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Protection Equipment Demonstration: Something for Everyone

Under rows of tents and inside large aircraft hangars, more than 2,600 force protection products were demonstrated and exhibited for Defense Department, federal and local agencies at Force Protection Equipment Demonstration IV May 6-8. Among the highlights: Geocell Systems, which demonstrated how to build sand barriers using a foldable plastic device. The modular and collapsible plastic grids require no special tools and can be assembled in seconds to hold sand horizontally to any desired length. The grids are also stackable to hold sand vertically. Barney Greinke, director of marketing for the company, said the sand-filled wall can act as a barrier against vehicles, and can help stop small-arms fire and blast fragments from small bombs. “You have to understand that a wall of sand 4 feet wide by 8 feet tall weighs around 12,000 pounds,” Greinke said, “So it can be quite effective. It’s basically replaces the sandbag.”

Noisy inner life of cells

Within the smoothly operating factory that is the cell, tiny molecular machines carry out their tasks with order and certainty. Or at least that’s what many scientists once believed. In a recent issue of Science, researchers report the first demonstration that bacterial cells intrinsically possess a significant degree of randomness or “noise.” More precisely, they show that key “gene-reading” machines may operate unpredictably, resulting in randomly fluctuating amounts of individual proteins.