Mohd Fathullah Ghazli@Ghazali
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Mohd Fathullah Ghazli@Ghazali
Official Name
Mohd Fathullah, Ghazli@Ghazali
Alternative Name
Fathullah, Mohd
Ghazli, Mohd
Ghazli, M. F.
Ghazali, Mohd Fathullah
Fathullah, G. M.
Main Affiliation
Scopus Author ID
57428935900
Researcher ID
AAK-5597-2020

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  • Publication
    Optimisation of warpage on plastic injection moulding part using response surface methodology (RSM) and genetic algorithm method (GA)
    ( 2017-09-26)
    Miza A.T.N.A.
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Mohd. Nasir Mat Saad
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Mohd. Hazwan Mohd. Hanid
    In this study, Computer Aided Engineering was used for injection moulding simulation. The method of Design of experiment (DOE) was utilize according to the Latin Square orthogonal array. The relationship between the injection moulding parameters and warpage were identify based on the experimental data that used. Response Surface Methodology (RSM) was used as to validate the model accuracy. Then, the RSM and GA method were combine as to examine the optimum injection moulding process parameter. Therefore the optimisation of injection moulding is largely improve and the result shown an increasing accuracy and also reliability. The propose method by combining RSM and GA method also contribute in minimising the warpage from occur.
  • Publication
    Printing Parameter Optimization of Biodegradable PLA Stent Strut Thickness by using Response Surface Methodology (RSM)
    ( 2020-07-09)
    Asyraf Azli A.
    ;
    Muhammad N.
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Andrei Victor S.
    This work presents printing parameter optimization of 3D printed biodegradable PLA stent. This study is motivated by a gap in current knowledge in 3D printing of stents identified in an extensive literature review. With the demand of coronary artery stents rising every year, the stent production demands a higher quality, lower cost, faster and economical process. Due to its availability relatively low-cost price and adaptability, PLA has been identified for an ideal material for biodegradable stents. Previously, laser micromachining was widely used for processing coronary stent. The emerging of 3D printing process has gained attention for its low cost, high reliability, simple operation and flexibility has shown potential as promising solutions in stents fabrication. The use of 3D printing for stent manufacturing purpose is newly emerge and not widely reported. Up to now, less research has been conducted on 3D printed PLA coronary artery stents. This work therefore, aims to study the relationship of the 3D printing processing parameter towards stents quality. Strut thickness become the key aspects in stents manufacturing. Processing parameter optimization was performed by using Response Surface Methodology (RSM). Nozzle temperature and printing speed were both effecting the strut thickness formations regardless of printing orientations.
  • Publication
    Influence of Sm³⁺ in alkaline metals Eu³⁺ molybdate/tungstate red phosphor: a review
    ( 2017-09-26)
    Syazwanie Zailani
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Rosli Hussin
    This paper reviews on previous and on-going works relating to the interaction of Eu³⁺ and Sm³⁺ used in AGd(1-x)Eux(MO4)2 where (A=Li+, K+ and Na+) and (M=Mo and W) in alkaline metals red phosphors - AGd(1-x)EuxSmy(MoO4)2. A literature review in terms of its crystal structures as well its effects on the photoluminescence properties of the phosphor is elucidated herein. The outcome from this review concludes that there is a large possibility that a more efficient red phosphor can be obtained by introducing Sm³⁺ on AGd(1-x)EuxSmy(MoO4)2.
  • Publication
    Evaluation of risk and hazard on a wood-working workplace: A case study of a consultant
    ( 2023-04-24)
    Mohd Fathullah Ghazli@Ghazali
    ;
    Osman M.S.
    ;
    Darmawan V.E.B.
    ;
    Ismail A.I.
    ;
    Chai E.Y.
    ;
    Rashid H.H.A.
    ;
    Norli K.
    ;
    Nain L.T.
    This paper reports a review and analysis using HIRARC based on a case study of evaluating the workplace hazard and safety in the industries. From the case studies, a HIRARC Analysis was developed by highlighting at least three potential hazards. The score from the analysis was presented in the form of PARETO analysis to rank the priorities to be solved. Each hazard identified in the analysis need to be proposed by a solution according the Hierarchy of Controls. Lastly, a Plan-Do-Check-Act (PDCA) is suggested for the employer in sustaining a safety workplace.
  • Publication
    Effect of tool engagement on cutting force for different step over in milling aisi p20 tool steel
    ( 2021-01-01)
    Roshaliza Hamidon
    ;
    Mohamed N.I.
    ;
    Saravanan R.
    ;
    Azmi H.
    ;
    Zailani Zainal Abidin
    ;
    Mohd Fathullah Ghazli@Ghazali
    In mold production, end milling with tool path strategies is required for the process known as pocket operation. Different step overs involve depending on the type of tool path strategy used. Thus, different engagement will occur and leads to fluctuation of cutting force due to different step over during the process. However, most of study before focused on the effect of cutting speed, feed rate and depth of cut only in machining AISI P20. Thus, in this study, step over will be considered as one of the factor to improve machining force. The objective of this study are to evaluate the effect of cutting parameters and step over on cutting force and to study the behavior of cutting force for different tool engagement. A series of milling operation was carried out by varying cutting speed and feed rate. However, the depth of cut was set to 0.25 mm for each run. Step over with 100%, 75% and 50% were selected in this study. L27 Taguchi and S/N ratio were used to determine the significant factors that influence the result. Within the range of cutting parameters selected, feed rate were found to be the most significant parameters that influence cutting force. The highest cutting force found for 100% step over compared to 75% and 50% step over. According to the result, cutting force increased as the step over increased. In can be concluded that, step over is one of the important cutting parameter that affected machining output.
  • Publication
    Feasibility of Multilayer Perceptron (MLP) Network to Correlate Air Quality Index (AQI) and COVID-19 Daily Cases
    ( 2023-01-01)
    Abd Maruzuki M.I.F.
    ;
    Tengku Zahidi T.S.A.
    ;
    Khairudin K.
    ;
    Osman M.S.
    ;
    Jasmy N.F.
    ;
    Abdul Hadi B.
    ;
    Akbar M.S.
    ;
    Saufie A.Z.U.
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Nor Syamsudin D.S.
    ;
    Mohd Nazeri N.B.
    A movement control order (MCO) was implemented in Malaysia starting from March 18th, 2020, as a pandemic control strategy that restricted all movement and daily outdoor activities to curb the transmission of COVID-19 pandemic. The most populated area in Malaysia, Petaling Jaya, Selangor, was selected to investigate the relationship between the COVID-19 outbreak and air pollution. Multilayer perceptron (MLP) model was used in this study to correlate air quality index (AQI) with COVID-19-related cases/deaths. The underlying hypothesis is that a pre-determined particulate concentration can encourage COVID-19 airborne transmission and make the respiratory system more susceptible to this infection. The in-silico strategy employed an innovative machine learning (ML) methodology, specifically MLP network using AQI data from the Department of Environment (DOE), Malaysia as input data and number of COVID-19 cases from the Ministry of Health, Malaysia as target data. The MLP model was trained for 10,000 times. Based on the results obtained, the model starts to converge after 1000 epochs with a small mean absolute error (MAE) (173.0–118.9) from day 1 to day 14. However, there is no definitive correlation between predicted COVID-19 patients and the AQI with respect to day configuration.
  • Publication
    Thermal Insulation and Mechanical Properties in the Presence of Glas Bubble in Fly Ash Geopolymer Paste
    ( 2022-01-01)
    Shahedan N.F.
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Norsuria Mahmed
    ;
    Liew Yun Ming
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Aziz I.H.A.
    ;
    Kadir A.A.
    ;
    Sandu A.V.
    ;
    Mohd Fathullah Ghazli@Ghazali
    The density, compressive strength, and thermal insulation properties of fly ash geopolymer paste are reported. Novel insulation material of glass bubble was used as a replacement of fly ash binder to significantly enhance the mechanical and thermal properties compared to the geopolymer paste. The results showed that the density and compressive strength of 50% glass bubble was 1.45 g/ cm3 and 42.5 MPa, respectively, meeting the standard requirement for structural concrete. Meanwhile, the compatibility of 50% glass bubbles tested showed that the thermal conductivity (0.898 W/mK), specific heat (2.141 MJ/m3K), and thermal diffusivity (0.572 mm2/s) in meeting the same requirement. The improvement of thermal insulation properties revealed the potential use of glass bubbles as an insulation material in construction material.
  • Publication
    Design and development of fire escape window grille keyless locking system
    ( 2021-07-21)
    Mohd Shuhidan Saleh
    ;
    Yee N.K.
    ;
    Noorhafiza Muhammad
    ;
    Muhamad Farizuan Rosli
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Norshah Afizi Shuaib
    The most fire-related fatalities are due to the smoke inhalation of the toxic gases. It is related to the victims being trapped in the building when the building was on fire. It was also reported that major deaths from fire related are from the toxic gases inhalation produced by the fire while the deaths due to fire flames and burning was about one third of the total deaths. The access to the exit door was blocked and they could not exit through the window due to the permanent grille installation. It was well aware that most Malaysian homeowners installed grilles on their house windows or doors for security reason since there are lots of break-ins incidences. To overcome the issue, this work introduces a window grille with keyless locking system. The design incorporated keyless system that can be operated or opened without a key. Several designs for implementing this solution have been described. These designs are divided into three sections, which is a grille design, expansion designs which use to accommodate a wide range of window-sized and keyless locking systems. The size and type of grille suitable for Malaysian residents as well as the more efficient keyless locking system has been studied in detail using the method of case study and survey method. Step of patent research, market analysis and benchmarking are used as methods for collecting reference data. The most effective fire escape window grille keyless locking system has been studied and designed from this project. An important factor in designing a fire window grille is the design that can be opened and does not require a key operation. The results of the design and analysis tested are presented such that they can be used as an aid to the design of fire escape features.
  • Publication
    Elektronik asas : untuk pelajar mekanikal
    ( 2015)
    Amarul Talip
    ;
    Mohd Sazli Saad
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Nur Ismalina Haris
    Buku ini mengandungi lapan (8) bab kesemuanya di mana ia telah disusun dan mencakupi bab-bab asas yang penting untuk membentuk satu ilmu asas Teknologi Elektrik yang lengkap untuk para pelajar Kejuruteraan Mekanikal. Antara bab-bab tersebut ialah, Asas Kejuruteraan Elektrik, Litar Arus Terus, Litar Arus Ulang-alik, Sistem Tiga Fasa, Elektromagnetik, Pengubah, Mesin Arus Terus dan Mesin Pearuh Tiga Fasa. Di samping itu, buku ini juga diharapkan dapat menjadi rujukan para pelajar dari politeknik khasnya dan institusi pengajian tinggi amnya kerana bilangan buku-buku rujukan yang terdapat dalam Bahasa Melayu adalah terhad. Dalam usaha untuk menambah bilangan buku-buku rujukan yang ditulis dalam Bahasa Melayu, penghasilan buku ini diharapkan dapat membantu pelajar Kejuruteraan khususnya Kejuruteraan Mekanikal untuk lebih memahami dan menguasai Asas Teknologi Elektrik.
      28  192
  • Publication
    Analysis on addition of novel Sm3+ in replacing Eu3+ in lieu(0.45-x)Gd0.55(MoO4)2 phosphor
    ( 2020-08-01)
    Mohd Fathullah Ghazli@Ghazali
    ;
    Hussin R.
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Mohd. Mustafa Al Bakri Abdullah
    ;
    Zailani N.S.
    Europium is amongst the most critical and expensive rare earths due to its luminescence properties for red element in displays and lighting technology. As the market demand of Europium is now at scarce, this paper tried minimize the use of Europium. In the mean time, Samarium (Sm3+) has been of interests as it can contribute in the red/orange emitting activator but researches of Sm3+ potentials in replacing Eu3+ was hardly found. In this article, a series of red phosphors LiEu(0.55-x)Gd0.45(MoO4)2Smx were synthesised using solid-state reaction and an XRD analysis conducted confirmed that the structure of the compounds to remain as tetragonal scheelite structure. Results showed that 0.10 mol of Sm3+ can increase the luminescence intensity and the overlaid patterns show that there are no additional peaks occurred in the increasing of Sm3+ to the compound which confirm that the structure remained tetragonal scheelite structure with space group I41/a. This finding has opened an opportunity for industries and researchers to use Sm3+ in reducing the cost of consuming Eu3+ in lighting technologies.
      2