Judul: Analisis Rantai Pasok Cabai Rawit di Kota Bogor
Abstrak: Cabai rawit merupakan salah satu tanaman hortikultura yang banyak dibudidayakan oleh petani di Indonesia karena banyak dibutuhkan di kalangan masyarakat sampai skala industri. Analisis dilakukan dengan menggunakan metode Food Supply Chain Networking (FSCN) yang terdiri dari analisa situasional, analisa deskriptif, dan analisa efisiensi rantai pasok. Penelitian ini menganalisis secara deskriptif pada lima elemen yaitu sasaran rantai pasok, struktur jaringan rantai pasok, manajemen rantai pasok, proses bisnis rantai pasok, dan sumber daya rantai pasok. Efisiensi rantai pasokan cabai rawit di Kota Bogor dianalisis dengan menghitung marjin pemasaran dan farmer’s share untuk melihat kinerja rantai pasok. Hasil penelitian menunjukan bahwa pola saluran pemasaran 3 adalah pola saluran pemasaran yang paling effisien dengan nilai farmer’s share 43.75% dan marjin pemasaran 56.25%. Saluran 3 terdiri dari Petani – Pasar Induk Kemang – Pasar Jambu Dua – Konsumen. Sementara nilai efisiensi paling rendah ada pada saluran 8 dengan nilai farmer’s share sebesar 23.33% dan marjin pemasaran 76.67% dimana saluran 8 terdiri dari Petani – Pasar Induk Kemang – Pasar Jambu Dua – Pengolah X – Konsumen. Saluran rantai pasok yang efisien adalah saluran yang memiliki marjin pemasaran paling rendah dan farmer’s share paling tinggi.
Keyword: Bird’s eye chili, Bogor City, efficiency, farmer’s share, marketing margin

Judul: Analisis Efisiensi Rantai Pasokan Cabai Merah Keriting Kota Bogor
Abstrak: Red chili is one of the priorities of Indonesian agricultural commodities. Red chili-based industrial development has a high prospect. The research will focus on the analysis of the liniers members of the supply chain in Bogor red chili from the wholesaler to the end consumer. Besides analyzing the secondary members are involved in the supply chain of red chili. This research will also analyze the supply chain of red chili outside the city of Bogor to the wholesaler to be distributed to consumers. Supply chain efficiency can be measured by the efficiency of the marketing approach. marketing efficiency value can be an advantage to the marketing margin calculations. Marketing margin has been calculated from the overall marketing channel marketing margins are expected to know the highest to the lowest. The most efficient supply channels which supply channel 1 (Author- wholesalers Kemang-Retailers Warung Jambu-consumert). Supply channel 1 has a low operating cost allocations compared to seven other operational channels Rp. 2436.00 - and a profit of Rp. 2564.00 - so the marketing margin of Rp. 5000.00 -.
Keyword: margin, supply chain, red chili, efficiency

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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