Judul: Penilaian Unit Penangkapan Pancing Rumpon di Palabuhanratu, Kabupaten Sukabumi, Jawa Barat
Abstrak: Tuna total production with rod fishing increase 0.73% in 2011, and total of rod fishing unit increase 1.55% in the same time. Technical and economical analysis must be done for we know how the feasibility of rod fishing unit’s business. The objective of the research is to describe the rod fishing unit, to calculate the benefit, and the investment of rod fishing unit’s business in Palabuhanratu waters. The research is case study of rod fishing unit’s business. Data analysis used description, technical and financial analysis. There are four types of rod fishing, those are troll fishing, pancing jerigen, pancing layanglayang and hand line. The rod fishing is not difficult in operation. Business of the rod fishing unit can give a profit Rp 67,245,500.00 and payback period is 4.2 years. The value of NPV is more than 0 (zero), Net B/C is more than 1 and IRR is more than value of interest rate. The business of rod fishing unit is not sensitive to the fuel’s price increasing. The decision makers can help the fishermen to improve their capital from finance institution, and do the detail technical analysis about rod fishing unit operation and its influence to stock equilibrium
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Judul: Keragaan Unit Penangkapan Bagan Apung di PPN Palabuhanratu Sukabumi Jawa Barat
Abstrak: In 2011, bagan apung was the second largest fishing gear after kincang. It made up 23% of total fishing gears in Palabuhanratu. From 2007 to 2010, the number of the gear has decreased by 4%/year, how ever in 2011., it increased 12%. It was because the efficiency and the effectiveness of bagan apung was higher as compared to other gears. The change of the gear numbers, showed the performance of bagan apung fishing unit from catches composition and financial analysis. The catches composition of bagan apung was fluctuative and different, either for those which use fishing vessels or not. Based on effort analysis, the catches selling showed that the average profit for fishermen who own bagan apung with fishing vessel was Rp 22.441.017,00/year, for while for fishermen who own bagan apung without fishing vessel was Rp 18.928.250,00/year. The fishermen who own bagan apung with fishing vessels earned money from vessels renting about Rp 120.910.444/year. Based on R/C and ROI value, it can be seen that both types of bagan apung were feasible business. If the income was only from vessel renting, the business of bagan apung with fishing vessel was no longer feasible since its R/C is about 0,61 (R/C <1). Payback period of bagan apung with vessel was 6,99 years, and without vessel was 0,98 years. The investment analysis showed that the business of fishermen who own bagan apung with fishing vessel was feasible because by using interest rate at 13%, the NPV was Rp 8.187.023,00/year, Net B/C > 1 and IRR > 1 from interest rate at 13%.
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Judul: Penggunaan Teorema Homeomorphy 2-Manifold dan Teorema Euler Poincare pada Torus 𝑇�� dan Simplicial Complex 𝐾��
Abstrak: Two dimensional topological spaces are said to be homeomorphic if they have the same topological invariant, where one of topological invariant used is an Euler characteristic. Homeomorphy 2-Manifold’s Theorem and Euler Poincare’s Theorem are used to distinguish two topological spaces. Homeomorphy 2-Manifold’s Theorem uses Euler characteristic to identify two dimensional topological spaces. Euler Poincare’s Theorem is an alternative way to find Euler characteristic with Betti number, which is topological invariant as well. The objective of this paper is to investigate the homeomorphism of torus 𝑇����� and simplicial complex 𝐾�����. Topological space torus and simplicial complex 𝐾����� have the same Euler characteristic, which is two. Based on Homeomorphy 2-Manifold’s Theorem topological space torus 𝑇����� and simplicial complex 𝐾����� is homeomorphic.
Keyword: simplicial, torus, Euler, homeomorphism, topology