Sistem kelistrikan pada kapal merupakan bagian yang sangat penting dalam operasional kapal. Perancangan sistem kelistrikan yang tepat akan memudahkan pekerja untuk mengerjakan instalsi dan pengecekan di lapangan. Untuk memenuhi kebutuhan listrik, dewasa ini sektor maritim terutama bidang perkapalan menggunakan sistem pembangkit listrik dengan diesel untuk memenuhi kebutuhan daya pada kapal. Daya listrik yang dihasilkan oleh diesel ini harus bisa memenuhi kebutuhan beban listrik pada kapal sehingga perlu di hitung agar memudahkan pemilihan kapasitas diesel untuk memenuhi kebutuhan semua beban listrik kapal. Dalam tugas akhir ini, difokuskan pada studi pemilihan kapasitas generator, pengaman, dan luas penampang kabel hantaran. Pemilihan kapasitas pengaman dan luas penampang kabel hantaran ditentukan berdasarkan besarnya nilai arus nominal beban yang disesuikan dengan Standar PUIL 2000. Berdasarkan perhitungan load factor generator dengan kapasitas generator sebesar 13kVA untuk memenuhi kebutuhan beban maximum pada kapal Ikan 15 GT mencapai 77 %. Sistem transmisi tenaga listrik dari sumber AC menuju titik beban menggunakan jenis kabel NYY 3x25mm2 sedangkan pengaman pusat menggunakan rating MCB 1P 63A. Kata Kunci: kapasitas generator, kapasitas pengaman, luas penampang kabel.
The use of Growth Chart (Kartu Menuju Sehat) all this time was conducted at Posyandu (Integrated Health Service Posts) for monitoring baby’s growth and development is not effective and efficient anymore since the cadres at Posyandu only record the baby’s height and weight that does not determine the nutritional status yet. Several studies on information technology to decrease the human error factors and optimum data storage has been widely developed via some applications, such as web server-based and android-based applications. This study aimed at developing an android-based application system of nutritional status assessment (NSA) for monitoring a baby’s growth and development using a weight-for-age index, weight-for-height index, height-for-age index. The method for developing this android-based application was using supporting devices, such as Android Studio and Visual Studio Code, as the Integrated Development Environment (IDE) and Flutter application as a unit of interface development (UI) and the development of database-driven applications, such as XAMPP software as a bundle for a web server, (Apache) and a database system (MySQL). The result of the study on designing an android-based application of nutritional status assessment at Posyandu could identify the menu of baby’s nutritional status assessment and the database for digital data storage. Furthermore, all in all, the use of this application can perform based on the instruction and be used for baby’s nutritional assessment at Posyandu. For further development, this application can be used for data synchronization in the programs of Posyandu at Public Health Centers.
The resistance requirement of Ship-RUV is very much needed for the maneuvering process by placing the motor and the propeller as the driving force. In this case the propeller and motor components in the Ship-RUV component are installed with a KV 1000 KV motor with 12000 RPM with a number of 6 Motor-propellers. Propeller conditions are installed in the rear and bottom conditions of the Ship-RUV. This function is used for operational movement when the hull of the ship. Where the design of the motor propeller selection is based on the calculation of resistance obtained from the empirical calculation formula. In the calculation of resistance, the amount of resistance of the Ship-RUV is 16 N to be able to move and operate. The condition of the speed of the Ship-RUV in its operation is planned to be able to move in the air reaching a service speed of 5 knots.
X-ray radiation (ionization) cannot be felt directly by the five human senses. Therefore, radiation monitoring is needed, one of which by using a survey meter. The purpose of this research is to directly monitor the level of radiation exposure and leakage of X-ray tube containers in the work area. This was done to ensure the safety and health of workers in the radiation transmission area, so that it is in accordance with the ALARA (As Low As Reasonably Achievable) principle, which is stipulated in the Decree of the Minister of Health RI No. 1250/Menkes/SK/XII/2009 concerning Guidelines for Quality Control of Radiodiagnostic Equipment as Standard Values for X-Ray Radiation Monitoring. This research is an experimental study with a survey meter equipment module design using a Geiger Muller sensor equipped with data storage. This module design method uses Arduino programming as data processing and is displayed on the CHARACTER LCD. Test analysis was carried out by comparing the measurement value of the module with the standard value as a standard for comparison. Based on the measurement results, the X-ray tube leak test value resulted in a standard AAT survey meter value of 0.001 both using a closed and unsupplied 2mm Pb circuit, namely 0.00097 mGy/hour and 0.00092 mGy/hour. Meanwhile, the results of the tube leakage test using a survey meter, both circuits, modules, and standard survey meters show a passing grade test value of < 1mGy/hour. In conclusion, the module design using the Geiger Muller sensor is feasible to use.
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