• Journal of Korean Medical classics
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• v.4
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• pp.75-100
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• 1990

As a result, the investigation into Gyung-Ak (景岳)'s theory of Myungmun (命門) was led to the next conclusions. First, Gyung-Ak (景岳) defmed Myungmun as the gate of Suncheon (先天) and Whoocheon (後天), by which the life of Suncheon is obtained and the life of Whoocheon is maintained. He maintained that Myungmun is located between two kindneys, not sided to the right as in the Nankyeong (難經), and considered the substance of Myungmun as Jagung (子宮 ${\fallingdotseq}$ uterus) or the other names as such Jaho (子戶), Jajang (子腸) Danjeon (丹田), Hyeolsil (血室), etc. On the essence or function of Myungmun it was considered as Taegeuk (太極) of the body which shapes the North Pole in the center of the body, and as the hinge of rise and fall, as controller of Soowha-action (水火作用) and Eumyang-changing (陰陽變化), and as storage of Suncheon Jinil-ki (先天 眞一之氣), the source of life and vitality and as the spring of Twelve-Jang (十二藏). Thus, the function of Five-Jang (五臟 ${\fallingdotseq}$ Five-Viscera) and Six-Boo (六腑 ${\fallingdotseq}$ Six-Bowels) and actions of life is obtainded by Myungmun, and the life and death of man and the change of life is related to that. Bi-Wi (脾胃 ${\fallingdotseq}$ Spleen & Stomach) as well as Myungmun is the root of Five-Jang and Six-Boo, but since Bi-Wi is the base of postnatal nutrition to belong to the son of Wonyang (元陽), Myungmun is treated more important as the mother of Bi-Wi. Sin (賢 ${fallingdotseq}$ Kidney) was perceived as inseparably related with Myungmun, but in the course of theoretical development the function of Sin was considered to be ultimately operated by the action of Myungmun. In the Theory of Jineum (眞陰論), Gyung-Ak full accounted the diverse nature of disease and patholog from Soowha-shortage of Myungmun, and presented the laws and methods of medical treatment to those. Finally, in his theory related to Myungmun, some logical contradiction and confusion in conceptions was discovered and the anatomy of Present age proved that the location of Jagung and DanJeon, which he recognized as the substance of Myungmun is not coincided. Summerizingly, the Gyung-Ak's theory of Myungmun closely related the theory of Myungmun to the theory of Eumyang-Jungki (陰陽精氣論), by whole discourse of the characteristics of physiology possessing Soowha of Myungmun on the foundation of Eumyang-hogeun (陰陽互根) and Jungki-hosaeng (精氣互生). Gyung-Ak regarded the function of Myungmun as more important than any other Jang, discoursed more systematically and more specifically about the Myungmun than any others, and presented the theory of Sin-Myung (賢命理論) and prescription which is important to Care of Health and Medical Treatment (養生治病), thus influenced very greatly on the development of Oriental Medicine.

• Journal of the Korea institute for structural maintenance and inspection
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• v.17 no.6
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• pp.61-69
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• 2013

This research is aimed to evaluate characteristics and dynamic modeling of MR damper for semi-active vibration control. A MR damper of semi-active type was designed and made for the purpose of controlling the vibration of a real-size model structure. Usually a semi-active control system equipped with a MR damper requires a dynamic model which expresses numerical data about the damping capacity and dynamic characteristics generated by a MR damper. To fulfil the requirement, a Power model and a Bingham model were particularly employed among many dynamic models of MR damper. Those models being contrasted with other ones, a dynamic test was carried out on the developed MR damper. In the test, excitation frequencies were conditioned to be 0.15 Hz, 1.0 Hz, and 2.0 Hz, and three different currents were adopted for each frequency. From these test results, it was found that displacement affected control capacity of the MR damper. The test results led to the identification of model variables for each dynamic model, on the basis of which a force-speed relation curve and expected damping force were derived and contrasted to those of the developed MR damper. Therefore, it was proven that the MR damper designed and made in this research was effective as a semi-active controller, and also that displacement of 2mm at minimum was found to be secured for vibration control, through the test using various displacements.

• Journal of the Institute of Convergence Signal Processing
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• v.20 no.1
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• pp.16-23
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• 2019

Fine particulate matter known as PM 2.5 refers to the atmospheric particulate matter that has a diameter less than 2.5 micrometer identified as dangerous element for human health and its concentration can provide us a clear picture about air dust concentration. Humans stay indoor almost 90% of their life time and also there is no official indoor dust concentration data, so our study is focused on measuring the indoor air quality. Indoor dust data monitoring is very important in hospital environments beside that other places can also be considered for monitoring like classrooms, cements factories, computer server rooms, petrochemical storage etc. In this paper, visible light communication system is proposed by Manchester encoding technique for electromagnetic interference (EMI)-free indoor dust monitoring. Important indoor environment information like dust concentration is transferred by visible light channel in wide range. An average voltage-tracking technique is utilized for robust light detection to eliminate ambient light and low-frequency noise. The incoming light is recognized by a photo diode and are simultaneously processed by a receiver micro-controller. We can monitor indoor air quality in real-time and can take necessary action according to the result.