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Supervised learning에 기반한 돼지 발성음 분류에 관한 연구
민경진(KyoungJin Min),이혁재(HyeokJae Lee),황현진(HyunJin Hwang),이상엽(SangYeob Lee),이강휘(KangHwi Lee),문상호(SangHo Moon),이정은(JungEun Lee),이정환(Jeong Whan Lee) 대한전기학회 2021 전기학회논문지 Vol.70 No.5
This study categorizes the current situation of the pig as supervised learning through the analysis of the pig’s sound. Audio data were obtained from video data obtained by recording at a barn. Speech data was preprocessed to extract features in the time domain and frequency domain, and formants and MFCC were extracted in the frequency domain. Decision Tree, K-Nearest Neighbors, and Support Vector Machine were used for classification, and linear and RBF kernels were used for SVM. The experiment was conducted two times: classifying using features used in Praat and MDVP, which are speech analysis programs, and classifying using MFCC used in speech recognition. After classification, k-fold verification was performed. As a result of the experiment, it can be seen that there is a difference in classification according to the characteristics of using the same voice, and in the case of a situation in which the sound is unified, such as ‘cough,’ the judgment of any classifier is clear. However, in other situations, it is considered necessary to consider the characteristics of pigs by further observing their socialization behavior.
Plan of Sapti Community Garden-Park by Design Charrette
Kyoungjin Lee,Junghan Sung 전북대학교 휴양및경관계획연구소 2018 휴양및경관연구 (J East Asian Landscape Studies) Vol.12 No.4
Yesan-gun was selected to receive a “Village Community Garden Project” in 2018 to foster a sense of community and improve the urban landscape by working with neighbors to create a happy living space for residents. Yesan-gun selected Sapti Park, located in Yesan-eup, as the project site. The project was carried out through the design charrette method (an intense period of collaborative creativity) to allow residents to propose and design park concepts themselves for the community garden construction project to ensure that that the park facilities would provide something for everyone to enjoy. This study followed the actual design project that actively introduced the design charrette in planning the community garden, describing the entire design process from planning to construction and revealing how the opinions of residents were projected onto the design drawings. The purpose of the project was to advance user-participation design methods by reviewing the progress of the design charrette process and to examine how storytelling, the act of conveying ideas through a fun and persuasive story, transformed the plans for the community garden.
이경진 ( Kyoungjin Lee ) 한국통합교육과정학회 2018 통합교육과정연구 Vol.12 No.4
본 연구는 지식 통합을 인식 행위의 한 국면으로 이해함으로써 통합에 대한 이론적 근거를 확장하고, 분과와 통합으로 나누어진 교육과정 내의 이분법적 진영 구도를 극복하는 것이 목적이다. 이를 위해 지식 통합에 대한 기존의 정의들을 기능적 이해로 규정하고 그 한계를 고찰하였다. 이와 대비하여 지식 통합을 인식론에 의거하여 논의한 후 그 교육과 정적 함의를 도출하였다. 연구의 결과는 다음과 같다. 지식 통합을 인식론적으로 논의한다는 것은 모든 학문의 논리적 관련을 검토하는 것이 아니라, 인간 인식의 발달 관점에서 논의하는 것이다. 미분화는 인식 이전의 상태이고, 분화와 통합은 개념을 통한 인식 행위의 양면을 구성한다. 통합을 인간 인식 행위의 자연적 과정으로 이해하게 될 때, 이 개념은 분과 교육과 통합 교육에 모두 적용 가능한 개념이 된다. This study aims to extend the theoretic basis for knowledge integration by understanding the integration as a phase of cognitive behavior and to overcome the dichotomy that divides the curriculum into differentiation and integration. To this end, the existing definitions of knowledge integration were defined as functional understandings, and their limitations were examined. On the other hand, knowledge integration was discussed based on epistemology, after which curricular implications were derived. The results are that knowledge integration is a natural process in human knowledge-creating activities, so it is applicable to both separated subject and integrated subject. This discussion can serve to overcome the dichotomy in curriculum, in addition to reconsidering the quality of the integrated curriculum.
우경진(KyoungJin Woo),민문기(Moonki Min),이정현(Junghyun Lee),주보경(Bokyoung Chu),이승환(Seunghwan Lee),김경민(Gyeongmin Kim),김희주(Heuijoo Kim),김지만(Jiman Kim),황희성(Heuiseong Hwang),유영준(Youngjoon Yoo) 한국추진공학회 2017 한국추진공학회 학술대회논문집 Vol.2017 No.5
초고속 수상정의 추진 기관으로써 추력 조절 및 수중 운용이 가능한 하이브리드 추진 기관을 개발하였다. Ground Test Motor를 설계 및 제작하여 지상 시험을 통해 추진 기관의 성능을 검증하였으며, Underwater Woring Motor를 설계, 제작하여 지상 시험 및 수중 추진 시험을 수행하였다. 수중 운용을 위하여 2단계 점화 방식을 채택하였고, 점화 직전까지 수밀이 가능하도록 노즐 끝단에 파열판을 장착하였다. 최종 선정된 이중 파열판을 장착한 수중 추진 시험에서 성공적인 점화 및 추진이 이루어짐을 확인하였다. A hybrid rocket engine capable of thrust throttling and underwater-working was developed for the underwater high-speed vehicle propulsion system. The hybrid rocket engine was designed and made by two types of ground test motor and underwater working motors. An engine performance was verified by the ground tests with the ground test motor and in the case of underwater motors the ground tests and underwater tests were performed. For the underwater operation a two-stage ignition system was adopted and a rupture disc was installed at the end of nozzle for a water-tight just before an ignition. Successful ignition and propulsion were confirmed in the underwater test with the final selected double rupture disc.
교사의 교육권 관점에서 본 초등통합교과서 제도의 개선 방안 탐색
이경진 ( Kyoungjin Lee ) 한국통합교육과정학회 2018 통합교육과정연구 Vol.12 No.3
본 연구는 교사의 교육권이라는 관점에서 현행 초등통합교과서 제도의 개선 방안을 탐색하는 것이 목적이다. 이를 위해 교사의 교육권에 대한 법적 근거를 살펴보고, 교과서 제도와의 관련성을 분석하였다. 다음으로 초등통합교과 교육과정의 특성과 현행 교과서 체제를 검토하였다. 연구 결과는 다음과 같다. 교사의 교육권은 학생의 학습권 실현이라는 법적 근거와 교육 본질적 근거로 인해 정당성을 획득한다. 이러한 교사의 교육권은 교육 내용과 방법의 선택과 결정이라는 행위로 구현된다. 초등통합교과교육과정의 특성은 학생의 생활사적 맥락에 기반 한 경험중심 교과에 해당하므로, 획일적인 교육 내용과 방법을 지양한다. 이로 인해 교사의 교육권 강화가 필수적인 교과에 해당한다. 따라서 현행 국정교과서라는 체제는 교육과정과 정합성을 획득하고 있지 못하므로 이에 대한 개선이 필요하다. 개선의 방법으로는 교육 방법의 선택권 확대를 위한 다양한 지도서의 개발이 필요하며 교육 내용의 선택권 확대를 위해서는 서책형태의 교과서가 온라인 자료센터와 같은 지원시스템으로 대체될 필요가 있다. The purpose of this study is to explore improvement plans for the current elementary school integrated textbook system from the perspective of teachers’ right to teach. For this purpose, this article examined the legal foundations for teachers’ right to teach and analyzed its connection with the textbook system. Next, this article reviewed the characteristics of the curriculum based on the elementary school integrated textbook system as well as the current textbook system. The following are the results: Teachers’ right to teach gains legitimacy based on the legal basis of fulfilling students’ education right and the essential basis of education. This teachers’ right to teach is fulfilled by selecting and deciding educational contents and methods. As the elementary school integrated curriculum is characterized by the experience-centered curriculum based on students’ life contexts, standardized educational contents and methods are not preferred. In this regard, it amounts to a curriculum that is required to fortify teachers’ right to teach. Since the current government-designated textbook system fails to gain valid curriculum and consistency, some improvements need to be made. A possible way for improvement is to develop various guide books which can expand teachers’ right to select educational methods and to replace form of books with online resource centers which can expand teachers’ right to select educational contents.
고속 인출되는 광섬유의 헬륨 냉각장치 내 공기유입에 대한 수치적 연구
김경진(Kyoungjin Kim),김동주(Dongjoo Kim),곽호상(Ho Sang Kwak),박상희(Sang Hee Park),이영섭(Yeong Seop Lee),송시호(Si Ho Song),이원선(Won Sun Lee),문대승(Dae Seung Moon) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.5
It is essential to properly cool down the glass fiber drawn from the fused silica preform in the high speed manufacturing process of high quality optical fiber. Natural cooling of glass fiber in the quiescent air is adequate only at low speed glass fiber drawing, and the modem optical fiber manufacturing requires a dedicated cooling unit with the helium injection in order to increase the thermal conductivity of cooling gas in the cooling unit. Even though the helium is constantly injected into the cooling unit, the air is still entrained and unavoidable when the glass fiber passes through the cooling unit. Thus, it is critical to find the operating conditions to minimize the amount of the air entrainment. The present numerical study investigates the air entrainment into the cooling unit from the outer atmosphere, and the effects of helium injection rate and direction on the air entrainment rate are discussed.