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Author: search.filters.author.Roslan, M. S.

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    Kinetic model for carbon species distribution in arc discharge plasma
    (2015-01-12)
    Roslan, M. S.
    ;
    Chaudhary, K.
    ;
    Aziz, M. S.
    ;
    Ali, J.
    ;
    Yupapin, P. P.
    In present work, numerical integration for density distribution of carbon species in arc discharge plasma is presented. The model incorporates two-body collision effects using continuity equation of density in conservation mass rate law. Plasma species in inter-electrode gap are accelerated by the electric field across the gap and produced high density plasma. Electrons with high energy in arc discharge plasma cause extended ionization, excitation, recombination, and dissociation process due to particle collision which leads to enrichment of density in spatial and temporal mode. The extrapolation of species dominant in arc discharge process is critical issue to predict carbon nanostructure production. A chemical kinetic models and distribution of carbon ions and neutrals species based on collision in thermal plasma condition is developed. The reaction process of carbon species are identified in the between electrodes region. The electron-ion recombination cross section is analyzed to understand the density evolution.
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    Capacity enhancement in communication system via NNRR
    (2011-05-02)
    Aziz, M. S.
    ;
    Afroozeh, A.
    ;
    Roslan, M. S.
    ;
    Jalil, M. A.
    ;
    Nawi, I. N.
    We present the effect of the FSR on capacity of communication system. A new novel system of soliton generation using a 1.30 μm optical Gaussian pulse in a nonlinear nano-ring resonator (NNRR) system forms the soliton pulse train. The soliton pulse wavelength with center wavelength at 1.30 μm is generated after a powerful Gaussian soliton pulse is input into the NNRR system, we propose a system that can be used to solve many problems in communication systems. The results show that we how do receive the free spectrum range (FSR) by NNRR. This is obtained via the add/drop filter, which can be used to increase the channel capacity in the communication network. In this paper the best FSR is 0.052 nm. This result allows the channel capacity expanding due to the abundance of propagation spacing from the soliton collision.