Judul: Inventory of Medicinal Plants at Sumber Sehat Multifarm, Tegalwaru Village, District of Ciampea, Bogor Regency
Abstrak: Pemanfaatan tanaman obat di Indonesia semakin menurun setiap tahunnya. Oleh sebab itu, penambahan wawasan mengenai keanekaragaman dan pemanfaatan tanaman obat diperlukan. Penelitian ini bertujuan memberikan informasi mengenai keanekaragaman dan pemanfaatan tanaman obat yang berada di Sumber Sehat Multifarm. Pengambilan data tumbuhan, seperti: nama lokal, nama ilmiah, habitus, manfaat tanaman obat, bagian tanaman yang digunakan, cara penggunaan serta proses pengolahan tanaman obat didapatkan dari metode observasi partisipatif dan wawancara semi terstruktur. Analisis data dilakukan secara kuantitatif dengan mengukur persentase bagian tumbuhan yang digunakan dan persentase habitus tumbuhan yang digunakan. Analisis data kualitatif dilakukan secara deskriptif. Hasil menunjukkan bahwa Sumber Sehat Multifarm memanfaatkan 177 spesies tanaman yang termasuk kedalam 64 famili sebagai obat. Sebagian besar habitusnya berupa herba. Bagian tanaman yang banyak dimanfaatkan adalah daun. Sebagian besar jenis tanaman mampu mengatasi lebih dari satu macam penyakit. Manfaat tanaman obat dapat digolongkan menjadi dua kategori, yaitu: tanaman obat yang mengobati penyakit luar dan tanaman obat yang mengobati penyakit dalam. Sebagian besar tanaman dapat dikonsumsi dengan direbus atau dimakan segar., The utilization of traditional medicinal plants in Indonesia is decreasing every year. Therefore, increasing the knowledge about the diversity and utilization of medicinal plants is needed. This research aimed to provide information about the use of medicinal plants in Sumber Sehat Multifarm. Data such as local name, scientific name, habitus, plant efficacy, part of the plants that are used, benefits, how to use, and also plant processing were collected through participative observation and semi-structured interview method. Data analysis was done through a quantitative method by calculating the percentage of part of the plants that are used and the habitus of the plants that are found. Qualitative analysis of data was done descriptively. The result showed that Sumber Sehat Multifarm uses 177 species belonging to 64 families as medicinal plants. Most plant species have a herbaceous habitus. Part of the plants that are used mostly are the leaves. Most plant species of plant can treat more than one kind of disease. The benefits of the plant can be grouped into two categories: plants use to cure internal organ disease and plants for treating external organ disease. Most plant species can be consumed by brewing or freshly eat it.
Keyword: herbaceous habitus, traditional medicine, health, medical plants

Judul: Utilization of Medical Plants by the people of Sukarama Village, Bojongpicung District, Cianjur Regency, West Java
Abstrak: Pemanfaatan tumbuhan obat yang dilakukan oleh masyarakat masih dijadikan sebagai tradisi turun-temurun khususnya masyarakat pedesaan. Masyarakat Desa Sukarama memiliki pengetahuan tumbuhan yang dimanfaatkan sebagai obat yang masih dilestarikan sampai sekarang, namun data dan informasi mengenai pengetahuan tersebut masih sangat kurang. Penelitian ini bertujuan untuk mengidentifikasi jenis-jenis tumbuhan obat serta bentuk pemanfaatannya di Desa Sukarama. Penelitian dilakukan pada bulan Februari – Maret 2022 di Desa Sukarama. Alat dan bahan yang digunakan berupa perlengkapan wawancara dan eksplorasi tumbuhan. Metode pengambilan data yang digunakan dalam penelitian adalah studi literatur, eksplorasi tumbuhan, wawancara masyarakat desa, observasi partisipatif, survei lapangan, dan pembuatan herbarium. Hasil penelitian menunjukkan bahwa ditemukan 106 spesies tumbuhan dari 48 famili dengan bentuk pemanfaatan sebagai bahan obat sebanyak 106 spesies tumbuhan, 17 spesies bahan jamu, 16 spesies bahan bumbu, 8 spesies lalapan, serta 8 spesies tumbuhan sebagai penjualan. Bentuk pemanfaatan terbanyak yang dimanfaatkan oleh masyarakat desa adalah bahan obat., The use of medicinal plants by the community is still used as a hereditary tradition, especially in rural communities. The people of Sukarama Village have knowledge of plants that are used as medicine which are still preserved until now, but data and information about this knowledge are still very lacking. This study aims to identify the types of medicinal plants and their forms of use in Sukarama Village. The research was conducted in February – March 2022 in Sukarama Village. The tools and materials used are interview equipment and plant exploration. The data collection methods used in the study were literature study, plant exploration, village community interviews, participatory observation, field surveys, and making herbarium. The results showed that there were 106 plant species from 48 families with 106 types of medicinal uses, 17 types of herbal ingredients, 16 types of spices, 8 types of fresh vegetables, and 8 types of plants for sale. The most common form of utilization used by the village community is medicinal ingredients.
Keyword: medical plants, sukarama village, utilization

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.
Keyword: