Using biofuels from regeneration cuttings is becoming more common in Sweden. Ash from the combustion of biofuels contains many valuable nutrients and base cations. The Swedish Forest Agency recommends that ash should be recycled to clearings where biofuels have been removed, to avoid future impoverishment of Swedish woodlands. In Jämtland, in northern Sweden, a large quantity of biofuels are taken out from cuttings but ash recycling has not yet been tried. The aim of this thesis was to examine the conditions for ash recycling in Jämtland regarding to soil chemistry and heavy metal content in soil and biofuels.

This thesis is a survey and also an investigation of the different factors that affects the cracking that occurs in the inserts at AB Sandvik Coromants production in Gimo. The work that has been done has focused on two main factors, namely, powder characteristics and pressing parameters.AB Sandvik Coromant produces tools and tooling systems for Metal cutting. They have some problems in their production of inserts. The problem is that cracks sometimes occur in the body of the insert, after it´s pressed. In order to investigate this, a preliminary study was made in which production principles were studied.

As the Swedish governments long term goals include a reduction of fossil fuel dependency, increasing pressure is placed upon energy companies to create and develop new solutions for renewable energy. The following case study was done in collaboration with the company Sydved Energileveranser AB and one of their contractors, Enarssons Skogsentreprenad AB. The objective of the study is to examine the bioenergy situation in region of Skåne and evaluate the potential solutions in the region for a forest-fuel assortment, based on a bioenergy-cutting-system. As a part of this study I have compared ordinary manual cuttings done with a chain saw and cuttings made using the new ?bio- energy cutting system?. The cuttings made under both systems were tested in areas near agricultural fields or pasture land in order to maintain an open landscape.

Uppsatsen granskar det spänningsförhållande som existerar mellan Hårdrockens uttryck och den oinvigda allmänhetens moralpanik. Genom självpresentation och smakdistinktioner undersöker den också hur Hårdrocken idag har positionerat sig som en etablerad kultur med ursprung och tradition. På så sätt behandlar uppsatsen vad och vem som definierar Hårdrockens kulturella värde och position. Undersökningen görs genom en textanalys av den svenska hårdrockstidningen Close-Up Magazine. Uppsatsen granskar även hur tidningen positionerar och presenterar sig som betydande aktör inom Hårdrockens verksamhetsfält..

An investigation of the heat impact of laser cutting on the material properties when producing tensile and impact test specimens of different steel types of varying thickness has been performed. The purpose of the thesis project was to provide recommendations regarding how much material that needs to be milled from the laser cut edge before tensile and impact tests. The study has been performed partly by investigating the test specimens by heat camera when the specimens were cut in the laser cutting line and partly by performing hardness tests, investigation by microscopy, and tolerance and roughness measurements and tensile tests of the laser cut material and material produced in the traditional multi operation machine. The results show that the heat affected zone in the thicker materials is greater than previously thought of, and that the currently used recommendation has to be adjusted. The study clearly shows that the thicker the material, the greater the heat affected zone, independently of the steel type, since the thicker material takes longer time to cut.

Increased understanding of the mechanisms that operate in conjunction with the welding of metal surfaces may help to improve existing manufacturing processes, and to enable new products and combinations of materials. The purpose of the project has therefore been to acquire a deeper understanding of what is happening in the bond for steel and for the factors that form the basis for a bond to develop between metals in the production of laminates by pressing. The merge has been done by pressing and the surfaces after the experiments have been studied in detail in the scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX) and with interferenceprofilometry in Wyko, to provide a greater understanding of the mechanisms that influence the bonding in the interface between metals. The project was limited to contain the materials Docol 1000, HyTens 1200, Aluminum AA3003 and a commercial steel. The parameters varied in the experiments to study their influence closer are temperature, pressure, heat treatment and pretreatment. This has been implemented by pressing with varying temperature and pressure.

The purpose of this thesis is to examinethe possibilities for adding a floor to anexisting building using the two materialswood and sheet metal profiles as the loadbearing structure. An apartment buildingfrom the 60s has been used as referencehouse. Two different suggestions for thedesign are presented in the rapport. Oneof them has been analyzed with wood andsheet metal as the load bearing structure.Using the old constructional calculationsand blueprints of the existing buildings,the load bearing capacity has beencalculated. In the calculation programFEM-Design the building has been testedwith the loads that an extra floor wouldgive.

På uppdrag av Skärteknikcentrum Svergie AB i Gislaved gjordes en undersökning av driftstörningarna i produktionsprocessen hos tre olika medlemsföretag som kunde kopplas direkt till kvalitet på stångmaterialet som används. Undersökningen gjordes hos Gnosjö automatsvarvning AB, Finnveden Powertrain (Alvestafabriken) och Bufab Lann AB, alla arbetar med stångmaterial och har liknande tillverkningsprocesser. Uppgiften gick ut på att identifiera ifall det finns driftstörningar som enbart är beroende av kvaliteten på materialet samt vilka problem de leder till. Efter genomförda undersökningar och en större inblick hos de olika företagen konstaterades det att variationer i kvaliten på materialet har en effekt på hur produktionsprocessen fungerar. Störningar i produktionen kan reduceras ifall materialet egenskaper förbättras eller tillverkningsprocessen ändras.

Den här undersökningen fokuserar på hur skivomslagen ser ut inom hiphop och glam metal i Sverige i en jämförelse över tid. Undersökningen ska även besvara de förändringar eller icke- förändringar som skett, samt hur kulturen påverkar utformandet av skivomslag inom varje musikgenre. Syftet är att får en ökad förståelse och inblick i kopplingen mellan musikgenre och bild i utformandet av skivomslag. Med hjälp av den semiotiska bildanalysen har skivomslagen analyserats under två olika tidsperioder. Resultaten av analyserna visar att båda musikgenrerna har gått över till mer tolkningsbara skivomslag.

SECO Tools manufactures tool inserts for all types of Metal cutting machining. (Ti,W)C is a common raw material used in the production. At arrival, the material (Ti,W)C is always analyzed. Titanium has previously been analysed with x-ray fluorescence spectrometry, but as the calibration has previously been performed with two different types of titanium (rutile and metallic titanium), the results has differed. Because of that, this thesis project has been devoted to analyze titanium, to find the best titanium compound for producing standards.The work has been performed using literature studies and many experiments in the laboratories at SECO Tools inFagersta,Sweden.

Den här undersökningen fokuserar på hur skivomslagen ser ut inom hiphop och glam metal i Sverige i en jämförelse över tid. Undersökningen ska även besvara de förändringar eller icke- förändringar som skett, samt hur kulturen påverkar utformandet av skivomslag inom varje musikgenre. Syftet är att får en ökad förståelse och inblick i kopplingen mellan musikgenre och bild i utformandet av skivomslag. Med hjälp av den semiotiska bildanalysen har skivomslagen analyserats under två olika tidsperioder. Resultaten av analyserna visar att båda musikgenrerna har gått över till mer tolkningsbara skivomslag.

In the last decades, high speed cutting has become an attractive technology in the wood industry. The possibility of reducing global costs in addiction with an increase in productivity, were the main reasons for the enlargement of the use of this technology. As usual, these advantages are accompanied by disadvantages that should be carefully analyzed. If on the one hand cutting forces are reduced with increasing cutting speeds, on the other hand, the centrifugal forces affecting the tool are higher. Exposed to such high loads, there is a considerable risk of tool failure that embeds hazards for both machine and workers.

The industrialization in Sweden has increased the large number of areas that have been contaminated with various types of pollution. One of those sites are the property Höjen 3:24 in Arboga where ?Arboga Mekaniska Verkstad? once been. The property wants to increase the use of the old former foundry building with the adjacent ?plate-workshop? and believe there are two options for the building: That the building either should be used as a warehouse/concert hall, or rebuilt into a cultural center. An environmental evaluation has shown that the levels of heavy metals are over the Swedish environmental protection agency guidelines of less sensitive land.

An investigation of the heat impact of laser cutting on the material properties when producing tensile and impact test specimens of different steel types of varying thickness has been performed. The purpose of the thesis project was to provide recommendations regarding how much material that needs to be milled from the laser cut edge before tensile and impact tests. The study has been performed partly by investigating the test specimens by heat camera when the specimens were cut in the laser cutting line and partly by performing hardness tests, investigation by microscopy, and tolerance and roughness measurements and tensile tests of the laser cut material and material produced in the traditional multi operation machine. The results show that the heat affected zone in the thicker materials is greater than previously thought of, and that the currently used recommendation has to be adjusted. The study clearly shows that the thicker the material, the greater the heat affected zone, independently of the steel type, since the thicker material takes longer time to cut.

Through wing pattern, posture and movement, a harmless moth of the family Brenthia imitates an eight-eyed jumping spider. When an octopus of the species Thaumoctopus mimicus sense danger it can alter its appearance to that of a venomous sea snake. They are both drawing attention to themselves. Nevertheless, and because of this, they are protected. The mechanism is called mimicry.