Judul: Ethnobiology of thesamin
Abstrak: This ethnobiological research focus on the ethnoecological, ethnobotanical and ethnozoological study of the adaptation process (correlating to management concept, impact on people’s activities, and technology usage) of Samin Community. The goals of this research were to study the beliefs, knowledge, and practice the Samin community for the comprehensive understanding of landscape use and management, ant to reveal the local knowledge of Samin community in managing their natural resource (plants and animals) whice include species diversity, the index of ecological importance value (INP), and the index of cultural significance (ICS). The study was conducted during the period of August 2009 to December 2011. The research was carried out in 7 villages in 4 districts, namely: (1) Larikrejo and (2) Kaliyoso (Kudus District); (3) Bombong and (4) Ngawen (Pati District); (5) Klopoduwur and (6) Tambak, Sumber (Blora District); (7) Jepang, Margomulyo (Bojonegoro, East Java). The research data consisted of ecological, ethnobotanical, ethnozoological and ethological data. Data collection using direct observation; open ended and structured interview, and participant observation. The results showed that the Samin society has a fairly good knowledge of biological resources and their environment. Use practices and management of natural resources is reflected in the form units of the environmentals and biological resources contained therein. Knowledge of the spatial environment simply divided into two main units, namely: mondokan (house and yard), and lemah garapan includes: fields (sawah), moor (tegalan) and teak (alas jati). Paddy field, dry field, yard, garden, teak forests, marsh ponds, and rivers were the places where the cultivation of a wide variety of production activities of plants and animals which were conducted to meet their basic needs. The research obtained more than 300 of plant species in the Samin settlement, which 235 species among those were useful for their life. Utilization of those plants include for food (118 species), traditional medicine and cosmetics (74 species), building materials (17 species) equipment (15 species), firewood (16 species), animal feed (27 species), fiber materials and the straps (3 species), ritual materials (26 species), toxic materials (2 species), pest control materials (16 species), environmental indicators (5 species), and ornamental plants and fences (45 species). Based on the role and utilization of animals, it can be grouped into: animal protein source (21 species), pets (7 species), pests of cultivated plants (17 species), pests of livestock (3 species), pest predators (11 species), animals for medicine (10 species), animals for ritual (1 species), and wildlife (35 species). The Samin community the resources and the environment only as necessery. They always maintained a harmonious relationship with nature.
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Judul: Etnobiologi masyarakat tengger di Bromo Tengger Semeru Jawa Timur
Abstrak: This ethnobiological research focused on the ethnoecological, ethnobotanical, and ethnozoological study of the adaptation process (correlating to management concepts, impact on people’s activities, and technology usage) of the Tengger society in Bromo Tengger Semeru, East Java to environmental conditions where they were actively using and managing natural resources. The goals of this research were to study the beliefs, knowledge, and practice of Tengger society for the comprehensive understanding of landscape use and management, and to reveal the indigenous knowledge of Tengger society in managing their natural resources (plants and animals) which included species diversity, the index of ecological important value (INP), and the index of cultural significance (ICS). The research data consisted of ecological, ethnological, ethnobotanical and ethnozoological data. Ecological data was collected using vagetation analysis, while the rest of the data was collected using the participatory ethnobotanical appraisal, structured and open ended interviews, and direct observation. The Tengger society arranged their areas based on their function and usefulness including area of housing, agriculture, conservation, ecotourism, and sacral. Traditional ecological knowledge applied for environmental conservation consisted of an agricultural system that implement terasiring combined with plant borders, stall locations separated from houses, and planting Casuarina tree arranged by traditions. Tengger people depend on plant resources for their livelihood, and they have good knowledge on plant diversity surrounding them. The various plant utilization by Tengger society include food (75 species); medicines (121 species); construction, firewood and local technology (53 species); cosmetics, handycraft, cigarette, colors (40 species); forage (44 species); ornamental plants (140 species); fruit (49 species); and ritual (94 species). Calculations of the index of cultural significance showed that rice has a very high value and ten other plant species have high value in Tengger culture. For Tengger people, various animals have an economic value, and can be used for food, ritual, transportation, and objects for tourism.The indigenous knowledge on wild animals and their uses were very good. Tengger people distinguished 120 species consisting of 64 species of Aves, 32 species of Mammals, 9 species of Reptilia, 3 species of Diptera, 2 species of Decapoda, 1 species of Arachnidae, 1 species of Orthoptera, 1 species of Hypnoptera and 6 species of Pisces.
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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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