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김남형,김남국 제주대학교 해양연구소 1996 해양자원연구소연구보고 Vol.20 No.-
It is important to clarify the collision of water particles which change rapidly due to the time and space. SMAC method modified the original MAC, which is one of the numerical techniques for the handling time dependent variation of fluid flows, is employed. The Navier-Stokes equation for incompressible time-depe-ndent viscous flow is applied and, Also marker particles which move with the fluids are used. The transient aspects can be computed for as much elapsed time as desired. Two-dimensional numerical analysis problems of the collision of water particles are carried out.
김남형,김남국 제주대학교 해양연구소 2000 해양과환경연구소 연구논문집 Vol.24 No.-
SMAC method is, one of the numerical simulation techniques, modified from the original MAC for the time-dependent variation of fluid flows, The Navier-Stokes equation for incompressible time-dependent viscous flow is applied, and also marker particles which move with the fluid are used. Two-dimensional numerical simulations of the collapse of water column are carried out. This paper has shown the very well computation results of the collapse of water column using SMAC method.
김남형,김남국 제주대학교 해양연구소 2000 해양자원연구소연구보고 Vol.24 No.-
SMAC method is, one of the numerical simulation techniques. modified from the original MAC for the time-dependent variation of fluid flows. The Navier-Stokes equation for incompressible time-dependent viscous flow is applied. and also marker particles which move with the fluid are used. Two-dimensional numerical simulations of the collapse of water column are carried out. This paper has shown the very well computation results of the collapse of water column using SMAC method.
배용철,김영진,박국필,김현정,남순현 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.1
The purpose of this study was to investigate the distribution of CGRP immunoreactive nerve fibers in rat squamosomandibular joint with postnatal development. Squamosomandibular joint with adjacent tissue of 8 groups of rats(1,5,10,15,20,25,35-postnatal day and adult groups) were removed en bloc and processed for immunohistochemistry and were subjected to light microscopic examination. The results obtained were as follows; 1. The anterior portion of the articular disk was most densely innervated, followed by the posterior, lateral, and medial portions in each group. 2. Increase of CGRP immunoreactive nerve fibers was evident in 10,15,20 postnatal day groups. 3. Almost no CGRP immunoreactive nerve fibers were observed in articular surface of disk proper, mandibular fossa and condyle head of each group. These result suggest that CGRP immunoreactive nerve fibers increased in synovial membrane and peripheral portion of articular disk during 10-20 postnatal day may play a important role in squamosomandibular joint function after weaning period.
정지영,정경채,김병호,김태준,최종현,박남국 한국공업화학회 2002 응용화학 Vol.6 No.2
An experimental study for the investigation of the sodium-steam reaction phenomena was carried out. No significant aggressive explosion phenomena were observed as compared with that of sodium-water reactions. It was also observed that the rate of increase of reaction temperature decreases with increasing initial temperature of liquid sodium and that the temperature of the target depends upon the flow rate of injected steam.
정지영,어재혁,정경채,김병호,김종만,김태준,박남국 한국공업화학회 2003 응용화학 Vol.7 No.1
Generally, the analysis of a sodium-water reaction (SWR) is classified by two major events. One is the very initial stage of peak pressure and shock wave propagation caused by the reaction itself, and the other is the bulk motion including the mass transfer phase in the quasi-steady state of the reaction period during several second or minute orders after leak initiation. The system dynamic response during a sodium-water reaction event shows very different characteristics between the initial stage and the long-term period. In order to investigate the later phase of a SWR event. the code SELPSTA (Sodium-water reaction Event Later Phase System Transient Analyzer) has been developed and the desing and construction of the test facility has been made.
폴리에스테르 섬유 감량시스템용 프로세서 타이트레이터 개발
조진호,이흥락,이종현,김명남,구성모,김무영,진경찬,유병희,강민수,김국진 경북대학교 센서기술연구소 1993 연차보고서 Vol.1993 No.-
폴리에스테르 섬유 감량시스템의 제어를 위해서는 처리조 내에서 감량되는 섬유가 목표 감량치에 도달했는지를 판단해 주는 장치가 필요하다. 본 연구에서는 가성소다용액의 초농도 및 섬유 감량 정도의 정확한 측정과 감량 종료시간의 산출 및 이에 따른 종료신호를 발생할 수 있는 폴리에스테르 섬유 감량기 전용의 자동적정장치를 개발하였다. To control caustic soda treatment system for the polyester fabric reduction, we need the device to determine that the fabric has been arrived target reduction value. In this study, we develope an automatic process titrator for the caustic soda treatment system. Major functions of the target titrating system are accurate measurements of the caustic soda concentration and then producing the end point signal for caustic soda treatment system.
Kim, Hyun Kuk,Hong, Young Joon,Jeong, Myung Ho,Kim, Weon,Kim, Sung Soo,Ko, Jum Suk,Lee, Min Goo,Sim, Doo Sun,Park, Keun Ho,Yoon, Nam Sik,Yoon, Hyun Ju,Kim, Kye Hun,Park, Hyung Wook,Kim, Ju Han,Ahn, Yo The Korean Association of Internal Medicine 2011 The Korean Journal of Internal Medicine Vol.26 No.1
<P><B>Background/Aims</B></P><P>Carvedilol is an antioxidant that inhibits smooth muscle cell proliferation and migration. The aim of this study was to investigate the beneficial effects of carvedilol-loaded stents on 2-year clinical outcomes after stent implantation in patients with coronary artery disease.</P><P><B>Methods</B></P><P>We performed a prospective trial with male subjects to compare the safety and effects of carvedilol-loaded BiodivYsio® stents implanted into 20 patients with those of bare-metal BiodivYsio® stents implanted into 21 patients for de novo coronary lesions. The primary end point was the degree of neointimal hyperplasia, which was measured by intravascular ultrasound (IVUS) 6 months after the procedure; the secondary end point was major adverse cardiac events (MACE) at 2 years after implantation. All carvedilol and control stents were deployed successfully.</P><P><B>Results</B></P><P>A 2-year follow-up was completed for 19 patients (95%) in the carvedilol stent group and 20 patients (95%) in the control stent group. IVUS showed a trend toward a larger luminal area (6.86 ± 2.59 vs. 5.47 ± 1.52 mm<SUP>2</SUP>, <I>p</I> = 0.267), smaller neointimal area (1.34 ± 0.70 vs. 2.40 ± 1.73 mm<SUP>2</SUP>, <I>p</I> = 0.18), and reduced net decrease in luminal area (-0.78 ± 0.97 vs. -1.89 ± 1.78 mm<SUP>2</SUP>, <I>p</I> = 0.106) in the carvedilol stent group compared with the control stent group, respectively. There were no significant differences in the incidence of MACE (10.5 vs. 30.0%, respectively, <I>p</I> = 0.132) between the groups at 2 years after stent implantation. Stent thrombosis did not occur in either group after 2 years.</P><P><B>Conclusions</B></P><P>The carvedilol-loaded stents tended to inhibit neointimal hyperplasia without the occurrence of cardiac death, myocardial infarction, or stent thrombosis at 2-year follow-up.</P>