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      • KCI등재

        항목기반 패턴을 사용한 학습 방법 추천 시스템의 설계 및 평가

        김성기(Seong-Kee Kim),김영학(Young-Hag Kim) 한국콘텐츠학회 2009 한국콘텐츠학회논문지 Vol.9 No.5

        본 논문에서는 항목기반 방법을 이용하여 교육자들이 학습자들에게 적용하고 있는 학습 패턴을 위한 새로운 학습 추천 시스템을 제안한다. 본 논문에서 제안된 방법은 먼저 인터넷 콘텐츠 사이트에서 학습자들이 수행하는 학습 정보를 기반으로 개인별 학습 방법을 수집한다. 다음에 이러한 정보를 기본으로 하여 학습 요소별로 구분하여 학습자들에게 가장 적합하다고 판단되는 학습 방법을 추천한다. 제안된 시스템의 평가를 위해 한 중학교 학생들을 실험에 참여시켰으며 학습자의 성적에 따라 3개의 그룹으로 구분하였다. 학업 성취도 향상을 위한 가장 효과적인 방법을 추천하기 위해 각 그룹에 적용되는 학습 요소들에 속성간, 속성내 가중치를 부여하였다. 실험 결과 제안된 방법에서 학습자들의 성취도가 이전 성적에 비해 상당한 수준으로 향상됨을 보였다. This paper proposes a new learning recommendation system for learning patterns that educators are applying to learners using item-based method. The proposed method in this paper first collects personal learning methods based on learning information that learners are performing through the internet contents site. Then this system recommends a learning method which is estimated most properly to learners after classifying learning elements based on these information. The students of a middle school took part in the experiment in order to evaluate the proposed system, and the students were divided into three groups according to their grades. We gave inter-attribute and intra-attribute weights to learning elements applying to each group for recommending the most efficient method to improve learning achievement. The experiment showed that the learning achievement of learners in the proposed method is improved considerably compared to the previous grades.

      • 콩 점무늬병 판별품종 선발 시험

        김성기 ( Sung-kee Kim ),이영수 ( Young-soo Lee ),이종형 ( Jung-hyeong Lee ),김진원 ( Jin-won Kim ),김지성 ( Ji-seong Kim ),정우석 ( Woo-suk Jung ) 한국콩연구회 2017 韓國콩硏究會誌 Vol.33 No.1

        Frogeye leaf spot(FLS) caused by phytopathogenic fungus Cercospora sojina Hara is and important foliar disease in many soybean[Glycine max (L.) Merr.] production areas of the world including the region of northern part of Gyeonggi-do. It can appear to be genetically variable and cause severe yield losses, but have been not any study about differential variety or genetic resistance in Korea. This study was conducted to develop the differential variety of soybean to aid in race identification of the FLS. The results are summarized as follows. We had collected 141 infected soybean leaves from the 52 major soybean cultivation areas including the region of northern part of Gyeonggi-do, and six FLS races(Cs-02, Cs-10, Cs-14, Cs-l6, Cs-19, Cs-20) were identified after due consideration of the morphological feature and the C. sojina-soybean interaction(pathogenicity). The six FLS races could be divided using eight differential cultivars(`Taegwang`, `Dachae`, `Daemang`, `Anpyeong`, `Chungja No.3`, `Geomgang`, `Jangwon`, `Bogwang`) had been bred in Korea. The genetic similarity showed an high positive correlation between the pathogenicity of these differential cultivars. and this will provide soybean breeders an opportunity to use these gene-specific primers for the selection of FLS resistant variety.

      • 콩 점무늬병 발생생태 및 생태형 조사

        김성기 ( Sung Kee Kim ),이영수 ( Young Soo Lee ),최병열 ( Byoung Rourl Choi ),김지성 ( Ji Seong Kim ),김진원 ( Jin Won Kim ) 한국콩연구회 2015 韓國콩硏究會誌 Vol.32 No.1

        Frogeye leaf spot (FLS) is an important foliar disease in many soybean (Glycine max) production areas of the world including the region of northern part of Gyeonggi-do. This study was conducted to investigate the occurrence patterns and the distribution of FLS races. The results are summarized as follows. The pathogen of FLS is Cercospora sojina Hara. The conidia are 2~8 sepates, and are 6.0~7.7㎛ ×38.4~91.2㎛. The optimal temperature for the growth of C. sojina was at 25℃ on PDA medium, and for the conidia formation was at 28℃ on V8 medium. FLS occurs from the middle of July to the middle of September in the northern part of Gyeonggi-do, and the amount of occurrence increase at the middle of August. It occurred severely when the temperature and humidity were continued at 24~26℃, 83~87% from the late of July to the early of August. The organ of soybean in the order of frequency in occurrence was leaves (75% >), petioles (20% >), and pods (5%). The occurrence of FLS might be related with soil condition. Probably FLS occur more frequently in the continuous soybean culture plot than discontinuous soybean cultured plot. And cropping patterns also affected on the occurrence of FLS that the mobility rate were double cropping (with Cruciferae) 22.6% > double cropping(with Graminae) 14.4% > pady-upland rotation 4.4%. The average mobility rate of FLS in 2006 to 2007 were 68% > 2006 64% > 2005 43% in the region of northern part of Gyeonggi-do, and were Gangwon-do 78%, Gyeonggi-do 62%, Chungcheongbuk-do 54%, Gyeongsangbuk-do 43%, Jeonlabuk-do 36%, Chungcheongnam-do 33%, respectively. We isolated six C. sojina races from the infected plant collected from 52 areas. The selection of race were based on the cultivation area and variety which we had collected pathogen from 2005 to 2007, especially based on the pathogenicity against 63 soybean varieties in Korea.

      • KCI등재

        단보 : 집수역 규모 기상위험 경보체계 구축

        박주현 ( Ju Hyun Park ),김성기 ( Seong Kee Kim ),신용순 ( Yong Soon Shin ),안문일 ( Mun Il Ahn ),한용규 ( Yong Kyu Han ) 한국농림기상학회 2014 한국농림기상학회지 Vol.16 No.4

        This technical note describes about the base stages of technology implementation for establishing “Early Warning System for Weather Hazard Management in Climate-smart Agriculture” to national onsite service. First of all, a special weather report service at catchment was represented sequential risk of 810 units of catchment by spatial statistical methods to existing 150 counties units special weather report released in KMA. The second, chronic hazard alarm service based on daily data of 76 Synoptic stations was monitor about 810 Catchment of mid-long term lapse weather and represented as a relative risk index chronic hazard risk of this time in preparation for the climatological normal conditions in the same period. Finally, we establish the foundation for delivering individually calculated field specific in hazard risk about volunteer farmer of early warning service demonstration area in seomjin downstream watershed. These three types of information were built a near real-time map service on the VWORLD background map of Ministry of Land as superposed layers nationwide catchment and demonstration areas within the farm unit weather hazard.

      • KCI등재

        Shoulder Surfing 공격을 고려한 패스워드 입력 시스템 구현 및 통계적 검증

        임수민(Soo Min Lim),김형중(Hyoung Joong Kim),김성기(Seong Kee Kim) 대한전자공학회 2012 전자공학회논문지 Vol.49 No.9

        사용자 인증을 위해 패스워드를 사용하는 것은 구성이 간단하고 인증 과정에서 걸리는 시간이 비교적 짧기 때문에 사용성이 높은 암호시스템이다. PC, 스마트 폰, 태블릿 PC등 다양한 입력 디바이스에서의 활용성이 높은 반면 패스워드를 입력하는 과정에서 공격자에게 패스워드가 노출될 물리적인 위험이 존재하는데 이것을 일컬어 Shoulder Surfing 공격이라 한다. 패스워드의 형태는 과거보다 조금 더 복잡해진 문자형 패스워드를 비롯해 최근에는 이미지를 이용하거나 시나리오를 활용하는 등 사용자의 의도가 반영된 패스워드가 개발되고 있다. 다양한 패스워드가 개발되면서 사용자 중심으로의 사용가능성과 보편성에 대한 평가 기준에 대한 연구가 부진 하다. 본 논문 에서는 간단한 이미지를 이용한 패스워드 시스템과 자판 변환이 가미된 입력 시스템을 구현한 후 해당 입력 시스템의 사용가능성을 통계적인 방법을 이용하여 검증해보고자 하였다. Using password on system is easy to build and shorten the access time to authorize user, which is high in use for vary system that requires users" authorization. Many input device are able to perform the password system easily, such as PC, smart-phone, tablet PC, etc. Beside the high usability of password, physical attack occurs when user put their password on the device, known as Shoulder Surfing attack. It used to be formed in numbers, characters or mix of different kinds, but new kind of password arose. Exploiting image or making scenarios are those kinds which are able to reflect users" intentions. Not many estimation exists for new password, so there"s need to be standard for those new password for highlighting usability and accessability. In this paper, we propose password system with simple image and switching key-board to test statistical method to estimate usability on the password.

      • 오토메이션을 이용한 □글 이동 사무 환경의 구현

        정문영 ( Moonyoung Chung ),구경이 ( Kyong-i Ku ),김성기 ( Seong-kee Kim ),김원영 ( Won-young Kim ),최완 ( Wan Choi ) 한국정보처리학회 2006 한국정보처리학회 학술대회논문집 Vol.13 No.2

        유비쿼터스 환경에서 업무 중에 잦은 이동을 하는 사용자들은 이동 중에도 자신의 작업 환경을 연속으로 보장받아 업무의 연속성을 갖길 원한다. 본 논문에서는 여러 사무 응용 애플리케이션 중 □글 애플리케이션을 이용하는 사용자에게 이동 사무 환경을 보장하기 위해 □글의 오토메이션 기능을 이용해 이동 사무 환경을 구현하였다. 구현된 환경에서는 작업 중인 □글의 사무 환경(작업 정보)을 자동으로 저장하고, 사용자가 이동한 다른 컴퓨터로 저장된 사무 환경을 이동시켜 복원한다. 따라서 사용자는 이동 후에도 업무를 연속적으로 수행하거나, □글 애플리케이션을 사용하는 자신의 사무 환경을 다른 사용자에게 전달해 작업 진행을 공유함으로써 협업할 수 있다.

      • 데 스틸 건축의 형태적 특성에 관한 연구

        김성기 慶山大學校 1998 論文集 Vol.16 No.1

        The discovery of space and many attempts on space are great achievements of modern architecture. De Stijl architecture provided the base on making the theory of spatial concept in modern architecture through efforts for creating new spatial conception the formation period of modern architecture. The De Stijl architecture, which evolved in various fielas of arts based on Mondrian's Neoplasticism in the confusing stream of the artistic trendat the begining of the 20th Century has influenced all the plastic arts of the 20th Century along with modern architecture by completing geometrical abstract art. Through this thesis, by correctly analyzing and interpreting the De Stijl architecture, I have attempted to make a study of the De Stijl architecture for its significance and importance from the process of development to the present-day architecture.

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