Journal of Energy, Material, and Instrumentation Technology http://jemit.fmipa.unila.ac.id/index.php/jurnal <div> <div> <table class="data" width="100%" cellpadding="1" bgcolor="#F4A460"> <tbody> <tr valign="top"> <td width="20%">Journal Name</td> <td width="80%"><strong><a href="http://jemit.fmipa.unila.ac.id">Journal of Energy, Material, and Instrumentation Technology</a> </strong></td> </tr> <tr valign="top"> <td width="20%">Initial</td> <td width="80%"><a href="http://jemit.fmipa.unila.ac.id"><strong>JEMIT</strong></a></td> </tr> <tr valign="top"> <td width="20%">Frequency</td> <td width="80%"><strong>4 Issues a year (February, May, August, November)<br /></strong></td> </tr> <tr valign="top"> <td width="20%">DOI</td> <td width="80%"><a href="https://doi.org/10.23960/jemit" target="_blank" rel="noopener"><strong>10.23960/jemit</strong></a></td> </tr> <tr valign="top"> <td width="20%">ISSN</td> <td width="80%"><a href="https://issn.brin.go.id/terbit/detail/1605242825" target="_blank" rel="noopener"><strong>2747-2043</strong></a></td> </tr> <tr valign="top"> <td width="20%">E-ISSN</td> <td width="80%"><strong><a href="https://issn.brin.go.id/terbit/detail/1605577787" target="_blank" rel="noopener">2747-299X</a></strong></td> </tr> <tr valign="top"> <td width="20%">Editor-in-Chief</td> <td width="80%"><a href="https://www.scopus.com/authid/detail.uri?authorId=55387649100"><strong>Gurum Ahmad Pauzi, S.Si., M.T.</strong></a></td> </tr> <tr valign="top"> <td width="20%">Publisher</td> <td width="80%"><strong><a title="Department of Physics, Faculty of Mathematics and Natural Science, University of Lampung" href="http://fisika.fmipa.unila.ac.id/" target="_blank" rel="noopener">Department of Physics, Faculty of Mathematics and Natural Science</a>, <a title="University of Lampung" href="http://www.unila.ac.id" target="_blank" rel="noopener">University of Lampung</a> </strong></td> </tr> </tbody> </table> </div> <div> <table class="data" width="100%" cellpadding="1" bgcolor="#F4A460"> <tbody> <tr valign="top"> <td width="20%">Indexed</td> <td width="80%"><a href="https://sinta.kemdikbud.go.id/journals/profile/9773" target="_blank" rel="noopener"><strong>Sinta</strong></a>, <a href="https://garuda.kemdikbud.go.id/journal/view/22376" target="_blank" rel="noopener"><strong>Garuda</strong></a></td> </tr> </tbody> </table> </div> </div> <p><strong>Journal of Energy, Material, and Instrumentation Technology </strong>as a means for researchers, lecturers, teachers, researching, and students to communicate knowledge, research results and observations, related to physics, both theory and its application. Articles can also consist of supporting physics which is supported by a background and theoretical physics that can be accounted for. Overall articles published in <strong>Journal of Enery, Material, and Instrumentation Technology </strong> have been review by reviewers and experts in their fields. Manuscripts received by <strong>Journal of Enery, Material, and Instrumentation Technology </strong> are written in Indonesia or English, which have never been published, or are not currently being discussed for publication in other journals or proceedings.<br /><br />This journal publishes 5 to 7 articles for each issues four times a year in <strong>February, May, August, </strong>and <strong>November</strong>. Should you interest, we recommend you to read our policy as well as author guidelines.</p> <p> </p> <p><strong>Announcement</strong></p> <p>In connection with improving the quality and accreditation of journals, as well as facilitating citations nationally and internationally, as of February 22, 2021, articles must be written in English.</p> <p>--------------------------------------------------------------------------------------------------------------------------------------------------</p> <p><strong>INDEXED BY:</strong></p> <p><a href="https://sinta.kemdikbud.go.id/journals/profile/9773" target="_blank" rel="noopener"><img src="http://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/mceclip2.png" /></a> <a href="https://scholar.google.co.id/citations?hl=en&amp;user=FOqZwZsAAAAJ" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-gscholar.png" alt="" width="150" height="60" /></a> <a href="https://garuda.kemdikbud.go.id/journal/view/22376" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-garuda.png" alt="" width="150" height="60" /></a></p> <p><a href="https://app.dimensions.ai/discover/publication?search_mode=content&amp;and_facet_source_title=jour.1406805" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-dimension.png" width="150" height="60" /></a> <a href="https://journals.indexcopernicus.com/search/details?id=122485" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-ici.png" width="150" height="60" /></a> <a href="https://explore.openaire.eu/search/dataprovider?datasourceId=issn___print::335dbc3b47aa2fa4c547979a0e011057" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-open-aire.png" width="150" height="60" /></a></p> <p><a href="https://www.citefactor.org/journal/index/28868/journal-of-energy-material-and-instrumentation-technology#.YfGkF_gxW00" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-citefactor.png" width="150" height="60" /></a> <a href="http://olddrji.lbp.world/JournalProfile.aspx?jid=2747-299X" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-drji.png" width="150" height="60" /></a> <a href="http://journalseeker.researchbib.com/view/issn/2747-2043" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-research-bib.png" width="150" height="60" /></a></p> <p><a href="https://portal.issn.org/resource/ISSN-L/2747-2043" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-issn-internasional.png" width="150" height="60" /></a> <a href="https://moraref.kemenag.go.id/archives/journal/99586320216642235" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-moraref.png" width="150" height="60" /></a> <a href="https://onesearch.id/Search/Results?filter[]=repoId:IOS16538" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-one-search.png" width="150" height="60" /></a></p> <p><a href="https://www.scilit.net/journal/6079772" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-scilit.png" width="150" height="60" /></a> <a href="https://www.base-search.net/Search/Results?lookfor=journal+of+energy%2C+material%2C+and+instrumentation+technology&amp;name=&amp;oaboost=1&amp;newsearch=1&amp;refid=dcbasen" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-base.png" width="150" height="60" /></a></p> <p><strong>ON PROCESS:</strong></p> <p><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-ebsco.png" width="150" height="60" /> <img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-sherpa.png" width="150" height="60" /></p> <p> </p> <p><strong>RECOMMENDED TOOLS</strong></p> <p><a href="https://scholar.google.co.id/citations?hl=en&amp;user=FOqZwZsAAAAJ" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-mandeley.png" width="150" height="60" /></a> <a href="https://garuda.kemdikbud.go.id/journal/view/22376" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-mathtype.png" width="150" height="60" /></a> <a href="https://doi.org/10.23960/jemit" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-turnitin.png" width="150" height="60" /></a> <a href="https://www.google.com/aclk?sa=l&amp;ai=DChcSEwi-6q71jeX1AhVwkWYCHbseCvMYABAAGgJzbQ&amp;sig=AOD64_1-mdHfFgT1PR7bh2yOa407pjvmYA&amp;q&amp;adurl&amp;ved=2ahUKEwi8xqj1jeX1AhU27HMBHQruB8EQ0Qx6BAgDEAE" target="_blank" rel="noopener"><img src="https://jemit.fmipa.unila.ac.id/public/site/images/adminjurnal/logo-grammarly.png" alt="" width="150" height="60" /></a></p> Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung en-US Journal of Energy, Material, and Instrumentation Technology 2747-2043 Analysis of the Effect of Variations of Silica Concentration on Synthesis &gamma;-Al2O3 http://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/144 <p>Research has been carried out to analyze the effect of variations in silica concentration on the synthesis of &amp;gamma;-Al<sub>2</sub>O<sub>3</sub>. This research was conducted to determine the variation of Silica against the support &amp;gamma;-Al<sub>2</sub>O<sub>3</sub>which is the best as a hydrotreating catalyst in the green fuel industry by using several physical characteristics and analyzing the effect of silica variations on the surface area, pore volume, and pore size of the support. This study uses materials such as Boehmite (AlOOH), equates, 25% NH4OH solution, 6% HNO3, and several variations of Silica such as (Carboxyl, SIRAL, and ZSM). In the process of making supports &amp;gamma;-Al<sub>2</sub>O<sub>3</sub>with the sol-gel method in order to homogenize the solutions and silica powders as a buffer variant, it becomes AlOH powder, which is then printed with a press and calcined at a temperature of 550<sup>o</sup>C gradually to become powder.buffer &amp;gamma;-Al<sub>2</sub>O<sub>3</sub>. From the study results, the best variation of &amp;gamma;-Al<sub>2</sub>O<sub>3</sub> silica buffer was carboxyl with a concentration of 6% because several characterization studies showed superior results to &amp;gamma;-Al<sub>2</sub>O<sub>3</sub> support without silica variation. The results of the Surface Area Analyzer characterization greatly affect the hydrotreating catalyst process in the green fuel industry, namely the &amp;gamma;-Al<sub>2</sub>O<sub>3</sub> buffer with the addition of 6% silica carboxyl concentration. This is because a large surface area, pore size, and large pore volume can contain more impregnant solution, and the amount of active phase dispersed will also be greater.</p> Nadhifatul Fuadiyah Roniyus Marjunus Wawan Rustyawan Syafriadi Syafriadi Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0 2024-03-16 2024-03-16 5 1 1 9 10.23960/jemit.v5i1.144 Design and Electrical Characterization of Plant Microbial Fuel Cell (PMFC) Using Eichhornia crassipes by Varying the Electrode Distance and Effect Light of the Sun http://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/159 <p>The Plant Microbial Fuel Cell (PMFC) design using water hyacinth has been successfully created. The PMFC was then treated by varying the distance of the electrode and giving the effect of sunlight. The electrodes used are Cu-Zn pairs where the electrode distance varies, with values of 3, 6, 9, and 12 cm. Furthermore, the data was taken with PMFC conditions placed outside and indoors for 14 days (331 hours). The results showed that PMFC with an electrode distance of 3 cm produced a more excellent value of electrical power than the other electrode distances, which was 0.6786 mW on the second day at the 37th hour or in the afternoon at 13.00 WIB. In general, the electrical characteristics produced by PMFCs, which are affected by sunlight, produce greater electrical power than PMFCs indoors.</p> Mei Suryani Gurum Ahmad Pauzi Junaidi Junaidi Sri Wahyu Suciyati Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0 2024-03-16 2024-03-16 5 1 10 16 10.23960/jemit.v5i1.159 Production of an Orbital Shaker Device with Time and Rotational Speed Control Using Potentiometer Based on Arduino Uno http://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/219 <p><em>Mixing solutions is an everyday activity performed in laboratory spaces. Mixing solutions manually by shaking is less effective, as it takes a long time and requires much effort. Therefore, an orbital shaker has been created to mix solutions with a digital unidirectional movement. This device is designed using a DC motor as the driver, an L298N motor driver, an Arduino Uno as the processor, a potentiometer to adjust the speed and rotation time, a seven-segment TM1637 display to show the set values, and push buttons as start and reset buttons. Testing the orbital shaker begins by inputting PWM values on the potentiometer and then measuring the DC motor's rotation speed (rpm) using a tachometer. The calibration testing includes calibrating the rotation speed values (rpm) and time. The results of rotation speed calibration testing show an average error value of 1.09%, accuracy of 98.91%, and precision of 99.77%. In comparison, time calibration yields an average error value of 2.45%, accuracy of 97.55%, and precision of 99.99%. Subsequently, speed testing is conducted using a solution load ranging from 100 to 1000 g, with each increment of 100 g testing rotation speeds from 240 to 360 rpm. The results indicate that when a load is applied, there is a decrease in the measured rotation speed compared to the input speed. The orbital shaker can rotate within a speed range of 240 to 374 rpm and a maximum time of 90 minutes with a maximum load of 1000 g.</em></p> Icha Arum Vicias Gurum Ahmad Pauzi Humairoh Ratu Ayu Sri Wahyu Suciyati Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0 2024-03-16 2024-03-16 5 1 17 27 10.23960/jemit.v5i1.219 Computational Exploration of Intrinsic Rashba Splitting in Janus Si2SbBi Monolayer Using Density Functional Theory http://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/239 <p>In this paper, we investigate the electronic structure of Janus Si<sub>2</sub>SbBi monolayer and compare it with the non-polar systems Si<sub>2</sub>Bi<sub>2</sub> and Si<sub>2</sub>Sb<sub>2</sub> monolayer based on Density Functional Theory (DFT) calculation. According to the first-principles calculation, these systems exhibit semiconductor properties with energy gaps are 0.674 eV, 0.28 eV, and 1.13 eV for Janus Si<sub>2</sub>SbBi, Si<sub>2</sub>Bi<sub>2</sub>, and Si<sub>2</sub>Sb<sub>2</sub>, respectively. In addition, the intrinsic Rashba splitting is also observed around the &amp;Gamma; Point on conduction band minimum (CBM) in the electronic structure of Si<sub>2</sub>SbBi monolayer, which is not found in Si<sub>2</sub>Sb<sub>2</sub> and Si<sub>2</sub>Bi<sub>2</sub> monolayer systems. This Rashba splitting phenomenon we analyze by using the perturbation theory based on symmetry group and get the first-order Rashba Parameter &amp;alpha;<sub>1</sub>=1.84 eVÅ , and &amp;alpha;<sub>1</sub>=1.73 eVÅ , for &amp;Gamma;-K and &amp;Gamma;-M direction, respectively. With the strong intrinsic Rashba Splitting, the Janus Si­<sub>2</sub>SbBi monolayer has excellent potential to be the candidate of semiconductor material for spintronics devices.</p> Yusuf Affandi Yusron Darojat Muhammad Anshory Awi Masfufah Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0 2024-03-16 2024-03-16 5 1 28 34 10.23960/jemit.v5i1.239 FTIR, XRD, and SEM-EDX Characterization of Synthesized B-Type Carbonated Hydroxyapatite (CHAp) Based on Crab Shells http://jemit.fmipa.unila.ac.id/index.php/jurnal/article/view/241 <p>The synthesis and characterization of B-type CHAp based on mangrove crab shells (Scylla serrata) as a source of calcium using the precipitation method has been successfully carried out. Based on the FTIR results, the substitution of carbonate ion for phosphate, which indicates the formation of B-type CHAp, is characterized by the appearance of absorption at wave numbers (CO<sub>3</sub><sup>2-</sup>) 1426 and 875 cm<sup>-1</sup>, PO<sub>4</sub><sup>3-</sup> at wave numbers 965, 619 &amp; 569 cm<sup>-1</sup>. The XRD results show that diffraction peaks (211), (300), and (202) appear at an angle of 2&amp;theta; ranging from 31°-34°, and there is a phenomenon of a-axis contraction and c-axis expansion in the HAp lattice structure. The SEM-EDX results show that the Ca/P ratio is 1.72, and the carbonate content is 5.01 wt%. All of these parameters are characteristics of CHAp, so it can be concluded that type-B CHAp has been formed.</p> Muhamad Fajar Muarif Yusril Yusuf Ade Irmadiki Agipa Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0 2024-03-16 2024-03-16 5 1 35 42 10.23960/jemit.v5i1.241