This master thesis has been performed at Vattenfall Power Consultant in Gothenburg and Trollhättan for Vattenfall Vattenkraft. In this report vacuum circuit breaker in small-scale hydropower stations with the rated power 4 MVA and below has been studied. Models of the stations are modeled and analyzed in PSCAD/EMTDC to study the high voltage transients that are created after current chopping with vacuum circuit breaker. Vacuum circuit breaker may chop the current before it reaches zero value, which means that high voltage transients can be created. The equipment of the stations can be destroyed by high voltage transients.The purpose of this thesis is to examine the use of vacuum circuit breaker in small-scale hydropower stations and the risk for high voltage transients from current chopping.According to the results there is a risk of high voltage transients after current chopping with small synchronous generators in stations with the operating voltages 0.4 kV and 3.6 kV.

This project was started within the Market-Design programme of Elforsk, with the aim of developing representative test systems of Swedish distribution networks. Using such test systems as a basis for reliability and customer interruption cost calculations makes it feasible to analyse the network tariff regulation of Swedish power  istribution companies. In particular, it enables studies of the incentives for companies to invest in system reliability. Until now, the available test systems are either not representative of Swedish conditions, or too small in scale and limited in function.Within this project we have created two test systems. In order to represent the diversity of actual Swedish distribution networks, we have created one test system for urban environments and another for rural environments.

The project, Glowtest Fixture, has been carried out to and in collaboration with MSA SordinLtd. MSA Sordin Ltd produces and sells ear protector and is at present a supplier on theworld market. Glowtest Fixture is a product for glow testing off detailed components in oneear protector. MSA Sordin Ltd sends today away your products for testing what is anexpensive aspect in their development. The project's aim is to take forward a test equipmentthat copes with those high nonplussed requirements and wishes that are required for anapproved physical execution.Glowtest Fixture is a physical equipment that comes used stem glow physical off all detailedcomponents in one ear protector.

As a small and land scarce country, effective waste management is ofoutmost importance in Singapore. In this study the production of biogasthrough anaerobic digestion from the organic fraction of municipal solidwaste (OFMSW) was compared to incineration of the waste. At the momentalmost all of the OFMSW in Singapore is incinerated. Three differentscenarios were compared to the reference scenario (incineration): one with alarge scale biogas plant that can treat half of all OFMSW in Singapore, onewith a medium scale biogas plant about 15 times smaller than the large oneand one with a small scale biogas plant that can treat waste from e.g. ashopping center or a food center.By using life cycle assessment (LCA) the different scenarios were comparedin terms of global warming potential (GWP), acidification, eutrophication,energy use and land use.

A bioslurry reactor was built for the bioremediation of TNT contaminated waste from the demilitarization industry. The field test was conducted at Vingåkersverken in Vingåker, Sweden, to see if results from laboratory studies could be repeated in a full scale reactor. The goal of the project was to optimize the reactor to such a degree that it could be used to handle the waste produced at Vingåkersverken and also that this technique could be applied for remediation of contaminated soils. Unfortunately the samples taken during the full scale field test were destroyed by the shipping company and no analysis was possible. A later attempt by the Biorex research group has also been unsuccessful to reduce the amount of TNT using the bioreactor.

Syfte: Studiens syfte var att reliabilitetspröva stabiliteten för M-SES för patienter med långvarig smärta genom test-retest metoden. Syftet var även att undersöka samtidig validitet för M-SES, genom att utföra M-SES och SES mätt vid samma tillfälle.Metod: I studien undersöktes self-efficacy instrumentet M-SES på Uppsala Akademiska sjukhus, på avdelningarna för Smärtcentrum och Smärtrehabilitering. Frågeställningarna berörde vilken stabilitets reliabilitet mätt med test-retest som förelåg hos M-SES, samt vilken grad av samtidig validitet som förelåg för M-SES korrelerat med SES. Den slutliga undersökningsgruppen bestod i frågeställningen om stabilitets reliabilitet av 29 patienter (23 kvinnor, sex män), och i frågeställning om samtidig validitet av 22 patienter (17 kvinnor, fem män).Resultat: Vid prövning av stabilitets reliabilitet för M-SES visade resultatet en stark korrelation, med korrelationskoefficient 0,92 och p<0,05. Det förelåg även en god överrensstämmelse för test-retest undersökningen.

The aim with my master thesis is to develop and test the applicability of methods to quantify and map solute advective travel times and pollutant transport at the catchment scale. Such quantification and mapping can increase the understanding of catchment-scale pollutant transport in general and contribute to the identification of the main sources of water pollution and the most efficient measures to reduce such pollution. The study area is the catchment of Oxundaån, about 20 km north of Stockholm. For detailed GIS modeling of water flow and catchment-scale contaminant transport in water, I´ve used new high-resolution elevation maps, land cover maps and soil maps combined with other available relevant data..

I syfte att undersöka psykometriska egenskaper hos Affektiv självskattningsskala (AS-18) fyllde 88 patienter med diagnos bipolär typ I (N=46) eller typ II (N=42) i självskattningsskalorna AS-18 och MADRS-S vid två tillfällen med en dags mellanrum. Principalkomponentsanalys för AS-18 genomfördes med extrahering av två komponenter. Items laddade i de delskalor de tillhörde. Intern konsistens mättes med Cronbachs alfa och överensstämmelse med Cohens kappa. Test-retest-reliabiliteten beräknades.

As a small and land scarce country, effective waste management is ofoutmost importance in Singapore. In this study the production of biogasthrough anaerobic digestion from the organic fraction of municipal solidwaste (OFMSW) was compared to incineration of the waste. At the momentalmost all of the OFMSW in Singapore is incinerated. Three differentscenarios were compared to the reference scenario (incineration): one with alarge scale biogas plant that can treat half of all OFMSW in Singapore, onewith a medium scale biogas plant about 15 times smaller than the large oneand one with a small scale biogas plant that can treat waste from e.g. ashopping center or a food center.By using life cycle assessment (LCA) the different scenarios were comparedin terms of global warming potential (GWP), acidification, eutrophication,energy use and land use.

Bakgrund: Self-efficacy, en persons tilltro till sin förmåga, är en faktor som påverkar hälsobeteenden såsom fysisk aktivitet. Exercise Self-Efficacy Scale mäter denna egenskap genom självskattning, men har inte utvärderats för personer med schizofreni.Syfte: Att omarbeta Exercise Self-Efficacy Scale för personer med schizofreni.Metod: Deskriptiv design med psykometrisk prövning av den omarbetade Exercise Self-Efficacy Scale. Första delen av studien bestod av fokusgrupper med patienter och personal på en psykiatrisk öppenvårdsmottagning för patienter med psykossjukdom. Utifrån resultatet av dessa utvecklades Exercise Self-Efficacy Scale ? Schizophrenia Version.

Moelven Skog AB is currently working actively to increase the number of certified forest owners in private small-scale forestry. This study was conducted in collaboration with Moelven Skog AB and seeks to learn why private small scale forest owners not yet have certified their forestry and what should be done to increase the number of certified forest owners. The study was conducted through a questionnaire study. The result of the study shows that information needs of forest certification to private small scale forest owners is great. Many non-certified forest owners have not even heard of either PEFC or FSC. The majority of respondents also have no education in forestry.

The aiming with this project is to find out if a small scale chicken production can be profitable, from day-old chicks to a processed smoked product out to stores and consumers. The products will not be available in the stores all the time because we will give the customers quality rather than quantity, so when the product can?t be found in the stores the customers will ask for it. The conclusion I found out is that it might be hard to raise chickens in these scale from an economic point of view the costs for transport, logistics, slaughter and marketing are to high..

Bakgrund: Self-efficacy, en persons tilltro till sin förmåga, är en faktor som påverkar hälsobeteenden såsom fysisk aktivitet. Exercise Self-Efficacy Scale mäter denna egenskap genom självskattning, men har inte utvärderats för personer med schizofreni.Syfte: Att omarbeta Exercise Self-Efficacy Scale för personer med schizofreni.Metod: Deskriptiv design med psykometrisk prövning av den omarbetade Exercise Self-Efficacy Scale. Första delen av studien bestod av fokusgrupper med patienter och personal på en psykiatrisk öppenvårdsmottagning för patienter med psykossjukdom. Utifrån resultatet av dessa utvecklades Exercise Self-Efficacy Scale ? Schizophrenia Version.

Bakgrund: Self-efficacy, en persons tilltro till sin förmåga, är en faktor som påverkar hälsobeteenden såsom fysisk aktivitet. Exercise Self-Efficacy Scale mäter denna egenskap genom självskattning, men har inte utvärderats för personer med schizofreni.Syfte: Att omarbeta Exercise Self-Efficacy Scale för personer med schizofreni.Metod: Deskriptiv design med psykometrisk prövning av den omarbetade Exercise Self-Efficacy Scale. Första delen av studien bestod av fokusgrupper med patienter och personal på en psykiatrisk öppenvårdsmottagning för patienter med psykossjukdom. Utifrån resultatet av dessa utvecklades Exercise Self-Efficacy Scale ? Schizophrenia Version.

Over time, species colonize new areas naturally or through humans. The colonizers areoften few and founded populations represent only a fraction of the genetic diversityexisting in the original population. If the established population becomes isolated afterthe colonization event genetic diversity will remain low and if the population, in addition,remains small in size for an extended period this will lead to increased inbreeding andpossibly inbreeding depression. Metrioptera roeselii is a common species with awidespread distribution in continental Europe. During the last century, it has expanded tothe Scandinavian Peninsula which is separated from continental Europe by the Baltic Sea.My aim was to test the hypothesis that individuals in isolated populations in Scandinaviaincluding Denmark and the Baltic Sea islands are smaller than individuals in thecontinuous part of its distribution due to low genetic diversity and lacking incoming geneflow.