作者：Niculescu, Marius F.; Whang, Seungjin
作者单位：University System of Georgia; Georgia Institute of Technology; Stanford University
摘要：Wireless telecommunications have become over time a ubiquitous tool that not only sustains our increasing need for flexibility and efficiency, but also provides new ways to access and experience both utilitarian and hedonic information goods and services. This paper explores the parallel market evolution of the two main categories of wireless services-voice and data-in leading technology markets, inspecting the differences and complex interactions between the associated adoption processes. We ...
作者：Currim, Faiz; Ram, Sudha
作者单位：University of Iowa; University of Arizona
摘要：From a database perspective, business constraints provide an accurate picture of the real world being modeled and help enforce data integrity. Typically, rules are gathered during requirements analysis and embedded in code during the implementation phase. We propose that the rules be explicitly modeled during conceptual design, and develop a framework for understanding and classifying spatiotemporal set-based (cardinality) constraints and an associated syntax. The constraint semantics are form...
