• 한국유기농업학회지
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• 제25권1호
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• pp.1-22
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• 2017

The purpose of this research is to analysis actual condition of promoting complex industrialization and changes after promoting, and then to classify organic farmer using cluster analysis based on delineated organic farmer's changes factors. This study also aims to investigate differences in socioeconomic characteristics and behavioral intentions among classified groups of organic farmer's changes. Data were obtained by questionnaire. From the factor analysis, four factors were derived as "Economics", "Public benefit", "Environment and philosophical values" and "Establishing management and the regional bedrock". From the cluster analysis, three cluster were derived as "group that has a positive awareness of promoting complex industry", "group that has a negative awareness of promoting complex industry" and "unstable management and a regional base". And the three classifications were significantly different in the satisfaction and behavioral intentions.

• 한국항해항만학회지
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• 제34권10호
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• pp.823-831
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• 2010

부산의 해운비즈니스 산업은 항만물류 중심으로 영세하며, 지역적으로 분산되어 산업시너지를 창출해 내고 있지 못한 실정이다. 부산의 해운비즈니스 산업을 집적화하고 고부가가치 해운서비스 산업을 부산에 유치하기 위한 해운비즈니스 클러스터 집적화 단지의 조성 필요성에 따라 본 연구는 집적화 단지의 조성방안을 제시하고자 하였다. 부산 및 수도권의 해운비지니스업체를 대상으로 집적화 단지의 수요를 조사하여 부산신항 중심의 명지지역에 부산 지역의 산업체와 행정기관 및 교육연구기관의 이전 집적화와 국내외 산업체 및 관련기관을 유치하는 집적화 조성 전략을 제시하고 집적화 단지의 경제적 기대효과를 산정하였다.

• Korean Journal of Mathematics
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• 제14권1호
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• pp.65-70
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• 2006

In this article, we mention some subsequent developments of the theory of cluster sets, and present a new boundary cluster set for a simply connected domain in the complex plane and its applications.

• Journal of Information Technology Applications and Management
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• 제19권2호
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• pp.117-134
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• 2012

Cluster industries are geographically concentrated and inter-connected by the flow of goods and services, which is stronger than the flow linking them to the rest of the economy. Photonics industries are one of the fastest growing high-tech industries in the world today. Especially, the city of Gwangju(South Korea) industrial cluster, a specialized complex in photonics industry, produced remarkable results in developing high-quality technologies since it launched the cluster program in 2005. Gwangju photonics industrial cluster will be ranked top level of the world photonics industry. In this sense, this study is aimed at proposing a new research model in which corporate performance influence factors of photonics industrial cluster (i.e., business environment, cooperative relationship, and industry-university-research institute partnership) affect absorptive capacity positively, leading to corporate performance eventually. This study developed a research model to explain the Korean photonics industrial cluster effects, and collected 91 survey responses from photonics based company managers in industrial cluster complex. To prove the validity of the proposed research model, PLS analysis is applied with valid 91 questionnaires. By employing PLS technique, the measurement reliability and validity of research variables are tested and the path analysis is conducted to do the hypothesis testing. In brief, the finding of this study suggests that corporate performance influence factors of photonics industrial cluster affect absorptive capacity positively, and corporate performance as well.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권5호
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• pp.2469-2490
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• 2019

A low-energy adaptive clustering hierarchy (LEACH) protocol is a low-power adaptive cluster routing protocol which was proposed by MIT's Chandrakasan for sensor networks. In the LEACH protocol, the selection mode of cluster-head nodes is a random selection of cycles, which may result in uneven distribution of nodal energy and reduce the lifetime of the entire network. Hence, we propose a new selection method to enhance the lifetime of network, in this selection function, the energy consumed between nodes in the clusters and the power consumed by the transfer between the cluster head and the base station are considered at the same time. Meanwhile, the improved FTBA algorithm integrating the curve strategy is proposed to enhance local and global search capabilities. Then we combine the improved BA with LEACH, and use the intelligent algorithm to select the cluster head. Experiment results show that the improved BA has stronger optimization ability than other optimization algorithms, which the method we proposed (FTBA-TC-LEACH) is superior than the LEACH and LEACH with standard BA (SBA-LEACH). The FTBA-TC-LEACH can obviously reduce network energy consumption and enhance the lifetime of wireless sensor networks (WSNs).

• Journal of Magnetics
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• 제18권2호
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• pp.202-206
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• 2013

In this paper, the MFL (magnetic flux leakage) signals of complex defects on the underground gas pipeline are analyzed and their depths are estimated. Since closely-located defects (complex defects) affect each other, accelerate the progress of defection, and are finally combined to one (cluster), it's meaningful to differentiate complex defects from single defects by analyzing their characteristics. Various types of complex defects are characterized and analyzed by defining the safety distance for interference. 26 artificial defects are carved on the pipeline simulation facility (PSF) to analyze the characteristics of complex defect and demonstrate the accuracy of the proposed complex defect estimation. The proposed method shows average length error of 5.8 mm, average width error of 15.55 mm, and average depth error of 8.59%, respectively.

• 산업클러스터
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• 제3권1호
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• pp.11-25
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• 2009

현재 풍력에너지는 세계적으로 가장 급격하게 관심이 집중되고 있는 에너지원으로 평가되고 있다. 이러한 환경의 변화와 신재생에너지에의 집중된 관심은 보다 추진력을 얻으며 풍력발전관련 산업체들에 힘을 실어주고 있다. 부산의 녹산 풍력클러스터는 풍력발전기의 요소부품을 생산하는데 있어 주요한 기업체들이 몰려있으며, 과거 몇 년간 세계적인 관심에 편승하여 산업입지가 높아지고 있지만, 이에 반해 관심은 여전히 제한적이었다. 본 논문은 서구에서 이루어지고 있는 풍력발전산업에서 최근까지 이루어졌던 주관심 이슈에 대해 조사하고자 한다. 또한 녹산 풍력클러스터의 현황과 보다 효과적인 집적지를 구성하기 위한 향후 계획에 대한 제안을 하고자 한다.

• 한국경영과학회:학술대회논문집
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• 대한산업공학회/한국경영과학회 2002년도 춘계공동학술대회
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• pp.285-292
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• 2002

A cluster tool for semiconductor manufacturing is an integrated device that consists of several single wafer processing modules and a wafer transport module based on a robot. The distributed module controllers are integrated by an inter-module communication network and coordinated by a centralized controller, called a cluster tool controller (CTC). Since the CTC monitors and coordinates the distributed complex module controllers for advanced process control, complex commuication messaging and services between the CTC and the module controllers are required. A SEMI standard, CTMC(Cluster Tool Module Communication), specifies application-level communication service requirements for inter-module communication. We propose the use of high-level fieldbuses, for instance. PROFIBUS-FMS, for implementing CTMC since the high-level fieldbuses are well suited for complex real-time distributed manufacturing control applications. We present a way of implementing CTMC using PROFIBUS-FMS as the communication enabler. We first propose improvements of a key object of CTMC for material transfer and the part transfer protocol to meet the functional requirements of modem advanced cluster tools. We also discuss mapping objects and services of CTMC to PROFIBUS-FMS communication objects and services. Finally, we explain how to implement the mappings.

• 반도체디스플레이기술학회지
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• 제15권2호
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• pp.20-25
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• 2016

The parallel computer cluster system has been known as the powerful tool to solve a complex physical phenomenon numerically. The numerical analysis of large size of Li-ion battery pack, which has a complex physical phenomenon, requires a large amount of computing time. In this study, the numerical analyses were conducted for comparing the computing efficiency between the single workstation and the parallel cluster system both with multicore CPUs'. The result shows that the parallel cluster system took the time 80 times faster than the single work station for the same battery pack model. The performance of cluster system was increased linearly with more CPU cores being increased.

• 산업경영시스템학회지
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• 제29권3호
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• pp.128-134
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• 2006

The most of national industrial complex were developed and supplied not according to the requirements of enterprise but the needs of the government. And it leads to current serious out of balance in demand and supply of industrial complex. Buckpyoung industrial complex started sale from when the industrial complex developed in 1995 however the unsold percentage of it was 67% until in October,2005. And this result was ranked the top in the unsold percentage among the 42 national industrial complex in korea. In this paper we research how to accelerate the sale of Buckpyoung industrial complex and to reinvigorate local economy and present the constitution of building material cluster and physical distribution system as the results of our research.