Judul: Studi daerah penangkapan ikan dan pola musim penangkapan ikan pelagis di Perairan Utara Aceh
Abstrak: Perairan Utara Aceh kaya sumberdaya alam hayati tetapi belum dimanfaatkan secara optimal serta daerah penangkapan ikan belum didata dengan baik. Pelabuhan perikanan pantai (PPP) Lampulo merupakan satu-satunya pelabuhan perikanan tipe C yang berada di kota Banda Aceh. Penelitian dilakukan untuk menduga daerah penangkapan ikan dan pola musim penangkapan ikan pelagis. Analisis data dilakukan dengan menghitung produktivitas perairan (CPUE) dan menduga pola musim penangkapan ikan dengan metode moving average. Hasil analisis diperoleh bahwa perairan Sabang potensial untuk usaha penangkapan ikan layaran, tongkol, selar dan tenggiri. Perairan Aceh potensial untuk usaha penangkapan ikan layaran, tongkol, selar, tenggiri, dan tuna. Perairan Lhoknga potensial untuk usaha penangkapan ikan tongkol dan selar. Perairan Leupung potensial untuk usaha penangkapan ikan layaran, tongkol, selar, tenggiri, dan tuna. Puncak musim penangkapan terdapat pada bulan September-November, dan paceklik terjadi pada bulan Desember-Februari.
Keyword: Northern Aceh Waters, Fishing ground, Pelagic fish, Peak fishing season

Judul: Strategi pengembangan usaha perikanan pelagis kecil di Perairan Utara Provinsi Aceh
Abstrak: Small pelagic fish represent fishery resources which are at most laboured by coastal communities because easy to cacth and big potency, inclusive in north territorial water of Aceh . PPN Lampulo is a main location of small pelagic fishery activities in Banda Aceh City and Province of Provinsi Aceh. This location is very strategic to open a catching fishery effort because near with the downtown, especially fish market so the fishers who also need daily necessary equipments won’t cost big amount of money. This research aim to analyze maximum sustainable yield (MSY) of small pelagic resources, to analyze financial feasibility of small pelagic fisheries effort, to determine small pelagic fishing units according technical aspect, serfaireble aspect, and the continueing, and to formulate development strategy of small pelagic fisheries effort. The method of research are standard analysis of fishing unit, biological aspect analysis, financial analysis (NPV, IRR, and B/C Ratio), scoring analysis, and hierarchy analysis. Maximum sustainable yield (MSY) of small pelagic resources in north territorial water of Aceh are estimated 15479 tons per year and F-optimum are 4896 trips. If compared by a annual production (7069,35 ton), hence the utilization of small pelagic resources about 45,67 %, so this condition gives development opportunities in the future. From nine type of fishing unit to catch small pelagic fish in north territorial water of Aceh, there are four chosen as sustainable fishing units according technical aspect, biological aspect, and the sutainable aspect. They are drift gillnet (VA = 2,927), purse seine (VA = 2,575), payang (VA = 1,657), and beach seine (VA = 1,319). Gillnet, purse seine, boat seine, beach seine are feasible to develop in the location, because have NPV > 0, IRR > 6,25 %, and B/C ratio > 1. Strategy priority to develop small pelagic fisheries effort in north territorial water of Aceh, re-management of small pelagic fishing bussness are : empawerment of human resources ( RK = 0,214, II = 0,05), sequerly ( RK = 0,196, II = 0,05), development of fishing technology precisely (RK = 0,180, II = 0,05), development of skim credit to fisheries effort (RK = 0,145, II = 0,05), and development of exploitation and restocking zone (RK = 0,137, II = 0,05), and repair of management system of re-management of fisheries infrastructure system ( RK = 0,126, II = 0,05). As first priority, construction strategy of human resources being of stable to intervention of fishermen and government.
Keyword: Fisheries, Aceh, Fisheries infrastructure system

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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