Judul: Penerapan CBC-MAC berbasis DES dalam autentik citra
Abstrak: Teknologi yang semakin berkembang menyebabkan citra semakin mudah untuk dimodifikasi. Karena itu sangat sulit unt uk membedakan citra yang asli dan citra yang telah dimodifikasi. Citra yang telah dimodifikasi akan tampak seperti citra asli. Modifikasi citra yang dilakukan menyebabkan citra dengan mudah dipalsukan. Pemalsuan yang dimaksud adalah citra telah dimodifikas i namun secara fisik nampak sama seperti citra asli. Modifikasi yang dilakukan adalah dengan cara mengubah nilai bit -bit pada citra. Oleh karena itu diperlukan suatu metode untuk membedakan citra asli dan citra yang telah dimodifikasi. Autentikasi pada cit ra menggunakan algoritma CBC-MAC berbasis DES. Salah satu proses yang dilalui dalam autentikasi citra adalah penyisipan bit. Metode yang digunakan dalam penyisipan bit adalah metode Least Significant Bit (LSB). Pemeriksaan keaslian citra dilakukan dengan menghitung nilai Mean Square Error (MSE).
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Judul: Perbandingan Teknik Watermark CDMA dalam Domain Spasial dan Domain Wavelet pada Citra Digital
Abstrak: Presentation of data and information has been progressing quite rapidly, so data and information has been widely presented in digital format. Problems began to emerge as widespread digital data need to be protected. This is related to ownership, copyright, or authenticity issues. This study tries to provide solutions to these problems by applying the digital watermarking with Code Division Multiple Access (CDMA) technique. This technique uses a digital image composed of a cover image and two types of watermark (initial and copyright). There are two stages in this research, the first is trying to insert two types of watermark on the cover image in two different domains, namely spatial domain and wavelet domain. Once inserted, the watermark is extracted back to be compared with the original watermark. The second is attempting to insert an initial watermark on the cover image in two different domains, then giving some distortion of the image to be tested for resistance. After that, the watermark is extracted again. From the experiment results, it is known that wavelet domain CDMA is superior in terms of quality of the extracted watermark, processing time, and resistance to distortion (JPEG compression and gamma correction). While CDMA coding spatial domain is simpler and has a resistance to gamma correction only.
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Judul: Anatomi Otot Daerah Panggul dan Paha Landak Jawa (Hystrix javanica)
Abstrak: This study was conducted to observe the anatomical structure of pelvic and thigh muscles in Javan porcupine included their origins and insertions in order to describe the possible functions of each muscles. This study used two specimen of adult male porcupines preserved in 10% formalin. Observations carried out by observing the outer morphology of pelvic and thigh regions. Determination of structures, origins, and insertions of each muscles was done by dissecting the superficial and deep layers and the muscles were named according to the Nomina Anatomica Veterinaria 2005. The muscles which found in pelvic and thigh regions were the cutaneous, psoas minor, iliopsoas (psoas major and iliacus venter lateral et medial), quadratus lumborum, tensor fasciae latae, gluteus superficialis, gluteus medius, piriformis, gluteus profundus, biceps femoris, abductor cruris caudalis, semitendinosus, semimembranosus, quadriceps femoris (vastus lateralis, rectus femoris, vastus intermedius, and vastus medialis), gemelli, obturatorius externus, obturatorius internus, sartorius, gracilis, pectineus, adductor longus, and adductor magnus et brevis. The results showed that Javan porcupine has unique structure of pelvic and thigh muscles that is the prominent of cutaneous muscle was extended up to the pelvic and thigh regions, the quadratus lumborum with two bellies, and the course of biceps femoris and semitendinosus which reached up to the sacrum and coccygeal regions. The structure of these pelvic and thigh muscles are sugested to be related with the adaptation and behavior of Javan porcupine during erecting the quills, rattling the tail quills, rushing enemies, and digging burrows.
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