Judul: Sustainable management of capture fishery in Jakarta Waters, DKI Jakarta Province
Abstrak: Jakarta Waters is categorized as fully exploited water areas which its coastal areas accommodate multifunction services. Therefore, it needs precautionary approach to manage fisheries activity and its resource in the location. This is important to sustain the potential resource, provide prosperity to fishermen as well as coastal communities. The general objectives of this study are to arrange the sustainable fishery management in Jakarta Waters, while specific objectives of this study are to evaluate capture fishery management status; to determine optimum allocation of potential fishing gears and fisheries development areas based on potential fishing gears; to analyze the various components affecting to capture fishery activity based on suitable area and to analyze internal and external conditions in order to arrange the strategies for sustainable fishery management in Jakarta Waters. The methods used in this study were system approach, SWOT analysis, Linear Goal Programming (LGP) analysis, analysis of Location Quotients (LQ), Geographic Information System (GIS) analysis, and Analytical Hierarchy Process (AHP) method. The results revealed that the management of capture fishery in Jakarta Waters was categorized as "kurang baik" with the total scores of 2.529 and 2.747 for internal and external factors analysis, matrix IE pointed out that the position of fishery management at growth level which need strategy to do coordination horizontally with the other stakeholders. By using GIS analysis, it was identified that 52,89% of Jakarta Waters can be used for capture fishery, less than 25% can be used for fish farming (cage culture) and less than 15% can be used for seeweed culture. Meanwhile the potential fishing gears to be developed were pelagic danish seine, drift gillnet, boat lift net, set bottom long line, portable trap and muro ami which have the optimum allocation for each fishing gear; 7 units, 98 units, 23 units, 18 units, 8547 units, and 798 units. The potential fishing gears for pelagic danish seine could be developed in Penjaringan and North Seribu Island Districts; drift gillnet could be developed in Cilincing District; boat lift net could be developed in Penjaringan District; set bottom long line could be developed in Penjaringan District; portable trap could be developed in Cilincing and South Seribu Island Districts while muro ami could be developed in Penjaringan and South Seribu Island Districts. The study identified that there are several important strategies to support sustainable capture fishery management, from the first priority to the last are small-scale fishery standardization, integrated management to conserve the ecosystem function, quality product improvement, fishing days opreration management by implementing closed – open seasons, increasing independent fishermen capability, human resources empowerment, extention for fishermen and increasing capture fishery activities supervision. As the first priority, the standardization of small-scale fishery should be stable against changes in the dimension of biology and quite stable against changes in the ecological, economic, social and technological dimension.
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Judul: Kebijakan Pengembangan Ekonomi Perikanan Tangkap Berkelanjutan di Provinsi DKI Jakarta
Abstrak: Capture fisheries subsector in DKI Jakarta Province has been facing serious problems on various dimensions. Those problems threat its sustainability in the future. Fisheries sustainability is determined by several interacting dimensions such ecology, economic, social. technology and institution. The purpose of this research is to 1) estimate optimum alocation of capture fisheries in DKI Jakarta Province, 2) determine the degradation and depreciation level of capture fisheries in DKI Jakarta, 3) determine the sustainability status of capture fisheries in DKI Jakarta according five sustainability dimensions (ecology, economy, social, technology, and institution), 4) determine dynamic optimation management of capture fisheries in DKI Jakarta Province, and 5) formulate policy direction of economic development of sustainable capture fisheries in DKI Jakarta Province. The fisheries resources on this research seperated as pelagic and demersal. The research used bioeconomic analysis, degradation and depreciation analysis, sustainable analysis with Rapfish techniques and dynamic analysis. Result of the bioeconomic analysis showed that the harvest and effort of pelagic and demersal resources were above than optimal level therefore those resources have been over exploited. Degradation and depreciation analysis showed that pelagis resouce have been degraded dan depreciated meanwhile demersal resource have been not degraded dan depreciated. Sustainable analysis with Rapfish techniques using multi dimension scalling (MDS) and modification of AHP showed that the sustainability index of pelagic was 39,63. Based on categorized, it means was in less sustainable with economic dimension as the most priority dimension that influently to sustainability of pelagis resources. Mean while, the sustainability index of demersal resources was 37,15. It means the resource was less sustainable with ecology dimension as the most priority dimension. The dynamic model of this research was composed of three sub models, such as ecology, economic and social. Those sub models were used to predict of sustainability indicators on each dimension. The indicator of ecology, economic and social model were natural stock of resources, profit and profit to UMR. Result of dynamic analysis showed that limiting number of fishing effort can kept the natural stock of fish on sustainable stock. Based on result of all analysis, one of the best policy to improve sustainability of capture fisheries in DKI Jakarta is synergetic policy which consider ecology, economic, and social indicators.
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Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa