• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제53권5호
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• pp.344-350
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• 2004

This paper proposes the train control system for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the train control monitoring system(TCMS) and ATC. Drive type of train control system car can drive with driverless mode basically, and this paper applied special communication type for car control, data analysis, the propulsion efforts and breaking effort can control the cars. It is used vector control in propulsion control and proposed operating pattern for propulsion control thinking operating data of rubber tire LRT.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.382-387
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• 2003

This paper proposes the Train Control System for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System(TCMS) and ATC. Drive Type of Train control system car can drive with Driverless mode basically, and this paper applied 10Mbps special communication type for car control, data analysis, The propulsion efforts and breaking effort can control the cars. It is used Vector Control in Propulsion control and proposed Operating pattern for Propulsion control thinking Operating data of Rubber Tire LRT.

• 한국자동차공학회논문집
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• 제13권5호
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• pp.195-201
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• 2005

In conventional Vehicle Stability Control (VSC) System, a control threshold is designed by average driver characteristics. Despite the stabilizing effort, VSC causes redundancy to an expert driver. An advanced VSC which has flexibility on its control property is proposed in this study. By using lateral velocity estimator, a control threshold is determined on side slip angle and angular velocity phase plane. Vehicle planar motion model based sliding controller is modified with respect to various control thresholds. The performance of the proposed VSC algorithm has been investigated by human-in-the-loop simulation using a vehicle simulator. The simulation results show that the control threshold has to be determined with respect to the driver steering characteristics. A VSC with variable control thresholds would provide an improvement compared to a VSC with a constant threshold.

• 한국철도학회논문집
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• 제6권1호
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• pp.49-57
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• 2003

This paper proposes the Train Control System for the LRT(light rail transit). With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System(TCMS) and ATC. Drive Type of Train control system car can drive with Driverless mode basically, and this paper applied 10Mbps special communication type for car control, data analysis, The propulsion efforts and breaking effort can control the cars. It is used Vector Control in Propulsion control and proposed Operating pattern for Propulsion control thinking Operating data of Rubber Tire LRT.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2003년도 추계학술대회 논문집(III)
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• pp.223-229
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• 2003

This paper proposes the Train control system for the LRT(light rail transit}. With regard to information processing in car, we build a computer network in the car, turned the hardware required for train control into software, and developed the Train Control Monitoring System and ATC. Drive Type of Train control system car can drive with Driverless mode basically, and this paper applied special communication type for car control, data analysis, The propulsion efforts and breaking effort can control the cars. It is used Vector Control in Propulsion control and proposed Operating pattern for Propulsion control thinking Operating data of Rubber Tire LRT.

• 동의신경정신과학회지
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• 제24권3호
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• pp.245-250
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• 2013

Objectives : Psychasthenia is a psychological disorder that is characterized by phobias, obsessions, compulsions, or excessive anxiety. Their thoughts can be scattered and require significant effort to organize, often resulting in sentences that do not come out as intended, making little sense to others. Methods : Two Patients with psychasthenia are unable to resist specific actions or thoughts, regardless of their maladaptive nature and have insufficient control over their conscious thinking and memory, sometimes wandering aimlessly and/or forgetting what they were doing. Results : The constant mental effort induces physiological fatigue, which worsens the condition. Nevertheless, psychasthenia has become a forgotten disorder. We observed two cases that are worthy of the original definition of psychasthenia. Conclusions : It can be concluded that patients with psychasthenia complain of sinking because of a reduction in psychological tension or an effort to recover the reduction in tension.

• Fisheries and Aquatic Sciences
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• 제14권2호
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• pp.138-147
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• 2011

Modeling fishing-gear systems is essential to better understand the factors affecting their movement and for devising strategies to control movement. In this study, we present a generalized mathematical modeling methodology to analyze fishing gear and its various components. Fishing gear can be divided into a finite number of elements that are connected with flexible lines. We use an algorithm to develop a numerical method that calculates precisely the shape and movement of the gear. Fishinggear mathematical models have been used to develop software tools that can design and simulate dynamic movement of novel fishing-gear systems. The tool allowed us to predict the shape and motion of the gear based on changes in operation and gear design parameters. Furthermore, the tool accurately calculated the swept volume of towed gear and the surrounding volume of purse-seine gear. We analyzed the fished volume for trawl and purse-seine gear and proposed a new definition of fishing effort, incorporating the concept of fished space. This method may be useful for quantitative fishery research, which requires a good understanding of the selectivity and efficiency of fishing gear used in surveys.

• 한국전문물리치료학회지
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• 제22권2호
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• pp.11-20
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• 2015

The purpose of this study was to evaluate the effect of dual-task training with cognitive effort on the walking and balance functions of chronic stroke patients. The study included 14 chronic stroke patients, who were randomly divided into the experimental group (EG) and control group (CG), each with 7 patients. The EG performed the dual-task training with cognitive effort 3 times a week, 30 minutes for 4 weeks, where as the CG performed single-task training three times a week, for 30 minutes for 4 weeks. Outcome assessments were made with 10 m walk test, timed up and go test, 6 minutes walk test, and Berg balance scale. In within-group comparison, subjects from the EG showed significant differences in all variables (p<.05), while subjects from the CG showed only significant differences in 6 minutes walk test, and Berg balance scale (p<.05). Further, there was significant difference in the improvement rate of 10 m walk test. The findings suggest that the dual-task with cognitive effort may be beneficial for improving walking and balance functions of patients with chronic stroke.

• 한국컴퓨터정보학회논문지
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• 제4권4호
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• pp.155-162
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• 1999

화상회의 응용이 인터넷을 통해 최선의 서비스를 제공하려면 실 시간성을 지원해야 하는데, 인터넷의 동적인 특성상 멀티미디어 응용의 서비스 품질을 보장하지 못한다. 이런 이유로 화상회의 용용은 송신자와 수신자 사이의 현재 사용 가능한 대역폭을 측정하여 데이터를 적절하게 전송하는 것이 필요하다. 본 논문은 RTCP(Real-time Transport Control Protocol)를 사용하여 가용 대역폭을 측정하고, 측정된 가용 대역폭을 토대로 멀티미디어 데이터를 적절하게 전송하기 위해 코덱에서의 데이터 생성량을 줄이고, 데이터 압축률을 변화시키고, 전송 버퍼에서 패킷 손실률을 기반으로 패킷의 우선 순위에 따라 프레임을 폐기하여, 대역폭에 유연하게 실시간 멀티미디어 데이터를 전송하는 알고리즘을 제안한다.

• 한국자동차공학회논문집
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• 제9권1호
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• pp.139-147
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• 2001

In this study a path control scheme of simulation models of various vehicles to evaluate their handling characteristic is developed. Based on the forward target method, path deviation error is estimated and the required steering effort to reduce the error is computed by Ziegler-Nichols PID control rule. Velocity control model is also included in the proposed path control scheme to achieve the desired velocity. The path control scheme is implemented on a full vehicle model to perform ISO test procedures, such as steady state cornering, lane change, and sinusoidal input, etc. Through the simulations of ISO test procedures and comparison with actual tests, effectiveness and validity of the path control model is demonstrated.