• Title/Summary/Keyword: Ando

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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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