Judul: Economic Feasibility Analysis of Rhizome Group Biopharmaceutical Plants Farming in Taman Sringganis
Abstrak: Sektor pertanian merupakan salah satu aset terpenting dalam menunjang perekonomian negara. Subsektor hortikultura menjadi salah satu sub sektor pertanian yang telah berkontribusi nyata dalam mendukung perekonomian nasional. Tanaman biofarmaka merupakan tanaman yang mempunyai beragam efek untuk menyembuhkan berbagai penyakit. Tanaman biofarmaka telah lama digunakan dalam pengobatan seperti influenza, demam, pilek, dan herpes. Kelima tanaman biofarmaka kelompok rimpang tersebut dapat dijadikan obat herbal untuk mencegah beberapa gejala Covid-19. Taman Sringganis berada di Kelurahan Cipaku Kota Bogor ditumbuhi oleh lebih dari 450 jenis tanaman obat. Permasalahan yang saat ini sedang menimpa Taman Sringganis adalah kurang optimalnya penggunaan lahan perkebunan tanaman obat karena dengan lahan yang terbatas ada berbagai macam jenis tanaman obat yang dibudidayakan. Penelitian ini menggunakan analisis deskriptif dan analisis biaya manfaat (abm) untuk menganalisis aspek-aspek kelayakan ekonomi usahatani tanaman obat kelompok rimpang. Analisis sensitivitas digunakan untuk menganalisis sensitivitas kelayakan ekonomi usahatani akibat beberapa skenario perubahan yang terjadi., The agricultural sector is one of the most important assets in supporting the country's economy. The horticulture sub-sector is one of the agricultural sub-sectors that has contributed significantly in supporting the national economy. Biopharmaceutical plants are plants that have various effects to cure various diseases. Biopharmaceutical plants have long been used in treatments such as influenza, fever, colds, and herpes. The five biopharmaceutical plants of the rhizome group can be used as herbal medicines to prevent some of the symptoms of Covid-19. Taman Sringganis is located in Cipaku Village, Bogor City, where more than 450 types of medicinal plants grow. The problem that is currently affecting Taman Sringganis is the less than optimal use of medicinal plant plantation land because with limited land there are various types of medicinal plants being cultivated. This study uses descriptive analysis and cost benefit analysis (cba) to analyze aspects of the economic feasibility of farming medicinal plants in the rhizome group. Sensitivity analysis is used to analyze the sensitivity of the economic feasibility of farming due to several scenarios of changes that occur.
Keyword: biopharmaceutical, cba, farming, horticulture, sensitivity

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: 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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