ISSN : 1796-203X
Volume : 4    Issue : 9    Date : September 2009

Special Issue: Selected Papers of the 9th International Conference for Young Computer
Scientists (ICYCS 2008)
Guest Editors: Huadong Ma and Guojun Wang

Guest Editorial
Huadong Ma and Guojun Wang
Page(s): 795-796
Full Text:
PDF (483 KB)

The theme of the 9th International Conference for Young Computer Scientists (ICYCS 2008) is
Computer and Communications Frontiers (CCF). The combination of computing technologies and
communications services will benefit modern people with more convenient and better lives.
Following the tradition and success of previous ICYCS conferences, ICYCS 2008 provides an
international forum for scientists and engineers in academia and industry to exchange and discuss
their experiences, new ideas, research results, and applications on all aspects of computer science
and technology and its related disciplines. We selected 10 papers with extensive extensions from
the conference for publication in this special issue.

In the first paper entitled “Measuring Software Component Reusability by Coupling and Cohesion
Metrics”, G. Gui and Paul. D. Scott proposed a set of new static metrics of coupling and cohesion
developed to assess the reusability of Java components retrieved from the Internet by a software
component search engine. These metrics differ from the majority of established metrics in three
respects: they measure the degree to which entities are coupled or resemble each other, they
quantitatively take account of indirect coupling and cohesion relationship, and they also reflect the
functional complexity of classes and methods.

In the second paper entitled “A Method for Surface Reconstruction Based on Support Vector
Machine”, Lianwei Zhang, Wei Wang, Yan Li, Xiaolin Liu, Meiping Shi, and Hangen He proposed a
method for reconstructing surface based on support vector machine (SVM). In order to overcome the
inefficiency of SVM, a feature-preserved nonuniform simplification method is employed to simplify
cloud points set, which is reduced while the feature is preserved after simplification. Then a
reconstruction method based on segmented data is proposed to accelerate SVM regression
process from cloud data.

In the third paper entitled “Distribution Network Reconfiguration Based on Particle Clonal Genetic
Algorithm”, Yemei Qin and Ji Wang proposed particle clonal genetic algorithm (PCGA) to build
particle swarm algorithm (PSO) mutation operator in order to solve mutation probability and slow
the convergence of clonal genetic algorithm (CGA) in the later stage. PCGA avoids the premature
convergence of PSO and the blindness of CGA. The global optimal solution can be obtained with
fewer generations and shorter searching time.

In the fourth paper entitled “Visually Lossless Accuracy of Motion Vector in Overcomplete Wavelet-
based Scalable Video Coding”, Chuan-Ming Song, Xiang-Hai Wang, and Fuyan Zhang proposed a
visually lossless accuracy model for scalable coding of motion vectors in overcomplete wavelet-
based scalable video codec. By exploiting theory of stationary random process, this paper first
estimated motion compensation errors in spatial domain due to inaccurate motion vectors. This
paper then extended the results to overcomplete wavelet domain, and further derived the errors
caused by fraction-pixel motion vectors. Finally, by combining with a visibility model of wavelet
coefficient errors, this paper proposed a novel algorithm to estimate the accuracy threshold of
motion vectors with which motion compensation errors will be invisible.

In the fifth paper entitled “Modeling Complex System Using T-subnet based Hierarchical Petri Nets”,
Zhijian Wang and Dingguo Wei proposed a kind of transition subnet to model complex
manufacturing system in order to provide the same service and interface after transformation as
original module. The concept “standardized interface” is presented; transition subnets are
classified into different types, and the idea of “normalized subnet” is presented; and engineering
subnet is defined and a live and normalized subnet with finite live loopbacks is proved to be an
engineering subnet. Because of live loopbacks owned by engineering subnets, the same interface
and service as the original module are reserved after the transformation between an engineering
subnet and the corresponding transition, mean while fewer preconditions are required for the
engineering subnet compared with current researches.

In the sixth paper entitled “An Automated Mechanism for Secure Input Handling”, Jin-Cherng Lin and
Jan-Min Chen presented an integral sanitizing mechanism consisting of application-level security
gateway, injection testing framework, and enhanced crawler to reduce the error rate of detection. To
mitigate the defects, the hybrid analysis module can cooperate with testing framework to perform
injection test to generate a vulnerable list. Only the Web pages that are in a list need to be checked
so the system load and false positives can mitigate effectively. Moreover, the authors proposed a
mechanism that can automatically create meta-programs and adjust the sanitizing rule of every
vulnerable injection point.

In the seventh paper entitled “Data Management of Mobile Object Tracking Applications in Wireless
Sensor Networks”, Jin Zheng, Weijia Jia, and Guojun Wang proposed link-segment storage and
query protocol to track mobile object in wireless sensor network dynamically. The main idea of the
protocol is to combine advantages of local storage with data centric storage methods to support the
query of object movement information efficiently. Object’s movement information will be stored in
node near detecting sensor and the relation of storage nodes is maintained using multiple access
entry linked list along the moving path of the object. Index-store node (a designated node) stores the
access entry messages of linked list. Users can obtain tracking information of object from a part of
linked list according to query request.

In the eighth paper entitled “SOBIE: A Novel Super-node P2P Overlay Based on Information
Exchange”, Zhigang Chen, Jiaqi Liu, Deng Li, Hui Liu, and Athanasios Vasilakos proposed a novel
super-node overlay based on information exchange called SOBIE in order to guarantee both the
efficiency and robustness in the Peer-to-Peer (P2P) network. Differing from current structured and
unstructured, or meshed and tree-like P2P overlay, the SOBIE is a whole new structure to improve
the efficiency of searching in the P2P network.

In the ninth paper entitled “Trust-Based Constraint-Secure Interoperation for Dynamic Mediator-Free
Collaboration”, Lingli Deng, Ziyao Xu, and Yeping He presented the requirements for constraint-
secure interoperation, prohibiting implicit authorizations that break constraints from other member
domains. The authors proposed a trust-based framework to implement constraint-secure
interoperation with differential trust relations between member pairs in open collaborative
scenarios. The authors also provide algorithms of a fully distributed implementation, security proofs
and demonstrative usage cases for the proposed solution.

In the last paper entitled “Improved Resource Allocation Algorithms for Practical Image Encoding in
a Ubiquitous Computing Environment”, Mianxiong Dong, Long Zheng, Kaoru Ota, Song Guo, Minyi
Guo, and Li Li proposed UMP-PerComp, a Ubiquitous Multiprocessor-based pipeline processing
architecture to support high performance pervasive application development. The authors studied
resource allocation policies that can improve the overall performance of the system and considered
those static and dynamic allocation approaches and then proposed four different allocation
algorithms by exploring various cache policies which include disabled cache, unrestricted cache
and restricted cache.

We would like to express our sincere gratitude to all the authors and reviewers who made this
special issue possible. We hope you enjoy this issue.

Index Terms
Special Issue, Computer, Communications