by R.T. Phillips (1994)
The NATO Advanced Research Workshop on Coherent Optical Processes in Semiconductors was held in Cambridge, England on August 11-14,1993. The idea of holding this Workshop grew from the recent upsurge in activity on coherent transient effects in semiconductors. The development of this field reflects advances in both light sources and the quality of semiconductor structures, such that tunable optical pulses are now routinely available whose duration is shorter than the dephasing time for excitonic states in quantum wells. It was therefore no surprise to the organisers that as the programme developed, there emerged a heavy emphasis on time-resolved four-wave mixing, particularly in quantum wells. Nevertheless, other issues concerned with coherent effects ensured that several papers on related problems contributed some variety. The topics discussed at the workshop centred on what is a rather new field of study, and benefited enormously by having participants representing many of the principal groups working in this area. Several themes emerged through the invited contributions at the Workshop. One important development has been the careful examination of the two-level model of excitonic effects; a model which has been remarkably successful despite the expected complexities arising from the semiconductor band structure. Indeed, modest extensions to the two level model have been able to offer a useful account for some of the complicated polarisation dependence of four-wave mixing signals from GaAs quantum wells. This work clearly is leading to an improved understanding of excitons in confined systems.
Kimmett Edgar, Ian O'Donnell, and Carol Martin
This book brings an original approach to the problem of violence between prisoners. Building on research in prison over five years which included surveys of 2,000 prisoners. The authors argue that a conflict-centred approach provides a promising foundation for the design of safer prisons.
Simon Oliver, writer
"John Constantine is back in London, reuniting with old friends--and older enemies: There's Chas Chandler, his best mate; Mercury, the young psychic, the Earth elemental known as the Swamp Thing; and, of course, more demons and djinns than you can cast a curse at. If he's going to survive this hell-raising homecoming, Constantine will have to play fast and loose with the rules--and with the souls of everyone residing in the Old Smoke. Evil is a surprisingly common infection, but sometimes the cure is worse than the disease"--
Georgia Byng
Molly Moon es una niña huérfana, como todos los niños que viven en el horrible orfanato Hardwick House. Pero Molly es diferente: es fea y delgaducha, y sólo tiene un amigo, Rocky. El resto de los niños la odian y se meten con ella. Incluso la señorita Adderstone, la directora del orfanato, y la cocinera, Edna, siempre la están castigando. El único sitio donde Molly es mínimamente feliz es en la biblioteca, donde se pasa las horas muertas leyendo. Un día, discute con su amigo Rocky, y se refugia en la biblioteca, donde descubre un libro de hipnotismo. Un tal profesor Nockman, del museo de Chicago, parece estar muy interesado en ese libro, a tenor de la regañina que echa a la bibliotecaria por haberlo perdido. Molly se sale con la suya y roba el libro. A partir de ese día decide que su vida va a cambiar.
Keith Laumer
Description from [goodreads][1]: > When Legion meets a strange old millionaire called “Foster,” he doesn't know that his whole life will never be the same again. For “Foster” has a strange story to tell. Part of his story is contained in his diary, which not only describes things in the very recent past, but goes back for centuries. . . > > Foster has hired Legion to help him regain his lost memory. Then both men are suddenly attacked by alien powers. They flee to Stonehenge in England where they discover a strange control chamber deep in the ruins. > > They succeed in bringing down to earth an alien space ship which has been in orbit for thousands of years. Eventually they both become captives. . . on another planet. [1]: