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Study on analysis of initial Data on 6 Sigma application in real fields (6 Sigma 현장적용 적용 시 초기 데이터 분석에 대한 고찰)

  • Lee, Sang-Bok;Choe, Eun-Hyang
    • Proceedings of the Korean Society for Quality Management Conference
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    • 2009.10a
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    • pp.33-39
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    • 2009
  • 본 연구에서는 현장에서 6 시그마를 활용 시 통계분석의 기초가 되는 초기 데이터 분석에 대한 고찰이다. 통계의 가장 기본이 되는 데이터가 잘못되었으면 나머지 모두 문제가 된다. 이에 데이터 초기에 발생할 수 있는 여러 오류의 가능성을 살펴보고 각각에 대해 해결책을 제시하였다. 여기서 활용하는 방법들은 계측기 선정, Gage R&R, Histogram, Box-plot, PDF, Box-Cox 변화 등이다.

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Crush characteristics of the laminated composite box tubes (섬유강화 복합재료 Box Tube의 Crush거동)

  • 강수춘;전완주
    • Journal of the korean Society of Automotive Engineers
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    • v.13 no.5
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    • pp.65-72
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    • 1991
  • This paper presents the results of static crushing test that was conducted to characterize the energy absorption and collapse characteristics of composite box tubes. Fifteen specimens were fabricated with woven fabric prepreg using [0/90] glass/epoxy and were autoclave cured. Quasistatic compression test was performed on them. Collapse mode and energy absorption capacity vary significantly as a function of the thickness and length of a square side of composite box tube.

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Characteristics of Snow Falling Phenomenon in Korea Based on the Records of Old Literatures (고문헌 기록에 나타난 우리나라 강설현상의 특징)

  • 김기원;신만용
    • Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
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    • 2002.11a
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    • pp.89-92
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    • 2002
  • 동일 주제를 대상으로 현시대의 것과 지난 수 백년 전 과거의 것을 서로 비교하는 연구는 차이점을 발견할 수 있으리라는 기대감 하나 때문만이라도 흥미를 갖게 한다. 본 논문은 $\boxDr$국역 조선왕조실록$\boxUl$$\boxDr$국역 고종순종실록$\boxUl$ (서울 시스템간) 및 인터넷을 검색하여 과거 1934년 간의 우리나라 강설현상을 추적하여 그 특징을 정리하여 본 것이다.(중략)

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Box-Cox Transformation for Conditional Heteroscedasticity in Domestic Financial Time Series

  • Hwang, S.Y.;Lee, J.H.
    • Journal of the Korean Data and Information Science Society
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    • v.15 no.2
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    • pp.413-422
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    • 2004
  • Box-Cox power transformation is employed for analyzing volatilities in Korean financial time series such as KOSPI, KOSDAQ index and interest rates. Statistical procedures for Box-Cox transformed ARCH models are presented. For illustration, diverse financial time series data are analyzed and appropriate power transformations are suggested for each data.

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The Study of detailng for concrete reinforcement and Seismic Analysis Method for Underground Reinforced Concrete Box Structures (지하 철근 콘크리트 박스 구조물의 내진해석방법 및 철근 배근 상세에 관한 연구)

  • Lee, Myoung-Soo;Han, Sang-Chel
    • Proceedings of the KSR Conference
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    • 2005.11a
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    • pp.1215-1222
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    • 2005
  • The object of this thesis is an study on detailing for concrete reinforcement and analytical study for seismic behavior of underground reinforced concrete box structures using the established seismic analytical method. Using the established seismic analytical method that has been presented in various documents seismic behavior of buried reinforce concrete box structures is compared. From the comparsion, it is shown that feasibility and detailing detailng for concrete reinforcement and seismic method for seismic analysis of buried reinforced concrete box structures.

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Plant Factory - A Prospective Urban Agriculture (식물공장 - 미래의 도시농업)

  • 손정익
    • Journal of Bio-Environment Control
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    • v.2 no.1
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    • pp.69-76
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    • 1993
  • 최근 작물의 공장적 재배는 $\boxDr$식물공장$\boxUl$이라는 단어로 대표되는, 새로운 재배방식의 하나로서 세계적으로 주목받고 있다. 식물공장(plant factory or factory- style plant production system)이라는 단어의 의미와 같이 $\boxDr$시설내의 작물을 공장제품의 생산과 동일하게 재배하는 시스템$\boxUl$이다. 즉 자연환경에 의존하지 않고 인공환경하에서 식물을 공장적으로 재배하는 방식을 의미한다. 이를 위해서는 지하부의 양액, 지상부의 온습도, 탄산가스, 광 등에 대한 고도의 환경제어 및 작업의 자동화가 필요하다.(중략)

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Some Properties on Existence of a Complete Function (완비함수의 존재성에 관한 몇가지 성질)

  • 이민섭
    • Journal of the Korea Institute of Information Security & Cryptology
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    • v.8 no.2
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    • pp.3-12
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    • 1998
  • 블럭암호의 비도는 S-box의 비도와 운영방식에 의존된다. S-box 의 비도는 이 한수의 성분함수인 Book함수의 비선형성, 상관면역위수, SAS, 균형성 등에 의존되며, S-box자체의 비선형성, 입력성부(또는 입력비트)에 대한 출력성분(또는 출력비트)의 독립성 등에 의존된다. 이와 같은 출력 성분의 독립성에 관한 개념의 하나가 완비성이다. 본 논문에서는 Galois 체 GF(2)위해 n차원 벡터공간 GF(2)$^{n}$ 에서 완비함수의 존재성에 관한 몇 가지 알고리즘과 완비함수가 만족하는 성질들을 조사하였다.

A Case Study on the Preservation Treatment of Ancient Documents -Focusing on the "Keumganggyung-samgahae" from the Four Devas of Borimsa, Buddhist Temple at Jangheung County- (고문헌의 보존처리에 관한 사례연구 -장흥 보림사 사천왕상에서 발견된 『금강경삼가해』를 중심으로 -)

  • Roh Ki-Chun
    • Journal of Korean Library and Information Science Society
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    • v.35 no.3
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    • pp.79-94
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    • 2004
  • This research studied the preservation treatment of the papered literature the national treasure 745-9 $\ulcorner$Keumganggyung-samgahae$\lrcorner$, discovered in 1995 from the Four Devas of Borimsa Buddhist Temple at Jangheung County, in the viewpoint of the bibliography. The overall features of the $\ulcorner$Keumganggyung-samgahae$\lrcorner$ were of 25.3cm width, 38.9cm height 1.5cm depth, 58 pages and of high-fine yellow-brown colored reef paper. The book was ruined physically in the shape and color. The covers of the book were deeply stained by the permeated rain and some internal pages were changing into brown color by corrosion. The treatment policies were; maintaining the status quo and capable repeated treatment. And the preservation treatment was done in the sequences of 1) 1st cleaning process, 2) repairing and correcting, 3) 2nd cleaning and preservation 4) cutting, binding the book and making the envelope and wood box. The post-preservation features of $\ulcorner$Keumganggyung-samgahae$\lrcorner$ were; total 64 pages and the size being 25.8 cm width 39.4cm of lenght, and 1.9cm of depth.

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Prestressing Inducing Effect of Continuous Open-top Steel Box Girder Using Modular CFT Members (모듈형 CFT부재를 이용한 개구제형 연속 강박스 거더의 프리스트레싱 도입 효과)

  • Lee, Hak Joon;Kim, Ryeon-Hak;Cho, Kwang-Il;Ahn, Jin-Hee
    • Journal of the Korea institute for structural maintenance and inspection
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    • v.26 no.3
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    • pp.111-119
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    • 2022
  • The increasing sectional stiffness and inducing prestress method of continuous steel box girder using modular CFT members use the restoring force of the CFT module generated from removing the prestressing bars in the CFT module after integrating the prestressed CFT module with the lower steel plate of the steel box girders as a prestressing force. The integrated CFT module in the steel box girder can improve the sectional stiffness of the continuous steel box girder section. To examine the applicability of the introduction of prestressing to the integrated steel box girder using the CFT module, in this study, inducing prestressing tests were conducted using CFT modules for steel plate specimens simulating the lower steel plate of the continuous steel box girder, and FE analyses were conducted for inducing prestressing tests. In addition, to confirm the effect of inducing prestress to the actual steel box girder and increasing sectional stiffness by the CFT modules, FE analyses for the actually applicable continuous steel box section were carried out depending on prestressing force and sectional conditions of the CFT modules, FE analysis results were compared.