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Building structural health monitoring using dense and sparse topology wireless sensor network
Mohammad E. Haque,Mohammad F.M. Zain,Mohammad A. Hannan,Mohammad H. Rahman 국제구조공학회 2015 Smart Structures and Systems, An International Jou Vol.16 No.4
Wireless sensor technology has been opened up numerous opportunities to advanced health and maintenance monitoring of civil infrastructure. Compare to the traditional tactics, it offers a better way of providing relevant information regarding the condition of building structure health at a lower price. Numerous domestic buildings, especially longer-span buildings have a low frequency response and challenging to measure using deployed numbers of sensors. The way the sensor nodes are connected plays an important role in providing the signals with required strengths. Out of many topologies, the dense and sparse topologies wireless sensor network were extensively used in sensor network applications for collecting health information. However, it is still unclear which topology is better for obtaining health information in terms of greatest components, node\'s size and degree. Theoretical and computational issues arising in the selection of the optimum topology sensor network for estimating coverage area with sensor placement in building structural monitoring are addressed. This work is an attempt to fill this gap in high-rise building structural health monitoring application. The result shows that, the sparse topology sensor network provides better performance compared with the dense topology network and would be a good choice for monitoring high-rise building structural health damage.
Mohamad Azuwa Mohamed,M. F. M. Zain,Lorna Jeffery Minggu,Mohammad B. Kassim,Juhana Jaafar,Nor Aishah Saidina Amin,Mohd Sufri Mastuli,Hao Wu,Roong Jien Wong,Yun Hau Ng 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.77 No.-
The in-situ hierarchical heterojunction photocatalyst consists of C-doped g-C3N4 (CCN) grafted on the C, Nco-doped ZnO were successfully realized via simple bio-template hydrothermal approach. The resultantshierarchical heterojunction photocatalyst exhibited excellent UV to the near infrared absorptioncapability. The electrochemical analysis and photoluminescence spectroscopy revealed that thehierarchical heterojunction photocatalyst possessed excellent charge generation and separationefficiency. The resultant hierarchical heterojunction photocatalyst exhibited remarkable photocatalyticperformance in the photodegradation of bisphenol A and photocatalytic hydrogen evolution undersimulated solar irradiation. The enhancement of photocatalytic performance was mainly attributed tothe combined effect of hierarchical morphology, in-situ doping, and heterojunction formation.