Underwater acoustic stealth has great scientific research value. According to coordinate transformation theory, the cloak based on pentamode materials can realize underwater broadband stealth. However, due correlation between density and modulus of changes in parameters each layer cloak, a large amount structural optimization work is required for material meet specific parameter requirements, w...

There are a variety of bacterial defense strategies to survive in a hostile environment. Generation of extracellular polysaccharides has proved to be a simple but effective strategy against the host's innate immune system. A comparative genomics approach led us to identify a new protein family termed Stealth, most likely involved in the synthesis of extracellular polysaccharides. This protein f...

modern world is an interconnected space in which people in its different parts participate in a single common information system. the media are the main vehicles for this connectivity and can leave a strong impact on the attitudes of individuals towards aspects of family and childbearing. the media are also capable of changing the attitude of women toward the existing patterns of each culture t...