• Journal of Astronomy and Space Sciences
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• v.22 no.2
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• pp.139-146
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• 2005

A model of advection-dominated accretion flows has been highlighted in the last decade. Most of calculations are based on self-similar solutions of equations governing the accreting flows. We revisit self-similar solutions of the simplest form of advection-dominated accretion flows. We explore the parameter space thoroughly and seek another category of self-similar solutions. In this study we allow the parameter f less than zero, which denotes the fraction of energy transported through advection. We have found followings: 1. For f > 0, in real ADAF solutions the ratio of specific heats ${\gamma}$ satisfies 1 < ${\gamma}$ < 5/3 for O ${\leq}$ f ${\leq}$ 1. On the other hands, in wind solutions a rotating disk does not exist. 2. For f < 0, in real ADAF solutions with ${\epsilon}$ greater than zero ${\gamma}$ requires rather exotic range, that is, ${\gamma}$ < 1 or ${\gamma}$ > 5/3. When -5/2 < ${\epsilon}$' < 0, however, allowable ${\gamma}$ can be found in ${\gamma}$ < 5/3, in which case 4{\Omega}_0$,_ is imaginary. 3. For a negative $u_0$,+ with f > 0, solutions are only allowed with exotic ${\gamma}$, that is, 1 < ${\gamma}$ or ${\gamma}$ > (5f/2-5/3)/(5f/2-1)when O < f < 2/5, (5f/2-5/3)/(5f/2-1) < ${\gamma}$ < 1 when f > 2/5. Since ${\epsilon}$' is negative, 4{\Omega}_0$,+ is again an imaginary quantity. For a negative $u_0$,+ with f < 0, ${\gamma}$ is allowed in 1 < 7 < (5|f|/2 + 5/3)/(5|f|/2 + 1). We briefly discuss physical implications of what we have found.

• Journal of Korean Medical classics
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• v.12 no.1
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• pp.168-195
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• 1999

The hakgil is the important disease in the oriental medicine historically. In the preseant time also this disease continually appear all over the world. So purpose of this study is that consider the symptoms and pathogenesis of hakgil(瘧疾) with the point of view of oriental medicine. And in this study, the results are summarized as the followings. 1. The symptos of hakgil(瘧疾). 1) Rigor and heat spasm : The main symptoms of hakgil is the severe and periodical rigor and heat spasm. Generally the rigor first appear and later the heat spasm appear. According to the first and last, severe and weak, the hakgil is classified to hanhak(寒瘧), onhak(溫瘧), danhak(癉瘧), binhak(牝瘧). 2) The regulation of the time of spasm : The spasm occour in the same time daily or one time in two days, three days or several days. And the spasm time is regulary in day or night. 3) The term between the spasm and next one become later or faster. It can be decided that the becoming worse and better in the disease with the signs. 4) The seasonal property Generally the hakgil appear in summer and early autumn. 5) The other kind of hakgil there are five-organ hakgil(五臟瘧), six-kyung hakgil(六經瘧), janghak(瘴瘧), kuihak(鬼瘧), six-gi hakgil(六氣瘧), damhak(痰瘧), sikhak(食瘧), and so on. 6) The pulse condition of the hakgil is chiefly hyun(弦). 2. The pathogenesis of the hakgil 1) The cause of the hakgil The causes of the hakgil first are the seo(暑) or heat(熱) that make the problem in the cycle of five phases(五行). In the consequence, il open the hole of skin so that the pathogenic factors easily invade the humanbody and at the same time the pathogenic factor in the inside easily come out, that make the spasm. In the second time the pathogenic factor of yin(陰) - wind(風), cold(寒), water(水) invade through the opened skin to combine with the factor in the inside. Such condition make the hakgil and the accessory spasm. 2)The pathogenesis of hakgil(瘧疾) (1) The rigor and heat spasm of hakgil(瘧疾) appear because in summer the human body don't accomplish a task of summer because of hot weather or heat, so in autumn the ki(氣) of human body separate into yin(陰) and yang(陽), and the skin of human body is weaken so the saki(邪氣: pathogenic factors) is easily come into the human body. At this time the circulation of ki(氣) is obstructed, so the jungki(精氣: vital substance) apply to straighten the circulation of ki(氣), if the jungki(精氣: vital substance) help the yin(陰) the rigor spasm appear in the opposit direction the jungki(精氣: vital substance) help the yang(陽) the heat spasm appear. (2) The period of circulation of ki(氣) and jungki(精氣: vital substance) is one day, so the general period of spasm of hakgil(瘧疾) is one day, But if the saki(邪氣: pathogenic factors) come into the human body deeply, the jungki(精氣: vital substance) cannot apply 10 straighten the circulation of ki(氣) every day so the period of spasm become longer.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.9 no.9
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• pp.721-736
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• 2019

In this paper, the behavior of the fire smoke due to the operation of the ventilation systems when the fire occurred in the underground station (6 basement floors) and the tunnel at the great depth was measured. Fire smoke was generated by using a smoke generator which realized heat buoyancy effect by using hot air blower. The two locations of the fire were selected on the platform and on the platform of the tunnel located outside the screen door. A ventilation mode is generally used in which smoke is exhausted through a vent hole provided in a platform when a platform fire occurs. The tests were performed by operating the exhaust through the ventilation holes of the tunnel part located at both ends of the platform. The smoke density and the wind speed/velocity were measured at various positions, and the videos were taken to analyze the movement and smoke of the smoke. In both cases for fire inside the platform and in the railway tunnel, due to the ventilation mode operation of the fan for the platform and the exhaust of the fans in the tunnel smoke were well exhausted and the smoke propagation to the area near the smoke zone was suppressed. The smoke-control mode, which is applied to both fans for the platform and fans for in the tunnel at both ends of the platform, can provide a safer evacuation environment to the passengers from the fire smoke when the platform fire or fire train stops.

• Journal of Music and Human Behavior
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• v.15 no.2
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• pp.23-39
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• 2018

The purpose of this research was to investigate the effects of respiratory rehabilitation using a wind instrument for patients suffering from spinal cord injuries. From January 15, 2018 to April 15, 2018, we conducted ten 1-hour sessions of a harmonica program with eight patients with spinal cord injuries with average age of 37 years who could not perform abdominal breathing by themselves. We measured and compared patients' breathing capacity before and after the 10 sessions. Designed particularly for patients with spinal cord injuries resulting in a limited range of neck movement, the study used a 10-hole diatonic harmonica whose length was relatively short. For those patients who had difficulty using their hands, a harmonica holder was provided. Participants were trained to play simple tunes. They were guided to use abdominal breathing to make sounds, with emphasis on those parts requiring long and strong breathing. The results showed that for all eight patients both their breathing volume and their inspiratory volume increased following participation in the harmonica program. Also, the program had psychological benefits (e.g., more life satisfaction and less sadness) and additional physical benefits (e.g., less dizziness due to low blood pressure and better phlegm spitting). This study offers a unique way to help patients with spinal cord injuries to improve their breathing capacity, which may also be associated with a greater quality of life.

• Journal of the Korean Institute of Gas
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• v.26 no.4
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• pp.27-35
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• 2022

When LPG leaks from the storage tank, the gas try to sink to the ground because LPG is heavier than air. The gas easily creates vapor clouds causing aggressive accidents in no airflow. Therefore, It is important to prevent in advance by analyzing the damaged range caused from LPG leakage and vapor clouds. So, this study analyzed the range of damaged by LPG leakage and vapor clouds with consideration of the cold air flow which is generated by the topographical characteristics and the land use status at night time in the Jeju Hagari. As a result of the cold air flow using KLAM_21, about 2 m/s of cold air was introduced in from the southeast due to the influence of the terrain. The range of damaged by LPG leakage and vapor cloud was analyzed using ALOHA. When the leak hole size is 10 cm at the wind speed of 2 m/s, the range corresponding to LEL 60 % (12,600 ppm) was 61 m which range is expected to influence in nearby residential areas. These results of this study can be used as basic data to prepare preventive measures of accidents caused by vapor cloud. Forward, it is necessary to apply CFD modeling such as FLACS to check the vapor cloud formation due to LPG leakage in a relatively narrow area and to check the cause analysis.