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1525 Uppsatser om Varied unsteady flow - Sida 65 av 102
Studie av belagda kolvringarmot plasmasprutat cylinderfoder : Med avseende på friktion och nötningsmotstånd
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.
De svenska fastighetsbolagens redovisningsval för förvaltningsfastigheter och dess effekter på redovisningens kvalitativa egenskaper : En studie av noterade respektive onoterade svenska fastighetsbolag efter implementeringen av internationellt regelverk
AbstractTitle: The Swedish real estate companies choices of valuation within investment properties and its further effects on the qualitative characteristics of accounting.-A study of the Swedish real estate companies listed and non - listed on the stock market, after the application of the international rule board.Background and Problem: From January 2005, all companies, listed on a stock market within the European Union, are required to prepare their consolidated accounts using common set of International Accounting Standards, IAS/IFRS. In Sweden, this opportunity has also been given to non-listed companies, to voluntary implement these rules in their consolidated accounts. One difference between Swedish accounting rules and contemporary International rules, deals with the accounting treatment of investment properties, which foremost affects the real estate market?s accounts. In contrast to the Swedish Financial Accounting Standards Council?s recommendation RR 24, the new standard, IAS 40, permits a choice between different accounting alternatives.
Att leta bänkbok: bänkbokspraktiker i skolbiblioteket.
The purpose of this Master's thesis is to contribute to a betterunderstanding of children's free time reading book practices by studyingpupils in the school library and their processes of finding and borrowingbooks for themselves to read silently in the classroom, so called free timereading books. The study also includes observations of the staff's role,particularly the school librarian's in supporting pupil's book selection.The empirical material consists of field notes from an etnographic studywhere pupils in 4th grade (aged 10-11) and staff were observed duringthree school library visits. The theoretical framework is inspired byLennart Björneborn's concepts of information practices in libraries:serendipity, integrative library interface, mediation flow and affordancespaces.The study shows that pupils' search for free time reading books in theschool library is relatively routine-based at the same time as it isspontaneous. The process is an interplay with factors such as time,display and interaction in the integrative library interface. In the presenceof adults, finding books becomes an imposed task for the pupils.
Produktion av finfibrig ull genom avel och utfodring - inkorsning av merino i sveafårsbesättningar :
To produce fine fibre wool as a complement to lamb meat production, Merino and Svea sheep are currently being crossbred in the county of Jämtland. The aim of this study was to evaluate growth and wool quality of the first crossbred lambs. In addition, a literature study about nutritional effects on wool production has been carried out.
The literature study showed that fine fibre wool should foremost be achieved through directed breeding. Nutritional requirements of the sheep at different stages of production should determine their feeding.
En studie om lärares arbete vid övergångar : Hur arbetet som bedrivs i arbetslaget återspeglas på individ, grupp och organisation
This thesis is based upon the assumption that in Swedish school today it is a wide gap regarding the information flow when pupils are switching school. This was one of the reasons Skolverket published a report clearly stating that this is the case. The purpose of this thesis is to examine and describe how teachers are working in a teacher team at transitions to see and understand what their work may mean individually, in a group and to the school as an organisation. The questions at issue is to see how the teachers cooperate during transitions and how they notice students in need of extra support and students level of knowledge during transitions. The two last questions at issue is first to see how teachers approach parent?s expectations on the school and the teachers, secondly it is to examine what implications their work will have on the school.
Provmetod för olje- och partikelöverdrag från kompressor till tryckluftssystem
Compressed air is an energy source that is widely used in today's trucks and buses.Compressor located next to the engine supplies the pneumatic system with the compressed air and is lubricated with the engine oil. Some of the oil follows the air flow in both liquid and solid phase. The solid phase, namely the carbon particles are created due to the high temperature in the compression chamber.Oil- and particles carryover softens and destroys the rubber material in the air valves and disturbs the mechanical function of various components in the pneumatic system. In order to reduce oil- and particles carryover is an Air Processing System (APS) set downstream the compressor.No method for establishment of oil- and particles carryover from the compressor exists at the moment. Therefore the filtration efficiency of APS is currently unknown.
Åtgärdsförslag och känslighetsanalys vid energieffektivisering ur ett fuktsäkert perspektiv : En fallstudie på timmerhuset Sofiedals herrgård
This thesis investigated the possibilities to resume cultivation of an old manor house built of timber and what this would mean from an energy and moisture perspective. The building in this case study is named Sofiedals mansion and was built in 1858 in Valbo 11 kilometers west of Gävle.The structure of the house was documented and used as a starting-point for carrying out calculations focused on energy and moisture aspects. With the help of a number of computer programs and a conducted air tightness test, the buildings energy consumption were calculated and compared with the current building regulations.In addition, the building was analyzed considering energy retrofitting and what it meant for moisture problems. The energy retrofitting consisted of additional insulation, decreasing the buildings permeability through air sealing; window and door replacements. When a building is equipped with natural ventilation it is difficult to know its precise performance and how an energy retrofitting affects it.
Upplevda oönskade beteenden hos katt : förekomst och orsaker till dessa
The objective was to examine the frequency of unwanted behaviors in the Swedish feline population and what factors in the environment, inheritance and past life that have an influence on the frequency. SLU?s web poll generator was used to create a web poll which insinuated that it was a poll with objective to make an inventory of the Swedish feline population. I wanted to avoid that only owners to cats with unwanted behaviors answered the poll. The web link to the poll was sent to SLUs students and posted on Internet forums for people interested in cats.
Att utvidga med stil - en studie i varumärkesutvidgning inom modebranschen
Background: Today, the trademark is the heart of the company and the management of brandimage and identity require certain attention and care. In an increasingly tough business climatewhere the brand today has a central and important role, it is understandable that the companieswant to take maximum advantage of it. In the company the brand is a great resource with analready known identity and established values that can help new products to enter the market. Toextend the brand is a popular growth strategy but it is important to do it properly in order not tofail. J Lindeberg and Peak Performance are two Swedish fashion companies which both havemade brand extensions.
En studie i lustfyllt lärande i år 5-6 om runor
Syftet med studien var att jag skulle få djupare kunskap om min egen undervisning och vad som påverkar elevers lärande, samtidigt som jag ställde mig frågorna vad som bidrar till ett lustfyllt lärande för eleverna, vad som påverkar undervisningen så att eleverna tycker det är roligt att lära sig och varför det blev mer lustfyllt och roligt att lära sig i arbetet om runor.Metoden jag använt mig av är av både kvalitativ karaktär, där jag själv har varit med som lärare i undersökningen, och kvantitativ karaktär, där ett resultat av elevernas svar har redovisats i en enkät. Undersökningen bygger på en dokumentation av ett arbetsområde om runor och en enkät utformad med 28 stycken s.k. skalfrågor.Resultatet av enkäten visar på att 91 % av eleverna var positiva till arbetet med runor vilket kunde bero på variationen i arbetssätt och metoder och att eleverna använt alla sinnen under tiden de arbetat om runor. Eleverna har arbetat både teoretiskt (55 % positiva) och praktiskt (98 % positiva) vilket visar på att eleverna har blivit tillgodosedda avseende sin individuella intelligens som Gardner (2000) menar varje människa har.Det har varit spännande och givande att studera ingående vad jag gjort och vilken effekt mitt handlande har givit. Det är inte ofta jag har tid att analysera och följa upp min undervisning på det sätt jag kunnat göra här.
Behovet av ledningsstöd för småföretag. En studie av fyra olika småföretag från fyra olika branscher, i Västra Frölunda
Introduction: Public health researchers have long been focusing on investigating health inpopulations through determinants such as income inequalities. Nevertheless, incomeinequalities can be considered an effect of the organization of welfare regimes. The publichealth status is largely affected by the organization of welfare regimes and consequently thereare large differences in health within and between welfare regimes. How are these differencesdistributed and how can they be explained?Aim: To compare health between welfare state regimes with the use of Esping-Andersen?swelfare regime typology and to investigate the relationship between welfare statedeterminants and health.Methods: A literary review based on 12 scientific articles.
Scenen är din: upplevelseproduktion som perspektiv vid kommunal rekrytering av unga medarbetare
I dagens upplevelsesamhälle sker en generationsväxling på svensk arbetsmarknad. En ny generation av unga medarbetare, som går under benämningen generation Y, ska ersätta 40-talisterna som går i pension. Arbetsgivare står inför en utmaning gällande rekrytering av dessa unga medarbetare som skiljer sig från tidigare generationer. (Fürth, 2008). De har växt upp i en tid då fokus har flyttats från materialistiska värden till emotionella sådana och där upplevelser har fått en ökad betydelse (Pine & Gilmore, 1999).
Ledarskap & management i storskalig smågrisproduktion
This study has been done in order to map the supply of vegetarian and vegan food products in Sweden for business clients and consumers. A total of 665 food stuffs were found and classified into six categories. The biggest category was meat substitutes with 302 products and the second largest category was sandwich spreads with 150 different products. Within the remaining categories a varied number of products were found; 86 beverages, 64 cooking accessories, 34 milk free ice creams and 29 plant based yogurts. Of the meat substitutes were 28 only available for business clients.
Värdepapperisering i Sverige : Finns det en marknad?
As of today, securitization is an established product on the capital market. The first transaction was made in the US in the 1970s. Since then the product has been developed and today there are several different structures of the product. Internationally securitization has been used for two reasons. Originally securitization was used to gain capital relief, but since capital requirements such as Basel II were implemented, the usage of securitization changed to more of a funding source.
Används ekonomiska planeringshjälpmedel i lantbruksföretag : beslutsunderlag med hjälp av kalkylmetoder
In agricultural educations you learn to use different economic planning tools, as basis for decision. The purpose and goal of this work has been to find out if economic planning tools are used by the farmers in Sweden. We choose to do an investigation through personal interviews, and used an inquiry to get as equivalent answers as possible from the farmers.
This work contains a literature study with relevant facts about the questions that is brought up in the inquiry. This study of literature explains shortly some different calculation methods and bases for decision. It also contains useable information that is important to know before an investment.
The questions that are asked to the farmers have focused on the use of calculation methods and economical planning tools.