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We examine thermal distortions of volume holograms recorded in (meth)acrylate photopolymers doped with SiO(2) or ZrO(2) nanoparticles. A holographic method is used to evaluate the temperature-induced Bragg-angle detuning of recorded volume holograms as a result of thermally induced refractive index and dimensional changes. It is found that the incorporation(More)
The export of arms belongs to the most contested issues in democracies. In this article, we examine the economic repercussions of the recent easing of the Japanese arms exports restrictions. We develop a rational expectations argument to understand why some political events increase the income of the arms manufacturers, while other ones reduce it or have no(More)
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