http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
김대중,박상태,정재욱,허훈,Kim, Dae-Jung,Park, Sang-Tae,Jeong, Jae-Uk,Heo, Hun 대한기계학회 1999 大韓機械學會論文集A Vol.23 No.11
A Newly proposed control methodology applied to the aeroelastic system experiencing flutter is investigated and its performance is verified experimentally. The flexible cantilever beam slicked with piezofilm sensor and piezoceramic actuator is modelled in physical domain. Dynamic moment equation for the system is derived via Ito's stochastic differential equation and F-P-K equation. Also system's characteristics in stochastic domain is analyzed simultaneously. LQG controller is designed and used in physical and stochastic domain. It is shown experimentally that the vibration of beam is controlled effectively by designed LQG controller in physical domain. By comparing the result with that of LQG controller designed in stochastic domain, it is shown that the new control method, called Heo-stochastic control technique, has better performance as a controller.
One-step synthesis of gene carrier via gamma irradiation and its application in tumor gene therapy
Jeong, Sung In,Park, Seong-Cheol,Park, Sun-Jeong,Kim, Eun-Ji,Heo, Hun,Park, Jong-Seok,Gwon, Hui-Jeong,Lim, Youn-Mook,Jang, Mi-Kyeong DOVE MEDICAL PRESS 2018 INTERNATIONAL JOURNAL OF NANOMEDICINE Vol.13 No.-
<P><B>Introduction</B></P><P>Although numerous studies have been conducted with the aim of developing drug-delivery systems, chemically synthesized gene carriers have shown limited applications in the biomedical fields due to several problems, such as low-grafting yields, undesirable reactions, difficulties in controlling the reactions, and high-cost production owing to multi-step manufacturing processes.</P><P><B>Materials and methods</B></P><P>We developed a 1-step synthesis process to produce 2-aminoethyl methacrylate-grafted water-soluble chitosan (AEMA-g-WSC) as a gene carrier, using gamma irradiation for simultaneous synthesis and sterilization, but no catalysts or photoinitiators. We analyzed the AEMA graft site on WSC using 2-dimensional nuclear magnetic resonance spectroscopy (2D NMR; 1H and 13C NMR), and assayed gene transfection effects in vitro and in vivo.</P><P><B>Results</B></P><P>We revealed selective grafting of AEMA onto C6-OH groups of WSC. AEMA-g-WSC effectively condensed plasmid DNA to form polyplexes in the size range of 170 to 282 nm. AEMA-g-WSC polyplexes in combination with psi-hBCL2 (a vector expressing short hairpin RNA against <I>BCL2</I> mRNA) inhibited tumor cell proliferation and tumor growth in vitro and in vivo, respectively, by inducing apoptosis.</P><P><B>Conclusion</B></P><P>The simple grafting process mediated via gamma irradiation is a promising method for synthesizing gene carriers.</P>
A Simulator for Calculating Normal Induced Voltage on Communication Line
Jeong-Yong Heo,Hun-Chul Seo,Soon-Jeong Lee,Yoon Sang Kim,Chul-Hwan Kim 대한전기학회 2014 Journal of Electrical Engineering & Technology Vol.9 No.4
The current flowing through the overhead transmission lines causes induced voltage on the communication lines, which can be prevented by calculating the induced voltage at the planning stage for overhead transmission line installment through an agreement between the communication and electric power companies. The procedures to calculate the induced voltages, however, are complicated due to the variety of parameters and tower types of the overhead transmission lines. The difficulty necessitates the development of a simulator to measure the induced voltage on the communication lines. This paper presents two simulators developed for this purpose; one using the Data Base (DB) index method and the other using the Graphic User Interface (GUI) method. The simulators described in this paper have been implemented by the EMTP (Electromagnetic Transient Program).
Effect of the Absence of Heat Shock Protein 70.1 (hsp70.1) on Retinal Photic Injury
Jeong Hun Kim,Young Suk Yu,Hum Chung,Jang Won Heo,Jeong Sun Seo 대한안과학회 2003 Korean Journal of Ophthalmology Vol.17 No.1
This study aimed to evaluate the protective effect of heat shock protein70 (hsp70) on retinal photic injuries, and to determine the relationship between hsp70s from hsp70.1 and 70.3. C57BL/6 wild type (hsp70.1+/+) and knockout type (hsp70.1-/-) mice from the same littermates were placed in light of 11000 lux for 6 hours, and were sacrificed at 1, 4, 7, and 14 days after stress. H & E staining, immunohistochemistry, and western blot analysis were performed. The hsp70.1-/- mice exhibited more disarranged and more diffusely destroyed photoreceptors than the hsp70.1+/+ mice. Hsp70 induction by light in both the hsp70.1 +/+ and hsp70.1 -/- mice peaked at 1 day after light stress. The Hsp70 level in the hsp70.1 +/+ mice reduced slowly and was almost constant for 7 days. However, in the hsp70.1 -/- mice, it decreased rapidly and returned, after 7 days, to a similar level to that prior to light exposure. According to which gene they originate from, hsp70s may play specific roles in protecting the retina against stresses. Hsp70 from the hsp70.1 gene may act as a sustained responder to retinal photic injury.
Immunoreactivity of Constitutive and Inducible Heat Shock Protein 70 in Human Fetal Retina
Jeong Hun Kim,Young Suk Yu,Jin Hyoung Kim,Yu Jeong Kim,Jang Won Heo,Chong Jai Kim 대한안과학회 2003 Korean Journal of Ophthalmology Vol.17 No.1
The purpose of this study was to measure the level of expression of the inducible heat shock protein70 (Hsp70), the constitutive heat shock protein70 (Hsc70) in the outer nuclear layer and the photoreceptors in the human fetal retina. Fetal eyeballs were selected from fetal autopsy specimens of 12 and 17 to 40 week old fetuses, with no history of congenital anomalies. The retinas had differentiated from neuroblastic cells, into matured sensory retinas, from a gestational age (GA) from 12 to 36 weeks. The Hsp70 and Hsc70 were prominently expressed in the nuclear layers. The Hsc70 was expressed at all GAs and the Hsp70 was expressed from 20 to 33 weeks GA. This period is in accordance with the maturation of the sensory retina. The expression of heat shock protein may be regulated by the development of the fetus, and play an important role in the ocular development.
A Simulator for Calculating Normal Induced Voltage on Communication Line
Heo, Jeong-Yong,Seo, Hun-Chul,Lee, Soon-Jeong,Kim, Yoon Sang,Kim, Chul-Hwan The Korean Institute of Electrical Engineers 2014 Journal of Electrical Engineering & Technology Vol.9 No.4
The current flowing through the overhead transmission lines causes induced voltage on the communication lines, which can be prevented by calculating the induced voltage at the planning stage for overhead transmission line installment through an agreement between the communication and electric power companies. The procedures to calculate the induced voltages, however, are complicated due to the variety of parameters and tower types of the overhead transmission lines. The difficulty necessitates the development of a simulator to measure the induced voltage on the communication lines. This paper presents two simulators developed for this purpose; one using the Data Base (DB) index method and the other using the Graphic User Interface (GUI) method. The simulators described in this paper have been implemented by the EMTP (Electromagnetic Transient Program).
광질 및 배양액 제어가 인공광 식물공장내 상추 실생묘의 생장에 미치는 영향
허정욱 ( Jeong-wook Heo ),박경훈 ( Kyeong Hun Park ),박찬흠 ( Chan Heum Park ),홍승길 ( Seung Gil Hong ),백정현 ( Jeong Hyun Baek ),이재수 ( Jae Su Lee ),이공인 ( Gong In Lee ),김승희 ( Seoung Hee Kim ) 한국농업기계학회 2019 한국농업기계학회 학술발표논문집 Vol.24 No.1
본 연구에서는 인공광이나 자연광 시설재배지에서 대량 발생하는 폐기 농업부산물을 활용하여 유기배양액을 제조하고 이를 인공광 식물공장 조건에서 작물 수경재배를 위한 배양액으로 이용하기 위하여 관행의 무기배양액과 혼용 또는 단용 처리한 후 상추 실생묘의 생장에 미치는 영향을 검토하였다. 토마토 폐과(TJ)와 케일(K) 부산물을 활용하여 유기 배양액을 제조하였으며, 이들 배양액의 영향을 비교하기 위하여 인공광 식물공장에서 일반적으로 사용되고 있는 Yamazaki 잎상추액(Y)을 대조구로 설정하였다. 이들 유·무기 배양액을 혼용(YTJ, YK) 또는 단용하여 적치마와 청치마 상추(Lactuca sativa L.)를 35일간 재배하였다. 광원은 광강도가 150 μmol m<sup>-2</sup> s<sup>-1</sup>로 제어된 형광등과 적, 청 및 백색의 LED (Light-Emitting Diode)를 2:1:1로 혼합한 LED광원을 이용하였다. 유·무기 배양액 및 조사광질은 상추 실생묘의 전개엽수에 유의한 영향을 미치는 것으로 나타났는데, 청치마에서는 케일 및 무기배양액과 혼용시 혼합광질보다 형광등 조사시 10매 이상 증가하였고 청치마 생체중은 형광등 대비 LED 조사시 15%, 대조구인 관행 무기배양액 처리구에서도 LED 조사구에서 형광등 대비 15% 증가하였다. 혼합LED를 조사한 실생묘 엽내 SPAD치는 적치마에 비해 청치마에서 높았으며, 대조구 대비 특정 유기배양액 단용이나 관행 무기배양액과의 혼용에 의해 증가하는 것으로 나타났다. 본 실험조건에서는 시설재배지나 노지에서 주로 이용하는 수경재배용 유기 배양액을 인공광 식물공장에서 단용 또는 관행 무기배양액과 혼용하여 상추 실생묘를 수경재배하였는데, 이상과 같이 유기배양액을 활용한 수경재배는 농업부산물의 활용도 제고는 물론 관행의 무기배양액 시용량 저감 및 폐배양액에 의한 환경오염 경감 등의 효과가 기대되지만 단용처리에 의한 작물의 양적생장 저하에 대한 문제점이 제기되기도 하였다. 따라서 무기성분의 배양액 사용량을 저감하면서 작물의 양적생장을 촉진할 수 있는 유기 배양액내 질소성분 증량 및 배양액 흡수패턴을 고려한 시용방법 등에 대한 연구가 필요할 것으로 판단된다.