• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.50 no.9
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• pp.647-655
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• 2022

The Russian government is expanding strategic cooperation with foreign countries, including production partnerships, in order to secure civil aircraft manufacturing technology and advanced materials, with the aim of becoming the world's third-largest civil aircraft producer. In addition, the Russian government supports the development of the aircraft manufacturing industry and reorganizes the aircraft certification organization to pursue systematic aviation safety and make great efforts in international cooperation and certification activities for the export of aviation products. Establishing a cooperative system for safety and certification of civil aircraft between countries requires a process of mutual understanding and trust in the overall certification system. Therefore in this study, we wanted to analyze Russia's aircraft certification organization, law system, certification procedures to help Russia understand its aircraft certification system.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.627-630
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• 2008

부서마다 하드웨어 및 시스템 자원을 독립적으로 관리하는 조직에서 보안 관리와 같은 일부 중요한 기능을 전체적으로 통제하고 관리하기 위해서는 각 부서에서 운영하는 시스템과 연동하는 통합 시스템이 필요하다. 본 논문에서는 웹 서비스를 활용하여 분산된 각 부서의 웹 시스템에 공용 서비스를 제공 및 관리함으로써, 각 부서의 특화된 시스템에 영향을 최소화하고 주요 기능은 전체적으로 관리 통제할 수 있는 시스템 설계에 대해 다룬다.

• Korean Architects
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• s.560
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• pp.130-133
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• 2015

제127차 UIA 이사회가 페루 수도 리마 해변에 위치한 Wyndham Costa del Sol Hotel에서 2015. 11. 6 ~ 7일 양일간에 거쳐 개최되었다. 참석자는 회장 Esa Mohamed를 포함한 사무총장, 재무관, 각 지역부회장, 전임회장, 각 지역이사와 대리이사, 교육위원장, 실무위원회위원장, 설계경기위원장과 공동위원장 등으로 총 약 40여명이 참석하였다. 우리가 포함된 제4지역에서는 부회장인 필리핀 Yolanda Reyes가 건강상 이유로 불참했고 중국, 인도, 호주 대표와 본인과 한영근 대리이사가 참석하였다. 둘째 날에는 UIA 2017 서울세계건축대회 준비사항을 보고하기 위한 한종률 조직위원장, 이건기 전서울시 부시장, 정유승 국장 그리고 조직위와 동행한 서울시과장, 팀장 등이 참석하였다. 본 이사회는 FPAA(판아메리카 건축사 연합회)이사회와 동시에 같은 건물 내에서 개최되었다.

• Proceedings of the KAIS Fall Conference
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• 2008.05a
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• pp.63-67
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• 2008

기업의 성과는 기업이 갖고 있는 유형, 무형의 자산 운용 결과이므로 성과측정은 유형, 무형의 모든 측면에서 이루어져야 할 것이다. 그러나 측정하고자 하는 대상이 반드시 정량적 결과를 확보하고 있다는 보장이 없으므로 객관적 성과측정에 대한 신뢰를 확보하기가 쉽지는 않다. 특히 대기업과 중소기업의 조직 생성과 운용 방식이 근본적으로 상이하므로 측정 방식도 다를 수밖에 없다. 본 연구는 중소기업에 적합한 성과측정의 관점을 직무, 태도, 능력, 자격의 관점으로 제시하였으며 조직성과측정보다는 개별측정 방식을 권고하였다. 또한 시스템의 구성은 사용자와 팀장 및 BSC 담당자로 구성하여 BSC 서버를 중심으로 각 사용자의 인터넷 계정을 통하여 입력하고, 평가하고, 승인할 수 있도록 하였다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.13 no.4
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• pp.119-125
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• 2007

In recent days, the consumption of stainless steel in the propulsion shafting systems for small-medium class vessel is increased due to its high corrosion protection with wear resistant properties. Unfortunately the small and medium class vessel that operated in the west-south sea area of Korean peninsula experienced heavy wear down due to the role of mud. In the event of wear or broken down, the propeller shaft must be replaced by new one, but the new shaft is very expensive and time-consuming for order made supply. In this case, the methods of built up for wear and broken shaft by welding is one of the most effective cases. In this study, the built up welding for austenitic stainless steel shaft has been accomplished by various pre-surface treatment, welding methods, post heattreatment and inspection. The results confirmed that the built-up welding was one of the effective methods for stainless steel shafting.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.9 no.3
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• pp.815-821
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• 2008

Performance of corporation results from operation of tangible and intangible assets. Thus, measuring performance need to be taken place in terms of tangible and intangible aspects. However, the research objects, in the measurement of performance, do not guarantee researchers to achieve quantitative results and it is difficult to have objectivity. There are also many different points between a big enterprise and a small-medium size company. These facts require new measurement methods. This study suggests aspects of measurement method as task, attitude, ability and qualification for small-medium size companies. Specially, this study suggest individual measurement method than organizational one. The research system consists of users, team leaders and staffs charge of BSC and the users can access BSC sewer to input, to evaluate and to prove data through their own accounts.

• Proceedings of the Korean Society of Marine Engineers Conference
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• 2006.06a
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• pp.29-30
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• 2006

나이모닉 일체형으로 사용되고 있는 선박용 2 행정 저속엔진의 배기밸브 스핀들을 고온, 고압, 배기가스 및 반복 충격 하중에 노출된 스핀들의 Head부분은 기존의 나이모닉 소재를 적용, 기존 재질의 우수한 성질을 유지하고 설계적으로 나이모닉 소재의 적용이 불필요한 Stem부는 오스텐나이트 계열의 SNCrW 소재를 사용하여 관성마찰 용접 방식으로 접합하여 제품을 제작하고, 접합부의 미세조직 관찰, 성분분석, 인장, 경도, 피로시험 등의 기계적, 금속적 특성평가를 통해 마찰용접제품에 대한 신뢰성을 확인하고 양산 생산을 위한 기술적 토대를 마련하였다.

• Korean Journal of Construction Engineering and Management
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• v.18 no.3
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• pp.22-32
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• 2017

Judging from the past cases, the contractor has frequently suffered losses caused by disapproved requests or reduced payments since it has not known the conditions of the contract or it has filed a claim to the owner without any proper claim system. Therefore, the existing claim process needs to be reformed. In order to reform the claim process, the contractor should consolidate the organizational structure, grant accurate duty assignments to the claims manager, implement regular staff training on how to deal with claims. In addition to this reformation, the contractor needs to improve the management of construction period and process control, and manage related documents thoroughly. Regular meetings are also necessary in claims. This study attempts to prove the effectiveness of the reformed process applied to Project "A", where the owner was responsible for the delayed supply of materials, inaccurate oral instructions, insufficient information on the work, and frequent changes of design. The project was completed in 96 months, which was extended by 34 months from the initial construction period of 62 months. The reformed claim process is expected to be of great help not only to largescale construction works but also to smallscale ones.

• Korean Journal of Construction Engineering and Management
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• v.24 no.3
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• pp.31-41
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• 2023

This study is a study to develop a configuration management methodology for efficient and systematic management in the event of configuration changes such as deformation, explosion, and remodeling of launch vehicle development test facilities, which are emerging as important national facilities in the era of full-scale space competition. Through the analysis of international standards for configuration management, a configuration management process framework to be applied to launch vehicle development test facilities is extracted, a survey was conducted on experts who performed life cycle engineering of launch vehicle development test facilities, and a configuration management methodology optimized for operation/management of domestic launch vehicle development test facilities was proposed. Identify the configuration for launch vehicle development test facilities, the configuration management manager, configuration management organization, and configuration management board approve/process the configuration changes, and after construction is completed according to design requirements, launch vehicle development test facilities try to manage the configuration in a controlled state.

• Journal of Chest Surgery
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• v.29 no.10
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• pp.1111-1117
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• 1996

Structural deterioration of the bioprosthetic xenograft valves due to primary tissue failure occurs in two modes: from fatigue lesions with tear and wear with or without calcification and from calcification with obstruction. Two groups of consecutive 56 patients with the Hancock porcine ortic valve(HM) and of 1 13 patients with the standard-profile onescu-Shiley bovine pericardial valve(ISM) explanted from mitral position at the time of re-replacement surgery for primary tissue failure at Seoul national University Hospital until 1994, were studied for clinical and pathological features. Their ages at primary implant were 31.9 $\pm$9.2 years In HM and 30.4$\pm$ 12.5 years in ISM. Hemodrnamic dysfunction of the failed mitral bloprostheses were predominantly insufficiency in HM(64.3%) and stenosis in ISM(51.3%)(p<0.001). Pathologic findings of the explanted mitral valves reflected these hemodynamic changes, revealing failure more often from tissue damage(tears and wears) in HM and more often from calcification in ISM(p< 0.001). Explant period(from primary implant to explant) was relatively short in ISM(8.7$\pm$2.6years), compared with the one in HM(10.4 $\pm$2.6 years)(p<0.001). In conclusion, both the Hancock and the lonescu-shiley valves would fail from calcification as well as issue damage. However, while the Hancock porcine valves in mitral position failed more frequently from tissue failure and insufficiency, the standard-profile lonescu-Shiley pericardial valves did from calcification and stenosis, especially in young pAtients . Although the possibility of less occurrence of valve failure from mechanical reasons may be expected with newer generation bloprostheses, it does not seem to Improve durability significantly unless further refinement in antimineralization is achieved. Therefore, clinical use of the glutaraldehyde-treated bioprosthetic valves is, at present, limited to the patients of advanced age groups.