Polyistotic Fibrous Dysplasia 1例 : Report of a Case

이승기,김덕정,김영조,김학현 최신의학사 1971 最新醫學 Vol.14 No.3

A case of the polyostotic polymeric fibrous dysplasia was reported with review of literatures which involved the both maxillary sinusese, mandibls, and left femur, humerus, ulna and all the metacarpals. Homogenous intramedullary bone graft was done for the treatment of the intertrochanteric fracture of the femur in this case.

Pack ice 상태에서의 합성얼음을 이용한 자항시험기법 연구

이승기,김문찬,강현지,신용진,인춘주 대한조선학회 2012 대한조선학회 학술대회자료집 Vol.2012 No.5

The previous study about self-propulsion test with synthetic ice for the Canadian Coast Guard icebreaker should that there were some difference between the tests with a synthetic ice and a refrigerated ice. In the present study, the density of synthetic ice is varied to have more interactive between the hull and ices which might make a more towing force than the previous case. The experimental work with refrigerated ice for the present model ship is expected to be conducted to compare in near future.

탄소피막입자 핵연료를 이용한 가압경수로 노심 핵설계

김명현,배강목,이승기 경희대학교 산학협력기술연구원 1997 산학협력기술연구논문집 Vol.3 No.-

The use of carbon coated fuel particles was applied to the PWR fuel assembly design in order to enhance the safety The feasibility of assembly design was tested and optimum design parameters were sought for the fuel assemblies with particle fuels. Fuel temperature coefficient and moderator temperature coefficient were shown to be all negative, at the operating temperature range. The average fuel temperature at the full power condition was found to be reduced by 150℃ compared to the conventional PWR. A reactor core could be designed within acceptable limits when the core was loaded only with these fuel assemblies.

한국장애운동사에 대한 단상 및 제언

이승기 한국장애학회 2017 한국장애학회 학술대회 자료집 Vol.2017 No.-

麥類條播機用 上向切削 로터리의 碎土性과 所要動力에 關한 硏究(Ⅰ)

崔圭洪,洪顯裕,李承奇 建國大學校 附設 農業資源開發硏究所 1993 農資源開發論集 Vol.18 No.-

본 시험은 麥類畦立細條播機 逆回轉 로터리 作業時 耕深을 16cm로 고정하고 耕耘 피치 및 토양수분 차이가 PTO軸의 토크와 所要動力 排水溝의 형상 및 쇄토율 등에 미치는 영향을 구명하기 위하여 벼 수확을 마치고 벼그루가 남아 있는 埴壤土의 논에서 시험을 실시하였으며 주요 결과는 다음과 같다. 1) PTO軸의 平均토크 및 最大토크는 토양수분에 따라 차이는 있지만 逆回轉 로터리의 耕耘 토크는 耕耘 피치 6cm이하에서는 耕耘 피치 증가에 따라 직선적으로 증가하지만 耕耘 피치 6cm이상에서는 耕耘 피치 증가에 관계없이 거의 일정한 경향이었다. 2) 作業速度와 排水溝 殘存흙 및 覆土狀態는 逆回轉 로터리의 주행속도가 느릴수록 또 PTO回轉速度가 빠를수록 양호하여 주행속도 1단 PTO 3단에서 가장 좋게 나타났다. 3) 쇄토율은 耕耘 피치가 증가할수록 또 토양수분이 높을수록 쇄토율은 떨어지는 경향이었으며, 충분한 碎土程度를 얻기 위하여는 耕耘 피치를 3cm이하로 하고 가능한 토양수분 함량 31.7%(d.b) 이하에서 작업하는 것이 좋을 것으로 판단되었다. 4) PTO軸의 所要動力은 작업속도 1∼4단 로터리 變速段數 1∼3段에서의 PTO軸 所要動力은 토양수분 38.0%(d.b)일 때 5.1∼14.5ps, 35.5%(d.b)의 경우 7.9∼14.2ps, 31.7%(d.b)일 때는 4.6∼12.7ps로 나타나 토양수분이 증가할수록 소용동력은 증가하다가 다시 감소하는 경향이었다. 5) 覆土狀態는 耕耘 피치가 적을수록 양호하여 주행속도 1단 PTO 3단의 경우 가장 좋았으며, 작업능률면을 고려할 때 排水溝 程度, 覆土狀態, 所要動力 및 作業能率 등을 고려할 때 畦立 로터리 파종작업시 PTO變速段數는 3단으로 하고 주행단수는 토양수분 함량 31.7%(d.b) 내외에서는 3단, 토양수분함량 35.5%(d.b) 내외에서는 2단, 토양수분 함량 38.0%(d.b) 이상에서는 1단으로 작업하여야 할 것으로 판단된다. This study was carried out to investigate the soil pulverization rate and power requirement of up-cut rotary of wheat and barley drill seeder for tractor by tilling pitch and soil moisture content. The experiment was conducted in the paddy field of clay roam remaining stem of paddy rice after harvesting. The results are summarized as follows: 1) Average and maximum torque of PTO shaft was increased in proportion with tilling pitch in less than 6cm, but was apt to definite over than 6cm of tilling pitch. 2) The working speed, status of remaining and covering soil in drainage was good in proportion with decrease the travelling speed of up-cut rotary and increae the revolutions per minute. Therefore, the working status in drainage was best in forward first gear and PTO third stage. 3) The soil pulverization rate was decreased according to increase the tilling pitch and soil moisture content. It was concluded that tilling work in 31.7 percent of soil moisture content and less than 3cm of tilling pitch would be good. 4) The power requirement of PTO shaft by soil moisture content were 5.2∼14,5ps in 38.0 percent, 7.9∼14.2ps in 35.1 percent and 4.6∼12.7ps in 31.7 percent soil moisture content. So the power requirement of PTO shaft was apt to increase in proportion with soil moisture content the first and decrease the last. 5) The status of soil covering was good in forward first gear and PTO third stage. When it was considered the status of drainage, covering the soil and power requirement in working performance, it was concluded that the PTO stage would be third and working speed would be forward third gear in 31.7 percent, forward second gear in 35.5 percent and forward first gear in 38.0 percent of moisture content.

動力耕耘機用 Diesel Engine 性能 比較 試驗硏究

李承奇 건국대학교 1985 論文集 Vol.21 No.1

A Study was performed to suggest the way of economical uses and rational managements for the domestic and Japanese manufactured lops diesel entwines detached from the power tillers by the analysis of output, torque and fuel consumption ratio by the engine revolutions. The results obtained are summarized as follows: 1.The maximum output of the domestic manufactured engines was specified as 13ps/2,400rpm, however the results showed that the output was specified 11.9% smaller in the aspect of engine revolution and the engine revolution was specified 170 more in the aspect of output and also the nomal power of the domestic engines was specified as 10ps/2,200rpm, however the test results showed that the output was specified 13% smaller in the aspect of engine revolution and the engine revolution was specified 11.7% more in the aspect of output. 2.The maximum output of the domestic manufactured engines showed bigger than that of the Japanese manufactured N-I by 2. Bps at 2,600rpm, 3.2ps at 2,400rpm, 3.1ps at 2,200rpm, 2.6ps at 2,000rpm, 2.0ps at 1,800rpm, 1.6ps at 1,600rpm, and also the normal output of the domestic engines showed bigger than that of Japanes N-E by 1.3ps at 2,600rpm, 2.5ps at 2,400rpm, 1.8ps at 2,200rprn, 1.4ps at 2,000rpm, 0,8ps at 1,800 rpm and 0.1ps at 1.600 rpm. 3.In case of the lops engine for power tiller, the displacement volume of the domestic engines was 75cc bigger than that of Japanese engines, and the fuel consumption ratio at normal power showed 30gr/ps.h at 2,600rgm, 17gr/ps·h at 2,400rpm, 15gr/ps·h at 2,200rpm, 13gr/ps.h at 2,000rpm, 9gr/ps·h at 1,800rpm and 7gr/ps·h at 1,600rpm. 4.In the aspect of the economical use of fuel and the operation of engines, it is desirable to specify the fuel consumption rate together with the test result of fuel consumption character for the consumers when they select the economical engine. 5.The performance of the automobile engines is usually specified by the displacement volume so it is recommended to specify the performance of farm engines by their displacement volume.

빙두께 및 강도 보정기법을 이용한 모형시험결과의 실선시운전 적용연구

이승기,김문찬,이원준,김현수,이춘주 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.6

In the present study, Full-scale evaluation method has been studied by comparison with sea trial results of Terry-Fox ice breaker. it is normally very difficult to compare the full-scale evaluation results with the sea trial ones directly because the ice thickness and flexural strength are different from each other. The correction methods of HSVA and ITTC have been applied to the evaluation of full-scale result according to the difference of thickness and flexural strength. There are rather good agreement between the corrected full-scale evaluation data and sea trial results in consideration of some uncertainty in actual sea route. The correction method is expected to be validated with more comparison with sea trial results of various ice breakers as well as ice cargo vessels.

生命工學의 原理 : Fundamentals of Genetic Engineering

李承基 한국병원약사회 1988 병원약사회지 Vol.5 No.1

During the last years the knowledge accumulated by fundamental research of DNA recombination in vitro became more relevant to biotechnology. One of the advantages of this genetic material obtained from organisms which cannot be hybridized by means of the classical techniques of chromosomal recombination. In this article the principal requirements of transforming DNA molecules are outlined, and limits of molecular cloning are also discussed. The results of molecular cloning in various systems and their potentials for industrial applications are also commented.

쇄빙연구선 아라온호의 모형시험 및 실선시운전결과를 이용한 성능 비교연구

이승기,김문찬,이원준,김현수,이춘주 대한조선학회 2011 대한조선학회 학술대회자료집 Vol.2011 No.11

In the present study, Full-scale evaluation method has been studied by comparison with sea trial results of ARAON ice breaker. it is normally very difficult to compare the full-scale evaluation results with the sea trial ones directly because the ice thickness and flexural strength are different from each other. The correction methods of HSVA and ITTC have been applied to the evaluation of full-scale result according to the difference of thickness and flexural strength. There are rather good agreement between the corrected full-scale evaluation data and sea trial results in consideration of some uncertainty in actual sea route. The correction method is expected to be validated with more comparison with sea trial results of various ice breakers as well as ice cargo vessels. This paper compared full-scale evaluation results with sea trial results data from the first voyage of the ARAON during her Antartic sea ice trial.

형상기억합금 소선을 이용한 초소형 지그재그 스프링의 제작

이승기,임안수 단국대학교 1999 論文集 Vol.34 No.-

Micro zigzag-type springs have been fabricated and characterized using shape memory alloy wires. Zigzag- type shape memory allloy springs, which are functional material applicable as actuator material, have planar structure. Coil-type springs, however, have three-dimensional structure, so zig zag-type spring has advantages of small dead volume over coil-type spring. The proposed fabrication method of zigzag-type spring is very simple and can be applied for thin-tube type actuator.