SammanfattningDet finns tre anledningar till att uppsatsen kom att handla om biogas. Göteborg Energi AB som vi samarbetat med under vårt examensår, hade ett behov av att kartlägga hur effektiva deras biogasanläggningar var. Samt vårt intresse för biogas som bygger på ett stort engagemang kring förnybarenergi, och att branschen spås en lika expansiv utveckling som vindkraften haft det senaste decenniet.Syftet med uppsatsen är att defininera och utveckla relevanta nyckeltal. Vi kommer sedan att samla in data från utvalda biogasanläggningar, för att sedan sammanställa och analysera denna. Frågan vi vill besvara är hur de olika biogasanläggningarna och produktionsmetoderna skiljer sig åt beträffande hur effektiva de är ur energi- och kostnadssynpunkt samt ur ett lönsamhetsperspektiv?För att besvara forskningsfrågan har vi skapat en modell där relationen mellan de olika nyckeltalen illustreras och förklaras, för att skapa förståelse för sambandet mellan intäktsdrivande och kostnadsdrivande produktionsfaktorer.

Humanity has always dreamed about a better world. These dreams has manifested themselves in the vision of Utopia - the good place, but also the non-existing place. Up until World War II man still wrote optimistic descriptions of this ideal world, and spread the idea through literature. In the aftermath of the atomic bomb and under the influence of the cold war, these publications seized to surface in literary surroundings. Despite this utopia did not die - it has only changed.

Vattenfall Heat AB is a district heat provider in Drefviken, but has yet to establish any cooling systems in this area. This thesis examines the potential client base within the area today and over the coming 20 years. The feasibility of the most common cooling technologies is evaluated and results show a total potential for an installed capacity of 30 MW providing 50 GWh of cooling per year. One of the examined areas shows good prospect for heat driven absorption chillers during the summer months when the heat load is limited..

This report is the written documentation of a project work carried out at the Division of Engineering Materials at Luleå University of Technology in cooperation with Seco Tools AB. The project deals with the analysis of residual stresses in Ti-Al-N thin film grown on WC/Co cutting inserts. The composition of Al varied from 0% up to 75%. Increasing the Al content in the Ti(1-x)Alx N compound improves the compressive residual stresses even after annealing of the material. The experiments have been performed in a high temperature x-ray diffractometer (HTXRD) where the interplanar atomic spacing was determined in-situ and subsequent converted into stresses.

Intestinal lymfangiektasi (IL) är en ovanlig gastrointestinal sjukdom som karaktäriseras av patologisk dilatation av tarmens lymfkärl. Sjukdomen drabbar både hundar och människor men behandlingen divergerar inom human- respektive veterinärmedicinen. Etiologin är ännu inte fullständigt belyst. Sannolikt finns ärftliga komponenter och gener essentiella för lymfangiogenes har isolerats. Patogenesen är relativt väl undersökt och behandlingen syftar till att reducera förlusten av plasmaproteiner.

Förståelse för hur vätska penetrerar in i kartong är mycket viktig vid bestrykning och tryckning. Det finns flera olika tekniker att mäta vattenabsorptionen i kartong, men vilken information som varje instrument ger eller hur de olika resultaten korrelerar med varandra är inte helt utrett. Syftet med detta examensarbete har varit att besvara följande frågor: - Vilken information erhålls med de olika teknikerna? - Hur korrelerar de olika instrumenten med varandra? - Hur förändras de olika kartongerna med olika ytlim? - Hur påverkar omrullning kartongen? Ytråhetsmätningar visar att kartongen får lägre topografi efter omrullning. Omrullningen förändrar motsidan mera i ojämnheter som ligger tätt medan trycksidan förändras mera i ojämnheter med längre avstånd.

ABSTRACTMany wind turbines have problems with icing and there is still no effective method to de-ice without stoppage of production and power loss. Here I therefore consider other methods than those available today, and particularly, I consider how these methods could be applied to wind turbines of the company Oxel. A surface where the water droplets do not attach might be the basis for a useful method. If no water attaches, no ice could form. To accomplish this a hydrophobic surface is nessesary, for example wax.

Detta examensarbete handlar om mag-tarmkanalen och är uppdelat i två avsnitt. Den första delen handlar om mag-tarmkanalens uppbyggnad, rent anatomiskt men också hur den ser ut histologiskt. Histologin är bara ytligt behandlad då den endast är med som förklaring till vissa händelser inom fysiologin. Den andra delen, fysiologidelen handlar om de olika delarna i mag-tarmkanalen, deras funktioner och vad som reglerar dessa. I fysiologiavsnittet behandlas också nedbrytning och absorption av de olika näringsämnena..

North Korea has been on people?s minds lately. This essay is a study of what image Swedish press gave of North Korea starting in 1948 and ending in 2011. The study looks at two of the largest newspapers in Sweden, Aftonbladet and Dagens Nyheter.  During the 1950´s the image given was that North Korea was part of the communists, a puppet state of the Soviet Union.

Background: Pressure ulcers are a common problem and cause great suffering for those who develop it, and are also an expensive cost to the society. Aim: To describe nursing measures for prevention of pressure ulcers among elderly people in ordinary and nursing homes. Method: A literature review by structured analyze of scientific articles. Result: The analyze resulted in six subjects for prevention of pressure ulcers. These subjects were; risk assesment, nutrition, repositioning, skin/hygiene, nurse knowledge and documentation.

Sweden's drinking water quality is considered to be high partly due to a high quality of the raw water and a well developed sewage infrastructure. Despite this, there is water contamination that could be prevented by installation of a sophisticated early warning system. Some of the major players in the production of drinking water have already invested in different types of early warning systems to ensure drinking water of high quality. There are various forms of early warning systems where automatic monitoring of E. Coli is an interesting alternative.

The purpose of this study was to examine vitamin A and E in equine nutrition and especially in relation to forages. A literature review was conducted to examine factors that influence the level of vitamins present in forage, the vitamin A and E requirement of horses, and the absorption of vitamin A and E in horses. The influence of DM level on alpha-tocopherol and beta-carotene content in ensiled forage was investigated in a controlled ensiling study using baled silage and haylage. The results from the ensiling study were combined with data of vitamin A and E concentrations collected from literature. Calculations were done to theoretically establish how well the vitamin content in ensiled forage can cover the maintenance requirements of vitamin A and E in horses.

Shelters and Nuclear weaponsA discourse analysis of the Swedish defense and civil defense debate during the Cold warSweden during the Cold War set into motion one of the world?slargest civil defense policies at the time, second only to neutral Switzerland. The governments expenditure was far greater per capita than both that of USA and Soviet Union and included massive evacuation plans for Stockholm and other large cities in Sweden, with the hopeful expectation to bring down the amount of people in each of them to 15000 in case of a foreign hostile nuclear attack. The policies included construction of shelters with room for 2,5 million of about 7 million citizens in total at the time along with gasmasks for the whole population. Not only this, Sweden was considered one of the biggest military powers of that time in relation to its size and population.

In many developing countries, among them Vietnam, contamination of agricultural land is a major issue that has public health implications. A fast growing population, rapid urbanization and industrialization have led to air and water emissions of potentially toxic elements (PTEs), such as cadmium (Cd). Earlier studies have shown that individuals with low iron (Fe) and zinc (Zn) status absorb larger quantities of Cd than those of adequate nutritional status. The purpose of this study was to investigate and compare the Fe and Zn intake from the foods consumed by women (15-45 years) in selected households in two agricultural villag-es in the Red River delta in Vietnam. In one of the villages the residents were involved in metal (mainly Fe) recycling activity, whereas in the other village the residents had agricul-tural production as main source of income. Interviews, followed by food intake calcula-tions, were performed.

Studies show that activity based costing (ABC) is not widespread in practice even though it has been present in the academic world since the 80's. This thesis examines the reasons for the discrepancy between theory and practice through a case study of a Swedish manufacturing company. The intension is to answer the question of what contributes to the choice of precision in product costing.We found arguments for increasing precision in product costing but not to the extent of a full-scale ABC implementation. The company's estimation of the value of increased precision. In the study three company unique factors were isolated that affected the company's estimation of value; drifting purpose of product costing, historical use of product costing and knowledge about product costing..