• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -1
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• pp.579-582
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• 2002

For train service, safety and reliability is an inevitable performance. Specially, turn-out system of the railway for safety because of actual part. Hence the management is strictly executed over turn-out systems of the railway. Also number of turn-out system need to monitoring systems. In this paper, the data multi-acquisition system for monitoring it is necessary to reduce the cost from the expensive characteristics of multi-monitoring system according to the importance of each data because this system is based on communication of one to several units. We designed the data multi-acquisition system using numbers of micro-controller and the experiment was executed to the actual turn-out system.

• 간호행정학회지
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• 제15권4호
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• pp.515-526
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• 2009

Purpose: The purpose of this study was to investigate the role of Self-efficacy and Social Support in the emotional labor among hospital nurses. Method: Data was collected from 389 nurses in 3 general hospitals by means of structured questionnaires. Data was analyzed with descriptive statistics, Pearson's correlation coefficient and hierarchial multiple regression using the SPSS 14.0 program. Result: (a) self-efficacy of hospital nurses had no significant moderating and mediating effects between emotional labor and burn out, turn over intention. (b) Social support of hospital nurses had significant mediating effects between emotional labor and burn out, turn over intention. However, social support did not show moderating effects. Conclusion: Social support was a more important predictor of emotional labor than self-efficacy of hospital nurses. This finding suggests the importance of social support to increase hospital nurses psychological well-being and development of organization.

• 조명전기설비학회논문지
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• 제16권5호
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• pp.61-65
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• 2002

SRM 토크는 인덕턴스 프로파일과 전류에 의해 발생한다. 발생한 SRM 토크는 전류제어시 turn-off 각을 제어함으로써 최대화 할 수 있고, 본 논문에서는 최소자승법을 이용하여 구한 함수를 통해 Turn-off 각을 제어할 수 있는 방안을 제안하였다. 시뮬레이션은 3상 6/4극 SRM을 대상으로 하였고, 제안한 방법에 의해 최대 평균토크가 됨을 시뮬레이션을 통해 증명하였다.

• 대한토목학회논문집
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• 제31권5D호
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• pp.663-669
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• 2011

본 연구에서는 좌회전베이가 있는 신호교차로에서 비보호좌회전 신호체계운영에 따른 적정 좌회전 대기차로 길이를 산정하였다. 대기행렬이론을 이용한 시뮬레이션 분석을 통하여 좌회전 대기차로 길이를 산정하였다. 교통량은 교통안전시설실무편람의 비보호좌회전 시행기준에 준거하였으며, 각각의 좌회전 도착률, 서비스율, 좌회전 평균 대기시간, 녹색시간동안 평균대기차량대수, 적색시간동안 평균대기차량대수, 주기당 평균대기차량대수를 구하였다. 본 연구의 결과로 좌회전베이가 있는 신호교차로에서 비보호좌회전으로 운영될 경우 얼마나 충분한 좌회전 대기공간이 확보되어야 하는지 알아보고, 비보호좌회전 신호체계운영에 따른 좌회전 대기차로 길이 산정에 대한 방법론을 대기행렬이론을 이용하여 제시하고자 하였다.

• 한국조사연구학회지:조사연구
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• 제12권1호
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• pp.31-63
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• 2011

이 논문은 많은 비용의 부담없이 어느 후보가 당선될 것인지를 정확히 예측할 수 있는 방법을 찾기 위한 하나의 시도이다. 이 논문에서는 선거기간 동안에 각 후보들이 어느 정도의 득표율을 획득하고 있는지를 예측하기 위해 후보의 가시성, 현직자 효과, 지역 지배 정당효과, 부정 비리 효과, 사표 방지 효과, 중간 평가로서 견제 효과, 정책 효과 등을 독립변수로 삼아 회귀 모형을 만들어 유용한 득표율 예측 모형을 제시하고 있다. 제시된 모형은 득표율 = -4.65 + 1.02 가시성 + 16.90 현직 효과 + 16.78 지역 효과 - 9.12 견제 효과이다. 이 모형의 설명력은 91.2%이며, 다른 조건이 일정할 때 후보의 가시성이 득표율과 거의 같음을 보여준다. 또한 현직자가 16.9%의 후광 효과를, 지역 지배 정당 후보들이 16.8%의 지역 효과를 얻고 있으며, 중간평가로서의 견제 효과 때문에 여당 후보들은 9.1%의 득표율 손실을 보고 있다는 것을 보여준다. 이 모형은 큰 비용의 부담없이 선거 기간 동안 후보자들의 득표율 예측에 활용될 수 있다. 이 이외에도 이 논문은 예측의 정확도를 높이기 위한 각 변수들의 측정 방법들 및 이 모형의 한계점 등을 논의하고 있다.

• 한국운동역학회지
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• 제14권1호
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• pp.133-144
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• 2004

The purpose of this study was to analyze the joint moment on lower extremity during a developpe devant. Data were collected by Kwon3D, KwonGRF program. Two professional modem female dancers were participated in this experiment. Subjects performed a developpe devant in meddle heights. On the axes of X, Y, Z, it was shown that the maximum joint moment was occurred in hip joint. The moments are plotted during developpe devant. The ankle muscles generate a plantar flexion moment and the knee muscles generate a flexion moment and The hip muscles generate a extension moment. So these muscles of joint muscles were known to play a key role in keeping the body balance while doing developpe devant. In addition adduction moment occurred at hip, knee, an ankle in the order of amount, we could assume from this data that him out motion started from the hip joint. There was small active turn out possible below the hip joint. A small amount of extra turn out could be obtained when standing because of flexion between the foot and floor, which could be used to give a passive external rotation force to the whole leg and this could produce a rotation between the knee and foot. This passive external rotation could produce very damaging results. Therefore, lower extremity joint muscles such as hip, knee, and ankle muscle should be trained to keep the body balance and prevent injury during developpe devant performance. And for the safe and perfect turn ort performance, hip joint abduction, the most important external rotating muscle for him out is needed to train and full stretching should be done in advance.

• 대한교통학회지
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• 제19권2호
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• pp.21-28
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• 2001

본 연구는 다양한 좌회전 곡선반경을 갖고 있는 교차로에서의 좌회전 포화교통류율의 분석을 통하여 좌회전의 직진환산계수를 산정하는 것이다. 한국 도로 용량편람에서는 곡선반경이 약 20m 이상인 곳에서는 좌회전 전용차로에 대하여 직진과 같은 포화교통류율을 보이는 것으로 조사되어 좌회전 보정계수는 없는 것으로 제안하고 있다. 하지만 KHCM은 간선도로 위주로 조사 분석되어 곡선반경이 20m 이하인 교차로가 제외되어 있다. 이에 본 연구에서는 좌회전 전용차로 1개를 갖고 곡선반경이 20m 이하인 교차로 포함하여 다양한 곡선반경 가진 교차로를 대상으로 연구를 수행하였다. 본 연구에서는 포화교통류율을 산출하는데 있어서 분산분석의 후속단계인 다중비교(Multiple comparison)방법중 던컨검정(Duncan's Test)을 이용하였다. 본 연구에서 산정된 좌회전의 직진환산계수는 도로용량편람에서 교차로 분석시 교차로 곡선반경을 반영한 정확한 포화교통류율을 산정할 수 있다. 본 연구의 결과는 좌회전 곡선반경 20m 미만 교차로에서의 좌회전 S는 직진포화교통류율 보다 낮게 결과가 나타났다. 이를 직진환산계수화 시키면 좌회전 곡선반경에 따라서 1.05에서 1.14사이다.

• Restorative Dentistry and Endodontics
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• 제18권1호
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• pp.84-94
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• 1993

The purpose of this study was to evaluate flexure strength of composite resin inlay according to heat treatment and duration in comparasion with visible light-cured resin. In this study, materials were used 1 visible light-cured resin and 3 kinds of composite resin inlays. Control group was visible light cured resin (Photo Clearfil Posterior) and experimental groups were composite resin inlays (Brilliant Dentin, Brilliant Enamel and Clearfil CR Inlay). Experimental groups were divided 3 groups: First group was Brilliant Dentin and second group was Brilliant Enamel and -third group was Clearfil CR Inlay. Used experimental groups were calculated flexural strength according to heat treatment and duration. The following results were obtained: 1. Experimental groups were higher flexural strength than control group. 2. At $100^{\circ}C$ when heat treatment carried out 7 minutes flexural strength elevated third group, second group, first group in turn and when heat treatment carried out 15 minutes flexural strength elevated third group, second group, first group in turn but no difference was showed between first and second group. 3. At $125^{\circ}C$ when heat treatment was carried out 7 minutes flexural strength elevated third group, second group, first group in turn and when heat treatment was carried out 15 minutes flexural strength elevated third group, first group, second group in turn but no difference was showed between first and second group. 4. In spite of heat treatment and duration the third group was highest flexural strength in the others groups.

• 한국운동역학회지
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• 제16권2호
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• pp.65-73
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• 2006

The aim of this study was to find out the differences of Kinematics factors from touching down the vaulting board to landing when techniques of 1/1Turn and Tucked were performed on the old vaulting horse and on the new vaulting table. Three national representative men gymnasts were sampled for this study. Three dimension motion analyses by means of six Sony PD-150 video cameras with the velocity of 60 fps were used As a result of analyzing the kinematic data from two kind of vaulting table, the following conclusions were made. 1. The performing time from taking off the vaulting horse to landing(phase 4) in the 1/1 Turn technique on the new vaulting table was significantly longer than that of the old vaulting horse, while the time from contacting to taking off the vaulting horse on the new vaulting table was shorter than that of the old vaulting horse in both and the Tucked techniques. 2. The vertical release COG velocity was faster on the new vaulting table compare to the old vaulting horse in the all kind technique. However the horizontal release COG velocity of the 1/1 Turn technique was faster a little in the old vaulting horse compare to the new vaulting table.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2007년도 제38회 하계학술대회
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• pp.2030-2031
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• 2007

This paper is purpose to understand the surge property for the shorted turn or shorted strand in high voltage motor stator windings. a shorted turn in high voltage motor windings causes a huge circulating current. and overheat windings, consequently burns the motor. a few shorted strands not cause winding failure immediately, but they increase the winding loss and temperature increase due to contact resistance. We carried out the surge test for three cases, normal winding, shorted turn winding and shorted strand winding. and we analyzed the test result.