Discharge of untreated wastewater leads to unnaturally high levels of nitrogen and phosphorus in rivers, lakes and the sea, which results in unbalanced ecosystems with eutrophication and lack of oxygen. Part of the phosphorus in surface waters is coming from on-site wastewater treatment from scattered households with unsatisfactory purification. Blast furnace slag is a by-product from iron production, and has in laboratory trials showed good phosphorus binding capacity. To test blast furnace slag as a reactive filter media for phosphorus separation in a full scale experiment, a wastewater treatment plant has been built behind the picnic area at Ångersjön alongside the road E4 in central-eastern Sweden. The plant contains two parallel lines, one with blast furnaces slag and the other with Filtralite-P as phosphorus sorbent. Both filters have showed decreasing phosphorus purification effect with time in spite of a low wastewater load.

Har riten en djupare mening, ett arv vi bär med oss och känner ett undermedvetet behov av? Kan riten ge oss tröst? Vad har riten för betydelse för oss?I mitt examensarbete har jag undersökt hur vi genom riten reflekterar och knyter an till erfarenheten av att vara människa. Jag har tittat på om riten finns i vår vardag, utan att vi ser den. Kan de olika upprepande och igenkännande handlingar i ett hem ge oss den trygghet som en rit kan ge? Riten kännetecknas genomkontinuitet, igenkänning, tillhörighet och tröst.

This essay is a study of the market strategies and situations in the telephone business. Our problem was to examine the telecom companies´ strategies to stay competitive and cope with the new VoIP technology. We chose to do a qualitative study and four telephone interviews were made with Swedish and Dutch companies. We investigated three different categories of companies in the market; industry leaders, cable companies and broadband companies to get a broad view of the market. The theory chapter is based on different strategies that companies have to or can apply to get ahead, stay or survive in a hypercompetition.

To invent an optimized product is a complicated process. This process is only half of the work. It is equally important to develop a production system that can produce the product in an  efficient and ergonomic way.After several evaluations of conceptual and detailed drawings a final idea has come to light.The idea intends, to the maximum extent, utilize the facility in a more efficient way through moving assembly lines and stations closer to the flock section and the stock for complete products. To make the production better, stations are placed in more logical places given the assignment they are supposed to accomplish. This improves the material flow radically.

This paper will discuss the proposed reintroducing of a final degree in upper secondary school. In a public government inquiry that was released in March 2008 a proposal about reintroducing a final degree in upper secondary school was presented. A final degree has not been a part of the upper secondary school science 1968. Why was the system with a final degree abounded and why do the government want to reintroduce it?Research in pedagogy has through the years presented numbers of theories about assessment.

Syftet med denna uppsats har varit att undersöka hur svenska små- och medelstora företag anpassar sig till de marknadsförhållanden som råder inom Afrikas Bottom-of-the- Pyramid. Studien har följt en kvalitativ forskningsmetod samt tillämpat fallstudie som forskningsstrategi. Detta för att erhålla en djup insyn i företagens agerande och hur de anpassat sig för att vara förmögna att företaga på en marknad vars förutsättningar inte är i närheten av idylliska.Studiens teoretiska utgångspunkt implicerar huvudsakligen Bottom-of-the-Pyramid konceptet, konkurrensstrategi, kooperativ strategi, nätverk, affa?rsrelationer samt de fyra A:na. Vidare redogörs fyra fallföretags upplevelser från BoP-marknaden i empirin; varför valde de denna marknad, vilka möjligheter ser de den besitter, vilka krav har den ställt på dem och hur har anpassningen till denna marknad gått till.I analysen förenas vår teoretiska referensram med det insamlade empiriska data där de ställs gentemot varandra i en diskussion kring i vilken utsträckning teorin stämmer överrens med empirin.

The goal for this master thesis project has been to investigate the power quality in adistribution grid, which has a high fraction of dispersed power production due towindmills. The study has been done on a grid in Laholm South of Halmstad, whereapproximately 45 windmills are connected to the distribution grid owned by SHKEnergi. The investigation has been focused on to two radialy fed 20 kV lines, wheretwelve windmills are connected.Voltage variations have been studied by creating a model of the grid in the simulationprogram SIMPOW. The largest deviation that has been found in any point of the gridis ±1.9 % of the nominal voltage. This deviation is a result of varying powergeneration from the windmills and the voltage regulation at the connection point ofthe line.

This degree project handles acoustic measurements of the heat pump EcoAir 107, made by Enertech CTC AB. The sound from the three sound sources of the heat pump, fan, compressor and four way valve, have been measured to find out how they affect the total sound level of the product.Measures to attenuate the sound level have been developed and tested. By comparing these with the sound of the heat pump, in its original state, we have found out the measures which have best effects.The best attenuating measures came to be: taped openings and holes around the compressor space, isolating the top and the bottom of the whole construction, support of the fan bottom part and shielding of the sound source with a screen at a distance of 110 mmThese measures have been tested together and an average attenuation of the total sound level with 3,9 dB have been accomplished. In the front of the fan where the continuous sound is the strongest, the attenuation was 4,7 dB.This project is meant to be used as a guide by Enertech CTC AB:s during their future developing process..

The goal for this master thesis project has been to investigate the power quality in adistribution grid, which has a high fraction of dispersed power production due towindmills. The study has been done on a grid in Laholm South of Halmstad, whereapproximately 45 windmills are connected to the distribution grid owned by SHKEnergi. The investigation has been focused on to two radialy fed 20 kV lines, wheretwelve windmills are connected.Voltage variations have been studied by creating a model of the grid in the simulationprogram SIMPOW. The largest deviation that has been found in any point of the gridis ±1.9 % of the nominal voltage. This deviation is a result of varying powergeneration from the windmills and the voltage regulation at the connection point ofthe line.

There is convincing research which shows that the enzyme alkaline phosphatase (ALP) has a central role in the mineralization of bone, more precisely that its catalytic activity is needed in the process. ALP is found on the surface of matrix vesicles where the mineral is formed. One theory about the function of the enzyme is that it binds to fibrous collagen in the bone and thereby incorporating the mineral into the bone. The purpose of this study is to establish whether ALP binds to collagen. If this is the case, more elaborate studies around this will be performed.

This report is an outcome of a master degree project at Linköpings University in co-operation with Micronic Laser Systems AB. The purpose with this master degree project was to investigate how to implement a receiver in a data transfer system. The system consists of several data channels, where every channel consists of three parts: driver, transmission lines and receiver. The driver send low amplitude differential signals via the transmission lines to the receiver that amplifies and converts it to a single-ended signal. The receiver has to be fast and be able to feed an output signal with high voltage swing.

Bakgrund:I samband med utvärdering efter främre korsbandsoperation (acl-operation) finns det en diskrepans mellan funktionella tester och upplevd knäfunktion före uttröttning. Få studier finns där effekten av fysisk uttröttning utvärderas avseende idrottares upplevda knäfunktion. Syfte:Syftet med denna studie var att i samband med återgång till idrott 6-12 månader efter acl-operation, utvärdera om tillit till knäet, förmåga att ta i samt hopprestation skiljer sig mellan opererat ben och icke-opererat ben före och efter kortintensiv generell uttröttning. Metod:18 personer mellan 17-48 år (9 män och 9 kvinnor), vilka 6-12 månader innan testtillfället hade genomgått primär unilateral acl-rekonstruktion, deltog i studien. Vid ett och samma tillfälle genomfördes tre funktionella hopptester på respektive ben; trippelhopp, triple crossoverhopp samt sidohopp. Testerna genomfördes både före och efter kortintensiv generell uttröttning. Inför samt efter varje hopptyp och både före och efter uttröttning, skattade försökspersonerna sin tillit och förmåga att ta i genom VAS-skattning. Resultat:Hopplängd/prestation samt förmåga att ta i var sämre i det opererade än i det icke-opererade benet, utom för sidohoppet.

Syftet med detta arbete är att beskriva hur innovationsprocessen ser ut bland företag inom den gröna näringen. Vidare att ta reda på är hur idéer sprids mellan företag och organisationer samt vilka hinder som finns för att en idé skall bli en innovation..