Abstract — Modern society depends on the operations of civil infrastructure systems, such as transportation, energy, telecommunications and water. Clearly, disruption of any of these systems would present a significant detriment to daily living. However, these systems have become so interconnected, one relying on another, that disruption of one may lead to disruptions in all. The focus of this research is on developing techniques which can be used to respond to events that have the capability to impact interdependent infrastructure systems. As discussed in the paper, infrastructure interdependencies occur when, due to either geographical proximity or shared operations, an impact on one infrastructure system affects one or more other infrastructure systems. The approach is to model the salient elements of these systems and provide decision makers with a means to manipulate the set of models, i.e. a decision support system. 1

There is an explosion of community-generated multimedia content available online. In particular, Flickr constitutes a 200-million photo sharing system where users participate following a variety of social motivations and themes. Flickr groups are increasingly used to facilitate the explicit definition of communities sharing common interests, which translates into large amounts of content (e.g. pictures and associated tags) about specific subjects. However, to our knowledge, an in-depth analysis of user behavior in Flickr groups remains open, as does the existence of effective tools to find relevant groups. Using a sample of about 7 million userphotos and about 51000 Flickr groups, we present a novel statistical group analysis that highlights relevant patterns of photo-to-group sharing practices. Furthermore, we propose a novel topic-based representation model for groups, computed from aggregated group tags. Groups are represented as multinomial distributions over semantically meaningful latent topics learned via unsupervised probabilistic topic modeling. We show this representation to be useful for automatically discovering groups of groups and topic expertgroups, for designing new group-search strategies, and for obtaining new insights of the semantic structure of Flickr groups.

When surgery is performed on pregnant women for the sake of the fetus (MFS or maternal fetal surgery), it is often discussed in terms of the fetus alone. This usage exemplifies what philosophers call the fallacy of abstraction: considering a concept as if it were separable from another concept whose meaning is essentially related to it. In light of their potential separability, research on pregnant women raises the possibility of conflicts between the interests of the woman and those of the fetus. Such research should meet the requirement of equipoise, i.e., a state of genuine uncertainty about the risks and benefits of alternative interventions or noninterventions. While illustrating the fallacy of abstraction in discussions of MFS, we review the rationale for explicit acknowledgment of the essential tie between fetus and pregnant woman. Next we examine whether it is possible to meet the requirement of equipoise in research on MFS, focusing on a fetal condition called myelomeningocele. We show how issues related to equipoise in nonpregnant populations appear also in debates regarding MFS. We also examine evidence in support of claims that the requirement of equipoise has been satisfied with respect to "the fetal patient" while considering risks and benefits to gestating women only marginally or not at all. After delineating challenges and possibilities for equipoise in MFS research, we conclude with a suggestion for avoiding the fallacy of abstraction and achieving equipoise so that research on MFS may be ethically conducted.

Critical infrastructure systems provide services that are essential to both the economy and well-being of nations and their citizens. As documented in a recent report to the U.S. Congress (U.S. General Accounting Office, 2001), it is of vital importance that these services not be degraded, whether by willful acts such as terrorism or by natural or random events such as earthquakes, 166 Managing Disruptions to Critical Infrastructures design flaws, or human error. Yet infrastructure systems and the organizations that manage them are now recognized as components of highly coupled systems that increasingly rely on one another in order to deliver key services. In addition, as complex, interconnected systems, they are vulnerable to disruptive events that propagate from system to system. The September 11, 2001, attack on the World Trade Center in New York City illustrates the importance of understanding relationships among infrastructure systems and of managing these relationships in order to ensure continuance of necessary services after disruptive events. This research is

The first author became interested in proverbs and reframing because of parents who used proverbs but operated from different frames of reference. Retrospectively, it seems that father might have done more negative reframing and mother more positive reframing. Different portions of this study were presented earlier at various conventions [1, 2, 3].REFRAMING 2 Many proverbs seem to convey wisdom because they help people to reframe life’s predicaments. Positive reframes, such as Every cloud has a silver lining, often draw positive implications from adverse circumstances (cf. “positive reappraisals, ” “gain frames”). In contrast, negative reframes, such as All that glitters is not gold, provide helpful warnings about difficult situations, and therefore encourage proactive coping (cf. “problem-focused coping”). This study examined the validity of the distinction between positive and negative reframes and whether the distinction applies to proverbs. Six judges categorized 199 proverbs as positive or negative reframes. Results showed that the positive reframes were rated by college students as more pleasant, conceptually simpler, and more familiar than the negative