The aim of my study is to investigate how last year students in upper secondary schoolunderstand certain mathematical concepts, in particular the unit circle and its trigonometry.I have used intentional analysis to interpret student?s actions when they solve certain tasks onthe basis of a cognitive, situated and cultural context.Interviews with four university teachers in mathematics about the unit circle, trigonometry,and mathematical understanding, serve both as background for the study and as basis for adiscussion, where I relate students understanding to what the teachers want new students toknow about these concepts when they begin university studies in mathematics.The students were arranged in three groups with three students in each group. Each group waspresented with two tasks, one in which they were asked to calculate the cosine values for onepointed, one blunt and one straight angle, each located in a separate triangle. They were alsoasked to decide whether the points (0,71; 0,71) and d (1 2 , 3 2 ) are located on the unit circleor not.My conclusion is that students mainly have an operational conception of the unit circle andtrigonometry. The lack of structural conceptions result in difficulties in seeing connectionsbetween the concepts in unfamiliar situations.

The aim of my study is to investigate how last year students in upper secondary schoolunderstand certain mathematical concepts, in particular the unit circle and its trigonometry.I have used intentional analysis to interpret student?s actions when they solve certain tasks onthe basis of a cognitive, situated and cultural context.Interviews with four university teachers in mathematics about the unit circle, trigonometry,and mathematical understanding, serve both as background for the study and as basis for adiscussion, where I relate students understanding to what the teachers want new students toknow about these concepts when they begin university studies in mathematics.The students were arranged in three groups with three students in each group. Each group waspresented with two tasks, one in which they were asked to calculate the cosine values for onepointed, one blunt and one straight angle, each located in a separate triangle. They were alsoasked to decide whether the points (0,71; 0,71) and d (1 2 , 3 2 ) are located on the unit circleor not.My conclusion is that students mainly have an operational conception of the unit circle andtrigonometry. The lack of structural conceptions result in difficulties in seeing connectionsbetween the concepts in unfamiliar situations.

The aim of my study is to investigate how last year students in upper secondary schoolunderstand certain mathematical concepts, in particular the unit circle and its trigonometry.I have used intentional analysis to interpret student?s actions when they solve certain tasks onthe basis of a cognitive, situated and cultural context.Interviews with four university teachers in mathematics about the unit circle, trigonometry,and mathematical understanding, serve both as background for the study and as basis for adiscussion, where I relate students understanding to what the teachers want new students toknow about these concepts when they begin university studies in mathematics.The students were arranged in three groups with three students in each group. Each group waspresented with two tasks, one in which they were asked to calculate the cosine values for onepointed, one blunt and one straight angle, each located in a separate triangle. They were alsoasked to decide whether the points (0,71; 0,71) and d (1 2 , 3 2 ) are located on the unit circleor not.My conclusion is that students mainly have an operational conception of the unit circle andtrigonometry. The lack of structural conceptions result in difficulties in seeing connectionsbetween the concepts in unfamiliar situations.

This essay deals with the ideas of social change in the Iron Gates Gorge site of Lepenski Vir during the Mesolithic. The change from a mainly fish-based subsistence strategy to a strategy that came to rely more on hunting and later domesticated animals could have been the onset of the social change that is noticeable in the material culture from the site. Theessay is divided in two main segments. The first consists of a case-study based on three themes that describes and searches for changes in the subsistence-, settlement- and burialpractises during the Mesolithic and beginning of the Neolithic phases, and the second part analyses the results from the case-study. It is primarily the idea of transformations and reproductions of traditions that will be dealt with in the analysis which is facilitated by a theoretic structure based on and inspired by the works of Emilé Durkheim and Anthony Giddens..

The purpose of this Bachelor?s thesis is twofold. Firstly it aims to make a contribution to the understanding of how five Swedish Diocesan libraries have carried out the digitizing of their rare book and manuscript collections. Problem areas related to this activity are also investigated. Secondly, it aims to examine the relative guidelines and standardization norms, which have been formulated on a national basis.

This paper deals with flat iron fragments from the Viking Age hall situated in Birkas Garrison, Adelsö parish in Uppland. The aim of the study was to identify which objects these flat fragments were originally derived from. The aim was also to discuss the function of these objects and their presence in the hall. This would hopefully increase the knowledge about the hall and the warriors who lived and worked there. In some cases the fragments form and placement in the hall has not provided enough information to classify the object from which they derived.

This thesis describes a method of measuring axial magnetic leakage flux in an operational hydropower generator. Axial magnetic leakage flux is the magnetic flux at the ends of a rotating generator, which goes through the stator parallel to the rotor axis. This flux can cause circulating currents in the stator iron, giving rise to losses, and can in the worst case overheat a generator, causing it to melt down. To measure the axial flux, and how it affects the generator temperature, a measurement system was constructed on behalf of Vattenfall. The system consists of search coil sensors and a signal-processing unit with amplifiers and active filtering.  To confirm the behaviour of the axial leakage flux and the functionality of the measurement system, a test installation was made.

In this paper I have tried to find out the reason the medieval town of Vä was created. I have studied several different areas in witch all, in one way or another, have had an effect on the making of Vä. This areas includes topography, iron production, mill handling, religious effects, royal affliction and also if the name Vä could tell something about Väs history as a religious cult. I have also looked at two other places not far from Vä, the medieval harbour town Åhus and the big village of Fjälkinge. By comparing these three places I tried to find out what Vä had that the other places did not, which made Vä turn in to a town.

One of ABB Power Systems´s business areas is HVDC (High Voltage Direct Current) technology. HVDC is used for transmissions for both short and long distances. One of Power Systems?s products is called HVDC Light. HVDC Light is a relatively new technology for power transmission, but have before only been used for motor drives applications.

This essay consider ritual death during the ironage, and through a presentation of historical and archaeological sources. Considered ritual death I think we should study both historical and archaeological sources, to get a vider view and a new perspective. To make the essay easier to understand I have split up the early and the late Iron Age in the discussion. In order to study the ritual death I have shown archaeological examples like bogsacrifices in the early ironage, and decapitated victims in the Viking society. The victims have been considered as slaves by some archaeologist.

The Christianisation of Sweden is not much about religion. Instead, there is much to be gained by looking at it as a colonial situation with changing social identities and power structures. This is evident by the prevalence of hybridisations in the archaeological material.Some of the material categories that show the clearest example of changes are the burials from the 9th century up until about AD 1200. This is exemplified by two different Iron Age burial sites in Stockholm county, Uppland, Sweden: RAÄ 59, Valsta, in Norrsunda parish and RAÄ 40, Lilla Ullevi, in Bro parish; They both show hybridisation by involving older elements with newer ones during a time period when the church was not quite established in the region yet.The Christianisation of Sweden is a colonial situation, but the research tradition has often also used a colonial lens from the 19th and early 20th century in its approach to the period. This means that the same questions, interpretations and conclusions, often based on written sources, have been continuously reused for a long time, which has had consequences for the archaeology in Sweden..

The main purpose of this study is to view the aims of the local authority of Botkyrka for their prehistoric village, and to compare those with the actual activities in the village.Because of no official formulated aims, the study were laboured through interviews, observations, analysis of evaluations and a parallell literature study.For the visiting pupils today, the village has an introduction, but not a follow-up. Pedagogically the follow-up is the most important part, seeing that it?s there the knowledge is created in relation to the experience.Through experience-pedagogy, based on learning by doing, try to attain an experience intended to generate knowledge. But in this case, the focus lands on doing, and the reflection fails to occur. This is a learning based on the situation, rather than on the reflection, situated learning..

Elephants are hindgut fermenters, which affects their diurnal rhythm. To reach their nutrient demands, elephants must eat almost constantly throughout the light part of the day. Sexual dimorphism may also affect their behavioral patterns. To understand the elephants' normal living habits and foraging behaviour, we conducted a pre-study in the Mara Triangle, the north-western part of the Maasai Mara National Reserve. Each of four to six observers randomly chose a focal animal within the group of elephants by the criteria that they were adults and visible.

The purpose with this essay is to study how children in the fifth grade experience reading in three different reading cultures; library, home and in school. The children?s experiences from reading are compared to expectations from library and school.Data, to this study, is collected through qualitative interviews in two focus groups and analyzed by using an idea analysis. The INSU-model, Information Needs, Seeking and Use, and Aidan Chambers reading circle in combination with a triangle of the three reading cultures are used as a theoretical framework. The analysis shows that children are using reading for different purposes in different reading cultures.

The aim of my study is to investigate how last year students in upper secondary schoolunderstand certain mathematical concepts, in particular the unit circle and its trigonometry.I have used intentional analysis to interpret student?s actions when they solve certain tasks onthe basis of a cognitive, situated and cultural context.Interviews with four university teachers in mathematics about the unit circle, trigonometry,and mathematical understanding, serve both as background for the study and as basis for adiscussion, where I relate students understanding to what the teachers want new students toknow about these concepts when they begin university studies in mathematics.The students were arranged in three groups with three students in each group. Each group waspresented with two tasks, one in which they were asked to calculate the cosine values for onepointed, one blunt and one straight angle, each located in a separate triangle. They were alsoasked to decide whether the points (0,71; 0,71) and d (1 2 , 3 2 ) are located on the unit circleor not.My conclusion is that students mainly have an operational conception of the unit circle andtrigonometry. The lack of structural conceptions result in difficulties in seeing connectionsbetween the concepts in unfamiliar situations.