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All Journal Jurnal Fisika FLUX Jurnal Pemberdayaan Masyarakat Madani (JPMM) Jurdimas (Jurnal Pengabdian Kepada Masyarakat) Royal Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Fisika : Fisika Sains dan Aplikasinya Jurnal Fisika dan Terapannya Optika : Jurnal Pendidikan Fisika Dewantara Journal of Technology Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Jurnal Ilmiah Wahana Pendidikan Journal of Science and Science Education (JoSSEd) Jurnal Pijar MIPA Research Review: Jurnal Ilmiah Multidisiplin Jurnal Riset Rumpun Matematika dan Ilmu Pengetahuan Alam (JURRIMIPA) QOSIM: Jurnal Pendidikan, Sosial & Humaniora Jurnal Pengabdian Rekayasa Sistem Journal of Mathematics, Computation and Statistics (JMATHCOS) KUANTUM BULETIN FISIKA
Latief, Muh Fachrul
Jurusan Fisika,Fakultas Matematika Dan Ilmu Pengetahuan Alam, Universitas Negeri Gorontalo
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TRANSFER KALOR KONDUKSI PADA PELAT ALUMUNIUM 2 DIMENSI DENGAN MENGGUNAKAN METODE FORWARD TIME CENTRAL SPACE (FTCS) Nonti, Efan Fajri Ramadhan; Mursalin, Mursalin; Latief, Muh. Fachrul
OPTIKA: Jurnal Pendidikan Fisika Vol. 8 No. 2 (2024): OPTIKA: Jurnal Pendidikan Fisika
Publisher : Department of Physics Education, Faculty of Teacher Training and Education, Universitas Flores

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37478/optika.v8i2.4871

Abstract

Perpindahan kalor adalah energi yang bergerak dari suatu tempat ke tempat lain akibat perubahan suhu dalam suatu sistem atau objek. Perpindahan kalor dapat terjadi melalui konduksi, konveksi, dan radiasi, dengan perpindahan secara konduksi terjadi karena suhu yang lebih tinggi pada suatu objek berpindah ke tempat dengan suhu lebih rendah. Penelitian ini bertujuan untuk mensimulasikan perpindahan kalor secara konduksi dua dimensi pada medium pelat aluminium menggunakan metode Forward Time Central Space (FTCS). Simulasi dilakukan melalui analisis numerik menggunakan software MATLAB, dengan perbandingan terhadap solusi analitik untuk mengevaluasi distribusi perpindahan kalor yang terjadi. Hasil simulasi menunjukkan distribusi perpindahan kalor yang divisualisasikan serta tingkat keakuratan metode numerik FTCS dibandingkan solusi analitik. Persentase keakuratan yang diperoleh sebesar 65,19%, menunjukkan bahwa metode FTCS kurang optimal untuk simulasi perpindahan panas dua dimensi pada pelat aluminium. Studi ini memberikan kontribusi dalam memahami keterbatasan metode FTCS dalam simulasi numerik perpindahan kalor dan mengusulkan potensi metode alternatif untuk akurasi yang lebih baik.
Karakterisasi Sifat Fisik Bioplastik Berbasis Pati Kulit Pisang Goroho dengan Penambahan ZnO Devita Irawati Putri; Jahja, Mohamad; Yunginger, Raghel; Latief, Muh. Fachrul; Ramadani, Andi Indra Wulan Sari
JFT : Jurnal Fisika dan Terapannya Vol 12 No 1 (2025): Juni 2025
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v12i1.53106

Abstract

An effective way to address the plastic waste problem is by minimizing the use of non-biodegradable plastics. One approach is to develop biodegradable plastic packaging that is environmentally friendly. This research used Goroho banana peel starch, this type of banana is used because it has good potential with a starch content of 80.89%. In this research, variations in ZnO concentration of 1%, 2%, 3%, 4%, and 5% w/w were conducted. This research aims to determine the characteristics of physical properties of bioplastics with the addition of ZnO. This research uses a laboratory experimental method through several processes, namely goroho banana peel starch extraction and bioplastic manufacturing. The results indicated that varying concentrations of ZnO significantly influenced the physical and biodegradation properties of the bioplastic products. The physical properties of the bioplastics produced have met the Indonesian National Standard (SNI) for water uptake of 21.5% and biodegradation of 60 days. FTIR results show that the functional groups of bioplastics are identical to the constituent functional groups, namely starch, so that their properties resemble the properties of their constituents, which are easily degraded. The most optimum bioplastic is BPZ 2 with the addition of ZnO at 2% w/w, which produces water uptake of 1.859% and degradation time of 12 days.
Thermal Performance of Public Green Space using Palm Fiber Net-Based Green Canopy and Passion Fruit (Passiflora Edulis) Vegetation Muksin, Engelina; Jahja, Mohamad; Setiawan, Dewa Gede Eka; Ramadani, A Indra Wulan Sari; Djafar, Abdi Gunawan; Latief, Muh. Fachrul
Computational And Experimental Research In Materials And Renewable Energy Vol. 8 No. 1 (2025): May
Publisher : Physics Department, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/cerimre.v8i1.53398

Abstract

This study aims to evaluate the thermal performance of green canopies in public green spaces (RTH), both outdoors and indoors, as an environmentally friendly solution. The method involved measuring temperature and humidity over a five-month period with four observation intervals. The data were analyzed using the Temperature-Humidity Index (THI) and compared with thermal comfort standards based on the Indonesian National Standard (SNI). The results show that at 0% plant coverage, the THI values fall into the "comfortable to slightly uncomfortable" category during the period from 19:00 to 08:00. In contrast, at 81.25% plant coverage, THI values remain in the "comfortable to slightly uncomfortable" range from 21:00 to 09:00. Relative humidity met the SNI standard of 75%. Furthermore, the outdoor temperature decreased by 4.9 °C, while the indoor temperature decreased by 3.5 °C. These findings indicate that the presence of green canopies, particularly in private green spaces, significantly reduces both outdoor and indoor temperatures as the percentage of plant coverage increases.Keywords: Public Green Space, Green Canopy, Temperature Humidity Index, Indonesian National Standards
Properti Cakrawala Peristiwa pada Lubang Hitam Schwarzschild dalam Latar Alam Semesta Tertutup yang Berekspansi Latief, Muh. Fachrul; Ramadani, Andi Indra Wulan Sari
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 9 (2024): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.13603701

Abstract

A closed universe model containing a constant and positive vacuum energy density (cosmological constant) has been studied. By analyzing the McVittie metric, it can be shown directly that for an expanding universe, the Hubble parameter at the event horizon for all static symmetric black holes is the same. As for the cosmological constant, black holes will not expand as the universe expands. In addition, the existence of the Hubble voltage is also explained which can affect the speed of the universe's expansion in certain areas.
Studi Sifat Fisik dan Kekuatan Tekan Material Komposit Serat Eceng Gondok dan Kulit Jagung Ramadani, Andi Indra Wulan Sari; Latief, Muh. Fachrul
Jurnal Ilmiah Wahana Pendidikan Vol 10 No 11 (2024): Jurnal Ilmiah Wahana Pendidikan 
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.13605106

Abstract

The high demand for materials with unique properties such as composites, especially in increasingly massively produced structural applications, requires the industry to switch from synthetic fiber reinforced composites such as fiberglass to composites with natural fibers. The use of natural fibers as fillers not only considers their environmentally friendly properties but also the nature of natural fibers which tend to have low density so that they are expected to be able to provide unique physical and mechanical properties to engineered composite materials. This study examines how the physical properties and compressive strength of composites with epoxy matrices and two types of natural fiber fillers, namely water hyacinth and corn husks. The results of this study indicate that alkali treatment in the preparation of corn husk and water hyacinth fiber samples significantly affects the density, porosity and compressive strength of the resulting composites. In addition, the uniformity of fiber orientation and the number of fibers per unit area also contribute positively to the physical properties and compressive strength of natural fiber composite samples.
Testing of Soil Moisture and Temperature Sensors in an Automatic Plant Watering System Based on the Internet of Things (IoT) Yudoyono, Susilo; Setiawan, Dewa Gede Eka; Yunus, Muhammad; Latief, Muh. Fachrul; Meidji, Icha Untari
Jurnal Pijar Mipa Vol. 20 No. 7 (2025)
Publisher : Department of Mathematics and Science Education, Faculty of Teacher Training and Education, University of Mataram. Jurnal Pijar MIPA colaborates with Perkumpulan Pendidik IPA Indonesia Wilayah Nusa Tenggara Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpm.v20i7.10585

Abstract

The implementation of automated plant watering systems in the agricultural sector utilizes sensor technology based on the Internet of Things (IoT). This study aims to evaluate the performance of soil moisture and temperature sensors utilizing the IoT in an automated plant watering system. The sensors used are the YL-69 sensor to determine soil moisture and the DS18B20 temperature sensor to determine soil temperature. Both sensors are connected to the NodeMCU ESP8266 microcontroller. Testing was conducted from 07:00 to 17:00 WITA, with a 1-hour interval for data collection, monitored using the IoT on the blink application on the cellphone. Then, the data obtained is analyzed to determine the values of error and accuracy. The results obtained on the soil moisture sensor have an average error of 0.989% with an average accuracy of 99.011%. Meanwhile, the results obtained on the soil temperature sensor have an average error of 1.240% with an average accuracy level of 98.760%. The lower the error value, the better the sensor performance indicates the sensor's ability to read data that is close to the actual value of the comparison tool. Likewise, the higher the level of sensor accuracy, the better and more reliable the sensor is when used in an IoT-based soil temperature measurement system. This value indicates that the sensor's performance has a very high level of reliability and precision in detecting soil moisture and temperature in real-time. This system can be applied in agricultural technology education and vocational training programs.
Sifat Termal Komposit Resin Berpenguat Serat Ijuk Sebagai Isolation Thermal Board Untuk Bahan Konstruksi Bangunan Sari, Widya Priskila; Jahja, Mohamad; Rahman, Irsan; Ramadani, A Indra Wulan Sari; Latief, Muh. Fachrul
KUANTUM: Jurnal Pembelajaran dan Sains Fisika Vol 6 No 2 (2025): KUANTUM: Jurnal Pembelajaran dan Sains Fisika (Edisi Desember 2025)
Publisher : Program Studi Pendidikan Fisika STKIP Kie Raha Ternate

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63976/kuantum.v6i2.1157

Abstract

Isu efisiensi energi pada bangunan semakin mendesak untuk diatası mengingat sektor konstruksi merupakan salah satu penyumbang terbesar konsumsi energi dan emisi global Di Indonesia, penggunaan material insulası termal sintetis seperti polistirena masih dominan, meskipun matenal tersebut memiliki permasalahan lingkungan yang signifikan karena tidak terurai, menghasilkan polusi berbahaya, serta memiliki jejak karbon tinggi Kondisi ini mendorong perlunya alternatif material insulası yang lebih berkelanjutan berbasis sumber daya lokal. Serat ijuk (Arenga pinnata), dengan sifat morfologi berongga, ketahanan terhadap kelembapan, dan struktur mikrofibril yang mendukung hambatan panas, menjadi kandidat potensial untuk dikembangkan sebagai penguat pada komposit resin untuk aplikası panel insulası termal. Penelitian ini bertujuan mengevaluasi secara komprehensif pengaruh variasi fraksi serat juk terhadap sıfat termal komposit resin dan menjelaskan mekanisme hambatan perpindahan panas melalui analisis morfologi mikro. Metode yang digunakan berupa eksperimen dengan tiga variasi komposisi serat (1:1, 1:2, 1:3), menggunakan resin epoxy sebagai matriks. Serat diberi perlakuan alkali NaOH 5% sebelum difabrikası menjadi komposit. Pengumpulan data dilakukan melalui uji konduktivitas termal serta pengamatan struktur mikro menggunakan Scanning Electron Microscope (SEM). Hasil penelitian menunjukkan bahwa rasio 1:2 memiliki nilai konduktivitas termal tertinggi (0.646 W/m.K), sedangkan komposisi serat terlalu rendah atau terlalu tinggi memperlihatkan penurunan performa termal akibat ketidakmerataan dispersi serat atau terbentuknya rongga udara. Analisis SEM mengonfirmasi bahwa perlakuan alkali mampu meningkatkan kebersihan dan kekasaran permukaan serat sehingga memperbaiki ikatan antarmuka dan jalur rambatan panas komposit. Implikasi penelitian ini menunjukkan bahwa serat ijuk berpotensi digunakan sebagai material insulasi ramah lingkungan untuk bangunan. Rekomendasi penelitian selanjutnya adalah mengembangkan variasi orientasi serat, pengujian sifat mekanik tambahan, serta optimasi proses fabrikasi untuk meningkatkan performa komposit secara menyeluruh.
Development of a Hybrid Model of Diffie–Hellman and Hill Cipher Based on Fuzzy Sets for Strengthening Cryptographic Key Security Armayani Arsal; Muh. Fachrul Latief
Journal of Mathematics, Computations and Statistics Vol. 9 No. 2 (2026): Volume 09 Issue 02 (June 2026)
Publisher : Jurusan Matematika FMIPA UNM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35580/62jpw347

Abstract

In this paper, key security has been examined, which is a fundamental factor in cryptographic systems because the quality of the key significantly affects the algorithm's resilience against cryptanalysis attacks. This research aims to develop a hybrid cryptography model of Diffie-Hellman and Hill Cipher based on fuzzy sets. This hybrid model is designed by combining the advantages of Diffie–Hellman in the secure key exchange process with Hill Cipher as a matrix-based encryption algorithm. Fuzzy sets are used as an adaptive mechanism in the key generation and strengthening process to enhance the randomness, complexity, and uncertainty of the key value. The research methods include literature study, hybrid scheme design, fuzzy rule formulation, and implementation of encryption and decryption processes. The result of this research is the formation of a hybrid cryptography model capable of generating keys that are more difficult to predict, thereby strengthening data protection against potential cryptanalysis attacks.
Konversi Energi Termal Hasil Pembakaran Limbah Batang Jagung (Zea mays) Menjadi Energi Listrik Menggunakan Sistem TEG Nur Safitri Madi; Asri Arbie; Muh Fachrul Latief
Research Review: Jurnal Ilmiah Multidisiplin Vol. 4 No. 1 (2025): Research Review: Jurnal Ilmiah Multidisiplin (Februari 2025 - Juli 2025)
Publisher : Transbahasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54923/researchreview.v4i1.137

Abstract

The increasing demand for electricity, environmental pollution, and global warming are major challenges today. One potential solution is the utilization of biomass as an alternative energy source. This study explores the conversion of agricultural waste, specifically corn stalks, into electrical energy using a Thermoelectric Generator (TEG) on a small scale. An experimental method was employed with series and Paralel configurations to analyze system efficiency. The results indicate that after 90 minutes, the maximum power output during supercapacitor charging was 0.684 W for the series configuration and 0.301 W for the Paralel configuration. Without supercapacitor charging, the power output was 0.4118 W for the series and 0.175 W for the Paralel configuration. In terms of converted energy, the series configuration produced 33.7 Wh, while the Paralel configuration generated 35.75 Wh. These findings suggest that although the series configuration is more efficient in generating peak power, the Paralel configuration yields a higher total energy conversion. This study provides insights into biomass utilization as a sustainable energy source in Gorontalo.
Mechanical Study of Paving Block Based on High Density Polyethylene (HDPE) Polymer With The Addition of Natural Fiber Filler (Rice Husk, Silica Sand and Sugar Cane Bagassa) Syahdad Aziz; Mursalin Mursalin; Muh. Fachrul Latief; A. Indra Wulandari Ramadani; Setiawan Dewa Gede Eka; Idawati Supu
BULETIN FISIKA Vol. 27 No. 2 (2026): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/BF.2026.v27.i07

Abstract

This research has succeeded in making HDPE polymer-based paving blocks with the addition of natural fiber fillers consisting of 3 types, namely rice husks, bagasse, and silica sand. The aim is to see the composition and mechanical properties of the best paving blocks with HDPE plastic waste as a polymer. The method used in this research is experimental, namely making paving blocks directly as the main approach, then analyzing their mechanical properties. The composition ratio between the polymer and the filler consists of 30%, 70%, 50%, 50% and 70%, 30%, respectively. The samples that were successfully made were then tested (compressive strength, porosity) and characteristic tests (Scanning Electron Microscope (SEM) and X-Ray Fluorescence (XRF).
Co-Authors A. Indra Wulandari Ramadani Abdi Gunawan Djafar Ahmadi, Haerul Andi Indra Wulan Sari Ramadani Armayani Arsal Asmiati Amir Asri Arbie Devita Irawati Putri Dewa Gede Eka Setiawan Fikri Maulana Ntobuo Fitriani Fitriani Fitryane Lihawa Haris Munandar Icha Untari Meidji Idawati Supu Indriati Martha Patuti Irsan Rahman, Irsan Jahja, Mohamad Kurniasari, Septiana Lapananda, Nuraliva F.P Meidji, Icha Untari Meilan Demulawa Muh. Nur Akbar Muhammad Jahja Muhammad Yunus Muhammad Yunus Muhammad Yunus Muksin, Engelina Mulis Ali Mursalin . Mursalin Mursalin Nonti, Efan Fajri Ramadhan Nur Safitri Madi Nurfitri Abdul Gafur Nurhayati Sari, Widya Priskila Setiawan Dewa Gede Eka Siti Fatimah Sri Yanti N Ismail Supu Idawati Supu, Idawati Syahdad Aziz Yita Irmala Sari Yudoyono, Susilo Yulistiana Datu