Judul: Vermicomposting oleh Cacing Tanah (Eisenia fetida dan Lumbricus rubellus) pada Empat Jenis Bedding
Abstrak: Berbagai bentuk dan jenis sampah dihasilkan oleh masyarakat. Sampah yang terkumpul disekitar rumah, pasar maupun di TPA semakin sulit untuk ditanggulangi. Salah satu cara yang baik untuk mereduksi sampah domestik adalah dengan melakukan vermicomposting. Vermicomposting merupakan proses konsumsi bahan organik dengan melibatkan kerjasama cacing tanah dan mikroorganisme. Hasil akhir dari proses ini adalah vermikompos yang sangat berguna bagi tanaman. Cacing tanah E. fetida dan L. rubellus merupakan dua dari spesies cacing tanah yang sangat berpotensi dalam proses vermicomposting.
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Judul: Efektivitas Penggunaan Jenis Wadah Sarang Cacing Tanah (Eisenia foetida) dalam Proses Vermicomposting
Abstrak: bantuan cacing tanah. Dalam penelitian ini dipelajari efektivitas 3 jenis wadah sarang cacing tanah (Eisenia foetida) dalam mengolah sampah organik dapur, diantaranya: bakul, ember dan pot tanah liat (masing-masing dengan 3 ulangan). Bahan yang digunakan sebagai media (bedding) terdiri atas: sobekan kertas, tanah dan sayuran yang telah dicacah. Pemeliharaan dan pengamatan dilakukan selama 30 hari. Hasil percobaan menunjukkan bahwa jenis wadah tidak mempengaruhi persentase bobot sampah yang didekomposisi oleh cacing tanah. Jenis wadah juga tidak mempengaruhi mortalitas dan bobot cacing tanah, bobot kascing, bobot tanah serta kertas yang terdekomposisi. Hal ini mungkin karena kondisi lingkungan, terutama suhu media yang masih dalam kisaran suhu optimum bagi cacing tanah (antara 21.1-29.4oC). Hasil yang berbeda nyata hanya terlihat pada produksi jumlah kokon yang dihasilkan (P=0.0052). Bakul merupakan jenis wadah yang memiliki jumlah kokon terbanyak bila dibandingkan dengan ember dan pot tanah liat. Kadar C/N rasio kascing yang dihasilkan tiap jenis wadah berkisar antara 22.4-24.12 dan pH kascing 7.4-7.5.
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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