Judul: Pengelolaan Sumberdaya Pulau Lingayan Untuk Pengembangan Budidaya Rumput Laut dan Ikan Kerapu
Abstrak: This research was done in Lingayan island. The aims of this research are; (1) to identify the environmental resources potencies for enhance seaweeds culture and grouper culture; (2) To analyse economic visibility effort in enhancing seaweeds and grouper in Lingayan island; and (3) develop seaweed culture and groupers culture strategy in Lingayan Island. The research used Geografis Information System Analysis, Visibility study, SWOT analysis and QSPM. The potencies of environment resources in Lingayan Island for seaweeds culture was 786,5 ha and to grouper culture was 119,2 ha. For seaweed culture, with capacity per unit is about 9.166 units, and groupers culture is about 4.985 units. Cashflow of activities of seaweed cultures analysed by R/C 2.13 and groupers cultures by R/C: 1.23; NPV: Rp.9.870.509; Net B/C: 1.07 dan IRR: 22.81%. The primary strategies of management are: (1) to facilitate a seeds supply to support seaweeds culture and groupers cultures development, (2) to facilitate the local community achievement of enhancing marine culture activity as a primary livelihood sustainable activity, (3) to facilitate local community in a fishers group and include training programs, (4) to facilitate capital adequacy effort for marine culture, (5) community empowerment and to enhancing economy of community at Lingayan island with encreasing of productivity and quality marine culture product, (6) to facilitate opening of broader market of which can be accessed by local community, (7) Build spatial planning for marine culture zone in Lingayan island.
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Judul: Strategi Pengelolaan Sumberdaya Perikanan Karang untuk Pemanfaatan yang Berkelanjutan (Kasus: Kepulauan Ayau, Kabupaten Raja Ampat, Provinsi Irian Jaya Barat)
Abstrak: Indonesia failure to get property rights to Sipadan and Ligitan Island represent worth experience about importance of development policy to increase the social welfare in boundries island. Potency consideration and regional specific characteristics is properly placed forward in stimulating of development policy. Ayau Archipelago is one of boundry island in Raja Ampat Regency owning big enough reef fishery potency. Research objective were designed as the strategy of reef fishery resources management for sustainability exploitation in Ayau archipelago, Raja Ampat Regency. SWOT analysis is used to evaluate sustainability of management activities. The sustainability index shows 0,98 which mean reef fishery management activities was unsustain. There were some strategies to anticipate the condition; (1) friendly reef fishery management, (2) optimalization of reef fish potency, (3) development of business system, (4) development of PIR system in business ,(5) development of institution, (6) infrastructure repair of commerce and communication, (7) modernization and motorization of fishing unit, and (8) resource management base on society.
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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