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166 results on '"Shin, Beomsu"'

3. Comparison of the end-of-life decisions of patients with hospital-acquired pneumonia after the enforcement of the life-sustaining treatment decision act in Korea

Author

Baek, Ae-Rin, Hong, Sang-Bum, Bae, Soohyun, Park, Hye Kyeong, Kim, Changhwan, Lee, Hyun-Kyung, Cho, Woo Hyun, Kim, Jin Hyoung, Chang, Youjin, Lee, Heung Bum, Gil, Hyun-Il, Shin, Beomsu, Yoo, Kwang Ha, Moon, Jae Young, Oh, Jee Youn, Min, Kyung Hoon, Jeon, Kyeongman, and Baek, Moon Seong

Published
2023
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10. Electrical conductivity and electromagnetic interference shielding effectiveness of nano-structured carbon assisted poly(methyl methacrylate) nanocomposites

Author

Mondal, Subhadip, Ravindren, Revathy, Shin, Beomsu, Kim, Suhyun, Lee, Hyunsang, Ganguly, Sayan, Das, Narayan Ch., and Nah, Changwoon

Subjects
Polymethylmethacrylate -- Structure -- Magnetic properties -- Electric properties, Electrical conductivity -- Analysis, Polymeric composites -- Structure -- Electric properties -- Magnetic properties, Electromagnetic interference -- Analysis, Engineering and manufacturing industries, Science and technology
Abstract

Nanostructured carbon-based polymeric nanocomposites are gaining research interest because of their cost-effectiveness, lightweight, and robust electromagnetic interference (EMI) shielding performance. Till now, it is a great challenge to design and fabricate highly scalable, cost-effective nanocomposites with superior EMI shielding performance. Herein, highly scalable EMI shielding material with tunable absorbing behaviors comprising of low-budget ketjen black (K-CB) reinforced poly(methyl methacrylate) (PMMA) nanocomposites have been prepared using simple solvent assisted solution mixing technique followed by hot compression technique. The morphological investigation revealed the homogeneous distribution of K-CB and strong interfacial interaction in PMMA matrix, which validated the strong reinforcement and other intriguing properties of the nanocomposites. The PMMA nanocomposites showed a low percolation threshold (2.79 wt%) and excellent electrical conductivity due to the formation of 3D conductive network like architecture within the polymer matrix. Specifically, the 10 wt% K-CB nanocomposite possessed a superior EMI shielding performance of about 28 dB for X-band frequency range. Further, a huge change in EMI shielding performance of PMMA nanocomposites is observed with varying thickness. The brand new K-CB decorated PMMA nanocomposites are expected to open the door for next-generation costeffective EMI shielding materials for academic and industrial applications. KEYWORDS carbon black, electrical conductivity, electromagnetic interference shielding, flexural properties, low percolation threshold, 1 | INTRODUCTION With huge development and popularization of electronic and electrical devices, humankind binds with increasingly electromagnetic (EM) radiation pollution. [1,2] As per the present scenario, it has the [...]

Published
2020
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18. New prognostic scoring system for mortality in idiopathic pulmonary fibrosis by modifying the gender, age, and physiology model with desaturation during the six-minute walk test

Author

Lee, Jae Ha, primary, Jang, Ji Hoon, additional, Jang, Hang-Jea, additional, Kim, Song Yee, additional, Chung, Man Pyo, additional, Yoo, Hongseok, additional, Jeong, Sung Hwan, additional, Song, Jin Woo, additional, Lee, Hong Lyeol, additional, Choi, Sun Mi, additional, Kim, Young Whan, additional, Kim, Yong Hyun, additional, Park, Sung Woo, additional, Park, Jong Sun, additional, Jegal, Yangin, additional, Lee, Jongmin, additional, Uh, Soo-Taek, additional, Kim, Tae-Hyung, additional, Kim, Yee Hyung, additional, Shin, Beomsu, additional, Lee, Hyun-kyung, additional, Yang, Sei-Hoon, additional, Lee, Hyun, additional, Kim, Sang-Heon, additional, Lee, Eun-Joo, additional, Choi, Hye Sook, additional, Kang, Hyung Koo, additional, Heo, Eun Young, additional, Lee, Won-Yeon, additional, and Park, Moo Suk, additional

Published
2023
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24. Chronic cavitary pulmonary aspergillosis: Serial clinical and CT findings correlated with antifungal treatment and patient response.

Author

Nam, Yoojin, Moon, Seong Mi, Shin, Beomsu, Ko, Nak Gyeong, An, Junho, Wi, Yu Mi, and Lee, Kyung Soo

Subjects
PULMONARY aspergillosis, COMPUTED tomography, ANTIFUNGAL agents, NEUTROPHIL lymphocyte ratio, SERUM albumin, UNIVARIATE analysis
Abstract

Background: Chronic cavitary pulmonary aspergillosis (CCPA) is the most common form of chronic pulmonary aspergillosis. Objective: We hypothesise that by observing serial clinical and CT findings of CCPA patients with antifungal therapy, factors helping predict responses to antifungal therapy could be withdrawn. Methods: A total of 31 patients with CCPA who received antifungal therapy for greater than six months and who had serial CT studies were included. Clinical finding analyses were performed at initial and last follow‐up CT acquisition dates. Clinical characteristics and CT features were compared between clinically improving or stable and deteriorating groups. Results: With antifungal therapy, neutrophil‐to‐lymphocyte ratio (2.66 vs. 5.12, p =.038) and serum albumin (4.40 vs. 3.85 g/dl, p =.013) and CRP (1.10 vs. 42.80 mg/L, p =.007) were different between two groups. With antifungal therapy, meaningful CT change, regardless of clinical response grouping, was decrease in cavity wall thickness (from 13.70 mm to 8.28 mm, p <.001). But baseline (p =.668) and follow‐up (p =.278) cavity wall thickness was not different between two groups. In univariate analysis, initial maximum diameter of cavity (p =.028; HR [0.983], 95% CI [0.967–0.998]) and concurrent NTM infection (p =.030; HR [0.20], 95% CI [0.05–0.86]) were related factors for poor clinical response. Conclusions: With antifungal therapy, cavities demonstrate wall thinning. Of all clinical and radiological findings and their changes, initial large cavity size and concurrent presence of NTM infection are related factors to poor response to antifungal therapy. [ABSTRACT FROM AUTHOR]

Published
2023
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47. Effects of long-term bronchodilators in bronchiectasis patients with airflow limitation based on bronchodilator response at baseline

Author

Jeong,Ho Jung, Lee,Hyun, Carriere,Keumhee C, Kim,Jung Hoon, Han,Jin-Hyung, Shin,Beomsu, Jeong,Byeong-Ho, Koh,Won-Jung, Kwon,O Jung, Park,Hye Yun, Jeong,Ho Jung, Lee,Hyun, Carriere,Keumhee C, Kim,Jung Hoon, Han,Jin-Hyung, Shin,Beomsu, Jeong,Byeong-Ho, Koh,Won-Jung, Kwon,O Jung, and Park,Hye Yun

Abstract

Ho Jung Jeong,1,* Hyun Lee,1,* Keumhee C Carriere,2,3 Jung Hoon Kim,1 Jin-Hyung Han,1 Beomsu Shin,1 Byeong-Ho Jeong,1 Won-Jung Koh,1 O Jung Kwon,1 Hye Yun Park1 1Division of Pulmonary and Critical Care Medicine, Department of Medicine, Samsung Medical Center, Sungkyunkwan University of Medicine, Seoul, South Korea; 2Department of Mathematical and Statistical Sciences, University of Alberta, Edmonton, AB, Canada; 3Biostatistics and Clinical Epidemiology Center, Samsung Medical Center, Seoul, South Korea *These authors contributed equally to this work Purpose: The association between positive bronchodilator response (BDR) at baseline and the effect of long-term bronchodilator therapy has not been well elucidated in patients with bronchiectasis. The aims of our study were to explore the association between positive BDR at baseline and lung-function improvement following long-term (3–12 months) bronchodilator therapy in bronchiectasis patients with airflow limitation. Materials and methods: The medical records of 166 patients with clinically stable bronchiectasis who underwent baseline pre- and postbronchodilator spirometry and repeated spirometry after 3–12 months of bronchodilator therapy were retrospectively reviewed. For analysis, patients were divided into two groups, responders and poor responders, based on achievement of at least 12% and 200 mL in forced expiratory volume in 1 second (FEV1) following bronchodilator therapy from baseline FEV1. Results: A total of 57 patients (34.3%) were responders. These patients were more likely to have positive BDR at baseline than poor responders (38.6% [22 of 57] vs 18.3% [20 of 109], P=0.004). This association persisted after adjustment for other confounding factors (adjusted odds ratio 2.298, P=0.034). However, we found FEV1 improved significantly following long-term bronchodilator therapy, even in patients without positive BDR at baseline (change in FEV1 130 mL, interquartile range -10 to 250 m

Published
2016

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