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이은영,김용,김필수,권순도,Lee, Eun-Young,Kim, Yong,Kim, Pill-Soo,Kwon, Soon-Do 한국조명전기설비학회 1998 조명·전기설비학회논문지 Vol.12 No.4
본 연구에서는 3상 유도전동기의 2단 제동기법올 제안하였다. 2단 제동기법이란 1단계로 제동용 커패시터에 의 한 자여자 제동법을 이용하며, 2단계로 3상 磁氣제동법을 이용하는 것으로 이는 장치의 구성이 비교적 간단하며, 저가의 비용을 필요로 하는 장점올 지니게 된다. 또한 제동특성올 시율레이션과 실험으로 확인한 결과 비교적 우수한 특성이 얻어짐올 알 수 있었다. In this paper, two-stage braking method of 3-phase induction motrois proposed. This brake involves tow stages. The first stage is capacitor self-excitation braking, and the second stage is three-phase magnetic braking. In several applicatons, a low cost and effective brake is required for three-phase induction motor. A mechanical friction brake, typical braking method for induction motor requires external energy sources which is not safe, expensive and requires maintenance. Static and dynamic analyses of the proposed brake scheme are along with analytical result, simulated waveforms and experimental waveforms are compared. The experimental results shows good agreement with the simulated results.
실시간 및 비실시간 패킷서비스를 위한 통합 패킷 스케줄링
이은영,박형근,Lee, Eun-Yong,Park, Hyung-Kun 한국정보통신학회 2009 한국정보통신학회논문지 Vol.13 No.5
최근 고속데이터통신방법을 사용하는 3세대 이동통신 서비스가 널리 보급됨에 따라 VoIP와 같은 다양한 실시간 데이터 서비스에 대한 요구 또한 증대되고 있다. VoIP 패킷은 일반적인 데이터패킷과 달리 한계지연시간이 있으며 낮은 손실율을 필요로 한다. 우리는 이러한 VoIP 패킷의 특징을 고려함과 동시에 데이터 패킷과 통합적으로 스케줄링이 가능한 스케줄링 알고리즘을 제안하고자 한다. 본 알고리즘은 기본적으로 지연시간 및 채널상태를 함께 고려하여 스케줄링 하되 VoIP 패킷이 큐에 머물러 있는 시간이 증가함에 따라 채널상태에 대한 가중치를 줄이고 지연시간에 대한 가중치를 높임으로서 스케줄링 우선권을 할당한다. 실험을 통해 우리는 이 알고리즘이 기존의 방법에 비해 높은 성능을 가지고 있음을 입증할 수 있었다. Recently, as 3rd-generation mobile communication services using high-speed data rate system are widely employed, the demand for a variety of real-time data services such as VoIP service are also increased. Unlike typical data packets, VoIP packets have delay bound and low loss rate requirement. In this paper we propose a new scheduling algorithm that schedule two deferent kinds of packets efficiently, considering the characteristics of VoIP. Basically this algorithm considers both time delay and channel condition and gives priority depending on the time delay. Simulation results show that the proposed algorithm works more efficiently than conventional algorithms.
이은영 ( Eun Yong Lee ),최혜은 ( Hye Eun Choi ),최진화 ( Jin Wha Choi ),이신은 ( Sin Eun Lee ),선인오 ( In Ho Sun ),이용웅 ( Young Woong Lee ),황민호 ( Min Ho Hwang ) 전북대학교 의과학연구소 2005 全北醫大論文集 Vol.29 No.2
Sarcoidosis is chronic multisystem disease of unknown etiology characterized by noncaseating granulomatous lesions affecting multiple organs. Any organs or tissues can be affected but sarcoidosis more frequently involves the lungs, lymph nodes, spleen, liver, skin, eyes, muscles, bones, central nervous system, and salivary glands (in descending order of frequency). It is very rare for sarcoidosis to involve the breast parenchyma but it may be confused with benign or malignant tumors. We report a case of breast sarcoidosis in a young woman who presented with breast mass.
이은영 ( Eun Young Lee ),박선희 ( Sun Hee Park ),최지영 ( Ji Young Choi ),조지형 ( Ji Hyung Cho ),김찬덕 ( Chan Duck Kim ),김용림 ( Yong Lim Kim ),김용진 ( Yong Jin Kim ) 대한신장학회 2010 Kidney Research and Clinical Practice Vol.29 No.2
C4d deposition in peritubular capillaries in renal allograft biopsies is a significant marker for diagnosis of antibody-mediated rejection. However, it is unclear whether C4d deposition could be derived from BK virus infection. We present a case of BK virus nephropathy with strong C4d deposition 10 months after kidney transplantation. The diagnosis of BK virus nephropathy was missed out, whereas strong C4d deposition was noted in the first biopsy and therefore anti-rejection therapy was started. The deterioration of renal function led to a evaluate the possibility of BK virus nephropathy with second graft biopsy and further studies of BK virus replication status. Second graft biopsy revealed BK virus nephropathy without rejection. Finally, discontinuation of immunosuppressants and addition of anti-viral therapy for BK virus resulted in recovery of renal function, despite development of pancytopenia and subsequent fungal infection after leflunomide therapy. As in this case, initial focal pathologic changes from BK virus nephropathy could be overlooked by light microscopy. In addition, even though C4d positivity in peritubular capillaries is a good marker for diagnosis of antibody-mediated rejection, the meticulous examinations of the localization of C4d is needed, considering BK virus activates complement pathways and therefore leads to deposition of C4d mainly in tubular basement membrane. Based on our case of BK virus nephropathy with strong C4d deposition, we suggest that C4d deposition could be derived from BK virus nephropathy and therefore, it should be differentiated from acute antibodymediated rejection in a renal allograft recipient.
이은영(Eun Young Lee),노현호(Hyun Ho Noh),박영순(Young Soon Park),강경원(Kyung Won Kang),조성용(Seong Yong Jo),이승열(Seung Reul Lee),박인영(In Young Park),김태화(Tae Hwa Kim),진용덕(Yong Duk Jin),경기성(Kee Sung Kyung) 한국농약과학회 2008 농약과학회지 Vol.12 No.4
In order to survey the residual characteristics of pesticides and assess their safeties in the agricultural products from markets, the agricultural products were purchased from the wholesale and traditional markets in Cheongju and Jeonju and analyzed the pesticide residues in them. No pesticide residues were found in samples from Cheongju, whereas, in case of samples collected from Jeonju, 3 pesticides including chlorothalonil were detected from 5 samples such as eggplant from wholesale market and 3 pesticides including azoxystrobin were found in tomato and grape from traditional market. Pesticide residues were detected from 10.9% of the total samples and detection levels were less than their maximum residue levels. Their estimated daily intakes ranged from 0.00102 to 0.03616% of their acceptable daily intakes, representing residue levels of the pesticides detected were evaluated to be safe.
막결합형 2상 혐기성 소화 공정을 이용한 음식물 탈리액 처리
이은영(Eun Young Lee),김형국(Hyung Kuk Kim),티투이장(Luu Thi Thuy Giang),배재호(Jae Ho Bae),배영신(Young Shin Bae),원종철(Jong Choul Won),이재훈(Jae Hoon Lee),박성균(Seung Kyun Park),조용완(Yong Wan Cho) 大韓環境工學會 2009 대한환경공학회지 Vol.31 No.11
본 연구에서는 음폐수를 대상으로 5 톤/일 처리규모의 막결합형 2상 혐기성 소화(TPADUF) 플랜트를 운영하며 유기물 제거효율 및 메탄 발생량을 파악하고, 소화가스를 이용한 발전 가능성 및 분리막 적정 운영방안을 검토하였다. 고온 산발효조, 중온 메탄조 및 UF 막으로 구성된 처리 시스템에서 평균 TCOD가 150 g/L인 음폐수를 유기물 부하 11.1 g COD/L/d까지 증가시키며 처리한 결과 최종 유출수의 TCOD는 6 g/L 이하이었으며, TCOD 및 SCOD 제거효율은 모두 95% 이상이었다. 소화 가스의 메탄 구성비는 65%이었으며, 회수된 메탄량은 시스템에서 일부 가스가 누출되었음에도 39 m3/m3 음폐수주입량, 260 m3/톤 COD유입량, 또는 270 m3/톤 COD제거량이었다. 소모된 가스량 당 발전량은 0.96 kWh/m3 가스, 또는 1.49 kWh/m3 메탄으로 다소 낮았으나 이는 소용량 발전기(15 kW급)의 저효율에 기인한 것이다. 분리막은 평균 flux 10 L/m2/hr에서 운전하였으며, 운전 중 flux가 감소하였을 때는 물 또는 화학적(NaOCl)세정을 실시하여 회복시킬 수 있었다. TPADUF 플랜트에서는 메탄조 내액 또는 분리막 농축액을 산발효조로 반송함으로써 산발효조의 pH를 별도의 약품 주입 없이 적정 수준을 유지할 수 있었으며, 산발효조에서 부분적인 메탄생성을 통해 메탄조의 유기물 부하를 낮추는 효과도 있었다. Organic removal efficiency and methane production rate, a feasibility of power generation from biogas, and the optimum conditions for membrane operation were evaluated for the pilot scale (5 tons/day) two-phase anaerobic digestion coupled with ultra filtration (TPADUF) system fed with garbage leachate. The TPADUF system is consisted of a thermophilic acidogenic reactor, a mesophilic methanogenic reactor, and an UF membrane. When garbage leachate with 150 g/L of TCOD was fed to the TPADUF up to organic loading rate (OLR) of 11.1 g COD/L/d, the effluent TCOD was lower than 6 g/L and the average removal efficiencies of TCOD and SCOD were higher than 95%. The methane composition of the gas was 65%, and the methane yield was 39 m3/m3 garbage leachate(fed), 260 m3/tons CODadded, or 270 m3/tons CODremoved, even there was some gas leak. The power production per consumed gas was 0.96 kWh/m3 gas or 1.49 kWh/m3 methane. This lower power production efficiency mainly due to the small capacity of gas engine (15 kW class). The membrane was operated at the average flux of 10 L/m2/hr. When the flux decreased, washing with water and chemical (NaOCl) was conducted to restore the flux. In the TPADUF system, optimum pH could be maintained without alkali addition by recycling the membrane concentrate or mixed liquor of the methanogenic digester to the acidogenic reactor. Also, partial production of methane in the acidogenic reactor had a positive effect on lowering the OLR of the methanogenic reactor.
한국인 류마티스관절염과 골관절염 환자의 위장관 위험인자와 비스테로이드항염제 사용 비교
이은영 ( Eun Young Lee ),홍승재 ( Seung Jae Hong ),박용범 ( Yong Beom Park ),박경수 ( Kyung Su Park ),최찬범 ( Chan Bum Choi ),이창근 ( Chang Keun Lee ),송란 ( Ran Song ),이윤종 ( Yun Jong Lee ),서창희 ( Chang Hee Suh ),김현아 ( 대한류마티스학회 2016 대한류마티스학회지 Vol.23 No.1
Objective. The aim of this study was to examine and compare the gastrointestinal (GI) risk factors and treatment patterns of rheumatoid arthritis (RA) and osteoarthritis (OA) patients in Korea. Methods. This was a cross-sectional, observational study on RA and OA patients taking non-steroidal anti-inflammatory drugs (NSAIDs) for at least 1 month. A total of 1,896 patients (981 RA patients, 915 OA patients) were recruited from 20 university hospitals. Data were collected through medical records and patient surveys. GI risk factors included age, prolonged (over 3 months) or high-dose use of NSAIDs, alcohol drinking, smoking, use of aspirin, anticoagulants or glucocorticoids, comorbidities, and history of Helicobacter pylori infection or other GI complications. Treatment patterns were classified according to groups using, selective cyclooxygenase (COX)-2 inhibitors± gastro-protective agents, non-selective COX-2 inhibitors+proton pump inhibitor, or non-selective COX-2 inhibitors±other gastro-protective agents. Results. GI risk factors were highly present in both RA and OA patients. The proportion of prolonged use of NSAIDs, smoking, and glucocorticoid use were higher in RA patients (p<0.001). The proportion of comorbidities and use of aspirin were higher in OA patients (p<0.001). The remaining GI risk factors were present in similar proportions in both groups. Use of selective COX-2 inhibitors or gastro-protective agents was higher in RA patients. Conclusion. Prolonged use of NSAIDs and concomitant glucocorticoid use were higher in RA patients, while comorbidities and concomitant aspirin use were predominant in OA patients. These results will provide insights for use in development of future guidelines for proper selection of NSAIDs and effective prevention of GI complications in arthritis patients. (J Rheum Dis 2016;23:47-54)
최병용 ( Byoung Yong Choi ),박영배 ( Young Bae Park ),이정화 ( Jung Hwa Lee ),류희정 ( Hee Jung Ryu ),이은영 ( Eun Yong Lee ),이윤종 ( Yun Jong Lee ),이은봉 ( Eun Bong Lee ),송영욱 ( Yeong Wook Song ) 대한류마티스학회 2007 대한류마티스학회지 Vol.14 No.3
Sacroiliitis is a rare manifestation in patients with sarcoidosis and there have been several case reports of ankylosing spondylitis (AS) accompanying sarcoidosis. Recently, the development of sarcoidosis has been reported in AS patients treated with tumor necrosis factor blocker. We described a 27-year-old male patient with AS and histologically proven sarcoidosis who was treated with etanercept without aggravation of sarcoidosis.