Wan Abdul Rahman Assyahid Wan Ibrahim
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Preferred name
Wan Abdul Rahman Assyahid Wan Ibrahim
Official Name
Wan Abdul Rahman Assyahid, Wan Ibrahim
Alternative Name
Wan Abdul Rahman Assyahid, Wan Ibrahim
Wan Abd. Rahman Assyahid, Wan Ibrahim
Main Affiliation
Universiti Malaysia Perlis
Scopus Author ID
56943590200

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  • Publication
    Advancements in cognitive ergonomics integration with human-robot collaboration, workload management, and industrial applications
    ( 2024)
    Ahmad Humaizi Hilmi
    ;
    Asna Rasyidah Abd Hamid
    ;
    Wan Abdul Rahman Assyahid Wan Ibrahim
    Cognitive ergonomics is increasingly essential in modern industries, particularly in human-robot collaboration (HRC), where it addresses mental workload, decision-making, and overall worker well-being. As industrial systems transition into Industry 4.0 and Industry 5.0, the integration of robotics and artificial intelligence (AI) into human-centered processes necessitates the management of cognitive load. Cognitive ergonomics enhances workplace efficiency by optimizing human-system interactions, reducing mental strain, and improving task performance in complex environments. By focusing on real-time workload management, including the use of biosensors and eye-tracking technologies, industries can monitor cognitive strain, allowing for immediate task adjustments to maintain productivity and safety. Cognitive ergonomics also plays a pivotal role in enhancing human factors in HRC by aligning machine design with human mental capabilities. Effective human-machine interfaces (HMIs) based on cognitive ergonomic principles improve decision-making, reduce errors, and enhance user satisfaction. As industries continue to adopt advanced robotics, the mental demands on workers increase, making cognitive ergonomics crucial for mitigating risks associated with cognitive overload. Future trends point toward the integration of cognitive ergonomics with emerging technologies like AI, wearable devices, and virtual reality (VR), offering new avenues for workload management and decision support. These advancements aim to balance the cognitive demands on workers, ensuring that systems are designed to enhance performance without causing mental fatigue or stress. Overall, cognitive ergonomics remains a vital component in ensuring the well-being and efficiency of workers in technologically advanced industrial environments.
  • Publication
    Human-centered ergonomic: advancements, challenges, and future directions in industrial and occupational settings
    ( 2024)
    Ahmad Humaizi Hilmi
    ;
    Asna Rasyidah Abdul Hamid
    ;
    Wan Abdul Rahman Assyahid Wan Ibrahim
    The field of human-centered ergonomics has evolved significantly, especially in industrial and occupational settings, where the focus is on optimizing worker performance and well-being through the integration of advanced technologies. This review paper explores the key advancements, challenges, and future directions in ergonomics as they relate to Industry 4.0, cognitive ergonomics, aging workforces, and sustainable manufacturing. With the rise of Industry 4.0, technologies such as motion capture, virtual reality, and autonomous systems have proven to be invaluable tools in addressing ergonomic risks while improving productivity. These innovations enable better task design and human-machine interactions, reducing both physical strain and cognitive load. However, the integration of technology also presents challenges, particularly for the aging workforce, which is more susceptible to ergonomic stressors. Ergonomic interventions such as assistive devices, like exoskeletons, and tailored workspace designs are critical for maintaining productivity and health among older workers. Furthermore, the review discusses the role of ergonomics in sustainable manufacturing, highlighting how ergonomic principles contribute to environmental goals by reducing energy consumption, waste, and physical strain. Cognitive ergonomics, which addresses mental workload and human-computer interaction, is another crucial area explored in this paper. As automation increases, optimizing human cognitive performance is essential to reducing errors and enhancing safety in complex work environments. In conclusion, while advancements in technology offer promising solutions to many ergonomic challenges, the future of human-centered ergonomics will require continued research and innovation to address the evolving needs of workers in diverse and technologically advanced environments. The ongoing development of ergonomic interventions that balance human well-being with industrial efficiency will remain central to the future of work.
  • Publication
    Doping content dependencies on the structure modification and bandgap broadening of Al induced sol-gel derived ZnO nanostructures
    (Universiti Malaysia Perlis (UniMAP), 2021-10)
    Marina Marzuki
    ;
    Mohd Zamzuri Mohammad Zain
    ;
    Wan Abdul Rahman Assyahid Wan Ibrahim
    ;
    Nooraizedfiza Zainon
    ;
    Rozie Nani Ahmad
    This paper reports the Al doping content dependence on structure modification and band gap wid-ening of sol-gel synthesised Al-doped ZnO thin films. The precursor, solvent and stabiliser used to prepare ZnO solution were Zinc Acetate Dihydrate, 2-propanol and ethanolamine, respectively. Mo-larity fractions of 0, 4, 6 and 8% of Al (NO3)2 as dopant source was incorporated into ZnO host system and prepared by individual buffer solutions. The prepared sols were subsequently deposited onto ITO glass substrates, and the resultant thin films were characterised. XRD patterns exhibit the polycrys-talline nature of pure and doped ZnO films, with preferred orientations correspond to (1 0 0), (0 0 2) and (1 0 1) planes. Lattice shrinking is indicated by the decrease lattice constant c due to axial com-pression. Peaks shifting towards higher angle are observed implying a structural modification over doped thin films that affects the optical properties, which agrees with the lattice shrinking. The ab-sorption edge has an obvious blueshift to the shorter wavelength with increased dopant content. The thin films’ energy bands were procured by Tauc’s linear extrapolation and was found to be broaden-ing from 3.32 eV to 3.34 eV in 6% Al-doped ZnO. There exists a significant correlation between the applied doping level and the extend of variation of structural properties and ultimately, lattice im-perfection. Doping of smaller-atom-sized Al into ZnO concedes with the Burstein-Moss principles. 6% Al doping imposes the highest peak shift and ultimately has the highest impact on lattice parameter and energy band.
  • Publication
    The mechanism analysis of belt-pulley driven spray plunger pump
    (AIP Publishing, 2023)
    Wan Abdul Rahman Assyahid Wan Ibrahim
    ;
    Irfan Abd Rahim
    ;
    Muhammad Rifqie
    ;
    Mohd Effendi Muhammad Suandi
    ;
    Muhammad Akmal Syakir
    ;
    Noorhafiza Muhammad
    ;
    Nur Amilea Nabila
    ;
    Nurul Izzati
    This paper presents an analysis of the mechanism of Belt-Pulley Driven Spray Plunger Pump. Belts and pulleys are used to transfer kinetic energy from the internal combustion (IC) engine to operate the pump. Combination of pulley and belts was used to transfer motion between each other simply without the need for meshed toothed gearing. The principal remains the same that there is a driver (powered) and driven (free). The benefit from application of belts which are mostly made of synthetic fibres is that no lubrication is necessary compared to chains. The analysis is focused on power transmitted from IC engine to plunger pump (design power) considering service factor as well as determining total number of belts to be used in the system with refer to FENNER Friction Belt Range Brochure Technical Docs.
  • Publication
    Optimization of heating rate on hybrid microwave sintering of the PM Fe-Cr MMCs reinforced with Al2O3particle
    ( 2021-07-21)
    Wan Abdul Rahman Assyahid Wan Ibrahim
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Radhwan Hussin
    ;
    Muhamad Farizuan Rosli
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Murizam Darus
    This study reports the optimization of heating rate on the microwave sintered Fe-Cr-Al2O3 metal matrix composite (MMC). The heating rate was selected between 10°C/min to 60°C/min with increment of 10°C/min respectively. The samples were fabricated via PM route and microwave sintering was carried out in a tubular microwave furnace HAMiLab-V3 in N2 atmosphere purposely to avoid any oxidation and chemical reaction to samples. The microstructure of sintered samples was evaluated using SEM and bulk density and porosity were determined based on ASTM B962 - 17 and the microhardness were determined based on ASTM E384. The optimized heating rate of the sample was selected based on the micro hardness value and total porosity percentage as well as based on SEM microstructure analysis. The results revealed that the optimum heating rate occurred at 20°C/min due to the highest value of hardness achieved which is about 119.28 HV with at the highest bulk density about 6.07 g/cm3 and at the lowest total porosity about 14.55%. SEM micrographs also showed that the diffusion was mostly effective at 20°C/min heating rate compared to others, indicated that significant grain boundary diffusion of Fe matrix into Al2O3 particle was occurred.
      1  47
  • Publication
    Design and development of a cordless screwdriver: An analysis
    ( 2021-07-21)
    Mohd. Nasir Mat Saad
    ;
    Muhamad Farizuan Rosli
    ;
    Shafeeq Ahmad Shamim Ahmad
    ;
    Wan Abdul Rahman Assyahid Wan Ibrahim
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Hashim A.H.
    ;
    Rahman A.S.A.
    ;
    Kamarul Radhi Md Zohid
    ;
    Balakrishnan V.
    The aim of this paper is to focus on some important aspects of the use of cordless screwdrivers in situations of work. Emphasizes on comfort while user uses cordless screwdriver. Descriptors of comfort in the use of hand tools have been collected from interviews. Functionality and physical interaction have been found to be the most important comfort factors in using a screwdriver. The ergonomically modified screwdriver handle provides greater operational efficiency. The findings of this research is significant in contemplating on the differences between discomfort and comfort. Cordless Screwdriver with built-in power of 3.7 kilowatts has been established. A better battery, with a voltage display, was made comfortable for consumers. In addition, the soft grip handle will allow the consumer to have a relaxed grip when using the product.
      1  36
  • Publication
    Development of sustainable lightweight heat insulation panel from elastomeric and polymeric waste
    (AIP Publishing, 2023)
    Wan Abdul Rahman Assyahid Wan Ibrahim
    ;
    Irfan Abd Rahim
    ;
    Nurul Shakira Abd Rahma
    ;
    Mohd Effendi Muhammad Suandi
    ;
    Noorhafiza Muhammad
    The project present about development lightweight sustainable heat insulation panel from waste material. Scrap tyres and plastic waste was used for this purpose. The fabrication process started with scrap tyres is being cut and blends into smaller pieces. Then, the pieces of the material of rubber from scrap tyres are mixed together with the plastic waste material polyethylene at different composition. The mixture of the materials is pressed together using hydraulic press machine and heat are applied to melt the material in order to create the panel by using the mould. There are few tests that are conducted to the panel to find out its weight, volume and density. In order to determine the most suitable sample among the sample, a test is carried out to each sample. This test involved the black box or wooden box and the container by using the thermocouple and probes to measure the temperature. From the both test using black box and the container, the most suitable sample that excellent in insulating the heat is the sample with the bigger composition of rubber which are sample with 95% of rubber and 5% of polyethylene polymer.
      15  1
  • Publication
    Hard-porous-lightweight PM Fe-Cr-Al2O3MMCs sintered under hybrid microwave energy
    ( 2021-07-21)
    Wan Abdul Rahman Assyahid Wan Ibrahim
    ;
    Shayfull Zamree Abd. Rahim
    ;
    Radhwan Hussin
    ;
    Muhamad Farizuan Rosli
    ;
    Mohd Fathullah Ghazli@Ghazali
    ;
    Murizam Darus
    This study reports on the effect of Al2O3 particles on the density of Fe-Cr metal matrix composite (MMCs) produced through PM route then sintered under hybrid microwave energy. The sample was prepared by mixing the Al2O3 particle in 3D-tubular shaker at six different weight percentage of Fe-Cr matrix started from 5 wt.% to 30 wt.% with 5% in increment. The sintering process was performed under controlled N2 atmosphere in a tubular microwave furnace. Determination of bulk density and porosity was done according to Standard Test Method ASTM B962 - 17, while ASTM E384 was used to determine the microhardness. Assessment of the sample was based on density, porosity, hardness and microstructure evaluation. The result show that incorporating the Al2O3 particle were significantly increase the microhardness, decrease the bulk density and increase the porosity of the in Fe-Cr composite.
      2  26
  • Publication
    Current trends and risk factors in low back pain: an ergonomic perspective on prevention and management
    ( 2024)
    Ahmad Humaizi Hilmi
    ;
    Asna Rasyidah Abdul Hamid
    ;
    Wan Abdul Rahman Assyahid Wan Ibrahim
    Low back pain (LBP) is a global health concern, impacting individuals across various professions and age groups. This review explores the critical role of ergonomic factors in the prevention and management of LBP. Occupational risk factors, including heavy lifting, prolonged sitting, non-neutral postures, and repetitive motions, contribute significantly to the rising prevalence of LBP. Professions such as healthcare, law enforcement, and office work are particularly vulnerable due to their physical demands and static postures. Ergonomic interventions, including task redesign, assistive technologies, and workplace modifications, have proven effective in reducing the incidence of LBP. Dynamic seating, lumbar support devices, and wearable technology are among the innovations that have been introduced to promote healthier postures and reduce musculoskeletal strain. Additionally, ergonomic training programs focusing on proper body mechanics and posture correction are essential for long-term prevention. Beyond physical factors, psychosocial and lifestyle elements, such as stress, sedentary behavior, and smoking, also play a role in the development of LBP. Combining ergonomic interventions with health-promoting behaviors, such as regular physical activity and stress management, can significantly reduce the burden of LBP. Technological advancements, including mobile applications and wearable devices, support adherence to home exercise programs, offering continuous feedback for posture correction and movement. This comprehensive review underscores the need for a multidisciplinary approach that integrates ergonomic interventions, technological tools, and lifestyle modifications to manage and prevent LBP effectively in both occupational and everyday settings.
      30  2
  • Publication
    Smart wearables in ergonomic applications recent advances and challenges in human-machine integration
    ( 2024)
    Ahmad Humaizi Hilmi
    ;
    Asna Rasyidah Abdul Hamid
    ;
    Wan Abdul Rahman Assyahid Wan Ibrahim
    Smart wearables have become increasingly integral to ergonomic applications, particularly in healthcare, industrial work, and rehabilitation. These technologies offer significant benefits in enhancing human performance, reducing the risk of injury, and improving user comfort. Exoskeletons, one of the key smart wearable technologies, have seen widespread adoption in industrial settings, assisting workers in physically demanding tasks by alleviating muscle strain and promoting ergonomic posture. The application of machine learning within these wearables further enhances their adaptability, allowing for personalized support based on real-time feedback. In healthcare, wearable sensors provide critical insights into physiological and postural data, enabling continuous monitoring that supports long-term health and rehabilitation efforts. These wearables can track muscle activity, heart rate, and other vital signs, improving patient outcomes through ergonomic design that minimizes discomfort. In addition, soft robotic suits and passive exoskeletons have been developed to assist in mobility rehabilitation, offering a blend of comfort and functionality. Despite these advancements, challenges remain. Smart wearables must balance functionality with comfort, especially as many devices can be bulky or restrictive. The integration of artificial intelligence and machine learning offers solutions to some of these challenges, enabling wearables to adapt dynamically to user needs. However, technical issues such as data processing, sensor accuracy, and battery life continue to limit their widespread adoption. Future developments must focus on miniaturization, energy efficiency, and user adaptability to overcome these barriers, ensuring that smart wearables are both effective and practical for diverse ergonomic applications.
      19  1