Browsing by Author "Priyanka R"

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    EVALUATION OF MICROSTRUCTURAL, OPTICAL, VIBRATIONAL PROPERTIES AND PHOTOCATALYTIC ACTIVITY OF CDO NANOSTRUCTURE
    (Elsevier, 2022-11-15) Prakash T; Priyanka R; Siranjeevi R; Ranjith Kumar E; Arunadevi N; Salman S Alharthi
    Microwave irradiation was used to prepare the CdO nanostructure for photocatalytic activity. The X-ray diffraction profile after 600 °C annealing confirms the phase transition from monoclinic Cd(OH2) to CdO cubic structure. The typical crystallite sizes of the prepared and annealed nanoparticles are 34 nm–52 nm. The presence of functional groups in the samples is supported by vibrational studies. The optical band gap of as-prepared and annealed samples was calculated using UV spectra. It was discovered to be 3.06 eV for the as-prepared sample and 2.17 eV for the annealed sample. Photoluminescence measurement was selected to study the optical performance of CdO nanoparticles. They confirm the green emission at 522 nm. The morphological and elemental analyses of the CdO nanostructure were recorded using scanning electron microscopy and transmission electron microscopy. The spherical-shaped CdO nanostructures with a uniform size distribution are clearly visible in scanning electron micrographs. TEM micrographs confirm the size of the spherical shaped particles is 50 nm. Using the energy dispersive spectrum, the expected percentages of elements Cd and O were determined. The photocatalytic activity of CdO nanoparticles was tested using methylene blue and rhodamine B.
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    EVALUATION OF MICROSTRUCTURAL, OPTICAL, VIBRATIONAL PROPERTIES AND PHOTOCATALYTIC ACTIVITY OF CDO NANOSTRUCTURE
    (Elsevier, 2022-11-15) Prakash T; Priyanka R; Siranjeevi R; Ranjith Kumar E; Arunadevi N; Salman S, Alharthi
    Microwave irradiation was used to prepare the CdO nanostructure for photocatalytic activity. The X-ray diffraction profile after 600 °C annealing confirms the phase transition from monoclinic Cd(OH2) to CdO cubic structure. The typical crystallite sizes of the prepared and annealed nanoparticles are 34 nm–52 nm. The presence of functional groups in the samples is supported by vibrational studies. The optical band gap of as-prepared and annealed samples was calculated using UV spectra. It was discovered to be 3.06 eV for the as-prepared sample and 2.17 eV for the annealed sample. Photoluminescence measurement was selected to study the optical performance of CdO nanoparticles. They confirm the green emission at 522 nm. The morphological and elemental analyses of the CdO nanostructure were recorded using scanning electron microscopy and transmission electron microscopy. The spherical-shaped CdO nanostructures with a uniform size distribution are clearly visible in scanning electron micrographs. TEM micrographs confirm the size of the spherical shaped particles is 50 nm. Using the energy dispersive spectrum, the expected percentages of elements Cd and O were determined. The photocatalytic activity of CdO nanoparticles was tested using methylene blue and rhodamine B.
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    INTEGRATING DYNAMIC ARCHITECTURE WITH DISTRIBUTED MOBILITY MANAGEMENT TO OPTIMIZE ROUTE IN NEXT GENERATION INTERNET PROTOCOL MOBILITY
    (Indian Society for Education and Environment, 2015-05) Senthilkumar Mathi; Lavanya M; Priyanka R
    Increasing population of mobile users has lead to the demand of higher mobility support. Many protocols have been standardized for mobility management such as Mobile Internet Protocol version 6, hierarchical mobile IPv6 and proxy mobile IPv6 and so on. The predominantly used approach in the existing mobile networks is the centralized mobility management. In this, the messages transferred between mobile node and correspondent node must pass through each level due to the hierarchical architecture. When a mobile network is implemented with the centralized architecture, the messages are routed to the MN irrespective of its location using mobile IP for continuing services during the handover. But this approach is susceptible to issues such as single point of failure, non-optimized routes, latency issues, wastage of resources and security threats which affect the performance and scalability, demanding a flatter architecture with an efficient mechanism to face the traffic overload from the mobile users. Hence, the paper proposes a new scheme to form a flatter architecture by distributing the mobility management functionalities as distributed access point at the access level. The resistance against security threat such as man-in-the-middle attack, replay attack and false binding update attack has been achieved. Finally, numerical results show that the proposed scheme provides significant reduction in signaling cost and improves efficiency in route optimization