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667 Uppsatser om Temperature dependence - Sida 15 av 45

Drainfill

Ocean Thermal Energy Conversion, OTEC, a technology using the temperature difference between cold deep seawater and warm surface water, can extract the work in the form of electricity. OTEC gives also synergies of drinkable fresh water. The temperature difference has an impact on the efficiency of the technology, which means that the feasibility of OTEC is geographically limited. The project intends to explore the possibility of replacing the atoll Tarawa?s present electricity generation with an OTEC plant and to explore synergies. In the present situation all of Tarawa?s electricity is generated by fossil fuels.

Filosofen som arkitekt : Subjektivitet och metaforik i Discours de la méthode

In this paper, I have proposed a way of interpreting the philosophical subject of the Discours de la méthode that has remained relatively unexplored by contemporary commentators. By investigating the subjectivity that is expressed through Descartes? use of architectural metaphors, I laid bare some of the difficulties inherent in its discursive structure, as well as suggesting that the cogito in fact repeats and inscribes itself into this structure. In this context, the metaphor of the road (or travel) takes a supplementary role in relation to the architectural metaphor, marking the very conditions of existence of the architectonic subject. The subject, in order that it may establish itself as ?pure? and ?independent? thought, is dependent on a certain ?forgetfullness?; that is, only by forgetting its constitutive dependence on the diversity and historicity that is signified by the metaphor of travel, can it establish itself as its own source.

Effektivt nyttjande av högeffektslysdioder i mobil belysning

The purpose of this master thesis has been to find different solutions to the design of a headlamp with a cluster of three or possibly four high power LEDs (Light Emitting Diodes). During the work, two different problems have been considered; how to design a lens in order to shape the light beam in a desirable way, and how to design a cooling system which will lower the temperature of the LEDs as efficiently as possible, still taking into account the geometry set by the optical solution as well as other given geometries. The results presented in this thesis are partly the outcome of a literature study, but derive mainly from a number of tests and measurements made on two test rigs and one concept prototype..

Småskalig säsongslagring av solenergi för uppvärmning av bostäder : Simulering av lagerutformning och konsekvensen av adderade uppvärmningsbehov motsvarande en pool och ett atrium

The sun is a huge energy source with great potential of providing energy to the heating of homes and other buildings in an environmentally sustainable manner. In order to provide buildings with energy from the sun it is necessary to transfer the energy supply over time to when the demand arises. By storing the heat in a seasonal storage, solar energy from the summer can be used in the winter when the demand for heating is greatest.Today's existing plants are mainly in Europe and particularly in Germany. These facilities are designed to supply heat demands greater than 400 MWh and covers about 40-50 % of this need which consists of energy for space heating and domestic hot water. How much of the heat demand that is covered, the solar fraction, is partly due to losses from the storage which in turn is connected to the surface area of the storage.

Utredning om huruvida Dalarnas Tidningars produktion passar en KBA Cortina

This degree project illustrates newsprint and waterless offset. A new news press was introduced at Drupa-00, Cortina from KBA, which is the first news press dedicated the waterless technique. With actual statistics from the company in question an investigation was made whether their production fits this press. It came out in the investigation that the production of the company, from statistics, fits this press very good. A table was made where different timeschedules were accounted for the new press, with semi- and full automatic plate changing for present and to be added papers.

Hygienisk kvalitet hos svensk älgfärs med avseende främst på förekomst av koagulaspositiva stafylokocker och Escherichia coli :

In this study the hygienic quality of minced moose meat was examined with regard to the prevalence of different bacteria. The methods used are described in NMKL, "Nordic Method Committee for Food". The results show that the levels of Escherichia coli and coagulase positive staphylococci in the meat are too high. The reason for this might be environmental factors, such as high temperature and humidity during the time when the carcasses are hanging and when the meat is cut up..

Steget från stort småföretag till litet storföretag - Ett inköpsperspektiv

Den här uppsatsen behandlar ett problem som identifierats bland små till medelstora svenska modeföretag: det stora beroendet av outsourcade produktionsagenter och fullprisproducenter. Syftet med uppsatsen är att identifiera de förutsättningar och hinder dessa modeföretag kan stöta på när de försöker integrera dessa utlagda kompetenser till en intern lösning. Genom detta hoppas författarna kunna tillföra nya perspektiv för befattningshavare som är intresserade av att omstrukturera sin nuvarande inköpsmodell.De metoder som använts för att samla in det teoretiska och empiriska underlaget var skrivbordsstudier, såväl som strukturerade och ostrukturerade djupintervjuer med grundaren av ett svenskt jeansföretag, samt en anställd på en stor svensk modekedjas inköpsavdelning.Resultaten understryker den strategiska betydelsen för växande modeföretag att äga sin inköpsfunktion. Genom att äga kompetenserna för mönsterkonstruktion och inköp kan företag minska sitt beroende av externa organisationer och öka flexibiliteten i sin produktutvecklingsprocess. De hinder som identifierats utgörs bland annat av en ökad affärsrisk under övergången till en intern inköpsavdelning till följd av avsiktliga störningar i värdekedjan av producenterna, samt de extra kostnaderna för det ökade administrativa arbetet.This essay focuses on a problem identified among small to mid sized Swedish fashion companies: the large dependence on out sourced production agencies and full price producers.

I globaliseringens vågrörelse; en etablering i Lycksele kommun.

This study describes how a larger investment by a private company in the northern interior can affect a municipality?s economy. The mobility to the municipality is expected to increase and some of the direct and indirect effects that this investment can implicate on their economy are discussed. The method for this study is qualitative. Interviews have been made with the initiative owner of the company LHG Learning Center and with civil servants in the municipality of Lycksele. The conclusions drawn in this study are that the establishment of LHG Learning Centers in Lycksele will include both opportunities and risks for the municipality?s future.

Eurons dolda agenda Hur externa faktorer kan förklara skapandet av EMU

The aim of the thesis is to highlight external factors to explain why the EMU was created. The external factor considered here is the monetary policy of the United States, which often conflicted with European interests. The statistical data in the thesis, as well as previous research, show that even though the EU economically in many ways had become an equal partner of the US during the second half of the 20th century, the union still faced US influence and dependence.The results of the thesis can be explained with neorealist theories on power measured as an actor's distribution of capabilities and balancing of power. An actor that is equipped with the world's leading currency is more independent from others. Other actors, on the other hand, become increasingly dependent on the major currency and the policy of its owner.

Temperaturmätning på gris - en jämförelse mellan infrarödmätning på hud och rektaltemperatur

Under en tidsperiod på tretton veckor mättes temperaturen på tvåhundratjugo suggor och etthundraåttiotre smågrisar i grisningsboxar vid SLUs forskningsanläggning. Vid varje mätningstillfälle mättes rektaltemperatur samt hudtemperatur på tryne, öra, bog, länd och vulva. Varje mätområde på huden mättes tre gånger vid ett mättillfälle, två olika IR-termometrar användes. Detta innebar totalt ettusen etthundra enskilda mätningar på suggor och niohundrafemton mätningar på smågrisar. som samlades in och analyserades avseende korrelation mellan de olika mätområdena på huden och rektaltemperaturen.

Klimat i miljökonsekvensbeskrivningar : hantering av klimatförändringar och extrema väderhändelser i MKB

There has always been global warming on earth and it is because of it that the earth is inhabitable. Without global warming the temperature on earth would be around -18 ° C instead of today's + 15 ° C. Global warming is generated by greenhouse gases like carbon dioxide and methane which trap long wave radiation in the earth's atmosphere. The problem today is that the global concentration of green house gases has significantly increased since the 1750's as a result of human activity. Today's values widely exceed the preindustrial values.

Framtagning och miljömärkning av kvicksilverfri xenonstrålkastare

The project this report is handling has been implemented on NBB, Nordisk Bilbelysning AB in Linköping. The company produces and develops lightning and searchlights for all types of vehicles. Lately NBB´s supplier of electronics, OSRAM, has developed a mercuryfree xenon lightsource. Mercury is one of the most hazardous environmental waste and to get rid of the mercury entirely in the lightsource is a big step that means alot for the environment.This lightsource will be placed in one of NBB´s worksearchlights called My, and will be sold as an alternative to mercurycontaining searchlights. NBB wants to put an environmental label on this product and they want to have essential information about the product that is needed for the production.

Making Money in a Dirty Business

Academic research concerning how to determine the power situation in a supply chain where an investment product supplier is involved did not exist. Therefore new models has been developed that analyses the power relations and maps out the power situation in a supply chain. In the future these models can be applied on similar cases by modifying the included parameters. The new models show that case company FAS should focus on the big producers of garbage bag which are Trioplast, Rullpack and Miljösäck. By strengthen the brand FAS can make more money in these relations.

Utveckling av en LC-MS-metod för analys av gamma-hydroxibutyrat, gamma-butyrolakton, 1,4-butandiol, amfetamin och metadon

In this project a LC-MS-method for the analysis of gamma-hydroxybutyrate, gamma-butyrolactone, 1,4-butanediol, amphetamine and methadone was developed.Initially, the efficiency of the ionisation of the analytes was evaluated with respect to the ionisation technique (ESI, APCI and APPI) and the composition of the mobile phase. In the next step a number of different columns was tested in order to find the one with the greatest potential for separation of the substances in question. Using the selected column, the separation was optimised by means of experimental design and the software The Unscrambler 7.8. The parameters studied were the flow rate, the column temperature and the mobile phase composition. The response variables were the resolution between the target compounds and the retention time of the last eluting compound.These experiments showed that, in order to obtain the best ionisation, the mobile phase should consist of 5 mM formic acid in water and acetonitrile.

Energy efficient storage of biomass at Vattenfall heat and power plants

Storage of biomass is often associated with problems such as heat development, dry matter losses and reduction of fuel quality. The rise in temperature can potentially cause a risk of self-ignition in the fuel storage. Moreover, emissions from storage piles can cause health problems in the surrounding. The dry matter losses and reduction of fuel quality can have economical effects. The aim of this thesis project is to develop guidelines on how to store large amount of biomass at Vattenfalls heat and power plants in an optimal way.

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