Judul: Business plan of traditional cassava crackers (enye-enye) Ny. Ing Bogor
Abstrak: Enye-enye adalah salah satu kerupuk tradisional Indonesia yang terbuat dari singkong dengan rasa yang unik. Rasanya enak, renyah, dan gurih. Tujuan utama dari penelitian ini adalah untuk membuat rencana bisnis untuk bisnis enye-enye. Ada dua produk berbeda enye-enye, mereka adalah Enye-enye Ny. Ing Asli dan Enye-enye Ny. Ing Mini. Target pasar enye-enye adalah pasar ritel nasional dan pasar internasional. Studi kelayakan usaha menunjukkan NPV sebesar Rp2 244 099 158, Gross B/C adalah 1.306, Net B/C 3.302, IRR 44.8%, Payback Period 4.344 tahun, dan BEP untuk enye-enye original dan enye-enye mini sebesar 46.704 pcs/tahun dan 13.163 pcs/tahun buah/tahun. Investasi pada bisnis ini harus dipertimbangkan karena semuanya bersifat finansial aspek menunjukkan usaha ini layak dilakukan.
Keyword: enye-enye, business plan, business feasibility

Judul: Analisis Profitabilitas Usaha dan Nilai Tambah Produk Pada Usaha Keripik Singkong Geprek Di Kabupaten Bogor
Abstrak: Cassava chips is one of the processed cassava, which is one of snack. The average of cassava chips in Bogor was done in small and medium scale enterprises that go into home industry. The purpose of this study are analyzing the profitability in 2014, analyzing the value added in 2014, and seeing the the effect of the increasing price on the level of profitability and value added in 2015 with projecting from 2014 of profitability and value added in 2015 with projecting from 2014 of cassava chips ma’nyos of Mr.Unandar.This study was conducted using a survey method. The location was done intentionallyby selecting the business unit cassava chips ma’nyos of Mr.Unandar. The results show that the business is able to generate profits. Value profitability of cassava chips ma’nyos of Mr Unandar is 26.1 percent for 150 and 75 gram, 28.3 pertcent for 130 gram, 25.2 percent for 500 gram, and 4.1 for 20 gram.The analysis shows that the value added of cassava chips of Mr Unandar is 7 013 rupiah with ratio of value added 27 percent.
Keyword: Bogor Agricultural University, value added, cassava chips, profitability, Home industry

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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