1,721,035 research outputs found
Minsun KIM, Sungyeon JANG, Sungho JANG, Dae-Kyun IM, Taek Jin KANG, Min-Kyu OH, Gyoo Yeol JUNG
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Development of a Robust and Multiplex Method for Genotyping Single-Nucleotide Polymorphisms
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Systematic strategies for tuning L-tryptophan RNA sensor for versatile application in Escherichia coli
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Novel Tuning Strategies of L-Tryptophan Riboswitch for On-demand Application in Escherichia coli
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Hyper-sensitive Multiplex RNA Quantification and Detection System for Diagnosis Based on CE-SSCP
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Generating Highlight Videos of a User-Specified Length using Most Replayed Data
No full textA highlight is a short edit of the original video that includes the most engaging moments. Given the rigid timing of TV commercial slots and length limits of social media uploads, generating highlights of specific lengths is crucial. Previous research on automatic highlight generation often overlooked the control over the duration of the final video, producing highlights of arbitrary lengths. We propose a novel system that automatically generates highlights of any user-specified length. Our system leverages Most Replayed Data (MRD), which identifies how frequently a video has been watched over time, to gauge the most engaging parts. It then optimizes the final editing path by adjusting internal segment durations. We evaluated the quality of our system’s outputs through two user studies, including a comparison with highlights created by human editors. Results show that our system can automatically produce highlights that are indistinguishable from those created by humans in viewing experience
Enhancement of photocatalytic activity of titania-titanate nanotubes by surface modification
No full textHydrothermally prepared titanate nanotubes are known to be thermodynamically unstable and to be easily transformed to the titania phase by heat or acid treatment, which is accompanied by the destruction of the nanotube structures. Surface modification of titanate nanotubes is expected to retard the phase-transition reactions from titanate nanotubes to titania nanoparticles. In this study, we investigated the effects of surface modifications, such as fluorination or phosphation, on the phase-transition reactions of hydrothermally prepared titanate nanotubes under acidic conditions. After acid treatment, surface-modified titanate nanotubes maintained their nanotube structures, and spherical nanoparticles were partially formed in the titanate nanotubes. Unmodified titanate nanotubes, however, changed to elongated nanostructures and spherical nanoparticles. The surface modifications also strongly affected the crystalline phases and increased the BET surface area. The photocatalytic activities for methylene blue degradation and gaseous CH 3CHO oxidation were strongly enhanced by the surface modifications. These effects were attributed to the anatase crystalline phase and the high surface area. Therefore, these surface modifications are useful methods to improve the photocatalytic activities of titanate nanotubes. © 2012 Elsevier B.V.1
Effects of hydrothermal temperature and acid concentration on the transition from titanate to titania
No full textNanostructured titanates were prepared by alkaline hydrothermal processing. The titanates were transformed to the anatase particles at low concentrations of acid, whereas the rutile rods were produced from the titanates at high concentrations of acid. These changes were more retarded in the titanate nanofiber product than in titanate nanotubes product, which could be attributed to the stability and high crystallinity of the titanate nanofiber product prepared at a high hydrothermal temperature. The photocatalytic activities of the acid treated nanostructured titanates for MB degradation and gaseous CH 3CHO oxidation were strongly dependent on the presence of the anatase crystalline phase. © 2012 The Korean Society of Industrial and Engineering Chemistry.1
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