The problem of scattering of Rayleigh waves at a rectangular groove is addressed. Grooves are known to excite bulk waves upon scattering and, hence, are potential sources (albeit secondary) in bulk-acoustic-wave (BAW) devices. Herein the groove is formulated as a volume perturbation of the geometry. Modal method is used and the results of Rayleigh wave reflection as well as bulk wave radiation are obtained and compared with the results available in the literature. The method as such is also compared with the boundary perturbation formulation. © 1992 IEEE

Ashok Jhunjhunwala

Department of Electrical Engineering

ACOUSTIC WAVES--MATHEMATICAL MODELS

BOUNDARY PERTURBATION FORMULA

BULK ACOUSTIC WAVE (BAW) DEVICES

BULK WAVES

RAYLEIGH WAVE SCATTERING

RECTANGULAR GROOVE

VOLUME PERTURBATION APPROACH

Acoustic waves

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

A volume-perturbation approach to the problem of Rayleigh wave scattering at a rectangular groove

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

The Indian construction industry faces increasing challenges amidst serious performance shortfalls. Confronting similar issues in past decades, other countries such as the UK, USA, and Singapore commissioned high-powered studies and set up industry development bodies to address their own priorities. Initiatives in other countries are briefly reviewed before outlining the launch of the "Construction Industry Improvement Initiative India" (Ci3 India) that aims to address our own challenges. This paper focuses on identifying and launching a platform to address the current and imminent critical issues in the Indian Construction Industry. Nineteen critical issues were identified, verified, and validated through four focus group sessions at two Regional Roundtables with 54 high calibre large building construction clients, academicians, and other invited experts. The identified issues were consolidated to 10 Action Items. Seven Action Teams were then mobilized to work on the 10 Action Items. Having consolidated a base consensus of clients on the way forward, it was also proposed to develop a "Construction Clients' Charter" that will set out basic principles, protocols, and targeted good practices by lead clients, who by voluntarily agreeing and implementing these together, could catalyse significant industry improvements. © Penerbit Universiti Sains Malaysia, 2017.

Fulltext

Journal of Construction in Developing Countries

Identifying and addressing critical issues in the Indian construction industry: Perspectives of large building construction clients

CSEE Journal of Power and Energy Systems

A standalone BLDC based solar air cooler with MPP tracking for improved efficiency

Optical Waveguide Theory

Bends

Electronics Letters

High frequency acoustic plate mode device employing interdigital transducers

Journal of Applied Physics

First‐order reflection coefficient of surface acoustic waves from thin‐strip overlays

A Volume-Pėrturbation Approach to the Problem of Rayleigh Wave Scattering at a Rectangular Groove

Journal	IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
ISSN	08853010
Open Access	No