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권영혜(Younghye Kwon),장우진(Woojin Jang) 한국조명·전기설비학회 1989 한국조명·전기설비학회 학술대회논문집 Vol.1989 No.-
Low-cost and automated isolux diagram measurement system are investigated. The system is constructed with illuminance measurement array, analog multiplexer, A/D converter and 16-bit microcomputer. The experimental results show good agreement with the measured illuminance values. Decreasing the measure-spacing, the more accurate diagram can be obtained.
Chang Kwon, Ki,Choi, Seokhoon,Lee, Joohee,Hong, Kootak,Sohn, Woonbae,Andoshe, Dinsefa Mensur,Choi, Kyoung Soon,Kim, Younghye,Han, Seungwu,Kim, Soo Young,Jang, Ho Won The Royal Society of Chemistry 2017 Journal of Materials Chemistry A Vol.5 No.30
<▼1><P>Efficient photoelectrochemical hydrogen production is demonstrated by sulphur-doped molybdenum phosphide/p-Si heterojunctions.</P></▼1><▼2><P>We synthesized transferrable and transparent anion-engineered molybdenum disulfide thin-film catalysts through a simple thermolysis method by using [(NH4)2MoS4] solution and powder precursors with different sulphur/phosphorus weight ratios. The synthesized sulphur-doped molybdenum phosphide (S:MoP) thin film changed from a two-dimensional van der Waals structure to a three-dimensional hexagonal structure by introduction of phosphorus atoms in the MoS2 thin film. The S:MoP thin film catalyst, which is composed of cheap and earth abundant elements, could provide the lowest onset potential and the highest photocurrent density for planar p-type Si photocathodes. The density functional theory calculations indicate that the surface of S:MoP thin films absorb hydrogen better than that of MoS2 thin films. The structurally engineered thin film catalyst facilitates the easy transfer of photogenerated electrons from the p-Si light absorber to the electrolyte. Anion-engineering of the MoS2 thin film catalyst would be an efficient way to enhance the catalytic activity for photoelectrochemical water splitting.</P></▼2>
Epidemiological Investigation of Equine Hindlimb Ataxia with Setaria digitata in South Korea
Hyeshin Hwang,Younghye Ro,Hyun-Kyoung Lee,Ji-hyeon Kim,Kyung-Hyun Lee,Eun-Jin Choi,You-Chan Bae,ByungJae So,Dohoon Kwon,Ho Kim,Inhyung Lee 대한수의학회 2022 Journal of Veterinary Science Vol.23 No.5
Background: Since 2013, the number of requests for diagnosis for horses based on neurological symptoms has increased rapidly in South Korea. The affected horses have commonly exhibited symptoms of acute seasonal hindlimb ataxia. A previous study from 2015–2016 identified Setaria digitata as the causative agent. Objectives: This study is an epidemiological investigation to find out risk factors related to the rapid increase in hindlimb ataxia of horses due to aberrant parasites in South Korea. Methods: An epidemiological investigation was conducted on 155 cohabiting horses in 41 horse ranches where the disease occurred. The surrounding environment was investigated at the disease-causing horse ranches (n = 41) and 20, randomly selected, non-infected ranches. Results: Hindlimb ataxia was confirmed in nine cohabiting horses; this was presumed to be caused by ectopic parasitism. Environments that mosquitoes inhabit, such as paddy fields within 2 km and less than 0.5 km from a river, had the greatest association with disease occurrence. Conclusions: Most horse ranches in South Korea are situated in favorable environments for mosquitoes. Moreover, the number of mosquitoes in the country has increased since 2013 due to climate change. Additional research is required; however, these data show that it is necessary to establish guidelines for the use of anthelmintic agents based on local factors in South Korea and disinfection of the environment to prevent disease outbreaks.
펄프⋅제지 업종에서의 통합환경관리제도 적용 현황 및 최적가용기법 고도화 조사
고제운(Jeun Ko),윤영혜(Younghye Yoon),주환홍(Hwan-Hong Joo),권예령(Yeelyung Kwon),김상현(Sang-Hyoun Kim) 유기성자원학회 2022 유기성자원학회 학술발표대회논문집 Vol.2022 No.추계
2017년부터 통합환경관리제도가 시행되었다. 오염 매체별로 분리하여 따로 관리하던 기존의 방식과는 다르게 통합환경관리제도는 사업장 전체를 통합하여 최적가용기법(환경, 경제, 기술의 수준을종합적으로 고려한 오염물질 처리방식)을 통해 오염물질 배출을 최소화하는 것에 그 목적이 있다. 펄프⋅제지 업종은, 증해, 표배, 초지 등의 공정에서 폐수 배출이 많고 여러 공정에 물과 증기를 사용하기 때문에 폐수처리 중심으로 최적가용기법의 동향에 대한 문헌조사를 실시하였다. 사업장에서의 폐수처리는 변화의 단계에 있다. 2022년부터 국내에서 폐수 내 유기물질 측정지표는COD에서 TOC로 전환되었고, 그러므로 TOC 기준으로 폐수 배출 현황을 파악하여 폐수처리 신기술을 통한 최적가용기법 고도화를 제안하였다. 현재 국내 기준서는 수질오염물질을 pH, BOD, COD, SS, T-N, T-P 등의 중점 수질 오염물질과 기타관리항목 오염물질로 나누나, EU 기준서는 중점수질오염물질에서 그치지 않고, 염분, 색도등의 새로운 기준이 추가되었고 구리, 아연, 클로로페놀, 폴리염화 바이페닐과 같은 물질들이 오염물질에 추가되어 이들 또한 엄격하게 관리된다. 현행 통합환경관리제도는 이러한 차이들을 좁히는 과정에 있으므로 이에 상응하는 최적가용기법 또한 보다 정제될것으로 예측된다.
Sunghwan Ji,Hee-Won Jung,Jeounghee Kim,Younghye Kwon,Yeonmi Seo,Semin Choi,Hyoun Jin Oh,백지연,Il-Young Jang,Eunju Lee,for the Asan Multidisciplinary Committee for Seniors (AMCS) 대한노인병학회 2023 Annals of geriatric medicine and research Vol.27 No.2
Background: Falls are a major concern among hospitalized adults, and it is essential to identify high-risk patients to prevent falls. This retrospective cohort study conducted at the Asan Medical Center, Korea, compared the screening abilities of the at-point Clinical Frailty Scale (CFS) and Morse Fall Scale (MFS) to identify patients at high risk for falls among hospitalized adults. Methods: We assessed the records of at-point CFS, MFS, and fall incidence during hospitalization of 2,028 patients aged 18 or older included in this study. We calculated the sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and area under the curve (AUC) for each tool. Results: Twenty-five patients (1.23%) experienced falls during hospitalization. The mean at-point CFS score was significantly higher in those with falls than in those without falls. The mean MFS score did not differ significantly between the two groups. The optimal cutoff points for the at-point CFS and MFS scores were 5 and 45, respectively. At these cutoffs, the at-point CFS demonstrated a sensitivity of 76.0%, specificity of 54.0%, PPV of 2.0%, and NPV of 99.4%, whereas the MFS demonstrated a sensitivity of 60.0%, specificity of 68.1%, PPV of 2.2%, and NPV of 99.4%. The AUC values for the at-point CFS and MFS were 0.68 and 0.63, respectively, with no significant difference (p=0.31). Conclusion: The at-point CFS is a valid screening tool for assessing fall risk in hospitalized adults, as it effectively identifies fall risk with a performance similar to that of the MFS.
Park Keun-tae,Oh Mihyang,Joo Younghye,Han Jong-Kwon 아세아·태평양축산학회 2023 Animal Bioscience Vol.36 No.2
Objective: Stress factors such as high temperatures, overcrowding, and diurnal temperature range exert profound negative effects on weight gain and productivity of broiler chickens. The potential of gamma aminobutyric acid (GABA) as an excitatory neurotransmitter was evaluated under various stress conditions in this study. Methods: The experiment was conducted under four different environmental conditions: normal, high temperature, overcrowded, and in an overcrowded-diurnal temperature range. The experimental groups were divided into (–) control group without stress, (+) control group with stress, and G50 group (GABA 50 mg/kg) with stress. Weight gain, feed intake, and feed conversion ratio were measured, and stress reduction was evaluated through hematologic analysis. Results: The effects of GABA on broilers in four experimental treatments were evaluated. GABA treated responded to environmental stress and improved productivity in all the experimental treatments. The magnitude of stress observed was highest at high temperature, followed by the overcrowded environment, and was least for the overcrowded-diurnal temperature range. Conclusion: Various stress factors in livestock rearing environment can reduce productivity and increase disease incidence and mortality rate. To address these challenges, GABA, an inhibitory neurotransmitter, was shown to reduce stress caused due to various environmental conditions and improve productivity.
rpoB 염기서열 분석을 이용한 응고효소 음성 포도알세균 분자 동정
성원진,김단일,김은경,고대성,노영혜,김재홍,권혁준,Seong, Won-Jin,Kim, Danil,Kim, Eun-Kyung,Ko, Dae-Sung,Ro, Younghye,Kim, Jae-Hong,Kwon, Hyuk-Joon 대한수의학회 2018 大韓獸醫學會誌 Vol.58 No.1
Bovine mastitis (BM) has resulted in enormous economic loss in the dairy industry and coagulase-negative staphylococci (CNS) have caused subclinical BM. Although VITEK 2 GP ID card (VITEK 2) has been used for CNS identification, the probability of identification varies. The rpoB sequence typing (RSTing) method has been used for molecular diagnosis and epidemiology of bacterial infections. In this study, we undertook RSTing of CNS and compared the results with those of VITEK2 and 16S rRNA gene sequencing. As compared VITEK2, the molecular-based methods were more reliable for species identification; moreover, RSTing provided more molecular epidemiological information than that from 16S rRNA gene sequencing.