Judul: Etnobotani Kepuh (Sterculia foetida L.): studi kasus pada masyarakat Desa Tepus Kabepaten Gunungkidul
Abstrak: Ethnobotany is the scientific study of the relationships that exist between peoples and plants. Java olive ( Sterculia foetida L.) is one of the species of plants that started rare found in Java. Tepus village of Gunungkidul district are the regional that are still found java olive tree. Output from the research material is consideration java olive preservation. The research was done with the semistructured methods by applying a technique snowball interview and analysis vegetation. Java olive used by community as food fodder, keep water, producing fuel, medicine, and the craft. While the part used which is leaves, bark, fruit, seeds , and wood. The research results obtained 10 individual Sterculia foetida L. (9 individual levels of the tree and 1 individual level of the poles). Tree height of java olive in the Tepus varies from 6 to 20 meters , while in diameter 14 to 115 cm. Tufted herbs java olive was fell around habitats such as petai cina (jumbie bean) , suggar apples , mahogany, kukun, gliricidia, the kapok, and teak. Characteristic of a constituent of habitats kepuh abiotik factor is the average temperature environment 26.5oC with the average moisture 81.9 % and the height of the growing over 100 m asl and under 500 m asl.
Keyword: Bogor Agricultural University (IPB), Tepus village, java olive, Gunungkidul district, ethnobotany

Judul: Kajian Etnobotani Masyarakat Kampung Adat Dukuh Kabupaten Garut, Jawa Barat
Abstrak: The people of Dukuh Cultural Village Garut Regency, West Java are a group of community who live in traditional life pattern, respect the culture and tradition of their ancestor and stay in simply way. The usage of plants traditionally by local people is decrease keep pace with the modern development. This condition may occur to the people of Dukuh Cultural Village. Therefore the study concerning the ethnobotany of local people at Dukuh Cultural Village should be done. This study was conducted during June and September 2009 using literature study, interview and questioner, survey and field invent methods. This study was the early documentation of indigenous knowledge of Dukuh Cultural Village people. It is hopefully the result can be delivered and developed by young generation of Dukuh Cultural Village and people in general. The study invented 292 species of plants from 81 families of plants. The most family that invented was Fabaceae with 28 species. Those plants were categorized into 12 groups according to their usages. There are 101 species of food plant, 34 species of firewood, 47 species of buildingmaterial plant, 19 species of aromatic plant, 150 species of medicinal plant, 24 species of handicraft-material plant, 8 species of bio-pesticide, 33 species of cattle feeding, 16 species of ritual purpose-plant, 51 species of ornamental plant, 7 species of coloring-material plant and 3 species of drink-material plant. The result shows 194 species (66,44%) are cultivated plants, 74 species (25,34%) are wild plants, 24 species (8,22%) are categorized as the wild and cultivated plants. The location where the species of plants were invented consist of garden (148 species; 30,08%), yard (136 species; 27,64%), un-irrigated field (82 species; 16,67%), forest (71 species; 14,43%), edge of street (34 species; 6,91%) and rice field (21 species; 4,27%). The part of plants dominated used is leaf (110 species ; 22,45%) while fruit-skin (1 species ; 0,2%) is the lest. The total of habitus was dominated by herb (146 species; 50%). The bush is the minority (2 species; 0,68%). The main commodities are rice (Oriza sativa) as the main plant, clove (Syzygium aromaticum) and teak (Tectona grandis) as the main plant for increasing the local people’s economic. The food plant consists of vegetable, fruits and carbohydrate production-plants. The species of plants that are used for building and firewood are relatively same, only the parts of plants are different. Teak (Tectona grandis) and kihiyang (Albizia procera) are species that mostly used by the local people to build their houses. Aromatic plants has functions for additive and flavor substance of food, room camphor and clothes camphor. One of the important usages is for medical purpose. The practice of traditional medical that easy to see is medical treatment of pregnant, puerperal and post puerperal woman by an indigenous medical. The ornamental plants are taken from the forest, both inside of forest area and outside of area. The plants for ritual purpose are usually used in expressing of gratitude to God and religious event. The cattle feeding plants are used to feed goats and sheep. Bio-pesticide is for eradicating the plants’ pest. The
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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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