한국인의 구강위생용품 사용실태에 관한 조사연구

서은주,신승철,서현석,김은주,장연수 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.2

The purpose of this study was to evaluate the actual state of Koreans' behavior about the use of oral hygiene devices and to collect the baseline data for developing appropriate educational objectives to improve dental health. Questionnaires were used to personally interview 1,685 residents in Korea. The obtained results were as fallows; 1. Average head size of toothbrushes was 23.2㎜ in children, 28.2㎜ im adults. 2. The averagep percent of using dentifrice containing fluoride at home was 66.7% in children, 71.4% in adults. 3. The average percent of using orthodontic toothbrushes was 50.5% in orthodontic patients, and the average percent of using interdental burshes was only 16.9% in orthodontic patients. 4. The average percent of using dental floss was 22.3% in periodontic patients, and the average percent of using interdental brushes was 16.5% in periodonitc patients. 5. The patients usually use oral hygiene devices by means of dentals' suggestions and commercial advertisement. 6. Generally few people use auxiliary oral hygiene devices. To improve the oral health starus effectively, more improved and correct informations and materials should be provide to dentists, dental hygienists and patients.

Lipomyces starkeyi KSM 22 glucanhydrolase 함유 구강세정액의 치태 억제 효과

서은주,정현주,김도만,김상혁 전남대학교 치의학연구소 2003 구강과학 Vol.15 No.3

A novel glucanhydrolase from Lipomyces starkeyi KSM 22 has been suggested as a promising anti-plaque agent because it has been shown to have additional amylase activity and mutanase activity besides dextranase activity and to strongly bind to hydroxyapatite. Mouthrinsing with Lipomyces starkeyi KSM 22 glucanhydrolase solution was comparable to 0.12% chlorhexidine mouthwash in inhibition of plaque accumulation and gingival inflammation and local side effects were less frequent and less intense in human experimental gingivitis. In this study, Lipomyces starkeyi KSM 22 glucanhydrolase mouthrinses (1 and 2 unit/ml) were compared with a control mouthrinse (commercial 0.01% benzethonium chloride mouthrinse, Caregargle^(�), Hanmi Pharmaceuticals) in the ability to inhibit on plaque formation. A 3-replicate clinical trial using 4-day plaque regrowth model was used. Fifteen volunteers were rendered plaque-free on the 1st day of each study period, ceased toothcleansing, and rinsed 2X daily with allocated mouthrinse thereafter. On day 5, plaque accumulation was scored and the washout periods was 9 days for the next trial. Lipomyces starkeyi KSM 22 glucanhydrolase(1 unit and 2 unit)- containing mouthrinse resulted in significantly lower plaque formation in plaque area and thickness, compared to the control mouthrinse. There was no significant difference in plaque inhibition between enzyme-mouthrinses at 2 different concentrations used. This glucanhydrolase-containing mouthwash resulted in significantly lower plaque area severity index score and tended to have lower plaque thickness severity index score than those of control mouthrinse. But there was no significant difference according to the enzyme concentration. From these results, Lipomyces starkeyi KSM 22 glucanhydrolase-containing mouthrinse has greater inhibitory effect of plaque formation than commercial mouthrinse alone. Therefore, this glucanhydrolase preparation is a promising agent for new mouthwash formulation in the near future.

아동학대의 발생 현황과 관련변인에 대한 연구

서은주,박혜인 啓明大學校 生活科學硏究所 1994 科學論集 Vol.20 No.-

This study was attempt to survey the recent trends of child abuse and to explore the related variables. The subjects were 436 children in the fifth and sixth grade of the elementary school in Taegu and 436 their parents by coupling-data. The main results of this study are as follows: 1. Significant variables related to the child were child's sex and friendship. And significant variables related to the parents were parental unemployment, child rearing attitudes, violence experience, life satisfaction. Then significant variables related to the home environment were family type, residential style, harmony of the home and martal violence. 2. The most significant variable in all type of child abuse was the variable related to the parents. Additionally marital violence was the most influential variable in all types of child abuse.

직류 전동기 속도ㆍ토크 제어를 위한 토크전류관측기 설계

서영수,김은기,김용주 明知大學校 産業技術硏究所 2002 産業技術硏究所論文集 Vol.21 No.-

In this paper, the load torque observer is designed for speed and torque control of dc motor. Load torque is very sensitive to the variation and disturbance of the input parameters. Also, there is a limitation to design the poles of speed and torque responses within PI controller parameters. Thus, a method is required to compensate the load disturbance without regulate the gain of the speed controller. The proposed system can accurately estimate the instantaneous speed even at the low speed range by using the load torque observer based on the torque component of DC motor The system becomes robust against disturbances using a feed-forward control of the load torque estimated automatically at the speed observer.

탐색점 예측에 의한 새로운 다이아몬드 탐색 알고리즘

서은주,한재혁,안재형 충북대학교 컴퓨터정보통신 연구소 2001 컴퓨터정보통신연구 Vol.9 No.1

일반 적인 고속 블록정합 알고리즘들은 현재 프레임의 탐색 블록과 참조 프레임의 탐색영역 내의 블록간 MAD(Mean Absolute Distance)를 비교하므로 탐색점 수만큼 MAD를 구해야 하는 단점이 있다. 이와 같은 고속 블록정합 알고리즘들의 단점을 해결하기 위해 "이웃한 화소는 서로 간에 거의 같은 값을 지니고 있다"라는 특성을 이용한 탐색점 예측에 의한 새로운 DS알고리즘을 제안하였다. 본 논문에서는 각 탐색 단계별로 새로운 탐색점의 MAD를 산출하는 기존의 MAD 연산법을 탈피하고, 이전 단계에서 연산된 MDA를 탐색점 예측에 의한 현재의 탐색점의 MAD로 사용하기 때문에 불필요한 탐색점의 블록간 MAD 연산을 없앨 수 있었다. 움직임 추정 오차는 기존 고속 블록정합 알고리즘과 비교했을 때 비슷한 성능을 나타내었고, 총 연산량은 2FN2Ep만큼 크게 줄어들었다. Ordinary high-speed block matching algorithms have a disadvantage that they need to get MAD (Mean Absolute Distance) as many as the number of search points since the MAD between the current frame's search block and the reference frame's search block is used as the search point. To solve such disadvantage of high-speed block matching algorithm, the proposed New DS algorithm by search point prediction method using a specific characteristic that neighboring pixels have almost same values. In this thesis, we can get rid of unnecessary MAD calculation between the search point blocks by search point prediction which uses the previously calculated MAD as the current search point and by breaking from the established MAD calculation method which calculates the MAD of a new search point by each search stage. Comparing with the established high-speed block matching algorithm, this new calculation's estimated movement error was shown as similar, and the total calculation amount decreased by 2FN2Ep.

Fountain Effect의 이해를 위한 실험 장치의 개발 및 적용

서은미,정기주,이춘우 공주대학교 사범대학 과학교육연구소 2000 과학교육연구 Vol.31 No.1

아래 부분이 물에 잠겨 회전하는 물체에 나타나는 fountain effect를 이론적으로 분석하고 실험 장치를 만들어 이를 확인하였다. We analyzed theoretically about the fountain effect which a rotating metal-sphere shows on water and comparing to the experimental results.

사회정보처리모델을 중심으로 한 공격성에 관한 연구

서현아,지은주 경성대학교 2000 論文集 Vol.21 No.2

This study is basic investigation which is to examine young children's aggression in relation to social information processing model. So empirical studies were examined in which were described children's aggression in connection with social information processing model. The summary of the empirical studies is as follows: First, young children's understanding of the concept of intentionality was discussed among the empirical studies. In the recent studies, however, young children were capable of distinguishing between intentional and unintentional actions when stimulus materials used were concrete and familiar to them. Second, a social information processing model of children' aggression is a function of five steps of processing: encoding of social cues, interpretation of social cues, response search, response evaluation and decision, and enactment. This study was examined unto second processing which is interpretation of social cues to get the attribution of other's intention. Response search also was examined by predicted response and alternative solutions. Aggressive groups were more likely to attribute a hostile intention, to predict their response as more hostile and aggressive, to generate less alternative solutions, to evaluate the aggressive response as more effective and positive than non-aggressive groups. In conclusion, it is hypothesized for children who are biased or deficient at each step to act deviant and aggressive social behaviors.

Calcium Carbonate와 fibrin adhesive의 병용이 성견 2급 치근분지부 치주조직 재생에 미치는 영향

서은표,정현주,김영준 전남대학교 치과대학 2000 전남치대논문집 Vol.12 No.1

The purpose of this study was to evaluate the effect of combined use of fibrin tissue adhesive and porous resorbable calcium carbonate on the periodontal regeneration of the class Ⅱ furcation defects in dogs. Class Ⅱ furcation defect was surgically created on the second, third, and fourth premolars bilaterally in the mandibles of six mongrel dogs. The experimental sites were divided into four groups according to the treatment modalities: Control-surgical debridement only; GroupⅠ-calcium carbonate grafting; Group Ⅱ-application of fibrin adhesive only; Group Ⅲ-application of fibrin adhesive after calcium carbonate grafting. The animals were sacrificed at 2, 4, and 12 weeks after periodontal surgery and the decalcified specimens were prepared for histologic and histometric examination. The results are as follows : Clinically, there were no inflammatory response in all groups after 2, 4, and 12 weeks. In the Control group, junctional epithelium migrated apically to the reference notch. In Group Ⅰ, graft materials exfoliated from the defect throughout the experimental periods and new bone was seen in the notch area at 4 and 12 weeks' specimens. At 2 weeks, fibrin adhesive was indistinguishable in Group Ⅱ. In Group Ⅲ, the graft material was maintained in the defect throughout the experimental periods and the amount of periodontal tissue regeneration was greater than other groups. These results suggest that the use of fibrin tissue adhesive in conjunction with porous resorbable calcium carbonate would improve the stability of graft material and inhibit the epithelial downgrowth and contribute to periodontal regeneration.

온라인 아동 성착취 근절을 위한 법률개정 방안 : 국제규범과 국내 법령의 비교를 중심으로

정주은,남장현,서지혜 이화여자대학교 법학전문대학원 2020 Ewha Law Review Vol.10 No.-

온라인을 기반으로 한 아동ㆍ청소년에 대한 성착취는 아동ㆍ청소년이 쉽게 유혹되고 어른들에 의하여 발견되는 것이 어렵기 때문에 심각한 피해를 야기한다. 본 연구는 온라인 아동 성착취의 심각성을 인지하고 관련 법령의 개정 방안을 제시하고자 하였다. 우선 우리나라의 아동ㆍ청소년의 성보호에 관한 법률 및 형법 등의 법제 및 현황과 문제점을 살펴보았다. 이를 기반으로 UN아동권리협약 및 제2, 제3선택의정서와 UN아동권리위원회의 권고사항 및 특별보고관의 권고, 팔레르모의정서, 란사로테협약 등 국제규범의 내용을 살펴보고, 해당 국제규범과 해외의 입법례 등과 비교하여 현행 국내 법령의 개선방안을 모색하였다. 연구를 통해 현행 국내 법령의 부적절한 용어 개선이 필요하고, 아동 최선의 이익 원칙에 의한 법 해석 및 적용을 해야 하며, 현행 형법을 활용함과 동시에 그루밍 등 새로운 개념에 대하여 법률에 규정해야 함을 발견하였다. 이와 더불어 성착취물 등에 대한 처벌을 확대하고 형량과 양형기준을 개선하여야 할 필요성도 절감하였다. 현재 국회에 계류 중인 법률개정안을 검토하여 해당 법률안에서 주목할 점과 보완할 점에 대하여 설시하였다. 보론으로는 함정수사의 도입과 제3선택의정서 비준의 필요성을 주장하였다. 이에 비추어 볼 때, 최근 일련의 사건 이후 아동ㆍ청소년의 성보호에 관한 법률이 많은 부분에서 긍정적인 방향으로 개정되었지만 보호의 대상인 아동ㆍ청소년에 대한 범죄이므로 더욱 엄중히 처벌해야할 필요필요가 있는바, 국제규범에 따라 아동ㆍ청소년의 성보호를 위한 개정이 더욱 필요함을 시사한다. Online child sexual exploitation leads to serious damage because children and juveniles are easily tempted but it is hard for adults to find the breeding ground for crime. This study was intended to recognize the seriousness of online sexual exploitation for children and juveniles and to propose the law amendment. First of all, we explored the current status and problems of the legislation, such as the Act on the Protection of Sex in children and juveniles and the Criminal Law in the Republic of Korea. We reviewed the contents of international rules such as the U.N. Convention on the Rights of the Child, the Second and Third Choice Protocol, the recommendations of the U.N. Commission on the Rights of the Child, the recommendations from the CRC and special rapporteur, the Palermo Protocol, the Lanzarote Convention. In accordance with those international rules, we sought the amendment of current domestic law. According to the study, we concluded that the inappropriate terms in the current domestic law should be modified, and the law should be interpreted and applied in accordance with the principle of the best interests of children. Also, new concepts such as ‘grooming’ should be stipulated in the law while utilizing the existing Criminal law. In addition, we were faced with the necessity of expanding punishment for sexual exploitation and improving sentencing guidelines. We reviewed the proposition which was pending in the National Assembly and suggested pros and cons. And then, we complementally argued for the institution of entrapment and the ratification of the Third Choice Protocol.

보철물 절삭시 수종의 치과용 절삭기구와 냉각제의 효율성에 관한 연구

정은주,양홍서 전남대학교 치과대학 1996 전남치대논문집 Vol.8 No.1

The purpose of this study was to evaluate effects of dental cutting instruments and coolants to temperature changes of pulp chamber and to cutting weights. To evaluate effects of dental cutting instruments, the experimental groups were devided into 16. Four restorative materials (gold, base metal, resin, porcelain) were grinding with 4 cutting instruments(high speed diamond point, high speed fissure bur, low speed stone point, low speed rubber point). To evaluate effects of coolants, 16 groups were devided into 3 subgroups Group A : no use of coolant Group B : use of air coolant Group C : use of water-air spray coolant The results were as follows : 1. In kinds of coolants, temperature changes were shown in such order as group A, group B, group C. There was statistically significant difference between each group(p<0.05). Cutting weights were shown in such order as group C, group B, group A. There was statically significant difference between group C, B and A(p<0.05). 2. In kinds of cutting instruments, temperature change of diamond point as highest and temperature changes of high speed groups were higher than those of low speed groups. Cutting weights of fissure bur was highest and cutting weights of high speed groups were higher than those of low speed groups. 3. In kinds of materials of specimens, temperature change of base metal was highest and there were statistically significant difference between gold, base metal and resin, porcelain(p<0.05). Cutting weight of gold and base metal were higher than those of resin and porcelain. 4. The surface of specimen of group C, specially in use of high speed cutting instrument, showed less small particles than group A, B in SEM evaluation.