Publication statistics

Pub. period:1991-2000
Pub. count:4
Number of co-authors:11


Number of publications with 3 favourite co-authors:

Hyo Ashihara:
Naoki Utsunomiya:
Kyu Sung Park:



Productive colleagues

Xiaohua Jia's 3 most productive colleagues in number of publications:

Chengzheng Sun:31
David Chen:14
Yun Yang:8

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Xiaohua Jia


Publications by Xiaohua Jia (bibliography)

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Yang, Yun, Sun, Chengzheng, Zhang, Yanchun and Jia, Xiaohua (2000): Real-Time Cooperative Editing on the Internet. In IEEE Internet Computing, 4 (3) pp. 18-25.

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Sun, Chengzheng, Jia, Xiaohua, Zhang, Yanchun, Yang, Yun and Chen, David (1998): Achieving Convergence, Causality Preservation, and Intention Preservation in Real-Time Cooperative Editing Systems. In ACM Transactions on Computer-Human Interaction, 5 (1) pp. 63-108.

Real-time cooperative editing systems allow multiple users to view and edit the same text/graphic/image/multimedia document at the same time from multiple sites connected by communication networks. Consistency maintenance is one of the most significant challenges in designing and implementing real-time cooperative editing systems. In this article, a consistency model, with properties of convergence, causality preservation, and intention preservation, is proposed as a framework for consistency maintenance in real-time cooperative editing systems. Moreover, an integrated set of schemes and algorithms, which support the proposed consistency model, are devised and discussed in detail. In particular, we have contributed (1) a novel generic operation transformation control algorithm for achieving intention preservation in combination with schemes for achieving convergence and causality preservation and (2) a pair of reversible inclusion and exclusion transformation algorithms for stringwise operations for text editing. An Internet-based prototype system has been built to test the feasibility of the proposed schemes and algorithms.

© All rights reserved Sun et al. and/or ACM Press

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Sun, Chengzheng, Zhang, Yanchun, Jia, Xiaohua and Yang, Yun (1997): A Generic Operation Transformation Scheme for Consistency Maintenance in Real-Time Cooperative Editing Systems. In: Payne, Stephen C. and Prinz, Wolfgang (eds.) Proceedings of the International ACM SIGGROUP Conference on Supporting Group Work 1997 November 11-19, 1997, Phoenix, Arizona, USA. pp. 425-434.

In real-time cooperative editing systems, independent operations on any part of the shared document may be generated from multiple cooperating sites. It is very important and technically challenging to ensure that the effect of executing an operation at remote sites, in the presence of concurrent execution of independent operations, achieves the same effect as executing this operation at the local site at the time of its generation, thus preserving its intention and maintaining system consistency. In this paper, we investigate the technical issues involved in preserving intentions of concurrent operations, explain the reasons why traditional serialization-based concurrency control strategies and existing operational transformation strategies failed to solve these problems, and propose a generic operation transformation scheme for intention preservation and consistency maintenance in real-time cooperative editing systems. The proposed scheme has been implemented in an Internet-based prototype REDUCE (REal-time Distributed Unconstrained Cooperative Editing) system.

© All rights reserved Sun et al. and/or ACM Press

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Sinha, Pradeep Kumar, Maekawa, Mamoru, Shimizu, Kentaro, Jia, Xiaohua, Ashihara, Hyo, Utsunomiya, Naoki, Park, Kyu Sung and Nakano, Hirohiko (1991): The Galaxy Distributed Operating System. In IEEE Computer, 24 (8) pp. 34-41.

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