A problem in the field of district heating is the oil burners needed to provide power when a peak load occurs. One possible way of reducing the needed amount of oil is to reduce the power demand for space heating in the district-heating substations when the need for district heating water exceeds a certain limit. This can be done by use of a locally working controller function.In this Thesis the options concerning load priority are evaluated. To evaluate the potential for using controller functions concerning peak load priority an Experiment was brought out in a chosen district-heating substation. The impact on the indoor thermal comfort during a heat reduction was also taken into account.

It is important to investigate the potential of biological control measures in agricul-ture, especially where economic issues restrict the use of expensive inputs or when there are environmental concerns about toxicity of agrochemicals. The bacterium Bacillus subtilis has proved promising as a biocontrol agent (BCA) in suppressing various plant diseases and it has also been shown to promote plant growth in certain cases. During this study, the effect of B. subtilis on Fusarium wilt (caused by the fungus Fusarium oxysporum) on tomatoes, as well as its effect on the earthworm species Pontoscolex corethrurus was investigated. Furthermore, the combined ef-fect of the BCA with P.

Ett Experiment genomfördes i avsikt att undersöka huruvida reducerande av detaljerad information i ansiktsbilder ökar det systematiska felet och minskar precisionen i åldersbedömningen. 20 ansiktsbilder visades dels i sitt ursprungliga utförande men också med reducerad information genomen stokastisk ersättning av bildelement med svarta sådana omfattade 30 och 60 procent av bildelementen för 60 personer mellan 14-67 års ålder av vilka 24 var kvinnor. Exponeringstiden fick väljas fritt av försökspersonerna. Experimentet visar att reduktion i detaljerad information påverkar den systematiska avvikelsen och noggrannheten i åldersbestämningen. Detta överensstämmer generellt med tidigare undersökningar..

Volvo Cars in Skövde manufacture and assemble Volvo engines. When attaching the ignition coil to all 4-cylinder engines, a special mounting tool is required. This mounting tool is currently manufactured from injection-molded polyoxymethylene (POM), a thermoplastic. It has been noted that the life span of the tool is shortened as a result of abrasive wear that occurs during the attachment process of the ignition coil.An investigation of the possibility of manufacturing the mounting tool with a 3D-printer is undertaken in cooperation with ÅF, a consultant to Volvo Cars. A literature study is first presented to introduce broader knowledge on the subject.

Sambandsanalys av surveydata kompliceras av förekomsten av slumpfel och metodeffekter i de avgivna svaren. Dessa felkällor kan leda till betydande över- eller underskattning av sambanden mellan undersökta variabler, och riskerar att leda till felaktiga slutsatser.En sedan länge känd metod för att estimera och kontrollera för slumpfel och metodeffekter i enkätdata är den så kallade Multitrait Multimethod-metoden (MTMM). Nackdelen med MTMM-metoden är att den kräver att varje fråga som ska analyseras ställs minst tre gånger i samma enkät, vilket gör att ansatsen i praktiken oftast inte är möjlig att tillämpa. Sedan 2012 finns dock ett verktyg, SQP 2.0, som gör det möjligt att skatta slumpfel och metodeffekter i enkätdata utan att genomföra MTMM-Experiment. Den här uppsatsen utvärderar prediktionerna från SQP 2.0 på en enkät om arbetslivsrelaterade frågor besvarad av svenska och brittiska respondenter.

Syftet med denna studie var att undersöka hur tvåspråkiga elevers kommunikation under två olika laborationer såg ut, hur laborationsuppgiftens utformning påverkade dessa elevers kommunikation och även hur laborationerna kunde ge eleverna möjlighet till reflektion runt innehållet. Elever i årskurs 7 observerades och spelades in på band vid två skilda laborationstillfällen. Intervjuer utfördes efter det sista laborationstillfället. Undersökningen tyder på att elevernas kommunikation och möjligheter till reflektion i stor utsträckning påverkas av laborationens utformning och innehåll..

The cattle production in the world has been questioned in Sweden due to its negative impacts on the environment. The use of imported soya bean meal as a protein feed for Swedish cattle results in the cutting of rainforest and an extensive use of pesticides in the countries were the soya beans are produced. As a consequence, the environmental impacts caused by cattle production increases. A production of protein feeds in Sweden would decrease the transportations and the cutting of rainforest. For organic beef producers the possibility to produce home-grown protein feeds is important since organic protein feeds can be difficult to obtain in another way.

This work focuses on the relation between human and animals and especially on the relation between horses and human. I have brought up the human och horse relationsship, today, and in history and wrote about the behaviour of the horse. Some older studies with human and animal interaction, including animals like dog and cattle are discussed. I have also discussed physiological parameters that might influence the bond and the interaction between human and horse and some critical aspects concerning the methodology when studying this kind of physiology. The purpose of the Experimental study was to analyze if common management routines and grooming of horses increases horses interest in making contact with humans. Many horse owners feel that they have a good connection with their horse and factors that can influence the relationsship could be physical contact, feeding or some challange that make the horse trust the human.

Milk fat is an important feature in many different milk products and other foodstuffs and it is often crucial for the dairy plants that the milk fat is stable for different manufacturing processes. Lipolysis is the enzymatic degradation of fat and is the one of the causes for an elevated amount of free fatty acids (FFA) in milk. Further, the change in fatty acid (FA) composition in milk can affect the stability of the product and also the manufacturing process. Both internal and external factors, at farm level or at the dairy plants can affect both FA composition and content of FFA. Milking frequency (MF=number of milkings per cow and day) and the composition of feed are two examples of factors generally performed at farm level. The objective of the present study was to evaluate how FA composition of milk and amount of FFA are influenced by two different ingredients supplemented to concentrate.

Chinas government has a multifunctional program for a more sustainable forestry since 2000. This six key forest programs goal is to develop a more sustainable forest sector but also take environment consideration. The state forest administration in China has decided to create 5.8 million hectare of fast growing and high yield forest. Eucalyptus has showed to have good properties for pulp and timber production and therefore Eucalyptus plantations are under development in costal areas in southern China. By adding extra nutrients, growth can be enhanced in Eucalyptus plantations.

This study is based on an earlier interdisciplinary study made by Redbo et al., (2000), Extensive cattle production systems ? out wintering, which lasted over two winters, 97/98 and 98/99, with two groups of heifers indoors and two groups of heifers outdoors raised in different environments, indoors or outdoors during their second winter. Both indoor and outdoor heifer groups were fed grass silage ad libitum throughout the Experimental period that lasted from October until May. The objective of this study was to evaluate the long term effects of being raised in these two environments. This study includes data collected during the period lasting from the start of the Experiment of Redbo et al., (2000) until the heifers had calved a second time and the results mainly deal with the performance of the animals after the Experiment during their first two calvings and their first lactation.

Deicing fluids based on Propylene glycol are used at Stockholm Arlanda airport to remove or prevent ice on aircrafts. The high oxygen demand of propylene glycol can cause oxygen depletion in rivers downstream from the airport if not collected. Mass balance calculations made by Swedavia indicate that the actual amount of gathered propylene glycol is underestimated. Suspicions that propylene glycol is degraded in the stormwatersystem designed to collect deicingfluids, called the B-glycolsystem, have to be investigated in order to establish with certainty that no propylene glycol in other ways leaves the B-glycol system.The purpose of this study was to determine if degradation of propylene glycol is present in the B-glycol system and also to estimate the extent of the degradation. Propylene glycols high biological oxygen demand can cause oxygen depletion in waters downstream from Stockholm Arlanda airport if not collected.

Lögner är vanliga mellan människor och förekommer i olika kommunikationsmedel. Det är av intresse att få kunskap om lögner bland annat inom budgivning på fastigheter, sjukanmälan och otrohet. I detta examensarbete undersöks Experimentellt förekomsten av planerade lögner vid kommunikation ansikte mot ansikte, telefonsamtal och textmeddelande med mobiltelefon (SMS) vid förutsättning att lögnen är planerad och för båda personernas vinning. Tre hypoteser grundade på tre teorier om lögn ställdes. Varje hypotes angav en unik frekvensfördelning av val av kommunikationsmedel.

Kontext. Det blir allt vanligare att konsumenter vill anva?nda spel och applikationer pa? alla mo?jliga enheter och plattformar och ett sa?tt att go?ra det mo?jligt a?r genom portning. Portning anva?nds fo?r att a?teranva?nda kod, objekt och funktioner utan att beho?va go?ra om allt fra?n bo?rjan.

Det ha?r examensarbetet kretsar kring mina Experiment med parkettla?ggningstekniker, och mina fo?rso?k att bygga en mo?bel som ser ut som att den har tagits o?ver av ett mo?nster eller en struktur. En o?verga?ng till na?gonting mer skulpturalt. Jag anva?nder tra?bitar som blivit o?ver fra?n andra projekt fo?r att tillverka dessa dekorationer.