Dedicated to the memory of Dorrie Weiss.

Building support for delegation services into an identity federation system enhances its flexibility and scalability. Users may need to delegate all (or a subset) of their access rights or privileges to other parties in the system. However, the Liberty Alliance, an industry consortium that aims to build open standard-based specifications for identity federation systems, does not include delegat...

Capturing races or semeai are an important element of Go strategy and tactics. We extend previous work on semeai [1] by introducing a more general framework for analyzing semeai, based on the new concepts of conditional combinatorial games and liberty count games. We show how this framework encompasses earlier concepts such as plain liberty regions and plain eye regions. Furthermore, we discuss...

Internet usage has been growing significantly, and the issue of online privacy has become a correspondingly greater concern. Several recent surveys show that users’ concern about the privacy of their personal information reduces their use of electronic businesses and Internet services; furthermore, many users choose to provide false data in order to protect their real identities. Identity feder...

relationship between income inequality and health has been independently discovered several times by people who appeared not to know of each other's work. 1,2 When I first published on the subject 3 I too was unaware of Rodgers' paper 4 until George Davey Smith pointed it out to me. Rodgers introduced an income distribution term into his regressions simply to take account of the well-known curv...