Real-time dynamic holographic image storage device

A real-time dynamic holographic image storage device uses four-wave mixing in a pair of photorefractive crystals. An oscillation is produced between the crystals which can be maintained indefinitely after the initial object beam is discontinued. The object beam produces an interference pattern in a first crystal to produce phase-conjugated object beam which is directed towards the second crystal. In the second crystal another interference pattern is created which produces a reconstructed object beam. The reconstructed object beam is directed back towards the first crystal. The interference patterns are produced by interaction of the object and phase-conjugated object beam with a read and write beam in each of the crystals. By manipulation of the ratio of the read and write beam intensities in at least one of the crystals, the phase-conjugate or reconstructed object beam output therefrom can be amplified to maintain stable oscillation between the two crystals

Recent Performance of the Canadian Economy: A Regional View

This article first outlines the activities of the Bank's regional offices and looks at how regional economic analysis fits into the Bank's decision-making process. The changing role of the regional offices in communications and in information gathering is examined, focusing on the quarterly surveys of industries and associations. The second section reviews, from a regional perspective, economic developments since the Asian crisis and future prospects.

Sampling for quality inspection and correction: AOQL performance criteria

Probability

Making Poverty History? How Activists, Philanthropists, and the Public Are Changing Global Development

From August 1 to 3, 2007, fifty preeminent U.S. and international experts from government, business, academia, and the philanthropic and nonprofit sectors came together at the Aspen Institute to explore the changing contours of the global development community. By examining the common challenges development actors face -- promoting accountability, using resources effectively, and achieving scale and sustainability -- participants aimed to spur successful practices and establish foundations for collaboration among the expanding field of players determined to lift the lives of the world's poorest people

La politique socioculturelle de la transcription (ou de l’écrit) : la question du français louisianais

Dans la polémique qui sévit parmi les ethnologues, tant chez les Anglo-Américains que dans le monde francophone, sur la meilleure façon de transcrire les phénomènes dialectaux, les adversaires ont tantôt effectué sur leurs ethnotextes un travail de linguiste, tantôt collaboré avec des linguistes pour adapter les particularités du parler de leurs informateurs. Même si certains ont fait un effort admirable pour inclure autant d’informations contextuelles que possible (avec les pauses, les rires, les gestes et les réactions), la méthode ethnologique ne devrait pas errer entre la littérature et la linguistique. Cet exposé explorera la relation entre la linguistique et la transcription dans le monde francophone et surtout les efforts faits en Louisiane pour illustrer l’importance du passage de l’oral à l’écrit dans la culture d’une société, et pour dégager les bases d’un meilleur système