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PSCAD/EMTDC와 FEA를 이용한 케이블 배열 방법에 따른 전류 불균형률의 비교
신호전(Ho-Jeon Shin),김지호(Ji-Ho Kim),강갑석(Gab-Suk Kang),김재철(Jae-Chul Kim),이향범(Hyang-Beom Lee) 대한전기학회 2013 전기학회논문지 P Vol.62 No.2
In this study, samples from the site where there occurred unbalanced current when cable routing were analyzed, and the simulation program for electric power system analysis, PSCAD/EMTDC, was used to calculate the current unbalance on cable routing. Based on electromagnetic finite element analysis(FEA), electromagnetic parameters enabled the interlocking with COMSOL for the calculation of allowable current ampacity and magnetic filed distribution. This then led to modeling unbalanced current between common modes using the unbalanced current analysis program, thereby comparing and discussing the results from both. The analyzed model is a common mode 2 parallel circuit, which is a basic model for cable routing, and by arranging cables in various ways, the arrangement with the least current unbalance was suggested, which would, in the future, prevent earth faults and extend life for the whole cable.
신호선(Ho-Sun Shin),추준욱(Jun-Uk Chu),이승하(Seungha Lee),이연정(Yun-Jung Lee) 한국지능시스템학회 2003 한국지능시스템학회논문지 Vol.13 No.2
새로운 3차원 도립진자 시스템의 구현 및 퍼지제어에 관하여 논한다. 기존의 1차원 또는 2차원 도립진자 시스템과 달리, 3차원 도립진자 시스템은 상하 운동을 포함하는 인간의 도립진자 제어행위를 적절히 모사할 수 있는 새로운 시스템이다. 3차원 도립진자 시스템의 특성 분석과 퍼지제어기 설계를 위하여 3축 직교로봇과 도립진자를 포함하는 기구부의 동력학식을 유도한다. 로봇의 여유자유도와 제한된 작업영역을 고려하면서 도립진자의 요오(yaw) 및 피치(pitch)각을 제어하기 위한 퍼지제어기 설계 방법을 제안한다. 개발된 PC 기반의 다축제어보드를 이용한 실험 결과를 통하여 제안된 시스템의 성능을 검증한다. The fuzzy control and implementation of a new three-dimensional(3-D) inverted pendulum system are addressed. In comparison with conventional 1-D and 2-D systems, the 3-D inverted pendulum system is a proper benchmark system to simulate human's control action which includes the up and down motion to stabilize an inverted pendulum. To investigate the characteristics of the 3-D inverted pendulum system and to design of a fuzzy controller, we derive dynamic equations of the mechanism including a 3-axis cartesian robot and an inverted pendulum. We propose a design method of a fuzzy controller of the yaw and pitch angles of an inverted pendulum. In the design, the redundant degree-of-freedom(DOF) of the robot and the constrained workspace are taken into account. The performance of the proposed system is proved by experimental results using a developed PC-based Multi-Motion Control(MMC) board.
금강 수계 주요지류인 갑천과 미호천에서 잠정유해물질 오염원 확인 연구
이준배 ( Jun Bae Lee ),이재정 ( Jay Jung Lee ),조윤해 ( Yoon Hae Cho ),윤조희 ( Jo Hee Yoon ),홍선화 ( Seoun Hwa Hong ),이대희 ( Dae Hee Lee ),이수형 ( Soo Hyung Lee ),조영환 ( Young Hwan Cho ),신호상 ( Ho Sang Shin ) 한국환경농학회 2016 한국환경농학회지 Vol.35 No.1
BACKGROUND: Water quality is of concern to water utility operators, public health officials, and populations using the water. If any contaminant is released from a point of entry, it could be spread rapidly throughout the water stream. So the identification of the location of the points of entry and its release history are critical informations to establish the management strategy. METHODS AND RESULTS: Aniline, nonylphenol, pentachlorophenol and formaldehyde in 39 surface water samples were analysed using Gas chromatography-mass spectrometry (GC-MS) methods. Formaldehyde, aniline and nonylphenol were mainly detected in the near sites where industrial waste water and domestic sewage were discharged into stream. But pentachlorophenol was detected in the downstream samples where pulp manufacturing plants were operated. CONCLUSION: Results indicate that pentachlorophenol found in main stream of Guem river was mainly introduced from pulp manufacture industries. Otherwise, formaldehyde, aniline and nonylphenol were mainly contaminated from the industrial waste water and domestic sewage.
항고혈압제 복용 유ㆍ무에 따른 12주간 유산소운동이 고혈압 중년 여성의 혈압, 혈관탄성 및 혈중지질에 미치는 영향
신호수(Shin Ho-Su),이광식(Lee Kwang-Sik) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.4
The purpose of this study was to verify the effect of 12weeks aerobic exercise on blood pressure, vascular compliance and blood lipids in hypertensive middle-aged women(age 40~60) with or without antihypertensive agents. The subjects were divided into three groups; exercise with antihypertensive agents group(EA, n=10), exercise without antihypertensive agents group(EB, n=10), and exercise control group(EC, n=11). In the all group, aerobic exercise were performed 45minutes a day at 1st week, 60minutes a day from 2nd to 12th week, 5 times a week during a 12weeks program used treadmill with 50%HRR and 60%HRR, respectively. This study were measured a change of weight, heart rate, blood pressure, vascular compliance, and blood lipids in a rest condition. The results were as follows : First, the significant decrement was founded on systolic pressure in all groups, and diastolic pressure in EA and EB group, however, no significant differences found among groups on systolic pressure and diastolic pressure after the 12weeks. Second, EA and EB group has significant improvement on vascular compliance in left, and all groups in right, but, no significant differences reveled among groups in left and right. Third, significant decrement was reveled on heart rate in EA and EC group, and weight in all groups, respectively. However, no significant differences represented among groups in heart rate and weight. Forth, only EA group has significant decreased on TC, and TG, and EA and EB group on glucose, but, no significant differences reveled among groups, respectively. Consequently, results suggested that aerobic exercise is required a both hypertensive middle-aged women with or without antihypertensive agents for improvements of a blood pressure and vascular compliance.
패혈증에 의한 급성 신부전의 예견인자로서의 APACHE III prognostic system과 Liano system의 유용성
신호진(Ho Jin Shin),이수봉(Soo Bong Lee),곽임수(Ihm Soo Kwak),나하연(Ha Yeon Rha),송상헌(Sang Heun Song),정현철(Hyun Chul Jung),배우형(Woo Hyung Bae),안승재(Seung Jae Ahn) 대한신장학회 2000 Kidney Research and Clinical Practice Vol.19 No.2
N/A Uncontrolled infection quite often 1eads to systemic inflammatory response syndrome and multi-organ dysfunction syndrome. Despite advances in medical knowledge and technology, the mortality of patient with sepsis is still 35-60%, and even reach up to 50-90% in septic patients having acute renal failure. The purpose of this study was to examine the characteristics and predictive factors of progression to acute renal failure(ARF) in sepsis. We analyzed the bacteriologic and laboratory data of 54 admitted patients with SIRS(systemic inflam-matory response syndrome) at Pusan National University Hospital from July 1997 to July 1999(ARF 23 vs non-ARF 31). Multiple factor which may influence mortality and progression to AEK in sepsis, were evaluated and measured on admission day. The following of results, 1) Of the 54 patients, 23 were ARF group and 31 were non-ARF group. Mean age were,52 years and 51 years. The mortality of ARF group and non-ARF group were 78% and 23%, Urine output, albumin, cholesterol, mean arterial blood pressure and evidence of underlying disease were not statistically different in each group. 2) Although the sources of sepsis could not identified in 9%(ARF), 23%(non-ARF), the others had the primary site of infections ' gastrointestinal tract(35% vs 29%), lung(30% vs 19%), genitourinary tract(9% vs 13%), skin(17% vs 16%). 3) Although statistically not different, gram-posi-tive bacterial infection was more common in ARF group(mainly staphylococcus aureus). Culture negative results were 4 patients(ARF), 1 patient(non- ARF). 4) APACHE III score in ARF group was higher than non-ARF group(48.1±16.5 vs 30.2±15.6). Liafio score in ARF group was higher than non-ARF group(39.1±13.0 vs 28.9±8.3). 5) APACHE III score and Liailo score in non- survivors were higher than survivors(APACHE III score:48.6±15.3 vs 28.1±14.0, Liaho score:37.9±12.0 vs 29.4±9.2) 6) APACHE lII system was positively correlated with Liaho system(r=0.512, p=0.001). In conclusion, APACHE III system and Liaho system were significant predictors of progression to ARF and mortality in sepsis. In the future, prospec-tive and multicenter studies are required to improve the method of treatment and the prognosis in sepsis.