• Journal of architectural history
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• v.20 no.5
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• pp.31-45
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• 2011

The purpose of this study is to understand the architectural space of Seungjeongwon (承政院), the Royal Secretariat, in the early years of Joseon Dynasty. The Royal palace can be divided into three parts, political space, living space for king and his family and offices for government official in the palace. So first, we should to understand the characteristics of each space in the Royal Palace. The result of this study is following. Seungjeongwon of the Joseon Dynasty was where Seungji (承旨), Juseo (注書), Sagwan (史官), Seungjeonsaeg (承傳色), Seori (書吏) and Harye (下隷) worked together. The architectural space of Seungjeongwon was separated into Jeongwon-Cheong (政院廳) and Juseo-Cheong (注書廳). Jeongwon-Cheong was the office for Seungji, where Sagwan worked as well as Seungji and Juseo. The form of Jeongwon-Cheong (政院廳) in Kyung-bok Palace was similar to that depicted in Eundaegyecheop (銀臺契帖), which was painted the meeting of Seungjis. Juseo-Cheong was the office for Juseo and Sagwan and there was a break room. Apart from Jeongwon-Cheong there were rooms where Seungji could work or take a rest. As with the office of Seungji, the space for Juseo also had rooms for Juseo. There were also rooms for Seori and Abang (兒房) which were rooms for servants.

• Journal for History of Mathematics
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• v.25 no.2
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• pp.1-9
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• 2012

After disastrous foreign invasions in 1592 and 1636, Chosun lost most of the traditional mathematical works and needed to revive its mathematics. The new calendar system, ShiXianLi(時憲曆, 1645), was brought into Chosun in the same year. In order to understand the system, Chosun imported books related to western mathematics. For the traditional mathematics, Kim Si Jin(金始振, 1618-1667) republished SuanXue QiMeng(算學啓蒙, 1299) in 1660. We discuss the works by two great mathematicians of early 18th century, Cho Tae Gu(趙泰耉, 1660-1723) and Hong Jung Ha(洪正夏, 1684-?) and then conclude that Cho's JuSeoGwanGyun(籌 書管見) and Hong's GuIlJib(九一集) became a real breakthrough for the second half of the history of Chosun mathematics.

• Journal of agriculture & life science
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• v.50 no.1
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• pp.273-281
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• 2016

In this study, after carrying out a bending test that targeted the frames of plastic film greenhouse, the load-displacement relationship was analyzed to be used as basic data to develop greenhouse construction and maintenance guidelines. As a result, regardless of the shapes of the specimen, the yield and the maximum load increased as the size of the specimen increased. The displacement also showed the same pattern. A steel pipe showed lower yield and maximum load than a square pipe, and the displacement was large. In the steel pipe case, the displacement under the yield and maximum load was in the range of approximately 1.42-4.20mm and 5.80-24.13mm, respectively. In the square pipe case, the displacement under the yield and maximum load was in the range of approximately 1.62-3.00mm and 3.13-8.01mm, respectively. Further, a large difference was observed between the result of this test and the values calculated by a conventionally provided standard. In particular, not much difference was found from the result of this test in the case of a purlin member from the values provided by previous researches. However, a large difference was observed in the column or main rafter members. Furthermore, when a wide-span and venlo type, which is a glasshouse, was used as a target(h/100 and h/80), the displacement under the yield and maximum load was approximately 28.0mm and 35.0mm, respectively, which showed a large difference compared with the Netherlands standard(14.0mm) of a glasshouse. Further, in the main rafter case, a large difference was observed in the displacement limit according to the width(i.e., span) of the greenhouse where members are used. Therefore, because the displacement limit can vary depending on various factors such as type, form, and size of a greenhouse, we determined that studies or tests that consider these factors should be carried out to reflect them in the construction and maintenance of greenhouses.

• (The)Study of the Eastern Classic
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• no.59
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• pp.297-324
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• 2015

This article discusses Dasan Cheong Yagyong(1762-1836)'s perspectives on The Book of historical documents("書經"). Dasan Cheong Yagyong considered The Shoo King as The Book of historical documents presented Ideas of Confucian Politics in ancient China. Many Scholar and Kings dispersed and re-edition The Shoo King as historical documents. Dasan Cheong Yagyong analyzed, de-constructed, and reinterpretations documents of dominant The Shoo King. Dasan Cheong Yagyong tried to recover the original documents The Shoo King. Dasan Cheong Yagyong collected dispersed material of The Shoo King, and complied the original documents. Dasan Cheong Yagyong wrote four book of The Shoo King. Dasan want to reconstruct the new theory by these reinterpretations of The Book of historical documents presented Ideas of Confucian Politics in ancient China, and to open new era.