Judul: Evaluasi Implementasi Total Productive Maintenance Unit Produksi Urea 1A PT Pupuk Kujang
Abstrak: Ketersediaan pupuk berkualitas dan mampu mencukupi kebutuhan produksi sangat dibutuhkan untuk usahatani. Tingginya downtime menyebabkan produktivitas turun. Total Productive Maintenance (TPM) merupakan proses pemeliharaan secara produktif yang melibatkan sumber daya manusia untuk mendapatkan efisiensi peralatan. Tujuan penelitian yaitu (1) identifikasi penerapan TPM (2) menghitung kinerja TPM dan (3) menyusun rekomendasi implementasi TPM yang efektif. Metode penelitian yaitu analisis deksriptif, perhitungan TPM (MTBF, MTTR, OEE), dan diagram fishbone. Hasil penelitian menunjukkan rata-rata nilai OEE selama bulan Januari hingga Juli 2016 masih dibawah standar menurut Japanese Institute of Plant Maintenance (JIPM), dimana rata-rata nilai availability sebesar 97 persen, nilai performance sebesar 82 persen dan nilai quality sebesar 98 persen. Rendahnya nilai OEE karena rendahnya nilai performance dipengaruhi oleh metode yang diterapkan belum optimal yaitu MTTR tinggi dan waktu penyetelan tidak konsisten
Keyword: Overall Equipment Effectiveness, produksi, Pupuk Kujang, Total Productive Maintenance

Judul: Analisis Penerapan Total Productive Maintenance di PT XYZ
Abstrak: Total Productive Maintenance (TPM) is a maintenance concept that aims not only to improve productivity but also to improve morale and workers responsibilities to do they own job. The main objective of this research was to find the best strategy to improve the performance of TPM through the autonomous maintenance (AM) programs on the line sachet D as the line model of TPM implementation. Performance of TPM programs was measured based on measuring the value of Overall Equipment Effectiveness (OEE). OEE as measurement methods of the production machine effectiveness that involves measurement of the availability rate, performance rate, and quality rate. This method becomes a key factor in the productivity measurement of the production process. The best alternative strategy was determined by using of Analytical Hierarchy Process (AHP) model. Improvement was focused on reduced the cleaning and inspection time which is one of the highest downtime on the line sachet D. The result of this research will be able to identify the factors which influent productivity and to provide the best improvement strategy.
Keyword: 

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
Keyword: