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세포화학적 방법을 이용한 남해안 조간대에 서식하는 참굴(Crassostrea gigas) 소화맹낭 세포 내 리소솜 활동 측정에 관한 연구
정희도,이지연,홍현기,강현실,김영옥,최광식 한국해양과학기술원 2012 Ocean and Polar Research Vol.34 No.2
Digestive cells of the bivalves have a highly developed lysosomal system and the system is known to be sensitive to changes in environmental qualities. In this study, we measured lysosomal responses of the digestive cells in wild oyster, Crassostrea gigas using frozen section. Oysters were collected in June 2010 from intertidal areas in the inner and outer bay of Gwangyang off the south coast of Korea. From the tissue sections, we measured the digestive cell lysosomal membrane stability (LMS), level of neutral lipids (NL), lipofuscin (LF) and the digestive gland atrophy (DGA). The DGA and condition index of oysters from the inner bay were significantly lower (P<0.05). The statistical test indicated that LMS levels of oysters in the inner bay and the outer bay were not significantly different since a shorter activity was displayed by oysters from the inner bay than that of oysters in outer bay. The LF deposition level of the oysters in the inner bay displayed significantly higher levels than the outer bay (P<0.05). In contrast, the NL accumulation measured from oysters in outer bay was significantly higher than the level observed in the inner bay (P<0.05). Different levels of DGA and LF that were observed in the inner and outer bays were thought to be associated to different level of environmental contamination and these two assays are considered to be good biomarkers.
역추적 시스토릭 어레이 구조 비터비 복호기의 상위 수준 합성
정희도,김종태 성균관대학교 1997 학술회의지원논문목록집 Vol.1997 No.-
이 논문에서는 비터비 알고리즘 방식의 복호기를 설계함에 있어 파이프라인 구조의 상위 수준 합성 방식을 통해서 설계영역을 효율적으로 탐사하여 설계자의 목표와 제약조건을 만족시키는 최적의 설계를 찾는 도구를 제시한다. 이 도구는 길쌈 부호기의 레지스터 갯수, 부호율, 역추적 깊이 등을 입력 받아서 이에 적합한 비터비 복호기의 데이터 흐름도를 생성하고, 이것으로부터 제약조건과 설계 목표를 만족시키는 비터비 복호기의 합성결과를 출력한다.
역추적 시스토릭 어레이 구조 비터비 복호기의 파이프라인 합성
정희도,김종태 대한전자공학회 1998 電子工學會論文誌, C Vol.c35 No.3
This paper presents a pipeline high-level synthesis tool for designing trace-back systolic array viterbi decoder. It consists of a dta flow graph(DFG) generator and a pipeline data path synthesis tool. First, the DFG of the vitrebi decoder is generated in the from of VHDL netlist. The inputs to the DFG generator are parameters of the convolution encoder. Next, the pipeline scheduling and allocationare performed. The synthesis tool explores the design space efficiently, synthesizes various designs which meet the given constraints, and choose the best one.
산란기 지중해담치 Mytilus galloprovincialis의 조직병리학적 변화 관찰
정희도,이지연,Yanin Limpanont,박경일,강현실,김철원,김형섭,최광식 한국해양과학기술원 2014 Ocean and Polar Research Vol.36 No.2
Sessile marine bivalves including mussels, oysters and clams are often used as a sentinel species in coastal environmental monitoring since changes in the environmental quality are often well preserved in their tissues and shells. In this study, we investigated overall health condition of the Mediterranean Mussel, Mytilus galloprovincialis on the south coast using histology. Reproductive condition as gonad index (GI), condition index (CI) as a ratio of the tissue weight to the shell weight, digestive gland atrophy (DGA), types of parasites, and pathologic conditions including erosion, necrosis, hemocyte infiltration, and neoplasia were examined from each histological preparation. GI decreased from March to July then increased from July to September and spawning mussel could be observed as early as in April and the activity continued until September. CI also followed the monthly changes in GI, indicating that decrease in CI was associated with the weight loss due to spawning. DGA increased from March to June, decreased in July and increased from July to September. High DGA values observed in June and September were coincided with spawning and high water temperature. Histology also showed high prevalence of erosion in the digestive gland in June (36.0%) and September (56.4%), suggesting that high water temperature and spawning acted as environmental stressors. No parasitic organism was identified during the survey, although some symbiotic copepods were observed. Histology was found to be useful and affordable technique in monitoring the overall health of mussel, providing useful pathologic information of the cells and tissues.
전기차 배터리의 히트 싱크 유무에 따른 냉각성능에 관한 연구
정희도,김건형,박찬우,이동렬 한국기계기술학회 2016 한국기계기술학회지 Vol.18 No.6
Recently, as demand for Electric Car has been increasing, it has been a main factor that maximizing performance and ensuring the stability of the Electric Car battery to increase the reliability of Electric Car. Above all the study on thermal control in a big influence on the performance and battery life is growing in parallel. This study has compared cooling effect of an Electric Car battery between battery with Heat Sink and without Heat Sink for optimum design of Electric Car battery. Battery is simply modeled into four cells, divided into two cases of battery with Heat Sink that attached on the cell's side and without Heat Sink. And this research was conducted on forced convection. The battery which is designed by this way was numerically analyzed by CFX 14.5. Numerical results, revealed that the battery with Heat Sink was superior in terms of cooling effect. According to the numerical analysis by battery cell's temperature variations, the battery with Heat Sink turned out to be superior in cooling effect to the battery without Heat Sink.
정희지 ( Hee-ji Jung ),김광태 ( Kwang-tae Kim ),조동식 ( Dongsik Jo ) 한국정보처리학회 2019 한국정보처리학회 학술대회논문집 Vol.26 No.2
타워크레인은 조선, 건설 등 산업 현장에서 중량물 운반 운전을 위한 도구로 사람이 수동 작업으로 대부분 수행된다. 이러한 타워크레인 운전 훈련 과정은 훈련 실습자에게 장시간 교육하기에 비효율적 뿐 아니라 위험한 작업이므로 최근에는 가상 훈련 시뮬레이션을 통해 이루어 지고 있다. 이러한 가상 타워크레인 시뮬레이션을 구현하기 위해서는 기후환경, 중량물, 줄걸이와 같은 외부적 요인도 중요하지만 타워크레인의 운반 중량물과 직접적으로 연결이되는 로프를 정밀하게 표현하는 것이 중요하다. 하지만, 현재 개발된 대다수의 로프는 단면이 원통형을 띄고 있어 물리적인 요인이 작용하였을 때, 회전축이나 물리적인 형태를 가늠하기가 어렵다. 그러므로, 가상의 타워크레인 시뮬레이션 로프를 실제 타워크레인 슬링벨트와 유사한 면의 형태를 가지고 구축하여 실 환경과 유사한 환경에서 숙련된 타워크레인 시뮬레이션을 훈련하기 위한 로프 시뮬레이션이 필요하다. 따라서, 본 논문에서는 로프 시뮬레이션이 실제와 동일한 형태의 슬링벨트를 제공할 뿐만 아니라 로프의 면 형태 구현하고, 물리시뮬레이션을 통해 로프의 사실적인 움직임을 나타낼 수 있는 가상현실(VR) 기반 훈련 로프 시뮬레이션을 제시한다.
약주(藥酒)를 이용한 항암치료(抗癌治療)에 관한 문헌적(文獻的) 고찰(考察)
정희,강재춘,Jung, Hee,Kang, Jae-Chun 대한암한의학회 1999 大韓癌韓醫學會誌 Vol.5 No.1
Anti-cancer medi-alcohols in oriental herb prescriptions were divided by chef effects. Each medi-alcohols were analyzed and studied abut frequency, character, target, effect. Also, they were divided into the method of making medi-alcohols. The results were summerized as follows. 1. The department of using medi-alcohol in anticancer herbal scriptions were limited in gynecology, dermatology and digestive internal medicine. There were a lot in gynecology. 2. In analysis about medi-alcohols of dermato scriptions by chef effect, the herbs of relieving exterior syndrome were a lot first and the herbs of invigorating-qi were second. 3. In analysis about meld-alcohols of dermato scripions by chef effect, the herbs of promoting blood circulation to remove blood stasis were a lot first and the herbs of invigorating-qi were second. 4. The method of making medi-alcohol was divided into four types ; boiling, making up pills, extration, filtration. I hope that the medi-alcohol will be used as practional references.