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30,938 Article Results

Optimizing papaya yield: the evaluation of deep learning models for automated disease detection

10.11591/ijai.v15.i3.pp2664-2673
Tejas Rana , Chintan Thacker
The current research will create a robust and successful deep learning (DL) system to recognize and classify papaya leaf diseases. The traditional disease detection techniques are both time-consuming and unreliable, and extensively rely on expert knowledge, therefore limiting them in terms of scalability in agricultural practice. To tackle this issue, the convolutional neural network (CNN)-based method is suggested and tested on the BDPapayaLeaf that includes 2,159 images of papaya leaf with four disease categories and healthy papaya leaves, i.e., anthracnose, bacterial spot, leaf curl (reversal), and ring spot. The data was split into training 80%, validation 10%, and testing 10% data. Pictures were downscaled to 224×224 and normalized before training. Six trained CNN structures VGG16, VGG19, InceptionV3, DenseNet121, MobileNetV2, and ResNet50 were examined. The top model in terms of classification accuracy, according to them, was InceptionV3 with 89% in terms of classification accuracy, showing a high level of performance on true positive and false negative. The findings indicate that DL is an effective and precise method of automated detection of papaya leaf disease and is useful in improving precision and reliability in agricultural diagnostics.
Volume: 15
Issue: 3
Page: 2664-2673
Publish at: 2026-06-01

Vietnamese secondary school EFL students’ motivation and attitudes toward using ChatGPT for vocabulary learning

10.11591/ijere.v15i3.38603
Thuan Anh Pham , Cuong Huy Pham
The escalating adoption of artificial intelligence (AI) in language education, particularly ChatGPT, has drastically altered vocabulary teaching and learning practices in secondary schools in Vietnam, where rote learning and teacher-centered approaches are common norms. This study examines secondary school students’ motivation and attitudes toward using ChatGPT for vocabulary development. A mixed-methods design was employed, drawing on a survey with 208 ninth-grade students and semi-structured interviews with eight of the respondents. The survey data revealed the students’ moderate degrees of motivation to use ChatGPT, with extrinsic motivation surpassing intrinsic motivation. Their attitudes were generally positive, showing relatively high enjoyment and low anxiety in utilizing ChatGPT for vocabulary learning. The students considered ChatGPT a useful and convenient resource and expressed willingness to continue using it despite their concerns over its reliability and the risk of over-reliance. The interview data augmented these patterns, highlighting ChatGPT’s interactivity and flexibility while emphasizing the continued importance of teachers’ classroom support. This study provides corroborating evidence for ChatGPT as a versatile complementary tool for vocabulary learning that fosters learners’ motivation and positive attitudes. However, its adoption requires careful integration with teacher guidance and AI literacy training.
Volume: 15
Issue: 3
Page: 2708-2715
Publish at: 2026-06-01

Artificial intelligence acceptance and procrastination: metacognitive listening awareness mediation in foreign language students

10.11591/ijere.v15i3.37246
Mohamed Ali Nemt-allah , Mohammed Hassanin AbuAl-Saoud , Ahmed Hamed Soliman , Ahmed Abdelsalam Kelany , Abdelsatar AbdelHakim Mohamed , Ashraf Ragab Ibrahim
This study aimed to investigate the mediating role of metacognitive listening awareness in the relationship between artificial intelligence (AI) acceptance and academic procrastination among university students learning foreign languages, specifically examining whether metacognitive processes explain how AI acceptance influences procrastination behaviors. A sample of 646 undergraduate students (378 males, 268 females; M age=20.49 years, SD=1.01) from Al-Azhar University, Egypt, completed the AI acceptance scale, metacognitive awareness listening questionnaire (MALQ), and academic procrastination scale during the second semester of the 2024/2025 academic year. Mediation analysis using Hayes’ PROCESS macro with 5,000 bootstrap resamples revealed that AI acceptance negatively predicted academic procrastination (β=-.196, p<.001), with metacognitive listening awareness serving as a significant partial mediator, accounting for 14.98% of the total effect. This study represents the first empirical examination of metacognitive listening awareness as a mediating mechanism in the relationship between AI acceptance and procrastination, addressing a critical gap in technology-enhanced language learning research. Educators should implement AI literacy modules within language courses that explicitly teach students to monitor their comprehension strategies while using AI tools, coupling technology training with reflective listening tasks that develop metacognitive awareness. Future research should employ longitudinal designs and examine additional mediators including self-efficacy, intrinsic motivation, and effort regulation.
Volume: 15
Issue: 3
Page: 2143-2154
Publish at: 2026-06-01

Practices and strategies of informal assessments on grammar rules among second language learners

10.11591/ijere.v15i3.37717
Jason V. Chavez , Rolly G. Salveleon , Ma. Theresa L. Eustaquio , Haydee G. Adalia , Ma. Pilar T. Rosaldo , Joseph B. Quinto , Salita D. Dimzon , Sar-Ana M. Abdurasul , Rasmil T. Abdurasul , Ivy M. Nazareth
While informal assessment offers authentic insights into second language (L2) grammar acquisition, the specific strategies and implementation challenges remain underexplored. This study investigated the practices employed by L2 educators in conducting informal grammar assessments and the obstacles they encounter. Using a qualitative exploratory design, 20 purposively selected language educators from diverse linguistic regions in the Philippines participated in semi-structured interviews. Data were analyzed using reflexive thematic analysis. The findings revealed a pedagogical shift from static testing to stealth monitoring, characterized by contextualized micro-checks, gamified strategies to lower affective filters, and peer-scaffolded evaluation. However, significant challenges emerged, specifically the tension between assessment validity and reliability, as well as cognitive overload due to the dual burden of instruction and real-time data recording. The study concluded that while educators prioritize the authenticity of low-stakes assessment, effective implementation requires enhanced assessment literacy and structural support to mitigate subjectivity and operational fatigue.
Volume: 15
Issue: 3
Page: 2379-2389
Publish at: 2026-06-01

A multi-modal framework for improving the accuracy of phishing email detection

10.11591/ijece.v16i3.pp1608-1625
Lamees Mohamed Faraj , Sayed Abdel-Gaber , Hanan Fahmy
Phishing emails continue to pose a significant cybersecurity threat, particularly through the increasing use of malicious attachments to evade traditional text-based detection systems. Most existing approaches focus primarily on email content, creating a blind spot in attachment-aware phishing detection. This paper proposes a multi-modal phishing email classification model that integrates email header features, body text analysis, and attachment inspection within an ensemble learning framework. Independent machine learning classifiers are employed for each email component, and a majority voting mechanism is used to determine the final classification decision. The proposed model is evaluated using publicly available email and attachment datasets that are combined to simulate attachment-bearing phishing emails. Experimental results demonstrate strong detection performance across multiple evaluation metrics. Nevertheless, the study acknowledges the limitation of using synthetically paired email bodies and attachments, which may not fully capture real-world semantic relationships. The findings highlight the importance of incorporating attachment-aware analysis into phishing detection systems and provide a foundation for future research on semantic consistency modeling and transformer-based architectures.
Volume: 16
Issue: 3
Page: 1608-1625
Publish at: 2026-06-01

Hybrid systems modelling and control using multiple mixed logical dynamical predictive model control: Application to a three-tank spherical system

10.11591/ijece.v16i3.pp1148-1158
Tahar Benaissa , Mohamed Fouzi Belazreg , Khaled Halbaoui , Belaid Djaroum , Djamel Boukhetala
This study employs the mixed logical dynamical (MLD) framework for modelling, simulating, and controlling hybrid dynamical systems. Hybrid systems, which combine continuous-time dynamics and discrete logical events, pose significant challenges for conventional control strategies, such as proportional-integral-derivative (PID) controllers, particularly under complex operational constraints. To address these challenges, the MLD formalism provides a unified representation that integrates differential equations, logical rules, and inequality constraints. Based on the MLD model, a multivariable hybrid model predictive control (HMPC) approach is designed to optimize control system performance and operational efficiency over a prediction time horizon. At each sampling time step, a mixed quadratic programming (MIQP) optimization problem is solved online to determine the control law. The proposed control approach is applied to a three-spherical tank system, where simulation and experimental results demonstrate its effectiveness in ensuring stability, minimizing tracking errors, and satisfying physical constraints. These results underscore the relevance of MLD-based predictive control approaches for the optimization and advanced control of complex multivariable hybrid dynamical systems in industrial fields.
Volume: 16
Issue: 3
Page: 1148-1158
Publish at: 2026-06-01

Transformer-based hybrid classification for plant leaf disease detection using vision transformer, principal component analysis, and support vector machine

10.11591/ijece.v16i3.pp1399-1406
Vijayalakshmi S. Abbigeri , Geetha D. Devanagavi
Plant diseases remain a critical challenge in agriculture, causing substantial yield losses and threatening food security. In this work, we propose a hybrid deep feature engineering framework that integrates deep learning-based feature extraction with classical machine learning for accurate plant disease detection. A pretrained vision transformer (ViT) model is employed to extract discriminative features from leaf images, effectively capturing complex spatial relationships. To address the curse of dimensionality, principal component analysis (PCA) is applied, retaining 98% of the variance while reducing feature space complexity. The refined features are then classified using a support vector machine (SVM) optimized through hyperparameter tuning. Experimental results on the bean leaf lesions dataset demonstrate strong performance, achieving 92% accuracy and a weighted F1-score of 0.92. The proposed ViT–PCA–SVM pipeline effectively balances accuracy, computational efficiency, and generalization, making it a promising solution for real-time smart farming applications.
Volume: 16
Issue: 3
Page: 1399-1406
Publish at: 2026-06-01

A new multiplier less memcapacitor emulator with non-linear applications

10.11591/ijece.v16i3.pp1132-1147
Suresha Basavanna , Chandra Shankar , Rudraswamy S. B.
This study describes a memcapacitor emulator without a multiplier that make use of second-generation current conveyor (CCII), operational trans-conductance amplifier (OTA) and the fewest possible passive components. The proposed memcapacitor is proved mathematically and verified using several simulation approaches, such as process corner, non-volatile and hysteresis analysis. Also, provided the layout of CCII and OTA as well. The standard CMOS 90 nm technology is used in the Cadence Virtuoso tool to simulate the proposed memcapacitor emulator. This article also includes the use of memcapacitor emulator in the applications of R-C frequency selective network as well as adaptable neuromorphic structure. To investigate the experimental outcomes, an experimental setup was constructed with commercially available integrated circuits (ICs) CCII’s AD844AN and OTA’s CA3080EZ.
Volume: 16
Issue: 3
Page: 1132-1147
Publish at: 2026-06-01

Designing self-healing database fabrics for real-time payment rails

10.11591/ijece.v16i3.pp1360-1368
Raghu Gollapudi
Real-time payment platforms operating at scale face an unforgiving operational reality: even brief outages translate directly into failed transactions, regulatory exposure, and eroded customer trust. Database replication and failover automation have matured considerably over the past two decades, yet a troubling blind spot remains. Recovery frameworks built for general-purpose distributed systems were never designed with settlement finality in mind, and that design omission leaves payment operators exposed to split-brain scenarios that generic high-availability tooling cannot reliably prevent. This paper addresses that omission head-on through a self-healing database fabric purpose-built for payment rail environments. The proposed autonomous resilience fabric architecture (ARFA) operates across three coordinated layers: a continuous monitoring layer that harvests telemetry from compute, storage, and network subsystems; a decision layer that fuses rule-based heuristics with an ensemble of isolation forests, recurrent neural networks, and gradient boosting classifiers to separate genuine fault conditions from transient noise; and a deterministic action layer that executes recovery procedures anchored to explicit settlement finality constraints. In fault injection trials covering node crashes, network partitions, replication lag, and performance degradation, the architecture cut average recovery times by 88% against manual baselines, restoring service in roughly 8 seconds rather than the 180 seconds that human-driven remediation typically requires. False positive rates held below 2% across all failure categories, and the system achieved a 98% recovery success rate. Taken together, these results make a practical case that autonomous resilience and regulatory compliance reinforce rather than conflict with each other when the regulatory constraints are designed in from the start.
Volume: 16
Issue: 3
Page: 1360-1368
Publish at: 2026-06-01

Performance analysis of single and multi-stage metaheuristic optimization on DFFNN for electrocardiogram-based emotion classification

10.11591/ijece.v16i3.pp1562-1575
Giovanni Dimas Prenata , Ahmad Ridho’i
Emotion classification based on electrocardiogram (ECG) signals has attracted increasing attention in affective computing and biomedical signal processing. However, training deep feedforward neural networks (DFFNN) using conventional gradient-based learning often suffers from local minima and slow convergence, particularly when dealing with nonlinear and limited datasets. This study presents a comprehensive performance analysis of single-stage and multi-stage metaheuristic optimization strategies applied to DFFNN for ECG-based emotion lassification in elderly participants. Five models were evaluated: Pure DFFNN, DFFNN optimized using genetic algorithm (GA), particle swarm optimization (PSO), grey wolf optimizer (GWO), and a hybrid multi-stage DFFNN+GA+GWO model. Experimental results from six independent trials demonstrate a substantial reduction in mean squared error (MSE) when metaheuristic optimization is applied. Pure DFFNN produced final MSE values in the range of 0.07462–0.08977, whereas DFFNN+GWO reduced MSE to 0.01894–0.02411. The proposed multi-stage DFFNN+GA+GWO achieved the lowest MSE of 0.014286 in the best run and an average MSE of approximately 0.0212 across trials. Training accuracy improved from 57.14%–66.67% (Pure DFFNN) to 80.95%–85.71% using metaheuristic pproaches. Although testing accuracy remained relatively stable at 33.33%–50.00% due to dataset size constraints, convergence behavior analysis shows that multi-stage optimization enhances stability and reduces oscillatory updates. These findings confirm that multi-stage metaheuristic optimization significantly improves training stability and error minimization in DFFNN models, offering a promising strategy for robust ECG-based emotion classification under small-sample conditions.
Volume: 16
Issue: 3
Page: 1562-1575
Publish at: 2026-06-01

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

A qualitative study of mathematical content knowledge and pedagogical content knowledge and self-perception in Moroccan context

10.11591/ijere.v15i3.36923
Jamal Ahmichane , Mostafa El Mallahi , Youness Hadder
Pre-service teachers’ (PSTs) tertiary training is essential to their development as competent educators and to their professional readiness. Teachers must acquire the ability to communicate mathematical material in a variety of ways. Teachers of excellence must be proficient in the relevant mathematics content knowledge (MCK) and possess a strong foundation in interacting successfully with students. This study on education has two objectives: looking into how secondary PSTs who take part in a mathematics teaching unit view themselves as they interact with and solidify their MCK, and investigating how these PSTs view and understand their “readiness” to take on such a task. 25 PSTs participating in postgraduate teacher preparation programs were given the pre-unit survey (Phase 1), whose answers were subject to an extensive analysis through a high level of evaluation using a framework assisting the researcher in identifying relationships among social phenomena, based on the similarities and differences that connect these phenomena. Self-reflections of participants revealed different levels of readiness to teach lower secondary students in mathematics. All participants emphasized the need to enhance their pedagogical content knowledge (PCK) and their MCK, and a very limited number of studied participants said they felt comfortable teaching mathematics. The study implies a significant issue with professional readiness and self-efficacy, and it recommends a need for earlier and more intensive practical experience integrated with strong mentorship. A number of implications for either policy or teacher training practice are proposed. This study will cover the main outcomes of Phase 1 in light of the body of current studies on preparing PSTs of mathematics.
Volume: 15
Issue: 3
Page: 2261-2270
Publish at: 2026-06-01

Human-centered higher education reform in Vietnam

10.11591/ijere.v15i3.38664
Dung Huy Nguyen , AnLong Dang Nguyen
This study uses an explanatory sequential mixed-methods design to assess the level of implementation and effectiveness of human-centered higher education innovation in Vietnam in the context of digital transformation and international integration. Instead of just analyzing policy directions, the study focuses on evaluating: i) the level of awareness of educational stakeholders regarding four content groups (technology, culture-humanities, integration, and humanities); ii) the implementation gap between direction and practice; and iii) the relative weight of each group of factors in educational innovation. Quantitative data were collected from 247 survey responses and analyzed using repeated measures ANOVA. The results showed statistically significant differences between the content groups (F(3,247)=15.32; p<0.001; η²=0.24), with the “human-centered” group having a significantly higher average score than the technology and integration group. The statistically insignificant difference between the human group and the culture group suggests a complementary relationship between these two factors. The research results provide empirical evidence that human-centered indicators can be used as evaluative benchmarks for educational innovation in the context of developing countries.
Volume: 15
Issue: 3
Page: 2121-2132
Publish at: 2026-06-01

The digital shift in parental strategies for heritage language maintenance among expatriate families in Saudi Arabia

10.11591/ijere.v15i3.37729
Musa Alghamdi , Said Muhammad Khan , Shazia Hamid , Saira Abbas
Around two-fifths of the population living in Saudi Arabia consists of expatriates. However, there is limited research on how these families maintain their heritage languages (HLs) in a digital world with limited institutional support. Maintaining HLs is important for identity, cultural continuity, and a sense of belonging across generations, especially for families living far from home. This qualitative study explores how expatriate parents in Saudi Arabia use digital tools to help their children maintain HLs, using Fishman’s reversing language shift (RLS) framework and family language policy (FLP) theory. Researchers interviewed 36 expatriate parents from 15 different national and linguistic backgrounds and analyzed the data with reflexive thematic analysis in NVivo. The results show that families are moving from exclusively home-based language practices to a mix of digital strategies, such as apps, video calls, and online learning spaces, which help strengthen cross-border connections and increase language exposure. However, these new practices also increase mothers’ workload, as they take on most of the planning, mediation, and emotional support. The study suggests policy and practical steps that fit with Saudi Arabia’s Vision 2030, such as providing subsidized multilingual digital resources and family-focused support programs. The clear research design makes the study easy to replicate, and future research should include lower-income families, children’s views, and long-term studies of digital family language practices.
Volume: 15
Issue: 3
Page: 2716-2728
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
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