Judul: Tingkat Kesejahteraan Nelayan Purse Seine di PPI Pasongsongan Sumenep.
Abstrak: Nelayan di Pangkalan Pendaratan Ikan (PPI) Pasongsongan menggunakan Purse seine untuk melakukan usaha penangkapan ikan. Semakin banyak hasil tangkapan yang didapat, maka semakin meningkat pula pendapatan yang diterima dan kesejahteraan nelayan pun ikut meningkat. Penelitian ini bertujuan untuk mengidentifikasi tingkat kesejahteraan nelayan Purse seine di PPI Pasongsongan Sumenep, Jawa Timur. Metode yang digunakan adalah metode deskriptif dengan jenis penelitian survey. Teknik pengumpulan data dilakukan dengan cara wawancara dilengkapi dengan kuesioner, serta pengambilan sampel menggunakan metode purposive sampling. Analisis data menggunakan 11 indikator kemiskinan yang menggabungkan dari indikator kemiskinan menurut indikator kesejahteraan rakyat, indikator kemiskinan menurut Sajogyo, serta indikator kemiskinan menurut Direktorat Jenderal Tata Guna Tanah serta analisis SWOT. Hasil penelitian menunjukan bahwa tingkat kesejahteraan nelayan Purse seine tergolong kriteria tidak miskin. Terkait strategi yang tepat dalam peningkatan pendapatan nelayan Purse seine di PPI Pasongsongan Sumenep adalah pengembangan usaha perikanan Purse seine, perluasan akses permodalan, peningkatan sarana keselamatan pada armada, dan pengembangan akses pemasaran.
Keyword: indikator kemiskinan, PPI Pasongsongan, Purse seine, tingkat kesejahteraan nelayan

Judul: Keragaan Perikanan Purse Seine di PPI Muara Angke, Jakarta Utara
Abstrak: PPI Muara Angke is one of the fisheries landing sites which is located in DKI Jakarta. Fishing gear that is often used in PPI Muara Angke is purse seine. The aim of this study was to analyze the technical, biological, social and economic aspects of purse seine fishery in PPI Muara Angke. The method of this research was a survey method by analyze each aspects descriptively. Technically, purse seiner in PPI Muara Angke have size 25-125 GT and operate in the North region of the Java Sea, Bangka Belitung, Karimata Strait, Natuna Sea, South region of the China Sea and the others. The number of fisherman is 30-40 people. Biologically, the fishing gear has high catch species diversity with a low selectivity. Socially, purse seine fisheries in PPI Muara Angke implement sharing system, money deposits and wages catch bait. It is can also be well received by the local community. Economically, purse seine fisheries in PPI Muara Angke gain huge profits and having a good investment prospecting.
Keyword: purse seine, survey method, Muara Angke

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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