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31,456 Article Results

Characterization of A2G UAV communication channels under rician fading conditions

10.11591/ijeecs.v37.i1.pp143-153
Yomi Guno , Trio Adiono , Joko Suryana , Fadjar Rahino Triputra , Asyaraf Hidayat , Siti Vivi Octaviany
The variation in the k-factor value significantly influences the performance of unmanned aerial vehicle (UAV) air-to-ground point-to-point line of sight (A2G PTP LOS) communications over a Rician channel at 1,800 MHz using quadrature phase shift keying (QPSK) modulation and orthogonal frequency division multiplexing (OFDM) techniques. The research emphasizes the impact of the k-factor, which quantifies the dominance of the line-of-sight component over multipath scattering. The variation in the k-factor significantly influences UAV A2G PTP LOS communication performance for the empirical model (EM), as it involves precise measurements of the received power level in dBm from UAV to ground control station (GCS) across varying distances and altitudes. We introduce a method to compute the k-factor by assessing the ratio of the line-of-sight signal power to the multipath signal power, thereby enhancing channel modeling accuracy. Empirical analysis shows a strong correlation between bit error rate (BER) and signal-to-noise ratio (SNR) with differing k-factor values; a higher k-factor of 16.3 markedly improves performance, virtually eliminating errors at a 10 dB SNR, while a lower k-factor of 2.39 still shows significant errors at a 30 dB SNR. These results highlight the necessity of optimizing the k-factor in UAV A2G PTP LOS systems to ensure stable and reliable communication under diverse operational conditions.
Volume: 37
Issue: 1
Page: 143-153
Publish at: 2025-01-01

EMSPLA for accurate feature molecular extraction from protein-ligand interactions

10.11591/ijeecs.v37.i1.pp580-589
Srinidhi Kulkarni V , Ganesh Dhandapani , Kureeckal V. Ramesh
Protein-ligand interactions are fundamental in various biological and medical fields, influencing drug discovery and therapeutic development. In recent years, deep learning (DL) has revolutionized the study of these interactions, but significant challenges remain in accurately representing molecular structures for DL models. Traditional featurization techniques often depend on handcrafted features, requiring expert knowledge and potentially missing crucial molecular aspects. This work addresses these challenges by developing and evaluating a novel protein-ligand feature extraction system using an enhanced molecular similarity protein-ligand aligner (EMSPLA). The primary objective is to leverage EMSPLA for similarity matching in protein-ligand interactions, improving predictive model accuracy. The methodology combines convolutional neural networks (CNN) for local feature extraction with an attention module to capture long-distance dependencies, enhancing binding site predictions. Using the PDBbind v.2020 dataset, the EMSPLA model demonstrated superior performance with a root mean square error (RMSE) of 0.67, surpassing current state-of-the-art models. These findings highlight the system’s potential for efficient deployment and scalability, positioning it as a powerful tool in computational biology and drug discovery, ultimately advancing our understanding of protein-ligand interactions.
Volume: 37
Issue: 1
Page: 580-589
Publish at: 2025-01-01

Enhancing hyperspectral image object classification through robust feature extraction and spatial-spectral fusion using deep learning

10.11591/ijeecs.v37.i1.pp279-287
Vijaylaxmi Kochari , Sanjeev S. Sannakki , Vijay S. Rajpurohit , Mahesh G. Huddar
Hyperspectral imaging (HSI) has gained significant attention in recent years due to its broad applications across agriculture, environmental monitoring, urban planning, infrastructure management, and defense and security for object detection and classification. Despite its potential, current methodologies face challenges such as insufficient feature extraction, noise interference, and inadequate spatial-spectral fusion, limiting classification accuracy and robustness. This study reviews advancements in HSI object detection and classification methodologies, emphasizing the role of machine-learning (ML) and deep-learning (DL) techniques. Hence, this work proposes a novel framework to address these challenges, prioritizing robust feature extraction, effective spatial-spectral fusion, and comprehensive noise removal mechanisms. By integrating DL techniques and training with HSI noisy data, this framework aims to enhance classification accuracy and robustness. The findings suggest that the proposed approach significantly improves the reliability and performance of HSI-based object classification systems. This research provides a pathway for future development in the domain, promising to elevate the effectiveness of HSI applications in real-world scenarios.
Volume: 37
Issue: 1
Page: 279-287
Publish at: 2025-01-01

Innovative virtual reality solutions for technical training in heavy construction equipment repair and maintenance

10.11591/ijeecs.v37.i1.pp627-635
Wirawan Istiono , Andhika Nugraha Wira Pratama
The construction industry is significantly impacted by heavy construction equipment, including bulldozers, excavators, and vehicles. This equipment speeds up building, moves supplies, and builds infrastructure. Using heavy construction equipment correctly can boost productivity and shorten project timelines. Due to their complexity and scale, this equipment must be maintained and repaired. Poor maintenance and repair of heavy construction equipment can reduce performance, damage, and even cause accidents. Due to these problems, this study focuses on the design and development of a simulation training application to enhance the technical skills of workers in maintaining and repairing heavy construction equipment using virtual reality (VR) technology, the development of this application will be carried out using Unreal Engine 5 and thereafter tested and implemented at PT Menara Indonesia or M-Knows Consulting, Indonesia. At the end of this study, the design and development of a VR training simulation application for heavy equipment repair has been successfully completed. After testing the VR application and conducting user acceptance tests, it was concluded that the created VR application greatly assists M-Knows Consulting in training workers to perform maintenance and repair on heavy equipment, with a user acceptance rate of 84%.
Volume: 37
Issue: 1
Page: 627-635
Publish at: 2025-01-01

Optimizing carrier transport properties in the intrinsic layer of a-Si single and double junction solar cells through numerical design

10.11591/ijeecs.v37.i1.pp69-77
Soni Prayogi , Dadan Hamdani , Darminto Darminto
This research aims to improve the performance of a-Si: H solar cells, particularly in terms of carrier transport properties, through a numerical design approach utilizing AFORS-HET simulation software. By performing a series of rigorous computer simulations, we explore the potential regulation of the intrinsic layer thickness, carrier mobility, loading factor, and density of states (DoS) distribution in the solar cell's intrinsic layer. Recombination losses are reduced, and light absorption efficiency is significantly increased when the intrinsic layer thickness is adjusted, as shown by simulation findings. Moreover, reduction of transit times and enhancement of the total efficiency of the solar cells depend on increased carrier mobility. Parameters can be adjusted to attain optimal performance under various operating situations by adjusting the DoS and load factors. Furthermore, the simulations provide insightful information about the interactions between the junctions in solar cells with double junctions. Our results of this research provide an important contribution to efforts to develop more efficient and sustainable a-Si: H solar cells and emphasize the importance of numerical design approaches in photovoltaic technology.
Volume: 37
Issue: 1
Page: 69-77
Publish at: 2025-01-01

Implementing zero-knowledge proof authentication on Hyperledger fabric to enhance patient privacy and access control

10.11591/ijeecs.v37.i1.pp498-506
Praveena Bolly Joshi , Arivazhagan Natesan
In recent years, the healthcare sector has encountered significant challenges in authenticating identities for online medical services. A predominant reliance on centralized identity management systems (IDMs) has presented obstacles to the seamless exchange of patient identities among various healthcare institutions, often resulting in data isolation within individual silos. Of paramount concern are the potential privacy breaches associated with centralized IDMs, which may compromise patient confidentiality. In response to these challenges, we propose a novel approach to securely sharing patient details across multiple hospitals utilizing the zero-knowledge access protocol (MediCrypt-ZKAP) within the Hyperledger Fabric blockchain framework. By adopting MediCrypt-ZKAP, hospitals can effectively verify the identities of requesting entities without disclosing sensitive patient information, thereby ensuring the highest levels of confidentiality and privacy protection. The proposed system represents a proactive step towards addressing the critical need for secure and interoperable patient data exchange within the healthcare sector. Through the integration of MediCrypt-ZKAP into existing blockchain infrastructure, our solution aims to enhance data security and privacy while promoting seamless collaboration among healthcare institutions.
Volume: 37
Issue: 1
Page: 498-506
Publish at: 2025-01-01

Virtual inertia evaluation for frequency instability in renewable energy integration

10.11591/ijeecs.v37.i1.pp380-388
Shilpa Keshubhai Kathad , Dharmesh Jagdishchandra Pandya
In recent trends, the increasing integration of renewable energy sources (RES) into grids has provides a transition in electricity generation and distribution in terms of frequency instability. Recently, the concept of virtual inertia (VI) has developed as a promising solution to minimize frequency instability in interconnected RES. Therefore, this research introduces VI evaluation technique to decrease the frequency instability. Advanced control algorithms are used to create VI, which simulates the stabilizing effect of traditional rotating mass in conventional power systems. The high penetration of RES based on power converters has suggestively decreased the VI which making them susceptible to frequency instability. This work recommends another use of VI control to further develop recurrence dependability of the connected power framework because of high entrance level of RESs. ∆f values differ between 17.4215 and 20.3621 with significant frequency variations due to conventional control. Equally, VI control exhibits a high level of efficiency in reducing frequency deviations; The ∆f values were consistently smaller between 0.0236 and 0.0369 than the conventional control. These findings signify the potential of VI control to improve frequency stability in power systems with RES.
Volume: 37
Issue: 1
Page: 380-388
Publish at: 2025-01-01

A dual-band rectangular shape incorporated into circular patch antenna for 2.4/5 GHz wireless local area network applications

10.12928/telkomnika.v23i1.26519
Suthasinee; Rajamangala University of Technology Isan Khonkaen Campus Lamultree , Nattakarn; Rajamangala University of Technology Isan Khonkaen Campus Somsanook , Wararak; Rajamangala University of Technology Isan Khonkaen Campus Narkkoht , Chuwong; King Mongkut’s Institute of Technology Ladkrabang Phongcharoenpanich
This research exhibits a design of a dual-band patch antenna (DBPA) implemented by a rectangular shape incorporated into a circular patch together with a pair of half-wavelength inverted U-slots (HWIUSs) with the single feed for 2.4/5 GHz wireless local area network (WLAN) applications. For this work, the HWIUSs are key in designing a dual-band antenna. The DBPA is fed by a 50-Ohm microstrip line, printed on a copper layer overlaid on an FR4 substrate with a relative permittivity of 4.3 and height of 1.6 mm, while the bottom layer is backed by a partial ground plane. An antenna prototype with a dimension of 0.384λ_L×0.304λ_L×0.013λ_L was contrived and admeasured to verify the simulation. The measurement provides a nearly omnidirectional pattern with a 2.55 and 3.3 dBi peak gain covering a dual-band 10 dB return loss bandwidth of 15% (2.4–2.8 GHz) and 20% (4.96–5.86 GHz), respectively. Noticeably, simulated |S11| and radiation patterns are reasonable following experimental results showing its potential in 2.4/5 GHz WLAN services.
Volume: 23
Issue: 1
Page: 22-31
Publish at: 2025-01-01

A systematic literature review of the impact of gamification instruction on students’ problem-solving skills

10.11591/ijere.v13i6.29695
Jiyuan Feng , Wee Hoe Tan , Bin Yu
Gamification is a popular approach to teaching and learning in education in recent years, it provides the flexible integration of various game elements into educational activities to achieve instructional objectives. This approach has the potential to enhance student skills through interactive communication and motivation and has, sparked interest and discussion in many fields, including education. This review assesses the impact of gamification on student skills in terms of teaching methods, learning outcomes, and challenges faced. The study analyzed 21 research articles from three databases, Web of Science (WoS), Scopus, and ERIC, up to November 2023. The findings were grouped into three main themes: teaching implementation and methods (8 articles), learning outcomes and skill development (8 articles), and challenges and improvement strategies (5 articles). The findings suggest that although gamification has gained more results in the field of education, especially in terms of improving students’ skills and teaching effectiveness, there are shortcomings in integrating it with professional education. This review mainly highlights the impact of gamification in the development of students’ skills while considering gamification in conjunction with other aspects of education to illustrate the need for ongoing research and further exploration in the field of education.
Volume: 13
Issue: 6
Page: 4082-4092
Publish at: 2024-12-01

Enhancing pre-service teachers’ TPACK through the integrating of community of practice and lesson study

10.11591/ijere.v13i6.29240
Kanyarat Cojorn , Chaweewan Seesom
This study explores the impact of a combined community of practice (CoP) and lesson study (LS) approach on fostering technology pedagogical content knowledge (TPACK) in student teachers. TPACK encompasses various knowledge areas, including technological knowledge (TK), content knowledge (CK), pedagogical knowledge (PK), pedagogical content knowledge (PCK), technology content knowledge (TCK), and technology pedagogical knowledge (TPK). The study employs combined CoP-LS practices in two distinct CoPs: CoP A characterized by varied experiences, and CoP B comprising members with comparable experiences. Data gathered through questionnaires and group discussions. The findings reveal that the CoP-LS activities effectively enhance TPACK among student teachers, leading to improved confidence in designing learning activities. Both CoP A and CoP B show overall enhancements in TPACK, with CoP A exhibiting superior development across all dimensions. Further analysis demonstrates that CoP A exhibits greater advancements in PK and PCK, transitioning from the adapting level to the advancing level. Moreover, TCK and TPK demonstrate progress from the exploring level to the advancing level within CoP A. In contrast, CoP B showcases advancements in TK from the exploring level to the advancing level, while no notable changes are observed in CK, PK, PCK, TCK, and TPK.
Volume: 13
Issue: 6
Page: 4237-4246
Publish at: 2024-12-01

Understanding the significance of Olympic values in adults of Chile and Argentina

10.11591/ijere.v13i6.29904
Alejandro Bacot Tamayo , Pedro Danilo Ponciano Nuñez , Frano Giakoni-Ramírez , Jorge Flández-Valderrama , Daniel Duclos-Bastías
Olympic values serve as a significant educational strategy advocated by both the International Olympic Committee and National Olympic Committees globally. Despite their widespread promotion, there exists a dearth of research comparing the comprehension of Olympic values among the adult population. This study aimed to scrutinize the understanding of Olympic values among a sample of 200 Chilean and Argentine adults aged between 18 and 65 years. The investigation was conducted in the context of recent mega sporting events, specifically the Youth Olympic Games in Buenos Aires 2018 and the forthcoming Pan American Games in Santiago 2023. Employing the Fair Play theory and the Moral Competence Test, the research revealed a higher level of moral competence in the Argentine population compared to their Chilean counterparts. Interestingly, no discernible impact of the Youth Olympic Games in Buenos Aires was observed in Argentina. Parental influence emerged as the most significant factor affecting moral competence in both countries, while religion and media demonstrated comparatively less influence. These findings contribute to a more nuanced understanding of the interplay between Olympic values, moral competence, and contextual factors in adult populations across different nations.
Volume: 13
Issue: 6
Page: 4420-4428
Publish at: 2024-12-01

Pronunciation therapy for deaf students in coping with Arabic letter difficulties

10.11591/ijere.v13i6.27467
Rika Astari , Abdul Mukhlis , Hanif Cahyo Adikistoro , Tri Purwanti , Muhammad Irfan Faturrahman , Rudy Yuniawati , Choirul Mahfud
Pronunciation therapy for deaf students is a very important context within the sphere of the Quran learning. Previous investigations in this domain predominantly focused on media and visual approaches, neglecting the discussion of Arabic letter pronunciation therapy (phonetically). Therefore, this research aimed to elucidate various forms of pronunciation therapy designed for deaf students and the underlying factors motivating the use of the therapeutic techniques. This descriptive qualitative research relied on the primary data collected through an investigation conducted at Qotrunnada Islamic Special School (SLB) in Bantul, Yogyakarta, Indonesia. The primary data comprised the diverse methods applied in Arabic letter pronunciation therapy and the determinant factors of articulation disorders. The research subjects were limited to pure deaf students, categorized by age and the length of therapy. Each student exhibited different results of assessment and response to pronunciation therapy. Moreover, data validation was performed through interaction with the school principal as the research team. The results showed that the forms of pronunciation therapy included articulation therapy (phonetically) exercises addressing sound production, as well as interventions targeting attention and behavior for deaf students in coping with Arabic letter difficulties. This contribution would serve as a basic guide in the development of instruments for Arabic letter pronunciation therapy designed for students with special needs.
Volume: 13
Issue: 6
Page: 4212-4224
Publish at: 2024-12-01

Nominal group techniques to assess teachers’ readiness for online teaching at higher education institution

10.11591/ijere.v13i6.27462
Farah Damia Mohd Nasir , Toto Nusantara , Norliza Ghazali , Siti Salina Mustakim , Ade Eka Anggraini
Education 4.0 marks a new era of learning with virtual online classrooms, requiring teachers to adapt. Despite this shift, standardized tools to evaluate teachers’ online instruction readiness are lacking. This article explores nominal group technique (NGT) in the design and development research (DDR) need analysis stage to identify challenges in online teaching and the need for a new assessment tool in higher education. There were 15 professionals from Malaysia and Indonesia contributed insights to identify key educator challenges. Results show validation of study topics with over 70% agreement, highlighting the urgent need for a reliable tool to assess educators’ online instruction competence in higher education. These findings inform further instrument development.
Volume: 13
Issue: 6
Page: 3945-3951
Publish at: 2024-12-01

Reviewing coastal culture and traditions for English teaching materials

10.11591/ijere.v13i6.28597
Maya Pinkan Warouw , Elvy Like Ginting , Henry Fanny Tondo
Women’s empowerment can be encouraged via English teaching and teaching materials can be utilized to strengthen gender equality and women’s empowerment, particularly for students from coastal areas pursuing higher education at universities. This research aims to determine how English language teaching (ELT) materials in universities can be adapted and incorporated into English instruction from the perspective of female students from coast. The data for this study were acquired using a qualitative technique, which included the distribution of questionnaires and interviews with female students from coastal locations. The information gathered from the questionnaire was mostly demographic. In the meanwhile, interviews were held to collect thoughts from participants on coastal traditions and cultures that might be included into teaching materials. The findings reveal a clear correlation between individuals’ perspectives and their experiences shaped by traditions and cultural heritage of coastal regions. Female participants highlight the depth of coastal culture, it is interaction with the environment, the crucial role of women in preserving traditions, and the desire for representation in university-level English teaching materials. These insights, derived from the experiences and viewpoints of female students in a coastal setting, extend beyond their locale, offering valuable lessons for English learning approaches in diverse coastal communities
Volume: 13
Issue: 6
Page: 3787-3795
Publish at: 2024-12-01

The effect of empowerment to improve patient safety culture among hospital nurses

10.11591/ijphs.v13i4.24418
Rusdi Rusdi , Faridah Mohd Said , Nur Syazana Umar
A decline in the quality of services provided to patients and an increase in patient care costs are caused by a decline in their ability to work. Patient safety culture is a product of individual and group values, attitudes, competencies, and behavioral patterns that determine the commitment, style, and capabilities of a health service organization towards patient safety programs. This study examined the effects of empowerment on patient safety culture and employed descriptive, cross-sectional, analytical methodology. Proportionate random sampling was the sample method used at a hospital in Samarinda, Indonesia, with 119 respondents. Hospital surveys regarding patient safety culture and empowerment were used to gather data. Partial least squares and structural equation modeling were used for data analysis. Regarding opportunity indications for activities, the empowerment average had the highest score, 15.8 (SD=2.987). For teamwork within the unit, the patient safety culture had the highest average score of 13.3 (SD=1.777). The initial sample estimate value of 0.677 indicated that empowerment had a positive impact on patient safety culture. The T-Test result was 15.180, indicating that the value was greater than 1.98. Nurses’ autonomy in their work can be supported through empowerment. The stronger the empowerment, the more patient-safety culture the hospital will have.
Volume: 13
Issue: 4
Page: 1903-1911
Publish at: 2024-12-01
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