Modern information systems are becoming more and more socio-technical systems, namely systems composed of human (social) agents and software (technical) systems operating together in a common environment. The structure of such systems has to evolve dynamically in response to the changes of the environment. When new requirements are introduced, when an actor leaves the system or when a new actor...

Using secondary analysis of existing data from the Montreal Longitudinal Preschool Study (MLPS, Canada), we examine the basic influence of early behavioral change upon later peer affiliation at the end of elementary school. We also verify the reliable nature of the teacher-ratings, as a more cost-effective alternative to socio-metric measures. Key child variables and their sources include kinde...

An identification problem with no a priori separation of the variables into inputs and outputs and representation invariant approximation criterion is considered. The model class consists of linear time-invariant systems of bounded complexity and the approximation criterion is the minimum of a weighted 2-norm distance between the given time series and a time series that is consistent with the m...

Sara L. Eggers is a graduate student (e-mail: [email protected]), and Baruch Fischhoff is Professor of Social and Decision Sciences (e-mail: [email protected]), Department of Engineering and Public Policy, Carnegie Mellon University. This research was partially supported by the National Science Foundation (SBR95-9521914). The authors thank Elizabeth Casman, Julie Downs, Paul Fischbeck, Theresa Mu...