Judul: Daya Saing, Dinamika, dan Determinan Ekspor Kacang Mete Kupas Indonesia Ke Negara Tujuan Utama
Abstrak: Komoditas pertanian memiliki peran strategis dalam meningkatkan perekonomian Indonesia. Kacang mete termasuk salah satu komoditas pertanian yang paling banyak diperdagangkan. Potensi ekspor kacang mete kupas akan memberikan harga yang lebih tinggi dibandingkan dengan mete gelondong dan banyak potensi nilai tambah lainnya. Penelitian ini menganalisis daya saing, dinamika dan determinan ekspor kacang mete kupas Indonesia ke 8 negara tujuan utama dalam periode 2010-2019. Metode penelitian yang digunakan adalah RCA, EPD, X-Model dan regresi data panel. Analisis RCA menunjukkan ekspor kacang mete kupas Indonesia ke negara tujuan utama memiliki keunggulan komparatif kecuali Belanda. Analisis EPD menunjukkan posisi pasar rising star dan falling star. Analisis X-Model menunjukkan potensi pengembangan pasar ekspor kacang mete kupas Indonesia optimis di Kanada, serta potensial di 7 negara tujuan lainnya. Analisis gravity model menunjukkan bahwa GDP perkapita negara tujuan, GDP perkapita Indonesia dan daya saing ekspor berpengaruh positif, sedangkan harga ekspor dan nilai tukar riil berpengaruh negatif . Tetapi variabel jarak geografis dan dummy FTA tidak berpengaruh terhadap nilai ekspor kacang mete kupas Indonesia., Agricultural commodities have a strategic role in improving the Indonesian economy. Cashew nuts are one of the most traded agricultural commodities.The export potential of shelled cashews will provide a higher price compared to cashew nuts and many other potential added values. This study analyzes the competitiveness, dynamics and determinants of Indonesian shelled cashew exports to 8 main destination countries in the 2010-2019 period. The research method used is RCA, EPD, X-Model and panel data regression. RCA analysis shows that Indonesia's shelled cashew nut exports to the main destination countries have a comparative advantage except the Netherlands. The EPD analysis shows rising star and falling star market positions. The X-Model analysis shows that the potential development of the Indonesian shelled cashew nut export market is optimistic in Canada, as well as the potential in 7 other destination countries. The gravity model analysis shows that the GDP per capita of the destination country, Indonesia's GDP per capita and export competitiveness have a positive effect, while export prices and the real exchange rate have a negative effect. However, the geographical distance and the dummy FTA have no effect on the export value of Indonesian shelled cashew nuts.
Keyword: EPD, shelled cashew nuts, gravity model, RCA, X-Model, EPD, shelled cashew nuts, gravity model, RCA, X-Model

Judul: Analisis Daya Saing dan Faktor-Faktor yang Memengaruhi Ekspor Kacang Mete Indonesia di Pasar Internasional
Abstrak: Kacang mete merupakan produk ekspor pertanian yang berkontribusi pada Produk Domestik Bruto (PDB) sebesar 15,48%. Volume produksi kacang mete Indonesia dalam sepuluh tahun terakhir stabil dengan tren meningkat serta volume ekspor cenderung fluktuatif. Penelitian ini bertujuan untuk menganalisis potensi pasar ekspor kacang mete Indonesia di pasar internasional periode 2011-2020. Metode yang digunakan yaitu RSCA, EPD, X-Model, dan Gravity Model. Hasil RSCA menunjukkan kacang mete Indonesia memiliki keunggulan komparatif di pasar Vietnam dan India, serta tidak memiliki keunggulan komparatif di pasar RRT. Analisis EPD menunjukkan bahwa posisi kacang mete Indonesia di Vietnam dan India adalah falling star dan posisi lost opportunity di RRT. Hasil analisis X-Model menunjukkan Indonesia memiliki pasar potensial di Vietnam dan India, namun pasar kurang potensial di RRT. Variabel harga kacang mete Indonesia dan jarak ekonomi berpengaruh signifikan, sedangkan variabel PDB riil Indonesia, PDB riil negara tujuan, dan harga kacang mete Pantai Gading tidak signifikan terhadap perubahan ekspor kacang mete Indonesia., Cashew nuts are an agricultural export product that contributes to the Gross Domestic Product (GDP) of 15.48%. The production volume of Indonesian cashew nuts in the last ten years has tended to be stable increasing trend and export volumes have tended to fluctuate. This study aims to analyze the potential of the Indonesian cashew nut export market in the international market for the 2011-2020 period. The methods used are RSCA, EPD, X-Model, and Gravity Model. RSCA shows that Indonesian cashew nuts have a comparative advantage in Vietnam and India, and do not have a comparative advantage in PRC. EPD shows that the position of Indonesia in Vietnam and India is a falling star and a lost opportunity position in PRC. X-Model shows that Indonesia has a potential market in Vietnam and India, but less potential market in PRC. The variable price of Indonesian cashews and economic distance has a significant effect, while the variables of Indonesia's real GDP, the real GDP of the destination country, and the price of Ivory Coast cashews have no significant effect on changes in cashew nut exports.
Keyword: EPD, gravity model, RSCA, X-Model

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: