SPIM 벡터제어를 위한 태양광 발전 시스템

고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),정병진(Byung-Jin Jung),김도연(Do-Yeon Kim),박기태(Ki-Tae Park),최정훈(Jung-Hoon Choi),정동화(Dong-Hwa Chung) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.11월

This paper presents the photovoltaic(PV) water pumping system with a maximum power point tracking(MPPT). The water pumping system uses a variable speed single phase induction motor(SPIM) driven a centrifugal pump by field oriented control(FOC) inverter. The MPPT using a DC-DC converter controlled the duty cycle to track maximum power from PV under different insolation conditions. The duty cycle directly relate with a flux producing current control(i<SUB>ds</SUB>). The FOC inverter uses a current control voltage source inverter(CC-VSI). The simulation results are shown that the characteristics and performance of drive system, which varies as each conditions of light by expresses in voltage(V<SUB>dq</SUB>), current(I<SUB>dq</SUB>), speed of motor and torque.

Selection of Superior Trees for Larger Fruit and High Productivity in Sorbus commixta Hedl.

Kim,Sea-Hyun,Jang,Yong-Seok,Chung,Hun-Gwan,Choi,Myoung-Sub,Kim,Sun-Chang 한국자원식물학회 2003 Plant Resources Vol.6 No.2

The objectives of this study, an analysis of the variation for leaf and fruit characteristics among the selected ten populations of Sorbus commixta Hedl. could be used for the conservation of gene resources and could provide information to superior trees selection. The results obtained from this study can be summarized as follows; Approximately, the Mt. Sungin population at Ulleung island showed larger values in overall characteristics and populations. On the other hand, Mt. Halla population at Jeju island showed the smaller values of the overall characteristics and populations. ANOV A tests showed that there were statistically significant differences in all leaf characteristics among the populations as well as individual trees within populations. But, for fruit characteristics, differences were statistically significant only among the populations. Cluster analysis using single linkage method based on leaf and fruit characteristics showed that ten selected populations of S. commixta in Korea could be clustered into three groups. Group I is Mt. Sungin at Ulleung island, Group II is Mt. Halla at Jeju island, and Group III comprises Osan, Mt. Kaji, Mt. Duckyoo, Mt. Balwang, Mt. Sobaek, Mt. O-dae, Mt. Jiri, and Mt. Taebaek. The selection level based on major agronomic traits, which are the Number of Fruit per Fruiting Lateral(NFL) over 50, and Fruit Length(FL) and Width(FW) over 10 mm, and Weight of 100 Fruit(WFI00) over 66 g, was applied on 100 sample trees, and five trees were selected. The selection effects from selected trees in NFL, FL, FW, and WF100 were evaluated as 132%, 151 %, 142%, and 264% compared to the mean of those 100 sample trees, respectively. Especially, Ulleung 2 showed excellent values that NFL and WFI00 were 95, and 69 g, respectively, suggesting a promising new cultivar for larger fruit and high productivity.

IPMSM 드라이브의 최대토크를 위한 적응 FNN 제어기

김도연(Do-Yeon Kim),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),정병진(Byung-Jin Jung),박기태(Ki-Tae Park),최정훈(Jung-Hoon Choi),정동화(Dong-Hwa Chung) 한국조명·전기설비학회 2007 한국조명·전기설비학회 학술대회논문집 Vol.2007 No.11월

Interior permanent magnet synchronous motor(IPMSM) has become a popular choice in electric vehicle applications, due to their excellent power to weight ratio. This paper proposes maximum torque control of IPMSM drive using adaptive fuzzy neural network controller and artificial neural network(ANN). This control method is applicable over the entire speed range which considered the limits of the inverter's current and voltage rated value. For each control mode, a condition that determines the optimal d-axis current i<SUB>d</SUB> for maximum torque operation is derived. This paper considers the design and implementation of novel technique of high performance speed control for IPMSM using Adaptive-FNN controller and ANN controller. The hybrid combination of neural network and fuzzy control will produce a powerful representation flexibility and numerical processing capability. Also, this paper proposes speed control of IPMSM using Adaptive-FNN and estimation of speed using ANN controller. The back propagation neural network technique is used to provide a real time adaptive estimation of the motor speed. The proposed control algorithm is applied to IPMSM drive system controlled Adaptive-FNN and ANN controller, the operating characteristics controlled by maximum torque control are examined in detail. Also, this paper proposes the analysis results to verify the effectiveness of the Adaptive-FNN and ANN controller.

국내 바이오에탄올 혼합연료유 도입을 위한 실증평가연구

임의순(Yim, Eui-Soon),민경일(Min, Kyung-Il),전철환(Jeon, Cheol-Hwan),이돈민(Lee, Don-Min),김종렬(Kim, Jong-Ryeol),김승수(Kim, Seung-Soo),장은정(Jang, Eun-Jung),박천규(Park, Cheon-Kyu),정충섭(Jung, Chung-Sub),김재곤(Kim, Jae-Kon),임 한국신재생에너지학회 2007 한국신재생에너지학회 학술대회논문집 Vol.2007 No.11

국제 원유가의 지속적인 상승에 따라 화석연료 고갈을 대비한 대체에너지 빛 온실가스배출감소를 위하여 바이오연료의 사용 및 상용보급은 전세계적인 추세이다. 우리나라의 경우 바이오디젤은 2002년부터 시범보급사업(Demonstration & dissemination)을 거쳐 2006년 7월부터 전국주유소를 통하여 경유 중에 바이오디젤 0.5%를 혼합한 BDO.5를 수송용 연료로 도입하여 아시아 최초로 상용보급화를 시행하고 있다. 또한 휘발유 중 바이오에탄올 혼합 연료유 도입을 위한 실증평가연구를 2006년 8월부터 2008년 7월까지 수행중이다. 자동차용 휘발유의 옥탄가 향상을 위해 함산소 기재로 사용되는 MTBE(Methyl Tertiary Butyl Ether)를 바이오에탄올로 대체한 바이오에탄올 혼합연료유는 수분 혼입에 의한 상 분리(Phase separation)와 금속에 대한 부식성 문제를 야기 시킬 수 있다. 바이오에탄올을 서브옥탄가솔린(Sub-octane gasoline)에 혼합하여 상 분리 모사실험, 금속류 부식시험, 고무류 침지실험 등 다양한 품질특성평가를 수행하였으며, 이런 결과들을 바탕으로 국내실정에 알맞은 최적의 혼합량(E3, E5)을 도출하였다. 또한 전국에 4개 시범주유소를 운영하여 바이오에탄올 혼합 연료유의 유통 및 보급을 통해 최적의 유통인프라(Distribution infrastructure) 보완 및 구축 방안을 도출 하고자 한다.

국내 바이오에탄올 혼합연료유 도입을 위한 실증평가연구

임의순(Yim, Eui-Soon),민경일(Min, Kyung-Il),전철환(Jeon, Cheol-Hwan),이돈민(Lee, Don-Min),김종렬(Kim, Jong-Ryeol),김승수(Kim, Seung-Soo),장은정(Jang, Eun-Jung),박찬규(Park, Cheon-Kyu),정충섭(Jung, Chung-Sub),김재곤(Kim, Jae-Kon),임 한국신재생에너지학회 2007 신재생에너지 Vol.3 No.4

국제 원유가의 지속적인 상승에 따라 화석연료 고갈을 대비한 대체에너지 및 온실가스배출 감소를 위하여 바이오연료의 시용 및 상용보급은 전세계적인 추세이다. 우리나라의 경우 바이오디젤은 2002년부터 시범보급사업(Demonstration & disseminatio을 거쳐 2000년 7월부터 전국주유소를 통하여 경유 중에 바이오디젤 0.5%를 혼합한 BD0.5를 수송용 연료로 도입하여 아시아 최초로 상용보급화를 시행하고 있다. 또한 휘발유 중 바이오에탄올 혼합 연료유 도입을 위한 실증평가연구를 2006년 8월부터 2008년 7월까지 수행중이다. 자동차용 휘발유의 옥탄가 향상을 위해 함산소 기재로 사용되는 MTBE(Methyl Tertiary Butyl Ether)를 바이오에탄올로 대체한 바이오에탄올 혼합연료유는 수분 혼입에 의한 상 분리(Phase separation)와 금속에 대한 부식성 문제를 야기 시킬 수 있다. 바이오에탄올을 서브옥란가솔린(Sub-octane gasoline)에 혼합하여 상 분리 모사실험, 금속류 부식시험, 고무류 침지실험 등 다양한 품질특성평가를 수행하였으며, 이런 결과들을 바탕으로 국내실정에 알맞은 최적의 혼합량(E3, E5)을 도출하였다. 또한 전국에 4개 시범주유소를 운영하여 바이오에탄올 혼합 연료유의 유통 및 보급을 통해 최적의 유통인프라(Distribution infrastructure) 보완 및 구축 방안을 도출 하고자 한다.

大學 男女 球技選手들의 最大無機的 Power

김태운,유재충,안덕균,선우섭,이한,손두욱,박충서 慶熙大學校 社會體育硏究所 1994 體育科學論叢 Vol.- No.7

The purpose of the present research is to compare characteristics of maximal anaerobic power observed in different types of sports and player's sex differences. We have reached the following conclusions from the results we obtained by measuring maximal anaerobic power and blood lactate concentration of 60 elite university male and female players during the exercise of bicycle ergometer: 1. As to absolute and relative values of maximal anaerobic power, male players are higher in the order of rugby and handball, whereas female players are higher in the order of hockey and soccer, but no significant differences are observed between types of sports. 2. Male players are noticably higher in absolute values of maximal anaerobic power(p<0.001), but relative value is very simi1ar to that of female players. 3. It is estimated that the fact, that female players show obvious higher mean anaerobic power(p<0.001) during the 3,4KP excercise is due to sex differences in ocdurrence work load of maximal anaerobic power. 4. Comparison of blood lactate concentration at each work load in different types of sports and player's sex differences show an increase in proportion to mean anaerobic power. The results given above clearly show the differences between the type of sports such as rugby and hockey requiring power and speed, and the type of sports such as handball and soccer requiring edurance.

스포츠에 의한 성장기 요추추체종판 장해 분석

김민섭,이종영,이충영,이승훈,임완기,강은균,이종호 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.2

Apophyseopathy in human growing-up period is divided in three parts, early stage, advancing stage, and ending stage which are analyzed by X-ray test. The tuber of kantenabtrennung, schmorl and rear oxhorn dissociation are one of the these barrier process. We assume that the fracture of apophysis by overusing is the main cause of these barriers.

Quick BASIC을 이용한 탄산염 시스템 모델(CSM)개발

김경섭,제충환 안성산업대학교 1998 論文集 Vol.30 No.-

Carbonate system in water is very important to calculate solution composition during water treatment operations where strong acids or bases are added to carbonate-bearing waters, to assess p and solution composition when acidic wastes are discharged to receiving waters, and to calculate the pH and solution composition at various stages of the alkalinity and acidity titrations. To understand this system more easily and to help water quality management and control, Carbonate System Model(CSM) using Quick BASIC is developed. CSM is mainly composed of three main parts, MAIN MENU, PROCESSOR MENU and POST-PROCESSOR MENU. in MAIN Menu, open and closed systems can be selected and in PROCESSOR MENU, equilibrium pH and solution composition are calculated with the input values of MAIN MENU. In POST-PROCESSOR MENU, the results are produced in three different ways, i.e, screen, printer and graphical display Running this model demonstrates that CSM becomes a very useful tool to understand carbonate system in water body and it can be also used to educational purpose for under-graduate and graduate students.

스포츠 영상의 이미지 형성과 강화장치로서의 기능분석

김민섭,육조영,이충영 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.20 No.1

The purpose of this study was to clarify the function of sport films in relation to the enlightenment and changeability of sport images cultivated by sport film, in the case of "Chariots of Fire." Before and after the screening of the film, the university students completed questionnaires, which consisted of sixteen questions; for example "what is sport?" "what is the purpose of sport?" T-score analysis and Hayashi's quantification method type II were applied in order to identify the elements which distinguished between the group which changed the sport images and the group which did not change. Comparing the sport images of pre-screening with the post-screening, the self-disciplined sport images increased, whereas the playful images decreased. With the multi-variated analysis, it was clarified that the entertainment items contributed to the discrimination between the sport images changed group and the non-changed group respectively.

초등학생용 진로성숙도 검사 개발 및 타당화

송인섭 ( In Sub Song ),정미경 ( Mi Kyung Chung ),김효원 ( Hyo Won Kim ),최영미 ( Young Mi Choi ) 한국아동교육학회 2011 아동교육 Vol.20 No.3

본 연구는 초등학교 고학년을 대상으로 발달계에서 주어지는 진로문제들에 대해 대처할 수 있는 준비도인 진로성숙도를 측정할 수 있는 검사를 개발하고 타당화하는 데 그 목적이 있다. 이를 위해 먼저, 국내·와 진로성숙도에 대한 각종 논문과 이론을 참고하여 진로성숙도를 개념화하고 관련 검사 문항들을 검토하여 문항을 개발하였다. 예비검사와 타당화 과정을 거쳐 총 78문항을 선정하고 요인분석과 문항난이도, 문항변별도 등을 구하여 검사를 타당화하였다. 그 결과 태도검사의 문항들이 .30 이상의 단일요인 부하량을 나타내어 각 척도가 단일성 요인임을 설명해주고 있으며 능력검사의 신뢰도는 Cronbach α계수 .52~.86으로 나타났다. 계획성 요인의 경우 .52로 일반적인 신뢰도 기준에는 낮은 신뢰도로 판단되나 진위형 척도의 특성상 신뢰도가 낮게 추정된 것으로 보인다. 그 이외의 하위용인에서는 적절한 신뢰도를 나타내었다. 그리고 진로성숙도의 내적 구조를 분석한 결과 진로성숙도의 구조는 진로에 대한 능력과 태도로 구성되며, 태도는 결정성, 독립성, 계획성으로, 능력은 직업이해. 직업선택, 그리고 직업성으로 구성된 모형이 적합함을 알 수 있었다. 본 연구는 지로성숙도를 측정하기 위해 Crites의 CMI모형을 근간으로 측정요인을 선정하고 초등학생에 맞는 연구모형을 재정립하였다는 점에서 이론적 의의가 있으며, 연구의 특성에 적합한 접근 방법으로 도구를 타당화하였다는 점에서 방법론적 의의가 있다. 그리고 아동이 진로를 선택하는 데 있어서 어떠한 정의적 태도와 지적 사고를 가지고 있는가에 대한 정보를 제공함으로써 자신에 대한 이해와 직업에 대한 이해를 바탕으로 올바른 진로선택을 할 수 있도록 도울 수 있으며 진로교육과 관련된 프로그램을 개발하는 데 기초자료로 활용될 수 있다는 점에서 실제적인 의의가 있다. The purpose of this study is 1) to define the concept of the career maturity: 2) to develop and validate the scale of career maturity for elementary school students. In order to answer these purposes, we first reviewed related documents and inventories, as to research the constructed factors which to develop an career maturity scale, then defined the concept of career maturity and the theological constructive model. The were included in 2 components of attitude and cognitive abilities for career maturity accordingly in 6 sub-components 195 elementary school students were analysed at pilot test and 1010 students were conducted final test. Based on factor analysis and item analysis, 77 items were selected to final test items. And this scale was validated through the evidence based on internal structure. Significance, limitations, and future research directions were discussed.