Junya NAKAMURA

A Single Agent Exploration in Unknown Undirected Graphs with Whiteboards
Yuichi SUDO Daisuke BABA Junya NAKAMURA Fukuhito OOSHITA Hirotsugu KAKUGAWA Toshimitsu MASUZAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/10/01
Vol. E98-A  No. 10  pp. 2117-2128
Type of Manuscript:  PAPER
Category: Algorithms and Data Structures
Keyword: 
graph exploration, mobile agent, whiteboard, 
 Summary | Full Text:PDF
A Distributed and Cooperative NameNode Cluster for a Highly-Available Hadoop Distributed File System
Yonghwan KIM Tadashi ARARAGI Junya NAKAMURA Toshimitsu MASUZAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2015/04/01
Vol. E98-D  No. 4  pp. 835-851
Type of Manuscript:  PAPER
Category: Computer System
Keyword: 
Hadoop, HDFS, high-availability, distributed NameNodes, automatic failover, load balancing, 
 Summary | Full Text:PDF
Efficient Randomized Byzantine Fault-Tolerant Replication Based on Special Valued Coin Tossing
Junya NAKAMURA Tadashi ARARAGI Shigeru MASUYAMA Toshimitsu MASUZAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/02/01
Vol. E97-D  No. 2  pp. 231-244
Type of Manuscript:  PAPER
Category: Dependable Computing
Keyword: 
Byzantine fault tolerance, state machine replication, Byzantine agreement, consensus, asynchronous distributed system, 
 Summary | Full Text:PDF
A Method of Parallelizing Consensuses for Accelerating Byzantine Fault Tolerance
Junya NAKAMURA Tadashi ARARAGI Toshimitsu MASUZAWA Shigeru MASUYAMA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/01/01
Vol. E97-D  No. 1  pp. 53-64
Type of Manuscript:  PAPER
Category: Dependable Computing
Keyword: 
Byzantine fault tolerance, asynchronous distributed system, agreement, consensus, state machine replication, 
 Summary | Full Text:PDF
A Concurrent Partial Snapshot Algorithm for Large-Scale and Dynamic Distributed Systems
Yonghwan KIM Tadashi ARARAGI Junya NAKAMURA Toshimitsu MASUZAWA 
Publication:   IEICE TRANSACTIONS on Information and Systems
Publication Date: 2014/01/01
Vol. E97-D  No. 1  pp. 65-76
Type of Manuscript:  PAPER
Category: Dependable Computing
Keyword: 
fault-tolerance, large-scale distributed system, concurrent snapshot, checkpoint, rollback, 
 Summary | Full Text:PDF