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: Implementasi dan Analisis Steganografi Audio Menggunakan Discrete Cosine Transform (DCT)
Abstrak: The rapid development of the internet and the digital information revolution caused significant changes in the global society, ranging from the influence on the world economy to the way people communicate. Digital communication strongly supports the ease of message exchange transactions, but on the other hand has a risk of security, especially for confidential messages. This research proposed implementation of steganography audio in WAV files transformed using DCT. The results of DCT coefficients are divided into an arbitrary number of segments and the energy of each segment is calculated. Text message are then embedded into the selected peaks of the highest energy segment with values ranging peaks from -0.4 – 0.4. Recovery text message from Stego-audio are extracted by performing the inverse operation of steganography embedding process. Simulation results indicate that a selected steganography technique meet the primary criteria of imperceptibility and recovery. In addition, the result of Signal-to-Noise Ratio (SNR) values range from 12dB – 40dB. The test quality of stego-audio makes use of objective and subjective analysis. The objective analysis uses Euclidean distance and the subjective analysis is based on survey
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Judul: Morphofunctional Characteristic of the Shoulder and Upper Arm Muscles of The Bornean Orangutan (Pongo pygmaeus)
Abstrak: Orangutans are arboreal primates that have similarities to gorillas and chimpanzees from both anatomical and physiological aspects, although there are distinct behaviors that allow for differentiation in the structure of the locomotor apparatus. This research aims to study the anatomy of the muscles of the shoulders and upper-arm of the Bornean orangutan associated with the type of locomotion and daily behavior. This study was conducted by observing the morphology of the shoulders and upper-arms muscles and watching their behaviors through video observations. The results showed that the rotator cuff muscles in orangutans were relatively thick resulted in well-fixed shoulders. Musculus rhomboideus occipitalis is only observed in orangutans to facilitate them during arboreal activities such as brachiation. The external trunk muscle in orangutans is found to be relatively large compared to chimpanzees and gorillas, due to the lifting of the upper arms while in trees and on the ground. Musculus brachioradialis and musculus biceps brachii were well developed as flexors of the elbow joint and hold the body mass while climbing up the tree. The Bornean orangutans' activities are more arboreal than those in gorillas and chimpanzees, thus their shoulder and upper arm muscles were more developed to support brachiation activities., Orangutans are arboreal primates that have similarities to gorillas and chimpanzees from both anatomical and physiological aspects, although there are distinct behaviors that allow for differentiation in the structure of the locomotor apparatus. This research aims to study the anatomy of the muscles of the shoulders and upper-arm of the Bornean orangutan associated with the type of locomotion and daily behavior. This study was conducted by observing the morphology of the shoulders and upper-arms muscles and watching their behaviors through video observations. The results showed that the rotator cuff muscles in orangutans were relatively thick resulted in well-fixed shoulders. Musculus rhomboideus occipitalis is only observed in orangutans to facilitate them during arboreal activities such as brachiation. The external trunk muscle in orangutans is found to be relatively large compared to chimpanzees and gorillas, due to the lifting of the upper arms while in trees and on the ground. Musculus brachioradialis and musculus biceps brachii were well developed as flexors of the elbow joint and hold the body mass while climbing up the tree. The Bornean orangutans' activities are more arboreal than those in gorillas and chimpanzees, thus their shoulder and upper arm muscles were more developed to support brachiation activities.
Keyword: arboreal, Bornean orangutans, shoulders and upper-arm muscles, terrestrial