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UNIMAS Open Access Repository
Managed by Perpustakaan Tun Abdul Rahman Ya'kub, Universiti Malaysia Sarawak
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Recent Submissions
A Web-Based Invoice System
(Universiti Malaysia Sarawak, 2025) Antonio Spencer Anak Hillary Jugah
Recycling Heroes: A Gamified Learning Experience using Roblox with AI Chatbot Guidance
(Universiti Malaysia Sarawak, 2025) Anis Ezzaty Binti Mohd Saidi
CLASSIFYING ATTENTION STATES FROM BRAIN SIGNALS USING CONVOLUTIONAL NEURAL NETWORK (CNN)
(Universiti Malaysia Sarawak, 2025) Angelina Anak Heroldson
POME-derived Ag/Bi2MoO6/TiO2 ternary nanocomposite: Structural design, optical properties, and multifunctional photocatalytic performance
(Elsevier B.V., 2026-04-26) Devagi Kanakaraju; Danielson Ngo Joseph; Ying Chin Lim; Khairul Anwar Mohamad Said; Micky Vincent; Md. Rezaur Rahman; Faculty of Resource Science and Technology
The development of visible-light-responsive, multifunctional photocatalysts is critical for advancing solid-state materials for environmental and antimicrobial applications. Conventional Ag/TiO2 photocatalytic systems
offer a promising solution for visible-light responsiveness and antimicrobial properties, but often suffer from poor stability and recovery, as well as complex synthesis routes. In this work, a ternary Ag/Bi2MoO6/TiO2 (ABMOT)
heterojunction photocatalyst was synthesized via a green, microwave-assisted approach using palm oil mill effluent (POME) as a natural reducing and stabilizing agent, thereby addressing waste valorization alongside
material fabrication. Structural, morphological, and optical properties were systematically investigated using FTIR, XRD, PL, XPS, TEM, SEM-EDX, and UV–Vis DRS, thereby confirming the successful formation of a heterojunction and the enhancement of visible-light absorption. The ABMOT nanocomposite achieved 97.2% degradation of oxytetracycline under visible light irradiation at an optimal dosage of 0.6 g/L, attributed to its strong adsorption capacity, pollutant tolerance, and structural stability over four successive cycles. In addition, ABMOT imparted notable antibacterial activity against Escherichia coli and Staphylococcus aureus, demonstrating its multifunctional nature. To overcome the recovery limitations of slurry photocatalysts, ABMOT was immobilized in polyacrylonitrile (PAN) membranes via the phase inversion, resulting in improved hydrophilicity, porosity, water flux, and pollutant rejection. This study presents a sustainable approach to designing multifunctional ABMOT ternary photocatalysts with enhanced optical and physicochemical properties, providing insights into circular-economy-driven solid-state materials for advanced separation and photocatalytic
technologies.
Male Electorate and Electoral Mandates: Regression Analysis in Sarawak State Elections (2006–2021)
(Geo Publishing, Toronto Canada, 2026-04-22) Mohammad Razi Sitam; Tarmiji Masron; Azizul Ahmad; Asykal Syakinah Mohd Ali; Yoshinari Kimura; Faculty of Social Sciences and Humanities
This study examines the role of the male electorate in determining electoral outcomes in Sarawak's state elections from 2006 through 2021. In doing so, it addresses a gap in the literature: previous work has highlighted gender-specific turnout effects (e.g., strong associations between female turnout and victory margins), but the specific influence of the male electorate has not been separately quantified. Using official constituency-level data from four election cycles, we employ Pearson correlation and simple linear regression to model the relationship between the number of registered male voters and the winning candidate's vote total. In the 2006–2016 period, the male electorate size strongly predicted the winner's votes (adjusted R2 ≈ 0.73–0.86 each cycle), with a near-one-to-one slope indicating that, on average, every additional vote for the winner corresponded to roughly one additional registered male voter. These findings suggest a tightly coupled mobilization of male voters alongside victorious campaigns. By contrast, in the 2021 election this relationship weakened dramatically (adjusted R2 ≈ 0.33), implying that new factors disrupted the prior pattern. The collapse of the male-vote association coincides with Malaysia's recent enfranchisement of 18–20-year-olds and changing campaign dynamics, consistent with studies showing that youth turnout did not simply replace older patterns. The results imply that while male voter mobilization was a reliable strategic focus in 2006–2016, electoral success in Sarawak's new landscape requires engaging a broader, more diverse electorate. These findings underscore the importance of reconsidering traditional demographic assumptions under evolving political conditions.