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: Produktivitas Armada Penangkapan Pancing di Sekitar Rumpon, Palabuhanratu Jawa Barat
Abstrak: Fishing line with rumpon is the most widely used by fishermen in Palabuhanratu water’s, Sukabumi. This research aims to estimated productivity of fishing line with rumpon in different season, to figure out fishing ground, and total catch of training vessel PSP 01 operated in PPN Palabuhanratu water’s. Surveys method was used in the research and collected the primer and secondary data. The analysis of catch per unit effort (CPUE) was estimated to determine the position of fishing ground of tuna. Result of the research showed that off season during December to February, normal season in March until May, October until November, and peak season from June to September. The productivity of fishing line was increased from off season to peak season. The average CPUE from 2007 to 2011 comprises of 419,88 kg/trip (off season), 582,07 kg/trip (normal season I), 734,47 kg/trip (normal season II), and 818,90 kg/trip (peak season) respectively. The fishing ground of training vessel PSP 01 is located at the southern water’s of Palabuhanratu (07035’188 – 07059’874 South dan 106018’096 – 106025’112 East).
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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