• Korean Journal Plant Pathology
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• v.3 no.3
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• pp.174-179
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• 1987

Four thousand eight hundred and eighty five isolates of Pyricularia oryzae were obtained from the diseased rice specimens collected from various areas of Korea for race identification during 1978 - 1985. A total of 15 races inculding 6 races pathogenic to Tongil lines, 2 T-races, 5 C-races and 2 N-races was identified using a old Japanese differential set during 1978-1980. Since 1981, number of races identified by a Korean differential set was 18 races which were composed of 11 KI-races pathogenic to either Tongil lines or Japonica cultivars and 8 KJ-races pathogenic to only Japonica cultivars. The prevalent race was $N-2^{+t}$ during 1978-1979 and race KJ-301 since 1980, respectively. Races KI-315a and KI-315b pathogenic to most of Tongil lines were identified in 1983. being widely distributed to date. Races KJ-105 and KJ-201 pathogenic to the cultivars possessing resistance genes Pi-k and Pi-i were prevalent in Gangweon province, whereas race KI-315b was prevalent in Chungbug and Jeonnam districts.

• Korean journal of applied entomology
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• v.14 no.4 s.25
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• pp.199-204
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• 1975

One thousand forty-four isolates of Pyricularia oryzae obtained during the period 1962-1974 front blast-infected rice samples from all rice-growing areas of Korea were tested on the Japanese differential set of twelve rice varieties. Twenty-seven races of the fungus were differentiated. The number of races falling in groups T,C and N were 4, 15 and 8, respetively. Since only Japonica type varieties had been cultivated widely before 1966, N-race groups were found to be most Prevalent with a frequency of about $85\%$ of the total isolates. After 1966, T-and C-race groups gradually increased to $21\%$ and $42\%$ respectively, as a result of the widespread cultivation of Tongil bred from a cross between IR8 x(Yukara x T(N)1. Before 1966, a few T, and C-race groups occurred only in the Suweon region; since 1966, most of the races differentiated have been uniformly distributed throughout the country regardless of region. The most prevalent races in Korea were N-2 and C-8. The variety Tetep was resistant to all races previously identified in Korea, but a new race (T-d) to which Tetep is susceptible has been found each year since 1973. It appears likely that races capable of attacking Indica types of rice will become increasingly prevalent and a programme of continuous screening is needed to detect new races as soon as they appear.

• Journal of Korea Multimedia Society
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• v.5 no.6
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• pp.712-729
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• 2002

In this study, we evaluated degree of importance of e-marketplace solution selection factors. Factor analysis was conducted to find out relationships among various variables which come from literature survey. The result shows that 16(sixteen) -selection variables regarding solution characteristics could be grouped into four areas 'flexibility', 'ease of use', 'security', and 'economy'. And 11(eleven) selection variables regarding to vendor characteristics could be grouped into three areas, 'vendor's support', vendor's general situation', and 'vendor's business accomplishment`. Through various analysis, we found important factors for 3 types of operational companies, buyer-biased, seller biased and neutral. 'Security for data item' was showed as the most important factor for all kind of B2B operational companies. For buyer-biased companies, additional supporting manpower, solution education, and educational cost are shown to be more important factors than others. Place of education, education hours and education level are important for 'Neutral' companies. And the factor 'market share of vendor' are important for 'seller biased' companies.

• Current Research on Agriculture and Life Sciences
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• v.5
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• pp.112-118
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• 1987

This experiment was conducted to obtain the basic information for the effective control of rice blast. Eleven races of Pyricuiaria oryzae were identified, 5 races of KJ group and 6 races of KI group in Kyungpook province. Among them KJ301 was the most dominant one, and they were prevailed in the order of KJ401, KJ201, KJ101, KJ105, KI307 and $KI315^b$. The distribution ratio of KI group race was higher in the middle and northern region than the southern and coastal region. A positive correlation was found between the distribution ratio of KI group races and cultivated area of indica type cultivals. The total ratio of Blasticidin-S resistant isolates in P. oryzae was 31.2%. The distribution ratios of resistant isolates were 43.2% in the southern region, 29.4% middle, 25.0% nothern and 10.5% coastal region, respectively. The distribution ratio of Blasticidin-S resistant Isolates was correlated positively with amounts of the chemical sprayed, but not correlated with the race of P. oryzae.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2008.11a
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• pp.55-58
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• 2008

IPTV 기반의 이러닝 마켓플레이스는 IPTV를 통한 이러닝 서비스 제공을 하기 위한 교육 콘텐츠 공급자와 수요자간의 마켓플레이스로써, 이는 양방향 매체 하에서의 이러닝 서비스로써 많은 관심의 대상이 되고 있으며, 방송통신융합의 초기 단계에서 IPTV는 다양한 콘텐츠와 서비스 모델의 개발을 통하여 그 효용성을 높이는데 기여를 할 수 있을 것이다. 본 논문에서는 IPTV기반의 이러닝 마켓플레이스에서 핵심적인 프레임워크를 구성하기 위하여 이러닝, e-마켓플레이스, IPTV에서의 특징과 기존의 이러닝 마켓플레이스들의 기능을 매트릭스를 통한 비교분석으로 기본요소를 추출하고, 이를 통하여 프레임워크를 구성한다. 또한 비즈니스모델 개발을 위하여 비즈니스모델설정, 참여자/역할, 제품/서비스 커버리지, 운영시나리오, 수익모델을 작성하고 이를 통하여 실제적으로 비즈니스모델의 구현이 가능한지를 검증한다.

• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.333-336
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• 2006

E-marketplace is a kind of B2B e-Business system that supports business transactions among companies. If e-marketplace is revitalized, we expect not only the development of related industry but also decrease of transaction cost among companies. It is necessary for the introduction and revitalization of e-marketplace in tourist industry from this point of view. Participants of tour e-marketplace are tour-related companies(travel agencies, lodging enterprises, shipping enterprises, etc.). Also tourists want to search a variety of tour products or contents. So tour e-marketplace has characteristics of B2C e-Business systems as well as B2B e-Business systems at once. The purpose of this study is to classify success factors that determine characteristics of tour e-marketplace through statistics survey from e-marketplace factors related tourism websites. First of all, we analyze success factors of B2B and B2C e-marketplace. Then we will set up influence factors of tour e-marketplace and conduct a survey about success factors of tour e-marketplace. Therefore, we could expect to find these good attributes in tour e-marketplace success through logistic regression and decision tree analysis from source data.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.50 no.3
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• pp.151-155
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• 2005

This study was carried out to get information for diversifying of resistant genes to bacterial blight (BB) in Japonica cultivar breeding programs. TWo hundred nine rice varieties were tested for qualitive resistance to four races of BB; HB9101 isolate for race K1, HB9102 isolate for race K2, HB9103 isolate for race K3, and HB01001 isolate for race K3a. Two hundred nine rice varieties were divided into five groups according to their race reaction. Fourteen Tongil-type varieties and ninetyseven Japonica varieties showed susceptible reaction to four races; Kl, K2, K3 and K3a. Thirteen Tongil-type varieties and thirty-one Japonica varieties were resistant to only one race; K1. Nine Tongil-type varieties and one Japonica variety were resistant to two races; K1 and K2. One Tongil-type variety and twenty-eight Japonica varieties were resistant to the three races; K1, K2, and K3. Fourteen Tongil-type varieties and one Japonica variety were resistant to four races; K1, K2, K3, and K3a. A number of Tongil-type varieties showed broad spectrum resistance to four races, while a number of Japonica varieties showed broad spectrum resistance to three races; K1, K2, and K3.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.350-353
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• 2004

전자상거래 시장을 주도하고 있는 525 전자상거래 시장은 인터넷 매체의 고속 성장과 함께 빠른 속도로 발전해 오고 있다. 이러한 상황 가운데 B2B 전자상거래에 참여하는 기업 간에 상호 협동의 거래를 유지하고 기업들의 가격 경쟁력을 높일 수 있는 방안이 필요하게 되었다. 기존 이-마켓플레이스의 경우 이-마켓플레이스 자체에서 대부분의 거래가 이루어짐으로써 이-마켓플레이스에 소속된 입점 업체가 독립성을 가지지 못하고, 입점 업체간의 발전적인 경쟁체제가 형성되지 못해 입점 업체간의 시너지 효과가 부족한 문제점이 있었다. 따라서 본 논문에서는 기업간 전자상거래의 한 형태인 전자부품 이-마켓플레이스를 대상으로 하여 위의 문제점을 해결해 보고자 한다. 전자 부품은 라이프사이클이 짧아 하나의 입점업체가 많은 양의 재고를 가질 경우 불응재고가 많아지는 문제점이 있지만 특성상 다품종 소량이기 때문에 기업간 재고 공유를 통해 불용재고 해소 방지가 가능하다. 따라서 기업간의 재고 공유를 통한 적극적인 영업을 유도하여 가격 경쟁력을 높이고 입점 업체의 독립성을 최대한 제공하여 이-마켓플레이스 전체의 영업에 시너지 효과를 발생시킬 수 있도록 하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2019.06a
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• pp.73-75
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• 2019

인터레이스 영상은 지난 수 십 년간 방송 및 비디오 레코딩 등에 광범위하게 사용되고 있으며 디인터레이스의 성능을 향상 시키기 위한 많은 연구가 이루어졌다. 이를 위한 것으로써 본 논문에서는 컨볼루션 신경망을 이용한 비디오 디인터레이스 기법을 제안한다. 제안한 방법은 SKIP 연결을 사용하여 낮은 수준 특징 정보를 뒷 단의 레이어까지 전달함으로써 성능 향상을 달성하였다. 실험 결과는 FFMPEG 에서 제공하는 디인터레이스 기법에 비해 전 영상에 걸쳐 우수한 성능을 제공하며, 특히 복잡한 영상에서 기존 알고리즘 대비 큰 폭의 성능향상을 보인다.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.214-215
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• 2023

오늘날 운영체제나 응용프로그램에서 레이스 컨디션으로 인한 문제가 발생하여 공격에 이용하거나 레이스 컨디션을 기반으로 한 공격을 막기 위한 연구가 진행되고 있다. 그러나 레이스 컨디션이 발생할 때 스레드가 자원에 접근하는 매커니즘을 응용한 보호기법과 관련된 연구는 미흡하다. 이에 본 논문에서는 레이스 컨디션이 발생할 때 스레드가 무작위 순서로 자원에 접근하는 점을 이용해 새로운 난수 생성 방식을 제안한다. 또한 이를 난수 생성 알고리즘을 사용하는 랜덤 모듈과 비교하여 더 안정적인 난수 생성 모듈을 개발할 수 있는 가능성에 대해 알아봤다.