Judul: Etnobotani dan potensi tumbuhan berguna di Taman Nasional Gunung Ciremai, Jawa Barat
Abstrak: The people around TNGC have a very close interaction with the surrounding natural resources as can be seen when they deal with the use of plants (ethnobotany). Documenting the people‟s knowledge in TNGC ethnobotany is especially important so that the knowledge of TNGC people in the use of these plants can be preserved. This study aimed to identify the use of plants by the people around TNGC (etnobotany) and to find out the potential of useful plants in the TNGC region. Ethnobotany study was conducted by interviews and the potential of useful plants in the TNGC region was learned through a vegetation analysis. The number of species obtained from the ethnobotany results was 131 species and 62 families. Medicinal plants were among the much used reaching 37 species. The number of spesies obtained from the results of vegetation analysis was 99 plant spesies and 43 families residing in the TNGC area. The most useful plant species were plants producing buildings as many as 14 species. Out of 131 plant that were used by community, many them were not be found in the area of TNGC reached 113 species, whereas plants that were aas many as 18 species. Of all the plants obtained from the ethnobotany results and vegetation analysis, 10 superior species can be develoved by communities around the TNGC area, for example, nilam (Pogostemon cablin) as aromatic material and raw material for the manufacture of perfume and ground orchids with yellow flowers (Phaius flavus ) for ornamental plants. These superior species if well-cultivated are expected to help TNGC community improve their income.
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Judul: Kajian etnobotani masyarakat di sekitar Taman Nasional Gunung Merapi: studi kasus di Desa Umbulharjo, Sidorejo, Wonodoyo dan Ngablak
Abstrak: Mount Merapi National Park (TNGM) has total an area about 6410 ha, with the details: in Central Java Province about 5126.01 ha and in Province of Yogyakarta Special Region about 1283.99 ha. By looking at the potential of plants and community culture in TNGM region (in the terms of plant utilization) allows interaction between community and that region. Therefore, the study of ethnobotany community around TNGM region needs to be done. The purpose of this study are to know and identify the various utilization of plants by community around TNGM and also to know kind of interaction between community and potential plant diversity in TNGM region. The research was conducted in 4 (four) villages in the surround TNGM region included the Village Umbulharjo, Sidorejo, Wonodoyo and Ngablak. This research carried out about 2 months that started from June to August 2010. The method used in this research was a field survey. The activities undertaken in this research included interviews, making of herbarium, data processing and data analysis. The data was collected in the form of primary data (ethnobotany) and secondary data (general conditions of the location). Primary data collection techniques was conducted through interviews with the respondents (people around TNGM) whereas secondary data was done through literature studies. Based on research results, indicate that the characteristics of respondents in the surround TNGM that most livelihood as farmers and low educated (Elementary School), with the largest age rate is 16-40 years. Plants that used by the community about 103 kinds, and can be differentiated into eleven groups of functions, namely medicinal plants (47 kinds), ornamental (11 kinds), aromatic (7 kinds), food (40 kinds), fodder (7 kinds), botanical pesticides (4 kinds), dyes and tannins (2 kinds), firewood (10 kinds), ceremonies (13 kinds), building materials (20 kinds) and also rope materials, wicker and crafts (6 kinds). Community around TNGM has a level of interaction with Merapi volcano which close enough. This can be seen from the social and cultural developing. The suggestion needs to be done from this study results is further development of the useful plants utilization in order to increase the community income around TNGM, especially after Mount Merapi eruption through kinds cultivation based on traditional knowledge of the society.
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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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