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...

abstract         background and objective: paratuberculosis has been repeatedly reported from iranian ruminant herds. the extrem fastidious nature of mycobacterium avium subspecies paratuberculsos hinders genomic diversity studies of the pathogen. short sequence repeat analysis is one of the genome-based approches recently developed to overcome this difficulty. in this study we describe the app...

The moment map is a mathematical expression of the concept of the conservation associated with the symmetries of a Hamiltonian system. The abstract moment map is defined from G-manifold M to dual Lie algebra of G. We will interested study maps from G-manifold M to spaces that are more general than dual Lie algebra of G. These maps help us to reduce the dimension of a manifold much more.

it is necessary to design a model to implement iran’s comprehensive scientific map. we applied the grounded theory and used 31 in-depth qualitative interview with experts and known scholars of science, technology, and innovation. first the primary codes were identified by the qualitative analysis software (maxqda) and were analyzed and revised until theoretical saturation stage. then, the relia...

background alcoholic hepatitis (ah) is an acute manifestation of alcoholic liver disease with high mortality rates. objectives our aim was to study the molecular mechanisms of ah. materials and methods the differentially expressed genes (degs) in liver between ah and control cases were identified by analyzing the gse28619 microarray data using t-test. the kyoto encyclopedia of genes and genomes...

development of sensors to detect the location and depth of hard pans in real time is a major restriction on the application of site specific crop management (sscm). in this study, a soil compaction profile sensor equipped with four horizontal operating penetro-meters for on-the-go sensing and mapping of the location and intensity of hard pans arti-ficially formed in a soil bin was developed and...

the percent of normal precipitation index (pnpi) is a widely used drought index to provide good estimations about the intensity, magnitude and spatial extent of droughts. the objective of this study was analyzing spatial pattern of drought by pnpi index. in this paper, according to the data of 40 stations in iran, during 1967-2009, the pattern of drought hazard is evaluated. influenced zone of ...