This thesis has been carried out in autumn 2009 at Uppsala University for Boliden Mineral AB. Physical modelling has been used to model a comminution circuit. The model has then been linked to a PLC.When a concentrator is about to become operational Boliden Mineral AB have been looking for a way to test the PLC. The purpose of this report has therefore been to develop models for the subprocess in a concentrator and link these models to the PLC. The subprocess was a comminution circuit in Aitik36.

To create multifunctional buffer strips along a watercourse in an economically sustainable way requires consideration of many different factors. In this plan we have selected pollutant reduction as the main purpose of the buffer strip. We have also strived to achieve minimal income loss due to reduced production, increased biological diversity, good game preservation that leads to higher income from hunting, aesthetical satisfaction and possibility to profit from available subsidies. This is done mainly to make landowners/farmers more interested in creating buffer strips along water courses. As sand is the dominant type of soil in the area, the water course is less affected by surface runoff compared to if the soil would be clay or some other finer texture. Game preservation and subsidies have therefore been the main factors when establishing the width of the strip, because these require wider buffer strips in some cases.

This study was made on former agricultural areas that had been planted with spruce or pine, in the county of Västerbotten. The goal of the project was to investigate suspected deficiency of boron in these areas. Several objects have been reported for possible deficiency and some of these have the characteristic symptoms of boron-deficiency. The hypotheses are that 1) Boron deficiency is present at several of the investigated objects. 2) Planting of forest on cultivated postglacial sediments leads to a successive podzolisation with a decreasing content of organic matter in the mineral soil, due to decomposition, and a decreasing pH in the soil, even on locations that have been added lime. To be able to confirm or reject the hypotheses a number of tests were performed.

The purpose of this degree project was to build laboratory equipment for a new course in power electronics that starts this autumn 2010 at Uppsala University. The equipment is intended for student labs and it covers the most important areas of the course including rectifying, buck-/boost-converters and PWM-modulation. It is built as one sealed unit where all the electronics are built-in but visible and it has a connection board where students safely can connect the different circuits. The project has advanced from theoretical studies of circuit design, choosing of components and simulations to drawing the printed circuit board (PCB), soldering, case building, final testing and troubleshooting - basically most steps from an early idea to a final product. Measurements on the final product gave about the same results as the earlier simulations of the circuits and the result is overall satisfying..

Title: Facebook girls, a qualitative study of social medias and Facebooks impact on young girlsNumber of pages: 32Author: Mirja LarssonTutor: Amelie HössjerCourse: Media and Communication studies CPeriod: Autumn 2010University: Division of Media and Communication, Department of Information and Media,Uppsala UniversityPurpose/aim: To discover any possible difference between young girls and older girls in their wayof using Facebook.Material/method: Personal interviews, literature, electronic sources, Internet sources.Main results: The younger girls are not as aware as the older girls of their exposure on Facebookand the possible down-sides of their frequent Facebook-usage. Young girls in general use Facebookas a source to form their identity.Keywords: Facebook, identity, young girls, Cooley, Elza Dunkels, Altman and Taylor.

To plan and build a garden in Dubai has other conditions and challenges than what you experience in Sweden. The heat, wind and lack of water makes the need for durable plants, a good design and landscaping important if you want to have the opportunity to use your garden during most of the year. The soil is poor of nutrients, alkaline and sometimes saline, witch makes supplying the soil with organic material and various fertilizers necessary if you want to be able to plant a bigger range of plant material in your garden. Another important part is to provide your garden with a good irrigation system that should be put into the ground before planting so that the plants are given a more even irrigation. It?s relatively green scenery you meet and to me it?s in a way surprising since the country with its climate is rather harsh for the purpose of supporting plant life.

The aim of this study was to document treatments of sick and injured reindeer in Tornedalen and the area around Gällivare. I also wanted to find out the basis for the treatments, how they are considered to work and if they agree with established veterinary science. The occurrence of ?folk remedies? was especially studied. In all, 40 reindeer owners were interviewed.

ABSTRACT Tobacco Rattle Virus (TRV) is a soilborne plant virus. It is an important pathogen in potatoes where it causes spraing disease. This disease can lead to significant economical loss for the farmer, so it is imperative to get the proper diagnose before planting. TRV is spread naturally by free-living nematodes (Trichodorus and Paratrichodorus). Transference of TRV to a plant occurs when the virus-carrying nematodes feed on plant roots. The relationship between virus, nematodes and plants is complicated, and has to these days not been fully characterized. The diagnostic methods available today do not work sufficiently.

This study is done on behalf of Södra skogsägarna in the autumn of 2012. The main purpose of the study is to get an explanation to why some of the members are passive in their forestry, and how Södra can stimulate them to become more active. To achieve this a questionnaire study was conducted on the members of Södra in the community of Gislaved. The result of the study shows that there are many different factors that influence whether the forest owner is active or not. Examples of those factors are timber prices, the forest owner's objectives and the forest owner's financial situation. The main goal for the forest owners in the survey was to obtain high economic result and to increase the standing timber volume for the next generation.

Secondary schools have for decades debated whether they promote social reproduction which is considered to generate the homogeneous student compositions. The gap between the academic programs and vocational education programs is considered to increase. What in recent years has appeared in research is that the gap is increasing most tend to be in the specific academic program, particularly in science. This paper's intention is to describe the science program at a local level and the pupils who were admitted to the science program autumn 2009 on the basis of an educational sociological perspective. The survey consisted of a census in which all students were given the opportunity to answer a questionnaire.

The popularity of vegetated, or green roofs, has grown over the past years due to their potential function of maintaining urban environment quality. The aim of this study was to investigate if substrates with different organic material, peat and charcoal, with two contents (3 or 6 weight%) influenced the growth of the cuttings during the first critical period of the establishment. Biochar is used as amendment to agricultural soils and has, theoretically, many of the properties suitable as organic content in green roof-substrates. Peat is one of the materials that is commercially used in green roof industry. The substrate has been treated with different amounts of water.

In Sweden, grass is the single largest crop grown. Nearly 1 000 000 Ha grows on the fields, this is primarily used as feed for livestock. To get a good seed, you need to handle the crop carefully from planting to delivery. The part that I have been interested in, is how to dry the harvested seed with out destroying the growth in the small seed. This is very easily done if you aren?t careful during the drying period.

The following essay describes a study made in Sweden in the autumn of 2010 at Södertörn University. The main purpose with this study is to find out and describe how people´s own understanding of being multilingual has influenced them. The objective behind this is to create a wider understanding for the phenomena. Therefore, the phenomenological perspective is used to describe the subjective reflection of a phenomena, in this case multilingualism. A qualitative method is being used for data gathering, implying conversational interviews with six multilingual people born in the 1970s and 1980s.The results show that the people interviewed mostly use their mother tongue in conversations with their parents and relatives today.

Title: Det nya Ryssland - En inblick over Rysslands utrikespolitik under 2000-taletAuthor: Tim Balder and Jens KindhLinnaeus UniversityDepartment of Political ScienceAutumn term 2011The purpose of this thesis is to gain a better understanding of how the Russian foreign policy is, how it is conducted and how it may develop in the future. To do that, we are going to try to answer the following questions:What characterizes Russia's official foreign policy?What theories are there for the Russian foreign policy?How can the various theories explain the Russian foreign policy actions at the international level?Our theory is to try explaining how the Russian foreign policy is continuing its development during the 21st century through three theories known as the Western liberalism, Pragmatic nationalism and Fundamental nationalism. Furthermore, to explain Russia's foreign policy and their behaviour, we are going to use the two foreign policy doctrines from 2000 and 2008. In addition, books and articles will also be used to explain how Russia's foreign policy is conducted and developed..

Title: The battle of the budget ? Communication in a modern policy (Slaget om budgeten ?Kommunikation inom den moderna politiken)Numbers of pages: 39Author: Niclas KarlssonTutor: Peder Hård af SegerstadCourse: Media and Communication studies CPeriod: Autumn 2009University: Division of Media and Communication, Department of Information Science,Uppsala University.Purpose/Aim: The purpose of the paper is to see how Minister of Finance Anders Borg andthe Social Democratic economic spokesman Thomas Östros communicate their messages tothe public.Material/Method: The material is the minutes of the budget debate in the SwedishParliament. The method is rhetorical analysis and content analysis.Main result: Trust making is very important for both of them, especially when the financecrisis reached Sweden. The most common rhetorical quality is ethos.Keywords: Strategic political communication, rhetorical analysis, political trust..