음식물류폐기물 및 배출폐수의 특성

김영권,김세미,김민규,최진택,남세용,Kim, Young-Kwon,Kim, Se-Mi,Kim, Min-Kyu,Choi, Jin-Taek,Nam, Se-Yong 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.6

Waste generation was generally expected to steadily rise due to a rapid increase in population and economic growth. However, regulations on disposable goods and a volume-based waste fee system have led to a gradual reduction in the amount of waste. In the case of food waste, separation of food waste from other waste has been put in place since direct landfilling was banned in January 2005. The predicted generation amounts of food waste and wastewater in the model city were 54 ton/d and 127.3 ton/d by year 2020, respectively. However, appropriate treatment technologies for food waste and wastewater discharged from food waste treatment processes are yet to be established. In this study, the food waste and wastewater discharged from food waste treatment process in the model city were characterized by literal and field investigation.

Oscillometric Method를 이용한 맥파속도 측정: Tonometric Method와의 비교

김영권 ( Young Kwon Kim ),이명용 ( Myoung Yong Lee ),이무용 ( Moo Yong Rhee ) 대한내과학회 2004 대한내과학회지 Vol.67 No.6

Background : We compared brachial-ankle pulse wave velocity (baPWV) measured by a simple oscillometric method with heart-carotid (hc) and heart-femoral (hf) PWVs measured by a conventional tonometic method. Methods : Using an automatic waveform analyzer,

Isoproterenol 정주에 의한 심박수의 변화가 고혈압 환자의 대동맥 경직도에 미치는 영향

이무용 ( Moo Yong Rhee ),권나영 ( Na Young Kwon ),김재덕 ( Jae Deok Kim ),송승호 ( Seung Ho Song ),윤영원 ( Young Won Yoon ),이명용 ( Myoung Yong Lee ),김영권 ( Young Kwon Kim ) 대한내과학회 2003 대한내과학회지 Vol.64 No.1

Background : Increased aortic stiffness (AS) is an independent risk factor of cardiovascular disease in patients with hypertension. Elevation of blood pressure (BP) or sympathetic tone increases AS. It was reported that acute changes in heart rate by arti

Report of Salvage Procedures in Failed Total Hip Replacement

Kim Young Yong(김영용),Bae Dae Kyung(배대경),Ahn Jae Whan(안제환),Park Dong Wook(박동욱),Choi Kyoung-Yul(최경열),Kim Young Kwon(김영권),Kwak Byung Man(곽병만),Lee Sang Wan(이상완),Ko Chul Un(고철언),Park Shin Chul(박신철) 대한정형외과학회 1980 대한정형외과학회지 Vol.15 No.2

ATM 망에서 뉴럴 네트워크를 이용한 적응 폭주제어

이용일,김영권,Lee, Yong-Il,Kim, Yung-Kwon 한국전기전자학회 1998 전기전자학회논문지 Vol.2 No.1

Because of the statistical fluctuations and the high 'time-variability' nature of the traffic, managing the resources of the network require highly dynamic techniques with minimal Intervention and reaction times, and adaptive and learning capabilities. The neural networks normalizes the ATM cell arrival rate and queue length and has the adaptive learning algorithm, and experimentally investigated the method to prevent the congestion generated in ATM networks. 트래픽의 통계적 변동과 고도의 시변 특성 때문에, 최소의 반응시간을 가지고 고도의 동적인 기술과 적응 그리고 학습능력을 요구하는 네트워크의 자원으로 관리하도록 한다. 뉴럴 네트워크는 ATM 셀 도착율과 큐 길이를 정규화시키며, 그것은 적응 학습 알고리즘을 가지고, ATM 네트워크에서 발생되는 특주를 방지하기 위한 방법을 연구한다.

자연발증 고혈압쥐의 신장과 심장에서의 아포프토시스에 대한 비교 연구

김용진(Yong Jin Kim),윤성철(Sung Chul Yun),김영권(Young Kwon Kim) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.3

N/A Backgronnd: The terminal features of hypertensive target organ damage include decrease in the kidney size and increase in the heart size and wall thickness. Increased apoptosis has been known in the hypertensive nephrosclerosis and in the hypertensive heart failure. We hypothesized that apoptosis may progress by different degrees in the kidneys and heart with hypertension being sustained. To test this hypothesis we examined apoptosis in the kidneys and hearts of spontaneously hypertensive rats(SHR) of various ages. In addition, we examined histopathology of the kidneys. Methods: The kidneys and hearts of 19 SHR were excised at the age of 16 weeks(n=4), 20 weeks (n=6), and 32 weeks(n=9). Sprague-Dawley rats(SDR, n=6) were also sacrificed at the age of 16-24 weeks. Degree of apoptosis was evaluated semi-quantitati-vely by counting the number of apoptotic nuclei, stained by TUNEL method, per high power field(x400). Light microscopic and electron microscopic examination of the kidneys were performed. Results: 1) In SHR kidneys, the number of apoptotic nuclei at the age of 16 weeks was similar to that in SDR kidneys(9.3±0.5 vs. 10.2±2.2, p=NS). However, the number was significantly, p<0.05, increased at the ages of 20 weeks and 32 weeks(31.5±4.4 and 34.1±4.0, respectively) as compared with that in SHR kidneys at the age of 16 weeks and that in SDH kidneys. 2) In SHR hearts, the number of apoptotic nuclei at the ages of 16, 20, and 32 weeks(4.0±1,2, 2.0±0.7, 1.9±0.4, respectively) was neither changed nor different significantly from that in SDR hearts(0.70.5, p=N5), although the heart of SHR was hypertrophied at the age of 32 weeks. 3) Apoptosis was detected most frequently in the outer medulla of the kidneys in SHB. Histopathologic findings were the segmented sclerosis of glomeruli (1/25-50 glomeruli), edema, vacuolization and decreased villi of tubular epithelial cells. The older the age of SHR was, the more severe histopathologic changes were found. Conclusion : The sustained hypertansion caused increased apoptosis in the kidneys but no increased apoptosis in the heart of SHR during the specified ages of our study. The longer the duration of hyper- tension was, the more apoptotic cells and the more severe histopathologic changes, mainly in the tubulo-interstitial area, were found in the kidneys. The most frequent site of apoptosis was the outer medulla. It is suggested that apoptosis in the kidneys begin earlier than that in the heart in hypertensive target organ damage.

광통신용 테이퍼 방향성 결합기의 설계 특성

손석용,호광춘,김영권,Son, Seock-Yong,Ho, Kwang-Chun,Kim, Yung-Kwon 대한전자공학회 1999 電子工學會論文誌, D Vol.d36 No.11

최근, 유사 빔 전파방법이나 비 직교성 결합모드이론과 같은 다양한 근시적 해석법들이 중첩모드에 기초한 테이퍼 방향성 결합기의 그 광학적 특성을 분석하기 위하여 제안되어 왔다. 비록, 이들 접근 방식들이 특별한 구조에서 충분히 정확한 결과들을 제공하지만 테이퍼 전송 구조와 같은 민감한 광 소자 해석에는 불충분하다. 이를 위하여, 우리는 그 방향성 결합기의 전력전송을 정확하게 해석하기 위하여 새롭게 발전된 모드 전송선로, 해석법을 소개하고 이용하고자 한다. 이를 이용한 수치 해석 결과 대칭인 두 테이퍼 채널의 간격이 증가함에 따라 우/기 모드의 전파상수는 하나의 값으로 수렴하였다. 더욱이, 테이퍼 각도가 ${\theta}=0.1^{\circ}$일 때 하나의 전송 채널을 통하여 입사된 모드의 97%가 다른 전송 채널로 전송되었고, 그 기운 각도가 증가함에 따라 전력 전송은 현저하게 감소하였다. Recently, various simplified simulation techniques such as firite-difference beam propagation method and non-orthogonal coupled-mode theory have proposed to analyze the optical characteristics of tapered directional couplers supported by the coupling of two propagating modes. Although these approaches are often in sufficiently accurate, they do not provide the detailed solutions encountered in the analysis of tapered guiding structures. For this purpose, we introduce and utilize a newly developed modal transmission-line theory to analyze rigorously power transfer of the directional coupler. The numerical result reveals that the propagation constants of even and odd modes converge to a single value as increasing the spacer thickness between two symmetric tapered guides. Furthermore, 97% of the power incident into a guiding channel is transmitted to the other channel at the tapered angle ${\theta}=0.1^{\circ}$, and the efficiency of power transfer decreases dramatically as increasing the angle.

유기성 폐수처리 공정에서 발생되는 악취저감에 관한 연구

송재준 ( Jee-june Song ),김영권 ( Yong-kwon Kim ),임동혁 ( Dong-hyuk Lim ),여영기 ( Young-gi Yu ) 한국환경기술학회 2015 한국환경기술학회지 Vol.16 No.6

현재 우리나라는 산업화·공업화의 발달에 따른 하수도 보급증대로 생활폐수와 하수슬러지의 발생량이 증가하고 이에 따라 악취의 문제도 가속화 되고 있다. 하수슬러지의 발생량이 증가함에 따라 악취관련 민원도 해마다 급증하는 추세로 2010년 기준으로 7,247건에 이른다. 하수 및 유기성 폐수(가축분뇨·분뇨 등) 처리 시 발생되는 슬러지(생슬러지, 잉여슬러지)의 성상은 수분 외에 자연석에 근접한 무기물과 비료성분이 있는 유기물로 구성되어 있으며, 수처리 과정에서 뿐만 아니라 슬러지 처리 과정에서도 많은 악취가 발생하고 있다. 이 악취를 해결하기 위하여 수처리 과정의 구조물 상부를 복개하거나 커버를 씌워 발생된 악취를 강제로 흡입하여 탈취기에서 탈취한 후 대기중으로 방출하고 있는 실정이나, 100% 포집이 어렵고 악취가 새어나가고 시설비 및 유지관리비가 높아 운영에 많은 어려움을 겪고 있는 실정이다. 또한 상기한 처리 과정에서 발생되는 상징수 및 탈리 여액은 오염도가 매우 높아 이를 재처리하기 위하여 하수 유입부분 혹은 포기조 유입 부분으로 이송하는데 심한 악취가 발산되고 탈수된 케익 또한 안정화가 이루어지지 않아 파리, 모기 등 유해 곤충의 서식지가 되고 있어 처리장 근무자는 물론 주민의 보건 위생에 많은 피해를 주고 있는 실정이다. 본 연구에서 분뇨, 축산분뇨 및 생슬러지를 처리하는 과정에서 발생하는 근본적인 악취를 저감시키기 위하여 악취발생 억제 및 제거능력을 가진 슬러지를 배양 시킬 수 있는 배양조를 설치하였다. 배양 된 슬러지는 처리과정을 통해 각 공정도의 유입됨으로써 악취저감효율을 알아보고자 한다. 또한 배양된 슬러지의 미생물들의 군집종과 군집구조를 알아봄으로써 처리능력에 대해서 연구하였다. With the development of industrialization and manufacturization in Korea, the penetration rate of sewerage has increased, and thereby living wastewater and sewage sludge have more occurred. As a result, the problem of odors has become more severe. With the rising sewage sludge, the number of civil complaints about odors has been on the rise every year, reaching 7,247 cases as of 2010. In terms of shape, sludge (raw sludge and excess sludge) that occurs in the process of treating sewage and organic wastewater (e.g., livestock excrements, feces and urine) is comprised of moisture, inorganic matter close to a natural stone, and organic matter. A lot of offensive odors occur not only in the water treatment process, but in the sludge treatment process. As a solution to the problem of offensive odors, the upper part of a structure has been opened or covered in the water treatment process in order to absorb the offensive odors by force and then emit them in the air. However, in such a method, it is hard to collect offensive odors 100% and thus the odors leak, and facility and maintenance costs are so high that it is difficult to operate relevant systems. In addition, upper cleaned water and decanted water that occur in the above treatment process have a high pollution level. Therefore, severe offensive odors can occur in the process of transferring them to sewage inflow part or aeration tank which is required to retreat them. Dehydrated cake also fails to be stabilized. Harmful insects, such as flies and mosquitos, are able to inhabit. As a result, it greatly damages not only workers in treatment plants, but health and hygiene of residents. Accordingly, it has been required to develop the technology to remove high-concentration matters that make offensive odors fundamentally. In order to reduce offensive odors emissions from the process of treating feces, urine, livestock excrements, and raw sludge, to stabilize sludge, to corrode sludge to use the final sludge dehydrated cake as a soil conditioner, this researcher installed a culture tank that has the ability to control and remove offensive odors and can culture sewage treatment excess sludge and studied offensive odor emission reduction efficiency rate and the treatment abilities of microorganisms.

초저온·고진공 환경에서의 Micro Alignment Telescope(MAT)를 이용한 초전도 가속관의 정밀정렬측정에 관한 연구

이민기(Min Ki Lee),김영권(Young Kwon Kim),조용우(Yong Woo Jo),최종완(Jong Wan Choi),김우강(Woo Kang Kim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11

RAON is a heavy ion accelerator for the Rare Isotope Science Project (RISP) at the Institute for Basic Science (IBS) in Korea. The accelerator complex consists of three superconducting linear accelerators, called SCL1, SCL2, SCL3. A linear accelerator, SCL1, utilizes superconducting Quarter Wave Resonators (QWRs) and Half Wave Resonators (HWRs). A QWR cavity was installed in a cryostat. After cooling down to a cryogenic temperature in a ultra high vacuum, we measured position misalignments of the QWR cavity due to cooling down. In this paper, a precise position measurement and misalignment compensation method are presented for the QWR cavities.

페놀의 초임계수 산화에 관한 연구

김성수(Sung Soo Kim),조순행(Soon Haing Cho),김철(Chul Kim),이용훈(Yong Hun Rhee),김영권(Young Kwon Kim) 大韓環境工學會 1991 대한환경공학회지 Vol.13 No.4