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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).
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화학응집제에 의한 전처리 후 폴리아미드 RO-분리막에 의한 염색폐수처리
Jegal Jonggeon,Mo Joonghwan Hwang,Jeong Eun,Lee Kew Ho,Kim Jaephil 한국막학회 2004 멤브레인 Vol.14 No.3
폴리아미드 역삼투막을 이용하여 염색폐수를 처리하였다. 염색폐수를 멤브레인 공정에 적용하기 전에 알럼, 페릭 클로라이드, HOC-100와 같은 화학응집제를 이용하여 먼저 처리하였다. 이러한 전처리가 분리막에 의한 폐수처리 공정에 어떠한 영향을 주는지 알아보기 위하여 최적의 응집/침전 조건을 찾았다. 사용된 모든 응집제에 있어서, 전처리된 폐수의 COD와 UV-흡수도는 약 70% 정도의 감소를 보였다. 이렇게 전처리된 폐수를 다시 분리막 공정으로 처리하였다. 전처리 시 사용된 응집제들이 분리막 공정에서 어떻게 분리막 오염에 영향을 주는지를 조사하였으며, 그 결과 HOC-100가 폐수 내에 존재하는, 분리막 오염을 유발하는 물질 제거에 가장 좋은 효과를 나타내는 것을 알 수 있었다. Treatment of a dyeing wastewater was carried out using polyamide RO-membranes. Before applying the wastewater to the membrane process, it was pretreated with various chemical coagulants such as alum, ferric chloride and HOC-100A. In order to see the effect of the pretreatment on the membrane separation process, the optimum conditions for the coagulation and sedimentation process were sought. As a result, by the pretreatment, for all the coagulants used, the chemical oxygen demand (COD) and UV-absorbance of the wastewater were lowered by more than 70%. The pretreated wastewater was then applied to the membrane process. The effect of the coagulants used for the pretreatment on the membrane fouling was studied. From this study, it was found that the HOC-100A was the best out of the coagulants used for the removal of the materials that could cause membrane fouling.
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The Utility of a Three-Dimensional Approach with T-Shaped Osteotomy in Osseous Genioplasty
Jegal, Jung Jae,Kang, Seok Joo,Kim, Jin Woo,Sun, Hook Korean Society of Plastic and Reconstructive Surge 2013 Archives of Plastic Surgery Vol.40 No.4
Background Facial beauty depends on the form, proportion, and position of various units of the face. In terms of the frontal view and facial profile, the chin is the most prominent aesthetic element of the lower third of the face. Many methods have been implemented to obtain good proportions of the lower face. In this study, we applied the T-shaped genioplasty method to correcting chin deformities. Methods All of the procedures in 9 cases were performed under general anesthesia. For genioplasty, a horizontal cutting line and 1 or 2 vertical cutting lines were drawn 5 mm below the mental foramen. Osteotomed bone segments of the chin were used for horizontal widening using bone grafts or for horizontal shortening. Likewise, they were used as bone grafts for vertical lengthening or vertical shortening. The bone segments were approximated in the midline and held in place using miniplates. Results The postoperative appearance of the 9 cases showed that the lower third of the face had been naturally changed. At the same time, vertical lengthening or shortening, and horizontal widening or shortening could be implemented during the operation. Satisfactory results were obtained based on reviews of the patients' preoperative and postoperative photographs. The patients were also satisfied with the outcomes. Conclusions Using T-shaped genioplasty, we efficiently adjusted the shape and position of the chin to obtain good proportions of the lower face and change its contour to obtain an aesthetically appealing oval face in accordance with East Asians' aesthetic preferences.
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Physiology Is a Stronger Predictor of Survival than Pathology in Fibrotic Interstitial Pneumonia
Jegal, Yangjin,Kim, Dong Soon,Shim, Tae Sun,Lim, Chae-Man,Do Lee, Sang,Koh, Younsuck,Kim, Woo Sung,Kim, Won Dong,Lee, Jin Seong,Travis, William D.,Kitaichi, Masanori,Colby, Thomas V. American Thoracic Society 2005 American journal of respiratory and critical care Vol.171 No.6
<P>The histopathologic pattern provides the most important prognostic marker for idiopathic interstitial pneumonia; however, studies have suggested that short-term changes in lung function may be more important. We investigated the prognostic factors for fibrotic interstitial pneumonia. The clinical features and follow-up course of 179 patients (131 with idiopathic pulmonary fibrosis and 48 with nonspecific interstitial pneumonia; 41 fibrotic types and 7 cellular) were analyzed retrospectively. The lung function indices improved or stabilized in most patients with fibrotic nonspecific interstitial pneumonia in contrast to the deterioration or stable condition of most patients with idiopathic pulmonary fibrosis. The 5-year survival of patients with fibrotic nonspecific interstitial pneumonia (76.2%) was better than for those with idiopathic pulmonary fibrosis (43.8%) (p = 0.007). Multivariate analysis at the time of presentation revealed that pathologic pattern, age, and diffusion capacity had important prognostic implications. However, after 6 months of follow-up, changes in FVC, initial diffusion capacity, and sex were the only independent prognostic factors, with no additional prognostic information conferred by the histologic diagnosis. Our data confirmed the importance of physiological parameters including short-term change in FVC. However, at the time of diagnosis, histopathology was important for the prediction of prognosis and future change in lung function.</P>
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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.
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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>
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Eupatilin induces Sestrin2-dependent autophagy to prevent oxidative stress
Jegal, K. H.,Ko, H. L.,Park, S. M.,Byun, S. H.,Kang, K. W.,Cho, I. J.,Kim, S. C. Springer Science + Business Media 2016 Apoptosis Vol.21 No.5
<P>Eupatilin (5,7-dihydroxy-3,4,6-trimethoxyflavone) has many pharmacological activities including anti-inflammation, anti-oxidant and anti-cancer effects. Autophagy is the basic cellular machinery involving the digestion of damaged cellular components. In the present study, we investigated the protection effects of eupatilin against arachidonic acid (AA) and iron-induced oxidative stress in HepG2 cells and tried to elucidate the molecular mechanisms responsible. Eupatilin increased cell viability against AA + iron in a concentration-dependent manner and prevented mitochondrial dysfunction and reactive oxygen species (ROS) production. In addition, AA + iron increased the levels of pro-apoptotic proteins and these changes were prevented by eupatilin. Eupatilin also induced autophagy, as evidenced by the accumulation of microtubule-associated protein 1 light chain3-II and the detection of autophagic vacuoles. Furthermore, the protective effects of eupatilin on mitochondrial dysfunction and ROS production were significantly abolished by autophagy inhibitors. Eupatilin also increased the mRNA level of sestrin-2 and its promoter-driven reporter gene activity, which resulted in the up-regulation of sestrin-2 protein. Finally, gene silencing using sestrin-2 siRNA and the ectopic expression of recombinant adenoviral sestrin-2 indicated that sestrin-2 induction by eupatilin was required for autophagy-mediated cytoprotection against AA + iron. Our results suggest that eupatilin activates sestrin-2-dependent autophagy, thereby preventing oxidative stress induced by AA + iron.</P>
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