Judul: Kajian tekno ekonomi industri kue kering berbahan baku sagu ubi jalar dan kacang hijau di Kabupaten Bogor
Abstrak: Indonesia is a contry with a high population growth and various natural resources. These great natural resources are potential to fulfill the needs of food.Two varietis of Indonesia's agricultural commodities are tuber crops and legumes. Both resources are potential crops to be utilized as source of food. Utilization of local food resources could be developed through its processed product. Product development is focused on creating a new product that meets the consumer requirements. Nowadays consumer require a product that is practical, available in any size, and easy to find. Cookies is a product that fits the criteria, therefore a cookies product with a sago, sweet potato and mung bean as main ingredients is developed.
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Judul: Analysis of the Development of Superior Food Crop Commodities at Subdistrict Level in Bogor Regency
Abstrak: Kabupaten Bogor memiliki potensi dalam pengembangan subsektor tanaman pangan yang berperan besar terhadap perekonomian dan ketahanan pangan daerah. Penurunan luas lahan pertanian menjadi masalah yang dihadapi dalam pengembangan subsektor tersebut sehingga dibutuhkan upaya untuk mengoptimalkan pemanfaatan lahan melalui pengembangan komoditas unggulan. Penelitian ini bertujuan untuk (1) Mengidentifikasi komoditas unggulan tanaman pangan pada tingkat kecamatan di Kabupaten Bogor; (2) Menganalisis tingkat spesialisasi dan lokalisasi dari komoditas unggulan tanaman pangan; (3) Menganalisis prioritas pengembangan komoditas unggulan tanaman pangan pada tingkat kecamatan; dan (4) Menganalisis upaya pengembangan komoditas unggulan tanaman pangan oleh Pemerintah Daerah Kabupaten Bogor. Metode yang digunakan dalam penelitian antara lain metode analisis deskriptif, location quotient (LQ), kuosien spesialisasi, dan kuosien lokalisasi. Hasil penelitian menunjukkan bahwa komoditas tanaman pangan dengan wilayah basis terbanyak di Kabupaten Bogor adalah padi sawah, kacang tanah, ubi kayu, ubi jalar, dan talas. Tidak ada spesialisasi dan pemusatan komoditas unggulan tanaman pangan pada tingkat kecamatan. Semua komoditas tanaman pangan menjadi komoditas yang diprioritaskan untuk dikembangkan pada tingkat kecamatan. Pemerintah Daerah Kabupaten Bogor dan dinas terkait telah melaksanakan Program Peningkatan Produksi, Produktivitas, dan Nilai Tambah Tanaman Pangan yang terdiri dari kegiatan pengelolaan produksi hingga pengolahan dan pemasaran produk hasil pertanian tanaman pangan., Bogor Regency has potential in the development of the food crop subsector, which has a major role in the regional economy and food security. The decrease in the area of agricultural land is a problem faced in the development of this subsector, so efforts are needed to optimize land use through the development of superior commodities. This study aims to (1) identify the superior commodities of food crops at the subdistrict level in Bogor Regency; (2) analyze the level of specialization and localization of superior food crop commodities; (3) analyze the priority of developing superior food crop commodities at the subdistrict level; and (4) analyze efforts to develop superior food crop commodities by the Regional Government of Bogor Regency. The methods used in this study include descriptive analysis methods, location quotient (LQ), specialization quotient, and localization quotient. The results showed that the food crop commodities with the largest base area in Bogor Regency are lowland rice, peanuts, sweet potatoes, cassava, and taro. There is no specialization and centralization of superior food crop commodities at the subdistrict level. All food crop commodities are prioritized to be developed at the subdistrict level. The Regional Government of Bogor Regency and related agencies have implemented the Program to Increase Production, Productivity, and Added Value of Food Crops, which consists of activities from production management to processing and marketing of food crop agricultural products.
Keyword: base area, centralization, location quotient, specialization, superior commodities

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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