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The Effect of Fertilization on Growth Response of Porang (Amorphophallus oncophyllus Prain) in Dipterocarp Forests, East Kalimantan Indonesia
No full textThe use of forest land under dipterocarp for agroforestry is hindered by the problem of low fertility, necessitating the application of fertilization from organic materials, such as manure, compost, or biochar. These materials provide essential nutrients, including nitrogen, carbon, phosphorus, and potassium, increase cation exchange capacity (CEC), neutralize the pH, and enhance soil texture and water
retention. This study aims to determine the effect of fertilization on the growth of Porang in the dipterocarp forest in PT Utama Damai Indah Timber East Kalimantan. It was conducted from August 2021 to July 2022. A completely randomized design (CRD) was used with three replications at five treatment levels: manure 1000 g/plant (P1),
compost 1000 g/plant (P2), biochar + manure 1000 g/plant (P3), biochar + compost 1000 g/plant (P4), and control without fertilization (P0). Data analysis was performed using ANOVA, followed by the Duncan test at a 10% level. The results showed that applying organic fertilizer enhanced soil’s physical and chemical properties significantly. The combination of biochar and manure, at 1000 g/plant,
proved to be the most effective treatment for increasing the height and yield of Porang compared to the control and other treatments
Silica/Polyimide Mixed Matrix Membrane for CO2/CH4 and O2/N2 Gas Separation : A Computational Approach
No full textSilica-incorporated polyimide (PI)-based mixed matrix membranes (MMMs) are emerging as promising candidates for gas separation. However, experimental evaluation of their performance is challenging due to the complex interactions between polymers and fillers and limitations in isolating individual transport mechanisms. This study employs Monte Carlo and molecular dynamics (MD) simulations to investigate the solubility and diffusivity of CO2/CH4 and O2/N2 in silica/6FDA-ODA PI MMMs with varying silica loadings (0–20 wt%). The mixed gas compositions are chosen to reflect real-world conditions, as 30% CO2 in CO2/CH4 mixtures, representative of sour gas in natural reserves, and 21% O2 in O2/N2 mixtures, mimicking air composition. Results indicate that incorporating 10 wt% silica enhances CO2 permeability by 270% and CO2/CH4 selectivity by 136% compared to pristine 6FDA-ODA PI. For O2/N2 separation, an O2 permeability of 23.59 and selectivity of 3.11 were achieved. These findings align well with the experimental literature, with 0.01%–10.4% deviation. Benchmarking confirms superior permeability over reported membranes, highlighting the potential of silica/6FDA-ODA PI MMMs for efficient gas separation. This study provides valuable molecular-level insights, paving the way for the rational design of high-performance membranes for industrial applications
Examining the Relationship Between TPACK Knowledge and Integration of Educational Technology Tools Among In-Service Chinese Language Teachers in Rural China
Get PDFThis study examines the role of Technological Pedagogical Content Knowledge (TPACK) in Educational Technology (EdTech) integration among in-service Chinese language teachers in rural China. Using a cross-sectional survey of 506 teachers, findings indicate that Technological Pedagogical Knowledge (TPK) is the strongest predictor of EdTech adoption, significantly enhancing instructional efficacy and adaptability. Technological Knowledge (TK) and Technological Content Knowledge (TCK) also contribute, while Pedagogical Knowledge (PK) and Content Knowledge (CK) show minimal impact. The study highlights the need for TPK-focused professional development and cost-effective digital solutions to bridge rural resource gaps and promote equitable digital learning.
Keywords: TPACK, educational technology integration, in-service teachers, rural education, teacher professional developmen
Pekeliling Pentadbiran Bil. 10 Tahun 2025: Pemakluman Pindaan Takrifan Dasar Kesihatan Mental Pelajar Universiti Malaysia Sarawak (UNIMAS)
Get PDFCRITICAL DISCOURSE ANALYSIS OF CAKNA DIRI : A MODULE FOR SEXUAL AND REPRODUCTIVE HEALTH EDUCATION FOR MALAYSIAN PARENTS
Get PDFThis Critical Discourse Analysis (CDA) of the Cakna Diri Module explores how the parenting module, developed by Lembaga Penduduk dan Pembangunan Keluarga Negara (LPPKN), reflects and shapes power dynamics, ideologies, and social practices in the context of parenting sexuality in Malaysia. Utilizing Norman Fairclough’s CDA framework, the study examines how language constructs relationships of authority, conveys cultural and religious values, and communicates moral responsibilities related to SRH. The module emphasizes Islamic principles and conservative social norms, particularly regarding gender roles, sexuality, and parental guidance. Through analysis, the study highlights how the module frames issues such as pre-marital sex, boundaries, and family structures, while reinforcing parents' roles as moral gatekeepers. Furthermore, this CDA addresses how the module responds to societal concerns over youth behaviour, engaging with discourses of modernity and cultural identity in Malaysia. This analysis provides valuable inpu
Nanoscale Zerovalent Iron Grafted with Graphene Oxide : A Dye Adsorption Study
Get PDFMethylene blue (MB) removal from aqueous solutions were studied using nanoscale zero valent iron/graphene oxide (nZVI/GO) composites, which were synthesized. Nanoscale zero valent iron (nZVI) and graphene oxide (GO) were used for comparison. It was followed by Fourier-transform infrared spectroscopy (FTIR) analysis and followed by Scanning electron microscope analysis (SEM), X-ray diffraction (XRD) and Brunauer–Emmett–Teller (BET) analysis for sample characterization. The variable in this case included the initial concentration of MB, which was varied from 200, 250, and 300 mg/L and the contact time, which was varied between 0–90 min. The pH and mass of adsorbent was kept constant at 7 and 0.5 g respectively. Outcomes were indicative that the highest removal of MB was at 92.75% for nZVI/GO composite at 200 mg/L of MB. The experimental data was fitted on to the Langmuir, Freundlich and BET adsorption isotherm models which gave R2 > 0.95. This can be attributed to high favorability of adsorption taking place in many layers. The nZVI/GO adsorbent would follow the pseudo-first-order kinetic model showing an R2 value of 0.99, 0.94, and 0.93 for from 200, 250, and 300 mg/L of MB, respectively. Furthermore, Boyd's external diffusion equation model was applied to calculate the external diffusion. The finding indicated high external diffusion with R2 > 0.99. The results from this paper are attributed to the simplistic generation of nZVI/GO composite and its effect on the removal of MB from aqueous solution. The significance of this study would be that nZVI/GO composites have been only recently being experimented for dye removal and are proving to be an extremely efficient form of adsorption according to recent studies
Timonius arabii (Rubiaceae: Guettardeae), a new species from Bau limestone, Sarawak, with notes on its pollination ecology.
No full textOur understanding of the pollination ecology of Timonius (a dioecious genus) is limited to deducing their pollination syndrome based on floral traits. Through a series of field surveys on several populations of Timonius as a prerequisite to studying their pollination ecology, a new species from a limestone hill in northern Dered Krian National Park in Bau, Sarawak, Malaysia is described. The new species, Timonius arabii, and two other co-occurring congeners were compared in terms of morphology and ecology, in relation to the unique site conditions. Timonius arabii is associated with phalaenophily, as inferred from its yellow, short tubular, faintly fragrant, nectar-producing flowers which open around dusk in both staminate and pistillate individuals. The anthetic period in male flowers typically spans only one night but may last 2–3 days in female flowers. Floral visitors monitored from dusk to dawn over a 7-day observational period show that the flowers attracted up to 23 floral visitor types/species belonging to Coleoptera, Thysanoptera, Lepidoptera, Diptera and Orthoptera, with most species belonging to moths. Two geometrid moths, Eumelea biflavata and E. florinata, have the highest visitation rate to female flowers, probably indicating their role in the pollination of the species. Further study is needed to demonstrate this, while also not excluding the potential role of other moth species as well as thrips and weevils as pollinators. Our preliminary observation provided important baseline data needed for a better understanding of the plant–pollinator relationships in Timoniu
The Ring Ladies of Semban
Get PDFFASA 6.0: Malaysia Negaraku is a visual anthology that captures the spirit and complexity of Malaysian identity through the art of photography. Developed by the Department of Photography and Creative Imaging, UiTM Perak, in collaboration with Humanika Artspace in Bandung, Indonesia, the book features 27 photographic works by Malaysian artists, ranging from students to professionals. These images explore themes such as cultural heritage, community, tradition, and national symbolism. Artist statements and critical reflections offer deeper insight into each piece, connecting personal narratives with national discourse. Set against the backdrop of cross-cultural dialogue in Bandung, the project affirms photography as a medium of storytelling, preservation, and transformation. This book invites readers to reflect on the role of visual art in shaping collective memory and imagining Malaysia’s future
Family Counseling for Mothers on Household Resilience on the Indonesia-Malaysia Border
Get PDFThis research is motivated by the importance of the resilience of the role of wives of migrant workers who have Long Distance Relationship (LDR) status in increasing household resilience. The counseling process provides hope to help mothers face and solve family problems with various factors and challenges in border areas. This study aims to identify and provide treatment using family counseling. This study uses a case study approach to study, explain, and interpret the role of mothers in household resilience. The research instruments used were in-depth interviews, observation, and individual counseling. Through this study, it was concluded that counseling for wives who are in a long-distance relationship in their household is very much needed to strengthen household resilience. However, this counseling should be done routinely, at least once a month, considering that wives generally cannot express their problems to others, which results in their inner conflict. This research is importantbecause the important role of family counseling in this study is to assist mothers in dealing with crisis problems, finding appropriate solutions, and developing the ability to work together in the family
Forest Stand Characteristics and Their Correlation with Carbon Stock in Sarawak Forest
No full textBorneo’s primary rainforest is one of the world’s oldest and most extensive forests. Heterogeneity in the environment and biogeography made these forests rich in tree species composition and diversity. It has been recognized that forests have proven to be a significant contributor to recovering the excessive carbon in the atmosphere into ecosystem pools. Forest carbon stock is directly linked to forest biomass. Factors that increase tree biomass such as tree diameter, basal area, wood density, and species composition will subsequently increase carbon storage. This study examined the influence of forest stand structure attributes and species composition on forest carbon stock. Two logged-over forests, namely Bukit Durang and Saremas 1 Div 5 and two primary forests, Lambir Hills National Park and Kubah National Park, were selected for this study. Vegetation analysis and the line transect sampling method were carried out in all study areas. Twenty-five 20 m x 20 m quadrates were established in each study area. All trees above DBH of 10 cm and above were enumerated. Forest stand structures and vegetation indices were determined. Aboveground biomass (AGB) of all enumerated trees was calculated using a non-destructive method and converted to carbon stock. The Pearson correlation analysis was performed to determine the correlation between carbon stock forest stand attributes and species composition. The forest structure among the study areas has no variation regarding tree density, number of families and number of genera. However, they differ in terms of basal area and number of species. The highest basal area was recorded in Lambir Hills National Park, while Saremas 1 Div 5 and Kubah National Park exhibited the greatest number of species. The study areas are dominated by the family Dipterocarpaceae, followed by Euphorbiacae. Other families that are commonly found in the study areas include Burseraceae, Anacardiaceae, Lauraceae and Moraceae. The only dominant genus is Shorea, and other genera vary between the study areas. The dominant species varies among the study areas. Higher species diversity indices were computed for Bukit Durang and Saremas 1 Div 5. The logged-over forests were found to have a high number of fast-growing species compared to the primary forests. Tree diameter distributions revealed the reverse J-pattern indicative of all the forest areas studied in a state of equilibrium that can regenerate naturally. Dipterocarpaceae and the genus Shorea recorded the highest carbon stock among all the families and genera. Pearson correlation analyses revealed positive correlations between carbon stock and tree diameter, suggesting that large trees store large amounts of carbon. A weak correlation was also observed between carbon stock and species composition. However, other factors influencing the forest carbon stock are likely possible. Thus,
further studies are recommended to include more variables