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2090 Uppsatser om Green energy - Sida 46 av 140

From industrial past to sustainable future : Arboretum Lövholmen; generating trees for a greener future

Old industrial sites bear witness of the unsustainable industrial developments in the past. Today many of them stand abandoned and empty, old structures lacking function in our present society. We have in this thesis participated in a visionary student competition arranged by IFLA, International Federation of Landscape Architecture by developing a proposal based on a vision of how Stockholm can stimulate a greener development. We have done this by turning an unsustainable industrial site in the city into an ecological node; Arboretum Lövholmen. Our aim is to develop an entry for IFLA?s visionary student competition by creating a new sustainable design for the industrial area of Lövholmen in Stockholm. We have worked with the following research questions: How can we create a visionary design proposal for Lövholmen that promotes sustainable development with the help of ecological design? How can the competition format be a design tool? How can the working process developing a competition entry progress? The competition demands have shaped our working process and functioned as a platform for the structure of this thesis.

Genetiska och epigenetiska samband mellan näringsförsörjning och fertilitet hos mjölkkor

The dairy cow?s ability to resume estrus after calving and to conceive is affected by their metabolic status after calving. For high yielding cows there is a high risk that the feed intake will not be sufficient to cope with the increased energy demands after calving, and the cow will end up in a state of negative energy balance. Energy balance can be measured in various ways, for example by body condition score or by plasma concentration of several metabolic hormones and metabolites. After calving, endocrine pathways stimulate tissue mobilization; insulin signaling is blocked, the concentration of insulin-like growth factor-1(IGF-1) and leptin decreases, and the concentration of growth hormone (GH) increases.

Comparison of real-time PCR assays for screening of meticillin-resistant Staphylococcus aureus

Staphylococcus aureus belongs to the normal flora. Many healthy people are colonized by the bacterium mainly in the nose but also on the skin and on other mucous membranes without showing symptoms. After damage to the skin, the bacterium can enter the wound and cause infections. Methicillin-resistant S. aureus (MRSA) is resistant to b-lactam antibiotics such as penicillin and methicillin.

EMC problematik och el-kvalitet i elkraftnät

The dissertation deals with an account of actual problem, which can arise within EMC and power quality. The cause of power interruption and what can be done to minimise the power interruption is discussed. It also includes a definition of planning levels and which factors one needs to have control over to carry out a possible planning strategy and how the local distributions net could be more secure. The electrical net could be secure but no system can be free from interruption.The dissertation examines two distribution transformers: GLA40T1 (Glansås) and T399 in Tranås Energy which don?t have regulators.

Byggnadsutformningens inverkan på energianalysen : En jämförande utvärdering av två energisimuleringsprogram

Since the demands from authorities regarding lower energy consumption havebecome increasingly strict, this puts new pressure on designers and builders, who notonly have to ensure an esthetically pleasing building, but also make sure it issufficiently efficient to pass under new laws and regulations.This thesis takes into consideration a wide range of various parameters and theireffect on a building?s energy consumption. For this evaluation a computer softwarecomparison between the two programs Autodesk Ecotect Analysis and AutodeskProject Vasari was performed.Autodesk Ecotect Analysis is better suited for studies made on individual factors whileAutodesk Project Vasari is better used in experiments regarding the geometricalshape of the stucture itself.The results from the two different software tools used, give us both differences andsimilarities. For instance, both software programs produced the same resultsregarding the importance of the windows of the buildings to ensure a highly energyefficient building, both when it comes to the windows size and their U-value..

Kolbalansen vid olika skötselstrategier för skogen på Tagels fastighet.

Since the 19th century the concentration of CO2 in the atmosphere hasincreased by 40 percent as an effect of the use of fossil energy sources.Increased concentration of CO2 will likely lead to increased temperature,changes in precipitation, rising sea level and increased frequency of extremeweather like storm events. A step to reduce emissions of CO2 and mitigateclimate change, for the property of Tagel, can be to adopt new silviculturalstrategies and analyse which is the most effective. As a result of that, threescenarios was produced, business-as-usual (BAU), increased set aside landand energy. An introduction of windpower at Tagels estate (property) andeffects on carbon balance was also examined. By using the Heureka systemand LCA-analysis in this study, it showed that the scenario of increased setaside land was the most efficient way to reduce carbon dioxide (CO2)emissions for the analysed period of 100 years.

Stöldskydd

To save energy it?s popular to build houses with low energy loss. In these houses the walls are keeping a lower temperature in the external side which leads to a higher relative humidity. In addition more material, such as wood studs, are used which means that there is more moisture to dry. More moisture in combination with higher relative humidity may pose a higher risk of microbial growth.

oikos ? nomos eller logos? : Hållbar utveckling och ekonomi i gymnasiets samhällsböcker

This paper contains an analysis that sets out to investigate how sustainable development is portrayed in textbooks used in gymnasium level civics education. The study covers three textbooks, all in current use. The paper sets out to explore the relationship between the books chapters on economics and those about environmental issues. The sum of these two parts is in the context supposed to make up the books big picture of green sustainable development, i.e. the ecological aspect of sustainable development. An analytical model will be used to categorise and compare the three textbooks.The method chosen for this is analysis of ideas by use of ideal types.

Energieffektiva byggnaders påverkan på CO2-utsläpp : Norra Djurgårdsstaden i samarbete med Grontmij AB

Detta examensarbete har genomförts i samarbete med Grontmij AB och är ämnat att ta fram tre olika förslag på byggnader med samma utformning men uppförda med olika material i klimatskal och stomme, för att jämföra dess energiförbrukning och slutligen analysera koldioxidutsläppen som genereras. Målet med denna studie är att påvisa vilka material som lämpar sig främst vid hållbart byggande, vilka materialval som främst kan föredras när man vill uppnå energieffektiva byggnader samt analysera dess koldioxidutsläpp.Målet är att påvisa att koldioxidutsläppen minskar med enligt de upprättade miljökraven från Stockholms Stad i samarbete med Clinton Climate Initiative.Climate Positive Development Program lanserades år 2009 och är ett gemensamt initiativ mellan Clinton Climate Initiative och US Green Building Council. Programmet stödjer 18 projekt världen över och Norra Djurgårdsstaden är ett av projekten som ska vara en förebild för framgångsrik ekonomisk och miljömässig stadsutveckling. Programmet är även en vägledning vid byggande av bostäder vilket är avgörande för evolutionen av stadsbygget.Utvecklingen kring byggande har med tiden förändrats och anpassats till mer miljövänliga och energieffektiva alternativ. Idag har det blivit mer vanligt att tala om energieffektiva byggnader och minskade koldioxidutsläpp, vilka är betydelsefulla faktorer som påverkar miljön och vår framtid avsevärt.

Grödreflektans och bildanalys för bestämning av biomassa i fältförsök

I traditionella fältförsök har den vanligaste metoden för att bestämma biomassa ochkvävemängd varit att klippa prover i den växande grödan. Denna bestämning blirtidskrävande och på så sätt dyr, vilket gör den svår att utföra flera gånger under enväxtsäsong. Efterfrågan har därför vuxit efter en tillförlitlig metod som är effektiv och somdärmed gör det möjligt att mäta med tätare intervaller, men som ändå inte är oskäligt dyr.Detta examensarbete har inriktat sig till att undersöka om grödors reflektans som mäts meden hyperspektral sensor kan vara användbar för att bestämma biomassa, kvävemängd ochkvävehalt och på så vis vara användbar i försöksverksamheten. Dessutom har metodenbildanalys jämförts med sensormätningar.Försöket startade 2010-04-16 och pågick med löpande mätningar till 2010-06-30 i sjujordbearbetningsförsök. För att mäta reflektansen har Yara?s handburna sensor använts,vilken mäter grödreflektansen mellan 400 och 1000 nm.

Miljöeffekter av alternativa system för behandling av hushållsavfall i Santiago, Chile : en jämförelse mellan deponering och förbränning med energiutvinning

This report was written by Lisa Bengtson and Hanna Paradis and describes the degree thesis "Environmental impacts of solid waste treatment in the Metropolitan Region, Santiago, Chile ? a comparison between current system and incineration with energy recovery". The purpose of this thesis was to investigate if incineration with energy recovery could be motivated through an environmental perspective as an alternative to landfilling of solid waste in Santiago, Chile. The study was performed with Life Cycle Analysis as a theoretical base. In Santiago, situated in the thirteenth region of Chile, Región Metropolitana, lives 6,5 million inhabitants. The major part of the solid waste produced in the region is landfilled on three different sanitary controlled landfills situated outside the city center.

Insatser och åtgärder för främjandet av laddelbilar i Sverige

To achieve the goal of fossil independency in the Swedish vehicle fleet in 2030, it would be important to substantially increase the proportion of electric vehicles, both BEV:s (Battery Electric Vehicles) and PHEV:s (Plug-in Hybrid Electric Vehicles). The Swedish Energy Agency has funded numerous research and development projects about electric vehicles in recent years. An important task for the Swedish Energy Agency is to allocate state funds to those projects with the greatest potential to contribute to increased establishment of electric vehicles in society. The purpose of this work is mainly to understand the efforts and measures that can make the market for electric vehicles to grow. The report can contribute to a better understanding of how far the research on electric vehicles has come and what has to be done in the future to promote the establishment of electric vehicles. Another aim for this report is that it should serve as a basis for future decisions by the Swedish Energy Agency on which projects that will be funded with state funds.

Rhododendron och dess skadegörare

Swedish energy policy aims to increase the use of energy from renewable sources and this should be done in a safe, environmentally and sustainable manner. According to the Energy Agency the use bio-fuel increased by 73% between 1990 - 2006. Stands with high share of slash are often located on areas with high productivity which often are located on soils with poor bearing capacity. This will increase traffic on susceptible soil leading to increased ground damage. To reduce the risk of ground damage at slash-forwarding, ground protection is needed.

Viktoptimering av ett kompositchassi till en multimodal lättviktsfarkost

This report describes the master thesis project ?Weight Optimization of a Composite Chassis for a Multimodal Lightweight Vehicle? which is a part of the Master program in Naval Architecture and a part of a research project at the Centre for Naval Architecture, KTH. Demands on smart and energy efficient transport solutions are continuously increasing. In the Stockholm region the citizens are expected to increase with 25% and the road vehicles with 80% until 2030, putting high demands on the traffic system. Using a small multimodal vehicle deals with this problem and uses both the land and waterways for transportation.

Reducering av markskador vid GROT-skotning

Swedish energy policy aims to increase the use of energy from renewable sources and this should be done in a safe, environmentally and sustainable manner. According to the Energy Agency the use bio-fuel increased by 73% between 1990 - 2006. Stands with high share of slash are often located on areas with high productivity which often are located on soils with poor bearing capacity. This will increase traffic on susceptible soil leading to increased ground damage. To reduce the risk of ground damage at slash-forwarding, ground protection is needed.

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