children need to learn to use the roads safety. road safety is essential for children’s freedom, development and exercise. when walking near a road it is a good idea to: 1. hold your child's hand. 2. don't let them run ahead. 3. look out for and encourage your child to be aware of hidden entrances or driveways crossing the pavement. 4. put reins on a younger child if they're not ...

The $J_1$-$J_2$ quantum spin sawtooth chain is a paradigmatic one-dimensional frustrated system exhibiting unconventional ground-state and finite-temperature properties. In particular, it exhibits flat energy band of one-magnon excitations accompanied by an enhanced magnetocaloric effect for two singular ratios the basal interactions $J_1$ zigzag $J_2$. our paper, we demonstrate that one can dr...

The crossing number crðGÞ of a graph G is the minimum possible number of edge crossings in a drawing of G in the plane, while the pair-crossing number pcrðGÞ is the smallest number of pairs of edges that cross in a drawing of G in the plane. While crðGÞXpcrðGÞ holds trivially, it is not known whether a strict inequality can ever occur (this question was raised by Mohar and Pach and Tóth). We ai...