Judul: Pengembangan Sistem Informasi Tanaman di Kebun Raya Bogor Berbasis Android
Abstrak: Bogor Botanical Gardens (BBG) is the third largest botanical garden in Indonesia. There are 13697 specimens in BBG, which are grouped into 3441 species, 1265 genus, and 220 families in an area of 87 hectares. The absence of an application which can provide information about the plant and its location causing difficulties for users to gain detail information and location of a plant to be visited. The purpose of this research was to build a plant information systems at BBG by integrating geographic information system (GIS) on Android. This system was expected to help users to see detail information of plants and can guide them to the area location they want to visit. The research was conducted in several stages, started with planning, analyzing system requirements, system design, system implementation, and maintenance. The test results shown that the system was able to work well and produce the expected output
Keyword: Bogor Agricultural University (IPB), Information System., GIS, Bogor Botanical Garden, Android

Judul: Pembangunan Aplikasi Android Informasi Tumbuhan Berbasis Geospasial di Kebun Raya Bogor
Abstrak: Kebun Raya Bogor merupakan tempat penelitian dan pariwisata edukasi tumbuhan tropis. Papan tumbuhan adalah salah satu fasilitas yang disediakan Kebun Raya Bogor. Papan tumbuhan berfungsi untuk menginformasikan jenis tumbuhan yang dilestarikan. Sedikitnya informasi yang dimuat dan kerusakan pada beberapa papan tumbuhan menyebabkan fungsinya menjadi kurang efisien. Penelitian ini berupaya menghadirkan sebuah solusi atas permasalahan tersebut. Solusi yang diajukan adalah membangun aplikasi informasi tumbuhan pada smarthphone Android. Aplikasi tersebut dapat meningkatkan efisiensi informasi tumbuhan melalui sebuah antarmuka yang ditampilkan. Global positioning system menjadi salah satu teknologi yang dimanfaatkan untuk mendeteksi informasi tumbuhan berbasiskan geospasial. Formula Haversine berfungsi untuk mengkalkulasi jarak dari lokasi relatif tumbuhan terhadap lokasi user saat ini. Pengujian aplikasi pada 2 tipe smartphone yang berbeda memberikan performa yang cukup baik. Persentase rata-rata akurasi tepat mendeteksi sebesar 66% dan 73%. Aplikasi yang telah dibangun mampu mendeteksi posisi dan menampilkan antarmuka informasi tumbuhan yang lebih lengkap.
Keyword: Android, Bogor Botanical Garden, Geospatial, Plant information, Smartphone, Efisiensi informasi, Global positioning system, Akusisi data, Informasi tumbuhan

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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