http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
코로나19로 인한 청소년의 경제적 상태 변화에 따른 한국 청소년의 식생활 및 건강에 미치는 영향
김호경,남형경,Kim, Ho-Kyoung,Nam, Hyong-Kyong 한국산업융합학회 2022 한국산업융합학회 논문집 Vol.25 No.5
This study aims to understand the influence of COVID-19 on youth daily life by analyzing the correlation between youth health and diet according to whether economic status has changed due to COVID-19 and to provide basic data on program construction for the welfare of socially marginalized adolescents. As a result of the study, the proportion of respondents who answered that there was a change in economic status at a high rate for decreased academic performance (p<0.001), stress perception, and suicidal thoughts (p<0.001), and the proportion of decreased number of breakfasts and increased fast food consumption (p<0.001) was also high. These results of the study are thought to be the reason for the increase in adolescents who are alienated due to changes in home conditions due to COVID-19, which is expected to affect the physical and mental health of adolescents who lack communication and guidance, and the increase in delinquents rate due to reduced academic concentration and increased junk food intake. Therefore, through this study, it can be helpful to use basic data for the development of welfare programs such as non-face-to-face as basic data for teenagers alienated from COVID-19.
Characterization of Conduction Mechanism in Cu Schottky Contacts to p-type Ge
김호경,Se Hyun Kim,Chan Yeong Jung 한국전기전자재료학회 2014 Transactions on Electrical and Electronic Material Vol.15 No.6
Germanium (Ge) is a promising material for next generation nanoelectronics and multiple junction solar cells. This work investigated the electrical properties in Cu/p-type Ge Schottky diodes, using current-voltage (I-V )measurements. The Schottky barrier heights were 0.66, 0.59, and 0.70 eV from the forward ln(I)-V, Cheung, and Nordemethods, respectively. The ideality factors were 1.92 and 1.78 from the forward ln(I)-V method and Cheung method,respectively. Such high ideality factor could be associated with the presence of an interfacial layer and interface statesat the Cu/p-Ge interface. The reverse-biased current transport was dominated by the Poole-Frenkel emission ratherthan the Schottky emission.
A comparative electrical transport study on Cu/n-type InP Schottky diode measured at 300 and 100 K
김호경,Chan Yeong Jung,Se Hyun Kim,Yunae Cho,김동욱 한국물리학회 2016 Current Applied Physics Vol.16 No.1
Two oxygen plasma treated InP samples with different plasma powers of 100 and 250 W were prepared and a comparative study on the electrical properties of Cu/n-type InP Schottky diode measured at 300 and 100 K was performed to investigate the current transport mechanism in detail. The forward and reverse bias currentevoltage (IeV) characteristics were analyzed with considering various transport models. The fitting to the forward bias IeV characteristics revealed that relatively high ideality factor at 300 K for untreated sample were related with the generation-recombination (GR) current and the large E00 value at 100 K for 100 W plasma treated sample were associated with more significant tunneling effect. The analyses on the reverse bias current characteristics showed the suitable current transport model has changed from thermionic emission (TE) to TE combined with barrier lowering for both untreated and 250 W treated samples and from TE þ BL to thermionic field emission for 100 W treated sample with increasing temperature from 100 to 300 K.
유자의 항 Influenza 바이러스 A형 활성에 관한 연구
김호경,고병섭,전원경,Kim, Ho-Kyoung,Ko, Byoung-Seob,Jeon, Won-Kyung 한국생약학회 2000 생약학회지 Vol.31 No.1
To evaluate anti-influenza virus activity of 113 specimens of Korean traditional medicine both water and methanol extracts were examined using haemagglutination inhibition test. The water extract from Citrus junos was found to inhibit influenza virus A/Taiwan/l/86(H1N1). The survival rates of virus were determined by in situ cellular enzyme-linked immunosorbent assay. The water extract of Citrus junos was fractionated by chromatographic separating using Amberlite XAD-4, 40% MeOH and 60% MeOH layer had antiviral activity. The half inhibition concentration $(IC_{50})$ of 40% MeOH layer on survival of influenza virus was $MIC>361.5{\mu}g/ml$ and $IC_{50}$ value of fr. 40-4 fractionated from 40% MeOH layer was $677.19{\mu}g/ml$. These results suggested that the fractions of Citus junos have potent anti-influenza A virus activity.
$550^{\circ}C$에서의 2.25Cr-1Mo 강 용접부의 고온 균열성장 거동에 관한 연구
김호경,정강,정진성,Kim, Ho-Kyung,Chung, Kang,Chung, Chin-Sung 대한용접접합학회 2001 대한용접·접합학회지 Vol.19 No.3
Both creep deformation and creep crack growth experiments have been conducted on 2.25Cr-1Mo steel weldment in order to provided an information on residual life prediction of structural component weldment containing a crack. The stress exponent of creep deformation equation for the base metal and weldment at 823k were found to be 10.2 and 7.3, respectively. These two values could be assumed that dislocation climb processes are controlling the creep deformation of both materials. The creep rate of the weldment was very low, compared with that of base metal under the same applied stress. Whereas the creep crack growth rate of the weldment was almost twice higher than that of base metal under the fixed value of $C^*$. This may indicate that the weldment is stronger than the base metal in view of creep deformation and is brittle during creep crack growth due to the intrinsic microstructure of banite and relatively higher and Mn contents.
김호경,서정인,Kim, Ho Kyung,Suh, Jeong In 대한토목학회 1994 대한토목학회논문집 Vol.14 No.6
앵커리지 (Anchorage)가 주케이블을 지지하는 전형적인 현수교에서는 행거를 가설한 후에 보강형을 순차적으로 가설하기 때문에 시공시 행거에 별도의 긴장력이 필요없다. 이와는 달리 자정식 현수교는 가교각으로 보강형을 지지한 후 행거를 설치하게 된다. 따라서 행거 가설시 초기 긴장력을 가할 필요가 있으며 이 후 계속되는 시공과정에 의해 장력이 지속적으로 변화하게 된다. 따라서 행거의 가설방법을 변화시켜가며 이에 따른 행거장력의 변화 양상을 파악하여 가장 효율적으로 행거를 가설할 수 있는 방법을 결정할 필요가 있다. 이를 위하여 본 연구에서는 해석적인 방법을 제시하였다. 현수교 시공의 진행에 따라 단계적으로 변화하는 구조계를 모사할 수 있는 사공단계해석 알고리즘을 제시하였다. 또한 자정식 현수교에서 발생할 수 있는 기하비선형 해석모델을 제시하였다. 실물 교량을 대상으로 제시된 해석방법에 따라 가장 효과적이라고 생각되는 시공방법을 제시하였다. Because the stiffening girders are constructed after the installation of hangers for typical suspension bridge, no additional tensioning to hangers in construction is necessary for this bridge type in which main cable is earth-anchored. However, for self-anchored suspension bridge, hangers are installed after temporarily supporting stiffening girders constructed in previous stage. Therefore, initial tension is required on installing hangers. Tension of hangers varies as the construction proceeds. Hence, it is necessary to determine the most efficient method of installing hangers among several methods. This study presents finite element procedures and the algorithms of construction stage analysis to simulate construction processes. Geometric nonlinear analysis scheme is also included. The most effective method regarding the installation of hangers is presented through the examples of actual bridge model.