[ English | Japanese
portrait Keishi TAJIMA, D.Sc. (1996, the Dept. of Information Science of University of Tokyo)
Professor at Institute for Liberal Arts and Sciences, Kyoto University
Professor at Social Media Research Unit, Department of Social Informatics, Graduate School of Informatics, Kyoto University (secondary)

Research Interests

Publications (copyright notice)

Recent Publications

title / published in author(s)  pdf  misc
Predicting Popularity of Twitter Accounts through the Discovery of Link-Propagating Early Adopters
Proc. of ACM CIKM, pp.639-648, Indianapolis, IN, 2016
Daichi Imamori,
Keishi Tajima
Free from ACM Author-Izer abstract
slides  .bib
Classification of Twitter Accounts into Targeting Accounts and Non-Targeting Accounts
Proc. of ACM Hypertext, pp.291-296, Halifax, Canada, 2016
Hikaru Takemura,
Keishi Tajima
Free from ACM Author-Izer abstract
slides  .bib
Subtopic Ranking Based on Hierarchical Headings
Proc. of WEBIST, pp.121-130, Rome, Italy, 2016
Tomohiro Manabe,
Keishi Tajima
pdf abstract
slides
Heading-Aware Proximity Measure and Its Application to Web Search
DBSJ Journal, Vol.14, No.2, pp.1-6, 2016
Tomohiro Manabe,
Keishi Tajima
pdf abstract
.bib  data
Automatic Generation of Authentication Questions from Private Messages
Proc. of IEEE/WIC/ACM WI, pp.505-510, Singapore, 2015
Ming Li,
Keishi Tajima
pdf abstract
slides  .bib
Heading-Aware Snippet Generation for Web Search
Proc. of AIRS, pp.188-200, LNCS, Vol. 9460, Brisbane, Australia, 2015
Tomohiro Manabe,
Keishi Tajima
pdf abstract  .bib
slides  data
Extracting Logical Hierarchical Structure of HTML Documents Based on Headings
Proc. of VLDB, Vol.8, No.12, pp.1606-1617, Kohala Coast, HI, 2015
Tomohiro Manabe,
Keishi Tajima
pdf abstract  .bib
slides  poster
software
Classification of Twitter Follow Links Based on the Followers' Intention
Proc. of ACM SAC, pp.1174-1180, Salamanca, Spain, 2015
Hikaru Takemura,
Atsushi Tanaka, Keishi Tajima
Free from ACM Author-Izer abstract
slides  .bib
Why You Follow: A Classification Scheme for Twitter Follow Links
Proc. of ACM Hypertext, pp.324-326, Santiago, Chile, 2014
Atsushi Tanaka,
Hikaru Takemura, Keishi Tajima
Free from ACM Author-Izer abstract
poster  .bib
Online Retweet Recommendation with Item Count Limits
Proc. of IEEE/WIC/ACM WI, pp.282-289, Warsaw, Poland, 2014
Xiaoqi Zhao,
Keishi Tajima
pdf abstract
slides  .bib
Schemaless Semistructured Data Revisited
--Reinventing Peter Buneman's Deterministic Semistructured Data Model--

In Search of Elegance in the Theory and Practice of Computation
- Essays Dedicated to Peter Buneman
, pp.466-482, LNCS, Vol. 8000, 2013
Keishi Tajima pdf abstract
slides  .bib
Tweet Classification Based on Their Lifetime Duration
Proc. of ACM CIKM, pp.2367-2370, Maui, HI, 2012
Hikaru Takemura,
Keishi Tajima
Free from ACM Author-Izer abstract
poster  .bib
Noise Robust Detection of the Emergence and Spread of Topics on the Web
Proc. of TempWeb (in conj. with WWW Conf.), pp.9-16, Lyon, France, 2012
Masahiro Inoue,
Keishi Tajima
Free from ACM Author-Izer abstract  .bib
slides  software

Main Publications

There are bugs in our ICDE 2010 paper. Here is a bug-fixed version.

title / published in author(s)  pdf  misc
Optimal Tree Node Ordering for Child/Descendant Navigations
Proc. of IEEE ICDE, pp.840-843, Long Beach, CA, 2010
Atsuyuki Morishima,
Keishi Tajima, Masateru Tadaishi
pdf abstract
slides  .bib
WildThumb: A Web Browser Supporting Efficient Task Management on Wide Displays
Proc. of ACM IUI, pp.159-168, Hong Kong, 2010
Shenwei Liu,
Keishi Tajima
Free from ACM Author-Izer abstract
slides  .bib
Browsing Large HTML Tables on Small Screens
Proc. of ACM UIST, pp.259-268, Monterey, CA, 2008
Keishi Tajima,
Kaori Ohnishi
Free from ACM Author-Izer abstract  .bib
slides  demo
Incremental Evaluation of a Monotone XPath Fragment
Proc. of ACM CIKM, pp.245-246, Bremen, Germany, 2005
Hidetaka Matsumura,
Keishi Tajima
Free from ACM Author-Izer abstract
poster  .bib
Answering XPath Queries over Networks by Sending Minimal Views
Proc. of VLDB, pp.48-59, Toronto, Canada, 2004
Keishi Tajima,
Yoshiki Fukui
pdf abstract
slides  .bib
Archiving Scientific Data (extended version of the SIGMOD paper)
ACM TODS, Vol.29, No.1 (SIGMOD/PODS special issue), pp.2-42, 2004
Peter Buneman, Sanjeev Khanna,
Keishi Tajima, Wang-Chiew Tan
Free from ACM Author-Izer abstract
.bib
Archiving Scientific Data
Proc. of ACM SIGMOD, pp.1-12, Madison, WI, 2002
Peter Buneman, Sanjeev Khanna,
Keishi Tajima, Wang-Chiew Tan
Free from ACM Author-Izer abstract
.bib
A Query Model to Synthesize Answer Intervals from Indexed Video Units
IEEE Trans. on Knowledge and Data Eng., Vol.13, No.5, pp.824-838, 2001
Sujeet Pradhan, Keishi Tajima,
Katsumi Tanaka
pdf abstract
.bib
Discovery and Retrieval of Logical Information Units in Web
(invited) Proc. of WOWS (ACM DL workshop), pp.13-23, Berkeley, CA, 1999
Keishi Tajima, Kenji Hatano, Takeshi Matsukura,
Ryouichi Sano, Katsumi Tanaka
pdf abstract
slides  .bib
Finding Context Paths for Web Pages
Proc. of ACM Hypertext, pp.13-22, Darmstadt, Germany, 1999
Yoshiaki Mizuuchi,
Keishi Tajima
Free from ACM Author-Izer abstract
slides  .bib
Cut as a Querying Unit for WWW, Netnews, and E-mail
Proc. of ACM Hypertext, pp.235-244, Pittsburgh, PA, 1998
Keishi Tajima, Yoshiaki Mizuuchi,
Masatsugu Kitagawa, Katsumi Tanaka
Free from ACM Author-Izer abstract
slides  .bib
An Equational Object-Oriented Data Model and its Data-Parallel Query Language
Proc. of ACM OOPSLA, pp.1-18, San Jose, CA, 1996
Susumu Nishimura,
Atsushi Ohori, Keishi Tajima
Free from ACM Author-Izer abstract
.bib
Static Detection of Security Flaws in Object-Oriented Databases
Proc. of ACM SIGMOD, pp.341-352, Montreal, Canada, 1996
Keishi Tajima Free from ACM Author-Izer abstract
slides  .bib
A Polymorphic Calculus for Views and Object Sharing
Proc. of ACM PODS, pp.255-266, Minneapolis, MN, 1994
Atsushi Ohori,
Keishi Tajima
Free from ACM Author-Izer abstract
slides  .bib

Links


tajima@i.kyoto-u.ac.jp / Fax: +81(Japan) 75-753-5978 / Office: Research Bldg. #7, room 404