Judul: Design of dodos knife for palm harvesting with oblique blade
Abstrak: Kelapa sawit merupakan tanaman industri penghasil minyak sawit yang dapat diproses menjadi minyak goreng, minyak industri, dan bahan bakar (biodiesel) . Proses pemanenan terdiri dari memotong tandan buah matang, memotong pelepah, mengutip brondolan, dan membawa tandan ke tempat pengumpulan hasil sementara. Proses pemotongan tandanlah yang memerlukan energi paling besar. Tujuan dari penelitian ini adalah merancang dan membuat pisau dodos yang akan digunakan untuk pemanenan kelapa sawit , menganalisis teknik pisau dodos yang akan dibuat , dan membandingkan gaya potong yang dihasilkan oleh dodos mata pisau datar dengan mata pisau miring . Hasil penelitian ini didapatkan rancangan pisau dodos dengan kemiringan mata pisau 35° yang bisa memperkecil gaya untuk memotong tandan kelapa sawit. Gaya rata-rata yang dihasilkan untuk memotong tandan kelapa sawit pada pohon tahun tanam 2007 sebesar 579.77 N untuk mata pisau datar dan 453.22 N untuk kemiringan mata pisau 35° , sedangkan pada pohon tahun tanam 2009 rata-rata gayanya adalah 679.83 N untuk mata pisau datar dan 483.63 N untuk kemiringan mata pisau 35°.
Keyword: palm, harvesting, dodos, cutting

Judul: Studi Antropometri dan Gerak Kerja Pemanen Kelapa Sawit serta Aplikasinya untuk Penyempurnaan Desain Alat Panen Sawit (Egrek dan Dodos)
Abstrak: Oil palm harvesting process using conventional tools named pole and curve knife and chisel may cause risk of injury. Good matching and compatibility between human and tools dimensions is necessary to gain optimum performance. So an anthropometric approach in order to obtain an ergonomic design is needed. The purpose of this study was to analyze suitable dimentional of pole and curve knife and chisel based on natural range of motion and anthropometric data of harvester’s, and to recommend a better design of pole and curve knife and chisel which are more ergonomic. The result range of motion analysis show that the upper body such as the neck, shoulder and forearm determine the level of risk and can cause risk of injury. Simulation result obtained an egronomic stem length of chisel is 1 meter with 3 connected stem, and seen from technical aspect is 1.5 meter with 2 connected stem. While the length of pole and curve knife stem is 4 meter with 5 connected stem. In addition to that, this research revealed that the total length of pole and curve knife stem needed in a certain harvesting activity can be formulated as : ( ) , where h is the high of cutting target, t is the high of harvesters.
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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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