There's laughter in the air! Radio's top comedians and their best shows.

Mode of access: Internet.

Serviço de radiodifusão comunitária: metamorfose e singularidade

Este trabalho buscou compartilhar o debate sobre as metamorfoses e singularidades das rádios comunitárias e a utilização das Tecnologias de Informação e Comunicação (TICs) como linha de fuga capaz de desterritorializar a comunicação comunitária. Guattari, Deleuze e Negri foram os principais referenciais teóricos com que trabalhamos. Fizemos entrevistas com personagens vinculados ao serviço de radiodifusão comunitária no Rio de Janeiro. O cruzamento destes autores com as entrevistas e apreciação de outros materiais teóricos nos permitiu pensar as implicações do uso da internet como mais um meio para o serviço de radiodifusão ser transmitido. Sendo capaz de ampliar as idéias e experiências, podendo fazer parte da rede de produção colaborativa promovida pelo ciberespaço. O esboço deste estudo nos mostrou que a comunicação popular tende a ser encarada erradamente na esfera da ilegalidade, mas os benefícios e a aceitação da comunidade constituem a sua legitimidade. Os dados empíricos revelam que a Lei 9612/98 apesar de legalizar as rádios comunitárias tende exercer um papel castrador. Esta imagem nos leva a pensar o uso das ferramentas da internet como ação política capaz de contribuir para ser mais um espaço de atuação das rádios comunitárias, colaborando para democratização da comunicação.

Interviews with the past.

Contains music.

Radio - Players - Plays

De-Railed in Hollywood

Radio - Players - Plays

The Village Set

Radio - Players - Plays

A Venture in Crime

Radio - Players - Plays

There Was a Motive

Radio - Players - Plays

The King's Honor

Radio - Players - Plays

The King's Honor

Radio - Players - Plays

Eyes of the Soul - John Prosser, Sam Slade, Herschel Hart, Helen Colvin

Radio - Players - Plays

The Stampede

Hot gaseous coronae of early-type galaxies and their radio luminosity function

Recent X-ray observations have revealed that early-type galaxies (which usually produce extended double radio sources) generally have hot gaseous haloes extending up to approx102kpc1,2. Moreover, much of the cosmic X-ray background radiation is probably due to a hotter, but extremely tenuous, intergalactic medium (IGM)3. We have presented4–7 an analytical model for the propagation of relativistic beams from galactic nuclei, in which the beams' crossing of the pressure-matched interface between the IGM and the gaseous halo, plays an important role. The hotspots at the ends of the beams fade quickly when their advance becomes subsonic with respect to the IGM. This model has successfully predicted (for typical double radio sources) the observed8 current mean linear-size (approx2Dsime350 kpc)4,5, the observed8–11 decrease in linear-size with cosmological redshift4–6 and the slope of the linear-size versus radio luminosity10,12–14 relation6. We have also been able to predict the redshift-dependence of observed numbers and radio luminosities of giant radio galaxies7,15. Here, we extend this model to include the propagation of somewhat weaker beams. We show that the observed flattening of the local radio luminosity function (LRLF)16–20 for radio luminosity Papproximately 1024 W Hz-1 at 1 GHz can be explained without invoking ad hoc a corresponding break in the beam power function Phi(Lb), because the heads of the beams with Lb < 1025 W Hz-1 are decelerated to sonic velocity within the halo itself, which leads to a rapid decay of radio luminosity and a reduced contribution of these intrinsically weaker sources to the observed LRLF.

Rallying to a cause: the plays of Zakes Mda 1979-1989

Zakes Mda, dubbed one of South Africa's most prolific playwrights, produced his richest and most powerful theatre work during the 70s and 80s. Ironically, it is only in the 90s that he has been acknowledged in his own country as one of its foremost dramatists - ironic since he has recently moved away from drama into the realms of fiction. Fortunately Mda has accumulated a worthy canon of dramatic works, spanning radio and film, as well as theatre, and there is no reason to believe that he will not return to play writing. Mda has worked extensively in theatre in various capacities but most notably in the area of theatre-for-development. For example, he worked as director with Maratholi Travelling Theatre in Lesotho, an experience which contributed, in part, towards his book "When People Play People: Development Communication Through Theatre". Mda's plays have been produced in the United States, Britain, Spain, France and Russia as well as in southern Africa. "The Nun's Romantic Story" has been translated into Castilian and Catalan and "We Shall Sing for the Fatherland" and "Dark Voices Ring" have both been translated into Russian and French. In South Africa he won the Merit Award of the Amstel Playwright of the Year Society for "We Shall Sing for the Fatherland" in 1978 and in 1979 he was Amstel Playright of the Year for "The Hill". For his novel "She Plays with the Darkness", he won the Sanlam Literary Award in 1995.

HIF-1alpha role in oxygen-dependent radio- and chemosensitivity

Poor oxygenation (hypoxia) is a common characteristic of human solid tumours, and is associated with cell survival, metastasis and resistance to radio- and chemotherapies. Hypoxia-induced stabilisation of hypoxia-inducible factor-1α (HIF-1α) leads to changes in expression of various genes associated with growth, vascularisation and metabolism. However whether HIF-1α plays a causal role in promoting hypoxic resistance to antitumour therapies remains unclear. In this study we used pharmacological and genetic methods to investigate the HIF-1α contribution to radio- and chemoresistance in four cancer cell lines derived from cervical, breast, prostate and melanoma human tumours. Under normoxia or hypoxia (<0.2% or 0.5% oxygen) the cells were exposed to either a standard irradiation dose (6.2 Gy) or chemotherapeutic drug (cisplatin), and subsequent cell proliferation (after 7 days) was measured in terms of resazurin reduction. Oxygen-dependent radio- and chemosensitivity was evident in all wild type whereas it was reduced or abolished in HIF-1α (siRNA) knockdown cells. The effects of HIF-1α-modulating drugs (EDHB, CoCl2, deferoxamine to stabilise and R59949 to destabilise it) reflected both HIF-1α-dependent and independent mechanisms. Collectively the data show that HIF-1α played a causal role in our in vitro model of hypoxia-induced radioresistance whereas its contribution to oxygendependent sensitivity to cisplatin was less clear-cut. Although this behavior is likely to be conditioned by further biological and physical factors operating in vivo, it is consistent with the hypothesis that interventions directed at HIF-1α may improve the clinical effectiveness of tumour treatments.