Abstract— Photonic Crystal Fibers is a periodic microstructure running along the length. PCFs core and cladding might be based on different materials and various geometries. This article aims to comparative study of dispersion between two different types of Photonic crystal fibers. In the first step we compare material dispersion of both PCFs. And finally the total dispersion generated by both PCFs is compared. For this purpose we have used scalar effective index method (SEIM) and transparent boundary condition (TBC).

Abstract— Paper describes an embedded System based on the µC / OS II operating system using ARM7. It deals with the porting of Micro C/OS-II kernel in ARM powered microcontroller for the implementation of multitasking and time scheduling. Here the real time kernel is the software that manage the time of a micro controller to ensure that all time critical events are processed as efficiently as possible. Different type of interface modules of ARM7 microcontroller like UART, ADC, DAC, KAYPAD, LCD, USB are used and data acquired from these interfaces is tested using µC/OS-II based real time operating system. It mainly emphasizes on the porting o f µC/OS-II.

Abstract— The paper presents an overview on architectures for design implementations of VLSI architecture schemes as specified By standardization committees of the ITU and ISO. Implementation strategies are discussed and split into function specific and programmable architectures. As examples for the function oriented approach, alternative architectures will be evaluated. It is also dedicated decoder chips are included. Architectures are presented for reported design examples from the literature. Heterogeneous processors outperform homogeneous processors because of adaptation to the requirements of special subtasks by dedicated modules. Majority of heterogeneous process incorporate dedicated modules for high performance subtasks of high regularity By normalization to a fictive 1.0 pm CMOS process typical linear relationships between silicon area and through-put rate have been determined for the different architectural style. This relationship indicating a figure of merit for silicon efficiency.