On the Stability of Community Detection Algorithms on Longitudinal Citation Data

There are fundamental differences between citation networks and other classes of graphs. In particular, given that citation networks are directed and acyclic, methods developed primarily for use with undirected social network data may face obstacles. This is particularly true for the dynamic development of community structure in citation networks. Namely, it is neither clear when it is appropriate to employ existing community detection approaches nor is it clear how to choose among existing approaches. Using simulated data, we attempt to clarify the conditions under which one should use existing methods and which of these algorithms is appropriate in a given context. We hope this paper will serve as both a useful guidepost and an encouragement to those interested in the development of more targeted approaches for use with longitudinal citation data.Comment: 17 pages, 7 figures, presenting at Applications of Social Network Analysis 2009, ETH Zurich Edit, August 17, 2009: updated abstract, figures, text clarification

Survey and Analysis of Production Distributed Computing Infrastructures

This report has two objectives. First, we describe a set of the production distributed infrastructures currently available, so that the reader has a basic understanding of them. This includes explaining why each infrastructure was created and made available and how it has succeeded and failed. The set is not complete, but we believe it is representative. Second, we describe the infrastructures in terms of their use, which is a combination of how they were designed to be used and how users have found ways to use them. Applications are often designed and created with specific infrastructures in mind, with both an appreciation of the existing capabilities provided by those infrastructures and an anticipation of their future capabilities. Here, the infrastructures we discuss were often designed and created with specific applications in mind, or at least specific types of applications. The reader should understand how the interplay between the infrastructure providers and the users leads to such usages, which we call usage modalities. These usage modalities are really abstractions that exist between the infrastructures and the applications; they influence the infrastructures by representing the applications, and they influence the ap- plications by representing the infrastructures

The Ursinus Weekly, November 15, 1965

Summer pre-professional traineeships offered • Return of the Duke soph dance • Freeland a-go-go scores success • Letter from the National Student Committee for Defense of Vietnam • UC receives Kodak grant of $2,400 • Gateway to careers available to seniors • Far Corners coffee house offers diversion for students • B\u27Chem Society hears two guests • Winter gym hours now arranged • Bethlehem jazz group performs Sunday in chapel • Library science consultant on campus Dec. 1 • Editorial: Bomberger basement disgrace; New eligibility rule announced; Communication defect at UC • Antiqua Players feature early music at Forum; Demonstrate variations of 5 centuries • Handicaps • Upperclassman pokes fun at Ursinus institutions, students in rollicking, satirical essay • Hobart foils winless UC: Tracey scores lone Bear TD • UC jars S\u27thmore 12-0 • Mule booters top UC • Intramural corner • Greek gleaningshttps://digitalcommons.ursinus.edu/weekly/1210/thumbnail.jp

Ouvrir le village au monde

Voici dix ans que le village d'El Limon (République dominicaine) dispose de l'Internet sans fi l. Un système qui ne cesse de s'étendre et d'influencer l'éducation des jeunes villageois

Making the village global

The village of El Limon in the Dominican Republic has had wireless internet for almost 10 years. The system continues to expand and have a major impact on the education of the young people living there

All Gifts Large and Small

Much attention has been focused in recent years on the ethical acceptability of physicians receiving gifts from drug companies. Professional guidelines recognize industry gifts as a conflict of interest and establish thresholds prohibiting the exchange of large gifts while expressly allowing for the exchange of small gifts such as pens, note pads, and coffee. Considerable evidence from the social sciences suggests that gifts of negligible value can influence the behavior of the recipient in ways the recipient does not always realize. Policies and guidelines that rely on arbitrary value limits for gift-giving or receipt should be reevaluated

The Ursinus Weekly, March 21, 1966

Senior Prom is lovely Polynesian paradise: Name perm officers, lord & lady • Ross to speak on retarded children • Pi Nu sponsors S-F Songfest • Romane named editor: Production editors also announced; Will take over in April • Seven junior men named to Cub and Key at Prom • Thirteen enroll to visit Europe with seminar • IRC attends Model United Nations • Senior concert finale • Campus Chest is coming • Cast named for Curtain Club Spring play • Editorial: Constructive criticism; A note of thanks • Hinkle will leave Curtain Club at it\u27s highest peak in years: Outgoing director names Adding machine no. 1 play • Fall orientation proven a flop • Thief pardoned: Maps reappear in torn atlases • The most fun on campus discovered behind the swinging kitchen doors • Intramural corner • Girls\u27 basketball season: Overpowers Owls; Dominate Beaver; UC bows to Rams; 6 outplay 1 ; UC beats Cheyney • Greek gleanings • Y tutors cooperate with local NAACP • Ursinus golf team to play on Limerick coursehttps://digitalcommons.ursinus.edu/weekly/1221/thumbnail.jp

The Ursinus Weekly, May 17, 1965

Michener to address Class of 1965 • UC awarded science grant • That was the Inter-Frat Spring weekend that was • Three Ursinus juniors to spend Summer in Europe • Agency plans diverse concerts for next season • Negro choir to present concert • Howard to attend Summer institute • Dr. Smith talks on timely topic • Staiger to lead science seminar • $10,000 presented to College to furnish new dining room • Editorial: A stomping time; Now\u27s your chance; Bomberger concert • Committee announces details of revised customs program • Last word • Souders plays his way through Ursinus College • Are the Zorbas right? • Lacrosse team undefeated • UC second in MACs: PMC wins by one point, 33-32 • Baseball team wins three: Nears tie for first place • Netmen lose to M\u27berg, LaSalle • Women netters win twice • Softballers rip E. S\u27burg • Greek gleaningshttps://digitalcommons.ursinus.edu/weekly/1250/thumbnail.jp