Judul: Analysis of Indonesian Turmeric Competitiveness in Main Destination Countries
Abstrak: Indonesia sebagai salah satu produsen kunyit terbesar di dunia mempunyai potensi untuk berperan di pasar kunyit dunia sehingga mampu meningkatkan daya saing di pasar dunia. Penelitian ini bertujuan untuk menganalisis daya saing komparatif dan kompetitif ekspor kunyit Indonesia di negara tujuan utama. Metode yang digunakan adalah Revealed Comparative Advantage (RCA) dan Export Product Dynamic (EPD). Hasil analisis kunyit Indonesia berdaya saing komparatif kuat pada empat negara tujuan yaitu India, Amerika, Singapura, Korea Selatan, namun pada pasar Malaysia kunyit Indonesia tidak memiliki daya saing komparatif yang kuat. Analisis EPD menunjukkan bahwa kunyit Indonesia berada pada posisi Rising Star pada negara India dan Malaysia, sedangkan di negara Singapura dan Korea Selatan berada pada posisi Falling Star, dan Amerika Serikat berada pada posisi Lost Opportunity.
Keyword: competitiveness, EPD, RCA, turmeric

Judul: Analysis of Competitiveness and Factors Affecting Indonesian Cinnamon Powder Exports to  Main Destination Countries
Abstrak: Indonesia merupakan negara eksportir terbesar bubuk kayu manis (kode HS 090620) di dunia. Sejak 2012, nilai ekspor bubuk kayu manis Indonesia lebih tinggi dibandingkan dengan nilai ekspor kayu manis mentah. Namun nilai ekspor tersebut masih berfluktuatif dan cenderung menurun dibandingkan negara pesaing seperti Vietnam. Penelitian ini bertujuan untuk menganalisis daya saing, cakupan pemberlakuan NTM, dan faktor-faktor yang mempengaruhi ekspor bubuk kayu manis Indonesia ke 9 negara tujuan utama periode 2011-2020. Metode analisis yang digunakan pada penelitian ini adalah metode RCA, EPS, X-Model, pendekatan inventory, dan regresi data panel. Metode RCA menunjukkan bahwa bubuk kayu manis Indonesia memiliki daya saing yang kuat di 9 negara tujuan. Metode EPD menunjukkan posisi pasar retreat, falling star, dan rising star. X-Model menunjukkan pengembangan pasar optimis ke Swedia, potensial ke Belanda, Vietnam, Kanada, dan Jerman, sedangkan kurang potensial ke Amerika Serikat, Jerman, Brazil, dan Australia. Hasil regresi data panel menunjukkan harga ekspor, nilai tukar, LPI Indonesia, GDP riil per kapita negara tujuan, dan CR SPS memiliki pengaruh signifikan positif. Sedangkan dummy pandemi Covid-19 dan CR TBT memiliki pengaruh signifikan negatif., Indonesia is the largest exporter of cinnamon powder (HS code 090620) in the world. However, the export value is still fluctuating and tends to decrease compared to competing countries such as Vietnam. This study aims to analyze the competitiveness, scope of application of the NTM, and the factors that influence the export of Indonesian cinnamon powder to 9 main destination countries for the period 2011-2020. The analytical methods used in this research are RCA, EPD, X Model, inventory approach, and panel data regression. The RCA method shows that Indonesian cinnamon powder has strong competitiveness in 9 destination countries. The EPD method shows the retreat, falling star, and rising star market positions. The X-Model shows an optimistic market development to Sweden, potential to the Netherlands, Vietnam, Canada, and Germany, while less potential to the United States, Germany, Brazil, and Australia. The results of panel data regression show that export prices, exchange rates, LPI Indonesia, real GDP per capita of destination countries, and CR SPS have a significant positive effect. Meanwhile, the Covid-19 pandemic dummy and CR TBT had a significant negative effect.
Keyword: bubuk kayu manis, LPI, NTMs, daya saing, EPD, data panel

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: