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Knowledge Media Networking, 2002. Proceedings. IEEE Workshop on

Date 12-12 July 2002

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Displaying Results 1 - 25 of 29
  • Proceedings IEEE Workshop on Knowledge Media Networking

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    Freely Available from IEEE
  • Author index

    Page(s): 177
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    Freely Available from IEEE
  • Traffic control of haptic media in networked virtual environments

    Page(s): 11 - 16
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (366 KB) |  | HTML iconHTML  

    We present experimental results of traffic control of haptic media in a networked virtual environment. For the traffic control, we adopt dynamic temporal resolution control of haptic media. The control dynamically changes the packet transmission rate of haptic media according to the network load. By experiment, we evaluate the output quality of haptic media and demonstrate the effectiveness of the control. View full abstract»

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  • Knowledge management process model to develop knowledge strategies - how to design knowledge media networks for successful knowledge management

    Page(s): 93 - 98
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (491 KB) |  | HTML iconHTML  

    This paper represents the process model of knowledge management based on the results of a global benchmarking study. In organizations, we can find various "ba," such as cyberspace for a community of practice to gather and open physical space for collaboration beyond divisions. "Ba" develops circulation of knowledge and is the key to improving competitive advantage of organizations. When benchmarking was conducted in leading KM companies, we found that the method of utilizing "ba" was very logically adapted to the business strategy, which supported corporate culture for knowledge sharing. However, it is difficult for a corporation to implement appropriate "ba" that foster knowledge sharing and further gain competitive advantage of the corporation effectively. We analyzed the interrelation among approaches for sharing vision, supporting vital individuals, designing dynamic "ba, " connecting people, and promoting change to model these important factors for implementing knowledge strategies. This model shows the necessity of choosing a different approach to design "ba, including the design of IT, based on the knowledge strategy. View full abstract»

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  • Hand detection and tracking using pixel value distribution model for multiple-camera-based gesture interactions

    Page(s): 31 - 36
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2260 KB) |  | HTML iconHTML  

    We present a vision-based hand tracking system for gesture-based man-machine interactions and a statistical hand detection method. Our hand tracking system employs multiple cameras to reduce occlusion problems. Non-synchronous multiple observations enhance system scalability. In the system, users can manipulate a virtual scene by using predefined gesture commands. We propose a statistical method to detect hand regions in images using geometrical structures involved in the appearances of the target objects. Most conventional gesture recognition systems utilize a simpler method for hand detection such as background subtractions with assumed static observation conditions and those methods are not robust against camera motions, illumination changes, and so on. Our method can describe and recognize the appearances of hands based on geometrical structures. Experimental results show the effectiveness of our method. View full abstract»

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  • Adaptive data transmission on browsing of scanned documents using JPEG2000

    Page(s): 78 - 83
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (644 KB)  

    In this paper we propose an adaptive stream data transmission mechanism on transmitting and browsing the high-resolution scanned document images. We focus on a content delivery system for easily transmitting and browsing a large-scale of document image database such as newspapers, magazines, and in-house documents. We discuss the problems that remain for stream data transmission and describe the schemes of characteristic functions being used in our system. The JPEG2000 format is used to compress the scanned documents' images and moreover, layout analysis is employed to get the structure of each page. Our mechanism enables a web client to browse the such document images with the reality of flipping through a real paper document. Based on the characteristics of JPEG2000 format and the information of each page layout analysis result the web client can select an interested region to show detail even if on a small screen. We present a prototype of the implementation system and realize the high-speed document browsing in mobile web environment. View full abstract»

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  • Generating the 3D model of an object for realizing the 3D space-shared communication over the network

    Page(s): 37 - 42
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (727 KB) |  | HTML iconHTML  

    We aimed to develop a new 3D reconstruction system that provides the realization of 3D space-shared communication over the network. We would like to introduce our recent result on 3D model generation research. A multiple eye stereo camera system is basically applied in this research project. The model of an object is reconstructed using the depth images grabbed by the multiple eye cameras from different viewing angles. The reconstructed models of the reference object relative to the multiple views generate the complete 3D model. By using the communication system software, which is called NetUNIVERS, the reconstructed object can be shared among the multiple places. Furthermore, the space-shared communication space can be synthesized completely with the 3D information space through this research. View full abstract»

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  • A synchronization mechanism in networked virtual environment

    Page(s): 23 - 27
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (402 KB) |  | HTML iconHTML  

    We describe the design of a group synchronization mechanism for a local area network virtual environment and introduce a step synchronization mechanism. We use a football game to evaluate this mechanism. In this football game, users can share a virtual space where they can move around, dribble and shoot. To achieve synchronization among users, a client of the game exchanges data through a server within a certain period time. A problem of such a system is that all users should share the space in the same time for justice competition. But because of the different capacity of computers and the time cost of the communication between clients, it is difficult for all clients to update the virtual space simultaneously. In our systems, we introduce a waiting time synchronization mechanism. To evaluate our proposed architecture and mechanisms, we make a series of experiments in our local area network and then build and analyse the model of our system. View full abstract»

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  • Incremental PDFA learning for conversational agents

    Page(s): 161 - 166
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (300 KB) |  | HTML iconHTML  

    When finite-state machines are used for dialogue models of a conversational agent, learning algorithms which learn probabilistic finite-state automata with the state merging method are useful. However these algorithms should learn the whole data every time the number of example dialogues increases. Therefore, the learning cost is large when we construct dialogue models gradually. We proposed a learning method which decreases the number of compatibility checks by caching the merging information, and evaluated it and the perplexities of learned models. From the comparison among the dialogue models, the method which caches only the compatibility-changed states reduced the total number of compatibility checks by 13%. We also applied the algorithm to an actual conversational agent. View full abstract»

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  • Composing a multimedia service by plural terminals in ubiquitous networks

    Page(s): 57 - 62
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (843 KB) |  | HTML iconHTML  

    It is a challenging task to develop a high quality and secure multimedia service for mobile terminals used in the ubiquitous computing environment. One of the issues is the resource limitation of mobile terminals. We present a multimedia service composition scheme for sharing computer and communication resources by using terminals to compensate for this resource limitation. The proposed scheme is based on user authentication, service access control, and the multi-agent-based adaptive QoS control framework that we developed. We also propose a novel access mode control based on the trustworthiness of users and extension of the multi-agent-based adaptive QoS control framework to many users. Focusing on the home network as a typical ubiquitous network, we implement a prototype testbed system and show experimental results for the multimedia service composition. View full abstract»

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  • Dynamic multi-agent architecture for multimedia multimodal dialogs

    Page(s): 107 - 113
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (326 KB) |  | HTML iconHTML  

    There is a real need for clear and sound design specifications of dynamic architecture for multimedia multimodal dialogs. These specifications must take into account the dynamic aspect in order to satisfy quality attributes such as adaptability, maintainability and understandability. Multimodal systems featuring fusion for natural human-computer interaction involve complex intelligent architectures to handle unexpected errors and mistakes made by users. These architectures should react to events that occur simultaneously with eventual redundancy from different input media. In this paper, dynamic based intelligent agent architectures for multimedia multimodal dialog protocols are proposed Global agents are decomposed into relevant sub-agents, called components. Each sub-agent is modeled separately. Timed colored Petri nets are used to specify the structure and behavior of each agent in our architecture and to prove that this architecture satisfies the desired structural and behavioral properties. This paper describes work in progress and presents a sound idea of designing dynamic architecture using agents for multimedia applications. View full abstract»

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  • Augmenting the knowledge bandwidth and connecting heterogeneous expert communities through uncovering tacit knowledge

    Page(s): 87 - 92
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (652 KB) |  | HTML iconHTML  

    This paper presents an approach to exploring how implicit knowledge structures in different communities of experts can be discovered, visualised and employed for semantic navigation of information spaces and construction of new knowledge. The focus is on the developed conceptual model and system for creation and collaborative use of personalised learning knowledge maps. The developed prototype combines semantic text analysis with machine learning and interfaces for visualising relationships and creating new knowledge structures. Application scenarios include automatic generation of personalised knowledge portals, collaborative semantic exploration of complex information spaces and construction of shared ontology networks. The real-world testbed and context of development is the Internet platform netzspannung.org that aims at establishing a knowledge portal connecting digital art, culture and information technology. View full abstract»

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  • Communicative reality for social intelligence design

    Page(s): 3 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1383 KB) |  | HTML iconHTML  

    Social intelligence design is a new research area aimed at designing new computer-mediated communication systems based on in-depth understanding of intelligence as a social phenomenon. I describe the motivation underlying research into social intelligence design and conversational intelligence, and present a novel approach to community support systems that puts particular emphasis on the use of conversation in mediating interpersonal communications. View full abstract»

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  • Intrusion detection using mobile agents in wireless ad hoc networks

    Page(s): 153 - 158
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (363 KB) |  | HTML iconHTML  

    In this paper we propose a distributed intrusion detection system for ad hoc wireless networks based on mobile agent technology. Wireless networks are particularly vulnerable to intrusion, as they operate in open medium, and use cooperative strategies for network communications. By efficiently merging audit data from multiple network sensors, we analyze the entire ad hoc wireless network for intrusions and try to inhibit intrusion attempts. In contrast to many intrusion detection systems designed for wired networks, we implement an efficient and bandwidth-conscious framework that targets intrusion at multiple levels and takes into account the distributed nature of ad hoc wireless network management and decision policies. View full abstract»

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  • A novel architecture of Home gateway for efficient packet process

    Page(s): 63 - 67
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (295 KB) |  | HTML iconHTML  

    In this paper a novel architecture for Home gateway is proposed. In the home networking system, there exist many different kinds of data types, such as audio, video, and control information. The communication spans multiple networks, such as Bluetooth, wireless LAN, USB, IEEE1394, and Power Line Communication (PLC). The hardware architecture of the Home gateway presented in this paper is based on ISO/IEC JTC I/SC 25/WG 1. The packet processing architecture proposed in this paper takes into account the characteristics of the home network environment so that the packets in the home network are processed very efficiently. The proposed Home gateway is implemented using ARM7TDMI and VxWorks. View full abstract»

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  • Construction of network system and the first step of summarization for human daily action data in the sensing room

    Page(s): 17 - 22
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1157 KB) |  | HTML iconHTML  

    This paper describes the: 1) construction of a network system for measurement and accumulation of sensor data in a room equipped with sensors; and 2) proposition of a summarization algorithm as the first step of analysis for the accumulated data. The network system is constructed via distributed object technology. The network has a module structure and three layers for easy integration of a large amount of sensors. The accumulation system is also created for an application. The accumulation is performed over the long term to analyze the human daily action data. The summarization algorithm focuses attention on the changes of the sensor data in the room. The summarized data is useful for grasping the room states at a glance. View full abstract»

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  • Effect of mobility on teletraffic characteristics in a cellular system using terminal-to-terminal communication

    Page(s): 68 - 73
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (273 KB) |  | HTML iconHTML  

    This paper considers a new cellular mobile communication system, where a terminal can directly communicate with another terminal. Though there is a theoretical technique to analyze teletraffic characteristics of the system, this technique assumes that nodes never move. So, to analyze the teletraffic characteristics of this system considering mobility, computer simulation is usually used. This paper proposes a technique to theoretically analyze the call arrival rate, the mean holding time and the offered traffic in the new cellular system considering mobility. This paper assumes that the system consists of a single cell, terminals move along a single route and some channels are reserved for terminal-to-terminal communications. View full abstract»

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  • Dynamic semantics of cognitive agent language

    Page(s): 171 - 176
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (394 KB) |  | HTML iconHTML  

    I propose a language of cognitive agents and its formal semantics by exploiting the idea of dynamic semantics. The language is an extension of first-order concurrent dynamic logic (CDL). In this semantics, the expressions of the language are interpreted as actions or state transitions of private viewpoint models (PVM), which are models of environments recognized by a cognitive agent, are based on ecological realism, and are modeled by a metaphor of cameras and camera works. The invariance of truth of motion independent of viewpoints, actions on viewpoint resettings and empathizing with other agents can also be treated with this language and semantics, which give us a formal basis of communications between cognitive agents on recognized contents and how to recognize them. View full abstract»

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  • Exploring JXTASearch for P2P educational media discovery

    Page(s): 147 - 152
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (531 KB) |  | HTML iconHTML  

    In this paper we present a peer-to-peer (P2P) application that aims at improving the discoverability of educational media typically distributed over different universities and institutions. We investigate JXTASearch, a distributed search engine constructed on Sun's open source P2P platform JXTA, and further extend it to support Dublin Core Metadata Element Set (DCMES) based P2P searches. While the JXTA platform provides essential interoperability among various peers at the "network" level, DCMES constitutes the minimal interoperable basis for educational media discovery at the "metadata" level. We then discuss the advantages and shortcomings of our prototype implementation, as well as future work building upon our experience with the prototype. View full abstract»

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  • Psychological effects of participations on the networked community

    Page(s): 74 - 77
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (236 KB) |  | HTML iconHTML  

    In this paper, we report the experiment to evaluate Public Opinion Channel (POC) by standardized scales for measuring human's needs (or intentions) of information-behavior. The results showed that members of POC community are satisfied with the need to acquire information, and POC is superior to BBS on this point. In the future, we need to construct standardized scales for measuring trait-needs and state-needs. View full abstract»

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  • Proactive information supply for activating conversational interaction in virtual communities

    Page(s): 167 - 170
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (267 KB) |  | HTML iconHTML  

    This paper describes a method for activating conversational interaction in virtual communities. Our method supplies information proactively to promote utterances of participants. The notion of subjective usefulness of information is introduced to guide conversation effectively so that the participants can obtain or exchange useful information. We implemented an agent that employs our method and conducted the experiments to verify validity of our method. As a result, we found that our method was able to activate conversational interaction and assist participants in obtaining or exchanging useful information. View full abstract»

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  • The responsibility management system for collaborative meeting scheduling in the Distributed System Engineering project

    Page(s): 114 - 119
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1035 KB) |  | HTML iconHTML  

    This paper presents a role-based cooperative session scheduling system and its application to the cooperation scenario of the DSE project for design review activities in the space domain. Our approach allows generic group definition. In contrast to identity-based group definition we use a role-based approach, allowing exceptions due to changes of identities and locations to be handled. Our solution relies on open generic groups and has two advantages. On one hand, it allows dynamic sessions to be managed, allowing evolution of the supported activities. On the other, it allows an invitation mechanism to be implemented as in traditional planning-based session management systems. View full abstract»

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  • A proposal of related information providing system on distributed VOD

    Page(s): 43 - 48
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (403 KB) |  | HTML iconHTML  

    Self-learning using the Internet can acquire not only concepts pertaining to the purpose of investigation, but also knowledge that is related to them, discovered in the process of investigation. As a result, we can learn a wide range of related knowledge free will. However in existing VOD (Video On Demand) systems, there is no function available to effectively combine and provide texts, pictures and videos, nor can the related knowledge be acquired. Therefore, in this paper in order to make it easy to learn both the video contents and the knowledge related to them, we developed a system to extract related information, such as keywords suitable for the video contents and their related words, and we built an interface to efficiently view those related information and videos. Moreover in consideration of the distributed VOD server we clearly describe the relations between video keywords, their related words through XML/RDF in a standardized, interoperable manner for sharing and combining of information. View full abstract»

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  • PDA Watch for mobile surveillance services

    Page(s): 49 - 54
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (501 KB) |  | HTML iconHTML  

    Delivering real-time surveillance services to handheld devices over the Internet is an interesting application in mobile environments. Developing such system necessitates tackling considerable design challenges including device shortcomings, platform heterogeneity and bandwidth limitation. In this paper we present a Java-based approach for developing a mobile surveillance system which allows PDA users to overcome these challenges. This approach applies emerging Java technologies including J2ME, RMI, and JMF for mobile computing, handheld devices, distributed computing, and multimedia computing. To achieve the thin-client goal in the post-PC era, a textual-based application-level communication protocol is also designed. We demonstrate the effectiveness of our design approach via actual experimentations on the Palm PDA. With the advent of J2ME standardization, our system is expected to be generically applicable to various handheld and mobile devices. View full abstract»

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  • How to evaluate networked communication tools

    Page(s): 140 - 144
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (771 KB) |  | HTML iconHTML  

    This paper presents a new approach to evaluate networked communication tools that support or facilitate communications for community members. We propose a standardized scale based on psychological scaling of human need. We report the progress of evaluation of Public Opinion Channel (POC) within the framework of social intelligence. View full abstract»

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