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...

This paper evaluates the performance of different small area estimation methods using model and design-based simulation experiments. Design-based experiments are carried out Mexican Intra Censal survey as a census roughly 3.9 million households from which 500 samples drawn two-stage selection procedure similar to that Living Standards Measurement Study (LSMS) surveys. The considered Elbers, Lan...

mountainous rangeland ecosystems have a highly delicate position in ecologic areabecause of severe environmental conditions and having wildlife and livestock. knowing andrealizing the biotic and abiotic components, which have an interaction with each other in thisecosystem, perform the most important role in to desirable management of it. the systematicmanagement is one of the managing features...