In this paper, constructing the improved chaotic map which multiplies output value of by a large value, and subtracts its integer part. Simulation results show that chaos range is enlarged. The generated sequence has strong randomness. A double image encryption algorithm proposed combining maps with permutation diffusion structure. can reduce complexity while ensuring effect. simulation resist ...

the present study was designed to investigate the impact of applying fill-in-the-map and construct-a-map techniques on efl learners’ knowledge of tenses. to this end, sixty efl elementary female students, who were selected based on their performance on a standardized teacher-made proficiency test, were randomly assigned into two equal experimental and control groups. in order to be convinced of...