Abstract Acoustic black holes (ABHs) are structural features that can be embedded into plates to provide effective damping. However, the performance of an ABH is limited by its size, which determines cut-on frequency. It not always practicable increase size reduce frequency, however, previous work has shown active vibration control instead used enhance low frequency beam termination. This paper...

geometrically nonlinear governing equations for a plate with linear viscoelastic material are derived. the material model is of boltzmann superposi¬tion principle type. a third-order displacement field is used to model the shear deformation effects. for the solution of the nonlinear governing equations the dynamic relaxation (dr) iterative method together with the finite difference discretizati...

Emerging technologies in microsensing, microactuation, active airfoils, turbine blades, and large, lightweight, flexible space structures can benefit from piezoelectric actuators for active shape control. Piezoelectric materials develop strain under applied voltage which induces structural deflection. This article presents analytical models, FEM solution, and optimal shape control of composite ...

The present work deals with evaluating the nonlinear deflections of smart sandwich plate agglomerated Carbon Nanotubes (CNTs) porous core and piezo-magneto-electric (PME) facings, using a novel finite element method (FEM) – artificial neural network (ANN) approach. For first time, an ANN-based computational tool that integrates effects agglomeration CNTs, porosity pyro-coupling PME materials is...

background: a major issue in many gene expressionstudies utilizing small amount of biological materials is thelimited quantity of rnapurified from clinical samples, which isoften used for rt-pcr or standard northern blot analysis.objectives: the smart cdna synthesis method and subsequentsmart-cdna-pcr technique was used to analyse 3genes in macroschizonts of theileria annulata in small lymphnod...

This article deals with evaluating the frequency response of functionally graded carbon nanotube reinforced magneto-electro-elastic (FG-CNTMEE) plates subjected to open and closed electro-magnetic circuit conditions. In this regard finite element formulation has been derived. The plate kinematics adjudged via higher order shear deformation theory (HSDT) is considered for evaluation. equations m...

drop plate technique has a priority and preference compared with the spread plate procedure, because of less time, quantity of media, effort requirement, little incubator space, and less labor intensive. the objective of this research was to compare the accuracy and fidelity of drop plate method vs. spread plate method by parametric and nonparametric statistical tests. for bacterial enumeration...