Nur Saifullah Kamarrudin
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Preferred name
Nur Saifullah Kamarrudin
Official Name
Nur Saifullah, Kamarrudin
Alternative Name
Kamarrudin, Nur Saifullah
Kamaruddin, N. S.
Kamarrudin, Nur Saifullah
Kamarrudin, N. S.
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Scopus Author ID
56010115700
Researcher ID
HTS-3390-2023

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Efficiency analysis of a passive daylighting system based on Northern Malaysia’s climate

2025-04 , Mohd Sani Mohamad Hashim , Muhammad Amin Zulkifli Din , Abdul Halim Ismail , Mohd Hafif Basha Mohamad Jamel Basha , Nasrul Amri Mohd Amin , Ng Yi Fei , Muhamad Safwan Muhamad Azmi , Siti Marhainis Othman , Nur Saifullah Kamarrudin

Daylighting design strategy is important in order to have adequate lighting source in a room and necessary to decrease energy consumption for artificial lighting. Passive daylighting system utilizes daylight by collecting, reflecting and diffusing the natural light throughout a given area. The purpose for this study is to monitor, compare and analyse an optimum light pipe system design that can scatter daylight into a room based on three case studies. Lighting analysis was conducted using Autodesk 3ds Max Design software throughout the project based on the actual geographical parameters of Universiti Malaysia Perlis, Malaysia and also using the real sun azimuth on working hours. The results were compared according to the respective designs in order to observe the maximum internal illuminance and the average internal illuminance. The results show that the straight geometry with low aspect ratio produces the highest interior light intensity among other light pipe systems and the average internal illuminance values in the room was able to reach the minimum requirement of a small room which is 200 – 500 lux.

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Mesh refinement for cortical and trabecular bone finite element modeling: A review

2020-12-22 , Mohd Zain, Noor Alia , Ruslizam Daud , Nur Saifullah Kamarrudin , Khairel Rafezi Ahmad , Nurul Huda A.A

For centuries, the finite element (FE) method has been extensively used to predict the fracture performance and various method has been implemented to yield accurate results especially in healthcare industries. Bone fracture has been a critical problem since it interrupts the strength and structure of human bone. Thus, this problem will lead to bone malfunction and cause excess bleeding of surround tissues. Human bone consists of cortical and trabecular bone which serve a different amount of load sustainability before the fracture occurred. One of the most vital problems arise is the inaccuracy of the stress intensity factor related to the bone fracture. Recent studies have proven that with the implementation of appropriate meshing element produce higher accuracy results especially with the implementation of mesh refinement in the finite element model. The singularity elements suggested by Barsoum (1976) has proven that the quarter-point triangular elements give highly accurate results. Several methods for stress intensity factor calculation has been implemented by various past researchers. Among all the methods used, J-integral has proven to be the most accurate method compared to the others.The first section in your paper.

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CFD Simulation on Improving Water Quality based on Various Aerator Models to Demonstrate Cost Performance Analysis

2021-12-14 , Nazrul Najmi Norbashah , Muhammad Faiz Hilmi Rani , Nur Saifullah Kamarrudin , Shahriman Abu Bakar , Zuradzman Mohamad Razlan , Wan Khairunizam Wan Ahmad , Mohd Sani Mohamad Hashim , Ishak Ibrahim , Anas Abdul Rahman , Ibrahim Z. , Mohd Khairul Faizi Abd Rahman , Mohamad Aniq Syazwan Mohamed Hassan , Abd Manap A.A. , Zainuddin I.F.

There are many types of aerator that can be used to perform a water treatment process either from air to water or from water to air approaches. Other than focusing on the performance itself, the usage cost of aerator should be forecasted in detail too to have a sustainable and economical method in remediating the polluted water. Therein, the cost performance analysis was demonstrated by performing a computational fluid dynamics (CFD) simulation on improving water quality based on various aerator models. The simulation was focused in a small-scale aeration tank that consists of a mixing chamber, air duct, and a few of bubble diffusers. The improvement of water quality was assessed by calculating the number of gas bubble particles produced by 4 different configurations of aerator model, namely aerator model A, B, C and D, respectively. Results found that the aerator model D (5 bubble diffuser at 620 L/min) produces the highest number of gas particles up to 72.2%. However, the aerator model C (5 bubble diffuser at 300 L/min) was found to achieve the most efficient and sustainable approach based on energy consuming and cost of aerator configuration when compared to the other aerator models.

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Drill Bit Design and Its Effect on Temperature Distribution and Osteonecrosis During Implant Site Preparation: An Experimental Approach

2023-01-01 , Islam M.A. , Nur Saifullah Kamarrudin , Ruslizam Daud , Zuradzman Mohamad Razlan , Muhammad Faisal Hamidi @ Abdul Rani , Ibrahim ii

In this study, the drilling parameters will be evaluated to obtain optimal parameters in minimizing the impact of drilling damage on synthetic bone blocks. The effect of damage observed in the study is osteonecrosis that occurs in the drill hole for implant site preparation, where a smaller value is desired. The drilling parameters are optimized using the Taguchi method with two control factors: the feed rate and spindle speed; each parameter is designed in five levels. This experiment was then carried out on four different designs of drill bits, i.e., Twist (118°and 135°), spherical, and conical drill bits. While experimental planning uses L25 orthogonal arrays, the "smaller is better" approach is used as a standard analysis. The main findings of this research are 118° point angle twist drill bit is the ideal type of drill bit for bone drilling, as it produces less heat than other types of drill bits. The optimal range of feed rate and drilling speed for bone drilling is 40-60 mm/rev and 1000-1400 RPM, respectively. Combining these parameters helps to minimize heat generation during implant site preparation drilling.

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Experimental analysis using thermocouple and infrared thermography of the temperature evolution of lithium-ion polymer cells at different charging rates

2025 , A. I. A. Sabandi , Zuradzman Mohamad Razlan , M. F. H. Rani , N. Maruyama , W. K. Wan , Shahriman Abu Bakar , Nur Saifullah Kamarrudin , Mohd Ridzuan Mohd Jamir

An experiment was designed to investigate the temperature revolution of lithium-ion polymer (LiPo) cells using two different approaches, thermocouples and infrared thermography. The cells were charged under controlled conditions at rates of 2.0 A, 4.0 A, 6.0 A, 8.0 A, and 10.0 A. The analysis focused on the maximum surface temperature, temperature changes over time, and surface temperature distribution. The findings revealed that higher charging rates result in increased heat generation, causing greater temperature rises, steeper temperature gradients, and higher maximum temperatures. During the charging process, the study also observed endothermic behavior and uneven temperature distribution across the cells. However, upon completing the charging, the surface temperature became evenly distributed without any critical hotspots. Notably, maximum temperatures were observed in the lower regions of the cells for lower charging rates (2.0 A, 4.0 A, and 6.0 A) and in the upper regions for higher rates (8.0 A and 10.0 A). Additionally, infrared thermography provided a clearer and more precise method for measuring surface temperatures compared to thermocouples, as indicated by experimental uncertainty analysis. IR imaging also showed a faster temperature increase at higher charging rates, offering deeper insights into the thermal characteristics of LiPo cells.

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Engine Performance Analysis by Studying Heat Transfer in the Valve Seat through Steady-State Thermal Simulation

2021-12-14 , Mohamad Aniq Syazwan Mohamed Hassan , Shahriman Abu Bakar , Zuradzman Mohamad Razlan , Nur Saifullah Kamarrudin , Wan Khairunizam Wan Ahmad , Mohd Sani Mohamad Hashim , Azizi Harun , Ishak Ibrahim , Azizul Aziz I. , Zunaidi Ibrahim , Mohd Khairul Faizi Abd Rahman , Muhammad Faiz Hilmi Rani , Anas Abdul Rahman , Mohd Afendi Rojan , Rishan Murali

As the engine reached high speed, the exhaust valve temperature increased exponentially due to the exhaust gas produced by the combustion process between the mixture of air and fuel within the combustion chamber of the internal combustion engine. The valve is subjected to thermal loading due to high temperature and pressure within the cylinder, which must withstand a material temperature for sustainable and optimal operation. To avoid this loss, a perfect medium must be prepared to ensure that the heat is extracted smoothly. This can be done when the valve is in contact with the seat and there is a periodic heat transfer contact. Therefore, it is imperative to research the correlation between valve and valve seat to understand the two sections' heat transfer mechanism. In this study, thermal contact analysis was used to identify heat transfer between the valve and the valve seat as both parts are interconnected. This research also has an interest in studying the two surface conduction mechanisms as the exhaust valve closed in steady-state conditions. Thus, this study portrays a significant method, particularly for the determining the distribution of temperature, heat flux, and heat flux direction between the valve and its seat using ANSYS Workbench.

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Efficient methodology of route selection for driving cycle development

2017-10-29 , A. R. Mahayadin , Shahriman Abu Bakar , Hashim M.S.M. , Zuradzman Mohamad Razlan , Mohd Khairul Faizi Abd Rahman , Harun A. , Nur Saifullah Kamarrudin , I. Ibrahim , Muhammad Akmal Mat Saad , Rani M.F.H. , Zunaidi I. , Sahari M. , Mohd Sharizan Md Sarip , Razali M.Q.H.A.

Driving cycle is a series of data points representing the speed of vehicle versus time and used to determine the performance of vehicle in general. One of the critical portions of driving cycle development is route selection methodology. This paper describes the efficient methodology of route selection for driving cycle development. Previous data from JKR Road Traffic Volume Malaysia (RTVM) in 2015 is studied and analysed to propose the methodology in route selection. The selected routes are then analysed by using Google Maps. For each region, four (4) routes are selected for each urban and rural. For this paper, the selection of route is focused on northern region of Malaysia specifically in Penang. Penang is chosen for this study because it is one of the developed state in Malaysia that has many urban and rural routes. The methods of route selection constructed in this study could be used by other region to develop their own driving cycles.

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Improvement of Dissolved Oxygen in Perlis River based on Various Aeration Systems

2021-12-14 , Muhammad Faiz Hilmi Rani , Nur Saifullah Kamarrudin , Shahriman Abu Bakar , Zuradzman Mohamad Razlan , Wan Khairunizam Wan Ahmad , Mohd Sani Mohamad Hashim , Ishak Ibrahim , Anas Abdul Rahman , Ibrahim Z. , Mohd Khairul Faizi Abd Rahman , Mohamad Aniq Syazwan Mohamed Hassan , Abd Manap A.A. , Zainuddin I.F.

Water pollution is closely related to the Water Quality Index (WQI). One of the parameters in classifying WQI is dissolved oxygen (DO) that can be improved by introducing the surface and subsurface aerations. Herein, the Perlis River's water quality was investigated by evaluating the DO's improvement based on various aeration systems. The changes of DO (mg/L) and DO improvement (%) were evaluated during both low and high tide conditions. A total of 9 sets of data collection had been studied by comparing base DO (without running of aeration) and measured DO (with running of aeration) of river. The DO sensor was used to measure the changes of DO in the aeration measurement system. Results found that the DO improvement managed to achieve 74.89%, 10.18%, 35.58%, and 52.45% for water jet, air compressor, commercial venturi, and DIY venturi, respectively. Besides, different behaviour of DO's improvement was observed during low and high tide conditions.

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Effect of chewing and cutting condition for V-shape three-dimensional titanium miniplate for fixation of mandibular angle fractures (MAFs)

2020-07-24 , Daud R. , Wenzhao X. , Ibrahim I. , Nur Saifullah Kamarrudin , Khairul Salleh Basaruddin , Mat F. , Ismail R.

Purpose: Miniplate shapes determine the fixation stability to promote best healing and osseointegration process of mandibular fracture. In clinical treatment, the common method used two straight-type miniplate or I-shape miniplate; sometimes this method is not stable enough or limited by the fracture geometry and caused high risk of failure due to screw loosening. This paper aims to investigate a new type of miniplate called V-shape miniplate design as an alternative to the standard straight plate based on total displacement, von Mises stress, stress transfer parameter (STP) and strain energy density transfer parameters (SEDPTs) for two types of bite force condition, which is cutting and chewing condition. Design/methodology/approach: The 3D fixation models were constructed and the finite element (FE) simulation is based on the two-bite force load that ranges from 50 to 700 N based on cutting and chewing bite force condition using ANSYS Workbench 19.2. Findings: In result comparison, the maximum loading of the V-shape miniplate can reduce deformation by 5.9%, reduce stress by 0.58% reduce strain by 8.1% in cutting condition while reducing deformation by 6.43%, reduce stress by 15.25%, reduce strain by 10.1% in chewing condition. To assess the stress transfer behavior of miniplates fixations to the mandibular bone, the STP and SEDPT were evaluated at the normal cortex screw and the locking head screw. In the simulation, the locking head screw is vertical to the bone structure while the cortex screw is 95 degrees to the bone structure, as a result, the STP value for locking head screw is 1.0073 while in cortex screw is 0.7408. Research limitations/implications: Meanwhile, the SEDPT value for locking head screw is 2.7574 and 1.8412 for cortex screw. Practical implications: Clinically, V-shape miniplate has shown factual data that can be used for prototyping. STP and SEDTP values provide evidence of how fixation stability is better than I-shape miniplate. Originality/value: In conclusion, the newly designed V-shape miniplate has overall better stability than the standard I-shape miniplate, and the locking head screw has the STP value closer to 1 than the standard cortex screw; it means the locking screw is better in reducing the stress shielding.

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Parametric investigation on different bone densities to avoid thermal necrosis during bone drilling process

2021-10-25 , Islam M.A. , Nur Saifullah Kamarrudin , Suhaimi M.F.F. , Ruslizam Daud , Ishak Ibrahim , Mat F.

Bone drilling is a universal surgical procedure commonly used for internal fracture fixation, implant placement, or reconstructive surgery in orthopedics and dentistry. The increased temperature during such treatment increases the risk of thermal penetration of the bone, which may delay healing or compromise the fixation's integrity. Thus, avoiding penetration during bone drilling is critical to ensuring the implant's stability, which needs surgical drills with an optimized design. Bovine femur and mandible bones are chosen as the work material since human bones are not available, and they are the closest animal bone to human bone in terms of properties. In the present study, the Taguchi fractional factorial approach was used to determine the best design of surgical drills by comparing the drilling properties (i.e., signal-to-noise ratio and temperature rise). The control factors (spindle speed, drill bit diameter, drill site depth, and their levels) were arranged in an L9 orthogonal array. Drilling experiments were done using nine experimental drills with three repetitions. The findings of this study indicate that the ideal values of the surgical drill's three parameters combination (S1D1Di2) and their percentage contribution are dependent on the drilling levels of the parameters. However, the result shows that the spindle speed has the highest temperature effect among other parameters in both (femur and mandible) bones.

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