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: Analysis of Indonesian Cinnamon Export Competitiveness in the United State Market
Abstrak: Indonesia termasuk produsen kayu manis di pasar dunia yang bersaing dengan Sri Lanka dan Vietnam. Negara tujuan ekspor kayu manis berada pada Amerika Serikat dengan laju pertumbuhan 16,9%. Harga kayu manis Indonesia selalu mengalami peningkatan, tetapi tidak sejalan dengan volume ekspor. Penelitian ini bertujuan menganalisis daya saing, potensi, serta faktor-faktor yang memengaruhi ekspor kayu manis di pasar Amerika Serikat. Fokus penelitian komoditas kayu manis dengan kode HS 090611 (Spices; cinnamon (Cinnamomum zeylanicum Blume), neither crushed nor ground) pada periode 2016-2021, penelitian ini menggunakan metode Revealed Comparative Advantage (RCA), Export Product Dynamic (EPD), Diamond Porter’s, X-Model Potential Export Product, dan Ordinary Least Square (OLS). Hasil penelitian menunjukan Indonesia mempunyai keunggulan komparatif dan kompetitif, namun perlu mengevaluasi hasil analisis Diamond Porter’s yang menunjukan minimnya kualitas tenaga kerja, minimnya negara tujuan ekspor, kemunduran luas lahan produksi kayu manis Indonesia, minimnya teknologi terbaru, dan minimnya kegiatan industri hilir kayu manis Indonesia. Indonesia juga berada pada pasar optimis serta memiliki hubungan signifikan dengan harga kayu manis, jumlah populasi, dan nilai kurs rupiah di negara tujuan ekspor utama., Indonesia is a cinnamon producer in the world market which competes with Sri Lanka and Vietnam. Cinnamon export destination countries are in the United States with a growth rate of 16.9%. Indonesian cinnamon prices always increase, but not in line with export volume. This study aims to analyze the competitiveness, potential, and factors that influence cinnamon exports to the United States market. The focus of research on cinnamon commodities with HS code 090611 (Spices; cinnamon (Cinnamomum zeylanicum Blume), neither crushed nor ground) in the 2016-2021 period, this study uses the Revealed Comparative Advantage (RCA) method, Export Product Dynamics (EPD), Diamond Porter's , X-Model Potential Export Product, and Ordinary Least Square (OLS). The results of the study show that Indonesia has comparative and competitive advantages, but it is necessary to evaluate the results of Diamond Porter's analysis which shows the lack of quality of labor, the lack of export destination countries, the decline in the area of land for Indonesian cinnamon production, the lack of the latest technology, and the lack of Indonesian cinnamon downstream industry activities. Indonesia is also in an optimistic market and has a significant relationship with cinnamon prices, population size, and the value of the rupiah exchange rate in major export destination countries.
Keyword: Diamond Porter’s, Export Dynamic Product, Ordinary Least  Square, Revealed Comparative Advantage, X-Model Potential Export Product

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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