Access to the Internet is an increasing problem in many areas of the world. As the popularity and usefulness of the Internet increases on a daily basis, lack of access to the technology is putting many groups at a disadvantage in terms of better education, better jobs and even in terms of higher levels of civic participation. However, creating a network infrastructure to serve outlying communities and sectors of the population is not straight-forward.

This book brings together all the aspects of the problem - technical, regulatory and economic - into one volume to provide a comprehensive...

Poly (ADP-ribose) polymerase (PARP), also termed poly (ADP-ribose) synthetase (PARS) is a nuclear enzyme with a wide range of functions, including regulation of DNA repair, cell differentiation, and gene expression. More than a decade after the identification of PARP-like enzymatic activities in mammalian cells, a novel role was proposed for this enzyme, mediating a suicidal mechanism triggered by DNA strand breakage. This hypothesis has since become a controversial centerpiece of the PARP field, with many experimental systems both confirming and extending the PARP suicide theory....

After a century of research, several lines of evidence now indicate that the ability of adenosine to directly control inflammatory cells has a major impact on the functions of the inflammatory and immune systems. Consequently, many promising therapeutic approaches are beginning to emerge that focus on the modulation of adenosine, including the development of compounds that interfere with the breakdown of adenosine, as well as specific agonists and antagonists of various adenosine subtypes. Some of these compounds have already entered clinical trials. While information on the role of adenosine...