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개에서 림프절 전이와 유미흉을 동반한 심낭막 중피종 증례 보고
이정하,이수형,고두민,김대용,Lee, Jeong-Ha,Lee, Su-Hyung,Go, Du-Min,Kim, Dae-Yong 대한수의학회 2016 大韓獸醫學會誌 Vol.56 No.4
Pericardial mesothelioma is a rare neoplasm in dogs. This report describes a case of pericardial mesothelioma in a 13-year-old Shih Tzu that presented with a clinical history of dyspnea. Hemorrhagic pericardial effusion and chylous pleural effusion with reactive mesothelial cells were identified by radiograph and cytology. Necropsy revealed multiple round nodules throughout the pericardium and regional lymph nodes in addition to chylothorax. Histopathology revealed invasive neoplasm on the pericardial surface with metastasis to the lymph nodes. The neoplastic cells were immunopositive to both cytokeratin and vimentin. Diagnosis of pericardial mesothelioma with regional lymph node metastasis was made.
이정하,반효경,Jeongha Lee,Hyokyung Bahn 한국인터넷방송통신학회 2024 한국인터넷방송통신학회 논문지 Vol.24 No.2
With the rapid advance in AI (artificial intelligence) and high-performance computing technologies, deep learning is being used in various fields. Deep learning proceeds training by randomly reading a large amount of data and repeats this process. A large number of files are randomly repeatedly referenced during deep learning, which shows different access characteristics from traditional workloads with temporal locality. In order to cope with the difficulty in caching caused by deep learning, we propose a new sampling method that aims at reducing the randomness of dataset reading and adaptively operating on existing buffer cache algorithms. We show that the proposed policy reduces the miss rate of the buffer cache by 16% on average and up to 33% compared to the existing method, and improves the execution time by up to 24%.
이정하,엄성환,EunHyeLee,Yeoun-Joong Jung,Hyo-Jung Kim,Mi-Ra Jo,Kwang-TaeSon,Hee-Jung Lee,Ji-HoeKim,Myung-Suk Lee,김영목 한국조류학회I 2014 ALGAE Vol.29 No.1
To develop effective and safe acne vulgaris therapies with a continuing demand for new solutions, we investigated unique efficacy of an antibacterial agent from marine brown alga Eisenia bicyclis in treating acne vulgaris. The methanolic extract of E. bicyclis exhibited potential antibacterial activity against acne-related bacteria. The ethyl acetate fraction showed the strongest antibacterial activity against the bacteria among solvent fractions. Six compounds (1-6), previously isolated from the ethyl acetate fraction of E. bicyclis, were evaluated for antibacterial activity against acne-related bacteria. Among them, compound 2 (fucofuroeckol-A [FF]) exhibited the highest antibacterial activity against acne-related bacteria with a minimum inhibitory concentration (MIC) ranging from 32 to 128 μg mL-1. Furthermore, FF clearly reversed the high-level erythromycin and lincomycin resistance of Propionibacterium acnes. The MIC values of erythromycin against P. acnes were dramatically reduced from 2,048 to 1.0 μg mL-1 in combination with MIC of FF (64 μg mL-1). The fractional inhibitory concentration indices of erythromycin and lincomycin were measured from 0.500 to 0.751 in combination with 32 or 64 μg mL-1 of FF against all tested P. acnes strains, suggesting that FF-erythromycin and FF-lincomycin combinations exert a weak synergistic effect against P. acnes. The results of this study suggest that the compounds derived from E. bicyclis can be a potential source of natural antibacterial agents and a pharmaceutical component against acnerelated bacteria.
이정하,임수정,반효경,Jeongha Lee,Soojung Lim,Hyokyung Bahn 한국인터넷방송통신학회 2024 한국인터넷방송통신학회 논문지 Vol.24 No.4
최근 인공지능 기술의 발전으로 모바일 환경에서 AI 응용을 수행하는 사례가 늘고 있다. 하지만, 모바일 환경은 데스크탑이나 서버에 비해 자원이 제한적이므로 인공지능 워크로드를 모바일에서 효율적으로 수행하기 위한 연구가 최근 주목받고 있다. 대부분의 연구는 컴퓨팅 자원의 제약을 해소하기 위한 엣지 또는 클라우드로의 오프로딩에 초점이 맞추어져 있으며, 스토리지 접근과 관련한 파일 입출력 특성에 관한 연구는 아직까지 널리 이루어지지 않고 있다. 본 논문에서는 모바일 환경에서 딥러닝 애플리케이션의 실행 시 발생하는 파일 입출력 트레이스를 분석하고, 기존 모바일 워크로드와의 차이점에 대해 분석한다. 본 논문의 분석 결과가 딥러닝의 파일 접근 특성을 고려하여 미래의 스마트폰 시스템 소프트웨어를 효율적으로 설계하는 데에 활용되기를 기대한다. Recent advancements in artificial intelligence (AI) technology have led to an increase in the implementation of AI applications in mobile environments. However, due to the limited resources in mobile devices compared to desktops and servers, there is growing interest in research aimed at efficiently executing AI workloads on mobile platforms. While most studies focus on offloading to edge or cloud solutions to mitigate computing resource constraints, research on the characteristics of file I/O related to storage access in mobile settings remains underexplored. This paper analyzes file I/O traces generated during the execution of deep learning applications in mobile environments and investigates how they differ from traditional mobile workloads. We anticipate that the findings of this study will be utilized to design future smartphone system software more efficiently, considering the file access characteristics of deep learning.
Effects of Ginsenosides and Their Metabolites on Voltage-dependent Ca2+ Channel Subtypes
Jun-Ho Lee,Sang Min Jeong,Jong-Hoon Kim,Byung-Hwan Lee,In-Soo Yoon,Joon-Hee Lee,Sun-Hye Choi,Sang-Mok Lee,Yong-Sun Park,이정하,Sung Soo Kim,Hyoung-Chun Kim,Boo-Yong Lee,Seung-Yeol Nah 한국분자세포생물학회 2006 Molecules and cells Vol.21 No.1
In previous reports we demonstrated that ginsenosides, active ingredients of Panax ginseng, affect some subsets of voltage-dependent Ca2+ channels in neuronal cells expressed in Xenopus laevis oocytes. However, the major component(s) of ginseng that affect cloned Ca2+ channel subtypes such as α1C (L)-, α1B (N)-, α1A (P/Q)-, α1E (R)- and α1G (T) have not been identified. Here, we used the two-microelectrode voltage clamp technique to characterize the effects of ginsenosides and ginsenoside metabolites on Ba2+ currents (IBa) in Xenopus oocytes expressing five different Ca2+ channel subtypes. Exposure to ginseng total saponins (GTS) induced voltage-dependent, dose-dependent and reversible inhibition of the five channel subtypes, with particularly strong inhibition of the α1G-type. Of the various ginsenosides, Rb1, Rc, Re, Rf, Rg1, Rg3, and Rh2, ginsenoside Rg3 also inhibited all five channel subtypes and ginsenoside Rh2 had most effect on the α1C- and α1E-type Ca2+ channels. Compound K (CK), a protopanaxadiol ginsenoside metabolite, strongly inhibited only the α1G-type of Ca2+ channel, whereas M4, a protopanaxatriol ginsenoside metabolite, had almost no effect on any of the channels. Rg3, Rh2, and CK shifted the steady-state activation curves but not the inactivation curves in the depolarizing direction in the α1B- and α1A-types. These results reveal that Rg3, Rh2 and CK are the major inhibitors of Ca2+ channels in Panax ginseng, and that they show some Ca2+ channel selectivity.
맵리듀스의 데이터 로컬리티 향상을 위한 데이터 복제기법
이정하(Jungha Lee),유헌창(Heonchang Yu),이은영(Eunyoung Lee) 한국정보과학회 2012 한국정보과학회 학술발표논문집 Vol.39 No.1A
인터넷 활용과 웹 어플리케이션의 개발이 증가함에 따라 처리해야하는 데이터의 양도 또한 증가하고 있다. 대량의 데이터를 효과적으로 처리하기 위한 방법 중하나로 병렬처리 프로그램 모델인 맵리듀스가 있다. 하둡은 맵리듀스의 오픈소스 구현으로 대량의 데이터를 병렬로 처리하는 무료 자바 소프트웨어 프레임워크이다. 분산 파일 시스템을 사용하는 하둡에서는 처리하는 데이터가 다르 노드에 위치하는 데이터 로컬리티 문제가 전체 작업 수행시간의 증가를 야기하는 문제가 있다. 본 논문에서는 하둡에서의 데이터 로컬리티 문제를 해결하기 위한 데이토 복제기법을 제안한다. 제안하는 데이터 복제기법에서는 1) 라그랑지 보간법을 사용하여 과거 접근수를 이용한 미래 접근수를 예측하고, 2) 예측된 값을 Threshold값으로 설정하고, 3) 데이터 로컬리티 문제가 발생하였을 때, 복제사본을 생성할 것인지 캐시를 생성할 것인지를 결정하여 복제 사본의 수를 최적화 한다. 실험을 통해 단순히 복제사본 수를 증가시킴으로써 데이터 로컬리티를 향상을 이루어도 작업 완료시간이 감소하는 것이 아니라는 결과를 볼 수 있었고, 오버 런치로 인한 작업 완료시간 증가를 줄이기 위해 데이토 복제사본 수 최적화의 필요성을 확인할 수 있었다.