4,855 research outputs found

    Super-Resolution for Overhead Imagery Using DenseNets and Adversarial Learning

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    Recent advances in Generative Adversarial Learning allow for new modalities of image super-resolution by learning low to high resolution mappings. In this paper we present our work using Generative Adversarial Networks (GANs) with applications to overhead and satellite imagery. We have experimented with several state-of-the-art architectures. We propose a GAN-based architecture using densely connected convolutional neural networks (DenseNets) to be able to super-resolve overhead imagery with a factor of up to 8x. We have also investigated resolution limits of these networks. We report results on several publicly available datasets, including SpaceNet data and IARPA Multi-View Stereo Challenge, and compare performance with other state-of-the-art architectures.Comment: 9 pages, 9 figures, WACV 2018 submissio

    Low-temperature luminescence analysis of drugs and poisons

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    It is the aim of this work to extend the use of phosphorescence as an analytical technique to a number of different classes of drugs and to study any structure–spectral correlations existing between them. Part of the present work is directed towards developing a technique capable of scanning thin-layer chromatograms and measuring the phosphorescence of separated components in situ. The sensitivity of phosphorescence and separatory function of thin-layer chromatography could thus be combined to produce a rapid, sensitive method capable of resolving small quantities of similar compounds, especially drugs and their metabolites, from complex mixtures

    Tracking system study

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    A digital computer program was generated which mathematically describes an optimal estimator-controller technique as applied to the control of antenna tracking systems used by NASA. Simulation studies utilizing this program were conducted using the IBM 360/91 computer. The basic ideas of applying optimal estimator-controller techniques to antenna tracking systems are discussed. A survey of existing tracking methods is given along with shortcomings and inherent errors. It is explained how these errors can be considerably reduced if optimal estimation and control are used. The modified programs generated in this project are described and the simulation results are summarized. The new algorithms for direct synthesis and stabilization of the systems including nonlinearities, are presented

    Dreams, Twilight Dreams

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    https://digitalcommons.library.umaine.edu/mmb-vp/2863/thumbnail.jp

    Consular Discretion in the Immigrant Visa-Issuing Process

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    This study examines the exercise of discretion by consular officers in deciding whether to issue or refuse immigrant visas in an effort to determine if these decisions are arbitrary or unlawful. The study begins by examining the procedures and factors mandated by the Immigration and Nationality Act for use in determining eligibility to immigrate. The study then discusses and compares the typical procedures and eligibility factors utilized by consular offices in the field. Next the study does an evaluation of extra-statutory factors affecting the consular officer\u27s determination including personal background, the effect of intermediaries, lack of time, the promotion system, and attitudes towards applicants and the immigration policy. The study concludes by making recommendations for limiting the discretion of consular officers in deciding whether to issue or refuse immigrant visas

    If the Rose of my Dream, was You

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    https://digitalcommons.library.umaine.edu/mmb-vp/1819/thumbnail.jp

    Structure of vortices in rotating Bose-Einstein condensates

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    We calculate the structure of individual vortices in rotating Bose-Einstein condensates in a transverse harmonic trap. Making a Wigner-Seitz approximation for the unit cell of the vortex lattice, we derive the Gross-Pitaevskii equation for the condensate wave function in each cell of the lattice, including effects of varying coarse grained density. We calculate the Abrikosov parameter, the fractional core area, and the energy of individual cells.Comment: 10 pages, 9 figures, published versio
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