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컴퓨터 작업 시 의자 등받이 위치가 근육 활성도에 미치는 영향
김민우,변승진,이경은,정소영,조주영,최원자,최찬양,김경 대구대학교 특수교육재활과학연구소 2011 再活科學硏究 Vol.29 No.1
이 연구는 컴퓨터 작업시 의자 등받이 위치가 근육활성도에 미치는 영향을 알아보기 위해 36명의 근골격에 문제가 없는 성인 남녀가 참가하였으며 대상자들은 등받이가 뒤에 있는 의자와 등받이가 없는 의자, 등받이가 앞에 있는 우리들 의자를 무작위로 배정하고 동일한 컴퓨터 작업을 실시하게 하였다. 실험 중, 표면근전도기를 사용하여 의자에 따른 위등세모근, 머리널판근 그리고 척주세움근의 근활성도 변화를 측정하였다. 이 연구의 결과를 종합해보면 등받이가 앞에 있는 의자는 허리 근육의 부담을 줄이지만 목근육에 부담이 늘어나고 등받이가 뒤에 있는 의자와 없는 의자는 허리근육에는 다소 무리가 가지만 목근육에는 부담이 덜하다는 것을 알 수 있었다. 이러한 결과로 환자의 증상에 다라 컴퓨터 작업을 하는 동안 의자 등받이의 위치를 조절하여 치료에 도움이 될 수 있다고 생각되어진다. Objective : In this study, we checked and observed people's change of body muscle and muscle activity who do computer work on different chairs. We set three kind of chairs which one is a stool and another one is the back is fixed, and the other one is the back is fixed in front of chair. Subject : Accounting for 36 health men and women, we divided these people to 3 groups and put them on the three cases(position 1, position 2, position 3). We measured muscle activity of upper trapezius, Splenius Cervics, Erector Spinae from the groups by using surface electromyogram system. Methods : The standard of the electromyogram was 'reference voluntary contraction', and we carried out 'one way anova' to compare muscle activity of three groups. Results : In position 1, reference voluntary contraction of upper trapezius muscle activity was 123.2821%, Splenius Cervics was 141.7526%, and Erector Spinae was 254.5233%. In position 2, reference voluntary contraction of upper trapezius muscle activity was 132.9395%, Splenius Cervics was 141.7526%, and Erector Spinae was 246.6540%. In position 3, reference voluntary contraction of upper trapezius muscle activity was 190.6487%, Splenius Cervics was 270.2332%, and Erector Spinae was 182.1021%. Both upper trapezius and Splenius Cervics muscle activity of position 3 group was higher than the others groups. In position 1 group, Erector Spinae muscle activity was hight than the other groups. And either was position 2 group's(p<0.05). Conclusion : Therefore the chair which is the back is fixed in front is more comfortable for waist muscle but it's not good for neck. And the other chairs are better in waist muscle but not in neck muscle. So far, when we do a computer work, it's prefer to sit on the group 1&2's chairs to reduce neck muscle's stress and sit on group 3's chair to reduce waist muscle's stress.
지방유래 줄기세포가 이식된 Vicryl Mesh의 섬유화와 육아조직 형성에 미치는 영향
허찬영 ( Chan Yeong Heo ),하현정 ( Hyun Jung Ha ),김지회 ( Ji Hoe Kim ),정의철 ( Eui Cheol Jeong ),은석찬 ( Seok Chan Eun ),백롱민 ( Rong Min Baek ),김석화 ( Suk Wha Kim ),민경원 ( Kyung Won Minn ) 한국조직공학·재생의학회 2010 조직공학과 재생의학 Vol.7 No.1
Vicryl mesh consists of polyglactin 910, a synthetic absorbable copolymer made from 90% glycolide and 10% L-lactide. The empirical formula is (C2H2O2)m(C3H4O2)n. The mesh is knitted from uncoated and undyed fiber identical in composition to that used in Vicryl sutures, which has been found to be inert, nonantigenic, nonpyrogenic and to elicit only a mild tissue reaction during absorption. It may be used wherever temporary wound or organ support is required, particularly in instances in which compliant and stretchable support is desired. Successful use is reported for instance as support for the correction of breast deformity. Because a putative potential stem cell population within the adipose tissue has been found to possess therapeutic potentials, we authors sought to determine the effect of adipose tissue-derived stem cells(ADSCs) on Vicryl mesh implantation. Sprague-Dawley rats were divided into two groups one is control, given the surgery of simple Vicryl mesh implantation and the other is stem cell group, given the surgery of mesh implantation and ADSCs(N=12 for each group). Before the surgery ADSCs of stem cell group were isolated from the inguinal fat pads and expanded ex vivo for three passages. Control group received multi-folded Vicryl mesh implantation to the back of the rats and Stem cell group received the surgery of Vicryl mesh implantation and ADSCs. After four weeks of operation, matrix formation, capillary density and collagen production were assessed quantatively under the light microscope. ADSCs led to a statistically significant increase in fibrosis and mature scar formation compared with the control group in histologic examination (p < 0.05). ADSCs was found to be efficacious in promoting fibrosis and scar maturation leading volume replacement on experimental Vicryl mesh implantation. This study might be used as useful volume replacement with Vicryl mesh for correcting breast deformity after conservative surgery.
대동맥주위염과 비후성 경뇌막염으로 발현한 베게너 육아종증의
이은봉 ( Eun Bong Lee ),이은영 ( Eun Young Lee ),이윤종 ( Yun Jong Lee ),김혜원 ( Hye Won Kim ),윤찬영 ( Chan Young Yun ),송영욱 ( Yeong Wook Song ),강은하 ( Eun Ha Kang ),장성혜 ( Sung Hae Chang ) 대한류마티스학회 2010 대한류마티스학회지 Vol.17 No.4
Wegener`s grandulomatosis (WG) is a systemic small-vessel vasculitis characterized by necrotizing granulomatous lesions and anti-neutrophil cytoplasmic antibodies (ANCA). WG frequently affects the upper and lower respiratory tracts and kidney but involvement of the pachymeninges or large vessels has rarely been reported. We report the first case of WG with periaortitis and pachymeningitis in Korea. A 57-year-old female complained of a stabbing headache, paresthesia below the thoracic 4th nerve level, and lower extremity weakness. During her course, she developed otitis media with sensorineural hearing loss, nodular scleritis, and microhematuria. A neuroimaging study showed an intradural mass in the area from the cervical 7th spine to the thoracic 5th spine, left cerebral convexity, and the left petrous area. A chest computed tomography scan revealed an enhanced and thickened aortic arch. A dural biopsy showed necrotizing granulomatous inflammation, and anti-MPO ANCA was positive. Under a diagnosis of WG, she received high-dose glucocorticoid and oral cyclophosphamide with improvement.
허찬영 ( Chan Yeong Heo ),이은혜 ( Eun Hye Lee ),강혜인 ( Hye In Kang ),김인아 ( In Ah Kim ),은석찬 ( Seok Chan Eun ),백롱민 ( Rong Min Baek ),민경원 ( Kyung Won Minn ) 한국조직공학·재생의학회 2009 조직공학과 재생의학 Vol.6 No.4
Radiation-induced skin wound is a unwanted complication of radiation therapy in cancer patients. Because a putative potential stem cell population within the adipose tissue has been found to possess therapeutic potentials, we authors sought to determine the effect of adipose tissue-derived stem cells(ADSCs) on radiationinduce skin wound. Sprague-Dawley rats were divided into two groups. Adipose tissue-derived stem cells were isolated from the inguinal fat pads and expanded ex vivo for three passages. All groups received 25 Gy of gamma irradiation as a single dose to the back of the rats using a cobalt-60 teletherapy unit. After four weeks of radiation, syngeneic ADSCs were delivered into the subcutaneous area of irradiated wounded skin area in experimental group. Acute skin reactions were assessed and at the endpoint of the study. Light microscopic findings were assessed. Clinically and histopathologically, radiation skin reactions were lower than control group(p<0.05). ADSCs was found to be efficacious in preventing epidermal atrophy, dermal degeneration and hair follicle atrophy. In conclusion, ADSCs could be used as useful cell therapeutics to repair and regenerate the wound of irradiation damage.
이한철(Han-Cheol Lee),강주영(Ju-Yeong Kang),박은지(Eun-Ji Park),박민지(Min-Ji Park),오도경(Do-Gyung Oh),김찬영(Chan-Yeong Kim),정은선(Eun-Sun Jeong),김재명(Jai-Moung Kim),안영순(Yeong-Soon Ahn),김중범(Jung-Beom Kim) 한국식품과학회 2021 식품과학과 산업 Vol.54 No.3
Smart HACCP is a system that can check the monitoring of critical control point (CCP) in real time to implement improvement measures immediately after departure from limit criteria and prevent falsification of data by digitizing handwritten records. In this study, we developed the analysis model for the effectiveness of smart HACCP to compare and analyze with existing HACCP. By introducing of smart HACCP system, the evaluation index value of HACCP effectiveness for HACCP-certificated companies on a small scale increased by 9.25 points, corresponding to 11.52% of increase rate. General HACCP-certificated companies showed 4.52 point and 5.00% of increase rate by introducing of smart HACCP system. Thus, it was confirmed that the introduction of smart HACCP system contributes to the improvement of food safety management and especially it would be more effective for HACCP-certificated companies on a small scale than general HACCP-certificated companies.
Implementation of 100CMM Thermal Storage Combustion Oxidizer for VOCs Reduction
Dal-Hwan Yoon,Dal-Hwan Yoon,Beom-Soon Han,Tae-Yeung Lim,Eun-Chan Yang,Yeong-Woong Keon,Hyeon-Woo An,Chan-Ho Kim,Sung-Chan Kang,Min-Ki Jung,Jong-Geun Kim,Hwi-Chan Oh,Chan-Hyouk Jeon,Min-Su Jeon,A-Yeon 제어로봇시스템학회 2022 제어로봇시스템학회 국제학술대회 논문집 Vol.2022 No.11
The heat storage type combustion oxidation device is a system capable of treating VOCs (Volatile Organic Compounds) discharged to the atmosphere at 95% or more. Aromatic hydrocarbons such as benzene are strong carcinogenic substances that cause leukemia, central nervous disorder, and chromosomal abnormalities, and hydrochloride causes destruction of the ozone layer and global warming. This VOCs reduction technology is expected to reduce the number of harmful substances generated for many operating and working conditions. This paper implements a 100CMM Regenerative Thermal Oxidation (RTO) device to reduce air pollution in VOCs generating sites. The carbon-free system is evaluated by measuring the concentration of the VOCs emission gas according to the operating conditions of the production process, analyzing and measuring the THC (Total Hydro-carbons) concentration change. As a result, through the 100CMM RTO experiment, stable RTO driving, renewable energy measurement, and hydrocarbons and nitrogen oxides can be reduced.