• The Optical Journal
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• s.148
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• pp.16-18
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• 2013

3D 프린팅은 디지털 디자인 데이터로 3차원의 물체를 만들어내는 기술로, 공장 없이도 제품을 만들 수 있는 미래 기술로 불린다. 프린터에 넣는 재료가 다양해지고 실제 이용할 수 있는 범위가 넓어지면서 미래 고부가가치 산업으로도 꼽힌다. 미국 컨설팅기관 홀러스 어소시에이츠(Wohlers Associates)는 세계 3D 프린터 시장이 연평균 29%씩 성장할 것이며 2015년 37억 달러에서 2019년이 되면 65억 달러를 넘어설 것으로 내다봤다. 미국, 중국, 일본 등은 이미 정부와 민간 차원에서 산업활성화 노력이 활발하다. 3D 프린팅 기술의 국산화에 성공하고 세계 시장에 도전하고 있는 중소기업이 있어 화제다. 한국 최초로 산업용 3D 프린팅 기술을 개발한 캐리마가 바로 그 주인공이다. 이 회사는 국내 유일 광조형 3D 프린터 원천기술을 바탕으로 제품을 개발해 최근 양산 체제를 갖추었다. '가진 것이라곤 장래가 불투명한 기술밖에 없는 중소 기업'에서 '국내 유일의 3D 프린터 제조업체'로 불리게된 캐리마를 찾아가 이병극 대표의 이야기를 들어봤다.

• 전기의세계
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• v.27 no.3
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• pp.54-58
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• 1978

정부의 중화학공업 육성시책에 힘입어 1976년과 1977년은 각 업체가 심각한 각축전을 벌린 해인 것같다. 1969년에 효성중공업이 154kV 급변압기 개발에 성공한 이래 수년간 독점해오던 초고압 변압기는 1976년 12원에 국제전기가, 1977년 1원에 쌍용전기가, 동년 7월에 대명제작소가 각각 시작품을 성공적으로 제작함으로써 독점시대의 막이 내려가고 치열한 경쟁체제로 돌입하게 됐다. 따라서 국내 수요보다 생산능력이 초과하게 되는 결과가 됐다. 효성중공업은 창원에 대단위 공장을 건설하고 최신시설과 대형 공작기계를 갖춤으로서 345kB 변압기 개발에 착수하였고 현대중공업, 현대양행이 중전기에 코오롱그룹이 국제전기의 경영에 각각 참가하였으며 이천전기는 일본 도시바전기와 합작하고 현대중공업과 현대양행이 참여함으로서 중전기기 분야는 전국시대를 맞는 감이며 치열한 경쟁을 앞으로 면치 못할 것같다.

• Electronics and Telecommunications Trends
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• v.23 no.1 s.109
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• pp.1-11
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• 2008

임베디드 시스템이라 함은 우리가 생활하는 주변에서 흔히 접할 수 있고, 얘기만 들어도 쉽게 이해할 수 있는 PDA, 스마트폰, MP3 플레이어, 셋톱박스 등의 정보가전 기기들을 비롯하여 로봇, 텔레매틱스, 공장자동화, 군사기기와 센서노드에 이르는 디지털 기기들에 컴퓨터가 내장되어 들어가 있는 시스템을 의미한다. 이러한 임베디드 시스템은 도래하고 있는 디지털 컨버전스 시대에서 모바일 및 정보가전기기로 그 사용성이 날로 확대되어 가고 있으며, 현 시점에서도 각 개인이 이미 최소한 하나씩의 임베디드 기기를 휴대하고 있을 정도로 임베디드 기기에 대한 의존도는 상당히 높다고 할 수 있다. 이렇듯 임베디드 기기에 대한 높은 의존성으로 인해 향후 지금보다 더 많은 개인 정보를 임베디드 기기에 저장하게 될 것으로 예상되는데, 이에 따라 갈수록 사용이 많아질 임베디드 기기 내의 개인 정보의 보안성에 대한 관심이 증폭되고 있으며, 본 고에서는 이와 관련된 최근의 임베디드 보안 기술에 대해 설명하도록 한다.

• Journal of the KSME
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• v.30 no.1
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• pp.9-16
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• 1990

CIM기술은 기업체 지원형 및 국산화형 생산기술과 더불어 필수적이고 상호 보완적인 산업기술이 고 또한 첨단제품기술 및 원천과학기술과의 연계가 가능한 접속(interface) 기술이다. 동시에 이의 연구개발은 다분야 공동참여적인 (multi-disciplinary) 기술적 배경을 필요로 하며 산업계 연구 수 행과 종속적이고도 이원적인 연구 체제가 필요하다. CIM기술개발의 예로서 제품 설계에서부터 설계의 해석 및 평가, 금형 설계, 공장 설계, 가공, 사상 및 측정. 검사까지의 과정과 생산통제를 포함하는 제반 생산 행위를 컴퓨터를 이용하여 생산 정보를 통합 제어함으로써 합리적인 금형 생산을 위한 사출 금형의 모델 플랜트를 소개하였다. 이 모델 플랜트는 설계, 공정 설계/NC, 연마, 측정. 검사, 시스템 통제의 5개 스테이션으로 구성되며, 각 스테이션에서의 중단위 통합 모델이 테스트되었다. 향후, 스테이션 간의 정보 흐름이 완전히 통합되면 금형업체는 물론 많은 제조업체에서의 광범위한 CIM기술 활용이 기대된다.

• Korean Chemical Engineering Research
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• v.58 no.3
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• pp.346-355
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• 2020

This study proposed a new optimization-based decision model for an enterprise resource planning and production scheduling of a pharmaceutical intermediates manufacturing plant. To do this work, we first define the inflow and outflow information as well as the model structure, and develop an optimization model to minimize the production time (i.e., makespan) using a mixed integer linear programing (MILP). The unique feature of the proposed model is that the optimal process scheduling is established based on real-time resource logistics information using a radio frequency identification (RFID) technology, thereby theoretically requiring no material inventories. essential information for process operation, such as the required amount of raw materials and estimated arrival timing to manufacturing plant, is used as logistics constraints in the optimization model to yield the optimal manufacturing scheduling to satisfy final production demands. We illustrated the capability of the proposed decision model by applying the optimization model to two scheduling problems in a real pharmaceutical intermediates manufacturing process. As a result, the optimal production schedule and raw materials order timing were identified to minimize the makespan while satisfying all the product demands.

• Korean Journal of Heritage: History & Science
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• v.54 no.2
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• pp.216-239
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• 2021

Inlay (入絲), a poetic technique of digging grooves in the surface of crafts and decorating them with metal materials, was used throughout the royal daily routines, ceremonies and government officials of the Joseon Dynasty. The government-owned handicraft industry in the Joseon Dynasty was composed of craftsmen belonging to central and local government offices and was operated mainly by government-owned craftsmen. The inlay craftsman was transferred to the central government office and was in charge of inlay poetry for crafts. The current records of Korean inlay craftsmen are concentrated in the state-owned handicraft industry. In the state-owned handicraft industry, the government offices of inlay craftsmen can be divided into Kongjo (工造), Sangeuiwon (尙衣院), and the military. Here the election of a temporary government office for airspace is added. The government offices and military inlay craftsmen who use inlay crafts are assigned, and the inlay craftsmen are placed separately in the temporary office where the fine division of labor is developed. It can be made by utilizing craftsmen. The operation of these production systems was indispensable in pre-modern Korean society, where crafts had to be produced by hand. In this paper, we investigated the roles and job types of craftsmen in the state-owned handicraft industry during the Joseon Dynasty, focusing on inlay craftsmen. Although the details applied to the characteristics and materials of the field, labor supply and demand, etc. are different, Korea pursued crafts for various purposes through craftsmanship within the framework of the basic state-owned handicraft policy . The institutional equipment for implementation was almost common. We believe that adding and analyzing some literature records and relics will help us to study the crafts of the Joseon era in more detail.

• Journal of the Korean association of regional geographers
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• v.7 no.2
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• pp.17-34
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• 2001

This paper is to analyze how firms in a large firm-led industrial city have carried out the restructuring in the face of radical shifts, with focus on the strategy and the restructuring of firms in Ulsan, a typical industrial district in Korea that is specialized in heavy & chemical industry. It has been well known that the local economy has been led by a small number of large firms, including affiliates of chaebol, and its industrial structure has also been characterised as a clear dichotomy between large firms as a customer and small and medium-size firms as a supplier, which can be called not horizontal but vertical relations. It can identify some tendencies, however, that local companies have been rather dynamically changing in response to increasingly turbulent environment since the Asian crisis. Some are radical, but some incremental. These can be summarized in four distinctive but interlinked ways. First, more than half of local companies surveyed have attempted to change their production systems, mainly from the fordist mass production towards the flexible mass production, seeking both economies of scale and scope. Second, local firms have vigorously continued to reorganize the boundary of the production and the organization, by specializing products and focusing on the core competence in order to save costs and cope with radically changing customer demands in a flexible way. Third, there have been various strategies for the organizational innovation such as the introduction of team organization, the boundary blurring between the managerial and production workers and the intra-firm spin-offs, so as to improve managerial efficiency and competence in the use of internal labour market. Finally, they have tried to be more sensitive to the market and customers. These tendencies seem to be increasingly critical to sustain their competitiveness. To do so, they tend to focus increasingly not only on the competing via the product quality rather than through price, but also to seek to diversify the market and customer firms beyond national boundary.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.18 no.2
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• pp.197-207
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• 2018

SMEs manufacturing Factory, which are small-scale production systems of various types, mass-produce and sell products in order to meet customer needs. This means that the company has an excessive amount of material supply to reduce the loss due to lack of inventory and high inventory maintenance cost. And the products that fail to respond to the demand are piled up in the management warehouse, which is the reality that the storage cost is incurred. To overcome this problem, this paper uses ARIMA model, a time series analysis technique, to predict demand in terms of seasonal factors. In this way, demand forecasting model based on economic order quantity model was developed to prevent stock shortage risk. Simulation is carried out to evaluate the effectiveness of the development model and to demonstrate the effectiveness of the development model as applied to SMEs in the future.

• Journal of the Korean Institute of Intelligent Systems
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• v.17 no.3
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• pp.336-342
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• 2007

Industrial HMI(Human Machine Interface) system is the main element among the factory automation processes and have been used to monitor and control operation and status of machine in factory with PLC. This HMI often brings heavy loads to the system development and difficult decreasing the system because it tends to use a specific system per each manufacturer. Therefore, in this thesis, we have developed an embedded linux-based embedded industrial HMI software modules which can be used for touch panel embedded system to solve these problem. In this module, we have used the Qt/Embedded software component because it can be used by all systems which support C++ compiler without modifying the existing codes. We can design more flexible system and network configuration because we have used the wireless communication module. In this thesis, we implement linux-based HMI software modules which are capable of wireless communication as well as bringing the mobility to the overall system and finally decreasing the system development loads by using the general purpose OS with competitive price.

• Journal of Korea Society of Industrial Information Systems
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• v.24 no.2
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• pp.65-80
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• 2019

With the advent of the ICT-based 4th industrial revolution, the convergence of the manufacturing industry and ICT seems to be the new breakthrough for achieving the company's competitiveness and play a role on the key element for accelerating the revival of the manufacturing industry. When the smart factory is implemented, each plant can analyze the quantity of data collected, build the data-driven operation systems which can make decisions, and ultimately discover the correlation among many events in the manufacturing sites. As the customers' needs become diversified more and more, it is required for the company to change its operating method from large quantity batch production systems to customizable and flexible manufacturing systems. For performing this requirements, it is essential for the company to adopt the smart factory. Based on technology acceptance model (TAM), this study investigates the factors influencing continuous use intention and switching intention of the smart factory. To do so, a questionnaire survey is conducted both online and offline. 122 samples are used for the study analysis. The results of this study will provide many implications with many researchers and practitioners relevant smart factories.