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: Standing and Habitat Condition of Sugar Palm (Arenga pinnata. (Wurmb.) Merr.) ‎in Hariang Village, Sobang District, Lebak Regency, Banten Province.
Abstrak: Pemanfaatan nira aren di desa hariang sudah dilakukan untuk waktu yang ‎cukup lama, oleh karena itu dilakukan penelitian untuk mengetahui seberapa besar ‎potensi nira aren yang dapat di manfaatkan. Penelitian ini bertujuan untuk ‎menduga potensi tegakan aren yang dapat di produksi niranya, mengidentifikasi ‎tingkat regenerasi serta pola persebaran, mengetahui tipologi habitat aren, serta ‎mengidentifikasi spesies vegetasi yang tumbuh di sekitar habitat aren. Penelitian ‎dilakukan pada kedua lereng yang menghadap kearah mata angin barat dan timur ‎dengan menggunakan metode observasi lapang, wawancara kepada beberapa ‎narasumber, analisis vegetasi dengan ukuran plot 20m x 20m, serta mencari ‎beberapa literatur yang sebagai acuan dan pendukung untuk hasil yang di dapat ‎dalam penelitian. Pada hasil penelitian di temukan persentase potensi tumbuhan ‎aren yang dapat di produksi sebesar 3% pada desa Hariang. Tingkat regenerasi ‎aren yang di dapat berada pada kategori bagus dengan pola persebaran yang ‎seragam. Sebanyak 48 jenis tumbuhan di temukan pada habitat aren. Vegetasi ‎hutan di sekitar desa hariang tergolong kedalam hutan rakyat dengan pola kebun ‎campuran. Hasil dari penelitian ini dapat dijadikan sebagai data tambahan dalam ‎upaya pengelolaan habitat aren.‎, Utilization of palm sap in Hariang village has been carried out for quite a ‎long time, therefore a study was conducted to find out how much potential palm ‎sap can be utilized. This study aims to estimate the potential of sugar palm stands ‎that can be produced for sap, identify the level of regeneration and distribution ‎patterns, determine the typology of sugar palm habitat, and identify vegetation ‎species that grow around the sugar palm habitat. The study was conducted on ‎both cliffs, each facing the west and east cardinal directions using field ‎observation methods, interviews with several sources, analysis of vegetation with ‎a plot size of 20m x 20m, and looking for some literature that can be used as a ‎reference and support for the results obtained. obtained in research. In the results ‎of the study, it was found that the percentage of potential sugar palm plants that ‎could be produced was 3% on Hariang village. The level of regeneration of sugar ‎palm that can be obtained is in the good category with a regular distribution ‎pattern. A total of 48 species of plants were found in the sugar palm habitat. The ‎forest vegetation around Hariang village is classified as community forest with ‎mixed garden pattern. The results of this study can be used as additional data ‎needed in efforts to manage sugar palm habitat.‎
Keyword: potential, sugar palm, typology

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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