Mohd Zakimi Zakaria
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Mohd Zakimi Zakaria
Official Name
Mohd Zakimi , Zakaria
Alternative Name
Zakaria, Mohd Z.
Zakaria, M. Z.
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Scopus Author ID
36999011800
Researcher ID
D-7223-2015

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  • Publication
    Synthesizing and Optimization the Hydroxyapatite Based on Corbiculacea Seashells
    ( 2021-01-01)
    Mohd Riza Mohd Roslan
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Nur Farahiyah Mohammad
    ;
    Cheng Ee Meng
    ;
    Nasrul Amri Mohd Amin
    ;
    Abdul Khalid M.F.
    ;
    Mohd Zakimi Zakaria
    ;
    Muhammad Mokhzaini Azizan
    ;
    Muzammil Jusoh
    Hydroxyapatite (HA) is one of the main components in bone which functions to enhance its cell regeneration. Synthetically produced HA, based on seashell resources has higher biocompatibility, and in high demand especially in bone tissue engineering. However, the secondary phase of HA production are calcium oxide and carbonate, which impedes its performance. HA is synthesized via wet chemical precipitation and optimization were done to obtain nearly pure HA by manipulating the pH value and sintering temperature. It is expected that the combination of these parameters will optimize the amount of secondary phase hence attained nearly stoichiometric or pure HA. HA powders were analyzed through Fourier Transform Infrared Spectroscopy (FTIR) and Energy Dispersive X-ray Spectrometry (EDX).
      1
  • Publication
    Comparison of Algebraic Reconstruction Technique Methods and Generative Adversarial Network in Image Reconstruction of Magnetic Induction Tomography (MIT)
    ( 2021-11-25)
    Lubis A.J.
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Zulkarnay Zakaria
    ;
    Muzammil Jusoh
    ;
    Azizan M.M.
    ;
    Mohd Zakimi Zakaria
    ;
    Mohd Nor Fakhzan Mohd Kazim
    ;
    Rahman S.
    Magnetic induction tomography (MIT) is a technique used for imaging electromagnetic properties of objects using eddy current effects. The non-linear characteristics had led to more difficulties with its solution especially in dealing with low conductivity imaging materials such as biological tissues. Two methods that could be applied for MIT image processing which is the Generative Adversarial Network (GAN) and the Algebraic Reconstruction Technique (ART). ART is widely used in the industry due to its ability to improve the quality of the reconstructed image at a high scanning speed. GAN is an intelligent method which would be able to carry out the training process. In the GAN method, the MIT principle is used to find the optimum global conductivity distribution and it is described as a training process and later, reconstructed by a generator. The output is an approximate reconstruction of the distribution's internal conductivity image. Then, the results were compared with the previous traditional algorithm, namely the regularization algorithm of BPNN and Tikhonov Regularization method. It turned out that GAN had able to adjust the non-linear relationship between input and output. GAN was also able to solve non-linear problems that cannot be solved in the previous traditional algorithms, namely Back Propagation Neural Network (BPNN) and Tikhonov Regularization method. There are several other intelligent algorithms such as CNN (Convolution Neural Network) and K-NN (K-Nearest Neighbor), but such algorithms have not been able to produce the expected image quality. Thus, further study is still needed for the improvement of the image quality. The expected result in this study is the comparison of these two techniques, namely ART and GAN to get the best results on the image reconstruction using MIT. Thus, it is shown that GAN is a better candidate for this purpose.
      2  27
  • Publication
    Medium sized industrial motor solutions to mitigate the issue of high inrush starting current
    ( 2021-05-03)
    Azizan N.S.
    ;
    Azizan M.M.
    ;
    Muhammad Izuan Fahmi Romli
    ;
    Muhammad Zaid Aihsan
    ;
    Muzammil Jusoh
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Mohd Zakimi Zakaria
    Starting of a medium or large induction motors generate such a large current during direct-on-line (DOL) starting process to the point that it can drop the voltage of power supply. The induction motor can be broken, its characteristics can be changed, and performances of the motor can be worsened. A significant higher starting current than the rated current can generate mechanical and thermal stress on the motor and the loads. High-voltage fluctuations, dips and sags can arise in electrical power systems associated with the motor. To overcome this problem, various starters were designed. There are several types of starters in which can be divided into conventional starters and power electronic drives. Conventional starters are such as direct-online, star-delta and autotransformer whereas the example for power electronics are matrix converter, frequency inverter and soft starter. In this paper, the design of autotransformer and soft starter are focused in order to compare inrush current during the start-up three phase medium sized industrial induction motor by using MATLAB/Simulink software. Both starters were targeted to resolve the problems inherent in the dynamic operation of induction motors, which included current and torque surges during the motor start up. The autotransformer gives the choice to consumer in selecting different tap values, in which is the advantage to consumer to vary their starting current and starting torque according to its application. On the other hand, the three-phase soft starter employs two anti-parallel connected switches in each phase. Thyristors act as the switches due to their higher power rating and high efficiency. Then, both methods will be compared to prove the best performance in mitigate high inrush current. The best of the two is likely to be the answer for mitigating the issue of high inrush starting current for a medium size motor at industries.
      32  1
  • Publication
    Research Objective in Assembly Line Balancing Problem: A Short Review
    ( 2021-01-01)
    Nurhanani Abu Bakar
    ;
    Mohd Zakimi Zakaria
    ;
    Mohammad Fadzli Ramli
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Muhammad Mokhzaini Azizan
    ;
    Muzammil Jusoh
    Presently, the arising of industrial revolution has encouraged the advance of technology especially in manufacturing engineering industry. Assembly line balancing (ALB) plays very importance role in manufacturing due to improve the process of efficiency and increase the production rate. In this case, authors have a tendency to study and explore in detail about assembly line balancing problem (ALBP). This paper aims to review the research objectives on ALBP based on 60 articles that try to solve this problem using various approach. In general, this paper performs a survey of ALBP research from 2017 to 2018 in order to see the trend of current study. The publication that listed in this survey have create some division section of ALBP research that describe in short the classification of ALB and the objectives of research. The literature review in research objective may highlight the significant objectives in ALB and provide guidance for future work to look into the research gap.
      2  25
  • Publication
    The dielectric characterization of tapioca starch – Ha tissue scaffold
    (IOP Publishing, 2020)
    Nashrul Fazli Mohd Nasir
    ;
    Cheng Ee Meng
    ;
    Nurathirah Jamal
    ;
    Mohd Riza Mohd Roslan
    ;
    Nur Aerina Fitri Mohd Hoři
    ;
    Beh Chong You
    ;
    Muzammil Jusoh
    ;
    Mokhzaini Azizan
    ;
    Mohd Farid Abdul Khalid
    ;
    Mohd Zakimi Zakaria
    Tapioca starch-hydroxyapatite (HA) composites scaffold was fabricated using solvent casting and particulate leaching. The solvent casting involved the casting of polymer while particulate leaching involved the removal of porogen agent. The percentage of tapioca starch used were 50%, 60%, 70%, 80% and 90%, with the percentages of hydroxyapatite (HA) were set as 50%, 40%, 30%, 20% and 10% respectively. Here, sodium chloride was used as a porogen agent. SEM analysis was conducted to determine the micro structural of the scaffold surface. Based on the results, the pore size of composite scaffold is between ranges of 198 µm to 786 µm. For the dielectric study, the dielectric constants (D’) and dielectric loss factor (D”) over frequency range from 12.4 GHz to 18.0 GHz were obtained by transmission line method. Based on the result, both dielectric constant (s’) and dielectric loss factor (s”) was declined with the increment of the frequency.
      4  9
  • Publication
    Smart Gateless System using RFID Technology in Universiti Malaysia Perlis
    ( 2021-06-11)
    Ainur Fasihah Mohd Fazilah
    ;
    Muzammil Jusoh
    ;
    Ammar Zakaria
    ;
    Thennarasan Sabapathy
    ;
    Mohd Firdaus Ibrahim
    ;
    Hasliza A Rahim @ Samsuddin
    ;
    Muhammad Mokhzaini Azizan
    ;
    Mohd Zakimi Zakaria
    ;
    Nashrul Fazli Mohd Nasir
    ;
    Albreem M.A.M.
    ;
    R Badlishah Ahmad
    This paper describes a smart monitoring gate-less system by using RFID technologies that had been implemented in Universiti Malaysia Perlis. The objective of this system is to ease the security to monitoring the cars-in and cars-out from the main gate manually. The security can check and manage the staff by system management in PC. This smart monitoring gate-less system consists of RFID tag antenna that be attached at sticker's staff, RFID reader and software management application. For the software management application, this project used LabView as a simulation tool for the data acquisition. The data which contains of name, staff number, number plate, car model and color will be stored in cloud-based storage. All the information data can be accessed from any location because the security management can access it through mobile. This project will present how efficient the vehicle control application on campus which enable the security guard to check a car sticker either legal or illegal in a shortest way.
      8  35