United States

submitted by Samuel Bendett

Homeland Security Newswire - August 1, 2011

Sensor mounted to bridge member // Source: gizmag.com

One of every four U.S. highway bridges has known structural problems or exceeded its intended life-span. Most only get inspected once every one or two years; University of Maryland researcher has developed a new sensor that measures indicators of a bridge's structural health, such as strain, vibration, flexibility, and development of metal cracks; the sensors are expected to last more than a decade, with each costing about $20

Millions of U.S. drivers cross faulty or obsolete bridges every day, highway statistics show, but it is too costly to fix all these spans or adequately monitor their safety, says a University of Maryland researcher who has developed a new, affordable early warning system.

This wireless technology could avert the kind of bridge collapse that killed thirteen and injured 145 along Minneapolis’ I-35W on 1 August 2007, he says — and do so at one-one-hundredth the cost of current wired systems.

submitted by Mary Suzanne Kivlighan

Kaiser Family Foundation - July 19, 2011

The New Scientist reports on a software program that is being used "to identify a high correlation between the time and place where people tweet they have dengue and the official statistics for where the disease appears each season."

Researchers at two Brazilian National Institutes of Science and Technology worked together to create the software, which filters tweets containing the word "dengue" and user location details. "Dengue outbreaks occur every year in Brazil, but exactly where varies every season. It can take weeks for medical notifications to be centrally analyzed, creating a headache for health authorities planning where to concentrate resources," the publication notes. Using Twitter could speed up response time, according to Wagner Meira, a computer scientist at the Federal University of Minus Gerais who led the study (Corbyn, 7/18).