섬유 및 혼화제를 이용한 황토 모르타르의 수축균열 제어

문주현(Mun Ju-Hyun),양근혁(Yang Keun-Hyeok),전중규(Jeon Joong-Kyu),황혜주(Hwang Hye-Zoo) 대한건축학회 2012 大韓建築學會論文集 : 構造系 Vol.28 No.8

A total of 8 hwang-toh mortar mixes with no cement were tested to evaluate the effect of different fibers and admixtures on the control of shrinkage cracks of such mortars. The fiber types added were Lyocell, Poly-Amid and PVA, while, CSA and organic polymer were selected as the admixture. The shrinkage crack resistance of hwang-toh mortar were examined from the unrestrained drying shrinkage strain, restrained drying shrinkage and plastic shrinkage. Test results revealed that the unrestrained drying shrinkage strain of hwang-toh mortar sharply increased at an early age showing approximately 2.5 times higher values than predictions obtained from ACI 209, regardless of the addition of fibers and admixtures. In addition, cracks owing to the restrained drying shrinkage developed at the only age of 1.6 days in all test mixes; as a result, the cracking grade of hwang-toh mortar was evaluated to be high. On the other hand, the addition of fibers required a value of fiber spacing above 0.0003 in order to enhance the tensile resistance capacity of hwang-toh mortar under the restrained drying shrinkage and reduce the cracking area under the plastic shrinkage. Overall, it could be concluded that moist curing at an early age and the addition of fiber with fiber spacing above 0.0003 are practically effective in reducing shrinkage crack of hwang-toh mortar.

현상학적 신체관념의 고찰

황철문,우현주 釜山大學校 附設 體育科學硏究所 1993 體育科學硏究所 論文集 Vol.9 No.-

This thesis of to establish the general idea of body movement as an objective which furnishes the basis of the science of physical education and dance. To understand the physical being and body activity, phenomenologists have examined the physical being and body activity and have clarified this newly existent field which surpasses the duality of the human body. In traditional philosophy, it has been thought in pure ego that the subject of sensation without the body can be exist. Also, absolute knowledge can be obtained when the mind transcends the body, with the thought body considered lower level than the mind. Challenging this notion of physical being and bringing out new physical being in to the science of physical education and dance was phenomenologists' theory. Phenomenologists have in common when examined the following: 1. Body and mind not independently separated, but both are organically associated and together form the mind-body as a unified entity. 2. Body is understood as a middle agent to consciousness and the surrounding world. "I" exists in the world and with the world and can experience selfness, but the chief object of experiencing "I" is body. 3. Body, which is the center of all the orientation plays the fundamental role of knowledge. The perspective of the surrounding world is centered down to "I" and the body that senses the surrounding world is the most important basis for understanding. 4. Body can not be materially understood, but body is worthy when it exists as a specific living body.

오매(Fructus Mume)의 항산화물질의 분리 및 특성연구

황현주,안은미,백남인,조재선,김해영 경희대학교 생명자원과학연구원 1998 硏究論文集 Vol.19 No.-

천연물로부터 새로운 항산화제를 개발하기 위한 연구의 일환으로 한방에서 사용되는 한약재 중의 하나인 오매(烏梅)의 물 추출물과 메탄을 추출물 및 순차 분획물에 대해 팜유, 우지와 돈지를 기질로하여 유지저아시험, Rancumat method, 전자공여작용 등으로 항산화성을 확인한 결과, EtOAc 분획물에서 강한 항산화 활성을 나타내어 column chromatography, thin layer chromatography를 통하여 활성성분에 관한 연구를 시도하였다. 1. 오매 용매분획물 중 EtOAc 분획물(400 ppm)은 유지저장실험(60℃)에서, 팜유, 우지와 돈지에 모두 우수한 효과를 나타내었으며, 특히 우지에서 높은 활성을 나타내었고, BHA(200 ppm)와 α-tocopherol(200 ppm)보다 활성이 높았다. 2. 오매 EtOAc 분획물(400 ppm)은 Rancimat method에서는 팜유, 우지와 돈지에 비교적 우수한 효과를 나타내었으며, 우지에서 AI가 4.39로 상당히 높은 활성을 나타내었다. 3. 오매의 용매분획물 중 EtOAc 분획물이 DPPH라디칼에 대한 강한 소거활성을 나타내었으며, 그 활성은 EtOAc 분획물의 농도에 의존하여 증가하였고, SC_(50)은 21.2μg/ml이었다. 4. 오매 EtOAc 분획물에서 분리한 8개 획분 중 E4에서 SC_(50)이 16.7μg/ml으로 높은 DPPH 라디칼 소거활성을 나타내었으며, 원인 물질은 여러 가지 스펙트럼 측정 결과 수종 물질이 혼합물인 것으로 밝혀져, 보다 순수한 형태로의 분리 후 정확한 동정의 시도가 요구되었다. Fructus Mume is the roasted hits of Prunus mwme and has been used as tradibonal Chmese medicine. The anboxidatwe effect of the extract from Fructus Mume was measured using different methodsn such as, electron donating abdihes(EDA), Rancimat and oven tests. The methanol extract obtained from the Fructus Mume was solvent-fractionated with ethyl acetate, n-butanol and water, respectively. The ethyl acetate fraction showed the highest antioxidative activity among them. To identify the compounds with antioxidative activity, the isolates from thm layer chromatography were studied further. This study demonstrates that Fructus Mume might be useful for the prevention or treatment of disorders associated with oxidative damage.

우수한 영어교사에 대한 교사와 학생간 인식 비교 연구

황해진,김현주 새한영어영문학회 2009 새한영어영문학 Vol.51 No.2

This study examines teachers' and students' perceptions on the quality of good secondary English teachers in Korea and provides suggestions for the standard of what makes a good English teacher. Through the questionnaire, the researchers collected data from 115 English teachers and 367 students at middle and high schools. The questionnaire consisted of 39 items asking what quality English teachers need in terms of language instruction (English ability, teaching skills, and interactive skills), personality, and assessment. Teachers and students showed significantly different perceptions of English teacher's quality depending on their current teaching/learning levels. Based on the results of the current study, the researchers suggest that more empirical studies like this current one are needed to develop valid standards of a good secondary English teacher's quality in the future and to apply them into teacher selection and teacher training.

Thiamine결핍 유도후 쥐 전뇌의 성상교세포 Glial Fibrillary Acidic Protein(GFAP) 면역화학 활성도에 대한 변화

김승현,김희태,김주한,김명호,황세진,김명권,백태경 대한신경과학회 1999 대한신경과학회지 Vol.17 No.1

영아보육교사의 전문성 인식과 역할수행에 관한 연구

황경애,김현주 진주산업대학교 2005 論文集 Vol.44 No.-

The purpose of this study is to find out the degree of the Educare Center Teachers' recognition of their role as professionals and to what degree this recognition influences their actual role performance. The subjects of this study were 126 infant nursing teachers located in Jinju. The data was analyzed by t-test and ANOVA in SPSS program. The results are as follows : 1) First, professional recognition degree of infant nursing teachers appeared to be over average in overall. The result from examining professional recognition in terms of circumstance factors of the infant nursing teachers indicated significant differences depending on experiences, education in overall, where as indicated no difference depending on age, major, facility type, working hours and payment. 2) Second, In the realm of role performance, age and experience were a signigicant factor. 3) Third, as a rule, it was shown that there was intimate correlation between the recognition and the performance.

섬모상 담체에 부착/ 생장하는 질산화 미생물의 Fluorescence in situ Hybridization에 의한 동정

황선진,장주희,장현섭 대한상하수도학회 2003 상하수도학회지 Vol.17 No.6

FISH (Fluorescence in situ Hybridization) technique was applied to the several nitrifiers in the bulk solution and on the Cilium media to promote nitrification process. It was confirmed by the results of Nso190 and NEU image analysis that ammonia oxidizer forms 'cluster' when they appears in both bulk and media. Another significant fact was that lots of microbial flocs were observed on the surface of the Cilium media substratum instead of biofilm. And from the results of NEU, it was known that Nitrosomonas europaea, Nitrosomonas eutopha and Nitrococcus mobilis or one or two of these three were the dominant ammonia oxidizers. The fact that no Nitrobacter sp. was detected with NIT3 probe means naturally that nitrite oxidizer in the nitrification reactor was not composed of Nitrobacter sp. but with other nitrite oxidizers like Nitrospira sp. etc. In order to detect these nitrite oxidizers, suitable probes must be tested.

전문가 시스템에서 지식의 그룹화와 추론 메타니즘

강현석,황용주,김용화 전북대학교 전자산업개발연구소 1990 전자산업연구 Vol.1 No.-

Most expert systems infer typically by using knowledges i.e.. rules and facts. If we grouped knowledges of the expert system effectively, it is very easy to maintain them. And we also can infer new knowledges from them efficiently because the inference is done only on a set of the finite grouped knowledges. In this paper, we propose a method in which some common attributed knowledges or some related knowledges are grouping efficiently. To show in we describe and algorithm which groups the rules of the expert system. and also we present a method which infers new knowledges by using the grouped knowledges.

불안정 대퇴골 전자간 골절 치료에서MHS (Intramedullary Hip Screw)와 압박고 나사의 비교

정필현,황정수,강석,김종필,곽주영 대한고관절학회 2004 Hip and Pelvis Vol.16 No.1

β-naphthol 유도체 합성 및 항종양활성 검토

이주영,류수진,박예진,황순호,이마세,김인종,김동현,김신규 慶熙大學校 1996 論文集 Vol.25 No.-

Sythesis of β-naphthol derivatives and their anti-tumor activity were investigated. Binaphthol 1 obtained from β-naphthol by oxidative C-C bond formation(phenoloxydation) was converted into its derivatives. Treatment of 1 with POCl_3 followed by aziridine introduction gave phosphoryl aziridine 3. Also, diaziridine 5 was obtained from 1 by chlorination and successive aziridine introdution. Typical chemical transformation of 1 to obtain ester-type afforded compound 7 and 8. Compound 5 was the most effective derivative of the tested compounds on their anti-tumor activity.