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: 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: 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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