Under predation risk, a trade-off between the need for safety and foraging opportunity occurs. Fish have been shown to adopt several behavioural strategies in order to reduce the risk of being attacked by a predator. In order to deeper investigate this phenomenon, in the present study common roach (Rutilus rutilus) behavioural personalities have been assessed under laboratory conditions and in the

In this master thesis a temporal model of the dynamics between virus and the immune system during a HRV infection was developed. The model was utilized to achieve numerical estimates for parameters governing the mechanisms in the immune system. Through a sensitivity analysis the interplay between different cells in the model was examined. The reliability of the parameter estimates were evaluated t

Den här studien har undersökt hur den formella och informella kommunikationen sker i ett aktivitetsbaserat kontor samt vilken roll digitala verktyg har i ett aktivitetsbaserat kontor, vilket i sin tur påverkar internkommunikationen. Med ett hermeneutiskt förhållningssätt har elva kvalitativa intervjuer med medarbetare från olika avdelningar på ett svenskt telekombolag genomförts. Resultatet visar

Considerable attention has been devoted to assessing the biological consequences of global warming during the past decades. Phenological events in plants, especially onset of flowering, has generally been observed to advance with rising temperature. However, phenology research is often restricted to short time periods because of limited data availability. Collection of flowering data from herbariu

Thailand ranks not only among the world’s most unequal societies but is also a unique case regarding political instability. Along many recent legitimacy crises, contributing to the country’s instability, it turned out that Thailand mostly lacks specific support for regime institutions, as diffuse support for the national community is rather stable. This study intends to bridge a gap in the literat

Oslo has until now been divided into the west and east, separated by categories of economic and social class as well as a physical barrier, the river, Akerselva. The west predominantly represents people of middle to upper class, whereas the east represents the middle to lower class people. This division has been formed throughout history, as the river that separates Oslo has been home to industry,

There is a need of developing methods for evaluating material parameters for peat. It is hard and costly to obtain undisturbed samples for laboratory testing of the peat. Therefore, in this thesis the possibility of using in situ measurements of the shear wave velocity for first order estimates of the consolidation parameters has been investigated. In earlier work, relationships have been found be

In this paper, it is investigated whether High-Frequency Trading has an impact on the stock market predictability or not, using nine different Autoregressive moving average models forecasts are generated. Thenceforth, ordinary least squares are used to regress the variance of the forecasting errors with High-Frequency Trading as an explanatory variable in order to see if it has any form of impact.

The way how retirement is organized in a society is linked to multiple basic social processes such as the evolution of family ties, migration or inheritance. Intra-familial care and charity dominate our view of retirement in the pre-industrial past, while commercial arrangements hardly play a role. This thesis delivers a case study on how the commercial retirement home of St. Catherine’s Hospital

This thesis has sought to understand what has governed China’s behavior towards North Korea along with what keeps China aligned with North Korea, how the US is influencing Sino-North Korean relations and if China has been increasingly critical of North Korea in the light of its nuclear tests in 2006, 2009, 2013, 2016, 2017, the sinking of the Cheonan and the shelling of Yeonpyeong Island. A theore

This thesis explores whether and how rural-to-urban migration alters the Chinese migrant family in the case of divided rural households of 10 male migrant workers. The study relied on in-depth semi-structured interviews with married men, who are fathers, husbands and sons, and who are currently working on construction sites in Beijing. Drawing on Lusher & Robins’(2009) theory of masculinity, t

Tourism is an important income for regions, where souvenirs play an important part. As we are heading into a more creatively oriented tourism, visitors are encouraged to participate rather than merely observe. The current supply of static objects symbolized by the host region, do not necessarily fulfill the underlying purpose of a souvenir; helping you remember a special moment in your life. Memo

The tawny pipit (Anthus campestris) is a migrant bird adapted to dry, sandy habitats. In southern Sweden, land use changes have resulted in a reduction of suitable areas, affecting the birds’ population size. The SandLife Project was created with the goal to restore those sandy grasslands and improve local conditions to stimulate the recovery of biodiversity. In order to compare the current and th

Nowadays, European cities contain more than 70% of the population of the continent and are still growing. This growth tends to put pressure on the challenges that urban areas are already facing. The range of these challenges is wide, such challenges being social, environmental and economical. Air pollution, health issues, increasing heat, integration, social exclusion, loneliness or mobility probl

Competition over reproduction – how does it affect the DNA? Competition over what is often a scarce resource -reproduction, is a phenomenon widely studied in science. It is the ultimate endeavor for life, ensuring that an individual’s DNA is carried on to the next generation, preserving its footprint in the shape of a child. This is a very selfish enterprise for many organisms which becomes appar

The process of firms entering and exiting the market has since Schumpeter’s introduction of the concept of creative destruction been a subject of interest for economists aiming to determine what drives economic growth. However, limited availability of data has long been a hindrance to such ambitions and it is not until recent decades that empirical studies on the role of firm dynamics for economic

This paper uses a bivariate BEKK model to estimate volatility spillover effects between stock and bond markets for the Nordic countries Sweden, Denmark, Finland and Norway. Daily log returns between the years 2001 and 2018 are analyzed. No spillover effect from the bond to the stock market is found in any of the countries which is a result that is unusual compared to a large part of the preexistin

Förändringar av miljöförhållanden i två naturområden i Helsingborg Landskap förändras hela tiden och det sker många stora förändringar genom att vi brukar marken på olika sätt, som till exempel när vi odlar mat. Under det senaste århundradet har det skett många stora förändringar i jordbrukslandskapet, bland annat på grund av att man börjat använda konstgödsel, bekämpningsmedel och har utvecklat Since the 1800’s the agriculture has changed and intensified significantly, going from small scale farming to large homogenous arable landscapes with fewer grazing animals, more fertilizers and pesticides. In Sweden, this pattern of intensification has been very distinct, especially in Scania, which today is dominated by plains. This has left substantial changes in the surrounding ecosystems, affe

Sex matters! It is natural to ask questions about where the species of this planet come from and how they become what they are. As a matter of fact, development of new species is in process all the time. Somebody named this process speciation. Like language which enables us to guess where the people might come from, some traits make it possible to recognize the individuals from the same populatio

Diel vertical migration (DVM) is performed by various zooplankton taxa. The general movement pattern of DVM has been well studied while the possible clonal differences of this movement largely remain unknown. My master thesis focus on investigating the effects of environmental stressors on Daphnia magna strains isolated from natural populations. Here I maintained 11 strains of Daphnia magna origin