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All Journal POSITRON PRISMA FISIKA Equator Journal of Management and Entrepreneurship Coding: Jurnal Komputer dan Aplikasi Jurnal Fisika Unand Jurnal Geosaintek Jurnal Fisika FLUX Jurnal Geocelebes Jurnal Geomine Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Martabe : Jurnal Pengabdian Kepada Masyarakat Jurnal Surya Masyarakat JURTEKSI Jurnal Ilmu Fisika Jurnal Kumparan Fisika Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Jurnal Surya Masyarakat Jurnal PkM (Pengabdian kepada Masyarakat) Jurnal Riset Fisika Indonesia Jurnal Geosaintek JuTISI (Jurnal Teknik Informatika dan Sistem Informasi)
Yudha Arman
Jurusan Fisika, Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Tanjungpura
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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Identifikasi Tumor Otak Menggunakan Convolutional Neural Network Arsitektur NasNetMobile Dengan Optimasi Wiener Filter Tiofi, Timothi; Arman, Yudha; Hasanuddin, Hasanuddin
PRISMA FISIKA Vol 13, No 3 (2025): PRISMA FISIKA, Vol. 13, No. 03 (2025)
Publisher : FMIPA, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/pf.v13i3.77722

Abstract

Telah dilakukan identifikasi keberadaan tumor otak pada citra Magnetic resonance imaging (MRI) menggunakan metode convolutional neural network (CNN). Proses identifikasi dimulai dari preprocessing citra, yang dilanjutkan dengan CNN arsitektur NasNetMobile. Pada tahap preprocessing, citra dipotong dan disesuaikan ukurannya agar seragam. Proses grayscaling citra kemudian dilakukan sebagai masukan bagi proses ekualisasi histogram. Noise pada citra hasil ekualisasi direduksi menggunakan metode wiener filter dengan nilai K 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, dan 1. Deteksi tepi menggunakan operator sobel dilakukan pada citra biner yang telah difilter tersebut. Citra hasil pengolahan kemudian digunakan pada proses Identifikasi tumor otak menggunakan CNN arsitektur NasNetMobile. Hasil penelitian menunjukan bahwa akurasi tertinggi (95,6%) diperoleh pada model dengan nilai K = 0.4. Tahap preprocessing citra sangat menentukan keakuratan proses identifikasi.
Eksplorasi Endapan Bauksit Menggunakan Metode Polarisasi Terimbas dan Resistivitas di Desa Sebemban, Kalimantan Barat Handika; Arman, Yudha; Muhardi, Muhardi
Jurnal Riset Fisika Indonesia Vol 6 No 01: Desember 2025
Publisher : Jurusan Fisika, Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/jrfi.v6i01.5600

Abstract

Tayan Hilir District, West Kalimantan Province, Indonesia, is characterized by the presence of economically valuable mineral resources, particularly bauxite deposits. This study aims to delineate the distribution of bauxite deposits in Sebemban Village, Tayan Hilir District, using integrated geophysical approaches. The investigation employed the induced polarization (IP) and electrical resistivity methods with a dipole–dipole electrode configuration. Resistivity and chargeability measurements were conducted along three survey lines, each 156 m in length with an electrode spacing of 4 m. The results show that the resistivity values range from 45.36 to 367.177 Ω·m, while the chargeability values vary between 16.9 and 878.80 ms. The subsurface stratigraphy of the study area comprises latosol, bauxite, saprolite, and bedrock units, including granodiorite and quartz diorite. Bauxite mineralization was identified at shallow depths, commencing at approximately 0.6 m below the ground surface. These results indicate that the combined application of resistivity and induced polarization methods is effective for identifying and characterizing near-surface bauxite deposits in the study area.
Studi Dinamika Molekular Gas Karbon Dioksida dalam struktur es XVII Yudha Arman; Artedi; Hasanuddin
Jurnal Penelitian Pendidikan IPA Vol 11 No 1 (2025): January
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i1.8336

Abstract

We conducted a molecular dynamics study on CO2 hydrate within the ice XVII structure to examine the molecular diffusion of CO2 molecules, as it is essential to the hydrate potential as a carbon capture. The simulated CO2 hydrate system used 324 water molecules and 90 CO2 molecules. We used the TIP4P/Ice model for water molecules, and the CO2 molecules were treated as united atom. The simulations were carried out at 273,15 K under various pressures of 200 MPa, 500 MPa, and 1000 MPa for 1,50 ns, with a step size of 1 fs. The results showed that the CO2 molecules were confined and freely moved inside the cage-like chiral tube along the c-axis of the ice XVII structure. No significant inter-cage hopping was observed during the evolution of all simulated systems. The diffusion coefficient values for CO2 molecules within the ice XVII structure were 5.03 × 10-8 cm2s-1, 2.45 × 10-8 cm2s-1, and 8.86 × 10-8 cm2s-1  for the respective pressure variations of 200 MPa, 500 MPa, and 1000 MPa, resulting in an inverse proportional with the system's pressure. A higher diffusion coefficient facilitates a faster the mass transfer and adsorption rate of CO2 in formation build up of the CO2 hydrate system.
PENINGKATAN KAPASITAS GURU SEKOLAH MENENGAH ATAS KABUPATEN BENGKAYANG DALAM MENGHASILKAN KARYA ILMIAH Ibnur Rusi; Renny Puspita Sari; Gusrizal Gusrizal; Evi Noviani; Elvi Rusmiyanto; Yudha Arman; Cucu Suhery
Martabe : Jurnal Pengabdian Kepada Masyarakat Vol 6, No 8 (2023): Martabe : Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Muhammadiyah Tapanuli Selatan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31604/jpm.v6i8.3049-3056

Abstract

Kompetensi guru merupakan keandalan yang harus dimiliki oleh seorang guru untuk mengatasi permasalahan yang dihadapi dan memenuhi apa yang menjadi kebutuhannya. Peningkatan kompetensi wajib dilakukan oleh seorang guru sehingga guru dapat beradaptasi dengan perubahan yang ada, baik perubahan peraturan, teknologi, maupun kondisi sosial, selain itu karena mengingat peran guru yang menjadi agent of change. Salah satu peningkatan kompetensi yang harus dipenuhi oleh seorang guru adalah pengembangan diri dalam membuat karya tulis ilmiah yang bersumber dari penelitian, dan kemudian dipublikasikan sehingga dapat memberikan manfaat. Banyak manfaat yang dapat diterima oleh seorang guru atas publikasi yang dibuat seperti keberlanjutan profesi guru dalam jenjang karir, sebagai inspirasi bagi guru-guru lain dan contoh baik bagi peserta didik. Pengabdian Kepada Masyarakat (PKM) Fakultas Matematika dan Ilmu Pengetahuan Alam (FMIPA) Universitas Tanjungpura dilakukan untuk memberikan insight positif dan tambahan pengetahuan bagi guru-guru SMA di Kabupaten Bengkayang, Kalimantan Barat. PKM yang dilakukan bertujuan untuk meningkatkan kapasitas guru dalam menghasilkan karya ilmiah yang sebelumnya menjadi kendala bagi sekelompok guru tingkat SMA di Kabupaten Bengkayang. Terdapat tiga sesi dalam PKM ini pertama yaitu penyampaian materi tentang teknik penelusuran literatur, kedua teknik penulisan sitasi dan daftar pustaka, dan terakhir teknik mengindari plagiasi. Secara keseluruhan PKM yang dilakukan oleh FMIPA Universitas Tanjungpura berjalan dengan lancar, dibuktikan dengan antusiasme peserta PKM melalui tanya jawab dan menghadiri kegiatan PKM secara sempurna.
Peningkatan Kompetensi Guru dalam Melaksanakan Praktikum Fisika pada Pembelajaran Jarak Jauh melalui Pelatihan Perangkat Analisis Video Bintoro Siswo Nugroho; Zulfian Zulfian; Yudha Arman; Asifa Asri; Dwiria Wahyuni
Jurnal Surya Masyarakat Vol 6, No 1 (2023): November 2023
Publisher : Universitas Muhammadiyah Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26714/jsm.6.1.2023.42-50

Abstract

The pandemic of COVID-19 has triggered awareness of the significant role of distance learning systems. Implementing science experiments, involving observation and measurement, requires more complex steps when conducted remotely online. An innovative method that can be used to address this issue is the combination of experimental demonstrations and video analysis. This article reports a training activity for the design and implementation of physics experiments using the video analysis software, Tracker, to improve the competence of physics teachers in conducting experiments through distance learning systems. The training was conducted through tutorials, demonstrations, practice sessions, work instructions, and online discussions. The impact of the training was measured by evaluating pre- and post-training questionnaires. The results indicate that the training can enhance participants' insights and competencies. This training provides an alternative solution for conducting laboratory experiments during face-to-face learning activity restrictions.
Exploring TiO2-PP as a Reusable Floating Photocatalyst for Humic Acid and Iron Removal in Peat Water Nugroho, Bintoro Siswo; Asri, Asifa; Arman, Yudha
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 13, No 2 (2023): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v13i2.60342

Abstract

In this study, we fabricate TiO2-PP catalyst and analyze its use for peat water photodegradation. The photocatalyst is a thin layer of TiO2 deposited on the surface of polypropylene (PP) grains by the thermal milling method. Scanning electron microscopy (SEM) and energy-dispersive x-ray spectroscopy (EDS) images indicate that the fabrication successfully deposited TiO2 particles on the PP grain surface homogeneously well. The results show that photocatalysis of peat water using TiO2-PP with solar irradiation is more effective than the UV lamp. After photocatalysis for 40 hours with solar irradiation, the humic acid content in peat water decreases significantly, accompanied by a decrease in Fe concentration. When being reused, TiO2-PP photocatalyst shows performance above 92% in the fourth iteration, while in the fifth iteration, the performance decreases to 83%. These results show that TiO2-PP has the potential to be applied as a reusable floating photocatalyst to reduce the humic acid and iron content in peat water.
Co-Authors . Antonius, . . Apriansyah . Faurizal . Hasanuddin . Kornellius A.A. Ketut Agung Cahyawan W Alexsianus Malujung Alhuda, Ervan alpiana, fila Andi Ihwan Artedi Asifa Asri Asifa Asri Atang Rahma Agusta Azrual Azwar Azrul Azwar Bintoro Siswo Nugroho Boni Lapanporo, Boni Boni Pahlanop Lapanporo Catur Purwanto, Catur Cucu Suhery Dayang Samsul Hidayah Desi Saputri Sri REZEKI Devi Yulianti Dian Prawira Dian Prawira, Dian Dwiria Wahyuni Elvi Rusmiyanto Pancaning Wardoyo, Suci Lestari, Mukarlina, Erna Wati Eusebius, Agustinus Evi Noviani Ezra Andwa Heradian, Ezra Andwa Fajar Arianto Fajar Arianto Febriyadi Romadhan Fitriyadi Fitriyadi Gapar Gapar, Gapar Gusrizal Gusrizal H., Cindy Priscilla Haisyah, Haisyah Hakim, Yusuf Umar Al Handika Hasanuddin Hasanuddin Hasanuddin Hasanuddin Hasmiati Hasmiati Hendro Tira Herli Herli Hestivera, Eva Novianti Hezliana Syahwanti Hutabarat, Victor Ibnur Rusi Iis Solehati Iklas Sanubary Ismail Ismail Jamilah, Syarifah Intan Jennifer Sulastri Joko Sampurno Joko Sampurno Juari, S Julia Bela Kart Kaharudin Kaharudin Karno - Karno Kushadiwijayanto, Arie Antasari Latifah Maesaroh Mariana Bara’allo Malino Mathali'ul Anwar Muhammad Kholid Muhardi Muhardi Muhardi Mutiah, Nurul Nia Syafitri Nur Fadhila Nuraniza Nuraniza Nurhasanah Nurhasanah Nurhasanah Nurhasanah Nurul Mutiah Nurul Wahdah Okto Ivansyah Perdhana, Radhitya Pramesti, Meita Ananda Purba Santoso, Purba Putra, Nurdin Satria Radhitya PERDHANA Rahmatullah, Sigid Renny Puspita Sari Rezeki, Desi Saputri Sri Rifatul Auzan Rika Kurniasih Rindiani Rindiani Riska Dewi, Riska Riyan Dano Prasetyo Riza Adriat Rizki Fajania Rohyati, Eny Rumyati Pujiastuti S Juari Saron, Mawar Satria Sumarwan, Satria Sidi, Makarius Siti Helmyati Suci Fitri Nazila Suraina Suraina, Suraina Syaripudin Syaripudin Theresia Oktatriani Tiofi, Timothi Triandi Kuseno Veronika Pitri Vikki Vikki Waras Selviani Octavia Yeni Apriyanti Yesi Dwi Jayanti Yoga Satria Putra Yoga Satria PUTRA Yuris Sutanto Yusuf Umar Al Hakim Yuzika Pausa Zulfian Zulfian