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김영헌(Young Heon Kim),오제훈(Je Hoon Oh),신금철(Kum Cheol Shin),윤민재(Min Jae Yoon),민병권(Byeong Gwon Min),박진규(Jin Gyu Park) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11
As automotive industry become quieter, the interest in the wiper is increasing. The wiper system of a car is carried out the wiping of the windshield for securing a clear view. The most of complaints of wiper concern operation noise. The noise operation can be classified into three main categories namely, chattering, reversal vibration and squeal noise. In this paper, we focus on reversal vibration mainly occurred by reversal action. We use commercial software ANSYS for finite element analysis (FEA). The real behavior of wiper blade was observed by high speed camera (HSC). To reduce operation noise caused by reversal vibration, we use design of experiment (DOE) method for important variables such as friction coefficient, input force and damping coefficient.
Westerdykella reniformis: A New Record from Field Soils in Korea
( Mahesh Adhikari ),( Sang Woo Kim ),( Byeong Heon Gwon ),( Han Jun Ju ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2020 韓國菌學會誌 Vol.48 No.1
During a survey of fungal diversity in different provinces of South Korea in 2017, a new fungal isolate was discovered. This fungal isolate was identified as Westerdykella reniformis, based on its morphological characteristics and phylogenetic analysis, using internal transcribed spacer (ITS) and 28S ribosomal DNA (28S rDNA) sequence data. To our knowledge, W. reniformis has not previously been reported in South Korea. Thus, in this study, we report a new record of a species from the Dothideomycetes class in Korea, and provide a detailed description with morphological illustrations.
저온플라즈마(Microwave Plasma)를 활용한 Acidovorax citrulli 감염 수박종자의 살균 효과 검정
김상우(Sang Woo Kim),주한준(Han Jun Ju),권병헌(Byeong Heon Gwon),마헤시 아드히카리(Mahesh Adhikari),김현승(Hyun Seung Kim),박미리(Mi-Ri Park),이윤수(Youn Su Lee) 한국식물병리학회 2021 식물병연구 Vol.27 No.1
본 연구에서는 마이크로웨이브 플라즈마(microwave plasma) 를 이용하여 종자에 감염된 Acidovorax citrulli 11-251의 살균 효과를 확인하였다. 감압처리를 통하여 수박 종자에 A. citrulli 11-251를 인공접종하여 이병 종자를 제작하였으며, Aac Im- munoStrip 및 scanning electron microscope 확인 결과, 종피 및 종자 내부에 1×107/30분 처리한 조건에서 감염되었음을 확 인하였다. 플라즈마 처리는 50 W (3분, 5분, 10분), 80 W (3분, 5 분, 10분), 100 W (3분, 5분, 10분) 조건으로 실험 결과, 인공감염 종자를 플라즈마 처리 시 대조구와 비교해보면 종피의 경우 80 W/10분, 99.56%의 살균 효과를 보였고, 종자 내부는 80 W, 100 W/10분, 100%의 높은 살균 효과를 보였다. 인공접종 종자를 사용하여 플라즈마 살균장치의 종자살균 효과를 확인하였다. 하지만 발아율은 무처리구보다 플라즈마 처리 시 급격히 떨어 지는 것을 확인하였다. 주사전자현미경 관찰 결과, 플라즈마 처 리가 A. citrulli 11-251의 세포막을 파괴하는 것을 확인하였다. 또한, A. citrulli가 접종된 수박 종자를 이용하여 플라즈마 처리 시 살균 및 발아율을 높일 수 있는 최적 조건에 대한 추가 실험이 수행될 예정이다. This study was conducted to check the sterilization efficacy of microwave plasma (MWP) against the water- melon seeds infected with Acidovorax citrulli 11-251. Watermelon seeds were artificially vacuum inoculated to produce A. citrulli 11-251 infected seeds. Aac ImmunoStrip and scanning electron microscope (SEM) results suggests that, seeds (coat and endosperm) were infected under the concentration of 1×107/30 min. MWP sterlization process was carried out at 50 W (3 min, 5 min, and 10 min), 80 W (3 min, 5 min, and 10 min), and 100 W (3 min, 5 min, and 10 min). According to the results, MWP sterilized the artificially inoculated seed coats by 95.96% at 80 W/10 min and seed endosperms by 100% at 100 W/10 min respectively. Although, seeds were sterlized by MWP, germination rate of seeds were low as compared to non treated (negative control) seeds. Moreover, cell membrane of A. citrulli 11-251 was damaged while observed in SEM after sterilized with MWP. Further studies regarding the appropriate sterilization condition by MWP against A. citrulli infected seeds for germination will be conducted in our next study.
조화현,최철호,권병헌,최명렬,Jo, Hwa-Hyeon,Choe, Cheol-Ho,Gwon, Byeong-Heon,Choe, Myeong-Ryeol 한국정보처리학회 2000 정보처리논문지 Vol.7 No.6
In this paper, we have proposed the contrast control method for improving image quality. The proposed method can be easily applied to the FPD (flat panel display) which requires real-time processing because of its lower hardware complexity that the conventional methods. In addition, it can flexibly control the contrast of input image by arraying the weight values that control the contrast range. Visual test and standard deviation of their histograms have been introduced to evaluate the results of proposed method and the original images. The functional operation of he proposed method has been verified using the SYNOPSYS VHDL tool and computer simulation. Its results show that he proposed method might be very suitable for real-time processing on the FPD.
( Sun Kumar Gurung ),( Mahesh Adhikari ),( Sang Woo Kim ),( Hyun Goo Lee ),( Ju Han Jun ),( Byeong Heon Gwon ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2019 韓國菌學會誌 Vol.47 No.3
During a survey of fungal diversity in Korea, two fungal strains, KNU17-1 and KNU17-199, were isolated from paddy field soil in Yangpyeong and Sancheong, respectively, in Korea. These fungal isolates were analyzed based on their morphological characteristics and the molecular phylogenetic analysis of the internal transcribed spacer (ITS) rDNA sequences. On the basis of their morphology and phylogeny, KNU17-1 and KNU17-199 isolates were identified as Albifimbria verrucaria and Deconica coprophila, respectively. To the best of our knowledge, A. verrucaria and D. coprophila have not yet been reported in Korea. Thus, this is the first report of these species in Korea.
A new record of Trichocladium griseum in Korea: morphological and molecular characterization
( Setu Bazie Tagele ),( Thuong T. T. Nguyen ),( Sang Woo Kim ),( Mahesh Adhikari ),( Sun Kumar Gurung ),( Hyun Goo Lee ),( Byeong Heon Gwon ),( Han Jun Ju ),( San Kosol ),( Hyang Burm Lee ),( Youn Su 한국균학회 2019 韓國菌學會誌 Vol.47 No.2
A unrecorded species of Trichocladium, Trichocladium griseum, was isolated in 2017 during a survey of fungal diversity in Ulsan province, South Korea. This species was identified based on morphological characteristics and phylogenetic analysis of the internal transcribed spacer (ITS) rDNA and β-tubulin gene sequences. T. griseum has not yet been reported in South Korea. Thus, we report for the first time a new record of Trichocladium griseum in Korea, and we include the descriptions and morphological illustrations of this fungus.
A New Record of Nannizziopsis mirabilis from Field Soil in Korea
( Mahesh Adhikari ),( Sun Kumar Gurung ),( Sang Woo Kim ),( Hyun Goo Lee ),( Han Jun Ju ),( Byeong Heon Gwon ),( San Kosol ),( Setu Bazie ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2018 韓國菌學會誌 Vol.46 No.3
Nannizziopsis mirabilis (KNU17-67) was isolated from a field soil sample collected from Jejudo in 2017. This fungal isolate was identified and described by its morphological characters and the internal transcribed spacer rDNA gene sequencing. Potato dextrose agar medium was used to study its macro and micromorphology. In addition, a molecular phylogenetic tree was constructed for its precise confirmation as N. mirabilis . This fungal isolate has not officially been reported previously in Korea.
이윤경,한승완,이석준,정병호,양대헌,권태경,Lee, Yun-Gyeong,Han, Seung-Wan,Lee, Seok-Jun,Jeong, Byeong-Ho,Yang, Dae-Heon,Gwon, Tae-Gyeong 한국전자통신연구원 2008 전자통신동향분석 Vol.23 No.4
인터넷 이용이 활성화 되면서 각종 웹 서버에서의 개인정보 과다 수집 및 노출이 큰 이슈가 되고 있다. 인터넷이 우리 생활에 주는 편리함을 그대로 누리면서 개인정보를 보호할 수 있는 방안으로 익명 인증 기술이 있을 수 있다. 익명 인증은 익명성을 제공하는 디지털 서명을 이용한 인증 방법이다. 익명성을 제공하는 디지털 서명 방법은 전자화폐와 전자투표 시스템 등의 응용을 위해서 주로 연구되어 왔으나, 최근에는 인터넷 환경에서 개인정보 보호를 위한 익명 인증 방법의 하나로써 연구되고 있다. 본 고에서는 익명성을 제공하는 전자서명 방법에 관하여 소개하고, 이들 전자서명 방법 중 익명 인증을 위해서 가장 많은 연구가 되고 있는 그룹 서명 방법의 최근 연구동향에 관하여 기술하고자 한다.
Aspergillus caninus (Syn: Phialosimplex caninus): a New Isolate from Field Soils in Korea
( Mahesh Adhikari ),( Sun Kumar Gurung ),( Sang Woo Kim ),( Hyun Goo Lee ),( Han Jun Ju ),( Byeong Heon Gwon ),( San Kosol ),( Setu Bazie ),( Hyang Burm Lee ),( Youn Su Lee ) 한국균학회 2018 韓國菌學會誌 Vol.46 No.4
During the study of indigenous fungal communities in soil samples collected from various field soils in Sancheong, Gyeongsangnam-do, Korea in 2017, several species of Aspergillus were discovered. Aspergillus caninus (KNU17-7) was isolated, identified, and described based on the results from macro and micro morphological characteristics and molecular characterization. Morphologically, it was identified using five different growth media: potato dextrose agar, oatmeal agar, yeast extract sucrose agar, czapek yeast extract agar, and malt extract agar. For the molecular identification, sequencing of internal transcribed spacer, β-tubulin, and calmodulin genes was performed. Based on this characterization, our study isolate was identified as Aspergillus caninus. This fungal species has not been officially reported in Korea before, and we report here with its morphological and molecular phylogenetic characterization.