Judul: Analisis Indeks Vegetasi Padi Menggunakan Kamera Multispektral Berbasis Drone dan Citra Landsat 8 di Karawang, Jawa Barat.
Abstrak: Tanaman padi (Oryza sativa) merupakan komoditas terpenting di Indonesia. Sampai saat ini kebutuhan pangan manusia di Indonesia masih didominasi oleh beras. Teknologi penginderaan jarak jauh diperlukan untuk mengetahui informasi tentang tanaman padi. Tujuan dari penelitian ini adalah untuk mengetahui hubungan antara NDVI multispektral dengan NDVI Landsat 8 pada fase vegetatif dan generatif. Data sekunder yang digunakan dalam penelitian ini yaitu data multispektral dari kamera Parrot Sequoia beresolusi 0.076, data RGB dari kamera Zenmuse X4S beresolusi 0.036 m dan data Landsat 8 beresolusi 30 m pada tanggal 17 Juni 2017 dan 4 Agustus 2017. Analisis data menggunakan regresi dan korelasi, uji t, diagram boxplot, uji ANOVA, dan uji BNT. Dalam petakan sawah, hubungan antara NDVI drone dan NDVI Landsat 8 pada fase vegetatif dan generatif tidak begitu kuat karena nilai koefisien korelasinya lebih kecil dari 0.6 sedangkan dalam grid Landsat 8, hubungan antara NDVI drone dan NDVI Landsat 8 kuat karena nilai koefisien korelasinya lebih besar dari 0.6.
Keyword: Karawang, Landsat 8, multispektral, NDVI

Judul: Analisis DataTime Series NDVI-SPOT VEGETATION Untuk Tanaman Padi (Studi Kasus: Kabupaten Karawang)
Abstrak: Remote sensing has become very important to various fields of science, especially agriculture. Rice crop growth cycle can be monitored using multi temporal remote sensing application, such as SPOT-Vegetation image. This research presents the time series analysis to monitor growth phase of rice crop in Karawang using NDVI. Based on NDVI, analysis of fenology trends from rice crop growth can be done to help determine plant season, optimal vegetative phase, fallow phase after harvest and spatial distribution pattern formed in one plant season. This research show that for rice crop Karawang in 2007 has high level of vegetation index and reach optimal vegetative growth phase in 70-90 days after planting. This result also stated before in research done by Yang and Su in 1998, it is stated that NDVI value will reach its peak around 70 days after planting and decrease following the aging of the plant.
Keyword: 

Judul: Truncated Stop Loss as a Optimal Solution of Reinsurance Agreement in One-Period Model
Abstrak: Reinsurance is one of risk management efforts of an insurance company, which is called the cedent. Similar with insurance, reinsurance constitutes the cedent to pay the premium. We consider one-period reinsurance model and derive a rule which minimizes the ruin probability of the cedent for a fixed reinsurance premium. Therefore, it is needed to construct an optimal reinsurance agreement for the cedent. The premium is calculated according to four different principles, i.e. economic, generalized zero-utility, Esscher, and mean-variance principles. Stop loss is a reinsurance contract which protect the insurance company for losses that exceed a certain amount. The result of this research shows that a truncated stop loss is an optimal agreement in the class of all reinsurance contracts with various premiums calculated using above mentioned principles.
Keyword: