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: Potential Development of Lobster Cultivation  Based on Seed Availability in Ujung Genteng, Sukabumi, West Java
Abstrak: Lobster merupakan salah satu komoditas perikanan laut yang penting dan menjadi perdagangan global yang ekstensif. Potensi benih lobster di perairan Indonesia sangat besar. Vietnam merupakan salah satu negara tujuan ekspor benih bening lobster. Terbitnya PERMEN Nomor 16 tahun 2022 menyebutkan bahwa penangkapan benih lobster hanya dapat dilakukan untuk pembudidayaan di wilayah Indonesia. Indonesia belum memanfaatkan potensi perairan untuk pengembangan budidaya lobster terutama di Kepulauan Seribu. Permasalahan dalam penelitian ini yaitu belum adanya data potensi pengembangan budidaya lobster berdasarkan ketersediaan benih di Indonesia, termasuk bagaimana strategi pengembangan usahanya. Penelitian ini bertujuan menghitung potensi ketersediaan benih bening lobster di Ujung Genteng untuk budidaya pembesaran lobster dan analisis strategi budidaya lobster. Data yang diperoleh baik data primer dan data sekunder akan dianalisis menggunakan analisis SWOT. Ketersediaan benih bening lobster di Desa Ujung Genteng yaitu 18.400.000 ekor pada bulan Oktober-November 2021. Strategi yang digunakan meningkatkan aktivitas budidaya lobster untuk menyerap ketersediaan benih bening lobster dengan memanfaatkan area yang sesuai dan menerapkan teknologi yang tepat sehingga produksi dan produktivitas usaha meningkat serta memperluas target pasar lobster konsumsi baik pada tingkat nasional maupun global dengan meningkatkan daya saing produk, Lobster is one of the important marine fishery commodities and has become an extensive global trade. Indonesian waters have a huge potential in lobster seeds. Vietnam is one of the destination countries for lobster seed exports. Regulation issuance from the Ministry of Maritime Affair and Fisheries (PERMEN) Number 16 of 2022 states that catching lobster seeds can only be done for cultivation in Indonesian territory. Indonesia has not utilized the potential of the waters for the development of lobster farming, especially in the Kepulauan Seribu. The problem in this research is that there is no data on the potential development of lobster cultivation based on the availability of seeds in Indonesia, including the business development strategy. This study aims to calculate the potential availability of lobster seeds in Ujung Genteng for growing lobster cultivation and analyze lobster cultivatuion strategies. The data obtained bot h primary data and secondary data will be analyzed using SWOT analysis. The availability of clear lobster seeds in Ujung Genteng Village is 18.400.000 in October-November 2021. The strategy used is to increased lobster cultivation activities to absorb the availability of clear lobster seeds by utilizing suitable areas and applying the right technology so that production is reduced and increased business productivity and expanded the target market for consumption lobster both at the national and global levels by increasing product competitiveness
Keyword: Business strategy, Clear Lobster seeds, Kepulauan Seribu, Ujung  Genteng, Puerulus

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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