Judul: Pengembangan Model Penduga Hujan Bulanan Menggunakan Data Satelit TRMM pada Tiga Pola Hujan di Indonesia
Abstrak: Rainfall is one of the atmosphere parameters which is quite difficult to predict because of its very high variability on space and time. The recent development of rainfall observation technology nowadays is using rainfall satellite. This satellite has near real time rainfall monitoring, wide coverage and fast access. In this study, climatological analysis of rainfall pattern, statistical analysis to evaluate and validate TRMM data using selected ground stations and TRMM data, development of correction factor for TRMM data and monthly rainfall prediction using ARIMA model, have been done in three regions with different rainfall pattern. Those areas are monsoonal pattern in Lampung, East Java and Kalimantan Selatan; equatorial pattern in North Sumatera and West Kalimantan; and local pattern in Maluku. The validation analysis showed very high correlation with the gauge data for monsoonal pattern area (>0.80), high correlation for equatorial (>0.60) and local pattern area (>0.75). Each pattern area has a correction equation. In general, the error of corrected TRMM data decreased for monsoonal, equatorial and local pattern. The model of monthly rainfall prediction has been developed for corrected TRMM data with 95% level significance. The verification of model showed high coefficient correlation (r) in local pattern and monsoonal pattern, but lower on equatorial pattern.
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Judul: Validasi Data Curah Hujan Global Satellite Mapping of Precipitation (GSMaP) pada Tiga Pola Hujan di Indonesia.
Abstrak: Keterbatasan data observasi seperti data tidak cukup panjang, tidak lengkap/kosong, dan sebaran stasiun yang kurang merata menyebabkan analisis dan prediksi hujan sulit dilakukan. Salah satu cara untuk mengatasi keterbatasan tersebut adalah penggunaan data satelit seperti GSMaP, namun data satelit harus divalidasi sebelum digunakan. Penelitian ini bertujuan untuk memvalidasi data hujan GSMaP terhadap data observasi pada tiga pola hujan di Indonesia. Melalui analisis data time series diketahui data hujan GSMaP cenderung memiliki nilai yang lebih kecil dibandingkan data observasi, namun memiliki pola data yang hampir sama pada ketiga pola hujan. Selain itu, GSMaP juga mampu menduga hari hujan dengan cukup baik. Berdasarkan karakteristik spasial dan temporal, data GSMaP memiliki kemiripan dengan observasi pada mode 1 dan 2. Sedangkan berdasarkan analisis skala waktu, data GSMaP memiliki variabilitas iklim yang dimiliki data observasi pada ketiga pola hujan. Berdasarkan karakteristik spasial, temporal dan skala waktu, data GSMaP dapat digunakan untuk analisis variabilitas iklim yang terjadi di daerah tropis seperti monsun, ITCZ, dan MJO.
Keyword: GSMaP, korelasi, time series, mode, skala waktu

Judul: Acute Oral Toxicity Lethal
Dose 50 (LD50) of Cayenne Pepper (Capsicum annuum) Infusion in DDY Strain
Mice (Mus musculus)
Abstrak: In recent years, there has been a growing interest in herbal remedies such as cayenne pepper which is known for its versatility beyond its culinary use. Cayenne pepper’s phytochemicals, including capsaicinoids, carotenoids, phenolic compounds, vitamins, and minerals, offer antioxidant, antimicrobial, and antiinflammatory properties, making it a valuable ingredient in various fields such as veterinary medicine, agro-food, cosmetics, and pharmaceuticals. However, concerns regarding the potential risks of cayenne pepper consumption as herbal medicine arise. This study aims to determine the acute oral toxicity lethal dose 50 (LD50) of cayenne pepper infusion in female DDY strain mice and its effects on the mice's organs. The research involved 20 DDY strain female mice divided into 4 groups which are control group (administered with distilled water) and treatment groups that are given cayenne pepper infusion at doses of 5, 10, and 15 g/kg BW orally. The observed variables included mortality, clinical symptoms, physiological responses, and organ weight. Acute toxicity testing indicated that the cayenne pepper infusion falls into the category of practically non toxic formulations. Administration of the cayenne pepper infusion up to a dose of 15 g/kg BW did not induce toxicity symptoms, such as clinically pathological symptoms, macro anatomical organ changes, or mortality nor affect both weight gain and loss.
Keyword: cayenne pepper, infusion, acute oral toxicity, DDY strain mice, herbal medicine