• Proceedings of the Korean Information Science Society Conference
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• 2001.10a
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• pp.775-777
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• 2001

지니 기술은 자바 프로그래밍 모델을 기초로 한 클라이언트가 동적으로 서비스를 찾아서 프래그 앤 플레이를 가능하게 해주는 기술이다. 홈네트워킹 환경에 이러한 기술을 적용하였을 때, 허가되지 않은 사용자들이 접근할 수 있어 네트워크 보안에 관한 문제가 발생한다. 또한 룩업서비스에 서비스를 등록한 정보 가전 시스템의 관리를 필요로 한다. 그래서 본 논문은 지니 룩업서비스에 사용자가 접근할 때 인증의 과정을 거치도록 하였고, 정보 가전 시스템의 관리를 위한 기능을 추가하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.763-764
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• 2012

Web Services are considered to be a promising technology to add a new level of functionality to the existing World Wide Web. However, despite the growing use of Web Services by many organizations, there are several issues that are slowing their deployment such as service discovery, recovery from faults and security. In this paper, we give a detailed overview of issues surrounding Web Services, discuss existing solutions and describe their limitations.

• KIPS Transactions on Computer and Communication Systems
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• v.1 no.2
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• pp.61-70
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• 2012

In this study we evaluate usefulness of InSciTe Advanced, technology opportunity service offering trends information related technologies by analyzing automatically large amount of data. Before developing the service, InSciTe Advanced, we design 5 main services - Trends and Predictions, Technology Levels, Relationship Paths, Roadmaps, Competitors and Collaborators - through the interviews with expert in planning R&D strategy. And we evaluate usefulness of each service in InSciTe Advanced to examine how the information analyzed by InSciTe Advanced are useful to user from two points of view, Satisfaction of Information and Completeness of Information. Users set a high value on 5 main services in all tis aspects, but give relative low grades to completeness of Information. We will learn lessons from this study, increase kinds and amount of data, and strengthen the process about accuracy and reliability of analyzed information from the service.

• Journal of Software Engineering Society
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• v.24 no.3
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• pp.101-110
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• 2011

Web Service which consists of SOAP, WSDL and UDDI is a software system that enables interactions of heterogeneous systems on networks with standardized XML message. Especially, UDDI is a registry for supporting the registration of a service by service publisher and discovery of a service by service requester. The preliminary studies are just about publishing and searching services. It presents the researches about UDDI study for improvement of searching a service and extended UDDI design for improvement of reusability with service components aspects. In this paper, we suggest not only features about publishing and searching services of existing UDDI system but also novel UDDI data structures and API for a reusable service model. In addition, we design and implement an extended UDDI system for publishing and finding the reusable services. Therefore, by using proposed UDDI systems, service developers reduce development costs and time through developing a service application reusing the already implemented services. In addition, it can expect to ensure the quality of services by reusing the proven services.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.5
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• pp.251-259
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• 2014

In this paper, we propose Low Energy Service Discovery (LESD) protocol for common discovery mode of IEEE 802.15.8 Peer Aware Communications (PAC). In order to minimize power consumption, Basic Repetition Block (BRB) is defined. Device is able to select operating mode and synchronize other devices through it. Proposed MAC procedure is Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) based on overhearing technique. Even if device has not been received response signal since transmitted request signal, it is able to discover other devices of same group through the overhearing technique. IEEE 802.15.8 PAC has required that performances of common discovery mode are presented about discovered devices during the simulation time, discovery latency and average power consumption. By considering the number of devices per group and channel environment, two scenarios are evaluated through system level simulation and the simulation results of proposed scheme are compared with CSMA/CA in same simulation conditions. As a result, proposed scheme is able to get high energy efficiency of devices as well as increase the number of discovered devices during simulation time when the longer the number of devices is distributed over a limited area.

• Journal of Digital Convergence
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• v.17 no.11
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• pp.531-536
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• 2019

The Ministry of the Interior and Safety amends the enforcement ordinance of the public service design method and applies it to the project tasks of each institution and cases of social problem solving and public service innovation are increasing according to service design methodology. This study is to develop the $360^{\circ}$ VR content element in order to deliver the understanding and effective improvement of the service to the consumers in the process of problem discovery and the prototype that visualize the key solution according to the service design methodology. By applying it to the actual public service design project, it was possible to predict the result with high satisfaction after improvement. This paper is meaningful in that it proposes new approach and empirical value to consumers and contribute to the improvement of the service design process as a convergence study on the future service design using the $360^{\circ}$ VR prototype.

• Journal of Korea Multimedia Society
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• v.16 no.8
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• pp.943-953
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• 2013

By the enormous increase in mobile nodes and diverse service requests on wireless networks, wireless mesh network(WMN) takes an interest as the solution for such requests. However, lots of issues which should be solved to deploy WMN are still remained. In the network layer, the performance improvement of routing protocols is the major issue of nowadays researches. WMN can be easily deployed by use of protocols for mobile ad-hoc networks(MANET) because it is much similar with MANET in multi-hop wireless routing and which node plays as host and router concurrently. Unfortunately, most routing protocols for MANET have drawbacks such as large traffic overhead and long delay time for route discovery due to the network extension. They are major factors of performance degradation of WMN and most researches are focused on them. In this paper, domain-based AODV which is amended AODV to be applied in hybrid WMN is proposed. The proposed scheme divides a hybrid WMN as several domains and performs route discovery by header layer domain. Therefore it can reduce the distance for route discovery as much as average hop count between domain header and member nodes. From the simulation, domain-based AODV was showed slowly increasing delay time due to the network extension.

• The KIPS Transactions:PartD
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• v.10D no.2
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• pp.327-336
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• 2003

Recently the rapid growth of Internet and the construction of high speed networks make many kinds of multimedia services possible. But most of current multimedia services are designed being by client/server model, which incurs high load of central server. In order to solve this problem, we propose a peer-to-peer network-based discovery mechanism for multimedia services. In the proposed scheme, mobile agents that have autonomy and mobility are used to search the location of resources. Use of mobile agents can solve the loss problem of the search result that occurs when the network is unsettled in pure peer-to-peer network. It also supports interoperability in heterogeneous system environments. In the proposed scheme, each host maintains the location information of resources which are locally requested or recently requested by other hosts. So, the proposed scheme has faster response time than the pre-existing mechanisms in pure peer-to-peer network environments.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.40 no.6
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• pp.581-585
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• 2016

Nowadays medical treatment service increase due to ageing population and improving the quality of life. Accordingly it is predicted that drug discovery market will expansion continuously. Therefore it is necessary that profit creation by drug discovery on the global market is important. HCS(High Contents Screening) has been emerging as a potential method to solve problems of the present drug discovery. This research is about liquid dispenser for HCS. The purpose of this research is to manufacture high performance liquid dispenser for HCS. The dispenser is designed to control 5 liquids separately. The liquid contact parts are designed disposably, biocompatibly and chemically inertly. Air curtain is equipped at the side of tip to dispense very small liquid volume and to prevent hanging drop on tip. Valving is performed by just controlling the pressure of the pressure driven pump without valve.

• Journal of the Korean Society for information Management
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• v.28 no.3
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• pp.13-30
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• 2011

Faceted navigation has brought a lot of changes to traditional library catalog and is one of the resource discovery interfaces in next-gen library catalog. Faceted navigation usually divides too much retrieved results into some relevant facets for user's convenient navigation. The faceted navigation of 9 libraries adopting resource discovery interfaces was analyzed in this article. The terms are much broader or different from the users' terms so that the users can't properly use the facets. It is essential to maintain consistency with using the terms to provide users with faceted navigation service and this study has found how exactly authority work was done in analysis of the author facets. Also, public libraries introducing faceted navigation need to consider including some facets for various users and university libraries need to consider detailed division of resource types.