Judul: Identifikasi tanaman hias secara otomatis menggunakan Metode Local Binary Patterns descriptor dan Probabilistic Neural Network
Abstrak: Identification house plant species automatically still be a problem for recognizing various kind of house plants. This research proposes a new method for identifying a house plant using Local Binary Patterns (LBP) descriptor and Probabilistic Neural Network (PNN). There are three kinds of LBP descriptor used in this research, i.e. , , and . Database of 300 house plant images belong to 30 different types of house plant in Indonesia are extracted using , , and based on texture feature and classified using PNN. The experimental result shows that has the best accuracy to indentify house plants with accuracy 73.33%. The proposed system is promising since it is capable to identify house plants species efficienty and accurately
Keyword: Plant extraction, Local binary patterns, Texture feature, Probabilistic neural network, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Ekstraksi Tekstur Citra Menggunakan Gaussian dan Multi-Block Local Binary Pattern untuk Identifikasi Tumbuhan Obat
Abstrak: Plants identification automatically is still a uses for recognizing various kinds of house plant species and medicinal plants. This research uses a method Multi-Block Local Binary Pattern (MBLBP) descriptor to extract texture feature and Probabilistic Neural Network (PNN) classifying for identifying a house plants and medicinal plants automatically. There are three kinds of MBLBP descriptor used in this research, i.e., , , , , and , . For training and testing, this research uses database of 1440 medicinal plant leaf images and 300 tree images belonging to 30 different types and obtained from Biofarmaka IPB, Cikabayan Farm, Green house Center Ex- Situ Conservation of Medicinal Plant Indonesia Tropical Forest, and Gunung Leutik. The experimental result shows that the concatination of , has the best accuracy in identifying house plants with an accuracy of 77.78%. It shows that MBLBP method is better than LBP method in identifying house plants based on the increase accuracy by 4.45%.
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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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