• KSII Transactions on Internet and Information Systems (TIIS)
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• 제5권5호
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• pp.909-937
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• 2011

Energy efficiency is one of the most critical issues in the design of wireless sensor networks. In object-tracking sensor networks, the data storage and query processing should be energy-conserving by decreasing the message complexity. In this paper, a Prediction-based Energy-conserving Approximate StoragE schema (P-EASE) is proposed, which can reduce the query error of EASE by changing its approximate area and adopting predicting model without increasing the cost. In addition, focusing on reducing the unnecessary querying messages, P-EASE enables an optimal query algorithm to taking into consideration to query the proper storage node, i.e., the nearer storage node of the centric storage node and local storage node. The theoretical analysis illuminates the correctness and efficiency of the P-EASE. Simulation experiments are conducted under semi-random walk and random waypoint mobility. Compared to EASE, P-EASE performs better at the query error, message complexity, total energy consumption and hotspot energy consumption. Results have shown that P-EASE is more energy-conserving and has higher location precision than EASE.

• 한국산업정보학회논문지
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• 제14권3호
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• pp.44-49
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• 2009

본 논문에서는 ZigBee를 이용한 모바일 단말 및 리더기를 설계하고 개발된 리더기와 단말기 사이의 통신 프로토콜을 설정한다. 그리고 zigbee 단말기에서 전송하는 데이터를 호스트에서 수집, 가공 및 처리할 수 있는 정보시스템을 구춘한다. 모바일 단말은 라우터 또는 엔드 포인트 역할을 수행하며, 리더기는 코디네이트 역할을 수행한다. 본문에서 소개하는 단말과 리더기는 하드웨어적으로 구성이 같다. 지그비 모듈은 RadioPulse 사의 MG2455-F48 모듈을 사용하였다.

• 경영과학
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• 제14권2호
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• pp.199-223
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• 1997

This paper represents an exploratory effort to test empirically the contingent relationships between the contextual variables, such as user task characteristics and personality, and the information characteristics of Accounting Information Systems (AIS), and to prove the effects of influence factors on the increase of personal office productivity. In this study, it was suggested that personal office productivity is influenced by the fit between the contextual variables and the information dimensions of ALS. It was also proved that influence factors have a positive effect on the increase of personal office productivity.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1007-1012
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• 2004

To increase the productivity and efficiency of an enterprise, all relevant product information should be provided to shop floor workers timely and in a unified form because shop floor workers are final consumers of most accumulated information generated from various departments of an enterprise. but, most existing enterprise information systems have an emphasis upon providing design/manufacturing information to office workers. Proposed in this study is a development of integrated design/manufacturing information system focused system, the function required for shop floor activities. For developing integrated information system, the functional required for shop floor are identified and analyzed. Based on the extracted functional requirements, object-oriented system design and implementation is conducted. By using this system, shop floor workers can refer to all relevant information necessary to their work easily and in a integrated form.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2002년도 추계공동학술대회
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• pp.417-422
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• 2002

네트워크와 인터넷의 급격한 성장과 함께 기존의 많은 소프트웨어들이 웹 기반으로 그 모습을 변화하고 있으며, 이로 인해 웹 어플리케이션의 복잡성이 증가되고 개발에 있어 많은 비용과 인력이 소요되고 있다. 하지만 아직까지 웹 어플리케이션을 위한 명확한 개발 환경이 정의되지 않았으며 대부분이 경험에 입각하여 나름대로 개발하고 있는 실정이다. 따라서 웹의 특성을 잘 반영하는 개발 환경의 구축이 무엇보다 중요시된다. 본 논문에서는 웹 환경의 특성을 파악하여 웹 어플리케이션 개발에 적합한 프로세스를 정의하고 이에 따라 모델링 할 수 있는 환경을 제시한다. 또한 모델링 결과를 바탕으로 자동으로 소스코드를 생성한다. 결국 분석과 설계 단계에서 발생되는 결함을 줄여 품질을 향상하고, 개발하는데 드는 시간을 줄여 생산성을 향상함으로써 빠르게 변화하는 웹 환경에 능동적으로 대처하고자 한다.

• 한국정보시스템학회지:정보시스템연구
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• 제25권1호
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• pp.25-47
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• 2016

Purpose In this study, the relationships among environmental information exchange with suppliers(EIES), green collaboration with suppliers, green learning by environmental information, the adoption of green supply-chain management techniques(AGSMT) (i.e., the green purchasing, product design and production, and the recovery of extra facilities and inventories), environmental performance, and the organizational performance of a firm were empirically investigated. Design/methodology/approach Data for this study were drawn from a survey of the current status of EIES levels and AGSMT usage observed in Korean manufacturing firms. In total, 500 organizations were randomly selected from a population of about 1,000 firms that are listed on the Korean stock market. In order to collect empirical data, this research administered questionnaires with the sample firms. Only chief production executives were selected as respondents. A questionnaire with a cover letter was mailed to each respondent. The survey was conducted during a 3-month period between March 2015 and June 2015. Finally, 78 valid data of the sample firms were collected. Findings The results of this study showed that EIES positively affects the green corporation and learning. According to the results, it was observed that both green corporation and green learning have a positive impact on the levels of AGSMT(i.e., the green purchasing, product design and production). It was also demonstrated that AGSMT has a direct positive impact on environmental performance. In examining the effects of environmental performance on the organizational performance of a firm, significant impact was found.

• 한국생산제조학회지
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• 제22권6호
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• pp.1025-1031
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• 2013

A library of parametric CAD models should be provided for the reuse of design data in configuration design. Mechanical products have many options and parameters, which in turn, require a large number of CAD models for configuration designs. Existing methods for library construction are limited in their ability to decrease the number of CAD models and ensure independency between the configuration design system and the library. To solve these problems, we propose a method that controls a CAD library based on part-shape information model, and also present its technical details. To verify the proposed method, a CAD library for bicycles was constructed and design modification experiments using a prototype part-shape controller were performed. From the experiments, we found that the proposed method can effectively decrease the required number of CAD models by reusing models for configuration designs.

• 시스템엔지니어링학술지
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• 제17권1호
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• pp.107-113
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• 2021

Plant Configuration Management(CM) is an activity to maintain consistency of design requirements, physical configuration, facility configuration information throughout the life cycle of the plant by systematically managing changes that occur during the plant design and operation process. Conformity between information must be ensured not only in the design stage, but also in the case of design changes in the operation and maintenance stages, and thus a computer system capable of efficiently managing them is required. In particular, in consideration of an application to small and medium-sized domestic plants, a computer system that can support configuration management at a low cost is needed. Accordingly, in this study, a configuration management system has been developed to support the management of plant design information and change procedures in the operation stage of small and medium-sized plants. Here, a case for quantitatively evaluating the effectiveness of the developed system is described.

• 경영정보학연구
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• 제9권1호
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• pp.215-231
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• 2007

최근 중앙부처 및 지방자치단체 등 공공부문에서 성과관리의 중요성이 강조되면서 BSC 등의 성과관리 시스템 구축이 활발히 진행되고 있다. 그러나 민간부문과 달리 공공부문은 비영리 조직이라는 특성상, 그리고 다양한 이해관계자들이 존재하기 때문에 성과관리 시스템 구축 시 많은 어려움이 있다. 본 연구의 목적은 정보통신부의 전략적 성과관리 시스템에 대한 연구를 통해, 업무특성에 맞는 성과관리 시스템 구축에 대한 선진사례를 도출하여, 공공부문에서 BSC 등의 성과관리 시스템을 구축 시 발생하는 문제점들에 대해 효과적으로 대처하고 벤치마킹 할 수 있는 방안을 제공하는데 있다. 사례대상 공공기관(정보통신부)의 성과관리 연구는 국내 공공부서에 적합한 성과관리 방법론 도입과 시스템 구축에 효과적인 지침서가 될 수 있을 것이며, 현재 공공부문에서 BSC를 구축 할 때 발생하는 여러 문제들에 대하여 효과적인 방안을 제시할 수 있다는 데에 연구의 의의를 둘 수 있다.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2003년도 춘계학술발표논문집 (하)
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• pp.1909-1912
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• 2003

공개키 암호화와 X.400 프로토콜 그리고 PGP상에 존재하는 메시지 인증 문제를 해결하기 위하여 NMAP로 명명된 인증된 실체기반 암호화 시스템을 제안하고 이를 선계 구현하였다. 제안된 시스템은 전자상거래의 활성화와 비대화형 인증 서비스 제공에 사용될 수 있을 것이다.