Cannibalism can have major influence on fish Population dynamics. A prerequisite for cannibalism is that the cannibal and the potential victim meet, and besides density effects, the encounter rate between cannibals and their victims is therefore also largely dependent on habitat use and habitat heterogeneity. In this study I quantified and compared the potential for cannibalism in stream-dwelling European grayling populations in three rivers in Jämtland by means of habitat classifications. I also analyzed population dynamic consequences of varying the potential for cannibalism in terms of intensity, using a physiological structured population model. Findings based on habitat characteristics were that the potential for cannibalism is in general not favourable in these types of streams.

Föreliggande studie bygger på kvalitativa intervjuer av fem pedagoger. Genom att intervjua pedagoger med utbildning i Human Dynamics, undersöker jag hur pedagoger arbetar praktisk med Human Dynamics med fokus på inlärningsprocessen. Jag undersöker även likheter och skillnader mellan Human Dynamics och Dunn och Dunns lärstilsmodell..

The purpose of this work is to create more knowledge about the teacher's perceptions of group dynamics and its impact on school activities. How do teachers opportunities and obstacles in order to influence group dynamics among students. The questions I have answered is how the teachers see the importance of a functioning group dynamics in school, how teachers work with group dynamics and how teachers describe the opportunities and obstacles for effective group dynamics. The method I am using at work is a qualitative research method that involves obtaining the teachers' own thoughts, feelings and experiences around the right questions. I have interviewed three teachers in primary schools in the county of Stockholm to find out their particular approach.

The wild boar Sus scrofa population in Sweden has increased rapidly in the last decades which has led to conflicts among stakeholders, for example due to crop damages in agriculture. Thus, there is an urgent need of quantified goals and effective strategies for wild boar management. To develop such strategies, knowledge on Population dynamics is fundamental. In this study a deterministic matrix model was used to estimate population growth, based on previously published data. The exponential growth rate for a wild boar population was calculated to 1.48.

Föreliggande studie bygger på kvalitativa intervjuer av fem pedagoger. Genom att intervjua pedagoger med utbildning i Human Dynamics, undersöker jag hur pedagoger arbetar praktisk med Human Dynamics med fokus på inlärningsprocessen. Jag undersöker även likheter och skillnader mellan Human Dynamics och Dunn och Dunns lärstilsmodell..

Examensarbetet ger läsaren en inblick i förhållningssättet och verktyget Human Dynamics. I arbetet jämförs annan forsknings syn på en gynnsam lärandemiljö för barn med koncentrationssvårigheter med Human Dynamics teori.Syftet har varit att undersöka om förhållningssättet är fördelaktigt för elever med koncentrationssvårigheter.Undersökningen, som är baserad på intervjuer med kvalitativ inriktning, visar exempel på hur pedagoger använder verktyget i praktiken samt hur de uppfattar barn med koncentrationssvårigheter och deras behov. Respondenterna är positiva till Human Dynamics och menar att förståelsen för olikheter och insikter om sig själv har hjälpt dem att se olika individers behov på ett annat sätt än tidigare.Slutsatsen är att Human Dynamics teori är förenlig med annan forskning och gynnsam för alla individer, men kunskapen löser inte alla svårigheter utan specialpedagogiska åtgärder är nödvändiga i vissa fall..

Biometri är en relativt ny säkerhetsmetod för datorsystem. Biometri används ofta för att ersätta eller kombineras med användarnamn och lösenord. Detta görs genom att mäta ett fysiologiskt attribut eller beteendeattribut hos användaren. Keystroke dynamics är en biometrisk metod vilken registrerar användarens sätt att skriva på tangentbordet. En stor mängd försök med keystroke dynamics har gjorts i tidigare arbeten.

Gotland is an island in the Baltic Sea where man has introduced roe deer. The last successful reintroduction was in the 1980s and is the base of the viable roe deer population of today.The aim of this study was to estimate the roe deer population density in 2012 and the species population dynamic since the time when studies on the population started. The result indicates a population size of 850 roe deer in 2012. There was no significant population dynamic, which may be due to insufficient data. The population occurs basically over the whole island but have not yet been established in all suitable areas.

Examensarbetet undersöker den nya versionen av affärssystemet Microsoft Dynamics AX R2 2012 och dess plattform Commerce Runtime och analyserar dessa ur perspektiven arkitektur och kommunikationsmöjligheter. Examensarbetet undersöker systemets arkitektur och implementerar tre metoder för att visa upp kommunikationen mellan komponenterna i systemet. Undersökningen avgränsar sig dock till de områden av systemet och plattformen som har med butikslösningen att göra. Undersökningen går hand i hand med implementationen. Implementeringen sker löpande under arbetet för att säkerställa att undersökningen stämmer.

The aim of this study has been to examine what students within the sport of skydiving think about their education and the social spirit of the community. The purpose of the study is thereby to answer the study's aim through the following questions; how does group dynamics and social solidarity work within the skydiving community, how do the students feel about group dynamics and social solidarity within the skydiving community, and what factors makes the students feel included or respectively excluded from the spirit of the togetherness?The theoretical part of the study focuses on group dynamics and groups overall. Further on earlier research within adventure sports and skydiving regarding group dynamics and community spirit is presented. My survey is based on 35 interviews with skydiving students.The result shows that the community spirit within skydiving sports is described by the students as very special, unique, and strong among the members.

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

This study had two different aims. The main aim was to investigate the dynamics and impact of African swine fever (ASF) on a farm in Uganda during a recent outbreak through a case study. The second aim was to estimate the presence of two important differential diagnoses of ASF: Classical swine fever (CSF) and Porcine Reproduction and Respiratory syndrome (PRRS).The field and laboratory based case study of the farm level dynamics of ASF virus during a recent outbreak (October-December 2010) on a farm in the district of Mityana, Uganda, was conducted, using interviews, ELISA and RT-PCR. The financial impact on the farm was also estimated. The impact of the outbreak was profound.

The objectives of this research were to determine whether the natural rattan resources in Sulawesi, Indonesia can cope with the strongly increased harvesting pressure that has occurred over the last centuries. I was furthermore looking for patterns in the rattan Population dynamics that might give a hint on how the harvesting system could be improved to ensure a maximum sustainable yield. To answer these questions, I developed an individual-based model to analyse the dynamics of rattan growth in connection with rattan harvests by locals to identify sustainable levels of rattan harvests around villages in Sulawesi, Indonesia. Scenarios with different harvesting intensities were run to compare the change in harvest amount. For a given harvesting pressure, scenarios with a high number of harvesters and a low harvesting frequency had the same effect as scenarios with high harvesting frequencies and a low number of harvesters.

This thesis of 15 hp has been implemented at Halmstad University, in collaboration with Saab Dynamics in Linköping. Saab Dynamics is a company operating in the defence industry where competition is tough. This necessitates new ways to increase efficiency in the company, which is the basis for this thesis. Saab Dynamics wants to introduce simulation driven design. Since Saab Dynamics engineers have little experience of simulation, required a user methodology with clear guidelines.

The task in this thesis is the steering of one of Saab Bofors Dynamics robots using Sliding Mode Control, a method they never used before. The robot constitutes a system which in addition to perturbations and uncertainties due to modeling imprecision, hold the difficulty of being highly time variant. In order to be able to keep required performance with uncertainties and modeling imprecision present, the use of robust control methods like Sliding Mode Control is necessary. SMC is based on the states of the system being forced to stay on or in the direct vicinity of a hyper plane in the state space which is chosen in a way that gives the system dynamics desired properties. Other advantages with sliding mode are reduced order dynamics on the switching surface and total insensitivity to some uncertainties and perturbations.