Judul: Keanekaragaman Tumbuhan Berguna di Taman Hutan Raya KGPAA Mangkunagoro I Jawa Tengah
Abstrak: The Grand Forest Park of KGPAA Mangkunagoro I (TAHURA KGPAA Mangkunagoro I) is an area located in Central Java. This area conserves plant diversity which is potential to be utilized. Research on diversity of useful plants was done because the information about it was not yet available. This research aims to identify the diversity of useful plants at KGPAA Mangkunagoro I Grand Forest Park. The research was conducted by method of vegetation analysis and study of literature. The result of this study shows that 51 species (80,95%) from 63 species was identified as useful plants. Medicinal plant is the group of plants that has the highest number, which is 30 species from 24 families. The most widely used parts of plant were wood (23 species) and leaves (22 species).
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Judul: The utilization of plant diversity by community around KGPAA Mangkunagoro I Grand Forest Park (case studies in Sukuh and Gondangrejo Hamlet, Berjo Village, Ngargoyoso, Karanganyar)
Abstrak: Masyarakat sekitar kawasan TAHURA KGPAA Mangkunagoro I melakukan interaksi dengan kawasan melalui kegiatan pemanfaatan sumberdaya, terutama tumbuhan. Oleh karena itu, diperlukan informasi mengenai pemanfaatan tumbuhan oleh masyarakat. Tujuan dari penelitian ini adalah mengidentifikasi pemanfaatan keanekaragaman tumbuhan oleh masyarakat sekitar TAHURA KGPAA Mangkunagoro I, mengidentifikasi bentuk interaksi masyarakat terhadap TAHURA KGPAA Mangkunagoro I, mengidentifikasi kearifan lokal masyarakat yang berhubungan dengan konservasi tumbuhan di kawasan TAHURA KGPAA Mangkunagoro I. Penelitian dilaksanakan di Dukuh Sukuh dan Dukuh Gondangrejo, Desa Berjo, Ngargoyoso, Karanganyar. Jenis data yang diambil meliputi spesies tumbuhan yang dimanfaatkan oleh masyarakat dan bentuk pemanfaatannya serta bentuk kearifan lokal masyarakat yang berhubungan dengan konservasi. Metode yang digunakan adalah dengan wawancara dan eksplorasi. Wawancara dilakukan dengan sensus yang mewakili setiap kepala keluarga. Kemudian dilakukan eksplorasi terhadap spesies tumbuhan yang dimanfaatkan.
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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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