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All Journal International Journal of Electrical and Computer Engineering GUYUB: Journal of Community Engagement
Nurkahfi, Galih Nugraha
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Implementasi Teknologi Content Delivery Network (CDN) Sebagai Akselerasi Digitalisasi Sekolah Syambas, Nana Rachmana; Ahdan, Syaiful; Hamidi, Eki Ahmad Zaki; Negara, Ridha Muldina; Mayasari, Ratna; Nurhayati, Ade; Nurkahfi, Galih Nugraha; Jupriyadi, Jupriyadi; Sucipto, Adi; Arifin, Hasan Nur; Tulloh, Rohmat
GUYUB: Journal of Community Engagement Vol 6, No 1 (2025): Maret
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/guyub.v6i1.9812

Abstract

Abstract. This community service program aims to accelerate the digitalization of education in Pesisir Barat Regency, Lampung Province, through the implementation of Content Delivery Network (CDN) technology using Starlink services and the Learning Management System (LMS) Moodle. The 3T areas (frontier, outermost, and underdeveloped) in this region face infrastructure challenges that hinder stable and fast internet access, which is crucial to support technology-based learning processes. This program involves the installation of network devices, such as Starlink for stable internet access, gigabit switches, and the integration of the Moodle-based e-learning system. Additionally, intensive training is provided to teachers, administrators, and students on using Moodle as a digital learning platform and managing technology-based educational content. The program's success is measured through several parameters, including internet stability and speed, the improvement of digital skills among teachers and students, and the adoption and utilization rates of LMS Moodle in the learning process. Speed test results show a significant improvement. Survey results indicate a substantial impact on teachers' digital literacy. Based on questionnaires distributed to a total of 30 training participants, 60% (18 participants) reported being very satisfied with the alignment of the training materials with their needs. Regarding the delivery of the materials, 63.33% (19 participants) were very satisfied, 26.67% (8 participants) were satisfied, 6.66% (2 participants) were neutral, and 3.33% (1 participant) were very dissatisfied. Direct observation during the implementation showed that teachers could effectively utilize Moodle LMS to manage digital classes. They were trained to create and organize teaching materials, assign tasks, and monitor student progress. This evaluation also highlights the potential for replicating and sustaining the program in other schools within similar regions. Through this evaluation approach, the program is expected to have a tangible impact on improving the quality of learning, expanding digital access, and serving as a model for implementation in other 3T areas across Indonesia.
Penerapan Teknologi Content Delivery Network (CDN) untuk Mendukung Digitalisasi Sekolah di Daerah 3T Syambas, Nana Rachmana; Ahdan, Syaiful; Hamidi, Eki Ahmad Zaki; Mayasari, Ratna; Nurhayati, Ade; Nurkahfi, Galih Nugraha; Jupriyadi, Jupriyadi; Sucipto, Adi; Arifin, Hasan Nur; Tulloh, Rohmat
GUYUB: Journal of Community Engagement Vol 6, No 4 (2025): Desember
Publisher : Universitas Nurul Jadid

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33650/guyub.v6i4.12976

Abstract

This Community Service Program was implemented at SMKS Bumi Moro, Pulau Morotai Regency, a school located in a frontier, outermost, and underdeveloped (3T) region. The school was selected due to its limited telecommunication infrastructure, which has significantly constrained the implementation of digital learning. An initial survey revealed that the school relied on a single unstable internet access point, had only 12 active computers for approximately 180 students, and most teachers lacked experience in independently operating a Learning Management System (LMS). These conditions highlighted the urgent need for technological intervention. The program adopted a Participatory Action Research (PAR) approach consisting of four stages: (1) needs analysis through online surveys and interviews with the school principal and 20 teachers; (2) design and implementation of a local Content Delivery Network (CDN) integrated with Starlink-based internet connectivity; (3) training and mentoring on Moodle LMS utilization and the introduction of Artificial Intelligence (AI) applications in learning; and (4) evaluation of program effectiveness. The training involved 30 participants, including 20 teachers and 10 educational staff members. Evaluation using a Likert-scale questionnaire (1–5) showed that 70% of participants were very satisfied and 30% were satisfied, with average scores ranging from 4.6 to 4.9. Post-program observations indicated improved teacher capacity in managing digital classes, conducting online assessments, and utilizing stable internet access. Overall, the program successfully strengthened digital learning infrastructure and teacher competence, offering a replicable model for other schools in 3T regions in Indonesia.
Impact of carrier frequency offset and in-phase and quadrature imbalance on the performance of wireless precoded orthogonal frequency division multiplexing Suyoto, Suyoto; Subekti, Agus; Satyawan, Arief Suryadi; Armi, Nasrullah; Ali Wael, Chaeriah Bin; Nurkahfi, Galih Nugraha
International Journal of Electrical and Computer Engineering (IJECE) Vol 12, No 5: October 2022
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijece.v12i5.pp5153-5163

Abstract

Precoding in orthogonal frequency division multiplexing (OFDM) system proved to reduce the peak-to-average power ratio (PAPR), so that it improves BER. However, from the existing literature, the effect of carrier frequency offset (CFO), in-phase and quadrature (IQ) imbalance on precoded wireless OFDM systems has not been carried out. Therefore, this study evaluated the precoded OFDM (P-OFDM) system performance by considering the impact of CFO and IQ imbalance. P-OFDM performance evaluation is expressed in signal-to-interference noise ratio (SINR) and bit error rates (BER). The communication channels used are the additive white Gaussian noise (AWGN) channel and the frequency-selective Rayleigh fading (FSRF) channel, while the channel equalization process is considered perfect. The results of the analysis and simulation show that P-OFDM is greater affected by the presence of CFO and IQ imbalance than conventional OFDM system. In AWGN channel, P-OFDM experiences different SINR for each subcarrier. This is different from conventional OFDM system, where all SINRs are the same for all subcarriers. In the FSRF channel, both the POFDM system and the OFDM system experience different SINR for each subcarrier, where the SINRs fluctuation in the P-OFDM system is much larger than in the OFDM system.
Co-Authors Ade Nurhayati, Ade Adi Sucipto, Adi Agus Subekti Ahdan, Syaiful Arifin, Hasan Nur Chaeriah Bin Ali Wael, Chaeriah Bin Hamidi, Eki Ahmad Zaki Jupriyadi, Jupriyadi Nana Rachmana Syambas Nasrullah Armi Ratna Mayasari Ridha Muldina Negara ROHMAT TULLOH Satyawan, Arief Suryadi Suyoto Suyoto