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All Journal BIOTROPIA - The Southeast Asian Journal of Tropical Biology Jurnal Neutrino : jurnal fisika dan aplikasinya Jurnal Fisika Unand Wikrama Parahita : Jurnal Pengabdian Masyarakat Jurnal Penelitian Pendidikan IPA (JPPIPA) Abdimas Talenta : Jurnal Pengabdian Kepada Masyarakat Martabe : Jurnal Pengabdian Kepada Masyarakat JPF : JURNAL PENDIDIKAN FISIKA Gravitasi: Jurnal Pendidikan Fisika dan Sains Jurnal Abdi: Media Pengabdian Kepada Masyarakat Global Science Society Aceh International Journal of Science and Technology JURUTERA (Jurnal Umum Teknik Terapan) Jurnal Masyarakat Berdikari dan Berkarya (MARDIKA)
Putra, Rachmad Almi
Program Studi Fisika, Fakultas Teknik, Universitas Samudra
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Identification of Slip Surfaces Using Vertical Electrical Sounding Method in Desa Seumadam for The Study of Landslide-Prone Areas Anda, Sabrian Tri; Fajriani, Fajriani; Fajri, Haikal; Fadhli, Zul; Fahril, Muhammad Ari; Putra, Rachmad Almi
Aceh International Journal of Science and Technology Vol 13, No 1 (2024): April 2024
Publisher : Graduate School of Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13170/aijst.13.1.34605

Abstract

This study explores the application of the Vertical Electrical Sounding (VES) method for identifying potential slip surfaces in the Desa Seumadam region, a known landslide-prone area. By employing geophysical techniques, the assessment has been made in order to delineate the subsurface characteristics for slip surface identification landslide volume estimation. Based on data interpretation regarding the resistivity model of the subsurface in the study area, the slip surface or weak zone is classified as a clay layer underlain by sand and clayey sand layer. The clay is identified with resistivity value varying from 7 54.5 m and located at depth of 6 to 11.68 m while the sand and clayey sand layer are categorized with resistivity value of 4 1395 m with a thickness of 11.68 m. As for the estimation of landslide volume, the calculation was made using the landslide mass volume potential approach and found that the landslide volume is estimated at around 2.139 m3. It is believed that the study not only reveals the potential slip surface of the study area but also enhances the understanding of landslide mechanisms. The findings reveal valuable insights into the geological factors contributing to landslides, facilitating informed decision-making for landslide risk mitigation and land-use planning.
Identifikasi Aliran Fluida Panas Menggunakan Metode Self-Potential di Daerah Manifestasi Panas Bumi Paya Meuligoe Dicky Banjar Negara; Fajriani Fajriani; Rachmad Almi Putra
Jurnal Fisika Unand Vol 11 No 4 (2022)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.11.4.421-427.2022

Abstract

Penelitian identifikasi aliran fluida panas telah dilakukan di daerah manifestasi panas bumi Paya Meuligoe. Penelitian ini bertujuan untuk menentukan pola aliran fluida panas di Desa Paya Meuligoe, Aceh Timur. Pengambilan data pengukuran Self-Potential menggunakan konfigurasi fixed base dengan jarak interval elektroda 1 meter. Data didapatkan diolah menggunakan Microsoft Excel untuk mencari data potensial terkoreksi dan Software Surfer untuk memperoleh peta kontur isopotensial. Hasil penelitian metode SP didapatkan berupa data potensial di kawasan penelitian dengan intensitas nilai diperoleh adalah 12 mV, nilai terendah adalah -30 mV. Dari nilai sebaran potensial tersebut dapat dikatakan arah aliran fluida panas di daerah Paya Meuligoe mengarah dari selatan menuju utara.
Rancang Bangun Alat Pendeteksi Ketinggian Permukaan Air Berbasis Mikrokontroler Arduino Uno Yakob, Muhammad; Sagita, Nila; Putra, Rachmad Almi
JURUTERA - Jurnal Umum Teknik Terapan Vol 6 No 01 (2019)
Publisher : Fakultas Teknik Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55377/jurutera.v6i01.1489

Abstract

Automatic monitoring of changes in water level by applying microcontroller technology as a data processing media and HC-SR04 Ultrasonic Sensor as distance reading media produces output in the form of information on changes in water level where the tool will also activate the Buzzer as an early warning marker for the surrounding community that signifies change water level This tool can reduce physical losses and fatalities due to changes in water level. Making Water Surface Height Detection Tool Using Arduino Uno Microcontroller consists of several stages, namely making block diagrams, designing a system consisting of hardware, software, and program design, testing tools, tool calibration and data retrieval. Based on the results of the tests that have been carried out the results show that the Water Surface Height Detection Tool works as expected.
Teknologi Kamera Cerdas Mengikuti Objek Secara Otomatis dengan Sensor Ultrasonik HC-SR04 Ari, M. Ari fahril; Nila, Ida Ratna; Anda, Sabrian Tri; Fajriani; Putra, Rachmad Almi; Naziah, Afrahun; Sari, Nirmala; Ilma, Rachsha Kulla
Jurnal Pendidikan Fisika dan Sains Vol 8 No 01 (2025): GRAVITASI: JURNAL PENDIDIKAN FISIKA DAN SAINS
Publisher : Program Studi Pendidikan Fisika FKIP Universitas Samudra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33059/gravitasi.jpfs.v8i01.12802

Abstract

Seiring kemajuan teknologi, semakin meningkatlah kepentingan computer vision. Hal ini paling jelas penerapannya dalam sistem pengawasan dan keamanan. Teknologi ini akan memungkinkan komputer mengenali dan mendeteksi sebagian besar objek secara otomatis, menggantikan sejumlah besar orang dalam pekerjaan pengawasan. Tujuan penelitian ini adalah untuk mengembangkan sistem kamera otomatis. Sistem ini menggunakan beberapa sensor ultrasonik HC-SR04 dan motor servo untuk mendeteksi pergerakan objek secara real time. Metode sistem ini adalah dengan mendeteksi jarak objek dengan menggunakan sensor ultrasonik, lalu data tersebut diolah oleh mikrokontroler yang nantinya digunakan untuk menggerakkan motor servo. Sehingga kamera pada awalnya dapat menetapkan posisi dimana objek berada, sesudahnya kamera akan bergerak mengikuti objek tersebut. Dengan begitu, kamera dapat menetapkan fokus pada objek tanpa harus diatur oleh operator, karena semuanya berjalan secara otomatis. Hasil penelitian membuktikan bahwa sistem ini dapat bekerja sesuai dengan tujuan dan dapat melacak dengan akurat sehingga luas pemantauan menjadi lebih efektif. Sistem ini dapat diterapkan dalam banyak bidang seperti keamanan rumah, pengawasan kantor, pemantauan mesin produksi, dan lain-lain. Penentuan pergerakan kamera sangat tergantung dari ketepatan sensor ultrasonik membaca posisi objek. Penentuan posisi objek yang bergerak dapat di tentukan dari penempatan beberapa sensor ultrasonik yang diletakkan dengan sudut yang berbeda-beda
Effect of Calcium Nitrate on Chlorophyll-Based Biotransducer Characterization of Arthrospira platensis Gomont Sari, Mulia Safrida; Putra, Rachmad Almi; Dwitya, Yonadiah; Fahril, M Ari
BIOTROPIA Vol. 32 No. 2 (2025): BIOTROPIA Vol. 32 No. 2 August 2025
Publisher : SEAMEO BIOTROP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11598/btb.2025.32.2.2480

Abstract

ARTICLE HIGLIGHTS- Calcium nitrate is utilized to enhance the growth and chlorophyll quality of Arthrospira platensis Gomont, aiming to maximize its potential as a biotransducer molecule.- Biomass productivity was monitored every three days during a 15-day cultivation period, with specific attention to biomass accumulation and specific growth rates during the stationary phase.- Chlorophyll concentrations (chlorophyll a, chlorophyll b, and total chlorophyll) were measured using a UV-Vis spectrophotometer at wavelengths of 648 nm and 664 nm.- Fourier-transform infrared spectroscopy (FTIR) was performed on chlorophyll extracts to assess molecular binding capacity, reinforcing Arthrospira platensis Gomont’s potential as a biotransducer.- A concentration of 4.5 g/L of calcium nitrate, in combination with 35 ppt salinity, was found to be optimal for enhancing chlorophyll production during cultivation.ABSTRACTThe aim of this study is to investigate the potential of calcium nitrate as a specific nutrient capable of enhancing the chlorophyll content and optimizating the biotransducer characterization in Arthrospira platensis Gomont. The experimental design employed a Completely Randomized Design (CRD) with Two Factors, consisting of 12 treatments and 3 replications. Each research group was conditioned with varying salinity levels: 15 ppt (S15), 25 ppt (S25), and 35 ppt (S35). In the treatment groups, calcium nitrate was added at different concentrations: 2.5 g/L (P1), 3.5 g/L (P2), and 4.5 g/L (P3). Biomass accumulation and specific growth rate were monitored and data were collected throughout the experiment. At the end of the treatment period, chlorophyll was extracted and its concentration was measured using UV-Vis Spectrophotometry and FTIR analysis. The results indicated that the addition of calcium nitrate 4.5 g/L combined with 35 ppt salinity increased the average biomass productivity over 15 days by 5.1 g/L, with a specific growth rate in the stationary phase of 0.12 per day. Supplementation of calcium nitrate 4.5 g/L in 35 ppt salinity was found to increase total chlorophyll concentration to 70.15 μg/mL, further supporting its potential as a supplementary nutrient to enhance the biotransducer properties with five key functional groups for the stability and binding affinity of analyte molecules in SPR application.
Co-Authors Afrahun Naziah Alamsyah, Wan Alamsyah, Wan Ari, M. Ari fahril Asmadi Suria Beni Al Fajar Dicky Banjar Negara Dwitya, Yonadiah Fadhli, zul Fadlly, Teuku Andi Fahril, M Ari Fahril, Muhammad Ari Fairus, Fairus Fajri, Haikal Fajriani Fajriani Fajriani Fajriani Fajriani Fajriani Fajriani Fajriani Fajriani Fitriani Fitriani Ginda M.A.Siregar Hamdani Umar Hendri Saputra Ida Ratna Nila Ida Ratna Nila Ilma, Rachsha Kulla Indrayana, I PT Ismida, Yulina Jofrishal Jofrishal Maimun Syukri Maulana Rahman Miranda Miranda Miswar Muhammad Yakob Muhammad Yakob Mutia, Eka Naziah, Afrahun Ni Putu Sri Harta Mimba Nirmala Sari Nirmala Sari Nur Azizah Lubis Rahmatul Fajri Rahmawati, Rahmawati Rahmawati, Rahmawati Sabrian Tri Anda Sagita, Nila Sahputra, Hendri Salamul Fajar Salman Samsul Rizal SARI, MULIA SAFRIDA Siti Humairoh Suria, Asmadi T. Muhammad Sahudra T.Andi Fadlly Teuku Andi Fadlly Teuku Andi Fadlly Tisna Harmawan Ulil Amna Wahyuningsih, Puji Wahyuningsih, Puji Yakob, Muhammad Yulida Amri