Learn More
A number of substituted-α,β-unsaturated carbonyl compounds (1a-i) were prepared by Claisen-Schmidt condensation of substituted acetophenone with selected araldehydes, which on cycloaddition with thiourea furnished 4,6-disubstituted pyrimidine-2-thiols (2a-i). Reaction of (2a-i) with ethyl chloroacetate followed by condensation with hydrazine hydrate yielded(More)
Initially SEA is designed for software implementations in controllers, smart cards, or processors. In this Paper we proposed a system that investigates its performances in recent field-programmable gate array (FPGA) devices. The present symmetric encryption algorithms result from a tradeoff between implementation cost and resulting performances. The(More)
Due to the emerging technologies for video compression and broadband Internet, video streaming services are made available. Live video streaming without delay is a reality now. However, the available bandwidth has to be allocated optimally when video streaming takes place over a multicast network. This is because users have different requirement with(More)
In many wireless network applications Optical Orthogonal Frequency Divison Multiplexing (O-OFDM) plays an important role. It is a promising modulation technique for handling rapidly growing internet traffic. But higher peak to average power ratio (PAPR) is a major drawback in O-OFDM systems, which in results increases the complexity of digital to analog(More)
The net retention volumes, V N , of n-alkanes and polar probes on 2-hydroxypyrimidine sulphate (2-HPS) drug surface are determined at 323.15, 328.15 and 333.15 K using inverse gas chromatography. The dispersive surface free energy, $$ \gamma_{S}^{d} $$ γ S d of 2-HPS are evaluated by applying Schultz method as well as Dorris–Gray method and found that $$(More)
Driver fatigue is one of the important factors that cause traffic accidents, and the ever-increasing number due to diminished driver's vigilance level has become a problem of serious concern to society. Drivers with a diminished vigilance level suffer from a marked decline in their abilities of perception, recognition, and vehicle control, and therefore(More)
  • 1