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Context-aware Damage Detection in Bridge Bearing using Lightweight Network, CGNet
( Tanveer Muhammad ),( Kim Byunghyun ),( Cho Soojin ) 한국구조물진단유지관리공학회 2022 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.26 No.1
Deep learning algorithms including semantic segmentation models have various applications in civil engineering to detect damages in all structures. The purpose of this study is to use lightweight semantic segmentation model for pixel wise damages detection in the bridge bearings irrespective of any background conditions. CGNet is a lightweight model as compared to other encoder-decoder model as it does not use any backbone network for classification. It gathered contextual information using a context guided block that helps to improve the accuracy and predict the damages pixelwise.
Tanveer A. Gadhi,Simelys Hernández,Micaela Castellino,Angelica Chiodoni,Thomas Husak,Gabriele Barrera,Paolo Allia,Nunzio Russo,Alberto Tagliaferro 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.63 No.-
A simple synthesis route is presented to obtain single BiFeO3 and mixed BiFeO3/Fe2O3/Bi2Fe4O9 photocatalysts. The obtained samples were characterized to analyze their structural, magnetic, optical and physical–chemical properties. The role of additional phases, i.e. Bi2Fe4O9 and Fe2O3 in the BiFeO3 structure, was analyzed by investigating sunlight-driven water oxidation and degradation of different dye pollutants. The achieved results suggest formation of BiFeO3/Fe2O3/Bi2Fe4O9 heterojunction-like interfaces, that induce lower e−/h+ recombination rate, thus enhancing photoactivity than bare BiFeO3. Additionally, BiFeO3/Fe2O3/Bi2Fe4O9 has exclusive feature of being magnetically separated from treated media and its stability was demonstrated for at least 3 cycles of dye degradation.
Tanveer Saleh,Indraneel Biswas,Han Seok Lim,Mustafizur Rahman 한국정밀공학회 2008 International Journal of Precision Engineering and Vol.9 No.3
Electrolytic in-process dressing (ELID) grinding is a new technique for achieving a nanoscale surface finish on hard and brittle materials such as optical glass and ceramics. This process applies an electrochemical dressing on the metal-bonded diamond wheels to ensure constant protrusion of sharp cutting grits throughout the grinding cycle. In conventional ELID grinding, a constant source of pulsed DC power is supplied to the ELID cell, but a feedback mechanism is necessary to control the dressing power and obtain better performance. In this study, we propose a new closed-loop wheel dressing technique for grinding wheel truing that addresses the efficient correction of eccentric wheel rotation and the nonuniformity in the grinding wheel profile. The technique relies on an iterative control algorithm for the ELID power supply. An inductive sensor is used to measure the wheel profile based on the gap between the sensor head and wheel edge, and this is used as the feedback signal to control the pulse width of the power supply. We discuss the detailed mathematical design of the control algorithm and provide simulation results that were confirmed experimentally.
Tanveer, Waqas Hassan,Ji, Sanghoon,Yu, Wonjong,Cha, Suk Won Korean Society for Precision Engineering 2015 International Journal of Precision Engineering and Vol.16 No.10
Electrolyte thin films of yttria-stabilized- zirconia (YSZ) for low temperature solid oxide fuel cell applications are investigated. Films of same thickness and composition are fabricated by using two distinct thin film deposition techniques, atomic layer deposition (ALD) and radio frequency (RF) sputtering. Scanning electron microscopic images indicate that both methods form uniform, polycrystalline films on amorphous matrix. Deposition rates of ALD and sputtered YSZ electrolyte films are easily controllable. In-plane ionic conductivity of <TEX>$O^{2-}$</TEX> ions for YSZ is measured using electrochemical impedance spectroscopy. Experimental results show that, at a low temperature of <TEX>$250^{\circ}C$</TEX>, ALD YSZ thin films exhibit considerably lower resistance to the conduction of oxygen ions as compared to the sputtered films. This lower resistance results in better ionic conductivity of ALD YSZ thin films.
Determinants of Corporate Cash Holdings Among Asia’s Emerging and Frontier Markets
Tanveer BAGH,Muhammad Asif KHAN,Natanya MEYER,Rashid SADIQ,Sebastian KOT 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.6
The determinants of Corporate Cash Holdings (CCH) have been a deep-seated debate among institutions and scholars over the last couple of years. Therefore, this paper aims to investigate the determinants of CCH among emerging and frontier markets (Bangladesh, China, India, Pakistan). Due to endogeneity, the generalized methods of moments (GMM) methodology was applied to capture the impacts of different variables, including profitability, firm size, financial leverage growth opportunity, dividend payout, and the business cycle on CCH. The result shows that the firm’s size positively enhances CCH in emerging and frontier markets. Growth opportunity is negatively influenced by CCH in the case of Bangladeshi firms while a positive driver in emerging markets. The business cycle has a negative bearing on CCH across Pakistan, India, and Bangladeshi firms while positive and significant in Chinese firms. Financial leverage and dividend payout were positive determinants of CCH in Chinese firms, while they appear negative for Pakistan, India and Bangladeshi firms. Finally, profitability has a positive and significant impact on CCH in frontier and emerging markets. The study contributes to the incumbent determinants of CCH literature by introducing a fresh outlook and offering policy insights helpful in emerging and frontier markets perspectives.