this paper studies the role of the conceptual models of the policy makers in the quality of prioritizing problems in the agenda setting stage of public policy cycle.  several factors contribute to perceiving problems, presenting clear definitions of them, prioritizing them and then problem setting in the format of agenda for policy makers. however, expecting to examine the theories of enactment...

In this paper, we argue that most current social information ltering approaches may bene t from more seriously taking into account the peculiarities of human cognition and human social behavior since current approaches only consider de-contextualized ratings. Social ltering systems exploit ratings provided by users in order to compute recommendations for other users. Typically, these ratings ar...

To explore the relation between mathematical models and reality, four different levels of reality are distinguished: observer-independent reality (to which there is no direct access), personal reality, social reality and mathematical/formal reality. The concepts of personal and social reality are strongly inspired by constructivist ideas. Mathematical reality is social as well, but constructed ...

One potential breakthrough application of real-time mobile device sensing data is the ability to effect changes in the social systems in real time. This data can come from devices that we carry with us anyway: our cell phones, our name tags, and other computing devices. As we have shown in previous work, by using this data in offline analysis we can use this information to not only identify soc...