Judul: Market Diversification of Indonesian Apparel Exports to Non Traditional Countries and Its Determinant
Abstrak: Pakaian jadi menjadi salah satu sektor prioritas dalam industri manufaktur dan menghasilkan devisa terbesar dalam industri tekstil. Ekspor pakaian jadi Indonesia saat ini masih cenderung didominasi oleh pasar negara tradisional. Akan tetapi, dalam beberapa tahun terakhir ekspor ke negara tradisional tersebut berfluktuatif, sehingga ekspansi pasar perlu dijadikan strategi untuk meningkatkan kinerja perdagangan ekspor pakaian jadi Indonesia. Penelitian ini bertujuan untuk menganalisis diversifikasi pasar ekspor pakaian jadi Indonesia ke negara non tradisional beserta determinannya. Untuk mengetahui faktor-faktor yang mempengaruhi ekspor pakaian jadi Indonesia ke negara non tradisional selama periode 2016 – 2020 digunakan metode analisis berupa RCA, EPD, X-Model dan regresi data panel untuk menjawab tujuan penelitian. Hasil penelitian menunjukkan produk pakaian jadi Indonesia memiliki potensi dan daya saing tinggi di negara Algeria, Brunei Darussalam, Guinea, Iraq, Israel, Somalia, Fiji, Slovenia dan Sudan. Hasil dari regresi data panel menunjukkan bahwa GDP negara mitra, FDI, tarif dan RCA berpengaruh signifikan terhadap ekspor pakaian jadi Indonesia., Apparel is one of the main priority sectors in the manufacturing industry that generates the largest source of foreign exchange in the textile industry. Indonesian apparel exports currently tend to be dominated by traditional state markets. However, in recent years exports to these traditional countries have fluctuated. Therefore, market expansion is needed to enhance the performance of Indonesian apparel export. This study aims to analyze market diversification of apparel export to non-traditional countries and its determinant. To find out the factors that influenced the export of Indonesian apparel to non-traditional countries during 2016 – 2020 period, analytical methods such as RCA, EPD, X-Model and panel data regression were utilized to answer the research objectives. The result shows that Indonesian apparel products have high potential and competitiveness in Algeria, Brunei Darussalam, Guinea, Iraq, Israel, Somalia, Fiji, Slovenia, dan Sudan. Panel data regression analysis shows that the partner’s country GDP, FDI, tariffs, and RCA significantly affect Indonesian apparel exports.
Keyword: panel data, EPD, non traditional, apparel, RCA

Judul: Analysis of Indonesian Footwear Export Market Diversification and its Determinants
Abstrak: Alas kaki merupakan komoditas unggulan ekspor Indonesia. Namun, destinasi ekspor alas kaki Indonesia masih didominasi oleh beberapa negara sehingga rawan akan guncangan ekonomi global. Jika dibandingkan dengan negara pesaing yaitu China dan Vietnam, ekspor alas kaki Indonesia masih lebih rendah. Perlu dilakukan ekspansi pasar ekspor ke negara yang belum menjadi tujuan utama ekspor untuk mendorong kinerja perdagangan alas kaki Indonesia. Penelitian ini memiliki tujuan untuk menganalisis diversifikasi pasar ekspor alas kaki Indonesia dan determinannya. Metode STR digunakan untuk menganalisis negara tujuan ekspor, metode RCA, EPD, dan X-Model digunakan untuk mengetahui daya saing alas kaki Indonesia, dan regresi data panel digunakan untuk mengetahui faktor-faktor yang memengaruhi ekspor alas kaki Indonesia. Hasil penelitian memperlihatkan Indonesia memiliki daya saing yang kuat di negara Argentina, Austria, Brazil, Cili, Ceko, Yunani, Panama, Plandia, Spanyol, dan Swedia. Regresi data panel memperlihatkan bahwa nilai RCA, GDP negara tujuan ekspor, nilai tukar riil, dan harga ekspor memiliki pengaruh signifikan terhadap ekpor alas kaki Indonesia., Footwear is Indonesia, Footwear is Indonesia's leading export commodity. However, Indonesia's footwear export destinations are still dominated by several countries, making them vulnerable to global economic shocks. When compared with competing countries, namely China and Vietnam, Indonesia's footwear exports are still lower. It is necessary to expand the export market to countries that are not yet the main export destination to boost the performance of Indonesia's footwear trade. This research aims to analyze the diversification of the Indonesian footwear export market and its determinants. The STR method is used to analyze export destination countries, the RCA, EPD and X-Model methods are used to determine the competitiveness of Indonesian footwear, and panel data regression is used to determine the factors that influence Indonesian footwear exports. The research results show that Indonesia has strong competitiveness in the countries of Argentina, Austria, Brazil, Chile, Czech Republic, Greece, Panama, Poland, Spain and Sweden. Panel data regression shows that the RCA value, GDP of nonmain destination countries, real exchange rates, and export prices have a significant influence on Indonesian footwear exports.
Keyword: competitiveness, diversification, footwear

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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