Judul: Analisis Daya Saing Ekspor Produk Rotan  Indonesia di Pasar Internasional Periode 2017- 2021
Abstrak: Indonesia merupakan negara eksportir utama produk rotan di dunia, namun persaingan cukup berat dari negara China yang menggunakan rotan sintetis perlu diperhatikan. Penelitian ini bertujuan untuk menganalisis daya saing komparatif dan kompetitif serta faktor apa saja yang mempengaruhi pertumbuhan ekspor produk rotan Indonesia periode 2017-2021. Metode yang digunakan berturut-turut adalah Revealed Comparative Advantage, Indeks Spesialisasi Perdagangan, dan Constant Market Share. Hasil penelitian menunjukkan ekspor produk rotan Indonesia periode 2017-2021 memiliki keunggulan komparatif yang kuat yang ditunjukkan oleh nilai indeks Revealed Comparative Advantage berkisar 11,38- 80,63, dan memiliki keunggulan kompetitif dan berada pada tahap kematangan yang ditunjukkan oleh nilai Indeks Spesialisasi Perdagangan berkisar 0,89-1. Analisis CMS menunjukkan bahwa faktor pertumbuhan standar, komposisi komoditas, dan distribusi pasar berpengaruh positif, sedangkan faktor daya saing berpengaruh negatif terhadap pertumbuhan ekspor produk rotan Indonesia periode 2017-2021., Indonesia is a major exporter of rattan products in the world, but competition from China which uses synthetic rattan needs to be considered. This study aims to analyze the comparative and competitive advantages as well as factors affecting the growth of Indonesian rattan product exports in the period 2017-2021. The methods used are, respevtively, Revealed Comparative Advantage, Trade Specialization Index, and Constant Market Share. The results showed that the export of Indonesian rattan products for the 2017-2021 period had a strong comparative advantage as indicated by the Revealed Comparative Advantage index value ranging from 11.38- 80.63, and a competitive advantage at the maturity stage as indicated by the Trade Specialization Index value ranging from 0.89-1. CMS analysis showed that general increase in world exports, commodity composition, and market distribution had positive effects, while the competitiveness factor had a negative effect on the growth of Indonesia's rattan product exports for the 2017-2021 period.
Keyword: Revealed Comparative Advantage, Constant Market Share, Competitiveness, Trade  Specialization Index, Rattan Products

Judul: Faktor-faktor yang Memengaruhi Daya Saing Produk Olahan Rotan Indonesia di Kawasan ASEAN dan Tiongkok
Abstrak: Daya saing ekspor komoditi merupakan salah satu indikator yang digunakan untuk mengukur kemajuan perekonomian negara. Penelitian ini bertujuan menganalisis daya saing produk olahan rotan Indonesia di kawasan ASEAN dan Tiongkok dengan melihat keunggulan komparatif beserta faktor-faktor yang memengaruhinya. Periode analisis yang digunakan pada penelitian ini yaitu dari tahun 2001 sampai 2012 dengan menggunakan metode Revealed Comparative Advantage (RCA), dan menggunakan pendekatan data panel melalui E-views 6. Hasil penelitian ini menunjukkan bahwa komoditi produk olahan rotan memiliki daya saing yang tinggi di negara Malaysia dan Singapura. Adapun faktor-faktor yang memengaruhi daya saing produk olahan rotan ialah GDP per kapita Indonesia, harga ekspor komoditi ke negara tujuan, harga ekspor pesaing, nilai tukar rupiah, volume ekspor produk olahan rotan, jumlah produksi produk olahan rotan dan dummy dibukanya ekspor rotan berpengaruh signifikan terhadap daya saing produk olahan rotan Indonesia.
Keyword: Daya Saing, Panel Data, Revealed Comparative Advantage (RCA), Rotan

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.
Keyword: