Pushpa Ramakrishna

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ARTICLE INFO ABSTRACT Article history: Interpenetrating polymer network [IPN] microspheres of acrylamide (AAm) grafted on Carboxymethyl cellulose (CMC) and Sodium alginate (NaAlg) microspheres were prepared by water-in-oil (W/O) emulsion method. These microspheres were loaded with Triprolidine hydrochloride monohydrate (TPH) and cross-linked with(More)
A 5 Ton 6 DOF shake table is being indigenously developed in BARC for the seismic qualification of different equipment and structures to be used in nuclear reactors. A Double Actuator Controller with Dual CAN bus Interface (DACCI) has been designed and tested to control two servohydraulic actuators with feedbacks from different sensors on actuators. 5(More)
Wavelet shrinkage is a standard technique for image denoising. Using the good directionality and shift invariance properties of dual tree complex wavelet transform, a new algorithm for image denoisinig is proposed. In this algorithm, the decomposed coefficients combined with the bivariate shrinkage model for the estimation of coefficients in high frequency(More)
Fast responding linear servo-hydraulic actuators with precise motion control are required in applications like seismic shake table and material testing for qualification of components to be used in nuclear reactors. The achievable bandwidth of a servo-hydraulic actuator in position control mode is improved by adding a velocity feedback to it. A fifth order(More)
A multi-band microstrip patch antenna is developed and presented in this paper. The radiating elements in this antenna are composed of rectangular and triangular slots. These slots are engraved in the rectangular and triangular patch, joined together in one structure, and by single probe feed. The rectangular and triangular slots make the antenna to operate(More)
The present prospective study is conducted to determine the prophylactic value of antiparkinsonian drug (A.P.) at the time of initiation of antipsychotic therapy. Seventy patients were selected who fulfilled the selection criteria. Thirty five patients received antipsychotic drugs alone (Group A), while another thirty five patients received A.P. drugs(More)
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