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하정기,문무홍,박응복,박기서 경상대학교 축산진흥연구소 1973 畜産振興硏究所報 Vol.1 No.1
An epidemiologic survey on the parasitic round worms of 40 Korean native goats by direct examination of a mature round worm in the western province of Gyungsangnam-Do, was attempted to reveal its species infected, the infection rate and the proportion of males to females. The results obtained are summarized as follows: 1. Seven species of parasitic round worms were found from examined goats and the infection rate of each worm was as follows; Hemochus controtus…62.5% Oesophagostomum columbianum…60% Oesophagostomum colubriformis…32.5% Trichostrongylus columbianum…50% Stronogylloides papillosus…75% Trichuris ovis…10% Skrijabinema ovis…2.5% The proportion of males and females was at the ratio of 1 male to 1.2 females or 1 male to 3 females.
PA Map(Pulse Analysis Map)을 이용한 새로운 부분방전 패턴인식에 관한 연구
金智鴻(Ji-Hong Kim),金正泰(Jeung-Tae Kim),金鎭基(Jin-Gi Kim),具滋允(Ja-Yoon Koo) 대한전기학회 2007 전기학회논문지 Vol.56 No.6
Since one decade, the detection of HFPD (High frequency Partial Discharge) has been proposed as one of the effective method for the diagnosis of the power component under service in power grids. As a tool for HFPD detection, Metal Foil sensor based on the embedded technology has been commercialized for mainly power cable due to its advantages. Recently, for the on-site noise discrimination, several PA (Pulse analysis) methods have been reported and the related software, such as Neural Network and Fuzzy, have been proposed to separate the PD (Partial Discharge) signals from the noises since their wave shapes are completely different from each other. On the other hand, the relevant fundamental investigation has not yet clearly made while it is reported that the effectiveness of the current methods based on PA is dependant on the types of sensors. Moreover, regarding the identification of the vital defects introducible into the Power Cable, the direct identification of the nature of defects from the PD signals through Metal Foil coupler has not yet been realized. As a trial for solving above shortcomings, different types of software have been proposed and employed without any convincing probability of identification. In this regards, our novel algorithm "PA Map" based on the pulse analysis is suggested to identify directly the defects inside the power cable from the HFPD signals which is output of the HFCT and metal foil sensors. This method enables to discriminate the noise and then to make the data analysis related to the PD signals. For the purpose, the HFPD detection and PA (Pulse Analysis) system have been developed and then the effect of noise discrimination has been investigated by use of the artificial defects using real scale mockup. Throughout these works, our system is proved to be capable of separating the small void discharges among the very large noises such as big air corona and ground floating discharges at the on-site as well as of identifying the concerned defects.
Shin, Seung Wook,Oh, Jeung Pyo,Hong, Chang Woo,Kim, Eun Mi,Woo, Jeong Ju,Heo, Gi-Seok,Kim, Jin Hyeok American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.2
<P>Mechanically driven light emission from particles embedded in elastomer films has recently attracted interest as a strong candidate for next-generation light sources on display devices because it is nondestructive, reproducible, real-time, environmentally friendly, and reliable. The origin of mechanoluminescence (ML) obtained from particles embedded in elastomer films have been proposed as the trapping of drifting charge carriers in the presence of a piezoelectric field. However, in this study, we propose a new origin of ML through the study of the microstructure of a Cu-doped ZnS particles embedded in an elastomer composite film with high brightness using transmission electron microscopy (TEM) to clearly demonstrate the origin of ML with respect to the microstructure of ML composite films. The TEM characterization of the ML composite film demonstrated that the Cu-doped ZnS particles were fully encapsulated by a 500 nm thick Al layer, which acts as an electron source for ML emission. Furthermore, we fabricated a flexible electro-mechanoluminescence (EML) device using a Cu-doped ZnS particles embedded in a flexible elastomer composite film. Our research results on a new emission mechanism for ML and its application in flexible light generating elastomer films represent an important step toward environmentally benign and ecofriendly flexible electro-mechanoluminescent lighting devices.</P>
First Report of Melon Soft Rot Disease Caused by Pectobacterium brasiliense in Korea
Kyoung-Taek Park,Leonid N. Ten,Chang-Gi Back,Soo-Min Hong,Seung-Yeol Lee,Jeung-Sul Han,Hee-Young Jung 한국식물병리학회 2023 식물병연구 Vol.29 No.3
In May 2021, characteristic soft rot symptoms, including soft, watery, slimy, black rot, wilting, and leaf collapse, were observed on melon plants (Cucumis melo) in Gokseong, Jeollanam-do, Korea. A bacterial strain, designated KNUB-06-21, was isolated from infected plant samples, taxonomically classified, and phylogenetically analyzed using 16S rRNA and housekeeping gene sequencing. Strain KNUB-06-21 was also examined for compound utilization using the API ID 32 GN system and strain KNUB-06-21 was identified as Pectobacterium brasiliense. Subsequent melon stem inoculation studies using strain KNUB-06-21 showed soft rot symptoms similar to field plants. Re-isolated strains shared phenotypic and molecular characteristics with the original P. brasiliense KNUB-06-21 strain. To our knowledge, ours is the first report of P. brasiliense causing melon soft rot disease in Korea.
Reliability Assessment on Different Designs of a SMES System Based on the Reliability Index Approach
Kim, Dong-Wook,Sung, Young-Hwa,Jeung, Gi-Woo,Jung, Sang-Sik,Kim, Hong-Joon,Kim, Dong-Hun The Korean Institute of Electrical Engineers 2012 Journal of Electrical Engineering & Technology Vol.7 No.1
The current paper presents an effective methodology for assessing the reliability of electromagnetic designs when considering uncertainties of design variables. To achieve this goal, the reliability index approach based on the first-order reliability method is adopted to deal with probabilistic constraint functions, which are expressed in terms of random design variables. The proposed method is applied to three different designs of a superconducting magnetic energy storage system that corresponds to initial, deterministic, and roust designs. The validity and efficiency of the method is investigated with reference values obtained from Monte Carlo simulation.