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.
Keyword: 

Judul: Rancang Bangun Sistem Pengendalian Nirkabel Pada Pengemudian Traktor Mini
Abstrak: The research dealt with the development of wireless control tractor operation based on SPC Wireless Gamepad Interface module. Two operation were controlled, those were steering of tractor and operation of throttle. Steering was controlled using DC gear motor 38 Watt. Mechanism to rotate the steering wheel was using pulley and timing belt. Mechanism to control throttle was using linkage mechanism. Several sensors were attached to the tractor, those were obstacle detection sensors and turning angle sensors. Ultrasonic sensors for obstacle detection, measure the distance of obstacle in front of the tractor. The distance can be measured by ultrasonic sensors between 2 until 300 cms. This system was controlled by a microcontroller unit. When there was an obstacle in front of a tractor ≤150 cm, then buzzer will ringing. The ringing of buzzer indicate that the tractor within danger. To know turning angle of tractor used linear potentiometer through results recitation of ADC (Analog to Digital Converter). From the test result shown that ADC data was linear when tractor turn to the left or to the right. It was can be seen from equation Yleft=0.0282X+885.8 and Yright=-0.266X+885.8. Similarly, control throttle mechanism was also installed linear potentiometer to determine percentage of throttle, the test results showed that the linear equation Y=-0.838X +916.8. The maximum range of tractor controlling system with SPC Wireless Gamepad Interface module was 125 meters.
Keyword: 

Judul: Komposisi Asam Lemak dan Kolesterol Udang Ronggeng (Harpiosquilla raphidea) akibat Perebusan.
Abstrak: Udang merupakan makanan yang memiliki cita rasa yang khas dan lezat serta banyak diminati oleh masyarakat. Kandungan gizi yang khas pada udang salah satunya adalah asam lemak tak jenuh majemuk yaitu omega-3 yaitu eucosapentanoic acid (EPA) dan docosahexanoic acid (DHA), serta Omega-9 yaitu oleat. Oleh karena itu, sangat perlu untuk dilakukan penelitian mengenai gizi yang terkandung dalam udang ronggeng, terutama komposisi asam lemak dan kolesterolnya. Asam lemak memiliki fungsi yang penting bagi tubuh manusia, linoleat (Omega-6) dan linolenat (Omega-3) digunakan untuk menjaga bagian-bagian struktural dari membran sel, serta mempunyai peran penting dalam perkembangan otak. Asam lemak Omega-3 dapat menyembuhkan luka dan infeksi, trombosis, penyakit tulang atau persendian, asma, dan mencegah proses penuaan. Komponen utama kolesterol pada udang adalah high density lipoprotein (HDL) yang berfungsi mengurangi low density lipoprotein (LDL) dalam tubuh sehingga mampu mencegah penyakit arterosklerosis. Penelitian ini bertujuan untuk mengetahui pengaruh perebusan terhadap karakteristik, komposisi kimia dan profil asam lemak serta kandungan kolesterol daging udang ronggeng. Tahap awal penelitian ini adalah memperoleh informasi mengenai asal sampel, metode penangkapan, serta penanganan udang ronggeng. Tahap selanjutnya adalah mengkaji karakteristik udang ronggeng, yaitu ukuran, rendemen, cita rasa, komposisi kimia dan asam lemak serta kolesterol daging udang ronggeng. Udang ronggeng yang digunakan terdiri dari udang ronggeng segar dan udang ronggeng yang diberi perlakuan perebusan . Rendemen daging, cangkang, dan jeroan udang ronggeng segar berturutturut 41,27%, 54,15%, dan 4,59%, sedangkan rendemen udang rebus berturutturut yaitu 20,08%, 45,32%, 1,69% dan berat yang hilang (lost) sebesar 32,90%. Komposisi kimia yang meliputi kadar air, abu, lemak, dan protein daging udang ronggeng segar berturut-turut 76,55%; 1,27%; 1,54%; dan 20,42%; udang rebus, yaitu 74,09%; 1,39%; 22,46%; dan 0,83%. Asam lemak jenuh daging udang ronggeng yaitu miristat, palmitat, stearat dan didominasi oleh palmitat sebesar 29,23%. Total asam lemak jenuh daging udang ronggeng segar, yaitu 33,90% dan udang rebus yaitu 30,58% dari total asam lemak udang. Total asam lemak tak jenuh tunggal terdiri dari oleat yaitu pada daging udang ronggeng segar 20,61% dan udang rebus, yaitu 19,26%. Asam lemak tak jenuh majemuk udang ronggeng segar adalah linoleat, yaitu 14,97% dan linolenat, yaitu 7,69% dan udang rebus yaitu linoleat sebesar 8,9% dan linolenat sebesar 5,6%. Asam lemak tak jenuh mejemuk berantai panjang udang ronggeng segar terdiri dari EPA sebesar 7,49% dan DHA sebesar 7,17%, sedangkan EPA udang rebus, yaitu 7,17% dan DHA sebesar 0,95%. Total kolesterol udang ronggeng segar yaitu 115,33 mg/100 gram dan udang rebus 86,61 mg/100 gram.
Keyword: