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Secondary abnormal grain growth (SAGG) during sintering of barium titanate has been explained in terms of twin plane re-entrant edge (TPRE) growth mechanism by {111} double twin lamellae. But during sintering of Ti-excess barium titanate, {111} double twins lamellae are observed with out SAGG. In our group, Lin founded that when combine two different Ba/Ti ratio of powder to sintering above the eutectic temperature, the SAGG is observed in the interface between two different powders. Therefore, this thesis consists of three major researches: (a) {111} double twin, (b) Ba/Ti ratio, (c) liquid phase. In the experiment, we follow Lin¡¦s experiment to sinter the specimen contain with SAGG. And in this specimen, it can observe the specimen divided into three type of growth grain: (a) top surface with normal grain growth (NGG), (b) intermediate layer with abnormal grain growth (AGG), (c) bottom layer with secondary abnormal grain growth. It can all observed {111} double twin in these three different type of layer. This result confirmed that SAGG are not induced by TPRE growth mechanism. Then we used SEM/EDS to analysis the Ba/Ti ratio in the different type of grain growth layer. The Ba/Ti ratio in this analysis is not differing in NGG, AGG and SAGG. Therefore, we used OM, SEM, TEM to observe the grain boundary and triple grain junction in NGG, AGG and SAGG. It can observe that only the grain boundary and triple grain junction in SAGG are complete wetting. The experimental results shows that the grain growth behavior controlled by the liquid phase wetting degree.

<p>Syftet med den här magisteruppsatsen är att undersöka hur tillkännagivandet av företags-förvärv påverkar aktieavkastningen på ett uppköpande bolaget. Testet är begränsat till före-tag som enbart är listade på Stockholmsbörsen under perioden 1996 till 2005. För att testa onormal avkastning användes marknads modellen. Resultatet visade att tillkännagivandet av företagsförvärv har en signifikant effekt på avkastningen för aktien för det bolag som ska förvärva. Majoriteten av uppköpande bolag upplevde en negativ onormal avkastning under test perioden (100 dagar före tillkännagivandet och 100 dagar efter).</p> / <p>The purpose of this master’s thesis is to examine the effect a corporate takeover an-nouncement has on share prices for acquiring companies. The test will only involve com-panies listed on the Stockholm Stock Exchange during the period 1996 to 2005. To test the effect an announcement has, abnormal return for a period before and after the takeover announcement was calculated. The findings from the testing showed that takeover an-nouncements have a significantly impact on shareholder return. The majority of acquirers in the sample had negative average abnormal returns during the event period (100 days prior to the announcement and 100 day after).</p>

In this thesis we analyze the financial performance of Football clubs following an initial public offering (IPO). We conduct several analyses using time series stock data with a focus on finding evidence of long-run underperformance and IPO over/underpricing. To this end, we estimate cumulative abnormal returns (CAR) and Jensen’s Alpha. We also analyze coefficients such as beta to describe the volatility and the link football clubs’ stocks have to the general market. We look at historical events that may have affected the movement of stock prices and confirm this by benchmarking an index (STOXX index) compiled of a number of European football teams. Our results show that football clubs do in fact follow the clear pattern of other entities and sectors and previous research with regard to underperformance in the long run. We find that football clubs’ stocks are less volatile than the general market and have a low beta. With regards to over/underpricing, we only obtain data for a few football clubs. We find small signs of underpricing but are not able to confirm that this is statistical significant due to the size of our sample.

An unusually high level of inter- and intraspecific variability in spermatozoa has been well documented. However, recent evidence indicates that the level of variation within spermatozoa differs markedly across taxa. In particular, it appears that the variability in spermatozoa tends to decrease across species as the risk of sperm competition increases. In this thesis, I present a model that explains how variability in spermatozoa may arise due to errors made during the sperm production process. In doing so, I also provide an explanation for why variability in sperm traits tends to decrease as the level of sperm competition experienced by males of a given species increases. The model presented in this study provides a novel perspective on spermatozoa and their production. While many sperm traits are thought to be selected upon, I suggest that variability in spermatozoa may also be the result of evolutionary forces such as sperm competition. Variability in spermatozoa, then, can be adaptive and can represent an optimal reproductive strategy. / Thesis (Master, Biology) -- Queen's University, 2009-09-25 21:53:23.172

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Thesis (M.Sc. (Biochemistry))--Mahidol University, 1983.

Thesis (doctoral)--Universiteit van Amsterdam.

The primary objective of this thesis is to investigate the value implications of the mergers and acquisitions deals initiated by the firms from the CEE region. We examine the sample of the 203 M&A announcements made by the bidder firms from the two major economies in the region-Poland and Russia-over the period 2006-2016. We apply the event study methodology to investigate the effect of the M&A announcement on the wealth of the acquirers' shareholders. The results demonstrate that on average investors of the Polish acquirers receive positive short-term wealth effect, while the investors of the Russian firms lose in short-term value. Our empirical findings provide partial support for the positive wealth effect when acquirers target the strategically important asset. Our results hold after controlling for the number of firm and transaction-specific characteristics. JEL Classification G14, G32, G34 Keywords mergers and acquisitions, event study, bidder gains, shareholder wealth effects, Central and Eastern Europe Author's e-mail lukashova.a.v@gmail.com Supervisor's e-mail kocenda@fsv.cuni.cz