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30,938 Article Results

An enhancement of stock price forecasting based on hybrid BiLSTM-Transformer model

10.11591/ijece.v16i3.pp1298-1306
Pham Hoang Vuong , Lam Hung Phu , Le Nhat Duy , Pham The Bao , Tan Dat Trinh
Stock price forecasting presents a challenging problem due to factors like nonlinearity, seasonality, and economic volatility in financial data. Deep learning approaches can handle nonlinearity and complexity of financial data, but they often face limitations in capturing both local and global dependencies. This study introduces a hybrid Transformer–bidirectional long short-term memory (BiLSTM) model to improve stock price forecasting. Our method combines the strength of BiLSTM with the global context understanding of the Transformer by embedding a 1D convolutional layer. The model can efficiently capture short-term and long-term dependencies in stock data. Experimental results on various datasets show that our hybrid model outperforms other well-known models.
Volume: 16
Issue: 3
Page: 1298-1306
Publish at: 2026-06-01

Cognitive and metacognitive learning strategies as correlates of university students’ mathematics proficiency

10.11591/ijere.v15i3.36934
Polemer M. Cuarto , Enya Marie D. Apostol
Mathematics remains one of the most difficult disciplines in the school curriculum. As such, strategies to address these difficulties are being implemented by educators over the years. This study aimed to determine the influence of the cognitive and metacognitive learning strategies on the mathematics proficiency of university freshmen. Specifically, it sought to assess how students’ use of various cognitive and metacognitive strategies relates to their performance in mathematics. A descriptive-correlational research design was employed to describe the prevailing levels of these learning strategies and examine their association with mathematics proficiency. Data were gathered from 80 randomly selected freshmen students through a validated researcher-made questionnaire and record analysis of their mathematics grades. Results revealed significant positive correlations between control, elaboration, rehearsal, planning, monitoring, and evaluation strategies with mathematics proficiency. The study recommends providing additional mathematics support to struggling students such as remedial and tutorial classes and integrating cognitive and metacognitive learning strategies into the mathematics syllabi. These findings imply that strengthening students’ cognitive and metacognitive awareness can significantly improve their ability to learn and perform in mathematics. Furthermore, integrating these strategies into instructional design may help develop more independent, reflective, and effective learners, leading to higher mathematics achievement.
Volume: 15
Issue: 3
Page: 2338-2347
Publish at: 2026-06-01

Evaluating socioemotional skill interventions for preschool children with autism spectrum disorder: a systematic review

10.11591/ijere.v15i3.38875
Richard Rickie Akat , Suziyani Mohamed , Nurul Khairani Ismail
This study aims to systematically review and synthesize recent empirical evidence on socioemotional skill interventions for preschool children with autism spectrum disorder (ASD) from an educational evaluation perspective. Guided by the preferred reporting items for systematic reviews and meta-analyses (PRISMA) framework, a systematic search of Scopus and Web of Science (WoS) identified 15 peer-reviewed studies published between 2019 and 2025. The included studies were thematically analyzed and appraised using the mixed methods appraisal tool (MMAT). The findings revealed three dominant intervention themes: i) relationship-based and developmental interventions; ii) structured and skill-focused interventions; and iii) creative, expressive, and technology-supported approaches, demonstrating overall positive effects on socioemotional outcomes. However, the strength of evidence remains moderate due to methodological heterogeneity, small sample sizes, and limited longitudinal designs. These findings highlight the importance of developmentally appropriate and flexible intervention designs in inclusive early childhood education. The review offers practical implications for educators, curriculum developers, and policymakers. Specifically, it emphasizes the need for evidence-based socioemotional programs to strengthen inclusive preschool practices for children with ASD.
Volume: 15
Issue: 3
Page: 2021-2032
Publish at: 2026-06-01

Illuminative evaluation of mathematics curriculum implementation in improving students’ numeracy achievement

10.11591/ijere.v15i3.39078
Jose Bonatua Hasibuan , Deni Darmawan , Suhendra Suhendra , Deni Kurniawan
Persistent evidence from national and international assessments indicates that students’ numeracy achievement remains low, suggesting a gap between intended curriculum goals and classroom implementation. This study conducts an illuminative evaluation of secondary mathematics curriculum implementation as an instructional system, examining how curriculum enactment relates to students’ numeracy achievement in the Indonesian secondary context. Employing a sequential explanatory mixed-methods design, the quantitative phase assessed the numeracy performance of 288 secondary students across content domains, cognitive levels, and item formats, while the qualitative phase investigated instructional practices, assessment culture, and the school learning milieu to explain the observed achievement patterns. The findings indicate uneven numeracy achievement, with performance concentrated at procedural levels and declining from knowing to applying and reasoning. Students perform relatively better on objective formats but demonstrate a limited ability to justify solutions in open-ended tasks. Qualitative evidence further indicates a misalignment between reasoning-oriented curriculum intentions and efficiency-driven classroom practices that emphasize procedural accuracy. These findings provide evidence-based insights into aligning curriculum design, classroom instruction, and assessment practices to strengthen reasoning-oriented numeracy learning.
Volume: 15
Issue: 3
Page: 2608-2617
Publish at: 2026-06-01

Educational support for disadvantaged students in Vietnamese higher education

10.11591/ijere.v15i3.38585
Quoc Cuong Nguyen Dinh , Van Vu Hong
This study aims to examine how social inequality is shaped; to determine the scope and evaluate the effectiveness of educational support programs for disadvantaged students in Vietnamese higher education. The study employs a mixed-methods design, combining document analysis, a questionnaire survey with 227 participants from 10 universities, and semi-structured interviews with 16 administrators, faculty members, and students. Quantitative data were processed using descriptive statistics, while qualitative data were analyzed thematically to clarify educational institutions’ practices and implementation gaps. The results show that support activities remain primarily focused on scholarships and financial aid, while academic support, psychological counseling, and capacity-building services are fragmented and not fully integrated into the management systems of higher education institutions. The study also indicates that inequality exists not only through economic disadvantage but also through deficiencies in cultural capital, learning skills, social support, and access to educational resources. From a theoretical perspective, the findings further clarify the theory of social reproduction and equity-oriented educational governance by showing that inequality is also reproduced through fragmented support governance. The conclusion is that support for disadvantaged students needs to be managed as an integrated, multidimensional, and systemic equity mechanism, rather than as isolated welfare interventions.
Volume: 15
Issue: 3
Page: 2082-2095
Publish at: 2026-06-01

Assessing integrated social-emotional and cognitive competencies in pre-service teachers: scale development

10.11591/ijere.v15i3.38305
Joy D. Talens
Developing integrated social-emotional and cognitive (ISEC) competencies is essential for pre-service teachers (PST), yet these competencies are often underemphasized in teacher education programs. This study aimed to develop and provide preliminary evidence for a reliable, structurally sound instrument to measure ISEC competencies among PST. Using a design and development research approach, PST-ISEC learning competency scale was developed and examined for internal structure and reliability. An initial pool of 74 items, refined through literature review, and expert validation, was administered to purposively selected PST from higher education institutions in one Philippine region (n=370 for exploratory factor analysis (EFA); n=405 for confirmatory factor analysis (CFA)). EFA with Varimax rotation reduced the scale to 22 items across five dimensions: collaborative spirit (CS), hopeful mindset (HM), mindful confidence (MC), emotional resilience (ER), and responsible decision-making and accountability (RD). CFA confirmed five-factor structure with acceptable fit, and internal consistency indices indicated adequate reliability. Convergent and discriminant validity analyses supported construct distinctiveness. The PST-ISEC scale provides a theoretically grounded tool for formative assessment, program evaluation, and targeted interventions. Future studies should examine criterion-related and predictive validity, measurement invariance, and cross-context applicability to strengthen its utility.
Volume: 15
Issue: 3
Page: 2588-2596
Publish at: 2026-06-01

Validating the factor structure of primary school teaching quality using the PDCA cycle

10.11591/ijere.v15i3.37326
Nhat Thong Du , Van Dat Tran
Improving teaching quality is a critical goal of educational reform, particularly in the context of Vietnam’s 2018 General Education Program (GEP). However, there is still a lack of valid instruments for assessing instructional practices based on continuous improvement models. This research fills this void by creating and validating the primary school teaching quality scale (PSTQS), based on the Plan-Do-Check-Act (PDCA) cycle, a well-known quality management framework. A cross-sectional survey design was used to collect data from 528 primary school teachers in Ho Chi Minh City. The 20-item PSTQS was constructed to align with the PDCA model and the competencies outlined in the 2018 GEP. The sample was randomly split into two groups for a two-phase validation: exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). EFA found a four-factor structure that matched the PDCA cycle and accounted for 45.3% of the variance. CFA confirmed the model’s fit (comparative fit index (CFI)=0.95, Tucker-Lewis index (TLI)=0.94, root mean square error of approximation (RMSEA)=0.04, standardized root mean square residual (SRMR)=0.05). The scale demonstrated strong internal consistency (composite reliability (CR)>0.79), with robust convergent and discriminant validity. The PSTQS is a reliable, valid tool for evaluating teaching practices through a quality improvement lens. While results are specific to Ho Chi Minh City, the scale offers a foundation for broader application and supports continuous professional development and policy implementation.
Volume: 15
Issue: 3
Page: 1971-1985
Publish at: 2026-06-01

Evaluation of oral tradition-based reading instruction on secondary students reading competence

10.11591/ijere.v15i3.38722
Teófilo Félix Valentín Melgarejo , Clodoaldo Ramos Pando , Pablo Lolo Valentín Melgarejo , Fidel Alberto García Yale , William Cesar Santos Hinostroza , Rober Wesmel Sánchez Trinidad , Ulises Espinoza Apolinario , Rosa Luz Gómez Segura , Tito Armando Rivera Espinoza , José Rovino Alvarez López , Julio César Carhuaricra Meza , Flaviano Armando Zenteno Ruiz
Reading competence is a developmental and multidimensional construct that is often evaluated through mean score comparisons that may obscure structural learning changes. This study examined the effectiveness of a culturally grounded oral tradition–based intervention on primary students’ reading competence in Pasco, Peru. A quantitative quasi-experimental pretest–posttest design with a control group was implemented using intact classrooms (experimental n=19; control n=14; N=33). The eight-week intervention integrated local myths, legends, and folktales into guided reading, inferential questioning, and evaluative discussion activities. Reading competence was assessed using narrative texts scored with an analytic rubric classifying students into four ordered achievement levels (initial, in process, expected, and outstanding). Data were analyzed using ordinal mobility analysis, distributional dominance testing, and dynamic-systems indicators. Results showed complete structural stability in the control group, whereas 89.5% of students in the experimental group demonstrated upward mobility and all reached expected or outstanding levels at posttest. These findings indicate that culturally responsive oral-tradition instruction can produce substantial structural improvements in reading competence. This study contributes to educational evaluation by demonstrating how ordinal mobility and dynamic-systems indicators reveal instructional effects that may remain hidden in traditional mean-based analyses.
Volume: 15
Issue: 3
Page: 2632-2647
Publish at: 2026-06-01

Development of a recommendation system for selecting a formula in cataract surgery

10.12928/telkomnika.v24i3.27580
Arseniy; Volgograd State Medical University Lomakin , Anastasiya; Volgograd State Technical University Donskaya , Alexander; Volgograd State Medical University Zubkov
Accurate intraocular lens (IOL) power calculation remains a critical factor for achieving optimal refractive outcomes in cataract surgery. This study analyzes existing methods and software solutions for selecting formulas used to calculate IOL power. To solve this problem, a support medical decision-making recommendation system (SMDRS) was developed to analyze patient biometric data and predict the most suitable calculation formula. Among the evaluated machine learning approaches, the random forest (RF) algorithm demonstrated the highest stability and classification accuracy, leading to its selection as the core predictive engine. The system was validated using retrospective clinical data and evaluated in a functioning ophthalmology clinic. Performance evaluation demonstrated that the system increased the success rate of surgical outcomes in complex cases from 73.5% to 90.5%, thereby confirming its impact on improving the efficiency of optical calculations in clinical practice. By minimizing human error and standardizing decision-making, the proposed solution offers a robust tool for ensuring consistently superior surgical results.
Volume: 24
Issue: 3
Page: 904-914
Publish at: 2026-06-01

Transparent insights: explainable AI with machine learning classifiers for early stage of depression classification

10.12928/telkomnika.v24i3.27651
S. M. Rakibul; University of Frontier Technology Islam , Shaykh; University of Frontier Technology Yunus , Rashiduzzaman; Daffodil International University Shakil , Fatema Tuz; University of Frontier Technology Johora , Aditya; University of Frontier Technology Rajbongshi , Sujon Chandra; University of Frontier Technology Sutradhar
Depression is a widespread mental health condition characterized by enduring feelings of persistent sadness, loss of interest, and impaired daily functioning. Untreated depression can result in significant implications, such as academic failure, social isolation, and even suicide. This study presents a machine learning (ML)–based framework for classifying depression severity among university students using the Zahir depression scale dataset, comprising 478 responses categorized into mild, moderate, severe, and profound depression. In order to address the issue of class imbalance, we utilized the synthetic minority over sampling technique (SMOTE) on the dataset. In addition, seven different ML algorithms are employed to classify the severity of depression, and each algorithm’s efficiency is determined by four performance evaluation metrics. Among the applied ML classifiers, extra tree classifier outperformed with an average accuracy of 97.85% and 95.75% precision, 95.76% recall, and 95.75% F1-score. To enhance interpretability, the shapley additive explanations (SHAP) method was integrated to identify influential features, providing transparency and insight into the model’s decision process. The proposed framework demonstrates that combining explainable artificial intelligence (XAI) with traditional ML can support healthcare professionals in early depression screening and data driven mental health interventions.
Volume: 24
Issue: 3
Page: 915-925
Publish at: 2026-06-01

Hybrid GA–SA optimization for eMBB-oriented spectrum allocation in 5G device-to-device communication

10.12928/telkomnika.v24i3.27394
Mohd Azrulazwan; Universiti Kebangsaan Malaysia Jusoh @ Mohd Yusoff , Nor; Universiti Kebangsaan Malaysia Fadzilah Abdullah , Asma’ Abu; Universiti Kebangsaan Malaysia Samah
The explosive growth of enhanced mobile broadband (eMBB) services in fifth generation (5G) networks presents new challenges in maintaining quality of service (QoS), particularly under dense deployments with device-to-device (D2D) communication. Interference caused by spectrum reuse among D2D pairs and cellular users can significantly degrade signal-to-interference-plus-noise ratio or signal-to-interference-plus-noise ratio (SINR), throughput, and fairness. This paper addresses the underexplored problem of optimizing spectrum allocation in eMBB-specific D2D scenarios by proposing a hybrid metaheuristic framework combining genetic algorithm (GA) and simulated annealing (SA). The proposed hybrid GA–SA algorithm leverages GA’s global exploration and SA’s local exploitation to improve allocation quality while ensuring robustness. Simulation results reveal that the hybrid approach achieves up to 25% improvement in SINR, an 18% increase in aggregate throughput, and a 22% reduction in interference compared to standalone GA and SA algorithms. Furthermore, the framework achieves improved fairness performance while maintaining competitive SINR and throughput under dense eMBB-oriented deployment scenarios. The algorithm demonstrates efficient convergence behavior and scalability to larger user populations, making it suitable for real-time or large-scale deployments. These results affirm the significance of tailored hybrid optimization in interference-aware spectrum management for future 5G networks.
Volume: 24
Issue: 3
Page: 765-778
Publish at: 2026-06-01

Enhancing energy efficiency in wireless mesh networks through time-synchronized sleep scheduling and low-power hardware

10.12928/telkomnika.v24i3.27616
Rifki; Universitas Bhayangkara Jakarta Raya Muhendra , Dede; Universitas Bhayangkara Jakarta Raya Rukmayadi , Solihin; Universitas Bhayangkara Jakarta Raya Solihin
Energy efficiency remains a critical challenge in wireless mesh networks (WMNs), particularly for internet of things (IoT) deployments with battery powered nodes and multihop communication. This paper proposes a time synchronized sleep scheduling framework that integrates a lightweight regression-based time synchronization model with low-power hardware to reduce energy consumption in long range (LoRa)-based WMNs. The proposed mechanism aligns local node clocks with a global reference using slope and offset correction, enabling synchronized active and sleep states across nodes. This coordination significantly reduces idle listening and unnecessary radio-on time. The proposed approach is validated through real world experiments on a multihop LoRa mesh testbed with up to three hops. Results show a substantial improvement in energy efficiency, reducing cumulative energy consumption from 125.31 mWh to 28.18 mWh over 10 hours (77.5% reduction). The sleep-mode current is reduced to 0.01 mA, demonstrating effective duty cycling. Furthermore, the approach maintains stable routing, bounded latency, and high packet delivery ratio (PDR). These findings confirm that accurate time synchronization is a key enabler for energy-efficient and reliable multihop communication, providing a practical solution to extend the operational lifetime of IoT-based WMNs.
Volume: 24
Issue: 3
Page: 966-978
Publish at: 2026-06-01

Talent identification and development of youth fencers: coaches’ perspectives

10.11591/ijere.v15i3.39062
Hayder N. Jawoosh , Lim Hooi Lian , Rahimi Che Aman
Talent identification (TID) in sports has been found to be heavily influenced by the expertise and judgment of the coach. However, the factors that inform this judgment have been found to be complex and understudied, especially in the sport of fencing. Inconsistencies have also been found in the concept and construct of TID in the development programs of young athletes. Therefore, the purpose of this study was to identify the essential criteria that inform TID in young male fencers aged between 12 and 15 years and to describe the criteria in the selection of young athletes to a fencing club. A qualitative research methodology was employed in this study. In this research, six male coaches from professional clubs affiliated with the Iraqi Fencing Federation were interviewed. The results of this study revealed that technical, tactical, and mental factors, especially fencing ability, decision-making capacity, and intrinsic motivational factors, were found to be essential in TID. Physiological, physical, and anthropometric factors were also found to be of little importance in TID. In conclusion, TID in young fencers needs to be informed by a holistic approach that considers different dimensions of development. Further research in this area needs to be conducted to refine the criteria in TID.
Volume: 15
Issue: 3
Page: 2577-2587
Publish at: 2026-06-01

Academic engagement and artificial intelligence platform behaviors in grammar achievement

10.11591/ijere.v15i3.37822
Wang Yadan , Soon Singh Bikar Singh , Connie Shin , Zheng Juncai , Zhang Qianqian
This study is among the first to use archival institutional records to test the incremental validity of artificial intelligence platform behaviors (AI_index) in predicting grammar achievement (GA). Using data from 405 non–English-major freshmen enrolled in a compulsory grammar course at a private Chinese university, we examined whether AI_index predicts end-of-semester grammar exam performance beyond course-embedded behavioral academic engagement (AE_index). AE_index was derived from grade-book quizzes and class interactions, whereas AI_index was constructed from institutional platform logs capturing coursework completion and assigned video viewing. Indices were scaled to a 0–100 range, and GA was measured by a unified final exam. Descriptive statistics, correlations, and hierarchical regression analyses showed that AE_index was a small but significant predictor of exam performance, whereas AI_index was weak and non-significant and added no incremental predictive value beyond AE_index. Together, the two indices explained a modest proportion of variance in GA. These findings suggest that completion-based platform metrics are unlikely to reflect effortful learning unless platform tasks align with summative assessment demands (e.g., translation and proofreading). The findings caution against using completion-based AI metrics as high-stakes indicators without demonstrated task–assessment alignment.
Volume: 15
Issue: 3
Page: 2690-2699
Publish at: 2026-06-01

Lightweight SDN/NFV-based framework for dynamic data-flow and network slice adaptation

10.12928/telkomnika.v24i3.27810
Sumbal; Wigan and Leigh College and University Centre Zahoor , Ali; Calrom Ltd. Mamoon
The increasing demand for responsive and reliable network services in next-generation communication systems has intensified the need for dynamic resource management and quality of service (QoS) assurance. Software-defined networking (SDN) and network function virtualization (NFV) provide programmability and flexibility for modern networks. However, practical platforms that demonstrate real-time adaptive behavior remain limited. This study differs from prior simulation-focused work by demonstrating real-time adaptive slice control in a reproducible container-based SDN/NFV emulation environment. A bottleneck-aware slice controller is developed to classify degradations as network-limited, server-limited, or service failure using joint indicators, and to select rerouting or service migration using stability constraints and a lightweight action-cost model. Experimental results show that throughput is restored to above 90% of nominal capacity. Recovery typically occurs within two to three control iterations. Service continuity is maintained with low control-plane overhead. The work provides a reproducible experimental baseline and a decision mechanism that reduces incorrect reroutes/migrations under ambiguous key performance indicator (KPI) drops.
Volume: 24
Issue: 3
Page: 779-785
Publish at: 2026-06-01
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