Arbetets syfte är att undersöka hur högstadieelever för matematiskt resonemang. De frågeställningar som studien inriktas på är vilka lösningsstrategier elever väljer då de resonerar matematiskt såväl som vad  det finns för skillnader och likheter mellan de yngre elevernas lösningar och de äldre elevernas lösningar.Undersökningen genomfördes i två klasser, den ena i årskurs 8 och den andra i årskurs 9, på en grundskola. Eleverna fick lösa uppgifter, vilka uppmanade dem att föra matematiskt resonemang, individuellt. Resultatet av studien visar att majoriteten av undersökta elever har valt att resonera deduktivt. Jämförelsen av elevers lösningar i två årskurser visar att årskurs 9 elevers resonemangsföring präglas av större förtrogenhet med den algebraiska demonstrationen.

Abstract (in English)The task for the diploma work was to develop methods for measuring of moisture content by the Karl Fischer method, in jam, jelly sweets, and fudge.The start premises was a for the company whole new equipment, which should be started up. Then programs should be developed for different kind of samples.In the task it was as well included to develop methods for dissolving the different kind of samples, since the Karl Fischer method demands completely dissolved sample material..

The production of ferrochromium alloys at Vargön Alloys AB contributes to formation of unwanted ferrochromium dust, which contains toxic Cr(VI). The dust is since summer 2005 treated with an iron-sulphate solution to reduce Cr(VI) to the non-toxic Cr(III). A year later the treatment technique was improved and disposal occurs in cells on the landfill. The cells can be up to 300 m3 and the edges can be made out of fro example concrete. Tests are conducted on the treated dust when it is disposed.

The aim of the study was to do an analysis about the conceptions of units and unit con-version. Investigating the students´ attitudes towards their own mathematical ability and the students´ understanding of the conception of units..

The purpose of the present study is to describe adult second language learners? experiences of mathematics learning from a past and contemporary perspective. What experiences in mathematics do they bring? What does it mean to learn Mathematics through their new language?The study is based on life-world narratives from five second language students with another native language than Swedish. Today they all study at a Swedish folk high school, at upper secondary level and they have previously studied at this level in Mathematics. The result shows that the meeting with the Swedish school and folk high school context is confusing.

The goal of this study is to gain knowledge and understanding of how a teacher can apply mathematics with assistance from practical mathematics. Students? point of view on mathematics within practical mathematic lessons will also be examined. Four teachers from preschool to third grade in primary school were interviewed. 30 students from grades one to three were also surveyed. The study shows that teachers see a major benefit when practical mathematics is used in the theoretical teachings of mathematics.

This essay deals with the subject of communication through Facebook. In this survey we studied 100 youths from Karlstad and their communication habits and behavior patterns on Facebook. The social network site Facebook has since its start in 2004 made a mark in modern communication. Today in 2010 the site has more than 500 million users. This paper wants to study what happens to other types of communication.

Sweden is a multicultural country and because of this the Swedish school-system should be adapted so that all pupils can develop their linguistic skills so that they can participate andunderstand the education. By using scientific work from other researchers and my own experiences from a general point of view, I noticed that pupils with foreign origin perform less good in mathematics than pupils with Swedish origin, in the Swedish education system.The purpose of this research is to find out if communication and interplay between the pupils makes it easier for them to understand mathematics and its? concepts. My research involves acertain school class were all pupils have another etnicity then the Swedish one. My aim was to find out if the pupils reached the knowledge-goals for mathematics in the third grade.

Swedish students' knowledge of both mathematics and reading comprehension has deteriorated in recent years. Scientists are discussing whether there is a connection between these areas and that the pupils deteriorating math skills may have something to do with their increasingly lower results in terms of reading comprehension. To investigate this possible connection, I conducted a survey among students in ninth grade and have come to the conclusion that the scientists are right: this connection absolutely exist. Students who received a high score on tasks designed to test students' mathematical problem-solving skills, also received high results on the reading comprehension test. And students who received a poor performance on the problem-solving tasks, were also low performers in the reading comprehension test.

A study has been performed that investigates the variation of iron content in groundwater.The study was initiated by Midvatten AB, which noticed that the iron content in groundwater samples can vary greatly over small distances. The purpose of this study was to geochemically and geohydrologically determine the factors that influence the content of iron and manganese in groundwater from a selection of eskers in Dalarna, and determine how to best sample groundwater with the method used by Midvatten AB. An evaluation was made of how the vertical variation in soil material, water composition, pumping time and pipe material affects the content of iron in groundwater. Piper diagrams were used to study the relationship between the chemical composition of the groundwater and the content of iron and manganese in groundwater samples from the studied areas. The groundwater from the studied areas was then classified in the Piper diagrams, according to the content of the major ions.

I denna studie undersöks vilka uppfattningar SUM-elever, elever med särskilda utbildningsbehov i matematik, har av matematikundervisning när de i klassrummet får specialpedagogiskt stöd i ämnet och hur de känner sig när de följer med specialläraren ut från klassrummet. Det övergripande syftet med studien är att belysa inkludering och exkludering ur ett elevperspektiv. Studien har en kvalitativ ansats och har genomförts i form av semistrukturerade intervjuer med åtta SUM-elever från åk 4 och 5. Till grund för analysen används Asp-Onsjös (2006) tre olika aspekter på inkludering; rumslig, social och didaktisk. Resultatet visar att den inkludering som eleverna anser vara viktigast när de lär sig matematik är den didaktiska inkluderingen, inte den rumsliga eller sociala. Alla elever i studien kände sig socialt inkluderade och vad gäller den rumsliga inkluderingen spelade den inte någon större roll för dessa SUM-elever.

This paper aims to clarify how four customer magazines and digital versions of the magazines are being used by their target group. It focuses on the Ikea customer magazine specifically. After the analysis the conclusion is that out of the four companies customer magazines only one, Ikeas Live magazine, fully re-used the editorial content from the printed magazines on their digital platform. The interviewees were six readers of Ikeas customer magazine Live and two experts from a Stockholm based content firm. After the conducted interviews it became clear that none of the interviewees read the digital version of Ikeas magazine Live.

Swedish students' knowledge of both mathematics and reading comprehension has deteriorated in recent years. Scientists are discussing whether there is a connection between these areas and that the pupils deteriorating math skills may have something to do with their increasingly lower results in terms of reading comprehension. To investigate this possible connection, I conducted a survey among students in ninth grade and have come to the conclusion that the scientists are right: this connection absolutely exist. Students who received a high score on tasks designed to test students' mathematical problem-solving skills, also received high results on the reading comprehension test. And students who received a poor performance on the problem-solving tasks, were also low performers in the reading comprehension test.

Agricultural land could be polluted by radioactive substances after a fallout. We would then need information about the level of contamination to decide whether the crops could be utilized as food under these circumstances. In an experiment carried out during the 1990ies the retention of 134Cs in potato haulm and the transfer to the tubers were studied. The experiment was carried out during three consecutive years. The plants were cultivated in pots under field conditions and the artificial deposition was sprayed directly onto the potato haulm at different times during the growing season.

The moisture content in 10 deliveries of tree parts and 10 deliveries of wood residues were measured with different methods to analyze the quality of procedure used at Dåvamyran today. At the same time a survey was made on the measure procedures used at heating plants in Sweden The majority of the heating plants in Sweden use weight and moisture content as base for payment but at some plants only volume. The moisture content is usually estimated by drying wood chips in an oven but few plants a visual estimation is used. At few plants moisture content is estimated spectroscopicily. The techniques using near infra read light and other electromagnetic are still at a test stage. The methods of measurement used today are quit unreliable for the individual deliveries and there is a risk for systematic mistakes.