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홍정표(Jungpyo Hong),김희준(Heejun Kim),이현우(Hyunwoo Lee) 대한지질학회 2021 대한지질학회 학술대회 Vol.2021 No.10
2016년 경주 지진과 2017년 포항 지진 이후 지진 재해를 유발할 수 있는 활성단층의 분포에 대한 연구가 활발하게 이루어지고 있다. 특히 두 지진이 발생했던 한반도 동남권에는 인구와 산업시설이 밀집되어 있어 지진 발생시 큰 피해가 예상되므로 이 지역의 활성단층의 분포를 이해하는 것이 중요하다. 본 연구에서는 양산 단층대의 자연 용출수와 인근 하천의 토양에서 이산화탄소 플럭스 측정 및 탄소동위원소 분석을 수행하였다. 플럭스 측정 결과, 양산단층 북부 지역인 영덕 및 포항 일대에는 높은 플럭스(98~77,699 g m<SUP>-2</SUP> d<SUP>-1</SUP>)를 동반한 자연 용출수가 주로 위치하였고, 중부 지역인 경주 일대에서는 형산강을 따라 토양에서 높은 플럭스(0.5~1,240 g m<SUP>-2</SUP> d<SUP>-1</SUP>)가 측정되었다. 탄소동위원소 성분(δ<SUP>13</SUP>C-CO₂)은 자연 용출수에서는 -14.03~-7.44‰, 토양에서는 -22.82~-13.53‰의 범위를 보이며, 이는 자연 용출수를 통해 심부 기원의 이산화탄소가 유출되고, 형산강을 중심으로 단층대를 따라 형성된 토양에서는 천부 생물학적 기원의 이산화탄소가 배출되는 것을 의미한다. 따라서 본 연구는 양산 단층대가 활성 단층으로서 심부까지 연결되어 있으며, 단층 활동에 따른 퇴적 분지 형성으로 심부 및 천부 기원이 혼합된 이산화탄소가 배출되고 있다는 것을 제안한다.
제품디자인에 있어 전형성과 심미성요소(균형, 리듬)의 상호작용과 조절변수에 의한 사용자의 심미적 반응에 관한 연구
홍정표 ( Hong Lung Pyo ),조경숙 ( Cho Kyoung Sook ) 한국감성과학회 2004 추계학술대회 Vol.2004 No.-
Recently, design has emerged as a key factor of successful product development. This study reviewed the elements of shape with a view point of addressing and defining the elements of aesthetics and how they influence consumer aesthetic response. Though past researches related to shape aesthetics reported that shape aesthetics exist as a single element with other sub-elements, this research made further investigations into shape aesthetics and reported that form aesthetics in product design can be broadly divided into form aesthetics and content aesthetics. Empirical studies on each category was undertaken and from the results obtained, it was concluded that typicality is a dominant element in content aesthetics while balance are a dominant element in form aesthetics. Also, the study investigated the effect of conditional variables such as price and people on each category and it was observed that both content and form aesthetics elements are affected by conditional variables such as price, people. Furthermore, the study reports that both content and form aesthetics elements are mutually correlated and both categories affect user``s aesthetics response. It is intended that the results obtained from this work will contribute to theoretical knowledge of aesthetic elements and can be put to use by product design and manufacturing companies.
새로운 방식의 단상 인버터를 이용한 태양광 시스템 구현
홍정표(Jeng-Pyo Hong),김태화(Tae-Hwa Kim),원태현(Tae-Hyun Won),권순재(Soon-Jae Kwon),홍순일(Soon-Ill Hong),김종달 전력전자학회 2006 전력전자학술대회 논문집 Vol.- No.-
In this paper proposed method of maximum power point tracking using boost converter for a connected single phase inverter with photovoltaic system. The maximum power point tracking control is based on generated circuit control MOSFET switch of boost converter and single phase inverter uses predicted current control to control four IGBT's switch in full bridge. The predicted current control provide current with sinusoidal wave shape and inphase with voltage. The generation control circuit allows each photovoltaic module to operate independently at peak capacity, simply by detecting of the output power of the system. Furthermore, the generation control circuit attenuates low-frequency ripple voltage, which is caused by the full-bridge inverter, across the photovoltaic modules. Consequently, the output power of system is increased due to the increase in average power generated by the photovoltaic modules. The effectiveness of the proposed inverter system is confirmed experimentally and by means of simulation.
홍정표(Jengpyo Hong),정영석(Youngseok Jung),천동필(Dongpil Chun) 한국자동차공학회 2004 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
Currently, the BLDC Motor(Blushless Direct Current Motor) is widely used for the industrial applications because of its high efficiency, high power density and low acoustic noise. However, in the area of an automotive application, the usage of the BLDC motor is starting to increase. Thus, we develop the BLDC fan motor control ECU for vehicle. A BLDC fan motor manufactured by TEMlC and rating 800[W]/13[V] is targeted for our control module application. The usefulness of the developed BLOC fan motor control ECU is verified by experiments.
영구자석형 전동기의 구동방법에 따른 전자기적 특성 및 진동 소음 비교
홍정표(Jung- Pyo Hong),이수진(Su-Jin Lee),김도진(Do-Jin Kim),이병화,장우교(Woo-Kyo Jang) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.10
This paper presents a result of the mechanical noise and vibration analysis as well as the electrical characteristics analysis of the permanent magnet (PM) motor according to the driving method that is Brushless DC (BLDC) drive and Brushless AC (BLAC) drive. To do that, the characteristics of the PM motor, which have the same output power but different driving method, are investigated. At that time, the characteristics such as torque, torque ripple and flux density, and so on, are obtained by finite element analysis (FEA). Besides, noise and vibration are obtained by spectrum analysis. The magnetic noise is defined as noise generated from vibrations due to electromagnetic excitation force. In this paper, the electromagnetic excitation force is analyzed and design process of noise reduction is proposed. Finally, The validity of the analysis results is verified by test.