X-ray fluorescence (XRF) detection of heavy metals is a cost- and time-effective method for investigation of polluted areas. Compared to laboratory analysis, XRF analysis is limited by high detection limits and uncertainties in some situations. Preparation of samples is known to affect the results of measurements.The purpose of this thesis is to bring a deeper understanding of how different factors affect the results of XRF-analysis. A large number of measurements have been made with the instruments Niton XLt 700 and Niton Xli 700. Results from measurements of lead, zinc and copper have been analysed.This study has shown that a greater moisture content will give a lower measured concentration for the same sample.

During my practical training period I observed that many of the students have a negative attitude against mathematics. I also observed that these students have a difficulty reaching the goals in the subject. In my opinion there are different factors that can be the reason to why these students experiences mathematics as a difficult subject in school. This is the reason why I wanted to find out which factors that lies behind the difficulties and how the pedagogues work to support these students. It is also significant that every single student get their rights to develop a positive attitude against mathematics and that the pedagogue supports the students in their development.The point with this degree project is to find out, with the help of three pedagogues, which factors that could lead to difficulties in mathematics with students.

Denna rapport är resultatet av ett 10 veckor långt examensarbete om logistik i byggbranschen. Rapporten ska redovisa för- och nackdelar med Just In Time-logistik jämfört med lagerföring av material på byggarbetsplatsen. I arbetet ingår även att redovisa vissa extra kostnader som tillkommer i samband med respektive alternativ. Rapporten jämför de olika logistikmetoderna och utgår ifrån tre olika byggprojekt i stockholmsregionen som har helt olika förutsättningar. Målet med rapporten är att ta reda på om byggbranschen kan effektiviseras med Just In Time-logistik. Som hjälp för att nå målet har bland annat intervjuer gjorts och en enkät delats ut till de berörda på varje projekt.  Vad som kostar mest är inte helt enkelt att bestämma då vissa osäkra parametrar ingår i resultatet.

The purpose of this thesis is to evaluate three search engines with regard to retrieval effectiveness of information specific to Swedish users. Coverage and the precision in result descriptions are also examined. The three selected search engines are Google, MSN Search and Svesök. 30 queries were tested against the search engines and the first 20 result descriptions and results were judged for relevancy. Relevancy was judged by a binary scale.

The main project Dry preservation of food waste from households includes a new technique concerning drying and storage of dried biowaste as well as a study of the sorting of household waste and further usage of the dried biowaste. A question asked in the project is, can the dried biowaste be used as a soil amendment? If organic waste is used as a soil amendment, precaution concerning hygienic safety risks has to be accounted for. The objective of this M. Sc.

The local politicians in Sweden are responsible for a great deal of the welfare system why one would assume that there are a lot of demands put on them - demands for certain skills or a certain level of competence. I have in this study tried to find out how the demands on the local representatives concerning the demands for competence and the actual level of competence among the politicians are affecting the local politics. This was done through investigating how the local politicians are perceiving their level of competence and the demands put on them, but also how the employees are perceiving the demands and the level of competence put on the politicians. The study was made in the municipality of Gislaved in Southern Sweden. I was using both quantitative method (an opinion poll among the politicians and employees in the municipality) and qualitative method (interviews with three politicians and three employees and literature studies).In order to investigate the demands for competence I split the concept into ?soft? competence (socially and emotionally based skills), and ?hard? competence (skills based on knowledge, education and experience).

The aim of this study was to reach a deeper understanding of the process that occurs within the social services after receiving a notification according to Chapter 14, section 1, The Social Services Act. More specifically the focus of this study was to illustrate how social secretaries reason about children?s participation in the process, as well as to examine whether the legislative change, Chapter 11, section 1 a, The Social Services Act, has affected the process in any way. The study?s results reflect interviews with five social secretaries who are active in four different municipalities in southern Sweden.

The media landscape has exploded during the last decade, which has lead to a massive advertising clutter. Consumers defend themselves against this intrusive marketing by creating an advertising filter that sorts and blocks. These changing conditions have lead to new and tougher demands on creators and advertisers to create more efficient marketing communication that stands out in the clutter and penetrates the consumers? advertising filter. Many creators and researchers claim that creativity is the most efficient method to stand out in the clutter and generate sought communication effects.

ABSTRACTJuvenile is a phenomena that more or less always has been around in our societies. From a society perspective, a crime is committed if actions that the legislative power of state consider as unacceptable or actions that are punishable. There is no particular explanation to why certain people become criminal; crime can be caused by many different factors at the same time. There are several types of justice. In this essay, it is reparative justice for shoplifting in force, that will be illustrated.The purpose of this essay is to investigate how the shopkeepers experience incidents such as shoplifting or theft in their stores, and how they will react and act if they will be exposed by circumstances like that.

Nimo Verken AB is the leading producer in the Scandinavia of drying cabinets. The construction has, with small changes, been the same since the 70s with a thermostat and a timer as controlling system. There was a wish to develop a modern cabinet which showed remaining time on a display and with energy saving functions.In this report we go through how it is possible to implement a digital controlling system, where remaining time is shown on a display and where it is possible to choose a preset ?program?.The report first presents the fundamental theory for a PIC, where we describe the different registers, how interrupts are handled, the internal clock function and how data is sent to control the different parts of the construction.Next the report presents and describes the new hardware that is needed, such as the encoder, the temperature sensor and the display.After the theory we describe how the program in the PIC may be drafted. Last in the report we have the result of the tests of the temperature variations and the accuracy of the time..

The first regulation concerning the protection of shores was introduced in 1950. The purpose of that regulation was to "secure the general publics condition of an outdoor life". The protection has been sharpened over the years and in 1975 a general protection of the shores was introduced, which meant that all land was protected within 100 meters from the shoreline. In 1994 a supplement was made with the purpose to "preserve good conditions for animal and plants on land and in water". The Swedish Environmental Protection Agency (EPA) did an inquiry of the shore protection regulations commissioned by the Government in 2001. The inquiry pointed out that there were big lacks in the exemption decisions.

Questions about discipline have always been current within the Swedish school system, from the sixteenth century until today. The purpose of this study is to compare the discipline in two old-time elementary schools, located on Gotland, with each other.This study will compare an old-time elementary school from the countryside with an old-time elementary school from a town to show the differences in discipline between the coun-tryside and a town. This study will also focus on how questions about discipline changes from 1847 to 1937/1941. In order to do so I have studied the regulations from the two schools and compared them with each other. When I discuss discipline I will use Michel Foucault?s theory concerning the development of power and discipline in modern society.My study shows that it did not differ much in questions of discipline between the two ex-amined old-time elementary schools.

Efficient numerical methods for option pricing is an active field of research. This project has the goal to examine possible ways to improve an established method of numerical pricing. The method is based on an adaptive finite difference method in price and uses the backwards differentiation formula of order 2, BDF2, in time. The project will focus on improvements to the time integration through implementation of discontinuous Galerkin methods, dG. Empirical convergence and accuracy results are obtained for equidistant dG-methods up to order 3 and performance is compared to BDF2.

   To work and live in the same place where ones employer also is the landlord, can create a situation with many special requirements for the individual. Constrains regarding time, space and impact on social life is likely to appear. Based on theory and empirical research about the Boundaryless work and the Psychological contract the purpose of this report is to examine employees who live and work at the same place. This is done by studying the regulation regarding time and space factors and the psychological contracts in expectations and in violation of the psychological contract and the risks associated with this like Locked-in factors. The study includes interviews with managers and employees (n=9).

The horse's motivations to forage and eat are behaviors that horse owners should take into consideration when designing the horse's living environment. In today?s housing of horses, horses are often kept alone in boxes and paddocks and are fed with small amounts of energy-rich roughage. Problems that can arise with a shortened feeding-time and long periods of fasting are behavioral changes like stereotypic behaviors and an increased risk for ulcers. A solution to the short feeding-time is that you are feeding roughage in a small mesh hay net, or a so-called Slow-feed net.