With the increases in fuel costs due to the depletion of the world oil reserves and the increase of greenhouse gasses as a consequence to using oil as a fuel many companies are looking to new and innovative ways to power their aircraft. One of these new ways to power an aircraft is using fuel cells powered using hydrogen and oxygen, thus producing nothing but water vapour and small amounts of nitrogen dioxide as well as trace amounts of other emissions. Both Boeing (1) and Politecnico di Torino (2) have shown that it is possible to build an all-electric aircraft powered by fuel cells. Both flights used small, two-seater aircraft and a constant between them was the loss of the co-pilot seat due to weight and lack of space. As this paper will deal with a commercial aircraft a primary concern is the cargo and passenger capacity and whatever impact switching propulsion system has on these.

Syftet med den här studien är att undersöka vilka motiv utifrån Self-Determination Theory (SDT) som är främst förekommande samt vilken intensitet och frekvens gymmotionärer har till att motionera. Detta har undersökts genom självskattningsformulär där instrumenten Goal Content for Exercise Questionnaire (GCEQ) och Godin Leisure Time Exercise Questionnaire(GLTEQ) har använts. Deltagarna för studien (n=164) bestod av både män (n=82)och kvinnor (n=82) i fyra ålderskategorier yngrevuxna, vuxna, äldre vuxna och äldre. Resultatet visar att inre målorienteringar är starkare motiv än yttre för ökad motionsintensitet och frekvens. Resultatet visar även att män har en högre frekvens än kvinnor inom ansträngande motion.

This master thesis is a study of the Swedish hydropower capacity to balance wind power. The Swedish government has decided that it should be possible to produce 30 TWh from wind power in the year 2020. The Swedish municipalities have to have plans for wind power plants with total yearly generation of 30 TWh. Wind power is an variable energy source that needs to be balanced by other energy sources. In Sweden the Swedish hydropower can be used for balancing a large scale introduction of wind power.

Syftet med den aktuella studien var att inom svenska tipselitlag (1) undersöka samband mel-lan upplevd talangutvecklingsmiljö, självbestämmande och generellt välmående samt (2) un-dersöka till vilken grad den upplevda talangutvecklingsmiljön och självbestämmande kan predicera spelarens generella välmående. I studien deltog 117 manliga fotbollsspelare i åld-rarna 14-19 år(M=16,61, Sd=1,05) från fem svenska elitfotbollsföreningars tipselitlag vilka spelade i pojkallsvenskan (N=60) eller juniorallsvenskan (N=57). I studien användes Self-Determination Scale (SDS) för att mäta i vilken utsträckning spelarna upplevde sig fungera på ett självbestämmande sätt, General Health Questionnaire-12 (GHQ-12) för att mäta uppskat-tad psykisk hälsa och Talent Development Environment Questionnaire (TDEQ) vilken avsåg mäta spelarens upplevelse av talangutvecklingsmiljön. Resultatet visade att det fanns positiva statistiskt signifikanta samband mellan de tre variablerna upplevd talangutvecklingsmiljö, självbestämmande och välmående. Vidare påvisades att upplevd talangutvecklingsmiljö och självbestämmande förklarar 27,5% av den totala variansen av generellt välmående hos spelar-na.

Abstract Tripeptidyl-peptidase II (TPPII), is present in most eukaryotic cells. It cuts tripeptides from the N-terminus of peptides and is especially important for degrading peptides longer than 15 amino acids. TPPII also tailors long peptides into suitable substrates for the enzymes which transport and produce the peptides that MHC I present. Increased levels of TPPII have also been found in certain cancer cells, thus it is of interest to determine if TPPII could be used as a tumour marker.The aim of this study was to optimise and evaluate 3 different methods for quantifying TPPII. Western blot, enzyme-linked immunosorbent assay (ELISA) and fluorophore-linked immunosorbent assay (FLISA) protocols were optimised regarding incubation times and antibody dilutions.

Travelling by train has increased during the last decades in Sweden. This has put pressure on the existing infrastructure and has created problems with delays and cancelled departures. The railway is a complex system with mutual dependencies and high vulnerability for disruptions. The situation for the railway system in the Stockholm region is today strained. The capacity is fully used.

Motivation är en betydelsefull kompontent för en individs utövande utav studier. Studien utgick ifrån motivationsteorin Self- determination theory. Syftet med studien var att redogöra för relationen mellan högskolestudenters demografiska faktorer och vilken typ av motivation som driver dem till att utöva studier, samt relationen mellan motivationstyperna. Med typ av motivation avses amotivation, inre samt yttre motivation. Studien bestod utav 102 studenter, varav 49 män och 53 kvinnor, från en högskola i mellersta Sverige som fick besvara enkäten The Academic Motivation Scale.

TCP (Transmission Control Protocol) is a transport protocol designed for the wired Internet. In wireless networks packet losses occur more frequently due to the unreliability of the physical link. The main problem is that TCP treats all losses as congestion, which leads to a lower throughput. Ad hoc networks are multihop wireless networks of mobile nodes, where each node can allow other packets to pass through it. Topology changes often occur and may lead to packet losses and delays, which TCP misinterprets as congestion.

Piled friction soil show a set-up which is increasing with the time after installation. The cost could be reduced if the set-up had been taken into account when designing but in Sweden it is very unusual to do that. Previous studies showed that set-up can vary between 25 % and 75 % during the first 90 days after pile installation. This showed that the effect of the phenomenon is difficult to predict. A study involving five projects have been carried out by specifying certain parameters like pile type, method for pile installation and test method for measure the bearing capacity in friction soils located in Sweden.

In today?s World is climate change an important and hot topic. Climate scenarios for Sweden show a warmer climate, especially during the autumn, winter and spring. The same climate scenarios also show that the precipitation will increase during this part of the year, however, during the summer the opposite is expected to occur. The purpose of this essay is to examine how future climate change will affect Stockholm especially the expected increase in precipitation, which may lead to a rising level of the Lake Mälaren. During 2000/2001 was Stockholm hit by a flood. This flood nearly resulted in major consequences and showed that there were significant risks for the city of Stockholm and increasing precipitation will result in even more water in the drainage systems of Lake Mälaren. The results presented here show that it is important to increase the drainage capacity of Lake Mälaren in order to reduce the risks of flooding in the central parts of Stockholm.

Personal assistance from a welfare perspective, offering a variety of reasons is perceived as a different design assistance than is usually there in the public social assistance depending on the strong foundations of the handicap principle autonomy and influence is in terms of how, what and when the operation is performed. The aim of our study was to highlight the handicap principle influence and autonomy in the operation of personal assistance. It is intended both to illustrate the legislature's intentions and ideologues expectations and also to examine a number of managers and personal assistants experiences of the conditions that exist for realize these principles. In order to answer our purpose and our issues, we have chosen a qualitative approach. We have first conducted a literature review and secondly implemented six interviews with personal assistants and managers.

This study was conducted to investigate the relationship between perceived popularity, social information processing and working memory. With the intentions of examining popularity 209 (98 female, 111 male) children in second and fourth grade were presented with a roster of their classmates and were to nominate whom they liked and whom they disliked. To study working memory capacity a working memory test, that places demands on the participant to work both with and store the given information, was used. To examine children's cognitive processing of empathy-provoking information a cognitive appraisal interview was conducted. The results imply (a) that working memory increases with age, (b) that there is a weak relation between working memory capacity and popularity, and between popularity and cognitive processing styles and (c) that there are some strong correlations between working memory and cognitive processing styles..

En distinktion görs mellan inre och yttre motivation. Inre motivationframstår när individen agerar därför att det genuint intresserar henne.Yttre motivation framstår när individen agerar för extern belöning.Self-Determination teorin föreskriver att tillsammans ger degrundläggande psykologiska behoven autonomi, kompetens ochrelaterande upphov till inre motivation. Teorin sammankopplarmotivation med personlighetsorienteringar genom tremotivationsstilar: självbestämmande stil, kontrollerande stil ochopersonlig stil. Syftet med studien var att undersöka sambandetmellan en individs inre motivation och individens generellaarbetsmotivation, samt hur psykologiska behov korrelerar med deolika motivationsstilarna. En enkätstudie genomfördes med 87deltagare.

This project investigated how elevation and vegetation type influences variation in plant litter phenolic content and protein precipitation capacity among and within common plant species for two different vegetation types, heath and meadow, in a subarctic ecosystem in the Abisko region of northern Sweden. As nutrient availability generally decreases with increasing elevation as a result of decreasing temperature, I hypothesised that phenolic content would increase with elevation and be higher on the heath than the meadow. To test this, the total phenolic content and protein precipitation capacity was estimated in leaf litter from 13 species in both heath and meadow vegetation across an elevational gradient ranging from 500 to 1000 meters above sea level (m.a.s.l.) in the study region. The results showed that elevation and vegetation type both had a strong impact on both variables. Total phenolic concentrations decreased with elevation for the meadow, and were greater for the heath than the meadow.

Smartmobilens användande har successivt ökat och blivit en central del i vår vardag. I och med detta har antalet olika applikationer ökat och numera finns det en mängd olika typer av applikationer som tillfredsställer användarens behov. I den här studien har vi därför försökt ta reda på om träningsapplikationer har förmågan att motivera användaren vid träning. Vi har observerat fem kvinnor och tre män, med varierande erfarenheter av träningsapplikationer, som har deltagit i en fyra veckor lång studie bestående av två faser. Under Fas 1 har respondenterna laddat ned två valfria träningsapplikationer som de testat och under Fas 2 har de använt en specifik applikation.