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31,456 Article Results

Improve the thermal performance of the combined water-paraffin hot storage tank in the absorption cooling cycle

10.11591/ijape.v14.i4.pp1011-1022
Maki Haj Zaidan , Thamir Khalil Ibrahim , Hussam S. Dheyab
This research investigates the thermal performance of storage materials in a hot tank designed to extend the operation time of a 1.5-ton water ammonia absorption cooling system. Thermal energy is supplied by concentric parabolic solar collectors, which heat the absorption cycle generator during periods of sufficient solar radiation. When the water temperature exceeds the system’s operating threshold, the additional heat accumulates in the hot tank. It is later used to drive the generator during periods of low solar availability, such as in the afternoon or after sunset. The system is designed to provide air conditioning for a room; its load was calculated hourly. The suitable size of the storage tank and the corresponding collector area were determined based on simulations of the absorption system to achieve an optimal coefficient of performance (COP). The collector area was increased after the addition of paraffin phase change material (PCM) to enhance system performance, and a temperature control strategy was implemented to prevent the water in the hot storage tank from reaching the boiling point. This was achieved by incorporating a specific percentage of paraffin, a PCM, with a melting point of 85 °C. The size of the hot storage tank containing both water and a specified proportion of paraffin, in addition to the solar collector area, was optimized to maximize the tank temperature. These parameters were entered into the energy balance model as input data to ensure the effective operation of the absorption system under optimal conditions. A comprehensive system simulation was conducted by deriving and simplifying the heat balance equations for the hybrid hot storage tank, the solar collector, and the absorption system. The simulation aimed to identify the optimal wax ratio of 5% to 20% to maximize system performance. The optimal paraffin ratio was found to be 10% of the tank volume, which enabled an additional 4 hours of operation and extended the system’s uptime to its maximum potential.
Volume: 14
Issue: 4
Page: 1011-1022
Publish at: 2025-12-01

On big data predictive analytics-trends, perspectives, and challenges

10.11591/ijece.v15i6.pp5978-5985
Yassine Benlachmi , Abdelaziz El Yazidi , Abdallah Rhattoy , Moulay Lahcen Hasnaoui
The world is experiencing explosive growth in numerous sectors such as healthcare, engineering, scientific studies, business, social networking. This growth is causing an immense surge in data generation too. And with the emergence of technologies like internet of things (IoT), Mobile, and cloud computing, the volume of data being produced is skyrocketing. However, making sense of this colossal amount of data is a daunting challenge. Enter big data computing, a new paradigm that blends large datasets with advanced analytical techniques. Big data is characterized by the three V's: Volume, velocity, and variety, and refers to massive datasets. By processing this data, we can uncover new opportunities and gain valuable insights into market trends. Traditional techniques are simply not equipped to handle the scale of Big Data. The purpose of this article is to gather reviews of various predictive analytics applications related to big data and the advantages of using big data analytics across various decision-making domains.
Volume: 15
Issue: 6
Page: 5978-5985
Publish at: 2025-12-01

An ensemble machine learning based model for prediction and diagnosis of diabetes mellitus

10.11591/ijece.v15i6.pp5347-5359
Moataz Mohamed El Sherbiny , Asmaa Hamdy Rabie , Mohamed Gamal Abdel Fattah , Ali Elsherbiny Taki Eldin , Hossam El-Din Mostafa
Diabetes mellitus (DM) is a chronic metabolic disorder that poses significant health risks and global economic burdens. Early prediction and accurate diagnosis are crucial for effective management and treatment. This study presents an ensemble machine learning-based model designed to predict and diagnose Diabetes Mellitus using clinical and demographic data. The proposed approach integrates multiple machine learning algorithms, including random forest (RF), extreme gradient boosting (XGB), and logistic regression (LR), to leverage their individual strengths and enhance the entire performance. The ensemble model was trained and validated on multiple comprehensive datasets. Performance measures demonstrate the robustness of proposed model and its reliability in distinguishing diabetic cases from non-diabetic cases after applying several preprocessing steps. This work ensures the capability of machine learning in advancing healthcare by providing efficient, data-driven tools for diabetes management, aiding clinicians in early diagnosis, and contributing to personalized treatment strategies. Comparative analysis against standalone models highlights the superior predictive capabilities of the ensemble approach. Results had shown that ensemble model achieved an accuracy of 96.88% and precision of 89.85% outperforming individual classifiers.
Volume: 15
Issue: 6
Page: 5347-5359
Publish at: 2025-12-01

Culture-based teaching practices of teachers in a Philippine-Chinese school: narratives and insights

10.11591/ijere.v14i6.33611
Remedios C. Bacus , Rivika C. Alda , Helen B. Boholano
Philippine-Chinese schools have been in existence for several decades. This study explores the influence of Chinese culture on Filipino teachers’ pedagogical and content delivery, language and social interaction, and their practices and constructions while teaching in a Chinese school. Through a descriptive–qualitative approach to explore the experiences, 12 non-Chinese teachers were purposively chosen to participate in the study. Guided by the validated interview guide and the qualitative data analysis steps by Braun and Clarke, six themes emerged: bilingual pedagogy, cultural values integration, language immersion, technology in education, thriving through diversity, support and collegiality. The study revealed the enriching interaction between Chinese cultural influences and Filipino teaching practices, suggesting the need for ongoing professional development that enhances cultural competence, innovative pedagogical strategies, and supportive teaching communities.
Volume: 14
Issue: 6
Page: 5080-5093
Publish at: 2025-12-01

Cross-lagged panel insights into health, social, and economic in life satisfaction

10.11591/ijphs.v14i4.26696
Pachitjanut Siripanich , Titirut Philmolsri , Wasin Kaewchankha
This study examines life satisfaction in older Thai adults as shaped by dynamic interactions among health, social, and economic factors. Most prior research-both globally and in Thailand-has relied on cross-sectional designs, limiting understanding of cross-lagged relationships. Closing this gap led to the following research objectives: i) assess the stability of health, social, and economic factors and life satisfaction, ii) examine reciprocal and temporal relationships among these domains, and iii) explore age-related variations. Data were drawn from Wave III and IV of the Health, Aging, and Retirement in Thailand (HART) survey (n = 561) and analyzed using cross-lagged structural equation modeling. The findings demonstrated stability in social activity, physical health, mental health, and life satisfaction in both waves. Cross-lagged effects revealed reciprocal and temporal relationships, where mental health influenced future physical health, and life satisfaction impacted subsequent mental well-being. Age-specific differences emerged, with stronger effects in middle-aged adults, where life satisfaction had a greater effect on future mental health, and mental health more strongly influenced physical health over time. Among those aged 60 and older, physical health exhibited the highest stability, while life satisfaction and mental health effects weakened, suggesting age-related shifts in well-being.
Volume: 14
Issue: 4
Page: 1686-1699
Publish at: 2025-12-01

Beyond awareness: an assessment of reading program implementation in Butuan City, Philippines

10.11591/ijere.v14i6.33206
Jereco F. Cultura , Ariel U. Cubillas , Trixie E. Cubillas
This study assessed the levels of awareness and implementation of every child a reader program (ECARP) in public elementary schools within South Butuan District-I, Butuan City Division, Philippines. Additionally, it sought to determine the relationship between the awareness levels of teachers and school heads and the program’s implementation. A mixed-method design was used, with survey questionnaires administered to 105 respondents, representing 95% of the district’s teachers and school administrators. Analysis of the collected data revealed that participants exhibited high awareness regarding the components of implementation, monitoring, evaluation, and reading assessment. The implementation of ECARP was rated as very satisfactory. Furthermore, a significant relationship was identified between the levels of awareness and implementation, underscoring the importance of guideline awareness for effective program execution. The study concludes that heightened awareness of ECARP guidelines is crucial for achieving a well-implemented reading program. These findings offer a valuable contribution to the field of education by providing a localized analysis of the reading program, highlighting both its challenges and successes. The study introduces data that can inform future policy adjustments, while offering new insights for enhancing existing reading programs and guiding the development of localized intervention plans.
Volume: 14
Issue: 6
Page: 5140-5150
Publish at: 2025-12-01

Enhancing semantic segmentation with a boundary-sensitive loss function: a novel approach

10.11591/ijece.v15i6.pp5327-5335
Ganesh R. Padalkar , Madhuri B. Khambete
Semantic segmentation is crucial step in autonomous driving, medical imaging, and scene understanding. Traditional approaches leveraging manually extracted pixel properties and probabilistic models, have achieved reasonable performance but suffer from limited generalization and the need for expert-driven feature selection. The rise of deep learning architectures has significantly improved segmentation accuracy by enabling automatic feature extraction and capturing intricate object details. However, these methods still face challenges, including the need for large datasets, extensive hyperparameter tuning, and careful loss function selection. This paper proposes a novel boundary-sensitive loss function, which combines region loss and boundary loss, to enhance both region consistency and edge delineation in segmentation tasks. Implemented within a modified SegNet framework, the approach proposed in the paper is evaluated with the semantic boundary dataset (SBD) dataset using standard segmentation metrics. Experimental results indicate improved segmentation accuracy, substantiating to proposed method.
Volume: 15
Issue: 6
Page: 5327-5335
Publish at: 2025-12-01

Design and experimental validation of a microstrip Vivaldi antenna-based system for breast tumor detection

10.11591/ijece.v15i6.pp5497-5505
Samiya Qanoune , Hassan Ammor , Zakaria Er-Reguig , Zouhair Guennoun
Breast cancer remains one of the leading causes of death among women worldwide, highlighting the critical need for accurate, non-invasive, and cost-effective diagnostic solutions. In light of this, microwave imaging has surfaced as a promising alternative to conventional diagnostic methods. This approach leverages its capability to differentiate between healthy and cancerous tissues by examining their dielectric properties. This study presents the design, implementation, and experimental assessment of a Vivaldi antenna-based system aimed at breast cancer detection. The antenna is designed to operate within the ultra-wideband frequency range, which facilitates high-resolution imaging and effective deep tissue penetration. Data collected from tissue-mimicking phantoms reveals the system’s proficiency in identifying anomalies, showcasing a significant contrast between malignant and normal tissue regions. We analyze various performance metrics, including signal reflection, penetration depth, and imaging resolution to substantiate the system's efficacy. The results underline the significant potential of Vivaldi antennas in improving early- stage breast cancer detection, thus contributing to advancements in microwave imaging technology.
Volume: 15
Issue: 6
Page: 5497-5505
Publish at: 2025-12-01

Analysis and implementation of computation offloading in fog architecture

10.11591/ijra.v14i3.pp479-492
Prince Gupta , Rajeev Sharma , Sachi Gupta , Adesh Kumar
The fast expansion of connected devices has led to an unparalleled increase in data across sectors like industrial automation, social media, environmental monitoring, and life sciences. The processing of this data presents difficulties owing to its magnitude, temporal urgency, and security stipulations. Computation offloading has arisen as a viable alternative, allowing resource-constrained devices to assign demanding work to more robust platforms, thus improving responsiveness and efficiency. This paper examines decision-making strategies for computing offloading by assessing various algorithms, including a deep neural network with deep reinforcement learning (DNN-DRL), coordinate descent (baseline), AdaBoost, and K-nearest neighbor (KNN). The performance evaluation centers on three primary metrics: system accuracy, training duration, and latency. The computation offloading mitigates these issues by transferring intricate workloads from resource-limited devices to more proficient platforms, thus enhancing efficiency and responsiveness. The evaluation examines accuracy, training duration, and latency as key parameters. The results indicate that KNN attains maximum accuracy and minimal latency, AdaBoost provides a robust balance despite increased training costs, and the baseline underperforms in both efficiency and responsiveness. These findings underscore the trade-offs between computational expense, precision, and real-time application, providing insights for forthcoming IoT and edge-computing systems.
Volume: 14
Issue: 3
Page: 479-492
Publish at: 2025-12-01

Intelligent control for distributed smart grid: comprehensive system integrating wave, fuel cell, and photovoltaic power generation

10.11591/ijece.v15i6.pp5119-5129
Manohar B S , Basavaraja Banakara
The intermittent supply from renewable energy sources reckons integration of different renewable sources that can provide robust and uninterrupted energy supply to the grid. This paper applies an intelligent control method to such hybrid power generation involving a wave generator, fuel cell, and solar power generator integrated into the distribution power grid. A common DC link that supplies the voltage source converter (VSC) is powered by the output from the hybridized wave, fuel cell and photovoltaic (PV) output. Wave generator uses the rectifier DC-DC converter, PV uses a maximum power point tracking (MPPT)-controlled DC-DC converter and fuel cell uses a DC-DC converter. All DC sources converge at the DC link, connecting to an inverter featuring another voltage source controller for controlled AC voltage. In instances of power unavailability from renewable resources, the fuel cell seamlessly provides power. The inverter controls the integration of power from these sources to the grid and maintains stable DC link voltage due to the dynamic nature of the DQ controller. MATLAB-based simulation is developed for the proposed controller and a comparison between both proportional integral and adaptive neuro-fuzzy inference system (ANFIS) controller in the DC link voltage regulation loop is observed. An ANFIS controller is employed as an alternative to the proportional integral (PI) controller and found that the ANFIS controller outperformed the PI controller in voltage regulation at the DC link.
Volume: 15
Issue: 6
Page: 5119-5129
Publish at: 2025-12-01

Intuitive effectiveness degree of research methodologies for spectrum sensing in cognitive radio network

10.11591/ijece.v15i6.pp5699-5707
Pushpa Yellappa , Dr.Keshavamurthy Keshavamurthy
The phenomenon of spectrum sensing plays an essential role in cognitive radio network (CRN) that is performed in real-time for better adaptability to dynamic usage of spectrum. However, efficient decision-making is often noted to be affected by dynamic environmental condition, interference, and noise leading to declination in performance. In recent times, there are proposals for various methodologies addressing such issues targeting towards improving spectrum sensing along with machine learning and energy detection approach, which is gaining its pace for technical research implementation. Irrespective of this advancement, ambiguity shrouds regarding the contrast effectiveness associated with these methods and their appropriateness in different situation. Hence, this manuscript presents a comprehensive and yet crisp review work to offer concise assessment of latest methodologies towards spectrum sensing used in CRN ecosystem. The paper has an inclusion of existing techniques, presents their potentials and shortcomings, exhibited evolving trends of research, extracts key gaps and challenges. The prime intention of this review work is towards guiding the future researchers and scholars by facilitating deeper insight towards the recent state of technologies in spectrum sensing.
Volume: 15
Issue: 6
Page: 5699-5707
Publish at: 2025-12-01

Socio-demographics impact of healthy lifestyle in parents with preschoolers: a pilot study

10.11591/ijphs.v14i4.26165
Eirini Chitou , Vasiliki Karavida , Eleni Tympa , Evridiki Zachopoulou
Parents’ ability to follow a healthier lifestyle is influenced by their socio-demographic characteristics. This study seeks to assess the lifestyles of preschoolers’ parents and discern potential correlations with their demographic attributes. Using a quantitative approach, a pilot study was conducted among 51 parents who actively participated in a survey. To study the extent of parents’ adoption of a healthy lifestyle, a 25-question Likert scale questionnaire was employed. Findings revealed a notable prevalence of healthy habit adoption, including a wholesome diet. Furthermore, the results noted a commendable level of parents’ knowledge of matters related to healthy lifestyles. Of particular interest was the significant impact of maternal fixed work schedules on the implementation of healthy eating habits, which surpassed the influence of other types of work schedules. Additionally, a direct correlation was observed between information derived from authoritative sources about healthy lifestyles and the educational attainment of parents. More specifically, parents with higher educational attainment tend to be more conscious of healthy living and to actively incorporate a healthy lifestyle into their daily routines. In light of these findings, there is a clear indication that further research into the dynamics of parents’ adoption of healthy lifestyles is required.
Volume: 14
Issue: 4
Page: 1837-1848
Publish at: 2025-12-01

Evaluating mathematics teachers’ usage of online tools to enhance learning performance of high school students

10.11591/ijere.v14i6.33960
Olajumoke Olayemi Salami , Erica Dorethea Spangenberg
The application of digital technologies to teach mathematics is increasing and how educators use these tools and their impact on the performance of students needs to be sufficiently researched. In this study, we explore middle school mathematics teachers’ utilization of Algebra Nation (AN), an online instructional resource, to supplement instruction and improve the performance of their mathematics students, particularly in algebra. A survey was conducted involving 596 teachers and a quasi-experimental trial. We examined the relationship between AN use and Algebra I end-of-course (EOC) exam performance. The findings showed that engagement in AN observed through student login, video watches, and professional teacher development is associated with improved student’s success rates in mathematics. This study also revealed that challenges such as digital disparity, data privacy issues, and professional teacher development were identified to impact the effective implementation of digital technologies in teaching mathematics. This study recommends that there should be systematic integration of web resources, combined with targeted teacher training to significantly enhance mathematics instruction. These conclusions inform future technology adoption and policymaking, with emphasis on equal access and systemic teacher support.
Volume: 14
Issue: 6
Page: 4443-4455
Publish at: 2025-12-01

Hybrid artificial intelligence approach to counterfeit currency detection

10.11591/ijece.v15i6.pp5804-5814
Monther Tarawneh
The use of physical money continues, posing ongoing challenges in the form of counterfeit money. This problem not only poses a threat to economic stability but also undermines confidence in the financial systems in use. Traditional methods such as manual inspections and testing of security features have become ineffective in detecting advanced counterfeiting techniques on an ongoing basis. This study proposes a hybrid model that harnesses the power of artificial intelligence, combining convolutional neural networks (CNNs), long short-term memory networks (LSTMs), and support vector machines (SVMs) for counterfeit detection. The proposed model leverages the diverse strengths of a number of artificial intelligence techniques, combining the ability to detect counterfeiting, analyse visual aspects, and sequences of banknotes. The proposed model was tested using real Jordanian currency sets of different denominations and datasets generated using generative adversarial networks (GANs). The results showed that the model was able to detect counterfeiting with high accuracy of 98.6%. and minimal errors compared to other methods. This outstanding performance demonstrates the benefits of integrating artificial intelligence (AI) technologies and that there is room for development and solutions that can keep up with advanced counterfeiting strategies. The study demonstrates the importance of integrating AI in maintaining the integrity of physical currency transactions.
Volume: 15
Issue: 6
Page: 5804-5814
Publish at: 2025-12-01

A systematic review of heuristic and meta-heuristic methods for dynamic task scheduling in fog computing environments

10.11591/ijece.v15i6.pp5986-6000
Hamed Talhouni , Noraida Haji Ali , Farizah Yunus , Saleh Atiewi , Yazrina Yahya
The distributed fog node network and variable workloads make task distribution difficult in fog computing. Optimizing computing resources for dynamic workloads with heuristic and metaheuristic algorithms has shown potential. To address changing workloads, these algorithms enable real-time decision-making. This systematic review examines heuristic, meta-heuristic, and real-time dynamic job scheduling strategies in fog computing. Static methods like heuristic and meta-heuristic algorithms can help modify dynamic task scheduling in fog computing situations. This paper covers a current study area that stresses real-time approaches, meta-heuristics, and fog computing environments' dynamic nature. It also helps build reliable and scalable fog computing systems by spotting dynamic task scheduling trends, patterns, and issues. This study summarizes and analyzes the latest fog computing research on task-scheduling algorithms and their pros and cons to adequately address their issues. Fog computing task scheduling strategies are detailed and classified using a technical taxonomy. This work promises to improve system performance, resource utilization, and fog computing settings. The work also identifies fog computing job scheduling innovations and improvements. It reveals the strengths and weaknesses of present techniques, paving the way for fog computing research to address unresolved difficulties and anticipate future challenges.
Volume: 15
Issue: 6
Page: 5986-6000
Publish at: 2025-12-01
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