• Journal of Environmental Policy
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• v.7 no.1
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• pp.101-118
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• 2008

In this study, we estimate the labor demand function of environmental industry with environmental industry survey of Ministry of Environment. To do this, we apply the panel estimation technique. We follow the widely accepted estimation methods: panel generalized least square, panel generalized least square with heteroskedasticity/auto-correlation, random effect model and random effect model with auto-correlation. On the average, each industry is estimated at the elasticity of sales on labor demand from 0.193 to 0.259. It means that the increase of sales by 214billion won can create around $1,600{\sim}2,300$ jobs, and this is merely a direct effect. So when we consider the whole effect of labor demand increase including indirect derived job creation, the labor demand increase will be higher than this. So it is desirable for the government to support the development of environmental industry for sustainable development.

• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.42 no.9
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• pp.739-744
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• 2014

Space exploration project usually consists of so many fields of sub projects that it has a diverse ripple effect throughout the economy. Further studies could not consider the complexity of the space exploration project because they regarded it as one project in spite of the diversity. This study found a way to consider complexity of space exploration project using the concept of WAC(weighted average coefficient). The moon exploration project (2014~2020) is the subject of this study. We classified the moon exploration project into 8 industries and calculated the WAC of production inducement coefficient, value added inducement coefficient, and employment inducement coefficient. The result of analysis using these WACs is that production inducement effect amounts to 1,229.6 billion won, value added inducement effect 324.6 billion won, employment inducement effect 4,844 men. And the linkage effect analysis shows that moon exploration project has more backward linkage effect than forward linkage effect.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.559-561
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• 2005

CAN(Controller Area Network)은 시스템이 간단하고 저렴하게 구현 할 수 있는 필드버스(Field bus)로써 1980년대 독일의 BOSCH사에 의해 자동차 제어용 네트워크로 개발되었고, 실시간 계측제어 능력이 우수하여 산업전반(산업 자동화, 건을 자동화, 의료 장비, 열차, 중장비 차량)에 사용되고 있다. 본 논문에서는 CAN의 단일 마스터 시스템(Single Master System)에서 마스터 노드에 문제가 발생할 때, 전체 시스템이 다운되는 현상을 악기 위해 마스터 노드를 동적으로 변화시키는 동적 마스터 시스템(Dynamic Master System)을 제안하고 기존의 시스템과 비교하여 시스템의 가용성을 알아보았다.

• Journal of Korean Institute of Industrial Engineers
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• v.32 no.1
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• pp.9-17
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• 2006

This paper deals with a discrete simulation optimization method for designing a complex probabilistic discrete event simulation. The developed algorithm uses the configuration algorithm that can change decision variables and the stopping algorithm that can end simulation in order to satisfy the given objective value during single run. It tries to estimate an auto-regressive model for evaluating correctly the objective function obtained by a small amount of output data. We apply the proposed algorithm to M/M/s model, (s, S) inventory model, and known-function problem. The proposed algorithm can't always guarantee the optimal solution but the method gives an approximate feasible solution in a relatively short time period. We, therefore, show the proposed algorithm can be used as an initial feasible solution of existing optimization methods that need multiple simulation run to search an optimal solution.

• Journal of Industrial Technology
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• v.22 no.A
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• pp.89-94
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• 2002

In this paper, a Exhaust Flow Controller (EFC) technology for uniform application of film coater and developer device is introduced that spread and remove photo resister at semiconductor manufacturing process. Because developed EFC device uses differential pressure sensing method as a differential flow meter and embodied smart A/D conversion by using a one chip microprocessor and devised by feedback Servo control, It has shown excellent performance and stability evaluation, as maximum 2000L/min flow, capability of installation to actual semiconductor equipment.

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.5
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• pp.147-153
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• 2002

In this paper, a substrate network model to be used with BSIM3 MOSFET model for submicron MOSFETs in giga hertz frequencies and its direct parameter extraction with physically meaningful values are proposed. The proposed substrate network model includes a conventional resistance and single inductance originated from ring-type substrate contacts around active devices. Model parameters are extracted from S-parameter data measured from common-bulk configured MOS transistors with floating gate and use where needed without any optimization process. The proposed modeling technique has been applied to various-sized MOS transistors. The substrate model has been validated for frequency up to 300Hz.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2000.05a
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• pp.43-50
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• 2000

인터넷 환경에서의 경매 시스템은 거래 당사자들간에 더욱더 효과적인 교환수단으로 사용되고 있다. 그러나 이러한 효과는 거래의 증가로 인한 문서나 관리상 대량의 데이터처리를 가져 올 것이다. 그러므로 앞으로 경매에서는 거래 당사자들간의 탐색, 선택, 비교 처리가 필요하여 진다. 이러한 연구결과 거래당사자간의 업무흐름을 더욱 효율적으로 처리할 단일 에이전트를 통합한 인터넷상에서 수행되어 지는 멀티에이전트로 구성되어진 경매 시스템을 제시한다. 본 논문에서는 인터넷에서 수행되어지는 경매시스템에 에이전트 기술을 적용하여 멀티 에이전트 기반 경매 시스템을 설계한다. 에이전트 경매시스템은 거래자간의 업무 및 거래환경 등을 자동적으로 수행하며 향후 다양한 인터넷 분야로의 응용을 가능하게 할 것이다.

• The monthly packaging world
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• s.218
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• pp.53-63
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• 2011

"화학물질의 등록 및 평가 등에 관한 법률"도입이 산업과 경제에 미치는 영향은 화학물질에 대한 시험비용의 크기, 시험 대상 화학물질 종류, 대체물질 사용 비용부담 증가 등 간접비용의 크기 등에 따라 현저히 차이가 났다. 국내 시험 기관에서 제시한 시험비용 데이터를 이용하여 추정된 화평법 도입의 제조업 비용증대 크기는 환경부 데이터를 기준으로 할 경우에 비해 6~8배 큰 것으로 분석되었다. GDP 감소 영향(2015년 기준)도 환경부 데이터를 기준으로 할 경우 0.001~0.015%의 미미한 수준에 그칠 것이나 REACH 시험비용을 기준으로 할 경우에는 0.01~0.09%로 크게 상승하는 것으로 추정되었다. 본 연구에서는 또한 화평법 도입의 적용대상이 환경부의 계획대로 단일물질에 국한됨으로써 완제품의 경우 비용부담이 전혀 발생하지 않는 것으로 가정하였으나, 실제로는 완제품의 경우에도 화평법 도입의 영향을 받을 가능성이 있는 것으로 우려되고 있다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1999.12a
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• pp.493-505
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• 1999

Zoom lens camera calibration is an important and difficult problem for two reason at least. First, the intrinsic parameters of such a camera change over time, it is difficult to calibration them on-line. Secondly, the pin-hole model for single lens system can not be applied directly to a zoom lens system. In this paper, We address some aspects of this problem.

• Journal of Korean Institute of Industrial Engineers
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• v.16 no.2
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• pp.109-117
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• 1990

In this paper we study a mathematical programming model for the single-card KANBAN system in a multi-stage capacitated general-type-structure production. Until now this production type setting has not been studied. The modeling of this problem results in a complex integer programming which can be modified to the more simple integer programming model. We present a heuristic method and some numerical examples. Though the presented method doesn't always find an optimal solution, this method guarantees to find a feasible solution. We expect this work to be practised in the real fields.