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Du-Ku Lee,Jai-Sung Shim,Hyeong-Kwon Shim,Yong-Hoon Lee,Wang-Hyu Lee 한국자원식물학회 1999 Plant Resources Vol.2 No.2
Sixteen isolates showing relatively strong antagonicity against the ginger rhizome rot pathogen, Pythium zingiberum, were selected among the 155 isolates from ginger rhizome surfaces and rhizospheres of ginger cultivation fields in Wanju, Chonbuk. The isolate, ‘HB 26-5 showing the strongest antagonicity was finally selected by testing duration of inhibition effect and pathogenicity to ginger. The isolated antagonistic microorganism, HB 26-5 , was rod shape, gram positive and formed endospore. The isolate produced acids utilizing glucose, arabinose, xylose and mannitol, and acetoin at VP test, and grew anaerobically. Temperature range for growth was from 10 to 400. Reaction to catalase and gelatin, hydrolysis were positive, and casein hydrolysis and indol production were negative. Based on the mycological characters and the fatty acid composition, it was identified as Bacillus polymyxa. The pathogenicity test of isolated Bacillus polymyxa HB 26-5 on 22 crop cultivars resulted that only the lettuce was influenced in germination, and the others were not affected.
Roro 터미널에서의 적부계획 분석을 위한 CPM 접근법
구두산(Du-san Ku),조찬혁(Chan-hyouk Cho) 한국국제상학회 2009 國際商學 Vol.24 No.3
본 연구의 목적과 주안점은 Roro 터미널 운영에 있어서 최적화 전략의 구축이다. Roro 터미널에서의 적부계획 수립후의 운영전략과 동 계획의 실시간 평가체계를 수립하는데 초점을 두고 있다. 연구의 진행을 위해 일정한 가정 및 제약조건을 부여 했으며, 휴리스틱 알고리즘을 적용할 수 있는 시뮬레이션 모델을 개발하였다. 우선 시뮬레이션 결과를 통해 각 화물그룹의 예상 작업시간 추정치를 산정한 다음에 이를 CPM 네트워크의 인풋자료로 활용하였다. 예측치와 실제 진행상황간에 유의한 오차가 발생하거나 제약조간에 변화가 생길 경우 시뮬레이션 모델상 critical path를 수시로 재산정하였다. 결론에서 화물 적재과정에서의 실시간 조정의 중요성을 재삼 강조했다.
재배양식에 따른 벼 줄무늬잎마름병 전염원인 애멸구의 밀도
이두구(Lee, Du-Ku),심형권(Shim, Hyeong-Kwon),박종철(Park, Jong-Chul),최만영(Choi, Man-Young),강미형(Kang, Mi-Hyung),김재덕(Kim, Jae-Duk),박진우(Park, Jin-Woo),노태환(Noh, Tae-Hwan) 한국자원식물학회 2006 한국자원식물학회지 Vol.19 No.4
In double cropping fields, there has been a risk of increase rice stripe viral disease outbreaking as the vector, small brown planthopper that overwinter in barley fields increases. Especially rice cultivation in Honam region has two types of cropping system such as rice only cropping in a season and double cropping both of rice and barley. In double cropping system, harvesting of barley could induce migration of the vector from barley to rice field. We found that the vector s density was different in rice fields by distance from barley field. The vector s density in rice field was highest 63 numbers within one meter from the neighbor barley field, and the numbers reduced greatly as the distance from barley field increases. The disease incidence according to rice cultivation methods was different, Donjin 1 was appeared to be a susceptible variety showing 2.4% and 2.5% of disease incidence in direct and transplanting cultivation, respectively. The small brown planthopper in a nearby rice field reach peak 3 days after the barley field was harvested. 보리 재배면적 증가로 인하여 월동한 애멸구 밀도증가가 벼 줄무늬잎마름병의 대면적 발생 위험이 상존하고 있다. 특히 호남지역은 보리재배 논과 1모작 이앙 또는 직파재배 논이 혼재하고 있어 보리 수확과 동시에 보독충인 애멸구는 벼가 자라고 있는 논으로 대규모 이동하여 병 발생을 조장하고 있다. 재배양식에 따른 줄무늬잎마름병 발생양상은 1모작 이앙과 담수직파 재배에서 병발생이 각각 2.5, 2.4%로 이모작 이앙 1.3%보다 높았다. 보리재배 논과의 2m 이내의 거리에서 보리 수확 3일전 애멸구 밀도는 5마리에서 수확 3일후 63마리로 급격하게 증가하였다. 또한 보리재배 논과 거리가 멀어짐에 따라서 애멸구 밀도는 크게 감소하였다.
Cervical Cancer Mortality Trends in China, 1991-2013, and Predictions for the Future
Du, Pei-Ling,Wu, Ku-Sheng,Fang, Jia-Ying,Zeng, Yang,Xu, Zhen-Xi,Tang, Wen-Rui,Xu, Xiao-Ling,Lin, Kun Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.15
Background: To analyze cervical cancer mortality trends in China from 1991-2013 and forecast the mortality distribution in future five years (2014-2018), and provide clues for prevention and treatment. Materials and Methods: Mortality data for cervical cancer in China from 1991 to 2013 were used to describe the epidemiological characteristics and distribution, including the trend of the standardized mortality rate, urban-rural differences, and age variation. Trend-surface analysis was used to analyze the geographical distribution of mortality. Curve estimation, time series, gray modeling, and joinpoint regression were performed to predict and forecast mortality trends. Results: In recent years, the mortality rate of cervical cancer has increased, and there is also a steady increase in the incidence from 2003 to 2013 in China. Mortality rates in rural areas are higher than in urban areas. The mortality dramatically increases in the 40+ yr age group, reaching a peak in the >85 yr age group. In addition, geographical analysis showed that the cervical cancer mortality increased from the southwest to west-central and from the southeast to northeast of the country. Conclusions: The incidence rate and the mortality rate are increasing from 1991 to 2013, and the predictions show this will continue in the future. Thus, implementation of prevention and management programs for cervical cancer are necessary in China, especially for rural areas, young women in urban areas, and high risk regions (the west-central).
당뇨병 환자에서 Power Spectrum Analysis 를 이용한 자율신경계 이상의 검정
이두하(Du Ha Lee),황형기(Hyoung Ki Hwang),이형우(Hyoung Woo Lee),김영조(Young Jo Kim),심봉섭(Bong Sup Shim),이현우(Hyun Woo Lee),신동구(Dong Ku Shin),이상학(Sang Hak Lee),이준하(Jun Ha Lee) 대한내과학회 1991 대한내과학회지 Vol.41 No.5
N/A In order to assess the autonomic nervous system activity in normal subjects and in diabetic patients affected by different degrees of diabetic autonomic neuropathy, we applied autoregressive power spectral analysis to 35 diabetic patients and 15 normal controls. This analysis was then compared to conventional methods by CAN score tests. Each subject was placed on a bed and connected to electro-cardiographic electrodes. After 15-minute rest in a sitting position, the electrocardiogram (ECG) recorded 512 heartbeats in a supine position. Thereafter, the same measure was taken in a standing position. During the test, the subjects quietly breathed in synchronosity with a 15/min (0.25 Hz) metronome signal to obtain stationary respiratory activity without frequency change or phase drift. R-wave detection by fast peak detection algorithm and spectrum computation by Fast Fourier transform enabled the study of the power spectrum of heart rate fluctuations. The power of fluctuations at different frequencies was the result of sympathetic and vagal input into the sinoatrial node. The autoregressive power spectral density of RR interval variability contained 2 major components: a high frequency (0.25 Hz), which is a quantitative marker of cardiac vagal activity, and a low frequency (<0.15 Hz), which is a quantitative marker of sympathetic activity with vagal modulation. A marked reduction in HF spectral density was found in diabetic patients relative to the normal controls (p<0.001). When neural activity was provoked through standing, less decreased HF spectral density and less increased LF spectral density were noted in diabetic patients relative to the normal controls (p<0.01). When diabetic autonomic neuropathy was advanced, HF and LF spectral density changes were lost. This method is simple, repeatible, objective, and quantitative. It may facilitate the screening of diabetic patients for autonomic neuropathy and enable convenient quantitative fallow-up.
정밀 좌표변환 알고리즘을 이용한 인공위성 항로추적시스템에 관한 연구
장용구(Yong-Ku Chang),문두열(Du-Yeoul Mun),최성재(Sung-Jae Choi),이용희(Young-Hee Lee) 한국항해항만학회 2003 한국항해항만학회지 Vol.27 No.1
현재 육상에서의 GPS는 자동차 항법체계(Car Navigation System)와 개인 휴대용 단말기를 이용한 위치정보체계 등이 활발히 활용되고 계속 연구되고 있는 추세에 있지만 해양에서는 그렇지 못한 실성으로 원래, GPS는 선박의 항해용 목적으로 개발된 것이지만, 해상에서 선박의 운항에 정확도는 크게 어려움을 주지 않는다는 이유로 선박의 항로확인을 위한 근사적인 위치의 표현만을 수행해왔다. 최근 항만이 복잡해지고 선박의 증가로 해양에서도 선박의 정밀한 유도가 필요하게 되었다. 본 연구에서는 GPS에서 사용하고 있는 타원체인 WGS84 타원체의 지리좌표를 우리나라에서 사용하고 있는 타원체인 BESSEL 타원체의 지리좌표로 변환하는 요소인 3-parameter에 의한 타원체변환알고리즘 및 육도와 해도에서 사용하고 있는 평면직교좌표계인 TM투영과 UTM투영의 알고리즘제작 하였다. 또한, 현재 항법용 GPS 센서가 가지고 있는 정확도를 검증하기 위해 GPS의 정적측량, 동적측량에 의한 오차량을 비교검토하였으며, 선박의 항로추적을 위해서 선박에서 수신된 위치정보의 편차량을 분석하였다. 이렇게 검토된 자료를 기본으로 하여 실시간 선박항로를 추적할 수 있는 저가의 항로추적시스템 개발을 본 연구의 최종목표로 연구를 수행하였다. The most recent GPS is working on CNS(Car Navigation System) and personal terminal, but the ocean has not been. First studied GPS is sailing to ship but We have been connivance that. The ship is not need detail navigation. Lately, Harbor facilities and transportation service in harbors are complication. We have need accurate ship navigation system. In this paper, author developed algorithms of ellipsoid conversion between WGS84 and BESSEL and developed algorithms of map projection between ellipsoid coordinate system and plane cartesian coordinate system. Author used 3-parameter in coverting ellipsoids and used TM and UTM projection in converting between ellipsoid and plane cartesian coordinate. And author analyzed errors through static surveying and dynamic surveying of GPS for proving accuracy of GPS sensor. Furthermore author analyzed deflection error of received position. Finally author developed real time ship navigation system using cheap GPS sensor.