Judul: Meta Synthesis of Sugar Palm (Arenga pinnata (Wurmb.) Merr.) Research Result in Indonesia
Abstrak: Aren merupakan tumbuhan serbaguna sehingga disebut Multi Purpose Trees Species (MPTS) yang memiliki prospek yang baik. Penelitian aren banyak dilakukan namun belum dihimpun sehingga belum diketahui gap penelitiannya. Tujuan penelitian ini yaitu untuk menginventarisasi dan menganalisis hasil penelitian aren di Indonesia melalui database Google Scholar dan Scopus tahun 1986-2021. Metode yang digunakan dalam penelitian ini yakni dengan systematic review dan analisis bibliometrik menggunakan software Publish or Perish, Vosviewer dan Mendeley. Hasil penelitian menunjukkan bahwa terdapat 476 artikel yang dikumpulkan dengan topik terbanyak yakni topik Ekonomi dan Bisnis serta Teknologi dan Industri. Fase penelitian aren di Indonesia tidak dilakukan secara bertahap namun jumlah artikel penelitian yang dipublikasikan cenderung meningkat seiring bertambahnya periode tahun. Penelitian aren lebih banyak terkait penelitian nira dibandingkan dengan bagian lainnya. Penelitian aren lebih banyak dilakukan secara kolaborasi. Penelitian aren penting untuk mengembangkan bioprospeksi aren sehingga juga perlu perhatian besar dari pihak-pihak terkait termasuk pemerintah., Sugar palm is a useful plant so it’s called as Multi Purpose Trees Species (MPTS) that has good prospects. Sugar palm research has been carried out but has not been compiled in database so the gaps is not yet known. The purpose of this study are to inventory and analyze the result research of sugar palm in Indonesia through the Google Scholar and Scopus databases from 1986- 2021. The method used in this study is systematic review with bibliometric analysis using Publish or Perish, Vosviewer and Mendeley software. The results showed that there are 476 articles collected with the most topics Economics and Business and Technology and Industry. The phase of the palm sugar research phase in Indonesia is not carried out in stages, but the number of published research articles tends to increase with the increasing period of the year. Research of sugar palm is more related to sap research than other parts. Sugar palm research is mostly done by collaboration. Sugar palm research is important to develop sugar palm bioprospection so it also needs great attention from stakeholders including the government.
Keyword: Bibliometric analysis, research phase, research topics, sugar palm

Judul: Palm Ethnobotany in Beruas Village Community, Simpang Katis District, Central Bangka Regency
Abstrak: Aren (Arenga pinnata Merr.) merupakan spesies palma multiguna yang tersebar hampir di seluruh kawasan Indonesia, salah satunya di Desa Beruas. Penelitian ini bertujuan untuk mengidentifikasi profil masyarakat, bentuk pemanfaatan, kearifan lokal, dan tumbuhan berguna yang berada di sekitar tegakan aren. Pengambilan data dilakukan menggunakan metode wawancara secara mendalam, observasi partisipatif, dan dokumentasi. Hasil penelitian menunjukan bahwa seluruh petani aren di Desa Beruas berjenis kelamin laki-laki dengan dominan usia 36-45 tahun (dewasa akhir, KU III). Masyarakat memanfaatkan aren sebagai bahan pangan seperti gula aren dan kolang-kaling serta sebagai kerajinan tangan seperti sapu ijuk. Masyarakat memiliki kearifan lokal dalam menentukan aren yang menghasilkan banyak air melalui morfologi aren. Petani aren juga menggunakan pengawet alami seperti akar ube-ube kuning dan daun karamuang untuk memperpanjang masa simpan air nira. Spesies tumbuhan berguna yang pada umumnya ditemukan pada kelekak yaitu durian, nangka, manggis, cempedak, karet, dan kelapa., Sugar palm (Arenga pinnata Merr.) is a multipurpose palm species that is spread almost throughout Indonesia, one of which is in Beruas Village and Teru Village. This research aims to identify community profiles, forms of use, local wisdom, and useful plants located around sugar palm stands. Data collection was carried out using in-depth interview methods, participant observation, and documentation. The research results show that all sugar palm farmers in Beruas Village and Teru Village are male with a dominant age of 36-45 years (late adulthood, KU III). People use sugar palm as a food ingredient such as palm sugar and palm fruit and as a handicraft such as palm fiber brooms. The community has local wisdom in determining palm trees that produce a lot of water through palm morphology. Sugar palm farmers also use natural preservatives such as yellow ube- ube roots and Karamuang leaves to extend the shelf life of palm juice. Useful plant species that are generally found in kelekak are durian, jackfruit, mangosteen, cempedak, rubber, and coconut.
Keyword: aren, Kearifan lokal, kelekak, pemanfaatan aren

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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