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Foreign Language Classroom Speaking Anxiety Scale: Development and Psychometric Properties
양태경,박명수 한국응용언어학회 2008 응용 언어학 Vol.24 No.3
The present study developed a Foreign Language Classroom Speaking Anxiety Scale (FLCSAS) for Korean EFL college students. 949 college students responded to a questionnaire, measuring both cognitive and psychosomatic anxiety in various class situations. Psychometric properties such as construct validity and internal reliability were examined. Construct validity was confirmed in that a unidimensionality exists for all items in FLCSAS, resulting from mode of factor analysis. Internal reliability appears fairly high and reasonable, achieving an alpha coefficient of .97 with all items yielding significant corrected item-total scale correlations.
양태경(Taekyung Yang),최연원(Wonyeon Choi),이장명(Jangmyung Lee) 제어로봇시스템학회 2010 제어·로봇·시스템학회 논문지 Vol.16 No.3
The multiple block localization method in a wide area for multiple robots using iGS is proposed in this paper. The iGS is developed for the indoor global localization using ultrasonic and RF sensors. To measure the distance between a mobile robot and a beacon, the tag on the mobile robot wakes up one beacon to send out the ultrasonic signal and measures the traveling time from the beacon to the mobile robot. As the number of robots is increased, the sampling time of localization also becomes longer. Note that only one robot can localize its own position calling beacons one by one during each of the sampling interval. This is a severe constraint for the localization of multiple robots in a wide area. This paper proposes an efficient localization algorithm for the multiple robots in a wide area which can be divided into multiple blocks. For a given block, a master beacon is designated to synchronize robots. By the access of the synchronization signal, each beacon in the selected group sends out an ultrasonic signal. When the robots in the block receive the ultrasonic signal, they can calculate their own locations based on the distances to the beacons, which are obtained by the multiplication of flight time and velocity of the ultrasonic signal. The efficiency of the algorithm is verified through the real experiments.
양태경 ( Tea-kyoung Yang ) 한국미용예술경영학회 2008 미용예술경영연구 Vol.2 No.2
Due to perms or dyes which were popular in the 1990s, as well as perms using heat, and treatments in the 2000s, skin diseases that gives scalp troubles had become serious, and I had felt that many customers were under extreme stress over scalp troubles. And then I came across aroma therapy, and did research on natural herbs, as well on the effects natural herbs have on our body. At a beauty parlor where I worked, I shampooed customers’ hair, giving meridian scalp massage for their scalp management, and the customers were 100% satisfied with it. Because the customers really liked the service, despite the economic depression, the sales could be increased by over 30%. By managing scalps using aroma therapy, scalp troubles could be alleviated, and our beauty parlor become differentiated compared to other nearby beauty parlors, and steady business profits could be made.
양태경(Tae-Kyoung Yang),성덕룡(Deok-Yong Sung) 한국도시철도학회 2017 한국도시철도학회논문집 Vol.5 No.1
In urban railways where the distance between stations is short and the interval of train dispatch is short, rail surface defects occur more frequently in the station area than in the train travel area. In this study, the finite element analysis simulating the frictional heat generated by the braking force of the train was performed and the rolling contact fatigue damage rate was analyzed by deriving the stress in the rail according to the braking force of the train. The maximum stress at 6.8mm from the rail surface and the increase of the braking force to 100, 200 and 300% compared to when the train traveled at 100km/h resulted in the rolling contact fatigue damage on the rail surface Increased about 6~28%, and increased about 3~12% at the depth of about 6.8mm from the rail surface. Therefore, the rail grinding operation to control the degradation of the rail surface caused by the contact between the wheel and the rail is proposed to distinguish between the train travel zone and the braking zone.
도시철도에서 열차제동하중이 레일표면 열화에 미치는 영향
양태경(Tae-Kyoung Yang),오희완(Hee-Wan Oh),성덕룡(Deok-Yong Sung),최진유(Jin-Yu Choi),박용걸(Yong-Gul Park) 한국철도학회 2011 한국철도학회 학술발표대회논문집 Vol.2011 No.10
The rail surface irregularity is generated severely by train braking effect in the section of station. The braking force increases slip rate and friction factors caused by wheel-rail contact points. It brings rail surface irregularity as well. In this study interactions between wheel and rail were investigated using rolling contact fatigue theory and mechanism of rail degradation through fracture mechanics. For the more the Von-Mises stress occurred on the rail due to the interaction between wheel and rail was analyzed using 3-D finite element method. The amounts of surface irregularity of rail were measured according to accumulated passing tonnage in urban railway in fields. Therefore the maintenance of rail should be separated by running and braking sections to prevent RCF defects.