• 전기학회논문지
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• 제62권9호
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• pp.1343-1347
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• 2013

This paper presents an analysis methods for current collection quality in catenary system by means of video image based monitoring system. Arcing is the sparking at the interface point between pantograph and contact wire when the electric trains have traction current values at speed. Percentage of arcing at maximum line speed is measurable parameters for compliance with the requirements on dynamic behaviour of the interface between pantograph and contact wire in accordance with requirement of IEC and EN standards. The arc detector and video is installed on a train aim at the trailing contact strip according to the travel direction. The arc detector presented and measured verity of value such as the duration and power density of each arc and the video image is measured a image when the arc is occurred in pantograph. In this paper we analysis of video image in accordance with power density of arcing from arc detector and compared with video image and power density of arcing so as to produce quality of arcing from image.

• 한국지구물리탐사학회:학술대회논문집
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• 한국지구물리탐사학회 2007년도 공동학술대회 논문집
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• pp.317-322
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• 2007

Seismic exploration is divided by reflection and refraction method greatly, and reflection method can analyze complicated underground structure in the basis high resolution image, and refraction method can grasp the velocity structure of underground accurately. This thesis confirmed application of mixed exploration techniques using advantages of reflection and refraction. Reflection data processing applied conventional technique, and inversion of refraction data applied travel time tomographic technique that using SIRT method. Also, could establish initial information in model variable and improved the result of inversion by restricting model parameter value and dimension of area. Confirmed efficient fact in sequence and velocity structure grasping by utilizing accurate initial velocity model made out on the basis of marine reflection data, and mixed exploration technique using reflection and refraction have propriety that can trust in field application.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제16권1호
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• pp.231-244
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• 2022

With the improvement of people's living standards and the development of tourism, tourists have greater freedom in choosing destinations. Therefore, as an indicator of satisfaction with scenic spots, tourist comments are becoming increasingly prominent. This paper aims to compare and analyze the landscape image of the Five Great Mountains in China and provide specific strategies for its development. The online reviews of tourists on the Online Travel Agency (OTA) website about the Five Great Mountains from 2015 to 2018 are collected as research samples. The text analysis method and R language are used to analyze the content of the tourist reviews, while the high-frequency words in the word cloud are used for visual display. In addition, the entropy weight method is used to determine the index weight and tourist satisfaction is evaluated to understand the weaknesses of those scenic spots. The results of the study show that firstly, the tourist satisfaction with the Five Great Mountains is basically consistent with its popularity. Secondly, through weight analysis, tourists pay special attention to the landscape features and environmental health of the scenic area, so that relevant departments should focus on building the landscape characteristics and improving the environmental health of the scenic area. At the same time, the accommodation and service management of the scenic spot cannot be ignored. Finally, according to the analysis results, suggestions are made on how to improve the tourist satisfaction with the Five Great Mountains.

• 문화기술의 융합
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• 제9권4호
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• pp.283-290
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• 2023

유학생이 계속 늘고 있는 국내 교육 시장에서 소셜 미디어를 활용한 대학 마케팅이 중요해지고 있다. 본 연구는 소셜 미디어를 사용하는 소비자의 심리적 요인에서 출발하여 한국 교육 관광지의 온라인 구전의도에 영향을 미치는 요소를 탐구했다. 본 연구에서는 온라인 구전의도에 영향을 미칠 수 있는 영향을 설명하고 있으며 교육 관광지의 이미지와 중국 관광객의 관광만족감의 중요성을 확인했다. 또한, 소셜 미디어를 사용할 목적으로 여행하는 이용자들은 자아 이미지 일치성과 과시적 자기표현을 더 중요시하는 경향을 발견했다. 본 연구에서는 대학 마케팅을 목적으로 소셜 미디어를 사용하고 온라인 구전을 활성화함으로써 중국 관광객이 한국 교육 관광지에 대한 인식을 개선할 수 있으며 나아가서 유학생 모집에서도 성공적일 수 있음을 밝혀냈다.

• 한국ITS학회 논문지
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• 제11권1호
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• pp.1-12
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• 2012

국내에 교통량의 변동을 고려하기 위하여 영상검지기를 이용한 반감응 신호제어시스템의 설치가 증가하고 있지만 그러한 반감응 신호제어시스템의 도입효과 및 성능을 평가하기 위한 절차 및 방법론은 아직까지 수립되어 있지 않다. 이에 본 연구에서는 효과분석 및 성능평가를 위한 방법론을 수립하였다. 개발된 방법론에서는 반감응 신호제어시스템의 특성을 고려하여 교통환경 개선 파악에 유용한 효과척도와 조사항목이 우선 설정되었고, 현장조사와 평가를 통해 시스템의 성능 및 도입에 따른 교통환경의 개선효과를 파악할 수 있는 방법을 제시하고 있다. 또한 본 연구에서는 개발된 방법론을 파주시 반감응 신호제어시스템에 대해서 사례 분석을 실시하였다. 단일교차로와 간선축으로 구분된 사례분석에서 교통량, 통행속도 항목과 신호효율측면의 현시이용효율, 연동효율 등 선정된 효과척도 분석결과 시스템 도입에 따라 일정수준의 개선효과가 있는 것으로 나타났다.

• 문화기술의 융합
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• 제6권4호
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• pp.317-322
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• 2020

본 연구는 성인자녀가 지각하는 부모양육태도가 결혼가치관 및 결혼이미지에 미치는 영향을 알아보고자 하였다. 이를 위해 대구광역시, 경상북도 및 경상남도 지역에 거주하는 20~30대 미혼남녀 411명을 대상으로 온라인과 대면 설문조사를 하였다. SPSS 25.0 프로그램을 이용하여 분석한 결과는 다음과 같다. 첫째, 연구대상자의 일반적 특성 중 성별, 연령, 부모의 결혼형태, 종교, 출생순위에 따라 결혼가치관은 유의한 차이가 나타났으나, 학력과 직업, 동거가족원, 월평균 가구소득, 부모의 학력은 결혼가치관에 무의미하게 나타났다. 그리고 결혼이미지는 성별, 부모의 결혼형태, 결혼의향이 유의미하게 나타났다. 둘째, 성인자녀가 지각하는 부모양육태도는 아버지의 거부적 양육태도가 낮고, 어머니의 수용적 양육태도가 높을수록 결혼에 대한 안정적 가치관이 높은 것으로 확인되었다. 그리고 부모양육태도가 결혼이미지에 미치는 영향은 아버지의 거부적 양육태도가 낮을수록 결혼이미지가 좋아지는 것으로 확인되었다.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
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• pp.820-823
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• 2006

Nonlinear internal waves (NLIW) were studied as a unusual phenomena in the ocean decades ago. As the quality, quantity and variety of satellite images improve over decades, it is founded that NLIW is a ubiquitous phenomenon. Over the continental shelf of northern South China Sea (SCS), both optical and microwave images show that there are trains of NLIW packets near Dongsha Atoll (20.7N, 116.8E). Each packet contains several NLIW fronts. These NLIW packets are nearly parallel to each other and they are refracted, reflected or diffracted by the change of ocean bottom topography. Based on Korteweg de Vries (KdV) theory and the assumption that the bright/dark lines in the satellite images are centers of convergence/divergence of NLIW fronts, one may (1) sort NLIW packets in the same satellite image into groups of the same source, but generated at different tidal cycles, (2) relate NLIW packets in consecutive satellite images of one day apart, (3) locating faint signals of NLIW fronts in a satellite image. The NLIWs travel more than 100 km/day near Dongsha Atoll, with higher speed in deeper water. The bias and standard deviation of predicted location of NLIW front from its true location is about 1% and 5.1%, respectively.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1988년도 한국자동제어학술회의논문집(국제학술편); 한국전력공사연수원, 서울; 21-22 Oct. 1988
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• pp.810-815
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• 1988

This paper presents a mobile robot that travels employing visual information. The mobile robot is equipped solely with a TV camera as a sensor, and views from the TV camera are transferred to a separately installed micro computer through an image acquisition device. An acquired image of a view is processed there and the information necessary for travel is yielded. Instructions based on the information are then sent from the micro computer to the mobile robot, which causes the mobile robot next action. Among several application programs that have already been developed for the mobile robot other than the entire control program, this paper focuses its attention on the travelling control of the mobile robot in a model environment with obstructions as well as an overview of the whole system. The behaviour the present mobile robot takes when it travels among obstructions was investigated by an experiment, and satisfactory results were obtained.

• 산업경영시스템학회지
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• 제23권58호
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• pp.41-47
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• 2000

Global(mega) event has increased throughout the 1990s, with the biggest surge occurring in the Asia-Pacific region. Along with this upward trend, competition for more desirable tourists is also surging, so destinations cannot be complacent (Getz, 1997). Event is appearing as the powerful method in the fierce competition around the industry. International events like 99 Hanam Environment Expo have been held annually in Korea since 1991 in which the local government system started. The main roles of event are to enhance the image of communities and attract tourists (Kotler and Haider and Rein, 1993), to strengthen destination attractiveness as drawing power (Mill and Morrison, 1985), and so on. Focused on the destination image, the research (Sirakaya and Sheppard and McLellan, 1997) about the effect of perceived safety at a potential vacation destination showed that destination marketers, travel agents, and hospitality industry members should be concerned with improving their images when such images are negative with regard to safety. Event industry in Korea does not seriously recognize the importance of the safety management against accidents known for tarnishing the destination images. Moreover few safety standards or studies for event industry can be found. This paper investigated the safety factors considered by visitors of 99 Hanam Environment Expo and analyzed the correlation between the safety factors and the demographic characteristics of the visitors.

• The Journal of Asian Finance, Economics and Business
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• 제7권4호
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• pp.247-258
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• 2020

The study investigates the influences of different factors on revisit intention to Korea of Vietnamese tourists. A mixed-method including qualitative and quantitative methodologies were utilized. A focus group of 9 experts was carried out for reviewing and exploring different factors and the conceptual model. An in-depth interview with 19 participants was developed with an aim to develop and correct measurement items. The conceptual model was tested and developed using data collected by a questionnaire, from a sample of 473 respondents, who have visited Korea by both electronic and paper surveys with non-probability and convenience sampling techniques. The questionnaire in this research applied a 5-point Likert scale and was distributed both electronically using Google form and by questionnaire paper. The Bootstrap model was used for estimating the model parameters for retesting the reliability of the estimates. Factor analysis and Structural Equation Modelling are employed to analyze the data. Results showed that 427 tourists traveling by groups organized by travel companies and 46 tourists traveling on their own. The reliability, tangibility, empathy, and assurance had influences on tourists' intention to revisit a destination, especially through satisfaction mediating construct. Destination image, self-congruity, and the emergence of Hallyu had influences intension revisit through attitude and tourist motivation.