithms and receiving antenna arrays for indoor positioning systems. The thesis is divided in two parts. The first part is the core of the thesis and is composed by the evaluation of DOA algorithms in a direction finding system. A campaign of measurements is carried out in an active i
Recent focus on the negative effects of climate change has amplified the importance of renewable sources of energy for electricity generation. The contribution of renewables to the energy mix is growing steadily with profound effects on the price of electricity and implications for market participants. In this paper, we employed a similar model to that developed in (Green, 2015) to model the very
Reducing the environmental impact from packaging has become a highlight in both consumers and industrial interest. The paperboard from virgin fibres is commonly used in the folding carton packaging across various type of products, including health care products. It provides the premium perception to the product value yet less circulates the fibre economy. After the paperboard folding carton serves
Introduction: A new method for separation and determination of Glyphosate and Glufosinate alongside their respective major metabolites aminomethylphosphonic acid and 3-(methylphosphinico)propionic acid was found then tested in spiked soil and surface water. Background: Most methods today require derivatization for determination and separation of these compounds. Methods without derivatization rel
In the past years, Sweden had been facing rapid growth of photovoltaic cells and total PV installation capacity increased from 300 kW to 1090 MW (2006-2020). To increase the number of PV users and therefore assist in achieving multiple sustainable goals regarding renewable energy, the installations of such systems were actively supported by the Swedish government. This project is aimed at evaluati
