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Within the study of travel demand using the activity-based approach (Axhausen and Ga« rling, 1992), there is an increasing interest in the influence of social interactions on activity-travel decisions (Bhat and Lawton, 2000). Concomitantly, there is a growing interest in the study of social activities, which recognizes both their importance in the overall(More)
Email archives are full of social information, including how messages are addressed and frequency of contact between senders and receivers. To study the use of this rich metadata for email management, particularly email triage, we deployed SNARF, a prototype tool which uses social metadata to organize received email by correspondent, sort received email by(More)
We evaluate the use and potential benefits of social sorting as a technique for managing email. We present SNARF, the Social Network and Relationship Finder, a tool which filters and sorts email based on the type of message and the user's past history with an email correspondent, a process we refer to as social sorting. This tool also combines several(More)
Online forums are rich sources of information about user communication activity over time. Finding temporal patterns in online forum communication threads can advance our understanding of the dynamics of conversations. The main challenge of temporal analysis in this context is the complexity of forum data. There can be thousands of interacting users, who(More)
Social network site (SNS) platforms have the potential to be effective information-seeking channels due to their technical and social affordances, such as the ability to broadcast content to a large group and to aggregate one’s contacts. This study tests the impact of a Facebook app that allows users to visualize their network of Facebook Friends to(More)
Caption The intuitive appeal of force-directed layouts is due in part to their ability to represent underlying community structures. Such diagrams show dense pockets of nodes with bridges connecting across clusters. Yet, it is possible to start, rather than end, with community structure. This is a " pinwheel " diagram using the author's Facebook personal(More)
Building on existing stochastic actor-oriented models for panel data, we employ a conditional logistic framework to explore growth mechanisms for tie creation in continuously-observed networks. This framework models the likelihood of tie formation distinguishing it from hazard models that consider time to tie formation. It enables multiple growth mechanisms(More)