Ocean Thermal Energy Conversion, OTEC, a technology using the temperature difference between cold deep seawater and warm surface water, can extract the work in the form of electricity. OTEC gives also synergies of drinkable fresh water. The temperature difference has an impact on the efficiency of the technology, which means that the feasibility of OTEC is geographically limited. The project intends to explore the possibility of replacing the atoll Tarawa?s present electricity generation with an OTEC plant and to explore synergies. In the present situation all of Tarawa?s electricity is generated by fossil fuels.

Better, more efficient fertilizers with great productivity and economic returns are needed, but it is important today to find fertilizers that are also sustainable. It is also important to carefully monitor their impact on the environment, including potential side-effects. In this context, the microbial communities that carry out numerous essential functions contributing to a functional ecosystem are of particular interest. The present study is a complement to a pot experiment that investigated the potential of different waste products for use as fertilizers and how they affect the microbial community. In the pot experiment, the clearest treatment change in microorganism community function was found in the fully fertilized treatment used as a positive control. The question was whether this was indirect, i.e.

The safety and safety work on OKG, Oskarshamns Kraftgrupp, is supervised by SKI, Swedish nuclear power inspectorate. The task of SKI is to inspect that the nuclear power plants of Sweden runs in a safe way. The proprietor of the permit who runs nuclear power plants has the responsibility to maintain the required safety to run a plant. SKI publishes a number of statue books that OKG has to meet to be able to run the plants. SKI recommends in SKIFS 2 004:1, that OKG work with the safety requirements of IAEA.

Ocean Thermal Energy Conversion, OTEC, a technology using the temperature difference between cold deep seawater and warm surface water, can extract the work in the form of electricity. OTEC gives also synergies of drinkable fresh water. The temperature difference has an impact on the efficiency of the technology, which means that the feasibility of OTEC is geographically limited. The project intends to explore the possibility of replacing the atoll Tarawa?s present electricity generation with an OTEC plant and to explore synergies. In the present situation all of Tarawa?s electricity is generated by fossil fuels.

En studie av en mindre kraftstation har gjorts i samarbete med Exencotech som forskar inom energi-återvinning. Deras kraftstation behandlar återvinning av värme från uppvärmt vatten som annars inte hade använts utan ansetts som ren förlust.Den studie som genomförts har gjorts på ett 100kW system med en så stor möjlighet till modularitet som är möjligt för anpassning och flexibel installation. Studien har även innefattat en 5kW prototyp och en modulär version av 100kW systemet upp till 0,5MW. Applikationen har som krav att framför allt minska volymen och storleken på systemet. Studien innefattar även en ergonomisk och användarvänlig inriktning vilket har påverkat designen och konstruktionen hos systemet.För att finna lämpliga lösningar och koncept till projektet har flera konceptgenereringar gjorts, liksom utvärderingar av lösningar.

SUMMARYInventory of raw materials holds an important role in companies within the manufacturingsector. The inventory works as a buffer that secure the supply of materials to the productionunit. The aim of the inventory is to ensure that the company is able to meet the customers?demands despite fluctuations and variations in the material flow. The size of the warehouseand the layout are physical limitations for the quantity of articles that can be stored.

The study was performed for the Swedish Regional Forestry Board in Södra Götaland. The study examines broadleaf plantations on former farmland that were planted between 1991 and 1996 with subsidy payments for conversion of farmland into forest. In particular, the study reviews forests planted in 1991-92 and 1994-96. In the early 1990s, Swedish agriculture was deregulated and direct subsides to farmers ended. The Swedish state instead granted farmers financial support and offered incentives for conversion of farmland and investments in order to make their unproductive land productive. The state supported conversion of farmland to broadleaf forest, forest for energy biomass production, or establishment of wetlands on former farmland. The County Administrative Boards and Regional Forestry Boards together monitored the planting of broadleaf forests.

In Sweden, reduced tillage usually means non-inversion tillage, where primary tillage is carried out using chisel ploughs or disc implements. Primary tillage method is mainly determined by the desired soil loosening and the handling of soil residues. The effect of tillage depth was studied in field experiments in Skåne, Väderstad, Uppsala, Örebro och Västerås in different crops; spring oilseed rape, spring wheat, winter wheat and spring barley.The experiments generally had a randomized block design with the treatments mouldboard ploughing, deep chisel ploughing and shallow chisel ploughing, in some cases also shallow discing and no-tillage. In the experiments the following parameters were determined: seedbed properties, saturated hydraulic conductivity, penetration resistance, number of emerged plants and crop yield (all parameters were not determined in all experiments. Root growth and draught requirement were determined in two separate studies. There were no significant differences between tillage depths in non-inversion tillage in seedbed properties, plant emergence or root development.

Laser for material processing possesses a number of advantages which mean that it has been and will be an important component for a wide range of industries' future development. Cutting materials processing is the dominant use of laser technology and has revolutionized the manufacturing industry. The aim of this thesis is to describe the principles of metal cutting by laser, how laser cutting is applied in practice and to identify how Swedish companies are using laser cutting. For the theoretical and technical description of laser cutting literature studies are the primary source of information. The empirical basis for the mapping of the Swedish industry for laser cutting is grounded on a survey; this includes Swedish companies that use laser cutting in their production.

SUMMARYInventory of raw materials holds an important role in companies within the manufacturingsector. The inventory works as a buffer that secure the supply of materials to the productionunit. The aim of the inventory is to ensure that the company is able to meet the customers?demands despite fluctuations and variations in the material flow. The size of the warehouseand the layout are physical limitations for the quantity of articles that can be stored.

SUMMARYInventory of raw materials holds an important role in companies within the manufacturingsector. The inventory works as a buffer that secure the supply of materials to the productionunit. The aim of the inventory is to ensure that the company is able to meet the customers?demands despite fluctuations and variations in the material flow. The size of the warehouseand the layout are physical limitations for the quantity of articles that can be stored.

Luftburen försörjning har internationellt varit ett nyckelverktyg för större stater i snart 70 år. Att som militärenhet kunna agera och påverka motståndaren via de platser denne är som svagast och inte har förmåga att se våra lösningar, gör att vi kan skapa överlägsenhet och skapa taktiska fördelar. All militär verksamhet är i behov av förnödenheter och ett logistiskt stöd. För att detta stöd skall kunna nå enheter långt borta under svåra förhållanden, måste organisationen skapa förutsättningar till handlingsfrihet. I omvärlden har metoden luftburen försörjning varit en självklar del i det flexibla och föränderliga stridsrummets logistiska stöd.

In the production of pulp, paper and cardboard, a large amount of water is used daily. The water has to be purified in the internal purifying plant before it reaches the receiving body of water. In the biological purifying stage at the Stora Enso Skoghall mill, an aerated basin is used where the microorganisms, using oxygen, oxidize the organic material to carbon dioxide. The air is pumped from the bottom of the basin and the oxygen can then be transported from the air bubbles to the water through diffusion. The problem with aeration of waste water from the forest industry is that wood residues, such as fatty acids, are making the transport of oxygen in water more difficult.

Bakgrund och problem: Returlogistik har hitintills varit ett oprioriterat område både inom akademin och i näringslivet, men har på senare tid fått allt mer uppmärksamhet. Många företag arbetar med returflöden eftersom flöden tillbaka från kund förekommer i de flesta branscher, men det är inte något som företag fokuserar på i samma utsträckning som de traditionella materialflödena. Att skapa ett effektivt materialflöde i försörjningskedjan är ingen enkel uppgift, vilket även i allra högsta grad gäller för utformningen av returflödet. Hanteringsprocessen är en viktig del av returlogistiken där varje returprocess kan skilja sig beroende på typ av produkt och hur en organisation ser ut i övrigt. För många företag krävs en lyckad hanteringsprocess för att skapa ett hållbart miljöarbete och lönsamhet i verksamheten.Syfte: Syftet med uppsatsen är att undersöka hur en effektiv hanteringsprocess kan uppnås genom att granska dess krav och förutsättningar samt ta reda på vilka fördelar det kan generera.

Landstinget i Östergötland upphandlar sedan 2001 samtliga godstransporter från externa leverantörer. Detta examensarbete har som syfte att inför en kommande transportupphandling 2006 utreda behovet av godstransporter och hur kostnaderna för dessa transporter ska fördelas inom Landstinget i Östergötland. Målet var att förenkla existerande avtal och ta fram en lösning på hur förändringar av transportnätet ska kunna hanteras med minimal administrativ arbetsinsats. Lösningen skulle också innebära att landstingets kostnader kunde hållas låga.Studien har visat att det genom att standardisera transporttider går att förenkla transportavtalen avsevärt. Transportören erbjuds också större frihet att anpassa landstingets körningar till övriga uppdrag, vilket möjliggör lägre priser.