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: Feasibility Study of Business Development Teteh Sari Rice Galangal Crackers in Bogor City
Abstrak: Usaha pengolahan tanaman biofarmaka memiliki potensi yang besar terutama di kondisi pandemi ini. Kencur adalah tanaman biofarmaka yang memiliki banyak khasiat untuk kesehatan. UMKM kerupuk simping beras kencur Teteh Sari adalah usaha pengolahan kerupuk kencur yang memiliki rencana pengembangan yaitu dalam pembangunan rumah produksi dan pengadaan mesin dan peralatan produksi. Penelitian ini bertujuan untuk menganalisis kelayakan pengembangan usaha UMKM kerupuk simping beras kencur Teteh Sari yang akan dilakukan. Analisis Kelayakan yang dilakukan meliputi aspek non finansial dan aspek finansial. Hasil aspek non finansial, rencana pengembangan usaha layak dijalankan berdasarkan skor kelayakan pada masing masing aspek non finansial melebihi 50 persen. Hasil analsis aspek finansial memperoleh nilai NPV sebesar Rp220.345.204, IRR sebesar 80,42 persen, Net B/C sebesar 6,44, dan Payback Period sebesar 2,85 tahun sehingga secara finansial rencana pengembangan usaha layak dijalankan karena melebihi kriteria syarat kelayakan. Berdasarkan analisis switching value menunjukkan bahwa usaha sensitif terhadap penurunan jumlah produksi, Biopharmaca plant processing business has great potential, especially in this pandemic. Galangal is a biopharmaceutical plant that has many health benefits. Teteh Sari is a galangal cracker business that has a development plan in the form of house building production and procurement of production machinery and equipment. This research was conducted to analyze the feasibility of development plan by Teteh Sari galangal cracker business which will be carried out. Feasibility analysis includes non-financial and financial aspects. As a result of the non-financial aspect, the business development plan is feasible to run based on the feasibility score for each non-financial aspect above 50 percent. The results of the analysis of the financial aspect obtained an NPV value of IDR 220.345.204, an IRR of 80,42 percent, a Net B / C of 6,44, and a Payback Period of 2,85 years so that the business development plan is financially feasible because it pass the eligibility criteria. Based on the switching value analysis show that the business is sensitive to a decrease in the amount of production.
Keyword: Kelayakan, kencur, kerupuk, pengembangan bisnis

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: