Judul: Utilization of Medicine Plants in Bayureja Village, Sindang District, Majalengka Regency
Abstrak: Pengetahuan dan kearifan lokal menyebabkan masyarakat memanfaatkan tumbuhan obat. Penelitian ini bertujuan mengidentifikasi spesies tumbuhan obat yang dimanfaatkan, serta mengidentifikasi kearifan lokal masyarakat Desa Bayureja dalam memanfaatkan tumbuhan obat. Penelitian dilaksanakan pada bulan Februari 2022 di Desa Bayureja, Kecamatan Sindang, Kabupaten Majalengka. Pengambilan data dilakukan dengan metode wawancara, eksplorasi partisipatif, observasi lapang, dan studi pustaka. Masyarakat Desa Bayureja memanfaatkan sebanyak 78 spesies dari 37 famili tumbuhan obat. Famili Fabaceae banyak dimanfaatkan. Habitus tumbuhan obat didominasi oleh pohon dan bagian yang paling banyak digunakan yaitu daun. Cara penggunaan banyak dilakukan pada tubuh bagian dalam dengan cara diminum dan proses pengolahan direbus. Intensitas penggunaan yang banyak digunakan yaitu 2 x sehari. Sebagian besar tumbuhan obat berasal dari budidaya pekarangan. Penyakit yang sering dialami masyarakat yaitu penyakit saluran pencernaan. PT. Damar Kencana Wangi mengolah sereh wangi menjadi berbagai produk kesehatan., Local knowledge and wisdom causes people to use medicinal plants. This study aims to identify the medicinal plant species used, as well as identify the local wisdom of the Bayureja Village community in utilizing medicinal plants. The research was conducted in February 2022 in Bayureja Village, Sindang District, Majalengka Regency. Data were collected by interview, participatory exploration, field observation, and literature study. The people of Bayureja Village use 78 species from 37 families of medicinal plants. Fabaceae family is widely used. The habitus of medicinal plants is dominated by trees and the most widely used part is the leaves. How to use is mostly done on the inside of the body by drinking and boiling processing. The intensity of use that is widely used is 2 times a day. Most of the medicinal plants come from garden cultivation. Diseases that are often experienced by people are digestive tract diseases. PT. Damar Kencana Wangi processes citronella into various health products.
Keyword: bayureja village, local wisdom, medicinal 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.
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