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- 저자 : 김화영(Hwa?Young Kim) (검색결과 4 건)
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오제직,홍춘표,김화영 공주대학교 사범대학 과학교육연구소 1994 과학교육연구 Vol.25 No.1
The purpose of this research is to compare and to analyze eight different science textbooks Ⅱ (the last volume) that are presently in use at the high school. The items that were compared and analrzed are as follows: The construction of each textbook in quantity. The construction of experimentation contents. The construction of contents in textbooks. This study will provide the basic data that is needed to effectively accomplish aims of science education and to enable a guidance teacher to reconstruct the textbook properly to the real condition exiting in each school. The findings of the research are as follows: 1. There is little difference in quantity of materials. But there is difference in quantity of each unit. 2. The number of Gothic-type terms used in each textbook is not unified. The sort of Gothic-type terms used in each textbook is also varied. 3. Photographs and pictures are presented in black and white. They are used for only explaining. 4. Material and method used in experimentation are showed in many ways. But some units are given too much importance. 5. Contents are consisted variously according to authors under the basic frame of education curriculum.
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저강도 펄스형 초음파를 이용한 개의 슬개골 탈구 치료 효과
조성진,김남수,김화영,김선균,이성호,김병수 충남대학교 형질전환복제돼지연구센터 2007 논문집 Vol. No.10
The effect of low-intensity ultrasonography on dislocation of the patella and fracture healing is controversial, and current management of that does not generally involve the use of ultrasound therapy. Nine patients with dislocation of the patella were treated with low-intensity ultrasonography(l5 mW/㎠, 1∼3.3 MHz) per 10-15 min/days, with an interval of 3 days during the last 3 weeks, at Family Animal Hospital(in Kunsan city). Ultrasound therapy may be beneficial to dislocation of the patella and healing. This finding is of considerable importance in that treatment with a low-intensity pulsed ultrasound signal may reduce healing time and could yield substantial cost savings and decreases in disability associated with delayed healing of dislocation of the patella.
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최적 금형연마 가공을 위한 센서 정보 통합 전문가 시스템 개발
안중환,김화영,申云峰,정해도,조규갑 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.1
This paper presents a polishing expert system integrated with sensor information which can modify the polishing sequence and conditions initially determined by the system depending on the on-site polishing status. A practical system using AE sensor to detect the on-line polishing status is developed for the rotational polishing and the smoothly curved sur-face. Database and knowledge base for polishing processes are established by using the results of experiments and also expert's experience. Evaluations are performed for a die of headlight lamp by using both the sensor integrated expert sys-tem and the expert system without sensor. The test results show that the sensor integrated expert system provides more optimal polishing conditions since the proposed system takes advantage of the on-line sensor information.
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초음파 센서를 이용한 무궤도 반송차의 위치 및 방향제어
안중환,김화영,임한석,김동신 부산대학교 공과대학 1989 硏究報告 Vol.38 No.-
The system that could control a position and a direction of a vehicle by means of supersonic sensors was developed. It is composed of a microcomputer, two couples of supersonic sensor, a vehicle, a power supply and interfaces. Two senders are located at a distance on the vehicle and two receivers are located at two reference coordinate points. Supersonic propagation time from each sender to each receiver was conveniently measured in terms of the repeating number of a short machine language program. Experimental results showed that a repeating number was nearly linear with a corresponding distance. Using four measurements, the present position and direction of the vehicle were calculated .And the amounts of distance to be moved and angles to be rotated to get a destination position and direction were calculated. These data were used for controlling the vehicle driven by two wheel step. Judging from movement tests, the controllability and the accuracy of position an direction of a vehicle using supersonic sensors were quite satisfactory.
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