• Geomechanics and Engineering
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• 제20권1호
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• pp.29-41
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• 2020

It is extremely important to obtain rock strength parameters for geological engineering. In this paper, the evolution of sandstone cohesion and internal friction angle with plastic shear strain was obtained by simulating the cyclic loading and unloading tests under different confining pressures using Particle Flow Code software. By which and combined with the micro-crack propagation process, the mesoscopic mechanism of parameter evolution was studied. The results show that with the increase of plastic shear strain, the sandstone cohesion decreases first and then tends to be stable, while the internal friction angle increases first, then decreases, and finally maintains unchanged. The evolution of sandstone shear strength parameters is closely related to the whole process of crack formation, propagation and coalescence. When the internal micro-cracks are less and distributed randomly and dispersedly, and the rock shear strength parameters (cohesion, internal friction angle) are considered to have not been fully mobilized. As the directional development of the internal micro-fractures as well as the gradual formation of macroscopic shear plane, the rock cohesion reduces continuously and the internal friction angle is in the rise stage. As the formation of the macroscopic shear plane, both the rock cohesion and internal friction angle continuously decrease to a certain residual level.

• 척추신경추나의학회지
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• 제9권2호
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• pp.1-9
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• 2014

Objectives : Many studies are being done in the method of experimental chuna science in China. The aim of this review is to understand and study the methods of experimental chuna science, focusing on the effects of chuna on circulatory system. Methods : We reviewed "實驗推拿學" and Chinese journals were searched using China National Knowledge Infrastructure(CNKI). Korean journals were searched using 3 Korean web databases(OASIS, NDSL, RISS). Results : By experimental chuna science, effect of chuna on blood pressure, cardiovascular system, hemorheologic system, blood flow velocity, circulation and lymphatic system were proved. Conclusions : Experimental chuna science is necessary for improvement of chuna to a higher level. In Korea, not many experimental studies are being done, especially in chuna and it has very narrow target diseases. For this reason we need to learn and adapt the methods of experimental chuna science of China.

• Asian Pacific Journal of Cancer Prevention
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• 제13권5호
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• pp.2185-2191
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• 2012

Background: Prevalence of Barrett's esophagus (BE) in Luoyang, China, has not been reported, and its pathogenesis is controversial. The aim of this study was therefore to investigate the prevalence of BE and its underlying factors in the city of Luoyang. Method: This was a prospective study in one center. Many patients were analyzed using endoscopy who showed upper gastrointestinal symptoms between August 2006 and June 2007. In addition, the effect of apoptosis-related proteins and heat shock proteins upon BE's pathogenesis were also investigated by an immunohistochemical protocol. Results: Prevalence of BE was at 4.55% and the mean age of those affected was about 10 years older than for esophagitis. Typical reflux symptoms were significantly lower than with esophagitis, whereas signs of caspase-3 and HSP105 elevation were significantly higher. Expression of TERT, HSP70 and $HSP90{\alpha}$ in BE cases was significantly lower than in esophagitis. However, there was no statistical difference between the two groups in expression of HSP27. Conclusions: The prevalence of BE is high in Luoyang, which could result from esophagitis despite typical reflux symptoms being relatively uncommon. Initiation and development of BE might be the result of accelerated proliferation, apoptosis and differentiation of original cells to intestinal epithelium.

• 한국생활과학회지
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• 제13권4호
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• pp.617-623
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• 2004

This research studies how a rain coat (兩衣) had developed in ancient China by searching through historic records. It can be said that people in ancient China wore two kinds of rain coats: straw coat and oiled-cloth coat (油衣). Straw coat was originally used in the Spring and Autumn and Warring States period. Then, people used natural grasses to make it. As the overall production had increased, various kinds of rain coats began to appear in Tang (唐) Dynasty, and the straw coat itself became elaborate. In Song (宋) and Yuan (元) Dynasty, the straw coat was used for the army, and when it came to be Ming (明) and Qing (淸) age, wearing it was considered a symbol of hermit. The straw coat shows the early form in the history of clothing, which was mostly put on by the poor. The material for straw coat was the grass which grows up in wet land area. People in the city and in the country had worn the straw coat for a long time. As foreign cultures were introduced, however, it disappeared first in cities and later in the country. The oiled-cloth coat was another of the kind. Its major material was water-proofed silk in the Qin(泰) and Han(漢) Dynasty. Also, it was a favorite of an emperor or aristocrats. Common people put on straw coat until the time the western rain coat was introduced and accepted in Qing Dynasty.

• Mycobiology
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• 제47권4호
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• pp.401-407
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• 2019

Two new species of the lichen genus Placolecis are discovered in China, namely P. kunmingensis An. C. Yin & Li S. Wang and P. sublaevis An. C. Yin & Li S. Wang. The new combination P. loekoesiana (S.Y. Kondr., Farkas, J.J. Woo & Hur) An. C. Yin is proposed. Placolecis kunmingensis is characterized by having simple, spherical or ellipsoid, hyaline spores, and pear-shaped pycnidia; while P. sublaevis can be distinguished by its thallus forming larger aggregations with slightly flattened lobes at the thallus margin, and urn-shaped pycnidia. Descriptions, a phylogenetic tree and a key are provided for all the known Placolecis species in China.

• 대기
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• 제26권2호
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• pp.289-299
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• 2016

Optical properties of aerosols associated with haze events over Seoul were examined using ground-based skyradiometer and satellite-borne CALIOP and MODIS measurements over the 2009~2010 period. It is shown that aerosol optical thickness (AOT), ${\AA}ngstr{\ddot{o}}m$ exponents (${\alpha}$), and fine-mode particles increase during the haze events. The CALIOP-measured vertical profiles of aerosol during the haze events revealed that most of aerosols are loaded within layers below 4 km altitude. A large portion of these events appear to be related to the long-range transport of aerosols from China; about 35% and 18% of the haze events observed over Seoul were traced back to northern China and southern China, respectively. Compared with optical properties for locally-induced haze events (25%), these long-range transported aerosols are found to have relatively higher AOTs.

• 척추신경추나의학회지
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• 제8권2호
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• pp.47-56
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• 2013

Objectives : Many studies are being done in the method of experimental chuna science in China. The aim of this review is to understand and study the methods of experimental chuna science, focusing on the effects of chuna on nervous system. Methods : We reviewed "實驗推拿學"(experimental tuina science) and Chinese journals were searched using China National Knowledge Infrastructure(CNKI). Korean journals were searched using 3 Korean web databases(OASIS, NDSL, RISS). Results : By experimental chuna science, analgesic effect of chuna, therapeutic action of chuna on stroke, therapeutic action on polio, effect of modulating autonomic nerves of chuna and effect of modulating thermoregulatory centers of chuna were proved. Conclusions : Experimental chuna science is necessary for development of chuna to a higher level. In Korea, not a lot experimental studies are being done, especially in chuna. For this reason we need to learn and adapt the methods of experimental chuna science of China.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권1호
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• pp.16-33
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• 2019

In this paper, a full-duplex NOMA relaying based underlay device-to-device (D2D) communication scheme is proposed, in which D2D transmitter assists cellular downlink transmission as a full-duplex relay. Specifically, D2D transmitter receives signals from base station and transmits the superposition signals to D2D receiver and cellular user in NOMA scheme simultaneously. Furthermore, we investigate the power allocation under the proposed scheme, aiming to maximize D2D link's achievable transmit rate under cellular link's transmit rate constraint and total power constraint. To tackle the power allocation problem, we first propose a power allocation method based on linear fractional programming. In addition, we derive closed-form expressions of the optimal transmit power for base station and D2D transmitter. Simulation results show that the performance of two solutions matches well and the proposed full-duplex NOMA relaying based underlay D2D communication scheme outperforms existing full-duplex relaying based D2D communication scheme.

• 한국의사학회지
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• 제31권2호
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• pp.9-16
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• 2018

Eoyakwonbang is a collection of prescriptions of Yuyaoyuan, an imperial medical bureau of China. While the first edition of this book does not exist at present, two versions printed in Korea, and one printed in Japan, which is the well-known Gyesasingan Eoyakwonbang have been passed down. Eoyakwonbang is a meaningful text for the history of medical communication between China, Japan and Korea, but research on the different versions and contents of Eoyakwonbang have been insufficient. Out of the 2 versions published in Korea, Eulheja Eoyakwonbang is different from Gapjinja Eoyakwonbang [another version in Korea] and Gwanjeong Eoyakwonbang of Japan, in that the prescriptions are organized, the ingredients are organized according to the amount of each ingredient for each formula, and the amounts are recorded in an accurate manner. On the other hand, the Gapjinja version has many mistakes in the characters and content. The Gwanjeong version has lesser mistakes in characters, but repeats the content error of the Gapjinja version. Eulheja was printed after correction based on the original version or unknown version from China. Gapjinja was re-printed based on the Gyesasingan version, while Gwanjeong seems to have used the Gapjinja version as its original script, as the mistakes made in the Gapjinja version are repeated in the Gwanjeong version as well.

• 중국학논총
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• 제62호
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• pp.71-84
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• 2019

Brothel in China is another word of origin and a noble expression at the same time. Brothel has long been used as a symbol of prestige and wealth as a synonym for integrity innocence. According to documentary records, brothel was used as a place where people with a lot of power and wealth. This meaning in the literature continued until the Late Tang period. In addition, the brothel was also used to refer to the place where the King resides. Therefore, the meaning of Brothel in the Tang period is generally understood as a place where people with high status symbolize the integrity of innocence. However, the image of the brothel, which is connected to the characteristics of a lot of young and beautiful women is increasingly recognized as a place where young ladies reside. For this reason, entering the Tang period the brothel eventually turned into a dwelling of a young woman in a prestigious and wealthy house. Since the time of Ming-Qing, brothel has already been used to refer to prostitute and brothel. In this article, we will look at the historical process of the change of brothel, and examine the process of brothel culture through the environment of brothel and cultural literacy of residents. We hope that this study will provide new perspectives and data to the study of women's cultural history in China.