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761 Uppsatser om Radiation protection - Sida 22 av 51

Konstruktion av styrelektronik till testfixtur

The focus of this thesis is primarily in electronic construction and describes the design process for a microcontroller circuit board from concept development to prototyping. The client develops test fixtures for automated testing of products within the electronics industry and needs a new controller circuit for the test fixtures that can handle controls and basic testing. An investigation into the needs of such a system is conducted and a prototype printed circuit board assembly is manufactured.The prototype is developed with focus on protection against electrostatic discharges and overvoltage. Among the functions that are included are voltage measurements, communication interfaces and control of input and output currents. Firmware for the prototype is developed and configured to communicate with a PC through USB interface for control and collecting of measurements..

Protection of Regional Values - A comparative study of EU and ASEAN

Regionalisation has become an increasingly important phenomenon in a globalized world. As models of regional integration, the European Union (EU) and the Association of Southeast Asian Nations (ASEAN) are two prominent examples. This thesis seeks to explore through a comparative analysis, the different mechanisms and institutions for handling breaches against fundamental values within the two regional organizations. Inter-linked with the issue of the legal-institutional framework is that of what values the mechanisms are designed to protect. The method used for the analysis is first and foremost that of public international and European law, but the thesis also attempts to give a broader picture of the issues presented.

Höjdförändringar på Lomonosovfonna, Svalbard, 1996-2012

The climate changes and the global warming have a great impact on the Arctic environments. This partially depends on that the albedo is getting lower when snow and ice is melting and exposes more and more dark surfaces of the land and sea. This leads to a feedback effect; the melting accelerates because dark surfaces attract more sun radiation. Because of the heating the glaciers in Arctic retreat. The purpose of this report is to obtain an eventual change in elevation on the glacier Lomonosovfonna that is located on Svalbard by comparing elevation data collected by NASA and GPS data from 1996-2012.

Säkerheten i trådlösa nätverk

The number of wireless networks has increased rapidly among both home users and companies in just a few years. That has brought a lot of good things with it, for example the possibility to connect wireless equipment to the network or Internet from an arbitrary position within range of the accesspoint. But since the transmissions take place through the air some new security risks appear. It?s difficult to restrict the signals to a specific space and thereby a lot easier for unauthorized to eavesdrop or disturb the signals compared to a traditional wired network.

Hantering av skadade styrstavar

The thesis was performed at Forsmarks Kraftgrupp AB in the department ofmechanical engineering, FTCM. Forsmark nuclear power plant has had problems with cracks in some of the controlrods which are placed in the reactor at Forsmark 3. To investigate the cause of this,material samples were taken from five of the damaged control rods. This sampling ofthe rods resulted too short rods to be transported in the shipping container to theinterim storage facility for used nuclear fuel in Oskarshamn. Control rods are crucial components in a nuclear reactor, regulating the reactoreffect by blocking or unblocking fuel rods. Control rods which have been in thereactor are always handled under water in order to protect against the radiation theyemit. The task was to design a control rod adapter that extends the control rod sotransport can be performed from Forsmark. The goal of the work was a complete setof blueprints so the control rod adapter can be manufactured and mounted on theshort control rods and then be transported to the interim storage facility. The work began with mapping of how control rods normally being handled from thereactor to the interim storage facility.

Industrilandskapet i Norrköping : Kunskaper, värden och väg till bevarande

This study focuses the development on the protection of landscapes with old industries and how it nowadays is appreciated by the inhabitants. The overall aim of this study is to increase the knowledge about how the so called industrial landscape in Norrköping became a cultural heritage that the citizens want to protect. The study also aims to investigate the citizens´ knowledge about the industrial landscape in Norrköping, and what value they think that the place possesses. Data was collected by an information research and six qualitative interviews. The interviews where analysed by qualitative methods techniques.

Energimässig jämföelse med investeringskalkyl av två förskolor

This thesis includes an energy survey of the Herrgården pre-school, which has a modern heating- and ventilation system, and a comparison with Östers pre-school which has an older system. An energy survey of Östers pre-school has already been done by a group of three students and all the calculations and values have been collected from that survey. As of today, both pre-schools are heated thru district heating. It will be much easier to make smart and feasible energy-saving-measures by first conducting the energy survey.Herrgården pre-school in Gävle houses 81 children, therteen teachers, one cleaner and one cook. It was finished in the middle of 2009 and the staff has been very pleased with the in-door climate.

Energieffektivisering ombord M/S Sydfart : Med hjälp av solceller

The goal of this paper is to find out how solar cells can improve energy efficiency on-board M/S Sydfart. The paper is based on a number of energy measurements on board the M/S Sydfart. The solar surface is calculated by measuring the available space for installing solar panels. Global radiation data is taken from STRÅNG's database, the data is then used to calculate the theoretical power produced by the solar cells. Energy efficiency is analysed in two ways.

Förbättrad tillgång till referensmaterial vid röntgentolkning

This thesis includes an energy survey of the Herrgården pre-school, which has a modern heating- and ventilation system, and a comparison with Östers pre-school which has an older system. An energy survey of Östers pre-school has already been done by a group of three students and all the calculations and values have been collected from that survey. As of today, both pre-schools are heated thru district heating. It will be much easier to make smart and feasible energy-saving-measures by first conducting the energy survey.Herrgården pre-school in Gävle houses 81 children, therteen teachers, one cleaner and one cook. It was finished in the middle of 2009 and the staff has been very pleased with the in-door climate.

Robot-Assisterad Gradningscell med Force Control

This thesis includes an energy survey of the Herrgården pre-school, which has a modern heating- and ventilation system, and a comparison with Östers pre-school which has an older system. An energy survey of Östers pre-school has already been done by a group of three students and all the calculations and values have been collected from that survey. As of today, both pre-schools are heated thru district heating. It will be much easier to make smart and feasible energy-saving-measures by first conducting the energy survey.Herrgården pre-school in Gävle houses 81 children, therteen teachers, one cleaner and one cook. It was finished in the middle of 2009 and the staff has been very pleased with the in-door climate.

Utvärdering av magnetiska alternativ till optisk scanning

This thesis includes an energy survey of the Herrgården pre-school, which has a modern heating- and ventilation system, and a comparison with Östers pre-school which has an older system. An energy survey of Östers pre-school has already been done by a group of three students and all the calculations and values have been collected from that survey. As of today, both pre-schools are heated thru district heating. It will be much easier to make smart and feasible energy-saving-measures by first conducting the energy survey.Herrgården pre-school in Gävle houses 81 children, therteen teachers, one cleaner and one cook. It was finished in the middle of 2009 and the staff has been very pleased with the in-door climate.

Radiografisk undersökning av belastade knän vid artrosfrågeställning : Jämförelse av stråldoser och undersökningstid

Syfte: Att jämföra patientens totala stråldos och undersökningstid från metoderna konventionell röntgen och genomlysning vid undersökningen belastade knän med artrosfrågeställning.Metod: Datainsamlingen utfördes genom att det delades ut dosprotokoll där röntgensjuksköterskorna på röntgenavdelningen fick skriva upp stråldoser och undersökningstid. Datainsamlingen gjordes under en fyraveckorsperiod på ett medelstort sjukhus i Sverige. Datainsamlingen jämfördes genom en hypotesprövning där det utfördes ett Mann-Whitney U-test med en signifikansnivå på fem procent för att se om nollhypotesen (ingen skillnad i stråldos eller tid) höll.Resultat: Studiens nollhypotes för stråldoserna förkastades som hade medelvärdet 444,37 mGycm² (genomlysning) och 212,24 mGycm² (konventionell röntgen). Nollhypotesen för undersökningstiderna förkastades också som hade medelvärdena 5,08 minuter (genomlysning) och 8,48 minuter (konventionell röntgen). Signifikansnivån för båda faktorerna var lägre än 0,001 och därför behölls mothypoteserna att det fanns en skillnad mellan modaliteterna.Slutsats: Studiens resultat visade att konventionell röntgen är den bäst lämpade metoden att använda stråldosmässigt medan genomlysningen är bäst lämpad tidsmässigt.

Markägare i Stockholms län och deras inställning till biodiversitet och skydd av mark :

This report investigates what attitude private forest owners in the County of Stockholm, Sweden have towards biodiversity landconservation. Private landowners were asked to answer a questionnaire containing questions about there property and there attitude towards biodiversity. The results show that private landowners attitude towards biodiversity is affected by, amongst other things, the size of their property; a larger property have a more negative owner than a smaller property. A landowner that lives on his property has a more negative attitude towards biodiversity than a landowner that?s not living on his property.

Scintigrafisk undersökning av esofagusmotilitet hos häst :

Scintigraphic examination of the esophagus has for some time been the method of choice for the study of motility dysfunction in humans. The method has not yet been described for horses hence the lack of reference values for passage time for a bolus through the esophagus in healthy subjects. The purposes of this study were to measure passage velocity and time for a bolus to pass through the esophagus in healthy subjects, as well as to evaluate the reproducibility of the method. Eight warm-blooded trotters were used in the study. The horses were sedated with a low dose of Acepromazine prior to onset of the study.

Perceptions of domestic solar systems : a study on non-adopter views of a new technology

The world is currently facing a huge severe challenge in handling the issue of climate change. One of the ways to lower the green house gas emissions, which is seen as one of the main contributor to the climate crisis, is to use renewable technologies such as for example photovoltaic (PV) systems. PV-systems are also suitable for so called micro production, small scale energy production facilities, since it can be placed on practically any rooftop with the right solar conditions. In Sweden the usage of PV-systems has not yet gotten any wider spreading, even though the solar radiation conditions are very similar to countries that produce a lot of solar energy, as for example Germany. The aim of this paper is to describe non-adopter perceptions of PV-systems. The study holds a qualitative approach using deep interviews for data collection.

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