The interest in small-scale electricity in Sweden has increased strongly in recent years. The interest is noticeable both among politicians to increase the share of renewables in the energy mix, and among electricity consumers to partially replace purchased electricity with self-produced. This has resulted in a significant increase of electricity production in low voltage grids in recent years, and the trend appears to continue in the coming years. The majority of the new production plants are solar cells, followed by wind turbines, and it is also in these the greatest efforts are made in this paper.Distributed generation is often seen as something positive since it will contribute to reduced transmission losses and reduced voltage drop in the networks, and that it increases the share of electricity from renewable sources. In cases where the grids are not strong enough, or in other ways not adapted to manage the installed production, power quality may be adversely affected.

The purpose of this thesis is to evaluate and update load curves for Fortum Distribution AB. Theload curve method is a tool used to forecast the strain of an electric grid. The method is based oncustomer annual energy consumption, outdoors temperature as well as customer category. Theload curve method was established by Svenska Elverksföreningen at the start of the nineties andfocus was put on standardizing annual energyconsumption, in order to make the method usableacross the nation. Present consumption patterns have changed since the original load curves wereproduced, which leads to a need to update the load curves.The work began with an update of present load curves according to recommendation taken fromanother earlier thesis.

The concentration and storage of organic chlorine and chloride were determined in soil, to a depth of 40 cm, in a coniferous forest in the Stubbetorp catchment area in south-east Sweden. Also, the spatial distribution of the two forms of chlorine was determined. Soil samples were collected at 49 of the nodes in a grid with approximately 105 m between the nodes. The analysis of spatial variability suggested that no spatial autocorrelation was present either within the variable organic chlorine or chloride. This means that no sample was more influenced by another nearby sample, as compared to other samples further away.

Through our study we have found that there are moresimilarities than differences in leadership styles. The dominant leadership style of managers in both private and public sector is the democratic leadership style, often in combination with other styles; most notably the authoritarian leadership style. The charismatic leadership style doesn't seem to be popular in neither private nor public sector.Title:                                                                              A study of leadership styles in public and private sector Course:                                                    Bachelor Dissertation - LeadershipAuthors:                                                  Milos Kostic and Rudina ShabaniAdvisor:                                                   Ingemar WictorKeyword:                                                Leadership style, public, private, leadershipProblem formulation:          What differences and similarities in leadership styles are there between managers in private companies and managers in public companies?Purpose:                                                  Our purpose has been to find which similarities and differences there are in leadership styles between managers in private sector and managers in public sector.Theoretical framework:       After studying the theory of leadership, we found four different leadership styles relevant to our study. In the theoretical framework we discuss theories of authoritarian leadership, democratic leadership, laissez-faire leadership and charismatic leadership.

The interest in small-scale electricity in Sweden has increased strongly in recent years. The interest is noticeable both among politicians to increase the share of renewables in the energy mix, and among electricity consumers to partially replace purchased electricity with self-produced. This has resulted in a significant increase of electricity production in low voltage grids in recent years, and the trend appears to continue in the coming years. The majority of the new production plants are solar cells, followed by wind turbines, and it is also in these the greatest efforts are made in this paper.Distributed generation is often seen as something positive since it will contribute to reduced transmission losses and reduced voltage drop in the networks, and that it increases the share of electricity from renewable sources. In cases where the grids are not strong enough, or in other ways not adapted to manage the installed production, power quality may be adversely affected.

Bristly swan-neck moss (Campylopus atrovirens) is in Sweden a very rare moss that only grows on a few blocks and cliffs around Gothenburg. The species can globally only be found in areas with high precipitation. Rain fall in Gothenburg has increased with a stronger greenhouse effect. Air pollution in Gothenburg has also improved. Mosses generally benefit from these conditions and this papers hypothesis is that the population of the species has grown because of these more beneficial conditions.

En metod för att simulera exteriört bussljud med hjälp utav Ray Tracing har testats och utvärderats. En modell av en buss har byggts upp i ett CAD program. Dominerande ljudkällor i bussen samt materialkoefficienter har tagits fram för de material som ingår i bussen. Bussen har sedan förts in i simuleringsprogrammet Odeon, där ett antal simuleringar har utförts. Olika pass-by simulering har utförts och jämförts med mätningar.

Syftet med denna rapport är att noggrant redogöra för och analysera de fråge-ställningar som satts upp och samtidigt beskriva utvecklingsarbetet av ett datoriserat system för att hantera bokningar och för SMS-notifiering.De frågeställningar som, i denna rapport, besvaras är:1. Går det att skapa ett datoriserat bokningssystem som bidrar till att Bärarelagets arbetsprocess effektiviseras men som samtidigt är lätt att lära för användare med liten eller ingen datorvana?2. Går det att vidareutveckla det som redan gjorts för att besvara frågeställning 1?Bärarelaget är ett företag som specialiserat sig på kompetensuthyrning där mobilkranar, kranbilar och truckar behövs.

The automotive market is currently undergoing a historical change where stricter emission legislations and ever increasing fuel costs have intensified the search for effective alternatives to the conventional internal combustion engine, which has resulted in a substantial trend towards electrification of powertrains. Storage of electrical energy is the fundamental component in this technology where the lithium-ion batteries are currently considered as the most appropriate solution. Lithium-ion batteries, however, as other types of batteries, can only be used efficiently and durably within a specific temperature range.This Master thesis has been carried out in collaboration with Electroengine in Sweden AB, situated in Uppsala, which has an ongoing project regarding development of a modular battery system for electric powertrains. The project is at a stage where an initial prototype has been developed which provides the foundation for this thesis. The study has addressed the battery system performance from a thermal perspective, in order to validate the ability of the system to create a thermally serviceable environment for the lithium-ion battery cells.

The scope of this project is to make a comparison of costs associated with wind and nuclear power in order to decide which one of these is the most suitable in the case of an increased demand for electricity. It is also investigated if there are other factors that can influence the choice of energy source.An average cost is calculated in terms of kronor per kilowatt-hour (SEK/kWh) using cost of investment, operation & maintenance and taxes & subsidies. Total investment cost is recalculated to production cost using the annuity method at three different interest rates (6%, 9% and 12%).The comparison is made between three cases of wind power and two cases of nuclear power. For wind power there are two ocean-based (300MW and 100MW installed capacity, respectively) and one land-based (60MW) wind farm. For nuclear power there is one EPR-reactor (1600MW) and one AP1000-reactor (1100MW).

Berggren, O. (2014) COMSOL Multiphysics ? Ett energitekniskt analysverktyg vid numerisk simulering av köldbryggor och analys av fukt i konstruktionsdetaljer. Examensuppsats i ämnet energiteknik. Institutionen för tillämpad elektronik och fysik vid Umeå Universitet.Konsultföretaget Tyréns har vid sitt kontor i Umeå önskat att utvärdera tillämpningen av programvaran COMSOL Multiphysics.

Through our study we have found that there are moresimilarities than differences in leadership styles. The dominant leadership style of managers in both private and public sector is the democratic leadership style, often in combination with other styles; most notably the authoritarian leadership style. The charismatic leadership style doesn't seem to be popular in neither private nor public sector.Title:                                                                              A study of leadership styles in public and private sector Course:                                                    Bachelor Dissertation - LeadershipAuthors:                                                  Milos Kostic and Rudina ShabaniAdvisor:                                                   Ingemar WictorKeyword:                                                Leadership style, public, private, leadershipProblem formulation:          What differences and similarities in leadership styles are there between managers in private companies and managers in public companies?Purpose:                                                  Our purpose has been to find which similarities and differences there are in leadership styles between managers in private sector and managers in public sector.Theoretical framework:       After studying the theory of leadership, we found four different leadership styles relevant to our study. In the theoretical framework we discuss theories of authoritarian leadership, democratic leadership, laissez-faire leadership and charismatic leadership.

This thesis compares different methods for risk assessment of a creosote contaminated site in Vansbro, Dalarna. In a complementary study the importance of using representative data for calibration and validation of stationary groundwater models is discussed. The time dependency between surface water levels and groundwater levels on the site in Vansbro is evaluated by step response analysis. The results show that the groundwater levels reflect only long-term variation in the surface water levels. Hence the use of such long-term means for calibration and validation of the stationary groundwater models is the only theoretically defendable alternative.As a first step in the comparison of risk assessment methods the degree of contamination is evaluated on the basis of generic guideline values for contaminated soils, developed by the Swedish Environmental Protection Agency.

Då ett eventuellt förbud av nya kreosotimpregnerade stolpar kan bli en verklighet inom EU år 2018 letar Vattenfall efter andra alternativ. Stål, betong, limträ och komposit anses idag vara de mest konkurrenskraftiga alternativen och kommer att undersökas i denna rapport. Grundläggande tekniska egenskaper, miljöutsläpp och kostnader för de olika stolptyperna kommer att analyseras i rapporten och jämföras mot den kreosotimpregnerade furustolpen. Rapporten beskriver hur de olika stolpalternativen lämpar sig i Vattenfalls elnät i Sverige.P.g.a. sekretesskäl kommer exakta prisuppgifter inte att redovisas.

The focus of this thesis is the group as a pedagogical tool. It investigates whether and how what is known of group size can help further schools in fulfilling knowledge and democracy goals and moreover how such knowledge can influence the principals? management. The mission of school education is to provide the basis for each pupil?s individual development and in the end it is pupils? individual performances which are graded.