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In this report, the dynamics of an aertor of an activated sludge process is studied. Two control strategies for the dissolved oxygen concentration are tested. One contains either a PI-controller or an on-off controller, the other a self-tuning controller.
There are two key-parameters in the system, KLa, the total oxygen transfer rate, and OUR, the oxygen uptake rate of the microorganisms
The view of FDI and its impacts has shifted throughout history. In conjunction with globalization and liberalization, new opportunities have emerged which have allowed FDI, in its current state to flourish across the globe. South-South FDI has emerged as a cross-border investment of developing and transitional economies to create lasting links with economies of similar structures. The purpose of t
Through different events and developments in the recent 30 years, the generally comprehensive understanding of welfare within the European Union has shifted and one of the aims of this thesis is to investigate if EU welfare states have converged or diverged regarding the provision of welfare. The theory on which the research was based is a typology of welfare states from 1990 by the Danish sociolo
Teknisk utveckling och större tillgång till geografiska data i 3D har lett till ökad tillämpning av 3D-modeller av städer för analys och visualisering. Stadsmodeller används bland annat av kommuner för att visualisera framtida projekt i staden. Genom att studera staden i en virtuell miljö kan man få bättre uppfattning om hur planerade byggnader passar in i den befintliga stadsbilden. Det kan även As the technological developments and the access to 3D geographical data is increasing the usage of city models in planning is becoming more important. City models have traditionally mainly been used for visualization but are now an important tool for analysis. The increased application of city models set higher requirements on standardized formats to effectively exchange data. City models are co
A Switched Reluctance Machine (SRM) is evaluated in terms of torque quality and speed ripple for a particular pump application. The aim is to give BorgWarner insight into the control methodology and possible applications for a Switched Reluctance Machine. The SRM is also compared to their current BLDC machine, used as an oil pump in their torque transfer applications. The evaluation and implementa
Partikelfysikens standardmodell är en av de mest exakta modellerna inom fysiken. Den beskriver interaktionerna mellan fundamentala partiklar som kvarkar och leptoner, hur Higgspartikeln ger massa till andra partiklar och tre av universums fyra fundamentala krafter: elektromagnetism, svag växelverkan och stark kärnkraft. Tyvärr finns det frågor som inte ens standardmodellen kan svara på. "VarfProbing the physical regions in large parameter spaces of typical Standard Model (SM) extensions can be a very difficult computational task. In this thesis project, a new framework has been developed that utilises well-known Machine Learning (ML) techniques in the form of neural networks trained by a genetic algorithm. This framework is rather generic and designed to explore new physics model para
Purpose: Investigate the relation between block ownership and stock liquidity. Methodology: The empirical methods used in this project are of quantitative nature. We use a set of dependent variables representing liquidity measures in order to test how our main explanatory variable, sum of block holdings, affect this. Furthermore, control variables such as market capitalization, share price and vo
The effects of a driver assistance system for keeping safe speed and safe distance (referred to as SASPENCE) on driver behaviour, reactions and acceptance were evaluated in a test carried out in 2006. Twenty test drivers, recruited by ads, drove two times (once with the system off and once with the system on) in real traffic conditions along a 50 km long test route containing urban and rural roads
Abstract in Undetermined Background: The performance of glaucoma diagnostic systems could be conceivably improved by the integration of functional and structural test measurements that provide relevant and complementary information for reaching a diagnosis. The purpose of this study was to investigate the performance of data fusion methods and techniques for simple combination of Standard Automate
Attosecond pulses allow the study of electrons on their natural timescale. They are created from the interaction of atoms with ultrashort, intense laser pulses whose electric field approaches the strength of inner-atomic electric fields. This thesis presents experiments around the generation, characterization and application of attosecond pulses. First, we study the influence of the atomic genera
As novel, anti-amyloid therapies have become more widely available, access to timely and accurate diagnosis has become integral to ensuring optimal treatment of patients with early-stage Alzheimer's disease (AD). Plasma biomarkers are a promising tool for identifying AD pathology; however, several technical and clinical factors need to be considered prior to their implementation in routine clinica
The rise in prevalence and severity of obesity and related diseases imposes increasing costs on society. The objective of this thesis is to discuss and estimate the possible effects of a so-called fat tax as a tool for minimizing these costs. Two alternatives for differentiation of the value-added tax (VAT) on food are compared. The first alternative is an increase of the VAT levied on food contai
Background: When firms grow through acquisitions it is commonly debated whether the two entities ought to be better off as standalone companies rather than as a merged company. This thesis aims at discussing this issue of M&As advantages and disadvantages in terms of source of synergies from the perspective of resource allocation. Purpose: The purpose of this thesis is to describe and analyze
Not many people know that there exists a custody center for illegal immigrants in Sweden. Here immigrants live unwillingly until they get sent home to their country. They get put in custody because they haven’t got the right to stay in the country and the state is afraid they will go “under ground”. The staff consists of different types of people working every day with these immigrants. There work
Abstract Migration is a widespread phenomenon in nature, observed in many different taxa. Migration is often caused by changes in food availability, physical conditions and predation risks. Moving is energetically costly, and hence migration is likely to be a trade-off between increased survival and an energetic cost for migrating, the cost could take shape in decreased fecundity and lower body c
This thesis has been carried out to investigate a few areas concerning electric and hybrid electric powered land vehicles. The main objective has been to analyze the efficiency of such power trains to compare them with canonical combustion engines, both in a tank-to-wheels basis and a well-to-wheels basis. One of the question formulations is if an electric or plug-in hybrid electric vehicle charge
Purpose of the master thesis is to develop an algorithmic trading model for a single asset, which is well functioning on the Scandinavian market. Deliverables: The main focus has been towards creating an indicating model to quantify market impact, cost of trading and model an efficient trading frontier. Methodology: Initially we focused on research papers and literature within our specific field t
The rise of self-supervised learning has granted a deeper level of generalized machine learning capable of learning semantic representations without any use of labelling. With 700 satellites orbiting Earth and generating terabytes of unlabelled data daily, satellite imagery serves as a particularly enticing data set for self-supervised learning, containing rich information with many applicable dom
Liquid hydrogen is an attractive alternative to fossil fuels in the aviation industry, but storing it both before and during flights introduces many challenges pertaining to the cryogenic liquid conditions required. Having reliable models to predict the dynamical behavior inside the storage tank is therefore of great interest. This thesis covers the development of a low-dimensional model for a l
Quantum computing is a potentially disruptive field, and a significant amount of resources are invested in technology advancements. The business-related research, however, is a relatively unexplored area. This master’s thesis explores the key factors that buyers consider when purchasing quantum computing hardware, the perception towards start-ups versus established quantum computing companies, and
