Subsequences and Supersequences of Strings

Stringology - the study of strings - is a branch of algorithmics which been the sub-ject of mounting interest in recent years. Very recently, two books [M. Crochemore and W. Rytter, Text Algorithms, Oxford University Press, 1995] and [G. Stephen, String Searching Algorithms, World Scientific, 1994] have been published on the subject and at least two others are known to be in preparation. Problems on strings arise in information retrieval, version control, automatic spelling correction, and many other domains. However the greatest motivation for recent work in stringology has come from the field of molecular biology. String problems occur, for example, in genetic sequence construction, genetic sequence comparison, and phylogenetic tree construction. In this thesis we study a variety of string problems from a theoretical perspective. In particular, we focus on problems involving subsequences and supersequences of strings

The mechanism of ethylene epoxidation

The chemisorption of oxygen on Ag catalysts for ethylene epoxidn., as well as the reactivity of ethylene oxide on the Ag surface are discussed in this review with 161 ref

Praying together:corporate prayer and shared situations

In this article, we give much needed attention to the nature and value of corporate prayer by drawing together insights from theology, philosophy, and psychology. First, we explain what it is that distinguishes corporate from private prayer by drawing on the psychological literature on joint attention and the philosophical notion of shared situations. We suggest that what is central to corporate prayer is a “sense of sharedness,” which can be established through a variety of means—through bodily interactions or through certain environments. Second, we argue that corporate prayer, when understood as a kind of shared situation, enables common knowledge, as well as a kind of alignment between participants. Through this process, participants’ attention is focused on the same target and affiliation between participants increases. Thus, we suggest, one benefit of understanding corporate prayer as a shared situation is that it establishes and deepens a sense of community in such a way that common purposes and goals can be enacted more effectively