Martinus Mujur Rose’s scientific contributions

Microstrip antennas using jeans substrates have advantages in ease of manufacture, flexibility of use because they are flexible and fashionable, and are very suitable for application in telemedicine devices with the application of Industrial, Scientific and Medical or ISM frequency bands. In this study, the use of a microstrip antenna with a textile substrate was designed with CST studio simulation software to obtain antenna performance according to the expected working frequency, namely at a frequency of 915Mhz. From the results of the initial calculations and design, the patch size obtained is 172,817mm for the patch width value and 126,7476mm for the patch length value. In testing the vswr value, the vswr value is at a value of 14 before optimization and 1.2 after optimization. In testing the S parameter value, it produces a reading of -23 after optimizing the initial value of -3.7 db. The impedance value recorded is 50ohm from the previous value of 47.4ohm so that it is in accordance with the output impedance characteristics originating from Loa915 mhz.

The increasing use of vehicles, especially motorbikes, has the potential to increase motor vehicle theft cases. The increase in motorcycle theft cases can occur due to the weakness of the owner in installing a motorcycle security system, so that it has the potential to experience losses due to theft. An indication of the problem is how to develop an application that can be used to carry out tracking that can display the position of the vehicle with integrated maps and vehicle control remotely in the event of a vehicle theft. The development of Internet of Things (IoT) technology as well as information and communication technology can now be used to develop an application for wireless vehicle monitoring and control. So that it can make it easier for vehicle owners to track and control the vehicle to minimize vehicle loss. In this study using MIT App Inventor as an application development platform and using ThingSpeak as an IoT database server. Furthermore, the application will be integrated with the Tracking Device device consisting of a microcontroller, Global Positioning System (GPS) module, and a DC relay installed on the vehicle, utilizing an internet connection as a link between the application and the tracking device. The result is that vehicle position data can be displayed through a mobile application with map visualization integrated with google maps and the user can turn off or turn on the vehicle through the application with the farthest distance that has been successfully tested of 141 km. The time for the tracking device to respond to commands from the application varies from 5 to 20 seconds depending on the strength of the internet connection used. Keywords : Internet of Things (IoT), Tracking Device, Global Positioning System (GPS), mikrokontroler.

Pencemaran udara merupakan suatu masalah yang berdampak buruk bagi kehidupan makhluk hidup, terutama di kota-kota besar dan industri yang semakin hari semakin meningkat pencemaran udaranya. Media dan teknik penyampaian kualitas udara yang kurang informatif menjadi pemicu rendahnya kesadaran masyarakat terhadap kondisi lingkungan yang berdampak terhadap kualitas udara, oleh karena itu diperlukan sistem monitoring kualitas udara. Pada penelitian ini dirancang sebuah web yang berfungsi untuk monitoring serta sebagai media informasi untuk mengetahui kualitas udara, web monitoring tersebut akan digabungkan dengan Wireless Sensor Network sebagai alat perangakat keras (hardware) yang akan membaca dan mengambil data dari node-node sensor yang ada pada hardware wsn tersebut. Penelitian ini diharapkan dapat membantu masyarakat mengetahui kualitas udara pada lingkungan sekitar, sehingga bisa melakukan pencegahan dini terhadap kualitas udara yang tidak baik, karena apabila kualitas udara tidak baik maka akan berdampak buruk pada kesehatan masyarakat itu sendiri .

Hampir setiap kendaraan pasti perlu perawatan seperti ganti oli, ganti ban, air radiator, rem, bagianmesin dan masih banyak lagi. Namun, terkadang pemilik kendaraan kurang peduli dengan kondisikendaraannya dan seringkali mengabaikan perawatan tersebut. Hal ini bisa berdampak buruk,bahkan bisa mengakibatkan kecelakaan. Oleh karna itu,sistem monitoring ini dirancang untuk memonitoring level air radiator pada tangki kendaraan. Sensor ultrasonik akan mengukur ketinggianair radiator pada tangki reservoil. Jika level air radiator pada tangki rendah maka pompa secaraotomatis akan mengisi ulang air radiator dan buzzer akan berbunyi lebih cepat. Data dari sensorultrasonik akan dikirim ke mikrokontroler dengan logika fuzzy. Pemilik kendaraan dapatmengakses informasi berupa ketinggian level air radiator di dalam tangki melalui modul wifiWemos ESP8266 sehingga keadaan bagian dalam pada kendaraan dapat dimonitroing dan diatasidengan cepat, mudah, dan efisien.