유아들의 사회적 갈등과 발달적 개념

김희태 한국유아교육학회 2005 유아교육연구 Vol.25 No.5

온도보상 및 선형화 된 전력검출기에 관한 연구

김희태,오재석,박의준,이영순,김병철 한국전자파학회 2000 한국전자파학회논문지 Vol.11 No.8

본 논문에서는 다이오드의 비선형 특성을 선형화하고 온도에 따른 특성 변화를 보상하는 방법에 대해 연구하였다. 입력전력에 대한 다이오드의 비선형성을 선형화학 위해 Square root 회로를 사용하였으며, 온도에 따른 다이오드의 특성변화를 보상하기 위해서는 2개의 동일한 다이오드와 기준전위를 가변시킬 수 있는 OP-Amp를 사용하였다. 그 결과로써, (Square root 회로와 온도보상회로를 이용하여) 설계된 다이오드 전력 검출기는 입력전력이 -6㏈m보다 큰 경우에 0.23$\pm$0.025 V/㏈m의 비율로 선형적으로 출력전력을 검출하였으며, 상온에서 8$0^{\circ}C$까지의 온도변화에 대해 출력전압의 변화없이 안정적으로 동작하였다. In this paper, the method to linearize the non-linearity of diode and to compensate the characteristics change of diode with the temperature is studied. Square root circuit is used to linearize the non-linearity of diode about the input power, and two identical diodes and OP-Amps, which have variable reference, are used to compensate the characteristic change of diode with the temperature. As the result, designed diode power detector (with the square root circuit and temperature compensation circuit) can detect the output power linearly with the 0.23 $\pm$0.025V/dBm rate in the case the input power is greater than -6 dBm, and the designed circuit operates stably with no variation in the output data about the temperature change from the room temperature to 8$0^{\circ}C$.

'한국형 테크노마트'필요하다

김희태,Kim, Hui-Tae 한국과학기술단체총연합회 1998 과학과 기술 Vol.31 No.12

심사효율화를 위한 기업의 협조방안

김희태 한국발명진흥회 1977 特協 Vol.2 No.9

유치원 교사가 인식한 현장문제에 관한 연구

김희태,조주연 啓明大學校 生活科學硏究所 2005 科學論集 Vol.31 No.-

The purpose of this study was to investigate the on-site problems that preschool teachers acknowledged related to their work places. The issues of this study began with not only the incidence, difficulty and solution of the problems perceived by preschool teachers but their level of the problems. The subjects were 151 teachers working at several preschools in the city located in Southeast of Korea, who answered the questionnaire. The results were as follows: First, regarding the incidence of the on-site problems, system was the highest problem in frequency, followed by 'time management', 'control and discipline of children', 'achievement and ability development of teachers', 'relationship with superintendent', 'facility/equipment', and 'program'. Second, regarding the difficulty level of the on-site problems, the problem of 'system' was the highest in difficulty level. Third, regarding the incidence and difficulty level of each problem', developing children's basic life' was the highest in frequency in the problem of 'control and discipline of children'. Then, regarding the difficulty level of each problem, in the problem of 'control and discipline of children', 'prevention and confrontation of children's safety accidents' was the highest in difficulty. Fourth, regarding the way of solution for the on-site problems, teachers chose to 'solve the problem with the advice of fellow teachers' for the problem of 'control and discipline of children'; for the problem of 'program'. For the problem of 'relationship with superintendent', they chose to 'try to understand, endure, and accept despite suffering'and for the problem of 'relationship with colleagues', they chose to 'try to understand, endure, and accept despite suffering'. Also, for the problem of 'relationship with parents', they chose to 'master and apply effective personal relation skills'. In addition, for the problem of 'facility/equipment', they chose to 'actively request the superintendent to repair or purchase needed facility/ equipment'.

화순 임대정 원림의 연혁과 관련인물

김희태 향토문화개발협의회 2014 향토문화 Vol.33 No.-

질병 - 육계 저혈당증(Hypoglycemia)에 관한 고찰

김희태,Kim, Hui-Tae 한국육계협회 2012 월간 닭고기 Vol.18 No.12

1798년 6월 18일, 광주목에서 ‘하여면앙정(荷輿俛仰亭)’을 시제로 과거를 보다-조선후기 광주목 설행 도과(道科) 관련 기록의 검토와 활용-

김희태 향토문화개발협의회 2013 향토문화 Vol.32 No.-

임상적 관점에서 본 Primary Dystonia와 Dystonia-plus Syndrome

김희태 대한신경과학회 2004 대한신경과학회지 Vol.22 No.6

Dystonia is a disorder of movement caused by involuntary, sustained muscle contractions affecting one or more sites of body, frequently causing twisting and repetitive movements, or postures. Dystonic movements and postures can produce a wide range of clinical presentations. Some distinguishing clinical features of dystonia can help the appropriate diagnosis of primary dystonia. The direction of contraction is almost consistent. Action dystonia and occupational dystonia are related to a movement or task-specific movement, respectively. Sensory tricks or gestes antagonistes are usually seen in patients with dystonia. Two types of tremors can be seen in patients with dystonia: a postural and/or action tremor that resembles essential tremor and a rhythmic expression of dystonic tremor. Sometimes dystonic tremor appears to be less regular and can be associated with myoclonus. Onset age of dystonia, body distribution and etiologies are important to correct diagnosis of primary dystonia. It is well known that the age of onset has important prognostic implications. This article highlights general concepts of phenomenology, classification that are relevant for the purpose a clinical diagnosis.

水稻早期移秧으로의 增收와 二化螟蟲 被害로 因한 收穫量差異에 關한 試驗

金熙泰 東國大學校 1965 論文集 Vol.2 No.-

1. An experiment on earlier planting method of paddy has been carried out to determine its adaptability to the natural condition in the Seoul area, using five varieties of early maturing paddy. These seedlings were grown in the upland seedling beds covered with vinyl under which the lowest temperature in which paddy could be just germinated was maintained through out. Earlier planting method showed heavier infestation by rice stem borer and lower harvesting than both early and late planting methods. These results might be due to (firstly) low temperature which was unfavarable to growing seedlings, (secondly) the adult stage of rice stem borer which occured at the field, and (lastly) high temperature when it was at maturing stage, which caused insufficient maturing. However, although it is possible to have harvest in the beginning of September by earlier planting, this is not economically sound in the Seoul area, because the cost required for making upland planting, is prohibitive in the Seoul area, and because the cost required for making upland seedling beds covered with vinyl and the loss of harvest can not be compensated for by cultivating spinach and feeding crops such as radish, which can only grow in September after harvesting. 2. It is a well known phenomenon that the early planting method brings better harvest, effected by longer growing, But since it is more sound to avoid the loss of harvest caused by infestation than to increase harvest by longer growing period, the transplanting, in the Seoul area, was usually done in the middle of June in order to decrease the infestation of rice stem bore by keeping their adult stage in the seedling bed instead of paddy field. Recently, however, the control method of rice stem borer ha s well been established. Therefore another experiment was carried out on the early planting method, using control method. The paddies were sown in water seedling beds without using vinyl on 26th of April and these seedlings were transplanted on 5th of June. This result showed less infestation by rice stem borer than that of earlier planting method and heavier than that of late planting method. However, harvest was realized by this method. In considering only the foregoing results, it may be possible to adopt this method in Korea, provided that rice stem borer should be controlled with insecticide. But early planting method could be adopted only to the limited area where paddy fields had permanent water supply, which covered one half of the total paddy fields. Because every three year the rainfall comes so late that in the paddy field, where the water supply relies on the rainfalls it is impossible to transplant seedlings before late in June and, on the other hand, it is necessary to control the rice stem borer, since the results obtained on the infestation showed a heavier loss, 3,635 suk, by an uncontrolled test compared with 5,219 suk by a controlled test, and in controlling them no success could be expected with only partial control. 3. In Korea, the paddy fields where water supply relies on the rainfall were often in shortage of water for transplanting before the middle of June because of drought, so that it is not avoidable to use the tempoerary planting method of seedling and the old seedling for the late transplanting. For the purpose of avoiding these defects an experiment was done on the late planting method. These results showed that the degree of infestation by rice stem borer on both the controlled and the uncontrolled test were 0.08 and 0.48, which was negligible when the control method was applied. In comparing the degree of infestation it was quite less than both early and earlier planting methods. In the harvest it was 5,162 suk which was slightly less than 5,292 suk obtained by the early planting method. One important thing in this experiment was that there are slight differences in harvest between the uncontrolled test of late planting method and the controlled test of earlier planting method. Therefore, it may be concluded that for the paddy field without watersupply the late planting method could well be adopted, and in the southern part of Korea where precultivating before transplanting is possible, the late planting method could be also adopted, provided the precultivating with crops such as poraroes and flax for which sufficient period for the maturing should be given and cultivating crops after harvest are ensured.