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The Effectiveness of Life Cycle Assessment for Building Using Inventory Database "IDEA" in Japan

  • Yosuke TANAKA;Yoshiyuki SUZUKI;kensuke KOBAYASHI
    • International conference on construction engineering and project management
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    • 2024.07a
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    • pp.1137-1144
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    • 2024

  • Reducing the environmental impact in the construction industry is essential for a sustainable future, and life cycle assessment (LCA) should be effectively conducted to reduce the environmental impact. The construction industry is one of the fields that emits a large amount of Greenhouse Gas (GHG). It is also characterized by many material inputs and a one-off single production. Therefore, it took a lot of effort to evaluate all the input materials, and it was difficult to implement a detailed LCA. There is need to solve these problems and to establish a fair and reliable evaluation method. In order to solve this problem, it is proposed to establish a common rule for calculating environmental loads of buildings, such as carbon dioxide emissions. In addition, by effectively utilizing the Inventory Database for Environmental Analysis (IDEA) database, which is an inventory database developed in Japan. It can evaluate not only carbon dioxide but also various environmental substances, and analyze how the environmental impact is correlated with each building and its constituent materials. Furthermore, by analyzing the actual buildings of 83 projects, the differences in the tendency of building type and materiall was clarified. A database was constructed to help reduce the environmental impact during the early stages of construction project and for different types of buildings.

  • https://doi.org/10.6106/ICCEPM.2024.1137 인용 PDF

A CHARACTERIZATION OF THE NEARLY SIGN CENTRAL MATRICES AND ITS MINIMALLITY

  • Lee, Gwang-Yeon;Lee, You-Ho
    • Journal of applied mathematics & informatics
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    • v.14 no.1_2
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    • pp.225-235
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    • 2004

  • The sign central matrices were characterized by Ando and Brualdi. And, the nearly sign central matrices were characterized by Lee and Cheon. In this paper, we give another characterization of nearly sign central matrices. Also, we introduce the nearly minimal sign central matrices and study the properties of nearly minimal sign central matrices.

Retinal Projection Display for Low Vision Aid

  • Nakamura, Hajime;Ando, Takahisa;Shimizu, Eiji
    • 한국정보디스플레이학회:학술대회논문집
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    • 2002.08a
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    • pp.1009-1011
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    • 2002

  • We developed a Retinal Projection Display for a low vision aid. This device can be applied to a low vision whose visual sense is weak. In the device, a digital image was formed with spatial light modulator(SLM) and projected onto a retina with the Maxwellian View. The image on this display can be seen clearly without our ocular accommodation and a low vision can see it without correction of a refraction error.

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