Article Per Year (5 Year)
p-Index From 2021 - 2026
4.532
P-Index
This Author published in this journals
All Journal Jurnal Pendidikan Fisika Undiksha Jurnal Sains dan Pendidikan Fisika Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Geografi, Edukasi dan Lingkungan Educatio Jurnal Otomasi Kontrol dan Instrumentasi Jurnal Pendidikan Fisika dan Teknologi Jambura Physics Journal Jurnal Fisika dan Terapannya Jurnal Sibermas (Sinergi Pemberdayaan Masyarakat) Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Jurnal Ilmiah Wahana Pendidikan Jurnal Jendela Pendidikan BIOCHEPHY: Journal of Science Education Jurnal Pijar MIPA KUANTUM BULETIN FISIKA
Jahja, Mohamad
Universitas Negeri Gorontalo
Religion Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics Public Health Social Sciences Other

Published : 28 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 28 Documents
Search

 1   2   3 
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
The Development of Monopoly Physics Science Media (MOFIN) on Simple Harmonic Motion at MA Al-Falah Tolutu Rahman, Abd; Yunginger, Raghel; Payu, Citron S.; Abdjul, Tirtawaty; Jahja, Mohamad; Setiawan, Dewa Gede Eka
Jurnal Pendidikan Fisika dan Teknologi (JPFT) Vol 9 No 1 (2023): Januari - Juni
Publisher : Department of Physics Education, Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jpft.v9i1.4816

Abstract

This research aims to determine the design and feasibility of the MOFIN learning media. This research model employs the 4D method (Define, Design, Development, and Dissemination). Data collection techniques include interviews (initial stage), observations, and tests (experimental stage). The validity of the MOFIN learning media design obtained an average scale of 3.43 from the validators, with the "Valid" criteria indicating that it can be used with some revisions. The results of the experimental testing (practicality) of the MOFIN learning media revealed that the implementation of the learning process was "Very Good," with a percentage of 93%. The response from the students showed the highest percentage in the aspect of "Character Education," with a percentage of 91% or received a "Very Good" response. The effectiveness of the media was assessed through the students' activities, which showed an average percentage of 94%. After conducting the learning assessment test, the students obtained an average score of 86.25, with the lowest score being 77, indicating that they have reached the Minimum Completeness Criteria (KKM) set by MA Al-Falah Tolutu
Development of an E-Module Based on 3D Pageflip Professional on the Concept of Vibration and Wave Saleh, Melisa Damayanti R.; Abdjul, Tirtawaty; Jahja, Mohamad; Mursalin; Uloli, Ritin; Arbie, Asri
Jurnal Penelitian Pendidikan IPA Vol 10 No 10 (2024): October
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v10i10.9138

Abstract

This e-module based on 3D Pageflip Professional can support and facilitate students in the learning process. This research aims to determine the quality of the E-module based on validity, practicality, and effectiveness. The method used is Research and Development (R & D) with a 4D model. This research was conducted in class VIII, namely Class VIII.1 and Class VIII.2, at SMP Negeri 1 Telaga Jaya. Data collection techniques are carried out through observation, questionnaires, tests, and data analysis using descriptive analysis. The research results show that the validity determined through media expert validation reached 3.69 and material expert 3.77, obtaining valid criteria. The practicality is determined through learning implementation, reaching 90% with very good criteria, and student response reaching 87% with good criteria. The effectiveness is determined through student activity, reaching 89% with good criteria and student learning outcomes with an N-Gain value of 0.8 with high N-Gain criteria. Based on the research results, the E-module based on 3D Pageflip Professional is suitable for use and meets the valid, practical, and effective criteria.
Prototipe Sistem Keamanan Kas Baterai dan Kendali Lampu pada Rumpon dengan Kendali Telegram Amien, M.Mifthahul; Jahja, Mohamad; Yunginger, Raghel; Yunus, Muhammad; Tansa , Salmawaty; Nasibu, Iskandar Zulkarnain
Jurnal Otomasi Kontrol dan Instrumentasi Vol 15 No 1 (2023): Jurnal Otomasi Kontrol dan Instrumentasi
Publisher : Pusat Teknologi Instrumentasi dan Otomasi (PTIO) - Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/joki.2023.15.1.1

Abstract

Fishermen use fishing aids called FADs to take advantage of Indonesia's marine potential. The problem fishermen face using FADs is the frequent loss of essential components in FADs, such as lights, batteries, and solar panels. Previously there was a security system that used SMS and GPS. However, there is no trigger, and still using SMS is a weakness of this existing system. This study aims to help solve this problem by developing a prototype that functions as a security system that no longer uses SMS and has a trigger. Rubot32 is the result of the design of this security system. It has an internal GPS to determine the device's position with sufficient accuracy. This ultrasonic sensor-based trigger will trigger a warning notification on the Telegram Bot and activates a high-voltage stinger and a functioning control system via Telegram Bot.
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.
Analysis of the Hydrodynamic Characteristics of Limboto Lake Waters Based on Momentum Fluxes Khan, Mikail Gabriel Khan; Yunginger, Raghel Yunginger; Setiawan, Dewa Gede Eka; Jahja, Mohamad; Meidji, Icha Untari; Ahmadi, Haerul; Kusmayancu, Cucu; Nalle, Merpati Teodoris
BULETIN FISIKA Vol. 27 No. 1 (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.i01.p02

Abstract

The waters of Lake Limboto show a decline in water quality, characterized by a decrease in clarity. Environmental factors, such as wind speed and direction, play a significant role in influencing the dynamics and quality of lake waters. To understand the influence of wind on water conditions, a comprehensive hydrodynamic study is required. This study focuses on analyzing the hydrodynamic characteristics of Lake Limboto waters based on momentum flux and its implications for lake water conditions. Wind speed and direction measurements were conducted on seven ducks in Lake Limboto waters during the period of November 1-3, 2024. Data were collected in the morning, afternoon, and evening. The lake's hydrodynamic characteristics were determined using formulas from the measured data. Hydrodynamic characteristics were interpolated using IDW cross validation leave one out and optimized with rank and neighboring point parameters. Wind direction was interpolated using IDW and converted into a vector field using Vector Field Layer Manager. It was found that the momentum flux by wind in Lake Limboto waters has a value range of 0-0.05 N/m2, and cross validation produced an RMSE of 0.003-0.01 N/m2. The interaction of momentum flux from wind and river flow causes sediment to be deposited in the coastal area of ​​Lake Limboto.
Development of an Incinerator with a Multi-Stage Condenser System as an Effort to Reduce CO₂ Emissions Gas from Plastic Waste Burning in Gorontalo City Yunginger, Raghel; Usman, Yusuf; Demulawa, Meilan; Tansa, Salmawaty; Jahja, Mohamad; Yunus, Muhammad
BULETIN FISIKA Vol. 27 No. 1 (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.i01.p03

Abstract

The increasing plastic waste volume in Gorontalo City is not balanced by a good management system, making people choose to burn their waste in open space. Not only makes a bad scene, this burning emits dangerous gases such as CO2 that contributes to poor air quality and climate change. This study has developed an environmentally friendly incinerator with a stacked condenser system that emits less CO2 gas. This incinerator consists of three main components: a combustion zone, as the place where plastic waste is burned; a chimney, for the flowing of gas; and stacked condensors, for cooling and keeping the gas before emitting it out. We test the incinerator with and without condensors based on the CO2 emission from 20 minutes' burning of 1.5 kg of plastic waste. The results show that an incinerator with a stacked condensor system can significantly reduce CO2 gas emissions by 18.88% more than an incinerator without condensors. This implies that incinerator with stacked condensors can be an alternative way to reduce CO2 gas from open-space waste burning on a small scale.
Co-Authors Abd Rahman Abd Wahidin Nuayi Abdi Gunawan Djafar Abdul Haris Odja Ahmadi, Haerul Aisyah Aisyah Amien, M.Mifthahul Andi Indra Wulan Sari Ramadani Andi Iskandar Andi Patiewere Metaragakusuma Asri Arbie Buhungo, Trisnawaty Junus Citron S Payu Daud Yusuf Devita Irawati Putri Dewa Gede Eka Setiawan Dewi Diana Paramata FARADILLA, FARADILLA Gafur, Nurfitri Abdul Hersiq Basri Indah Parawangsa Umar Indrawan Hermanto Abdjul Indriati Martha Patuti Irsan Rahman Irsan Rahman, Irsan Iskandar Zulkarnain Nasibu Ismail, Sri Yanti N. Kasim Dihuma Khan, Mikail Gabriel Khan Kurniasari, Septiana Kusmayancu, Cucu Latief, Muh. Fachrul Masayuki Sakakibara Masri Kudrat Umar Matalapu, Irawan Meidji, Icha Untari Meilan Demulawa Mohamad, Humaira Muhammad Yunus Muhammad Yusuf Muksin, Engelina Mursalin Mursalin Mursalin . Nalle, Merpati Teodoris Ndune, Indah Sari Nurfadillah Abdullah Rahim, Niarti Ritin Uloli Saleh, Melisa Damayanti R. Salmawaty Tansa Sari, Widya Priskila Soeharto Soeharto Supartin Supartin Supu Idawati Supu, Idawati Supu, Idawaty Suwaldi Mopangga Tang, Bunga Tansa , Salmawaty Tirtawaty Abdjul Tsutomu Yamaguchi Usman, Yusuf Yunginger, Raghel Yunginger Zakaria, Christina T.