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.

우슈도장 수련생의 서비스공정성 지각이 고객참여행동과 고객시민행동에 미치는 영향

최형섭(Choi, Hyung-Sub),한진욱(Han, Jin-Wook),김태형(Kim, Tai-Hyung) 한국체육과학회 2014 한국체육과학회지 Vol.23 No.1

The purpose of this study was to examine the impact of service fairness on customer participation behaviors and customer citizenship behaviors in Wu-shu participants. Toward this end, a total of 270 wu-shu participants in Gyeonggi-do area was selected using a convenient sampling method. 250 usable questionnaires were returned to the researchers. Data analyses were conducted for frequency analysis, exploratory factor analysis, reliability test, correlation analysis, descriptive analysis, and multiple regression analyses with PASW 18.0. The results of this study indicated that (1) distributive and procedural fairness dimensions had significant effects on customer participant behaviors, (2) all the three sub-dimensions(distributive, procedural, and interactional) of service fairness had a significant impact on customer citizenship behavior, and (3) both communication and sympathy dimensions of customer citizenship behavior positively affected customer citizenship behavior. Additional implications and directions for future research were discussed.

태양광 발전을 이용한 유도전동기 드라이브의 벡터제어

정병진(Byung-Jin Jung),고재섭(Jae-Sub Ko),최정식(Jung-Sik Choi),김도연(Do-Yeon Kim),정동화(Dong-Hwa Jung) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월

This paper is proposed the vector control of 3-phase induction motor drive system by photovoltaic generation. For performance of vector control using a current control voltage source inverter(CC-VSI). CC-VSI is controlled by torque and flux producing component of motor current, relating with current and and voltage value of photovoltaic arrays at maximum power point that varies follow different level of insolation. The MPPT using a DC-DC converter controlled the duty cycle to track maximum power from PV under different insolation conditions. 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.

Acute and Sub-chronic Oral Toxicity Study of Ammonium Persulfate in Spraque-Dawley Rats

Kim, Yong-Soon,Baek, Min-Won,Sung, Jae-Hyuck,Ryu, Hyun-Youl,Kim, Jin-Sik,Cho, Hyun-Sun,Choi, Byung-Gil,Song, Min-Sub,Song, Moon-Yong,Baik, Eun-Ju,Choi, Young-Kuk,Kim, Jong-Kyu,Yu, Il-Je,Song, Kyung-Se Korean Society of ToxicologyKorea Environmental Mu 2009 Toxicological Research Vol.26 No.3

The toxicity test of ammonium persulfate was conducted to ensure of its potential toxic effects according to the single-dose acute oral toxicity study (OECD Guideline 423) and 90-day repeated dose sub-chronic oral toxicity study guideline (OECD Guideline 408) for establishing national chemical management system, and matching in the Globally Harmonized Classification System (GHS) category. In acute oral toxicity study, pasty stool, perineal contamination and temporary body weight decrease were observed after dosing 1st and 2nd challenge (300 mg/kg body weight). All test animals were dead within 6 hours after dosing at 3rd challenge (2000 mg/kg body weight). Therefore, the GHS class of test substance is considered class 4. In sub-chronic toxicity study, body weight changes, food consumptions, hematological, biochemical and pathological examination did not show any noticeable and significant differences between the administered (5, 20, 80 mg/kg body weight) and control (vehicle only) group animals. Based on these results, the no observed adverse effect level (NOAEL) is considered above 80 mg/kg body weight.

Acute and Sub-chronic Oral Toxicity Study of Ammonium Persulfate in Spraque-Dawley Rats

Yong Soon Kim,Min Won Baek,Jae Hyuck Sung,Hyun Youl Ryu,Jin Sik Kim,Hyun Sun Cho,Byung Gil Choi,Min Sub Song,Moon Yong Song,Eun Ju Baik,Young Kuk Choi,Jong Kyu Kim,Il Je Yu,Kyung Seuk Song 한국독성학회 2009 Toxicological Research Vol.25 No.3

The toxicity test of ammonium persulfate was conducted to ensure of its potential toxic effects according to the single-dose acute oral toxicity study (OECD Guideline 423) and 90-day repeated dose sub-chronic oral toxicity study guideline (OECD Guideline 408) for establishing national chemical management system, and matching in the Globally Harmonized Classification System (GHS) category. In acute oral toxicity study, pasty stool, perineal contamination and temporary body weight decrease were observed after dosing 1st and 2nd challenge (300 ㎎/㎏ body weight). All test animals were dead within 6 hours after dosing at 3rd challenge (2000 ㎎/㎏ body weight). Therefore, the GHS class of test substance is considered class 4. In sub-chronic toxicity study, body weight changes, food consumptions, hematological, biochemical and pathological examination did not show any noticeable and significant differences between the administered (5, 20, 80 ㎎/㎏ body weight) and control (vehicle only) group animals. Based on these results, the no observed adverse effect level (NOAEL) is considered above 80 mg/kg body weight.

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.

메세지 전송을 이용한 클럭 동기화에 관한 연구

최용락,박진섭,하수철 大田大學校 1988 論文集 Vol.7 No.1

製絲時(韓國,中國産고치)의 界面活性劑(Monopol LX, Emulon DO#113) 處理가 製絲成績에 미치는 影響

최진섭,裵啓宣,鄭元福,金東建 東亞大學校生命資源科學大學附設 農業資源硏究所 1992 農業生命資援硏究 Vol.1 No.1

본 實驗은 界面活性劑인 Monopol LX와 Emulon DO #113을 0.04%, 0.07%, 0.1%로 稀釋하여 煮菌時의 低溫渗透部 단독 處理區와 低溫渗透部 및 繰絲湯의 동시 處理區로 하여 中國産고치와 韓國産고치의 繰絲成績 및 絲質을 調査 分析한 結果는 다음과 같다. 1. 解舒率은 韓國産, 中國産 모두 無處理區에 비해 Monopol LX 와 Emulon DO #113을 處理時에 增加하였으며 0.1% 濃度에서 그 경향이 높았다. 2. 解舒絲長은 解舒率과 같은 傾向으로 無處理區보다 Monpol LX와 Emulon DO #113 處理區에서 전반적으로 길어졌는데 특히 中國産고치에서 Monopol LX 0.1% 處理時 高度의 有意差를 보였다. 3. 菌絲長은 處理別로 다소의 增感은 있었으나 無處理區와 거의 비슷한 傾向을 나타내었다. 4. 菌絲量은 Monopol LX와 Emulon DO #113약제 처리시에 감소하는 경향을 나타내었다. 5. 生絲量比率은 無處理區에 비해 減少하는 경향을 나타내었다. 6. 副蠶絲量은 界面活性劑 處理의 結果 그 양이 減少되었으며 특히 韓國産 누에고치에서 0.07%, 0.1%의 Emulon do#113 渗透部 및 繰絲湯 處理區에서 5%의 有意差를 보였다. 7. 解舒率이 높을수록 無處理區에서는 强力은 負의 相關을 解舒絲長, 繭絲長, 繭絲量, 生絲量比率, 伸度등에서는 正의 상관을 나타내었고, Monopol LX 0.1% 處理區는 副蠶絲量에서, 그리고 Emulon Do#113 0.1% 處理區에서는 副蠶絲量, 繭絲織度, 伸度 등에서 負의 相關을 나타내었다. 8. 한국산 고치에 비해 중국산 고치는 고치의 크기가 작고, 解舒率, 解舒絲長, 繭絲長, 繭絲量, 生絲量比率, 伸度등의 成績이 떨어졌으며, 副蠶絲量이 많은 편이었다. This experiment was carried out to investigate the reeling silk results and silk quality of Korean cocoon and Chinese cocoon which were experimented on the following condition that Monopol LX & Emulon DO #113(penetrating agents) were 0.04%, 0.07%, 0.1% under only low temperature osmose treatment and simultaneous treatment of low temperature osomose & reeling bath in cocoon cooking, and the results obtained were as follows; 1. The percentage of reliability increased in the treatment of Monopol LX, Emulon DO #113 as compared with control in both Korean cocoon & Chinese cocoon exhibited a high tendency in 0.1% concentration to the extent to show a significant difference. 2. The nonbreaking length of a bave was totally longer in the treatment of Monopol LX, Emulon DO #113 than control as in the percentage of rawsilk, especially, showed a highly significance in the treatment of Monopol LX 0.1% of Chinese cocoon. 3. The length of a bave showed almost similar tendency to control with more or less increase and decrease according to the treatments. 4. Decreasing tendency was revealed in treating Monopol LX and Emulon DO #113 on the terms of the bave weight. 5. On the terms of the percentage of rawsilk, decreasing tendency was appeared in treating plots as compared with control. 6. The weight of byproduct was decreased by treating the penetrating agents especially on Korean cocoon, the statistically significant differences of 5% were revealed in treating the osomose and reeling both of Emulon DO #113 concentrated with 0.07% and 0.1%. 7. Negative correlation in tenacity was appeared in control as increasing the percentage of rawsilk, and positive correlation in the nonbreaking length, length of a bave weight, percentage of reliability, and elongation was convinced and also negative correlation was revealed in weight of byproduct treated with Monopol LX(0.1%) and in weight of by product, size of bave, and elongation treated with Emulon DO #113(0.1%), 8. The percentage of rawsilk, nonbreaking length of a bave, percentage of reliability, weight of a bave, size of a bave and elongation of Chinese cocoon were all lower than those of Korean cocoon, and on the hand, the weight of byproduct was more.

고등학생 및 대학생의 AIDS에 관한 지식 및 태도 비교조사

최길명,선우섭,이혁,조진우,이한 경희대학교 사회체육연구소 1996 體育科學論叢 Vol.- No.9

The present research is to provide basic data for establishing an effective educational program for preventing AIDS. The following are the results of data collected from 2,123 high-school third grade students (1,051 male and 1,072 female) and 2,109 college freshman students (1,483 male and 626 female) and analyzed in terms of their status, sex, and region: 1. As for the corrects answers to the questions concerning knowledge of AIDS, high-school and college male students tend to show higher grades, especially in theepidemic and non-epidemic aspects of AIDS. 2. As for the correct answers to the questions concerning attitudes to AIDS, high-school female students tend to show higher grades. 3. As for the corrects answers to the questions on knowledge of AIDS, college students received higher grades (p<.001), especially in the epidemic and non-epidemic aspects (16 questions) of AIDS. 4. As for the correct answers to the questions concerning attitudes to AIDS, college students received higher points (p<.05), especially in preventive attitudes (10 questions). 5. The regional order of correct answers to the questions concerning knowledge of AIDS in high-school students is Kyungsang, Choongchung, Kangwon, Chunla, Cheju, Seoul, and Kyunggee. But, the order of correct answers in college students is Chunla, Seoul, Kyungsang, Kangwon, Choongchung, Kyunggee, and Cheju. 6. The regional order of correct answers to the questions concerning attitudes to AIDS in high-school students is Choongchung, Cheju, Kyungsang, Seoul, Kangwon, Chunla, and Kyunggee. However, the order of correct answers in college students is Kangwon, Kyungsang, Choongchung, Chunla, Seoul, Kyunggee, and Cheju. The research result shows that the educational program for preventing AIDS must take into consideration knowledge on epidemic and non-epidemic aspects of AIDs and preventive attitudes toward AIDS. And, it also proves that it is necessary to devise an AIDS educational program for high-school and college students.

도심지 터널형 방음벽의 환경적 요인 및 외관 디자인에 관한 연구

최정민,윤태호,박창섭,이경희,박진석 국립7개대학공동논문집간행위원회 2005 공업기술연구 Vol.5 No.-

This study is to obtain a basic data for a better environment and visual design improvement for the sound barrier tunnel located along the overpasses which passed through downtown areas. For this purpose, the traffic noise was measured in Daegu. In addition. using the sound analysis software, equivalent sounds were checked and analyzed. Finally, the alternatives of sound barrier tunnel were proposed.