Sökresultat

This report is the result of a thesis in mechanical engineering focused on product development. The project was performed at MarineDiesel, a company producing diesel engines for marine applications in Ängelholm, Sweden. A need of a sterndrive strong enough for large diesel engines is present on the market. This thesis involves hydraulic systems and mechanical geometry for trimming and steering of

A new type of Remotely Operated Vehicle (ROV) has been designed by Marin Mätteknik (MMT) in cooperation with Reach Subsea and Kystdesign AS; the Surveyor ROV. Although MMT is successfully using the SROV in day-to-day operations, no mathematical model describing the system has previously been derived. In this thesis project, a mathematical model describing the SROV is developed through system ident

This master’s thesis presents the design and construction of a centrifugal electrospinning nano-fiber production unit. The design is realized to as great extent as the limits of the thesis allows. The thesis presents the stages of product design from both Ullrich & Eppinger methodology as well as others, from concept generation to materials selection and finally manufacturing and assembling an

As cameras become cheaper and better, using them as sensors have become increasingly more common. This is especially true in robotics and for autonomous robot navigation. This thesis suggests a method where inputs from a single camera are used for making a robot self driving. The robot is assumed to move along planar surfaces, common in indoor environments. The method is based on matching image f

Nanocellulose is being studied to a great extent around the world as it has great potential and many possible applications, for example, as an additive in greener polymers in a world where the need for replacements for fossil fuel based polymers increase. Different sources of cellulose are being considered for the production of nanocellulose as this can add value to what otherwise often is a by-pr

Stigma of pregnant and mothering adolescents is linked to socially constructed gender roles and sexual identities, ideals of motherhood, and stigma of adolescent sexual activity. As such, it constitutes an adolescent sexual and reproductive health issue. It is a contributing factor to several negative consequences related to adolescent pregnancy, such as advert health outcomes, lower educational a

Förutsägande om klimatförändringar och nederbördsmönster i den närmaste framtiden samt urbanisering leder till högre volymer av avrinning, vilket i sin tur utmanar hållbarheten och funktionaliteten hos stadsdräneringsnät. För att förstå hur dessa förändringar kommer att påverka den befintliga infrastrukturen i stadsområden behövs integrerad programvara för urban vattenmodell för att identifiera efThe predictions on climate change and precipitation patterns in the near future, as well as urbanization, lead to higher volumes of runoff, which in turn challenge the sustainability and functionality of urban drainage pipe networks. In order to understand how these changes will affect the existing infrastructure in urban areas, integrated urban water model software are needed to identify effectiv

We probe the implications of 5 different previously developed models of the evolution of the Milky Way’s radial metallicity gradient for radial migration of stars observed today between 5kpc < R < 12kpc. Our sample contains 7167 giant stars, with metallicities and radial velocities obtained from APOGEE DR14, full 5-parameter kinematic information from Gaia DR2, and ages derived in Martig et al. 20

IPO underpricing is an international phenomenon that has been documented by numerous authors. However, the IPO market keeps evolving. Since the decline in IPO volume following the “dot-com bubble”, there have been periods with high IPO volume, as well as periods with low IPO volume. This paper uses a linear regression model and t-tests to investigate underpricing of European IPOs between 2001 and

The marginal pricing power and individual impact of proxies used in international asset pricing and financial integration studies is not well researched. In this study I look at the most widely used proxies; i.e. World Index Return, change in Eurodollar rate, change in spread between 10-year U.S. T-bond and 3-month U.S. T-bill, and change in spread between Baa and Aaa rated bonds; and ascertain wh

This work constitutes the results from a one year master thesis research project (Sep, 2019 to Aug, 2020). Metal-Organic Frameworks (MOFs) have been used for encapsulation of homogeneous catalysts to generate heterogeneous catalysts. This work describes the incorporation of the non-heme iron complex [(Fe(II)N4Py)]2+ and two molybdenum−sulfur clusters (MOS) into the pores of UiO-type MOFs via absor

The wood pulp industry has been around for a long time, but new higher quality pulp require more advanced solutions to old processes. One of these processes is the peroxide (PO) bleaching process, which is the last of a whole chain of bleaching processes at the Mörrum pulp processing plant. The aim of this thesis was to develop and study a model for the peroxide pulp bleaching process, and thereaf

This thesis was written to answer the questions How much do Swedish students of Japanese know about the phonetic component of kanji? and Does awareness of the phonetic component help students guess the reading of kanji?. The phonetic component of kanji gives you the reading of kanji, and can give you an edge in correctly reading unfamiliar kanji. By doing some background research into the curricul

This Master’s Thesis shows how to model the kinematics and forward dynamics for the parallel kinematic robot from ABB, IRB340 FlexPicker, and how to implement the control using software and hardware from B&R Automation. With conventional methods the forward kinematics, inverse kinematics and the kinematics for the velocities and accelerations of the robot are modelled. The forward dynamics, ca

The coalescence of emulsion droplets during the homogenization process is governed by the emulsifier adsorption rate. This is in turn affected by the size and shape of the adsorbing molecule which can be dependant of the aggregation states. The aim of this thesis was to develop a model system suitable for measuring the efficiency of emulsifier during homogenization and to evaluate the hypothesis t

Securities can be classified in multiple ways. One of the most common ways to classify securities is using Morningstar’s label system. For instance a fund can be Large-Value or Small-Growth. However, these systems have inherit limitations that makes it hard to properly maximize diversification in the selection of a portfolio. In this thesis, we present a method to classify securities that allows f

Personlig integritet är ett begrepp som har fått en allt viktigare innebörd i arbetslivet de senaste åren. Frågan om drogtesters plats i arbetslivet är en av de mest framträdande frågorna, då det av många anses vara en kränkning av den personliga integriteten. Det är därför av stor vikt att bedöma när och för vilka syften ett drogtest kan anses vara befogat. Det uppstår därmed en situation där arb

Abstract Many species have genetic sex determination and sex chromosomes that differ in size between males and females. This heteromorphy in sex chromosomes has evolved due to the suppression of recombination between Y and X (or Z and W in birds) following the accumulation of sex-specific alleles near sex-determining loci. The degree of gene expression imbalance between the sexes and also relati