Judul: Peranan sektor perikanan dalam pengembangan wilayah Kabupaten Belitung
Abstrak: Fisheries sector is expected to be a strategic sector for regional development in Regency of Belitung in the future, based on its natural resources. The purposes of this study are: (1) identifying the existing and potential of fisheries sector, (2) identifying the role of the fisheries sector in development, (3) identifying the fisheries sector linkages with other sectors in regional development system, (4) exploring the perceptions of stakeholders regarding fisheries development priorities, and (5) formulating the guidelines of fisheries sector development. This research was conducted in the Regency of Belitung, Province of Bangka Belitung Islands, using primary and secondary data. The analyses used are descriptive analysis, Input-Output (IO), and Hierarcy Analytical Process (AHP). The results showed that fisheries production reaches 41,947.10 tons/year and still be able to be increased up to 85,252.90 tons/year. Fisheries sector contributed the highest in gross regional domestic product (GDP) up to 18.07%. However, it has a low linkages with other sectors. Main activities in fisheries development are fishing, aquaculture and processing. Fisheries development policies directed to increase the amount of production, and enhance the role and linkages of the fisheries sector with other sectors.
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Judul: Fisheries Subsector Analysis in Indramayu Regency Regional Development.
Abstrak: Indramayu Regency has a great potential in renewable fisheries. It is expected that this fisheries subsector continues to grow and become a strategic subsector in Indramayu regional development. The objectives of this research were: (1) to identify the role of the fisheries subsector in the economy of the region and its links with other sectors in Indramayu regency, (2) to learn about the level of development of the regional development of fisheries subsector in Indramayu Regency based on the conditions of facilities and infrastructure, and (3) to find out the perception of stakeholders in determining development priorities for the fisheries subsector as well as to formulate a strategic direction in the development of the fisheries subsector in Indramayu regency. The analysis methods used were of Input-Output (I-O) analysis, hierarchical analysis of regional development (Skalogram Method), Analytic Hierarchy Process (AHP), and the combination of AHP and SWOT analysis (A'WOT). Based on the analysis, the fisheries subsector had a relatively low sectoral relationship. The result of direct forward linkage (DFLi), direct backward linkage (DBLj), Index deployment value (backward linkages effect ratio) and degree of sensitivity index value (forward linkages effect ratio) were below average. The result of multiplier effect output of fisheries, multiplier effect of fisheries gross value added, and multiplier effect of fisheries were revenue relatively low compared to other sectors. The fisheries subsector has the potential to be developed through enhancing linkages between sectors with industry excluding oil/gas sector and wholesale and retail trade sector. Schallogram analysis showed that the districts on hierarchy III were considered feasible to do the development since they were supported by the number of Farmer Households of culture amounting to 2,952 people (68%) of the total 4,344 people and 26,936 Fishermen Households (72%) of the total 37,425 people residing in the coastal area with the value of Human Development Index under 70. The districts in hierarchy III are the districts of Krangkeng, Juntinyuat, Cantigi, Pasekan, Kandanghaur and Patrol. According to the stakeholders, the priority of fisheries subsector development in Indramayu Regency was the development of aquaculture activities (42.04%) in terms of improving the quality of human resources (33.66%). In the development strategy of the fisheries subsector of aquaculture activities in Indramayu regency, priorities should be in the development of existing resources (Natural Resources, Human Resources, Artificial Resource/Infrastructure, Institutional, Technology and Capital) to achieve sustainable development.
Keyword: fisheries subsector, Indramayu Regency, regional development

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