AbstractThis Master?s thesis analyses the dynamics of the medieval counterweight lever engine, ortrebuchet, a type of mechanical artillery. The purpose is to study the differences between different types of these machines, and see if computer simulations can be used to validate preserved advice on construction. Simulations include machines with a fixed counterweight, a hinged counterweight and a combination of both counterweights.Due to the almost complete lack of archaeological finds and insufficient historical source material there are still, after more than a century of research, many unanswered questions concerning the design and performance of these machines.The present study is based on an analysis by Jahsman (2004). A more detailed mathematical model employing Coulomb-friction is used.

Fibroblast growth factors are signaling peptides that controls important cellular processes such as proliferation, differentiation, migration, adhesion and survival. Through binding to different types of receptors on the cell surface, these peptides can have different effect on the target cell. Which effect that is achieved depends on many factors. Thus, each of the 24 known FGFs different biological responses. The FGF receptors (FGFR 1-4) initiates different intracellular pathways which in turn leads to different biological responses.

Pigs in Swedish organic production systems have been shown to have more findings of arthritis at slaughter, compared to pigs in conventional pig production. With this in mind a study was performed, to primary, investigate variation in exterior, gait and weight gain between sire breeds and, secondly, to investigate variation between herds, season, gender, age and assessment occasion on these recordings. Swedish commercial hybrids, crosses between Norwegian Landrace and Swedish Yorkshire were inseminated with either Hampshire or Duroc as terminal sire. All the pigs had known pedigree as each semen dose contained sperms from one individual boar. All piglets were individually tagged closely after birth, and exterior and gait assessment were performed at two separate occasions, early and late during the fattening period.

Team cognition är en teori som beskriver gruppers beslutsfattandeprocesser. Detta arbete utvärderaren modell för team cognition baserat på mutual belief samt analyserar ett kodningsschema som ärbaserat på denna modell. Modellen utvärderades med hjälp av en högpresterande grupp dataspelare(World of Warcraft) vars kommunikation analyserades. Dataspelarnas kommunikation transkriberades och kodades enligt kodningsschemat. Analysen visade att mycket av spelarnas verbala kommunikation berör visuella cues exempelvis andra spelares positionering och aktiviteter.

Syftet med detta arbete är att undersöka om det är möjligt att bygga en modell över innerörat med dess basilära membran. Om detta skulle visa sig vara möjligt, är nästa frågeställning hur en sådan modell skulle kunna fungera pedagogiskt och uppfattas av elever.Modellen som arbetet lett fram till är konstruerad som en låda, gjord av plexiglas, vilken skall motsvara en utrullad hörselsnäcka. Som membran har en uppsättning gummiband använts. Vidare aktiveras modellen med hjälp av en högtalare som får motsvara örats trumhinna. Det har visat sig att modellens membran beter sig på ett sätt som liknar det basilära membranet i hörselsnäckan.

This project is a literature study with the hypothesis that Arctic climate has a positive effect on the accumulation of metabolites in berries. Plant metabolites are often divided into primary and secondary metabolites. Primary metabolites such as proteins and nucleic acids are essential for cell function, while secondary metabolites are often non-essential, but have important functions regarding reproduction and survival. The berries mentioned in this project are from the families Ericaceae, Rosaceae, Elaeagnaceae och Grossulariaceae.The conclusion drawn from this literature study is that it is not obvious what favours accumulation of metabolites in berries. Other factors aside from climate affect the production of secondary metabolites, such as time of harvest, cultivars and ripeness.

During the last decade millions of people have migrated to Europe. Parallel to this development, we see that many countries are becoming more hostile towards immigration. The success of radical right-wing parties (RHP) has been accredited to natives within the receiving countries turning to RHP to reduce their perceived threat from immigrants. Paradoxically, the RHP-support has also increased significantly among the immigrant population given the common assumption that immigrants are in solidarity with regards to shared experiences of immigration. In this dissertation, I argue for the importance of considering the increased RHP-support amongst immigrants, something that has been neglected in contemporary research.

This essay examines the indirect effects of the local strength of the Swedish Democrats on refugee acceptance in the Swedish municipalities. With statistical methods this essay has aimed to investigate if such effects exist and by using statistical data from three periods of time - 2002, 2006 and 2010 ? the investigation has been able to measure effects over time. Based on former research and reasonable expectations the hypothesis for the essay claims that the Swedish Democrats has got an indirect effect upon the refugee acceptance. With the statistical analyses made, the essay is able to conclude that the strength of the Swedish Democrats in municipality elections as well as the change of this strength between the elections does have a negative effect upon refugee acceptance in the Swedish municipalities.

I denna studie studeras den europeiska integrationen ur ett konvergensperspektiv där inkomstkonvergensen spanska regioner emellan får fungera som exempel. Med hjälp av ett paneldataset innehållande data på bland annat inkomst och tilldelade fondmedel från EU för 17 spanska regioner för perioden 1980-2004, gör vi konvergensskattningar med fixed effects och finner stöd för inkomstkonvergens på 2,7 procent. Denna inkomstkonvergens innebär att regioner med initialt låg inkomst i genomsnitt har haft en högre tillväxt än rikare regioner. Vi kan dock ej finna något starkt samband mellan de strukturfonder regionerna erhållit och denna konvergens..

Purpose ? The purpose of this study is to identify and describe how consumer perceptions regarding information quality, sender credibility and effect of eWOM-communication differ between Facebook and Prisjakt.Approach ? Based on previous research an analytical model was designed. The parts in the model were the aspects of the problem which the present study aimed to examine. An experimental design was applied in which ten students at Örebro University were exposed to a scenario where they took part of eWOM-communication concerning a specific product on Facebook and Prisjakt and then had to answer questions in an interview. The analytical model formed the base of the interview guide used in the interview and the specific product was chosen with help from a focus group.Implication ? The study illustrates that consumers may perceive the quality higher on Prisjakt while the sender credibility can be perceived higher on Facebook.

The technological development and increasing popularity for integrated multichannel solutions constitutes both severe opportunities and challenges for todays' and tomorrows' retailers. On the account of consumers leaving traces when using digital channels and the technological development enabling retailers to use this information to create relevant offers, goal-congruity is relevant to apply in the multichannel shopping context. Based upon previous research on goal congruity and channel integration, our main purpose in this study is to increase the understanding for how congruity in an offer increases the intention to redeem the offer. Several studies focus on and contrast the product characteristics hedonic and utilitarian. However, it has been stated that it is crucial that research also examines the difference in target audience, buying situation and as examined in this study: buying decision process.

Syftet med uppsatsen är att öka förståelsen för hur Försvarsmakten fattar beslut rörande logistikens genomförande för svenska förband insatta utomlands. Uppsatsen analyserar huruvida Försvarsmaktens beslut rörande logistikgenomförandet för de svenska markstridsförbanden i ISAF varit rationella och i enlighet med hur logistiken är planerad att genomföras, samt på vilket sätt logistikgenomförandet har förändrats. Teorimodellen i arbetet har varit Graham T. Allisons tre modeller, Modell I om rationell aktör, Modell II det organisatoriska perspektivet samt Modell III det byråkratiska perspektivet. Analysen av beslutsprocessen med de två fallen med Pansarterrängbil 6 och Bandvagnssystem 10 med ett logistikperspektiv i fokus, har visat att Försvarsmakten ur ett aktörsperspektiv agerat rationellt enligt Modell I i de två analyserade fallen.

Sahlgrenska Academyat University of GothenburgDepartment of Internal Medicine and Clinical NutritionAbstractTitle: Oral intake of green tea and its effect on the appearance of UV-induced erythema, erythema solare ? A systematic literature reviewAuthors: Ernita Antoni Mulliqi and Pernilla GustafssonSupervisor: Sofia KlingbergExaminer: Ingrid LarssonProgramme: Dietetics programme, 180/240 ECTSType of paper: Examination paper, 15 hpDate: April 10, 2013Background: UV irradiation of the skin can cause erythema, clinically called erythema solare. The condition can exert pain as well as discomfort and may in the long term lead to negative effects including skin cancer. Green tea contains catechins which are substances with anti-inflammatory effect that may have positive effects on the skin. The intake of green tea is believed to have a protective effect against UV irradiation, since green tea extracts in lotions in previous studies have shown to increase the skin tolerance level against UV irradiation.Objective: To examine the scientific basis and determine whether an oral intake of green tea has a protective effect against UV-induced erythema.Search strategy: Searches in the scientific databases PubMed and Scopus were made to find suitable articles.

Syfte: Att genom användning utvärdera en egenhändigt sammansatt modell. Modellen är baserad på transaktionskostnadsteorin, resursbaserat synsätt och nätverksteori. Den är utformad för att ta fram underlag inför outsourcingbeslut och för utvärdering och felsökning av redan befintliga outsourcingrelationer. Att genom en fallstudie visa på hur vår modell kan användas i praktiken. Vi hoppas på så sätt dels kunna guida läsaren i hur modellen ska användas, dels kunna upptäcka och visa på vilka eventuella brister och/eller begränsningar modellen har.

This essay attempts to show a relativistic effect on the representation of motion situations. A summarize and defence for lingusitic relativity as scientifically valid and some taxonomic clarifications is initially presented. The relativistic effect is measured by using the elicitation tool Event Triads, developed at the Max Planck Institute for Psycholinguistics. The tool consists of a set of films displaying various motions. Test-subjects are asked to verbalize a situation in a way they see fit.