The Haiti earthquake relief effort in 2010 involved numerous civil and military organizations engaged in vigorous relief operations, exemplifying rapid deployment of logistics, transport, security and medical supplies. Yet, to determine the effectiveness of these operations, and to understand how these various organizations collaborated, and eventually how to improve the future overall effectiv...

Catechol-O-methyltransferase (COMT) inactivates dopamine in prefrontal cortex and is associated clinically with a schizophrenia endophenotype. Using an ethologically based approach, the phenotype of mice with heterozygous COMT deletion was characterised by decreased rearing with increased sifting and chewing. Heterozygous COMT deletion is associated with a distinctive phenotype. This differs fr...

We propose a two-phase heuristic for crossing reduction in circular layouts. While the first algorithm uses a greedy policy to build a good initial layout, an adaptation of the sifting heuristic for crossing reduction in layered layouts is used for local optimization in the second phase. Both phases are conceptually simpler than previous heuristics, and our extensive experimental results indica...

It appears that Health Canada’s Sodium Working Group, which was appointed two years ago to craft a national strategy to reduce Canadian salt consumption, is bogged down with matters of process and disagreements over what, if anything, should be done to limit sodium consumption. But cochairs Hasan Hutchinson and Mary L’Abbe say they can’t comment about whether the group is in disarray because of...

My love of nature began in the field, forest, and creek behindmy house where I spent my summer days catching butterflies, salamanders, minnows, and toads. In high school, the logic and irrefutability of geometry proofs turnedme into a rational thinker. College steered me towards molecular biology. Graduate school introducedme to the art of generating data. My mentor, Joyce Hamlin, and the great...

The feedback arc set problem plays a prominent role in the four-phase framework to draw directed graphs, also known as the Sugiyama algorithm. It is equivalent to the linear arrangement problem where the vertices of a graph are ordered from left to right and the backward arcs form the feedback arc set. In this paper we extend classical sorting algorithms to heuristics for the feedback arc set p...

The article studies the current problems of screening bulk materials by airflow, both in combination with sieve installations, and separately during pouring; optimal size holes sieves, as well fractional characteristics sifting food masses, which depend on technological efficiency specific productivity machines. purpose is to evaluate mechanics vibration process determine limits intensity vibra...