• Journal of East-Asian Urban History
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• 제2권1호
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• pp.27-63
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• 2020

The emergence of coffee shops and other public spaces in modern Shanghai shows the appearance of the "mass" centered on the middle class. Furthermore, we can further explore the different development paths of the publicity of modern Chinese urban society. The emergence of new public leisure spaces, such as cafes, provides a model of modern life style and a stage of daily publicity for the middle class in Shanghai. With the convenience provided by this kind of public space, people are able to clean up their old opinions and be better at accepting new ideas. A more sensitive and flexible public opinion of Enlightenment has gradually formed in urban life.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제3권1호
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• pp.41-46
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• 2022

Psalidoremus is one of the subgenus which consists of five species and eleven subspecies through Taiwan, Japan, Korea and north eastern part of China which present strong endemism to their distribution. While most of advance studies focus on the new species or subspecies from this taxon, this paper suggests paleogeographical assumption and hypothesis of how they diverged from common ancestors. Phylogeographical patterns illustrated by the distribution of five species, which including Prosopocoilus inclinatus, Prosopocoilus hachijoensis, Prosopocoilus dissimilis, Prospocoilus pseudodissimilis, Prosopocoilus motschulskii respectively, has been assessed in this research. Speciation history is suggested by morphological tendencies especially in male mandibles with assumption from geographical patterns of under sea level.

• 천문학회보
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• 제46권1호
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• pp.53.1-53.1
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• 2021

Dwarf galaxies are the most abundant objects in the universe. Hence, understanding the dwarfs is important but relatively little is known due to the lack of computing power and limitations in the telescope resolution. We thus use the state-of-the-art NewHorizon simulation, which is a set of cosmological hydrodynamical simulations, to dissect the quenching mechanism working on dwarf galaxies by inspecting the star formation and mass history of individual galaxies. It is known that internal (AGN, SN, stellar feedback) and external (major and minor mergers, ram pressure stripping, strangulation) mechanisms affect the quenching of dwarfs. Because of the combination of these mechanisms, periodicity in the star formation history of the dwarf galaxies is expected. To check for their periodicity, Fourier transform was performed on the star formation history. By comparing the physical timescales and the periodicity, we determine the dominant effect working on the dwarfs. Then, we compare the dominant effects working on the galaxies according to their varying properties.

• 한국의사학회지
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• 제36권1호
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• pp.73-88
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• 2023

This article examines the trend of research on mathematical modeling of Yin-Yang and the Five Elements. Through the search engine Google and the library search service of Kyung Hee University, papers that mathematically studied the Yin-Yang Five Elements were searched. Among them, 7 cases published in academic journals were selected and briefly mentioned in the table. And we introduced specific details about four of them. The model format expressing the five elements as a nonlinear system of differential equations was discussed and evaluated.

• Communications for Statistical Applications and Methods
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• 제15권5호
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• pp.737-752
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• 2008

오차에 대한 분석은 18세기 천문학과 측지학에서 시작된 뒤, 19세기 초 가우스와 라플라스에 의해 정규분포 및 최소제곱법과 결합되면서 오차이론이라고 불리기 시작하였다. 19세기 중엽 벨기에의 케틀레는 자연과학의 관측결과를 분석하는데 쓰이던 오차이론을 사회 데이터에 적용함으로써 사회 연구를 보다 더 과학적인 연구로 만들어보려 하였다. 그는 사회데이터에서 개인의 특수성을 배제하고 집단의 보편적인 사실만을 나타내는 '평균적인 사람'이라는 개념을 만들었다. 또 그는 비슷한 조건에 있는 여러 사람을 측정한 결과는 단일한 대상을 반복측정한 결과와 마찬가지라고 보고, 천문학의 오차이론을 사회데이터에 적용하였다. 이 논문에서는 오차와 정규분포가 사회 연구에 도입되면서 새로이 나타난 개인과 집단의 관계를 비롯하여 오차이론에 대한 반대 의견들, 오차를 대신하여 나타난 용어 등을 중심으로 19세기 중반에 통계학의 영역이 확대되는 과정을 살펴보았다.

• Journal of Astronomy and Space Sciences
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• 제31권3호
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• pp.215-223
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• 2014

In this paper, we report the analysis of Korean historical records on the periodic Halley's comet according to the period (i.e., the Three Kingdoms, Goryeo Dynasty, and Joseon Dynasty) using various sources such as the Samguksagi (The History of the Three Kingdoms), Goryeosa (The History of the Goryeo Dynasty), and Joseonwangjosillok (The Annals of the Joseon Dynasty). With regards to the apparition time of the comet for each return, we referred to the works of Kronk. For the Three Kingdoms period, we could not find any record relevant to Halley's comet from the Samguksagi. Furthermore, we examined the suggestion that the phenomenon of "two Suns" which appeared on April 1, 760 (in a luni-solar calendar), as recorded in the Samgukyusa (The Legends and History of the Three Kingdoms), indicates an instance of the the daytime appearance of Halley's comet. In contrast with the Three Kingdoms period, we found that all returns of Halley's comet are recorded during the Goryeo Dynasty, although others have questioned some accounts. We also found that the appearance of Halley's comet in 1145 is mentioned in a spirit-path stele made in 1178. For the Joseon Dynasty period, we found that all apparitions of the comet are recorded, as with the Goryeo Dynasty, except for the return of 1910, at which time the former dynasty had fallen. In conclusion, we think that this study will be helpful for understanding Korean historical accounts on Halley's comet.

• 한국수학사학회지
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• 제20권1호
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• pp.17-32
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• 2007

이 논문에서는 19세기 초에 영국 케임브리지 대학에서 나타났던 '해석학회'를 중심으로 18세기 후반에서 19세기 전반까지의 영국 수학계의 상황을 살펴볼 것이다. 이를 통해 흔히 매우 새롭고 혁신적인 사건으로 언급되는 해석학회의 등장이 19세기 이전 영국 수학계의 꾸준한 개혁 노력들이 축적된 결과 나타날 수 있었음을 보일 것이다. 그 결과 해석학회의 역할과 의의에 대해 새롭게 이해할 수 있게 될 것이다. 또한 이후 영국에서 해석적 방식이 받아들여졌던 과정과 그 경로를 통해 새로운 해석적 방식이 당시 영국의 독특한 지적, 사회적 상황 속에서 대륙과는 다른 방식으로 발전했던 과정을 이해할 수 있을 것이다.

• 대한가정학회지
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• 제28권3호
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• pp.1-12
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• 1990

Though many thousands years of long history of Korea, many changes have taken place in politics, economy, culture, religion, arts and science, but the writer, in this thesis, has traced historical development of footwear that common people use as one of necessities of human life. Since the footwear is included in clothing, the history of footwear may be also traced along with the history of clothing. In the beginning, the shoes were only made to serve the purpose of protection of feet. As time passed by, the purpose gradually developed the skill in making shoes. Taking a historical of straw and hemp into consideration, I have studied on shoes using straw and hemp in this thesis. The history of straw and hemp can be retroacted to the beginning stage of the human culture. These straw and hemp have been developed over and over again for long time and it has its own distintion inquality so that these refined products used by noble men and these careless ones were used by the common people. In Japan, these straw and hemp were effected by the influence of typical continental climate, made characteristic shape. Since 1930s rubber shoes were introduced to Korea and traditional Korean shoes came to disappear in Korean market. Because of this, we now can see the traditional Korean shoes only in the windows of Museum.

• 한국의사학회지
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• 제31권1호
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• pp.43-55
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• 2018

This is a review of Juchon (舟村) Sinman's (申曼) book "Juchonsinbang (舟村新方)", describing generations of clinical experience in pediatric practice. Written during King Sukjong era in the middle of the Joseon Dynasty, JuchonSinman used symptoms and general disease terminology, including prescription and treatments employed over generations, so the public could easily utilize the information. "Juchonsinbang (舟村新方)" "pediatric (小兒編)" is characterized by a symptom differentiation method of prescribing herbs which allowed the reader to add or subtract various substances according to symptoms based on Tongchibang (通治方). "Juchonsinbang" includes unique prescriptions and new ways to distinguish acute infantile convulsion (急驚風) according to the cause of fright. Although these prescriptions were not completely new, they present an aspect of an empirical book including JuchonSinman's clinical experience based on existing medical theories. "Juchonsinbang" has a medico-historical value in that it was cited in many medical books such a "Danbangsinpyun (單方新編)", "Sujinggyunghumsinbang (袖珍經驗神方)", and "Hanbang medical pediatric book (漢方醫學小兒全科)" in 1910-30.

• Journal of Mechanical Science and Technology
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• 제19권2호
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• pp.549-557
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• 2005

The requirements of multi-resolution models of feature-based solids, which represent an object at many levels of feature detail, are increasing for engineering purposes, such as analysis, network-based collaborative design, virtual prototyping and manufacturing. To provide multi-resolution models for various applications, it is essential to generate adequate solid models at varying levels of detail (LOD) after feature rearrangement, based on the LOD criteria. However, the non-commutative property of the union and subtraction Boolean operations is a severe obstacle to arbitrary feature rearrangement. To solve this problem we propose history-based Boolean operations that satisfy the commutative law between union and subtraction operations by considering the history of the Boolean operations. Because these operations guarantee the same resulting shape as the original and reasonable shapes at the intermediate LODs for an arbitrary rearrangement of its features, various LOD criteria can be applied for multi-resolution modeling in different applications.