Judul: Modifikasi Pengendali Traktor Otomatis dan Rancang Bangun Unit Pengendali Tuas Transmisi Maju - Mundur Menggunakan ATMega 128
Abstrak: Otomatisasi sistem pengendalian traktor atau yang biasa disebut otomasi traktor adalah pengendalian traktor yang semua kegiatan operator dikendalikan secara otomatis oleh sistem. Pengembangan otomasi traktor juga mencakup salah satu tujuan precision farming yaitu tepat lokasi. Smart Tractor merupakan salah satu pengembangan otomasi traktor. Untuk memperkecil radius putar yang besar saat berbelok traktor dilengkapi rem kanan-kiri yang dapat dikendalikan secara terpisah. Modifikasi pengedalian rem dan transmisi maju-mundur untuk meningkatkan kemampuan traktor untuk bergerak. Modifikasi rangkaian elektronika dilakukan pada ATMega 8535 yang memiliki 20 pin I/O menjadi ATMega 128. Modifikasi dan pengujian traktor mengikuti kaidah umum rancang bangun. Ketiga unit mekanisme yang dibuat digerakkan menggunakan motor listrik DC. Daya yang dibutuhkan oleh tuas transmisi, pedal rem kanan dan kiri adalah 31.6 Watt, 13.78 Watt, dan 12 Watt. Uji kinerja otomasi p
Keyword: ATMega 128, Otomasi, Traktor

Judul: Rancangbangun Sistem Pengendalian Tuas Pengendali Implemen untuk Otomatisasi Traktor.
Abstrak: Modern farming is indicated by the use of agricultural tools and machines that substitute human labor. In the process of land preparation, planting, plant preservation, and harvesting, the use of human labor has been reduced and replaced by agricultural machines. The objective of this research was to modify the implement control system for automatic land plowing. The design was using a sprocket-chain mechanism that was connected to the control lever, there after the lever could be moved in back and forward directions. The sprocket was rotated by a DC motor that was controlled by a micro controller passing through H-Bridge device, thereby the lever could be ascend and descend easily by changing the direction of DC motor’s rotation. A potentiometer had been used to measure the rotation angle as the output of the lever position. The scale change at the potentiometer was converted to a digital data by the micro controller and would be used as a feedback. At the field performance test, the prototype was tested to control the depth of a disk plow in a tillage operation using a 4-wheel tractor. The test result showed that, the control system could control the plowing depth in the average of 19 cm at the 350 ADC setting, and 13 cm at 450 ADC setting.
Keyword: design, implement, control, smart tractor

Judul: Durability of Specific Immunoglobulin (Ig) Y Againts Influenza and Covid-19 in Sunscreen
Abstrak: The benefit of specific immunoglobulin Y (Ig Y) as an active ingredient in personal care products such as sunscreen has not been properly studied. Our study aims to evaluate the reliability of specific IgY against influenza and the COVID-19 virus in a sample sunscreen product. Specific IgY influenza and COVID-19 viruses were inserted in the sample sunscreen at two concentrations of 0.1% and 0.25%. Three treatments were observed: control (C) sunscreen without IgY, treatment 1 (T1) sunscreen with 0.1% IgY, and treatment 2 (T2) sunscreen with 0.25% IgY. Organoleptic observations were carried out to monitor changes in aroma, color, and texture, and sunscreen sampling was done every week for 6 weeks. The durability of IgY was evaluated using an enzyme-linked immunosorbent assay (ELISA) and a neutralization assay. Organoleptic observation from weeks 1 to 6 showed consistency in its aroma, color, and texture. Enzyme-linked immunosorbent assay and neutralization assay (NA) results of the T1 and T2 groups showed negative results except for sample T1 at week 5, which showed a positive result in the Influenza A ELISA. Based on the results, it seems that IgY concentrations of 0.1% or 0.25% were not optimal. However, this negative result might be due to low concentration of the IgY and the presence of beeswax, which inhibits IgY and causes it to dissolve in distilled water, thus preventing it from being detected in the assay.
Keyword: Immunoglobulin Y, Sunscreen, Influenza, COVID-19, Biological Activity