http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Geon Hui Kim,Hoyong Sung,Yeun Ryu,Jungjun Lim,Joon-Sik Kim,Hak Kyun Kim,Yeon Soo Kim 한국역학회 2021 Epidemiology and Health Vol.43 No.-
OBJECTIVES: The aim of this study was to identify the stepping cadence patterns in Korean adults by using objectively measured accelerometer data to analyze the time spent in each cadence category by sex and age. METHODS: During the 2014-2015 Korean National Health and Nutrition Examination Survey, 1,703 males and females aged 19-64 years provided at least 1 valid day of data (wearing an accelerometer ≥10 hr/d). The mean cumulative time and percentage per day in 8 cadence categories (0, 1-19, 20-29, 30-59, 60-79, 80-99, 100-119, and ≥120 steps/min) by sex and age group were calculated. RESULTS: Cumulative time and percentage per day decreased across the incremental cadence categories. Participants spent 360.08±2.56 min/d in the non-movement cadence category and 361.50±2.28 min/d in the incidental movement cadence category. However, they spent only about 18.1 min/d (2.1%) at ≥100 steps/min. Males spent significantly more time in the cadence categories of sporadic movement, purposeful steps, slow walking, and medium walking, but the other categories, except for brisk walking, had higher values in females (p<0.001). The older age group spent less time in non-movement cadence categories, and the youngest and oldest groups spent more time at a higher cadence (≥100 steps/min) than the other age groups. Similar patterns were found in a subgroup analysis by sex. CONCLUSIONS: Korean adults spent most of their time at a low cadence and only a few minutes at a high cadence (≥100 steps/min); this trend was consistent across sex and age groups.
The Optimized Partial Insulator Isolation MOSFET (PiFET)
Kim, Young Kwon,Lee, Jin Sung,Kim, Geon,Park, Taesik,Kim, Hui Jung,Cho, Young Pyo,Park, Young June,Lee, Myoung Jin The Institute of Electronics and Information Engin 2017 Journal of semiconductor technology and science Vol.17 No.5
The proposed partial insulator isolation MOSFET (PiFET) structure, shows the characteristics of improved DIBL and high threshold voltage, using the optimized buried partial insulator shape with a small dielectric constant, compared with the conventional planar MOSFET and silicon on insulator (SOI) structures, even though it has the same doping profile.
Kim, Ju Ang,Yun, Hui-suk,Choi, Young-Ae,Kim, Jung-Eun,Choi, So-Young,Kwon, Tae-Geon,Kim, Young Kyung,Kwon, Tae-Yub,Bae, Myung Ae,Kim, Nak Jeong,Bae, Yong Chul,Shin, Hong-In,Park, Eui Kyun IPC Science and Technology Press 2018 Biomaterials Vol.157 No.-
<P><B>Abstract</B></P> <P>Incorporating bioactive molecules into synthetic ceramic scaffolds is challenging. In this study, to enhance bone regeneration, a magnesium phosphate (MgP) ceramic scaffold was incorporated with a novel indene compound, KR-34893. KR-34893 induced the deposition of minerals and expression of osteoblast marker genes in primary human bone marrow mesenchymal stem cells (BMSCs) and a mouse osteoblastic MC3T3-E1 cell line. Analysis of the mode of action showed that KR-34893 induced the phosphorylation of MAPK/extracellular signal-regulated kinase and extracellular signal-regulated kinase, and subsequently the expression of bone morphogenetic protein 7, accompanied by SMAD1/5/8 phosphorylation. Accordingly, KR-34893 was incorporated into an MgP scaffold prepared by 3D printing at room temperature, followed by cement reaction. KR-34893-incorporated MgP (KR-MgP) induced the expression of osteoblast differentiation marker genes <I>in vitro</I>. In a rat calvaria defect model, KR-MgP scaffolds enhanced bone regeneration and increased bone volume compared with MgP scaffolds, as assessed by micro-computed tomography and histological analyses. In conclusion, we developed a method for producing osteoinductive MgP scaffolds incorporating a bioactive organic compound, without high temperature sintering. The KR-MgP scaffolds enhanced osteoblast activation <I>in vitro</I> and bone regeneration <I>in vivo</I>.</P>
FN-tunneling-current Modeling in a Recessed-channel Structure
Kim, Young Kwon,Park, Taesik,Lee, Jin Sung,Kim, Geon,Kim, Hui Jung,Cho, Young Pyo,Park, Young June,Lee, Myoung Jin The Institute of Electronics and Information Engin 2017 Journal of semiconductor technology and science Vol.17 No.5
The FN-tunneling gate-current model for the three-dimensional recessed-channel structure including a geometrical effect is obtained. Further, the measurement results in the fabricated 60-nm DRAM chip are well fitted using our modeled simulation results in consideration of the cylindrical coordinate and the poly-depletion effect. As the recessed structure was scaled down to sub-50-nm technology with a very thin oxide thickness and a small radius, for which the reliability issues were considered, the geometrical effect seriously affected the memory-sensing margin. Our model presents a sound solution for the attainment of a fast and accurate FN-tunneling gate current to resolve the reliability issues of memory-cell transistors.
고관절 각도에 따른 대퇴사두근의 Q-setting 운동 시 근활성도에 미치는 영향
이건철 ( Geon Cheol Lee ),김종수 ( Jong Su Kim ),김성훈 ( Sung Hun Kim ),김명근 ( Myung Keun Kim ),김지원 ( Ji Won Kim ),추설희 ( Seol Hui Chu ),김보라 ( Bo Ra Kim ) 대한통합의학회 2014 대한통합의학회지 Vol.2 No.1
Purpose : The aim of this study was to find out differences between muscle activity of quadriceps according to hipangle. Method : 40 healthy adults produced maximum isometric muscle contraction of quadriceps femoris and each part of the quadriceps femoris were measured with a surface EMG in hip joint angle of 90°, 135°, 180°. Result : There was no significant difference between muscle activity of vastus medialis and lateralis according to hip angle. But there was significant difference in muscle activity of rectus femoris and the muscle activity was maximum at 135 degrees of hip angle. Conclusion : In conclusion, maximum muscle activation of rectus femoris is affected by hip angle, and the findingsfrom this study may be helpful for physical therapists in selecting hip position when instructing patients to do Q-setting exercise. So, we suggest that patients perform Q-setting exercise at 135 degrees of hip angle for the best result.