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Modelling of an industrial control loop for concentration control using Omola, an object-oriented modelling language, is described. The major modelling effort has been made to make a complete nonlinear model of the pneumatic positioner-actuator of the control valve in the loop. A library of several friction models has also been developed. These models have been used to describe friction in the con
Sandvik Coromant is the market leader of producing tools for advanced metal cutting. The tools are produced in cemented carbide, however Sandvik Coromant does not produce tools for machining cemented carbide. The aim of the thesis was to perform cutting tests in cemented carbide with diamond tools to investigate if the binder content affected the machinability of the process. The wear tests were
High-throughput screening is one of the most extensively used methods for the identification of molecules of interest during early stages of drug development projects. It is however subject to many artifacts due to various mechanisms. Aggregation and redox cycling are examples of mechanisms of unspecific inhibition that make a large number of compounds appear as active in several high throughput s
Even though protonemal development of bryophytes has been well studied, it remains unknown whether interspecific competition among mosses species affects their early growth and development. This study evaluated the effects of interspecific competition on in vitro germination and gametophyte development between each pair-wise combination from six common moss species: Atrichum undulatum, Bryum argen
There has been an increasing interest in wastewater treatment in last decades to reduce human footprint. Primarily, anaerobic technology focused on treatment and stabilization of sludge, but now the tendency is to give it a major role in low cost treatment of high/low strength wastewaters, since anaerobic digestion offers energy generation through gas production. Anaerobic membrane bioreactors (A
The six participants, two in Sweden and four in Denmark, interviewed for this thesis are all organizational outsiders: they consult organizations on how to create diverse workplaces. The empirical, qualitative material is analyzed within an interdisciplinary framework consisting of feminist, queer, anti-racist, affect and critical diversity theories. The focus of the thesis concerns resistance fro
Nontypeable Haemophilus influenzae (NTHi) is a human-specific pathogen frequently associated with respiratory tract infections. Recruitment of human plasminogen is one of the multifaceted colonization and invasion strategies employed by NTHi. Plasminogen is a proenzyme abundant in human plasma. Physiological activators convert plasminogen to the proteolytically active broad-spectrum protease plasm
Background There is a widespread consensus that aid alone will not be able to solve the development challenges facing Africa, with Kenya being no exception. The challenges are simply too great. One potential way to facilitate growth while also making it more inclusive is to use impact investing. Impact investing could be defined as investments made with the intention of yielding a financial return
This study examines the problem regarding editorial content in fashion blogs being increasingly sponsored by PR agencies and corporations. The research question will answer how this affects the credibility of fashion bloggers and the blog content. A qualitative approach has been used to measure this phenomenon, with quantitative features. Former blog credibility measurements were gathered to condu
In multi body simulation (MBS) using flexible bodies, damping is an important model input to be able to predict the response of a structure with sufficient precision. The purpose of this thesis has been to estimate the structural damping of an experimental setup and implement the estimated damping into MBS-models of the setup. In this thesis the modal properties in terms of natural frequencies, m
Diamond is a cubic carbon mineral that possess many unique characteristics like extreme hardness and thermal conductivity. There are many types of diamonds like monocrystalline, polycrystalline and coated/ fibrous and in this bachelor thesis the focus was on polycrystalline diamonds; carbonado and diamondites (are divided in three different types of diamonds: eclogitic, perioditic -and websteritic
The overall project objective was to investigate the feasibility of using thermoplastic rubber (TPR) pellet in combination with the fused deposit modeling technique to create 3D objects. The commercially available pseudo-rubber printers available today uses photosensitive binders or laser sintering in the build process. These are however both expensive and exhibits poor mechanical strength and per
Den första delen av arbetet gick ut på att ta fram och utvärdera en behandlingsmetod som kan användas för att på ett kontrollerbart sätt minska den specifika ytan på amorf silika med hög porositet. Den specifika ytan är en viktig egenskap för amorf silika när det kommer till dess applikationer som absorptions- och adsorptionsmaterial. Parametrarna som studerades var pordiameter, partikelstorlek, tA treatment method that can be used to controllably reduce the specific surface of amorphous silica with high porosity has been developed. The specific surface of amorphous silica is important for its adsorption and absorption applications. The parameters that were studied were the pore diameter, the particle size, the time of treatment, the temperature and the silica concentration. The reduction
Abstract: The gender pay-gap is not a new phenomenon in Brazil. Since the increase of female participation on the labor market, the gap has remained a persistent problem that has generated a wide range of studies on the topic. The Human Capital Theory argues that individuals’ education and on-the-job experience are essential determinants on wage estimations. This assessment is not disputed in the
The all-sky survey of Gaia will generate vast amounts of astrometric data, in which there are expected to be thousands of planets found. Finding a system of $n_\textup{p}$ planets requires fitting of a total $5+7n_\textup{p}$ parameters: five astrometric and seven Keplerian parameters for every planet. The problem is thus highly non-linear and computationally prohibitive. After exploiting the line
HVAC systems are widely used to provide a good indoor air quality in buildings. Buildings stand for a substantial part of the total energy consumption in developed countries, and with an increased focus on cost reductions and energy savings, it is necessary to use intelligent and energy-efficient controllers. Accurate models describing the dynamics of the building system is a good basis for intel
Innovation is a key factor for sustainable growth and profitability of companies. As innovative, small, start-ups tend to grow, it is important to understand how the innovation performance can be maintained during the growth. The often relatively unstructured organisations of small companies need to implement structures in order to control the operations as they grow. There are contradictions and
