Digital Commons Network^™

Heavy Metals And Organic Carbon In Sediments Of Seagrass Sediments Of Trang Province, Thailand, Siriporn Pradit, Pornthep Wirachwong, Thongchai Nitiratsuwan, Sujaree Bureekul, Supraewpan Lohalaksanadech, Thawanrat Kobkeatthawin, Monticha Jirajaras, Prakrit Noppradit, Sanya Sirivithayapakorn

Applied Environmental Research

In this study, the accumulation of heavy metals (Cd, Cr, Cu, Fe, and Pb) in water, suspended sediments, sediments, and seagrass in Kalase Bay, Trang Province, Thailand, during the 2024 dry season was investigated. These findings indicate that the enrichment factor (EF) for all the metals was less than 1, suggesting that anthropogenic contamination is not a significant concern in the area. The translocation factor (TF) values were less than 1 for all the metals except Cu, whose TF was greater than 1; however, these values were not statistically significant, indicating limited phytoextraction capacity. The bioconcentration factor (BCF) values for …

Spatial Modeling Of Natural Disaster Risk By Integrating Hazard, Vulnerability, And Exposure Factors Using Geospatial Techniques : Evidence From Mueang Tak District, Thailand, Suphatphong Ruthamnong

Applied Environmental Research

This study presents a comprehensive multihazard risk assessment for Mueang Tak District, Thailand, that integrates hazard, vulnerability, and exposure (H-V-E) dimensions. By utilizing geographic information systems (GIS) and remote sensing, the analytic hierarchy process (AHP) was employed to prioritize critical risk factors. GIS analysis integrated multisource spatial data, including Landsat 9 and Sentinel-2 imagery, CHIRPS precipitation, and SRTM-derived topography, while AHP weights were established on the basis of expert judgment and socioeconomic indices such as the relative wealth index (RWI) and population statistics. The results delineate distinct spatial risk clusters: high landslide potential is concentrated in the steep terrain of …

Carbon Stock Assessment In Sonneratia Apetala Afforested Mangroves : A Case Study From Cox’S Bazar, Bangladesh, Mohammad Ismail, Sayed Abu Johany, Tanmoy Dey, Zakia Sultana Teasa, Trishna Das, Prabal Barua, Tonima Hossain, Sajib Ahmed

Applied Environmental Research

Sonneratia apetala is a key species for mangrove afforestation projects in Bangladesh and plays a crucial role in ecosystem restoration and carbon sequestration. The research on how the total carbon stock (TCS) varies across S. apetala plantations in Cox’s Bazar remains limited. Thus, in this study, the biomass and soil carbon stock were quantified across nine S. apetala afforested sites in Cox’s Bazar to assess spatial variation and influencing factors. The total biomass carbon (TBC) was calculated by summing the aboveground (AGBC) and belowground (BGBC) biomass carbon, while the soil organic carbon stock (SOCS) was determined from the 0–40 cm …

Seasonal Wastewater Monitoring And Quantitative Microbial Risk Assessment Of Escherichia Coli In A University Wastewater System, Pathum Thani, Central Thailand, Natsima Tokhun, Natagarn Tongphanpharn, Weerawat Ounsaneha, Montip Jankeaw, Wiriyabhorn Klomsungcharoen, Patsara Wongsudi, Yawanart Ngamnon, Cheerawit Rattanapan, Kwang Mo Yang

Applied Environmental Research

In this study, the physicochemical properties of wastewater were characterized, and a quantitative microbial risk assessment (QMRA) of E. coli was conducted in the wastewater treatment system of the Faculty of Science and Technology, Valaya Alongkorn Rajabhat University, under the Royal Patronage, Pathum Thani, Thailand (VRU-SciTech). This study was conducted because the current water-quality assessment does not include the QMRA or evaluate the occupa-tional and incidental public risk of infection. Over a one-year monitoring period, this study quantified wastewater generation (~6.09 L person-1 day-1; ~3.21 × 103 m3 year-1) and analyzed its physicochemical parameters and E. coli concentrations. High concentrations …

Performance And Mechanisms Of Activated Natural Coagulants For Efficient Microcystis Removal Via Coagulation–Flocculation In Thailand, Apiradee Sukmilin, Peangtawan Phonmat, Ratcha Chaichana

Applied Environmental Research

Thailand produces fruit peels and seeds rich in natural polymers, which can serve as eco-friendly coagulants to control algal blooms. In this study, banana peel (Musa spp.), orange peel (Citrus sinensis), basil seed (Ocimum basilicum) mucilage, and chia seed (Salvia hispanica) mucilage were used. These activated natural coagulants with aluminum were compared with nonactivated and commercial coagulants (ferric sulfate, ferrous sulfate, and polyaluminum chloride) for Microcystis removal. Phytochemical composition analysis, Fourier transform infrared (FTIR) spectroscopy, and oxidation–reduction potential (ORP) analysis were conducted. The results revealed that banana and orange peels contain phenolic compounds, …

Evaluation Of Soil Moisture Content, Ph, And Dominant Microorganisms In Crude Oil–Contaminated Soil Treated With Cow Dung, Indole-3-Acetic Acid (Iaa), And Simulated Microgravity, Amenze Ovenseri, Tawari-Fufeyin P.

Applied Environmental Research

Crude oil negatively affects soil physicochemical properties and microbial activity, thereby hindering plant growth and posing notable environmental and agricultural issues. The combined effects of cow dung, indole-3-acetic acid (IAA), and simulated microgravity on the recovery of soil degraded by crude oil were explored using Zea mays as the test plant. Soil was contaminated with crude oil at different concentrations (0%, 1%, 3%, and 5% v/w), with each concentration comprising eight treatments: cow dung, Zea mays seeds exposed to microgravity, and IAA alone or in combination. Changes in plant height, soil pH, soil moisture content, and soil microbial diversity were …

Evaluating Sediment Control Strategies Using Swat Based Bmp Assessment In A Tropical Highland Watershed, Northern Thailand, ฺBanchongsak Faksomboon, Wilailak Suanmali

Applied Environmental Research

Soil erosion remains a critical environmental challenge in the tropical highland watersheds of Southeast Asia, where steep terrain, intense monsoonal rainfall, and intensive land use interact to accelerate sediment generation and downstream degradation. This study aims to quantify spatial patterns of sediment yield and to systematically evaluate the effectiveness of individual and combined best management practices (BMPs) at both the watershed and subwatershed (SWW) scales using the Soil and Water Assessment Tool (SWAT) in a tropical highland watershed in northern Thailand. Baseline simulations reveal pronounced spatial heterogeneity in erosion severity, with substantial portions of the watershed exhibiting moderate to extreme …

Metal–Organic Frameworks : Opportunities And Challenges In Nutrient Recovery, Suchana Amnuaychaichana, Chi-Wang Li, Pongsak (Lek) Noophan, Sumeth Wongkiew

Applied Environmental Research

Nutrient recovery from waste streams is a critical strategy for promoting sustainable agriculture and mitigating environmental degradation. Essential nutrients commonly present in organic waste and wastewater, such as nitrogen and phosphorus, can be reclaimed and reintegrated into agricultural systems. Metal‒organic frameworks (MOFs), which are composed of metal clusters coordinated with organic ligands, have emerged as promising materials for adsorption and have the potential for nutrient recovery and pollutant removal because of their high porosity, large surface area, and tunable physicochemical properties. These attributes enable MOFs to serve in diverse applications, including heavy metal adsorption, organic pollutant degradation, and nutrient transformations. …

Exploring Consumers’ Intention And Behavior In The Circular Economy : Evidence From Vietnam, Tuan Hoang Nguyen, Vo Minh Thang Phan

Applied Environmental Research

This study aims to address the key gaps in understanding the factors influencing the intention–behavior relationship of consumers in the context of the circular economy (CE). Grounded in the theory of planned behavior (TPB), this research extends the framework by integrating social pressure, attitudes toward green consumption, and the availability of CE products as crucial components that shape intention and behavior. Data were collected from 603 Vietnamese consumers and analyzed using partial least squares structural equation modeling (PLS-SEM). The results confirm the core TPB constructs, with perceived behavioral control emerging as the most influential factor. Notably, attitude toward green consumption …

Sustainable Approach For The Removal Of Cu(Ii) From Aqueous Solutions Using Lotus Seedpod-Alginate Composite Biosorbents, Lan Tran-Nguyen, Hue Tran Nguyen-Le, Hong T Hi Anh Nguyen, Tran Nguyen-Phuong-Dung, Ly Kim-Phung, Huynh Quoc-Khanh, Nguyen Minh-Nhut, Phuong Lan Tran-Nguyen

Applied Environmental Research

Turning waste or agricultural byproducts into valuable products has recently become a concern of scientists. In this study, the facile and cost-effective synthesis of a biocomposite derived from lotus seedpod (LS) and alginate (AG) was further applied for Cu2+ ion uptake from aqueous solutions. SEM images revealed the layered structures of the composites, which were thin and irregularly stacked sheets of a complex 3D network. The abundant functional groups on the surface of the LS-based material and its negative zeta potential value of -37.50 mV also facilitated efficient Cu2+ removal. Adsorption results revealed a Cu2+ adsorption efficiency (AE) and experimental …

Tree Composition And Carbon Sequestration Potential Of A University Campus In Bangkok, Thailand, Chaiwat Boonpeng, Pawanrat Butrid Butrid, Marisa Pischom, Satatip Noikrad

Applied Environmental Research

Trees play important roles in atmospheric carbon dioxide (CO2) absorption and climate change mitigation. The objective of this study was to assess tree characteristics and carbon sequestration potential at Ramkhamhaeng University (Hua Mak Campus), Bangkok, Thailand. Tree attributes, including species composition, abundance, diameter at breast height (DBH), and tree height, were recorded. Tree biomass, carbon storage, and CO2 sequestration were estimated using appropriate allometric equations. A total of 2,149 trees were recorded in the study area, corresponding to a tree density of 45.8 trees ha-1. The tree community was dominated by the palm family (Arecaceae), while Terminalia ivorensis was the …

Development Of A Deep Neural Network Model To Predict Pm2.5 Concentrations Based On Key Factors Affecting Air Pollution In Bangkok, Natsuda Klinklan, Tanawut Poothong, Nuttiwut Areeratphitak, Viganda Varabuntoonvit

Applied Environmental Research

PM2.5 is a significant air pollution concern in Thailand, particularly in urban areas such as Bangkok, where the 24-hour average concentration frequently exceeds national ambient air quality standards during severe seasonal episodes. Road transportation is the primary source of PM2.5 in Bangkok, accounting for 73% of total emissions, according to the Pollution Control Department. In this study, a predictive modeling framework is developed to investigate the relationship between vehicle count and the mass concentration of PM2.5 from vehicular exhaust emissions. Convolutional neural networks (CNNs) and recurrent neural networks (RNNs) are employed for vehicle detection and counting, whereas a long short-term …

Weekly Spatiotemporal Dynamics Of Forest Fire Hotspots In Tak Province, Thailand : A Gis-Based Directional Analysis, Suphatphong Ruthamnong

Applied Environmental Research

Forest fires are recurrent dry-season hazards in northern and western Thailand, yet their short-term spatial dynamics remain insufficiently understood. In this study, weekly spatiotemporal dynamics of forest fire hotspots in Tak Province, Thailand, were examined using Visible Infrared Imaging Radiometer Suite (VIIRS) active-fire data and GIS-based directional analysis. Hotspots from five fire seasons (2021–2025) were grouped into 24 weekly intervals beginning on 1 December. The analysis integrated weekly hotspot counts, forest-type compositions, mean-center trajectories, standard deviational ellipses, temporal changes in topographic characteristics, and fishnet-based hotspot persistence mapping. The results revealed that fire activity was highly concentrated during the middle of …

Effects Of The Psb-To-Ow Ratio And Light Intensity On Biogas Composition During Phototrophic-Assisted Anaerobic Fermentation Of Organic Waste, Kridsana Jirasansawat, Sirilak Prasertkulsak, Nitiwist Teangthai

Applied Environmental Research

The integration of phototrophic processes into anaerobic fermentation offers a promising strategy for improving biogas quality; however, the combined effects of the photosynthetic bacteria-to-organic waste (PSB-to-OW) ratio and light intensity remain unclear. In this study, the photosynthetic bacteria (PSB)-assisted anaerobic fermentation of municipal organic waste under varying PSB-to-OW ratios and light intensities was evaluated. An optimal PSB-to-OW ratio of 1:2 resulted in significantly higher CH4 concentrations and lower CO2 and H2S concentrations than the other tested ratios did (p < 0.05). At this ratio, moderate illumination (2000 lx) resulted in the highest CH4 concentration (68.2 ± 0.3%), compared with 1000 lx (61.5 ± 0.4%) and 4000 lx (63.1 ± 0.5%). Under illumination, the CO2 and H2S concentrations were lower than those under dark conditions, indicating a more favorable biogas composition. Kinetic analysis indicated that CO2 and H2S exhibited apparent first-order behavior under illumination, with the highest rates occurring at 2000 lx (kH2S = 0.093 day-1; kCO2 = 0.059 day-1), suggesting light-dependent transformation processes. Metagenomic analysis revealed a microbial community dominated by sulfide-oxidizing (Chlorobium sp.), photoheterotrophic (Rhodopseudomonas sp.), and syntrophic bacteria, supporting coupled carbon conversion and sulfur transformation. Overall, optimization of the …

Conditional Admission And The Hazards Of Lawyer Assistance Programs Operating Without Transparency Or Oversight, Paula Schaefer

Oklahoma Law Review

No abstract provided.

Two Dogmas Of Free Speech Doctrine, David R. Dow

Oklahoma Law Review

No abstract provided.

Preempted Or Permitted? State Immigration Enforcement, Federal Preemption, And The Future Of Immigration Policy, Aryn Kerr

Oklahoma Law Review

No abstract provided.

Oklahoma’S Bible Policy: The Evolving Establishment Clause From Lemon To Kennedy, Carson Douglas Shaw

Oklahoma Law Review

No abstract provided.

The Best Of Both Worlds: How Artificial Intelligence Can Balance Precision And Flexibility In Article 9 Search Logic, Lindsay Martin Mayes

Oklahoma Law Review

No abstract provided.

Abortion And State Taxes: Unexpected Parallelism, Eric Smith

Oklahoma Law Review

No abstract provided.

Beyond Repeal Of Flsa Section 14(C): A Policy Path To Competitive Integrated Employment, Natalie Spear

Oklahoma Law Review

No abstract provided.

Marijuana, Marinol, And Chapter 11: The Federal Roadblock To Bankruptcy Protection, Grace Griggs

Oklahoma Law Review

No abstract provided.

Modern Research Tools Supporting Science At Andrews University, Peter Lyons, Henry Navarro

Faculty Publications

No abstract provided.

Participatory Work Design Intervention In A Disability Support Organization: Effects On Job Demands, Social Support, And Burnout, Arian Kunzelmann, Connie Deng, Lucinda Iles, Ryan Cheng, Helena Nguyen, Anya Johnson, Sharon K. Parker

Research outputs 2022 to 2026

This study evaluates the effectiveness of a participatory work design intervention to improve job quality and mental well-being in a disability support organization. We investigate whether the intervention is associated with changes in burnout (i.e. disengagement, work-related, client-related), and we assess the changes in work design through which the intervention has its effects. We hypothesized that the effects of the work design intervention on burnout occur via changes in social support (i.e. co-worker instrumental and emotional support) and job demands (i.e. role conflict, time pressure). 72 participants were involved (N = 21 in the intervention group, 66.7% female; N = …

Playworld Translanguaging: A Place-Based Approach For Translanguaging Play Pedagogy In Early Childhood, Christine Robinson, Carly Steele, Toni Dobinson, Grace Oakley, Samina Manado, Katie Grace, Graeme Gower

Research outputs 2022 to 2026

Conceptualised from a vision to honour children’s languages, agency and cultural ways of knowing, this research presents findings from a place-based translanguaging play pedagogy for early childhood called Playworld Translanguaging. In the remote Kimberley of Western Australia, researchers collaborated with educators in a Kindergarten/Primary/Yr 1 class of mostly Aboriginal children who have Bardi Jawi as their ancestral language, co-designing ways to revitalise this language through play pedagogy in ways intimately connected to place. Our Playworld Translanguaging approach reimagined Conceptual PlayWorlds (Fleer, 2018) with the intention of integrating pedagogical translanguaging. Following Indigenist research principles, critical participatory action research (CPAR) was the …

When Dying Patients Fall Silent: How Nurses Navigate Decision-Making In The Last Days Of Life—A Qualitative Study, Tricia O'Connor, Aileen Collier, Karen Strickland, Carla Thamm, Catherine Paterson

Research outputs 2022 to 2026

Aim: To explore nurses' perspectives on decision-making processes and influencing factors when caring for unresponsive dying patients in the last days of life. Design: A qualitative interpretive study.

Methods: Using purposive recruitment and informal peer referral, twenty-one nurses from a specialist palliative care service in a metropolitan city in Australia were interviewed between July 2024 and January 2025. Data were analysed using reflexive thematic analysis. Decision-making theory was used as an interpretive lens.

Findings: Two themes were generated: ‘The patient as an absent presence’ and ‘Enacting agency through embodied cognition and relational attunement’, together with five interconnected subthemes. The analysis …

Mental Health Professionals’ Perspectives On Essential Elements Of Telehealth Family Psychoeducation For Major Depressive Disorder: An Exploratory Study, Obumneke Obieche, Jing Yu Tan, Sita Sharma, Daniel Bressington, Tao Wang

Research outputs 2022 to 2026

Family-inclusive interventions, such as family psychoeducation (FPE), improve outcomes in major depressive disorder (MDD), particularly when tailored to the needs of individuals with MDD, their families, and carers. This study explored mental health professionals’ (MHPs) perspectives on the essential elements of telehealth FPE for MDD, including patients’ and their families’ informational and support needs. An exploratory cross-sectional study was conducted as part of the Supportive Program for Advancing Recovery, Knowledge, and Empowerment in Depression (SPARKED) research project, using an online questionnaire targeting MHPs within a regional area of Australia. Data analysis included descriptive statistics and quantitative and qualitative content analysis, …

Psag: Projection-Based Stabilized Attribution Guidance For Online Continual Learning, Hang Yu, Kun Hu, Zhuqiang Lu, Steven Qiang Lu, Zhiyong Wang, Fengxiang He

Research outputs 2022 to 2026

Online Continual Learning (OCL) aims to incrementally learn from non-stationary data streams in a one-pass setting, facing the dual challenges of catastrophic forgetting and insufficient training. These challenges intensify the stability-plasticity dilemma, where pre-serving old knowledge conflicts with acquiring new information. In this paper, we propose Projection-based Stabilized Attribution Guidance (PSAG), a modular framework that leverages gradient-based attributions as active guidance signals to selectively preserve task-relevant representations. Our framework consists of three complementary mechanisms: (1) Attribution-Guided Feature Modulation (AGFM) that anchors critical features in the representation space; (2) Importance-Aware Loss Reweighting (IALR) that prioritizes informative samples at the loss level; …

Raising Children In Precarious Spaces: Coping Strategies Of Young Mothers In Urban Slums Of Accra, Ghana, Portia Nana Ama Brempong, Samuel Eduaful, Kwabena Frimpong-Manso, Phoebe Afram

Research outputs 2022 to 2026

This study examined coping strategies of young mothers raising children in urban slum communities in Accra, Ghana. Guided by Jack’s Ecological Influences Framework and Interpretative Phenomenological Analysis, interviews were conducted with 20 young mothers aged 18–35 in Old Fadama and African Eleven. The findings revealed five strategies: spiritual coping and religious reliance; adaptive food management strategies; psychological endurance and emotional regulation; community-based support networks; and informal financial management and credit utilization. Environmental stressors, including crime and social disorder, shaped mothers’ parenting experiences and created tensions in transmitting values to their children. These findings suggest that young mothers’ coping strategies are …

Ethical Positionings Of Risk And Harm For Adolescents Encountering Sexual Content Online, Lelia Green, Giselle Woodley, Carmen Jacques, Elisabeth Staksrud, Liza Tsaliki, Brian O’Neill, Debra Dudek, Despina Chronaki, Thuy Dinh, Kelly Jaunzems

Research outputs 2022 to 2026

This paper interrogates the ethical complexities of talking with 12 to 17-year-olds about sexual content online. Authors were granted ethics approval by the Edith Cowan University Human Research Ethics Committee (2019-00583-GREEN) with three other participant countries translating Australian ethical protocols into their national contexts: Greece, Ireland and Norway. This paper addresses the four national contexts and examines the ethical issues arising for different countries’ ethics procedures when researchers conduct sensitive research with adolescents. Given widespread concern around the risk that children will be ‘sexualised’ by encountering sexual content online the ethical procedures adopted in each national context, and the way …