Judul: Business Manajemen of Small-Scale Gillnet Fisheries in Palembang City
Abstrak: Secara umum, produksi perikanan tangkap di Provinsi Sumatera Selatan berfluktuasi setiap tahunnya, namun untuk Kota Palembang produksinya cenderung mengalami penurunan dalam beberapa tahun terakhir ini. Hal tersebut diduga usaha nelayan di Kota Palembang dalam kondisi merugi, yang akhirnya akan berdampak pada tingkat kesejahteraan nelayannya. Tujuan penelitian ini untuk mendeskripsikan karakteristik usaha perikanan gillnet skala kecil di Kota Palembang, menganalisis finansial usaha perikanan gillnet skala kecil di Kota Palembang, dan merumuskan strategi manajemen usaha perikanan gillnet skala kecil di Kota Palembang. Metode yang digunakan dalam penelitian ini adalah metode survei dengan menggunakan pendekatan analisis deskriptif, analisis finansial, dan analisis SWOT. Hasil Penelitian menunjukkan bahwa ukuran armada kapal gillnet di Kota Palembang cukup beragam, yakni 16 GT, 17 GT, 18 GT, 20 GT, 25 GT, 27 GT, 28 GT dan 29 GT. Sistem bagi hasil yang diterapkan nelayan gillnet Kota Palembang yaitu 50 : 50, untuk pemilik menerima 50% sedangkan untuk nakhoda dan ABK menerima 50%. Usaha penangkapan ikan menggunakan gillnet di Kota Palembang ternyata masih mendapatkan keuntungan sebesar Rp 1.325.000.000 per tahun dengan R/C rasio sebesar 2,59, sehingga dapat dinyatakan layak usaha. Strategi diperlukan untuk mengembangkan perikanan gillnet yang berkelanjutan di masa mendatang diantaranya adalah efisiensi armada perikanan gillnet, memperluas jangkauan daerah penangkapan ikan, menyediakan sumber permodalan atau akses perbankan, dan peningkatan fasilitas tempat pendaratan., In general, fisheries production in South Sumatra Province fluctuates every year, but in Palembang City, production tends to decrease in recent years. It is suspected that the fishing business in Palembang City is in a state of loss, which will ultimately impact the welfare of the fisher. The purpose of this study was to describe the characteristics of small-scale gillnet fisheries in Palembang City, analyze the financials of small-scale gillnet fisheries in Palembang City, and formulate a management strategy for small-scale gillnet fisheries in Palembang City. The method used in this research is a survey method using a descriptive analysis approach, financial analysis, and SWOT analysis. The results show that the size of the gillnet fleet in Palembang City is quite diverse, namely 16 GT, 17 GT, 18 GT, 20 GT, 25 GT, 27 GT, 28 GT and 29 GT. The profit-sharing system applied by gillnet fisher in Palembang City is 50: 50, for owners to receive 50% while for skippers and crew members receive 50%. The fishing business using gillnets in the city of Palembang is still getting a profit of Rp. 1,325,000,000 per year with an R/C ratio of 2.59, so the business is feasible. Then, several strategies are needed to develop sustainable gillnet fisheries in the future, including gillnet fisheries’ efficiency, expanding fishing ground, providing sources of capital or banking access, and improving landing site facilities.
Keyword: fishery business, gillnet, management strategy, Palembang, small scale

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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