On-Line UPS 기능 내장형 ESS 설계 및 적용

권용효(Yong-Hyo Kwon),김말수(Mal-Soo Kim),오기형(Gi-Hyeong OH),장성국(Sung-Kuk Jang),최종철(Jong-Chul Choi),박기원(Ki-Won Park) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6

본 논문에서는 ESS(Energy Storage System)의 Battery측 DC 전압을 공유하여 기본적인 ESS구성에 On-Line UPS기능을 함께 가지는 Multi-Function ESS를 설계하고, 적용한 기술을 설명 한다. 용량은 PCS 250kW, Battery 190kWh, UPS 125kW용량으로 구성하였으며, UPS는 125kWh 2Set를 이중화하는 구성으로 설계 하였다. On-Line UPS 기능 내장형 ESS 전체 제어는 PMS를 통해 이루어지며, 기본적으로 계통연계(GC), 독립운전(GI), GC와 GI가 센싱을 통해 자동으로 절체되는 Auto Mode 제어 모드를 가지며, TOU Application 운영이 가능하도록 제어기를 구현하였다. 또한 PMS는 Battery SoC를 모니터링하여, 사용자가 ESS와 UPS운영을 필요에 따라 용량을 정의하고 운영할 수 있도록 하였다. 관련기술을 기본/상세 설계 후 제작하여, 기능 및 성능에 대한 시험 검증 후 실제 부하와 연계하여 실증한 사례를 기술 한다.

토지피복 변화탐지를 위한 위성영상의 적용에 관한 연구

전형섭,임승현,조기성 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-

Recently, landuse and landcover are suddenly changing by the urban development with population concentration, constrruction of the society base equipment and the reclamation project, so using this is became more densified, and the demand, which should be digitalized by society information, is increasing. Therefore, to manage efficiently the country, which is changing hourly, the method, which can detect and change wide landuse and landcover quickly and correctly, is demanding. This study quantitatively tried to detect the course of change, which used the classificated result of the detected satellite imagery with different time, and the source of the change, after the study, it could be gotten these conclusion. First, there was change about 33.19% with different time after presuming landcover change using the post-classificated change detection method, which is comparison of the classificated result of landcover, and it could be decided the change volume of each class, but it couldn't be known the change course of the landcover. Second, after detecting change of landcover, which used the mixed change detection method presented in this study, there was landcover change about 24.29% and it could indicate the change volume in addition to the change course of each landcover class, so it was made the basis, which could organically be the landcover management and environmental management. Third, while in the normal method the countered change volume of landcover presents the offset result, it could detect the offset volume in the mixed chage detection method, so it could indicate that the actual landcover change rate is about 19.82%

GMS영상의 일반적 활용을 위한 기하보정에 관한 연구

전형섭,최연웅,조기성 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-

On this study, to deal with meteorological satellite data in general data processing system without high cost of meteorological satellite data processing equipment, it studied the geometric correction method which could be coincided with real world coordinate and adjusted the spatial resolution of meteorological satellite data to observe the change of local meteorological environment. As the result of geometric correction, the Root Mean Squared Error(RMSE) generally decreased as the number of control points increased, but the minimum of these was generated in the third and fourth degree formula using 25 control points. As a result of resampling, the RMSE had no connection with the pixel size of it. Therefore when using 25 control points as uniform distribution and the polynomial expression of fourth degree as conversion formula, we could get the most appropriate result for general utilization of GMS imagery.

전남 나주 방언의 몇 특성

최형기 한국현대언어학회 2004 언어연구 Vol.19 No.3

The city of Naju is located in the northwestern part of Jeollanamdo. Naju dialcet displays a pattern of Jeollanamdo dialect. The purpose of this paper is to describe some characteristics of Naju dialect, in particular: 1) the phonological system of Naju dialect, 2) its phonological and morphological properties, and a vocabulary list of words peculiar to Naju dialect. The study confirms that Naju dialect is a sub-dialcet of Jeollanamdo dialect.

RFM을 이용한 고해상도 위성영상의 기하보정에 관한 연구

전형섭,정용주,조기성 전북대학교 공학연구원 ( 구 전북대학교 공업기술연구소 ) 2003 工學硏究 Vol.34 No.-

Manufacturing of the large scale map using the high-resolution satellite data requires high-precision geometric correction, and for this the location ephemeris data as like the location and attitude of the satellite sensor, which is an orbit component model, is needed, but in IKONOS satillite these are not porvided because of the business technology protection. Therefore, in this study, as the basic course for obtaining the ground coordinates from the IKONOS satellite imagery, using the ground control point without the satellite aid data it derived RMF's coefficient in the geometric correction of high-resolution satellite imagery, did the geometric correction using RFM and evaluated accuracy, and then finally it could be gotten the follwing conclusion as the result of evaluating the RMF's usefulness. First, as the result of applying to the least square method, to derive the coefficient of RFM using the ground control point, in the case of using the third order expression, it could derived the exact coefficient value about 0.686 pixel(m) of the root mean square error. Second, as the result of comparing the polynominal expression model and RFM, by using RFM it could improve the root mean square error more than 1.5 pixel. Third, RFM is very sensitive to the Z value information, and it could know that using the polynominal expression is more efficient than RFM is if the Z value infromation is inaccurated.

멀티미디어 도형학습 시스템

김형,양기철 木浦大學校基礎科學硏究所 1999 基礎科學硏究誌 Vol.17 No.-

Many people agreed that multimedia system considered as the best teaching method for figure learning. An implementation of figure learning system has been explained in this paper. The utilization effect analysis for the implemented system performed on 80 students shows satisfied results.

Process 개선이 기업가치에 미치는 영향 : BSC의 적용사례를 중심으로

정미녀,권형기 관동대학교 기업경영연구소 2004 경영논집 Vol.22 No.-

본 연구는 연구대상 기업인 H기업의 현재 기업 상태를 BSC를 적용하여 진단해 보고, 변화하는 기업 환경 속에서 지속적인 성장과 발전을 위해 당기순이익 뿐만 아니라 장기적 순이익을 증가 시키려는 노력이 필요하므로 BSC의 주요 핵심인 Process 개선이 기업가치에 어떠한 영향을 미치는지를 살펴보고자 한다. H기업은 1999년 H중공업에서 분리되어 독자 경영을 이끌어 가면서 사내·외의 이해관계자들로부터 과연 부실에서 벗어나 건실 경영을 할 수 있을 거라는 의문을 야기하고 있었다. 결과적으로 당기순이익을 실현하는 것이 최대의 과제이며, 차입금이 적은 상태에서는 영업외 이익이 아닌 영업이익이 대부분 당기순이익을 반영하고 있는 상황이다. 그러므로 H기업의 process 개선이 구체적으로 어떻게 고객의 관점 그리고 더 나아가서 재무적인 관점에 공헌하는가를 살펴보았으며, 이러한 process 개선에 결정적인 제약조건을 부여하는 것이 human resource의 관점에서 야기되는 문제로 나타났다. 따라서 과연 Process. 개선이 H기업의 기업 가치를 얼마나 증진시키는가는 어떤 부분을 어떻게 개선하느냐에 따라 다른 결과를 초래하므로 BSC상에서의 Human Resource(Learning & Growth) 측면이 부각시키는 제한성을 어떻게 극복하느냐에 달린 문제라고도 볼 수 있다. 이러한 불확실성에도 불구하고 BSC를 들여다보면서 여러 가지 간접적인 효과를 가늠해 본 결과 오히려 직접적인 효과 이상으로 기업가치에 영향을 미치는 것으로 나타났다.

광센서를 위한 ZnO:Al 투명도전막의 제조 및 특성연구

박기철,이형기,심호섭 경북대학교 센서기술연구소 1995 연차보고서 Vol.1995 No.-

RF 마그네트론 스퍼터링법으로 AZO(ZnO:Al)막을 증착시켰다. 타겟내의 Al_2O_3의 첨가량, 기판온도, 분위기압, RF출력 등의 증착조건의 변화에 따라 제조된 AZO막의 조성, Al 도핑양, 구조적 특성 등을 XRD, SEM, EDS 및 RBS로 조사하였다. 이와 함께 전기적 및 광학적 특성을 Hall 효과 및 광투과도 특성을 통하여 조사하였다. 증착된 AZO막은 육방정의 wurtzite 구조였으며 모든 증착조건에서 기판에 수직으로 성장하는 (002)면 방향을 가지는 c-축배향성을 나타내었다. 증착된 AZO막내의 AB 도핑량은 타겟내의 무게비에 비례하였으며 Zn : O의 조성비토 1 : 1로 거의 일정하였다. 투명도전막으로서의 최적조건은 3wt%의 Al_2O_3이 첨가된 타겟으로 기판온도가 150℃, 분위기압이 2mTorr, RF출력이 150W로 증착한 경우였으며 이 때 비저항은 4.7×10 exp (4)Ω㎝, 캐리어 농도는 7.5×10 exp (20)㎝^-3이었다. 또 두께가 1500Å인 막의 경우 550㎚에서 광투고도가 90%이상이었으며 광학적 밴드갭은 3.53eV였다. Aluminium doped zinc oxide(AZO)films were prepared by RF magnetron sputtering method. The chemical compositions, doping concentrations, and the structural char-acteristics of the AzO films were studied in accordance with various deposition parameters, such as Al_2O_3 amount, substrate temperature and working pressure, by XRD, EDS, SEM and RBS. And The electrical and optical properties of AZO films were characterized by Hall effect and optical transmittance measurements. AZO films had were hexagonal wurtzite structure and dominent c-axis orientation. The Al doping concentration in the films were monotonically increased. The atomic ration of Zn : O were 1 : 1. The substrate, working pressure and rf power for optimum condition to fabricate the transparet conductive films using a target containing 3wt% Al_2O_3 were 150 ℃, 2mTorr and 150W, respectively. The resistivity and the carrier density of the AZO film prepared under this condition were 4.7 × 10 exp (-4) Ω㎝ and 7.5 × 10 exp (20) ㎝^-3, respectively. The optical transmittance of 1500 Å thick films at 550㎚ is ∼90% and optical energy band gap was 3.53eV.

새로운 Acetylcholinesterase inhibitors의 합성

최순규,김형민,조승환,최학기,박유미,이용균,정대일,김인식,한정태 동아대학교 부설 기초과학연구소 2004 基礎科學硏究論文集 Vol.21 No.1

노인성 치매의 일종인 alzheimer's disease의 효과적인 억제제를 합성하기 위해 우리는 분자 모델링에 의한 가장 적합한 물질인 m-[(N,N,N-trimethylammonio)phenyl]boronic acid를 합성하였다. 출발물질인 3-aminophenylboronic acid monohydrate의 경우 boronic acid의 작용기인 hydroxyl group을 protecting시킴으로써 반응의 안정성을 기하였다. Quarternary ammonium salt는 과량의 methyliodide와 염기 촉매인 potassium hydrogen carbonate를 사용하여 용매인 methanol에서 반응시켜 상당히 높은 수율을 얻을 수 있었다. 또한 과량의 methyliodide와 염기촉매인 potassium hydrogen carbonate를 사용하여 용매인 methanol에서 반응시킨 결과 boronic acid의 protection없이도 안정하게 반응이 진행되어짐을 확인할 수 있었다. In order to syntheisize a effective inhibotor for alzheimer's disease, we synthesized m-[(N,N,N-trimethylammonio)phenyl]boronic acid 4 which is designed by molecular modeling form. We protected the hydroxyl group of 3-aminophenylboronic acid monohydrate 1 with ethlyne glycol to remove the reactivity if hydroxyl group. To synthesize m-[(N,N,N-trimethylammonio)phenyl]boronic acid 4, we reacted 3-aminophenylboronic acid monohydrate 1 with ezcess methyl iodide and potassium hydrogen carbonate as a base-catalyst in methanol. but On executed reaction without protection on hydroxyl group, we found out the result that the hydroxyl group of boronic acid group at 3-aminophenylboronic acid monohydrate 1 didn't react with excess methyliodide. Synthesized m-[(N,N,N-trimethylammonio)phenyl]boronic acid 4 is in progress about biological tests as a plausible acetylcholinesterase inhibitor.

실과교육에서 환경 친화력 향상을 위한 교수 자료 개발에 관한 연구

박행모,방기혁,김용익,기용주,김재남 광주교육대학교 초등교육연구소 2000 初等敎育硏究 Vol.15 No.1

The purposes of this study were to investigate possibilities and objectives of environmental education, and to analyze the environmental content elements available in the 7th curriculum, and to suggest strategies for the development of teaching materials for the improvement of pro-environmental power in practical arts education. This study was carried out through review of literature and discussions with panels of judges composed of experts in the environment related fields. The results of this study were as follows; 1)It was identified that an environmental education through practical arts subject was very efficient because principles of environmental education coincided with characteristics of practical arts education which emphasizes on real life, direct experience, and inter-disciplinary approach. 2)It was identified that an environmental education in elementary school was reflected on different courses in a distributed way, contents related to the environmental education such as resources, environmental conservation, an environmental hygiene has been included in the practical arts subject from the 1th curriculum to the 7th curriculum of the elementary school. 3)It was identified that contents such as orientation of jobs related an environment, separate garbage collection, food hygiene, recycle of waste articles, environmental pollution, and an environmental conservation could be reflected in the 7th curriculum. 4)Proposed strategies for developing teaching materials related to the improvement of pro-environmental power in practicalarts education ware a consideration of environment education frame in entire school system, an emphasis of practical and experience, the maximum uses of concrete stimulus, the uses of various places and facilities, the active uses of web site through internet.