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김일규,손성준,오성섭 大韓顎顔面成形再建外科學會 1995 Maxillofacial Plastic Reconstructive Surgery Vol.17 No.4
This is a clinical and retrospective study who sustained a total of 306 maxillofacial bone fracture and who were treated in our department between 1990-1994. This results were obtained as follows : 1. The ratio of men to women was 3.2 : 1. 2. The age frequency was the highest in the third decade(35%). That of man was the highest in the third decade but that of women in the fourth decade. 3. In respect of incidence, the number of patients has not been increased year after year. There were the highest frequency in September and the lowest frequency in January. 4. The most frequent cause of facial bone fracture was fall down(40.2%), traffic accident(28.1%), fist blow(20.9%), industrial accident(6.2%) and others in order. 5. The most common location of facial bone fracture was mandible(69%), maxillar with zygoma and zygoma in order of frequency. 6. The age frequency of mandible was the third decade(36.5%), the fourth decade(23.2%) and the fourth decade(22.2%) and the fifth decade(15.6%) in order. 7. In respect of incidence of associated injuries, the ratio of absence to presence was 0.7 : 1. 8. In 306 patients of facial bone fracture, the frequency of associated injuries was laceration, extrimities, chest in order.
이 재 성,유 준 혁 대구대학교 정보통신연구소 2014 情報通信硏究 Vol.10 No.1
본 논문은 자율 이동 로봇의 장애물 회피와 관련된 기술동향을 분석하였다. 산업현장, 공공 및 개인 서비스 분야에서 다양하게 사용 중인 이동 로봇에서 안전과 가장 밀접된 장애물 충돌 회피를 위해 사용하는 다양한 기법들을 소개하고, 특히 인공전위계 알고리즘(Artificial Potential Field), 가상역장(Virtual Force Field) 알고리즘, 탄성력(Elastic Force) 알고리즘 등을 분석하고 각각의 장·단점을 도출하였다. This paper presents, the trend of technology regarding obstacle avoidance for autonomous mobile robots. The mobile robots are widely used in various fields such as industry and public personal service area. This paper introduces several techniques of the collision avoidance sith obstacles, which is closely related to the safety, especially three algorithms of artificial potential filed, virtual force field and elastic force are analyzed by figuring out pros and cons of each one.
김성훈,양준묵,추한태,이치원 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.2
While the temperature of the gas was being changed by modifying the value of E/P which being effects the output characteristics of gas laser into a temperature function, the optimum value of E/P was calculated, being applied to Nitrogen laser and was compared with experimental values. The optimum operational characteristics by the variation of the nitrogen gas temperature is observed at 30 ℃ in gas temperature and 120 torr in gas pressure. Also the value of E/P is evaluated to be 423 V ㎝^-1torr^-1 which is 2.2 times as large as that of theoretical value. According to increasing the nitrogen gas temperature, the nitrogen gas pressure for the laser action is to be broaded. However in this case, the maximum output power is slightly decrease.
金成俊 晋州敎育大學校 科學敎育硏究所 1977 科學敎育硏究 Vol.3 No.-
A Studies on the Diagnostic Elements for Diagnostic Evaluation is to grope about promotion of student's study with the diagnosis in advance which was neglected in teaching and stndy course. Terms, facts, concepts, process and procedur, and observation ability of experiment are presented and studied as contents of basic ability of student for study, amount of study precedent, study lanks by unit and by concept analysis of study subjebt, and analysis of diagnostic Elements. 1. As diagnostic the origin of learning difficulties of students, basic direction for teacher's diagnostic Evaluation are presented and improvement of teaching method, and method for teaching strategy Founding are explained and illustrated. 2. As a results of data abtained with analysis of diagnostic Evaluation aspect, 52.1% lays stress on mental part but diagnois examples for development of research ability is 47.9%. The figures are not agree with the direction of education for science. 3. Text books of natural science for primary school are analyzed and analysis of diagnostic elements, manufacture of diagnosis tools, and diagnosis methods are presented. Prescription and arrangement of teaching method, adjustment of study subjects and results of various diagnosis are presented with possibility for study achievement of student.
박성규,김준태 조선대학교 기초과학연구소 1994 自然科學硏究 Vol.17 No.1
The reactivity increase of unsubstituted energetic compound in cyclic ethers was found in order of three-membered cyclic form < five-membered cyclic form < four-membered cylclic form. The nucleophilicity and basicity of cyclic ethers can be explained by the negative charge on oxygen atom of cyclic ethers. The reactivity of propagation in the polymerization of cylclic ehters can be represented by the positive charge on carbon atom and the LUMO energy of active species of cyclic ethers.
金成俊,朴承禹,張秉郁,權純國,鄭夏禹 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.1
In this study, a daily water balance model for effective rainfall in paddy fields is descrived, and compares the results with field data. The model was used to simulate seasonal effective rainfall for ideal plots with different irrigation scheduling. The followings are a summary of this study results: 1. Effective rainfall during irrigation season of paddy fields in 1985 ranged from 172.3mm at 4cm ridge to 206.7mm at 6cm ridge. They were 63.1% and 75.7% of total precipitation during that span, respectively. The water balance model simulated that 60.5% and 69.5% precipitation may be considered to be effective rainfall. 2. Daily rainfall appears to be important to the ratios of effective rainfall to the total. 3. Measured and estimated effective rainfall had a high correlation. R=0.9805