Judul: Analisis daya saing madu alami Indonesia
Abstrak: Tujuan penelitian ini adalah menganalisis daya saing madu alami Indonesia di negara tujuan ekspor dan mengidentifikasi faktor-faktor yang berpengaruhi terhadap daya saing madu alami. serta menentukan upaya-upaya strategi peningkatan daya saing madu alami Indonesia di pasar internasional. Indeks RCA digunakan untuk mengetahui keunggulan komparatif, sedangkan indeks EPD digunakan untuk mengetahui keunggulan kompetitif dan indeks ISP digunakan untuk mengetahui bahwa Indonesia termasuk negara eksportir atau importir madu. Hasil analisis dengan metode RCA menunjukkan bahwa madu alami Indonesia memiliki daya saing yang lemah dan tidak memiliki keunggulan komparatif karena memiliki nilai indeks RCA < 1. Posisi pasar madu alami indonesia berada pada posisi rising star di negara Brunei Darussalam dan Hongkong; falling star di negara Malaysia dan Singapura; dan retreat di negara Australia. Sedangkan hasil ISP menunjukkan bahwa Indonesia merupakan negara importir madu karena rata-rata nilai ISP kurang dari 0. Faktor yang memengaruhi daya saing madu alami adalah rendahnya produktivitas madu serta peran pemerintah yang kurang memerhatikan para petani madu Indonesia.
Keyword: Competitiveness, EPD, Honey, ISP, RCA, Competitiviness analysis, Honey farmers, National honey, Noney xport, Productivity

Judul: Situation Analysis of Indonesian Honey  Commodity Trade in the International Market
Abstrak: Indonesia memiliki potensi besar untuk mengembangkan komoditas madu di pasar internasional karena kaya akan sumber daya alam yang dimiliki terutama pada sektor kehutanan. Namun, nilai dan volume ekspor madu Indonesia di pasar internasional dan kontribusi sektor kehutanan terhadap PDB masih sangat rendah. Penelitian ini bertujuan untuk menganalisis struktur pasar, daya saing, posisi perdagangan, serta strategi untuk mengembangkan ekspor madu Indonesia di pasar Internasional. Analisis dilakukan menggunakan metode Herfindahl Index (HI), Concentration Ratio (CR4), Revealed Comparative Advantage (RCA), Export Product Dynamic (EPD), dan Indeks Speliasisasi Perdagangan (ISP). Hasil penelitian menunjukkan bahwa struktur pasar produk madu alami di pasar internasional berbentuk persaingan monopolistik. Komoditas madu alami Indonesia kurang memiliki daya saing yang baik di pasar internasional. Indonesia juga berada pada tahap pengenalan dan cenderung menjadi negara importir. Pemerintah Indonesia maupun pihak terkait perlu menerapkan strategi yang berfokus pada diferensiasi produk, efisiensi produksi, penetrasi dan pertumbuhan pasar, serta produktivitas dan peningkatan kapasitas produksi., Indonesia has great potential to develop honey commodities in the international market because it is rich in natural resources, especially in the forestry sector. However, the value and volume of Indonesian honey exports in the international market and the forestry sector's contribution to GDP are still very low. This study aims to analyze market structure, competitiveness, trade position, and strategies to develop Indonesian honey exports in the international market. The analysis was carried out using the Herfindahl Index (HI), Concentration Ratio (CR4), Revealed Comparative Advantage (RCA), Export Product Dynamic (EPD), and Trade Specialization Index (ISP) methods. The results of the research show that the market structure of natural honey products in the international market is in the form of monopolistic competition. Indonesia's natural honey commodity lacks competitiveness in the international market. Indonesia is also in the introduction stage and tends to become an importing country. The Indonesian government and related parties need to implement a strategy that focuses on product differentiation, production efficiency, market penetration and growth, as well as productivity and production capacity increases.
Keyword: daya saing, ekspor, madu, pasar internasional, strategi

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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