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All Journal Natural B Jurnal Fisika Unand Jurnal Informatika dan Teknik Elektro Terapan Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Jurnal Fisika FLUX JPSE (Journal of Physical Science and Engineering) AGREGAT AKSIOLOGIYA : Jurnal Pengabdian Kepada Masyarakat SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Journal of Physics and Its Applications Indonesian Physical Review Jurnal Fisika dan Terapannya Mitra Mahajana: Jurnal Pengabdian Masyarakat Jurnal El Tarikh: Journal of History, Culture, and Islamic Civilization Progressive Physics Journal Jurnal Ilmu dan Inovasi Fisika Lontar Physics Today InSTEM Frontier Advances in Applied Science and Engineering
Ahmad Zarkasi
Universitas Mulawarman
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Journal : Jurnal Fisika Unand

 1 
Desain Alat Identifikasi Tipe Oli Berdasarkan Nilai Intensitas Cahaya Menggunakan Sensor Light Dependent Resistor Berbasis Mikrokontroler Ahmad Zarkasi; Amirin Kusmiran; Erlinda Ratnasari Putri
Jurnal Fisika Unand Vol 10 No 4 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (739.541 KB) | DOI: 10.25077/jfu.10.4.518-524.2021

Abstract

Oli memiliki kompatibilitas yang berbeda-beda pada suatu unit alat berat dan dapat mempengaruhi performa mesin. Oleh karena itu, alat identifikasi tipe oli telah dikembangkan pada penelitian ini dengan menggunakan sensor light dependent resistor (LDR). Oli yang dijadikan objek pengujian bermerek Caltex dengan tipe SAE 10, SAE 30, SAE 40, SAE 60, dan SAE 90 dengan nilai viskositas berturut-turut yakni 6,0 cSt, 11,7 cSt, 13,7 cSt, 14,2 cSt, dan 25,5 cSt. Pengujian dilakukan dengan menempatkan sampel oli di antara sumber cahaya dan sensor LDR. Intensitas cahaya yang diterima oleh sensor sangat dipengaruhi oleh kecerahan warna sampel oli yang digunakan. Nilai analog dari sensor selanjutnya diakuisisi oleh mikrokontroler Arduino Nano untuk diproses lebih lanjut. Hasil pengujian menunjukkan bahwa alat yang dirancang sudah bekerja dengan baik dan mampu mengenali tipe oli dengan tingkat akurasi sebesar 96,7 %. 
Analisis Pergerakan Partikel terhadap Rekaman Mikrotremor di Permukaan Sungai Bawah Tanah Bribin, Kawasan Karst Gunung Sewu Kholis Nurhanafi; Ahmad Zarkasi; Sahara Hamas Intifadhah; Nugroho Budi Wibowo; Aditya Yoga Purnama
Jurnal Fisika Unand Vol 12 No 3 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.3.471-478.2023

Abstract

Microtremor has been widely used to determine soil characteristics and dynamics. In this research, particle motion analysis was conducted on 15 microtremor data recordings around the surface of the Bribin Underground River in the Gunungsewu Karst Area. Spectrum analysis was conducted as a basis for determining the frequency range for the particle motion analysis process. Particle motion analysis was only carried out on the horizontal component of the microtremor signal which is expected to provide a representation of the river flow path. The results of particle motion analysis of microtremor recordings in the surface area of the Bribin Underground River show that there are only two points that have a motion-resultant oriented to certain direction, which is perpendicular to the river channel.The points are A4 and B4 which are located in the eastern part of the river flow path.
Desain Alat Identifikasi Tipe Oli Berdasarkan Nilai Intensitas Cahaya Menggunakan Sensor Light Dependent Resistor Berbasis Mikrokontroler Zarkasi, Ahmad; Kusmiran, Amirin; Putri, Erlinda Ratnasari
Jurnal Fisika Unand Vol 10 No 4 (2021)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.10.4.518-524.2021

Abstract

Oli memiliki kompatibilitas yang berbeda-beda pada suatu unit alat berat dan dapat mempengaruhi performa mesin. Oleh karena itu, alat identifikasi tipe oli telah dikembangkan pada penelitian ini dengan menggunakan sensor light dependent resistor (LDR). Oli yang dijadikan objek pengujian bermerek Caltex dengan tipe SAE 10, SAE 30, SAE 40, SAE 60, dan SAE 90 dengan nilai viskositas berturut-turut yakni 6,0 cSt, 11,7 cSt, 13,7 cSt, 14,2 cSt, dan 25,5 cSt. Pengujian dilakukan dengan menempatkan sampel oli di antara sumber cahaya dan sensor LDR. Intensitas cahaya yang diterima oleh sensor sangat dipengaruhi oleh kecerahan warna sampel oli yang digunakan. Nilai analog dari sensor selanjutnya diakuisisi oleh mikrokontroler Arduino Nano untuk diproses lebih lanjut. Hasil pengujian menunjukkan bahwa alat yang dirancang sudah bekerja dengan baik dan mampu mengenali tipe oli dengan tingkat akurasi sebesar 96,7 %. 
Analisis Pergerakan Partikel terhadap Rekaman Mikrotremor di Permukaan Sungai Bawah Tanah Bribin, Kawasan Karst Gunung Sewu Nurhanafi, Kholis; Zarkasi, Ahmad; Intifadhah, Sahara Hamas; Wibowo, Nugroho Budi; Purnama, Aditya Yoga
Jurnal Fisika Unand Vol 12 No 3 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.3.471-478.2023

Abstract

Microtremor has been widely used to determine soil characteristics and dynamics. In this research, particle motion analysis was conducted on 15 microtremor data recordings around the surface of the Bribin Underground River in the Gunungsewu Karst Area. Spectrum analysis was conducted as a basis for determining the frequency range for the particle motion analysis process. Particle motion analysis was only carried out on the horizontal component of the microtremor signal which is expected to provide a representation of the river flow path. The results of particle motion analysis of microtremor recordings in the surface area of the Bribin Underground River show that there are only two points that have a motion-resultant oriented to certain direction, which is perpendicular to the river channel.The points are A4 and B4 which are located in the eastern part of the river flow path.
Co-Authors -, Syahrir A. Andira Maharani abdurrouf Abdurrouf Ade Fitriani, Ade Aditya Yoga Purnama Adrianus Inu Natalisanto Adryan Fitrayudha Ahmad Taufiq Hidayat Akbar Perdana Akbar Perdana Alris Sanca Pratama Putra Amirin Kusmiran Andi Syam Rizal Anwar Efendy Ariyanthi, Gita Putri Aulia Muttaqin Dadan Hamdani Dadan Hamdani, Dadan Didik Rahadi Santoso Erlinda Ratnasari Putri Hafiz Hamdani Hananda Putra, Muhammad Fauzan Hasan, Aly Hemelia, Junita Hidayatullah, Muhammad Idris Mandang Idris Mandang, Idris Intifadhah, Sahara Hamas Isfanari Jerri, Alyadris Kasturi Ramadani Kholis Nurhanafi Kormil Saputra Lalu Lunk Ryanata Putra Leo Anugerah Putra M Ramdani Novaldi Maolida Uci Handayani Minarti Minarti Mislan Mislan Mislan Mohammad Asrul Muhammad Awaluddin Muhammad Fawzy Ismullah Massinai Munir, Rahmawati Nugroho Budi Wibowo Nugroho Budi Wibowo Nur Hanafi, Kholis Nuraidha, Amalia C Nurohman, Ali Perdana, Akbar Pradana, Andre Juliko Putri, Devina Rayzi Perwitasari Sutaji Putri, Devina Rayzy Perwitasari Sutaji Rafika Ade Rahayu Rahayu, Rafika Ade Rita Desiani Sahara Serdian Eska Cahya Shonhaji Sukuryadi, Sukuryadi Supriyanto Supriyanto Syahrir Syahrir Syahrir Syahrir Syahrir Syahrir Ubaidillah, Aji Syailendra Ummah, Auliya Rahmatul Wahidah Wahidah Wahidah Wahidah Wardani, Pratiwi Sri Wulandari, Darmawati