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993 Uppsatser om Forest fuels - Sida 53 av 67

Omkonstruktion av armled tillhörande Bracke Forest högläggare

One of the main tasks of the Swedish Armed Forces over the past few years has been International assignments, which increased the importance of the Lessons Learned process. Methods of simulator training with computers have become more frequent and the technical ability to collect digital data from sensors has been developed as well. This work demonstrates how the experience of Lessons Learned can be communicated with the computer simulator StriSimPC and how modern technology in future support experiences from the Lessons Learned process at the tactical level in the Army.Currently knowledge sharing consists of several processes and strategies in the Swedish Armed Forces. This is done by written reports, oral presentations and different practical exercises.This case study shows the functions of the simulator StriSimPC, methods of training and how it is used today. The study also describes the future opportunities, where digital metadata acquired from the modern combat vehicles could contribute sharing of experience in the Lessons Learned process.The summarized conclusions indicate that StriSimPC can combine the two strategies for personalization and codification of knowledge transfer to reach a higher level of learning.

Pre-treatment of grain for ethanol production during storage

Ethanol for automotive purposes is an issue much debated and researchers disagree about the benefits of bioethanol. Converting energy-rich crops into ethanol suitable as motor fuel is a complex process and continuous development and improvements of processes and material used are important steps in the work of developing environmental friendly fuels. Grain is usually preserved by drying which consumes a lot of energy. Alternative storage of high-moisture grain in airtight storage systems reduce the energy required to produce bioethanol and studies have also shown that ethanol yields are increased more than 10% in ethanol fermentations of moist grain compared to dry. Airtight storage is often not perfectly airtight so biocontrol agents are necessary in order to preserve the grain.

Entreprenörernas åsikter om Sydveds samarbetsförmåga :

This report is the result of a questionnaire survey done in cooperation with the company Sydved and their contractors. The investigation concerned all their ordinary contractors. The main goal with the study was to find out the contractors opinion about the current cooperation conditions with Sydved, their opinion about the future and how to improve the cooperation. All contractors got a questionnaire to fill in and return within a given date. The percentage of answers was 48 % at the first stage and further 11 % answered after reminder. The result of the investigation indicated that the contractors in general have a positive attitude to Sydved and the way that the company acts.

Studie av Karlskogas fjärrvärmenät för att sänka returtemperaturen

A district heating plant has the advantage that it can take advantage of the waste heat from industries and use of cheap fuels to produce heat. But for the long term is competitive requires that energy is also saved in district heating plants. One way to save energy in a district heating system is to increasing cooling to the return temperature. This leads to less power needed to drive the distribution pumps,  and that more energy could be extracted from the same amount of fuel by an improved flue gas condensation.In Karlskoga the return temperature into the district heating plant is high. They would therefore reduce the return temperature in order to extract more energy from the flue gases.

Funktionaliteten i skogsmaskiners GIS-system

Holmen Skog is currently using a GPS-program called TraktInfo, originally developed within the company. They are now planning to switch to a new GPSprogram or allowing the contractors to buy other programs available from the logging equipment manufacturers. To be able to offer this flexibility, Holmen Skog needs to obtain information about the features offered by the different manufacturers in their specific programs, and also when the manufacturers are planning to start selling programs adapted to the new standard called StanFord2010. According to the study, the manufacturers are hesitant to StanFord2010 and there has also been a lack of clear signals from the customers and clients about what kind of different new features to include in the programs. The feature most frequently used by forest machine operators today is the option to keep record of the harvester?s path by creating a ?log plot?. This feature was not used to its full potential however, since only one out of eight of the forwarders included in the study had computers that were compatible with the harvester?s computer.

"Den kemiska bekämpningen av skadlig lövskog har öppnat helt nya vyer för skogsbruket" : flygbesprutning med herbicider i Arjeplog 1953-1978

Attityden gentemot lövträd och lövskog i norra Sverige började förändras i mitten av 1900-talet. Tidigare var lövträden en resurs inom det agrara samhället, men genom det industriella skogsbrukets utveckling började man alltmer betrakta lövträden som ett problem. Lövträden gav sämre lönsamhet på grund av att de inte efterfrågades inom industrin och lövträden ansågs även hota barrträden och deras föryngring genom sin förmåga att föröka sig vegetativt genom stubbskott och rotskott. Det fick till följd att det inom skogsbruket talades om ett ?lövproblem?.

Tabloidisering i kristid : En jämförande kvantitativ fallstudie av Vestmanlands Läns Tidning och Aftonbladets rapportering under den stora skogsbranden i Västmanland sommaren 2014

This essay concerns the possible tabloidization of Swedish daily newspapers. To investigate if tabloidization theory could be supported, a case-study is made using the isolated crisis of an especially big forest-fire in the county of Västmanland in Sweden in the summer of 2014. One local paper of the daily press, Vestmanlands Läns Tidning and one tabloid-paper with a national spread, Aftonbladet, are compared using quantitative content analysis to see whether there are similarities or differences enough to support or reject that the daily press is under influence of tabloidization. The results of the two papers news coverage of the fire are compared in three main categories; Theme, Source and Value-words. These categories represent three of tabloidization?s main criteria; ?soft news?, personification of sources and more use of words that connote strong values as signs of a lower quality in journalism.

Lägersmål och lönskalägen i Bergslagen 1771-1830

Barnamordsplakatet (a Infanticide Proclamation) of 1778 was a circular allowing unmarried mothers to give birth at an undisclosed location without giving up the name of the father. The proclamation was supposed to ease the situation for the unwed mother in Sweden.The aim was to investigate whether women in Assembly of Hällefors, far from government and close to remote forest Finnskogen, was affected by the Infanticide Proclamation, between 1771 and 1830.Case studies has been done on people who had illegitimate children, if they were convicted, what the crime was and what the punishment was. The investigation is made at a local level and compared against national analyzes on the same theme.A lot of illegitimate children were born in Grythyttan nearby and slightly less in Hällefors, compared to other places of Sweden. Mothers and fathers were convicted in the district court for crimes, including, sexual intercourse between unmarried persons. More women than men were convicted.

Kejsarsnitt på nötkreatur : indikation, frekvens och utförande

The background of this study is an article in the hunting magazine ?Svensk Jakt? where Karl Hedin claims that his sawmills has not noticed any significant moose damages in the timber. The purpose with the study is to find out the causes to the moose explosion and what it has led to in today?s forests. A questionnaire has been sent out to sawmills in the region Dalarna with the purpose of finding out if sawmills receive moose-damaged timber and what they think about how they foresee future development. There were two causes of the moose explosion, that had effects on the moose population. The first cause was that the moose hunters wanted to raise the moose population, and by raising the calf shooting and by saving the cows they succeeded. The second cause was changing methods in Swedish forestry.

Besökstudie av I2-skogen i Karlstad : Betydelsen av tätortsnära skog för samhället

Karlstad kommun vill att Karlstad ska uppnå 100 000 invånare, mot idag dryga 80 000. För att nå dit måste tätortsnära skogar exploateras. För att få reda på hur välbesökta de tätortsnära skogarna är i Karlstad, genomfördes i november 2005, februari, maj och augusti-september 2006 en kvantitativ besöksstudie av I2-skogen i nordvästra Karlstad. I2-skogen är ett tätortsnära område omgärdat av bostäder åt tre håll. I området finns bland annat flera motionsspår, golfbana och skjutbanor.

Besökstudie av I2-skogen i Karlstad : Betydelsen av tätortsnära skog för samhället

Karlstad kommun vill att Karlstad ska uppnå 100 000 invånare, mot idag dryga 80 000. För att nå dit måste tätortsnära skogar exploateras. För att få reda på hur välbesökta de tätortsnära skogarna är i Karlstad, genomfördes i november 2005, februari, maj och augusti-september 2006 en kvantitativ besöksstudie av I2-skogen i nordvästra Karlstad. I2-skogen är ett tätortsnära område omgärdat av bostäder åt tre håll. I området finns bland annat flera motionsspår, golfbana och skjutbanor.

Metrias vegetationsdatabas i skogsbruket : en GIS-studie

Metria håller på att ta fram en vegetationsdatabas över Värmlands län; det finns flera intressenter bakom framtagandet av databasen. Utöver dessa är StoraEnso en eventuellt tillkommande intresent, som undrar över praktiska användningsområden med databasen. De är även intresserade av att veta hur databasen överensstämmer med egna befintliga databaser. I detta arbete har jag samkört Metrias vegetationdatabas med StoraEnsos databaser för att få en bild av hur de överensstämmer och hur ett eventuellt praktiskt användande skulle kunna fungera. Tre olika försök har gjorts: ett användarförsök och två samstämmighetsförsök.

Vermicompost for reduction of vegetable waste - and a possible means to produce fish feed in aquaponic systems?

Aquaponics is a food production system consisting of a consecutive cultivation of plants and aquatic animals, fish or shellfish, in recirculating water. The plants feed on the nutritious effluents from the fish tank and bacteria converts ammonia from the fish tank into nitrate that is absorbed by the plants. The plants receive nutrition and the fish gain purified water. The environmental impact of the production of fish meal and fish oil used in conventional fish feed includes a large consumption of fossil fuels with subsequent carbon dioxide emission. The aquaponic system can be made environmentally sustainable and self-supporting if supplemented with a vermicompost/vermiculture for the production of worm protein as a fish feed. Vegetable waste from the hydroponic part of the system can be reused as worm feed in the compost and the protein rich worms can be harvested, dried and grinded and brought back to the aquaculture as fish feed. As a first step in this direction, I have investigated the effect of recycling of vegetable waste in vermicomposts on the growth and number of earthworms (this was evaluated after harvesting). The hypotheses were that earthworms can be cultivated in the vegetable waste and that by adding manure to the vermicompost it is possible to obtain a nutrient content adequate to support a continuous worm harvest, in other words create a vermiculture. Eisenia fetida and Dendrobaena veneta were grown in 20 L bins containing peat mixed with either poultry or cattle manure. The proportions were 70% peat and 30 % manure. Discarded plant parts from lettuce cultivation was added to the vermicomposts (35 g per week) and water was supplied with 0.8 L per week.

Skogsskötselns påverkan på fodertillgång för klövvilt : The impact of forest management on forage availability for ungulates

Det pågår en ständig debatt mellan olika parter i samhället angående betesskador orsakade av klövvilt. Huvudmålet med dagens viltförvaltning är att anpassa klövviltstammarna efter fodertillgången i landskapet. Syftet med studien var därför att kvantifiera fodermängden för klövvilt i skogslandskapet, undersöka hur olika skötselåtgärder påverkar foderutbudet och analysera kostaderna för dessa. Studien begränsades till ett sammanhängande område i Holmen Skogs distrikt Egen skog. Med hjälp av beslutsstödsprogrammet Heureka PlanVis har foderutfallet för ett antal olika foderskapande skötselåtgärder tagits fram. I de flesta simuleringar var målet att maximera nuvärdet, men det alternativ som skapade absolut mest foder var när målet istället sattes till att maximera biomassan i skogslandskapet.

Död ved i vatten - funktionella strukturer och dess påverkan på öring (Salmo trutta, L.)

The background to this work was to see if there was a connection between large woody debris (LWD) and the presence of brown trout in our Swedish forest streams. Previous researches by Degerman et al. (2004) have shown that there is a strong correlation between the amount of dead wood and the presence of brown trout. The goal was then to find a way to restore, maintain and increase the trout habitats by constructing and adding manmade wooden structures that would mimic natural deadwood and its features in flowing water. The inspiration was partially taken from a water restoration program in the Klamath River of northern California, USA.

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