Judul: Utilization of Food Plants, Animals, and Spices of Tengger Ethnic at Ngadas Village, Probolinggo
Abstrak: Pemanfaatan pangan oleh masyarakat di pedesaan baik pangan nabati maupun hewani sebagai pendukung dalam masakan, diduga kuat terkait dengan kearifan tradisional masyarakat. Suku Tengger merupakan salah satu suku yang berada di Indonesia yang memanfaatkan pangan secara tradisional, namun data dan informasi mengenai pemanfaatan pangan nabati, hewani, dan rempah oleh masyarakat Suku Tengger ini belum terdokumentasikan dengan baik. Penelitian bertujuan untuk mengidentifikasi keanekaragaman hayati lokal, menganalisis kearifan lokal dan manfaat pangan, potensi pangan, dan nilai ekonomi serta prospek pengembangannya. Penelitian dilakukan dengan wawancara, studi literatur, survei lapang, dan eksplorasi. Hasil penelitian teridentifikasi sebanyak 49 spesies tumbuhan pangan, 14 spesies tumbuhan rempah, 10 spesies tumbuhan obat, 7 spesies pangan hewani yang digunakan oleh masyarakat, dan 5 spesies tumbuhan obat. Spesies tumbuhan pangan budidaya memiliki nilai ekonomi Rp40.000.000,00 setiap tahun. Prospek pengembangan pemanfaatan spesies berada pada tahap perencanaan., Utilization of foods by people in rural areas, both vegetables and animals food as a support in cooking, is strongly suspected to be related to the traditional wisdom of the community. The Tengger Ethnic is one of the Ethnic in Indonesia that uses food traditionally, but the data and information on the use of plant, animal, and spice foods by the Tenggerese people haven’t been well documented. The research aims to identify local biodiversity, analyze local wisdom and food benefits, foods potential, and economic value and development prospects. The research was conducted by interview, literature study, field survey, and exploration. The results of the study identified 49 food plants species, 14 spices plant species, 10 medicinals plant species, 7 animals food species used by the community, and 5 medicinal plants species. Cultivated foods plant species have an economic value of IDR 40,000,000.00 per year. The prospect of developing species utilization is at the planning stage
Keyword: Fidelity Level

Judul: Utilization of Plant and Animal Resources by Communities in East Lingga District, Lingga Regency, Riau Islands
Abstrak: Pemanfaatan sumberdaya tumbuhan dan hewan yang dilakukan masyarakat masih diterapkan masyarakat desa dalam bentuk kearifan lokal, dan pengetahuan tersebut diturunkan dari generasi ke generasi. Penelitian ini bertujuan mengidentifikasi keanekaragaman tumbuhan dan hewan yang sudah dan belum dimanfaatkan, serta menganalisis bentuk pemanfaatan tumbuhan dan hewan berbasis kearifan lokal oleh masyarakat Kecamatan Lingga Timur. Penelitian ini dilaksanakan pada bulan Juli 2022 di tiga desa, yaitu Desa Pekaka, Desa Keton Dan Desa Teluk. Hasil penelitian menunjukan banyaknya keanekaragaman tumbuhan dan hewan ditemukan dari berbagai tutupan lahan, diantaranya diketahui sebanyak 366 spesies tumbuhan dari 103 famili dan diketahui 142 spesies hewan dari 96 famili. Bentuk pemanfaatan yang masyarakat lakukan masih bersifat tradisional, penggunaan tumbuhan banyak digunakan sebagai sumber pangan dan bahan obat. Spesies yang memiliki peran penting bagi masyarakat yaitu sagu (Metroxylon sagu), digunakan sebagai sumber karbohidrat dan kebutuhan lainnya. Sedangkan masyarakat memanfaatkan hewan sebagai sumber protein hewani, terutama yang didapatkan dari lautan. Kearifan lokal yang masyarakat lakukan, diantanya mengawetkan sumber pangan hewani dengan cara fermentasi dan pengeringan yaitu seperti belacan dan ikan asin., resources in the form of local wisdom, and this knowledge is passed down from generation to generation. This study aims to identify the diversity of plants and animals that have been and have not been used and to analyze the forms of utilization of plants and animals based on local wisdom by the people of East Lingga District. This research was conducted in July 2022 in three villages, namely Pekaka Village, Keton Village, and Teluk Village. The results showed a great diversity of plants and animals from various land covers, including 366 plant species from 103 families and 142 animal species from 96 families. The form of utilization that the community does is still traditional, and plants are widely used as a source of food and medicinal ingredients. Species that have an important role in the community, namely sago (Metroxylon sago), are used as a source of carbohydrates and other needs. Meanwhile, people use animals as a source of animal protein, especially those obtained from the ocean. The local wisdom that the community practices, among others, is preserving animal food sources utilizing fermentation and drying, such as belacan and salted fish
Keyword: Pemanfaatan tumbuhan, Pemanfaatan hewan, Kearifan lokal, Lingga, pembangunan desa

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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