We present BIMA and IRAM CO (1–0) observations of seven low surface brightness (LSB) galaxies, including three large spiral galaxies with faint disks but prominent bulges and four relatively small LSB galaxies with irregular disks. The giant LSB galaxies are UGC 5709, UGC 6614, and F568-6 (Malin 2). The smaller LSB galaxies are NGC 5585, UGC 4115, UGC 5209, and F583-1. The galaxies were selecte...

The Least Significant Bit (LSB) substitution is an old and simple data hiding method that could almost effortlessly be implemented in spatial or transform domain over any digital media. This method can be attacked by several steganalysis methods, because it detectably changes statistical and perceptual characteristics of the cover signal. A typical method for steganalysis of the LSB substitutio...

We consider the problem of detecting the presence of hidden data in colour bitmap images. Like straightforward LSB Replacement, LSB Matching (which randomly increments or decrements cover pixels to embed the hidden data in the least significant bits) is attractive because it is extremely simple to implement. It has proved much harder to detect than LSB Replacement because it does not introduce ...

In this paper, proposed an advance approach for dynamic data protection using LSB and hybrid approach. Steganography is the art of communicating a message by embedding it into multimedia data. The proposed method for replacing one or two or three LSB of each pixel in video frame and apply Advance encryption standard (AES). It becomes very difficult for intruder to guess that an image is hidden ...

The optical and H I properties for a sample of low surface brightness (LSB) dwarf galaxies, cataloged from the Second Palomar Sky Survey, is presented. Gas mass fractions for LSB dwarfs reach the highest levels of any know galaxy type (fg =95%) confirming that their low stellar densities are due to inefficient conversion of gas mass into stellar mass. Comparison with star formation models indic...

Recent advancements in computer security have shifted the focus of security officials from, using only the cryptography techniques to using steganography as well, or the combination of both. In steganography the most widely used technique is the LSB method, but this technique being the simplistic of all, is well known and hence is vulnerable to attacks. However, modifying the LSB method to the ...

Received ; accepted – 2 – ABSTRACT Although numerous simulations have been done to understand the effects of intense bursts of star formation on high surface brightness galaxies, few attempts have been made to understand how localized starbursts would affect both the color and surface brightness of low surface brightness (LSB) galaxies. To remedy this, we have run 53 simulations involving burst...

Steganography is the art of hiding the fact that communication is taking place, by hiding information in other information.In this paper proposed method focus on improving quality of stego image by increasing value of PSNR and SNR with less number of LSB changed compare to simple LSB method result in better security. This paper also compares results of proposed method with simple LSB.

İnternetin yaygın kullanılması ile birlikte veri iletimi kolaylaşmıştır. Bütün iletişim biçimlerinde, özellikle gizli iletişimde, güvenliği en önemli unsurdur. Bu nedenle, verinin güvenliğini sağlamak için şifrelenmesi eski yöntemdir ve buna kriptografi adı verilmektedir. Kriptografi, bilgiyi güvence altına almak kullanılan etkili bir yöntem olsa da bilginin varlığını belli eder. Steganografi i...