Judul: Pengaruh pemberian berbagai tingkat halquinol dan tiamulin terhadap performans ayam pedaging pada berbagai tingkat kepadatan kandang
Abstrak: Penelitian ini dilandasi oleh latar belakang pemikiran bahwa pengelolaan yang bersifat nutritional dan perkandangan dapat berpengaruh terhadap lingkungan di dalam tubuh dan akhirnya terhadap produktivitas. Halquinol dan tiamulin yang bersifat sebagai “feed additive" akan dapat meningkatkan efisiensi penggunaan ransum dan meningkat an daya tahan ayam terhadap berbagai kondisi lingkungan. Kepadatan kandang akan berpengaruh terhadsp berbagai suasana lingkungan berupa perubahan temperatur lingkungan di sekitar ayam, kadar oksigen di dalam ruangan kandang aliran udara di dalam kandang, tingkah laku sosial, dan berbagai pengaruh lain yang akhirnya mempengaruhi produktivitas. Pendekatan yang telah dilakukan adalah menguji efek berbagai tingkat kepadatan kandang, penambahan berbagai tingkat halquinol dan tiamulin di dalam ransum terhadap performans ayam pedaging. Fokus perhatian ditujukan pada pengaruh sederhana masing-masing faktor dan terhadap performans ayam pedaging. Untuk informasi penunjang, dipelajari pula beberapa pengaruh perlakuan terhadap reaksi fisiologis dari ayam pedaging.
Keyword: Chicken performance;, Cages density;

Judul: Pengaruh lingkungan (tingkat kepadatan) kipas angin dan perbedaan ransum terhadap konsumsi makanan dan berat ayam pedaging
Abstrak: Tujuan dari penelitian ini adalah untuk mempelajari pengaruh lingkungan kandang dengan kepadatan yang berbeda dan penggunaan kipas angin terhadap performance pada ayam pedaging (konsumsi makanan, berat ayam dan konversi makanan). Disamping itu juga untuk mempelajari pengaruh tingkat protein dan asam amino yang berbeda dalam makanan. Ternak ayam yang dipergunakan adalah strain Arbor Acres (AA) dengan perlakuan: (1) kepadatan padatan 10 ekor per m2 , A kepadatan 15 ekor 2 (A), Al2 per m ke- (2) kipas angin mulai minggu kelima (B), B0 tanpa kipas angin, B1 dengan kipas angin; (3) ransum (C), c1 dengan kandungan protein untuk starter 21% dan untuk finisher 19% ditambah methionine, c dengan kandungan protein 19% untuk starter, 17% untuk finisher ditambah lysine dan methionine, c3 dengan kandungan protein 17% untuk starter 15% untuk finisher ditarnbah lysine dan methionine, dan c4 dengan kandungan protein 17% untuk starter, 15% untuk finisher.
Keyword: Chicken;, Kepadatan kandang;, Poultry nutrition;, Bogor Agricultural University;

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