터보 차져와 인터쿨러를 장착한 디젤기관의 시뮬레이션 연구

한영출,백두성,류규현,오용석,박만재 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.4

Studies on the turbocharger itself or various aspects generated from turbocharged engine have been made. However, only a few researches have been made on the performance for the natural aspirated engine equipped with the turbocharger and the intercooler. In this study, the performance prediction program based on turbocharger theory is developed for simu-lation which may reduce the cost and the trial-and-error time. The program is verified with the experimental results for 11,000cc diesel engine with the turbocharger and the intercooler. Also, various factors which are invisible in experiment are predicted using this program.

DOC의 K-7 Mode에 의한 배기가스 저감에 관한 연구

한영출,백두성,오용석,박만재,박귀열,류규현 韓國工作機械學會 2000 한국생산제조학회지 Vol.9 No.3

With the significant growth of the number of vehicles, environmental problems is raised. NOx, SOx, and PM emissions in diesel powered vehicles are larger than that in gasoline, because the development of pollutants reduction techniques has no: been yet achieved. So it is need to develop after-treatment or to convert into alternative fuel to satisfy emission regula-tion. Among the after-treatment systems to reduce the diesel emissions, studies with diesel oxidation catalyst(DOC) are done greatly. In this study using DOC, reduction efficiency with the change of temperature and catalyst loading was calculated through measurements of CO, HC, PM, and SOx.

珪酸 窒素施用量이 稻體無機成分과 收量構成要素에 미치는 影響

卞漢圭,高美錫 慶尙大學校 1985 論文集 Vol.24 No.1

A series of field experiment were conducted to evaluate the effects of silicate fertilizer, mineral contents and nitrogen fertilizer on the yield, its components, and changes of chemical properties of rice plant. The results obtained are summarized as follows: 1. The applications of silicate fertilizer produced number of grains per hill, ripened ratio of grains and 1000-grain weight in the plots silicate applied were higher and heavier than those of the control plot (not silicate applied) in two types of varieties (Japonica and Japonica x Indica). The brown rice yield was increased by 9.3% in the Japonica x Indica variety and 8.2% in the Japonica variety in plots silicate applied compared with those of the control plot. 2. The rice plant in the plot silicate applied contained more T-N and P_2O_5 at the maximum tillering stages, K_2O, CaO and MgO at the heading time, and SiO_2 at the three stages(maximum tillering stages, heading time and harvesting time) than those in the control plot. 3. In the plot silicate applied, positive correlation were recognized between the yield and mineral nutritions, but those in the control were not. 4. When applied more nitrogen fertilizer, the rice plant showed the more SiO_2 contents. 5. The maximum yield showed N12kg/10a in the control and N18kg/10a in the plot silicate applied. 6. The SiO_2 ratio was increased in the plot silicate applied, and decreased outbreak of leaf blast and sheath blight. 7. The optimum levels of nitrogen fertilizer were 14kg/10a in the control, 20kg/10a in the plot silicate applied.

전해환원수 음용이 마우스의 혈액과 장기조직에 미치는 영향

정한석,김동희,윤양숙,등영건,장병수,이규재 韓國電子顯微鏡學會 2008 Applied microscopy Vol.38 No.4

본 연구는 전해환원수 음용에 대한 안전성을 조사하기 위하여 실험동물을 이용하여 사망률 확인, 체중 비교, 혈액의 생화학적 변화, 염증, 면역세포의 비교, 내부 장기의 형태적 변화, 장기의 무게 변화 및 조직학적 검사를 통하여 전해환원수가 생체에 미치는 영향을 확인한 결과 다음과 같은 결론을 얻었다. 전해환원수를 급이한 실험군에서 사망, 행동 및 외형 이상 유무 관찰 결과 아무런 증상이 나타나지 않았으며, 체중은 감소하는 경향을 보였다. 실험군에서 혈액의 생화학적요소인 K^(+), Cl^(-),Ca^(2+), GPT, GOT, CRE 및 ALP에서는 유의한 수준의 변화가 관찰되지 않았으나 Na^(+)와 BUN에서는 실험군이 대조군에 비해 더 감소되었다. 혈액 내 면역세포를 비교한 결과 호염기구, 호산성구 및 단핵구 등은 큰 차이가 없으며, 실험군에서 호중구는 감소하였고, 림프구는 증가하는 경향을 보였다. 또한 위, 소장, 심장 및 간을 조직학적으로 관찰한 결과 모든 장기에서 병리적 이상 소견은 관찰되지 않았다. 따라서 본 연구를 통하여 전해환원수는 생체에서 큰 문제를 유발시키지 않는 안전한 물임을 알 수 있었고 국내에서 전해환원수에 대한 연구가 거의 없는 실정이기 때문에 전해환원수의 안전성을 입증하기 위한 기초자료 마련 및 제공에 의의가 있다고 할 수 있다. The main purpose of this study is to investigate the effects of electrolyzed reduced water (ERW) on blood components and electrolytes, as well as elected tissues on mice. The mice were supplied either tap water (control group) and ERW (experimental group) for two months. There were no significant different between two groups anatomically and physiologically. In the blood electrolyte study, the experimental group had less Na and BUN compared to the control group. In the blood component study, the experimental group had less neutrophiles and the control group had more lymphocytes. In histological study, no tissue changes were noticed in various organs, including the stomach, small intestine, heart, and liver tissues. In conclusion, ERW has no noticable side affects on blood and organ tissues, and might be safe to a living body.

플라즈마를 이용한 유리섬유강화 복합절연재료의 표면처리에 관한 연구

이규철,남창우,김희대,황영한,김경석 울산대학교 1997 공학연구논문집 Vol.28 No.1

본 연구에서는 에폭시계 복합 절연재료 Glass-cloth/Epoxy 의 계면 접착특성을 향상시키기 위하여 표면처리 조건에 따라 각각 복합 절연재료를 제작하였고, 전기·기계적특성의 상관관계를 다음과 같은 실험을 행하여 비교하였다. Glass의 젖음의 정도를 평가하기 위하여 표면처리 조건에 따라 주위온도 80[℃]에서 접촉각을 측정하였고, 주위온도 및 인가전압을 변화시키면서 비유전율(εr), 유전정접(tanδ) 및 전기적 절연강도를 측정하였다. 기계적 특성을 측정한 후에 파단면의 형상을 SEM으로 분석, 검토하였다. 실험 결과, (1) 주위온도가 상승함에 따라 비유전율 및 유전정접은 증가하였고, 전기적 절연강도는 감소하였으며 플라즈마 처리함으로서 전기·기계적특성은 전반적으로 향상되었다. (2) 접촉각 측정 주위온도가 80[℃]일 때, 표면처리 조건에 따른 젖음성은 각각 다르게 나타났고 플라즈마 처리효과는 표면세정, 미세요철, 표면대전 및 젖음성의 감소와 같은 복합효과로 볼 수 있다. (4) 전기·기계적특성의 관점에서 복합 절연재료의 경화온도가 80[℃]일 때, Glass-cloth/Epoxy복합 절연재료의 최적처리시간은 3분 정도로 나타났다. The Glass-cloth/Epoxy composite insulating materials for this study have been prepared with several different surface treatmenttechniquen such as untreatment ultrasonic treatment and plasma treatment, and their electrical and mechanical characteristics have been compared each other. It has been found that plasma-treated glass has the smallest contact angle with a drop of epoxy. The plasma-treated composite materials have superior dielectric strength and mechanical tensile-strength compared to the materials subjected to other surface treatments. Also, the experiment showed that there exists an optimum plasma treatment duration for improving the interfacial characteristics of the composite insulating materials. The optimum plasma treatment durations are about 3 minutes for Glass-cloth/Epoxy at 80[℃]. Longer plasma treatment has been appeared to degrade the interfacial characteristics.

예방접종과 육아수첩에 대한 부모들의 인지도

김한진,위규석,김창휘,신상만,이상주 순천향의학연구소 1995 Journal of Soonchunhyang Medical Science Vol.1 No.1

A study was performed to get some information about the parents' attitudes regarding immunization and immunization record. Five hundred and ninety nine parents who visited to well baby clinics in 4 affiliated hospitals of Soonchunhyang University were randomly selected and requested to fill up the questionnaire. The results were as follows ; 1. A majority of respondants(83.5%) to questionnaires brought the immunization record with their children when immunization. 2. The number of parents who know the primary immunization schedule correctly were 304(50.8%) and majority of the parents misunderstood chicken pox vaccination as primary immunization. 3. About the half of the respondants(49.5%) received immunization by pediatritian. Percentages of the parents who received immunization at regional health care center were 24.1% in Seoul and 42.8% in other cities. 4. Only below half of the respondants(45.7%) thought to be satisfied to physician's information about the side effects of vaccination and 26.9% of the respondants never get the information about any side effects. 5. Many of the respondants(80.6%) thought that there was no or few advantage to immunization by pediatritian. 6. Most of the cases(84.1%) record the immunization status and which were done by nurse(51.4%), physician(27.1%) and parents themselves(21.5%) 7. Only the 21.5% of the respondants received the record of growth and development milestones of their children and 37.7% of the respondants experienced nutritional counseling when vaccination. 8. The reasons of importance of immunization records are for general evaluation of child health since at birth(58.6%) and for not to skip routine vaccination(40.1%).

MIC구형 공진기를 이용한 주파수 스캐닝 안테나

박한규,최평석,양혁재 연세대학교 산업기술연구소 1980 논문집 Vol.12 No.2

마이크로스트립 單一共振器를 直列로 연결한 周波數스캐닝 안테나의 製作 및 動作原理에 대하여 고찰하였다. 마이크로스프립 基板의 두께가 1/32inch(0.8mm)이고 比誘電率 εr=2.45를 사용하였을 경우 8.7㎓에서 9.25㎓까지 周波數를 변환시켰을 때 ±30°로 스캐닝 하였으며 이때 共振器 자체의 反射波에 의한 位相偏移가 30%까지 차지하였다. In this paper, the principles and fabrication of the frequency scanning antenna formed by the cascaded array of single resonators are described. As the microstrip substrate, the depth of 1/32 inch and ?? of 2.45 substrate is used and the resultant beam scan angle is 30° from 8.7 ㎓ to 9.25 ㎓ range. It is showed that this scanning is due to the phase shift in a resonator as well as the transmission line and the resonator phase shift responsible for 30% of the total phase shift. Experimental results shows a little discrepancy from the theoretical value and this considered to come from the mis-matching of each resonators.

LED배열을 이용한 광Vector-Matrix 곱셈에 관한 연구

최평석,박한규 연세대학교 산업기술연구소 1984 논문집 Vol.16 No.2

인코히어런트광은 이용하여 vector-matrix 곱셈기를 LED 배열 및 lens계, mask 등으로 구성하였다. 입력 vector 는 LED 배열로 나타내었으며 matrix 는 mask 상에 면적변조방식으로 부호화 하였다. 곱셈의 결과는 lens계를 통하여 photodiode 배열로 검출하였으며 하나의 채널로 출력을 관찰하기 위해 analog multiplexer를 사용하였다. vector 및 matrix의 원소가 양의 실수 및 복소수일 경우에 대하여 출력파형을 관찰하였으며 특히 복소수 data일 경우 mask 상에 부호화 하는 방법을 제시하였다. The vector-matrix multiplier using incoherent optical illumination is constructed with a LED array, lens system and mask. The input vector is represented by a LED array and the matrix is encoded on a film by the mask modulation method. The result of multiplication is detected by a photodiode array through the lens system, and an analog multiplexer is used for looking at output signal on the channel. When the elements of a vector and matrix are positive number and complex number, the output signal is observed. Finally an encoding method in case of complex data is suggested.

컬러인쇄물의 오류검사 알고리즘 구현에 관한 연구

李揆英,韓熙錫 大田産業大學校 1999 한밭대학교 논문집 Vol.16 No.1

This paper concerned about a study on the Algorithm Realization of Pattern Inspection for Color Printed Stamps. Up to date, the research of color data system in image processing have been studied widely. In this paper, color printed image using input signal in camera by median filtering technique is proposed to decrease noise and distortion in identical condition of input image, and consideration of color printed image characteristics five set of identical block of R, G, B value is extracted and then proposed the method of comparison with normal and abnormal printed color tone with trained learning of the Error Back-Propagation. The network structure induced this paper appropriate for a given problem and a good result is obtained by improve initial condition and adjust the number of hidden layer to solve the problem of real time process, learning and train. In the future, using a “C” language instead of “MATLAB”, a realization of algorithm for any kind of color printed image techniques would be improved and succeeded.

엔지오텐신이 Norepinephrine의 신혈관 반응에 미치는 영향

이석호,김종규,양훈모,민영기,임한혁 순천향의학연구소 1999 Journal of Soonchunhyang Medical Science Vol.5 No.2

To determine the effect of angiotensin Ⅱ(ANG Ⅱ)-induced hypertension on the renal hemodynamic response of norepinephrine(NE), mongrel dog instrumented for checking of renal blood flow(RBF) was followed as the step increases every 2 minutes in the rate of norepinephrine infusion into the renal artery during 5 conditions (C : control, C+PD : control+pressure decompression of aorta, ACEI : angiotensin converting enzyme inhibitor, ACEI+ANG Ⅱ : angiotensin converting enzyme inhibitor+ANG Ⅱ, ACEI+ANG Ⅱ+PD : angiotensin converting enzyme inhibitor+ANG Ⅱ+pressure decompression of aorta) Without relation of increase (C, C+PD) or decrease (ACEI+ANG Ⅱ, ACEI+ANG Ⅱ+PD) of the plasma ANG Ⅱ level when NE is infused into vessel, there were no differences in RBF response to NE infusion between C and C+PD and between ACEI+ANG Ⅱ and ACEI+ANG Ⅱ+PD, which implies that renal arterial pressure(RAP) does not play an important role in controling the renal hemodynamic response to NE. When renin angiotensin system was blocked by captopril without adding to ANG Ⅱ supply (ACEI), RBF can be severe decreased to approximately 90% at much lower rates of NE infusion than occurred when the sufficient concentration of ANG Ⅱ were present in the plasma. As the increased sensitivity of NE did not occur at lower renal arterial pressure, when ANGⅡ was present in the plasma in sufficient concentrations, it seems that protective effect on renal function is possible by ANGⅡ during renal sympathetic stimulation.