Judul: Supply Chain Analysis of Betta sp. At Betta Aquaculture Group (KPC) Lebak Oca Mandiri Semplak Bogor
Abstrak: Rata-rata produksi ikan cupang di KPC Lebak Oca Mandiri akibat adanya pandemi mencapai 1000 ekor ikan cupang perbulan pada tahun 2019 sampai saat ini, sedangkan sebelumnya pada tahun 2018 hanya 500 ekor ikan cupang perbulan yang diproduksi. Pemenuhan permintaan terhadap ikan cupang tidak lepas dari sistem rantai pasok. Penelitian ini bertujuan menganalisis proses, jejaring, pelaku, efisiensi dan peluang risiko yang terdapat pada rantai pasok ikan cupang. Data diperoleh dengan metode studi kasus. Analisis data menggunakan margin pemasaran, farmer’s share, dan metode failure mode and effect analysis (FMEA). Hasil penelitian menunjukkan bahwa proses produksi ikan cupang terdiri dari pemijahan induk, pemeliharaan larva, pembesaran, dan pemasaran. Aliran informasi yang mengalir pada rantai pasok yaitu mengalir secara dua arah, aliran barang yang mengalir dari hulu ke hilir, dan aliran harga yang mengalir dari hulu ke hilir. Pelaku rantai pasok ikan cupang di KPC Lebak Oca Mandiri terdiri dari pembudidaya, pedagang kecil 1, pedagang kecil 2, pedagang besar 1, pedagang besar 2, eksportir, dan konsumen akhir. Rantai pasok ikan cupang yang terjadi dari pembudidaya menuju ke pedagang kecil 1 merupakan rantai pasok yang paling efisien. Penyakit pada kegiatan budidaya ikan cupang merupakan peluang risiko yang memberikan dampak tertinggi., The average production of betta fish at KPC Lebak Oca Mandiri due to the pandemic has reached 1,000 betta fish per month in 2019 until now, whereas previously in 2018 only 500 betta fish were produced per month. Meeting the demand for betta fish cannot be separated from the supply chain system. This study aims to analyze the processes, networks, actors, efficiency and risks contained in the betta fish supply chain. Data obtained by case study method. Data analysis uses marketing margins, farmer's share, and the failure mode and effect analysis (FMEA) method. The results showed that the betta fish production process consisted of brood spawning, larval rearing, rearing, and marketing. The flow of information that flows in the supply chain is flowing in two directions, the flow of goods that flows from upstream to downstream, and the flow of prices that flows from upstream to downstream. Betta fish supply chain actors at KPC Lebak Oca Mandiri consist of cultivators, small traders 1, small traders 2, wholesalers 1, wholesalers 2, traders and end consumers. The supply chain for betta fish that occurs from cultivators to small traders 1 is the most efficient supply chain. Disease in betta fish cultivation is a risk opportunity that has the highest impact at KPC Lebak Oca Mandiri.
Keyword: aquaculture, betta fish, marketing margin, supply chain

Judul: Supply Chain Efficiency Analysis of Japanese Koi Fish (Cyprinus rubrofuscus) in PT. Solaris Koi Indonesia
Abstrak: Volume impor ikan koi ke Indonesia yang lebih tinggi dari volume ekspornya berimbas pada harga ikan yang berfluktuasi, sehingga perlu adanya informasi rantai pasok jenis dan grade ikan koi yang memberikan efisiensi tertinggi dengan risiko terendah. Penelitian ini bertujuan untuk menganalisis proses, jejaring, pelaku, efisiensi, dan peluang risiko yang terdapat pada rantai pasok ikan koi asal Jepang di PT. Solaris Koi Indonesia. Pengumpulan data dilakukan dengan pengamatan langsung dan wawancara dengan metode studi kasus. Analisis data menggunakan marjin pemasaran, farmer’s share, dan metode failure mode and effect analysis (FMEA). Proses produksi ikan koi di PT. Solaris Koi Indonesia sesuai dengan SNI 7734:2011 dan karantina ikan sesuai formulir Cara Karantina Ikan yang Baik (CKIB). Rantai pasok terdiri dari 20 saluran grade A, 7 saluran grade B, dan 4 saluran grade C yang dijalankan oleh pihak pembudidaya, dealer, dealer kropyokan, dan konsumen akhir. Aliran informasi mengalir secara dua arah, sedangkan aliran harga dan produk mengalir satu arah dari hulu ke hilir. Saluran A Shusui 2, A Asagi 2, dan A Showa 1 merupakan saluran paling efisien dengan tahapan yang pendek. Variabel risiko yang berkaitan dengan harga memberikan dampak tertinggi berdasarkan analisis FMEA., The volume of koi fish imports to Indonesia is higher than the volume of exports, resulting in fluctuating fish prices, so it is necessary to know the koi fish supply chains that provide the highest efficiency with the lowest risk. This study aims to analyze the processes, networks, actors, efficiency, and risk opportunities in the Japanese koi fish supply chain at PT Solaris Koi Indonesia. Data collection was carried out by direct observation and interviews with the case study method. Data analysis uses marketing margin, farmer's share, and failure mode and effect analysis (FMEA) method. The koi fish production process at PT Solaris Koi Indonesia is in accordance with SNI 7734:2011 and fish quarantine according to the CKIB form. The supply chain consists of 20 grade A channels, 7 grade B channels, and 4 grade C channels run by the farmer, dealers, kropyokan dealers, and end consumers. Information flow is bidirectional, while price and product flow are one-way from upstream to downstream. Channels A Shusui 2, A Asagi 2, and A Showa 1 are the most efficient channels with the shortest stages. Risk variables related to price have the highest impact based on FMEA analysis.
Keyword: efficiency analysis, koi, production, risk analysis, supply chain

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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