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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Journal of the Indonesian Mathematical Society Jurnal Keteknikan Pertanian Tropis dan Biosistem Conference SENATIK STT Adisutjipto Yogyakarta Pendas : Jurnah Ilmiah Pendidikan Dasar Jurnal Matematika UNAND KURVATEK International Journal of Electrical, Energy and Power System Engineering (IJEEPSE) Jurnal Teknologi dan Riset Terapan (JATRA) PRIMA : Portal Riset dan Inovasi Pengabdian Masyarakat Vortex Bestari: Jurnal Pendidikan dan Kebudayaan Informasi dan Promosi Kesehatan Jurnal Manajemen dan Teknologi Rekayasa Journal of Artificial Intelligence and Digital Business Jurnal Penelitian Ekonomi Manajemen dan Bisnis BULLET : Jurnal Multidisiplin Ilmu Abdimas Mandalika Journal of International Multidisciplinary Research LoroNG Wana Lstari Jurnal Pengabdian dan Inovasi Masyarakat
Riski Kurniawan
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Smoothed Particle Hydrodynamics for Heat Transfer in Plates: Analytical Validation and Geometric Effects of Internal Heat Sources Kurniawan, Riski
Journal of the Indonesian Mathematical Society Vol. 32 No. 2 (2026): JUNE
Publisher : IndoMS

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Accurate simulation of heat transfer is essential in many engineering applications. This study investigates heat transfer on thin plates by solving two-dimensional heat equations using the Smoothed Particle Hydrodynamics (SPH) method. The accuracy of the formulation is evaluated by comparing SPH results with analytical solutions for Dirichlet and Neumann boundary conditions, where small nRMSE values confirm good agreement. The method is then applied to plates with internal heat sources of different but equal-area geometries, showing that the star-shaped source yields the fastest heat transfer. These findings highlight the flexibility of SPH for modeling heat equations under complex geometries and boundary conditions.
Probabilistic Seismic Hazard Analysis Bali: Fokus pada Sumber Gempa Lokal dan Shallow Background Kurniawan, Riski; Dewi, Adistina Lailia Fajar; Setiahadiwibowo, Ajimas Pascaning
KURVATEK Vol 11 No 1 (2026): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v11i1.6532

Abstract

Penelitian ini mengevaluasi bahaya gempa di Pulau Bali dengan memperhitungkan sumber gempa lokal (fault) dan gempa dangkal (shallow background) menggunakan Probabilistic Seismic Hazard Analysis (PSHA). Nilai Peak Ground Acceleration (PGA) dari fault lokal untuk periode ulang 500 tahun berkisar 0,02–0,20 g dan untuk periode ulang 2500 tahun berkisar 0,05–0,30 g. Sementara itu, sumber gempa Shallow Background menghasilkan PGA 0,02–0,30 g untuk periode ulang 500 tahun dan 0,30–0,60 g untuk periode ulang 2500 tahun. Hasil analisis menunjukkan wilayah selatan Bali memiliki PGA tertinggi akibat kombinasi kedua sumber gempa, sedangkan wilayah tengah dan utara memiliki PGA menengah hingga rendah, tetapi tetap signifikan. Integrasi kedua sumber gempa menghasilkan peta hazard yang lebih representatif, mendukung mitigasi risiko, perencanaan tata ruang, dan desain bangunan tahan gempa.
Analisis Aktivitas Harian Rusa Sambar (Cervus unicolor) di Kandang Demplot Litbang Rusa BP2LHK Aek Nauli Kabupaten Simalungun Sumatera Utara Triastuti Triastuti; Riski Kurniawan; Tioner Purba
Wana Lestari Vol 8 No 1 (2026): Wana Lestari
Publisher : Program Studi Kehutanan, Fakultas Pertanian, Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35508/wl.v8i1.28877

Abstract

The sambar deer (Cervus unicolor) is a wild animal whose population continues to decline due to hunting and habitat degradation, making captive breeding an ex situ conservation effort. This study aims to analyze differences in daily activity of sambar deer during the day and night. Observations were conducted at the Deer Research and Development Demonstration Plot of the BP2LHK Aek Nauli, Simalungun Regency, using the Focal Animal Sampling (FAS) method. Observed activities included walking, resting, sleeping, eating, socializing, grooming, defecation, urination, nursing, and suckling. Data were analyzed using the Wilcoxon Signed-Rank test at a significance level of 5%. The results showed that walking and feeding activities were more prevalent during the day, while resting and sleeping activities increased at night. The Wilcoxon test showed that only urination activity was significantly different between day and night (p < 0.05), while other activities were not significantly different (p > 0.05). These results indicate that captive sambar deer retain their natural behavioral patterns and are able to adapt to environmental conditions. This can serve as a basis for captive management and support ex-situ conservation.
PENINGKATAN KETERAMPILAN MENULIS KONJUNGSI DENGAN MODEL PjBL BERBASIS PENDEKATAN TaRL MELALUI STORYBOARD DI KELAS IV SDN SUMURWELUT III/440 SURABAYA Syahla Muthia Eronisa; Putri Dyah Ayu Nur Evitasari; Risty Amaria Ayuningtyas; Rizki Chusnul Hidayah; Muhammad Alfan Khoirush Shidqi; Riski Kurniawan; Rarasaning Satianingsih; Ratnawati
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 02 Juni 2026 Press
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.50430

Abstract

This research is motivated by the low conjunction writing skills of fourth-grade students at SDN Sumurwelut III/440 Surabaya in the Indonesian Language subject. Based on initial observations, most students had not been able to use conjunctions correctly in sentences and paragraphs. This study aims to improve conjunction writing skills through the application of the Project Based Learning (PjBL) model based on the Teaching at the Right Level (TaRL) approach using storyboard media. This study is a Classroom Action Research (CAR) conducted in two cycles. Each cycle consists of four stages: planning, implementation, observation, and reflection. The subjects were 29 fourth-grade students divided into three ability levels based on the TaRL approach, with a Minimum Completion Criteria (KKM) of 75. The results show an improvement in conjunction writing skills. In Cycle I, the class average score reached 67.68 with a classical completion percentage of 42.9% (12 out of 28 students). In Cycle II, the class average score increased to 75.57 with a classical completion percentage of 67.9% (19 out of 28 students). This improvement occurred along with better implementation of the PjBL model with storyboard media that was more structured and contextual according to students' ability levels.
Co-Authors Afriandini, Nadia Agung Prakoso Agustina, Puti Akhmad Zamroni Al Huda, Luqman Antonius Rajagukguk Antonius Rajagukguk, Antonius Arif Pambekti Atmawati, Zuni Ayun, Qurrotu Budiono, Cyrilus Sukaca Darwin Warisi Denny Dermawan Dewi, Adistina Lailia Fajar Evan, Bah Farchan Mauluddin Faturohim, Yasin Fiqih, Alma Delia Audreya Gumelar, Awang Aji Haripamyu Haripamyu Inayati, Mahfida Jeffry Andhika Putra Kamal Fajri, Amrisal Kesuma, Pratama Lisandari , Yani Lukito, Indro Misi Okia, Yudha Mizan, Fathkul Muhammad Alfan Khoirush Shidqi Mumtazah, Lubna Musthofa Lutfi Mycelia Paradise Nazilah, Eka Rohmatun Pamungkas, Sunu Aditya Prasetyo, Rahmad Unggul Pratama, Yudha Agung Putri Dyah Ayu Nur Evitasari Rachmawaty M. Noer RATNAWATI Risty Amaria Ayuningtyas Rizki Chusnul Hidayah Rizqiyati, Zurni Safei, Luki Saputra, Muhammad Reza Satianingsih, Rarasaning Setiahadiwibowo, Ajimas Pascaning Setyo, Bima Candra Gautama Adi Soemarwoto, Wahyudi Suangga, Fitriany Syafwan, Mahdhivan Syahla Muthia Eronisa Syarifuddin, Wakhid Tioner Purba Tri Efendi, Erwan Triastuti Triastuti Utami, Rizki Sari Veriadi, Veriadi Wahyunanto Agung Nugroho Widianingsih, Devi Wulan Handayani, Wulan Zainuddin Syarif Zulfa, Fachria