• Korean journal of applied entomology
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• v.48 no.4
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• pp.447-451
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• 2009

Locust gall midge (LGM), Obolodiplosis robiniae (Haldeman) (Diptera: Cecidomyiidae), is a cecidomyiid insect forming roll-up galls on leaves of Robinia pseudoacacia Linnaeus (Fabaceae). LGM, known as native to North America, was reported from Korea and Japan in 2002. LGM was observed weekly or biweekly to clarify their voltinism and distribution within the crown of the host tree in two sites of Osan and Siheung in Korea from May to August, 2007. Density of LGM was investigated based on the number of larvae per leaf. Two generations of LGM were observed in Siheung site whereas three generations in Osan site during the present study. The result indicated that LGM had at maximum three generations per year. The density of LGM in Osan was higher in the upper crown of the host trees than middle or lower part. In Siheung, LGMs were distributed more on the exterior of the lower crown than the interior. The average number of larvae per gall was $3.3{\pm}0.1$ and $2.8{\pm}0.1$ individuals per leaf in Osan and Siheung, respectively.

• Journal of Conservation Science
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• v.33 no.5
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• pp.331-344
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• 2017

In this study, glass beads from Osan Sucheong were classified according to color into 10 groups. Among these groups, reddish brown, bluish green, and purplish blue were identified as the main colors of glass beads based on their large quantities in Osan Sucheong. The glass beads of these main colors were then classified according to their chemical compositions and and looked at the changing process. Based on the results, reddish brown and bluish green glass beads can both be divided into five types, and purplish blue glass beads can be divided into four types. Furthermore, according to continuity of type, it was identified as the main attributes that the reddish brown beads belong to two types, whereas the bluish green and purplish blue each belong to one type. Based on a review of primary attributes, beads of these three colors were identified as soda glass and high-alumina glass. The results indicate that these beads came from a single, consistent route of origin into the region. However, it is possible that glass beads came through various routes into Osan Sucheong in the $4^{th}$ century, because many types of chemical compositions have been detected for beads from this time.

• Analytical Science and Technology
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• v.23 no.6
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• pp.511-517
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• 2010

Dissolution procedure of vanadium pentoxide, which is widely used as a catalyst for production of sulfuric acid or an oxide reaction of the numerous organic compounds, was investigated. Reagent of vanadium pentoxide was completely dissolved in aqua regia-$H_2O_2$-HF solution, but plate type of vanadium pentoxide sample was not clearly dissolved with mixed acids. Thus, in order to establish the dissolution procedure for plate type of vanadium pentoxide, the solubility of vanadium pentoxide was investigated through comparison of acid treatment-fusion and microwave digestion methods. The optimized acid for dissolution of vanadium compound was found to be mixing acids of aqua regia, $H_2O_2$ and HF. Acid-fusion and microwave digestion methods have a similar property in the solubility of vanadium compound, but the latter was more quick and convenient procedure. The content of vanadium pentoxide was found to be $97.9{\pm}0.9%$ using an inductively coupled plasma atomic emission spectrometer after dissolution of a sample with the microwave digestion system.

• Journal of Christian Education in Korea
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• v.68
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• pp.141-173
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• 2021

The purpose of this study is to help examine the nature and direction of today's village education community by examining the characteristics of Osan School and Myeongdong School, which were representative national schools during the Japanese colonial period, as village education communities. These two schools were prestigious private schools that became the bases for national and international independence movements at home and abroad. The fact that these schools were able to produce excellent graduates by faithfully carrying out the national education, which was the mission of the time, despite the oppressive situation, was influenced by the village education community formed by the organic cooperative relationship between the school and the village. The two schools have had active support from the village since their establishment, and the schools invited villagers if there was a good educational opportunity or cultural event. The school opened all the facilities of the school to the residents, and the villagers took care of the students and teachers, forming a close fusion between the two sides. Based on this relationship, the school and village made an effort to create an ideal village community based on independence, equality and solidarity. As such, the historical examination of Osan School and Myeongdong School suggests implications that help the village education community move forward to a more mature stage.

• Korean Architects
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• no.3 s.335
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• pp.99-115
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• 1997

을지로 2가 도심 재개발/대전도시철도 종합사령실/안산시 문화예술회관/고흥군종합문화회관/진해시청사/진주시청사/오산시 종합문화회관/안동한국국학진흥원/국방부 창동병원/내수구역 제3지구 도심재개발/광진구 도서관

• Proceedings of the KGS Conference
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• 2003.11a
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• pp.191-195
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• 2003

폼페이는 로마의 역사와 비교될 만큼 오래된 고대도시 중 하나일 뿐만 아니라, 고대 이탈리아 반도의 도시국가에서는 평범한 역사를 가진 도시였다. 이탈리아의 고대민족 중 하나였던 오스코족은 기원전 8세기에 캄파니아 지방의 베수비오산 기슭에 폼페이라는 취락을 건설하였다. 이 무렵, 그리스로부터 이주해 온 식민자는 도리아식 신전을 폼페이시 남부의 삼각포럼(그림 1의 제 VII지구 7구역)에 건설한 바 있다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2010.04a
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• pp.203-204
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• 2010

• 프린팅코리아
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• v.12 no.5
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• pp.48-57
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• 2013

인쇄사는 가족기업의 형태로 운영되는 경우가 매우 많다. 그렇다고 우리나라 인쇄사만 영세하고 가내수공업 같아 가족기업의 형태로 운영되는 경우가 많을 것이라고 생각하면 오산이다. 우리나라보다 훨씬 bah가 큰 미국의 인쇄사도 90% 이상이 가족기업이고, 심지어는 포츈지 선정 500e 기업의 37%가 가족기업에 해당된다는 통계도 있다. 이처럼 가족기업은 생각보다 훨씬 다양한 모습으로 산업계에 뿌리 내리고 있으며, 매우 우수한 경영성과를 올리고 있다.

• Computational Structural Engineering
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• v.19 no.4 s.74
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• pp.89-96
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• 2006

• 한국도로학회지:도로
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• v.18 no.4
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• pp.68-75
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• 2016