내용 지식과 쓰기 성취의 관계에 대한 연구

서수현,이병승 한국초등국어교육학회 2009 한국초등국어교육 Vol.39 No.-

이 연구의 목적은 주제에 대한 내용 지식과 쓰기 성취의 관련성을 살펴보는 것에 있다. 이에 답하기 위해 이 연구에서는 우선 관련 선행 연구를 검토하는 과정을 통해 주제에 대한 내용 지식은 쓰기 성취에 영향을 미친다는 것을 확인하였다. 또한 쓰기에서 학생들은 자신의 선행 지식과 화제의 영향을 받는다는 것도 확인하였다. 이러한 문제 의식을 바탕으로 이 연구에서는 일반적인 주제에 대한 쓰기 성취와 특정한 내용 지식이 요구되는 쓰기 지식 간의 관계, 내용 지식의 수준과 쓰기 성취 간의 관계, 그리고 성별과 쓰기 성취도의 상호 작용 양상을 살펴 보았다. 연구 결과 일반적인 주제에 대한 쓰기 성취와 특정한 내용 지식이 요구되는 주제에 대한 쓰기 성취는 통계적으로 유의미한 관계가 없었으나, 주제에 대한 내용 지식이 많은 집단과 적은 집단 사이에 쓰기 성취에 있어서는 통계적으로 유의미한 차이가 있었다. 또한 축구에 관한 쓰기 성취별 집단과 성별 사이에 상호 작용이 나타나는가를 분석한 결과 상호작용은 없는 것으로 나타났다. 이러한 연구 결과는 학생들의 쓰기 성취도를 평가하기 위한 쓰기 과제는 특정 영역의 주제를 선정하는 것을 피해야 함을 의미한다. 글쓰기에 있어서 주제 변인이 클 경우 학생들의 쓰기 전략을 온전히 평가할 수 없게 되는 결과를 초래하기 때문이다. 또한 학생들에게 글쓰기를 위한 내용 지식을 제공할 때에는 지식과 기능의 구조를 공유하고 있는 절차에 집중하는 접근을 하는 것이 바람직할 것이다. This study focused on the relations between content knowledge and writing achievement. According to the study result, there were no statistical relations between writing achievement of general and specific subjects. However, there were statistical differences of writing achievement by a group with more subject knowledge and group with less knowledge. The result also shows no other interrelations of writing ability and gender: in general, female students showed higher level of writing ability than male counterparts, while any gender with more knowledge about soccer showed higher level of writing ability on the subject. In other words, the level of knowledge about soccer is the biggest factor that affects the writing achievement regardless of gender when it comes to writing on the subject of soccer. The study clearly proves that the level of knowledge about a subject will mostly affect the achievement of writing on any subject that requires knowledge in certain areas. Any large subject variable factors can be turned into some difficulties when assessing the writing skills of students. However, when it comes to writing, the content knowledge is not separated from writing strategy. While content knowledge is highly related with writing achievement, such content knowledge cannot be learned through reading activity only. content knowledge is impossible to be acquired without concentrated learning process. Therefore, while providing content knowledge to students, it is better to focus on process that offers both knowledge and functions.

서양산 고추냉이 추출물이 함유된 세치제의 효능에 대한 임상적 실험연구

서현우,박호원,김종수,이시영,신일식 大韓小兒齒科學會 2012 大韓小兒齒科學會誌 Vol.39 No.1

The purpose of this study was to find out the effect of dentifrice containing Horseradish (Armoracia rustica) root extracts on improvement of oral hygiene. The clinical evaluation was done participated by 80 adults volunteers who provided a informed consent for their participation. The participants were divided into two groups ; control group (using toothpaste without Horseradish extracts) and experimental group (using toothpaste containing Horseradish extracts). The checklist of the experiment includes the plaque index, gingival index and anti-caries activity. The anti-caries activity was measured by cultivating Streptococcus mutans for 48 hours then estimating the number of increased bacteria using Dentocult SM. The double-blind method was used in this study. The results of this study can be summarized as follows; 1. The plaque formation decreased 28% in control group, 58% in experimental group using dentifrice with Horseradish extracts compared to baseline data. 2. For gingival index, control group and experimental group showed 26% and 40% decrease compared to baseline data, respectively. 3. The score of caries activity test decreased by 4% for control group and 69% for experimental group compared to baseline data. According to the results, a dentifrice containing Horseradish extracts can improve oral hygiene. 식물성 자연추출물 중 하나인 고추냉이 추출물을 배합한 세치제의 구강환경 개선 효과를 알아보기위해 총72명을 대상으로 교차실험 및 이중맹검법을 실시하여 치면세균막지수, 치은염지수 및 우식활성도검사 등을 비교 검토한 결과 다음과 같은 결 론을 얻었다. 1. 치면세균막지수는 초기값에 비해 대조군은 28%, 고추냉이 추출물 배합세치군은 58%의 억제효과를 나타내었다. 2. 치은염지수는 초기값에 비해 대조군은 26%, 고추냉이 추출물 배합세치군은 40%의 억제효과를 나타내었다. 3. Dentocult-SM을 이용한 우식활성도 평가에서는 초기값에 비해 대조군은 4%, 고추냉이 추출물 배합세치군은 69%의 억제효과를 나타내어 고추냉이 추출물 배합세치군이 대조군에 비해 유의할만한 Streptococcus mutans 억제효과를 나 타내었다. 이상의 결과들로 보아 고추냉이 추출물을 배합한 세치제는 치면세균막 억제와 치은염의 감소 그리고 우식활성도 억제에 중 요한 역할을 하여 구강환경 개선에 뛰어난 효과를 보이는 것으로 사료된다.

Helicobacter pylori 양성인 소화성 궤양 및 위염 환자에서 Helicobacter pylori 제균에 대한 판토프라졸 포함 삼제 요법의 임상효과 및 내약성에 대한 연구

서영호,이완식,주영은,김현수,최성규,유종선,김행재,서순팔,김세종 최신의학사 2000 最新醫學 Vol.43 No.11-12

자연정화공법에 의한 하수처리장에서 최적 여재 선정

서동철,이홍재,조주식,박현건,김형갑,허종수 한국환경농학회 2003 한국환경농학회지 Vol.22 No.1

농어촌 등에서 소규모로 발생하는 하수를 환경친화적이고 높은 하수처리효율을 유지하면서 하수처리장의 장기간 사용을 위한 최적의 여재를 선정하기 위하며 자연정화공법을 이용한 소형하수처리장치를 호기성조 및 혐기성조로 구분하여 시공한 다음, 하수처리량 및 여재 입경별 수처리 효율을 조사하였고, 호기성조와 혐기성조에서 여재 입경별 하수의 투수속도를 조사한 결과는 다음과 같다. 호기성조 처리수 및 방류수중의 pH 및 EC는 여제입경에 따라서 별 차이가 없었고, 용존산소는 호기성조를 동과한 호기성조 처리수의 용존산소는 큰 폭으로 증가하였으나 혐기성조를 통과한 방류수의 용존산소는 호기성조 처리수에 비해 약간 감소하여 여재입경 및 하수처리량에 따라서 별 차이가 없이 약 2.4~5.1 mg/L정도이었다. BOD,000 및 탁도 처리율은 여재 대(4~10 mm)를 사용했을 경우에도 호기성조 처리수에서 BOD 처리율은 약 91%이상, COD 처리율은 73%이상, 탁도 처리율은 83%이상이었으며, 이들 처리율은 여재입경이 작을수록 증가하였고 모든 조건에서 방류수중의 BOD 처리율은 98%이상, COD 처리율은 91%이상, 탁도 처리율은 98%이상이었다. 여재입경별 총 질소 및 총 인 처리율은 여재입경이 작을수록 약간 증가하였고, 모든 조건에서 방류수중의 총 질소 처리율은 약 45~59%, 총 인 처리율은 약 80~96% 정도이었다. 하수 처리율 및 투수속도를 고려해 볼 때 하수처리장 호기성조의 최적입경은 2~4 mm정도 혐기성조의 최적입경은 0.1~4 mm정도가 적절한 젓으로 사료되었다. 따라서 이러한 조건을 자연정화공법을 이용한 하수처리장에 적용하면 높은 하수처리효율을 유지하면서 하수처리장의 공극폐쇄현상이 일어나지 않아 장기간 운전할 수 있을 것으로 판단된다. An investigation was carried out to evaluate the effects of pebble size on the small-scale sewage treatment apparatus by natural purification method that consisted of aerobic and anaerobic plot pH and EC in both plots varied minimally regardless of pebble size. DO in aerobic plot increased as the pebble size decreased. That in the anaerobic plot was slightly less in comparison with that of the aerobic plot, but varied minimally, 2.4~5.1 mg/L regardless of pebble size. Under all experimental conditions, removals of BOD, COD and turbidity in anaerobic plot were more than 98, 91 and respectively. Removals of T-N and T-P increased as pebble size decreased. Under all experimental conditions, removals of T-N and T-P in anaerobic plot were about 45~59 and 80~96%, respectively. Judging from the above results, it should be considered that the optimum pebble size and pebble permeability in both plot was 2~4 mm and 0.1~4 mm, respectively.

비목별 분포 분석을 통한 공사비 투입 곡선 예측 모델

서장원,손보식,이현수 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

Recently, feasibility study in Korean construction industry becomes important with the increasing development projects. Especially, economical efficiency study of feasibility study is an important step that decides feasibility, and accurate cash flow analysis is needed in this step. However, in Korean construction industry, research about this field is poor. In most construction company, they use total cost by informal calculation and cost distribution method using standard normal distribution, but this method has a low accuracy. In this study, we found weaknesses of existing methodology through literature review and case-study of 23 projects that carried by a large construction company of korea during recent 7 years. Also, we propose a forecasting model of cost flow curve using triangular distribution and investment curve classified by items of expenditure.

醫藥品 製劑에 分析에 관한 硏究 (第2報) : HPLC에 의한 複合製劑中 Norethindrone 및 Mestranol의 分離定量에 대하여 Isolative determination of Norethindrone and Mestranol in mixed preparations by means HPLC

李賢淑,徐成勳,金壽億 慶熙大學校 1984 論文集 Vol.13 No.-

A rapid, reproducibile high-pressure liquid chromatographic system for the determination of Norethindrone and Mestranol in tablet was investigated in this paper. The results were as follows; 1. The condition of HPLC was a reversed phase column with a mobile phase of Acetonitrile: water(60:40) 2. Reproducibility of Norethindrone and Mestranol was 99.1% ± 1.002, 98.71% ± 1.079 respectively. The average recovery value of Norethindrone and Mestranol in preparation was 100.44% ± 1.241, 98.55% ± 1.919 respectively. 3. Content uniformity of Norethindrone and Mestranol in preparation was 93.19%∼103.91% ± 4.037∼4.827. 4. This assay method could be used for simultaneous determination and content uniformity of Norethindrone and Mestranol in tablet.

Sr·페라이트 플라스틱자석의 제조에 관한 연구

문현욱,최희태,서강수,신용진 明知大學校 産業技術硏究所 1995 産業技術硏究所論文集 Vol.14 No.-

In this paper, we mention he fabrication of Sr ferrite plastic magnet. In order to compose Sr ferrite, first, a little CaO, SiO₂, Na₂SiO₃, and Al₂O₃ are added to SrO5.9Fe₂O₃. Then, the composition is calcinated at 1225℃ under N₂ enviroment for 1 hourwith addition of PVA 5wt% solution. The carbon coating method increase grinding effect on powder fabrication. To fabricate anisotropic Sr ferrite plastic magnet, 80-89wt% of Sr ferrite and polyamide6 are kneaded and then 0-12kOe of magnetic field is applied. On magnet fabrication, an optimal condition of injection mold is obtained under the injection temperature 270℃, the injection pressure 120㎏/㎠, the magnetic field 8kOe and magnetic field applied time 8sec. As the result of experiments, we obtain (BH)max = 2.09MGOe property on anisotropic plastic magnet which is fabricated by using injection mold method in magnetic field.

뇌동맥류의 진단에 대한 전산화단층촬영 뇌혈관조영술과 고식적 뇌혈관조영술의 비교

송상현,윤수한,안영환,안영민,조기홍,조경기,김선용,서정호 대한신경외과학회 1996 Journal of Korean neurosurgical society Vol.25 No.10

Cerebral angiography has been essential for the diagnosis of the intracranial aneurysms but. is sometimes accompanied by serious complications. Resolution of CT angiography was up-graded greatly to represent the three-demensional structure of vesseles since helical CT had been introduced. We have compared 26 cases of CT angiography and 28 cases of conventional angiography in terms of specificity and sensitivity for the diagnosis detectable aneurysm diameter. configurational diagnosis and diagnostic confidency. All results showed no statistical difference between CT angiography and conventional angiography. These should suggest that CT angiography could be replaced with conventional angiography for the diagnosis of ruptured aneurysms and even of unruptured aneurysms. resulting in the introduction of first screening modality of unruptured aneurysms.

품종별 부추 추출물의 항산화성 및 항균성

안명수,김현정,서미숙 한국식생활문화학회 2005 韓國食生活文化學會誌 Vol.20 No.2

The antioxidative and antimicrobial activities were carried on the leeks (Allium tuberosun R.) ethanol extracts in order to find out new food functional components. Three species of leeks used in this study were Chinese leek(long type, LL), general leek(medium type, LM), and medicinal leek (short type, LS). Total amounts of polyphenol compounds in LS was shown as the highest (436.60㎎%) value. All of ethanol extracts of these leeks were shown to be had good electron donating ability(EDA) and nitrite scavenging activity. Specially, the ethanol extract of LS(LSEx) had the highest EDA 30.47% and nitrite scavenging activity 77.24% and the lowest was LMEx. The antioxidative activities of these ethanol extracts on the corn germ oil were measured by peroxide values(POV) and conjugated diene values (CDV) storaging for 30 days at 60±2℃. The antioxidative activities of these extracts by POV and CDV were determined as following order as LSEx> LLEx> LMEx. The antioxidative activities of all extracts were presented as high tendency by increasing adding amounts (0.02%〉0.05%〉0.1%). When the antioxidative activities were compared with BHT and a-tocopherol, the degree of the antioxidative activities of these extracts were certified as lower than BHT and higher than a-tocopherol. And also LSEx, LMEx, and LLEx had antimicrobial effects on the several micro organisms, especially the effect on the Pseudomonas aeruginasa was remarkable. While LMEx had shown inhibit effect on most of micro organism used in this study.

Sr·페라이트의 자기특성에 관한 연구

임재근,서강수,문현욱,신용진 明知大學校 産業技術硏究所 1992 産業技術硏究所論文集 Vol.11 No.-

This thesis is the study on the magnetic properties of strontium (Sr) ferrite. Specimens of SrO·nFe₂O₃,basic composition, with n=5.9 which is nonstoichiomatric composition region were prepared by sintering at 1275°C for 1hr, whthin air surroundings. In order to increase coercivity, additives of 0.4wt%SiO₂ and 0.7wt%CaCO₃ were added into basic composition, and 0.5wt%∼2.0wt%Cr₂O₃ was added as second additives. In case of second additives 1.5wt%Cr₂O₃, it was obtained uniformed grain size and magnetic properties was increased. The sintering temperature was 1150°C, 1180°C, 1210°C, 1240°C and 1270°C respectivily and cooling was performed in furnance. From the research and experiments on the magnetic properties of strontium (Sr) ferrite based on the complex additive technique, it was obtained good magnetic properties of (BH)mas=0.72MGOe, at the sintering temperature of 1210°C, in the case of (basic composition)+(basic additive)+(1.5wt%Cr₂O₃)