• Title/Summary/Keyword: Co-works

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A Study on Automated Quantity Take-off Methods of Earth Works in Road Design using 3D Design Concept (3차원 설계를 통한 도로설계단계의 토공 자동물량 산정 방안에 관한 연구)

  • Cho, Myunhwan;Kim, Nakseok;Chae, Jae-Hyun
    • KSCE Journal of Civil and Environmental Engineering Research
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    • v.36 no.2
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    • pp.277-283
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    • 2016

  • Recently, the interests in three-dimensional design and BIM(Building Information Modeling) are increasing in civil engineering sector and the researches about three-dimensional design and quantity take-off methods for civil engineering structures have been conducted. However, these studies are just carried out the 3D design and quantity calculation of civil structures on the road or railway such as bridges and tunnels. The study on the quantity take-off methods and the evaluation of calculated results on the earth works should be performed in more detail. Based on these backgrounds in mind, the study was conducted the three-dimensional road design and evaluated the quantity take-off results on the earth works using 3D calculation method(average end area method, prismoidal method and composit method). The calculated quantity from composit method showed about 5% error of measuring efficiency than the average end area method, and when reporting the quantity calculation of earth works, it is necessary to specify the calculation method using quantity take-off of earth works.

  • https://doi.org/10.12652/Ksce.2016.36.2.0277 인용 PDF KSCI

Emission Profile Studies of Thermionic Cathodes and Field Emitters

  • Tawa, Yasuhiro;Kai, Junjiro;Tama, Masayoshi;Ijima, Kenji;Saito, Tsunenari
    • 한국정보디스플레이학회:학술대회논문집
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    • 2002.08a
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    • pp.371-375
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    • 2002

  • Emissions of thermionic cathodes and field emitters were studied using a cathode emission profiler which works based on the anode scanning method. Findings about impregnated cathodes in thermal activation and gas poisoning processes are shown. Effects of surface treatments for field emitters are studied from the viewpoint of emission profiles and characteristics of the emitters.

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A Study on Knowledge Network Analysis of Social System Theory: Focused on Follow-up Studies on Niklas Luhmann (사회적 체계 이론의 지식 네트워크 분석 연구 - Niklas Luhmann의 후속연구를 중심으로 -)

  • Park, Seongwoo;Hong, Soram
    • Journal of Korean Library and Information Science Society
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    • v.53 no.1
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    • pp.191-210
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    • 2022

  • Niklas Luhmann is a sociologist who has had a strong influence on other disciplines. Therefore, it is necessary to examine what Luhmann's theory has influenced on his subsequent researchers. This study analyzed the knowledge network of studies on Niklas Luhmann's theory by follow-up researchers. Bibliographic coupling and co-citation were used as the analysis method of knowledge network. The main results are as follows. First, the language clusters were divided into Latin American / Spanish-speaking regions, Western Europe / Anglo-American regions, Eastern / Northern Europe and other language regions through bibliographic coupling analysis. Second, from the node analysis of bibliographic coupling, It was divided into 2 main cases: where Luhmann's major works were cited; where Luhmann's minor works were cited. Third, it was found that there are the core work groups that are repeatedly cited among Luhmann's works. Fourth, 12 core works were derived from the node analysis of the co-citation network, and appeared in four groups according to themes.

  • https://doi.org/10.16981/kliss.53.1.202203.191 인용 PDF KSCI