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The optimal performance of solar panels is very important to produce maximum electrical energy. Solar panels can work optimally when equipped with a solar tracker. The solar panel tracker works by following the sun's movement. A Proportional, Integral, Derivative (PID) based control is used to optimize the performance of the solar tracker. An optimal tuning is needed to get the PID parameter. The Firefly method is an intelligent method that can be used to optimize PID parameters. Three Firefly Algorithm (FA) parameters are used in the program: Beta is used to determine firefly speed, Alpha is used for flexibility of movement, and Gamma is used for more complex constraints or problems. This Dual Axis photovoltaic tracking study uses the beta value determination, changing the Bêta value from 0.1 to 0.9. From the results of 10 models, it was found that the PID constant values were varied. On the horizontal Axis, the best results are if the Beta is given at 0.4, and the worst result is if the Beta is given at 0.8. On the vertical Axis, the best results are if the Beta is given at 0.3, and the worst result is if the Beta is given at 0.8.

The Firefly Algorithm (FA) method is presented inspired by the social behavior of fireflies and the phenomenon of bioluminescent communication. There are three FA parameters used in the program, beta is used to determine firefly speed, alpha is used for flexibility of movement, and gamma is used for more complex constraints or problems. In this dual axis photovoltaic tracking study using the beta value determination. By changing the Bêta value from 0.1 to 0.9. From the results of 10 models, it was found that the PID constant values were varied. On the horizontal axis, the best results if the beta is given at 0.4 and the worst result if the beta is given at 0.8. On the vertical axis, the best results if the beta is given at 0.3 and the worst result if the beta is given at 0.8.

Digital television technology has more benefit than analog television, for example several TV channel may included in one frequency channel. The changing from analog to digital televisions system require more innovative antenna parameter such as working frequency, bandwidth, return loss, VSWR, and gain. In other hand, the size of the antenna must be minimalized, so it can be integrated inside digital television. This research used metamaterial element of Complementary Split Ring Resonator (CSSR) method with negative permittivity that manufactured in the patch and Double Pole Ground Plane in the ground side. The antenna ad 478-694 operating frequency. Antenna design and simulation using CST (Computer Simulation Technology) Microwave Studio 2012. The result show that return-loss value < -10 dB, and VSWR = 2 at 478-625 MHz range of frequency. Te value of gain is 3.27 dBi, it has 147 MHz bandwidth, and omnidirectional radiation pattern.

Social media marketing emerges as an appropriate method to assist MSMEs in marketing their products and interacting with their customers during the pandemic and the new normal. MSMEs can build significant business partnerships by engaging consumers as collaborators in actively reviewing and sharing the social value of the product on social media to improve marketing performance. This study had three goals: (1) analyzing the influence of social media marketing on social product value, (2) examining the effect of social product value on marketing performance, and (3) investigating the relationship between the influence of digital marketing and marketing performance. Purposive sampling has been used to select 112 respondents, including culinary MSMEs, that intensively promote their products on social media. Partial Least Squares SEM was used as a research method. According to this study, successful social media marketing raises the value of social products and marketing performance. Social media marketing develops the value of the social product, then improves marketing performance. This study revealed social product value as a moderating variable to empower the positive relationship between social media marketing and marketing performance. Keywords: social media marketing, social product value, marketing performance, and Culinary MSM

Merit order adalah metode paling sederhana dalam economic dispatch yang dilakukan dengan mengurutkan pembangkit dari yang paling rendah sampai yang paling tinggi biaya operasinya. Pembangkit yang paling rendah biaya operasinya (Rp/MWh) dianggap sebagai pembangkit yang paling ekonomis. Penelitian ini membahas tentang perhitungan daya pada pembangkit dengan menggunakan metode merit order. Ada tiga pembangkit yang digunakan untu menyuplai beban sebesar 975 MW. Simulasi digunakan dengan memperhitungkan losses. Hasil menunjukkan bahwa merit order membantu dispatcher untuk mengambil keputusan lebih cepat. SOP merit order dibuat berdasarkan biaya operasi pembangkit sehingga harus selalu disesuaikan dengan harga bahan bakar terkini.

Angin dan matahari merupakan energi alternatif, yang dapat dikelola secara maksimal menjadi energi yang bermanfaat pengganti energi konvensional. Data potensi energi suatu daerah, dapat dijadikan tolak ukur apakah energi yang ada dapat dimanfaatkan atau sebaliknya. Di Desa Tambakboyo mayoritas daerahnya berupa persawahan luas yang menyimpan potensi energi angin dan surya. Untuk mengetahui potensi tersebut diperlukan suatu alat pengukur secara kontinu berupa anemometer (kecepatan angin), wind vane (arah angin), serta solar cell (intensitas matahari). Pembuatan alat berupa sensor potensi energi angin dan surya yang dipasang diatas sebuah menara setinggi 6,5 meter. Sensor tersebut dihubungkan ke sebuah mikrokontroller Arduino ATMegap328P dan data hasil pengukuran sensor disimpan pada MMC (Memory Card). Sumber energi yang digunakan adalah energi surya yang dikonversi menjadi energi listrik oleh panel surya yang dialirkan menggunakan SCC (Solar Charger Controller) dan disimpan pada baterai berkapasitas 12 Volt 10 Ah yang selanjutnya dialirkan ke beban. Hasil pengukuran menunjukan bahwa rata-rata kecepatan angin di lokasi adalah 1,0928 m/s dengan potensi energi angin sebesar 0,7966 w/m^2 dan rata-rata intensitas surya 289,703 w/m^2 dengan potensi energi surya sebesar 289,703 w/m^2