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The following topics are dealt with: information systems and information technologies; data storage devices; data storage systems; computer algebra systems and applications; computational geometry; computer graphics; virtual reality; business intelligence; high-performance computing and information visualization.
The XML data of continuous stream type are popular in network application through the Internet. And also there are researches related to query processing for streaming XML data. As a basic research to efficiently query, we propose not only a labeled ordered tree model representing the XML but also a mining method to extract frequent structures from streaming XML data. That is, XML data to continuously...
We design and apply a Genetic Algorithm that maximizes the cyclic-entropy of a social network model, hence optimizing its robustness to failures. Our algorithm was applied on three types of social networks: scale-free, small-world and random networks. The three types of networks were generated using Barabasi and Albertpsilas generative model, Watts and Strogatzpsilas model and Erdos-Renyipsilas model,...
High dimensional data in several applications seriously spoils classification computation of several types of learning. In order to relieve the difficulties of such a high dimension, this paper proposes the classification computation, which refers to a modified neural network: the neural network with weights optimized by particle swarm intelligence. The contemporary is placed on the combination of...
The purpose of this study addresses service model for enhancement u-learning systempsilas utilization on adaptive instruction system. Proposed service model include two systems. The one is the U-book system and the other is the preWBI system. Proposed service model should be able to retrieve information without ubiquitous computing technology and to access on line contents unless location of them...
IEEE 802.16e adds mobility support to the IEEE 802.16 standard so that terminals can move while receiving services and preserve ongoing IP sessions during handover. IP layer handover for MSs is handled by MIPv6. The cross-layer scheme supports seamless handover by exploiting the link layer handover indicator and designing interleaving scheme of the 802.16e and the FMIPv6 handover procedures. We propose...
Mobile IPv6 (MIPv6) is a protocol to support mobility for IPv6. Fast Handovers for MIPv6 (FMIPv6) have been studied, since in MIPv6 handover latency is long, and all packets are lost during handover. FMIPv6 provides seamless handover by minimizing handover latency, and prevents packet loss through buffering and tunneling. FMIPv6 uses anticipation based on layer 2 trigger information, and consists...
The Internet Engineering Task Force (IETF) has standardized Proxy Mobile IPv6 (PMIPv6). Fast Handovers for Proxy Mobile IPv6 (PFMIPv6) was studied by mipshop working group to reduce packet loss in PMIPv6. PFMIPv6 is fast handover extension of PMIPv6. PFMIPv6 handover latency is longer than PMIPv6, although it reduces packet loss in PMIPv6. In this paper, we propose Enhanced PFMIPv6 to reduce handover...
In this paper, we present a novel combinatorial auction (CA) based trading infrastructure to enable the supply and demand of Cloud services from different Cloud providers (CP). We propose a new auction policy that considers the relationship among CPs (mutual business relationship) in bidding mechanism. In our new auction-based market model, we allow the group of service providers to publish their...
Companies faced with rapid changes in market environment and uncertain demands of consumers are actively making investments in the information system and it is expediting the growth of the market for workflow which automates the work process. The concept of workflow mining is required for designing and supporting the business process focusing on productivity enhancement. The existing workflow mining...
The ontology repository has widely been used for storing and querying over ontology data. Recently the ontology repository gets more attentions as a component of ubiquitous systems. This paper describes use of the path index to answer complex queries in ontology repository. Studies show that two types of queries namely chain queries and star queries frequently occur in SPARQL queries. Instead of using...
The IEEE 802.16 is developed for fixed broadband wireless technology with wider coverage, higher data transmission speeds and excellent quality of services (QoS). IEEE 802.16e is an amendment to the IEEE 802.16 that corporates the handover process to support mobility under high speeds. The mobility user basically conducts hard handover process after the MS terminates the connection with the serving...
In this paper, we propose a new SQL based incremental distributed algorithm for predicting the next location of a mobile user in a mobile Web environments. Parallel and distributed data mining algorithm is applied on moving logs stored in geographically distributed data grid to generate the mobility pattern, which provides various location based services to the mobile users. One of the existing works...
An effective network layer which reduces cluster file system complexity is definitely needed in cluster computing environments where more than thousands of nodes are connected on a variety of different networks. Therefore, widely used cluster file systems such as Lustre, PVFS2, and GlusterFS provide networking virtualization layer. Through networking virtualization layer, each node accesses other...
Demand paging with NAND flash memory is an attractive memory management technique for embedded system because of its cost efficiency. However, demand paging has the page fault handling latency. To overcome this drawback, most operating systems take advantage of kernel-level read-ahead. On the contrary, in the compressed filesystem, kernel-level read-ahead degrades performance of demand paging. The...
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