http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
벼수확 논에서 트랙터견인형 액비살포기의 소요견인력 측정에 관한 연구
오인환,김기덕,Oh, I.H.,Kim, K.D. 한국축산환경학회 2002 축산시설환경학회지 Vol.8 No.2
This study was conducted to improve utilization efficiency of slurry and choose a suitable type of tractor power which can be attached by manure spreader in the paddy field. In the paddy field, the pulling force for the spreader was measured by using a measurement system installed between tractors with and without the spreader. The soil moisture contents at the 0${\sim}$10cm and 10${\sim}$20cm depth of test soil(SiCL) were 28.45% d.b. and 23.47% d.b., respectively in average while Cone Index at l0cm and 15cm depth were 14.5kPa and 16.2kPa, respectively. It was impossible to measure the soil moisture contents and Cone Index below 20cm depth of the soil because the hardness of the soil increased greatly. Thereafter, hard pan of the sampled soil was found at 15${\sim}$20cm depth. While the required power only for the dragged tractor was found to be 3.44kW in the test field, the required pulling powers of tractor considering the pumping were 8.48${\sim}$12.48kW, 12.19${\sim}$16.19kW, 16.96${\sim}$20.96kW, respectively for 2 tons, 3 tons, and 4 tons of tank capacity. As the tank capacity increased, the sinkage of soil were also increased to 7cm, l0cm, and 12cm, respectively for the tractors with 2 tons, 3 tons and 4 tons of tank capacity. Considering about 60% of pulling efficiency of tractor, a tractor which had lower than 25.74kW of pulling power was suitable to pull the spreader and spread the slurry simultaneously for manure spreader with 2 tons of tank capacity. 29.42kW${\sim}$36.78kW of pulling power was found to be optimum for the tractor with 3 tons of tank capacity while over 40.45kW for 4 tons of tank capacity.
김기덕 ( K. D. Kim ),신범수 ( B. S. Shin ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2012 강원 농업생명환경연구 Vol.24 No.2
The purpose of this research was to construct the hardware to control tractors` steering autonomously using an electro hydraulic direction/flow control valve and steering angle sensors attached to king pins on both front wheels for the automatic driving as well as a DGPS for the navigation. A steering control algorithm is developed to drive the tractor straightforward from a position to the destination position for the parallel tracking farm-work operation. Contrary to previous steering control systems which use dead zones for starting point and finishing point, in this research, the dead zone for only finishing points was used in order to make it converged and proceed faster. The preliminary experimental results showed that P-control was sufficient as long as the control time of a loop maintained less than 50 ms. Since GPS provides data on every 200 ms, however, the same control of 50 ms interval was replicated 4 times, for a single period of position data acquisition. Through experiments conducted by changing the amount of steering angle at given ground speed, it was concluded that the desired RMS error should be less than 20 cm of GPS measurement error. The steering angle per control cycle should be within 2.65 ° when the ground speed of tractor is 0.836 m/s. If the tractor speed gets slow upto 0.491 m/s, the amount of steering angle should be less than 11.25 °.
고지영,김기덕,박창서,KO J. Y.,KIM K. D.,PARK C. S. 대한영상치의학회 1996 Imaging Science in Dentistry Vol.26 No.2
The purpose of this study was to know the proper diagnosis and to establish the treatment plan of the osteosarcoma in the jaws through the clinical, radiological, and histopathologic considerations. The authors compared and analyzed the clinicoradiologic features of the six cases of osteosarcoma, diagnosed at the Dental college hospital in Yonsei University, Seoul, Korea, during the period from 1975 to 1995. The obtained results were as follows; 1. Osteosarcoma occurred in the mean age, 26.2 years, ranged from 14 to 35 years, and equally in men and women. 2. The swelling was the most common frequent presenting complaints. Other reported symtoms included pain, parasthesia of the lower lip or the lesion. 3. The average interval was seen 3.5 months before the patient had been seen by a doctor. 4. The frequency of the lesions was equally in the maxilla, 3 cases and mandible, 3 cases. 5. Radiologically, osteolytic lesions were 2 cases, mixed lesion 1 case, and sclerotic lesion were 3 cases. Periosteal reaction features were shown in 4 cases. A widening of the periodotnal lignament space, one of the earliest signs were shown in 2 cases. 6. Histopathologically, osteoblastic osteosarcoma which is seen in the 3 cases was the most frequent histologic type. Chondroblastic osteosarcoma were seen in the 2 cases. There was no correlation between the radiologic appearance and hitopathologic type.
양주환,김기덕,Yang, J.H.,Kim, K.D. 국립한국농수산대학교 교육개발센터 2012 현장농업연구지 = Journal of practical agricultural resear Vol.14 No.1
The objective of this study is to provide development strategies in the production and distribution system of highland Chinese cabbage by evaluating and analyzing problems of the current system, focusing on several main stages between production and distribution system of highland Chinese cabbage. Through interview of groups such as farmers, distributers in the main producing areas, commission merchants of the wholesale market and large-scale distributors the relavant information was collected. Also, data such as production situations in main producing areas, distribution conditions in the wholesale market was analyzed. The functions of highland Chinese cabbage were classified and the current state of highland Chinese cabbage distribution system was investigated to provide an overall insight into the highland Chinese cabbage distribution system. Also the factors which will affect a price of wholesale market and consumer of highland Chinese cabbage were examined. Finally problems and improvements in the production and distribution system through analysis of the distribution system of highland Chinese cabbage were provided. the main contents of this study are as follows. The first is to keep stability of production in main producing areas by applying a differentiated production method, for example, rainshelter cultivation method. The second is to establish the distribution system which the relevant information is opened transparently. The third is that the consistent cold transportation system from main producing areas to consumers must be built.