The prevailing food and energy crisis of the world, due to the declining reserves of fossil energy and a never ending rise of consumption, forces us to look into new fields to supply our energy demand. The boom of bio energy is criticized, as food crops are used to provide biodiesel and ethanol and the volumes are ridiculously small to supply world demand. Algae are one of the world?s oldest life forms and exist in many different phyla, providing a great variety to choose from, for different purposes. Cultivating microalgae offer a way to produce energy at great volumes without competing with food production and at the same time the algae offer a way to use our expensive nutrients in a more efficient way, besides this the algae are carbon dioxide neutral since their carbon source can be supplied by the atmosphere and the additional energy required can be supplied by algal oil or other renewable sources.

The aim of this study was to evaluate the stir drying method, for drying of grain during Swedish conditions. The evaluation was done during the harvest year 2004, on four farms with stir driers. The driers were evaluated for their energy consumption, design, stirring effectiveness and how much time the farmer has to spend on every tonne of grain. A comparison was also done with conventional Swedish high temperature driers. Totaly six batches of grain from stir driers were examined, mostly winter wheat, but also barley and wheat.

The current situation for Swedish grain farmers facing a situation with decreasing profitability makes it necessary for the farmers to find ways of increasing the margins in their grain growing. Decreasing profitabilities along with Lantmännens closing of grain elevators contribute to the necessity for farmers to invest in grain storing and drying at the farm. By investing in capacity for drying and storage of grain on the farm it is possible to recieve a higher price on the grain sold due to the possibility to sell when the price is higher compared to the harvesting season. An investment in grain drying and storage with a relatively low investment cost that recently has appeared on the Swedish market is the grain stir drying system. This study contains a comparison of an investment in a grain stir drying system where the grain is dried and stored in the same silo and a conventional drying and storage system.

Could patterns change the way we as consumers feel about a product as it ages and wears down? Why do some products increase their value as they are being worn downand others do not? Could the same affection that increases with your favourite jeans or an old, worn down, scratched and beautiful wooden furniture, be applied on otherproducts with different ability?s and history?The goal was to explore patterns and beautiful aging in products to increase the consumers desire to keep the well used product a little bit longer. Not to prolong the products ?lifetime? from brand new till it?s no longer inhabit their main function, but at that precise momentwhen you as a consumer decides to through it away in favour for a new, updated version. To buy ?new and fresh?.Patterns with different expressions, colouring and size, were explored that increase the value of a product which in this project contained handles and varies of surfaces on casseroles, frying pans, whisks, cutlery etc.

The aim of this thesis was to investigate if the robotized welding method FSW (Friction Stir Welding) could be applied for joining a rotating structure in an aero engine at Volvo Aero Corporation. FSW is expected to introduce less defects than today?s welding methods and could therefore be suitable for critical aero components. The material is the nickel based alloy Inconel 718, however a material experimentation is outside the scope of this report.The main goal of this study is to verify if the ESAB ROSIO robot based FSW-system has a suitable work space to be able to weld the rotating structure, and if the welding tool has accessibility to the joints. The FSW-process needs a rigid fixture, and a number of fix-ture concepts are presented based on a proposed weld sequence.

The aim of this essay is to see how various texts, both Swedish and foreign, have described the former Swedish colony of St. Bartholomew. The focus has been on the slaves on the colony, and here how they were treated and how the analyzed authors portray the slaves lives.The literature has been divided up into two different categories, based on when they were published. The distinction has been made by dividing them up into a contemporary cluster, that were published before the 1900?s, as opposed to the more recent literature, from after the 1900?s.

The aim of this thesis was to investigate if the robotized welding method FSW (Friction Stir Welding) could be applied for joining a rotating structure in an aero engine at Volvo Aero Corporation. FSW is expected to introduce less defects than today?s welding methods and could therefore be suitable for critical aero components. The material is the nickel based alloy Inconel 718, however a material experimentation is outside the scope of this report.The main goal of this study is to verify if the ESAB ROSIO robot based FSW-system has a suitable work space to be able to weld the rotating structure, and if the welding tool has accessibility to the joints. The FSW-process needs a rigid fixture, and a number of fix-ture concepts are presented based on a proposed weld sequence.

A large amount of our time is spent indoors in an artificial climate. To make the experience pleasant there are requirements on the ventilation and the heating system. At the present time the most common form of heating is a radiator system complemented with a ventilation system. A ceiling heating system with combined heating and ventilation can replace the two separated systems. The benefit with a ceiling heating solution is that it saves space since the radiator system is no longer needed.

Syftet med den här uppsatsen är att undersöka hur genus - vårt socialt skapade kön skapas i en musikpedagogisk verksamhet. Finns det någon skillnad mellan pojkar och flickors intresse i ämnet musik, val av instrument eller agerande i undervisningen? Hur bemöter eleverna varandra, hur bemöter läraren eleverna och tvärtom ur ett genusperspektiv? Studien utfördes på en grundskola i klasserna sju och nio med hjälp av observationsmetoden och videokamera. Resultaten visade på skillnad mellan könen genom att pojkarna generellt dominerade musiklektionen genom att prata, bråka och ta mer uppmärksamhet än flickorna. Undervisningens innehåll och lektionstid blev kraftigt negativt påverkad då lärarens uppmärksamhet riktades åt pojkarnas bråk.

The requirements of good quality and appetizing fast food increases continuously as a consequence of a community where food is always available. The crispiness of French fries is an issue that must be considered in this context, since it tends to decrease and give the fries a soft surface not appreciated by the consumer. To prolong the crispiness, the fries can be coated by a batter, a mix of starches. The batters used often consists of modified starches, e.g. cross-linked, acetylated and dextrinizated to increase and prolong crispiness, flour to stabilize the batter and sodium bicarbonate to make the batter ?rise?.The cross-linked starch keeps the granules in a swelled state and prevents them from breaking when exposed to heat or processing: therefore, it delays the gelatinization and decreases the stickiness of the batter.