Arthroscopic Treatment of Elbow Osteoarthritis and Arthroscopic Ulnar Nerve Decompression

Seok Won Chung 대한견주관절의학회 2016 대한견주관절의학회지 Vol.19 No.4

Although arthroscopic surgery has been used conventionally, it has not been widely adopted yet due to the risks of complications, including nerve damage, technical difficulties, and limited indications. As shown in other joints, however, the use of an arthroscope will gradually increased in the elbow joint (‘Arthroscopy always wins’). Herein, arthroscopic treatments and arthroscopic ulnar nerve decompression will be discussed in cases of elbow osteoarthritis.

Superconducting MgB2 Wire Drawing Considering Anisotropic Hardening Behavior and Hydrostatic Effect

Young‑Seok Oh,Ho Won Lee,Kook‑Chae Chung,Duck‑Young Hwang,Seong‑Hoon Kang,Jeong Whan Yoon 대한금속·재료학회 2022 METALS AND MATERIALS International Vol.28 No.7

Numerical modeling was conducted to investigate the deformation behavior of powder mixture during multi-pass drawingprocesses for multi-filamentary MgB2wire. A modified Drucker-Prager Cap (DPC) model with an elliptical cap surface usingthe new material characterization method was developed to capture the anisotropic hardening behavior and hydrostatic effectof the powder mixture. A number of uniaxial die compaction, cold isostatic pressing, diametrical compression, and uniaxialcompression tests were conducted using different powder densities to characterize the modified DPC model. A commercialfinite element software ABAQUS with a user subroutine was used to simulate the drawing of the MgB2wire. The densityand area fraction of the powder mixture during the wire-drawing process were verified with experimental results. The differencein packing density at the inner and outer filaments of the MgB2wire was successfully captured by simulation. Inaddition, the effect of the initial packing density on the superconducting properties of MgB2wire was numerically studied. It is shown that the increase in the superconducting area, which results from a high initial packing density, should be moreeffective compared to the increase in the grain connectivity in enhancing the critical current properties for the MgB2wirewhen the final packing density is saturated after a number of drawing processes.

Cystic Medullary Thyroid Carcinoma: A Case of Undergoing Endoscopic Thyroid Lobectomy

Dong Hae Chung,Jae Yeon Seok,Yoo Seung Chung1,Eun Mee Oh1,Jung Won Ryu1,Young Don Lee1 대한갑상선-내분비외과학회 2015 The Koreran journal of Endocrine Surgery Vol.15 No.1

On ultrasonography, medullary thyroid carcinoma (MTC) shows hypoechogenicity, an irregular margin, a predominantly solid composition, and microcalcifications, similar to those observed in papillary thyroid carcinoma (PTC). MTC presenting as a cystic lesion is rare, and endoscopic thyroidectomy can be performed for benign thyroid masses and early stage PTC, however it is inappropriate for MTC regardless of cystic change. The authors report a case of cystic MTC found after endoscopic thyroid lobectomy and provide a review of the literature on this topic.

산업장 근로자의 스트레스에 대한 한의계 연구경향

차윤엽 ( Yun Yeop Cha ),고연석 ( Youn Seok Ko ),이정한 ( Jung Han Lee ),정원석 ( Won Suk Chung ),신병철 ( Byung Cheul Shin ),전찬용 ( Chan Yong Jeon ),고호연 ( Ho Yeon Go ),선승호 ( Seong Ho Sun ),장보형 ( Bo Hyoung Jang ),송윤경 한방재활의학과학회 2013 한방재활의학과학회지 Vol.23 No.2

Objectives : The purpose of this study is to explore the trends of Korean medical study on stress in the industrial worker. Methods : We received numbers of the studies about stress in the industrial worker from 6 Korean web databases, using key words such as ‘Industry AND Stress’, ‘Oriental medicine AND Stress’, ‘Worker AND Stress’, ‘Workplace AND Stress’. We received 12 research papers and they were analyzed and the journals, the authors, the contents of 3 classification of those research papers. Results : Among them, we had 6 reviews of Dept. of preventive medicine and Dept. of third medicine, college of Korean Medicine, Won-kwang University, and the rest of them were 6 reviews. We had 4 reviews of Korean Journal of Oriental Preventive Medical Society, 2 reviews of the Journal of Traditional Korean Medicine, 2 reviews of Journal of Oriental Neuropsychiatry and so on. According to the contents of reviews, we had 7 reviews of correlation of industrial worker and stress, 4 reviews of cause on the industrial worker’s stress and 1 case report. Conclusions : We reviewed the trends of Korean medical study on stress in the industrial worker. The stress in the industrial workers were related with the type of occupation, social psychology, drinking, smoking, the satisfaction of job, the harmony of organization.And we knew that the musculoskeletal pain was related to the industrial worker’s stress. In the future, abundant case studies, follow-up trials and RCTs should be done about the industrial worker’s stress.

우황청심원 관련 최근 연구 동향 : 국내 논문에 대한 고찰

이제원,백경민,백영두,임은영,장우석,전우현,정인권,Lee, Je-Won,Baek, Kyung-Min,Baek, Young-Doo,Im, Eun-Young,Chang, Woo-Seok,Cheon, Woo-Hyun,Chung, In-Kwon 대한한방내과학회 2010 大韓韓方內科學會誌 Vol.31 No.4

Objectives : Woohwangchungsim-won has been used for acute diseases such as cerebrovascular disease (stroke), heart disease. The aim of this study was to determine the effects, significance & necessity of Woohwangchungsim-won in acute stages of these disease by reviewing Korean articles about Woohwangchungsim-won. Methods : Article searches were performed on 8 major Korean web article search engine from January 1980 to August 2010. There were no restrictions on the types of publication, including grey articles. Results : Forty-three articles were included. Twenty one were efficacy tests, thirteen were comparative efficacy tests, eight were toxicity tests, and one was new method development. Eighteen articles were multicenter studies and twenty five were single center studies. Thirty two articles were animal testing, only ten articles were clinical articles. Thirty seven articles presented the composition and quantity of Woohwangchungsim-won, but six did not. Conclusions : The results of Korean articles about Woohwangchungsim-won can not strongly support the effects, significance & necessity of Woohwangchungsim-won. More rigorous studies are required for determination of the effects of Woohwangchungsim-won.

Clinical impacts of hazardous alcohol use and obesity on the outcome of entecavir therapy in treatment-naïve patients with chronic hepatitis B infection

Won Gil Chung,Hong Joo Kim,Young Gil Choe,Hyo Sun Seok,Chang Wook Chon,Yong Kyun Cho,Byung Ik Kim,Young Yool Koh 대한간학회 2012 Clinical and Molecular Hepatology(대한간학회지) Vol.18 No.2

Background/Aims: The aim of this study was to analyze the clinical impacts of obesity and hazardous alcohol use on the outcome of entecavir (ETV) therapy in chronic hepatitis B (CHB) patients. Methods: The medical records of 88 treatment-naïve patients who were diagnosed with CHB and received ETV between March 2007 and September 2009 were analyzed retrospectively. Body mass index (BMI) values and Alcohol Use Disorders Identifi cation Test (AUDIT) scores were obtained at 6 months after the initiation of ETV (0.5 mg daily) treatment. Results: A BMI of 25 kg/m2 or more was recognized as an indicator of obesity, and a total AUDIT score of 8 or more was recognized as an indicator of hazardous alcohol use. Of the cohort, 24 patients (27.3%) were obese and 17 (19.3%) were hazardous alcohol users. The rate of seroconversion, alanine aminotransferase (ALT) normalization, and hepatitis B virus (HBV)-DNA negativity (<300 copies/mL) at 3, 6, and 12 months of treatment did not differ significantly between the normal-BMI and high-BMI groups. Moreover, the rate of seroconversion and HBV-DNA negativity at 3, 6, and 12 months of treatment did not diff er signifi cantly between the nonhazardous and hazardous alcohol users. However, the frequency of ALT normalization at 12 months was signifi cantly lower among hazardous alcohol users (91.5% vs. 70.6%; P =0.033). Conclusions: Obesity and hazardous alcohol drinking have no significant impact on the outcome of ETV treatment. However, the ALT normalization rate at 12 months after initiation of ETV treatment was signifi cantly lower among the hazardous alcohol users. (Clin Mol Hepatol 2012;18:195-202) Background/Aims: The aim of this study was to analyze the clinical impacts of obesity and hazardous alcohol use on the outcome of entecavir (ETV) therapy in chronic hepatitis B (CHB) patients. Methods: The medical records of 88 treatment-naïve patients who were diagnosed with CHB and received ETV between March 2007 and September 2009 were analyzed retrospectively. Body mass index (BMI) values and Alcohol Use Disorders Identifi cation Test (AUDIT) scores were obtained at 6 months after the initiation of ETV (0.5 mg daily) treatment. Results: A BMI of 25 kg/m2 or more was recognized as an indicator of obesity, and a total AUDIT score of 8 or more was recognized as an indicator of hazardous alcohol use. Of the cohort, 24 patients (27.3%) were obese and 17 (19.3%) were hazardous alcohol users. The rate of seroconversion, alanine aminotransferase (ALT) normalization, and hepatitis B virus (HBV)-DNA negativity (<300 copies/mL) at 3, 6, and 12 months of treatment did not differ significantly between the normal-BMI and high-BMI groups. Moreover, the rate of seroconversion and HBV-DNA negativity at 3, 6, and 12 months of treatment did not diff er signifi cantly between the nonhazardous and hazardous alcohol users. However, the frequency of ALT normalization at 12 months was signifi cantly lower among hazardous alcohol users (91.5% vs. 70.6%; P =0.033). Conclusions: Obesity and hazardous alcohol drinking have no significant impact on the outcome of ETV treatment. However, the ALT normalization rate at 12 months after initiation of ETV treatment was signifi cantly lower among the hazardous alcohol users. (Clin Mol Hepatol 2012;18:195-202)

Topomer-CoMFA Study of Tricyclic Azepine Derivatives-EGFR Inhibitors

Chung, Jae-Yoon,Pasha, F.A.,Chung, Hwan-Won,Yang, Beom-Seok,Lee, Cheol-Ju,Oh, Jung-Soo,Moon, Myoung-Woon,Cho, Seung-Joo,Cho, Art E. The Korean Society of Toxicogenomics and Toxicopro 2008 Molecular & cellular toxicology Vol.4 No.1

EGFR has been intensively investigated as a target to block the signal transduction pathway which stimulates cancer growth and metastasis. Studies about structure-activity relationship for tricyclic azepine derivatives were performed with topomer-CoMFA. The derived topomer-CoMFA model with steric and electrostatic field parameters based on fragment units gave reasonable statistics ($q^2$=0.561, $r^2$=0.679). The model explains why a halogen atom at the meta position of aniline is important to increases inhibitory activity. This comes from an electrostatically negative groups are favored near this region. The model also shows that there are sterically favored regions around methoxy group extended from oxazepine derivatives. The findings about steric and electrostatic effects can be utilized for designing new inhibitors.

Design of an RF Low-Noise Bandpass Filter Using Active Device Reduction Technique

Chung, Moon-Seok,Kim, Il-Soo,Yun, Sang-Won THE INSTITUTE OF ELECTRICAL ENGINEERS 2007 IEEE Microwave and Wireless Components Letters Vol. No.

<P>This letter presents a new design for the radio frequency low-noise bandpass filter (BPF) using the active device reduction technique. In a conventional active BPF based on the negative resistance method, the number of active devices depends on the order of the BPF. In the proposed design, the number of active devices is reduced in half, using the suggested new technique. Compared with the conventional active BPF, the proposed one shows better noise figure and consumes less power. We apply this technique to the design of the second order BPF and verify that the measured results exhibit good active filter performances</P>

Outcomes of living donor kidney transplantation in diabetic patients: age and sex matched compar-ison with non-diabetic patients

( Chung Hee Baek ),( Hyosang Kim ),( Seung Don Baek ),( Mun Jang ),( Wonhak Kim ),( Won Seok Yang ),( Duck Jong Han ),( Su-kil Park ) 대한내과학회 2018 The Korean Journal of Internal Medicine Vol.33 No.2

Background/Aims: Kidney transplantation (KT) reportedly provides a significant survival advantage over dialysis in diabetic patients. However, KT outcome in diabetic patients compared with that in non-diabetic patients remains controversial. In addition, owing to recent improvements in the outcomes of KT and management of cardiovascular diseases, it is necessary to analyze outcomes of recently performed KT in diabetic patients. Methods: We reviewed all diabetic patients who received living donor KT between January 2008 and December 2011. Each patient was age- and sex-matched with two non-diabetic patients who received living donor KT during the same period. The outcomes of living donor KT were compared between diabetic and non-diabetic patients. Results: Among 887 patients, 89 diabetic patients were compared with 178 non-diabetic patients. The incidence of acute rejection was not different between the diabetic and non-diabetic patients. Urinary tract infection and other infections as well as cardiovascular events occurred more frequently in diabetic patients. However, diabetes, cardiovascular disease, and infection were not significant risk factors of graft failure. Late rejection (acute rejection after 1 year of transplantation) was the most important risk factor for graft failure after adjusting for diabetes mellitus (DM), human leukocyte antigen mismatch, rejection and infection (hazard ratio, 56.082; 95% confidence interval, 7.169 to 438.702; p < 0.001). Mortality was not significantly different between diabetic and non-diabetic patients (0 vs. 2, p = 0.344 by log-rank test). Conclusions: End-stage renal disease patients with DM had favorable outcomes with living donor kidney transplantation.

Poly(Vinyl Alcohol)/BaSO₄ Hybrid Fibers with Radiopaque Properties

Chung, Yong Sik,Kim, Wan Jin,Pak, Pyong Ki,Lyoo, Won Seok,Lee, Se Chul,Kang, Sung Gwon Trans Tech Publications, Ltd. 2007 Key Engineering Materials Vol.342 No.-