Self-similarity in World Wide Web traffic: evidence and possible causes
IEEE/ACM Transactions on Networking (TON)
The quality of online social relationships
Communications of the ACM - How the virtual inspires the real
Proceedings of the 12th ACM SIGKDD international conference on Knowledge discovery and data mining
On unbiased sampling for unstructured peer-to-peer networks
Proceedings of the 6th ACM SIGCOMM conference on Internet measurement
FANMOD: a tool for fast network motif detection
Bioinformatics
Analysis of topological characteristics of huge online social networking services
Proceedings of the 16th international conference on World Wide Web
Measurement and analysis of online social networks
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
Why we twitter: understanding microblogging usage and communities
Proceedings of the 9th WebKDD and 1st SNA-KDD 2007 workshop on Web mining and social network analysis
Statistical analysis of the social network and discussion threads in slashdot
Proceedings of the 17th international conference on World Wide Web
Knowledge sharing and yahoo answers: everyone knows something
Proceedings of the 17th international conference on World Wide Web
Planetary-scale views on a large instant-messaging network
Proceedings of the 17th international conference on World Wide Web
User interactions in social networks and their implications
Proceedings of the 4th ACM European conference on Computer systems
Beyond friendship graphs: a study of user interactions in Flickr
Proceedings of the 2nd ACM workshop on Online social networks
Video interactions in online video social networks
ACM Transactions on Multimedia Computing, Communications, and Applications (TOMCCAP)
Characterizing User Groups in Online Social Networks
EUNICE '09 Proceedings of the 15th Open European Summer School and IFIP TC6.6 Workshop on The Internet of the Future
Understanding online social network usage from a network perspective
Proceedings of the 9th ACM SIGCOMM conference on Internet measurement conference
Characterizing user behavior in online social networks
Proceedings of the 9th ACM SIGCOMM conference on Internet measurement conference
What is Twitter, a social network or a news media?
Proceedings of the 19th international conference on World wide web
Measurement and analysis of an online content voting network: a case study of Digg
Proceedings of the 19th international conference on World wide web
Second life: a social network of humans and bots
Proceedings of the 20th international workshop on Network and operating systems support for digital audio and video
Hermes: clustering users in large-scale e-mail services
Proceedings of the 1st ACM symposium on Cloud computing
Time-based sampling of social network activity graphs
Proceedings of the Eighth Workshop on Mining and Learning with Graphs
On managing social data for enabling socially-aware applications and services
Proceedings of the 3rd Workshop on Social Network Systems
WOSN'10 Proceedings of the 3rd conference on Online social networks
Understanding latent interactions in online social networks
IMC '10 Proceedings of the 10th ACM SIGCOMM conference on Internet measurement
Exploiting locality of interest in online social networks
Proceedings of the 6th International COnference
Measuring user behavior in online social networks
IEEE Network: The Magazine of Global Internetworking
Measurement and gender-specific analysis of user publishing characteristics on myspace
IEEE Network: The Magazine of Global Internetworking
Using cohesive subgroups for analyzing the evolution of the friend view mobile social network
UIC'10 Proceedings of the 7th international conference on Ubiquitous intelligence and computing
Evolution analysis of a mobile social network
ADMA'10 Proceedings of the 6th international conference on Advanced data mining and applications: Part I
Proceedings of the 20th international conference on World wide web
Fragile online relationship: a first look at unfollow dynamics in twitter
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Vulnerability in socially-informed peer-to-peer systems
Proceedings of the 4th Workshop on Social Network Systems
Modeling social networks through user background and behavior
WAW'11 Proceedings of the 8th international conference on Algorithms and models for the web graph
Sharing graphs using differentially private graph models
Proceedings of the 2011 ACM SIGCOMM conference on Internet measurement conference
Daily deals: prediction, social diffusion, and reputational ramifications
Proceedings of the fifth ACM international conference on Web search and data mining
Canal: scaling social network-based Sybil tolerance schemes
Proceedings of the 7th ACM european conference on Computer Systems
Characterizing user navigation and interactions in online social networks
Information Sciences: an International Journal
Confidant: protecting OSN data without locking it up
Middleware'11 Proceedings of the 12th ACM/IFIP/USENIX international conference on Middleware
A density-based approach for mining overlapping communities from social network interactions
Proceedings of the 2nd International Conference on Web Intelligence, Mining and Semantics
Space-efficient sampling from social activity streams
Proceedings of the 1st International Workshop on Big Data, Streams and Heterogeneous Source Mining: Algorithms, Systems, Programming Models and Applications
Beyond Social Graphs: User Interactions in Online Social Networks and their Implications
ACM Transactions on the Web (TWEB)
On the bursty evolution of online social networks
Proceedings of the First ACM International Workshop on Hot Topics on Interdisciplinary Social Networks Research
Online social networks: A survey of a global phenomenon
Computer Networks: The International Journal of Computer and Telecommunications Networking
Confidant: protecting OSN data without locking it up
Proceedings of the 12th International Middleware Conference
Tweets Beget Propinquity: Detecting Highly Interactive Communities on Twitter Using Tweeting Links
WI-IAT '12 Proceedings of the The 2012 IEEE/WIC/ACM International Joint Conferences on Web Intelligence and Intelligent Agent Technology - Volume 01
Iolaus: securing online content rating systems
Proceedings of the 22nd international conference on World Wide Web
Social resilience in online communities: the autopsy of friendster
Proceedings of the first ACM conference on Online social networks
Understanding latent interactions in online social networks
ACM Transactions on the Web (TWEB)
Unveiling group characteristics in online social games: a socio-economic analysis
Proceedings of the 23rd international conference on World wide web
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Online social networking services are among the most popular Internet services according to Alexa.com and have become a key feature in many Internet services. Users interact through various features of online social networking services: making friend relationships, sharing their photos, and writing comments. These friend relationships are expected to become a key to many other features in web services, such as recommendation engines, security measures, online search, and personalization issues. However, we have very limited knowledge on how much interaction actually takes place over friend relationships declared online. A friend relationship only marks the beginning of online interaction. Does the interaction between users follow the declaration of friend relationship? Does a user interact evenly or lopsidedly with friends? We venture to answer these questions in this work. We construct a network from comments written in guestbooks. A node represents a user and a directed edge a comments from a user to another. We call this network an activity network. Previous work on activity networks include phone-call networks [34, 35] and MSN messenger networks [27]. To our best knowledge, this is the first attempt to compare the explicit friend relationship network and implicit activity network. We have analyzed structural characteristics of the activity network and compared them with the friends network. Though the activity network is weighted and directed, its structure is similar to the friend relationship network. We report that the in-degree and out-degree distributions are close to each other and the social interaction through the guestbook is highly reciprocated. When we consider only those links in the activity network that are reciprocated, the degree correlation distribution exhibits much more pronounced assortativity than the friends network and places it close to known social networks. The k-core analysis gives yet another corroborating evidence that the friends network deviates from the known social network and has an unusually large number of highly connected cores. We have delved into the weighted and directed nature of the activity network, and investigated the reciprocity, disparity, and network motifs. We also have observed that peer pressure to stay active online stops building up beyond a certain number of friends. The activity network has shown topological characteristics similar to the friends network, but thanks to its directed and weighted nature, it has allowed us more in-depth analysis of user interaction.