Judul: Development Strategy the Manau Rattan Utilization Sustainably on Conservation Partnership in Siberut National Park
Abstrak: Desa Sagulubbeg Taman Nasional Siberut (TNS) memiliki potensi rotan manau yang besar. TNS dengan masyarakat bekerja sama dalam kemitraan konservasi pemanfaatan rotan manau. Diperlukan kemitraan konservasi terpadu agar pemanfaatan rotan manau dapat berkelanjutan. Penelitian ini bertujuan untuk merumuskan strategi pengembangan dengan mengidentifikasi pemanfaatan, menghitung nilai ekonomi, dan menganalisis implementasi kebijakan kemitraan konservasi. Penelitian dilakukan di Desa Sagulubbeg pada bulan Maret-Mei 2022. Metode pengumpulan data dengan wawancara, observasi lapangan, dan studi literatur. Analisis data menggunakan analisis deskriptif kualitatif, analisis deskriptif kuantitatif, analisis isi, dan analisis SWOT. Hasil dari penelitian menunjukan pemungutan rotan manau dilakukan secara tradisional berdasarkan pola, teknik, dan intensitas pemungutan. Rotan manau hasil pengolahan untuk pemanfaatan komersial merupakan rotan manau setengah jadi. Total nilai ekonomi pemanfaatan rotan manau sebesar Rp1.337.400.000/tahun. Implementasi kemitraan konservasi berada pada tahap keamanan masyarakat mengakses hutan. Strategi pengembangan menggunakan Strategi SO (strengths and opportunities) dengan memperkuat kolaborasi dan memberikan nilai tambah pada rotan manau., Sagulubbeg Village of Siberut National Park has great potential for manau rattan. Siberut National Park collaborates with the community in a conservation partnership for the utilization of manau rattan. An integrated conservation partnership is needed so that the utilization of manau rattan can be sustainable. This study aims to formulate a development strategy by identifying uses, calculating economic value, and analyzing the implementation of conservation partnership policies. The research was conducted in Sagulubbeg Village in March-May 2022. Methods of data collection by interviews, field observations, and literature studies. Data analysis used descriptive qualitative analysis, quantitative descriptive analysis, content analysis, and SWOT analysis. The results of the research show that the manau rattan harvesting is carried out in a traditionally based on the pattern, technique, and harvesting intensity. Processed manau rattan for commercial use is semi-finished manau rattan. The total economic value of manau rattan utilization is IDR 1,337,400,000/year. The implementation of the conservation partnership is at the stage of community security in accessing the forest. The development strategy uses the SO (strengths and opportunities) strategy by strengthening collaboration and providing added value to manau rattan.
Keyword: conservation partnership, development strategy, manau rattan

Judul: Pendugaan Nilai Pemanfaatan Hasil Hutan Bukan Kayu di Desa Simatalu Zona Tradisional Taman Nasional Siberut
Abstrak: Masyarakat sekitar hutan sangat bergantung pada hasil hutan untuk memenuhi kebutuhan hidup mereka. Salah satu jenis hasil hutan yang dimanfaatkan masyarakat adalah hasil hutan bukan kayu (HHBK). Pemanfaatan HHBK merupakan serangkaian kegiatan yang mencakup pemanenan, pengolahan, serta pemasaran komoditas hasil hutan tersebut. Penelitian ini bertujuan untuk mengidentifikasi bentuk pemanfaatan dan menduga nilai ekonomi berbagai spesies HHBK yang dimanfaatkan oleh masyarakat di kawasan Taman Nasional Siberut. Metode yang digunakan pada penelitian ini adalah wawancara, observasi lapang, dan studi literatur. Hasil penelitian menunjukkan bahwa masyarakat Desa Simatalu memanfaatkan tujuh spesies HHBK untuk kebutuhan subsisten dan komersial. Spesies HHBK tersebut meliputi rotan manau, madu, kopra, arang, sagu, pinang, dan cengkeh. Faktor-faktor seperti jenis kelamin, kelas umur, dan tingkat pendidikan memiliki kaitan terhadap pemanfaatan HHBK. Total nilai ekonomi yang didapatkan masyarakat desa dari pemanfaatan HHBK sebesar Rp. 10.061.679.969,7 per tahun., Communities around the forest are very dependent on forest products to meet their needs. One type of forest product utilized by the community is non-timber forest product (NTFP). The use of NTFP is a series of activities that include harvesting, processing and marketing of these forest product commodities. This study aims to describe the form of utilization and calculate the economic value of various NTFP species utilized by the community in the Siberut National Park area. The methods used in this study were interviews, field observations, and literature studies. The results showed that the people of Simatalu Village utilized seven NTFP species for subsistence and commercial needs. The NTFP species include manau rattan, honey, copra, charcoal, sago, areca nut and cloves. Factors such as gender, age class, and level of education are related to the utilization of NTFPs. The total economic value obtained by the village community from the utilization of NTFP is Rp. 10,061,679,969.7 per year.
Keyword: utilization, NTFP, community, economic value

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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