Judul: Rancang bangun model berbasis agen untuk pengembangan agroindustri udang di kawasan minapolitan
Abstrak: Agroindustry is a very important component in the agricultural supply chain. Shrimp agroindustry is an industry that can add value to the shrimp commodity. Since it has a strategic position in the agricultural supply chain, this industry need to be maintained its sustainability. The sustainability of shrimp agroindustry depends on the conditions of shrimp supply. If raw material supply increases, it will positively impact on the sustainability of shrimp commodity. On the contrary, a decrease in shrimp production resulted in disruption of the supply of raw materials and, in turn, damaging the sustainability of shrimp agroindustry. One attempt to increase shrimp production is the development of Minapolitan program. Minapolitan can be considered as an effort to implement fair and sustainable economic development through rural development focusing on fisheries as a cluster developing point. However, the development of Minapolitan zone has not had significant positive impact. Current fisheries production is stagnant and declining due to various things such as disease, unfavorable climatic conditions, cultivation management, quality seeds, and others. There are many elements that should be accommodated in the development of Minapolitan leading to the complexity and the social dynamic of this program. Agent-based model approach in the development of Minapolitan for sustainable shrimp agroindustry will provide simulation model for the sustainability of shrimp agroindustry. This simulation model was constructed from interaction between each autonomous agent within a cluster. The agent-based approach was started from identifying types of agents within Minapolitan cluster of shrimp agroindustry, the agent’s behaviour, the interaction between agents, the agreements among agents, and the interaction between agents and the environment. The next step was constructing a cluster model based on the principles of sustainability. The simulation model resulted from this study is not only able to determine the sustainability, but also is able to simulate policy scenarios to predict changes in the interaction among agents and the impact of the changes to the sustainability of shrimp agroindustry. The analytical ability and the policy scenario simulation will be useful for decision makers in formulating strategy of shrimp agroindustry sustainability in Minapolitan cluster’s. To increase the level of sustainability of shrimp agroindustry, a simulation of scenarios related to the activity of agents in Minapolitan has been done. The scenarios have been changed focusing on the efforts related to the activities of farmers in increasing the production of shrimp. The increase of shrimp production is very important because the activity in the Minapolitan cluster is closely related to the volume of shrimp production. In summary, the development of shrimp agroindustry cluster model has been designed to predict the sustainability of Minapolitan area by conducting some simulations that may occur in the real system. The results of simulation model shows that the current Minapolitan program can be considered sustainable. Farmer’s behavioural changes in choosing shrimp seeds, in optimizing fishpond area, and in improving aquaculture managerial skill could increase the production of shrimp and the profit. Improving the management of post-harvested shrimp conducted by middleman could also increase the percentage of the product purchased by agroindustrial companies in the Minapolitan zone.
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Judul: Model Integrasi dalam Pengembangan Minapolitan Perikanan Tangkap di Palabuhanratu, Kabupaten Sukabumi, Jawa Barat
Abstrak: Palabuhanratu Archipelagic Fishing Port has been established as the field project of capture fisheries minapolitan. Minapolitan development will be effective if managed in an integrated model. This research was aimed to: 1) identify the implementation problems, 2) formulate the integrated model based on market integration, supply chain and institutional partnerships, 3) formulate strategies and benchmarks of the integrated model in developing capture fisheries minapolitan at Palabuhanratu. System approach, descriptive analysis, SWOT and balanced scorecard were used for data analysis. The result found that the implementation problems of capture fisheries minapolitan at Palabuhanratu were fishermen poverty, declined in fish stocks, and conflicts in the utilization of coastal and marine areas. Tuna and hairtail market at Palabuhanratu were highly integrated for both local and export markets. The vertical integration process occurred among fishermen, vessel owners, and the company. The integration of minapolitan institutional can be done through participation in a harmonious and mutual need between government, private sector, and intellectual. Strategies for the successfull implementations in the minapolitan model were 1) optimization of tuna and hairtail product, 2) improving facilities and infrastructure of transportation and fishing port, 3) cooperation of minapolitan business partnerships, 4) improving performance of fishing port institutional, 5) the fisheries industrialization, 6) sustainable fisheries development, 7) building win-win partnerships between fisherman, vessel owners and exporter, 8) building a collective consciousness to remain committed and consistent in developing minapolitan. Balanced scorecard analysis produced 16 successfull factors (benchmarks) and 13 programs that should be done to achieve strategic goals.
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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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