• Journal of Convergence for Information Technology
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• v.11 no.7
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• pp.164-171
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• 2021

This study analyzed the post-exercise cardiopulmonary function, maximal oxygen uptake, heart rate and recovery time through smoker's short - term smoking cessation and trunk stabilization exercise for 72 hours. We analyzed the effect of trunk stabilization exercise on the cardiopulmonary function of smokers and non-smokers. As a result, it was found that both smokers and non-smokers groups showed significant changes in pulmonary function (FVC, SVV, MVV), maximal oxygen uptake, recovery time Difference. This suggests that the trunk stabilization exercise may have a positive effect on the cardiopulmonary function of short-term non-smokers as well as non-smokers for a short period of time, and a more stable and effective method for preventing and improving the reduction of cardiorespiratory function

• Tuberculosis and Respiratory Diseases
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• v.57 no.1
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• pp.37-46
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• 2004

Background : Lung pericytes are important constituent cells of blood-air barrier in pulmonary microvasculature. These cells take part in the control of vascular contractility and permeability. In this study, it was hypothesized that change of lung pericytes might be attributable to pathologic change in microvasculature in acute lung injury. The purpose of this study was how hypoxia change proliferation and genetic expression in lung pericytes. Methods : From the lungs of several Sprague-Dawley rats, performed the primary culture of lung pericytes and subculture. Characteristics of lung pericytes were confirmed with stellate shape in light microscopy and immunocytochemistry. 2% concentration of oxygen and $200{\mu}M$ $CoCl_2$ were treated to cells. Tryphan blue method and reverse transcription-polymerase chain reaction were done. Results : 1. We established methodology for primary culture of lung pericytes. 2. Hypoxia inhibited cellular proliferation in pericytes. 3. Hypoxia could markedly induce vascular endothelial growth factor(VEGF) and smad-2. 4. Hypoxia-inducible factor-$1{\alpha}$(HIF-$1{\alpha}$) was also induced by 2% oxygen. Conclusion : Viability of lung pericytes are inhibited by hypoxia. Hypoxia can stimulate expression of hypoxia-responsive genes. Pericytic change may be contributed to dysfunction of alveolar-capillary barrier in various pulmonary disorders.

• Progress in Medical Physics
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• v.2 no.2
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• pp.175-182
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• 1991

A newly derived O$_2$ Saturation Model which can be adapted to the design and study of Artificial Lung and Blood Gas Calculator etc. is introduced on the basis of Electrical Equivalent Circuits. The presented 4 stage and 2 stage RC circuits have good correlatons with actual chemical reactions of Hemoglobin and Oxygen. However, from results of computer simulations, 2 stage equivalent model is more accurate than 4 stage and conventional O$_2$ saturation models.

• Journal of Environmental Impact Assessment
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• v.12 no.3
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• pp.121-135
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• 2003

1999년 7월 청주권을 비롯한 7개 지방중소도시권은 친환경적 도시기본계획을 수립한 후 개발제한구역을 해제하도록 하고, 수도권을 비롯한 7개 대도시권은 보전가치가 낮은 지역을 위주로 부분적으로 해제하도록 하였다. 그리하여 표고, 경사도, 농업적성도, 식물상, 임업적성도, 수질 등 6개 항목에 대한 환경평가를 통해 개발제한구역에 용도지역이 지정되었다. 청주시의 경우 환경평가와 주민의견 반영 후 도시계획재정비에 따라 용도지역이 지정되었으나, 평지나 산림생산성이 떨어지는 곳은 낮은 환경등급을 받아 개발이 가능한 용도지역이 지정됨으로써 벨트형 녹지 유지가 어려워져, 시가지 팽창, 대전과 연담화, 도시 허파기능 상실 등의 가능성이 커지게 되었다. 따라서 청주권 개발제한구역의 시가화 영향을 토지피복, 지목, 용도지역 등의 변화를 통해 살펴보고, 6개 항목에 대한 환경평가 과정상 문제점을 고찰한 후, 개발제한구역의 해제 영향을 도시성장측면과 환경용량평가를 통해 규명하고, 전략환경평가의 적용방안을 모색하고자 한다. 전략환경평가의 시행을 위해서는 먼저 오염총량관리제, 국토의 계획 및 이용에 관한 법률에 의한 개발밀도관리구역, 수도권정비계획법에 의한 인구집중시설에 대한 개발총량규제 등이 반영되어야 할 것이다. 그리고 이미 시행중인 개발사업 및 개발계획중인 사업에 대한 누적영향평가와 함께 해당 지역에 대한 환경용량평가가 이뤄져야 하고, 아울러 개발제한구역 해제지역에 대한 사전환경성검토업무편람의 내용을 토대로 하여 환경평가항목에 대한 스코우핑, 환경평가 지표 개발이 이뤄져야 할 것이다.

• The Journal of the Convergence on Culture Technology
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• v.7 no.4
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• pp.203-210
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• 2021

This study examined the effect of the respiratory training centered at forced breathing exercise of blowing out a candle on the improvement of adults' respiratory ability, which means the increased muscle strength of body trunk. After the four-week candle-blowing breathing training, the forced vital capacity (FVC) increased statistically significantly (p<.05). The forced expiratory volume in one second (FEV1) did not show a statistically significant difference before and after the four-week intervention(p>.05). The peak expiratory flow rate (PEF) statistically significantly increased after the four-week blowing-out-the-candle training (p<.05). This study examined the relationship between forced breathing training and pulmonary function of healthy adults including FVC, FEV1, and PEF, which means the increased muscle strength of body trunk, by implementing blowing-out-the-candle breathing exercise centered at forced respiratory exercise and obtained significant results. Further studies that use a sample of patients with advanced respiratory system disease for whom physical therapy is absolutely necessary will be required in the future.