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최경훈,박계각,이수관,윤대근,Choi, Kyoung-Hoon,Park, Gyei-Kark,Lee, Roman R.,Yoon, Dae-Gwun 해양환경안전학회 2012 해양환경안전학회지 Vol.18 No.4
우리나라의 주요 교역권은 아시아, 미주, 유럽 교역권으로 나눌 수 있다. 일반적으로 대량의 화물운송은 해상운송이 주를 이루지만 다른 지역과 다르게 유럽 교역권은 철도 운송이 가능하다. 또한, 중국의 성장으로 동북아 물류 중심지로서의 경쟁력이 약화된 우리나라는 지금의 경쟁구조와는 다른 방안인 철도운송에 주목할 필요가 있다. 이러한 배경 하에 본 연구에서는 한반도 종단 철도(TKR)와 시베리아 횡단철도(TSR)를 이용한 유럽 지역과의 운송 경로를 비교하여 경제성 분석에 주안점을 두었다. 분석의 요소로는 운송거리, 운송기간, 운송비, 추가비용을 중심으로 사용하였으며 분석 결과 6가지의 운송경로 중에서 TKR과 연계한 TSR(Route 1)이 경제적이라는 분석 결과가 나왔다. 따라서 향후 러시아 푸틴정부의 극동발전 전략에 대비하여 우리나라는 TKR과 TSR의 철도운송을 활용하는 것이 국가 경쟁력을 높일 수 있는 방안이 될 것이다. The major trade area of the South Korea is divided into Asia, America and Europe. Generally, marine transportation is the main method of mass cargo transportation, but unlike others, rail transportation is available in the Europe area. Also, as a result of China's growth, South Korea's position as northeast Asia logistics hub has weakened. That is the reason why we need to pay attention to rail transportation, an alternative competitive structure. In accordance with this background, this study focuses on analyzing economic feasibility comparing transportation routes to Europe using Trans-Korea Railway and Trans-Siberia Railway. Factors of analysis are transportation distance, period, cost and additional cost As the result, considering economic feasibility, TKR-TSR route(Route1) is the best transportation approach for six routes. Therefore, using TKR-TSR railway will be the best way to increase nation's competitiveness, in response to Russia government's far-east development strategy.
최경훈(Keong-Hun Choi),하종은(Jong-Eun Ha) 제어로봇시스템학회 2021 제어·로봇·시스템학회 논문지 Vol.27 No.12
In a visual surveillance system, even the same object should exhibit different detection results depending on the surrounding environment configuration. To this end, the model for visual surveillance needs to detect an object by understanding the state of the object according to the environment on the image. In this study, for such visual surveillance, an object segmentation model applied with a transformer structure suitable for image processing was used to divide objects inside the image into foreground and background. A modified attention structure was presented for the corresponding transformer structure, and the results of object segmentation models according to the type of input data were compared.
최경훈(Keong-Hun Choi),하종은(Jong-Eun Ha) 제어로봇시스템학회 2021 제어·로봇·시스템학회 논문지 Vol.27 No.12
Currently, research on artificial intelligence that autonomously interacts with surroundings without human management has attracted research attention in vehicle and robot-related fields. The recognition of the surrounding environment is the basis for artificial intelligence that requires interaction with the surroundings, which means that research on object detection is necessary. In general, object detection proceeds in the same way as detection and segmentation. Among them, in the case of segmentation, the size of the model is smaller, and more information can be obtained than detection using anchors. However, the inferior detection performance and generalization ability of this method for small objects has limited its further application. In this paper, a modified transformer structure with different configuration of training data from the existing label data is presented to improve the performance of segmentation.
장기간 아침 운동프로그램이 지적장애학생의 기초체력 및 신체질량지수(BMI)에 미치는 효과
최경훈(Choi, Kyung-Hoon),한승완(Han, Seung-Wan) 한국체육과학회 2016 한국체육과학회지 Vol.25 No.1
This study is to motivate intellectually disabled students and encourage them to attend aerobic exercise more eagerly by searching for the effect of long period morning exercise on the basic physical strength of intellectually disabled students. This study is conducted through comparing the exercise group with the control group for 32weeks with the process of pretest and posttest studies. The conclusion of this study is as follows. First, female students shows more statistically-significant effects in terms of the effect of cardiovascular endurance than male students while male students do not show statistically-significant effects. Second, when it comes to the effect of aerobic exercise on the flexibility of intellectually disabled students, both male and female students show statistically-significant results. That is, the flexibility of test group reveals relatively higher flexibility than that of the control group. Third, regarding the effect of muscular endurance, male students show higher effects than female students. Female students do not show statistically-significant result Next, regarding the effect of reflexes, male students show higher effects than female students. Female students do not show statistically-significant results. Finally, with regard to the BMI, male students show higher effects than female students. Female students do not show statistically-significant results.