Zainal Arifin Ahmad
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View article: Pengaruh Penerimaan dan Penggunaan Aplikasi ChatGPT dalam Kalangan Pelajar Universiti Kebangsaan Malaysia
Pengaruh Penerimaan dan Penggunaan Aplikasi ChatGPT dalam Kalangan Pelajar Universiti Kebangsaan Malaysia Open
ChatGPT (Chat Generative Pre-Trained Transformer) adalah satu bentuk inovasi teknologi kecerdasan buatan generatif (GenAI) yang telah diperkenalkan oleh OpenAI dengan akses global kepada versi GPT-3.5 pada November 2022. Seiring dengan kem…
View article: Harnessing Sustainable Skills for TVET Students in Entrepreneurship and Islamic Finance: A PRISMA Review
Harnessing Sustainable Skills for TVET Students in Entrepreneurship and Islamic Finance: A PRISMA Review Open
Sustainable entrepreneurship is the answer to tackling global challenges like unemployment, social inequality, and environmental degradation. Islamic finance, an alternative financial model, provides a framework for economic entrepreneursh…
View article: The Influence of Niobia Additions on Microstructure, Vickers Hardness and Indentation Fracture Resistance of ZTA Ceramic Composites
The Influence of Niobia Additions on Microstructure, Vickers Hardness and Indentation Fracture Resistance of ZTA Ceramic Composites Open
The effect of small additions of niobium pentoxide (Nb 2 O 5 ) from 0 to 0.7 wt% on the zirconia toughened alumina (ZTA) ceramics sintered at 1600 °C was studied. Based on the results, the small addition of Nb 2 O 5 was discovered to be ab…
View article: Effect of TiO2/Eggshell Composite Using Sol Gel Method Photoanode for Dye-Sensitized Solar Cell Applications (DSSC) and Comparison Using K-Nearest Neighbors Method
Effect of TiO2/Eggshell Composite Using Sol Gel Method Photoanode for Dye-Sensitized Solar Cell Applications (DSSC) and Comparison Using K-Nearest Neighbors Method Open
View article: Emotion Framework in Leadership Programs for TVET and Higher Education Students
Emotion Framework in Leadership Programs for TVET and Higher Education Students Open
View article: Effects of Treated Fritted Dental Porcelain Particles on the Fracture Toughness and Surface Hardness of Poly Methylmethacrylate as Denture Base
Effects of Treated Fritted Dental Porcelain Particles on the Fracture Toughness and Surface Hardness of Poly Methylmethacrylate as Denture Base Open
This research aimed to assess the fracture toughness and surface hardness properties of polymethyl methacrylate (PMMA) reinforced with fritted dental porcelain (FDP) particles at various weight percentage levels. Eighty specimens were prep…
View article: CAN ECO-ENGINEERING MINDS BE ENHANCED? A STUDY OF MALAYSIAN POLYTECHNIC STUDENTS IN GREEN ENTREPRENEURSHIP EDUCATION
CAN ECO-ENGINEERING MINDS BE ENHANCED? A STUDY OF MALAYSIAN POLYTECHNIC STUDENTS IN GREEN ENTREPRENEURSHIP EDUCATION Open
The imperative for sustainable development has heightened focus on eco-engineering and green entrepreneurship. It investigates the role of the KAP Model in shaping students' eco-consciousness and entrepreneurial mindset. While environmenta…
View article: A critical review on the development of multi-geometrical stacked wideband dielectric resonator antenna
A critical review on the development of multi-geometrical stacked wideband dielectric resonator antenna Open
Dielectric resonator antennas (DRAs) use dielectric material as a resonator to accomplish high radiation efficiency and avoid severe conductor loss. The dielectric material that behaves as a resonator is plagued by a number of limitations,…
View article: Effect of high concentration of an ideal donor dopant on the dielectric properties of potassium sodium niobate (KNN) lead-free piezoelectric ceramic
Effect of high concentration of an ideal donor dopant on the dielectric properties of potassium sodium niobate (KNN) lead-free piezoelectric ceramic Open
Barium Carbonate (BaCO3) was selected as dopant to examine its effect to the Potassium Sodium Niobate piezoelectric ceramic properties. In this work, the concentration of Barium was doped until highest stoichiometry disorder for stoichiome…
View article: Investigating quality of steel for building construction: A case study of Nigeria steel industries
Investigating quality of steel for building construction: A case study of Nigeria steel industries Open
Steel reinforcement in building construction is very paramount as the life span of the building depends on the quality of steel reinforcement and the concrete structures. In this study, 25 steel plants with steel rod diameters of 8 mm to 2…
View article: The Compressive Strength and Microstructure of Alkali-Activated Mortars Utilizing By-Product-Based Binary-Blended Precursors
The Compressive Strength and Microstructure of Alkali-Activated Mortars Utilizing By-Product-Based Binary-Blended Precursors Open
Researchers have investigated the feasibility of using ultrafine palm oil fuel ash (u-POFA) as a cement replacement material because of its potential to reduce the environmental impact of concrete production. u-POFA, a by-product of palm o…
View article: Development of Learning Kit and Module for a Technology Design (RBT) Subject: Insights From Needs Analysis
Development of Learning Kit and Module for a Technology Design (RBT) Subject: Insights From Needs Analysis Open
The electronic design process included in the Malaysian secondary school syllabus pose challenges to the teachers as it requires teaching aids to facilitate more effective understanding and practice of the process. Therefore, this study ai…
View article: A Low-Profile Quasi-Loop Magneto-Electric Dipole Antenna Featuring a Wide Bandwidth and Circular Polarization for 5G mmWave Device-to-Device Communication
A Low-Profile Quasi-Loop Magneto-Electric Dipole Antenna Featuring a Wide Bandwidth and Circular Polarization for 5G mmWave Device-to-Device Communication Open
The deployment of the millimeter (mmWave) frequency spectrum by fifth-generation (5G) device-to-device (D2D) wireless networks is anticipated to meet the growing demands for increased capacity. The antenna is regarded of as an important de…
View article: Toughening Mechanisms in Particulate Dental Resin-Based Composites: A Short Review
Toughening Mechanisms in Particulate Dental Resin-Based Composites: A Short Review Open
Resin-based composites represent a unique class of restorative dental materials; however, these composites have severe shortcomings such as low wear resistance which is mainly responsible for the short life-span of the materials. Composite…
View article: Influence of milling process of palm oil fuel ash on the properties of palm oil fuel ash-based alkali activated mortar
Influence of milling process of palm oil fuel ash on the properties of palm oil fuel ash-based alkali activated mortar Open
This work aims to study the influence of milling process on particle size reduction and reactivity improvement of palm oil fuel ash (POFA) as raw materials for the production alkali activated products. Specifically, the quantity of materia…
View article: Mathematical model on the effects of conductor thickness on the centre frequency at 28 GHz for the performance of microstrip patch antenna using air substrate for 5G application
Mathematical model on the effects of conductor thickness on the centre frequency at 28 GHz for the performance of microstrip patch antenna using air substrate for 5G application Open
View article: Mechanical Behaviour of Normal Concrete using Fibre of Pine Tree Needle Leaves
Mechanical Behaviour of Normal Concrete using Fibre of Pine Tree Needle Leaves Open
This research was carried out to study the behaviour of concrete, specifically flexural strength, by incorporating two types of pine needle leaves (green, and brown) recycled as fibre reinforcement in the concrete. The other goal of the st…
View article: Wheel-shaped miniature assembly of circularly polarized wideband microstrip antenna for 5G mmWave terminals
Wheel-shaped miniature assembly of circularly polarized wideband microstrip antenna for 5G mmWave terminals Open
View article: Dry turning of hard 2379 steel using a ZTA5Ce0.7La ceramic cutting insert: A study
Dry turning of hard 2379 steel using a ZTA5Ce0.7La ceramic cutting insert: A study Open
The aim of this work is to evaluate the dry turning ability of zirconia toughened alumina reinforced with 5 wt.% CeO 2 and 0.7 wt.% La 2 O 3 (ZTA5Ce0.7La) ceramics as cutting insert in turning of 2379 steel with hardness of 43 HRC. Triangu…
View article: Dielectric Breakdown Strength and Energy Storage Density of CCTO-ZBS Electroceramic
Dielectric Breakdown Strength and Energy Storage Density of CCTO-ZBS Electroceramic Open
The effect of ZnO-B2O 3 -SiO 2 (ZBS) glass additives to the microstructure and electrical properties of CaCu 3 Ti 4 Oi 2 (CCTO) electroceramic has been successfully investigated in this research. CCTO and ZBS glass additives were prepared …
View article: ĀFĪ, ALLĀHYĀR KHAN
ĀFĪ, ALLĀHYĀR KHAN Open
View article: A Novel Negative Meander Line Design of Microstrip Antenna for 28 GHz mmWave Wireless Communications
A Novel Negative Meander Line Design of Microstrip Antenna for 28 GHz mmWave Wireless Communications Open
The increasing applications for nomadic computing have experienced enormous development over the preceding decade. This has eventually caused the lack of bandwidth. Therefore, to accomplish the need of consumers, compact antennas shall be …
View article: Improving the Gain Performance of 2 × 2 U-Slot Air Substrate Patch Antenna Array Operated at 28 GHz Wideband Resonance for 5G Application
Improving the Gain Performance of 2 × 2 U-Slot Air Substrate Patch Antenna Array Operated at 28 GHz Wideband Resonance for 5G Application Open
In this paper, a 28-GHz dual 2 × 2 U-slot air substrate patch antenna array for 5G application is proposed. The idea of the U-slot antenna was applied in the patch antenna design which intended to decrease the antenna size. The structure o…
View article: Effect of various commercial of Na<sub>2</sub>SiO<sub>3</sub> on compressive strength of Fly ash-based alkaline activated mortar
Effect of various commercial of Na<sub>2</sub>SiO<sub>3</sub> on compressive strength of Fly ash-based alkaline activated mortar Open
This study aimed to assesses the effect of various commercial Na 2 SiO 3 on the compressive strength (CS) of alkaline activated fly ash mortar (AAFM). The three mixture of alkaline activated mortar (AAM) C1, C2 and C3 were prepared from th…
View article: Improving the Gain Performance of Air Substrate Patch Antenna Array Using the Effect of Conductive Material Thickness Study for 5G Applications
Improving the Gain Performance of Air Substrate Patch Antenna Array Using the Effect of Conductive Material Thickness Study for 5G Applications Open
Over the decade, extensive applications of portable electronic devices have progressed enormously. This has ultimately influenced the shortage of bandwidth supply. Therefore, in satisfying the demands of consumers, low-cost antennas are re…
View article: A NOVEL LUMPED LC RESONATOR ANTENNA WITH AIR-SUBSTRATE FOR 5G MOBILE TERMINALS
A NOVEL LUMPED LC RESONATOR ANTENNA WITH AIR-SUBSTRATE FOR 5G MOBILE TERMINALS Open
View article: Influence of La2O3 additions on the microstructure and strength of zirconia toughened alumina
Influence of La2O3 additions on the microstructure and strength of zirconia toughened alumina Open
Despite the impressive recent developments in understanding transformation toughening, tailoring the strength of zirconia toughened alumina (ZTA) ceramics remains a major challenge. To address this chall enge, a simple powder mixing route …
View article: Simulation analysis of fuel cell integration in a hybrid car
Simulation analysis of fuel cell integration in a hybrid car Open
Fuel cell is one of the green technologies that can help reduce toxic gas and decreasing effect of greenhouse gases in the world. This paper attempts to improve simulation model of fuel cell system that is easy to use and at the same time …
View article: A Low-Profile Hybrid Multi-Permittivity Dielectric Resonator Antenna With Perforated Structure for Ku and K Band Applications
A Low-Profile Hybrid Multi-Permittivity Dielectric Resonator Antenna With Perforated Structure for Ku and K Band Applications Open
A wideband hybrid dielectric resonator antenna (DRA) consisting of a rectangular slot patch and a perforated stacked cylindrical dielectric resonator (DR) is proposed. A rectangular slot was etched on the grounding side of a microwave lami…
View article: Compressive Strength Development of Geopolymer Mortar by Utilization Slag and Fly Ash Mixtures
Compressive Strength Development of Geopolymer Mortar by Utilization Slag and Fly Ash Mixtures Open
The paper displays the use of two base solid wastes materials to produce the alkaline-activated binder mortar to reduce the CO2 emission on climate change. The solid materials used in this research were slag and fly-ash to improve the comp…