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Won, Jong Un,Jeon, Hong Kyu,Kim, Min Joong,Kim, Beak Hyun,Kim, Young Min The Institute of Internet 2022 International Journal of Internet, Broadcasting an Vol.14 No.4
Today, we are exposed to various text-based media such as newspapers, Internet articles, and SNS, and the amount of text data we encounter has increased exponentially due to the recent availability of Internet access using mobile devices such as smartphones. Collecting useful information from a lot of text information is called text analysis, and in order to extract information, it is performed using technologies such as Natural Language Processing (NLP) for processing natural language with the recent development of artificial intelligence. For this purpose, a morpheme analyzer based on everyday language has been disclosed and is being used. Pre-learning language models, which can acquire natural language knowledge through unsupervised learning based on large numbers of corpus, are a very common factor in natural language processing recently, but conventional morpheme analysts are limited in their use in specialized fields. In this paper, as a preliminary work to develop a natural language analysis language model specialized in the railway field, the procedure for construction a corpus specialized in the railway field is presented.
Altered Vascular Calcium Regulation in Hypertension
Won-jae Kim,Jong-un Lee,Yong Hyun Park,Sang Chae Nam 대한생리학회-대한약리학회 1997 The Korean Journal of Physiology & Pharmacology Vol.1 No.5
<P> The present study was aimed at investigating whether the vascular calcium regulation is altered in hypertension. Two-kidney, one clip (2K1C) and deoxycorticosterone acetate (DOCA)-salt hypertension were made in rats, and their thoracic aortae were taken 4 weeks later. The isometric contractile response and calcium uptake of the endothelium-denuded aortic preparations were determined. Caffeine (0.1∼35 mmol/L) induced a greater contraction in 2K1C and DOCA-salt hypertension than in normotensive control. When the vascular calcium store was functionally-depleted by a repeated exposure to caffeine, it took longer to reload the store and to resume the initial contraction force in response to caffeine in both 2K1C and DOCA-salt hypertension. The vascular <SUP>45</SUP>Ca uptake following the functional depletion of the cellular store was also greater in both models of hypertension than in control. Ryanodine, calcium channel activator of the sarcoplasmic reticulum, attenuated the restoration of caffeine-induced vascular contraction, which was not affected by either 2K1C or DOCA-salt hypertension. Nifedipine, an L-type Ca<SUP>2</SUP> channel blocker, attenuated the restoration of caffeine-induced contraction, which was not affected by DOCA-salt hypertension, but was more pronounced in 2K1C hypertension. Nifedipine also diminished the vascular <SUP>45</SUP>Ca uptake, which was not affected by DOCA-salt hypertension, but was more pronounced in 2K1C hypertension. Ouabain, a Na<SUP></SUP>, K<SUP></SUP>-ATPase inhibitor, increased the caffeine-induced contraction by a similar magnitude in control and 2K1C hypertension, which was, however, markedly attenuated in DOCA-salt hypertension. Ouabain enhanced the vascular <SUP>45</SUP>Ca uptake, the degree of which was not affected by 2K1C hypertension, but was markedly attenuated in DOCA-salt hypertension compared with that in control. Cyclopiazonic acid, a selective inhibitor of Ca<SUP>2</SUP>-ATPase of the sarcoplasmic reticulum, attenuated the restoration of caffeine-induced contraction, which was not affected by 2K1C hypertension, but was more marked in DOCA-salt hypertension. These results suggest that the increased vascular calcium storage may be attributed to an enhanced calcium influx in 2K1C hypertension, and to an impaired Na<SUP></SUP>-K<SUP></SUP> pump activity of the cell membrane and subsequently increased calcium pump activity of the cellular store in DOCA-salt hypertension.
( Un Joo Lee ),( Weon Kim ),( Woo Shik Kim ),( Jong Shin Woo ),( Jin Bae Kim ),( Kwon Sam Kim ),( Tae Won Lee ),( Kyung Hwan Jeong ),( Ju Hee Cho ),( Chun Gyoo Ihm ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Patients with ESRD on maintenance hemodialysis are poor responders to clopidogrel. The aim of this study was to assess the functional impact of ticagrelor in end stage renal disease (ESRD) patients receiving maintenance hemodialysis. Methods: In a single-center, prospective, randomized, crossover study, 25 ESRD patients on hemodialysis were assigned to receive ticagrelor (180 mg loading, 90 mg twice daily for maintenance dose) or clopidogrel (300 mg loading, 75 mg once daily for maintenance dose) for 14 days, and after a 14-day washout period, crossover treatment assignment for another 14 days. Platelet function was evaluated before and after antiplatelet therapy via light transmittance aggregometry and VerifyNowTM P2Y12 assay, and genotyping was performed for CYP2C19*2 status. Results: Higher inhibition of platelet aggregation (IPA) at both 5 and 20 μmol/L ADP stimuli occurred with ticagrelor than with clopidogrel at 1, 5, and 48 hours, and 2 weeks after loading (Figure). By 5 hours after loading, a greater proportion of patients in the ticagrelor group than in the clopidogrel group achieved IPA >50% (75% versus 12%, respectively, p < 0.05), and IPA >70% (44% versus 0%, respectively, p < 0.05). The rates (slope) of onset and offset of the antiplatelet effect were faster in patients on ticagrelor than on clopidogrel (P<0.05). Regardless of status of CYP2C19*2 allele, the ticagrelor group showed signifi cantly lower P2Y12 reaction units at all times after loading and during maintenance. Conclusions: Ticagrelor achieved more rapid and greater platelet inhibition than clopidogrel did in ESRD patients on hemodialysis.
( Un Taek Hwang ),( Junsoo Bae ),( Taekyeong Lee ),( Sung-yun Hwang ),( Jong-chan Kim ),( Jinseok Park ),( In-gyu Choi ),( Hyo Won Kwak ),( Sung-wook Hwang ),( Hwanmyeong Yeo ) 한국목재공학회 2021 목재공학 Vol.49 No.3
본 논문에서는 열수 탄화(hydrothermal carbonization)에 의해 제조된 리그닌 하이드로차의 탄화 특성을 조사하였고, 근적외선 분광법과 부분 최소 제곱(partial least squares) 회귀를 이용하여 탄화 거동을 예측하기 위한 모델을 수립하였다. 온도 200℃에서 열수 탄화된 리그닌의 탄소 함량은 무처리 시료 보다 약 3 wt% 높았으며 가열 시간이 증가할수록 탄소 함량도 서서히 증가하는 경향이 나타났다. 열수 탄화는 리그닌을 더욱 탄소 집약적으로 변화시키고 마이크로 파티클을 제거하여 더욱 균질한 특성을 부여하였다. 근적외선 분광법과 부분 최소 제곱 회귀를 이용한 판별 및 예측 모델은 수열 탄화의 적용 여부를 완벽히 구분했으며 높은 정확도로 열수 탄화 리그닌의 탄소 함량을 예측하였다. 본 연구로부터 근적외선 분광법과 결합된 부분 최소 제곱 회귀 모델을 이용하여 열수 탄화에 의해 제조된 리그닌 하이드로차의 탄화 특성을 빠르고 비파괴적으로 예측할 수 있다는 것이 확인되었다.