도로의 주행안전성 확보를 위한 팽창메탈형 방풍벽

정운용(Jeong Un Yong),권순덕(Kwon Soon Duck),정봉조(Chung Bong Jo),박태규(Park Tae Kyu) 한국강구조학회 2003 韓國鋼構造學會誌 Vol.15 No.1

고속도로 표지체계 개선 방안에 대한 고찰

정봉조,이현석,서임기,허정철,Chung, Bong-Jo,Lee, Hyun-Seok,Seo, Im-Ki,Her, Jung-Chul 대한교통학회 2010 교통 기술과 정책 Vol.7 No.4

Demand/Effort모형의 수준결정을 위한 수리적 방법 연구

정봉조,장명순,김정룡,박재완,Chung, Bong-Jo,Jang, Myung-Soon,Kim, Jung-Young,Park, Jae-Wan 대한인간공학회 2005 大韓人間工學會誌 Vol.24 No.1

81.1% of traffic accidents is attributed to the drivers. In this regard, D/E model is a practical and effective method in terms of the cost and time in evaluating the road hazardousness. To examine the validity of the threshold values by the levels of demand We selected 10 subjects and collected their physiological signals while they were driving on Honam Highway (Jeonju ${\leftrighttarro}$ Hoideog section). Based on the collected data, the hazardous road condition was evaluated using the new threshold values of the effort level determined by cluster analysis. In applying the D/E model, a decision method based on the demand level was suggested, using a traffic accident prediction model. Additionally, the limit value of the effort level was determined using the drivers' physiological signal data collected at the highway. A comparison analysis of the two D/E models revealed no significant difference: The existing method and the clustering method determined 9 and 7 hazardous road zones, respectively, while actual traffic accidents were reported in 6 and 4 zones, respectively among the predicted road hazardous zones. However, the latter method suggested a more scientific and rational basis in determining the limit value of the Effort level. In conclusion, although D/E model has a great merit as a pioneering method to reflect human factors in evaluating the road hazardousness, it is believed that this method could be improved by a more dynamic method that considers the traffic conditions and the individual physiological signal of the drivers simultaneously in determining a better limit.

Fusarium(Calonectria) nivale에 의한 맥류의 신병해

성재모,정봉조,Sung J. M.,Chung B. J.,Snyder W. C. 한국응용곤충학회 1977 한국식물보호학회지 Vol.16 No.4

Early in the growing season of 1976, rain and cool weather favored the blighting of leaves of young plants of barley by Fusarium nivale. The fungus was recovered in culture from infected foliage, and the perithecia of Calonectria nivalis were demonstrated to be present as well as the Fusarium state. On 22 April 1976, in Suweon, plants pulled at random revealed stem lesions from which F. nivale was cultured. On S May 1976 near Kwangju. Perithecia were found embedded within leaf sheaths and blades of mature wheat and barley plants. It was evident in the 1976, 1977 season that Fusarium(Calonectria) nivale was common but unrecognized as an early season pathogen of barley in Korea. The probable source of primary inoculum was the infected refuse from the previous season's barlry and wheat crops. Stem lesions caused by this fungus were considered to he detrimental to the maximum yield of barley or wheat.

Studies on Identification and Classification of Soybean Virus Diseases in Korea I. Preliminary Studies on a Soybean Virus Disease in Korea

조의규,정봉조,Cho Eui Kyoo,Chung Bong Jo Korean Society of Applied Entomology 1976 한국식물보호학회지 Vol.15 No.2

광교, 동북태, 강림, 육우3호, 은대두등과 같은 대리장려품종이 바이러스에 의하여 심하게 이병되었다. 이 병은 주로 모자익병의 발생이 많은 강원, 경기지방에서 발병이 심하였으나 모자익병이 심하지 않은 전남 등 남부지방에서도 발병되고 있다. 병징으로 보아 tobacco ringspot virus에 의한 대두의 피해와 유사한 것으로 보였으나 지표식물검정과 혈청검정에 의하여 조사한 결과 모두 부정적이었으며 대두품종에 따른 이병정도의 상이, 품종과 접종원에 의한 병징의 변이가 많았다. 이병주에서 분리되는 병징형은 Mottling과 necrosis였으며 지금까지의 연구결과 이 대두병해는 모자익바이러스(SMV)의 계통 내지는 tobacco ringspot virus 이외의 두류바이러스의 복각감염에 의한 것으로 생각할 수 있으나 SMV의 계통에 의한 피해일 가능성이 더욱 유력시되고 있다. Leading soybean cultivars such as Kwanggyo, Yugu No.3, Dongbugtae, Gangrim, and Eundaedu were heavily diseased by a virus in Korea. The disease was most severe in the northern provinces where soybean mosaic virus also occurrs, but the disease has also been observed in other provinces where soybean diseases are less prevalent. The disease symptoms were similar to bud blight caused by tobacco ringspot virus; but this was not confirmed in inoculation tests on indicator plants and serological experiments. There were some differences in varietal susceptibility to the disease, with symptom variation depending on the soybean cultivar and source of inoculm. Disease symptoms on infected soybean plants were mottling and necrosis. The present results, therefore, indicate some strains of SMV or a mixture of legume viruses may or may not be responsible for the disease.

시금치 바이러스병에 관한 연구 II. 시금치에 발생하는 Broad Bean Wilt Virus (BBWV)의 분류동정

이순형,이기운,정봉조,Lee S. H.,Lee K. W.,Chung B. J. 한국응용곤충학회 1979 한국식물보호학회지 Vol.18 No.1

짙은 연색의 모자익병징을 나타내는 이병 시금치를 채집하여 Broad bean wilt virus(BBWV)를 분리동정 하였다. 분리된 Broad bean wilt virus (BBWV)를 지표식물에 즙액접종한 결과, 명아주(Chenopodium amaranticolor), 명아주(Chenopodium quinoa) ,잠두(Vicia faba)에서는 접종엽에 국부병반이 나타났고 접종상엽에서는 모자익(전신감염)병징이 나타났으며 꽈리(Physalis floridana), 시금치, 담배 (W.B), 담배 (Nicotiana glutinosa)에는 모자익 병징이 나타났다. 이병시금치로부터 분리한 병원바이러스와 BBWV의 항혈청을 한천내확산법(Agar gel-diffusion test)으로 반응시킨 결과 양성 반응이 나타났다. 이병엽을 Dip법으로 시료를 제작하여 전자현미경에서 검경한 결과 구형의 입자가 관찰되었으며 직경은 25nm이었다. 시금치 재배포장에서 BBWV의 발생분포는 수원, 안양, 대구 진주 등 거의 전국적으로 발생하였다. Spinaches showing dark green mosaic symptoms were used for identification of broad bean wilt virus. In host reaction test, that virus caused local lesions on the inoculated leaves and mosaic symptoms on upper leaves of Chenopodium amaranticolor, Chenopodium quinoa and Vicia faba, and developed mosaic symptoms on Physalis floridana, Spinacia oleracea, Nicotiana tabacum, (White burley, Bright yellow) Nicotiana glutinusa. In agar gel-diffusion test, the virus showed positive reaction with broad bean wilt virus antiserum. Spherical virus particles with size of 25nm in diameter were observed in electron microscope.

한국에 있어서의 'Kresek'에 관한 연구 I 'Kresek' 발생지의 병원균 균형 및 병징 재현에 관한 시험

최용철,조응행,정봉조,조용섭,유연현,Choi Yong Chull,Cho Eng Haeng,Chung Bong Jo,Cho Yong Sup,Yoo Yeon Hean 한국응용곤충학회 1977 한국식물보호학회지 Vol.16 No.1

우리나라에서 처음 발생되었던 Kresek에 과한 발생의 균형 및 재현에 관한 시험결과는 다음과 같았다. 흰빛잎마름병균에 의한 Kresek 현상은 주로 남부방인 전라남도 화순, 무안, 강진, 영암, 곡성, 광산, 경상남도 진양군에서 볼 수 있었다. Kresek 발생지의 병원균의 균형은 I, II, IV, V군에 의한 발생을 나타냈다. 3. Kresek이 가장 심하였던 화순군에서는 21균주중 17균주는 IV군, 2균주는 II군, 2균주는 V군이었으며 광산군의 5균주는 IV군dp 속하는 균주였다. 4. 화순군에서는 II, IV, V군이 혼재하고 있음을 볼 수 있었다. 5. Kresek 재현에 관한 시험에서는 접종 5일만에 발병을 볼 수 있었으며 뿌리 절단법에서 발병율이 현저히 높았고, 분무접종, 침접종에서도 발병을 볼 수 있었다. 6. 병원균농도가 높을수록 발병이 많았다. The 'Kresek' disease in Korea caused by Xanthomonas oryzae was first found from eight counties in Jeon-nam and Kyungnam province in 1976. The study has been carried mainly on the grouping of pathogens and reproduction of the symptoms on Milyang #23, the variety had shown severe damages at the fields, by using the isolates from Hwa-sun and Kwang-san counties where the first epidemics took place. 1. The 'Kresek' disease was found mainly on Milyang #23, a new variety, at Hwa-sun, Mu-an, Kang-jin. Yung-am, Gog-sung counties in Jeon-nam province and Jin-yang county in Kyung-nam province. 2. The groups of 'Kresek' causing pathogens were the same of those producing bacterial leaf blight symptoms such as group I , II, IN and V of Xanthomonas oryzae. 3. Seventeen out of 21 isolates from Hwa-sun county where the first and severe damage found belonged to group IV, 2 to group II and 2 to group V All of 5 isolates from Kwang-san county belonged to the group IN. 4. The 'Kresek' type symptom could reproduced within 5 days after inoculation to seedlings by using root tut, spray and needle inoculation methods. j. The most of effective method for the inoculation was root cut, and then were spray and needle method. respectively. The higher concentration of inoculum produced the higher disease incidence.

Purification and Serology of Potato Virus S

이순형,이기운,정봉조,Lee Soon Hyung,Lee Key Woon,Chung Bong Jo Korean Society of Applied Entomology 1977 한국식물보호학회지 Vol.16 No.3

감자바이러스 S(PVS)의 진단, 동정 및 씨감자의 검정에 이용할 항혈청을 만들기 위하여 이병주로부터 PVS를 순수분리 순화하여 항혈청을 제조하였다. PVS는 지표식물파 전자 현미경으로 순수 분리하여 Nicotiana debneyii에서 증식하여 순화하였다. 순화된 PVS의 순화도는 1.18mg/ml이었으며 이것을 1.5ml씩 7일 간격으로 5회 .토끼에 주사하였으며 마지막 주사후 10일에 채혈하여 항혈청을 분리하였다. 제조된 PVS항혈청의 역가는 미량침강법에 의하여 1/2048로 나타났다. he study was conducted to produce an antiserum of potato virus S for identification and screening of seed-potatoes. Potato virus S was isolated from infected plants and identified by means of indicator plants and electro microscopy. Isolated potato virus S was multiplied in Nicotiana deebneyii and the virus was purified by a modified method that was developed through this study. The purity of potato virus S was 1.18mg/ml. Purified potato virus S was injected into rabbit intravenously once a week for 5 weeks. Antiserum was collected 10 days after the last injection. The produced antiserum was determined to have a titer of, 1/2048 by means of microprecipitin tests.

교통약자(고령운전자)의 운전특성 및 고속도로 교통안전 교육에 관한 연구

이은경(YI, Eun Kyeong),정봉조(CHUNG, Bong Jo),박재범(PARK, JaeBeom),윤일수(YUN, Ilsoo),김상구(KIM, Sang Gu) 대한교통학회 2014 대한교통학회 학술대회지 Vol.71 No.-

콘크리트 교각의 친환경적 해체공법 개발

이창수 ( Lee Chane-soo ),정봉조 ( Chung Bone-jo ),최원일 ( Choi One-il ) 한국구조물진단유지관리공학회 2004 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.8 No.1

Citizen demand the application of safe, economic, and environment-friendly demolition methods as society has been developed. This study investigates problems of existing demolition methods, develops new demolition method which can be minimized cooling water and sludge for the main cause of the environmental pollution, and certifies validity of new method by finite element methods. For many cases it chooses parameters as a number, depth and size of boring, and according to self weight, calculates appropriate those of boring by comparison and analysis.