• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.19 no.12
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• pp.1394-1401
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• 2008

This work investigates the effects of vibration on the passive intermodulation distortion characteristics of base station antennas for 800 MHz CDMA mobile communication systems. In general, base station antennas are located at high positions such as on building rooftops or iron towers. Thus the antennas are always affected by random vibrations, coming from various natural environmental factors such as rain and wind, or from living environmental factors such as vehicles and trains passing by. The measured intermodulation distortion characteristics before and after vibration accelerated degradation test show that vibrations are indeed the main cause for the intermodulation distortion performances of such antennas. To minimize the effects of vibrations, a new antenna design isptoposed that has an improved tolerance for vibrations. Experimental results show that the proposed antenna design dramatically reduces the degradation of the intermodulation distortion more than 35 dB.

• Journal of KIISE:Software and Applications
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• v.34 no.10
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• pp.910-917
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• 2007

Of the possible interactions between human and robot, touch is an important means of providing human beings with emotional relief. However, most previous studies have focused on interactions based on voice and images. In this paper. a method of recognizing human touching behaviors is proposed for developing a robot that can naturally interact with humans through touch. In this method, the recognition process is divided into pre-process and recognition Phases. In the Pre-Process Phase, recognizable characteristics are calculated from the data generated by the touch detector which was fabricated using force sensors. The force sensor used an FSR (force sensing register). The recognition phase classifies human touching behaviors using a multi-layer perceptron which is a neural network model. Experimental data was generated by six men employing three types of human touching behaviors including 'hitting', 'stroking' and 'tickling'. As the experimental result of a recognizer being generated for each user and being evaluated as cross-validation, the average recognition rate was 82.9% while the result of a single recognizer for all users showed a 74.5% average recognition rate.

• The Journal of Korean Association of Computer Education
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• v.10 no.6
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• pp.51-59
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• 2007

According to developments in info-communication, the recent educational paradigm asks not for a passive transmitter but an active constructor who can solve a variety of complicated problems in real situations. Such a change asks for an educational setting which includes sharing ideas and information rather than simply possessing them. Learning through presentation has many problems including few presentation opportunities as well as the reuse of presentation data. This study suggests such strategies as promoting interactions through presentations and the practical use of these strategies in class. For this, the role of the presentation data provider and learner, and strategies to implement the step by step learning support system have been suggested. Using presentations, as described in this study, allow for communication with students outside the original class time and location. The degree of learning students experience through presentations is expected to be high.

• Journal of the Korean Society for Library and Information Science
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• v.49 no.3
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• pp.371-392
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• 2015

This research attempted to provide new philosophical perspective to be taken in the public libraries as an institution which should support the social inclusion in the multicultural society. As deepening on dichotomous system of culture in modern society, It is referred to the need for an intercultural discourse on mulitcultural services in the public libraries. The process of social Integration suggested by Esser indicated the interactive transformation between actors and society. The conception serves the standard perspective on immigrants. Accordingly, This research analyzed a multicultural program of public libraries based on the classification of policy about immigrants by Castles. And it is based on the intercultural philosophy of Mall, It suggested the roles of public libraries in social integration and the process to support immigrants through the framework by Esser.

• Journal of Korea Society of Industrial Information Systems
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• v.28 no.1
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• pp.9-16
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• 2023

The importance of team activities increases as the problem to be solved in the industrial field become more diverse and complex. Team performance is not simply the sum of team members' performances, but synergies are gained or reduced depending on the team's interactions. Analytical research on team activities using ICT has been conducted, but developing and utilizing these technologies is time-consuming and costly, making it difficult for field practitioners and researchers to utilize them. In this study, we design a system that collects interaction information during conversations at a low cost using Arduino and Raspberry Pi and verify that conversation interaction information is collected from multiple devices and correctly stored in the database. Through the low-cost information collection system proposed in this study, we intend to create an environment where follow-up research can be conducted in various fields of industrial information.

• Journal of the Korean Society for information Management
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• v.39 no.2
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• pp.159-202
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• 2022

The 'National Research Data Platform' and the 'Bio Research Data Platform' were recently built and each is actively creating an ecosystem. It is built independently based on other metadata standards, which may cause future interoperability issues. The purpose of this study is to propose a basis for metadata interoperability between the two platforms. To this end, the metadata standards of each platform were analyzed, crosswork targets were selected and mapped, and the suitability of the mapped elements was verified through experts in the bio field. And more appropriate mapping elements were recommended to derive metadata elements for datasets and files. Through this, it was possible to confirm the possibility that the metadata of each platform could be semantically linked and the basis for securing interoperability.

• Journal of Korean Society of Archives and Records Management
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• v.23 no.4
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• pp.159-178
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• 2023

A digital archive is an online platform for preserving and utilizing digital records worthy of continued preservation. However, there are no shared standards for functionality, metadata, or data technical principles across digital archives in Korea. These issues create challenges in linking distributed digital records. This study proposes a common vocabulary for digital archives to enhance the interoperability of digital records and evaluates the interoperability of the digital archive built with the common vocabulary. We collect and analyze data from the digital archive on the Korean financial crisis of 1997 to construct a knowledge graph and compare its interoperability with the knowledge graph built with RiC-O. The archive and the knowledge graph underwent evaluation using the FAIR data principles evaluation framework. The constructed knowledge graph links various objects in the archive and provides contextual information to aid in understanding the archive. The results demonstrate that a knowledge graph built with a common vocabulary significantly improves the linkage, search, and interoperability of digital records compared to a traditional archive.

• The KIPS Transactions:PartC
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• v.8C no.2
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• pp.221-233
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• 2001

오늘날 이동 에이전트 기술은 네트워크 트래픽을 효과적으로 줄이고, 서버의 인터페이스를 바꾸지 않고 클라이언트의 다양한 요청을 융통성 있게 서비스할 수 있는 기술로 여겨지고 있다. 그러나 대부분의 이동 에이전트 시스템들은 그들 자신의 구조를 적용하고 다른 방법으로 구현되어, 특정 이동 에이전트 시스템에서 생성된 이동 에이전트는 다른 에이전트 시스템에서는 사용될 수 없다. 이러한 문제를 해결하기 위하여 OMG(Object Management Group)는 이질적인 에이전트 시스템간의 상호운용선(interoperability)을 증진시킬 목적으로 이동 에이전트와 에이전트 시스템간의 공통된 개념적인 모델에 대하여 기술한 MAF(Mobile Agent Facilities) 명세를 제안하였다. 본 논문에서는 OMG MAF 명세를 만족하는 자바 기반의 SMART 시스템에 관하여 기술한다. SMART 시스템은 MAF 명세에 따른 이동 에이전트간의 상호운용성을 지원하고, MAF 명세에서 권장하는 보안 모델을 기반으로 한 독자적인 보안 기능을 제공한다. 또한 보다 안정된 에이전트 시스템의 운영을 위하여 자체적인 에이전트 및 에이전트 시스템의 영속성(persistence)과 예외처리를 지원한다.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11c
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• pp.2239-2242
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• 2002

현재 인터넷상에서 기업간(B2B) 비즈니스를 수행하는 많은 기업들은 자신들의 비즈니스 시스템들이 타 기업의 비즈니스 시스템과 상호운영이 안됨으로 인하여 시장 확장에 많은 어려움을 겪고 있다. 이런 상호운영의 문제점들을 해결하기 위하여 비즈니스 시스템 개발 회사들과 이용 회사들은 비즈니스 시스템들의 상호운영을 위한 e-비지니스 공용 프레임워크의 표준 스펙인 eCo와 ebXML, 로제타넷 스펙들을 개발하여왔다. 본 논문은 ebXML 환경에서의 e-비즈니스 응용 시스템 개발에 필요한 BPSD(Business Process Specification Document)과 비즈니스 프로세스 처리 엔진 개발 방법 및 CC(Core Coponents) 기반의 XML 비즈니스 문서 저작 도구의 구현에 필요한 스펙의 분석 및 설계에 대한 내용을 기술하고 있다.

• 한국HCI학회:학술대회논문집
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• 2007.02b
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• pp.612-619
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• 2007

컴퓨터의 공손성은 사용자에게 심리적으로 긍정적인 영향을 미칠 수 있는 중요한 요소이다. 본 연구는 사용자와 에이전트의 상호작용에서 에이전트의 언어적 메시지에 사용된 공손전략과 에이전트에 대한 지각된 친밀성이 이 에이전트 평가, 사용자 경험, 메시지의 지각된 공손성에 미치는 영향에 대해 알아보았다. 실험은 2(지각된 친밀성)${\times}2$ (적극적 공손 전략)${\times}2$ (소극적 공손 전략) 완전요인 설계로 실시되었다. 실험 결과, 사용자들은 에이전트가 적극적, 소극적 체면을 존중해 주는 공손 전략을 사용하였을 경우 에이전트를 보다 긍정적으로 평가하고 상호작용을 긍정적으로 경험하였으며, 메시지가 공손하다고 지각하였다. 또한 이러한 효과는 에이전트에 대한 지각된 친밀성 정도에 따라 다르게 나타났다. 친밀한 에이전트와 상호작용하였을 경우 적극적 체면을 위협하는 메시지의 부정적 효과가 완화되었으며 소극적 체면을 존중하는 간접적인 화법의 메시지보다 직접적으로 요구를 전달하는 소극적 체면을 위협하는 메시지가 긍정적으로 평가되었다. 이 결과는 에이전트 메시지에 공손전략을 부여하는 것이 에이전트에 대한 호의적 평가와 긍정적 사용자 경험을 이끌어낼 수 있음을 보여주는 것과 동시에 사용자와 에이전트의 관계 발달 정도에 따라 에이전트 메시지에 사용된 공손 전략의 설계가 변화해야 한다는 것을 시사한다.