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- Y. Yusof, O.O. Khalifa
- 2008 International Conference on Computer and…
- 2008

Digital watermarking is distinctive depending on the techniques used and its intended applications. This paper concentrates on invisible digital image watermarking using discrete wavelet transform. The work flow involves watermark embedding, attacks and watermark extraction. Two methods are proposed and analyzed to imply the imperceptibility and robustness,… (More)

A Head splicing system (H-system)consists of a finite set of strings (words) written over a finite alphabet, along with a finite set of rules that acts on the strings by iterated cutting and pasting to create a splicing language. Any interpretation that is aligned with Tom Head's original idea is one in which the strings represent double-stranded… (More)

- Yuhani Yusof, Nor Haniza Sarmin, T. Elizabeth Goode, Mazri Mahmud, Fong Wan Heng
- 2011 Sixth International Conference on Bio…
- 2011

The first mathematical model of a splicing system that was analyzed in the framework of Formal Language Theory was developed in 1987 by Head. This model consists of a finite alphabet, a finite set of initial strings over the alphabet, and a finite set of rules that act upon the strings by iterated cutting and pasting, generating new strings. In this paper,… (More)

- Fong Wan Heng, Nor Haniza Sarmin, Yuhani Yusof
- 2010 IEEE Fifth International Conference on Bio…
- 2010

A mathematical model of a splicing system was firstly developed by Head in 1987. This model is abstractly analyzed in the framework of Formal Language Theory, which is a branch of Applied Discrete Mathematics and Theoretical Computer Science. This model consists of a finite set of initial strings over an alphabet that acts upon a finite set of rules. In… (More)

- Haniza Sarmin, Yuhani Yusof, Izzati Mat Hassim, Fadila Normahia Abd Manaf, Nor Haniza Sarmin
- 2013

The commutativity degree of a group is defined to be the probability that two elements in the group commute. In this paper, the commutativity degree of all 2-Engel groups of order at most 20 are computed using two approaches, namely the Cayley Table method and the conjugacy classes method.

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