a watermarking scheme for grayscale image isproposed based on a family of the chaotic maps and discretecosine transform. jacobian elliptic mapis employed to encrypt ofwatermarked logo. piecewise nonlinear chaotic map is also usedto determine the location of dct coefficients for the watermarkembedding. the purpose of this algorithm is to improve theshortcoming of watermarking such as small key s...

the efficacy of bacterial cultures and is900-specific polymerase chain reaction (pcr) was compared for the detection of mycobacterium avium subsp. paratuberculosis (map) from the mesenteric lymph nodes of goats. samples were collected from 75 goats slaughtered in ilam, in southwest of iran. tissue homogenates were inoculated onto four media. the genomic dna was extracted directly from mesenteri...