This exam report has been developed in association with Strangbetong AB, Sweden.The natural gravel that is being used as fine aggregate for concrete production today is an ending natural recourse and the Swedish government has decided to strongly reduce the extraction from the year of 2020. The only reasonable replacement is aggregates from crushed rocks but this material has other properties than natural aggregates. The concrete manufacturers now have to learn how to use these new fine aggregates in a cost effective way in order to ensure the quality of their concrete production.In this project, crushed aggregates and combination of crushed and natural aggregates have been tested with existing formulas for fresh concrete. The two parameters yield stress and plastic viscosity have been measured which gives a good description of the workability of the fresh concrete. Different methods to make measurements on the dry fine aggregates, has also been tested, to find out if there is any correlations between these parameters and the parameters from the measurement on the fresh concrete..

Uppsatsen syftar till att underso?ka om redovisningsstandarden IAS 36 efterfo?ljs i Sverige samt om det finns indikationer pa? att resultatmanipulering fo?rekommer inom standarden. IAS 36 behandlar redovisningen av goodwill. Tidigare forskning menar att fo?retag utnyttjar den subjektiva bedo?mningen av goodwill som standarden ger utrymme fo?r, genom att antingen skriva ned fo?r mycket eller avsiktlig fo?rdro?ja och skriva ned fo?r lite.

Uppsatsen syftar till att underso?ka om redovisningsstandarden IAS 36 efterfo?ljs i Sverige samt om det finns indikationer pa? att resultatmanipulering fo?rekommer inom standarden. IAS 36 behandlar redovisningen av goodwill. Tidigare forskning menar att fo?retag utnyttjar den subjektiva bedo?mningen av goodwill som standarden ger utrymme fo?r, genom att antingen skriva ned fo?r mycket eller avsiktlig fo?rdro?ja och skriva ned fo?r lite.

Denna studie underso?ker, via ett experiment, om musik sto?djer inla?rning av Teck- en som Alternativ och/eller Kompletterande Kommunikation. Ma?nniskor kom- municerar pa? olika sa?tt och musik kan vara motivation fo?r la?rande. I Fo?renta Nat- ionernas Konvention om ra?ttigheter fo?r ma?nniskor med funktionsnedsa?ttning sta?r det om ra?tten till kommunikation.

In modern industrial robots the components in the transmission contain nonlinearities. These nonlinearities need to be to estimated either for better control or to use the parameters for diagnosis of the system. There is a lot of work done within system identification and mainly within the field of iterative parameter estimation.This thesis considers recursive grey-box identification for a nonlinear model of the transmission in an industrial robot. The nonlinearities that are identified are friction, spring stiffnes, hysteresis and backlash. These nonlinearities are a part of the models that are presented in this thesis.

FlexRay is a new communication protocol which is fast, reliable and flexible and therefore can meet the increasing demands on data communication in the vehicle industry. The protocol is developed by an industrial consortium containing among  others BMW, Daimler Chrysler, Motorola and Phillips. Today (May 2009) Hägglunds is using CAN for data transmission in their systems. CAN is getting obsolete and has difficulties in coping with the increasing flow of communication. In this report FlexRay and its communication capacity is studied.

Helsingborg has the intention to build a train tunnel south of Knutpunkten. This report investigates the hydro geological aspects of the project. Questions at issue that will be answered: 1. Which parameters affect the groundwater level? 2. How will these parameters change within 100 years considering climate changes and what will be the consequences on the groundwater level. According to SMHI climate analysis the climate can change causing increasing precipitation, temperature, and a rising sea level.

The thick-shelled river mussel (Unio crassus) is a red listed species classified as Endangered (EN) and is also considered within the Habitats Directive. The distribution in Sweden is fragmented and it is mostly occurring in the south eastern parts. We investigated the presence of Unio crassus in a section of the stream Storån, Östergötland County, from Falerum to the inflow into Lake Åkervristen. The environmental parameters investigated were water depth, bottom substrate, shading, water velocity and the slope over the water surface. In this thesis I have focused mainly on water depth and shading, comparing sites with and without mussels.

In this master thesis we are trying to investigate whether the heads of the four major Swedish banks are receiving compensation because of their own performance. We have investigated a number of parameters in the reporting and compensation description of Handelsbanken, Nordea, SEB and Swedbank and compared it to macro data.We have used publicly available information from the banks as well as macro data from 1998 to 2009.We have come to the conclusion that the revenue and profits of the banks are heavily influenced by external factors and that there does not appear to be a clear link between a CEOs actions, the reported results for the bank, the shareholder gains and the compensation for the CEO. It appears as if the bonus payments to a CEO may depend more on parameters beyond the CEOs own control than the performance of the CEO..

Leisure boats of today have a lot of electronics that needs battery power to work. In additionto that electric propulsion systems have gotten more popular lately, which further increasesthe demand for high battery capacity. The batteries used are mostly lead-acid batteries and toget the most out of the batteries it is important to treat them right. To optimize the electricsystem it is important to have knowledge of how the batteries and the electric motor are usedand which factors affect e.g. efficiency and recharging.A new electric drive that can replace old diesel engines is being developed and needs testingand evaluation.

In this master thesis a robot arm belonging to an automatic milking machine from DeLaval is investigated. The robot arm is controlled by a pneumatic cylinder and a valve. The goal of the master thesis is to investigate instability problems and to find out if it is possible to solve them by using gain scheduling. Gain scheduling is a type of controller where the parameters of the controller are changed during operation, for example depending on the working point. First a nonlinear mathematical model of the system was made.

Wood pellets are an upgraded product of residuals from several wood processing industries, for example saw mills and pulp industries. The pellets are produced by pressing the milled and dried sawdust to cylindrical units with a higher density than the initial raw material. Pellets have great benefits compared to the raw material: high energy per volume, good transport and storage properties and homogeneity. Several parameters collaborate in the whole process, which makes it complex. Wood is a heterogeneous material, chemically and structurally dependent on wood parts, habitat and storage procedures.

The purpose of this master thesis is to implement and validate a Power System Stabilizer (PSS) to a generator at Trängslet hydropower station in Dalarna, Sweden. Problems with local rotor oscillations can occur at the hydropower station when power is transferred on a new power line (130 kV) from Northern to Southern part of Dalarna. To ensure good operation properties on this power line Fortum Generation AB and Fortum Distribution AB wants to activate a PSS on a generator.There have been investigations in which situations and what equipment that contributes to rotor oscillations. When this is known the PSS is tuned to damp these oscillations by choosing a good set of parameters. The most important parameters for good performance are to choose amount of gain and phase compensation.

Bakgrund Orientering a?r en utha?llighetsidrott da?r tempo och intensitet varierar, beroende pa? terra?ng och lo?parens navigationsfo?rma?ga, och den skiljer sig fra?n vanlig utha?llighetslo?pning genom att den ocksa? innefattar kuperad terra?ng och ett kognitivt inslag. Prestationsfo?rma?gan hos orienterare kan da?rfo?r antas vara mer beroende av kostens sammansa?ttning a?n fo?r vanliga lo?pare. Forskningen om kroppssammansa?ttning, energiutgifter och kostintag hos orienterare a?r idag bristfa?llig.

During the milling of Sandvik Coromant?s world leading Drill with replaceable inserts,the CoroDrill880©, burrs appear around the milled surfaces. The burrs are removedusing different methods, one of which is deburring with special brushing machines thatare integrated into milling cells. The machines of the type Sinjet, use a Siemensguidance system. The deburring results are not satisfying and manual deburring isrequired afterwards.