Sökresultat:
957 Uppsatser om Thermal heat losses - Sida 40 av 64
Ryssen Kommer : Synen på det ryska hotet i svensk landsortspress, från 1858 - 1898.
With this essay, I want to examine the image of Russians in the Swedish rural press during the second half of the 19th century, how rusophobia appeared in Swedish rural press and how the image of Russians changed during this time. To find this out, I set these questions: ? How was Russians and Russia portrayed in the Swedish rural press? ? Did the view of Russians change during this time?The essay is written so that I have interpreted my empirical material to do a discourse analysis in which I analyse different articles that have been written about Russia and Russians in a stereotypical way. The source material used in the thesis comes from 41 news articles; the bulk of the source material comes from newspapers that were published during the late 19th century.Rural press reporting on Russia and Russians were in the second half of the 19th century mostly negative. Of the 41 articles that were examined it was found that about half were negative, less than one-sixth were positive, while about a third were neutral.The reason that many of the articles were negative has to do with Sweden's shared history with Russia, with many wars and territorial losses.
Energieffektivisering av bostäder : En analys av åtgärder som kan förbättra energiprestandan i flerbostadshus
Efficient energy use in the housing sector is crucial for achieving a sustainable society. The expansion of this sector only represents a fraction of the existing houses, hence it?s within the existing houses the potential for energy savings lie. This potential has been analyzed in order to determine if it?s possible to cut the current energy demand in half.
Faktorer som påverkar vindkraftsutbyggnaden
Wind power is expanding rapidly in Sweden. Increasing amounts of wind power sets higher requirements on balancing power and grid expansions and would affect the whole Swedish electricity system. The aim of this report is to examine the factors affecting the wind power expansion in Sweden. How many wind power plants projects will obtain building permissions and what costs and revenues can be expected? How much balancing power will be required and does a changing geographical distribution of the wind power plants reduce the need of balancing power?A survey of the county board?s official applications has been made and out of all the applications, corresponding to 80 TWh produced per year, about half of the applications are expected to obtain a permit with a major portion of them located in the north of Sweden.Especially older wind power plants, deriving revenue from Nord pool, find themselves today in a complicated financial situation.
Isolerande och skyddande dubbelväv - Produktutveckling av ett kylande fodral
Denna rapport beskriver en produktutvecklingsprocess som behandlar utvecklandet av ett textilt material som isolerar och skyddar. Det textila materialet ska fungera till ett kylande fodral utan att förstöra dess funktion och behöver därför uppfylla en speciell kravspecifikation. Materialet ska isolera mot kroppsvärme, vara stabilt, skyddande och slitstarkt. Dubbelväv valdes tidigt i arbetet då det är ett enkelt sätt att kunna påverka det textila materialets egenskaper i form av material- och konstruktionsval, i en betydligt större utsträckning än i en enkelsidig väv. För att utveckla ett material med de efterfrågade egenskaperna har tester utförs och den metod som har använts är hypotesprövning.
Detaljhänsyn efter slutavverkning : kvantitet och inverkan på framtida produktion hos SCA i Västerbotten
According to FSC (Forest Stewardship Council) shall at least a mean of 10 trees per hectare including riparian zones and other areas with high biological values be left in final felling. In addition large clear areas should not be created and all retained trees with high environmental value shall be spared. To leave trees in final felling means a lower cutting volume and hence a lower income from the cutting, but it also means that the production in the next generation becomes less because of competition. The aim of this study was to evaluate the effect retained trees have on the production in the new generation of forest, and to investigate if there is any way to lower this effect. The environmental care has also been estimated by the amount left in final felling.
Avel för hållbarhet och livslängd hos köttdjur
The purpose of this literature study was to investigate the possibilities to improve longevity and stayability of beef cattle with breeding. The breeding goal for beef breeds is to produce animals with high capacity for growth and good feed efficiency. Longevity and sustainability are two important features to include in the breeding goal. If longevity is increased each cow can produce more calves and the number of female calves used for recruitment can be reduced and only the best heifers need to be selected for breeding. The benefits of longer life is that it lowers the costs of recruitment animals, it increases the number of young animals that become available for slaughter, and it increases the proportion of high producing animals in the herds.
Automatisk tändning till modern vedpanna
If you have access to wood, a wood burning boiler is a cheap way to heat your home, but it is certainly not the most convenient option. Wood requires many operations and management, which takes time. One way to reduce this workload is to have a modern boiler with automatic ignition. Enertech/CTC has a desire to create an accessory with automatic ignition to a modern wood burning boiler. Today there is no boiler on the market that can ignite firewood automatically without the introduction of paper and sticks.
Energianvändning i badhus : Simulering och jämförelse av gamla och nya system
Every year new premises are built in Sweden, and even if they are made as energy efficient as possible, this will not reduce the energy demands, but the rate of the increase of the energy use will be reduced. One type of facility in Sweden that is a major energy user is public baths, and this makes public baths an interesting facility to study more closely. There are around 500 public baths in Sweden and about 75 % of those can be seen as older baths with large need of renovation, and they all require a high level of energy efficiency measures. To show how the energy demand increase or decrease depending on the changes chosen to be made, the simulation application IDA Indoor Climate and Energy was used. Simulations were made and compared for several cases, with two extreme cases as starting points.
Termisk Vattenpump
This degree project aims at developing a concept for how to use solar energy to pump up water. The target audience is people living in areas where the functioning of the electricity and water network is absent. In these areas, the hand-powered water pump is the most common technology. The degree project's goal is to find an economically viable alternative to the time consuming hand-powered water pumps. The power comes from solar energy.
Aggregatstabilitet, jordbearbetning och fosforförluster i ett typområde på jordbruksmark :
Large amounts of phosphorus (P) are lost from the arable land due to water erosion. Both phosphorus attached to particles and dissolved phosphorus (mainly phosphate) are transported away with drainage-water and surface runoff. Good soil structure is important in minimizing these losses.
In this study, soils from 50 fields were analysed with respect to aggregate stability as measured by dispersion of clay together with the content of total phosphorus (TotP), particulate phosphorus (PP) and phosphate phosphorus (PO4P) in the water phase. All soils were clay soils with clay content varying between 21 and 54%.
Mjölkraskvigors tillväxt på naturbete :
To turn the dairy heifers out on pasture is the most natural way for the cattle to get feed.
At the same time it is cheap and if it is right treated a feed of high nutritive value. The
problem today is to get dairy heifers to grow enough when they are grazing at natural
pasture for the entire summer. Therefore, the opinions differ whether pasture is a
resource or a problem.
The increasing interest of pasture production is due to the fact that you can receive
grants for preserving valuable natural assets and cultural landscape elements in the
pasture land.
A high grazing pressure is necessary to preserve an open landscape and a great variety
of species. In the same time the heifers have to supply their nutritive needs in order to
grow and be large enough to show heat and be pregnant in right time to calve with a
sufficient body size and at an economically right age.
This paper includes a literature review on natural pasture, pasture production, and
growth of dairy heifers together with own interviews with dairy farmers about their
point of view to the pasture husbandry on the farms, how they plan for pasture, look
after natural pasture, treatment areas and take care of the calves and heifers. The results
indicate that the time it takes and the demanded work are the biggest factors to how and
why the farmers do as they do..
Vitesklausuler : En begränsning av ersättningsansvaret
Penalty clauses is a term that can be put in an agreement and is an amount that shall be paid by a part of the agreement if they cause any damage to the other part by breaking the agreement. Penalty clauses have since around 100 years ago had a quite clear meaning in Sweden according to a lot of authors. These authors have the opinion that penalty clauses is an exclusive judgment of the compensation the victim has right to, that means that if the parties have put a lower amount in the clause the victim won?t get full coverage for the damages caused by the other party. That the penalty clause is an exclusive judgment of the victims right to compensation means that the victim doesn?t have the right to request other compensation above the compensation in the clause if nothing else is stated in the clause.A penalty clause may be viewed as a complement to compensation you get according to The Tort Liability Act (1972:206) where it is often difficult to obtain full compensation for damages when it is required that a number of conditions are to be met for damages deleted.
Ett bibliotek är ju ingen affär. Om boksvinn på tre svenska universitetsbibliotek.
The intention of this essay is to describe the problems with loss of books at three Swedish University libraries. It?s based on interviews with librarians. The library codes of ethics, the library law and the terms of reference of the libraries are central for my understanding. Interview results: Little was being done to stop theft.
Att hjälpa andra trots risk : motivationen i det internationella biståndsarbetet
The purpose of this study is to examine what motivates people to help others at risk to themselves. The focus is on international aid workers, which in their work put themselves in situations of risk. Earlier research shows that international aid work involves risks such as infectious diseases, violence, death threats, assaults, constant insecurity and risk to be traumatized etc. There is not much research done on what motivates to help others in spite of risks, hence we find this an interesting area. We have interviewed six respondents about the content and character of their motivation and factors that are important for the maintenance and development of this motivation.
Optimering av driftläggningar i Fortums nät
Future emission legislation puts great emphasis on increasing the efficiency of the engine, thereby reducing fuel consumption. The tribological contact between cylinder liner and piston ring is where an great amount of energy is lost due to friction, and by reducing these losses an reduction in fuel consumption can be achieved.The aim of this thesis was to evaluate the tested piston ring coatings against a plasma sprayed cylinder liner and rank these combinations of materials for friction and wear resistance. The coatings that were tested was Cr + Al2O3, (Al,Cr)N, two types of CrN and WC / C.The experimental tests were performed with a so-called pin-plate, where used oil with addition of an acidic mixture of sulfuric and nitric acid to mimic the acidic condensate formed when exhausts recirculate, were added with a continuous flow. The results were then analyzed by weighing, studies by optical microscopy and scanning electron microscopy (SEM) and profile measurements.The results from each material combination were that the plasma coated cylinder liner wears too aggressively in order to yield a ranking of the piston ring coatings based on the parameters of friction and wear resistance. It is therefore proposed that an alternative coating on the cylinder liner should be developed, lacking the large abrasive wear on piston rings and that can withstand the corrosive environment resulting in engines equipped with EGR.