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Nyoman Gunantara
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gunantara@unud.ac.id
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Program Studi Teknik Elektro Fakultas Teknik, Universitas Udayana Jl. Kampus Bukit Jimbaran
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Bali
INDONESIA
Jurnal SPEKTRUM
Published by Universitas Udayana
ISSN : 23023163     EISSN : 26849186     DOI : https://doi.org/10.24843/SPEKTRUM
Core Subject : Science, Engineering,
Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal SPEKTRUM is peer review journal, published four times a year by the Department of Electrical Engineering, Faculty of Engineering, Universitas Udayana. This journal discusses the scientific works containing results of research in the field of electrical, include: power systems, telecommunications, computers, informatics, controls, and electronics. Authors are expected to include original scientific papers in accordance with the scope of the discussion of this journal including all aspects of the theory and practice are used.
Arjuna Subject : Teknik (semua kategori) - Teknik Listrik dan Elektro
Articles 5 Documents
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Search results for , issue "Vol. 12 No. 4 (2025): Jurnal SPEKTRUM" : 5 Documents clear
EVALUASI KUALITAS TEKNIS SISTEM INFORMASI ADMINISTRASI COASS MENGGUNAKAN GOOGLE LIGHTHOUSE Made Dhyo Pradnyadiva; Ngurah Indra ER; Fajar Purnama; Komang Sri Utami; I Wayan Shandyasa
Jurnal SPEKTRUM Vol. 12 No. 4 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Abstract

The successful adoption of an information system is highly dependent on its technical quality, including performance, accessibility, adherence to Best Practices, and SEO compliance. This study aims to evaluate the technical quality of a web-based information system for Coass (clinical internship) administration using Google Lighthouse. The audit was conducted on three key user interfaces: the Admin, Doctor, and Student Dashboards. The evaluation focused on four main categories: Performance, Accessibility, Best Practices, and SEO. The results demonstrated outstanding scores across all tested pages, with Performance scoring between 99–100, Accessibility at 95–96, and perfect scores (100) in both Best Practices and SEO. These results confirm that the system exhibits a high level of technical quality and aligns with modern web development standards. The findings indicate that the system delivers not only functional capabilities but also speed, reliability, and a highly optimized user experience.
PENERAPAN TEKNOLOGI TEPAT GUNAALAT SIRAT (SPLIT DAN IRAT) SEBAGAI UPAYA PEMERDAYAAN PENGRAJIN BAMBU DI DESA KAYUBIHI I G N Arya Bayu Kartika; D N Agung Nareswara Natha; I Kadek Deni Saputra; Gusti Ngurah Janardana
Jurnal SPEKTRUM Vol. 12 No. 4 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Abstract

Kayubihi Village, Bangli District, Bali, has great potential in the bamboo craft industry because 15% of its population works as craftsmen. However, limited traditional tools lead to low productivity and low quality results. This study aims to analyze the effectiveness of the use of the SIRAT (Split and Irat) tool in increasing the efficiency and productivity of craftsmen. The research method used is descriptive quantitative through structured observation and questionnaires. The results showed that the SIRAT tool can reduce processing time, from 35 seconds to 2 seconds in the split process, and from 73 seconds to 50 seconds in the irat process. Average split production increased from 0.57–1.42 stems per day to 1.85–3.42 stems, while irat production increased from 50.29–125.71 stems to 163.43–301.71 stems per day, or equivalent to an increase of 130%–225%. In addition, this tool produces more uniform bamboo sizes, reduces labor load, and reduces the risk of work accidents. Thus, the application of the SIRAT tool has proven effective in increasing productivity and quality of results, while also supporting Kayubihi Village as a bamboo craft center.
PERANCANGAN SPKLU SEPEDA MOTOR LISTRIK DAN PEMILIHAN LOKASI PEMASANGAN DI BALI SELATAN N. M. G. A. Krisnayani; I N. S. Kumara; I N. Setiawan; W. G Ariastina; I W. Sukerayasa; I. A. D. Giriantari; D. A. S. Santiari
Jurnal SPEKTRUM Vol. 12 No. 4 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Abstract

Indonesia is currently in a transition toward clean energy. Therefore, accelerating the adoption of Electric Vehicles (EVs) as a replacement for fossil-fueled vehicles has become a strategic step that is being actively promoted. To support this, the availability of adequate infrastructure is a key factor, with charging stations serving as the main infrastructure for electric vehicles. For optimal operation, the development of charging stations requires proper location selection and design. This study focuses on the design and location selection of Public Electric Vehicle Charging Stations (SPKLU) intended for electric motorcycles in the South Bali region. The design features a three-dimensional model of the charging station, along with its corresponding electrical plan. Meanwhile, location selection is carried out using the Analytical Hierarchy Process (AHP) method by evaluating potential sites. The outcome of this study is the identification of the best location for installing the SPKLU, accompanied by design suited to the site’s characteristics and the SPKLU’s electrical design. It is expected that this work can serve as a study and reference for further development to accelerate the adoption of electric vehicles in Bali.
PERANCANGAN DIRECT CHARGING SEPEDA MOTOR LISTRIK DAN PEMILIHAN LOKASI PEMASANGAN DI BALI SELATAN I N. A. P. Putra; I W. Sukerayasa; W. G Ariastina; I N. S. Kumara; I N. Setiawan; I. A. D. Giriantari; D. A. S. Santiari
Jurnal SPEKTRUM Vol. 12 No. 4 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Abstract

Bali is one of the regions in Indonesia at the forefront of the transition toward clean energy. One of the key steps to achieving this goal is the shift to electric vehicles (EVs). Therefore, the design of electric vehicle charging stations is a crucial factor in ensuring a smooth transition. Charging stations must be strategically located to provide easy access for users, and their planning must comply with existing regulations. One type of charging station is the Public Electric Vehicle Charging Station (SPKLU). However, most SPKLUs are focused on electric cars, whereas the use of electric motorcycles is far more widespread. For this reason, this study focuses on the design of a direct charging system for electric motorcycles, which can be connected directly to the vehicles. The design process includes both 3D modeling and the electrical layout. The selection of a suitable location will be carried out using the Analytic Hierarchy Process (AHP) to determine the optimal site in the South Bali area
ANALISIS KINERJA KODE BOSE CHAUDHURI HOCQUENGHEM PADA DIRECT SEQUENCE SPREAD SPECTRUM PADA KANAL FREKUENSI SELECTIVE FADING Wahyu Sahputra; Nyoman Pramaita; Nyoman Gunantara
Jurnal SPEKTRUM Vol. 12 No. 4 (2025): Jurnal SPEKTRUM
Publisher : Program Studi Teknik Elektro UNUD

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Abstract

This study aims to analyze the performance of Bose Chaudhuri–Hocquenghem (BCH) coding (7,4) in a Direct Sequence Spread Spectrum (DSSS) system using Pseudo Noise (PN) spreading code, under frequency selective fading and white Gaussian noise (AWGN) channel conditions. Simulations were performed using MATLAB Simulink to compare the system performance against Bit Error Rate (BER) at various values of bit energy to noise power density (Eb/No). The simulation results show that the use of BCH generally improves system performance by significantly reducing the BER value. At high Eb/No, the performance of PN + BCH is slightly better. This indicates that the effectiveness of signal coding and spreading is strongly influenced by channel conditions and noise levels. Code length, spreading type, and error correction method play an important role in optimizing digital communication performance.

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