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2149 Uppsatser om Ecological construction - Sida 63 av 144
Prefabricerade ramper i stålfiberbetong
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.
Riskbedömning och riskhantering i samband med vägbyggen
The aim with this thesis is to investigate the risk management at the department Road construction, The National Road Administration Region Mälardalen. The aim is also to study how the risk management could be improved to better support the project leaders. Included in theses aims is to examine potential problems with the current risk management and to suggest changes. It is of utter importance to define the concept of risk, to study how risk can be measured and in which ways risk can be analyzed. In doing so, a literary study has be done and fourteen respondents has been interviewed.Risk is to be seen more as a concept than a quantity.
"Det gäller att underlätta" : en kvalitativ studie om hur grundskolelärare i årskurs 1 ser på sin egen roll vid elevers övergången från förskoleklass till grundskoleklass
Children at the age of six, has since 1991 been allowed to start their tuition in the Swedish school system. Studies reveal that; the first school year (preschool) can be a stressful task dueto the new environment, new friendships and higher expectations.The purpose of this study is to describe and analyze how the teachers perceive their own role in the transitioning process from preschool to school. This purpose required a method of qualitative complexion and therefore qualitative interviews were used. The material is based on four interviews with four different teachers. The teachers were asked the same question considering; the transition from preschool to school from a pupil point of view, their own role in that transition and their opinions on different educational tools.
Klimatekonomins lyxproblem? Diskursiv kamp kring försäljning av överskott på utsläppsrätter
Föreliggande studie tillämpar diskursanalys i syfte att förstå var det råder samstämmighet eller konflikt kring huruvida Sverige ska sälja, spara eller annullera överskottet på utsläppsrätter inom EU:s och FN:s utsläppshandel. Genom kritisk diskursanalys har vi kategoriserat och kodat tio riksdagsdebatter mellan åren 2010 och 2014, i vilka en ekologisk diskurs och en ekonomisk diskurs kämpar om tolkningsföreträde. Bortsett från samstämmigheten att handel med utsläppsrätter ? vilken kan ses som ekologisk modernisering ? är ett viktigt verktyg för att minska klimatförändringar; råder öppen kamp kring hur ett överskott på utsläppsrätter ska hanteras. Kampen har delats in i sju kategorier baserat på huruvida: 1) ett beslut om annullering kan tas direkt eller om det krävs en utredning först, 2) en annullering är en symbolisk handling eller styrs av marknadens logik, 3) en försäljning leder till ökade utsläpp, 4) på vilket sätt överskottet ska fungera som förhandlingsstrategi under klimatmöten, 5) Sverige förlorar sitt klimatanseende vid en försäljning av överskott på utsläppsrätter, 6) utsläppshandeln i högre grad borde styras av politiker eller marknadsmekanismer, och slutligen 7) huruvida överskott på utsläppsrätter bör ses som ett lyxproblem.
Grafisk profilering med praktisk tillämpning på IUC Dalarna
This degree project is a study of graphics profiling with a practical application on IUC Dalarna.The competition between companies is getting harder and harder. Competing goods and services hasa tendency to be more and more equal to each other in respect of quality and value. The customer choosesthe Company with a high reputation and confidence. This is one of the reasons why a companyshould strengthen their company profile. The graphic profile is an important part of the company profileand it gives positive signals to the company spirit and customers.The degree project contains a guide to graphics profiling.
Automatisk trimning av drivsystemreglering från MATLAB
This master thesis covers the development of an automatic tuning process for the existing speed controller for drive systems. The drive systems are resonant two-mass systems where a motor is used to drive a load connected by a shaft. The developed method relies heavily on system identification and the construction of a complete mechanical model of the process. With this approach, the common problem with poor load speed control that derives from measuring only the motor speed can be addressed and solved for a majority of such processes.The automatic tuning method has along with general test functions been implemented in a complete tool for automatic tuning, testing and performance evaluation and reporting for drive systems..
Bjälklag i FRP-material
Syftet med detta examensarbete är att vidareutveckla glasfiberbalkar så de kan användas som mellanbjälklag i småhus. Förebilden var ett ?Delta Deck? som utvecklats av Altakor Group och används i brokonstruktioner. Denna profil har vi sedan modifierat och optimerat för bruk i småhus. Den största skillnaden är att vi valt att inte använda den så kallade ?snap-fit?-tekniken.
Muramaris anläggningshistoria 1915-24 :
Gardens from the first decades of the 20th century are often described as seen from a sublime ownership perspective. It may be artists, authors or some other intellectuals, they are all attributed as creators of the referred estate. As far as practically oriented gardeners, constructors or garden consultants are mentioned, they are consequently seen as the mere instruments for carrying out the intentions of the actual owners. Referring to those circumstances it is however well worth notifying that all properties, and in particular the gardens belonging to it, are submitted to a constant change. For anyone acquainted with garden work, it is quite obvious that the gardens vitality is closely related to the ongoing design process, by which form and content are created and re-created.
Att övervinna barriärer för kunskapsåterföring - En fallstudie av NCC
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.
Utveckling av en metod för avvikelsehantering i byggföretag
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.
Framtidens byggarbetsplats. Organisation och Kompetens
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.
Stålfiberarmerad betong - En ekonomisk jämförelse
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.
Nya inslag i bostadspolitiken konsekvenser för Helsingborg
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.
Expander : En studie av Expanders kommunikation och varumärke
Communication can be heard in many different ways and it is important for all businesses, especially in B2B. The construction and maintenance of a brand plays just like the communication a very important part. These parts also have a lot to common and affect each other in a large extent. One problem that may occur in many companies is the failure to grow and gain a larger share of the market even if they in various ways are trying. Expander is one of those companies and in this research report we studied communication and brand building, focusing on brand management, relationships and integrated marketing. Here we drew the conclusion that all these areas are important for a company, especially in the Business-to-Business marketing in different ways.
Den trygga förskolan : En enkätundersökning om föräldrars och pedagogers förväntnignar på förskolan
The Swedish early childhood system is considered among the best in the world, however, in spite of this, we feel that there exists a conflict between educators? and parents? expectations of ?a good preschool?. During our teacher education training we have observed many different preschools and almost in all of them we have listened to anecdotes about one or more conflicts arising between educators and parents and which we have been able to pinpoint toward differing expectations. After talking with a preschool director, who also perceives that expectations of the preschool aims sometimes differ, our idea brought us to conduct this investigation.In this study, we have investigated parents? expectations of preschool and compared them with educators? expectations.