Judul: Rantai Pasok Benih Bening Lobster untuk Pengembangan Budidaya Lobster di Provinsi Lampung
Abstrak: Pengembangan budidaya lobster di Indonesia memerlukan informasi ketersediaan benih secara kontinu. Penelitian ini bertujuan menganalisis mekanisme rantai pasok, efisiensi rantai pasok dan peluang risiko rantai pasok benih bening lobster di Provinsi Lampung. Penelitian dilakukan melalui wawancara dan pengisian kuisioner dengan metode snowball. Analisis data menggunakan margin pemasaran, farmer’s share, nilai tambah, dan metode failure mode and effect analysis (FMEA). Hasil penelitian menunjukkan bahwa telah terbentuk rantai pasok benih yang melibatkan nelayan, pengepul kecil, dan pengepul besar. Pola aliran yang mengalir pada rantai pasok yaitu aliran produk yang mengalir dari hulu ke hilir, aliran harga yang mengalir dari hilir ke hulu, dan aliran informasi yang mengalir ke dua arah. Rantai pasok pada kegiatan usaha benih bening lobster berlangsung secara efisien melalui perhitungan marjin permasaran dan farmer’s share serta menguntungkan para pelaku rantai pasok melalui perhitungan nilai tambah. Peluang risiko yang memberikan dampak tertinggi berdasarkan analisis metode FMEA adalah ketersediaan benih hasil tangkapan., The development of lobster culture in Indonesia requires information on the availability of puerulus. This research aims to analyze the mechanism, efficiency, and risk opportunities of the supply chain of puerulus in Lampung Province. The research was conducted through interviews and filling out questionnaires with the snowball method. Data analysis used marketing margin, added value, and failure mode and effect analysis (FMEA) method. The research result showed that the supply chain of puerulus involves fishers, small collectors, and large collectors. The flow pattern in the supply chain is the product flow that flows from upstream to downstream, the price flow that flows from downstream to upstream, and the flow of information that flows from two directions. The supply chain in puerulus business activities takes place efficiently through the calculation of marketing margins and farmer's share and benefits the supply chain actors through the added value. The risk opportunity that has the highest impact on the analysis of the FMEA method is the availability of caught seeds.
Keyword: FMEA, Lobster culture, Puerulus, Supply chain

Judul: The Business Plan of Lobster Farming in BBL Basic in Lampung Province
Abstrak: Salah satu wilayah yang memiliki kelimpahan Benih Bening Lobster (BBL) adalah Kecamatan Krui, Kabupaten Pesisir Barat, Provinsi Lampung. Terbitnya Peraturan Menteri Kelautan dan Perikanan RI No.17 Tahun 2021 menjadi dorongan untuk meningkatkan kegiatan budidaya lobster di Indonesia dengan berbasis benih hasil tangkapan. Penelitian ini bertujuan menganalisis ketersediaan BBL di Krui sebagai suplai benih untuk kegiatan budidaya serta mengkaji perencanaan bisnis budidaya lobster berbasis BBL di Provinsi Lampung. Penelitian dilaksanakan dari Oktober-Desember 2021, meliputi pengumpulan data melalui kuesioner, wawancara, dan observasi lapangan di Kecamatan Krui, Lampung. Metode analisis data yang digunakan dalam penelitian ini terdiri dari analisis aspek nonfinansial dan aspek finansial yang dianalisis secara deskriptif dan kuantitatif dengan menggunakan kriteria kelayakan bisnis, serta analisis sensitivitas (switching value). Hasil penelitian menunjukkan bahwa jumlah tangkapan BBL di Krui sebesar 26.363.384 ekor/tahun. Bisnis budidaya lobster berbasis BBL hasil tangkapan merupakan bisnis yang prospektif, dilihat dari nilai kriteria investasi yang layak dengan nilai NPV Rp 6.599.748.437, Net B/C 4,02, tingkat IRR 32,67% dan tingkat pengembalian modal selama 4,40 tahun, One of the areas that has abundance of puerulus (BBL) is Krui District, Pesisir Barat Regency, Province of Lampung. The Regulation of The Ministry of Fisheries and Maritime Affairs of the Republic of Indonesia No.17 of 2021 has been released to increase lobster farming in Indonesia based on natural seeds. This study aims to analyze the availability of BBL in Krui as a seed supply for aquaculture activities and examine the planning of lobster farming business in BBL basic in Lampung Province. The research was conducted from October-December 2021, including data collection through questionnaires, interviews, and observations in Krui District, Lampung. The data analysis method used are analysis of nonfinancial aspects and financial aspects which are analyzed descriptively and quantitatively using business feasibility criteria and sensitivity analysis (switching value). The results showed that the number of BBL catched in Krui was 26.363.384 in a year. The lobster farming business was prospective to be conducted and has the value of investment criteria that exceed its ideal value by obtained a Net Present Value of Rp 6.599.748.437, a Net Benefit-Cost Ratio of 4,02, an Internal Rate of Return of 32,67%, and Payback Period of 4,40 years.
Keyword: business plan, lobster farming, puerulus, sensitivity

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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