Judul: Management and Utilization of Medicinal Plants at Sumber Sehat Multifarm, Tegalwaru Village, Ciampea District, Bogor
Abstrak: Indonesia merupakan negara yang kaya dengan berbagai macam spesies tumbuhan obat. Banyak orang yang menggunakan produk tumbuhan obat untuk mengobati berbagai kondisi kesehatan tubuh. Sumber Sehat Multifarm (SSM) bergerak dalam bidang pengelolaan dan pemanfaatan tumbuhan obat yang telah berdiri sejak 2007. Tujuan penelitian ini adalah menjelaskan organisasi pengelolaan, mengidentifikasi spesies tumbuhan obat, bentuk produk tumbuhan obat, bentuk pendapatan dan pengeluaran, dan motivasi pengunjung. Metode pengumpulan data yang digunakan adalah studi literatur, survei lapangan, dan wawancara. Analisis data dilakukan secara kuantitatif dan deskriptif. Hasil menunjukan bahwa organisasi SSM terdiri dari pemilik, penanggung jawab, wakil penanggung jawab, administrasi, pengelola kebun, produksi, dan pemasaran. Koleksi tumbuhan obat di SSM terdiri atas 164 spesies dan 62 famili. Produk yang ditawarkan oleh SSM diantaranya adalah berbentuk serbuk instan, serbuk ramuan teh, rebusan, simplisia dan sirup. Pendapatan SSM berasal dari kegiatan kunjungan dan penjualan produk tumbuhan obat. Pengeluaran SSM bersumber dari biaya produksi dan upah tenaga kerja. Motivasi pengunjung untuk datang ke SSM sebagian besar adalah untuk urusan pekerjaan., Indonesia is a country rich in various species medicinal plants. Many people use medicinal plant products to treat various health conditions. Sumber Sehat Multifarm (SSM) is engaged in the management and utilization of medicinal plants which has been established since 2007. The purpose of this research was to explain the management organization, identify collections of medicinal plants, forms of medicinal plant products, forms of income and expenses, and explains visitor motivations. Data collection methods used are literature studies, field surveys, and interviews. Data analysis was carried out quantitatively and descriptively. The results showed that the SSM organization consisted of owners, persons in charge, representatives in charge, administration, plantation management, production, and marketing. Collection of medicinal plants in SSM identified as many as 164 species and 62 families. The products offered by SSM include instant powder, herbal tea powder, concoctions, simplicia and syrup. SSM's income comes from visiting and selling medicinal plant products. while SSM expenses come from production costs and labor wages. The motivation of visitors to come to SSM is mostly for work matters.
Keyword: organization, medicinal plants, production, visitor

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: