Judul: Palatabilitas dan produktivitas pakan banteng (Bos javanicus D'Alton) akibat pemotongan serta daya dukung Padang Pemggembalaan Tegal Sabuk, Suaka Margasatwa Cikepuh, Sukabumi
Abstrak: Menurut Undang-undang dan Peraturan satwa liar tahun 1931, banteng merupakan salah satu satwa yang dilindungi. Suaka Margasatwa Cikepuh merupakan salah satu suaka bagi satwa banteng dan jenis-jenis satwa lainnya. Berdasarkan informasi dan pengamatan langsung menunjukan bahwa jumlah populasi banteng yang ada di Suaka Margasatwa Cikepuh sudah mulai menurun. Adapun jumlah banteng yang masih ada berkisar antara 15 ekor 25 ekor saja. Penurunan jumlah populasi banteng ini disebabkan oleh terjadinya kerusakan habitat akibat gangguan manusia dan bencana alam. PB U Salah satu upaya untuk meningkatkan populasi dan kelestarian banteng adalah dengan pengelolaan padang rumput yang baik. Mcllroy (1977) menyatakan bahwa aspek-aspek yang perlu diketahui dalam pengelolaan padang rumput adalah produktivitas dan palatabilitas. Atas dasar inilah dilakukan penelitian mengenai potensi hijauan pakan alam produktivítas dan palatabilitas di Padang Penggembalan Tegal Sabuk Suaka Margasatwa Cikepuh. Penelitian ini bertujuan untuk mengetahui produktivitas dan palatabilitas hijauan pakan banteng serta daya dukung Padang Padang Penggembalaan Tegal Sabuk Suaka Margasatwa Cikepuh. Hasil penelitian ini nantinya diharapkan dapat dipakai untuk bahan pertimbangan dalam pengelolaan habitat dan populasi banteng (Bos javanicus d'Alton) di Suaka Margasatwa Cikepuh...
Keyword: 

Judul: Faktor-Faktor Penyebab Kepunahan Banteng (Bos javanicus) di Cagar Alam Leuweung Sancang Jawa Barat
Abstrak: Banteng (Bos javanicus) is one of wildlife species that is categorized into the conservation status of "Endangered" which its habitat and population continue to decline to extinction even in natural reserve such as Leuweung Sancang Natural Reserve. Habitat and population of banteng currently just located in national park which is wide area and intensive management with other protected areas including Leuweung Sancang Natural Reserve. The objective of this research is to anlyze the extinction factors of banteng in Leuweng Sancang Natural Reserve by identifying and analyzing the population, distribution, habitat, socio-economic activities of communitie and area management system. To identify ecology, socio economic and management condition with literature study and interview. The research analysis is reliability and validity instrument, spatial, qualitative, quantitative and correlation factors. Wide and shape area, boundary area, area status, PMP activities, stakeholders, community perception and community interaction are all factors than can affect to banteng extinction in Leuweung Sancang Natural Reserve. Correlation factors are (a) wide and shape area (WSA) with community interaction (0.540350); (b) PMP activities with community interaction; (c) boundary area with area status (0.531250). The extinction factors of banteng are illegal hunting that impact of 3 factors, are: (1) habitat degradation especially less maintenance of grazing area and the elongated shape of Leuweung Sancang Natural Reserve did not support banteng population, (2) less of management intensity, (3) local people negative perception for banteng existence.
Keyword: 

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.
Keyword: