Development of Tobacco Mosaic Virus (TMV) resistant Flue-cured $\textrm{F}_1$ Hybrid, KF118

Chung, Yun-Hwa,Keum, Wan-Soo,Park, Sang-Ju,Jung, Suk-Hum,Kim, Yong-Am,Kang, Yue-Gyu,Chung, Youl-Young,Cho, Soo-Heon The Korean Society of Crop Science 2003 Korean journal of crop science Vol.48 No.5

Tobacco mosaic virus (TMV), TMV-common strain, causes severe damage at growth, yield and leaf quality on flue-cured tobacco in Korea. Controlling TMV outbreak with cultivating practices and chemicals are limited, thus, the best way would be developing TMV resistant variety. A new flue-cured hybrid, KF118, was developed from a cross of maternal parent MSTC175 and TC853 at the Agro-tech. Research Group, KT&G Central Research Institute. KF118 exhibited more vigorous growth characteristics in early stage than that of NC82, standard variety in Korea, while other characters were favorable to those of NC82, It is highly resistant to TMV and bacterial wilt(Ral-stonia solanacerum), and black shank(phytophthora parasitica var. nicotianae) is comparable to that of NC82. It should adapt well to the flue-cured production area, and can reduce premature flowering under unfavorable weather conditions. Yield of KF118 is 1 to 2% higher, and leaf quality is 4% higher than NC82. Fl hybrid, KF118, met acceptable standards for chemical and physical characteristics of cured leaf, and ranked high in good smoking taste by panel members in KT&G.

Spider Invasion Across the Galaxy

Chung-Yue Hui 한국우주과학회 2014 Journal of Astronomy and Space Sciences Vol.31 No.2

The nature of the exotic stellar corpses which reincarnate by consuming their companion is reviewed. Apart from sucking life from their partners, they are actually eating the doomed companions away by their deadly and powerful particle/radiation beams. Such situation resembles that a female “black widow” spider that eats its mate after mating. These celestial zombies are called - Millisecond pulsars (MSPs). In this review article, I will focus on the effort of Fermi Asian Network (FAN) in exploring these intricating objects over the last five years. Two special classes of MSPs are particularly striking. Since Fermi Gamma-ray Space Telescope has started surveying the gamma-ray sky, the population of “black widows” has been boosted. Another dramatic class is so-called “redbacks” (Australian cousin of “black widows”) which has just emerged in the last few years. These MSPs provide us with a long-sought missing link in understanding the transition between accretion-powered and rotation-powered systems. The strategy of hunting MSPs through mulitwavelength observations of the unidentified Fermi objects is also reviewed.

A GOLDEN DECADE OF GAMMA-RAY PULSAR ASTRONOMY

Chung-Yue Hui 한국천문학회 2018 Journal of The Korean Astronomical Society Vol.51 No.6

To celebrate the tenth anniversary since the launch of {\it Fermi} Gamma-ray Space Telescope, we take a retrospect to a series of breakthroughs {\it Fermi} has contributed to pulsar astronomy in the last decade. Apart from significantly enlarging the population of $\gamma-$ray pulsars, observations with the Large Area Telescope onboard {\it Fermi} also show the population is not homogeneous. Instead, many classes and sub-classes have been revealed. In this paper, we will review the properties of different types of $\gamma-$ray pulsars, including radio-quiet $\gamma-$ray pulsars, millisecond pulsars, $\gamma-$ray binaries. Also, we will discuss the prospects of pulsar astronomy in the high energy regime.

아동 공격성에 영향을 미치는 유발변인 및 억제변인에 대한 메타분석

리우위에(Yue Liu),정정희(Chung, Chung-Hee),조하영(Jo, Ha-Yeong) 한국열린유아교육학회 2021 열린유아교육연구 Vol.26 No.2

본 연구는 메타분석을 통해 아동 공격성에 영향을 미치는 변인들을 종합적으로 분석하는 데 목적이 있어 초등학생을 대상으로 연구를 실시하였다. 자료 수집은 1차 2019년 11월경, 2차 2021년 1월경에 추가검색 하였으며, PRISMA 기준에 따라 최종 47편의 국내연구가 메타분석에 포함되었다. 분석 결과는 첫째, 공격성 전체에 대한 유발변인 및 억제변인 효과크기를 살펴보았을 때, 개인내적변인, 학교환경변인, 가족환경변인 순으로 나타났다. 둘째, 공격성 유형별 유발변인의 효과크기는 언어적 공격성과 신체적 공격성은 개인내적변인의 효과크기가 가장 크지만 관계적 공격성은 학교환경변인이 가장 큰 효과크기를 보였다. 반면 억제변인의 효과크기는 언어적 공격성과 신체적 공격성은 학교환경변인의 효과크기가 가장 크게 나타났으며, 관계적 공격성은 가족환경변인이 가장 큰 효과크기를 가지는 것으로 나타났다. 이러한 결과를 통해 아동의 공격성에 영향을 미치는 긍정적, 부정적 변인의 효과크기를 정확하게 파악할 수 있고 구체적인 해결책을 찾아 가정과 학교 등 아동의 공격성을 예방하고 줄이는 데 도움이 되기를 기대한다. Analytical data collection was conducted two times in November 2019 and January 2021, and also The purpose of this study is to comprehensively analyze the factors that affect aggression of toddler using meta-analysis. Analytical data collection was conducted two times in November 2019 and January 2021, and also 47 studies were included in the meta-analysis by the PRISMA standard. The results of the study were as follows: First, When looking at the magnitude of the effect of triggering and suppressing variables on the entire aggression, individual internal variables, school environment variables, and family environment variables were shown in order. Second, the effect size of the Triggering variables of each aggression type is that language aggression and physical aggression are the most effective internal variables, but relational aggression was the biggest predictor of the school environment. The inhibitory factors showed that language aggression and physical aggression are affect by embodiment of the effect of school environment variables the biggest, and relational aggression is the biggest affects of family environment variables. These results show that there are significant differences in variables and inhibitory factors among different types of aggression. Regarding these results, it is expected that the magnitude of the effect of positive and negative variables affecting children"s aggression can be accurately grasped, and concrete solutions will be found to help prevent and reduce the aggression of children such as homes and schools.

High Energy Observational Investigations of Supernova Remnants and their Interactions with Surroundings

Hui, Chung-Yue 한국우주과학회 2013 Journal of Astronomy and Space Sciences Vol.30 No.3

Here we review the effort of Fermi Asian Network (FAN) in exploring the supernova remnants (SNRs) with state-of-art high energy observatories, including Fermi Gamma-ray Space Telescope and Chandra X-ray Observatory, in the period of 2011- 2012. Utilizing the data from Fermi LAT, we have discovered the GeV emission at the position of the Galactic SNR Kes 17 which provides evidence for the hadronic acceleration. Our study also sheds light on the propagation of cosmic rays from their acceleration site to the intersteller medium. We have also launched an identification campaign of SNR candidates in the Milky Way, in which a new SNR G308.3-1.4 have been uncovered with our Chandra observation. Apart from the remnant, we have also discovered an associated compact object at its center. The multiwavelength properties of this X-ray source suggest it can possibly be the compact binary that survived a supernova explosion.

Spider Invasion Across the Galaxy

Hui, Chung-Yue The Korean Space Science Society 2014 Journal of Astronomy and Space Sciences Vol.31 No.2

The nature of the exotic stellar corpses which reincarnate by consuming their companion is reviewed. Apart from sucking life from their partners, they are actually eating the doomed companions away by their deadly and powerful particle/radiation beams. Such situation resembles that a female "black widow" spider that eats its mate after mating. These celestial zombies are called - Millisecond pulsars (MSPs). In this review article, I will focus on the effort of Fermi Asian Network (FAN) in exploring these intricating objects over the last five years. Two special classes of MSPs are particularly striking. Since Fermi Gamma-ray Space Telescope has started surveying the gamma-ray sky, the population of "black widows" has been boosted. Another dramatic class is so-called "redbacks" (Australian cousin of "black widows") which has just emerged in the last few years. These MSPs provide us with a long-sought missing link in understanding the transition between accretion-powered and rotation-powered systems. The strategy of hunting MSPs through mulitwavelength observations of the unidentified Fermi objects is also reviewed.

Development of Tobacco Mosaic Virus (TMV) resistant Flue-cured F₁ Hybrid, KF118

Yun-Hwa Chung,Wan-Soo Keum,Sang-Ju Choi,Suk-Hun Jung,Yong-Am Kim,Yue-Gyu Kang,Youl-Young Chung,Soo-Heon Cho 韓國作物學會 2003 Korean journal of crop science Vol.48 No.5

Tobacco mosaic virus (TMV), TMV-common strain, causes severe damage at growth, yield and leaf quality on flue-cured tobacco in Korea. Controlling TMV outbreak with cultivating practices and chemicals are limited, thus, the best way would be developing TMV resistant variety. A new flue-cured hybrid, KF118, was developed from a cross of maternal parent MSTC175 and TC853 at the Agro-tech. Research Group, KT&G Central Research Institute. KF118 exhibited more vigorous growth characteristics in early stage than that of NC82, standard variety in Korea, while other characters were favorable to those of NC82, It is highly resistant to TMV and bacterial wilt(Ral-stonia solanacerum), and black shank(phytophthora parasitica var. nicotianae) is comparable to that of NC82. It should adapt well to the flue-cured production area, and can reduce premature flowering under unfavorable weather conditions. Yield of KF118 is 1 to 2% higher, and leaf quality is 4% higher than NC82. Fl hybrid, KF118, met acceptable standards for chemical and physical characteristics of cured leaf, and ranked high in good smoking taste by panel members in KT&G.

Mortality Related to Extreme Temperature for 15 Cities in Northeast Asia

Chung, Yeonseung,Lim, Youn-Hee,Honda, Yasushi,Guo, Yue-Liang Leon,Hashizume, Masahiro,Bell, Michelle L.,Chen, Bing-Yu,Kim, Ho Wolters Kluwer Health, Inc. All rights reserved. 2015 Epidemiology Vol.26 No.2

BACKGROUND:: Multisite time-series studies for temperature-related mortality have been conducted mainly in the United States and Europe, but are lacking in Asia. This multisite time-series study examined mortality related to extreme temperatures (both cold and hot) in Northeast Asia, focusing on 15 cities of 3 high-income countries. METHODS:: This study includes 3 cities in Taiwan for 1994–2007, 6 cities in Korea for 1992–2010, and 6 cities in Japan for 1972–2009. We used 2-stage Bayesian hierarchical Poisson semiparametric regression to model the nonlinear relationship between temperature and mortality, providing city-specific and country-wide estimates for cold and heat effects. Various exposure time frames, age groups, and causes of death were considered. RESULTS:: Cold effects had longer time lags (5–11 days) than heat effects, which were immediate (1–3 days). Cold effects were larger for cities in Taiwan, whereas heat effects were larger for cities in Korea and Japan. Patterns of increasing effects with age were observed in both cold and heat effects. Both cold and heat effects were larger for cardiorespiratory mortality than for other causes of death. Several city characteristics related to weather or air pollution were associated with both cold and heat effects. CONCLUSIONS:: Mortality increased with either cold or hot temperature in urban populations of high-income countries in Northeast Asia, with spatial variations of effects among cities and countries. Findings suggest that climate factors are major contributors to the spatial heterogeneity of effects in this region, although further research is merited to identify other factors as determinants of variability.

Optical and Electrical Properties of RF-Sputtered Indium Zinc Oxide Films

Yue Long Li,Han Na Cho,Su Ryun Min,Sung Keun Lim,Chee Won Chung 한국공업화학회 2007 Journal of Industrial and Engineering Chemistry Vol.13 No.5

Relationship between the Population of Ralstonia solanacearum in Soil and the Incidence of Bacterial Wilt in the Naturally Infested Tobacco Fields

Chung, Yun-Hwa,Yu, Yun-Hyun,Kang, Yue-Gyu The Korean Society of Plant Pathology 2004 Plant Pathology Journal Vol.20 No.4

The population of Ralstonia solanacearum (Rs) in soil is very important as a primary inoculum source of bacterial wilt in tobacco fields. To investigate the population of Rs, physical properties and chemical components during the tobacco growing season, soil samples were taken from the fifteen fields which were located in the flue-cured tobacco growing area, Ansung, Kyunggi province and Wonju, Kangwon province. Two fields of the fifteen were bacterial wilt free. Six fields had less than 10% plants being diseased and seven over 10%. The Rs population level determined by using SMSA medium generally showed an up-and-down pattern being low in May, high in Jun and July and low in August. The soil population in May and June showed a positive correlation with the incidence of bacterial wilt (r=0.571$^*$, r=0.688$^{**}$), but P$_2O_5$, content of soil was negatively correlated with the disease incidence (r=-0.539$^*$). These results suggest that Rs population in soil examined in May or in June, and the P$_2O_5$ content in soil should be key factors to determine the bacterial wilt potential of tobacco fields.