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병렬기구형 틸팅 테이블 및 CAD/CAM 프로그램 개발에 관한 연구
원동희,이민기 國立 昌原大學校 産業技術硏究所 2002 産技硏論文集 Vol.16 No.-
In this paper, we deveop a six-axes machining center tool(MCT) and CAD/CAM system. The MCT consists of two mechanical parts, i.e., a X-Y-Z Cartesian coordinate typed MCT and a parallel-typed tilting table. Kinematics and singularity are accomplished to design the parallel-typed tilting table, and CAD/CAM system is developed for the six-axes MCT, which requires the commands of position as well as orientation for machining of complex shape. The CAD/CAM system has a tool path generator, a NC code generator and a graphic simulator. This paper designs the parallel-typed tilting table to meet the desired specification and present the results of tool path, NC code and graphic simulation.
온라인 스트리밍 채팅 내 이모트가 포함된 혐오 표현 탐지: 딥러닝 모델을 기반으로
김재헌,원동희,차미영 한국정보과학회 2020 정보과학회논문지 Vol.47 No.11
Through the development of the natural language processing, artificial intelligence for the detection of hate speech has also grown. However, malicious users continuously produce new forms of hate speech not identified by the machine. Of the various types is a mixture of text and emotes, easily distinguishable by humans but not by rule-based detection. This study analyzes chat data of Twitch.tv, a popular online streaming service, to identify types of a mixture of text and emotes. We compared the emotes usage in the hate speech and the race of the streamer. Besides, a new method using the bidirectional long short-term memory model is proposed to detect new hate speech types. Among approximately 15 million chats, the proposed method could identify additional hate speech with an F1-score of 0.745. 자연 언어 처리의 발전을 통해 혐오 표현 탐지를 위한 인공지능 또한 성장하게 되었다. 하지만 악성 유저는 지속해서 기계에 의해 식별되지 않는 새로운 형태의 혐오 표현을 생성해낸다. 다양한 유형 중 하나는 텍스트와 이모트의 혼합으로, 인간에 의해서는 쉽게 검출되지만, 규칙 기반 탐지로는 쉽게 검출할 수 없다. 이 연구는 가장 큰 온라인 스트리밍 서비스 중 하나인 트위치(Twitch.tv)의 채팅 데이터를 분석하여 이러한 유형을 파악한다. 혐오 표현에서 사용되는 이모트와 방송을 진행하고 있는 스트리머 인종 간의 비교를 진행한다. 또한 새로운 혐오 표현 유형을 탐지하기 위해 양방향 장단기 메모리 모델을 활용한 새로운 방법을 제시한다. 약 1,500만 개의 채팅 중에서, 이 연구에서 제안된 기법을 통해 F1-score 0.745의 성능으로 혐오 표현을 추가로 검출할 수 있었다.
최미경,원동희,김연주,최미옥,임난영,송정희,Choi, Mi-Kyung,Won, Dong-Hee,Kim, Yeoun-Ju,Choi, Mi-Ok,Lim, Nan-Young,Song, Jung-Hee 대한근관절건강학회 2007 근관절건강학회지 Vol.14 No.1
Purpose: The purpose of this study was to examine the effects of Tai-Chi self-help program for osteoarthritis patients. Method: This study was performed from 1th August. to 30th Dec. 2006. 27 osteoarthritis patients were participated in the Tai-Chi self-help program. Outcome measures were pain, flexibility and balance, self-efficacy. Data were analysed by SPSS WIN 12.0. Result: There were statistically significant in balance and knee flexibility. but no significant differences were found in pain and self-efficacy. Conclusion: In conclusion, Tai-Chi self-help program was proved to be an effective nursing intervention to increase the balance and flexibility. Also 12 forms of Tai-Chi self-help program has been found safely applicable to the patients with osteoarthritis for 8 weeks. A rigorous research design should be further considered to identify the long-term benefit for this population.
병렬기구형 틸팅 테이블 및 RAD Tool 프로그램 개발에 관한 연구
김태성,박성민,원동희,이민기,박근우 한국공작기계학회 2002 한국공작기계학회 춘계학술대회논문집 Vol.2002 No.-
In this paper, we develop a six-axes machining center tool(MCT) and CAD/CAM system based RAD Tool Program. The MCT consists of two mechanical parts, i.e., a X-Y-Z Cartesian coordinate typed MCT and a parallel-typed tilting table. Kinematics and singularity are accomplished to design the parallel-typed tilting table, and RAD Tool Program is developed for the six-axes MCT, which requires the commands of position as well as orientation for machining of complex shape. In RAD Tool, the CAD/CAM system has a tool path generator, NC code generator and a graphic simulator. This paper designs the parallel-typed tilting table to meet the desired specification and presents the results of CAD/CAM system based RAD Tool Program.