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4952 Uppsatser om High temperature electronics - Sida 40 av 331
Tillämpning av lättrörliga systemutvecklingsmetoder - en studie av systemutvecklingsprocessen i en ad hoc-krati
Due to fast growing and rapid changes in markets today, most of the organizationsthat are trying keep up with these changes have a high demand for software that areof high quality and comes with a low price. To meet these goals software companieshave to implement new methods to develop software that are suited for rapidchanges. The concept of agile methods can fulfill this need. Our purpose with thisthesis was to investigate how well agile methods could be applied in organizationsthat could be identified as adhocracies. A case study was conducted in anorganization which we could identify as an adhocracy.
Methane emission from nitrate-treated tannin rich feed for cattle in Vietnam
In developing countries such as Vietnam the population consumes more animal products for example milk and meat than before which requires greater livestock production. Ruminants contributes to more methane emission which creates a dilemma between food production and its environmental impact. By feeding ruminants with nutritive crops which humans can not assimilate the animal performance will increase in terms of better growth and milk production without inpinging on food that can be consumed directly by humans. Increasing animal performance reduces methane emission in terms of amount of methane in kg-1 milk and meat which today is much greater in developing countries than developed countries. The aim of the study was to investigate tropical tannin-rich legumes for their potential as a feed supplement for ruminants made in vitro.
Tail posture and motion as a possible indicator of emotional state in pigs
In the current study, the aim was to investigate whether tail posture and motion can be an indicator of the emotional state of pigs and if the tail posture of the pig is affected by social breeding value (SBV), coping style and/or housing. Emotional state can be defined in two dimensions: valence and arousal. Two batches of 96 finishing pigs were studied in a one generation selection experiment with a 2x2 set up and were housed in a barren or straw bedded pen. In each pen, 6 pigs (3 male, 3 female) were housed. A back-test was done to determine the coping style of the pigs with two categories; high resister and low resister pigs.
Kollektivtrafikanalys av Frihamnen Göteborg. En studie av olika utbyggnadsscenarier och dess transportbehov vid en färdig utbyggnad av Frihamnen år 2040
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.
En laptop till varje elev : en studie om gymnasieskolans satsning på datorer i undervisningen
The aim of this study is to highlight the computer as a learning resource in the education and give us knowledge about how the students uses the computer in year one in a selected High School where one computer per student were introduced in autumn 2011. The aim is also to contribute to the discussion about how the computer can become a natural learning resource for all students in all subjects, including the students in need of special support.How are the High School students using the computer?Are there differences in computer use, whether the student is in academic or vocational program?Are there differences in computer use between boys and girls?Do the student experience that the digital competence is increasing together with if they experience the computer as aid?In what degree do the teachers encourage the students to use the computer?How much do the students use the computer to learn mathematic?The study is based on a survey of all students in year one in a municipal High School.The result of the study is showing that the students first of all use the computer to play music, surf the Internet and to be logged in on social media (eg. Facebook). The students have learned to use the computer for the tasks they need, although the teachers don?t encourage the students to use the computer in any higher means, not in mathematics and not in other subjects.
Arbetsberedningar i syfte att öka delaktighet och tillvaratagande av kompetens bland yrkesarbetare -Utvärdering av ett nytt arbetssätt för Skanska Region Hus Göteborg
The use of Power Line Communication, PLC, as a communication solution for Automated Meter Reading, AMR, is popular by utilities in Sweden and other parts of the world due to demands of accurate and fast meter reading. However the use of the electrical grid as a communication medium is complex and sometimes problematic. This report handles some of the issues and problems that are important to understand when using the grid as a communications medium. Focus is mainly on investigating high frequency distortion in the Kristianstad power grid own by C4energi caused by a frequency converter. Measurements on site are done to investigate signal damping in the grid, different configurations for the frequency converter and signal strength of the PLC-system.
The effect of additional nitrate and sulfur in the diet on the methane production in cattle
A growing population together with a change in food habits to a more diverse diet containing more animal products such as meat and milk makes the possibility to produce and sell products of cattle a growing market. And at the same time there is an ongoing debate about global warming, where raising cattle is questioned due to their high production of enteric methane. To be able to raise animals in a more environmental friendly way and at the same time improve productivity in a developing country such as Vietnam would be favorable. The use of feed additives with high electron affinity could decrease the methane production and at the same time improve the gross energy digested. Nitrate and Sulfur are both good electron acceptors, but due to its toxic effects the use of nitrate in feed has been neglected.
Störningsindikation på lågspänningsnät
Föreliggande rapport är avsedd som ett examensarbete i elektroteknik (20p).Syftet med arbetet är att skapa en applikation för att finna störningar pålågspänningsnätet upp till 95kHz. Bakgrunden till arbetet kommer frånenergibolagen som vill kunna skicka datainformation direkt pålågspänningsnätet, detta vill de kunna göra med hastigheter mellan 2k ? 5kHz. Beroende på med vilken hastighet man vill skicka information kan störningar mellan givna frekvenser hindra datatransmissionen, därför är detviktigt att hitta vid vilka frekvenser störningarna uppstår så att lämpligaåtgärder kan vidtas.Grundläggande delar i applikationen är ett oscilloskop för mätning, dator medGPIB- kort för upptagning av data och LabView programvara för hantering avdata. För frekvensanalys kommer Fast Fourier Transform, FFT, att användas,varvid en grundläggande beskrivning kommer att medfölja..
Dogs on the move : a study of the travel habits of Swedish dogs and their owners? awareness of infectious diseases.
ABSTRACTThe principal aim of the study was to compare the feeding behaviour of cattle, sheep and goats on pasture and explain any differences between speices. Furthermore, I compared foraging behaviour between dry season and the beginning of the rainy season, in order to see any relationships between weather and behaviour.The study was carried out in Shompole in southern Kenya. Behavioural data were collected by observing herds of cattle, sheep and goats on pasture. The livestock were herded on pasture during the days and kept in bomas, where people live, during the nights. The weather in Shompole is characterized by high ambient temperature and low, bimodal rainfall.
Spinnarfjärilens doft : En narratologisk läsning av Gabrielle Wittkops roman Le Nécrophile
The present BA thesis is an analysis and a close reading of the French author Gabrielle Wittkop's novel Le Nécrophile (1972). The analysis consists of two parts. The first part focuses on the story and can be described as an attempt to interpret the engine of the history. The second part of the analysis focuses on the narrative; how the story is told. Le Nécrophiles main motif is re-encoding the representation of death in art and literature, traditionally conceived as a beautiful female corpse.
Investering i tidig läkemedelsutveckling. En studie om hur man tar beslut under osäkerhet.
This case study aims to explore how decision making is performed under circumstances characterised by high uncertainty. We have identified and interviewed two types of organisations dealing with investments in pharmaceutical drug development, a business characterised by high uncertainty. We have found that the two types of organisations we have interviewed display different decision making behaviour evaluating the same type of investment. Further we have explained these differences in decision making behaviour by using relevant decision making theories. This study has showed that different forms of decision making are appropriate depending on the conditions facing the decision maker..
En kvalitativ undersökning om mobbning : En studie om skillnader och likheter mellan organisationen Friends och skolans arbetsmetod att motverka mobbning
This qualitative study is about the differences and similarities between the organization Friends and schools? methods to prevent bullying. Aggression, bullying and discomfort in schools result in that many students do not dare to go to school because of their fear that they might get attacked and become systematically bullied. Bullying is a universal and persistent problem. In this study the reader will receive a better understanding and get an insight into the problems that teachers and students experience and struggle with every day in dealing with bullying in schools.
Vitrification in sealed containers : Evaluation of a new technique (Rapid-i?) for cleavage stage embryos and blastocysts
Ovarian stimulation in assisted reproduction often leads to the production of a high number of oocytes. After fertilization of these oocytes, the resulting embryos can be cryopreserved for later use. Vitrification is a recently introduced method for cryostoring embryos, showing high survival rates for both cleavage stage embryos and blastocysts. Characteristic of vitrification are high concentrations of cryoprotectants and ultra fast freezing which makes the material glassily. A major concern with vitrification has been the direct contact of the cryo-solutions with liquid nitrogen.
?Det kändes mer som dansen, eller konfirmationen? : En studie om gymnasieelevers upplevelse av modersmålsundervisning
In this study I?ve examined bilingual high-school students? experiences of their education held in their native language. The purpose of this study is to examine bilingual high-school students? experiences of how their school organizes the education that?s held in their native language, and how the students feel that the education in their native language has helped their overall language development and also in terms of learning in general. To complete this study I?ve interviewed six high school students and analyzed their answers using other studies and theories on this subject.
Kraftspelsanalys av transportstag : Prefabricerade väggelement i betong
A titania-supported nickel catalyst was prepared and tested in methanation in order to evaluate its catalytic properties (activity, selectivity and specially, activity loss), and compare it with an alumina-supported nickel catalyst.The titania-supported catalyst did not only show higher stability than alumina, but also presented a different cause of deactivation, carbon formation. In addition, a kinetic model was obtained for the titania-supported catalyst, and a study of the effect of different operating conditions (temperature, composition and partial pressures of synthesis gas and water) on the deactivation rate and carbon formation of this catalyst was performed.