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BathySAR-Net: An Artificial Neural Network-Based Model For Predicting Intertidal Zone Depth Using Sentinel-1 Synthetic Aperture Radar (SAR) Imagery
No full textCoastal depth monitoring plays a crucial role in navigation and environmental management but is often constrained by the high operational costs and accessibility issues of conventional surveys. To address these challenges, this study implements "BathySAR-Net," an Artificial Neural Network (ANN) model designed to predict sea depth using Sentinel-1 Synthetic Aperture Radar (SAR) imagery combined with BATNAS bathymetric data. The model utilizes a Multilayer Perceptron (MLP) architecture to capture the complex, non-linear relationships between radar backscatter coefficients and water depth. Evaluation using robust K-Fold Cross Validation yielded a Root Mean Square Error (RMSE) of 8.7060 meters and a coefficient of determination (R²) of 0.0838. While the model demonstrated improved stability in deeper zones (10–15 meters), predictive performance in shallow intertidal areas (<5 meters) remained limited due to significant radar signal noise and data scarcity. These findings suggest that while SAR-based ANN offers a promising, accessible alternative for bathymetry, further integration of hydrodynamic variables is essential to resolve nearshore dynamics effectively
Potential of Edu-Ecotourism Based on OTEC Utilizing Indonesian Post-Operation Offshore Oil/Gas Facilities
No full textIndonesia is striving to meet its growing electricity demands in a sustainable way, by moving away from oil and gas sources. The government, particularly in East Kalimantan, is considering the repurposing of the offshore facilities for Ocean Thermal Energy Conversion (OTEC), which not only provides a clean and sustainable electricity, but also offers additional benefits such as agricultural and aquaculture products. This study will look at how OTEC may be integrated into an edu-ecotourism concept, which aims to promote renewable energy technology and create a sustainable economy that benefits local communities and stakeholders. To meet the study's aims, research of the possible use of OTEC as an edu-ecotourism attraction will be conducted, through papers that are reviewed from previous studies to further the understanding and the potential implementation of OTEC for edu-ecotourism. The OTEC itself is planned to have the capability of producing around 20 kW of net power. Therefore, analysis and review of potential uses and benefit of OTEC is crucial to integrate the multi-functionality of OTEC to cater not just to the goal of creating an edu-ecotourism attraction, but also to the various needs of the various stakeholders, that have a part or affected by this project
Evaluation of Infrastructure Condition in the Transmigration Area to Support Regional Development (Case Study: Labangka Transmigration Area)
No full textThis study evaluates the condition of public facilities and infrastructure in the Labangka Transmigration Area as a basis for strengthening area development grounded in local potential. The evaluation was conducted through descriptive analysis, spatial analysis, content analysis, and SWOT and PESTEL approaches to identify existing conditions, service accessibility, and strategic intervention needs. The findings indicate that educational and health infrastructure in the area remains insufficient, characterized by limited facilities at the secondary education level and the absence of referral-level health services. In addition, most Posyandu facilities and primary education infrastructure are in substandard to unfit condition. The road network also exhibits substantial structural gaps, with a predominance of severely damaged and unpaved segments, particularly in Labangka Village, Suka Mulya Village, and UPT Prode SP III, thereby hindering accessibility and reducing logistical efficiency. The accessibility analysis reveals pronounced spatial disparities in education and health services, which may further exacerbate social inequality. These findings underscore the need for place-based prioritization of basic infrastructure development to foster a more livable, productive, and sustainable region
Mathematical modeling and numerical analysis of intermediate-temperature water (steam) electrolysis cell performances
No full textA physicochemical model of an intermediate-temperature water (steam) electrolyzer based on a proton exchange membrane (PEM) was developed. The results of numerical modeling provide recommendations for membrane-electrode assembly (MEA) parameters based on the required electrolyzer operating conditions. Specifically, electrocatalytic layer thicknesses can be recommended to ensure high electrolyzer performance with optimal platinum metals content. The importance of sufficient ionomer in the electrocatalytic layers is demonstrated
Numerical simulation and experimental investigations of the 3D simultaneous heat and mass transfer in a drying system operating under forced convection mode
No full textDrying agricultural products and other porous media is typically done in the open sun, which is unhygienic, labour intensive, and dependent on varying weather conditions. Designing an efficient drying system requires a comprehensive computational analysis of relevant drying phenomena. In this study, numerical simulations and experimental investigations of three-dimensional simultaneous heat and mass transfer in a photovoltaic (PV) - powered drying system operating under forced convection were conducted under no load conditions. The equations governing continuity, momentum, energy, and species were solved using ANSYS Fluent’s Finite Volume Method (FVM), a computational fluid dynamics tool. The highest simulated temperature and velocity in the drying chamber, 393 K and 1.55 m/s, respectively, closely matched the experimental values of 386 K and 1.40 m/s. It is recommended that the developed drying system serve as a practical alternative to traditional open sun drying, as the numerical results were within an acceptable range
Optimization of malachite green adsorption from aqueous solution onto Anchote peel based activated carbon using Box Behnken design
No full textMalachite green–contaminated wastewater discharged without proper treatment poses serious risks to human health and the environment. Therefore, this study evaluated the adsorptive removal of malachite green from aqueous solution using activated carbon derived from anchote peel. The adsorbent was prepared via chemical activation with phosphoric acid followed by thermal activation in the absence of oxidizing agents. Adsorption optimization was performed using the Box–Behnken design of response surface methodology with four variables: pH (3, 6, 9), initial dye concentration (50, 100, 150 mg/L), adsorbent dosage (0.5, 1.0, 1.5 g/100 mL), and contact time (30, 60, 90 min), resulting in 30 experimental runs. The maximum dye removal efficiency of 99.07% was achieved at pH 9, 50 mg/L initial concentration, 1.5 g/100 mL dosage, and 90 min contact time. ANOVA confirmed strong agreement between adjusted and predicted values (R² = 0.9935 and 0.9917) based on the quadratic regression model. These findings demonstrate that anchote peel–based activated carbon is an efficient adsorbent for malachite green removal, and its optimization using the Box–Behnken design provides a promising approach for large-scale treatment of dye-laden industrial wastewate
The Linkage between Personality Traits and Type, Frequency and Motivation of Mobile Games in the Web 3.0 Era
No full textVarious gamers’ psychology has become a hot topic nowadays. Since the video game is changing in the Web 3.0 era, and the popularity of video games is increasing annually, becoming the dominant platform of the entertainment industry. It is important to analyse the reason why people like to play video games, since it can bring benefits to relevant organisations, such as game organisations and prevent game addiction problems. But there are not enough analyses relating to people’s motivation and frequency of playing video games. Regarding the Big Five theory, Maslow’s needs theory and U&G theory, this study analyses the linkage between video gamers’ motivation and behaviours. The main findings of this paper indicate the relationship and connection between gamers’ personality, playing behaviour, motivation to play video games, and game theme preference. In conclusion, this research developed a complicated theoretical framework based on the existing theories, highlighting a high relevance between gamers’ personality and their gaming behaviours. Moreover, it provided practical implications for both individuals who play video games and platforms, aiming to create a sustainable online environment
From Aesthetics to Traffic: The turn of photographers under algorithm
No full textIn the digital age, algorithms and platform logic increasingly shape artistic creation and aesthetic outcomes. This paper explores how algorithmic aesthetics lead to homogenization, how platform logic restricts or transforms artistic autonomy, and what social consequences arise from these shifts. Based on a literature review of recent scholarly works, it analyzes three key themes–algorithmic aesthetics, artistic autonomy, and cultural impact?followed by a discussion and conclusion. The study finds that while algorithms expand artistic exposure and democratization, they also create conformity pressures and embed cultural production within new forms of commodification and stratification. Future research should emphasize artist-centered and policy-oriented approaches
Psychological skills training as a strategy to improve mental health and reduce perceived stress in university athletes
No full textThis study examined the effectiveness of a one-month Psychological Skills Training (PST) program in improving mental health and reducing perceived stress among university athletes. Twenty-one student-athletes (15 males and 6 females) from six faculties participated in eight structured PST sessions covering goal setting, self-talk, mental imagery, energization, and relaxation techniques. The Perceived Stress Scale (PSS-10) was administered before and after the intervention. Results showed a significant reduction in stress levels, with mean scores decreasing from 24.14 (SD = 6.58) to 16.81 (SD = 3.88), t(20) = 5.94, p < 0.001, indicating a large effect size (d = 1.30). The proportion of athletes classified as high stress dropped from 38% to 4.8%, while low-stress levels increased from 5% to 19%. These findings suggest that even a short-term PST program can effectively enhance athletes’ emotional regulation, self-awareness, and psychological stability. Integrating PST into coaching and sport-education curricula is recommended to support athletes’ mental well-being and sustainable performance in higher education sport environments
Floristics and vegetation structure in areas of caatinga savannas in the Coreaú basin, Ceará, Brazil
No full textAlthough the Brazilian Cerrado occupies a large continuous area in central Brazil, it also occurs in disjunct patches across other regions. In the semi-arid zone, some of these patches have shown greater floristic and ecological affinity with the Caatinga and are thus referred to as caatinga savannas. These areas exhibit diverse vegetation types, with varying densities depending on the degree of arboreal cover. identified the flora and characterized the natural vegetation of four sites located in two municipalities in the state of Ceará: Granja (Fazenda Quilómetro 35, Papagaios, and Vereda dos Tomás) and Martinópole (Bom Princípio), within the Coreaú River Basin. The classical sigmatist method of Braun-Blanquet was applied for vegetation survey, followed by a classificatory analysis (Modified Twinspan) to distinguish plant communities. Botanical expeditions and phytosociological inventories were conducted unsystematically in 2018, 2023, and 2024. A total of 73 phytosociological inventories were carried out, allowing the identification and proposal of 10 plant communities, classified as arboreal, arboreal-shrub, shrub, and herbaceous. The synphytosociological analysis led to the proposal of two edaphophilous vegetation series