Judul: Tipologi Habitat dan Potensi Pemanfaatan Kantong Semar (Nepenthes aristolochioides) Di Taman Nasional Kerinci Seblat
Abstrak: Nepenthes aristolochioides is an endemic species found in Indonesia. This species is located in a narrow distribution on Mount Tujuh and is in the forest area of Kerinci Seblat National Park (TNKS), Kerinci Regency, Jambi Province. Nepenthes aristolochioides is one of the types of pitcher plants that are endemic in Indonesia and is the Nepenthes species are scarce and highly endangered. However, studies related to environmental factors that influence its existence have not been assessed. Therefore, a prediction model for the distribution of N.aristolochioides is needed as a habitat management solution. This study aims to make a prediction map of the habitat of N.aristolochioides in Kerinci Seblat National Park. Characteristics of the environmental factors of the N.aristolochiodes habitat that play an essential role in habitat suitability are the variables BIO19 (Precipitation of Coldest Quarter), BIO1 (Annual Mean Temperature), BIO13 (Precipitation of Wettest Month), DEM (Digital Evaluation Model). Prediction of the distribution of N.aristolochiodes habitat with moderate habitat suitability of 10,523 ha, while with a high suitability level, is 4,176 ha. Habitats with a high level of conformity are spread over two main administrative areas, namely, Gunung Tujuh Sector, Gunung Kerinci Sector.
Keyword: Habitat distribution, MaxEnt, Nepenthes aristolochioides

Judul: Kondisi Habitat dan Pola Sebaran Kantong Semar (Nepenthes sp.) di Gunung Bismo, Jalur Pendakian Deroduwur, Jawa Tengah
Abstrak: Nepenthes spp. (kantong semar) merupakan tumbuhan karnivora unik yang tersebar di palaeotropik dengan pusat keanekaragaman di zona biogeografi Malesia. Salah satu habitat Nepenthes yaitu Pegunungan Dieng termasuk Gunung Bismo. Tujuan dari penelitian ini adalah mengidentifikasi spesies, kondisi habitat, komposisi mangsa, dan pola sebaran Nepenthes yang berada di Jalur Pendakian via Deroduwur, Gunung Bismo. Metode yang digunakan adalah identifikasi spesies, identifikasi mangsa, dan analisis habitat. Spesies Nepenthes yang ditemukan di lokasi ini yaitu Nepenthes gymnamphora. Habitat N. gymnamphora berupa vegetasi hutan pegunungan sekunder beriklim basah pada ketinggian 1612-1629 m dpl dengan jenis tanah berupa andosol bertekstur lempung berliat dengan sifat asam dan kandungan bahan organik dan nitrogen tinggi. Mangsa utama N. gymnamphora yaitu invertebrata dari ordo Hymenoptera, Blattodea, dan Diptera. Populasi N. gymnamphora membentuk pola sebaran berkelompok.
Keyword: gunung bismo, nepenthes, habitat, pola sebaran, tumbuhan karnivora, carnivorous plant, distribution pattern

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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