SRM University

About: SRM University is a education organization based out in Chennai, India. It is known for research contribution in the topics: Computer science & Population. The organization has 10787 authors who have published 11704 publications receiving 103767 citations. The organization is also known as: Sri Ramaswamy Memorial University.

A Compact Dual-Polarized MIMO Antenna With Distinct Diversity Performance for UWB Applications

Abstract: In this letter, a simple compact dual-polarized ultrawideband (UWB) multiple-input–multiple-output (MIMO) antenna is presented with the circularly polarized band for WiMAX (5.5 GHz) and WLAN (5, 5.2 GHz) applications. The antenna parameters such as reflection coefficient, diversity performance, gain, axial ratio, and isolation have been studied on a fabricated prototype of the proposed antenna. The 3 dB axial-ratio bandwidth (ARBW) of 34.38% along with isolation between two ports has been achieved by introducing a rectangular vertical arm (I-parameter) in the ground plane. To enhance the isolation and –10 dB impedance bandwidth, L-shaped radiators have been incorporated in the rectangular feeds. The –10 dB impedance bandwidth of the proposed antenna is 112.05% with isolation >17 dB. The envelope correlation coefficient is less than 0.01 (using S -parameter) and less than 0.15 (using far-field radiation pattern) in the entire operational bandwidth. The gain of the proposed antenna varies from 1.2 to 4.9 dBi. The performance of the proposed antenna makes it a suitable candidate for use in portable UWB applications as well as in wireless communication systems.

Electrospun Nanofibrous Scaffolds-Current Status and Prospects in Drug Delivery

Abstract: Controlled delivery systems are used to improve therapeutic efficacy and safety of drugs by delivering them over a period of treatment to the site of action at a rate dictated by the need of the physiological environment. A wide variety of polymeric materials, either biodegradable or non-biodegradable but biocompatible, can be used as delivery matrices. Recently, nanofibrous scaffolds, such as the systems fabricated by electrospinning or electrospraying, have been used in the field of biomedical engineering as wound dressings, scaffolds for tissue engineering, and drug delivery systems. The electrospun nanofibrous scaffolds can be used as carriers for various types of drugs, genes, and growth factors, whereby the release profile can be finely controlled by modulation of the scaffold’s morphology, porosity, and composition. The main advantage of this system is that it offers site-specific delivery of any number of therapeutics from the scaffold into the body. The aim of this chapter is to review the recent advances on electrospun nanofibrous scaffolds based on biodegradable and biocompatible polymers for controlled drug and biomolecule delivery applications. The use of electrospun scaffolds as drug carriers is promising for future biomedical applications, particularly in the prevention of post-surgical adhesions and infections, for postoperative local chemotherapy, and for bone and skin tissue engineering.