Judul: Analisis Kelayakan Rencana Pengembangan Usaha pada UMKM Produksi Tempe Soekardja Kabupaten Banyumas
Abstrak: UMKM Produksi Tempe Soekardja usaha bidang makanan yaitu pengolahan tempe. Harga jual salah satu produk dari UKM kurang dari harga produksinya sehingga diperlukan rencana pengembangan usaha agar bisnis ini tetap menghasilkan keuntungan ekonomis. Tujuan dari penelitian ini yaitu: (1) mengidentifikasi kelayakan rencana pengembangan usaha produk keripik tempe UMKM Soekardja berdasarkan aspek pasar dan teknis serta aspek finansial. (2) menganalisis sensitivitas rencana pengembangan usaha keripik tempe pada UMKM Soekardja. Alat analisis yang digunakan adalah NPV, Net B/C, IRR, Payback Period, dan analisis Sensitivitas Switching Value dengan bantuan perangkat lunak Microsoft Office Excel. Hasilnya, rencana pengembangan layak untuk aspek non-finansial dan finansial. Aspek finansial menunjukkan NPV sebesar Rp 312 128 720.035. IRR sebesar 26%. PP selama 3.53 tahun. Net B/C sebesar 1.96. Besarnya BEP (Rp) yaitu Rp 167 729 130 dan BEP (Q) sebanyak 22364 unit. Analisis sensitivitas menunjukkan batas kelayakan saat jumlah produk rusak adalah sebesar 8%. Penurunan harga jual maksimal akibat produk sejenis adalah sebesar 9%. Peningkatan maksimal biaya yang masih bisa ditolerir pada bahan baku sebesar 21.75% dan biaya operasional sebesar 10.85%.
Keyword: Business development plan, Feasibility, Sensitivity, Tempeh chips, Tempeh, Switching value, Small medium enterprited, Food business, Kelayakan bisnis, Payback priode, Internal Rate return

Judul: Kelayakan Usaha Tempe Skala Kecil dan Menengah di Kecamatan Baleendah Kabupaten Bandung
Abstrak: Tempe is one of many Indonesian traditional food that highly nutritious. The aim of this research was to analyze the feasibility of the 2 scales of tempe business wich are above 100 kg/day scale of business and below 100 kg/day scale of business. Analysis method used was non financial analysis method such as market aspects, technical aspects, management aspects, and legal aspects, social and environmental aspects. Financial analysis was determined by some criterias such as NPV, IRR, Net B/C and Payback Period. Switching value analysis conducted to measure the change of the price increase and decrease in soybean production. The result showed that both of the two scales of tempe business were feasible. The result of switching values analysis showed that on both scales the decreasing of production had more impact on/ was more affecting business feasibility than that of the increasing of soybean price.
Keyword: tempe, price increasing of soybeans, feasibility

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.
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