This report is a study in voltagelevel in connection with regeneration of brake energy from the tramtype M31 in Gothenburg.In the act of braking, the tram M31 uses electrical braking where the electrical motors generates energy and if possible send it back to the overheadline, where other trams in the nearby can use this regenerated energy for its own driving force. In cases where no other energyconsumers are located in the same section, there is a resistance witch task is to convert this energy into heat. The regulation of this resistance appears to cause an increase in the voltagelevel into far too high levels.Investigations of the trams regulationequipment and its construction have been done. Further have measurements on the overheadline been performed in order to map the voltagevariations during a longer period of time.The result have been showing that the voltagelevel during regeneration often is as high as 880V-920V, more extreme values have not been observed in a large scale. The values are especially high compared to the nominal voltagelevel.

This report is a study in voltagelevel in connection with regeneration of brake energy from the tramtype M31 in Gothenburg.In the act of braking, the tram M31 uses electrical braking where the electrical motors generates energy and if possible send it back to the overheadline, where other trams in the nearby can use this regenerated energy for its own driving force. In cases where no other energyconsumers are located in the same section, there is a resistance witch task is to convert this energy into heat. The regulation of this resistance appears to cause an increase in the voltagelevel into far too high levels.Investigations of the trams regulationequipment and its construction have been done. Further have measurements on the overheadline been performed in order to map the voltagevariations during a longer period of time.The result have been showing that the voltagelevel during regeneration often is as high as 880V-920V, more extreme values have not been observed in a large scale. The values are especially high compared to the nominal voltagelevel.

This report is a study in voltagelevel in connection with regeneration of brake energy from the tramtype M31 in Gothenburg.In the act of braking, the tram M31 uses electrical braking where the electrical motors generates energy and if possible send it back to the overheadline, where other trams in the nearby can use this regenerated energy for its own driving force. In cases where no other energyconsumers are located in the same section, there is a resistance witch task is to convert this energy into heat. The regulation of this resistance appears to cause an increase in the voltagelevel into far too high levels.Investigations of the trams regulationequipment and its construction have been done. Further have measurements on the overheadline been performed in order to map the voltagevariations during a longer period of time.The result have been showing that the voltagelevel during regeneration often is as high as 880V-920V, more extreme values have not been observed in a large scale. The values are especially high compared to the nominal voltagelevel.

Gastric ulcer is a common disease among pigs in the whole world where an intensiveproduction occurs. It is mainly the upper region, the nonglandular region of the stomach thatis affected. Gastric ulceration is a disease with several risk factors. The factor that seems tohave the largest impact on the development of gastric ulceration is a small particle size of thefeed. The reported prevalence of gastric ulceration differs from 5 to 100 % and it is a largeherd-to-herd Variation.

En stor del av de svenska byggnaderna uppfyller inte de krav som ställs för taksäkerhet, och saknar taksäkerhetsanordningar. Detta beror på att de taksäkerhetsanordningar som finns på marknaden idag inte tilltalar kunden tillräckligt estetiskt. Dessutom finns en stor variation av taktyper, detta har medfört att det utvecklats många olika infästningar för taksäkerhetsprodukter. Målet är att utveckla taksäkerhetsanordningar som kunden anser vara estetiskt tilltalande samt konstruera en infästning som fungerar för alla typer av tak och alla taksäkerhetsprodukter. Resultat: Flera koncept togs fram med fokus på design och tillverkning, där till slut ett slutkoncept valdes för infästning, snörasskydd och nockräcke samt två koncept för stegar.

Sigill Quality Systems has been certifying beef since the autumn of 2006 using the brand name label Swedish Sigill. IP Sigill (the certifying system for integrated production) encompasses the values: animal ethics, food safety, free range and environmental concerns. Product quality is not yet one of these values, and there is a variation in the quality of Swedish beef. Swedish Sigill wanted to investigate the factors that influence product quality, review which of the present regulations that have an influence on product quality and formulate new regulations with the purpose of enhancing the product quality (sensorial, technological and nutritional quality). A survey of quality parameters and factors that influence product quality was done in order to establish a scientific foundation to work from.

In this study, the pre-tension force in an insert screw connection are examined in order to establish a greater understanding of the system and to facilitate the process of making new metal cutting tools. Certain especially significant design variables such as the offset, the length of the contact thread and the shank length above the threaded hole, are selected to be closely examined. A comparison of the influence on the pre-tension force between threaded holes made with a worn, versus new, threading tool is also involved in the experiment. The study is limited to handling the screw sizes M2,5 and M3,5. The results show that a regression model, with good approximation, can be fitted to the measured values.

Detta arbete omfattar en studie angående ett blivande kompetensutvecklingscenter för urbefolkningen på ön Mindoro i Filippinerna. En central punkt på centret är ett rum avsätt för varierande verksamheter. Min studie omfattar hur detta rum på bästa sätt kan bidra till flexibilitet och användbarhet genom rumsliga element. En fallstudie utfördes i Filippinerna under perioden mars-maj 2012. En kvalitativ studie innefattande intervjuer, observationer, diskussioner, analyser och litteraturstudie, med fokus på visioner, hinder och förutsättningar. Analys av studien och designprocessen resulterade i ett gestaltningsförslag som skapar förutsättningar för inkludering och funktionalitet. Resultatet blev en stapelbar låda som går att använda som sittplats, en plats till förvaring, samt går att sätta ihop till önskade moduler.

This report is a study in voltagelevel in connection with regeneration of brake energy from the tramtype M31 in Gothenburg.In the act of braking, the tram M31 uses electrical braking where the electrical motors generates energy and if possible send it back to the overheadline, where other trams in the nearby can use this regenerated energy for its own driving force. In cases where no other energyconsumers are located in the same section, there is a resistance witch task is to convert this energy into heat. The regulation of this resistance appears to cause an increase in the voltagelevel into far too high levels.Investigations of the trams regulationequipment and its construction have been done. Further have measurements on the overheadline been performed in order to map the voltagevariations during a longer period of time.The result have been showing that the voltagelevel during regeneration often is as high as 880V-920V, more extreme values have not been observed in a large scale. The values are especially high compared to the nominal voltagelevel.

The aim of this thesis is to examine how the history of mathematics can be used in teaching and whether pupils? attitudes to mathematics can be affected by this. In order to do this a school project about the history of mathematics is planned, implemented and analysed.The following questions are addressed:? Why use the history of mathematics in teaching?? How can the history of mathematics be used in teaching?? Can a historical perspective in teaching affect pupils? views on mathematics?The school curriculum emphasizes the importance of history in teaching. Literature, scientific articles and government inquiries call attention to the positive effects of including a historical perspective in teaching.The school project, which underlies this thesis, is put to practice by 25 pupils in a mathematics science profile class.

Studien behandlar projektledares uppfattningar av lärande i projektarbete. Valet av yrkesgrupp projektledare, beror på att projektledare ofta tilldelas nya projekt vilka de snabbt är tvungna att sätta sig in i. För att ett projekt ska fungera och lärande ska uppstå är det ett måste att alla deltagare har goda relationer och ett bra samspel. Syftet med studien är att nå en ökad förståelse av projektledares uppfattningar av lärande inom projektarbete. Fenomenografiska ansatsen valdes då variation är viktigt för att fånga så olika uppfattningar som möjligt.

Weaning is one of the most critical events in the piglet production with problems such as growth check and post-weaning diarrhea as a result. The lighter the piglets are when the growth check occurs, the harder they have to get back to normal growth rate. Creep feeding of piglets is used to reduce the problems by increasing the weaning weight and adapting the digestive tract to a starter diet. Hodge (1974) showed that the sow?s milk can not provide enough nutrients for maximal growth rate.

Vår undersökning visar att den lokala arbetsplanen inte har någon nämnvärd betydelse för pedagogerna i deras dagliga arbete. Två av fem intervjuade pedagoger kände inte till begreppet lokala arbetsplan från deras skola. Vi såg en stor variation mellan de olika arbetsplanerna, både när det gäller beteckning, innehåll och funktion. Arbetsplanerna användes inte som ett självvärderande utvecklingsinstrument vilket var en av dess ursprungliga målsättningar. Vår undersökning visade även att förutsättningarna för pedagogerna att diskutera, reflektera och analysera kring målen är begränsade.

Arbetets titel är Pedagogers syn på normer och normbrytande beteende i förskolan. Vi har undersökt hur man ser på normer och normbrytande beteende i förskolan. Frågorna är; Hur ser pedagoger kring normer och normbrytande beteende i förskolan? Vilken variation finns i synen på normer och normbrytande beteende i förskolan? Vi har valt att göra intervjuer med förskollärare och barnskötare. Syftet med undersökningen är att fördjupa oss i normer och normbrytande beteende.

This report is a study in voltagelevel in connection with regeneration of brake energy from the tramtype M31 in Gothenburg.In the act of braking, the tram M31 uses electrical braking where the electrical motors generates energy and if possible send it back to the overheadline, where other trams in the nearby can use this regenerated energy for its own driving force. In cases where no other energyconsumers are located in the same section, there is a resistance witch task is to convert this energy into heat. The regulation of this resistance appears to cause an increase in the voltagelevel into far too high levels.Investigations of the trams regulationequipment and its construction have been done. Further have measurements on the overheadline been performed in order to map the voltagevariations during a longer period of time.The result have been showing that the voltagelevel during regeneration often is as high as 880V-920V, more extreme values have not been observed in a large scale. The values are especially high compared to the nominal voltagelevel.