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: Biology and ecology of the buffalo fly, haematobia exigua de meijere (diptera:muscidae)
Abstrak: The life history of the buffalo fly was observed at room temperature of 27°-29.5°C and at a relative humidity of 48-68 percent. The eggs hatched after 17-22 hours, with an average of 18 hours. First instar larvae measured 1.25 + 0.16 mm long and 0.27 + 0.037 mm wide. reach the second larval stage. It took 6-12 hours to the second instar larvae measured 2.676 +0.187 mm long and 0.353 +0.028 mm wide. The second instar took about 12-24 hours to reach the third larval stage. The third instar measured 6.833 + 0.189 mm long and 0.919 + 0.051 mm wide. It took about 2-3 days for the third instar to become pupae. Duration of the pupal stage was about 5-7 days before the adults emerged. Under laboratory condition, the buffalo fly completed its life cycle in 9.5 to 10.5 days, whereas under field condition it took 9-14 days with an average of 10.5 days. The growth ratio which was based on the measurements of the cephalo-pharyngeal skeleton of each instar was 1.797. The preoviposition period was 8-12 days and mating usually occurred on the 6th or 7th day. The longevity of the male was 29 days, whereas it was 32 days in the female. The range of egg production under laboratory condition was between 20-139 per female fly. The belly and hind legs of the carabao were the most preferred habitat either during cloudy and cool dry or shiny and warm day. When the weather was clear and the carabao was in the shade, the flies tended to be more distributed particularly on the shoulder, dewlap, back and horns. The carabaos had relatively fewer Musca sp. and Stomoxys calcitrans than cattle; never the less carabaos had a higher infestation of buffalo fly than cattle. Oviposition occured either during the day or night but the buffalo flies were more active during the night than in the day time. The effect of various lengths of exposure time of manure in relation to the oviposition was profound. observed, the maximum number of the buffalo flies was occurred when the dung was exposed for 30 minutes. With increasing time of exposure the number and variety of insects also increase. It was evident that Sepsidae and psychodidae were the most dominant insects emerging from the dung. The number of buffalo flies also increased with increasing
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