식물병원균의 새로운 분류

유승헌 한국식물병리학회 1998 식물병연구 Vol.4 No.1

한국에서 카네이션에 발생하는 Alternaria dianthi

유승헌,강희완,이향범,김홍기 ( Seung Hun Yu,Hi Wan Kang,Hyang Burm Lee,Hong Gi Kim ) 한국균학회 1989 韓國菌學會誌 Vol.17 No.4

매자기에 갈색무늬병(가칭)을 일으키는 Nimbya scirpiola

유승헌,윤해근,심형권 한국식물병리학회 1994 Plant Pathology Journal Vol.10 No.1

Alternatia panax에 의한 독할 검은무늬병(가칭)

유승헌,윤해근,김완규,이영희,이은종 한국식물병리학회 1992 Plant Pathology Journal Vol.8 No.1

施設栽培 딸기 圃場에서 Dicarboximide 系 藥劑抵抗性 잿빛곰팡이 炳菌의 發生

劉勝憲,朴貞憲 충남대학교 농업과학연구소 1992 농업과학연구 Vol.19 No.2

Isolates of Botrytis cinerea resistant to dicarboximide fungicides were collected from strawberry fields in greenhouses in spring and early summer of 1990. Five out of 9 isolates of B. cinera were resistant, which showed mycerial growth on PDA containing dicarboximide fungicides(procymidone and vinclozolin) with concentrations of 100, 400 and 1,600㎍g/ml. The minimal inhibitory concentration(MIC) values of the dicaboximide-resistant isolates was more than 6,400㎍/ml. while that of the sensitive isolates was less than 6.25㎍/ml. The germination ratio of conidia of the resistant isolates on PDA containing procymidone and vincolozolin was more than 95%, wile that of the sensitive was less than 15%. The procymidone-resistant isolates were also resistant to vinclozolin, showing cross-resistant between the fungicides, but cross-resistant was not observed between the dicarboximides and dichlofluanid. Resistance to benomyl was also found in all the dicarboximide resistant isolates. Occurrence frequency of dicarboximide-resistant isolates out of 223 isolates was about 40%. The resistant isolates were widely distributed throughout Korea.

사과점무늬낙엽병균(Alternaria mali)이 생성(生成)하는 기주특이적(寄主特異的) 독소(毒素)와 그의 생물활성(生物活性)

유승헌,심형권,박종성 한국식물병리학회 1987 한국식물보호학회지 Vol.26 No.3

논리 시뮬레이션에서 해싱을 이용한 효율적 이벤트 큐에 관한 연구

유승헌,정연모 慶熙大學校 1995 論文集 Vol.24 No.-

The performance of event-driven logic simulation frequently used for VLSI design verification depends on the data structures for event queues. This paper improves the existing Timing Wheel as a data structure for an event queue. In case of the use of B+ tree, an efficient node degree is also presented based on the experiment results. A new Timing Wheel index structure, which eliminates the insertion and deletion overhead of B+ tree, is proposed and analyzed.

過少月經 및 無月經의 診斷과 治療

劉承憲 대한의학협회 1961 대한의학협회지 Vol.4 No.5

韓國에서의 벼 잎집무늬마름명 發生變動에 關한 生態學的 硏究

劉勝憲 충남대학교 농업과학연구소 1977 農業技術硏究報告 Vol.4 No.2

In an attempt to obtain a basic information to develop an effective integrated system of controlling sheath blight of rice in Korea, the transition of this disease, the variation of cultural characters and pathogenicity of the pathogen, environmental conditions affecting the disease outbreak and varietal resistance have been investigated. 1. Rice sheath blight which has been minor disease in the past was widely spread, especially since 1971. This disease has promptly spread all over the country and infected 65.2% of total rice growing area in 1976. Various factors are considered to be related to such transition of this disease. Above all, increace of application of nitrogenous fertilizer, early season and earlier cultivation of rice, introduction of more susceptible "Tongil" varieties etc. must be important factors influencing the outbreak of this disease. 2. Great variations in cultural characteristics-such as mycelial growth rate, color of the medium, amount of the aerial mycelium, shape and color of the sclerotia-and in the pathogenicity of isolates of the pathogen, Thanatephorus cucumeris <Frank> Donk were observed. The optimum temperature for mycelial growth also varied with isolates, from 25℃ to 30℃. There were not necessarily any correlation between curtural characteristics and pathogenicity of isolates of Thanatephorus cucumeris. 3. Mycelial growth of isolates of Thanatephorus cucumeris on the PDA medium were correlated with the air temperatures of the region where the isolates were collected. The isolates from the regions with high temperature grew well on PDA medium at 35℃ than those from the region with low temperature, on the other hand, the isolates from the regions with the low temperature grew well on the same medium at 12℃ than those from the regions with high temperature. 4. Pectin polygalacturonase (PG) and cellulase (Cx) were most active on the 3rd day after inoculation on the leaves of rice plant with Thanatephorus cucumeris, whereas pectin methylestrase (PE) was most active on the 4th day after inoculation. Relationship between the activities of PE of isolates and the strength of pathogenicity of isolates was obtained, but PG and cellulase activities were not correlated with pathogenicity of isolates. 5. The tolerence of sclerotia from in-vitro culture to low temperature varied with their water content, the dried cultural sclerotia were more tolerent than wet ones, Dried cultural sclerotia maintained almost 100% germinability for 45 days at -20℃, whereas wet sclerotia lost viability at -5℃. The germination ratio of the sclerotia after overwintering changed from 18% to 70% according to the water content of the test paddy fields and the ratio was low in wet paddy condition. 6. To investigate the host range of this fungi in and near paddy field, 17 weeds were inoculated with fungi. The lesions of sheath blight disease was obserbed on Sagittaria trifolia L., Echinochloa crusgalli P.Beauv., Monochoria vaginalis Presl, Polygonum Hydropiper L., Eclipta prostrata L., Digitaria sanguinalis Scapoli. 7. When the level of nitrogen applied was doubled over standard level, total nitrogen content in rice sheath increased, and when silicate was applied, starch content in rice sheath decreased, inducing the rice plants more susceptible to sheath blight disease. Increased dressing of potash ferilizer reduced the incidence of sheat blight disease. 8. The percentage of infected stems in the early period increased more in the narrow hill plot than in the wide hill plot, but in the late period this tendency was inversed; the percentage of infected stems as well as severity in the wide hill plot increased more compared to the narrow hill plot, and the disease severity in the one plant per hill plot was also low. The number of stems in the wide hill plot was more than the number of stems in the narrow hill plot. This indicates that the microclimate, such as the relative humidity, in the narrow hill plot was more favorable for the development of this disease. 9. There was a high negative correlation between the disease severity of varieties to the sheath blight and the maturity of the varieties, that is, the early varieties were more susceptible than the late ones, and much-tillering varieties usually showed more infection than less tillering varieties. 10. No relationship was obtained between the percentage of infected stems in the early period and the severity after heading, whereas a distinct relationship was obtained between former and latter after Aug. 10.

디자인 중심 스마트 제조 프로세스 경험 요소 연구

유승헌 디자인융복합학회(구.한국인포디자인학회) 2020 디자인융복합연구 Vol.19 No.5

This study aims the establishment of design centric process of smart manufacturing throughout the analysis of current smart factories, real demand based production, and the creative process of designers. The preliminary one-directional design-manufacturing process were replaced with the concurrent multi-layered cyclic model of design. The literature studies and the interview sessions with 16 corporations were conducted to clarify the theoretical and practical analysis of current manufacturing-design process. The use of robot, smart data sensing S/W and the realtime market-user data for manufacturing were analyzed. The BCD(Business-Cognition-Design) model defines the planning-design-manufacturing-marketing as a unified structure of information, using smart tools that helps designers to concentrate on creative tasks in manufacturing process. The three layers of business-design-product in BCD frame defines necessary the devices and S/W that support realtime market data feedback, d prototyping and design patterns for smart design works. BCD framework also emphasizes that the role of design in smart manufacturing as a core factors for future industry. 본 연구는 스마트 제조 프로세스 분석과 실사용자와 생산자의 간극을지능적으로 연결하고, 사용자 관심도 기반의 수요 예측 데이터 조사를통해 제조기술에 혁신성을 부여하는 스마트 디자인 프로세스 제안을 목적으로 한다. 기존의 일방향 프로세스가 아닌 동시 진행 사이클 모델을통한 디자인 친화적 스마트 제조 프로세스를 탐구하였다. 문헌연구와16개 기업 인터뷰를 통해 중소기업의 제조 프로세스를 분석하였고, 인간과 협업이 가능한 로봇-정보기술을 활용을 통한 생산 기술의 감성형지식화 및 사용자 데이터의 디자인 활용 가능성을 검토하였다. 분석결과 제안된 BCD (Business-Cognition-Design) 프레임웍은 디자이너의 창의성이 제품 프로세스의 전 수명주기 단계에 적용될 수 있는구조체를 정의하였다. 비즈니스-사용자-제품의 3개 수준 레이어에서각 5단계별 실시간 데이터 센싱과 전수명주기 제조기술의 보급을 통해중소기업과 1인 작업자의 제조 효율을 극대화한다. 또 실시간 프로토타이핑과 디지털 템플릿으로 디자이너의 소모형 구현 테스트의 반복 과정을 최소화하고, 창의적인 제품 및 UX 개발에 더더욱 역량 집중을 가능하도록 하는 순환형 스프린트 디자인 프로세스를 가능하게 하였다.