abstract a mountain glacier, when it occupies a river valley, immediately begins to change the cross-section and profile of that valley. river valleys in mountain areas tends to have v-shaped profiles. glaciers work to widen as well as deepen their valleys and the typical cross-section of a glacial valley is u-shaped. the u-shaped glacial valley is one of the most characteristic of glacial land...

1. Barak, P., Jobe, B.O., Krueger, A.R., Peterson, L.A., Laird, D.A., 1997. Effects of long-term soil acidification due to nitrogen fertilizer inputs in Wisconsin. Plant and Soil 197, 61–69. https://doi.org/10.1023/A:1004.... CrossRef Google Scholar

HILL Entropy and Metric Entropy are generalizations of the information-theoretic notion of min-entropy to the setting where an adversary is computationally bounded. The notion of HILL Entropy appeared in the breakthrough construction of a PRG from any one-way function, and has become the most important and most widely used definition of computational entropy. In turn, Metric Entropy which is de...

A Barak-Erdős graph is a directed acyclic version of an Erdős-Rényi graph. It is obtained by performing independent bond percolation with parameter p on the complete graph with vertices {1, ..., n}, where the edge between two vertices i < j is directed from i to j. The length of the longest path in this graph grows linearly with the number of vertices, at rate C(p). In this article, we use a co...

Barak et al. showed how to significantly reduce the entropy loss, which is necessary in general, in the use of the Leftover Hash Lemma (LHL) to derive a secure key for many important cryptographic applications. If one wants this key to be secure against any additional short leakage, then the min-entropy of the source used with the LHL must be appropriately bigger (roughly by the length of the s...