Judul: Ethnobotany of Medicinal Plants in the Miduana Traditional Community Balegede Village Naringgul District, Cianjur.
Abstrak: Pengetahuan atau kearifan tradisional masyarakat Kampung Adat Miduana dalam pemanfaatan sumberdaya tumbuhan sebagai obat merupakan hal yang perlu dikaji agar tetap lestari. Tujuan dari penelitian ini adalah mengidentifikasi spesies, manfaat, dan cara pengolah serta kearifan lokal mengenai pemanfaatan tumbuhan obat masyarakat Kampung Adat Miduana. Metode pengumpulan data yang dilakukan adalah studi literatur, survei lapangan, dan wawancara. Analisis data yang digunakan adalah karakteristik responden, karakteristik tumbuhan obat, pengelompokkan penyakit, dan potensi pengelolaan lestari dan status konservasi tumbuhan obat. Berdasarkan penelitian terdapat 106 spesies tumbuhan yang termasuk ke dalam 47 famili. Manfaat tumbuhan obat terbanyak adalah untuk penyakit saluran pencernaan. Pengolahan tumbuhan tersebut paling banyak menggunakan metode direbus. Kearifan lokal yang terdapat pada masyarakat Kampung Adat Miduana berupa ramuan-ramuan dan pengobatan tradisional menggunakan leuhang serta sistem pewarisan pengetahuan secara turun-temurun dan menggunakan sistem karuhun., The traditional knowledge or wisdom of the Miduana Traditional Village community in utilizing plant resources as medicine is something that needs to be studied in order to remain sustainable. The purpose of this study is to identify species, benefits, and processing methods as well as local wisdom regarding the utilization of medicinal plants in the Miduana Traditional Village community. The data collection methods used were literature studies, field surveys, and interviews. The data analysis used is the characteristics of respondents, characteristics of medicinal plants, disease grouping, and the potential for sustainable management and conservation status of medicinal plants. Based on the research, there are 106 plant species included in 47 families. The benefits of most medicinal plants are for digestive tract diseases. The processing of these plants mostly uses the boiled method. Local wisdom found in the Miduana Traditional Village community in the form of herbs and traditional medicine using leuhang and the system of inheriting knowledge from generation to generation and using the karuhun system.
Keyword: kampung adat, kearifan lokal, tumbuhan obat

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: 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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