The National Oceanic Atmospheric and Administration (NOAA) satellite is the 3rd Series of American meteorological for take information about the physical state of ocean and atmosphere. This research will describes the design of Satellite Image Acquisition System using two kinds of antenna, double cross dipole and Double V Double Dipole antenna as receiver of NOAA satellite and about performance of receiver system. The designed antenna works at frequency 137 Mhz with omnidirectional radiation pattern. The analysis process with analyzing the data receiving process with return loss parameter, signal to noise ratio (SNR), noise floor and image. The process of receiving data is by connecting antenna with RTL-SDR, SDRSharp software, WxtoImg, and Gpredict that has installed on laptop. Both antenna can receive data from NOAA satellite well, the data received are return loss value, noise floor, and image of Indonesian island that can be used for remote sensing. The antenna parameter for Double V Double Dipole are return loss -30.421 dB, VSWR 1.063, input impedance 51.642 Ohm and Gain 5.2 dB. For double cross dipole are return loss -29.315 dB, VSWR 1.071, input impedance 46.946 Ohm and Gain 4.47 dB. Both antenna have omnidirectional radiation pattern.
Power outlets are electrical devices that are very important in electrical systems. This paper discusses the development of a smart power outlet prototype designed to increase its capabilities. The prototype design is not only to provide electrical power but also to measure, display and transmit the value of electric current and power used. Another ability is to monitor the condition of the room, such as light intensity, temperature, and humidity. This capability enhancement can be used to optimize the building electrical automation system. This prototype is based on ESP32 System-on-a Chip microcontroller which is equipped with several sensors and supporting input and output components. The sensors used are the hall effect sensor to measure the value of electric current; light, temperature, and humidity sensor to measure the condition of the room. Values obtained from all sensors will be displayed on a small OLED display and sent using a WiFi network to a local web server. Furthermore, these values can be accessed and displayed in real time using an Android OS application on a cell phone. In addition to the monitoring function, the application can also perform a control function to turn on or off the power outlet wirelessly. This prototype has been designed, build, and tested to determine the validity of its function. The results show that in general, this prototype can function properly in accordance with the design specified.
Teknologi Self Organizing Network (SON) melakukan proses optimasi jaringan berdasarkan pengukuran parameter periodik secara otomatis. Teknologi SON ini dapat menghemat biaya operasional operator, menaikkan performansi dan kualitas jaringan melalui proses yang dinamis pada jaringan. Salah satu modul utama SON adalah Automatic Neighbor Relation (ANR). ANR bekerja dengan mengoptimasi Neighbor Lists untuk meningkatkan jumlah handover yang berhasil dan mengurangi koneksi yang gagal. Berdasarkan data yang diperoleh dari open loop report dan close loop report mengenai optimasi neighbor list sel 4G ke 3G ANR di kota Tangerang Selatan diperoleh hasil frekuensi dan band yang digunakan pada Kota Tangerang Selatan adalah 251 (10 MHz), 1850 (10, 20 MHz), 3500 (10 MHz), 38750 (20 MHz), dan 38948 (10, 20 MHz) untuk jaringan 4G dan 10638 untuk jaringan 3G, hasil implementasi modul 4G3G IRAT ANR di Kota Tangerang Selatan menunjukkan decision yang cukup baik dengan menambahkan relasi yang bagus dan menghapus relasi yang buruk, performansi KPI setelah dilakukan optimasi ANR mengalami kenaikan di sisi Circuit Switched FallBack (CSFB) dengan kenaikan sebesar 0,68% untuk CSFB preparation success rate dan 3.25% untuk CSFB execution success rate.
Teknologi akuakultur bioflok merupakan metode menjaga kualitas air dalam budidaya ikan. Penjagaan kualitas air dilakukan dengan mengubah nitrogen anorganik menjadi nitrogen organik yang tidak bersifat toksik menggunakan bakteri. Bakteri ini dapat mengkonversi limbah organik menjadi kumpulan mikroorganisme berbentuk flok yang dimanfaatkan oleh ikan sebagai sumber makanan. Namun metode bioflok memerlukan pemantauan air secara teratur untuk menjaga kualitas air. Oleh karena itu pada penelitian ini dirancang bangun sebuah sistem yang dapat menjaga kualitas air pada kolam ikan bioflok berdasarkan suhu air, TDS air, dan pH air menggunakan komunikasi Long Range agar dapat memantau dan mengontrol kolam dari jarak jauh. Alat yang digunakan untuk komunikasi Long Range adalah LoRa RFM95W. Hasil pengujian pengiriman data menggunakan LoRa dalam keadaan LOS dapat diterima hingga jarak 300 meter dengan nilai RSSI adalah -100dBm. Semua sensor dapat bekerja dengan baik seperti sensor suhu air, TDS air, dan pH air yang dapat membaca perubahan nilai yang terjadi pada air kolam bioflok tiap waktu. Selain itu, pemberian pakan ikan secara otomatis dapat dilakukan sesuai jadwal yang ditentukan dengan bantuan modul RTC. Respon yang diberikan saat kondisi air tidak dalam batas normal juga dapat berjalan baik dengan menyalakan buzzer dan menampilkan notifikasi pada aplikasi.
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