Sökresultat:
1325 Uppsatser om Alternative fuels - Sida 23 av 89
Kremeringar, deponeringar och laddade ben : En granskning av gravbegreppet i bronsålderns och äldre järnålderns arkeologi
It is a well known archaeological concern that the remains of human bones left from the bronze age and early iron age Scandinavia are not nearly enough to represent the estimated population of the time. Furthermore the bones of each find rarely represent a whole individual. The majority of the bones must have been disposed of somewhere else, possibly scattered in running waters or in the fields, where they have evaporated or are securely hidden from archaeological excavations.This thesis deals with the grave concept and the problem in using a word that is so very clouded by its modern, western meaning. It also offers an alternative explanation to why the bones are handled the way they are and why they are found in such awkward contexts..
Var man slipad förr? En experimentell undersökning av sandpapprets föregångare.
In this essay I have looked more closely at different means of grinding wood prior to the mass production and total dominance of the sandpaper in recent times as there is virtually no information to be found about this. I have also done a few replicas of how early sandpapers might have looked and as a part of creating these replicas I have also tested diffrent types of early glues. The conclusion of it all is that all the alternative grinding materials tested workd virtually as well as modern sandpaper, with some reservations. And the replicas, although rough, worked mostly well despite being constructed with simplicity in mind. This indicates that an artisan could easily construct sandpapers if he so wished..
Avskogningen av Amazonas
Organic agriculture is financially promoted in Sweden by special environmental support and as consumers we are all encouraged to buy organic food. At the same time scholars at the Swedish University of Agricultural Sciences claim that organic farming does not provide any environmental benefits. The main criticism is that organic farming has lower yields than conventional, which means that more land is needed to produce the same amount of food as in conventional farming, leading to deforestation and loss of biodiversity. As for climate change, the critics claim that the significantly higher productivity in conventional crop production compared to organic, releases surplus land, which could be used for bio-fuel production and thereby replace the fossil fuels. The critics also claim that organic farming causes higher nutrient leaching than conventional.
Minskad miljöpåverkan av kapslar för kaffe, te och choklad : med avseende på materialval och utformning
During the spring semester of 2012 did Petra Hollsten independently a thesis on reducing the environmental impact of capsule for coffee, tea and chocolate. The work was performed at Karlstad University, Faculty of Technology and Science under the Bachelor of Science program in innovation, technology and design. The project's scope is at 22.5 points.The employment for this project is the company Löfbergs Lila AB in Karlstad. Supervisor at the Principal has been Maria Herou Wallner and Sandra Lyxell, product managers. Supervisor at Karlstad University is Monica Jakobsson, lecturer and program leader for innovation and design engineering program.
Småskalig vattenkraft vid Olofsfors bruksmuseum : Med faunapassage
In Sweden there are 1894 small-scale hydropower plants in operation, which together generate 4.3 TWh of electricity per year according to Swedish hydropower compound (SVKF, 2011). This corresponds to the annual consumption of about 860,000 Swedish households (based on an annual consumption of 5000 kWh). In the mid-1950s there were around 4000 small-scale hydropower plants in operation in Sweden before cheap fossil fuels and uranium competed with them, in the current situation only 1,894 of these are in use. If slumbering small hydropower plants once again would be taken into use and some new ones are built, we would be able to extract about 7 TWh of renewable electricity from these annually in Sweden, representing about 1.4 million households.The thesis intends to calculate and construct a hydroelectric power plant at the existing dam in Olofsfors and give suggestions on how the power station should run during the time that fish migration is greatest in Leduån.The turbine and generator to the station in Leduån at Olofsfors is designed by the height of the fall and the water flow through the dam. The turbine selected for the station is a CK-1000RM turbine with a 4-pole 250 kW generator from Cargo & power turbine Sweden AB, which is expected to deliver 1.2 GWh per year.
Controlled traffic for grass silage production : an economic evaluation for dairy farmers
The farm management system controlled traffic farming (CTF) aims to reduce soil compaction by restricting the field traffic from agricultural machinery to permanent traffic
lanes. Literature and empirical findings show that soil compaction and field traffic from heavy machinery may affect crop growth negatively, reducing crop yields. If grass-clover leys are subject to heavy field traffic the botanic composition might be altered, providing a lower
clover content in the forage. Clover as a silage feed is rich in protein providing good conditions for high yielding dairy cows. Grass-clover silage production is generally associated with intensive field traffic.
Vätgas och bränsleceller : Ny energi för Försvarsmakten?
The purpose of this paper is to identify the current status of fuel cell technology and to establish whether said technology is mature enough to be implemented into the Swedish Armed Forces. The question to be answered in this paper is as follows: Can hydrogen gas and fuel cells be used as an alternative source of energy within the Swedish Armed Forces?This paper is based on theoretical studies and reports from prior research done on fuel cells. By studying these facts a predictive answer has been obtained. The answer I have come to, is that the maturity of fuel cell technology is currently inadequate for the Swedish Armed Forces to implement, especially considering its harsh working conditions..
USA:s syn på Turkiet, från 1997 fram till våren 2007
The aim of this essay is to analyze the political interests of the United States Government in Turkey, from 1997 to spring 2007, using a qualitative method. I will also analyze any strategic changes during this period, by using theories of realism, particularly Structure Realism and Rational Choice. Using the Rational Actor Model (RAM), I will analyze how nation states such as the United States act in the political arena in Turkey. How can the US Government legitimize the support to Turkey and at the same time criticize there democratic deficit and their view on human rights. Turkey has been an American Military Ally, via NATO since 1952 and its demographic situation has changed since the Cold War.
Målarens musik - Harmoniska metoder för modal musik
Title: Strokes of music - Harmonic methods for modal music.The aim of this paper is to develop harmonic methods for music based on different modes or scales. It begins with an exploration of the music of Claude Debussy and then goes on with other methods and scales and also includes an analytic chapter and results at the end. With "strokes of music" I mean a musical technique, which has some parallels to how a painter can choose colors and palettes to express what he is looking for ? the freedom to choose between colors and palettes, or in music tones and scales ? to move between them by sudden or leading modulations, from the diatonic scales with alternative formations, to the symmetric spheres, to the melodic pentatonic scales and other alternative new formations, using plateauic solutions or chords in diatonic, functional and non-functional progressions. A scale can be used as tonality or subordinated and the harmonic rhythm can be both with no movement and fast paced.Syftet med detta dokument är att utveckla harmoniska metoder för musik som bygger på olika modus eller skalor.
Logistik för stråbränsle :
Summary
Today energy prices are rising. As a result biomass fuel is getting more and more
interesting. Wood chips is very popular, but also straw from grain production is on the
table. Lunds Energi AB project a combined power and heating plant in Örtofta out of
Lund. Wood chips is meant to be the main energy source, complemented by straw.
In this thesis the transportation of straw for fuel is studied.
Evaluation of creditability and risk minimisation : The effect of accounting for intangibles
The recent history knows numerous examples of creditor?s inability to evaluate financial solvency of the client correctly. Creditors? risks do not only concern individual relations between the two parties but the economy in general. The standard loan-giving procedure considers evaluation based on a number of financial ratios.
Picea mariana ((P. Mill.) B.P.S), P. abies (L.), Pinus contorta (Dougl.) och P. sylvestris (L.) : en jämförelse av produktion och potentiell kvalitet hos försöksbestånd i Jämtlands län
Swedish forests are dominated by just two conifer species Norway spruce and Scotch pine. They are not able to achieve the highest possible production or fulfill industry demands for raw materials. The introduction of exotic conifers can potentially meet these shortcomings and present a relevant solution.
This study was conducted in a block experiment with ten blocks planted in 1987 by SCA in North Sweden. The objective of the block experiment was to study if Black spruce is an appropriate alternative to Lodgepole pine, Norway spruce and Scotch pine on different site classes.
En jämförelse av RDF och avfall som förbränningsbränsle
In the EU the amount of waste increased by 14 percent during the years 2000 to 2010. EU?s target to reduce waste generation runs parallel with the aim of increasing the efficiency and profitability aligned with energy recovery. In Sweden the energy recovery through incineration is increasing steadily, and 46 percent of the municipal solid waste (MSW) is treated by combustion. This report aims to examine the profitability of processing MSW into Refuse Derived Fuel (RDF) from an economic-, energy- and environmental perspective.
Leka lära leva : En studie i inomhusmiljöns betydelse för små barns lek och lärande i förskolan
Our aim in this work has been to redesign ModernFamilies and make a user-friendly interface for people with aphasia. The focus has been to identify general issues they might face while using different technology and applications, in order to find better alternative design for ModernFamilies, with a focus on usability. To approach this issue, we used a qualitative method. Our study includes several interviews and observations preformed in conjunction with the AGNES project (AGeing in a NEtworked Society) and speech therapists. Aphasia requires simple design that in the same time gives them support to understand and use technology and different applications.
När gamla lagar och nya teknologier möts : En diskussion om den illegala nedladdningen av musik idag
Research shows that almost 30 per cent men and 20 per cent women at the age of 16-24 in Sweden download music on a regular basis instead of buying records. Thanks to modern technologies teenagers of today have become used to downloading music illegally from theInternet. Even though legal alternatives, such as Spotify, have become popular, the behavior of illegal download of music still persists. What do record companies do to prevent this phenomenon and why do they go to such length to stop this widespread movement? The question is, why is illegal download of music a problem ? and for whom? To investigate this I?ve read books about the subject, analyzed web pages of alternative record companies and interviewed a drummer in a local band.