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이동호,최경아,Dongho Lee,Kyoungah Choi 대한원격탐사학회 2023 大韓遠隔探査學會誌 Vol.39 No.5
The utilization of crowdsourced spatial data has been actively researched; however, issues stemming from the uncertainty of data quality have been raised. In particular, when low-quality data is mixed into drone imagery datasets, it can degrade the quality of spatial information output. In order to address these problems, the study presents a methodology for automatically validating the geometric quality of crowdsourced imagery. Key quality factors such as spatial resolution, resolution variation, matching point reprojection error, and bundle adjustment results are utilized. To classify imagery suitable for spatial information generation, training and validation datasets are constructed, and machine learning is conducted using a radial basis function (RBF)-based support vector machine (SVM) model. The trained SVM model achieved a classification accuracy of 99.1%. To evaluate the effectiveness of the quality validation model, imagery sets before and after applying the model to drone imagery not used in training and validation are compared by generating orthoimages. The results confirm that the application of the quality validation model reduces various distortions that can be included in orthoimages and enhances object identifiability. The proposed quality validation methodology is expected to increase the utility of crowdsourced data in spatial information generation by automatically selecting high-quality data from the multitude of crowdsourced data with varying qualities.
통신 프로토콜의 성능분석을 위한 확장된 Timed Petri Net 모델
이동호(Dongho Lee),김종상(Chongsang Kim) 한국정보과학회 1988 정보과학회논문지 Vol.15 No.2
본 논문에서는 timed Petri net에서 세약(constraint)과 확률의 트랜지션 조건을 추가한 확장된 timed Petri net를 제시하였다. 이 방법은 비동기 통신 프로토콜의 모델링과 성능분석, 특히 타임 아웃과 시스템에 의존적인 동작의 모델링을 쉽게 해준다. 이를 통신 프로토콜에 적용시켜 그 유용성을 보였다. In this paper, Extended Timed Petri Nets (ETPN) are presented that have the additional transition conditions of constraints and probabilities about timed Petri net. Such conditions make it easy to model and analyze performance of interacting asynchronous communication protocols, to model timeouts and system dependent behavior. We demonstrate the usefulness of this net by applying it to the analysis of the communication protocol.
이동호(Dongho LEE) 한국수산해양교육학회 2016 水産海洋敎育硏究 Vol.28 No.6
The Fisheries business administration is not only the social sciences in the education of fisheries and marine related fields but also has been lectured and educated in both high school and college level. But there are few studies that have been conducted a comparative analysis on the contents in fisheries business administration education in the continuity and sustainability. The objectives of this study are analysis of contents construction in fisheries business administration and suggestion of systematic structure with comparing the textbook of fisheries business administration in high school and college(Gyeongsang National University and Pukyong National University). The results of study show that some structural contents similarity has been found among the fisheries business administration textbooks though some of the contents are insufficient. And there are lack of recency both data and descriptions in fisheries business administration textbooks and much of time gaps based on publication year. Based on the result of this study, the integrated framework that consist with 5 main contents categories has been suggested for education of sustainable development in fisheries business administration. But still needed to be discussed the range and level of fisheries business administration issues by stakesholders including academic community, researcher and industrial personnel.
초등 예비교사들이 인식하는 태권도 이미지 및 형성 요인 탐색
이동호(Lee, DongHo),양정모(Yang, JeongMo) 학습자중심교과교육학회 2020 학습자중심교과교육연구 Vol.20 No.22
이 연구는 초등 예비교사들이 태권도에 대해 어떠한 이미지를 갖고 있는지, 그리고 그러한 이미지를 갖게 된 형성 요인이 무엇인지를 탐색함으로써 학교체육에서의 태권도 중요성과 다양한 교육적 가치를 실현함과 동시에 태권도를 활성화하고자 하는 기초자료를 제공하는데 그 목적이 있다. 연구 참여자는 C도에 위치한 G 교육대학교 태권도 수업을 수강한 예비교사 98명을 대상으로 실시하였으며, 자료 수집과 분석은 개방형 설문지를 통해 귀납적 범주 분석을 실시하였다. 다음과 같은 결론을 도출하였다. 첫째, 초등 예비교사들이 태권도에 대해 인식하는 이미지는 한국문화가 가장 높게 범주화 되었고, 무도, 스포츠, 무술, 무예 순으로 범주화되었다. 둘째, 초등 예비교사들이 태권도 이미지를 형성하게 된 요인은 교육적 요인, 대중매체, 간접경험의 대영역으로 범주화되었다. 이는 학교 체육에서 태권도의 다양한 가치를 올바르게 구현할 수 있는 교사들의 역량과 지원 방안에 대한 현실적인 논의의 필요성을 시사한다. The purpose of this study was to provide basic data to realize the importance of Taekwondo and various educational values in school physical education and to activate Taekwondo by exploring what images elementary pre-service teachers have about Taekwondo and what factors are formed to have such images.,The subjects of this study were 98 pre-service teachers who took Taekwondo classes at G Education University located in C province. Data collection and analysis were conducted through inductive category analysis through open questionnaire.,First, Korean culture was the highest category for the images that elementary pre-service teachers perceived about Taekwondo, followed by martial arts, sports, martial arts, and martial arts.,Second, the factors that the elementary pre-service teachers formed Taekwondo image were categorized into educational factors, mass media, and indirect experience.,This suggests the necessity of realistic discussion on teachers competence and support plan to properly implement various values of Taekwondo in school physical education.