• 산경연구논집
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• 제10권1호
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• pp.29-37
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• 2019

Purpose - We study the dynamic linkages of the economic policy uncertainty (EPU) in the US on the manufacturing stock market returns in Korea. In detail, we examine the casual link between EPU index in the US and the manufacturing stock indexes in Korea. Research design, data, and methodology - We measure mainly the distribution effect of the US EPU on the manufacturing stock market in Korea of 1990-2017 by the vector error correction model (VECM). Result - In result, we estimate the impact of the US EPU index has significantly a negative response to the manufacturing stock market in Korea such as non-metal stock index, chemical stock index, food stock index, textile·clothes stock index, automobile·shipbuilding stock index, machinery stock index, steel·metal stock index. Also the remaining variables such as electric·electronics stock index, S&P 500, and producer price index in Korea have a negative relationship with US EPU index. Conclusions - We find out that the relationship between EPU index of the US and the manufacturing stock market in Korea has the negative relationships. We determine the EPU of the US has the spillover effect on the industry stock markets in Korea.

• 한국경영과학회지
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• 제33권4호
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• pp.101-118
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• 2008

This study compares supply chain integration practices of high performing manufacturing plants in Korea and those in the U.S., Japan, and six European countries. Data were drawn from the High Performance Manufacturing(HPM) Round 3, a joint data-collection effort on manufacturing and supply chain management. Specifically, in the automotive, electronics, and machinery industries, we selected twenty Korean plants with high performance reputation and chose the same number of non-Korean plants(HPM top 20), based upon their competitive manufacturing capability index and customer satisfaction index. The Korean plants do not significantly differ from HPM top 20 plants in that internal value creation activities are coordinated and integrated at the corporate level and between plants. The Korean plants, however, demonstrated more integration with suppliers than with customers, and only the two of them were classified as 'outward facing', which pursues greater integration with both customers and suppliers. Unbalanced and lower integration with customers of the Korean plants was attributed to the lower than expected manufacturing capability and customer satisfaction. Implications for supply chain professionals were discussed.

• 지역연구
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• 제33권3호
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• pp.61-78
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• 2017

2004년 국가균형발전 특별법에 의거해 수도권 기업의 지방 이전 보조금 지원 제도가 도입되었으며, 이에 따라 소요되는 중앙 및 지방정부의 재정 지출 규모가 크다. 본 연구는 수도권 기업의 지방 이전 보조금 제도의 도입, 확장 및 감축과 관련해 수도권 제조업체가 비수도권으로 이전할 확률의 변화를 분석함으로써 해당 제도의 실효성을 논의하고자 하였다. 1996년부터 2014년도까지의 광업 제조업조사자료를 활용, 중첩 로짓 분석 방식으로 제조업의 입지 이전 및 재 입지 선택모형을 추정해 보조금 제도와 관련해 구분한 시기 별 제조업체가 수도권에서 비수도권으로 이동할 확률의 변화를 분석하였다. 본 연구 자료에서 식별된 이전 업체의 소재지 변화를 살펴보면 보조금 제도의 도입 이후, 도입 이전에 비해 수도권에서 비수도권으로 이동하는 제조업체의 비중이 통계적으로 유의하게 증가하였다. 그러나 제조업체의 입지 이전 및 재 입지 선택모형을 추정해 기타 제반 요인의 영향을 통제한 결과, 보조금 제도가 도입된 2004년 이후 수도권에서 비수도권으로의 이전 확률이 전반적으로 감소한 것으로 나타났다. 제도의 확장 및 감축에 따른 시기 별로 살펴보면 제도 도입 초기에는 수도권에서 비수도권으로의 이전 확률이 통계적으로 유의하게 증가하였으나, 제도 확장기에는 그 확률이 제도 도입 이전보다 감소했으며 지원대상의 조정 및 지원 범위 감소를 겪은 2011년 이후, 비수도권으로의 이전 확률이 한층 더 낮아진 것으로 나타났다. 이는 기업의 비수도권 이전 보조금 제도의 도입 이후 관측된 비수도권으로의 이동 경향 증가가 상당 부분 토지이용비용, 집적의 경제 및 시장 접근성 등의 요인에 의해 설명되며, 보조금 지원 자체에 기인한 효과라고 보기 어려움을 의미한다. 아울러 경제활동의 비수도권 입지를 유도하기 위해서는 단순히 재정적 지원을 확대하는것 보다 비수도권 지역의 물리적, 환경적 제약을 완화하고, 토지 등의 생산요소 비용 절감, 수도권과의 연계 강화 등을 통해 제조업체의 경영 환경을 개선하려는 노력이 중요함을 시사한다.

• 한국CDE학회논문집
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• 제5권4호
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• pp.293-300
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• 2000

The non-manifold geometric modeling technique is to improve design process and to Integrate design, analysis, and manufacturing by handling mixture of wireframe model, surface model, and solid model in a single data structure. For the non-manifold geometric modeling, Euler operators and other high level modeling methods are necessary. Boolean operation is one of the representative modeling method for the non-manifold geometric modeling. This thesis studies Boolean operations of non-manifold model with the data structure of selective storage. The data structure of selective storage is improved non-manifold data structure in that existing non-manifold data structures using ordered topological representation method always store non-manifold information even if edges and vortices are in the manifold situation. To implement Boolean operations for non-manifold model, intersection algorithm for topological cells of three different dimensions, merging and selection algorithm for three dimensional model, and Open Inventor(tm), a 3D toolkit from SGI, are used.

• 자원ㆍ환경경제연구
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• 제23권1호
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• pp.91-132
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• 2014

본 논문은 한국, 미국, 영국의 제조업 및 전기 가스 수도사업에서 ICT 확산이 노동 및 에너지 수요에 어떠한 영향을 미치는지 연구하였다. 제조업에 대해서는 ICT 자본, 비ICT 자본, 노동, 전기, 연료, 재료를 생산요소로 가정하고, 전기 가스 수도사업에 대해서는 ICT 자본, 비 ICT 자본, 노동, 에너지 재료를 생산요소로 가정하여 요소 간 대체관계를 분석하였다. 모리시마 대체탄력성 추정결과 및 요소의 상대적 가격변화를 고려할 때, 3개 국가의 제조업 및 전기 가스 수도사업에서 ICT 자본은 노동을 대체하여 노동 수요를 감소시키는 것으로 나타났다. ICT 자본에 비해 전기 및 연료의 가격증가율이 높은 미국과 영국의 제조업에서 ICT 자본은 전기 및 연료를 대체하여 에너지 수요를 감소시키는 것으로 나타났다. 한국의 제조업에서 ICT 자본과 전기 및 연료가 대체관계에 있으나, 요소의 상대적 가격변화를 고려하면 ICT 자본이 에너지 수요 감소에 기여했다고 보기 어렵다. 3개 국가의 전기 가스 수도사업에서 ICT 자본은 에너지 재료를 거의 탄력적으로 대체하여 에너지 재료 수요를 감소시키는 것으로 분석되었다.

• 한국공작기계학회:학술대회논문집
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• 한국공작기계학회 2003년도 추계학술대회
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• pp.174-179
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• 2003

Non-destructive test on the size and depth of cracks has been required for the safety evaluation of structures. Ultrasonic method based on laser techniques is one of the most popular non-destructive methods which overwhelm PZT based tests. In the present paper, ultrasonic was generated by high powered Q switching Nd:YAG pulse laser. Experiments were carried out using Fabry-Perot interferometer which was intensively discussed in the present study.

• 품질경영학회지
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• 제31권3호
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• pp.114-125
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• 2003

In this paper, we deal with the problem of modeling of agent-based robot manufacturing cell. Its role is becoming increasingly important in automated manufacturing systems. For Object Oriented & Queueing Petri Nets (OO&QPNs), an extended formalism for the combined quantitative and qualitative analysis of different systems is used for structure and performance analysis of mobile robotic cell. In the case study, the OO&QPN model of a mobile robotic cell is represented and analyzed, considering multi-class parts, non-preemptive priority and alternative routing. Finally, the comparison of performance values between Shortest Process Time (SPT) rule and First Come First Serve (FCFS) rule is suggested. In general, SPT rule is most suitable for parts that have shorter processing time than others.

• International Journal of Precision Engineering and Manufacturing
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• 제7권3호
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• pp.39-46
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• 2006

This paper presents an elastic deformation model of a spindle unit (S/U), which takes into account the non-linear properties of high-speed ball bearings (particularly the effect of high rotational speed). For this, a software for the estimation of the S/U elastic deformation properties was developed and intended for use by S/U designers. A computer aided analysis of the model using the developed software was carried out and experiments showed the significant effect of rotational speed, cutting load and bearing axial preload, and showed some new phenomena, from which the criteria for the choice of bearing axial preload is given.

• 한국정밀공학회지
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• 제13권6호
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• pp.152-160
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• 1996

This paper focuses on development and evaluation of a performance management algorithm for IEEE 802.4 token bus networks to serve large-scale integrated manufacturing systems. Such factory automation networks have to satisfy delay constraints imposed on time-critical messages while maintaining as much network capacity as possible for non-time-critical messages. This paper presents a network performance manager that adjusts queue capacity as well as timers by using a set of fuzzy rules and fuzzy inference mechanism. The efficacy of the performance management has been demonstrated by a series of simulation experiments.

• 산업경영시스템학회지
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• 제36권1호
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• pp.24-35
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• 2013

A cell formation approach based on cluster analysis is developed for the configuration of manufacturing cells. Cell formation, which is to group machines and parts into machine cells and the associated part families, is implemented to add the flexibility and efficiency to manufacturing systems. In order to develop an efficient clustering procedure, this paper proposes a cluster analysis-based approach developed by incorporating and modifying two cluster analysis methods, a hierarchical clustering and a non-hierarchical clustering method. The objective of the proposed approach is to minimize intercellular movements and maximize the machine utilization within clusters. The proposed approach is tested on the cell formation problems and is compared with other well-known methodologies available in the literature. The result shows that the proposed approach is efficient enough to yield a good quality solution no matter what the difficulty of data sets is, ill or well-structured.