Judul: Perbandingan Metode SVD dan SSVD pada Kompresi Citra
Abstrak: Data compression is the process of converting an input data into other data which has a smaller size. The data can be a file on a computer or a buffer in the computer’s memory. Compression is useful because it helps reduce the consumption of resources such as data space or transmission capacity. The use of singular value decomposition (SVD) in image compression has been widely studied. If the image, when considered as a matrix, has low rank, or can be approximated sufficiently well by a matrix of low rank, then SVD can be used to find this approximation. That is, by not include some elements of the image, the approximation has been able to represents the original image. This thesis presents a variation for SVD image compression technique proposed by Ranade et al. called SSVD. This variation can be viewed as a preprocessing step in which the input image is permuted by independent data permutation after it is fed to the standard SVD algorithm. Likewise, this decompression algorithm can be viewed as the standard SVD algorithm followed by a postprocessing step which applies the inverse permutation. On experimenting with some standard images, SSVD performs substantially better than SVD. This thesis also presents experiment evidence with other simulated images, which appears that SSVD isn’t better than SVD.
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Judul: Perbandingan teknik watermarking berbasis SVD, DCT-SVD, dan SVD-DCT pada video digital
Abstrak: With the advantages of digital video processing, digital video can be manipulated and distributed illegally by irresponsible parties. Such actions are detrimental to owners of digital video and violate the copyright of the digital video. One solution to overcome this problem is to apply the watermarking technique in digital video. Watermarking techniques can be performed in spatial domain, frequency domain and hybrid domain. In the spatial domain, one of the watermarking techniques can be performed using Singular Value Decomposition (SVD) as proposed by Liu-Tan. In the frequency domain, one of the watermarking techniques can be performed using Discrete Cosine Transform (DCT). In the hybrid domain, one of the watermarking technique can be done by combining SVD with DCT. In this paper, the author tries to apply the watermarking technique proposed by Liu-Tan on digital video in spatial domain and hybrid domain. There are two methods in the domain of hybrid that will be proposed, namely the transformation of DCT-SVD and SVD-DCT transformation. Three watermarking technique compared based on the PSNR value of the insertion, insertion time, the correlation value from extraction, extraction time, and the robustness. Attacks carried out in this study is the attack noise, filtering attack, attack rotations, and cropping attacks. The results showed that the watermarking technique proposed by Liu-Tan is applied to the hybrid domain would increase the value of PSNR and correlation values, but vulnerable to some attacks. In the hybrid domain, the transformation of SVD-DCT is better than DCT-SVD transformation.
Keyword: Watermarking, Digital video, SVD Transform, DCT Transform, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Biologi Panacra elegantulus Herrich-Schaffe (Lepidoptera: Sphingidae) pada Tanaman Hias Aglaonema
Abstrak: Aglaonema merupakan tanaman hias dari famili Araceae. Banyak orang yang menyukai dan membudidayakan tanaman ini karena keindahannya. Salah satu hama dalam budidaya Aglaonema adalah Panacra elegantulus (Lepidoptera: Sphingidae). Penelitian ini bertujuan untuk mengetahui beberapa aspek biologi hama ini pada tanaman Aglaonema. Penelitian dilakukan di Laboratorium Biosistematika Serangga, Departemen Proteksi Tanaman, Fakultas Pertanian, Institut Pertanian Bogor, dari Januari hingga April 2014. Telur dan larva diperoleh dari lapangan dan dipelihara di laboratorium. Aspek biologi hama yang diamati meliputi jumlah instar larva, stadium larva dan pupa, lama hidup imago, dan reproduksi betina. Diamati pula musuh alami hama ini. Hasil penelitian menunjukan bahwa P. elegantulus terdiri dari empat instar. Rata-rata produksi telur imago betina 23.67 butir. Telur diletakan di bawah atau di atas permukaan daun. Rata-rata stadium telur, larva, dan pupa masing- masing adalah 4.25, 23.18, dan 13.12 hari. Pupa muda berwarna hijau dan berubah menjadi coklat. Lama hidup imago jantan dan betina adalah 4.18 dan 6.09 hari. Musuh alami hama ini terdiri dari dua famili dari ordo Hymenoptera (Eulophidae dan Braconidae) dan satu famili dari ordo Diptera (Tachinidae), ketiga parasitoid tersebut adalah parasitoid larva.
Keyword: Aglaonema, Araceae, Biologi, Panacra elegantulus, Sphingidae