Judul: Topology Optimization and Strength of Knuckle Joint on Four Wheel Tractor Using the Finite Element Method
Abstrak: Simulasi dengan metode finite elemen dapat mendukung mekanisasi produksi di dunia pertanian, termasuk dalam pertumbuhan produktivitas dalamsuatu pekerjaan. Namun, ada satu masalah yang terjadi pada komponen traktor, yaitu fracture pada knuckle joint. Knuckle joint akan dianalisis kekuatannya melalui simulasi menggunakan Metode Elemen Hingga atau dengan perangkat lunak Ansys. Simulasi dilakukan dengan menganalisis beban dinamis pada knuckle joint dan melakukan optimisasi topologi. Dengan menguji beban dinamispada knuckle joint menggunakan perangkat lunak simulasi Ansys dalam hal tegangan setara 245.770.000.000 Pa, regangan elastis setara 1,6805 m/m, dan deformasi total 0,25588 m. Selain itu, dalam penelitian ini menganalisis sifat-sifat massa sebelum dan sesudah optimisasi topologi menemukan bahwa perbedaan massa sebelum dan sesudah optimisasi topologi adalah 217,75 gram., Simulation with the finite element method can support production mechanization in the world of agriculture, including in productivity growth in a job. However, there is one problem that occurs in the tractor component, namely fracture of knuckle joint. Knuckle joint will be analyzed for knuckle joint strength through simulation using the Finite Element Method (FEM) or with Ansys software. The simulation is carried out by analyzing the dynamics load on the knuckle joint and performing topology optimization. By testing the dynamics on the knuckle joint using Ansys simulation software in terms of the equivalent stress of 245.770.000.000 Pa, the equivalent elastic strain of 1.6805 m/m, and the total deformation of 0.25588 m. In addiction, in this study an analysis of the properties of the mass before and after topology optimization found that the difference in mass before and after topology optimization was 217.75 grams
Keyword: Finite element method, knuckle joint, topology optimization

Judul: Analisis Perancangan Traktor Ringan (Light Tractor) Satu Roda untuk Lahan Sawah
Abstrak: Light tractor works for fertilization, spraying, and weeding. Rice crops treatment can spend a lot of time and effort, besides that, the conventional tractor couldn’t be done because of the lack of the hard layer. So we need a machine that can simplify the maintenance and shorten time treatment on the rice crops. Static loading analysis using Solidworks 2014. According to average human body weight, the analysis performed by delivering a centralized force of 750 N to main frame. Whereas machine holder were given force evenly of 200 N, and traction wheel were given concentrated load of 700 N. The Von Mises maximum stress value produced on main frame are equal to 19.37 MPa, Von Mises maximum stress value on machine holder are equal to 85.80 MPa, and maximum stress value on traction wheel is equal to 186 MPa. Materials constructions are made of AISI 5140 alloy steel with yield strength value are equal to 293 MPa.
Keyword: Solidworks, traction wheel, machine holder, main frame, static loading analysis

Judul: Perilaku Reproduksi dan Karakteristik Mikrohabitat tempat Bertelur Burung Gosong (Megapodius reinwardtii Dummont 1823) Di Taman Buru Pulau Moyo
Abstrak: Burung gasang (Megapodius reinwardtii) merupakan jenis burung terestrial yang selalu berpasangan sepanjang hidupnya. Burung ini dilindungi berdasarkan SK Menteri Kehutanan No. 882/Kpts-II/1992 tanggal 28 September 1992. Penyebaran satwa ini hanya terbatas di wilayah Indonesia bagian timur.
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