Judul: Penerapan Model ARIMA untuk Prediksi Anomali Curah Hujan Berdasarkan Indeks Monsun dan El Niño di Beberapa Kawasan di Indonesia.
Abstrak: This study based on atmosphere-ocean interaction that is very important to be investigated because of its influences to the rainfall variability over Indonesia. This study aims to investigate Monsoon and Niño 3.4 interaction in influencing rainfall fluctuation over Indonesia. The study areas cover Lampung, Sumbawa Besar, Indramayu, Banjarbaru, and Pandeglang from Januari 1976 - Desember 2000. The results of Power Spectral Density (PSD) and Wavelet analysis on rainfall anomaly and monsoon index data show strong at 12 months. Dominant oscillation pattern of Niño 3.4 is about 60 months. The result of regression analyses shows more significant relation between rainfall anomaly and AUSMI (Australian Monsoon Index) and WNPMI (Western North Pacific Monsoon Index). Therefore, it is suggested that the Monsoon (AUSMI and WNPMI) and El-Niño(Niño 3.4) can be used for further analysis. This study was undertaken with assumption that Monsoon oscillation and El-Niño are interacted and the model is developed by using multivariate regression method: Y = a + bAUSMI + cWNPMI + dNiño3.4. By using Box-Jenkins method based on ARIMA (Autoregressive Integrated Moving Average), the prediction model that is close to observed time series data of rainfall anomaly is ARIMA (1,0,1)12 with model equation Zt = 0.9989Zt-12 - 0.9338at-12 + at (AUSMI), ARIMA (1,1,1)12 with model equation Zt = -0.0674Zt-12 + Zt-12 - Zt-24 - 0.9347at-12 + at,(WNPMI), dan ARIMA (2,0,2) with model equation Zt = 3.594Zt-1 -0.8362Zt-2 – 1.634at-1 - 0.1053at-2 + at (NINO3.4). Model equation shows that time series data forecast of rainfall anomaly depend on previous “t” months data and previous ”t” months error.
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Judul: Pengembangan model monsun indonesia berbasis hasil analisis data indeks monsun regional
Abstrak: Monsoon is one of regional phenomenon that affects weather and climate in Indonesia. This is caused by the territory of Indonesia which is located in equatorial zone and between Asia in the north and Australia in the south. Due to the location, there are two monsoons named Asia which causes wet season (December-January-February) and Australia which causes dry season (June-July-August). Until this time, Indonesia doesn’t have monsoon index which is needed by BMKG (Meteorology, Climatology and Geophysics Agency). Regional monsoon index (RMI) data must be calibrated with data from Indonesia, EAR (Equatorial Atmosphere Radar) to examine the relation of EAR with IMR data. Selected time-series of IMR data is used to develop monsoon model. The method that used is monsoon analysis and spectral analysis with Matlab and cross correlation analysis and the Box-Jenkins method, ARIMA with SPSS 16.0. The results of the analysis show that AUSMI (Australian Monsoon Index) at 200 mb layer which oscillate around 12 months has high correlation with EAR data 0.781. The appropriate model to show the monsoon model is ARIMA (1,1,1). AUSMI period t is decided by one and two months latest data (Zt-1) and (Zt-2) and a month error latest data (at-1) with equation Zt = 1.047 Zt-1-.047Zt-2 + 0.093at-1. The validation results obtained using model with actual data IMR February 2004-December 2008 give average error 2.3906 and correlation 0.7139.
Keyword: Monsoon, EAR, Regional monsoon index data, Box-Jenkins(ARIMA), Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Perancangan Proses Produksi Telur Asin Rendah Kolesterol
Abstrak: Telur asin merupakan produk olahan telur yang digemari masyarakat, tetapi mengandung kolesterol yang melebihi batasan konsumsi harian manusia. Tahap pengolahan, telur asin direndam dalam larutan khusus guna menurunkan kandungan kolesterol di dalam telur. Proses ini melibatkan pengaturan waktu pemeraman, konsentrasi larutan, dan bahan-bahan lainnya untuk mencapai hasil yang diinginkan. Formulasi telur asin yang terpilih yaitu pemeraman selama 12 hari dalam larutan garam 32,5% yang dicampur bawang putih, sereh, dan daun jeruk cincang, perendaman dalam larutan soda 20% selama 4 jam, dan dikukus selama satu jam. Kadar kolesterol sebesar 233,39 mg/100 g pada hari pertama dan mengalami penurunan menjadi 131,61 mg/100 g pada hari kesepuluh., Salted eggs are a popular egg product among the community, but they contain cholesterol that exceeds the daily human consumption limit. In the processing stage, the salted eggs are immersed in a special solution to reduce the cholesterol content inside the eggs. This process involves adjusting the soaking time, solution concentration, and other ingredients to achieve the desired results. The selected salted egg formulation is marinating for 12 days in 32.5% salt solution mixed with garlic, lemongrass, and chopped lime leaves, marinating in 20% soda solution for 4 hours, and steaming for one hour. The cholesterol level was measured at 233.39 mg/100g on the first day and decreased to 131.61 mg/100g on the tenth day.
Keyword: Soda solution, Low Cholesterol Salted Eggs, Process Design, Standardized Salted Eggs