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Literatura científica selecionada sobre o tema "Miljöteknik"
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Teses / dissertações sobre o assunto "Miljöteknik"
Jansson, Alexander, e Niklas Wågström. "Matchningen Miljöteknik - Venture Capital på den svenska marknaden". Thesis, Uppsala University, Department of Business Studies, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-88802.
Texto completo da fonteUppsatsen behandlar miljöteknikbranschen och venture capital branschen. Vi undersöker vilka investeringsvariabler venture capital investerare intresserar sig för och hur de prioriteras vid investeringsbeslut. Resultaten används för att undersöka hur väl miljöteknikbolagen på den svenska marknaden motsvarar investeringskriterierna. Undersökningen har genomförts kvantitativt genom att enkäter har riktats till 83 venture capital bolag på den svenska marknaden och till 200 miljöteknikbolag. Frågorna har vi ställt i matchande par till respektive bransch för att tydliggöra skillnader och likheter och utan respondenternas vetskap om syftet att matcha branscherna för att undvika vinklade svar. Resultaten visar att en majoritet av de investeringskriterier vi identifierat matchar, 11 av 27 kriterier. Sex investeringskriterier matchar inte och tio investeringskriterier har vi inte kunnat dra några slutsatser av. Den segment analys vi utförde visar att energieffektivisering är det segment som bäst matchar investeringskriterierna och energigenerering visar på den sämsta matchningen.
Edström, Evelina, e Martin Hillström. "Produktutveckling miljöteknik : Framtagning av produkt som varnar vid förskämning av mjölk". Thesis, Mälardalens högskola, Innovation och produktrealisering, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-35752.
Texto completo da fonteForsström, Jennie. "Fundamental Aspects on the Re-use of Wood Based Fibres : Porous Structure of Fibres and Ink Detachment". Doctoral thesis, KTH, Fibre and Polymer Technology, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-84.
Texto completo da fonteIn this work, different aspects on the re-use of wood based fibres have been studied, focusing on ink detachment of flexographic ink from model cellulose surfaces and changes in porous structure of kraft fibres following different treatments. New model systems for evaluation of ink detachment and ink-cellulose interactions were used. Ink detachment was studied using Impinging jet cell equipment, taking into consideration the influence of storage conditions, surface roughness and surface energy of the cellulose substrate. A micro adhesion measurement apparatus (MAMA) was used to directly study ink-cellulose interactions, from which the adhesive properties between ink and cellulose, having various surface energies, could be derived. UV-light, elevated temperatures, longer storage time, decreased surface energy, i.e. making the cellulose surface more hydrophobic, and high surface roughness all negatively affected ink detachment. Attenuated total reflectance - fourier transform infra red (ATR-FTIR) and atomic force microscopy (AFM) was used to evaluate structural and chemical changes of ink and cellulose upon storage at elevated temperature or under UV-light. After storage at elevated temperatures, ATR-FTIR spectra indicated that a hydrolysis or an oxidative reaction took place as a peak at 1710 cm-1 appeared. AFM revealed that storage at elevated temperatures caused the latex particles present in the ink to form a film, most likely due to annealing. Less ink detached from hydrophobic cellulose surfaces. Ink detachment decreased for rougher cellulose substrates due to an increased molecular contact area.
Fibre pore structure and water retaining ability influenced fibre/fibre joint strength and different paper strength properties. Investigations took into account the effect of pulp yield, counter-ion types, pH, salt, hornification and strength enhancing additives. Nuclear magnetic resonance relaxation (NMR), inverse size exclusion chromatography (ISEC) and water retention value (WRV) measured the changes that occur in the fibre wall upon varying the conditions. Each different measuring technique contained unique information such that a combination of the techniques was necessary to give as complete a picture as possible over the changes that occurred in the fibre wall upon varying the conditions for the fibre. A correlation between fibre pore radius and sheet strength properties was found, suggesting that fibres with larger pores allow for a larger molecular contact area between fibres to be formed during drying and consolidation of the paper. Fibre/fibre joint strength, fibre flexibility, and the number of efficient fibre/fibre contacts also controlled sheet strength. The effect of different strength enhancing additives on fibre pore structure and paper strength was investigated. Larger pores in the fibres allowed for additives to penetrate into the fibre wall. Additives with low molecular mass (Mw) penetrated into the fibre wall to a larger extent than additives with a high Mw, causing an embrittlement of the fibre. However, low Mw additives gave higher sheet tensile strength despite a leveling out in strength at high additions, indicating that the fibre wall can only adsorb a limited amount of chemical. Polyallylamine hydrochloride (PAH) and polyelectrolyte complexes (PEC) of PAH and polyacrylic acid (PAA) were added separately to the pulp. PEC significantly improved both tensile strength and Z-strength, whereas PAH alone did not increase the strength properties to the same extent unless the sheets were heated to 150°C for 10 minutes. The results suggested that the effect of PEC was dominated by an improvement in fibre/fibre joint strength, whereas the effect of PAH was significantly affected by an improvement of the intra-fibre bond strength
Jalvemo, Maria. "Att använda omvärldsanalys för att identifiera efterfrågan och behov av miljöteknik : en metodstudie". Thesis, KTH, Industriell ekologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32758.
Texto completo da fonteThis essay presents the results of an MSc thesis comprising of 20 points (30 ECTS credits) at the Royal Institute of Technology, Stockholm, Sweden. The thesis is carried out as a part of a project at IVL Swedish Environmental Research Institute. The aim of the project is to use Business Intelligence, in the form of Market Intelligence, to identify and spread knowledge about need demand for environmentally adapted products, services and systems in Poland, Ukraine and north-western Russia. This information will later be passed on to companies in the Stockholm area who work with environmentally adapted products. The project is financed by NUTEK and is also a part of the projects Stockholm Sustainable Region and Regionalt TillväxtProgram (Stockholm Regional Growth Programme). The main problem for the thesis is: How can need and demand for environmentally adapted products in a certain region be identified by using Business Intelligence tools? The thesis includes two main parts: The first is a literature study which describes and discusses a variety of Business Intelligence models and methods. The second part consists of a interview study where different operators, such as educators and entrepreneurs, within the field of Business Intelligence, are asked about their experiences from working with BI in analysing need and demand. The Business Intelligence models and methods presented as a part of the result from the literature study have been chosen on the basis of certain questions. The central questions posed are: 1) How is the analysis carried out? and 2) What factors in the surrounding area are treated within the analysis? The different BI techniques have been divided into three categories: The first category; Theoretical BI models, represents a way to look upon and structure one’s surrounding environment. Examples of theoretical models are SWOT, PEST, Stakeholder Theory and Porter’s Five Forces. The second category; Practical BI methods, signifies concrete methods, often in the form of a number of steps to be followed, that describes an example of how to analyse need and demand for a certain product. Examples of practical methods are Interviews, CAT, The Seven Step Model in BI and World Mapping Method. The third category is called Scenario- and Trend Models. Scenario Modelling is a way to build possible future scenarios to help a corporation to be ready for and adapt to different potential situations. Examples of Scenario Models are Scenario Planning and Porter’s Industry Scenarios. Trend Models can be explained as qualified estimations about which upcoming trends will be important to the corporation in the future. Examples of Trend Models are TAIDA and Trend Surveillance. The various BI models and methods have been compiled into three charts and further discussed regarding advantages and disadvantages and to what extent they consider certain BI categories and factors in the surrounding area. The interview study within the thesis consists of interviews with nine operators within the field of Business Intelligence. These operators can be found within the academic sphere, chambers of commerce, the environmental area and various businesses which provide education and consulting within the field of BI. The operators were asked questions about how they implement Business Intelligence models and methods to identify need and demand. Questions that were discussed were, among others, which of the existing BI models and methods they prefer to use and whether they have developed a method of their own, together with a broader discussion about exporting of environmentally adapted goods. The answers from the interviews showed that those who use traditional BI models and methods are foremost the same persons that have a background in marketing. Several among the interviewees had developed their own methods to use while some did not use any specific method at all. The core conclusion from the literature and interview studies is that the choice of BI model and/or method to identify need and demand must be thoroughly adapted to what type of analysis that is to be carried out and what the expected results are. Key factors are, among others, who is to perform the analysis, what resources are needed, what type of decision the analysis will underlie and what type of information will be searched. The traditional models and methods share a few common disadvantages: They tend to be restricted in how they look upon the surrounding world, they are often very fixed regarding the information search and they require large resources. To use a method that is of a freer variety and based on the current purpose, ad hoc, comes with other risks: It tends to overlook potentially important areas and the information gathered is more likely to be biased. A suitable analysis to identify need and demand should consist of a combination of traditional approaches and methods, but also be based on the analyst’s own experiences and knowledge. This assumes that the analyst has a wide understanding for and experience within the field of Business Intelligence and/or the topical area, which in this case is environmentally adapted products. Theses, methods and procedures should be carefully presented. A BI analysis with an aim to enable export of environmentally adapted products has certain characteristics, regarding the link between need and demand: The demand can be determined by other factors than the actual need, such as regulations from the EU, financiers or trends.
www.ima.kth.se
Hedin, Jonas. "Konceptuell arbetsmodell för miljöanpassad produktutveckling inom trämanufaktur". Thesis, Linköping University, Department of Management and Engineering, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-11276.
Texto completo da fonteSom en följd av en ökad miljömedvetenhet i samhället och ett initiativ för att utveckla miljövänligare möbler, så syftar det här examensarbetet till att ta fram en arbetsmodell för miljöanpassad produktutveckling för möbelindustriföretaget EFG. För det resultat som presenteras i och med denna rapport, så har arbetet bedrivits i ett nära samarbete mellan EFG och Linköpings tekniska högskola, liksom att utvecklingsarbetet har utförts vid EFG:s huvudkontor och produktionsenhet i Tranås.
Den arbetsmodell som har utvecklats för att bedriva miljöanpassad produktutveckling utgår utifrån två etablerade arbetsmodeller men har genom en utvecklingsprocess anpassats för att tillgodose företagets behov och rutiner för produktutveckling. Arbetsmodellen beskrivs till sitt utförande av ett steg-försteg- verktyg som kompletteras med verktyg enligt:
• Checklistor
• Ekostrategihjulet
• Materialmatris
• Processträd
Arbetsmodellen som kompletterats av verktygen ovan, förväntas tillsammans med steg-för-stegverktyget att utgöra det underlag som syftar till att bedriva miljöanpassad produktutveckling vid EFG. Den har således anpassats för att tillgodose företagets förväntningar och som genom hela utvecklingsperioden främst har utgått från tre kriterier. Kriterierna för arbetsmodellen råder:
• Tidseffektiv
• Högt resursutnyttjande
• God miljöanpassning
Arbetet förväntas således att bedrivas enligt integrerad produktutveckling och sker parallellt med de aktiviteter som bedrivs enligt företagets nuvarande rutiner för produktutveckling. Genomloppstiden för projektet förväntas vara relativt kort, liksom utnyttjandegraden av företagets resurser för kompetens och produktionsteknik. I relation till det beslut och de resurser som avsatts för att ligga till grund för en miljöanpassning, så skall resultatet slutligen generera en god miljöanpassning av produkten.
Målgruppen för rapporten är främst de personer som koordinerar i miljö- och produktutvecklingsarbete, men för utvalda delar liksom de verktyg som presenteras, så avser dessa att användas för personer som är involverade i miljöanpassad produktutveckling. Arbetsmodellen presenteras slutligen i rapporten i form av en plansch där arbetet illustreras för en överskådlig förståelse till arbetsmetodiken och tillämpningen av verktygen. Planschen kan således vara lämplig att tillhandahållas för samtliga personer som involveras i arbetet.
Rehnmark, Henric, e Josefin Nyström. "Stöttning av miljöteknikföretag : Erfarenheter från fyra svenska miljöteknikcentrum". Thesis, Linköping University, The Tema Institute, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-12078.
Texto completo da fontePå senare år har begreppet miljöteknik blivit alltmer omdiskuterat. För att arbetet kring miljöteknik ska kunna förankras i samhället bör de svenska företagens konkurrenskraft öka både på nationell och internationella marknader. Regionala miljöteknikcentrum har därför skapats i Sverige på senare år för att komma närmare företagen samt att kunna få lokala synergieffekter mellan företagen. I och med detta blir miljöteknik alltmer vanligt i Sverige, trots detta har relativt få studier gjorts kring begreppet och fenomenet miljöteknikcentrum.
Syftet med denna studie är att kartlägga fenomenet miljöteknikcentrum i Sverige genom att studera fyra stycken aktiva centrum. Syftet med kartläggningen är att belysa för- och nackdelar med de utvalda centrumen samt belysa deras drivkrafter. Denna kartläggning ska därefter kunna fungera som ett bra underlag vid nystartandet av ytterligare centrum samt ge lärdomar till verksamma centrum. Metod för att genomföra denna kartläggning skedde i form utav en kvalitativ intervjustudie där representanter från fyra olika centrum gav sin syn av respektive verksamhet. Resultatet från intervjustudien har sedan analyserats i en SWOT - analys.
Slutsatserna för studien visar på att centrumens verksamheter skiljer sig åt vad anbeträffar relationen till medlemsföretagen, syfte och aktiviteter. När det gäller hur centrumen valt att organisera sina verksamheter så skiljer sig även detta åt. I vår kartläggning har vi identifierat centrum i bolagsform, projekt eller som ideell förening. Centrumens framgångsfaktorer är individuellt utformade och utvärderingsformerna varierar.
Hagberg, Anna. "Provtagning och analys av totalkväve, fosfor och BOD7 på inkommande avloppsvatten till Guldfågeln AB:s reningsverk". Thesis, University of Kalmar, School of Pure and Applied Natural Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-2131.
Texto completo da fonteDet huvudsakliga syftet med detta arbete var att undersöka innehållet av totalkväve, fosfor och BOD7 på inkommande avloppsvatten till Guldfågeln AB:s reningsverk. Guldfågeln AB har ett tillstånd enligt miljöskyddslagen för verksamhet vid fjäderfäslakteri från 1999. De har ett eget reningsverk där processvattnet renas genom fällning och flockning. Därefter går avloppsvattnet vidare till Mörbylånga kommunala avloppsreningsverk (KARV) där det renas ytterligare innan det når recipienten Kalmarsund. Guldfågeln har haft problem med förhöjda värden av kväve och BOD7 i sitt avloppsvatten som når KARV.
Genom att ta prover på avloppsvattnet under ett dygn undersöktes förändringarna under processdygnet. Provtagningen utfördes med en programmerbar provtagare och delades upp på två olika processdygn. Analyserna av provtagningen visade att halterna av de undersökta parametrarna varierade under dygnet. Troligen beror detta på vilka processer som är igång och hur mycket material som når det interna reningsverket. Guldfågeln AB har justerat och genomfört åtgärder på sitt interna avloppsreningsverk.
Detta arbetes slutsats är att Guldfågelns viktigaste åtgärd utöver de redan genomförda är att försöka minimera ingående partiklar så att så lite som möjligt hamnar i avloppsvattnet.
Callstam, Christian, e Henrik Hedlund. "Praktisk framställning av biogas : konstruktion av en fungerande demonstrationsapparat". Thesis, University West, Department of Technology, Mathematics and Computer Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-891.
Texto completo da fonteSödergren, David. "Öppna spisar : metod som förhindrar öppna spisar att ryka in". Licentiate thesis, KTH, Energy Technology, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4337.
Texto completo da fonteThe primary purpose of this thesis is to account for a new method of limiting the risk of smoke leaking out from the open fireplace into the room. The improved functionality is obtained by adding a turnplate to the open fireplace mounted horizontally inside the lower edge at the hood of the open fire. The streams of smoke and air, which are cold of the contact with the cool surfaces in the stove, have a tendency to fall down along the inside of the hood and continue out into the room. The stream is stopped and redirected back up into the chimney by the turnplate. The development of the method is based on measuring of temperatures and air flows in a monitored fireplace. Tests have been carried out partially in a test fireplace in full scale and partially in a model of the test fireplace at the scale 1:2. The model fireplace is made in glass which makes it possible to study and photograph the streams of smoke inside of the fireplace and oil fog has been used for the demonstration. Temperatures on surfaces and gases in the fireplace have been measured during different periods of time. These measurements have shown that the greatest risk for backwards floating air currents occurs directly after having lit the fire and during some hour after that. It is during this time the temperatures in the fireplace will rise. Measurements and also film-recordings have therefore been concentrated to these periods of time. The heat gain from the fire has been measured in connection to the tests. The distribution of the heat through radiation and convection based on the temperature measurements is shown.
Rahman, Sunni. "Water hyacinth - Effects on sustainable Devolopment : A minor field study about water hyacinth in Lake Victoria in Kisumu, Kenya". Thesis, Mälardalen University, School of Sustainable Development of Society and Technology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-602.
Texto completo da fonteAbstract
The aim of the study was to do a minor field study in Kisumu, Kenya. My thesis in Ecological Economics C, 10p and the purpose was to explain the association between water hyacinth and sustainable development. What are the main effects on environments, ecological
and social effects in Kisumu in Kenya? This paper will address environmental, economical and social effects related to the water hyacinth. I have chosen the qualitative method because
I want to asses general impression and understand different processes and social connections. Interviews are made which aims to give a deeper focus by letting the interviewed person
describe and openly answer the questions. The study is conducted as a combination of literature reviews, qualitative interviews with parties or people who are involved and other
organisations in Kenya and from observations. The theoretical approach was Sustainable devolopment, control of social, economical and ecological perspective on regional development.
Sustainable development include social, ecological and economics, all three are depended of each other to make progress. From a social point of view the plants give people a
society and provide work and knowledge on how to recycle the weed. Economically, it is a disaster but the good opportunities come from recycling even if it contains a lot of water. Eutrofication and blocking of sunlight are the most ecological effects caused by water
hyacinth. If people are prepared to vote for honest representative no bribes will take place, these kind of statement are important and its time that people takes responsibility for their act,
mainly environmental responsibility which are important for our common future. It should be expensive to destroy the nature, on the other side you do not know the value according to
Dryzek. A suggested idea is to turn this into a tourist attraction which hopefully will become popular. To remove the weed by the biological method is the best controlled, cheapest and it
is the most sustainable method of weevil’s which eats the leaves of the plants.
Contact: Sunni Rahman
Telephone: +4670-768 52 54
E-mail: srn01001@student.mdh.se
Livros sobre o assunto "Miljöteknik"
Environmental Science in Building. Palgrave Macmillan Limited, 2018.
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