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.
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Judul: Mathematical model of Hematopoietic Stem Cell in Chronic Myelogenous Leukemia with and without Therapy
Abstrak: Leukemia or blood cancer is a diverse group of neoplastic disease, characterized by the multiplication of abnormal leukocytes or malignant transformation of blood-forming cells in bone marrow and lymphoid tissues. One of the most common types of leukemia is Chronic Myelogenous Leukemia (CML), which is usually diagnosed by the presence of certain chromosomal abnormalities, the so-called Philadelphia chromosome (Ph). One of the treatments of CML is Granulocyte Colony-Stimulating Factor (G-CSF). In this paper, we discuss two Hematopoietic Stem Cell (HSC) models, i.e. HSC without treatment and HSC with G-CSF treatment. The model of HSC without treatment included three equations representing the dynamics of HSC, leukocyte and platelet. Whereas, the model of HSC with G-CSF treatment includes the previous three equations and adds two more equations representing G-CSF injection and G-CSF circulation. The stability behavior of the system approaching the equilibrium points in the simulation study is carried out using Mathematica 7.0. The simulation results show that the G-CSF treatment can successfully decrease the number of HSC, which means reducing the CML.
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