Judul: Etnobotani Pangan Suku Matbat di Pulau Misool Kabupaten Raja Ampat Papua Barat
Abstrak: Indonesia community consists of various ethnic groups who have different knowledge of food plants. However, there is documentation about knowledge and utilization of food plants. The documentation can be done through ethnobotanical study. Purpose of the research was to identify the diversity of the used of food plants by the matbat ethnic. The research was conducted in Tomolol village, Misool islands of Raja Ampat, West Papua, on August-September 2012. The data was collected through observation and interview using purposive sampling method. Based on this research, the ethnic used 63 species of 33 families was the food plants with a predominance of family Arecaceae. The plants were mostly found in the yard and garden, and there were 11 species found wild in lowland forests. People In this ethnic still found nomadic farming system model with traditional agroforestry gardens. Traditional knowledge identified the forbiddean or moratorium the used of plants called “sasi”
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Judul: Keanekaragaman Tumbuhan Pangan dan Obat pada Masyarakat Suku Mbaham Mata di Kampung Werabuan, Kabupaten Fakfak
Abstrak: The society of Papua still depends on forest resources, plants and animals, to fulfill their daily needs. Particularly, the utilization of food and medicinal plants has been done hereditarily until now. The aim of this research is to identify the diversity of food and medicinal plants, also to identify the local wisdom of Mbaham Mata Tribe on the utilization of plant resources. Data collection was done using semi-structured interview and snowball technique. Food plant species which is identified as much as 35 species from 21 family, while medicinal plants are 41 species from 28 family. Beside that, there are 25 species which is identified from 21 family which are utilized as functional food plant. Functional food plant is plants that has double function, as food and also medicine. The society of Mbaham Mata Tribe is still utilizing available plant resources and there are some rituals on doing conservation activities. The local wisdom of the society on plant conservation can be seen on the sasi installation ritual, prohibition to enter the forest, nahahara.
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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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