Judul: Model Pengelolaan Sumberdaya Udang Penaeidae spp di Kabupaten Cilacap Provinsi Jawa Tengah
Abstrak: Cilacap is one of fishery centers in Indonesia, with one of the common best product is shrimp. Shrimp capture fisheries in Cilacap are majority using trammel net. Nowadays, the actual condition shows that it occured biological degradation on shrimp resources. This marked by production decline on shrimp production. Shrimp production on among 2004-2008 declined on average 7,2%. To achieve the study goals, the data was analyzed by 4 approaches: 1) Specifying maximum sustainable yields of shrimp resources in Cilacap by bioeconomy analysis; 2) Mapping mangrove area in Cilacap by using Geographic Information System Analysis; 3) Reviewing the factors of shrimp production decline by Ishikawa method; 4) Arranging management model by SWOT analysis and Analytic Hierarchy Process (AHP). SWOT analysis used for arranges the management strategy of shrimp resources. While Analytic Hierarchy Process (AHP) used for support arrangement of some priority from many choices. This study proved that shrimp production decline is in the line with mangrove area decline. Mangrove area decline influenced toward shrimp population and in the future will cause shrimp production decline. Considering the significant of mangrove advantages for fish resource sustainability, so strategy for increasing environmental capacity and shrimp resources, as the result on AHP analysis have to be implemented intensively. It is expected by the recovery or better environment capacity, that is mangrove then shrimp population will increase and makes chance to increase shrimp production by fishers. The most fifth actors that have crucial role on the declination of shrimp landings are government, community, stake holders, non-organizational government, and academics who must be simultaneously work together to run the strategy so can improve the weakness and threat, and also creates achievement on shrimp resources sustainability and the most is shrimp fishery business will be continued and gives benefit to all of parties who involved on shrimp fishery.
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Judul: Economic risk analysis of oil spill in the coastal waters of Cilacap: case study shrimp fisheries
Abstrak: Cilacap Regency is located at the Central Java has fisheries potential with high economic value and become a minapolitan area. The presence of Pertamina RU IV Cilacap at Cilacap Regency plays a significant role to economic contribution for public, both directly and indirectly. On the other hand, the activities Pertamina also create negative impacts from oil spill which has polluted the seat erritory of Cilacap:D uring period 2003-2011t,h erew ere four oil spills. Based on some researchest,h ose casesh ave impacted on the shrimp capture, effort and income of fishemren. Oil spill effects usually were not considered by decision maker and become environmental extemalities. In order to quantiff the impact, it is important to value of the economic lossed, the shrimp capture, effort decline in the area and the policy implication. The study aim to value of the economic loss impacted by oil spill using approach of bioeconomic model, producer surplus, and dynamic modeling. The result shows that the value of effort and shrimp capture decline of oil spill impact we 4.299 trip and 53,81 ton. Erconomic loss could also be seen from the decrease in at average of Rp. 98.991.990.000,0A0.s consequenceosf frnding,i ntegratedo il and gasp olicy and fisheryp olicy shouldb e directedf or the seam anagemenTt.h e integratedp olicies are economic risk assessmente, stablishmento f zoning, sign utilized of oil and gas,r estockinga reaa nd accountablec ompensationm echanism.
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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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