Judul: Analisis Kelayakan Pengusahaan Pembenihan Ikan Nila GMT di Kelompok Tani Buni Sari, Caringin Wetan, Sukabumi
Abstrak: Analisis kelayakan merupakan salah satu bentuk analisa untuk menilai kelayakan dari suatu kegiatan usaha dan tingkat keuntungan bagi petani sebagai pengembalian atas investasi atau modal yang digunakan. Tujuan dari penelitian ini adalah untuk menganalisis kelayakan berdasarkan non finansial dan aspek finansial pada pengusahaan pembenihan ikan nila GMT (Genetically Male Tilapia) yang terbagi dalam tiga skenario. Disamping itu, dilakukan juga analisis mengenai tingkat kepekaan sebagai akibat adanya perubahan dalam suatu variabel usaha. Pemilihan responden sebanyak 14 orang petani ikan menggunakan teknik purposive. Data diolah menggunakan program Microsoft excel yang disajikan dalam bentuk tabulasi. Perhitungan biaya dan manfaat disusun dalam bentuk cash flow. Secara finansial dan non finansial, kegiatan pengusahaan pembenihan pada ketiga skenario layak untuk dilakukan. Empat kriteria investasi yakni NPV, Net B/C, IRR, dan Payback Period menunjukkan hasil yang melebihi standar kelayakan suatu usaha. Analisis sensitivitas menunjukkan bahwa penurunan jumlah produksi benih ikan nila GMT memiliki pengaruh lebih besar dibandingkan peningkatan harga pitik.
Keyword: 

Judul: Analisis kelayakan usaha pembenihan ikan nila GMT (Genetically Male Tilapia) di CV Dejee Fish, Kecamatan Caringin, Kabupaten Sukabumi.
Abstrak: Melihat potensi yang ada CV Dejee Fish melakukan pembukaan usaha baru khusus pembenihan ikan nila GMT (benih unggul) maka perlu dilakukan analisis kelayakan usaha. Tujuan penelitian ini untuk menganalisis kelayakan usaha berdasarkan aspek non finansial dan aspek finansial.Menganalisis pengaruh tingkat perubahaan yang terjadi pada suatu variabel usaha menggunakan switching value. Hasil analisis aspek non finansial yang terdiri dari aspek pasar, aspek teknis, aspek manajemen dan hukum, aspek sosial ekonomi dan budaya, serta aspek lingkungan usaha ini layak untuk dijalankan. Berdasarkan hasil analisis finansial usaha layak dijalankan dengan nilai NPV positif, Net B/C > 1, IRR > discount rate dan Payback Period < umur bisnis. Hasil analisis switching value dilakukan dengan dua perubahan komponen, yaitu penurunan jumlah output dan peningkatan biaya produksi usaha pembenihan nila GMT. Hasilnya adalah batas maksimum perubahan yang masih bisa ditolerir masing-masing sebesar 36.19 persen dan 70.19 persen untuk skenario I (empat macam output). Hasil skenario II (dua macam output) masing-masing sebesar 31.48 persen dan 54.19 persen.
Keyword: Nila GMT, analisis finansial, usaha pembenihan, studi kelayakan

Judul: Characteristic of Overshooting Top (OT) Based on  Himawari  8  Satellite  as  a  Convective  Cloud  Feature  that  Generates  Extreme Weather in the Java Island Region
Abstrak: Overshooting Top (OT) is a feature at the top of a convective cloud that is associated with extreme weather. Research on OT in tropical Indonesia is still very limited. The existence of geostationary satellites with wide area coverage and fast frequency observations is useful for observing the fast dynamics of the OT life cycle. Therefore, this study intends to analyze the relationship between OT and extreme weather, updraft and thermodynamic conditions of OT when extreme weather occurs, the best objective method for detecting OT in the day time and night time, and the spatiotemporal distribution of OT in the tropical region of Java Island during the 2018-2021 period. Based on visual analysis using visible channel and Himawari 8 sandwich products, 87% of extreme weather events in Java were accompanied by the appearance of OT. It indicates that the presence of the OT pattern is a convection cloud pattern or feature that is closely related to extreme weather events for the Java Island region. The existence of a time lag between the appearance of OT and extreme weather events on Java Island indicates that the OT of convection cloud can be used as a precursor or nowcasting for the appearance of extreme weather. Most of the convective cloud OT features during extreme weather events on Java Island have altitude that were only able to exceed the altitude of the equilibrium level and few were able to exceed the tropopause level of 9 km – 16 km. The difference in atmospheric conditions during extreme weather events on Java Island, which is in the tropics and subtropics, is a strong and unstable convective energy condition characterized by a larger CAPE, as well as unstable KI, LI, SI and TTI values. It is offset by kinematic factors in the form of a weak vertical wind shear (bulk wind shear 0-6 km) and a higher freezing point height. The difference between extreme weather events in the Java Island region and other tropical regions compared to subtropical regions is the strong updraft speed of convection clouds. The IRW Texture COMB algorithm based on the IRW-Texture Gradient modification and the COMB algorithm shows a significant increase in quality for detecting OT and non-OT pixels in Java. Rainy days with rainfall > 50 mm/day are very common in areas with an altitude of > 500 m. On the other hand, the level of convection activity which is indicated by the presence of OT and lightning is significantly reduced in this area. OT of convective clouds appear more frequently during the DJF season and less frequently during the JJA season. OT often appears during the day time and rarely at night time. Most OTs appear in the central part, away from the south and north coasts of Java Island during the day, while OTs that appear near the south and north coasts of Java Island can appear in the morning or afternoon.
Keyword: convective clouds, extreme weather, Overshooting Tops, Himawari 8 Satellite