Judul: Analisis Luas Lahan Sawah Berbasis Citra MODIS di Provinsi Jawa Barat Tahun 2002-2012
Abstrak: West Java is the largest province in Java Island that had been experiencing rice field land conversion since 1999. Agricultural statistic data that provide by National Statistic Agency (BPS) has several lacks in monitoring process of rice field area year to year, therefore it is required to improve other alternatives to the collected data by satellite imagery. The aims of this research were to detect rice field area based on rice field categorization in West Java derived from MODIS imagery and to obtain the differences of rice field area between MODIS imagery and agricultural statistic data of BPS from 2002 to 2012. The results showed that there were noticeable differences of rice field area in Ciamis, Bogor, Bandung, and Purwakarta districts. In West Java, rice field area during 2002 until 2010 derived from MODIS imagery were higher than those derived from agricultural statistic data of BPS.
Keyword: West Java, paddy rice fields area, MODIS, agriculture statistic data

Judul: Analisis Dinamika Pola Tanam Sawah di Jawa Barat Menggunakan Citra MODIS EVI dengan Transformasi Wavelet dan Crosscorrelation
Abstrak: Konversi atau perubahan lahan sawah di Indonesia merupakan masalah krusial dan menjadi kecemasan seluruh rakyat Indonesia karena dapat mengancam ketahanan pangan. Menurut Badan Pusat Statistik (BPS), lahan sawah Provinsi Jawa Barat mengalami penurunan terbesar diantara Provinsi Jawa Timur dan Jawa Tengah pada tahun 2007 hingga 2014. Teknologi penginderaan jauh dan sistem informasi geografis (SIG) dapat memantau, menganalisis dan mengindetifikasi pola tanam sawah. Penelitian ini dilakukan untuk mendeteksi dinamika pola tanam sawah menggunakan citra MODIS EVI (MOD13Q1 h28v09, 16 hari komposit, resolusi 250m, 2001 hingga 2015) di Jawa Barat. Citra MODIS EVI pada penelitian ini telah melalui transformasi wavelet untuk mengurangi ganguan dari citra MODIS sebelum klasterisasi menggunakan k-mean clustering. Identifikasi Pola tanam di Jawa Barat dilakukan menggunakan crosscorrelation setiap kelas hasil k-means clustering. Dari hasil identifikasi pola tanam didapatkan sepuluh pola tanam, dengan lima pola utama dan lima pola campuran. Validasi lapang dilakukan untuk mengetahui tingkat akurasi hasil identifikasi pola tanam. Akurasi dari hasil validasi lapang adalah 73,38%.
Keyword: crosscorrelation, Jawa Barat, MODIS, pola tanam padi

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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