• 제목/요약/키워드: Chang Bong Young

검색결과 571건 처리시간 0.029초

SAFETY EVALUATION OF SUNSCREENS (I) ; CORRELATION BETWEEN SUN PROTECTION FACTOR AND SKIN IRRITATION

  • Suh, Soo-Kyung;Kim, Jong-Won;Park, Ju-Young;Seo, Kyung-Won;Park, Chang-Won;Kim, Kyu-Bong;Kim, Kwang-Jin;Kim, Jong-Min;Lee, Sun-Hee
    • 한국독성학회:학술대회논문집
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    • 한국독성학회 2002년도 Current Trends in Toxicological Sciences
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    • pp.138-138
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    • 2002
  • In recent years, the safety of sunscreens has been challenged based on the reports of its adverse effect on users; dermatitis, allergic contact dermatitis, photoallergic contact dermatitis. To investigate a correlation between sun protection factor (SPF) and the safety of sunscreens, we measured in vitro SPF index using homosalate as a standard and examined the toxicity tests on cosmetics; primary and cumulative skin irritation tests, ocular irritation test, and skin sensitization test.(omitted)

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Seed-borne Brachycladium penicillatum Intercepted under Plant Quarantine Inspection in Korea

  • Hyun, Ik-Hwa;Chang, Seo-Yeon;Lee, Moon-Young;Kim, Min-Kyung;Choi, Woo-Bong
    • Mycobiology
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    • 제40권3호
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    • pp.205-207
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    • 2012
  • A fungus detected from the importing seeds of Papaver rhoeas under plant quarantine inspection in Korea was identified as Brachycladium penicillatum Corda. It differed in morphological characteristics from a similar species, B. papaveris, which was known to form no macroconidiophores and no microsclerotia. Since the first interception in 2006, this fungus has frequently been found from importing seeds of Papaver spp. It was detected from 31 out of 282 seed consignments imported from 2006 to 2011. To prevent its introduction to Korea, the seed consignments infested by B. penicillatum were destroyed or reshipped.

섬유근통(fibromyalgia)의 병태와 진단을 위한 임상 1례 보고 (A Case Report of Symptomatic Character and Diagnosis of Fibromyalgia)

  • 정태영;조정효;박봉기;손창규
    • 대한한의학회지
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    • 제30권4호
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    • pp.162-168
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    • 2009
  • Objective: This report aimed to study fibromyalgia's diagnostic criteria, differential diagnoses and its pathology from the viewpoint of oriental medicine. Method: We observed and diagnosed a female patient who complained of prolonged whole body pain, even several times hospitalized for treatment. Result: The patient's symptoms correspond with fibromyalgia and we ruled out other suspected diseases. Conclusion: Fibromyalgia is prone to be misdiagnosed because the patient has complicated symptoms such as various pains and chronic fatigue as well as depression unexplained by medical tests. Furthermore, the symptoms often never disappear completely, although it isn't progressive or life-threatening, and can be improved. So accumulation of data and analysis from the viewpoint of oriental medicine is necessary for development of oriental medical standard treatment.

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광펄스 파라미터 가변 LD를 이용한 복합형 DPSSL 개발 (Development of a Hybrid DPSSL with a Pulse Parameter Variable LD Seed)

  • 노영철;신우진;유봉안;이영락;정창수
    • 한국정밀공학회지
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    • 제27권10호
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    • pp.7-13
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    • 2010
  • We report a hybrid DPSSL with a pulse parameter variable LD seed, all-fiberized polarization-maintained pulsed Yb-doped fiber preamplifier chains, and a bulk Nd:$YVO_4$ power amplifier. Pulse parameter of LD seed was controlled by direct current modulation. The hybrid DPSSL generates 1064 nm laser pulses with an average power of 40W, a pulse duration of 20-40ns, and a repetition rate of 100-500kHz.

얼굴 인식을 위한 개선된 $(2D)^2$ DLDA 알고리즘 (Improved $(2D)^2$ DLDA for Face Recognition)

  • 조동욱;장언동;김영길;김관동;안재형;김봉현;이세환
    • 한국통신학회논문지
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    • 제31권10C호
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    • pp.942-947
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    • 2006
  • In this paper, a new feature representation technique called Improved 2-directional 2-dimensional direct linear discriminant analysis (Improved $(2D)^2$ DLDA) is proposed. In the case of face recognition, thesmall sample size problem and need for many coefficients are often encountered. In order to solve these problems, the proposed method uses the direct LDA and 2-directional image scatter matrix. Moreover the selection method of feature vector and the method of similarity measure are proposed. The ORL face database is used to evaluate the performance of the proposed method. The experimental results show that the proposed method obtains better recognition rate and requires lesser memory than the direct LDA.

Productivity of Small Pelagics in Korean Waters

  • Zhang, Chang-Ik;Lee, Jae-Bong;Seo, Young-Il;Lee, Sung-Il;Lee, Man-Woo;Lee, Sun-Kil;Yoon, Sang-Chul;Park, Kyum-Jun;Yeong Gong
    • 한국어업기술학회:학술대회논문집
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    • 한국어업기술학회 2002년도 추계 수산관련학회 공동학술대회발표요지집
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    • pp.270-272
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    • 2002
  • Competitive species have the same spatial distribution (habitat) and foraging behavior (niche), while non-competitive species have either different feeding behavior or spatial distribution. Therefore, ecological segregation among species of fish results rfom differences in foraging behavior and spatial distribution (Allen, 1984; Zhang 1988). To explore these ecological strategies among major small fish pelagics in Korean waters, distribution of CPUE in the Korean large purse seine fishery were examined. (omitted)

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체적함수비 및 주파수에 따른 풍화토의 전기비저항 특성 (Characteristic of electrical resistivity against volumetric water content and frequency in weathered soil)

  • 손영환;봉태호;장병욱
    • 한국농공학회논문집
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    • 제50권5호
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    • pp.63-72
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    • 2008
  • This study was conducted to define a characteristics of Electrical Resistivity of weathered soil against volumetric water content and frequency. It is essential to analyze and understand a characteristics of the Electrical Resistivity for evaluation of soil as subsurface contaminant detection. Before the test, an effect of pore water and ion were checked using four liquids(distilled water, tap water, potassium chloride 1.8mM, and 3.7mM). As a result, the correlation between the volumetric water content and the Electrical Resistivity was estimated. The Electrical Resistivity decreases with increasing frequency and water content. Also, Electrical Resistivity could be described by an exponential function of volumetric water content with the constants.

반발경도법에 의한 고강도콘크리트의 재령별 압축강도 평가 (A Study on the Compressive Strength Estimation of High Strength Concrete by Rebound Method Classified by Ages)

  • 이용재;신준관;백철;이충봉;곽창훈;손영현
    • 한국산업안전학회:학술대회논문집
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    • 한국안전학회 1998년도 추계 학술논문발표회 논문집
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    • pp.159-164
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    • 1998
  • 포틀랜트 시멘트가 개발되어 콘크리트에 응용됨으로서 콘크리트의 적용범위가 무한히 확대되고 있는 상황에서, 최근, 구조물이 고층화, 대형화, 특수화됨에 따라 건설재료인 콘크리트의 고품질화가 요구되고 있다. 이러한 고품질화의 최우선과제로 콘크리트의 고강도화에 관한 많은 연구가 국내외에서 이루어지고 있고, 실제 시공된 사례도 급속히 증가하고 있다. (중략)

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Current-voltage Characteristics of Water-adsorbed Imogolite Film

  • Park, Jae-Hong;Lee, Jung-Woo;Chang, Sun-Young;Park, Tae-Hee;Han, Bong-Woo;Han, Jin-Wook;Yi, Whi-Kun
    • Bulletin of the Korean Chemical Society
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    • 제29권5호
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    • pp.1048-1050
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    • 2008
  • Electric current flow was observed through imogolite film when imogolite ($(HO)_3Al_2O_3SiOH$) was exposed to water molecules and connected to external electrodes. Current flow was due to the bound water on the surface of imogolite. Current flow increased as the pH of the water decreased. The current-voltage (I-V) measurements from a field effective transistor (FET) using $H_2O$/imogolite film revealed that the current carrier in $H_2O$/ imogolite had p-type characteristics, i.e. the carrier was probably $H^+$. The possible mechanism for current transportation in imogolite/water was also suggested in this paper.

ISIS 기반의 엔터프라이즈 어플리케이션 개발방법 (Development Methodology of Enterprise Applications based on the ISIS)

  • 조은환;;이민수;장영철;이봉
    • 한국IT서비스학회:학술대회논문집
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    • 한국IT서비스학회 2010년도 춘계학술대회
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    • pp.529-535
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    • 2010
  • 오늘날의 엔터프라이즈 IT 환경은 비즈니스 요구사항이 빠르게 변하면서 기존 시스템들의 민첩한 대응이 어렵고, 비즈니스 프로세스가 점점 복잡해지면서 시스템 개발 및 제어가 힘든 상황이다. 이 때문에 관리비용은 점점 증가하고 시스템의 수명주기가 단축되면서 전체적인 개발생산성이 낮아지고 있다. 최근 이와 같은 소프트웨어 개발문제를 극복하기 위해서 XP(eXtreme Programming)와 SCRUM 같은 애자일(agile) 방법론이 등장하게 되었고, 점차 대규모의 엔터프라이즈 어플리케이션 개발에 적용할 필요성이 대두되고 있다. 따라서 본 논문에서는 엔터프라이즈 어플리케이션의 개발생산성을 향상시키고 수명주기를 연장시키는데 효과적인 ISIS(Integrated System of Independent Sub-systems) 개발방법을 제안하고자 한다.

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