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Since the outbreak of the Corona Virus Disease (Covid-19) case in March 2020, the government issued a policy to conduct distance learning. Conditions that require learning activities to be carried out online caused the children to to use applications to carry out learning activities. One of the obstacles in implementing distance learning activities is the lack of technology mastery by parents and children. This causes children to have difficulty in learning the material provided by the school. In this activity, training was conducted to use virtual learning applications as learning media with the target of active parents and students in TPA Ziyaadatul Hasanah, Duren Sawit. With this training, it is hoped that parents and students can use virtual learning applications. So that parents can guide their sons and daughters in conducting distance learning activity and students are not left behind due to internet connection problems. From the results of the questionnaire given to participants to measure understanding of the training, participants gained increased knowledge about virtual learning applications as proofed by the increase in scores obtained from the pre-test and post-test results. In the pre-test the average score obtained by the participants was 8.3 while in the post-test the average score was 9.45 out of a scale of 10. In terms of satisfaction, the average score given by the participants was in the range of 4.1 to 4.75 and belongs to the very good range. Based on the results of discussions with participants, participants expected that there would be further activities related to their problems to be provided by the community service team.ABSTRAKSejak merebaknya kasus Corona Virus Disease (Covid-19) pada bulan Maret 2020, pemerintah mengeluarkan kebijakan untuk melakukan pembelajaran secara jarak jauh (PJJ). Kondisi yang mengharuskan kegiatan pembelajaran dilakukan secara daring menyebabkan anak-anak harus menggunakan aplikasi untuk melakukan kegiatan pembelajaran. Salah satu kendala dalam pelaksanaan kegiatan PJJ adalah kurangnya penguasaan teknologi oleh orang tua dan anak. Hal tersebut menyebabkan anak-anak kesulitan dalam mempelajari materi yang diberikan. Pada kegiatan ini dilakukan pelatihan penggunaan aplikasi virtual learning sebagai media pembelajaran dengan sasaran orang tua dan siswa yang aktif di TPA Ziyaadatul Hasanah, Duren Sawit. Dengan adanya pelatihan ini diharapkan orang tua dan siswa dapat menggunakan aplikasi virtual learning. Sehingga orang tua dapat membimbing putra putrinya dalam PJJ dan siswa tidak tertinggal materi karena masalah koneksi internet. Dari hasil kuesioner yang diberikan kepada peserta untuk mengukur pemahaman terhadap pelatihan yang diberikan, peserta mendapatkan peningkatan pengetahuan mengenai aplikasi virtual learning yang dibuktikan dengan peningkatan nilai yang didapatkan dari hasil pre-test dan post-test. Pada pre-test nilai rata-rata yang didapatkan peserta adalah 8.3 sedangkan pada post-test rata-rata nilainya adalah 9.45 dari skala 10. Sementara dari sisi kepuasan, rata-rata skor yang diberikan oleh peserta berada pada rentang 4.1 hingga 4.75 dan termasuk ke dalam rentang sangat baik. Berdasarkan hasil diskusi dengan peserta, warga mengharapkan adanya kegiatan lanjutan dari pelatihan virtual learning yang dilakukan pada periode PkM ini.

When designing a microstrip antenna, the designers determined the desired parameters. However, the simulation software can only give the parameters result based on the given dimension. Therefore, optimization is required to meet the desired parameters. The designers usually do the optimization by the trial-error process. This research conducts machine learning implementation to predict the microstrip antenna dimension. The study focused on rectangular patch microstrip antenna with resonant frequency ranged from 1-8 GHz. The dataset used to make the prediction is obtained from simulation with antenna width ranged from 19-63 mm and length 10-54 mm. There are four algorithms employed: decision tree, random forest, Support Vector Regression (SVR), and Artificial Neural Network (ANN). Among all algorithms, random forest with estimator 15 gives the best result with Mean Square Error (MSE) value is 3.45. From the obtained result, the researchers can estimate the rectangular patch microstrip antenna dimension based on the desired parameters, which can’t be done by the antenna simulation software before.

Pada penelitian ini telah dirancang dan direalisasikan RT/RW-Net sebagai sistem yang berfungsi untuk mengakses jaringan internet. Sistem dibangun dengan menggunakan Router Mikrotik sebagai sistem operasi, access point sebagai penyalur jaringan, dan antena omnidirectional yang berperan sebagai pemancar dan penerima sinyal Wi-Fi dari perangkat pelanggan. Fitur user manager pada mikrotik berperan dalam mengatur beberapa fungsi seperti limitasi bandwidth dan limitasi kuota. Kuota dan masa tenggang dapat dibuat sesuai permintaan pelanggan. Sistem RT/RW-Net ini diuji pada saat pelanggan terhubung dengan hotspot RT/RW-Net secara otomatis pada perangkat pelanggan akan muncul halaman website dengan memasukan username dan password yang telah diberi oleh administrator. Kemudian sistem diuji dengan mengukur nilai Receive Signal Strength Indicator (RSSI) untuk menentukan kualitas sinyal berdasarkan standar yang berlaku. Berdasarkan hasil pengujian, nilai RSSI terendah yaitu -65 dBm pada jarak 280m arah barat dengan catatan pada daerah tersebut tidak ada halangan dari antena omnidirectional ke perangkat pelanggan. Sistem ini juga dapat menginformasikan status sisa kuota dan masa aktif kepada pelanggan pada halaman awal website.

Accuracy in data interpretation plays an important part in experiment result analysis. In this paper, a Wireshark captured packet file obtained from a voice call made through Voice over Internet Protocol (VoIP) system is analyzed. From the data, Wireshark added some bytes as additional information containing network adapter, IP, and protocol information. From the analysis, it is concluded that the actual transmitted or received data can only be seen from the packet’s detail information section. Keakuratan dalam interpretasi data memiliki peranan yang signifikan dalam analisa suatu hasil pengukuran. Dalam publikasi ini, file hasil capture Wireshark yang didapatkan dari panggilan suara melalui sistem komunikasi Voice over Internet Protocol (VoIP) dianalisa. Dari data hasil pengukuran, Wireshark menambahkan beberapa byte sebagai informasi tambahan yang berisi informasi mengenai network adapter, IP, dan jenis protokol yang digunakan. Dari hasil analisa, dapat disimpulkan bahwa jumlah data sebenarnya yang dikirim dan diterima hanya dapat dilihat dari bagian informasi detail paket.

Vehicular communications allowed the vehicles connected to traffic lights, road signs, or building infrastructures. Adaptive modulation enabled the system to maintain the quality level as the vehicles moved through different environments. In this paper, QPSK, 8PSK, and 16-QAM modulation schemes are utilized for low, medium, and high noise environments with the AWGN channel model. Reinforcement learning is implemented in the V2I scheme with an epsilon-greedy algorithm to decide which modulation scheme should be used based on the environment condition. The simulation showed promising results with most selected modulation scheme in low noise environment is 16-QAM, in medium noise is 8PSK, and in high noise is QPSK.

Photovoltaic (PV) and Diesel Generator (DG) hybrid power plant system could be one of the solutions to increase the renewable energy share and to reduce the fuel consumption in isolated Island. Especially in Indonesia, where most of the island supplied by DG. The goal of this study is to have the optimized solution of the PV Diesel system without a battery in Nusa Penida Island. It is assumed that new PV without a battery will be installed to work with six existing DG with a capacity of 1600 kW each to cover an average of 112 MWh/day load. By having the irradiance data, load data, diesel, and PV specification, the optimization can be done in HOMER Pro software. The sensitivity analysis is focused on the minimum load ratio where in this study it ranges from 25% to 80%. The result shows that the optimized PV size for the system is 6150 kW and it could cover 21% of the load, while the DG covers 79% of the total load. The sensitivity analysis indicates that different minimum load ratio affects the overall system performance. In the simple case shown, the different number of DG minimum load ratios can reduce fuel consumption by 5%.

Metamaterial is an artificial substance that has unique properties such as negative refractive index and negative permittivity that do not exist naturally in the universe. Metamaterial has been extensively used in antenna applications because of its numerous advantages. In antenna applications, the Split Ring Resonator (SRR) structure in the metamaterial antenna can improve antenna performance. In this paper, we use random forest regression which is part of machine learning algorithm to predict antenna parameters, such as gain, Voltage Standing Wave Ratio (VSWR), bandwidth, and return loss. Based on prediction result, number of estimator that resulted in lowest MAE for gain is 3 while for MSE is 2. For VSWR the lowest MAE and MSE is reached when the number of estimator is 8. For bandwidth, lowest MAE is achieved when the number of estimator is 1 while for MSE is 8. Return loss reaches the lowest MAE and MSE when the number of estimator is 24.

Despite the high solar energy potential in Indonesia, the number of installed photovoltaic (PV) rooftop is relatively small. To improve the development, the Indonesian government initiate some regulations such as the Ministry of Energy and Mineral Resources (MEMR) policy No. 49/2018 that advertised the 65% incentive and No.16/2019 that remove the cost for parallel capacity and parallel operation for industry customers. However, the number is still far away from the target set by the government. By calculating the techno-economic parameters based on the MEMR tariff regulation No.28/2016 and the Incentive given by the government as per regulation MEMR policy No.49/2018, this paper aims to shows the implementation of the regulation for two different tariff groups such as commercial and residential so that it can be used as a references to improve the policy and PV rooftop development. The result shows that even though the PV rooftop can reduce the electricity cost with saving rate 16.02% for residential and 23% for commercial, the high investment cost with estimate value of IDR 9 M for residential and IDR 360M for commercial, payback in 9 years and a 5.5% return on investment is not so attractive compared to the electricity price from the utility without installing PV. Thus, there should be an improvement on the incentive or policy to increase the number of PV rooftop for commercial and residential tariff group.

The availability of telecommunication infrastructure affects the development of an area, especially areas that have the potential for tourism and agricultural products such as Tenjolaya Village. The development of RT RW net as internet network infrastructure using Wi-Fi technology can be a supporting sector for the economic development of the village. Network deployment is carried out in three stages: preparation, construction and measurement. In the preparation stage, the number of users is calculated and a survey of the installation location is carried out. Furthermore, network development is carried out based on the network architecture that has been designed with CPE totaling four points. In the final stage, four parameters are measured to check the network conditions. The parameters are throughput, signal strength, CCQ, and SNR. From the measurement results, the measured throughput at the access point has a value range of 17 to 30 dBm. The measured Tx signal strength has a value of -75 to -39 dBm while the Rx signal strength is between -72 to -37 dBm. The CCQ value is between 76 and 100%. The measured SNR parameter has a value of 38 to 77 dBm.

More than half of Indonesia area haven't covered by the mobile network. Therefore an ad-hoc network delivering VoIP technology can be the solution for this problem. This paper presents the research using Raspberry Pi with Kamailio SIP server and OLSR routing protocol. From the experiment, the network performance shows a satisfying result when compared to the standard made by Indonesian Ministry of Communication and Informatics. Considering Raspberry Pi capability and experiment result, it is possible to use Raspberry Pi for VoIP system in the rural area.