Judul: Steganalisis pada media audio menggunakan metode Support Vector Machine Radial Basis jiICntion (SVM-Rbf) Classifier
Abstrak: We address the problem of detecting the presence of hidden messages in audio. The detector is based on the characteristics of the denoised residuals of the audio, which may consist of a mixture of speech and music data. A set of generalized moments of the audio signal is measured in terms of objective and perceptual quality measures. The detector discriminates between cover and stego files using a selected subset of features and an Support Vector Machine (SYM) classifier. The proposed scheme achieves on the average 82,5 % discrimination perfomance on individual stegnographic tools. The perfomance for detecting non-embedded hidden messages in audio data is 25 % discrimination. Generally 63,3 % discrimination perfomance is achieved in universal tests. Experimental results show that the proposed tec1mique can be used to detect the presence of hidden messages in digital audio data.
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Judul: Steganalisis pada Berkas Audio Menggunakan Metode Linear  Regression Classifier
Abstrak: Kemajuan teknologi menyebabkan perkembangan terhadap cara mendistribusikan informasi. Untuk mengawasi pendistribusian informasi yang dilakukan secara tersembunyi maka dibutuhkan suatu metode yang dapat mendeteksi keberadaan pesan tersembunyi tersebut. Steganalisis atau pendeteksian terhadap pesan tersembunyi pada suatu media dapat digunakan sebagai metode untuk mengamankan informasi tersebut. Penelitian ini menggunakan metode Linear Regression Classifier untuk mengklasifikasikan suatu sinyal audio mengandung data tersembunyi atau tidak. Tujuan dari penelitian ini adalah mengukur tingkat akurasi metode Linear Regression Classifier jika diterapkan untuk teknik steganalisis media audio, tercakup di dalamnya proses De-Noising dan Audio quality measurement.
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Judul: Studies on growth spurt and aging in higher primates
Abstrak: single measurement that best defines the health and nutritional status of children, just as it provides an indirect measurement of the quality of life of an entire population. The pattern of human growth reflects the biocultural evolution of our species. The human pattern of growth and development (ontogeny) appears to differ markedly from patterns of ontogeny in other primate species. Three studies are reported here which deal to the growth and development of human and chimpanzee (Pan troglodytes). These three studies allow us to contrast the phenomena of adolescence growth spurt and female elderly bone loss in chimpanzee and human as chimpanzee is the closest species to humans within extant nonhuman primates. In the first, a cross-sectional study of growth of the body size and somatotype of 363 Javanese girls and 299 Javanese boys aged 4 to 20 years from Magelang Regency, Indonesia was described. In the second, cross-sectional and longitudinal studies in the growth of chimpanzee second metacarpal bone linear dimensions from individuals aged 0 to 43.6 years were used for comparison. While in the third, cross-sectional and longitudinal studies in the growth of chimpanzee body size (body mass and anterior trunk length) and second metacarpal bone mineral content were derived. In measuring the second metacarpal dimensions and mineral content, a total of 568 radiographs of chimpanzee's proximodistal left hands were used. They were taken from 68 females and 49 males aged 0 to 43.62 years old. We applied an image analysis system, Scion Image Release Alpha 4.0.3.2 software for Windows to measure bone linear dimensions and bone mineral content. Humans present complex and sinuous growth curves for both body weight and height. A clear growth spurt could be demonstrated by cross-sectional analysis in our girl subjects at around aged 11.5 years and in our boy subjects at around aged 12.5 years. In longitudinal series, not in cross-sectional, several representative chimpanzees of both sexes showed a pre-adult growth spurt on the body sizes, bone dimensions and bone mineral content. They ranged at age 4.5 to 8.5 years. This underscore the fact that adolescent growth spurt in linear dimension was not a universal feature of anthropoid primate ontogeny. Bone loss is a well established characteristic of human female aging. Based on crosssectional analyses the sequential decline of bone mass in female chimpanzee may be said to be genuine. On the other hand, we found in adulthood through elderly, male chimpanzees show a longer plateau than female chimpanzee, that is, bone mineral content is maintained in male.
Keyword: Javanese children, growth spurt, chimpanzee, second metacarpal bone, bone loss, Higher Primates