Judul: Aplikasi dan evaluasi citra ALOS PALSAR resolusi 50 m dan 12,5 m untuk identifikasi tutupan lahan: studi kasus di Kabupaten Brebes, Cilacap, Banyumas dan Ciamis
Abstrak: ALOS PALSAR is a remote sensing satellite to record the surface of the earth owned by Japan and it was launched by Japan Aerospace Exploration Agency (JAXA) in January 2006. The image of ALOS PALSAR refers to highquality of microwave sensor that used a radar technology. The sensor of ALOS PALSAR has 12,5 m and 50 m spatial resolution. The research for applications of ALOS PALSAR using land cover data are still very limited. Therefore, it needed a continued research about the capability of ALOS PALSAR 12,5 m and 50 m resolution imagery to identify the land cover. This research was located in Brebes, Cilacap, Banyumas and Ciamis. Analysis of ALOS PALSAR 12,5 m and 50 m resolution imagery was done using visual analysis and digital analysis. Visual analysis was done based on appearance of images and referring to interpretation element, while digital analysis is conducted using discriminant method. Evaluation of the accuracy was conducted by Kappa accuracy, overall accuracy and separability value. Visual analysis of ALOS PALSAR 50 m and 12,5 m resolution image produced 9 land cover classes, such as water body, a young plantation forest, middle aged-old age plants, mixed gardens, young rubber plantations, middle aged-old rubber plantations, settlements, cultivated fields/flooded and vegetated fields. Kappa accuracy of the visual classification is 63,52% and overall accuracy of the visual classification is 67,57%, while the digital analysis produce 5 land cover classes, such as water body, trees, mixed gardens, settlements and fields with 64,2% proportion correct for 50 m resolution image and 65% proportion correct for image 12,5 m resolution image.
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Judul: The Aplication of ALOS PALSAR Image 50 m resolution and ALOS AVNIR-2 Image 50 m resolution for Land Cover Identification at Tuban, Blora, Rembang, and Bojonegoro
Abstrak: ALOS (Advance Land Observing Satellite) adalah satelit penginderaan jauh terbesar yang dikembangkan dan diluncurkan oleh JAXA’s Tanegashima Space Center yang membawa 3 sensor di dalamnya yaitu Panchromatic Remote Sensing Instrument for Stereo Mapping (PRISM) dengan resolusi 2,5 meter yang memiliki sensor optik, Advanced Visible and Near Infrared Radiometer type-2 (AVNIR-2), resolusi 10 meter yang memiliki sensor optik dan Phased Array type L-band Synthetic Aperture Radar (PALSAR) resolusi 10 meter dan 100 meter yang memiliki sensor radar. Penelitian ini memiliki tujuan untuk membandingkan kemampuan citra ALOS PALSAR resolusi 50 m kombinasi RGB HH-HV-HH/HV dan citra ALOS AVNIR-2 resolusi 50 m kombinasi RGB 3-4-2 dalam mengidentifikasi penutupan lahan pada studi kasus di Kabupaten Tuban, Blora, Rembang dan Bojonegoro. Hasil penelitian ini diharapkan dapat membantu menyelesaikan permasalahan laju kerusakan hutan melalui penatagunaan lahan yang sesuai dan pengelolaan hutan yang lestari. Metode yang digunakan adalah analisis identifikasi objek di lapangan, analisis diskriminan, analisis visual Citra ALOS PALSAR resolusi 50 m kombinasi RGB HH-HV-HH/HV skala 1:50.000 dan citra ALOS AVNIR-2 resolusi 50 m kombinasi RGB 3-4-2 skala 1:50000, analisis separabilitas dan analisis uji akurasi. Hasil analisis secara visual citra ALOS AVNIR-2 resolusi 50 m kombinasi RGB 3-4-2 menampilkan 8 kelas tutupan lahan, yaitu tutupan lahan badan air, pertanian lahan kering, tambang kapur, bekas tebangan, sawah, kebun campuran, pemukiman, dan hutan tanaman jati, sedangkan citra ALOS PALSAR resolusi 50 m kombinasi RGB HH-HV-HH/HV hanya mampu menampilkan 7 kelas tutupan lahan, yaitu pemukiman, sawah, kebun campuran, pertanian lahan kering, lahan terbuka, badan air, dan hutan tanaman jati. Nilai uji akurasi kappa yang dihasilkan oleh citra ALOS PALSAR resolusi 50 m, yaitu sebesar 74,40%, sedangkan citra ALOS AVNIR-2 resolusi 50 m menghasilkan nilai uji akurasi kappa, yaitu sebesar 81,62%. Klasifikasi secara digital citra ALOS PALSAR resolusi 50 m menghasilkan hasil yang lebih baik dengan nilai N – Correct 79 dan proportion correct 58,5%.
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Judul: The Effects of Hypothyroidism in the Fertility of Male Rats
Abstrak: Thyroid hormones are involved in the development and maintenance of virtually all tissues. The purpose of the study is to understand effects of the neonatal hypothyroidism in the fertility of male rats. Recent studies with juvenile rats indicate that changes in thyroid function early in life have a major impact on the endocrine and/or paracrine factors regulating testicular growth and function. However, one should keep in mind that hypothyroidism is a complex hormonal dysfunction rather than a single hormonal defect. Hypothyroidism has been also shown to reduce the secretion of GnRH (gonadotropins releasing hormone), LH (Luteinizing Hormone), FSH (Follicle Stimulating Hormone), GH (Growth Hormone) and testicular testosterone in rats. Therefore, many of the testicular changes observed in prolonged hypothyroidism could result in some degree of diminished levels of the aforementioned hormones. The transient neonatal hypothyroidism model results in the unnatural testicular development and in sperm production in neonates hence resulting in decreased fertility upon puberty.
Keyword: Hypothyroidism, Neonates, Testicular Growth, Fertility