The article describes the history of study anchor ice attached to bottoms rivers European part Russia and Siberia. Having analysed a large number publications, author current research attempts collect, summarize analyse results observations from first mentions beginning its in natural laboratory conditions. For time, this phenomenon was found on Siberian at end XVIII century; most relate Angara...

Trust, visibility, and the deepening of existing inequalities are major themes within platform care work literature. However, no study to date has applied these an analysis worker profiles. I investigate both how workers communicate trustworthiness through their profiles on Care.com, world’s largest platform, which rendered more less visible clients. Through a qualitative content (n=60) sampled...

A bottom tangle is a tangle in a cube consisting of arc components whose boundary points are on a line in the bottom square of the cube. A ribbon bottom tangle is a bottom tangle whose closure is a ribbon link. For every n-component ribbon bottom tangle T , we prove that the universal invariant JT of T associated to the quantized enveloping algebra Uh(sl2) of the Lie algebra sl2 is contained in...