The anatomy of a large-scale hypertextual Web search engine
WWW7 Proceedings of the seventh international conference on World Wide Web 7
Authoritative sources in a hyperlinked environment
Journal of the ACM (JACM)
On the approximation of curves by line segments using dynamic programming
Communications of the ACM
An Online Algorithm for Segmenting Time Series
ICDM '01 Proceedings of the 2001 IEEE International Conference on Data Mining
What's new on the web?: the evolution of the web from a search engine perspective
Proceedings of the 13th international conference on World Wide Web
Proceedings of the 13th international conference on World Wide Web
Sic transit gloria telae: towards an understanding of the web's decay
Proceedings of the 13th international conference on World Wide Web
A large-scale study of the evolution of web pages
Software—Practice & Experience - Special issue: Web technologies
On the temporal dimension of search
Proceedings of the 13th international World Wide Web conference on Alternate track papers & posters
ACM Transactions on Internet Technology (TOIT)
Link analysis ranking: algorithms, theory, and experiments
ACM Transactions on Internet Technology (TOIT)
Trend detection through temporal link analysis
Journal of the American Society for Information Science and Technology - Special issue: Webometrics
Page quality: in search of an unbiased web ranking
Proceedings of the 2005 ACM SIGMOD international conference on Management of data
VLDB '05 Proceedings of the 31st international conference on Very large data bases
Rank synopses for efficient time travel on the web graph
CIKM '06 Proceedings of the 15th ACM international conference on Information and knowledge management
Comparing apples and oranges: normalized pagerank for evolving graphs
Proceedings of the 16th international conference on World Wide Web
A time machine for text search
SIGIR '07 Proceedings of the 30th annual international ACM SIGIR conference on Research and development in information retrieval
FluxCapacitor: efficient time-travel text search
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
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Web archives like the Internet Archive preserve the evolutionary history of large portions of the Web. Access to them, however, is still via rather limited interfaces - a search functionality is often missing or ignores the time axis. Time-travel search alleviates this shortcoming by enriching keyword queries with a time-context of interest. In order to be effective, time-travel queries require historical PageRank scores. In this paper, we address this requirement and propose rank synopses as a novel structure to compactly represent and reconstruct historical PageRank scores. Rank synopses can reconstruct the PageRank score of a web page as of any point during its lifetime, even in the absence of a snapshot of the Web as of that time. We further devise a normalization scheme for PageRank scores to make them comparable across different graphs. Through a comprehensive evaluation over different datasets, we demonstrate the accuracy and space-economy of the proposed methods.