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All Journal Elkom: Jurnal Elektronika dan Komputer JOIN (Jurnal Online Informatika) MIND (Multimedia Artificial Intelligent Networking Database) Journal Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat JSI (Jurnal sistem Informasi) Universitas Suryadarma JISICOM (Journal of Information System, Infomatics and Computing) Scientific Journal of Informatics Jurnal Teknik Industri Terintegrasi (JUTIN) Djtechno: Jurnal Teknologi Informasi Jurnal Sistem Informasi, Teknik Informatika dan Teknologi Pendidikan (JUSTIKPEN) Jurnal Teknik Informatika JUSIFOR : Jurnal Sistem Informasi dan Informatika Jurnal Ilmiah Sistem Informasi Edutik : Jurnal Pendidikan Teknologi Informasi dan Komunikasi Jurnal Nasional Komputasi dan Teknologi Informasi
Helmy Dzulfikar
Program Studi Sistem Informasi, Universitas Siliwangi, Tasikmalaya, Indonesia
Religion Agriculture, Biological Sciences & Forestry Arts Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Mechanical Engineering Social Sciences Other

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The Comparison of Audio Analysis Using Audio Forensic Technique and Mel Frequency Cepstral Coefficient Method (MFCC) as the Requirement of Digital Evidence Helmy Dzulfikar; Sisdarmanto Adinandra; Erika Ramadhani
JOIN (Jurnal Online Informatika) Vol 6 No 2 (2021)
Publisher : Department of Informatics, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/join.v6i2.702

Abstract

Audio forensics is the application of science and scientific methods in handling digital evidence in the form of audio. In this regard, the audio supports the disclosure of various criminal cases and reveals the necessary information needed in the trial process. So far, research related to audio forensics is more on human voices that are recorded directly, either by using a voice recorder or voice recordings on smartphones, which are available on Google Play services or iOS Store. This study compares the analysis of live voices (human voices) with artificial voices on Google Voice and other artificial voices. This study implements the audio forensic analysis, which involves pitch, formant, and spectrogram as the parameters. Besides, it also analyses the data by using feature extraction using the Mel Frequency Cepstral Coefficient (MFCC) method, the Dynamic Time Warping (DTW) method, and applying the K-Nearest Neighbor (KNN) algorithm. The previously made live voice recording and artificial voice are then cut into words. Then, it tests the chunk from the voice recording. The testing of audio forensic techniques with the Praat application obtained similar words between live and artificial voices and provided 40,74% accuracy of information. While the testing by using the MFCC, DTW, KNN methods with the built systems by using Matlab, obtained similar word information between live voice and artificial voice with an accuracy of 33.33%.
IoT Application in a Vision-Based Security System at the At-Taqwa Mosque in Cijulang Nurul Hiron; Rian Nurdiansyah; M.Aris Risnandar; Andri Ulus R; Helmy Dzulfikar; Aldy Putra Aldya
ABDIMAS: Jurnal Pengabdian Masyarakat Vol. 8 No. 1 (2025): ABDIMAS UMTAS: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM Universitas Muhammadiyah Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35568/abdimas.v8i1.5564

Abstract

The use of Internet of Things (IoT) technology has become a trend in various areas of life. In the context of security and monitoring, IoT applications can provide innovative solutions to improve monitoring and protection. This community service program aims to apply the IoT concept in a vision-based security system at the At-Taqwa Cijulang Mosque. Through the integration of sensors and vision devices connected to an IoT network, this program proposes a more effective and efficient solution for monitoring mosque security. Motion and presence sensors will be installed to detect suspicious activity and manage the environment within the mosque. The vision-based security system will use cameras connected to an IoT network to monitor and identify people and activities occurring in the mosque area. In addition, a mobile application will be developed to provide real-time monitoring access to mosque administrators and the local community. The results of the service showed increased security in the environment around the mosque as well as increased awareness of security in the community around the At-Taqwa Cijulang Mosque.
The Comparison of Audio Analysis Using Audio Forensic Technique and Mel Frequency Cepstral Coefficient Method (MFCC) as the Requirement of Digital Evidence Dzulfikar, Helmy; Adinandra, Sisdarmanto; Ramadhani, Erika
JOIN (Jurnal Online Informatika) Vol 6 No 2 (2021)
Publisher : Department of Informatics, UIN Sunan Gunung Djati Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/join.v6i2.702

Abstract

Audio forensics is the application of science and scientific methods in handling digital evidence in the form of audio. In this regard, the audio supports the disclosure of various criminal cases and reveals the necessary information needed in the trial process. So far, research related to audio forensics is more on human voices that are recorded directly, either by using a voice recorder or voice recordings on smartphones, which are available on Google Play services or iOS Store. This study compares the analysis of live voices (human voices) with artificial voices on Google Voice and other artificial voices. This study implements the audio forensic analysis, which involves pitch, formant, and spectrogram as the parameters. Besides, it also analyses the data by using feature extraction using the Mel Frequency Cepstral Coefficient (MFCC) method, the Dynamic Time Warping (DTW) method, and applying the K-Nearest Neighbor (KNN) algorithm. The previously made live voice recording and artificial voice are then cut into words. Then, it tests the chunk from the voice recording. The testing of audio forensic techniques with the Praat application obtained similar words between live and artificial voices and provided 40,74% accuracy of information. While the testing by using the MFCC, DTW, KNN methods with the built systems by using Matlab, obtained similar word information between live voice and artificial voice with an accuracy of 33.33%.
EVALUASI MANAJEMEN LAYANAN TEKNOLOGI INFORMASI DENGAN FRAMEWORK ITIL V4 PADA SISTEM E-PRESENSI BKPSDM KABUPATEN CIAMIS Dewi Puspita Sari; Insiroh Amaliana; Lauren Nugraha; Sendy Seftiawan; Helmy Dzulfikar
Jurnal Ilmiah Informatika Vol. 10 No. 2 (2025): Jurnal Ilmiah Informatika
Publisher : Department of Science and Technology Ibrahimy University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35316/.v10i2.8406

Abstract

The Ciamis Regency BKPSDM has implemented a mobile-based electronic attendance system (e-attendance) to improve the discipline of civil servants. This study aims to evaluate the IT service management of the e-attendance system using the ITIL V4 framework. The evaluation focuses on eight service management practices: Availability, Incident, Problem, Service Desk, Service Level Management, IT Asset, Monitoring & Event, and Service Request Management. This study uses a mixed method, collecting quantitative data through questionnaires to civil servants who are educators and qualitative data through interviews with the BKPSDM IT Team. The main objectives are to measure the level of maturity, analyze the gap between user perceptions, internal realities, and ideal conditions according to ITIL, and provide strategic improvement recommendations. The results of the study show a significant perception gap, namely that civil servants assess services at Level 4 (Quantitatively Managed), while the reality of the IT Team's internal processes is mostly at Level 2 (Managed). This gap arises because user satisfaction is based on rapid problem resolution, while the internal processes lack formal documentation and standardization, such as a ticketing system and internal SLAs. Consequently, the recommendations prioritize establishing structured procedures and formal controls to elevate the maturity of the core service practices found to be crucial. Recommendations are focused based on their level of urgency, namely on improving Incident Management, Service Level Management, and Service Request Management to close this gap.
Analisis dan Evaluasi Infrastruktur Jaringan di SMA Negeri 3 Tasikmalaya Dardha, Muhamad Yusa; Ikhlas, Andri Nur; Dzulfikar, Helmy
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.57831

Abstract

This study aims to analyze and evaluate the computer network infrastructure at SMA Negeri 3 Tasikmalaya, which highly depends on an internet connection for school operational activities, such as Dapodik, Computer Based Test (CBT) exams, and e-Raport. Although the school has implemented a dual ISP architecture, allocating the Indibiz line for Administration and a 100 Mbps iForte line for teachers and students, users frequently experience network performance degradation or bottlenecks during peak hours. Furthermore, wireless signal coverage currently reaches only 60%, resulting in the emergence of blank spot areas. Network performance evaluation was conducted using Quality of Service (QoS) parameters based on TIPHON standards. The analysis results indicate that during peak hours, the throughput value falls into the "Poor" category due to the absence of an adaptive bandwidth management system to handle hundreds of users. Issues regarding physical device stacking and security vulnerabilities resulting from a malware attack incident on the virtual server were also discovered. This study recommends implementing bandwidth management using the Per Connection Queue (PCQ) method on Mikrotik, restructuring and adding Access Points, as well as enhancing active network security and monitoring systems.
Evaluasi Kualitas Layanan Jaringan Topologi Daisy Chain Menggunakan NDLC dan TIPHON di SMA Negeri 5 Tasikmalaya Nala, Darrennala Sandeyamugni; Rifka Maulana Yusup, Mochamad; Dzulfikar, Helmy
JEKIN - Jurnal Teknik Informatika Vol. 6 No. 1 (2026)
Publisher : Yayasan Rahmatan Fidunya Wal Akhirah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58794/jekin.v6i1.2122

Abstract

Infrastruktur jaringan komputer di institusi pendidikan sering menghadapi tantangan stabilitas performa seiring kompleksitas topologi yang digunakan. Penelitian ini bertujuan mengevaluasi kualitas layanan jaringan di laboratorium komputer SMA Negeri 5 Tasikmalaya yang menggunakan penyedia iForte dengan bandwidth 200 Mbps dan topologi daisy chain (estafet) antar switch unmanaged. Metode yang digunakan adalah Network Development Life Cycle (NDLC) yang dibatasi pada tahap analisis dan pemantauan, dengan standar evaluasi Quality of Service (QoS) mengacu pada TIPHON. Pengambilan data dilakukan secara real‑time menggunakan Wireshark untuk analisis paket dan NetSpot untuk pemetaan kekuatan sinyal nirkabel frekuensi 5 GHz. Hasil penelitian menunjukkan bahwa throughput di Lab A (titik awal) mencapai 8,47 Mbps, sedangkan di Lab C (titik ujung) turun menjadi 2,51 Mbps (penurunan ≈70%), yang mengindikasikan bahwa setiap hop tambahan dalam topologi daisy chain menurunkan throughput secara signifikan dan berpotensi mengganggu kegiatan pembelajaran daring seperti ujian online dan konferensi video. Packet loss di Lab C tercatat 2,1% dan delay rata‑rata meningkat dari 10,2 ms (Lab A) menjadi 33–46 ms (Lab C). Kekuatan sinyal di area pojok Lab A turun hingga -72 dBm (kategori kurang optimal). Secara keseluruhan, parameter QoS masih dalam kategori baik hingga sangat baik, namun topologi daisy chain menyebabkan akumulasi latensi dan bufferbloat yang signifikan. Penelitian ini merekomendasikan migrasi ke topologi bintang dan optimalisasi penempatan access point untuk menjamin distribusi performa merata.
PERANCANGAN ULANG DAN OPTIMALISASI INFRASTRUKTUR JARINGAN KOMPUTER MENGGUNAKAN METODE NDLC DI MAN 5 TASIKMALAYA Ardi Al ansori; Ghani Rizki Ferrari; Helmy Dzulfikar
Journal of Information System, Informatics and Computing Vol 10 No 1 (2026): JISICOM (June 2026)
Publisher : Sekolah Tinggi Manajemen Informatika dan Komputer Jayakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52362/jisicom.v10i1.2400

Abstract

This study redesigns the network infrastructure of MAN 5 Tasikmalaya using the NDLC method to resolve traffic congestion during peak exam hours caused by the use of HUBs in 12-15 classrooms. The primary issue of collision domains was confirmed through Wireshark analysis, which identified packet retransmissions, and nPerf testing, which showed a low browsing score of 56.43% despite a 129.21 Mbps capacity. To address this, the architecture was upgraded to an Extended Star topology by replacing HUBs with Managed Switches and implementing bandwidth management via MikroTik (Simple Queue and hotspot cookies). Validation through Cisco Packet Tracer confirmed successful connectivity across all segments, concluding that eliminating collision domains and optimizing traffic significantly improves network stability and quality of service.
Evaluasi Infrastruktur WLAN dan Redesain Jaringan Lokal Menggunakan Metode PPDIOO untuk Optimalisasi Perangkat Jaringan Lokal (Studi Kasus: Dinas Komunikasi dan Informatika Kabupaten Ciamis) Fadlilahadian; Hifzhan Abdillah Rojabi -; Helmy Dzulfikar
Edutik : Jurnal Pendidikan Teknologi Informasi dan Komunikasi Vol. 6 No. 2 (2026): EduTIK : April 2026
Publisher : Jurusan PTIK Universitas Negeri Manado

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.67142/edutik.v6i2.346

Abstract

Efisiensi infrastruktur jaringan nirkabel menjadi aspek penting dalam mendukung operasional instansi pemerintahan di era transformasi digital. Namun, kondisi jaringan WLAN di Dinas Komunikasi dan Informatika Kabupaten Ciamis masih mengalami permasalahan berupa over-provisioning perangkat dan Co-Channel Interference (CCI) akibat penempatan Access Point (AP) yang tidak optimal. Penelitian ini bertujuan untuk mengevaluasi kondisi jaringan yang ada serta merancang ulang infrastruktur WLAN agar lebih efisien dan optimal. Metode yang digunakan adalah PPDIOO (Prepare, Plan, Design, Implement, Operate, Optimize), dengan batasan hingga tahap Design. Proses penelitian diawali dengan analisis kondisi jaringan eksisting, dilanjutkan dengan perencanaan arsitektur berbasis controller-based WLAN, serta perancangan topologi jaringan yang terpusat menggunakan Wireless LAN Controller (WLC). Rancangan kemudian divalidasi melalui simulasi menggunakan Cisco Packet Tracer. Hasil penelitian menunjukkan bahwa desain jaringan yang diusulkan mampu mengurangi jumlah perangkat, meminimalisasi interferensi sinyal, serta meningkatkan stabilitas koneksi antar perangkat. Dengan demikian, redesain jaringan yang diusulkan dapat menjadi solusi untuk meningkatkan efisiensi dan kualitas layanan jaringan WLAN. The efficiency of wireless network infrastructure is an important aspect in supporting the operations of government agencies in the era of digital transformation. However, the condition of the WLAN network at the Communication and Informatics Office of Ciamis Regency still experiences problems in the form of device over-provisioning and Co-Channel Interference (CCI) due to suboptimal placement of Access Points (APs). This study aims to evaluate the condition of the existing network and redesign the WLAN infrastructure to be more efficient and optimal. The method used is PPDIOO (Prepare, Plan, Design, Implement, Operate, Optimize), with limitations up to the Design stage. The research process begins with an analysis of the existing network condition, followed by planning a controller-based WLAN architecture, and designing a centralized network topology using a Wireless LAN Controller (WLC). The design is then validated through simulations using Cisco Packet Tracer. The results of the study show that the proposed network design is able to reduce the number of devices, minimize signal interference, and increase the stability of connections between devices. Thus, the proposed network redesign can be a solution to improve the efficiency and quality of WLAN network services.  
Penilaian Kinerja Layanan TI SIPP Berdasarkan ITIL: Studi Kasus Pengadilan Negeri Tasikmalaya Nicken Syahira Anjani; Tiara Dwi Yogaputri; Rabbani Halim Natadireja; Muhammad Rabil Wahid; Helmy Dzulfikar
JUSIFOR : Jurnal Sistem Informasi dan Informatika Vol 5 No 1 (2026): JUSIFOR - Juni 2026
Publisher : Fakultas Sains Dan Teknologi, Universitas Raden Rahmat Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70609/jusifor.v5i1.8532

Abstract

This study evaluates the performance of the Information Technology services supporting the Case Tracking Information System (SIPP) at the Tasikmalaya District Court using the ITIL Service Operation framework. A qualitative interview-based approach was employed to assess incidents, service availability, and infrastructure conditions. The results show that SIPP still experiences recurring errors, system downtime, and synchronization issues, while incident handling remains reactive and undocumented. Escalation to national administrators is informal and lacks traceability, and infrastructure limitations further reduce system stability. Overall, the maturity level of IT services falls within the low-to-medium category, indicating the need for formal procedures, structured incident recording, and infrastructure improvements to enhance service reliability.
Pengembangan Jaringan Lokal SMAN 2 Singaparna Menggunakan Metode Network Development Life Cycle dan Manajemen Bandwidth Febri Gumelar; Delisa Jahro; Helmy Dzulfikar
Jurnal Nasional Komputasi dan Teknologi Informasi Vol. 9 No. 3 (2026): Juni, 2026
Publisher : Program Studi Teknik Komputer, Fakultas Teknik. Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/qfdn9f43

Abstract

Abstrak - Pelaksanaan Ujian Berbasis Komputer (Computer Based Test/CBT) di SMAN 2 Singaparna mengalami kendala berupa penumpukan lalu lintas data (delay tinggi) dan ketidakefisienan operasional akibat prosedur bongkar-pasang router secara fisik untuk mengisolasi jaringan siswa. Penelitian ini bertujuan untuk mengevaluasi dan mengembangkan infrastruktur jaringan lokal sekolah yang lebih permanen, aman, dan stabil. Metode penelitian yang digunakan adalah Network Development Life Cycle (NDLC) yang meliputi tahap analisis, perancangan, hingga protoype. Perancangan segmentasi logik menggunakan Virtual Local Area Network (VLAN) disimulasikan melalui Cisco Packet Tracer, sementara manajemen lalu lintas data dikonfigurasi pada perangkat router MikroTik. Hasil penelitian menunjukkan bahwa implementasi VLAN berhasil memisahkan broadcast domain antara siswa dan fasilitas guru. Selain itu, penerapan Simple Queue dan Firewall Filter Rules pada MikroTik mampu menjamin ketersediaan bandwidth ujian dan memblokir akses internet umum bagi siswa, sambil tetap mempertahankan koneksi lokal ke Server CBT. Pengembangan ini terbukti mampu mengeliminasi rutinitas isolasi fisik perangkat, meningkatkan proyeksi Quality of Service (QoS), serta menciptakan arsitektur jaringan yang efisien. Kata kunci : CBT; Firewall; Manajemen Bandwidth; NDLC; VLAN;   Abstract - The implementation of the Computer-Based Test (CBT) at SMAN 2 Singaparna encountered challenges such as data traffic congestion (high delay) and operational inefficiency due to the physical plugging and unplugging of routers to isolate the student network. This study aims to evaluate and develop a more permanent, secure, and stable local network infrastructure. The research methodology utilized is the Network Development Life Cycle (NDLC), covering the analysis, design, and prototyping phases. Logical segmentation using Virtual Local Area Network (VLAN) was simulated via Cisco Packet Tracer, while data traffic management was configured on a MikroTik Router. The results indicate that VLAN implementation successfully separated the broadcast domains between students and teachers. Furthermore, the application of Simple Queue and Firewall Filter Rules on MikroTik ensured bandwidth availability for exams and blocked general internet access for students, while maintaining local connections to the CBT Server. This development is proven to eliminate the routine of physical device isolation, improve the projected Quality of Service (QoS), and create an efficient network architecture Keywords: Bandwidth Management; CBT; Firewall; NDLC; VLAN;
Co-Authors Adilla Maulida Aripin Adinda Adzra Athiyyatsaqib Aditya Restu Fahreza Albia Fabiansyah Aldy Putra Aldya Aliefa Ayesha Adawiyah Amman Abdullah Rosyid Andri Ulus R Ardi Al ansori Dardha, Muhamad Yusa Delisa Jahro Dewi Puspita Sari Elsa Novia Safitri Erika Ramadhani Fadlilahadian Fakhri Saomi FATCKU ROCHMAN Fauzan Iffat Chairullah Febri Gumelar Ghani Rizki Ferrari HEGIRA MUSYAFA KARTIWAN Hifzhan Abdillah Rojabi - Hyuga Ramadhan Noer Ikhlas, Andri Nur Imam Budiansyah Insiroh Amaliana Isha Alfitriani Lauren Nugraha M.Aris Risnandar Maitsa Washfa Syahira Muhamad Ikhsan Tazudin Muhamad Rafly Affansyah Muhammad Hiraki Aufa Islamapasha Muhammad Nur Robbany Muhammad Rabil Wahid Muhammad Rehan Adriansyah Muhammad Rofik Aprizani Najwa Fadillah Najwa Syafa Syahidah Nala, Darrennala Sandeyamugni Nandhika Pratama Nicken Syahira Anjani Nurul Hiron Qori Naza Abdillah Rabbani Halim Natadireja Rafli Deas Eka Putra Ramadhan Bagus Hendrawan Ramadhani, Erika Rian Nurdiansyah Rifan Fauzi Rohandi Rifka Maulana Yusup, Mochamad Rifza Hamdalah Putra selly auliya Sendy Seftiawan Sindi Susanti Sisdarmanto Adinandra, Sisdarmanto Siti Fauziah Adawiyah Siti Julianti Syaefulloh Umar Sakhi Syahlaa A’aqilah Effendi Syahrul Rifat Firdaus Tiara Dwi Yogaputri Zahra Ramadhani Putri Zelda Azahra Putri