. National Cancer Institute, Frederick Cancer Research and Development Center, Laboratory of Mathematical Biology, P. O. Box B, Frederick, MD 21701. Internet addresses: toms@ncifcrf.gov and stephens@ncifcrf.gov. y corresponding author 1 2. The order of predominance of the residues at every position. 3

, we review the "Grid problem," which we define as flexible, secure, coordinated resource sharing among dynamic collections of individuals, institutions, and resources-what we refer to as virtual organizations. In such settings, we encounter unique authentication, authorization, resource

The purpose of this project is to examine the role that Mathematics plays as “gatekeeper ” to the successful (or unsuccessful) completion of a college degree and to determine whether patterns of course selection impact retention and graduation. The variables to be collected in the study include demographics (race, gender, age), admission values (high school gpa, ACT scores, SAT scores), transcript information (courses, grades, and declared major) over a 6-year period. The final variable to be collected is whether the student graduates during the period under study. The database contains over 50,000 student records, and over 300,000 enrollment records. Traditional statistical methods are inadequate to handle such a large database. These techniques must be supplemented by data mining tools. The database must be investigated using the data mining process. Whereas statisticians were content to use logistic regression to identify those at higher risk of dropping out, data miners want to be able to predict accurately the sub-group of students who will not continue, and to prioritize the sub-group for interventions to increase the retention of this sub-group. The project will adapt methods used in the retail industry to examine the problem of “churn”, or customers switching to another company for goods and services. The customers at the greatest risk of leaving are clearly identified so that an intervention can be used to

Running title: Age-Period-Cohort analysis for obesity prevalence in France Address for correspondence:

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. Using NCES data, Ms. Kim plans to use hierarchical non-linear modeling to analyze not only borrowers ’ success in attaining degrees (of which some has been written), but the little known impact of interaction effects between students ’ race and SES – and how this pattern varies by institutions

The findings, interpretations, and conclusions expressed in this paper are entirely those of the author(s) and should not be attributed in any manner to the World Bank, to its affiliated organizations, or to members of its Board of Executive Directors or the countries they represent. The World Bank

SFI Working Papers contain accounts of scientific work of the author(s) and do not necessarily represent the views of the Santa Fe Institute. We accept papers intended for publication in peer-reviewed journals or proceedings volumes, but not papers that have already appeared in print. Except

SFI Working Papers contain accounts of scientific work of the author(s) and do not necessarily represent the views of the Santa Fe Institute. We accept papers intended for publication in peer-reviewed journals or proceedings volumes, but not papers that have already appeared in print. Except

The World Wide Web is revolutionizing the way that researchers access scientific information. Articles are increasingly being made available on the homepages of authors or institutions, at journal Web sites, or in online archives. However, scientific information on the Web is largely disorganized