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All Journal Indonesian Journal of Geography Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics POSITRON Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains dan Teknologi Komunikasi Fisika Indonesia TELKOMNIKA (Telecommunication Computing Electronics and Control) Indonesian Journal of Electrical Engineering and Informatics (IJEEI) Journal of Aceh Physics Society Jurnal Litbang Industri JOURNAL ONLINE OF PHYSICS Jurnal Fisika FLUX Proceeding of the Electrical Engineering Computer Science and Informatics Jurnal Ilmiah Pertanian JMPM (Jurnal Material dan Proses Manufaktur) Jurnal Pengabdian UntukMu NegeRI Journal of Research and Technology JURNAL PHOTON Indonesian Physical Review Jurnal Teori dan Aplikasi Fisika Science, Technology, and Communication Journal
Romi Fadli Syahputra
Department Of Physics, Faculty Of Mathematics, Natural Sciences & Health, Universitas Muhammadiyah Riau, Pekanbaru, Indonesia
Religion Agriculture, Biological Sciences & Forestry Astronomy Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Social Sciences

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Fabrikasi dan Karakterisasi Tinta Bubuk dari Karbon Aktif Batang Kelapa Sawit untuk Aplikasi Printer Laser Ginting, Delovita; Syahputra, Romi Fadli; Lubis, Viviana; Yani, Adila Fitri
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 2 (2023): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i2.52059

Abstract

Tinta bubuk merupakan komponen utama dari proses pencetakan printer laser. Tinta bubuk pada dasarnya merupakan campuran pigmen atau pewarna, bubuk logam,dan polimer. Penelitian ini bertujuan memanfaatkan batang kelapa sawit sebagai karbon aktif untuk zat pewarna pada tinta bubuk yang diaplikasikan pada printer laser. Proses pembuatan karbon aktif meliputi preparasi sampel, karbonisasi, aktivasi kimia, dan aktivasi fisika. Karbon aktif dilakukan pengujian kadar air, kadar zat menguap, kadar abu, kadar karbon terikat, dan uji distribusi partikel size. Pembuatan tinta bubuk pada penelitian ini terdiri dari karbon aktif (sebagai zat pewarna), ferrite powder (zat logam), dan styrene acrylic (polimer). Penelitian ini menggunakan perbandingan karbon aktif dan ferrite powder 4 : 1. Penelitian ini ingin melihat kualitas dari tinta bubuk dengan menggunakan pewarna karbon aktif batang kelapa sawit dengan memvariasikan jumlah styrene acrylic. Jumlah variasi styrene acrylic yang ditambahkan pada pembuatan tinta bubuk yaitu TB1 (48:12:40), TB2 (40:10:50), dan TB3 (32:8:60). Tinta bubuk dilakukan pengujian distribusi partikel size, uji SEM, analisis citra, dan kualitas cetak menggunakan printer laser. Hasil penelitian karbon aktif yang dihasilkan memiliki kadar air 2%, kadar zat menguap 15%, kadar abu 23%, dan kadar karbon terikat 40%. Uji distribusi ukuran partikel menunjukkan ukuran 0.115 µm hingga 592.387 µm. Pengujian analisis citra tinta bubuk menggunakan ImageJ dengan perbandingan bervariasi, TB3 memiliki sedikit elemen putih dibandingkan TB1 dan TB2. Berdasarkan hasil analisis citra, nilai gray rata-rata TB3 mendekati nilai tinta bubuk komersial.
Portable Smart Door base on Arduino and Artifical Neural Network for Temperature and Face Mask Detection Fitrya, Neneng; Ginting, Delovita; Wirman, Shabri Putra; Anggreani, Selvia; Ariyani; Syahputra, Romi Fadli
JST (Jurnal Sains dan Teknologi) Vol. 12 No. 2 (2023): July
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/jstundiksha.v12i2.53491

Abstract

Temperature checks and wearing masks are an effort to reduce the transmission of Covid-19. Manual checking is impractical and spent time screening many people in public areas. This work propose a portable smart door that simultaneously detects the body temperature and mask of the people. Temperature detection uses MLX90614 sensor and Arduino, while mask recognition uses digital camera with artificial neural network (ANN). Component test and completion test are conducted to examine the smart door performance involving 20 volunteers. The door was tested to measure the body temperature of the volunteers with and without a mask. The measured temperature was compared with measurements of a thermal gun. The door will open automatically if the temperature is below 37.2°C and wearing a mask, while remaining closed if above 37.2°C or not wearing a mask. The temperature sensor works properly with a small deviation and saving time almost half of thermalgun response time. The accuracy of mask detection by the ANN is also at a high level of confidence. These findings demonstrate the applicability of the smart door for screening body temperature and mask in public areas for faster and precise.
Karakterisasi Papan Gipsum Dengan Penambahan Polimer EVA (Ethylene Vinyl Acetate) Rachmawati, Rachmawati; Ginting, Delovita; Syahputra, Romi Fadli
Photon: Jurnal Sain dan Kesehatan Vol. 13 No. 1 (2022): Jurnal Photon
Publisher : LPPM Universitas Muhammadiyah Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jp.v13i1.4061

Abstract

Gypsum is a composite material product that is used as a building material and is commonly used as building partitions, ceilings, bulkheads, and room accessories. However, gypsum also has a weakness in terms of ductility and is not waterproof. EVA (Ethylene Vinyl Acetate) is a polymer that transforms with an environmentally friendly waterproof mortar. The purpose of this study was to determine the process of making gypsum board with the addition of EVA to determine the effect of EVA polymer on gypsum board. The gypsum and EVA ratio variables used were GPC (100% : 0%) and GPEVA (88% : 12%). The procedure used in this experiment is sample testing, namely density test, water content test, water absorption test, and flexural strength test. Gypsum board composite by adding EVA to the density test, the density value of the GPC sample was 1.28 g/cm³, while the GPEVA sample (88%: 12%) was 1.27 g/cm. To test the water content and water absorption for the GPC sample, it was 5.5% and 62.5%, while for the GPEVA sample the values ​​were 4.7% and 14.5%, respectively. For the flexible strength test the control has a value of 1.3 N/mm² on the sample; GPEVA has a value of 0.95 N/mm². The addition of 12% EVA in the manufacture of gypsum board effectively increases the ability of gypsum to hold water by 76.75%..
FABRICATION OF THERMAL BIO-INSULATOR FROM OIL PALM TRUNK FIBER: ANALYSIS OF THERMAL, PHYSICAL AND MECHANICAL PROPERTIES Yana, Debi; Husna, Ropiqotul; Kusmawati, Intan; Ginting, Delovita; Syahputra, Romi Fadli; Taer, Erman
Indonesian Physical Review Vol. 7 No. 2 (2024)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v7i2.279

Abstract

The majority of air conditioning systems, including both cooling and heating systems, consume a significant amount of electrical energy as a result of their high electrical consumption and prolonged periods of operation. The use of thermal insulation materials in the building can help conserve electrical energy used for room conditioning systems. Natural fibers are used as an alternative in the production of thermal insulation, which is commonly referred to as bio-insulators. The utilization of oil palm trunk (OPT) fiber as the primary material for thermal insulation shows promise. This study aims to determine the specific attributes of OPT fiberboard that make it suitable for use as a thermal bio-insulator. The features examined encompass physical, mechanical, thermal, and fire-resistant attributes. The OPT fiber underwent a treatment process involving boiling at a temperature of 80℃ for a duration of 30 minutes. The fiberboard is manufactured using epoxy adhesive and calcium carbonate additive, and then printed using the hand lay-up process and cold-compaction technique. The physical characteristics of fiberboard indicate that there is a direct relationship between its density and water absorption.  Testing revealed that fiberboard has a low thermal conductivity and high heat capacity value. By including calcium carbonate, the burning time of the fiberboard was tested and seen to decrease, indicating a delay in the fiberboard burning process, as evidenced by the extended flame suppression time. The density of OPT fiberboard varies between 0.48 and 0.70 gr/cm3. The absorbency of water is inversely related to its density. Water absorption capacity generally rises with decreased density. The obtained heat capacity value is 1.28-2.38 J⁄(g℃). The mechanical value ranges from 1.00 to 3.55 MPa. The incorporation of calcium carbonate significantly impacts the thermal and mechanical characteristics of the fiberboard. The produced OPT fiberboard satisfies the requirements for good thermal, physical, and mechanical characteristics, making it a suitable bio-insulation material for buildings.
Biokomposit Papan Partikel diperkuat Serat Alam Sabut Kelapa dan Tempurung Kelapa dan matriks epoksi Ginting, Delovita; Syahputra, Romi Fadli; Jannah, Wirdatul
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 1 (2023): June
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i1.18375

Abstract

Natural fiber particle board (biocomposite) can be used as an alternative to conventional materials because it is environmentally friendly, a renewable source and is naturally biodegradable. This research presents a study on the mechanical and physical characterization of natural fiber reinforced polymer particle board, namely coconut coir and coconut shell. The fixed variable in this study was the number of matrix fractions, namely epoch resin. The variable mass fraction of the particle board in this study was coconut coir:coconut shell:epoxy was PP1 (30:0:70), PP2 (22,5:7,5:70), PP3 (15:15:70), PP4 (7,5:22,5:70), and PP5 (0:30:70). Particle board was tested for flexibility using the Universal Testing Machine referring to ASTM D 7-90-03, the impact toughness of the samples using the Impact Tester machine referring to ASTM D 6110. The samples were tested for density and thickness expansion referring to SNI 03-2105-2006. The results of the sample testing showed that the optimum density value for the PP3 sample was 1.05 g/cm3 for the reinforced coconut coir and coconut shell samples. The test results for the optimum impact toughness test value on the PP5 sample were 3.20 J/cm2 and the test results for the optimum flexural strength test value on the PP5 sample were 382.29 Kgf/cm2 with the coconut shell reinforced sample.
Fabrikasi Papan Serat Tandan Kosong Kelapa Sawit dengan Penambahan Bahan Fluoresensi Fosfor Husna, Ropiqotul; Yana, Debi; Kusmawati, Intan; Aisah, Nurul; Ginting, Delovita; Syahputra, Romi Fadli
JMPM (Jurnal Material dan Proses Manufaktur) Vol. 7 No. 2 (2023): December
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jmpm.v7i2.19615

Abstract

Natural fiber can be used as a substitute for environmentally friendly composite materials. Oil palm empty fruit bunches (OPEFB) is one of the natural fibers processed by the palm oil industry which is available in large quantities. The use of OPEFB fiber as an innovative fiberboard has not been studied much physically. The addition of fluorescence additives gives wood and fiberboard products the advantage of having a high aesthetic value. The aim of this study was to fabricate an innovative fiberboard biocomposite based on OPEFB fiber with the addition of phosphor fluorescence. Fiberboard is fabricated by hand lay-up and cold compaction methods. The main composition of the fiberboard consists of OPEFB fiber, epoxy resin, and 5 g of phosphorus powder. The fiber content of OPEFB varies from 76% to 86%. The results of physical testing showed that the fiberboard density ranged from 0.34 -0.59 g/cm³ and its water absorption capacity was 105.22 -156.475%. The specific heat capacity value of fiberboard ranges from 0.34 -2.2 J/g ̊C and its thermal conductivity is 0.001-0.002 W/mK. Meanwhile, the bending strength is 1.30 –6.42 MPa which is relatively comparable to bio-composite fiberboard. The addition of phosphorus affects the thermal properties of fiberboard, so it is suitable for application as a bio-insulator with fluorescence features.
Evaluasi Kinerja Elektrokimia Katoda LiFePO4 dengan Variasi Aditif Graphene Oxide, Reduced Graphene Oxide dan Koloid Nanopartikel Perak (AgNP) Agun Pranata; Delovita ginting; Romi Fadli Syahputra
Jurnal Teori dan Aplikasi Fisika Vol. 14 No. 01 (2026): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v14i01.558

Abstract

The low electronic conductivity of Lithium Iron Phosphate (LFP) cathodes presents a major challenge for their application in lithium-ion batteries. This research aims to enhance the electrochemical performance of LFP by comparing the effects of three different conductive additives: Graphene Oxide (GO), reduced Graphene Oxide (rGO), and a Silver Nanoparticles (AgNP) composite. GO was synthesized from graphite powder via a modified Hummers’ method, followed by the fabrication of three cathode variations. Material characterization was performed using X-Ray Diffraction (XRD), UV-Diffuse Reflectance Spectroscopy (UV-DRS), and Cyclic Voltammetry (CV). XRD analysis confirmed the successful synthesis of GO, evidenced by the shift of the main diffraction peak from 26.24° in graphite to 9.80° in GO. Band gap (Eg) analysis from UV-DRS data showed that the addition of rGO and the AgNP effectively reduced the Eg value to 2.91 Ev and 2.73 Ev, respectively, from the initial value of 3.10 Ev for the LFP+GO sample. Electrochemical tests indicated that the LFP+rGO cathode exhibited the most significant current response, achieving the highest specific capacitance of 5.0 F/g at a scan rate of 5 Mv/s. These results confirm that rGO is the most effective additive among the three variations for enhancing the electrochemical properties of LiFePO4 cathodes. Keywords: LiFePO₄, Graphene Oxide, Reduced Graphene Oxide, Silver Nanoparticles, Specific Capacitance.  
EFEKTIVITAS ADSORBEN LIMBAH AMPAS KOPI PADA LIMBAH CAIR KELAPA SAWIT Putra, Rendy Pratama; Ginting, Delovita; Syahputra, Romi Fadli
JOURNAL ONLINE OF PHYSICS Vol. 11 No. 2 (2026): JOP (Journal Online of Physics) Vol 11 No 2
Publisher : Prodi Fisika FST UNJA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22437/jop.v11i2.53154

Abstract

Limbah cair pabrik kelapa sawit (Palm Oil Mill Effluent/POME) memiliki kandungan bahan organik yang tinggi, yang tercermin dari nilai Chemical Oxygen Demand (COD), sehingga berpotensi menimbulkan pencemaran lingkungan apabila tidak diolah secara memadai. Penelitian ini bertujuan untuk mengevaluasi kemampuan adsorben berbasis limbah ampas kopi dalam menurunkan COD POME serta mengkaji kinetika adsorpsinya. Proses adsorpsi dilakukan secara batch dengan variasi waktu kontak 35–95 menit. Karakterisasi adsorben dilakukan menggunakan Fourier Transform Infrared Spectroscopy (FTIR) untuk mengidentifikasi gugus fungsi dan Scanning Electron Microscopy (SEM) untuk mengamati morfologi permukaan. Analisis kinetika adsorpsi difokuskan pada model Elovich, Bangham, dan Boyd untuk menilai kesesuaian model terhadap data eksperimen. Hasil penelitian menunjukkan bahwa adsorben ampas kopi mampu menurunkan COD POME dengan efisiensi maksimum 13,13% dan kapasitas adsorpsi 2,8604 mg/g pada waktu kontak optimum 65 menit. Di antara model yang diuji, model Bangham memberikan kecocokan terbaik, sedangkan model Boyd menunjukkan kesesuaian yang sangat rendah. Temuan ini menunjukkan bahwa adsorben limbah ampas kopi berpotensi digunakan sebagai adsorben alternatif, tetapi masih memerlukan optimasi lebih lanjut sebelum diterapkan pada skala yang lebih luas.
Utilization of phase changing materials as air conditioning alternatives in eco-green systems Nurfi Hikma; Ade Fitri; Ramy Fitrah Izzah; Romi Fadli Syahputra; Zulkarnain Zulkarnain
Science, Technology, and Communication Journal Vol. 2 No. 3 (2022): SINTECHCOM Journal (June 2022)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v2i3.5

Abstract

Prevention of global warming due to high energy consumption and greenhouse gases is a priority for local governments, especially in Pekanbaru City, Indonesia. The use of air conditioning has become a community habit of reducing the temperature of a hot room, but unexpected things can have a negative impact on the surrounding environment. Therefore, this paper provides a simple new idea by using a phase change material (PCM) in the form of an eco-green air cooler system (EGACY) application as a free and passive cooler. EGACY consists of salt hydrates, PCM boxes, iron pipes, fans, solar panels, and batteries as the main components and several other supporting components. The EGACY system works by absorbing cold air and stored by the PCM at night through pipes connected to the outside, then expelled during the day through indoor ceiling vents. The resulting temperature in the room can be controlled at a comfortable temperature from 25°C to 28°C. EGACY is believed to be able to provide the potential for environmentally friendly technology with renewable energy sources.
Design and testing of circular metamaterial-based salinity sensors Yona Purnama Rezki; Romi Fadli Syahputra; Delovita Ginting
Science, Technology, and Communication Journal Vol. 3 No. 3 (2023): SINTECHCOM Journal (June 2023)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v3i3.234

Abstract

The salinity sensor is a salt level detection tool designed based on the electrical properties of water. The salinity sensor consists of two electrodes that are dipped in water where the sensor is given a potential difference so that electrons flow in the sensor-building circuit. The electrode is connected to a variable resistor which forms a voltage divider circuit connection. This research aims to design a metamaterial (MTM) sensor to detect salt levels in the 100 – 900 MHz range and investigate the performance of MTM sensors for detecting salt levels. The working MTM sensor design has been successfully designed and tested, where the MTM sensor is also able to differentiate frequency values from samples with different salt levels.
Co-Authors -, Yeeri Badrun Ade Fitri Adila Fitri Yani Yani Agun Pranata Ahmad Nurhuda Aisah, Nurul Andika Thoibah Andri Saputra Anggraini, Wresni Anggreani, Selvia Anita, Sofia Ariyani Ayu Risti Candini Basdyo, Doni Candini, Ayu Risti Dadang Syarif Sihabudin Sahid Dalimunthe, Latipa Hannum Dedi Irawan Dedi Irawan Defrianto Defrianto Delovita Ginting, Delovita Dino Yanuardi Doni Basdyo Elsie Erman Taer Fahturrahman, Fauzan Haryana bin Mohd Hairi Haryana Hairi Haryana Hairi Herlina, Noftripa Husna, Rofiqotul Husna, Ropiqotul Ismail, Noor Maizura Ismaliyah, Dhea ISRAWATI HARAHAP Iwantono Iwan Barnawi Khaikal Ramadhan Kusmawati, Intan Lailatul Munawaroh Laras Sita Widara Leli Nurhamiyah Lestari, Dinda Lubis, Viviana Mesra Sania Moh Danil Hendry Gamal Moh Danil Hendry Gamal Mubarak Mubarak Neneng Fitrya Nopripa Herlina Novia Gesriantuti Nurfi Hikma Nurhamiyah, Leli Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa Okfalisa, Okfalisa Piza Piza Piza, Piza Putra, Rendy Pratama Rachmawati Rachmawati Rahmadani, Nofia Ramy Fitrah Izzah Retnawaty, Sri Fitra Riad Syech Ridho Kurniawan Rifardi Rina Amelia Rismadani Haryanti Roby Ikhsan Ros Meri S. P. Dewi Saktioto Saktioto Sasmita Sasmita Shabri Putra Wirman Sri Fitria Retnawaty Sri Mulyani Syamsudhuha Syamsudhuha Tri Adelia Vepy Asyana Viviana Lubis Viviana Lubis Wahyu Candra Welly, Indah Sri Wirdatul Jannah wirdatul jannah Wresni Anggraini Wulandari, Surya Yan Soerbakti Yan Soerbakti Yan Soerbakti Yan Soerbakti Yana, Debi Yani, Adila Fitri Yeeri Badrun Yoli Zairmi Yona Purnama Rezki Yulia Fitri Yulia Fitri Yunita I. Lubis Zairmi, Yoli Zamri Zamri Zulkarnain Zulkarnain