Firms’ derivative portfolios are largely unpredictable, in the sense that the previous year’s portfolio is a poor predictor of the current one. This unpredictability partly reflects a common corporate practice known as ‘selective hedging’, i.e. adjusting the timing and size of hedging programs bases on market views. In this paper I examine if corporate governance arrangements influence the extent

It is today commonplace that games and virtual worlds are not only multi-billion dollar businesses but also momentous socio-cultural phenomena that require critical attention. Massively Multiplayer On-line Games (MMOGs) are these days becoming recognized not only as grounds for play within ‘magic circles’ but also as complex and significant social spaces with 24-7 access to the millions of gamers

The use of Internet Protocol (IP) in the security industry is increasing but little is known about the relationship between end users and the merger of traditional physical security and IT otherwise referred to as convergence in the security trade press. Markus Lahtinen of the LUSAX project examines the growth of convergence in the security industry and discusses complexities of this relationship.

Popular Abstract in Swedish Datorsimuleringar, konsten att modellera verkliga eller tänkta händelser med hjälp av en dator och ett lämpligt simuleringsprogram, har blivit ett dominerande verktyg inom tekniska och naturvetenskapliga områden, likväl inom akademiska och industriella tillämpningar. Trots att experimentella studier har ett vedertaget erkännande inom diverse forskningsstudier har den snThis thesis concerns the study of Fluid-Structure interaction phenomena among deforming and (non-deforming) vibrating objects under unsteady fluid fl ow exposures. This multi-physical phenomenon is widely encountered in real-life situations and therefore it is of significant importance to understand the underlying physics. The trend is that both industrial and research facilities aim for developi

The present thesis reports on results from the fabrication technology development and the corresponding electrical transport measurements of low-dimensional semiconductor structures. The focus of the work has been directed towards two parts: the ballistic transport in nanostructure devices at room temperature, and the development of a charge-sensing technique for quantum dots (QD) in nanowires. B

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A virtual haptic-audio drawing program prototype designed for visually impaired children, has been gradually developed in a design-evaluation loop involving users in five stages. Four qualitative evaluations focused on recognizing drawn shapes and creati