Judul: Faktor-faktor yang memengaruhi Structure-Conduct-Performance (SCP) industri migas di Indonesia periode 1998-2008
Abstrak: Pembangunan Indonesia khususnya pada sektor industri mengalami perkembangan yang pesat. Industri migas merupakan salah satu sumber penerimaan negara yang berperan penting dalam perekonomian Indonesia. Industri ini merupakan salah satu sumber daya alam yang tidak dapat diperbaharui. Tahun-tahun terakhir ini produksi minyak mentah Indonesia terus menurun, sedangkan kebutuhan meningkat terus. Iklim investasi yang kondusif untuk eksplorasi dan ekploitasi migas perlu didorong. Dicari suatu kebijakan agar pelaku ekonomi baik. Perusahaan-perusahaan asing saat ini telah menguasai sektor industri migas Indonesia. Penelitian ini bertujuan untuk meneliti bagaimana dan faktor-faktor apa yang memengaruhi struktur, perilaku dan kinerja industri migas selama tahun 1998-2008. Kondisi ini dipengaruhi oleh peran pemerintah sebagai pembuat kebijakan dalam industri migas Indonesia. Melalui metode deskriptif, penelitian ini bertujuan untuk mengidentifikasi bagaimana perilaku Industri migas Indonesia dan melalui metode kuantitatif, penelitian ini bertujuan menganalisis bagaimana struktur dan kinerja industri migas Indonesia.
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Judul: Analisis Struktur, Perilaku dan Kinerja Pertambangan Non-Migas di Indonesia
Abstrak: This study aims to analyze the structure, conduct and performance of the mining industry of non-oil and gas in Indonesia and the factors that influence the performance of the mining industry of non-oil and gas in Indonesia. The data used are secondary data, the concentration ratio data, output value, value of inputs, value added, wages, production value and export value of minerals are available in a catalog issued by Statistics Indonesia Central Bureau of Statistics, in 2003 until 2007. Descriptive method used to analyze the behavior. Quantitative methods was two approaches, the SCP approach to analyze the structure and performance of non-oil mining and to analyze the performance of non-oil mining Indonesia using fixed effect panel data models. Market structure that occurs in non-oil mining is visible from a tight oligopoly concentration ratio of the two largest companies of each mineral that was 93.08 percent. Market entry barriers seen from the average MES each mineral was at 77.94 percent means that the barriers to entry to this sector was high. Market behavior can be seen from the pricing strategy used by companies as price takers because the prices prevailing in the mining sector is the market price (the seller and buyer agreements) of the world. Product strategy used by the business is to improve the quality of the products that can compete in world markets, while the promotion strategy, the company issued a publication through print and electronic media that shows the quality of products and companies. Performance seen from the estimates that show all the variables (X-efficiency, exports, productivity and the concentration ratio of the two largest firms) made positive effect on rates of return (PCM). Variables that have the greatest influence improve performance (PCM) is the efficiency-X (XEFF) and exports (EX).
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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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