• 대한전기학회논문지
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• 제39권8호
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• pp.805-812
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• 1990

In this paper, a design on the superconducting monolith for superconducting pulse magnet is described. Both stability and AC loss parameters are used in the design process, which restricted various design parameters. Determined design parameters satisfy both stability and AC loss restrictions. Finally superconducting monolith is flattened, fitting for magnet and acquiring transposition effect.

• 산업기술연구
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• 제23권A호
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• pp.83-92
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• 2003

The previous control point surveying, being standardized by trigonometric point which hasn't been unified in the whole country and producing put into operation through complex calculation process, has many problems about accurate results and economic side. Because most of trigonometric points that standardize a present surveying are in situation in top of the mountain, there are many difficulties in solving sight problems. Since trigonometric points are far away from one another, Differences are created because of limitation of point distance, observatory network construction and distribution of error. In the information age, the study about acquiring three dimension surveying information that uses GPS has been processed as fast as acquiring topography information is getting important gradually. For utilizing GPS in surveying work, deciding transformation 7-Parameters that changes data about location information which is received by GPS receiver is important. In this study, it is decided transformation 7-Parameters that can be used in ka-pyoung area by using GPS surveying production that had put into operation.

• 시스템엔지니어링학술지
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• 제18권2호
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• pp.1-10
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• 2022

In general, similar or previous projects are mainly referred to in order to derive operational test and evaluation(OT&E) items after acquiring weapon system. The idea that a more systematic method is needed is spreading because some of OT&E items derived in this process are redundant or unnecessary. Therefore, in this topic, we plan to use WBS, a tool that classifies components into a hierarchical structure and manages development easily to achieve the weapon system development goal. In addition, the WBS tool is applied to the medium-sized standard vehicle project, which is currently being research and developed, to effectively derive OT&E items. As a result of deriving OT&E items by applying WBS to the vehicle development field and electric devices of the medium-sized standard vehicle project, the operability and relationship were judged early, and then contents of the evaluation items could be written substantially while working on environmental adaptability. In the future, it is judged that the efficiency will be increased if the method discussed in this paper is applied when deriving the OT&E items from the R&D development project.

• 전기학회논문지P
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• 제52권1호
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• pp.35-41
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• 2003

In this paper, a machine vision system for recognizing and classifying the patterns and marks engraved by die molding or laser marking on the glass panels of computer monitors is suggested and evaluated experimentally. The vision system is equipped with a neural network and an NGC pattern classifier including searching process based on normalized grayscale correlation and adaptive binarization. This system is found to be applicable even to the cases in which the segmentation of the pattern area from the background using ordinary blob coloring technique is quite difficult. The inspection process is accomplished by the use of the NGC hypothesis and ANN verification. The proposed pattern recognition system is composed of three parts: NGC matching process and the preprocessing unit for acquiring the best quality of binary image data, a neural network-based recognition algorithm, and the learning algorithm for the neural network. Another contribution of this paper is the method of generating the training patterns from only a few typical product samples in place of real images of all types of good products.

• 시스템엔지니어링학술지
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• 제5권2호
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• pp.11-16
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• 2009

This study introduces the verification, validation & accreditation (VV&A) process for modeling & simulation (M&S). VV&A is standard process for credibility of M&S. In several countries including USA, for weapon system of Defense Development using M&S, VV&A is necessary procedures to acquire official approving for credibility of M&S. Many countries have regular recommend practice guide (RPG) and instructive for VV&A of M&S. In this study, we focus the VV&A key concepts as Department of Defense RPG of USA and give the outline of the main VV&A concepts because we don't have any available VV&A Instructive. Also, this report documents the first significant VV&A application for a MITS(M-SAM Integrate Test System) including Verification and Validation(V&V) activity and tasks.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2007년도 춘계학술대회
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• pp.73-80
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• 2007

Recently, the strategy of the age of limitless competition for existence of manufacturing company appears for the enhancement of productivity through the automatic system, the reduction for the cost for standardization and the decision making process for the information system. Especially the critical success factors in manufacturing company can be summarized for the establishment of production visibility through the production management, material & work-in-process management, the establish of the flexible manufacturing system for the changed order priority and the establish of the quality system for improvement of product and process quality. The existing production management systems supply only simple information about production results on real time, can delay quick decision making. And it can prevent acquiring the information about various customer needs and the communication problems with other systems. In this paper, it will show MES system, a solution for the problems of existing production management systems. And through a case study of D company, it will reveal improvement effect on shipment error using MES system and economic analysis for MES itself.

• Spatial Information Research
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• 제9권1호
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• pp.137-154
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• 2001

본 연구는 GIS 정책을 과정 모델을 통해 평가하고 문제점 및 개선방안을 제시하는데 목적이 있다. 즉 우리나라 지방정부의 GIS 집행과정이 어떤 과정을 밟아가고 있으며, 전과정에서 중요하게 고려하였던 요인 및 단계가 무엇이며, 그리고 이로 인해 나타난 GIS 정책의 문제점은 무엇인지를 분석하고자 하였다. 분석결과 우리나라 지방정부의 GIS집행과정에서 나타난 대표적인 문제점은 GIS의 도입단계에서 고려해야할 중요한 단계가 구축단계에 포함되지 않았거나 고려하였다. 하더라도 비중이 낮은 것으로 나타났다. 또한 시스템의 구입 및 업체선전 등 기술적인 요인보다는 사용가능성 검토, 관리자 교육 등 비기술적 요인에 대한 단계들에 대한 관심이 부족하였으며, 이로 인해 기본 계획과 관련된 전략이 제대로 수립되지 못한 것으로 나타났다. 이것은 지방정부에서 단순히 새로운 정보시스템을 도입하는 것만이 반드시 성공적인 채택을 의미하는 것이 아니라는 사실을 반증하는 결과이다.

• 한국도서관정보학회지
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• 제20권
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• pp.61-105
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• 1993

For decades, general services and accounting officers have been dominant forces in collection development activities in college and university libraries in Korea. The role of certified librarians has been rather peripheral. This has been allowed by the fact that library acquisitions departments had to be headed by non-librarian general administrative officers by the government regulation. The philosophy behind this regulation was that acquiring library materials was not any different from simple purchasing act of other useful goods in the marketplace. In affiliation with the element of general administrative officers, domestic book-sellers also had a great influence in collection building activities in college and university libraries in Korea. This has been made possible by the fact that no other people could su n.0, pply library materials, especially foreign library materials. It has been pointed out for years that the mechanism in which general administrative officers and domestic book-sellers had a greater say in library acquisitions activities was especially inefficient in acquiring wanted materials in wanted speed and in wanted price. In this mechanism, books and periodicals were mere goods. They were not perceived as intellectual property holding information and knowledge in them. Since the student movement to revolutionize the library system of the Pusan National University, September 1987 to December 1988, the creative and progressive elements in this university library have been making great efforts to change the acquisitions system in this library into a more efficient one by putting certified librarians at the center of the whole acquisitions process. These efforts have been successful to a certain degree. In this discursive study of the case of the Pusan National University Library, I have tried to achieve a social description of the library process in which progressively motivated librarians succeeded in alienating administrative officers and book-sellers and in grasping in their hands the hegemony in the collection building aspect of library activities. It has been discovered that this was possible only when the librarians were mature enough to have their kind of professionalism, i.e., professional ethics and craftsmanship.

• 반도체디스플레이기술학회지
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• 제5권3호
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• pp.29-32
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• 2006

Because of new requirements related to the employment of SMT(Surface Mounting Technology) manufacturing and the diversity of components on high density PCB(Printed Circuit Boards), Thermal control of the reflow process is required in order to achieve acceptable yields and reliability of SMT assemblies. Accurate control of the temperature distribution during the reflow process is one of the major requirements, especially in lead-free assembly. This study has been performed for reflow process using the commercial CFD(Computational Fluid Dynamics) tool for predicting flow and temperature distributions. Porous plate was installed to prevent leakage flow which was one of the major problem of temperature uniformity in the reflow process. There is a separation region where the flow is turned. Outside wall made of porous plate is to prevent and minimize separation region for acquiring uniform temperature during operation. This paper provided design concept from CFD results of the steady state temperature distribution and flow field inside a reflow oven.

• 대한산업공학회지
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• 제40권1호
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• pp.43-51
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• 2014

Statistical process control (SPC) is an important technique for monitoring and managing the manufacturing process. In spite of its easiness and effectiveness, some problematic sides of application exist such that the SPC techniques are hardly reflect the changes of the process conditions. Especially, update of control limits at the right time plays an important role in acquiring a reasonable performance of control charts. Therefore, we propose the control chart performance evaluation index (CPEI) based on count data model to monitor and manage the performance of control charts. The CPEI could indicate the degree of control chart performance and be helpful to detect the proper update cycle of control limits in real time. Experiments using real manufacturing data show that the proper update intervals are made by proposed method.