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피실험자 변동에 강건한 인간 활동 인식을 위한 협력 학습 활용 도메인 일반화
정용태(Yongtae Jeong),김성범(Seoung Bum Kim) 대한산업공학회 2024 대한산업공학회지 Vol.50 No.2
Human activity recognition (HAR) is a rapidly advancing field that uses wearable sensors and devices, such as smartphones, to detect and classify user activities. Despite remarkable growth, HAR models encounter challenges in generalizing to new users because of variations in user characteristics. Transfer learning and domain adaptation have been studied to address this issue, but they rely on the availability of target data. This study presents a collaborative learning for domain generalization (COLDOG) to enhance generalization performance in HAR. COLDOG improves the generalization performance of domain-specific models through collaborative learning and achieves high performance for new users through ensemble of all models. We validate the effectiveness of the proposed method through experiments on various HAR benchmark datasets.
정용태(Yongtae Jeong),정규현(Gyuhyeon Jeong),김태연(Taeyeon Kim),이찬희(Chanhui Lee),윤성욱(Sungwook Yoon),김현기(Hyenki Kim) 한국정보기술학회 2024 Proceedings of KIIT Conference Vol.2024 No.5
본 연구에서는 디스코드 플랫폼을 위한 다기능 봇을 설계 및 구현하였다. 구체적으로 GPT-3 기반의 대화생성 기능, 텍스트를 음성으로 변환하는 TTS 기술, 음악 스트리밍을 위해 yt_dlp 라이브러리를 활용하며, 웹크롤링을 통해 일정 안내 기능을 통합한다. 이러한 기능들은 디스코드 사용자들이 정보를 효율적으로 교환하고, 엔터테인먼트를 즐기는 것을 돕는다. 사용자들은 간단한 명령으로 다양한 작업을 수행할 수 있게 되어 사용자 경험을 극대화한다. The research discusses the design and implementation of a multifunctional bot for the Discord platform. Specifically, it integrates GPT-3 based conversation generation, text-to-speech (TTS) technology, music streaming using the yt_dlp library, and web crawling for schedule management features. These functionalities assist Discord users in efficiently exchanging information and enjoying entertainment. Users can perform various tasks with simple commands, enhancing the user experience.
정용태 ( Yong Tae Jeong ),강민주 ( Min Ju Kang ),김진희 ( Jin Hee Kim ) 대한화장품학회 2015 대한화장품학회지 Vol.41 No.3
본 연구는 오디씨 에탄올 추출물(MSE)의 멜라닌 합성 저해 효과를 밝히는 것이다. 먼저 MSE의 melan-a 세포를 이용한 멜라닌 합성 저해 실험결과, 독성을 보이지 않는 10 μ g/mL의 농도까지 멜라닌 합성 저해 효과를 나타내었다. 또한 tyrosinase, tyrosinase-related protein-1 (TRP-1) 단백질의 발현이 저해되었으며, extracelluar signal-regulated protein kinase (ERK)의 발현을 농도 의존적으로 증가시키는 MSE의 기전을 확인하였다. 뿐만 아니라, 제브라피쉬를 이용한 in vivo 모델의 실험에서도 색소 발생이 저해됨을 관찰하였다. 따라서 오디씨로 부터 획득한 에탄올 추출물이 ERK 단백질의 발현으로 인해 멜라닌 생합성을 억제할 수 있음을 밝혔다. The purpose of this study was to investigate anti-melanogenesis effects of mulberry seed extracts (MSE). MSE inhibited melanogenesis in melan-a cells at 10 μ g/mL without cytotoxicity. Also, MSE decreased tyrosinase, tyrosinase-related protein-1 (TRP-1) protein expression in the melan-a cells. To identify the signaling pathway of MSE, the ability of MSE to influence extracellular signal-regulated protein kinase (ERK) activation was investigated. MSE induced ERK protein expression in a dose-dependent manner. In addition, MSE presented inhibition of the body pigmentation in vivo zebrafish model. These results suggest that MSE may be an effective anti-melanogenesis agent regulating the expression of ERK protein and melanogenic enzymes.
정용태(Yong-Tae Jung),정봉주(Bong Joo Jeong),․,최봉완(Bong-Wan Choi),임동순(Dong-Soon Yim) 한국산업경영시스템학회 2019 한국산업경영시스템학회지 Vol.42 No.1
The Cooperative Engagement Capability (CEC) System produces a synergy between the sensors and shooters that are used on various platforms by integrating them. Even the US Navy has been recently adopting the CEC system that maximizes the effectiveness of the air defense operations by efficiently coordinating the dispersed air defense assets. The Navy of other countries are conducting research studies on the theory and application methods for the CEC system. The ROK Navy has limited air defense capabilities due to its independent weapons systems on battle ships. Therefore, the ROK Navy is currently going through a phase where research on proving the validity of building the CEC system because it will provide a way to overcome the limit of the platform based air defense capability. In this study, our goal is to propose methods that maximize the air defense capability of ROK Navy, identify the available assets for constructing the CEC system, and estimate effects of the CEC system when it is applied to the naval operations. In addition, we will provide a simple model that was developed to estimate these effects and a case study with virtual data to demonstrate the effects of the system when it is applied to the naval operations. The research result of this study will provide a way for building the basis of the Korean CEC system.
홍성갑,정용태,천경호,백순영,Hong, Seong-Gap,Jeong, Yong-Tae,Cheon, Gyeong-Ho,Baek, Sun-Yeong 한국미생물학회 2003 미생물학회지 Vol.39 No.4
본 연구에서는 에어컨 내에서 서식하는 세균을 분리하여 동정하였고 이들 에어컨에 대한 위생 관리에 대하여 조사하였다. 20개의 에어컨 냉각기에서 8종의 세균이 분리, 동정되었는데 그것들은 가장 많이 분리 동정된 Pantoea sp.를 비롯하여 Bacillus circulans, Bacillus pumilus, Corynebacterium, Flavimonas oryzihabitans, Ochrobacterum anthropi, Micrococcus sp., non fermented bacilli (NFB)이었다. 한편 에어컨 사용자 1,322명을 대상으로 에어컨의 위생관리 상태에 대하여 조사하였는데 설문자의 1,138명(86%)이 에어컨 사용시 환기를 하는 것으로 나타났다. 에어컨 청소에 있어서 1,128명(85%)이 청소를 하는 것으로 나타났지만 에어컨의 오염원들이 되는 에어컨의 필터 청소는 864명(66%)이 하지 않는 것으로 나타났고 에어컨의 열교환기는 1089명(82%)이 하지 않는 것으로 나타났다. 이런 결과로 상기에서 언급된 세균들과 같은 에어컨 오염원이 증가하면 호흡기 질환과 같은 인간의 질병을 초래할 수 있다는 것을 알 수 있었고 따라서 에어컨 사용시 에어컨의 오염원제거와 위생관리는 에어컨내 세균으로부터 발생되는 인간의 질병을 예방할 수 있을 것이다. This study was performed to identify the microorganisms from air conditioners and to investigate hygiene management on air conditioners. Eight species of bacteria were isolated and identified from twenty samples of coolers in air conditioners; Pantoea sp., Bacillus circulans, Bacillus pumilus, Corynebacterium, Flavimonas oryzihabitans, Ochrobacterum anthropi, Micrococcus sp., and non fermented bacilli (NFB). One thousand and three hundreds twenty-two persons who used air conditioners in their houses were investigated about the state of hygiene management in their air conditioners. One thousand and one hundred thirty eight persons (86%) of the total investigated persons ventilated their air conditioners and 1,128 persons (85%) of them cleaned their air conditioners. However, 864 persons (66%) of them did not clean filters and 1,089 persons (82%) did not clean the heat exchangers, both of which air conditioners could be easily contaminated by microorganisms. From these results, we could conclude that the contaminants, bacteria as mentioned the above, in air conditioners could cause human disease such as respiratory infections if the number of bacteria increase in air conditioners. Thus, the removal of contaminants and the improved hygiene of the air conditioners can prevent human diseases caused by the released bacteria during the use of air conditioners.