전기체 낙하산 시스템의 장착에 대한 인증 고려사항

김성겸,Kim, Seung-Kyem 항공우주시스템공학회 2016 항공우주시스템공학회지 Vol.10 No.2

Whole airplane recovery parachute system(WARPS) is a auxiliary safety system to protect occupants in emergency situation where recovery to normal flight condition is impossible. In this paper, application and certification cases of WARPS for Part 23 small airplane is introduced and considerations in certification of the WARPS installed airplane are provided in terms of performance of parachute, function and operation, loads and strength and protection of occupants.

Part 23 보통급 비행기와 VLA 비행기의 구조분야 감항기술기준 요건 비교 연구

김성겸,Kim, Seung-Kyem 항공우주시스템공학회 2013 항공우주시스템공학회지 Vol.7 No.2

In 2010, Airworthiness standard for VLA(Very Light Airplane) category was newly introduced as KAS Part VLA. KAS Part VLA is an adaption of EASA CS-VLA which was developed to reduce unnecessary burden of manufacturer of very light, simple, single-reciprocating-engine/propeller powered airplanes having low stall speeds by tailoring some requirements of Part 23. In this paper, difference and similarity of structural requirements between Part 23 and VLA was analyzed.

단위동물에 있어서 칼슘 및 인의 영양에 관한 연구 3 . 사료내의 칼슘 , 인 및 소금 수준간의 상호작용이 브로일러의 골격과 혈액의 조성에 미치는 영향에 대한 연구

김성겸,한인규 ( S . K . Kim,I . K . Han ) 한국축산학회 1982 한국축산학회지 Vol.24 No.3

In order to study the effects of various levels of dietary Ca (0.45, 0.90, and 1.80%), ), P (0.40, 0.70, and 1.40%), and NaCl (0.25 and 1.05%) on the bone and blood compositions of the growing broilers chicks, 3 x 3 x 2 factorial experiments were conducted. Serum Ca, factorial experiments were conducted, Serum Ca, P and Na contents on the day 1, 3, 7, 14 and were examined. 1. Bone ash content was highly significantly affected by the 3 dietary factors (p $lt; 0.001), and was increased as the level of dietary factor increased. Ca x P, P x NaCl, and Ca x P x NaCl interactions on this parameter 28 were highly significant (p $lt; 0.001); that of Na x P was antagonism and that of Ca x NaCl was sparing action. 2. Dietary Ca and P levels showed positive correlationship with bone Ca content (p $lt; 0.005). This was modified by dietary NaCl levels (p $lt; 0.05); with higher NaCl, the highest Ca retention at medium Ca. Ca x NaCl and P x NaC) interactions on this parameter were fashions of sparing action (p $lt; 0.001). 3. Bone P contents was highly significantly (p $lt; 0.001) increased as the dietary NaCl and P levels increased, however, dietary Ca did not influence the bone P content (p $lt; 0.05). But Ca x NaCl interaction was slightly apparent (p $lt; 0.10), and P x NaCl showed significant (p $lt; 0.05) sparing correlationship. 4. Serum Na level was not affected by dietary Ca and P levels, but was slightly (p $lt; 0.10) reduced with higher dietary NaCl by the significant (p $lt;0.05)Ca x NaCl interaction. 5. Serum Ca concentration was not affected by dietary NaCl levels. However, it was increased (p $lt; 0.001) as the dietary Ca level increased or as the dietary P level decreased, 6. Serum P concentration was significantly (p $lt; 0.001) increased as the dietary P level increased or as the dietary Ca level decreased. On this parameter NaCl x Ca effect was of sparing action, although dietary NaCl effect was not significant. In conclusion, it might be suggested that the dietary NaCl levels affect the bone composition, although the effect in the serum is not significant.

소형 비행기 연료 계통 적합성 입증을 위한 비행시험에 관한 고찰

김성겸,Kim, Seungkyem 항공우주시스템공학회 2012 항공우주시스템공학회지 Vol.6 No.3

In this paper, analysis of airworthiness requirements which require flight test to show compliance and flight test method as means of compliance to those requirements are provided. For unusable fuel test, sufficient discussion between certification authority and applicant is required to select test conditions. For hot weather fuel system operation test, preservation and heating of test fuel should be done carefully not to adversely affect to test result.

전자문서 정보패키지 구축 사례 연구 - '공인전자문서보관소 전자문서 정보패키지 기술규격 개발 연구'를 중심으로-

김성겸,Kim, Sung-Kyum 한국기록학회 2007 기록학연구 Vol.0 No.16

업무 과정에서 생산되는 모든 기록들은 대부분 종이 형태로 작성, 관리해 왔다. 그러나 최근에는 전자적 형태의 기록이 종이를 대신하는 추세이다. 전자기록은 종이기록과 달리 생산과 보관의 편리성을 갖고 있어서 업무 효율성 극대화에 기여한다. 그러나 종이기록처럼 원본과 사본의 뚜렷한 구분이 어렵고 전자적 환경에서 외부 영향에 의해 변경, 훼손될 수 있으며 S/W, H/W 환경이 변화할 때 마다 즉각적인 조치를 취함에 있어 어느 경우에는 막대한 인력과 비용이 발생하기도 한다. 그럼에도 불구하고 업무의 편리성과 생산비용의 효율성으로 인해서 현재 업무 환경에서 전자기록 생산이 차지하는 비중은 날로 높아지고 있다. 이에 정부와 민간, 학계에서는 전자적 형태의 기록이 가지고 있는 장점을 극대화하면서 위험을 최소화할 수 있는 방안 마련에 노력하고 있다. 그 방법 중의 하나가 본 글에서 소개하고 있는 공인전자문서 보관소 사업(이하 공전소 사업)이다. 원활한 공전소 사업를 위해서 행정적으로는 전자기록의 법적 효력 보장과 기술적으로는 전자기록의 신뢰성, 진본성 보장을 우선적으로 확보해야 했다. 그래서 공전소 사업 주체인 산업자원부와 한국전자거래진흥원은 2005년 전자거래법 개정을 통해서 전자기록의 법적 효력 보장 규정을 보완하고 2006년에는 공전소 이용자의 요구인 전자기록의 장기보존과 신뢰성 확보를 위한 연구가 진행됐다. 이러한 공전소의 목적 달성을 위해 공전소 전자문서 정보패키지 연구에서는 디지털 형태의 장기보존을 위한 표준인 ISO 14721 정보패키지 모델을 적용하여, 전자기록이 생산 시점의 SIP, 보관 시점의 AIP, 이용자 활용 시점의 DIP 메타데이터 기능을 마련하고 이들이 공전소 정책에 따라 구현될 수 있도록 정보패키지를 생성, 관리하는 프로세스를 제시하고 있다. 이에 본 글에서는 그동안 진행되었던 연구 내용을 바탕으로 공전소 전자문서 정보패키지의 생성, 진행 과정과 적용 방법, 패키지 간의 흐름도를 소개하고 이를 바탕으로 기록관리 영역에서 지속적으로 연구해야 할 이슈에 대해 제시하고자 한다. Those days when people used paper to make up and manage all kinds of documents in the process of their jobs are gone now. Today electronic types of documents have replaced paper. Unlike paper documents, electronic ones contribute to the maximum job efficiency with their convenience in production and storage. But they too have some disadvantages; it's difficult to distinguish originals and copies like paper documents; it's not easy to examine if there is a change or damage to the documents; they are also prone to alteration and damage by the external influences in the electronic environment; and electronic documents require enormous amounts of workforce and costs for immediate measures to be taken according to the changes to the S/W and H/W environment. Despite all those weaknesses, however, electronic documents increasingly account for more percentage in the current job environment thanks to their job convenience and efficiency of production costs. Both the government and private sector have made efforts to come up with plans to maximize their advantages and minimize their risks at the same time. One of the methods is the Authorized Retention Center which is described in the study. There are a couple of prerequisites for its smooth operation; they should guarantee the legal validity of electronic documents in the administrative aspects and first secure the reliability and authenticity of electronic documents in the technological aspects. Responding to those needs, the Ministry of Commerce, Industry and Energy and the Korea Institute for Electronic Commerce, which were the two main bodies to drive the Authorized Retention Center project, revised the Electronic Commerce Act and supplemented the provisions to guarantee the legal validity of electronic documents in 2005 and conducted researches on the ways to preserve electronic documents for a long term and secure their reliability, which had been demanded by the users of the center, in 2006. In an attempt to fulfill those goals of the Authorized Retention Center, this study researched technical standard for electronic record information package of the center and applied the ISO 14721 information package model that's the standard for the long-term preservation of digital data. It also suggested a process to produce and manage information package so that there would be the SIP, AIP and DIP metadata features for the production, preservation, and utilization by users points of electronic documents and they could be implemented according to the center's policies. Based on the previous study, the study introduced the flow charts among the production and progress process, application methods and packages of technical standard for electronic record information package at the center and suggested some issues that should be consistently researched in the field of records management based on the results.

단위동물에 있어서 칼슘 및 인의 영양에 관한 연구 2 . 브로일러의 성장에 미치는 칼슘 , 인 및 소금의 상호작용에 대한 연구

김성겸,한인규 ( S . K . Kim,I . K . Han ) 한국축산학회 1982 한국축산학회지 Vol.24 No.3

In order to examine the interactions of dietary calicium, phosphorus and salt levels, 972 chicks of meat-breed (Hibro-Hisex) were fed 18 kinds of diet formulated to contain the various level of dietary calcium (0.45, 0.90, 1.80%), phosphorus (0.40, 0.70, 1.40%) and salt (0.25, 1.05%) according to 3 x 3 x 2 factorial design. The results of the present study were summarized as follow. 1. Body weight gain was significantly affected by dietary calcium (p$lt;0.025) and phosphorus (p$lt;0.001) levels, but was not affected by dietary salt levels. Dietary calcium levels x phosphorus levels showed significant p$lt;0.05) antagonistic interaction on the body weight gain. Dietary calcium levels x salt levels interaction was not found to be significant, but showed the trend for antagonism. 2. Feed intake was significantly influenced by dietary calcium (p$lt;0.01) and phosphorus (p$lt;0.01) levels, however, was not altered by dietary salt levels. Dietary calcium levels x salt levels failed to show significant interaction on this parameter, but the trend was of sparing manner. Dietary salt levels x phosphorus levels showed significant (p$lt;0.05) antagonistic interaction in this parameter. 3. Feed efficiency was significantly affected by only dietary calcium levels (p$lt;0.001). Dietary salt levels x phosphorus levels and dietary salt levels x calcium levels showed the trends of sparing manner and antagonism, respectively, in this parameter although the relationships were not found to be significant. 4. Mortality was significantly affected by dietary calcium levels (p$lt;0.05) and phosphorus levels (p$lt;0.01), contrary to dietary salt levels. And the results produced by different calcium levels x phosphorus levels were slightly affected by dietary salt levels. From the results summarized as above, it could be inferred that dietary salt levels affected calcium and phosphorus nutrition, and that antagonism and sparing interaction were involved in the effects of dietary phosphorus levels x salt levels and dietary calcium levels x salt levels, respectively, on the performance of meat-type chicks.

항공기 연료탱크 폭발 방지를 위한 설계 방안 연구

김성겸,Kim, Seung-kyem 항공우주시스템공학회 2012 항공우주시스템공학회지 Vol.6 No.1

Fuel tank design requires special care because tank explosion can cause catastrophic event with high possibility as shown in accident of TWA 800. In this study, cause of fuel tank explosion was reviewed and several design considerations to minimize explosion possibility were introduced.

삼축압축시험을 이용한 아스팔트 혼합물의 파괴기준 개발

김성겸,이관호,Kim, Seong Kyum,Lee, Kwan Ho 대한토목학회 2014 대한토목학회논문집 Vol.34 No.3

일반적으로 Mohr-Coulomb 파괴 이론을 바탕으로 한 재료 파괴는 최대수직응력이나 최대전단응력 상태에서 파괴가 일어나는 것이 아니라 수직응력과 전단응력의 임계결합상태에서 파괴된다. 이에 본 연구에서는 배수성 아스팔트 혼합물 2종과 SMA 10mm혼합물 및 일반 밀입도 아스팔트 19mm를 이용한 $45^{\circ}C$와 $60^{\circ}C$에서 삼축압축시험을 실시하였다. Mohr-Coulomb의 파괴 이론을 바탕으로 삼축압축시험 결과를 정리한 결과 내부마찰각은 $38.9^{\circ}{\sim}46.9^{\circ}$로 다소 불규칙하게 측정되었으나 점착력의 경우 온도와 시편의 수침여부에 따라 다르게 나타났다. 또한, 아스팔트 혼합물의 간접인장강도시험과 삼축압축시험 상관관계를 알아보기 위해 삼축압축시험 결과로 평가된 점착력과 내부마찰각을 이용하여 계산된 이론적인 간접인장강도와 시험을 통해 직접 측정된 간접인장강도를 분석하였다. 두 간접인장강도 값은 비례하는 경향을 보였다. In general, Fracture of the material is not occurring of the maximum normal stress or the maximum shear stress failure in the state. Maximum normal stress and maximum shear stress in the state of Critical coupling from being destroyed based on the Mohr-Coulomb theory. Couple of different mixtures, including permeable asphalt pavement, SMA and dense-graded asphalt mixture, were used for compression triaxial test at $45^{\circ}C$ and $60^{\circ}C$. Mohr-Coulomb theory to the analysis of compression triaxial test result of the internal friction angle $38.9^{\circ}{\sim}46.9^{\circ}$ measured somewhat irregularly, but in the case of cohesion, depending on whether the temperature and immersion of the specimen appeared differently. In addition, Indirect tensile test and compression triaxial test of the asphalt mixture to determine the correlation between compression triaxial test results assessed as cohesion and internal friction angle calculated using the theoretical Indirect tensile strength and measured indirectly tensile strength were analyzed. The Measured & Predicted IDT St values tended to be proportional.

Improvement of Runner Plant Production by Increasing Photosynthetic Photon Flux during Strawberry Transplant Propagation in a Closed Transplant Production System

김성겸,정미선,박선우,김무정,나해영,전창후,Kim, Sung-Kyeom,Jeong, Mi-Seon,Park, Seon-Woo,Kim, Moo-Jung,Na, Hae-Young,Chun, Chang-Hoo Korean Society of Horticultural Science 2010 원예과학기술지 Vol.28 No.4

국내 육성 품종인 '매향' 딸기의 육묘 기간 중 광합성유효광량자속의 환경 조절을 통하여 러너 및 러너플랜트의 발생과 생산 효율을 증대시키고자 하였다. 딸기 육묘에 이용된 증식체의 엽수와 관부 직경은 각각 $3.1{\pm}0.4$와 $7.0{\pm}1.1mm$였다. 광합성유효광량자속을 각각 140, 210 및 $280{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$로 설정한 9기의 인공광 이용형 육묘 모듈에서 35일 동안 육묘하였다. 러너플랜트 생산 효율은 증식체당 일일 0.27주로 처리구 중 유의하게 가장 높았으며 관행의 딸기 육묘 방식의 러너플랜트 생산 효율과 비교하여도 크게 증진되었음을 확인하였다. 폐쇄형 육묘 시스템을 활용하여 육묘 기간 중의 PPF를 $280{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$로 조절하면 국내 육성 품종인 '매향'의 러너 발생 및 러너플랜트 생산을 증진시킬 수 있음이 확인되었다. 따라서 최근 국내에서 육성된 신품종 딸기의 급속 보급을 위한 증식체계 구축에 본 연구 기술이 활용되면 육성된 품종의 조급 보급이 가능할 것으로 판단된다. The formation and elongation of runners, growth of runner plants, and transplant propagation rates of 'Maehyang' strawberry were investigated at various photosynthetic photon flux (PPF) levels. Strawberry plants having $3.1{\pm}0.4$ leaves and $7.0{\pm}1.1mm$ of crown diameter were used as propagules and were cultured for 35 days in 9 transplant production modules using fluorescent lamps as artificial lighting sources. Applied PPF levels were $137.4{\pm}2.1$, $217.0{\pm}1.0$, and $274.7{\pm}8.4{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ as measured on the surfaces of empty shelves. The numbers of runners and runner plants per propagule were the greatest at $280{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$ PPF. The runner plant propagation rate was 0.27 plant/day/propagule at $280{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, which was significantly greater than that of conventional propagation methods. Results indicate that high PPF levels promotes the formation of runners and runner plants of strawberry and that the rapid propagation method with high PPF levels can be feasible for production of vigorous transplants in a closed transplant production system.

고성능 콘크리트 개발을 위한 LCD 폐유리 미분말 활용

김성겸,장일영,Kim, Seong-Kyum,Jang, Il-Young 한국건설순환자원학회 2018 한국건설순환자원학회지 Vol.13 No.1