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이진향(Jin Hyang Lee),박기수(Ki-Soo Park),전혜지(Hye Ji Jeon),양현수(Hyun Su Yang),김보경(Bokyoung Kim),최마이클승필(Michael Sung Pil Choe) 한국농촌의학 지역보건학회 2013 농촌의학·지역보건 Vol.38 No.4
Objectives: This study was performed to investigate the relationship between individual-level social capital and depression. And, we assessed if depressive symptom mediates the relationship between social capital and self-rated health status. Methods: Data from the 2011 Community Health Survey were analyzed for this study. We used chi-square tests and analyzed a four step approach in which several regression analyses were conducted and significance of the coefficients was examined at each step. Results: In men, the results of controlling mediating factor (depression): social participation was not significantly associated with self-rated health status(p=0.082), the finding supports that social participation was fully mediated by depression. In women, the relationship between social capital(trust, social participation) and self-rated health status was partially mediated by depression. Conclusions: In order to increase self rated health status, not only improvement in trust and social participation are needed but effort to reduce depression must be combined.
경남 지역 농업인의 상지 근골격계 질환 유병률과 위험인자
서영선 ( Young Sun Suh ),천윤홍 ( Yun Hong Cheon ),김현옥 ( Hyun Ok Kim ),김록범 ( Rock Bum Kim ),박기수 ( Ki Soo Park ),양현수 ( Hyun Su Yang ),박형빈 ( Hyung Bin Park ),나재범 ( Jae Bum Na ),윤철호 ( Chul Ho Yoon ),이상일 ( Sang 대한류마티스학회 2015 대한류마티스학회지 Vol.22 No.6
Objective. To evaluate the prevalence and risk factors of upper extremity musculoskeletal diseases (MSDs) among Korean farmers. Methods. The study was carried out from June 2013 to August 2015 on 850 farmers and 203 non-farmers (controls) in Gyeongnam Province. Physical examinations were performed by rheumatologists, orthopedists, and rehabilitation specialists. Plain radiography, a nerve conduction examination, and magnetic resonance imaging were performed, and the Disabilities of the Arm, Shoulder, and Hand (DASH) questionnaire was used to assess upper extremity function. Results. Thirty-four different types of upper extremity MSDs were detected in the 1,053 study subjects. The prevalence of any MSD in farmers was 8.96-fold higher than in control (p<0.001). The most obvious difference in prevalence between farmers and non-farmers was hand osteoarthritis (48.2% vs. 4.9%). Mean total DASH score was higher for farmers than non-farmers (14.29±13.66 vs. 10.03±10.85, p<0.001). Among farmers, myofascial pain syndrome, rotator cuff tear, and epicondylitis were more prevalent among overhead workers (growing persimmons, pears, and grapes) than in non-overhead workers (growing rice and upland crops). The following factors were associated with a rotator cuff tear; older age, overhead work, high waist circumference, and lower level of education. Hand osteoarthritis was found to be associated with older age, a female gender, high waist circumference, and longer total work time. Conclusion. The prevalence of upper extremity MSDs is much higher in farmers than non-farmers and greater still for farmers doing overhead work. Various factors contribute to the occurrence of upper extremity MSDs, and thus, the authors suggest an efficient preventive strategy, which involves consideration of type of work and risk factors, be established for farmers to reduce upper extremity MSDs. (J Rheum Dis 2015;22:366-373)
용해성 poly(dimethy-co-diphenylsilane)공중합체의 특성과 열분해에 관한 연구
강필현,양현수,황택성,김봉만,권오현 忠南大學校 産業技術硏究所 1993 산업기술연구논문집 Vol.8 No.2
Soluble poly(dimethyl-co-diphenylsilane)copolymer,[(SiMe₂)x(SiPh₂)1-x]n where x=0.5 to 0.9., was synthesized by condensation polymerization of dimethyldichlorosilane and diphenyldichlorosilane in xylene. In the TG analysis of the copolymer, weight loss started at 170℃ and the weight residue at 1000℃ was 32%. The copolymer was stabilized by thermal oxidation at 80 to 110℃ for 5 hr. in air, and its thermal stability increased as the temperature increased. The copolymer heat treated above 700℃ showed no organic bonds of C-H and Si-CH₃. while Si-C, and Si-O large bonds were observed. Amorphous SiC was obtained by pyrolysis at 1000℃ and β-SiC at 1200 to 1400℃, in which a better crystallinity of β-SiC was observed at a higher temperature.
캡슐화된 잠열 미립자 슬러리를 열 매체로 하는 축열식 냉방시스템
최준규,이재구,양현수,주태운,김필수 한국공업화학회 2003 응용화학 Vol.7 No.1
Microcapsules containing tetradecane as the phase change material (PCM) and ashell of meolamine-formalin resin were prepared by in situ polymerization. Tooptimize the encapsulation process, experiments were performed under various reaction conditions. Microcapsules with a high uniformity could be prepared, and the ratio of breakage of the microcapsules was less than 6% over 10,000 cycles using by a circulation pump. The cooling system, which has adopted MPCM slurry as a media for transporting cold thermal energy, is designed to investigate the performance of newly developed coolant. The discharging times of cold energy in circulating 20 wt% MPCM slurry are lasted to 260 minutes as long as the sensible cooling system. According, it was demonstrated that the microcapsules prepared in the current research are suitable for potential application as hat transporting media.