• Title/Summary/Keyword: Theory of Cold Damage

Search Result 25, Processing Time 0.024 seconds

Damage Mechanism of Drift Ice Impact

  • Gong, Li;Wang, Zhonghui;Li, Yaxian;Jin, Chunling;Wang, Jing
    • Journal of Information Processing Systems
    • /
    • v.15 no.6
    • /
    • pp.1350-1364
    • /
    • 2019
  • The ice damage occurs frequently in cold and dry region of western China in winter ice period and spring thaw period. In the drift ice condition, it is easy to form different extrusion force or impact force to damage tunnel lining, causing project failure. The failure project could not arrive the original planning and construction goal, giving rise to the water allocation pressure which influences diversion irrigation and farming production in spring. This study conducts the theoretical study on contact-impact algorithm of drift ices crashing diversion tunnel based on the symmetric penalty function in finite element theory. ANSYS/LS-DYNA is adopted as the platform to establish tunnel model and drift ice model. LS-DYNA SOLVER is used as the solver and LS-PREPOST is used to do post-processing, analyzing the damage degrees of drift ices on tunnel. Constructing physical model in the experiment to verify and reveal the impact damage mechanism of drift ices on diversion tunnel. The software simulation results and the experiment results show that tunnel lining surface will form varying degree deformation and failure when drift ices crash tunnel lining on different velocity, different plan size and different thickness of drift ice. The researches also show that there are damages of drift ice impact force on tunnel lining in the thawing period in cold and dry region. By long time water scouring, the tunnel lining surfaces are broken and falling off which breaks the strength and stability of the structure.

Studies of the symptom of Poria Scleotium (茯笭) of Yoshimasi Todo (吉益東洞) (『약징(藥徵)』에 나타난 복령증(茯苓證)에 대한 고찰)

  • Kim, Hyung-woon;Kang, Yun-seok;Meng, Woongjae
    • The Journal of Korean Medical History
    • /
    • v.22 no.2
    • /
    • pp.43-62
    • /
    • 2009
  • Yoshimasi Todo (吉益東洞), who thought that the books on herbal medicines are the reason for the complicated explanation of the effects of herbs, thought that the articles from Treatise on Cold Damage Diseases (傷寒論) and Synopsis of Prescriptions of the Golden Chamber (金匱要略) are the only books that can identify the effects of herbs. He also thought that the practitioners from the later period have added too much on the original text, which led to his thought that the original text of Treatise on Cold Damage Diseases (傷寒論) and Synopsis of Prescriptions of the Golden Chamber (金匱要略) did not have the explanation that involves the theory of yin-yang(陰陽), the five phases(五行), and three yin and three yang(三陰三陽). From this, he investigated the standards of using the herbs in the Synopsis of Prescriptions of the Golden Chamber (金匱要略) by comparing the articles. In this point of view, Yoshimasi Todo (吉益東洞) said that Poria Scleotium (茯笭) treats palpitations (悸) and 肉瞤筋惕. This meant the symptom of unvoluntary palpitations and the trembling of muscles with wrenching pain. Also, he thought that the symptom of Poria Scleotium (茯笭) in the formula of decoction is shown by the symptoms of dizziness, palpatations, vomiting, trembling of muscles, and cramps. This paper studies on the symptoms that seems close to the meaning of the symptom of Poria Scleotium (茯笭) that Yoshimasi Todo (吉益東洞) meant, which can be summarized to palpatations and trembling of muscles. I wish this paper is of help to those who study Treatise on Cold Damage Diseases (傷寒論), Synopsis of Prescriptions of the Golden Chamber (金匱要略), and the medicine of Yoshimasi Todo (吉益東洞).

  • PDF

Literature Review on the Reverse (궐(厥)의 문헌적 고찰)

  • Gwak, Jae-Young;Lee, Yong-Tae
    • Journal of Physiology & Pathology in Korean Medicine
    • /
    • v.24 no.5
    • /
    • pp.737-747
    • /
    • 2010
  • In Neijing(內經) the theory of Reverse(厥) was explained syncope causes by disharmony of emotions irregularity, deficient or excessive Qi(氣虛, 氣實) and blood disorder, it was the causes of cold hypersensitivity of hands and feet except coldness itself, include impairment of Qi circulation and the deficiency of the kidney weakened essence and blood, weakness and damage in the kidney essence, deficiency of the lower part and deficiency of the lower Qi as the major causes. In Shanghanlun(傷寒論) the theory of Reverse(厥) was divided into by disharmony of heat or cold reversal symptom. In Jingyue quanshu(景岳全書), causes of Reverse(厥) was Qi and blood disorder, damps(痰飮), alcohol and sex include syncope. In Dongeuibogam(東醫寶鑑), causes of Reverse(厥) was deficient or excessive Qi, impairment of blood circulation which means the deficiency of blood, essence(精) and blood stasis (瘀血), and disorder of gastrointestinal system which means malfunction of gastrointestine, damps(痰飮) and toxicity of alcohol. The rest of the causes include San syndrome(疝症), sun stroke(暑病) and heat reversal(熱厥).

A study on the Ke-qin's recognition about Reverting yin disease pattern in Shanghanlun(傷寒論) (가금(柯琴)이 인식(認識)한 "상한론(傷寒論)" 궐음병(厥陰病)에 관한 연구(硏究))

  • Lee, Sang-Hyup
    • Journal of Korean Medical classics
    • /
    • v.25 no.4
    • /
    • pp.23-38
    • /
    • 2012
  • Objective : Generally speaking Reverting yin disease pattern(厥陰病) is the last step in cold damage(傷寒). Therefore recognized Yin cold disease(陰寒病) is increasing, and resist action One Yang qi(一陽) began to creep into body. But Ke Qin(柯琴) have a different way of thinking that Reverting yin disease pattern connected with the loss of Liver's function. Liver qi depression(肝鬱) make a ministerial fire(相火), and it make a nutrient and blood insufficiency(營血不足). Method : I will try to describe the Sanghanlun's Reverting yin disease pattern through the Ke-qin's JueyinbingJie(厥陰病解), and I would like to point out that the exact meaning of Reverting yin(厥陰) is connected with Liver's ministerial fire. Result : Ke Qin's JueyinbingJie explained the Reverting yin disease pattern was connected with Liver(肝), and according to Six qi theory(六氣學說) connected with ministerial fire, and according to meridian and Collateral theory(經絡學說) connected with closing referring to inward actions(闔) among the Opening closing and pivot(關闔樞). Conclusion : Ke Qin was recognized that Reverting yin disease pattern have relevance to the loss of Liver's function. In other world, It is connect with soothe the liver and purge fire(疏肝瀉火) and nutrient and blood insufficiency(營血不足).

The Origin of Shanghanlun Six Meridians - The Theory of Meridians is at the core - (상한육경(傷寒六經)의 기원(起源)에 대(對)한 연구(硏究) - 경맥학설(經脈學說)과의 비교(比較)를 중심(中心)으로 -)

  • Park, Yung-Hwan
    • The Journal of Korean Medical History
    • /
    • v.26 no.1
    • /
    • pp.27-39
    • /
    • 2013
  • The Theory of Meridian can be classified into early form of pre- and present form of after-. The representative early form of meridian is Eleven Meridians in Mawangdui scrolls(馬王堆帛書) which use Six Qi Diagnosis(六氣辨證). because it did not adopt Visceral Pattern Identification(臟腑辨證). The present form of meridian is Twelve Meridians of . It has developed to investigate relations between Visceral and disease with Five Phase Theory. Analyzing the name of the Six Meridians in the Shanghanlun(傷寒論)On Cold Damage, there are no hands, feet and visceral signs. and it is almost identical to Eleven Meridians in Mawangdui scrolls. According to , Eleven Meridians use only Six Foot Meridians(足六經) to classify diseases. This fact was applied identically to the Six Meridians in the Shanghanlun. Therefore many doctors, especially Hanzhihe(韓祗和) and Zhangzhicong(張志聰) mentioned that "I have never seen a book on Shanghanlun discuss about Hand Meridians(手經)."

A Study of Huatuo's Shang-han (Cold Damage) Theory (화타상한(華佗傷寒)에 관(關)한 소고(小考))

  • Kang, Min-Whee;Lee, Byung-Wook;Kim, Ki-Wook
    • The Journal of Korean Medical History
    • /
    • v.31 no.1
    • /
    • pp.71-87
    • /
    • 2018
  • This study investigated Hua Tuo's Shang-han theory, which precedes the period of Zhang Zhong Jing's Shang-han theory, and considers the relationship between the two approaches. Researchers compared terminology and language of Hua Tuo's Shang-han theory as published in Theory in Qian Jin Yao Fang and Wai Tai Mi Yao, with Zhang Zhong Jing's Shang-han theory. In Hua Tuo's theory, Shang-han involves pathogenic invasion of the body surface, where the pathogen transforms to 6 different stages, Pi (皮), Fu (膚), Ji (肌), Xiong (胸), Fu (腹), Wei (胃). Among these, the stage sof Pi (皮), Fu (膚), Ji (肌) can be considered as exterior syndrome (表證). Those that invade the lower chest can be considered as lower chest disease, and those that violate the abdomen or stomach can be considered as Interior heat excess syndrome (裏熱實證). Stomach heat excess syndrome (胃中實熱證) is the most severe and is similar to septicaemia or bubonic plague. Hua Tuo's treatment used three methods which are 汗 (perspiration), 吐 (emesis), 下 (purgation). In the case of Phlegm syndrome (痰?證), HuoTuo's theory was similar to Zhang Zhong Jing's Shang-han exterior syndrome (傷寒表證) and therefore used Zhuling-powder (猪?散). In the case of deficiency hot flush Syndrome (虛煩證) in Shang-han disease, HuoTuo uses ZhuYe-decoction (竹葉湯), of which the drug contents is the same as Zhang Zhong Jing's ZhuYeShiGao-decoction (竹葉石膏湯), which was used for the same condition.

Refutation against the Non-Scientificity Argument on Korean Medicine (한의학의 비과학성 논란에 대한 반박)

  • Chi, Gyoo Yong
    • Journal of Physiology & Pathology in Korean Medicine
    • /
    • v.33 no.5
    • /
    • pp.249-254
    • /
    • 2019
  • This study is aimed to refute against medical opponent's claim that Korean medicine does not conform to the conditions of science. Analyses and refutations against a journal treatise and a Facebook column formally written for a logical criticism and attack were conducted. As an example of the logic of the knowledge production process in Chinese medicine, 8 principle theory was exemplified in the Han danasty Classics "Neijing" and "Shanghanlun" at first. The knowledge was continuously revised and accumulated historically and then completed through Ming、Cheng period. The differential diagnosis and treatment theory is a logical process of forming knowledge through the process of abduction, deduction and induction begun from "Shanghanlun" succeeded to nowadays and it is essentially equaled with the process of experimental inference by Claude Bernard. Examples of normal science status based on Kuhn's scientific standards include the theory of 8 principle, differntial diagnosis of viscera and bowel, 3 yang and 3 yin diseases of "Shanghanlun" and warm disease theory. Examples of science lost or get its normal status by refutation following Popper's standards were cold damage theory and warm disease theory respectively. This allowed Chinese medicine to follow the general principles of science that form scientific knowledge and to correspond with the demarcation standards and concepts of science. However, as one of the conditions for becoming a science, Chinese medicine is partially lacking in terms of the interpretation of text language or the accordance with modern knowledge. Therefore methods are required to supplement this lack through multi-faceted research such as literature-based, theoretical and clinical studies.

A Study on the Fatigue Life Evaluation of Spot Welded Joints under Tensile-Shear Loading (인장-전단 하중을 받는 점용접부의 피로 수명 평가에 관한 연구)

  • Chung, K.;Kim, H.
    • Journal of Power System Engineering
    • /
    • v.5 no.1
    • /
    • pp.80-88
    • /
    • 2001
  • The spot welding method has been used in the joining of structures, automotive body, railway carriage, aircraft, household electric appliances, precision parts etc., because of brief working, easy automation, available mass production, and convenience. In this paper, the effects of welding conditions on the fatigue life and the prediction of fatigue life based on fracture mechanics theory of spot welded joint were investigated. Fatigue tests were conducted with the tensile-shear specimens welded in the various current using cold rolled steel sheets. Fatigue life of spot welded joint was predicted and compared with experimental results. Using FEM(finite element method), we analysed the distribution of stress and the condition of deformation on the environments of nugget.

  • PDF

The Memory of War : from War Damages to Natural Disaster -The Evacuation Image Portrayed in Korean War Painting (전쟁의 기억: 전재에서 자연재해로 - 6.25전쟁기 회화 작품에 나타난 피난 이미지)

  • Cho, Eun-jung
    • The Journal of Art Theory & Practice
    • /
    • no.13
    • /
    • pp.7-33
    • /
    • 2012
  • The memory of the Korean War is about the time period when people lived toughly during evacuation, due to being exposed to the natural climate such as intense cold or heat without any protection, leaving their comfortable home and living in temporary built shelters which were barely enough to avoid the wind. 'Death is concealed and only the figures of evacuation for survival were expressed, just as how the government ordered. Since the experience of the battlefield is personal and fragmentary, that is broken into pieces, it does not have compatibility. As war is a distorted experience that cannot be placed in a big picture, it is not possible to take a view of the war's big picture. Having this individualized experience as a common collective memory is an issue and it is the will that people tries to pursue. The reason why the evacuees from north to south, and as well as from the south to further south were all able to be adopted as the theme of artworks due to the military action that emptied the occupied territories of the North Korean Army under the forced removal command. In such situations, the natural state of the 'snow' was like a symbol of the 1.4 Recession. The group of people who were thrown into the intense cold displaced the war damage of loosing their base livelihood, and symbolized the obedient citizens who faithfully follow their government's command. The figure of advocating anti-communism is projected as a figure of a refugee during cold winter-time and it contains ones past which he or she obeyed its own country's commands. Evacuation, especially the evacuation during the winter is a visual device that can confirm these kinds of country's command. The consequences were same for the artists as well. Therefore, the situation being communal could be found due to the individual experiences during war are ideological. The image of the refuge shown in the picture played the role of strengthening the consciousness of defecting to South Korea into the meaning of the 'Finding Freedom.' I would like to express that the reason of them leave their home during the harsh winter is in order to avoid the oppression of the Communist Party. The evacuation that people went through was not to 'Finding Freedom', but 'To Survive'. Later, this evacuation has been imprinted as a behavior of choosing free Republic of Korea, which was an ideological issue. Anti-communism was the rule of survival in South Korea society, and people have the tendency to remember what they want to remember. As it is not the people who possesses an incident, but the memory that possesses ones, people cover their memory with disguised plots in order to forget the violence and to live a different prologue. They share the incident of violence as a hurtful memory. The tragedy of the Korean War was the result of Ideology and being in between the powerful nations' rights, but the violence during the war has been depicted as a natural disaster, which was the evacuation in heavy snow.

  • PDF

A Research on The Pulse & Disease-patterns and Diagnostic Theory of Exogenous Febrile Disease in the "Sanghanjeonsaengjip(傷寒全生集)" ("상한전생집(傷寒全生集).변상한발열례(辨傷寒發熱例)" 등에 대한 연구(硏究))

  • Choi, Dong-Su;Sheen, Yeong-Il1
    • Journal of Korean Medical classics
    • /
    • v.23 no.4
    • /
    • pp.103-153
    • /
    • 2010
  • "Sanghanjeonsaengjip(傷寒全生集)" is a classic medical work, written by the outstanding physician Dohwa(陶華) in the Ming Dynasty. The characteristic of "SangHanJeonSaengJip" is that this book succeeded to the spirit of pattern identification and treatment of Treatise on Cold Damage Diseases, newly changed a table of contents by symptoms, and together with this indicated the prescriptions in accordance with diswase-pattern at "YujeunghwalInseo(類證活人書)", "Hwajegookbang(和劑局方)" etc. Also because this kept the existing ephedra decoction, cinnamom twig decoction, minor decoction of bupleurum, decoction for reinforcing middle-energizer and replenishing qi etc.'s name on and unlikely indicated the medicine composition, it caused confusion, but at the later ages "Euhakipmun(醫學入門)" the so-called 'Doci(陶氏)' was added to the prescription name, so we are able to distinguish. Together with this, this book dose not indicate the dosage of medicine and indicates the first, the second, and the third classes[上中下] below medicine. As this dose not mean the three grades of quality"good, fair, and poor[上中下] of "Shennong's Classic of Materia Medica" but expresses the sovereign medicinal as the first class[上], minister medicinal as the second class[中] and assistant and courier medicinal as the third class[下], doctors can voluntarily decide the dosage of medicine in accordance with the degree of disease. At this thesis, I single out ten chapters in contents of 2nd volume named Hyeong(亨) corresponding to the details, among "Sanghanjeonsaengjip(傷寒全生集)". I discussed superficial fever types of exogenous febrile disease in chapter 1, aversion to cold types of exogenous febrile disease in chapter 2, syndrome caused un-sufficient sweating in chapter 3, organic fever types of exogenous febrile disease in chapter 4, aversion to wind types of exogenous febrile disease in chapter 5, Tidal fever types of exogenous febrile disease in chapter 6, Alternative attacts of chills and fever in chapter 7, Dysphoria with smothery sensation in chapter 8, Fidgetiness of exogenous febrile disease in chapter 9, and Headache of exogenous febrile disease in chapter 10, and together with this I discussed, in detail, which influence the prescriptions which are listed on each chapter have caused on future generations In accordance with this, I think that the above-mentioned symptoms and prescriptions are important when I research cold damage and warm disease study. So I orderly research revision, annotation, rendering and an investigation.