• 한국항만학회지
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• 제8권1호
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• pp.65-74
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• 1994

There are some turn maneuvers, such as hard Round Turn, Turning Short Round, Williamson Turn and Single Turn, of effectively returning a ship back close to the original track in case of emergency situations of man-overboard and intentional delay of port entrance time, and so forth. But the author developed the new turn maneuvers of Double 30 (woo) Turn originally by means of simulation experiments of Full-Mission Shiphandling Simulator. The conclusions of this study are as follows: 1) By comparison of existing Williamson Turn and Turning Short Round this Double 30(woo) Turn is all-weather multipurpose turn maneuvers in some respects, 2) According to simulation experiments this Double 30 (woo) Turn saved approximately 20-35% of total turning time to the original position and reduced maximum advances by 8-10% approximately in comparison to that of Williamson Turn, 3) Except for emergency men-overboard the Reverse Williamson Turn was proposed as a new reverse maneuver of returning a ship back to the original track.

• 대한교통학회지
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• 제27권3호
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• pp.39-47
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• 2009

교통안전시설 실무편람에 의하면 현재 U-Turn 설치 가능한 지점으로 최소폭원을 '편도 폭 9m 이상'의 지점으로 하고 있으며, U-Turn 허용차량은 승용차로 제한하는 것을 원칙으로 하도록 규정하고 있다. 그러나 최근 대형화된 승용차와 보편화된 SUV(sports utility vehicle)차량이 한번에 U-Turn을 완료하지 못하면서 교통소통과 교통안전에 문제를 야기시키고 있다. 본 연구에서는 실제 차량을 이용한 U-turn 회전반경의 실차 조사치와 교통사고 재현 프로그램인 PC-Crash에 의한 예측치를 비교 검정한 후 PC-Crash를 이용하여 국내 승용차에 대해 U-turn 회전반경에 대해서 예측하고 U-Turn 설치를 위한 적정 폭원으로 제시하였다.

• 대한교통학회지
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• 제26권1호
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• pp.203-213
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• 2008

U-Turn은 운전자에게 편의를 제공하며 차량의 소통효율을 향상시키는 측면도 있지만 U-Turn에 대한 설치기준 및 법제규정과 안전시설 설치기준들이 명확치 않아 교통소통과 교통안전에 문제를 야기시키고 있다. 이에 본 연구에서는 첫째, 교통량과 주행속도를 주요 변수로 하여 차량의 정지시거와 좌회전차량들의 대기행렬길이를 고려한 U-Turn 허용구간과 전방교차로와의 적정 이격거리를 산정한다. 둘째, 현장조사를 통해 실제 U-Turn 차량의 행태를 분석하여 상충형태를 분류하고 상충과 U-Turn 허용구간의 길이와의 관계분석을 통해 차로변경각도와 주행속도를 변수로 하여 U-Turn 허용구간의 길이를 산정한다. 마지막으로 U-Turn허용구간과 후방교차로의 거리는 교통량과 주행속도, 차로변경각도를 주요변수로 하여 간격수락이론을 통해 적정이격거리를 산정한다. 그리고 몇 가지 교통조건들의 환경을 설정하여 모의실험을 실시한다. 이를 통해 본 연구에서는 소통과 안전을 고려한 U-Turn허용구간의 적정길이 및 위치를 제시한다.

• 동의생리병리학회지
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• 제19권2호
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• pp.544-548
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• 2005

I studied on the influence of BUDDEUMI(moxa and cupping a boil) in the live blood condition and the favorable turn up a subjective symptom of chronic irritable bowel syndrome patient. The results are as follows : After the perform of BUDDEUMI, in the Erythrocyte Aggregation, the efficiency is 87%(3persons decrease and 10 persons destroy/15 persons). In the Rouleau, the efficiency is 78%(2persons decrease and 5 persons destroy/9 persons). In the Target Cells, the efficiency is 90%(3persons decrease and 6 persons destroy/10 persons). In the Ovalocytes, the efficiency is 88%(3persons decrease and 4 persons destroy/8 persons). In the Poikilocytes, the efficiency is 76%(1persons decrease and 2 persons destroy/4 persons). After the perform of BUDDEUMI, in the Cholesterol Crystals, the efficiency is 82%(3persons decrease and 6 persons destroy/11 persons). In the Atherosclerotic Plaque, the efficiency is 80%(2persons decrease and 2 persons destroy/5 persons). In the Chylous, the efficiency is 86%(3persons decrease and 9 persons destroy/14 persons). On the favorable turn up a subjective symptom, the efficiency of symptom of appetite and digestion is 91%(5persons turn up exceedingly favorable, 9 persons turn up favorable, 7 persons turn up good, 2 persons turn up invalid / 23persons). In the efficiency of symptom of fatigue and feeble is 85%(3persons turn up exceedingly favorable, 6 persons turn up favorable, 8 persons turn up good, 3 persons turn up invalid / 20persons). And the efficiency of symptom of abdominal swelling and displeasure is 88%(2persons turn up exceedingly favorable, 10 persons turn up favorable, 8 persons turn up good, 3 persons turn up invalid / 24persons). In the efficiency of symptom of abdominal pain is 88%(4persons turn up exceedingly favorable, 10 persons turn up favorable, 8 persons turn up good, 3 persons turn up invalid / 25persons). The efficiency of symptom of constipation and diarrhoea is 90%(5persons turn up exceedingly favorable, 9 persons turn up favorable, 6 persons turn up good, 2 persons turn up invalid / 22persons).

• 한국도로학회논문집
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• 제15권3호
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• pp.177-189
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• 2013

PURPOSES: This study aims to suggest a proper left-turn treatment method for the bicycle traffic flow at four-legged intersections. METHODS: Four types of crossing methods are proposed and analyzed : (1) indirect left turn, (2) direct left turn, (3) direct left turn on a Bike Box, and (4) direct left turn on bike left turn lane. The VISSIM simulation tests were conducted based on forty-eight operation scenarios prepared by varying vehicle and bicycle traffic volumes. RESULTS : The results from the four-legged signalized intersections suggest that (1) the indirect left turn is appropriate when vehicle demand is high, (2) the direct left turn is efficient on most traffic situation but the safety is a concern, (3) the direct left turn on a Bike Box is appropriate when bicycle demand is high while vehicle demand is not, and (4) the direct left turn on a bike left turn lane is appropriate when both vehicle and bicycle demand are low. CONCLUSIONS : The direct left turn of bicycle provides more efficiency than the indirect left turn at the four-legged intersections but to apply the methods and to study more, advanced evaluation methods, related law, and insurance programs are needed.

• 대한전기학회논문지
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• 제43권2호
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• pp.244-250
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• 1994

This paper presents the design of a new turn-off gate drive circuit for GTO which can accomplish faster turn-off switching. The major disadvantage of the conventional turn-off gate drive technique is that it has a difficulty in realizing high negative diS1GQT/dt because of VS1RGM(maximum reverse gate voltage) and stray inductances of turn-off gate drive circuit[1~2]. The new trun-off gate drive technique can overcome this problem by adding another turn-off gate drive circuit to the conventional turn-off gate drive circuit. Simulation and experimental results of the new turn-off gate drive circuit in conjunction with chopper circuit verify a faster turn-off switching performance.

• 농촌지도와개발
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• 제11권1호
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• pp.53-65
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• 2004

The purposes for this study was to provide information for developing educational programs for U-turn farmers' based on their needs on rural settlement. Special objectives of the study were; 1) to survey the general characteristics of U-turn farmers including motives. preparation, and education, 2) to investigate problems and difficulties of the U-turn farmers in rural settlement 3) to identify the reasons for success and failure in U-turn filming, and 4) to provide information in developing programs for U-turn farmers. Data for the study were collected from 526 U-turn farmers throughout the country, and after data cleaning, 494 questionnaires were used for data analysis. Based on the results of this study, the following were recommended for further development of U-turn farming programs; 1) to facilitate and expand continuous surveys on the motives. preparation, education and information for U-turn farmers will be neceassary to update the important and current information on U-turn farming. 2) Further examination of the problems and difficulties of U-turn farmers would be necessary to develop appropriate policies and educational programs for U-turn farming. 3) continuous investigations on the reasons for success and failure of U-turn farming would be necessary to develop appropriate apicultural policies. 4) for more effective educational programs for U-turn farmers. selection of educators, institution, curricular and timing etc. Should be carefully designed to meet the practical needs of the U-turn farmers. 5) more research activities should be encouraged to improve program development and implementation of U-turn farming.

• 한국항만학회지
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• 제11권1호
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• pp.29-44
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• 1997

The purpose in this study was to review the travel characteristics of the left-turn signal system on the signalized intersections under the study in Pusan area, construct the appropriate transportation systems under the different left-turn signal system : Protected Left-Turn signal system, Permissive Left-Turn signal system, and Protected-Permissive Left-Turn signal system based upon the travel characteristics reviewed, and finally suggest the optimal left-turn signal system which could reduce traffic delay and fuel consumption. and also improve traffic safety on the signalized intersections based upon the optimal transportation system constructed. Based upon the results, it was concluded that the Protected-Permissive Left-Turn signal system would be better and safer than the Permissive Left-Turn signal system in the aspects which could reduce decrease delay and fuel consumption, and simultaneously increase traffic safety on the signalized intersections, even if the optimal Permissive Left Turn signal system was found to be the best left-turn signal system in the aspects of the Measures of Effectiveness(MOE) on the intersections under the study.

• 한국항공우주학회지
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• 제34권2호
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• pp.36-47
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• 2006

인공위성에서 자세획득을 위해 기동을 하거나 이상상태 발생으로 위성이 임무를 수행하지 못하여 결국에 위성을 잃어버리게 되는 Flat Spin 상태에서 자세를 복구하는 방안인 Dual Spin Turn의 원리에 대한 연구가 수행되었다. Dual Spin Turn 현상에서 중요한 모멘텀 전달 원리를 물리적으로 명확하게 설명하였다. 그리고 기존의 연구결과에서 많이 알려진 방법을 포함하여 일반적인 위성의 관성모멘트 조건과 모멘텀 휠의 회전 방향 등을 여러 가지로 변화시켜 보면서 타당성을 검증하였다. Dual Spin Turn 과정은 개루프 제어와 에너지 감쇄장치의 도입이라는 2단계 제어방법을 이용하여 여러 경우에 대해 시뮬레이션으로 분석해보았다. 또한 제어의 타당성을 입증하기 위해 2단계 제어 이후의 안정성에 대해 검증하였다. 그리고 Dual Spin Turn을 이용하여 Flat Spin Recovery를 수행하는 시나리오를 예제로 제시하였다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제51권7호
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• pp.339-350
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• 2002

Pole arcs, turn-on angle, and turn-off angle are major design factors, which affects Switched Reluctance Motor's torque performance. If these design factors are considered independently, the enhancement of SRM performance is restricted. Therefore, we need to consider pole arcs, turn-on angle and turn-off angle at the same time, when we design SR. In this paper, we analyze how these factors affect to torque ripple and average torque by using dynamic Finite Element Method(FEM) with derive circuit and present the good design results according to the various speeds. Especially, we formulate turn-on and turn-off angle from a voltage equation and present effective design range.