Hiroyuki KITAGAWA


A Scheme for Fast k-Concealment Anonymization
Ryosuke KOYANAGI Ryo FURUKAWA Tsubasa TAKAHASHI Takuya MORI Toshiyuki AMAGASA Hiroyuki KITAGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2016/04/01
Vol. E99-D  No. 4  pp. 1000-1009
Type of Manuscript:  Special Section PAPER (Special Section on Data Engineering and Information Management)
Category: 
Keyword: 
k-concealmentprivacydata publishing
 Summary | Full Text:PDF(1.4MB)

Probabilistic Frequent Itemset Mining on a GPU Cluster
Yusuke KOZAWA Toshiyuki AMAGASA Hiroyuki KITAGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/04/01
Vol. E97-D  No. 4  pp. 779-789
Type of Manuscript:  Special Section PAPER (Special Section on Data Engineering and Information Management)
Category: 
Keyword: 
GPUuncertain databasesprobabilistic frequent itemsets
 Summary | Full Text:PDF(1.4MB)

MV-OPES: Multivalued-Order Preserving Encryption Scheme: A Novel Scheme for Encrypting Integer Value to Many Different Values
Hasan KADHEM Toshiyuki AMAGASA Hiroyuki KITAGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/09/01
Vol. E93-D  No. 9  pp. 2520-2533
Type of Manuscript:  PAPER
Category: Data Engineering, Web Information Systems
Keyword: 
encryptionorder-preservingdatabase outsourcingstatistical attack
 Summary | Full Text:PDF(850.9KB)

Social Bookmarking Induced Active Page Ranking
Tsubasa TAKAHASHI Hiroyuki KITAGAWA Keita WATANABE 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2010/06/01
Vol. E93-D  No. 6  pp. 1403-1413
Type of Manuscript:  Special Section PAPER (Special Section on Info-Plosion)
Category: Information Retrieval
Keyword: 
social bookmarkactivation analysisranking algorithmweb mining
 Summary | Full Text:PDF(1.6MB)

Requirement Specification and Derivation of ECA Rules for Integrating Multiple Dissemination-Based Information Sources
Tomoyuki KAJINO Hiroyuki KITAGAWA Yoshiharu ISHIKAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2004/01/01
Vol. E87-D  No. 1  pp. 3-14
Type of Manuscript:  Special Section PAPER (Special Section on the 2002 IEICE Excellent Paper Award)
Category: 
Keyword: 
information disseminationinformation integrationECA rulerelational algebra
 Summary | Full Text:PDF(480KB)

False Drop Analysis of Set Retrieval with Signature Files
Hiroyuki KITAGAWA Yoshiharu ISHIKAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1997/06/25
Vol. E80-D  No. 6  pp. 653-664
Type of Manuscript:  PAPER
Category: Databases
Keyword: 
access methodcomplex objectadvanced data modelssignature filefalse dropset retrieval
 Summary | Full Text:PDF(739.9KB)

Design and Performance Analysis of Indexing Schemes for Set Retrieval of Nested Objects
Yoshiharu ISHIKAWA Hiroyuki KITAGAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1995/11/25
Vol. E78-D  No. 11  pp. 1424-1432
Type of Manuscript:  Special Section PAPER (Special Issue on Advanced Database Technologies)
Category: Implementation
Keyword: 
set retrievalnested objectsignature filenested indexaccess methodperformance analysis
 Summary | Full Text:PDF(678.1KB)

Optimization of Join-Type Queries in Nested Relational Databases
Yaxin LI Hiroyuki KITAGAWA Nobuo OHBO 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 1994/06/25
Vol. E77-D  No. 6  pp. 648-659
Type of Manuscript:  PAPER
Category: Databases
Keyword: 
databases
 Summary | Full Text:PDF(935.9KB)