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An Analysis of Hindrance Factors of Process Capability (공정능력(工程能力)의 저해요인분석(沮害要因分析))

  • Song, Seo-Il;Hwang, Ui-Cheol
    • Journal of Korean Institute of Industrial Engineers
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    • v.11 no.2
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    • pp.131-140
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    • 1985
  • This paper analyses the hindrance factors of process capability. The reasons of the products which are out of specification can be accounted on the hindrance factors. An $\hat{e}$nquete which consists of 4 categories such as technical knowledge, work performance, work environment, and human relations at home and office, is prepared and handed out to 1000 works to get information. And Spearman's Correlation Coefficient (${\rho}s$) is adapted as an anaysis and consideration criterion. In consequence, it is revealed the next 4 factors become the vital hindrance factors of process capability: (1) unskillful working (2) over load for operators (3) imperfect work environment (4) incoordination of human relations And the correspondent policy can be summarized as follows: (1) propagation & fixation of I.E. techniques (2) harmonization of human relations (3) improvement of work environment (4) strengthening the T.W.I.

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Axiomatic Approach for Design Appraisement and Development DVD (I) (DVD 설계평가 및 개선을 위한 공리적 접근 (I))

  • Moon, Yong-Rak;Cha, Sung-Woon;Kim, Young-Kyu
    • Journal of the Korean Society for Precision Engineering
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    • v.16 no.5 s.98
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    • pp.124-131
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    • 1999
  • DVD(Digital Versatile Disk) is the data storage media devised to make high storage density and high speed data input/output possible. For example, a whole length movie can be stored in a disk as large as a CD(Compact Disk). Therefore higher rotational speed and better accuracy in optical pick-up are required compared with the existing optical storage device. Without these operational functional requirements being satisfied DVD will lose its place as the high capacity storage device. This paper evaluated whether the currently developed DVD satisfies the requirements and provides improved methods with the Axiomatic Approach which is superb in evaluating and designing newly concepted designs.

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Chemotaxonomy on the Sedum Plants in Korea (한국산(韓國産) sedum속(屬) 식물(植物)의 화학적(化學的) 분류(分類))

  • Ko, Kyeong-Soo;Shin, Kwan-Seok;Kim, Chang-Min
    • Korean Journal of Pharmacognosy
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    • v.14 no.4
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    • pp.131-136
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    • 1983
  • The composition of the phenolic compounds of 14 species, 2 varieties and I taxon of the Sedum plant in Korea were studied to identify their inter-specific relationships and their taxonomical position. The phenograms and contour diagrams obtained from the HPLC of EtOAc soluble fraction of these plants were classified into 7 alliances according to their chemical patterns. These chemical patterns agreed with Satake's classification except for Sedum aizoon. These plants were subdivided into 5 alliances in the Sedum section and 2 alliances in the Hylotelephium section. I type of the Sedum spectabile showed a difference in the number of stamens, it could be trated as another category above variety according to this result.

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OJIP분석을 이용한 식물의 환경스트레스 지표의 검색

  • O Soon Ja;Go Sug Chan
    • Proceedings of the Korea Society of Environmental Biology Conference
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    • 2002.11a
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    • pp.127-131
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    • 2002
  • The OJIP transients were investigated from leaves of Crinum asiaticum var. japonicum, Osmanthus insularis, Chloranthus glaber and Asplenium antiquum, in order to screen the indicators for quantification of environmental stresses and to apply them to the plant vitality test. The obvious diurnal changes or OJIP transients were found in Crinum asiaticum var. japonicum, Osmanthus insularis growing in sunny habitats, showing lower Fp and higher Fo in day time. The values of SF $I_{no}$ and P $I_{NO}$ increased dramatically in day time in leaves of Crinum asiaticum var. japonicum, Osmanthus insularis, and Asplenium antiquum. Although the value of RC/CS decreased slightly in day time in leaves of 4 tropica $l_tropical plants, the obvious diurnal changes or OJIP transients were not seen in winter, suggesting that tropica $l_tropical paints used in this research seemed to be irreversibly damaged in winter. However, the values of ETo/RC and Ψo/(1-Ψo) increased significantly in leaves of Crinum asiaticum var. japonicum, indicating that ETO/RC and Ψo/(1-Ψo) were useful as indicator parameters for scensing of low temperature.ature.

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East Asian five stock market linkages (아시아 주식수익률의 동조화에 대한 연구)

  • Jung, Heon-Yong
    • Management & Information Systems Review
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    • v.27
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    • pp.131-147
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    • 2008
  • The study examines common component existing in five Asian countries from 1991 to 2007. To do this, the daily stock market indices of Korea, Malaysia, Thailand, Indonesia, and the Philippines were used. Using a Vector Autoregressive Model this paper analyzes causal relations and dynamic interactions between five Asian stock markets. The findings in this study indicate that level of five Asian stock markets' stock return linkages are low. First, from the statistics for pair-wise Granger causality tests, I find Granger-causal relationship between Korea and Indonesia and between Malaysia and and Indonesia. Second, from the results of response function and the statistics of variance decomposition, I find that week shocks to Korean stock market return on Malaysia, Indonesia, Thailand, and the Philippines stock market returns. The results indicate increased Asian stock market linkages but the level is very low. This implies that the benefits of diversification within the five Asian stock markets are still existed.

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Three Cases of Atopic Dermatitis (柱枝加黃기湯으로 치료한 소아 아토피 피부염의 한방치험 3례-삼출을 주증상으로 하는 환자를 대상으로)

  • Jung Jin-yiung;Kim Yoon-bum
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.17 no.2
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    • pp.131-139
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    • 2004
  • Background: Infantile atopic dermatitis involves the face, with erythematous weepy patches. This weeping eczema has severe itching and causes eczema secondarily. Also it has a profound effect on the quality of life. Many infantile AD patient and parent suffer troubles because of weeping eczema. Objective: The purpose of this study was to evaluate the efficacy of Gyejigahwanggitang(桂枝加黃?湯) in infantile AD patient with weeping eczema. Method: I treated them with Gyejigahwanggitang(桂枝加黃?湯) for balancing YoungWi(調和榮衛). I also used acupuncture therapy.

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Culture in language: comparing cultures through words in South Africa

  • Montevecchi, Michela
    • Cross-Cultural Studies
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    • v.24
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    • pp.120-131
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    • 2011
  • South Africa is a multiracial country where different cultures and languages coexist. Culture can be conveyed through language. Language conditioning is also social conditioning, and through words we make sense of our own and others' experience. In this paper I investigate the meaning of two culturally significant words: (English) peace and (African) ubuntu. Data findings will show how L2 speakers of English, when asked to define peace, promptly operate a process of transfer of the meaning from their mother-tongue Xhosa equivalent - uxolo - to its English equivalent. Ubuntu, an African word which encompasses traditional African values, has no counterpart in English. I will also argue how, in the ongoing process of globalisation, English is playing a predominant role in promoting cultural homogenization.

Fuelcell GDL used in the high conductance of the carbon fiber surface treatment (연료전지 기체확산층용 고전도성 탄소섬유 표면처리 연구)

  • Baek, Sunghwan;Kim, Taejin;Kim, Jingu;Lee, Yohan
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.131.1-131.1
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    • 2010
  • 고분자연료전지(PEMFC)에서 기체확산층(GDL)은 다공성의 카본 종이/천 위에 마이크로한 다공층을 가치는 구조로 촉매층을 지지하고 촉매층과 분리판 사이의 전류전도체 역할을 한다. 또한 촉매층에 연료와 공기 확산 및 생성된 물의 통로 역할을 하며 소수성인 전기전도성 물질로 이루어져 있다. 현재 연료전지에 쓰이는 가스확산층은 대부분 국외 회사에서 제조 수입 사용하는 현황이고 국내에서는 협진 I&C가 연구하고 있으나 상용화는 아직 이루어지지 않고 있다. 본 연구는 탄소섬유의 전도성을 개선하고자 탄소섬유 표면에 금속코팅 시 최적의 접촉계면유지를 위한 표면처리 방법 및 공정을 조사 분석 후 최적 개선방법(농도/온도/압력/시간)을 설정하고자 하였다. 또한 선정된 공정인자별 수준별 시험 후 샘플링 된 시료를 토대로 금속물질이 탄소섬유 표면에 코팅(도금)된 금속-탄소섬유를 대하여 평가하여 최적화시키고자 탄소섬유로부터 carbon paper GDL의 모재를 개발할 계획이다. 앞에서 설명한 바와 같이 탄소섬유를 이용하여 paper making, resin impregnation, molding, carbonization/graphitization의 제조공정을 거쳐 paper형태의 GDL을 생산 및 평가하고자 하였다.

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Development of a Tractive Performance Prediction Program of Tractors (트랙터의 견인성능 예측 프로그램 개발)

  • Park, Won-Yeop;Lee, Sang-Sik
    • Journal of Biosystems Engineering
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    • v.37 no.3
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    • pp.131-139
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    • 2012
  • In this study, we developed a simulation program for the prediction of tractive performance of a tractor, by applying a widely used empirical model for tractive performance prediction of single tire, Brixius. The tractive performance prediction program can readily predict and estimate tractive performance according to various soil conditions and different specifications of tractors. The program was developed with the considerations of tractor's specification-related parameters (e.g., weight, tire size, and wheelbase of the tractor), a soil parameter (i.e., cone index which represents the soil strength), and operating conditions of the tractor (e.g., theoretical speed and driving types such as 2WD and 4WD). Also, the program was designed to provide tractive performance prediction results of tractors such as gross traction, motion resistance, net traction, and tractive efficiency, in the form of not only numerical values but also graphical visualization. To evaluate the feasibility of the program, we input three different soil conditions (which have different cone indexes each other) and tractor operating conditions to the program and analyzed the tractive performance from each input condition. From the analysis, it can be concluded that the developed program can be effectively utilized to predict the tractive performance under various soil conditions and driving types of tractors with different specifications.