Regulations on the exhaust emissions of HD-diesel engines are becoming more and more stringent, and therefore, emission after-treatment systems are commonly used. These systems rely on catalytic conversion of NOx,CO , and HC emissions, and are thus dependant on temperature. At low load of the engine, exhaust temperatures are not sufficient for the after-treatment components. Therefore, means to increase the exhaust temperature while maintaining low emissions and fuel consumption are needed.The focus of this project has been to develop strategies for the lift profiles of exhaust and intake valves in the engine, with the goal to raise exhaust temperature in combination with low emissions and fuel consumption. The strategies have been tested in a single-cylinder research engine equipped with a hydraulic variable valve actuation system.

Följande uppsats handlar om 40-talister som har börjat gå i pension och deras tankar och känslor inför att gå från yrkesroll till pensionärsroll. Uppsatsen syftar till att undersöka hur 40-talisters syn på sin egen pensionering ser ut idag. Vidare syftar uppsatsen till att undersöka om och i så fall hur deras syn skiljer sig åt jämfört mot tidigare generationers upplevelser av detta. Vår frågeställning lyder: Hur upplever åtta 40-talister sin roll och identitet som blivande pensionärer? Anser de att denna skiljer sig mot föregående generation? Utifrån en kvalitativ metod har tematiserade djupintervjuer genomförts.

VoIP-system inom fo?retag blir mer vanligt. Sa?kerheten bo?r da? beaktas fo?r att undvika hot som riskerar konfidentialitet, integritet och tillga?nglighet. Denna rapport visar resultat fra?n tva? olika VoIP-systems sa?kerhet med hja?lp av praktiska penetrationstestscenarion i labbmiljo?.

In the middle of Australia there is a city called Alice Springs. The city has one of the highest amounts of daily sunshine hours and sun irradiation in the world. The Australian Government runs a project called Solar Cities, and Alice Springs is one of the participators. The main part of the goal with the Solar Cities project is to increase the amount of electricity generated by solar power and by doing that lower the impact on the environment. This thesis examines the possibilities for construction of a large scale solar power plant in Alice Springs. This is done to determine the potential of creating a more sustainable energy system in the city.

Systems development methods has always been an important part of the systems development process. It affects not only the product, but also the organization itself. Today more and more companies are abandoning the more rigid traditional methods for the more flexible agile ones. A transition like this is bound to affect the product and the organization, but in what ways? Is it a difficult transition to make, and how does it affect social environment and dynamics? Does it change how people communicate information to each other? This study was conducted at a local branch of a larger international IT-company.

Insufficient intake of vegetables is a reason for micronutrient deficiencies and malnutrition in developing countries. With urbanization, globalization and a growing world population it is of major importance to secure sufficient food supply for the world?s population. Part of the solution to increased food security among the world?s poor could be the introduction of vegetable home gardens, plots for small scale vegetable production which can provide households with sufficient vegetables as well as serve as an extra income source. The study Improving peri-urban home gardens aims at examining the existence of vegetable home gardens in the peri-urban areas of Hyderabad, India.

Deep litter is a system for animals kept in separate stalls, loafing and bedding in wind shelters. The litter can consist of different bedding, like straw and peat. The system is allowed to build over and to ensure optimal proportions it is necessary to add new straw regularly and to have good conditions. Important conditions are aerobic state, humidity, amount of organic substance and acceptable temperatures in the litter. The micro organisms are depending on temperature for their living conditions and to get the bottom layer in the litter to start burning.

This study shows how to plan a pond with an ecosystem which although it will have turtles living in it will not need to be cared. I will also demonstrate how this pond would be designed to work in the natural landscape on Mallorca. The background to the study is that I am interested to investigate how plants that we in Sweden are using as indoor plants are growing in their natural landscape and how to build a land-scape with them. The study highlights different cleaning-systems that can be used to clean a pond in a natural way. A comparison will be made between the conditions of an exterminated turtle-species which will live in this environment and a species that is easier to care for.

In Sweden, the demand for bio energy has increased in recent years due to the current energy and climate debate. In 2008, the energy supply of Sweden was 612 TWh, biofuels accounted for 123 TWh of these. Stumps have been highlighted as a potential fuel in recent years and the Swedish Forest Agency expects a technically and biologically feasible potential of 20.7 TWh annually between 2010 and 2019. The idea of utilize stumps is not new. During the 19th century stumps were used for tar production and during the 70?s and 80?s attempts were made to use stumps in the pulp industry.

Det sker nu en ovanligt stor generationsväxling på Sveriges arbetsmarknad där antalet äldre medarbetare som går i pension är fler än de som nytillträder. Detta kan komma att påverka organisationens sammanlagda kompetens då den äldre generationen ofta besitter bred, erfa-renhetsbaserad kompetens och lång organisationsspecifik kunskap. Värdefull kunskap som den yngre generationen saknar.Denna studie har undersökt hur chefer upplever att generationsväxlingen kommer att påverka deras organisation i framtiden, vilka förutsättningar som finns för att skapa god kun-skapsöverföring över generationsgränserna samt vilka förebyggande åtgärder som görs för att säkra den äldre generationens erfarenhetsbaserade kompetens inom organisationen. Studien har utförts med hjälp av en kvantitativ enkätundersökning där respondenterna fått delge sina erfarenheter genom både öppna och slutna svarsalternativ.Undersökningens resultat visar att cheferna upplever att deras organisationer kommer att påverkas av generationsväxlingen, men inte nödvändigtvis i negativ bemärkelse. Förutsätt-ningarna för att överföra kunskap över generationsgränserna är goda, men kan bli bättre.

Smallholder farmers in Uganda suffer from declining productivity. With a rapidly increasing population, marginal land is taken into production and the current land management leads to loss in soil fertility and escalation in soil erosion. There are studies indicating that the use of agroforestry increases soil organic carbon (SOC) compared to systems without trees. Soils which are high in carbon have many advantages, for example better water holding capacity, which can reduce stress on crops during drought. The aim of this study was to determine the effect agroforestry has on SOC concentration in small-holder farming systems in Uganda. The intended system to study was farms practicing agroforestry methods or not in intercropped plantain (cooking banana) fields.

Hemmasittare is a new term for children and youths with a history of long term truancy. As the term indicates these youths spend most of their time in their homes. This often results in them being socially alienated and the loss of their earlier social network. The consequences of hemmasittande and social alienation are many and include not only a deficient social network but also psychological and physical problems. Research has shown that many of these problems follow on through into adult life.

Intercropping involving trees is called agroforestry and makes it possible to get higher production for every area unit. The trees can function as food, fodder, fuel, medicine; prevent mark erosion and much more. Agroforestry can also be combined with animal husbandry. The aim of this study was to document the animal production systems used by rural small-scale farmers maintaining ruminants and using agroforestry in the northern province of Rwanda. The farmers using agroforestry is expected to have higher milk yield than average due to homegrown protein. The method used during the study was semi-structural interviews with booth open and closed questions. In order to get in contact with farmers that matched the criteria; small-scaled rural farmers with ruminants and using agroforestry, the ?Vi Agroforestry Programme? (Vi-Life) in Kigali were contacted and the staff worked as supervisors, translators and contact with the farmers throughout the study. During the study nine individual farmers, two cooperatives breeding sheep and one group interview were conducted.

Sveriges inträde i EU 1995 har lett till många förändringar i det svenska rättssystemet. Svenska domstolar har därmed fått en ny arbetssituation och nya skyldigheter. Flera förändringar har skett i svensk processrätt, och grundläggande EU-rättsliga principer som de om direkt effekt och EU-rättens företräde framför nationell rätt, har ställt de nationella domstolarna inför flera utmaningar.Den mest grundläggande skyldigheten de svenska domstolarna har gentemot EU är förpliktelsen att inhämta förhandsavgörande från EU-domstolen. Sistainstansrätterna är skyldiga att göra detta närhelst de är osäkra på tolkningen och/eller tillämpningen av en EU-rättslig bestämmelse. Detta är en långtgående förpliktelse som endast har två undantag: det första är i de fall EU-domstolen redan dömt i ett identiskt fall (acte éclairé); det andra är då den nationella domstolen anser att den EU-rättsliga bestämmelsen är tillräckligt klar och tydligt för att den självständigt ska kunna tillämpa den (acte clair).Dessa skyldigheter har lett till ett flertal problem för de svenska domstolarna.

Linux is a growing operating system in embedded systems. Today, Linux is not only in heavy servers but also in cell phones, PDAs, cameras and other devices running on battery power. While current technology is more energy efficient, more and more technologies are implemented into a single unit resulting in an overall increase of power consumption.Low power consumption is an increasingly important feature of a system today. Lower power consumption means lower costs, less environmental impact, and longer life for applications that runs on batteries.This work compiles methods to reduce power consumption of Linux systems. The work includes examining whether the available opportunities are platform-specific or of a more general nature.