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All Journal Jurnal Pendidikan Fisika Undiksha InSTEM Journal of Electronics and Instrumentation
I Wayan Windu Sara
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Agriculture, Biological Sciences & Forestry Chemistry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mathematics Physics Other

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KALKULASI NUMERIK RAPAT KEADAAN WS2 MONOLAYER DENGAN PENDEKATAN IKATAN KUAT MENGGUNAKAN METODE PERAMBATAN WAKTU I Wayan Windu Sara
Jurnal Pendidikan Fisika Undiksha Vol. 14 No. 3 (2024)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jjpf.v14i3.86266

Abstract

Abstrak Tungsten Disulfida merupakan salah satu varian Transition Metal Dichalcogenide yang memiliki potensi besar untuk diaplikasikan pada berbagai teknologi seperti sel surya, transistor, dan optoelektronika lainnya. Dalam penelitian ini dikaji rapat keadaan Tungsten Disulfida monolayer dalam keadaan murni maupun dengan variasi vakansi atom penyusunnya. Penelitian ini dilakukan secara komputasi menggunakan metode perambatan waktu dengan pustaka TBPLaS. Kalkulasi dalam penelitian ini dapat berjalan dengan baik pada komputer personal dan waktu yang diperlukan bersifat linier terhadap peningkatan ukuran sistem yang dikaji. Diperoleh bahwa Tungsten Disulfida monolayer dalam keadaan murni memiliki sifat semikonduktor dengan celah pita energi yang bernilai sekitar 1,7 eV. Sementara itu, Tungsten Disulfida monolayer dengan variasi konsentrasi atom-atom penyusunnya dari 1 - 5% menunjukkan sifat semikonduktor tipe N, tipe P dan terkompensasi. Kata kunci: Tungsten Disulfida monolayer , Ikatan Kuat, Metode Perambatan Waktu, Rapat Keadaan, Vakansi Abstract Tungsten Disulfide is one of the Transition Metal Dichalcogenides with significant potential for applications in various technologies, such as solar cells, transistors, and other optoelectronic devices. This study examines the density of states of monolayer Tungsten Disulfide in its pure state and with variations in its atomic vacancies. The computational research used the time propagation method with the TBPLaS library. Calculations were performed efficiently on a personal computer, with computation time increasing linearly with the system size. The results show that pure monolayer Tungsten Disulfide exhibits semiconductor properties with an energy band gap of approximately 1.7 eV. In contrast, monolayer Tungsten Disulfide with varying atomic vacancy concentrations from 1% to 5% displays characteristics of N-type, P-type, and compensated semiconductors. Keywords : Tungsten Disulfide monolayer, Tight-Binding, Time Propagation Method, Density of States, Vacancy
Pengembangan Program Komputer untuk Analisis Reflektansi, Transmitansi, dan Absorptansi pada Cermin Optik I Wayan Windu Sara
Journal of Electronics and Instrumentation Vol. 2 No. 3 (2025)
Publisher : Jurusan Fisika, FMIPA Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jei.v2i3.60079

Abstract

Cermin optik banyak digunakan dalam berbagai aplikasi instrumentasi optik. Namun, biaya pengadaan dan operasional alat untuk karakterisasi cermin optik relatif mahal. Pada penelitian ini dikembangkan dan diuji program komputer portabel berbasis Graphical User Interface (GUI) sebagai alternatif rendah biaya yang dapat digunakan untuk menganalisis karakteristik cermin optik, meliputi reflektansi, transmitansi, dan absorptansi dari gelombang elektromagnetik terpolarisasi-s, terpolarisasi-p, serta tidak terpolarisasi. Program komputer pada penelitian ini berhasil digunakan untuk mengkarakterisasi secara komputasi desain cermin optik berbasis aluminium dan perak. Hasil yang diperoleh sesuai literatur di mana cermin optik berbasis perak cenderung memiliki reflektansi yang lebih tinggi (~90%) dibandingkan cermin berbasis aluminium (~86%). Penelitian ini menunjukkan bahwa program komputer yang telah dikembangkan dapat digunakan dalam penelitian dan pengajaran terkait cermin optik
The Scientific Aspects of the Balinese Wariga Calendar I Made Tirta; I Wayan Windu Sara; Anak Agung Istri Ratnadewi
Jurnal Inovasi Sains dan Teknologi Untuk Masyarakat Vol. 4 No. 1 (2026): Mei
Publisher : Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/instem.v4i1.60005

Abstract

The Balinese Calendar, known as the Wariga Calendar, played a significant role in the religious and cultural life of Hindus, particularly in Bali. It was commonly found in Balinese Hindu households and remained an important reference for Balinese Hindus living outside the island. The Wariga Calendar represented a unique integration of Hindu philosophical values with scientific and mathematical calculations. One of its primary functions was determining the cycles of Hindu holy days and major festivals, including Saraswati, Pagerwesi, Galungan, and Kuningan. The introduction of the Wariga Calendar, especially its scientific and mathematical aspects, was considered important for Hindu Religious Education teachers throughout Indonesia. First, the holy days calculated using the Wariga Calendar had been celebrated by Hindu communities across the Indonesian archipelago, not only by the Balinese ethnic community. Second, only a limited number of Hindu Religious Education teachers outside Bali understood the mathematical principles underlying the calendar system. An introduction to the Wariga Calendar was delivered during a National Technical Guidance Program (Bimbingan Teknis) for Hindu Religious Education teachers held in a hybrid format on 2–3 August 2025. The program involved participants from various regions of Indonesia. The results showed that most participants considered the knowledge valuable for improving their understanding of the cyclical nature of Hindu holy days. Furthermore, many participants recognized that several elements of the Wariga Calendar exhibited mathematical patterns that were closely aligned with the philosophical messages embedded in the calendar, particularly those associated with the Galungan festival.
Co-Authors Anak Agung Istri Ratnadewi I Made Tirta