[논문] 2009개정 교육과정에 따른 물리Ⅰ교과서와 영국의 Advancing Physics에 제시된 삽화에 대한 학생의 인식

서주옥,이지애,김영민 釜山大學校 師範大學 科學敎育硏究所 2011 科學敎育硏究報 Vol.38 No.-

Students recognize illustrations before letters when they look at textbooks. Students find some illustrations difficult to understand, not because there is something wrong with the illustration itself but because information has not been provided or presented in an effective way. For this reason, Illustrations are very important for students to build up the concepts of what they are learning. For the purpose of the study, we have made 12 questions with selected 9 illustrations included in Information and Communication unit of the Physics Ⅰ textbooks according to the revised national curriculum in 2009 and Advancing Physics of UK and then we conducted a survey with 360 students of high school and 22 teachers of science. This study intends to recognition the contents of physicsⅠ textbooks, focusing on the chapter of Information and Communication. For this, a questionnaire on the three types of illustrations was prepared to find out what kind of illustration students thought was easy to understand and why they chose it. Based on the answers to the questionnaire, the conditions for clear and effective communication of textbook information through illustrations were found, by analyzing the advantages and disadvantages of some types of illustrations. In this study, illustrations students thought difficult were picked out be easier and clearer to understand to see which of them are more helpful for students. The features of illustrations easy for students to understand well are as follows: First, the essence of improving illustrations is that the contents should be concise and brief in order not to confuse students. The the illustration should also include each step of the process through which the result was achieved, instead of simply showing the result. Second, the illustration should not be difficult to externally visible; When high school students feel frustrated while trying to understand the illustration, they tend to give up rather than ponder more to get to the meaning. Third, no matter how difficult illustrations are, some good clues and explanations about them make students try to understand what they mean positively rather than lose interest.

다중 쓰레드 기반의 병렬처리서버용 안티바이러스 엔진

유주영;김미애;박은옥;박유미;최주영;최은정;김명주 서울여자대학교 컴퓨터과학연구소 2004 정보기술논문지 Vol.2 No.-

악성코드에 대한 보다 바람직한 예방은 클라이언트측이 아닌 서버측에서 이루어지는 것이다. 본 논문에서는 새로운 개념 의 서버용 안티바이러스 엔진인 SAVE 1.0을 설계 구현하여 제시한다. SAVE는 기본적으로 1개의 AV모니터와 다수의 AV에이전트로 구성되어 있는데 다중 CPU를 장착한 병렬처리서버의 특징을 직접 활용하기 위하여 관리자가 다중쓰레드 기법을 직접 지정할 수 있도록 하고 있다 악성코드를 5가지 부류로 구분하여 바이러스 시그너쳐 DB를 구축 제공함으로써 부류별 진단을 지정할 수 있도록 하고 있으며 실시간 네트워크 패킷 검사를 통한 악성코드 유입 점검 기능도 제공한다. 웹 기반의 관리자 인터페이스는 뛰어난 사용자 편의성을 제공하고 있다. 성능실험결과 악성코드 검색율은 국내외 상용제품과 비교해서 매우 우수한 것으로 나타났으며 검색속도에 있어서도 서버의 CPU 수 증가에 거의 선형 비례하여 향상되는 특징을 보이고 있다. It is more desirable to prevent and detect the malicious codes in server system rather than in client PCs. In this paper, we suggest a new anti-virus engine, SAVE 1.0, which is executed on a parallel processing server. SAVE consists of 1 AV monitor and several AV agents. A system administrator can control the degree of multi-thread directly in order to enhance the utilization of parallel processing servers. Virus signature DBs in SAVE are classified into 5 categories, which support system administrator's options to use the classifier or not. By real-time checking of network packets, the influx of malicious codes can be prevented. Web-based GUI is one of the convenient functions provided in SAVE. In performance tests, we have confirmed that SAVE has higher virus detection ratio than any other AV engine, and SAVE has a desirable feature as an software of parallel processing servers since the performance of SAVE is improved almost linearly as the CPUs in a parallel processing server increases.

백서에서 Pulsed Nd:YAG Laser에 의한 치은절제술후의 치유양상

김옥수,정현주 전남대학교 치과대학 1995 전남치대논문집 Vol.7 No.1

Recently, dental laser have been applied for removal of soft tissues, hemostasis & blood coagulation, removal of benign & malignant tumor, treatment of leukoplakia, aphthous ulcer and herpetic lesion, implant second surgery, removal of granulation tissue, frenectomy, clinical crown lengthening, gingivectomy, gingivoplasty, and treatment of dentin hypersensitivity. Even though the frequency of laser treatment is increasing, the research on the healing process after gingivectomy using pulsed Nd : YAG laser is very rare. The purpose of this study was to observe and compare the wound healing after gingivectomy using scalpel and pulsed Nd : YAG laser in the rat. Gingivectomy was performed using pulsed Nd : YAG laser (SUNRISE Technologies, U.S.A., 1.5 Watts, 10pps) on the buccal gingiva of right maxillary first molar and using scalpel (No. 12) on the contralateral side. Those sites treated by surgical scalpel were designated as th control, and by pulsed Nd : YAG laser as the experimental group. Animals were sacrificed after 1, 2, 3, 5, 7, 11 and 14 days postoperatively, and specimens were histologically observed with light microscope. The results were as follows : 1. clinical observation Normal color and shape were observed at the 5th day in the control group and the 7th day in the experimental group. 2. Histologic findings 1) In the control group, denser inflammatory infiltration was observed. 2) Epithelialization started at the 2nd day in the control group, similar to the experimental group and completed at the 11th to the 14th day postoperatively. 3) In the experimental group, connective tissue showed the vacuole formation and degenerative change during early healing period. Healing of connective tissue was slower in the experimental group than in the control group by 2 days. 4) In the both groups, wound healing was completed at the 2nd week. From this study, gingivectomy using pulsed Nd : YAG laser seems to result in a little delayed wound healing process, compared to the gingivectomy using scalpel. Considering the clinical advantages of laser surgery, pulsed Nd : YAG laser might be useful device for gingivectomy.

대장균 Superoxide dismutase에 대한 Paraquat의 호기적 활성저해

강주화,류옥림 효성여자대학교 가정대학 학도호국단 1986 家政大論集 Vol.5 No.-

Turbidometric growth of the Escherisia Coli was drastically inhibited in the presenceof 0.3M paraauat and their growth did not recovered within four hours of test. By the treatment the cells showed only a 30percent of survival when they were coltivated with shaking while they showed 60percent of survival with stationary cultivation. On contrast to it, the oxygen solubilized in the cultural medium was almost same as 30 to 35ppm in the both of shaking and stationary cultural syotem, Activity of superoxidedismutase of the shaking cultured cells was 52.0to 52.9percent against that of control,While activity of the enzyme in stationary cultured cells was 86.2 to 82.7percent.

아동보육 및 교육관련시설에 대한 어머니의 만족도

안지연,안옥희,박인전 영남대학교 지역발전연구소 1998 새마을지역개발연구 Vol.23 No.-

The purpose of this study was to investigate mother's contentment degree of the institutions related to child care and education. The subjects were 463 mothers with children enrolled in the institutions related to child care and education, who lived in T city. The frequency, percentile, means, x^(2) test, ANOVA and Scheffe´-test were used for data - analysis. The major findings showed that (1) mothers with children enrolles in the institutions related to child care and education more importantly perceived the distance to home, regular and consistency education, sociality development than factors when they choose a institution. (2) the degree of satisfaction of mothers with children enrolled in the institutions related to child care and education were significant differences in the teaching tools, facilities and equipments. (3) the degree of satisfaction of mothers with children enrolled in the institutions related to child care and education were no significant differences in the teacher's quality, relationship to teachers. (4) the degree of satisfaction of mothers with children enrolled in the institutions related to child care and education were significant differences in the general management(hours of operation, cost, etc.). (5) the degree of satisfaction of mothers with children enrolled in the institutions related to child care and education were significant differences in the nutrition, safety, care.

마취 위험성이 높은 고령의 환자에서 엔더정을 이용한 대퇴 전자간 골절 치료

신주용,고덕환,김동옥,김동헌 대한골절학회 2004 대한골절학회지 Vol.17 No.2

구개부에 발생한 다형선종의 처치

하주원,백승,송종운,박충열,이용욱,박홍주,오희균,유선열,김옥준 大韓顎顔面成形再建外科學會 2001 Maxillofacial Plastic Reconstructive Surgery Vol.23 No.6

Pleomorphic adenoma of the palate is the most common of all intraoral salivary tumors. It can occur at any age but it presents most commonly in the 40∼60 age group, and there is no significant sex preponderance. It grows slowly and is usually painless, firm, well-circumscribed nodule. Because of high rate of recurrence, extra-capsular excision including the overlying mucosa and margin of normal tissue is recommended. We report 10 cases of palatal pelomorphic adenoma which have been successfully treated by extra-capsular excision. The surgical defects smaller than 3㎝ in diameter were covered with palatal acrylic splint for the secondary healing. The larger defects were repaired using palatal island flap in 3 cases, rotation flap and buccal fat graft in each 1 case. No patient showed any recurrence or malignant change during the mean follow-up period of 4 years and 9 months. These repair methods seem to be simple, reliable and uncomplicated procedures in the palatal surgical defects.

방사선 치료를 받는 암 환자들의 사회적 지지와 삶의 질과의 관계

정주희,류소연,윤혜은,남택근,오윤경,안현옥,박계남,이영선 朝鮮大學校 附設 醫學硏究所 2002 The Medical Journal of Chosun University Vol.27 No.2

Objective : This study was performed to investigate the relationship between social support and quality of life among cancer patients receiving radiation therapy. Matehals and Methods : The data were collected from 98 patients, who were receiving radiation therapy at two university hospitals located in GwangUJu, used by structured questionnaire. For statistical analyses of the association between quality of life and various characteristics, data were analyzed using t-test, ANOVA, Pearson 's correlation, and multiple regression analysis. Results: 1. There were 56(57.1%) males and 42(42.9%) females. Age ranged from 21 to 82 years. The primary sites of cancer were gastrointestinal tract (24.5%), lung (23.5%), breast (21.4%), and head and neck (11.2%) in order. 2. The mean scores of social, family, and medical support were 4.30 0.58, 4.49 0.78, 4.11 0.65, respectively. The score of quality of life was 5.83 1.63 (range: 1.95 ~ 9.05). 3. An analysis of the association between several factors of patients and quality of life showed that the statistically significant factors were age, the presence of distant metastasis, family support, medical support and social support. 4. As a result of the multiple regression analysis, only social support was significant (β=0.932, P=0.02) with quality of life, but age and presence of distant metastasis were not significant. Conclusion : This suggests that quality of life in cancer patients could be improved by strengthening the social support which consists of family and medical support. Further study would be necessary to evaluate separately several aspects of quality of life among cancer patients.

키토산이 배양중인 치주인대세포와 치은섬유아세포에 미치는 영향

김옥수,정현주 전남대학교 치과대학 2001 구강과학 Vol.13 No.1

The aim of this study was to evaluate the effects of chitosan coating on the attachment, proliferation, functional and morphological change of periodontal ligament cells and gingival fibroblasts. Primary culture of human periodontal ligament cells and gingival fibroblasts were grown in Dulbecco's modified Eagle's medium with 10% fetal bovine serum and 1% antibiotics. In experimental group, cells were inoculated in the multiwell plates coated with chitosan in concentration of 0.02, 0.2 and 2㎎/㎖. Cell counting and MTT assay were done after 0.5, 1.5, 3, 6 and 24 hours of incubation to evaluate the cell attachment, and then after 2 and 7 days of culture th evalute the cell proliferation. The alkaline phosphatase activity was measured after 4 and 7 days of culture and the ability to produce mineralized nodules was evaluated after 21 days of culture. The results were as follows: 1. The morphology of both cells on the chitosan coating was round or spheric. Round cells were aggregated arger 6 hours of culture. Aggregated cells on the chitosan ­ coated surface showed nodule ­ like appearance after 24 hours of culture and not achieved confluency at 7 days. 2. During early period of culture, the attachment of periodontal ligament cells and gingical fibroblasts were inhibited by chitosan coating Inhibition of cell attachment tended to increase with the concentration of chitosan. 3. At the chitosan concentration of 0.02 and 0.2㎎/㎖, periodontal ligament cells were more rapidly proliferated at 7 days, compared to the control group. At the concentration of 2㎎/㎖, the proliferation of gingival fibroblasts and periodontal ligament cells was inhibited(p<0.01). 4. Alkaline phosphatase activity of periodontal ligament cells was increased in chitosan ­ coated group, especially at the concentration of 0.02㎎/㎖ after 4 days of culture. Alkaline phosphatase activity of gingival fibroblasts was inhibited by chitosan coating and decreased in course of time. 5. Periodontal ligament cells produced mineralized nodules on chitosancoated wells without the addition of mineralized nodule forming materials (ascorbic acid, β ­ glycerophosphate, dexamethasone). With the addition of mineralized nodule, forming materials, periodontal ligament cells produced more mineralized nodules at the concentration of 0.02㎎/㎖, compared to the control. Gingival fibroblasts also produced the mineralized nodule at the concentration of 2㎎/㎖ of chitosan. In summary, the attachment, proliferation, cell activity, and alkaline phosphatase activity of periodontal ligament cells depended on the concentration of coated chitosan and those of gingival fibroblasts were inhibited by chitosan. Chitosan stimulated mineralized nodule formation by periodontal ligament cells. At the appropriate concentration (0.02㎎/㎖), chitosam could increase alkaline phosphatase activity, stimulate the formation of mineralized nodule by periodontal ligament cells have antifibroblastic activity on gingival fibroblasts. These results suggest that chitosan can be used as an adjunct of regeneration, bone graft and the matrix of tissue engineering for periodontal regeneration, especially bone regeneration.

油膜의 衝突 效果에 對한 硏究

河鈺男,洪錫柱,金炳哲 조선대학교 동력자원연구소 1988 動力資源硏究所誌 Vol.10 No.1

Oil Film can not reduce the error in the course of manufacturing process but also soften the sliding contact, so it can increase the efficiency of the machines. In many case of cold rolling there are impacts and the oil film influences on the structure of the surface. In this manner the influences of the oil film under impact on the flates were studied and the following conclusions were obtained; 1) In the case of being oil film and not being oil film, there were differences in the central area of surface. 2) In the case of not being the oil film the structure of the surface was flated and being ol film the structure did not change. 3) When the oil film is broken by the impact the metal begin to contact and when the viscosity is thick, it hard to breaking. 4) The higher the viscosity is the longer the contact the time of metal.