• Journal of the Korean institute of surface engineering
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• v.56 no.5
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• pp.335-340
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• 2023

Quinary component of 3㎛ thick Ti-Al-Si-Cu-N films were deposited onto WC-Co and Si wafer substrates by using an arc ion plating(AIP) system. In this study, the influence of copper(Cu) contents on the mechanical properties and microstructure of the films were investigated. The hardness of the films with 3.1 at.% Cu addition exhibited the hardness value of above 42 GPa due to the microstructural change as well as the solid-solution hardening. The instrumental analyses revealed that the deposited film with Cu content of 3.1 at.% was a nano-composites with nano-sized crystallites (5-7 nm in dia.) and a thin layer of amorphous Si₃N₄ phase.

• Proceedings of the KAIS Fall Conference
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• 2012.05b
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• pp.781-784
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• 2012

본 논문은 하이브리드 자동차 및 전기자동차의 고주파 발생시 전자파를 차단하는 역할을 하는 인버터 실드쉘의 프로그레시브 금형의 스트립 레이아웃과 금형설계 및 제작에 관한 연구이다. 총 11공정으로 블랭크 레이아웃을 구성하였고, 3D 금형설계를 하였다. 이와 같이 제작한 금형을 2차에 의한 트라이아웃을 하여 일본에서 수입하던 단발 금형을 프로그레시브 금형으로 인버터 실드쉘을 양산하여 원가절감, 생산성 향상에 기여하였다.

• Proceedings of the KAIS Fall Conference
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• 2011.12b
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• pp.607-610
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• 2011

본 논문은 하이브리드 자동차 및 전기자동차의 고주파 발생시 전자파를 차단하는 역할을 하는 인버터 실드쉘의 단공정 스트립 레이아웃과 금형제작에 관한 연구이다. 현재는 일본에서 금형을 수입하여 7벌 단공정 금형방식으로 개발하여 65톤 프레스에서 시험생산하고 있는 중이다. 이에 본 논문에서는 단공정 금형의 스트립 레이아웃을 분석하여 프로그레시브금형설계 및 제작시 원가경쟁력을 갖추기 위하여 연구하였다.

• Membrane Journal
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• v.25 no.3
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• pp.203-215
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• 2015

Chlor-alkali (CA) membrane process is based on salined water electrolysis employing cation condutive polymer electrolytes, which has been used for the conventional production of both sodium hydroxide and chlorine gas. The CA membrane process has advantages such as relatively low environmental impacts and fairly reduced energy consumption, when compared with diaphragm and mercury process. In this review articles, basic concepts, fundamental characteristics, key technologies of CA membrane process are dealt with in detail. In addition, advanced technologies associated with CA membrane process are described. They include zerogap and oxygen depolarized cathode technologies to improve energy efficiency during the electrolysis. Carbon dioxide mineralization technology will also be introduced as an example of hybridization with different technologies. Finally, current market trend in CA membrane process will be presented.

• Journal of the Korean institute of surface engineering
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• v.54 no.6
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• pp.302-306
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• 2021

SnO₂ 30/Ag 15/SnO₂ 30 nm(SAS) tri-layer films were deposited on the glass substrates with RF and DC magnetron sputtering and then electron beam is irradiated on the surface to investigate the effect of electron bombardment on the opto-electrical performance of the films. electron beam irradiated tri-layer films at 1000 eV show a higher figure of merit of 2.72×10^-3 Ω^-1 than the as deposited films due to a high visible light transmittance of 72.1% and a low sheet resistance of 14.0 Ω/☐, respectively. From the observed results, it is concluded that the post-deposition electron irradiated SnO₂ 30/Ag 15/SnO₂ 30 nm tri-layer films can be used as a substitute for conventional transparent conducting oxide films in various opto-electrical applications.

• Design & Manufacturing
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• v.16 no.2
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• pp.1-6
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• 2022

As environmental regulations are strengthened, automobile manufacturers continuously research lightweight structures based on carbon fiber reinforced plastic (CFRP). However, it is difficult to see the effect of strength reinforcement when using a single CFRP material. To improve this, a hybrid laminate in which CFRP is mixed with the existing body structural steel was proposed. In this paper, CFRP patch reinforcement is applied to each compression/tensile action surface of a 22MnB5 metal sheet, and it was evaluated through a 3-point bending experiment. Progressive failure was observed in similar deflection on bending deformation to each one-sided reinforced specimen. After progressive failure, the tensile reinforced specimen was confirmed to separate the damaged CFRP patch and 22MnB5 sheet from the center of the flexure. The compression reinforced specimen didn't separate that CFRP patch and 22MnB5, and the strength reinforcement behavior was confirmed. In the compression reinforced specimen, damaged CFRP patches were observed at the center of flexure during bending deformation. As a result of checking the specimen of the compression reinforcement specimen with an optical microscope, It is confirmed that the damaged CFRP patch and the reinforced CFRP patch overlapped, resulting in a concentrated load. Through the experimental results, the 22MnB5 strength reinforcement characteristics according to the reinforcement position of the CFRP patch were confirmed.

• Journal of the Korea Convergence Society
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• v.12 no.10
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• pp.71-79
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• 2021

In the manufacturing industry, there is a transition to multi-item production for reinforcement of competitiveness. Therefore, the hybrid manufacturing technology is increasing. Especially, many efforts in production quality improvement are made through the adoption of the manufacturing execution system and ERP, so it is necessary to operate MES for prompt and effective management. MES should improve ineffective parts in production activities while managing all stages related to production of products. If there is change in the process, the changed items should be reflected to the system. However, most manufacturing execution systems are operated passively and repetitively by system administrators. This study presents a model that system administrators can comprehensively apply reference information about production related requirements on specific line's equipment to the same equipment of other lines. The flexible response for application to production lines is possible thanks to the division of blanket application and selective application of reference information through proposed model.

• The Magazine for Energy Service Companies
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• s.79
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• pp.30-35
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• 2012

작년 9월 15일, 정전대란이 일어났다. 우리나라도 이제 전력 수요가 많아짐에 따라 블랙아웃에 절대 안심할 수 없는 지경에 이르렀다. 최근 전력수급과 에너지 효율성 등에 대한 관심이 커지고 있는 시점에 열린 2012 대한민국 녹색에너지대전은 '제4의 에너지'로 일컬어지는 신재생과 '제5의 에너지'인 에너지절약을 강조하는 행사로 다양한 에너지 문제에 대한 다양한 해법을 제시하였다. 지난 10월 9일부터 12일까지 코엑스에서 열린 '2012 대한민국 에너지대전'에서 대체에너지 생산과 에너지절약에 대한 지혜를 발견할 수 있었다. 녹색에너지대전, 신재생에너지대전, 녹색일자리엑스포 등 3가지 행사를 한 자리에서 볼 수 있었으며 '에너지절약시설자금 투자설명회'가 개최 돼 녹색에너지와 에너지절약을 궁금해 하는 일반인들과 에너지절약기업의 큰 관심을 끌었다. '2012년 대한민국 녹색에너지대전'은 에너지, 기후, 신재생 분야의 최신 제품, 기술, 정보 등 녹색 교류의 장이자, 동북아대표 기술교류 허브(Hub)로써 에너지효율, 기후변화-신재생에너지등 미래 에너지의 새로운 패러다임을 제시한 행사로 평가된다. 또한 에너지절약 차원으로는 에너지효율 향상을 주도하는 제품 및 기술 제안하여 보일러, 고효율조명, LED, 단열재, 하이브리드 자동차, 고효율가전기기, 전력수요관리설비 등 에너지효율 향상 제품이 전시되었고 기후변화대응과 녹색정책 및 기술 발표가 이어져 에너지 관련 공공기관, 협회 등 정책, 사업, 기술동향 등(CDM프로젝트, 탄소배출권 거래체, 탄소금융 사업 등)이 소개되었다.

• Journal of Information Management
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• v.37 no.3
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• pp.25-59
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• 2006

The primary purpose of this paper is to suggest the import and development models of foreign scholarly journals in Korea. In the context of the emerging knowledged-based economy or knowledge society, innovations and capacity of the national information system to collect, disseminate, and preserve the most important STM journals are becoming increasingly fundamental determinants of national prosperity and survival. It is essential that the scholarly or scientific communication system must provide the cost-effectiveness access to scholarly journals in support of research and development in Korea.

• Journal of Information Management
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• v.37 no.2
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• pp.51-74
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• 2006

The primary purpose of this paper is to suggest the import and development models of foreign scholarly journals in Korea. In the context of the emerging knowledged-based economy or knowledge society, innovations and capacity of the national information system to collect, disseminate, and preserve the most important STM journals are becoming increasingly fundamental determinants of national prosperity and survival. It is essential that the scholarly or scientific communication system must provide the cost-effectiveness access to scholarly journals in support of research and development in Korea.