Judul: Model optimasi pendistribusian logistik bencana alam
Abstrak: Logistics distribution in emergency situations involves dispatching commodities (medical materials, specialized rescue equipment and rescue teams, food, etc.) to the affected areas. The optimization process is done by combining the optimal logistics distribution with vehicles scheduling, such that quantity and capacity loads of every vehicle is satisfied. At the end of logistics distribution process it is possible that there is unsatisfied demand in affected area. The minimization of unsatisfied demand can be regarded as an integer linear programming problem (ILP). The problem can be solved using branch and bound method. Optimal value is obtained using Lingo 8.0 Unlimited software.
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Judul: Optimasi biaya antisipasi bencana alam
Abstrak: Upaya antisipasi dalam menghadapi suatu bencana alam sangat penting dilakukan untuk meminimalkan dampak yang ditimbulkan apabila bencana alam terjadi. Dalam kaitan ini, salah satu usaha yang harus dilakukan adalah perencanaan sistem logistik bagi pemenuhan kebutuhan bahan pokok dan obat- obatan yang dibutuhkan jika terjadi bencana. Salah satu hal yang harus dilakukan adalah menentukan lokasi pembangunan depot yang optimal untuk menyimpan logistik serta rute dan frekuensi pengiriman ke daerah bencana dengan biaya minimal. Permasalahan ini dapat dimodelkan sebagai suatu pemrograman linear bilangan bulat. Model ini diimplementasikan untuk kasus di Provinsi Jawa Barat. Dengan model ini dihasilkan lokasi depot-depot optimal serta rute dan frekuensi pengiriman bahan pokok glan obat-obatan dari depot ke lokasi terjadinya bencana….
Keyword: Anticipation, Integer linear programming, Natural disaster, Optimization

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4