Browsing by Author "Nik Aziz Nik Ali"

Now showing 1 - 3 of 3
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    Electrical, optical and ionic transport study of methycellulose-NH4F polymer electrolyte
    (Fakulti Sains dan Teknologi, 2010-07) Nik Aziz Nik Ali
    In this work the development of biopolymer electrolytes were prepared by incorporating ammonium fluoride in methylcellulose by solution cast technique. Composition of NH4F was varied from 8 wt.% to 25 wt.%. The highest room temperature ionic conductivity of the methylcellulose biopolymer electrolytes is 6.40 x 10-7 Scm-1 for sample with 18 wt.% NH4F. The conductivity-temperature dependents plot shows the Arrhenius behavior with the highest conductivity possessing the lowest activation energy. The dielectric behaviors of the samples show strong dependences on frequency and temperature and found to be a non-Debye type.
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    Modelling and simulation of equations for signals and systems
    (Terengganu: Universiti Malaysia Terengganu, 2007) Nik Aziz Nik Ali
    Nowadays, everyone wants to solve the problem easily without burden themselves. Base on that factor, the simulation to convert the time signal to the representations for signal is done. The representations for signal that have been focused are Fourier transform, Laplace transform and Z transform. Graphical User Interface (GUI) in Matrix Laboratory (MATLAB) software is used to create the interface of these three representations for signal. The user just need to enter a desired time signal equation into edit text box and by a single click on the specified button, the representation for the signal will be displayed in the text box and the graph will also appear. If before, users must refer to the table every time they want to convert the time signal to representations for signal but now is not to do so. Overall, this project was done successfully and the result that has been obtained was similar to the standard value.
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    The study of marine microlagae chlorophyll as dye for hybrid solar cell
    (Terengganu: Universiti Malaysia Terengganu, 2014-09) Nik Aziz Nik Ali
    The solar electricity is presently a rapidly growing but often relatively expensive renewable energy form. Recently however, new molecular photovoltaic (PV) materials have been developed, which could enable a production of low-cost solar cells in the future. To address the latter issues, the development of chlorophyll from marine microalgae based on hybrid solar cell (HSC) with nano structured oxide and conjugated polymer were investigated. Chlorophyll (CHLO) dye from marine microalgae (Chlorella s.p.) has been extracted and their optical properties were study using fourier transform infrared (FTIR) and ultraviolet-visible spectroscopy (UV-VIS).