Judul: Analisis unjuk kerja pengontrolan tinggi muka air pada sistem irigasi otomatis menggunakan perangkat berbasis mikrokontroler
Abstrak: Perubahan iklim global dan perubahan pola hujan yang terjadi menyebabkan cuaca sulit di prediksi sehingga menimbulkan ketidakpastian ketersediaan air. Karena itu perlu dicari teknologi yang dapat meningkatkan efisiensi pemberian air irigasi. Pada perkembangan ilmu dan teknologi saat ini, kontrol otomatis memiliki peranan yang penting dalam memberikan kemudahan untuk mendapatkan performansi pada sistem dinamik. Kontrol otomatis dapat mempertinggi laju produksi, meniadakan pekerjaan-pekerjaan rutin dan membosankan yang harus dilakukan operator. Perangkat kontrol otomatis bermacam-macam jenisnya. Smartdatalog merupakan sebuah perangkat data loger otomatis berbasis mikrokontroler yang juga memiliki fungsi kontrol otomatis. Perangkat dapat berfungsi sebagai pengontrol dan pengambil data kemudian menyimpannya sehingga dapat digunakan untuk memonitor pergerakan tinggi muka air tanah pada lahan.
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Judul: Rancangan dan Uji Coba Otomatisasi Irigasi Kendi.
Abstrak: Development of science and technology today make automatic control have important role. It gives us ease to get performance in dynamic system. Automatic control be able to less routine work that operator always do. Automatic control tools have many kinds. Microcontroller ATMega328P is a kind of automatic control. The function is control and record data then save it. Automatic pitcher irrigation system constructions consist on hardware and software. Hardware consist on water level sensor and soil moisture sensor series, microcontroller, stackable SD card shield, real time clock, relay, battery and solenoid valve. Software is a program for microcontroller that used C/C++ language. Each sensor will be calibrated before use. Daily high water level and soil moisture data was data obtained. The data was obtained each 5 minutes. Data in microcontroller was obtained by record data on memory that was set in microcontroller. Calibration results express that microcontroller capability in monitoring high water level and soil moisture has high accuracy. Determination Coefficient calibration equation from the sensor is 0.955 for high water level sensor and 0.887 for soil moisture sensor. Furthermore, set point for control high water level is 5 cm for bottom margin and 14 cm for top margin.
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Judul: Pengaruh Pairing pada Isotop Sn dengan Menggunakan Pemodelan Sembilan Tingkat Energi
Abstrak: Formation of the neutron-rich tin isotopes (Sn isotopes) is the one of the interesting topics in the field of nuclear reaction, especially regarding the stability of the heavy nuclei. Calculations of total energy using the BCS approach using five energy levels can only calculate the total energy up to Sn50132. On the other hand, the experiment continues and has exceeded the formation of isotopes. Therefore, there is need for a new model to accomadate more neutrons. In this research, Sn isotopes is modelled using nine energy levels and constant interaction potential to explain the pairing phenomenon up to Sn50154. However, to obtain more accurate results, other methods to minimize the differences with the experimental results are clearly needed here.
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