Search

ChinaGrid Support Platform (CGSP) is a grid middleware developed for the deployment of ChinaGrid. CGSP aims to integrate all sorts of heterogeneous resources distributed over CERNET, and provide transparent, high performance, reliable, secure and convenient grid services for scientific researchers and engineers. In addition to supply the portal to ChinaGrid, CGSP offers a whole set of tools for developing and deploying various grid applications. Analyzing large and distributed image dataset is a crucial step in understanding and constructing bioinformatics, military and medical systems. Due to the large scale dataset, such analyzing work is challenging. In this paper, a use case scenario of image processing with CGSP is presented. Such use cases illustrate how to migrate the traditional image process applications to grid systems for different roles of image processing. The purpose of this paper is to introduce the CGSP and let the engineers and scientists from different research areas know how to build a grid testbed with CGSP and how to deploy applications on it smoothly. [ABSTRACT FROM AUTHOR]

The Internet has grown rapidly in the past few years to impact all aspects of modern life. While many areas of the Internet such as commerce has shown tremendous improvements in providing convenient and complex transaction services from shopping to banking, the area of education has seen less development in terms of meeting the potential of the Internet for education. The number of web sites related to education and the types of educational uses have clearly increased on the Internet but the overall consensus is that more should be done in the area of using the Internet to enhance the educational experience of learners. Many technological innovations have been previously touted as a new paradigm for education only to see it disappear from view quietly with time. In order to make sure that the vast potential of the Internet is fully utilized for education, more structured approach and a change in the mindset of educators are needed. [ABSTRACT FROM AUTHOR]

The need for content-based image retrieval from image databases is ever increasing rapidly in many applications, such as electronic art museums, internet shopping malls, internet search engines, and medical information systems. Many such image resources have been previously developed and widely spread over the internet. In this paper, we propose a Web Service-driven architecture, named the HERMES(tHE Retrieval framework for visual MEdia Service), to support effective retrieval on large volumes of visual media resources. We explain how semantic metadata and ontology can be utilized to realize more intelligent content-based retrieval on visual media data. [ABSTRACT FROM AUTHOR]

Most of the content-based image retrieval systems focus on similarity- based retrieval of images by utilizing color, shape and texture features. For color-based image retrieval, the average color or color-histograms of images are widely used as feature vectors. In this paper, we propose a new searching scheme, called Fuzzy Membership Value-Indexing, to guarantee higher retrieval quality. This scheme allows us to retrieve images based on high-level emotional concepts, such as ‘cool', ‘soft', ‘strong,' etc. Each image is automatically classified into predefined emotional categories, by analyzing its color values in HSI color space and assigning appropriate fuzzy membership values. Our experimental results show that the proposed technique can reflect user's searching intention more accurately. [ABSTRACT FROM AUTHOR]

An efficient approach for iris recognition is presented in this paper. An efficient iris region normalization consists of a doubly polar coordinate and noise region exclude. And then a Haar wavelet transform is used to extract features from iris region of normalized. From this evaluation, we obtain iris code of small size and very high recognition rate. This effort is intended to enable a human authentication in small embedded systems, such as an integrated circuit card. [ABSTRACT FROM AUTHOR]

In this paper, we propose a system for multimedia presentation with user's participation based on events to play-out multimedia contents consisting of various heterogeneous media objects through a network. We define various types of events and propose methods for handling them with Event Constructor, Event Scheduler and Event Queue Manager. In addition, Network Manager and QoS Manager are proposed to manage network delays and to maintain the required QoS of an interactive multimedia presentation. With the proposed presentation system, a user can make a multimedia content with user's participation based on a user-defined scenario, and give a synchronous presentation through a presentation manager handling the events with priority. Finally, we implement it in Windows XP environment using Visual C++ 6.0 programming platform, and show an example of multimedia content and its presentation. [ABSTRACT FROM AUTHOR]

Electronic bulletin board (BBS) has a problem which is action to obstruct communications (the authors use "obstruction on bulletin board"). The authors introduced system that aids an operator to find such obstruction based on feature extraction of words which causes harmful psychological effects on readers. We propose a new evaluation method using "Ruination Figure" which is calculated by feature extraction. This index is displayed in two ways of stock chart for BBS operator to see trend of the index and find harmful obstruction in the BBS. [ABSTRACT FROM AUTHOR]

Because the Internet is vast and insecure, strong cryptographic protocols are required to support secure communication. In this paper, we propose an efficient way to perform secure delegations in a hierarchical group. We propose a practical multi-proxy signature scheme applicable to hierarchial organization using the Diffie-Hellman problem and secret sharing without secure channels. In addition, we improve the proposed scheme to a dynamic one allowing repeated delegations. [ABSTRACT FROM AUTHOR]

Internet-based collaboration opens a vast stream of opportunities for developing countries in acquiring international assistance. In this paper, we identify technology transferring from developed countries to developing countries as a potential form of international assistance that can be immensely benefited through collaboration over the Internet. We propose strategic means for facilitating internet collaboration in developing countries and present an example to show the Internet potential in medical technology transferring. [ABSTRACT FROM AUTHOR]

In this paper we introduce an effective method of the adult image classification via MPEG-7 descriptors. The proposed system uses MPEG-7 descriptors as the main feature of the adult image classification systems. The simulation shows that the proposed image classification system performs the 5 class classification task with success rate of above 70%. [ABSTRACT FROM AUTHOR]

In this paper, self-networking and replaceable structure in vector graphics contents are presented for wireless internet service. The wireless networks over 2G or 3G are limited in the sense of the speed and the cost. Considering these characteristics of wireless network, self-networking method and replaceable structure in downloaded contents are introduced in order to save the amount of data and provide variations for contents. During the display of contents, a certain data for the contents is downloaded from the server and it is managed appropriately for the operation of the contents. The downloaded materials are reflected to the original contents using replaceable structure. Also, the downloading and modification are independent of the play. In this implementation, the data consists of control data for control and resource data for image, sound or text. Comparing to the conventional methods which download the whole data, the amount of the transmitted data is very small since only the difference is downloaded. Also, during the play of the contents, the changes are adopted immediately. The throughput analysis of the proposed structure is given based on the markov process. The whole functions are implemented in wireless handset and the various applications are discussed. [ABSTRACT FROM AUTHOR]

Chat is one of the Internet's services that have had a particularly strong influence on young people, and its effects on their skills development is worthy of investigation. This study focuses on the possible consequences of the use of Chat on cognitive processes. More specifically, it evaluates the impact of frequent Chat use on the development of memory and on cognitive style. This research, exploratory in nature, began with an instrument for classifying 125 students in 5th to 8th grade at schools in Chile, according to their Chat use. We then applied a memory and attention test based on the Digit Span Subtest of the Wechsler Intelligence Scale for Children, followed by a Group Embedded Figures Test to evaluate cognitive styles. The results show that there are significant differences on both tests between frequent and infrequent users of Chat services. [ABSTRACT FROM AUTHOR]

The complexity of the evolving web requires autonomous and adaptive web applications. To construct a nature-inspired multi-agent system may be an important means of addressing this. However what mechanisms are appropriate for agents to emerge such an applications is still under consideration. This paper considers a credit card mechanism in economic interactions as a decentralized control approach of the eco-network computation platform (a nature-inspired multi-agent system). The simulation results prove that the approach can offer a guarantee for the platform to emerge autonomous and adaptive web applications. [ABSTRACT FROM AUTHOR]

With the spread of mobile communication in recent years, location dependent services become important. Along with it, the privacy protection of mobile subscribers, too, becomes important. This paper describes anycast-based architecture of location dependent services in wide areas with short-range wireless access technologies such as wireless LAN. As an application, it discusses a WWW implementation used in ISP's access network using anycast and mechanisms that subscribers can apply to enforce their privacy policies by themselves before they disclose personal location information to each WWW server out of the access network. A field trial is being performed at MIAKO.net, a public wireless ISP in Kyoto, JAPAN, to provide location dependent tourist information. [ABSTRACT FROM AUTHOR]

The rapid growth of the Internet has caused a large number of social problems including invasion of privacy and violation of personal identity. Currently, it is an emerging trend to verify personal identity based on hybrid methods (for example, by combining the existing off-line and on-line verification methods) using the Internet in the legacy applications. As a result, many security problems of the Internet is now becoming the practical impacts on our social applications. In this paper, we study multi-modal techniques for preventing identity theft in the social applications from the practical perspectives. A digital signature techniques and multi-modal biometrics are exploited in our scheme without requiring users to hold additional hardware devices. [ABSTRACT FROM AUTHOR]

The Internet is changing the economy, the society and the culture. But an inequality in access to information exits and is creating an information digital divide. This article describes the ODISEAME project as an effort to extend the use of the Internet to several very different countries of the Euro-Mediterranean area. One of the main achievements of the project is to share and transfer technology and knowledge, with the aim of reducing the existing barriers for digital inclusion. ODISEAME is an intercultural and multilingual project, which is focused on the application of Information and Communication Technologies to the learning process in the context of University Education. The article firstly examines the barriers of digital inclusion: cost of infrastructure and lack of contents in the mother tongue. It then describes the ODISEAME project and the e-learning experiences, before discussing how the project promotes digital inclusion. [ABSTRACT FROM AUTHOR]

A conference key distribution system is designed to establish a common secret key so that a group of people are able to hold a conference securely. However, the existing conference distribution schemes do not consider the situation that a user may be in a conference for only a period of time. If a user resigned from this session and premeditatedly eavesdropped on data transmissions, he could then also decrypt the data. Thus, all messages are likely to be compromised during the span of the system. In this paper, we propose a new conference key distribution scheme with re-keying protocol in which all conference keys in a conference are different for each time period. Our goal is to minimize the potential damages over a public network. Once the time period has elapsed the participants in a conference cannot access any messages with previously used common keys. Therefore, if a user resigns from a conference and premeditatedly eavesdrops on later messages, he cannot decrypt the message with his old keys. Moreover, in our proposed scheme, we do not require a chairman (or trusted center) and any interactive protocols among all participants in order to construct the common conference key for each time period. It can be easily implemented to a dynamic conference key distribution system because other participants' information items of the system need not be immediately changed once a participant is added or deleted. [ABSTRACT FROM AUTHOR]

A dramatic increase in the development of technology-based teaching and learning has been witnessed in the past decade. Many universities and corporations have started to rethink the design and implementation of learning systems. In particular, these systems do not have powerful multimedia retrieval features for responding to student enquiries based on individual students' background and interests. In this paper, we present a SMIL-based approach to manage text, graphics, audios, and videos for incorporating computer games on personalized media-based course materials to satisfy the needs of individual students. In particular, we incorporate computer games in the personalized course materials so as to further promote learning interest, motivate thinking, and retain students learning on the Internet. The facilities and capabilities of user profiles, XML, game engine, and SMIL are incorporated and utilized in a prototype system that has been presented by RealOne on the PC platform. [ABSTRACT FROM AUTHOR]

This paper presents an efficient method to generate teacher's guidance and presentation materials for mathematical education, especially for solving simultaneous equations. Using XSL translations on presentation templates named the guidance plans and incorporating the output of a mathematical symbolic processor such as Maple, the presentation materials can be dynamically generated. [ABSTRACT FROM AUTHOR]

Due to the dramatic increasing of information on the Web, text categorization becomes a useful tool to organize the information. Traditional text categorization problem uses a training set from online sources with pre-defined class labels for text documents. Typically a large amount of online training news should be provided in order to learn a satisfactory categorization scheme. We investigate an innovative way to alleviate the problem. For each category, only a small amount of positive training examples for a set of the major concepts associated with the category are needed. We develop a technique which makes use of unlabeled documents since those documents can be easily collected, such as online news from the Web. Our technique exploits the inherent structure in the set of positive training documents guided by the provided concepts of the category. An algorithm for training document adaptation is developed for automatically seeking representative training examples from the unlabeled data collected from the new online source. Some preliminary experiments on real-world news collection have been conducted to demonstrate the effectiveness of our approach. [ABSTRACT FROM AUTHOR]

Syntactically different URLs could represent the same web page on the World Wide Web, and duplicate representation for web pages causes web applications to handle a large amount of same web pages unnecessarily. In the standard communities, there are on-going efforts to define the URL normalization that helps eliminate duplicate URLs. On the other hand, there are research efforts to extend the standard URL normalization methods to reduce false negatives further while allowing false positives on a limited level. This paper presents a method that evaluates the effectiveness of a URL normalization method in terms of page loss/gain/change and the URL reduction. Over 94 million URLs were extracted from web pages for our experiment and interesting statistical results are reported in this paper. [ABSTRACT FROM AUTHOR]

Deciding the relevance of Web pages to a query or a topic is very important in serving Web users. For clustering and classifying Web pages the similar decisions need to be made. Most of work usually uses positively related terms in one form or another. Once a topic is given or focused, we suggest using negative terms to the topic for the relevance decision. A method to generate negative terms automatically by using DMOZ, Google and WordNet, is discussed, and formulas to decide the relevance using the negative terms are also given in this paper. Experiments convince us of the usefulness of the negative terms against the topic. This work also helps to solve the polysemy problem. Since generating negative terms to any topic is automatic, this work may help many studies for the service improvement in the Web. [ABSTRACT FROM AUTHOR]

Molecular Modeling is based on analysis of three dimensional structures of molecules. It can be used in developing new materials, new drugs, and environmental catalyzers. We propose a molecular modeling system based on web services. It visualizes three dimensional models of molecules and allows scientists observe and manipulate the molecular models directly through the web. Scientists can examine, magnify, translate, rotate, combine and split the three dimensional molecular models. The real-time simulations are executed in order to validate the operations. We developed a distributed processing system for the real-time simulation.The proposed communication scheme reduces data traffics in the distributed processing system. The new job scheduling algorithm enhances the performance of the system. Therefore, the real-time simulation for molecular modeling can be exercised through the web. For the experiments, HIV-1 (Human Immunodeficiency Virus) was selected as a receptor and fifteen candidate materials were used as ligands. An experiment of measuring performance of the system showed that the proposed system was good enough to be used in molecular modeling on the web. [ABSTRACT FROM AUTHOR]

As face recognition algorithms move from research labs to real world product, power consumption and cost become critical issues, and DSP-based implementations become more attractive. Also, "real-time" automatic personal identification system should meet the conflicting dual requirements of accuracy and response time. In addition, it also should be user-friendly. This paper proposes a method of face recognition by the LDA Algorithm with the facial feature extracted by chrominance component in color images. We designed a face recognition system based on a DSP. At first, we apply a lighting compensation algorithm with contrast-limited adaptive histogram equalization to the input image according to the variation of light condition. While we project the face image from the original vector space to a face subspace via PCA , we use the LDA to obtain the best linear classifier. The experimental results with real-time input video show that the algorithm has a pretty good performance on a DSP-based face recognition system. And then, we estimate the Euclidian distances between the input image's feature vector and trained image's feature vector. [ABSTRACT FROM AUTHOR]

In this paper, a fast implementation of JPEG is discussed and its application to multimedia service is presented for mobile wireless internet. A fast JPEG player is developed based on several fast algorithms for wireless handset. In the color transformation, RCT is adopted instead of ICT for JPEG source. For the most time-consuming DCT part, the binDCT can reduce the decoding time. In upsampling and RGB conversion, the transformation from YCbCr to RGB 16 bit is made at one time. In some parts, assembly language is applied for high-speed. Also, an implementation of multimedia in wireless handset is described using MJPEG (Motion JPEG) and QCELP(Qualcomm Code Excited Linear Prediction Coding). MJPEG and QCELP are used for video and sound, which are synchronized in handset. For the play of MJPEG, the decoder is implemented as a SW upon the MSM 5500 baseband chip using the fast JPEG decoder. For the play of QCELP, the embedded QCELP player in handset is used. The implemented multimedia player has a fast speed preserving the image quality. [ABSTRACT FROM AUTHOR]

To support regional medicine in rural area of Hokkaido, we have tried to establish advanced medical information network system. At first we connected two rural town hospitals with SMU (Sapporo Medical University) and performed medical data transmission via the Internet. We used IPsec and regional Internet exchange (IX) for ensuring security and stability. As a second stage, we established a Metropolitan Area Network (MAN), a gigabit network with a 120 km radius in order to connect three medical schools (Hokkaido University, Asahikawa Medical College and SMU) with 10 hospitals. These experiments were performed with Internet technology such as VoIP (voice over IP), VPN, IPsec. As a third stage, we have coined VGN (Virtual Global Network) a concept, which includes IPv6 Topological Addressing Policy. According to the policy we established the IPv6 network to connect SMU with Obihiro area hospitals and a preschool for disabled children. Here, we described details of these experiments in terms of applications and network technologies. [ABSTRACT FROM AUTHOR]

One of the most expected applications of the human genome information is the development of genome medicine. Towards this goal, basic and applied biomedical laboratory researches and developments have been steadily in progress. However, clinical genome informatics and its applications in practice have been making slower progress compared to biomedical laboratory works. In order to facilitate the progress of clinical genome informatics and its powerful application to the development of genome medicine, the construction of the information infrastructure for genome medicine calls for urgent attention. In this paper, we propose the architecture of the information infrastructure for genome medicine. It is required to provide three essential features: security mechanisms, comprehensive information models, and intelligent analyzers. To implement these features, we employed PKI as the security mechanisms and the HL7 Version 3 as the information models. To analyze information, knowledge discovery tools are expected to be implemented in addition to a lot of clinical and genetic statistical functions. [ABSTRACT FROM AUTHOR]

A groupware that integrates synchronous and asynchronous collaboration paradigms is developed to support international medical collaboration activities carried out among Japan, Sri Lanka and other countries in Asia. Synchronous medical collaboration activities are facilitated through high-quality image transmission and through an interactive shared-workspace. A web based asynchronous collaboration environment facilitates file uploading, editing and reviewing functions. Provisions such as multi-stream session recording, enhanced object linkage of collaboration contents, and persistent data sharing, harness the integrated collaborative environment. Adaptive M-JPEG transmission, application level multicasting and mirrored database architecture enables efficient data transmission among heterogeneous groups connected through wide range of network channels. [ABSTRACT FROM AUTHOR]

Currently there is a common problem of real-time data inconsistency between source transactional systems and data warehouse. ECA, a well-known algorithm, is quite effective in addressing the view maintenance anomaly by making use of compensation queries. However, ECA does not maintain information about the data warehouse, and has to send compensating queries to the source system resulting in performance degradation. This paper proposes a new strategy for maintaining data warehouse in a Web environment without sending update queries to the source system. To maintain consistency in real-time, automatically installed web client program create modify queries for each update query to source system. Modify queries associated with each update query are processed at the web warehouse level without connecting to the source system. Hence the problem of a single modify query having to access multiple source systems disappears and the system performance improves. Through simulation, the performance of the proposed strategy is compared with previous solutions. [ABSTRACT FROM AUTHOR]

In contrast with the amount of explosively increasing information on the Web, mobile users are suffering from low hardware capacity, poor interface, and high communication cost of their wireless devices. In this paper, we propose a framework for information summarization on wireless network. More importantly, we have focused on the template generation based on ontology. This system, thereby, can extract and send particular pieces of information relevant to the corresponding users, instead of sending the full texts themselves. Templates can be generated by not only user's manual input but also semantic tagging, which is a process categorizing keywords into the most relevant concepts. Hence, in order to highlight a specific part of documents, these semantic templates can be applied as a set of rules. For conducting experiments, we have designed wireless reverse auction system in which participants can instantly send and receive the bidding messages through their mobile devices. [ABSTRACT FROM AUTHOR]

The World Wide Web is the most popular application of the Internet. Web retrieval latency is one of the most important issues in web services and applications. With the increasing number of digital materials appearing in web pages, there emerges a special issue regarding the acceleration of pages containing big web objects. Existing acceleration mechanisms are not effective in this aspect. In this paper, we propose a fine-grained Intra-Object Parallelism (IOP) to address this problem. Our results show that this mechanism can achieve significant improvement on retrieval latency for big objects. [ABSTRACT FROM AUTHOR]

Social networks that are built on top of the web, e.g., orkut[9], have been proliferating among online communities. We propose social internetworks, where essential functions of social networks are implemented on top of peer-to-peer networks. Participants and communities are connected through attribute queries and reputation queries; reputation queries are applied to attributes with Secure EigenTrust algorithm[1]. [ABSTRACT FROM AUTHOR]

To provide ontology-based context understanding services in the embedded application areas, efficient ontology document management schemes are required. Even though some related systems have been developed, they are not appropriate for the embedded system environment with some limitations on memory, disk space and computing power, such as home networking, telematics and intelligent robotics. In this regard, we have developed the embedded system-oriented OWL semantic document management system using the relational databases. We first design a relational data schema appropriate for the OWL documents and then develop a transformation mechanism to store OWL documents. Additionally, the RDQL semantic query processor is additionally implemented for the experiments. [ABSTRACT FROM AUTHOR]

Due to the changes in the wireless information environment, there has been an increased demand for various types of information. Accordingly, many wireless communication technologies have been studied and developed. In particular, studies on ubiquitous close distance communications are well underway. Lately, the focus has been on the Bluetooth technology due to its applicability in various environments. Applying Bluetooth connectivity to new environments such as ubiquitous or sensor networks requires finding new ways of using it. Thus, this research analyzed the vulnerability on the limited number of slaves in a piconet configuration through the current Bluetooth communication and proposed an expanded Bluetooth piconet formation method, regardless of the number of slaves inside the piconet even if it is not configured in a scatternet. In the proposed method, a security service was applied and the vulnerabilities of the current piconet configured as an expanded form of the current tree-shaped structure. Keywords: Mobile systems, Bluetooth piconet, Group Management. [ABSTRACT FROM AUTHOR]

To use mobile phone banking, we have to input personal identification number, account password and security card number. When it comes to the time of using wireless public key infrastructure practically, it will be equipped with the four-stage password input system by adding the certificate password. In this paper, we introduce DAS4M(Dynamic Authentication System for Mobile phone user) password system where the password could prevent from being exposed to other people during inputting. To discuss and simulate the validity of the proposed system, we develop a mobile application which is operable on the WIPI mobile platforms. The proposed system enhances the exposure rate of the password compared to the incumbent mobile phone banking password input system up to more than 84 times. Moreover, through the experiment with the usability which has the tradeoff relationship with the password security in terms of input time, error rate and user response, we can observe that it does not make a big difference as a result. [ABSTRACT FROM AUTHOR]

There have been cases reported for the new threats from mobile phone technologies and it has raised the awareness among the technology and antivirus vendors. Malicious programs such as Viruses, Trojan, and Worms have been created and targeted at mobile phone. This paper discusses the possible attacking model on mobile phone adapted from malicious attack on computer. It also presents the types of attack and appropriate solution model for mobile phone. A prototype of the simulation of malicious software and detection software on mobile devices is developed and the results of applying this approach to simulated malicious software and detection software on mobile device are also presented. [ABSTRACT FROM AUTHOR]

It is reported in the literature that a TCP connection with small window size achieves high throughput in wireless multihop networks. In this paper, we claim that TCP can benefit more from delaying ACK rather than limiting the window size. Since the induced delay may result in lengthy transfer time for short connections, we propose an adaptive delayed ACK algorithm at the receiver to enhance TCP performance. [ABSTRACT FROM AUTHOR]

Electronic Commerce (EC) has made rapid progress in recent years. Internet auctions have become especially popular in EC. Recently, Jiang-Pan-Li (JPL) proposed an improvement on Chang et al.'s efficient anonymous auction protocols in order to overcome the security weakness in the initiation phase of Chang et al.'s protocol. The current paper, however, points out that JPL's initiation protocol is inefficiently designed and then, two optimized initiation protocols are presented to resolve such problems. Keywords: Security, Auction protocol, Anonymity, Efficiency, Initiation protocol. [ABSTRACT FROM AUTHOR]

Stream Control Transmission Protocol (SCTP) is a new end-to-end transport protocol that is featured ‘multi-homing.' The mSCTP (mobile SCTP) is defined as SCTP with the capability of dynamic address reconfiguration. This paper describes a framework of mSCTP handover for supporting vertical handover between heterogeneous IP networks such as WLAN and 3G Cellular systems. We show some experimental results of the mSCTP vertical handover on Linux platforms. From the experimental results, we see that the handover latency of mSCTP depends on Round Trip Time (RTT) between two SCTP endpoints, possibly with the handover latency of 1 second below. [ABSTRACT FROM AUTHOR]

With the rapid advances of wireless and positioning technologies, an interest in LBS (Location-Based Services) is gradually rising. To provide LBS, tracking data should have been stored in database with the proper policies and managed efficiently. In this paper, tracking data management technique using topology is proposed. Tracking data is corresponded to the moving path of an object. In proposed technique, database is updated when moving object arrived at a street intersection or a curved road which is represented as the node in topology and we can predict the location at past and future with attribute of topology and linear function. In this technique, location data that are correspond to the node in topology are stored, thus reduce the number of updates of data. Also as using topology as well as existing location information, accuracy for prediction of location is increased than applying only linear function or spline function. [ABSTRACT FROM AUTHOR]

This study generally is purposed to implementation and usability evaluation of augmentative and alternative communication system (hereinafter referred to as an "AAC system"). Also the device is aimed as an AAC system using symbols for HCI, allowing a handicapped person to make a general communication with others in a free and convenient manner. This study specifically presents a method of predicting predictions, which contributes to reducing the size of the AAC system. This method includes selecting vocabulary and classifying it by domains so as to meet the characteristics of the AAC communication, using a noun thesaurus for semantic analysis, and building a sub-category dictionary. Accordingly, this study has verified the system by applying it to linguistically handicapped persons with different kinds of handicaps two times. [ABSTRACT FROM AUTHOR]