Judul: Pemanfaatan Lahan Bekas Tambang pada Sektor Peternakan : Sebuah Analisis Biaya Manfaat (Studi Kasus Program Peternakan Sapi Terpadu PT KPC Kutai Timur)
Abstrak: Indonesia is a rich of coal resources country. It makes the mining companies grow rapidly in Indonesia. Currently the Ministry of Energy and Mineral Resources (ESDM) records that 5940 the mining permit (IUP) are non clean and clear, and 4624 the mining permit are clean and clear. The existence of the mining business brings many economic benefits, but, on the other hand, it brings the environmental damage, especially the soil where the mining activities do. Therefore, each mining company in Indonesia has been charged reclamation obilgation in ex-mining land which it is under law and ministerial regulation. After reclamation, a lot of things can do in ex-mining land, such as using exmining land in forestry, agriculture, fisheries, and livestock farming. PT KPC is one of the largest coal mining companies in Indonesia that is operating in Kutai Timur. In the context of reclamation of ex-minig land, PT KPC tries to use its exmining land in livestock farming by The Integrated Cow Farming Program (PESAT). This program is included in the company's CSR program and has been running since late 2009. PESAT is a integrated program between the breeding activities of Balinese caw and the local breeders training and internship program. Since the implementaion of this program, a lot of progress perceived by both the company and the community, thus, it is necessary to do research on the cost benefit analysis of it. The purposes of this study are: (1) to analyze the model or concept of PESAT, (2) to estimate the costs and benefits of the program, (3) to formulate stakeholder relations in the program, and (4) to identify the characteristics and perceptions of PESAT participants. The method used in this study consisted of descriptive analysis, cost benefit analysis, sensitivity analysis, stakeholder analysis and perceptual analysis. This study shows that PESAT’s concept which is done by PT KPC is the integrated program. It is consisted Balinese cow breeding and its byproducts, cultivation Dairy Cattle and their byproducts, vegetables and farm training Balinese Cows breeders in the form of an internship for 6 months. PESAT program was run so far has many benefits for the company and the community, as a result of the marketing of livestock and processed products, such as beef, milk, yogurt, ice milk and ice cream. Another benefit are the result of product marketing vegetables, compost fertilizer, an educational tourist attractions, a field laboratory STIPER Campus in East Kutai, a place or meeting room, a company guest lodge, the fieldwork practice and research, enhance the company's reputation and increase science breeders. Some of the benefites can be quantified, and some can 5 not .The costs incurred by the company towards PESAT program consists of investment costs and annual operating costs. PESAT program feasibility analysis is conducted based on several scenarios. The first scenario is the residual value of fixed assets is not taken into account, the obtained value of NPV about IDR-451 256 201, net B/C at 1, gross B/C at 1, and IRR at 5%. The second scenario is the residual value of fixed assets taken into account,
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Judul: Konsep Eco-Agroindustrial Estate di Kalimantan Tengah:  Industri Peternakan Sapi
Abstrak: Pemanfaatan limbah pertanian dan hasil samping proses produksi agroindustri berpeluang untuk dapat dimanfaatkan menjadi pakan ternak. Tujuan penelitian ini untuk mengkaji kelayakan pendirian industri peternakan sapi yang menerapkan konsep eco-agroindustrial estate di Kalimantan Tengah. Metode yang digunakan adalah metode kualitatif dan kuantitatif dengan melakukan analisis kelayakan. Hasil penelitian diperoleh bahwa pendirian industri peternakan penggemukan sapi di kawasan penerapan food estate Kalimantan Tengah mendukung penerapan konsep eco-agroindustrial estate. Keberadaan industri peternakan sapi ini berperan untuk memanfaatkan dedak, kulit singkong, ampas tahu, jagung giling serta hijauan tanaman dari industri sebelumnya sehingga dapat membentuk sistem aliran tertutup. Daya dukung sumber pakan yang tersedia dari industri sebelumnya mampu memenuhi kebutuhan 36.000 ekor sapi tiap tahunnya. Dari sisi finansial, nilai R/C ratio yang diperoleh sebesar 1,23. Industri ini masih layak dijalankan dengan maksimum penurunan harga jual 20% atau peningkatan harga bahan baku maksimal 35%. Industri peternakan sapi ini layak untuk dikembangkan berdasarkan analisis teknis dan teknologis, finansial dan lingkungan., The utilization of agricultural waste and by-products of the agro-industrial production process has the opportunity to be used as animal feed. The purpose of this study is to examine the feasibility of establishing a cattle farming industry that applies the concept of eco-agroindustrial estate in Central Kalimantan. The method used is a qualitative and quantitative method by conducting a feasibility analysis. The results obtained that the establishment of a cattle fattening livestock industry in the area of application of food estate Central Kalimantancan support the application of the concept eco-agro-industrial estate. The role of the cattle husbandry industry is to utilize bran, cassava peel, tofu dregs, milled corn and forage plants as feed to form a closed flow system. The carrying capacity of available feed sources from the previous industry can meet the needs of 36,000 head of cattle each year. From the financial analysis, the value of the R/C ratio obtained is 1.23. This industry is still feasible to run with a maximum selling price decrease of 20% or an increase in the price of raw materials to a maximum of 35%. This cattle farming industry is feasible to be developed based on technical and technological, financial and environmental analysis.
Keyword: Eco-agroindustrial Estate, Closed loop system, Cattle fattening industry, Central Kalimantan

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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