Judul: Analysis of Indonesian Wooden Furnitures Product Competitiveness in the Global Markets on Period 2017 – 2021
Abstrak: Industri wooden furnitures memiliki potensi sebagai salah satu komoditas yang dapat mendukung perekonomian Indonesia karena dinilai cukup menjanjikan dan melihat adanya peluang produksi yang semakin hari semakin bertambah. Penelitian ini bertujuan menganalisis daya saing komparatif, kompetitif, dan faktor faktor yang mempengaruhi ekspor produk wooden furnitures Indonesia di pasar dunia pada periode 2017 – 2021. Analisis data yang digunakan dalam penelitian ini terdiri dari Revealed Comparative Advantage (RCA) untuk menganalisis keunggulan komparatif, Indeks Spesialisasi Perdagangan (ISP) untuk menganalisis keunggulan kompetitif, dan Constant Market Share (CMS) untuk menganalisis faktor-faktor yang berpengaruh dalam ekspor produk wooden furnitures Indonesia di pasar dunia. Hasil penelitian menunjukkan keunggulan komparatif produk wooden furnitures Indonesia berdaya saing kuat untuk produk wooden furnitures for kitchen use, wooden furnitures for bedroom use, dan wooden furnitures other than sedangkan produk wooden furnitures for office use berdaya saing lemah. Keunggulan kompetitif produk wooden furnitures Indonesia dominan berada pada tahap pertumbuhan, kecuali produk wooden furnitures other than yang sudah berada pada tahap kematangan. Faktor yang memberikan pengaruh positif terhadap pertumbuhan ekspor produk wooden furnitures Indonesia yaitu pertumbuhan standar, komposisi komoditas, dan daya saing sedangkan faktor distribusi pasar berpengaruh negatif., The wooden furniture industry has the potential as one of the commodities that can support the Indonesian economy because it is considered quite promising and sees production opportunities that are increasing day by day. This study aims to analyze comparative competitiveness, competitiveness, and the factors that affect the export of Indonesian wooden furniture products in the world market in the period 2017 – 2021. The data analysis used in this study consists of Revealed Comparative Advantage (RCA) to analyze comparative advantage, Trade Specialization Index (ISP) to analyze competitive advantage, and Constant Market Share (CMS) to analyze the factors that influence the export of Indonesian wooden furniture products in the world market. The results show that the comparative advantage of Indonesian wooden furniture products has strong competitiveness for wooden furniture products for kitchen use, wooden furniture for bedroom use, and wooden furniture products other than wooden furniture products for office use. The competitive advantage of Indonesian wooden furniture products is dominantly at the growth stage, except for wooden furniture products other than which are already at the maturity stage. Factors that have a positive influence on the export growth of Indonesian wooden furniture products are standard growth, commodity composition, and competitiveness, while market distribution factors have a negative effect.
Keyword: wooden furnitures, competitiveness, RCA, ISP, CMS

Judul: Analisis Daya Saing Produk Wooden Furnitures Indonesia di Pasar Internasional
Abstrak: Tujuan dari penelitian ini adalah menganalisis daya saing dan faktor-faktor yang mempengaruhi pertumbuhan ekspor produk wooden furnitures Indonesia pada periode 2007-2016. Produk wooden furnitures yang dianalisis terdiri atas wooden furniture for office use (WFO), wooden furniture for kitchen use (WFK), wooden furniture for bedroom use (WFB), dan wooden furniture other than office, kitchen or bedroom use (WOO). Analisis Revealed Comparative Advantage (RCA) dan Indeks Spesialisasi Perdagangan (ISP) digunakan untuk menganalisis keunggulan komparatif dan kompetitif produk, sedangkan Contant Market Share (CMS) digunakan untuk menganalisis faktor-faktor yang mempengaruhi pertumbuhan ekspor. Hasil penelitian menunjukkan produk WFB dan WOO memiliki keunggulan komparatif dan kompetitif yang telah memasuki tahap kematangan. Produk WFK meskipun telah mencapai tahap kematangan, namun keunggulan komparatifnya terus berkurang. Produk WFO belum memiliki keunggulan komparatif dan berada pada tahap pengembangan ekspor. Faktor-faktor yang mempengaruhi pertumbuhan ekspor Indonesia secara positif adalah pertumbuhan standar dan komposisi komoditas, sementara faktor daya saing memberikan kontribusi yang negatif.
Keyword: wooden furnitures, daya saing, Revealed Comparative Advantage, Trade Specialization Index, Constant Market Share

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: