Judul: Utilization of Plant-Animal Based Food and Medicine by Local Communities in Besowo Forest Area, Kediri
Abstrak: Desa Besowo memiliki potensi sumberdaya alam yang dapat dimanfaaatkan sebagai pangan dan obat. Pemanfaatan sumberdaya alam merupakan bentuk interaksi yang harmonis antara manusia dengan alam sebagai modal sosial dalam mewujudkan ketahanan pangan. Penelitian ini dilakukan untuk mengidentifikasi dan menganalisis pangan nabati, hewani, serta obat tradisional yang dimanfaatkan oleh masyarakat lokal Desa Besowo di Kawasan Hutan Besowo. Metode yang digunakan meliputi wawancara, observasi lapang, studi literatur, dan identifikasi spesies yang melibatkan 25 respsonden yang dipilih secara purposive. Hasil penelitian menunjukkan terdapat 59 spesies pangan nabati yang dimanfaatkan berasal dari 25 famili. Pangan hewani yang dimanfaatkan berjumlah 10 spesies yang berasal dari 10 famili. Spesies yang dimanfaatkan masyarakat lokal Desa Besowo sebagai obat berjumlah 99 spesies tumbuhan yang berasal dari 45 famili dan tiga spesies hewan yang berasal dari 3 famili. Spesies yang memiliki peran paling penting bagi masyarakat Desa Besowo yaitu jahe (Zingiber officinale). Jahe juga sangat dipercaya dalam menyembuhkan penyakit. Masyarakat Desa Besowo memanfaatkan kearifan lokal dalam acara ritual akan disajikan makanan yaitu iwel-iwel, jenang merah, ayam bumbu, sambal goreng, eseng mie., Besowo village has potential natural resource that can be utilized as food and medicine. Utilization of natural resources is a form of harmonious interaction between humans and nature as social capital in realizing food security. This research was conducted to identify and analyze utilization of food plant, animal based food, and traditional medicine practice by the local communities of Besowo village in Besowo Forest Area. The methods were used include interviews, field observations, literature studies, and species identification which involving 25 respondents who were selected purposively. The results showed that there were 59 species of food plant that were used from 25 families. There were 10 species of animal based food used from 10 families. The species which used by the local communities of Besowo village as medicine were 99 species of plants from 45 families and three species of animal from three families. The species that has most important role for the Besowo community is ginger (Zingiber officinale). Ginger is also the highly trusted medicinal species in curing disease. The Besowo community practice their local wisdom through ritual event will served traditional food such as iwel-iwel, jenang merah, ayam bumbu, sambal goreng, tumis mie.
Keyword: local wisdom, cultural significance index, fidelity level, ginger

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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