급속응고된 금속분말의 응고거동 및 제조법에 관한 연구 ( Part 1 : 급속응고 제조법 )

김종윤,윤우영 ( Jong Yoon Kim,Woo Young Yoon ) 한국주조공학회 1995 한국주조공학회지 Vol.15 No.2

New metallic powder making processes, named Centrifugal Emulsification Process(CEP) and Mixer and Settler(MS) have been developed to synthesize rapid solidified metallic powders. Through CEP and MS processings, the high temperature metals as well as the low temperature alloys are manufactured. Also, the effects of rapid solidification on the undercooling, solidification rate and crystallization behaviors can be evaluated effectively through the processes. The standard deviations of the synthesized typical Pb-Sn eutectic powders are 1.63 and 1.51 for CEP and MS respectively, and the average size of the MS powders was 18㎛. The possibility of the customized not only size and shape control but microstructure control was also shown. Both of the new methods can be applied to continuous powder making processes.

한국 및 중국산 산양삼의 중금속 오염도 측정

김종윤,김병우,권기록,Kim, Jong-Yoon,Kim, Byung-Woo,Kwon, Ki-Rok 대한약침학회 2007 Journal of pharmacopuncture Vol.10 No.1

Objectives : Heavy metal contents in cultivated wild ginseng from Korea and China were evaluated for the safety purpose. Methods : Arsenic(As), cadmium(Cd), lead(Pb), mercury(Hg), copper(Cu), chromium(Cr), and selenium(Se) from the root, stem, and leaves of the Korean cultivated wild ginseng and the root of the Chinese cultivated wild ginseng were analyzed for the existence of heavy metal contents. Results : Most of heavy metals weren't detected in all the samples. Copper and lead were found in very minute volume and didn't reach the toxic concentration level of 10mg/kg. Samples used in the test were grown in non-contaminated areas, free from heavy metal contamination. Conclusions : Based on above results, cultivated wild ginseng from Korea and China are relatively safe from the heavy metal exposure. But for more rigorous quality control, an epidemiological survey using the samples from more diverse areas should be conducted.

기능성 소화불량증 환아(患兒)의 위전도에 대한 내소화중탕(內消和中湯)의 효과(效果)

김종윤,이진용,윤상협,Kim, Jong-Yoon,Lee, Jin-Yong,Yoon, Sang-Hyub 대한한방소아과학회 2002 대한한방소아과학회지 Vol.16 No.2

We have surveyed the epidemiology of functional dyspepsia in 7 cases of Children and investigated the therapeutic effect on Functional Dyspepsia following 4 weeks medication of Naesowhajung-tang using Electrogastrogram. The Results were as followings: 1. Sex ratio are 6 males, 1 female; their mean ages, $9.0{\pm}1.41(7-11years)$; length, $137.2{\pm}13.86cm$; body weight, $35.3{\pm}l1.34kg$. 2. Most of subjects have a normal growth state. But one case have severe growth disturbance. Familial tendency for this disease is noted in 85.8%. 3. Abdominal pain was seen in 100% of subjects. The indicated symptom was lowed in order of abdominal pain(100%), nausea vomiting(71.43%), general fatigue(65.34%), vertigo headache(57.14%), belching(55.38%), etc. 4. The EGG finding after treatment was improved in 53%, aggrevated in 43. In cases, postprandial improvement was more remarkable than fasting improvement. Common cold and antibiotics seems to have functioned as an aggrevating factor on gastric motility. From the above results, Naesowhajung-tang seems to have been used in the treatment of functional dyspepsia for children.

우리나라의 임도 발달과정에 관한 고찰

김종윤,이준우 ( Jong Yoon Kim,Joon Woo Lee ) 한국산림경제학회 1993 산림경제연구 Vol.1 No.1

국내 성인환자에서 죽상동맥경화성 심혈관질환 위험도와 스타틴 처방 현황

김종윤,유기연,Kim, Jong Yoon,Rhew, Kiyon 한국임상약학회 2021 한국임상약학회지 Vol.31 No.3

Background: Cardiovascular (CV) disease is known as one of the major causes of death from disease worldwide. Statin therapy plays a pivotal role in atherosclerotic cardiovascular disease (ASCVD) lowering the LDL-cholesterol level effectively. The purpose of this study was to evaluate the association of the intensity of statin therapy in adult patients of Korea and the risk of ASCVD of the patient group. Methods: We used data from sample of patients from the Health Insurance Review and Assessment Service (HIRA-NPS-2018). We analyzed the patterns of prescribing statins including types of statin, statin intensity, and number of patients with ASCVD or risk of ASCVD. Results: 155,512 patients were included in the analysis, and 27,950 patients (18.0%) was over 75 years. High-intensity statin usage was increased in ASCVD patients compared with the low-intensity statin use. The OR (odds ratio) of high-intensity statin were increased in myocardial infarction patients compared with low-intensity statin use showing the highest OR; 12.40 (95% CI; 9.48-16.22). At patient groups of angina, ischemic heart disease and carotid disease, high-intensity statin prescription rate was increased compared with low-intensity statin. However, there was no statistical significance between both statin prescription rates in patients of peripheral arterial disease, abdominal aneurysm, diabetic mellitus and atherosclerosis. Conclusion: The statin prescription rate showed intensity increasing tendency according to the risk of ASCVD. More aggressive statin therapy might be beneficial for the ASCVD patients based on the recent guidelines of dyslipidemia.

현장시험시공을 통한 동전기 그라우팅 공법의 적용성 평가 Ⅰ : 전기비저항 탐사 결과

김종윤(Kim Jong Yun),안동욱(Ahn Dong Wook),강병윤(Kang Byung Yoon),김수삼(Kim Soo Sam) 대한토목학회 2006 대한토목학회 학술대회 Vol.2006 No.10

대심도 터널 화재 시 균일배기 환기방식에서의 최적배연 연구

김종윤(Kim, Jong-Yoon),임경범(Lim, Kyung-Bum),전용한(Jeon, Yong-Han) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.1

본 연구는 대심도 터널에서 화재발생 시 균일배기방식의 경우에 대하여 최적의 배연용량을 산정함으로서 환기설비의 설계기술기준 정립 및 세부설계인자 도출을 위한 기초자료로의 활용을 목적으로 한다. 수치해석은 FDS 프로그램을 사용하 였으며, 대심도 터널 화재 시 비정상유동에 대하여 해석하였다. 화재해석 결과, 터널내부의 풍속이 0 m/s인 경우 배연용량이 80 m3/s로 연기이동거리가 250 m이내로 유지되었으나, 내부풍속이 3.0 m/s인 경우 배연용량이 197.1 m3/s로 약 2.5배 증가되어야 연기이동거리가 250 m 이내로 유지되었다. This study represents the effective fire and smoke control in the case of fire in deep underground tunnels, even if the exhaust system can be calculated, the optimal smoke capacity can be determined by establishing technical standards for the transverse ventilation system focusing on the design as a basis for deriving the parameters for utilization. Numerical analyses were performed using the FDS program as a function of the unsteady flow in a deep underground tunnel fire. The analysis results were calculated within 250 m smoke using an inside wind velocity of 0m/s when the capacity of smoke was exhausted, 80 m3/s, whereas in case of an internal wind velocity of 3m/s, the capacity of smoke exhaust was 197.1m3/s, showing an approximately 2.5 fold increase.

마랑고니 대류에 의한 열전달 촉진기구

김종윤(Jong Yoon Kim),박종화(Jong Hwa Park),최국광(Kook Kwang Choi),이동호(Dong Ho Rie) 대한설비공학회 2000 대한설비공학회 학술발표대회논문집 Vol.2000 No.-

자려식 SVC용 5레벨 인버터의 직류측 콘덴서 전압제어에 관한 연구

김종윤(Jong-Yun Kim),Hedehoro Harada,류승각(Sung-Kak Lyu),오진석(Jin-Suck Oh),김윤식(Yoon-Sik Kim),노창주(Chang-Joo Noh) 대한전기학회 1998 대한전기학회 학술대회 논문집 Vol.1998 No.7

직류철도 회생에너지 저장시스템용 슈퍼커패시터 수명예측

김종윤(Jong-Yoon Kim),박찬흥(Chan-Heung Park),조기현(Kee-Hyun Cho),장수진(Su-Jin Jang),이병국(Byoung-Kuk Lee),원충연(Chung-Yuen Won) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-

Regenerative energy which is generated during brake periods of DC traction might cause malfunction or destruction of rectifier or any other power conversion devices caused the increment of DC line voltage. Regenerative energy storage system using super-capacitor is one of the method to control the DC line voltage safely. And super-capacitor is very important device as energy storage device. Therefore, In this paper, we designed the regenerative energy storage system using super-capacitor and propose the method about predicting the lifetime of super-capacitor established in storage system. According to the this research, we can estimate the proper replacement moment for the existed super-capacitor due to the safety of the system. And improve the reliability of regenerative energy storage system using super-capacitor.