Were Twin Towers felled by chemical blasts? (Update)

A mix of sprinkling system water and melted aluminium from aircraft hulls likely triggered the explosions that felled New York's Twin Towers on September 11, 2001, a materials expert has told a technology conference.

Understanding who commits which crimes

Why do some young men turn to crime, while others don't? An international study shows that preferences such as risk tolerance, impatience and altruism as well as self-control can predict who will commit crime. Risk-tolerant, ...

Control theory: Mother nature is an engineer

In the last 150 years, engineers have developed and mastered ways to stabilize dynamic systems, without lag or overshoot, using what's known as control theory. Now, a team of University of Arizona researchers has shown that ...

Study confirms classic theory on the origins of biodiversity

(PhysOrg.com) -- A Cornell study on the diversity of milkweed plants has used new techniques to prove an old theory that explains how the arms race between attacking insects and defended plants led to great diversity of both.

Can control theory make software better?

"Formal verification" is a set of methods for mathematically proving that a computer program does what it's supposed to do. It's universal in hardware design and in the development of critical control software that can't ...

Applying information theory to decentralized systems

For most computer users, information is only valuable when it serves a context-specific purpose, such as providing the GPS coordinates for a new restaurant or a list of search results for a query on airline flights to Fiji.

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