• 대한기계학회:학술대회논문집
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• 대한기계학회 2008년도 추계학술대회A
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• pp.1409-1410
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• 2008

Layer manufacturing technology has been recently spotlighted as a promising candidate to fabricate porous scaffolds for tissue engineering, because it can provide three dimensional interconnectivity and different pore structures and on-demand scaffold design. This study aims to fabricate HA/PCL composite scaffolds for bone tissue engineering by a layer manufacturing technology, paste extruding deposition, and to characterize in vitro and in vivo biocompatibilities of the scaffolds. This study discusses the mechnical properties, proliferation and differentiation of osteogenic cells, and tissue in-growth and bone regeneration behavior using animal models.

• 기술혁신학회지
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• 제14권3호
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• pp.405-430
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• 2011

본 연구는 한국 제조기업들이 외부지식을 적극적으로 활용하게 하는 요인들을 고찰한다. 관련문헌들에 의하면 기업의 혁신성과 보호전략 (appropriability strategy), 흡수능력 (absorptive capacity), 기술분야 창업기업여부 (technology entrepreneurship), 기업규모 그리고 산업별 기술발전기회 등이 외부지식 활용을 결정하는 요인들이라고 주장되고 있다. 본 연구는 이러한 요인들 중에서 한국 제조기업들의 외부지식활용도에 실제로 영향을 미치는 것들은 무엇인지를 한국 제조업 분야 혁신활동조사 자료 (Korean Manufacturing Innovation Survey)를 활용하여 분석한다. 그 결과들은 다음과 같다. 첫째, 기업들이 혁신성과 보호 메커니즘을 적극적으로 활용할수록 외부지식 활용도가 높다. 둘째, 고등교육을 받은 종업원들의 비중이 높은 기업일수록 외부지식을 더 많이 활용한다. 셋째, 기술분야 창업기업일수록 외부지식 활용도가 높다. 넷째, 규모가 큰 기업일수록 외부지식을 더 많이 활용한다. 다섯째, 기술 발전기회가 더 많은 산업에 종사하는 기업일수록 외부지식 활용도가 높다. 특히 한국 제조기업들의 경우 고등교육을 받은 종업원들의 비중과 기술분야 창업기업여부가 다른 요인들보다 외부지식활용에 더 영향을 미치고 있다고 분석되었다.

• 복식
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• 제58권8호
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• pp.63-73
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• 2008

From the ancient Korea to the late Joseon Korean fur and leather had been preferred in and out of Korea for their good quality and excellent manufacturing skill. Since Unified Silla (A.D.676${\sim}$A.D.936) Korean fur and leather were manufactured divisionally by workmen specialized in materials and products, and such manufacturing process was succeeded to Goryeo and Joseon. Manufacturing of fur and leather was consisted of as follows: hunting and butchering - peeling - beating with a paddle and removing fat - oil manufacturing - drying - tanning, then cutting and sewing, and there was a special caring method. In order to make good fur and leather, each process of manufacturing needed particular techniques and all available methods were tried to have tender fur and leather by using smoking, excrement, lime, vegetable tannin and even cerebral liquid. And also required mouth-chewing and hand-pounding with a lot of time and of labor Keeping furs resilience and flexibility, sowing several skins together, even when the after-all-process skin was converted into clothes, was much more difficult than sewing fabric. Thus, the manufacturing cost was as much expensive as skin materials, and the volume of manufacturing of fur and leather was also limited. Therefore, fur and leather must have been popular for scarcity value in the manufacturing process, and this scarcity must have caused an extreme luxury of fur.

• Journal of Platform Technology
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• 제9권1호
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• pp.15-22
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• 2021

In a smart manufacturing environment, more and more devices are connected to the Internet so that a large volume of data can be obtained during all phases of the product life cycle. The large-scale industries, companies and organizations that have more operational units scattered among the various geographical locations face a huge resource consumption because of their unorganized structure of sharing resources among themselves that directly affects the supply chain of the corresponding concerns. Cloud-based smart manufacturing paradigm facilitates a new variety of applications and services to analyze a large volume of data and enable large-scale manufacturing collaboration. The manufacturing units include machinery that may be situated in different geological areas and process instances that are executed from different machinery data should be constantly managed by the super admin to coordinate the manufacturing process in the large-scale industries these environments make the manufacturing process a tedious work to maintain the efficiency of the production unit. The data from all these instances should be monitored to maintain the integrity of the manufacturing service system, all these data are computed in the cloud environment which leads to the latency in the performance of the smart manufacturing service system. Instead, validating data from the external device, we propose to validate the data at the front-end of each device. The validation process can be automated by script validation and then the processed data will be sent to the cloud processing and storing unit. Along with the end-device data validation we will implement the APM(Asset Performance Management) to enhance the productive functionality of the manufacturers. The manufacturing service system will be chunked into modules based on the functionalities of the machines and process instances corresponding to the time schedules of the respective machines. On breaking the whole system into chunks of modules and further divisions as required we can reduce the data loss or data mismatch due to the processing of data from the instances that may be down for maintenance or malfunction ties of the machinery. This will help the admin to trace the individual domains of the smart manufacturing service system that needs attention for error recovery among the various process instances from different machines that operate on the various conditions. This helps in reducing the latency, which in turn increases the efficiency of the whole system

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2018년도 추계학술논문요약집
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• pp.143-144
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• 2018

In order to develop innovative metallic fuels with improved economy and enhanced safety of SFR, it is necessary to develop powder manufacturing technology for applying additive manufacturing technology.

• 한국건설관리학회논문집
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• 제23권1호
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• pp.113-117
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• 2022

적층제조(AM, 일명 3D프린팅)기술은 디자인 자유도가 높고 디지털화된 기술의 특성으로 품질데이터의 예측·관리가 용이한 형태로 존재한다. 이러한 이점으로 AM기술은 다양한 산업에 적용되고 있다. 특히 건축물과 기반시설을 AM기술로 제조하는 방법이 건설 산업에 제안되고 있다. 다만, 다소 부족한 기술의 역사와 품질 및 시공 관리방법의 미비, 제조상품의 인증과 같은 문제로 인해 기술사용이 제한되고 있다. 따라서 간접적인 형태로 AM기술을 활용하여 건축 상품제조를 구현하고 있다. 특히, 거푸집을 적층 제조하고 건축 소재를 투입하여 상품으로 구현하는 방법이 확인되고 있다. 본 연구에서는 대형크기의 거푸집을 적층제조하고 건축 상품을 구현하기 위해 하이브리드 압출적층제조를 활용한다. 또한, 적층제조과정에서 생산성과 경제성을 예측할 수 있는 인자를 확인한다. 결과적으로, 건축물의 구현결과와 생산 비용과 시간을 줄이기 위한 형상설계 최적화 방법을 제안한다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 2007년도 춘계학술대회 논문집
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• pp.37-37
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• 2007

• 한국생산제조학회지
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• 제8권4호
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• pp.7-12
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• 1999

• 한국생산제조학회지
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• 제4권2호
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• pp.5-8
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• 1995

• 한국생산제조학회지
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• 제4권2호
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• pp.9-11
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• 1995