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Genom att minska mängden planktivor och bottenlevande fisk (reduktionsfiske eller biomanipulation) kan vattenkvalitén och den ekologiska statusen i övergödda sjöar förbättras. Om metoden utförs effektivt ger den positiva effekter på siktdjup, algmängd samt biodiversitet vilket ökar möjligheterna för rekreation och dricksvatten. En viktig upptäckt vid reduktionsfisken är att bottenlevande fisk har Biomanipulation, i.e. to reduced planktivorous- and benthivorous fish in order to receive changes in the trophic structure has been a successful method to improve water quality and the ecological status in eutrophic lakes. The initial idea was to increase the abundance of large zooplankton and thus to cause a trophic cascade with reduced algal biomass. Many studies failed to observe an increase of

The number of companies in Sweden has shown a significant increase over the last five years (www.bolagsverket.se). Data about these companies is an important asset for the customer relationship management market. In most business areas, users are in search for new customers. Companies, such as Lundalogik AB, provide a service, where the analysts can look for customers in an interactive environment

Examensarbetets syfte är att undersöka yrkesarbetares medvetenhetsnivå kring olyckor på arbetsplatser, personlig inställning till medvetet och omedvetet risktagande samt förebyggande av arbetsmiljöskador. Studien skall ge en indikation om vilka de bakomliggande faktorerna är till att yrkesarbetare tar risker i arbetslivet. Undersökning kommer också inrikta sig på att undersöka om det finns några tThe purpose of the master thesis is to investigate the workers level of awareness of accidents on the work place, personal attitude towards known and unknown risks and how to avoid them. The study will give an indication of the root causes of the risks the workers are taking at the construction site. The study will also research if there are any clear correlations between endangerment and age, gen

In a time where peer-to-peer networks, often with previously unconnected devices, are increasing in relevance, new storage solutions are needed. Storage can no longer rely on a single central entity but rather needs to depend on the resources of the entire network. Such a solution is the distributed hash table (DHT) which allows distributed storage of resources, ensuring redundancy and availabilit

Encapsulation systems have long been studied, and the designs have varied in both capsule material as well as the type of cargo. The intended use have ranged from nanoreactors to delivery systems. This work presents an encapsulation system consisting of protein capsule and a protein cargo. The capsule is a redesigned hepatitis B virus capsid protein, in which the luminal extension has been altered

Förbättring av ett ärendehanteringssystem som ett företag använder.

Inversions have the capacity to maintain genetic differentiation between hybridizing populations, which makes them highly interesting targets for understanding the processes of early speciation. In-versions can generate “islands of differentiation”, genomic peaks of heightened divergence, by lower-ing recombination in heterozygotes. Two genetically similar and hybridizing subspecies of the willow

An extensive part of the road network in Sweden still consists of gravel roads, but operation and maintenance of these roads is complex due to the Swedish climate and the low traffic volume. This report further examines how operation and maintenance of gravel roads is executed and how it can be done in a cost effective way. In order to do so, the report contains both a literature study and a field

This thesis presents a finite element solution to the problem of swelling inclusions inside a host matrix. The FE simulations aim to mimic the behaviour of hydrides nucleating and growing inside a zirconium body with a heat expansion analogy, this is done with both a multi-step and single step technique carried out in the commercial FE software ABAQUS. The model mesh was generated with a Python sc

Syfte: Syftet med studien är att analysera hur ett framgångsrikt ombyggnadsprojekt för flerbostadshus från 1950-talet ser ut och om det finns generella faktorer som går att applicera på andra projekt. Vidare är det tänkt att studien ska belysa hur utvärderingen av projekt idag genomförs och om det finns andra variabler som borde utvärderas jämfört med vad som görs i nuläget. Slutligen ska studien Purpose: The purpose of this study is to analyze if there are any critical success factors in renovation projects from the 1950’s in Sweden, and if they can be applied to more general construction projects. Furthermore, the study will examine how these projects are evaluated and if a wider evaluation process is needed. Finally, the study will examine how the workplace affects the residents during

The aim is to specify a demand function that describes the demand for cannabis on county level in the states that have legalized retail sales in order to test hypotheses regarding what factors influence demand on county and potentially on individual level, as well as to gain some insight in whether legalization is a good strategy for combatting black markets of cannabis. Multiple regression analys

This study investigates the relation between preferences and cognitive effort in decision making tasks in a natural setting. Does the way a supermarket’s shelves are organized affect how easy it is to choose what items to purchase? Does it affect the quality of our choice? The eye-movements of participants were recorded during their regular shopping trips in two supermarkets with different shelf

This paper is a proposition of how to use an archetypal analysis based on new theoretical concepts of the Jungian archetypes, such as the image schema (Knox, 2001), the bi-polarity of complexes (Perry, 1970), and the culture complex (Singer, 2006). Consequently, these are combined with the cognitive schema theory, cues and the cultural frame switch theory. Furthermore, these theories are connected

Consistent differences in behavior between individuals within a population can contribute to community and system complexity by adding alternate trophic linkages and maintaining diversity. Past studies have examined individual differences in behavior as well as the occurrence of cannibalism within populations, but not the link between predator behavioral type and cannibalism. Individual Eurasian p

The aim of my study is to find out how Peru's recently signed free trade agreements have affected the volume of imports of fishmeal by the partner countries.

As the consumption of footwear increases, so does the footwear waste. At the same time there is an increased interest to find solutions to close loop channels and adopt circularity of material flow. However, in order to create such circularity it means to overcome the typical barriers to such implementation, which usually are addressed by networking between actors, efficient reprocessing technique

My topic is to make "playful" products. However, "playful" may have a broad meaning. I think nowadays people treat furniture and products as purely functional or aesthetic tools rather than a surrounding which may have more interaction with human actions or even have its own personalities. In another word, I'm interested in exploring how our surroundings can integrate more

Att undersöka om en aktiesplit förändrar svenska bolags ägarstruktur samt att förklara och analysera en eventuell förändring. Vidare ämnar uppsatsen att jämföra resultatet på den svenska marknaden med en tidigare amerikansk studie. Resultatet visade på en ökning av totala antalet aktieägare i företag som har utfört en aktiesplit. Ingen förändring i ägarproportioner efter en aktiesplit kunde påvi