Judul: Development of Sustainable Giob Fisheries in Kayoa, South Halmahera
Abstrak: Giob fishery is one of the major fisheries in Kayoa, South Halmahera Regency, requires various aspects related studies. This study aims to formulate alternative development strategies of giob fisheries sustainability. Data collection was conducted from November 2011 to October 2012. The analysis includes: giob fishing conditions, biology of halfbeak fish (Hemiramphus sp.), giob fisheries technical evaluation, giob fisheries sustainability, and sustainable development of giob fisheries. This study showed that halfbeak females experienced two phases of the gonads mature season i.e. in January-March and September-November. The food composition of the fish consisted of phytoplankton (52.80%), debris (31.36%), crustaceans (12.04%), zooplankton (3.73%), and fish scales (0,08%).The natural mortality rate (M) was 0.78 per year, greater than rate of fishing mortality (F) of 1.48 per year, the exploitation rate (E) of 0.65 per year. Technical factors of giob production that have a significant influence was fuel price. In term of financial analysis, the giop vessel size of 10.5 GT benefit better than the size of 4.5 and 15 GT. The parameter of NPV, IRR, B/C ratio, ROI for the vessel of 10.5 GT was Rp 72,795,666; 7.02%, 1.04; 7.80, respectively. This study suggest that priority sequence of development strategies of sustainable giob fisheries in study area (with interest ratio) are: 1) monitoring of exploitation of halfbeak fish resources (0.421); 2) conduct a capacity building program for the giob fishermen ( 0.226); 3) technological innovation of giop fishing gear (0.222); 4) to establish a cooperative management (co-management) for giop fisheries (0.180), and 5) cacth optimum of halfbeak fish (0.132).
Keyword: giob fisheries, halfbeak fish (Hemiramphus sp.), sustainable development strategy

Judul: Development of Pelagic Fishing Unit in South Bangka Regency
Abstrak: The fishery condition in South Bangka Regency still has some limitation, among others are the capacity and unattainability of fishing ships, low fishermen knowledge in the modern fishing technology, and capability of local fishermen to fish in a long period is limited, so that they tend to use fishing gear that only sufficient to use a long the shore.Another fact proved that in general fish resource utilization is still carried out using stationary fishing net i.e. bottom gillnet and hand line so that the fishery potency especially pelagic fish is not optimized. The objectives of the research are first to carried out a selection on fishing unit based on, biology, economy, and social aspects, secondly to look for optimum pelagic fishing allocation in the South Bangka Regency and third to determine the strategy for the development of pelagic fishery in South Bangka Regency. The methodology being used were survey and observation on the pelagic fishery condition at the research location. Data was obtained through direct interview with the pelagic fishery fishermen based on the fishings gears they used. Interviews were also carried out with the fishery stakeholders and collectors i.e. PPI Sadai and local fishery ageny officers. The dominant fishing gears used by the fishermen were line fishing, stationary life net, and gillnet. A new fishing gear that was the millenium net that was introduced by Andon fishermen from Indramayu Regency. Based on the financial criteria analysis the stationary life net has the bighest R/C value compared to other fishing gears. Therefore, it is expected that stationary life net will develop rapidly. However, looking into the investment criteria the stationary life net has low B/C value compared to boat life net. In this regard, both fishing gears could be considered to be developed in South Bangka Regency. The analysis of the four (4) aspects i.e. biology, technical, economy, social presented that in sequence the unit that has good prospect to be developed are millennium net boatlife net, line fishing, stationary life net, and gillnet. To have optimum utilization of existing pelagic fish resource a strategy was prepared based on the resource characteristic and local community. The first strategy is fish resource utilization using environment friendly fishing gear and second improved productivity and value added of pelagic fish. The formulated strategy could be taken as a reference by the South Bangka Regency Local Government to decide the policy and program in the development of the pelagic fish in this area using the fishing principle that are accountable and environment friendly, beside that the program should be able to overcome the problem arouse in the community to reach higher fishermen productivity and welfare.
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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