The 21 essays in this two-part book provide conceptual and operational understanding of the nature of models as representations of reality and as tools for description, analysis, interpretation, and forecasting. Topic areas addressed in part 1 (concept) include: the nature of models; the earth as a system; the determination of form; some…

Intended as a review of the state of the art and future trends of computer-based learning materials (CBLM), this document has been written for use by individuals of various constituencies including institutional users, CBLM planners, and state and federal level administrators. Among the major themes concerning CBLM are: (1) its diversity and…