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제갈덕주(Deok Ju Jegal) 언어과학회 2014 언어과학연구 Vol.0 No.69
The Purpose of this study is to examine the general structure of polysemy and facets. Polysemous words are understood that one lexeme has many sememe. But in recent years, A study about facets and multi-faceted words have been conducted by Cruse(1995), Lim Ji-Ryong(2011) etc. Lim Ji-Ryong(2011) argues that Korean words consist of 3 types. They are monosemous, polysemous, and faceted words. In this paper, I will also accept such an opinion. But I don`t agree that facets are a kind of a word type. I think that polysemy and facets are a kind of characters on a word. So In Jegal Deok-Ju(2013), I have argued that. And In this paper, I will examine the structure where polysemy and facts coexist. To achieve this, this study will be based on Ogden·Richards(1923).
Implementation of three-phase four-leg inverter using SiC MOSFET for UPS applications
Jegal, Jun-Hyeok,Kwon, Minho,Oh, Chang-Yeol,Kim, Kiryong,Lee, Jong-Pil The Korean Institute of Power Electronics 2021 JOURNAL OF POWER ELECTRONICS Vol.21 No.1
This study implemented a 30 kW, 750 V<sub>dc</sub>, silicon-carbide (SiC)-based uninterruptible power supply(UPS) applied it on a three-phase four-leg inverter. For component selection, LC filter and DC-link capacitor were designed based on the PSIM simulation. SiC MOSFET was used to achieve higher efficiency and better reliability than the conventional Si IGBT-based UPS applications. Furthermore, desaturation (DeSat) protection method was applied to protect the overcurrent during the short-circuit condition of SiC MOSFET. Thus, the DeSat protection method was applied to SiC MOSFET, thereby enabling a 1 ㎲ protection by complementally switching and zener diode voltage optimization. Accordingly, the transient time of the DeSat protection can be disregarded, thereby enabling fast protection. Meanwhile, several topologies have been studied for unbalanced loads compensation. The current research used a three-phase four-leg inverter topology for compactness and neutral current control. In addition, voltage compensation became possible even in unbalanced load condition by introducing a dual-loop controller for the three-phase four-leg inverter. A dual-loop controller comprises PR and PI controllers to the stationary αβo and synchronous dqo reference frames, respectively. Thermal and efficiency tests were also performed in the rated power test. Under a 30 kW load condition, the surface epoxy molding compound temperature of SiC MOSFET was approximately 72 ℃, and the highest efficiency was approximately 99.1% under 10 kW load condition. Finally, the effectiveness of the implementation was demonstrated through the experiment results.
Tyrosinase inhibitory flavonoid from <i>Juniperus communis</i> fruits
Jegal, Jonghwan,Park, Sang-a,Chung, KiWung,Chung, Hae Young,Lee, Jaewon,Jeong, Eun Ju,Kim, Ki Hyun,Yang, Min Hye Informa UK (TaylorFrancis) 2016 Bioscience, biotechnology, and biochemistry Vol.80 No.12
<P>The fruits of Juniperus communis have been traditionally used in the treatment of skin diseases. In our preliminary experiment, the MeOH extract of J. communis effectively suppressed mushroom tyrosinase activity. Three monoflavonoids and five biflavonoids were isolated from J. communis by bioassay-guided isolation and their inhibitory effect against tyrosinase was evaluated. According to the results of all isolates, hypolaetin 7-O--xylopyranoside isolated from J. communis exhibited most potent effect of decreasing mushroom tyrosinase activity with an IC50 value of 45.15M. Further study provided direct experimental evidence for hypolaetin 7-O--D-xylopyranoside-attenuated tyrosinase activity in -MSH-stimulated B16F10 murine melanoma cell. Hypolaetin 7-O--D-xylopyranoside from the EtOAc fraction of J. communis was also effective at suppressing -MSH-induced melanin synthesis. This is the first report of the enzyme tyrosinase inhibition by J. communis and its constituent. Therapeutic attempts with J. communis and its active component, hypolaetin 7-O--D-xylopyranoside, might be useful in treating melanin pigmentary disorders.</P>
Jegal, Hyuk,Jun, Hyun Ju,Kim, Ki Jong International Academy of Physical Therapy Research 2015 Journal of International Academy of Physical Ther Vol.6 No.1
The purpose of this study was to investigate the relationship the quality of life, osteoarthritis and osteoporosis in the Republic of Korea. This study was utilized raw data from the 2010 KCHS. In total, 229,229 individuals participated in the 2010 survey. The final analysis was identified 22,545 individuals who had been diagnosed by a doctor with arthritis or osteoporosis. To identify the relationship between the quality of life - related after treated or treating of arthritis, osteoporosis, A multiple linear regression analysis was performed. Treating group for osteoarthritis of their quality of life has statistically been less than after treated group(B=-.068, p<.001). Treating group for osteoporosis of their quality of life has statistically been less than after treated group(B=-.083, p<.001). Non-treatment group who was diagnosed by doctor, but no treated subject for osteoarthritis of their quality of life has statistically been less than after treated group(B=-.075, p<.001). Non-treatment group that was diagnosed by doctor, but no treated subject for osteoporosis of their quality of life has statistically been less than after treated group(B=-.045, p<.001). Non-treatment group who was diagnosed by doctor, but no treated subject for osteoporosis and arthritis of their quality of life has statistically been less than after treated group(B=-.0121, p<.001). as a result of those data, we understand that the decision maker for treatment has been chosen by quality of life, including pain, mobility activity and so on.
Jegal, Hyuk,Kim, Ki Jong,Jun, Hyun Ju International Academy of Physical Therapy Research 2014 Journal of International Academy of Physical Ther Vol.5 No.2
The aim of this research was to investigate how the effects of body supported treadmill training with visual feedback affect the gait factors of stroke patients. Thirty subjects (21 male, 9 female) with a diagnosis of stroke were taken to the hospital to participate in this study. The subjects received body supported treadmill training with visual feedback. The training was executed for 6 minutes, 3 times a day per week for 19 weeks after general exercise. The effects of the visual feedback in the body supported treadmill training were evaluated by measuring the average gait cycle and the average step length of the affected and unaffected. The collected data were statistically analyzed by using a paired t-test. The results of this study were a significant improvement of the average gait cycle and no statistically significant difference of the average step length. The gait cycle average had a statistically significant difference in gender, age, etiology, paretic side, and step length average. There was no statistically significant difference in infarction within etiology. Therefore, it was necessary to apply the easy and simple with the treadmill training in the rehabilitation of the stroke patients. This study will require a variety of outcome measures related to the effects of treadmill training with gait factors.
Jegal, Jong-Pil,Kim, Kwang-Bum Elsevier 2013 Journal of Power Sources Vol.243 No.-
<P><B>Abstract</B></P> <P>Carbon nanotube-embedding LiFePO<SUB>4</SUB> is synthesized via a solution-based two-step method. The embedded carbon nanotubes are found to improve electron and ion transfer, resulting in excellent high rate capability. An electrode of the nanocomposite, prepared without additional conducting agent, delivers a discharge capacity of 165 mAh g<SUP>−1</SUP> at 0.1 C, 120 mAh g<SUP>−1</SUP> at 30 C, and 78 mAh g<SUP>−1</SUP> at 120 C, based on the weight of LiFePO<SUB>4</SUB>. Furthermore, the discharge curve at a discharge rate of 60 C retains the potential plateau above 3.0 V.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CNTs embedded within LiFePO<SUB>4</SUB> allows for high electronic conductivity. </LI> <LI> Cross-linked CNT imparts interconnected pore structure to the electrode. </LI> <LI> It shows excellent rate capability up to 100 C without additional conducting agent. </LI> <LI> Discharge capacity at 60 C was mainly obtained from the plateau retained above 3.0 V. </LI> </UL> </P>