ZVS-LC 및 LCC형 부하병렬 공진 DC-DC 컨버터의 특성해석

오경섭,남승식,김동희,노채균 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.1

The proposed converter connected by two capacitors in parallel with switching devices. The converter reduce the switching loss and switching noise and voltage stress at switching instants. This paper describes the operating principle of the proposed LC and LCC-Type Load Parallel Resonant DC-DC Converter Using ZVS capacitors. The analysis of the proposed circuit are described of using the normalized parameters to be required in all the design steps. Also, the principle of basic operating and the characteristics of driving were estimated switching frequency and the parameter. And, the data fur designing got by the characteristic values example of the design's method was proposed. And, this paper conform a rightfulness of theoretical analysis by comparing a theoretical values obtained from simulation results and experimental values obtained from experiment using MOSFET as switching device.

A Study of the Distribution of Stress in Bellows according to Various Conditions

Kyeong-Ro Lee,Jin-Bong Kim 한국기계기술학회 2013 한국기계기술학회지 Vol.15 No.5

전원분할 커패시터 용량변화에 따른 ZVS-HB형 DC-DC 컨버터의 특성해석

오경섭(Kyeong-Seob Oh),남승식(Seung-Sik Nam),김동희(Dong-Hee Kim),노채균(Chae-Gyun Ro),배영호(Yeong-Ho Bae),노철균(Chol-Gyun Ro) 대한전기학회 2000 대한전기학회 학술대회 논문집 Vol.2000 No.7

스포츠를 활용한 CSR활동의 인식, 태도, 적합성과 기업평가요소 및 고객태도의 관계분석

장경로 ( Kyeong Ro Jang ),김민철 ( Min Cheol Kim ) 한국스포츠산업경영학회 ( 구 한국스포츠행정경영학회 ) 2012 한국스포츠산업경영학회지 Vol.17 No.6

본 연구는 스포츠를 활용한 CSR활동의 인식, 태도, 적합성이 기업신뢰, 기업이미지의 기업평가요소 및 고객만족, 고객충성도의 고객태도와 어떠한 관계를 맺고 있는지를 밝히는데 연구의 목적이 있다. 연구목적의 달성을 위해 체육학.경영학 석.박 사과정을 대상으로 사전조사를 실시하였고, 이를 통해 연구에 적합한 기업을 추출하였다. 또한 본 조사에서는 국내 Y시와 S시 에 거주하고 있는 만 20세 이상의 일반시민들을 대상으로 편의표본추출법을 통해 총 330부의 최종표본을 확보하였고, 구조방 정식 모형분석(structural equation model)을 통해 다음과 같은 결론을 얻었다. 첫째, CSR활동 태도와 적합성은 기업신뢰에 영 향을 미치는 것으로 나타났다. 둘째, 기업신뢰는 기업이미지에 영향을 미치는 것으로 나타났다. 셋째, 기업이미지는 고객만족 과 고객충성도에 영향을 미치는 것으로 나타났다. 넷째, 고객만족은 고객충성도에 영향을 미치는 것으로 나타났다. 결론적으로 스포츠를 활용한 CSR활동은 기업평가 및 고객태도에 직·간접적인 영향을 미치며, 이러한 결과는 다양한 분야로 확대되고 있 는 CSR활동 정책에 중요한 정보를 제공해 줄 수 있을 것으로 기대된다. 특히, 스포츠를 활용한 CSR활동과 기업평가 및 고객 태도의 긍정적인 효과는 CSR활동의 높은 마케팅적 효과를 입증하고 있다. This research aims at analyzing the relations among perception, attitude, fit of CSR with sports, factors of corporation evaluation that are corporation reliability, corporation image, corporation reputation and consumer behavior which are consumer satisfaction and consumer royalty. The pre-inspection was carried out to sort out proper corporation for this study targeting candidates of physical education and business administration. The subjects are citizens over age 20 who lived in Y-city of country and 330 samples are used. The results of this study are as follows. First, attitude and fit of CSR have an effect on corporation reliability. Second, corporation reliability have an effect on corporation image. Third, corporation image have an effect on consumer satisfaction and consumer royalty. Fourth, consumer satisfaction have an effect on consumer royalty. The more a group has a high interest in fit, attitude, perception of CSR, the more people of the group can easily recognize factors of corporation evaluation and consumer behavior. In conclusion, CSR with sports has direct and indirect effects on corporation evaluation and consumer behavior, so it``s expected that these conclusions will have a great effect on policy of CSR. Especially, those positive effects of CSR with sports, corporation evaluation and consumer behavior prove effective marketing strategy of CSR.

기업의 스포츠마케팅 역량, 경쟁우위, 경영성과의 관계분석 및 혁신의 조절효과

장경로 ( Kyeong Ro Jang ),김민철 ( Min Cheol Kim ) 한국스포츠정책과학원(구 한국스포츠개발원) 2013 체육과학연구 Vol.24 No.4

본 연구는 기업의 스포츠마케팅 역량과 경쟁우위, 경영성과의 관계분석 및 마케팅 역량, 경쟁우위, 경영성과의 관계에서 혁신의 조절효과를 분석하기 위해 시도되었다. 이에 국내 기업의 스포츠마케팅 전략이 조사되었고 설문조사를 통해 현대카드와 삼성전자를 연구대상 기업으로 최종 선정하였다. 이후 본 연구에서는 현대카드와 삼성전자에 종사하는 정규직 직원을 대상으로 설문조사를 실시하였고, 이를 통해 최종적으로 351부의 통계자료를 확보하였다. 이에 본 연구에서 얻어진 연구결과는 다음과 같다. 첫째, 스포츠마케팅 역량의 전문역량과 구조역량은 경쟁우위에 영향을 미치며, 스포츠마케팅 역량의 전문역량은 효율성에 그리고 구조역량은 효과성에 영향을 미치는 것으로 나타났다. 또한 기업의 경쟁우위는 경영성과에 영향을 미치는 것으로 나타났다. 둘째, 스포츠마케팅 역량, 경쟁우위, 경영성과의 관계에서 혁신의 조절효과는 활용적 혁신에서 나타났다. 특히, 활용적 혁신은 스포츠마케팅 역량(전문역량, 구조역량)과 경쟁우위, 구조역량과 경영성과(효과성, 효율성), 경쟁우위와 효율성의 관계에서 조절변수로서 역할을 하는 것으로 나타났다. 결론적으로 본 연구에서는 기업의 스포츠마케팅 전략을 통해 마케팅 역량, 경쟁우위, 경영성과를 확보할 수 있다는 이론적 근거를 제시하고 있으며, 혁신인식 수준에 따라 스포츠마케팅 전략의 효과성을 다르게 인지하고 있음도 확인할 수 있었다. This study analyzed the relationships among sports marketing capability, competitive advantages, and performance of corporations and the moderation and mediation effects of innovation in the relationships. Regarding this, corporations` sports marketing strategies were investigated and Hyundai Card Co., Ltd. and Samsung Electronics Co., Ltd. were selected as the subject corporations via the questionnaire survey. Their full-time employees participated in the questionnaire survey and 351 questionnaires were collected for statistical data. Data processing was performed by SPSS 15.0 and Amos 5.0. Study results were derived using independent t-test, structural equation model, and moderation effect analysis. Finally the following results were obtained. First, the professional capability and structural capability of sports marketing capability had an effect on competitive advantage; the professional capability of sports marketing capability had an effect on efficiency; and the structural capability of sports marketing capability had an effect on effectiveness. Also, corporations` competitive advantage had an effect on performance. Second, in the relationships among sports marketing capability, competitive advantages, and performance, the moderation effect of innovation was found in exploitative innovation. In particular, exploitative innovation played a moderating role in the relationships between sports marketing capability(professional capability and structural capability) and competitive advantage, between structural capability and performance(effectiveness and efficiency), and between competitive advantages and efficiency. As a result, corporations can secure marketing capacity, competitive advantage and performance through sports marketing strategies and the effectiveness of sports marketing strategies can differently be recognized according to the level of innovative cognition.

소프트 스위칭 기법을 이용한 ZVS-HB형 고주파 공진 DC-DC 컨버터의 설계 및 특성해석

吳慶燮(Kyeong-Seob Oh),南承植(Seung-Sik Nam),金京植(Kyeong-Sik Kim),金東熙(Dong-Hee Kim),盧采均(Chae-Gyun Ro) 대한전기학회 2001 전기학회논문지 B Vol.50 No.4

UWB 기반 Distributed MAC 시스템에서 QoS 만족을 기반의 협력 통신 프로토콜

허경(Hur Kyeong),최수환(Choi Suhwan),김경호(Kyeong Ho Kim),정민아(Min A Jeong),이연우(Yeon Woo Lee),윤석호(Seokho Yoon),배진수(Jinsoo Bae),이성로(Seong Ro Lee) 한국통신학회 2011 한국통신학회 학술대회논문집 Vol.2011 No.11

Effect of Thermal Treatment and UVB Irradiation on the Antioxidant Capacity of β-cyclodextrin and Anthocyanin Complex at Various pH Values

Kyeong-Seon Joo,Jung Sun Hong,Yong-Ro Kim 한국산업식품공학회 2016 학술대회 및 심포지엄 Vol.2016 No.10

To increase the stability of anthocyanin from black rice, β-cyclodextrin (β-CD) formed a complex with anthocyanin, and thermal and UVB stability of the complex was investigated at various pH levels. The formation of β-CD complex with anthocyanin was confirmed by the decreased UV-Vis spectrophotometer absorbance (at 511nm) with increasing the concentration of β-CD at pH 2, 2.5, 3, 4, and 5. ABTS (2, 2’-azino-bis-3-ethylbenzothiazoline-6-sulfonic acid)assay was conducted to measure radical scavenging capacity (RSC) of the complex at pH 2, 4, 6, and 8, after which the RSCs were recorded over the 24 h heating(95°C) and 24 h UVB irradiating periods. The RSC values of the complexes increased as the β-CD concentration increased (0.1-2%) at pH 6 and 8. Upon thermal treatment, the RSC readings of the complexes tended to decrease to a lesser extent compared to the anthocyanin control (without β-CD) at pH 2. This result suggests that the thermal stability of anthocyanin was more retained in the presence of β-CD at low pH (pH 2). However, in the case of UVB irradiation, the effect of β-CD complex on the anthocyanin RSC was not significant, though the RSC values for both the anthocyanin control and complexes trended downward as the UVB irradiation time increased at all pH ranges except for pH 8 (no downward trend). In short, this study suggests that the effect of β-CD complex on the stability of anthocyanin antioxidant capacity depends on pH and the susceptibility to the degradation process.

A new triterpene glycoside from the stems of Lagerstroemia indica

Kyeong Wan Woo,Joon Min Cha,Sang Un Choi,Kang Ro Lee 대한약학회 2016 Archives of Pharmacal Research Vol.39 No.5

A bioassay-guided fractionation and chemicalinvestigation of the stems of Lagerstroemia indica resultedin the isolation and identification of a new triterpene glycoside,lagerindiside (1), along with nine known triterpenes(2–10). The structure of this new compound was elucidatedon the basis of 1D and 2D nuclear magnetic resonancespectroscopic data analysis as well as chemical method. The cytotoxic activities of the isolates (1–10) were evaluatedby determining their inhibitory effects on four humantumor cell lines (A549, SK-OV-3, SK-MEL-2, andHCT15) using a sulforhodamine B bioassay. Compounds 3and 4 showed potent cytotoxicity on the tumor cell lineswith IC50 values ranging from 3.38 to 6.29 lM.

Performance Improvement of the Horizontal Control System for a Tractor Implement Using Sensor Signal from the Front Axle

Ro, Young-Min,Moon, Jun-Hee,Kim, Kyeong Uk Korean Society for Agricultural Machinery 2016 바이오시스템공학 Vol.41 No.2

Purpose: Many tractors have adopted the horizontal control system designed to maintain the three-point mounted implements in horizontal position when they are tilted sideways. The control system rotates the implement in the opposite direction to the inclination of rear axle of the tractor. However, the current control system was found to have poor performance in accuracy and response. A new control system was therefore developed to improve the performance. Methods: The new control system was designed to get the response of the implement to be started earlier by using the tilt information from the front axle of the tractor. By this approach, the rotation of the implement can be adjusted as required to make it horizontal at the expected time, even though the response is slow. The optimal values of the control parameters for the new system were determined by computer simulation and validated by a performance test conducted with an obstacle of 120 mm height on a flat concrete surface. The performance of the control system was evaluated by the root mean square error (RMSE) of the rotation angle of the implement with respect to the actual inclination of the rear axle. Results: The new control system reduced the RMSE of the current control system by 44.6% indicating a high performance improvement. The inclination of the front axle was easily obtained from a sensor mounted on the front axle of the tractor and used as input to the new control system. Conclusions: The method of getting the response of the implement to be started earlier by utilizing the inclination information of the front axle can be applied to improve the performance of the current control system at least cost.