Male piglets have been castrated for centuries to avoid contamination of their meat with boar taint, a strongly unpleasant odour that makes the meat inedible. Today boar taint can be prohib-ited by vaccination against gonadotropin releasing hormone (GnRH) using Improvac®. The aim of this study was to evaluate the efficiency of vaccination on growth performance and behaviour of vaccinated male pigs compared to surgically castrated male pigs. The effect of two feeding regimes, restricted (SLU-norm) and semi ad libitum, was also included in the study. At birth, pigs (n=206) were randomly allocated to the two treatment groups; surgically castrated and vaccination.

Syftet med examensarbetet var att mot pedagogers praktiska erfarenheter och professionella praktik pröva olika teorier kring risk- och skyddsfaktorer vid utagerande och internaliserande beteendeproblem hos barn och unga samt beteendeproblemens koppling till läsförmåga för att se hur teorierna fungerar i relation till praktiken. Studien är kvalitativ och datainsamlingsmetoder har varit semistrukturerade intervjuer och kompletterande enkäter med sammanlagt tio informanter. Dataanalysen har inspirerats av en fenomenografisk metodansats i de första analysstegen. Resultatet visar bland annat att informanterna har erfarenheter och uppfattningar av att barns/elevers beteendeproblem dels kan handla om förmågor och färdigheter hos individen själv, exempelvis bristande kommunikativ förmåga eller svag självkänsla, dels att faktorer i hemmiljön och/eller förskolan/skolan verkar hindrande för barnets/elevens utveckling och lärande. Framför allt visar materialet att lärarens relation till barnet/eleven och föräldrarna har stor betydelse för utgången av beteendet.

In this paper the rate of convergence, speed of execution and symplectic properties of the time-integrators Leap-Frog (LF2), fourth order Runge-Kutta(RK4) and Crank-Nicholson (CN2) have been studied. This was done by solving the one-dimensional model for a particle in a box (Dirichlet-conditions). The results show that RK4 is the fastest in achieving higher tolerances, while CN2 is the fastest in achieving lower tolerances. Fourth order corrections of LF (LF4)and CN (CN4) were also studied, though these showed no improvements overLF2 and CN2. All methods were shown to exhibit symplectic behavior..

This essay analyzes the market for entertainment software by identifying and explain the products typical properties, in addition i clarifies the behavior of consumers and producers. One of the most important property related to software is the ease with which it can be reproduced. When such reproduction is done illicit it´s called piracy. The software industry often claims that piracy leads to big losses for the companies as well as in welfare, the essay clarifies that this doesn´t has to be the case. On the contrary the possibility to cheap production and distribution may lead to an increased welfare.

Native spider silk is an attractive lightweight natural polymeric material with a unique combination of strength, extendibility and flexibility. Synthetic, recombinant spider silk is an attractive biomaterial with several possible fields of application. When a foreign material is introduced to blood, this can for example cause unwanted coagulation and complement activation. The aim of this study was to investigate if coatings of heparin or albumin could improve the blood compatibility of films of recombinant spider silk and to develop an initial method to do so. Hypothetically, objects like pacemakers, stents and dental implants could be covered with spider silk films of high blood compatibility to reduce potentially harmful foreign body reactions caused by the immune defense. Increased blood compatibility would likely lead to improvements for both the individual patients and the society thanks to reduced load on healthcare institutions. Our objective was to assess the blood compatibility of both functionalized and non-functionalized recombinant spider silk by evaluating coagulation and activation of the complement system of the immune defense. Coagulation was evaluated visually on glass slides and complement activation was analyzed by measuring the concentration of the complement system mediator C3a in blood samples that had been exposed to the different materials. This study introduces a non-toxic and easy performed method of improving the blood compatibility of recombinant spider silk films by adding a heparin coating. Heparin coated surfaces had statistically significantly higher blood compatibility than uncoated surfaces. The effects of albumin coating of films were less clear compared to the results of heparin coated films. Complement activation could not be evaluated because of high activation in all samples prior contact with the materials that were included in the study..

Denna kvalitativ intervjustudie, söker en förståelse kring fenomenet sex som självskadebeteende. Självskadebeteende har studerats och definierats, men sex som ett självskadebeteende är inte inkluderat som ett begrepp i dessa vetenskapliga studier (Zetterqvist, 2014; Nock, 2014; Klonsky 2009). Däremot har psykologer, organisationer och andra professionella tolkat och definierat fenomenet som att det existerar (Sjöström, 2012; Landgren 2015; Jonsson och Mattson, 2013; Tjejouren 2015; MUCF, 2013). Genom intervjuer med tre olika personer som kommer i kontakt med sex som självskadebeteende, kombinerat med tidigare forskning, visar denna studie att sex kan användas som självskadebeteende och att det görs i syfte att hantera (coping) ångest och andra negativa känslor. Tidigare trauman och/eller en dysfunktionell familjedynamik kan leda till att en individ utvecklar icke fungerande strategier för att hantera potentiella dåliga känslor. Individerna vänder sig till sexuella destruktiva beteenden som en affektregleringstrategi.

Konsumentbeteende handlar om när, varför, hur och var människor gör ett inköp av en vissprodukt. Konsumenternas demografiska profiler är ett viktigt område inomkonsumentbeteende. När det kommer till frågan om shopping så förknippas ordet i stort settmed kvinnor. Samtidigt beskrivs ofta manligt konsumentbeteende från ett traditionelltperspektiv och skiljer sig från det kvinnliga köpbeteendet. De traditionella stereotyperna förmanligt konsumentbeteende är att män är mer benägna att ta risker när de handlar eftersom deinte brukar fråga personalen om hjälp eller åsikt, de jämför inte olika alternativ med varandra,de brukar inte planerar sina inköp, de är inte villiga att handla i grupp och är ?rädda? för atthandla i kvinnliga butiker.Eftersom könsrollerna kan ändras över tid är det viktigt att inom marknadsföring undersökakring dessa ämnen och inte ta de stereotypa könsrollerna förgivet.

When a car owner want to lock or unlock his or her car today, it?s preferable done by using aremote control. The system is really comfortable when the car owner is using the remote.A problem arises if a thief gets the remote.The thief doesn?t have to know where the car is parked, an approximate estimation where thecar is parked is enough.For instance, it?s enough to know which car park the car is parked in. If the thief knows that,he/she can repeatedly activate the remote control while looking for a car indicating with lightsand sounds.Because of the fact that a car usually indicates that it has been unlocked by making a shortsound indication, there will be no problem finding the car.The purpose with this project is to make a prototype which makes it harder for a thief to findthe car.

Sewage sludge contains plant nutrients and has earlier been utilised as fertilizer to cropland. Unfortunately not only plant nutrients but also heavy metals, pathogens and organic contaminants tend to accumulate in sludge. The suitability to use sewage sludge in agriculture has therefore been subject to several discussions over the years. The Swedish food industry does no longer accept sludge as fertiliser for Swedish producers. In 1999 the Swedish parliament accepted several objectives for environmental protection. In order to prevent environmental pollution and further exploitation of the earth crust, one of these objectives confirm that phosphorous from sewage shall be recirculated to arable land.

Today the individual ventilated cage system (IVC-system) is the most commonly used system when housing rodents. IVC systems are designed to control both supply and exhausted air at cage level, as well as temperature and relative humidity in the cages. This creates an optimal environment for the mouse and at the same time a protection against the risk of cross-infection between cages and the outside environment. The aim of this study was to evaluate the health and welfare for two different strains of laboratory mice (NMRI nude mice and C57BL/6NCrl mice) in three different kinds of IVC-systems; Arrowmight, Allentown and Tecniplast. 108 mouse pups from each strain (in total 216 mice) were selected after weaning at an age of three weeks and tested during 5 weeks.

The aim of this essay is to get a deeper understanding of a teachers' profession and to get knowledge of how earlier experiences can influence you as a teacher. I have interviewed a female teacher, Pia to get this understanding. As a tool to get the teacher's whole story I used the life story method. In her profession she is influenced by her own importance of security as a child.Her own needs of security has given her an deeper understanding for pupils like herself during the childhood; insecure and afraid. Her understanding for all kinds of behavior among the children has increased by her own experiences.The story shows that Pia is frustrated by the fact that she can't control her own working time.

The report aims to describe the austenitic stainless steel Sanicro 25 from a thermomechanical point of view. The thermal and mechanical properties of the material make it suitable for use in coal ? and thermal power plants. By the use of Sanicro 25 it would be possible to bring the efficiency of these plants up while bringing the carbon emissions down.A material model is created from material testing and validated through simulation in the finite element software Abaqus. The model that has been derived describes the material behavior during loading and stress relaxation for the first cycle in a thermomechanical fatigue test well.

This report concentrates on why more people do not choose an environmentally friendly car instead of a conventional car. To find this answer we have used theories that include decision - behavior and environment - philosophy. We have also made four surveys, which includes several interviews. The results of these interviews, together with the secondary data we have found, have been analyzed against the theories made by our choice. We have found that the stimulus that we have today isn?t enough to make more people choose an environmentally friendly car instead of a conventional car.

Research shows that almost 30 per cent men and 20 per cent women at the age of 16-24 in Sweden download music on a regular basis instead of buying records. Thanks to modern technologies teenagers of today have become used to downloading music illegally from theInternet. Even though legal alternatives, such as Spotify, have become popular, the behavior of illegal download of music still persists. What do record companies do to prevent this phenomenon and why do they go to such length to stop this widespread movement? The question is, why is illegal download of music a problem ? and for whom? To investigate this I?ve read books about the subject, analyzed web pages of alternative record companies and interviewed a drummer in a local band.

To understand students, their world and what makes them act in a certain way or how they form groups in school is a very important part of a teachers work. You get a better understanding for the students behavior by having knowledge about how they look uponthemselves and other students, to prevent prejudice and tendenses to bullying and beeing an ?outsider?. Clothes and fashion are often a big part of the students identity buliding and how they look upon themselves and get looked at by others.We have chosed to exeminate this phenomenon among girls since they are often more exposed by the media for example and with unreasonable beautyideals and other external factors that many girls try to live up to in todays society.We have made a survey regarding the usage of clothes and fashion in the making of an identety with totally fiftyeight girls in the ninth grade on two different public schools in Haninge and Tyresö municipality..