The aim of this work is to demonstrate how the net present value (NPV) at the time of the first thinning depends on the spacing after pre-commercial thinning, and show how net value from first thinning in same stand is influenced. This study is performed with models based on non-distant dependent growth models for single trees. Two different growth models have been used, one for cleaning (pre-commercial thinning) and one for thinning. The first one yields stem density distributed over diameter classes. In the second one, (the thinning model), it is possible to choose when thinning should be done, the thinning method, thinning grade and numbers of thinning.

In the last few years people have become more and more aware of how humanity is affecting the climate. In the direction of reducing the greenhouse gases is to design engines with higher tensile properties and reduced weight, in order to achieve lower fuel consumption and cleaner fuel incineration in today's truck engines.In order to achieve these requirements it?s necessary to increase the combustion pressure in the engine. This requires higher tensile properties and high thermal conductivity of the engine material. The department of Component Technology at the University of Jönköping in collaboration with Volvo Powertrain AB, Scania CV AB and DAROS Piston Rings AB has been commissioned to develop this material and to find knowledge of material properties used in truck engines and piston rings used for marine applications.The purpose with this work is to analyze the tensile properties of a series of cast iron, cast under different metallurgical conditions.Four different series of cast irons have been analyzed from four points of view, carbon concentration, nodularity, amount inoculation and cooling rate.After the tensile test all specimen data was analyzed in a mathematic calculation program called Matlab 2006a.

AbstractPrevious studies have shown that wild smolt have 2.5-4.5 times higher survival rate than smolt grown in culture and that starved reared smolt behave more like wild born smolt. The purpose of this project was to study whether there are differences in migration patterns and survival during migration to the coast between wild and reared smolt and between different types of reared smolt.In 2009, 25 smolts in three different groups were tagged with acoustic transmitters: Wild Born, conventionally reared 2-year and 1 ?year old smolt. For the 2010 trial there was also added a group of reared 2 ?year old smolt that were starved before release.

Bakgrund: I Sverige drabbas vuxna av i genomsnitt en till två förkylningar per år och barnminst dubbelt så ofta. Totalt betalade Försäkringskassan ut 4 656 667 vab-dagar (vård avbarn) under år 2010. Probiotiska bakterier i tarmen konkurrerar med sjukdomsframkallandeorganismer och reducerar dess förekomst i tarmfloran. Om probiotika kan användas för attminska eller åtminstone förkorta sjukdomstiden skulle det vara en enkel metod till en relativtlåg kostnad vilket sparar tid, pengar och lidande för alla parter.Syfte: Syftet med denna systematiska översiktsartikel var att undersöka huruvida ett dagligtintag av probiotika skulle kunna skydda mot eller lindra förkylning, feber ochinfluensasymtom.Sökväg: Litteratursökning i databaserna PubMed och Scopus har genomförts. Sökord somanvändes i olika kombinationer var: probiotics, effect, common cold, fever, flu, influenza,respiratory diseases, lactobacillus och bifidus.Urvalskriterier: Inklusionskriterier vid litteratursökningen var humanstudier i RCT-form därinterventionen varit dagligt bruk av probiotika.

Four different kinds of filter-materials with reactive surfaces have been studied concerning their capacity to absorb heavy metals in leachate from a municipal waste deposit. The heavy metals studied were: lead, cadmium, copper, mercury, chromium, nickel and zinc. The leachate contains high levels of dissolved organic carbon (DOC) and has a high pH-value along with a high buffer capacity. These characteristics of the leachate make it difficult to remove pollutants and require efficient filters. The filters that were examined in the report are blast-furnace slag with CaO, sand covered with iron oxides, olivine and nepheline.

AimThe purpose of this study is to compare the level of activity between playing wii Sports Tennis and wii Sports boxing, and the usual sports, and to see how the two variants are perceived.Issues:- How much strain ratio and energy consumption it gives to exercise wii sports compared with the playing of sport for real?- How do the test participants experience the different tests?- How are the two wii sports games against each other in terms of activity and fitness in the school environment?MethodThis is an experimental study in which 10 test participants (5 men and 5 women) have carried out four different physical tests. The tests consisted of either playing an exergame or playing a sport for 25 minutes. Physical activity was measured during the test using a heart rate monitor. All test participants completed all tests in the same order.

The aim of this study was to investigate whether a direct shift inpostural alignment results in changes in voice source characteristics. Ninemales with untrained voices were recorded standing in ideal posturalalignment and in the deviant postures swayback and kyphosis characterizedby extended hips and a slump back respectively. The voice source wasderived from the audio signal by inverse filtering. The parameters pulseamplitude, maximal flow declination rate, level difference between the firstand second voice source partials, closed quotient and the normalizedamplitude quotient in relation to subglottal pressure were compared betweenideal postural alignment and swayback and kyphosis respectively. Resultsindicate an impact of changed postural alignment on the voice source.Swayback posture gave significantly less pulse amplitude and maximal flowdeclination rate and significantly higher subglottal pressures thus resulting ina less effective phonation.

With increased milkproduction in our dairy cattle, comes a risk for a reduced fertility. Studies performed on animals and humans have shown that it is possible to manipulate the oestrous cycle through exposure to pheromones. This means that pheromones could potentionally be used to make reproduction more efficient. To evaluate the bioactivity of the substances in question, there is need for a bioassay. In insects, pheromones can induce a changed cardiac activity.

This master?s thesis will examine the concept of ?fixed establishment? in VAT-law. The concept can be found in the new EC-directive on the common system of value added tax, however it has existed for thirty years in previous directives. Despite this, the legislator has never provided a proper definition of the concept. Its meaning has therefore evolved through the case-law of the ECJ.The Court has put forward a number of criteria which are all to be met if a fixed establishment is to be at hand.

Unemployment amongst Swedish citizens is higher within the group which falls under the designation foreign-born. The aim of this thesis is to examine which municipal factors that can explain the differences in unemployment amongst foreign-born relative to native born.The empirical models are examined with both cross-sectional data for the year of 2010 and panel data for the years of 2002-2012. The examination is implemented through a linear regression analysis of the type Ordinary Least Squares (OLS) and Fixed Effect regressions. A theory section will be presented where the theory on Non-Accelerating Inflation Rate (NAIRU), theories on discrimination and country-specific human capital are illustrated.The result from the cross-sectional data shows that the amount of foreign-born, the level of foreign-born immigrated from Nordic countries have a significant negative effect on unemployment amongst foreign-born. The general unemployment shows a significant positive effect on the unemployment amongst foreign-born.

There are several ways to identify individuals with dry mouth, but there are few studies made in which the different methods have been compared with each other.The aim of this pilotstudy was to compare different methods for identifying individuals with dry mouth. Fifty individuals aged 50 to 75 years were included in this studie. These where randomly chosen among patients at the dental clinic at Kristianstad University College. Four different salivary measurements were conducted: 1) collection of unstimulated saliva, 2) collection of stimulated saliva, 3) the so called ?mirrortest?, and 4) analyse using cottonrolls.

This bachelor thesis is intended to gather the knowledge and experimental data on the winter wheat crop production relevant for Swedish conditions, with focus on sowing time, row spacing and seed rate. This essay is a literature study with a minor component based on interviews with farmers producing winter wheat. The work is divided into a background part where basic knowledge of winter wheat physiology, development and environment interactions are described and one part where results of field trials studies are presented. Optimal date of sowing winter wheat depends on annual weather variations. Because it is difficult to forecast the weather the choice of sowing date should be based on weather statistics, production experience and previous results depending on sowing date.

Biogas is a gaseous fuel, rich in methane, produced through a biological route in an anaerobic digester. A gas engine generates combined heat and power, which can be used at the farm to reduce energy cost. The process also generates a digestate, with better utilization of nutrient compared to cattle manure. The aim of this study is to analyze the profitability of a farm-scale biogas plant for combined heat and power (CHP) at Wapnö. Wapnö is an agriculture company located in the southern part of Sweden.

Sweden had in the early 1930's the lowest birth rate in the world. Population Commission which was established in 1935 concluded that one of the biggest social problems was the working women?s heavy workload. To deal with the low birth rate reforms and programs were founded both in order to help the women but also in order to support the inadequate motherhood. Government grants were set up to start the so-called vacation home for housewives where the government?s visions of the vacation homes were active rest and recreation.     Based on the Leisure Inquiry report regarding vacation homes for housewives - the purpose of this paper is to examine how the government visions regarding vacation homes for housewives were practiced and how the future of prevailing gender contract affected the holiday home.

Syfte: Syftet är att undersöka svenska storföretags användande av derivatet ränteswap (svensk benämning för interest rate swap) för år 2012 och 2013 samt att undersöka skillnader utifrån tidigare funna bakomliggande faktorer mellan företag som använder olika typer av ränteswaps och företag som inte använder ränteswap.Metod: Studien tillämpade en empirisk totalundersökning gällande de icke-finansiella företagen noterade på Nasdaq OMX Stockholm Large Cap för slutet på år 2012 respektive år 2013. Utifrån företagens årsredovisningar kategoriserades företagen i fyra grupper baserat på företagets användande av ränteswap. Fem tidigare funna bakomliggande faktorer för användandet av ränteswap sammanställdes genomsnittligt per kategori och jämfördes därefter kategorierna emellan.Resultat: Av de största noterade börsföretagen använde 29 av 40 stycken företag ränteswap år 2012 och 29 av 42 företag år 2013. Företag som använde rörlig ränteswap var signifikant större än de företag som inte använde ränteswap för år 2012 och 2013. År 2013 hade de företag som använde fast och båda typer av ränteswaps högre andel kortfristiga lån i jämförelse med de företag som inte använde ränteswap.