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852 Uppsatser om Laboratory animals - Sida 30 av 57
Är vi lika dem? : en kraniestudie av hominider ur ett evolutionistiskt perspektiv
By examine plastic craniums from eight different hominids I wanted to find morfological characteristics that agreed with those of modern humans. The species that were selected had a plastic casting of its cranium in the laboratory at Gotland University. My focus was on species from the family Australopithecius and Homo and only working with their craniums. And this because the cranium and the theeth shows the most visible morfological characteristics between the different hominids. I also wanted,in a small part of the essay, to write about the differences in now living primates and humans skulls.Except from analysing the plastic castings I also studied surveys written by other scientist on the same subject.
Övergången från natur till kultur
Göbekli Tepe is an 11000 year old religious center where Totem has been exercised. It was raised by megalithic hunters and collectors that still during the construction lived in small-scaled mobile groups in order to find food and therefore should not have had time to raised costly stone monuments. The religious center consists of four enclosures with two T-pillars decorated with pictures of different animals and birds. Any dwellings have not been found. The place has been constructed by a well-organized elitist organization that has been capable of raising constructions in order to exercise their religion in a way we did not thought was possible such a long time ago. Analysis and findings from the near east existing from this time shows however that social changes happen in the communities around the region. Can archeological finding from the excavations on the religious center give any answer or clue regarding how man came to develop from hunter and collector to farmer? Do the findings reveal that the religion has changed Mans way to think and organize so that she was prepared to introduce the agriculture that occurs? The aim of thesis is to clarify whether Göbekli Tepe has played any role in the complex origin of agriculture..
Utvärdering av laddningskoncept för lastbilsbatterier
When drivers overnight in the truck lots of electric energy is consumed by heaters, fans, lights and other extra equipment. If the engine is not running, this energy is taken from the lead/acid batteries of the truck which then needs to be recharged during operating hours. The fact that the charge acceptance of the lead/acid batteries is dependent on the temperature makes it hard to fully recharge the batteries at lower temperatures. A negative charge balance can lead to starting problems within a few days use in cold climate.In this thesis work, the effects of different battery charging concept are evaluated on the most common Scania battery (175Ah). A battery model is implemented in Matlab and some simulations of charging are made.
En inventering av hälsoläget hos amerikansk bison (Bison bison bison) : i svenska besättningar
American bison (Bison bison bison) is a new species in Sweden and was
introduced in the year 2000. In this study the result of an interview and a field
investigation is presented. The aim was to investigate the health and parasite
status in Swedish bison herds. The most common reason to begin with bison
breeding was meat production and/or sale of breeding animals and tourism. The
Swedish breeder?s experience of bison is that they in general are healthy.
Optimalt mottagningsstall för kalvar : en fältstudie
A cattle producer that buys calves that are younger than six months to the herd should have a starter stable to prevent infection spreading in the herd. According to the Swedish animal welfare regulation there has to be a starter stable if more than 50 calves that are younger than four months are bought in yearly to the herd. The aim of the study was to improve the knowledge about bovine buildings and management of starter stables to obtain optimal weight gain and health of the calves. The hypothesis 1) The younger the calves are when purchased, the higher the calf mortality and 2) Purchasing calves from a high number of herds involves a higher risk of calf health problems and calf mortality were tested in the study. The objective of the study was to give advices by way of presenting ideal solutions of how a starter stable should be constructed and managed.
A field study was done during June to September 2008 to collect knowledge and experience from existing starter stables.
Opioder som smärtlindring till häst
Opioids are considered the "golden standard" in pain management for both humans and small animals, but is used less often in equine medicine - probably for fear of side effects. Are there any studies that suggest that side effects are a major problem, or is it lack of experience which is the greatest obstacle to use? As early as 1937 it was shown that morphine and morphine derivatives provide analgesia in horses. For species other than horses used opioids often both pre-, intra-and postoperatively. They relieve pain effectively and are often included in the anesthesia protocol.
Industriforskning och informationssökning: en användarstudie av en grupp forskare vid ABB Corporate Research
The thesis aims at, from a user perspective, examining how a group of industrial researchers understand the information seeking in their every day work. A qualitative method is employed. The empirical material consists of open-ended interviews with in all ten researchers. All of them work at the Swiss-Swedish Technology Company ABB's research laboratory in Västerås. The thesis is based on the opinion that the scientific knowledge production has become commercialised and that the scientific communication is going through certain changes.
Gotland ponies on extensive pastures ? a welfare assessment
Swedish farmers have the possibility to be subsidized by EU rural development programme for grazing animals on pastures to promote the biodiversity of flora and fauna. The environmental remedy sometimes does not allow supplementary feed and at the same time the Swedish Animal Welfare Act and the Swedish Agricultural Board?s regulations for animal welfare and protection states that animals, in this case horses, shall be fed with food of good quality and adapted for the species. The regulations also state that they should have an individual feeding regime that enables them to maintain a normal body condition.
The aim with this master thesis has been to investigate if it is possible to keep Gotland ponies on extensive pastures, during late spring and summer and still maintain animal welfare. The horses were assessed every fourth week using a welfare assessment protocol developed in line with the Welfare Quality® project (submitted, Viksten et al) where physical, behavioural and resourcebased parameters were observed.
Twelve one-year old stallions of the breed Gotland ponies purchased from different breeders were used in the study.
Matematiksvårigheter : Värför och vad kan vi göra
During my practical training period I observed that many of the students have a negative attitude against mathematics. I also observed that these students have a difficulty reaching the goals in the subject. In my opinion there are different factors that can be the reason to why these students experiences mathematics as a difficult subject in school. This is the reason why I wanted to find out which factors that lies behind the difficulties and how the pedagogues work to support these students. It is also significant that every single student get their rights to develop a positive attitude against mathematics and that the pedagogue supports the students in their development.The point with this degree project is to find out, with the help of three pedagogues, which factors that could lead to difficulties in mathematics with students.
Antikroppsstatus mot kattpest hos lejonen i Kolmårdens Djurpark :
The lions at Kolmårdens zoo are vaccinated against Feline Panleukopenivirus
(FPV). In 1994 there was an outbreak among the lions at the zoo of FPV disease.
A retrospective study has been made to measure the antibodytiters in vaccinated
lions and lions that lived during the outbreak. An ImmunoPeroxidase Monolayer
Assay (IPMA) was used to analyze the titers in the sera from the lions.
Lions were divided into five groups. Group 1, 2 and 3 contained lions vaccinated
one, two and three times respectively (a total of 40 animals). The lions of Group 4
were born in 2004 (six lioncubs) and were vaccinated according to different
regimes and the changes in antibodytiters were followed as respose to vaccination
during the spring 2005.
Praktiska effekter av begreppsförvirring för en databas konceptuella design : En fallstudie om databas- och begreppsmodellering
Company X develops a laboratory information system (LIS) called System Y. The informationsystem has a two-tier database architecture consisting of a production database and a historicaldatabase. A database constitutes the backbone of a IS, which makes the design of the databasevery important. A poorly designed database can cause major problems within an organization.The two databases in System Y are poorly modeled, particularly the historical database. Thecause of the poor modeling was unclear concepts.
Teoretisk och experimentell utvärdering av Lättelement AB:s takinfästning
Lattelement AB in Ornskoldsvik is one of the leading companies in Sweden in composite elements in walls, floors and roofs in particular. The company supplies elements to buildings located with a wide geographical variation, which means that the products are subjected to very different climate with regard to snow, wind and humidity. This places high demands and requires the elements to withstand large variable loads.The elements are made of lightweight beams with flanges of structural timber and beam webs made of OSB. These are bound together by nogging pieces with the same kind of structure. On top of the beams a nailed and glued plywood is added to absorb compressive forces and on the underside of the element a sheet of steel is added for tensile absorption.These elements are then attached to the building framework in different ways depending on the particular element height, loads and the structual supporting material of the frame work.
Fodertillgång och stereotypa beteenden under natten hos Asiatisk elefant (Elephas maximus)
Animals in zoos live in more barren environments than their conspecifics in nature. In nature, elephants spend more than 75 % of the day foraging and have been observed lying down two hours during night. Stereotypies are common in many different species in zoos. Stereotypic behaviors may constitute up to 50 % of the daily activity budget of zoo elephants. Modern zoos try to reduce stereotypic behaviors by means of environmental enrichment.
Användandet av samlingsprover för att bestämma besättningsstatus för smitta med Dictyocaulus viviparus hos förstagångsbetande nötkreatur :
Infection with the bovine lungworm - Dictyocaulus viviparus - is occasionally a problem in Swedish cattle herds. The infection could act in synergism with other infections such as Corona virus to create a poorer welfare and productivity in cattle. Studies have shown that a diagnosis can be made with both the Baermann method and with an ELISA. In Norway diagnosis of BVDV on a herd level is attained through pooled serum samples. The question was raised whether pooled serum samples could be used in a similar fashion to attain status on a herd level for lungworm.
Balanserad samhällsbyggnad i Eslövs kommun : fördjupning av översiktsplanen för östra Eslöv
This work has been made in cooperation with the municipality of Eslöv and the inventory area is a part of the deepening of the municipality plan of east Eslöv. The aim of the work is to test the principle of balance in the overall planning. Later in the detailed planning process a more detailed calculation is made and a suggestion of suitable measures for compensation is made. Then the method with green area factors can be used. The goal is to balance the negative influence on the environment from the planned impacts to gain a sustainable development of the city.
The principle of balance means that the one responsible for the development also has to compensate for the negative impacts on nature and landscape that comes with the development.