The purpose of this degree-project was to investigate the possibilities for primary air preheating into the two smallest waste incineration boilers of Halmstad Energy and Environment. The investigation is a pre-study which has the primary goal to evaluate technical and financial offers from companies that manufacture primary air preheater, and investigate if it is technically and financially profitable to do a purchase on primary air preheaters in the future.In the pre-study it is proposed that it is most efficient to have individual primary air preheater, one for each incineration boiler and the primary air are also proposed to be preheated by hot water in the pre-study. Further in the pre-study it is proposed that the heat-exchanger should have plain tubes instead of finned tubes, to avoid getting dirty fast. The space in the boiler-room is limited, and therefore the major problem was to fit in the primary air preheaters into the boiler-room. By comparing the different offers from the companies, the result in the pre-study shows that the offer from the company C.A.

A mapping process is ongoing in Sweden concerning a phenomenon known as ?honour related violence?. The explanations of ?honour related violence? often focus on culture and ethnicity, thus establishing differences between the majority society and offenders and victims. Given that some scholars critique mapping for focusing on predetermined objects, my aim is to study discursive conditions for abused girls, who are constructed as being from within ethnic minorities, in relation to their contact with the Swedish welfare system.

The determination of the optical properties of biological tissue is an important issue in laser medicine. The optical properties define the tissue´s absorption and scattering behaviour, and can be expressed by quantities such as the albedo, the optical thickness and the anisotropy coefficient. During this project, a measurement system for the determination of the optical properties was built up. The system consists of a double integrating sphere set-up to perform the necessary reflection and transmission measurements, and a computer algorithm to calculate the optical properties from the measured data. This algorithm is called Inverse Adding Doubling method, and is based on a one-dimensional transport model.

The purpose of this degree-project was to investigate the possibilities for primary air preheating into the two smallest waste incineration boilers of Halmstad Energy and Environment. The investigation is a pre-study which has the primary goal to evaluate technical and financial offers from companies that manufacture primary air preheater, and investigate if it is technically and financially profitable to do a purchase on primary air preheaters in the future.In the pre-study it is proposed that it is most efficient to have individual primary air preheater, one for each incineration boiler and the primary air are also proposed to be preheated by hot water in the pre-study. Further in the pre-study it is proposed that the heat-exchanger should have plain tubes instead of finned tubes, to avoid getting dirty fast. The space in the boiler-room is limited, and therefore the major problem was to fit in the primary air preheaters into the boiler-room. By comparing the different offers from the companies, the result in the pre-study shows that the offer from the company C.A.

Oljeprisets påverkan på svensk och europeisk ekonomi är högaktuell ? det skapar dagligen rubriker i massmedia. Inte minst på aktiemarknaden iakttas oljepriset noggrant. Denna studie undersöker huruvida statistiska samband mellan oljepriset och olika aktieindex kan påvisas, och även huruvida dessa går att utnyttja för prognostisering. Fyra branschindex ? industri, kemi, transport och råvaror ? samt generalindex, för Sverige respektive EU, undersöks.Kointegrations- och regressionsanalys används för att undersöka sambanden mellan oljepris och aktieindex, och resultaten tillämpas sedan för prognostisering.

Syftet med denna studie är att undersöka hur etisk produktion påverkar konsumenters attityd gentemot en ökad investering vid konsumtion. Vedertagen teori menar på att etisk produktion har en positiv påverkan på den genomsnittlige konsumentens attityd och att konsumenter kan tänka sig att betala ett högre pris för produkter producerade på etiskt vis. Med syfte att konkretisera begreppet CSR och underlätta för respondenterna i enkätundersökningen används begreppet etisk produktion med hänvisning till äggkonsumtion. Aspekterna av begreppet etisk produktion som ligger till grund för denna studie är miljövänlig transport och god hönshållning. Studiens resultat redogör för att konsumenter är positivt inställda till att betala ett högre pris för produkter producerade på ett etiskt vis och att etisk produktion är ett produktattribut som påverkar konsumenternas attityd gentemot konsumtion..

This master thesis is about designing and dimensioning a boat for transport of caravan, car, trailer or ATV. Buoyancy and stability are important properties as the pontoonboat should also be able to serve as a workboat. Many of the vessels on the market today that is being used for similar purpose are stable enough, but their hull is often similar with barges and thus too slow. This work has been to construct a boat that has good stability but also has a hull that enables it to move faster, is more maneuverable and having a more attracting design than today?s barges.

När paket transporteras vintertid kommer dessa att kylas ned av den låga utomhustemperaturen. Vid ankomst till sorteringsterminalen kommer paketen ha antagit en lägre temperatur än den i terminalen. Under tiden som paketen hanteras i terminalen kommer deras temperatur att stiga på grund av den högre inomhustemperaturen. Detta medför ett ökat uppvärmningsbehov i terminalen vilket således bidrar till en ökad uppvärmningskostnad och miljöpåverkan. Syftet med detta examensarbete är att ta fram en modell som beskriver energiflödet under transport och sortering för att kunna beräkna storleken på det ökade energibehovet som uppstår i paketterminalerna vintertid då nedkylda paket hanteras. Energibehovet skall sedan sättas i samband med den extra uppvärmningskostnad och miljöpåverkan som paketen ger upphov till.

Denna studie handlar om den fartförlust och därmed den ökade energiförbrukningen som drabbar fartyg på grunt vatten. Syftet var att ta reda på hur mycket kortare en grund passage behöver vara för att den ska vara ett bättre alternativ än en lång och djup rutt med hänsyn till bränsleförbrukning och tidsåtgång. Resultatet av detta blev att det inte går att dra några generella slutsatser som gäller för alla fartygstyper men att det går att se tydliga tendenser. Studien hade även som målsättning att skapa ett underlag som skulle kunna användas av nautiker vid planering av resor, detta presenterades i form av en sammanställning av de resultat som erhållits vid beräkning av fartförlust i öppet vatten. Någon sammanställning gjordes inte för begränsat vatten eftersom exempelfartygen där fick likadana resultat vilket skulle ha gjort en sådan överflödig.

Arbetet med denna studie gick ut på att inventera vilka metoder som använts i Dannemora gruva av Dannemora Mineral AB (DMAB) gällande skuthanteringen under jord och ovan jord samt belysa och ge förslag på hur skuthanteringen skulle kunna effektiviseras och eventuellt generera en ökad mängd färdiga produkter och tillika högre intäkter för företaget.Med en mer effektiv skuthantering med fokus på separering av gråberg och malm, både under och ovan jord, hade DMAB erhållit mer färdiga produkter och därmed högre intäkter. Uppsatsens resultat motiverar att en förstudie inleds i företaget. Tillkomsten av nya arbetsmoment innebär naturligtvis en kostnad men den torde vara liten och högst försvarlig i sammanhanget men måste utredas i den rekommenderade förstudien. Det handlar också om andra besparingsaspekter som exempelvis minskade transport- och hanteringskostnader och i förlängningen även miljöbesparing, vilka dock ej är medtagna i den här studien..

This report analyzes disposable packaging and returnable packaging with the methods life cycle analysis and life cycle costs analysis. These two different packaging are analyzed through the company Clas Ohlson?s packaging-flow. To get a picture of how the flow works, a visit at the company and email contact have been done with Clas Ohlson to get relevant informationToday Clas Ohlson has a big flow of articles to the stores without larger variations in the demand, with the exception of autumn, which is when customers start shopping for Christmas. Clas Ohlson?s articles are placed on a pallet and are wrapped into plastic-film for protection and to make sure that nothing will be stolen.

Researchers, planners, and government agencies agree that road safety for children must be a priority and in particular that children should have a safe and secure way to travel to and from school regardless of age or the distance travelled. In Sweden, child traffic safety is a key part of the country?s Nollvision, a long-term traffic policy goal of ?no deaths or serious injuries?. Unfortunately, many countries have recorded increases in child traffic accidents as the percentage of parents who drive their children to school and thus congestion around schools has increased. Common strategies include traffic safety education for children, the redesign and improvement of traffic infrastructure, bicycle training, and carpooling.This thesis assesses the traffic problem around Ludvigsberg School in the district Valbo in Gävle, Sweden.

In the last few years there has been an ongoing debate concerning the methods of assessing the quality of public libraries and their services. This study investigates the opinions and needs of the users at four different public libraries in Malm : the local libraries in Bellevueg rden, Limhamn, and Kirseberg, and the main library in central Malm . The purpose was to find out whether different user groups display different patterns in their library use and, in addition, to identify what library services they prefer. The data were collected through interviews with users and librarians, and by means of a user survey ccarried out at the four libraries. The results indicate that certain differences in the usage patterns do exist between the main library and the local libraries.

The structure and performance of grocery distribution in Sweden has changed profoundly since the second world war. Increasing access and usage of the private car, in combination with an accommodating town planning has enhanced the exploitation of scale economies within distribution firms. There is, however, some ambiguity concerning the overall efficiency of the distribution system when the costs associated with travelling and purchasing performed by households are treated as an integrated part of the total distribution cost function. The purpose of this master thesis is to develop the foundation of a spatial optimisation model, which defines the most efficient distribution system. The underlying idea is that the optimal localisation and size of grocery stores is a function of economies of scale within the firms weighed against distributions costs within the households, such as transportation costs.

The purpose of this study is to highlight how a ring road and an external retail establishment may affect the city commerce. Umeå is the study object with interesting undergoing changes including a new external retail area south of the city and a new transport route that will lead the through traffic around the city.The study is based on a review of previous studies and a qualitative method. Four interviews were conducted with people who have a connection to commerce and/or municipal planning and where considered able to contribute with rich and relevant information. The result shows that the commerce in Umeå will be significantly strengthened in the context of a new external commercial establishment when the city?s overall attractiveness increases.