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: Sistem Informasi Geografis Ruang Kuliah Kampus IPB Dramaga Berbasis Mobile dengan Platform Android OS
Abstrak: Institut Pertanian Bogor (IPB) which is located in Dramaga, Bogor, West Java has a wide area and has a lot of lecture halls. This has caused many residents of IPB, especially new students have difficulties knowing every location of the lecture halls. Today, GIS technology has been integrated with mobile devices such as Android to ease developer to build an interactive mobile GIS application. The purpose of this study is to develop a mobile-based geographical information system for lecture halls in IPB Dramaga with Android platform that can provide location information using linear sequential model. this research resulted in a mobile GIS application that can display a map from Google Maps which has been added with locations of lecture halls in IPB selected by the user. This application also provide information about distance and signpost between the lecture halls locations and the user location. Another feature is to display information of the lecture halls as images of the lecture halls, faculties, and the building where the lecture halls exist.
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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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