Indonesia has considerable wind energy potential. Energy generation system performance can be monitored and controlled through the Internet of Things (IoT) technology. However, research and development of IoT technology in wind turbines in Indonesia is still low. Therefore, in this study, the author seeks to conduct research related to the development of a website-based wind turbine control and data monitoring system. This research uses a 3 blade horizontal axis wind turbine (NACA 2410). The monitoring system uses the Raspberry Pi 3B + microcontroller and several sensor devices such as the IR LM393 speed sensor to measure wind speed and shaft rotation speed, and the INA219 current-voltage sensor to measure the voltage and current of a 350 Watt DC generator. The website was created using the Laravel 5.8 PHP framework and Chart.js. Furthermore, the sensor calibration process and system testing are carried out. Based on the test results, it was found that the monitoring data system was functioning properly. The data has been successfully sent to the server and can be monitored in real-time via the website. Based on the results of the IR LM393 sensor calibration test, the linear regression equation y = 0.7881x + 13.837, and the value of R2 = 0.9934 is obtained. And the value of R2 = 0.9934 indicates that the sensor calibration process is well correlated. The results of testing the control system and monitoring of wind turbine data monitored through the website for 1 x24 show that the highest wind potential occurs at 13.00 to 14.00 WIB, namely at a wind speed of 3.74 m / s.

Kapal nelayan dari bahan kayu lambat laun sudah mulai ditinggalkan oleh nelayan. Kini, nelayan sudah banyak beralih menggunakan kapal dari material fiberglass. Ini dikarenakan jumlah bahan kayu yang sudah semakin terbatas, dan harganya juga sangat mahal. Selain itu, kapal kayu membutuhkan banyak sekali perawatan dan masa pakainya juga terbatas. Sementara kelebihan kapal fiberglass antara lain, usia atau masa pakai kapal lebih tahan lama, perawatan jauh lebih mudah dan hemat biaya (cost). Kapal fiber juga jauh lebih ringan, dan lebih maksimal dalam produksi tangkap ikan. Proses pembuatan kapal fiberglass yang banyak dibuat, menggunakan teknik Fiberglass Reinforced Plastic (FRP). Dalam pembuatan kapal fiber, ada dua metode laminasi yang sering digunakan, yakni Hand Lay Up dan Chopper Gun. Metode ini adalah metode laminasi yang paling mudah dan sederhana. Hand Lay Up adalah metode cetakan terbuka (open mould). Metode ini dilakukan dengan cara mengaplikasikan resin pada bahan penguat dengan menggunakan kuas/rol. Penelitian dilakukan di daerah nelayan Pantai Muaro Padang. Ada lima unit kapal nelayan fiberglass yang menjadi sampel. Tujuan penelitian ini untuk membantu nelayan, khususnya memproduksi kapal fiberglass yang jauh lebih baik untuk memaksimalkan hasil tangkapan ikan.Kata Kunci : FRP, hand lay up, resin, open mould, Pantai Muaro

Application of natural composite materials for aerial fields has been widely developed. One of the uses of natural composite materials for Unmanned Aerial Vehicle (UAV) frame. In this study, waste polystyrene paper, bagasse powder and eggsheel powder was used for material of UAV frame. Type of UAV was made in this study is quadcopter. Addition of volume fraction of waste polystyene paper to 65 % in green composite material.  The aims this study was determine the flight time and toughness frame of quadcopter based on waste materials. This study showed that there was increase of quadcopter flight time with the addition of  waste polystyrene paper in composites up 65% by volume fraction. Addition of  waste polystyrene paper in composites up 65% by volume fraction, the results showed that the toughness frame of quadcopter was decreased. Photomacro was used to show the stucture and porosity of frame quadcopter based on natural composite material.