Judul: Pengujian Kinerja Traktor Mini Dengan Kendali Nirkabel
Abstrak: In untrained situation, unmanned vehicles has been implemented with Artificial Intelligence as robots. The role of the human is still needed, because in many cases robots cannot take the proper decision. The purposes of this research was to test the performance of mini tractor controlled by a wireless device using SPC Wireless Gamepad Interface. Mini tractor used in this research was the Kubota B6100 with modification in steering control system. A remote controlled DC motor was connected to the steering wheel with pulley and belt transmission. An operator with the wireless controller controlled the direction of the tractor by controlling tractor's steering through DC motor. Factors that effected of the operation were operator's visibility, land topography and maximum range of the receiver. Turning radius of a normally operated mini tractor in clockwise direction in average was 2.24 meter and counter clockwise was 2.25 meter. In remote control method, the clockwise turning radius was 2.26 meter dan counter clockwise was 2.29 meter. Tillage test was also conducted using moldboard plow. The result showed that the Effective Field Capacity of a remotely controlled mini tractor was 0.030 ha/h, with 61.0% field efficiency. By using the conventional steering by a operator, the Effective Field Capacity was 0.025 ha/h with 57.7% field efficiency.
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Judul: Pengujian kinerja traktor mini dengan kendali nirkabel
Abstrak: Dalam implementasi di lapangan, operasi alat dan mesin pertanian seringkali dalam kondisi lingkungan yang tidak baik untuk operator, seperti kondisi cuaca yang ekstrim, lingkungan yang tidak sehat hingga berbahaya bagi operator. Unmanned vehicle atau yang lebih dikenal dengan kendaraan tanpa awak sudah diterapkan secara luas pada bidang militer untuk melakukan pekerjaan-pekerjaan yang berbahaya jika dilakukan secara konvensional dengan operator di lapangan, namun pada bidang pertanian implementasi ini masih terbatas. Penerapan robotika pada pertanian sudah diterapkan dengan Artificial Intelligence (AI), namun terbatas pada pengolahan komoditas pertanian pasca panen. Pengembangan unmanned vehicle dalam bidang pertanian di Indonesia, terutama traktor pertanian, dirasakan sangat perlu. Peran manusia tetap diperlukan untuk pengendalian kemudi, karena dalam beberapa hal, traktor robot tidak dapat mengambil keputusan yang tepat dalam menghadapi permasalahan di lapangan. Untuk menjawab permasalahan itu, diperlukan alat dan mesin pertanian yang dapat dikendalikan dari jarak jauh sehingga kegiatan pertanian menggunakan mesin akan lebih aman, nyaman dan mengurangi kelelahan fisik pada penggunanya. Penelitian ini bertujuan untuk menguji kinerja traktor mini (Kubota B6100) dengan sistem kendali secara nirkabel menggunakan remote control SPC Wireless Gamepad Interface pada pekerjaan pembajakan. Kinerja yang akan diuji dalam penelitian ini adalah perbandingan kestabilan arah gerak traktor, besarnya radius putar dan kapasitas serta efisiensi pengolahan antara kendali konvensional dengan operator berada di traktor dan kendali nirkabel melalui alat pengendali jarak jauh (remote control).
Keyword: Tractors, Remote control, Performance test

Judul: Katalis Eterifikasi Gliserol Berbasis Poli–(asam stirena sulfonat) dari Limbah Styrofoam.
Abstrak: Styrofoam waste can be converted to poly–(sulfonate styrene acid) (PSSA) that can be used as catalyst. The objective of this research is to get PSSA that can catalyze the etherification of glycerol and benzyl alcohol. The styrofoam waste was converted to PSSA by reacting with H2SO4 98% (as sulfonation agent) and P2O5 (as sulfonation catalyst) at 40 °C for 6 hours. Characterizations of PSSA included functional groups, sulfonation levels, water swelling, and thermal stability. The yield of PSSA was 40-55%. The success of sulfonated polystyrene was shown by –SO3H group absorption at 1157.29 cm-1. Etherification of glycerol and benzyl alcohol using PSSA catalyst was conducted at 110 °C for 12 hours. The conversion in producing mono–benzyl ether glycerol was 8.10%, 1,3–dibenzyletherglycerol 2.60%, and dibenzyl ether 9.80%. Therefore, the PSSA can be used as etherification catalyst.
Keyword: benzyl alcohol, etherification, glycerol, polystyrene, PSSA