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All Journal International Journal of Applied Power Engineering (IJAPE) Bulletin of Electrical Engineering and Informatics Elkawnie Science and Technology Indonesia Journal of Applied Geospatial Information Jurnal Penelitian Sains INDONESIAN JOURNAL OF APPLIED PHYSICS Indonesian Journal of Chemistry Eksakta : Berkala Ilmiah Bidang MIPA Hydrogen: Jurnal Kependidikan Kimia Journal of Technomaterial Physics International Journal of Social Service and Research Multidiciplinary Output Research for Actual and International Issue (Morfai Journal) Prisma Sains: Jurnal Pengkajian Ilmu dan Pembelajaran Matematika dan IPA IKIP Mataram Jurnal Rekayasa Energi Journal of Engineering and Technological Sciences Journal of Computation Physics and Earth Science
Syahrul Humaidi, Syahrul
Department Of Physics, Faculty Of Mathematics And Natural Sciences – Universitas Sumatera Utara, Medan
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Synthesis and Characterization of Cu-Cr-O Phase with H2SO4 Solvent Using Sol-Gel Method Rangkuti, Yusridah; Humaidi, Syahrul; Maulid, Nurul; Imaduddin, Agung; Herbirowo, Satrio; Nugraha, Heri; Darsono, Nono
Journal of Technomaterial Physics Vol. 5 No. 1 (2023): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v5i1.10897

Abstract

This study used the cast-in-situ method to make concrete based on rice husk ash and pineapple leaf fiber. Rice husk ash and pineapple leaf fiber were used as the cement substitutes with different variations: 0%, 2.5%, 5%, and 7.5%. Parameters examined in this study included density, porosity, water absorption, flexural strength, and compressive strength using a universal testing machine and Material Testing equipment, which were then analyzed morphologically using SEM-EDX. The result showed a density of  2.510 × 103 − 2.451 × 103 kg/m3, porosity of 7.64 – 5.73 %, water absorption of 0.296 % – 0.243 %, compressive strength of 23.66 – 16.45 MPa, flexural Strength of 33.3 – 25.3 MPa. The morphological analysis showed that the rice husk ash and pineapple leaf fiber addition was responsible for the concrete's porous structure in this study has a porous structure. The EDX analysis result exhibited a high carbon percentage.
Electrochemical Performance of Na2Mn3O7 as a Cathode Material in Sodium-Ion Batteries Using the Precipitation Method with Ethylene Glycol Chelating Agent Subhan, Achmad; Sulaiman, Muhammad Thariq As; Humaidi, Syahrul
Journal of Technomaterial Physics Vol. 6 No. 1 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i1.13867

Abstract

Tests were conducted on Na2Mn3O7 as a cathode material in sodium-ion batteries, aiming to synthesize Na2Mn3O7 precursor using commercial and synthetic MnCO3 variants. Sample A utilized commercial MnCO3, while sample B utilized MnCO3 synthesized from MnSO4.1H2O and Na2CO3. Both variants were mixed with Na2CO3 to form Na2Mn3O7 precursor, which was then sintered at 700°C for 4 hours, ground, and sieved. A slurry was prepared by mixing the active materials PVDF: Super P in an 8:1:1 ratio with 3.5 mL of NMP. Sample A exhibited a conductivity of 3.4706×10-7 S/cm, and sample B had a conductivity of 2.7304×10-7 S/cm in the EIS results. In the CV test, sample A showed oxidation and reduction peaks at 2.77 V and 1.62 V, respectively, while sample B had peaks at 2.842 V and1.716 V. In the CD test, sample A reached maximum and minimum peaks of 4.3 V and 1.4 V, while sample B reached peaks of 4.2 V and 1.3 V. Sample A exhibited a capacity of 117.02 mAh/g on charge and 93.47 mAh/g on discharge, whereas sample B showed capacities of 79.17 mAh/g on charge and 65.79 mAh/g on discharge. These results indicate the superior performance of sample A over sample B.
Distance Measurement of Low Reflectance Objects Using Indirect Time of Flight LiDAR Agitta Rianaris; Nofriha Rahmayani Siregar; Hari Pratomo; Surip Kartolo; Syahrul Humaidi; Dwi Hanto
Journal of Technomaterial Physics Vol. 6 No. 2 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i2.16988

Abstract

Remote sensing is a system that enables data collection without physical contact with the object or its environment. Light detection and Ranging (LiDAR) technology is increasingly important in various industries, particularly developing autonomous vehicles. In autonomous vehicle applications, LiDAR is expected to detect multiple objects from high and low reflectance to make it easy to recognize its surrounding area. We have designed a biaxial LiDAR range finder system based on indirect time of flight technology, which has been tested to measure the distance of an object with high reflectance. In this work, we employ the system to measure the distance of an object with low reflectance from High Impact PolySterene (HIPS). The results show that the systems can measure objects from HIPS up to 33 m, which is lower than when the system measures an object with high reflectance.
Fe2O3 Review: Nanostructure, Synthesis Methods, and Applications Novita, Novita; Ramlan, Ramlan; Naibaho, Marzuki; Ginting, Masno; Humaidi, Syahrul; Duma, Tulus Na
International Journal of Social Service and Research Vol. 4 No. 02 (2024): International Journal of Social Service and Research (IJSSR)
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v4i02.728

Abstract

Iron sand, which contains magnetite iron ore, exhibits unique magnetic properties when exposed to magnetic fields. Iron ore content, including ?-Fe2O3, FeTiO3, Magnetite (Fe3O4), and others, provides potential uses in various industries such as electronics, energy, chemical, ferrofluids, catalysts, and biomedicine. The location of the discovery of iron sand can affect its mineral characteristics and geological conditions. This research aims to develop innovative synthesis methods to produce hematite nanomaterials from iron sand. Nano-size hematite nanoparticles exhibit unique characteristics, including an increase in specific surface area that is beneficial in applications such as gas sensors, catalysts, lithium-ion batteries, and the manufacture of permanent magnets. Through a literature review, this article presents comprehensive insights into the characteristics of iron sand, variations in synthesis methods, and the structure of hematite nanoparticles. Applications of hematite nanoparticles in water treatment, catalysis, and energy storage are also detailed. This article is expected to contribute to the development of innovative nanomaterial technologies as well as explore the potential of iron sand resources for wider industrial applications.
PREPARASI DAN MODIFIKASI SIFAT ADHESI PERMUKAAN METAL FOAM UNTUK MENINGKATKAN KARAKTERISTIK ADHESI Humaidi, Syahrul; Suharlan, Didy
JURNAL REKAYASA ENERGI Vol. 3 No. 1 (2024): Jurnal Rekayasa Energi
Publisher : Politeknik Negeri Indramayu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31884/jre.v3i1.49

Abstract

Permukaan metal foam telah berhasil dimodifikasi sehingga mendapatkan permukaan dengan sifat adhesi yang tinggi dengan sudut kontak sebesar 112° pada hari pertama pengamatan. Modifikasi permukaan metal foam dilakukan melalui prosedur pembersihan dan teknik penyemprotan sederhana menggunakan Super Nano hydrophobic Liquid Repellent. Tujuan utama dari penelitian ini adalah untuk mengeksplorasi pengaruh lapisan hidrofobik pada permukaan metal foam terhadap karakteristik kapilaritas yang dimiliki. Metal foam yang dilapisi dengan lapisan hidrofobik menyerap 0,03 gr air dalam 10 detik pertama, kondisi ini berlanjut untuk 50 detik berikutnya dan setelah 90 detik, pemompaan kapiler mencapai titik saturasi di mana jumlah air yang telah mengisi celah kapiler tidak dapat bergerak lagi karena jumlahnya telah mencapai maksimum. Dari penelitian ini juga diproleh kesimpulan bahwa semakin kecil sudut kontak metal foam, maka semakin meningkatkan tekanan kapilernya.
Characterization of Barium Hexaferrite and Iron Sand as Microwave Absorbing Materials Naibaho, Yeni P.S; Humaidi, Syahrul; Rianna, Martha; Diana, Linda
Hydrogen: Jurnal Kependidikan Kimia Vol 12, No 2 (2024): April-May 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/hjkk.v12i2.11776

Abstract

This research aims to analyze the characteristics of Barium Hexaferite and iron sand as microwave absorbing materials, their influence on microwave absorption properties, and the frequency range of waves produced by these materials. The research method used is the Co-Precipitation method. Dissolve barium hexapherite and iron sand in distilled water with the appropriate mass ratio. The results of this study show that the synthesis of iron sand and barium hexapherite material produces a single phase material. The single phase material is shown through X-ray diffraction pattern data, namely iron sand and barium hexapherite, namely hematite and barium hexapherite. Iron sand and barium hexapherite materials are characterized using EDS which shows a composition that is close to stoichiometry. Observations using VNA show that iron sand and barium hexapherite materials are able to absorb electromagnetic waves at a radar wave frequency of 11.1 GHz, which is -25.64 dB.
Exploring Synergies: Tailoring Electrical Conductivity in Novel Corn Starch and Natural Rubber Polymer Composites through Varied Carbon Additives Fiqri, Miftahul; Humaidi, Syahrul; Frida, Erna; Estananto, Estananto
EKSAKTA: Berkala Ilmiah Bidang MIPA Vol. 25 No. 02 (2024): Eksakta : Berkala Ilmiah Bidang MIPA (E-ISSN : 2549-7464)
Publisher : Faculty of Mathematics and Natural Sciences (FMIPA), Universitas Negeri Padang, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/eksakta/vol25-iss02/500

Abstract

Conductive polymer composites were synthesized using a crosslinking method, enhancing conductivity through the incorporation of carbon additives. Non-conductive natural polymers, corn starch, and natural rubber were blended with carboxymethyl cellulose (CMC) as a crosslinking agent, enhancing polymer bonding. CMC also served as a compatibilizer, improving corn starch properties. Glycerol acted as a plasticizer, enhancing flexibility and processability. Addition of carbon nanotube (CNT), graphite, and carbon foam yielded low-density materials, with carbon foam providing optimal porosity. The crystalline properties mirrored the added conductive carbon, while the chemical structure remained unchanged. At 0.1 Hz, electrical conductivity varied: 1.192 x 10-7 S.cm-1 (no carbon), 6.123 x 10-4 S.cm-1 (CNT), 7.656 x 10-4 S.cm-1 (graphite), and 3.134 x 10-2 S.cm-1 (carbon foam). Graphite incorporation demonstrated an electrical conductivity of 7.838 x 10-4 S.cm-1. The introduced carbon additives facilitated a conductive pathway in corn starch-based polymer composites, elevating material conductivity.
Overcurrent effects on copper insulated PVC cables and fire resistance via thermal imaging and macrostructure analysis Ali Akbar, Muhammad; Humaidi, Syahrul; Tarigan, Kerista; Ramdan, Dadan; Frida, Erna; Siregar, Yulianta
Bulletin of Electrical Engineering and Informatics Vol 14, No 2: April 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eei.v14i2.8628

Abstract

This study investigates the effects of overcurrent on copper (Cu) insulated polyvinyl chloride (PVC) cables, focusing on their thermal behavior and fire resistance. We utilized thermal imaging, macrostructural analysis, and Joule heating calculations to evaluate six cable samples subjected to various currents. Results showed that with increasing current, the temperature of the cables rose significantly. For example, the CC0 sample, with no current, had a temperature of 36 °C, while the CC110 sample, subjected to 110 A, reached 1,091 °C. Joule heating calculations indicated energy values ranging from 0 J for the CC0 sample to 7,260,000 J for the CC110 sample. Physical observations included minor deformations at 253 °C and complete insulation loss at 1,091 °C. These findings emphasize the critical need for managing overcurrent to prevent severe cable damage and enhance system safety. This research provides practical insights for optimizing cable design and improving thermal management, offering valuable contributions to electrical engineering practices.
Prakiraan Suhu Rata-rata Berdasarkan Stasiun Deli Serdang Menggunakan Model Long Short-Term Memory Junaedi, Ilham; Paramita, Endah; Sinaga, Nora Valencia; Wahyuni, Sri; Humaidi, Syahrul
Journal of Computation Physics and Earth Science (JoCPES) Vol 1 No 1 (2021): Jurnal Fisika Komputasi dan Ilmu Kebumian
Publisher : Yayasan Kita Menulis - JoCPES

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53842/3nqxkj30

Abstract

An understanding of designs and gage of typical temperature joined of parameter climate and climate data for better water resource organization and orchestrating amid a bowl is uncommonly imperative. Examine climate designs utilizing ordinary and neighborhood every year typical temperatures, compare and make discernments. amid this consider, we'll analyze adjacent and conventional typical temperature data in 96031 Station backed recognition station input. the preeminent objective of this considers to appear the execution of the conventional temperature in an exceedingly single station and to predict the ordinary temperature data utilizing the Long memory Illustrate approach. bolstered the comes about of standard informatics of exploring temperature with adjacent temperature relationship, we got the appear of preparing bend, remaining plot, and thus the diffuse plot is showed up utilizing these codes. the decent execution of 96031 Station had a Mean Squared Error esteem of 0.01 and R squared esteem 0.98, concerning zero will speak to superior quality of the indicator.
Analysis of Strong Wind Characteristics Using Doppler Weather Radar over Kualanamu Airport Indonesia Manurung, Ellya Veronika Iriani; Humaidi, Syahrul; Darmawan, Yahya
Journal of Applied Geospatial Information Vol. 8 No. 1 (2024): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v8i1.7592

Abstract

Strong wind is one of the weather phenomena that can be dangerous for aviation safety. According to observation data from the Kualanamu Meteorological Station, there were 61 strong winds with speeds greater than or equal to 15 knots in 2020, which indicates a high risk of strong wind over this area. This research aims to analyze the characteristics of strong winds in the Kualanamu airport area using weather Doppler radar. The data used consisted of nine cases of the strongest winds for each month in 2020. We have tested analysis methods of radar products such as VVP, CAPPI V, and PPI on nine sample dates to determine the duration, intensity, and direction of wind speed. Additionally, we used the radar's echo pattern to identify the potential impact of cumulonimbus clouds (Cb), which trigger strong winds. Three out of nine study cases, identified as the three most significant strong winds during 2020, have been subjected to echo pattern analysis. The results showed that the strong winds occur for 40 to 70 minutes, but they mostly have a duration of about 50 minutes. Overall, strong winds occurred during the night and early morning. The radar echo typically has a range between 18 and 43 dBZ. Echo patterns generally revealed a group that extended in the shape of a squall line that moved from west to east and reversed.
Co-Authors Abdulmajid, Muhammad W. Achmad Subhan Achmad Subhan Aditia Warman Agitta Rianaris Agung Imaduddin, Agung Aldira, Syarah Alfonsius Chrisandy Pratama Siregar Aliakbar, Muhammad Amri, Fauzan Andrean Simanjuntak Andrean V.H Simanjuntak Armelia Yuniani Averroes Fazlur Rahman Piliang Bonardo, Doli Dadan Ramdan Delviya Amisha Diana Alemin Barus Diana, Linda Diana, Linda E. Dinda Amilia Duma, Tulus Na Dwi Hanto Endah P. Sari Erna Frida Estananto Fathi Marzuqi Fiqri, Miftahul Fynnisa Zebua Hari Pratomo Heri Nugraha Herri Trisna Frianto, Herri Trisna Hibatullah, Khindi Aufa ilham junaedi Imaddudin, Agung Kerista Sebayang Liza, Erliza Pratiwi Maghfirah, Awan Manurung, Ellya Veronika Iriani Manurung, Royston Marhaposan Situmorang Marhaposan Situmorang, Marhaposan Martha Rianna Marzuki Sinambela Masno Ginting Maulid, Nurul Moraidah Hasanah Muhammad Ali Akbar, Muhammad Ali Muliyati, Muliyati Naibaho, Marzuki Naibaho, Yeni P. S. Naibaho, Yeni P.S Nofriha Rahmayani Siregar Nono Darsono, Nono Novita Novita Nurdin Bukit Paramita, Endah Perdinan Sinuhaji Perdinand Sinuhaji Rahmadsyah Rahmadsyah Ramlan, H. Rangkuti, Yusridah Resa Idha Rifai, Abdulloh Rizki Fadhillah Pratama Putra Saharman Gea Sally Irvina Ritonga Santoso, Bayu Santy Meilisa Manurung Saragih, Dearninta A. P. Saragih, Immanuel Jhonson A. Satrio Herbirowo, Satrio Sihotang, Bertalina Simanjuntak, Andrean V. H. Simanjuntak, Renaldo Simbolon, Tua Raja Sinaga, Nora Valencia Siregar, Shinta Marito Sri Wahyuni Suharlan, Didy Sulaiman, Muhammad Thariq As Surip Kartolo Susilawati Susilawati Susilawati Tarigan, Kerista Theresia Grefyolin Simbolon Timbangen Sembiring Titik Lestariningsih, Titik Tulus Ikhsan Nasution Umar Muksin Yahya Darmawan Yahya Darmawan Yahya Darmawan Yoshephin Romania Yulianta Siregar Yusran Asnawi Zuriah Sitorus