1,722,286 research outputs found

    Large N dualities and transitions in geometry

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    This chapter is based on lectures given by the first author in May 2001 in Como. The second author attended the lectures and volunteered to help write the notes; in the end MR completely wrote sections 9.2.2, 9.2.3 and the appendices, which were only sketched in the lectures

    On minimal models of elliptic threefolds

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    Constructions of Minimal Models of Elliptic Threefolds, Descriptions of the possible base

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Defocussing Estimation for Obstacle Detection on Single Camera Smartphone Assisted Navigation for Vision Impaired People

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    An efficient application has been developed to detect close obstacles using a single smartphone camera and give speech information to vision impaired people. The proposed algorithm uses a simple technique aimed at measuring the local estimated image defocussing to roughly estimate its closeness to the camera. Preliminary results of the developing system are presented
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