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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.
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.
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.
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.
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.
영어 형용사 ‘heavy’와 한국어 형용사 ‘무겁다’의 의미 비교
정희란 새한영어영문학회 2022 새한영어영문학 Vol.64 No.1
This study investigates the meaning of the adjective HEAVY by comparing the English adjective ‘heavy’ and its Korean corresponding expression ‘mugeopda’. To accomplish this goal, the lexical typology presented by François(2008) has been adopted. It introduces the term collexification which refers to instances where two or more functionally different senses are expressed in the same lexical form. This also focuses on the senses of the two adjectives and includes semantic maps, which are comprised of etic grid and emic categorization of the adjectives. The outcomes from the research are as follows; the adjective HEAVY has four core senses, {weight}, {amount}, {burden} and {force}, and each sense is divided into its smaller semantic areas according to the types of noun collocations. For example, {weight} has two areas: <human> and <non-human>, {amount}: <used> and <loaded>, {burden}: <mental> and <disciplinary>, <atmospheric>, and <disease>, {force}: <intensive>. The English adjective ‘heavy’ has all four senses while Korean ‘mugeopda’ has only two senses, {weight} and {burden}. Also, the English adjective ‘heavy’ colexies most of the senses, except for some senses belonging to {weight} and {burden}. For Korean adjective ‘mugeopda’, it does not colexify <texture> in the sense of {weight}.
성요한초제제 임상시험 고찰을 통한 한약기원 항우울제 임상시험 방법론 연구
정희,이지형,장보형,고성규,Jung, Hee,Lee, Ji-Hyung,Jang, Bo-Hyoung,Ko, Seong-Gyu 대한한방내과학회 2007 大韓韓方內科學會誌 Vol.28 No.2
Objectives : This study was undertaken to learn what should be considered in a good clinical trial investigating a herbal medicine as an antidepressant. Methods : Five well-designed clinical trials published from 2000 to 2006 investigating SJWE in depressive disorder were selected. The trials were reviewed and compared in terms of methodology such as trial design, patient selection, efficacy & safety evaluation, and so on. On the basis of this review of the trials and the regulations and guidelines of KFDA, we suggest some points to be considered for a good clinical trial of a herb for depression. Results : Although every trial had its own unique design, procedure, objectives and so on, all trials used randomizing and double blinding methods. If there is no ethical problem, a placebo-controlled design should be considered in a herbal antidepressant clinical trial for depression. Conclusions : Some points to be considered in an optimal & good clinical trial for an antidepressive herbal medicine were suggested as follows: 1) randomizing and double blinding manner is essential, 2) if there is no ethical problem, placebo control design should be considered, 3) the trial period should be 6 weeks, 4) out-patients will be recruited as subjects, 5) investigators will be well-trained psychiatrists or medical doctors, 6) the number of subjects should be calculated by statistical methods, 7) subjects should be diagnosed by DSM-IV criteria, 8) subjects who have current risk of committing suicide should be excluded, etc.