Judul: Teknik Penyisipan Informasi pada Fitur Poligon Peta Vektor Menggunakan Reversible Watermarking
Abstrak: Digital vector maps have high precision. Unfortunatelly, watermarking in digital maps usually cause distortion. This study uses a reversible watermarking technique to overcome this issue. The purpose of this study is to apply a reversible watermarking technique to insert some information into digital maps with the ability to restore the map coordinates prior to insertion. In this study, the file used as the insertion media is a 2D digital map coordinate data in shapefiles and images is used as a the watermark. Reversible watermarking process is done on a vector map with polygon features and each insertion process is only performed on a polygon feature. Features that can be inserted should have larger number of vertices than the number of watermark bits. In this study, the watermark is obtained from the MD5 hash function so that the watermark is fixed at 128 bits. The study shows that information can be inserted to the map and that the coordinates can be restored to the initial coordinates. The quality of the map after the insertion shows a low distortion as reflected by the very small RMSE value.
Keyword: Root Mean Square Error (RMSE), reversible watermarking, digital map, coordinate

Judul: Pendekatan Baru untuk Verifikasi Integritas Peta Digital Berbasis Fitur Menggunakan Fragile Watermark
Abstrak: Watermarking can change the coordinates of features in map vector. Fragile watermarking technique is implemented to maintain the authenticity of the map and determine which features have been changed. Fragile watermarking technique was developed to giving watermark to each map feature. Quality testing was conducted by calculating the coordinates of each point of distortion due to watermark embedding, and the coordinates of each point are projected to calculate the shift in the real world. Testing the integrity of a map of the attack is done by comparing the value of the stored watermark and regenerated watermark. The attacks is done by manipulating the map by moving, adding and deleting map coordinates. This technique produces distortion on a scale of 10-4 and 10-7 meters distortion in the real world, so it is very difficult to detect visually to scale 1:1 map. This technique gives an additional coordinate for embedding watermark so consequently is berkas size be increased.
Keyword: watermark, fragile watermarking integrity, distortion

Judul: Essential Fatty Acid Requirements of Catfish (Clarias batrachus Linn.) for Broodstock Development
Abstrak: This experiment was conducted to determine essential fatty acid requirements of catfish (Clarias batrachus Linn.) for broodstock development. The basic diet supplied to the test fish had protein and fat content 46.51 - 48.29% and 5.8 - 5.96% respectively. The five test diets differed in the essential fatty acid (EFA) level. Diet A contained 0.21% (36-fatty acid and 0.03% S3-fatty acid; diet B 0.67% d6-fatty acid and 2.09%&3-fatty acid; diet C 2.24KU6-fatty acid and 0.07%&3-fatty acid; diet 0 1.85%(;36-fatty acid and 0.56% a3-fatty acid; diet E 0.26% a6 fatty acid and 1.68% d3-fatty acid. Most of US-fatty acid in diet B and D were 1$:3 (33, on the other hand those in diet E were 20:s c33 and 22:6 W3.
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