Judul: Pembuatan Masterplan Kawasan Pusat Produksi Benih dan Induk Ikan Lokal di Desa Buko Poso, Way Serdang, Mesuji, Lampung
Abstrak: Kabupaten Mesuji terdapat banyak sungai, kanal, waduk, dan rawa-rawa yang bisa dimanfaatkan sebagai sarana pengembangan perikanan. Namun, tingkat produksi perikanannya masih mengandalkan dari hasil tangkapan sehingga dapat menurunkan ketersediaan dan populasi ikan. Tujuan penelitian ini adalah menyusun masterplan untuk pembangunan pusat produksi benih dan induk ikan lokal dengan memperhatikan kesesuaian lahan di Desa Buko Poso, Kecamatan Way Serdang, Kabupaten Mesuji, Provinsi Lampung. Kegiatan observasi lapang meliputi pengukuran kualitas air secara in situ dan ex situ pada empat stasiun pengamatan, pengambilan sampel tanah pada lima titik dengan tiga kedalaman berbeda, topografi lahan menggunakan drone, dan pemetaan batas lahan menggunakan GPS. Hasil analisis data pengujian tekstur tanah menggunakan segitiga tanah menunjukkan tanah bertekstur liat. Komoditas yang sesuai untuk dibudidayakan adalah baung, gabus, belida, jelawat, dan nila. Infrastruktur yang dapat dibangun adalah kolam filter tandon, IPAL, hatchery, bak pendederan, bak pemeliharaan induk, kolam pemijahan, dan infrastruktur pendukung lainnya., Kabupaten Mesuji has many rivers, canals, reservoirs, and swamps that can be utilized as facilities for the development of fisheries. However, the level of fish production still relies on catches, which can result in reducing the availability and population of fish. The objective of this research is to create a master plan for establishing a center for local fish seed and broodstock production, considering the land suitability in Buko Poso Village, Way Serdang Sub-district, Mesuji District, Lampung Province. Field observation activities include in-situ and ex-situ water quality measurements at four observation stations, soil sampling at five points with three. The results of the soil texture analysis using the soil triangle indicate clay-textured soil. The suitable species for cultivation include Asian Redtail Catfish, Striped Snakehead, Clown Knifefish, Hoven's Carp, and Nile Tilapia. Infrastructure that can be built includes filter tank ponds, wastewater treatment plants, hatcheries, nursery ponds, broodstock maintenance ponds, breeding ponds, and other supporting facilities.
Keyword: fish, mapping, masterplan, topography

Judul: Studi Kelayakan Lokasi Budidaya Pembenihan di Desa Buko Poso, Mesuji, Lampung
Abstrak: Buko Poso Village located in Way Serdang District, Mesuji Regency has a fairly good quantity and quality of water, but this potential has not been utilized for aquaculture activities. The purpose of this study is to analyze the feasibility of the location in Buko Poso Village, Mesuji, Lampung as a location for aquaculture activities. Field observation activities include direct (in situ) and indirect (ex situ) water quality measurements at four different locations, soil sampling, mapping using GPS and drones, taking market price data. Topographic map depicts Buko Poso Village included in the lowland area with a research area of 4.9 ha. The results of data analysis on water quality using the scoring method show that Buko Poso Village tends to be in class S3 (slightly appropriate), meaning that it has serious limiting factors so that to improve water quality, special treatment is needed. The soil condition in Buko Poso Village is mostly clay textured. Commodities that are suitable for cultivation include baung fish, jelawat fish, belida fish, snakehead fish, and tilapia which have a fairly high economic value.
Keyword: fish, location feasibility, water quality

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.
Keyword: