Judul: Analisis data percobaan faktorial 4x4 dengan perlakuan-perlakuan berpasangan terhadap blanko (Plasebo) dengan metode doolittle dipersingkat
Abstrak: Tujuan dari telaahan statistika ini adalah ingin meli- hat efisiensı dari percobaan yang dilakukan (terutama terha- dap prosedur pengelompokan yang digunakan), serta mencari analısıs yang sesuai dengan keadaan data yang telah diperoleh.....
Keyword: 

Judul: Penerapan Metode FEAR pada Analisis Data Percobaan dengan Rancangan Faktorial Pecahan Dua Taraf
Abstrak: Biaya menjadi salah satu kendala dalam pelaksanaan penelitian. Penelitian dengan banyak pengaruh yang ingin diduga akan membutuhkan banyak satuan percobaan dan hal ini berimplikasi terhadap biaya yang digunakan. Salah satu cara untuk mengurangi biaya adalah dengan mengurangi banyak satuan percobaan. Penelitian dengan banyak satuan percobaan lebih sedikit dari banyaknya pengaruh yang akan diduga mengakibatkan penulis tidak dapat menggunakan pendekatanpendekatan klasik untuk menentukan penduga pengaruh faktorial. Pada tahun 2007 B. Dejaegher, X. Capron dan Y. Vander Heyden memperkenalkan metode Fixing Effects and Adding Rows (FEAR) untuk menyelesaikan masalah penentuan faktor yang signifikan pada rancangan lewat-jenuh. Penulis menilai bahwa metode ini memungkinkan untuk diterapkan pada penentuan pengaruh yang signifikan pada data percobaan dengan rancangan faktorial pecahan (RFP). Penelitian ini dimaksudkan untuk mengkaji kemungkinan tersebut. Berdasarkan hasil penelitian, metode FEAR baik digunakan untuk melakukan pendugaan pengaruh faktor pada rancangan faktorial pecahan dua taraf.
Keyword: FEAR, Rancangan faktorial pecahan, Seleksi faktor

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