Judul: Backscatter Characterization of Multi-temporal Radarsat Imagery in Ajkwa Tailing Deposition Area (Papua, Indonesia)
Abstrak: This Research investigated the characteristic of Multi-temporal Radarsat backscatter in F2N Identical Swath mode with more than 6 years of acquisition period. It included the assessment of the stability of Radarsat imageries for multi­temporal analysis by using variance analysis on the selected sample area of "permanent" landcover. This analysis, I was used to obtain Radarsat signal changes caused by the micro-geomorphology of tailing material propagation at the Modified Ajkwa Deposition Area (ModADA) of PT Freeport Indonesia, Timika, Papua. For this purpose, the 8 bit multi-temporal imageries was overlayed and interpreted, to describe the sequences of land cover dynamics resulting from the propagation of tailing material deposition. This overlay was visualy clear to describe the changes in signal characteristic due to certain condition of land surfaces. The result indicated different range of reflections. Diffuse reflection was detected on the undisturbed forest, natural comer reflection was related to the flooded vegetation, and specular reflection was mostly found on the established tailing. The reflection types was used to discriminate and to describe the segmentation class of Radarsat backscatter on the study area. Finally the segmentation analysis trial for each classs was implemented in the given image part. The intention was to assess the radar backscater characterstics as a potential information to study the sequence of moving tailing material in the tailing management purposes.
Keyword: Remote Sensing, Radar, Backscatter, Multi-Temporal, Segmentation, Tailing

Judul: synthetic aperture radar, peri-urban, TerraSAR-X, tone, texture, decision tree
Abstrak: Peri-urban is developed in urban or metropolitan fringe. The area has particular characteristics such as scattered settlements, slightly urbanized, fast population growth and a tendency of environmental degradation. Monitoring in this area is then required, especially to assess agricultural land conversion. This paper discusses an application of dual-polarized TerraSAR-X Spotlight Mode to retrieve various land cover in Sidoarjo, East Java. Specifically, the research studied discrimination among water bodies, rice fields, settlements, woody vegetation and industrial parks at X-band. The research compiled tonal and textural information from those land cover types and fed those signatures into statistical analysis. Decision tree classification method is applied to classify and to find most informative features. The results suggested that TerraSAR-X has capability to distinguish some land cover features; nonetheless, some objects could not have specific tonal/textural signatures, making them hard to classify.
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Judul: Peranan oxytocin pada proses kelahiran
Abstrak: Menginginkan terpenuhinya protein hewani, perlu adanya peningkatan populasi ternak. Salah satu faktor yang menunjang untuk peningkatan ini adalah suatu keselamatan dalam proses ke lahiran dalam arti kata lahir dengan selamat dan sehat untuk induk maupun anak. Proses kelahiran melibatkan beberapa faktor yaitu faktor syaraf, otot, mekanis, dan hormonal. Hormon-hormon yang berperan dalam proses kelahiran adalah hormon estrogen, progesteron, glucocorticoid, prostaglandin F2 alfa, oxytocin dan relaxin. Didalam penulisan ini dipelajari sejauh mana oxytocin dalam proses kelahiran, mencakup tentang peranan sifat-sifat dasar, struktur kimia, bio sintesa, dan mekanisme kerja hormon oxytocin secara umum. Oxytocin didalam mempengaruhi aktivitas organ sasarannya akan berkaitan dengan reseptor protein, hormon tersebut ti dak masuk kedalam sel tetapi hanya berinteraksi dengan reseptor yang terdapat pada dinding sel. Hormon ini dihasilkan dari sel-sel inti supraoptika dan sel inti paraventriculariş yang berada di Hypothalamus dan dialirkan melalui tangkai axon Hypothalamo Hypophysa dalam bentuk butir sekretori ke Hypophysa pars posterior atau disebut juga pars nervosa. Rangsangan dilepaskannya oxytocin karena adanya reflek mengisap atau menyusui pada kelenjar mamae, dan juga karena te kanan pada cervix waktu perejanan. Daya kerja oxytocin berupa kontraksi urat daging licin pada muskulatur uterus dan urat daging licin pembungkus alveo- lus kelenjar susu. Hormon estrogen membantu berupa pemekaan musculatur uterus terhadap pengaruh oxytocin sehingga oxytocin bekerja optimal. Gangguan hormonal akan menyebabkan kegagalan kelahiran, oleh sebab itu preparat hormon dapat digunakan untuk menanggulangi problema yang berkaitan dengan gangguan hormonal yang me nyebabkan gagalnya proses kelahiran. Akan tetapi yang penting diketahui yaitu waktu pemberian yang tepat. Lebih Seperti halnya pada oxytocin, pemberian yang tepat pada saat cervix sudah berdilatasi ialah pada perejanan terakhir. Jika pemberian dilakukan sebelumnya, maka hal-hal yang tidak diinginkan seperti ruptura upteri akan terjadi…
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