http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
병해충 방제 - 소나무류 잎의 병해: 잎떨림병, 잎녹병
이승규,Lee, Seung-Gyu 한국조경수협회 2012 造景樹 Vol.127 No.-
지난 호의 소나무류 가지마름성 병해에 이어 이번 호에서는 소나무류 잎마름성 병해를 소개한다. 소나무의 잎에서 나타나는 잎마름성 병해는 증상과 원인이 다양하여 정확한 원인을 밝히기가 매우 어렵다. 그 이유는 수목의 이상 증상은 기본적으로 1) 비기생성(생리적, 비점염성) 원인, 2) 기생성(생물적, 전염성) 원인에 의하여 발생하는데, 진단 결과에 따라 수목의 재배환경을 점검하고 개선하여야 할 문제인가(비기생성 원인), 또는 약제를 사용하여야 할 것인가(기생성 원인)를 먼저 결정하여야 한다. 그 이유는 피해 원인이 물, 온도, 제초제 등 비기생성 원인에 의한 것이라면 재배환경의 개선 또는 원인 제거만으로도 충분히 나무를 회복시킬 수 있고, 병원균에 의한 것이라면 정확한 병명 진단 후에 적용 약제를 적절한 시기에 살포하여 불필요한 농약의 사용을 줄이면서 효과적으로 방제할 수 있기 때문이다. 수목의 잎에서 흔히 나타나는 이상 증상은 다음과 같이 비기생성 원인과 기생성 원인을 포함하여 크게 세 가지로 구별할 수 있으며, 기본적인 진단 요령과 원인은 다음과 같다.
An adaptive importance sampling method with a Kriging metamodel to calculate failure probability
이승규,김재훈 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.12
A Markov chain simulation was performed to extract points in a failure region. A Kriging metamodel was constructed to approximate a limit state based on the points extracted by the Markov chain simulation. A kernel sampling density was constructed to approximate the optimal importance sampling density. The points extracted in the failure region by the Markov chain simulation were assumed as a mean of each kernel. An importance sampling method was applied to calculate the failure probability. In the importance sampling method, points are extracted from the kernel in the vicinity of a limit state. Considering the statistical distance as well as the learning function, additional experimental points were selected for the kriging metamodel. A stable numerical calculation method was applied to find the parameters of the kernel sampling density. The completeness of the Kriging metamodel was evaluated on the basis of possible changes in failure probability.
Evaluation of Greenhouse Gas Emission and Crop Growth in Chinese Cabbage Cultivation Using Biochar
이승규,조주식,김소희,박재혁,윤진주,강세원 한국토양비료학회 2022 한국토양비료학회지 Vol.55 No.4
This study was conducted to evaluate the changes in greenhouse gases and crop growth according to applicationlevels of rice hull biochar (BC) in upland (U) and greenhouse (G) fields. The field experiment was performedby applying a different input amount biochar (0, 1, 3 and 5 t ha-1) and all treatments were applied inorganicfertilizers by N-P2O5-K2O : 0.32-0.08-0.2 t ha-1. CO2 and N2O emissions in U and G fields were determinedusing closed chamber for crop cultivation period. The growth of Chinese cabbage by BC was positively affected,and the Fresh weight of Chinese cabbage in U and G Fields treated with BC increased up to 28.5% and 10.6%compared to UBC0t and GBC0t treatments. CO2 emissions in the BC treatment were increased. Compared with0 t ha-1 CO2 cumulative emission was increased in the range of UBC treatments 1.36 - 2.26 times and GBCtreatments 1.15 - 1.70 times. Compared with 0 t ha-1 N2O emission was decreased in the range of UBC treat ments 47.6 - 81.3 and GBC treatments. 27.4 - 54.7%. These results indicate that the application of BC in Chinesecabbage cultivation can have the effect of increasing the growth of Chinese cabbage and reducing greenhousegas emissions.
이승규,신정우,김태욱 한국항공우주학회 2014 한국항공우주학회 학술발표회 논문집 Vol.2014 No.11
유공압 방식 항공기 착륙장치의 동적거동은 대부분 완성도 높은 상용 소프트웨어로 예측한다. 상용 소프트웨어는 비교적 정확한 반면 모델링 구성 및 변경에 많은 시간이 소요된다. 설계 초기에는 잦은 설계 변경이 발생할 수 있으므로, 간단하며 모델링 변경이 쉬운 도구가 필요하다. 본 연구에서는 설계 초기에 필요한 간단한 착륙장치 성능 해석을 위해 유공압 착륙장치를 비선형 2자유도 질량/스프링/감쇠시스템으로 모델링하였다. 또한, 해석 결과를 착륙장치 낙하시험과 비교하여, 비선형 2자유도 모델의 유용성을 검토하였다. Usually, the performance of oleo-pneumatic landing gear is predicted by commercial softwares. While commercial softwares predict landing gear behavior more exactly, it takes a long time to construct or modify a model. Because frequent design modifications happen in a initial stage, a simple and easy tool is necessary. For a simple analysis of a oleo-pneumatic landing gear performance, a oleo-pneumatic landing gear is modeled by a 2 degree of freedom model. To review the availability of the model, the analysis results are compared with landing gear drop test results.
Two Zopheridae (Coleoptera: Tenebrionoidea) Species New to Korea and a Key to the Korean Genera
이승규,김일권,임종옥 한국동물분류학회 2017 Animal Systematics, Evolution and Diversity Vol.33 No.3
The Zopheridae Solier consisting of members from three previous families, Zopherinae Solier, Monommatinae Blanchard and Colydiinae Erichson, is considered the taxonomically most challenging group, and comprises more than 1,700 described species worldwide. The members of Zopheridae represent diverse morphological variations, and are difficult to separate morphologically from other tenebrionoid families. Two Zopheridae genera, Colobicus Latreille and Lasconotus Erichson, are identified for the first time in Korea, and two wood-boring species, C. hirtus (Rossi) and L. niponicus (Lewis), are newly reported in the Korean fauna. A key to the genera of Korean Zopheridae, and diagnoses, habitus photographs, and illustrations of diagnostic characters of the two species are provided.
이승규,김태범,고광필,김창희,김광택,정경진,김계환,정한,윤상진,오진규 대한비뇨의학회 2016 Investigative and Clinical Urology Vol.57 No.4
Purpose: For treating proximal ureteral calculi, treatment decision has been known still difficult to choose ureteroscopic lithotripsy (URS) or shockwave lithotripsy. The aims of our study are to identify the possible predictors for necessity of URS and to propose the Gachon University Ureteral Narrowing scoring system (GUUN score) as a helpful predictor. Materials and Methods: We evaluated 83 consecutive patients who underwent semirigid URS due to proximal ureteral calculi between April 2011 and February 2014 by a single surgeon. We reviewed patient characteristics and pre- and postoperative parameters and surgical records. We divided the patients into 2 groups (group 1, nondilation group; group 2, dilation group) according to whether or not balloon dilation was performed. A stepwise logistic regression was performed to identify the factors that predict dilatation. Receiver operating characteristic (ROC) curves were plotted and areas under the ROC curve (AUC) were calculated to GUUN score. Results: Mean patients' age and their stone size were 48.53±12.90 years and 7.79±2.57 cm, respectively. Significantly smaller stone size (p=0.009), lower stone density (p=0.005), and lower ureteral density differences between ureteral narrowing level and far distal ureter (UD) (p<0.001) were observed in group 1 (n=34) than in group 2 (n=49). GUUN score consists of age, stone size and UD (AUC, 0.938). Overall stone-free clearance rate was 85.5%. Conclusions: We suggest that the GUUN score is an excellent scoring system to predict the necessity of ureteral dilatation for decision making whether or not to perform surgical manipulation.