Judul: Transformasi Komponen Utama Data citra Landsat TM5 Pada Areal Tanaman Padi
Abstrak: Analisis komponen utama mempakan salah satu metode statistika yang dapat digunakan untuk menggali informasi dari data citra TM5 khususnya dalam hubungaunya dengan multidimensi peubah. Transformasi komponen utama pada data nilai digital tanaman padi citra TM5 menghasilkan 3 komponen utama yang setara dengan transformasi kecerahan, kehijauan dan kelembaban Tasseled Cap. Tiga komponen utama pertama bertumt-turut merupakan unsur kehijauan (85.9 %), kecerahan (8.9 %) dan kelembaban (2.5 %).
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Judul: Principal Component Analysis (PCA) and Tasseled Cap Transformation (TCT) of Multispectral Drone Image for Identification of Rice Fields
Abstrak: Pemantauan lahan sawah dengan menggunakan drone menawarkan solusi baru, efisien, dan hemat biaya dalam identifikasi atau pengumpulan informasi kondisi tanaman padi di lahan sawah. Penelitian bertujuan mengidentifikasi kanal kehijauan, kecerahan, dan kekuningan dari foto drone multispektral dengan transformasi PCA dan TCT serta mengetahui perbedaan hasil kedua transformasi. Penelitian dilaksanakan pada petak sawah 7A dan 1B milik Balai Benih Padi dan Palawija (BBPP) Cianjur. Transformasi PCA pada foto drone multispektral dari padi sawah menghasilkan 3 komponen utama yaitu PCA 3 dari petak 1B dan 7A merepresentasikan kanal kehijauan, PCA 4 dari petak 1B dan PCA 2 dari petak 7A menggambarkan kanal kecerahan, dan PCA 2 dari petak 1B dan PCA 1 dari petak 7A merepresentasikan kanal kekuningan. Transfromasi TCT dinilai lebih baik dalam merepresentasikan kanal kehijauan, kecerahan, dan kekuningan serta lebih mampu dalam menjelaskan perbedaan-perbedaan yang nampak pada citra., Monitoring paddy fields using drones offers a new, efficient and cost effective solution in identifying or collecting information on the condition of rice plants in paddy fields. The research aims to identify greenness, brightness, and yellowness channels from multispectral drone images with PCA and TCT transformations and to determine the differences in the results of the two transformations. The research was carried out on rice fields 7A and 1B belonging to the Cianjur Rice and Vegetable Seed Center (BBPP). The PCA transformation on the multispectral drone of paddy fields produced 3 main components, namely PCA 3 of plots 1B and 7A representing greenish channels, PCA 4 of plots 1B and PCA 2 of plots 7A representing brightness channels, and PCA 2 of plots 1B and PCA 1 of plot 7A representing yellowish channels. The TCT transfromation is considered better in representing the channels of greenness, brightness, and yellowness and able to explain the differences that appear in the images.
Keyword: drone multispektral, principal component analysis, tasseled cap transformation

Judul: A Continuous Vaccination Strategy in the SVIR Epidemic Model
Abstrak: Vaccination is conducted to minimize the spread of a disease. The vaccination is usually done several times within a fixed time interval. In the SVIR model, it is assumed that individuals do not get immediate immunity following a vaccination program. So according to process of vaccination on SVIR model, there are two strategies, i.e. the continuous vaccination strategy (CVS) and the pulse vaccination strategy (PVS). In this study, only the CVS strategy in epidemic model SVIR is considered. Results of the study indicate that dynamics of the CVS system depends on the basic reproductive number. If the basic reproductive number is less than one, then the disease-free fixed point is asymptotically stable. It means that the disease will eventually disappear from the population. Conversely, if the basic reproductive number is greater than one, then the endemic fixed point is asymptotically stable, which means that the disease will remain exist in the population. Simulation result shows that the vaccination would minimize the spread of disease by reducing the basic reproductive number. If the time for the vaccinated recipients to obtain the immunity, as well as a possibility of vaccinated recipients to be infected are neglected, then the disease will be eradicated. This condition is called an over-evaluating effect of vaccination.
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