Judul: Studi Kaliberasi Citra Asar Envisat untuk Aplikasi Biomasa pada Hutan Tanaman Industri Pelalawan, Riau
Abstrak: Envisat (Environment Satellite) an active system of remote sensing lunched by ESA (European Space Agency) for environmental mission, carries an array of many sophisticated sensors and instruments. One of the instrument is ASAR (Asar Advanced Aperature Radar) wicha can detect changes in surface heights with sub-millimeter precision. The data that Envisat ASAR instrument gained is helpful for natural and land resource inventory, especially for a big amount of natural and land resource country, like Indonesia. The Data needs to be process. Basic Envisat SAR Toolbox (BEST) issued by ESA has a module to calibrate Envisat ASAR products, but if it is used to calibrate ASAR image that scan tripics the calibrated images will not be good enough, so it needs to be corrected throught CAL module.
Keyword: 

Judul: Aplikasi citra alternating polarization precision(APP) advanced synthetic aperture radar(ASAR)/envisat untuk analisis biomassa hutan tanaman
Abstrak: Penginderaan jauh sistem radar merupakan salah satu cara yang dapat digunakan untuk memperoleh informasi dalam segala kondisi karena mampu mengatasi hambatan atmosferik seperti hujan, asap, awan dan lain-lain. Penelitian ini secara umum bertujuan untuk mengidentifikasi dan menganalisis citra Alternating Polarization Mode Precision Image (APP) Advanced Synthetic Aperture Radar (ASAR) / Envisat polarisasi VH dan polarisasi VV pada dua titik waktu, yaitu 10 Juli 2003 dan 1 Januari 2004 dengan daerah liputan Test Site-C, Kabupaten Pelalawan, Provinsi Riau. Hasil penelitian menunjukkan, citra APP yang polarisasinya paling cocok untuk pengamatan biomassa tanaman A. crassicarpa adalah citra VV03 dan citra VH04. Kedua citra tersebut saling melengkapi, sehingga mengkombinasikan polarisasi citra radar adalah cara yang sangat tepat. Korelasi antara INT dengan parameter biomassa Myield menghasilkan nilai koefisien korelasi tertinggi pada citra VV03 sedangkan parameter Voltot menghasilkan nilai koefsien korelasi tertinggi pada citra VH04. Korelasi antara INT dengan umur tanaman menghasilkan nilai koefisien yang berbeda-beda tergantung cara perhitungan. Perbedaan respon vegetasi terhadap energi gelombang mikro yang digunakan pada sistem radar dipengaruhi oleh perbedaan kemampuan penetrasi panjang gelombang yang berbeda-beda, polarisasi dan kandungan biomassa tanaman itu sendiri.
Keyword: 

Judul: Model’s Dynamics for Lymphocytes Recovery on the HIV presence with Protease Inhibitor Therapy.
Abstrak: HIV is a member of retrovirus that especially attacks lymphocytes or white blood cells, known as CD4+ T cells. New T cells created from sources within the body such as the thymus and by proliferation of existing T cells. In this paper, influence of protease inhibitor therapy in HIV dynamics will be analyzed. The influence can be categoried in three models, which are model HIV without drug therapy, model HIV with protease inhibitor and model T cell recovery. In the models, three parameters which are uninfected cells population, infected cells population and virus population are studied. From HIV without drug therapy model it is obtained two types fixed point which are uninfected fixed point and infected fixed point. The stability of fixed point depends on basic reproduction number which is influenceed by the total number of virus produced by a cell during its lifetime. From HIV with protease inhibitor therapy model it is obtained two type fixed points. The stability of fixed point depends on basic reproduction number. Other than influenceed by the total number of virus produced by a cell during its lifetime, basic reproduction number of this model also affected by the effectiveness of a protease inhibitor. Basic reproduction number of this model is smaller than that of model HIV without drug therapy. In the model T cell recovery, new T cells created only from sources within the body, and T cells can be invulnerable to HIV infection after the therapy. From the model it is obtained only one fixed point that is uninfected fixed point. The stability of fixed point depends on basic reproduction number. The total number of virus produced by a cell during its lifetime and the effectiveness of a protease inhibitor determine the basic reproduction number. Basic reproduction number of this model is smallest than that of other models.
Keyword: