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The goal of this thesis is to answer the question: Will a special cash dividend announcement from a company on NASDAQ GS create abnormal returns? This thesis will therefore find and measure abnormal returns surrounding a special cash dividend announcement. This is done by performing an event study, following the market model, consisting of 96 announcements from companies listed on the Nasdaq GS. T
In this essay, I will examine what Origen of Alexandria believed about the resurrection of the body. Origen was condemned as a heretic at the Second Council of Constantinople in 553, one of the main reasons for this was that he was said to deny the physical resurrection of the body. Due to the condemnation of Origen, the work of copying his works was also stopped, with the result that many of Orig
Over recent decades, use of insecticides to protect plants from pests and harmful insects have increased manyfold. Neonicotinoid insecticides, such as Imidacloprid (IMI) acts as partial agonists on nicotinic acetylcholine receptors which are widely present in both the central and peripheral nervous system of insects. Pollinators like Eristalis tenax are frequently exposed to these pesticides but h
Background: Sweden has a long-standing tradition of youth-friendly services focusing on sexual, reproductive and mental health. Currently, they are mainly targeting and being used by girls and young women. Little is known about what motivates and prevents boys and young men from seeking out and utilising health services, including the youth clinics. This study therefore aimed to investigate factor
Detta arbete är en översättningsvetenskaplig analys som baseras på översättningen av ett utdrag ur Simon Winchesters Atlantic: A Vast Ocean of a Million Stories, utgiven 2010. Första delen utgörs av en inledning, där boken och författaren presenteras översiktligt. Andra delen består av en källtextanalys efter analysmodellen i Lennart Hellspong och Per Ledins Vägar genom texten (1997). Tredje delen
This thesis aims to understand copula theory and its application in measuring dependence, particularly in the context of the paper "Multivariate conditional versions of Spearman’s rho and related measures of tail dependence" by Schmid and Schmidt. We clarify certain statements and formulas in Schmid and Schmidt's work, explore the potential of the conditional version of Spearman'
Previous studies of the neural correlates of episodic memory formation have been limited because the design of experiments tended to restrict natural viewing behavior, and thus they overlooked the role of eye movements in memory formation. The goal of the present study is to offer new insights into understanding the neural mechanisms of episodic memory formation in naturalistic viewing at the leve
Arbetet presenterar en metod som uppskattar ljud så som en människa uppfattar det i ett rum. Metoden kan användas i exempelvis applikationer med augmented reality och brusreducering. Att kunna uppskatta ljud i ett ljudfält är en nödvändighet för många applikationer. I exempelvis aktivt brusreducerade hörlurar får man in en signal som man vill tysta genom att skicka ut en motsatt signal, som i teoThere are different ways of evaluating the sound pressure in a sound field. Doing so is an essential part of several applications, such as active sound control and voice analysis. One way of evaluating the sound pressure in a sound field is by measuring a few discrete points in the field, combined with an interpolation method to find the sound pressure for the remaining field. Recently, it has bee
The field of machine learning has advanced significantly in recent decades, and, at the same time, computational power has improved to the point where training large machine learning models, such as artificial neural networks, is now accessible. Consequently, there has been a rise in the use of these models within the financial sector, with some firms leveraging them to assist with investment deci
This research is concerned with the relation between racism and the notion of rurality. More specifically, it studies a formally defined rural area in France where the State relocated migrants between 2016 and 2019, placing them in a derelict military camp. By so doing, the study contributes to the ongoing debate whether the rural-urban dichotomy should be considered a sufficiently realistic or de
Japanese knotweed (Reynoutria japonica) is a problematic plant species that causes a lot of damage on anthropological constructions as well as ecosystems throughout Europe. Several attempts have been made to control this species, such as glyphosates, cutting/mowing, covering with geoweave and digging, so far with varying degrees of success. In recent times different techniques of heat treatment ha
Algae exhibit different strategies to avoid predation by zooplankton. In green algae, which are generally not known for being toxic, colony formation or a protective mucilage cover can be such defence mechanisms. This study investigates the predation defence of Microglena globulifera (Chlamydomonadales), a unicellular freshwater green alga, against the rotifer Brachionus calyciflorus. Rotifers gro
Vägen till helvetet är kantad av defekta humlor Pollination är avgörande både för grödor och vilda växter, men de senaste decennierna har antalet pollinatörer minskat, särskilt de viktiga humlorna. Humlor får avkomma på ett sätt som gör dem särskilt känsliga för inavel. Jag har prövat två metoder för att upptäcka inavel i två humlearter, mosshumla (Bombus muscorum) och haghumla (Bombus sylvarum),Bumblebees, a pollinator, are haplodiploid with single-locus complementary sex determination (sl-CSD) and as a consequence can give rise to diploid males. Diploid males have previously been found to be associated with high costs and multiple severe effects. Mostly studied on Bombus terrestris, a common species, the frequency of diploid males have been suggested as a measure of inbreeding and there
Human-mediated landscape alterations has led to habitat loss for many pollinator species, causing declines in both diversity and abundance. In addition to habitat loss, habitat fragmentation can reduce population connectivity and lead to declines in genetic diversity, the variation that enable adaptation to novel conditions. In spite of this, to which extent pollinator species have lost genetic di
The trade-off between current and future reproduction is universal and forms the basis of life-history theory. Brood size manipulations is one of the most common way to test this trade-off. Although the effect of brood size manipulation on immune response have been tested in many studies, little is known about baseline innate immune function. To fill this gap, I created three groups (enlarged, red
Organisms must aim to find suitable places to settle and reproduce, and this choice varies according to environmental and individual features. The choice of an adequate place can have crucial repercussions on the reproductive success and thus, animal fitness. In many species natal dispersal is a key process accounting for crucial implications for a species spatial distribution. Hence, natal disper
The sperm whale (Physeter macrocephalus) is a cosmopolitan species with a broad distribution that ranges from the tropics to the poles. Males are known to migrate between nutrient-rich high latitude waters and low latitude breeding grounds. In the North Atlantic, large males are found up to the southern limits of the ice edge. However, their seasonal distribution patterns remain poorly known in th
The creation of floral resources for pollinators, such as flower strips, is seen as a relevant and needed intervention but comes with both cost and an opportunity for farmers. It may be worth it if, for example, pollinators are attracted to pollinator-dependent crops and deliver crop pollination. Unfortunately, since pollinators are mobile organisms, the spatial distribution of crop pollination re
Bumblebees (Bombus terrestris) are central place foragers, that have been shown to use path integration based vectors to navigate their environment. They also have remarkable learning and memory abilities, and can readily learn different cues. Recently, a behavioural assay has been developed that allows for rigorous testing of these mechanisms in a laboratory setting. This thesis aimed to use this
