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김홍준 대한설비공학회 1988 대한설비공학회 강연회 및 기타간행물 Vol.- No.-
본 전시동은 전외기, 정풍량방식을 채택한 단일조운과 복수조운으로 구분되며, 에너지 낭비를 최소화하고저 흡입된 외기가 전열교환기를 지나는동안 예열코일에 의하여 給氣溫度를 일정하게 유지시켜주도록 설계되었다. 그리고 충고가 높아 기류의 순환이 원활히 유동되지 않을것을 감안하여 카세트식 팬코일을 설치하여 이 문제를 해결한 이상적인 시스템설계라고 할 수 있다. 특히, 복수조운 시스템에서는 급기닥트측에 설치된 靜壓調節器는 가변익댐퍼를 비례조절하여 급기측 풍량을 일정하게 維持시킨다. 본 용역은 전시동에 시설된 공기 및 물분배계통, 그리고 소음, 진동 등을 검토한후 조기에 문제점을 발견하여 설계자와 시공자에게 이를 시정토록 권고함과 아울러 향후 건물관리에 운용관리비용 절감 및 장비수명의 연장을 도모할 수 있도록 하는데 중점을 두었다. 용역수행결과의 주요사항은 아래와 같이 요약될 수 있다. (1) 공조기의 송풍량은 몇몇 장비를 제외하고는 설계주준보다 높음. (2) 펌프의 유량은 설계수준의 ±5% 범위이며 적절하다고 판단됨. (3) 소음 및 진동은 환경기준치에 부합되나 몇몇 장비는 허용기준치보다 높게 나타남. 용역수행결과 표출된 부분적인 문제점과 특기사항은 아래와 같다. (1) HCC (motor control center)판넬의 주차단기, 보조차단기 및 전자개폐기 고장. (2) 풍량조절댐퍼의 미설치와 댐퍼기능 고장. (3) 용도 및 설계변경에 의한 공기분배의 불균형. (4) 공조기에 사이폰(siphone)관 미설치. (5) FAN HOTOR 베어링, 풀리의 훼손 및 모터정렬의 불안정으로 인한 騷音振動발생.
김홍준,김종배,이우언 대구산업정보대학 2000 논문집 Vol.14 No.2
All indices that are now in use assume normally distributed data, and any use of the indices on non-normal data results in inaccurate capability measurements. In this paper, suggested two general approaches for estimating capability for non-normal distribution, namely, one based on percentiles, the other on the percentage nonconforming. The Pearson system and the Johnson system are selected as the model for non-normal process capability index calculation. Especially, the Johnson system can be used calculate percent out of specification. In this paper, We find a difference the Pearson system than the Johnson system by case study.
마우스 복강대식세포에서 가감공진단(加減拱辰丹)의 항염증 효과
김홍준,김영식,목지예,정승일,황성연,조정근,장선일,Kim, Hong-Jun,Kim, Young-Sik,Mok, Ji-Ye,Jeong, Seung-Il,Hwang, Sung-Yeoun,Cho, Jung-Keun,Jang, Seon-Il 대한한의학방제학회 2011 大韓韓醫學方劑學會誌 Vol.19 No.1
Objectives : In a previous study, we have shown that Gagam-Gongjin-Dan(GGD) has an inhibitory effect on the ovalbumin-induced immune responses and a hepatoprotective effect on actaminophen-induced liver injury in Balb/c Mice. However, the possible anti-inflammatory effect of GGD extract for inflammatory mediators was not reported. Therefore, the purpose of this study was to investigate an inhibitory effects of GGD extract against lipopolysaccharides(LPS) induced inflammatory mediators in mouse peritoneal macrophages. Methods : GGD extract was prepared by extracting with methanol for 7 days. The extract was freeze-dried following filtration through vacuum distillation system. Accumulated nitrite, an oxidative product of nitric oxide(NO), was measured in the culture medium by the Griess reaction. The levels of prostaglandin $E_2(PGE_2)$, interleukin-$1{\beta}$(IL-$1{\beta}$), tumor necrosis factor-${\alpha}$(TNF-${\alpha}$) were measured by enzyme-linked immunosorbent assay. The expressions of inducible nitric oxide synthase (iNOS) and cyclooxygenase-2(COX-2) were measured by Western blot analysis. Results : GGD extract (50-$400\;{\mu}g$/ml) per se had no cytotoxic effect in LPS-stimulated peritoneal macrophages. GGD extract dose-dependently reduced NO, $PGE_2$, IL-$1{\beta}$ and TNF-${\alpha}$ production and COX-2 activity caused by stimulation of LPS. The levels of iNOS and COX-2 protein expressions were markedly suppressed by the treatment with GGD extract in a dose dependent manner. Conclusions : These results suggest that GGD extract has an anti-inflammatory effect against LPS-induced inflammatory mediators in peritoneal macrophages, these properties may contribute to inflammation disease care.
김홍준,김병국 제어·로봇·시스템학회 2017 International Journal of Control, Automation, and Vol.15 No.4
A minimum-energy cornering trajectory planning with self-rotation algorithm is investigated for threewheeledomni-directional mobile robots (TOMRs). First, an generalized minimum-energy point-to-point trajectoryplanning algorithm is studied, which is obtained using Pontryagin’s minimum principle, a practical cost function asthe energy drawn from the batteries to motors, and the accurate TOMR dynamic model including actuator dynamicsand the Coriolis force. By analyzing the co-state equation, the minimum-energy rotational velocity trajectory ispresented in analytic form. Also a novel algorithm for the minimum-energy translational velocity trajectory isinvestigated. Second, the minimum-energy cornering trajectory planning algorithm with self-rotation is developed. Simulation results show that the minimum-energy cornering trajectory can save energy up to 15.20%compared withthe conventional control using trapezoidal velocity profiles, and up to 3.96 % compared with the loss-minimizationcontrol using the armature loss as the cost function. Also a resolved-acceleration controller is implemented to showan actual performance.
김홍준,정승일,이화정,주영승,Kim, Hong-Jun,Jeong, Seung-Il,Lee, Hwa-Jung,Ju, Young-Sung 한국한의학연구원 2006 한국한의학연구원논문집 Vol.12 No.1
치면세균막내의 미생물 중 Streptococcus mutans $N_{AKAI}$는 치면세균막형성에 가장 중요한 역할을 하는 원인균으로 알려져 있으며, Streptococcus mutans $N_{AKAI}$는 치아우식을 일으키는 주요 원인균으로 주목을 받고 있다. Streptococcus mutans $N_{AKAI}$균에 항균효과를 나타내는 화합물 acanthoic acid (AA, $C_{20}H_{30}O_2$)을 Acanthopanax koreanum $N_{AKAI}$의 클로로포롬 추출물에서 각종 컬럼크로마토그래피법으로 추출분리하여 ms, 1H-NMR 그리고 13C-NMR 등을 이용하여 구조를 동정하였다. AA의 Streptococcus mutans $N_{AKAI}$에 대한 최소억제농도(MIC)와 최소살균농도(MBC)를 조사하였으며, 이 때 각각 2와 $4\:{\mu}g/mL$을 나타냈었다. 또한 다른 천연물에서 분리된 화합물인 tanshinone IIA는 8/16\;${\mu}g/mL$, 녹차의 추출물과 eucalyptoi은 $250/500\;{\mu}g/mL$이었다. 그리고 또 다른 치주질환의 원균인 Streptococcus sobrinus $N_{AKAI}$, Streptococcus sanguis $N_{AKAI}$ 및 Streptococcus gordonii $N_{AKAI}$의 최소억제 농도의 범위는 $4{\sim}32\;{\mu}g/mL$이었다. 우리의 연구결과에서 Acanthopanax koreanum $N_{AKAI}$에서 분리한 acanthoic acid 치주질환 원인균들을 억제하는 항균제로의 가능성을 확인하였다. This research was aimed to search for natural antimicrobial agents that are sefe for humans and specific for oral pathogens. Acanthoic was isolated from the chloroform fraction of methanol extract of Acanthopanax koreanum $N_{AKAI}$ and its structure were elucidated by 13-NMR, 1H-NNR and ESIMS. Antibacterial activity of acanthoic acid was investigated by the minimum inhibitory (MIC) and minimun bactericidal (MBC) concentration. MIC/MBC of acanthoic acid against Streptococcus mutans $N_{AKAI}$ causing dental caries was determined to be $2/4\;{\mu}g/mL$, which was much lower than these of other natural antimicrobial agents such as $8/16\;{\mu}g/mL$ of sangurinarine and $250/500\;{\mu}/mL$ of green tea extract, $500/600\;{\mu}g/mL$ of thymol and borneol. Acanthoic and significantly inhibited the growth of other cariogenic bacteria such as Streptococcus sobrinus $N_{AKAI}$ and Streptococcus sanguis $N_{AKAI}$, and Streptococcus gordonii $N_{AKAI}$ in the MIC range of $4{\sim}32\;{\mu}g/mL$. My finding suggests that acanthoic acid could be employed as a potential antibacterial agent for preventing dental caries.