Fracking tied to cancer-causing chemicals

Parameters Tied to Treewidth

Treewidth is a graph parameter of fundamental importance to algorithmic and structural graph theory. This article surveys several graph parameters tied to treewidth, including separation number, tangle number, well-linked number, and Cartesian tree product number. We review many results in the literature showing these parameters are tied to treewidth. In a number of cases we also improve known ...

MINING: EPA Tackles Fracking

Religiosity tied to socioeconomic status.

www.sciencemag.org SCIENCE VOL 327 5 FEBRUARY 2010 615 COVER A milliliter of seawater. Motile marine bacteria can take advantage of highly heterogeneous landscapes of dissolved organic carbon, resulting from zooplankton excretions (left), leakage by phytoplankton (top) and marine snow particles (bottom), and phytoplankton lysis (right). The Gordon Research Conference on Marine Microbes will be ...

Potentials for exposure to industrial chemicals suspected of causing developmental neurotoxicity

This brief report has been developed as an appendix to the article, “Developmental Neurotoxicity of Industrial Chemicals – A Silent Pandemic,” by Philippe Grandjean and Philip Landrigan, published in the November 8 online edition of The Lancet. An expanded search for neurotoxic chemicals revealed that 278 additional chemicals are considered to be neurotoxic by the (U.S.) National Institute of O...

Tied dice

A generalized die is a list (x1; :::; xn) of integers. For integers n 1, a b and s let D(n; a; b; s) be the set of all dice with a x1 ::: xn b and P xi = s. Two dice X and Y are tied if the number of pairs (i; j) with xi < yj equals the number of pairs (i; j) with xi > yj . We prove the following: with one exception (unique up to isomorphism), if X 6= Y 2 D(n; a; b; s) are tied dice neither of ...