Several NNW-trending Cretaceous rhyolite dikes in the northeastern Cheongsong area of southern Korea contain spherulitic fabrics and are locally quarried as an ornamental stone. The dikes, part of the Cheongsong dike ...Several NNW-trending Cretaceous rhyolite dikes in the northeastern Cheongsong area of southern Korea contain spherulitic fabrics and are locally quarried as an ornamental stone. The dikes, part of the Cheongsong dike swarm, contain a variety of spherulites which are characterized by radial array of acicular intergrowths from fibrous quartz and alkali feldspars. They are classified as some simple, multiple and compound spherulite types from flower-like patterns, and the types are different each other in spatial distribution within the dikes. The various radial fabrics suggest that they crystallized under the different cooling mechanisms and processes in rapidly cooling dikes. Spheroids lacking a flower-like pattern may be precipitated after compositional segregation in a supercooled magma. Simple acicular spherulites could be crystallized by devitrification of true glass which cooled rapidly below the transformation temperature, whereas layered multiple spherulites could result from a crystallization of supercooled magma at relatively rapid cooling rates above the transformation temperature. Acicular multiple spherulites could be produced from a combination of the above three mechanisms operating at slower cooling rates.展开更多
The monumental Studies to Fathom Principles(Qiongli xue窮理學;1683)by Ferdinand Verbiest S.J.(Nan Huairen南懷仁,1623–1688)was never printed,and its exact content is not known.A section of the only extant,though incom...The monumental Studies to Fathom Principles(Qiongli xue窮理學;1683)by Ferdinand Verbiest S.J.(Nan Huairen南懷仁,1623–1688)was never printed,and its exact content is not known.A section of the only extant,though incomplete,manuscript deals with fluvial flood prevention and river control measures,a subject that until then had not cropped up in any Chinese-language work of the Jesuits.In this section,Verbiest not only described the already well-known Aristotelian theory of the origin of rivers,but also introduced to China new scientific propositions,concepts,and numerical examples originating from the seminal Renaissance work Della misura dell’acque correnti(Of the Mensuration of Running Waters;1628)by Benedetto Castelli(1578–1643).In addition,Verbiest presented to his readers some noteworthy examples of pertinent Western achievements such as the pound-lock with miter gate,and he provided them with a simple economic analysis of flood control options.The significance and possible influence of Verbiest’s text on further developments in Chinese approaches to water engineering are discussed,highlighting a hitherto largely disregarded facet of Western science and technology transfer in the field of river hydraulics and flood management.展开更多
The harmonious relationship among East Asian countries has a very long history. However, it has faced serious challenges in the past hundred years. In these eventful years for our nation, Chinese literature, like the ...The harmonious relationship among East Asian countries has a very long history. However, it has faced serious challenges in the past hundred years. In these eventful years for our nation, Chinese literature, like the Chinese people, has endured hardships and pondered ways of extricating the country from its malaise. In addition to being concerned over China＇s enlightenment, salvation, independence and rejuvenation, writers have also paid considerable attention to important international forces that had a strong influence on their country＇s fate. Concern over and understanding of the Korean nation bad a particular emotional charge and relevance to their own fate. Over the course of a century, Chinese literature＇s awareness of Korea went through four stages. In the first, Korea＇s loss of independence served as a mirror of China＇s own dangerous position, menaced on all sides; in the second, the Korean people were seen as comrades-in-arms combating foreign foes; in the third, when the Korean Peninsula was divided, North Koreans continued to be regarded as comrades-in-arms while South Korea was not acknowledged; and in the final stage, amidst the interaction between ＂China style＂ and the ＂Korean wave,＂ Chinese literature＇s awareness of Korea expanded through a penetrating appreciation of Korean history involving deep ties of courage and uprightness.展开更多
文摘Several NNW-trending Cretaceous rhyolite dikes in the northeastern Cheongsong area of southern Korea contain spherulitic fabrics and are locally quarried as an ornamental stone. The dikes, part of the Cheongsong dike swarm, contain a variety of spherulites which are characterized by radial array of acicular intergrowths from fibrous quartz and alkali feldspars. They are classified as some simple, multiple and compound spherulite types from flower-like patterns, and the types are different each other in spatial distribution within the dikes. The various radial fabrics suggest that they crystallized under the different cooling mechanisms and processes in rapidly cooling dikes. Spheroids lacking a flower-like pattern may be precipitated after compositional segregation in a supercooled magma. Simple acicular spherulites could be crystallized by devitrification of true glass which cooled rapidly below the transformation temperature, whereas layered multiple spherulites could result from a crystallization of supercooled magma at relatively rapid cooling rates above the transformation temperature. Acicular multiple spherulites could be produced from a combination of the above three mechanisms operating at slower cooling rates.
基金funded by the German Research Foundation(DFG)for the years 2018 to 2022
文摘The monumental Studies to Fathom Principles(Qiongli xue窮理學;1683)by Ferdinand Verbiest S.J.(Nan Huairen南懷仁,1623–1688)was never printed,and its exact content is not known.A section of the only extant,though incomplete,manuscript deals with fluvial flood prevention and river control measures,a subject that until then had not cropped up in any Chinese-language work of the Jesuits.In this section,Verbiest not only described the already well-known Aristotelian theory of the origin of rivers,but also introduced to China new scientific propositions,concepts,and numerical examples originating from the seminal Renaissance work Della misura dell’acque correnti(Of the Mensuration of Running Waters;1628)by Benedetto Castelli(1578–1643).In addition,Verbiest presented to his readers some noteworthy examples of pertinent Western achievements such as the pound-lock with miter gate,and he provided them with a simple economic analysis of flood control options.The significance and possible influence of Verbiest’s text on further developments in Chinese approaches to water engineering are discussed,highlighting a hitherto largely disregarded facet of Western science and technology transfer in the field of river hydraulics and flood management.
文摘The harmonious relationship among East Asian countries has a very long history. However, it has faced serious challenges in the past hundred years. In these eventful years for our nation, Chinese literature, like the Chinese people, has endured hardships and pondered ways of extricating the country from its malaise. In addition to being concerned over China＇s enlightenment, salvation, independence and rejuvenation, writers have also paid considerable attention to important international forces that had a strong influence on their country＇s fate. Concern over and understanding of the Korean nation bad a particular emotional charge and relevance to their own fate. Over the course of a century, Chinese literature＇s awareness of Korea went through four stages. In the first, Korea＇s loss of independence served as a mirror of China＇s own dangerous position, menaced on all sides; in the second, the Korean people were seen as comrades-in-arms combating foreign foes; in the third, when the Korean Peninsula was divided, North Koreans continued to be regarded as comrades-in-arms while South Korea was not acknowledged; and in the final stage, amidst the interaction between ＂China style＂ and the ＂Korean wave,＂ Chinese literature＇s awareness of Korea expanded through a penetrating appreciation of Korean history involving deep ties of courage and uprightness.
