This is a survey paper on various weak systems of Feferman’s explicit mathematics and their proof theory. The strength of the systems considered in measured in terms of their provably terminating operations typically belonging to some natural classes of computational time or space complexity.

You need not look far to find a slew of articles, white papers, and research reports describing the vulnerability of voice over IP systems. VoIP systems are vulnerable, but currently, the threat of actual attack to these systems is moderate. New vulnerabilities are being reported at an accelerating rate, such as the one that recently affected Cisco’s Call Manager (http://www.techweb.com/wire/ s...

BACKGROUND Abuse of older people is a serious issue and is associated with an increased risk of morbidity and mortality, and professionals will encounter elderly victims of abuse in all areas of the health care system. An important health determinant is behavioral factors, including coping style, which will impact on how older people manage stress and maintain control in their lives, and thereb...