Relationship between X-ray and ultraviolet emission in 3C 273

In 3C 273, ultraviolet flux and X-ray flux measured by BATSE are not well correlated, contrarily to predictions of several models, unless the X-ray flux lags the UV emission by 1.75 yr. The absence of observed correlation at small lag cannot be due to spectral variability. A Comptonizing corona model is however compatible with all UV and X-ray observations covering the BATSE period.Comment: LaTeX, 4 pages, 6 figures. espcrc2.sty style file included. Poster contribution to the symposium "The Active X-ray Sky: Results from BepppoSAX and Rossi-XTE", Rome, October 199

Impacts of information technology (IT) outsourcing on organizational performance: A firm-level empirical analysis

There is a wealth of knowledge linking Information and Communications Technologies (ICTs) to human development, but Africa’s leaders have not used it well to develop its human capital. The continent has the lowest global levels of ICT diffusion and human development. This paper proposes a way of developing Africa’s vital access to knowledge through ICT, by reviewing and using the human development record of South Africa to develop a research framework for a human development – based ICT development strategy. The framework comprises a research-based bottom-up participative action program that responds directly to the specific information needs of the country’s socioeconomically marginalized communities, the so-called “Bottom of the Pyramid” (BOP), by ensuring their maximum participation in the research and development process. The proposed framework draws liberally from the vast accumulated knowledge about human development and its principal tool, the ICTs, especially from Asia where similar development activities are delivering impressive results. The multi-cultural and multi-lingual characteristic of South African society, including its recent sociopolitical history, presents numerous challenges for balanced human development, but also unique opportunities to build an effective model for improving the usefulness of ICTs for human development in the country and by extension, in Africa as a whol

Test of the proximity theorem for deformed nuclei

We compare a proximity-type potential for two interacting nuclei with the double-folding method. Both spherical and deformed systems are considered. Special "orientation windows" are found for two deformed nuclei giving rise to nuclear cohesion. If the same nucleon-nucleon interaction is utilized, the proximity and the double-folding potentials agree fairly well for a spherical + deformed system. However, deviations are found in the case of two deformed nuclei