Judul: Konservasi Rafflesia patma Blume Dalam Pengembagan Geopark Nasional Ciletuh-Pelabuhanratu Sukabumi
Abstrak: Rafflesia merupakan bunga terbesar dan dilindungi di Indonesia. Masalah utama yang mengancam keberadaan spesies ini antara lain rusaknya hutan hujan sebagai habitat, fragmentasi dan konversi lahan serta kurangnya pemahaman stakeholders dalam upaya konservasi. Tujuan penelitian ini yaitu mendapatkan data populasi dan habitat Rafflesia patma Blume di kawasan Geopark Nasional Ciletuh-Pelabuhanratu (GNCP), menganalisis stakeholders konservasi R. patma dan pengembangan GNCP, menganalisis unsur-unsur budaya masyarakat kawasan GNCP, serta merumuskan strategi konservasi R. patma dalam pengembangan GNCP. Penelitian dilakukan di kawasan GNCP mencakup 17 desa dari dua Kecamatan, Kabupaten Sukabumi, dilakukan selama 12 bulan, yaitu dari bulan November 2016 sampai November 2017. Pengumpulan data populasi dan habitat R. patma dilakukan dengan metode purposive sampling menggunakan petak contoh berukuran 1000 meter sedangkan pengumpulan data stakeholders dilakukan dengan metode survey melalui wawancara tertutup. Data populasi R. patma yang dianalisis mencakup ukuran, bentuk, jumlah dan fase perbungaan R. patma sedangkan data habitat yang dianalisis mencakup kondisi vegetasi tumbuhan dan kondisi fisik kawasan. Atribut stakeholders yang dianalisis mencakup persepsi, daftar stakeholders, kategori stakeholders, dan hubungan antar stakeholders. Populasi R. patma di leuweung Cipeucang kawasan GNCP ditemukan sebanyak 4 sub populasi, terdiri atas 21 individu pada ketinggian 196-217 mdpl dengan tumbuhan inang Tetrastigma papilosum. Populasi R. patma terdiri atas 9% bunga mekar, 13% mati setelah mekar, 26% knop hidup dan 52% mati setelah mekar. Indeks Nilai Penting (INP) tertinggi pada vegetasi tingkat semai dan pancang yaitu pada spesies Streblus ilicifolius dari famili Moraceae dengan INP yaitu 58.5% pada tingkat semai dan 28% pada tingkat pancang sedangkan vegetasi tingkat pohon pada spesies Ficus tinctoria dari famili Moraceae dengan INP yaitu 37.45%. Indeks Keanekaragaman (H’) tertinggi adalah pada vegetasi tumbuhan tingkat semai yaitu 9.54. Teridentifikasi sebanyak 16 stakeholders konservasi R. patma dalam pengembangan GNCP, 11 stakeholders termasuk kategori Key Player, 4 Subject dan 1 Contex setter. Hubungan atar stakeholders kunci termasuk dalam bentuk koalisi, kolaborasi, dan koadunasi. Persepsi stakeholders terhadap R. patma rendah demikian juga persepsi masyarakat terhadap pengembangan GNCP serta R. patma rendah. Strategi konservasi R. patma yang direkomendasikan adalah sosialisasi dan edukasi sifat serta keberadaan R. patma sebagai icon GNCP serta pemberdayaan untuk meningkatkan partisipasi stakeholders dan masyarakat dalam konservasi R. patma dan pengembagan GNCP.
Keyword: ciletuh, geopark, populasi, rafflesia

Judul: Kajian populasi dan habitat Rafflesia patma Blume di cagar alam Pananjung Pangandaran Jawa Barat
Abstrak: RafJlesia patma Blume is placed as one of the CRB2c endagered status. it refers to the taxon who face the highest extinction in the short period of time. The flower scarce is caused by a live factor of R. patma that need specific habitants such as physical and biotic factors. The habitats and population of R. patma will be change on fluctuation due to the higher men activities and nature's changes. On the other hand, as an endagered species, we need to focus on population watching and do the research in CA Pananjung Pangandaran (CAPP) in order to avoid from the extinction. The research was held in CAPP on July - September 2008. Using purposive sampling method to get the data with a round plotting. Inside the plot was held a population measurement of R. patma and also valuing the physical and biotical components with quantitive descriptive and also qualitative descriptive. Lastly, valuing INP (the important of value index) and diversity for the vegetation level. From the assesment research founded the anlount of individual population is 3 12 spreading in 6 locations. The vegetation in R. patma habitants is classified into the lowlm~d rain forest vegetation with the normal standing structure. The composition of vegetation level for the trees is 47 species the the highest INP came from Vitexpubescens Vahl(26.24%), 35 species on the stake level with INP (22.67%) from Euphorbia chasembila species and on seedling level is 32 species with the highest WP from Pterospermum javanicum (82.51%) species. There are 2 species of host of R.patma, Kibalera (Tetrastigma leucostaphylum) and Tali koja (Tetrastigma sp.). There are 2 flies species that help for Lucilia sp dan Sarcophaga sp. Porcupine, chipmunk, black ant, deer, and squirrel are predicted as a component for spreading seed of R. patma. the physical condition have a topography between 0-100 mdpl and flat slope, slope slightly until a little steep (4-35%). Soil condition is loam texture, the acidity level is quite acid until acid and the primary element have medium concentration until low concentration, on the other hand for the secondarv structure have low until high co~lcentrations. Including climate b type with avkrage temperature between 23;7 OC - 25 OC, and humidity between 8 1,7%-90%. The management activities for R. patnza are focus on security advance and protecting flowerkith its population and the habitants. From the result describes in 2008, the increasing of individual population in CAPP is happen. Located ill the type of lowland vegetation forest in 0-100 mdpl which have B-climate type, medium temperature, high humidity and also can grow on the flat until quite steep slope. There are 2 plants species host of R. patnza and animal species for spreading, net decomposition of R. patma. Beside management level, manager is more focus on land security and R. patma itself.
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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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