Haidao Suanjing was introduced into Joseon by discussion in Yang Hui Suanfa (楊輝算法) which was brought into Joseon in the 15th century. As is well known, the basic mathematical structure of Haidao Suanjing is perfectly illustrated in Yang Hui Suanfa. Since the 17th century, Chinese mathematicians understood the haidao problem by the Western mathematics, namely an application of similar triangles. The purpose of our paper is to investigate the history of the haidao problem in the Joseon Dynasty. The Joseon mathematicians mainly conformed to Yang Hui's verifications. As a result of the influx of the Western mathematics of the Qing dynasty for the study of astronomy in the 18th century Joseon, Joseon mathematicians also accepted the Western approach to the problem along with Yang Hui Suanfa.
The molecular cloud, embedding AFGL 2591, has a "head-and-tail" structure with a total mass of ${\sim}\;1800\;M_{\odot}$, about half of the mass (${\sim}\;900\;M_{\odot}$) in the head (size ${\sim}\;1.2\;pc$ in diameter), and another half in the envelope (${\sim}\;3.5\;pc$ in the east-west direction). We found a new cloud in the direction toward north-east from AFGL 2591 (projected distance ${\sim}\;2.4\;pc$), which is probably associated with the AFGL 2591 cloud. The $^{12}CO$ spectrum clearly shows a blue-shifted high-velocity wing at around the velocity $-20\;{\sim}\;-10\;km\;s^{-1}$, but it is not clear whether this high-velocity component has a bipolar nature in our observations. The observed CN spectra also show blue-shifted wing component but the existence of the red-shifted component is not clear, either. In some CN and HCN spectra, the highvelocity components appear as a different velocity component, not a broad line-wing component. The dense cores, traced by CN and HCN, exist in the 'head' of the AFGL 2591 cloud with an elongated morphology roughly in the north-south direction with a size of about 0.5 pc. The abundance ratio between CN and HCN is found to be about 2 - 3 within the observed region, which may suggest a possibility that this core is being affected by the embedded YSOs or by possible shocks from outside.
New Pochonka published in the eighteenth century of the Choson dynasty was composed of star-charts based on the new observations made by Jesuits in China and songs corrected a little bit from previous version of Pochonka. The asterisms in the previous Pochonka are listed in the same order to that in the Song dynasty's literature; while the asterisms in the new Pochonka are listed in accordance with Pu-tien-ko published in China after the Ming dynasty. The Chinese-style twelve-equatorial-section system is adopted in the new Pochonka, while in its song is adopted the zodiac system, which can be seen in the star-charts of previous version of Pochonka. The asterisms belonging to three or four neighboring lunar-mansions are drawn in one chart. Each chart covers asterisms not belonging to a certain range of right ascension, but to a certain lunar mansion. We estimate the forming era of the new Pochonka from the following facts; that the Ling-Tai-I-Hsiang-Chih was used to make charts and footnotes whose archetype can be found in the Chinese literature around A.D. 1700, that these Chinese books were imported into Choson in A.D. 1709, that the naming taboo to the emperor Khang-Hsi was used, that the order of Shen-Hsiu (參宿) was transposed with Tshui-Hsiu (자宿), and that the new Pochonka was substituted for the old version when the rules of Royal Astronomical Bureau was reformed in A.D. 1791. In conclusion, the parent sources of the charts and footnotes of the new Pochonka might be imported from the Ching dynasty around 1709 A.D. to form the new Pochonka between A.D. 1709 and A.D. 1791, and finally to be published in A.D. 1792. We discuss the possible future works to make a firm conclusion.
We present the results of simultaneous monitoring observations of $H_2O$$6_{1,6}-5_{2,3}$ (22GHz) and SiO J=1-0, 2-1, 3-2 maser lines (43, 86, 129GHz) toward five post-AGB (candidate) stars, using the 21-m single-dish telescopes of the Korean VLBI Network. Depending on the target objects, 7 - 11 epochs of data were obtained. We detected both $H_2O$ and SiO maser lines from four sources: OH16.1-0.3, OH38.10-0.13, OH65.5+1.3, and IRAS 19312+1950. We could not detect $H_2O$ maser emission toward OH13.1+5.1 between the late OH/IR and post-AGB stage. The detected $H_2O$ masers show typical double-peaked line profiles. The SiO masers from four sources, except IRAS 19312+1950, show the peaks around the stellar velocity as a single peak, whereas the SiO masers from IRAS 19312+1950 occur above the red peak of the $H_2O$ maser. We analyzed the properties of detected maser lines, and investigated their evolutionary state through comparison with the full widths at zero power. The distribution of observed target sources was also investigated in the IRAS two-color diagram in relation with the evolutionary stage of post-AGB stars. From our analyses, the evolutionary sequence of observed sources is suggested as OH65.5+1.3${\rightarrow}$OH13.1+5.1${\rightarrow}$OH16.1-0.3${\rightarrow}$OH38.10-0.13, except for IRAS 19312+1950. In addition, OH13.1+5.1 from which the $H_2O$ maser has not been detected is suggested to be on the gateway toward the post-AGB stage. With respect to the enigmatic object, IRAS 19312+1950, we could not clearly figure out its nature. To properly explain the unusual phenomena of SiO and $H_2O$ masers, it is essential to establish the relative locations and spatial distributions of two masers using VLBI technique. We also include the $1.2-160{\mu}m$ spectral energy distribution using photometric data from the following surveys: 2MASS, WISE, MSX, IRAS, and AKARI (IRC and FIS). In addition, from the IRAS LRS spectra, we found that the depth of silicate absorption features shows significant variations depending on the evolutionary sequence, associated with the termination of AGB phase mass-loss.
I have felt seriously a desire to study and analyse the medicine of the period of the Three Kingdoms when I thought and studied the ancient medical history. Therefore in Chapter II I inquired into the background of Politico-social and the currency of thought. In the Chapter III inquired into the system of Medical politics in the period of the Three Kingdoms. In the Chapter IV inquired into the general view of the period of the Three Kingdoms. In the Chapter V inquired into the writings of Medicine and Doctors. From this study, I reached at following-conclusions. 1. The Three Kingdoms are politically opposed to each other, but socialo culturaly cooperated, connected each other to import the technique and thought which developed in China, so generally their system and life pattern are alike. 2. On the system of medical politcics Goguryeo(高句麗) had the system of court phisician, Baek jeo(百濟) had medical doctor and collector in the Ministry of Drug which took charge of teaching and medical treatment and specially had spellchanting doctor who treat epidermic and psychological diease untreated with herb and acupuncture, Shilla(新羅) had the system of Yak chun which was charge of teaching and treatment, and had the Chimbang(針房) which assist doctor in the system of Yagchun(藥典制度). 3. The medical interchange with China made the Three Kingdoms to import the medical books. So the theory of medicine was systematized and the art of treatment developed. In the aspect of Herb the Three Kingdoms and China actively exchange their own district product. 4. The medicine of Three Kingdoms accommodated Yin Yang Ohang theory(陰陽五行說), the theory of body compose with four element(四大 : 地水火風) and the theory of life cultivation and breathing(導引養生說) with Therefore in many aspect of oriental medicine basic theory and treatment would improved. 5. The epidermic diease occurred in period of Three Kingdoms, is represented Yeok(疫), that is after all Ohn Diease(溫病), and epidermic diease, is relfected by earthquake, heavy rain, terrible droughty and eclipse of sun. The treatment of this diease did not developed in that time, we presume that there are many persons killed. 6. As the record of five starr(五星), comet(彗星) and eclipse of sun was showed, the astronomy of oriental medicine in the Three Kingdoms was high level and it became the mothers womb of Korean astronomy. 7. The medicine of the Three Kingdoms, concreted with Chinese medicine and their own ancient one, was reflect on Japanese medicine to improve the medical theory and treatment. 8. The Three Kingdoms peculiarly published Korea Nosabang(高麗老師方) Baekjyeo Shinjipbang(百濟新集方), so this independent medicine reflected on the development of natural hurb(鄕約) of the period of Korea(高麗).
We investigated 'Song of the Sky Pacers, Adopted to the New Methods'(新法步天歌), the latest version of Joseon's 'Song of the Sky Pacers'(步天歌). Due to the influence of new knowledge on Chinese asterisms imported from the Ching dynasty, 'Song of the Sky Pacers with New Star-Charts' was written in the eighteenth century. However, the disagreement between song and star-charts was causing confusion in practical applications such as Joseon's national examination for selecting astronomers. In order to improve this situation, Royal Observatory of the Joseon dynasty (觀象監) published 'Song of the Sky Pacers, Adopted to the New Methods' based upon star-charts and song in the Sequel of I-Hsiang-K'ao-ch'eng (欽定儀象考成續編). The New Song was edited by a middle-class professional astronomer Yi Jun-yang (李俊養), and corrected by a nobleman Nam Byeong-gil (南秉吉). We establish a brief biography of Yi Jun-yang. The New Song preserves the genuine characteristics of previous Joseon's Song including the format of title of each lunar mansion and description on the location of the Milky Way in the asterisms. The description of the Milky Way was newly written based on the data in volume 31 and 32 of the Sequel of I-Hsiang-K'ao-ch'eng.
Dunong(鈍翁), Yun-Ji had born by a concubine, and his dream didn't come true for the restraint of his social position, so he tried to train younger men. His writings still remain 4 volumes of "Dunongyeonsocheonjimundap" and "Dunongdongmongmundap(鈍翁童蒙問答)", which may be called its primer. "Dunongyeonsocheonjimundap" is written in question-and-answer form between Chal-Hye-Ja(察慧子) who has a meager knowledge and Sim-Gyeong-Ong(心耕翁) who search for the truth. It is progressed from the law of nature to human's cultivation of the mind so as to reconfirm the recognition of the unity between the heaven and human beings and lead the interpretation and practice of the metaphysical proposition. It is characterized by making use of metrical compositions to induce plain tone of argument. "Dunongdongmongmundap", whereas, uses archaic writings to describe natural science including astronomy to the beginners. Dunong's scholarship is characterized by these: He explained the metaphysical propositions by approaching usual things including oriental medicine practically; He comprised the Confucian concepts intensively to examine the Oriental studies closely; He groped for the outlooks on the world of taking serious view of human being or human body. And his medical thought is characterized by these: He attached importance to the theory of viscera and bowels based on yin-yang and five phase theory; He suggested the concrete yin-yang theory with a viewpoint of qi-blood theory; He considered the concept of 'six' only as mutual rooting of yin and yang and five visceras and six vowels, and denied the traditional six qi concepts; He explained the ghost theories of the metaphysics based on the yin-yang theory to analogize points of sameness between the oriental medicine and the metaphysics; He emphasized restore yang theory. Therefore, we can say that he regarded the human body as small heaven-earth and grafted the abstract propositions into the actuals so as to put the metaphysical propositions in practice.
Objectives: The three nations of far Northeastern Asia, namely China, Korea, and Japan, have developed a tradition of Asian medicine within a common cultural realm. Studying Japan's Yunqi not only helps our understanding of Japanese traditional medicine, but the course of development taken by the three nations' traditional Asian medicine as a whole. Methods: All books relating to Yunqi published in Japan were studied, with special focus on books that are especially more important. Results: It is assumed that Japan's first book on Yunqi is 吉田宗桂's Ungiileonjib. The Japanese mainstream study on Yunqi is the annotations and studies on Suwenrushiyungilunao, written by Liuwenshu. YunQiLunAoKouYiis the first annotation on Suwenrushiyungilunao and had the greatest impact. Yunqilunjujie is an annotation book written by a Confucian scholar, and Yunqilunaoshuchao an annotation book composed by a Confucian doctor who was a thorough expert on sinology and the annotations ranged greatly from medical books, Confucian books, historical books and hundred schools of books. Aotouyunqilun is the most slight in terms of annotations compared to other annotation books, and Yunqilunaoyanjie is special in that it writes with both Chinese characters and Japanese language in order to help easier understanding by the novice scholars. Conclusions: Suwenrushiyunqilunao includes astronomy, geography, delivery sound, calendar, the eight trigrams, the Twelve laws, Shier chen, Constellation of twenty eight, Thirty-six birds, and secret days, which is leading to further study in these fields. Suwenrushiyunqilunao also contains excerpts from Suwen Liujiecangxianglun to describe the algorithm of the operation of Sun and Moon, which is also leading a further study in the field.
Peifan Li;Tong Tong;Yusong Wu;Xin Zhou;Michael Zhang;Jia Liu;Yongxin She;Zuming Li;Yongli Li
Journal of Microbiology and Biotechnology
/
v.33
no.12
/
pp.1657-1670
/
2023
This study aimed to evaluate the effects of Limosilactobacillus fermentum and Lactiplantibacillus plantarum isolated from human feces coordinating with inulin on the composition of gut microbiota and metabolic profiles in db/db mice. These supplements were administered to db/db mice for 12 weeks. The results showed that the Lactobacillaceae coordinating with inulin group (LI) exhibited lower fasting blood glucose levels than the model control group (MC). Additionally, LI was found to enhance colon tissue and increase the levels of short-chain fatty acids. 16S rRNA sequencing revealed that the abundance of Corynebacterium and Proteus, which were significantly increased in the MC group compared with NC group, were significantly decreased by the treatment of LI that also restored the key genera of the Lachnospiraceae_NK4A136_group, Lachnoclostridium, Ruminococcus_gnavus_group, Desulfovibrio, and Lachnospiraceae_UCG-006. Untargeted metabolomics analysis showed that lotaustralin, 5-hydroxyindoleacetic acid, and 13(S)-HpODE were increased while L-phenylalanine and L-tryptophan were decreased in the MC group compared with the NC group. However, the intervention of LI reversed the levels of these metabolites in the intestine. Correlation analysis revealed that Lachnoclostridium and Ruminococcus_gnavus_group were negatively correlated with 5-hydroxyindoleacetic acid and 13(S)-HpODE, but positively correlated with L-tryptophan. 13(S)-HpODE was involved in the "linoleic acid metabolism". L-tryptophan and 5-hydroxyindoleacetic acid were involved in "tryptophan metabolism" and "serotonergic synapse". These findings suggest that LI may alleviate type 2 diabetes symptoms by modulating the abundance of Ruminococcus_gnavus_group and Lachnoclostridium to regulate the pathways of "linoleic acid metabolism", "serotonergic synapse", and" tryptophan metabolism". Our results provide new insights into prevention and treatment of type 2 diabetes.
Journal of the Korean Institute of Oriental Medical Informatics
/
v.17
no.2
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pp.130-287
/
2011
"zhenjiusunanyaozhi(鍼灸素難要旨)" is composed of three volumes and published in 1529 by Gao Wu(高武). Gao Wu(高武) is skillful in astronomy, the art of war and the law as well as a medical practitioner in Ming Dynasty. The books he wrote "zhenjiujuying(鍼灸聚英)", "zhizhi(直指)", "douzhenzhengzong(痘疹正宗)", "shexuezhinan(射學指南)", "zhenjiujieyao(鍼灸節要)". "zhenjiusunanyaozhi鍼灸素難要旨" is written by classifying the origin of acupuncture and moxibustion. In other words, it is edited by classifying the contents related to acupuncture and moxibustion out of the ancient Chinese medical book "yellow emperor's canon of medicine and yellow emperor eighty-one difficult" in which are composed of 3 volumes as follows, Volume 1 says the main diseases on "the nine acupuncture needles figure" (九針圖), "the reinforcing and reducing the meridian" (補瀉), "the needle depth" (針刺深淺), "the five shu points - metal, wood, water, fire, earth" (正,滎,輸,經,合) based on 18 chapters in terms of acupuncture in "yellow emperor eighty-one Difficult "難經"", in which it quotes the annotation of "the difficulty by the original meaning "難經本義"" written by Hua Shou(滑壽) in Yuan Dynasty. Volume 2 is composed of 2 parts. Part 1 says the method of treatment on 36 Chapters, the method of acupuncture use in the Linshu "靈樞" and the Suwen "素問" such as "the rule of acupuncture use" (用針方宜), "the nine-pin method" (九針式) and "the nine-pin to only use the time appropriate to consider nature of Heaven, Earth and person" (九針應天地人時以起用) etc., Part 2 says "the five difficult acupuncture(五亂刺)", "the rise and fall of energy and blood(氣血盛衰)". "the pain tolerance(耐痛)" and ect., in which are in terms of method of treatment collected the original texts of 59 chapters on acupuncture to each disease and of 8 chapters on moxibustion in the Linshu "靈樞" and the Suwen "素問". Volume 3 includes 10 chapters in which consist of "the stabbing to disease in 12 meridians (十二經病刺)", "the eight extra meridian disease (寄經八脈病)", "the twelve meridians(十二經脈)", "the fifteen collaterals (十五絡脈), the twelve meridian muscles (十二經筋)", "the acupoint (孔穴)" and etc. This is the book edited comprehensively by classifying the contents on the theory of acupuncture and moxibustion and the circulations of meridians in "yellow emperor's canon of medicine and yellow emperor eighty-one difficult" and there is no case story in particular except his comments in person. This study is for the purpose of helping researching and developing acupuncture and moxibustion and applying their clinical training.
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