Fragile X syndrome is the most frequent form of inherited mental retardation and is associated with a fragile site at Xq27.3. We identified human YAC clones that span fragile X site-induced translocation breakpoints coincident with the fragile X site. A gene (FMR-1) was identified within a four cosmid contig of YAC DNA that expresses a 4.8 kb message in human brain. Within a 7.4 kb EcoRI genomi...

Cities are among the most fragile biological settlements due to their complex internal structure and the influence by different variables. Given the realities of these settlements, in the event of devastating events such as earthquakes, these cities are definitely more fragile; consequently, returning to normal life seems to be much longer and costly. Therefore, considering the importance of th...

Cities are among the most fragile biological settlements due to their complex internal structure and the influence by different variables. Given the realities of these settlements, in the event of devastating events such as earthquakes, these cities are definitely more fragile; consequently, returning to normal life seems to be much longer and costly. Therefore, considering the importance of th...

Information acquired during skill learning continues to be processed long after practice has ceased. An important aspect of this processing is thought to be the transformation of a memory from a fragile to a stable state: a concept challenged by a recent study.

This paper deals with the quadratic stabilization of discrete-time LTI systems using state-feedback controllers with bounded coefficients. The controllers are guaranteed to be non-fragile with respect to additive or multiplicative implementation errors. The approach is based on robust-control tools and LMIs. Finally, an example is given in order to illustrate the effectiveness of the approach.

Cementitious matrices are the fragile materials that possess a low tensile strength. The addition of fibers randomly distributed in these matrices improves their resistance to cracking, substantially. However, the incorporation of fibers into a plain concrete disrupts the granular skeleton and quickly causes problems of mixing as a result of the loss of mixture workability that will be translat...