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Jung‑Min Oh,Ja‑Geon Koo,Jae‑Won Lim 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6
A new sintering technique for enhancing a densification and hardness of sintered titanium body by supplying hydrogen wasdeveloped (Hydrogen Sintering Process, HSP). The HSP was developed by only injecting hydrogen into an argon atmosphereduring the core time. As a result, sound titanium sintered bodies with high density and hardness were obtained by the HSP. In addition, a pore size and number of the HSP specimens were smaller than those of the argon atmosphere specimen. It wasfound that the injecting hydrogen into the argon atmosphere by HSP can prevent the formation of oxide layers, resulting inenhanced densification and hardness.
Jung‐won Lim 한국사회복지학회 2019 Asian Social Work and Policy Review Vol.13 No.1
Purpose: The current study tests the validity and reliability of the short version of the Health Promoting Lifestyle Profile II (HPLP‐II) when used to measure health promotion for Korean cancer survivors. Methods: The survey data were collected from 175 Korean cancer survivors who were diagnosed with breast or colorectal cancer in South Korea. The confirmatory factor analysis (CFA) and structural equation modeling were conducted to examine the construct and criterion validity of the Korean version of the HPLP‐II. Results: Findings demonstrated that excluding nutrition and stress management, four subscales showed good internal consistency. The three competing models of the HPLP‐II were tested to determine the factor structure of the HPLP‐II for Korean cancer survivors: (a) the original 6‐factor, (b) the modified 4‐factor, and (c) the modified 5‐factor. The five‐factor solution with 23 items was selected for the final model. The criterion‐related validity based on the relationships between health promotion and HRQOL was demonstrated. Discussion: This study makes an important contribution to understanding the health promotion measure used by Korean cancer survivors. Specifically, this study provides a rationale to investigate the validity of a measure before such measures are used in the different language and cultural groups.
Lim Jung‐won 한국사회복지학회 2020 Asian Social Work and Policy Review Vol.14 No.3
Purpose: The current study specified the initial qualitative stage to develop an instrument that assesses whether patients with cancer in Korea are ready for the transition from hospital-based to community-based survivorship care, focusing on psychosocial and behavioral aspects. Methods: Individual interviews with cancer survivors, family members, and healthcare professionals in South Korea were conducted. Subsequently, analyses of qualitative data for creating items and pilot testing were performed to develop an instrument for Korean cancer survivors. Results: An item pool for an initial version of a new instrument called the “Preparedness for Transition to Survivorship Care Instrument (PTSCI)” was developed by creating 20 themes and 41 subthemes around each of the 401 codes. After assessing face validity, a set of 46 items was chosen. The 46 items were organized into 6 components: (1) physical, (2) cognitive, (3) psychological, (4) social, (5) health management, and (6) information. The Cronbach's alpha of the instrument in the pilot testing was 0.872. Discussion: The PTSCI offers an opportunity to identify the psychosocial and behavioral status of patients with cancer in the survivorship phase. This new instrument can be used to test psychosocial and behavioral interventions for individuals who are not ready for the survivorship care phase.
( Jae Won Byun ),( Kyung Hyun Lee ),( Ha Young Kim ),( Soon Seek Yoon ),( Ji Youl Jung1 ),( Woo Seog Jeong1 ),( Jae Ku Oem ),( Jong Soo Lim ),( Myoung Heon Lee ),( You Chan Bae ) 한국예방수의학회(구 한국수의공중보건학회) 2013 예방수의학회지 Vol.37 No.1
Nine cattle among 18 in a native Korean herd died or were euthanized within 3 days. The affected cattle showed cowshed. The pigs and dogs had been fed leftover food originating from nearby restaurants, and the cattle could presumably reach the contaminated food in the pig troughs. Necropsy revealed a few chicken bones and red pepper pieces as well as large amounts of grain and rice straw hay mixed in the rumen. Botulism type D was isolated in the ruminal contents of one of the cattle. We speculated that the outbreak was associated with the cattle incidentally eating presumably contaminated leftover food from the pig trough.
( Won-sang Jung ),( Hyejung Hwang ),( Jisu Kim ),( Hun-young Park ),( Kiwon Lim ) 한국운동영양학회 2019 Physical Activity and Nutrition (Phys Act Nutr) Vol.23 No.2
[Purpose] The purpose of this study was to confirm that the difference in excess post-exercise oxygen consumption (EPOC) during exercise of the spending the same calories between the continuous and interval exercise. [Methods] Thirty-four healthy college students who did not regularly exercise volunteered to participate in our study. Continuous exercise was performed on an ergometer for 30 min at 60% of maximal oxygen consumption (VO<sub>2 max</sub>). Interval exercise was performed on a cycle ergometer at 80% VO<sub>2 max</sub> for 2 min initially, followed by 40% VO<sub>2 max</sub> for 1 min, and 80% VO<sub>2 max</sub> for 3 min. This was repeated six times for a total of 26 min. [Results] The major findings were as follows: (1) energy consumption during exercise was not significantly different between continuous exercise and interval exercise groups; (2) EPOC was higher in interval exercise than in continuous exercise for all dependent variables (i.e., total oxygen consumption, total calories, summation of heart rate); and (3) there were no significant differences in the lipid profile between continuous and interval groups. [Conclusions] Our study confirmed that after equalizing energy expenditure for continuous and interval exercise on a cycle ergometer in subjects in their twenties, interval exercise results in higher EPOC than continuous exercise. These data suggest that interval exercise may be more effective than continuous exercise in reducing body fat, for a given amount of energy expenditure.
Lim Su Jin,Koo Hyun Jung,Cho Min Soo,Nam Gi-Byoung,Kang Joon-Won,Yang Dong Hyun 대한영상의학회 2021 Korean Journal of Radiology Vol.22 No.10
Objective: Arrhythmogenic mitral valve prolapse (MVP) is an important cause of sudden cardiac death characterized by fibrosis of the papillary muscles or left ventricle (LV) wall, and an association between late gadolinium enhancement (LGE) of the LV papillary muscles and ventricular arrhythmia in MVP has been reported. However, LGE of the papillary muscles may be observed in other causes of mitral regurgitation, and it is not limited to patients with MVP. This study was to evaluate the association of LGE of the LV papillary muscles or ventricular wall on cardiac magnetic resonance imaging (CMR) and ventricular arrhythmia in patients with mitral regurgitation. Materials and Methods: This study included 88 patients (mean age ± standard deviation, 58.3 ± 12.0 years; male, 42%) with mitral regurgitation who underwent CMR. They were allocated to the MVP (n = 43) and non-MVP (n = 45) groups, and their LGE images on CMR, clinical characteristics, echocardiographic findings, and presence of arrhythmia were compared. Results: LV myocardial wall enhancement was more frequent in the MVP group than in the non-MVP group (28% vs. 11%, p = 0.046). Papillary muscle enhancement was observed in 7 (7.9%) patients. Of the 43 patients with MVP, 15 (34.8%) showed LGE in the papillary muscles or LV myocardium, including 12 (27.9%) with LV myocardial wall enhancement and 4 (9.3%) with papillary muscle enhancement. One patient with bilateral diffuse papillary muscle enhancement experienced sudden cardiac arrest due to ventricular fibrillation. Univariable logistic regression analysis showed that high systolic blood pressure (BP; odds ratio [OR], 1.05; 95% confidence interval [CI], 1.01–1.09; p = 0.027) and ventricular arrhythmia (OR, 6.84; 95% CI, 1.29–36.19; p = 0.024) were significantly associated with LGE of the papillary muscles. Conclusion: LGE of the papillary muscles was present not only in patients with MVP, but also in patients with other etiologies of mitral regurgitation, and it was associated with high systolic BP and ventricular arrhythmia. Papillary muscle enhancement on CMR should not be overlooked.
( Won Yeong Bang ),( Dong Hyun Kim ),( Mi Dan Kang ),( Jungwoo Yang ),( Taelin Huh ),( Young Woon Lim ),( Young Hoon Jung ) 한국미생물 · 생명공학회 2021 Journal of microbiology and biotechnology Vol.31 No.10
Bacterial nanocellulose (BNC) is a biocompatible material with a lot of potential. To make BNC commercially feasible, improvements in its production and surface qualities must be made. Here, we investigated the in situ fermentation and generation of BNC by addition of different cellulosic substrates such as Avicel and carboxymethylcellulose (CMC) and using Komagataeibacter sp. SFCB22-18. The addition of cellulosic substrates improved BNC production by a maximum of about 5 times and slightly modified its structural properties. The morphological and structural properties of BNC were investigated by using Fourier transform-infrared spectroscopy (FT-IR), scanning electron microscopy and X-ray diffraction. Furthermore, a type-A cellulose-binding protein derived from Clostridium thermocellum, CtCBD3, was used in a novel biological analytic approach to measure the surface crystallinity of the BNC. Because Avicel and CMC may adhere to microfibrils during BNC synthesis or crystallization, cellulose-binding protein could be a useful tool for identifying the crystalline properties of BNC with high sensitivity.
( Won-sang Jung ),( Hyejung Hwang ),( Jisu Kim ),( Hun-young Park ),( Kiwon Lim ) 한국운동영양학회 2019 Physical Activity and Nutrition (Phys Act Nutr) Vol.23 No.2
[Purpose] The purpose of this study was to compare the excess post-exercise oxygen consumption (EPOC) between different types of exercises in women with normal weight obesity (NWO). [Methods] Nine university students with NWO having body mass index < 25 kg/m<sup>2</sup> and body fat percentage >30% participated in the study. First, continuous exercise (CEx) on an ergometer for 30 minutes at 60% of maximal oxygen consumption (VO<sub>2max</sub>) and interval exercise (IEx) at 80% VO<sub>2max</sub> for 2 minutes were performed. This was followed by exercise performed at 40% VO<sub>2max</sub> for 1 minute and at 80% VO<sub>2max</sub> for 3 minutes, performed 6 times repeatedly for a total of 26 minutes. The accumulation of short duration exercise (AEx) was performed for 3-bouts of 10 minutes each at 60% VO<sub>2max</sub>. [Results] The major findings were as follows: energy consumption during the exercises showed no significant difference between CEx, IEx, and AEx; EPOC was higher in IEx and AEx as compared to CEx for all dependent variables (e.g. total oxygen consumption, total calorie, summation of heart rate, and EPOC duration); and the lipid profile showed no significant difference. [Conclusions] Our study confirmed that when homogenizing the energy expenditure for various exercises in NWO individuals, EPOC was higher in IEx and AEx than in CEx. Therefore, IEx and AEx can be considered as effective exercise methods for increasing energy expenditure in NWO females.