• 한국안전학회지
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• 제20권3호
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• pp.164-173
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• 2005

In this paper, the systematic problems of safety management in domestic construction industry are presented by the investigation and analysis of construction fatal injuries. In particular, it is discussed that the current construction safety management system by contractors leading is ineffective to prevent the serious accidents caused by inappropriate planning and design and to circulate the safety management cycle without interruption. A couple of ways for improving domestic construction safety management system are suggested in broad perspective. This is done by the analysis of construction safety management system of four advanced industrial countries such as the United States, the United Kingdom, Germany, and Japan and the study of a best practice. Total safety management system by owners leading is recommended to prevent construction accident effectively because this system makes all the parties join to the management system and distribute the responsibilities clearly to each party. This will drop the accident occurrence rate by dragging all the parties' cooperations and activating the total safety management system in an early stage.

• 한국응용약물학회:학술대회논문집
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• 한국응용약물학회 1997년도 춘계학술대회
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• pp.12-12
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• 1997

CFC-222 is a novel fluoroqinolone antibacterial agent synthesized and under development by the Cheil Jedang Corporation, Korea. CFC-222 exerts the antibacterial activity by inhibition of bacterial DNA gyrase leading to bactericidal action. In in vitro and in vivo preclinical testing, CFC-222 has been shown to possess a broad spectrum of antibacterial activity. In particular CFC-222 is very potent against Gram-positive bacteria such as Staphylococcus spp., Streptocuccus spp. (in particular penicillin G-resistant and -susceptible S. pneumoniae) and Enterococcus spp. when compared to other quinolones (ciprofloxacin, ofloxacin or lomefloxacin). CFC-222 also showed potent activity against the methicillin resistant clinical isolates of S. aureus (MRSA). Against Gram-negative bacteria (E. coli, Pseudomonas and Sarcina) the activity of CFC-222 was slightly weaker than that of ciprofloxacin, but was more potent than that of ofloxacin or lomefloxacin. In urinary systemic infections caused by both Gram-positive and -negative bacteria, CFC-222 demonstrated a potent therapeutic efficacy in particular against Cram-positive bacteria S. aureus, S. pyrogen 203 and S. pneumonia TypeIII.

• International Journal of Fluid Machinery and Systems
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• 제1권1호
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• pp.47-56
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• 2008

The flow behind the variable area nozzle which corresponds to the flow at the leading edge of the impeller was measured with a 3-hole yaw probe and calculated with CFD. Two nozzle throat-areas were investigated. One is the smallest and the other is the largest opening for the variable nozzle. Test results agreed with the calculated results qualitatively. The leakage flow through the tip clearance of the nozzle vane significantly affected the flow field downstream of the nozzle vane with the smallest opening. However, the effect on leakage flow on the flow field downstream of the nozzle vane with the largest opening was very weak and the effect of wake is dominant.

• 한국수소및신에너지학회논문집
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• 제31권4호
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• pp.380-386
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• 2020

This paper represents an analysis of the economic impact of firing natural gas/diesel and natural gas/by-product oil mixtures in diesel engine power plants. The objects of analysis is a power plant with electricity generation capacity (300 kW). Using performance data of original diesel engines, the fuel consumption characteristics of the duel fuel engines were simulated. Then, economic assessment was carried out using the performance data and the net present value method. A special focus was given to the evaluation of fuel cost saving when firing natural gas/diesel and natural gas/by-product oil mixtures instead of the pure diesel firing case. Analyses were performed by assuming fuel price changes in the market as well as by using current prices. The analysis results showed that co-firing of natural gas/diesel and natural gas/by-product oil would provide considerable fuel cost saving, leading to meaningful economic benefits.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 추계 학술발표회
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• pp.269-281
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• 2010

The cone penetration test(CPT) has been increasingly used for in situ site characterization. However, the use of CPT is often limited due to specific site conditions depending on the cone size, geometry, and capacity of the CPT system used. In South Korea, it has generally been considered that the CPT could be satisfactorily performed only in soft soils. Louisiana State University/ Louisiana Transportation Research Center has implemented a field-rugged continuous intrusion miniature cone penetration test (CIMCPT) system since the 1990s. The miniature cone penetrometer of the CIMCPT system has a cross-sectional cone area of $2cm^2$ allowing finer soil profiles compared to the standard $10cm^2$. The reduced cross-sectional area also enables a system capacity reduction leading to cost saving and ease in maintenance. In addition, the continuous intrusion mechanism allows fast and economic site investigations. Samsung C&T Corporation has recently implemented a similar CIMCPT system. In this study, case studies on the field application of Samsung CIMCPT system for the last 2 years are presented to illustrate its performance investigation and its usefulness and limitation. Results of the case studies show that the CIMCPT system can be applied to soils with cone tip resistance($q_c$) values up to about 30MPa and allows a reliable and useful way to characterize soft soils. The results also show that the rod buckling limits the investigation depth by the system and the large contact pressure of the CIMCPT truck prevents the use of the system at sites with soft surface soils. According to the results of the case studies, the Samsung CIMCPT system has been being upgraded with a miniature cone with a longer rod, a crawler-type transportation system, a pre-boring system, and so on.

• 한국기계가공학회지
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• 제19권11호
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• pp.1-7
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• 2020

Recently, hydrogen has gained considerable attention as an eco-friendly fuel, which helps in reducing carbon dioxide content. Specifically, there is a growing interest in vehicles powered by a hydrogen fuel cell, which is spotlighted as an environmental-friendly alternative. A hydrogen transport system, fuel cell system, fuel supply system, power management system, and hydrogen storage system are key parts of a hydrogen fuel cell truck. In this study, a hydrogen storage system is built and analyzed. The expansion length of the storage vessel at maximum operating pressure (87.5 MPa) was calculated with ABAQUS, and then the optimized system was designed and built. The leak and bubble tests were performed on the built storage system. The leakage of the system was measured to be under 5 cc/hr. Hence, it can be used as a research test for the safety evaluation of leading systems of hydrogen fuel-powered commercial vehicles.

• 한국가스학회지
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• 제25권6호
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• pp.85-91
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• 2021

정부는 2019년 1월 세계 최고 수준의 수소경제 선도국가로 도약하기 위해 「수소경제 활성화 로드맵」을 발표했으며, 우리나라가 강점이 있는 수소자동차와 연료전지를 양대 축으로 수소경제를 선도할 수 있는 산업생태계 구축 전략을 세웠다. 그 일환으로 2022년 310개소, 2040년 1,200개소의 수소충전소 보급목표를 수립하였다. 이에 발맞춰 2021년 2월 한국가스안전공사는 속도감 있는 수소충전소 구축을 위해 시공단계에서 안전기준에 따른 다양한 현장 문제 발생으로 인한 시공지연을 사전해소하기 위한 수소충전소 사전컨설팅 제도를 운영하게 된다. 본 논문은 사전컨설팅 제도에 대해 알아보고 그 효과를 분석하고자 한다.

• 월간포장계
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• 통권244호
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• pp.111-117
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• 2013

(주)시눅프리미디어는 캐나다에 있는 Flexible Packaging Leading Company로서 북미 대표 한인기업인 Flair(대표 서영철, Flexible Packaging Corporation)가 한국 내 인쇄 품질관리를 위하여 2010년에 설립한 회사이다. (주)시눅프리미디어는 한국 그라비어 인쇄업계의 품질관리 수준 향상과 세계추세를 선도하는 품질관리를 목표로 2011년 부터 CMS(Color Managemant System에 의한 정량적 색상관리를 실무에 적용하여 시행 중이다. 국내 그라비어 인쇄 업계도 국제적으로 경쟁력 있는 제품을 만들기 위해서는 정량적 품질관리가 반드시 요구될 수 밖에 없다. 따라서 2년여 기간 동안 (주)시눅프리미디어의 협력사(플레이트 제조사, 인쇄사)가 실무 중에 경험한 사례를 소개함으로써 국내 그라비어 인쇄업계에 도움이 되기를 희망한다.

• 월간포장계
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• 통권240호
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• pp.88-95
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• 2013

(주)시녹프리미디어는 캐나다에 있는 Flexible Packaging Leading Company로서 북미 대표 한인기업인 Flair(대표 서영철, Flexible Packaging Corporation)가 한국 내 인쇄 품질관리를 위하여 2010년에 설립한 회사이다. (주)시녹프리미디어는 한국 그라비어 인쇄업계의 품질 관리 수준 향상과 세계추세를 선도하는 품질관리를 목표로 2011년 부터 CMS(Color Managemant System에 의한 정량적 색상관리를 실무에 적용하여 시행 중이다. 국내 그라비어 인쇄 업계도 국제적으로 경쟁력 있는 제품을 만들기 위해서는 정량적 품질관리가 반드시 요구될 수 밖에 없다. 따라서 2년여 기간 동안 (주)시녹프리미디어의 협력사(플레이트 제조사, 인쇄사)가 실무 중에 경험한 사례를 소개함으로써 국내 그라비어 인쇄업계에 도움이 되기를 희망한다.

• 디지털융복합연구
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• 제16권10호
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• pp.69-78
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• 2018

본 연구의 목적은 창업사관학교의 운영사례와 성과에 대한 분석을 통해 정책적 시사점을 찾기 위한 것이다. 연구의 방법은 창업사관학교 운영 과정에 산출된 데이터를 이용한 통계적 분석을 활용하였다. 연구 결과 성별과 나이에 따른 단기성과의 차이가 있다. 두 번째, 입소자 선정평가는 단기성과와의 상관관계가 없고, 오히려 세부 서류평가 부분은 음의 상관관계가 나타났다. 세 번째, 멘토에 따라 단기성과의 차이가 없다. 전략적 활용 방안은 창업사관학교에 대한 평가에서 창업자의 단기성과에 대한 반영을 축소해야한다는 것이다. 그리고 입소자 선정 평가방법을 개선할 필요가 있다는 것이라는 것이다. 본 연구의 한계점으로 통계분석을 통한 실증연구가 되기에 부적절하다는 점으로 정책 시사점의 근거도 취약성을 내포하고 있다. 그리고 통계분석으로는 케이스 수가 충분하지 못한 점이다. 따라서 향후 여러 대학의 사례를 포함시켜 케이스 수를 늘인 실증연구를 진행코자한다.