컴퓨터 매개통신 (CMC) 학습을 위한 구성주의 교수 설계자

안일철,안미리 한국컴퓨터교육학회 1999 컴퓨터교육학회 논문지 Vol.2 No.1

오늘날의 원격 교육은 급격하게 변하는 새로운 테크놀로지를 교육에 적용하는데 많은 관심이 집중되어 발전되고 있으나 테크놀로지 활용에 따르는 효율성에 대한 연구나 적절한 교수설계에 대한 연구가 미흡하다. 특히 컴퓨터매개통신(Computer Mediated Communication: 이후로는 CMC)을 활용한 원격교육에서의 교육적 활용과 교수설계에 대한 연구가 절실히 필요하다. 과거의 전통적인 교수설계이론과 객관주의적 교육관을 갖고 있는 교사나 교수설계자는 새로운 테크놀로지인 CMC를 통한 효과적인 학습과 교수설계를 지원하지 못하고 있다고 지적되었다. 그러므로 객관주의적 전통적 교육관 중심의 교수 설계에서 훈련된 교육자들은 CMC 교육환경에서 자신들의 교수설계와 교수 방법적인 측면에서 구성주의적 입장으로 재평가할 필요가 있다. 본 논문에서는 효율적인 CMC 학습활동을 교수설계하기 위한 교수설계와 전이의 유동성(feasibility of the transition)에 역점을 둔 교수설계자에 대해 살펴보았고, 원격교육이론에 입각한 구성주의적 요소와 교수설계시 고려되어야할 심리적 사항들을 검토하였다.

초고압차단기의 차단성능을 고려한 시스템 해석에 대한 연구

안일철(Ilchul Ahn),손희상(Heesang Sohn),송태헌(Taehun Song) 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11

광범위 병저항성 유전자발굴 연구동향

안일평,박상렬,황덕주,장안철,배신철 한국육종학회 2012 한국육종학회지 Vol.44 No.4

Disease is one of the devastating obstacles in the stable crop production. Numerous agronomical and chemical controls have been developed to overcome this problem, but the former is not sufficient for the maintaining the disease under the economic threshold level and the latter is not free from the environmental regulation. One of the most ideal solutions is resistance breeding. Resistance breeding has been majorly dependent on the resistance (R) genes conferring race-specific vertical resistance effective for limited populations within the pathogen species harboring avirulence (Avr) genes encoding effectors exactly matching with R gene products. In spite of its outstanding efficiency, improper management of above cultivars frequently resulted in the resistance break down due to the appearance and domination of the new races in the field. During the last two decades, mechanisms of disease resistance have been characterized and analyzed in the respect of genetics, biochemistry, molecular biology, cell biology, and evolution. Especially, a growing body of investigations has been focused on the resistance effective for multiple races or even more species of pathogen’s infections and also durable and long-lasting. In this manuscript, we will introduce the investigations searching for durable and broad-spectrum resistance and the considerations for their applications in the crop production will be presented.

초고압차단기의 동특성 분석을 위한 연성해석

안일철(Ilchul Ahn),박용남(Yongnam Park),송태헌(Taehun Song) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

The Ultra-High Voltage (UHV) Circuit Breaker (CB) is a protective device that applies power to the power system through close - open operations and ensures the stability of the system from breaking fault currents caused by ground fault, shortcircuit, and other accidents. During close - open operation, the circuit breaker operates at high speed and generates a large dynamic force. Also, it is important to accurately evaluate the dynamic characteristics at the design stage because the dynamic characteristics have a great influence on the breaking performance. However, it is difficult to analyze exactly the dynamic characteristics due to the multi-physics condition in which the drive part of the UHV circuit breaker works in combination with mechanisms and fluid-elements. In this study, a co-simulation model of 1D system analysis program was developed based on 3D multi-body dynamics analysis program in order to obtain more accurate results for dynamic characteristics analysis of the drive part of UHV circuit breaker. Using this technique, the dynamic characteristics of UHV circuit breaker products were analyzed and the accuracy was verified.

초고압차단기의 동특성 분석을 위한 연성해석

안일철(Ilchul Ahn),박용남(Yongnam Park),송태헌(Taehun Song) 대한기계학회 2022 대한기계학회 춘추학술대회 Vol.2022 No.11

The Ultra-High Voltage (UHV) Circuit Breaker (CB) is a protective device that applies power to the power system through close - open operations and ensures the stability of the system from breaking fault currents caused by ground fault, shortcircuit, and other accidents. During close - open operation, the circuit breaker operates at high speed and generates a large dynamic force. Also, it is important to accurately evaluate the dynamic characteristics at the design stage because the dynamic characteristics have a great influence on the breaking performance. However, it is difficult to analyze exactly the dynamic characteristics due to the multi-physics condition in which the drive part of the UHV circuit breaker works in combination with mechanisms and fluid-elements. In this study, a co-simulation model of 1D system analysis program was developed based on 3D multi-body dynamics analysis program in order to obtain more accurate results for dynamic characteristics analysis of the drive part of UHV circuit breaker. Using this technique, the dynamic characteristics of UHV circuit breaker products were analyzed and the accuracy was verified.

초고압차단기의 전자석 조작기에 대한 특성 분석

안일철(Il Chul Ahn),신동규(Dong Kyu Shin),백병산(Byung San Baek),주형진(Hyoung Jin Joo),최병화(Byung Hwa Choi) 대한전기학회 2013 대한전기학회 학술대회 논문집 Vol.2013 No.10

개스 유동을 고려한 전동스프링조작기를 가진 GIS의 동역학해석

안일철(I. C. Ahn),배채윤(C. Y. Bae),최종웅(J. U. Choi),오일성(I. S. Oh) 한국정밀공학회 2008 한국정밀공학회 학술발표대회 논문집 Vol.2008 No.6월

초고압차단기의 열유동해석을 고려한 동역학 연성해석기법

안일철(Il-chul Ahn),송태헌(Tae-hun Song),강기랑(Ki-rang Kang) 대한기계학회 2017 대한기계학회 춘추학술대회 Vol.2017 No.11

PCR방법을 이용한 국화흰녹병균 검출

전푸름,박상렬,김정구,안일평,황덕주,배신철 한국화훼산업육성협회 2014 화훼연구 Vol.22 No.4

우리나라의 절화국화는 국내 화훼작물 중 큰 비중을 차 지하고 있다. 수출 또한 2011년에는 2001년대비 약 1.9배 증가하였지만 생산단가 상승과 주변 경쟁국들과의 가격 경쟁력으로 수출농가가 어려움을 겪고 있다. 이를 극복하기 위해서는 소비자의 기회에 맞는 품종을 개발하 고 또한 고품질 국화를 생산하는 것이 필요하다. 국화 품 질을 저하시키는 요인 중 하나는 병해충 감염이며, 국화 흰녹병이 가장 심각한 피해를 주고 있다. 국화흰녹병 병 발생을 근절할 수 있는 근본적인 해결책은 저항성 품종 개발이지만 이는 많은 시간이 필요하기에 단기적 방법으 로 가시적으로 병징이 나타나기 이전에 국화흰녹병 감염 여부를 검정할 수 있는 기술을 개발한다면 병 발생 피 해를 최소화할 수 있을 것이다. 국화흰녹병 검정 기술 개 발을 위해 실험실 조건에서 이병주의 연중 생산이 필수 적이기에 이병주를 생산하는 시스템을 우선적으로 확립 하였다. 그리고 자체 생산한 이병주에서 증식된 병원균 의 담자포자의 형태적 특성 및 rDNA의 DNA 염기서열 분석 결과로 국화흰녹병균임을 입증하였다. 또한 국화흰 녹병균 유전체 정보를 이용하여 국화흰녹병균만을 검출 할 수 있는 유전자를 선발하였고 이 유전자를 대상으로 국화흰녹병균 게놈 DNA 0.25ng까지 검출할 수 있는 프 라이머 쌍을 개발하였다. 동일한 프라이머를 이용하여 Real-time PCR를 실시하면 게놈 DNA 6pg까지 검출이 가능하였다.향후 이러한 방법을 이용하여 병원균 접종후 육안으로 병징이 확인되기 이전에 국화흰녹병균의 검출 을 확인할 예정이다. In South Korea, chrysanthemum cut flowers have a large share in the flower industry and, compared to 2001, the export of chrysanthemum cut flower increased by 1.9 times in 2011. However, Korean growers have faced with difficulty in keeping competitiveness in world chrysanthemum cut flower market due to increase production cost and selling price competition. In order to overcome these problems, it is needed to develop cultivars that consumers demand and to produce cut flower chrysanthemum with high quality. Diseases and insects can cause severe quality problem of cut flower chrysanthemum. The most serious damage is caused by chrysanthemum white rust. The best option to minimize damage caused by white rust is to develop cultivars resistant to chrysanthemum white rust, but it will take so long time to develop a resistant cultivar. Therefore, an alternative way can be development of technique for early detection of infection by chrysanthemum white rust, which can minimize damage of cut flower chrysanthemum. We preferentially established the system for production of white rust susceptible chrysanthemum plants because it is required to supply susceptible plants in laboratories throughout the year to develop the detection technique for white rust. Pathogens sampled from susceptible plants were identified as chrysanthemum white rust through investigation of shape and size of basidiospore using microscope and analysis of rDNA sequence of the pathogen. In addition, the specific gene for chrysanthemum white rust was selected from genome database of Puccinia horiana and 0.25 ng of its genomic DNA could be obtained by PCR using primers designed to target the specific gene of chrysanthemum white rust. Six pg of its genomic DNA could be also amplified by Real-time PCR. In the near future, we will confirm if chrysanthemum white rust can be detected through the PCR method mentioned above before symptom caused by infection of white rust is become visible.

총설 : 단백질 분해가 식물의 진균 병 진전에 미치는 영향

안일평 ( Il Pyung Ahn ),박상렬 ( Sang Ryeol Park ),배신철 ( Shin Chul Bae ) 한국균학회 2010 韓國菌學會誌 Vol.38 No.2

Plant pathogenic fungi are the most diverse and drastic causal agents of crop diseases threatening stable food production all over the world. Plant have evolved efficient innate immune system to scout and counterattack fungal invasion and pathogenic fungi also developed virulence system to nullify plant resistance machinery or signaling pathways and to propagate and dominate within their niche. A growing body of evidences suggests that post translational modifications (PTMs) and selective/nonselective degradations of proteins involved in virulence expression of plant pathogenic fungi and plant defense machinery should play pivotal roles during the compatible and incompatible interactions. This review elucidates recent investigations about the effects of PTMs and protein degradations on host defense and fungal pathogens` invasions.