• Journal of Sasang Constitutional Medicine
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• v.8 no.2
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• pp.69-94
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• 1996

The main purpose of this work is comparing the difference between Soumin Bojungyikgitang of constitutional medicine and Li Dongyuan's Bojungyikgitang Bojungyikgitang, the prescription originated from the Pi-Wei theory(脾胃論) of Li Dongyuan who was a medical man in the Jin Yuan dynasty, had been used widely for many kinds of disease caused by the singking of the qi of middle energizer due to the weakness of the spleen and stomach. But in the singking of the qi of middle energizer due to the weakness of the spleen and stomach. But in the end of Choseon dynasty Li Je Ma, the creator of the constitutional medicine, modified the Bojungyikgitang and applied to Soumin's disease. In this paper, the difference between the two prescription were investigated from the viewpoint of chinese herb pharmacology and purpose of prescription. Additionally the problems which could be brought out by applying Bojungyikgitang to the Soyangin and the Taeumin were studied. And the conclusion could be summarized as follows: 1. The prescription of the Li Dongyuan's Bojungyikgitang is based on the deficiency of vital energy due to internal damage and the Soumin Bojungyikgitang is useful to only a certain stage of progressing disease on the basis of Shanghanlun(傷寒論). 2. In the Li Dongyuan's Bojungyikgitang, Cimicifugae Rhizoma and Bupleuri Radix were used for emphasizing the ascending action and have the antipyretic action and the effect of elavating of yangqi as they are bitter in taste and cold in nature. 3. In the Soumin Bojungyikgitang, Pogostemonis Herba and Perillae Folium have the ascending-descending action and strengthen the stomach with the effect of mild sweating by pungent taste and warm nature. 4. The effect of elavating of yangqi in the Li Dongyuan's Bojungyikgitang offers the pathway where vital qi go up by eleminating the pathogenic fire with the action of Cimicifugae Rhizoma and Bupleuri Radix in the triple energizer and yangming muscular striae. On the other hand, the Soumin Bojungyikgitang depends on the effect of reinforcing qi and elavating yangqi by Astrgalli Radix entirely and supply vital qi by reinforcing yangqi with Ginseng Rsdix. 5. The exahausion of yin(亡陰證) in the Soyangin exterior syndrome and cold limbs(寒厥證) in Taeumin exterior syndrome are similar to the indication of Li Dongyuan's Bojungyikgitang. As the causes of the disease are fundamentally different in the view of constitutional medicine, the diseases could be aggravated by applying Li's Bojungyikgitang. These results suggest that Li Dongyuan's Bojungyikgitang is proper to the exterior syndrome of Soumin and Soumin Bojungyikgitang seems to be appropriate to the Soumin's disease.

• Journal of Korean Medical classics
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• v.36 no.2
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• pp.61-75
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• 2023

Objectives : This study aims to examine the multi-layered meanings of Li Dongyuan's concept of 'internal damage' through examining the origins of the 'internal damage' concept together with discussions derived from his 'Differentiation of Internal and External Damage'. Methods : Rather than Li's original works, those done by later doctors who were influenced by Li were thoroughly examined in this study to determine the relationships among internal and external damage, and external contraction. Results : Based on discussions related to the 'differentiation of internal and external damage' following Li, his concept of 'internal damage' could be understood as multi-layered, as it contains both spatial as well as pathogenic meaning. Therefore the meaning behind categorizations of internal and external damage, and internal damage and external contraction could be different. Li's 'internal damage' concept includes not only internal pathogen but elements of external contraction of wind and cold, which seems to have been integrated into the 'Cold Damage Theory' after Zhu Danxi, seemingly having changed the concept of cold damage. Therefore, discussions on the crossing between internal damage and external contraction have on one hand expanded the boundaries of each concept, while on the other hand, have caused confusion between the two at times. Conclusions : The concept of 'internal damage' has been widely accepted due to Li Dongyuan, on which related discussions have been centered. However, the concept was originally multi-layered, naturally leading to various discussions. Future studies should focus on the relationship of 'internal damage' with 'external damage' or 'external contraction', beyond the theories of Li.

• Herbal Formula Science
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• v.9 no.1
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• pp.105-136
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• 2001

Objectives : 'Pi Wei Lun' is the principal medical work of Li Dongyuan's writings, which contains most of his medical theories. There are sixty-three prescriptions in 'Pi Wei Lun', and fifty-two of them were originated from him. This study was planned to present assistance to those who apply Dongyuan's theory clinically. Methods : We investigated those fifty-two prescriptions literary, and studied them from a viewpoint of the principle and method of treatment. Results : Dongyuan's fifty-two prescriptions can be classified into eight groups from the viewpoint of the principles and methods of treatment which are composed of 'tonify the spleen and stomach & elevate the spleen Yang', 'elevate the spleen Yang & expel fire', 'elevate the spleen Yang & relieve dampness', 'promote blood flow to eliminate blood stasis', 'invigorate the spleen', 'replenish Ki & and dispel phlegm', 'purgation with drugs warm in nature', and 'the other' eight methods. Conclusions : From above, we concluded that Dongyuan considered 'the primordial energy of the spleen and stomach' as the most important when making up prescriptions, but, at the same time, he used diverse methods of treatment on the ground of differentiation of syndromes.

• The Journal of Korean Medical History
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• v.34 no.1
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• pp.59-74
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• 2021

Li Gao left a great mark in the history of Chinese medicine by founding Piwei (脾胃) theory. When explaining Li Gao's medical ideology, researchers explain that his medical ideology was created by curing hunger during wartime and treating diseases of people who suffered from battle field trauma. However, Li Gao also suffered from battlefield trauma for his experience of the Mongol siege of Kaifeng (開封城) from 1232 to 1233. It is the hypothesis of this study that Li Gao himself would have suffered posttraumatic stress disorder (PTSD), and this study reexamines the process more closely from the viewpoint of PTSD and posttraumatic growth (PTG). The conclusion of this study is that his achievement in medical history is a result of his PTG. Li Gao's narrative of Piwei (脾胃) theory contains elements that seek revenge against the Mongol soldiers, and Li Gao achieved extraordinary PTG by overcoming the trauma of the siege of Kaifeng step by step.

• Journal of Korean Medical classics
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• v.35 no.4
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• pp.97-114
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• 2022

Objectives : Background research on the history of Huangbo's taste being written as 'pungent' was undertaken, after which its clinical meaning was examined from the medical perspective that was behind the medicinal's taste designation. Furthermore, through various understandings on the 'pungent' taste within the process of clinical application, the meaning of 'pungent' in Korean medicinal research was re-evaluated. Methods : Description of Huangbo's taste as 'pungent' as written in medical texts were chronologically examined to determine its origin. The clinical meaning of the pungent taste of Huangbo was examined within the broad medical perspective of doctors who were behind these descriptions. Results & Conclusions : The pungent taste of Huangbo was first described by Zhang Yuansu, followed by doctors of the Yishui School such as Li Dongyuan, Wang Haogu, etc., during which such knowledge was established and contributed to recognition of Huangbo's effect as tonifying Kidney deficiency and treatment of fire within water, after reaching the Kidney. Li Dongyuan understood the meaning of Huangbo's pungent taste as eliminating Yin fire and restoring the upward direction, ultimately restoring the general 'Rising-Falling-Floating-Sinking' mechanism within the context of his inner damage treatment. On the other hand, Zhu Danxi interpreted the pungentness of Huangbo based on his understanding of the nature of fire and action towards it. It seems as Huangbo's effects were understood within a relatively narrow frame, application of its pungent taste became vague, which gave rise to criticism by later period doctors, ultimately leading to an ambiguous understanding of the pungent taste of Huangbo.

• Journal of Electrical Engineering and Technology
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• v.10 no.5
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• pp.1958-1968
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• 2015

In this paper, a new definition of short-circuit ratio concept for multi-converter HVDC systems is proposed. Analysis results of voltage interaction between converters show that the reactive power-voltage characteristic of a converter has a dominant effect on voltage interaction level compared with its active power-voltage characteristic. Such a relation between converter reactive power and voltage interaction level supports taking the former into account in the definition of short-circuit ratio concept for multi-converter systems. The proposed definition is verified by the method of maximum power curve for various system configurations. Furthermore, a formula to calculate transient overvoltage for multi-converter systems is derived based on the proposed definition, and the efficiency of the derived formula is verified.

• Journal of Korean Medical classics
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• v.35 no.4
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• pp.127-141
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• 2022

Objectives : The mechanism of Gegenjieji-tang from the Han chapter of Donguibogam was studied. Focus was on the wind medicinals which constituted a large part of the formula. Methods : Medical texts from which Gegenjieji-tang originated were searched in the Zhongyifangjidacidian with which application, composition, and treatment mechanism of the Gegenjieji-tang as written in medical texts such as the Donguibogam were compared. Based on related research and medical texts, it could be determined that many ingredients of the formula were wind medicinals as suggested by Li Dongyuan. The meaning of such composition was analyzed through texts such as the Piweilun, after which mechanism of the Gegenjieji-tang was examined. Results : Based on the Zhongyifangjidacidian, Gegenjieji-tang of the Donguibogam seems to have originated from the Chaigejiejitang of the Shanghanliushu, as medicinal composition and medical application written in texts such as the Donguibogam and Shanghanliushu, along with treatment mechanism, are found to be similar to each other. Gegenjieji-tang is applied to relieve the flesh and the Stomach Channel of pathogenic Qi. The formula includes gegen, chaihu, qianghu, and shengma, which are wind medicinals according to Li Dongyuan. Wind medicinals generally have the property of uplifting and dispersing Qi. The four aforementioned herbs relieve fire stagnation and relieve heat in the flesh and muscles. Conclusions : Based on the composition of the formula which includes the four herbs that uplifts and disperses Qi, and relieves fire stagnation, it could be understood that the Gegenjieji-tang has the effect of easing the flesh through loosening Qi stagnation. Gegenjieji-tang is not simply used to purge pathogenic Qi, but to communicate the bodily Qi ultimately easing the flesh.

• Journal for History of Mathematics
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• v.29 no.6
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• pp.325-333
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• 2016

Chinese Mathematics during the period of Jin (1115-1234) and Yuan (1271-1368) is an integral part of the high achievements of traditional mathematics during the Song (962-1279) and Yuan dynasties, which is another peak in the history of Chinese mathematics, following the footsteps of the high accomplishments during the Warring States period (475-221 BCE), the Western Han (206 BCE-24 ADE), Three Kingdoms (220-280 AD), Jin dynasty (265-420 AD), and Southern and Northern Dynasties (420-589 AD). During the Jin-Yuan period, Quanzhen Taoism was a dominating branch in Taoism. It offered certain political protection and religious comforts to many during troubled times; it also provided a relatively stable environment for intellectual development. Li Ye (1192-1279), Zhu Shijie (fl. late 13th C to early 14th C) and Zhao Youqin (fl. late 13th C to early 14th C), the major actors and contributors to the Jin-Yuan Mathematics achievements, were either heavily influenced by the philosophy of Quanzhen Taoism, or being its followers. In certain Taoist Classics, Li Ye read the records of the relations of a circle and nine right triangles which has been known as Dongyuan jiurong 洞渊九容 of Quanzhen Taoism. These relations made significant contributions in the study of the circles inscribed in a right triangle, the reasoning of which directly led to the birth of the Method of Celestial Elements (Tianyuan shu 天元术), which further developed into the Method of Two Elements (Eryuan shu ⼆元术), the Method of Three Elements (Sanyuan shu 三元术) and the Method of Four Elements (Siyuan shu 四元术).

• Journal of Electrical Engineering and Technology
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• v.11 no.2
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• pp.300-308
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• 2016

Application of demand-side resources to automatic generation control (AGC) has a great significance for improving the dynamic control performance of power system frequency regulation. This paper investigates the possibility of providing regulation services by demand-side energy storage in electric vehicle battery swapping stations (BSS). An interaction framework, namely station-to-grid (S2G), is presented to integrate BSS energy storage into power grid for giving benefits to frequency regulation. The BSS can be regarded as a lumped battery energy storage station through S2G framework. A supplementary AGC method using demand-side BSS energy storage is developed considering the vehicle user demand of battery swapping. The effects to the AGC performance are evaluated through simulations by using a two-area interconnected power grid model with step and random load disturbance. The results show that the demand-side BSS can significantly suppress the frequency deviation and tie-line power fluctuations.

• Journal of Electrical Engineering and Technology
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• v.9 no.6
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• pp.1832-1842
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• 2014

A novel probabilistic small signal stability analysis (PSSSA) method considering load correlation is proposed in this paper. The superiority Latin hypercube sampling (LHS) technique combined with Monte Carlo simulation (MCS) is utilized to investigate the probabilistic small signal stability of power system in presence of load correlation. LHS helps to reduce the sampling size, meanwhile guarantees the accuracy and robustness of the solutions. The correlation coefficient matrix is adopted to represent the correlations between loads. Simulation results of the two-area, four-machine system prove that the proposed method is an efficient and robust sampling method. Simulation results of the 16-machine, 68-bus test system indicate that load correlation has a significant impact on the probabilistic analysis result of the critical oscillation mode under a certain degree of load uncertainty.