Judul: Pengaruh cara penggunaan zeolit dalam sistem resilkulasi terhadap pertumbuhan dam kelangsungan hidup ikan mas
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh dua cara penggunaan zeolit: yaitu pemberian secara non periodik (perlakuan B) dan periodik (perlakuan C) serta sebagai kontrol digunakan pasir (perlakuan A), terhadap pertumbuhan dan kelangsungan hidup ikan mas. Pada perlakuan B zeolit diberikan satu kali untuk selama penelitian sebanyak 43,20 kg. Pada perlakuan C zeolit diberikan sebanyak 1,08 kg per hari. Sebagai parameter utama yang diteliti adalah laju pertumbuhan harian rata- rata individu dan kelangsungan hidup. Parameter lain yang diteliti meliputi produksi dan efisiensi makanan serta kualitas air sebagai penunjang. Penelitian dilakukan di Laboratorium Fakultas Perikanan IPB Darmaga, dari tanggal 9 November sampai dengan 19 Desember 1987. Ikan mas yang digunakan memiliki bobot individu rata-rata 9,08 0,04 gr dengan kepadatan 81 ekor tiap bak. Wadah penelitian berupa bak berukuran 2,75 x 1,60 X 13 sebanyak 18 buah; sembilan buah berfungsi 0,60 m sebagai bak pemeliharaan dan sisanya sebagai bak filter.
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Judul: Pengaruh pemberian zeolit dalam pengangkutan ikan mas (Cyprinus carpio, L.) berukuran 100 gram
Abstrak: Tawar Penelitian dipusatkan di Balai Budidaya Air BBAT)-Sukabumi, dari tanggal 23-24 Juni 1989 Rute pengangkutan adalah sepanjang jalan dari BBAT ke Jakarta pulang-pergi selama 12 jam. Penelitian bertujuan untuk mengetahui pengaruh. pe nambahan zeolit ke dalam media terhadap kelangsungan hi- dup ikan mas (Cyprinus carpio, L.) ukuran 100 gram yang diangkut dengan cara tertutup. Rancangan penelitian yang digunakan adalah rancang- an acak lengkap (RAL) dengan empat perlakuan yakni dosis zeolit 0, 490.0. 980,5, dan 1471,0 gr/3 liter air, dengan 5 ulangan. Kepadatan ikan yang diuji adalah 25 ekor/ riter air. Perbandingan volume air dan oksigen 1:3...
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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