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All Journal NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Journal of Energy and Electrical Engineering (JEEE) Jurnal Nusantara Mengabdi Jurnal Teknologi Riset Terapan
Melvi, Melvi
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Humanities Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences Other

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PEMANFAATAN METODE WAVELET PADA ROBOT SEPAKBOLA BERBASIS MACHINE LEARNING GOOGLE TENSORFLOW Aryanto, Aryanto; Melvi, Melvi
Journal of Energy and Electrical Engineering Vol 1, No 2: APRIL 2020
Publisher : Teknik Elektro Universitas Siliwangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (343.16 KB) | DOI: 10.37058/jeee.v1i2.1552

Abstract

Humanoid Football robot that will be investigated is a wheeled model developed with the ability to predict or prediction in a football field with high accuracy and image resolution. This robot is expected to be able to keep the goal for up to 25 minutes with a cruising reach of 100 m. Also, the robot can monitor or monitor the desired area so that it can keep the goal from attacks from the opposing robot. This robot is expected to complete prediction missions towards the ball and autonomous monitoring without being controlled by the pilot. Robot control is carried out by a Ground Control Station (GCS) computer. The goalkeeper's robot process uses Google TensorFlow's machine learning technology that is integrated with the wavelet method to enable this robot to keep the goalposts from the area effectively and efficiently. Keywords: robot, machine learning, prediction, Ground Control Station, wavelet method
Pengembangan Canti sebagai Desa Wisata Pesisir Tangguh Bencana Berbasis pada Kearifan Lokal Melvi, Melvi; Muda, Mona Arif; Akbar, Yusuf Rizki Sulardi; Wahidy, Yusril; Ulvan, Ardian
Jurnal Nusantara Mengabdi Vol. 4 No. 1 (2024): Oktober
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jnm.v4i1.3840

Abstract

Purpose: This initiative aims to transform Canti Village into a disaster-resilient coastal tourism destination by leveraging its unique local wisdom, culture, and natural resources. The objective was to empower the community, revitalize local businesses, and position Canti Village as a thriving tourism hub. Methodology: The initiative employed a participatory approach, engaging the village government, local stakeholders, and community members through workshops, focus-group discussions, and hands-on training. Key activities included assessing the village’s natural, maritime, and historical attractions; identifying dormant businesses; and providing capacity-building sessions on entrepreneurship, disaster resilience, and technology integration. Results: The initiative achieved significant milestones, including the revitalization of dormant businesses, enhancement of community knowledge on disaster resilience, and introduction of technology to existing entrepreneurs. The program also helped to position Canti Village as a potential tourism hub by developing value-added products and services. Furthermore, community members exhibited an increased readiness to serve as tourism actors, demonstrating a commitment to promoting the village’s cultural and natural heritage. Limitations: The primary challenges include limited financial resources and the need for ongoing technical support to sustain the initiative's outcomes. Additionally, infrastructural constraints and the limited digital literacy of some community members pose hurdles in achieving broader technological integration. Contributions: This initiative contributes to regional development by fostering disaster-resilient and sustainable tourism. It also serves as a model for integrating local wisdom into tourism development, promoting cultural preservation, and enhancing economic opportunities in rural communities.
Analisis Kapasitas Short Message Service (SMS) dan Probability Packet Loss pada Sistem Peringatan Dini Nirkabel di Tangki Fluida Melvi, Melvi; Ulvan, Ardian; Aditama, Aris; Batubara, Mona Arif Muda
Jurnal Teknologi Riset Terapan Vol. 1 No. 1 (2023): Januari
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v1i1.1789

Abstract

Purpose: In this research a wireless early warning system is designed and examines how to overcome communication errors or delays in information received by operators by analyzing traffic and Blocking Probability SMS (Short Massege Service) in wireless early warning systems on fluid tanks. Methodology: System testing uses the FC 37 sensor as a fluid sensor (which includes electrolytes or can conduct electric current). Results: This early warning system works well and works at a droplet volume of ± 0.5 ml. Based on the calculation of SMS Blocking Probability based on the increasing number of SMS subscribers, the Blocking Probability also increases. For the number of SMS 8448 subscribers the Blocking Probability SMS is 0.0093% and for the number of SMS 11520 subscribers the Blocking Probability SMS is 0.1719%. The Probability of Packet Loss is influenced by the Probability of BER. Probability BER calculation using the modulation used, namely 16-QAM (with a code rate of ½ and ¾) and 64-QAM (with a code rate of 2/3 and ¾) is influenced by the distance of the UE to the BTS. This distance has an effect because the BER Probability calculation uses the Walfish-Ikegami propagation model to calculate Pathloss. At a distance of UE and BTS 0.2 km Probability Packet Loss using 16-QAM ½ 2.55 x 10-14 modulation, 16-QAM ¾ 1.14 x 10-14 modulation, 64-QAM 2/3 3.05 x 10 modulation -9, and 64-QAM ¾ 2.94 x 10-9. The 16-QAM Packet Loss value is smaller than the 64-QAM because the bit values used are different, 16-QAM uses 4 bits while 64-QAM uses 6 bits.
Unjuk Kerja Teknologi Akses Jamak TD-CDMA dan TD-SCDMA pada Infrastruktur Jaringan High Altitude Platform Stations Melvi, Melvi; Nurhayati, Nurhayati; Batubara, Mona Arif Muda; Septama, Hery Dian; Ulvan, Ardian
Jurnal Teknologi Riset Terapan Vol. 3 No. 1 (2025): Januari
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v3i1.1790

Abstract

Purpose: This study evaluates the performance of TD-CDMA and TD-SCDMA access technologies for High Altitude Platform Stations (HAPS) to meet growing demands for high-speed access and larger bandwidth in telecommunications. Methodology/approach: A performance comparison was conducted between TD-CDMA and TD-SCDMA based on three key parameters: access speed, data transfer capacity, and power consumption levels. Analytical calculations were carried out to assess data capacity and transmitted power at varying distances from the HAPS. Results/findings: The analysis showed that TD-CDMA provides higher data capacity compared to TD-SCDMA. Additionally, transmitted power requirements increase with greater distances between HAPS and ground receivers, with a maximum transmitted power of 19.423 W observed at 50,000 meters. Conclutions: TD-CDMA offers better overall performance than TD-SCDMA for HAPS applications, providing higher data capacity while maintaining comparable power efficiency, making it a preferable choice for high-speed communication services. Limitations: The study is limited to theoretical calculations without real-world field testing. Factors such as environmental interference and atmospheric conditions were not included in the analysis. Contribution: This research provides insights into selecting efficient access methods for HAPS technology, highlighting TD-CDMA as the more suitable option to support high-speed, large-bandwidth telecommunication services with optimized resource utilization.
Rancang Bangun Sistem Monitoring Ketinggian Muka Air Laut Menggunakan Arduino Pro Mini dan NodeMCU ESP8266 Melvi, Melvi; Ulvan, Ardian; Sidiq, Muhamad Rijal; Batubara, Mona Arif Muda
Jurnal Teknologi Riset Terapan Vol. 1 No. 1 (2023): Januari
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v1i1.1794

Abstract

Purpose: This study aims to develop and implement a real-time sea water level monitoring system to anticipate high wave hazards, particularly in coastal areas such as Ketapang Pier, Pesawaran Regency, Lampung Province. Research methodology: The system utilizes an IoT-based approach involving an SRF04 ultrasonic sensor for water surface measurement, an Arduino Pro Mini for data processing, a NodeMCU ESP8266 for server connectivity, a DS3231 RTC for time accuracy, and a microSD card module for offline data storage. The system is powered using a 12V adapter regulated through an LM2596 module. Results: Field testing demonstrated that the system accurately records water level distances with an average relative difference of 0.205% between Blynk App and SD Card outputs. The system classifies water levels into two status categories: normal and hazard. Conclusions: The implemented monitoring instrument functions reliably in real-time conditions and offers accurate water level readings, making it suitable for coastal hazard early warning systems. Limitations: The system is dependent on continuous power and stable internet connectivity; thus, functionality may be affected in remote or offline environments. Contribution: This research provides an affordable and accurate IoT-based water level monitoring solution that can be replicated in other coastal areas for disaster risk reduction and environmental monitoring.
Perancangan Antena Helix Frekuensi 433 MHz Pita Lebar Melvi, Melvi; Lestari, Fitri; Ulvan, Ardian; Aryanto, Aryanto; Batubara, Mona Arif Muda
Jurnal Teknologi Riset Terapan Vol. 1 No. 2 (2023): Juli
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v1i2.2399

Abstract

Purpose: This research focuses on the design and analysis of a helix antenna operating at 433 MHz with a 4 MHz bandwidth. This study aims to investigate the antenna's performance and functionality with a focus on reception capabilities. Methodology: The research was conducted in two stages. First, the helix antenna was simulated based on predetermined parameters. The simulation process produced values such as return loss, VSWR, impedance, and gain. Afterward, the antenna was fabricated and tested using a Vector Network Analyzer (6000A) to verify the simulated values. The key measured parameters included return loss (-19.8866 dB), VSWR (1.22547), and impedance (46.5695 Ohms). A 1000 mW telemetry radio module was used as the transmission source during field testing. Results: The helix antenna showed a directional radiation pattern with a simulated gain of 9.231 dB. Field testing confirmed the antenna's functionality as a receiver, achieving a maximum transmission distance of 2.6 km. Signal strength was measured using the Received Signal Strength Indicator (RSSI). However, the data quality was not optimal due to environmental obstructions. Conclusion: There was minimal shift between simulated and measured parameters. However, the antenna's real-world performance was affected by interference and non-ideal outdoor conditions. Limitations: Testing was conducted in areas with suboptimal line-of-sight conditions, which impacted signal strength and introduced interference. Contribution: This study enhances the understanding of helix antennas for receiver applications at 433 MHz and provides valuable insights into performance under practical conditions.
Analisis Rancangan Antena Telemetri Jenis Dipole pada Unmanned Aerial Vehicle (UAV) Melvi, Melvi; Shevia, Chiko Ayunindya; Yuniati, Yetti; Batubara, Mona Arif Muda; Ulvan, Ardian; Aryanto, Aryanto
Jurnal Teknologi Riset Terapan Vol. 1 No. 2 (2023): Juli
Publisher : Penerbit Goodwood

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35912/jatra.v1i2.2404

Abstract

Purpose: This study focuses on the design and evaluation of dipole antennas for Unmanned Aerial Vehicles (UAVs) operating at a frequency of 433 MHz. The aim is to develop small and lightweight antennas that do not compromise the aerodynamic characteristics of UAVs, ensuring effective communication between the UAV and the Ground Control Station (GCS). Methodology: The research employed CST software to design and simulate dipole antennas using various materials, including copper, gold, silver, aluminum, and iron. The simulation parameters were analyzed in terms of Voltage Standing Wave Ratio (VSWR) values and return loss. Results: The simulation results revealed that the silver antenna material exhibited the best performance, with a VSWR value of 1.3191 and a return loss of -17.222 dB. However, during the fabrication stage, copper was chosen for the antennas, which yielded a VSWR measurement result of 1.427 and a return loss value of -15.09 dB. Subsequent testing of the dipole antenna's communication distance, when placed on a UAV, resulted in a Received Signal Strength Indicator (RSSI) value of -70.68 dBm. This indicated that the antenna maintained a signal quality of 96% at a distance of 2.5 km. Limitation: One limitation of this study is that it primarily focuses on simulations and testing at a specific frequency (433 MHz) and material selection (copper for fabrication). The results may not be directly applicable to different frequencies or materials used in UAV antennas. Additionally, real-world conditions, such as environmental interference, could affect the performance of the antennas. Contribution:This research contributes to the development of efficient and lightweight dipole antennas for UAVs, ensuring reliable communication with GCS. The findings, particularly the choice of copper for fabrication, provide valuable insights for improving UAV communication systems without compromising flight performance.
PELESTARIAN HUTAN MANGROVE DAERAH PESISIR DALAM UPAYA ANTISIPASI PERUBAHAN IKLIM Aryanto, Aryanto; Mirda, Irfan; Melvi, Melvi; Ulvan, Ardian
NUSANTARA : Jurnal Ilmu Pengetahuan Sosial Vol 11, No 3 (2024): NUSANTARA : Jurnal Ilmu Pengetahuan Sosial
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jips.v11i3.2024.882-890

Abstract

Desa Gebang di Kecamatan Teluk Pandan, Kabupaten Pesawaran, Lampung, dikenal dengan sabuk hijau hutan mangrovenya yang membentang di pesisir. Hasil survei menunjukkan kawasan ini berpotensi sebagai pusat edukasi, penelitian, dan ekowisata. Jika dikelola dengan baik, Gebang bisa menjadi Kampung Iklim, tempat masyarakat beradaptasi dan mitigasi perubahan iklim, sekaligus meningkatkan perekonomian dan kesejahteraan. Dalam pengabdian, tim dosen dan mahasiswa telah menanam 500 bibit mangrove, bekerjasama dengan kelompok pelestari mangrove Petengoran untuk konservasi. Perangkat pengukur permukaan air laut dan iklim mikro juga dipasang. Pemetaan menggunakan fixed wing menunjukkan luasan hutan mangrove Gebang sebesar 267,6 Ha. Selain itu, tim memasang ATS/AMF, otomatis menggantikan suplai listrik dari PLN ke Genset saat diperlukan. Pengembangan ini menegaskan potensi Desa Gebang sebagai model adaptasi dan mitigasi perubahan iklim, sambil mempromosikan keberlanjutan.
Co-Authors Aditama, Aris Akbar, Yusuf Rizki Sulardi Ardian Ulvan Aryanto Aryanto Fitri Lestari, Fitri Hery Dian Septama Mirda, Irfan Mona Arif Muda Batubara Muda, Mona Arif Nurhayati Nurhayati Shevia, Chiko Ayunindya Sidiq, Muhamad Rijal Wahidy, Yusril Yetti Yuniati