Judul: Study Development Of Tuna Fishing Based Community In Ambon City
Abstrak: Ambon city has developed quite rapidly, exceeding the district or city in Maluku. It can be seen from the average annual economic growth in the last five years, ranging from 5.5 to 7%. In terms of economic structure, economic Ambon City in the last three years (2008-2010), Fishery sector contributes an average of 17% per year, with a relatively stable growth of about 4.5% per year to PDRB. Large pelagic fish scattered on the south coast ecoregion Ambon city with an abundance of stock amounting to 620.6 tons per month with maximum sustainable yield (MSY) of 310.3 tons per month Existing resources can be utilized by developing community-based tuna fishing in the city of Ambon. By knowing the factors of production, can be made strategies for the development of community-based tuna fishing industry in the city of Ambon. The purpose of this study was to describe the present condition (present status) of tuna fishery in the city of Ambon, to analyze the factor influence levels of production towards the the tuna fishing development in the city of Ambon, to formulate strategic priority-based tuna fisheries development community in Ambon City. This study is expected to provide benefits to the development of science and technology in the field of fisheries, information material for tuna fisheries managers in developing a business, an input to government policy-making in the development of the tuna fishery in the city of Ambon, about the development of the fishing industry, especially the tuna fishery in the City Ambon. The study was conducted in January and March of 2013 in Ambon city there is Laha Village, Latuhalat Village and Seri Village. This study is expected to provide benefits is a method of collecting primary and secondary data. Respondents were selected by purposive sampling, with fishermen being taken was 60, for the analysis of the priority development of the tuna fishing industry as much as 6 people representing fishermen, tuna companies, and consumers. To describe the present status tuna fishery in Ambon analysis used is descriptive analysis to describe the start of production, fishing up in Ambon city. To analyze the influence of the factors production to the development of the tuna fishing in Ambon city analysis used is multiple regression analysis. SWOT analysis (strengths, weaknesses, opportunities, and threats) was conducted to determine what strategies are carried out for the development of the tuna fishing industry. SWOT results are used as a determinant of the strategic priorities of development of the tuna fishery are analyzed with hierarchy approach (AHP). Tuna fishery is one that is in the city of Ambon, in 2011 the production volume reached 1769.24 tons. Ambon has 5 districts is Nusaniwe District, Sirimau, Bay of Ambon, Ambon Bay Baguala and South Leitimur. Subdistrict Nusaniwe and Sirimau is the largest tuna producing area in Ambon city, in 2011 the number of tuna fisheries production amounted to 615.25 and 578.36 tonnes (Ambon City Department of Fisheries, 2012). Fishermen Ambon did tuna fishing operations using a trolling fishing line. The length of the vessel reached about 7- 11 meters, with a width
Keyword: Based Community, Ambon City, Tuna fisheries development

Judul: Tuna fisheries management strategies in an optimal and sustainable in Buru District, Maluku Province
Abstrak: Tuna fishery is one of the leading sectors of fisheries in Buru District. This fishery has been going on a few years ago, and an artisanal fisheries that have evolved from the subsistence fisheries to commercial fisheries. This sector is a significant contribution to meeting the needs of food, employment, public welfare, and the development of regional economy. Sustainability of these contributions, depending on the management of the fishery. Good fisheries management is to ensure the sustainability of the fish resources, environmental, socio-economic, and institutional aspects. To carry out the management approach, it takes a variety of information such as biology, ecology, socio-economic and institutional information, as an evaluation, improvisation, and execution management. This study was conducted as an attempt to provide such information . The purpose of this study was to : (1) analyzing the condition of tuna resources in Buru District which includes estimates of potential maximum sustainable yields and some population parameters, (2) to analyze the feasibility of tuna fishing units, (3) optimization of the allocation of fishing effort, and (4) formulate strategies for optimal and sustainable management of tuna fisheries in Buru District . Surplus production model (SPM) was used to assess the maximum sustainable yield of tuna fish resources. Some parameters of tuna populations known with length and weight analysis, the pattern of growth, mortality rate and exploitation rate. Feasibility of tuna fishing units were analyzed using financial feasibility analysis, which consists of business analysis and investment criteria analysis. Business analysis include: analysis of revenue, revenue cost ratio (R/C), payback period (PP) and the break-even point (BEP). Analysis of investment criteria include the net present value (NPV), internal rate of return (IRR) and net benefit cost ratio (Net B/C). Optimization of the allocation of fishing unit, calculated using a linear goal programming (LGP). Formulation and prioritization of management strategies performed with strength weakness opportunity threath analysis (SWOT), and analysis of quantitative strategic planning matrix (QSPM). Maximum sustainable yield of tuna fish resources in Buru District estimated at about 867 tons/year, with optimum fishing effort is at 1101 units/year. Fork length and weight of tuna fish caught that ranged from 85.5 to 170.8 cm (L = 180.6 cm) and 12.0 to 91.8 kg, with a range of ages 1–6 years, fishing mortality enough high, with the rate of exploitation between the years 2010–2011 has exceeded the optimum exploitation rate in the range 65% –74%, where the actual fishing effort exceeds the optimum fishing effort. Feasibility analysis of the three categories handline units conducted with business analysis and analysis of investment criteria, showed that handline units that has a good business feasibility is, the first, handline unit 5.5 HP with an annual profit of Rp10 710 407, revenue cost ratio (R/C) > 1, the payback period is 1.30 years, the value of BEP is Rp15,485,903 or 939.88 kg, with NPV value is Rp42,714,374 > 0 , IRR (84.6%) > 12% and Net B/C (4.06) > 1. Second, handline unit 15 HP with an annual profit of Rp15,164,117, revenue cost ratio of 1.14, the payback period is 2.37 years ,
Keyword: Buru District, management strategies, optimal and sustainable, tuna fisheries

Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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