Judul: Land cover changes and its relation to the habitat of the dolphin (Orcaella brevirostris) in Segara Anakan, Cilacap, Central Java
Abstrak: Segara Anakan merupakan muara dari beberapa sungai besar (Sungai Citanduy, Cibeureum dan Cikonde). Aliran sungai tersebut membawa partikel tanah ke muara sungai yaitu ke Laguna Segara Anakan (LSA). Daerah mangrove bisa menjadi sangat luas karena terbentuknya delta baru yang memiliki struktur tanah berlumpur akibat penumpukan sedimen. Terdapat spesies langka dan dilindungi yang terancam punah di Laguna Segara Anakan, yaitu pesut (Orcaella brevirostris). Spesies tersebut dapat punah karena kehilangan habitatnya. Penelitian ini bertujuan menganalisis keterkaitan antara perubahan tutupan lahan di Segara Anakan dengan habitat pesut. Perubahan tutupan lahan diklasifikasikan menggunakan metode visual dan digital (supervised classification), sedangkan keterkaitannya dengan habitat pesut dibahas secara deskriptif. Hasil menunjukkan bahwa tutupan lahan mangrove mengalami penyusutan sebesar 9523,77 ha sedangkan perairan mengalami penyusutan sebesar 5132,38 ha selama kurun waktu 42 tahun. Degradasi mangrove yang dibarengi konversi lahan mangrove menjadi tutupan lahan lainnya (lahan terbuka, permukiman dan lahan terbangun) telah mengakibatkan penyusutan perairan di Segara Anakan sebesar 70,10% yang merupakan habitat pesut (O. brevirostris)., Segara Anakan is the estuary of several major rivers (Citanduy, Cibeureum and Cikonde rivers). The flow of the river carries soil particles to the mouth of the river. Mangrove areas can be very large because of the new delta which has a muddy soil structure due to the accumulation of sediment. There is a rare and protected species that is threatened with extinction in the Segara Anakan Lagoon, namely irrawaddy dolphin (Orcaella brevirostris). These species can become extinct due to loss of their habitat. This study aims to analyze the relation between land cover changes in Segara Anakan and the dolphin habitat. Land cover changes were classified using visual and digital methods (supervised classification), then the relation to irrawaddy dolphin habitat was discussed descriptively. The results show that the mangrove land cover has decreased by 9523,77 ha while the waters have decreased by 5132,38 ha over a period of 42 years. Mangrove degradation and the conversion of mangrove land into other land covers (open land, settlements and built-up land) has resulted in a 70,10% reduction in the waters of Segara Anakan which is the habitat of the dolphin (O.brevirostris).
Keyword: irrawaddy dolphin habitat, mangrove, remote sensing, land cover changes, Segara Anakan

Judul: Perspektif Kelestarian Pesut Mahakam (Orcaella brevirostris Gray, 1866) Berdasarkan Habitat serta Persepsi dan Sikap Mayrakat (Studi Kasus Masyarakat sekitar Danau Semayang dan Danau Melintang), Kinerja Pengelolaan dan Strategi Pengembangan Wisata Alam Situ Gunung Taman Nasional Gunung Gede Pangrango.
Abstrak: Irrawaddy dolphin (Orcaella brevistoris) is a protected spesies area and in Appendix I of CITES 2009. Objectives of this study were to analyze the relationship between perception and attitudes of the community with the habitat conditions of the irrawaddy dolphin in Semayang Lake and Melintang Lake for irrawaddy dolphin sustainability and also formulating efforts to conserve irrawady dolphin. This study was conducted in Semayang Lake, Melintang Lake, and its surrounding on July to August 2009. Tools and materials used in this study were a questionnaire, bottled water samples, the rope with weights, secchi disc, litmus paper, watches, net and motorboat. Data in this study consisted from two main types data, which were irrawady dolphins’s habitat characteristic and data of community perceptions and attitudes about irrawaddy dolphins. Enclosed questionnaires and interviews methods used to obtain data of perception and attitudes. likert scale used to analyze data of community perception. Descriptive analysis used to analyze community attitude data. Community perceptions of irrawady dolphins were positive, based on likert scale analysis. Government rules very affected in conservation action to irrawady dolphin;s conservation action and have highest value compared to another variables and the score was 523 with the average was 4, 36, and it’s mean that the community realized that government was very important to irrawaddy dolphin’s sustainability. Based on interview result to the community, there were some attitude which have negative impact to irrawaddy dolphin’s habitat which were throwing the garbage to the water. The depth of Semayang Lake was (1,15-2 m) and Melintang Lake was (0,75-1,5 m) and impossible for irrawady dolphin to live there due to their large body size. Fish productivity in both lake is very low, which were 1,8 kg/net/day in Semayang Lake and 2,25 kg/net/day for Melintang Lake. Water traffic frequency in mouth area of Pela River in holiday is higher (55 times/hour) than in working day (54 times/hour). Lack productivity of fish and water traffic caused Irrawady dolphins could not be found in both lake because irrawady dolphins preferred area which have a lot of fish and calm stream water. Based on problem above, there some action can be done for irrawaddy dolphins sustainability which are managing habitat, setting the habitat as a conservation area, dredging the lake, make alternative way in water traffic, law enforcement, and make law about fishing procedures. Delivering information to the community about environment health education can be done to change community attitude that related to irrawady dolphins sustainability. Knowledges about environment health is very important to raise people awareness about the importance of Irrawaddy dolphins.
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Judul: Sintesis Timbal Zirkonat Titanat (Pb(ZrxTi(1-x))O3) dengan Metode Lelehan Garam: Pengaruh Suhu dan Waktu Sintering
Abstrak: Timbal zirkonat titanat (Pb(ZrxTi(1-x))O3, x = 0.52) atau PZT merupakan suatu bahan keramik perovskit yang memiliki sifat piezoelektrik sangat baik dibandingkan bahan lainnya. Ukuran bahan ini sangat penting untuk aplikasi ultrasonografi, sehingga diperlukan metode sintesis yang dapat mengendalikan ukuran PZT, salah satunya adalah metode lelehan garam. Metode ini dapat mengendalikan ukuran partikel dengan meragamkan parameter sintesis, seperti suhu dan waktu sintering. Pembentukan PZT diawali dengan reaksi PbO dan TiO2 membentuk intermediet PbTiO3 lalu bereaksi dengan ZrO2 membentuk PZT. Produk sintesis dicirikan dengan difraktometer sinar-X, mikroskop elektron payaran, penganalisis ukuran partikel, dan adsorpsi Brunauer Emmett Teller. PZT dengan metode lelehan garam berhasil disintesis pada suhu sintering 775 °C selama 4 jam. Suhu dan waktu sintering tidak secara nyata memengaruhi ukuran partikel dan kristalinitas PZT. Partikel terkecil 659 nm diperoleh pada suhu sintering 875 °C selama 4 jam.
Keyword: lelehan garam, perovskit, piezoelektrik, PZT