Browsing by Author "Srinivas, S."

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    Compounded fuzzy entropy-based derivation of uncertain critical factors causing corrosion in buried concrete sewer pipeline
    (Nature Research, 2025) Wani, T.I.; Srinivas, S.; Singhal, A.; Robert, D.; Kodikara, J.; Pramanik, B.K.; Arya, S.B.
    Corrosion in buried concrete sewer pipelines remains a critical challenge for infrastructure sustainability, driven by the complex interplay of environmental, material, operational, pipe-related, and physical factors with inherent uncertainty and interdependency, aspects often overlooked previously. This study introduces a novel compounded fuzzy entropy-based approach to systematically prioritize critical corrosion-inducing factors, integrating environmental (H?S, pH, humidity, temperature, O?), material (cement content, alkalinity, w/c ratio, porosity, permeability), pipe-related (age, length, diameter, depth, slope), operational (flow velocity, water pressure, hydraulic energy loss, sewage residence time, sewer type), and physical (soil type, corrosivity, moisture, groundwater level, external load) factors. Results identify H?S (0.2073), pH (0.2055), humidity (0.2031), pipe age (0.2039), length (0.2019), cement content (0.2026), alkalinity (0.2015), water pressure (0.2073), flow velocity (0.2043), soil type (0.2042), and soil corrosivity (0.2025) as the most influential contributors, enabling targeted corrosion mitigation strategies and enhancing infrastructure resilience. © The Author(s) 2025.
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    Multiple Order and Broadband Optical Orbital Angular Momentum Source using a Single Photonic Crystal Device
    (Institute of Electrical and Electronics Engineers Inc., 2020) Yadunath, T.R.; Ravindran, R.; Hegde, G.; Das, P.P.; Srinivas, S.
    A promising optical integrated circuit device design for the generation of broadband, low order OAM modes with topological charges of +1 and +2 is successfully conceptualized using a combination of ring and point defect in thin photonic crystal slab structure with circular array of holes. © 2020 IEEE.
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    Ultra-broadband fabrication-tolerant mode division (de)multiplexer on thin film Lithium niobate
    (Elsevier B.V., 2020) Kaushalram, A.; T.r, Y.; Das, P.P.; Hegde, G.; Srinivas, S.
    Mode division (de) multiplexers based on asymmetric directional coupler are designed and analysed on the emerging thin film lithium niobate platform in rib, buried and strip waveguide configurations. Rib configuration offers a large bandwidth of ?215 nm with a crosstalk level lower than ?10 dB, and provides a large fabrication tolerance of ±50 nm. Strip configuration exhibits a better crosstalk of ?19.7 dB at the design wavelength of 1550 nm, and has a reasonable fabrication tolerance of ±30 nm. Performance of (de) multiplexers on all three waveguide configurations are analysed in terms of modal crosstalk, mode conversion efficiency, bandwidth, along with fabrication tolerance to width and sidewall angle. The influence of electro-optic effect on the coupling length of lithium niobate mode multiplexers is also investigated. © 2020 Elsevier B.V.