Infotekmesin 2023-11-29T11:51:35+07:00 Ratih Hafsarah Maharrani Open Journal Systems <p align="justify"><strong>INFOTEKMESIN&nbsp;</strong>is a peer-reviewed open-access journal with e-ISSN <strong><a href=";1564733309&amp;1&amp;&amp;" target="_blank" rel="noopener"> 2685-9858</a>&nbsp;</strong>and p-ISSN: <strong><a title="ISSN" href=";1339729931&amp;1&amp;&amp;" target="_blank" rel="noopener">2087-1627</a></strong> published by Pusat Penelitian dan Pengabdian Masyarakat (P3M) Politeknik Negeri Cilacap. The journal invites scientists and engineers to exchange and disseminate theoretical and practice-oriented in the various topics include, but not limited to <strong>Informatics, electrical Engineering, and mechanical Engineering.</strong> Submitted papers must be written in Bahasa or English for an initial review stage by editors and further review process by a minimum of two reviewers.<br>The editors will only accept the manuscripts which meet the assigned format. Please submit your manuscript and Download&nbsp;the template&nbsp;<a style="font-family: Tahoma, Verdana, Arial, Helvetica, sans-serif; font-size: 12px;" href="" target="_blank" rel="noopener"><strong>HERE</strong></a><br><strong>Jurnal&nbsp;<strong>INFOTEKMESIN</strong> has been accredited as a scientific journal by the </strong><strong>Ministry of Research and Technology/National Research and Innovation Agency Republic of Indonesia:&nbsp;<a href="" target="_blank" rel="noopener">SK-AKREDITASI No.200/M/KPT/2020 (SINTA 3)</a>. <br></strong><strong>Certificate of accreditation can download <a href="" target="_blank" rel="noopener">HERE</a></strong></p> Analisis Kandungan Silikon Karbida (SiC) Sebagai Filler Terhadap Peningkatan Kekerasan Pada Metal Matrik Komposit 2023-11-29T11:51:08+07:00 Muhammad Ghazali Arrahim Leo Hutri Wicaksono Muhammad Syaiful Fadly Afrizal Abdi Musyafiq <p><span style="font-weight: 400;">Metal Matrix Composite is one of the metal composites that utilize aluminum alloy as a matrix in its fabrication. MMC has better specifications than the conventional materials it forms because it is light, ductile, with better hardness properties. The aluminum alloy as the matrix in this study has good mechanical properties but relatively low hardness values, especially type 2xxx aluminum containing Al-Cu or duralumin. By adding silicon carbide (SiC) ceramic content which acts as a filler in the manufacture of MMC it aims to increase the hardness value through a strengthening mechanism by analyzing the distribution of filler particles to the matrix. Using the sintering method with temperature variations that affect the mechanical properties of MMC. From the tests carried out the MMC specimens experienced an increase of 7.06% with the highest hardness value at 300oC sintering temperature of 71.6 HRB. With a SiC content of 14.42% Wt. Then it was observed using a Scanning Electron Microscope (SEM) that the distribution of SiC particles experienced an even distribution and bonded to the aluminum matrix thereby reducing porosity and increasing the hardness value of the MMC material<em>.</em></span></p> 2023-07-29T04:31:03+07:00 Copyright (c) 2023 Muhammad Ghazali Arrahim, Leo Hutri Wicaksono, Muhammad Syaiful Fadly, Afrizal Abdi Musyafiq The Robot Design Rancang Bangun Robot Pembersih Solar PV Dengan Sistem Pengendali Nirkabel 2023-11-29T11:50:53+07:00 Oktavianus Ardhian Nugroho Y.B. Adyapaka Apatya Fransiskus Octario Sanctos Perdana Tukan Yoannes Fredy Sakti <p><span style="font-weight: 400;">One type of renewable energy source that is starting to be widely used at this time is the type of solar power generation. This system uses a photovoltaic effect where sunlight is converted into electricity. A solar cell usually consists of an arrangement of semiconductors cells often called solar PV modules. Obstacles arise when this PV module is dirty because the electrical power generated by the module becomes decreased. Manual cleaning is one of the ways to restore power to this PV. In this study, a cleaning robot machine has been designed and made that can clean solar PV modules automatically. The purpose of the study is to simplify the module maintenance process, ensure the safety and security of workers, reduce module damage, and ensure the cleanliness of the module. The design method has successfully made a robotic machine to clean solar PV modules. The test results also prove that the tool made can clean the module quickly and safely.</span></p> 2023-07-29T05:36:35+07:00 Copyright (c) 2023 Oktavianus Ardhian Nugroho, Y.B. Adyapaka Apatya, Fransiskus Octario Sanctos Perdana Tukan, Yoannes Fredy Sakti Pengaruh Penambahan methanol Terhadap Emisi Bahan Bakar Mesin Sepeda Motor Berbahan Bakar Pertamax 150 CC 2023-11-29T11:50:40+07:00 Faqih Fatkhurrozak Firman Lukman Sanjaya Syarifudin Syarifudin Andre Budhi Hendrawan M. Khumaidi Usman Gunawan Gunawan <p>Automotive vehicles have increased every year, especially motorcycles, which result in increased air pollution. The use of alternative fuel methanol is one of the solutions to control air pollution. methanol has a high oxygen content so it can improve emissions. This study aims to analyze the use of a mixture of Pertamax and methanol fuel on exhaust emissions using a 150 cc EFI gasoline engine. The percentage of methanol used in the test is 5%, 10%, and 15%. Variation of engine speed from 1000 to 3000 rpm with an interval of 1000 rpm. Measurement of exhaust emissions using a gas analyzer. The addition of methanol to Pertamax fuel reduced HC emission levels at PM15 by 34% at 3000 rpm and CO by 43% at 3000 rpm at PM15, while CO2 and O2 emission levels increased by 23% at 3000 rpm at CO2, mixing PM15 and at O2 emissions of 163% at a speed of 3000 rpm on PM5.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-29T06:13:30+07:00 Copyright (c) 2023 faqih fatkhurrozak, Firman Lukman Sanjaya, Syarifudin Syarifudin, Andre Budhi Hendrawan, M. Khumaidi Usman, Gunawan Gunawan Komparasi Model Analisis Sentimen Pada Twitter Terhadap Kemahalan Minyak Goreng dengan Metode Naive Bayes dan Support Vector Machine 2023-11-29T11:51:35+07:00 Moh. Aminullah Al Fachri Ummi Athiyah <p>At the end of 2021, people are shocked by the drastically reduced supply of cooking oil and high prices. This makes people talk about it a lot through social media like Twitter. Freedom on Twitter raises many responses from the public. The number of negative and positive responses on Twitter makes comparisons between the two responses difficult to observe. This study aims to determine the comparison of positive responses and negative responses. Machine learning with the naïve Bayes method and support vector machine is able to overcome this problem. The research conducted examines how the comparison between positive responses and negative responses and which method has higher accuracy. The data used is 10,000 Indonesian language tweets. Model testing was carried out with 1839 test data. the Naive Bayes method gets an accuracy of 74.06% with the results of predicting two positive tweets and 1837 negative tweets. The SVM method was tested on linear, polynomial, RBF, and sigmoid kernels. The kernel with the highest accuracy value is the sigmoid kernel with an accuracy of 81.8% with the predicted results of 266 positive tweets and 1573 negative tweets.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-29T00:00:00+07:00 Copyright (c) 2023 Moh. Aminullah Al Fachri, Ummi Athiyah Klasifikasi Citra Mengkudu Berdasarkan Perhitungan Jarak Piksel pada Algoritma K-Nearest Neighbour 2023-11-29T11:51:21+07:00 Candra Irawan Eko Hari Rachmawanto Christy Atika Sari Raisul Umah Nur <p><span style="font-weight: 400;">Noni fruit is included in exported food commodities in Indonesia. The size of noni fruit, based on human vision, generally has varied shapes with distinctive textures and various patterns, so that the process of filtering fruit based on color and shape can be done in large quantities. In this study, K-Nearest Neighbor (KNN) has been implemented as a classification algorithm because it has advantages in classifying images and is resistant to noise. Noni imagery is a personal image taken from a noni garden in the morning and undergoes a background subtraction process. The imagery quality improvement technique uses the Hue Saturation Value (HSV) color feature and the Gray Level Co-Occurrence Matrix (GLCM) characteristic feature. KNN accuracy without features is lower than using HSV and GLCM features. From the experimental results, the highest accuracy was obtained using HSV-GLCM at K is 1 and d is 1, namely 95%, while the lowest accuracy was 55% using KNN only at K is 5 and d is 8.</span></p> 2023-07-29T00:00:00+07:00 Copyright (c) 2023 Candra Irawan, Eko Hari Rachmawanto, Christy Atika Sari, Raisul Umah Nur Analisis Perpindahan Gaya SideLoad Pegas Suspensi Tipe C Menggunakan Finite Element Method (FEM) 2023-11-29T11:50:27+07:00 Sigit Setijo Budi Firman Lukman Sanjaya Faqih Fatkhurrozak Syarifudin Syarifudin Nur Aidi Ariyanto <p><span style="font-weight: 400;">The suspension must provide comfort and safety to the vehicle. Therefore, it is necessary to analyze the load's effect on the pressure distribution on the axle so that the spring strength from the sideload force can be simulated. This study aims to analyze the sideload force of type C suspension springs using FEM. Spring variations are the number of different threaded coils, namely 11, 12, and 13. In the FEM simulation, the spring is given a load until 50mm, 100mm, 150mm, 200mm, and 250mm displacement occurs. The loading spreads to the X, Y, and Z axes. Each direction of the axis is measured by the pressure that occurs. The results showed that the pressure values that occur on the X, Y, and Z axes decreased with each increase in the number of screw coils. The lowest X-axis pressure reduction occurs in thread 12 at 63%. Meanwhile, the pressure on the Y axis decreased by 27% on the spring screw 12. The highest decrease in pressure on the Z axis occurred by 34% on the spring screw 12 compared to the spring screw 11.</span></p> 2023-07-30T00:00:00+07:00 Copyright (c) 2023 Sigit Setijo Budi, Firman Lukman Sanjaya, Faqih Fatkhurrozak, Syarifudin Syarifudin, Nur Aidi Ariyanto Comparative Analysis of Cloning-Hashing Applications for Securing Digital Evidence 2023-11-29T11:50:14+07:00 Muhammad Nur Faiz <p>The development of the Internet has resulted in an increasing variety of cyber crimes. Cybercrime is closely related to digital evidence, so cybercriminals tend to delete, hide, and format all collected data to eliminate traces of digital evidence. This digital evidence is very vital in proving at trial, so it is necessary to develop applications to secure digital evidence. This study aims to compare the results of cloning and hashing in securing digital evidence and evaluate the performance of a digital forensic application developed under the name Clon-Hash Application v1 compared to applications commonly used by investigators including Autopsy, FTK Imager, md5.exe in terms of its function, the result, CPU usage. The results of the research conducted show that the cloning process is perfectly successful, as evidenced by the hash value results which are the same as paid applications and there are even several other applications that have not been able to display the hash value. Hash values in the Clon-Hash v1 application also vary from MD5, SHA1, and SHA256 which do not exist in other applications. Applications developed are better in terms of function, results, and CPU usage.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-30T00:00:00+07:00 Copyright (c) 2023 Muhammad Nur Faiz Penerapan Sistem ATS (Automatic Transfer Switch) sebagai Pengendalian, Pemantauan, dan Perawatan Berbasis IoT (Internet of Things) 2023-11-29T11:50:00+07:00 Syahrul Pambudi Vicky Prasetia Saepul Rahmat <p>The need for electricity is increasing along with population growth. The main electricity supply (PLN) is not always continuous in its distribution, so alternative power is needed, namely generators. The ATS (Automatic Transfer Switch) system can transfer the voltage source to the load. The ATS system is equipped with IOT in the form of a Blynk application on Android which functions as a controller and can send ATS damage notifications. This research was conducted to meet the electricity needs. Users can monitor, control and maintain the ATS system in the event of a breakdown. The method in this study uses a quantitative method, namely data collection by testing the ATS system and testing the IOT Blynk application function as a notification of damage to the ATS system. The result of transferring the PLN voltage to the generator is only 7 seconds and 3 seconds vice versa. There was damage to the lamp cable 1 time, the relay 1 time, and the fan cable 2 times. The results of measuring the current and voltage of the PLN source: lamp load 0.02A, 3.4V; fan 0.04A, 3.5V; AC motor 0.04A, 4V. Generator current and voltage measurements are as follows: lamp load 0.02 A, 9.1V; 0.03A, 9V fan; AC motor 0.05A, 4.5V.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-30T00:00:00+07:00 Copyright (c) 2023 Syahrul Pambudi, Vicky Prasetia, Saepul Rahmat Perhitungan Daya Kompresor dan Beban Kalor Pada Hasil Tangkapan Ikan Laut 2023-11-29T11:49:47+07:00 Boby Wisely Ziliwu Darel Aprilio Muharram <p>A refrigeration machine is needed on a fishing boat because the purpose of catching is to catch as many fish as possible and maintain the quality of the catch. In general, fishing vessels use mechanical refrigeration machines in an effort to maintain the quality of the catch up to the hands of consumers. The results of checking products that enter the hold showed the average initial temperature of the fish entering the hold was 11,7 <sup>o</sup>C.&nbsp; The final temperature of fish products after going through the freezing process is 2,075<sup> o</sup>C.&nbsp; The total product load calculation is 101,1 KW and the average product heat load on the hold is 9,1 KJ/s. By knowing the suction pressure, exhaust, and working temperature of the compressor through a worksheet that is journalized every day, as well as the temperature in the pipe after the condenser, and the expansion valve using the Mollier R-22 diagram and the Saturation Properties-Temperature R-22 table, it is known that the average compressor power average of 1,9 KW and actual COP averaging is 4,6 KJ/Kg. The total compressor power result calculation is 20,96 KW with an average usage of 1,9 KW. The total result of the COP actual calculation is 51,4 with an average of 4,6.</p> 2023-07-30T00:00:00+07:00 Copyright (c) 2023 Boby Wisely Ziliwu, Darel Aprilio Muharram Manajemen Risiko Teknologi Informasi Aplikasi E-Office ASN Menggunakan ISO 31000:2018 2023-11-29T11:49:35+07:00 Fathoni Mahardika Muhammad Agreindra H Siti Ainun Fatimah Lusi Tsulutsiah Nur F <p>In carrying out the task of government affairs at Diskominfosanditik Sumedang Regency, an E-Government system is implemented, namely the ASN E-Office application which is a website-based and mobile-based application with a minimum specification of Android 4 which is used by all ASN (State Civil Apparatus) consisting of PNS (Civil Servants) and PPPK (Government Employees with Work Agreements) in Sumedang Regency. With this application, there may be threats and attacks including vulnerabilities that pose a risk, which disrupt the process of using the application. Therefore, the researcher decided to conduct information technology risk management research as a handling and protection of the application by applying the risk management process from ISO 31000:2018 where any information needed in this research was obtained from internal sources at Diskominfosanditik Sumedang Regency. This research was conducted in the informatics section and resulted in 14 possible risks consisting of 3 risks with high levels, 2 risks with medium levels, and 9 risks with low levels. From the GAP measurement, there is a difference that the need for risk measurement as the first step for risk management.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-30T00:00:00+07:00 Copyright (c) 2023 Fathoni Mahardika, Muhammad Agreindra H, Siti Ainun Fatimah, Lusi Tsulutsiah Nur F Unjuk Kerja Termal Kolektor Surya PV/T Bersirip Menggunakan Metode Computing Fluid Dynamic 2023-11-29T11:49:21+07:00 Amrizal Nalis Muhammad Irsyad Ahmad Yonanda Rizal Khairudin <p>Photovoltaic Thermal (PV/T) collector is a device that can produce electrical energy and thermal energy simultaneously. However, the thermal energy increases the surface temperature of the PV and therefore it may reduce electrical efficiency. To overcome this problem, a finned thermal collector should be joined underneath the PV surface. The aim of this study is to simulate the thermal performance of a PV/T collector by using staggered fins with air as a working fluid. The parameters are varied from 25 to 50 mm in the fin geometry and from 12 to 48 g/s in air mass flow rate, respectively. Furthermore, the heat radiation used was 860 W⁄m<sup>2</sup> and Computing Fluid Dynamic (CFD) method was implemented in this research. The results showed that the PV/T surface temperature decreased by 7.04 % for the fin height of 37.5 mm and 11.9 % for the fin height of 50 mm when compared to the fin height of 25 mm. Thus, a greater cooling of the PV/T surface occurs in the fin height of 50 mm due to an increase in the heat transfer area which might absorb more of the unused thermal energy in comparison with others.</p> 2023-07-30T00:00:00+07:00 Copyright (c) 2023 Amrizal Nalis, Muhammad Irsyad, Ahmad Yonanda, Rizal Khairudin Analisa Tensile Strength Komposit Serat Kulit Pohon Waru dengan Kombinasi Serat Karbon Kevlar Sebagai Material Reinforcement 2023-11-29T11:49:08+07:00 Handry Stefan Enus Gatot Soebiyakto Arief Rizki Fadhillah Dadang Hermawan <p>In increasing the tensile strength of the waru tree bark fiber composite (Hibiscus tiliaceus), it is necessary to have a combination of reinforcement used in the composite material. One of the reinforcement materials that can be combined is carbon fiber kevlar. Kevlar carbon fiber has several advantages, including low density, absorbing vibrations well, and it is resistant to chemical solutions. The specific objectives of this study were to determine the maximum strain stress, modulus of elasticity, and fracture analysis of hibiscus bark fiber composites with a combination of kevlar carbon fiber as a reinforcement material. The independent variable in the study was comparing the composite with the different reinforcement materials used, including 100% hibiscus (Hibiscus tiliaceus) bark fiber, 100% kevlar carbon fiber, 50% combination fiber of hibiscus (Hibiscus tiliaceus) bark, and 50% kevlar carbon. The process of making composites uses the vacuum infusion resin method with specimens referring to the ASTM D638-03 type I standard. The results of this study are that combining kevlar carbon fiber as a reinforcement material can improve the mechanical properties in terms of the tensile strength of the hibiscus tree bark fiber composite.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Handry Stefan Enus Handry, Gatot Soebiyakto Gatot, Arief Rizki Fadhillah Arief, Dadang Hermawan Prototype Sistem Kendali Pintu Gerbang Otomatis Berbasis Internet of Things (IoT) 2023-11-29T11:48:55+07:00 Novita Lestari Anggreini Nia Ekawati Hasbi Nur Ichsan <p>An automatic gate is a door whose operation process runs automatically using a remote drive tool, but when combined with IoT elements, it means that users can control the automatic gate using a cell phone or mobile phone. The purpose of this research is to create a prototype of an automatic gate control system based on the Internet of Things (IoT). The method used in the current research is the prototype method. The results in this study were tested to determine the range. Testing is done using an adapter connected to a power supply. The testing process is carried out by observing the movement and response of the servo motor when controlled via a smartphone and the stepper motor when the Ultrasonic sensor detects an object less than 5 cm. The conclusion of this research is that at a distance of 1 to 19 meters, the gate lock can still be controlled properly. While at a distance of 20 meters when the gate lock is open, the gate opens and closes. This is because the WiFi signal cannot be captured properly by the central controller of the circuit at a distance of more than 19 meters.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Novita Lestari Anggreini, Nia Ekawati, Hasbi Nur Ichsan Pengaruh Pemadatan Dua-arah Penekanan Terhadap Densitas dan Kekerasan AMC diperkuat Serbuk Silikon Dioksida 2023-11-29T11:48:29+07:00 Ricky Irwansyah Rodika Rodika Agus Wanto Mego Wahyudi Sukanto Wiryono <p>The compaction method of powder metallurgy technology is an important process in influencing the density and hardness of the resulting product. This study aims to determine the effect of a one-way compaction method compared to a two-way compaction method on the density and hardness of the resulting composite product. The experimental method for making aluminum matrix composites with silica sand reinforcement applies a compaction pressure of 4500 Psi. Mixing utilizing mechanical alloying used a horizontal ball mill machine. The density test refers to the Archimedes principle with the ASTM B962-17 standard, while the Rockwell Brinel hardness test uses the ASTM E110-14 standard. The results of the sample density test of the two-way compaction method of compaction showed a higher value compared to the sample density of the one-way compaction results, respectively; values of 2.132 g/cm3 and 2.119 g/cm3. The hardness value of the sample resulting from two-way compression compaction also has a higher value than the sample hardness resulting from one-way compression compaction, respectively; worth 43.67 HRB and 36.78 HRB. Furthermore, based on the results of microstructural analysis, the interlocking bonding occurs in composite samples with two-way compaction. It is also better than the interlocking mechanical bonding in composite samples resulting from one-way compaction.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Ricky Irwansyah, Rodika Rodika, Agus Wanto, Mego Wahyudi, Sukanto Wiryono Investigation of Exhaust Emissions Combustion Characteristics in Single Spark Ignition-Engine Matic with Butanol-Gasoline Mixture 2023-11-29T11:48:17+07:00 Gatot Setyono Dwi Khusna Navik Kholili Lingga Putra Sanjaya Fajar Galang Argil Putra <p>Butanol as a fuel has a high oxygen content, so the combustion process will be more friendly to the environment. In this study, butanol will be mixed with RON-90 gasoline with a capacity of 5% (B5); 7%(B7); 10%(B10); 12%(B12); 15%(B15) and 18%(B18). The engine used is an automatic transmission with a capacity of 109.5cc with a compression ratio of 9.5:1. The test equipment for engine performance and exhaust emissions is the 50L BRT Super-Dyno and EPSG4 Gas Analyzer. The results showed that using B18 fuel for CO exhaust emissions decreased by 44% at an engine speed of 6000rpm. CO<sub>2</sub> exhaust emissions have decreased by 47% at 8000rpm engine speed. HC exhaust emissions have decreased by 28% at 9000rpm engine speed. In contrast to NOx emissions, which increased by 22% at 9000rpm engine speed, this was due to the increasing temperature in the combustion chamber.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Gatot Setyono, Dwi Khusna, Navik Kholili, Lingga Putra Sanjaya, Fajar Galang Argil Putra Efek Pencampuran Butanol dan Diethyl Ether (DEE) Pada Pertalite Terhadap Torsi, Daya dan Brake Spesific Fuel Consumpsion Mesin Bensin 160cc 2023-11-29T11:48:04+07:00 Firman Lukman Sanjaya M. Khumaidi Usman Faqih Fatkhurrozak Syarifudin Syarifudin Andre Budhi Hendrawan <p><span style="font-weight: 400;">The increase in the volume of vehicles resulted in a crisis of fossil fuels so there is a need for alternative fuels to replace gasoline. Butanol and Diethyl Ether (DEE) are alternative fuels that can be added to gasoline. This is because the Octane Number and high O2 levels optimize combustion in the cylinder and increase torque and power and save fuel. This study compares the addition of butanol and DEE to gasoline on torque, power, and Brake Specific Fuel Consumption (BSFC). The study used a 160cc gasoline engine with a carburetor with engine speeds of 1000, 2000, and 3000 rpm. Variation of fuel mixture 5%, 10%, and 15% on gasoline. The results showed that the DEE15 mixture increased the highest torque by 28% at 3000 rpm compared to other fuel mixtures. Engine power also increases the highest by 28% when using a mixture of DEE15 compared to other fuels. Meanwhile, BSFC experienced the highest decrease of 19% when using the DEE15 mixture compared to other mixtures.</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Firman Lukman Sanjaya, M. Khumaidi Usman, Faqih Fatkhurrozak, Syarifudin Syarifudin, Andre Budhi Hendrawan Klasifikasi Opini Publik di Twitter Terhadap Bakal Calon Presiden Indonesia Tahun 2024 Menggunakan LSTM Secara Realtime Berbasis Website 2023-11-29T11:47:51+07:00 Muhammad Rizki Muhammad Fikri Hidayattullah Dwi Intan Af'idah <p><span style="font-weight: 400;">The analysis of public opinions from Indonesian netizens regarding the potential presidential candidates for Indonesia in 2024 on Twitter is challenging. Human-based classification of the candidates on Twitter has limitations as it requires expertise and a considerable amount of time to process the data. Therefore, a system that provides realtime visualization of public opinion classification is necessary. Previous research only focused on model evaluation, while this study aims to implement the best model on a website. The objective of this research is to develop a system for monitoring the Twitter-based public opinion classification of the potential presidential candidates for Indonesia in 2024 within specific time frames. The training process utilizes the LSTM method, resulting in a model with an accuracy of 76%. Parameters such as batch size, dropout, and learning rate were tested. The data used in this study was obtained by crawling Twitter using the keywords Ganjar Pranowo, Anies Baswedan, and Prabowo Subianto. The LSTM model was then implemented in a website-based system that generates a dashboard with features such as a color-coded map displaying the highest levels of positive sentiment for each candidate in each province, the overall classification count for each candidate, and filters for sentiment classification based on province and specific time frames.&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Muhammad Rizki, Muhammad Fikri Hidayattullah, Dwi Intan Af'idah Optimalisasi Labview Sebagai Kendali dan Monitoring Arus Tegangan pada Modul Solar Cell Menggunakan Jaringan Lokal 2023-11-29T11:47:38+07:00 Sugeng Dwi Riyanto Purwiyanto Purwiyanto Riyani Prima Dewi <p>Renewable energy sources in Indonesia have been widely used, one of which is solar energy, for various needs, one of which is for solar power generation by using solar cells as the medium. In generating electricity, solar cells are very dependent on the intensity of the sun so as to produce currents and voltages that are not constant. Because of this, a monitoring system was created to monitor the current and voltage in a solar cell module to determine current and voltage conditions. In this study, the monitoring system used wireless data transmission via the XBee S2C module installed on the Arduino Mega 2560 and Arduino UNO. The INA 219 sensor is mounted on a solar cell module along with a relay module connected to the Arduino Mega 2560 and the XBee S2C module. The test results show that wireless data transmission cannot be used indoors at a distance of more than 20 meters. The INA 219 sensor as a reader for DC current and voltage parameters has an error rate of 0.49% to 0.75% for voltage and for DC current readings it has an error rate of 1.85%. The results of current and voltage readings are displayed on a LabVIEW interface in real-time and can be accessed via a web browser using a local network. Relay control carried out through LabVIEW has a delay time of 6.08 seconds. Logging data can be stored in .xls files and data displayed on a web browser has a delay of one to two seconds.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Sugeng Dwi Riyanto, Purwiyanto Purwiyanto, Riyani Prima Dewi Rancang Bangun Aplikasi Peramalan Jumlah Penumpang Menggunakan Long Short-Term Memory (LSTM) 2023-11-29T11:47:25+07:00 Muhammad Davi Edi Winarko <p><span style="font-weight: 400;">Public services such as public transportation are closely related to user satisfaction. Busway DKI Jakarta is one of the first public transportation services in Southeast and South Asia. In order to maintain passenger satisfaction, the management of Busway continues to improve services such as adding buses and opening a new line. Opening a new lane or adding buses must necessarily be adjusted also with the increasing number of passengers. So to know the number of passengers in the future, it is necessary to forecast the number of passengers through existing historical data. The historical data used is time series data from January 2015 to January 2016. The method used in forecasting is Long Short-Term Memory (LSTM), one of the machine learning methods. The method is measured in accuracy using Root Mean Squared Error (RMSE) and Mean Absolute Percentage Error (MAPE). As a comparison of LSTM accuracy in forecasting, we also use the Exponential Smoothing method. Based on the results of forecasting, the most and least dominant method of producing RMSE and MAPE is the LSTM method. Only in corridor 3 LSTM can not provide RMSE and MAPE values below baseline values. While corridor 5 LSTM can give better results after the data transformation process by using exponential smoothing. However, overall the LSTM method provides the best accuracy based on the lowest average RMSE and MAPE values, namely RMSE of 2640.53 and MAPE of 9.14%.</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Muhammad Davi, Edi Winarko Monitoring of Rice Dryer Machine Using Tray Dryer Method 2023-11-29T11:46:59+07:00 Neneng Herani Saepul Rahmat Vicky Prasetia <p>Indonesia is an agricultural country with 40% of the population's livelihood provided by farmers. Harvested rice typically has a moisture content of 20-27% on a wet basis. The type of artificial dryer that is often used is the tub or rotary type. This research aims to develop a rice dryer using a combined tray and rotary-type method. Based on the result, the higher the speed dryer, the shorter the drying time. The net result of this test is that the relationship between time and engine speed is inversely proportional. The higher the speed, the shorter the drying time. The net result of this test is that the relationship between time and engine speed is inversely proportional. Rice drying results can be described as dry, but not including ready-to-eat rice standards. The higher the speed, the shorter the drying time.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Neneng Herani, Saepul Rahmat, Vicky Prasetia The Influence of Fillet Step on Backward-Facing Step Flow Characteristics 2023-11-29T11:46:46+07:00 James Julian Rizki Aldi Anggara Fitri Wahyuni <p>Backward-facing step (BFS) is a model that provides several applicative features in engineering. The complex phenomena of BFS flow have a crucial impact on any application. Therefore, this study comprehensively investigates the flow characteristics of BFS with various step shapes. The backward-facing step (F-BFS) fillets were tested at intervals of Reynolds number 50 smaller than Re smaller than 400 using the CFD approach. Based on the computational results, it was found that flow separation is a fundamental phenomenon in BFS flow. Due to sudden expansion, Flow separation forms a recirculation area which continues to increase almost linearly with an increase in the Reynolds number. The recirculation area contains unstable rotating vortexes, which can impact the flow efficiency of BFS. Using a different step shape proves that F-BFS can minimize the recirculation area to increase the efficiency of the BFS flow.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 James Julian, Rizki Aldi Anggara, Fitri Wahyuni Kontrol Kestabilan Kapal Autonomous Submarine Surface Vehicle Dengan Metode Fuzzy Logic 2023-11-29T11:46:33+07:00 Abdul Hafizh Abyan Faruq Joko Endrasmono Isa Rachman Agus Khumaidi Ryan Yudha Adhitya Zindhu Maulana Ahmad Putra <p>The Autonomous Submarine Surface Vehicle is a type of unmanned underwater vehicle. When the ship performs maneuvers, there are large Pitch and Roll motions. This research aims to control the stability of the Autonomous Submarine Surface Vehicle with Fuzzy. The first process is taking Pitch and Roll data followed by the Fuzzification process to change input data with firm values into Fuzzy values. The next stage is Inference by using the rules (if – then) and the Deffuzification process to change the results of the inference stage into output values. The last is the process of stabilizing the ship with a Thruster dc motor. When the system is activated, it has a time of 0.518 seconds faster to steady state than the deactivated system with a roll tilt of (plus) 11°. On the roll tilt of (plus) 20° the highest PWM rotation is 1600µs with a time of 9,342 seconds to steady state and the roll tilt is (plus) 11° with the highest PWM of 1500µs with a time of 4,335 seconds. Based on this research, the Fuzzy Method can control the stability of the Autonomous Submarine Surface Vehicle ship.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Abdul Hafizh Abyan Faruq, Joko Endrasmono, Isa Rachman, Agus Khumaidi, Ryan Yudha Adhitya, Zindhu Maulana Ahmad Putra Uji Performa Model Batam Marine Ambulance Sebagai Armada Pendukung Medis dan Logistik 2023-11-29T11:46:19+07:00 Naufal Abdurrahman Prasetyo Rahman Hakim Sapto Wiratno Satoto Muliawan Nur Abiyad Yogantara <p>This study aims to test the performance of the Batam Marine Ambulance model as a medical and logistics support fleet using the comparison ship method. A series of stability and motion analysis processes were carried out, then the results were assessed to determine the best design among the proposed design options. Performance tests used three ship models (Model I, Model II, and Model III). It is known that in the stability test, the tilt angle of model III is 33.63° and the maximum GZ value is 4.673 cm. Then, in the resistance test, Model I has a lower resistance of 87.29 N and the required power is 1496.93 W compared to the other proposed models. In the seakeeping test, Model III was found to be more stable or less affected on all surface conditions because the RAO value was relatively lower, namely 90<sup>o</sup> in terms of heaving, rolling, and pitching at 135<sup>o</sup> and 180<sup>o</sup> then had lower additional resistance. The Model III design has good ship stability, drag, and seakeeping characteristics.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Naufal Abdurrahman Prasetyo, Rahman Hakim, Sapto Wiratno Satoto, Muliawan Nur Abiyad, Yogantara Rancang Bangun Sistem Pengisian Otomatis Merica Bubuk Berbasis Kontroler Arduino Nano 2023-11-29T11:46:06+07:00 Zaenurohman Zaenurohman Galih Mustiko Aji Hera Susanti <p>Pepper powder is currently widely marketed in packaged form. The process of packing pepper manually has several drawbacks. In addition to the speed of the packaging process, there is also the problem of weighing the packaging accurately. This study aims to design and build a tool for automatically filling pepper powder into bottles based on Arduino Nano. Conveyors are used to place bottles precisely at the filling position. The process of filling the powdered pepper automatically starts after the bottle is detected by the photoelectric sensor. A <em>Screw</em> is used to put the ground pepper into the bottle, while the load cell sensor is used to measure the weight of the powdered pepper filling. The performance of this filling system shows that the average duration of filling time is 0.97 seconds per gram, while the accuracy of reading the weight of filling pepper powder has an error rate of 2.78%. Information during the filling process, which includes the weight of the powder that has entered the bottle, the amount of production, and information on the remaining ingredients available in the hopper, can be properly monitored through the HMI display.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Zaenurohman Zaenurohman, Galih Mustiko Aji, Hera Susanti Sistem Komunikasi Mikrokontroler dan PLC Berbasis Komunikasi Serial Host Link dan Protokol C-Command RS232 2023-11-29T11:45:52+07:00 Dewi Rizani Ruwahida Ruwahida Isa Rachman Hendro Agus Widodo Ryan Yudha Adhitya Yuda Irawan <p>The communication between microcontrollers and PLC has become an important technology development that needs to be enhanced. One of the reasons for the communication between these two devices is to facilitate the input process of data or information from sensors, which are responsible for detecting or measuring specific parameters. Not all sensors can be directly read by PLC, as some sensors have their own communication protocols or specific libraries that are not directly supported by PLC. Microcontrollers are often used as intermediaries between sensors and PLC. Microcontrollers can read sensor data and then convert it into a format that can be understood by PLC. Microcontrollers can perform flat processing tasks such as conversion and status evaluation to provide more relevant data, and then send this data to the PLC through a compatible communication protocol. In this study, the communication protocol used is the Host Link serial communication using the C-mode Command method. The communication testing conducted using 10 different data samples resulted in accurate values with an error percentage of 0%.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Dewi Rizani Ruwahida Nurokim, Isa Rachman, Hendro Agus Widodo, Ryan Yudha Adhitya, Yuda Yuda Pengaruh Metode Quenching dan Tempering Terhadap Kekerasan Material Hot rolled Plate (HRP) Steel 2023-11-29T11:45:39+07:00 Akhlis Rahman Sari Nurhidayat Nur Akhlis Sarihidaya Laksana Yurianto Yurianto <p>Hot rolled plate steel as a material to be used for steel armor needs to have the characteristics of a high hardness value. Medium carbon steel as the basic material is quenched at a temperature of 900 <sup>o</sup>C and tempering is carried out at a temperature of 125 <sup>o</sup>C and 175 <sup>o</sup>C with a holding time of 30 minutes. The M<sub>s</sub> value is a benchmark for changes in martensite which is influenced by the constituent elements of the material. The use of water as a quench medium changes the structure of austenite to martensite. The martensite structure that occurs increases the optimum hardness value in HRP Steel material. The tempering process carried out above the M<sub>s</sub> value causes a decrease in the hardness value. The highest hardness value was obtained in the quenching process with 542 HV which was influenced by the distribution of martensite. The decrease in hardness value occurs due to the tempering process, the average hardness value at temper 125 <sup>o</sup>C is 524.4 HV and 175 <sup>o</sup>C is 524 HV.</p> <p><em>&nbsp;</em></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Akhlis Rahman Sari Nurhidayat, Nur Akhlis Sarihidaya Laksana, Yurianto Yurianto Rancang Bangun Kwh Meter Digital Menggunakan Internet of Things 2023-11-29T11:45:26+07:00 Rio Guntur Dany Rafi Supriyono Supriyono Zaenurrohman Zaenurrohman Purwiyanto Purwiyanto <p>In general, the kWh meter is installed in a distribution substation that supplies electrical energy to the building. The weakness of ordinary kWh meters cannot provide real information on electricity consumption. Measuring and recording the use of electrical energy still requires human power. By utilizing an internet network based on the Internet of Things (IoT) concept, this research aims to design and manufacture a digital kWh meter to monitor and control the use of electrical energy in buildings in real-time on a website. Using the website and the MYSQL-PHPMyAdmin Database as data storage. The PZEM-004T sensor is used to measure the electrical energy used, then it is processed on the Wemos D1 Mini microcontroller. From the test results that have been carried out, the digital Kwh meter has succeeded in monitoring and controlling the use of electrical energy through the website in real-time. Percentage average error value: voltage: 0.44% - 0.49%, current: 0.36%, cos phi leading: 39%, cos phi lagging: 1%, power: 0.93% - 2.68%, kWh: 16.3%, frequency: 0 %.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Rio Guntur Dany Rafi, Supriyono Supriyono, Zaenurrohman Zaenurrohman, Purwiyanto Purwiyanto Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting 2023-11-29T11:44:53+07:00 Galuh Bahari Benidiktus Tulung Prayoga <p>As the solidification reaches the hot spot area, no molten metal remains and shrinkage is formed. To anticipate the shrinkage, a riser is added to the casting system. An optimal riser design would produce free shrinkage components. One of the factors that affect riser efficiency is the riser shape. This study aims to find the most efficient side riser shape by using simulation software. The riser shape of tubes, tubes with a half sphere on top, hemispheres, conical tubes, tubes with an oval cross-section, and cubes are used in this experiment, with the volume of all risers kept constant. The most efficient shape of the riser is the tube. The tube riser produces a larger modulus. The tube riser generated directional solidification. The same pattern can be seen in the niyama criteria and solidification temperature, where the tube riser has a more continuous pattern compared to other riser shapes.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Galuh Bahari, Benidiktus Tulung Prayoga Perhitungan Pengendalian Persediaan Fast Moving Spare Part Dengan Metode Min-Max Stock 2023-11-29T11:44:40+07:00 Alyaa Sekar Khairunnisa Braam Delfian Prihadianto <p><span style="font-weight: 400;">Maintenance is an effort to maintain a heavy equipment unit to keep it in good condition. One of the techniques to maintain unit performance is by carrying out maintenance management which is a combination of various activities such as monitoring, scheduling, repairing, and inventory control. One part of maintenance management is inventory management which aims to ensure the availability of spare parts in the warehouse so that it can increase the efficiency of maintenance time. The purpose of this study is to calculate the supply of fast-moving spare parts, especially oil filters and diesel filters using the Min-Max Stock method at PT Armada Hada Graha Basecamp Kelontong. The research used a comparative quantitative method utilizing spare parts usage data from January to March 2022 and inventory stock data on March 2022. From the calculation results it can be concluded that the percentage of filter inventory between the minimum and maximum stock values ​​is 7%. It happens due to several factors, namely, materials, methods, machines, and the environment.</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Alyaa Sekar Khairunnisa, Braam Delfian Prihadianto Analisis Kekuatan Tarik dan Regangan Filamen Carbon Fiber Hasil 3D Print dengan Variasi Fill Density 2023-11-29T11:44:27+07:00 Braam Delfian Prihadianto Suryo Darmo Dani Anggoro Hasan Dovan Ndaru Ananda <p><span style="font-weight: 400;">Mechanical properties problems that are closely related to the strength of 3D printed products generally occur during the development of 3D printing machines, In which several components used are the results of additive manufacturing technology. The damages generally occur in the components that receive force and the damage is in the form of cracks and fractures. The focus of this study is to determine the effects of increasing the value of fill density on mechanical properties, especially tensile strength and strain with carbon fiber filament material. This study used an experimental method using two types of filament material: nylon carbon fiber and PLA carbon fiber with a diameter of 1.75 mm for each filament and a recommended printing temperature of 190-260°C. Both types of filaments were printed using a direct extruder type 3D printing machine with a build size of 180 mm x 180 mm x 180 mm and printing was carried out at atmospheric pressure and a horizontal printing area. The Universal Testing Machine carried out mechanical properties testing implementation related to tensile strength and strain. Based on the results of experiments and tests that have been carried out, the strain values ​​are 16.970 – 26.681% and the tensile strength is 19.244 – 23.899 MPa for nylon carbon fiber filament material. Whereas the PLA carbon fiber filament material, the strain value is 7.673 – 15.546%, and the tensile strength is 18.580 – 24.552 MPa. Therefore, based on the test results, it is known that the fill density parameter value has an influence on the strain value and tensile strength so that it can be used as a reference in setting machining parameters.</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Braam Delfian Prihadianto, Suryo Darmo, Dani Anggoro Hasan, Dovan Ndaru Ananda Metode Economic Order Quantity dalam Sistem Manajemen Stok Bandar Barang Bekas (SiBandar) 2023-11-29T11:44:14+07:00 Cahya Vikasari Riyadi Purwanto Dwi Novia Prasetyanti <p>Junk goods are no longer piles of worthless goods for businessmen who are keen to see the economic value by taking this opportunity by becoming a pelapak company to buy and sell junk goods purchased from collectors to be sold to buyers. The problems found with Pelapak include the manual recording of sales administration which has the potential to cause recording errors. Pelapak does not know for sure the stock of junk they own and those owned by collectors because the locations of the collectors are far apart. Orders of junk goods between pelapak and collectors are still via telephone so pelapak does not know which collectors are in the process of sending goods. Problems also occur on the part of collectors including unprofessional sales transactions. Based on these problems, a used goods stock management system is needed using the Economic Order Quantity (EOQ) method. The purpose of this study is to build a used goods stock management information system that can monitor the availability of used goods owned by collectors and pelapak. System development uses the prototype method and designs with concepts. The results of the research are that the system created can help find out the stock and the amount in each collector, recap sales reports, provide accurate information, facilitate business transactions and fulfill sales targets to buyers.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Cahya Vikasari, Riyadi Purwanto, Dwi Novia Prasetyanti Simulasi Tegangan (Stress) Pada Komponen Rangka Mesin Uji Tarik Sealent Menggunakan Solidworks 2023-11-29T11:43:48+07:00 Dian Prabowo Unggul Satria Jati Ulikaryani Ulikaryani Probo Hardini <p>A series of processes are carried out in order to obtain the desired product result. One of the processes carried out is testing the strength of polymers by means of tensile testing in this case testing of polymer-based sealants. The method used is the method of simulating frame loading on the tensile testing machine that has been made. The software used to assist the simulation process is SolidWorks. The simulation is carried out in static mode or a fixed loading (no movement or vibration). A stress Analysis Simulation is carried out to get the result of static loading in the form of σ (stress). Loading simulations on the frame of the tensile testing machine for the tensile testing of the sealant are carried out on the components of the frame with different loading variations. Frame components with upward loading are given an average load of 38.5 MPa. Meanwhile, the frame components with downward loading are given an average load of 6.169 MPa. The largest average stress obtained from each component is 0.326 N/mm<sup>2</sup>. this value does not exceed the yield strength of&nbsp; 235 N/mm<sup>2</sup>.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Dian Prabowo, Unggul Satria Jati, Ulikaryani Ulikaryani, Probo Hardini Pengaruh Jenis Limbah Aluminium Pada Proses Pengecoran Menggunakan Tungku Krusibel Terhadap Nilai Kekerasannya 2023-11-29T11:43:35+07:00 David Dwi Putra Faisal Haqqoni Mohammad Nurhilal Ulikaryani Ulikaryani <p>Aluminum waste that has accumulated due to the widespread use of aluminum in household needs, daily life, and in the manufacture of industrial material components will have an impact on the environment if not handled properly. It is necessary to utilize aluminum waste in a product that has a sale value through a casting process using a crucible furnace. This research was conducted to determine the hardness differences of waste aluminum from used aluminum cans, used aluminum pots, and used aluminum wires melted in a smelting furnace. This study uses quantitative analysis and experimental research types. Tests carried out on this crucible furnace were carried out to determine the effect of the type of aluminum waste and the length of time it took to smelt the three types of material on the hardness results. The results of the Rockwell hardness test on aluminum can waste have an average value of 71.38 HRB, on aluminum pans waste it has an average value of 71.68 HRB, and on aluminum cable waste it has an average value of 53.02 HRB.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 David Dwi Putra, Faisal Haqqoni, Mohammad Nurhilal, Ulikaryani Ulikaryani Pengaruh Penambahan Arang Tempurung Kelapa Terhadap Kualitas Briket dari Arang Pelepah Nipah Menggunakan Tepung Tapioka Sebagai Perekat 2023-11-29T11:44:01+07:00 Mohamad Arifin Rosita Dwityaningsih Taufan Ratri Harjanto <p>Nipa Palm fronds is one of the biomass that has potential to be used as briquettes because it has high cellulose. The calorific value of nypa palm frond will cause low briquettes quality. The aims of this study is to determine the effect of the addition of coconut shell charcoal. The research method used was by mixing coconut shell charcoal with nipa palm charcoal with various compositions and using tapioca flour as an adhesive as much as 10% of the total weight of briquettes. It was found that the addition of coconut shell charcoal can improve the quality of briquettes according to SNI No.1/6235/2000 with the best composition ratio palm charcoal:coconut shell charcoal which is 20%:80%. Briquettes have a moisture content 2,43%, ash content 7,3%, a calorific value 6779,64 Kal/gram, density 1 gram/cm<sup>2</sup> and a burning rate of 0,0393 gram/minute.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Mohamad Arifin, Rosita Dwityaningsih, Taufan Ratri Harjanto Studi Perancangan Instalasi Penerangan dan Pengkondisi Suhu Ruangan Pada Gedung Bertingkat Las Mesin 2023-11-29T11:48:42+07:00 Vicky Prasetia Erna Alimudin Purwiyanto Purwiyanto Muhamad Yusuf Mohammad Nurhilal <p>Lighting is one of the most important requirements of a building. This is because inadequate lighting of a space can affect the health and comfort of activities in that space. In addition to less important lighting, room temperature adjustments, room temperature adjustments have a significant impact on comfort during activities in the room. This magazine describes the lighting and room temperature control design of the CilacapState Polytechnic Welder Shop. The method used in this study is a quantitative method. This method calculates the required lighting and room temperature control and compares it with the standards. 2 rooms increase the number of light points and 3 rooms change the type of lamp with a higher lumen. There are 8 rooms that are recommended to use air conditioners with SNI 91714189. According to the SNI, the number of air conditioners and the capacity of air conditioners adjusts to the size of the room.</p> <p><span style="font-weight: 400;">&nbsp;</span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Vicky Prasetia, Erna Alimudin, Purwiyanto Purwiyanto, Muhamad Yusuf, Mohammad Nurhilal Perbandingan Nilai Daya Luaran Panel Surya Kapasitas 50Wp Terhadap Posisi Reflektor Cermin Datar 2023-11-29T11:47:12+07:00 Arif Sumardiono Fadhillah Hazrina Arief Syaefulloh <p><span style="font-weight: 400;">Solar panel systems are widely used to meet energy needs at this time. Solar panels have optimal power for 4 hours, namely 10:00 to 14:00. but this is still said to be not optimal if the angle of the static solar panels does not follow the movement of the sun. This can also be caused by weather factors that are covered in clouds. Previous research conducted by Tri Wahyu Ardianto used mirror reflectors but was not equipped with sensors and data storage. Based on this, to optimize solar panel energy, a flat mirror reflector design for solar panels has been made, equipped with four flat mirror reflectors on each side to form a large square. The solar panel is placed in the middle between the four flat mirrors. In this study, the measurement of electric power was carried out by carrying 3 variable angles for reflector positions, namely 0°, 60°, and 70°. The decision of the three reflector positions is made to find out the ratio of the maximum output power values. This system is also equipped with current, voltage, and light intensity sensors. The results show that the maximum output power of solar panels is shown at the reflector position of 60° with an average power output of 19.70 Watt followed by a reflector position of 70° with an average output power of 19.18 Watt and finally the reflector position is 0° with an average output power value of 14.87 Watt. </span></p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Arif Sumardiono, Fadhillah Hazrina, Arief Syaefulloh Sistem Informasi Posyandu Remaja Dalam Perkembangan Kesehatan Gizi dan Konseling Remaja Menggunakan Framework Codeigniter 2023-11-29T11:45:13+07:00 Aneke Dewantari Andesita Prihantara Abdul Rohman Supriyono Antonius Agung Hartono <p>Genius Youth Posyandu is the smallest health unit in the RW 14 area of ​​Sidanegara Subdistrict, Cilacap Regency which has the task of providing nutrition and health services to adolescents. So far, all series of Posyandu Adolescent activities are recorded conventionally in a book. The emergence of time inefficiency due to the limited number of cadres and the large number of young members of the Youth Posyandu. The difficulty of monitoring the development of nutritional health and nutrition counseling that has been carried out has also become a concern of cadres in the process of reporting Posyandu Adolescent activities to the Kelurahan level. system using blackbox testing. After testing this system, it was proven that all system functions were running well so that it made it easier for cadres to manage adolescent Posyandu anthropometric data, cadres to identify adolescent nutrition trends, and youth to view Posyandu data and offer counseling online.</p> 2023-07-31T00:00:00+07:00 Copyright (c) 2023 Aneke Dewantari , Andesita Prihantara, Abdul Rohman Supriyono, Antonius Agung Hartono