The aim of this study was to quantify the productivity and the costs of different harvesting systems (teams), containing harvesters equipped with accumulating harvester heads and forwarders, in first commercial thinnings were an integrated harvest of pulpwood and energy wood were performed. In the beginning the plan was to study and measure 20 sites before and after harvest. Due to storms during the summer of 2010, complete data could only be obtained from 8 of these 20 sites. Seven of these sites were privately owned and one was owned by UPM, all of the sites had been pre-commercially thinned. The mean stem density before harvest was 2578 stems per ha and the mean stem volume was 0.074 m3solid over bark.On average 1518 stems/ha was harvested.

AbstractThe dependency of fossil fuels in the transport sector causes large emissions of carbondioxide. This problem can we reduce by using vehicle gas from digested solid manure and leftover of pasture. I have studied the potential for this in the county of Västernorrland. Thepurpose is to investigate how much vehicle gas that can be extracted.One central, large scale digestion and upgrade plant should be placed in Härnösand. Theamount of pasture and manure that is economical and practical available is enough to produce2,7-3,5 millions Nm3 vehicle gas.

A growing interest for the climate and the environment has led to an increased interest forenvironmentally friendly and renewable energy sources, such as biogas. Planning new biogasplants requires a decision basis including facts about approximate amounts of biogas possibleto produce at the plant. The purpose of this thesis is to develop a model that calculates theapproximate biogas and digestate production from a planned or existing biogas plant.Developing the model required a literature review and studies of calculations concerningbiogas and digestate production performed by WSP Sweden AB. As a complement to themodel development, facts about substrates for biogas production were compiled through aliterature review. In addition the methane potential from selected materials was determined bybatch experiments.

Today many companies and municipalities requires that their suppliers should have an environmental management system to work by. This might be one of the reasons to the increasing number of companies that today are implementing environmental management systems. Care of Haus is one of the companies that thinks that the benefits are bigger than the disadvantages, when it comes to environmental management systems, therefore they have made the choice to work with ISO 14001.The ISO 14001 standard is deified on the PDCA- cycle. PDCA stands for Plan, do check and act. Care of Haus choose to work with the ISO 14001 standard since it is a well-known standard for the companies that?s Care of Haus collaborates with and it is also well-known within their clienteleWithin this report an environmental investigation has been made.

The cocoa produced in Fiji is exported to industrialized countries for processing of the raw material. The Swedish organization Cocoa Bello is involved in a project to provide the Fijian cocoa farmers with knowledge as well as resources to enable local processing and to attain added value of the cocoa crop. The purpose of this study is to discover a field of application for the Fijian cocoa among the rural population, using an ethnographic design. We spent one week in Namau Settlement, Fiji, where we applied in-depth interviews and participant obser-vations in six families. We found a number of aspects affecting food choices, such as social, economical and cultural beliefs.

Wastewater handling of private sewage systems has become an all increasing matter. In Stockholm region the 90 000 private sewage systems contribute with larger phosphorus flows to the Baltic Sea than the two biggest sewage plants in the area, Henriksdal and Käppala, contribute together, even though these two plants purify wastewater from more than one million inhabitants. When summer house areas turn into areas for permanent living ? transition areas ? the load on the existing systems increases, systems that already often are unsatisfying. In those areas it is not clear what the best system choice is; On-site systems for single households; Local collective systems or Connection to central systems.

The aim of the thesis is to examine how central collective actors in the Swedish subsystem of renewable fuels use their positions of power and influence to their own specific interests and needs. In particular the thesis looks at the problems of climate change and oil scarcity and how renewable fuels are described as a potential solution. Using agenda setting theory and Steven Lukes three dimensions of power as a framework, five actors are examined and analysed. The study has been done in two parts. In the first part policy documents are analysed concerning the actors general stance towards renewable fuels, and how this is communicated to the media, politicians and public.

The primary function of a mixer is to keep a fluid in constant motion. All mixing applicationsrequire varying degrees of small-scale turbulence and bulk flow. The performance of asubmersible mixer is measured by the thrust that it produces, while the strength of the bulkflow is dependent on the total amount of installed thrust.In a mixer, the fluid quickly flows past the propeller, and as a result, the current is mainlyaxial. The fluid will also obtain a rotating velocity, or a swirl, though this is significantly lessthan that of the propeller. During the process, the total amount of energy increases in the formof static pressure and kinetic energy.

Vårt syfte med studien är att undersöka hur pedagoger arbetar med barnens motoriska utveckling i inomhusmiljön. Vi använder oss av kvalitativa intervjuer med pedagoger i förskolan och skolans förskoleklass till år tre. Det vi är intresserade av är pedagogernas tankar kring användandet av sin inomhusmiljö med avseende på den motoriska utvecklingen hos barnen samt för att se eventuella skillnader mellan verksamhetsfälten. Våra intervjufrågor behandlar fyra huvudområden, användandet av inomhusmiljön, vilka aktiviteter som genomförs, förhållandet till läroplanerna och motorikens betydelse. Resultatet visar att pedagogernas arbetssätt i förskolan och skolan skiljer sig en del inom dessa ämnesområden.

Energy losses are an essential part of a power grid company?s costs. From anenvironmental and economic perspective, it is important to reduce these costs. Toknow where efforts should be deployed, it is important to have good knowledge ofwhere in the network losses are situated. When creating network tariffs, there is alsonecessary to have a correct distribution such that the network customers that use acertain part of the network, only pays for the network losses in this area.

Syftet med denna rapport är att undersöka om det går att integrera en inomhusantenn i ett textilt material. Rapporten utgår från en design breif från företaget Teracom Group som är en del av kampanjen ?The Optimal Indoor Antenna?. Problemet som uppstått är att Boxer Danmark anser att den danska populationen inte tycker att de befintliga inomhusantennerna är tillräckligt estetiskt tilltalande. Detta problem har det forskats kring genom litteraturstudier, empiriska studier, material- och designstudier samt produktutveckling.

Osteoporos eller benskörhet, är en folksjukdom som vanligen inträffar i samband med åldrandet. För att kunna diagnostisera, upptäcka och följa frakturrisk i god tid är det bra om en bentäthetsmätning görs. Bentäthetsmätning eller bendensitometri utnyttjar metoden Dual energy x-ray absorptiometry (DXA). För att kunna bedöma metodens reproducerbarhet rekommenderas att periodvis genomföra en kvalitetssäkring vid bentäthetsmätning, eftersom det är en kvantitativ mätning. Syftet med studien var att kvalitetssäkra metoden för bentäthetsmätning.

The first commercially produced wind turbines in Sweden are starting to reach theend of their lifetime after approximately 25 years of producing energy. The cost fordismantling the turbines, according to Ardefors et al. (2009), is calculated to be 1-2 %of the total investment of the wind turbines. The purpose of this master thesis is tomap the dismantling process of wind turbines in Sweden and try to find a sustainablesolution for the future.To make sure that a correct dismantling process takes place, and that the financialaspect is covered, a proposal for a financial guarantee is worked upon. A nationalunanimity will be created through a financial guarantee and the risk will be minimalof a third party getting afflicted.Studies of literature and interviews have been carried out.

AbstractThis thesis is the final part of the Innovation and Design Engineering Programme (180 ECTS credits)at the Faculty of Health, Nature and Engineering Science at Karlstad University. The extent of thisthesis is 22.5 ECTS credits and has been performed independently by Hannes Jernberg during thespring of 2013. Metso Paper Karlstad AB is the task maker of this project, and Arvid Johansson is thecompany Representative. Metso Paper Karlstad AB is one of the world leading developer andmanufacturer of tissue paper machines.In the current situation, the company has developed and patented a power management systembased on a Cross Flow Turbine. The current construction is limited to a paper width of 2.9 meters.The company wants to take advantage of all the opportunities provided by the patents, to develop aturbine solution paper machine with a paper width that is wider than 5.5 meters, and give the abilityto manufacture paper for lower energy consumption which is an important part of the production asit is very energy intensive.Problems arise with the increasing length of the turbine, ultimately resulting in that the deflectionbecomes too big and that the momentums, due to the increased torque the turbine blades breaks.By applying the design process, this work has resulted in a number of potential solutions to theproblem.

Agricultural drainage is widely used to manage the amount of water in the ground in order to improve conditions for cultivation. However the effects of drainage companies on water regimes are considerable leading to runoff changes such as altered stream flows, peak flows and water levels. In a greater extent this could imply an increased risk for floods along affected watercourses. This study analyzes the extension of agricultural drainage within the drainage basin of Trosaån in Sweden by ArcGIS mapping. In a statistical analysis, historical variation in streamflow in relation to mean precipitation and mean temperature are investigated for the study area.