가정과 LT협동학습이 중학생의 학습태도 및 학업성취도에 미치는 효과

황순하,류상희 이화여자대학교 교과교육연구소 2004 교과교육학연구 Vol.8 No.3

본 연구는 LT협동학습이 중학교 가정과 교육에서 보이는 변화를 경험적으로 밝혀 보는 데 목적을 두었다. 이를 위해 다음과 같은 세 가지 연구문제를 가지고 수행하였다. 첫째, Learning Together 협동학습과 전통적 강의식 학습에 따라 중학생들의 학습태도는 어떠한 차이가 있는가? 둘째, Learning Together 협동학습과 전통적 강의식 학습에 따라 중학생들의 가정과 학업성취는 어떠한 차이가 있는가? 셋째,Learning Together 협동학습에 대한 중학생들의 인식은 어떠한가? 본 연구에는 중학교 2학년 4개 학급 남·여 학생 총 144명이 참여 하였다. 그 중 2개 반 72명은 실험집단으로, 2개 반 72명은 통제집단으로 구성하였고, 실험집단에는 협동학습의 LT모형을, 그리고 통제집단에는 전통적인 경쟁학습 방법을 적용하였다. 본 실험연구에서는 사전-사후 검사가 집단 사용되었다. 연구의 결과는 실험처치 후 수립된 사후검사점수를 대상으로 SPSS Win을 사용하여 통계 처리되었다. 본 연구를 통해 얻어진 주요 결과는 다음과 같다. 첫째, 협동학습의 LT모형 집단의 학습태도 사후검사 평균점수가 전통적 강의식 학습 집단에 비해 통계적으로 유의미한 수준에서 높게 나타났다. 둘째, 협동학습의 LT모형 집단의 학업성취 사후검사 평균점수가 경쟁학습 집단에 비해 의미 있게 높은 수준으로 나타났다. 셋째, Learning Together 협동학습을 받은 학생 집단의 협동학습에 대한 인식조사에서는 전통적 강의식 학습에 비해 수업에 적극적으로 참여할 수 있고, 토의하면서 공부하므로 이해가 잘되며, 지루하지 않고 흥미가 있다 등의 좋은 점이 있으나, 참여하는 사람만 참여하고, 수준별 능력차가 있어 서로에게 부담을 주며, 소란하고 분위기가 산만하다 등의 단점이 있었다. 전반적으로 볼 때 본 연구의 결과는 가정과 수업전략으로서 협동학습이 갖는 가능성을 보여주었다. 본 연구를 바탕으로 앞으로의 연구 과제를 제시하면 다음과 같다. 첫째, 중학교 가정과 교실에서 유사한 실험연구가 계속되어 가정과 협동학 습의 교육적 변화를 입증 할 수 있는 연구가 지속되어야 할 것이다. 둘째, 학생의 발달상황, 학생의 학업수준, 교육환경특성 등을 고려한 적합한 협동학습 모형의 검증이 필요하다. 셋째, 좁은 교실과 다인수 학급 등의 우리의 교육 여건에 맞는 협동학습 방안을 위한 포괄적이고 체계적인 연구가 필요하다. The purpose of this study was to investigate experimentally the educational effects of LT cooperative learning on learning attitude and academic achievement in middle school home economics classes. The major results of the study were as follows. First, According to students responses, cooperative learning allows more active participation and interesting. Second, the post-test average score on learning attitude of experimental group(LT cooperative learning group) appeared to be significantly higher than that of control group(traditional learning group). Third, the post-test average score on academic achievement of experimental group appeared to be significantly higher than that of the control group. Therefore, it could be said that cooperative learning has positive effect on promotion of students' learning attitude and academic achievement, and the results of this study support the possibility that cooperative learning has the potential as the alternative strategy for teaching middle school Home Economics Education.

한국학생들의 영어 고모음 발음에 대한 연구

황석봉,이순향,구희산 中央大學校 韓國敎育問題硏究所 1998 韓國敎育問題硏究所論文集 Vol.- No.13

The purpose of this study was to investigate the pronunciation problem on high vowel in English, and to think about the resolution of it. The subjects of this experiment were 10 Korean high school students, and their identifying ability on /i, ι, u,υ/was measured. The result was that subjects could identify tense vowels better than lax vowel. That is, the pronunciation problem of high-vowels appears to be in lax vowel. The resolution was suggested that (a) English teachers and students should know that the difference of tense from lax vowel is in sound quality, not in duration; (b) to identify the high vowels, teachers should use in the classroom the tape that English native speakers record the minimal pair-words including the high vowels.

고등학교 가정교과에 대한 교사와 학생의 인식 및 요구도

황기아,황희순 동아대학교 생활과학연구소 2001 생활과학연구 논문집 Vol.9 No.-

The aims of this study are to present an efficient learning and a new direction of home economics by analysing the perception and the demand of home economics education in high school home economics teachers and students. For this purpose, data were collected from home economics teachers, girl students and boy students that finished of unfinished home economics in high school have given answers to classified questionnaire. The statistics of perception in home economics are given in frequency, percentage, X2 verification and that of demand are given in T-test and ANOVA. The major finding were as follows: Teacher's satisfaction of the 6th home economics curriculum is low and there is a meaningful difference(p<.01) in according to teacher's career because of their unsatisfaction of 6th home economics curriculum in itself, the unpractical educational contents in home economics curriculum in itself, the unpractical educational contents in home economics and the huge learning contents resulted from the decrease of school hours and there is a meaningful difference(p<.05) in according to teacher's career. Teacher's perception of the practical exercises is high and there is a meaningful difference(p<.01) in according to teacher's career. The measure of test standard is also reasonable by teacher's debares. But teachers are difficulty in performing the practical exercise and evaluation because of a lot of students. The difficulty in the practical exercise and running subject is the lack of understanding of educational administer and other subject is the lack of understanding of educational administer and other subject is the lack of understanding of educational administer and other subject teachers and there is a meaningful difference(p<.05) in according to teacher's career. As the students have the traditional perception with stress on the technical side for the education of home economics is useful for their practical life. But the degrees of their thoughts are low and there is a meaningful difference of perception(p<.05) between teacher and student. The perception towards the necessity of home economics education for boy student is high to students and teacher. Especially the perception towards the necessity of home economics education for boy student is high to teachers and girl students. Among boy students, finished boy student's perceptions are higher than unfinished boy students's one. So there is a meaningful difference(p<.001) among the group. In the field demand of home economic, the field demand of children's development is first and the field demand of clothing is the lowest. There is a meaningful difference(p<.05) in the field of food life according to teacher's career. we can find the meaningful difference(p<.01) in the field of housing. In the demand of home economics content, teacher's demand is family health and nutrition, the demand of girl student and finished boy student is pregnancy and birth, demand of unfinished boy student is the form of family and the planning of life.

감초추출물 첨가가 청국장의 품질에 미치는 영향

황성희,정헌식,김순동,윤광섭 동아시아식생활학회 2004 동아시아식생활학회지 Vol.14 No.6

This study was conducted to investigate the effects of Glycyrrluizia uralensis water extract on the quality of Cheonggukjang(fermented soybean paste). Soybeans were soaked for 24 hrs, steamed for 1 hr at 121 , mixed with G. uralensis extract(0, 1, 3 and 5%) and fermented for 54 hrs at 40 after inoculation of Bacillus lichenifomis. The amounts of viscous substance and reducing sugar, and pH of the products were increased when the G. uralensis extract was added. The color of the products was changed to dark yellow by the addition of G. uralensis extract. Ammonia odor and bitter taste decreased as the G. uralensis extract content increased. The products added with 5% of G. uralensis extract showed higher acceptability scores than the others. Results suggest that the water extract of G. uralensis could be used as an additive to improve the quality of Cheonggukjang.

고추 국내외 수집 유전자원의 특성

황희숙,황재문,이우승,김점순,김병수 慶北大學校農業科學技術硏究所 1998 慶北大農學誌 Vol.16 No.-

국내외로부터 수집한 고추 유전자원을 포장에 재배하여 종자를 증식하는 동시에 주요 특성을 조사하였다. 헝가리에서 도입하여 1992년도에 평가한 계통들은 Hungarian Wax 혹은 Bell형으로서 바이러스에 심하게 걸려 우리포장환경에 잘 적응하지 못하였다. 1994년도에 평가한 계통들 중 브라질에서 풋마름병 저항성으로 도입한 KC350과 KC351은 직립성이며 바이러스에 강한 편이어서 매우 유망한 유전자원으로 사료되었다. 중국에서 도입한 KC376는 바이러스에 강한 편이며 대과를 착생하여 유망하게 보였다. 태국에서 도입된 계통들은 안동대에서 특성을 평가기록하였다. Accessions of pepper germplasm were planted in the field and their characteristics were recorded. Lines introduced from Hungary were very susceptible to virus diseases and as a result poor in adaptability in domestic field condition. KC350 and KC351 which were introduced from Brazil were growing errectly and tolerant to both bacterial spot and virus diseases. KC376, an introduction from China, was bearing large fruits with tolerance to virus. Introductions from Thailand were grown and evaluated in Andong Universiy, and major characters of them were recorded.

OCT 플라스미드를 갖는 원유 분해세균에 의한 Octane 분해능

최순영,김창숙,이명혜,황문옥,민경희 숙명여자대학교 자연과학연구소 1991 자연과학논문집 Vol.- No.2

원유 분해세균에 의한 원유 분해능을 조사한 결과, Xanthomonas campestris M12. Xanthomonas sp. M28, Acinetobacter lwoffi G1, and Klebsiella pneumoniae L25, 그리고 Pseudomonas maltophilia N246 등의 순서로 나타났다. Xanthomonas campestris M12, Xanthomonas sp. M28, 그리고 Pseudomonas maltophilia N246 균주 모두 octane 분해시의 온도는 30℃에서 최적이었으며, 최적 pH는 X. campestris M12와 Xanthomonas sp. M28이 7.0∼7.5이었고, P. maltophilia N246이 7.5∼9.0이었다. N246 균주의 최적 NaCl 농도는 3.0∼3.5%이었다. P. maltophilia N246와 X. campestris M12는 모두 플라스미드를 갖고 있음을 확인하였고, N246 균주로부터 플라스미드를 제거하였을 경우 octane 분해능이 소실되었으므로 이 플라스미드 위에 octane 분해 유전자가 있음이 확인되었다. 이 균주의 OCT 플라스미드의 크기는 118kb이었다. 또한, N246 균주는 ampicillin 항생제에 내성을 나타내었다. Xanthomonas campestris M12. Xanthomonas sp. M28. Acinetobacter lwoffi G1, and Klebsiella pneumoniae L25, Pseudomonas maltophilia N246 were screened to increase the ability for crude oil utilization. All of these could utilize hexadecane and octane with the exception of N 246 strain for only octane biodegradation. Thus N246, M12, and M28, strains were specially examined for octane oxidation. Octane biodegradation by three strains showed the optimal conditions at 30C, pH7.0∼9.0 and 0.2∼0.3% octane concentration as a substrate. It was found that P. maltophila N246 and X. campestris M12 had plasmid and the cured plasmid from N246 strain lost octane utilization. Therefore, it was confirmed that certain genes for octane utilization were located on OCT plasmid in N246 strain. The size of OCT plasmid in N246 strain was 118 kb. The N246 strain was resistant to ampicillin.

고도정수처리 공정에서의 천연유기물질 특성변화 및 소독부산물 전구물질의 제거특성 평가

노재순,손희종,박은주,황영도,최동훈,배석문,신판세 慶星大學校 環境問題硏究所 2002 環境硏報 Vol.12 No.1

In this research the movement and apparent molecular weight distribution of hydrophilic/hydrophobic organic matters in advanced water treatment process were investigated using the raw water of Maeri area, located in downstream of Nakdong river, and the variation of the disinfection by-product formation potential was also investigated. In the raw water used in experiments, the content of BDOC (biodegradable dissolved organic carbon) in dissolved organic carbon (DOC) was about 39%, and this value is far above a normal, Pre-ozone treatment showed an increase of 40% in the BDOC content, and this means that biodegradability was remarkably increased by ozone treatment BDOC concentration in BAC treated water was 0.09 mg/L, which means 84% of BDOC removal rate compared with that in post-ozone treated water. The variation of chlorine disinfection by-product formation potential in each process unit of water treatment process was analyzed. TOXFP concentration in raw water was 449 ㎍/L, and the contents of THMFP and HAAFP among TOXFP were 24% and 23%, respectively. The removabilities of these materials BAC process had an order of TOXFP > HAAFP > THMFP. BAC process was less effective for THMFP than others. The distribution of hydrophilic organic matters were evaluated in each treatment process. Hydrophilic and hydrophobic matters in the raw water had a ratio of 50 : 50, and the ozone treatment decreased the content of hydrophobic matters. The BAC treatment made the ratio 85:15. These mean that the removal of hydrophilic matters is more difficult than that of hydrophobic materials in water treatment process. In addition the portions of humic and fulvic acid in hydrophobic matters were analyzed. Fulvic acid a large portion among hydrophobic matters in the raw water, and the portion was 78%. Ozone treatment was more effective on the removal of fulvic acid than humic acid. After BAC treatment, the concentration of residual fulvic acid was high than humic acid. Chlorine disinfection by-product formation for hydrophilic and hydrophobic mattrts was compared in each process unit. in the raw water TOXFP and THMFP formation for hydrophobic matter was higher, and HAAFP was highly formated for hydrophobic matter. After post-ozone or BAC treatment, chlorine disinfection by-product formation has high potential for hydrophobic matters. Comparing humic and fulvic acids, chlorine disinfection by-product formation potential was higher for humic acid than for fulvic acid in all processes. In the comparison of the reactivity with chlorine disinfection by-product per unit DOC, THMFP and DOXFP showed higher reactivity with hydrophobic matter than with hydrophilic matter in all processes, and HAAFP was highly reacitive with hydrophilic matter. Apparent molecular weight distributions of organic matters were investigated in each process step.The content of low molecular weight organic matters less than 1000 Da in DOC was high in all processes except raw water, but molecular weight organic matters more than 1000 da was higher than molecular weight organic matters less than 1000 Da in the formation potential of chlorine disinfection by-product.

후지(厚地) 면직물의 특성에 관한 연구(Ⅰ) : Frazier법에 의한 통기도

변희윤,김덕리,구자길,황백순 부산대학교 1999 生産技術硏究所論文集 Vol.56 No.-

This paper describes the properties and air permeability of heavy cotton fabrics. The physical properties (air permeability and water vapor transmission in fiber assembly) have considerable effects on hygiene and comfort. The studies on air permeability and water vapor transmission were carried out using many types of apparatus. In this study, air permeability, open free area, relative open free area, pore diameter, and water vapor transmission were obtained by computerized Frazier Method. Air permeability of heavy cotton fabrics has correlation with open free area and relative open free area, respectively (r=0.9 over). By controlling the fabric count and yarn diameter, we could predict air permeability. As the ratio of open free area, relative open free area, and air permeability were increased, the value of water vapor transmission resistance was decreased. 본 연구는 후지 면직물의 특성에 관한 첫 번째 연구로 후지 면직물의 통기도에 관해서 조사하였다. 섬유집합체의 통기성과 투습성은 위생성능면과 쾌적성 평가면에서 매우 중요한 인자중의 하나이다. 따라서 섬유집합체의 통기성과 투습성에 관한 연구는 오래 전부터 행해졌으며 여러 가지형의 시험기도 개발되어 왔다. 그중 본 연구에서는 Frazier법으로 측정하여 통기성과 평면기공률, 상대평면기공률, Pore diameter 및 투습저항과의 관계를 조사해본 결과 면 후지직물의 통기성은 평면기공률, 상대평면기공률과 각각 정상관의 관계이고(r=0.9이상), 직물의 밀도와 실의 지름을 제어함으로써 통기성을 예측할 수 있었고 직물의 평면기공률, 상대평면기공률, 공기투과도가 크면 투습저항이 적어졌다.

헛개나무의 부위별 이화학적 및 관능적 품질 특성

박금순,김향희 동아시아식생활학회 2005 동아시아식생활학회지 Vol.15 No.1

This study was conducted in order to promote the utilization of Hovenia dulcis Thunb as food. The physicochemical properties and sensory characteristics of the extracts from the leaf, fruit, stalk and stem were examined. The extract of stem was the brightest in L value (p<0.05), but the lowest in b value (p<0.001). By the sensory evaluation, the external appearance was the best in the extract of stem. The extract of leaf was the darkest in color and that of stem the lightest. The bitter and astringent taste was stronger from the leaf compared with other parts. The extract of fruits stalk of Korean Hovenia dulucis was preferred in most of attributes. The total sugar content was the highest from the fruits stalk. Among free amino acids, aspartic acid, glutamic acid and alanine were rich in order. Potassium contents were the highest among minerals from the fruits stalk, leaf and stem. Ca and Mg followed the next. The results were the same both in Korean and in Chinese tree. Among organic acids, malic acid was the most in the fruits stalk, leaf and stem. It was followed by citric acid. In the test of free sugar, glucose was the most and followed by sucrose and fructose in the fruits stalk. Fructose was contained the most in leaf and stem.

치과병원 진료실 내에서 메티실린 또는 반코마이신 저항성 Staphylococcus aureus의 검출

민정희,박순낭,황호길,민정범,김화숙,국중기 대한치과보존학회 2007 Restorative Dentistry & Endodontics Vol.32 No.2

본 연구는 조선대학교 치과병원의 진료환경 및 진료요원으로부터 기회감염성 병원체로 알려진 methicillin 또는 vancomycin 저항성 황색포도상 구균 (methicillin- or vancomycin-resistant Staphylococcus aureus: MRSA or VRSA)의 존재 여부를 조사하여, 이를 광주지역 개원치과와 비교분석을 통해 현재 조선대학교 치과병원의 MRSA와 VRSA의 오염정도를 파악하고자 하였다. 이를 위해 진료실 환경 및 진료요원으로부터 분리한 S. aureus 균주들의 8종 항생제에 대한 감수성 조사를 시행하고, 기존에 알려진 항생제 내성 유전자 존재 여부를 PCR법을 이용하여 확인하였다. 그 결과, 조선대학교 치과병원의 진료요원에서 채취한 샘플 중 1개 (2.3%), 개원 치과에서는 2명 (10%)의 진료요원의 샘플에서 S. aureus가 분리되었으며, 진료환경에서는 두 곳 모두에서 S. aureus가 검출되지 않았다. 조선대학교 치과병원과 개원치과에서 분리된 S. aureus는 amoxicillin, penicillin G, ciprofloxacin, clindamycin, vancomycin에 내성을 보이며, oxacillin, cefuroxime에는 균주에 따라 감수성 또는 내성을 보였다. 조선대학교 치과병원에서 분리 된 S. aureus는 erythromycin과 clindamycin에 내성 유전자인 ermA가 존재 하였으며, 개원치과에서 분리된 3개의 S. aureus 중 2개에서 penicillin과 oxacillin에 내성 유전자 mecA가 존재하는 것으로 나타났다. Vancomycin 내성 유전자인 vanA, vanB는 어떠한 샘플에서도 검출되지 않았다. 이상의 결과를 종합할 때, 본 연구는 조선대학교 치과병원과 개원치과의 S. aurues 분포 및 MRSA 또는 VRSA의 존재여부를 조사하여 MRSA와 VRSA의 확산예방을 위한 치과진료 환경의 개선과 적절한 항생제 사용에 대한 기초 자료를 제공할 것으로 사료된다. The purpose of this study was to obtain the basic information for the improvement of dental environment by investigating the presence of methicillin- or vancomycin-resistant Staphylococcus aureus (MRSA or VRSA) isolated from dental health care workers (DHCWs) and environment of the Chosun University Dental Hospital (CUDH) and a private dental clinic (control group). Staphylococcus aureus (S. aureus) was isolated from anterior nares of 42 DHCWs and 38 sites, unit chairs, x-ray devices, computers, etc., at 10 departments of the CUDH and 20 DHCWs and 11 sites at the private dental clinic. S. aureus was isolated on mannitol salt agar plate and confirmed by PCR with S. aureus species-specific primer. Antimicrobial susceptibility test of clinical isolates of S. aureus against several antibiotics including methicillin (oxacillin) was performed by investigating minimum inhibitory concentration (MIC) using broth microdilution assay. In addition, PCR was performed to detect the methicillin- or vancomycin-resistant gene. The data showed that one strain of S. aureus was isolated from DHCWs of the CUDH and three strains of S. aureus was isolated from 3 samples of the private dental clinic, respectively. All of the isolates from the CUDH and the private dental clinic had resistance to penicillin G, amoxicillin and vancomycin and susceptibility to oxacillin and ciprofloxacin. The S. aureus strains were already obtained the resistance to penicillin G and amoxicillin. These results suggest that two dental clinics were under relatively safe environment.