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: Aplikasi dan Evaluasi Citra ALOS PALSAR Resolusi 50 m, Resolusi 12,5 m, dan Resolusi 6 m untuk Identifikasi Tutupan Lahan (studi kasus di Kabupaten Humbang Hasundutan, Kabupaten Tapanuli Utara, dan Kabupaten Samosir)
Abstrak: The application of remote sensing technology for rasionalization land resources data usage has more benefit than data collecting in conventional ways. Remote sensing techniques have been used in Indonesia for forest inventory and forest resources monitoring. Indonesia‟s geographical position where is in the tropics area that has vast cloud cover limits the use of optical satellite image data. To overcome the optical satellite image weakness, active remote sensing system (radar) is currently available. One of the satellites carrying radar sensor which was launched by the Japanese government is ALOS (Advanced Land Observing Satellite) with PALSAR (Phased Array type L-band Synthetic Aperture Radar) as its one of the sensor. This sensor is an active microwave sensor which has capability to penetrate thick cloud layer. The objective of this research is to analyze the ability of ALOS PALSAR satellite image of 50 m, 12.5 m, and 6 m resolutions on land cover classification at Humbang Hasundutan Regency, North Tapanuli Regency, and Samosir Regency. The observation has delivered 16 land cover classes, which are as follow: water body, harvested rice field, cultivating rice field, just-planted rice field, bushes, coffee plantation, dry land agriculture, town settlement, village settlement, bare land, nature forest, Eucalyptus plantation year 2010, Eucalyptus plantation year 2009, Eucalyptus plantation year 2006, Eucalyptus plantation year 2007, and Eucalyptus plantation year 2008. The result of digital interpretation of the ALOS PALSAR satellite image 50 m, 12.5 m and 6 m resolutions obtained 6 classes of land cover which are as follows: water body, rice field, dry land agriculture, settlement, bare land, and tree vegetation by different value of proportion correct. ALOS PALSAR of 50 m, 12.5 m and 6 m resolutions, each has proportion correct in consequence 62.1%, 50.5% and 68,9% Visual analysis, the result of ALOS PALSAR image with resolution 50 m obtained 8 classes of land cover,which are as follows: water bodu, dry land agriculuture, settlement, harvested rice field, young forest plantation, middle-old forest plantation, nature forest, dan bare land. Whereas, accuration and separability analysis of ALOS PALSAR image of 50 m resolution has regular accuracy value 59.15% and kappa accuracy 53.48%. The result of the interpretation raising-ability analysis of ALOS PALSAR image of 12.5 m and 6 m resolutions to the ALOS PALSAR image of 50 m resolution are able to provide additional land cover classes, clarify the delineation and make easier the identification of land cover at the satellite image.
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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