• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 1996년도 춘계공동학술대회논문집; 공군사관학교, 청주; 26-27 Apr. 1996
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• pp.204-208
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• 1996

일반적으로 한 제품은 원자재로부터 중간의 여러 단계의 공장을 거쳐 최종 완제품으로 시장에 선보이게 된다. 이러한 다공장 구조에서는 제조기업 전체차원, 하부 공장차원, 단위작업장 차원을 유기적으로 연결하여 생산계획 및 생산통제를 담당하는 운영시스템이 필요하다. 본 연구에서는 Jacobson[2]의 Use Case Driven기법을 이용하여 이러한 다공장의 계층적 구조를 가진 생산계획및 통제시스템에 대한 객체지향적 분석 및 설계을 수행하였다. 우선 각 계층의 시스템에 대하여 Actor와 Use case를 도출하였다. 그리고 도출된 Use-case로 부터 객체를 규명하여 시스템에 대한 분석모델을 수립하였다. 또한 주요 Use-case를 규명된 객체간의 메시지 교환과 통제의 이행과정을 통하여 표현함으로써 시스템의 객체지향적 구현의 기반을 구축하였다.

• 산업공학
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• 제11권1호
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• pp.1-14
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• 1998

Various problems on logistics systems have been dealt with recently as research issues since they were regarded critical for taking up a better position in the increasingly competitive global market. In particular, the freight transportation is considered as a key factor which affects the economic competitiveness of a whole nation as well as the production cost of individual companies. The objective of this study is to identify main issues and review recent foreign and domestic studies related to the freight transportation. The studies are classified into two categories according to the hierarchical level in the decision making process: infra structure design and transportation strategies, service design and operation. Main issues are introduced with a brief review on the related literature and methodologies applied.

• Asia pacific journal of information systems
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• 제8권2호
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• pp.85-104
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• 1998

It is assumed that employees' ethical judgements and attitudes in handling personal and organizational information differ, depending upon their hierarchical ranks in organizations and types of information. Therefore we investigated how differently employees at different ranks judge hypothetical behaviors(or situations); their manner of handling various types of information in their daily activities in business organizations. Sixteen hypotheses based on combinations of 3 ethical areas and 5 information types were developed and tested. We found that three management ranks have shown significantly different ethical attitude about i)the accessibility to strategic planning and managerial information and ii)the property of managerial, operational and informal information. This research can help organizations to design better education programs and ethical codes to guide employees who process sensitive information.

• 한국지능시스템학회논문지
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• 제19권1호
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• pp.69-74
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• 2009

본 논문에서는 온톨로지에 기반한 자율주행 로봇의 제어 방법을 제안한다. 제안한 방법은 온톨로지를 단순히 정보의 체계적인 저장소로 이용하는 것에서 벗어나 온톨로지 추론을 통해 로봇을 제어한다. 즉, 로봇이 감지한 장애물 정보를 온톨로지로 표현하고, 온톨로지 추론을 통해 주변 상황에 따른 로봇의 행동계획과 로봇의 제어를 수행한다. 그리고 차등구동형로봇을 제작하고, 실제 환경에서의 로봇 주행 실험을 통해 제안한 방법의 효용성을 보인다.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2001년도 춘계학술대회논문집B
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• pp.325-329
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• 2001

This paper addresses a control architecture for the hospital service robot, SmartHelper. With a sensing-reasoning-acting paradigm, the deliberation takes place at planning layer while the reaction is dealt through the parallel execution of operations. Hence, the system presents both a hierarchical and an heterarchical decomposition, being able to show a predictable response while keeping rapid reactivity to the dynamic environment. The deliberative controller accomplishes four functions which are path generation, selection of navigation way, command and monitoring. The reactive controller uses fuzzy and potential field method for robot navigation. Through simulation under a virtual environment IGRIP, the effectiveness of the control architecture is verified.

• 제어로봇시스템학회논문지
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• 제3권3호
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• pp.227-237
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• 1997

Autonomous Underwater Vehicles(AUVs) have become an important tool for various purposes in subsea: inspection, recovery, construction, etc., and the development of autonomous control system is luglay desirable- thete zffe many problems associated with designing the control system for AUV due to unknown underwater envimn-Tnent, the possibility of subsystem failures, and unpredictable changes in the dynamics of the vehicle. In this paper, an autonomous control system based on the intelligent control theory to enhance operation efficiency of the ALTV is presented. The control system has a hierarchical structure which consists of mission planning level, mission control level, navigation level, and execution level. The performance of the control system is investigated by computer simulation. The results show that the proposed control system can be applied successfully to the AUV in spite of the possibility of failures in the vehicle and the collision hazard in the sea environment.

• 한국안전학회지
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• 제11권3호
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• pp.143-153
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• 1996

Shutdown of boiler plants is a dynamic, complicated, and hazardous operation. Operational error is a major contributor to danserous situations during boiler plant shutdowns. It is important to develop an automatic system which synthesizes operating procedures to safely go from normal operation to complete shutdown. Knowledge representation for automatic shutdown of boiler plants makes use of the hierarchical, rule-based framework for heuristic knowledge, the semantic network, frame for process topology, and AI techniques such as rule matching, forward chaining, backward chaining, and searching. This knowledge representation and modeling account for the operational states, primitive operation devices, effects of their application, and planning methodology. Also, this is designed to automatically formulate subgoals, search for positive operation devices, formulate constraints, and synthesize shutdown procedures in boiler plants.

• 한국정밀공학회지
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• 제12권11호
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• pp.148-158
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• 1995

This paper describes a hierarchical structure for feature definition and classification, and feature representation method based on frame structure for process planning of prismatic machined components of injection mold. The concept of Volume Removal Directions and Vertical Faces is proposed to develop a method to define and to classify features for components of injection mold systematically. A method for classifying features by the combination of volume removal directions and vertical faces is developed, and also a feature representation method by using frame structure to represent design and manufacturing information is presented.

• Asian Journal of Innovation and Policy
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• 제12권2호
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• pp.216-228
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• 2023

Expectations and demands for the paradigm of healthcare systems are changing in response to changes in the characteristics of population properties and industrial structures; therefore, it is time to prepare for the career diversification of nursing students who have mainly entered the clinical field. The study tested the pathway of financial literacy on the relationship between entrepreneurship and nursing start-up attitude among nursing students. We obtained data from 177 South Korean nursing students through email and mobile phone. The analysis of the mediating effect was performed by hierarchical multiple regression. The SPSS WIN program was adopted. Entrepreneurship and financial literacy of subjects had a significantly positive effect on nursing start-up attitudes. Financial literacy indirectly affected the relationship between nursing students' entrepreneurship and nursing start-up attitude, and significance was verified by Process Macro. Financial literacy can mediate between entrepreneurship and nursing start-up attitudes. These factors will provide an important basis for nursing students to grow into talented people with business capabilities. Nursing education should strengthen the foundation that promotes business competence in nursing students.

• 한국지리정보학회지
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• 제4권3호
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• pp.21-30
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• 2001

유역 및 하천지형을 해석하기 위해 이전에는 지형도와 경험에 의존한 연구가 주로 이용되었으나 최근에는 파생되는 많은 자료를 효과적으로 분석하기 위해 GIS와 원격탐사 자료를 사용하는 컴퓨터 시스템이 도입되고 있다. 이 연구는 동강유역을 대상으로 GIS와 원격탐사 기법을 사용하여 유역과 하천지형을 분석하였으며, 또한 연륜 연대학적 방법으로 하상퇴적지의 생성연대를 추정하였다. 따라서 이 연구를 통하여 제작된 하상미지형도, 유역구분도, 하천차수도는 동강보존에 유효한 자료로 사용될 수 있을 것으로 사료된다.