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493 Uppsatser om Solar cell - Sida 17 av 33
Solcellsanl?ggningar p? landsbygden, vad s?ger lokalbefolkningen? En studie om lokalbefolkningens uppfattningar av solcellsanl?ggningar
I samband med en ?kad efterfr?gan och st?rre behov av fossilfri energi kommer storskaliga
solcellsanl?ggningar p? mark att spela en allt viktigare roll. Samtidigt kr?vs ett
h?nsynstagande till lokalbefolkningen som f?r anl?ggningen placerad i sin n?rhet. Tidigare
forskning har visat att b?de ekonomiska, sociala och milj?m?ssiga aspekter g?r att koppla till
n?rboendes acceptans.
Opera i Stockholm, Galärvarvet
Suggestion for a new operahouse in stockholm, förslag på nytt operahus i stockholm. Stockholmsoperan..
Indoor Positioning Using WLAN
This report evaluates various methods that can be used to position a smartphone running the Android platform, without the use of any special hardware or infrastructure and in conditions where GPS is unavailable or unreliable; such as indoors. Furthermore, it covers the implementation of such a system with the use of a deterministic fingerprinting method that is reasonably device independent, a method which involves measuring a series of reference points, called fingerprints, in an area and using those to locate the user.The project was carried on behalf of Sigma, a Swedish software consulting company..
Inlärning i arbetslivet : En studie av utbildningsmaterial- Södra Cell ett exempel
Uppsatsen har undersökt hur ett antal textbaserade utbildningsmaterial avsedda för utbildning inom företagsvärlden utformas i förhållande till olika sätt att förstå och tolka innehåll. De teorier som används som utgångspunkt i undersökningen har varit Howard Gardners inlärningsteori om multipla intelligenser, samt Stuart Halls kommunikationsteori Encoding/decoding. Undersökningen har omfattat tre utbildningsmaterial som används vid Södra Cell Mönsterås som tillverkar pappersmassa, där jag undersökt en teoribok avsedd för utbildning av truckförare, en internhandbok i grundläggande datakunskap samt ett textmaterial avsett för att öka personalens kunskap om hur produktionen av pappersmassa går till. Undersökningen har gjorts i form av fallstudier där varje utbildningsmaterial har blivit ett separat fall. Analysen av materialen har genomförts i form av en riktad innehållsanalys baserad på Gardners multipla intelligenser, i syfte att finna svar på vilka intelligenser som var representerade i utbildningsmaterialet. Utifrån det resultat som analysen gav förde jag ett hermeneutiskt teorietiskt resonemang med utgångspunkt i Halls teori Encodin/decoding i hur brukarna av materialet skulle kunna tolka innehållet, beroende på faktorer som förkunskaper i ämnet och kulturell/social bakgrund. Resultatet av analysen visa att endast ett fåtal intelligenser blev representerade i de olika materialen.
Algoritmer för objektdetektering i SAR och IR-bilder
The first part of the thesis consists of a brief introduction to the general principles of target detection and the sensor-systems used. In the following part there is a theoretical description of the algorithms this thesis focuses on. The detection algorithms described in this paper are called Cell Average, Ordered Statistics, 2parameter and Gammadetector. Two different discriminators called Extended Fractal Features and Quadratic Gamma Discriminator are also described. The algorithms are tested on three different types of data, simulated SAR-pictures, authentic SAR-targets and IR-pictures.
Betongpelare och brand : En utvärdering av 500 °C isotermmetoden
At the beginning of 2011, Sweden started using the European rules for structural design, the Eurocodes, instead of the previous national rules. In both the previous rules and the Eurocodes, it is possible to dimension concrete columns using tabled values. However, the required cross section measurements have increased considerably. Moreover, it is possible to dimension concrete columns using calculations, however, this is unusual.The development of a fire in a fire cell can be divided into the growth stage, the fully developed fire and the cooling phase. The duration of each phase, as well as the temperature, is dependent on a number of factors, e.g.
Inverkan av röjning och gödsling på mikrofibrillvinkeln i tallens (Pinus sylvestris L.) ungdomsved
Tall (Pinus sylvestris L.) är ett av Sveriges viktigaste trädslag. Med ökad efterfrågan på vedråvara samt ökade krav på naturavsättningar är det viktigt att öka produktionen i skogen. Röjning och tidig gödsling ger ökad volymproduktion men kan ge icke önskvärd påverkan på vedegenskaper som ökad mikrofibrillvinkel (MFV). MFV är vinkeln mellan mikrofibrillerna i cellväggens S2-lager och cellens längdaxel och påverkas av ståndort samt konkurrensen om ljus och näringsämnen. Höga MFV resulterar i sämre kvalitet på papper och sågade trävaror.
Tidsberoende kvantkemiska beräkningar av optisk absorption hos polymerer och molekyler med litet bandgap
The vertical electronic excitation energies for the narrow-bandgap polymers LBPF, EP37 and EP62 have been calculated using Density Functional Theory (DFT). Also the vertical excitation energies for the acceptor unit of LBPF have been calculated using the Hartree-Fock (HF), DFT and Coupled Cluster (CC) methods. The calculations cover the visible and infrared wave length region and two strong transitions are obtained, one corresponding to the pi to pi* transition and one corresponding to the pi to Acceptor transition. The excitation energies obtained from DFT are below the corresponding experimental results and attempts have therefore been made to perform bench-marking calculations using a hierarchy of CC methods..
Simulering av värmebehov för kombinerad kontors- och laboratoriebyggnad utan traditionellt värmesystem
In this Thesis the possibilities of designing a larger building that is very energy efficient in the sense that it would not need a conventional heating system are discussed. Solar radiation transmitted through the windows, internal heat from occupants, lamps and electric appliances inside the building and heat recovered from the ventilation system then have to be sufficient for the heating of the building. This study is of general interest since the property company, Akademiska Hus, plans to use this study as a first step in determining if this technique could be used in the future and thus be worth further investments. A building without a conventional heating system of the size investigated in this project has not yet been built.The energy needed for the heating of the building was simulated using VIP+.The conclusions from the study are that it is possible to build large buildings without any conventional heating system. This could be achieved in many different ways, for example by lowering the inside temperature or by using better windows and heat recovery system with higher efficiency.
Förstudie för automatisering av manuell lödning
This degree project has been carried out in cooperation with Enertech AB in Ljungby and is pilot study to automating all current manual soldering. The soldering process accounts for a large part of the processing cost in the production of a heat pump. The process is also a quality risk and has a major impact on the lifetime of the final product.The Main task of this project has been to evaluate automation of the soldering process, to develop automation solutions and a principle layout, to draw the design changes required for the automation and to calculate the supposed solution.This pilot study has resulted in a suggested automation solution using laser as a heat source for soldering. Calculations of the solution show that a automating a laser soldering cell is very profitable..
Säkerhetsaspekter vid laddning av elfordon innehållande litium-jonackumulatorer: beskrivning av risker samt en studie av kontrollerande regelverk
Fortum har i samarbete med Stockholms stad presenterat en gemensam vision för att göra Stockholm till en av världens främsta miljöbilsstäder till 2030. Ett viktigt led i detta mål är introduktionen av nya elfordon innehållande litium?jontekniken på den svenska bilmarknaden. Då det befintliga regelverket angående laddning av ackumulatorer i fordon inte nämner den nya tekniken har frågeställningen kring luckor i lagstiftningen lyfts fram av Fortum. Det övergripande syftet med studien har varit att undersöka risker och regelverk kring laddning av elbilar innehållande litium?jonackumulatorer.
Två presentationstekniker för grafer : deras styrkor respektive svagheter inom en bioinformatisk kontext
This degree project has been carried out in cooperation with Enertech AB in Ljungby and is pilot study to automating all current manual soldering. The soldering process accounts for a large part of the processing cost in the production of a heat pump. The process is also a quality risk and has a major impact on the lifetime of the final product.The Main task of this project has been to evaluate automation of the soldering process, to develop automation solutions and a principle layout, to draw the design changes required for the automation and to calculate the supposed solution.This pilot study has resulted in a suggested automation solution using laser as a heat source for soldering. Calculations of the solution show that a automating a laser soldering cell is very profitable..
Ideellt kårengagemang - Drivkrafter och resultat
The purpose of this study was to examine how modern information and communication technology influence collective action within the framework of social movements. By studying the protests in the Arab World 2011, and focusing on the social movements in Suleimanya in northern Iraq, by observation taken on place, the essay discusses that collective action is closely related to the use of technology, for example cell phones and Internet.Result shows that modern communication technology has enabled immeasurable access andconnection between individuals throughout the world, which seems to be different from previouscollective action. The new communication channels in the form of social media, has been used for the dissemination of information and news, documentation, organization and membership recruitment in the social movements in the Arab World and Suleimanya. The new social movements have the tendency to be decentralized and flattened organized, they are now self-organizing and that they only do a whole as global patterns, as evidenced by the social movements in the Arab World andSuleimanya..
Effekten av arktiskt klimat på inre kvalitet hos bär
This project is a literature study with the hypothesis that Arctic climate has a positive effect on the accumulation of metabolites in berries. Plant metabolites are often divided into primary and secondary metabolites. Primary metabolites such as proteins and nucleic acids are essential for cell function, while secondary metabolites are often non-essential, but have important functions regarding reproduction and survival. The berries mentioned in this project are from the families Ericaceae, Rosaceae, Elaeagnaceae och Grossulariaceae.The conclusion drawn from this literature study is that it is not obvious what favours accumulation of metabolites in berries. Other factors aside from climate affect the production of secondary metabolites, such as time of harvest, cultivars and ripeness.
Effect of insulin during oocyte maturation in vitro on bovine early embryo development : partially evaluated by novel fluorescent staining
Fertility is of central interest in the dairy production but has during the last decades declined. Increased milk yield has resulted in high pressure on the metabolism of the dairy cows that are supposed to manage the transition from dry cows to lactating cows within a few weeks around the parturition. Much indicate that metabolism and fertility are closely linked, with insulin playing a substantial part. There are many studies suggesting that the main part of gestation loss can be found during the early embryo development, a period which can be studied in vitro. The aim of this study was to test the effect of insulin during maturation in vitro and to evaluate two different fluorescent stainings on oocytes and embryos; a nuclear stain and a staining of apoptotic cells through the terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL)-method.
Bovine cumulus-oocyte-complexes (n=991) were aspirated from abattoir-derived ovaries.