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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 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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1-Dimensional Model of Seismic Velocity after Tarutung Earthquake 1 October 2022 Mw 5.8 Resa Idha; Endah P. Sari; Yusran Asnawi; Andrean V.H Simanjuntak; Syahrul Humaidi; Umar Muksin
Journal of Applied Geospatial Information Vol 7 No 1 (2023): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v7i1.5662

Abstract

On October 1, 2022, an earthquake with a magnitude (M) of 5.8 occurred in the Tarutung region, Indonesia and was associated with an active fault at a depth of 10 km. The earthquake fault with dextral mechanism is suitable with the pattern of active fault movement in Sumatra in the Northeast - Southwest direction. A total of 170 aftershocks occurred within a week span with magnitude variations of 1.7 – 4.0. In addition, the Tarutung earthquake was felt by the local peoples with an intensity of IV - VI MMI and caused 1 fatality, 25 injuries, and around 900 houses were damaged. Therefore, this study studies the characteristics of seismicity and damage caused by finding an appropriate 1-Dimensional seismic velocity model. The obtained 1-Dimensional speed model has varying values at a depth of 10 km with a speed of ~5.5 km/s and 30 km with a speed of ~7 km/s. The 1-D velocity model obtained has a convergent and unique solution with an RMS value < 1.0. Based on ground motion analysis after relocation, it was found that the high PGA and PGV values were in Tarutung. The PGA results reveal a high percentage value of >10% in Tarutung. This is consistent with the damage data and at the same time confirms that Tarutung is in a seismically active area.
Faulting Mechanism of Tarutung Earthquake 2022 Mw 5.8 Using Moment Tensor Inversion Endah P. Sari; Resa Idha; Yusran Asnawi; Andrean Simanjuntak; Syahrul Humaidi; Umar Muksin
Journal of Applied Geospatial Information Vol 7 No 1 (2023): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v7i1.5663

Abstract

On October 1, 2022, an earthquake with a magnitude of 5.8 shook the Tarutung area which was generated by an active fault at a shallow depth of 10 km. In this study, relocating the hypocenter and determining the mechanism of the earthquake was carried out to understand the active tectonic structure. The distribution of hypocenter relocation figures a pull-apart pattern at shallow depths. The earthquake mechanism shows a dextral pattern in the Southwest – Southeast direction with a strike of 138º – 158º. The aftershocks are more dominantly distributed in the pull-apart system in the southeastern part and show the greater part of the transfer of seismic static stress to the southeastern side of the Toru fault. The pull-apart tectonic system scheme in the Tarutung basin with secondary faults as extensional faults is proposed to be a fault source model that forms a negative-flower structure geological pattern. The results of this study can be used as a reference for the Tarutung tectonic system and applied as a mitigation study.
Synthesis and Electrochemical Characterization of Sodium-Ion Battery Anode Carbon Biomassa Based on Sunflower Seed Husk (Helianthus annuus) Simanjuntak, Renaldo; Dinda Amilia; Syahrul Humaidi; Achmad Subhan
Journal of Technomaterial Physics Vol. 5 No. 2 (2023): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v5i2.12394

Abstract

This study aimed to synthesize materials from the carbon biomass of sunflower seed husk (Helianthus Annuus) for sodium ion battery anode. A simple carbonization process was carried out by roasting. The chemical activation process was conducted by adding KOH as much as 4M in 100 mL water solution for 20 hours. Then drying was done in the oven at a temperature of 100ºC for 20 hours, and then continued with the sintering process at a temperature of 900ºC for 2 hours. The sintered results were washed and hydrothermal for 20 hours at 200ºC with 4 mL H2O2 and 1 mL EG in 50 mL Teflon. The resulting acid degree was neutralized (pH ~ 7) with distilled water and then dried at 100ºC for 20 hours. The hydrothermal powder was pulverized using a mortar and pestle and then sieved on a 325 mesh sieve. Anode sheets were prepared by mixing active ingredients: PVDF: Super-P with a composition of 85: 10: 5 by adding 2 ml of DMAC solvent. Electrochemical characterization testing was carried out to see the resulting performance—the results obtained from EIS, CV, and CD show that commercial hard carbon is better.
Palm Oil Fuel Ash and Fly Ash for a Partial Replacement of Cement in High-Quality, Environmentally Friendly Mortar as a Solution to Industrial Waste Siregar, Shinta Marito; Humaidi, Syahrul; Bukit, Nurdin; Frida, Erna
Science and Technology Indonesia Vol. 9 No. 1 (2024): January
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.1.59-68

Abstract

This study explores the effects of incorporating palm oil fuel ash (POFA) and fly ash (FA) as partial cement substitutes on the mechanical properties and characteristics of high-quality mortar, specifically Engineered Cementitious Composites (ECC). ECC mortar was fabricated by milling POFA waste and FA through a top-down method utilizing a ball mill. The resulting material was subjected to tests for slump flow, water absorption, compressive strength, and characterized through XRF, FTIR, SEM/EDX, and XRD analyses. FTIR analysis verified the existence of Si-O and Al-O groups within the composite made of POFA-FA ECC. XRF analysis of FA and POFA showed cementitious properties, with SiO2+Al2O3+Fe2O3 exceeding 50% and CaO surpassing 10%. SEM and XRD results indicated minimal cavity formation, suggesting a high compressive strength in the mortar. Particle size distribution analysis revealed prevalent particles in the 1.5×10−1 to 2.0×10−1 μm range. The compressive strength test after 28 days, incorporating 15% FA and 10% POFA, yielded the highest strength at 59.30 MPa. The water absorption values ranged from 1.25% to 2.67%, indicating that POFA-FA assists in the cement hydration process and also serves as a filler. As a result, the material’s density is very high, leading to fewer voids formed, thus reducing the trapped water, which significantly affects the mortar’s strength.
Electromigration Effects in Overcurrent PVC-Insulated Copper Wire: Failure and Deformation Impacts Akbar, Muhammad Ali; Tarigan, Kerista; Humaidi, Syahrul; Ramdan, Dadan; Siregar, Yulianta
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.3.735-744

Abstract

Electromigration is a critical issue in materials science and electrical engineering, significantly impacting the reliability and efficiency of electrical systems. This study investigates the electromigration behavior of PVC-insulated copper wires under various overcurrent conditions, focusing on material degradation and electrical performance. Copper cables, identified as 046620.3 Eterna CU/PVC 1.5 mm2, were subjected to currents ranging from 0 to 110 A. The mean time to failure (MTTF) was calculated using Black’s equation, revealing a sharp decline in MTTF with increasing current density. Surface morphology analysis using SEM showed the formation of voids and hillocks at higher currents, indicating severe electromigration damage. XRF analysis demonstrated significant changes in the elemental composition, particularly a reduction in copper content and an increase in chlorine and other elements, suggesting degradation of the PVC insulation. FTIR spectroscopy revealed substantial chemical changes in the PVC material, especially under extreme overcurrent conditions, highlighting dehydrochlorination and carbonyl group formation. There is a clear relationship between overcurrent conditions and electromigration phenomena, as evidenced by the observed damage to surface morphology, changes in elemental composition, and alterations in the chemical structure of PVC. The mechanisms and causes of electromigration are explained comprehensively in this work, illustrating how increased overcurrent accelerates the electromigration process, leading to the formation of voids and hillocks in the copper conductor. This damage is accompanied by a significant reduction in copper content and an increase in chlorine levels, indicating the degradation of PVC insulation. FTIR spectra further confirmed these findings by showing chemical changes such as dehydrochlorination and carbonyl group formation under high current stress. The MTTF values reflect the severity of these impacts, with samples exposed to higher currents showing drastically reduced lifespans. For instance, samples subjected to 100 A and 110 A currents exhibited MTTF values of 0.2 minutes and 0.004 minutes, respectively.
Design and Development of A Digital Soil Temperature Monitoring System Based on The Internet of Things at North Sumatra Climatological Station Manurung, Royston; Nasution, Tulus Ikhsan; Humaidi, Syahrul; Saragih, Immanuel Jhonson A.; Hibatullah, Khindi Aufa; Situmorang, Marhaposan; Darmawan, Yahya
Journal of Applied Geospatial Information Vol 7 No 2 (2023): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30871/jagi.v7i2.6545

Abstract

Soil temperature is a crucial parameter in monitoring and understanding climate and soil ecosystems. It plays a vital role in various environmental aspects, including agriculture, ecology, and geoscience. Monitoring soil temperature is necessary for planning and managing agriculture and natural resources. Currently, temporal observations of soil temperature by BMKG are limited, conducted only at 07:55, 13:55, and 18:55 local time. This limitation makes it difficult to perform detailed soil temperature analysis. This research was conducted to design a digital soil temperature monitoring device accessible via the internet. Seven DS18B20 sensors were used at depths of 0 cm, 2 cm, 5 cm, 10 cm, 20 cm, 50 cm, and 100 cm, combined with an ESP8266 module using the Arduino system. The implementation of this design resulted in a real-time soil temperature monitoring system with data updates every 10 seconds. The observed data are displayed on a 20x4 LCD and sent to the cloud, making them accessible on the webpage http://monitoringsuhutanah.my.id. Calibration results indicate that the DS18B20 sensors used in this study provide accurate and consistent temperature measurements, with an average correction range of (-0.20) to 0.24, thus suitable for operational use. Field tests show that the digital data are accurate and correspond (linearly correlate) with conventional data. This is based on a correlation value of 0.7, while the RMSE values range from 0.5 to 2.18 and the bias ranges from (-0.69) to 0.08.
XRD Analysis of Li4Ti5O12 with Post Heat Treatment for Lithium-ion Capacitor (LIC) Applications Humaidi, Syahrul
Journal of Technomaterial Physics Vol. 4 No. 1 (2022): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v4i1.8154

Abstract

Characterization of XRD-analysis on Li4Ti5O12 with post heat treatment for applications Lithium-ion Capacitor (LIC) has been conducted. The powder method was used in the analysis, whereas the samples were prepared using the sol-gel method. The anode material Li4Ti5O12 precursor was sintered at 850°C for 4 hours and followed by heat-treatment at 600oC for 3 hours. Characterization of structural (XRD analysis) was applied to determine the formation of Li4Ti5O12 phase. The results of the characterization were formed Lithium titanate (Li4Ti5O12) and rutile phase (TiO2) with crystallite size on LTO I of 82.52 nm and LTO II of 92.07 nm. Overall, post heat treatment of anode Li4Ti5O12 succeeded in improving the quality and electrochemical performance for Lithium-ion Capacitor (LIC) application.
Manufacture of Solid Polymer Electrolyte (SPE) Based on PVDF HFP-LiBOB Humaidi, Syahrul; Aldira, Syarah; Lestariningsih, Titik
Journal of Technomaterial Physics Vol. 4 No. 2 (2022): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v4i2.8250

Abstract

This research aimed to synthesize solid polymer electrolyte (SPE) with and without Polyethylene oxide (PEO) using the solution cast technique. The liquid electrolyte of LiBOB was synthesized with the immersing method. The chemicals used are PVDF-HFP (0.75 g), TiO2(0.05 g), PEO(0.25 g), DMAC, EC, EMC, and LiBOB(1.55 g). The morphology of the surface membrane was characterized using SEM. The results of the SEM analysis shows that the addition of PEO plays a role in forming the SPE membrane because the addition of PEO greatly affects the density of the SPE sheet.
Characterization of CuCrO2 Material Produced Using Sol-Gel Method Delviya Amisha; Humaidi, Syahrul; Imaddudin, Agung
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.v5i1.9910

Abstract

This study aimed to analyze CuCrO2 material produced using the sol-gel method. The characterization used is X-ray Diffraction (XRD) and Scanning Electron Micoscope-Energy Dispersive Spectroscopy (SEM-EDS). The sample was made by weighing the raw material and measuring the solution with a measuring cup according to stoichiometric calculations, then dissolving it, burning it, grinding it, calcining it, sintering it, forming it into pellets, and re-sintering it. The XRD results show that the main phase of the sample is CuCrO2 and impurities (CuCr2O4). From the SEM results, the average particle size is 155.948µm.
Manufacture of Lithium Lanthanum Titanate Active Material as a Lithium-Ion Capacitor Anode Using Solid-State Reaction Methods Liza, Erliza Pratiwi; Humaidi, Syahrul; Rifai, Abdulloh
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.v5i1.9919

Abstract

Lithium lanthanum titanate, Li0.2La0.6TiO3 (LLTO) was synthesized for the manufacture of lithium-ion capacitors using the solid-state reaction method. in this study, the active ingredients were synthesized using variations of lithium and lanthanum as raw materials. The raw materials used are Li2CO3, La2O3, and TiO2. The three raw materials were mixed according to the stoichiometric calculations then added 13 ml of Ethanol solution so that the raw materials were mixed evenly during the milling process for 5 hours. Sintering was carried out for 8 hours at 800oC and then at 1150oC for 12 hours. The sintered powder was ground using a mortar and pastel and then sieved on a 400 mesh sieve. The anode sheet was made by mixing the active ingredients: PVDF: Super-P with a composition of 85:10:5 by adding 3 ml of DMAC solvents. The characterization test was carried out using XRD while the electrochemical test used CV and EIS. The XRD result shows the formation of the main phase and the impurity phase with the main phase percent of 96.4%. From the results of electrochemical testing, the percentage of capacity is 73%.
Co-Authors Abdulmajid, Muhammad W. Achmad Subhan Achmad Subhan Aditia Warman Agitta Rianaris Agung Imaduddin, Agung Aldira, Syarah Alfonsius Chrisandy Pratama Siregar Aliakbar, Muhammad 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 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 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