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김신호,정선환,최성대 한국공작기계학회 2007 한국공작기계학회 추계학술대회논문집 Vol.2007 No.-
This study was carried out to develope a flow control system using to supply PR(photo-resist) in the semi-conductor manufacturing process. The features of this system are to be able to measure the high viscosity and micro-flow. To meet above study object some ideas was induced to design a new concept valve with new material, multi-cross wheel, and new sealing method etc.. As the evaluations on the developed micro-flowmeter it was enough satisfied to use at the IT industries such as photo-resist process.
Dual Source CT에서 Coronary검사의 방사선량 비교분석
신용환(Yong Hwan Shin),안병환(Byoung Hwan Ahn),옥승호(Seung Ho Ock),권오성(Oh Sung Kwon),임흥선(Heung Seon IM),김명구(Myeong Goo Kim) 대한CT영상기술학회 2008 대한CT영상기술학회지 Vol.10 No.1
Purpose This Paper compared the Radiation Dose of Dual Source ECG-gating Spiral Scan and ECG-triggered Sequential Scan in coronary CT. and Analysed how much the Radiation dose reduced in sequential scan. Materials and Methods We studied Spiral and Sequential scan in Phantoms and used by Dual source MDCT called Definition. Scan was made as follows;(Spiral scan:Kvp/mAs/Rotation time/Pitch/Scan time/=100/320/0.33/0.28/8.82, Sequential scan: Kvp/mAs/Table feed/Cycle time/Scan time =100/180/20/1.37/8.22). We used ECG Simulator as equipment( NETECH) Contrast media diluted (CM :1, Normal saline:24) An Experimental method compared CIDivol and CIDIDlP with Spiral and Sequential scan and were measured. Qualitive analysis evaluate the CTDIvol, and CTDIDLP, and SNR through ROI analysis. Quantitative analysis evaluate the Uniformity and noise, Preference Results The results obtained as follows; Radiation dose reduced about 28.8% in Sequential scan than Spiral scan. SNR increased in Spiral scan than Sequential scan. The image Qualities with Sequential scan showed better than Spiral scan. Conclusion In conclusion, by comparing the Phantoms image with Spiral scan and Sequential Radiation dose reduced in Sequential scan. If used and selected properly Sequential scan useful clinically applied to the patients with coronary Disease. (Heart Rate <60-65bpm)
연구논문 : 「나노기술개발 촉진법」개정방향에 관한 연구
이동환 ( Dong Hwan Lee ),임정선 ( Jung Sun Lim ),신광민 ( Kwang Min Shin ),윤진선 ( Jin Seon Yoon ),이명수 ( Myoung Soo Lee ),신명숙 ( Myoung Sook Shin ),강상규 ( Sang Gyu Kang ),김제완 ( Je Wan Kim ),신민수 ( Min Soo Shin ),배성 한남대학교 과학기술법연구원 2014 과학기술법연구 Vol.20 No.2
나노기술은 미래 산업의 핵심 기반기술로써, 현 정부가 제시하는 이른바 ‘창조경제론’의 실현에 핵심적인 역할을 할 것으로 기대되고 있다. 그러나 나노기술이 창조경제를 뒷받침하고, 또한 급변하는 세계적 시대상황을 반영하기 위한 법제개선은 이루어지지 않은 실정이다. 따라서 나노기술촉진정책의 시각에서 정부의 정책기조를 분석하고, 이를 실현하기 위한 「나노기술개발 촉진법」 개정방향을 살펴볼 필요가 있다. 본 논문에서는 그 개정 방안으로 첫째, 나노기술개발 촉진법의 목적을 기술혁신ㆍ상용화 및 나노안전까지 포괄할 수 있도록 확대할 것. 둘째, 확대된 나노기술촉진업무의 책임행정조직으로 미래창조과학부의 위상과 책임을 분명히 하고, 정부지원체계도 가능한 범위 내에서 미래창조과학부 중심으로 일원화 할 것. 셋째, 기술혁신과 상용화의 시각에서 혁신과 안전이 상호 기여하는 관계로 나노제품ㆍ나노안전 및 나노안전인증 등과 관련된 주요 법·정의조항들을 보완할 것을 제시한다. Since South Korea first introduced ``NANOTECHNOLOGY DEVELOPMENT PROMOTION ACT`` in 2002, Korean nanotechnology society has witnessed many dramatic changes of technology development and manufacturing environments in domestically as well as globally. As innovation of manufacturing and commercialization of nanotechnology become priority policies and strategies of president Park government, the environmental, health, and safety(EHS) issues are becoming more critical and complicated not only in nano science?technology?industry fields, but also in law society to accelerate the crossing valley of death. This article covers the past, present, and future of nanotechnology legislation in South Korea, focusing on the cooperation?coordination of agencies and nano-safety activities for innovation with commercialization. After brief researches on the president Park government``s new policy?strategy of innovation, and current international issues of nano convergence, the authors suggest an amendment of the current ``NANOTECHNOLOGY DEVELOPMENT PROMOTION ACT`` of 2002 including legal ground for innovation of nano-manufacture, Public Private Partnership, and National Inter-Agency Committee for Coordination of Nanotechnology Policy.
( Seon Ha Baek ),( Ran-hui Cha ),( Shin Wook Kang ),( Cheol Whee Park ),( Dae Ryong Cha ),( Sung Gyun Kim ),( Sun Ae Yoon ),( Sejoong Kim ),( Sang-youb Han ),( Jung Hwan Park ),( Jae Hyun Chang ),( Ch 대한내과학회 2019 The Korean Journal of Internal Medicine Vol.34 No.4
Background/Aims: Patients with chronic kidney disease (CKD) have been found to show markedly increased rates of end-stage renal disease, major adverse cardiovascular and cerebrovascular events (MACCEs), and mortality. Therefore, new biomarkers are required for the early detection of such clinical outcomes in patients with CKD. We aimed to determine whether the level of circulating renalase was associated with CKD progression, MACCEs, and all-cause mortality, using data from a prospective randomized controlled study, Kremezin STudy Against Renal disease progression in Korea (K-STAR; NCT 00860431). Methods: A retrospective analysis of the K-STAR data was performed including 383 patients with CKD (mean age, 56.4 years; male/female, 252/131). We measured circulating renalase levels and examined the effects of these levels on clinical outcomes. Results: The mean level of serum renalase was 75.8 ± 34.8 μg/mL. In the multivariable analysis, lower hemoglobin levels, higher serum creatinine levels, and diabetes mellitus were significantly associated with a higher renalase levels. Over the course of a mean follow-up period of 56 months, 25 deaths and 61 MACCEs occurred. Among 322 patients in whom these outcomes were assessed, 137 adverse renal outcomes occurred after a mean follow-up period of 27.8 months. Each 10- μg/mL increase in serum renalase was associated with significantly greater hazards of all-cause mortality and adverse renal outcomes (hazard ratio [HR] = 1.112, p = 0.049; HR = 1.052, p = 0.045). However, serum renalase level was not associated with the rate of MACCEs in patients with CKD. Conclusions: Our results indicated that circulating renalase might be a predictor of mortality and adverse renal outcomes in patients with CKD.
Improving the Self-starting of a VAWT
Seon-Hwan Cheong,Seong-Dae Choi,Jae-Yul Shon,Alexander Mag-isa,Shin-Ho Kim,Myoung-Su Choi 한국기계가공학회 2006 한국기계가공학회 춘추계학술대회 논문집 Vol.2006 No.-
The inherent problem of a Darrieus wind turbine is its inability to self-start. Usually, a motor is used to provide angular acceleration until lift forces are produced in the airfoil blades or up until the turbine can already sustain its speed on its own. This paper describes a method of improving the self-starting of an H-type Darrieus vertcial axis wind turbine (VAWT) by incorporating a helical Savonius turbine thus utilizing a drag-lift combination. The effect of each turbine in the combination relative to each other is investigated by testing a prototype windmill consisting of three (3) NACA 0015 airfoil combined with a Savonius rotor with a helix angle of 180 degrees and whose swept area equals 30% of the entire turbine.
( Seon Ju Jeong ),( Kye Man Cho ),( Chang Kwon Lee ),( Gyoung Min Kim ),( Jung Hye Shin ),( Jong Sang Kim ),( Jeong Hwan Kim ) 한국미생물 · 생명공학회 2014 Journal of microbiology and biotechnology Vol.24 No.7
The aprE2 gene with its prosequence from Bacillus subtilis CH3-5 was overexpressed in Escherichia coli BL21(DE3) by using plasmid pET26b(+). After IPTG induction, active and mature AprE2 was produced when cells were grown at 20°C, whereas inactive and insoluble enzyme was produced in a large amount when cells were grown at 37°C. The insoluble fraction was resuspended with 6 M guanidine-HCl and dialyzed against 2 M Tris-HCl (pH 7.0) or 0.5 M sodium acetate (pH 7.0) buffer. Then active AprE2 was regenerated and purified by a Ni-NTA column. Purified AprE2 from the soluble fraction had a specific activity of 1,069.4 ± 42.4 U/mg protein, higher than that from the renatured insoluble fraction. However, more active AprE2 was obtained by renaturation of the insoluble fraction. AprE2 was most stable at pH 7 and 40°C, respectively. The fibrinolytic activity of AprE2 was inhibited by PMSF, but not by EDTA and metal ions. AprE2 degraded Aα and Bβ chains of fibrinogen quickly, but not the γ-chain. AprE2 exhibited the highest specificity for N-succinyl-Ala-Ala-Pro-Phe-pNA. The Km and kcat/Km of AprE2 was 0.56 mM and 3.10 × 104 S-1 M-1, respectively.
Shin Ki-Hong,Jung Jae-Won,Chang Ki-Ho,Kim Kyungsik,Jung Woon-Seon,Lee Dong-In,You Cheol-Hwan 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.12
This paper presents the predictive accuracy using two-variate meteorological factors, average temperature and average humidity, in neural network algorithms. We analyze result in fve learning architectures such as the traditional artifcial neural network, deep neural network, and extreme learning machine, long short-term memory, and long-short-term memory with peephole connections, after manipulating the computer simulation. Our neural network modes are trained on the daily time-series dataset during 7 years (from 2014 to 2020). From the trained results for 2500, 5000, and 7500 epochs, we obtain the predicted accuracies of the meteorological factors produced from outputs in ten metropolitan cities (Seoul, Daejeon, Daegu, Busan, Incheon, Gwangju, Pohang, Mokpo, Tongyeong, and Jeonju). The error statistics is found from the result of outputs, and we compare these values to each other after the manipulation of fve neural networks. As using the long-shortterm memory model in testing 1 (the average temperature predicted from the input layer with six input nodes), Tonyeong has the lowest root-mean-squared error (RMSE) value of 0.866 (%) in summer from the computer simulation to predict the temperature. To predict the humidity, the RMSE is shown the lowest value of 5.732 (%), when using the long short-term memory model in summer in Mokpo in testing 2 (the average humidity predicted from the input layer with six input nodes). Particularly, the long short-term memory model is found to be more accurate in forecasting daily levels than other neural network models in temperature and humidity forecastings. Our result may provide a computer simulation basis for the necessity of exploring and developing a novel neural network evaluation method in the future.