• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2008년도 추계학술대회 논문집 Vol.21
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• pp.360-360
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• 2008

Steelmaking industry is widely known to use a lot of water and same amount of wastewater is generated. Although toxicity of wastewater from Steelmaking industry is low, it contains an amount of various organic materials and Fe-Oxides. It is important to recycle the wastewater because of water shortages and water pollution. In general, large-scale equipment is necessary to process the wastewater. On the other hand, superconducting high gradient magnetic separation (HGMS) system can process the wastewater in the small space. Superconducting HGMS system that had a purpose to purify the wastewater was assembled. Cryo-cooled Nb-Ti superconducting magnet was used for magnetic separator. This system can operate continuously because contaminated filters can keep on returning after cleaning. The various magnetic seeding reactions were investigated to increase the reactivity of coagulation. Filter cleaning system was developed to decrease the quantity of clean water. This research was supported by a grant from Korea Electrotechnology Research Institute, Republic of Korea.

• 한국안광학회지
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• 제12권1호
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• pp.35-40
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• 2007

우리나라 대부분의 안경 제조업체는 10인 이하의 영세 소규모 업체로 구성되어 있어 규모면에서 이태리, 중국 등 경쟁국에 비해 매우 열악한 수준에 놓여 있다. 이로 인해 국내 안경산업은 선진국의 고가제품과 중국등 동남아 지역의 저가 제품 사이에서 경쟁력을 확보하지 못하는 어려운 상황에 직면하게 되었다. 이러한 점들을 고려하여 볼 때 국내 안경산업의 활성화를 위해 가장 시급한 문제는 안경 제조업체의 구조조정으로 볼 수 있으며 디자인 개발능력 향상, 신소재 및 기술개발, 자체브랜드 개발 및 홍보강화, 기능성 안경 등 신제품 개발, 시제품(샘플) 제작기간 단축, 경영지원, 특구지정을 통한 경쟁력 확보 등도 우리나라 안경산업의 중요한 활성화방안으로 지적되고 있다.

• 한국산업융합학회 논문집
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• 제24권6_2호
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• pp.899-908
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• 2021

It is expected that the global market for vessel repair and remodeling will grow up to the scale of about 25 billion dollars by 2023. Korea's shipbuilding industry is leading the world with its international competitiveness in design and production technology. The actual status of vessel repair industry, however, is poor as there are only two or three companies for vessel repair that can deal with large vessels in the area of Gyeongnam. The reason is that civil complaints are filed severely about environmental problems and environment-related regulations are so strict that it is fairly hard to get governmental approval for the operation of a vessel repair workplace. Domestic vessel repair companies mainly target small- and medium-sized vessels. There are only few workplaces that can carry out regular examination or repair work on large vessels such as LNG vessels, and due to the high price of vessel repair, most of the domestic repair work on large vessels including LNG vessels tends to be snatched by markets in Southeast Asia or China. Despite the tremendous domestic demand of Korea that has established the world's first shipbuilding industry and world's sixth biggest harbor infrastructure, its vessel repair industry can be said to be in very poor condition. In order to vitalize vessel repair industry, this study is aimed to analyze the environmental influence of vessel repair workplaces in Gyeongnam where vessel repair companies are concentrated and suggest standard processes by analyzing vessel repair processes precisely.

• 한국산학기술학회논문지
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• 제17권10호
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• pp.131-138
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• 2016

본 연구는 국내외 건축행정시스템 실태 및 관계법령을 검토하고, 건축서비스산업 실태를 분석하여 건축행정시스템의 단계적 BIM 도입 범위를 제안하였다. 국내외에서 건축행정시스템의 BIM 도입은 대체로 미진한 상황이고 싱가포르만이 별도의 BIM 제출 서비스를 제공하는 등 선도적으로 BIM을 도입하고 있다. BIM 적용 대상 건축물에 대한 기준은 건축인허가 절차와 연속되도록 하는 것이 바람직하므로 관련법에서 규정하는 건축물의 규모 및 종류를 분석하여 단계적 도입 범위를 설정하였다. 각 범위에 포함되는 건축물 설계의 건축사사무소 규모별 참여비율을 분석한 결과 건축물의 층수와 연면적이 증가할수록 소규모 건축사사무소의 설계 수행 비율은 감소하고 대규모 건축사사무소의 비율은 증가하는 것으로 나타났다. BIM 도입이 대규모 건축사사무소 위주로 진행되고 있으므로 건축행정시스템의 BIM 도입은 대규모 건축물부터 점차 작은 규모의 건축물로 단계적으로 확산해 나가는 것이 바람직하다. 최종적으로 본 연구는 건축행정시스템의 BIM 도입을 6단계로 나누고 건축행정절차에 따라 세분한 BIM의 활성화 및 연착륙을 유도하는 로드맵을 수립하였다.

• 한국프랜차이즈경영연구
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• 제3권2호
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• pp.79-102
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• 2012

본 연구는 대형마트, 기업 형 슈퍼마켓 (SSM) 에 대한 출점 및 영업규제를 2009년 이전과 2009년 이후로 구분하여 연구하였다. 대형마트, 기업 형 슈퍼마켓 입장에서 영업 및 출점규제 법률시행에 따른 향후영향 및 대응 방안과 대안을 제시 하고자한다. 특히 2009년 이후 기업 형 슈퍼마켓의 출점 증가로 중소상인 보호를 위하여 유통법이 개정되어 출점과 영업규제 법률이 통과되고 조례제정을 통하여 규제가 현실화되었다. 이러한 법 개정이 외국사례와 국제법과 비교해서 그 타당성의 여부를 확인하고 향후방향을 제시했으며 실질적인 영세 상인임에도 오히려 과잉규제 대상이 된 프랜차이즈 슈퍼마켓 가맹점의 선의에 피해에 대한 법률적 구제방안도 제안하고자 한다. 본격적인 규제시행으로 유통업계는 해외진출 가속화, 유통업자 상표개발확대, 해외소싱상품 개발 등 경쟁력 강화를 위한 방안을 강구하고 중소상인과 대기업간의 상생모델인 프랜차이즈 가맹사업으로 사업방향을 전환하여 실질적인 상생협업모델을 추진하고 상생협력도 구축하면서 지속적인 성장을 추구해야한다.

• 한국콘텐츠학회논문지
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• 제21권4호
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• pp.88-95
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• 2021

수출산업으로 인하여 경제성장을 이루한 우리나라의 경우에는 외항운송업의 경제적 중요성이 매우 크다. 이는 정부가 주도적으로 외항운송 산업을 육성하였으며, 그 결과 세계 상위 10대 외항운송국가로 발전하게 되었다. 그러나 최근 들어 중·소 외항운송업의 부실경영과 국가 간 무역 분쟁으로 인해 외항운송업은 장기적인 침제기를 맞이하게 되었다. 따라서 이들 업체가 다시 회복하기 위해서는 무엇보다 운영상의 비효율성을 재정비하여 효율적인 생산 활동을 실시하여야 할 것이다. 이에 본 연구에서는 DEA 분석을 통해 비상장 국내 외항운송업 상위 10% 기업을 대상으로 경영효율성을 분석하며 비효율적인 기업의 투사값을 제시하며 벤치마킹의 대상이 될 수 있는 기업들의 참조집합을 확인하고자 한다. 이를 위해 총 10개 외항운송업을 대상으로 CCR와 BCC모형의 효율성과 규모수익성(RTS)을 분석하였다. 분석결과 BCC 효율성이 1인 기업은 총 6개 기업, CCR 효율성이 1인 기업은 총 5개 기업으로 나타났다. 그리고 BCC, CCR 효율성이 모두 1인 기업은 총 5개 기업이었다.

• 대한안전경영과학회지
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• 제3권3호
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• pp.11-21
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• 2001

Domestic construction industry has considerable level of construction performance and technology thanks to the economic development and as the result of performing diverse oversea construction project. However, construction disasters have been steadily increasing, and do severe disasters at faster pace. Most of such disasters happen at small and small medium-sized construction fields, which contract size is less than 10 billion won. small and medium-sized construction fields are not obliged to designate a safety manager, and have limitations in engaging self-regulating disaster prevention activities due to reduced budget for safety facilities. For the small and medium-sized construction sites with less than 10 billion won, the Ministry of Labor has been carrying out mobile inspections of construction safety. However, the effect so far is insignificant and an improvement plan is required. Therefore, in the present thesis, we derive problems appearing in the current construction safety mobile inspection system, investigate and study systems in foreign countries, and suggest an efficient and effective plan to operate safety technology inspections. First of all, we establish a standard to select sites to be inspected that are high in construction risk and disaster occurrence probability In addition, we suggest a plan to take administrative and judiciary measures based on the total score for disaster factors considering the disaster occurrence probability and the illegal practices. Furthermore, a scheme to maximize the effect of disaster prevention is sought by building an organic cooperative system between the Ministry of Labor, Korea Occupational Safety ＆ Health Agency and other organizations specialized in instruction of construction disaster prevention. Finally, we induce a research conclusion that leads to self-regulating safety management through checking and instructing systematic management on mobile inspections.

• Journal of Electrical Engineering and Technology
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• 제10권3호
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• pp.838-846
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• 2015

This paper deals with the modified modeling of PV system based on the PSCAD/EMTDC and optimal control method of customer voltages in real distribution system interconnected with the photovoltaic (PV) systems. In order to analyze voltage variation characteristics, the specific modeling of PV system which contains the theory of d-q transformation, current-control algorithm and sinusoidal PWM method is being required. However, the conventional modeling of PV system can only perform the modeling of small-scale active power of less than 60 [kW]. Therefore, this paper presents a modified modeling that can perform the large-scale active power of more than 1 [MW]. And also, this paper proposes the optimal operation method of step voltage regulator (SVR) in order to solve the voltage variation problem when the PV systems are interconnected with the distribution feeders. From the simulation results, it is confirmed that this paper is effective tool for voltage analysis in distribution system with PV systems.

• Journal of Microbiology and Biotechnology
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• 제31권3호
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• pp.349-357
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• 2021

Monoclonal antibodies are widely used as diagnostic reagents and for therapeutic purposes, and their demand is increasing extensively. To produce these proteins in sufficient quantities for commercial use, it is necessary to raise the output by scaling up the production processes. This review describes recent trends in high-density cell culture systems established for monoclonal antibody production that are excellent methods to scale up from the lab-scale cell culture. Among the reactors, hollow fiber bioreactors contribute to a major part of high-density cell culture as they can provide a tremendous amount of surface area in a small volume for cell growth. As an alternative to hollow fiber reactors, a novel disposable bioreactor has been developed, which consists of a polymer-based supermacroporous material, cryogel, as a matrix for cell growth. Packed bed systems and disposable wave bioreactors have also been introduced for high cell density culture. These developments in high-density cell culture systems have led to the monoclonal antibody production in an economically favourable manner and made monoclonal antibodies one of the dominant therapeutic and diagnostic proteins in biopharmaceutical industry.

• 국제학술발표논문집
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• The 5th International Conference on Construction Engineering and Project Management
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• pp.616-623
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• 2013

One of the oldest, most common engineering problems is measuring the dimensions of different objects and the distances between locations. In AEC/FM, related uses vary from large-scale applications such as measuring distances between cities to small-scale applications such as measuring the depth of a crack or the width of a welded joint. Within the last few years, advances in applying new technologies have prompted the development of new measuring devices such as ultrasound and laser-based measurers. Because of wide varieties in type, associated costs, and levels of accuracy, the selection of an optimal measuring technology is challenging for construction engineers and facility managers. To tackle this issue, we present an overview of various measuring technologies adopted by experts in the area of AEC/FM. As the next step, to evaluate the performance of these technologies, we select one indoor and one outdoor case and measure several dimensions using six categories of technologies: tapes, total stations, laser measurers, ultrasound devices, laser scanners, and image-based technologies. Then we evaluate the results according to various metrics such as accuracy, ease of use, operation time, associated costs, compare these results, and recommend optimal technologies for specific applications. The results also revealed that in most applications, computer vision-based technologies outperform traditional devices in terms of ease of use, associated costs, and accuracy.