Judul: Pemetaan Sawah Baku Kawasan Berbukit Dengan Citra Quickbird dan TerraSAR-X
Abstrak: Estimasi produksi padi saat ini dilaksanakan oleh beberapa instansi antara lain: Badan Urusan Logistik (BULOG), Badan Pusat Statistik (BPS) dan Dirjen Bina Produksi Tanaman Pangan dan Hortikultura, Departemen Pertanian. Oleh karena cara pendekatan, kriteria penilaian, dan metode yang digunakan berbeda maka informasi yang diperoleh juga berbeda. Hal ini menyulitkan pengguna informasi dalam pemanfaatannya. Semua metode tersebut merupakan metode berbasis daftar (list frame), walapun telah digunakan alat GPS. Metode seperti ini sulit mengatasi tantangan menuju pertanian presisi yang terkait dengan akurasi estimasi (sampling error dan non-sampling error) dan jaminan lahan pangan abadi. Penelitian ini bertujuan untuk mendapatkan peta sawah baku di daerah non sentra produksi padi berdasarkan paradigma area frame dengan menggunakan teknologi inderaja resolusi tinggi optik dan radar. Dalam hal ini citra satelit radar asal Jerman, TerraSAR-X dan QUICKBIRD (standard imagery) .
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Judul: Pemetaan sawah baku Kabupaten Subang Bagian Timur dengan Citra Satelit Alos
Abstrak: The existing production estimation system for rice plant is not optimum yet. Therefore, the change of estimation system from list frame to area frame is needed. The area frame approach begin by using remote sensing with satellite image, where the baseline mapping rice field can be made. The purpose of this research is to map and to identify each single rice field parcel include its perimeter (galengan). This research take place in eastern part of Kabupaten Subang by using ALOS PRISM and ALOS PALSAR satellite imageries. Furtheremore, the resulted digitized rice field map is compared with the existing tabular data. Based on that data analysis, it was found that digitazed rice field map had a significant discrepancies compared to the existing data. Further exercise to reconcile the result is required through village base validation.
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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.
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