Judul: Penilaian Kondisi Kesehatan Tegakan di Areal Pasca Tambang PT Antam Tbk UBPE Pongkor, Jawa Barat
Abstrak: Problems on recent forest condition in Indonesia are the decreasing of forest quality land clearing for mining industry. PT. Antam Tbk UBPE Pongkor, West Java is a gold mining company located in forest area. Therefore this company should revegetation/reclamation on ex-mining area. To assess the effectiveness on the result of revegation/ reclamation by PT. Antam Tbk UBPE Pongkor, evaluation effectiveness. Evaluation on the health condition is done by using Forest Health Monitoring method in 3 location, e.g revegetation area in 2001, 2003 and 2006. Natural forest is used as control. The result showed that the health of forest at revegetation area in years 2003 and 2006 categorized in unhealthy condition compared with reclamation condition in 2001 and natural forest which on good condition. It is indicated that intensive handling and nursing from PT Antam Tbk UBPE Pongkor is needed in manager reclamation area in years 2003 and 2006 to increase their health in the future., Problems on recent forest condition in Indonesia are the decreasing of forest quality land clearing for mining industry. PT. Antam Tbk UBPE Pongkor, West Java is a gold mining company located in forest area. Therefore this company should revegetation/reclamation on ex-mining area. To assess the effectiveness on the result of revegation/ reclamation by PT. Antam Tbk UBPE Pongkor, evaluation effectiveness. Evaluation on the health condition is done by using Forest Health Monitoring method in 3 location, e.g revegetation area in 2001, 2003 and 2006. Natural forest is used as control. The result showed that the health of forest at revegetation area in years 2003 and 2006 categorized in unhealthy condition compared with reclamation condition in 2001 and natural forest which on good condition. It is indicated that intensive handling and nursing from PT Antam Tbk UBPE Pongkor is needed in manager reclamation area in years 2003 and 2006 to increase their health in the future.
Keyword: the evaluation, PT Antam Tbk UBPE Pongkor, forest condition, FHM Method, Bogor Agricultural University (IPB)

Judul: Status Kesehatan Hutan di Areal Reklamasi Tambang Batubara PT Berau Coal Kalimantan Timur.
Abstrak: Mining activity always related to land conversion that lead to the destruction of forest resources, among others biodiversity loss, land fertility degradation dan toxicity of land. Every mining license holder is required to held a reclamation activity in order to returning forest area and degraded land into its proper function. Forest Health Monitoring (FHM) is a method which can be used to monitor, assess and report the current forest status, changes and long term trends in forest ecosystem health by using measurable ecological indicators for making management decision. The aim of this study was to assess forest health status in reclamation areal in Sambarata Site PT Berau Coal using FHM method. Assessment was done using indicators such as productivity, site quality, vitality (tree damage condition and crown condition) and undergrowth biodiversity. Total amount of established plot was 20 plots (5 cluster plots), it was located in planting year of 2011, 2010, 2009, 2008 and 2007. The result showed that the forest health status was classified into fair with the values of 20, 23, 26, 26 and 26 of 50 respectively.
Keyword: FHM, forest health, mining

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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