Denna rapport beskriver utvecklingen av ett system för att växla mellan olika RFID-antenner som skall användas av projektet ?Digital Djurpark?.Systemet ansluts till en RFID-läsare(aktiveringssändare och ID-mottagare) och sex antenner.Det är möjligt att manuellt välja vilken antenn som skall vara aktiv(kopplad till RFID-läsaren) eller aktivera systemet automatisk en antenn och efter en tid byter till nästa i turordning.En antenn aktiveras genom att ett relä slår till och låter signalen passera mellan antenn och RFID-läsaren, antennen avaktiveras när relät slår från. För att aktivera och avaktivera en antenn går en signal från kontrollerkortet till en transistor som i sin tur styr relät.Till varje antennutgång finns också en uppsättning om fem kondensatorer, placerade parallellt med antennen, dessa finns för att kunna finjustera resonansfrekvensen då olika antenner kan skilja i induktans.Styrningen av systemet görs av det sen tidigare använda kontrollerkortet, fast med uppdaterad mjukvara. Det har en USB-port för kommunikation med en dator som tar emot ID från den avlästa taggen och kan välja aktiv antenn. Rapporten tar endast upp mjukvaran som behövs för att kunna växla antenn.Ett förslag på antenn tas fram, vilken består av 2,5mm2 kabel lindad i en kvadratisk spole med sidan ca50cm..

The use of spread spectrum signals has increased dramatically in military applications. Finding methods for detecting and positioning of these signals have become interesting research areas for signal intelligence purposes. One method is to measure the time difference of arrival (TDOA) that occurs when two receivers are synchronous and spatially separated. Based on the TDOA-technique an audio-demonstrator has been developed and implemented. This report describes the theory for how sound received in microphones can be used to extract information about the transmitter?s position from the measured time difference.

The invasive species raccoon dog (Nyctereutes procyonoides) is currently under establishment Sweden and it is vital to discover invading individuals to prevent colonization. The use of wildlife cameras to discover dispersing raccoon dogs have been implemented in the north-European raccoon dog management program. In this study, I test the ability of four commercially available scent lures to attract raccoon dogs to camera stations. The study was conducted in the Åland Islands where raccoon dogs are abundant and the results could improve the effectiveness of the camera stations used in the program. I used 12 sites with five camera stations in each and tested the four lures and one control with no lure in each site.

The forest and mire landscape surrounding the north Swedish villages have been of fundamental importance through time for the farmers. In the Scandinavian summer farm system the forest and mire pasture was used to its full potential. The system consisted of smaller summer farms some kilometres from the main farm in the village, and were the livestock grazed in the forest around the summer farm. The livestock affect their environment, and grazed forests generally contain a higher biodiversity than an ungrazed forest. The overall aim of this thesis is to understand the impact of livestock grazing on a northern forest ecosystem over a long time period.

To turn the dairy heifers out on pasture is the most natural way for the cattle to get feed. At the same time it is cheap and if it is right treated a feed of high nutritive value. The problem today is to get dairy heifers to grow enough when they are grazing at natural pasture for the entire summer. Therefore, the opinions differ whether pasture is a resource or a problem. The increasing interest of pasture production is due to the fact that you can receive grants for preserving valuable natural assets and cultural landscape elements in the pasture land. A high grazing pressure is necessary to preserve an open landscape and a great variety of species. In the same time the heifers have to supply their nutritive needs in order to grow and be large enough to show heat and be pregnant in right time to calve with a sufficient body size and at an economically right age. This paper includes a literature review on natural pasture, pasture production, and growth of dairy heifers together with own interviews with dairy farmers about their point of view to the pasture husbandry on the farms, how they plan for pasture, look after natural pasture, treatment areas and take care of the calves and heifers. The results indicate that the time it takes and the demanded work are the biggest factors to how and why the farmers do as they do..

Denna rapport beskriver utvecklingen av ett system för att växla mellan olika RFID-antenner som skall användas av projektet ?Digital Djurpark?.Systemet ansluts till en RFID-läsare(aktiveringssändare och ID-mottagare) och sex antenner.Det är möjligt att manuellt välja vilken antenn som skall vara aktiv(kopplad till RFID-läsaren) eller aktivera systemet automatisk en antenn och efter en tid byter till nästa i turordning.En antenn aktiveras genom att ett relä slår till och låter signalen passera mellan antenn och RFID-läsaren, antennen avaktiveras när relät slår från. För att aktivera och avaktivera en antenn går en signal från kontrollerkortet till en transistor som i sin tur styr relät.Till varje antennutgång finns också en uppsättning om fem kondensatorer, placerade parallellt med antennen, dessa finns för att kunna finjustera resonansfrekvensen då olika antenner kan skilja i induktans.Styrningen av systemet görs av det sen tidigare använda kontrollerkortet, fast med uppdaterad mjukvara. Det har en USB-port för kommunikation med en dator som tar emot ID från den avlästa taggen och kan välja aktiv antenn. Rapporten tar endast upp mjukvaran som behövs för att kunna växla antenn.Ett förslag på antenn tas fram, vilken består av 2,5mm2 kabel lindad i en kvadratisk spole med sidan ca50cm..

The focus of this study was to examine the nutrients and benthic organisms of the bay ?Mönsteråsviken?, which is influenced by eutrophication. The purpose was also to look at an interesting gradient forming in the bay, namely the distance from the river outflow of Lillån. At 18 sampling sites in the bay samples of water, sediments and benthic organisms were collected in late April of 2011. The water was analyzed for nitrate, phosphate and chlorophyll.

With knowledge of how the southern Swedish forests have been affected by storms the past years, this study intended to find out which factors affect the storm firmness of a stand the most. The study was based on data from stands in the, by the storm Gudrun, affected area. The results of the analyses that tested the stand factors that influence the amount of storm damage to the greatest extent showed that the storm sensitivity of Norway spruce stands were largely due to previous management actions. The factors that could be controlled by thinning and had relevance of storm damage standpoint, according to the results were; the dominant height, volume, basal area weighted mean diameter and stand age at last thinning. In this study, these results are not as clear for Scots pine.

Psittacines and reptiles are exotic animals that are difficult to care for and it requires extra knowledge to make a correct assessment of their wellbeing. An animal welfare inspector, with an education in general animal welfare, may not have a deep enough knowledge of exotic animals to do a proper assessment of the animal?s general condition and its environment. In this paper it was therefore examined if animal welfare inspectors have enough knowledge to do a satisfying inspection of establishments working with selling of exotic animals. A literature study was used to examine difficulties with each species.

Denna rapport beskriver utvecklingen av ett system för att växla mellan olika RFID-antenner som skall användas av projektet ?Digital Djurpark?.Systemet ansluts till en RFID-läsare(aktiveringssändare och ID-mottagare) och sex antenner.Det är möjligt att manuellt välja vilken antenn som skall vara aktiv(kopplad till RFID-läsaren) eller aktivera systemet automatisk en antenn och efter en tid byter till nästa i turordning.En antenn aktiveras genom att ett relä slår till och låter signalen passera mellan antenn och RFID-läsaren, antennen avaktiveras när relät slår från. För att aktivera och avaktivera en antenn går en signal från kontrollerkortet till en transistor som i sin tur styr relät.Till varje antennutgång finns också en uppsättning om fem kondensatorer, placerade parallellt med antennen, dessa finns för att kunna finjustera resonansfrekvensen då olika antenner kan skilja i induktans.Styrningen av systemet görs av det sen tidigare använda kontrollerkortet, fast med uppdaterad mjukvara. Det har en USB-port för kommunikation med en dator som tar emot ID från den avlästa taggen och kan välja aktiv antenn. Rapporten tar endast upp mjukvaran som behövs för att kunna växla antenn.Ett förslag på antenn tas fram, vilken består av 2,5mm2 kabel lindad i en kvadratisk spole med sidan ca50cm..

Over 80% of Sweden's population lives in urban areas, and half of the country's forest visits will thus be in urban woodlands. Social values ??- how the individual experiences the forest, and the impact of the forest visits on individual health and well-being, are pointing to the importance of managing the urban woodlands.When there comes to the cultivation of the urban woodlands there are usually many opinions to consider.This study aims to investigate the various opinions on the use and forestry in an urban recreation area in ??the City of Trollhättan. The study addresses both general and in four cases specific suggestions on management methods.Data was obtained from both quantitative and qualitative study through survey, interviews and discussions with the users of the recreation area.Trollhättan's goal with the recreation area is to make it accessible to local residents. The users are mainly influenced by the accessibility therefore clearings and thinnings are appreciated.

The focus of this study was to examine the nutrients and benthic organisms of the bay ?Mönsteråsviken?, which is influenced by eutrophication. The purpose was also to look at an interesting gradient forming in the bay, namely the distance from the river outflow of Lillån. At 18 sampling sites in the bay samples of water, sediments and benthic organisms were collected in late April of 2011. The water was analyzed for nitrate, phosphate and chlorophyll.

I anestesisjuksköterskans arbetsuppgifter ingår det att verka i samband med larm vilket innebär signal som anger fara, exempelvis vid akuta tillbud som kräver omedelbara vårdåtgäder. Larmsituationer innebär att anestesisjuksköterskan lämnar sin ordinarie arbetsplats och invanda miljö. Anestesisjuksköterskan kan i larmsituationen tappa kontrollen över arbetssituationen om kunskaper och färdigheten är ofullständiga, vilket kan hota patientsäkerheten samt medföra vårdskada och vårdlidande hos patienter. Syftet med denna totalundersökning var att kartlägga vilka kompetenskrav som vårdenhetschefer ställer på anestesisjuksköterskor i samband med larm som sker utanför den normala miljön. För att svara på studiens syfte valdes en kvantitativ ansats med deskriptiv statistik samt kvalitativ innehållsanalys.

The component workshop at Atlas Copco inTierp intends to reduce the costs inorder to increase their competitiveness.This thesis examines how the productionmanagement around cylinder washersshould be managed in a way that meetsthe customer needs. The customer to thecylinder washer is Atlas Copcos assemblydepartment in Tierp.The purpose of this thesis is to providean alternative way of managing theproduction. A chapter of theory is addedto give the reader an insight ofdifferent types of production managementsystems as well as the underlyingknowledge needed to get a better readingexperience. An introduction of kanbancan in theory help Atlas Copco in thedirection they strive. It should beclear how the purpose of this thesisaffects the cost for the componentworkshop and also how it relates to thecurrent production.

Today is one of the goals with zoos to conserve endangered species and some animals may also become reintroduced. But behaviours can change in generations of captive animals because of environments that differ from the wild. Animals must then be prepared before being reintroduced and predator training enhances the animal?s chance to survive in the wild. When training animals to avoid predators it is often necessary to use frightening stimuli.