Judul: Ethnobotany of medicinal plants in the Karon tribe in Senopi Village Tambrauw Regency West Papua
Abstrak: Suku Karon merupakan salah satu etnik yang tinggal di Kampung Senopi Kabupaten Tambrauw, Papua Barat. Suku Karon dalam kehidupan sehari-hari dengan memanfaatkan berbagai sumberdaya alam yang berada di lingkungan sekitarnya, salah satunya dengan memanfaatkan tumbuhan untuk mengobati berbagai macam penyakit. Penelitian ini bertujuan untuk mengidentifikasi pengetahuan etnobotani tumbuhan obat masyarakat Suku Karon dan status konservasi spesies tumbuhan obat yang dimanfaatkan oleh Suku Karon. Penelitian ini dilaksanakan pada bulan Juli-Agustus 2020. Data pengatahuan etnobotani masyarakat Suku Karon diperoleh melalui wawancara dengan metode snowball sampling. Terindentifikasi 30 spesies tumbuhan obat yang yang dimanfaatkan Suku Karon di Kmapung Senopi. Tumbuhan obat yang dimanfaatkan masyarakat dikelompokan menjadi 24 manfaat obat. Status konservasi tumbuhan obat yang dimanfaatkan Suku Karon, teridentifikasi hanya 1 spesies tumbuhan obat dengan status terancam (Endangered) berdasarkan IUCN, yaitu Pterocarpus indicus. Kata Kunci : etnik, etnobotani, suku karon, tumbuhan obat, The Karon tribe is one of the ethnic groups who live in Senopi Village, Tambrauw Regency, West Papua. The Karon tribe in their daily life by utilizing various natural resources in the surrounding environment, one of which is by using plants to treat various diseases. This study aims to identify the knowledge of ethnobotany of medicinal plants of the Karon Tribe and the conservation status of medicinal plant species used by the Karon Tribe. This research was conducted in July-August 2020. Data on the ethnobotany knowledge of the Karon Tribe were obtained through interviews with the snowball sampling method. Identified 30 species of medicinal plants used by the Karon Tribe in Senopi Village. Medicinal plants used by the community are grouped into 24 medicinal uses. The conservation status of medicinal plants used by the Karon Tribe, identified only 1 species of medicinal plants with Endangered status based on the IUCN, namely Pterocarpus indicus Keywords: ethnic, ethnobotany, karon tribe, medicinal plants
Keyword: Ethnic, Ethnobotany, Karon tribe, Medicinal plants

Judul: Ethnophytomedic Comparison of the Tapos Village Community and Test the Efficacy of Medicinal Plants from Literature Studies
Abstrak: Keanekaragaman jenis tumbuhan obat di Kampung Tapos berpotensi untuk dikembangkan. Namun kajian tumbuhan obat masih belum banyak dilakukan. Penelitian ini bertujuan membandingkan etnofitomedika Kampung Tapos dan studi pustaka uji khasiat tumbuhan obat. Penelitian ini diharapkan dapat memberikan referensi untuk penelitian selanjutnya dan sebagai acuan dalam upaya peningkatan pemahaman masyarakat tentang tumbuhan obat. Penelitian dilaksanakan bulan April sampai Oktober 2020 di Kampung Tapos dan secara daring. Metode pengumpulan data melalui beberapa tahapan, yaitu studi pustaka, observasi, wawancara tidak terstruktur, dan dokumentasi. Hasil penelitian ini, sebanyak 99 jenis tumbuhan obat didominasi habitus herba sebanyak 39%. Bagian yang paling banyak dimanfaatkan yaitu daun sebanyak 60% dan sebanyak 59% merupakan tumbuhan obat budidaya. Sebagian besar jenis tumbuhan digunakan untuk menyembuhkan kelompok penyakit saluran pencernaan sebanyak 23 jenis tumbuhan. Masyarakat Kampung Tapos masih mempertahankan kearifan lokal dalam memanfaatkan tumbuhan obat. Sebagian pengetahuan masyarakat telah sejalan dengan hasil penelitian ilmiah. Kata kunci : etnofitomedika, Kampung Tapos, tumbuhan obat, The diversity of medicinal plants in Tapos Village has the potential to be developed. However, there are not many studies were done on medicinal plants. This study aims to compare the ethnophytomedics of Tapos Village and literature studies on the efficacy of medicinal plants. This research is expected to provide a reference for further research and as a reference in efforts to increase public understanding of medicinal plants. The research was conducted from April to October 2020 in Tapos Village and online. The method of collecting data through several stages, namely literature study, observation, unstructured interviews, and documentation. The results of this study, as many as 99 types of medicinal plants dominated by herbal habitus as much as 39%. The most widely used part was leaves as much as 60% and as much as 59% were cultivated medicinal plants. Most types of plants are used to cure a group of 23 types of digestive tract diseases. The people of Kampung Tapos still maintain local wisdom in utilizing medicinal plants. Some of the people's knowledge has been in line with the results of scientific research. Keywords : ethnophytomedicine, Tapos Village, medicinal plants
Keyword: Ethnophytomedicine, Tapos Village, Medicinal plants

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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