Judul: Analysis of Catfish (Pangasius sp.) Farming Agribusiness System in Koto Mesjid Village Kampar Riau Regency
Abstrak: Ikan patin merupakan komoditas unggulan Indonesia dengan prospek bisnis yang berorientasi ekspor. Salah satu wilayah yang mengembangkan budidaya ikan patin di Pulau Sumatera adalah Desa Koto Mesjid Kecamatan XIII Koto Kampar yang merupakan kawasan minapolitan dengan produktivitas panen mencapai 40-50 ton/hari. Tujuan penelitian ini adalah menganalisis kegiatan budidaya ikan patin di Desa Koto Mesjid sebagai subsistem on farm terkait dengan subsistem hulu, subsistem hilir, dan subsistem pendukung. Penelitian ini menggunakan metode studi kasus melalui observasi langsung dan wawancara kepada pembudidaya, UMKM olahan patin, dan pedagang pemasar. Hasil menunjukan bahwa bisnis budidaya ikan patin di Desa Koto Mesjid terdiri dari dua tipe, yaitu produksi untuk ikan salai dengan ratio R/C 1,12 dan produksi untuk ikan konsumsi dengan ratio R/C 1,18. Bisnis ikan patin ini didukung oleh balai pembenihan, pakan mandiri, UMKM pengolahan, dan saluran pemasaran yang terus berkembang dan bertambah jumlahnya serta jasa layanan pendukung yang cukup lengkap tersedia. Peningkatan produksi ikan patin sejalan dengan peningkatan pakan mandiri (R2 = 0,72) dan penambahan jumlah RTP budidaya (R2 = 0,74). Hubungan antara subsistem hulu dan hilir dengan subsistem budidaya mampu meningkatkan volume produksi budidaya di kawasan tersebut., Catfish is Indonesia's leading commodity with export-oriented business prospects. One of the areas that develops catfish farming on the island of Sumatra is Koto Mesjid Village, XIII Koto Kampar District, which is a minapolitan area with harvest productivity reaching 40-50 tons / day. The purpose of this study was to analyze catfish farming activities in Koto Mesjid Village as an on-farm subsystem related to the upstream subsystem, downstream subsystem, and supporting subsystems. This research uses a case study method through direct observation and interviews with cultivators, MSME processed catfish, and marketers. The results showed that the catfish farming business in Koto Mesjid village consisted of two types, namely production for smoked fish with an ratio R/C of 1,12 and production for consumption fish with an ratio R/C of 1,18. The catfish business is supported by hatcheries, independent feed, processing MSMEs, and marketing channels that continue to grow and increase in number as well as fairly complete support services available. The increase in catfish production was in line with the increase in independent feed (R2 = 0,72) and the increase in the number of cultivated FHs (R2 = 0,74). The relationship between the upstream and downstream subsystems with the cultivation subsystem is able to increase the volume of cultivation production in the area.
Keyword: Business, catfish, Koto Mesjid Village, production

Judul: Hubungan Karakteristik Kewirausahaan dengan Keberhasilan Usaha Ikan Patin di Desa Koto Mesjid Kabupaten Kampar
Abstrak: Produksi budidaya perikanan air tawar di Kabupaten Kampar terbesar ketiga di Indonesia yang telah ditetapkan oleh Kementerian Kelautan dan Perikanan sebagai sentra ikan patin di Indonesia. Tujuan Penelitian ini adalah menganalisis dan mendeskripsikan karakteristik responden usaha ikan patin di Desa Koto Masjid, menganalisis hubungan karakteristik kewirausahaan dengan keberhasilan usahanya. Penentuan sampel pada penelitian ini menggunakan metode non probability sampling dengan teknik convenience. Karakteristik kewirausahaan pada responden adalah percaya diri, berani mengambil risiko, kepemimpinan, disiplin, kerja keras, inovatif, dan mandiri. Atribut keberhasilan usaha terlihat dari peningkatan omzet, peningkatan produksi, dan peningkatan keuntungan. Alat analisis yang digunakan adalah korelasi Rank Spearman. Hasil analisis menunjukkan bahwa seluruh karakteristik kewirausahaan berkorelasi positif dengan keberhasilan usaha., The production of freshwater aquaculture in Kampar Regency is the third largest in Indonesia which has been designated by the Ministry of Maritime Affairs and Fisheries as the center of catfish in Indonesia. The purpose of this study was to analyze and describe the characteristics of the catfish business in Koto Mesjid Village, to analyze the characteristics of entrepreneurship with success. Determination of the sample in this study using a non-probability sampling method with a convenience technique. The entrepreneurial characteristics of the respondents are self-confidence, dare to take risks, leadership, discipline, hard work, innovative, and independent. Attributes of business success can be seen from increased turnover, increased production, and increased profits. The analytical tool used is Spearman Rank correlation. The results of the analysis show that all entrepreneurial characteristics are positively correlated with business success. Keywords: Business Success Performance, Entrepreneurial Characteristic, Kampar Regency, Koto Mesjid Village
Keyword: Business Success Performance, Entrepreneurial Characteristic, Kampar Regency, Koto Mesjid Village

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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